Infection and persistence of rhesus monkey rhadinovirus in immortalized B-cell lines

Journal of Virology
John P BilelloR C Desrosiers

Abstract

Similar to its close relative human herpesvirus 8, rhesus monkey rhadinovirus (RRV) persists predominantly in B cells of its natural host. Rhesus monkey B-cell lines immortalized by the Epstein-Barr-related virus from rhesus monkeys (rhEBV) were used as targets for infection by RRV. These cultured B cells were susceptible to infection by RRV and continued to produce low titers of RRV for months of continuous culture. Infection by RRV did not detectably alter the growth rates of these B-cell lines when it was measured at standard or reduced serum concentrations. Depending on the cell line, 5 to 40% of the B cells stained positive for the RRV genome by fluorescence in situ hybridization (FISH). Most RRV-positive cells showed a fine punctate nuclear staining pattern consistent with latent infection, while a small minority of cells (0.2 to 1%) contained large, intensely staining nuclear foci consistent with productive, replicative infection. Greater than 90% of the cells were rhEBV genome positive in a pattern consistent with latent infection, and again only a small minority of cells showed a productive, replicative staining pattern. Dual, two-color FISH staining revealed coinfection of numerous cells with both RRV and rhEBV, but p...Continue Reading

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