Hepatitis B ; genetics ; virology ; Hepatitis B virus ; genetics

OBJECTIVETo investigate the distribution of Hepatitis B virus genotypes and subgenotypes among patients with chronic hepatitis B in Xinjiang Uighur.

METHODSThe HBV genotypes and subgenotypes were analyzed by PCR-restriction fragment length polymorphism in 109 patients with chronic hepatitis B.

RESULTSTwo HBV genotypes, genotype C (45.9%) and genotype C/D (29.4%) were prevalent, genotype B (8.3%) and genotype D (16.5%) were also found in Xinjiang Uighur. Genotype C had two subgenotypes, C1 (54%) and C2 (46%). Genotype B had only one subgenotype, i.e. Ba. The subgenotype C2 was associated with cirrhosis and hepatocellular carcinoma.

CONCLUSIONIn Uygurs, the most common HBV genotypes were C and C/D, and the subgenotype C2 was associated with cirrhosis and hepatocellular carcinoma.

Carcinoma, Hepatocellular ; virology ; Genotype ; Hepatitis B virus ; genetics ; Hepatitis B, Chronic ; virology ; Humans ; Liver Neoplasms ; virology

Animals ; Genotype ; Hepatitis E ; veterinary ; virology ; Hepatitis E virus ; genetics ; Hepatitis, Viral, Animal ; virology ; Prevalence

Genes, Viral ; genetics ; Hepacivirus ; genetics ; Hepatitis C ; virology ; Recombination, Genetic

Genetic Heterogeneity ; Hepacivirus ; genetics ; Hepatitis C ; virology ; Humans ; Replicon ; genetics

Cloning, Molecular ; DNA, Viral ; genetics ; Genome, Viral ; genetics ; Hepatitis B ; virology ; Hepatitis B virus ; genetics ; Humans

This article describes the nomenclature, history and genetic evolution of duck hepatitis A virus, and updates the epidemiology, clinical symptom and surveillances of duck virus hepatitis A. It also summarizes the present status and progress of duck virus hepatitis A and illustrated the necessity and urgency of its research, which provides rationale for the control of duck hepatitis A virus disease in China.
Animals ; Ducks ; virology ; Hepatitis Virus, Duck ; classification ; genetics ; isolation & purification ; Hepatitis, Viral, Animal ; virology ; Picornaviridae Infections ; veterinary ; virology

OBJECTIVETo study hepatitis B virus (HBV) genotype and subtype distribution and its clinical significance in HBV-infected patients.

METHODSWe used type/subtype-specific primers and PCR to detect HBV genotype and subtype of 445 HBV-infected patients from Beijing, Changchun, Hanchuan Shenzhen, Qingyuan and Nanjing, including 7 acute hepatitis (AH), 36 asymptomatic HBV carriers (ASC), 352 chronic hepatitis (CH), 28 liver cirrhosis (LC), and 22 hepatocellular carcinoma (HCC) cases. Genotyping results were confirmed by PCR product sequencing.

RESULTSAmong 445 HBV-infected patients, the proportions of genotype B, C, and B/C were 32.6% (145/445), 53.7% (239/445), and 13.7% (61/445), respectively. In genotype C, 13 (5.4%) were subtype C1, 135 (56.5%) were subtype C2, and the remaining 91 (38.1%) were neither C1 nor C2. In genotype B, 100 (69.0%) were subtype Ba, 25 (17.2%) subtype Bj, and the other 20 (13.8%) were neither Ba nor Bj. In genotype B/C, 15 (24.6%) were Ba/C2, 8 (13.1%) Bj/C2, 6 (9.8%) Ba/C1, 3 (4.9%) Bj/C1, 11 (18.0%) Ba/neither C1 nor C2, 7 (11.5%) Bj/neither C1 nor C2, and 6 (9.8%) neither Ba nor Bj/neither C1 nor C2, 2 (3.3%) neither Ba nor Bj/C1, 3 (4.9%) neither Ba nor Bj/C2. The HBV genotype and subtype distribution we found exhibited significant differences in the various clinical types of HBV infection tested, and showed that genotype C was predominant among patients with liver cirrhosis (78.6%) and hepatocellular carcinoma (86.4%) while genotype B was predominant in asymptomatic carriers (72.2%). In addition, genotype and subtype distribution showed no significant differences between male and female patients, but genotype and subtype distribution showed significant differences in patients positive or negative with HBeAg.

