title: A cell surface ELISA to detect interleukin-4-induced class II MHC expression on murine B cells.
abstract: A sensitive cell surface ELISA is described to detect interleukin-4 (IL-4)-induced major histocompatibility complex class II expression on murine B cells. The ELISA is performed on B cells cultured for 16 h in the presence of purified IL-4 or T cell-derived supernatants. A sandwich technique employing a biotin-conjugated monoclonal anti-I-E antibody followed by avidin-conjugated alkaline phosphatase is used to detect enhanced I-E MHC antigen expression on the B cells. Detection of I-E induced by both purified IL-4 and a T cell-derived supernatant was highly reproducible and sensitive using this method. Other lymphokines were found to be negative for the induction of I-E. The assay is easily performed and many sample supernatants can be rapidly screened for IL-4 activity. In addition, a general method for the removal of endogenous inhibitors of lymphokines from complex supernatants is described.
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal; D000937:Antigen-Antibody Reactions; D001402:B-Lymphocytes / Q000276:immunology*; D001681:Biological Assay; D004306:Dose-Response Relationship, Immunologic; D004797:Enzyme-Linked Immunosorbent Assay; D005434:Flow Cytometry; D000949:Histocompatibility Antigens Class II / Q000032:analysis*; D007371:Interferon-gamma / Q000494:pharmacology; D007376:Interleukin-2 / Q000494:pharmacology; D015847:Interleukin-4; D007378:Interleukins / Q000032:analysis* / Q000037:antagonists & inhibitors / Q000276:immunology; D051379:Mice
chemical_list: D000911:Antibodies, Monoclonal; D000949:Histocompatibility Antigens Class II; D007376:Interleukin-2; D007378:Interleukins; D015847:Interleukin-4; D007371:Interferon-gamma