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- W1996465613 abstract "Herbal hepatotoxicity has been increasingly reported in clinical context, but the underlying mechanisms are poorly understood. Saikosaponin D (SSD) is a major component of saikosaponins isolated from Bupleurum falactum, a herb that has been linked to hepatotoxicity. Our current study was to examine the toxic effect of SSD on human hepatocyte LO2 cells and explore the possible mechanism. The results demonstrated that SSD reduced cell viability and led to dramatic morphological alterations in LO2 cells. Hoechst staining and flow cytometry analyses showed that SSD stimulated hepatocyte apoptosis. SSD-treated cells exhibited apparent nuclear condensation and fragmentation, and the apoptotic cells were increased by SSD dose-dependently. Subsequent experiments showed that SSD decreased mitochondrial membrane potential and downregulated Bcl-2 but upregulated Bax. Moreover, caspase-9 and caspase-3 were activated in SSD-treated LO2 cells. These data consistently indicated that SSD stimulated mitochondrial apoptosis in hepatocytes. Mechanistic investigations showed that SSD disrupted p38 signaling and that p38 specific inhibitor SB203580 mimicked the pro-apoptotic effect of SSD. In addition, platelet-derived growth factor-β receptor (PDGF-βR) blocker imatinib reduced p38 phosphorylation and also mimicked the pro-apoptotic effect of SSD in LO2 cells. These data collectively indicated that SSD induced apoptosis by interrupting PDGF-βR/p38 pathway in LO2 hepatocytes." @default.
- W1996465613 created "2016-06-24" @default.
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- W1996465613 date "2013-10-01" @default.
- W1996465613 modified "2023-10-15" @default.
- W1996465613 title "Saikosaponin D disrupts platelet-derived growth factor-β receptor/p38 pathway leading to mitochondrial apoptosis in human LO2 hepatocyte cells: A potential mechanism of hepatotoxicity" @default.
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- W1996465613 doi "https://doi.org/10.1016/j.cbi.2013.08.006" @default.
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