在巴德特-比德尔综合征中,新的BBS1删除和BBS9无意义的致病变体
Janice Min Li1, Erika Tavares1, Jacque L Duncan2
1Genetics and Genome Biology, The Hospital for Sick Children, Toronto, Ontario, Canada.
Ophthalmic genetics
|December 2, 2024
概括
下一代测序在巴德特-比德尔综合征 (BBS) 病例中发现了新的遗传变异. 整个外体和基因组测序对于诊断未解决的视网膜退行性BBS病例至关重要.
科学领域:
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
- 眼科医生 眼科 眼科
背景情况:
- 巴德特-比德尔综合征 (BBS) 是一种罕见的遗传疾病,影响多个系统,特别是导致视网膜退化.
- 临床遗传检测可以在约80%的BBS病例中确定致病变体.
- 未解决的BBS病例是一个诊断挑战,需要先进的基因组方法.
研究的目的:
- 在两个巴德特-比德尔综合征病例中识别致病性遗传变异,这些病例以前未通过临床遗传测试得到解决.
- 证明下一代测序 (NGS) 在诊断复杂遗传疾病中的实用性.
主要方法:
- 基因组DNA从两个家族的探测器的外周血液中提取出来.
- 进行了全基因组或外基因组测序,随后对结构变异,单核酸变异 (SNV) 和插入/删除 (indels) 进行了全面的变异过.
主要成果:
- 在家族1中,在*BBS1*基因 (c.830 + 554_1110 + 1052del) 中发现了一种新鲜的删除,预计会导致过早停止编码.
- 在Family 2中,在*BBS9*基因 (c.724 G>T和c.966 G>A) 中发现了两种罕见的无意义SNV,其中一种是新型致病变体.
- 所有发现的新型变异都符合病原性分类的标准.
结论:
- 整个外体和基因组测序是识别未解决的巴德特-比德尔综合征病例的致病变异的有效工具.
- 这些先进的测序方法在罕见纤毛病的遗传诊断中起着至关重要的作用.
- 这些发现有助于了解BBS的遗传基础,并改善诊断产量.
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