CONCLUSIONSubtypes Ba and C2 are predominant in patients with hepatitis B from these 6 cities, and genotype C may be associated with the development of liver cirrhosis and hepatocellular carcinoma.

Genotype ; Hepatitis B virus ; genetics ; Hepatitis B, Chronic ; virology ; Humans ; Liver Cirrhosis ; virology ; Liver Neoplasms ; virology ; Polymerase Chain Reaction

BACKGROUND/AIMS: The genotype of hepatitis B virus (HBV) has been suggested to correlate with the clinical outcome of HBV infection. We analyzed the distribution of HBV genotypes according to the clinical outcomes of HBV infection in Jeju island. METHODS: A total of 145 HBsAg-positive samples were enrolled. To identify specific patterns of HBV genotypes, we performed restriction fragment length polymorphism (RFLP). In the case that typical restriction pattern of RFLP was not determined, phylogenetic analysis was performed. RESULTS: RFLP analysis was possible in 65 patients. Clinical diagnoses of the 65 patients with chronic liver disease were as follows: HBeAg-positive healthy carrier (HBeAg+, anti-HBe, HBV DNA+, transaminase normal; n=20); Inactive HBsAg carrier (n=12); chronic hepatitis B (n=14); liver cirrhosis (n=9); hepatocellular carcinoma (n=10). Sixty-two patients showed a typical restriction pattern by HinfI. However, 3 patients showed a unique restriction pattern by HinfI, which were not reported in the literature. When phylogenetic analysis was performed to classify the genotype of these 3 patients, they were also genotype C. However, all 65 patients showed typical restriction patterns by Tsp509I, which were reported in genotype C. CONCLUSIONS: All chronic HBV infections are genotype C in Jeju island regardless of clinical outcomes.
Carcinoma, Hepatocellular/virology ; Carrier State/virology ; Genotype ; Hepatitis B virus/*genetics ; Hepatitis B, Chronic/complications/*virology ; Humans ; Liver Cirrhosis/virology ; Liver Neoplasms/virology ; Polymorphism, Restriction Fragment Length

OBJECTIVESTo study the phenomena of hepatitis B virus (HBV) integration into the tissues of hilar cholangiocarcinoma (HCCA) and to identify the integration sites in the host genome.

METHODSTen fresh HCCA samples were collected from the tissues by surgical ablation, 1 normal hilar bile duct sample selected as control. Cellular DNA were extracted by Wizard SV Genomic DNA Purification System. PCR-derived assay (HBV-Alu-PCR) was employed to amplify the viral-host junctions which contain the HBV sequence and the adjacent cellular flanking sequences. The PCR products were purified and subjected to sequencing by ABI-3730XL Auto DNA Analyzer. The sequence analysis of viral-host junctions was performed by DNASIS MAX 3.0 bioinformatics software. The insertion sites between viral and cellular sequences were identified through homology comparison using NCBI BLAST and MapViewer search.

RESULTSIn 10 HCCA samples, 5 were demonstrated to have HBV integration fragments with total 6 inserted sites identified. Sequence analysis from viral-host junction showed that HBV X gene inserted into host genome at random distribution with truncated fragments. HBV integration recurrently targeted the unknown region in upstream of CXXC finger protein-1 (CpG-binding protein) gene (4 cases). p53 tumor suppressor gene was also found at the integration site.

CONCLUSIONSThere is high integration rate of HBV DNA into cellular genome of HCCA. HBV integration is found frequently into or close to cancer-related genes. The findings demonstrate that HBV infection might have association with the pathogenesis of HCCA.

Aged ; Base Sequence ; Bile Duct Neoplasms ; genetics ; virology ; Cholangiocarcinoma ; genetics ; virology ; DNA, Viral ; genetics ; Female ; Hepatitis B ; virology ; Hepatitis B virus ; genetics ; isolation & purification ; Humans ; Male ; Virus Integration