Comparison of suppressive effects of demethoxycurcumin and bisdemethoxycurcumin on expressions of inflammatory mediators in vitro and in vivo.
Demethoxycurcumin and bisdemethoxycurcumin are the main active ingredients isolated from Curcumae Longae Radix. Recent studies demonstrated that both compounds exhibit antioxidative and anti-inflammatory effects as well as effects on cancer cell lines. In this study, we compared the activities of demethoxycurcumin and bisdemethoxycurcumin, and both compounds were evaluated on lipopolysaccharide (LPS)-induced nitric oxide (NO) production, inducible nitric oxide synthase (iNOS), cycloxygenase-2 (COX-2) and nuclear factor-kappaB (NF-kappaB) activity in a RAW 264.7 macrophage cell line. The evaluation:results suggested that the anti-inflammatory properties of demethoxycurcumin and bisdemethoxycurcumin were attributed to the inhibition of iNOS and COX-2 expression, as initiated by the inhibition of NF-kappaB activity. Additionally, both of them significantly inhibited carrageenan-induced paw edema in mice. Taken together, all of the results showed that the suppressive effect of demethoxycurcumin was stronger than that of bisdemethoxycurcumin, indicating that the methoxy group had enhanced demethoxycurcumin's anti-inflammation effects.
Guo
Lian Yu
LY
Natural Products Research Institute, College of Pharmacy, Seoul National University, San 56-1. Sillim-Dong, Gwanak-Gu, Seoul, Korea.
Cai
Xing Fu
XF
Lee
Jung Joon
JJ
Kang
Sam Sik
SS
Shin
Eun Myoung
EM
Zhou
Hong Yu
HY
Jung
Ji Won
JW
Kim
Yeong Shik
YS
D000818:Animals; D000893:Anti-Inflammatory Agents / Q000494:pharmacology* / Q000627:therapeutic use; D002351:Carrageenan; D002460:Cell Line; D003474:Curcumin / Q000031:analogs & derivatives* / Q000494:pharmacology / Q000627:therapeutic use; D051546:Cyclooxygenase 2 / Q000235:genetics / Q000378:metabolism; D036381:Diarylheptanoids; D004195:Disease Models, Animal; D004305:Dose-Response Relationship, Drug; D004487:Edema / Q000139:chemically induced / Q000378:metabolism / Q000517:prevention & control*; D015971:Gene Expression Regulation, Enzymologic / Q000187:drug effects; D020672:I-kappa B Proteins / Q000378:metabolism; D018836:Inflammation Mediators / Q000378:metabolism*; D008070:Lipopolysaccharides / Q000494:pharmacology; D008264:Macrophages / Q000187:drug effects* / Q000201:enzymology / Q000378:metabolism; D051379:Mice; D000072000:NF-KappaB Inhibitor alpha; D016328:NF-kappa B / Q000235:genetics / Q000378:metabolism; D009569:Nitric Oxide / Q000378:metabolism; D052247:Nitric Oxide Synthase Type II / Q000235:genetics / Q000378:metabolism; D010766:Phosphorylation; D014162:Transfection
D000893:Anti-Inflammatory Agents; D036381:Diarylheptanoids; D020672:I-kappa B Proteins; D018836:Inflammation Mediators; D008070:Lipopolysaccharides; D016328:NF-kappa B; C000606205:Nfkbia protein, mouse; D000072000:NF-KappaB Inhibitor alpha; C034786:bisdemethoxycurcumin; D009569:Nitric Oxide; D002351:Carrageenan; D052247:Nitric Oxide Synthase Type II; C496317:Nos2 protein, mouse; C077623:Ptgs2 protein, mouse; D051546:Cyclooxygenase 2; D003474:Curcumin; C050229:demethoxycurcumin