针刺研究2026，Vol.51Issue(4)：415-424,10.DOI:10.13702/j.1000-0607.20250123
电针调控IRS-1/PI3K/AKT信号通路和葡萄糖转运蛋白缓解脑卒中后认知障碍大鼠学习记忆损伤的作用机制
Mechanism of electroacupuncture in alleviating learning and memory impairment in rats with post-stroke cognitive impairment by regulating the IRS-1/PI3K/AKT signaling pathway and glucose transporters
摘要
Abstract
Objective To observe the effect of electroacupuncture(EA)on the insulin receptor substrate(IRS)-1/phosphatidylinositol 3-kinase(PI3K)/protein kinase B(AKT)signaling pathway and glucose transporters(GLUTs)in the hippocampus of rats with learning and memory impairment after cerebral ischemia-reperfusion injury,so as to explore the mechanism of EA in improving learning and memory impairment in rats with post-stroke cognitive impairment.Methods Fifteen rats were randomly selected from 100 male Sprague-Dawley(SD)rats as the sham operation group,and the remaining 85 rats were subjected to middle cerebral artery occlusion/reperfusion(MCAO/R)modeling using the suture method.Successfully modeled rats were divided into the model,EA,inhibitor,EA+inhibitor,and donepezil groups,with 15 rats in each group,in which,rats in the inhibitor group and EA+inhibitor group were given an intracerebroventricular injection of the pathway inhibitor LY294002(10 mmol/L,10 μL)into the left lateral ventricle 30 min before modeling.Rats in the EA group and EA+inhibitor group received EA intervention at"Shenting"(GV24)and"Baihui"(GV20)acupoints,30 min per session,once a day.Rats in the donepezil group were given donepezil by gavage at a dose of 0.92 mg·kg-1·d-1,once a day.Rats in the treatment group were given continuous intervention for 14 d.Zea-Longa scoring and novel object recognition test were used to evaluate neurological damage and learning and memory ability;TTC staining was used to assess cerebral infarct volume;HE staining was used to observe the pathological morphology changes of hippocampal tissue in the infarcted area;a glucose detection kit was used to measure hippocampal glucose content;qPCR was used to detect the mRNA expressions of IRS-1,PI3K,and AKT in the hippocampus;Western blot was used to detect the protein expressions of IRS-1,PI3K,phosphorylated(p)-PI3K,AKT,p-AKT,GLUT1,and GLUT3 in the hippocampus.Results Compared with the sham operation group,the model group showed sparse hippocampal cells with pyknosis and hyperchromatism,increased neurological deficit score,cerebral infarct volume,and recognition index to novel objects(P<0.01),decreased glucose content(P<0.01),significantly up-regulated protein and mRNA expressions of IRS-1 in the hippocampus(P<0.01),and significantly down-regulated p-PI3K/PI3K ratio,p-AKT/AKT ratio,mRNA expressions of PI3K and AKT,and protein expressions of GLUT1 and GLUT3(P<0.01).Compared with the model group,the EA group and donepezil group showed neatly arranged hippocampal cells with clear outlines,and the other indicators were reversed(P<0.01,P<0.05).Compared with the EA group,the EA+inhibitor group showed a reduction in the number of neurons with a small amount of vacuolation and necrosis,and the reversal effects of EA on all indicators except the neurological deficit score were weakened(P<0.05,P<0.01).Conclusion EA at GV24 and GV20 may improve the learning and memory function of MCAO/R rats by activating the IRS-1/PI3K/AKT signaling pathway to inhibit insulin resistance and enhance the glucose transport capacity of neurons.关键词
脑卒中/认知障碍/电针/胰岛素受体底物-1/磷脂酰肌醇3-激酶/蛋白激酶B信号通路/葡萄糖转运蛋白/胰岛素抵抗Key words
Stroke/Cognitive impairment/Electroacupuncture/IRS-1/PI3K/AKT signaling pathway/Glucose transporters/Insulin resistance引用本文复制引用
万俊,肖雨倩,孙可心,陈淑颖,陈丽敏,王岩,白艳杰,冯慧利,李彦杰..电针调控IRS-1/PI3K/AKT信号通路和葡萄糖转运蛋白缓解脑卒中后认知障碍大鼠学习记忆损伤的作用机制[J].针刺研究,2026,51(4):415-424,10.基金项目
河南省中医药传承与创新人才工程(仲景工程)中医药学科拔尖人才项目(No.CZ0237-08) （仲景工程）
河南省卫健委国家中医临床研究基地科研专项(No.2022JDZX005) （No.2022JDZX005）
河南省中医药拔尖人才培养项目专项课题(No.2022ZYBJ07) （No.2022ZYBJ07）
河南省中医药科学研究专项(No.2019JDZX2016) （No.2019JDZX2016）
