介质阶段特定的卵细胞玻璃化对小鼠卵细胞质量和发育能力的影响
Dongmei Deng1,2, Juan Xie1,2, Yin Tian1,2
1Chongqing Key Laboratory of Human Embryo Engineering, Center for Reproductive Medicine, Chongqing Health Center for Women and Children, Chongqing, China.
Frontiers in endocrinology
|July 17, 2023
概括
使用玻璃化卵子来保护生育能力对于癌症的治疗至关重要. 在体外成熟后在MII阶段对卵细胞进行玻璃化,比在GV阶段进行玻璃化提供更好的质量和发育能力.
科学领域:
- 生殖生物学 生殖生物学
- 低温生物学 低温生物学
- 发育生物学是发展生物学.
背景情况:
- 对需要立即治疗的癌症患者来说,保持生育能力 (FP) 是至关重要的.
- 卵子冷保存提供FP的好处,主要有两种方法:在体外成熟 (IVM) 之前对胚芽囊泡 (GV) 阶段卵子进行玻璃化或在IVM后对第II (MII) 阶段卵子进行玻璃化.
- 立即FP的最佳方法仍未确定.
研究的目的:
- 为了比较在GV阶段化的小鼠卵细胞的质量和发育能力,与IVM后的MII阶段进行比较,以立即保护生育能力.
- 为了确定最适合的卵细胞玻璃化方法,需要快速FP的患者.
主要方法:
- 在没有激素刺激的情况下收集了小鼠卵细胞.
- 卵细胞在GV阶段 (GV-VI) 或IVM后的MII阶段 (MII-VI) 进行了玻璃化.
- 非玻璃化体外成熟的MII卵细胞作为对照 (CON);质量和发育能力被评估.
主要成果:
- 在GV-VI,MII-VI和CON组之间没有观察到IVM和生存率的显著差异.
- 与MII-VI和CON.相比,GV-VI卵细胞的质量较差 (脊柱异常,线粒体功能障碍,亡).
- GV-VI影响了母亲的mRNA降解,导致胚胎发育能力下降和异常的胚胎基因组激活.
结论:
- 在GV阶段的玻璃化损害了卵细胞质量,并降低了发育能力.
- 与GV阶段的玻璃化相比,在IVM后的MII阶段的卵细胞玻璃化更适合直接的FP.
- 这一发现有助于为需要快速保存生育能力的患者选择最佳的冷保存策略.
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