... that variation in resistance to oxidative stress plays a role in these differences. Functional data are needed to test this hypothesis. Here, we compared three Mytilus congeners to examine whether susceptibility to oxidative stress contributes to acute heat tolerance. We assayed the activity of two antioxidant...

... populations, and that these differences might be an overlooked legacy of past biogeographic processes. Antioxidant Oxidative stress Range expansion Senescence Vertebrates Ageing is a ubiquitous process of decline in physiological function, survival and fecundity with advancing age ( de...

...Marco Parolini; Cristina Daniela Possenti; Simona Secomandi; Silvia Carboni; Manuela Caprioli; Diego Rubolini; Andrea Romano; Nicola Saino ABSTRACT Variation in the concentration of antioxidants and hormones of maternal origin in the eggs of birds can have a profound influence on offspring...

.... However, two main assumptions of the hypothesis remain in question: whether carotenoids boost the performance of internal processes such as immune and antioxidant defenses, and whether allocating carotenoids to ornaments imposes a trade-off with such benefits. In this study, we tested these two...

... care behaviours. Cost of reproduction Cooperative breeder Glucocorticoid Oxidative stress Antioxidant Immune function Body condition Sexually reproducing organisms are faced with a fundamental decision – how to allocate valuable resources optimally when investment in current...

...Hannah Watson; Pablo Salmón; Caroline Isaksson ABSTRACT In oviparous animals, maternally transferred antioxidants protect the embryo from oxidative damage from high rates of reactive oxygen species (ROS) production incurred by rapid growth. Elevated ROS exposure, beyond that incurred by normal...

.... Instrumented mussels were deployed at two intertidal heights (near the lower and upper edges of the mussel zone) and in a continuously submerged tidepool. Following a 23-day monitoring period, measures of oxidative damage to DNA and lipids, antioxidant capacities (catalase activity and peroxyl radical...

...://www.biologists.com/user-licence-1-1/ Summary: The complex role of oxidative stress as a potential physiological mediator of life-history trade-off decisions for paternal smallmouth bass. Oxidative stress Smallmouth bass Life history 8-OHdG Antioxidant Although oxygen is essential for all...

...’ has received considerable attention with regards to food and antioxidant availability; however, the limitation of water availability has thus far been neglected. In this study, we experimentally examined the combined effect of pregnancy and water deprivation on oxidative status in a viviparous snake...

...Daniel Munro; Jason R. Treberg ABSTRACT Mitochondria are widely recognized as a source of reactive oxygen species (ROS) in animal cells, where it is assumed that over-production of ROS leads to an overwhelmed antioxidant system and oxidative stress. In this Commentary, we describe a more nuanced...

... migration Ocean acidification Critical oxygen partial pressure Cephalopoda Epigenetics Stress response Antioxidant Metabolic scaling Dosidicus gigas (d'Orbigny 1835) (Ommastrephidae) is a large, apex predator endemic to the Eastern Pacific Ocean ( Markaida and Sosa-Nishizaki, 2003...

... mobilised at higher temperatures, inhibit atrophy. We proposed that the biochemical response to temperature would be muscle-specific. We examined the effect of temperature on the antioxidant and heat shock protein systems and determined the extent of oxidative damage to lipids and proteins in two...

... can help determine the interactions of key redox responses at multiple levels of biological organization. * Author for correspondence ( [email protected] ) 23 1 2012 © 2012. 2012 antioxidant biomarker eccentric free radical training During the last decade...

... stimulates the oxidative stress and hypoxic hormetic responses, allowing these mammals to cope with the potentially detrimental effects associated with this condition. * Author for correspondence ( [email protected] ) 4 10 2011 © 2011. 2011 antioxidant apnea elephant seal...

... but not oxidative damage. To test the hypothesis that the antioxidant system of hooded seals develops as they transition from a terrestrial to an aquatic environment, we obtained the complete cDNA sequence that encodes the NF-E2-related factor 2 (Nrf2), a central regulator of the antioxidant response, and compared...

...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...

... levels, died at a faster rate than controls. In mammals, IIS induces the synthesis of reactive oxygen species and downregulates antioxidants, events that increase oxidative stress and that have been associated with reduced lifespan. Insulin treatment of mosquito cells in vitro induced hydrogen peroxide...

... reasons. First, some of these solutes may have unique protective metabolic roles, such as acting as antioxidants (e.g. polyols, taurine, hypotaurine),providing redox balance (e.g. glycerol) and detoxifying sulfide (hypotaurine in animals at hydrothermal vents and seeps). Second, some of these solutes...

... peroxynitrite and hydroxyl radical, which are capable of damaging lipids, proteins and DNA. Use of transgenic mutants and selective pharmacological antioxidants has greatly increased understanding of the complex interplay between substrate deprivation and ischemic outcome. Recent evidence that reactive oxygen...

... in blastogenesis, a cyclical and weekly developmental phenomenon. Then the entire old generation of zooids are eliminated (resorbed) by a process that lasts 24–36 h. Administration of the antioxidant butylated hydroxytoluene (BHT) resulted in resorption being arrested by 1–8 days on average. At high doses(2.5–15.0...