Effects of Eicosapentaenoic Acid on Subjects at High Risk for Colorectal Cancer

Twenty patients with long-standing ulcerative colitis undergoing the usual colonoscopic surveillance + biopsy sampling will be recruited. At entry six extra biopsy samples will be collected from the colon. We will also collect blood (for serum, plasma and red cells isolation), urine and stools. Subjects will then receive 2 g/day of Eicosapentaenoic Acid (ALFA ™, SLA Pharma AG, Switzerland) as a supplement for 90 days. At the end of the study each subject will undergo sigmoidoscopy for the collection of 6 biopsies. Blood, urine and stools will be obtained prior to the procedure.