Anti-proliferative effect of MRB in human colorectal cancer cells (HCT116, LoVo and SW480) (A), breast cancer cells (MDA-MB-231 and MCF-7) (B), hepatocellular carcinoma cells (HepG-2) (C) and normal colon cells (CCD-18co) (D). The cells were plated overnight and then treated with MRB. Cell proliferation was measured using MTT assay as described in Materials and methods. ∗P < 0.05 compared to cell without MRB treatment