Emricasan, a Caspase Inhibitor, for Evaluation in Subjects With Non-Alcoholic Steatohepatitis (NASH) Fibrosis

Overview

This is a multicenter, double-blind, randomized, placebo-controlled trial involving subjects with a diagnosis of "definite NASH" with fibrosis (excluding cirrhosis) as determined by the central histopathologist. Upon successful screening, subjects will be randomized to receive either emricasan 50 mg BID or emricasan 5 mg BID or matching placebo BID.

Full Title of Study: “A Multicenter, Randomized, Double-Blind, Placebo-controlled Trial of Emricasan (IDN-6556-12), an Oral Caspase Inhibitor, in Subjects With Non-alcoholic Steatohepatitis (NASH) Fibrosis”

Study Type

  • Study Type: Interventional
  • Study Design
    • Allocation: Randomized
    • Intervention Model: Parallel Assignment
    • Primary Purpose: Treatment
    • Masking: Triple (Participant, Investigator, Outcomes Assessor)
  • Study Primary Completion Date: January 29, 2019

Interventions

  • Drug: Emricasan (5 mg)
    • Subjects with Non-alcoholic Steatohepatitis (NASH) Fibrosis will be administered orally with emricasan (5 mg) twice a day.
  • Drug: Emricasan (50 mg)
    • Subjects with Non-alcoholic Steatohepatitis (NASH) Fibrosis will be administered orally with emricasan (50 mg) twice a day.
  • Drug: Placebo
    • Subjects with Non-alcoholic Steatohepatitis (NASH) Fibrosis will be administered orally with a matching placebo twice a day.

Arms, Groups and Cohorts

  • Active Comparator: Emricasan (5 mg)
    • Subjects with Non-alcoholic Steatohepatitis (NASH) Fibrosis will be administered orally with emricasan (5 mg) twice a day.
  • Active Comparator: Emricasan (50 mg)
    • Subjects with Non-alcoholic Steatohepatitis (NASH) Fibrosis will be administered orally with emricasan (50 mg) twice a day.
  • Placebo Comparator: Matching Placebo
    • Subjects with Non-alcoholic Steatohepatitis (NASH) Fibrosis will be administered orally with a matching placebo twice a day.

Clinical Trial Outcome Measures

Primary Measures

  • Fibrosis improvement by at least one stage without worsening of steatohepatitis
    • Time Frame: Week 72
    • Proportion of subjects who improve fibrosis on liver biopsy by at least one stage without worsening of steatohepatitis in the emricasan group compared to placebo

Secondary Measures

  • Steatohepatitis resolution (based on liver biopsy)
    • Time Frame: Baseline & Week 72
    • The proportion of subjects who resolve steatohepatitis without worsening of fibrosis in the emricasan group compared to placebo
  • Improvement in the Non-alcoholic fatty liver disease (NAFLD) Activity Score
    • Time Frame: Baseline & Week 72
    • The proportion of subjects who improve the NAFLD Activity Score (NAS), its components (steatosis, lobular inflammation, ballooning), and portal inflammation, in the emricasan group compared to placebo
  • Caspase 3/7 Relative Light Units and Alanine aminotransferase (ALT)
    • Time Frame: Day 1, week 4, 24, 48, and 72
    • To asses whether emricasan compared to placebo improves biomarkers Caspase 3/7 RLU and ALT Unit/Liter (U/L) in subjects with NASH fibrosis.

Participating in This Clinical Trial

Inclusion Criteria

1. Male or female subjects 18 years or older, able to provide written informed consent, and able to understand and willing to comply with the requirements of the study 2. Histological evidence of definite NASH based on NASH CLinical Research Network (CRN) criteria, as confirmed by the central histopathologist, on a liver biopsy obtained no more than 6 months prior to Day 1 3. NAFLD Activity Score (NAS) of 4 or greater with a score of at least 1 in each component of the NAS (steatosis scored 0-3, lobular inflammation scored 0-3, ballooning scored 0-2) 4. Fibrosis stage 1 (limited to 20% of subjects), stage 2, or stage 3 using the NASH CRN Histologic Scoring System a. Subjects with fibrosis stage 1 must also have diabetes mellitus or metabolic syndrome 5. Willingness to utilize effective contraception (for both males and females of childbearing potential) from Screening to 4 weeks after the last dose of study drug 6. If on vitamin E or pioglitazone, subjects must have been on a stable dose for at least 3 months prior to the biopsy (whether historical or qualifying biopsy) Exclusion Criteria:

