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在PMFBP1中发生的一种新型同卵性突变与脑细胞精子缺陷有关

Cong Liu^1,2, Xinyue Yin², Gege Yin²

¹Center for Reproductive Medicine, Renmin Hospital of Wuhan University, Wuhan 430060, China.

|December 30, 2025

概括

一个新的PMFBP1突变导致了阿克法力精子症候群 (ASS),这是一个罕见的不孕症状况. 这种遗传缺陷会损害精子功能,并影响辅助生殖技术的结果.

科学领域:

生殖生物学生殖生物学
人类遗传学人类遗传学
精子动物超结构精子动物超结构

背景情况:

大脑精子综合征 (ASS) 是一种罕见的男性不孕症原因,与缺陷的精子头尾合有关.
已知的遗传突变仅解释了ASS病例的一小部分,因此需要进一步研究其病因.
了解遗传缺陷对于改善辅助生殖技术 (ART) 的结果至关重要.

研究的目的:

在ASS患者中确定一种新的PMFBP1突变.
研究突变对精子超结构和PMFBP1蛋白的影响.
使用受影响患者的精子评估ART结果.

主要方法:

整体外体测序 (WES) 和桑格测序用于遗传分析.
传输电子显微镜 (TEM) 用于精子超结构评估.
对于PMFBP1蛋白质分析的西部斑点和体外稳定性试验.
在体外受精 (IVF) 结果与患者与捐赠精子的比较.

主要成果:

在PMFBP1中发现了一种新的无意义突变 (c.2641C>T),导致过早停止密码和截断蛋白质.
这种突变导致了完整的精子头尾脱落,体异常和头结损伤.
患者的精子在试管婴儿中未能达到正常受精 (2-pronuclei形成),与捐赠精子不同.
在患者的精子中观察到功能PMFBP1蛋白质的缺失和蛋白质稳定性的改变.

结论:

PMFBP1 c.2641C>T突变是ASS的新病因,损害了精子的头尾粘附.
这一发现扩大了与PMFBP1.1相关的男性不孕症已知的遗传原因.
这项研究为ASS的遗传诊断和PMFBP1相关不孕症的潜在治疗目标提供了洞察力.

关键词:

这就是PMFBP1的原因.接受性精子细胞综合征辅助生殖技术是一种辅助生殖技术.男人的不孕不育症.

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