Fluoxetine induces apoptosis through endoplasmic reticulum stress via mitogen-activated protein kinase activation and histone hyperacetylation in SK-N-BE(2)-M17 human neuroblastoma cells

In this study, the molecular mechanisms underlying the anti-cancer effects of FLX were investigated in SK-N-BE(2)-M17 human neuroblastoma cells. FLX induced apoptotic cell death, activation of caspase-4, -9, and -3, and expression of endoplasmic reticulum (ER) stress-associated proteins, including C/EBP homologous protein (CHOP). Inhibition of ER stress by treatment with the ER stress inhibitors, salubrinal and 4-phenylbutyric acid or CHOP siRNA transfection reduced FLX-induced cell death. FLX induced phosphorylation of mitogen-activated protein kinases (MAPKs) family, p38, JNK, and ERK, and an upstream kinase apoptosis signal kinase 1 (ASK1). Inhibition of MAPKs and ASK1 reduced FLX-induced cell death and CHOP expression. We then showed that FLX reduced mitochondrial membrane potential (M...

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