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• W2121658973 abstract "TNF-related apoptosis-inducing ligand (TRAIL)-induced apoptosis is a crucial event in the control of tumor growth. However, many cancer cells, including colon cancer cells, are resistant to TRAIL-driven cell death. We have recently shown that 2-methoxy-5-amino-N-hydroxybenzamide (herein termed 2-14), a novel derivative of mesalamine, induces endoplasmic reticulum stress in colon cancer cells. Because endoplasmic reticulum stress-induced signals regulate the expression of molecules involved in TRAIL-driven apoptosis, we examined whether 2-14 makes colon cancer cells sensitive to TRAIL. Colon cancer cells were cultured with 2-14 and/or TRAIL. Death receptor (DR) 4/DR5 were analyzed by real-time PCR and flow cytometry. TRAIL pathway-associated proteins and extracellular signal-regulated kinase (ERK) were assessed by Western blotting. The in vivo capability of 2-14 to sensitize colon cancer cells to TRAIL-induced apoptosis was evaluated in a syngenic colon cancer model in which CT26-derived grafts were induced in mice. 2-14 promoted ERK-dependent induction of DR5, thereby enhancing TRAIL-mediated caspase-8 activation and apoptosis. Analysis of TRAIL-related pro- and antiapoptotic factors and functional studies revealed that survivin is involved in the protection of colon cancer cells against TRAIL-driven apoptosis. Notably, 2-14 enhanced ubiquitination and proteasome-mediated degradation of survivin. These data were confirmed in a murine model of TRAIL-resistant colon cancer in which 2-14 upregulated DR5, reduced survivin expression, and synergized with TRAIL in inhibiting tumor growth. Similarly, intraperitoneal administration of 2-14 to mice upregulated DR5 and downregulated survivin in a model of colitis-associated colon cancer. These findings indicate that 2-14 acts as a sensitizer for TRAIL-induced apoptosis and suggest that 2-14 can be useful in the therapy for TRAIL-resistant colon cancer." @default.
• W2121658973 created "2016-06-24" @default.
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• W2121658973 date "2011-10-01" @default.
• W2121658973 modified "2023-10-06" @default.
• W2121658973 title "2-Methoxy-5-Amino-<i>N</i>-Hydroxybenzamide Sensitizes Colon Cancer Cells to TRAIL-Induced Apoptosis by Regulating Death Receptor 5 and Survivin Expression" @default.
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• W2121658973 doi "https://doi.org/10.1158/1535-7163.mct-11-0316" @default.
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