ERBB2 c.1795C>T,p.Arg599Cys变体与人类的左心室外流通道阻塞缺陷有关
Minna Ampuja1, Sabina Ericsson1, Ilkka Paatero2
1Stem Cells and Metabolism Research Program, Faculty of Medicine, University of Helsinki, Helsinki, Finland.
HGG advances
|May 7, 2025
概括
一种罕见的ERBB2基因变异 (c.1795C>T,p.Arg599Cys) 与家族性先天性心脏缺陷 (CHD) 有关,特别是左心室外流通道阻塞. 这种变异导致ERBB2的错位化,导致斑马鱼和人类细胞的心脏异常,表明ERBB2的存在.
科学领域:
- 遗传学和分子生物学
- 心血管研究研究心血管研究
- 发展生物学 发展生物学
背景情况:
- 非综合征性先天性心脏缺陷 (CHDs) 可能是家族性,左心室外流通道阻塞 (LVOTO) 缺陷显示高遗传性.
- 调查遗传变异对于理解心血管疾病病因至关重要.
研究的目的:
- 为了评估LVOTO缺陷家族中发现的异构体ERBB2变体 (c.1795C>T,p.Arg599Cys) 的致病性.
- 阐明这种ERBB2变体在细胞和生物水平上的功能后果.
主要方法:
- 用于变种检测的exome测序.
- 试验室功能测定包括西方涂抹,数字PCR,质谱和流细胞计.
- 斑马鱼胚胎模型和人类诱导的多能干细胞衍生心肌细胞 (hiPS-CMs) 和内皮细胞 (hiPS-ECs) 用于功能和转录组分析.
主要成果:
- 这种ERBB2 c.1795C>T变异导致ERBB2受体从血到内分泌网膜的错位.
- 斑马鱼胚胎中ERBB2变体的表达导致心脏缩,壁壁厚度增加和功能受损.
- 对人类细胞的转录组分析揭示了与心血管发育和氧化应激反应相关的异常基因表达.
结论:
- 异合体的ERBB2 c.1795C>T,p.Arg599Cys变体破坏了ERBB2的局部化,并诱导心脏结构和功能异常.
- 这些在人体细胞和斑马鱼模型中的发现表明,ERBB2变异可能有助于先天性心脏缺陷的发病.
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