新的CCDC188变体会导致阿克法尔精子综合征,并导致细胞体内精子注射结果不佳
Xiaoyu Yang1, Yu Wang2,3,4,5,6,7, Kexin Yu2,3,4,5,6,7
1State Key Laboratory of Reproductive Medicine and Offspring Health, Clinical Center of Reproductive Medicine, the First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, China.
Journal of assisted reproduction and genetics
|September 26, 2025
概括
新的CCDC188基因变异在患有阿克菲拉性精子症候群 (ASS) 的男性中被发现. 这些遗传变化可能会影响精子发育,受精和早期胚胎发育,影响细胞内质精子注射 (ICSI) 的结果.
科学领域:
- 人类遗传学 人类遗传学
- 生殖生物学 生殖生物学
- 分子生物学分子生物学
背景情况:
- 脑细胞精子综合征 (Acephalic spermatozoa syndrome,简称ASS) 是一种罕见的男性不育症候群,其特点是精子没有头部或头部很小.
- 目前尚不完全了解ASS的遗传基础,因此需要进一步研究致病基因及其机制.
研究的目的:
- 在被诊断为ASS的患者中识别CCDC188基因中的新型变异.
- 调查这些CCDC188变体对细胞内质精子注射 (ICSI) 成功的潜在影响.
主要方法:
- 整体外基因组测序 (WES) 和桑格测序用于识别16名ASS患者的遗传变异.
- 精子形态被分析使用血素和素 (H&E) 染色和传输电子显微镜 (TEM).
- 在,体外和体内方法包括WB,RT-PCR,qPCR和IF用于评估变异性致病性和蛋白质表达.
主要成果:
- 在两名与ASS无关的不育男性中发现了两种新的CCDC188变体 (c.481C>T和c.1022+1G>A).
- 患者的精子表现出典型的ASS表型,观察到CCDC188蛋白与SUN5和PMFBP1.1一起减少.
- 一例ICSI结果不佳的病例,包括受精失败和胚胎发育异常,是在从一个患者的精子微注射后报告的.
结论:
- 鉴定出的变异扩大了与男性不孕症相关的CCDC188突变的已知谱.
- 这项研究提供了第一个证据,即CCDC188不仅在精子生成中发挥作用,而且可能在受精和早期胚胎发育中发挥作用,影响ICSI的成功.
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