35个未解决的遗传视网膜疾病家族的查副本数变化
Xiaozhen Liu1,2, Hehua Dai3, Genlin Li4
1Department of Ophthalmology, Peking University Third Hospital, Beijing, 100191, China.
Human genetics
|January 28, 2024
概括
副本数量变异 (CNVs) 显著导致遗传视网膜发育不良 (IRDs). 除了SNV和indels外,对CNV的查大大提高了IRD诊断率,识别了新突变并扩大了已知的遗传谱.
科学领域:
- 遗传学 是一个遗传学.
- 眼科医生 眼科 眼科
- 分子生物学分子生物学
背景情况:
- 遗传性视网膜发育不良 (IRDs) 是一组异质的遗传性疾病.
- 在初始基因查单核酸变异 (SNV) 和小插入/删除 (indels) 后,IRD病例的很大一部分仍未被诊断出来.
- 复制数变异 (CNV) 越来越被认为是IRDs的重要遗传贡献者.
研究的目的:
- 在35个未解决的遗传视网膜发育不良 (IRD) 家庭中选复制数变异 (CNV).
- 在IRD患者中确定CNV查的诊断产量,这些患者之前有负的SNV/indel分析.
- 识别新的CNV并扩大IRD已知的突变谱.
主要方法:
- 使用下一代测序 (遗传性眼病丰富面板或整个外体测序) 进行SNV和indels的初始查.
- 通过桑格测序验证SNVs/indels和共同分离分析.
- 多重联结依赖的探头放大 (MLPA),定量光PCR (QF-PCR) 和桑格测序用于CNV检测.
主要成果:
- 在35个家族的16个IRD相关基因中,在33个不同的事件中确定了CNV.
- 在CNV驱动的IRD中,PRPF31,EYS和USH2A是最经常涉及的基因.
- 这项研究确定了14种新的CNV,包括26种删除和7种重复,增加了IRD的诊断率.
结论:
- CNVs在IRDs的病因学中发挥着重要作用.
- 包括CNV分析在内的综合基因查显著提高了IRD的诊断产量.
- MLPA和QF-PCR是有效的CNV验证方法,发现的新型CNV扩大了对IRD遗传学的理解.
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