一个对HIV-1的加密传感器激活了树突细胞中的抗病毒先天免疫力
Nicolas Manel1, Brandon Hogstad, Yaming Wang
1Molecular Pathogenesis Program, The Kimmel Center for Biology and Medicine of the Skirball Institute, New York University School of Medicine, New York, New York 10016, USA.
Nature
|September 11, 2010
概括
人类免疫缺陷病毒 (HIV) 引发了先天的抗病毒反应在树突细胞当感染是强制性的. 这种由HIV囊和环素A介导的反应突出了潜在的疫苗点.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 细胞生物学 细胞生物学
背景情况:
- 状细胞对于将先天性微生物检测与适应性免疫联系起来至关重要.
- 状细胞通常对人类免疫缺陷病毒 (HIV) 感染具有抵抗力,但可以促进T-辅助细胞感染.
- 树突细胞对HIV的细胞内在识别及其与抗病毒T细胞反应的联系仍然不清楚.
研究的目的:
- 为了研究树突细胞是否拥有HIV的内在模式识别受体.
- 为了确定由树突细胞识别HIV是否可以激活抗病毒T细胞反应.
- 阐明在树突细胞中HIV诱导的先天免疫反应背后的分子机制.
主要方法:
- 绕过树突细胞对HIV-1感染的抵抗力.
- 分析树突细胞成熟,I型干扰素反应和T细胞激活.
- 研究HIV-1囊与环素A (CYPA) 相互作用和IRF3激活的作用.
主要成果:
- 当树突细胞抵抗被克服时,HIV-1会诱导树突细胞成熟和I型抗病毒干扰素反应.
- 这种先天反应取决于新合成的HIV-1囊和细胞CYPA之间的相互作用,激活IRF3.
- 艾滋病毒-1囊形状似乎是在选择性压力下,通过CYPA相互作用平衡传染性和免疫逃避.
结论:
- 一个细胞内在的HIV-1传感器存在于树突细胞中,调解抗病毒免疫反应.
- 这种传感器通常不会被激活,因为树突细胞对艾滋病毒感染有抗性.
- 艾滋病毒-1的毒性可能源于逃避这种树突细胞介导的先天反应,这表明它是艾滋病毒疫苗的目标.
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