来自各种真菌病原体的细胞外囊泡诱导特定物种和依赖细胞内核的免疫调节
Geneva N Kwaku1, Kirstine Nolling Jensen1,2, Patricia Simaku1
1Division of Infectious Diseases, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA.
bioRxiv : the preprint server for biology
|January 13, 2025
概括
来自不同物种的真菌细胞外囊泡 (EV) 与宿主免疫细胞具有独特的相互作用. 一些真菌EVs上的细胞壁组件阻碍了免疫细胞的吸收和激活,影响了天生的免疫力.
科学领域:
- * 免疫学 免疫学
- * 微生物学 微生物学
- * 分子生物学 * 分子生物学
背景情况:
- *微生物细胞外囊泡 (EVs) 调解细胞间通信,调节宿主免疫反应.
- *真菌EVs可以激活先天免疫路径,包括通过cGAS-STING路径传递I型干扰素信号.
- *之前的研究表明,Candida albicans EVs可触发I型干扰素信号传递.
研究的目的:
- * 调查来自各种真菌物种的EVs与宿主天生的免疫细胞的差异性相互作用.
- * 确定真菌EV特性如何影响免疫细胞吸收,细胞因子反应和信号传递.
- *阐明真菌细胞壁成分在调节先天免疫激活中的作用.
主要方法:
- *从Candida albicans,Saccharomyces cerevisiae,Cryptococcus neoformans和Aspergillus fumigatus中分离和鉴定EVs的特征.
- * 评估小鼠巨细胞对EV内细胞化率的评估.
- * 测量细胞因子反应和内在免疫信号激活在巨细胞在EV暴露后.
- * 分析真菌EV内部化的转录和功能后果.
主要成果:
- *真菌EV在巨细胞内细胞发生率和随后的免疫反应方面表现出特定物种的差异.
- *来自C. albicans,S. cerevisiae,C. neoformans和A. fumigatus的EV诱导了各种细胞因子配置和天生的免疫信号.
- * C. neoformans 和 A. fumigatus EVs 上的细胞壁组成部分抑制了巨细胞的有效内化.
- *这种抑制导致本质免疫激活减弱.
结论:
- *真菌EV-免疫细胞相互作用是物种依赖的,影响先天免疫结果.
- *真菌细胞壁的组成是决定EV吸收和免疫调节的关键因素.
- *了解这些相互作用,可以了解宿主对各种真菌病原体的防御.
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