VOPROSY MEDITSINSKOI KHIMII (ISSN 0042-8809)

Effect of experimental myocardial infarct on the succinate oxidation rate and succinate dehydrogenase activity in the heart mitochondria

   
Dzheia P.P., Toleĭkis A.I., Prashkiavichius A.K.
PubMed Id: 7423870
Year: 1980  Volume: 26  Issue: 5  Pages: 591-594
The rate of oxidation of NADH and 3-hydroxybutyrate was studied in heart mitochondria after short-term (60 min) occlusion of coronary artery and the subsequent reperfusion. Addition of NAD increased the rate of 3-hydroxybutyrate oxidation, lowered in mitochondria of impaired tissue, but no complete restoration occurred. The 3-hydroxybutyrate dehydrogenase activity was decreased by 25%. The rate of NADH oxidation in ultrasonicated mitochondria from the infarction zone exceeded 2-fold the rate of 3-hydroxybutyrate oxidation. These data suggest that deficiency of NAD limited primarily the rate of 3-hydroxybutyrate oxidation in heart mitochondria under conditions of experimental myocardial infarction. The level of 3-hydroxybutyrate dehydrogenase activity appears to restrict the rate of 3-hydroxybutyrate oxidation after addition of NAD.
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Dzheia, P. P., Toleĭkis, A. I., Prashkiavichius, A. K. (1980). Effect of experimental myocardial infarct on the succinate oxidation rate and succinate dehydrogenase activity in the heart mitochondria. Voprosy Meditsinskoi Khimii, 26(5), 591-594.
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