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http://dx.doi.org/10.3746/jkfn.2016.45.6.911

Inhibition of Cell Proliferation and Induction of Apoptosis by Ethanolic Extract of Lespedeza cuneata G. Don in Human Colorectal Cancer HT-29 cells  

Zhao, Qian (Department of Food and Nutrition, Kwangju Women's University)
Kim, Yeah-Un (Division of Food and Nutrition, Chonnam National University)
Han, In-Hwa (Department of Food and Nutrition, Kwangju Women's University)
Yun, Jung-Mi (Division of Food and Nutrition, Chonnam National University)
Publication Information
Journal of the Korean Society of Food Science and Nutrition / v.45, no.6, 2016 , pp. 911-917 More about this Journal
Abstract
Lespedeza cuneata G. Don is an edible perennial herb used in traditional Korean medicine. We investigated the anti-proliferative properties and mechanism of L. cuneata extract. The ethanolic extract of L. cuneata dose-and time-dependently inhibited human colorectal cancer cell proliferation. A 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-tetrazolium bromide (MTT) assay was used to test the effect of the extract on proliferation of HT-29 colorectal cancer cells. The extract inhibited HT-29 cell proliferation with an $IC_{50}$ value of $554.26{\pm}8.81{\mu}g/mL$. L. cuneata extract suppressed production of pro-inflammatory cytokines interleukin-6 and tumor necrosis $factor-{\alpha}$. Apoptosis was evaluated by analysis of DNA fragmentation, poly(ADP-ribose) polymerase cleavage, caspase-3 activity, and protein expression of pro-apoptotic (Bax) and anti-apoptotic (Bcl-2). Our results demonstrated that the extract induced DNA fragmentation and characteristic morphological changes associated with apoptosis in HT-29 colorectal cancer cells. The extract also time- and dose-dependently up-regulated expression of the Bax and down-regulated expression of the Bcl-2. Furthermore, the extract dose- and time-dependently enhanced caspase-3 activity. Our findings provide evidence that L. cuneata extract may mediate its anti-proliferative effect via modulation of apoptosis.
Keywords
Lespedeza cuneata G. Don; HT-29 colorectal cancer cells; apoptosis; antitumor activity; anti-inflammation;
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