寄生虫的细胞因子:通过分子模仿来操纵宿主反应
Rick M Maizels1, Henry J McSorley2, Hermelijn H Smits3
1School of Infection and Immunity, University of Glasgow, Glasgow, U.K.
The Biochemical journal
|April 30, 2025
概括
虫寄生虫分泌转化生长因子-β (TGF-β) 模仿物 (TGMs),操纵宿主免疫力. 这些TGM,像TGM1,可以诱导调节性T细胞并减少炎症,展示寄生虫免疫逃避策略.
科学领域:
- 寄生虫学的寄生虫学
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
背景情况:
- 虫寄生虫使用复杂的免疫逃避策略.
- 这些策略通常涉及操纵宿主细胞因子网络.
- 转化生长因子-β (TGF-β) 信号传输是寄生虫操纵的一个关键目标.
研究的目的:
- 为了研究由Heligmosomoides polygyrus分泌的TGF-β模仿体 (TGMs) 的结构和功能.
- 了解TGM如何与宿主TGF-β受体和共受体相互作用.
- 阐明不同TGM家族成员的免疫调节作用.
主要方法:
- 分析TGM蛋白质结构和域功能.
- 在体外研究TGM诱导的T调节细胞分化.
- 在体内评估TGM对过敏和肠道炎症模型的影响.
主要成果:
- 确定了一个由H. polygyrus分泌的十个TGM家族.
- TGM1模仿TGF-β,诱导Foxp3+T调节细胞,并减少炎症.
- 不同的TGM表现出多样化的域结构,通过联合受体结合 (例如CD44) 在特定细胞类型上实现独特的激动性或对抗性功能.
结论:
- TGMs是高度进化的虫免疫调节剂,模仿宿主细胞因子结合TGF-β受体.
- 特定的TGM变体可以充当激动剂或抗剂,向不同的细胞类型.
- 虫逃避分子展示了建立和维持长期感染的多种策略.
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