title: Inhibition of T cell antigen receptor-dependent phosphorylation of CD4 in human immunodeficiency virus type 1 infected cells.
abstract: Inhibitory effects of human immunodeficiency virus (HIV) on T lymphocyte function have been linked to perturbation of signaling through the T cell antigen receptor-CD3 complex. Comparative biochemical analyses of signaling responses were performed in T cells that were either uninfected or chronically infected with the HIV-1/IIIB strain. Stimulation with antibodies to CD3 triggered both Ca2+ accumulation and phosphoinositide hydrolysis responses that were equivalent in uninfected and infected cells. Treatment with anti-CD3 or with phorbol diester also stimulated serine phosphorylation of CD4 molecules in uninfected T cells. However, phosphorylation of CD4 was not observed after anti-CD3 treatment in HIV-infected T cells despite normal phosphorylation responses to phorbol diester. Identical results were obtained using a T cell line that was infected with an env (gp160/120-) HIV-1 defective variant. These studies indicate that infection with HIV-1 inhibits the activation of protein kinase associated with the T cell receptor-CD3 complex by a mechanism which is independent of viral env protein components.
authors.affiliation: Department of Pathology, University of Pennsylvania, School of Medicine, Philadelphia, Pennsylvania 19104.
authors.forename: G N
authors.initials: GN
authors.lastname: Gaulton
authors.forename: L F
authors.initials: LF
authors.lastname: Brass
authors.forename: D
authors.initials: D
authors.lastname: Kozbor
authors.forename: C H
authors.initials: CH
authors.lastname: Pletcher
authors.forename: J A
authors.initials: JA
authors.lastname: Hoxie
mesh_terms: D000818:Animals; D000945:Antigens, Differentiation, T-Lymphocyte / Q000378:metabolism*; D017252:CD3 Complex; D015704:CD4 Antigens / Q000378:metabolism*; D002118:Calcium / Q000378:metabolism; D002460:Cell Line; D006224:Cricetinae; D004591:Electrophoresis, Polyacrylamide Gel; D004789:Enzyme Activation; D005434:Flow Cytometry; D015686:Gene Products, env / Q000378:metabolism; D015699:HIV Envelope Protein gp120 / Q000378:metabolism; D019302:HIV Envelope Protein gp160; D015497:HIV-1 / Q000235:genetics / Q000502:physiology*; D006801:Humans; D006868:Hydrolysis; D010641:Phenotype; D015240:Phorbol 12,13-Dibutyrate / Q000494:pharmacology; D010716:Phosphatidylinositols / Q000378:metabolism; D010766:Phosphorylation; D011233:Precipitin Tests; D011493:Protein Kinase C / Q000378:metabolism; D011498:Protein Precursors / Q000378:metabolism; D011948:Receptors, Antigen, T-Cell / Q000378:metabolism*; D015398:Signal Transduction; D013601:T-Lymphocytes / Q000276:immunology / Q000378:metabolism / Q000382:microbiology*
chemical_list: D000945:Antigens, Differentiation, T-Lymphocyte; D017252:CD3 Complex; D015704:CD4 Antigens; D015686:Gene Products, env; D015699:HIV Envelope Protein gp120; D019302:HIV Envelope Protein gp160; D010716:Phosphatidylinositols; D011498:Protein Precursors; D011948:Receptors, Antigen, T-Cell; D015240:Phorbol 12,13-Dibutyrate; D011493:Protein Kinase C; D002118:Calcium