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Curcumin inhibits proliferation of NPC cells. (A) Human CNE2 and HNE2 NPC cells were treated with increased concentrations of curcumin and indicated for 48 h (A) or at the concentration of 40 μM for up to 72 h (B). Afterwards, cell proliferation was determined by MTT assays. The data are presented as mean ± SD of three separate experiments. *P<0.05 indicates significant difference as compared to the untreated control group.
