The role of iNOS inhibition in the mechanism of the cardioprotective effect of new GABA and glutamic acid derivatives in the model of acute alcoholic myocardial injury in rats
The cardioprotective effects of new derivatives of glutamic acid (glufimet) and GABA (mefargin) were studied in rats exposed to acute alcohol intoxication (AAI) under conditions of selective blockade of inducible NO-synthase (iNOS). AAI induced a pronounced decrease in the contractile function of the myocardium during exercise tests (load by volume, test for adrenoreactivity, isometric exercise), caused mitochondrial dysfunction and increased processes of lipid peroxidation (LPO) in heart cells. A decrease in NO production during iNOS inhibition and AAI improved the respiratory function of mitochondria, a decreased the level of LPO products, and increased mitochondrial superoxide dismutase activity of heart cells. This led to an increase in myocardial contractility. The studied compounds, glufimet and mefargin, caused a statistically significant increase in the rates of myocardial contraction and relaxation, left ventricular pressure, and also reduced NO production. This was accompanied by a decrease in the intensity of LPO processes and an increase in the respiratory control ratio (RCR), reflecting the coupling between respiration and phosphorylation processes during activation of the respiratory chain complexes I and II. The decrease in NO concentration during selective blockade of iNOS and administration of the studied substances was less pronounced than without blockade of the enzyme. This suggests the putative effect of new derivatives of neuroactive amino acids on the NO system.
Kustova M.V., Prokofiev I.I., Perfilova V.N., Muzyko E.A., Zavadskaya V.E., Varlamova S.V., Kucheryavenko A.S., Tyurenkov I.N., Vasilyeva O.S. (2023) The role of iNOS inhibition in the mechanism of the cardioprotective effect of new GABA and glutamic acid derivatives in the model of acute alcoholic myocardial injury in rats. Biomeditsinskaya Khimiya, 69(2), 112-124.
Kustova M.V. et al. The role of iNOS inhibition in the mechanism of the cardioprotective effect of new GABA and glutamic acid derivatives in the model of acute alcoholic myocardial injury in rats // Biomeditsinskaya Khimiya. - 2023. - V. 69. -N 2. - P. 112-124.
Kustova M.V. et al., "The role of iNOS inhibition in the mechanism of the cardioprotective effect of new GABA and glutamic acid derivatives in the model of acute alcoholic myocardial injury in rats." Biomeditsinskaya Khimiya 69.2 (2023): 112-124.
Kustova, M. V., Prokofiev, I. I., Perfilova, V. N., Muzyko, E. A., Zavadskaya, V. E., Varlamova, S. V., Kucheryavenko, A. S., Tyurenkov, I. N., Vasilyeva, O. S. (2023). The role of iNOS inhibition in the mechanism of the cardioprotective effect of new GABA and glutamic acid derivatives in the model of acute alcoholic myocardial injury in rats. Biomeditsinskaya Khimiya, 69(2), 112-124.
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