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Balb/c x DBA/2 F1 (CD2F1) mice were lethally irradiated (TBI) and reconstituted with syngeneic bone marrow cells (SBMT) untreated or treated with mafosfamide (ASTA Z 7654) for ex vivo purging of semisyngeneic L1210 leukemia (TBI + SBMT or TBI + SBMT-Maf mice, respectively). At various times after
Lymphatic leukemia L 1210 cells were treated in vitro with various concentrations of Mafosfamide--a stabilized active derivative of cyclophosphamide (4-hydroxycyclophosphamide). L 1210 cells treated with Mafosfamide (L 1210-MAF cells) were used for vaccination of semisyngeneic CD2F1 mice against L
The sensitivity of human myeloblastic leukemic (CFU-L) and normal hemopoietic stem cells (CFU-GM and BFU-e) to Asta Z 7557 (INN Mafosfamide) was studied with regard to autologous bone marrow transplantation (ABMT) with cleansed marrow for consolidation therapy in adult patients with acute leukemia
Fourteen adult patients in first complete remission of acute leukemia (A.L.) [6 with acute lymphoblastic leukemia (ALL), 8 with acute non lymphoblastic leukemia (ANLL)] were consolidated with high dose cyclophosphamide and total body irradiation followed by autologous bone marrow transplantation
The contamination of autologous marrow with clonogenic tumor cells has been the main argument against ABMT in acute leukemia. In a preclinical study we evaluated an active cyclophosphamide derivative named "ASTA Z 7557". We observed that the toxic effect of this drug on CFU-GM growth was dependent
The lymphocyte subset reconstitution after high-dose chemotherapy and total body irradiation followed by autologous bone marrow transplantation (ABMT) has been studied in ten patients with acute leukemia (AL) (6 ALL and 4 ANLL) in complete remission (CR). Bone marrow was treated in vitro with
Lymphoblasts from 11 patients with acute lymphoblastic leukaemia (ALL) of precursor-B type were exposed to the cyclophosphamide derivative mafosfamide (ASTA-Z-7654), and examined for growth inhibition using an in vitro colony assay. Leukaemic clonogenic cells were significantly more resistant to
Bone marrow from 9 patients with Ph1+CML was treated in vitro with varying concentrations of Mafosfamide in order to test the hypothesis that selective pharmacological killing of Ph1-positive cells in CML is feasible. A marked difference in sensitivity to Mafosfamide of CFU-GM was observed, but at
Certain biological effects exerted by 4-hydroperoxycyclophosphamide and by 2,4-tetrahydrocyclohexylamine (ASTA-Z-7557), utilized in vitro in the therapy of leukemias and lymphomas to eliminate the occult tumor cells in autologous marrow transplantations, were studied in human lymphocytes cultured in
The antineoplastic activities of ASTA Z 7557 and cyclophosphamide (CPA) were compared in advanced transplanted AKR lymphoma by determining the optimal dose using single dose and twofold applications. Autochthonous DMBA-induced leukemias and MNU-induced mammary carcinomas were treated with
Bone marrow purging with cyclophosphamide derivatives (Mafosfamide) requires the establishment of a defined experimental procedure for reliable leukemic cell destruction while sparing normal hematopoietic stem cells to ensure engraftment. We previously defined the granulocyte-macrophage
Hematopoietic reconstitution was assessed in 26 consecutive patients who underwent autologous bone marrow transplantation (ABMT) with ASTA-Z 7557 purged bone marrows. Of the 26, 17 had acute non-lymphoblastic leukemia (ANLL), 7 had acute lymphoblastic leukemia (ALL), 1 had non-Hodgkin's lymphoma
The activity of the in vitro active cyclophosphamide metabolite ASTA Z 7557 against pluripotent hemopoietic stem cells (CFU-S), in vitro myeloid precursor cells (CFU-C) and clonogenic leukemic cells (LCFU-S) was evaluated in a rat model for human acute myelocytic leukemia (BNML). LCFU-S were most
The kinetics of hematopoietic recovery after autologous bone marrow transplantation (ABMT) reflect the hematopoietic capacity of the infused marrow. In vitro treatment of marrow with high doses of mafosfamide (ASTA Z 7557) alters the hematopoietic regenerative capacity of the graft. Thirty-two
ASTA-Z-7557, an in vitro active metabolite of cyclophosphamide, has recently been introduced to purge autologous bone marrow grafts of patients with AML. The rationale of this approach assumes a relatively higher sensitivity of leukemic cells to the drug as compared to that of normal marrow