title: Antigen-induced chemokine activation in mouse buccal epithelium.
abstract: The oral mucosa is an active though poorly understood immunological site. Using an experimental animal system involving antigen priming into the oral mucosa of transgenic mice expressing T cell receptor (TCR) for a peptide antigen of hen-egg lysozyme (HEL), the expression of six chemokine receptors and seven chemokine ligands were studied before and after antigen exposure. Within 24h of local antigen priming, the expression of three chemokine receptor genes (CCR3, CCR5, and CCR7) and three chemokine ligand genes (CCL12, CCL19, and CCL25) were significantly upregulated. These included chemokines known to be responsible for the trafficking of T cells and other leukocytes into tissue sites. Additionally, expression of the chemokine ligand gene, CCL25 (thymus-expressed chemokine [TECK]), which has been linked to T cell migration and/or local T cell development in the intestine, was also markedly elevated in buccal epithelia after antigen exposure. These findings define a process of selective activation of proinflammatory chemokines and/or their receptors following local antigen exposure, and they provide the first evidence, indicating that this may be accompanied by in situ development of T cells in oral tissues.
authors.affiliation: Department of Basic Sciences, University of Texas Health Science Center, Dental Branch, Rm 4.133, 6516 M.D. Anderson Blvd., Houston, TX 77030, USA.
authors.forename: Kevin
authors.initials: K
authors.lastname: Otten
authors.forename: Jolene
authors.initials: J
authors.lastname: Dragoo
authors.forename: Heuy-Ching
authors.initials: HC
authors.lastname: Wang
authors.forename: John R
authors.initials: JR
authors.lastname: Klein
mesh_terms: D000818:Animals; D000941:Antigens / Q000276:immunology; D002610:Cheek; D018925:Chemokines / Q000096:biosynthesis* / Q000235:genetics; D019742:Chemokines, CC / Q000096:biosynthesis / Q000235:genetics; D004848:Epithelium / Q000276:immunology; D005786:Gene Expression Regulation; D019672:Genes, T-Cell Receptor; D007700:Kinetics; D051379:Mice; D008822:Mice, Transgenic; D009061:Mouth Mucosa / Q000276:immunology*; D009113:Muramidase / Q000276:immunology; D054388:Receptors, CCR; D019707:Receptors, Chemokine / Q000096:biosynthesis* / Q000235:genetics; D015854:Up-Regulation
chemical_list: D000941:Antigens; C119309:CC chemokine receptor 9; C491541:Ccl25 protein, mouse; D018925:Chemokines; D019742:Chemokines, CC; D054388:Receptors, CCR; D019707:Receptors, Chemokine; C421864:hen egg lysozyme; D009113:Muramidase