نتایج جستجو برای: hbv genome cpg.
تعداد نتایج: 253638 فیلتر نتایج به سال:
background: the association between hepatitis b virus (hbv) mutations and hepatocarcinogenesis were reported in the literature. preference for g over c in the leading dna strand has been reported to account for the asymmetry in nucleotide (nt) composition. the aim of this study was to analyze the complete genome sequence and compositional asymmetry of hbv in different stages of hepatitis b. met...
objective: a recent field of research in epigenetics is dna methylation which involves the cpg island in the genome that subsequently controls transcription and translation of targeted genes. in the hepatitis b virus (hbv) genome, there are three cpg islands which tend to be methylated. the aim of the current study is to determine the methylation pattern of the hbv x gene in chronically infecte...
BACKGROUND CpG islands in hepatitis B virus (HBV) genome are potential targets for methylation mediated gene silencing, and may be involved in the pathogenesis of HBV infection. To date, their characteristics in HBV quasispecies (QS) remain largely unknown. The purpose of this study was to investigate the characteristics of CpG islands in HBV QS. METHODS Forty patients diagnosed as acute hepa...
Hepatitis B virus (HBV) is a hepatotropic virus causing hepatitis, cirrhosis and hepatocellular carcinoma (HCC). The methylation status of the HBV DNA in its different forms can potentially provide insight into the pathogenesis of HBV-related liver diseases, including HCC, however this is unclear. The goal of this study is to obtain comprehensive DNA methylation profiles of the three putative C...
BACKGROUND The association between hepatitis B virus (HBV) mutations and hepatocarcinogenesis were reported in the literature. Preference for G over C in the leading DNA strand has been reported to account for the asymmetry in nucleotide (nt) composition. The aim of this study was to analyze the complete genome sequence and compositional asymmetry of HBV in different stages of hepatitis B. ME...
DNA methylation is a type of epigenetic changes that directly affects DNA. In mammals, DNA methylation is essential for fetal development and stem cell differentiation and this phenomenon essentially occurs within the CpG islands. In this study, two methods were used to study the DNA methylation profile of cow genome. In the first method, the DNA methylation profile of the differentially expres...
DNA methylation is being increasingly recognized to play a role in regulation of hepatitis B virus (HBV) gene expression. The aim of this study was to compare the CpG island distribution among different HBV genotypes. We analyzed 176 full-length HBV genomic sequences obtained from the GenBank database, belonging to genotypes A through J, to identify the CpG islands in the HBV genomes. Our resul...
Hepatitis B virus (HBV) can integrate into the human genome, contributing to genomic instability and hepatocarcinogenesis. Here by conducting high-throughput viral integration detection and RNA sequencing, we identify 4,225 HBV integration events in tumour and adjacent non-tumour samples from 426 patients with HCC. We show that HBV is prone to integrate into rare fragile sites and functional ge...
The persistence of hepatitis B virus (HBV) infection is maintained by the nuclear viral covalently closed circular DNA (cccDNA), which serves as transcription template for viral mRNAs. Previous studies suggested that cccDNA contains methylation-prone CpG islands, and that the minichromosome structure of cccDNA is epigenetically regulated by DNA methylation. However, the regulatory effect of eac...
BACKGROUND Human immunodeficiency virus (HIV)-infected persons are hyporesponsive to hepatitis B virus (HBV) vaccination. CPG 7909 is an oligodeoxynucleotide containing immunostimulatory CpG motifs that activate human B and plasmacytoid dendritic cells via Toll-like receptor 9. We previously reported that addition of CPG 7909 to a commercial HBV vaccine enhanced the kinetics, magnitude, and lon...
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