Tetrahydroxystilbene glucoside protects against cerebral ischemia / reperfusion injury by inhibiting expression of NADPH oxidase in mice
Received:October 10, 2018  
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DOI:10. 3969 / j.issn.1005-4847. 2019. 02. 013
KeyWord:TSG; cerebral ischemia reperfusion; NADPH oxidase; ROS; apoptosis; mice
                 
AuthorInstitution
薛威 安徽医科大学药理学教研室抗炎免疫药理学教育部重点实验室国家中医药管理局中药药理三级实验室
唐虹 安徽医科大学药理学教研室抗炎免疫药理学教育部重点实验室国家中医药管理局中药药理三级实验室
孙雨倩 安徽医科大学临床医学院
江勤 安徽医科大学药理学教研室抗炎免疫药理学教育部重点实验室国家中医药管理局中药药理三级实验室
黄大可 安徽医科大学基础医学院,合肥
董六一 安徽医科大学药理学教研室抗炎免疫药理学教育部重点实验室国家中医药管理局中药药理三级实验室
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Abstract:
      Objective To investigate the protective effect of tetrahydroxystilbene glucoside (TSG) on cerebral ischemia/ reperfusion (I/ R) injury in mice. Methods One-hundred mice were divided randomly into five groups of 20mice each: sham, I/ R group, and low TSG (3 mg/ kg), medium TSG (6 mg/ kg) and high TSG (12 mg/ kg) groups. Themice underwent cerebral ischemia for 2 h by ligation of bilateral common carotid arteries, and were sacrificed 24 h afterreperfusion. Pathology of the brain tissues was assessed by hematoxylin and eosin (H&E) staining. Reactive oxygen species(ROS) levels in brain tissues were measured by dihydroethidium staining and electron spin resonance spectroscopy.Expression of the proteins of NADPH oxidase (NOX) 4 and cleaved caspase (CC)-3 and CC-9 in brain tissues weredetected by Western blot. Results Compared with the sham group, there was deformation and swelling of neurons,pyknosis and anachromasis of nuclei as well as shrunken cell bodies in the I/ R group. ROS levels were increasedsignificantly, and expression of NOX4, CC-3 and CC-9 was up-regulated significantly in the I/ R group. Compared with theI/ R group, TSG expression reduced markedly the pathological damages in brain tissues after cerebral I/ R. TSG downregulatedthe protein level of NOX4 significantly according to the Western blot. Dihydroethidium staining indicated that TSGdecreased ROS levels and inhibited the activity of CC-3 and CC-9 in the ischemic cortex after reperfusion. Conclusions TSG has neuroprotective effects on cerebral I/ R injury in mice. TSG may be associated with inhibiting expression of NOX4protein, thereby reducing ROS levels, and inhibiting overexpression of the apoptosis-related proteins CC-3 and CC-9.
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