THU0561 Salivary IL-1 Alpha and IL-1 Beta Levels Associated with Oral Mucosal Disease Activity in Behcet's Disease

BackgroundRecurrent oral aphthous ulcers are the common manifestation of the Behçet's disease, and they are indistinguishable from ulcers of recurrent aphthous stomatitis (RAS). There is no reliable biomarker reflecting disease activity in BD, and systemic acute phase reactants are not helpful in evaluation of active disease, especially in patients with predominantly mucocutaneous activity.ObjectivesWe aimed to assess the potential of salivary interleukin-1 alpha and beta (IL-1A and IL-1B) concentrations as well as two S100 proteins, namely S100A12 (calprotectin) and S100A13 in comparison to their serum levels in BD, RAS, and healthy controls.MethodsA total of 67 patients with BD, 43 patients with RAS, and 22 healthy controls with no history of aphthous ulcers or other oral mucosal disorders (NA) comprised the study group. BD patients fulfilled the ISG criteria for the diagnosis, and patients with active systemic disease were excluded. Patients with BD and RAS were classified as active and inactive according to the presence or absence of aphthous ulcers at the time of sample collection. Unstimulated saliva and serum samples were collected after overnight fasting. IL-1A, IL-1B, S100A13 and calprotectin levels were measured by ELISA, and concomitant measurements of ESR and serum CRP levels of BD patients were recorded.ResultsAt the time of sample collection, 38 BD patients (18 male, mean age: 39,1±10,3) were classified as active and 29 patients (18 male, mean age: 38,9±10,5) as inactive. Similarly, 19 patients with RAS (11 male, mean age: 36,6±8,7) were active and 24 patients (7 male, mean age: 36,7±10,1) were inactive state. Mean values of salivary and serum ELISA measurements are given in Table 1. Salivary IL-1A and IL-1B levels were higher in BD patients compared to RAS and NA even during inactive state (IL-1A p