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- W2247497787 abstract "6508 Background: Dasatinib (BMS-354825) is a novel, oral, multi-targeted kinase inhibitor of BCR-ABL and SRC kinases with proven preclinical and clinical activity against imatinib resistant BCR-ABL mutations. Methods: CA180013 is an open-label Phase II study of dasatinib in imatinib-resistant (IM-R) or -intolerant (IM-I) patients (pts) with CP-CML. Between February-August 2005, 424 pts were recruited from 75 centers worldwide. Dasatinib was given at 70 mg twice daily (BID) with dose escalation to 90 mg BID in pts lacking response, and dose reductions to 50 and 40 mg BID for toxicity. Evaluations were weekly blood counts for the first 12 weeks; bone marrow cytology and cytogenetics every 3 months. The primary endpoint was rate of major cytogenetic response (MCyR; ≤35% Philadelphia pos. metaphases) in IM-R pts. Results: Data are currently available from the first 186 pts (127 IM-R, 59 IM-I) accrued prior to May 12, 2005. Median age was 59 yrs (range 24–79); 46% were male. Median time from diagnosis of CML was 64 months. Of the IM-R pts, 72% received IM >3 yrs, and 72% had >600 mg/day of IM. Overall, 70% had received prior interferon alpha. 62 (33%) pts achieved a prior MCyR to IM. With ≥6 months of follow up, 168 (90%) pts had a complete hematologic response (CHR). MCyR were achieved in 83 (45%) pts including 40 (31%) of IM-R pts, and 43 (73%) of IM-I pts. Mutations in the BCR-ABL domain were found in 65/176 (37%) pts; 57 (88%) achieved CHR, and 24 (37%) MCyR. Molecular response analysis is ongoing. 160 (86%) pts remain on study without progression. Grade 3/4 neutropenia or thrombocytopenia was reported in 83 (45%) pts and 85 (46%) pts with onset after 4–8 weeks of therapy in most pts. Temporary dose interruptions occurred in 146 (78%), and dose reductions in 96 (52%) pts with a median daily of 108 (range 19–169) mg. Non-hematologic toxicity consisted mainly of Grade 1/2 diarrhea, headache, superficial edema, and pleural effusion, with ≤2% Grade 3/4. There was no cross-intolerance between dasatinib and IM. Conclusions: Dasatinib demonstrated substantial hematologic and cytogenetic activity in IM-R and IM-I pts with CP-CML. An updated analysis of 424 pts with ≥6 months of follow up will be presented. [Table: see text]" @default.
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- W2247497787 date "2006-06-20" @default.
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- W2247497787 title "Dasatinib in patients with chronic phase chronic myeloid leukemia (CP-CML) who are resistant or intolerant to imatinib: Results of the CA180013 ’START-C’ Study" @default.
- W2247497787 doi "https://doi.org/10.1200/jco.2006.24.18_suppl.6508" @default.
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