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High-Polyphenol Sorghum Bran Extract Inhibits Cancer Cell Growth Through ROS Induction, Cell Cycle Arrest, and Apoptosis.
Journal of Medicinal Food 2018 May 8
As diet is one of the major controllable factors in cancer development, potentially chemopreventive foods are of significant interest to public health. One such food is sorghum (Sorghum bicolor), a cereal grain that contains varying concentrations of polyphenols. In a panel of 15 sorghum germplasm, we identified strains with higher polyphenol content than previously reported for this grain. Bran extracts from the germplasm with the highest and lowest polyphenol content were then tested against HepG2 and Caco2 cancer cells to assess effects on cancer cell viability, reactive oxygen species, apoptosis, DNA damage, cell cycle arrest, and protein expression patterns. High-polyphenol extracts, but not low-polyphenol extracts, reduced cell viability by inducing apoptosis and cell cycle arrest following production of reactive oxygen species and oxidative DNA damage. The results indicate that high-polyphenol sorghum bran extracts have potential anticancer properties and warrant further research, not only to test against specific cancers but also to elucidate underlying mechanisms of action.
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