title: Increase in percentage of CD45RO+/CD8+ cells is associated with previous severe primary HIV infection.
abstract: The purpose of the study was to examine how memory (CD45RO) and naive (CD45RA) phenotypes of CD4+ and CD8+ T-cell subpopulations changed with respect to progression and duration of human immunodeficiency virus (HIV) infection. Forty-three HIV-seropositive (HIV+) subjects with known time for seroconversion were included in this cross-sectional study. They were divided into the following groups for comparison: persons with and without AIDS, persons who had seroconverted > 72 and < 72 months before entering the study, persons with or without previous severe primary infection, persons who had developed AIDS > 72 and <72 months before entering the study. Furthermore, the HIV+ group was compared with an HIV-seronegative (HIV-) age- and sex-matched group. There was no difference in the proportion of total naive relative to total memory cells between HIV+ and HIV- subjects, showing an equal loss of naive and memory CD4+ cells in this study. Moreover, there was no difference in the proportion of total naive relative to memory CD8+ cells, showing an equal increase in both subgroups of CD8+ cells in HIV+ subjects. However, HIV+ subjects who had experienced severe primary symptoms resembled the AIDS group regarding shift in the CD8 phenotype from naive to memory and by down-regulation of amounts of CD45RA protein. Furthermore, the results showed that during infection with HIV the amounts of both CD45RA and CD45RO markers on CD4+ cells and CD45RA on CD8+ cells were down-regulated, although with different kinetics.(ABSTRACT TRUNCATED AT 250 WORDS)
authors.affiliation: Department of Infectious Diseases, Rigshospitalet, Copenhagen, Denmark.
authors.forename: H
authors.initials: H
authors.lastname: Bruunsgaard
authors.forename: C
authors.initials: C
authors.lastname: Pedersen
authors.forename: E
authors.initials: E
authors.lastname: Scheibel
authors.forename: B K
authors.initials: BK
authors.lastname: Pedersen
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000276:immunology* / Q000503:physiopathology; D000293:Adolescent; D000328:Adult; D000368:Aged; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology; D018414:CD8-Positive T-Lymphocytes / Q000166:cytology / Q000276:immunology*; D003430:Cross-Sectional Studies; D005260:Female; D005434:Flow Cytometry; D015658:HIV Infections / Q000276:immunology* / Q000503:physiopathology; D006679:HIV Seropositivity / Q000276:immunology* / Q000503:physiopathology; D015497:HIV-1; D006801:Humans; D016130:Immunophenotyping; D017493:Leukocyte Common Antigens / Q000276:immunology*; D018655:Lymphocyte Count; D008297:Male; D008875:Middle Aged
chemical_list: D017493:Leukocyte Common Antigens