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- W2130366211 abstract "Abstract β-Ionone (ION), an end-ring analogue of β-carotenoid, has been known to inhibit tumor cell growth and induce apoptosis in various types of cancer cells. Nevertheless, its apoptosis-related molecular mechanisms remain unclear. Here, we first investigated the molecular mechanisms by which ION sensitizes cancer cells to the therapeutic potential of tumor necrosis factor–related apoptosis-inducing ligand (TRAIL). Notably, treatment with subtoxic concentrations of ION and TRAIL effectively inhibited cell viability in the hepatocellular carcinoma cell line Hep3B and other cancer cell lines such as colon carcinoma cell line HCT116 and leukemia cell line U937. Combined treatment with ION and TRAIL was also more effective in inducing DR5 expression, caspase activities, and apoptosis than treatment with either agent alone. ION-mediated sensitization to TRAIL was efficiently reduced by treatment with a chimeric blocking antibody or small interfering RNA specific for DR5. Electrophoretic mobility shift assay and a chromatin immunoprecipitation assay confirmed that ION treatment upregulates the binding of transcription factor Sp1 to its putative site within the DR5 promoter region, suggesting that Sp1 is an ION-responsive transcription factor. In addition, ION significantly increased hepatocellular carcinoma cell sensitivity to TRAIL by abrogating TRAIL-induced NF-κB activation and decreasing the expression of antiapoptotic proteins such as XIAP and IAP-1/2. Taken together, these data suggest that ION is a useful agent for TRAIL-based cancer treatments. Mol Cancer Ther; 9(4); 833–43. ©2010 AACR." @default.
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- W2130366211 date "2010-04-01" @default.
- W2130366211 modified "2023-09-27" @default.
- W2130366211 title "β-Ionone Enhances TRAIL-Induced Apoptosis in Hepatocellular Carcinoma Cells through Sp1-Dependent Upregulation of DR5 and Downregulation of NF-κB Activity" @default.
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- W2130366211 doi "https://doi.org/10.1158/1535-7163.mct-09-0610" @default.
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