一种导致孤立黄斑病的USH2A变异:一种新的表型
Param Bhatter1, Gabrielle Hallai1, Meghan J Debenedictis1,2
1Cole Eye Institute, Cleveland Clinic Foundation, Cleveland Ohio, USA.
Ophthalmic genetics
|July 8, 2025
概括
这项研究详细介绍了一种罕见的孤立黄斑病因USH2A基因突变引起的罕见病例. 基因分析发现了一种特定的USH2A变异,突出了与阿舍尔综合征相关的视网膜变的新型呈现.
科学领域:
- 眼科医生 眼科 眼科
- 遗传学 是一个遗传学.
- 视网膜发育不良症 视网膜发育不良症
背景情况:
- 阿舍氏综合征 (USH) 是一种遗传性疾病,通常会导致听力损失和逐渐视力受损.
- USH2A基因突变是USH的常见原因,通常表现为杆状视网膜变现型.
- 以前的文献表明,与USH2A相关的视网膜发育不良通常会影响外周视力,并呈现棒功能障碍.
研究的目的:
- 报告与特定的USH2A基因型相关的单独的黄斑病例.
- 描述与非典型USH2A相关的视网膜变症患者的临床和遗传发现.
主要方法:
- 详细的眼科检查包括 funduscopy, fundus自光,光学连贯性断层扫描 (OCT) 和多焦点和全场电网膜扫描 (ERG).
- 针对遗传性视网膜衰变的综合基因检测.
- 临床发现与遗传结果结合的分析.
主要成果:
- 一名65岁的男性呈现出渐进的中部视力丧失.
- 眼科成像显示了对膜色素变化,视网膜变薄和光感受器损失.
- 基因测试在USH2A基因 (c.10342G>A,p. Glu3448Lys) 中发现了一种同卵性致病变体.
- ERG显示中心反应减弱,阴影功能正常,阴影功能减弱.
结论:
- 这一病例代表了USH2A相关视网膜变质症中第一个单独的黄斑病例的记录.
- 这些发现扩大了已知的USH2A突变的表型谱.
- 基因检测对于诊断视网膜发育不良症的非典型表现至关重要.
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