Phase 1/2 Dose-Escalation and Expansion Study of FLX475 Alone and in Combination with Pembrolizumab in Advanced Cancer
Summary
This clinical trial is a Phase 1/2, open-label, sequential-group, dose-escalation and cohort expansion study to determine the safety and preliminary anti-tumor activity of FLX475 as monotherapy and in combination with pembrolizumab.
Objective
Primary: To evaluate the safety and tolerability of FLX475 as a single agent and in combination with pembrolizumab in subjects with advanced cancer;
To evaluate the anti-tumor activity of FLX475 as a single agent and in combination with pembrolizumab in subjects with advanced solid tumors.
Secondary: To define the maximum tolerated dose (MTD) and/or RP2D of FLX475, both as a single agent and in combination with pembrolizumab; To evaluate the PK profile of FLX475 alone and in combination with pembrolizumab; To assess the effects of FLX475 alone or in combination with pembrolizumab on PD markers
relating to drug mechanism of action; To explore the relationships of PK and PD parameters to clinical drug activity; To characterize the onset, magnitude, and duration of tumor control in subjects receiving FLX475 alone or in combination with pembrolizumab
History of allergy or severe hypersensitivity to biologic agents
History of Grade 3-4 immune-related adverse events leading to discontinuation of prior immuno-oncology treatment
Active autoimmune disease or serious autoimmune disease within past 2 years requiring systemic therapy
History of idiopathic pulmonary fibrosis, organizing pneumonia, drug-induced pneumonitis, idiopathic pneumonitis, (non-infectious) pneumonitis that required steroids, or symptoms of active pneumonitis
Prior allogeneic hematopoietic stem cell transplant within 5 years, or prior allogeneic organ transplant
Active graft-versus-host disease
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