Study Status: Completed
Recruit Status: Completed
Study Type: Interventional
Official Title: Diagnostic Biomarkers Related to Periodontal Disease Activity in Diabetic
Brief Summary: The purpose of the study was to monitor the activity of periodontal disease and suggest potential biomarkers related to active periodontal disease in patients with chronic periodontitis (PD) associated or not with type 2 diabetes mellitus (DM), based on the evaluation of the profile of gene expression of periodontal sites and the evaluation of inflammatory salivary proteins. Two hundred and five periodontal patients were enrolled, but only 41 exhibited ≥ 1 mm attachment loss in at least three periodontal site (active sites) 2 months after non-surgical periodontal therapy. The final sample was: 21 patients with chronic periodontitis (PD group) and 20 with chronic periodontitis and diabetes (PD+DM group). Fifteen periodontal- and systemically healthy patients were included as control group. Saliva collection, glycated hemoglobin measurement, periodontal examination and radiographs were conducted before and 2 months after non-surgical periodontal therapy. Radiographic subtraction was performed from pairs of the radiographs. Measurements of the areas with density loss were recorded. Gingival biopsies of active and non-active sites with similar clinical parameters were harvested for Real Time Polymerase Chain Reaction Array gene expression analysis. Saliva samples were analyzed by Multiplex Cytokine Profiling Immunoassay for analysis of protein expression. The clinical attachment loss mean was higher in the PD+DM group (p<0.05). There was a high correlation between clinical attachment loss and darkened radiographic areas in active sites of the PD group and PD+DM group. When compared PD group to PD+DM, patients with diabetes had an up-regulated profile. Active sites of the PD group showed nine genes (specific chemokines, interleukins and receptors) differentially expressed with an up-regulated profile. Active sites of the PD+DM group showed six genes (specific chemokines, interleukins and receptors) differentially expressed with an up-regulated profile. After per