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A Study of RO5083945 in Combination With FOLFIRI Versus FOLFIRI Plus Cetuximab or FOLFIRI Alone as Second Line Treatment in Patients With Metastatic Colorectal Cancer

ABSTRACT: Primary objectives: • to gather preliminary evidence of superior activity, of RO5083945 added to FOLFIRI versus FOLFIRI + cetuximab in terms of progression free survival (PFS) in patients with KRAS WT colorectal cancer • to gather preliminary evidence of superior activity, of RO5083945 added to FOLFIRI versus FOLFIRI alone in terms of progression free survival (PFS) in patients with KRAS mutant colorectal cancer Primary endpoints: The primary variable is PFS defined as the time between randomization and date of first documented disease progression or death, whichever occurs first.

DISEASE(S): Colorectal Cancer Metastatic,Metastatic Colorectal Cancer, Kras Wild-type (wt) Or Mutant, With Disease Progression After First Line Treatment With An Oxaliplatin-containing Regimen

PROVIDER: 2528754 | ecrin-mdr-crc |

REPOSITORIES: ECRIN MDR

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Project description:KRAS mutation is a negative predictive factor for treatment with anti-epidermal growth factor receptor (EGFR) antibodies in metastatic colorectal cancer (mCRC). Novel predictive markers are required to further improve the selection of patients for this treatment. Here, we assessed the influence of modification of KRAS by gene copy number aberration (CNA) and microRNAs (miRNAs) in correlation to clinical outcome in mCRC patients treated with cetuximab in combination with chemotherapy and bevacizumab. Formalin-fixed paraffin-embedded primary tumour tissue was used from 34 mCRC patients in a phase III trial, who were selected based upon their good (n=17) or poor (n=17) progression-free survival (PFS) upon treatment with cetuximab in combination with capecitabine, oxaliplatin, and bevacizumab. Gene copy number at the KRAS locus was assessed using high resolution genome-wide array CGH and the expression levels of 17 miRNAs targeting KRAS were determined by real-time PCR. Good response was associated with 12p12.1 copy number loss, even in patients with a KRAS mutation, while copy number gain in wild-type KRAS patients was correlated with a poor response. In KRAS mutated tumours increased miR-200b and decreased miR-143 expression were associated with a good response. In wild-type KRAS patients, miRNA expression did not predict response in a multivariate model. Thus, assessment of KRAS CNA and miRNAs targeting KRAS might further optimize the selection of patients eligible for anti-EGFR therapy. Copy number detection was performed using NimbleScan and Nexus software Formalin-fixed paraffin-embedded primary tumour tissue was used from 34 metastisized colorectal cancer patients in a phase III trial (CKTO 2005-02; ClinTrials.gov NCT00208546) of the Dutch Colorectal Cancer Group (DCCG), who were selected based upon their good (n=17) or poor (n=17) progression-free survival (PFS) upon treatment with cetuximab in combination with capecitabine, oxaliplatin, and bevacizumab.

Dataset Information

A Study of RO5083945 in Combination With FOLFIRI Versus FOLFIRI Plus Cetuximab or FOLFIRI Alone as Second Line Treatment in Patients With Metastatic Colorectal Cancer

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