关于两种RAB3GAP1病原体变异在华堡微症候群中的第一份临床报告
Nejmiye Akkuş1, Tuğba Akın Duman2
1Department of Medical Genetics, Faculty of Medicine, Tokat Gaziosmanpasa University, Tokat, Türkiye.
Journal of pediatric genetics
|August 14, 2023
概括
两个新的RAB3GAP1基因突变导致华堡微症候群 (WARBM),一种严重的遗传疾病,影响大脑和眼睛的发育. 这项研究在受影响患者中确定了与WARBM1综合征相关的新型变异.
科学领域:
- 遗传学 是一个遗传学.
- 发展生物学 发展生物学
- 眼科医生 眼科 眼科
背景情况:
- 华堡微型综合征 (WARBM) 是一种罕见的自体相衰退性疾病.
- 它的特征是严重的小头症,微症,智力障碍和低血压.
- 包括RAB18,RAB3GAP2,RAB3GAP1和TBC1D20在内的基因中的功能丧失突变是已知的原因.
研究的目的:
- 报告RAB3GAP1基因中的两个新型同卵性突变.
- 描述两个与这些突变无关的患者的临床表现.
- 为了解WARBM中的基因型-表型相关性做出贡献.
主要方法:
- 使用了下一代测序和桑格测序.
- 遗传分析的重点是识别与WARBM相关的基因突变.
- 收集了包括体检和发育评估在内的临床数据.
主要成果:
- 两个无关患者在RAB3GAP1:c.559C>T (p.Arg187Ter) 和c.520C>T (p.Arg174Ter) 中呈现同胞性无意义变异.
- 两位患者都表现出经典的WARBM特征:小头症,小眼症,小角质,双边先天性白内障,严重的智力障碍和先天性低血压.
- 预计这些新型拼接部位突变会导致过早停止密码子,从而导致WARBM1表型.
结论:
- 这项研究为两种与沃堡微型综合征相关的截然不同的,以前未报告的RAB3GAP1变体提供了第一个临床报告.
- 这些发现扩大了导致WARBM的已知突变的范围.
- 这些变异的遗传鉴定有助于诊断和了解该综合征的分子基础.
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