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New research finds major activation themes in denture-stomatitis
Date:7/15/2010

Barcelona, Spain Today during the 88th General Session & Exhibition of the International Association for Dental Research, in Barcelona, Spain, S. Offenbacher will present an abstract titled "Mucosal Gene Expression and Salivary Proteomic Analysis of Candidiasis-Associated Denture-Stomatitis."

The goal of the study was to compare whole-transcriptome, mucosal gene expression in Candida albicans (a parasitic fungus that can infect the mouth) associated chronic denture stomatitis to that of healthy oral mucosa and perform proteomic analyses of potential salivary biomarkers. Denture stomatitis is a condition in which the mucosa underneath a denture becomes inflamed and sometimes painful.

In this study, oral palatal biopsies were obtained from 17 healthy and 15 C. albicans-infected stomatitis subjects for whole-transcriptome analyses using Affymetrix arrays. The presence of C. albicans was confirmed by cytology and cultivable methods and the clinical severity of the stomatitis and denture fit evaluated by the Newton and Kapur Classifications.

A false discovery rate (FDR) of <0.05 was chosen and expression pathways associated with stomatitis were identified using Ingenuity Pathway Analysis.

Saliva was analyzed by two-dimensional liquid chromatography and tandem mass spectrometry for proteomic identification of salivary proteins associated with oral Candidiasis.

Microarray analysis of mRNA expression revealed 3034 genes-in-play differentially expressed in C. albicans stomatitis. 235 genes were upregulated >2-fold including key cytokines [IL1F6, IL1B], chemokines [CXCL1, CCL10, IL8] as well as markers of epithelial suppression and neutrophil recruitment/ activation. Seventy-one genes were down-regulated >2-fold including epithelial adhesion molecules and keratins. Five of the 6 most significant gene ontology pathways involve inflammation and activation of the immune response with CD28 and CTLA signaling
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Contact: Ingrid L. Thomas
ithomas@iadr.org
International & American Association for Dental Research
Source:Eurekalert

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