全基因组测序可以从一个干血斑样本的单个子冲击中识别出临床相关的变异
David J McBride1, Claire Fielding1, Taksina Newington1
1Illumina Cambridge Ltd., Cambridge CB21 6DF, UK.
International journal of neonatal screening
|September 27, 2023
概括
干血斑 (DBS) 允许新生儿对罕见疾病进行查. 从DBS直接进行全基因组测序 (WGS),为检测引起疾病的基因变异提供了与外周血液DNA相当的数据质量.
科学领域:
- 基因组学就是基因组学.
- 生物化学 生物化学
- 临床诊断 临床诊断 临床诊断
背景情况:
- 干血斑 (DBS) 对于全球新生儿查至关重要.
- 全基因组测序 (WGS) 需要高质量的DNA输入来准确检测变异.
- 传统的WGS方法通常使用从外周血液中提取的DNA.
研究的目的:
- 从DBS直接评估WGS的可行性和性能.
- 将DBS的WGS数据质量与外围血液DNA的数据质量进行比较.
- 评估DBS穿孔大小和数量对WGS库生成和数据质量的影响.
主要方法:
- 从各种DBS穿孔大小 (3-6毫米) 直接生成WGS库.
- 在DBS和外周血液DNA之间比较WGS指标 (例如,覆盖范围,变体检测).
- 分析了来自囊性纤维化和类尿症患者的样本中的致病基因变异的WGS数据.
主要成果:
- 从单个 DBS 穿孔 (3 毫米和 6 毫米) 成功生成 WGS 库.
- 在DBS和外周血液DNA之间观察到同等的数据质量指标.
- 在DBS和外周血液DNA之间检测囊性纤维化和基尿的致病变体没有区别.
结论:
- 整个基因组测序可以直接从干燥的血液斑点进行.
- DBS是WGS的灵活可靠输入,提供与外周血液DNA相当的性能.
- 来自DBS的直接WGS有助于快速发现用于疾病诊断的临床相关基因变异.
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