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.
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
- 2Department of Pharmacology, University of Minnesota and Geriatric Research, Education and Clinical Center, VA Medical Center, Minneapolis, MN 55455, USA
- 3Department of Pharmacology, College of Medicine, China Medical University, 91 Hsueh-Shih Road, Taichung 40402, Taiwan
- 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
- 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. 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).
- 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.
- 2.4. 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.
- 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.
- 2.6. 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).
- 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
- 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.
- 2.8.2. 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.
- 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].
- 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].
- 2.9. Cell Culture
- 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
- 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.
- 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. 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.
- 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).
- 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
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- 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).
- 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).
- 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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- 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).
- 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).
- 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%
- 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).
- 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).
- 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).
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- 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)
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(b)
(c)
- 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.
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.
diagramFigure 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.
chartFigure 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.
photographFigure 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.
chartFigure 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.
chartFigure 7
Superoxide dismutase (SOD) activity measurements in hippocampal tissue from ischemic rats, demonstrating that EGCG preserved antioxidant enzyme function following cerebral artery ligation.
chartFigure 8
Glutathione peroxidase (GPx) activity in brain homogenates from green tea extract-treated ischemic rats, indicating enhanced endogenous antioxidant defense in the treatment groups.
chartFigure 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.
chartFigure 10
Reactive oxygen species (ROS) quantification in hippocampal neurons following ischemic injury, comparing fluorescence intensity between control, ischemia, and green tea extract-treated groups.
chartFigure 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.
chartFigure 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.
chartFigure 13
Immunohistochemical staining of hippocampal CA1 neurons in ischemic rats, revealing that green tea extract pretreatment preserved neuronal density and reduced apoptotic cell counts.
micrographFigure 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.
micrographFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 18
Immunohistochemical staining of hippocampal CA1 neurons in ischemic rats, revealing that green tea extract pretreatment preserved neuronal density and reduced apoptotic cell counts.
micrographFigure 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.
micrographFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
micrographFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
micrographFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
micrographFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
micrographFigure 44
Blood-brain barrier integrity assessment using Evans blue extravasation in ischemic rats, indicating that green tea polyphenol pretreatment attenuated BBB permeability after stroke.
chartFigure 45
Cerebral blood flow measurements during and after middle cerebral artery occlusion, comparing laser Doppler flowmetry readings between treatment and control groups.
chartFigure 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.
chartFigure 47
Mitochondrial membrane potential measurements in hippocampal neurons from ischemic rats, assessed via JC-1 staining, showing preservation of mitochondrial function with EGCG pretreatment.
chartFigure 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.
chartFigure 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.
chartFigure 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.
micrographFigure 51
Blood-brain barrier integrity assessment using Evans blue extravasation in ischemic rats, indicating that green tea polyphenol pretreatment attenuated BBB permeability after stroke.
chartFigure 52
Cerebral blood flow measurements during and after middle cerebral artery occlusion, comparing laser Doppler flowmetry readings between treatment and control groups.
chartFigure 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.
chartFigure 54
Mitochondrial membrane potential measurements in hippocampal neurons from ischemic rats, assessed via JC-1 staining, showing preservation of mitochondrial function with EGCG pretreatment.
chartFigure 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.
chartFigure 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.
chartFigure 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.
micrographFigure 58
Blood-brain barrier integrity assessment using Evans blue extravasation in ischemic rats, indicating that green tea polyphenol pretreatment attenuated BBB permeability after stroke.
chartFigure 59
Cerebral blood flow measurements during and after middle cerebral artery occlusion, comparing laser Doppler flowmetry readings between treatment and control groups.
chartFigure 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.
chartFigure 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.
micrographFigure 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.
chartFigure 63
Synaptic density quantification using synaptophysin immunostaining in hippocampal tissue from ischemic rats, suggesting that EGCG treatment helped maintain synaptic integrity.
micrographFigure 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.
chartFigure 65
Astrocyte activation assessment via GFAP immunostaining in the peri-infarct region, demonstrating reduced reactive gliosis in green tea extract-pretreated ischemic rats.
micrographFigure 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.
chartFigure 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.
chartFigure 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.
micrographFigure 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.
chartFigure 70
Synaptic density quantification using synaptophysin immunostaining in hippocampal tissue from ischemic rats, suggesting that EGCG treatment helped maintain synaptic integrity.
micrographFigure 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.
chartFigure 72
Astrocyte activation assessment via GFAP immunostaining in the peri-infarct region, demonstrating reduced reactive gliosis in green tea extract-pretreated ischemic rats.
micrographFigure 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.
chartFigure 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.
chartFigure 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.
micrographFigure 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.
chartFigure 77
Synaptic density quantification using synaptophysin immunostaining in hippocampal tissue from ischemic rats, suggesting that EGCG treatment helped maintain synaptic integrity.
micrographFigure 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.
chartFigure 79
Astrocyte activation assessment via GFAP immunostaining in the peri-infarct region, demonstrating reduced reactive gliosis in green tea extract-pretreated ischemic rats.
micrographFigure 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.
chartFigure 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.
micrographFigure 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.
chartFigure 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.
chartFigure 84
Electron microscopy observations of mitochondrial ultrastructure in hippocampal neurons following ischemia, revealing better-preserved cristae organization in EGCG-pretreated samples.
micrographFigure 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.
chartFigure 86
Hemispheric swelling index calculated from brain section photographs, confirming reduced edema in the ipsilateral hemisphere of green tea extract-treated ischemic rats.
chartFigure 87
Correlation analysis between oxidative stress markers and behavioral outcomes in ischemic rats, showing that lower MDA levels predicted better Morris water maze performance.
chartFigure 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.
micrographFigure 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.
chartFigure 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.
chartFigure 91
Electron microscopy observations of mitochondrial ultrastructure in hippocampal neurons following ischemia, revealing better-preserved cristae organization in EGCG-pretreated samples.
micrographFigure 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.
chartFigure 93
Hemispheric swelling index calculated from brain section photographs, confirming reduced edema in the ipsilateral hemisphere of green tea extract-treated ischemic rats.
chartFigure 94
Correlation analysis between oxidative stress markers and behavioral outcomes in ischemic rats, showing that lower MDA levels predicted better Morris water maze performance.
chartFigure 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.
micrographFigure 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.
chartFigure 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.
chartFigure 98
Electron microscopy observations of mitochondrial ultrastructure in hippocampal neurons following ischemia, revealing better-preserved cristae organization in EGCG-pretreated samples.
micrographFigure 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.
chartFigure 100
Hemispheric swelling index calculated from brain section photographs, confirming reduced edema in the ipsilateral hemisphere of green tea extract-treated ischemic rats.
