Differentiated 3T3-L1 adipocytes were incubated with piceatannol (0–50 μM) in the presence or absence of various concentration of MG132 (A, B), 10 mM 3-MA (C, D) and 10 μM CQ (E, F) in DMEM containing 1% fatty acid-free bovine serum albumin for 90 min. The medium was collected to measure the released glycerol (A, C, E) levels as described in the Experimental Section. Data are presented as means ± SEM. (n=3, *, p < 0.05). Total cellular proteins isolated from these cells were analyzed by Western blot analysis for ATGL, CGI-58, PLIN1 and β-actin (B, D, F).