title: Derivation of T-cell receptor alpha-chain double expresser lines from normal murine mature T cells.
abstract: Because the T-cell receptor (TCR) alpha-chain locus is known to lack allelic exclusion of rearrangements, and as a recent report revealed the existence of alpha-chain double expressers among normal human peripheral blood lymphocytes (PBL), the possible existence of TCR alpha-chain double expressers among mature murine T cells was examined. Although two-colour staining analysis of normal T-cell populations did not immediately reveal recognizable clusters of V alpha double expressers, alternative in vitro stimulations of normal murine T cells with antibodies to two different TCR V alpha chains reproducibly induced TCR alpha-chain double-expresser lines. TCR complexes with different alpha-chains on such T cells were both shown to be functional. The cell lines were heterogeneous with respect to V beta usage and the ratio of the expressed amounts of the two alpha-chains on the surface. The ratio of the two expressed alpha-chains was found to be very stable over a long period of time. These results are consistent with the earlier report on alpha-chain double expressers among human T cells and also show normal occurrence of TCR alpha-chain double expressers in murine T-cell populations.
authors.affiliation: Department of Applied Biological Chemistry, University of Tokyo, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Eshima
authors.forename: H
authors.initials: H
authors.lastname: Suzuki
authors.forename: S
authors.initials: S
authors.lastname: Yamazaki
authors.forename: N
authors.initials: N
authors.lastname: Shinohara
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal; D018929:Cell Culture Techniques; D002455:Cell Division / Q000276:immunology; D002460:Cell Line; D003602:Cytotoxicity, Immunologic; D005089:Exocytosis / Q000276:immunology; D005434:Flow Cytometry; D051379:Mice; D008810:Mice, Inbred C57BL; D008815:Mice, Inbred Strains; D016693:Receptors, Antigen, T-Cell, alpha-beta / Q000032:analysis* / Q000276:immunology; D013154:Spleen / Q000276:immunology; D016176:T-Lymphocyte Subsets / Q000166:cytology / Q000276:immunology*
chemical_list: D000911:Antibodies, Monoclonal; D016693:Receptors, Antigen, T-Cell, alpha-beta