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http://dx.doi.org/10.5352/JLS.2017.27.5.545

Antioxidative and Anticancer Activities of Julbernardia globiflora Extract in Human Colon Adenocarcinoma HT29 Cells  

Oh, You Na (Blue-Bio Industry Regional Innovation Center, Dong-Eui University)
Jin, Soojung (Blue-Bio Industry Regional Innovation Center, Dong-Eui University)
Kwon, Hyun Ju (Blue-Bio Industry Regional Innovation Center, Dong-Eui University)
Kim, Byung Woo (Blue-Bio Industry Regional Innovation Center, Dong-Eui University)
Publication Information
Journal of Life Science / v.27, no.5, 2017 , pp. 545-552 More about this Journal
Abstract
Julbernardia globiflora, a tropical African tree widespread in Miombo woodland, has been used in folk medicine for the treatment of depression and stomach problems. However, the antioxidative and anticancer activities of J. globiflora remain unclear. The objective of this study is to evaluate the antioxidative and anticancer effects of methanol extract of J. globiflora (MEJG) and the molecular mechanism of its anticancer activity in human colon carcinoma HT29 cells. MEJG exhibited significant antioxidative effect with an $IC_{50}$ (concentration at 50% inhibition) value of $1.23{\mu}g/ml$ measuring by 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging assay and inhibited cell proliferation in a dose-dependent manner in HT29 cells. We found that MEJG induced apoptosis of HT29 cells with the increase of apoptotic cells and apoptotic bodies using Annexin V staining and 4,6-diamidino-2-phenylindole (DAPI) staining, respectively. The MEJG treatment showed the increase of Fas, a death receptor, and Bax, a pro-apoptotic protein, and the decrease of Bcl-2, an anti-apoptotic protein, resulting in the release of cytochrome c from the mitochondria into the cytosol and activation of caspase-3, -8 and -9. The apoptotic effects of MEJG were confirmed by cleavage of poly (ADP-ribose) polymerase (PARP). Collectively, these results suggest that MEJG may exert the anticancer effect in HT29 cells by inducing apoptosis via both the intrinsic and extrinsic pathways.
Keywords
Anticancer; antioxidative; apoptosis; caspase; Julbernardia globiflora;
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