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Post-surgical Liquid Biopsy-guided Treatment of Stage III and High-risk Stage II Colon Cancer Patients: the PEGASUS Trial

Colon Cancer Clinical Trial

Official title:
Post-surgical Liquid Biopsy-guided Treatment of Stage III and High-risk Stage II Colon Cancer Patients: the PEGASUS Trial

Clinical Trial Summary

PEGASUS is a prospective multi-centric study designed to prove the feasibility of using liquid biopsy to guide the post-surgical and post-adjuvant clinical management in 140 microsatellite stable Stage-III and T4N0 Stage-II colon cancer patients.

Clinical Trial Description

The LUNAR1 Test (Guardant Health, Redwood City, CA, USA) will be used for ctDNA determination. For the efficacy analysis, the PEGASUS cohort will be compared with a cohort of 420 patients from the TOSCA trial (NCT00646607) population matched 3:1 for all known prognostic phenotypes. A post-surgical LB executed 2-4 weeks after surgery will guide a "Molecular Adjuvant" treatment as follows: i) ctDNA+ patients will receive CAPOX for 3 months; ii) ctDNA- patients will receive capecitabine (CAPE) for 6 months but will be retested after 1 cycle, and if found ctDNA+ will be switched to CAPOX treatment. Immediately after the end of the "Molecular Adjuvant" treatment a further LB will be performed and instruct subsequent treatment. Positive patients (ctDNA+/+ and ctDNA-/+) will receive an up-scaled "Molecular Metastatic" systemic treatment for 6 months or until radiological progression or toxicity as follows: i) ctDNA+/+ patients will be treated with FOLFIRI; ii) ctDNA-/+ patients with CAPOX. These patients will be subjected to a LB after 3 months at the end of treatment and in case of positivity will be switched to FOLFIRI. Patients experiencing ctDNA conversion to negative (ctDNA+/-) will receive a de-escalated treatment with CAPE for 3 months. 3 LB will be performed within 3 months and in case of positivity the patient will be switched to FOLFIRI. Patients with ctDNA-/- will be subjected to an interventional follow-up comprising 2 further LB and in case of positivity they will be switched to CAPOX treatment. PEGASUS is piggybacked to AlfaOmega (NCT04120935), a Master Observational Protocol that will follow patients from diagnosis to 5 years or recurrence/death (whichever comes first), collecting clinical data, radio-images and biological samples. AlfaOmega provides a clinical and logistic ecosystem for the seamless integration of PEGASUS clinical results with the biological underpinning of colon cancer. ;

Study Design

Related Conditions & MeSH terms

Clinical Trial Details
NCT number NCT04259944
Study type Interventional
Source IFOM ETS - The AIRC Institute of Molecular Oncology
Contact
Status Active, not recruiting
Phase Phase 2
Start date June 16, 2020
Completion date October 15, 2024
View Details
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