针刺研究2023，Vol.48Issue(12)：1258-1265,8.DOI:10.13702/j.1000-0607.20230007
基于PI3K/Akt/mTOR信号通路探讨电针治疗原发性痛经大鼠的机制
Mechanisms of acupuncture for primary dysmenorrhea based on PI3K/Akt/mTOR signaling pathway in rats
摘要
Abstract
Objective To observe the effect of electroacupuncture(EA)on phosphatidylinositol-3-kinases(PI3K)/protein kinase B(Akt)/mammalian target of rapamycin(mTOR)signaling pathway of uterus tissue in rats with pri-mary dysmenorrhea(PDM),so as to investigate its mechanisms underlying improvement of PDM.Methods Thirty healthy non-pregnant female SD rats were randomly divided into blank,model and EA groups,with 10 rats in each group.The PDM model was established by subcutaneous injection of estradiol diphenhydrate combined with intraperito-neal injection of oxytocin.For rats of the EA group,EA(50 Hz,a tolerable current intensity)was applied to"Guanyuan"(CV4)and bilateral"Sanyinjiao"(SP6)for 20 min,once a day for 10 consecutive days.The number of writhing,wri-thing score,and writhing latency were observed.The uterine histopathological changes were observed by H.E.staining,and the ultrastructural changes of uterine tissue cells in each group were observed by transmission electron microscopy.The contents of prostaglandin E2(PGE2),prostaglandin F2α(PGF2α)and ratios of PGF2α/PGE2 in the serum and uterine tissue were detected by ELISA.The relative expression levels of PI3K,Akt and mTOR and their phosphorylation proteins in the uterine tissue were detected by Western blot and the ratios were calculated.Results Compared with the blank group,the number and score of writhing,latency of writhing,pathological injury score,contents of PGF2α and ratios of PGF2α/PGE2 in the serum and uterine tissue,and the levels of p-PI3K/PI3K,p-Akt/Akt and p-mTOR/mTOR in the uterine tissue were significantly increased in the model group(P<0.01,P<0.05),while contents of PGE2 in the serum and uterine tissue were reduced(P<0.05).In comparison with the model group,the number of writhing and writhing score,pathological injury score,contents of PGF2α and ratios of PGF2α/PGE2 in both the serum and uterine tissue,the levels of p-PI3K/PI3K,p-Akt/Akt and p-mTOR/mTOR were obviously decreased(P<0.05,P<0.01),whereas the writhing latency was considerably prolonged in the EA group(P<0.01),with elevated contents of PGE2 in the serum and uterine tissue(P<0.05).H.E.staining showed slight dilation of uterine glandular cavity,and severe endometrial edema with extensive cell shedding and a large number of vacuole-like degeneration,apoptosis,pyknosis or fragmen-tation or disappearance of the nucleus,and neutrophil infiltration in the model group,which were relatively milder in the EA group.Ultrastructural results showed irregular fibroblasts of uterine tissue cells,obvious cytoplasmic edema,reduc-tion in cytoplasmic electron density,seriously irregular nuclei,severe edema of mitochondria with dissolved matrix,fracture and disappearance of mitochondrial crests and vacuolation,and moderate dilation of rough endoplasmic reticu-lum in the model group,which were milder in the EA group.Conclusion EA can improve pain and uterine inflamma-tory response in PDM rats,which may be associated with its functions in reducing uterine PGF2α and down-regulating PI3K/Akt/mTOR signaling.关键词
电针/原发性痛经/前列腺素F2α/磷脂酰肌醇3-激酶/蛋白激酶B/哺乳动物雷帕霉素靶蛋白信号通路Key words
Electroacupuncture/Primary dysmenorrhea/Prostaglandin F2α/Phosphatidylinositol-3-kinases/protein kinase B/mammalian target of rapamycin signaling pathway分类
医药卫生引用本文复制引用
潘思安,刘余,汪少华,薛晓,袁菡钰,李娟,岳增辉..基于PI3K/Akt/mTOR信号通路探讨电针治疗原发性痛经大鼠的机制[J].针刺研究,2023,48(12):1258-1265,8.基金项目
国家自然科学基金项目(No.82004490) （No.82004490）
湖南省自然科学基金青年项目(No.2021JJ40402) （No.2021JJ40402）
湖南省教育厅创新平台开放基金项目(No.20K091) （No.20K091）
