title: A new assay for interleukin-1 in the presence of interleukin-2.
abstract: A simple and reliable assay for interleukin-1 (IL-1) is described which has the advantage over other assays that it is independent of interleukin-2 (IL-2) production by the test cells. The assay makes possible the detection of IL-1 in the supernatants of T cell populations. The ability of IL-1 to induce IL-2 receptor expression in the absence of T cell mitogen is the basis of this assay. Thus, proliferation of mouse thymocytes incubated in the presence of saturating concentrations of IL-2 (10 U/ml) was directly dependent on the concentration of IL-1. The sensitivity of the assay is comparable to the sensitivity of the classical thymocyte co-stimulator assay. Natural and recombinant human and murine IL-1 were measured in this test system with comparable sensitivity.
mesh_terms: D000818:Animals; D001681:Biological Assay / Q000379:methods*; D002452:Cell Count; D004305:Dose-Response Relationship, Drug; D007375:Interleukin-1 / Q000032:analysis*; D007376:Interleukin-2 / Q000032:analysis* / Q000502:physiology; D008213:Lymphocyte Activation / Q000187:drug effects; D008297:Male; D051379:Mice; D008815:Mice, Inbred Strains; D010835:Phytohemagglutinins / Q000494:pharmacology; D011971:Receptors, Immunologic / Q000032:analysis; D015375:Receptors, Interleukin-2; D013045:Species Specificity; D013601:T-Lymphocytes / Q000276:immunology / Q000648:ultrastructure; D013950:Thymus Gland / Q000166:cytology; D013997:Time Factors
chemical_list: D007375:Interleukin-1; D007376:Interleukin-2; D010835:Phytohemagglutinins; D011971:Receptors, Immunologic; D015375:Receptors, Interleukin-2