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首页> 外文期刊>Journal of biochemical and molecular toxicology >Electrophilic and Reactive Oxygen Species Detoxification Potentials of Chalcone Dimers is Mediated by Redox Transcription Factor Nrf-2
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Electrophilic and Reactive Oxygen Species Detoxification Potentials of Chalcone Dimers is Mediated by Redox Transcription Factor Nrf-2

机译:查尔酮二聚体的亲电子和活性氧解毒潜力由氧化还原转录因子Nrf-2介导。

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摘要

Nuclear erythroid related factor-2 (Nrf2), a redox-transcription factor, plays a critical role in the detoxification of electrophilic and reactive oxygen species that halt various biochemical and molecular processes. This makes it a candidate for regulation by polyphenols. This study investigates the capability of chalcone dimers (lophirones B and C) to induce expressions and activities of cytoprotective enzymes. Chalcone dimers administration to rats not only induced the Nrf2, but also suppressed cytoplasmic Kelch-like ECH-associated protein 1 (Keap1) expressions. In addition, the chalcone dimers significantly (p < 0.05) increased the expressions and activities of nicotinamide adenine dinucleotide and reduced quinone oxidoreductase-1, glutathione-S-transferase, epoxide hydrolase and uridyl glucuronosyl transferase in rat liver. Also, activities of superoxide dismutase, catalase, glutathione peroxidase, and glutathione reductase in rat liver increased significantly (p < 0.05). Overall, lophirones B and C increased the expressions and activities of cytoprotective proteins in rat liver possibly through the reduction of cytoplasmic Keap1 expression, leading to the nuclear translocation of Nrf2.
机译:核红细胞相关因子2(Nrf2),一种氧化还原转录因子,在终止各种生化和分子过程的亲电子和活性氧的解毒中起关键作用。这使其成为多酚调节的候选者。这项研究调查查尔酮二聚体(lophirones B和C)诱导细胞保护酶的表达和活性的能力。查尔酮二聚体管理大鼠不仅诱导Nrf2,而且抑制细胞质的Kelch样ECH相关蛋白1(Keap1)的表达。此外,查尔酮二聚体显着(p <0.05)增加了大鼠肝中烟酰胺腺嘌呤二核苷酸的表达和活性,并减少了醌氧化还原酶-1,谷胱甘肽-S-转移酶,环氧化物水解酶和尿嘧啶葡萄糖醛酸糖基转移酶。同样,大鼠肝脏中的超氧化物歧化酶,过氧化氢酶,谷胱甘肽过氧化物酶和谷胱甘肽还原酶的活性显着增加(p <0.05)。总体而言,lophirones B和C可能通过减少细胞质Keap1表达来增加大鼠肝脏中细胞保护蛋白的表达和活性,从而导致Nrf2的核转运。

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