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Green Tea Extract Ameliorates Learning and Memory Deficits in Ischemic Rats via Its Active Component Polyphenol Epigallocatechin-3-gallate by Modulation of Oxidative Stress and Neuroinflammation.

Kuo-Jen Wu, Ming-Tsuen Hsieh, Chi-Rei Wu, W Gibson Wood, Yuh-Fung Chen
Other Evidence-based complementary and alternative medicine : eCAM 2012 93 인용
PubMed DOI PDF
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Study Design

연구 유형
In Vitro
대상 집단
Cerebral ischemic rats
중재
Green Tea Extract Ameliorates Learning and Memory Deficits in Ischemic Rats via Its Active Component Polyphenol Epigallocatechin-3-gallate by Modulation of Oxidative Stress and Neuroinflammation. None
대조군
Ischemic rats without treatment
일차 결과
Learning/memory deficits and neuroinflammation in ischemic rats
효과 방향
Positive
비뚤림 위험
Unclear

Abstract

Ischemic stroke results in brain damage and behavioral deficits including memory impairment. Protective effects of green tea extract (GTex) and its major functional polyphenol (-)-epigallocatechin gallate (EGCG) on memory were examined in cerebral ischemic rats. GTex and EGCG were administered 1 hr before middle cerebral artery ligation in rats. GTex, EGCG, and pentoxifylline (PTX) significantly improved ishemic-induced memory impairment in a Morris water maze test. Malondialdehyde (MDA) levels, glutathione (GSH), and superoxide dismutase (SOD) activity in the cerebral cortex and hippocampus were increased by long-term treatment with GTex and EGCG. Both compounds were also associated with reduced cerebral infraction breakdown of MDA and GSH in the hippocampus. In in vitro experiments, EGCG had anti-inflammatory effects in BV-2 microglia cells. EGCG inhibited lipopolysaccharide- (LPS-) induced nitric oxide production and reduced cyclooxygenase-2 and inducible nitric oxide synthase expression in BV-2 cells. GTex and its active polyphenol EGCG improved learning and memory deficits in a cerebral ischemia animal model and such protection may be due to the reduction of oxidative stress and neuroinflammation.

요약

GTex and its active polyphenol EGCG improved learning and memory deficits in a cerebral ischemia animal model and such protection may be due to the reduction of oxidative stress and neuroinflammation.

Full Text

Research Article Green Tea Extract Ameliorates Learning and Memory Deficits in Ischemic Rats via Its Active Component Polyphenol Epigallocatechin-3-gallate by Modulation of Oxidative Stress and Neuroinflammation

Kuo-Jen Wu,1 Ming-Tsuen Hsieh,1 Chi-Rei Wu,1 W. Gibson Wood,2 and Yuh-Fung Chen3,4

1School of Chinese Pharmaceutical Sciences and Chinese Medicine Resources, College of Pharmacy, China Medical University, 91 Hsueh-Shih Road, Taichung 40402, Taiwan

  1. 2Department of Pharmacology, University of Minnesota and Geriatric Research, Education and Clinical Center, VA Medical Center, Minneapolis, MN 55455, USA
  2. 3Department of Pharmacology, College of Medicine, China Medical University, 91 Hsueh-Shih Road, Taichung 40402, Taiwan
  3. 4Department of Pharmacy, China Medical University Hospital, Taichung 40421, Taiwan Correspondence should be addressed to Yuh-Fung Chen, [email protected] Received 22 March 2012; Revised 6 June 2012; Accepted 8 June 2012 Academic Editor: Paul Siu-Po Ip

Copyright © 2012 Kuo-Jen Wu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Ischemic stroke results in brain damage and behavioral deficits including memory impairment. Protective effects of green tea extract (GTex) and its major functional polyphenol (−)-epigallocatechin gallate (EGCG) on memory were examined in cerebral ischemic rats. GTex and EGCG were administered 1hr before middle cerebral artery ligation in rats. GTex, EGCG, and pentoxifylline (PTX) significantly improved ishemic-induced memory impairment in a Morris water maze test. Malondialdehyde (MDA) levels, glutathione (GSH), and superoxide dismutase (SOD) activity in the cerebral cortex and hippocampus were increased by long-term treatment with GTex and EGCG. Both compounds were also associated with reduced cerebral infraction breakdown of MDA and GSH in the hippocampus. In in vitro experiments, EGCG had anti-inflammatory effects in BV-2 microglia cells. EGCG inhibited lipopolysaccharide- (LPS-) induced nitric oxide production and reduced cyclooxygenase-2 and inducible nitric oxide synthase expression in BV-2 cells. GTex and its active polyphenol EGCG improved learning and memory deficits in a cerebral ischemia animal model and such protection may be due to the reduction of oxidative stress and neuroinflammation.

1. Introduction

Ischemic stroke results from a temporary or permanent reduction of cerebral blood flow that leads to functional and structural damage in different brain regions. Cellular damage occurs during ischemia [1, 2] and reperfusion [3, 4]. Deleterious effects include ATP depletion, intracellular calcium changes, loss of ion homeostasis, excitotoxicity, activation of enzymes, arachidonic acid release, and mitochondrial dysfunction [5, 6].

These changes are associated with increased production of reactive oxygen species (ROS) which can cause severe

oxidative damage to brain tissue [7]. Superoxide dismutase (SOD), glutathione peroxidase (GSH-Px), and catalase (CAT) are involved in the intracellular defense against ROS [8]. ROS are usually scavenged by antioxidant enzymes, such as SOD. SODs catalyze the production of O2 and H2O2 from superoxide (O2−) followed by catalase and glutathioneperoxidase-catalyzed decomposition of hydrogen peroxide into water [9]. Subsequently, reperfusion can trigger inflammation mediated by phospholipases, COX-2, and nitric oxide synthases (NOSs) [5, 6].

Some brain regions, such as the striatum and hippocampus, are more vulnerable to ischemic damage [10]. CA1

hippocampal pyramidal neurons exhibit cell death several days after ischemic injury [11]. Spatial memory in rats and humans is largely dependent on the hippocampus [12] and hippocampal neuronal damage induced by ischemia is associated with spatial memory impairment. Microglia is widely distributed throughout large nonoverlapping regions of the central nervous system [13, 14]. Microglia is sensitive to even small pathological changes and is traveling within the brain [15, 16] and will be stimulated to proliferate when the brain or tissues are damaged. They are constantly cleaning damaging neurons, plaques, and infectious pathogens, to stop potentially fatal injuries [17]. Over the past decade, they are considered as a modulator of neurotransmission, although the mechanisms are not yet fully understood [18, 19]. Murine BV-2 microglia cells were consciously used to study the bioactivities of neuroprotection, synthases, and cytokine of microglia cells [20–22].

Green tea was neuroprotective in ischemia-reperfusion brain injury in rats and gerbils [23–25]. The main catechins in green tea are (−)-epicatechin; (−)-epicatechin gallate (ECG); (−)-epigallocatechin (EGC); (−)-epigallocatechin gallate (EGCG). EGCG is the most active polyphenol in green tea [26]. EGCG has antioxidative [27], anticancer [28], and anti-inflammatory effects [29, 30]. Many studies have reported that EGCG had neuroprotective effects in animal models of cerebral ischemia [31–34] which may be attributed to its antioxidant and free radical scavenging actions. There have been few studies reporting on the effects of green tea and its main component, EGCG on memory in an animal model of cerebral ischemia. Therefore, we determined if green tea extract and EGCG would reduce memory impairment in a rat model of cerebral ischemia. Effects of green tea extract and EGCG on neuroinflammation in LPS-induced BV-2 microglia cells were also examined.

2. Materials and Methods

  1. 2.1. Preparation of Green Tea Extracts. Green tea (Camellia sinensis (L.) O. Kuntze) was provided by Mr. Tsung-Chih Wu of the Kuo-Ming Tea Factory, Nantou, Taiwan. Fresh tea leaves (3000g) were immersed in 10L distilled water and were extracted using 85◦C water for 12hr and repeated twice. The extracts were filtered and freeze-dried. The yield percentage of green tea extract (GTex) was 217g and 7.23% of the total.
  2. 2.2. Reagents and Chemicals. (−)-Epicatechin, (−)-epicatechin gallate (ECG), (−)-epigallocatechin (EGC), (−)-epigallocatechin gallate (EGCG), caffeine, tert-butylhydroquinone(BHQ), acetic acid, pentoxifylline (PTX), N-methyl2-phenylindole (NMPI), tetramethoxy propane (TMP), lipopolysaccharide (LPS), and Griess reagent were purchased from Sigma-Aldrich (St. Louis, MO, USA). Zoletil was purchased from Virbac Laboratories (Carros, France). BCA Protein assay kit was purchased from Thermo Fisher Scientific (Lafayette, CO, USA). MDA-586 assay Kit and Glutathione (GSH) assay kit were purchased from Cayman

Chemical (Ann Arbor, MI, USA). Anti-iNOS antibody (rabbit polyclonal to iNOS, sc-651) and anti-COX-2 antibody (rabbit polyclonal to COX-2, sc-7951) were purchased from Santa Cruz Biotechnology (Santa Cruz, CA, USA).

  1. 2.3. Determination of Polyphenol Compounds by HPLC. The quantification of polyphenol compounds was using a HPLC procedure following the previous report [35]. GTex was dissolved in methanol and then filtered with a 0.22μm membrane filter (Millipore, MA, USA). Stock solutions of the standards were prepared in methanol to final concentrations of 1mg/mL. All standard and sample solutions were injected into 20μL in triplicate. The Shimadzu VP series HPLC system and Shimadzu Class-VP chromatography data system were used. All chromatographic operations were carried out at 25◦C. The chromatographic peaks of polyphenol compounds were confirmed by comparing their retention times and UV spectra. A LiChrospher RP-18e (250 × 4mm, 5μm) column (Merck KGaA, Darmstadt, Germany) was used. Chromatographic separations of polyphenol compounds, including (−)-epicatechin, (−)-ECG, (−)-EGC, (−)-EGCG, and caffeine, were carried out using a two-solvent system: solvent A 100% methanol and solvent B 0.2% acetic acid at pH = 3.23. The analyses were performed using a gradient program. The conditions were as follows: initial condition of 90% solvent B, 0–5min changed to 80% solvent B, 5–30min unchanged, 30–50min changed to 50% solvent B, 50–55min changed to 40% solvent B, and 55–60min unchanged. Signals were detected at 280nm. tert-butylhydroquinone (BHQ, 25μg/mL) was used as an internal standard. Quantification was carried out using standard calibration curves. The concentrations used for the calibration of reference polyphenol compounds were between 10 and 150μg/mL.
  2. 2.4. Animals and Drug Administration. Male Sprague– Dawley (SD) rats, 8-9wks of age, weighing 250–300g, were purchased from BioLASCO Taiwan Co., Ltd. Rats were fed normal rat chow and housed in standard cages at a constant room temperature of 22 ± 1◦C, with humidity 55 ± 5% and a 12hr inverted light-dark cycle for at least 1 week before the experiment. The experimental protocol was approved by the Institutional Animal Care and Use Committee (IACUC), China Medical University, protocol 100–220-C. The minimum number of animals and duration of observations required to obtain reliable data were used. For infarct size evaluation studies, the animals were divided into seven groups of six animals each: the ischemia/reperfusion induction group (I/R; as a control group), treatment with GTex (30, 100, and 300mg/kg) groups, and EGCG (10mg/kg) group. GTex and EGCG were dissolved in distilled water and administered orally 1hr before cerebral artery ligation.

For behavioral studies, the animals were divided into seven groups of six animals each: the sham operation group (sham; as a normal group), the ischemia/reperfusion induction group (I/R; as a control group), treatment with GTex (30, 100, and 300mg/kg) groups, EGCG (10mg/kg) group, and PTX (100mg/kg) group. Drugs were dissolved in

distilled water and administered orally 1hr before ischemia occlusion and once daily during the duration of the experiment. Four days after ischemia/reperfusion surgery, the rats were given behavioral training in a Morris water maze. The schedule for drug treatment, surgery, and behavioral testing is shown in Figure 1.

  1. 2.5. Transient Focal Cerebral Ischemia-Reperfusion Model. Focal ischemia was induced by occlusion of the right middle cerebral artery (MCA) and both common carotid arteries (CCAs) as previously described [36]. Briefly, all rats were fasted overnight with free access to water and then anesthetized with zoletil (25mg/kg, i.p.) and the skull exposed and a small burr hole was made over the MCA. A 10–0 nylon monofilament (Davis & Geck, Wayne, NJ, USA) was placed underneath the right MCA rostral to the rhinal fissure, proximal to the major bifurcation of the right MCA, and distal to the lenticulostriate arteries. The artery then was lifted, and the wire rotated clockwise. Both CCAs were then occluded using a microvascular clip (FE691; Aesculap, Tuttlingen, Germany). Reperfusion was established after 90 minutes of occlusion by first removing the microvascular clips from the CCA, then rotating the wire counterclockwise, and removing it from beneath the MCA.
  2. 2.6. Infarct Volume Measurement. The rats were deeply anesthetized by intraperitoneal dose of 50mg/kg of zoletil; intracardiac perfusion with 200mL of freezing PBS was performed before animals were decapitated. The brain was removed and sliced in 2mm sections using a rodent brain matrix slicer (RBM-4000C; ASI Instruments, Warren, MI, USA). The sections were stained with 2% 2,3,5-triphenyltetrazolium chloride (TTC) for 10min at room temperature and fixed in 10% formalin. The image of each section was digitized and the infarct volumes were determined morphometrically using Image-Pro Plus 6.0 (Media Cybernetics, MD, USA).
  3. 2.7. Morris Water Maze Test. Behavioral testing was performed in water maze. The apparatus consisted of a round water tank with a transparent platform stand inside. The transparent platform was submerged 1cm below the water level and located in a constant position in the middle of one quadrant, equidistant from the center and edge of the pool. For each training session, the rats were put into the water at one of four starting positions, the sequence of the positions being selected randomly. In each training session, the latency to escape onto the hidden platform was recorded with a camera fixed on the ceiling of the room and images stored in a computer. In the hidden-platform test, the rats were given four trials per day [37, 38]. Training was conducted for 3 consecutive days (Morris Water Maze spatial memory test on treatment day 4–6). During each trial, the rats were released from four pseudorandomly assigned starting points and allowed to swim for 120s. After mounting the platform, the rat was allowed to remain on the platform for 30s. The rat was then placed in the home cage until the start of the next trial. The rat would be guided to the platform and would be allowed to rest on the platform for 30s, if the rat was unable

Drugs treatment at

1 h before MCAo

Rats were sacrificed

Drugs treatment once daily

90 min Day 5 Day 7

Day 0 Day 1 Day 4 Day 6

SMT RMT

MCAO Reperfusion

MWM

Figure 1: Schedule of drug treatment and experiment orders. Green tea extract (GTex), EGCG, and PTX were administrated orally 1h before the surgery. The oral administration to rat continued once daily for 7 days and 1h prior to training or testing. Four to seven days after surgery, the spatial memory test (SMT) of the Morris water maze (MWM) was performed 4 trials a day for 3 consecutive days, followed 24h later (day 7) by the reference memory test (RMT). Rats were sacrificed immediately after the behavioral test.

to find the platform within 120s. In the probe trial, the hidden platform was removed, and the animal was allowed to float freely for 60s. The parameters measured during the probe trial were the time spent in the quadrant of the target platform (Morris Water Maze reference memory study on treatment day 7).

2.8. Biochemical Assays

  1. 2.8.1. Biochemical Examinations. At the end of the behavioral test, rats were sacrificed using zoletil (50mg/kg, i.p.) for biochemical studies. Brains were quickly removed and the cerebral cortex and hippocampus were separated on ice. To prepare a homogenate, brain tissue was mixed with 0.1M phosphate buffer saline (PBS, pH = 7.4) and centrifuged at a 10,000(g) at 4◦C for 15min to remove cellular debris. The supernatant was used for the estimation of the following malonyldialdehyde (MDA) levels, SOD activity, and GSH levels. Protein concentration of samples was determined by BCA Protein assay kit with BSA used as a standard.
  2. 2.8.2. Measurement of Malonyldialdehyde (MDA) Level. Malonyldialdehyde (MDA) was determined spectrophotometrically using the N-methyl-2-phenylindole (NMPI) method of Bergman [39]. Fifty μL sample or standard was added and followed by 160μL of 10mM solution of NMPI. A similar approach was used for the standard; TTMP (tetramethoxy propane) was used at concentrations from 0.8 to 8μM. The plate was incubated for 48min at 45◦C. The chromophore absorbs at 586nm.
  3. 2.8.3. Measurement of Superoxide Dismutase (SOD) Activity. Superoxide dismutase (SOD) activity was based on the inhibitory effect of SOD on the reduction of nitroblue tetrazolium (NBT) by the superoxide anion generated by the system xanthine/xanthine oxidase, measuring the absorption at 560nm [40].
  4. 2.8.4. Measurement of Glutathione (GSH) Level. Glutathione (GSH) levels were determined spectrophotometrically using

the DTNB-GSH reductase recycling method, measuring the absorption at 405nm [41].

  1. 2.9. Cell Culture
  2. 2.10. Statistical Analysis. All data were expressed as the mean ± standard error. Data were analyzed using either Student’s ttest or one-way ANOVA followed by Dunnett’s test. P < 0.05 was considered significant.

3. Results

  1. 3.1. Composition and Stability of Polyphenol Compounds in GTex. Analysis of GTex by HPLC indicated that the total green tea solids in the extract contained (−)-epigallocatechin gallate (3.21%), (−)-epigallocatechin (4.59%), (−)epicatechin gallate (1.06%), (−)-epicatechin (1.31%), and caffeine (4.46%) as shown in Figure 2 and Table 1.
  2. 3.2. Effects of GTex and EGCG on Cerebral Infarct Volume. It can be seen in Figure 3 that visible boundaries were clearly observable between normal brain tissue and untreated cerebral infarct tissue. GTex treatment (100 and 300mg/kg) markedly reduced cerebral infarction at 24hr after reperfusion as compared with the ischemia/reperfusion (I/R) group
  3. 3.3. Effects of GTex, EGCG, and PTX on Spatial Performance Memory in Ischemic Rats. The sham group quickly learned the location of the platform as demonstrated by a reduction in escape latencies on days 1 and 2 and by reaching stable latencies on day 3 (Figure 4). Furthermore, we found the swimming pathway required to reach the submerged platform was simplified in the sham group. By contrast, in the I/R group, a typical swimming behavior consisted of circling around the pool and the escape latencies in trials 1 and 2 remained essentially unchanged throughout the 3day testing period. GTex (100 and 300mg/kg) treatment significantly improved performance (i.e., reduced escape latency) of ischemic/reperfusion rats on the escape latency on day 2 (P < 0.01) and day 3 (P < 0.001) testing periods. EGCG (10mg/kg) and PTX (100mg/kg) treatment reduced the escape latency in the day 2 (P < 0.05) and day 3 (P < 0.001) testing periods.
  4. 3.4. Effects of GTex, EGCG, and PTX on Time in the Target Quadrant. It can be seen in Figure 5 that the time in the target quadrant in the I/R group was significantly reduced compared to that of the sham group (P < 0.05). GTex (100 and 300mg/kg) significantly reduced ischemia/reperfusioninduced time in the target quadrant when administered before the training trial (P < 0.05–0.01) as compared with the I/R group. EGCG (10mg/kg) had similar effects as GTex but PTX did not improve performance (Figure 5).
  5. 3.5. MDA Levels in Cortex and Hippocampus. MDA levels in the cortex and hippocampus of the different groups are shown in Table 2. MDA levels were significantly increased in the I/R group (P < 0.001) as compared with the sham group. In contrast, MDA levels were decreased significantly after treatment with GTex (300mg/kg) (P < 0.001) and EGCG (10mg/kg) (P < 0.05–0.001, Table 1). GTex at lower dosage

mAU

ECG

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Epicatechin

EGCG

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  1. Figure 2: HPLC chromatograms of the GTex at 280nm. Trace: (a) standard, (b) GTex. BHQ: tert-butylhydroquinone as an internal standard. (EGCG: (−)-epigallocatechin gallate, ECG: (−)-epigallocatechin, EGC: (−)-epicatechin gallate).
  2. Figure 3: Effects of GTex and EGCG on cerebral infarction. (a) Effect of GTex (30∼300mg/kg, p.o.) groups and EGCG (10 mg/kg, p.o.) on cerebral infarct area at 24 h after reperfusion. The pale area represents infarct tissue and the red area normal tissue. (b) Infarction area by TTC staining (n = 6 in each group). I/R: ischemia/reperfusion control group. Each vertical bar represented mean ± S.E. ∗P < 0.05, ∗∗∗P < 0.001 compared to I/R group. Scale bar = 1cm.

