Active clinical trials for "Hepatitis B"

This observational long-term follow-up study will evaluate demographic, clinical, histological, biochemical, and virological parameters of patients with chronic hepatitis B and low viremia who do not require antiviral therapy according to current guidelines. Liver stiffness values as detected by FibroScan and ARFI will also be collected if available. All data will be collected at yearly intervals (minimum). Patients included in the study are followed for up to 10 years. The target sample size is <1000.

The study was conducted to observe the clinical features during pregnancy in women with chronic hepatitis B virus infection and mother-to-child transmission of hepatitis B virus.

Treatment of multidrug resistant (MDR) chronic hepatitis B (CHB) is still a challenging issue. Hence, the investigators will perform a multicenter prospective cohort study for the evaluation of tenofovir disoproxil fumarate (TDF)-based therapy for MDR CHB at real life settings.

HITACH developed a new combi-elastography imaging technology combines shear wave imaging and strain imaging technology. In the study, not only the F index which is related to the stage of liver fibrosis can be obtained, but also the A index which is related to the stage of hepatitis can be obtained, which can not be obtained by other ultrasound devices.

The project aims to retrieve patients diagnosed with chronic hepatitis B (cHB) and hepatitis C (cHC) who are lost to follow-up.Data files of the Public Health System and microbiology laboratories will be explored for registered cases of cHB and cHC. Subsequently the investigators will compare the registered cases with the list of known cHB and cHC patients in hospital care. Patients lost to follow up will be informed and approached via either the Public Health Service (PHS) or their primary care physician. Identified patients will be invited for re-evaluation at the regional hepatitis centre (The North Western Hospital, formerly Medical Centre Alkmaar) to assess the current status of their chronic disease. Evaluation will be performed in accordance with (inter-)national guidelines, no extra interventions will be performed. After completion of re-evaluation, a final report will be made and send to both patient and primary care physician with recommendations for further follow-up.

Chronic hepatitis B (CHB) is a serious liver disease worldwide, and the leading cause of cirrhosis and hepatocellular carcinoma (HCC). HBsAg loss/seroconversion is considered to be the ideal endpoint of antiviral therapy in both HBeAg-positive and -negative patients, and the ultimate treatment goal in CHB, However HBsAg loss occurred rarely by interferon treatment. Although It was reported that in nature history HBsAg level≤100 IU/ml can bring good long term outcomes in patients with chronic hepatitis B. it was not clear whether patients who achieved HBsAg level≤100 IU/ml by interferon treatment could maintain sustained viral response and the state of HBsAg level≤100 IU/ml.

Previous studies dealt with patients who maintained antiviral drugs for 2 ~ 6 months after final chemotherapy and they revealed that many of the patients who stopped preemptive antiviral drug within 6 months experienced viral reactivation. Based on the study results, guidelines recommend that preemptive antiviral therapy should be maintained for at least 6 months. Nevertheless, many clinicians apply the preemptive antiviral drugs for 1~2 years or longer after final chemotherapy without definite evidences, and this practice increases the medical expenditure a lot. Therefore, the investigators are going to find out the proper and safe duration of preemptive antiviral therapy which can be a good reference in the future practice.

Patients with chronic Hepatitis B who are under oral antiviral treatment for at least 6 months at study start will be monitored once yearly for kidney function changes within their routine outpatient visit. Therefore urine samples will be collected and some additional blood test will be done within the routine blood sampling.

This is a multi-center cross-sectional study in which the Real-time Tissue Elastography® measurements will be collected prospectively from patients with chronic hepatitis B or C virus presenting for liver biopsy.

The aim of this study is to investigate the off-treatment sustained virological and biochemical response in chronic hepatitis B patients following the guideline by the Asian Pacific Association for the Study of the Liver (APASL) in Korea.