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- W2110345092 abstract "Sustained hepatic inflammation induced by various causes can lead to liver fibrosis. Transcription factor NF-kappaB is important in regulating inflammatory responses, especially in macrophages. We presently investigated whether an NF-kappaB decoy, a synthetic oligodeoxynucleotide (ODN) imitating the NF-kappaB binding site, inhibited the inflammatory response after CCl(4) intoxication to prevent CCl(4)-induced hepatic injury and fibrosis. The NF-kappaB decoy was introduced into livers by injecting the spleens of mice, using a hemagglutinating virus of Japan (HVJ)-liposome method. ODN was transferred mainly to macrophages in normal or fibrotic livers. Increases in serum transaminases and production of inflammatory cytokines after a single challenge with CCl(4) were inhibited by the NF-kappaB decoy, which suppressed nuclear translocation of NF-kappaB in liver macrophages. Liver fibrosis induced by CCl(4) administration for 8 wk was suppressed by the NF-kappaB decoy, accompanied by diminished mRNA expression for transforming growth factor (TGF)-beta, procollagen type 1 alpha(1), and alpha-smooth muscle actin (SMA). In vitro, isolated liver macrophages showed increased DNA binding activity of NF-kappaB and inflammatory cytokine production after hydrogen peroxide treatment; both increases were inhibited significantly by the NF-kappaB decoy. In contrast, NF-kappaB decoy transferred to isolated hepatic stellate cells (HSC) had no effect on their morphological activation or alpha-SMA expression, although the decoy accelerated tumor necrosis factor (TNF)-alpha-induced apoptosis in activated HSC. The effect of NF-kappaB decoy suppressing fibrosis probably results mainly from anti-inflammatory effects on liver macrophages, with a possible minor contribution from its direct proapoptotic effect on activated HSC." @default.
- W2110345092 created "2016-06-24" @default.
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- W2110345092 date "2007-09-01" @default.
- W2110345092 modified "2023-09-30" @default.
- W2110345092 title "Selective inactivation of NF-κB in the liver using NF-κB decoy suppresses CCl<sub>4</sub>-induced liver injury and fibrosis" @default.
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- W2110345092 doi "https://doi.org/10.1152/ajpgi.00185.2007" @default.
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