title: Inhibition of airway inflammation and remodeling by sitagliptin in murine chronic asthma.
abstract: In this study the role of sitagliptin, dipeptidyl peptidase inhibitor, DPP-4, and dexamethasone in ameliorating inflammation and remodeling of chronic asthma in a mouse model were investigated. Mice sensitized to ovalbumin were chronically challenged with aerosolized antigen for 3days a week continued for 8weeks. During this period animals were treated with sitagliptin or dexamethasone daily. Assessment of inflammatory cell, oxidative markers, total nitrate/nitrite (NOx), interleukin (IL)-13, transforming growth factor-beta1 (TGF-β1) in bronchoalveolar lavage (BAL) and/or lung tissue were done. Also histopathological and immuno-histochemical analysis for lung was carried out. Compared with vehicle alone, treatment with sitagliptin or dexamethasone significantly reduced accumulation of eosinophils and chronic inflammatory cells, subepithelial collagenization, and thickening of the airway epithelium. Also both drug reduced goblet cell hyperplasia, oxidative stress, TGF-β1, IL-13 and epithelial cytoplasmic immunoreactivity for nuclear factor κ-B (NFκ-B). These data indicate that sitagliptin like dexamethasone may play a beneficial role reducing airway inflammation and remodeling in chronic murine model of asthma.
authors.affiliation: Department of Pharmacology and Toxicology, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt; College of Pharmacy, Taibah University, El-Madinah El-Munawarah, Saudi Arabia. Electronic address: manarahna@yahoo.com.
authors.forename: Manar A
authors.initials: MA
authors.lastname: Nader
mesh_terms: D056151:Airway Remodeling / Q000187:drug effects*; D000818:Animals; D018927:Anti-Asthmatic Agents / Q000627:therapeutic use*; D000893:Anti-Inflammatory Agents / Q000627:therapeutic use; D001249:Asthma / Q000188:drug therapy*; D001992:Bronchoalveolar Lavage Fluid / Q000166:cytology; D002908:Chronic Disease; D016207:Cytokines / Q000096:biosynthesis; D003907:Dexamethasone / Q000627:therapeutic use; D005260:Female; D020397:Goblet Cells / Q000473:pathology; D007249:Inflammation / Q000188:drug therapy* / Q000473:pathology*; D051379:Mice; D008807:Mice, Inbred BALB C; D010047:Ovalbumin; D018384:Oxidative Stress / Q000187:drug effects; D012140:Respiratory Tract Diseases / Q000188:drug therapy* / Q000473:pathology*; D000068900:Sitagliptin Phosphate / Q000627:therapeutic use*
chemical_list: D018927:Anti-Asthmatic Agents; D000893:Anti-Inflammatory Agents; D016207:Cytokines; D003907:Dexamethasone; D010047:Ovalbumin; D000068900:Sitagliptin Phosphate
keywords: Airway inflammation; Airway remodeling; Chronic asthma; IL-13; Mice; NFκ-B; TGF-β1