低频母乳新型MYH7马赛克基因突变在复发的胎儿发作严重的左心室非紧缩:一个病例报告
Hiroshi Kawamura1, Masamichi Ikawa2, Keiichi Hirono3
1Department of Obstetrics and Gynecology, University of Fukui, Fukui, Japan.
Frontiers in pediatrics
|June 26, 2023
概括
母体低频体质马赛克的肌重链7 (MYH7) 突变导致严重的胎儿发病的左心室非紧缩 (LVNC). 在基因查中,下一代测序 (NGS) 对于区分马赛克突变与新突变至关重要.
科学领域:
- 心脏病学 心脏病学
- 遗传学 是一个遗传学.
- 周围生理学 周围生理学
背景情况:
- 左心室非紧缩 (LVNC) 是一种罕见的遗传性心肌病,具有不同的临床表现.
- 在胎儿发病的LVNC中,基因型-表型相关性仍然不完全理解.
- 这项研究解决了严重的胎儿发病LVNC的新型遗传原因.
研究的目的:
- 报告第一个严重的胎儿发病的LVNC病例,该病例归因于母亲的低频体质马赛克.
- 在一个家庭中调查重复严重LVNC的遗传基础.
- 突出先进的基因测序技术在诊断复杂的遗传性心脏病的有用性.
主要方法:
- 一个怀孕妇女的病例介绍,患有复发的胎儿水. fetalis.
- 下一代测序 (NGS) 用于对与心脏疾病相关的基因进行基因查.
- 通过NGS进行有针对性和深度测序,以分析母亲和父亲的DNA.
主要成果:
- 鉴定出一种新型异质合体误解MYH7变体 (c.2729A>T,p.Lys910Ile) 是LVNC的原因.
- MYH7变体存在于母性等位基因部分的6%,表明低频率的体质马赛克主义.
- 这种变异在父亲的DNA中没有被检测到,也没有通过传统的桑格测序在父母中检测到.
结论:
- 一种MYH7突变的母体低频体质马赛克主义可能导致严重的胎儿发病的LVNC.
- 基于NGS的父母向和深度测序对于区分遗传马赛克突变和de novo突变至关重要.
- 这一发现扩大了对LVNC背后遗传机制的理解,并为遗传咨询提供了信息.
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