title: Separation of IL-4 production from Th cell proliferation by an altered T cell receptor ligand.
abstract: In the presence of antigen presenting cells, a murine T helper (Th) cell specific for murine hemoglobin (Hb) responded to its immunogenic peptide by both cytokine (interleukin-4) secretion and proliferation. An altered Hb peptide with a single amino acid substitution induced only cytokine secretion and did not induce proliferation. Interleukin-1 costimulated and restored the Th proliferative response to normal levels. The altered peptide also supported cognate T cell-B cell interactions indicative of T cell helper function. Thus, this result suggests that the T cell receptor has the capacity of differential signaling.
authors.affiliation: Department of Pathology, Washington University School of Medicine, St. Louis, MO 63110.
authors.forename: B D
authors.initials: BD
authors.lastname: Evavold
authors.forename: P M
authors.initials: PM
authors.lastname: Allen
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D002455:Cell Division; D002999:Clone Cells; D006454:Hemoglobins / Q000737:chemistry / Q000276:immunology*; D015847:Interleukin-4 / Q000096:biosynthesis*; D008213:Lymphocyte Activation / Q000276:immunology*; D051379:Mice; D008969:Molecular Sequence Data; D010446:Peptide Fragments / Q000737:chemistry / Q000276:immunology*; D011948:Receptors, Antigen, T-Cell / Q000276:immunology / Q000378:metabolism*; D015398:Signal Transduction; D006377:T-Lymphocytes, Helper-Inducer / Q000166:cytology / Q000276:immunology*
chemical_list: D006454:Hemoglobins; D010446:Peptide Fragments; D011948:Receptors, Antigen, T-Cell; D015847:Interleukin-4