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• W2024407775 abstract "2-Methyl-2-(2-methylpropenyl)-2,3-dihydronaphtho[2,3-b]furan-4,9-dione (NFD-37) is a synthetic furonaphthoquinone compound. In the present study, the NFD-37 compound was found to inhibit prostaglandin (PG) E2 production in lipopolysaccharide (LPS)-stimulated macrophages RAW 264.7. NFD-37 compound exhibited a preferred inhibition on enzyme activity of cyclooxygenase (COX)-2 over COX-1. Further, NFD-37 compound attenuated LPS-induced synthesis of both mRNA and protein of COX-2, and suppressed LPS-induced COX-2 promoter activity in the macrophages, indicating that the furonaphthoquinone compound could down-regulate LPS-induced COX-2 expression at the transcription level. Even though COX-2 promoter behaves as a sophisticated biosensor for host defense, nuclear factor (NF)-κB activation has been evidenced to play a major mechanism for LPS-induced COX-2 expression in macrophages. NFD-37 compound exhibited a dose-dependent inhibitory effect on LPS-induced phosphorylation of inhibitory κBα (IκBα) protein, and subsequently inhibited IκBα degradation, DNA binding activity of NF-κB complex as well as NF-κB transcriptional activity in macrophages RAW 264.7. In another experiment, NFD-37 compound inhibited both COX-2 promoter activity and GST-IκBα phosphorylation elicited by an expression vector encoding IκB kinase β. Taken together, NFD-37 compound inhibited enzyme activity of COX-2 but also suppressed COX-2 expression depending on NF-κB activation, and thus could provide an invaluable tool to investigate pharmacological potential in the excess PG-related disorders." @default.
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• W2024407775 date "2005-10-01" @default.
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• W2024407775 title "Dual inhibitory effects of furonaphthoquinone compound on enzyme activity and lipopolysaccharide-induced expression of cyclooxygenase-2 in macrophages" @default.
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• W2024407775 doi "https://doi.org/10.1016/j.bbrc.2005.08.059" @default.
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