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Changes in antioxidant status of myocardium during oxidative stress under the influence of coenzyme Q10.
Biochemistry (Mosc). 2005 Jan; 70(1):79-84.B

Abstract

Changes in myocardium were studied during oxidative stress induced by infusion of hydrogen peroxide in the coronary vessels of isolated rat heart. Moderate concentrations of H2O2 increased the heart rate but decreased the contractile force, whereas higher concentrations of H2O2 decreased both parameters and increased the end diastolic pressure. The effect of H2O2 was stable, cumulative, and was associated with disturbance in respiration of mitochondria, increased production of ROS in them, and decrease in activities of antioxidant enzymes in the myocardium. Changes in the antioxidant status of the myocardium induced by long-term addition of coenzyme Q(10) into food was accompanied by decrease in the negative inotropic effect of H2O2, whereas the levels of superoxide dismutase and glutathione peroxidase after oxidative stress were virtually unchanged. The activities of these enzymes displayed a high positive correlation with the cardiac function. The findings suggest that coenzyme Q(10) should increase resistance of the myocardium to oxidative stress not only by a direct antioxidant mechanism but also indirectly, due to increased protection of antioxidant enzymes.

Authors+Show Affiliations

Russian Research and Productive Cardiology Complex, Ministry of Health of Russian Federation, Moscow 121552, Russia. v.lakomkin@cardio.ruNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

15701052

Citation

Lakomkin, V L., et al. "Changes in Antioxidant Status of Myocardium During Oxidative Stress Under the Influence of Coenzyme Q10." Biochemistry. Biokhimiia, vol. 70, no. 1, 2005, pp. 79-84.
Lakomkin VL, Konovalova GG, Kalenikova EI, et al. Changes in antioxidant status of myocardium during oxidative stress under the influence of coenzyme Q10. Biochemistry (Mosc). 2005;70(1):79-84.
Lakomkin, V. L., Konovalova, G. G., Kalenikova, E. I., Zabbarova, I. V., Kaminnyi, A. I., Tikhaze, A. K., Lankin, V. Z., Ruuge, E. K., & Kapelko, V. I. (2005). Changes in antioxidant status of myocardium during oxidative stress under the influence of coenzyme Q10. Biochemistry. Biokhimiia, 70(1), 79-84.
Lakomkin VL, et al. Changes in Antioxidant Status of Myocardium During Oxidative Stress Under the Influence of Coenzyme Q10. Biochemistry (Mosc). 2005;70(1):79-84. PubMed PMID: 15701052.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Changes in antioxidant status of myocardium during oxidative stress under the influence of coenzyme Q10. AU - Lakomkin,V L, AU - Konovalova,G G, AU - Kalenikova,E I, AU - Zabbarova,I V, AU - Kaminnyi,A I, AU - Tikhaze,A K, AU - Lankin,V Z, AU - Ruuge,E K, AU - Kapelko,V I, PY - 2005/2/11/pubmed PY - 2005/7/13/medline PY - 2005/2/11/entrez SP - 79 EP - 84 JF - Biochemistry. Biokhimiia JO - Biochemistry (Mosc) VL - 70 IS - 1 N2 - Changes in myocardium were studied during oxidative stress induced by infusion of hydrogen peroxide in the coronary vessels of isolated rat heart. Moderate concentrations of H2O2 increased the heart rate but decreased the contractile force, whereas higher concentrations of H2O2 decreased both parameters and increased the end diastolic pressure. The effect of H2O2 was stable, cumulative, and was associated with disturbance in respiration of mitochondria, increased production of ROS in them, and decrease in activities of antioxidant enzymes in the myocardium. Changes in the antioxidant status of the myocardium induced by long-term addition of coenzyme Q(10) into food was accompanied by decrease in the negative inotropic effect of H2O2, whereas the levels of superoxide dismutase and glutathione peroxidase after oxidative stress were virtually unchanged. The activities of these enzymes displayed a high positive correlation with the cardiac function. The findings suggest that coenzyme Q(10) should increase resistance of the myocardium to oxidative stress not only by a direct antioxidant mechanism but also indirectly, due to increased protection of antioxidant enzymes. SN - 0006-2979 UR - https://www.unboundmedicine.com/medline/citation/15701052/Changes_in_antioxidant_status_of_myocardium_during_oxidative_stress_under_the_influence_of_coenzyme_Q10_ L2 - http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=15701052.ui DB - PRIME DP - Unbound Medicine ER -