Green Tea Polyphenols Modulated Cerebral SOD Expression and Endoplasmic Reticulum Stress in Cardiac Arrest/Cardiopulmonary Resuscitation Rats

Hu, Wanxiang; Wang, Huihui; Shu, Quan; Chen, Menghua; Xie, Lu

doi:https://doi.org/10.1155/2020/5080832

BioMed Research International

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Abstract Introduction Materials and Methods Results Discussion Conclusion Data Availability Conflicts of Interest Authors’ Contributions Acknowledgments References Copyright Related Articles

Research Article | Open Access

Volume 2020 | Article ID 5080832 | https://doi.org/10.1155/2020/5080832

Green Tea Polyphenols Modulated Cerebral SOD Expression and Endoplasmic Reticulum Stress in Cardiac Arrest/Cardiopulmonary Resuscitation Rats

Wanxiang Hu,¹Huihui Wang,²Quan Shu,^1,3Menghua Chen,⁴and Lu Xie¹

Academic Editor: Gessica Sala

Received05 Oct 2019

Revised04 Jan 2020

Accepted29 Jan 2020

Published25 Feb 2020

Abstract

Background. Reducing cerebral ischemia-reperfusion injury is crucial for improving survival and neurologic outcomes after cardiac arrest/cardiopulmonary resuscitation (CA/CPR). The purpose of this study is to investigate the neuroprotective effects of green tea polyphenols (GTPs) concern with the modulation of endogenous antioxidation and endoplasmic reticulum stress. Methods. After subjecting to CA/CPR, rats were randomized into the saline group (NS, n = 40) and the GTPs group (GTPs, n = 40). Each group was blindly located into four subgroups according to four time points (12 h, 24 h, 48 h, and 72 h). Other rats without experiencing CA/CPR severed as the Sham group (Sham, n = 10). Brain tissue samples were harvested at relative time points. The expressions of superoxide dismutase 1 (SOD1), superoxide dismutase 2 (SOD2), caspase-3, and C/EBP-homologous protein (CHOP) were detected by immunofluorescence, dead neurons were assayed by TUNEL staining, and the expressions of caspase-12 and glucose-regulated proteins 78 kDa (GRP78) were evaluated by western blotting, respectively. Results. Comparing with that in NS group, GTPs increased the expression of SOD1 and SOD2 at 12 h, 24 h, 48 h, 72 h, and the expression of GRP78 at 24 h and 48 h () butdecreased caspase-12, CHOP, caspase-3 level, and apoptotic number of neurons () after restoration of spontaneous circulation (ROSC). Conclusion. GTPs exert neuroprotective effects via mechanisms that may be related to the enhancement of endogenous antioxidant capacity and inhibition of endoplasmic reticulum stress in CA/CPR rat models.

1. Introduction

Cardiac arrest is a common and intractable condition frequently encountered in hospitals and outside of hospitals [1]. Although more rapid and effective resuscitation is thought to alleviate the outcomes after cardio arrest (CA), the mortality and morbidity after CA/CPR remain high; that is due to ischemia-reperfusion injury occurring in organs in the body, especially in the brain [2–4]. Cerebral ischemia-reperfusion injury (CIRI) is a very complicated cascade of reactions involving multiple mechanisms, such as oxidative stress, calcium overload, mitochondrial dysfunction, inflammatory reaction, and neuronal apoptosis [5–7]. Current researches have indicated that oxidative stress plays a vital role in the pathogenesis of CIRI with a characteristic of the imbalance of oxidative and antioxidant defense system [8, 9]. When the redox balance is disturbed, accumulated free radicals trigger cell membrane lipid peroxidation and can also initiate neuronal apoptotic cascades through mitochondria, endoplasmic reticulum, or death receptors, resulting in neural dysfunction and cell death [10–12].

In recent years, endoplasmic reticulum (ER) stress has attracted widespread attention as a new mechanism of apoptosis, which is related to the pathological process of cerebral ischemia. After the ER stress, initiating the unfolded protein response (UPR) will help to restore the activity of endoplasmic reticulum and participate in the coordination of nerve cell apoptosis so as to improve neurological disorders [13, 14]. Furthermore, one study reported that dexmedetomidine can partially inhibit ER stress-induced apoptosis through modulating ER stress-related protein (for example, inducing GRP78 expression but inhibiting CHOP, caspase-3, and phosphorylated-JNK expression), thereby attenuating brain damage after ischemia-reperfusion [15]. Similarly, the inhibition of the expression of ER stress apoptotic proteins such as caspase-12, CHOP, Bax/Bcl-2, caspase-9, and caspase-3 may exert protective effect via PI3K/AKT signaling pathway on ER stress-induced neuronal apoptosis in in vivo or in vitro experiments [16]. The above evidence interests us to find out a probability against CIRI concerning ER stress modulation.

