title: Functional impairment of CD4 T cells despite normalization of T cell number in HIV.
abstract: Using an in vitro model, we demonstrate that when CD4 T cells from HIV infected subjects are enriched from total blood lymphocytes the immune response to antigen is augmented. However, augmentation of this response is confined to HIV infected subjects with relatively preserved CD4 T cell counts. Enriching for CD4 T cells had no effect on antigen responses in patients with low CD4 lymphocyte counts. These findings support the concept that CD4 T cells in late stage HIV have inherent qualitative defects.
authors.affiliation: Pulmonary Division, Indiana University School of Medicine, Indianapolis, IN 46202, USA.
authors.forename: Kenneth S
authors.initials: KS
authors.lastname: Knox
authors.forename: Richard B
authors.initials: RB
authors.lastname: Day
authors.forename: Lisa M
authors.initials: LM
authors.lastname: Kohli
authors.forename: Chadi A
authors.initials: CA
authors.lastname: Hage
authors.forename: Homer L
authors.initials: HL
authors.lastname: Twigg
mesh_terms: D000328:Adult; D019380:Anti-HIV Agents / Q000494:pharmacology; D018791:CD4 Lymphocyte Count; D015496:CD4-Positive T-Lymphocytes / Q000187:drug effects / Q000276:immunology*; D049109:Cell Proliferation; D005260:Female; D015658:HIV Infections / Q000276:immunology*; D006801:Humans; D066298:In Vitro Techniques; D008213:Lymphocyte Activation / Q000187:drug effects / Q000276:immunology; D008297:Male; D015215:Zidovudine / Q000494:pharmacology
chemical_list: D019380:Anti-HIV Agents; D015215:Zidovudine