Active clinical trials for "Hepatitis B, Chronic"

This study will evaluate the safety and immunogenicity of a novel mixed plasmid DNA (HB-110) combined with an antiviral agent (Adefovir) for the patients with chronic Hepatitis B infection.

The main objective of the study was to evaluate the antiviral activity of tenofovir disoproxil fumarate (tenofovir DF) monotherapy versus emtricitabine (FTC) plus tenofovir DF combination therapy for the treatment of chronic hepatitis B (HBV) in participants in the immune tolerant phase of HBV infection. The efficacy of tenofovir DF monotherapy versus FTC plus tenofovir DF combination therapy was evaluated for suppression of the virus (decrease in HBV DNA), serological response (generation of antibodies to the virus), biochemical response (changes in liver enzymes), and the development of drug-resistant mutations. The safety and tolerability of both tenofovir DF monotherapy and FTC plus tenofovir DF were evaluated by routine monitoring for adverse events and changes in laboratory parameters. Participants were randomized in a 1:1 ratio to receive tenofovir DF monotherapy or FTC plus tenofovir DF. All subjects were to continue on blinded study medication until the last subject reached Week 192. Participants who permanently discontinued study drug (on or before Week 192) were followed for a 24-week treatment-free follow-up period, or until initiation of alternative HBV therapy, whichever occurred first. Subjects who discontinued study drug on or after Week 48 because of hepatitis B surface antigen (HBsAg) loss or seroconversion to antibody to hepatitis B surface antigen (anti-HBs), however, were to have returned for their regularly scheduled through Week 192 and every 16 weeks thereafter until the last subject reached Week 192.

This 48-week open-label study of local manufactured adefovir dipivoxil Tablet evaluates the efficacy and safety of adefovir 10mg once daily in Chinese subjects with compensated CHB. Primary endpoint is proportion of subjects achieving HBV DNA undetectable (<=1000 copies/mL by by Roche COBAS AMPLICOR HBV MONITOR Test) at week 48. Approximately 1250 patients will be recruited in 30 study centers in China. The subjects are offered 48 weeks of open label adefovir dipivoxil treatment, with assessments every three months, after with is a 12-week post study treatment follow-up prior to study completion.

This 2 arm study will evaluate the efficacy and safety of intermittent treatment with PEGASYS in HBeAg negative patients with chronic hepatitis B who have demonstrated virological and biochemical response after treatment with interferon alfa. After 48 weeks therapy with interferon alfa, and 24 weeks treatment-free follow-up, eligible patients will be randomized into the PEGASYS or the observational group. Those in the PEGASYS group will receive 4 therapeutic cycles of long term intermittent treatment with PEGASYS (135 micrograms sc weekly for 12 weeks, followed by a treatment-free period of 12 weeks) and those in the observational arm will receive no specific antiviral treatment. The anticipated time on study treatment is 1-2 years, and the target sample size is 100 individuals.

This single-arm study will evaluate the efficacy and safety of peginterferon alfa-2a in treatment-naive Baltic participants with Hepatitis B envelope antigen (HBeAg)-positive chronic Hepatitis B virus (HBV). All participants will receive peginterferon alfa-2a 180 micrograms (mcg) subcutaneously once weekly. Following 48 weeks of treatment, there will be a 24 week period of treatment-free follow-up. The anticipated time on study treatment is 3-12 months, and the target sample size is less than 100 participants.

In earlier clinical studies, when patients who have been on lamivudine (LAM) were switched to adefovir dipivoxil (ADV), some patients developed ALT flares with an elevation of ALT > 10 x the upper limits of normal (ULN). There were no cases of hepatic decompensation with the flares, however. The transition methods were varied among physicians from no overlapping to overlapping for 1 to 3 months with LAM and ADV. There is still some uncertainty about the optimal approach to switching from LAM to ADV. This study will compare the safety of directly switching to ADV to a protocolled switch after a period of overlap of 12 weeks. This will facilitate pro-active switching in patients on LAM and will also highlight genotypic resistance ahead of phenotypic resistance as a reason to switch patients. Data to date have only been presented as part of a controlled study in patients with clinically evident LAM-resistance. This study will enroll patients who still have serum hepatitis B virus (HBV) DNA suppression whilst receiving LAM.

The efficacy of lamivudine in Hepatitis Be Antigen (HBeAg) positive Asian patients of chronic hepatitis has been well established.The evidence in HBeAg negative patients is limited. Limited sustained response was observed post-treatment following a one year treatment period. Whether these results can be applied to patients in Iran is uncertain. This study is therefore intended to further assess the efficacy profile after two years of open treatment in the adult Iranian population.

The purpose of this study is to determine the safety and efficacy of Pegasys + placebo + lamivudine versus lamivudine alone in patients with lamivudine versus lamivudine alone in patients with hepatitis B antigen CHB.

This is a single-centre prospective randomised study comparing the virological and histological response of HBV infection to lamivudine in combination with interferon versus lamivudine alone.

This is an extension study for patients who have previously completed Idenix Study NV-02B-003. This study is being conducted to compare the safety and effectiveness of treatment beyond 1 year of telbivudine and telbivudine combined with lamivudine, a drug currently approved for the treatment of hepatitis B.