Immunological Determination of Labeling Index on Human Tumor Tissue Sections Using Monoclonal Anti-Brdurd Antibody

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Abstract
The use of a monoclonal antibody against the thymidine analogue bromodeoxyuridine together with an in vitro labeling technique allowed rapid determination of the labeling index in human tumors. The labeling index estimated by these relatively simple immunofluorexence or immunoenzymatic staining methods was equivalent to that obtained by autoradiography. The interpretation of the preparations is easy since there is a minimum of background staining. This immunohistochemical technique combined with in vitro labeling provides a suitable alternative for determining the labeling index of human tumors.