title: Regulatory roles of IL-2 and IL-4 in H4/inducible costimulator expression on activated CD4+ T cells during Th cell development.
abstract: We found a tight correlation among the levels of H4/inducible costimulator (ICOS) expression, IL-4 production, and GATA-3 induction, using activated CD4(+) T cells obtained from six different murine strains. BALB/c-activated CD4(+) T cells expressed approximately 10-fold more H4/ICOS on their surfaces and produced approximately 10-fold more IL-4 upon restimulation than C57BL/6-activated CD4(+) T cells. BALB/c naive CD4(+) T cells were shown to produce much higher amounts of IL-2 and IL-4 upon primary stimulation than C57BL/6 naive CD4(+) T cells. Neutralization of IL-4 with mAbs in culture of BALB/c naive CD4(+) T cells strongly down-regulated both H4/ICOS expression on activated CD4(+) T cells and IL-4 production upon subsequent restimulation. Conversely, exogenous IL-4 added to the culture of BALB/c or C57BL/6 naive CD4(+) T cells up-regulated H4/ICOS expression and IL-4 production upon restimulation. In addition, retroviral expression of GATA-3 during the stimulation of naive CD4(+) T cells from C57BL/6 or IL-4(-/-) mice increased H4/ICOS expression on activated CD4(+) T cells. A similar effect of IL-2 in the primary culture of BALB/c naive CD4(+) T cells appeared to be mediated by IL-4, the production of which was regulated by IL-2. These data suggest that IL-4 induced by IL-2 is critical to the maintenance of high H4/ICOS expression on BALB/c-activated CD4(+) T cells.
authors.affiliation: Department of Microbiology and Immunology, Tokyo Women's Medical University School of Medicine, Tokyo, Japan. jyagi1@research.twmu.ac.jp
authors.forename: Junji
authors.initials: J
authors.lastname: Yagi
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Arimura
authors.forename: Umberto
authors.initials: U
authors.lastname: Dianzani
authors.forename: Toshimitsu
authors.initials: T
authors.lastname: Uede
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Okamoto
authors.forename: Takehiko
authors.initials: T
authors.lastname: Uchiyama
mesh_terms: D000818:Animals; D000945:Antigens, Differentiation, T-Lymphocyte / Q000096:biosynthesis*; D018122:B7-1 Antigen / Q000096:biosynthesis*; D018106:CD28 Antigens / Q000502:physiology; D015496:CD4-Positive T-Lymphocytes / Q000166:cytology / Q000276:immunology* / Q000378:metabolism*; D002454:Cell Differentiation / Q000276:immunology; D002478:Cells, Cultured; D004268:DNA-Binding Proteins / Q000096:biosynthesis / Q000235:genetics / Q000502:physiology; D004306:Dose-Response Relationship, Immunologic; D015536:Down-Regulation / Q000276:immunology; D005260:Female; D050990:GATA3 Transcription Factor; D005822:Genetic Vectors; D060889:Inducible T-Cell Co-Stimulator Protein; D007376:Interleukin-2 / Q000096:biosynthesis / Q000502:physiology*; D015847:Interleukin-4 / Q000096:biosynthesis / Q000494:pharmacology / Q000502:physiology*; D007399:Interphase / Q000276:immunology; D008213:Lymphocyte Activation / Q000276:immunology*; D051379:Mice; D008807:Mice, Inbred BALB C; D008809:Mice, Inbred C3H; D008810:Mice, Inbred C57BL; D008808:Mice, Inbred CBA; D008822:Mice, Transgenic; D012190:Retroviridae / Q000235:genetics; D013045:Species Specificity; D018417:Th1 Cells / Q000166:cytology / Q000276:immunology / Q000378:metabolism; D018418:Th2 Cells / Q000166:cytology / Q000276:immunology / Q000378:metabolism; D015534:Trans-Activators / Q000096:biosynthesis / Q000235:genetics / Q000502:physiology; D015854:Up-Regulation / Q000235:genetics / Q000276:immunology; D060907:V-Set Domain-Containing T-Cell Activation Inhibitor 1
chemical_list: D000945:Antigens, Differentiation, T-Lymphocyte; D018122:B7-1 Antigen; D018106:CD28 Antigens; D004268:DNA-Binding Proteins; D050990:GATA3 Transcription Factor; C494748:Gata3 protein, mouse; C556694:Icos protein, mouse; D060889:Inducible T-Cell Co-Stimulator Protein; D007376:Interleukin-2; D015534:Trans-Activators; D060907:V-Set Domain-Containing T-Cell Activation Inhibitor 1; C475824:Vtcn1 protein, mouse; D015847:Interleukin-4