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• W2090947672 abstract "In a previous study we described a family of monoclonal antibodies directed against tracheal antigens having a variety of cellular and subcellular distributions. In the present study, we have extended our findings on four representative antibodies to determine the periodate sensitivity, glycosidase sensitivity, and apparent molecular weight of the corresponding antigens. Since mild periodate oxidation selectively cleaves carbohydrate moiety, leaving amino acids intact, loss of antigenicity following this treatment suggests the involvement of sugar residues in the antigenic determinant. This can be confirmed by testing the sensitivity of the antigens to specific glycosidases. By enzyme-linked immunosorbent assay (ELISA), all four antibodies were found to have highest affinity for void volume components isolated by Bio-Gel A15m chromatography of the total tracheal secretion. Further analysis of this void volume material by sodium dodecyl sulfate-polyacrylamide gel electrophoresis under reducing conditions followed by immunoblot analysis revealed that all antigens were carried by high-molecular-weight species (>200,000) which were periodate-Schiff positive but reacted poorly with Coomassie blue. In parallel experiments using (a) immunofluorescence and (b) ELISA, antibody binding was compared under control conditions and following periodate treatment of antigens under varying intensities (10 mm IO4−, 10 min, 4 °C; 50 mm IO4−, 1 h, 4 °C; 100 mm IO4−, 12 h, 20 °C). Similar results were obtained with the two methods, indicating a partial loss of antigenicity for one of the four antigens following the mildest periodate treatment, and total loss of antigenicity for all four antigens following each of the two prolonged treatments. All four antigens showed marked sensitivity to digestion with mixed exoglycosidases, and three antigens were also susceptible to endo-β-galactosidase digestion. Antigenicity was not decreased during incubation with chondroitinase ABC, heparitinase, or heparinase. Immunofluorescence analysis of tracheal tissue sections showed that the four antibodies recognized determinants in different locations, including gland and goblet cell cytoplasmic granules and the apical epithelial membrane. The characteristic immunofluorescence patterns of all antibodies were abolished by periodate incubation of the tracheal sections. Thus, the four antibodies appear to recognize carbohydrate antigens carried by high-molecular-weight glycoproteins, each with different cellular origins." @default.
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• W2090947672 date "1986-09-01" @default.
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• W2090947672 title "Tracheal carbohydrate antigens identified by monoclonal antibodies" @default.
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• W2090947672 doi "https://doi.org/10.1016/0003-9861(86)90012-3" @default.
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