Serum contents of C-reaction protein (CRP), interferon gamma (IFN-γ), tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6), interleukin-1β (IL-1β), resistin, nitric oxide (NO) and suppressor of cytokine signaling 3 (SOCS3) in the normal group (N), model group (M), and groups gavaged with metformin (P), scutellaria Radix (SR), coptidis Rhizome (CR), low dose of combined extracts group (LSC) and high dose of combined extracts (HSC). The values were shown as mean ± SD. # p < 0.05, ## p < 0.01, ### p < 0.001 vs. normal group; * p < 0.05, ** p < 0.01, *** p < 0.001 vs. model group. Data were analyzed by One-way-ANOVA.