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• W2045326920 endingPage "427" @default.
• W2045326920 startingPage "418" @default.
• W2045326920 abstract "Thioredoxins (Trx) together with thioredoxin reductases (TrxR) participate in the maintenance of protein thiol homeostasis and play cytoprotective roles in tumor cells. Therefore, thioredoxin–thioredoxin reductase system is considered to be a promising therapeutic target in cancer treatment. We have previously reported that SK053, a peptidomimetic compound targeting the thioredoxin–thioredoxin reductase system, induces oxidative stress and demonstrates antitumor activity in mice. In this study, we investigated the mechanisms of SK053-mediated tumor cell death. Our results indicate that SK053 induces apoptosis of Raji cells accompanied by the activation of the endoplasmic reticulum (ER) stress and induction of unfolded protein response. Incubation of tumor cells with SK053 induces increase in BiP, CHOP, and spliced XBP-1 levels, which precede induction of apoptosis. CHOP-deficient (CHOP−/−) mouse embryonic fibroblasts are more resistant to SK053-induced apoptosis as compared with normal fibroblasts indicating that the apoptosis of tumor cells depends on the expression of this transcription factor. Additionally, the ER-stress-induced apoptosis, caused by SK053, is strongly related with Trx expression levels. Altogether, our results indicate that SK053 induces ER stress-associated apoptosis and reveal a link between thioredoxin inhibition and induction of UPR in tumor cells." @default.
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• W2045326920 date "2015-02-01" @default.
• W2045326920 modified "2023-10-10" @default.
• W2045326920 title "SK053 triggers tumor cells apoptosis by oxidative stress-mediated endoplasmic reticulum stress" @default.
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• W2045326920 doi "https://doi.org/10.1016/j.bcp.2014.12.019" @default.
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