PMID- 10608757 OWN - NLM STAT- MEDLINE DCOM- 20000303 LR - 20081121 IS - 0022-1899 (Print) IS - 0022-1899 (Linking) VI - 181 IP - 1 DP - 2000 Jan TI - Transient T cell receptor beta-chain variable region-specific expansions of CD4+ and CD8+ T cells during the early phase of pediatric human immunodeficiency virus infection: characterization of expanded cell populations by T cell receptor phenotyping. PG - 107-20 AB - T cell receptor (TCR) repertoire perturbations are commonly detected in CD8+ T cells during adult primary human immunodeficiency virus (HIV) infection and have been associated with HIV-specific cytotoxic T cell responses. By use of flow cytometry, transient high-level TCR beta-chain variable region-specific expansions of CD4+ and CD8+ T cells were observed more frequently in HIV-infected children than in children exposed to HIV who remained uninfected. TCR beta-chain diversity analysis and diversity-specific polymerase chain reaction were used to study the clonality of expanded CD4+ and CD8+ subsets. In CD8+ T cells, structural features of the complement-determining regions 3 were altered during the course of the expansion, and persistent TCR clonotypes were observed, consistent with antigen-driven selection. In contrast, TCR beta-chain variable region-specific expansions without clonotypic overrepresentation or persistence were observed in CD4+ T cells, possibly related to HIV-specific helper T cell responses or to the progressive destruction of the CD4+ cell compartment. FAU - Soudeyns, H AU - Soudeyns H AD - Laboratoire d'Immunologie, Institut de Recherches Cliniques de Montreal, McGill University, Montreal, Canada. hsoudeyns@justine.umontreal.ca FAU - Champagne, P AU - Champagne P FAU - Holloway, C L AU - Holloway CL FAU - Silvestri, G U AU - Silvestri GU FAU - Ringuette, N AU - Ringuette N FAU - Samson, J AU - Samson J FAU - Lapointe, N AU - Lapointe N FAU - Sekaly, R P AU - Sekaly RP LA - eng GR - AI-235516/AI/NIAID NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - J Infect Dis JT - The Journal of infectious diseases JID - 0413675 RN - 0 (Receptors, Antigen, T-Cell, alpha-beta) SB - IM MH - CD4-Positive T-Lymphocytes/immunology MH - CD8-Positive T-Lymphocytes/immunology MH - Child, Preschool MH - *Genes, T-Cell Receptor beta MH - HIV Infections/*immunology/transmission MH - HIV-1/*immunology MH - Humans MH - Infant MH - Infant, Newborn MH - Infectious Disease Transmission, Vertical MH - Longitudinal Studies MH - Lymphocyte Activation MH - Phenotype MH - Receptors, Antigen, T-Cell, alpha-beta/classification/*genetics MH - T-Lymphocyte Subsets/immunology MH - T-Lymphocytes/*immunology EDAT- 1999/12/23 09:00 MHDA- 2000/03/21 09:00 CRDT- 1999/12/23 09:00 PHST- 1999/12/23 09:00 [pubmed] PHST- 2000/03/21 09:00 [medline] PHST- 1999/12/23 09:00 [entrez] AID - JID990455 [pii] AID - 10.1086/315181 [doi] PST - ppublish SO - J Infect Dis. 2000 Jan;181(1):107-20. doi: 10.1086/315181.