title: OX40-Mediated cosignal enhances the maturation of naive human CD4+ T cells into high IL-4-producing effectors.
abstract: Our previous studies have indicated that naive human CD4+ T cells of neonatal or adult origin may be the initial source of IL-4 which is required for their development into Th2 effectors. In addition to minute amounts of IL-4, anti-CD3/B7.1-activated naive cells also release readily detectable levels of IL-13 and IFN-gamma. The production of IL-4 and IL-13 by naive T cells is differentially regulated by TGF-beta and IL-12. Shortly after activation, naive T cells express surface OX40, a TNF-R family member whose ligand (OX40L) is constitutively expressed on a subset of dendritic cells. Engagement of OX40 on activated naive T cells increases their expression of IL-4 and IL-13, suppresses that of IFN-gamma and promotes their development into Th2-like effectors.
authors.affiliation: Université de Montréal, Centre de recherche CHUM, Laboratoire de recherche en Allergie, Montréal, Que., Canada. delespeg@ere.umontreal.ca
authors.forename: G
authors.initials: G
authors.lastname: Delespesse
authors.forename: Y
authors.initials: Y
authors.lastname: Ohshima
authors.forename: L P
authors.initials: LP
authors.lastname: Yang
authors.forename: C
authors.initials: C
authors.lastname: Demeure
authors.forename: M
authors.initials: M
authors.lastname: Sarfati
mesh_terms: D000328:Adult; D015496:CD4-Positive T-Lymphocytes / Q000166:cytology / Q000276:immunology*; D002454:Cell Differentiation / Q000276:immunology; D006801:Humans; D015847:Interleukin-4 / Q000096:biosynthesis* / Q000276:immunology; D008024:Ligands; D008213:Lymphocyte Activation / Q000187:drug effects / Q000276:immunology*; D008562:Membrane Glycoproteins; D053278:OX40 Ligand; D018124:Receptors, Tumor Necrosis Factor / Q000276:immunology*; D018127:Tumor Necrosis Factor Receptor Superfamily, Member 7 / Q000276:immunology
chemical_list: D008024:Ligands; D008562:Membrane Glycoproteins; D053278:OX40 Ligand; D018124:Receptors, Tumor Necrosis Factor; C089251:TNFSF4 protein, human; D018127:Tumor Necrosis Factor Receptor Superfamily, Member 7; D015847:Interleukin-4