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Content with tag oxidative stress .
The ability of organisms to respond to environmental changes could incur physiological costs
The study, led by the Doñana Biological Station – CSIC, has been carried out with amphibian larvae. Results suggest that maintaining the machinery necessary to respond to environmental...
Increase of the benzothiazole moiety content of pheomelanin pigment after endogenous free radical inducement
Pheomelanin, the sulfurated form of melanin pigment, is known to produce reactive oxygen species (ROS) and oxidative stress-mediated cytotoxicity. Previous studies have shown a conversion of the...
Exposure to a competitive social environment activates an epigenetic mechanism that limits pheomelanin synthesis in zebra finches
Competitive environments promote high testosterone levels, oxidative stress and, consequently, impair cellular homeostasis. The regulation of genes involved in the synthesis of the pigment...
Vitamin E supplementation—but not induced oxidative stress—influences telomere dynamics during early development in wild passerines
Telomere length is a marker of cellular senescence that relates to different components of individual fitness. Oxidative stress is often claimed as a main proximate factor contributing to telomere...
Predation risk determines pigmentation phenotype in nuthatches by melanin?related gene expression effects
Pigments determine the appearance of organisms. However, pigment production can be associated to physiological constraints as in the case of pheomelanin, the sulphurated form of melanin whose...
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