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Int J Mol Sci. 2015 Apr 30;16(5):9976-97. doi: 10.3390/ijms16059976.

Sasa quelpaertensis Leaf Extract Inhibits Colon Cancer by Regulating Cancer Cell Stemness in Vitro and in Vivo.

Author information

1
Department of Nutritional Science and Food Management, Ewha Womans University, Seoul 120-750, Korea. 009267@naver.com.
2
Department of Nutritional Science and Food Management, Ewha Womans University, Seoul 120-750, Korea. godlovesme86@hanmail.net.
3
National Academy of Agricultural Science, Rural Development Administration, Jeollabuk-do 565-851, Korea. kimhrr@korea.kr.
4
Department of Biology, Jeju National University, Jejusi, Jeju 690-756, Korea. jejusasa@naver.com.
5
Department of Nutritional Science and Food Management, Ewha Womans University, Seoul 120-750, Korea. yuri.kim@ewha.ac.kr.

Abstract

A rare subpopulation of cancer cells, termed cancer stem cells (CSCs), may be responsible for tumor relapse and resistance to conventional chemotherapy. The development of a non-toxic, natural treatment for the elimination of CSCs is considered a strategy for cancer treatment with minimal side effects. In the present study, the potential for Sasa quelpaertensis leaf extract (SQE) and its two bioactive compounds, tricin and p-coumaric acid, to exert anti-CSC effects by suppressing cancer stemness characteristics were evaluated in colon cancer cells. CD133+CD44+ cells were isolated from HT29 and HCT116 cell lines using flow-activated cell sorting (FACs). SQE treatment was found to significantly suppress the self-renewal capacity of both cell lines. SQE treatment was also associated with the down-regulation of β-catenin and phosphorylated GSK3β, while significantly enhancing cell differentiation by up-regulating CK20 expression and blocking the expression of several stem cell markers, including DLK1, Notch1, and Sox-2. In vivo, SQE supplementation suppressed tumor growth in a xenograft model by down-regulating stem cell markers and β-catenin as well as HIF-1α signaling. Compared with two bioactive compounds of SQE, SQE exhibited the most effective anti-CSC properties. Taken together, these results provide evidence that SQE inhibits colon cancer by regulating the characteristics of CSCs.

PMID:
25941936
PMCID:
PMC4463628
DOI:
10.3390/ijms16059976
[Indexed for MEDLINE]
Free PMC Article

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