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• W4386700839 abstract "Ischemic stroke, a major cause of death and disability worldwide, results from reduced blood flow to the brain, leading to irreversible neuronal damage. Recent evidence suggests that ferroptosis, a form of regulated cell death, plays a critical role in the pathogenesis of ischemic stroke. Rhein, a natural anthraquinone compound, has demonstrated neuroprotective effects; However, its role in ferroptosis and the underlying mechanisms remain unclear. Here, we investigated the protective effects of Rhein against ischemia/reperfusion (I/R) injury in a rat model of middle cerebral artery occlusion (MCAO) and oxygen-glucose deprivation/reperfusion (OGD/R)-induced HT22 cells. Rhein treatment dose-dependently ameliorated neurological deficits, reduced infarct volume, and attenuated blood-brain barrier (BBB) disruption in the MCAO model. Furthermore, Rhein suppressed oxidative stress, intracellular ROS generation, and ferroptosis-related protein expression in both in vivo and in vitro models. Mechanistically, Rhein protected against OGD/R-induced HT22 cell injury by regulating the NRF2/SLC7A11/GPX4 signaling pathway. This effect was abolished upon NRF2 inhibition, suggesting that Rhein's neuroprotective action is NRF2-dependent. Molecular docking and microscale thermophoresis analyses further supported the direct interaction between Rhein and the ferroptosis-related protein NRF2. Collectively, our findings reveal that Rhein confers neuroprotection against cerebral I/R injury by inhibiting ferroptosis via the NRF2/SLC7A11/GPX4 axis, providing a potential therapeutic avenue for ischemic stroke.To investigate the neuroprotective effects of Rhein, a natural anthraquinone compound, against ischemia/reperfusion (I/R) injury and elucidate the underlying mechanisms involving ferroptosis and the NRF2/SLC7A11/GPX4 pathway.A rat model of middle cerebral artery occlusion (MCAO) was employed for in vivo assessments, while oxygen-glucose deprivation/reperfusion (OGD/R)-induced HT22 cells were used as an in vitro model. Comprehensive analyses, including neurological score assessment, triphenyl tetrazolium chloride staining, Evans Blue leakage assay, intracellular ROS detection, MTT assay, dual-luciferase reporter assay, oxidative stress and Fe2+ content assessment, immunofluorescence, Western blot, flow cytometry, molecular docking, and microscale thermophoresis, were performed to evaluate the effects of Rhein on I/R injury and ferroptosis.Rhein conferred dose-dependent neuroprotection against cerebral I/R injury, reducing infarct volume and blood-brain barrier (BBB) disruption in the MCAO model. In both in vivo and in vitro models, Rhein suppressed oxidative stress, intracellular ROS generation, and ferroptosis-related protein expression. Furthermore, Rhein protected HT22 cells from OGD/R-induced injury by regulating the NRF2/SLC7A11/GPX4 signaling pathway, with NRF2 inhibition abolishing these therapeutic effects. Molecular docking and microscale thermophoresis analyses supported a direct interaction between Rhein and NRF2, a ferroptosis-related protein.Rhein attenuates cerebral I/R injury by inhibiting ferroptosis via the NRF2/SLC7A11/GPX4 axis, highlighting its potential as a therapeutic agent for ischemic stroke." @default.
• W4386700839 created "2023-09-14" @default.
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• W4386700839 date "2023-11-01" @default.
• W4386700839 modified "2023-10-14" @default.
• W4386700839 title "Rhein attenuates cerebral ischemia-reperfusion injury via inhibition of ferroptosis through NRF2/SLC7A11/GPX4 pathway" @default.
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• W4386700839 doi "https://doi.org/10.1016/j.expneurol.2023.114541" @default.
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