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• W2900969673 abstract "Inhibition of ROS-mediated activation Src-MAPK/AKT signaling by orientin alleviates H2O2-induced apoptosis in PC12 cells Shimei Qi,1,2,* Zunyong Feng,1,3,* Qiang Li,1,2 Zhilin Qi,1,2 Yao Zhang1,2 1Anhui Province Key Laboratory of Active Biological Macro-molecules, Wannan Medical College, Wuhu 241002, People’s Republic of China; 2Department of Biochemistry, Wannan Medical College, Wuhu 241002, People’s Republic of China; 3Department of Forensic Medicine, Wannan Medical College, Wuhu 241002, People’s Republic of China *These authors contributed equally to this work Purpose: Reactive oxygen species (ROS) are considered a direct cause of neurodegenerative diseases (NDDs). Drugs developed to target ROS are effective for the treatment of NDDs. Orientin is a pyrone glucoside extracted from Polygonum orientale, and it exhibits many pharmacological activities. In this study, we aimed to determine whether orientin could relieve hydrogen peroxide (H2O2)-induced neuronal apoptosis and to investigate the specific target of orientin.Materials and methods: In this study, the neuroprotective effect and its possible mechanisms of orientin in mouse pheochromocytoma cell line (PC12) cells stimulated by H2O2, establishing an oxidative stress model, were investigated. And we further tested the role of ROS in the neuroprotective effects of orientin.Results: Orientin (5–100 µg/mL) did not cause toxicity in PC12 cells but significantly decreased H2O2-induced reduction in PC12 cell viability, cell apoptosis rates, and nuclear condensation. It also inhibited the activation of caspase-3 and degradation of poly(ADP-ribose) polymerase (PARP). Under the stimulation of H2O2, MAPKs (ERK, JNK, and p38), AKT, and Src signaling proteins in PC12 cells were activated in a time-dependent manner. The application of inhibitors that were specific for MAPKs, AKT, and Src effectively alleviated H2O2-induced cell apoptosis. In addition, the Src inhibitor decreased the activation of MAPKs and AKT signaling. More importantly, orientin effectively decreased H2O2-induced phosphorylation of MAPKs, AKT, and Src signaling proteins. Finally, we confirmed that orientin effectively inhibited H2O2-induced accumulation of ROS in cells. In addition, ROS inhibitors blocked the Src-MAPKs/AKT signaling pathway-dependent cell apoptosis stimulated by H2O2.Conclusion: These results indicate that alleviation of H2O2-induced cell apoptosis by orientin is Src-MAPKs/AKT dependent. Overall, our study confirms that orientin alleviates H2O2-induced cell apoptosis by inhibiting the ROS-mediated activation of Src-MAPKs/AKT signaling. Keywords: oxidative stress, orientin, neuroprotection, apoptosis, Src, MAPKs, AKT" @default.
• W2900969673 created "2018-11-29" @default.
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• W2900969673 date "2018-11-01" @default.
• W2900969673 modified "2023-09-25" @default.
• W2900969673 title "Inhibition of ROS-mediated activation Src-MAPK/AKT signaling by orientin alleviates H₂O₂-induced&nbsp;apoptosis in PC12 cells" @default.
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• W2900969673 doi "https://doi.org/10.2147/dddt.s178217" @default.
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