Abstract
Oxidative stress is involved in the pathogenesis of Alzheimer’s disease (AD), which is linked to reactive oxygen species (ROS), lipid peroxidation, and neurotoxicity. Emerging evidence suggests a role of nuclear factor (erythroid-derived 2)-like 2 (Nrf2), a major source of antioxidant response elements in AD. The molecular mechanism of oxidative stress and ferroptosis in astrocytes in AD is not yet fully understood. Here, we aimed to investigate the mechanism by which Nrf2 regulates the ferroptosis of astrocytes in AD. We found decreased expression of Nrf2 and upregulated expression of the ROS marker NADPH oxidase 4 (NOX4) in the frontal cortex from patients with AD and in the cortex of 3×Tg mice compared to wildtype mice. We demonstrated that Nrf2 deficiency led to ferroptosis-dependent oxidative stress-induced ROS with downregulated heme oxygenase-1 and glutathione peroxidase 4 and upregulated cystine glutamate expression. Moreover, Nrf2 deficiency increased lipid peroxidation, DNA oxidation, and mitochondrial fragmentation in mouse astrocytes (mAS, M1800-57). In conclusion, these results suggest that Nrf2 deficiency promotes ferroptosis of astrocytes involving oxidative stress in AD.
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Funding
This work was supported by the Chinese National Natural Science Foundation (81960265, 82260263), the China Postdoctoral Science Foundation (2020M683659XB), the Foundation for Guizhou Provincial Science and Technology projects ([2020]1Y354 and [2023]232), the Department of Education of Guizhou Province [Nos. KY (2021)313], the Scientific Research Project of Guizhou Medical University (J[48]), and the Foundation for Science and Technology projects in Guiyang ([2019]9–2-7).
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Conceptualization ZT, RN, and XLQ; data curation, investigation, formal analysis: ZYC, ZT, and YX; supervision, resources, project administration: RN and ZT; Original draft: XLQ, ZYC, RN, and ZT; review and editing: all authors.
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Tang, Z., Chen, Z., Guo, M. et al. NRF2 Deficiency Promotes Ferroptosis of Astrocytes Mediated by Oxidative Stress in Alzheimer’s Disease. Mol Neurobiol (2024). https://doi.org/10.1007/s12035-024-04023-9
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DOI: https://doi.org/10.1007/s12035-024-04023-9