title: Presence of a novel subset of NKT cells bearing an invariant V(alpha)19.1-J(alpha)26 TCR alpha chain.
abstract: CD1d-deficient (CD1d-/-) mouse lymphocytes were analyzed to classify the natural killer T (NKT) cells without reactivity to CD1d. The cells bearing a V(alpha)19.1-J(alpha)26 (AV19-AJ33) invariant TCR alpha chain, originally found in the peripheral blood lymphocytes, were demonstrated to be abundant in the NK1.1+ but not NK1.1- T cell population isolated from CD1d-/- mice. Moreover, more than half (11/21) of the hybrid cell lines established from CD1d-/- NKT cells expressed the V(alpha)19.1-J(alpha)26 invariant TCR alpha chain. The expression of the invariant V(alpha)19.1-J(alpha)26 mRNA was absent in beta2-microglobulin-deficient mice. Collectively, the present findings suggest the presence of a second NKT cell repertoire characterized by an invariant TCR alpha chain (V(alpha)19.1-J(alpha)26) that is selected by an MHC class I-like molecule other than CD1d.
authors.affiliation: Laboratory of Developmental Immunology, Mitsubishi Kagaku Institute of Life Sciences, 11 Minamiooya, Machida, 194-8511, Tokyo, Japan. michio@libra.ls.m-kagaku.co.jp
authors.forename: Michio
authors.initials: M
authors.lastname: Shimamura
authors.forename: Yi-Ying
authors.initials: YY
authors.lastname: Huang
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D000941:Antigens / Q000235:genetics / Q000378:metabolism; D018949:Antigens, CD1 / Q000235:genetics / Q000378:metabolism; D055610:Antigens, CD1d; D000950:Antigens, Ly; D000954:Antigens, Surface; D001483:Base Sequence; D001854:Bone Marrow Cells / Q000276:immunology; D018076:DNA, Complementary / Q000235:genetics; D015870:Gene Expression; D006825:Hybridomas / Q000276:immunology; D007694:Killer Cells, Natural / Q000145:classification* / Q000276:immunology*; D037181:Lectins, C-Type; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D018345:Mice, Knockout; D055651:NK Cell Lectin-Like Receptor Subfamily B; D011506:Proteins / Q000235:genetics / Q000378:metabolism; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D016693:Receptors, Antigen, T-Cell, alpha-beta / Q000235:genetics*; D016176:T-Lymphocyte Subsets / Q000276:immunology*; D014018:Tissue Distribution
chemical_list: D000941:Antigens; D018949:Antigens, CD1; D055610:Antigens, CD1d; D000950:Antigens, Ly; D000954:Antigens, Surface; D018076:DNA, Complementary; C527211:Klrb1c protein, mouse; D037181:Lectins, C-Type; D055651:NK Cell Lectin-Like Receptor Subfamily B; D011506:Proteins; D012333:RNA, Messenger; D016693:Receptors, Antigen, T-Cell, alpha-beta