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Oregon Health and Sciences University Cancer Institute, Division of Hematology and Medical Oncology, Portland, Oregon 97239 [P. L. R., A. S. C., E. P. S., M. W. D., B. J. D.], and III. Medizinische Universitätsklinik, Fakultät für klinische Medizin Mannheim der Universität Heidelberg, 68305 Mannheim, Germany [P. L. R.]
Imatinib mesylate, a selective inhibitor of the Abl tyrosine kinase, is effective as a single-agent therapy for chronic myelogenous leukemia. However, resistance has been reported, particularly in patients with advanced-stage disease. Mutations within the Abl kinase domain are a major cause of resistance, demonstrating that Bcr-Abl remains a critical drug target. Recently, a novel pyrido[2,3-d]pyrimidine derivative, PD180970, has been shown to potently inhibit Bcr-Abl and induce apoptosis in Bcr-Abl-expressing leukemic cells. We analyzed the inhibitory activity of PD180970 against Abl kinase domain mutations and cells expressing clinically relevant mutations. Our data indicate that PD180970 is active against several Bcr-Abl mutations that are resistant to imatinib and support the notion that developing additional Abl kinase inhibitors would be useful as a treatment strategy for chronic myelogenous leukemia.
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A. S. Corbin, P. L. Rosee, E. P. Stoffregen, B. J. Druker, and M. W. Deininger Several Bcr-Abl kinase domain mutants associated with imatinib mesylate resistance remain sensitive to imatinib Blood, June 1, 2003; 101(11): 4611 - 4614. [Abstract] [Full Text] [PDF] |
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C. Yu, M. Rahmani, J. Almenara, M. Subler, G. Krystal, D. Conrad, L. Varticovski, P. Dent, and S. Grant Histone Deacetylase Inhibitors Promote STI571-mediated Apoptosis in STI571-sensitive and -resistant Bcr/Abl+ Human Myeloid Leukemia Cells Cancer Res., May 1, 2003; 63(9): 2118 - 2126. [Abstract] [Full Text] [PDF] |
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