In uncontrolled clinical studies, ursodeoxycholic acid (UDCA) had a beneficial effect on nonalcoholic steatohepatitis (NASH). However, a large controlled trial using UDCA (13-15 mg/ kg/day) was unable to confirm these results. Accordingly, a randomized, placebo-controlled study was initiated with a high dose of UDCA (23-28 mg/kg/day). The allocation of patients and the evaluation of liver histology were performed according to a modified Brunt score and the nonalcoholic fatty liver disease activity score (NAS). With the modified Brunt score, 185 patients with histologically proven NASH were randomized [intention to treat (ITT)], and 147 were treated per protocol (PP). With the NAS, 137 patients were confirmed to have NASH, 48 had borderline NASH, and 1 did not have NASH. The treatment time was 18 months. At entry, the treatment groups were comparable. A second biopsy sample was obtained from 139 of 185 patients (NAS: 107/137). The primary criterion for evaluation was a change in the liver histology; the secondary criteria were single histological variables and liver biochemistry. Significant differences in the overall histology could not be detected between the two treatment groups with the modified Brunt score (P 5 0.881) or NAS (P 5 0.355). Only lobular inflammation improved significantly (P for the modified Brunt score 5 0.011, P for NAS 5 0.005). In subgroup analyses, significant improvements in lobular inflammation were also observed in males, younger patients up to 50 years of age, slightly overweight patients, and patients with hypertension and an increased histology score. The fibrosis score did not change (P for ITT 5 0.133, P for PP 5 0.140). With the exception of cglutamyl transferase, UDCA did not improve laboratory data. Conclusion: High-dose UDCA failed to improve the overall histology in patients with NASH in comparison with placebo.

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Background-In some patients with primary biliary cirrhosis, ursodeoxycholic acid causes full biochemical normalisation of laboratory data; in others, indexes improve but do not become normal. Aims-To characterise complete and incomplete responders. Methods-Seventy patients with primary biliary cirrhosis were treated with ursodeoxycholic acid 10-15 mg/kg/day and followed up for 6-13 years. Results-In 23 patients (33%) with mainly stage I or II disease, cholestasis indexes and aminotransferases normalised within 1-5 years, except for antimitochondrial antibodies. Histological findings improved. Indexes were not normalised in 47 patients (67%) although the improvement of their biochemical functions parallelled the trend in the first group. In these incomplete responders histological findings improved to a lesser extent. The only diVerence between the two groups before treatment was higher levels of alkaline phosphatase and glutamyl transpeptidase in the incomplete responders. At onset of treatment the discriminant value separating responders from incomplete responders was 660 U/l for alkaline phosphatase and 131 U/l for glutamyl transpeptidase. One year later it was 239 and 27 U/l (overall predictive value for responders 92%, for incomplete responders 81%). There were no diVerences between the two groups concerning immune status, antimitochondrial antibody subtypes, liver histology, or any other data. HLA-B39, DRB1*08, DQB1*04 dominated in both groups. Conclusions-In patients with mainly early stages of primary biliary cirrhosis, higher values of alkaline phosphatase and glutamyl transpeptidase are the only biochemical indexes which allow discrimination between patients who will completely or incompletely respond to ursodeoxycholic acid treatment. (Gut 2000;46:121-126)