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遗传因素有助于GJB2相关听力障碍的表型变异
Yu-Ting Chiang1, Pei-Hsuan Lin2, Ming-Yu Lo3
1Graduate Institute of Medical Genomics and Proteomics, College of Medicine, National Taiwan University, Taipei, Taiwan; Graduate Institute of Clinical Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan.
The Journal of molecular diagnostics : JMD
|September 8, 2023
概括
在GJB2的遗传变异导致神经感官听力损伤 (SNHI). 这项研究发现,其他基因变异和CRYL1变异 (rs14236) 可能解释SNHI严重程度的广泛范围,即使在患有相同GJB2变异的患者中也是如此.
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:
- 衰退的GJB2变体是全球感觉神经听力障碍 (SNHI) 的主要遗传原因.
- 与GJB2相关的SNHI的表型变异性是显著的,即使在具有相同变异的个体中也是如此.
- 在亚洲人群中常见的GJB2 p.V37I变种通常会导致轻度至中度的SNHI,但重度至严重的SNHI发生在约10%的同胞卵体中.
研究的目的:
- 调查导致GJB2 p.V37I变种同卵性患者SNHI严重性广泛的遗传因素.
- 确定潜在的修饰基因或影响GJB2相关SNHI的表型的变异.
主要方法:
- 在63个具有极端SNHI表型的p.V37I同胞体中测序GJB2和其他聋基因的下一代测序.
- 病例控制关联分析比较严重到严重的SNHI患者,轻度至中度的SNHI患者和人口对照.
- 在GJB2.2上游的CRYL1 rs14236变体的基因型鉴定.
主要成果:
- 在五名患有严重至严重SNHI的患者中发现了其他聋症基因的其他致病变体.
- 与轻度至中度SNHI和人口对照组相比,CRYL1 rs14236变异在严重至严重SNHI组的频率更高.
- 这些发现表明,额外的致病变体和CRYL1 rs14236变体在改变SNHI严重性方面都有作用.
结论:
- 除了GJB2以外的基因中的致病变体有助于GJB2相关SNHI的表型变异.
- 这种CRYL1 rs14236变异可能会作为一种基因修饰剂,影响p.V37I同胞菌中SNHI的严重程度.
- 综合的基因组分析对于理解听力障碍中的基因型-表型相关性至关重要.
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