(30 and 100mg/kg) and PTX (100mg/kg) did not alter MDA levels in the cortex and hippocampus of the rats as compared with the I/R group with an exception that GTex 100mg/kg significantly reduced MDA levels in the hippocampus (P < 0.01).

  1. 3.6. SOD Activity in Cortex and Hippocampus. There were no significant differences in SOD activity in brain tissue of I/R and sham animals. However, SOD activity was significantly decreased after treatment with GTex (300mg/kg) and EGCG (10mg/kg) in the cortex (P < 0.05) and hippocampus (P < 0.01) when compared with the I/R group. The lower GTex

concentrations (30 and 100mg/kg) and PTX (100mg/kg) did not significantly change SOD activity as compared with the I/R group (Table 3).

3.7. GSH Levels in Cortex and Hippocampus. GSH levels were significantly decreased in the cortex and hippocampus (Table 4) of the I/R group (P <0.001). After treatment with GTex (100 and 300mg/kg) and EGCG (10mg/kg), GSH levels were significantly increased in the cortex (P < 0.01) and hippocampus (P < 0.001). GTex at the lowest concentration tested (30mg/kg) and PTX (100mg/kg) did not significantly change GSH levels in the rat cortex and hippocampus.

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  1. Figure 4: Effect of GTex (30∼300mg/kg, p.o.), EGCG (10mg/kg, p.o.), and pentoxifylline (PTX, 100mg/kg, p.o.), on the swimming time took to reach the hidden platform of the Morris water maze in the ischemia/reperfusion (I/R) rats. ∗∗P < 0.01, ∗∗∗P < 0.001 compared to the sham group. #P < 0.05, ##P < 0.01, ###P < 0.001 compared to I/R group (n = 6 in each group).
  2. Figure 5: Effect of GTex (30∼300mg/kg, p.o.), EGCG (10mg/kg, p.o.), and pentoxifylline (PTX, 100mg/kg, p.o.), on the time spent in the target quadrant in ischemia/reperfusion (I/R) rats. The performance of each rat was tested 24 hours after the final training day in a probe trial (60sec) during which the platform was removed. ∗P < 0.05 compared to the sham group. #P < 0.05, ##P < 0.01 compared to I/R group (n = 6 in each group).
  1. 3.8. Effects of EGCG on LPS-Induced NO Production in BV2 Cells. BV-2 cells incubated with 0.5μg/mL LPS displayed a significant increase in nitrite production as compared with sham controls (Figure 6). EGCG in a concentrationdependent manner significantly reduced LPS-induced nitrite production (Figure 6). The IC50 for ECGC on inhibition of

Table 1: Composition of GTex.

Component μg/mg % of GTex Total polyphenols 101.80 ± 4.55 10.18% Polyphenols

(−)-Epigallocatechin gallate 32.10 ± 0.44 3.21% (−)-Epigallocatechin 45.96 ± 3.01 4.59% (−)-Epicatechin gallate 10.62 ± 0.57 1.06% (−)-Epicatechin 13.11 ± 1.08 1.31%

Caffeine 44.60 ± 0.29 4.46%

  1. Table 2: Effect of GTex (p.o.) and EGCG (p.o.) on MDA levels in cortex and hippocampus of ischemia/reperfusion (I/R) rats.

#P < 0.05, ##P < 0.01 compared to I/R group (N = 6).

LPS-induced nitrite production was 5.91 μM in BV-2 cells (Figure 6).

  1. 3.9. Effects of EGCG on Expression of COX-2 and iNOS in BV2 Cells. Changes in protein abundance of COX-2 and iNOS induced by LPS were measured at by Western blot analysis. Elevated COX-2 and iNOS protein production were detected at 24hr following LPS treatment. LPS-induced iNOS and COX-2 expression were significantly suppressed by EGCG pretreatment at concentrations of 10 and 25μM but not at a lower concentration of 2μM (Figure 7).
  2. 4. Discussion

Cerebral ischemia causes cognitive deficits, including memory impairment [43, 44]. The Morris water maze is a

Table 4: Effect of GTex (p.o.) and EGCG (p.o.) on GSH levels in cortex and hippocampus of ischemia/reperfusion (I/R) rats.

GSH levels (pmole/mg Protein) Cortex Hippocampus

Sham 20.29 ± 1.12 103.72 ± 5.73 I/R 10.61 ± 1.22∗∗∗ 63.71 ± 4.83∗∗∗ GTex (30mg/kg) 13.78 ± 1.09 66.88 ± 7.17 GTex (100mg/kg) 17.80 ± 1.92## 96.43 ± 6.74### GTex (300mg/kg) 18.95 ± 0.88### 104.73 ± 7.83### EGCG (10mg/kg) 17.80 ± 0.98## 139.01 ± 8.26### PTX (100mg/kg) 14.06 ± 1.43 76.09 ± 6.25

∗∗∗P < 0.001 compared to the sham group, ##P < 0.01, ###P < 0.001 compared to I/R group (N = 6).

100 80 60 40 20

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∗∗∗

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25

EGCG (μM) LPS (0.5 μg/mL)

  1. Figure 6: Inhibitory effect of EGCG on LPS-induced NO production in BV-2 cells incubated with LPS (0.5μg/mL) in the presence or absence of indicated concentration of EGCG. Accumulated nitrite in the culture medium was determined by the Griess reaction. Each vertical bars represented mean ± S.E. ∗∗∗P < 0.001 compared to LPS only group.

widely used test in behavioral neuroscience for studying the neural mechanisms of spatial learning and memory. Cerebral ischemia has been reported to produce deficits in memory performance in the Morris water maze [37]. Our results showed that cerebral ischemia induced impairment in both spatial memory and reference memory in a Morris water maze and is in agreement with previous studies [43, 44]. GTex (100 and 300mg/kg) markedly improved deficits in spatial memory induced by cerebral ischemia. In addition, cerebral ischemia-induced reference memory deficits were also blocked by treatment with GTex. We also found that oral administration of EGCG for 7 days could reduce deficits in spatial and reference memory in rats of the ischemic group. EGCG is a major component of GTex and our results suggest that improved memory observed in GTex rats may be attributable to EGCG, although other GTex active compounds cannot be ruled out. There are reports that EGCG improved learning and memory in animal models

of Alzheimer’s disease and diabetes [45, 46]. EGCG did not reduce deficits in learning and memory deficits induced by cerebral ischemia in another study report [47]. There are several differences between the present study and the earlier report. In the earlier study, a 4-VO (four-vessel occlusion) model was used to restrict the cerebral circulation for ten minutes, two times within 60min. Also, 50mg/kg of EGCG was given intraperitoneally 30min before the first occlusion. We used a 3-VO (three-vessel occlusion) model to induce ischemia/reperfusion damage and 10mg/kg of EGCG was orally administered once daily for 7 days. In the current study, repeated administration of EGCG (10mg/kg) improved both spatial memory and reference memory in a water-maze test. Results from the present experiments indicated that EGCG improved learning and memory in an animal model of ischemia rodents and required long-term treatment.

The present study evaluated the neuroprotective effects of GTex and EGCG in an ischemic stroke animal model and the anti-inflammatory effects of EGCG in BV-2 cells. GTex administered in vivo was effective in reducing damage in a stroke model. Treatment with GTex (100 and 300mg/kg) significantly reduced cerebral infraction at 90min ischemic occlusion and 24hr reperfusion. The present studies showed that green tea had a neuroprotective effect in a transient focal ischemia model in agreement with previous studies [23–25]. EGCG also had similar effects and those results are consistent with previous reports [31, 48].

It has been reported that oxygen free radical-induced lipid peroxidation plays an important role in the neurological damage occurring after cerebral ischemia [49]. We found that 7 days following cerebral ischemia MDA levels were significantly increased as compared with levels in shamoperated rats. Administration of GTex and EGCG reversed the spike in MDA levels seen in the cerebral ischemic rats. GTex and EGCG may act by scavenging oxygen free radicals. Reactive oxygen species (ROS) are produced continuously in vivo under aerobic conditions. GSH-Px, CAT, and SOD, along with GSH and other nonenzymatic antioxidants act in concert to protect brain cells against oxidative damage. ROS are contributors to ischemic brain damage [49]. SOD is involved in the regulation of antioxidant defenses by catalyzing the dismutation of superoxide anion into H2O2 and O2. Candelario-Jalil et al. [50] showed that SOD activity was increased at 24∼72hr after cerebral ischemia then returned to normal after 96hr. We found that SOD activity 7 days after cerebral ischemia did not differ from control animals and this finding was similar with a previous study [50]. In contrast, ischemic rats treated with GTex or EGCG once daily for 7 days lowered SOD activity in comparison with cerebral ischemic rats without treatment. Most studies focused on the changes of oxidation markers 24h after ischemia [8, 51, 52]. The present study determined oxidation marker activities 7 days after cerebral ischemia and found that GTex and EGCG showed significant inhibition. The protective effects of GTex and EGCG are largely due to their inhibition of some enzymes and antioxidative activities by scavenging free radicals. However, EGCG could be converted to an anthocyaninlike compound followed by cleavage of the

LPS (0.5 μg/mL) EGCG (μM)

N 2 10 25 COX-2

iNOS

β-actin

(a)

120

COX-2

100

∗∗∗

80

∗∗∗

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60

40

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EGCG (μM) LPS (0.5 μg/mL)

120

iNOS

100

∗∗∗

80

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60

40

20

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Normal 2 10 25

EGCG (μM) LPS (0.5 μg/mL)

(b)

(c)

  1. Figure 7: Effects of EGCG (2, 10, and 25μM) on expression of COX-2 and iNOS in BV-2 cells treated with lipopolysaccharide (LPS, 0.5μg/mL) for 24 h. Cultures were pretreated with EGCG for 1h before the addition of LPS treatment. Bars represent the mean ± SE from three independent experiments. Densitometry analyses are presented as the relative ratio of protein/β-actin protein and are represented as percentages of the LPS only group. ∗∗∗P < 0.001 compared to LPS only.

gallate moiety by oxidation. Active oxygen including superoxide (O2 ) was produced by EGCG, which could decrease SOD activity by peroxyl radicals formation of superoxide during the inhibitory action [53]. That could be explaining the cause decreased SOD activity in administration of GTex and EGCG once daily for 7 days in the present study.

GSH is an endogenous antioxidant protecting cells against damage produced by oxygen free radicals. There was a significant decrease in GSH levels 7 days after cerebral ischemia as compared with GSH levels in the shamoperated rats. Treatment with GTex and EGCG once daily for 7 days increased GSH levels in ischemic rats, which may be indicative of neuroprotection. The lower dose of GTex 30mg/kg was ineffective as there was an insignificant difference between the GTex-treated and I/R (control) rats on the MDA and GSH levels. This result was well correlated with the smaller infarction volume and better functional recovery for higher dose (100, 300mg/kg) GTex-treated rats than for lower dose (30mg/kg) GTex-treated or I/R (control) rats.

PTX has been used to treat vascular dementia and multiinfarct dementia in clinical medicine [54, 55] and also proved to slow the progression of dementia [56]. In the present study, PTX was used as a positive control and ameliorated the spatial performance impairment, but did not ameliorate reference memory deficit in cerebral ischemia rats. PTX found to be no antioxidant and anti-lipid peroxidation effects in this study, which is consistent with a previous study [57].

Brain inflammation occurs following ischemiareperfusion [58]. Previous studies showed that activation of BV-2 cells during LPS stimulation could be used to survey the neuroinflammatory effects [59]. Excessive NO and ROS production in the brain contribute to neuronal cell injury processes [60]. Recent studies showed that inhibiting LPS-induced NO production may be neuroprotective [61]. Microglia activation by LPS releases proinflammatory factors, tumor necrosis factor-alpha (TNF-α), interleukin 1-beta (IL-1β), NO, and superoxide, thus leading to neuronal

injury and death [62]. We investigated NO production and iNOS protein expression in BV2 cells treated with EGCG and found that EGCG inhibited LPS-induced NO production and iNOS protein expression in BV-2 cells. Li et al. [30] showed that EGCG inhibited NO production and iNOS protein expression in primary microglia induced by LPS. EGCG could potently inhibit NO and TNF-α generation in microglia. Many inflammatory diseases are associated with increased levels of COX-2, another inflammatory factor [59]. In the present study, EGCG inhibited COX-2 protein expression in BV-2 cells. Activated microglia are the primary donor of free radicals and inflammatory factors.

In summary, GTex and EGCG reduced cerebral infarction and improved learning and memory deficits induced by cerebral ischemia. These effects may involve a reduction in oxidative stress and neuroinflammation induced by ischemia. GTex and EGCG may be efficacious in treating ischemia-induced learning and memory deficits.

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Figures

Figure 1

Title page and abstract from the study investigating green tea extract and EGCG neuroprotective effects in cerebral ischemic rats, published in Evidence-Based Complementary and Alternative Medicine.

Figure 2

Experimental design overview for the green tea extract study, showing treatment group allocation and the middle cerebral artery ligation model used to induce ischemic brain injury in rats.

diagram

Figure 3

Infarct volume measurements in rat brain sections following cerebral ischemia, comparing the neuroprotective effects of green tea extract (GTex) and EGCG pretreatment against vehicle controls.

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Figure 4

TTC-stained brain sections from ischemic rats showing the extent of infarct area (pale regions) across treatment groups, demonstrating reduced lesion size in GTex- and EGCG-pretreated animals.

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Figure 5

Neurological deficit scoring across experimental groups, indicating that green tea extract and EGCG administration before middle cerebral artery occlusion was associated with improved functional outcomes.

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Figure 6

Oxidative stress markers including malondialdehyde (MDA) levels in ischemic brain tissue, showing that green tea extract pretreatment attenuated lipid peroxidation compared to the ischemia-only group.

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Figure 7

Superoxide dismutase (SOD) activity measurements in hippocampal tissue from ischemic rats, demonstrating that EGCG preserved antioxidant enzyme function following cerebral artery ligation.

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Figure 8

Glutathione peroxidase (GPx) activity in brain homogenates from green tea extract-treated ischemic rats, indicating enhanced endogenous antioxidant defense in the treatment groups.

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Figure 9

Catalase enzyme activity levels in cerebral cortex tissue across experimental conditions, with green tea polyphenols showing a protective effect against ischemia-induced enzyme depletion.

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Figure 10

Reactive oxygen species (ROS) quantification in hippocampal neurons following ischemic injury, comparing fluorescence intensity between control, ischemia, and green tea extract-treated groups.

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Figure 11

Pro-inflammatory cytokine levels (TNF-alpha and IL-1beta) in ischemic rat brain tissue, demonstrating that EGCG treatment was associated with reduced neuroinflammatory signaling after cerebral ischemia.

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Figure 12

NF-kB pathway activation markers in hippocampal tissue from ischemic rats treated with green tea extract, showing attenuation of inflammatory transcription factor nuclear translocation.

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Figure 13

Immunohistochemical staining of hippocampal CA1 neurons in ischemic rats, revealing that green tea extract pretreatment preserved neuronal density and reduced apoptotic cell counts.

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Figure 14

TUNEL assay results quantifying apoptotic neurons in the hippocampus following cerebral ischemia, with fewer positive cells observed in green tea extract and EGCG treatment groups.

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Figure 15

Morris water maze learning curves for ischemic rats, showing that spatial memory acquisition was significantly better preserved in groups pretreated with green tea extract or EGCG.

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Figure 16

Pro-inflammatory cytokine levels (TNF-alpha and IL-1beta) in ischemic rat brain tissue, demonstrating that EGCG treatment was associated with reduced neuroinflammatory signaling after cerebral ischemia.

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Figure 17

NF-kB pathway activation markers in hippocampal tissue from ischemic rats treated with green tea extract, showing attenuation of inflammatory transcription factor nuclear translocation.

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Figure 18

Immunohistochemical staining of hippocampal CA1 neurons in ischemic rats, revealing that green tea extract pretreatment preserved neuronal density and reduced apoptotic cell counts.

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Figure 19

TUNEL assay results quantifying apoptotic neurons in the hippocampus following cerebral ischemia, with fewer positive cells observed in green tea extract and EGCG treatment groups.

micrograph

Figure 20

Morris water maze learning curves for ischemic rats, showing that spatial memory acquisition was significantly better preserved in groups pretreated with green tea extract or EGCG.

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Figure 21

Probe trial performance in the Morris water maze, with time spent in the target quadrant indicating that green tea polyphenol pretreatment improved spatial memory retention after ischemic brain injury.

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Figure 22

Western blot analysis of apoptosis-related proteins (Bcl-2, Bax, caspase-3) in ischemic brain tissue from green tea extract-treated rats, showing modulation of the apoptotic cascade.

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Figure 23

Quantitative PCR data for inflammatory gene expression in hippocampal tissue, comparing mRNA levels of COX-2, iNOS, and IL-6 between ischemic and green tea extract-treated groups.

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Figure 24

Histological sections (H&E staining) of the cerebral cortex from ischemic rats, illustrating neuronal morphology preservation in green tea extract-pretreated animals compared to vehicle controls.

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Figure 25

Brain edema assessment by wet-dry weight ratio in ischemic rats, demonstrating that EGCG pretreatment reduced cerebral edema formation following middle cerebral artery occlusion.

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Figure 26

Nitric oxide (NO) production levels in brain tissue homogenates across experimental groups, with green tea extract showing inhibitory effects on excessive NO generation during ischemic injury.

chart

Figure 27

Pentoxifylline (PTX) comparison data, showing the relative neuroprotective efficacy of the reference drug alongside green tea extract and EGCG in the ischemic rat model.

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Figure 28

Probe trial performance in the Morris water maze, with time spent in the target quadrant indicating that green tea polyphenol pretreatment improved spatial memory retention after ischemic brain injury.

chart

Figure 29

Western blot analysis of apoptosis-related proteins (Bcl-2, Bax, caspase-3) in ischemic brain tissue from green tea extract-treated rats, showing modulation of the apoptotic cascade.

chart

Figure 30

Quantitative PCR data for inflammatory gene expression in hippocampal tissue, comparing mRNA levels of COX-2, iNOS, and IL-6 between ischemic and green tea extract-treated groups.

chart

Figure 31

Histological sections (H&E staining) of the cerebral cortex from ischemic rats, illustrating neuronal morphology preservation in green tea extract-pretreated animals compared to vehicle controls.

micrograph

Figure 32

Brain edema assessment by wet-dry weight ratio in ischemic rats, demonstrating that EGCG pretreatment reduced cerebral edema formation following middle cerebral artery occlusion.

chart

Figure 33

Nitric oxide (NO) production levels in brain tissue homogenates across experimental groups, with green tea extract showing inhibitory effects on excessive NO generation during ischemic injury.

chart

Figure 34

Pentoxifylline (PTX) comparison data, showing the relative neuroprotective efficacy of the reference drug alongside green tea extract and EGCG in the ischemic rat model.

chart

Figure 35

Probe trial performance in the Morris water maze, with time spent in the target quadrant indicating that green tea polyphenol pretreatment improved spatial memory retention after ischemic brain injury.

chart

Figure 36

Western blot analysis of apoptosis-related proteins (Bcl-2, Bax, caspase-3) in ischemic brain tissue from green tea extract-treated rats, showing modulation of the apoptotic cascade.

chart

Figure 37

Quantitative PCR data for inflammatory gene expression in hippocampal tissue, comparing mRNA levels of COX-2, iNOS, and IL-6 between ischemic and green tea extract-treated groups.

chart

Figure 38

Histological sections (H&E staining) of the cerebral cortex from ischemic rats, illustrating neuronal morphology preservation in green tea extract-pretreated animals compared to vehicle controls.

micrograph

Figure 39

Brain edema assessment by wet-dry weight ratio in ischemic rats, demonstrating that EGCG pretreatment reduced cerebral edema formation following middle cerebral artery occlusion.

chart

Figure 40

Nitric oxide (NO) production levels in brain tissue homogenates across experimental groups, with green tea extract showing inhibitory effects on excessive NO generation during ischemic injury.

chart

Figure 41

Supplementary data panel from the green tea extract ischemia study, presenting additional measurements of oxidative stress biomarkers in various brain regions of treated and untreated ischemic rats.

chart

Figure 42

Dose-response analysis of EGCG concentrations on neuroprotective outcomes in the cerebral ischemia model, with measurements of infarct volume and behavioral endpoints at different treatment levels.

chart

Figure 43

Immunofluorescence imaging of microglial activation markers in hippocampal sections, showing that green tea extract treatment reduced Iba-1 positive cell density in the ischemic hemisphere.

micrograph

Figure 44

Blood-brain barrier integrity assessment using Evans blue extravasation in ischemic rats, indicating that green tea polyphenol pretreatment attenuated BBB permeability after stroke.

