Change in opioid peptide level in the heart and blood plasma during acute myocardial ischaemia complicated by ventricular fibrillation

Clinical and Experimental Pharmacology & Physiology
L N Maslov, Y B Lishmanov

Abstract

1. The influence of acute myocardial ischaemia (AMI) complicated by ventricular fibrillation (VF) on opioid peptide level in myocardium and blood plasma of rats has been studied. 2. Leu-enkephalin level in myocardium of rats with AMI and VF has been found to be significantly lower than in animals with AMI but without VF. 3. Met-enkephalin level has been found to be significantly increased in both animals with VF and without it. We have not found a significant difference in met-enkephalin level in myocardium of animals with VF and without it. 4. AMI was induced to increase the enkephalin and beta-endorphin level in blood plasma of all the animals, whether VF had occurred or not. 5. Preliminary administration of D-Ala2,Leu5,Arg6-enkephalin, a synthetic analogue of leu-enkephalin, has prevented a decrease of ventricular fibrillation threshold in experimental coronary occlusion. 6. The obtained results allow us to conclude that enkephalins of myocardium but not opioid peptides of blood plasma play an important role in VF occurrence.

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Citations

Nov 21, 2007·Bulletin of Experimental Biology and Medicine·T V LasukovaYu B Lishmanov
Sep 1, 2005·Journal of Biomedical Science·Wei-Luen ChangMing-Jai Su
Jun 24, 2003·Journal of Molecular and Cellular Cardiology·Garrett J Gross
Apr 24, 2001·Pharmacology & Therapeutics·J E Schultz, G J Gross
Jan 1, 1996·Peptides·G A OlsonA J Kastin
Jan 5, 2005·British Journal of Plastic Surgery·S KiumehrA R Dehpour
Oct 30, 2008·Izvestiia Akademii nauk. Seriia biologicheskaia·T V LasukovaIu B Lishmanov
May 7, 2013·American Journal of Physiology. Heart and Circulatory Physiology·Liang-Wu Fu, John C Longhurst
Dec 22, 1999·The American Journal of Physiology·Y TakasakiD M van Winkle

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