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  • Title: Identification of a macrophage-specific cell surface antigen.
    Author: Stinnett JD, Kaplan AM, Morahan PS.
    Journal: J Immunol; 1976 Feb; 116(2):273-8. PubMed ID: 55433.
    Abstract:
    A mouse-specific macrophage antigen (MSMA) was identified in NP-40 extracts of 125I-radiolabeled mouse preitoneal macrophages by using a rabbit anti-mouse macrophage serum (AMS) and SDS-polyacrylamide gel electrophoresis. The antigen was shown to have a m.w. of 83,000 daltons and was present on both normal and "activated" peritoneal macrophages. MSMA was also present on syngeneic adherent spleen cells, allogeneic peritoneal macrophages, a mouse macrophage cell line (P388D1), and exhibited some cross-reactivity with peritoneal macrophages from closely related species (rats and hamsters). MSMA was not present on nonadherent peritoneal exudate cells, spleen cells, erythrocytes, thymocytes, or bone marrow cells. Extensive absorptions of AMS with thymocytes and erytrocytes from mice were necessary to remove other antibodies that reacted with other mouse membrane antigens. An antiserum directed against a specific membrane antigen has great potential in elucidating structure-function relationships with regard to a number of macrophage activities.
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