在青春期发作的肌肉病变中占主导地位的止损HNRNPA1变体
Johnnie Turner1, Christine C Bruels1, Audrey L Daugherty1
1Greg Marzolf Jr. Muscular Dystrophy Center and Department of Neurology, University of Minnesota Medical School, Minneapolis, Minnesota, USA.
Muscle & nerve
|July 29, 2024
概括
两个患有青少年发病肌肉病变的个体被发现在HNRNPA1基因中具有致病性止损变异. 这些发现扩大了已知的HNRNPA1相关神经肌肉疾病的范围.
科学领域:
- 遗传学 遗传学 是一个
- 神经肌肉疾病 神经肌肉疾病
- 分子生物学分子生物学
背景情况:
- HNRNPA1基因对核酸恒温至关重要,并与各种神经肌肉疾病有关.
- 之前的研究将HNRNPA1基因变异与肌缩性侧面硬化症类似的表型,远端遗传性运动神经病变,多系统蛋白质病变和肌肉病变联系在一起.
研究的目的:
- 为了研究两个不相关的个体中未解决的青少年发作的肌肉病的遗传基础.
- 描述与新型HNRNPA1变异相关的临床表现和遗传发现.
主要方法:
- 从两个患有青少年发作的肌肉病变的个体收集表型数据.
- 整体外体测序 (WES) 用于识别遗传变异.
- 对HNRNPA1基因变异的分析,包括它们对蛋白质功能的预测影响.
主要成果:
- 两个人都在青春期早期表现出缓慢渐进的四肢和面部软弱.
- 在HNRNPA1 (c.1119A>C p.*373Tyrext*6和c.1118A>C p.*373Serext*6) 中确定了单基因止损变异,影响相同的编码子.
- 临床特征包括肌酸激酶 (CK) 水平升高,心肌病,呼吸系统功能障碍以及特定的肌肉活检结果.
结论:
- 在HNRNPA1中发现的停止损失变异可能是致病的,有助于青少年发病肌病.
- 这些发现扩大了与HNRNPA1相关的神经肌肉疾病的基因型和表型谱.
- 在未解决的偶发性或主导性青少年发作的肌肉病变病例的临床诊断评估中应考虑HNRNPA1.
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