Abstract
Five compounds were isolated from Calophyllum polyanthum leaves (10.09 g) by bioassay-guided fractionation to evaluate their anti-tumor activity. Among these compounds, apetalic acid (1) demonstrated significant inhibitory activity against 8 types of tumor cells (MHCC97H, CNE1, CNE2, B16, LOVO, SW480, A549, 1299), especially against two colon cancer cells (LOVO, SW480). Apetalic acid could inhibit cell proliferation, migration, invasion and induce apoptosis. It could significantly up-regulate the expression levels of apoptosis-related genes (BAX, Caspase-9,) and proteins (BAX, Cleaved-caspase-9, Cleaved-caspase-3) and down-regulated the expression of inhibitor of apoptosis gene (Bcl-2) and proteins (Bcl-2, phosphorylated AKT). Possible mechanism of the antitumor activity of apetalic acid derived from Calophyllum polyanthum supports its use in the prevention and treatment of colorectal cancer.
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