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  • Title: Normal myeloid progenitors (CFU-GM) in multiple myeloma: a preliminary study in view of autologous BMT.
    Author: Lemoli RM, Visani G, Gobbi M, Rizzi S, Dinota A, Tassi C, Tosi P, Galieni P, Cavo M, Tura S.
    Journal: Bone Marrow Transplant; 1989 Jul; 4(4):373-7. PubMed ID: 2673456.
    Abstract:
    Normal granulocyte-macrophage precursors (CFU-GM) were studied in 65 multiple myeloma patients by means of culture assays. The patients were divided into separate groups on the basis of previous therapy (i.e. analysis performed at diagnosis or after chemotherapy), time elapsed from the last therapy (i.e. more or less than 1 month) and clinical features of the disease (i.e. tumor stage, immunoglobulin type, bone marrow plasma cell infiltration). The results were evaluated by Wilcoxon rank sum test and linear regression analysis. There was no statistical difference in CFU-GM cloning efficiency or in the number of CFU-GM/ml of bone marrow, even though a larger CFU-GM recovery was found in patients evaluated at diagnosis or at least 1 month or more from previous chemotherapy. In addition, no correlation was demonstrated between bone marrow plasma cell percentage and CFU-GM cloning efficiency. This finding was confirmed by the number of myeloid bone marrow cells in S-phase, assessed by the bromodeoxyuridine labeling index, which showed similar results in patients with different degrees of plasma cell infiltration. In conclusion our data indicate that the granular-monocytic lineage keeps its cell-line potentiality regardless of the degree of marrow plasma cell infiltration and the type of therapeutic approach. These data suggest that autologous bone marrow transplantation might be feasible even in patients with a large neoplastic infiltration.
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