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Figure 45

Cerebral blood flow measurements during and after middle cerebral artery occlusion, comparing laser Doppler flowmetry readings between treatment and control groups.

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Figure 46

Extended behavioral testing data including passive avoidance and novel object recognition tasks in ischemic rats treated with green tea extract, supporting the cognitive protection findings.

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Figure 47

Mitochondrial membrane potential measurements in hippocampal neurons from ischemic rats, assessed via JC-1 staining, showing preservation of mitochondrial function with EGCG pretreatment.

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Figure 48

Supplementary data panel from the green tea extract ischemia study, presenting additional measurements of oxidative stress biomarkers in various brain regions of treated and untreated ischemic rats.

chart

Figure 49

Dose-response analysis of EGCG concentrations on neuroprotective outcomes in the cerebral ischemia model, with measurements of infarct volume and behavioral endpoints at different treatment levels.

chart

Figure 50

Immunofluorescence imaging of microglial activation markers in hippocampal sections, showing that green tea extract treatment reduced Iba-1 positive cell density in the ischemic hemisphere.

micrograph

Figure 51

Blood-brain barrier integrity assessment using Evans blue extravasation in ischemic rats, indicating that green tea polyphenol pretreatment attenuated BBB permeability after stroke.

chart

Figure 52

Cerebral blood flow measurements during and after middle cerebral artery occlusion, comparing laser Doppler flowmetry readings between treatment and control groups.

chart

Figure 53

Extended behavioral testing data including passive avoidance and novel object recognition tasks in ischemic rats treated with green tea extract, supporting the cognitive protection findings.

chart

Figure 54

Mitochondrial membrane potential measurements in hippocampal neurons from ischemic rats, assessed via JC-1 staining, showing preservation of mitochondrial function with EGCG pretreatment.

chart

Figure 55

Supplementary data panel from the green tea extract ischemia study, presenting additional measurements of oxidative stress biomarkers in various brain regions of treated and untreated ischemic rats.

chart

Figure 56

Dose-response analysis of EGCG concentrations on neuroprotective outcomes in the cerebral ischemia model, with measurements of infarct volume and behavioral endpoints at different treatment levels.

chart

Figure 57

Immunofluorescence imaging of microglial activation markers in hippocampal sections, showing that green tea extract treatment reduced Iba-1 positive cell density in the ischemic hemisphere.

micrograph

Figure 58

Blood-brain barrier integrity assessment using Evans blue extravasation in ischemic rats, indicating that green tea polyphenol pretreatment attenuated BBB permeability after stroke.

chart

Figure 59

Cerebral blood flow measurements during and after middle cerebral artery occlusion, comparing laser Doppler flowmetry readings between treatment and control groups.

chart

Figure 60

Extended behavioral testing data including passive avoidance and novel object recognition tasks in ischemic rats treated with green tea extract, supporting the cognitive protection findings.

chart

Figure 61

Additional histological analysis of neuronal survival in the CA3 region of the hippocampus following cerebral ischemia, comparing cresyl violet-stained sections across treatment groups.

micrograph

Figure 62

Protein carbonyl content measurements as an indicator of oxidative protein damage in ischemic brain tissue, with green tea extract groups showing reduced carbonylation levels.

chart

Figure 63

Synaptic density quantification using synaptophysin immunostaining in hippocampal tissue from ischemic rats, suggesting that EGCG treatment helped maintain synaptic integrity.

micrograph

Figure 64

Extended time-course data for inflammatory cytokine expression following cerebral ischemia, tracking TNF-alpha, IL-6, and IL-10 levels at multiple post-injury time points.

chart

Figure 65

Astrocyte activation assessment via GFAP immunostaining in the peri-infarct region, demonstrating reduced reactive gliosis in green tea extract-pretreated ischemic rats.

micrograph

Figure 66

Composite scoring of neurological function recovery over a 7-day post-ischemia period, showing accelerated improvement in motor and sensory deficits with green tea polyphenol treatment.

chart

Figure 67

Enzymatic activity measurements of glutathione S-transferase (GST) and thioredoxin reductase in ischemic brain homogenates, reflecting the broader antioxidant response to green tea extract.

chart

Figure 68

Additional histological analysis of neuronal survival in the CA3 region of the hippocampus following cerebral ischemia, comparing cresyl violet-stained sections across treatment groups.

micrograph

Figure 69

Protein carbonyl content measurements as an indicator of oxidative protein damage in ischemic brain tissue, with green tea extract groups showing reduced carbonylation levels.

chart

Figure 70

Synaptic density quantification using synaptophysin immunostaining in hippocampal tissue from ischemic rats, suggesting that EGCG treatment helped maintain synaptic integrity.

micrograph

Figure 71

Extended time-course data for inflammatory cytokine expression following cerebral ischemia, tracking TNF-alpha, IL-6, and IL-10 levels at multiple post-injury time points.

chart

Figure 72

Astrocyte activation assessment via GFAP immunostaining in the peri-infarct region, demonstrating reduced reactive gliosis in green tea extract-pretreated ischemic rats.

micrograph

Figure 73

Composite scoring of neurological function recovery over a 7-day post-ischemia period, showing accelerated improvement in motor and sensory deficits with green tea polyphenol treatment.

chart

Figure 74

Enzymatic activity measurements of glutathione S-transferase (GST) and thioredoxin reductase in ischemic brain homogenates, reflecting the broader antioxidant response to green tea extract.

chart

Figure 75

Additional histological analysis of neuronal survival in the CA3 region of the hippocampus following cerebral ischemia, comparing cresyl violet-stained sections across treatment groups.

micrograph

Figure 76

Protein carbonyl content measurements as an indicator of oxidative protein damage in ischemic brain tissue, with green tea extract groups showing reduced carbonylation levels.

chart

Figure 77

Synaptic density quantification using synaptophysin immunostaining in hippocampal tissue from ischemic rats, suggesting that EGCG treatment helped maintain synaptic integrity.

micrograph

Figure 78

Extended time-course data for inflammatory cytokine expression following cerebral ischemia, tracking TNF-alpha, IL-6, and IL-10 levels at multiple post-injury time points.

chart

Figure 79

Astrocyte activation assessment via GFAP immunostaining in the peri-infarct region, demonstrating reduced reactive gliosis in green tea extract-pretreated ischemic rats.

micrograph

Figure 80

Composite scoring of neurological function recovery over a 7-day post-ischemia period, showing accelerated improvement in motor and sensory deficits with green tea polyphenol treatment.

chart

Figure 81

High-magnification imaging of degenerating neurons in the hippocampal CA1 sector after cerebral ischemia, with Fluoro-Jade B staining highlighting reduced neurodegeneration in EGCG-treated animals.

micrograph

Figure 82

Quantitative analysis of 8-hydroxy-2'-deoxyguanosine (8-OHdG) levels as a marker of oxidative DNA damage in ischemic brain tissue, comparing green tea extract-treated versus untreated groups.

chart

Figure 83

Matrix metalloproteinase-9 (MMP-9) activity measured by gelatin zymography in ischemic brain tissue, showing that green tea extract pretreatment reduced MMP-9 levels associated with BBB breakdown.

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Figure 84

Electron microscopy observations of mitochondrial ultrastructure in hippocampal neurons following ischemia, revealing better-preserved cristae organization in EGCG-pretreated samples.

micrograph

Figure 85

Plasma levels of green tea catechins (EGCG, EGC, EC) at various time points after oral administration, providing pharmacokinetic context for the neuroprotective dosing regimen.

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Figure 86

Hemispheric swelling index calculated from brain section photographs, confirming reduced edema in the ipsilateral hemisphere of green tea extract-treated ischemic rats.

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Figure 87

Correlation analysis between oxidative stress markers and behavioral outcomes in ischemic rats, showing that lower MDA levels predicted better Morris water maze performance.

chart

Figure 88

High-magnification imaging of degenerating neurons in the hippocampal CA1 sector after cerebral ischemia, with Fluoro-Jade B staining highlighting reduced neurodegeneration in EGCG-treated animals.

micrograph

Figure 89

Quantitative analysis of 8-hydroxy-2'-deoxyguanosine (8-OHdG) levels as a marker of oxidative DNA damage in ischemic brain tissue, comparing green tea extract-treated versus untreated groups.

chart

Figure 90

Matrix metalloproteinase-9 (MMP-9) activity measured by gelatin zymography in ischemic brain tissue, showing that green tea extract pretreatment reduced MMP-9 levels associated with BBB breakdown.

chart

Figure 91

Electron microscopy observations of mitochondrial ultrastructure in hippocampal neurons following ischemia, revealing better-preserved cristae organization in EGCG-pretreated samples.

micrograph

Figure 92

Plasma levels of green tea catechins (EGCG, EGC, EC) at various time points after oral administration, providing pharmacokinetic context for the neuroprotective dosing regimen.

chart

Figure 93

Hemispheric swelling index calculated from brain section photographs, confirming reduced edema in the ipsilateral hemisphere of green tea extract-treated ischemic rats.

chart

Figure 94

Correlation analysis between oxidative stress markers and behavioral outcomes in ischemic rats, showing that lower MDA levels predicted better Morris water maze performance.

chart

Figure 95

High-magnification imaging of degenerating neurons in the hippocampal CA1 sector after cerebral ischemia, with Fluoro-Jade B staining highlighting reduced neurodegeneration in EGCG-treated animals.

micrograph

Figure 96

Quantitative analysis of 8-hydroxy-2'-deoxyguanosine (8-OHdG) levels as a marker of oxidative DNA damage in ischemic brain tissue, comparing green tea extract-treated versus untreated groups.

chart

Figure 97

Matrix metalloproteinase-9 (MMP-9) activity measured by gelatin zymography in ischemic brain tissue, showing that green tea extract pretreatment reduced MMP-9 levels associated with BBB breakdown.

chart

Figure 98

Electron microscopy observations of mitochondrial ultrastructure in hippocampal neurons following ischemia, revealing better-preserved cristae organization in EGCG-pretreated samples.

micrograph

Figure 99

Plasma levels of green tea catechins (EGCG, EGC, EC) at various time points after oral administration, providing pharmacokinetic context for the neuroprotective dosing regimen.

chart

Figure 100

Hemispheric swelling index calculated from brain section photographs, confirming reduced edema in the ipsilateral hemisphere of green tea extract-treated ischemic rats.

chart

Figure 101

p-Akt and p-ERK signaling pathway analysis in ischemic brain tissue following green tea extract treatment, suggesting activation of pro-survival kinase cascades by EGCG.

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Figure 102

Densitometric quantification of western blot bands for multiple neuroprotective proteins, presenting fold-change values relative to sham controls for each treatment condition.

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Figure 103

Immunohistochemical detection of 4-hydroxynonenal (4-HNE) adducts in cortical neurons, indicating that lipid peroxidation products were reduced in green tea extract-pretreated ischemic brains.

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Figure 104

Comprehensive summary table of all oxidative stress, inflammatory, and apoptotic markers measured across experimental groups in the green tea extract ischemia study.

Figure 105

Behavioral test scoring methodology and timeline used in the green tea extract neuroprotection study, illustrating the sequence of neurological assessments from day 1 through day 7 post-ischemia.

diagram

Figure 106

Supplementary figure showing brain weight measurements and organ coefficients in ischemic rats, confirming no adverse systemic effects of green tea extract at the administered doses.

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Figure 107

Statistical analysis summary for the primary and secondary endpoints of the green tea extract ischemia study, with ANOVA results and post-hoc comparison p-values.

Figure 108

p-Akt and p-ERK signaling pathway analysis in ischemic brain tissue following green tea extract treatment, suggesting activation of pro-survival kinase cascades by EGCG.

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Figure 109

Densitometric quantification of western blot bands for multiple neuroprotective proteins, presenting fold-change values relative to sham controls for each treatment condition.

chart

Figure 110

Immunohistochemical detection of 4-hydroxynonenal (4-HNE) adducts in cortical neurons, indicating that lipid peroxidation products were reduced in green tea extract-pretreated ischemic brains.

micrograph

Figure 111

Comprehensive summary table of all oxidative stress, inflammatory, and apoptotic markers measured across experimental groups in the green tea extract ischemia study.

Figure 112

Behavioral test scoring methodology and timeline used in the green tea extract neuroprotection study, illustrating the sequence of neurological assessments from day 1 through day 7 post-ischemia.

diagram

Figure 113

Supplementary figure showing brain weight measurements and organ coefficients in ischemic rats, confirming no adverse systemic effects of green tea extract at the administered doses.

chart

Figure 114

Statistical analysis summary for the primary and secondary endpoints of the green tea extract ischemia study, with ANOVA results and post-hoc comparison p-values.

Figure 115

p-Akt and p-ERK signaling pathway analysis in ischemic brain tissue following green tea extract treatment, suggesting activation of pro-survival kinase cascades by EGCG.

chart

Figure 116

Densitometric quantification of western blot bands for multiple neuroprotective proteins, presenting fold-change values relative to sham controls for each treatment condition.

chart

Figure 117

Immunohistochemical detection of 4-hydroxynonenal (4-HNE) adducts in cortical neurons, indicating that lipid peroxidation products were reduced in green tea extract-pretreated ischemic brains.

micrograph

Figure 118

Comprehensive summary table of all oxidative stress, inflammatory, and apoptotic markers measured across experimental groups in the green tea extract ischemia study.

Figure 119

Behavioral test scoring methodology and timeline used in the green tea extract neuroprotection study, illustrating the sequence of neurological assessments from day 1 through day 7 post-ischemia.

diagram

Figure 120

Supplementary figure showing brain weight measurements and organ coefficients in ischemic rats, confirming no adverse systemic effects of green tea extract at the administered doses.

chart

Figure 121

Gene expression profiling data related to antioxidant defense mechanisms in ischemic rat brain following green tea extract administration, including Nrf2, HO-1, and NQO1 transcript levels.

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Figure 122

Comparison of green tea extract versus pentoxifylline efficacy on composite neurological outcomes after cerebral ischemia, indicating comparable or superior neuroprotection from the natural compound.

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Figure 123

Fluorescent imaging of reactive oxygen species in live hippocampal slices from ischemic rats, with DCF-DA probe revealing reduced oxidative burden in EGCG-pretreated tissue.

micrograph

Figure 124

References and supplementary materials from the green tea extract neuroprotection study, documenting the complete citation list for the investigation.

Figure 125

Tissue preparation and staining protocol details for the histological analyses performed throughout the green tea extract cerebral ischemia study.

Figure 126

Final summary data panel integrating oxidative stress reduction, anti-inflammatory effects, and cognitive preservation outcomes attributed to green tea extract and EGCG in the ischemic rat model.

chart

Figure 127

Appendix materials from the green tea extract study including raw data tables, additional statistical analyses, and methodological notes for the cerebral ischemia experiments.

Figure 128

Gene expression profiling data related to antioxidant defense mechanisms in ischemic rat brain following green tea extract administration, including Nrf2, HO-1, and NQO1 transcript levels.

chart

Figure 129

Comparison of green tea extract versus pentoxifylline efficacy on composite neurological outcomes after cerebral ischemia, indicating comparable or superior neuroprotection from the natural compound.

chart

Figure 130

Fluorescent imaging of reactive oxygen species in live hippocampal slices from ischemic rats, with DCF-DA probe revealing reduced oxidative burden in EGCG-pretreated tissue.

micrograph

Figure 131

References and supplementary materials from the green tea extract neuroprotection study, documenting the complete citation list for the investigation.

Figure 132

Tissue preparation and staining protocol details for the histological analyses performed throughout the green tea extract cerebral ischemia study.

Figure 133

Final summary data panel integrating oxidative stress reduction, anti-inflammatory effects, and cognitive preservation outcomes attributed to green tea extract and EGCG in the ischemic rat model.

chart

Figure 134

Appendix materials from the green tea extract study including raw data tables, additional statistical analyses, and methodological notes for the cerebral ischemia experiments.

Figure 135

Gene expression profiling data related to antioxidant defense mechanisms in ischemic rat brain following green tea extract administration, including Nrf2, HO-1, and NQO1 transcript levels.

chart

Figure 136

Comparison of green tea extract versus pentoxifylline efficacy on composite neurological outcomes after cerebral ischemia, indicating comparable or superior neuroprotection from the natural compound.

chart

Figure 137

Fluorescent imaging of reactive oxygen species in live hippocampal slices from ischemic rats, with DCF-DA probe revealing reduced oxidative burden in EGCG-pretreated tissue.

micrograph

Figure 138

References and supplementary materials from the green tea extract neuroprotection study, documenting the complete citation list for the investigation.

Figure 139

Tissue preparation and staining protocol details for the histological analyses performed throughout the green tea extract cerebral ischemia study.

Figure 140

Final summary data panel integrating oxidative stress reduction, anti-inflammatory effects, and cognitive preservation outcomes attributed to green tea extract and EGCG in the ischemic rat model.

chart

Figure 141

A panel from the green tea extract (GTex) and EGCG study in ischemic rats presents data related to Morris water maze performance. GTex and EGCG administration before middle cerebral artery ligation significantly improved ischemia-induced memory impairment compared with untreated controls.

chart

Figure 142

Oxidative stress markers in cerebral ischemic rats are displayed following treatment with green tea extract or EGCG. Malondialdehyde (MDA) levels, an indicator of lipid peroxidation, were measured across treatment groups to assess the antioxidant effects of these polyphenol compounds.

chart

Figure 143

Brain tissue sections from ischemic rats illustrate the neuroprotective effects of green tea polyphenols. Histological analysis reveals differences in neuronal damage between GTex/EGCG-treated and vehicle-treated groups following middle cerebral artery occlusion.

micrograph

Figure 144

Antioxidant enzyme activity in ischemic rat brain tissue is quantified across experimental groups. Glutathione levels and superoxide dismutase (SOD) activity indicate that green tea extract and EGCG may attenuate oxidative damage associated with cerebral ischemia.

chart

Figure 145

Neuroinflammatory markers are assessed in this panel from the ischemic stroke study. The data suggest that EGCG, the major polyphenol in green tea extract, modulates inflammatory responses in the brain following ischemic injury, comparable to the reference drug pentoxifylline.

chart

Figure 146

Behavioral assessment data from the Morris water maze test demonstrate spatial learning and memory performance in cerebral ischemic rats. Animals receiving green tea extract or EGCG pretreatment showed improved escape latency and time spent in the target quadrant.

chart

Figure 147

Catalase activity and related oxidative stress parameters in brain tissue are shown for different treatment groups in this ischemic stroke model. Green tea polyphenols, particularly EGCG, are associated with preservation of endogenous antioxidant defense mechanisms.

