RT Journal Article SR Electronic T1 A large-scale, multicentre, double-blind trial of ursodeoxycholic acid in patients with chronic hepatitis C JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 1747 OP 1753 DO 10.1136/gut.2007.120956 VO 56 IS 12 A1 Masao Omata A1 Haruhiko Yoshida A1 Joji Toyota A1 Eiichi Tomita A1 Shuhei Nishiguchi A1 Norio Hayashi A1 Shiro Iino A1 Isao Makino A1 Kiwamu Okita A1 Gotaro Toda A1 Kyuichi Tanikawa A1 Hiromitsu Kumada YR 2007 UL http://gut.bmj.com/content/56/12/1747.abstract AB Background: Combined pegylated interferon and ribavirin has improved chronic hepatitis C (CH-C) therapy; however, sustained virological response is achieved in only about half of the patients with a 1b genotype infection. We assessed oral ursodeoxycholic acid (UDCA) on serum biomarkers as a possible treatment for interferon non-responders.Methods: CH-C patients with elevated alanine aminotransferase (ALT) were assigned randomly to 150 (n = 199), 600 (n = 200) or 900 mg/day (n = 197) UDCA intake for 24 weeks. Changes in ALT, aspartate aminotransferase (AST) and gamma-glutamyl transpeptidase (GGT) were assessed. This study is registered at ClinicalTrial.gov, identifier NCT00200343.Results: ALT, AST and GGT decreased at week 4 and then remained constant during drug administration. The median changes (150, 600 and 900 mg/day, respectively) were: ALT, −15.3, −29.2 and −36.2%; AST, −13.6, −25.0 and −29.8%; GGT, −22.4, −41.0 and −50.0%. These biomarkers decreased significantly less in the 150 mg/day than in the other two groups. Although changes in ALT and AST did not differ between the 600 and 900 mg/day groups, GGT was significantly lower in the 900 mg/day group. In subgroup analysis, ALT decreased significantly in the 900 mg/day group when the baseline GGT exceeded 80 IU/l. Serum HCV-RNA did not change in any group. Adverse effects were reported by 19.1% of the patients, with no differences between groups.Conclusions: A 600 mg/day UDCA dose was optimal to decrease ALT and AST levels in CH-C patients. The 900 mg/day dose decreased GGT levels further, and may be preferable in patients with prevailing biliary injuries.