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BioMed Research International
Volume 2016 (2016), Article ID 3652068, 7 pages
http://dx.doi.org/10.1155/2016/3652068
Research Article

Increased Activity of the Intracardiac Oxytocinergic System in the Development of Postinfarction Heart Failure

1Department of Experimental and Clinical Physiology, Laboratory of Centre for Preclinical Sciences, Medical University of Warsaw, Warsaw, Poland
2Department of Cardiology, Hypertension, and Internal Medicine, 2nd Medical Faculty, Medical University of Warsaw, Warsaw, Poland
3Department of Immunology, Transplantology and Internal Diseases, Transplantation Institute, Medical University of Warsaw, Warsaw, Poland

Received 15 July 2016; Revised 8 October 2016; Accepted 18 October 2016

Academic Editor: Ji-Fu Wei

Copyright © 2016 Agnieszka Wsol et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Aim. The present study was designed to test the hypothesis that the development of postinfarction heart failure is associated with a change of activity of the intracardiac oxytocinergic system. Methods. Experiments were performed on male Sprague-Dawley rats subjected to myocardial infarction or sham surgery. Four weeks after the surgery, blood samples were collected and the samples of the left ventricle (LV) and right ventricle (RV) were harvested for evaluation of the mRNA expression (RT-PCR) of oxytocin (OT), oxytocin receptor (OTR), natriuretic peptides, and the level of OT and OTR protein (ELISA). The concentration of N-terminal B-type natriuretic peptide was measured to determine the presence of heart failure. Results. Plasma NT-proBNP concentration was higher in the infarcted rats. In the infarcted rats, the expression of OT mRNA and the OT protein level were higher in the RV. There were no significant differences between infarcted and noninfarcted rats in the expression of OT mRNA and in the OT protein level in the fragments of the LV. In both the left and the right ventricles, OTR mRNA expression was lower but the level of OTR protein was higher in the infarcted rats. Conclusions. In the present study, we indicate that postinfarction heart failure is associated with an increased activity of the intracardiac oxytocinergic system.