来自第一极体核转移的人类胚胎在发育过程中表现出相对异常的形态动力学
Leila Heydari1, Mohammad Ali Khalili1, Azam Agha Rahimi1
1Research and Clinical Center for Infertility, Yazd Reproductive Science Institute, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.
Clinical and experimental reproductive medicine
|August 29, 2023
概括
极体基因组转移 (PB1NT) 在体外成熟的卵子细胞可以产生可行的胚胎,但显示受精减少和胚胎发育异常,限制了临床使用.
科学领域:
- 生殖生物学 生殖生物学
- 辅助生殖技术是一种辅助生殖技术.
- 遗传学 遗传学 是一个
背景情况:
- 极地体基因组转移 (PB1NT) 提供了一种潜在的方法来从卵细胞中获取遗传物质,特别是对于胚胎碎片化或晚年母亲年龄的患者.
- 目前的PB1NT技术需要进一步改进才能成功临床应用.
研究的目的:
- 评估PB1NT在体外成熟 (IVM) 卵细胞中的疗效和发育结果.
- 评估受精率,胚胎形态动力学和PB1NT和细胞内精子注射 (ICSI) 后的裂变模式.
主要方法:
- 85个IVM卵细胞被分为PB1NT (n=54) 和对照 (n=31) 组.
- PB1NT涉及卵细胞核化,第一极体 (PB1) 基因组转移和融合,随后进行ICSI.
- 监测胚胎发育,使用时间延迟成像来评估受精,动力学和裂变模式.
主要成果:
- 排卵细胞核和融合后的存活率为77.14%,PB融合率为92.59%.
- 与对照组 (92%) 相比,PB1NT组表现出明显较低的正常受精率 (56.41%).
- 在PB1NT组的胚胎中,在四细胞后的发育停滞增加,裂分裂异常 (93.3%),并降低了植入潜力和euploidy率.
结论:
- 在IVM卵细胞中的PB1NT可以在PB融合和ICSI后产生正常的卵胞.
- 然而,PB1NT与受精效率的降低和异常胚胎发育的更高发病率有关,这表明临床翻译的局限性.
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