Abstract
Dissociation of colorectal tumor tissue directly obtained at surgery yields a cell suspension which contains tumor cells, leukocytes and erythrocytes. Coupling of a murine monoclonal antibody, HEA125, specific for human epithelial cells, to magnetic beads permits positive selection of a population containing essentially only tumor cells. Removal of cells from the beads is possible by papain treatment. Negative selection of tumor cells by means of beads coated with a leukocyte binding antibody offers no advantage since dead cells and erythrocytes remain.
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