title: IL-16- and other CD4 ligand-induced migration is dependent upon protein kinase C.
abstract: Human interleukin-16, previously known as lymphocyte chemoattractant factor, is a CD4+ T cell competence growth factor initially described as a chemotactic factor for CD4+ cells. The interaction between IL-16 and its receptor CD4 leads to an increase in intracytoplasmic calcium and inositol triphosphate. Because of the association of intracellular shifts in protein kinase C (PKC) enzyme activity with production of these secondary messengers and the participation of PKC in transducing certain receptor-mediated migratory signals, we investigated the role of PKC in the CD4-mediated migratory response by IL-16. Recombinant IL-16 induces rapid translocation of PKC from the cytosol to the membrane in three separate CD4+ cell types: normal blood T cells, SUPT1 cells, and THP1 cells. PKC inhibitors H7, calphostin C, chelerythrine, and bisindolylmaleimide completely block IL-16-induced lymphocyte migration as well as the motile response induced by HIV-1 gp120 and anti-CD4 antibodies. Taken together, these data suggest a role for PKC in CD4-mediated migratory responses.
authors.affiliation: Department of Medicine, Pulmonary Center, Boston University School of Medicine, MA 02118, USA.
authors.forename: N A
authors.initials: NA
authors.lastname: Parada
authors.forename: W W
authors.initials: WW
authors.lastname: Cruikshank
authors.forename: H L
authors.initials: HL
authors.lastname: Danis
authors.forename: T C
authors.initials: TC
authors.lastname: Ryan
authors.forename: D M
authors.initials: DM
authors.lastname: Center
mesh_terms: D000911:Antibodies, Monoclonal / Q000276:immunology / Q000378:metabolism / Q000494:pharmacology; D015704:CD4 Antigens / Q000276:immunology / Q000378:metabolism* / Q000494:pharmacology*; D002460:Cell Line; D002465:Cell Movement / Q000187:drug effects*; D017868:Cyclic AMP-Dependent Protein Kinases / Q000037:antagonists & inhibitors; D004789:Enzyme Activation; D015699:HIV Envelope Protein gp120 / Q000494:pharmacology; D006801:Humans; D019410:Interleukin-16; D008222:Lymphokines / Q000378:metabolism / Q000494:pharmacology*; D011493:Protein Kinase C / Q000037:antagonists & inhibitors / Q000502:physiology*; D013601:T-Lymphocytes / Q000187:drug effects / Q000201:enzymology / Q000276:immunology*
chemical_list: D000911:Antibodies, Monoclonal; D015704:CD4 Antigens; D015699:HIV Envelope Protein gp120; D019410:Interleukin-16; D008222:Lymphokines; D017868:Cyclic AMP-Dependent Protein Kinases; D011493:Protein Kinase C