Active clinical trials for "Hepatitis B"

This study is to investigate investigate the safety and efficacy of Double plasma molecular adsorption system with sequential low-dose plasma exchange in treating hepatitis B virus-related acute-on-chronic liver failure.

This is a retrospective-prospective longitudinal cohort study, with analyses performed before and after introduction of the pathway, and comparisons made to unexposed controls. We will launch a protocol-driven management for CHB patients, and provide the appropriate assessment tools (transient elastography, HBV DNA assay) to general outpatient clinics (GOPC) in Hong Kong. Patients who fulfil treatment criteria will be referred to specialist outpatient clinics (SOPC) in a fast-track manner. We will also evaluate the linkage-to-care rate 3 years before the launch of this care pathway retrospectively.

Chronic hepatitis B virus (HBV) infection remains a global public health burden around the world. Investigating the disease process of chronic hepatitis B (CHB) is essential to individual management in clinical practice. According to American Association for the Study of Liver Diseases (AASLD) 2018 Hepatitis B Guidance, CHB can be classified into four phases: immune-tolerant CHB, HBeAg-positive immune active CHB, inactive CHB and hepatitis B e antigen (HBeAg)-negative immune active CHB. Antiviral therapy is recommended in patients with HBeAg-positive or -negative immune active CHB patients to reduce the incidence of liver cirrhosis and hepatocellular carcinoma, while periodic monitoring is recommended for inactive carrier and immune-tolerant CHB patients. However, a substantial proportion of patients fall into an indeterminate phase whose serum HBV DNA and alanine aminotransferase levels do not fit well into these well-described phases. Most of CHB patients with indeterminate phase are HBeAg negative. However, the clinical outcomes of these patients remain unclear. Therefore, the purpose of this study is to investigate the clinical outcomes of HBeAg-negative chronic hepatitis B patients with indeterminate phase.

Hepatitis B virus (HBV) infection is a major public health problem facing the world, with more than 2 billion people infected with HBV. There are more than 400 million chronic carriers, and 75% of carriers live in the Asia Pacific region. The mother-to-child transmission route of hepatitis B virus is recognized as one of the most important routes of transmission, and recent studies have found that fathers who are carriers of HBV may also be one of the risk factors for HBV infection in children, but as far as the investigators know. Therefore, as a high-population area in China, the purpose of this study is to investigate the prevalence of HBV infection in this population.

China is a highly prevalent area of hepatitis B virus（HBV） infection, with at least 75 million hepatitis B virus carriers, and 80% of primary hepatocellular carcinoma (HCC) is associated with chronic hepatitis B virus infection. Liver transplantation is currently the preferred method for end-stage liver disease such as biliary atresia and cirrhosis in children. In recent years, children's liver transplantation has developed rapidly and the number of developments has increased significantly. If there is chronic hepatitis B virus infection in the donor liver, it may cause HBV transmission, or the patient may have a low-load occult hepatitis B virus infection, and after immunosuppressive treatment, it may lead to hepatitis B virus infection after surgery.

HBV-related acute-on-chronic liver failure (ACLF) is a clinical syndrome defined as acute hepatic insult with diagnosed or undiagnosed chronic liver disease. Current clinical guidelines advocate oral antiviral treatment in HBV-related ACLF. However, no conclusion on which nucleoside analogue is the most satisfactory drug for the treatment of HBV-related liver failure has not been reached yet. In this cohort study, the investigators will compare the efficacy, safety, and tolerability of tenofovir alafenamide (TAF), Tenofovir Disoproxil Fumarate (TDF) and entecavir (ETV) in HBV-related ACLF in China. In addition, the drug metabolism characteristics of TAF will be explored in such severe liver injury population of HBV-ACLF.

Worldwide, hepatitis B virus (HBV) infection is a major cause of acute hepatitis, and chronic infection with HBV often leads to chronic hepatitis, liver cirrhosis, and hepatocellular carcinoma. So far, the most effective way to prevent HBV infection in susceptible population is to inject hepatitis B vaccine. However, long-term protection against hepatitis B virus (HBV) after vaccination remains widely debated. This study aims to carry out a comprehensive study to evaluate the efficacy of hepatitis B vaccine booster from the aspect of humoral and cellular immunity in neonatally vaccinated children in Chongqing.

Most new hepatitis B virus (HBV) infections are acquired perinatally. In this study, pregnant women with HBsAg and HBeAg will receive tenofovir disoproxil fumarate during the last trimester of pregnancy and for two months following delivery. Their infants will receive hepatitis B (HB) immunization, starting with a first dose soon after birth. We hypothesize that the risk of mother-to-child transmission of HBV will be lower than 2%. The results of the study will help define policy to manage HBV infected pregnant women to prevent perinatal transmission.

At present, whether the hepatitis B vaccine (HBV) can be vaccinated on time after neonatal surgery has become a common problem for children's families, neonatal surgeons, and vaccination departments, but there are few relevant studies at home and abroad, and there is no corresponding guide or consensus. In the early stage, our research team investigated the vaccination plans of the vaccination units in the main urban areas of Chongqing for such children through telephone follow-up, and found that the practices of each unit were different, all based on their own experience, and there was no clear evidence to support the vaccination or should not be vaccinated, which may cause some children to miss the best vaccination time or increase the risk of vaccination. The center is a relatively large neonatal surgery center in southwest China. The diagnosis and treatment of neonatal digestive tract malformations is at the leading level in China. It can carry out various neonatal operations such as neonatal necrotizing enterocolitis, congenital anorectal malformations, and congenital megacolon. On average, it carries out more than 30 third and fourth grade neonatal gastrointestinal operations every month. It has accumulated a lot of experience in the follow-up of newborns, There is a large amount of clinical data support for children who need to be vaccinated after surgery, so it is planned to follow up the second and third doses of hepatitis B vaccine and whether there are adverse reactions related to vaccination for children who need to be vaccinated after gastrointestinal surgery in the neonatal period, and at the same time check the production of HBsAb after vaccination, The immune response and adverse reactions of hepatitis B vaccine at different time points after surgery were studied to increase clinical evidence for the determination of hepatitis B vaccine vaccination program for newborns after surgery.

Portal hypertension (PH) is one of the key drivers of clinical deteoration in patients with liver cirrhosis. It has been demonstrated that antiviral therapy in patients with chronic hepatitis C infection leads to a decrease of PH and is associated with an improved outcome. Recently, Bulevirtide was approved for the treatment of patients coinfected with hepatitis B (HBV) and chronic hepatitis delta (HDV) infection, which helps to achieve viral supression in these patients. This study investigates the potential effects of viral supression on PH in patients with chronic HBV/HDV infection and liver cirrhosis.