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O-GlcNAc转移酶通过调节线粒体呼吸链复合体I的活性来调节卵细胞成熟
Zhiming Ding1, Caiyun Wu1, Xuanxi Li1
1Department of Obstetrics and Gynecology, NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract, the First Affiliated Hospital of Anhui Medical University, No 218 Jixi Road, Hefei 230022, Anhui, China; Engineering Research Center of Biopreservation and Artificial Organs, Ministry of Education, No 218 Jixi Road, Hefei 230022, Anhui, China; Key Laboratory of Population Health Across Life Cycle (Anhui Medical University),Ministry of Education of the People's Republic of China, No 81 Meishan Road, Hefei, 230032, Anhui, China; Anhui Provincial Key Laboratory of Reproductive Disorders and Obstetrics and Gynaecology Diseases, No 218 Jixi Road, Hefei 230022, Anhui, China; Biopreservation and Artificial Organs, Anhui Provincial Engineering Research Center, Anhui Medical University, No 218 Jixi Road, Hefei 230022, Anhui, China; Anhui Provincial Institute of Translational Medicine, No 81 Meishan Road, Hefei 230032, Anhui, China.
O-GlcNAc转移酶 (OGT) 对于女性生育至关重要. 卵细胞中OGT缺乏会损害卵细胞的成熟,并通过破坏线粒体功能和螺旋组装检查点导致不孕症.
科学领域:
- 生殖生物学 生殖生物学
- 细胞的新陈代谢
- 分子遗传学 分子遗传学
背景情况:
- 异常的卵细胞半转化是女性不孕症的主要原因.
- 由O-GlcNAc转移酶 (OGT) 介导的O-GlcNAcylation是一种关键的翻译后修饰,但其在卵细胞成熟中的作用尚不清楚.
研究的目的:
- 研究OGT在小鼠卵细胞成熟过程中的功能及其对女性生育能力的影响.
- 阐明OGT在卵细胞发育中的作用背后的分子机制.
主要方法:
- 使用Gdf9-Cre.使用小鼠卵细胞中Ogt的有条件淘汰.
- 分析卵细胞成熟,卵泡发育,状染色体对齐,以及基内托科尔 - 微管附着的情况.
- 多omics分析,包括对线粒体功能的评估 (呼吸链复合物I,NADH转化为NAD+,膜潜力,ATP产生).
- 同免疫沉,然后进行质谱测量以确定蛋白质相互作用.
主要成果:
- 卵细胞的绝杀导致女性完全不育,成熟受损和毛囊发育缺陷.
- 缺少OGT会损害运动 - 微管附着物,激活螺旋组装检查点,并导致介质停止.
- 八次淘汰赛破坏了线粒体呼吸链复合物I功能,NADH转化为NAD+以及ATP的产生.
- OGT与线粒体复合物I子单元NDUFA8相互作用,其耗尽降低了NDUFA8蛋白水平.
结论:
- OGT对于卵细胞成熟和雌性繁殖至关重要.
- 通过维护线粒体呼吸链复合物I功能,OGT调节卵细胞半转化和女性生育能力.
- 在卵细胞发育过程中,OGT与NDUFA8的相互作用对线粒体完整性和功能至关重要.
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