Dietary antioxidants attenuate the endocrine stress response during long-duration flight of a migratory bird
| Autor: | Barbara J. Pierce, Edyta T. Sadowska, Scott R. McWilliams, Ulf Bauchinger, Lisa Trost, Amadeusz Bryła, Kristen J. DeMoranville, Stefania Casagrande, Maciej Dzialo |
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| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Hypothalamo-Hypophyseal System medicine.medical_specialty Cellular respiration Pituitary-Adrenal System Biology 010603 evolutionary biology 01 natural sciences anthocyanin Antioxidants General Biochemistry Genetics and Molecular Biology 03 medical and health sciences chemistry.chemical_compound Stress Physiological Corticosterone Internal medicine medicine Animals Endocrine system 030304 developmental biology General Environmental Science chemistry.chemical_classification 0303 health sciences Reactive oxygen species exercise Ecology General Immunology and Microbiology Catabolism corticosterone HPA axis fungi food and beverages General Medicine Metabolism Diet flight Metabolic pathway antioxidants Endocrinology chemistry Starlings Animal Migration General Agricultural and Biological Sciences Hormone |
| Zdroj: | Proc Biol Sci |
| ISSN: | 1471-2954 0962-8452 |
| DOI: | 10.1098/rspb.2020.0744 |
| Popis: | Glucocorticoids (GCs) are metabolic hormones that promote catabolic processes, which release stored energy and support high metabolic demands such as during prolonged flights of migrating birds. Dietary antioxidants (e.g. anthocyanins) support metabolism by quenching excess reactive oxygen species produced during aerobic metabolism and also by activating specific metabolic pathways. For example, similar to GCs' function, anthocyanins promote the release of stored energy, although the extent of complementarity between GCs and dietary antioxidants is not well known. If anthocyanins complement GCs functions, birds consuming anthocyanin-rich food can be expected to limit the secretion of GCs when coping with a metabolically challenging activity, avoiding the exposure to potential hormonal detrimental effects. We tested this hypothesis in European starlings ( Sturnus vulgaris ) flying in a wind tunnel. We compared levels of corticosterone, the main avian GC, immediately after a sustained flight and at rest for birds that were fed diets with or without an anthocyanin supplement. As predicted, we found (i) higher corticosterone after flight than at rest in both diet groups and (ii) anthocyanin-supplemented birds had less elevated corticosterone after flight than unsupplemented control birds. This provides novel evidence that dietary antioxidants attenuate the activation of the HPA axis (i.e. increased secretion of corticosterone) during long-duration flight. |
| Databáze: | OpenAIRE |
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