PMID- 16488636 OWN - NLM STAT- MEDLINE DCOM- 20060616 LR - 20081121 IS - 1095-6433 (Print) IS - 1095-6433 (Linking) VI - 143 IP - 4 DP - 2006 Apr TI - Oxidative stress and HIF-1 DNA binding during stressful cold exposure and recovery in the North Sea eelpout (Zoarces viviparus). PG - 494-503 AB - Effects of acute cold exposure (at 1 degrees C and 5 degrees C) on tissue redox state and oxidative stress parameters, as well as the onset of hypoxic signaling were investigated in the North Sea eelpout, Zoarces viviparus. Activation of the transcription factor HIF-1 (hypoxia inducible factor) was detected in liver samples after acute cold exposure. At this temperature the cellular redox milieu was significantly reduced (below -270 mV) as compared to controls (-250 to -267 mV). Increased levels of oxidative stress parameters (TBARS and protein carbonyls) were observed mainly during recovery at control temperature (12 degrees C). This increase in oxidative stress parameters, in spite of maintained antioxidant capacity, indicates that acute cold stress and recovery mimic ischemia/reperfusion events as found in mammals. Notably the non-enzymatic antioxidant defense (e.g. glutathione) may play an important role for eelpout ROS scavenging capacity under cold stress. FAU - Heise, Katja AU - Heise K AD - Alfred-Wegener-Institute for Polar and Marine Research, Physiology of Marine Animals, Am Handelshafen 12, 27570 Bremerhaven, Germany. FAU - Puntarulo, Susana AU - Puntarulo S FAU - Nikinmaa, Mikko AU - Nikinmaa M FAU - Lucassen, Magnus AU - Lucassen M FAU - Portner, Hans-O AU - Portner HO FAU - Abele, Doris AU - Abele D LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20060220 PL - United States TA - Comp Biochem Physiol A Mol Integr Physiol JT - Comparative biochemistry and physiology. Part A, Molecular & integrative physiology JID - 9806096 RN - 0 (Antioxidants) RN - 0 (Hypoxia-Inducible Factor 1) RN - 0 (Thiobarbituric Acid Reactive Substances) RN - 9007-49-2 (DNA) SB - IM MH - Animals MH - Antioxidants/metabolism MH - Behavior, Animal MH - Cold Temperature MH - DNA/*metabolism MH - Hypoxia-Inducible Factor 1/genetics/*metabolism MH - Liver/metabolism MH - North Sea MH - *Oxidative Stress MH - Perciformes/*physiology MH - Signal Transduction MH - Stress, Physiological MH - Thiobarbituric Acid Reactive Substances/metabolism EDAT- 2006/02/21 09:00 MHDA- 2006/06/17 09:00 CRDT- 2006/02/21 09:00 PHST- 2005/07/18 00:00 [received] PHST- 2006/01/09 00:00 [revised] PHST- 2006/01/10 00:00 [accepted] PHST- 2006/02/21 09:00 [pubmed] PHST- 2006/06/17 09:00 [medline] PHST- 2006/02/21 09:00 [entrez] AID - S1095-6433(06)00028-6 [pii] AID - 10.1016/j.cbpa.2006.01.014 [doi] PST - ppublish SO - Comp Biochem Physiol A Mol Integr Physiol. 2006 Apr;143(4):494-503. doi: 10.1016/j.cbpa.2006.01.014. Epub 2006 Feb 20.