整体外体序列测定确定了与非综合征性听力损失相关的MITF基因中一个无意义的致病变体
Farzad Soleimani1, Arash Pooladi1, Masoud Alasvand2
1Cellular and Molecular Research Center Research Institute for Health Development, Kurdistan University of Medical Sciences, Sanandaj, Iran.
Biochemical genetics
|November 27, 2025
概括
一项研究确定了一种致病性MITF基因变异 (c.1180C>T),导致库尔德家庭的非综合征性听力损失. 这种变种仅与听力损伤有关,在异合体和同合体个体中表现出类似的临床表现.
科学领域:
- 遗传学 是一个遗传学.
- 耳鼻喉科 耳鼻喉科 耳鼻喉科
- 分子生物学分子生物学
背景情况:
- 听力损失具有显著的遗传异质性,涉及100多个基因.
- 由于这种遗传多样性,非综合征性听力损失存在诊断挑战.
- 下一代测序,就像全外体测序 (WES),有助于识别导致聋的致病基因.
研究的目的:
- 使用WES在库尔德血缘家庭中找到非综合征性听力损失的遗传原因.
- 分析与确定的基因突变相关的临床特征.
主要方法:
- 在一个库尔德家庭的15名受影响和15名未受影响个体上进行整体外体测序 (WES).
- DNA提取,变体识别,注释和WES数据分析.
- 聚合酶链反应 (PCR) 和桑格测序用于其他家族的变异确认和分析.
主要成果:
- 在MITF基因中发现了一种致病性c.1180C>T变异,导致过早停止编码子 (p.Arg394Ter).
- 这种变异,与自体主导遗传相一致,在受影响个体的异合和同合状态中发现.
- 临床表现仅仅是听力损失,同卵性和异卵性载体之间没有显著差异.
结论:
- 在这个库尔德家庭中,c.1180C>T MITF变种可能是导致非综合征性听力损失的原因.
- 现型表达似乎仅限于听力损失,不同于以前报告的瓦登堡综合征.
- 特定的人口因素可能会影响与这种MITF变异相关的表型.
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