MYBPC3 c.2309-2A>G:在意大利多变性心肌病患者中探索创始人变异
Marco Fabiani1, Caterina Micolonghi1,2, Silvia Caroselli1
1Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy.
European journal of human genetics : EJHG
|May 31, 2025
概括
一种特定的MYBPC3基因变异 (c.2309-2 A>G) 被确定为意大利的创始基因突变,导致多变性心肌病 (HCM). 这种变种起源于481年前,在载体中显示出可变的透率和明显的临床影响.
科学领域:
- 遗传学 遗传学 是一个
- 心脏病学 心脏病学
- 人口遗传学 人口遗传学
背景情况:
- MYBPC3的致病变体是导致高伤心肌病 (HCM) 的主要原因,具有多样化的临床特征.
- 在特定的人群中观察到MYBPC3的创始变异,这有助于疾病的流行率.
- 在MYBPC3中的c.2309-2 A>G拼接变体被调查其潜在的创始人起源在意大利中部.
研究的目的:
- 确认意大利中部MYBPC3 c.2309-2 A>G变种的创始人身份.
- 评估这种变异的分子和临床影响.
- 为了将其表型与其他已知的MYBPC3创始突变进行比较.
主要方法:
- 使用短串联重复和标签-SNP的哈普类型重建.
- 变种起源的年龄估计.
- 受影响个体的临床表型和RNA分析.
- 与其他MYBPC3创始变体进行比较分析.
主要成果:
- 在5251名HCM患者中,c.2309-2 A>G变种在11.6%的MYBPC3变种携带者中被发现.
- 一个独特的5.2 Mb的单双原型与变体分离,表明一个共同的创始人.
- 该变种起源于大约481年前,可能在拉齐奥地区.
- 雄性比雌性更早出现,透率更高,严重程度更高.
- RNA分析证实,由于内部保留,MYBPC3的表达减少,这与哈普洛缺陷相一致.
- 现型表达,特别是左心室壁厚度,与其他MYBPC3创始变体有所不同.
结论:
- 确定MYBPC3 c.2309-2 A>G变异是一种意大利创始者突变.
- 这一发现加深了对HCM遗传学和区域创始人效应的理解.
- 强调有针对性的基因查和针对携带者进行个性化管理的重要性.
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