PMID- 18161758 OWN - NLM STAT- MEDLINE DCOM- 20080321 LR - 20230112 IS - 0022-3417 (Print) IS - 0022-3417 (Linking) VI - 214 IP - 2 DP - 2008 Jan TI - Immune activation and inflammation in HIV-1 infection: causes and consequences. PG - 231-41 AB - Thorough research on HIV is progressively enabling us to understand the intricate mechanisms that link HIV-1 infection to the onset of immunodeficiency. The infection and depletion of CD4(+) T cells represent the most fundamental events in HIV-1 infection. However, in recent years, the role played by chronic immune activation and inflammation in HIV pathogenesis has become increasingly apparent: quite paradoxically, immune activation levels are directly associated with HIV-1 disease progression. In addition, HIV-1-infected patients present intriguing similarities with individuals of old age: their immune systems are characterized by a loss of regenerative capacity and an accumulation of ageing T cells. In this review, we discuss the potential reasons for the establishment of sustained immune activation and inflammation from the early stages of HIV-1 infection, as well as the long-term consequences of this process on the host immune system and health. A simplified model of HIV pathogenesis is proposed, which links together the three major facets of HIV-1 infection: the massive depletion of CD4(+) T cells, the paradoxical immune activation and the exhaustion of regenerative capacity. CI - 2007 Pathological Society of Great Britain and Ireland FAU - Appay, V AU - Appay V AD - Cellular Immunology Laboratory, INSERM U543, Hopital Pitie-Salpetriere, Universite Pierre et Marie Curie-Paris6, Paris, France. victor.appay@chups.jussieu.fr FAU - Sauce, D AU - Sauce D LA - eng PT - Journal Article PT - Review PL - England TA - J Pathol JT - The Journal of pathology JID - 0204634 SB - IM MH - Aging/immunology MH - CD4-Positive T-Lymphocytes/immunology MH - Disease Progression MH - HIV Infections/*immunology MH - *HIV-1 MH - Humans MH - Inflammation/*immunology MH - Lymphocyte Activation/*immunology MH - Models, Immunological RF - 149 EDAT- 2007/12/29 09:00 MHDA- 2008/03/22 09:00 CRDT- 2007/12/29 09:00 PHST- 2007/12/29 09:00 [pubmed] PHST- 2008/03/22 09:00 [medline] PHST- 2007/12/29 09:00 [entrez] AID - 10.1002/path.2276 [doi] PST - ppublish SO - J Pathol. 2008 Jan;214(2):231-41. doi: 10.1002/path.2276.