Open Access

Sinomenine activation of Nrf2 signaling prevents inflammation and cerebral injury in a mouse model of ischemic stroke

  • Authors:
    • Fangfang Bi
    • Yiyong Zhang
    • Wenbo Liu
    • Keliang Xie
  • View Affiliations

  • Published online on: April 18, 2021     https://doi.org/10.3892/etm.2021.10079
  • Article Number: 647
  • Copyright: © Bi et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Sinomenine (SINO), which is used clinically to treat rheumatoid arthritis and neuralgia, is derived from the root and stems of Sinomenium acutum. SINO has been reported to exert analgesic, sedative and anti‑inflammatory effects, and provides a protective role against shock and organ damage. Studies have suggested that SINO primarily exerts it anti‑inflammatory function by inhibiting NF‑κB signaling. There is also evidence to indicate that SINO may regulate inflammation Nuclear factor (erythroid‑derived 2)‑like 2 (Nrf2) signaling. The present study aimed to investigate whether the anti‑inflammatory and cerebral protective effects of SINO were induced through Nrf2 both in vitro and in vivo. The results revealed that SINO significantly upregulated Nrf2 protein expression levels, increased Nrf2 nuclear translocation and the upregulated the protein expression levels of downstream factors. The treatment of a middle cerebral artery occlusion model mice with SINO effectively reduced cerebral damage and inflammation, and restored the balance in cerebral oxidative stress. In addition, SINO treatment also promoted Nrf2‑dependent microglia M1/M2 polarization and inhibited the phosphorylation of IκBα as well as NF‑κB nuclear translocation. This revealed an important upstream event that contributed to its anti‑inflammatory and cerebral tissue protective effects. In conclusion, the findings of the present study identified a novel pathway through which SINO may exert its anti‑inflammatory and cerebral protective functions, and provided a molecular basis for the potential applications of SINO in the treatment of cerebral inflammatory disorders.

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June-2021
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Spandidos Publications style
Bi F, Zhang Y, Liu W and Xie K: Sinomenine activation of Nrf2 signaling prevents inflammation and cerebral injury in a mouse model of ischemic stroke. Exp Ther Med 21: 647, 2021
APA
Bi, F., Zhang, Y., Liu, W., & Xie, K. (2021). Sinomenine activation of Nrf2 signaling prevents inflammation and cerebral injury in a mouse model of ischemic stroke. Experimental and Therapeutic Medicine, 21, 647. https://doi.org/10.3892/etm.2021.10079
MLA
Bi, F., Zhang, Y., Liu, W., Xie, K."Sinomenine activation of Nrf2 signaling prevents inflammation and cerebral injury in a mouse model of ischemic stroke". Experimental and Therapeutic Medicine 21.6 (2021): 647.
Chicago
Bi, F., Zhang, Y., Liu, W., Xie, K."Sinomenine activation of Nrf2 signaling prevents inflammation and cerebral injury in a mouse model of ischemic stroke". Experimental and Therapeutic Medicine 21, no. 6 (2021): 647. https://doi.org/10.3892/etm.2021.10079