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Guilhot, Francois,Apperley, Jane,Kim, Dong-Wook,Bullorsky, Eduardo O.,Baccarani, Michele,Roboz, Gail J.,Amadori, Sergio,de Souza, Carmino A.,Lipton, Jeffrey H.,Hochhaus, Andreas,Heim, Dominik,Larson, American Society of Hematology 2007 Blood Vol.109 No.10
<B>Abstract</B><P>Treatment options are limited for patients with imatinib-resistant or -intolerant accelerated phase chronic myeloid leukemia (CML-AP). Dasatinib is a novel, potent, oral, multitargeted kinase inhibitor of BCR-ABL and SRC-family kinases that showed marked efficacy in a phase 1 trial of patients with imatinib-resistant CML. Results are presented for 107 patients with CML-AP with imatinib-resistance or -intolerance from a phase 2, open-label study further evaluating dasatinib efficacy and safety. At 8 months' minimum follow-up, 81%, 64%, and 39% of patients achieved overall, major (MaHR), and complete hematologic responses, respectively, whereas 33% and 24% attained major and complete cytogenetic remission. Of 69 patients who achieved MaHR, 7 progressed. Seventy-six percent of patients are estimated to be alive and progression-free at 10 months. Response rates for the 60% of patients with baseline BCR-ABL mutations did not differ from the total population. Dasatinib was well tolerated: most nonhematologic adverse events (AEs) were mild to moderate; no imatinib-intolerant patients discontinued dasatinib because of AEs. Although common (76% of patients with severe neutropenia), cytopenias were manageable through dose modification. In summary, dasatinib induced significant hematologic and cytogenetic responses in patients with imatinib resistance or intolerance, was well tolerated, and may represent a potent new therapeutic option for CML-AP. Further follow-up is warranted. This trial was registered at www.clinicaltrials.gov as #CA180005.</P>
Dasatinib treatment for Philadelphia chromosome-positive leukemias : Practical considerations
Khoury, Hanna Jean,Guilhot, Franç,ois,Hughes, Timothy P.,Kim, Dong-Wook,Cortes, Jorge E. Wiley Subscription Services, Inc., A Wiley Company 2009 Cancer Vol.115 No.7
<P>Dasatinib is a highly potent Bcr-Abl inhibitor that is approved for the treatment of imatinib-resistant or -intolerant chronic myeloid leukemia (CML) and Philadelphia chromosome-positive acute lymphoblastic leukemia. Across a series of phase 2 and 3 trials, dasatinib was associated with durable treatment responses in all phases of the disease and was well tolerated. For this article, the authors reviewed available information on specific side effects associated with the use of dasatinib. On the basis of more than 2 years' experience of dasatinib treatment during clinical trials, they provide practical recommendations for side-effect management. Cancer 2009. © 2009 American Cancer Society.</P>
Cortes, Jorge E.,Baccarani, Michele,Guilhot, Franç,ois,Druker, Brian J.,Branford, Susan,Kim, Dong-Wook,Pane, Fabrizio,Pasquini, Ricardo,Goldberg, Stuart L.,Kalaycio, Matt,Moiraghi, Beatriz,Rowe, American Society of Clinical Oncology 2010 Journal of clinical oncology Vol.28 No.3
<B>Purpose</B><P>To evaluate the safety and efficacy of initial treatment with imatinib mesylate 800 mg/d (400 mg twice daily) versus 400 mg/d in patients with newly diagnosed chronic myeloid leukemia in chronic phase.</P><B>Patients and Methods</B><P>A total of 476 patients were randomly assigned 2:1 to imatinib 800 mg (n = 319) or 400 mg (n = 157) daily. The primary end point was the major molecular response (MMR) rate at 12 months.</P><B>Results</B><P>At 12 months, differences in MMR and complete cytogenetic response (CCyR) rates were not statistically significant (MMR, 46% v 40%; P = .2035; CCyR, 70% v 66%; P = .3470). However, MMR occurred faster among patients randomly assigned to imatinib 800 mg/d, who had higher rates of MMR at 3 and 6 months compared with those in the imatinib 400-mg/d arm (P = .0035 by log-rank test). CCyR also occurred faster in the 800-mg/d arm (CCyR at 6 months, 57% v 45%; P = .0146). The most common adverse events were edema, gastrointestinal problems, and rash, and all were more common in patients in the 800-mg/d arm. Grades 3 to 4 hematologic toxicity also occurred more frequently in patients receiving imatinib 800 mg/d.</P><B>Conclusion</B><P>MMR rates at 1 year were similar with imatinib 800 mg/d and 400 mg/d, but MMR and CCyR occurred earlier in patients treated with 800 mg/d. Continued follow-up is needed to determine the clinical significance of earlier responses on high-dose imatinib.</P>
Cortes, Jorge,Rousselot, Philippe,Kim, Dong-Wook,Ritchie, Ellen,Hamerschlak, Nelson,Coutre, Steven,Hochhaus, Andreas,Guilhot, Francois,Saglio, Giuseppe,Apperley, Jane,Ottmann, Oliver,Shah, Neil,Erben, American Society of Hematology 2007 Blood Vol.109 No.8
<B>Abstract</B><P>The prognosis for patients with chronic myeloid leukemia (CML) in myeloid blast crisis (MBC) or lymphoid blast crisis (LBC) remains poor. Although imatinib can induce responses in a subset of these patients, resistance to the drug develops rapidly. Dasatinib is a novel, oral, multitargeted kinase inhibitor of BCR-ABL and SRC family kinases. After promising phase 1 results, we report the results of phase 2 clinical trials of dasatinib in patients with imatinib-resistant or -intolerant blast crisis CML (MBC, n = 74; LBC, n = 42). At the 8-month follow-up, dasatinib induced major hematologic responses (MaHRs) in 34% and 31% of MBC- and LBC-CML patients and major cytogenetic responses (MCyRs) in 31% and 50% of these patients, respectively. Most (86%) of these MCyRs were complete cytogenetic responses (CCyRs). Responses were rapid and durable: 88% and 46%, respectively, of MBC- and LBC-CML patients achieving MaHR had not experienced disease progression at the 8-month follow-up. Response rates were similar in patients with and without BCR-ABL mutations known to confer resistance to imatinib. Dasatinib was well tolerated. Nonhematologic adverse events were mild to moderate. Cytopenias were common and could be managed by dose modification. Dasatinib is highly active and produces hematologic and cytogenetic responses in a significant number of patients with imatinib-resistant or -intolerant MBC- and LBC-CML. These trials were registered at www.clinicaltrials.gov as #CA180006 and #CA180015.</P>