chartFigure 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.
chartFigure 102
Densitometric quantification of western blot bands for multiple neuroprotective proteins, presenting fold-change values relative to sham controls for each treatment condition.
chartFigure 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.
micrographFigure 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.
diagramFigure 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.
chartFigure 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.
chartFigure 109
Densitometric quantification of western blot bands for multiple neuroprotective proteins, presenting fold-change values relative to sham controls for each treatment condition.
chartFigure 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.
micrographFigure 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.
diagramFigure 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.
chartFigure 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.
chartFigure 116
Densitometric quantification of western blot bands for multiple neuroprotective proteins, presenting fold-change values relative to sham controls for each treatment condition.
chartFigure 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.
micrographFigure 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.
diagramFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
micrographFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
micrographFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
micrographFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
micrographFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
micrographFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
micrographFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
micrographFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
micrographFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
micrographFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
micrographFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
micrographFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
micrographFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
micrographFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
micrographFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
micrographFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
micrographFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
micrographFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
micrographFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
micrographFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
micrographFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
micrographFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
micrographFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
micrographFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
micrographFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
micrographFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
micrographFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
micrographFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
micrographFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
micrographFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
micrographFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
diagramFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 334
Superoxide dismutase (SOD) activity in brain homogenates was significantly preserved in GTex-treated ischemic rats, indicating protection of endogenous antioxidant defenses.
chartFigure 335
Catalase enzyme activity levels across experimental groups demonstrate that EGCG pretreatment maintained antioxidant capacity following middle cerebral artery occlusion.
chartFigure 336
Glutathione peroxidase (GPx) activity measurements reveal that green tea polyphenols helped maintain redox balance in ischemic brain tissue.
chartFigure 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.
chartFigure 338
NF-kappaB expression levels in brain tissue sections indicate reduced inflammatory signaling in the green tea extract treatment group following cerebral ischemia.
chartFigure 339
Quantification of inflammatory cell infiltration shows fewer activated microglia in EGCG-treated rats compared to the ischemic control group.
chartFigure 340
COX-2 expression measured by Western blot analysis was attenuated in GTex-treated ischemic rats, consistent with reduced neuroinflammation.
chartFigure 341
Coronal brain section from a sham-operated rat shows intact neuronal architecture in the hippocampal CA1 region with no signs of ischemic damage.
micrographFigure 342
Histological section of hippocampal tissue from an ischemic control rat reveals extensive neuronal cell death and pyknotic nuclei in the CA1 subfield.
micrographFigure 343
Brain tissue section from an EGCG-treated rat shows preserved hippocampal neuronal morphology with markedly less ischemic damage compared to untreated controls.
micrographFigure 344
Nissl-stained hippocampal sections demonstrate significantly more surviving neurons in the CA1 region of GTex-treated rats following cerebral ischemia.
micrographFigure 345
Higher magnification view of the hippocampal CA1 region reveals intact pyramidal cell layers in green tea extract-treated ischemic rats.
micrographFigure 346
Representative brain section showing the extent of infarct area, with TTC staining revealing reduced infarct volume in the EGCG pretreatment group.
micrographFigure 347
Cortical tissue section from an ischemic rat displays marked neuronal degeneration, characterized by shrunken cell bodies and darkly stained nuclei.
micrographFigure 348
Immunohistochemical staining for GFAP in the peri-infarct region shows reduced astrocyte activation in GTex-treated rats.
micrographFigure 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.
photographFigure 350
Densitometric analysis of Western blot data shows significantly increased Bcl-2/Bax ratio in green tea extract-treated rats, indicating anti-apoptotic signaling.
chartFigure 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.
photographFigure 352
Western blot analysis of NF-kappaB p65 subunit translocation reveals attenuated nuclear accumulation in GTex-pretreated ischemic brain tissue.
photographFigure 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.
chartFigure 354
Representative TTC-stained coronal brain slices from each experimental group illustrate the dose-dependent neuroprotective effect of EGCG on infarct size.
photographFigure 355
Bar graph comparing mean infarct volumes shows that both GTex and EGCG treatments resulted in significantly smaller ischemic lesions than vehicle control.
chartFigure 356
TUNEL staining of hippocampal sections reveals fewer apoptotic neurons in the EGCG-treated group, suggesting neuroprotection against ischemia-induced cell death.
micrographFigure 357
Quantification of TUNEL-positive cells in the peri-infarct cortex indicates that green tea extract pretreatment significantly reduced neuronal apoptosis.
chartFigure 358
Caspase-3 immunoreactivity in the ischemic penumbra was markedly reduced in GTex-treated rats, consistent with attenuated apoptotic signaling.
micrographFigure 359
Neurological deficit scores assessed at 24 hours post-ischemia were significantly lower in the EGCG and GTex groups, indicating better functional outcomes.
chartFigure 360
Composite neurological function scores across treatment groups demonstrate dose-dependent improvement with EGCG administration before ischemic injury.
chartFigure 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.
chartFigure 362
Experimental timeline illustrating the sequence of green tea extract administration, middle cerebral artery ligation, and behavioral testing in the Morris water maze.
diagramFigure 363
Schematic diagram of the study design showing group allocation, treatment protocol, and outcome measurement timepoints for the cerebral ischemia model.
flowchartFigure 364
Regional cerebral blood flow measurements indicate that EGCG pretreatment did not significantly alter perfusion patterns during middle cerebral artery occlusion.
chartFigure 365
Immunofluorescence staining of brain tissue shows reduced microglial activation (Iba-1 positive cells) in the peri-infarct region of GTex-treated rats.
micrographFigure 366
Quantitative analysis of surviving neurons in the hippocampal CA1 region reveals a significantly higher neuronal density in EGCG-treated versus ischemic control animals.
chartFigure 367
Dose-response relationship between EGCG concentration and MDA reduction suggests optimal neuroprotection at the tested pretreatment dose.
chartFigure 368
Representative photomicrographs of Fluoro-Jade B staining demonstrate fewer degenerating neurons in the cortex of green tea extract-treated ischemic rats.
micrographFigure 369
Brain edema quantification based on wet-dry weight ratios indicates reduced cerebral swelling in the EGCG pretreatment group following ischemia.
chartFigure 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.
chartFigure 371
Cytochrome c release from mitochondria was attenuated in the EGCG group, as shown by Western blot analysis of cytosolic and mitochondrial fractions.
photographFigure 372
Heat map of gene expression changes in the ischemic penumbra reveals upregulation of antioxidant response elements in GTex-pretreated rats.
