NCT07617610Recruiting
Primary and Acquired Resistance to Targeted Treatment in BRAF V600E-mutated Metastatic Colorectal Cancer
Primary and Acquired Resistance to Targeted Treatment in BRAF V600E-mutated Metastatic Colorectal Cancer (PARTACER-Suisse)
Source: ClinicalTrials.gov · Last updated 16 Jul 2026
Brief summary (registry, in English)
This study prospectively investigates the molecular mechanisms of primary and acquired resistance to standard-of-care BRAF V600E-directed therapy in patients with metastatic colorectal cancer and aims to pre-clinically develop novel strategies to reverse therapy resistance. Clinically approved combination treatment with cetuximab, encorafenib and chemotherapy improves patient outcomes, yet patients eventually experience disease progression. In this prospective multicenter study, tumor tissue, blood, and stool samples will be collected before treatment and at progression, to identify genetic and non-genetic mechanisms of resistance. Additionally, tumor tissue-based in vitro models (patient-derived organoids, PDOs) will be generated and exploited for functional in vitro testing, including genomic and pharmacologic perturbation studies. The overarching goal is to generate knowledge that can help develop new and more effective treatment strategies for future patients.
- Status (registry)
- Recruiting
- Study type
- Observational
- Enrollment
- 30 (estimated)
- First submitted
- 22 May 2026
- Start date
- 25 May 2025
- Primary completion date
- Sept 2030
- Lead sponsor
- Swiss Cancer Institute
- Diseases
- Colorectal cancer
- NCT number
- NCT07617610
What you commit to
- Study type: Observational
- Planned participants: 30
- From 25 May 2025 to the primary completion date, Sept 2030
- 13 sites in 1 country
- Visits and tests: ask the trial team, the registry does not list them
Built from the registry fields of ClinicalTrials.gov. It describes the study, not your situation.
Who cannot take part
Copied verbatim from ClinicalTrials.gov and grouped by topic. Only the trial team decides who can take part.
Prior treatment
- Medical or surgical contraindication for tumor biopsy
- Previous treatment with a BRAF inhibitor
Other illness
- Active second malignancy (except non-melanoma skin cancer)
- Inability to comply with study procedures (e.g., due to language barriers or cognitive impairment)
Other
- Pregnancy or breastfeeding
Who the study is looking for
- Diagnosis of unresectable or metastatic BRAF V600E-mutated colorectal cancer
- Planned initiation of treatment with combined anti-EGFR antibody and BRAF inhibitor
- Patients receiving treatment in any line, with or without chemotherapy
- At least one tumor lesion accessible for biopsy
- ECOG performance status 0-2
- Life expectancy of at least 3 months
- Age ≥18 years
- Ability to provide written informed consent
Age in the registry: 18 years to - · Sex: All · Does not accept healthy volunteers
Sites (13)
Sites in registry order. Pick your city on the disease page to sort them by distance.
| Site | City | Country | Site status |
|---|---|---|---|
| Kantonsspital Aarau Coordinator of this site? Confirm its status | Aarau | Switzerland | Recruiting |
| Kantonsspital Baden Coordinator of this site? Confirm its status | Baden | Switzerland | Recruiting |
| St. Claraspital Coordinator of this site? Confirm its status | Basel | Switzerland | Recruiting |
| Universitaetsspital Basel Coordinator of this site? Confirm its status | Basel | Switzerland | Recruiting |
| Inselspital Bern Coordinator of this site? Confirm its status | Bern | Switzerland | Recruiting |
| Spitalzentrum Biel - MEDIN La Tour Coordinator of this site? Confirm its status | Biel | Switzerland | Recruiting |
| Kantonsspital Graubunden Coordinator of this site? Confirm its status | Chur | Switzerland | Recruiting |
| Luzerner Kantonsspital Coordinator of this site? Confirm its status | Lucerne | Switzerland | Recruiting |
| HOCH Health Ostschweiz - Kantonsspital St. Gallen Coordinator of this site? Confirm its status | Sankt Gallen | Switzerland | Recruiting |
| Bürgerspital Solothurn Coordinator of this site? Confirm its status | Solothurn | Switzerland | Recruiting |
| HFR Freiburg - Kantonsspital Coordinator of this site? Confirm its status | Villars-sur-Glâne | Switzerland | Recruiting |
| Kantonsspital Winterthur Coordinator of this site? Confirm its status | Winterthur | Switzerland | Recruiting |
| Universitätsspital Zürich USZ Coordinator of this site? Confirm its status | Zurich | Switzerland | Recruiting |
This page is information, not medical advice. Discuss any trial with your doctor.