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- W2017338209 abstract "Tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) induces apoptosis through binding to TRAIL receptors, death receptor 4 (DR4), and DR5. TRAIL has potential therapeutic value against cancer because of its selective cytotoxic effects on several transformed cell types. Fucosylation of proteins and lipids on the cell surface is a very important posttranslational modification that is involved in many cellular events. Recently, we found that a deficiency in GDP-mannose-4,6-dehydratase (GMDS) rendered colon cancer cells resistant to TRAIL-induced apoptosis, resulting in tumor development and metastasis by escape from tumor immune surveillance. GMDS is an indispensable regulator of cellular fucosylation. In this study, we investigated the molecular mechanism of inhibition of TRAIL signaling by GMDS deficiency. DR4, but not DR5, was found to be fucosylated; however, GMDS deficiency inhibited both DR4- and DR5-mediated apoptosis despite the absence of fucosylation on DR5. In addition, GMDS deficiency also inhibited CD95-mediated apoptosis but not the intrinsic apoptosis pathway induced by anti-cancer drugs. Binding of TRAIL and CD95 ligand to their cognate receptors primarily leads to formation of a complex comprising the receptor, FADD, and caspase-8, referred to as the death-inducing signaling complex (DISC). GMDS deficiency did not affect formation of the primary DISC or recruitment to and activation of caspase-8 on the DISC. However, formation of secondary FADD-dependent complex II, comprising caspase-8 and cFLIP, was significantly inhibited by GMDS deficiency. These results indicate that GMDS regulates the formation of secondary complex II from the primary DISC independent of direct fucosylation of death receptors." @default.
- W2017338209 created "2016-06-24" @default.
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- W2017338209 date "2011-12-01" @default.
- W2017338209 modified "2023-09-26" @default.
- W2017338209 title "GDP-mannose-4,6-dehydratase (GMDS) Deficiency Renders Colon Cancer Cells Resistant to Tumor Necrosis Factor-related Apoptosis-inducing Ligand (TRAIL) Receptor- and CD95-mediated Apoptosis by Inhibiting Complex II Formation" @default.
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- W2017338209 doi "https://doi.org/10.1074/jbc.m111.262741" @default.
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