title: Ex vivo treatment of myeloma cells by 4-hydroperoxycyclophosphamide and VP-16-213.
abstract: To assess the usefulness of 4-hydroperoxycyclophosphamide (4-HC) and VP-16-213 (VP-16) as a purging agent for myeloma cells in bone marrow (BM) ex vivo, myeloma cell lines (SK-RCS-1, RPMI-8226), lymphoma cell line (SK-DHL-2) and normal BM cells were treated at different concentrations of 4-HC or VP-16. Clonogenic tumor cells from all three cell lines could be reduced by more than 4 logs, when treated alone or as a mixture with irradiated normal BM cells at a 4-HC concentration of 60 microM. Under similar conditions, approximately 1% of the normal BM myeloid progenitor granulocyte-macrophage colony-forming cells survived. These observations support the use of 4-HC for purging myeloma cells for autologous BM transplantation.
mesh_terms: D001853:Bone Marrow / Q000528:radiation effects; D002450:Cell Communication; D002460:Cell Line; D002470:Cell Survival / Q000187:drug effects; D003114:Colony-Forming Units Assay; D003520:Cyclophosphamide / Q000031:analogs & derivatives* / Q000494:pharmacology; D006410:Hematopoiesis / Q000187:drug effects; D006801:Humans; D009101:Multiple Myeloma / Q000188:drug therapy* / Q000473:pathology; D014411:Neoplastic Stem Cells / Q000187:drug effects; D011034:Podophyllotoxin / Q000031:analogs & derivatives* / Q000494:pharmacology
chemical_list: D003520:Cyclophosphamide; D011034:Podophyllotoxin; C011272:perfosfamide