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© Research
Publication : Blood

Lack of endogenous TRIM5alpha-mediated restriction in rhesus macaque dendritic cells

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Blood - 14 Aug 2008

Arhel NJ, Nisole S, Carthagena L, Coutant F, Souque P, Brussel A, Estaquier J, Charneau P

Link to Pubmed [PMID] – 18703703

Blood 2008 Nov;112(9):3772-6

Rhesus macaques are resistant to infection by HIV-1 as a result of an innate cellular restriction mechanism attributable to the expression of rhTRIM5alpha, a member of the large tripartite motif (TRIM) protein family. TRIM5alpha-mediated restriction, which occurs before reverse transcription through targeting of the HIV-1 capsid, has been identified in a number of macaque primary cells and cell lines and is thought to occur in all macaque cell types. We report, however, that rhesus macaque dendritic cells (DCs) lack TRIM5alpha-mediated restriction and are equally permissive to HIV-1 infection as human DCs. Evidence suggests that, although TRIM5alpha RNA levels are normal in these cells, the protein may be dysfunctional. We propose that abrogation of TRIM5alpha-mediated restriction in DCs, although still operative in cells that replicate HIV-1 (macrophages, T lymphocytes), illustrates the need for innate mechanisms to not inhibit adaptive immune responses to ensure an optimal fight against pathogens.

http://www.ncbi.nlm.nih.gov/pubmed/18703703