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The Journal of Immunology, Vol 141, Issue 8 2643-2650, Copyright © 1988 by American Association of Immunologists
ARTICLES |
RC Fuhlbrigge, KC Sheehan, RD Schreiber, DD Chaplin and ER Unanue
Department of Pathology, Washington University School of Medicine, St. Louis, MO 63110.
We report the production of hamster anti-murine IL-1 alpha mAb and analysis of their specificity and suitability for use in murine IL-1 immunologic and biologic assays. The mAb bound to murine (Mu) rIL-1 alpha 3 but not rMuIL-1 beta as assessed by both direct ELISA and immunoprecipitation. They also inhibited the biologic activity of MuIL- 1 alpha but not the activity of rMuIL-1 beta as measured in a T cell co- stimulator assay. These IL-1 alpha specific mAb only partially inhibited the co-stimulator activity found in macrophage culture supernatants but completely inhibited the co-stimulator activity of fixed peritoneal exudate cells. The data indicate that the species of IL-1 associated with murine macrophage membranes shares at least two epitopes with IL-1 alpha and probably represents a product of the IL-1 alpha gene. These reagents will be valuable for quantitative assessment of specific IL-1 proteins on cell surfaces, in culture supernatants, and in cell lysates. They will also be useful both in vitro and in vivo for determining the relative roles of the different IL-1 species in the development of biologic responses.
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