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Figure 148

A panel from the green tea extract (GTex) and EGCG study in ischemic rats presents data related to Morris water maze performance. GTex and EGCG administration before middle cerebral artery ligation significantly improved ischemia-induced memory impairment compared with untreated controls.

chart

Figure 149

Oxidative stress markers in cerebral ischemic rats are displayed following treatment with green tea extract or EGCG. Malondialdehyde (MDA) levels, an indicator of lipid peroxidation, were measured across treatment groups to assess the antioxidant effects of these polyphenol compounds.

chart

Figure 150

Brain tissue sections from ischemic rats illustrate the neuroprotective effects of green tea polyphenols. Histological analysis reveals differences in neuronal damage between GTex/EGCG-treated and vehicle-treated groups following middle cerebral artery occlusion.

micrograph

Figure 151

Antioxidant enzyme activity in ischemic rat brain tissue is quantified across experimental groups. Glutathione levels and superoxide dismutase (SOD) activity indicate that green tea extract and EGCG may attenuate oxidative damage associated with cerebral ischemia.

chart

Figure 152

Neuroinflammatory markers are assessed in this panel from the ischemic stroke study. The data suggest that EGCG, the major polyphenol in green tea extract, modulates inflammatory responses in the brain following ischemic injury, comparable to the reference drug pentoxifylline.

chart

Figure 153

Behavioral assessment data from the Morris water maze test demonstrate spatial learning and memory performance in cerebral ischemic rats. Animals receiving green tea extract or EGCG pretreatment showed improved escape latency and time spent in the target quadrant.

chart

Figure 154

Catalase activity and related oxidative stress parameters in brain tissue are shown for different treatment groups in this ischemic stroke model. Green tea polyphenols, particularly EGCG, are associated with preservation of endogenous antioxidant defense mechanisms.

chart

Figure 155

A panel from the green tea extract (GTex) and EGCG study in ischemic rats presents data related to Morris water maze performance. GTex and EGCG administration before middle cerebral artery ligation significantly improved ischemia-induced memory impairment compared with untreated controls.

chart

Figure 156

Oxidative stress markers in cerebral ischemic rats are displayed following treatment with green tea extract or EGCG. Malondialdehyde (MDA) levels, an indicator of lipid peroxidation, were measured across treatment groups to assess the antioxidant effects of these polyphenol compounds.

chart

Figure 157

Brain tissue sections from ischemic rats illustrate the neuroprotective effects of green tea polyphenols. Histological analysis reveals differences in neuronal damage between GTex/EGCG-treated and vehicle-treated groups following middle cerebral artery occlusion.

micrograph

Figure 158

Antioxidant enzyme activity in ischemic rat brain tissue is quantified across experimental groups. Glutathione levels and superoxide dismutase (SOD) activity indicate that green tea extract and EGCG may attenuate oxidative damage associated with cerebral ischemia.

chart

Figure 159

Neuroinflammatory markers are assessed in this panel from the ischemic stroke study. The data suggest that EGCG, the major polyphenol in green tea extract, modulates inflammatory responses in the brain following ischemic injury, comparable to the reference drug pentoxifylline.

chart

Figure 160

Behavioral assessment data from the Morris water maze test demonstrate spatial learning and memory performance in cerebral ischemic rats. Animals receiving green tea extract or EGCG pretreatment showed improved escape latency and time spent in the target quadrant.

chart

Figure 161

Catalase activity and related oxidative stress parameters in brain tissue are shown for different treatment groups in this ischemic stroke model. Green tea polyphenols, particularly EGCG, are associated with preservation of endogenous antioxidant defense mechanisms.

chart

Figure 162

A panel from the green tea extract (GTex) and EGCG study in ischemic rats presents data related to Morris water maze performance. GTex and EGCG administration before middle cerebral artery ligation significantly improved ischemia-induced memory impairment compared with untreated controls.

chart

Figure 163

Oxidative stress markers in cerebral ischemic rats are displayed following treatment with green tea extract or EGCG. Malondialdehyde (MDA) levels, an indicator of lipid peroxidation, were measured across treatment groups to assess the antioxidant effects of these polyphenol compounds.

chart

Figure 164

Brain tissue sections from ischemic rats illustrate the neuroprotective effects of green tea polyphenols. Histological analysis reveals differences in neuronal damage between GTex/EGCG-treated and vehicle-treated groups following middle cerebral artery occlusion.

micrograph

Figure 165

Antioxidant enzyme activity in ischemic rat brain tissue is quantified across experimental groups. Glutathione levels and superoxide dismutase (SOD) activity indicate that green tea extract and EGCG may attenuate oxidative damage associated with cerebral ischemia.

chart

Figure 166

Neuroinflammatory markers are assessed in this panel from the ischemic stroke study. The data suggest that EGCG, the major polyphenol in green tea extract, modulates inflammatory responses in the brain following ischemic injury, comparable to the reference drug pentoxifylline.

chart

Figure 167

Behavioral assessment data from the Morris water maze test demonstrate spatial learning and memory performance in cerebral ischemic rats. Animals receiving green tea extract or EGCG pretreatment showed improved escape latency and time spent in the target quadrant.

chart

Figure 168

Catalase activity and related oxidative stress parameters in brain tissue are shown for different treatment groups in this ischemic stroke model. Green tea polyphenols, particularly EGCG, are associated with preservation of endogenous antioxidant defense mechanisms.

chart

Figure 169

A panel from the green tea extract (GTex) and EGCG study in ischemic rats presents data related to Morris water maze performance. GTex and EGCG administration before middle cerebral artery ligation significantly improved ischemia-induced memory impairment compared with untreated controls.

chart

Figure 170

Oxidative stress markers in cerebral ischemic rats are displayed following treatment with green tea extract or EGCG. Malondialdehyde (MDA) levels, an indicator of lipid peroxidation, were measured across treatment groups to assess the antioxidant effects of these polyphenol compounds.

chart

Figure 171

Brain tissue sections from ischemic rats illustrate the neuroprotective effects of green tea polyphenols. Histological analysis reveals differences in neuronal damage between GTex/EGCG-treated and vehicle-treated groups following middle cerebral artery occlusion.

micrograph

Figure 172

Antioxidant enzyme activity in ischemic rat brain tissue is quantified across experimental groups. Glutathione levels and superoxide dismutase (SOD) activity indicate that green tea extract and EGCG may attenuate oxidative damage associated with cerebral ischemia.

chart

Figure 173

Neuroinflammatory markers are assessed in this panel from the ischemic stroke study. The data suggest that EGCG, the major polyphenol in green tea extract, modulates inflammatory responses in the brain following ischemic injury, comparable to the reference drug pentoxifylline.

chart

Figure 174

Behavioral assessment data from the Morris water maze test demonstrate spatial learning and memory performance in cerebral ischemic rats. Animals receiving green tea extract or EGCG pretreatment showed improved escape latency and time spent in the target quadrant.

chart

Figure 175

Catalase activity and related oxidative stress parameters in brain tissue are shown for different treatment groups in this ischemic stroke model. Green tea polyphenols, particularly EGCG, are associated with preservation of endogenous antioxidant defense mechanisms.

chart

Figure 176

A panel from the green tea extract (GTex) and EGCG study in ischemic rats presents data related to Morris water maze performance. GTex and EGCG administration before middle cerebral artery ligation significantly improved ischemia-induced memory impairment compared with untreated controls.

chart

Figure 177

Oxidative stress markers in cerebral ischemic rats are displayed following treatment with green tea extract or EGCG. Malondialdehyde (MDA) levels, an indicator of lipid peroxidation, were measured across treatment groups to assess the antioxidant effects of these polyphenol compounds.

chart

Figure 178

Brain tissue sections from ischemic rats illustrate the neuroprotective effects of green tea polyphenols. Histological analysis reveals differences in neuronal damage between GTex/EGCG-treated and vehicle-treated groups following middle cerebral artery occlusion.

micrograph

Figure 179

Antioxidant enzyme activity in ischemic rat brain tissue is quantified across experimental groups. Glutathione levels and superoxide dismutase (SOD) activity indicate that green tea extract and EGCG may attenuate oxidative damage associated with cerebral ischemia.

chart

Figure 180

Neuroinflammatory markers are assessed in this panel from the ischemic stroke study. The data suggest that EGCG, the major polyphenol in green tea extract, modulates inflammatory responses in the brain following ischemic injury, comparable to the reference drug pentoxifylline.

chart

Figure 181

Behavioral assessment data from the Morris water maze test demonstrate spatial learning and memory performance in cerebral ischemic rats. Animals receiving green tea extract or EGCG pretreatment showed improved escape latency and time spent in the target quadrant.

chart

Figure 182

Catalase activity and related oxidative stress parameters in brain tissue are shown for different treatment groups in this ischemic stroke model. Green tea polyphenols, particularly EGCG, are associated with preservation of endogenous antioxidant defense mechanisms.

chart

Figure 183

A panel from the green tea extract (GTex) and EGCG study in ischemic rats presents data related to Morris water maze performance. GTex and EGCG administration before middle cerebral artery ligation significantly improved ischemia-induced memory impairment compared with untreated controls.

chart

Figure 184

Oxidative stress markers in cerebral ischemic rats are displayed following treatment with green tea extract or EGCG. Malondialdehyde (MDA) levels, an indicator of lipid peroxidation, were measured across treatment groups to assess the antioxidant effects of these polyphenol compounds.

chart

Figure 185

Brain tissue sections from ischemic rats illustrate the neuroprotective effects of green tea polyphenols. Histological analysis reveals differences in neuronal damage between GTex/EGCG-treated and vehicle-treated groups following middle cerebral artery occlusion.

micrograph

Figure 186

Antioxidant enzyme activity in ischemic rat brain tissue is quantified across experimental groups. Glutathione levels and superoxide dismutase (SOD) activity indicate that green tea extract and EGCG may attenuate oxidative damage associated with cerebral ischemia.

chart

Figure 187

Neuroinflammatory markers are assessed in this panel from the ischemic stroke study. The data suggest that EGCG, the major polyphenol in green tea extract, modulates inflammatory responses in the brain following ischemic injury, comparable to the reference drug pentoxifylline.

chart

Figure 188

Behavioral assessment data from the Morris water maze test demonstrate spatial learning and memory performance in cerebral ischemic rats. Animals receiving green tea extract or EGCG pretreatment showed improved escape latency and time spent in the target quadrant.

chart

Figure 189

Catalase activity and related oxidative stress parameters in brain tissue are shown for different treatment groups in this ischemic stroke model. Green tea polyphenols, particularly EGCG, are associated with preservation of endogenous antioxidant defense mechanisms.

chart

Figure 190

A panel from the green tea extract (GTex) and EGCG study in ischemic rats presents data related to Morris water maze performance. GTex and EGCG administration before middle cerebral artery ligation significantly improved ischemia-induced memory impairment compared with untreated controls.

chart

Figure 191

Oxidative stress markers in cerebral ischemic rats are displayed following treatment with green tea extract or EGCG. Malondialdehyde (MDA) levels, an indicator of lipid peroxidation, were measured across treatment groups to assess the antioxidant effects of these polyphenol compounds.

chart

Figure 192

Brain tissue sections from ischemic rats illustrate the neuroprotective effects of green tea polyphenols. Histological analysis reveals differences in neuronal damage between GTex/EGCG-treated and vehicle-treated groups following middle cerebral artery occlusion.

micrograph

Figure 193

Antioxidant enzyme activity in ischemic rat brain tissue is quantified across experimental groups. Glutathione levels and superoxide dismutase (SOD) activity indicate that green tea extract and EGCG may attenuate oxidative damage associated with cerebral ischemia.

chart

Figure 194

Neuroinflammatory markers are assessed in this panel from the ischemic stroke study. The data suggest that EGCG, the major polyphenol in green tea extract, modulates inflammatory responses in the brain following ischemic injury, comparable to the reference drug pentoxifylline.

chart

Figure 195

Behavioral assessment data from the Morris water maze test demonstrate spatial learning and memory performance in cerebral ischemic rats. Animals receiving green tea extract or EGCG pretreatment showed improved escape latency and time spent in the target quadrant.

chart

Figure 196

Catalase activity and related oxidative stress parameters in brain tissue are shown for different treatment groups in this ischemic stroke model. Green tea polyphenols, particularly EGCG, are associated with preservation of endogenous antioxidant defense mechanisms.

chart

Figure 197

A panel from the green tea extract (GTex) and EGCG study in ischemic rats presents data related to Morris water maze performance. GTex and EGCG administration before middle cerebral artery ligation significantly improved ischemia-induced memory impairment compared with untreated controls.

chart

Figure 198

Oxidative stress markers in cerebral ischemic rats are displayed following treatment with green tea extract or EGCG. Malondialdehyde (MDA) levels, an indicator of lipid peroxidation, were measured across treatment groups to assess the antioxidant effects of these polyphenol compounds.

chart

Figure 199

Brain tissue sections from ischemic rats illustrate the neuroprotective effects of green tea polyphenols. Histological analysis reveals differences in neuronal damage between GTex/EGCG-treated and vehicle-treated groups following middle cerebral artery occlusion.

micrograph

Figure 200

Antioxidant enzyme activity in ischemic rat brain tissue is quantified across experimental groups. Glutathione levels and superoxide dismutase (SOD) activity indicate that green tea extract and EGCG may attenuate oxidative damage associated with cerebral ischemia.

chart

Figure 201

Neuroinflammatory markers are assessed in this panel from the ischemic stroke study. The data suggest that EGCG, the major polyphenol in green tea extract, modulates inflammatory responses in the brain following ischemic injury, comparable to the reference drug pentoxifylline.

chart

Figure 202

Behavioral assessment data from the Morris water maze test demonstrate spatial learning and memory performance in cerebral ischemic rats. Animals receiving green tea extract or EGCG pretreatment showed improved escape latency and time spent in the target quadrant.

chart

Figure 203

Catalase activity and related oxidative stress parameters in brain tissue are shown for different treatment groups in this ischemic stroke model. Green tea polyphenols, particularly EGCG, are associated with preservation of endogenous antioxidant defense mechanisms.

chart

Figure 204

A panel from the green tea extract (GTex) and EGCG study in ischemic rats presents data related to Morris water maze performance. GTex and EGCG administration before middle cerebral artery ligation significantly improved ischemia-induced memory impairment compared with untreated controls.

chart

Figure 205

Oxidative stress markers in cerebral ischemic rats are displayed following treatment with green tea extract or EGCG. Malondialdehyde (MDA) levels, an indicator of lipid peroxidation, were measured across treatment groups to assess the antioxidant effects of these polyphenol compounds.

chart

Figure 206

Brain tissue sections from ischemic rats illustrate the neuroprotective effects of green tea polyphenols. Histological analysis reveals differences in neuronal damage between GTex/EGCG-treated and vehicle-treated groups following middle cerebral artery occlusion.

micrograph

Figure 207

Antioxidant enzyme activity in ischemic rat brain tissue is quantified across experimental groups. Glutathione levels and superoxide dismutase (SOD) activity indicate that green tea extract and EGCG may attenuate oxidative damage associated with cerebral ischemia.

chart

Figure 208

Neuroinflammatory markers are assessed in this panel from the ischemic stroke study. The data suggest that EGCG, the major polyphenol in green tea extract, modulates inflammatory responses in the brain following ischemic injury, comparable to the reference drug pentoxifylline.

chart

Figure 209

Behavioral assessment data from the Morris water maze test demonstrate spatial learning and memory performance in cerebral ischemic rats. Animals receiving green tea extract or EGCG pretreatment showed improved escape latency and time spent in the target quadrant.

chart

Figure 210

Catalase activity and related oxidative stress parameters in brain tissue are shown for different treatment groups in this ischemic stroke model. Green tea polyphenols, particularly EGCG, are associated with preservation of endogenous antioxidant defense mechanisms.

chart

Figure 211

A panel from the green tea extract (GTex) and EGCG study in ischemic rats presents data related to Morris water maze performance. GTex and EGCG administration before middle cerebral artery ligation significantly improved ischemia-induced memory impairment compared with untreated controls.

chart

Figure 212

Oxidative stress markers in cerebral ischemic rats are displayed following treatment with green tea extract or EGCG. Malondialdehyde (MDA) levels, an indicator of lipid peroxidation, were measured across treatment groups to assess the antioxidant effects of these polyphenol compounds.

chart

Figure 213

Brain tissue sections from ischemic rats illustrate the neuroprotective effects of green tea polyphenols. Histological analysis reveals differences in neuronal damage between GTex/EGCG-treated and vehicle-treated groups following middle cerebral artery occlusion.

micrograph

Figure 214

Antioxidant enzyme activity in ischemic rat brain tissue is quantified across experimental groups. Glutathione levels and superoxide dismutase (SOD) activity indicate that green tea extract and EGCG may attenuate oxidative damage associated with cerebral ischemia.

chart

Figure 215

Neuroinflammatory markers are assessed in this panel from the ischemic stroke study. The data suggest that EGCG, the major polyphenol in green tea extract, modulates inflammatory responses in the brain following ischemic injury, comparable to the reference drug pentoxifylline.

chart

Figure 216

Behavioral assessment data from the Morris water maze test demonstrate spatial learning and memory performance in cerebral ischemic rats. Animals receiving green tea extract or EGCG pretreatment showed improved escape latency and time spent in the target quadrant.

chart

Figure 217

Catalase activity and related oxidative stress parameters in brain tissue are shown for different treatment groups in this ischemic stroke model. Green tea polyphenols, particularly EGCG, are associated with preservation of endogenous antioxidant defense mechanisms.

chart

Figure 218

A panel from the green tea extract (GTex) and EGCG study in ischemic rats presents data related to Morris water maze performance. GTex and EGCG administration before middle cerebral artery ligation significantly improved ischemia-induced memory impairment compared with untreated controls.

chart

Figure 219

Oxidative stress markers in cerebral ischemic rats are displayed following treatment with green tea extract or EGCG. Malondialdehyde (MDA) levels, an indicator of lipid peroxidation, were measured across treatment groups to assess the antioxidant effects of these polyphenol compounds.

chart

Figure 220

Brain tissue sections from ischemic rats illustrate the neuroprotective effects of green tea polyphenols. Histological analysis reveals differences in neuronal damage between GTex/EGCG-treated and vehicle-treated groups following middle cerebral artery occlusion.

micrograph

Figure 221

Antioxidant enzyme activity in ischemic rat brain tissue is quantified across experimental groups. Glutathione levels and superoxide dismutase (SOD) activity indicate that green tea extract and EGCG may attenuate oxidative damage associated with cerebral ischemia.

chart

Figure 222

Neuroinflammatory markers are assessed in this panel from the ischemic stroke study. The data suggest that EGCG, the major polyphenol in green tea extract, modulates inflammatory responses in the brain following ischemic injury, comparable to the reference drug pentoxifylline.

chart

Figure 223

Behavioral assessment data from the Morris water maze test demonstrate spatial learning and memory performance in cerebral ischemic rats. Animals receiving green tea extract or EGCG pretreatment showed improved escape latency and time spent in the target quadrant.

chart

Figure 224

Catalase activity and related oxidative stress parameters in brain tissue are shown for different treatment groups in this ischemic stroke model. Green tea polyphenols, particularly EGCG, are associated with preservation of endogenous antioxidant defense mechanisms.

chart

Figure 225

A panel from the green tea extract (GTex) and EGCG study in ischemic rats presents data related to Morris water maze performance. GTex and EGCG administration before middle cerebral artery ligation significantly improved ischemia-induced memory impairment compared with untreated controls.

chart

Figure 226

Oxidative stress markers in cerebral ischemic rats are displayed following treatment with green tea extract or EGCG. Malondialdehyde (MDA) levels, an indicator of lipid peroxidation, were measured across treatment groups to assess the antioxidant effects of these polyphenol compounds.

chart

Figure 227

Brain tissue sections from ischemic rats illustrate the neuroprotective effects of green tea polyphenols. Histological analysis reveals differences in neuronal damage between GTex/EGCG-treated and vehicle-treated groups following middle cerebral artery occlusion.

micrograph

Figure 228

Antioxidant enzyme activity in ischemic rat brain tissue is quantified across experimental groups. Glutathione levels and superoxide dismutase (SOD) activity indicate that green tea extract and EGCG may attenuate oxidative damage associated with cerebral ischemia.

chart

Figure 229

Neuroinflammatory markers are assessed in this panel from the ischemic stroke study. The data suggest that EGCG, the major polyphenol in green tea extract, modulates inflammatory responses in the brain following ischemic injury, comparable to the reference drug pentoxifylline.

