包含TIR域的蛋白C作为天生的免疫检查点的调节器
Leon Heine1,2, Hannah Griffiths1,2, Huiyun Hu1,2
1Institute of Medical Microbiology and Hygiene, Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Germany.
Scientific reports
|November 27, 2025
概括
来自大肠杆菌的毒性因子TCpC在感染期间增强了促炎性细胞因子的释放,但在内毒素刺激期间抑制了它,调节了先天免疫反应.
科学领域:
- 免疫学 免疫学 免疫学
- 微生物学 微生物学
- 分子生物学分子生物学
背景情况:
- 泌尿病原性大肠杆菌 (UPEC) 使用毒性因子来逃避宿主防御.
- 收费类受体 (TLR) 和炎症体通路对抗细菌感染的先天免疫非常重要.
- UPEC病毒性因子TcpC针对这些先天性免疫路径.
研究的目的:
- 研究TCPC在调节先天免疫反应中的作用.
- 阐明TCPC在各种条件下对细胞因子分泌的差异性影响.
主要方法:
- 人类上皮细胞和单细胞THP-1细胞感染UPEC CFT073表达TcpC.
- 对细胞因子分泌的分析.
- 单细胞分化和两极化成巨细胞 (M0和M1).
- 诱导TcpC的表达和通过内毒素和ATP的刺激.
主要成果:
- 在UPEC感染期间,TcpC加剧了TLR4依赖的促炎细胞因子分泌.
- 在单细胞细胞和外围血液单核细胞中,TCPC放大了免疫反应.
- 大细胞分化 (M0) 和极化 (M1) 减少了TcpC的影响.
- 在感染期间,TcpC增强了细胞因子的释放,但在内毒素刺激期间抑制了它.
结论:
- TcpC根据刺激差异调节天生的免疫反应.
- TcpC的活性取决于情境,在感染期间增强反应,并在内毒素挑战期间抑制它们.
- 了解TCPC的双重功能对于开发针对UPEC感染的向疗法至关重要.
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