Colon Cancer Clinical Trial
Official title:
A Randomised Placebo-controlled Phase III Trial of the Effect of the Omega-3 Fatty Acid Eicosapentaenoic Acid (EPA) on Colorectal Cancer Recurrence and Survival After Surgery for Resectable Liver Metastases
A significant proportion of patients who undergo liver surgery to remove bowel cancer that has spread to the liver (metastases) develop disease recurrence and die from the disease. A previous small study (the EMT study) suggested a possible survival benefit in patients who took the naturally-occurring omega-3 fatty acid EPA (a fish oil supplement) before liver surgery. The EMT2 study is a larger study which will recruit 448 men and women with liver metastases from bowel cancer. Trial participants will receive either Icosapent Ethyl (pure EPA derived from fish oil) or placebo (dummy capsules). EMT2 will investigate whether patients who take this supplement before liver surgery and for up to four years after surgery, remain free of recurrence for longer than those who take placebo (dummy capsules)
Despite significant advances in diagnosis and treatment of colorectal cancer (CRC), it remains the second most common cause of cancer-related death in the UK. The majority of deaths from CRC are related to distant metastasis, predominantly to the liver. Overall 5-year survival following liver resection and adjuvant chemotherapy for colorectal cancer liver metastases (CRCLM) is, at best, 40-60%. Despite surgery with curative intent, up to 60% of patients develop recurrence within 2 years of surgery. The preliminary EMT study was a Phase II RCT of EPA 2 g daily in patients (n=88) undergoing liver resection surgery for CRCLM. Although there was no difference in the primary endpoint (tumour proliferation index), metastases from the EPA arm had a lower vascularity score (suggesting possible anti-angiogenic activity) than placebo-treated tumours. Although EPA (or placebo) treatment was limited to the pre-operative period, overall survival (OS) and disease-free survival (DFS) were specified as exploratory end-points on the basis that oral dosing with EPA before liver surgery would provide tissue EPA exposure in the immediate peri-operative period with prolonged bioavailability in the post-operative period due to the slow tissue 'washout' kinetics of EPA. Survival analysis demonstrated that the median DFS in the EPA group was 22.6 months compared with 14.7 months in the placebo group. Any DFS benefit was explained by a reduction in CRC recurrence from 12 months after surgery onwards. The EMT2 study is a randomised, double-blind, placebo-controlled, multi-centre, phase III trial of the omega-3 fatty acid (O3FA) eicosapentaenoic acid (EPA) as the ethyl ester (icosapent ethyl [IPE; Vascepa®]) in patients undergoing liver resection surgery for colorectal cancer liver metastasis (CRCLM) with curative intent designed to determine whether EPA treatment improves Progression-Free Survival (PFS). A key secondary objective is overall survival (OS). Investigators will recruit adult individuals listed for CRCLM resection with curative intent. Randomisation will be 1:1 to receive either IPE capsules or placebo capsules. 4 capsules per day containing IPE (equivalent to 4 g EPA-ethyl ester [EE] daily) or 4 placebo capsules per day. Participants will start treatment a prior to CRCLM surgery and will continue to receive treatment for a minimum of 2 years and a maximum of 4 years post-liver resection. Participants are followed up for 60 days beyond the end of treatment. Participants are clinically assessed 6 months post-operatively (from liver resection) and at 6-monthly intervals thereafter for disease progression/recurrence. ;
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