The rhizomes of Hedychium coronarium have been used for the treatment of inflammation, skin diseases, headache, and sharp pain due to rheumatism in traditional medicine.
METHODS AND RESULTS:
From this plant, three new labdane-type diterpenes 1-3, named coronarins G-I as well as seven known 4-10, coronarin D, coronarin D methyl ether, hedyforrestin C, (E)-nerolidol, β-sitosterol, daucosterol, and stigmasterol were isolated. Their chemical structures were elucidated by mass, 1D- and 2D-nuclear magnetic resonance spectroscopy. They were evaluated for inhibitory effects on lipopolysaccharide-stimulated production of pro-inflammatory cytokines in bone marrow-derived dendritic cells. Among of them, compounds 1, 2, and 6 were significant inhibitors of LPS-stimulated TNF-α, IL-6, and IL-12 p40 productions with IC(50) ranging from 0.19±0.11 to 10.38±2.34 μM. The remains of compounds showed inactivity or due to cytotoxicity.
CONCLUSIONS:
These results warrant further studies concerning the potential anti-inflammatory benefits of labdane-type diterpenes from H. coronarium. |