title: Expression of CD69 on T-cell subsets in HIV-1 disease.
abstract: CD69 is the earliest activation marker newly synthesized and expressed during T lymphocyte activation. In this study, a whole-blood flow-cytometry-based assay was used to assess expression of the activation antigen CD69 on CD4 and CD8 T lymphocytes, and the co-expression of CD69 and CD28 on T cells. The expression of CD69 was studied in both unstimulated and in phytohaemagglutinin (PHA)- or anti-CD(3)/CD(28)-stimulated, 4-h culture, samples. The production of IL-2, IFN-gamma or both cytokines, in CD69(+) T cells, in response to Staphylococcus enterotoxin B was also tested. Fifty-three HIV-1-infected and 21 healthy volunteers participated in this study. In both PHA- and anti-CD(3)/CD(28)-stimulated cultures the percentage of CD69 on CD3(+)CD4(+) T cells was significantly lower in AIDS (and non-responders to HAART) versus healthy controls and the other HIV-1(+) groups. A decrease of CD69(+)CD28(+) T cells after PHA or MoAbs stimulation is noticed in AIDS. No difference in cytokine production was noticed between healthy volunteers and HIV-1(+) patients. Our results suggest that the expression of CD69 is affected only in the AIDS stage and in the non-responders to HAART patients.
authors.affiliation: Department of Immunology, Laiko General Hospital, Athens, Greece. pitsios@yahoo.com
authors.forename: C
authors.initials: C
authors.lastname: Pitsios
authors.forename: A
authors.initials: A
authors.lastname: Dimitrakopoulou
authors.forename: K
authors.initials: K
authors.lastname: Tsalimalma
authors.forename: T
authors.initials: T
authors.lastname: Kordossis
authors.forename: H
authors.initials: H
authors.lastname: Choremi-Papadopoulou
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000097:blood / Q000276:immunology*; D000328:Adult; D015703:Antigens, CD / Q000097:blood* / Q000378:metabolism; D000945:Antigens, Differentiation, T-Lymphocyte / Q000097:blood* / Q000378:metabolism; D018106:CD28 Antigens / Q000096:biosynthesis; D016516:CD4-CD8 Ratio; D005260:Female; D005434:Flow Cytometry; D015658:HIV Infections / Q000097:blood / Q000276:immunology*; D015497:HIV-1 / Q000276:immunology*; D006801:Humans; D007371:Interferon-gamma / Q000378:metabolism; D007376:Interleukin-2 / Q000378:metabolism; D037181:Lectins, C-Type; D008297:Male; D008875:Middle Aged; D016176:T-Lymphocyte Subsets / Q000276:immunology*; D000099192:CD69 Antigens
chemical_list: D015703:Antigens, CD; D000945:Antigens, Differentiation, T-Lymphocyte; D018106:CD28 Antigens; D007371:Interferon-gamma; D007376:Interleukin-2; D037181:Lectins, C-Type; D000099192:CD69 Antigens