title: Similarity of expression of activation markers and CD28 on gamma delta and alpha beta-receptor T cells in HIV infection.
abstract: During human immunodeficiency virus (HIV) infection, phenotypic analysis of circulating gamma delta+ T cells showed a downregulation of the CD28 surface antigen, as recently demonstrated for CD4+ and CD8+ alpha beta+ T cells. The downregulation of the CD28 molecule predominated on CD8+ gamma delta+ T cells. Moreover, an increased expression of CD38 and/or HLA-DR molecules was found on gamma delta T cells as reported for alpha beta T cells indicating that all categories of circulating T lymphocytes share similar phenotypic abnormalities in HIV-infected patients. These unique changes in the different T-cell subsets might be induced by sustained activation of the immune system or by the rapid turnover of T cells and argue for a global dysregulation of T lymphocytes during HIV infection.
authors.affiliation: Groupe de Recherche en Immunopathologie (Institut Fédératif de Recherche Multidisciplinaire sur les Peptides), CHU Charles Nicolle, Rouen, France.
authors.forename: F
authors.initials: F
authors.lastname: Jouen-Beades
authors.forename: D
authors.initials: D
authors.lastname: Gilbert
authors.forename: S
authors.initials: S
authors.lastname: Ramzaoui
authors.forename: F
authors.initials: F
authors.lastname: Borsa-Lebas
authors.forename: G
authors.initials: G
authors.lastname: Humbert
authors.forename: F
authors.initials: F
authors.lastname: Tron
mesh_terms: D036541:ADP-ribosyl Cyclase; D051997:ADP-ribosyl Cyclase 1; D015703:Antigens, CD; D000943:Antigens, Differentiation / Q000032:analysis; D000945:Antigens, Differentiation, T-Lymphocyte / Q000032:analysis*; D018106:CD28 Antigens / Q000032:analysis*; D005260:Female; D015658:HIV Infections / Q000276:immunology*; D006801:Humans; D016130:Immunophenotyping; D008297:Male; D008562:Membrane Glycoproteins; D009699:N-Glycosyl Hydrolases / Q000032:analysis; D016693:Receptors, Antigen, T-Cell, alpha-beta / Q000032:analysis*; D016692:Receptors, Antigen, T-Cell, gamma-delta / Q000032:analysis*; D016176:T-Lymphocyte Subsets / Q000737:chemistry / Q000276:immunology*
chemical_list: D015703:Antigens, CD; D000943:Antigens, Differentiation; D000945:Antigens, Differentiation, T-Lymphocyte; D018106:CD28 Antigens; D008562:Membrane Glycoproteins; D016693:Receptors, Antigen, T-Cell, alpha-beta; D016692:Receptors, Antigen, T-Cell, gamma-delta; D009699:N-Glycosyl Hydrolases; D036541:ADP-ribosyl Cyclase; C498154:CD38 protein, human; D051997:ADP-ribosyl Cyclase 1