A Phase I Pharmacokinetic Study Of Epothilone B Analogue BMS-247550 (NSC 710428D) In Patients With Advanced Malignancies And Varying Levels Of Liver Dysfunction

OBJECTIVES:

• Determine the levels of hepatic impairment at which dose modifications of ixabepilone are required in patients with advanced solid tumors or lymphomas and varying levels of liver dysfunction.
• Determine the effect of hepatic dysfunction on the plasma pharmacokinetics of this drug in these patients.
• Determine the toxic effects of this drug at varying levels of hepatic dysfunction in these patients.

OUTLINE: This is a dose-escalation, multicenter study. Patients are stratified according to liver function (normal vs mild dysfunction vs moderate dysfunction vs severe dysfunction).

Patients receive ixabepilone IV over 3 hours on day 1. Courses repeat every 3 weeks in the absence of disease progression or unacceptable toxicity.

Cohorts of 3-6 patients receive escalating doses of ixabepilone until the maximum tolerated dose (MTD) is determined. The MTD is defined as the dose preceding that at which at least 2 of 3 or 2 of 6 patients experience dose-limiting toxicity. Once the MTD is determined, at least 6 but no more than 12 patients are treated at the recommended phase II dose.