Objective To research the influences of celecoxib combined with pyrrolidine dithiocarbamate( PDTC) on proliferation and apoptosis of colon cancer cell HT-29 and on gene expressions of COX-2,NF-kappaB,Caspase-3 and explore its potential mechanism of anti-tumor effect. Methods The human colon cancer cells were dealt by different concentrations of celecoxib alone( single-drug group) or celecoxib combined with different concentrations of PDTC( combination group). The proliferation of the cells was assayed by CC...