解读遗传题:通过综合整体外体测序和细胞遗传分析揭示了发育延迟和9q重复的先天性异常的案例研究
Reyhaneh Dehghanzad1,2, Mohsen Aghajanpour Mir1,2, Zahra Golchehre2
1Department of Medical Genetics, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran.
Iranian journal of child neurology
|February 16, 2026
概括
整体外体测序 (WES) 有效地检测出新生儿与先天性异常 (CA) 和智力障碍 (ID) 的副本数变异 (CNVs). 这种基因测试方法有助于诊断最初分析中遗漏的复杂病例.
科学领域:
- 遗传学 是一个遗传学.
- 医学诊断 医学诊断 医学诊断
- 儿科 儿科 儿科
背景情况:
- 在全球范围内,先天性异常 (CAs) 影响约3%的新生儿,通常源自单基因疾病或染色体异常等遗传因素.
- 智力障碍 (ID) 或发育迟缓 (DD) 可以伴随CA,使诊断和管理复杂化.
- 整体外体序列测序 (WES) 是识别遗传变异的强大工具,包括单核酸多态 (SNP) 和插入/删除多态 (INDEL).
研究的目的:
- 评估整体外体测序 (WES) 的诊断实用性,以确定具有或没有智力障碍 (ID) /发育迟缓 (DD) 的先天异常 (CA) 的遗传原因.
- 在SNP/INDEL分析不具结论的情况下,通过WES检测复制数变异 (CNV) 的作用.
- 为全面的遗传诊断,将WES发现与常规细胞遗传学分析相关联.
主要方法:
- 在试验对象上进行DNA提取和整体外体测序 (WES).
- 使用基因组分析工具包 (GATK) 和美国医学遗传学和基因组学学院 (ACMG) 准则进行变异分析.
- 具有CTG带的高分辨率染色体分析 (造型造型) 用于患者和家长.
主要成果:
- 对于SNP/INDELs的初始WES没有在患有小头症,轻度ID和特定面部特征的患者中确定致病变体.
- 基于WES的CNV分析显示了9号染色体上的重复 (dup(9) ((q21.11q22.32)).
- 造型鉴定在患者 [46,XX,t(5;9) ((p15.1;q22.1),add(14) ((p11.1) ]和她的父亲 [46,XY,t(5;9) ((p15.1;q22.1) ] 中发现了独特的染色体重组,母亲的造型是正常的.
结论:
- 基于WES的CNV分析对诊断先天性异常 (CA) /智力障碍 (ID) /发育迟缓 (DD) 有效.
- 结合SNP/INDEL和CNV的WES,提供了一个全面的遗传诊断方法.
- 传统的细胞遗传学分析可以补充WES发现,以完全了解染色体异常.
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