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Article Open Access

Dexmedetomidine improves cardiac function and protects against maladaptive remodeling following myocardial infarction

  • Authors:
    • Hui Han
    • Daopeng Dai
    • Jinquan Hu
    • Jinzhou Zhu
    • Lin Lu
    • Guorong Tao
    • Ruiyan Zhang
  • View Affiliations / Copyright

    Affiliations: Department of Cardiology, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, P.R. China, Department of Orthopedics, Changzheng Hospital Affiliated with Second Military Medical University, Shanghai 200003, P.R. China, Department of Anesthesiology, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, P.R. China
    Copyright: © Han et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 5183-5189
    |
    Published online on: October 29, 2019
       https://doi.org/10.3892/mmr.2019.10774
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Abstract

Dexmedetomidine (DEX), a highly specific and selective α2 adrenergic receptor agonist, has been demonstrated to possess potential cardioprotective effects. However, the mechanisms underlying this process remain to be fully illuminated. In the present study, a myocardial infarction (MI) animal model was generated by permanently ligating the left anterior descending coronary artery in mice. Cardiac function and collagen content were evaluated by transthoracic echocardiography and picrosirius red staining, respectively. Apoptosis was determined by the relative expression levels of Bax and Bcl‑2 and the myocardial caspase‑3 activity. Additionally, nicotinamide adenine dinucleotide phosphate oxidase (NOX)‑derived oxidative stress was evaluated by the relative expression of Nox2 and Nox4, along with the myocardial contents of malondialdehyde (MDA) and superoxide dismutase (SOD) activity. It was demonstrated that intraperitoneal DEX treatment (20 µg/kg/day) improved the systolic function of the left ventricle, and decreased the fibrotic changes in post‑myocardial infarction mice, which was paralleled by a decrease in the levels of apoptosis. Subsequent experiments indicated that the restoration of redox signaling was achieved by DEX administration, and the over‑activation of NOXs, including Nox2 and Nox4, was markedly inhibited. In conclusion, this present study suggested that DEX was cardioprotective and limited the excess production of NOX‑derived ROS in ischemic heart disease, implying that DEX is a promising novel drug, especially for patients who have suffered MI.
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Copy and paste a formatted citation
Spandidos Publications style
Han H, Dai D, Hu J, Zhu J, Lu L, Tao G and Zhang R: Dexmedetomidine improves cardiac function and protects against maladaptive remodeling following myocardial infarction. Mol Med Rep 20: 5183-5189, 2019.
APA
Han, H., Dai, D., Hu, J., Zhu, J., Lu, L., Tao, G., & Zhang, R. (2019). Dexmedetomidine improves cardiac function and protects against maladaptive remodeling following myocardial infarction. Molecular Medicine Reports, 20, 5183-5189. https://doi.org/10.3892/mmr.2019.10774
MLA
Han, H., Dai, D., Hu, J., Zhu, J., Lu, L., Tao, G., Zhang, R."Dexmedetomidine improves cardiac function and protects against maladaptive remodeling following myocardial infarction". Molecular Medicine Reports 20.6 (2019): 5183-5189.
Chicago
Han, H., Dai, D., Hu, J., Zhu, J., Lu, L., Tao, G., Zhang, R."Dexmedetomidine improves cardiac function and protects against maladaptive remodeling following myocardial infarction". Molecular Medicine Reports 20, no. 6 (2019): 5183-5189. https://doi.org/10.3892/mmr.2019.10774
Copy and paste a formatted citation
x
Spandidos Publications style
Han H, Dai D, Hu J, Zhu J, Lu L, Tao G and Zhang R: Dexmedetomidine improves cardiac function and protects against maladaptive remodeling following myocardial infarction. Mol Med Rep 20: 5183-5189, 2019.
APA
Han, H., Dai, D., Hu, J., Zhu, J., Lu, L., Tao, G., & Zhang, R. (2019). Dexmedetomidine improves cardiac function and protects against maladaptive remodeling following myocardial infarction. Molecular Medicine Reports, 20, 5183-5189. https://doi.org/10.3892/mmr.2019.10774
MLA
Han, H., Dai, D., Hu, J., Zhu, J., Lu, L., Tao, G., Zhang, R."Dexmedetomidine improves cardiac function and protects against maladaptive remodeling following myocardial infarction". Molecular Medicine Reports 20.6 (2019): 5183-5189.
Chicago
Han, H., Dai, D., Hu, J., Zhu, J., Lu, L., Tao, G., Zhang, R."Dexmedetomidine improves cardiac function and protects against maladaptive remodeling following myocardial infarction". Molecular Medicine Reports 20, no. 6 (2019): 5183-5189. https://doi.org/10.3892/mmr.2019.10774
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