View clinical trials related to Hepatitis A.
Filter by:Hepatitis C virus (HCV) infection provokes thousands of deaths every year all over the world, being the major cause of progressive liver disease, primary hepatic cancer and liver transplantation. Today, a "curative" therapy is available, that can eradicate the viral infection and determine the regression of liver fibrosis, also in cirrhotic subjects. The current standard-of-care for HCV chronic infection is combination therapy with peginterferon (P-IFN) and ribavirin (RBV). However, this treatment is not only expensive but determines several side effects, that can reduce drug tolerance and hence, patient adherence to therapy. There are two types of available P-IFN on the market: P-IFN alfa-2a (Pegasys®, F.Hoffmann-La Roche) administered at a flat-dose of 180 mcg/week and P-IFN alfa-2b (PegIntron®, Schering-Plough) given at a weight-based dose of 50 to 150 mcg/week. Since only a single amino acid differentiates these types of IFN, administration strategies depend on their pegilation with molecules of 40 or 12kDa, respectively, that accounts for differences in the pharmacokinetic and pharmacodynamic drug-profile and influences probably also bioactivity. No comparative data are available on the benefits and costs of the licensed Peg-IFN plus RBV for the treatment of HCV infection in the real clinical practice, even if, the benefit and favourable cost-efficacy of this antiviral therapy is well established and of large consensus. Recently, the first randomized controlled mega-trial to compare antiviral therapeutic efficacy in naïve patients with HCV-genotype 1 infection during different regimens of P-IFN alfa-2b (at low and standard-dose) and P-IFN alfa-2a plus RBV, has been published, confirming a similar efficacy, of around 40%, obtained with the three schedules evaluated. In Italy, a regional program on the Surveillance and Control of HCV Infection, set up by the Regional Health Councillorship, has led to the development of a clinical and epidemiological observatory, constituted by a network of liver tertiary centres (Hepatological Cooperative Network of Veneto, HepCoVe). This collaborative group is connected on-line by a common database that, since 2003, has prospectively collected data on a cohort of more than 3000 patients with chronic HCV infection and, among them, of 506 naïve subjects that consecutively underwent combination therapy with P-IFN alfa-2a or alfa-2b plus RBV. The aim of this study was to rationalize and improve the social regional health program on antiviral treatment of chronic hepatitis C by assessing the different schedules utilization of P-IFN plus RBV as well as the respective therapeutic effectiveness, safety and costs in the real clinical practice (Project A).
The primary objective of this study is to evaluate the safety and tolerability of ascending doses of Hanferon™ in combination with ribavirin (RBV). The secondary objective of this study is to define the PK and PD of ascending doses of Hanferon™ in combination with RBV. The exploratory objective of this study is to make a preliminary assessment of Hanferon™ efficacy in combination with RBV.
The main goal of this study is to prevent liver allograft infection with Hepatitis C virus in hepatitis C positive patients undergoing liver transplantation. The hypothesis is that patients who receive ribavirin immediately before transplant and intravenous interferon alfa 2b during the anhepatic phase(while the liver is removed)will have sustained virologic response post liver transplant.
Genotype 1: Participants with genotype 1 hepatitis C (HCV) infection were randomized to receive sofosbuvir (GS-7977; PSI-7977) 200 mg or 400 mg, or matching placebo, plus pegylated interferon alfa 2a (PEG) and ribavirin (RBV) for 12 weeks, followed by PEG+RBV for an up to an additional 36 weeks. Randomization was stratified by IL28B status (CC, CT, TT) and HCV RNA level (< 800,000 IU/ml or ≥ 800,000 IU/ml) at baseline. Participants were randomized in a 2:2:1 manner; those who achieved an extended rapid virologic response (eRVR) (HCV RNA < lower limit of detection [15 IU/mL] from Weeks 4 through 12) received an additional 12 weeks of PEG+RBV. Subjects not achieving eRVR received an additional 36 weeks of PEG+RBV. Genotype 2 and 3: Participants with genotype 2 or 3 hepatitis C (HCV) received sofosbuvir 400 mg plus PEG+RBV for 12 weeks.