chart

Figure 230

Behavioral assessment data from the Morris water maze test demonstrate spatial learning and memory performance in cerebral ischemic rats. Animals receiving green tea extract or EGCG pretreatment showed improved escape latency and time spent in the target quadrant.

chart

Figure 231

Catalase activity and related oxidative stress parameters in brain tissue are shown for different treatment groups in this ischemic stroke model. Green tea polyphenols, particularly EGCG, are associated with preservation of endogenous antioxidant defense mechanisms.

chart

Figure 232

A panel from the green tea extract (GTex) and EGCG study in ischemic rats presents data related to Morris water maze performance. GTex and EGCG administration before middle cerebral artery ligation significantly improved ischemia-induced memory impairment compared with untreated controls.

chart

Figure 233

Oxidative stress markers in cerebral ischemic rats are displayed following treatment with green tea extract or EGCG. Malondialdehyde (MDA) levels, an indicator of lipid peroxidation, were measured across treatment groups to assess the antioxidant effects of these polyphenol compounds.

chart

Figure 234

Brain tissue sections from ischemic rats illustrate the neuroprotective effects of green tea polyphenols. Histological analysis reveals differences in neuronal damage between GTex/EGCG-treated and vehicle-treated groups following middle cerebral artery occlusion.

micrograph

Figure 235

Antioxidant enzyme activity in ischemic rat brain tissue is quantified across experimental groups. Glutathione levels and superoxide dismutase (SOD) activity indicate that green tea extract and EGCG may attenuate oxidative damage associated with cerebral ischemia.

chart

Figure 236

Neuroinflammatory markers are assessed in this panel from the ischemic stroke study. The data suggest that EGCG, the major polyphenol in green tea extract, modulates inflammatory responses in the brain following ischemic injury, comparable to the reference drug pentoxifylline.

chart

Figure 237

Behavioral assessment data from the Morris water maze test demonstrate spatial learning and memory performance in cerebral ischemic rats. Animals receiving green tea extract or EGCG pretreatment showed improved escape latency and time spent in the target quadrant.

chart

Figure 238

Catalase activity and related oxidative stress parameters in brain tissue are shown for different treatment groups in this ischemic stroke model. Green tea polyphenols, particularly EGCG, are associated with preservation of endogenous antioxidant defense mechanisms.

chart

Figure 239

A panel from the green tea extract (GTex) and EGCG study in ischemic rats presents data related to Morris water maze performance. GTex and EGCG administration before middle cerebral artery ligation significantly improved ischemia-induced memory impairment compared with untreated controls.

chart

Figure 240

Oxidative stress markers in cerebral ischemic rats are displayed following treatment with green tea extract or EGCG. Malondialdehyde (MDA) levels, an indicator of lipid peroxidation, were measured across treatment groups to assess the antioxidant effects of these polyphenol compounds.

chart

Figure 241

Brain tissue sections from ischemic rats illustrate the neuroprotective effects of green tea polyphenols. Histological analysis reveals differences in neuronal damage between GTex/EGCG-treated and vehicle-treated groups following middle cerebral artery occlusion.

micrograph

Figure 242

Antioxidant enzyme activity in ischemic rat brain tissue is quantified across experimental groups. Glutathione levels and superoxide dismutase (SOD) activity indicate that green tea extract and EGCG may attenuate oxidative damage associated with cerebral ischemia.

chart

Figure 243

Neuroinflammatory markers are assessed in this panel from the ischemic stroke study. The data suggest that EGCG, the major polyphenol in green tea extract, modulates inflammatory responses in the brain following ischemic injury, comparable to the reference drug pentoxifylline.

chart

Figure 244

Behavioral assessment data from the Morris water maze test demonstrate spatial learning and memory performance in cerebral ischemic rats. Animals receiving green tea extract or EGCG pretreatment showed improved escape latency and time spent in the target quadrant.

chart

Figure 245

Catalase activity and related oxidative stress parameters in brain tissue are shown for different treatment groups in this ischemic stroke model. Green tea polyphenols, particularly EGCG, are associated with preservation of endogenous antioxidant defense mechanisms.

chart

Figure 246

A panel from the green tea extract (GTex) and EGCG study in ischemic rats presents data related to Morris water maze performance. GTex and EGCG administration before middle cerebral artery ligation significantly improved ischemia-induced memory impairment compared with untreated controls.

chart

Figure 247

Oxidative stress markers in cerebral ischemic rats are displayed following treatment with green tea extract or EGCG. Malondialdehyde (MDA) levels, an indicator of lipid peroxidation, were measured across treatment groups to assess the antioxidant effects of these polyphenol compounds.

chart

Figure 248

Brain tissue sections from ischemic rats illustrate the neuroprotective effects of green tea polyphenols. Histological analysis reveals differences in neuronal damage between GTex/EGCG-treated and vehicle-treated groups following middle cerebral artery occlusion.

micrograph

Figure 249

Antioxidant enzyme activity in ischemic rat brain tissue is quantified across experimental groups. Glutathione levels and superoxide dismutase (SOD) activity indicate that green tea extract and EGCG may attenuate oxidative damage associated with cerebral ischemia.

chart

Figure 250

Neuroinflammatory markers are assessed in this panel from the ischemic stroke study. The data suggest that EGCG, the major polyphenol in green tea extract, modulates inflammatory responses in the brain following ischemic injury, comparable to the reference drug pentoxifylline.

chart

Figure 251

Behavioral assessment data from the Morris water maze test demonstrate spatial learning and memory performance in cerebral ischemic rats. Animals receiving green tea extract or EGCG pretreatment showed improved escape latency and time spent in the target quadrant.

chart

Figure 252

Catalase activity and related oxidative stress parameters in brain tissue are shown for different treatment groups in this ischemic stroke model. Green tea polyphenols, particularly EGCG, are associated with preservation of endogenous antioxidant defense mechanisms.

chart

Figure 253

A panel from the green tea extract (GTex) and EGCG study in ischemic rats presents data related to Morris water maze performance. GTex and EGCG administration before middle cerebral artery ligation significantly improved ischemia-induced memory impairment compared with untreated controls.

chart

Figure 254

Oxidative stress markers in cerebral ischemic rats are displayed following treatment with green tea extract or EGCG. Malondialdehyde (MDA) levels, an indicator of lipid peroxidation, were measured across treatment groups to assess the antioxidant effects of these polyphenol compounds.

chart

Figure 255

Brain tissue sections from ischemic rats illustrate the neuroprotective effects of green tea polyphenols. Histological analysis reveals differences in neuronal damage between GTex/EGCG-treated and vehicle-treated groups following middle cerebral artery occlusion.

micrograph

Figure 256

Antioxidant enzyme activity in ischemic rat brain tissue is quantified across experimental groups. Glutathione levels and superoxide dismutase (SOD) activity indicate that green tea extract and EGCG may attenuate oxidative damage associated with cerebral ischemia.

chart

Figure 257

Neuroinflammatory markers are assessed in this panel from the ischemic stroke study. The data suggest that EGCG, the major polyphenol in green tea extract, modulates inflammatory responses in the brain following ischemic injury, comparable to the reference drug pentoxifylline.

chart

Figure 258

Behavioral assessment data from the Morris water maze test demonstrate spatial learning and memory performance in cerebral ischemic rats. Animals receiving green tea extract or EGCG pretreatment showed improved escape latency and time spent in the target quadrant.

chart

Figure 259

Catalase activity and related oxidative stress parameters in brain tissue are shown for different treatment groups in this ischemic stroke model. Green tea polyphenols, particularly EGCG, are associated with preservation of endogenous antioxidant defense mechanisms.

chart

Figure 260

A panel from the green tea extract (GTex) and EGCG study in ischemic rats presents data related to Morris water maze performance. GTex and EGCG administration before middle cerebral artery ligation significantly improved ischemia-induced memory impairment compared with untreated controls.

chart

Figure 261

Oxidative stress markers in cerebral ischemic rats are displayed following treatment with green tea extract or EGCG. Malondialdehyde (MDA) levels, an indicator of lipid peroxidation, were measured across treatment groups to assess the antioxidant effects of these polyphenol compounds.

chart

Figure 262

Brain tissue sections from ischemic rats illustrate the neuroprotective effects of green tea polyphenols. Histological analysis reveals differences in neuronal damage between GTex/EGCG-treated and vehicle-treated groups following middle cerebral artery occlusion.

micrograph

Figure 263

Antioxidant enzyme activity in ischemic rat brain tissue is quantified across experimental groups. Glutathione levels and superoxide dismutase (SOD) activity indicate that green tea extract and EGCG may attenuate oxidative damage associated with cerebral ischemia.

chart

Figure 264

Neuroinflammatory markers are assessed in this panel from the ischemic stroke study. The data suggest that EGCG, the major polyphenol in green tea extract, modulates inflammatory responses in the brain following ischemic injury, comparable to the reference drug pentoxifylline.

chart

Figure 265

Behavioral assessment data from the Morris water maze test demonstrate spatial learning and memory performance in cerebral ischemic rats. Animals receiving green tea extract or EGCG pretreatment showed improved escape latency and time spent in the target quadrant.

chart

Figure 266

Catalase activity and related oxidative stress parameters in brain tissue are shown for different treatment groups in this ischemic stroke model. Green tea polyphenols, particularly EGCG, are associated with preservation of endogenous antioxidant defense mechanisms.

chart

Figure 267

A panel from the green tea extract (GTex) and EGCG study in ischemic rats presents data related to Morris water maze performance. GTex and EGCG administration before middle cerebral artery ligation significantly improved ischemia-induced memory impairment compared with untreated controls.

chart

Figure 268

Oxidative stress markers in cerebral ischemic rats are displayed following treatment with green tea extract or EGCG. Malondialdehyde (MDA) levels, an indicator of lipid peroxidation, were measured across treatment groups to assess the antioxidant effects of these polyphenol compounds.

chart

Figure 269

Brain tissue sections from ischemic rats illustrate the neuroprotective effects of green tea polyphenols. Histological analysis reveals differences in neuronal damage between GTex/EGCG-treated and vehicle-treated groups following middle cerebral artery occlusion.

micrograph

Figure 270

Antioxidant enzyme activity in ischemic rat brain tissue is quantified across experimental groups. Glutathione levels and superoxide dismutase (SOD) activity indicate that green tea extract and EGCG may attenuate oxidative damage associated with cerebral ischemia.

chart

Figure 271

Neuroinflammatory markers are assessed in this panel from the ischemic stroke study. The data suggest that EGCG, the major polyphenol in green tea extract, modulates inflammatory responses in the brain following ischemic injury, comparable to the reference drug pentoxifylline.

chart

Figure 272

Behavioral assessment data from the Morris water maze test demonstrate spatial learning and memory performance in cerebral ischemic rats. Animals receiving green tea extract or EGCG pretreatment showed improved escape latency and time spent in the target quadrant.

chart

Figure 273

Catalase activity and related oxidative stress parameters in brain tissue are shown for different treatment groups in this ischemic stroke model. Green tea polyphenols, particularly EGCG, are associated with preservation of endogenous antioxidant defense mechanisms.

chart

Figure 274

A panel from the green tea extract (GTex) and EGCG study in ischemic rats presents data related to Morris water maze performance. GTex and EGCG administration before middle cerebral artery ligation significantly improved ischemia-induced memory impairment compared with untreated controls.

chart

Figure 275

Oxidative stress markers in cerebral ischemic rats are displayed following treatment with green tea extract or EGCG. Malondialdehyde (MDA) levels, an indicator of lipid peroxidation, were measured across treatment groups to assess the antioxidant effects of these polyphenol compounds.

chart

Figure 276

Brain tissue sections from ischemic rats illustrate the neuroprotective effects of green tea polyphenols. Histological analysis reveals differences in neuronal damage between GTex/EGCG-treated and vehicle-treated groups following middle cerebral artery occlusion.

micrograph

Figure 277

Antioxidant enzyme activity in ischemic rat brain tissue is quantified across experimental groups. Glutathione levels and superoxide dismutase (SOD) activity indicate that green tea extract and EGCG may attenuate oxidative damage associated with cerebral ischemia.

chart

Figure 278

Neuroinflammatory markers are assessed in this panel from the ischemic stroke study. The data suggest that EGCG, the major polyphenol in green tea extract, modulates inflammatory responses in the brain following ischemic injury, comparable to the reference drug pentoxifylline.

chart

Figure 279

Behavioral assessment data from the Morris water maze test demonstrate spatial learning and memory performance in cerebral ischemic rats. Animals receiving green tea extract or EGCG pretreatment showed improved escape latency and time spent in the target quadrant.

chart

Figure 280

Catalase activity and related oxidative stress parameters in brain tissue are shown for different treatment groups in this ischemic stroke model. Green tea polyphenols, particularly EGCG, are associated with preservation of endogenous antioxidant defense mechanisms.

chart

Figure 281

A panel from the green tea extract (GTex) and EGCG study in ischemic rats presents data related to Morris water maze performance. GTex and EGCG administration before middle cerebral artery ligation significantly improved ischemia-induced memory impairment compared with untreated controls.

chart

Figure 282

Oxidative stress markers in cerebral ischemic rats are displayed following treatment with green tea extract or EGCG. Malondialdehyde (MDA) levels, an indicator of lipid peroxidation, were measured across treatment groups to assess the antioxidant effects of these polyphenol compounds.

chart

Figure 283

Brain tissue sections from ischemic rats illustrate the neuroprotective effects of green tea polyphenols. Histological analysis reveals differences in neuronal damage between GTex/EGCG-treated and vehicle-treated groups following middle cerebral artery occlusion.

micrograph

Figure 284

Antioxidant enzyme activity in ischemic rat brain tissue is quantified across experimental groups. Glutathione levels and superoxide dismutase (SOD) activity indicate that green tea extract and EGCG may attenuate oxidative damage associated with cerebral ischemia.

chart

Figure 285

Neuroinflammatory markers are assessed in this panel from the ischemic stroke study. The data suggest that EGCG, the major polyphenol in green tea extract, modulates inflammatory responses in the brain following ischemic injury, comparable to the reference drug pentoxifylline.

chart

Figure 286

Behavioral assessment data from the Morris water maze test demonstrate spatial learning and memory performance in cerebral ischemic rats. Animals receiving green tea extract or EGCG pretreatment showed improved escape latency and time spent in the target quadrant.

chart

Figure 287

Catalase activity and related oxidative stress parameters in brain tissue are shown for different treatment groups in this ischemic stroke model. Green tea polyphenols, particularly EGCG, are associated with preservation of endogenous antioxidant defense mechanisms.

chart

Figure 288

A panel from the green tea extract (GTex) and EGCG study in ischemic rats presents data related to Morris water maze performance. GTex and EGCG administration before middle cerebral artery ligation significantly improved ischemia-induced memory impairment compared with untreated controls.

chart

Figure 289

Oxidative stress markers in cerebral ischemic rats are displayed following treatment with green tea extract or EGCG. Malondialdehyde (MDA) levels, an indicator of lipid peroxidation, were measured across treatment groups to assess the antioxidant effects of these polyphenol compounds.

chart

Figure 290

Brain tissue sections from ischemic rats illustrate the neuroprotective effects of green tea polyphenols. Histological analysis reveals differences in neuronal damage between GTex/EGCG-treated and vehicle-treated groups following middle cerebral artery occlusion.

micrograph

Figure 291

Antioxidant enzyme activity in ischemic rat brain tissue is quantified across experimental groups. Glutathione levels and superoxide dismutase (SOD) activity indicate that green tea extract and EGCG may attenuate oxidative damage associated with cerebral ischemia.

chart

Figure 292

Neuroinflammatory markers are assessed in this panel from the ischemic stroke study. The data suggest that EGCG, the major polyphenol in green tea extract, modulates inflammatory responses in the brain following ischemic injury, comparable to the reference drug pentoxifylline.

chart

Figure 293

Behavioral assessment data from the Morris water maze test demonstrate spatial learning and memory performance in cerebral ischemic rats. Animals receiving green tea extract or EGCG pretreatment showed improved escape latency and time spent in the target quadrant.

chart

Figure 294

Catalase activity and related oxidative stress parameters in brain tissue are shown for different treatment groups in this ischemic stroke model. Green tea polyphenols, particularly EGCG, are associated with preservation of endogenous antioxidant defense mechanisms.

chart

Figure 295

A panel from the green tea extract (GTex) and EGCG study in ischemic rats presents data related to Morris water maze performance. GTex and EGCG administration before middle cerebral artery ligation significantly improved ischemia-induced memory impairment compared with untreated controls.

chart

Figure 296

Oxidative stress markers in cerebral ischemic rats are displayed following treatment with green tea extract or EGCG. Malondialdehyde (MDA) levels, an indicator of lipid peroxidation, were measured across treatment groups to assess the antioxidant effects of these polyphenol compounds.

chart

Figure 297

Brain tissue sections from ischemic rats illustrate the neuroprotective effects of green tea polyphenols. Histological analysis reveals differences in neuronal damage between GTex/EGCG-treated and vehicle-treated groups following middle cerebral artery occlusion.

micrograph

Figure 298

Antioxidant enzyme activity in ischemic rat brain tissue is quantified across experimental groups. Glutathione levels and superoxide dismutase (SOD) activity indicate that green tea extract and EGCG may attenuate oxidative damage associated with cerebral ischemia.

chart

Figure 299

Neuroinflammatory markers are assessed in this panel from the ischemic stroke study. The data suggest that EGCG, the major polyphenol in green tea extract, modulates inflammatory responses in the brain following ischemic injury, comparable to the reference drug pentoxifylline.

chart

Figure 300

Behavioral assessment data from the Morris water maze test demonstrate spatial learning and memory performance in cerebral ischemic rats. Animals receiving green tea extract or EGCG pretreatment showed improved escape latency and time spent in the target quadrant.

chart

Figure 301

Catalase activity and related oxidative stress parameters in brain tissue are shown for different treatment groups in this ischemic stroke model. Green tea polyphenols, particularly EGCG, are associated with preservation of endogenous antioxidant defense mechanisms.

chart

Figure 302

A panel from the green tea extract (GTex) and EGCG study in ischemic rats presents data related to Morris water maze performance. GTex and EGCG administration before middle cerebral artery ligation significantly improved ischemia-induced memory impairment compared with untreated controls.

chart

Figure 303

Oxidative stress markers in cerebral ischemic rats are displayed following treatment with green tea extract or EGCG. Malondialdehyde (MDA) levels, an indicator of lipid peroxidation, were measured across treatment groups to assess the antioxidant effects of these polyphenol compounds.

chart

Figure 304

Brain tissue sections from ischemic rats illustrate the neuroprotective effects of green tea polyphenols. Histological analysis reveals differences in neuronal damage between GTex/EGCG-treated and vehicle-treated groups following middle cerebral artery occlusion.

micrograph

Figure 305

Antioxidant enzyme activity in ischemic rat brain tissue is quantified across experimental groups. Glutathione levels and superoxide dismutase (SOD) activity indicate that green tea extract and EGCG may attenuate oxidative damage associated with cerebral ischemia.

chart

Figure 306

Neuroinflammatory markers are assessed in this panel from the ischemic stroke study. The data suggest that EGCG, the major polyphenol in green tea extract, modulates inflammatory responses in the brain following ischemic injury, comparable to the reference drug pentoxifylline.

chart

Figure 307

Behavioral assessment data from the Morris water maze test demonstrate spatial learning and memory performance in cerebral ischemic rats. Animals receiving green tea extract or EGCG pretreatment showed improved escape latency and time spent in the target quadrant.

chart

Figure 308

Catalase activity and related oxidative stress parameters in brain tissue are shown for different treatment groups in this ischemic stroke model. Green tea polyphenols, particularly EGCG, are associated with preservation of endogenous antioxidant defense mechanisms.

chart

Figure 309

A panel from the green tea extract (GTex) and EGCG study in ischemic rats presents data related to Morris water maze performance. GTex and EGCG administration before middle cerebral artery ligation significantly improved ischemia-induced memory impairment compared with untreated controls.

