RNA测序为以前未解决的罕见疾病病例提供了功能性见解和诊断解决方案
Robert G Lewis1,2, John M O'Shea1,2, Lucilla Pizzo1,2
1ARUP Laboratories, Salt Lake City, UT, 84108, USA.
BMC medical genomics
|November 14, 2025
概括
RNA测序 (RNA-seq) 通过检测DNA测序遗漏的拼接和调节缺陷来提高罕见遗传疾病的诊断. 这种功能分析有助于分类变异,并解决受影响个体的诊断.
科学领域:
- 基因组学就是基因组学.
- 分子生物学分子生物学
- 临床遗传学 临床遗传学
背景情况:
- 外基因组和基因组测序在诊断罕见遗传障碍方面受到限制,这是由于对非编码变异的挑战.
- RNA测序 (RNA-seq) 提供了对拼接和基因表达的功能性见解,补充了DNA测序的限制.
研究的目的:
- 通过检测拼接和调节缺陷来评估RNA测序在诊断罕见遗传疾病中的临床实用性.
- 评估RNA-seq在变体解释和分类中的作用,当DNA测序不确定时.
主要方法:
- 从犹他州的Penelope计划和未诊断疾病网络三年来对30例病例进行了回顾性审查.
- 在负DNA测序或候选变异功能评估后,在全血和/或纤维细胞上进行RNA测序.
- 分析包括检测出外子跳转,密码拼接位点激活,内子保留和X-无活化模式.
主要成果:
- RNA-seq确定了转录水平的变化,包括前子跳转,密码拼接位点激活和内子保留.
- 定性丰富分析澄清了X-无活化和剂量效应,证实了副本数变异的致病性.
- 来自RNA-seq的功能证据支持对具有不确定的意义的变异进行重新分类,有助于在特定情况下的诊断解决.
结论:
- RNA测序在临床上有价值,用于检测单独通过DNA测序或预测工具无法解决的拼接和调节缺陷.
- 将RNA-seq集成到临床工作流程中,支持对特定遗传疾病的变异分类和诊断解决.
- RNA-seq提供了机理性的见解,改善了对罕见遗传疾病的患者护理和遗传咨询.
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