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• W2792287610 abstract "Perfluorooctanesulfonate (PFOS)-containing compounds are widely used in all aspects of industrial and consumer products. Recent studies indicated that PFOS is ubiquitous in environments and is considered to be a new type of persistent organic pollutant (POP). This has raised concerns regarding its adverse effects on human health. The nervous system is regarded as a sensitive target of environmental contaminants, including PFOS. Previous findings showed that PFOS can induce neurobehavioral deficits. However, the molecular mechanism underlying PFOS neurotoxicity remains obscure. Astrocyte activation and the resulting pro-inflammatory cytokine release play an integral role in protecting neurons from neurotoxin-mediated damage. If uncontrolled, sustained astrocyte activation may cause the secretion of excessive levels of pro-inflammatory cytokines that exacerbate the initial damage. In this study, we showed that PFOS could promote excessive secretion of tumor necrosis factor-α (TNF-α) in dose- and time-dependent manners in astrocytes. Furthermore, PFOS exposure could induce the phosphorylation of Janus kinase 2 (JAK2)/signal transducer and activator of transcription 3 (STAT3). This suggests that the JAK2/STAT3 signal transduction pathway is involved in PFOS-mediated astrocyte activation and secretion of TNF-α. Indeed, targeted blockage of the JAK2/STAT3 pathway prevented the phosphorylation of JAK and STAT3, and it also caused abnormal expression of TNF-α. Finally, we demonstrated that SH-SY5Y neuronal cells underwent rapid apoptosis via a TNF-α-dependent mechanism after exposure to PFOS-treated astrocyte-conditioned medium. In summary, our findings reveal that PFOS mediates a rapid activation of JAK2/STAT3 signal transduction in C6 astrocytes, which plays a pivotal role in the initiation of PFOS-mediated neurotoxicity." @default.
• W2792287610 created "2018-03-29" @default.
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• W2792287610 date "2018-05-01" @default.
• W2792287610 modified "2023-10-16" @default.
• W2792287610 title "Perfluorooctanesulfonate induces neuroinflammation through the secretion of TNF-α mediated by the JAK2/STAT3 pathway" @default.
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• W2792287610 doi "https://doi.org/10.1016/j.neuro.2018.03.003" @default.
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