High glucose upregulates endothelin type B receptors in vascular smooth muscle cells via the downregulation of Sirt1

  • Authors:
    • Yan Lin
    • Yan Zhao
    • Enqi Liu
  • View Affiliations

  • Published online on: November 7, 2017     https://doi.org/10.3892/ijmm.2017.3242
  • Pages:439-445
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Abstract

Silent information regulator family protein 1 (Sirt1) has recently gained attention for its protective effects against diabetic and cardiovascular diseases (CVDs). Vascular smooth muscle endothelin type B (ETB) receptors are involved in the pathogenesis of CVDs and diabetes. The aim of present study was to explore whether Sirt1 is involved in high glucose (HG)-mediated regulation of ETB receptors in rat superior mesenteric arteries (SMA). The rat SMA segments were cultured in the presence and absence of HG with or without the activator of Sirt1 and specific inhibitor for the extracellular signal-regulated protein kinase 1/2 (ERK1/2) for 24 h. Following organ culture, the contractile responses to sarafotoxin 6c were studied using a sensitive myograph, and the ETB receptor protein expression level was determined using western blotting. The results demonstrated that HG induced upregulation of ETB receptor expression and increased receptor-mediated vasoconstriction in SMA. Resveratrol (Res; a Sirt1 activator) concentration-dependently inhibited the HG-induced upregulation of ETB receptor expression and receptor-mediated vasoconstriction. Additionally, these effects could also be abolished by an inhibitor of the ERK1/2 signaling pathway. Furthermore, upregulation of ERK1/2 phosphorylation induced by HG was inhibited by Res. In conclusion, HG upregulated ETB receptors by downregulating Sirt1 and subsequently activating the ERK1/2 signaling pathways in the organ culture SMA.

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January 2018
Volume 41 Issue 1

Print ISSN: 1107-3756
Online ISSN:1791-244X

2016 Impact Factor: 2.341
Ranked #21/128 Medicine Research and Experimental
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APA
Lin, Y., Zhao, Y., & Liu, E. (2018). High glucose upregulates endothelin type B receptors in vascular smooth muscle cells via the downregulation of Sirt1. International Journal of Molecular Medicine, 41, 439-445. https://doi.org/10.3892/ijmm.2017.3242
MLA
Lin, Y., Zhao, Y., Liu, E."High glucose upregulates endothelin type B receptors in vascular smooth muscle cells via the downregulation of Sirt1". International Journal of Molecular Medicine 41.1 (2018): 439-445.
Chicago
Lin, Y., Zhao, Y., Liu, E."High glucose upregulates endothelin type B receptors in vascular smooth muscle cells via the downregulation of Sirt1". International Journal of Molecular Medicine 41, no. 1 (2018): 439-445. https://doi.org/10.3892/ijmm.2017.3242