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Comparison of the effect of chemical composition of anthocyanin-rich plant extracts on colon cancer cell proliferation and their potential mechanism of action using in vitro, in silico, and biochemical assays
- Mazewski, Candice, Liang, Katie, Gonzalez de Mejia, Elvira
- Food chemistry 2018 v.242 pp. 378-388
- anthocyanins, apoptosis, beans, binding capacity, black rice, carrots, cell proliferation, chemical composition, colorectal neoplasms, grapes, humans, inhibitory concentration 50, lentils, mechanism of action, neoplasm cells, peanuts, phenolic compounds, phosphotransferases (kinases), plant extracts, pro-apoptotic proteins, sweet potatoes, tyrosine, wheat
- The objective was to compare the anti-proliferative effect of anthocyanin-rich plant extracts on human colon cancer cells and determine their mechanism of action. Eleven extracts were tested: red (RG) and purple grape, purple sweet potato, purple carrot, black and purple bean, black lentil (BL), black peanut, sorghum (SH), black rice, and blue wheat. HCT-116 and HT-29 inhibition correlated with total phenolics (r=0.87 and 0.77, respectively), delphinidin-3-O-glucoside concentration with HT-29 inhibition (r=0.69). The concentration inhibition fifty (IC50) for BL, SH, RG on HT-29 and HCT-116 cell proliferation ranged 0.9–2.0mg/mL. Extracts decreased expression of anti-apoptotic proteins (survivin, cIAP-2, XIAP), induced apoptosis, and arrested cells in G1. Anthocyanins exhibited tyrosine kinase inhibitory potential in silico and biochemically; cyanidin-3-O-glucoside had one of the highest binding affinities with all kinases, especially ABL1 (−8.5kcal/mol). Cyanidin-3-O-glucoside and delphinidin-3-O-glucoside inhibited EGFR (IC50=0.10 and 2.37µM, respectively). Cyanidin-3-O-glucoside was the most potent anthocyanin on kinase inhibition.