在非阻塞性亚精精子症的男性中识别错误的DMC1变异
Noor Ullah1, Christopher Pombar2, Rachel Hvasta-Gloria2
1Department of Biochemistry, Institute of Basic Medical Sciences, Khyber Medical University, Peshawar, Pakistan.
Journal of assisted reproduction and genetics
|August 15, 2025
概括
这项研究在男性非阻塞性精子缺血症 (NOA) 的男性中发现了罕见的DMC1基因变异,这是男性不孕症的严重形式. 这些发现表明了递归遗传模式和新型表型,扩大了对男性不孕症遗传原因的理解.
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:
- 男性不孕症会影响生殖能力,非阻塞性精症 (NOA) 是最严重的形式,原因是精子生成受损.
- 影响精子发育的遗传变异与精子生成失败 (SPGF) 有关.
- 介质性特异性DMC1 (DNA介质性复合酶1) 基因对精子发育至关重要.
研究的目的:
- 调查与男性不孕症相关的DMC1基因中的遗传变异.
- 为了确定非阻塞性亚精子症 (NOA) 的遗传候选人.
- 为了加强DMC1变异的基因型-表型关系.
主要方法:
- 采用了整体外基因组测序 (WES).
- 使用in silico分析来研究DMC1变异.
- 分析了3150名不育患者 (零星和家族病例) 的大量队列.
主要成果:
- 在两个患有NOA.的兄弟身上,发现了一个同卵性DMC1误解变异 (p.Thr55Ile).
- 在零星患者中发现了额外的同卵性误解变异 (p.Thr164Ala,p.Tyr194Cys) 和罕见的异卵性变异 (p.Asp160Gly).
- 3D蛋白质建模表明,鉴定出的变异对DMC1蛋白质结构和功能有显著影响.
结论:
- 在人类NOA患者中发现了三种罕见的,衰退的DMC1变异.
- 在DMC1相关的NOA中观察到一种替代的成熟停止表型.
- 初步证据支持探索异合体DMC1变体,可能扩大对男性不育遗传学的理解.
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