线粒体疾病基因的变异是遗传性外围神经病变的常见原因
Tomas Ferreira1, Kiran Polavarapu2, Catarina Olimpio1,3
1Department of Clinical Neurosciences, John Van Geest Centre for Brain Repair, School of Clinical Medicine, University of Cambridge, Robinson Way, Cambridge, CB2 0PY, UK.
Journal of neurology
|March 29, 2024
概括
线粒体基因中的遗传变异经常导致遗传性外围神经病变,包括夏科特-玛丽-图斯病. 整体外体或基因组测序可以改善对这些复杂遗传疾病的诊断.
科学领域:
- 遗传学 是一个遗传学.
- 神经学 神经学
- 线粒体生物学 线粒体生物学
背景情况:
- 线粒体疾病中的外围神经病变源于核或线粒体DNA的突变.
- 整体外基因组/基因组测序已经推进了遗传诊断,但约40%的Charcot-Marie-Tooth病例仍未被诊断出来.
研究的目的:
- 研究遗传性外围神经病变的遗传基础,特别是与线粒体功能障碍相关的基因.
- 在未被诊断的外围神经病变患者中识别新的致病性遗传变异.
主要方法:
- 利用基因组-现象分析平台 (GPAP) 创建了一组2087名患有神经病相关的人类表现型本体学 (HPO) 术语的患者队列.
- 分析了10,935名患者的遗传数据,寻找已知的线粒体疾病基因的变异.
主要成果:
- 确定了1379种罕见变异,在36个家庭的42名患者中发现了44种致病性/可能致病性变异.
- GDAP1和GARS1是自体主导神经病变最常见的基因;各种核和线粒体DNA变异被确定为线粒体CMT的致病因素.
- 之前,只有50%的鉴定变异在GPAP中被报告为已解决.
结论:
- 线粒体疾病基因的变异在患有遗传性外围神经病变的患者中很常见.
- 由于临床重叠,不可知异体/基因组测序提供了优越的诊断产量,与线粒体疾病和CMT的向基因面板相比.
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