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  • Title: Monoclonal antibodies specific for porcine monocytes/macrophages: macrophage heterogeneity in the pig evidenced by the expression of surface antigens.
    Author: Bullido R, Gómez del Moral M, Alonso F, Ezquerra A, Zapata A, Sánchez C, Ortuño E, Alvarez B, Domínguez J.
    Journal: Tissue Antigens; 1997 Apr; 49(4):403-13. PubMed ID: 9151393.
    Abstract:
    Macrophages are widely distributed in most tissues of the body, where they play important roles in host defense and repair of tissue damage. In this report we describe the production and characterization of a panel of six monoclonal antibodies (mAb) against porcine macrophages and their use for phenotyping tissue macrophages. All mAbs were produced by immunizing mice with porcine alveolar macrophages. Three of them (2A10/11, 3B11/11 and 3F7/11) react mainly with macrophages and, at a lower extent, blood monocytes, whereas the others (1E12/11, 2C12/10 and 4E9/11) also recognize granulocytes. Antigens recognized by these antibodies could be characterized by Western blot and/or immunoprecipitation, with the exception of that one recognized by 2C12/10. By their behavior in SDS-PAGE under reducing and nonreducing conditions, all seem to be single polypeptides, whose apparent molecular weight under reducing conditions are: 1E12/11 and 3B11/11 larger than 204 kDa; 2A10/11, 150 kDa; 4E9/11, 125-170 kDa; and 3F7/11, 135 kDa. Immunohistochemical analyses of both lymphoid and non-lymphoid organs using these mAbs reveal important antigenic heterogeneity among tissue macrophages. These mAbs are, therefore, useful tools for the study of porcine macrophage maturation and differentiation and for determining their heterogeneity both in normal and pathological conditions.
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