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一个年轻男性的大动脉剖析,患有持续的动脉通道和MYLK的新型变异
Maria Bejerholm Boelman1, Thomas van Overeem Hansen1,2, Matthias Nybro Smith1
1Department of Clinical Genetics, Rigshospitalet, Copenhagen, Denmark.
American journal of medical genetics. Part A
|November 3, 2023
概括
在MYLK基因的遗传变异会导致胸前大动脉动脉瘤和解剖 (TAAD),也可能导致持续的导管动脉 (PDA). 这项研究确定了与这两种疾病相关的新型MYLK变异,扩大了已知的疾病谱.
科学领域:
- 心血管遗传学 心血管遗传学
- 顺肌细胞生物学 顺肌细胞生物学
- 大动脉和先天性心脏病
背景情况:
- 调节光滑肌细胞 (SMC) 基因的致病变异与先天性心脏病和胸前动脉动脉瘤和解剖 (TAAD) 有关.
- MYLK基因变异主要与TAAD相关,但新出现的证据表明,在大动脉之外的SMC收缩中起着作用.
研究的目的:
- 报告一个同时发生的持续性动脉管 (PDA) 和胸前大动脉剖析的病例.
- 调查一家患有这些疾病的家庭中新型MYLK变异的遗传基础和分子机制.
主要方法:
- 基因分析以确定致病变体.
- 家庭中的隔离分析.
- 对患者纤维细胞的RNA分析,以确定已识别的变种的功能后果.
主要成果:
- 在MYLK基因中发现了一种新的拼接受体变异 (c.3986-1G>A),并与家族中的疾病分离.
- RNA分析显示,该变体导致24个表质子跳转,导致101个氨基酸的内部删除.
- 这些发现表明,MYLK相关的疾病可能包括更广泛的范围,包括PDA和阻塞性肺病.
结论:
- 与MYLK相关的心血管疾病可能表现出比以前识别的更广泛的表型,包括PDA.
- 在有TAAD,PDA或阻塞性肺病史的家庭中,应考虑对MYLK变异进行基因检测.
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