Abstract
A ginseng polysaccharide was extracted, purified, and modified by nitric acid-selenious acid (HNO3-H2SeO3) method to yield one selenylation-modified polysaccharide (sGP). We reported for the first time the anticancer potential of sGP on the human promyelocytic leukemia HL-60 cell line and evaluated its relevant underlying mechanism. Our results showed that sGP markedly inhibited the growth of HL-60 cells via induction of apoptosis. The event of apoptosis was accompanied by the formation of apoptotic bodies; the release of cytochrome c; loss of mitochondrial membrane potential; and activation of caspase-9, caspase-3, and cleavage of poly ADP ribose polymerase (PARP) in HL-60 cells. In addition, western blot analysis showed that sGP inhibited antiapoptotic Bcl-2 protein expression and increased proapoptotic Bax protein expression in cells under identical conditions. Together, our study suggests that sGP induces apoptosis of HL-60 cells through the mitochondrial-dependent pathway.
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