title: Unique CD4(+) T cells in TCR alpha chain-deficient class I MHC-restricted TCR transgenic mice: role in a superantigen-mediated disease process.
abstract: Mice carrying a transgenic TCR with targeted disruption of the TCR alpha chain (H-Y alpha(-/-)) possess CD4(+) T cells which express the transgenic TCR beta without the alpha chain. These mice developed the murine acquired immunodeficiency syndrome (MAIDS) after infection with LP-BM5 retroviruses, a process which requires CD4(+) T cells. These cells are negative for TCR delta chain and pre-TCR alpha chain expression, and thus express a unique surface receptor with the TCR beta chain as a component. The cells respond to MAIDS virus-associated superantigen and concanavalin A, but not to protein antigens such as ovalbumin. Thus, this novel surface receptor appears to play an important role in the pathogenesis of MAIDS.
authors.affiliation: Center for Immunology, and Departments of Pediatrics and Pathology, Washington University School of Medicine, St Louis, MO 63110, USA.
authors.forename: R J
authors.initials: RJ
authors.lastname: Hayashi
authors.forename: O
authors.initials: O
authors.lastname: Kanagawa
mesh_terms: D000818:Animals; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology*; D018414:CD8-Positive T-Lymphocytes / Q000276:immunology; D002454:Cell Differentiation; D002478:Cells, Cultured; D005260:Female; D016654:Genes, RAG-1 / Q000235:genetics; D006825:Hybridomas / Q000276:immunology; D018655:Lymphocyte Count; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D008822:Mice, Transgenic; D016183:Murine Acquired Immunodeficiency Syndrome / Q000276:immunology*; D011948:Receptors, Antigen, T-Cell / Q000235:genetics / Q000378:metabolism / Q000502:physiology*; D012190:Retroviridae
chemical_list: D011948:Receptors, Antigen, T-Cell