A Phase Ib Open-Label, Two-Arm, Dose-Finding Study of E7389 in Combination With Carboplatin in Patients With Solid Tumors

Patients will receive E7389 before (Schedule A) or after (Schedule B) carboplatin AUC 5 infusion. E7389 will be administered as a 2-5 minute intravenous (IV) bolus infusion at a starting dose of 0.7 mg/m\^2 on Days 1 and 8 every 21 days. Carboplatin 5 AUC will be administered as a 30-minute IV infusion on Day 1 every 21 days. Dose escalation will be performed in cohorts of three patients per dose level per schedule.

After MTD is reached with carboplatin AUC 5, dose escalation of E7389 in combination with carboplatin at AUC 6 will begin at one dose level below MTD, using the preferred schedule (A or B). If carboplatin AUC 6 with E7389 is tolerated, the MTD reached will be used to enroll 20 additional patients with Stage IIIB or IV non-small cell lung cancer (NSCLC). If carboplatin AUC 6 is not tolerated, these patients will be enrolled at the MTD determined with the combination of E7389 and carboplatin AUC 5.

In a population of patients who had generally received multiple prior chemotherapies, the eribulin MTD has been determined to be 1.1 mg/m2 in combination with carboplatin at an AUC of 6. The first-line NSCLC patients in the extension arm may tolerate a higher dose of eribulin, because they have not been exposed to the toxicity of other chemotherapies. To investigate this possibility, the dose of eribulin will be increased to 1.4 mg/m2 for subsequent patients, if the first six of these patients do not experience a DLT during their first cycle of eribulin at 1.1 mg/m2 and carboplatin at AUC 6 combination therapy. If no more than one of the first six patients experience a DLT during the first cycle with the 1.4 mg/m2 dose of eribulin, then the 1.4 mg/m2 dose will be considered the recommended dose for front-line NSCLC therapy and the remaining patients will be treated using this dose.