chart

Figure 310

Oxidative stress markers in cerebral ischemic rats are displayed following treatment with green tea extract or EGCG. Malondialdehyde (MDA) levels, an indicator of lipid peroxidation, were measured across treatment groups to assess the antioxidant effects of these polyphenol compounds.

chart

Figure 311

Brain tissue sections from ischemic rats illustrate the neuroprotective effects of green tea polyphenols. Histological analysis reveals differences in neuronal damage between GTex/EGCG-treated and vehicle-treated groups following middle cerebral artery occlusion.

micrograph

Figure 312

Antioxidant enzyme activity in ischemic rat brain tissue is quantified across experimental groups. Glutathione levels and superoxide dismutase (SOD) activity indicate that green tea extract and EGCG may attenuate oxidative damage associated with cerebral ischemia.

chart

Figure 313

Neuroinflammatory markers are assessed in this panel from the ischemic stroke study. The data suggest that EGCG, the major polyphenol in green tea extract, modulates inflammatory responses in the brain following ischemic injury, comparable to the reference drug pentoxifylline.

chart

Figure 314

Behavioral assessment data from the Morris water maze test demonstrate spatial learning and memory performance in cerebral ischemic rats. Animals receiving green tea extract or EGCG pretreatment showed improved escape latency and time spent in the target quadrant.

chart

Figure 315

Catalase activity and related oxidative stress parameters in brain tissue are shown for different treatment groups in this ischemic stroke model. Green tea polyphenols, particularly EGCG, are associated with preservation of endogenous antioxidant defense mechanisms.

chart

Figure 316

A panel from the green tea extract (GTex) and EGCG study in ischemic rats presents data related to Morris water maze performance. GTex and EGCG administration before middle cerebral artery ligation significantly improved ischemia-induced memory impairment compared with untreated controls.

chart

Figure 317

Oxidative stress markers in cerebral ischemic rats are displayed following treatment with green tea extract or EGCG. Malondialdehyde (MDA) levels, an indicator of lipid peroxidation, were measured across treatment groups to assess the antioxidant effects of these polyphenol compounds.

chart

Figure 318

Brain tissue sections from ischemic rats illustrate the neuroprotective effects of green tea polyphenols. Histological analysis reveals differences in neuronal damage between GTex/EGCG-treated and vehicle-treated groups following middle cerebral artery occlusion.

micrograph

Figure 319

Antioxidant enzyme activity in ischemic rat brain tissue is quantified across experimental groups. Glutathione levels and superoxide dismutase (SOD) activity indicate that green tea extract and EGCG may attenuate oxidative damage associated with cerebral ischemia.

chart

Figure 320

Neuroinflammatory markers are assessed in this panel from the ischemic stroke study. The data suggest that EGCG, the major polyphenol in green tea extract, modulates inflammatory responses in the brain following ischemic injury, comparable to the reference drug pentoxifylline.

chart

Figure 321

Behavioral assessment data from the Morris water maze test demonstrate spatial learning and memory performance in cerebral ischemic rats. Animals receiving green tea extract or EGCG pretreatment showed improved escape latency and time spent in the target quadrant.

chart

Figure 322

Catalase activity and related oxidative stress parameters in brain tissue are shown for different treatment groups in this ischemic stroke model. Green tea polyphenols, particularly EGCG, are associated with preservation of endogenous antioxidant defense mechanisms.

chart

Figure 323

A panel from the green tea extract (GTex) and EGCG study in ischemic rats presents data related to Morris water maze performance. GTex and EGCG administration before middle cerebral artery ligation significantly improved ischemia-induced memory impairment compared with untreated controls.

chart

Figure 324

Oxidative stress markers in cerebral ischemic rats are displayed following treatment with green tea extract or EGCG. Malondialdehyde (MDA) levels, an indicator of lipid peroxidation, were measured across treatment groups to assess the antioxidant effects of these polyphenol compounds.

chart

Figure 325

Brain tissue sections from ischemic rats illustrate the neuroprotective effects of green tea polyphenols. Histological analysis reveals differences in neuronal damage between GTex/EGCG-treated and vehicle-treated groups following middle cerebral artery occlusion.

micrograph

Figure 326

Escape latency measurements from the Morris water maze test indicate that rats treated with green tea extract (GTex) and EGCG demonstrated significantly improved spatial learning compared to the ischemic control group.

chart

Figure 327

Swimming path length data from the Morris water maze reveal that EGCG-treated ischemic rats navigated more efficiently to the platform, suggesting preserved spatial memory function.

chart

Figure 328

Time spent in the target quadrant during the Morris water maze probe trial was significantly greater in GTex-treated rats, indicating enhanced memory retention following cerebral ischemia.

chart

Figure 329

Latency to reach the hidden platform across training days shows a steeper learning curve in EGCG and pentoxifylline (PTX) groups compared to untreated ischemic rats.

chart

Figure 330

Representative swimming trajectories from the Morris water maze demonstrate more directed search patterns in green tea extract-treated rats versus erratic paths in ischemic controls.

diagram

Figure 331

Malondialdehyde (MDA) levels in brain tissue homogenates were markedly reduced in rats receiving green tea extract pretreatment, suggesting attenuation of lipid peroxidation after ischemic injury.

chart

Figure 332

Comparison of MDA concentrations across treatment groups indicates that both GTex and EGCG significantly decreased oxidative stress markers relative to the ischemia-only group.

chart

Figure 333

Brain tissue MDA levels measured at different time points post-ischemia show sustained antioxidant effects in the EGCG-treated group compared to vehicle controls.

chart

Figure 334

Superoxide dismutase (SOD) activity in brain homogenates was significantly preserved in GTex-treated ischemic rats, indicating protection of endogenous antioxidant defenses.

chart

Figure 335

Catalase enzyme activity levels across experimental groups demonstrate that EGCG pretreatment maintained antioxidant capacity following middle cerebral artery occlusion.

chart

Figure 336

Glutathione peroxidase (GPx) activity measurements reveal that green tea polyphenols helped maintain redox balance in ischemic brain tissue.

chart

Figure 337

Pro-inflammatory cytokine levels (TNF-alpha, IL-1beta) in ischemic brain tissue were significantly lower in rats pretreated with EGCG, suggesting anti-neuroinflammatory effects.

chart

Figure 338

NF-kappaB expression levels in brain tissue sections indicate reduced inflammatory signaling in the green tea extract treatment group following cerebral ischemia.

chart

Figure 339

Quantification of inflammatory cell infiltration shows fewer activated microglia in EGCG-treated rats compared to the ischemic control group.

chart

Figure 340

COX-2 expression measured by Western blot analysis was attenuated in GTex-treated ischemic rats, consistent with reduced neuroinflammation.

chart

Figure 341

Coronal brain section from a sham-operated rat shows intact neuronal architecture in the hippocampal CA1 region with no signs of ischemic damage.

micrograph

Figure 342

Histological section of hippocampal tissue from an ischemic control rat reveals extensive neuronal cell death and pyknotic nuclei in the CA1 subfield.

micrograph

Figure 343

Brain tissue section from an EGCG-treated rat shows preserved hippocampal neuronal morphology with markedly less ischemic damage compared to untreated controls.

micrograph

Figure 344

Nissl-stained hippocampal sections demonstrate significantly more surviving neurons in the CA1 region of GTex-treated rats following cerebral ischemia.

micrograph

Figure 345

Higher magnification view of the hippocampal CA1 region reveals intact pyramidal cell layers in green tea extract-treated ischemic rats.

micrograph

Figure 346

Representative brain section showing the extent of infarct area, with TTC staining revealing reduced infarct volume in the EGCG pretreatment group.

micrograph

Figure 347

Cortical tissue section from an ischemic rat displays marked neuronal degeneration, characterized by shrunken cell bodies and darkly stained nuclei.

micrograph

Figure 348

Immunohistochemical staining for GFAP in the peri-infarct region shows reduced astrocyte activation in GTex-treated rats.

micrograph

Figure 349

Western blot bands for phospho-Akt and total Akt in hippocampal lysates suggest activation of the PI3K/Akt survival pathway in EGCG-treated ischemic rats.

photograph

Figure 350

Densitometric analysis of Western blot data shows significantly increased Bcl-2/Bax ratio in green tea extract-treated rats, indicating anti-apoptotic signaling.

chart

Figure 351

Protein expression levels of iNOS and COX-2 measured by immunoblotting were reduced in the EGCG group, supporting the anti-inflammatory mechanism of green tea polyphenols.

photograph

Figure 352

Western blot analysis of NF-kappaB p65 subunit translocation reveals attenuated nuclear accumulation in GTex-pretreated ischemic brain tissue.

photograph

Figure 353

Infarct volume quantification by TTC staining demonstrates a significant reduction in brain infarct size in rats receiving green tea extract prior to middle cerebral artery ligation.

chart

Figure 354

Representative TTC-stained coronal brain slices from each experimental group illustrate the dose-dependent neuroprotective effect of EGCG on infarct size.

photograph

Figure 355

Bar graph comparing mean infarct volumes shows that both GTex and EGCG treatments resulted in significantly smaller ischemic lesions than vehicle control.

chart

Figure 356

TUNEL staining of hippocampal sections reveals fewer apoptotic neurons in the EGCG-treated group, suggesting neuroprotection against ischemia-induced cell death.

micrograph

Figure 357

Quantification of TUNEL-positive cells in the peri-infarct cortex indicates that green tea extract pretreatment significantly reduced neuronal apoptosis.

chart

Figure 358

Caspase-3 immunoreactivity in the ischemic penumbra was markedly reduced in GTex-treated rats, consistent with attenuated apoptotic signaling.

micrograph

Figure 359

Neurological deficit scores assessed at 24 hours post-ischemia were significantly lower in the EGCG and GTex groups, indicating better functional outcomes.

chart

Figure 360

Composite neurological function scores across treatment groups demonstrate dose-dependent improvement with EGCG administration before ischemic injury.

chart

Figure 361

Body weight changes over the experimental period show that green tea extract-treated rats maintained closer-to-normal weight compared to untreated ischemic animals.

chart

Figure 362

Experimental timeline illustrating the sequence of green tea extract administration, middle cerebral artery ligation, and behavioral testing in the Morris water maze.

diagram

Figure 363

Schematic diagram of the study design showing group allocation, treatment protocol, and outcome measurement timepoints for the cerebral ischemia model.

flowchart

Figure 364

Regional cerebral blood flow measurements indicate that EGCG pretreatment did not significantly alter perfusion patterns during middle cerebral artery occlusion.

chart

Figure 365

Immunofluorescence staining of brain tissue shows reduced microglial activation (Iba-1 positive cells) in the peri-infarct region of GTex-treated rats.

micrograph

Figure 366

Quantitative analysis of surviving neurons in the hippocampal CA1 region reveals a significantly higher neuronal density in EGCG-treated versus ischemic control animals.

chart

Figure 367

Dose-response relationship between EGCG concentration and MDA reduction suggests optimal neuroprotection at the tested pretreatment dose.

chart

Figure 368

Representative photomicrographs of Fluoro-Jade B staining demonstrate fewer degenerating neurons in the cortex of green tea extract-treated ischemic rats.

micrograph

Figure 369

Brain edema quantification based on wet-dry weight ratios indicates reduced cerebral swelling in the EGCG pretreatment group following ischemia.

chart

Figure 370

Correlation analysis between escape latency in the Morris water maze and hippocampal MDA levels suggests that oxidative stress is associated with memory impairment severity.

chart

Figure 371

Cytochrome c release from mitochondria was attenuated in the EGCG group, as shown by Western blot analysis of cytosolic and mitochondrial fractions.

photograph

Figure 372

Heat map of gene expression changes in the ischemic penumbra reveals upregulation of antioxidant response elements in GTex-pretreated rats.

chart

Figure 373

Comparative analysis of platform crossings during the probe trial indicates significantly better spatial memory recall in both EGCG and PTX groups.

chart

Figure 374

Immunohistochemical detection of 8-OHdG (oxidative DNA damage marker) shows reduced nuclear staining intensity in hippocampal neurons of EGCG-treated rats.

micrograph

Figure 375

Total antioxidant capacity (TAC) measurements in brain tissue demonstrate preservation of redox homeostasis with green tea extract pretreatment.

chart

Figure 376

Escape latency measurements from the Morris water maze test indicate that rats treated with green tea extract (GTex) and EGCG demonstrated significantly improved spatial learning compared to the ischemic control group.

chart

Figure 377

Swimming path length data from the Morris water maze reveal that EGCG-treated ischemic rats navigated more efficiently to the platform, suggesting preserved spatial memory function.

chart

Figure 378

Time spent in the target quadrant during the Morris water maze probe trial was significantly greater in GTex-treated rats, indicating enhanced memory retention following cerebral ischemia.

chart

Figure 379

Latency to reach the hidden platform across training days shows a steeper learning curve in EGCG and pentoxifylline (PTX) groups compared to untreated ischemic rats.

chart

Figure 380

Representative swimming trajectories from the Morris water maze demonstrate more directed search patterns in green tea extract-treated rats versus erratic paths in ischemic controls.

diagram

Figure 381

Malondialdehyde (MDA) levels in brain tissue homogenates were markedly reduced in rats receiving green tea extract pretreatment, suggesting attenuation of lipid peroxidation after ischemic injury.

chart

Figure 382

Comparison of MDA concentrations across treatment groups indicates that both GTex and EGCG significantly decreased oxidative stress markers relative to the ischemia-only group.

chart

Figure 383

Brain tissue MDA levels measured at different time points post-ischemia show sustained antioxidant effects in the EGCG-treated group compared to vehicle controls.

chart

Figure 384

Superoxide dismutase (SOD) activity in brain homogenates was significantly preserved in GTex-treated ischemic rats, indicating protection of endogenous antioxidant defenses.

chart

Figure 385

Catalase enzyme activity levels across experimental groups demonstrate that EGCG pretreatment maintained antioxidant capacity following middle cerebral artery occlusion.

chart

Figure 386

Glutathione peroxidase (GPx) activity measurements reveal that green tea polyphenols helped maintain redox balance in ischemic brain tissue.

chart

Figure 387

Pro-inflammatory cytokine levels (TNF-alpha, IL-1beta) in ischemic brain tissue were significantly lower in rats pretreated with EGCG, suggesting anti-neuroinflammatory effects.

chart

Figure 388

NF-kappaB expression levels in brain tissue sections indicate reduced inflammatory signaling in the green tea extract treatment group following cerebral ischemia.

chart

Figure 389

Quantification of inflammatory cell infiltration shows fewer activated microglia in EGCG-treated rats compared to the ischemic control group.

chart

Figure 390

COX-2 expression measured by Western blot analysis was attenuated in GTex-treated ischemic rats, consistent with reduced neuroinflammation.

chart

Figure 391

Coronal brain section from a sham-operated rat shows intact neuronal architecture in the hippocampal CA1 region with no signs of ischemic damage.

micrograph

Figure 392

Histological section of hippocampal tissue from an ischemic control rat reveals extensive neuronal cell death and pyknotic nuclei in the CA1 subfield.

micrograph

Figure 393

Brain tissue section from an EGCG-treated rat shows preserved hippocampal neuronal morphology with markedly less ischemic damage compared to untreated controls.

micrograph

Figure 394

Nissl-stained hippocampal sections demonstrate significantly more surviving neurons in the CA1 region of GTex-treated rats following cerebral ischemia.

micrograph

Figure 395

Higher magnification view of the hippocampal CA1 region reveals intact pyramidal cell layers in green tea extract-treated ischemic rats.

micrograph

Figure 396

Representative brain section showing the extent of infarct area, with TTC staining revealing reduced infarct volume in the EGCG pretreatment group.

micrograph

Figure 397

Cortical tissue section from an ischemic rat displays marked neuronal degeneration, characterized by shrunken cell bodies and darkly stained nuclei.

micrograph

Figure 398

Immunohistochemical staining for GFAP in the peri-infarct region shows reduced astrocyte activation in GTex-treated rats.

micrograph

Figure 399

Western blot bands for phospho-Akt and total Akt in hippocampal lysates suggest activation of the PI3K/Akt survival pathway in EGCG-treated ischemic rats.

photograph

Figure 400

Densitometric analysis of Western blot data shows significantly increased Bcl-2/Bax ratio in green tea extract-treated rats, indicating anti-apoptotic signaling.

chart

Figure 401

Protein expression levels of iNOS and COX-2 measured by immunoblotting were reduced in the EGCG group, supporting the anti-inflammatory mechanism of green tea polyphenols.

photograph

Figure 402

Western blot analysis of NF-kappaB p65 subunit translocation reveals attenuated nuclear accumulation in GTex-pretreated ischemic brain tissue.

photograph

Figure 403

Infarct volume quantification by TTC staining demonstrates a significant reduction in brain infarct size in rats receiving green tea extract prior to middle cerebral artery ligation.

chart

Figure 404

Representative TTC-stained coronal brain slices from each experimental group illustrate the dose-dependent neuroprotective effect of EGCG on infarct size.

photograph

Figure 405

Bar graph comparing mean infarct volumes shows that both GTex and EGCG treatments resulted in significantly smaller ischemic lesions than vehicle control.

chart

Figure 406

TUNEL staining of hippocampal sections reveals fewer apoptotic neurons in the EGCG-treated group, suggesting neuroprotection against ischemia-induced cell death.

micrograph

Figure 407

Quantification of TUNEL-positive cells in the peri-infarct cortex indicates that green tea extract pretreatment significantly reduced neuronal apoptosis.

chart

Figure 408

Caspase-3 immunoreactivity in the ischemic penumbra was markedly reduced in GTex-treated rats, consistent with attenuated apoptotic signaling.

micrograph

Figure 409

Neurological deficit scores assessed at 24 hours post-ischemia were significantly lower in the EGCG and GTex groups, indicating better functional outcomes.

chart

Figure 410

Composite neurological function scores across treatment groups demonstrate dose-dependent improvement with EGCG administration before ischemic injury.

chart

Figure 411

Body weight changes over the experimental period show that green tea extract-treated rats maintained closer-to-normal weight compared to untreated ischemic animals.

chart

Figure 412

Experimental timeline illustrating the sequence of green tea extract administration, middle cerebral artery ligation, and behavioral testing in the Morris water maze.

diagram

Figure 413

Schematic diagram of the study design showing group allocation, treatment protocol, and outcome measurement timepoints for the cerebral ischemia model.

flowchart

Figure 414

Regional cerebral blood flow measurements indicate that EGCG pretreatment did not significantly alter perfusion patterns during middle cerebral artery occlusion.

chart

Figure 415

Immunofluorescence staining of brain tissue shows reduced microglial activation (Iba-1 positive cells) in the peri-infarct region of GTex-treated rats.

micrograph

Figure 416

Quantitative analysis of surviving neurons in the hippocampal CA1 region reveals a significantly higher neuronal density in EGCG-treated versus ischemic control animals.

chart

Figure 417

Dose-response relationship between EGCG concentration and MDA reduction suggests optimal neuroprotection at the tested pretreatment dose.

chart

Figure 418

Representative photomicrographs of Fluoro-Jade B staining demonstrate fewer degenerating neurons in the cortex of green tea extract-treated ischemic rats.

micrograph

Figure 419

Brain edema quantification based on wet-dry weight ratios indicates reduced cerebral swelling in the EGCG pretreatment group following ischemia.

chart

Figure 420

Correlation analysis between escape latency in the Morris water maze and hippocampal MDA levels suggests that oxidative stress is associated with memory impairment severity.

chart

Figure 421

Cytochrome c release from mitochondria was attenuated in the EGCG group, as shown by Western blot analysis of cytosolic and mitochondrial fractions.

photograph

Figure 422

Heat map of gene expression changes in the ischemic penumbra reveals upregulation of antioxidant response elements in GTex-pretreated rats.

chart

Figure 423

Comparative analysis of platform crossings during the probe trial indicates significantly better spatial memory recall in both EGCG and PTX groups.

chart

Figure 424

Immunohistochemical detection of 8-OHdG (oxidative DNA damage marker) shows reduced nuclear staining intensity in hippocampal neurons of EGCG-treated rats.

micrograph

Figure 425

Total antioxidant capacity (TAC) measurements in brain tissue demonstrate preservation of redox homeostasis with green tea extract pretreatment.

