白藜芦醇通过上调HIF-1α/BNIP3通路诱导自噬而减轻大鼠脑缺血再灌注损伤  

Resveratrol alleviates cerebral ischemia-reperfusion injury in rats by activating autophagy via up-regulation of HIF-1α/BNIP3 pathway

作　　者：张小良 高赛红 杨迎春 张敬孝 ZHANG Xiaoliang;GAO Saihong;YANG Yingchun;ZHANG Jingxiao(Department of Anatomy,Fenyang College of Shanxi Medical University,Fenyang 032200,China;Fenyang Hospital,Shanxi Province,Fenyang 032200,China)

机构地区：[1]山西医科大学汾阳学院解剖教研室,山西汾阳032200 [2]山西省汾阳医院,山西汾阳032200

出　　处：《中国病理生理杂志》2024年第7期1253-1260,共8页Chinese Journal of Pathophysiology

基　　金：吕梁市重点社会发展项目(No.2021SHFZ-2-102);山西医科大学汾阳学院科技扶持项目(No.2019C03)。

摘　　要：目的:研究白藜芦醇(resveratrol,Res)上调缺氧诱导因子1α(hypoxia-inducible factor-1α,HIF-1α)/BCL2-腺病毒E1B 19 kD相互作用蛋白3(BCL2-adenovirus E1B 19 kD-interacting protein 3,BNIP3)信号通路诱导自噬,减轻大鼠脑缺血再灌注损伤(cerebral ischemia-reperfusion injury,CIRI)的机制。方法:120只SD大鼠,随机分为6组:假手术(sham)组、CIRI组、Res组、Res+HIF-1α激动剂CoCl2组、Res+HIF-1α抑制剂2-甲氧基雌二醇(2-methoxyestradiol,2ME2)组和Res+3-自噬抑制剂甲基腺嘌呤(3-methyladenine,3-MA)组,手术造模失败去除12只,每组18只。CIRI组、Res组、Res+CoCl2组、Res+2ME2组和Res+3-MA组大鼠采用线栓法制备大脑中动脉闭塞(middle cerebral artery occlusion,MCAO)模型,缺血2 h后再灌注24 h。sham组大鼠行MCAO造模手术但不插入栓线。Zea Longa改良评分法评估大鼠神经行为功能,TTC染色测量大鼠脑梗死体积,免疫组化法、免疫印迹法检测大鼠大脑皮质区HIF-1α、BNIP3、beclin-1和哺乳动物雷帕霉素靶蛋白(mammalian target of rapamycin,mTOR)蛋白表达水平。结果:与CIRI组比较,Res治疗后大鼠自主行为功能明显改善,脑梗死体积减小,脑组织HIF-1α、BNIP3和beclin-1蛋白表达增加,mTOR蛋白表达减少。与Res组比较,Res+CoCl2组治疗后大鼠自主行为功能进一步改善,脑梗死体积进一步减小,脑组织HIF-1α、BNIP3和beclin-1蛋白表达增加,mTOR蛋白表达减少;Res+2ME2组和Res+3-MA组大鼠神经行为功能减弱,脑梗死体积增加,脑组织HIF-1α、BNIP3和beclin-1蛋白表达减少,mTOR蛋白表达增加。结论:白藜芦醇可能通过上调HIF-1α/BNIP3通路,继而激活自噬,从而减轻大鼠CIRI。AIM:To investigate the mechanism by which resveratrol(Res)up-regulates the hypoxia-inducible factor-1α(HIF-1α)/BCL2-adenovirus E1B 19 kD-interacting protein 3(BNIP3)signaling pathway to induce autophagy,thereby alleviating cerebral ischemia-reperfusion injury(CIRI)in rats.METHODS:Totally 120 SD rats were randomly divided into 6 groups:sham group,CIRI group,Res group,Res+HIF-1αactivator CoCl2 group,Res+HIF-1αinhibitor 2-methoxyestradiol(2ME2)group,and Res+autophagy inhibitor 3-methyladenine(3-MA)group.Twelve rats with failed surgical modeling were excluded,leaving 18 rats in each group.The rats in CIRI group,Res group,Res+CoCl2 group,Res+2ME2 group and Res+3-MA group were subjected to middle cerebral artery occlusion(MCAO)modeling using the suture method,with 2 h of ischemia followed by 24 h of reperfusion.The rats in sham group underwent MCAO modeling surgery without suture insertion.The Zea Longa modified scoring method was used to assess rat neurological behavior,TTC staining was used to measure rat cerebral infarct volume,and immunohistochemistry and immunoblotting were performed to detect the expression levels of HIF-1α,BNIP3,beclin-1 and mammalian target of rapamycin(mTOR)proteins in the rat cerebral cortex.RESULTS:Compared with CIRI group,the rats treated with Res showed significantly improved spontaneous behavioral function and reduced cerebral infarct volume.The expression of HIF-1α,BNIP3 and beclin-1 proteins increased,while mTOR protein expression decreased in rat brain tissue.Compared with the Res group,rats treated with Res+CoCl2 showed further improvement in spontaneous behavioral function and further reduction in cerebral infarct volume.The expression of HIF-1α,BNIP3 and beclin-1 proteins increased,while mTOR protein expression decreased in rat brain tissue.Rats in the Res+2ME2 and Res+3-MA groups exhibited weakened neurological function and increased cerebral infarct volume,accompanied by decreased expression of HIF-1α,BNIP3 and beclin-1 proteins,and increased expression of mTOR protein in

关 键 词：白黎芦醇 缺血再灌注损伤 缺氧诱导因子1Α 自噬 

分 类 号：R742[医药卫生—神经病学与精神病学] R285.5[医药卫生—临床医学] R363.2