Effects of Lycium barbarian polysaccharide (LBP), Astragalus polysaccharide (APS), polysaccharide of Acanthopanax senticosus (PAS) and polysaccharide of lipopolysaccharide (PS) on cytotoxicities of LAK cells from splenocytes of C57BL/6 mices were observed with 18 h 125IUdR release assay. Our study demonstrated that the polysaccharides alone were shown to induce no cytotoxicities. When combined with rIL-2, all of 4 kinds of the polysaccharides augrnented LAK activities in dose-dependent manner. The augmentations reached the maximum at 0.01-0.1 mg ? ml-1 LBP, 0.01 mg ? ml-1 APS and PAS, 0.01 mg ? ml-1 PS. They were found to increase LAK activities in short range of rIL-2 concentrations (250-1000U? ml-1). If the polysaccharides were used beyond the suitable concentrations, they were shown to inhibit LAK cell activities.

Objective To study the inhibitory effect of Curcumin combined with Glycyrrhetinic acid on proliferation of HepG-2 cell,and probe the reasonability and scientificity of curcuma combined with glycyrrhiza.Methods The CCK-8 method was used to test the proliferation inhibition rate of HepG-2 cells after treated with Curcumin (10.00,5.00,2.50,and 1.25 μg/mL),Glycyrrhetinic acid (20.0,10.0,5.0,and 2.5 μg/mL) and Curcumin combined with Glycyrrhetinic acid in corresponding concentration for different time (8,16,or 24 h).Flow cytometry was used to detect the cell apoptosis and the cell cycle of HepG-2 cells after treated with Curcumin (5 μg/mL),Glycyrrhetinic acid (10 μg/mL) and Curcumin combined with Glycyrrhetinic acid in corresponding concentration for 24 h.Results Curcumin,Glycyrrhetinic acid and drug combination obviously inhibited the proliferation of HepG-2 cells in a time-and concentration-dependent manner,the effects of combination group was more stronger and showed additive effect or synergistic effect.The apoptosis rate of HepG-2 cells was significantly increased after treated with three groups of drug,combination group showed additive effect;Curcumin,Glycyrrhetinic acid and the drug combination showed significant G2 arrest.Conclusion Curcumin combined with Glycyrrhetinic acid has positive effect on inhabiting the proliferation and promoting apoptosis of HepG-2 cell.Curcuma combined with glycyrrhiza possess reasonability and scientificity.