PMID- 23688318 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20140520 LR - 20211021 IS - 1476-9255 (Print) IS - 1476-9255 (Electronic) IS - 1476-9255 (Linking) VI - 10 DP - 2013 TI - Transient expansion of activated CD8(+) T cells characterizes tuberculosis-associated immune reconstitution inflammatory syndrome in patients with HIV: a case control study. PG - 21 LID - 10.1186/1476-9255-10-21 [doi] AB - BACKGROUND: CD4(+) T cell activation indicators have been reported to be a common phenomenon underlying diverse manifestations of immune reconstitution inflammatory syndrome (IRIS). However, we have found that a high frequency of circulating CD8(+) T cells is a specific risk factor for mycobacterial IRIS. Therefore, we investigated whether CD8(+) T cells from patients who develop TB IRIS were specifically activated. METHODS: We obtained PBMCs from HIV+ patients prior to and 4, 8, 12, 24, 52 and 104 weeks after initiating antiretroviral therapy. CD38 and HLADR expression on naive, central memory and effector memory CD8(+) and CD4(+) T cells were determined by flow cytometry. Absolute counts and frequencies of CD8(+) T cell subsets were compared between patients who developed TB IRIS, who developed other IRIS forms and who remained IRIS-free. RESULTS: TB IRIS patients showed significantly higher counts of naive CD8(+) T cells than the other groups at most time points, with a contraction of the effector memory subpopulation occurring later in the follow-up period. Activated (CD38(+) HLADR(+)) CD8(+) T cells from all groups decreased with treatment but transiently peaked in TB IRIS patients. This increase was due to an increase in activated naive CD8(+) T cell counts during IRIS. Additionally, the CD8(+) T cell subpopulations of TB IRIS patients expressed HLADR without CD38 more frequently and expressed CD38 without HLADR less frequently than cells from other groups. CONCLUSIONS: CD8(+) T cell activation is specifically relevant to TB IRIS. Different IRIS forms may involve different alterations in T cell subsets, suggesting different underlying inflammatory processes. FAU - Espinosa, Enrique AU - Espinosa E AD - Center for Infectious Diseases Research (CIENI), Instituto Nacional de Enfermedades Respiratorias "Ismael Cosio Villegas", Calzada de Tlalpan 4502, 14080 Mexico, D.F.Mexico. AD - Present address: Laboratorio de Inmunobiologia y Genetica, Instituto Nacional de Enfermedades Respiratorias "Ismael Cosio Villegas", Calzada de Tlalpan 4502, 14080 Mexico, D.F.Mexico. FAU - Romero-Rodriguez, Damaris P AU - Romero-Rodriguez DP AD - Center for Infectious Diseases Research (CIENI), Instituto Nacional de Enfermedades Respiratorias "Ismael Cosio Villegas", Calzada de Tlalpan 4502, 14080 Mexico, D.F.Mexico. AD - Present address: Laboratorio de Inmunobiologia y Genetica, Instituto Nacional de Enfermedades Respiratorias "Ismael Cosio Villegas", Calzada de Tlalpan 4502, 14080 Mexico, D.F.Mexico. FAU - Cantoral-Diaz, Maria-Teresa AU - Cantoral-Diaz MT AD - Center for Infectious Diseases Research (CIENI), Instituto Nacional de Enfermedades Respiratorias "Ismael Cosio Villegas", Calzada de Tlalpan 4502, 14080 Mexico, D.F.Mexico. FAU - Reyes-Teran, Gustavo AU - Reyes-Teran G AD - Center for Infectious Diseases Research (CIENI), Instituto Nacional de Enfermedades Respiratorias "Ismael Cosio Villegas", Calzada de Tlalpan 4502, 14080 Mexico, D.F.Mexico. LA - eng PT - Journal Article DEP - 20130520 PL - England TA - J Inflamm (Lond) JT - Journal of inflammation (London, England) JID - 101232234 PMC - PMC3679878 OTO - NOTNLM OT - Activation OT - CD8 T cells OT - HIV-1 OT - HIV-2 OT - Highly active anti-retroviral therapy (HAART) OT - Human immunodeficiency virus (AIDS) OT - Inflammation EDAT- 2013/05/22 06:00 MHDA- 2013/05/22 06:01 PMCR- 2013/05/20 CRDT- 2013/05/22 06:00 PHST- 2012/05/03 00:00 [received] PHST- 2013/05/13 00:00 [accepted] PHST- 2013/05/22 06:00 [entrez] PHST- 2013/05/22 06:00 [pubmed] PHST- 2013/05/22 06:01 [medline] PHST- 2013/05/20 00:00 [pmc-release] AID - 1476-9255-10-21 [pii] AID - 10.1186/1476-9255-10-21 [doi] PST - epublish SO - J Inflamm (Lond). 2013 May 20;10:21. doi: 10.1186/1476-9255-10-21. eCollection 2013.