Modelling of amino acid turnover in the horse during training and racing: A basis for developing a novel supplementation strategy
| Autor: | Timothy K. Roberts, David L. A. Wood, R. Hugh Dunstan, Brittany Thorn, Margaret M. Macdonald |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0301 basic medicine
Nitrogen balance Anabolism Physiology Protein metabolism Phenylalanine 030204 cardiovascular system & hematology Urine Biochemistry chemistry.chemical_compound 0302 clinical medicine Medicine and Health Sciences Serine Homeostasis Food science Amino Acids Sweat Protein Metabolism chemistry.chemical_classification Mammals Multidisciplinary Organic Compounds Eukaryota Ornithine Amino acid Body Fluids Chemistry Vertebrates Physical Sciences Medicine Anatomy Basic Amino Acids Research Article Nitrogen Science Equines Excretion 03 medical and health sciences Valine Physical Conditioning Animal Hydroxyl Amino Acids Animals Computer Simulation Histidine Horses Organic Chemistry Organisms Chemical Compounds Biology and Life Sciences Proteins Models Theoretical Glutamine Amino Acid Metabolism 030104 developmental biology Metabolism chemistry Dietary Supplements Amniotes Physiological Processes |
| Zdroj: | PLoS ONE, Vol 15, Iss 1, p e0226988 (2020) PLoS ONE |
| ISSN: | 1932-6203 |
| Popis: | Horses in heavy training in preparation for racing and competition have increased metabolic demands to support the more intensive levels of exercise and recovery. However, little is known at the metabolic level about amino acid turnover and the specific alterations of demand caused by high intensity exercise. During exercise, certain amino acids are required in greater quantities due to disproportionate losses via excretory systems and usage in biosynthetic pathways. This investigation has built a theoretical computer model in an attempt to bring together the published rates of protein intake and utilisation to try to understand how some amino acids might be in higher demand than others. The model indicated that after evaluation of the daily amino acid turnover, glutamine/glutamic acid (Glx), serine and ornithine were in negative nitrogen balance which identified these amino acids as critical limiting factors for anabolism. Adjustment of the modelling conditions to cater for high intensity training indicated that an additional demand was placed on eight amino acids, including GLx, valine, lysine, histidine and phenylalanine which could thus become limiting under these conditions. The modelling results indicated that an amino acid supplement with the correct amino acids to match demand could theoretically be beneficial to a 500Kg horse in quantities of 20-80g/day. These results open new avenues of research for specifically tailoring amino acid supplementation to meet demands for sports horses in heavy training and improving general well-being, especially in hotter climates. |
| Databáze: | OpenAIRE |
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