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JOURNAL ARTICLE
RESEARCH SUPPORT, U.S. GOV'T, NON-P.H.S.
Idebenone protects against oxidized low density lipoprotein induced mitochondrial dysfunction in vascular endothelial cells via GSK3β/β-catenin signalling pathways.
Biochemical and Biophysical Research Communications 2015 September 26
The early stages of the atherosclerotic process are initiated by accumulation of oxidized low-density lipoprotein (oxLDL) and damage to the structure or function of the endothelium. Antioxidant supplementation may be a plausible strategy to prevent atherosclerotic disease by quenching excessive reactive oxidative species. In the present study, we demonstrated that idebenone at suitable concentrations significantly prevented oxLDL-induced endothelial dysfunction. The underlying mechanisms of idebenone included inhibition of oxidative damage, suppression of the down-regulation of Bcl-2 and up-regulation of Bax and cleaved caspase-3 in human umbilical vein endothelial cells (HUVECs) exposed to oxLDL. Moreover, idebenone pretreatment inhibited oxLDL-mediated HUVECs damage by attenuating lipid peroxidation and promoting SOD activity. Finally, pro-incubation with idebenone inhibited mitochondrial dysfunction induced by oxLDL through the mitochondrial-dependent apoptotic pathway and GSK3β/β-catenin signalling pathways. In summary, idebenone is a promising agent in the treatment or prevention of atherosclerosis via inhibiting oxidative stress and improving mitochondrial function.
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