非编码DNA变异增加了基因诊断产量在初级状腺失运动症
Lizi Briggs1, Cátia Brandão1, Andrew Fleming1
1Royal Brompton and Harefield Hospitals, Clinical Genetics and Genomics, London, England, United Kingdom of Great Britain and Northern Ireland.
American journal of respiratory and critical care medicine
|August 4, 2025
概括
调查非编码区域显著改善了原发性纤毛功能障碍 (PCD) 的遗传诊断. 端到端的基因测序可以识别标准检测中遗漏的致病变体,有助于诊断这种罕见的呼吸系统疾病.
科学领域:
- 遗传学 是一个遗传学.
- 呼吸系统医学 呼吸系统医学
- 分子生物学分子生物学
背景情况:
- 初级状动力障碍 (PCD) 是一种罕见的遗传呼吸系统疾病,影响运动.
- 目前的基因测试往往集中在编码区域,使许多患者没有完全的诊断.
- 已知超过50个基因中的致病变体会导致PCD.
研究的目的:
- 评估497名怀疑患有PCD的患者基因检测的诊断产量.
- 确定42名基因诊断不完整的患者的非编码DNA区域的诊断产量.
- 在PCD基因的非编码区域中识别新型致病变体.
主要方法:
- 对17个PCD基因进行了编码和非编码区域的端到端下一代测序.
- 在 silico 工具中使用,以预测内部变体的拼接效应.
- 使用从鼻上皮上的RNA确认预测的拼接效应.
主要成果:
- 常规基因检测在46.8%的患者中实现了完整的诊断.
- 17.3%的患者有不完整的遗传诊断.
- 端到端测序在38.1%的诊断不完整的患者中发现了新的致病性非编码变体,包括三种反复复发的深层内部变体.
结论:
- 端到端的基因测序提高了PCD的诊断产量.
- 影响拼接的非编码变异是PCD病原性变异的重要来源.
- 这项研究强调了全面基因或基因组测序用于PCD诊断的临床价值.
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