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Autocrine Interferon Priming in Macrophages but Not Dendritic Cells Results in Enhanced Cytokine and Chemokine Production after Coronavirus Infection
Journal article   Open access

Autocrine Interferon Priming in Macrophages but Not Dendritic Cells Results in Enhanced Cytokine and Chemokine Production after Coronavirus Infection

Haixia Zhou, Jincun Zhao and Stanley Perlman
mBio, Vol.1(4), pp.e00219-e00219
10/19/2010
DOI: 10.1128/mBio.00219-10
PMCID: PMC2957079
PMID: 20978536
url
https://doi.org/10.1128/mBio.00219-10View
Published (Version of record) Open Access

Abstract

Coronaviruses efficiently inhibit interferon (IFN) induction in nonhematopoietic cells and conventional dendritic cells (cDC). However, IFN is produced in infected macrophages, microglia, and plasmacytoid dendritic cells (pDC). To begin to understand why IFN is produced in infected macrophages, we infected bone marrow-derived macrophages (BMM) and as a control, bone marrow-derived DC (BMDC) with the coronavirus mouse hepatitis virus (MHV). As expected, BMM but not BMDC expressed type I IFN. IFN production in infected BMM was nearly completely dependent on signaling through the alpha/beta interferon (IFN-α/β) receptor (IFNAR). Several IFN-dependent cytokines and chemokines showed the same expression pattern, with enhanced production in BMM compared to BMDC and dependence upon signaling through the IFNAR. Exogenous IFN enhanced IFN-dependent gene expression in BMM at early times after infection and in BMDC at all times after infection but did not stimulate expression of molecules that signal through myeloid differentiation factor 88 (MyD88), such as tumor necrosis factor (TNF). Collectively, our results show that IFN is produced at early times postinfection (p.i.) in MHV-infected BMM, but not in BMDC, and primes expression of IFN and IFN-responsive genes. Further, our results also show that BMM are generally more responsive to MHV infection, since MyD88-dependent pathways are also activated to a greater extent in these cells than in BMDC.
Cell Line Dendritic Cells - immunology Humans Mice, Inbred C57BL Cells, Cultured Interferons - immunology Coronavirus Infections - immunology Murine hepatitis virus - physiology Coronavirus - immunology Mice, Knockout Murine hepatitis virus - immunology Animals Macrophages - virology Coronavirus Infections - virology Mice Dendritic Cells - virology Coronavirus - physiology Macrophages - immunology Chemokines - immunology Cytokines - immunology

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