Phase 1, Dose-escalation Trial of OPB-51602 in Patients With Advanced Solid Tumors

OPB-51602 at a dose of 2, 5, 10, 20, 40, 60, 80, or 100 mg/day,will be orally administered to subjects once daily for 2 weeks in each cycle of treatment in Dose Escalation Stage.A 2-day treatment-free interval will occur on Days 2 and 3 for PK sampling. Study drug administration will resume on Day 4 and continue until Day 17 in cycle 1.In Expansion stage part 1, OPB-51602 will be administered at recommend dose (4mg) for 3 weeks per cycle 9 2 weeks treatment and 1 week washout). There is also 2-day treatment free interval between Day 1 and Day 4 for PK sampling in cycle 1.In Expansion stage part 2, subject dosing will be started on Day 1 without 2-day treatment free interval and continued until Day 28 at recommend dose (4mg) first in Cycle 1. The same subjects will be treated at MTD(5mg)from cycle 2 onwards for 4 weeks per cycle.