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Dasatinib induces rapid hematologic and cytogenetic responses in adult patients with Philadelphia chromosome-positive acute lymphoblastic leukemia with resistance or intolerance to imatinib: interim results of a phase 2 study
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences. (Blodsjukdomar)
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2007 (English)In: Blood, ISSN 0006-4971, E-ISSN 1528-0020, Vol. 110, no 7, 2309-2315 p.Article in journal (Refereed) Published
Abstract [en]

Patients with Philadelphia (Ph) chromosome-positive acute lymphoblastic leukemia (ALL) have a rapid disease course and a poor prognosis. Dasatinib, a novel, oral, multitargeted kinase inhibitor of BCR-ABL and SRC family kinases, has previously induced responses in patients with imatinib-resistant or -intolerant Ph-positive ALL. We present the interim results of a phase 2 study designed to further assess the efficacy, safety, and tolerability of dasatinib 140 mg in this patient population (n = 36). With a minimum follow-up of 8 months, treatment with dasatinib resulted in substantial hematologic and cytogenetic response rates. Major hematologic responses were achieved in 42% (15/36) of patients, 67% of whom remained progression-free. Complete cytogenetic responses were attained by 58% (21/36) of patients. The presence of BCR-ABL mutations conferring imatinib resistance did not preclude a response to dasatinib. Dasatinib was also tolerable, with 6% (2/36) of patients discontinuing therapy as a result of study-drug toxicity. Most adverse events (AEs) were grade 1 or 2; febrile neutropenia was the most frequent severe AE, but this and other cytopenias were manageable with dose reduction. Dasatinib represents a safe and effective treatment option and an important therapeutic advance for patients with Ph-positive ALL. This trial was registered at www.clinicaltrials.gov as #CA180015.

Place, publisher, year, edition, pages
2007. Vol. 110, no 7, 2309-2315 p.
National Category
Medical and Health Sciences
URN: urn:nbn:se:uu:diva-124875DOI: 10.1182/blood-2007-02-073528ISI: 000249800900025PubMedID: 17496201OAI: oai:DiVA.org:uu-124875DiVA: diva2:318084
Available from: 2010-05-06 Created: 2010-05-06 Last updated: 2011-01-20Bibliographically approved

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