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Kohji Yamaki,Herath Mudiyanselage Theja Herath,Yuko Takano-Ishikawa 한국식품영양과학회 2003 Journal of medicinal food Vol.6 No.4
Certain naturally occurring flavonoids affect immunoregulatory activities in vitroand in vivoagainst cytokineproduction. Since tumor necrosis factor (TNF)-a is one of the major inflammatory cytokines, the effects of various dietaryflavonoids on TNF-a production in lipopolysaccharide (LPS)-stimulated J774.1 cells were evaluated in vitro. Flavones,flavonols, and chalcone are the most potent inhibitors of production of TNF-a. Flavanone, naringenin, anthocyanidin, pelargo-din, and cyanidin exhibit moderate inhibitory activity. In contrast, genistein isoflavone displays weak inhibition, while eri-odictyol flavanone is inactive. It is clear that the double bond between carbons 2 and 3 and the ketone group at position 4 offlavonoids are necessary for potent inhibitory effect. The difference in inhibitory action appears to depend on the categorizedsubclass of flavonoids.