View clinical trials related to Hepatitis B.
Filter by: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.
This study will assess both the antibody persistence of the investigational vaccine and the immune response and safety of a booster dose of PENTAXIM™ vaccine in 18 months-old toddlers who participated in an earlier study in order to determine if they are still protected before they receive a booster dose of D, T, IPV, pertussis or Hib vaccines and also to assess the quality of the induced immune memory in response to a booster dose of the same vaccine as in the primary series. Primary Objective: To describe the antibody persistence at 18 months of age and the booster effect of a dose of PENTAXIM™ on immunogenicity. Secondary objective: To describe the safety profile of the booster dose PENTAXIM™ in each vaccine group defined by the vaccines received during the primary series.
This study was designed to evaluate and compare the safety and tolerability of tenofovir disoproxil fumarate (TDF), emtricitabine (FTC)/TDF, and entecavir (ETV) in the treatment of hepatitis B patients with decompensated liver disease. Safety was assessed by evaluating adverse events (AEs) and laboratory abnormalities. Efficacy was assessed by evaluating reductions in Child-Pugh-Turcotte (CPT) and Model for End Stage Liver Disease (MELD) scores, reductions in hepatitis B virus (HBV) deoxyribonucleic acid (DNA), changes in liver enzymes, development of drug-resistant mutations, and generation of antibody to virus. A maximum randomized treatment duration of 168 weeks was planned. Since subjects with decompensated liver disease were enrolled into this study, it was necessary to provide early intervention strategies if profound viral suppression was not expeditiously achieved. For this reason, subjects with a decrease in plasma HBV DNA from baseline of < 2 log_10 copies/mL and plasma HBV DNA > 10,000 copies/mL (or plasma HBV DNA > 1,000 copies/mL for subjects who entered the study with HBV DNA < 10,000 copies/mL) at Week 8 had the option to start open-label FTC/TDF and continue in the study. Subjects with a virologic breakthrough or who had plasma HBV DNA levels remaining > 400 copies/mL (confirmed) at or after 24 weeks of treatment could have been unblinded at the investigator's discretion for selection of alternative anti-HBV therapy that may have included open-label FTC/TDF. If study drug was permanently discontinued, immediate initiation of another anti-HBV regimen was strongly recommended.
The immune response of uraemic patients to hepatitis B vaccination is impaired compared to healthy subjects. After vaccination, anti-HBs peak antibody concentrations are reduced. As the persistence of anti-HBs is closely related to the initial anti-HBs peak, a more immunogenic vaccine, allowing higher antibody concentrations, would be a benefit for this population.
To compare three formulations of Hib-MenAC vaccines mixed with Tritanrix™-HepB vaccine with that of Tritanrix™-HepB vaccine concomitantly administered with GSK Biologicals’ Hiberix™ vaccine and Tritanrix™-HepB vaccine mixed with Hiberix™ vaccine and concomitantly administered with Wyeth Lederle’s meningococcal C conjugate vaccine (Meningitec™), with respect to antibody response to vaccine antigens (meningococcal serogroups A and C and PRP) after a three-dose primary vaccination course.
Hepatitis B prevention in non-responders uraemic patients is currently based on both HBsAg surveillance and the isolation from HBsAg carriers. A more immunogenic vaccine would be a benefit for this population.
The pre-dialysis, peritoneal dialysis and haemodialysis patients would benefit from an improved hepatitis B vaccine, which will elicit stronger and faster cellular and humoral immune responses after the primary vaccination course.
The purpose of this study is to determine the optimal treatment duration of antiviral therapy for chronic hepatitis B.
The purpose of this study is to compare the immune response, safety and reactogenicity of Tritanrix™-HepB/Hib-MenAC vaccine given either with or without a birth dose of hepatitis B vaccine to Tritanrix™-HepB/Hiberix™ when given to healthy infants (born to mothers who do not carry hepatitis B virus) at 6, 10 & 14 weeks of age. This study will also include a small group of infants born to mothers who do carry hepatitis B virus; these infants will receive a birth dose of hepatitis B vaccine and will be vaccinated with Tritanrix™ HepB/Hib-MenAC at 6, 10 & 14 weeks age.
This study will assess immunogenicity, safety and reactogenicity of primary and booster vaccination.