title: Production of CD8+ T cell nonlytic suppressive factors by CD28, CD38, and HLA-DR subpopulations.
abstract: HIV infection may be modified by CD8(+) T cells by the production of nonlytic antiviral factors. To determine subpopulations that mediate nonlytic, antiviral activity, we examined the production of beta chemokines and of CD8 antiviral factor (CAF) by different subsets, using CD8(+) cells derived from 24 HIV-1-infected and 25 uninfected individuals. Subjects with CD8(+) cell counts greater than 200/microl produced increased levels of MIP-1alpha by CD8(+)CD28(+), CD8(+)CD38(-), and CD8(+)HLA-DR(+) subsets as compared with uninfected controls. CD8(+)CD38(-) cells produced higher levels of MIP-1beta and RANTES. CAF production was increased by CD8(+)CD38(+) and CD8(+)HLA-DR(+) cells of HIV-infected individuals as compared with uninfected controls. Chemokine production was increased by cells that do not express activation markers, whereas CAF activity was increased by cells expressing CD38 or HLA-DR. These findings shed light on CD8(+) T cell noncytotoxic antiviral factor production during HIV infection.
authors.affiliation: Center for Molecular Medicine, Ottawa Health Research Institute, Ottawa, Ontario K1H 8L6, Canada.
authors.forename: Janina Q
authors.initials: JQ
authors.lastname: Jiang
authors.forename: Sowmya
authors.initials: S
authors.lastname: Balasubramanian
authors.forename: Nanci C
authors.initials: NC
authors.lastname: Hawley-Foss
authors.forename: Andrew D
authors.initials: AD
authors.lastname: Badley
authors.forename: Kenneth L
authors.initials: KL
authors.lastname: Rosenthal
authors.forename: Karen F T
authors.initials: KF
authors.lastname: Copeland
mesh_terms: D036541:ADP-ribosyl Cyclase / Q000378:metabolism*; D051997:ADP-ribosyl Cyclase 1; D000328:Adult; D015703:Antigens, CD / Q000378:metabolism*; D000998:Antiviral Agents / Q000378:metabolism; D018106:CD28 Antigens / Q000378:metabolism*; D018414:CD8-Positive T-Lymphocytes / Q000276:immunology / Q000378:metabolism*; D054405:Chemokine CCL3; D054407:Chemokine CCL4; D018946:Chemokine CCL5 / Q000378:metabolism; D018925:Chemokines / Q000378:metabolism; D015658:HIV Infections / Q000276:immunology*; D015497:HIV-1 / Q000276:immunology; D006684:HLA-DR Antigens / Q000378:metabolism*; D006801:Humans; D008213:Lymphocyte Activation; D019402:Macrophage Inflammatory Proteins / Q000378:metabolism; D008562:Membrane Glycoproteins; D008875:Middle Aged; D013491:Suppressor Factors, Immunologic / Q000378:metabolism*; D016176:T-Lymphocyte Subsets / Q000276:immunology / Q000378:metabolism*
chemical_list: D015703:Antigens, CD; D000998:Antiviral Agents; D018106:CD28 Antigens; D054405:Chemokine CCL3; D054407:Chemokine CCL4; D018946:Chemokine CCL5; D018925:Chemokines; D006684:HLA-DR Antigens; D019402:Macrophage Inflammatory Proteins; D008562:Membrane Glycoproteins; D013491:Suppressor Factors, Immunologic; D036541:ADP-ribosyl Cyclase; C498154:CD38 protein, human; D051997:ADP-ribosyl Cyclase 1