ABSTRACT
This study was designed to prove simultaneously blocking both EGFR and COX-2-medi-ated pathways may be an efficient means of inhibiting cancer cell growth in NPC. Method: A combination of tarceva (EGFR-selectivetyrosine kinase inhibitors) with celecoxib(Cox-2 inhibitor) was studied on its effects on cell growth, cell cycle progression, apoptosis and protein expression in CNE-2 cell lines by cell growth assay, flow cy-tometric analysis assay and Western blotting. Result: ①The inhibition rate of cell growth was higher in the group treated with a combination of two agents than that the sum of rates of the two groups treated with only one agent (P0.05). ③The group of combination showed less expressions of p-EGFR and COX-2 than any other group. Conclusion Simultaneously blocking EGFR and COX-2 mediated pathways would significantly in-hibit the growth of CNE-2 cell line, increase G_1 arrest and reduce the expression levels of p-EGFR and COX-2.