title: [Association between LMP2/LMP7 gene polymorphism and the infection of hepatitis B virus].
abstract: OBJECTIVE
  To elucidate whether the antigen-processing gene (LMP2/LMP7) polymorphisms could influence the infection of hepatitis B virus.
  
  
  METHODS
  Genomic DNA of 176 patients infected with HBV and 208 healthy volunteers were extracted from the peripheral blood leukocytes. Polymorphisms of LMP genes in HBV patients were determined by polymerase chain reaction-restriction fragment length polymorphism (RFLP), the controls by DNA sequencing. We used the software PHASE1.0 to construct the haplotypes of every individual. At last the unconditional Logistic regression model was used to analyze the statistical association of genotypes or haplotypes in two groups adjusted by gender and age.
  
  
  RESULTS
  The distributions of LMP2 genes between cases and controls did not differ. However, LMP7 gene frequency in patients was higher than that in controls [odds ratio 2.11(95% confidence interval 1.36-3.26); 2.66 (95% confidence interval 1.17-6.02), heterogenous or homologous respectively]. Similarly, we found the haplotype combinated by R-K had a significant difference in two groups [odds ratio 1.81 (95% confidence interval 1.19-2.76)].
  
  
  CONCLUSIONS
  These findings suggest that polymorphisms of LMP2/LMP7 gene is one of the important host factors which independently affect on the infection of hepatitis B virus.
authors.affiliation: Department of Peking University First Hospital, Beijing 100034, China.
authors.forename: Yue
authors.initials: Y
authors.lastname: Dai
authors.forename: Tao
authors.initials: T
authors.lastname: Ning
authors.forename: Kun
authors.initials: K
authors.lastname: Li
authors.forename: Su-xia
authors.initials: SX
authors.lastname: Qi
authors.forename: Ming-wei
authors.initials: MW
authors.lastname: Jiang
authors.forename: Qing-bo
authors.initials: QB
authors.lastname: Chai
authors.forename: Yu-hui
authors.initials: YH
authors.lastname: Gai
authors.forename: Xin
authors.initials: X
authors.lastname: Wang
mesh_terms: D000328:Adult; D001483:Base Sequence; D003546:Cysteine Endopeptidases / Q000235:genetics*; D005260:Female; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006239:Haplotypes; D006509:Hepatitis B / Q000235:genetics*; D006801:Humans; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D009097:Multienzyme Complexes / Q000235:genetics*; D016017:Odds Ratio; D016133:Polymerase Chain Reaction; D012150:Polymorphism, Restriction Fragment Length; D020641:Polymorphism, Single Nucleotide; D046988:Proteasome Endopeptidase Complex
chemical_list: D009097:Multienzyme Complexes; C071313:LMP-2 protein; D003546:Cysteine Endopeptidases; C077436:LMP7 protein; D046988:Proteasome Endopeptidase Complex