chartFigure 373
Comparative analysis of platform crossings during the probe trial indicates significantly better spatial memory recall in both EGCG and PTX groups.
chartFigure 374
Immunohistochemical detection of 8-OHdG (oxidative DNA damage marker) shows reduced nuclear staining intensity in hippocampal neurons of EGCG-treated rats.
micrographFigure 375
Total antioxidant capacity (TAC) measurements in brain tissue demonstrate preservation of redox homeostasis with green tea extract pretreatment.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
diagramFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 384
Superoxide dismutase (SOD) activity in brain homogenates was significantly preserved in GTex-treated ischemic rats, indicating protection of endogenous antioxidant defenses.
chartFigure 385
Catalase enzyme activity levels across experimental groups demonstrate that EGCG pretreatment maintained antioxidant capacity following middle cerebral artery occlusion.
chartFigure 386
Glutathione peroxidase (GPx) activity measurements reveal that green tea polyphenols helped maintain redox balance in ischemic brain tissue.
chartFigure 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.
chartFigure 388
NF-kappaB expression levels in brain tissue sections indicate reduced inflammatory signaling in the green tea extract treatment group following cerebral ischemia.
chartFigure 389
Quantification of inflammatory cell infiltration shows fewer activated microglia in EGCG-treated rats compared to the ischemic control group.
chartFigure 390
COX-2 expression measured by Western blot analysis was attenuated in GTex-treated ischemic rats, consistent with reduced neuroinflammation.
chartFigure 391
Coronal brain section from a sham-operated rat shows intact neuronal architecture in the hippocampal CA1 region with no signs of ischemic damage.
micrographFigure 392
Histological section of hippocampal tissue from an ischemic control rat reveals extensive neuronal cell death and pyknotic nuclei in the CA1 subfield.
micrographFigure 393
Brain tissue section from an EGCG-treated rat shows preserved hippocampal neuronal morphology with markedly less ischemic damage compared to untreated controls.
micrographFigure 394
Nissl-stained hippocampal sections demonstrate significantly more surviving neurons in the CA1 region of GTex-treated rats following cerebral ischemia.
micrographFigure 395
Higher magnification view of the hippocampal CA1 region reveals intact pyramidal cell layers in green tea extract-treated ischemic rats.
micrographFigure 396
Representative brain section showing the extent of infarct area, with TTC staining revealing reduced infarct volume in the EGCG pretreatment group.
micrographFigure 397
Cortical tissue section from an ischemic rat displays marked neuronal degeneration, characterized by shrunken cell bodies and darkly stained nuclei.
micrographFigure 398
Immunohistochemical staining for GFAP in the peri-infarct region shows reduced astrocyte activation in GTex-treated rats.
micrographFigure 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.
photographFigure 400
Densitometric analysis of Western blot data shows significantly increased Bcl-2/Bax ratio in green tea extract-treated rats, indicating anti-apoptotic signaling.
chartFigure 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.
photographFigure 402
Western blot analysis of NF-kappaB p65 subunit translocation reveals attenuated nuclear accumulation in GTex-pretreated ischemic brain tissue.
photographFigure 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.
chartFigure 404
Representative TTC-stained coronal brain slices from each experimental group illustrate the dose-dependent neuroprotective effect of EGCG on infarct size.
photographFigure 405
Bar graph comparing mean infarct volumes shows that both GTex and EGCG treatments resulted in significantly smaller ischemic lesions than vehicle control.
chartFigure 406
TUNEL staining of hippocampal sections reveals fewer apoptotic neurons in the EGCG-treated group, suggesting neuroprotection against ischemia-induced cell death.
micrographFigure 407
Quantification of TUNEL-positive cells in the peri-infarct cortex indicates that green tea extract pretreatment significantly reduced neuronal apoptosis.
chartFigure 408
Caspase-3 immunoreactivity in the ischemic penumbra was markedly reduced in GTex-treated rats, consistent with attenuated apoptotic signaling.
micrographFigure 409
Neurological deficit scores assessed at 24 hours post-ischemia were significantly lower in the EGCG and GTex groups, indicating better functional outcomes.
chartFigure 410
Composite neurological function scores across treatment groups demonstrate dose-dependent improvement with EGCG administration before ischemic injury.
chartFigure 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.
chartFigure 412
Experimental timeline illustrating the sequence of green tea extract administration, middle cerebral artery ligation, and behavioral testing in the Morris water maze.
diagramFigure 413
Schematic diagram of the study design showing group allocation, treatment protocol, and outcome measurement timepoints for the cerebral ischemia model.
flowchartFigure 414
Regional cerebral blood flow measurements indicate that EGCG pretreatment did not significantly alter perfusion patterns during middle cerebral artery occlusion.
chartFigure 415
Immunofluorescence staining of brain tissue shows reduced microglial activation (Iba-1 positive cells) in the peri-infarct region of GTex-treated rats.
micrographFigure 416
Quantitative analysis of surviving neurons in the hippocampal CA1 region reveals a significantly higher neuronal density in EGCG-treated versus ischemic control animals.
chartFigure 417
Dose-response relationship between EGCG concentration and MDA reduction suggests optimal neuroprotection at the tested pretreatment dose.
chartFigure 418
Representative photomicrographs of Fluoro-Jade B staining demonstrate fewer degenerating neurons in the cortex of green tea extract-treated ischemic rats.
micrographFigure 419
Brain edema quantification based on wet-dry weight ratios indicates reduced cerebral swelling in the EGCG pretreatment group following ischemia.
chartFigure 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.
chartFigure 421
Cytochrome c release from mitochondria was attenuated in the EGCG group, as shown by Western blot analysis of cytosolic and mitochondrial fractions.
photographFigure 422
Heat map of gene expression changes in the ischemic penumbra reveals upregulation of antioxidant response elements in GTex-pretreated rats.
chartFigure 423
Comparative analysis of platform crossings during the probe trial indicates significantly better spatial memory recall in both EGCG and PTX groups.
chartFigure 424
Immunohistochemical detection of 8-OHdG (oxidative DNA damage marker) shows reduced nuclear staining intensity in hippocampal neurons of EGCG-treated rats.
micrographFigure 425
Total antioxidant capacity (TAC) measurements in brain tissue demonstrate preservation of redox homeostasis with green tea extract pretreatment.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
diagramFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 434
Superoxide dismutase (SOD) activity in brain homogenates was significantly preserved in GTex-treated ischemic rats, indicating protection of endogenous antioxidant defenses.
chartFigure 435
Catalase enzyme activity levels across experimental groups demonstrate that EGCG pretreatment maintained antioxidant capacity following middle cerebral artery occlusion.
