Heme oxygenase 1 mediates anti-inflammatory effects of 2',4',6'-tris(methoxymethoxy) chalcone.
We report that the synthetic chalcone 2',4',6'-tris(methoxymethoxy) chalcone (TMMC) is an anti-inflammatory compound that reduces nitric oxide (NO) production by inhibiting of inducible NO synthase (iNOS) expression, and that TMMC decreases the degradation of the inhibitory factor kappaB, leading to inhibition of nuclear factor-kappaB translocation into the nucleus in lipopolysaccharide (LPS)-activated RAW 264.7 macrophages. We also demonstrate that TMMC by itself is a potent inducer of heme oxygenase 1 (HO-1). Inhibition of HO-1 activity or scavenging of carbon monoxide, a byproduct of heme degradation, significantly attenuated this anti-inflammatory action. Treating cells with the specific p42/44 MAPK inhibitor, PD98059, blocked the TMMC-mediated induction of HO-1 and the inhibition of LPS-stimulated expression of iNOS. TMMC also depleted intracellular GSH. Our data suggest that TMMC exerts an anti-inflammatory effect in macrophages through a mechanism that involves the induction of HO-1, which is mediated by activation of p42/44 MAPK and GSH depletion.
College of Pharmacy, Medicinal Resources Research Institute, Wonkwang University, Iksan, Jeonbuk 570-749, South Korea.
Sung Hee
SH
Lee
Geom Seog
GS
Seo
Ji Yeong
JY
Kim
Xing Yu
XY
Jin
Hee-Doo
HD
Kim
Dong Hwan
DH
Sohn
D000704:Analysis of Variance; D000818:Animals; D000893:Anti-Inflammatory Agents / Q000737:chemistry / Q000494:pharmacology; D015152:Blotting, Northern; D015153:Blotting, Western; D002460:Cell Line; D047188:Chalcones / Q000737:chemistry / Q000494:pharmacology*; D004305:Dose-Response Relationship, Drug; D004791:Enzyme Inhibitors / Q000494:pharmacology; D005419:Flavonoids / Q000494:pharmacology; D015870:Gene Expression / Q000187:drug effects; D005978:Glutathione / Q000378:metabolism; D051547:Heme Oxygenase-1 / Q000235:genetics / Q000378:metabolism*; D007093:Imidazoles / Q000494:pharmacology; D007424:Intracellular Fluid / Q000187:drug effects / Q000378:metabolism; D008070:Lipopolysaccharides / Q000494:pharmacology; D008262:Macrophage Activation / Q000187:drug effects; D008264:Macrophages / Q000166:cytology / Q000187:drug effects* / Q000378:metabolism; D020928:Mitogen-Activated Protein Kinases / Q000037:antagonists & inhibitors / Q000378:metabolism; D015394:Molecular Structure; D016328:NF-kappa B / Q000378:metabolism; D009569:Nitric Oxide / Q000096:biosynthesis; D052247:Nitric Oxide Synthase Type II / Q000235:genetics / Q000378:metabolism; D011725:Pyridines / Q000494:pharmacology; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D017382:Reactive Oxygen Species / Q000378:metabolism
C510589:2',4',6'-tris(methoxymethoxy) chalcone; D000893:Anti-Inflammatory Agents; D047188:Chalcones; D004791:Enzyme Inhibitors; D005419:Flavonoids; D007093:Imidazoles; D008070:Lipopolysaccharides; D016328:NF-kappa B; D011725:Pyridines; D012333:RNA, Messenger; D017382:Reactive Oxygen Species; D009569:Nitric Oxide; D052247:Nitric Oxide Synthase Type II; D051547:Heme Oxygenase-1; D020928:Mitogen-Activated Protein Kinases; D005978:Glutathione; C093642:SB 203580; C093973:2-(2-amino-3-methoxyphenyl)-4H-1-benzopyran-4-one