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• W2088857580 abstract "Aim: Alpha7 nicotinic acetylcholine receptor (α7nAChR), a subtype of nAChR regulating neurotransmission in central nervous system, is an essential regulator of cholinergic anti-inflammatory pathway in periphery. The present study was to determine the effects of activation of α7nAChR on oxidant stress-induced injury in endothelial cells. Methods: Cultured human umbilical vein endothelial cells were treated with H2O2 (400 µM) or H2O2 plus PNU-282987 (10 µM). Cell viability and membrane integrity were measured. Annexin V + PI assay, immunoblotting of bcl-2, bax and cleaved capase-3, and immunofluorescence of apoptosis inducing factor (AIF) were performed to evaluate apoptosis. Protein expression of vascular peroxidase-1 (VPO-1) and phosphor-JNK were measured by immunoblotting. Results: Activation of α7nAChR by a selective agonist PNU-282987 prevented H2O2-indced decrease of cell viability and increase of lactate dehydrogenase release. Activation of α7nAChR markedly reduced cell apoptosis and intracellular oxidative stress level. Moreover, activation of α7nAChR reduced H2O2-induced VPO-1 protein upregulation and JNK1/2 phosphorylation. The inhibitory effect of α7nAChR activation on VPO-1 was blocked by JNK inhibitor SP600125. In addition, pretreatment of α7nAChR antagonist methyllycaconitine blocked the cytoprotective effect of PNU-282987. Conclusion: These results provide the first evidence that activation of α7nAChR protects against oxidant stress-induced damage by suppressing VPO-1 in a JNK signaling pathway-dependent manner in endothelial cells." @default.
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• W2088857580 date "2014-01-01" @default.
• W2088857580 modified "2023-09-27" @default.
• W2088857580 title "Activation of a7 Nicotinic Acetylcholine Receptor Protects Against Oxidant Stress Damage Through Reducing Vascular Peroxidase-1 in a JNK Signaling-Dependent Manner in Endothelial Cells" @default.
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• W2088857580 doi "https://doi.org/10.1159/000358627" @default.
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