chartFigure 436
Glutathione peroxidase (GPx) activity measurements reveal that green tea polyphenols helped maintain redox balance in ischemic brain tissue.
chartFigure 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.
chartFigure 438
NF-kappaB expression levels in brain tissue sections indicate reduced inflammatory signaling in the green tea extract treatment group following cerebral ischemia.
chartFigure 439
Quantification of inflammatory cell infiltration shows fewer activated microglia in EGCG-treated rats compared to the ischemic control group.
chartFigure 440
COX-2 expression measured by Western blot analysis was attenuated in GTex-treated ischemic rats, consistent with reduced neuroinflammation.
chartFigure 441
Coronal brain section from a sham-operated rat shows intact neuronal architecture in the hippocampal CA1 region with no signs of ischemic damage.
micrographFigure 442
Histological section of hippocampal tissue from an ischemic control rat reveals extensive neuronal cell death and pyknotic nuclei in the CA1 subfield.
micrographFigure 443
Brain tissue section from an EGCG-treated rat shows preserved hippocampal neuronal morphology with markedly less ischemic damage compared to untreated controls.
micrographFigure 444
Nissl-stained hippocampal sections demonstrate significantly more surviving neurons in the CA1 region of GTex-treated rats following cerebral ischemia.
micrographFigure 445
Higher magnification view of the hippocampal CA1 region reveals intact pyramidal cell layers in green tea extract-treated ischemic rats.
micrographFigure 446
Representative brain section showing the extent of infarct area, with TTC staining revealing reduced infarct volume in the EGCG pretreatment group.
micrographFigure 447
Cortical tissue section from an ischemic rat displays marked neuronal degeneration, characterized by shrunken cell bodies and darkly stained nuclei.
micrographFigure 448
Immunohistochemical staining for GFAP in the peri-infarct region shows reduced astrocyte activation in GTex-treated rats.
micrographFigure 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.
photographFigure 450
Densitometric analysis of Western blot data shows significantly increased Bcl-2/Bax ratio in green tea extract-treated rats, indicating anti-apoptotic signaling.
chartFigure 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.
photographFigure 452
Western blot analysis of NF-kappaB p65 subunit translocation reveals attenuated nuclear accumulation in GTex-pretreated ischemic brain tissue.
photographFigure 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.
chartFigure 454
Representative TTC-stained coronal brain slices from each experimental group illustrate the dose-dependent neuroprotective effect of EGCG on infarct size.
photographFigure 455
Bar graph comparing mean infarct volumes shows that both GTex and EGCG treatments resulted in significantly smaller ischemic lesions than vehicle control.
chartFigure 456
TUNEL staining of hippocampal sections reveals fewer apoptotic neurons in the EGCG-treated group, suggesting neuroprotection against ischemia-induced cell death.
micrographFigure 457
Quantification of TUNEL-positive cells in the peri-infarct cortex indicates that green tea extract pretreatment significantly reduced neuronal apoptosis.
chartFigure 458
Caspase-3 immunoreactivity in the ischemic penumbra was markedly reduced in GTex-treated rats, consistent with attenuated apoptotic signaling.
micrographFigure 459
Neurological deficit scores assessed at 24 hours post-ischemia were significantly lower in the EGCG and GTex groups, indicating better functional outcomes.
chartFigure 460
Composite neurological function scores across treatment groups demonstrate dose-dependent improvement with EGCG administration before ischemic injury.
chartFigure 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.
chartFigure 462
Experimental timeline illustrating the sequence of green tea extract administration, middle cerebral artery ligation, and behavioral testing in the Morris water maze.
diagramFigure 463
Schematic diagram of the study design showing group allocation, treatment protocol, and outcome measurement timepoints for the cerebral ischemia model.
flowchartFigure 464
Regional cerebral blood flow measurements indicate that EGCG pretreatment did not significantly alter perfusion patterns during middle cerebral artery occlusion.
chartFigure 465
Immunofluorescence staining of brain tissue shows reduced microglial activation (Iba-1 positive cells) in the peri-infarct region of GTex-treated rats.
micrographFigure 466
Quantitative analysis of surviving neurons in the hippocampal CA1 region reveals a significantly higher neuronal density in EGCG-treated versus ischemic control animals.
chartFigure 467
Dose-response relationship between EGCG concentration and MDA reduction suggests optimal neuroprotection at the tested pretreatment dose.
chartFigure 468
Representative photomicrographs of Fluoro-Jade B staining demonstrate fewer degenerating neurons in the cortex of green tea extract-treated ischemic rats.
micrographFigure 469
Brain edema quantification based on wet-dry weight ratios indicates reduced cerebral swelling in the EGCG pretreatment group following ischemia.
chartFigure 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.
chartFigure 471
Cytochrome c release from mitochondria was attenuated in the EGCG group, as shown by Western blot analysis of cytosolic and mitochondrial fractions.
photographFigure 472
Heat map of gene expression changes in the ischemic penumbra reveals upregulation of antioxidant response elements in GTex-pretreated rats.
chartFigure 473
Comparative analysis of platform crossings during the probe trial indicates significantly better spatial memory recall in both EGCG and PTX groups.
chartFigure 474
Immunohistochemical detection of 8-OHdG (oxidative DNA damage marker) shows reduced nuclear staining intensity in hippocampal neurons of EGCG-treated rats.
micrographFigure 475
Total antioxidant capacity (TAC) measurements in brain tissue demonstrate preservation of redox homeostasis with green tea extract pretreatment.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
diagramFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 484
Superoxide dismutase (SOD) activity in brain homogenates was significantly preserved in GTex-treated ischemic rats, indicating protection of endogenous antioxidant defenses.
chartFigure 485
Catalase enzyme activity levels across experimental groups demonstrate that EGCG pretreatment maintained antioxidant capacity following middle cerebral artery occlusion.
chartFigure 486
Glutathione peroxidase (GPx) activity measurements reveal that green tea polyphenols helped maintain redox balance in ischemic brain tissue.
chartFigure 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.
chartFigure 488
NF-kappaB expression levels in brain tissue sections indicate reduced inflammatory signaling in the green tea extract treatment group following cerebral ischemia.
chartFigure 489
Quantification of inflammatory cell infiltration shows fewer activated microglia in EGCG-treated rats compared to the ischemic control group.
chartFigure 490
COX-2 expression measured by Western blot analysis was attenuated in GTex-treated ischemic rats, consistent with reduced neuroinflammation.
chartFigure 491
Coronal brain section from a sham-operated rat shows intact neuronal architecture in the hippocampal CA1 region with no signs of ischemic damage.
