在AMD患者中,终端补充复合物的血水平增加:对RPE细胞的潜在功能后果
Catharina Busch1, Saskia Rau2, Andjela Sekulic2
1Department of Ophthalmology, University Hospital Leipzig, Leipzig, Germany.
Frontiers in immunology
|June 26, 2023
概括
在与年龄相关的黄斑变性 (AMD) 患者中,较高的终端补充复合体 (TCC) 水平与RPE细胞的炎症反应相关. 这表明TCC升高在AMD发病过程中起着重要作用,独立于遗传风险因素.
科学领域:
- 眼科医生 眼科 眼科
- 免疫学 免疫学 免疫学
- 遗传学 遗传学 是一个
背景情况:
- 补充基因中的多态性与与年龄相关的黄斑变性 (AMD) 风险有关.
- 与风险相关的多态导致替代补充路径的控制受损.
研究的目的:
- 在湿 AMD 患者中研究终端补充复合体 (TCC) 水平.
- 确定AMD患者血补充激活对视网膜色素表皮 (RPE) 细胞的影响.
主要方法:
- 从87名湿性AMD患者和86名对照组收集了血.
- 对风险等位基因的基因型定型 (CFH 402HH,ARMS2 rs3750846) 和TCC水平的确定.
- 在体外分析RPE功能,包括Ca2+成像和基因/细胞因子表达.
主要成果:
- 与对照组相比,AMD患者的血TCC水平高出5倍,而不考虑遗传风险等位基因.
- 患者血在RPE细胞中诱导了明显的Ca2+信号,与TCC水平相关.
- 暴露在AMD患者的血中使RPE细胞敏感,增加了促炎性细胞因子分泌和保护性基因表达.
结论:
- 血TCC水平升高是AMD病理学的重要因素.
- 患有AMD患者的血会诱导一种亲炎性RPE表型和对TCC的保护性反应.
- 观察到的效应独立于常见的AMD遗传风险因素.
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