Abexinostat in Combination With Pembrolizumab in Patients With Advanced Solid Tumor Malignancies
brief summary
This phase I trial studies the best dose and side effects of abexinostat and how well it works with given together with pembrolizumab in treating participants with microsatellite instability (MSI) solid tumors that have spread to other places in the body. Abexinostat may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth. Monoclonal antibodies, such as pembrolizumab, may interfere with the ability of tumor cells to grow and spread. Giving abexinostat and pembrolizumab may work better in treating participants with solid tumors.
detailed description
PRIMARY OBJECTIVES:
I. To determine the maximally tolerated and recommended phase 2 dose of abexinostat in combination with anti-PD-1/PD-L1 checkpoint inhibitor (CPI). (Dose escalation)
II. To determine the objective response rate (ORR) by Response Evaluation Criteria in Solid Tumors (RECIST) 1.1 criteria in patients treated with abexinostat in combination with CPI in patients with prior primary (cohort A) or acquired (cohort B) resistance to prior CPI treatment. (Dose expansion)
SECONDARY OBJECTIVES:
I. To determine the objective response rate and median duration of response (DoR) by immune modified (i)RECIST criteria.
II. To determine the median progression-free survival (PFS).
III. To further characterize the safety profile of the treatment combination.
OUTLINE: This is a dose-escalation study of abexinostat.
Participants receive abexinostat orally (PO) twice daily (BID) on days 1-21 and pembrolizumab intravenously (IV) on over 30 minutes day 1. Courses repeat every 21 days in the absence of disease progression or unacceptable toxicity.
After completion of study treatment, participants are followed up for 90 days.
official title
A Phase 1b Dose Escalation/Expansion Study of Abexinostat in Combination With Pembrolizumab in Patients With Advanced Solid Tumor Malignancies