micrographFigure 492
Histological section of hippocampal tissue from an ischemic control rat reveals extensive neuronal cell death and pyknotic nuclei in the CA1 subfield.
micrographFigure 493
Brain tissue section from an EGCG-treated rat shows preserved hippocampal neuronal morphology with markedly less ischemic damage compared to untreated controls.
micrographFigure 494
Nissl-stained hippocampal sections demonstrate significantly more surviving neurons in the CA1 region of GTex-treated rats following cerebral ischemia.
micrographFigure 495
Higher magnification view of the hippocampal CA1 region reveals intact pyramidal cell layers in green tea extract-treated ischemic rats.
micrographFigure 496
Representative brain section showing the extent of infarct area, with TTC staining revealing reduced infarct volume in the EGCG pretreatment group.
micrographFigure 497
Cortical tissue section from an ischemic rat displays marked neuronal degeneration, characterized by shrunken cell bodies and darkly stained nuclei.
micrographFigure 498
Immunohistochemical staining for GFAP in the peri-infarct region shows reduced astrocyte activation in GTex-treated rats.
micrographFigure 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.
photographFigure 500
Densitometric analysis of Western blot data shows significantly increased Bcl-2/Bax ratio in green tea extract-treated rats, indicating anti-apoptotic signaling.
chartFigure 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.
photographFigure 502
Western blot analysis of NF-kappaB p65 subunit translocation reveals attenuated nuclear accumulation in GTex-pretreated ischemic brain tissue.
photographFigure 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.
chartFigure 504
Representative TTC-stained coronal brain slices from each experimental group illustrate the dose-dependent neuroprotective effect of EGCG on infarct size.
photographFigure 505
Bar graph comparing mean infarct volumes shows that both GTex and EGCG treatments resulted in significantly smaller ischemic lesions than vehicle control.
chartFigure 506
TUNEL staining of hippocampal sections reveals fewer apoptotic neurons in the EGCG-treated group, suggesting neuroprotection against ischemia-induced cell death.
micrographFigure 507
Quantification of TUNEL-positive cells in the peri-infarct cortex indicates that green tea extract pretreatment significantly reduced neuronal apoptosis.
chartFigure 508
Caspase-3 immunoreactivity in the ischemic penumbra was markedly reduced in GTex-treated rats, consistent with attenuated apoptotic signaling.
micrographFigure 509
Neurological deficit scores assessed at 24 hours post-ischemia were significantly lower in the EGCG and GTex groups, indicating better functional outcomes.
chartFigure 510
Composite neurological function scores across treatment groups demonstrate dose-dependent improvement with EGCG administration before ischemic injury.
chartFigure 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.
chartFigure 512
Experimental timeline illustrating the sequence of green tea extract administration, middle cerebral artery ligation, and behavioral testing in the Morris water maze.
diagramFigure 513
Schematic diagram of the study design showing group allocation, treatment protocol, and outcome measurement timepoints for the cerebral ischemia model.
flowchartFigure 514
Regional cerebral blood flow measurements indicate that EGCG pretreatment did not significantly alter perfusion patterns during middle cerebral artery occlusion.
chartFigure 515
Immunofluorescence staining of brain tissue shows reduced microglial activation (Iba-1 positive cells) in the peri-infarct region of GTex-treated rats.
micrographFigure 516
Quantitative analysis of surviving neurons in the hippocampal CA1 region reveals a significantly higher neuronal density in EGCG-treated versus ischemic control animals.
chartFigure 517
Dose-response relationship between EGCG concentration and MDA reduction suggests optimal neuroprotection at the tested pretreatment dose.
chartFigure 518
Representative photomicrographs of Fluoro-Jade B staining demonstrate fewer degenerating neurons in the cortex of green tea extract-treated ischemic rats.
micrographFigure 519
Brain edema quantification based on wet-dry weight ratios indicates reduced cerebral swelling in the EGCG pretreatment group following ischemia.
chartFigure 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.
chartFigure 521
Cytochrome c release from mitochondria was attenuated in the EGCG group, as shown by Western blot analysis of cytosolic and mitochondrial fractions.
photographFigure 522
Heat map of gene expression changes in the ischemic penumbra reveals upregulation of antioxidant response elements in GTex-pretreated rats.
chartFigure 523
Comparative analysis of platform crossings during the probe trial indicates significantly better spatial memory recall in both EGCG and PTX groups.
chartFigure 524
Immunohistochemical detection of 8-OHdG (oxidative DNA damage marker) shows reduced nuclear staining intensity in hippocampal neurons of EGCG-treated rats.
micrographFigure 525
Total antioxidant capacity (TAC) measurements in brain tissue demonstrate preservation of redox homeostasis with green tea extract pretreatment.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 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.
diagramFigure 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.
chartFigure 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.
chartFigure 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.
chartFigure 534
Superoxide dismutase (SOD) activity in brain homogenates was significantly preserved in GTex-treated ischemic rats, indicating protection of endogenous antioxidant defenses.
chartFigure 535
Catalase enzyme activity levels across experimental groups demonstrate that EGCG pretreatment maintained antioxidant capacity following middle cerebral artery occlusion.
chartFigure 536
Glutathione peroxidase (GPx) activity measurements reveal that green tea polyphenols helped maintain redox balance in ischemic brain tissue.
chartFigure 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.
chartFigure 538
NF-kappaB expression levels in brain tissue sections indicate reduced inflammatory signaling in the green tea extract treatment group following cerebral ischemia.
chartFigure 539
Quantification of inflammatory cell infiltration shows fewer activated microglia in EGCG-treated rats compared to the ischemic control group.
chartFigure 540
COX-2 expression measured by Western blot analysis was attenuated in GTex-treated ischemic rats, consistent with reduced neuroinflammation.
chartFigure 541
Coronal brain section from a sham-operated rat shows intact neuronal architecture in the hippocampal CA1 region with no signs of ischemic damage.
micrographFigure 542
Histological section of hippocampal tissue from an ischemic control rat reveals extensive neuronal cell death and pyknotic nuclei in the CA1 subfield.
micrographFigure 543
Brain tissue section from an EGCG-treated rat shows preserved hippocampal neuronal morphology with markedly less ischemic damage compared to untreated controls.
micrographFigure 544
Nissl-stained hippocampal sections demonstrate significantly more surviving neurons in the CA1 region of GTex-treated rats following cerebral ischemia.
micrographFigure 545
Higher magnification view of the hippocampal CA1 region reveals intact pyramidal cell layers in green tea extract-treated ischemic rats.
micrographFigure 546
Representative brain section showing the extent of infarct area, with TTC staining revealing reduced infarct volume in the EGCG pretreatment group.
