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Updated: Jun 28, 2026

Passive Administration of Monoclonal Antibodies Against H. capsulatum and Others Fungal Pathogens

Passive Administration of Monoclonal Antibodies Against H. capsulatum and Others Fungal Pathogens

Published on: February 14, 2011

铜排泄对Histoplasma capsulatum病毒性的影响

Dayane Moraes¹, Gabriel Brum Tristão¹, Chad A Rappleye²

¹Laboratório de Biologia Molecular (LBM), Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Brazil.

The FEBS journal

|November 11, 2023

概括

血清囊体在感染期间会在宿主巨细胞中遇到有毒的铜水平. 这种真菌利用像CRP1这样的铜排泄来排毒铜,并建立感染.

科学领域:

医学真菌学医学真菌学
宿主-病原体相互作用
传染性疾病传染性疾病

背景情况:

病原菌需要宿主营养,包括铜,才能生存.
高度的铜是有毒的,宿主使用铜毒性作为防御机制.
海斯托囊体 (H. capsulatum) 是一种导致感染的真菌病原体.

研究的目的:

为了研究铜在H. capsulatum巨细胞感染中的作用.
为了确定H. capsulatum在天生的免疫反应期间对铜暴露的反应.
评估铜解毒机制对真菌毒性的贡献.

主要方法:

对暴露于铜和巨细胞内的H. capsulatum的转录分析.
在H. capsulatum.中对铜载体 (CRP1和ATP7a) 的基因沉默.
基于巨菌的真菌生长分析 (细胞系和初级细胞).
鼠感染模型用于评估真菌负担和毒性.

主要成果:

囊菌在富含铜的环境和巨细胞内部上调CRP1 (铜排泄).
具有高铜水平的巨细胞对H. capsulatum生长的控制有所增强.
抑制ATP7a (铜流量) 增加了巨细胞中的真菌生存率.
抑制CRP1可以降低小鼠的真菌负担,并减轻巨细胞模型中的毒性.
CRP1诱导独立于IFN-γ发生,这表明早期的先天性免疫暴露于铜.

结论:

在巨细胞中感染的早期阶段,H. capsulatum暴露在富含铜的环境中.
这种真菌使用铜解毒系统,特别是CRP1,以抵消宿主铜介导的防御.
CRP1对于H. capsulatum的毒性至关重要,使其能够克服铜毒性并建立感染.

关键词:

铜排毒铜排毒铜排毒在真菌感染期间铜的动态.铜的恒常性是铜的恒常性.营养免疫力营养免疫力

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