探索VAV2罕见变体在初级开角眼中的作用:遗传见解和病理生理机制
Runze Li1,2, Yuhong Chen3, Shanshan Zhang1
1Sichuan Provincial Key Laboratory for Human Disease Gene Study and the Center for Medical Genetics, Department of Laboratory Medicine, Sichuan Academy of Medical Sciences and Sichuan Provincial People's Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu, 610075, China.
Science China. Life sciences
|September 2, 2025
概括
主要开角眼 (POAG) 是导致失明的主要原因. 这项研究确定了VAV2基因是POAG的风险因素,揭示了它在视网膜质细胞健康和眼内压力调节中的作用.
科学领域:
- 眼科 眼科
- 遗传学
- 细胞生物学
背景情况:
- 主要开角眼 (POAG) 是全球不可逆转失明的主要原因.
- 视网膜质细胞 (RGC) 退化是POAG的主要机制.
- 识别与POAG相关的遗传因素对于了解疾病的发病和开发诊断工具至关重要.
研究的目的:
- 在汉族人群中识别与初级开角玻璃眼 (POAG) 相关的新基因.
- 调查发现的基因,瓦核酸交换因子2 (VAV2) 在POAG发病过程中的功能作用.
- 探索VAV2在Rho信号通路中的参与及其对眼睛结构和RGC的影响.
主要方法:
- 在398名汉族POAG患者和2,010名对照人群中进行了整体外体测序 (WES).
- 用人状网细胞和661W细胞系进行了功能分析,以评估VAV2变异的影响.
- 使用Vav2淘汰赛小鼠模型来评估体内POAG相关的表型.
主要成果:
- 九种罕见的VAV2变异与POAG显著相关 (P_ burden=1. 40×10-6).
- VAV2 变体影响了状网细胞的细胞骨组织和RGC 的轴突生长.
- 在VAV2淘汰的小鼠中,眼内压力升高,眼道网格异常,视觉敏感性降低和RGC损失.
结论:
- VAV2被确定为与初级开角青光瘤相关的新型候选基因.
- 破坏VAV2功能通过影响状细胞网的完整性和RGC存活率,导致POAG病理.
- VAV2是POAG遗传查和诊断方法的潜在目标.
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