Fig. 5.

Melatonin-activated PKA and ERK1/2 mediate lipolysis in porcine intramuscular preadipocytes. A–J: Fully differentiated adipocytes were treated with control, 1 mM of melatonin, and 1 mM of melatonin plus 10 μM of 4-P-PDOT for 24 h. The expression levels of PKA (A, B), ERK1/2 (C, D), HSL (E, F), PLIN1 (G, H), and ATGL (I, J) and the phosphorylation levels of PKA (p-PKA Thr197) (A, B), ERK1/2 (p-ERK1/2 Thr202/Tyr204) (C, D), HSL (pHSL Ser660) (E, F), PLIN1 (p-PLIN1 Ser522) (G, H), and α-tubulin (I, J) were evaluated by Western blotting. The results are represented as the mean ± SEM (*P < 0.05; **P < 0.01; ***P < 0.001; n = 3).