title: Indicators of salivary gland inflammation in primary Sjogren's syndrome.
abstract: The aim of this study was to establish additional indicators in saliva and plasma which are associated with salivary gland inflammation in patients with primary Sjögren's syndrome (SS). ELISA assays were used to determine the concentrations of sICAM-1, sVCAM-1, sIL-2R alpha, IgA, IgG, calprotectin and albumin in parotid saliva, whole saliva and plasma samples. Soluble ICAM-1 was present in whole and parotid saliva samples from primary SS patients. Soluble VCAM-1 and sIL-2R alpha could not be detected in salivary samples from either primary SS or control subjects. IgA, IgG, calprotectin and albumin concentrations were higher in both whole and parotid saliva in the patient group compared with the control group. The results showed increased levels of calprotectin in all saliva samples compared to plasma, suggesting that calprotectin may be locally produced. Increased plasma values of sICAM-1, sVCAM-1, sIL-2R alpha, IgA, IgG and calprotectin were detected in primary SS patients when compared to controls. The output/min of IgA, IgG, calprotectin and albumin was decreased in SS patients. Plasma levels of various proteins could offer information concerning glandular and extraglandular inflammatory processes. However, salivary levels of these proteins (particularly sICAM-1) tend to reflect more the local inflammatory activity, providing a convenient and non-invasive tool for diagnosis.
authors.affiliation: Broegelmann Research Laboratory, University of Bergen, Norway. Mihaela.Cuida@cih.uib.no
authors.forename: M
authors.initials: M
authors.lastname: Cuida
authors.forename: A K
authors.initials: AK
authors.lastname: Halse
authors.forename: A C
authors.initials: AC
authors.lastname: Johannessen
authors.forename: T
authors.initials: T
authors.lastname: Tynning
authors.forename: R
authors.initials: R
authors.lastname: Jonsson
mesh_terms: D000328:Adult; D000368:Aged; D000418:Albumins / Q000032:analysis; D000954:Antigens, Surface / Q000032:analysis / Q000097:blood; D002135:Calcium-Binding Proteins / Q000032:analysis / Q000097:blood; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D006801:Humans; D007070:Immunoglobulin A / Q000097:blood; D007071:Immunoglobulin A, Secretory / Q000032:analysis / Q000097:blood; D007074:Immunoglobulin G / Q000032:analysis / Q000097:blood; D018836:Inflammation Mediators / Q000032:analysis / Q000097:blood; D018799:Intercellular Adhesion Molecule-1 / Q000032:analysis / Q000097:blood; D039841:Leukocyte L1 Antigen Complex; D008875:Middle Aged; D019006:Neural Cell Adhesion Molecules / Q000032:analysis / Q000097:blood; D010306:Parotid Gland / Q000378:metabolism; D015375:Receptors, Interleukin-2 / Q000032:analysis / Q000097:blood; D012463:Saliva / Q000737:chemistry*; D012709:Serum Albumin / Q000032:analysis; D012793:Sialadenitis / Q000097:blood / Q000378:metabolism* / Q000473:pathology; D012859:Sjogren's Syndrome / Q000097:blood / Q000378:metabolism* / Q000473:pathology; D019010:Vascular Cell Adhesion Molecule-1 / Q000032:analysis / Q000097:blood
chemical_list: D000418:Albumins; D000954:Antigens, Surface; D002135:Calcium-Binding Proteins; D007070:Immunoglobulin A; D007071:Immunoglobulin A, Secretory; D007074:Immunoglobulin G; D018836:Inflammation Mediators; D039841:Leukocyte L1 Antigen Complex; D019006:Neural Cell Adhesion Molecules; D015375:Receptors, Interleukin-2; D012709:Serum Albumin; D019010:Vascular Cell Adhesion Molecule-1; D018799:Intercellular Adhesion Molecule-1