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Effect of astragaloside IV (AS-IV) on the viability of human umbilical vein endothelial cells (HUVECs). HUVECs were incubated with AS-IV at a concentration of 3, 10, or 30 µmol/L for the indicated times. Cell viability was determined by a 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay. ∗p < 0.05 and ∗∗p < 0.01 compared with the corresponding control group.
