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An observational study to follow clinical outcomes for the patients participated in the randomized, phase III trial of sequential capecitabine/5FU plus bevacizumab (Cape/5FU-Bmab) to capecitabine/5FU plus oxaliplatin plus bevacizumab (CapeOX/mFOLOFX6-Bmab) versus combination CapeOX/mFOLFOX6-Bmab in advanced colorectal cancer

ABSTRACT: Primary outcome(s): Final update of OS in C-cubed study. Determination of patient population to RAS/BRAF mutations.

DISEASE(S): Colorectal Cancer

PROVIDER: 2651729 | ecrin-mdr-crc |

REPOSITORIES: ECRIN MDR

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Project description:Several randomized trials have indicated that combination chemotherapy applied in metastatic colorectal cancer (mCRC) does not significantly improve overall survival when compared to the sequential use of cytotoxic agents (CAIRO, MRC Focus, FFCD 2000-05). The present study investigates the question whether this statement holds true also for bevacizumab-based first-line treatment including escalation- and de-escalation strategies.The AIO KRK 0110/ML22011 trial is a two-arm, multicenter, open-label randomized phase III trial comparing the efficacy and safety of capecitabine plus bevacizumab (Cape-Bev) versus capecitabine plus irinotecan plus bevacizumab (CAPIRI-Bev) in the first-line treatment of metastatic colorectal cancer. Patients with unresectable metastatic colorectal cancer, Eastern Cooperative Oncology Group (ECOG) performance status 0-1, will be assigned in a 1:1 ratio to receive either capecitabine 1250 mg/m(2) bid for 14d (d1-14) plus bevacizumab 7.5 mg/kg (d1) q3w (Arm A) or capecitabine 800 mg/m(2) BID for 14d (d1-14), irinotecan 200 mg/m(2) (d1) and bevacizumab 7.5 mg/kg (d1) q3w (Arm B). Patients included into this trial are required to consent to the analysis of tumour tissue and blood for translational investigations. In Arm A, treatment escalation from Cape-Bev to CAPIRI-Bev is recommended in case of progressive disease (PD). In Arm B, de-escalation from CAPIRI-Bev to Cape-Bev is possible after 6 months of treatment or in case of irinotecan-associated toxicity. Re-escalation to CAPIRI-Bev after PD is possible. The primary endpoint is time to failure of strategy (TFS). Secondary endpoints are overall response rate (ORR), overall survival, progression-free survival, safety and quality of life.The AIO KRK 0110 trial is designed for patients with disseminated, but asymptomatic mCRC who are not potential candidates for surgical resection of metastasis. Two bevacizumab-based strategies are compared: one starting as single-agent chemotherapy (Cape-Bev) allowing escalation to CAPIRI-Bev and another starting with combination chemotherapy (CAPIRI-Bev) and allowing de-escalation to Cape-Bev and subsequent re-escalation if necessary.ClinicalTrials.gov Identifier NCT01249638 EudraCT-No.: 2009-013099-38.

Project description:BackgroundCombination therapy with oral fluoropyrimidine and irinotecan has not yet been established as first-line treatment of metastatic colorectal cancer (mCRC). We carried out a randomized, open-label, phase III trial to determine whether S-1 and irinotecan plus bevacizumab is noninferior to mFOLFOX6 or CapeOX plus bevacizumab in terms of progression-free survival (PFS).Patients and methodsPatients from 53 institutions who had previously untreated mCRC were randomly assigned (1 : 1) to receive either mFOLFOX6 or CapeOX plus bevacizumab (control group) or S-1 and irinotecan plus bevacizumab (experimental group; a 3-week regimen: intravenous infusions of irinotecan 150?mg/m2 and bevacizumab 7.5?mg/kg on day 1, oral S-1 80?mg/m2 twice daily for 2?weeks, followed by a 1-week rest; or a 4-week regimen: irinotecan 100?mg/m2 and bevacizumab 5?mg/kg on days 1 and 15, S-1 80?mg/m2 twice daily for 2?weeks, followed by a 2-week rest). The primary end point was PFS. The noninferiority margin was 1.25; noninferiority would be established if the upper limit of the 95% confidence interval (CI) for the hazard ratio (HR) of the control group versus the experimental group was less than this margin.ResultBetween June 2012 and September 2014, 487 patients underwent randomization. Two hundred and forty-three patients assigned to the control group and 241 assigned to the experimental group were included in the primary analysis. Median PFS was 10.8?months (95% CI 9.6-11.6) in the control group and 14.0?months (95% CI 12.4-15.5) in the experimental group (HR 0.84, 95% CI 0.70-1.02; P?<?0.0001 for noninferiority, P?=?0.0815 for superiority). One hundred and fifty-seven patients (64.9%) in the control group and 140 (58.6%) in the experimental group had adverse events of grade 3 or higher.ConclusionS-1 and irinotecan plus bevacizumab is noninferior to mFOLFOX6 or CapeOX plus bevacizumab with respect to PFS as first-line treatment of mCRC and could be a new standard treatment.Clinical trials numberUMIN000007834.

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