5 Clinical Trials for Various Conditions
Background: - Chronic infection with the hepatitis B virus may lead to cirrhosis, liver disease, and cancer of the liver. There is no cure for the infection, but several drugs have been approved to treat it. These drugs can keep the virus levels low. They seem to be safe for short-term use. But the drugs have not yet been approved for long-term use because some of them can have serious side effects. However, stopping treatment too soon can make the infection worse and may lead to more serious forms of liver disease. Researchers have not been able to determine a when to stop treatment. They want to study people with chronic hepatitis B infection to find out the best time to stop treatment and prevent the disease from causing further liver damage. Objectives: * To study the safety and effectiveness of withdrawing antiviral treatment for chronic hepatitis B after at least 4 years of treatment. * To determine whether stopping long-term antiviral treatment for chronic hepatitis B makes the infection worse. Eligibility: - People who are at least 18 years of age; have been taking antiviral drugs to treat chronic hepatitis B for at least 4 years; and are being evaluated to stop treatment. Design: * Those in the study will be screened with a physical exam, medical history, questionnaire, and blood tests. They will remain under the care of their regular doctor during the study. * They will have an abdominal ultrasound to study scarring in the liver, if they have not had one in the past year. * Those without detectable levels of the hepatitis B virus in their blood will stop antiviral treatment. They will have monthly blood tests for the first 6 months to check virus levels, and then every 3 months afterward. * Those whose blood tests show an increase in virus levels will restart antiviral treatment as directed by the study doctors and their personal doctor. * All those in the study will be monitored until the end of the study.
Open-label, extension study to evaluate the safety and efficacy of combination therapy and its effect on sustained viral response biomarkers.
The investigators' research is aimed at developing more effective, finite approaches for managing individual patients with chronic hepatitis B (CHB). This prospective clinical and basic scientific study exclusively focuses on patients with the early antigen negative form of disease, which in developed countries is treated indefinitely with antiviral drugs. The investigators' study "BeNEG-DO," directly offers patients who are already taking standard oral Hepatitis B Virus (HBV) antiviral therapy for at least 192 weeks the option to stop or continue treatment. Drawing on data from pilot studies, including the investigators' own University of California, San Francisco and Sutter Institutional Review Board-approved study, the investigators will examine a finite HBV treatment strategy on clinical outcome and safety. In conjunction, the investigators will study immunologic mechanisms and gene expression profiles that correlate with and predict the post-treatment clinical course. The BeNEG-DO study could seriously question, and potentially change, the current treatment paradigm for millions of patients with CHB and also lead to new disease-terminating antiviral therapeutics.
The purpose of this clinical research study is to assess the safety and effectiveness of entecavir, as compared to lamivudine, in the treatment of adults with chronic hepatitis B infection who are hepatitis B e antigen negative.
The primary objective of this study is to compare the efficacy, safety, and tolerability of tenofovir alafenamide (TAF) versus tenofovir disoproxil fumarate (TDF) in treatment-naive and treatment-experienced adults with hepatitis B e antigen (HBeAg)-negative chronic hepatitis B virus (HBV) infection.