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Analysis on mechanism of ATP-sensitive K+ channel opener natakalim improving congestive heart failure after myocardial infarction

  • Authors:
    • Feng Jin
  • View Affiliations / Copyright

    Affiliations: Department of Vasculocardiology, Xiangyang No. 1 People's Hospital, Xiangyang, Hubei 441000, P.R. China
    Copyright: © Jin et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 3993-3997
    |
    Published online on: November 1, 2016
       https://doi.org/10.3892/etm.2016.3853
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Abstract

The action mechanism of natakalim, a novel ATP-sensitive potassium channel opener, was studied in ameliorating the congestive heart failure (CHF) after myocardial infarction. A total of 25 healthy Wistar male rats (age, 10 weeks; average weight, 300 g) were selected, and the CHF models after acute myocardial infarction (AMI) were prepared by ligation of left anterior descending branch. They were randomly divided into the sham operation group, the model group and the groups of 1, 3 and 9 mg/kg/day natakalims. Each group had 5 mice that were sacrificed after 8 weeks. We compared left ventricular end-diastolic diameter (LVEDD), left ventricular ejection fraction (LVEF), N-terminal prohormone of brain natriuretic peptide (NT-proBNP), left ventricular mass index, myocardial cell cross-sectional area, myocardial collagen content, plasma endothelin-1 (ET-1) and endothelial nitric oxide synthase (eNOS) levels. Compared with the sham operation, the LVEDD and NT-proBNP in the model group and each natakalim group were elevated. LVEF decreased significantly, while the left ventricular mass index, myocardial cell cross‑sectional area, myocardial collagen content, plasma ET-1 and eNOS levels increased. Natakalim intervention improved the above changes and the improvement effect of 3 mg/kg/day group was the highest. The mechanism of natakalim against the endothelin system can be explained by the fact that inhibiting ET-1 synthesis can reduce the ET-1 levels in circulation leading to the release of NO and PGI2. Inhibition of the vasoconstriction effect of ET-1 can improve the hemodynamics of high-load status and ameliorate the cardiac systolic and diastolic functions. In conclusion, natakalim can improve the ventricular remodeling of CHF after AMI, and 3 mg/kg/day was the most effective dose.
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Copy and paste a formatted citation
Spandidos Publications style
Jin F: Analysis on mechanism of ATP-sensitive K+ channel opener natakalim improving congestive heart failure after myocardial infarction. Exp Ther Med 12: 3993-3997, 2016.
APA
Jin, F. (2016). Analysis on mechanism of ATP-sensitive K+ channel opener natakalim improving congestive heart failure after myocardial infarction. Experimental and Therapeutic Medicine, 12, 3993-3997. https://doi.org/10.3892/etm.2016.3853
MLA
Jin, F."Analysis on mechanism of ATP-sensitive K+ channel opener natakalim improving congestive heart failure after myocardial infarction". Experimental and Therapeutic Medicine 12.6 (2016): 3993-3997.
Chicago
Jin, F."Analysis on mechanism of ATP-sensitive K+ channel opener natakalim improving congestive heart failure after myocardial infarction". Experimental and Therapeutic Medicine 12, no. 6 (2016): 3993-3997. https://doi.org/10.3892/etm.2016.3853
Copy and paste a formatted citation
x
Spandidos Publications style
Jin F: Analysis on mechanism of ATP-sensitive K+ channel opener natakalim improving congestive heart failure after myocardial infarction. Exp Ther Med 12: 3993-3997, 2016.
APA
Jin, F. (2016). Analysis on mechanism of ATP-sensitive K+ channel opener natakalim improving congestive heart failure after myocardial infarction. Experimental and Therapeutic Medicine, 12, 3993-3997. https://doi.org/10.3892/etm.2016.3853
MLA
Jin, F."Analysis on mechanism of ATP-sensitive K+ channel opener natakalim improving congestive heart failure after myocardial infarction". Experimental and Therapeutic Medicine 12.6 (2016): 3993-3997.
Chicago
Jin, F."Analysis on mechanism of ATP-sensitive K+ channel opener natakalim improving congestive heart failure after myocardial infarction". Experimental and Therapeutic Medicine 12, no. 6 (2016): 3993-3997. https://doi.org/10.3892/etm.2016.3853
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