OBJECTIVE To investigate the influence of quercetin on the apoptosis of human colon cancer HT-29 cells in vitro and study the induced mechanism. METHODS Human colon cancer HT-29 cells were cultured in vitro and divided into 4 groups, including control group, high-dose quercetin group(32 μg·m L-1), medium-dose quercetin group(316 μg·m L-1) and low-dose quercetin group(8 μg·m L-1). After quercetin intervention for 24 h, CCK-8 kit was used to observe the effect of quercetin on HT-29 cells proliferation; altera...