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Purpose. Dasatinib is an oral tyrosine kinase inhibitor (TKI) of BCR-ABL and SRC family and ixabepilone is an epothilone B analog. Synergistic activity has been reported when combining dasatinib with chemotherapy. This study was conducted to determine the dose-limiting toxicities (DLTs) and the maximum tolerated doses (MTDs) for this combination. Patients and methods. Patients with metastatic solid tumors who progressed on standard therapy received dasatinib orally daily and ixabepilone IV every 3 weeks at escalating doses using 3 + 3 design. An expansion cohort was studied after reaching the MTD. Pharmacokinetic studies were performed. Results. Nineteen patients were enrolled. No DLTs were observed at dose level (DL) 1 (dasatinib 100 mg and ixabepilone 30 mg/m(2)). At DL 2 (dasatinib 100 mg and ixabepilone 40 mg/m(2)), one patient had multiple DLTs. At DL 3 (dasatinib 150 mg and ixabepilone 40 mg/m(2)), the first patient developed grade 3 AE during cycle 2, the second patient had a DLT and a grade 3 AE during cycle 2. The accrual to DL 3 was halted without reaching the maximally administered dose (MAD) and MTDs were determined to be dasatinib 100 mg and ixabepilone 40 mg/m(2) (DL 2). One patient had a partial response and 12 patients stable disease as their best response. Fourteen patients came off study due to toxicities. Conclusion. The combination of dasatinib and ixabepilone showed modest clinical activity with doses 100 mg orally daily and 40 mg/m(2) IV every 3 weeks, respectively. Treatment related toxicities were seen frequently.
Washington Cancer Institute (WCI)/ Medstar Washington Hospital Center (WHC), 110 Irving Street, NW, Washington, DC, 20010, USA, Pia.M.Herbolsheimer@Medstar.net.
This article was published in the following journal.
Name: Investigational new drugs
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Fractionation of a vaporized sample as a consequence of partition between a mobile gaseous phase and a stationary phase held in a column. Two types are gas-solid chromatography, where the fixed phase is a solid, and gas-liquid, in which the stationary phase is a nonvolatile liquid supported on an inert solid matrix.
Colloids with a solid continuous phase and liquid as the dispersed phase; gels may be unstable when, due to temperature or other cause, the solid phase liquefies; the resulting colloid is called a sol.
An extraction method that separates analytes using a solid phase and a liquid phase. It is used for preparative sample cleanup before analysis by CHROMATOGRAPHY and other analytical methods.
Colloids with liquid continuous phase and solid dispersed phase; the term is used loosely also for solid-in-gas (AEROSOLS) and other colloidal systems; water-insoluble drugs may be given as suspensions.
Work that is a report of a pre-planned, usually controlled, clinical study of the safety and efficacy of diagnostic, therapeutic, or prophylactic drugs, devices, or techniques after phase II trials. A large enough group of patients is studied and closely monitored by physicians for adverse response to long-term exposure, over a period of about three years in either the United States or a foreign country.
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