title: Universal skew of T cell receptor (TCR) V beta usage for Crohn's disease (CrD).
abstract: It would be of clear interest and importance to identify T cell populations which correlate with the initiation of some T cell-mediated diseases; however, it is difficult to observe the initial response of T cells in these diseases because of modification due to immunosuppressive treatment. We investigated T cell receptor (TCR) V beta usage in both affected and unaffected mucosa from 16 patients with active Crohn's disease (CrD), undergoing nutritional therapy without any immunomodulatory medications. Semiquantitative reverse transcriptase-polymerase chain reaction showed increased expression of V beta 12 and 13 in the entire mucosa of CrD but not in the controls. This was confirmed by introducing a random cloning method. Such skewing was observed primarily in CD4+ lamina propria lymphocytes. DNA sequence analysis demonstrated a striking clonal expansion of V beta 12 T cells, but the dominant clones were not identical in the patients. These findings suggest the importance of superantigen as well as specific T cell response in the pathogenesis of CrD.
authors.affiliation: Department of Medicine III, Osaka University Medical School, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Ogawa
authors.forename: H
authors.initials: H
authors.lastname: Ito
authors.forename: A
authors.initials: A
authors.lastname: Takeda
authors.forename: S
authors.initials: S
authors.lastname: Kanazawa
authors.forename: M
authors.initials: M
authors.lastname: Yamamoto
authors.forename: H
authors.initials: H
authors.lastname: Nakamura
authors.forename: Y
authors.initials: Y
authors.lastname: Kimura
authors.forename: K
authors.initials: K
authors.lastname: Yoshizaki
authors.forename: T
authors.initials: T
authors.lastname: Kishimoto
mesh_terms: D000328:Adult; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology*; D018414:CD8-Positive T-Lymphocytes / Q000276:immunology*; D003001:Cloning, Molecular; D003424:Crohn Disease / Q000276:immunology*; D005260:Female; D015870:Gene Expression; D006801:Humans; D007413:Intestinal Mucosa / Q000276:immunology*; D007564:Japan; D008297:Male; D016133:Polymerase Chain Reaction; D012333:RNA, Messenger / Q000032:analysis / Q000235:genetics; D016693:Receptors, Antigen, T-Cell, alpha-beta / Q000235:genetics* / Q000276:immunology
chemical_list: D012333:RNA, Messenger; D016693:Receptors, Antigen, T-Cell, alpha-beta