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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
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

Full criteria on ClinicalTrials.gov

Sites (13)

Sites in registry order. Pick your city on the disease page to sort them by distance.

SiteCityCountrySite status
Kantonsspital Aarau
Coordinator of this site? Confirm its status
AarauSwitzerlandRecruiting
Kantonsspital Baden
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BadenSwitzerlandRecruiting
St. Claraspital
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BaselSwitzerlandRecruiting
Universitaetsspital Basel
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BaselSwitzerlandRecruiting
Inselspital Bern
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BernSwitzerlandRecruiting
Spitalzentrum Biel - MEDIN La Tour
Coordinator of this site? Confirm its status
BielSwitzerlandRecruiting
Kantonsspital Graubunden
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ChurSwitzerlandRecruiting
Luzerner Kantonsspital
Coordinator of this site? Confirm its status
LucerneSwitzerlandRecruiting
HOCH Health Ostschweiz - Kantonsspital St. Gallen
Coordinator of this site? Confirm its status
Sankt GallenSwitzerlandRecruiting
Bürgerspital Solothurn
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SolothurnSwitzerlandRecruiting
HFR Freiburg - Kantonsspital
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Villars-sur-GlâneSwitzerlandRecruiting
Kantonsspital Winterthur
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WinterthurSwitzerlandRecruiting
Universitätsspital Zürich USZ
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ZurichSwitzerlandRecruiting

This page is information, not medical advice. Discuss any trial with your doctor.