Skip to Main content Skip to Navigation
Journal articles

Evidence for long-term association of virion-delivered HBV core protein with cccDNA independently of viral protein production

Abstract : Background & Aims: HBV persists in the nucleus of infected hepatocytes as a covalently closed circular DNA (cccDNA) episome that constitutes the template for viral RNA and protein synthesis. Both HBx and HBc (core) viral proteins associate with cccDNA but, while HBx is required for viral transcription, the role of HBc is still unclear. The aim of this study was to determine if HBc derived from incoming nucleocapsid can associate with cccDNA before the onset of viral transcription and protein production. Methods: Chromatin immunoprecipitation assays were performed in native conditions. In addition, differentiated HepaRG (dHepaRG) cells infected with HBx-deficient HBV were used to investigate if HBc delivered by incoming virions can associate with cccDNA. Results: Our results indicate that HBc can associate with cccDNA in the absence of viral transcription and de novo protein synthesis. In dHepaRG cells, this association is stable for at least 6 weeks. Conclusion: These results suggest that virion-delivered HBc may participate at an early stage of cccDNA formation and/or transcription. Lay summary: The hepatitis B virus genome is released into the nucleoplasm of infected cells after disassembly of the viral nucleocapsids at the nuclear membrane. Herein, we show for the first time that virion-delivered hepatitis B core protein, a component of the viral capsid, can stably associate with integrated viral DNA.
Document type :
Journal articles
Complete list of metadata

https://hal.archives-ouvertes.fr/hal-03319312
Contributor : Julie Lucifora Connect in order to contact the contributor
Submitted on : Thursday, August 12, 2021 - 10:23:25 AM
Last modification on : Friday, August 13, 2021 - 3:19:40 AM

File

PIIS2589555921001063.pdf
Publisher files allowed on an open archive

Identifiers

Collections

Citation

Julie Lucifora, Florentin Pastor, Émilie Charles, Caroline Pons, Héloïse Auclair, et al.. Evidence for long-term association of virion-delivered HBV core protein with cccDNA independently of viral protein production. JHEP Reports Innovation in Hepatology, Elsevier, 2021, 3 (5), pp.100330. ⟨10.1016/j.jhepr.2021.100330⟩. ⟨hal-03319312⟩

Share

Metrics

Record views

51

Files downloads

22