在两个患有JAG2关联四肢腰带肌肉发育不良症的家族中,出现了三种新的误解变异
Lein Dofash1, Krishnan Lyengar2, Nolette Pereira3
1Harry Perkins Institute of Medical Research, Centre for Medical Research, University of Western Australia, Nedlands WA, Australia.
Neuromuscular disorders : NMD
|August 9, 2024
概括
肢体带肌肉衰竭27型与JAG2基因变异有关. 在澳大利亚家庭中发现了新型变异,呈现出童年开始的肌肉衰弱和明显的MRI和转录组发现.
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:
- 肢体腰带肌肉衰退27 (LGMD27) 是一种罕见的遗传疾病.
- 它与JAG2基因中的双变异相关,该基因编码了JAG2接体.
- 之前的报道描述了多个家庭中的24名受影响的个体.
研究的目的:
- 报告澳大利亚家庭的新型JAG2变体与LGMD27.
- 描述这些患者的临床,成像和分子特征.
- 在缺乏功能性分析的情况下,探索潜在的诊断方法.
主要方法:
- 基因测序用于识别JAG2变种.
- 临床检查和患者病史.
- 肌肉的磁共振成像 (MRI).肌肉的磁共振成像 (MRI).
- 肌肉RNA测序以分析基因表达.
主要成果:
- 确定了三个新的JAG2误解变体:同性 (p.(Gly341Cys)) 和复合异性 (p.(Trp235Arg); p.(Arg784Cys)).
- 受影响的个体呈现出童年开始的四肢腰带状肌肉病,行走困难,以及MRI上广泛的肌肉参与.
- 肌肉病理学显示脂肪透带来的肌病变化,RNA测序揭示了关键肌发生基因 (PAX7,MYF5,MEGF10) 的下调.
结论:
- 临床,MRI和转录基因数据共同有助于诊断JAG2相关的肌肉发育不良.
- 准确的诊断对于患者管理和理解复发风险至关重要.
- 进一步的研究可能涉及功能性研究,以阐明JAG2变种的致病性.
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