Overview
This is a Phase 1b/2, open-label, dose escalation study to evaluate the safety, tolerability, PK, and immunogenicity of ADG126-pembrolizumab combination regimens in patients with advanced/metastatic solid tumors.
Description
This is a Phase 1b/2, open-label, multicenter, dose escalation and dose expansion study to evaluate the safety, tolerability, PK, and preliminary efficacy of ADG126-Pembrolizumab alone or ADG126-Pembrolizumab in combination with trifluridine/tipiracil-bevacizumab or fruquintinib in patients with advanced/metastatic solid tumors, with a focus on MSS CRC.
The study drug ADG126 is an anti-CTLA-4 fully human monoclonal antibody that specifically binds to human CTLA-4. Pembrolizumab is a PD-1 receptor-blocking antibody (a humanized IgG4 monoclonal antibody).
Eligibility
Inclusion Criteria:
- ≥18 years of age at the time of informed consent.
- Eastern Cooperative Oncology Group (ECOG) performance status 0 or 1.
- Wash out period from previous antitumor therapies
- At least 1 measurable lesion at baseline according to the definition of RECIST v1.1.
- Adequate organ function.
- An archival tumor biopsy is required and should be taken within 2 years of enrollment. If not available, a fresh tumor biopsy is acceptable.
- For Dose Escalation Phase Only: Patients with histologically or cytologically confirmed, locally advanced or metastatic solid tumors, who have progressed after all standard therapies, or for whom no further standard therapy exists.
- Dose Expansion Phase Only: Tumor tissues (archived or fresh biopsy) before treatment are required for all patients.
Exclusion Criteria:
- Pregnant or breastfeeding females.
- Childbearing potential who does not agree to the use of contraception during the treatment period.
- Treatment with any investigational drug within washout period.
- Prior treatment with an anti-CTLA-4 therapy.
- History of significant irAEs or irAE.
- Central nervous system (CNS) disease involvement.
- History or risk of autoimmune disease.
- Patients requiring systemic treatment with corticosteroids or other immunosuppressive medications (>10 mg/day prednisone or equivalent).
- Any uncontrolled active infections requiring systemic antimicrobial treatment (viral, bacterial, or other), or uncontrolled or poorly controlled, asthma, chronic obstructive pulmonary disease (COPD).
- Major surgery within 4 weeks prior to the first dose of the study drug.
- Has had an allogeneic tissue/solid organ transplant.
- Has received a COVID-19 vaccine within 7 days prior to the first dose of study treatment. Has received a live or live-attenuated vaccine within 30 days prior to the first dose of study treatment. Note: Administration of killed vaccines are allowed.
- A positive COVID-19 test within 14 days of Cycle 1 Day 1.
- History of severe Hypersensitivity (Grade ≥3)or known to be allergic to protein drugs or recombinant protein.