Pedunculoside is a triterpene saponin extracted from Ilex rotunda Thunb. Pedunculoside regulates PPAR-γ, CCAAT/Enhancer-binding Protein α(C/EBPα)、and SREBP-1 expression as well as inhibited phosphorylation of AMPK in MDI (methylisobutylxanthine, dexamethasone, insulin) induced-3T3L1 cells.