title: Uvaol attenuates pleuritis and eosinophilic inflammation in ovalbumin-induced allergy in mice.
abstract: Uvaol, a triterpene present in olives and virgin olive oil, has been shown to possess anti-inflammatory properties and antioxidant effects. However, until now, no studies have demonstrated its potential effects on allergic inflammation. The aim of this study was to evaluate the anti-inflammatory effects of uvaol in a mouse model of allergy characterized by eosinophil-dominant inflammation in actively sensitized mice. The anti-inflammatory effect of uvaol was analyzed in two murine models of allergic inflammation (pleurisy and asthma). In these models, Swiss mice were sensitized and challenged with ovalbumin (OVA). In the pleurisy model, the pleural eosinophilic inflammation and IL-5 concentrations were examined 24h after the OVA challenge, while in the asthma model were examined the airway inflammation via bronchoalveolar lavage (BAL) fluid cytology and lung histopathology analyses. Our results showed that uvaol decreased the accumulation of eosinophils and the concentration of IL-5 in pleural effluent. Uvaol also demonstrated important anti-inflammatory activity by inhibiting production of IL-5 and influx of leukocytes, mainly of eosinophils, in BAL fluid, but without interfering with levels of reactive oxygen species in leukocytes. Moreover, the eosinophil infiltration, mucus production, number of alveoli that collapsed, and IL-5 levels in the lung were clearly decreased by uvaol treatment. These findings indicate that uvaol can be a good candidate for the treatment of allergic inflammation by inhibiting eosinophil influx and IL-5 production in ovalbumin-induced allergy.
authors.affiliation: Laboratory of Cell Biology, Federal University of Alagoas, Maceió, AL, Brazil; Laboratory of Inflammation, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
authors.forename: Lais Costa
authors.initials: LC
authors.lastname: Agra
authors.affiliation: Laboratory of Cell Biology, Federal University of Alagoas, Maceió, AL, Brazil.
authors.forename: Marvin Paulo
authors.initials: MP
authors.lastname: Lins
authors.affiliation: Laboratory of Inflammation, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
authors.forename: Patrícia
authors.initials: P
authors.lastname: da Silva Marques
authors.affiliation: Laboratory of Cell Biology, Federal University of Alagoas, Maceió, AL, Brazil.
authors.forename: Salete
authors.initials: S
authors.lastname: Smaniotto
authors.affiliation: Laboratory of Inflammation, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
authors.forename: Christianne
authors.initials: C
authors.lastname: Bandeira de Melo
authors.affiliation: UMR991-INSERM, University of Rennes 1, Rennes, France.
authors.forename: Vincent
authors.initials: V
authors.lastname: Lagente
authors.affiliation: Laboratory of Cell Biology, Federal University of Alagoas, Maceió, AL, Brazil. Electronic address: emilianobarreto@icbs.ufal.br.
authors.forename: Emiliano
authors.initials: E
authors.lastname: Barreto
mesh_terms: D000485:Allergens / Q000276:immunology; D000818:Animals; D004804:Eosinophils / Q000187:drug effects* / Q000276:immunology; D006967:Hypersensitivity / Q000150:complications* / Q000188:drug therapy / Q000276:immunology*; D007249:Inflammation / Q000276:immunology; D008168:Lung / Q000187:drug effects / Q000276:immunology / Q000473:pathology; D008297:Male; D051379:Mice; D010047:Ovalbumin / Q000276:immunology*; D010998:Pleurisy / Q000150:complications / Q000188:drug therapy*; D014315:Triterpenes / Q000494:pharmacology* / Q000627:therapeutic use
chemical_list: D000485:Allergens; D014315:Triterpenes; D010047:Ovalbumin; C013330:uvaol
keywords: Eosinophil; IL-5; Inflammation; Triterpene; Uvaol; Uvaol (PubChem CID: 92802)