The Anti-oxidative and Anti-inflammatory Effects of Caffeoyl Derivatives from the Roots of <i>Aconitum koreanum</i> R. R<small>AYMOND</small>

다국어 초록 (Multilingual Abstract)

<P>Activity guided fractionation of <I>Aconitum koreanum</I> root extract (RAK), a traditional medicine in Korea, afforded four caffeoyl derivatives, caffeic acid (1), 4,5-dicaffeoylquinic acid (2), 3,5-dicaffeoylquinic acid (3) and 3,5-dicaffeoylquinic acid methyl ester (4). In order to evaluate the anti-oxidative and anti-inflammatory effects of these compounds, their 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activities and abilities to inhibit nitric oxide (NO) production in lipopolysaccharide (LPS)-stimulated RAW 264.7 were examined. And the protein and mRNA levels of inducible nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2) in LPS-stimulated HaCaT cells were also quantified by Western blotting and reverse transcription-polymerase chain reaction (RT-PCR). Compounds (1—4) showed potent DPPH radical scavenging and NO inhibitory activities as compared with positive controls (<SMALL>L</SMALL>-ascorbic acid and <I>N</I>(G)-monomethyl-<SMALL>L</SMALL>-arginine (<SMALL>L</SMALL>-NMMA), respectively). Also, these compounds dose-dependently inhibited the expressions of iNOS and COX-2 as well as their mRNA levels.</P>