使用染色体微阵列和基于三元的整体外基因组测序对患有先天性心脏病的儿童的遗传发现
Rui Guo1,2, Chunhong Duan2, Mehdi Zarrei3,4
1Pediatric Research Institute, Children's Hospital Affiliated to Shandong University (Jinan Children's Hospital), Jinan, 250022, China.
Scientific reports
|July 27, 2025
概括
使用染色体微阵列分析和全外基组测序的基因检测显著改善了先天性心脏病 (CHD) 的诊断. 结合这些方法提供了更高的诊断产量,特别是当心脏外特征存在时.
科学领域:
- 遗传学 是一个遗传学.
- 儿科 儿科 儿科
- 医学诊断 医学诊断 医学诊断
背景情况:
- 先天性心脏病 (CHD) 是人类最常见的出生缺陷,遗传因素在其发展中发挥着重要作用.
- 尽管已知遗传贡献,但许多心血管疾病病例的特定遗传原因仍未确定.
- 这项研究调查了在一群受影响的个人及其父母中,心血管疾病的遗传基础.
研究的目的:
- 为了确定结合染色体微阵列分析 (CMA) 和基于三组的整体外基因组测序 (WES) 对患有心脏病的个体的诊断产量.
- 确定与心脏病相关的特定遗传变异,包括染色体异常和序列级变异.
- 评估 trio-WES 在识别导致冠状动脉疾病的新突变中的实用性.
主要方法:
- 分析了101名心血管疾病患者及其未受影响的父母的队列.
- 染色体微阵列分析 (CMA) 是所有受影响个体的第一级诊断测试.
- 基于三组的整个外体序列测定 (WES) 针对76名试验者及其父母进行,另外3名试验者仅进行了WES.
主要成果:
- 综合基因诊断产量为28.7%,包括20.8%的染色体异常和7.9%的序列级变异.
- 在19个个体中发现了致病副本数变异 (CNV),其中22q11.2删除综合征是最常见的.
- 在8个基因中发现了致病性单核酸变体 (SNVs) /插入删除 (InDels),包括GATA6,FLNA和SMAD6.
- 三重测序在55.6%的病例中发现了致病变异,主要是新的误解变异.
- 诊断检测率在患有心脏外特征的人群中 (61.5%) 与患有孤立心脏病的人群 (17.3%) 相比显著更高.
结论:
- 结合CMA和三WES对于在患有心脏病的人身上进行综合基因检测至关重要.
- 基于Trio的WES应该被整合到CHD的诊断算法中,以识别引起的遗传变异.
- 心脏外特征的存在显著增加了鉴定心脏病遗传原因的可能性.
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