GTP is a phenolic hydroxyl compound extracted from tea leaves and has strong antioxidant capacity [17–20]. Studies have shown that the active constituents of green tea polyphenols, the phenolic hydroxyl group of epigallocatechin-3-gallate (EGCG), can bind to hydrogen radicals, lipid peroxides and free iron to block the oxidative chain reaction, inhibiting apoptosis induced by focal cerebral ischemia and hypoxia reperfusion [9]. It has been reported that EGCF can attenuate ER stress-induced apoptosis of tubular epithelial cells in kidney, accompanied by decreased ER stress-related markers [21]. Our previous studies showed that GTPs can reduce the content of reactive oxygen species and malondialdehyde (MDA) in brain tissue of CPR rats, enhance SOD activity, significantly improve the score of neurological deficit, and prolong the survival time after resuscitation [22]. In addition to enhancing the activity of SOD, GTPs can increase the expression of SOD and inhibit neuronal apoptosis through modulating ER stress remains elusive. Therefore, in this study, we used the typical cardiac arrest (CA)/CPR model to confirm antioxidant effects of GTPs treatment through detecting SOD1, SOD2 level and to reveal the effect of GTPs on ER stress and apoptosis by detecting the apoptosis indices as well as ER stress-associated marker proteins such as GRP78, caspase-12, and CHOP.

2. Materials and Methods

2.1. Experimental Animals and Protocol

The experimental rats were treated according to the Guidelines for the Care and Use of Laboratory Animals and the study protocol was approved by the animal ethics committee of Guangxi Medical University. Ninety healthy male Sprague-Dawley rats, aged 6 to 8 weeks, were purchased from the Animal Experimental Center of Guangxi Medical University (Nanning, Guangxi). All rats were fed with normal rat chow and water ad libitum and kept on a 12 h light and dark cycles. Rats were allowed to acclimatize for 1 wk and then randomly divided into 3 groups: 40 rats in each group of the NS group and the GTPs group, and 10 rats in the Sham group. The present protocol referenced to our previous study in grouping and GTPs doses as follows [22]. Rats in the NS group and the GTPs group were randomly divided into four subgroups at four time points: 12 h, 24 h, 48 h and 72 h. In addition to the Sham group, the other groups of rats were induced into CA by esophageal electrical stimulation and then CPR. Rats were administered immediately after resuscitation via femoral vein in double-blind by 0.9% saline (1 ml/kg), GTPs (10 mg/kg), respectively. At various time points, experimental rats were killed by intraperitoneal injection of excess sodium pentobarbital and brain tissues were harvested according to different experimental requirements, in which half of them were fixed in 4% buffered paraformaldehyde and made into paraffin sections for immunofluorescence staining and TUNEL staining. Another five rats’ cortices in each group were collected and homogenized for Western blotting. The Sham group underwent surgical operations, such as the femoral artery, vein and tracheal intubation, and monitoring of ECG and blood pressure, without inducing CPR.

2.2. CA/Cerebral Ischemia-Reperfusion Modeling

The CA/cerebral ischemia-reperfusion model of rats was established as previously described [23]. Briefly, rats were anesthetized with an intraperitoneal injection of 2% sodium pentobarbital (3 ml/kg) and fixed in the supine position. Tracheal intubation and surgical incision in the left inguinal region were performed separately, and cardiac rhythm was monitored using a standard II lead electrocardiogram. Then, two 20-gauge catheters filling with sodium heparin saline (5 IU/ml) were inserted into the left femoral artery or vein for monitoring hemodynamic and delivering drugs, respectively. The pressure sensor was connected to a 4-channel physiological recorder (BL-420E New Century software; Chengdu Tai Meng Technology&Market Co., Ltd., China). After all physiological indicators were observed for several minutes, the rats were induced CA by a pacing electrode (alternating current, 12V) placed in the esophagus. Cardiac arrest was defined as a loss of aortic pulsation or aortic pulse pressure less than 10 mmHg, and mean arterial pressure (MAP) less than 20 mmHg together with ventricular fibrillation, pulseless electrical activity, or cardiac arrest. Seven minutes after CA, CPR was initiated with a volume-controlled small animal ventilator (DH-150; Department of Medical Instruments, Zhejiang University, China), chest compression, and adrenaline (0.02 mg/kg, IV). The manual chest compression speed is 180 beats per minute following a metronome. Restoration of spontaneous circulation (ROSC) was defined as an unassisted pulse with a mean arterial pressure value not lower than 50 mmHg for maintaining 1 minute or longer.

