Study to Evaluate the Antiviral Efficacy, Safety and Tolerability of Tenofovir Disoproxil Fumarate Versus Placebo in Pediatric Participants With Chronic Hepatitis B Infection
Chronic Hepatitis B
About this trial
This is an interventional treatment trial for Chronic Hepatitis B
Eligibility Criteria
Key Inclusion Criteria:
- Male or Female, 2 to < 12 years of age
- Weight ≥ 10 kg
- Chronic HBV infection ≥ 6 months
- Hepatitis B e antigen (HBeAg)-positive or HBeAg-negative
- HBV Viral Load ≥ 100,000 copies/mL
- Alanine aminotransferase (ALT) ≥ 1.5 x the upper limit of the normal range (ULN) at screening
- Creatinine Clearance ≥ 80 mL/min/1.73m^2
- Absolute neutrophil count (ANC) ≥ 1,500/mm^3, hemoglobin ≥ 10 g/dL
- Negative pregnancy test at screening
- No prior tenofovir DF therapy (participants may have received prior interferon-alfa and/or other oral anti-HBV nucleoside/nucleotide therapy; participants must have discontinued interferon-alfa therapy ≥ 6 months prior to screening; participants experienced on other anti-HBV nucleoside/nucleotide therapy must have discontinued therapy ≥ 16 weeks prior to screening to avoid flare if randomized to the placebo arm)
Key Exclusion Criteria:
- Pregnant or lactating
- Decompensated liver disease
- Received interferon therapy within 6 months of screening
- Received anti-HBV nucleoside/nucleotide therapy within 16 weeks of screening
- Alpha-fetoprotein levels > 50 ng/mL
- Evidence of hepatocellular carcinoma (HCC)
- Co-infection with human immunodeficiency virus (HIV), acute hepatitis A virus (HAV), hepatitis C virus (HCV), or hepatitis D virus (HDV)
- Chronic liver disease not due to HBV
- History of significant renal, cardiovascular, pulmonary, neurological or bone disease
- Long term non-steroidal, anti-inflammatory drug therapy
Note: Other protocol defined Inclusion/Exclusion criteria may apply
Sites / Locations
- Phoenix Children's Hospital
- University of California, San Francisco
- Children's Hospital Colorado
- Cincinnati Children's Hospital Medical Center
- Texas Children's Hospital
- Nirmal Hospital Private Limited
- Medanta -The Medicity
- Colors Children Hospital
- SMS Medical College and Hospital
- M.V. Hospital and Research Centre 314/30 Mirza Mandi Chowk
- St. John Hospital & Medical Center
- Pusan National University Yangsan Hospital
- Kyungpook National University
- Asan Medical Center
- Samsung Medical Center
- Severance Children's Hospital
- Grigore Alexandrescu Emergency Clinical Hospital for Children
- Fundeni Clinical Institute - Constantinesco
- Victor Babes Clinical Hospital of Infectious Diseases and Pneumophtisology
- National Taiwan University Hospital
- Taipei Veterans General Hospital
Arms of the Study
Arm 1
Arm 2
Arm 3
Arm 4
Experimental
Placebo Comparator
Experimental
Experimental
Tenofovir DF (Blinded Randomized Treatment)
Placebo to match TDF (Blinded Randomized Treatment)
Tenofovir DF (Open-label Treatment)
Tenofovir DF (Open-label Extension Phase)
Participants will receive tenofovir disoproxil fumarate (tenofovir DF; TDF) for 72 weeks (protocol amendment 2) or 48 weeks (protocol amendment 3).
Participants will receive TDF placebo for 72 weeks (protocol amendment 2) or 48 weeks (protocol amendment 3).
Following 72 weeks (protocol amendment 2) or 48 weeks (protocol amendment 3) of blinded randomized treatment, participants will switch to open-label TDF treatment for an additional 120 weeks (protocol amendment 2) or 144 weeks (protocol amendment 3).
Following the completion of study at Week 192, participants may have the option to receive open-label TDF until it is commercially available in that country for treatment of chronic HBV in participants of their age and weight.