从预测的致病性FBN1变体在gnomAD队列中开发出一个更准确的马方综合征的人口频率
1Department of Medicine (Melbourne Health and Northern Health), Royal Melbourne Hospital, The University of Melbourne, Parkville, VIC, 3052, Australia.
Scientific reports
|March 19, 2025
概括
由Fibrillin 1 (FBN1) 基因变异引起的Marfan综合征比以前想象的更为常见,大约影响416个人中的1人. 意识对于早期诊断和相关心脏风险的管理至关重要,特别是在较轻的病例中.
科学领域:
- 遗传学和人类疾病
- 人口遗传学 人口遗传学
- 医学研究 医学研究
背景情况:
- 马凡综合征是一种自体主导性疾病,与Fibrillin 1 (FBN1) 基因突变有关.
- 它的特点是身材高大,骨异常,透镜脱,以及心血管并发症,如大动脉扩张.
- 以前的估计表明患病率在3000到5000分之一之间,但这项研究旨在改进这一数字.
研究的目的:
- 通过分析致病性FBN1变异来确定马方综合征的种群频率.
- 将不同族群的频率与现有数据库进行比较.
主要方法:
- 从gnomAD v2.1.1下载了FBN1变体,并使用ANNOVAR进行了注释.
- 基于预测的致病性零,结构和错误变异的计算人口频率.
- 结果与对照子集和变种进行了比较,这些变种在ClinVar和LOVD数据库中被归类为致病性/可能致病性.
主要成果:
- 在大约每416个个体中,确定了预测的致病性FBN1变体,比以前报告的频率高得多.
- 患病率因种族而异,在东亚人中患病率最高 (占243人中的1人),在阿什肯纳兹人中患病率最低 (占5185人中的1人).
- 基于ClinVar和LOVD的频率分别为718分之一和1014分之一;零变异影响了8624分之一.
结论:
- 马方综合征比以前认为的更为普遍,需要提高临床意识.
- 紧急诊所和心脏诊所应在差异诊断中考虑马凡综合征,特别是考虑到较轻微的表型.
- 这项研究强调了基因查对于准确评估马方综合征患病率的重要性.
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