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Article

Beneficial effects of an angiotensin‑II receptor blocker on structural atrial reverse‑remodeling in a rat model of ischemic heart failure

  • Authors:
    • Namsik Yoon
    • Jeong Gwan Cho
    • Kye Hun Kim
    • Keun Ho Park
    • Doo Sun Sim
    • Hyun Ju Yoon
    • Young Joon Hong
    • Hyung Wook Park
    • Ju Han Kim
    • Youngkeun Ahn
    • Myung Ho Jeong
    • Jong Chun Park
  • View Affiliations / Copyright

    Affiliations: Department of Cardiovascular Medicine, The Heart Center of Chonnam National University Hospital, Chonnam National University Research Institute of Medical Science, Gwangju 501‑757, Republic of Korea
  • Pages: 1009-1016
    |
    Published online on: January 23, 2013
       https://doi.org/10.3892/etm.2013.920
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Abstract

The remodeling of gap junctions may affect their conduction properties and contribute to the maintenance of atrial fibrillation. The significance of the role of angiotensin‑II receptor blockers (ARBs) in upstream therapy is not clear. This study was performed to investigate the effects of ARBs on atrial remodeling in a heart failure model. A model of heart failure was established or sham surgery performed in 24 Sprague‑Dawley male rats. The rats were divided into sham, heart failure and heart failure‑ARB groups. In the ARB group, 30 mg/kg of losartan was administered each day for 4 weeks. Echocardiography was performed at the baseline and 4 weeks following the surgery. An atrial fibrillation induction study and histological and immunohistochemical evaluation were performed 4 weeks after surgery. The increase in the left atrial diameter of the heart failure‑ARB group was smaller than that of the heart failure group (P=0.028). The atrial fibrillation inducibility and duration of induced atrial fibrillation were not different between the heart failure and heart failure‑ARB groups. Masson's trichrome staining revealed less fibrosis in the heart failure‑ARB group compared with the heart failure group. Immunohistochemical staining and western blot analysis for connexin 43 showed a lower expression level in the heart failure‑ARB group compared with that in the heart failure group. In a rat model of ischemic heart failure the ARB losartan had structural and histological atrial reverse‑remodeling effects. However, its role as an electrical stabilizer requires further study.
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Copy and paste a formatted citation
Spandidos Publications style
Yoon N, Cho JG, Kim KH, Park KH, Sim DS, Yoon HJ, Hong YJ, Park HW, Kim JH, Ahn Y, Ahn Y, et al: Beneficial effects of an angiotensin‑II receptor blocker on structural atrial reverse‑remodeling in a rat model of ischemic heart failure. Exp Ther Med 5: 1009-1016, 2013.
APA
Yoon, N., Cho, J.G., Kim, K.H., Park, K.H., Sim, D.S., Yoon, H.J. ... Park, J.C. (2013). Beneficial effects of an angiotensin‑II receptor blocker on structural atrial reverse‑remodeling in a rat model of ischemic heart failure. Experimental and Therapeutic Medicine, 5, 1009-1016. https://doi.org/10.3892/etm.2013.920
MLA
Yoon, N., Cho, J. G., Kim, K. H., Park, K. H., Sim, D. S., Yoon, H. J., Hong, Y. J., Park, H. W., Kim, J. H., Ahn, Y., Jeong, M. H., Park, J. C."Beneficial effects of an angiotensin‑II receptor blocker on structural atrial reverse‑remodeling in a rat model of ischemic heart failure". Experimental and Therapeutic Medicine 5.4 (2013): 1009-1016.
Chicago
Yoon, N., Cho, J. G., Kim, K. H., Park, K. H., Sim, D. S., Yoon, H. J., Hong, Y. J., Park, H. W., Kim, J. H., Ahn, Y., Jeong, M. H., Park, J. C."Beneficial effects of an angiotensin‑II receptor blocker on structural atrial reverse‑remodeling in a rat model of ischemic heart failure". Experimental and Therapeutic Medicine 5, no. 4 (2013): 1009-1016. https://doi.org/10.3892/etm.2013.920
Copy and paste a formatted citation
x
Spandidos Publications style
Yoon N, Cho JG, Kim KH, Park KH, Sim DS, Yoon HJ, Hong YJ, Park HW, Kim JH, Ahn Y, Ahn Y, et al: Beneficial effects of an angiotensin‑II receptor blocker on structural atrial reverse‑remodeling in a rat model of ischemic heart failure. Exp Ther Med 5: 1009-1016, 2013.
APA
Yoon, N., Cho, J.G., Kim, K.H., Park, K.H., Sim, D.S., Yoon, H.J. ... Park, J.C. (2013). Beneficial effects of an angiotensin‑II receptor blocker on structural atrial reverse‑remodeling in a rat model of ischemic heart failure. Experimental and Therapeutic Medicine, 5, 1009-1016. https://doi.org/10.3892/etm.2013.920
MLA
Yoon, N., Cho, J. G., Kim, K. H., Park, K. H., Sim, D. S., Yoon, H. J., Hong, Y. J., Park, H. W., Kim, J. H., Ahn, Y., Jeong, M. H., Park, J. C."Beneficial effects of an angiotensin‑II receptor blocker on structural atrial reverse‑remodeling in a rat model of ischemic heart failure". Experimental and Therapeutic Medicine 5.4 (2013): 1009-1016.
Chicago
Yoon, N., Cho, J. G., Kim, K. H., Park, K. H., Sim, D. S., Yoon, H. J., Hong, Y. J., Park, H. W., Kim, J. H., Ahn, Y., Jeong, M. H., Park, J. C."Beneficial effects of an angiotensin‑II receptor blocker on structural atrial reverse‑remodeling in a rat model of ischemic heart failure". Experimental and Therapeutic Medicine 5, no. 4 (2013): 1009-1016. https://doi.org/10.3892/etm.2013.920
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