title: Differential expression of adhesion molecules and chemokines between nasal and small intestinal mucosae: implications for T- and sIgA+ B-lymphocyte recruitment.
abstract: Nasal and small intestinal mucosae are the first sites of contact with infectious agents and the sites of T-cell-mediated and secreted immunoglobulin A (IgA)-mediated defences against pathogens. We investigated the factors controlling the infiltration of CD3(+) T lymphocytes and surface IgA(+) (sIgA(+)) B lymphocytes into swine epithelium and lamina propria (LP) within and between these two mucosal effector sites. Vascular addressins, vascular cell adhesion molecule 1 and mucosal addressin cell adhesion molecule-1 were reciprocally expressed in both mucosae. Strong expression of alpha(4)beta(1) relative to alpha(4)beta(7) was characteristic of CD3(+) T cells in nasal mucosa LP and epithelium and of sIgA(+) cells in nasal mucosa epithelium. The same profile was observed on corresponding blood cells. Conversely, higher levels of integrins beta(7) and alpha(4)beta(7) than alpha(4)beta(1) were characteristic of CD3(+) T cells and sIgA(+) cells in the small intestine. However, about 40% of the LP-activated sIgA(+) cells displayed sIgA(high), integrin alpha(4) and integrin alpha(4) expression. Whereas CCL19, CXCL12, CCL21 and CCL28 messenger RNAs were similarly expressed in both mucosae, CCL25 messenger RNA was only expressed in the small intestine. Thus, the nasal and small intestine mucosae represent separate compartments for infiltration by CD3(+) T cells and sIgA(+) effector cells, with the exception of a population of small intestine activated sIgA(+) cells, which may gain access to both mucosae.
authors.affiliation: UR1282, Infectiologie Animale et Santé Publique, IASP, Nouzilly, France.
authors.forename: Dorothée
authors.initials: D
authors.lastname: Bourges
authors.forename: Claire
authors.initials: C
authors.lastname: Chevaleyre
authors.forename: CaiHong
authors.initials: C
authors.lastname: Wang
authors.forename: Mustapha
authors.initials: M
authors.lastname: Berri
authors.forename: XiaoMei
authors.initials: X
authors.lastname: Zhang
authors.forename: Laetitia
authors.initials: L
authors.lastname: Nicaise
authors.forename: François
authors.initials: F
authors.lastname: Meurens
authors.forename: Henri
authors.initials: H
authors.lastname: Salmon
mesh_terms: D000818:Animals; D016175:B-Lymphocyte Subsets / Q000276:immunology; D015815:Cell Adhesion Molecules / Q000378:metabolism*; D018925:Chemokines / Q000235:genetics / Q000378:metabolism*; D002634:Chemotaxis, Leukocyte / Q000276:immunology; D004730:Endothelium, Vascular / Q000378:metabolism; D015870:Gene Expression / Q000276:immunology; D018928:Immunity, Mucosal; D007071:Immunoglobulin A, Secretory / Q000032:analysis; D016023:Integrins / Q000378:metabolism; D007413:Intestinal Mucosa / Q000098:blood supply / Q000276:immunology*; D007421:Intestine, Small / Q000098:blood supply / Q000276:immunology*; D009297:Nasal Mucosa / Q000098:blood supply / Q000276:immunology*; D012333:RNA, Messenger / Q000235:genetics; D017455:Receptors, IgE / Q000032:analysis; D013552:Swine; D013556:Swine, Miniature; D016176:T-Lymphocyte Subsets / Q000276:immunology; D019010:Vascular Cell Adhesion Molecule-1 / Q000378:metabolism
chemical_list: D015815:Cell Adhesion Molecules; D018925:Chemokines; D007071:Immunoglobulin A, Secretory; D016023:Integrins; D012333:RNA, Messenger; D017455:Receptors, IgE; D019010:Vascular Cell Adhesion Molecule-1