chart

Figure 426

Escape latency measurements from the Morris water maze test indicate that rats treated with green tea extract (GTex) and EGCG demonstrated significantly improved spatial learning compared to the ischemic control group.

chart

Figure 427

Swimming path length data from the Morris water maze reveal that EGCG-treated ischemic rats navigated more efficiently to the platform, suggesting preserved spatial memory function.

chart

Figure 428

Time spent in the target quadrant during the Morris water maze probe trial was significantly greater in GTex-treated rats, indicating enhanced memory retention following cerebral ischemia.

chart

Figure 429

Latency to reach the hidden platform across training days shows a steeper learning curve in EGCG and pentoxifylline (PTX) groups compared to untreated ischemic rats.

chart

Figure 430

Representative swimming trajectories from the Morris water maze demonstrate more directed search patterns in green tea extract-treated rats versus erratic paths in ischemic controls.

diagram

Figure 431

Malondialdehyde (MDA) levels in brain tissue homogenates were markedly reduced in rats receiving green tea extract pretreatment, suggesting attenuation of lipid peroxidation after ischemic injury.

chart

Figure 432

Comparison of MDA concentrations across treatment groups indicates that both GTex and EGCG significantly decreased oxidative stress markers relative to the ischemia-only group.

chart

Figure 433

Brain tissue MDA levels measured at different time points post-ischemia show sustained antioxidant effects in the EGCG-treated group compared to vehicle controls.

chart

Figure 434

Superoxide dismutase (SOD) activity in brain homogenates was significantly preserved in GTex-treated ischemic rats, indicating protection of endogenous antioxidant defenses.

chart

Figure 435

Catalase enzyme activity levels across experimental groups demonstrate that EGCG pretreatment maintained antioxidant capacity following middle cerebral artery occlusion.

chart

Figure 436

Glutathione peroxidase (GPx) activity measurements reveal that green tea polyphenols helped maintain redox balance in ischemic brain tissue.

chart

Figure 437

Pro-inflammatory cytokine levels (TNF-alpha, IL-1beta) in ischemic brain tissue were significantly lower in rats pretreated with EGCG, suggesting anti-neuroinflammatory effects.

chart

Figure 438

NF-kappaB expression levels in brain tissue sections indicate reduced inflammatory signaling in the green tea extract treatment group following cerebral ischemia.

chart

Figure 439

Quantification of inflammatory cell infiltration shows fewer activated microglia in EGCG-treated rats compared to the ischemic control group.

chart

Figure 440

COX-2 expression measured by Western blot analysis was attenuated in GTex-treated ischemic rats, consistent with reduced neuroinflammation.

chart

Figure 441

Coronal brain section from a sham-operated rat shows intact neuronal architecture in the hippocampal CA1 region with no signs of ischemic damage.

micrograph

Figure 442

Histological section of hippocampal tissue from an ischemic control rat reveals extensive neuronal cell death and pyknotic nuclei in the CA1 subfield.

micrograph

Figure 443

Brain tissue section from an EGCG-treated rat shows preserved hippocampal neuronal morphology with markedly less ischemic damage compared to untreated controls.

micrograph

Figure 444

Nissl-stained hippocampal sections demonstrate significantly more surviving neurons in the CA1 region of GTex-treated rats following cerebral ischemia.

micrograph

Figure 445

Higher magnification view of the hippocampal CA1 region reveals intact pyramidal cell layers in green tea extract-treated ischemic rats.

micrograph

Figure 446

Representative brain section showing the extent of infarct area, with TTC staining revealing reduced infarct volume in the EGCG pretreatment group.

micrograph

Figure 447

Cortical tissue section from an ischemic rat displays marked neuronal degeneration, characterized by shrunken cell bodies and darkly stained nuclei.

micrograph

Figure 448

Immunohistochemical staining for GFAP in the peri-infarct region shows reduced astrocyte activation in GTex-treated rats.

micrograph

Figure 449

Western blot bands for phospho-Akt and total Akt in hippocampal lysates suggest activation of the PI3K/Akt survival pathway in EGCG-treated ischemic rats.

photograph

Figure 450

Densitometric analysis of Western blot data shows significantly increased Bcl-2/Bax ratio in green tea extract-treated rats, indicating anti-apoptotic signaling.

chart

Figure 451

Protein expression levels of iNOS and COX-2 measured by immunoblotting were reduced in the EGCG group, supporting the anti-inflammatory mechanism of green tea polyphenols.

photograph

Figure 452

Western blot analysis of NF-kappaB p65 subunit translocation reveals attenuated nuclear accumulation in GTex-pretreated ischemic brain tissue.

photograph

Figure 453

Infarct volume quantification by TTC staining demonstrates a significant reduction in brain infarct size in rats receiving green tea extract prior to middle cerebral artery ligation.

chart

Figure 454

Representative TTC-stained coronal brain slices from each experimental group illustrate the dose-dependent neuroprotective effect of EGCG on infarct size.

photograph

Figure 455

Bar graph comparing mean infarct volumes shows that both GTex and EGCG treatments resulted in significantly smaller ischemic lesions than vehicle control.

chart

Figure 456

TUNEL staining of hippocampal sections reveals fewer apoptotic neurons in the EGCG-treated group, suggesting neuroprotection against ischemia-induced cell death.

micrograph

Figure 457

Quantification of TUNEL-positive cells in the peri-infarct cortex indicates that green tea extract pretreatment significantly reduced neuronal apoptosis.

chart

Figure 458

Caspase-3 immunoreactivity in the ischemic penumbra was markedly reduced in GTex-treated rats, consistent with attenuated apoptotic signaling.

micrograph

Figure 459

Neurological deficit scores assessed at 24 hours post-ischemia were significantly lower in the EGCG and GTex groups, indicating better functional outcomes.

chart

Figure 460

Composite neurological function scores across treatment groups demonstrate dose-dependent improvement with EGCG administration before ischemic injury.

chart

Figure 461

Body weight changes over the experimental period show that green tea extract-treated rats maintained closer-to-normal weight compared to untreated ischemic animals.

chart

Figure 462

Experimental timeline illustrating the sequence of green tea extract administration, middle cerebral artery ligation, and behavioral testing in the Morris water maze.

diagram

Figure 463

Schematic diagram of the study design showing group allocation, treatment protocol, and outcome measurement timepoints for the cerebral ischemia model.

flowchart

Figure 464

Regional cerebral blood flow measurements indicate that EGCG pretreatment did not significantly alter perfusion patterns during middle cerebral artery occlusion.

chart

Figure 465

Immunofluorescence staining of brain tissue shows reduced microglial activation (Iba-1 positive cells) in the peri-infarct region of GTex-treated rats.

micrograph

Figure 466

Quantitative analysis of surviving neurons in the hippocampal CA1 region reveals a significantly higher neuronal density in EGCG-treated versus ischemic control animals.

chart

Figure 467

Dose-response relationship between EGCG concentration and MDA reduction suggests optimal neuroprotection at the tested pretreatment dose.

chart

Figure 468

Representative photomicrographs of Fluoro-Jade B staining demonstrate fewer degenerating neurons in the cortex of green tea extract-treated ischemic rats.

micrograph

Figure 469

Brain edema quantification based on wet-dry weight ratios indicates reduced cerebral swelling in the EGCG pretreatment group following ischemia.

chart

Figure 470

Correlation analysis between escape latency in the Morris water maze and hippocampal MDA levels suggests that oxidative stress is associated with memory impairment severity.

chart

Figure 471

Cytochrome c release from mitochondria was attenuated in the EGCG group, as shown by Western blot analysis of cytosolic and mitochondrial fractions.

photograph

Figure 472

Heat map of gene expression changes in the ischemic penumbra reveals upregulation of antioxidant response elements in GTex-pretreated rats.

chart

Figure 473

Comparative analysis of platform crossings during the probe trial indicates significantly better spatial memory recall in both EGCG and PTX groups.

chart

Figure 474

Immunohistochemical detection of 8-OHdG (oxidative DNA damage marker) shows reduced nuclear staining intensity in hippocampal neurons of EGCG-treated rats.

micrograph

Figure 475

Total antioxidant capacity (TAC) measurements in brain tissue demonstrate preservation of redox homeostasis with green tea extract pretreatment.

chart

Figure 476

Escape latency measurements from the Morris water maze test indicate that rats treated with green tea extract (GTex) and EGCG demonstrated significantly improved spatial learning compared to the ischemic control group.

chart

Figure 477

Swimming path length data from the Morris water maze reveal that EGCG-treated ischemic rats navigated more efficiently to the platform, suggesting preserved spatial memory function.

chart

Figure 478

Time spent in the target quadrant during the Morris water maze probe trial was significantly greater in GTex-treated rats, indicating enhanced memory retention following cerebral ischemia.

chart

Figure 479

Latency to reach the hidden platform across training days shows a steeper learning curve in EGCG and pentoxifylline (PTX) groups compared to untreated ischemic rats.

chart

Figure 480

Representative swimming trajectories from the Morris water maze demonstrate more directed search patterns in green tea extract-treated rats versus erratic paths in ischemic controls.

diagram

Figure 481

Malondialdehyde (MDA) levels in brain tissue homogenates were markedly reduced in rats receiving green tea extract pretreatment, suggesting attenuation of lipid peroxidation after ischemic injury.

chart

Figure 482

Comparison of MDA concentrations across treatment groups indicates that both GTex and EGCG significantly decreased oxidative stress markers relative to the ischemia-only group.

chart

Figure 483

Brain tissue MDA levels measured at different time points post-ischemia show sustained antioxidant effects in the EGCG-treated group compared to vehicle controls.

chart

Figure 484

Superoxide dismutase (SOD) activity in brain homogenates was significantly preserved in GTex-treated ischemic rats, indicating protection of endogenous antioxidant defenses.

chart

Figure 485

Catalase enzyme activity levels across experimental groups demonstrate that EGCG pretreatment maintained antioxidant capacity following middle cerebral artery occlusion.

chart

Figure 486

Glutathione peroxidase (GPx) activity measurements reveal that green tea polyphenols helped maintain redox balance in ischemic brain tissue.

chart

Figure 487

Pro-inflammatory cytokine levels (TNF-alpha, IL-1beta) in ischemic brain tissue were significantly lower in rats pretreated with EGCG, suggesting anti-neuroinflammatory effects.

chart

Figure 488

NF-kappaB expression levels in brain tissue sections indicate reduced inflammatory signaling in the green tea extract treatment group following cerebral ischemia.

chart

Figure 489

Quantification of inflammatory cell infiltration shows fewer activated microglia in EGCG-treated rats compared to the ischemic control group.

chart

Figure 490

COX-2 expression measured by Western blot analysis was attenuated in GTex-treated ischemic rats, consistent with reduced neuroinflammation.

chart

Figure 491

Coronal brain section from a sham-operated rat shows intact neuronal architecture in the hippocampal CA1 region with no signs of ischemic damage.

micrograph

Figure 492

Histological section of hippocampal tissue from an ischemic control rat reveals extensive neuronal cell death and pyknotic nuclei in the CA1 subfield.

micrograph

Figure 493

Brain tissue section from an EGCG-treated rat shows preserved hippocampal neuronal morphology with markedly less ischemic damage compared to untreated controls.

micrograph

Figure 494

Nissl-stained hippocampal sections demonstrate significantly more surviving neurons in the CA1 region of GTex-treated rats following cerebral ischemia.

micrograph

Figure 495

Higher magnification view of the hippocampal CA1 region reveals intact pyramidal cell layers in green tea extract-treated ischemic rats.

micrograph

Figure 496

Representative brain section showing the extent of infarct area, with TTC staining revealing reduced infarct volume in the EGCG pretreatment group.

micrograph

Figure 497

Cortical tissue section from an ischemic rat displays marked neuronal degeneration, characterized by shrunken cell bodies and darkly stained nuclei.

micrograph

Figure 498

Immunohistochemical staining for GFAP in the peri-infarct region shows reduced astrocyte activation in GTex-treated rats.

micrograph

Figure 499

Western blot bands for phospho-Akt and total Akt in hippocampal lysates suggest activation of the PI3K/Akt survival pathway in EGCG-treated ischemic rats.

photograph

Figure 500

Densitometric analysis of Western blot data shows significantly increased Bcl-2/Bax ratio in green tea extract-treated rats, indicating anti-apoptotic signaling.

chart

Figure 501

Protein expression levels of iNOS and COX-2 measured by immunoblotting were reduced in the EGCG group, supporting the anti-inflammatory mechanism of green tea polyphenols.

photograph

Figure 502

Western blot analysis of NF-kappaB p65 subunit translocation reveals attenuated nuclear accumulation in GTex-pretreated ischemic brain tissue.

photograph

Figure 503

Infarct volume quantification by TTC staining demonstrates a significant reduction in brain infarct size in rats receiving green tea extract prior to middle cerebral artery ligation.

chart

Figure 504

Representative TTC-stained coronal brain slices from each experimental group illustrate the dose-dependent neuroprotective effect of EGCG on infarct size.

photograph

Figure 505

Bar graph comparing mean infarct volumes shows that both GTex and EGCG treatments resulted in significantly smaller ischemic lesions than vehicle control.

chart

Figure 506

TUNEL staining of hippocampal sections reveals fewer apoptotic neurons in the EGCG-treated group, suggesting neuroprotection against ischemia-induced cell death.

micrograph

Figure 507

Quantification of TUNEL-positive cells in the peri-infarct cortex indicates that green tea extract pretreatment significantly reduced neuronal apoptosis.

chart

Figure 508

Caspase-3 immunoreactivity in the ischemic penumbra was markedly reduced in GTex-treated rats, consistent with attenuated apoptotic signaling.

micrograph

Figure 509

Neurological deficit scores assessed at 24 hours post-ischemia were significantly lower in the EGCG and GTex groups, indicating better functional outcomes.

chart

Figure 510

Composite neurological function scores across treatment groups demonstrate dose-dependent improvement with EGCG administration before ischemic injury.

chart

Figure 511

Body weight changes over the experimental period show that green tea extract-treated rats maintained closer-to-normal weight compared to untreated ischemic animals.

chart

Figure 512

Experimental timeline illustrating the sequence of green tea extract administration, middle cerebral artery ligation, and behavioral testing in the Morris water maze.

diagram

Figure 513

Schematic diagram of the study design showing group allocation, treatment protocol, and outcome measurement timepoints for the cerebral ischemia model.

flowchart

Figure 514

Regional cerebral blood flow measurements indicate that EGCG pretreatment did not significantly alter perfusion patterns during middle cerebral artery occlusion.

chart

Figure 515

Immunofluorescence staining of brain tissue shows reduced microglial activation (Iba-1 positive cells) in the peri-infarct region of GTex-treated rats.

micrograph

Figure 516

Quantitative analysis of surviving neurons in the hippocampal CA1 region reveals a significantly higher neuronal density in EGCG-treated versus ischemic control animals.

chart

Figure 517

Dose-response relationship between EGCG concentration and MDA reduction suggests optimal neuroprotection at the tested pretreatment dose.

chart

Figure 518

Representative photomicrographs of Fluoro-Jade B staining demonstrate fewer degenerating neurons in the cortex of green tea extract-treated ischemic rats.

micrograph

Figure 519

Brain edema quantification based on wet-dry weight ratios indicates reduced cerebral swelling in the EGCG pretreatment group following ischemia.

chart

Figure 520

Correlation analysis between escape latency in the Morris water maze and hippocampal MDA levels suggests that oxidative stress is associated with memory impairment severity.

chart

Figure 521

Cytochrome c release from mitochondria was attenuated in the EGCG group, as shown by Western blot analysis of cytosolic and mitochondrial fractions.

photograph

Figure 522

Heat map of gene expression changes in the ischemic penumbra reveals upregulation of antioxidant response elements in GTex-pretreated rats.

chart

Figure 523

Comparative analysis of platform crossings during the probe trial indicates significantly better spatial memory recall in both EGCG and PTX groups.

chart

Figure 524

Immunohistochemical detection of 8-OHdG (oxidative DNA damage marker) shows reduced nuclear staining intensity in hippocampal neurons of EGCG-treated rats.

micrograph

Figure 525

Total antioxidant capacity (TAC) measurements in brain tissue demonstrate preservation of redox homeostasis with green tea extract pretreatment.

chart

Figure 526

Escape latency measurements from the Morris water maze test indicate that rats treated with green tea extract (GTex) and EGCG demonstrated significantly improved spatial learning compared to the ischemic control group.

chart

Figure 527

Swimming path length data from the Morris water maze reveal that EGCG-treated ischemic rats navigated more efficiently to the platform, suggesting preserved spatial memory function.

chart

Figure 528

Time spent in the target quadrant during the Morris water maze probe trial was significantly greater in GTex-treated rats, indicating enhanced memory retention following cerebral ischemia.

chart

Figure 529

Latency to reach the hidden platform across training days shows a steeper learning curve in EGCG and pentoxifylline (PTX) groups compared to untreated ischemic rats.

chart

Figure 530

Representative swimming trajectories from the Morris water maze demonstrate more directed search patterns in green tea extract-treated rats versus erratic paths in ischemic controls.

diagram

Figure 531

Malondialdehyde (MDA) levels in brain tissue homogenates were markedly reduced in rats receiving green tea extract pretreatment, suggesting attenuation of lipid peroxidation after ischemic injury.

chart

Figure 532

Comparison of MDA concentrations across treatment groups indicates that both GTex and EGCG significantly decreased oxidative stress markers relative to the ischemia-only group.

chart

Figure 533

Brain tissue MDA levels measured at different time points post-ischemia show sustained antioxidant effects in the EGCG-treated group compared to vehicle controls.

chart

Figure 534

Superoxide dismutase (SOD) activity in brain homogenates was significantly preserved in GTex-treated ischemic rats, indicating protection of endogenous antioxidant defenses.

chart

Figure 535

Catalase enzyme activity levels across experimental groups demonstrate that EGCG pretreatment maintained antioxidant capacity following middle cerebral artery occlusion.

chart

Figure 536

Glutathione peroxidase (GPx) activity measurements reveal that green tea polyphenols helped maintain redox balance in ischemic brain tissue.

chart

Figure 537

Pro-inflammatory cytokine levels (TNF-alpha, IL-1beta) in ischemic brain tissue were significantly lower in rats pretreated with EGCG, suggesting anti-neuroinflammatory effects.

chart

Figure 538

NF-kappaB expression levels in brain tissue sections indicate reduced inflammatory signaling in the green tea extract treatment group following cerebral ischemia.

chart

Figure 539

Quantification of inflammatory cell infiltration shows fewer activated microglia in EGCG-treated rats compared to the ischemic control group.

chart

Figure 540

COX-2 expression measured by Western blot analysis was attenuated in GTex-treated ischemic rats, consistent with reduced neuroinflammation.

chart

Figure 541

Coronal brain section from a sham-operated rat shows intact neuronal architecture in the hippocampal CA1 region with no signs of ischemic damage.

micrograph

Figure 542

Histological section of hippocampal tissue from an ischemic control rat reveals extensive neuronal cell death and pyknotic nuclei in the CA1 subfield.

micrograph

Figure 543

Brain tissue section from an EGCG-treated rat shows preserved hippocampal neuronal morphology with markedly less ischemic damage compared to untreated controls.

micrograph

Figure 544

Nissl-stained hippocampal sections demonstrate significantly more surviving neurons in the CA1 region of GTex-treated rats following cerebral ischemia.

micrograph

Figure 545

Higher magnification view of the hippocampal CA1 region reveals intact pyramidal cell layers in green tea extract-treated ischemic rats.

micrograph

Figure 546

Representative brain section showing the extent of infarct area, with TTC staining revealing reduced infarct volume in the EGCG pretreatment group.

micrograph

Figure 547

Cortical tissue section from an ischemic rat displays marked neuronal degeneration, characterized by shrunken cell bodies and darkly stained nuclei.

micrograph

Figure 548

Immunohistochemical staining for GFAP in the peri-infarct region shows reduced astrocyte activation in GTex-treated rats.

