DNA, Circular ; isolation & purification ; DNA, Viral ; isolation & purification ; Hepatitis B ; diagnosis ; Hepatitis B virus ; genetics ; Humans

China ; epidemiology ; Hepatitis B ; classification ; epidemiology ; virology ; Hepatitis B Surface Antigens ; blood ; Hepatitis B virus ; genetics ; isolation & purification ; Humans ; Mutation

Genes, Viral ; Genotype ; Hepatitis B virus ; genetics ; isolation & purification ; Hepatitis B, Chronic ; virology ; Humans ; Polymerase Chain Reaction ; methods

Adult ; China ; epidemiology ; Genes, Viral ; Genotype ; Hepatitis B ; epidemiology ; virology ; Hepatitis B virus ; classification ; genetics ; isolation & purification ; Humans ; Male

<b>OBJECTIVEb>To identify the intergenotype recombination of hepatitis B virus (HBV) in Chinese patients and explore new recombination types of HBV.

<b>METHODSb>Complete genome sequences of HBV from Chinese patients were downloaded from GenBank and analyzed by Fragment-typing method to screen the potential recombinants, and the breakpoints of recombination were identified by using Simplot program.

<b>RESULTSb>Thirty-one recombination types including 755 recombinants were identified from 1642 complete HBV genome sequences, including 22 B/C recombination types with 676 recombinants, 5 C/D recombination types with 75 recombinants, 3 A/C recombination types with 3 recombinants, and 1 C/I recombination type with 1 recombinant.

<b>CONCLUSIONb>Of the 31 recombination types comprising 755 recombinants, 4 are novel recombination types found for the first time. All these recombination types identified in this study involve genotype C.

Genome, Viral ; Genotype ; Hepatitis B virus ; genetics ; isolation & purification ; Humans ; Phylogeny ; Recombination, Genetic

<b>OBJECTIVEb>To investigate whether the hepatitis B virus (HBV) has quasispecies character by studying nucleotide sequence polymorphism and mutation features of HBV PreC/C gene region, and preliminaryly explore the heterogeneity of HBV quasispecies.

<b>METHODSb>The serum sample was obtained from a patient with chronic hepatitis B, and the whole HBV PreC/C gene region was amplified by PCR and cloned. Thirty-four clones that contained HBV PreC/C gene fragments were sequenced.

<b>RESULTSb>There were 28 kinds of different nucleotide sequences in 34 clones, and the nucleotide sequences diversity ranged from 0.2% to 2.1%. The mutation points were almost distributed in the whole region, but there wasn't mutation at PreC region nt.1 896 point in all sequences.

<b>CONCLUSIONb>Hepatitis B virus has complex quasispecies character in the patients with chronic hepatitis B.

Adult ; Hepatitis B Core Antigens ; genetics ; immunology ; Hepatitis B virus ; classification ; genetics ; isolation & purification ; Hepatitis B, Chronic ; virology ; Humans ; Male ; Mutation ; Promoter Regions, Genetic ; genetics ; Sequence Analysis, DNA

<b>OBJECTIVESb>To 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.

<b>METHODSb>Ten 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.

<b>RESULTSb>In 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.

<b>CONCLUSIONSb>There 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

<b>BACKGROUNDb>To study the variation of the hemorheology and microcirculation in different period of liver diseases.

<b>METHODSb>Indices for hemorheology, liver function, HBV DNA and transfusion transmitted virus (TTV) DNA were measured in 82 patients with liver diseases and correlative analysis was made.

<b>RESULTSb>The low-shear whole blood viscosity (BV) and RBC aggregation index were significantly higher in hepatitis B group than those in the control group (P less than 0.05). No correlation was found between HBV DNA and indices of hemorheology (P greater than 0.05). The high-shear and low-shear BV and hematocrit (HCT) were significantly lower in decompensated cirrhosis group than those in the control group (P less than 0.05). RBC aggregation index, plasma viscosity (PV) and the low-shear BV were significantly higher in compensated cirrhosis group than those in the control group (P less than 0.05). The high-shear and low-shear BV were significantly higher in TTV positive group than those in the control group.

<b>CONCLUSIONb>There is disturbance of microcirculation in the body of patients with hepatitis B or TTV infection. The blood of patients with compensated cirrhosis is in highly viscose status and in low viscose status in patients with decompensated cirrhosis. TTV seems to be harmful to some degree to the body. The hemorheology should be an index in detecting liver diseases in addition to HBV markers.

Adult ; Blood Viscosity ; Female ; Hemorheology ; Hepatitis B virus ; genetics ; isolation & purification ; Humans ; Liver Diseases ; physiopathology ; virology ; Male ; Microcirculation ; Middle Aged ; Torque teno virus ; genetics ; isolation & purification ; Young Adult

Animals ; DNA, Viral ; genetics ; isolation & purification ; Ducks ; Hepatitis B Virus, Duck ; genetics ; isolation & purification ; Hepatitis, Viral, Animal ; virology ; Organic Chemicals ; Polymerase Chain Reaction ; methods ; Sensitivity and Specificity

BACKGROUNDS/AIMS: Occult HBV infection is characterized by the presence of HBV infection with undetectable HBsAg. This study was carried out to find out the frequency of HBV infection in HBsAg- negative patients. METHODS: Fifty-six HBsAg-negative patients including 17 anti-HCV positive patients were evaluated. Patients were grouped according to their serological status; group A (anti-HBc+, anti-HBs-, n=16), B (anti-HBc+, anti-HBs+, n=26), and C (anti-HBc-, anti-HBs+/-, n=14). DNA was extracted from frozen liver biopsy specimen, and HBV DNA level was measured with real-time PCR. RESULTS: Overall frequency of detectable intrahepatic HBV DNA was 34% (19/56). The frequency was 56% (9/16) in group A, 31% (8/26) in group B and 14% (2/14) in group C (P=0.01). Intrahepatic HBV DNA levels were as follows; 2,010 +/- 6,660 copies/mg in group A, 6,180 +/- 29,530 copies/mg in group B and 350 +/- 1,220 copies/mg in group C. The frequency of occult HBV infection was not increased in anti-HCV positive patients. CONCLUSIONS: Intrahepatic HBV DNA is frequently detected in anti-HBc positive, HBsAg-negative patients, although the concentration is low.
Middle Aged ; Male ; Liver/*virology ; Humans ; Hepatitis B virus/*genetics/isolation & purification ; Hepatitis B Surface Antigens/*analysis ; Hepatitis B/*diagnosis/immunology/virology ; Female ; DNA, Viral/*analysis ; Aged ; Adult