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- W4224254906 abstract "Roxadustat and other hypoxia-inducible factor-prolyl hydroxylase inhibitors (HIF-PHIs) have recently been approved for the treatment of chronic renal anemia. In macrophages and monocytes, the activation of HIF-1 by pro-inflammatory cytokines induces iNOS expression and activity through the NF-κB pathway to produce nitric oxide (NO), which causes liver injury when excessively produced. Few studies have reported a relationship between HIF activity and iNOS induction in hepatocytes. We investigated the effect of drug- and hypoxia-induced HIF activations on NO production in primary cultured rat hepatocytes. Roxadustat treatment and hypoxic conditions activated HIF. Contrary to expectations, HIF-PHI treatment and hypoxia inhibited IL-1β-induced NO production. RNA-Seq analysis of mRNA expression in rat hepatocytes showed that roxadustat treatment decreased the expression of genes related to inflammation, and genes in the NF-κB signaling pathway were induced by IL-1β. Moreover, roxadustat suppressed IL-1β-activated signaling pathways in an HIF-dependent manner. GalN/LPS-treated rats were used as in vivo models of hepatic injury, and roxadustat treatment showed a tendency to suppress the death of rats. Therefore, exogenous HIF-1 activation, including HIF-PHI and hypoxia exposures, suppressed IL-1β-induced iNOS mRNA expression and subsequent NO production in hepatocytes, by suppressing the NF-κB signaling pathway. Roxadustat treatment suppresses the expression of pro-inflammatory genes by activating HIF, and thus may exhibit hepatoprotective effects." @default.
- W4224254906 created "2022-04-26" @default.
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- W4224254906 date "2022-07-01" @default.
- W4224254906 modified "2023-10-16" @default.
- W4224254906 title "Activation of transcription factor HIF inhibits IL-1β-induced NO production in primary cultured rat hepatocytes" @default.
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- W4224254906 doi "https://doi.org/10.1016/j.niox.2022.04.002" @default.
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