新加苁蓉菟丝子汤经SIRT1/PGC-1α信号通路促进线粒体生物合成以修复卵巢颗粒细胞损伤的研究

Xin Jia Congrong Tusizi Decoction Improves Mitochondrial Biogenesis of Ovarian Granulosa Cells Injury via SIRT1/PGC-1αSignaling Pathway

目的研究新加苁蓉菟丝子汤对卵巢颗粒细胞线粒体生物合成和线粒体功能的影响。方法采用雷公藤甲素建立人卵巢颗粒细胞(KGN)损伤模型,将细胞分为对照组、模型组、阳性药调经促孕丸组、新加苁蓉菟丝子汤组、沉默信息调节因子1(Silent mating type information regulator 1,SIRT1)抑制剂组和SIRT1抑制剂+新加苁蓉菟丝子汤组。用雷公藤甲素孵育6 h造成颗粒细胞功能损伤后再予SIRT1抑制剂以及空白或含药血清。干预48 h后采用CCK8法检测细胞活力;流式细胞术检测凋亡率;ELISA试剂盒检测抗苗勒激素(Anti-Müllerian,AMH)、促卵泡生成素(Follicle-stimulating hormone,FSH)和抑制素B(Inhibin B,INHB);生化试剂盒检测三磷酸腺苷(Adenosinetriphosphate,ATP)酶;JC-1法检测线粒体膜电位(Mitochondrial membrane potential,MMP);电子显微镜和荧光显微镜观察细胞线粒体形态结构、数量和活性变化;Westernblot检测SIRT1、p-SIRT1、过氧化物酶体增殖物激活受体γ辅助活化因子1(Peroxlsomeproliferator-activated receptor-γcoactlvator-1α,PGC-1α)、核呼吸因子1(Nuclear respiratory factor1,NRF1)和线粒体转录因子(Mitochondrial transcription factor A,TFAM)的蛋白表达;PCR检测SIRT1、PGC-1α、NRF1和TFAM的mRNA表达和线粒体DNA拷贝数(Mitochondrial DNA copy number,mtDNA)。结果中成药调经促孕丸和补肾养血活血复方新加苁蓉菟丝子汤均可提高颗粒细胞活力(P<0.05);降低细胞凋亡率(P<0.05);提高ATP酶活性和MMP(P<0.05);改善线粒体形态结构损伤;增加线粒体数量、活性和mtDNA表达(P<0.01),上调SIRT1、PGC-1α、NRF1和TFAM的蛋白和mRNA表达(P<0.05)。结论新加苁蓉菟丝子汤对雷公藤甲素所致卵巢颗粒细胞损伤具有保护作用,其机制可能是通过调控SIRT1/PGC-1α信号通路促进新生线粒体生物合成以改善线粒体功能障碍。

Objective To explore the effects of Xin Jia Congrong Tusizi decoction on mitochondrial biosynthesis and mitochondrial function in ovarian granulosa cells.Methods We prepared the functional injury model of human ovarian granulosa cells KGN induced by triptolide.We divided the cells into control group,model group,Tiao jing Cuyun Pill group,Xin Jia Congrong Tusizi decoction group,SIRT1 inhibitor group and SIRT1 inhibitor+Xin Jia Congrong Tusizi decoction group.After 6 h incubation with triptolide to cause functional impairment of granulosa cells,SIRT1 inhibitor,blank serum and medicated serum were added for 48 h.Cell viability and apoptosis rate were assessed using CCK-8 and flow cytometry.Anti-Müllerian(AMH),follicle-stimulating hormone(FSH)and inhibin B(INHB)were detected by ELISA.ATP enzyme and MMP were used to detect by biochemical kit and JC-1 method.apoptosis rate and MMP were assessed using flow cytometry.The morphology,structure,quantity and activity changes of mitochondria were observed by electron microscope and fluorescence microscope.Western blot and PCR were used to detect the protein and mRNA expressions of SIRT1,p-SIRT1,PGC-1α,NRF1 and TFAM.Results Chinese patent medicine TiaojingCuyun Pill and bushen Yangxue Huoxue therapy compound Xin Jia Congrong Tusizi decoction augmented the activity of granulosa cells(P<0.05),decreased the apoptosis rate(P<0.05),increased ATP enzyme and MMP(P<0.05),improved mitochondrial morphological and structural damage,added the mtDNA level,the number and activity of mitochondria(P<0.01)and upregulated and the protein and mRNA expressions of SIRT1,PGC-1α,NRF1,TFAM(P<0.05).Conclusion Xin Jia Congrong Tusizi decoction protected ovarian granulosa cells damage caused by triptolide.Its mechanism may related to improve mitochondrial dysfunction by regulating SIRT1/PGC-1αsignaling pathway in order to promote the biosynthesis of new mitochondria.