title: B cell stimulatory factor 1 (IL-4) enhances the development of cytotoxic T cells from Lyt-2+ resting murine T lymphocytes.
abstract: B cell stimulatory factor 1 (BSF-1) (IL-4) was shown to synergize with phorbol esters or with monoclonal anti-TCR antibody in stimulation of the development of CTL from small resting murine T cells. IL-2 also synergized with PMA in such differentiation but was less effective than BSF-1. The combination of these two lymphokines with PMA had the most potent effect on the development of CTL. BSF-1 plus PMA stimulated a significant increase in the intracellular content of N-benzyloxycarbonyl-L-lysine thiobenzylester esterase, a granule-associated biochemical marker, whereas IL-2 plus PMA was only marginally effective. Depletion of L3T4+ cells did not result in the abrogation of these effects. Lyt-2+ T cells that were incubated for 72 h with BSF-1 plus PMA accumulated N-benzyloxycarbonyl-L-lysine thiobenzylester esterase and secreted this intragranular marker after interaction with immobilized anti-T cell receptor mAb. These BSF-1/PMA-stimulated Lyt-2+, L3T4- T cells were also able to kill FcR positive target cells in a retargeting assay with a mAb to murine T3 Ag, providing evidence that BSF-1 plus PMA acted directly on precursors of cytotoxic T cells.
authors.affiliation: Laboratory of Immunology, National Institute of Allergy and Infectious Diseases, Bethesda, MD 20892.
authors.forename: G
authors.initials: G
authors.lastname: Trenn
authors.forename: H
authors.initials: H
authors.lastname: Takayama
authors.forename: J
authors.initials: J
authors.lastname: Hu-Li
authors.forename: W E
authors.initials: WE
authors.lastname: Paul
authors.forename: M V
authors.initials: MV
authors.lastname: Sitkovsky
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology; D000950:Antigens, Ly / Q000032:analysis; D002454:Cell Differentiation / Q000187:drug effects; D003602:Cytotoxicity, Immunologic / Q000187:drug effects; D004357:Drug Synergism; D005260:Female; D053804:Granzymes; D007376:Interleukin-2 / Q000494:pharmacology; D015847:Interleukin-4; D007378:Interleukins / Q000494:pharmacology*; D051379:Mice; D008807:Mice, Inbred BALB C; D011948:Receptors, Antigen, T-Cell / Q000276:immunology; D012697:Serine Endopeptidases / Q000032:analysis / Q000378:metabolism; D013601:T-Lymphocytes / Q000166:cytology / Q000187:drug effects* / Q000378:metabolism; D013602:T-Lymphocytes, Cytotoxic / Q000166:cytology*; D013755:Tetradecanoylphorbol Acetate / Q000494:pharmacology
chemical_list: D000911:Antibodies, Monoclonal; D000950:Antigens, Ly; D007376:Interleukin-2; D007378:Interleukins; D011948:Receptors, Antigen, T-Cell; D015847:Interleukin-4; D053804:Granzymes; D012697:Serine Endopeptidases; D013755:Tetradecanoylphorbol Acetate