Expression of cell-adhesion molecules in the salivary gland microenvironment of Sjögren's syndrome.
OBJECTIVE
The potential role of cell adhesion molecules in the pathogenesis of Sjögren's syndrome (SS) was assessed by examining their expression in salivary gland (SGL) tissue.


METHODS
Intercellular adhesion molecule type 1 (ICAM-1), lymphocyte function-associated antigen type 1 (LFA-1), LFA-3, CD2, and CD44 expression were determined using indirect immunofluorescence techniques.


RESULTS
In inflamed labial SGL tissue, ICAM-1 expression was evident on infiltrating LFA-1+/CD2+/LFA-3+ mononuclear cells, and to a limited extent on SGL acinar epithelial cells adjacent to sites of intense inflammation.


CONCLUSIONS
In SS, the SGL microenvironment is characterized by only a modest up-regulation of ICAM-1 expression on epithelial cells, despite the presence of T cells bearing an activated phenotype.
St Clair
E W
EW
Department of Medicine, Duke University Medical Center, Durham, NC 27710.
Angellilo
J C
JC
Singer
K H
KH
D000328:Adult; D000945:Antigens, Differentiation, T-Lymphocyte / Q000032:analysis / Q000235:genetics; D000954:Antigens, Surface / Q000032:analysis / Q000235:genetics; D018801:CD2 Antigens; D018968:CD58 Antigens; D015815:Cell Adhesion Molecules / Q000032:analysis* / Q000235:genetics / Q000378:metabolism; D002478:Cells, Cultured; D004848:Epithelium / Q000737:chemistry / Q000378:metabolism / Q000473:pathology; D005260:Female; D005455:Fluorescent Antibody Technique; D015870:Gene Expression; D006801:Humans; D018799:Intercellular Adhesion Molecule-1; D016169:Lymphocyte Function-Associated Antigen-1 / Q000032:analysis / Q000235:genetics; D008297:Male; D008562:Membrane Glycoproteins / Q000032:analysis / Q000235:genetics; D008875:Middle Aged; D011971:Receptors, Immunologic / Q000032:analysis / Q000235:genetics; D016201:Receptors, Lymphocyte Homing / Q000032:analysis / Q000235:genetics; D012469:Salivary Glands / Q000737:chemistry* / Q000378:metabolism / Q000473:pathology; D012859:Sjogren's Syndrome / Q000235:genetics / Q000378:metabolism* / Q000473:pathology; D015854:Up-Regulation / Q000235:genetics
D000945:Antigens, Differentiation, T-Lymphocyte; D000954:Antigens, Surface; D018801:CD2 Antigens; D018968:CD58 Antigens; D015815:Cell Adhesion Molecules; D016169:Lymphocyte Function-Associated Antigen-1; D008562:Membrane Glycoproteins; D011971:Receptors, Immunologic; D016201:Receptors, Lymphocyte Homing; D018799:Intercellular Adhesion Molecule-1