在1F型阿舍尔综合征患者中PCDH15非编码区域的复合异合体变异:小基因试验显示了c.3123-1G>C的致病性
Jiale Wang1, Ya Li2,3, Shun Yao2,3
1Department of Ophthalmology, Zhengzhou University People's Hospital, Henan Provincial People's Hospital, Zhengzhou, China.
Ophthalmic genetics
|October 24, 2025
概括
这项研究在患有阿舍尔综合征1F型的患者中发现了PCDH15基因的两个非编码变异. c.3123-1G>C变种破坏了mRNA拼接和蛋白质翻译,证实了其致病性.
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:
- 基因的非编码区域对疾病贡献的研究不足.
- 艾舍尔综合征1F型 (USH1F) 是一种影响听力和视力的遗传性疾病.
研究的目的:
- 为了研究USH1F在患有未识别变异的患者中的遗传基础.
- 分析PCDH15基因中的非编码变异,以发现疾病的关联.
主要方法:
- 眼科检查和整个外体序列测序 (WES).
- 构建和验证一个PCDH15微型基因.
- 生物信息学分析以预测蛋白质结构和功能的变异性影响.
主要成果:
- 在PCDH15基因中发现了两种复合异构性非编码变体 (c.-183_-29+1del和c.3123-1G>C).
- 这种c.3123-1G>C变异导致24个表因子跳转,过早的蛋白质翻译终止,以及蛋白质结构/局部变化.
- 鉴定出的变异与患者的USH1F表型有关.
结论:
- 迷你基因测试对长基因变异的致病性评估是有效的,例如PCDH15.
- PCDH15 c.3123-1G>C变异是一种致病突变,导致Usher综合征1F型.
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