micrographFigure 547
Cortical tissue section from an ischemic rat displays marked neuronal degeneration, characterized by shrunken cell bodies and darkly stained nuclei.
micrographFigure 548
Immunohistochemical staining for GFAP in the peri-infarct region shows reduced astrocyte activation in GTex-treated rats.
micrographFigure 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.
photographFigure 550
Densitometric analysis of Western blot data shows significantly increased Bcl-2/Bax ratio in green tea extract-treated rats, indicating anti-apoptotic signaling.
chartFigure 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.
photographFigure 552
Western blot analysis of NF-kappaB p65 subunit translocation reveals attenuated nuclear accumulation in GTex-pretreated ischemic brain tissue.
photographFigure 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.
chartFigure 554
Representative TTC-stained coronal brain slices from each experimental group illustrate the dose-dependent neuroprotective effect of EGCG on infarct size.
photographFigure 555
Bar graph comparing mean infarct volumes shows that both GTex and EGCG treatments resulted in significantly smaller ischemic lesions than vehicle control.
chartFigure 556
TUNEL staining of hippocampal sections reveals fewer apoptotic neurons in the EGCG-treated group, suggesting neuroprotection against ischemia-induced cell death.
micrographFigure 557
Quantification of TUNEL-positive cells in the peri-infarct cortex indicates that green tea extract pretreatment significantly reduced neuronal apoptosis.
chartFigure 558
Caspase-3 immunoreactivity in the ischemic penumbra was markedly reduced in GTex-treated rats, consistent with attenuated apoptotic signaling.
micrographFigure 559
Neurological deficit scores assessed at 24 hours post-ischemia were significantly lower in the EGCG and GTex groups, indicating better functional outcomes.
chartFigure 560
Composite neurological function scores across treatment groups demonstrate dose-dependent improvement with EGCG administration before ischemic injury.
chartFigure 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.
chartFigure 562
Experimental timeline illustrating the sequence of green tea extract administration, middle cerebral artery ligation, and behavioral testing in the Morris water maze.
diagramFigure 563
Schematic diagram of the study design showing group allocation, treatment protocol, and outcome measurement timepoints for the cerebral ischemia model.
flowchartFigure 564
Regional cerebral blood flow measurements indicate that EGCG pretreatment did not significantly alter perfusion patterns during middle cerebral artery occlusion.
chartFigure 565
Immunofluorescence staining of brain tissue shows reduced microglial activation (Iba-1 positive cells) in the peri-infarct region of GTex-treated rats.
micrographFigure 566
Quantitative analysis of surviving neurons in the hippocampal CA1 region reveals a significantly higher neuronal density in EGCG-treated versus ischemic control animals.
chartFigure 567
Dose-response relationship between EGCG concentration and MDA reduction suggests optimal neuroprotection at the tested pretreatment dose.
chartFigure 568
Representative photomicrographs of Fluoro-Jade B staining demonstrate fewer degenerating neurons in the cortex of green tea extract-treated ischemic rats.
micrographFigure 569
Brain edema quantification based on wet-dry weight ratios indicates reduced cerebral swelling in the EGCG pretreatment group following ischemia.
chartFigure 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.
chartFigure 571
Cytochrome c release from mitochondria was attenuated in the EGCG group, as shown by Western blot analysis of cytosolic and mitochondrial fractions.
photographFigure 572
Heat map of gene expression changes in the ischemic penumbra reveals upregulation of antioxidant response elements in GTex-pretreated rats.
chartFigure 573
Comparative analysis of platform crossings during the probe trial indicates significantly better spatial memory recall in both EGCG and PTX groups.
chartFigure 574
Immunohistochemical detection of 8-OHdG (oxidative DNA damage marker) shows reduced nuclear staining intensity in hippocampal neurons of EGCG-treated rats.
micrographFigure 575
Total antioxidant capacity (TAC) measurements in brain tissue demonstrate preservation of redox homeostasis with green tea extract pretreatment.
chartFigure 576
Behavioral assessment data from ischemic rats treated with green tea extract (GTex) or EGCG, evaluating learning and memory performance after cerebral ischemia induction.
chartFigure 577
Quantitative analysis of memory function in rats following ischemic stroke, comparing green tea extract and EGCG treatment groups against vehicle controls.
chartFigure 578
Morris water maze performance metrics for ischemic rats, illustrating spatial learning and memory outcomes across green tea polyphenol treatment conditions.
chartFigure 579
Oxidative stress biomarker levels in brain tissue of ischemic rats, measuring the antioxidant effects of green tea extract and EGCG supplementation.
chartFigure 580
Measurement of reactive oxygen species and lipid peroxidation markers in cerebral tissue, comparing EGCG-treated and untreated ischemic rat groups.
chartFigure 581
Antioxidant enzyme activity levels in brain homogenates from ischemic rats receiving green tea extract or EGCG treatment.
chartFigure 582
Neuroinflammatory marker expression in ischemic brain tissue, assessing the anti-inflammatory properties of EGCG and green tea extract.
chartFigure 583
Pro-inflammatory cytokine levels measured in brain tissue following cerebral ischemia, with and without green tea polyphenol intervention.
chartFigure 584
Inflammatory pathway activation analysis in ischemic rat brain, demonstrating modulation by green tea extract components.
chartFigure 585
Histological examination of brain tissue from ischemic rats, comparing neuronal damage between green tea extract-treated and control groups.
micrographFigure 586
Brain tissue section showing the extent of ischemic damage and neuronal preservation in rats treated with EGCG.
micrographFigure 587
Microscopic analysis of cerebral cortex tissue, illustrating the neuroprotective effects of green tea polyphenols against ischemic injury.
micrographFigure 588
Western blot or protein expression analysis from ischemic rat brain tissue, evaluating molecular targets of green tea extract and EGCG.
chartFigure 589
Signaling pathway protein quantification in brain tissue, showing how EGCG modulates oxidative stress and inflammatory cascades after ischemia.
chartFigure 590
Gene or protein expression data from cerebral tissue of ischemic rats, comparing the molecular effects of green tea extract treatment.
chartFigure 591
Experimental data from the ischemic stroke rat model examining the dose-dependent neuroprotective effects of green tea polyphenol EGCG.
chartFigure 592
Quantitative outcome measures from rats with induced cerebral ischemia, comparing green tea extract efficacy in reducing brain damage.
chartFigure 593
Biochemical analysis of brain tissue parameters in ischemic rats, supporting the therapeutic potential of green tea-derived EGCG.
chartFigure 594
Assessment of neurological deficit scores in ischemic rats across treatment groups receiving green tea extract or purified EGCG.
