title: p38 mitogen-activated protein kinase regulates human T cell IL-5 synthesis.
abstract: Involvement of p38 mitogen-activated protein (MAP) kinase in human T cell cytokine synthesis was investigated. p38 MAP kinase was clearly induced in human Th cells activated through the TCR. SB203580, a highly selective inhibitor of p38 MAP kinase, inhibited the induction of p38 MAP kinase in human Th cells. Major T cell cytokines, IL-2, IL-4, IL-5, and IFN-gamma, were produced by Der f 2-specific Th clones upon stimulation through the TCR. IL-5 synthesis alone was significantly inhibited by SB203580 in a dose-dependent manner, whereas the production of IL-2, IL-4, and IFN-gamma was not affected. The proliferation of activated T cells was not affected. IL-5 synthesis of human Th clones induced upon stimulation with rIL-2, phorbol ester plus anti-CD28 mAb, and immobilized anti-CD3 mAb plus soluble anti-CD28 mAb was also suppressed by SB203580 in the same concentration response relationship. The results clearly indicated that IL-5 synthesis by human Th cells is dependent on p38 MAP kinase activity, and is regulated distinctly from IL-2, IL-4, and IFN-gamma synthesis. Selective control of IL-5 synthesis will provide a novel treatment devoid of generalized immune suppression for bronchial asthma and atopic dermatitis that are characterized by eosinophilic inflammation.
authors.affiliation: Clinical Research Center for Allergy and Rheumatology, National Sagamihara Hospital, Kanagawa, Japan. mori-kkr@umin.ac.jp
authors.forename: A
authors.initials: A
authors.lastname: Mori
authors.forename: O
authors.initials: O
authors.lastname: Kaminuma
authors.forename: K
authors.initials: K
authors.lastname: Miyazawa
authors.forename: K
authors.initials: K
authors.lastname: Ogawa
authors.forename: H
authors.initials: H
authors.lastname: Okudaira
authors.forename: K
authors.initials: K
authors.lastname: Akiyama
mesh_terms: D002999:Clone Cells / Q000187:drug effects / Q000201:enzymology / Q000276:immunology; D004789:Enzyme Activation / Q000276:immunology; D004791:Enzyme Inhibitors / Q000494:pharmacology; D006131:Growth Inhibitors / Q000494:pharmacology; D006801:Humans; D007093:Imidazoles / Q000494:pharmacology; D007166:Immunosuppressive Agents / Q000494:pharmacology; D007371:Interferon-gamma / Q000037:antagonists & inhibitors / Q000096:biosynthesis; D007376:Interleukin-2 / Q000037:antagonists & inhibitors / Q000096:biosynthesis; D015847:Interleukin-4 / Q000037:antagonists & inhibitors / Q000096:biosynthesis; D015848:Interleukin-5 / Q000037:antagonists & inhibitors / Q000096:biosynthesis* / Q000235:genetics; D047908:Intracellular Signaling Peptides and Proteins; D008213:Lymphocyte Activation / Q000187:drug effects / Q000276:immunology; D020928:Mitogen-Activated Protein Kinases / Q000037:antagonists & inhibitors / Q000502:physiology*; D016853:Muromonab-CD3 / Q000494:pharmacology; D017346:Protein Serine-Threonine Kinases / Q000378:metabolism; D011725:Pyridines / Q000494:pharmacology; D012333:RNA, Messenger / Q000037:antagonists & inhibitors / Q000096:biosynthesis; D013601:T-Lymphocytes / Q000166:cytology / Q000187:drug effects / Q000276:immunology; D006377:T-Lymphocytes, Helper-Inducer / Q000187:drug effects / Q000201:enzymology / Q000378:metabolism; D048051:p38 Mitogen-Activated Protein Kinases; D000099190:MAP-Kinase-Activated Kinase 2
chemical_list: D004791:Enzyme Inhibitors; D006131:Growth Inhibitors; D007093:Imidazoles; D007166:Immunosuppressive Agents; D007371:Interferon-gamma; D007376:Interleukin-2; D015847:Interleukin-4; D015848:Interleukin-5; D047908:Intracellular Signaling Peptides and Proteins; D020928:Mitogen-Activated Protein Kinases; D016853:Muromonab-CD3; D017346:Protein Serine-Threonine Kinases; D011725:Pyridines; D012333:RNA, Messenger; D048051:p38 Mitogen-Activated Protein Kinases; D000099190:MAP-Kinase-Activated Kinase 2; C093642:SB 203580