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  • Title: [Imatinib therapy for patients with chronic myelogenous leukemia].
    Author: Usui N.
    Journal: Gan To Kagaku Ryoho; 2005 Mar; 32(3):297-303. PubMed ID: 15791812.
    Abstract:
    Chronic myelogenous leukemia (CML) is a clonal hematopoietic disorder caused by the reciprocal translocation between chromosome 9 and 22. As a result of this translocation, a novel fusion gene, BCR-ABL, is created on Philadelphia (Ph) chromosome, and the constitutive activity of the BCR-ABL protein tyrosine kinase plays a critical role in the disease pathogenesis. Imatinib mesylate, a selective BCR-ABL tyrosine kinase inhibitor, was first given to a patient with CML in June 1998. Since then, it has continued to demonstrate remarkable efficacy in treating patients with CML. Based upon the results of early phase I and II studies, a phase III study (IRIS Study) that was randomized to first-line imatinib (400 mg/day) or to standard treatment with interferon+low-dose Ara-C, was conducted on 1,106 patients newly diagnosed (within 6 months) with chronic-phase CML. After median follow-up of 30 months, imatinib showed significantly superior tolerability, hematologic and cytogenetic responses (major cytogenetic response, 90%; complete cytogenetic response, 82%), and overall survival (95% without censoring allo-HSCT). Although imatinib is the first-line therapy and has changed the paradigm of CML treatment strategy, questions remain as to the meaning of cytogenetic and molecular response, curability, optimal dose, and relation with allo-HSCT.
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