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Virology. 2007 Jun 5;362(2):257-70. Epub 2007 Feb 15.

In vitro characterization of primary SIVsmm isolates belonging to different lineages. In vitro growth on rhesus macaque cells is not predictive for in vivo replication in rhesus macaques.

Gautam R, Carter AC, Katz N, Butler IF, Barnes M, Hasegawa A, Ratterree M, Silvestri G, Marx PA, Hirsch VM, Pandrea I, Apetrei C.

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Division of Microbiology, Tulane National Primate Research Center, Covington, LA 70433, USA.

Abstract

We report in vitro characterization of 11 SIVsmm strains of six lineages co-circulating in naturally infected sooty mangabeys (SMs) from US Primate Centers and showed no major differences in the in vitro replication pattern between different SIVsmm lineages. Primary SIVsmm isolates utilized CCR5 and Bonzo co-receptors in vitro. SIVsmm growth in human T cell lines was isolate-, not lineage-specific, with poor replication on Molt4-Clone8, CEMss and PM1 cells and better replication on MT2, SupT1 and CEMx174 cells. All primary SIVsmm isolates replicated on SM and human PBMCs. In vitro replication in macaques varied widely, with moderate to high replication in pig-tailed macaque PBMCs, enhanced by CD8+ T cell depletion, and highly variable replication on rhesus macaque (Rh) PBMCs. Primary SIVsmm isolates replicated in Rh monocyte-derived dendritic cells (MDDCs) and monocyte-derived macrophages (MDMs). In vivo, SIVsmm isolates replicated at high levels in all SIVsmm-infected Rh. The poor in vitro replication of primary SIVsmm isolates in Rh cells did not correlate with in vivo replication, emphasizing the value of in vivo studies.

PMID:: 17303205; [PubMed - indexed for MEDLINE]
PMCID: PMC1936220

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