2.3. Immunofluorescence Staining of SOD1, SOD2, CHOP, and Caspase-3

The prepared paraffin slices were roasted, dewaxed and citrated buffer high pressure repaired, then they were naturally cooled, removed endogenous peroxidase by adding 3% hydrogen peroxide, and incubated with different primary antibody (SOD1, ab13498, 1 : 200, Abcam, USA; SOD2, ab13534, 1 : 200, Abcam, USA; CHOP, #2895, 1 : 200, CST, USA; caspase-3, ab32351, Abcam, USA; 1 : 200) in a wet box at 4°C overnight. The negative control group was replaced with PBS instead of the primary antibody. Washing in PBS three times for 5 minutes each time, secondary antibody (ALexar Fluor647, ab150079, 1 : 300, Abcam, USA) was incubated in a cassette for 1 h at 37°C, and then washed with PBS again. At last, Nuclear was counterstained with DAPI for 2 min and rinsed 3 times by PBS. The appropriate amount of antifluorescence-attenuating sealer (Solarbio, Shanghai, China) was used for sealing. Five different fields of fluorescence were observed under a conjugated double-focus microscope (Nikon, Japan). The fluorescence density was analyzed by Image-Pro Plus 6.0 software.

2.4. TUNEL and DAPI Staining

The apoptotic neurons were detected by TUNEL staining using a commercial kit (116848817910, Roche, USA) according to the manufacturers' instructions. Paraffin sections of 5 μm thickness from tissues were deparaffinized and rehydrated conventionally, then rinsed twice in PBS for 5 min and incubated with Proteinase K working solution for 30 min at room temperature. After washing in PBS again, the labeling reaction was performed using 50 μL TUNEL reagent for each sample, except negative control in which reagent without enzyme, incubated for 1 h at 37°C. Following washing, the sections were treated with the terminal deoxynucleotidyl transferase (TdT) reaction. Finally, the paraffin sections were counterstained with DAPI for 2 min. All images were examined and captured by the confocal microscope (Nikon AI-Japan). TUNEL-positive apoptotic cells exhibiting green fluorescent granules were counted in five randomly selected microscopic fields at a microscopic magnification of 200x.

2.5. Western Blotting

The expression of ES stress-related proteins was detected by Western blot. Protein concentration was assayed by BCA reagents. 80 μg protein samples from each sample were electrophoresed in 10% gels. Then the separated proteins were transferred onto a polyvinylidene difluoride (PVDF) membrane (Bio-Rad, Hercules, CA, United States). 5% skimmed milk was used to block the nonspecific binding proteins for 40 min at room temperature, and then the membranes were incubated overnight at 4°C with the following primary antibodies: GRP78 (1 : 1000, Cell Signaling Technologies, United States), caspase-12 (1 : 1000, Abcam, United States), and tubulin (1 : 1000 Cell Signaling Technologies, United States). Subsequently, the membranes were washed thrice with TBST and the membranes were incubated with secondary antibodies rabbit polyclonal antibody (1 : 1000, Abcam, United States) for 60 min. Finally, An enhanced Chemiluminescence was used to visualize the bands, which were captured on X-ray film. The relative intensity of the bands was analyzed by Image-Pro Plus 6.0 software, and the band densities of target proteins were normalized to that of tubulin.

2.6. Statistical Analysis

The obtained data were analyzed using SPSS17.0 software. All values were presented as the means ± standard deviation (SD). Significant differences between groups are shown by one-way analysis of variance and the results are analyzed by software with considered statistically significant.

