吉亚迪亚VSPAS7蛋白减弱吉亚迪亚肠道诱导的宿主巨细胞质灭
Min Sun1, Zhiteng Zhao1, Ying Li1
1State Key Laboratory for Zoonotic Diseases, Key Laboratory for Zoonosis Research of the Ministry of Education, Institute of Zoonosis, and College of Veterinary Medicine, Jilin University, Changchun, 130062, China.
Parasites & vectors
|October 11, 2023
概括
大肠使用像VSPAS7这样的变异特异性表面蛋白 (VSPs) 来逃避宿主免疫力. 通过与NLRP3相互作用,VSPAS7抑制了Giardia诱导的热和炎症性细胞因子释放,有助于寄生虫免疫逃逸.
科学领域:
- 免疫学 免疫学 免疫学
- 寄生虫学的寄生虫学
- 细胞生物学 细胞生物学
背景情况:
- 肠 (Giardia intestinalis) 构成了严重的公共卫生威胁,感染人类和动物.
- 寄生虫通过其表面和细胞外囊中的变异特异性表面蛋白 (VSP) 逃避宿主免疫反应.
- 在调节热和促进免疫逃避方面,VSPs的作用在很大程度上仍未得到研究.
研究的目的:
- 研究Giardia VSPAS7在调节宿主信号通路和热的功能.
- 阐明VSPAS7影响Giardia引起的免疫反应的机制.
- 为了确定VSPAS7是否有助于Giardia的免疫逃避策略.
主要方法:
- 构建了一个pcDNA3.1-vspas7表达等离子体,用于转化为小鼠巨细胞.
- 通过西部斑点,ELISA和LDH测定分析了烧灭症标记物 (caspase-1,GSDMD裂变,IL-1β,LDH释放).
- 通过免疫光测试,共免疫沉和双分子光补充,研究了VSPAS7-NLRP3相互作用.
主要成果:
- VSPAS7降低了Giardia诱导的p65,IκBα和ERK的酸化,抑制了NF-κB和ERK/MAPK信号传递.
- VSPAS7抑制了促炎性细胞因子 (IL-6,IL-12 p40,TNF-α) 的分泌.
- VSPAS7通过减少GSDMD裂变,caspase-1激活,IL-1β释放和LDH释放来抑制巨细胞灭,这种效应取决于NLRP3相互作用.
结论:
- 在宿主巨细胞中,VSPAS7抑制了Giardia诱导的信号通路激活和热.
- VSPAS7在使Giardia能够逃避宿主免疫反应方面发挥着至关重要的作用.
- 这些发现为了解Giardia病原性和VSP介导的免疫逃避提供了理论基础.
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