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- W2054968910 abstract "JANEX-1/WHI-P131, a selective Janus kinase 3 (JAK3) inhibitor, has been shown to delay the onset of diabetes in the NOD mouse model. However, the molecular mechanism by which JANEX-1 protects pancreatic beta-cells is unknown. In the current study, we investigated the role of JANEX-1 on interleukin (IL)-1beta and interferon (IFN)-gamma-induced beta-cell damage using isolated islets. JANEX-1-pretreated islets showed resistance to cytokine toxicity, namely suppressed nitric oxide (NO) production, reduced inducible form of NO synthase (iNOS) expression, and decreased islet destruction. The molecular mechanism by which JANEX-1 inhibits iNOS expression was mediated through suppression of the nuclear factor kappaB (NF-kappaB) and JAK/signal transducer and activator of transcription (STAT) pathways. Islets treated with the cytokines downregulated the protein levels of suppressor of cytokine signaling (SOCS)-1 and SOCS-3, but pretreatment with JANEX-1 attenuated these decreases. Additionally, islets from JAK3(-/-) mice were more resistant to cytokine toxicity than islets from control mice. These results demonstrate that JANEX-1 protects beta-cells from cytokine toxicity through suppression of the NF-kappaB and JAK/STAT pathways and upregulation of SOCS proteins, suggesting that JANEX-1 may be used to preserve functional beta-cell mass." @default.
- W2054968910 created "2016-06-24" @default.
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- W2054968910 date "2009-07-01" @default.
- W2054968910 modified "2023-09-23" @default.
- W2054968910 title "JANEX-1, a JAK3 inhibitor, protects pancreatic islets from cytokine toxicity through downregulation of NF-κB activation and the JAK/STAT pathway" @default.
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- W2054968910 doi "https://doi.org/10.1016/j.yexcr.2009.04.021" @default.
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