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  • Title: Effect of recombinant interferons on colony formation of blast progenitors in acute myeloblastic leukemia.
    Author: Takanashi M, Motoji T, Oshimi K, Mizoguchi H.
    Journal: Exp Hematol; 1987 Oct; 15(9):946-51. PubMed ID: 2443379.
    Abstract:
    The effect of recombinant interferons (rIFNs) on primary and secondary colony formation by blast progenitors (leukemic colony-forming units, L-CFU) from the peripheral blood of patients with acute myeloblastic leukemia (AML) was examined. rIFN-alpha, rIFN-beta, and rIFN-gamma inhibited L-CFU in a dose-dependent manner. When 3000 U/ml rIFN-alpha, -beta, and -gamma were added, L-CFU were suppressed to 20%, 12%, and 40% of the control cultures, respectively. The concentrations of rIFN-alpha, -beta, and -gamma required for 50% inhibition of colony formation were 63, 29, and 250 U/ml, respectively. The self-renewal capacity of L-CFU was inhibited by rIFNs in a dose-dependent manner, the degree of inhibition being the same for all three rIFNs. These rIFNs also inhibited normal granulocyte-macrophage progenitors to a similar degree as L-CFU. Taken together, these in vitro studies indicate that these rIFNs may be efficacious in the treatment of AML, though development of granulocytopenia may be observed as a complication of IFN therapy.
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