ArticleMethods in molecular biology (Clifton, N.J.)2024
Detection of Hepatitis B Virus Covalently Closed Circular DNA and Intermediates in Its Formation.
Article in Methods in molecular biology (Clifton, N.J.), 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Hepatitis B virus (HBV) infection remains a global public health issue, and approximately 294 million individuals worldwide are chronically infected with HBV. Approved antivirals rarely cure chronic HBV infection due to their inability to eliminate the HBV covalently closed circular DNA (cccDNA), the viral episome, in the nucleus of infected hepatocytes. The persistence of cccDNA underlies the chronic nature of HBV infection and the frequent relapse after the cessation of antiviral treatment. However, drug development targeting cccDNA formation and maintenance is hindered by the lack of sufficient biological knowledge on cccDNA, and of its reliable detection due to its low abundance and the presence of high levels of HBV DNA species similar to cccDNA. Here, we describe a Southern blot method for reliably detecting the HBV cccDNA even in the presence of high levels of plasmid DNA and other HBV DNA species, based on the efficient removal of plasmid DNA and all DNA species with free 3' ends. This approach also allows the detection of certain potential intermediates during cccDNA formation.
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