在尿路感染期间,Tamm-Horsfall蛋白增加了中性粒细胞NETosis
Vicki Mercado-Evans1,2, Holly Branthoover1, Claude Chew3
1Department of Molecular Virology and Microbiology.
JCI insight
|November 26, 2024
概括
坦姆-马尾糖蛋白 (THP) 对于控制尿路感染 (UTI) 是至关重要的. THP增强了中性粒细胞外细胞陷形成 (NETosis),这是一个关键的防御机制,改善了对尿路感染的宿主保护.
科学领域:
- 泌尿器科 泌尿器科 泌尿器科 泌尿器科
- 免疫学 免疫学 免疫学
- 微生物学 微生物学
背景情况:
- 中性粒细胞是尿路感染 (UTI) 中的关键免疫细胞,但其精确的作用和调节尚未完全理解.
- 尿液中丰富的Tamm-Horsfall糖蛋白 (THP) 可以抑制中性粒细胞的炎症反应.
- 在尿路感染中THP的保护功能需要进一步阐明.
研究的目的:
- 调查THP在尿路感染期间调节中性粒细胞功能的作用.
- 为了确定THP是否影响中性粒细胞外细胞陷形成 (NETosis).
- 阐明THP影响NETosis的分子机制.
主要方法:
- 利用尿路感染的小鼠模型来比较野生型 (WT) 和缺乏THP的小鼠.
- 用人中性粒细胞在体外光基NET试验中使用.
- 进行蛋白质组分析和流细胞计,以评估NETosis和中性粒细胞形态.
主要成果:
- 缺乏THP的小鼠在尿路感染期间表现出更高的细菌负载,增加了中性粒细胞透,以及更严重的组织损伤.
- 在尿路感染模型中,THP缺乏导致尿路NETosis受损.
- 在体外,THP增强了ROS依赖的NETosis,并促进了特征性的NETosis形态,独立于单独的酸.
结论:
- THP是尿路中NETosis的关键调节者.
- 通过增强NETosis,THP在宿主防御尿路感染方面发挥着重要作用.
- THP对中性粒细胞功能的调节是尿路宿主保护的组成部分.
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