Tests a new medicine with chemotherapy for colon or rectal cancer that has spread
Compares new medicine PF-08634404 with chemotherapy against bevacizumab with chemotherapy in adults with colorectal cancer.
Plain-language title generated from the registry record
Registry title: Symbiotic-GI-03: A Study to Learn About the Study Medicine Called PF-08634404 in Combination With Chemotherapy in Adult Participants With Metastatic Colorectal Cancer
Key facts
- Where
- Porto Alegre, Recife, Rio de Janeiro, São Caetano do Sul, and São Paulo, BrazilSee the 6 sites
- Phase
- Phase 3
Where in Brazil
- Hospital de Clinicas de Porto AlegrePorto Alegre, BrazilTaking people
- Hospital de Câncer de RecifeRecife, BrazilTaking people
- Instituto Nacional de Câncer - INCARio de Janeiro, BrazilTaking people
- Centro de Oncologia - CEON+ - Unidade São Caetano do SulSão Caetano do Sul, BrazilTaking people
- Instituto do Cancer Doutor Arnaldo Vieira de CarvalhoSão Paulo, BrazilTaking people
- Sociedade Beneficente Israelita Brasileira Hospital Albert EinsteinSão Paulo, BrazilTaking people
Questions to ask the study team
- How often do I need to come in, and for how long each time?
- Are travel costs paid?
- Can I keep my own doctor?
- What happens if I want to stop?
Trial details
- Who runs it
- Pfizer
- Trial code
- NCT07222800EU 2025-523521-18-00
- Record updated
- 8 October 2026
- Original description
The purpose of this study is to learn more about a new medicine called PF-08634404, and how well it works in people with cancer of the colon or rectum (CRC)). The goal is to understand if the new study medicine, combined with chemotherapy that is approved for colorectal cancer, can help people whose cancer has spread or returned after treatments taken before.Read full original descriptionShow less
AN INTERVENTIONAL, PHASE 3, DOUBLE-BLIND, RANDOMIZED STUDY TO EVALUATE THE EFFICACY AND SAFETY OF PF-08634404 IN COMBINATION WITH CHEMOTHERAPY VERSUS BEVACIZUMAB IN COMBINATION WITH CHEMOTHERAPY IN TREATMENT-NAÏVE PARTICIPANTS WITH METASTATIC COLORECTAL CANCER
The purpose of this study is to learn more about a new medicine called PF-08634404, and how well it works in people with cancer of the colon or rectum (CRC)). The goal is to understand if the new study medicine, combined with chemotherapy that is approved for colorectal cancer, can help people whose cancer has spread or returned after treatments taken before.
To join the study, participants must meet the following conditions:
* Be 18 years or older. * Have colorectal cancer that has spread to other parts of your body. * Be in good enough health to receive study treatment. * Should not be pregnant before starting treatment.
Participants will be randomized (like flipping a coin) to one of 2 different treatment arms. The first arm (Arm A) will include the new medicine PF-08634404 in combination with chemotherapy that is approved for colorectal cancer, and the second arm (Arm B) will include an approved medicine for colorectal cancer, called Bevacizumab, in combination with chemotherapy that is approved for this type of cancer. Participants and their doctors will not know which arm they are being assigned to. Participants will receive all the study medications through intravenous (IV) infusions, which means the medicine is given directly into a vein. The treatment will be given in cycles, and participants may continue receiving it if it is helping and they are not experiencing serious side effects.
The medicine will be given at a clinical site, where trained medical staff will check participants during and after each treatment.
* The study is expected to last approximately 33 months for each participant. * Participants will have regular visits to the study site for treatment, health checks, and tests. * After stopping treatment, participants will return for a final visit about 30 to37 days later to check their health and review any side effects. * Follow-up will continue every 12 weeks by phone or in person or by reviewing health records to check on health status and any new treatments.
Inclusion: Histological or cytological confirmed colorectal adenocarcinoma; Evidence of Stage IV metastatic disease; No prior systemic therapy for metastatic disease; Eastern Cooperative Oncology Group performance status (ECOG) 0-1; At least one measurable lesion according to RECIST 1.1 per Investigator assessment; Adequate hepatic, liver, and renal function.
Exclusion: Major surgery or severe trauma within 4 weeks prior to the first dose, or planned major surgery during the study; Any Grade ≥3 bleeding/hemorrhage events within 28 days of Cycle 1 Day 1, or prior history of clinically significant bleeding events; Clinically significant cardiovascular disease, or other comorbidities, within 6 months prior to first dose; Locally confirmed microsatellite instability (MSI)-high or DNA mismatch repair deficiency (dMMR) colorectal cancer; Clinically significant risk of hemorrhage or fistula; History of allogeneic organ transplantation and allogeneic hematopoietic stem cell transplantation; Participants with active autoimmune diseases requiring systemic treatment within the past 2 years; Evidence of non-infectious or drug-induced interstitial lung disease (ILD) pneumonitis; Participants are excluded from the study if any of the following criteria apply:; Locally confirmed BRAF V600E mutation; Participants with known active symptomatic CNS lesions, including leptomeningeal metastasis, brainstem, meningeal, or spinal cord metastases or compression.