Elaboration of a Model for Predicting Efficacy of Monoclonal Antibodies (Cetuximab and Bevacizumab) in Patients With Colorectal Cancer and Liver Metastases
Primary Objective: This trial is elaborating a model for rapidly predicting (day 21) the response to monoclonal antibodies anti-EGFR and anti-VEGF (cetuximab and bevacizumab) based on biological markers and/or functional imaging. The response to treatment is evaluated by the conventional method after 2 months (Response Evaluation Criteria in Solid Tumors [RECIST] criteria).
- This trial is also analyzing the correlation between the magnitude of response to treatment at 2 months (stabilization or objective response, RECIST criteria) and that of response observed after 6 months of treatment.
- The organisational objective is to develop a tumour bank of metastatic colorectal cancer.
Population: The population includes 252 male and female patients with metastatic colorectal cancer justifying the use of cetuximab or bevacizumab, with no heart disease.
Techniques: Computed tomography (CT scan), functional imaging (ultrasound with SonoVue); molecular imaging (positron emission tomography [PET] with fluorodeoxyglucose F18 [18-FDG]); and biology and pathology on microbiopsy of liver metastasis are used.
Outcome Criteria: The primary outcome is response to treatment with monoclonal antibodies according to RECIST criteria at two months.
- CT scan: RECIST criteria (gold standard);
- Ultrasound with SonoVue injection: 1 representative target (delay of contrast appearance, peak of rising, curve of increase and decrease of the signal, area under the curve, time of average transit).
Nuclear Medicine: PET scan and 18-FDG (standard uptake values [SUV])
Molecular Characterization of Tumors: p53 status; microsatellite instability (MSI) status; expression of oncogenes; EGFR status; VEGF status; determination of FcgammaRIIIA polymorphisms
- Descriptive analyses;
- Analysis of the appropriate threshold to measure: response to treatment by an ultrasound with SonoVue and by PET scan; correlation between response predicted by the ultrasound with SonoVue and the PET; conventional morphological CT at 2 months
Analysis of prognostic factors:
- Evaluation of the role of each prognostic factor (pathology and imaging) on response to treatment;
- Multivariate analysis of prognostic factors;
- Analysis of the prognostic power of early response at 2 months on the response observed after 6 months of treatment.
|Study Design:||Allocation: Non-Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Treatment
|Official Title:||Elaboration of a Model for Predicting Efficacy of Monoclonal Antibodies (Cetuximab and Bevacizumab) in Patients With Colorectal Cancer and Liver Metastases|
- Elaboration of a predictive model, based on biological and functional imaging parameters, for the response to monoclonal antibodies as assessed through RECIST criteria 2 months after the beginning of treatment [ Time Frame: at 7 weeks ] [ Designated as safety issue: No ]
- Correlation between the response at 2 months and that at 6 months of treatment (taking into account the therapeutic adjustments during the 6-month follow-up) [ Time Frame: at 6 month ] [ Designated as safety issue: No ]
|Study Start Date:||May 2006|
|Study Completion Date:||October 2008|
|Primary Completion Date:||October 2008 (Final data collection date for primary outcome measure)|
Indication: first intention treatment
Other Name: Avastin
indication : second intention treatment
Other Name: Erbitux