A Study of APG-1252 in Patients With SCLC or Other Solid Tumors

APG-1252 is a highly potent Bcl-2 family protein inhibitor, a promising drug candidate which shown high binding affinities to Bcl-2, Bcl-xL and Bcl-w. The preclinical studies have shown that APG-1252 alone achieves complete and persistent tumor regression in multiple tumor xenograft models with a twice weekly or weekly dose-schedule, including SCLC, colon, breast and acute lymphocytic leukemia (ALL) cancer xenografts; achieves strong synergy with the chemotherapeutic agents, indicating that APG-1252 may have a broad therapeutic potential for the treatment of human cancer as a single agent and in combination with other classes of anticancer drugs. APG-1252 is intended for the treatment of patients with SCLC or other solid tumors. This is a multi-center, open-label, dose escalation Phase I study to determine the MTD and DLTs of intravenously administered APG-1252. After dose escalation to 240mg twice weekly, 2 dose cohorts two different dosing schedules including weekly and twice weekly will be assessed to evaluate for safety, tolerability, pharmacokinetics (PK) and preliminary anti-tumor efficacy. Treatment with APG-1252 will be administered to 30-60 patients at approximately 2 investigational sites in US.

In dose cohort 1, patients will be treated in cycles, which are defined by APG-1252 intravenous administration on Days 1, 4, 8, 11, 15, 18 and 22, over a 28-day cycle the start dose is 10mg. After dose escalation to 240mg twice weekly in dose cohort 1, dose cohort 2 will be performed with dose cohort 1 parallelly, patients will be treated in the same 28-day-cycles, APG-1252 intravenous administration on Days 1, 8, 15, and 22, the start dose is 240mg. In both dose cohorts' patients could continue to receive cycles of APG-1252 until disease progress or unacceptable toxicity. Study drug will be administered by intravenous infusion for 30 minutes at the investigational site by site staff.