在LDLR的5'UTR中出现的新型起始码子变异与家族性高胆固醇血症相关
Martin Bird1, Chris Jyun-Peng Tung2, Alan M Pittman3
1Cardiovascular and Genomics Research Institute, School of Health & Medical Sciences, City St George's, University of London, London, UK. mbird@sgul.ac.uk.
European journal of human genetics : EJHG
|July 24, 2025
概括
家族性高胆固醇血症 (FH) 是一种遗传性疾病. 一种新型的LDLR5'UTR变异通过过早启动翻译导致FH,突出显示了扩大遗传查的必要性.
科学领域:
- 遗传学 遗传学 是一个
- 分子生物学分子生物学
- 心血管疾病 心血管疾病
背景情况:
- 家族性高胆固醇血症 (FH) 是一种与LDLR,APOB和PCSK9基因变异相关的遗传疾病.
- 它显著增加了早期冠状动脉心脏病的风险,由于高的LDL-C.
- 目前的基因查主要集中在编码区域.
研究的目的:
- 识别导致FH的新型遗传变异.
- 为了研究LDLR 5 UTRs中新发现的变异的功能影响.
- 评估5个UTRs在FH病变发生中的作用.
主要方法:
- 来自536名FH患者的全基因组测序数据使用VEP插件UTRannotator进行了分析.
- 记者测试 (促销器和表位) 用于研究变异函数.
- 在LDLR 5 UTR中对新型c.-35C>G变体和先前报告的c.-22del变体的功能性表征.
主要成果:
- 在FH患者的LDLR 5 UTR中发现了一种新型变异c.-35C>G.
- 这种变体引入了一个上游开放的读取框架 (uORF),它与LDLR编码序列脱而出.
- 记者分析证实,c.-35C>G变异导致上游AUG编码子的优先使用,导致过早的翻译启动和蛋白质截断,类似于c.-22del变异.
结论:
- 在5 UTR中发现了一种新型的导致FH的LDLR变异类别.
- 这些变异导致过早的翻译启动和蛋白质截断.
- 扩大编码区域以外的基因查对于全面的FH诊断至关重要.
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