Figure 2 The dose‐dependent response of growth inhibition in two colon cancer cell lines treated with 15‐deoxy‐δ(12,14)‐prostaglandin J2 (15d‐PGJ2) for 48 h. Growth inhibition was determined using an MTT assay and shown as inhibitory rate. Each value presented as mean (SD) of triplicate experiments.*p<0.05, **p<0.01, compared with untreated group.