Abstract
Obesity, a metabolic disease linked to several other diseases, is emerging as a global problem. We determined the harvest time that maximized the anti-obesity effect by evaluating the inhibition of lipid accumulation in 3T3-L1 cells treated with fruits of Cornus officinalis. FS1 (pericarp + seeds, harvested 15 September) showed excellent anti-obesity activity (Oil Red O; 26.12 ± 1.37% vs. MDI) and inhibited the expression of PPAR-γ (0.05 ± 0.01 ford vs. MDI), C/EBPα (0.03 ± 0.02 ford vs. MDI), and C/EBPβ (0.33 ± 0.07 ford vs. MDI) at 200 μg/mL. The antioxidant activity of FS1 was also the most effective. In addition, FS1 contained higher levels of active ingredients than samples harvested in other periods. Especially, content of loganin, verbenalin, and sweroside was high. In terms of anti-obesity activity and functional components, immature COF (FS1) was the best, and these results indicate that it is necessary to adjust the harvest time, when used as an anti-obesity agent.
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