title: Direct evidence that ERK regulates the production/secretion of interleukin-2 in PHA/PMA-stimulated T lymphocytes.
abstract: Although p21ras, raf-1 and MEK have been shown to regulate directly the transcriptional activity of NFAT (nuclear factor of activated T cells) and/or the interleukin-2 (IL-2) promoter, direct evidence that the extracellular signal-regulated protein kinase (ERK) is involved in regulating IL-2 production is still lacking. Here, we demonstrate that transfection of Jurkat cells with a dominant negative mutant of ERK1 (Erk1-K71R) resulted in the suppression of mitogen-stimulated production/secretion of IL-2. This was accompanied by a parallel inhibition of mitogen-stimulated ERK activity. These data provide direct evidence, for the first time, that ERK plays a vital role in regulating the production/secretion of IL-2.
authors.affiliation: Department of Immunopathology, Womens' and Children's Hospital, North Adelaide, Australia.
authors.forename: Y Q
authors.initials: YQ
authors.lastname: Li
authors.forename: C S
authors.initials: CS
authors.lastname: Hii
authors.forename: C J
authors.initials: CJ
authors.lastname: Der
authors.forename: A
authors.initials: A
authors.lastname: Ferrante
mesh_terms: D015153:Blotting, Western; D017871:Calcium-Calmodulin-Dependent Protein Kinases / Q000276:immunology* / Q000378:metabolism; D006801:Humans; D007376:Interleukin-2 / Q000378:metabolism*; D008213:Lymphocyte Activation / Q000276:immunology*; D048052:Mitogen-Activated Protein Kinase 3; D020928:Mitogen-Activated Protein Kinases; D010835:Phytohemagglutinins / Q000276:immunology; D013601:T-Lymphocytes / Q000276:immunology*; D013755:Tetradecanoylphorbol Acetate / Q000276:immunology; D014162:Transfection; D014407:Tumor Cells, Cultured
chemical_list: D007376:Interleukin-2; D010835:Phytohemagglutinins; D017871:Calcium-Calmodulin-Dependent Protein Kinases; D048052:Mitogen-Activated Protein Kinase 3; D020928:Mitogen-Activated Protein Kinases; D013755:Tetradecanoylphorbol Acetate