title: Analysis of T cell receptor variable regions and complementarity determining region 3 of infiltrating T lymphocytes in the liver of patients with chronic type B hepatitis.
abstract: OBJECTIVE
  T cell receptor (TCR) variable regions and complementarity determining regions 3 (CDR3) of infiltrating T cells in the livers of patients with chronic hepatitis B were examined in detail.
  
  
  METHODS
  TCR usage was examined by the inverse polymerase chain reaction in 2 hepatitis B e antigen-positive patients, one at an early stage and the other at an advanced stage.
  
  
  RESULTS
  In 61 productively rearranged clones bearing TCRalpha genes in the liver of the patient with early stage chronic hepatitis B, the Valpha 7.2 gene segment was most frequently used (16.4%), while the other Valpha gene segments were used less frequently. All but one of the clones with the Valpha7.2 gene were joined with the Jalpha33 gene, and the CDR3 regions of these clones were the same length and similar in amino acid sequence. In contrast, in 68 productively rearranged clones from the liver of the patient with advanced stage disease, all Valpha gene segments were used less frequently, and combinations of the Valpha and Jalpha gene segments varied.
  
  
  CONCLUSIONS
  Our data suggest a relatively restricted usage of TCR in the liver in early stage chronic hepatitis B.
authors.affiliation: Department of Medicine and Clinical Oncology, Graduate School of Medicine, Chiba University, Chiba, Japan.
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Maru
authors.forename: Osamu
authors.initials: O
authors.lastname: Yokosuka
authors.forename: Fumio
authors.initials: F
authors.lastname: Imazeki
authors.forename: Hiromitsu
authors.initials: H
authors.lastname: Saisho
authors.forename: Masao
authors.initials: M
authors.lastname: Omata
mesh_terms: D000328:Adult; D000595:Amino Acid Sequence; D002999:Clone Cells; D022801:Complementarity Determining Regions / Q000737:chemistry* / Q000235:genetics; D005260:Female; D015332:Gene Rearrangement, alpha-Chain T-Cell Antigen Receptor; D015333:Gene Rearrangement, beta-Chain T-Cell Antigen Receptor; D019673:Genes, T-Cell Receptor alpha / Q000235:genetics; D019674:Genes, T-Cell Receptor beta / Q000235:genetics; D006515:Hepatitis B virus / Q000276:immunology; D019694:Hepatitis B, Chronic / Q000276:immunology / Q000503:physiopathology / Q000821:virology; D006801:Humans; D008099:Liver / Q000276:immunology* / Q000473:pathology / Q000821:virology; D008969:Molecular Sequence Data; D009154:Mutation; D016133:Polymerase Chain Reaction; D016693:Receptors, Antigen, T-Cell, alpha-beta / Q000737:chemistry* / Q000235:genetics; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology*
chemical_list: D022801:Complementarity Determining Regions; D016693:Receptors, Antigen, T-Cell, alpha-beta