title: Identification of a commonly used CDR3 region of infiltrating T cells expressing Vbeta13 and Vbeta15 derived from psoriasis patients.
abstract: Psoriasis is a common inflammatory skin disease that is thought to be mediated by activated T cells. In this study, the complementarity-determining region 3 (CDR3) in T cell receptors was examined for a common sequence motif among the T cells infiltrated in psoriatic lesional skin. A common specific CDR3 motif (Vbeta13-DWTSGV-Jbeta2.7) in lesions from psoriasis patients was identified by polymerase-chain-reaction-based spectratyping analysis and DNA sequencing. In addition, VDJ rearrangement with highly homologous amino acid composition in the CDR3 was observed in Vbeta15 of T cell receptors in lesions derived from psoriatic patients. Remarkably, T cell receptors containing the Vbeta13-DWTSGV-Jbeta2.7 were also found in the clinically normal skin from the psoriasis patients, which might seem to be responsible for the artificial production of psoriatic lesions. The identified CDR3 motif was highly expressed in cutaneous lymphocyte antigen (CLA+) cells of peripheral blood mononuclear cells from psoriasis patients compared with the expression in healthy individuals. This result showed that the infiltrated CLA+ T cells with the Vbeta13-DWTSGV-Jbeta2.7 motif in peripheral blood mononuclear cells from psoriasis patients might be involved in the development of psoriatic lesions. In addition, the results in this study suggest that the infiltrated T cells with the Vbeta13-DWTSGV-Jbeta2.7 motif in psoriatic lesions may be involved in the pathogenesis of psoriasis.
authors.affiliation: Laboratory of Dermatology-Immunology, Catholic Research Institute of Medical Science, College of Medicine, The Catholic University of Korea, Seoul, Korea.
authors.forename: Ha Young
authors.initials: HY
authors.lastname: Hwang
authors.forename: Young Yil
authors.initials: YY
authors.lastname: Bahk
authors.forename: Tai-Gyu
authors.initials: TG
authors.lastname: Kim
authors.forename: Tae-Yoon
authors.initials: TY
authors.lastname: Kim
mesh_terms: D020816:Amino Acid Motifs; D000595:Amino Acid Sequence / Q000235:genetics; D000945:Antigens, Differentiation, T-Lymphocyte; D000951:Antigens, Neoplasm; D022801:Complementarity Determining Regions; D015333:Gene Rearrangement, beta-Chain T-Cell Antigen Receptor; D006801:Humans; D008562:Membrane Glycoproteins / Q000032:analysis; D008969:Molecular Sequence Data; D009000:Monocytes / Q000276:immunology; D011565:Psoriasis / Q000276:immunology* / Q000473:pathology; D016693:Receptors, Antigen, T-Cell, alpha-beta / Q000235:genetics / Q000378:metabolism*; D012016:Reference Values; D012867:Skin / Q000276:immunology / Q000473:pathology; D013601:T-Lymphocytes / Q000276:immunology* / Q000473:pathology
chemical_list: D000945:Antigens, Differentiation, T-Lymphocyte; D000951:Antigens, Neoplasm; C063419:CTAGE1 protein, human; D022801:Complementarity Determining Regions; D008562:Membrane Glycoproteins; D016693:Receptors, Antigen, T-Cell, alpha-beta