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  • Title: Glycogen synthase kinase-3β regulates tumor necrosis factor-related apoptosis inducing ligand (TRAIL)-induced apoptosis via the NF-κB pathway in hepatocellular carcinoma.
    Author: Fu K, Pan H, Liu S, Lv J, Wan Z, Li J, Sun Q, Liang J.
    Journal: Oncol Lett; 2015 Dec; 10(6):3557-3564. PubMed ID: 26788169.
    Abstract:
    Tumor necrosis factor (TNF)-related apoptosis-inducing ligand (TRAIL) is known for its ability to selectively induce apoptosis in malignant cells. However, human hepatocellular carcinoma (HCC) cells display resistance to TRAIL-induced cell death. The present study investigated whether TRAIL-induced apoptosis in HCC cells was enhanced by the administration of an inhibitor of glycogen synthase kinase-3β (GSK-3β) or by short hairpin RNA-mediated inhibition of GSK-3β. The results of the current study demonstrated that inhibition of GSK-3β significantly impairs the expression of the nuclear factor-κB (NF-κB) target genes Bcl-xL and clAP2 in HCC cells (P<0.05). This indicates that GSK-3β may regulate NF-κB target genes involved in cell survival. Furthermore, knockdown of Bcl-xL significantly enhanced the sensitizing effect of GSK-3β inhibitor on TRAIL-induced apoptosis (P<0.05). Overall, the present study provides a rationale for further exploration of GSK-3β inhibition combined with TRAIL as a novel treatment for HCC.
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