Association between connexin 40 and potassium voltage‑gated channel subfamily A member 5 expression in the atrial myocytes of patients with atrial fibrillation

  • Authors:
    • Fei Zhang
    • Yuhao Bian
    • Lei Huang
    • Wenbin Fan
  • View Affiliations

  • Published online on: September 19, 2017     https://doi.org/10.3892/etm.2017.5129
  • Pages: 5170-5176
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Abstract

Structural and electrical remodeling within the atrium mediate the pathogenesis of atrial fibrillation (AF). Two key genes that sever a role in this remodeling are connexin 40 (Cx40) and potassium voltage‑gated channel subfamily A member 5 (KCNA5), respectively. Electrical remodeling is considered to induce structural remodeling during AF. In the present study, the left atrial appendage section and atrial myocytes of patients with AF were evaluated. It was observed that Cx40 and KCNA5 mRNA (P<0.05) and protein (P<0.01) expression was significantly downregulated in AF compared with rheumatic heart disease. In addition, a positive correlation between the mRNA expression Cx40 and KCNA5 was observed in the atrial myocytes of patients with AF (P<0.05; r=0.42). The association between Cx40 and KCNA5 expression was subsequently investigated in primary cultured atrial myocytes using siRNA transfection. In atrial myocytes, downregulation of Cx40 inhibited the expression of KCNA5. Similarly, silencing of KCNA5 suppressed the expression of Cx40. These results indicate that synergistic regulation may occur between Cx40 and KCNA5 expression. Furthermore, the combined effects of electrical and structural remodeling in the atrial myocytes of patients with AF may contribute to the pathogenesis of AF.
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November-2017
Volume 14 Issue 5

Print ISSN: 1792-0981
Online ISSN:1792-1015

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Spandidos Publications style
Zhang F, Bian Y, Huang L and Fan W: Association between connexin 40 and potassium voltage‑gated channel subfamily A member 5 expression in the atrial myocytes of patients with atrial fibrillation. Exp Ther Med 14: 5170-5176, 2017
APA
Zhang, F., Bian, Y., Huang, L., & Fan, W. (2017). Association between connexin 40 and potassium voltage‑gated channel subfamily A member 5 expression in the atrial myocytes of patients with atrial fibrillation. Experimental and Therapeutic Medicine, 14, 5170-5176. https://doi.org/10.3892/etm.2017.5129
MLA
Zhang, F., Bian, Y., Huang, L., Fan, W."Association between connexin 40 and potassium voltage‑gated channel subfamily A member 5 expression in the atrial myocytes of patients with atrial fibrillation". Experimental and Therapeutic Medicine 14.5 (2017): 5170-5176.
Chicago
Zhang, F., Bian, Y., Huang, L., Fan, W."Association between connexin 40 and potassium voltage‑gated channel subfamily A member 5 expression in the atrial myocytes of patients with atrial fibrillation". Experimental and Therapeutic Medicine 14, no. 5 (2017): 5170-5176. https://doi.org/10.3892/etm.2017.5129