在胎儿结构异常中进行全基因组测序分析:新的表型-基因型发现
1Department of Obstetrics and Gynecology, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing, China.
概括
全基因组测序 (WGS) 有助于在其他遗传测试失败时诊断胎儿结构异常. 这项研究发现WGS在11.8%的病例中确定了致病变体,扩大了对遗传疾病的知识.
科学领域:
- 遗传学 遗传学 是一个
- 产前诊断 在产前诊断
- 基因组医学是基因组医学.
背景情况:
- 识别遗传变异对于诊断单基性疾病至关重要.
- 全基因组测序 (WGS) 越来越多地用于遗传诊断.
- 在产前环境中WGS的临床实用性数据有限.
研究的目的:
- 评估WGS在诊断胎儿结构异常方面的实施和临床实用性.
- 扩大对WGS在产前实践中的遗传诊断的理解.
主要方法:
- 进行了三组全基因组测序 (WGS),最低覆盖率为40×.
- 这项研究包括17个胎儿,超声波检测出异常和无信息的标准遗传测试 (CMA,ES).
- 测序是在MGI DNBSEQ-T7平台上进行的.
主要成果:
- 在11.8% (2/17) 的病例中发现了致病性遗传变异.
- 检测到的变异是小的外子级副本数变异 (3.03kb和5.16kb),CMA和ES无法检测到.
- 观察到FGF8与全脑/面部形之间存在一种新的产前关联.
结论:
- WGS在诊断胎儿结构异常时表现出临床价值,当常规基因检测没有确定性时.
- 这项研究扩大了BBS9和FGF8.8已知的突变和表型谱.
- 确定了新型变体和胎儿表现,有助于遗传疾病知识.
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