概括
在综合征 (NS) 中存在并激活了替代补充路径的组成部分. 然而,删除补充因子C3,因子B (FB) 或因子D (FD) 并没有阻止NS小鼠的保留.
科学领域:
- 肝脏病学
- 免疫学
- 补充系统生物学
背景情况:
- 替代补充路径 (ACP) 涉及补充成分3 (C3),B因子 (FB) 和D因子 (FD).
- 这些ACP成分在脏病小鼠的尿液中被发现,但它们在脏病综合征 (NS) 中积的作用尚不清楚.
研究的目的:
- 调查ACP成分 (C3,FB,FD) 在NS遗传小鼠模型中调节的作用.
- 确定C3,FB或FD的遗传缺陷是否可以防止NS的保留和上皮通道 (ENaC) 激活.
主要方法:
- 使用一种具有诱导式素删除的NS基因小鼠模型 (Nphs2Δipod).
- 生成的Nphs2Δipod小鼠缺乏C3,FB或FD (Nphs2Δipod*C3-/-,Nphs2Δipod*Cfb-/-,Nphs2Δipod*Cfd-/).
- 用多西环素诱导NS,并通过免疫组织化学分析尿液的ACP成分,度和ENaC激活.
主要成果:
- 在脏尿液中检测到ACP成分 (C3,FB,FD) 和碎片,表明内ACP激活.
- 缺乏FB或FD没有影响C3激活.
- 所有瘤小鼠的基因型都表现出相似的蛋白质溶解ENaC激活,保留 (尿液< 20毫米) 和体重增加.
结论:
- 在性综合征中,替代补充路径的组成部分存在并被激活在内.
- 在这种NS模型中,C3,FB或FD的遗传删除不能防止ENaC激活和保留.
- 在这种性综合征模型中,替代补充途径不是保留的主要驱动因素.
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