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J Gen Virol. 2005 Jan;86(Pt 1):31-40.

Murine gammaherpesvirus 68 bcl-2 homologue contributes to latency establishment in vivo.

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Division of Virology, Department of Pathology, University of Cambridge, Tennis Court Road, Cambridge CB2 1QP, UK.


The gammaherpesviruses are characteristically latent in lymphocytes and exploit lymphocyte proliferation to establish a large, persistent pool of latent genomes. Murine gammaherpesvirus 68 (MHV-68) allows the in vivo analysis of viral genes that contribute to this and other aspects of host colonization. In this study, the MHV-68 bcl-2 homologue, M11, was disrupted either in its BH1 homology domain or upstream of its membrane-localizing C-terminal domain. Each M11 mutant showed normal lytic replication in vitro and in vivo, but had a reduction in peak splenic latency. Lower infectious-centre titres correlated with lower in vivo B-cell activation, lower viral genome loads and reduced viral tRNA expression. This was therefore a true latency deficit, rather than a deficit in ex vivo reactivation. Stable, long-term levels of splenic latency were normal. M11 function therefore contributed specifically to viral latency amplification in infected lymphoid tissue.

[Indexed for MEDLINE]

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