Active clinical trials for "Hepatitis A"

Hepatitis B is a vaccine preventable infection which can be transmitted through occupational exposure. Approximately 15% of patients will not respond to an initial series of vaccination. Of those re-vaccinated approximately fifty percent will respond. On the basis of poor response to a third series, repeat vaccination is not recommended and non-responders are considered vulnerable to infection. Cardell studied the use of double dose combination hepatitis A and B vaccine (Twinrix) in non responders who had received four or more doses previously and found a high response rate suggesting this vaccine and dose could be effective. The investigators study seeks to duplicate the findings of Cardell, using a more strict definition of non-responder (6 or more previous doses).

Patients with HCV genotype 1 and IL28B CC Polymorphism who have a rapid virological response to treatment are randomised to either 24 or 48 weeks HCV treatment. Our hypothesis is that there is no important difference in effect between the two treatment effect.

In Korea, the number of suboptimal responders to rescue combination therapy is also increasing. As a matter of fact, according to the investigations in Korea, HBV DNA undetectability at 48 weeks of adefovir and lamivudine combination rescue therapy for patients with lamivudine resistance was reported to be only 32.4%, which suggested that the appropriate another rescue therapy might be urgently required. However, there is no promising oral antiviral agents to control these patients in Asia-Pacific region, where tenofovir is not widely available. Tenofovir has a higher potent antiviral efficacy and a negligible drug resistance rate. The switch from adefovir to tenofovir in patients who have insufficient hepatitis B virus (HBV) suppression (HBV DNA ≥ 60 IU/mL by PCR) may lead to increased viral suppression or more HBeAg loss/seroconversion. Here, the investigators aimed to conduct a randomized study on evaluating the antiviral efficacy, safety, and tolerability of switching from adefovir to tenofovir in chronic hepatitis B patients who have suboptimal response to adefovir-based combination rescue therapy due to nucleoside analogues Resistance (SATIS study).

This prospective, multicenter, observational study will evaluate the sustained response in patients with HBeAg positive chronic hepatitis B who are treated with Pegasys according to standard of care and in line with the current local labeling in routine clinical practice in Vietnam. Eligible patients will be followed for the duration of their treatment and for up to 2 years thereafter.

Currently, seven medications are approved for the treatment of hepatitis B: two formulations of interferon and five nucleons(t)ide analogues. The current treatment strategy of chronic hepatitis B is now standard: initial selection of entecavir, tenofovir, or peginterferon alfa-2a (peg-IFNα-2a). Interferon is administered for a finite duration while nucleotide analogues are usually administered for many years. But among hepatitis B e antigen （HBeAg） positive patients with high serum hepatitis B virus DNA levels, the rates of virological response are poor. And antiviral drug resistance is a major limiting factor to the success of nucleotide analogue treatment. Therefore, combination therapy using peginterferon with an oral agent with a high genetic barrier to resistance might be superior to standard current monotherapy. However, the addition of lamivudine to peg-IFNα-2a therapy led to a greater decrease in serum HBV DNA levels during treatment but did not increase the rate of HBeAg sero¬conversion. Entecavir is a nucleoside analogue superior to lamivudine and adefovir in achieving higher virological response, histological improvement and normalisation of ALT. Moreover, Entecavir has a high genetic barrier with a very low incidence of drug resistance. This study is aimed to investigate the efficacy of combination or sequential therapy using peg-IFNα-2a and entecavir in HBeAg-positive chronic hepatitis B(CHB) patients.

The aim of this study is to compare two therapeutical strategies concerning the combination therapy (peginterferon alfa-2a and ribavirin) in naïve patients with chronic hepatitis C of genotype 1. "Reference" strategy corresponding to standards of care recommended by the French consensus conference versus "Test" strategy corresponding to adaptation strategy of ribavirin dose during the first week according to AUC (area under the curve) of ribavirin plasmatic concentration after the first intake (Day 0) of 600 mg

Evaluate the safety, tolerability, and virologic activity of escalating single (and multiple) doses of XTL6865, a mixture (1:1) of two human monoclonal antibodies (HCV-AbXTL68 and HCV-AbXTL65), in patients with chronic hepatitis C virus infection. Assess the pharmacokinetics of XTL6865 in the presence and absence of viral infection.

The objective of this study is to undertake an initial evaluation of the safety, tolerability, antiviral effect, and pharmacokinetics of celgosivir in combination with peginterferon alfa-2b and ribavirin in patients with chronic HCV infection.

Study purpose: To investigate whether ALT rebound following corticosteroid priming enhances response to telbivudine therapy. Efficacy assessments: The primary endpoint will be the 1-year HBe-Ag seroconversion rate with or without prednisolone priming. Data analysis: A summary table will be presented as frequency tables for categorical variables as number, and percentage, whereas descriptive tables for continuous variables as number, mean ± SD and median (minimum, maximum). All statistical assessments will be two-sided and evaluated at significance level of 0.05. Continuous variables will be analyzed using t-test, or ANOVA, and categorical variables will be analyzed using chi-square or Fisher's exact test. A non-parametric method, Wilcoxon rank-sum or sign-rank tests will be conducted for continuous, and categorical variables if data is far from normal distribution.

Open-label studies, anecdotal reports, and in vitro scientific research indicate that 4-methylumbelliferone (active ingredient of the dietary supplement Heparvit®) may prevent and reverse the symptoms and complications of chronic infection with hepatitis B virus (HBV)and hepatitis C virus (HCV). This effect has been observed among naïve patients as well as those who are non-responders to interferon, commonly used as first-line therapy for HBV and HCV. In order to scientifically address the efficacy of this 4-methylumbelliferone on chronic viral hepatitis, a randomized, placebo-controlled, blinded study is needed. It is hypothesized that 4-methylumbelliferone may reduce the impact and aggressiveness of HBV and HCV upon the liver, thereby slowing the progression to potentially life threatening liver diseases such as cancer and cirrhosis. This is a preliminary study designed to determine any indications under controlled conditions that may warrant further detailed clinical studies.