2. Academic Validation
  3. Salidroside postconditioning attenuates ferroptosis-mediated lung ischemia-reperfusion injury by activating the Nrf2/SLC7A11 signaling axis

Salidroside postconditioning attenuates ferroptosis-mediated lung ischemia-reperfusion injury by activating the Nrf2/SLC7A11 signaling axis

  • Int Immunopharmacol. 2023 Feb:115:109731. doi: 10.1016/j.intimp.2023.109731.
Yun Wang 1,  Zhe Chen 2,  Jing Luo 3,  Jing Zhang 4,  A-Ming Sang 5,  Zhen-Shun Cheng 6,  Xin-Yi Li 7
Affiliations

Affiliations

  • 1 Department of Anesthesiology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, China. Electronic address: [email protected].
  • 2 Department of Otolaryngology Head and Neck Surgery, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, China. Electronic address: [email protected].
  • 3 Department of Anesthesiology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, China. Electronic address: [email protected].
  • 4 Department of Anesthesiology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, China. Electronic address: [email protected].
  • 5 Department of Anesthesiology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, China. Electronic address: [email protected].
  • 6 Department of Respiratory and Critical Care Medicine, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, China; Wuhan Research Center for Infectious Diseases and Cancer, Chinese Academy of Medical Sciences, Wuhan, Hubei 430071, China; Hubei Engineering Center for Infectious Disease Prevention, Control and Treatment, Wuhan, Hubei 430071, China. Electronic address: [email protected].
  • 7 Department of Anesthesiology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, China. Electronic address: [email protected].
PMID: 36907990 DOI: 10.1016/j.intimp.2023.109731
Abstract

Background: Ferroptosis, an iron-dependent programmed necrosis, is linked to lung ischemia-reperfusion injury. Salidroside is a glycoside derived from the Rhodiola rosea plant that exhibits anti-inflammatory and antioxidant properties. However, it is uncertain whether salidroside alleviates lung ischemia-reperfusion injury. This investigation explored the function of salidroside in Ferroptosis in lung ischemia-reperfusion injury.

Methods: A lung ischemia-reperfusion model was established in wild-type and Nrf2-/- mice, and pulmonary epithelial cells were exposed to hypoxia/regeneration in vitro. We evaluated ferroptosis-related factors by western blotting, transmission electron microscopy, and fluorescence microscopy. To investigate the regulation of Nrf2 by salidroside, coimmunoprecipitation and luciferase reporter assays were used. Transwell assays were used to detect macrophage migration.

Results: The data indicated that salidroside postconditioning significantly reduced Ferroptosis and alleviated lung ischemia-reperfusion injury in wild-type mice, as evidenced by improved histology and inflammation, reduced lipid peroxides and iron overload, and the induction of Nrf2, SLC7A11, and GPX4 expression. Salidroside activated Nrf2 signaling, resulting in Keap1-Nrf2 dissociation, nuclear translocation, and increased antioxidant-response element reporter activity. Sal consistently inhibited hypoxia/regeneration-induced pulmonary epithelial cell Ferroptosis by activating the Nrf2 signaling pathway. Furthermore, ferroptotic cells recruited macrophages via CCL2, whereas salidroside lowered CCL2 expression and inhibited ferroptosis-induced macrophage chemotaxis in lung ischemia-reperfusion injury. Additionally, the antiferroptotic effects of salidroside against lung ischemia-reperfusion injury were eliminated in Nrf2-/- mice.

Conclusions: This study clearly shows that salidroside postconditioning attenuates ferroptosis-mediated lung ischemia-reperfusion injury by activating the Nrf2/SLC7A11 signaling axis.

Keywords

Ferroptosis; Lung ischemia–reperfusion; Nrf2; SLC7A11; Salidroside.

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