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- W1993232996 abstract "Signal transduction pathways and transcription factors are likely to be important mediators of stress responses to ischaemia and reperfusion injury following renal transplantation. We have investigated the activation of the transcription factor nuclear factor kappaB (NF-kappaB) and the mitogen activated protein kinases (MAPK), p44/42 (ERK 1/2), p38 and c-Jun N-terminal kinase (JNK) during cold stress at 4 degrees C. Human umbilical vein endothelial cells (HUVECs) were subjected to 72 h of hypothermia in a renal preservation solution. NF-kappaB activation was assessed by electromobility shift assays and MAPK activation by immunoblotting. Cell viability and apoptosis was assessed. Hypothermia activated the NF-kappaB complex, ERK 1/2 and p38 MAPK pathway. There was a 6-fold increase in NF-kappaB in the nucleus within minutes of hypothermia, correlating with p38 (p = 0.01) and ERK 1/2 activation (p = 0.03). A significant relationship was found between ERK 1/2, p38 and NF-kappaB throughout the 72 h time course (p = 0.01). In contrast, hypothermia had no effect on JNK phosphorylation. Inhibition of MAPK with an MEK inhibitor (PD098059) blocked the activation of NF-kappaB but a specific p38 inhibitor (SB203580) had no effect on NF-kappaB. Increased lactate production after 48 h indicated a switch towards anaerobic metabolism during prolonged hypothermia. Endothelial cells had a high viability and no DNA fragmentation throughout the experiment. Activation of stress pathways during organ procurement may be important in the quality of stored grafts." @default.
- W1993232996 created "2016-06-24" @default.
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- W1993232996 date "2002-04-01" @default.
- W1993232996 modified "2023-09-24" @default.
- W1993232996 title "Activation of NF-κB and MAP kinase cascades by hypothermic stress in endothelial cells" @default.
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- W1993232996 doi "https://doi.org/10.1016/s0011-2240(02)00018-4" @default.
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