在救援-IVM和半自动化玻璃化后分析成熟动态和卵细胞核质量
L Chaput1,2, S Dollet2, E Eymard-Pierre3,4
1Assistance Médicale À La Procréation, CECOS, CHU Estaing, Clermont-Ferrand, France.
Human reproduction (Oxford, England)
|May 15, 2025
概括
在成熟阶段使用半自动或手动玻璃化进行救援体外成熟 (r-IVM) 后冷保存人类卵细胞,以成功保存生育能力. 这确保了卵细胞的安全性和未来使用的核质量.
科学领域:
- 生殖生物学和冷保存技术.
- 卵细胞成熟和冷保存以保护生育能力.
背景情况:
- 拯救未成熟卵细胞的体外成熟 (r-IVM) 可以增加冷保存的卵细胞产量,以保持生育能力.
- 为了保持核质量,冷保存r-IVM卵细胞的最佳阶段和玻璃化方法尚不清楚.
研究的目的:
- 为了确定在r-IVM后对卵细胞冷保存的最佳阶段 (未成熟或成熟).
- 为了比较半自动化与手动化玻璃化技术对r-IVM卵细胞的效率和安全性.
主要方法:
- 一项前性研究涉及175名接受ICSI的患者,收集了414个不成熟的卵细胞.
- 卵子被分为以下几组:新鲜的体外成熟 (IVM),IVM随后进行半自动化玻璃化 (IVM+VITg),IVM随后进行手动化玻璃化 (IVM+VITm),IVM之前使用半自动化玻璃化 (VITg+IVM),IVM之前使用手动化玻璃化 (VITm+IVM).
- 评估了温暖后的存活率,r-IVM率,成熟动力学 (GVBD时间) 和核成熟质量 (螺旋体和染色体对齐,质率).
主要成果:
- 当半自动化玻璃化先于r-IVM (50%) 时,与其他组 (80-93%) 相比,温暖后的生存率明显较低.
- 在IVM速率,卵细胞核成熟率 (螺旋/染色体对齐) 或异位积分率之间没有观察到显著的差异.
- 延长生殖囊泡分解 (GVBD) 时间与r-IVM之前的半自动玻璃化有关,也与异常的螺旋形态和染色体不对齐相关.
结论:
- 人类卵细胞应在r-IVM后的成熟阶段 (r-MII) 用半自动或手动玻璃化进行冷保存.
- 半自动化玻璃化是安全和有效的,当进行 *后* r-IVM,提供标准化好处.
- 扩展GVBD时间可以作为评估卵细胞核质量的新型非侵入性标记.
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