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  • Title: [Parameters of NO synthase system of gastric mucosa in rats under stress conditions and inhibition of cyclooxygenase].
    Author: Fomenko IS, Bondarchuk TI, Bilets'ka LP, Panasiuk NB, Skliarov OIa.
    Journal: Fiziol Zh (1994); 2014; 60(2):51-6. PubMed ID: 25007521.
    Abstract:
    In experiments on rats with modeled water-restrained stress, the influence of nonsteroidal anti-inflammatory drugs of different genesis on morphological status of gastric mucosa and changes of NO-synthase system parameters have been studied Administration of nonselective cyclooxygenese inhibitor naproxen in the water-restrained stress model in rats potentiated the increase of severity of damage of gastric mucosa. At the same time, the activity of both inducible and constitutive isoforms ofNO-sythase decreased. The parameters of lipoperoxidation remained at the level observed during water-restrained stress. It was shown the advantages of the use of H2S-releasinfg nonsteroidal anti-inflammatory drug ATB-346, which are associated with its cytoprotective effect of the drug manifested by a decreased total area of gastric damage. However, parameters of lipoperoxidation and NO-syntase system did not differ substantially from those in the group treated with napoxen, indicating the prevalence of parent molecule (naproxen) in regulation of function of NO-system Administration of dual COX/LOX inhibitor, the compound 2A5DHT, caused a decrease of gastric damage as compared to the effect ofnaproxen. The activity of iNOS remained much higher than under condition of the naproxen action.
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