11 September 2016 : Animal Research
Dimethoxy Curcumin Induces Apoptosis by Suppressing Survivin and Inhibits Invasion by Enhancing E-Cadherin in Colon Cancer CellsDong ChenAEG, Fang DaiA, Zhehang ChenF, Saisai WangCE, Xiaobin ChengB, Qinsong ShengD, Jianjiang LinA, Wenbin ChenAG
Med Sci Monit 2016; 22:3215-3222
BACKGROUND: Dimethoxy curcumin (DMC) is a kind of lipophilic analog of curcumin with great improvement in chemical and metabolic stability. DMC has been studied in breast and renal cancer, but no research in colon cancer has been found yet.
MATERIAL AND METHODS: Two colon cancer cells (HT-29 and SW480) and one normal human colon mucosal epithelial cell (NCM460) were used in this study. We studied the effect of DMC on the proliferation in vitro and in vivo. Transwell migration assay was used to estimate the inhibition of DMC on invasion. Moreover, the expressions of PARP, caspase-3, survivin and E-cadherin were detected to uncover the related signaling pathways by western blotting assay both in vitro and in vivo.
RESULTS: DMC significantly inhibited the growth of colon cancer cells in dose-dependent manner; IC50 for DMC was calculated to be 43.4, 28.2 and 454.8µM on HT-29, SW480 and NCM460. DMC significantly increased the apoptosis in both HT-29 (p=0.0051) and SW480 (p=0.0013) cells in vitro, and significantly suppressed the growth of both cell lines in vivo. Moreover, DMC reduced the number of migrated cells in both HT-29 (p=0.007) and SW480 (p=0.004) cells. By western blotting analysis, the cleavage of pro-caspases-3 and PARP were clearly induced by DMC to their active form, while the expression of survivin was reduced and E-cadherin was enhanced in both cells in vitro and in vivo.
CONCLUSIONS: DMC may exert an effective anti-tumor effect in colon cancer cells by down-regulating survivin and upregulating E-cadherin.
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