Abstract
Previously, several prenylated flavonoids having a C-8 lavandulyl moiety were found to inhibit cyclooxygenase-1 (COX-1) as well as 5-lipoxygenase (5-LOX), and sophoraflavanone G was the most potent inhibitor against these eicosanoid generating enzymes among 19 prenylated flavonoids tested. In this investigation, effects of sophoraflavanone G on COX-2 induction from RAW 264.7 cells andin vivo inflammatory response were studied. Sophoraflavanone G inhibited prostaglandin E2 (PGE2) production from lipopolysaccharide (LPS)-treated RAW cells by COX-2 down-regulation at 1-50 uM. Other prenylated flavonoids including kuraridin and sanggenon D also down-regulated COX-2 induction at 10-25 uM, while kurarinone and echinoisoflavanone did not. In addition, sophoraflavanone G showedin vivo anti-inflammatory activity against mouse croton oil-induced ear edema and rat carrageenan paw edema via oral (2-250 mg/kg) or topical administration (10-250 ug/ear). Although the potencies of inhibition were far less than that of a reference drug, prednisolone, this compound showed higher antiinflammatory activity when applied topically, suggesting a potential use for several eicosanoidrelated skin inflammation such as atopic dermatitis.
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Kim, D.W., Chi, Y.S., Son, K.H. et al. Effects of sophoraflavanone g, a prenylated flavonoid from sophoraFlavescens, on cyclooxygenase-2 andIn Vivo inflammatory response. Arch Pharm Res 25, 329–335 (2002). https://doi.org/10.1007/BF02976635
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DOI: https://doi.org/10.1007/BF02976635