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  • Title: The multi-tyrosine kinase inhibitor TKI258, alone or in combination with RAD001, is effective for treatment of human leukemia with BCR-ABL translocation in vitro.
    Author: Eucker J, Zang C, Zhou Y, Li X, Habbel P, Neumann C, Scholz C, Liu H.
    Journal: Anticancer Res; 2014 Sep; 34(9):4909-14. PubMed ID: 25202073.
    Abstract:
    BACKGROUND/AIM: BCR-ABL-positive (BCR-ABL(+)) leukemia is very difficult to treat although much improvement has been achieved due to the clinical application of imatinib and the second-generation tyrosine kinase inhibitors (TKIs). This study aimed to evaluate for the first time the treatment value of the multiple tyrosine kinase inhibitor TKI258 in BCR-ABL(+) leukemia. MATERIALS AND METHODS: Proliferation of different BCR-ABL(+) leukemic cells was measured with 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay; cell apoptosis with Annexin V/propidium iodide (PI) and flow cytometry. Gene expression at the protein level was determined by western blotting. RESULTS: This drug showed treatment efficacy in naïve and imatinib-resistant BCR-ABL(+) leukemia cells, particularly in cells harboring T315I-mutated BCR-ABL, for which no effective inhibitor is available to date. By combination with the mTOR inhibitor RAD001, a synergistic effect on cell proliferation was observed in these cell lines. CONCLUSION: TKI258 may become a potent therapeutic agent, either alone or in combination with RAD001, for treatment of BCR-ABL(+) leukemia.
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