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• W2892342148 abstract "Abstract Endoplasmic reticulum stress (ERS) is usually involved in tumor development and progression, and anticancer agents have recently been recognized to induce ERS. Cucurbitacin‐I showed a potent anticancer action by inducing apoptosis through the inhibition of signal transducer and activator of transcription 3 pathway and triggering autophagic cell death. It is not known whether ERS mediates the cancer cell death induced by cucurbitacin‐I. Here, we investigated the role of ERS in cucurbitacin‐I‐treated SKOV3 ovarian cancer cells and PANC‐1 pancreatic cancer cells. We confirmed that cucurbitacin‐I caused cell death and stirred excessive ERS levels by activating inositol requiring enzyme 1α (IRE1α) and protein kinase R‐like endoplasmic reticulum kinase (PERK), as well as PERK downstream factors, including IRE1α and C/EBP homologous protein, but not activating transcription factor 6 (ATF6α) pathway, which was in parallel with the increased Bax and caspase‐12‐dependent ERS‐associated apoptosis, autophagy and autophagy flux levels and caspase‐independent nonapoptotic cell death. Furthermore, 4‐phenylbutyrate, an ERS inhibitor, suppressed cucurbitacin‐I‐induced apoptosis, autophagy, autophagy flux, and autophagic cell death. Simultaneously, there are positive correlations among ERS and cucurbitacin‐I‐induced reactive oxygen species and Ca 2+ . Our results suggested that cucurbitacin‐I‐induced cancer cell death through the excessive ERS and CHOP‐Bax and caspase‐12‐dependent ERS‐associated apoptosis, as well as ERS‐dependent autophagy, autophagy flux, and caspase‐independent nonapoptotic cell death. These novel signaling insights may be useful for developing new, effective anticancer strategies in oncotherapy." @default.
• W2892342148 created "2018-09-27" @default.
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• W2892342148 date "2018-09-11" @default.
• W2892342148 modified "2023-10-15" @default.
• W2892342148 title "Cucurbitacin I induces cancer cell death through the endoplasmic reticulum stress pathway" @default.
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• W2892342148 doi "https://doi.org/10.1002/jcb.27570" @default.
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