Phytochemical screening, quantitative analysis of cyanidin-3-O-glucoside content, and anticancer activity of novel rice bran (Tubtim Chumphae rice)

The objective of this research was to explore the phytochemicals in Tubtim Chumphae rice bran and determine their potential antioxidant and anticancer activities. The rice bran extract contained total phenolics, flavonoids, and anthocyanins as the major compounds. In addition, it exhibited the highest DPPH(•), followed by ABTS(•)+, and FRAP radical scavenging activity. Moreover, the cytotoxic effect of the extract on Hep G2, SW620, KATO-III, BT474, and ChaGo-K-1 cancer cell lines was investigated; the obtained IC(50) values were 144.6 ± 0.39, 116.9 ± 0.68, 99.6 ± 0.10, 94.4 ± 0.33, and 25.6 ± 0.45 μg/mL, respectively. Overall, the abovementioned results suggest that rice bran extract has potent anticancer activity owing to the induction of cell death in cancer cell lines.