通过AB5亚基酶细胞毒素诱导ISR,通过STING激活驱动pDCs中的I型IFN表达
Daniela Barros1,2, Beatriz H Ferreira1,3, Paulina Garcia-Gonzalez2
1Institute of Biomedicine, Department of Medical Sciences, University of Aveiro, Aveiro 3810-193, Portugal.
概括
细菌细胞毒素SubAB触发了免疫细胞中展开的蛋白质反应 (UPR) 和炎症. 它特别通过STING激活在血细胞树突细胞中增强I型干扰素的产生.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 微生物病原体的产生
背景情况:
- 展开的蛋白质反应 (UPR) 是细胞应激途径.
- 细菌细胞毒素可以调节宿主免疫反应.
- 了解病原体与宿主相互作用对于疾病控制至关重要.
研究的目的:
- 为了研究AB5亚酶细胞毒素 (SubAB) 对人类免疫细胞的影响.
- 阐明SubAB诱导炎症和抗病毒反应的机制.
- 探索UPR和STING激活在SubAB介导免疫中的作用.
主要方法:
- 人类外周血液单核细胞 (PBMCs) 暴露于SubAB.
- 对细胞因子和干扰素表达的分析.
- 研究包括UPR,STING,PERK和eIF2α酸化在内的信号通路.
- 对Tax1结合蛋白1 (TхВP1) 条例的评估.
主要成果:
- 在PBMCs中,SubAB诱导了UPR和一种前炎性反应.
- SubAB可选择性地增强血细胞树突细胞中的I型干扰素 (IFN) 表达,与TLR7刺激协同作用.
- 第一种类型的IFN诱导取决于STING激活,PERK介导的蛋白质合成抑制和TхВP1.1的下调.
- 通过综合应激反应阻碍mRNA转化对于STING信号传递至关重要.
结论:
- SubAB操纵宿主细胞机械,以促进炎症和抗病毒状态.
- STING 途径和 UPR 是 SubAB 免疫调节效应的关键调解者.
- 这些发现揭示了UPR诱导条件在感染期间影响免疫调节的机制.
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