@article{mbs:/content/journal/jgv/10.1099/jgv.0.001414, author = "Zadeh, Vahid Rajabali and Urata, Shuzo and Sakaguchi, Miako and Yasuda, Jiro", title = "Human BST-2/tetherin inhibits Junin virus release from host cells and its inhibition is partially counteracted by viral nucleoprotein", journal= "Journal of General Virology", year = "2020", volume = "101", number = "6", pages = "573-586", doi = "https://doi.org/10.1099/jgv.0.001414", url = "https://www.microbiologyresearch.org/content/journal/jgv/10.1099/jgv.0.001414", publisher = "Microbiology Society", issn = "1465-2099", type = "Journal Article", keywords = "Arenaviridae", keywords = "human BST-2", keywords = "Tetherin", keywords = "innate immunity", keywords = "Junin virus", abstract = "Bone marrow stromal cell antigen-2 (BST-2), also known as tetherin, is an interferon-inducible membrane-associated protein. It effectively targets enveloped viruses at the release step of progeny viruses from host cells, thereby restricting the further spread of viral infection. Junin virus (JUNV) is a member of Arenaviridae, which causes Argentine haemorrhagic fever that is associated with a high rate of mortality. In this study, we examined the effect of human BST-2 on the replication and propagation of JUNV. The production of JUNV Z-mediated virus-like particles (VLPs) was significantly inhibited by over-expression of BST-2. Electron microscopy analysis revealed that BST-2 functions by forming a physical link that directly retains VLPs on the cell surface. Infection using JUNV showed that infectious JUNV production was moderately inhibited by endogenous or exogenous BST-2. We also observed that JUNV infection triggers an intense interferon response, causing an upregulation of BST-2, in infected cells. However, the expression of cell surface BST-2 was reduced upon infection. Furthermore, the expression of JUNV nucleoprotein (NP) partially recovered VLP production from BST-2 restriction, suggesting that the NP functions as an antagonist against antiviral effect of BST-2. We further showed that JUNV NP also rescued the production of Ebola virus VP40-mediated VLP from BST-2 restriction as a broad spectrum BST-2 antagonist. To our knowledge, this is the first report showing that an arenavirus protein counteracts the antiviral function of BST-2.", }