3. Results

3.1. GTPs Enhanced Fluorescence Density of SOD1 and SOD2

The fluorescent staining of SOD1 and SOD2 was, respectively, shown in Figure 1 and Figure 2. We choose the representative picture at a special time point to show the most significant change (see Figure 1 (right) and Figure 2 (right)). As Figure 1 (left) and Figure 2 (left) showed, the fluorescence density of SOD1 in the NS group was significantly decreased at each time point () and SOD2 decreased at 12 h, 24 h, and 48 h compared with the Sham group. Whereas in the GTPs group, both SOD1 and SOD2 were higher than the NS group at all time points. The above results show that GTPs exert an antioxidative role through enhancing the expression of SOD1 and SOD2 in the process of CIRI after CA/CPR. Furthermore, SOD1 and SOD2 may exert their own effects at different times, respectively.

3.2. GTPs Reduced Neuronal Apoptosis

The neuronal apoptosis was detected by TUNEL staining. DNA damage was detected and morphology of normal nuclei was detected by DAPI staining. The apoptosis rate is expressed as the ratio of TUNEL-stained cells to the number of DAPI staining cells. Comparing apoptosis rates at various time points, we found that only at 72 h after ROSC, the expression of TUNEL-positive cells in the NS group and the GTPs group was significantly higher than that in the Sham group, and the number of TUNEL-positive cells was significantly lower than that in the NS group (Figure 3, ) after GTP_S treatment. At least, GTP_S can effectively reduce neuronal apoptosis caused by cerebral ischemia-reperfusion injury in CA/CPR rats model.

(a)

(b)

3.3. GTPs Reduced Caspase-3 Expression

Caspase-3 was a proapoptotic protein in the classic apoptotic pathway. We chose it to measure the apoptosis in this experiment. Figure 4 showed that the expression of caspase-3 in the GTPs group and NS group was higher than that in the Sham group at 72 h, but the expression level of caspase-3 in the GTPs group was lower than that in the NS group (). The experimental data at 12, 24, and 48 h time points showed no significant difference by statistical analysis. These results suggest that GTPs effectively alleviated the expression of caspase-3, which indicated the antiapoptosis role of GTPs during the pathological process of CIRI.

(a)

(b)

3.4. Effect of GTPs on the Expression of Caspase-12 and GPR78

To confirm that the ER stress participated in the neuroprotective role of GTP_S against CIRI, caspase-12 and GPR78 protein expression were detected in the brain tissues with or without GTPs treatment. As shown in Figure 5(a), we found no significant difference in the expression of caspase-12 between the 12th and 24th hour. The expression of caspase-12 protein in the NS group was higher than that in the Sham group at 48 h and 72 h (), while the expression of caspase-12 protein in the GTPs group was lower than that in the NS group and Sham group ().

(a)

(b)

As Figure 5(b) showed, the expression of GRP78 in the NS group began to increase at 12 h after CPR and reached the peak at 24 h (). The most significant increase of GRP78 expression occurred in the NS group and GTPs group at 24 h and 48 h (), and compared with the NS group, the GTPs group also increased significantly (). There was no statistical difference between groups at 72 h. So, GPR78 exerts the role in ER stress mainly at 24–48 hours after resuscitation.

Our data indicated that GRP78, as a vital regulator of ER stress, significantly changed after GTPs treatment and the expressions of caspase-12 and GPR78 were different at various periods.

3.5. CHOP Expression in the Cerebral Cortex

Figure 6 showed that immunofluorescence staining expression of CHOP in the brain of the NS group (NS48Hd, e and NS72Hj, k) and GTPs group (GTPs48Hg, h and GTPs72Hm, n) was significantly increased compared with the Sham group () and reached a peak at 72 h after CPR. GTPs decreased significantly the expression of CHOP compared with the NS group (), but in the early stage, for example, the expression of CHOP at 12 h or 24 h was not statistically significant.

(a)

(b)

Figure 6

GTPs attenuated CHOP levels induced in CA/CPR rats. (a) Cerebral cortex fluorescence staining in rats at 48 hours and 72 hours. Images were captured by objective lens ×200. Red (a, d, g, j, m) indicated CHOP positive cell expression in the cerebral cortex. Blue (b, e, h, k, n) stained by DAPI (4′, 6-diamidino-2-phenylindole) represented all cells. (c, f, i, l, o) showed merging pictures. (b) The relative expression of CHOP protein. Data are shown as mean ± standard deviation, n = 5. compared with the Sham group; compared with the NS group.

The experimental results of CHOP were consistent with the expression of caspase-12. After early self-repair and self-balance, if it cannot rescue the injury caused by CIR, in the later stage after CIRI, excessive endoplasmic reticulum stress may eventually promote brain cells to undergo apoptosis and cause irreversible damage. Therefore, early treatment intervention cannot be overemphasized.

