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树突状细胞在人巨细胞病毒感染中的作用

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摘要 人巨细胞病毒(human cytomegalovirus,HCMV)在人群中感染率极高,通过多种免疫逃避机制,实现在宿主体内的长期潜伏感染。树突状细胞(dendritic cells,DC)是重要的抗原提呈细胞,在诱导和维持特异性免疫应答中发挥重要的作用。人体内的DC根据来源、表型分为两群:髓系DC(myeloid DC,mDC)和浆细胞样DC(plasmacytoid DC,pDC),大量研究证实HCMV介导的多种免疫逃避机制中,部分是通过影响DC功能实现的。HCMV不仅可以感染mDC,影响mDC表型、迁移、分泌细胞因子、激活T细胞功能,而且还可以抑制pDC分泌干扰素水平及激活T细胞能力,并且激活过度的B细胞反应,导致机体抗病毒细胞免疫反应的抑制和体液免疫紊乱,实现病毒长期潜伏感染。本文主要讨论HCMV是如何改变两种DC亚型的功能以实现免疫逃避目的。
作者 刘杨 方峰
出处 《现代免疫学》 CAS CSCD 北大核心 2012年第1期84-87,共4页 Current Immunology
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