کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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3425397 | 1227281 | 2010 | 6 صفحه PDF | دانلود رایگان |

Murine gammaherpesvirus-68 (MHV68) is genetically related to human Epstein–Barr virus and Kaposi's sarcoma-associated herpesvirus and provides a tractable model to study gammaherpesvirus–host interactions in vivo and in vitro. The MHV68-encoded v-RCA product inhibits murine complement activation and shares sequence homology with other virus and host regulators of complement activation. Here we show that v-RCA is required for efficient MHV68 replication in primary murine macrophages, but not in murine embryonic fibroblasts. v-RCA-deficient MHV68 mutant viruses display defects in viral DNA synthesis in infected macrophages. Importantly, attenuated growth of v-RCA mutant viruses is not rescued in macrophages lacking critical components of the complement system including C3, indicating that the macrophage-specific role of v-RCA in MHV68 replication is complement-independent. This contrasts with the situation in vivo in which attenuated neurovirulence of v-RCA mutant viruses is rescued in C3-deficient mice. This study shows a novel, complement independent cell-type-specific function of a gammaherpesvirus RCA protein.
Journal: Virology - Volume 396, Issue 2, 20 January 2010, Pages 323–328