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Significance of hypoxia-inducible factor‑1α expression with atrial fibrosis in rats induced with isoproterenol

  • Authors:
    • Fangju Su
    • Weize Zhang
    • Yongqing Chen
    • Ling Ma
    • Hanping Zhang
    • Fei Wang
  • View Affiliations / Copyright

    Affiliations: Department of Cardiology, Lanzhou General Hospital, People's Liberation Army, Lanzhou, Gansu 730050, P.R. China
  • Pages: 1677-1682
    |
    Published online on: September 24, 2014
       https://doi.org/10.3892/etm.2014.1989
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Abstract

Atrial interstitial fibrosis plays a dual role in inducing and maintaining atrial fibrillation (AF). Hypoxia‑inducible factor‑1α (HIF‑1α) has been reported as closely associated with renal, liver and pulmonary fibrosis diseases. However, whether HIF‑1α is involved in myocardial fibrosis, and the associations between HIF‑1α, transforming growth factor‑β1 (TGF‑β1) and matrix metalloproteinase‑9 (MMP‑9) remain unknown. Therefore, this area warrants studying for the significance of AF diagnosis and treatment. The present study investigated the expression of HIF‑1α in atrial fibrosis and its possible mechanism in isoproterenol (ISO)‑induced rats. The three groups of rats; control, ISO and ISO plus sirolimus [also known as rapamycin (Rapa)], were treated for 15 days and sacrificed to remove the myocardial tissues. The expression levels of HIF‑1α, TGF‑β1 and MMP‑9 and their associations with atrial fibrosis were examined through histomorphology and protein and mRNA levels. The protein and mRNA levels of HIF‑1α, TGF‑β1 and MMP‑9 in the ISO group were increased markedly (P<0.01) compared with the control group, while those in the Rapa group were clearly decreased (P<0.01) compared with the ISO group. The protein and mRNA levels of HIF‑1α, TGF‑β1 and MMP‑9 were positively correlated (P<0.01) with atrial fibrosis (collagen volume fraction index), as were the HIF‑1α, TGF‑β1 and MMP‑9 mRNA levels (P<0.01) and the mRNA levels between MMP‑9 and TGF‑β1 (P<0.01). During the process of atrial fibrosis in ISO‑induced rats, HIF‑1α promotes the expression of TGF‑β1 and MMP‑9 protein, and thus is involved in in atrial fibrosis.
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Copy and paste a formatted citation
Spandidos Publications style
Su F, Zhang W, Chen Y, Ma L, Zhang H and Wang F: Significance of hypoxia-inducible factor‑1α expression with atrial fibrosis in rats induced with isoproterenol. Exp Ther Med 8: 1677-1682, 2014.
APA
Su, F., Zhang, W., Chen, Y., Ma, L., Zhang, H., & Wang, F. (2014). Significance of hypoxia-inducible factor‑1α expression with atrial fibrosis in rats induced with isoproterenol. Experimental and Therapeutic Medicine, 8, 1677-1682. https://doi.org/10.3892/etm.2014.1989
MLA
Su, F., Zhang, W., Chen, Y., Ma, L., Zhang, H., Wang, F."Significance of hypoxia-inducible factor‑1α expression with atrial fibrosis in rats induced with isoproterenol". Experimental and Therapeutic Medicine 8.6 (2014): 1677-1682.
Chicago
Su, F., Zhang, W., Chen, Y., Ma, L., Zhang, H., Wang, F."Significance of hypoxia-inducible factor‑1α expression with atrial fibrosis in rats induced with isoproterenol". Experimental and Therapeutic Medicine 8, no. 6 (2014): 1677-1682. https://doi.org/10.3892/etm.2014.1989
Copy and paste a formatted citation
x
Spandidos Publications style
Su F, Zhang W, Chen Y, Ma L, Zhang H and Wang F: Significance of hypoxia-inducible factor‑1α expression with atrial fibrosis in rats induced with isoproterenol. Exp Ther Med 8: 1677-1682, 2014.
APA
Su, F., Zhang, W., Chen, Y., Ma, L., Zhang, H., & Wang, F. (2014). Significance of hypoxia-inducible factor‑1α expression with atrial fibrosis in rats induced with isoproterenol. Experimental and Therapeutic Medicine, 8, 1677-1682. https://doi.org/10.3892/etm.2014.1989
MLA
Su, F., Zhang, W., Chen, Y., Ma, L., Zhang, H., Wang, F."Significance of hypoxia-inducible factor‑1α expression with atrial fibrosis in rats induced with isoproterenol". Experimental and Therapeutic Medicine 8.6 (2014): 1677-1682.
Chicago
Su, F., Zhang, W., Chen, Y., Ma, L., Zhang, H., Wang, F."Significance of hypoxia-inducible factor‑1α expression with atrial fibrosis in rats induced with isoproterenol". Experimental and Therapeutic Medicine 8, no. 6 (2014): 1677-1682. https://doi.org/10.3892/etm.2014.1989
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