Open Access

Enalapril protects against myocardial ischemia/reperfusion injury in a swine model of cardiac arrest and resuscitation

  • Authors:
    • Guoxing Wang
    • Qian Zhang
    • Wei Yuan
    • Junyuan Wu
    • Chunsheng Li
  • View Affiliations

  • Published online on: September 15, 2016     https://doi.org/10.3892/ijmm.2016.2737
  • Pages: 1463-1473
  • Copyright: © Wang et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

There is strong evidence to suggest that angiotensin-converting enzyme inhibitors (ACEIs) protect against local myocardial ischemia/reperfusion (I/R) injury. This study was designed to explore whether ACEIs exert cardioprotective effects in a swine model of cardiac arrest (CA) and resuscitation. Male pigs were randomly assigned to three groups: sham‑operated group, saline treatment group and enalapril treatment group. Thirty minutes after drug infusion, the animals in the saline and enalapril groups were subjected to ventricular fibrillation (8 min) followed by cardiopulmonary resuscitation (up to 30 min). Cardiac function was monitored, and myocardial tissue and blood were collected for analysis. Enalapril pre‑treatment did not improve cardiac function or the 6-h survival rate after CA and resuscitation; however, this intervention ameliorated myocardial ultrastructural damage, reduced the level of plasma cardiac troponin I and decreased myocardial apoptosis. Plasma angiotensin (Ang) II and Ang‑(1‑7) levels were enhanced in the model of CA and resuscitation. Enalapril reduced the plasma Ang II level at 4 and 6 h after the return of spontaneous circulation whereas enalapril did not affect the plasma Ang‑(1‑7) level. Enalapril pre-treatment decreased the myocardial mRNA and protein expression of angiotensin-converting enzyme (ACE). Enalapril treatment also reduced the myocardial ACE/ACE2 ratio, both at the mRNA and the protein level. Enalapril pre‑treatment did not affect the upregulation of ACE2, Ang II type 1 receptor (AT1R) and MAS after CA and resuscitation. Taken together, these findings suggest that enalapril protects against ischemic injury through the attenuation of the ACE/Ang II/AT1R axis after CA and resuscitation in pigs. These results suggest the potential therapeutic value of ACEIs in patients with CA.
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November-2016
Volume 38 Issue 5

Print ISSN: 1107-3756
Online ISSN:1791-244X

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Copy and paste a formatted citation
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Spandidos Publications style
Wang G, Zhang Q, Yuan W, Wu J and Li C: Enalapril protects against myocardial ischemia/reperfusion injury in a swine model of cardiac arrest and resuscitation. Int J Mol Med 38: 1463-1473, 2016.
APA
Wang, G., Zhang, Q., Yuan, W., Wu, J., & Li, C. (2016). Enalapril protects against myocardial ischemia/reperfusion injury in a swine model of cardiac arrest and resuscitation. International Journal of Molecular Medicine, 38, 1463-1473. https://doi.org/10.3892/ijmm.2016.2737
MLA
Wang, G., Zhang, Q., Yuan, W., Wu, J., Li, C."Enalapril protects against myocardial ischemia/reperfusion injury in a swine model of cardiac arrest and resuscitation". International Journal of Molecular Medicine 38.5 (2016): 1463-1473.
Chicago
Wang, G., Zhang, Q., Yuan, W., Wu, J., Li, C."Enalapril protects against myocardial ischemia/reperfusion injury in a swine model of cardiac arrest and resuscitation". International Journal of Molecular Medicine 38, no. 5 (2016): 1463-1473. https://doi.org/10.3892/ijmm.2016.2737