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  • Title: Rat NGF receptor is recognized by the tumor-associated antigen monoclonal antibody 217c.
    Author: Ferrari G, Fabris M, Polato P, Skaper SD, Fiori MG, Yan Q.
    Journal: Exp Neurol; 1991 May; 112(2):183-94. PubMed ID: 1709875.
    Abstract:
    The expression of the epitope recognized by the tumor-associated antigen monoclonal antibody 217c increased on cultured rat Schwann cells with time. The same phenomenon has previously been reported for the rat nerve growth factor (NGF) receptor by using monoclonal antibody 192-IgG. The distribution of 217c antibody immunoreactivity closely paralleled that observed for NGF receptors on NGF-primed pheochromocytoma (PC12) cells in culture and a number of central neurons in vivo. Immunoprecipitation of affinity-labeled NGF receptors was used to examine whether these two antibodies shared common or unique antigens. Both the quantitative data and the electrophoretic mobility of the immunoprecipitated 125I-NGF/receptor complex indicate that the antigen recognized by the 217c mAb monoclonal antibody is, in fact, the NGF receptor. Furthermore, binding studies indicated that 192-IgG and 217c recognize different epitopes on the same molecule. The characterization of the 217c antibody should provide a valuable new tool in the study of NGF receptors.
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