复发性E-Cadherin (CDH1) 突变c.760G>A会导致面腔裂,但不会导致遗传性癌症
Lea Gossner1, Dietmar Rieder2, Thomas Müller1
1Department of Pediatrics I, Medical University of Innsbruck, 6020 Innsbruck, Austria.
Genes
|November 27, 2024
概括
复发的CDH1 c.760G>A突变强烈地使个体易患口腔裂 (CL/P),特别是男性. 这种特定突变似乎不会增加遗传性扩散性胃癌 (HDGC) 的风险.
科学领域:
- 遗传学和基因组学 遗传学和基因组学
- 发展生物学 发展生物学
- 医学遗传学 医学遗传学
背景情况:
- 耳面裂 (CL/P) 很少是由单个基因突变引起的.
- 致病性CDH1生殖系变异已与非综合征性CL/P和白牙综合征有关.
- CDH1编码E-cadherin;许多致病变体与遗传性扩散性胃癌 (HDGC) 有关.
研究的目的:
- 为了分类与CDH1c.760G>A (p.Asp254Asn) 突变相关的表型.
- 调查CL/P家族中CDH1变异的基因型-表型相关性.
主要方法:
- 在一个患有CL/P的家庭中,使用了exome和Sanger测序.
- 使用ClinVar,PubMed和MEDLINE数据库进行了致病性CDH1变异的全面审查.
- 对CDH1 c.760G>受影响家族内的A变体进行分离分析.
主要成果:
- 鉴定了CDH1 c.760G>A变异,并将其与双边CL/P分离在一个家族中.
- 这种复发型变异之前在6个家庭的21个人中报告过,主要影响男性 (16/16男性vs.5/11女性).
- 在异合体个体中没有报告胃肠道瘤,这表明HDGC的风险没有增加.
结论:
- CDH1 c.760G>A突变为CL/P带来高风险,男性占主导地位显著.
- 有证据表明,这种特定变异不会增加遗传性扩散性胃癌 (HDGC) 的风险.
- 在CDH1突变载体中区分面表型与癌症风险对于精准医学和遗传咨询至关重要.
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