毒素淋巴菌效应剂GRA83调节宿主的天生的免疫反应,以调节寄生虫感染
Amara C Thind1,2, Caroline M Mota3, Ana Paula N Gonçalves3
1Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles , Los Angeles, California, USA.
mSphere
|September 28, 2023
概括
这种毒性淋巴细胞 (Toxoplasma gondii) 是
科学领域:
- 寄生虫学和免疫学
- 宿主-病原体相互作用
- 分子生物学分子生物学
背景情况:
- 毒素菌调节宿主细胞功能,使用从密集颗粒分泌的效应蛋白.
- 密集颗粒 (GRA) 蛋白对于营养获取,细胞循环控制和免疫规避至关重要.
- 了解这些因子是控制毒素菌的关键,毒素菌是一个重大的公共卫生问题.
研究的目的:
- 描述一种新的密集颗粒蛋白,GRA83,以及它在T. gondii感染中的作用.
- 研究GRA83对宿主免疫反应和寄生虫毒性的影响.
- 确定GRA83.3的潜在互动合作伙伴.
主要方法:
- 在T. gondii tachyzoites和bradyzoites中GRA83的基因破坏.
- 病毒性测定,包括体重减轻和寄生病测量.
- 在受感染的巨细胞和小鼠中分析细胞因子 (IL-12,IFN-gamma).
- 评估NF-κB通路的激活情况.
- 贴近标签以识别蛋白质相互作用.
主要成果:
- 干扰GRA83增加了病毒性,寄生病和囊负担.
- 删除GRA83导致IL-12和IFN-的产生减少.
- 减少IL-12与减少NF-κB p65核转移相关.
- 显然,GRA83和GRA15的作用是在 NF-κB 途径的融合上.
- 近距离标记确定了候选GRA83的交互伙伴.
结论:
- GRA83是一种新型效应剂,可刺激宿主天生的免疫反应.
- GRA83在调节寄生虫毒性和宿主免疫逃逸方面发挥着至关重要的作用.
- 准GRA83可能是控制T. gondii感染的一种策略.
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