Troxerutin attenuates cognitive decline in the hippocampus of male diabetic rats by inhibiting NADPH oxidase and activating the Nrf2/ARE signaling pathway

  • Authors:
    • Ming Gao
    • Yaxing Kang
    • Lihui Zhang
    • Hongyan Li
    • Changhui Qu
    • Xiaqing Luan
    • Lijun Liu
    • Songyun Zhang
  • View Affiliations

  • Published online on: June 19, 2020     https://doi.org/10.3892/ijmm.2020.4653
  • Pages: 1239-1248
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Abstract

Diabetes‑associated cognitive decline is a recently identified a potential complication of diabetes. The present study was designed to examine the effects of troxerutin, a potent antioxidant, on cognitive function in rats with streptozotocin‑induced diabetes and to further explore the potential underlying mechanisms. Cognitive functions were investigated by the Morris water maze test. The malondialdehyde (MDA) level and superoxide dismutase (SOD) activity in the hippocampus were assessed as the parameters of oxidative stress. Subunits of the NADPH oxidase (NOX) expression and nuclear factor erythroid 2‑related factor 2/antioxidant responsive element (Nrf2/ARE) signaling pathway were detected to explore the potential underlying mechanisms. The water maze test revealed that troxerutin significantly improved cognitive impairment in diabetic rats. Troxerutin treatment attenuated oxidative stress in the hippocampus of diabetic rats, as evidenced by the decreased MDA level and the increased SOD activity. Moreover, troxerutin activated the Nrf2/ARE signaling pathway via Nrf2 nuclear translocation in the cells in the hippocampus of diabetic rats. Troxerutin elevated the expression levels of the antioxidant enzymes, heme oxygenase‑1 (HO‑1) and NAD(P)H:quinone oxidoreductase (NQO1), and decreased the expression levels of the NOX subunits, gp91phox, p47phox and p22phox. On the whole, these findings demonstrate that troxerutin exerts neuroprotective effects against diabetes‑associated cognitive decline by suppressing oxidative stress in the hippocampus of rats with streptozotocin‑induced diabetes. Troxerutin may thus prove to be a potential therapeutic medicine for the treatment of diabetes‑associated cognitive decline.

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September-2020
Volume 46 Issue 3

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

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Spandidos Publications style
Gao M, Kang Y, Zhang L, Li H, Qu C, Luan X, Liu L and Zhang S: Troxerutin attenuates cognitive decline in the hippocampus of male diabetic rats by inhibiting NADPH oxidase and activating the Nrf2/ARE signaling pathway. Int J Mol Med 46: 1239-1248, 2020
APA
Gao, M., Kang, Y., Zhang, L., Li, H., Qu, C., Luan, X. ... Zhang, S. (2020). Troxerutin attenuates cognitive decline in the hippocampus of male diabetic rats by inhibiting NADPH oxidase and activating the Nrf2/ARE signaling pathway. International Journal of Molecular Medicine, 46, 1239-1248. https://doi.org/10.3892/ijmm.2020.4653
MLA
Gao, M., Kang, Y., Zhang, L., Li, H., Qu, C., Luan, X., Liu, L., Zhang, S."Troxerutin attenuates cognitive decline in the hippocampus of male diabetic rats by inhibiting NADPH oxidase and activating the Nrf2/ARE signaling pathway". International Journal of Molecular Medicine 46.3 (2020): 1239-1248.
Chicago
Gao, M., Kang, Y., Zhang, L., Li, H., Qu, C., Luan, X., Liu, L., Zhang, S."Troxerutin attenuates cognitive decline in the hippocampus of male diabetic rats by inhibiting NADPH oxidase and activating the Nrf2/ARE signaling pathway". International Journal of Molecular Medicine 46, no. 3 (2020): 1239-1248. https://doi.org/10.3892/ijmm.2020.4653