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    Please use this identifier to cite or link to this item: http://ir.cnu.edu.tw/handle/310902800/32159


    標題: Anti-inflammatory Activity of 8-Hydroxydaidzein in LPS-Stimulated BV2 Microglial Cells via Activation of Nrf2-Antioxidant and Attenuation of Akt/NF-KB-Inflammatory Signaling Pathways, as Well As Inhibition of COX-2 Activity
    作者: Wu, Pei-Shan
    Ding, Hsiou-Yu
    Yen, Jui-Hung
    Chen, Shu-Fen
    Lee, Kuan-Han
    Wu, Ming-Jiuan
    貢獻者: Chia Nan Univ Pharm & Sci, Dept Biotechnol
    Chia Nan Univ Pharm & Sci, Dept Cosmet Sci
    Chia Nan Univ Pharm & Sci, Dept Hlth & Nutr
    Chia Nan Univ Pharm & Sci, Dept Pharm
    Tzu Chi Univ, Dept Mol Biol & Human Genet
    關鍵字: 8-hydroxydaidzein
    Nrf2
    Akt
    NF-kappa B
    COX-2
    日期: 2018-06-13
    上傳時間: 2019-11-15 15:43:11 (UTC+8)
    出版者: AMER CHEMICAL SOC
    摘要: It was demonstrated that isoflavones can cross the blood brain barrier, making them desirable candidate agents for the prevention of neurological symptoms. 8-Hydroxydaidzein (8-OHD, 4',7,8-trihydoxyisoflavone) is an isoflavone found only in fermented soy food. Current results showed that 8-OHD inhibited LPS-stimulated production of nitric oxide (NO) and proinflammatory cytokines, such as tumor necrosis factor (TNF)-alpha and interleukin (IL)-6, by inhibiting gene expression in BV2 microglial cells. Moreover, 8-OHD markedly quenched reactive oxygen species (ROS) and activated NF-E2-related factor 2 (Nrf2) so as to upregulate expression of Phase II enzymes, including heme oxygenase (HO)-1, NAD(P)H quinone dehydrogenase 1 (NQO1), and the modifier subunit of glutamate cysteine ligase (GCLM). 8-OHD also suppressed LPSstimulated phosphorylation of Akt and NF-kappa B-p65. The anti-inflammatory activity of 8-OHD was attenuated by the HO-1 inhibitor zinc protoporphyrin (Znpp) but augmented by the PI3K/Akt inhibitor LY294002. 8-OHD also diminished LPSinduced prostaglandin E-2 (PGE(2)) production without affecting cyclooxygenase (COX)-2 expression. In vitro assay shows that 8-OHD displayed mixed-type inhibition of COX-2 with an IC50 of 8.9 +/- 1.2 M. These data suggest that the anti-inflammatory activity of 8-OHD may be associated with the activation of Nrf2/HO-1 and attenuation of Akt/NF-kappa B signaling pathways as well as inhibition of COX-2 enzyme activity. In conclusion, 8-OHD, a potent Nrf2 activator, Akt/NF-kappa B activation suppressor, and COX-2 enzyme inhibitor, may have health-promoting effects for mitigating microglia activation and preventing neuroinflammation.
    link: http://dx.doi.org/10.1021/acs.jafc.8b00437
    Appears in Collections:[生物科技系(所)] 期刊論文
    [化妝品應用與管理系(所)] 期刊論文
    [保健營養系(所) ] 期刊論文
    [藥學系(所)] 期刊論文

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