micrograph

Figure 549

Western blot bands for phospho-Akt and total Akt in hippocampal lysates suggest activation of the PI3K/Akt survival pathway in EGCG-treated ischemic rats.

photograph

Figure 550

Densitometric analysis of Western blot data shows significantly increased Bcl-2/Bax ratio in green tea extract-treated rats, indicating anti-apoptotic signaling.

chart

Figure 551

Protein expression levels of iNOS and COX-2 measured by immunoblotting were reduced in the EGCG group, supporting the anti-inflammatory mechanism of green tea polyphenols.

photograph

Figure 552

Western blot analysis of NF-kappaB p65 subunit translocation reveals attenuated nuclear accumulation in GTex-pretreated ischemic brain tissue.

photograph

Figure 553

Infarct volume quantification by TTC staining demonstrates a significant reduction in brain infarct size in rats receiving green tea extract prior to middle cerebral artery ligation.

chart

Figure 554

Representative TTC-stained coronal brain slices from each experimental group illustrate the dose-dependent neuroprotective effect of EGCG on infarct size.

photograph

Figure 555

Bar graph comparing mean infarct volumes shows that both GTex and EGCG treatments resulted in significantly smaller ischemic lesions than vehicle control.

chart

Figure 556

TUNEL staining of hippocampal sections reveals fewer apoptotic neurons in the EGCG-treated group, suggesting neuroprotection against ischemia-induced cell death.

micrograph

Figure 557

Quantification of TUNEL-positive cells in the peri-infarct cortex indicates that green tea extract pretreatment significantly reduced neuronal apoptosis.

chart

Figure 558

Caspase-3 immunoreactivity in the ischemic penumbra was markedly reduced in GTex-treated rats, consistent with attenuated apoptotic signaling.

micrograph

Figure 559

Neurological deficit scores assessed at 24 hours post-ischemia were significantly lower in the EGCG and GTex groups, indicating better functional outcomes.

chart

Figure 560

Composite neurological function scores across treatment groups demonstrate dose-dependent improvement with EGCG administration before ischemic injury.

chart

Figure 561

Body weight changes over the experimental period show that green tea extract-treated rats maintained closer-to-normal weight compared to untreated ischemic animals.

chart

Figure 562

Experimental timeline illustrating the sequence of green tea extract administration, middle cerebral artery ligation, and behavioral testing in the Morris water maze.

diagram

Figure 563

Schematic diagram of the study design showing group allocation, treatment protocol, and outcome measurement timepoints for the cerebral ischemia model.

flowchart

Figure 564

Regional cerebral blood flow measurements indicate that EGCG pretreatment did not significantly alter perfusion patterns during middle cerebral artery occlusion.

chart

Figure 565

Immunofluorescence staining of brain tissue shows reduced microglial activation (Iba-1 positive cells) in the peri-infarct region of GTex-treated rats.

micrograph

Figure 566

Quantitative analysis of surviving neurons in the hippocampal CA1 region reveals a significantly higher neuronal density in EGCG-treated versus ischemic control animals.

chart

Figure 567

Dose-response relationship between EGCG concentration and MDA reduction suggests optimal neuroprotection at the tested pretreatment dose.

chart

Figure 568

Representative photomicrographs of Fluoro-Jade B staining demonstrate fewer degenerating neurons in the cortex of green tea extract-treated ischemic rats.

micrograph

Figure 569

Brain edema quantification based on wet-dry weight ratios indicates reduced cerebral swelling in the EGCG pretreatment group following ischemia.

chart

Figure 570

Correlation analysis between escape latency in the Morris water maze and hippocampal MDA levels suggests that oxidative stress is associated with memory impairment severity.

chart

Figure 571

Cytochrome c release from mitochondria was attenuated in the EGCG group, as shown by Western blot analysis of cytosolic and mitochondrial fractions.

photograph

Figure 572

Heat map of gene expression changes in the ischemic penumbra reveals upregulation of antioxidant response elements in GTex-pretreated rats.

chart

Figure 573

Comparative analysis of platform crossings during the probe trial indicates significantly better spatial memory recall in both EGCG and PTX groups.

chart

Figure 574

Immunohistochemical detection of 8-OHdG (oxidative DNA damage marker) shows reduced nuclear staining intensity in hippocampal neurons of EGCG-treated rats.

micrograph

Figure 575

Total antioxidant capacity (TAC) measurements in brain tissue demonstrate preservation of redox homeostasis with green tea extract pretreatment.

chart

Figure 576

Behavioral assessment data from ischemic rats treated with green tea extract (GTex) or EGCG, evaluating learning and memory performance after cerebral ischemia induction.

chart

Figure 577

Quantitative analysis of memory function in rats following ischemic stroke, comparing green tea extract and EGCG treatment groups against vehicle controls.

chart

Figure 578

Morris water maze performance metrics for ischemic rats, illustrating spatial learning and memory outcomes across green tea polyphenol treatment conditions.

chart

Figure 579

Oxidative stress biomarker levels in brain tissue of ischemic rats, measuring the antioxidant effects of green tea extract and EGCG supplementation.

chart

Figure 580

Measurement of reactive oxygen species and lipid peroxidation markers in cerebral tissue, comparing EGCG-treated and untreated ischemic rat groups.

chart

Figure 581

Antioxidant enzyme activity levels in brain homogenates from ischemic rats receiving green tea extract or EGCG treatment.

chart

Figure 582

Neuroinflammatory marker expression in ischemic brain tissue, assessing the anti-inflammatory properties of EGCG and green tea extract.

chart

Figure 583

Pro-inflammatory cytokine levels measured in brain tissue following cerebral ischemia, with and without green tea polyphenol intervention.

chart

Figure 584

Inflammatory pathway activation analysis in ischemic rat brain, demonstrating modulation by green tea extract components.

chart

Figure 585

Histological examination of brain tissue from ischemic rats, comparing neuronal damage between green tea extract-treated and control groups.

micrograph

Figure 586

Brain tissue section showing the extent of ischemic damage and neuronal preservation in rats treated with EGCG.

micrograph

Figure 587

Microscopic analysis of cerebral cortex tissue, illustrating the neuroprotective effects of green tea polyphenols against ischemic injury.

micrograph

Figure 588

Western blot or protein expression analysis from ischemic rat brain tissue, evaluating molecular targets of green tea extract and EGCG.

chart

Figure 589

Signaling pathway protein quantification in brain tissue, showing how EGCG modulates oxidative stress and inflammatory cascades after ischemia.

chart

Figure 590

Gene or protein expression data from cerebral tissue of ischemic rats, comparing the molecular effects of green tea extract treatment.

chart

Figure 591

Experimental data from the ischemic stroke rat model examining the dose-dependent neuroprotective effects of green tea polyphenol EGCG.

chart

Figure 592

Quantitative outcome measures from rats with induced cerebral ischemia, comparing green tea extract efficacy in reducing brain damage.

chart

Figure 593

Biochemical analysis of brain tissue parameters in ischemic rats, supporting the therapeutic potential of green tea-derived EGCG.

chart

Figure 594

Assessment of neurological deficit scores in ischemic rats across treatment groups receiving green tea extract or purified EGCG.

chart

Figure 595

Comparative analysis of cerebral infarct volume or edema in rats treated with green tea extract versus vehicle following ischemic injury.

chart

Figure 596

Behavioral assessment data from ischemic rats treated with green tea extract (GTex) or EGCG, evaluating learning and memory performance after cerebral ischemia induction.

chart

Figure 597

Quantitative analysis of memory function in rats following ischemic stroke, comparing green tea extract and EGCG treatment groups against vehicle controls.

chart

Figure 598

Morris water maze performance metrics for ischemic rats, illustrating spatial learning and memory outcomes across green tea polyphenol treatment conditions.

chart

Figure 599

Oxidative stress biomarker levels in brain tissue of ischemic rats, measuring the antioxidant effects of green tea extract and EGCG supplementation.

chart

Figure 600

Measurement of reactive oxygen species and lipid peroxidation markers in cerebral tissue, comparing EGCG-treated and untreated ischemic rat groups.

chart

Figure 601

Antioxidant enzyme activity levels in brain homogenates from ischemic rats receiving green tea extract or EGCG treatment.

chart

Figure 602

Neuroinflammatory marker expression in ischemic brain tissue, assessing the anti-inflammatory properties of EGCG and green tea extract.

chart

Figure 603

Pro-inflammatory cytokine levels measured in brain tissue following cerebral ischemia, with and without green tea polyphenol intervention.

chart

Figure 604

Inflammatory pathway activation analysis in ischemic rat brain, demonstrating modulation by green tea extract components.

chart

Figure 605

Histological examination of brain tissue from ischemic rats, comparing neuronal damage between green tea extract-treated and control groups.

micrograph

Figure 606

Brain tissue section showing the extent of ischemic damage and neuronal preservation in rats treated with EGCG.

micrograph

Figure 607

Microscopic analysis of cerebral cortex tissue, illustrating the neuroprotective effects of green tea polyphenols against ischemic injury.

micrograph

Figure 608

Western blot or protein expression analysis from ischemic rat brain tissue, evaluating molecular targets of green tea extract and EGCG.

chart

Figure 609

Signaling pathway protein quantification in brain tissue, showing how EGCG modulates oxidative stress and inflammatory cascades after ischemia.

chart

Figure 610

Gene or protein expression data from cerebral tissue of ischemic rats, comparing the molecular effects of green tea extract treatment.

chart

Figure 611

Experimental data from the ischemic stroke rat model examining the dose-dependent neuroprotective effects of green tea polyphenol EGCG.

chart

Figure 612

Quantitative outcome measures from rats with induced cerebral ischemia, comparing green tea extract efficacy in reducing brain damage.

chart

Figure 613

Biochemical analysis of brain tissue parameters in ischemic rats, supporting the therapeutic potential of green tea-derived EGCG.

chart

Figure 614

Assessment of neurological deficit scores in ischemic rats across treatment groups receiving green tea extract or purified EGCG.

chart

Figure 615

Comparative analysis of cerebral infarct volume or edema in rats treated with green tea extract versus vehicle following ischemic injury.

chart

Figure 616

Behavioral assessment data from ischemic rats treated with green tea extract (GTex) or EGCG, evaluating learning and memory performance after cerebral ischemia induction.

chart

Figure 617

Quantitative analysis of memory function in rats following ischemic stroke, comparing green tea extract and EGCG treatment groups against vehicle controls.

chart

Figure 618

Morris water maze performance metrics for ischemic rats, illustrating spatial learning and memory outcomes across green tea polyphenol treatment conditions.

chart

Figure 619

Oxidative stress biomarker levels in brain tissue of ischemic rats, measuring the antioxidant effects of green tea extract and EGCG supplementation.

chart

Figure 620

Measurement of reactive oxygen species and lipid peroxidation markers in cerebral tissue, comparing EGCG-treated and untreated ischemic rat groups.

chart

Figure 621

Antioxidant enzyme activity levels in brain homogenates from ischemic rats receiving green tea extract or EGCG treatment.

chart

Figure 622

Neuroinflammatory marker expression in ischemic brain tissue, assessing the anti-inflammatory properties of EGCG and green tea extract.

chart

Figure 623

Pro-inflammatory cytokine levels measured in brain tissue following cerebral ischemia, with and without green tea polyphenol intervention.

chart

Figure 624

Inflammatory pathway activation analysis in ischemic rat brain, demonstrating modulation by green tea extract components.

chart

Figure 625

Histological examination of brain tissue from ischemic rats, comparing neuronal damage between green tea extract-treated and control groups.

micrograph

Figure 626

Brain tissue section showing the extent of ischemic damage and neuronal preservation in rats treated with EGCG.

micrograph

Figure 627

Microscopic analysis of cerebral cortex tissue, illustrating the neuroprotective effects of green tea polyphenols against ischemic injury.

micrograph

Figure 628

Western blot or protein expression analysis from ischemic rat brain tissue, evaluating molecular targets of green tea extract and EGCG.

chart

Figure 629

Signaling pathway protein quantification in brain tissue, showing how EGCG modulates oxidative stress and inflammatory cascades after ischemia.

chart

Figure 630

Gene or protein expression data from cerebral tissue of ischemic rats, comparing the molecular effects of green tea extract treatment.

chart

Figure 631

Experimental data from the ischemic stroke rat model examining the dose-dependent neuroprotective effects of green tea polyphenol EGCG.

chart

Figure 632

Quantitative outcome measures from rats with induced cerebral ischemia, comparing green tea extract efficacy in reducing brain damage.

chart

Figure 633

Biochemical analysis of brain tissue parameters in ischemic rats, supporting the therapeutic potential of green tea-derived EGCG.

chart

Figure 634

Assessment of neurological deficit scores in ischemic rats across treatment groups receiving green tea extract or purified EGCG.

chart

Figure 635

Comparative analysis of cerebral infarct volume or edema in rats treated with green tea extract versus vehicle following ischemic injury.

chart

Figure 636

Behavioral assessment data from ischemic rats treated with green tea extract (GTex) or EGCG, evaluating learning and memory performance after cerebral ischemia induction.

chart

Figure 637

Quantitative analysis of memory function in rats following ischemic stroke, comparing green tea extract and EGCG treatment groups against vehicle controls.

chart

Figure 638

Morris water maze performance metrics for ischemic rats, illustrating spatial learning and memory outcomes across green tea polyphenol treatment conditions.

chart

Figure 639

Oxidative stress biomarker levels in brain tissue of ischemic rats, measuring the antioxidant effects of green tea extract and EGCG supplementation.

chart

Figure 640

Measurement of reactive oxygen species and lipid peroxidation markers in cerebral tissue, comparing EGCG-treated and untreated ischemic rat groups.

chart

Figure 641

Antioxidant enzyme activity levels in brain homogenates from ischemic rats receiving green tea extract or EGCG treatment.

chart

Figure 642

Neuroinflammatory marker expression in ischemic brain tissue, assessing the anti-inflammatory properties of EGCG and green tea extract.

chart

Figure 643

Pro-inflammatory cytokine levels measured in brain tissue following cerebral ischemia, with and without green tea polyphenol intervention.

chart

Figure 644

Inflammatory pathway activation analysis in ischemic rat brain, demonstrating modulation by green tea extract components.

chart

Figure 645

Histological examination of brain tissue from ischemic rats, comparing neuronal damage between green tea extract-treated and control groups.

micrograph

Figure 646

Brain tissue section showing the extent of ischemic damage and neuronal preservation in rats treated with EGCG.

micrograph

Figure 647

Microscopic analysis of cerebral cortex tissue, illustrating the neuroprotective effects of green tea polyphenols against ischemic injury.

micrograph

Figure 648

Western blot or protein expression analysis from ischemic rat brain tissue, evaluating molecular targets of green tea extract and EGCG.

chart

Figure 649

Signaling pathway protein quantification in brain tissue, showing how EGCG modulates oxidative stress and inflammatory cascades after ischemia.

chart

Figure 650

Gene or protein expression data from cerebral tissue of ischemic rats, comparing the molecular effects of green tea extract treatment.

chart

Figure 651

Experimental data from the ischemic stroke rat model examining the dose-dependent neuroprotective effects of green tea polyphenol EGCG.

chart

Figure 652

Quantitative outcome measures from rats with induced cerebral ischemia, comparing green tea extract efficacy in reducing brain damage.

chart

Figure 653

Biochemical analysis of brain tissue parameters in ischemic rats, supporting the therapeutic potential of green tea-derived EGCG.

chart

Figure 654

Assessment of neurological deficit scores in ischemic rats across treatment groups receiving green tea extract or purified EGCG.

chart

Figure 655

Comparative analysis of cerebral infarct volume or edema in rats treated with green tea extract versus vehicle following ischemic injury.

chart

Figure 656

Behavioral assessment data from ischemic rats treated with green tea extract (GTex) or EGCG, evaluating learning and memory performance after cerebral ischemia induction.

chart

Figure 657

Quantitative analysis of memory function in rats following ischemic stroke, comparing green tea extract and EGCG treatment groups against vehicle controls.

chart

Figure 658

Morris water maze performance metrics for ischemic rats, illustrating spatial learning and memory outcomes across green tea polyphenol treatment conditions.

chart

Figure 659

Oxidative stress biomarker levels in brain tissue of ischemic rats, measuring the antioxidant effects of green tea extract and EGCG supplementation.

chart

Figure 660

Measurement of reactive oxygen species and lipid peroxidation markers in cerebral tissue, comparing EGCG-treated and untreated ischemic rat groups.

chart

Figure 661

Antioxidant enzyme activity levels in brain homogenates from ischemic rats receiving green tea extract or EGCG treatment.

chart

Figure 662

Neuroinflammatory marker expression in ischemic brain tissue, assessing the anti-inflammatory properties of EGCG and green tea extract.

chart

Figure 663

Pro-inflammatory cytokine levels measured in brain tissue following cerebral ischemia, with and without green tea polyphenol intervention.

chart

Figure 664

Inflammatory pathway activation analysis in ischemic rat brain, demonstrating modulation by green tea extract components.

chart

Figure 665

Histological examination of brain tissue from ischemic rats, comparing neuronal damage between green tea extract-treated and control groups.

micrograph

Figure 666

Brain tissue section showing the extent of ischemic damage and neuronal preservation in rats treated with EGCG.

micrograph

Figure 667

Microscopic analysis of cerebral cortex tissue, illustrating the neuroprotective effects of green tea polyphenols against ischemic injury.

micrograph

Figure 668

Western blot or protein expression analysis from ischemic rat brain tissue, evaluating molecular targets of green tea extract and EGCG.

chart

Figure 669

Signaling pathway protein quantification in brain tissue, showing how EGCG modulates oxidative stress and inflammatory cascades after ischemia.

chart

Figure 670

Gene or protein expression data from cerebral tissue of ischemic rats, comparing the molecular effects of green tea extract treatment.

chart

Figure 671

Experimental data from the ischemic stroke rat model examining the dose-dependent neuroprotective effects of green tea polyphenol EGCG.

chart

Figure 672

Quantitative outcome measures from rats with induced cerebral ischemia, comparing green tea extract efficacy in reducing brain damage.

chart

Figure 673

Biochemical analysis of brain tissue parameters in ischemic rats, supporting the therapeutic potential of green tea-derived EGCG.

chart

Figure 674

Assessment of neurological deficit scores in ischemic rats across treatment groups receiving green tea extract or purified EGCG.

chart

Figure 675

Comparative analysis of cerebral infarct volume or edema in rats treated with green tea extract versus vehicle following ischemic injury.

chart

Figure 676

Behavioral assessment data from ischemic rats treated with green tea extract (GTex) or EGCG, evaluating learning and memory performance after cerebral ischemia induction.

chart

Figure 677

Quantitative analysis of memory function in rats following ischemic stroke, comparing green tea extract and EGCG treatment groups against vehicle controls.

chart

Figure 678

Morris water maze performance metrics for ischemic rats, illustrating spatial learning and memory outcomes across green tea polyphenol treatment conditions.

chart

Figure 679

Oxidative stress biomarker levels in brain tissue of ischemic rats, measuring the antioxidant effects of green tea extract and EGCG supplementation.

chart

Figure 680

Measurement of reactive oxygen species and lipid peroxidation markers in cerebral tissue, comparing EGCG-treated and untreated ischemic rat groups.

chart

Figure 681

Antioxidant enzyme activity levels in brain homogenates from ischemic rats receiving green tea extract or EGCG treatment.

chart

Figure 682

Neuroinflammatory marker expression in ischemic brain tissue, assessing the anti-inflammatory properties of EGCG and green tea extract.

chart

Figure 683

Pro-inflammatory cytokine levels measured in brain tissue following cerebral ischemia, with and without green tea polyphenol intervention.

chart

Figure 684

Inflammatory pathway activation analysis in ischemic rat brain, demonstrating modulation by green tea extract components.

chart

Figure 685

Histological examination of brain tissue from ischemic rats, comparing neuronal damage between green tea extract-treated and control groups.

micrograph

Figure 686

Brain tissue section showing the extent of ischemic damage and neuronal preservation in rats treated with EGCG.

micrograph

Figure 687

Microscopic analysis of cerebral cortex tissue, illustrating the neuroprotective effects of green tea polyphenols against ischemic injury.

micrograph

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