Abstract
The present study was designed to evaluate the anticancer effects of withaferin A against the human endometrial cancer via modulation of transforming growth factor-β (TGF-β) signalling. The results of the present study revealed that withaferin A exerts a dose and time-dependent antiproliferative effects against the human KLE endometrial cancer cells with comparatively lower toxicity against the THESCs normal cells. The IC50 of withaferin A against the KLE endometrial cancer cells was found to 10μM. The results showed that withaferin A induced apoptosis and G2/M cell cycle arrest of the KLE cells which was associated with alteration of the apoptosis and cell cycle related proteins. In addition, the transwell assays showed that the migration and invasion of the KLE cells were inhibited by 53 and 40%, respectively. Finally, the effects of withaferin A were also examined on the TGF-β signalling pathway. The results showed that withaferin A blocked TGF-β-dependent Smad2 phosphorylation and expression of other TGF-β-related proteins in KLE cells. Summing up, the results suggest that withaferin A inhibits the proliferation of the human endometrial carcinoma via TGF-β signalling.
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