title: The CD28/HLA-DR expressions on CD4+T but not CD8+T cells are significant predictors for progression to AIDS.
abstract: To investigate the changes of CD28 and HLA-DR molecules on CD4+ and CD8+ T cells during HIV infection, we classified 130 HIV-infected Koreans into four groups by the CD4 level as follows: group I (> or = 500 cells/mm3), group II (201-499 cells/mm3), group III (51-200 cells/mm3), and group IV (< or = 50 cells/mm3). In CD4+ T cells, the proportion of CD28 expression decreased significantly with the CD4 level while the proportion of HLA-DR expression increased gradually. In particular, the changes of HLA-DR expressions on CD4+ T cells were parallel to the loss of CD28 molecules from stage III to IV. However, the CD28 expression on CD8+ T cells decreased dramatically in the early stage of HIV infection, and the sum and pattern of CD28 and HLA-DR expressions on CD8+ T cells was stable after the first stage. Even though CD28 down-regulation on CD8+ T cells was very severe from the early stage of HIV infection, it might not influence the survival time of HIV-infected Koreans. The sum of the CD28+ subsets and HLA-DR subsets in each T cell was stable in all stages of disease progression. The sums of the CD28+ subsets and HLA-DR+ subsets in CD4+ T and CD8+ T cells were constant as approximately 100% and 55-60% of each T cell. These results suggested that the changes of CD28/HLA-DR expressions on CD4+ T cells were more predictable than those on CD8+ T cells in the evaluation of the disease progression during HIV-infected periods. However, we need further studies to understand why the sum of two molecules in each T cell are constant.
authors.affiliation: Centre for AIDS Research, Department of Virology, National Institute of Health, Seoul, Korea.
authors.forename: Byeong-Sun
authors.initials: BS
authors.lastname: Choi
authors.forename: Yong-Keun
authors.initials: YK
authors.lastname: Park
authors.forename: Joo-Shil
authors.initials: JS
authors.lastname: Lee
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000209:etiology / Q000276:immunology*; D000328:Adult; D000368:Aged; D015415:Biomarkers; D018106:CD28 Antigens / Q000096:biosynthesis / Q000276:immunology*; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology*; D018414:CD8-Positive T-Lymphocytes / Q000276:immunology*; D003430:Cross-Sectional Studies; D005260:Female; D015658:HIV Infections / Q000276:immunology*; D006684:HLA-DR Antigens / Q000096:biosynthesis / Q000276:immunology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D011379:Prognosis
chemical_list: D015415:Biomarkers; D018106:CD28 Antigens; D006684:HLA-DR Antigens