鉴定了MND1的误解变体在中介性停产和非阻塞性亚子精子症中
Jingpeng Zhao1,2, Zhiyong Ji3, Guiquan Meng4
1State Key Laboratory of Reproductive Medicine, Nanjing Medical University, Nanjing, 211100, China.
Journal of human genetics
|June 26, 2023
概括
在MND1基因中,一种罕见的变异会导致介质性停止,导致男性的非阻塞性精子缺血 (NOA). 这一发现为男性不孕症和介质重组提供了新的遗传洞察力.
科学领域:
- 遗传学 遗传学是一种遗传学.
- 生殖生物学 生殖生物学
- 分子生物学分子生物学
背景情况:
- 精子停止是非阻塞性精子缺血症 (NOA) 的常见原因.
- 在NOA中中介性停止的遗传基础在很大程度上仍未被探索.
- MND1对于介质性重组至关重要,但其在男性介质变异和NOA中的作用尚不清楚.
研究的目的:
- 为了调查非阻塞性亚精子症 (NOA) 中介质性停止的遗传原因.
- 识别与NOA相关的新型基因变异.
- 阐明已识别的变异对男性半月变异的功能影响.
主要方法:
- 两家中国家庭的基因分析NOA.
- 在MND1基因 (NM_032117:c.G507C:p.W169C) 中鉴定了一种同卵性误解变异.
- 丸活检的组织学和免疫组织化学分析.
- 在蛋白质结构变异对蛋白质结构影响的in silico建模.
主要成果:
- 在NOA患者中,在MND1基因中发现了一种罕见的同卵性误解变异 (c.G507C).
- 基因组学揭示了在预相I的基类阶段中介性停止和精子缺乏.
- 在分析表明,该变体可能会改变MND1-HOP2复杂结构.
结论:
- 鉴定到的MND1变种 (c.G507C) 很可能是导致介质性停产和非阻塞性精子 (NOA) 的原因.
- 这项研究扩展了NOA的已知遗传原因.
- 这些发现为男性半衰期同类重组机制提供了新的见解.
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