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  • Title: Elimination of leukemic cells from human bone marrow using monoclonal antibody and complement.
    Author: Bast RC, Ritz J, Lipton JM, Feeney M, Sallan SE, Nathan DG, Schlossman SF.
    Journal: Cancer Res; 1983 Mar; 43(3):1389-94. PubMed ID: 6337707.
    Abstract:
    Human leukemic cells which bear the common acute lymphoblastic leukemia antigen can be lysed with a murine monoclonal antibody (J-5) in the presence of rabbit complement. Conditions have been defined for eliminating 51Cr-labeled common acute lymphoblastic leukemia antigen-positive NALM-1 cells or cryopreserved leukemic lymphoblasts from a 100-fold excess of human bone marrow. Optimal lysis is obtained with treatment for a total of 90 min. Three treatments for 30 min are more effective than two treatments for 45 min or one treatment for 90 min. Separation of marrow on a Ficoll:diatrizoate gradient does not permit more effective elimination of leukemic cells. Tumor cell lysis is inhibited by high concentrations of common acute lymphoblastic leukemia antigen-positive cells (2 X 10(7)/ml) and by high concentrations of bone marrow (10(8)/ml). Under optimal conditions, greater than 99% of 51Cr-labeled leukemic lymphoblasts can be eliminated from a 100-fold excess of human marrow. Selective removal of leukemic cells from human bone marrow in vitro should facilitate trials of autologous marrow transplantation.
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