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Apoptosis Induction and Its Mechanism of Ginseng Polysaccharide on Human Heratoma BEL-7402 Cells

??OBJECTIVE To investigate the apoptosis of the auction and mechanism of the hepatoma BEL-7402 cells induced by the ginseng polysaccharides(GPS). METHODS The hematoma cells BEL-7402 were incubated with GPS, cell viability was measured by CCK8, cell cycle distribution was assessed by fluorescence-activated cell sorting(FACS), the cell morphological changes were traced with TUNEL and scanning electron microscope, TNFR1, BCL-2 and Bax protein expression and ERK phosphorylation are tested by Western blot. RESULTS CCK8 results showed that GPS inhibited cells growth of BEL-7402 in dose-dependent and time-dependent. Flow cytometry found that S phase arrest was increased upon GPS concentrations. Obviously apoptotic sub-g peak was also found. And the peak was gradually enhanced with the concentration increased. TUNEL staining and SEM results showed that GPS led to significant cell morphology changes in hepatoma cells BEL-7402.And the apoptosis effect was increased upon the GPS concentrations. Western blot showed that level of apoptosis related protein Bax was increased, the expression of apoptosis-antagonizing protein Bcl-2 was decreased and the expression of death receptor TNFR1 appeared with GPS concentrations increased gradually,raise ERK phosphorylation. CONCLUSION GPS can induce apoptosis of hepatoma cells BEL-7402 by the mitochondrial pathway and the death receptor dependent pathway and ERK pathway.