Murine norovirus-1 entry into permissive macrophages and dendritic cells is pH-independent.

Murine norovirus-1 entry into permissive macrophages and dendritic cells is pH-independent.
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DOI:
10.1016/j.virusres.2009.03.002
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发表时间:
2009-07
期刊:
影响因子:
5
通讯作者:
Wobus, Christiane E.
Wobus, Christiane E.
中科院分区:
医学3区
文献类型:
--
作者:
Perry, Jeffrey W.;Taube, Stefan;Wobus, Christiane E.

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小鼠诺如病毒(MNV)是近年来发现的一种小鼠病原体。与引起全世界绝大多数非细菌性胃肠炎的挑剔的人类诺如病毒不同,MNV容易感染培养物中的细胞。它在原代小鼠巨噬细胞和树突状细胞及其衍生细胞系中的复制首次允许研究诺如病毒的细胞进入。在这项研究中,我们确定了pH在MNV-1感染过程中的作用,因为内体的低pH环境通常会触发病毒的脱壳。我们证明,MNV-1病毒滴度的空斑试验和表达的非结构蛋白VPg的免疫荧光不受pH值的影响,在培养的和原代巨噬细胞和树突状细胞的存在下,两个已知的内体酸化抑制剂,巴弗洛霉素A1和氯喹。这些数据表明MNV-1以pH非依赖性方式进入容许细胞。
Murine norovirus (MNV) is a recently discovered mouse pathogen. Unlike the fastidious human noroviruses that cause the overwhelming majority of non-bacterial gastroenteritis worldwide, MNV readily infects cells in culture. Its replication in primary murine macrophages and dendritic cells and their derived cell lines allows the study of norovirus cell entry for the first time. In this study we determined the role of pH during MNV-1 infection since the low pH environment of endosomes often triggers uncoating of viruses. We demonstrated that MNV-1 viral titers by plaque assay and expression of the non-structural protein VPg by immunofluorescence were not affected by pH in cultured and primary macrophages and dendritic cells in the presence of two known endosome acidification inhibitors, bafilomycin A1 and chloroquine. These data indicate that MNV-1 enters permissive cells in a pH-independent manner.
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