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- W1972775556 endingPage "6639" @default.
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- W1972775556 abstract "Endothelial dysfunction and oxidative stress likely play roles in PM2.5-induced harmful effects. Epigallocatechin-3-gallate (EGCG), the major polyphenolic constituent of green tea, is a potent antioxidant that exerts protective effects on cardiovascular diseases (CVDs) in part by scavenging free radicals. The exposure to ambient fine particulate matter (PM2.5) is responsible for certain CVDs. The aim of the present study was to investigate whether EGCG could also inhibit PM2.5-induced oxidative stress by activating the nuclear factor E2-related factor 2 (Nrf2)/heme oxygenase-1 (HO-1) pathway in human umbilical vein endothelial cells (HUVECs). PM2.5 (200 μg/mL) increased both cell death and intracellular ROS levels significantly, whereas EGCG (50–400 μM) inhibited these effects in a concentration-dependent manner. Western blotting and PCR demonstrated that EGCG increased Nrf2 and HO-1 expression in HUVECs that had been exposed to PM2.5. PD98059 (a selective inhibitor of extracellular signal regulated kinase [ERK]-1/2) and SB203580 (a selective inhibitor of p38 MAPK), but not SP600125 (a selective inhibitor of c-jun N-terminal kinase [JNK]), attenuated the EGCG-induced Nrf2 and HO-1 expression. In addition, silencing Nrf2 abolished EGCG-induced Nrf2 and HO-1 upregulation and enhancement of cell viability. The present study suggests that EGCG protects HUVECs from PM2.5-induced oxidative stress injury by upregulating Nrf2/HO-1 via activation of the p38 MAPK and the ERK1/2 signaling pathways." @default.
- W1972775556 created "2016-06-24" @default.
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- W1972775556 date "2015-04-14" @default.
- W1972775556 modified "2023-09-26" @default.
- W1972775556 title "Epigallocatechin-3-Gallate Protects HUVECs from PM2.5-Induced Oxidative Stress Injury by Activating Critical Antioxidant Pathways" @default.
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- W1972775556 doi "https://doi.org/10.3390/molecules20046626" @default.
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