4. Discussion

The present study expanded our previous research and investigated the potential neuroprotective mechanisms of GTPs concerning endogenous antioxidation and ER stress. The imbalance of oxidation and antioxidation is a direct reason for deficits of neurological functions and high mortality during CIRI [24, 25]. GTPs possess higher antioxidant activity than vitamin E and vitamin C [26, 27]. Our team and other researchers have reported that GTPs can improve CIRI outcomes in local cerebral ischemia-reperfusion and CPR models, relating to its effects of increasing SOD activity and decreasing ROS, MDA production [9, 28]. At present, this study further confirmed that GTPs can produce endogenous antioxidant effects by promoting the expression of SOD1 (CuZn-SOD, mainly located in the cytoplasm) and SOD2 (Mn-SOD, mainly located in mitochondria) in the brain.

Similarly, our previous research has demonstrated that GTPs improved the morphology of brain cells and reduced cell death after CPR by H&E staining. In order to observe the antiapoptotic effect of GTPs, we used typical TUNEL staining here, and the results are consistent with previous experimental results. Interestingly, we also found that GTPs modulating excessive oxidative stress contributed to an antiapoptotic effect. After GTPs treatment, we observed the ratio of apoptosis cells and caspase-3 expression both decreased while the expression of SOD1 and SOD2 both increased, indicating that there is a potential relationship between antioxidation and antiapoptotic function of GTPs. More SOD expression by GTPs means less apoptosis in the brain under certain circumstances.

To elucidate the additional mechanism of GTPs on antiapoptosis apart from antioxidation, we investigated the possibility of GTPs on the ER pathway concerning apoptosis in cerebral injury post-CA/PCR, since it is known that ER stress relates to pathophysiology of ischemia-reperfusion [29, 30]. As the important site for protein folding and synthesis, ER is very sensitive to the homeostasis unbalance of the body [31]. In ischemia and hypoxia, oxidative stress disturbs the ER homeostasis leading to the accumulation of misfolded or unfolded protein, triggering unfolded protein response (UPR) [32]. The protein chaperone GRP78 is an important regulator of ER stress, apoptosis, and cell survival. Under physiological conditions, GRP78 usually combines with three ER transmembrane proteins, respectively, such as double-stranded RNA-dependent protein kinase-like endoplasmic reticulum kinase (PERK), activating transcription factor 6 (ATF6) and inositol requiring enzyme-1 (IRE-1), thus maintaining their inactive state. Once the accumulation of misfolded or unfolded protein occurs in cells induced by various pathophysiological factors, GRP78 dissociates with these three proteins and initiated ER stress. PERK, ATF6, and IRE-1 can promote the refolding of new proteins and removes misfolded and unfolded proteins to restore ER homeostasis via respective pathways, playing an adaptive reaction favoring cell survival, whereas in hyperactive ER stress, the three proteins push the reaction to apoptosis by upregulating C/EBP-homologous protein (CHOP) and caspase-12 expression. CHOP promotes proapoptotic bak and Bax expression, as well as inhibiting antiapoptotic Bcl-2 expression. caspase-12, an important member of the caspase-originating inflammatory family, is the only murine protein that exists in the endoplasmic reticulum. Activated caspase-12 can be transported into the cytoplasm to bind to caspase-9 and then activate caspase-3 [10]. Both CHOP and caspase-12 lead to the classic apoptotic pathway.

Our present results showed a significant increase of brain GRP78 level in rats at 12–48 h post-CA/PCR, especially at 24–48 h, CHOP and caspase-12 also increased at 24–48 h. However, in comparison to NS treatment, GTP treatment increased GRP78 expression further, while decreased CHOP and caspase-12 expression. We considered that GTPs modulating ER stress are more favorable to eliminate misfolded and unfolded proteins resulting in adaptive reaction than intriguing CHOP and caspase-12 expression inducing apoptosis, followed by reduced caspase-3 expression and apoptotic rate. Coinciding with our study, other evidence also suggested that the increased expression of GRP78 induced in ER stress exerted cytoprotection against hypoxia-induced cell death [33]. Furthermore, in in vivo experiment, the overexpressed GRP78 exerted cardioprotective effects and mitigates cell apoptosis by suppressing ROS after myocardial I/R injury [34]. Inhibition of caspase-12 pathway can reduce neuronal apoptosis in cerebral ischemia, and caspase-12-deficient rats can resist ER stress-induced apoptosis, while other death stimuli can still induce apoptosis [29, 30, 35]. So, our study suggests that the modulation of ER stress could be potential access for alleviating brain cell death after CA/PCR.

