在双相电容IVM (CAPA-IVM) 期间,低氧张力对高氧张力对人类卵细胞成熟的影响
Huy H Pham1,2, Viet Q Tran3,4, Anh H Le3,4
1IVFMD Phu Nhuan, My Duc Phu Nhuan Hospital, Ho Chi Minh City, Vietnam. huy.ph@myduchospital.vn.
Journal of assisted reproduction and genetics
|March 29, 2025
概括
在双相CAPA-IVM (体外持续环境卵细胞成熟) 期间降低氧气压力显著降低了卵细胞成熟和受精率. 高氧张力 (20%) 是改善体外成熟结果的最佳选择.
科学领域:
- 生殖生物学 生殖生物学
- 在试管婴儿受精体外受精.
- 卵细胞成熟的过程
背景情况:
- 优化体外成熟 (IVM) 条件对于提高试管婴儿成功率至关重要.
- 多囊卵巢综合征 (PCOS) 在卵细胞成熟过程中提出了独特的挑战.
- 双相CAPA-IVM为卵细胞成熟提供了一种新的方法.
研究的目的:
- 为了研究低 (5%) 与高 (20%) 氧气张力在双相CAPA-IVM期间对卵细胞成熟率的影响.
- 评估氧气紧张对后续受精和胚胎发育的影响.
主要方法:
- 进行了一项试点研究,涉及PCOS参与者的兄弟卵子.
- 累积卵细胞复合体 (COCs) 在低 (5%) 或高 (20%) 氧张力下培养.
- 卵细胞成熟率是主要结果,受精和胚胎发育率是次要结果.
主要成果:
- 低氧张力下 (53.6%) 的卵细胞成熟率明显低于高氧张力 (65.8%) 的卵细胞成熟率.
- 在低氧组 (61.5%vs. 72.7%) 中,双原核受精率也显著降低.
- 虽然在统计学上不显著,但在低氧组的第3天胚胎,胚芽细胞和优质胚芽细胞的数量较低.
结论:
- 在双相CAPA-IVM期间的低氧张力 (5%) 对卵细胞成熟和受精率产生负面影响.
- 在这种IVM协议中,高氧张力 (20%) 似乎更有利于实现最佳结果.
- 氧气张力是优化体外卵细胞成熟的关键因素.
相关概念视频
Meiosis II
Meiosis II is the second and final stage of meiosis. It relies on the haploid cells produced during meiosis I, each of which contain only 23 chromosomes—one from each homologous initial pair. Importantly, each chromosome in these cells is composed of two joined copies, and when these cells enter meiosis II, the goal is to separate such sister chromatids using the same microtubule-based network employed in other division processes. The result of meiosis II is two haploid cells, each containing...
Fertilization
During fertilization, an egg and sperm cell fuse to create a new diploid structure. In humans, the process occurs once the egg has been released from the ovary, and travels into the fallopian tubes. The process requires several key steps: 1) sperm present in the genital tract must locate the egg; 2) once there, sperm need to release enzymes to help them burrow through the protective zona pellucida of the egg; and 3) the membranes of a single sperm cell and egg must fuse, with the sperm...


