Abstract
Mouse hepatitis virus 3 (MHV3) infection of A/J and BALB/c mice has been used as a model of resistance/susceptibility. A/J mice recover from a mild disease after 4–6 days of infection and the BALB/c mice develop an acute hepatitis and die after 3–4 days of infection. In view of studying the MHV3 binding to cells or cell extracts, we performed an enzyme‐linked immunosorbent assay‐like virus‐binding assay, preparing microplates with L929 cells, A/J or BALB/c mouse macrophages and also with proteins extracted from these cells. Higher MHV3 bindings were observed to proteins of BALB/c macrophages than to the A/J ones. The interferon‐γ (IFN‐γ) activation led to a reduction of MHV3 binding only to proteins of resistant A/J mouse macrophages. Our experiments contribute to the hypothesis that IFN‐γ activation of macrophages plays an important role against MHV3 infection by downregulating the expression of viral receptors.
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