Molecular characterization of hepatitis B virus basal core promoter and precore region of isolates from chronic hepatitis B patients.
PMID: 34111075
2021
JPMA. The Journal of the Pakistan Medical Association
Abstract: Classic A1762T/G1764A double mutation was noted in 15(30%) isolates.
Specific determination of hepatitis B e antigen by antibodies targeting precore unique epitope facilitates clinical diagnosis and drug evaluation against hepatitis B virus infection.
Result: In addition, among these patients, 16 were infected with HBV strain harbouring basic core promoter (BCP) mutation A1762T/G1764A, whereas the remaining 45 patients were infected with BCP wild-type strain.
Compartmentalized evolution of hepatitis B virus contributes differently to the prognosis of hepatocellular carcinoma.
Abstract: HBV QC and A1762T/G1764A in the sera and tumors have contrary prognostic effects in HCC.
Abstract: High-frequent A1762T/G1764A in the sera predicted an unfavorable RFS (P < 0.001), whereas, in the tumors, it predicted a favorable RFS (P = 0.035).
Impacts of the Percentage of Basal Core Promoter Mutation on the Progression of Liver Fibrosis After Hepatitis B e Antigen Seroconversion.
PMID: 32860707
2021
The Journal of infectious diseases
Abstract: CONCLUSIONS: The percentage of A1762T/G1764A mutations after HBeAg seroconversion was associated with liver fibrosis.
Abstract: Hepatitis B e antigen seroconversion age is positively correlated with the percentages of A1762T/G1764A mutation at inflammatory phase before HBeAg seroconversion.
Abstract: RESULTS: We demonstrated that the percentages of A1762T/G1764A mutation are significantly higher in subjects with an LSM >7 kPa than in those with an LSM <=7 kPa after HBeAg seroconversion.
Abstract: Subjects who underwent interferon, entecavir, or tenofovir disoproxil
Viral hepatitis B and C in HIV-exposed South African infants.
5Result: The ""Week 0"" Cape Town sample showed a similar serological profile to the ""Week 48"" sample from the same child and also had the double A1762T/G1764A BCP mutation."
Abstract: The Result: Both sequences harboured the double A1762T/G1764A BCP mutation.
Result: Sequence analysis revealed the M204I mutation in the reverse transcriptase domain of the polymerase gene in the Durban sample while the Cape Town sample harboured the double A1762T/G1764A BCP mutation in the core gene.
Optimization of the algorithm diagnosis chronic hepatitis B markers in patients with newly diagnosed HIV infection.
Abstract: When analyzing the basal nucleus promoter, Precore and Core regions, 22.2% of patients with the double mutation A1762T / G1764A, 25% with the mutation G1896A were identified.
Quadruple mutation GCAC1809-1812TTCT acts as a biomarker in healthy European HBV carriers.
Abstract: Calculation of the pgRNA secondary structure suggests a destabilization of the pgRNA structure by A1762T/G1764A that was compensated by GCAC1809-1812TTCT.
Abstract: GCAC1809-1812TTCT was strongly associated with coexistence of basal core promoter (BCP) double mutation A1762T/G1764A and lower HBV DNA levels.
Introduction: For example, the double mutation A1762T/G1764A is the most common mutation in BCP and was found in some studies to be associated with progression to advanced liver disease and HCC development.
Introduction: However, altho
Differences in HBV Replication, APOBEC3 Family Expression, and Inflammatory Cytokine Levels Between Wild-Type HBV and Pre-core (G1896A) or Basal Core Promoter (A1762T/G1764A) Mutants.
Abstract: HBV variants, particularly the G1896A pre-core (PC) and A1762T/G1764A basal core promoter (BCP) mutations, are established risk factors for cirrhosis and HCC, but the molecular biological basis is unclear.
Abstract: RESULTS: HBeAg expression was reduced in PC and BCP variants, and higher supernatant HBV DNA and HBV RNA levels were found with A1762T/G1764A vs. G1896A mutant (p_< 0.05).
Result: As expected, HBeAg expression differed with the greatest levels i
The genetic polymorphism down-regulating HLA-DRB1 enhancer activity facilitates HBV persistence, evolution and hepatocarcinogenesis in the Chinese Han population.
Abstract: rs3135395-T, rs477515-T and rs2395178-G were inversely associated with the generation of A1762T/G1764A, T1753V and C1653T, the HCC-risk HBV mutations.
[Relationship between mutations of HBV basal core promoter region in HBsAg-positive mothers and intrauterine transmission].
PMID: 32564557
2020
Zhonghua liu xing bing xue za zhi
Abstract: Conclusion: A1762T/G1764A double mutations of HBV DNA from the genotype C of those HBsAg-positive mothers could reduced the risk of HBV intrauterine transmission during pregnancy.
Abstract: Maternal A1762T/G1764A double mutations appeared to be possibly associated with neonatal HBeAg (P=0.050).
Abstract: Rates of A1762T/G1764A double mutations were significantly different between the intrauterine transmission group and the control group (7.53% vs.
Abstract: Results from the multivariate analysis showed that the A1762T/G1764A double mutations had reduced the risk of intrauterine transmission (aOR=0.065, 95%CI:
HBV mutation literature information.
PMID: 
2021
JPMA. The Journal of the Pakistan Medical Association
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