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• W2938846585 abstract "Oxidative stress, iron dysregulation, and inflammation have been implicated in the pathogenesis of Parkinson's disease (PD). Considering the entwined relationship among these factors, epigallocatechin gallate (EGCG) may be a good candidate for PD treatment due to its protective effects against those factors. The objective of this study is to determine whether EGCG protects N27 dopaminergic neuronal cells from H2O2 - and TNFα- induced neurotoxicity. Seven treatments were included: control, H2O2, TNFα, FeSO4, H2O2 + EGCG, TNFα + EGCG, FeSO4 + EGCG. Cells were pretreated with 10 μM EGCG, followed by 50 μM H2O2, 30 ng/ml TNFα or 50 μM FeSO4. Neuroprotective effects of EGCG were assessed by cell viability assay, caspase-3 activity, intracellular reactive oxygen species (ROS) generation, and iron related protein expressions. Caspase-3 activity was increased to 2.8 fold (P < 0.001) and 1.5 fold (P < 0.01) with H2O2 and TNFα treatment; However, EGCG pretreatment significantly decreased the caspase activity by 50.2% (P < 0.001) and 30.1% (P < 0.05). Similarly, cell viability was reduced to 69.2% (P < 0.01) and 89% (P < 0.01) by H2O2 and TNFα, which was partially blocked by EGCG pretreatment. Also, EGCG significantly (P < 0.001) protected against H2O2- induced ROS in a time dependent manner. In addition, both H2O2 and TNFα significantly (P < 0.05) upregulated hepcidin expression and marginally reduced ferroportin (Fpn) expression unlike iron treatment alone. Collectively, our results show that EGCG protects against both TNFα- and H2O2- induced neuronal apoptosis. The observed neuroprotection may be through the inhibition of oxidative stress and inflammation which is possibly mediated mainly by hepcidin and partially by Fpn." @default.
• W2938846585 created "2019-04-25" @default.
• W2938846585 creator A5028563213 @default.
• W2938846585 creator A5071884306 @default.
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• W2938846585 date "2018-06-01" @default.
• W2938846585 modified "2023-09-24" @default.
• W2938846585 title "Epigallocatechin Gallate Protects against TNFα- or H₂O₂- Induced Apoptosis by Modulating Iron Related Proteins in a Cell Culture Model" @default.
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• W2938846585 doi "https://doi.org/10.1024/0300-9831/a000493" @default.
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• W2938846585 hasPublicationYear "2018" @default.
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