Effects of SMI on cellular accumulation of ADR or PTX in colon cancer cells. (A, B) Effects of SMI (1, 1.5, and 2 μL/mL) on cellular accumulation of ADR (5 μmol/L) in Caco-2 and LoVo cells. (C, D) Effects of SMI (1, 1.5, and 2 μL/mL) on cellular accumulation of PTX (5 μmol/L) in Caco-2 and LoVo cells. Data are presented as the mean±SD from five independent experiments. *P<0.05, **P<0.01 vs the control group.