title: PPAR signaling pathway and cancer-related proteins are involved in celiac disease-associated tissue damage.
abstract: Celiac disease (CD) is an immune-mediated disorder triggered by the ingestion of wheat gliadin and related proteins in genetically predisposed individuals. To find a proteomic CD diagnostic signature and to gain a better understanding of pathogenetic mechanisms associated with CD, we analyzed the intestinal mucosa proteome alterations using two dimensional difference gel electrophoresis (2D-DIGE) coupled with matrix assisted laser desorption ionization time of flight mass spectrometry (MALDI-TOF ms) of CD patients with varying degrees of histological abnormalities defined by Marsh criteria and controls. Our results clearly evidenced the presence of two groups of patients: Group A, including controls and Marsh 0-I CD patients; and Group B, consisting of CD subjects with grade II-III Oberhuber-Marsh classification. Differentially expressed proteins were involved mainly in lipid, protein and sugar metabolism. Interestingly, in Group B, several downregulated proteins (FABP1, FABP2, APOC3, HMGCS2, ACADM and PEPCK) were implicated directly in the peroxisome proliferator-activated receptor (PPAR) signaling pathway. Moreover, Group B patients presented a deregulation of some proteins involved in apoptosis/survival pathways: phosphatidylethanolamine-binding protein 1 (PEBP1), Ras-related nuclear protein (Ran) and peroxiredoxin 4 (PRDX4). PEBP1 downregulation and RAN and PRDX4 upregulation were associated with more severe tissue damage. Likewise, IgMs were found strongly upregulated in Group B. In conclusion, our results indicate that a downregulation of proteins involved in PPAR signaling and the modulation of several cancer-related proteins are associated with the highest CD histological score according to Oberhuber-Marsh classification.
authors.affiliation: Experimental and Clinical Pharmacology Unit, CRO Centro diRiferimento Oncologico, IRCCS National Cancer Institute, AVIANO (PN), Italy.
authors.forename: Maria Paola
authors.initials: MP
authors.lastname: Simula
authors.forename: Renato
authors.initials: R
authors.lastname: Cannizzaro
authors.forename: Vincenzo
authors.initials: V
authors.lastname: Canzonieri
authors.forename: Alessandro
authors.initials: A
authors.lastname: Pavan
authors.forename: Stefania
authors.initials: S
authors.lastname: Maiero
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Toffoli
authors.forename: Valli
authors.initials: V
authors.lastname: De Re
mesh_terms: D000293:Adolescent; D000328:Adult; D015415:Biomarkers / Q000378:metabolism; D002446:Celiac Disease / Q000378:metabolism* / Q000473:pathology*; D016000:Cluster Analysis; D015536:Down-Regulation; D004386:Duodenum / Q000378:metabolism / Q000473:pathology; D015180:Electrophoresis, Gel, Two-Dimensional; D005260:Female; D006801:Humans; D015151:Immunoblotting; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D047492:Peroxisome Proliferator-Activated Receptors / Q000378:metabolism*; D025341:Principal Component Analysis; D015203:Reproducibility of Results; D015398:Signal Transduction; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; D015854:Up-Regulation
chemical_list: D015415:Biomarkers; D047492:Peroxisome Proliferator-Activated Receptors
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