Objective To investigate the effect of drug resistance by arsenic trioxide (As 2O 3) and its possible mechanism in human breast cancer cell line MCF 7/ADM.

• 目的 探讨三氧化二砷 (As2 O3 )对人乳腺癌MCF 7/ADM细胞耐药性的逆转作用及其相关机制。