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Immunohistochemical demonstration and localization of Lewis a and Lewis b determinants in human urothelium

BR Juhl

In order to obtain baseline information about Lewis antigen expression in human urothelium in order that changes during malignant transformation can be evaluated, urothelium from eight individuals of known erythrocyte Lewis types were stained by a Tween-modified indirect immunoperoxidase staining technique using goat antibodies directed toward the Lewis a and Lewis b determinants and mouse monoclonal antibodies directed toward the Lewis a determinant in serial dilutions. To evaluate the value of the method for tissue Lewis typing, eleven ureters from individuals of unknown erythrocyte Lewis types were stained using goat antibodies. The Lewis antigens were located on the cell membranes and in the cytoplasm of urothelial cells. Goat antibodies identified Lea-b-, Lea+b+, and Lea+b- urothelium. Monoclonal antibodies identified urothelium with both low and high Lewis a antigen expression as well as urothelium with no Lewis a antigen expression. Urothelial Lewis antigen expression correlated with erythrocyte Lewis types in Lea-b+ and Lea+b- individuals. In Lea-b- individuals Lewis determinants were either not detected or were expressed similarly to Lea-b+ individuals. Urothelial Lewis typing were doubtful in two out of the eleven ureters examined. The results imply that knowledge about erythrocyte Lewis type or normal tissue Lewis antigen expression is necessary for the immunohistochemical evaluation of changes in Lewis antigen expression in urothelial tumors.

Volume 33, Issue 4, pp. 309-314, 04/01/1985
Copyright © 1985 by The Histochemical Society


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