miR-27a通过过氧化物酶体增殖物激活受体γ/葡萄糖转运蛋白4调控多囊卵巢综合征卵巢颗粒细胞功能的研究  

miR-27a through PPARγ/GluT4 signal pathway regulates the function of ovarian granulosa cells in polycystic ovary syndrome

作　　者：王睿 郭清民 尹正芳 熊正方[1] WANG Rui;GUO Qingfang;YIN Zhengfang(Center of Reproductive Medicine,Qinghai Provincial People's Hospital,Xining 810000,China)

机构地区：[1]青海省人民医院生殖医学中心,西宁810000 [2]青海省人民医院妇科,西宁810000

出　　处：《中国糖尿病杂志》2024年第1期51-58,共8页Chinese Journal of Diabetes

基　　金：青海省卫健委医药卫生科技项目(2020-wjzdx-32);2020年中科院西部之光(科发人字[2020]59号);2020年高原名医人才培养项目(青人才字[2020]10号)。

摘　　要：目的探讨PPARγ/GluT4在颗粒细胞IR、细胞增殖和凋亡中的作用。方法选取2018年8月至2020年8月于青海省人民医院生殖医学中心接受常规IVF-ET辅助生殖治疗的多囊卵巢综合征(PCOS)已婚患者45例,根据胰岛素抵抗指数(HOMA-IR)分为IR组(PCOS-IR组,HOMA-IR≥2.57,n=23)和非IR组(PCOS-NIR组,HOMA-IR<2.57,n=22),另选取同期本院因男性或输卵管因素的已婚不孕患者为对照组(Con,n=21)。miR-27a模拟物(miR-27a mimics)、miR-27a抑制剂(miR-27a inhibitor)和相应对照(mimics NC和inhibitor NC)转染PCOS-IR组颗粒细胞,分为miR-27a mimics组、miR-27a inhibitor组、mimics-NC组和inhibitor-NC组。双荧光素酶报告试验证实miR-27a与PPARγ结合。CCK-8法和Annexinv-FITC/PI法检测细胞增殖和凋亡。定量实时PCR和Western blot法分别检测miR-27a、GluT4、PPARγ、B淋巴细胞瘤-2相关X(Bax)、活化型半胱氨酸天冬氨酸蛋白酶3(Cleaved caspase-3)、B淋巴细胞瘤2(Bcl-2)蛋白表达。结果与Con组比较,PCOS-NIR、PCOS-IR组miR-27a表达升高(P<0.01),PPARγmRNA和蛋白表达降低(P<0.01)。与PCOS-NIR组比较,PCOS-IR组miR-27a表达升高(P<0.05),PPARγmRNA和蛋白表达降低(P<0.01)。双荧光素酶报告显示,PPARγ和miR-27a之间有靶向结合位点。与inhibitor-NC组比较,miR-27a inhibitor组24、48、72和96 h时细胞活性升高(P<0.05或P<0.01),miR-27a inhibitor、mimics-NC组凋亡率降低(P<0.05或P<0.01),miR-27a mimics组凋亡率升高,48、72和96 h时细胞活性降低(P<0.01)。与miR-27a inhibitor组比较,mimics-NC、miR-27a mimics组凋亡率升高,24、48、72和96 h时细胞活性降低(P<0.05或P<0.01)。与inhibitor-NC组比较,miR-27a mimics组miR-27a、Bax和Cleaved caspase-3蛋白表达升高(P<0.05或P<0.01),GluT4、PPARγ、Bcl-2蛋白表达降低(P<0.01),miR-27a inhibitor组GluT4、PPARγ、Bcl-2蛋白表达表达升高(P<0.05或P<0.01),miR-27a、Bax和Cleaved caspase-3蛋白降低(P<0.01)。与miR-27a inhibitor组比较,mimics-NC、miR-27a mimics组miR-27a、BObjective To investigate the role of PPARγ/GluT4 axis in insulin resistance(IR),cell proliferation and apoptosis of granulosa cells.Methods A total of 45 married women with PCOS who received routine IVF-ET assisted pregnancy treatment in Center of Reproductive Medicine,Qinghai Provincial People's Hospital were enrolled in this study from August 2018 to August 2020.All the patients were divided into IR group(PCOS-IR group,HOMA-IR≥2.57,n=23)and non-IR group(PCOS-NIR group,HOMA-IR<2.57,n=22)according to HOMA-IR.Meanwhile,21 married patients with infertility due to male or fallopian tube factors were enrolled as control group(Con).miR-27a mimics,miR-27a inhibitors(miR-27a inhibitor)and corresponding controls(mimics NC and inhibitor NC)transfected PCOS-IR granulosa cells,which were then divided into miR-27a mimics group,miR-27a inhibitor group,mimics-NC group and inhibitor-NC group.Double luciferase report test confirmed that miR-27a binded to PPARγ.Cell proliferation and apoptosis were detected by CCK-8 method and Annexinv-FITC/PI method.The expression of miR-27a,GluT4,PPARγ,Bax related to B lymphomas-2,Cleaved caspase-3 and B lymphomas-2(Bcl-2)were detected by RT-qPCR and Western blot respectively.Results Compared with Con group,the expression of miR-27a increased(P<0.01),while the expression of PPARγmRNA and protein decreased in PCOS-NIR and PCOS-IR groups(P<0.01).Compared with PCOS-NIR group,the expression of miR-27a increased(P<0.05),while the expression of PPARγmRNA and protein decreased in PCOS-IR group(P<0.01).The double luciferase report showed that there was a targeted binding site between PPARγand miR-27a.Compared with inhibitor-NC group,the cell activity increased at 24 h,48 h,72 h and 96 h in miR-27a inhibitor group(P<0.05 or P<0.01),while the apoptosis rate decreased inmiR-27a inhibitor and mimics-NC group(P<0.05 or P<0.01).Compared with miR-27a inhibitor group,the apoptosis rate increased,and the cell activity decreased at 24,48,72 and 96 h in mimics-NC and miR-27a mimics groups(P<0.05 or P<0.01

关 键 词：miR-27a 过氧化物酶体增殖物激活受体Γ 葡萄糖转运蛋白4 颗粒细胞 多囊卵巢综合征 

分 类 号：R714.8[医药卫生—妇产科学]