TECHNIQUES Cell Culture Systems of HCV Using JFH-1 and Other Strains

Hepatitis C virus (HCV) infection is seen worldwide and is a significant cause of severe chronic liver diseases. Recently, a large number of direct-acting antivirals (DAAs) have been developed against HCV infection, resulting in significant improvements in treatment efficacy. Rapid progress in HCV research has been largely dependent on the development of HCV culture systems and small animal infection models. In the development of HCV cell culture systems, the discovery of the JFH-1 clone, an HCV strain isolated from a fulminant hepatitis C patient, was a key finding. The JFH-1 strain was the first infectious HCV strain belonging to genotype 2a. JFH-1 replicated efficiently in cultured cell lines without acquiring adaptive mutations, providing the secretion of infectious viral particles into the culture medium. Recently, other HCV strains also were reported to be infectious in cultured cells with adaptive viral mutations, but genotype-1b infectious HCV clones and virus culture systems for clinical isolates are still missing. These infectious HCV systems have provided powerful tools to study the viral life cycle, to construct antiviral strategies, and to develop effective vaccines.
Source: Cold Spring Harbor perspectives in medicine - Category: Research Authors: Tags: Hepatitis C Viruses: The Story of a Scientific and Therapeutic Revolution TECHNIQUES Source Type: research

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In this report, we present the case of a patient who was diagnosed with primary biliary cholangitis and metabolic syndrome. Initial evaluation also revealed diabetes with elevated fasting plasma glucose and glycated hemoglobin. After eight weeks of treatment with ursodeoxycholic acid, a complete normalization of the hepatic biological tests was observed. A few months later, while body weight and abdominal perimeter remained stable, fasting blood glucose and glycated hemoglobin decreased significantly, compatible with diabetes disappearance. This finding supports the concept that the inflamed liver plays a major role in the...
Source: Acta Gastro-Enterologica Belgica - Category: Gastroenterology Tags: Acta Gastroenterol Belg Source Type: research
Conclusion: LC can be safely performed in cirrhotic patients. However, higher CTP and MELD scores, operative bleeding, more blood and plasma transfusion units, longer operative time, lower platelet count, and higher INR values are predictors of poor outcome that can be improved by proper patient selection and meticulous peri-operative care and by using Harmonic scalpel shears.
Source: Annals of Medicine and Surgery - Category: General Medicine Source Type: research
Goals and Background: International guidelines recommend prioritized treatment initiation in hepatitis C virus (HCV)-infected patients with advanced liver disease. We aimed to evaluate whether the widespread usage of direct acting antivirals (DAAs) has led to a decrease in late presentation for care. Study: Data derived from the multicenter German Hepatitis C Cohort (GECCO) was analyzed. Treatment naive HCV-infected patients initiating DAA-based treatment between January 2014 and September 2017 were included. Advanced liver disease was defined by aspartate aminotransferase to platelet ratio index score ≥1.5, METAVI...
Source: Journal of Clinical Gastroenterology - Category: Gastroenterology Tags: LIVER, PANCREAS & BILIARY TRACT: Original Articles Source Type: research
CONCLUSIONS: HCV genotype 3, specifically subtype 3b, is associated with more rapid progression of liver disease. Further analysis to compare HCV subtype 3a and 3b is needed in high prevalence regions. TRIAL REGISTRATION: NCT01293279,; NCT01594554, PMID: 31934936 [PubMed - as supplied by publisher]
Source: Chinese Medical Journal - Category: General Medicine Authors: Tags: Chin Med J (Engl) Source Type: research
k A Abstract BACKGROUND: There is ongoing search for new noninvasive biomarkers to improve management of patients with hepatocellular carcinoma (HCC). Studies, mostly from the Asian-Pacific region, demonstrated differential expression of liver-specific microRNA-122 (miR-122) in tissue as well as in sera of patients with hepatitis B virus- and hepatitis C virus-induced HCC. AIM: To evaluate prognostic value of miR-122 in patients with HCC in a European population and determine potential factors related to alteration of miR-122 in sera. METHODS: Patients with confirmed HCC (n = 91) were included in the stu...
Source: World Journal of Gastroenterology : WJG - Category: Gastroenterology Authors: Tags: World J Gastroenterol Source Type: research
Liver disease as a result of chronic hepatitis C virus (HCV) infection is a global problem. While some HCV infections resolve spontaneously, viral persistence associates with compromised T cell immunity. In this issue of the JCI, Chen et al. and Coss et al. explored virus-specific CD4+ T cell response during HCV infection. Both studies evaluated the HCV-specific T cells of patients with different courses of infection. Chen et al. revealed that initial CD4+ T cell responses are similar during early infection and that T cell failure resulted from loss of the virus-specific T cells themselves. Coss et al. showed that HCV-spec...
Source: Journal of Clinical Investigation - Category: Biomedical Science Authors: Source Type: research
ConclusionsHB-PAP maintained physical performance and improved aerobic fitness according to 6MWT but not CPET, supporting the use of personal activity trackers to monitor/guide home-based prehabilitation programs in cirrhosis.
Source: Digestive Diseases and Sciences - Category: Gastroenterology Source Type: research
Abstract Hepatitis C virus (HCV) is a major cause of end-stage liver diseases. Direct-acting antivirals (DAAs), including inhibitors of nonstructural proteins (NS3/4A protease, NS5A, and NS5B polymerase), represent key components of anti-HCV treatment. However, some DAAs are associated with increased drug resistance and undesired side effects. Previous reports have shown that bisamides could be a novel class of cyclophilin A (CypA) inhibitors for treating HCV as a member of combinational therapies. To fully elucidate structure-activity relationships of bisamide derivatives and find a better hit compound with diver...
Source: European Journal of Medicinal Chemistry - Category: Chemistry Authors: Tags: Eur J Med Chem Source Type: research
This study aimed to detect etiologies and histopathological features of non-alcoholic fatty liver disease (NAFLD) in Egyptian children
Source: European Journal of Pediatrics - Category: Pediatrics Source Type: research
Hepatitis C virus (HCV) represents an important and growing public health problem, chronically infecting an estimated 70 million people worldwide. This blood-borne pathogen is generating a new wave of infections in the United States, associated with increasing intravenous drug use over the last decade. In most cases, HCV establishes a chronic infection, sometimes causing cirrhosis, end-stage liver disease, and hepatocellular carcinoma. Although a curative therapy exists, it is extremely expensive and provides no barrier to reinfection; therefore, a vaccine is urgently needed. The virion is asymmetric and heterogeneous with...
Source: Cold Spring Harbor perspectives in medicine - Category: Research Authors: Tags: Hepatitis C Viruses: The Story of a Scientific and Therapeutic Revolution PERSPECTIVES Source Type: research
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