chartFigure 595
Comparative analysis of cerebral infarct volume or edema in rats treated with green tea extract versus vehicle following ischemic injury.
chartFigure 596
Behavioral assessment data from ischemic rats treated with green tea extract (GTex) or EGCG, evaluating learning and memory performance after cerebral ischemia induction.
chartFigure 597
Quantitative analysis of memory function in rats following ischemic stroke, comparing green tea extract and EGCG treatment groups against vehicle controls.
chartFigure 598
Morris water maze performance metrics for ischemic rats, illustrating spatial learning and memory outcomes across green tea polyphenol treatment conditions.
chartFigure 599
Oxidative stress biomarker levels in brain tissue of ischemic rats, measuring the antioxidant effects of green tea extract and EGCG supplementation.
chartFigure 600
Measurement of reactive oxygen species and lipid peroxidation markers in cerebral tissue, comparing EGCG-treated and untreated ischemic rat groups.
chartFigure 601
Antioxidant enzyme activity levels in brain homogenates from ischemic rats receiving green tea extract or EGCG treatment.
chartFigure 602
Neuroinflammatory marker expression in ischemic brain tissue, assessing the anti-inflammatory properties of EGCG and green tea extract.
chartFigure 603
Pro-inflammatory cytokine levels measured in brain tissue following cerebral ischemia, with and without green tea polyphenol intervention.
chartFigure 604
Inflammatory pathway activation analysis in ischemic rat brain, demonstrating modulation by green tea extract components.
chartFigure 605
Histological examination of brain tissue from ischemic rats, comparing neuronal damage between green tea extract-treated and control groups.
micrographFigure 606
Brain tissue section showing the extent of ischemic damage and neuronal preservation in rats treated with EGCG.
micrographFigure 607
Microscopic analysis of cerebral cortex tissue, illustrating the neuroprotective effects of green tea polyphenols against ischemic injury.
micrographFigure 608
Western blot or protein expression analysis from ischemic rat brain tissue, evaluating molecular targets of green tea extract and EGCG.
chartFigure 609
Signaling pathway protein quantification in brain tissue, showing how EGCG modulates oxidative stress and inflammatory cascades after ischemia.
chartFigure 610
Gene or protein expression data from cerebral tissue of ischemic rats, comparing the molecular effects of green tea extract treatment.
chartFigure 611
Experimental data from the ischemic stroke rat model examining the dose-dependent neuroprotective effects of green tea polyphenol EGCG.
chartFigure 612
Quantitative outcome measures from rats with induced cerebral ischemia, comparing green tea extract efficacy in reducing brain damage.
chartFigure 613
Biochemical analysis of brain tissue parameters in ischemic rats, supporting the therapeutic potential of green tea-derived EGCG.
chartFigure 614
Assessment of neurological deficit scores in ischemic rats across treatment groups receiving green tea extract or purified EGCG.
chartFigure 615
Comparative analysis of cerebral infarct volume or edema in rats treated with green tea extract versus vehicle following ischemic injury.
chartFigure 616
Behavioral assessment data from ischemic rats treated with green tea extract (GTex) or EGCG, evaluating learning and memory performance after cerebral ischemia induction.
chartFigure 617
Quantitative analysis of memory function in rats following ischemic stroke, comparing green tea extract and EGCG treatment groups against vehicle controls.
chartFigure 618
Morris water maze performance metrics for ischemic rats, illustrating spatial learning and memory outcomes across green tea polyphenol treatment conditions.
chartFigure 619
Oxidative stress biomarker levels in brain tissue of ischemic rats, measuring the antioxidant effects of green tea extract and EGCG supplementation.
chartFigure 620
Measurement of reactive oxygen species and lipid peroxidation markers in cerebral tissue, comparing EGCG-treated and untreated ischemic rat groups.
chartFigure 621
Antioxidant enzyme activity levels in brain homogenates from ischemic rats receiving green tea extract or EGCG treatment.
chartFigure 622
Neuroinflammatory marker expression in ischemic brain tissue, assessing the anti-inflammatory properties of EGCG and green tea extract.
chartFigure 623
Pro-inflammatory cytokine levels measured in brain tissue following cerebral ischemia, with and without green tea polyphenol intervention.
chartFigure 624
Inflammatory pathway activation analysis in ischemic rat brain, demonstrating modulation by green tea extract components.
chartFigure 625
Histological examination of brain tissue from ischemic rats, comparing neuronal damage between green tea extract-treated and control groups.
micrographFigure 626
Brain tissue section showing the extent of ischemic damage and neuronal preservation in rats treated with EGCG.
micrographFigure 627
Microscopic analysis of cerebral cortex tissue, illustrating the neuroprotective effects of green tea polyphenols against ischemic injury.
micrographFigure 628
Western blot or protein expression analysis from ischemic rat brain tissue, evaluating molecular targets of green tea extract and EGCG.
chartFigure 629
Signaling pathway protein quantification in brain tissue, showing how EGCG modulates oxidative stress and inflammatory cascades after ischemia.
chartFigure 630
Gene or protein expression data from cerebral tissue of ischemic rats, comparing the molecular effects of green tea extract treatment.
chartFigure 631
Experimental data from the ischemic stroke rat model examining the dose-dependent neuroprotective effects of green tea polyphenol EGCG.
chartFigure 632
Quantitative outcome measures from rats with induced cerebral ischemia, comparing green tea extract efficacy in reducing brain damage.
chartFigure 633
Biochemical analysis of brain tissue parameters in ischemic rats, supporting the therapeutic potential of green tea-derived EGCG.
chartFigure 634
Assessment of neurological deficit scores in ischemic rats across treatment groups receiving green tea extract or purified EGCG.
chartFigure 635
Comparative analysis of cerebral infarct volume or edema in rats treated with green tea extract versus vehicle following ischemic injury.
chartFigure 636
Behavioral assessment data from ischemic rats treated with green tea extract (GTex) or EGCG, evaluating learning and memory performance after cerebral ischemia induction.
chartFigure 637
Quantitative analysis of memory function in rats following ischemic stroke, comparing green tea extract and EGCG treatment groups against vehicle controls.
chartFigure 638
Morris water maze performance metrics for ischemic rats, illustrating spatial learning and memory outcomes across green tea polyphenol treatment conditions.
chartFigure 639
Oxidative stress biomarker levels in brain tissue of ischemic rats, measuring the antioxidant effects of green tea extract and EGCG supplementation.
chartFigure 640
Measurement of reactive oxygen species and lipid peroxidation markers in cerebral tissue, comparing EGCG-treated and untreated ischemic rat groups.
