对2,246个独特的ABCA4变种进行临床变种分类汇编,以澄清Stargardt疾病的变种致病性,使用修改的ACMG/AMP框架
Stéphanie S Cornelis1, Miriam Bauwens2,3, Lonneke Haer-Wigman1
1Department of Human Genetics, Radboud University Medical Center, Nijmegen, Netherlands.
Human mutation
|April 14, 2025
概括
确定ABCA4基因变异的致病性是具有挑战性的. 这项研究利用广泛的数据重新分类了2,246种ABCA4变异,改善了对Stargardt病患者的诊断和遗传咨询.
科学领域:
- 眼科医生 眼科 眼科
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
背景情况:
- 在ABCA4基因中的双变异是斯塔格特病 (STGD1) 的主要原因,这是最常见的遗传性黄斑疾病.
- 将ABCA4变体分类是复杂的,因为有许多变体,罕见的等位基因,缺乏相位数据的复杂等位基因,可变的表达性,以及低形变体的透率降低,导致许多意义不明的变体.
研究的目的:
- 为了重新分类ABCA4基因内的变异的致病性.
- 提高与ABCA4变异相关的遗传视网膜疾病的诊断和遗传咨询的准确性.
主要方法:
- 汇编了大约11000名ABCA4相关遗传视网膜疾病的试验者的数据,从文献中收集到2020年.
- 适应的ACMG/AMP分类指南,结合了ClinGen的建议,用于ABCA4变种.
- 将这些分类应用于ABCA4莱登开放变异数据库 (LOVD) 中的所有2,246个独特变异.
主要成果:
- 成功分配了2,246个独特的ABCA4变体的致病性分类.
- 1248种变异被归类为可能致病或致病.
- 194种变异被归类为可能良性或良性.
结论:
- 这种基于迄今为止最大的数据集的ABCA4变种的全面重新分类,为变种病原性提供了更准确的理解.
- 改进的分类系统将有助于对受ABCA4相关视网膜病变影响的个体进行诊断和遗传咨询.
- 这种结构化的方法解决了ABCA4变体解释的挑战,有利于临床实践和患者护理.
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