Yacon (Smallanthus sonchifolius) tubers and leaves have been used widely as foodstuff and as remedy for urinary ailments, muscle pain, hyperlipidemia and diabetes mellitus. Recent studies have investigated on isolating active components for their anti-cancer potential against melanoma, cervical cancer and colon cancer. In this study, the cytotoxicity potential of hexane, methanol and DCM extracts of yacon leaves was assessed against MCF-7 (breast cancer), HT-29 (colon cancer) and HDFn (normal human dermal fibroblast) cell lines by using AlamarBlue® assay. Results showed significant reduction in cellular viability of MCF-7 cell lines caused by hexane, methanol and DCM extracts in a dose dependent manner, with DCM being the most potent. The DCM extract also produced significant cytotoxic activity against HT-29 cells, with IC50 lower than 5-fluorouracil. Effect on HDFn showed that three yacon extracts produced significantly lower cytotoxicity compared to drug controls with the DCM extract showing the least toxicity.
Key words: Yacon, alamar, breast, colon, cancer, MCF-7, HT-29..
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