Objective To investigate the effect of Polysaccharide extracted from Curculigo Orchioides Gaertn(COP) on several active factors in RAW264.7 cells and explore the partial mechanism of how COP activates macrophages.Methods Macrophages co-culture with COP for 36h in vitro.TNF-α and IL-1 production of the cells induced by COP were measured by ELISA.NO production in supernatant was measured by Griess reagent.Results Compared with normal control group,COP significantly increased TNF-α、IL-1和NO production (P〈0.05 or P〈0.01)in 125.00 and 62.50...