View clinical trials related to Hepatitis B.
Filter by:The World Health Organization recommends that all high endemic countries for HBV infection based their mother to child transmission prevention strategies on vaccination of all children and administration of immunoglobulins (HBIG) to infants born to infected mothers in the first 24 hours after birth. Lack of access to antenatal screening and to HBIG significantly results in failure of this strategy in many countries. Moreover, despite sero-vaccination, 10 to 15% of infants of mothers that are positive for HBsAg and HBeAg are still infected, as high levels of HBV replication occurring in the third quarter of pregnancy act as a major risk factor. The objective of this study is to assess the effectiveness of an operational strategy to prevent HBV mother-to-child transmission (MTCT) in Cambodia based on the use of rapid tests HBs Ag and HBe Ag to screen HBV infection and a treatment by TDF for patients with a positive HBeAg test with a "test and treat" strategy for those seen for Antenatal Care (ANC) from 24 weeks of amenorrhea. In all cases, vaccination of the newborn will be carried out according to the national protocol in Cambodia i.e. 4 injections at 24 hours, 6, 10 and 14 weeks of age. A phase IV multicenter observational and interventional non randomized prospective study will be conducted in 4 maternity in Cambodia. The primary outcome will be the proportion of active HBV infection in new-born at 6 months of life estimated by HBs Ag positivity. The study will aim to document the acceptability and the operational implementation of the study using rapid tests usable in all health centers and a drug available in all the country thanks to HIV national program. The results will be helpful for Cambodian government in order to implement guidelines and algorithm follow-up for HBV-infected pregnant women.
The goals of this clinical study are to compare the effectiveness, safety and tolerability of study drug, tenofovir alafenamide (TAF), versus placebo in teens and children with CHB and to learn more about the dosing levels in children.
Activation of the immune system against a pathogen can be considered one of the most effective interventions in the field of infectious diseases. Transgene is developing a therapeutic vaccine "TG1050" for the treatment of patients with chronic and treated Hepatitis B. This biotherapy compound is for the development of T cellular immune response in these patients in order to achieve the total elimination of infected cells. Therefore it is necessary to have measures of ways to assess accurately and reliably the presence of such a response in the study subjects.
HBsAg Loss/Seroconversion is uncommon in Low replicative chronic HBV infection patients. The purpose of this study is to investigate the ability of peginterferon alpha to achieve HBsAg loss/seroconversion therapy in Low replicative chronic HBV infection patients with Low Level HBsAg.
This two-part, Phase 1 protocol will be the first clinical study of ABI-H0731. Part I will be a Phase 1a dose-ranging assessment of ABI-H0731 in healthy adult volunteers. If the dose-related safety, tolerability and pharmacokinetics (PK) of ABI-H0731 in human volunteers are deemed satisfactory, then the study will advance to Part II, a Phase 1b dose-ranging assessment of ABI-H0731 in non-cirrhotic, CHB patients.
The purpose of this study is to assess the long-term protection against HBV infection in adult subjects, aged 18-40 years vaccinated with three or four doses of Engerix-B 20 to 30 years ago
Chronic hepatitis B (CHB) is a serious liver disease worldwide，HBV MTCT is the important reason to keep high prevalence of chronic HBV infection in China. Intrapartum infection is the main period of neonatal HBV infection. Injecting HBIG and hepatitis b vaccine immediately after birth is the most important method of blocking mother-to-child transmission of HBV. However, regular doses of HBIG combined with hepatitis b vaccine blocking measures still have a failure rate as high as 5% ~ 15%.There are numerous studies to explore pregnancy women with HBV positive, especially high viral load of those women during pregnancy being treated with nucleoside analogs to increase the blocking rate of HBV MTCT, but there is still a failure rate of 2.2% to 18%. In this study, we will explore the efficiency of personalized blocking method of HBV maternal-neonatal transmission in high-risk newborns,according to the venous blood HBsAg state of neonatus at birth.
This trial will study the effect of a polyherbal capsule in lowering the viral load of patients with chronic Hepatitis B infection and record the incidence of from Hepatitis B surface antigen elimination in 12 months
Background Hepatitis B virus (HBV) co-infection in individuals with hepatitis C virus (HCV) can enhance the severity of hepatitis and the risks of liver cirrhosis and hepatocellular carcinoma (HCC). Hepatitis B vaccine is an effective measure to prevent HBV infection. Whether patients with HCV infection have non-protective antibody responses to hepatitis B vaccination more frequently than healthy subjects is still controversial and studies about cytokine response have been seldom reported. Methods Not-in-treatment patients with chronic HCV infection and 1:2 community/gender matched healthy control were obtained from a community-based screening. All participants received three doses of hepatitis B vaccine (20 μg HBsAg/ml/dose) on 0, 1 and 6 months schedule. Anti-HBs was tested 1 month after the third dose of vaccination and was compared between two groups. Spot-forming cells (SFCs) of interferon-γ (IFN-γ), interleukin-2 (IL-2), interleukin-4 (IL-4), interleukin-5 (IL-5) and interleukin-6 (IL-6) produced by lymphocyte were tested by enzyme-linked immunospot (ELISPOT) and were compared between two groups.
This study evaluates whether addition of Peginterferon alfa-2a to CHB Patients Treated with nucleoside analogues (NAs) can enhance the rate of HBsAg clearance at end of treatment. This study is a Randomized, open-label, multi-center study. The CHB patients with NAs treatment and have achieved HBV DNA <15 IU/ml、HBeAg <100 PEIU/ml、HBsAg positive and HBsAg<1500 IU/ml will be randomized into 2 groups: Group 1 (Combination group): Maintain NAs treatment while add 48-week standard treatment by Peginterferon alfa 2a 180µg/week Group 2 (Mono NA group) : Maintain NAs treatment for 49 weeks. Note: NAs including: LAM, ADV, ETV, or TDF.