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• W1981463575 abstract "Tumour necrosis factor-alpha (TNF-alpha) plays a key role in causing ischaemia/reperfusion (I/R) injury. I/R also causes activation of xanthine oxidase and dehydrogenase (XDH + XO) system that, via generated free radicals, causes organ damage. We investigated the effect of ischaemia, reperfusion and non-ischaemic prolonged perfusion (NIP) on TNF-alpha and XDH + XO production in an isolated perfused rat liver model.Rat livers underwent 150 min NIP (control group) or two hours of ischaemia followed by reperfusion (I/R group). TNF-alpha (TNF-alpha mRNA and protein level), XDH + XO production and bile secretion were determined in tissue and effluent at baseline, at 120 min of ischaemia, after 30 min of reperfusion (I/R group) and after 120 and 150 min of prolonged perfusion (control).Unexpectedly, neither ischaemia nor reperfusion had any effect on TNF-alpha production. TNF-alpha in effluent was 11 +/- 4.8 pg mL(-1) at baseline, 7 +/- 3.2 pg mL(-1) at the end of ischaemia, and 13 +/- 5.3 pg mL(-1) after 30 min of reperfusion. NIP, however, caused a significant increase of TNF-alpha synthesis and release. TNF-alpha effluent level after 120 and 150 min of perfusion was 392 +/- 78.7 pg mL(-1) and 408 +/- 64.3 pg mL(-1), respectively. TNF-alpha mRNA in tissue was also significantly elevated compared to baseline levels (1.31 +/- 0.2 P < 0.001 and 1.38 P < 0.002, respectively). Decrease of liver function (expressed by bile secretion) during I/R and NIP was accompanied by significant XDH + XO elevation.This is the first evidence that NIP, and not I/R, is the decisive trigger for TNF-alpha production. This study leads to a better understanding of pathogenesis of liver I/R and perfusion damage." @default.
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• W1981463575 date "2008-08-18" @default.
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• W1981463575 title "New evidence for the role of TNF-α in liver ischaemic/reperfusion injury" @default.
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• W1981463575 doi "https://doi.org/10.1111/j.1365-2362.2008.01996.x" @default.
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