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  • Title: β-D-Glucosyl-(1-4)-α-L-thevetosides of 17β-digitoxigenin from seeds of Cerbera manghas L. induces apoptosis in human hepatocellular carcinoma HepG2 cells.
    Author: Feng B, Guo YW, Huang CG, Li L, Jiao BH.
    Journal: Exp Toxicol Pathol; 2012 Jul; 64(5):403-10. PubMed ID: 21036567.
    Abstract:
    β-D-Glucosyl-(1-4)-α-L-thevetosides of 17β-digitoxigenin (GHSC-73) is a cardiac glycoside isolated from the seeds of Cerbera manghas L. GHSC-73 reduced viability of HepG2 cells in a time- and dose-dependent manner without decreasing the viability of Chang human liver cells and Swiss albino 3T3 fibroblasts, induced efficiently stimulated apoptosis in HepG2 cells as evidenced by DNA fragmentation, annexin V/PI binding assay and DAPI staining. This apoptotic process was accompanied by the activation of the effector caspase-3, the loss of mitochondrial membrane potential (ΔΨ(m)) and translocation of AIF from the mitochondrion to the nucleus in HepG2 cells. In addition, a broad-spectrum caspase inhibitor (z-VAD-fmk) tested in this experiment partially prevent HepG2 cells from GHSC-73-induced cell death, but did not affect translocation of AIF from the mitochondrion to the nucleus after GHSC-73 treatment. Our results firstly show that GHSC-73 inhibits the growth of HepG2 cells through caspase-dependent and -independent apoptosis pathways.
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