Phase 3 Study of Bezafibrate in Combination With Ursodeoxycholic Acid in Primary Biliary Cirrhosis

This is a multi-center, randomized (treatment will be assigned by chance), placebo-controlled (an inactive substance will be compared with the test drug to see whether the drug has a real effect), parallel-group (two or more groups of patients will receive different treatments) study that will assess the efficacy and safety of bezafibrate in patients with primary biliary cirrhosis (PBC) who had an inadequate biochemical response to ursodeoxycholic acid, as defined by the Paris II criteria. Bezafibrate 400 mg or placebo will be daily administered in combination with ursodeoxycholic acid (UDCA) 13-15 mg/kg/d for 24 months. Patient safety will be monitored. Primary end-point will be the percentage of patients with a complete normalization of the following biochemical tests: alkaline phosphatase, aminotransferases, total bilirubin, serum albumin, and prothrombin index. Secondary endpoints will include the percentage of drug-related adverse events, survival rates without liver transplantation or liver decompensation, time course of non-invasive liver fibrosis measurements (Fibroscan, serum hyaluronic acid), time course of liver histological parameters (fibrosis stage, necro-inflammatory grade, ductopenia) assessed on percutaneous biopsy specimens, time course of endoscopic, ultrasound, and biochemical features of portal hypertension, time course of pruritus and of quality of life using validated scales.

Inclusion criteria

• Age > 18
• Patient with PBC defined by 2 in 3 of the following criteria Positive antimitochondrial antibody type M2. Abnormal serum alkaline phosphatases (ALP > 1,5N) and aminotransferase (AST or ALT > 1N) activities.

Histological hepatic injuries consistent with PBC from biopsy specimens of at least 10 mm.

• Patient treated with UDCA at the dose of 13 to 15 mg/kg/d (consistent to the AMM)
• Patients showing an incomplete biochemical response to UDCA as defined by : ALP > 1,5N or AST > 1,5N or total bilirubin >17 µmol/l (with conjugated bilirubin > 8 µmol/l) after ≥ 3 months of UDCA at the dose of 13 - 15 mg/kg/day.

Exclusion criteria

• Unsigned consent.
• Patient with no social insurance or having medical assistant of state
• Ascites or gastrointestinal bleeding (or history of these)
• Serum total bilirubinemia > 50 μmols/L (3 mg/dl) (sample < 3 months)
• Serum albuminemia < 35 g/l (sample < 3 months)
• Prothrombin index < 70% (sample < 3 months)
• Platelet count < 100000/mm3 (sample < 3 months)
• Treatment with corticosteroids, immunosuppressive agents, fibrates (or other PPAR-agonists) or statin in the last 3 months
• Any comorbidity susceptible to cause a hepatic impairment (HBV, HCV, or HIV seropositivity; excessive alcohol consumption; hemochromatosis, Wilson's disease, α1 antitrypsin deficiency; celiac disease; uncontrolled dysthyroidism; autoimmune hepatitis, inflammatory colitis)
• Any severe comorbidity decreasing life expectancy
• Intolerance or hypersensitivity to fibrates, to one of these components or other fibrates in general
• Known photosensitivity reaction to fibrates
• Pregnancy or desire of pregnancy
• Breast-feeding
• Renal failure (clearance of creatinine < 60 ml/mn)
• Patient with congenital galactosemia, syndrome of glucose malabsorption, lactase deficiency due to the presence of lactose in tablets of bezafibrate 400 mg