Antigenic stimulation specifically reactivates the replication of archived simian immunodeficiency virus genomes in chronically infected macaques. - Institut Pasteur Accéder directement au contenu
Article Dans Une Revue Journal of Virology Année : 2005

Antigenic stimulation specifically reactivates the replication of archived simian immunodeficiency virus genomes in chronically infected macaques.

Résumé

Human immunodeficiency virus/simian immunodeficiency virus (SIV) diversification is a direct consequence of viral replication and occurs principally in secondary lymphoid organs where CD4(+) T cells are activated and proliferate. However, the evolution of viral quasispecies may also be driven by various nonexclusive mechanisms, including adaptation to specific immune responses and modification of viral fitness. Analysis of viral quasispecies in SIV-infected macaques subjected to repeated antigenic stimulations allowed us to demonstrate transient expansions of SIV populations that were highly dependent upon activation of antigen-specific T cells. T-cell clones expanded in response to a particular antigen were infected by a specific viral population and persisted for prolonged periods. Upon a second stimulation by encounter with the same antigen, these specific genomes were at the origin of a new burst of replication, leading to rapid but transient replacement of the viral quasispecies in blood. Finally, longitudinal analysis of SIV sequence variation during and between antigenic stimulations revealed that viral evolution is mostly constrained to periods of strong immunological activity.

Domaines

Virologie

Dates et versions

pasteur-00013749 , version 1 (10-11-2005)

Identifiants

Citer

Céline Renoux, Simon Wain-Hobson, Bruno Hurtrel, Rémi Cheynier. Antigenic stimulation specifically reactivates the replication of archived simian immunodeficiency virus genomes in chronically infected macaques.. Journal of Virology, 2005, 79 (17), pp.11231-8. ⟨10.1128/JVI.79.17.11231-11238.2005⟩. ⟨pasteur-00013749⟩

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