title: Effect of macrophages on interleukin-2 (IL-2)- and IL-4-induced murine lymphokine-activated killer activity.
abstract: The enhancing effect of macrophages on interleukin-2 (IL-2)- and IL-4-induced murine lymphokine-activated killer (LAK) activity was investigated in this study. Peritoneal macrophages significantly enhanced LAK activity generated from accessory cell-depleted splenic lymphocytes in both IL-2 and IL-4 cultures. This effect was dependent on the number of macrophages and was not replaced by a factor derived from macrophages or lymphocytes. Macrophages enhanced IL-2- and IL-4-induced LAK activity against both natural killer (NK)-sensitive (YAC-I, P388D1) and NK-resistant (P815) tumor cells. Negative selection of cells with antibodies and complement showed no differences in surface markers between IL-2 LAK effectors and IL-4 LAK effectors generated in the presence of macrophages. These results suggest that the same LAK effector subsets can be enhanced by macrophages in either IL-2 or IL-4 cultures.
authors.affiliation: First Department of Internal Medicine, Toyama Medical and Pharmaceutical University, Japan.
authors.forename: I S
authors.initials: IS
authors.lastname: Tunru
authors.forename: H
authors.initials: H
authors.lastname: Suzuki
authors.forename: S
authors.initials: S
authors.lastname: Yano
mesh_terms: D000818:Animals; D002450:Cell Communication; D002460:Cell Line; D003602:Cytotoxicity, Immunologic / Q000187:drug effects; D006801:Humans; D007376:Interleukin-2 / Q000494:pharmacology*; D015847:Interleukin-4 / Q000494:pharmacology*; D015979:Killer Cells, Lymphokine-Activated / Q000187:drug effects / Q000276:immunology*; D007700:Kinetics; D008213:Lymphocyte Activation / Q000187:drug effects; D008264:Macrophages / Q000276:immunology*; D008297:Male; D051379:Mice; D008809:Mice, Inbred C3H; D009374:Neoplasms, Experimental / Q000276:immunology; D011994:Recombinant Proteins / Q000494:pharmacology; D013154:Spleen / Q000276:immunology; D013755:Tetradecanoylphorbol Acetate / Q000494:pharmacology
chemical_list: D007376:Interleukin-2; D011994:Recombinant Proteins; D015847:Interleukin-4; D013755:Tetradecanoylphorbol Acetate