This study will evaluate the efficacy, safety and tolerability of danoprevir (RO5190591) plus ritonavir as compared to danoprevir alone or placebo plus ritonavir in patients with chronic hepatitis C genotype 1 receiving Pegasys (peginterferon alfa-2a) and ribavirin. Patients in cohorts will be randomized to receive either oral doses of danoprevir, or danoprevir plus ritonavir, or placebo plus ritonavir. All patients will receive Pegasys (180mcg sc once weekly) plus ribavirin (1000-1200mg/day po), with the option to continue this treatment after completion of study drug treatment. Anticipated time on study treatment is up to 12 weeks.
The study is to investigate whether HCV GT1 patients with a history of non-response/relapse to PegIFN + RBV benefit from treatment with triple therapy of DEB025 plus Peg-IFN and ribavirin compared to triple treatment with placebo matching DEB025 plus Peg-IFN and ribavirin
Background: - The hepatitis B vaccine has been shown to be safe and effective in preventing transmission of the hepatitis B virus. Response rates to the initial three doses of the vaccine are high, with significant or even complete immune response. However, this level has been reported to decline rapidly within the first year and more slowly thereafter. There is little data on the durability and long-term protection provided by the hepatitis B vaccine administered to adults in the United States. - Vaccinated individuals are believed to be protected against hepatitis B virus infection because of a memory immune response. Even if antibody levels are low, the immune system will still be able to produce enough antibody to neutralize the hepatitis B virus. Therefore, booster doses of the vaccine are not recommended, except for some high-risk individuals such as patients on dialysis. Researchers are interested in determining the durability of the immune response of the hepatitis B vaccine in adults with low or intermediate risk for hepatitis B virus infection. Objectives: - To examine the long-term immune status of human immunodeficiency virus (HIV) positive and negative individuals who received the hepatitis B vaccine during adulthood, compared with the immune status of individuals who acquired natural immunity by recovering from acute hepatitis B during adulthood. Eligibility: - Individuals at least 18 years of age who were vaccinated against hepatitis B at least 10 years ago. - Individuals at least 18 years of age who contracted and recovered from acute hepatitis B at least 10 years ago. - Individuals at least 18 years of age who have well-controlled HIV and were vaccinated against hepatitis B at least 10 years ago. Design: - Participants will have a single outpatient study visit and potential follow-up visits as part of this protocol. - Participants will complete a questionnaire assessing possible risk factors for hepatitis B infection, and will provide blood samples to test for hepatitis B antibodies and other immune system studies. - Participants will receive a letter or phone call with the results of the blood tests: - Those who no longer have protective levels of antibody against the hepatitis B virus will be offered a booster dose of the hepatitis B vaccine. To monitor immune response to the booster vaccine, additional study visits will be scheduled at 1 and 3 weeks following the booster. - Those who have chronic infection with the hepatitis B virus will be advised to follow up with their primary care physician, and may be eligible to participate in ongoing treatment trials for chronic hepatitis B. - Those who have abnormal blood tests will be referred back to their primary care physician for investigation of the abnormal tests results, and may also be referred to other National Institutes of Health protocols. - Additional tests will evaluate immune response to the measles, mumps, and rubella (German measles) viruses. Some participants may be advised to have an additional MMR vaccine through their primary care physician.
This is a single-dose, randomized, cross-sectional comparison study examining the relative safety and resulting blood level profiles after administration of a new boceprevir tablet formulation versus its current capsule formulation for treatment of chronic hepatitis C. In Part 1 of the study participants will receive boceprevir tablets and capsules under fed conditions. In Part 2 of the study a new group of participants will receive boceprevir tablets and capsules under fasted conditions.
This randomized, double-blind, placebo controlled, 3 part study will assess the safety, tolerability and pharmacokinetics of RO5303253 in healthy volunteers and patients with chronic hepatitis C genotype 1. In Part A, cohorts of healthy volunteers will be randomized to receive single ascending doses of RO5303253 or placebo. In Part 2, healthy volunteers will receive a single dose of RO5303253 or placebo in a cross-over design (with a washout period of at least 7 days) to assess food effects on pharmacokinetics. In Part 3, patients with chronic hepatitis C will be randomized ro receive either RO5303253 or placebo for 5 days.
Evaluate safety, tolerability, and antiviral response of ACH-0141625 compared to standard of care in hepatitis C virus (HCV)-positive participants.