Search results for "cccDNA"

showing 3 items of 3 documents

Update of the statements on biology and clinical impact of occult hepatitis B virus infection

2019

In October 2018 a large number of international experts with complementary expertise came together in Taormina to participate in a workshop on occult hepatitis B virus infection (OBI). The objectives of the workshop were to review the existing knowledge on OBI, to identify issues that require further investigation, to highlight both existing controversies and newly emerging perspectives, and ultimately to update the statements previously agreed in 2008. This paper represents the output from the workshop.

0301 basic medicineOccult HBV infectionHepatitis B virusmedicine.medical_specialtyCarcinoma HepatocellularHepatocellular carcinomaHbv reactivationMEDLINEHBV reactivationOBImedicine.disease_cause03 medical and health sciences0302 clinical medicineHBV S variantRisk FactorsmedicineHumansHepatitis B AntibodiesIntensive care medicineComputingMilieux_MISCELLANEOUSHepatitis B virusHepatitis B Surface AntigensHepatologyHBV cccDNALiver Neoplasmsvirus diseasesHBV cccDNA; HBV reactivation; HBV S variants; HBV transmission; Hepatocellular carcinoma; OBI; Occult HBV infectionHBV S variantsHepatitis Bmedicine.diseaseOccultdigestive system diseases3. Good healthHBV S variants; HBV cccDNA; HBV reactivation; HBV transmission; Hepatocellular carcinoma; OBI; Occult HBV infection030104 developmental biologyLiverHepatocellular carcinomaDNA Viral030211 gastroenterology & hepatologyHBV transmission[SDV.MHEP]Life Sciences [q-bio]/Human health and pathology
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2020

ObjectiveThe HBV HBx regulatory protein is required for transcription from the covalently closed circular DNA (cccDNA) minichromosome and affects the epigenetic control of both viral and host cellular chromatin.DesignWe explored, in relevant cellular models of HBV replication, the functional consequences of HBx interaction with DLEU2, a long non-coding RNA (lncRNA) expressed in the liver and increased in human hepatocellular carcinoma (HCC), in the regulation of host target genes and the HBV cccDNA.ResultsWe show that HBx binds the promoter region, enhances the transcription and induces the accumulation of DLEU2 in infected hepatocytes. We found that nuclear DLEU2 directly binds HBx and the…

0303 health sciencesvirusesEZH2GastroenterologyRepressorPromotermacromolecular substancescccDNABiologydigestive system diseases3. Good healthChromatinCell biology03 medical and health sciencesHBx0302 clinical medicineTranscription (biology)030220 oncology & carcinogenesisHistone methyltransferase030304 developmental biologyGut
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Hepatitis B virus maintains its pro-oncogenic properties in the case of occult HBV infection.

2003

Background & Aims: Occult hepatitis B virus (HBV) infection is characterized by persistence of HBV DNA into the tissue of hepatitis B surface antigen-negative individuals. The clinical relevance of this peculiar infection is still under debate. In particular, the impact of occult HBV infection in cases of hepatocellular carcinoma (HCC) is uncertain. We investigated the prevalence and molecular status of occult HBV in patients with HCC. Methods: We tested tumor tissues from 107 patients with HCC and the corresponding nontumor liver tissue from 72 of these patients for HBV DNA. We also examined liver specimens from 192 patients with chronic hepatitis. All cases were hepatitis B surface antige…

MaleHBV; HCC; occultHepatitis B virusCarcinoma HepatocellularOCCULT HEPATITIS B VIRUS INFECTION; HEPATOCELLULAR CARCINOMA; HBV DNA; TUNOR AND NONTUMOR LIVER TISSUES; HBV TRANSCRIPTS; HBV COVALENTLY CLOSED CIRCULAR DNA; INTEGRATED AND EPISOMAL HBV DNATranscription GeneticOCCULT HEPATITIS B VIRUS INFECTIONHBV TRANSCRIPTSGenome ViralBiologyVirus Replicationmedicine.disease_causeChronic liver diseaseHepatitis B ChronicmedicineCarcinomaHBVHumansHEPATOCELLULAR CARCINOMATUNOR AND NONTUMOR LIVER TISSUESHCCAgedHepatitis B virusHepatologyINTEGRATED AND EPISOMAL HBV DNALiver NeoplasmsGastroenterologyvirus diseasescccDNAMiddle AgedHepatitis Bmedicine.diseaseOccultVirologydigestive system diseaseshepatitis B surface antigenLiverViral replicationHBV DNAoccultHepatocellular carcinomaDNA ViralImmunologyFemaleHBV COVALENTLY CLOSED CIRCULAR DNAInfection OBI
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