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- W2092959920 abstract "Background: Tert-butylhydroquinone (tBHQ), a synthetic phenolic antioxidant, is commonly used as a food preservative because of its potent antilipid peroxidation activity. Several lines of evidence have demonstrated that dietary supplementation with antioxidants has an antiatherogenic function through reducing cholesterol uptake or promoting reverse cholesterol transport. In this study, we investigated whether tBHQ affects expression of ATP-binding cassette transporter A1 (ABCA1) and the potential subsequent effect on cellular cholesterol homeostasis. Methods and Results: tBHQ increased ABCA1 protein levels and markedly enhanced cholesterol efflux from THP-1 macrophage-derived foam cells. Furthermore, tBHQ reduced calpain-mediated ABCA1 proteolysis via activation of nuclear factor E2-related factor 2 (Nrf2) and heme oxygenase-1 (HO-1). Inhibition of HO-1 with a pharmacological inhibitor or siRNA and knockdown of Nrf2 suppressed the stimulatory effects of tBHQ on ABCA1 expression and calpain activity. Conclusions: Nrf2/HO-1 signaling is required for the regulation by tBHQ of ABCA1 expression and cholesterol efflux in macrophage-derived foam cells and an antiatherogenic role of tBHQ is suggested. (Circ J 2013; 77: 2399–2408)" @default.
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- W2092959920 date "2013-01-01" @default.
- W2092959920 modified "2023-10-06" @default.
- W2092959920 title "Tertiary-Butylhydroquinone Upregulates Expression of ATP-Binding Cassette Transporter A1 via Nuclear Factor E2-Related Factor 2/Heme Oxygenase-1 Signaling in THP-1 Macrophage-Derived Foam Cells" @default.
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- W2092959920 doi "https://doi.org/10.1253/circj.cj-12-1616" @default.
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