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http://dx.doi.org/10.5352/JLS.2021.31.3.266

Inhibition of Cell Growth by Anoikis in Various Human Cancer Cell Lines Treated with an Extract of Smilax china L.  

Kim, Min-Jae (Department of Biology Education, Gyeongsang National University)
Kim, Hyeon-Ji (Department of Biology Education, Gyeongsang National University)
Kim, Moo-Gyeong (Department of Biology Education, Gyeongsang National University)
Lee, Sung-Ho (Division of Life Science, Gyeongsang National University)
Jeon, Byeong-Gyun (Department of Biology Education, Gyeongsang National University)
Publication Information
Journal of Life Science / v.31, no.3, 2021 , pp. 266-279 More about this Journal
Abstract
The present study examined the cytotoxic effects of a Smilax china L. extract (SCLE) in human cancer (A-549, MCF-7, MDA-MB-231, U87-MG, AGS, MKN-74, and SNU-601) and normal MRC-5 fibroblasts, as well as in mesenchymal stem cells derived from dental tissue (DSC). The 50% inhibitory concentration (IC50) values for SCLE were significantly (p<0.05) lower in the cancer cell lines (A-549, MCF-7, MDA-MB-231, U87-MG, AGS, MKN-74 and SNU-601) than in the MRC-5 and DSC cells. Cell growth was significantly (p<0.05) more inhibited in the cancer cell lines treated with 200 ㎍/ml SCLE than in the normal MRC-5 and DSC, and anoikis-like floating cell morphology was observed in the SCLE-treated cancer cells. The cells detached by SCLE treatment were retrieved daily and assayed for viability and telomerase activity. Cells retrieved at 4 days showed significantly decreased viability and telomerase activity (p<0.05), as well as apoptosis-like abnormal morphology, when compared to cells retrieved in the previous 3 days. The ratio of apoptosis and cells in the G1 phase was significantly (p<0.05) increased in the A-549, AGS, and MCF-7 cancer cells treated with SCLE for 4 days compared to untreated controls. However, after SCLE treatment, cell adhesion was not increased by application of an inhibitor of the associated protein kinase (ROCK) that mainly contributes to the increase in cell attachment. This suggests that the cellular detachment by SCLE is probably controlled by a Rho-independent mechanism(s). These observations indicate that SCLE readily induces anoikis in cancer cells and could serve as a potent agent for cancer chemotherapy.
Keywords
Anoikis; cancer cells; human; Smilax china L. extract;
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