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Flavonone treatment reverses airway inflammation and remodelling in an asthma murine model
Author(s) -
Toledo AC,
Sakoda CPP,
Perini A,
Pinheiro NM,
Magalhães RM,
Grecco S,
Tibério IFLC,
Câmara NO,
Martins MA,
Lago JHG,
Prado CM
Publication year - 2013
Publication title -
british journal of pharmacology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.432
H-Index - 211
eISSN - 1476-5381
pISSN - 0007-1188
DOI - 10.1111/bph.12062
Subject(s) - ovalbumin , inflammation , immunology , medicine , oxidative stress , asthma , eotaxin , pharmacology , chemokine , immune system
Background and Purpose Asthma is an inflammatory disease that involves airway hyperresponsiveness and remodelling. Flavonoids have been associated to anti‐inflammatory and antioxidant activities and may represent a potential therapeutic treatment of asthma. Our aim was to evaluate the effects of the sakuranetin treatment in several aspects of experimental asthma model in mice. Experimental Approach Male BALB /c mice received ovalbumin (i.p.) on days 0 and 14, and were challenged with aerolized ovalbumin 1% on days 24, 26 and 28. Ovalbumin‐sensitized animals received vehicle (saline and dimethyl sulfoxide, DMSO ), sakuranetin (20 mg kg –1 per mice) or dexamethasone (5 mg kg –1 per mice) daily beginning from 24th to 29th day. Control group received saline inhalation and nasal drop vehicle. On day 29, we determined the airway hyperresponsiveness, inflammation and remodelling as well as specific IgE antibody. RANTES , IL ‐5, IL ‐4, Eotaxin, IL ‐10, TNF ‐α, IFN ‐γ and GMC‐SF content in lung homogenate was performed by Bioplex assay, and 8‐isoprostane and NF ‐ kB activations were visualized in inflammatory cells by immunohistochemistry. Key Results We have demonstrated that sakuranetin treatment attenuated airway hyperresponsiveness, inflammation and remodelling; and these effects could be attributed to Th2 pro‐inflammatory cytokines and oxidative stress reduction as well as control of NF ‐ kB activation. Conclusions and Implications These results highlighted the importance of counteracting oxidative stress by flavonoids in this asthma model and suggest sakuranetin as a potential candidate for studies of treatment of asthma.