EGFLAM病原型变种和先天性静止性夜盲症
Sanja Boranijasevic1, Vasily Smirnov1,2,3, Julien Navarro1
1Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France.
JAMA ophthalmology
|December 4, 2025
概括
EGFLAM基因中的遗传变异导致先天性静止夜盲 (CSNB),这是一种罕见的遗传视网膜疾病. 这一发现有助于诊断CSNB,并开发未来的治疗方法.
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:
- 先天性静止夜盲 (CSNB) 是一种异质的遗传视网膜疾病 (IRD).
- 许多完整的CSNB (cCSNB) 病例的遗传原因尚不清楚.
- 识别IRD遗传缺陷可以改进诊断和治疗开发.
研究的目的:
- 描述来自两个无关家族的cCSNB患者的表型和潜在基因缺陷.
- 为了确定cCSNB的新型遗传原因.
- 为了解IRD病原体做出贡献.
主要方法:
- 对来自法国和荷兰队列的3名患者进行了回顾性病例系列分析.
- 临床检查包括多模式视网膜成像和ffERG.
- 使用基因组测序 (GS),外体测序 (ES) 和桑格测序的遗传分析.
主要成果:
- 在 EGFLAM 基因中确定了同卵性致病变体 (c.1563_1566del 和 c.1795C>T) 在两个具有 cCSNB.的家族中.
- 患者呈现出高近视,视敏度下降,夜盲和特征性的ffERG发现.
- 突出了EGFLAM蛋白质局部化和在ON双极细胞信号传递中的功能.
结论:
- EGFLAM基因缺陷与人类cCSNB有关.
- 临床医生应考虑在IRD的诊断基因小组中使用EGFLAM.
- 这一发现促进了对cCSNB的准确诊断,遗传咨询和潜在的治疗策略.
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