新型双性DNHD1变异与男性不孕症相关,具有严重的MMAF表型
Islam Uddin1,2, Iqra Zafar1,2, Cao-Ling Xu1,2
1Center for Reproduction and Genetics, Department of Obstetrics and Gynecology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230001, China.
Asian journal of andrology
|November 11, 2025
概括
精子鞭子 (MMAF) 的多重形态异常导致男性不孕. 这项研究在巴基斯坦一家家庭中发现了一种新型DNHD1基因变异,负责MMAF,揭示了精子结构缺陷,并扩大了对不孕症原因的理解.
科学领域:
- 遗传学 遗传学 是一个
- 生殖生物学 生殖生物学
- 分子生物学分子生物学
背景情况:
- 精子鞭子 (MMAF) 的多重形态异常是男性不孕症的主要原因,其特点是缺少或卷曲的鞭子等严重缺陷.
- 尽管已确定了基因,但许多男性不孕不育病例仍未被诊断出来,需要进一步研究新型遗传突变.
- 严重的精子缺陷 - - 精子缺陷 - - 显著影响生育能力,凸显了基因诊断的必要性.
研究的目的:
- 为了调查一个血缘亲属的巴基斯坦家庭中阿斯丁诺特拉托动物精子症的遗传基础.
- 为了确定新型基因突变,负责多个形态异常的精子鞭毛 (MMAF).
- 阐明将遗传变异与精子功能障碍和不孕不育联系起来的致病机制.
主要方法:
- 整体外体序列测序 (WES) 是对来自不育的巴基斯坦家庭的受影响个体进行的.
- 进行精液分析以评估精子参数,包括运动性和形态学.
- 使用先进的显微镜技术 (H&E染色,免疫光,TEM) 来检查精子的超结构.
主要成果:
- 在丁氨酸重链域1 (DNHD1) 基因中发现了新的同卵性变异 (c.A4457G; p.K1486R和c.C10624T; p.R3542*).
- 受影响的兄弟姐妹表现出严重的MMAF,低的渐进性运动性和异常的精子轴突结构,包括缺失的中央对和无组织的微管双体.
- 还观察到线粒体缺陷,导致精子功能受损和不孕.
结论:
- 在巴基斯坦人口中,DNHD1的一种新型双基无意义变异会导致MMAF和阿斯诺特动物精子症.
- 这一发现扩大了与男性不孕症相关的DNHD1变异的范围.
- 这项研究强调了基因调查在诊断和了解男性不孕症方面的重要性.
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