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Icariin decreased IL-1β (B), IL-6 (C) and TNF-α (D) level but increased IFN-γ (A) level in serum of asthmatic rats. IFN-γ, IL-1β, IL-6 and TNF-α level in serum were analyzed by ELISA assay. *p < 0.05, **p< 0.01 and ***p < 0.001 vs NC group; #p < 0.05 and ## p < 0.01 vs A group.
