A Study to Assess the Safety, Pharmacokinetics, and Antiviral Activity of ABI-4334 in Subjects With Chronic Hepatitis B Virus Infection

A Randomized, Blinded, Placebo-Controlled Dose-Ranging Phase 1b Study of the Safety, Pharmacokinetics, and Antiviral Activity of ABI-4334 in Subjects With Chronic Hepatitis B Virus Infection

This is a randomized, blinded, placebo-controlled, dose-ranging Phase 1b study of the safety, PK, and antiviral activity of ABI-4334 in treatment-naïve or off-treatment chronic Hepatitis B virus (cHBV) subjects that are Hepatitis B e antigen (HBeAg) positive or negative. The study will enroll up to 5 sequential cohorts of 10 subjects each, for a total of up to 50 subjects, randomized 8:2 to receive ABI-4334 or placebo.

Inclusion Criteria:

1. Body mass index (BMI) ≥ 18.0 and < 35.0 kg/m(2), where BMI = weight (kg)/(height [m])(2) with a minimum body weight of 45 kg
2. Chronic hepatitis B infection, defined as HBV infection for ≥ 6 months documented
3. Treatment-naïve or off-antiviral therapy for ≥ 24 weeks prior to Screening
4. Lack of bridging fibrosis or cirrhosis

Exclusion Criteria:

1. Co-infection with human immunodeficiency virus (HIV), hepatitis C virus (HCV), hepatitis D virus (HDV), acute hepatitis A virus (HAV), or acute hepatitis E virus (HEV)
2. History of liver transplant or evidence of advanced liver disease, cirrhosis, or hepatic decompensation
3. Clinically significant diseases or conditions
4. History of hepatocellular carcinoma