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Updated: Jan 6, 2026

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In Vivo Modeling of the Morbid Human Genome using Danio rerio
Published on: August 24, 2013
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新型DNAH17拼接位突变缩短AAA6域导致MMAF的精
Leilei Feng1,2, Feng Wan1,2, Chenchen Cui1,2,3
1Reproductive Medicine Center, Zhengzhou University People's Hospital, Zhengzhou, 450003, China.
Reproductive sciences (Thousand Oaks, Calif.)
|November 19, 2025
概括
DNAH17基因中的新型拼接位变异通过影响精子健康导致男性不孕. 这一发现凸显了分析结合部位对于诊断精子和精子鞭子 (MMAF) 多重形态异常的重要性.
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:
- 男性不孕症影响了试图怀孕的夫妇的很大一部分.
- 遗传因素在男性生殖健康中起着至关重要的作用,包括精子的生产和功能.
- DNAH17中的突变与男性不孕症有关,但病原性机制的全谱仍然不完全理解.
研究的目的:
- 为了研究DNAH17基因中新型拼接位变异的致病性.
- 分析这些变异对精子形态和运动性的影响.
- 阐明DNAH17相关的男性不孕症背后的分子机制.
主要方法:
- 整体外体测序 (WES) 和桑格测序用于识别和验证DNAH17变异.
- 生物信息学工具 (varSEAK,MobiDetails,MaxEntScan,SpliceAI) 预测了拼接缺陷的情况.
- 在HEK293T细胞中使用小基因拼接试验进行了功能验证.
- 使用AlphaFold3进行突变蛋白质的结构建模,并使用PyMOL进行可视化.
主要成果:
- 在DNAH17中发现了两个新的拼接位变异 (c.11677+5G>T和c.11677+5G>A) 在一个患有精子和多个形态异常的精子鞭子 (MMAF) 的患者中.
- 计算预测表明,正规的供体结合部位发生了显著的破坏.
- 迷你基因测试证实了exon 72跳转,导致移突变和AAA6域的截断.
- 鉴定的变异导致精子形态和运动异常.
结论:
- 在DNAH17中的拼接位变异,特别是那些破坏AAA6域的变异,代表了男性不孕症的新型致病机制.
- 这些发现扩大了已知的DNAH17相关男性不孕症突变谱.
- 将拼接部位分析集成到遗传诊断中,对于准确诊断男性不孕症至关重要,包括精和MMAF病例.
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