以表型为驱动的再分析揭示了40个外体阴性家族的5种新型致病变体,这些家族患有夏科特-玛丽-牙病
Zhiqiang Lin1,2, Lei Liu1,3, Xiaobo Li1
1Department of Neurology, The Third Xiangya Hospital, Central South University, Changsha, 410013, China.
Journal of neurology
|September 30, 2023
概括
这项研究在Charcot-Marie-Tooth (CMT) 家族中发现了新的遗传变异,这些变异先前对整个外基因组测序 (WES) 有负面影响. 由表型驱动的再分析显著增加了这些罕见的神经疾病的诊断产量.
科学领域:
- 遗传学 是一个遗传学.
- 神经学 神经学
- 分子生物学分子生物学
背景情况:
- 查洛-玛丽-牙 (CMT) 是一组遗传的外围神经病变.
- 整体外体测序 (WES) 在CMT中具有高达70%的诊断产量,但很大一部分仍未被诊断出来.
- 在WES阴性家族中确定遗传原因对于了解疾病机制和改善诊断至关重要.
研究的目的:
- 确定40个Charcot-Marie-Tooth (CMT) 家庭的遗传原因,这些家庭在初始整体外基因组测序 (WES) 后呈阴性.
- 通过重新分析诊断的患者的临床和遗传特征的特征.
- 评估表型驱动的再分析在增加WES阴性CMT病例的诊断产量的有效性.
主要方法:
- 收集了40个WES阴性CMT家族的临床和测序数据.
- 使用Exomiser软件进行了表型驱动的再分析.
- 在未被诊断的情况下,选了BAM文件以查看连续删除和误解变体.
主要成果:
- 在4个家庭中实现了分子诊断,整体诊断率增加了3.0%.
- 在POLR3B,PRX,INF2和SLC25A46中确定了新的致病变体,扩大了已知的基因型-表型相关性.
- 报告了五种新的致病变体,其中四种是全球首次报告.
结论:
- 由表型驱动的再分析是诊断WES阴性Charcot-Marie-Tooth (CMT) 患者的有效策略.
- 长期跟踪和对测序数据的全面分析,包括BAM文件,对于最大限度地提高诊断产量至关重要.
- 鉴定出的新型变异扩大了CMT的遗传和表型谱,有助于未来的诊断和研究.
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