Certainly, there are limitations existing in our current research. Our experiments did merely a preliminary research of GTPs on potential antiapoptotic mechanisms concerning ER stress and endogenous antioxidation. In further studies, ER stress agonist and inhibitor, and more antioxidant proteins need to undergo study for evaluating GTPs effects.

5. Conclusion

Our study reveals that decreased SOD expression in brain tissue after CPR implies downregulation of endogenous antioxidant capacity and dysfunction of endoplasmic reticulum stress and cell apoptosis which all may be pathological factors of CIRI. After GTPs treatment, both apoptosis-related indicators and endoplasmic reticulum stress-related proteins are reduced. We demonstrate that GTPs inhibit neuronal apoptosis involved with the increase of cerebral endogenous antioxidative ability and modulation of ER stress, which provides additional information about GTPs’ effective mechanism on cerebral protection against CIRI after CA/CPR.

Data Availability

All data and models used during the study are available from the corresponding author upon request.

Conflicts of Interest

The authors declare no conflicts of interest regarding the publication of this paper.

Authors’ Contributions

Wanxiang Hu and Huihui Wang contributed equally to this work.

Acknowledgments

This study was supported by the National Natural Science Foundation of China (nos. 81160231 and 81660312).

References

J. C. Jentzer, C. M. Clements, R. S. Wright, R. D. White, and A. S. Jaffe, “Improving survival from cardiac arrest: a review of contemporary practice and challenges,” Annals of Emergency Medicine, vol. 68, no. 6, pp. 678–689, 2016.
View at: Publisher Site | Google Scholar
Z. H. Chen, C. Z. Liu, J. Q. Huang et al., “Clinical efficacy of extracorporeal cardiopulmonary resuscitation for adults with cardiac arrest: meta-analysis with trial sequential analysis,” Bio Med Research International, vol. 2019, Article ID 6414673, 14 pages, 2019.
View at: Publisher Site | Google Scholar
T. Kilner, B. L. Stanton, and S. M. Mazur, “Prehospital extracorporeal cardiopulmonary resuscitation for out-of-hospital cardiac arrest: a retrospective eligibility study,” Emerg Med Australas, vol. 31, no. 6, pp. 1007–1013, 2019.
View at: Publisher Site | Google Scholar
G. Trummer, C. Benk, and F. Beyersdorf, “Controlled automated reperfusion of the whole body after cardiac arrest,” Journal of Thoracic Disease, vol. 11, no. Suppl 10, pp. 1464–1470, 2019.
View at: Publisher Site | Google Scholar
P. A. Nguyen Thi, M. H. Chen, N. Li, X.-Y. Zhuo, and N. Xie, “PD98059 protects brain against cells death resulting from ROS/ERK activation in a cardiac arrest rat model,” Oxidative Medicine and Cellular Longevity, vol. 2016, Article ID 3723762, 13 pages, 2016.
View at: Publisher Site | Google Scholar
J. H. Zheng, L. Xie, N. Li et al., “PD98059 protects the brain against mitochondrial-mediated apoptosis and autophagy in a cardiac arrest rat model,” Life Sciences, vol. 232, Article ID 116618, 2019.
View at: Publisher Site | Google Scholar
R. X. Wang, S. Li, and X. Sui, “Sodium butyrate relieves cerebral ischemia-reperfusion injury in mice by inhibiting JNK/STAT pathway,” European Review for Medical and Pharmacological Sciences, vol. 23, pp. 1762–1769, 2019.
View at: Google Scholar
J. Wu, Y. Chen, S. Yu et al., “Neuroprotective effects of sulfiredoxin-1 during cerebral ischemia/reperfusion oxidative stress injury in rats,” Brain Research Bulletin, vol. 132, no. 132, pp. 99–108, 2017.
View at: Publisher Site | Google Scholar
G. Qi, Y. Mi, Y. Wang et al., “Neuroprotective action of tea polyphenols on oxidative stress-induced apoptosis through the activation of the TrkB/CREB/BDNF pathway and Keap1/Nrf2 signaling pathway in SH-SY5Y cells and mice brain,” Food & Function, vol. 8, no. 12, pp. 4421–4432, 2017.
