title: Hot spot mutations of hepatitis B virus pre-C/C gene and its promotor in Chinese patients and the clinical implications.
abstract: OBJECTIVE
  To study if the functions of C gene and its promotor are related to the pathogenesis of hepatitis B and to describe their hot spot mutations in Chinese patients.
  
  
  METHODS
  We have studied this subject in recent years. A mini-review is based on some unpublished works.
  
  
  METHODS
  The sequence data of C gene and core promotor (cp) of hepatitis B virus (HBV) were analysed in the asymptomatic carriers (AsC) and the patients of hepatitis with various severity.
  
  
  RESULTS
  Pre-C A1896 mutation occurred in 67% of anti-HBe-positive and 38% of HBeAg-positive cases. All were chronic infections. In C gene, 8 missense mutations in the segment of codon 48-60, and 28 in codon 84-101 were found, more in severe patients. The cp mutations of nt 1762 and nt 1764 occurred more in HBeAg-negative than in positive cases (49% vs 20%), and more in patients than in AsC (56% vs 10%).
  
  
  CONCLUSIONS
  A1896 often occurred in nature infection course. The cp and clustering C gene mutations would more frequently lead to prolonged active infection and advanced liver diseases.
authors.affiliation: Nanfang Hospital, Guangzhou 510515, China.
authors.forename: K
authors.initials: K
authors.lastname: Luo
mesh_terms: D001483:Base Sequence; D005814:Genes, Viral; D006509:Hepatitis B / Q000821:virology*; D006515:Hepatitis B virus / Q000235:genetics*; D019694:Hepatitis B, Chronic / Q000821:virology; D006801:Humans; D008969:Molecular Sequence Data; D009154:Mutation; D011401:Promoter Regions, Genetic / Q000235:genetics; D014758:Viral Core Proteins / Q000235:genetics*
chemical_list: D014758:Viral Core Proteins