... Highlighted Article: High blood glucose levels can harm organisms by causing oxidative stress. At the macroevolutionary level, songbirds defy this expectation, as their glucose levels and oxidative physiology are uncoupled. Antioxidants Glucose Hyperglycaemia Lipid peroxidation Phylogenetic...

... of the migratory phenotype in birds is associated with changes in oxidative status. Avian migration Refuelling Oxidative stress Oxidative damage Lipid peroxidation Enzymatic antioxidants All sampling procedures were performed under the same photoperiod conditions (i.e. 12 h:12 h light:dark...

... to the clearance of a broad spectrum of exogenous and endogenous toxicants and harmful metabolites, including the reactive lipid aldehyde byproducts of lipid peroxidation that are a hallmark of cellular ageing. Here, we tested whether declining transporter functionality may contribute to functional decline...

...-rich diet had higher mass-specific BMR and oxidative stress (levels of lipid peroxidation) after exposure to low compared with high ambient temperature, whereas the opposite pattern was evident for birds with a UFA-rich diet. Surprisingly, birds on the SFA diet had higher relative levels...

... in oxidative stress status [as measured by antioxidant levels (superoxide dismutase and total glutathione), lipid peroxidation and telomere length] between control (21% oxygen) and hyperoxic (40% oxygen) embryos. However, the level of vitamin E was significantly lower and lipid peroxidation was significantly...

... responses. Interestingly, dietary supplementation of poultry over a time period of days to achieve chronic levels of the glucocorticoid corticosterone (Cort, the avian stress hormone) raises lipid peroxidation (a measure of oxidative damage) ( Lin et al., 2004a ), but acute exposure to Cort, via injection...

... biomarker of oxidative stress involved in antioxidant metabolism (i.e. glutathione recycling). However, changes in circulating carotenoids did not significantly explain changes in lipid peroxidation or GGT levels, suggesting that the higher resistance to oxidative stress of those individuals with more...

...J. M. Grim; D. R. B. Miles; E. L. Crockett SUMMARY Cold acclimation of ectotherms results typically in enhanced oxidative capacities and lipid remodeling, changes that should increase the risk of lipid peroxidation (LPO). It is unclear whether activities of antioxidant enzymes may respond...

... ). Lipid peroxidation products and antioxidant in human diseases . Env. Health Persp. 106 , 1229 - 1234 . Seivwright L.J. , Redpath S. , Mougeot F. , Watt L. , Hudson P.J. ( 2004 ). Faecal egg counts provide a reliable measure of Trichostrongylus tenuis intensities...

... © The Company of Biologists Limited 2006 2006 cold exposure antioxidant capacity free radical lipid peroxidation protein carbonyl It is well documented that a hypermetabolic state induced by thyroid hormone administration to experimental animals is accompanied by oxidative stress...

... to minimize oxidative stress during cycles of estivation and awakening. * Author for correspondence (e-mail: [email protected] ) 11 11 2002 © The Company of Biologists Limited 2003 2003 metabolic depression free radical glutathione lipid peroxidation carbonyl protein Helix aspersa...

... and hyperthyroid vitamin-E-treated rats were used. Hyperthyroidism, elicited by a 10 day treatment with tri-iodothyronine, induced an increase in lipid peroxidation without changing the level of antioxidants. Intraperitoneal vitamin administration to hyperthyroid rats led to a reduction in lipid peroxidation...