Open Access

Astragaloside IV prevents endothelial dysfunction by improving oxidative stress in streptozotocin‑induced diabetic mouse aortas

  • Authors:
    • Yang Zhang
    • Xiao-Dong Mao
    • Ai-Li Cao
    • Shuang Chu
    • Zhi-Jun Li
    • Yun-Man Wang
    • Wen Peng
    • Li Wang
    • Hao Wang
  • View Affiliations

  • Published online on: August 20, 2021     https://doi.org/10.3892/etm.2021.10631
  • Article Number: 1197
  • Copyright: © Zhang et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Oxidative stress serves a role in endothelial dysfunction exhibited by patients with diabetes mellitus. Astragaloside IV (AS‑IV) is a major active ingredient of Radix Astragali, which is considered to exhibit vasoprotective effects through unknown mechanisms. Thus, the current study was performed to investigate the protective effects of AS‑IV in streptozotocin (STZ)‑induced endothelial dysfunction and to explore whether antioxidant mechanisms were involved. The protective effects of AS‑IV on the endothelium‑dependent relaxation and contraction of aortic rings were determined by isometric tension recordings. NADPH subunits and endothelial nitric oxide synthase (eNOS) expression was identified via western blotting. Superoxide dismutase and malondialdehyde levels were assayed using ELISA. Furthermore, the generation of reactive oxygen species (ROS) and nitric oxide (NO) was detected via dihydroethidium and 4,5‑diaminofluorescein diacetate staining, respectively. The results revealed that STZ‑injected mice exhibited increased aortic endothelium‑dependent vasoconstriction and decreased vasorelaxation to acetylcholine. However, AS‑IV treatment reversed these effects. NG‑nitro‑L‑arginine was subsequently used to completely inhibit impaired relaxation. Accordingly, impaired NO generation was restored following AS‑IV treatment by increasing eNOS phosphorylation levels. Furthermore, ROS formation was also depressed following AS‑IV treatment compared with that in STZ‑injected mice. AS‑IV also decreased the expression of various NADPH subunits, including human neutrophil cytochrome b light chain, neutrophil cytosolic factor 1, NADPH oxidase (NOX)2, NOX4 and Rac‑1. The results of the current study may provide novel evidence that diabetes‑induced vascular injury arises from either the inhibition of eNOS or the activation of NOX‑derived ROS generation. In addition, the results warrant further investigation into the application of AS‑IV treatment, leading to the improvement of oxidative stress, in patients with diabetes exhibiting endothelial dysfunction.
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November-2021
Volume 22 Issue 5

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

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Spandidos Publications style
Zhang Y, Mao X, Cao A, Chu S, Li Z, Wang Y, Peng W, Wang L and Wang H: Astragaloside IV prevents endothelial dysfunction by improving oxidative stress in streptozotocin‑induced diabetic mouse aortas. Exp Ther Med 22: 1197, 2021
APA
Zhang, Y., Mao, X., Cao, A., Chu, S., Li, Z., Wang, Y. ... Wang, H. (2021). Astragaloside IV prevents endothelial dysfunction by improving oxidative stress in streptozotocin‑induced diabetic mouse aortas. Experimental and Therapeutic Medicine, 22, 1197. https://doi.org/10.3892/etm.2021.10631
MLA
Zhang, Y., Mao, X., Cao, A., Chu, S., Li, Z., Wang, Y., Peng, W., Wang, L., Wang, H."Astragaloside IV prevents endothelial dysfunction by improving oxidative stress in streptozotocin‑induced diabetic mouse aortas". Experimental and Therapeutic Medicine 22.5 (2021): 1197.
Chicago
Zhang, Y., Mao, X., Cao, A., Chu, S., Li, Z., Wang, Y., Peng, W., Wang, L., Wang, H."Astragaloside IV prevents endothelial dysfunction by improving oxidative stress in streptozotocin‑induced diabetic mouse aortas". Experimental and Therapeutic Medicine 22, no. 5 (2021): 1197. https://doi.org/10.3892/etm.2021.10631