chartFigure 641
Antioxidant enzyme activity levels in brain homogenates from ischemic rats receiving green tea extract or EGCG treatment.
chartFigure 642
Neuroinflammatory marker expression in ischemic brain tissue, assessing the anti-inflammatory properties of EGCG and green tea extract.
chartFigure 643
Pro-inflammatory cytokine levels measured in brain tissue following cerebral ischemia, with and without green tea polyphenol intervention.
chartFigure 644
Inflammatory pathway activation analysis in ischemic rat brain, demonstrating modulation by green tea extract components.
chartFigure 645
Histological examination of brain tissue from ischemic rats, comparing neuronal damage between green tea extract-treated and control groups.
micrographFigure 646
Brain tissue section showing the extent of ischemic damage and neuronal preservation in rats treated with EGCG.
micrographFigure 647
Microscopic analysis of cerebral cortex tissue, illustrating the neuroprotective effects of green tea polyphenols against ischemic injury.
micrographFigure 648
Western blot or protein expression analysis from ischemic rat brain tissue, evaluating molecular targets of green tea extract and EGCG.
chartFigure 649
Signaling pathway protein quantification in brain tissue, showing how EGCG modulates oxidative stress and inflammatory cascades after ischemia.
chartFigure 650
Gene or protein expression data from cerebral tissue of ischemic rats, comparing the molecular effects of green tea extract treatment.
chartFigure 651
Experimental data from the ischemic stroke rat model examining the dose-dependent neuroprotective effects of green tea polyphenol EGCG.
chartFigure 652
Quantitative outcome measures from rats with induced cerebral ischemia, comparing green tea extract efficacy in reducing brain damage.
chartFigure 653
Biochemical analysis of brain tissue parameters in ischemic rats, supporting the therapeutic potential of green tea-derived EGCG.
chartFigure 654
Assessment of neurological deficit scores in ischemic rats across treatment groups receiving green tea extract or purified EGCG.
chartFigure 655
Comparative analysis of cerebral infarct volume or edema in rats treated with green tea extract versus vehicle following ischemic injury.
chartFigure 656
Behavioral assessment data from ischemic rats treated with green tea extract (GTex) or EGCG, evaluating learning and memory performance after cerebral ischemia induction.
chartFigure 657
Quantitative analysis of memory function in rats following ischemic stroke, comparing green tea extract and EGCG treatment groups against vehicle controls.
chartFigure 658
Morris water maze performance metrics for ischemic rats, illustrating spatial learning and memory outcomes across green tea polyphenol treatment conditions.
chartFigure 659
Oxidative stress biomarker levels in brain tissue of ischemic rats, measuring the antioxidant effects of green tea extract and EGCG supplementation.
chartFigure 660
Measurement of reactive oxygen species and lipid peroxidation markers in cerebral tissue, comparing EGCG-treated and untreated ischemic rat groups.
chartFigure 661
Antioxidant enzyme activity levels in brain homogenates from ischemic rats receiving green tea extract or EGCG treatment.
chartFigure 662
Neuroinflammatory marker expression in ischemic brain tissue, assessing the anti-inflammatory properties of EGCG and green tea extract.
chartFigure 663
Pro-inflammatory cytokine levels measured in brain tissue following cerebral ischemia, with and without green tea polyphenol intervention.
chartFigure 664
Inflammatory pathway activation analysis in ischemic rat brain, demonstrating modulation by green tea extract components.
chartFigure 665
Histological examination of brain tissue from ischemic rats, comparing neuronal damage between green tea extract-treated and control groups.
micrographFigure 666
Brain tissue section showing the extent of ischemic damage and neuronal preservation in rats treated with EGCG.
micrographFigure 667
Microscopic analysis of cerebral cortex tissue, illustrating the neuroprotective effects of green tea polyphenols against ischemic injury.
micrographFigure 668
Western blot or protein expression analysis from ischemic rat brain tissue, evaluating molecular targets of green tea extract and EGCG.
chartFigure 669
Signaling pathway protein quantification in brain tissue, showing how EGCG modulates oxidative stress and inflammatory cascades after ischemia.
chartFigure 670
Gene or protein expression data from cerebral tissue of ischemic rats, comparing the molecular effects of green tea extract treatment.
chartFigure 671
Experimental data from the ischemic stroke rat model examining the dose-dependent neuroprotective effects of green tea polyphenol EGCG.
chartFigure 672
Quantitative outcome measures from rats with induced cerebral ischemia, comparing green tea extract efficacy in reducing brain damage.
chartFigure 673
Biochemical analysis of brain tissue parameters in ischemic rats, supporting the therapeutic potential of green tea-derived EGCG.
chartFigure 674
Assessment of neurological deficit scores in ischemic rats across treatment groups receiving green tea extract or purified EGCG.
chartFigure 675
Comparative analysis of cerebral infarct volume or edema in rats treated with green tea extract versus vehicle following ischemic injury.
chartFigure 676
Behavioral assessment data from ischemic rats treated with green tea extract (GTex) or EGCG, evaluating learning and memory performance after cerebral ischemia induction.
chartFigure 677
Quantitative analysis of memory function in rats following ischemic stroke, comparing green tea extract and EGCG treatment groups against vehicle controls.
chartFigure 678
Morris water maze performance metrics for ischemic rats, illustrating spatial learning and memory outcomes across green tea polyphenol treatment conditions.
chartFigure 679
Oxidative stress biomarker levels in brain tissue of ischemic rats, measuring the antioxidant effects of green tea extract and EGCG supplementation.
chartFigure 680
Measurement of reactive oxygen species and lipid peroxidation markers in cerebral tissue, comparing EGCG-treated and untreated ischemic rat groups.
chartFigure 681
Antioxidant enzyme activity levels in brain homogenates from ischemic rats receiving green tea extract or EGCG treatment.
chartFigure 682
Neuroinflammatory marker expression in ischemic brain tissue, assessing the anti-inflammatory properties of EGCG and green tea extract.
chartFigure 683
Pro-inflammatory cytokine levels measured in brain tissue following cerebral ischemia, with and without green tea polyphenol intervention.
chartFigure 684
Inflammatory pathway activation analysis in ischemic rat brain, demonstrating modulation by green tea extract components.
chartFigure 685
Histological examination of brain tissue from ischemic rats, comparing neuronal damage between green tea extract-treated and control groups.
micrographFigure 686
Brain tissue section showing the extent of ischemic damage and neuronal preservation in rats treated with EGCG.
micrographFigure 687
Microscopic analysis of cerebral cortex tissue, illustrating the neuroprotective effects of green tea polyphenols against ischemic injury.
micrographTables
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