Correlation Between Circulating Tumour Markers Early Variations and Clinical Response in First Line Treatment of Metastatic Colorectal Cancer (COCA-MACS)

April 13, 2026 updated by: University Hospital, Rouen

The chemotherapy monitoring is currently based on radiological (RECIST 1.1 guideline) and clinical evaluation every 3 months. Circulating markers as Carcino Embryonic Antigen (CEA), circulating tumour DNA and total cell free DNA represent an alternative approach to evaluate the response. In the field of metastatic colorectal cancer (mCRC) recent studies suggest that early evaluation could be clinically relevant. Indeed, early tumoral response seems to be correlated to overall survival. Moreover, post-operative morbidity increases with the number of prior chemotherapy treatments. Early evaluation could allow to modify chemotherapy regimens when response appears to be insufficient.

The aim of the present study is to evaluate, in a prospective cohort of patients treated with systemic IV chemotherapy (5 Fluorouracil +/- oxaliplatin +/- irinotecan) +/- targeted therapy as first line treatment for a mCRC, the correlation between early variations of circulating tumour markers including CEA, circulating tumour DNA and total cell free DNA, and the 3 months objective response as defined in the RECIST 1.1 guideline.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

74

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • France
      • Rouen, France
        • Rouen University Hospital

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Male or female, age superior to 18 years.
  • Histologically confirmed metastatic colorectal adenocarcinoma.
  • Measurable disease according to the RECIST 1.1 guideline
  • ECOG performance status <3.
  • Disease requiring IV chemotherapy (5 Fluorouracil +/- oxaliplatin +/- irinotecan) +/- targeted therapy (cetuximab or panitumumab or bevacizumab) every 14 days
  • No prior chemotherapy for this adenocarcinoma with the exception of adjuvant chemotherapy
  • Signed and dated informed consent document.

Exclusion Criteria:

  • Medical history of cancer within 5 years
  • Medical contraindication for a treatment consisted of IV chemotherapy (5 Fluorouracil +/- oxaliplatin +/- irinotecan) +/- targeted therapy (cetuximab or panitumumab or bevacizumab)
  • Patient with known psychiatric or substance abuse disorders that could interfere with cooperation with the requirements of the study

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Diagnostic
  • Allocation: N/A
  • Interventional Model: Single Group Assignment

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Patients Treated for Metastatic Colorectal cancer
Blood sampling for free mutant DNA analysis for Patients Treated for Metastatic Colorectal cancer
Procedure: Blood sampling for free mutant DNA analysis
Blood sampling for Patients Treated for Metastatic Colorectal cancer

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Difference from baseline in the number of free mutant DNA in blood
Time Frame: 5 weeks
Variation of free mutant DNA kinetic at week 5 to predict tumor progression at 3 months (Evaluation based on the RECIST 1.1 guideline)
5 weeks

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Difference from baseline in the number of free mutant DNA in blood
Time Frame: 3 weeks
Variation of free mutant DNA kinetic at week 3 to predict tumor progression at 3 months (Evaluation based on the RECIST 1.1 guideline)
3 weeks
Evaluation of response based on the RECIST 1.1 guideline
Time Frame: 3 Months
sensitivity and specificity of free mutant DNA kinetic at Week 5 (RECIST) to predict tumor progression at 3 months (RECIST)
3 Months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

University Hospital, Rouen

Investigators

  • Principal Investigator: Alice GANGLOFF, MD, University Hospital, Rouen

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

July 18, 2016

Primary Completion (Actual)

August 10, 2020

Study Completion (Actual)

August 10, 2020

Study Registration Dates

First Submitted

August 16, 2016

First Submitted That Met QC Criteria

August 16, 2016

First Posted (Estimated)

August 19, 2016

Study Record Updates

Last Update Posted (Actual)

April 16, 2026

Last Update Submitted That Met QC Criteria

April 13, 2026

Last Verified

April 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 2015/076/HP

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

UNDECIDED

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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