View at: Publisher Site | Google Scholar
F. Zhou, M. Wang, J. Ju et al., “Schizandrin A protects against cerebral ischemia-reperfusion injury by suppressing inflammation and oxidative stress and regulating the AMPK/Nrf2 pathway regulation,” American Journal of Translational Research, vol. 11, no. 1, pp. 199–209, 2019.
View at: Google Scholar
T. Zhang, Q. Hu, L. Y. Shi et al., “Equol attenuates atherosclerosis in apolipoprotein E-deficient mice by inhibiting endoplasmic reticulum stress via activation of Nrf2 in endothelial cells,” PLoS One, vol. 11, no. 12, Article ID e0169020, 2016.
View at: Publisher Site | Google Scholar
D. Wang, X. Yuan, C. Hu et al., “Endoplasmic reticulum stress is involved in apoptosis of detrusor muscle in streptozocin-induced diabetic rats,” Neurourology and Urodynamics, vol. 36, no. 1, pp. 65–72, 2017.
View at: Publisher Site | Google Scholar
J. P. Wu, X. Z. Li, Y. Wang et al., “Electroacupuncture combined with intracerebral injection of VEGF improves neurological dysfunction possibly by down-regulating expression of endoplasmic reticulum stress related proteins ATF 6, etc. in cerebral ischemia-reperfusion injury rats,” Zhen Ci Yan Jiu, vol. 25, no. 43, pp. 341–346, 2016.
View at: Google Scholar
Z. Xia, Y. Zhang, and J. Ren, “Endoplasmic reticulum stress and metabolic syndrome,” Acta Neuropharmacologica, vol. 2, pp. 33-34, 2012.
View at: Google Scholar
M. Zhai, C. Liu, Y. Li et al., “Dexmedetomidine inhibits neuronal apoptosis by inducing Sigma-1 receptor signaling in cerebral ischemia-reperfusion injury,” Aging, vol. 11, no. 21, pp. 9556–9568, 2019.
View at: Publisher Site | Google Scholar
H. Li, X. Zhang, X. Qi, X. Zhu, and L. Cheng, “Icariin inhibits endoplasmic reticulum stress-induced neuronal apoptosis after spinal cord injury through modulating the PI3K/AKT signaling pathway,” International Journal of Biological Sciences, vol. 15, no. 2, pp. 277–286, 2019.
View at: Publisher Site | Google Scholar
M. I. Prasanth, B. S. Sivamaruthi, C. Chaiyasut, and T. Tencomnao, “A review of the role of green tea (camellia sinensis) in antiphotoaging, stress resistance, neuroprotection, and autophagy,” Nutrients, vol. 11, no. 2, p. 474, 2019.
View at: Publisher Site | Google Scholar
D. T. Rutkowski, S. M. Arnold, C. N. Miller et al., “Adaptation to ER stress is mediated by differential stabilities of pro-survival and pro-apoptotic mRNAs and proteins,” PLoS Biology, vol. 4, no. 11, p. e374, 2006.
View at: Publisher Site | Google Scholar
C. W. Woo, D. Cui, J. Arellano et al., “Adaptive suppression of the ATF4-CHOP branch of the unfolded protein response by toll-like receptor signalling,” Nature Cell Biology, vol. 11, no. 12, pp. 1473–1480, 2009.
View at: Publisher Site | Google Scholar
A. Ceylan-Isik, R. Fliethman, L. Wold, and J. Ren, “Herbal and traditional Chinese medicine for the treatment of cardiovascular complications in diabetes mellitus,” Current Diabetes Reviews, vol. 4, no. 4, pp. 320–328, 2008.
View at: Publisher Site | Google Scholar
B. Chen, G. Liu, P. Zou et al., “Epigallocatechin-3-gallate protects against cisplatin-induced nephrotoxicity by inhibiting endoplasmic reticulum stress-induced apoptosis,” Experimental Biology and Medicine, vol. 240, no. 11, pp. 1513–1519, 2015.
View at: Publisher Site | Google Scholar
X. Zhuo, L. Xie, F. R. Shi, N. Li, X. Chen, and M. Chen, “The benefits of respective and combined use of green tea polyphenols and ERK inhibitor on the survival and neurologic outcomes in cardiac arrest rats induced by ventricular fibrillation,” The American Journal of Emergency Medicine, vol. 34, no. 3, pp. 570–575, 2016.
View at: Publisher Site | Google Scholar
