机构地区:[1]河北中医药大学,河北省心脑血管病中医药防治研究重点实验室,河北石家庄050091
出 处:《中国病理生理杂志》2025年第3期481-491,共11页Chinese Journal of Pathophysiology
基 金:国家自然科学基金资助项目(No.81873180);河北省自然科学基金资助项目(No.H2022423382);河北省中医药管理局科研计划项目(No.2021101);校级燕赵医学项目(No.YZZZ2023009);青年教师科研能力提升项目(No.JCYJ2022009)。
摘 要:目的:探讨补阳还五汤(Buyang-Huanwu decoction,BYHWD)是否通过调节脑微血管内皮细胞(brain microvascular endothelial cells,BMECs)自噬发挥对脑缺血再灌注损伤(cerebral ischemia-reperfusion injury,CIRI)大鼠的脑保护作用。方法:(1)制备大鼠大脑中动脉栓塞/再灌注(middle cerebral artery occlusion/reperfusion,MCAO/R)模型,分为假手术(sham)组、模型(MCAO/R)组、BYHWD组和丁苯酞(3-n-butylphthalide,NBP)组。通过Zea Longa评分法检测各组大鼠神经功能缺损情况;2,3,5-氯化三苯基四氮唑(2,3,5-triphenyltetrazolium chloride,TTC)染色测定脑梗死体积;HE染色观察皮质缺血半暗带区的病理损伤情况;伊文思蓝(Evans blue,EB)染色检测血脑屏障(blood-brain barrier,BBB)通透性;透射电镜观察BMECs的超微结构;免疫荧光双染观察自噬相关蛋白微管相关蛋白1轻链3(microtubule-associated protein 1 light chain 3,LC3)在BMECs中的表达情况及阳性细胞率;Western blot法检测大鼠脑缺血半暗带皮质区紧密连接蛋白ZO-1、claudin-5和occludin的表达水平。(2)制备大鼠BMECs氧糖剥夺/复氧复糖(oxygen-glucose deprivation/reoxygenation,OGD/R)模型。(1)将大鼠BMECs分为正常对照(control,CON)组、OGD/R组、二甲基亚砜组、雷帕霉素组和3-甲基腺嘌呤组,用单丹酰尸胺(monodansylcadaverine,MDC)染色观察细胞的自噬程度;(2)将大鼠BMECs分为CON组、OGD/R组、含BYHWD血清(BYHWD-containing serum,BHDS)组和NBP组,CCK-8法检测细胞活力,MDC染色和Western blot方法检测细胞自噬程度。结果:(1)与sham组相比,MCAO/R组神经功能学评分增高(P<0.01);脑梗死体积增加(P<0.01);缺血半暗带区损伤严重,组织结构紊乱,细胞间隙增宽、结构消失;EB染料渗透严重(P<0.01);BMECs结构被破坏,细胞膜结构损伤,高尔基体肿胀,内质网囊泡化扩张,线粒体损伤;LC3+CD31+/CD31+比值显著升高(P<0.01);ZO-1、claudin-5和occludin蛋白的表达水平升高(P<0.05)。与MCAO/R组相比,BYHWD组和NBP组�AIM:This study aims to investigate the protective effect of Buyang-Huanwu decoction(BYHWD)on cerebral ischemia-reperfusion injury(CIRI)in rats,focusing on its role in regulating the autophagy of cerebral microvascular endothelial cells(BMECs).METHODS:(1)We established a rat model of middle cerebral artery occlusion/reperfusion(MCAO/R)and divided the subjects into four groups:sham group,model(MCAO/R)group,BYHWD group,and 3-n-butylphthalide(NBP)group.Neurological deficits were assessed using the Zea Longa score,while the volume of cerebral infarction was measured through 2,3,5-triphenyltetrazolium chloride(TTC)staining.Pathological damage in the ischemic penumbra was evaluated using HE staining,and blood-brain barrier(BBB)permeability was assessed by Evans blue(EB)staining.The ultrastructure of BMECs was analyzed by transmission electron microscopy,and the co-expression and positive cell rate of microtubule-associated protein 1 light chain 3(LC3)in BMECs were determined through immunofluorescence double staining.Additionally,the protein expression levels of ZO-1,claudin-5 and occludin in the cortical region of the ischemic penumbra in rats were examined using Western blot analysis.(2)A rat BMEC model of oxygen-glucose deprivation/reoxygenation(OGD/R)was also established.Rat BMECs were categorized into normal control(CON),OGD/R,dimethyl sulfoxide(DMSO),rapamycin and 3-methyladenine groups to observe autophagy levels by monodansylcadaverine(MDC)staining.Furthermore,rat BMECs were divided into CON,OGD/R,BYHWD-containing serum(BHDS)and NBP groups.The cell autophagy was assessed by MDC staining and Western blot,while cell viability was measured by CCK-8 assay.RESULTS:(1)The rats in MCAO/R group exhibited significantly higher neurological scores(P<0.01)and increased cerebral infarction volumes(P<0.01)compared with sham group.Severe damage in the ischemic penumbra was observed,characterized by disordered tissue structure,widened intercellular spaces,and compromised cellular integrity.The EB dye permeability was notably el
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