1. Current or history of significant alcohol consumption, defined as more than 20 g/day for females and more than 30 g/day in males on average, or inability to reliably quantify alcohol consumption based on investigator's judgement 2. Use of the following drugs (which may have potential hepatotoxic effects) within 6 months prior to Day 1: amiodarone, methotrexate, tamoxifen, valproic acid, estrogens at doses greater than those used for hormone replacement or contraception, anabolic steroids, or systemic glucocorticoids for more than 4 weeks at doses greater than replacement doses 3. Uncontrolled diabetes (HbA1c ≥9%) within 60 days prior to Day 1 4. Presence of cirrhosis on liver biopsy (fibrosis stage 4 based on the central histopathologist reading) 5. Hepatitis and fibrosis more likely related to etiologies other than NASH such as: 1. alcoholic steatohepatitis 2. autoimmune hepatitis 3. hepatitis B virus (HBV) infection 4. hepatitis C virus (HCV) infection 5. primary biliary cirrhosis 6. primary sclerosing cholangitis 7. Wilson's disease 8. alpha-1-antitrypsin deficiency 9. hemochromatosis or iron overload 10. drug-induced liver disease 11. other biliary liver disease 6. ALT or AST >5 times upper limit of normal (ULN) or total bilirubin >1.5 times ULN during screening (unless subject has elevated total bilirubin due to Gilbert's as documented in the medical records) 7. Alpha-fetoprotein >200 ng/mL 8. Hemoglobin <10 g/dL 9. White blood cell count <2.0 x 10^3/mm3 10. Estimated creatinine clearance <30 mL/min 11. Current use of the following medications that are considered significant inhibitors of OATP1B1 and OATP1B3 transporters: atazanavir, cyclosporine, eltrombopag, gemfibrozil, indinavir, lopinavir, ritonavir, rifampin, saquinavir, simeprevir, telaprevir, tipranovir, or some combination of these medications 12. Symptoms of biliary colic, e.g. due to symptomatic gallstones, within the last 6 months, unless resolved following cholecystectomy 13. Inability to safely obtain a liver biopsy 14. Known human immunodeficiency virus (HIV) infection 15. Weight loss ≥ 10% within 6 months of Day 1 16. Use of controlled substances (including inhaled or injected drugs) or non-prescribed use of prescription drugs within 1 year of screening to the point of interfering with the subject's ability to comply with study procedures and study drug administration in the investigator's judgement 17. History of or active malignancies, other than those successfully treated with curative intent and believed to be cured 18. Significant systemic or major illness other than liver disease that in the opinion of the investigator would preclude the subject from participating in and completing the study, including but not limited to acute coronary syndrome or stroke within 6 months of screening or major surgery within 3 months of screening 19. History or presence of clinically concerning cardiac arrhythmias, or prolongation of Screening (pre-treatment) QTcF interval >480 milliseconds (msec) 20. Prior or planned (during the time frame of the study) bariatric surgery 21. If female: planned or known pregnancy, positive urine or serum pregnancy test, or lactating/breastfeeding 22. Previous treatment with emricasan or active investigational medication in a clinical trial within 6 months prior to Day 1 23. Prior liver transplant

Gender Eligibility: All

Minimum Age: 18 Years

Maximum Age: N/A

Are Healthy Volunteers Accepted: No

Investigator Details

  • Lead Sponsor
    • Conatus Pharmaceuticals Inc.
  • Provider of Information About this Clinical Study
    • Sponsor
  • Overall Official(s)
    • Jean L Chan, MD, Study Chair, Conatus Pharmaceuticals Inc.

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