在MCM8中发生的一种新型同卵性框架转移突变会在两种性别中引起原发性淋巴腺失调
Jie Dong1, Zhichuan Zou1,2, Wenhua Wang3
1Department of Reproductive Medicine, Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, 210002, Jiangsu, China.
Journal of assisted reproduction and genetics
|March 11, 2025
概括
在患有原发性淋巴腺失生症的兄弟姐妹中发现了MCM8基因的新奇突变,导致不孕. 这一发现凸显了MCM8的重要性.
科学领域:
- 遗传学和基因组学 遗传学和基因组学
- 生殖生物学 生殖生物学
- 人类分子遗传学 人类分子遗传学
背景情况:
- 原发性淋巴腺失生影响生殖发育,导致男性非阻塞性精症 (NOA) 和女性原发性卵巢缺陷 (POI) 等疾病.
- 血缘亲属家庭有更高的风险发生自体逆向遗传疾病.
- 了解性腺失调的遗传基础对于诊断和遗传咨询至关重要.
研究的目的:
- 在血缘家族中识别导致原发性淋巴腺失调的遗传因素.
- 研究MCM8在人类淋巴腺发育和不孕症中的作用.
主要方法:
- 在受影响的男性试验体的DNA上进行了全外体序列和生物信息学分析.
- 桑格测序被用来验证家族谱系内的突变.
- 进行了免疫组织化学和西部斑分析,以评估丸组织和细胞系中确定的突变的功能影响.
主要成果:
- 在两个受影响的兄弟姐妹中,在MCM8基因中发现了一种新的同卵性框架转移突变 (c.998delG,p.Gly333Glufs*50).
- 这名男性兄弟患有塞尔托利单细胞综合征 (SCOS).
- 功能性研究证实,这种突变导致截断的MCM8蛋白和蛋白质表达的减少.
结论:
- 一种新型的同卵性MCM8突变导致原发性淋巴腺失生,导致男性非阻塞性精子和女性原发性卵巢缺陷.
- 这项研究阐明了MCM8在人类淋巴腺发育中的关键作用.
- 这些发现扩大了已知的MCM8突变谱,并为不育家庭的遗传咨询提供了分子标记.
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