与IARS1相关疾病的非典型表现:扩大表型和基因型
Parith Wongkittichote1,2, Kira E Jonatzke3, Benjamin T Hyde3
1Department of Pediatrics, Division of Genetics and Genomic Medicine Washington University School of Medicine St. Louis Missouri USA.
JIMD reports
|May 14, 2025
概括
在IARS1的遗传变异导致增长迟缓,智力障碍和肝脏问题 (GRIDHH). 这项研究确定了IARS1变异的新患者,扩大了疾病.
科学领域:
- 遗传学和分子生物学
- 生物化学 生物化学
- 临床医学 临床医学
背景情况:
- 氨基酸-tRNA合成酶 (ARS) 对于蛋白质合成至关重要.
- 包括IARS1在内的ARS缺陷与遗传性疾病有关.
- IARS1变种会导致自体逆性增长迟缓,智力发育受损,低血压和肝病变 (GRIDHH).
研究的目的:
- 为了描述一个具有IARS1变异的新型患者.
- 扩大IARS1相关疾病的已知分子和临床谱.
- 使用酵母模型研究已识别的IARS1变异的功能影响.
主要方法:
- 整体外基因组测序以识别遗传变异.
- 在面包酵母模型中的功能分析,以评估变体的致病性.
- 临床评估和治疗用异黄素补充剂.
主要成果:
- 一名患者被确定为两种新型IARS1变异的复合异构:c.1193dupC;p.(Cys400LeufsTer32) 和c.746A>G;p.(Asp249Gly).
- 功能性研究证实p.Asp249Gly变种导致功能丧失.
- 患者出现肝衰竭,神经认知延迟和慢性骨髓炎; 胰岛素补充剂显示主观改善.
结论:
- 这项研究扩展了与IARS1变体相关的分子和临床表型,包括免疫失调.
- 酵母模型系统对于IARS1变异的功能评估是有效的.
- 需要进一步的研究来验证这些发现,并评估对GRIDHH的异黄素补充疗效.
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