在不孕男性中,基因型特异性差异是由于M1AP或ZZS基因的功能丧失变异导致的
Nadja Rotte1, Jessica E M Dunleavy2, Michelle D Runkel1
1Centre of Medical Genetics, Institute of Reproductive Genetics, University of Münster, 48149, Münster, Germany.
EMBO molecular medicine
|May 15, 2025
概括
男人不孕症可能源于二次分裂中的重组失败. 这项研究将M1AP和ZZS蛋白质缺乏与不同的介质性停产联系起来,为男性不孕症的原因提供了新的见解.
科学领域:
- 遗传学 是一个遗传学.
- 生殖生物学 生殖生物学
- 分子生物学分子生物学
背景情况:
- 男性不孕症是一个重大的问题,遗传因素起着至关重要的作用.
- 精子重组对于精子生产过程中适当的染色体分离至关重要.
- 在小鼠中,M1AP和ZZS蛋白质参与了小鼠中变过程中的DNA交叉形成.
研究的目的:
- 研究M1AP和ZZS蛋白在人类男性不孕症中的作用.
- 为了确定M1AP和ZZS基因中的功能丧失变异是否会由于重组失败导致不孕.
- 描述与M1AP或ZZS缺陷相关的特定介质缺陷.
主要方法:
- 在不育男性的M1AP和ZZS基因中查双性/半性功能丧失 (LoF) 变异 (N=24).
- 鉴定出LoF变异的男性丸表型的深入表征.
- 介质进展和再组合中间体的分析.
主要成果:
- 缺少ZZS导致了早期的介质停止,不正确的同源染色体突触和未修复的DNA双链断裂.
- M1AP缺陷导致了主要的甲相I停止,减少了重组中间体和I类交叉.
- 医疗辅助生殖使一个患有M1AP LoF变种的男性能够健康分娩.
结论:
- 在人类中,M1AP和ZZS蛋白对于成功的介质重组至关重要.
- 这些蛋白质的缺陷导致明显的介质衰竭和男性不孕症.
- M1AP是一个重要的,虽然非必不可少的,增强介质重组的增强剂,通过辅助生殖成为父亲是可能的.
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