登革热病毒利用自囊和分泌途径来促进人类树突细胞的传播
Alexandra P M Cloherty1,2, Anusca G Rader1,2,3, Kharishma S Patel1,2
1Department of Experimental Immunology, Amsterdam UMC, University of Amsterdam, Amsterdam, Netherlands.
Frontiers in immunology
|June 12, 2024
概括
登革热病毒利用自和细胞外囊泡进行树突细胞的复制和传播. 针对这些途径可以提供新的抗病毒治疗登革热.
科学领域:
- 病毒学 病毒学
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
背景情况:
- 登革热病毒 (DENV) 构成了严重的全球健康威胁,其发病率和疫情正在增加.
- 目前对登革热的治疗仅限于支持性护理,这凸显了对新型抗病毒疗法的需求.
- 树突细胞 (DCs) 在早期DENV感染和全身传播中至关重要,但自在这个过程中的作用尚不清楚.
研究的目的:
- 调查自和细胞外囊泡 (EV) 释放在树突细胞介导的DENV传播中的作用.
- 阐明在人类初级DCs的DENV感染期间自的时间动态和功能意义.
- 确定潜在的宿主导的治疗点,以限制DENV传播.
主要方法:
- 主要的人类树突细胞 (DCs) 被DENV感染,以研究自.
- 使用显微镜和生物化学分析分析了自细胞形成,LC3表达和EV释放.
- 进行了同局部化研究,以评估病毒组件和自胞体之间的相互作用.
- 在EV中量化了DENVRNA含量.
主要成果:
- DENV感染增强了人类初级DC中的自细胞形成,与增加的易感性相关.
- 病毒复制中间体与自细胞共定位,DENV阻断感染DC的晚期自细胞降解.
- 一个由直流衍生的EV子集 (CD9/CD81/CD63+) 含有自标记物LC3并促进DENV传播.
- 自细胞积累和带有病毒RNA的EVs代表了DC介导的DENV传播的关键机制.
结论:
- 自和细胞外囊泡途径被DENV利用,通过树突细胞进行复制和传播.
- 阻断自细胞形成和EV释放是一个有前途的宿主导的治疗策略来预防登革热.
- 了解这些宿主-病原体相互作用对于开发有效的抗登革热干预措施至关重要.
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