Analysis of the mRNA expression levels of cytokines in RAW264.7 macrophages stimulatd by rGSTO2 protein. Total RNA was extracted from macrophages with rGSTO2 alone or co-incubated with LPS for 24 h, then the mRNA expressions of IL-6, IL-10, Il-12, IL-1β, INF-γ, TNF-α and TGF-β were detected by real-time PCR, respectively. The significance level was set at *p < 0.05, **p < 0.01 and ***p < 0.001 as compared to the control group. All data were expressed as means ± SD (n = 3).