title: Positive and negative selection in transgenic mice expressing a T-cell receptor specific for influenza nucleoprotein and endogenous superantigen.
abstract: A transgenic mouse was generated expressing on most (> 80%) of thymocytes and peripheral T cells a T-cell receptor isolated from a cytotoxic T-cell clone (F5). This clone is CD8+ and recognizes alpha alpha 366-374 of the nucleoprotein (NP 366-374) of influenza virus (A/NT/60/68), in the context of Class I MHC Db (Townsend et al., 1986). The receptor utilizes the V beta 11 and V alpha 4 gene segments for the beta chain and alpha chain, respectively (Palmer et al., 1989). The usage of V beta 11 makes this TcR reactive to Class II IE molecules and an endogenous ligand recently identified as a product of the endogenous mammary tumour viruses (Mtv) 8, 9, and 11 (Dyson et al., 1991). Here we report the development of F5 transgenic T cells and their function in mice of the appropriate MHC (C57BL/10 H-2b, IE-) or in mice expressing Class II MHC IE (e.g., CBA/Ca H-2k and BALB/c H-2d) and the endogenous Mtv ligands. Positive selection of CD8+ T cells expressing the V beta 11 is seen in C57BL/10 transgenic mice (H-2b). Peripheral T cells from these mice are capable of killing target cells in an antigen-dependent manner after a period of in vitro culture with IL-2. In the presence of Class II MHC IE molecules and the endogenous Mtv ligand, most of the single-positive cells carrying the transgenic T-cell receptor are absent in the thymus. Unexpectedly, CD8+ peripheral T-cells in these (H-2k or H-2d) F5 mice are predominantly V beta 11 positive and also have the capacity to kill targets in an antigen-dependent manner. This is true even following backcrossing of the F5 TcR transgene to H-2d scid/scid mice, in which functional rearrangement of endogenous TcR alpha- and beta-chain genes is impaired.
authors.affiliation: Laboratory of Molecular Immunology, National Institute for Medical Research, Mill Hill, London, U.K.
authors.forename: C
authors.initials: C
authors.lastname: Mamalaki
authors.forename: J
authors.initials: J
authors.lastname: Elliott
authors.forename: T
authors.initials: T
authors.lastname: Norton
authors.forename: N
authors.initials: N
authors.lastname: Yannoutsos
authors.forename: A R
authors.initials: AR
authors.lastname: Townsend
authors.forename: P
authors.initials: P
authors.lastname: Chandler
authors.forename: E
authors.initials: E
authors.lastname: Simpson
authors.forename: D
authors.initials: D
authors.lastname: Kioussis
mesh_terms: D000818:Animals; D003601:Cytotoxicity Tests, Immunologic; D018076:DNA, Complementary; D008198:Lymph Nodes / Q000166:cytology / Q000276:immunology; D008285:Major Histocompatibility Complex / Q000502:physiology; D051379:Mice; D008810:Mice, Inbred C57BL; D008822:Mice, Transgenic; D009698:Nucleoproteins / Q000276:immunology; D009975:Orthomyxoviridae / Q000276:immunology*; D016693:Receptors, Antigen, T-Cell, alpha-beta / Q000276:immunology*; D013154:Spleen / Q000166:cytology / Q000276:immunology; D018089:Superantigens / Q000276:immunology*; D016176:T-Lymphocyte Subsets; D013950:Thymus Gland / Q000166:cytology / Q000276:immunology; D014764:Viral Proteins / Q000276:immunology
chemical_list: D018076:DNA, Complementary; D009698:Nucleoproteins; D016693:Receptors, Antigen, T-Cell, alpha-beta; D018089:Superantigens; D014764:Viral Proteins