View clinical trials related to Hepatitis A.
Filter by:HIV infected patients exposed to Hepatitis B virus are more susceptible to develop a chronic and severe liver disease, with a major risk of cirrhosis and liver cancer. However, immune response to standard Hepatitis B vaccination is decreased in HIV-infected patients, compared to non HIV-infected individuals, and, in case of response, its durability has to be carefully followed up. This study compares the efficacy of two strategies of revaccination in HIV-infected patients who didn't respond to previous hepatitis B vaccination. Failure is defined by two conditions: non response to the primary immunization (2 to 4 single-dose injections received before the screening visit) and failure to a single 20 µg boost before being included in the study.
Viral infections can profoundly influence alloimmune responses and hamper allograft tolerance induction. Persistent hepatitis C virus (HCV) infection occurs in 50% of liver and 20% of kidney transplant recipients, but the impact of HCV on the acquisition of allograft tolerance has not been elucidated. Liver transplantation constitutes a unique clinical model to address this question, given that up to 20% of liver recipients can completely discontinue immunosuppressive drugs and attain operational tolerance. The goal of our study is to determine the influence of HCV-driven immune responses on the acquisition of operational tolerance in liver transplant recipients following drug weaning, and to assess whether immunosuppression withdrawal ameliorates HCV-induced liver damage. This is a prospective trial in which immunosuppressive drug weaning will be offered to HCV-positive liver recipients (selected on the basis of a high likelihood of tolerance) as a strategy to improve HCV-mediated liver disease.
The primary purpose of this study is to assess the change in Hepatitis C Virus RNA during dosing with daclatasvir and during the follow-up period in subjects with chronic hepatitis C infection
This 3 arm study will compare the efficacy and safety of combination therapy with PEGASYS + adefovir dipivoxil (ADV) versus PEGASYS monotherapy, in HBeAg-negative chronic hepatitis B patients.Patients will be randomized to receive 1)PEGASYS 180 micrograms sc weekly + ADV 10mg po daily for 48 weeks, followed by ADV 10mg po monotherapy for an additional 48 weeks, and a further 48 week treatment-free follow-up, 2)PEGASYS 180 micrograms sc weekly + ADV 10mg po daily for 48 weeks, followed by a 96 week treatment-free follow-up, or 3)PEGASYS 180 micrograms sc monotherapy weekly for 48 weeks, followed by a 96 week treatment-free follow-up. The anticipated time on study treatment is 1-2 years, and the target sample size is <100 individuals.
This study will examine the effects of treatment for hepatitis C on atherosclerosis, or hardening of the arteries. Hepatitis C is a disease of the liver caused by a virus that can cause permanent damage to that organ. Treatment can clear the virus in at least half of patients and reduce the risk of serious complications of the disease. Atherosclerosis is an accumulation of cholesterol and fat in the arteries that can narrow blood vessels, leading to chest pain, heart attack or stroke. Because the liver controls cholesterol and fat levels in the blood, hepatitis C infection may be a risk factor for atherosclerosis by increasing cholesterol and fat in blood vessels. Treatment of the hepatitis C may reduce the risk of atherosclerosis and its consequences. This study will determine what effect hepatitis C treatment has on the rate of atherosclerosis and narrowing of blood vessels and on the risk of heart attack or stroke. Patients 30 years of age and older with current or past infection with hepatitis C may be eligible for this study. Participants undergo the following tests and procedures: - Questionnaires regarding risk factors for heart disease and stroke - Measurements of blood pressure, heart rate, weight, height, waist and hips - Blood tests - CT scans and ultrasound tests to measure the degree of blood vessel hardening and narrowing in the heart and neck region
In this study, subjects who received primary neonatal vaccination with hepatitis B vaccine at 0, 1, 2, 12 months, 20 years ago in the 103860/272 primary study will be evaluated for immunological memory to hepatitis B vaccine via assessment of the response to a vaccine challenge dose.
A Study of Albuferon with Ribavirin in Interferon Alfa Naive Subjects with Chronic Hepatitis C Genotype 2 or 3.
This study will evaluate the use of telbivudine for patients with HBeAg-positive CHB with an option to intensify treatment at Week 24 by adding tenofovir for patients who do not achieve HBV DNA non-detectability.
This study will explore efficacy and safety of Telbivudine in the fifth year of treatment.
This study has the aim of describing viral mutation profiles in patients diagnosed with chronic hepatitis B receiving antihepadnaviral therapy.