Abstract
Pyrazolone complexes have strong bio-activity but the anti-tumor mechanism of pyrazolone-based metal complexes is not fully understood. In this study, the inhibitory effect and possible mechanism of a novel pyrazolone-based derivative compound (Cd–PMPP-SAL) on human esophageal cancer cells were investigated. We found that Cd–PMPP-SAL inhibited the proliferation of Eca-109 cells in a dose-dependent manner and induced the apoptosis in the cells. Interestingly, Cd–PMPP-SAL promoted the production of ROS, loss of mitochondrial membrane potential, PARP cleavage and activation of caspase-3/9. These results suggest Cd–PMPP-SAL-induced apoptosis might be mediated by the increased production of ROS and caspase-dependent mitochondria-mediated pathway. These results suggest that Cd–PMPP-SAL is a potential candidate for the treatment of esophageal cancer.
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