Active clinical trials for "Hepatitis B"

The purpose of this study is to evaluate the efficacy a Screening, Brief Intervention, and Referral to Treatment (SBIRT) program for linking opioid dependent individuals currently incarcerated or in probation in Moldova, Kyrgyzstan, and Ukraine to opioid substitution therapy in the community after release or during their probation period.

The PRINCESSE study will implement a comprehensive package of services in sexual and reproductive health for female sex workers in the region of San Pedro in Cote d'Ivoire, including screening, prevention and treatment for HIV, viral hepatitis B, sexually transmitted infections and family planning. All services will be available in mobiles clinics operating on prostitution sites and organized for a chronic follow-up of participants.

The study is being conducted to evaluate the safety, tolerability, pharmacokinetics and pharmacodynamics of HRS-5635 in healthy adults and chronic hepatitis B. To explore the reasonable dosage of HRS-5635.

Natural Killer (NK) cells play a large role in the innate immune response as they are equipped to kill infected or tumor cells. They express a panel of activating and inhibitory receptors that regulate the destruction of the target cell. Many reports have shown that NK cell function is suppressed in CHB patients. Exhaustion occurs when activating receptors become over stimulated leading to the loss of NK function. The investigators hypothesize that NK cells are rendered dysfunctional/ exhausted by HBV. The primary objective is to determined the phenotypical modifications and mechanisms associated to NK cell dysfunction, during different phases of CHB infection, in not treated patients.

Multicenter, Prospective Open-label Single Arm Trial Chronic hepatitis B male and female adults on antiviral treatment for hepatitis B, without cirrhosis who are currently HBV DNA (-) and HBeAg (-) To evaluate the safety and efficacy of stopping long-term antiviral therapy in chronic hepatitis B patients without cirrhosis who are currently HBV DNA (-) and HBeAg (-)

Antibodies are the primary mediators of the protection against infection provided by vaccination. Antibodies become most powerful after the B cells that produce them undergo an evolutionary process called affinity maturation, in which antibodies increase their ability to bind to their targets, and thus neutralize pathogens. Affinity maturation occurs in structures within secondary lymphoid organs (for example lymph nodes or tonsils) known as germinal centers. Germinal centers are well known to be triggered by the first dose of vaccines, generating affinity matured plasma cells (B cells that secrete antibody into serum) and memory B cells, which can be converted into plasma cells by booster doses of vaccine. However, it is not fully understood the extent to which memory B cells can return to germinal centers again upon vaccine boosting. Such return would be very important to allow B cells, for example, to adapt to emerging variants of viruses such as influenza or SARS-CoV-2. This study will involve acquiring samples of B cells from germinal centers that form in response to vaccination with the highly effective hepatitis B vaccine. These cells will be analyzed to determine what fraction of them are memory B cells that returned to germinal centers upon boosting, information that is key to knowledge of how vaccine boosters work. Understanding the "rules" that govern how and when memory B cells choose to return to germinal centers in an effective vaccine such hepatitis B could help efforts to develop effective vaccination against more challenging, rapidly mutating viruses, such as influenza, HIV, and hepatitis C.

This is a long-term follow-up study to assess durability of efficacy, as measured by SVR, in participants who have received prior treatment with GSK3228836 and achieved a complete or partial response. No further treatment with GSK3228836 will be administered in this study.

A prospective interventional study to evaluate a strategy of point-of-care testing for sexually transmitted infections including chlamydia, gonorrhoea, trichomoniasis, syphilis, and Hepatitis B with comprehensive case management including partner notification in antenatal settings in Harare province, Zimbabwe.

This study is a randomised, controlled, unblinded, clinical intervention trial consisting of 12 weeks of aerobic exercise training. Thirty persons with chronic hepatitis B (CHB) and hepatic steatosis are randomised to either aerobic exercise training (intervention group, n=15) or no intervention (control group, n=15). The study will investigate the effects of the exercise intervention on the liver and the hypothesis is that the exercise group will reduce the fat-fraction of the liver after the intervention.

The primary objective of this study is to compare the efficacy, safety, and tolerability of tenofovir alafenamide (TAF) versus tenofovir disoproxil fumarate (TDF) in treatment-naive and treatment-experienced adults with hepatitis B e antigen (HBeAg)-negative chronic hepatitis B virus (HBV) infection in China.