Effect of polyphenol-rich plant extracts on IL-6 and MCP-1 secretion from preadipocytes exposed to H
. Cells were exposed to each plant extract (25 μM GAE) or treated with H2O2 (200 μM) in the presence or not of each plant extract (25 μM GAE) for 24 h. Then, levels of IL-6 (a) and MCP-1 (b) were measured by ELISA kits. Data are means ± SEM of three independent experiments. *: p < 0.05 as compared to H2O2.