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Updated: May 20, 2025

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在为心律失常综合征进行基因检测的儿科试验者中重新分析临床和遗传变异

Sara B Stephens¹, Christopher W Follansbee², Tyler Novy³

¹Division of Pediatric Cardiology, Texas Children's Hospital and Baylor College of Medicine, Houston, TX USA.

|May 18, 2025

概括

遗传性心律失常综合征的遗传检测显示,随着时间的推移,诊断产量下降,意义不明的变异 (VUS) 增加. 定期的变异重新分类对于准确的诊断和患者管理至关重要.

科学领域:

心血管遗传学心血管遗传学
医学基因组学医学基因组学
儿童心脏病学儿童心脏病学

背景情况:

对遗传性心律失常综合征的诊断产量和变异重新分类的纵向数据有限.
针对遗传性心脏病的基因测试在儿科患者中越来越多地使用.

研究的目的:

为了确定诊断产量的纵向变化和遗传性心律失常综合征的变异分类.
评估不同时代的基因测试技术 (桑格与下一代测序) 对诊断结果的影响.

主要方法:

从2007年至2018年,对306名接受遗传检测的儿科试验对疑似遗传性心脏病的遗传检测进行了回顾性研究.
变体分类为诊断性,非诊断性或意义不明的变体 (VUS).
在2023年使用VarSome和ACMG标准对变种进行重新分类,比较早期 (2007-2013) 和后期 (2014-2018) 时代.

主要成果:

最初的诊断收益率为23.2%,其中21.2%被归类为VUS.
在后期,诊断收益率从34.1%下降到15.3%,而VUS从9.3%增加到29.9%.
变种重新分类改变了22.7%的试验者的身份,观察到降级和升级.

结论:

变异重新分类对诊断解释有重大影响,需要持续重新评估.
转向下一代测序的转变与诊断产量下降和VUS增加有关.
定期的变异重新解释对于遗传性心律失常综合征的精确遗传诊断至关重要.

关键词:

基因检测基因检测是指基因检测.长时间QT综合征儿科儿科儿科儿科重新分类的重新分类是什么变体解释变体解释

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