Abstract
Di-2-pyridylketone-4,4-dimethyl-3-thiosemicarbazone (Dp44mT), as the novel iron chelator, has been reported to inhibit the tumorigenesis and progression of various cancer cells. However, whether Dp44mT has anticancer effects in colon cancer cells is still unknown. Here, we investigated the antitumor action of Dp44mT in colon cancer and its underlying mechanisms, and the connections between Dp44mT and N-myc downstream-regulated genes 1(Ndrg1). We used cell viability, migration and invasion assay, flow cytometry, western blot and qRT-PCR to examine the anticancer effects of Dp44mT and Ndrg1. We found that Dp44mT suppressed cell viability, migration, invasion and induced apoptosis of colon cancer cells and over-expression of Ndrg1 also suppressed cell viability, migration, invasion and induced apoptosis of colon cancer cells. Dp44mT attenuated the TGF-β1-induced EMT in colon cancer cells, and Dp44mT could up-regulate Ndrg1 expression level. Overexpression of Ndrg1 attenuates the TGF-β1-induced EMT, Dp44mT and Ndrg1 suppressed EMT through activation of Wnt/β catenin signaling pathway. In conclusion, our data demonstrated that Dp44mT/Ndrg1 have effective anticancer capability in colon cancer cells and that may represent a promising treatment strategy for human colon cancer.
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