M.-H. Chen, T.-W. Liu, L. Xie et al., “A simpler cardiac arrest model in rats,” The American Journal of Emergency Medicine, vol. 25, no. 6, pp. 623–630, 2007.
View at: Publisher Site | Google Scholar
F. Ryan, F. Khodagholi, L. Dargahi, D. Minai-Tehrani, and A. Ahmadiani, “Temporal pattern and crosstalk of necroptosis markers with autophagy and apoptosis associated proteins in ischemic hippocampus,” Neurotoxicity Research, vol. 34, no. 1, pp. 79–92, 2018.
View at: Publisher Site | Google Scholar
A. Nogami-Hara, M. Nagao, K. Takasaki et al., “The Japanese Angelica acutiloba root and yokukansan increase hippocampal acetylcholine level, prevent apoptosis and improve memory in a rat model of repeated cerebral ischemia,” Journal of Ethnopharmacology, vol. 214, pp. 190–196, 2018.
View at: Publisher Site | Google Scholar
L. Cong, C. H. Cao, Y. Cheng, and X. Y. Qin, “Green Green Tea Polyphenols Attenuated Glutamate Excitotoxicity via Antioxidative and Antiapoptotic Pathway in the Primary Cultured Cortical Neurons,” Oxidative Medicine and Cellular Longevity, vol. 2016, Article ID 2050435, 8 pages, 2016.
View at: Publisher Site | Google Scholar
X. Z. Zuo, C. H. Tian, N. N. Zhao et al., “Tea polyphenols alleviate high fat and high glucose-induced endothelial hyperpermeability by attenuating ROS production via NADPH oxidase pathway,” BMC Research Notes, vol. 7, no. 1, p. 120, 2014.
View at: Publisher Site | Google Scholar
C. Liu, Q. Fu, R. Mu et al., “Dexmedetomidine alleviates cerebral ischemia-reperfusion injury by inhibiting endoplasmic reticulum stress dependent apoptosis through the PERK-CHOP-Caspase-11 pathway,” Brain Research, vol. 1701, pp. 246–254, 2018.
View at: Publisher Site | Google Scholar
T. T. Kong, K. Qiu, M. Liu et al., “Orexin-A protects against oxygen-glucose deprivation/reoxygenationinduced cell damage by inhibiting endoplasmic reticulum stress-mediated apoptosis via the Gi and PI3K signalling pathways,” Cellular Signalling, vol. 62, pp. 109–348, 2019.
View at: Publisher Site | Google Scholar
G. Marwarha, B. Dasari, and O. Ghribi, “Endoplasmic reticulum stress-induced CHOP activation mediates the down-regulation of leptin in human neuroblastoma SH-SY5Y cells treated with the oxysterol 27-hydroxycholesterol,” Cellular Signalling, vol. 24, no. 2, pp. 484–492, 2012.
View at: Publisher Site | Google Scholar
Y. H. Wang, J. H. Tian, X. Qiao et al., “Intermedin protects against renal ischemia-reperfusion injury by inhibiting endoplasmic reticulum stress,” BMC Nephrology, vol. 16, p. 169, 2015.
View at: Publisher Site | Google Scholar
F. P. Emma, P. Arnau, O. Joan et al., “Relevance of endoplasmic reticulum stress cell signalling in liver cold ischemia reperfusion injury,” International Journal of Molecular Sciences, vol. 17, p. 807, 2016.
View at: Google Scholar
J.-C. Chen, M.-L. Wu, K.-C. Huang, and W.-W. Lin, “HMG-CoA reductase inhibitors activate the unfolded protein response and induce cytoprotective GRP78 expression,” Cardiovascular Research, vol. 80, no. 1, pp. 138–150, 2008.
View at: Publisher Site | Google Scholar
X. Bi, G. Zhang, X. Wang et al., “Endoplasmic reticulum chaperone GRP78 protects heart from ischemia/reperfusion injury through Akt activation,” Circulation Research, vol. 122, no. 11, pp. 1545–1554, 2018.
View at: Publisher Site | Google Scholar
W. Y. Song, F. Guo, H. X. Zhong et al., “Therapeutic window of globular adiponectin against cerebral ischemia in diabetic mice: the role of dynamic alteration of adiponectin/adiponectin receptor expression,” Scientific Reports, vol. 5, no. 1, p. 17310, 2015.
View at: Publisher Site | Google Scholar

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Copyright © 2020 Wanxiang Hu 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.

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