Visceral fat tissues and liver tissues were collected and lysed in RIPA buffer. Nuclear protein was extracted from the liver tissues as previously described.18 (link) Western blot was performed as previously described.19 (link) β-actin was used as a loading control (Sigma-Aldrich, St. Louis, MO, USA). The primary antibodies including interleukin-6 (IL-6), the cell-bound precursor of tumor necrosis factor-α (TNF-α), adiponectin, nuclear factor-erythroid factor 2-related factor 2 (Nrf2), and heme oxygenase-1 (HO-1) were purchased from Abcam (Cambridge, MA). Histone-3 antibody was purchased from Cell Signaling Technology (Danvers, MA).