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• W2042203071 endingPage "191" @default.
• W2042203071 startingPage "186" @default.
• W2042203071 abstract "The aim of this study was to investigate the behavior of the transcription factors, heat-shock factor (HSF) and nuclear factor κB (NF-κB), in postischemic reperfused liver, with particular attention paid to possible differences in the time-course and mechanism of activation, which may help in defining their role in the response of the liver to reperfusion. Ischemia was induced by clamping the hilar pedicle of the left lateral and median liver lobes; the clamp was removed after 1 hour. Some rats were treated intraperitoneally with IL-1 receptor antagonist (IL-1RA) 30 minutes before ischemia and at the time of reperfusion. Binding of NF-κB to the corresponding consensus sequence is activated after 30 minutes of reperfusion, and is still increased 1 hour after reperfusion. Activation is suppressed in rats treated with IL-1RA; NF-κB persists in the cytosol associated with the inhibitor, IκB, and can be artifactually activated in vitro. Super-gel shift experiments revealed that the two subunits, p50 and p65, are involved in the activation of binding. In contrast, binding of HSF to the corresponding consensus sequence, heat shock element (HSE), is already activated at the end of ischemia, shows a further increase after 30 minutes of reperfusion, but declines 1 hour after reperfusion; more importantly, it is not inhibited by pretreatment of the rat with IL-1RA. In conclusion, although both HSF and NF-κB are activated by ischemia-reperfusion, there are clear differences in time-course and mechanism of activation of the two transcription factors. Activation of HSF depends directly on some events occurring during ischemia; NF-κB is activated only after reperfusion and the concurrent oxidative stress, by an indirect mechanism that can be suppressed by IL-1RA. The possibility of dissociating the activation of these two transcription factors in postischemic reperfusion can have a prospective clinical relevance." @default.
• W2042203071 created "2016-06-24" @default.
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• W2042203071 date "1997-07-01" @default.
• W2042203071 modified "2023-09-29" @default.
• W2042203071 title "Differential activation of heat shock and nuclear factor ?B transcription factors in postischemic reperfused rat liver" @default.
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• W2042203071 doi "https://doi.org/10.1002/hep.510260124" @default.
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