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Article Open Access

Time‑dependent and independent effects of thyroid hormone administration following myocardial infarction in rats

  • Authors:
    • Ioanna Iliopoulou
    • Iordanis Mourouzis
    • George I. Lambrou
    • Dimitra Iliopoulou
    • Dimitrios‑Dionysios Koutsouris
    • Constantinos Pantos
  • View Affiliations / Copyright

    Affiliations: Department of Pharmacology, National and Kapodistrian University of Athens, Medical School, 11527 Athens, Greece, Biomedical Engineering Laboratory, Department of Information Transmission Systems and Material Technology, National Technical University of Athens, School of Electrical and Computer Engineering, 15780 Athens, Greece
    Copyright: © Iliopoulou et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 864-876
    |
    Published online on: May 11, 2018
       https://doi.org/10.3892/mmr.2018.9008
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Abstract

Cardiac function is reduced following myocardial infarction (MI) due to myocardial injury and alterations in the viable non‑ischemic myocardium, a process known as cardiac remodeling. The current treatments available for patients with acute MI (AMI) reduce infarct size, preserve left ventricular (LV) function and improve survival; however, these treatments do not prevent remodeling, which can lead to heart failure. The aim of the present study was to investigate the effects of thyroid hormone (TH) treatment following MI in an in vivo rat model. A total of 199 rats were separated into 3 groups: Sham operated and 2 different coronary artery ligation (CAL) groups. Rats subjected to CAL were randomly divided into a further 2 groups 24 h following surgery. The first group received standard rat chow (designated the CAL group), while the second group received food containing 0.05% thyroid powder (designated the CALTH group). The mean daily intake of TH per rat was estimated at 3.0 µg T3 and 12 µg T4. Echocardiography was used to monitor the rats. Large‑scale analysis confirmed the favorable effects of TH treatment following CAL on various parameters of cardiac function. TH treatment reduced LV dilation, and increased global and regional LV function. The development of cardiac hypertrophy was induced and, thus, wall stress was limited. Furthermore, TH treatment improved cardiac geometry, which manifested as an increased sphericity index. Myocardial function, as well as LV dilatation, following CAL and TH treatment was not closely associated with the extent of injury, indicating a novel therapeutic intervention that may alter the course of LV remodeling that typically leads to post‑MI heart failure. Data modelling and regressions may be developed to enable the simulation of the pathophysiological processes that occur following MI, and to predict with accuracy the effects of novel or current treatments that act via the modulation of tissue injury, LV dilation, LV geometry and hypertrophy.
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Copy and paste a formatted citation
Spandidos Publications style
Iliopoulou I, Mourouzis I, Lambrou GI, Iliopoulou D, Koutsouris DD and Pantos C: Time‑dependent and independent effects of thyroid hormone administration following myocardial infarction in rats. Mol Med Rep 18: 864-876, 2018.
APA
Iliopoulou, I., Mourouzis, I., Lambrou, G.I., Iliopoulou, D., Koutsouris, D., & Pantos, C. (2018). Time‑dependent and independent effects of thyroid hormone administration following myocardial infarction in rats. Molecular Medicine Reports, 18, 864-876. https://doi.org/10.3892/mmr.2018.9008
MLA
Iliopoulou, I., Mourouzis, I., Lambrou, G. I., Iliopoulou, D., Koutsouris, D., Pantos, C."Time‑dependent and independent effects of thyroid hormone administration following myocardial infarction in rats". Molecular Medicine Reports 18.1 (2018): 864-876.
Chicago
Iliopoulou, I., Mourouzis, I., Lambrou, G. I., Iliopoulou, D., Koutsouris, D., Pantos, C."Time‑dependent and independent effects of thyroid hormone administration following myocardial infarction in rats". Molecular Medicine Reports 18, no. 1 (2018): 864-876. https://doi.org/10.3892/mmr.2018.9008
Copy and paste a formatted citation
x
Spandidos Publications style
Iliopoulou I, Mourouzis I, Lambrou GI, Iliopoulou D, Koutsouris DD and Pantos C: Time‑dependent and independent effects of thyroid hormone administration following myocardial infarction in rats. Mol Med Rep 18: 864-876, 2018.
APA
Iliopoulou, I., Mourouzis, I., Lambrou, G.I., Iliopoulou, D., Koutsouris, D., & Pantos, C. (2018). Time‑dependent and independent effects of thyroid hormone administration following myocardial infarction in rats. Molecular Medicine Reports, 18, 864-876. https://doi.org/10.3892/mmr.2018.9008
MLA
Iliopoulou, I., Mourouzis, I., Lambrou, G. I., Iliopoulou, D., Koutsouris, D., Pantos, C."Time‑dependent and independent effects of thyroid hormone administration following myocardial infarction in rats". Molecular Medicine Reports 18.1 (2018): 864-876.
Chicago
Iliopoulou, I., Mourouzis, I., Lambrou, G. I., Iliopoulou, D., Koutsouris, D., Pantos, C."Time‑dependent and independent effects of thyroid hormone administration following myocardial infarction in rats". Molecular Medicine Reports 18, no. 1 (2018): 864-876. https://doi.org/10.3892/mmr.2018.9008
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