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• W2000729448 abstract "Reactive oxygen species produced during allergic inflammation are key players of the pathophysiology of asthma, leading to oxidative tissue injury and inactivation of endogenous manganese superoxide dismutase (MnSOD). On this ground, removal of excess superoxide anion by scavenger molecules would be beneficial and protective. Here we show that a novel manganese(II)-containing polyamine-polycarboxylic compound, termed MnII(Me2DO2A), with potent superoxide dismuting properties decreases the respiratory and histopathological lung abnormalities due to allergen inhalation in a model of ovalbumin (OA)-induced allergic asthma-like reaction in sensitized guinea pigs. Severe respiratory dysfunction in response to OA aerosolic challenge arose rapidly in the sensitized animals and was accompanied by bronchoconstriction, alveolar hyperinflation, mast cell activation, increased leukocyte infiltration (evaluated by myeloperoxidase assay), oxidative lung tissue injury (evaluated by the thiobarbituric-acid-reactive substances and nitrotyrosine immunostaining), decay of endogenous MnSOD activity, production of pro-inflammatory prostaglandins, and lung cell apoptosis. Treatment with MnII(Me2DO2A) (15 mg/kg, given 1 h before allergen challenge), but not the inactive congener ZnII(Me2DO2A) lacking redox-active metal site, significantly attenuated all the above functional, histopathological and biochemical parameters of allergic inflammation and restored the levels of MnSOD activity. In conclusion, our findings support the potential therapeutic use of MnII(Me2DO2A) as novel superoxide scavenger drug in asthma and anaphylactic reactions." @default.
• W2000729448 created "2016-06-24" @default.
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• W2000729448 date "2010-06-01" @default.
• W2000729448 modified "2023-10-05" @default.
• W2000729448 title "Suppression of allergen-induced respiratory dysfunction and airway inflammation in sensitized guinea pigs by MnII(Me2DO2A), a novel superoxide scavenger compound" @default.
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• W2000729448 doi "https://doi.org/10.1016/j.freeradbiomed.2010.02.041" @default.
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