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

doi:10.1021/acs.jafc.8b00437

CNU IR > Pharmacy and Science > Dept. of Biotechnology (including master's program) > Periodical Articles > Item 310902800/32159

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Title:	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
Authors:	Wu, Pei-Shan Ding, Hsiou-Yu Yen, Jui-Hung Chen, Shu-Fen Lee, Kuan-Han Wu, Ming-Jiuan
Contributors:	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
Keywords:	8-hydroxydaidzein Nrf2 Akt NF-kappa B COX-2
Date:	2018-06-13
Issue Date:	2019-11-15 15:43:11 (UTC+8)
Publisher:	AMER CHEMICAL SOC
Abstract:	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.
???metadata.dc.relation.uri???:	http://dx.doi.org/10.1021/acs.jafc.8b00437
Relation:	Journal of Agricultural and Food Chemistry, v.66, n.23, pp.5790-5801
Appears in Collections:	[Dept. of Biotechnology (including master's program)] Periodical Articles [Dept. of Cosmetic Science and institute of cosmetic science] Periodical Articles [Dept. of Health and Nutrition (including master's program)] Periodical Articles [Dept. of Pharmacy] Periodical Articles

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