Summary
Two new monoclonal antibodies, EBU-65 and EBU-141, were raised by immunization with plasma cell line U-266. Both antibodies strongly react with B lymphocytes in immunofluorescent staining as well as on paraffin-embedded sections. More than 200 leukemias and lymphomas were tested, and for both antibodies reactivity was found only with “mature” B-cell tumors but not with precursor B-cell leukemias. None of the non-B-lineage hematolymphatic tumors tested was stained by EBU-141 or EBU-65. A subpopulation of T lymphocytes particularly present in nonmalignant pleural effusions was detected by EBU-65 additionally. Although EBU-141 was clustered as CDw75 and EBU-65 as “unique,” a close relationship of the staining pattern was found and both antibodies react with a sialyltransferase. In particular, CDw75 antibody EBU-141 was demonstrated to be very useful for immunophenotyping of B-cell neoplasias, while EBU-65 reacted with most multiple myelomas and a subgroup of “activated”-appearing T cells.
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This work was supported by the J. and F. Marohn Foundation
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Gramatzki, M., Burger, R., Kraus, J. et al. Monoclonal antibodies EBU-141 (CDw75) and EBU-65 allow reliable distinction between mature and pre-B-cell tumors in suspension and on tissue sections. Ann Hematol 63, 20–26 (1991). https://doi.org/10.1007/BF01714956
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DOI: https://doi.org/10.1007/BF01714956