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• W3082326589 endingPage "820" @default.
• W3082326589 startingPage "820" @default.
• W3082326589 abstract "Methylglyoxal (MG) is a dicarbonyl compound, the level of which is increased in the blood of diabetes patients. MG is reported to be involved in the development of cerebrovascular complications in diabetes, but the exact mechanisms need to be elucidated. Here, we investigated the possible roles of oxidative stress and mitophagy in MG-induced functional damage in brain endothelial cells (ECs). Treatment of MG significantly altered metabolic stress as observed by the oxygen-consumption rate and barrier-integrity as found in impaired trans-endothelial electrical resistance in brain ECs. The accumulation of MG adducts and the disturbance of the glyoxalase system, which are major detoxification enzymes of MG, occurred concurrently. Reactive oxygen species (ROS)-triggered oxidative damage was observed with increased mitochondrial ROS production and the suppressed Akt/hypoxia-inducible factor 1 alpha (HIF-1α) pathway. Along with the disturbance of mitochondrial bioenergetic function, parkin-1-mediated mitophagy was increased by MG. Treatment of N-acetyl cysteine significantly reversed mitochondrial damage and mitophagy. Notably, MG induced dysregulation of tight junction proteins including occludin, claudin-5, and zonula occluden-1 in brain ECs. Here, we propose that diabetic metabolite MG-associated oxidative stress may contribute to mitochondrial damage and autophagy in brain ECs, resulting in the dysregulation of tight junction proteins and the impairment of permeability." @default.
• W3082326589 created "2020-09-08" @default.
• W3082326589 creator A5026463051 @default.
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• W3082326589 date "2020-09-03" @default.
• W3082326589 modified "2023-10-11" @default.
• W3082326589 title "Methylglyoxal-Induced Dysfunction in Brain Endothelial Cells via the Suppression of Akt/HIF-1α Pathway and Activation of Mitophagy Associated with Increased Reactive Oxygen Species" @default.
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• W3082326589 doi "https://doi.org/10.3390/antiox9090820" @default.
• W3082326589 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7554889" @default.
• W3082326589 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/32899154" @default.
• W3082326589 hasPublicationYear "2020" @default.
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