通过全外体测序对128名患有神经发育障碍的中国人进行基因鉴定
Yayun Qin1, Huang Cao1, Lijun Liu1
1Medical Genetics Center, Maternal and Child Health Hospital of Hubei Province, Wuhan, China.
Developmental neuroscience
|October 24, 2025
概括
双维全外体序列测序 (WES) 通过结合单核酸变异和副本数变异分析,显著改善神经发育障碍 (NDD) 诊断. 这种方法增强了对遗传异质性的理解,并有助于准确治疗NDD的策略.
科学领域:
- 遗传学 遗传学 是一个
- 神经科学是一个神经科学.
- 医学诊断 医学诊断 医学诊断
背景情况:
- 神经发育障碍 (NDD) 是复杂的慢性疾病,具有显著的临床异质性,使得早期诊断具有挑战性.
- 遗传因素是NDD病因的主要驱动因素,需要先进的诊断工具.
- 了解基因型-表型相关性对于有效管理NDD至关重要.
研究的目的:
- 评估在中国NDD患者中双维全外因组测序 (WES) 的诊断实用性.
- 增强对NDD中基因型-表型相关性的理解.
- 评估单核酸变体 (SNV) /Indel和副本数变体 (CNV) 分析的联合诊断能力.
主要方法:
- 来自128名中国NDD患者的WES数据的回顾性分析.
- 在WES中包括SNV/Indel和CNV分析.
- 路径丰富,组织表达分析,以及用于变异解释的功能实验.
主要成果:
- 总体诊断率为35.9% (46/128),使用双维WES.
- 与单独的SNV/Indel分析相比,双维分析显著改善了诊断产量 (35.9%对21.9%).
- 在多系统异常 (63.2%) 的患者中观察到更高的诊断率.
- 识别de novo和新型变异,包括ASXL3,SHANK3和EHMT1.1中复发的致病变异.
- 功能性实验证实了NLGN3 c.562G>A (p.G188R) 变种的致病性.
结论:
- 将CNV分析集成到WES工作流中,可以更好地澄清NDDs的遗传异质性.
- 这种方法扩大了可识别的基因变异的谱.
- 提供了NDD预后评估和精确诊断和治疗的基础.
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