Selective Fatty Acid Mobilization from Adipose Tissues of the Pheasant (Phasianus colchicus mongolicus) during Food Deprivation
| Autor: | Anne-Mari Mustonen, Reijo Käkelä, Juha Asikainen, Petteri Nieminen |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
medicine.medical_specialty
Time Factors Physiology Adipose Tissue White Adipose tissue White adipose tissue Biochemistry Pheasant Fatty Acids Monounsaturated biology.animal Internal medicine medicine Animals Galliformes chemistry.chemical_classification biology Aptenodytes Fatty Acids food and beverages Fatty acid Lipid metabolism Lipid Metabolism biology.organism_classification Dietary Fats Diet Endocrinology Liver chemistry Fatty Acids Unsaturated lipids (amino acids peptides and proteins) Animal Science and Zoology Composition (visual arts) Food Deprivation Polyunsaturated fatty acid |
| Zdroj: | Physiological and Biochemical Zoology. 82:531-540 |
| ISSN: | 1537-5293 1522-2152 |
| DOI: | 10.1086/605393 |
| Popis: | Avian response to fasting has been examined intensively in penguins (Aptenodytes spp.) adapted to long-term food deprivation but less in species experiencing shorter fasts. Thus, the selectivity in (i) incorporating different fatty acids (FA) from diet into total lipids of white adipose tissue (WAT) and liver and (ii) mobilizing FA from these tissues was examined in pheasants Phasianus colchicus mongolicus fed or fasted for 4 d. Dietary FA were selectively incorporated into intra-abdominal and subcutaneous WAT having a similar composition. The WAT lipids contained higher proportions of saturated and monounsaturated FA and less polyunsaturated FA (PUFA) than the dietary profile. However, the isomers of 20:1 and 22:1 were incorporated inefficiently into the WAT lipids. The essential C18 PUFA precursors having smaller percentages in the pheasant tissues than in the diet were likely converted into longer-chain derivatives probably utilized to a great extent for structural lipids of muscles and organs. During food deprivation, the pheasants preferentially utilized 16:1n-7, 18:3n-3, 18:1n-9, and 16:0 but preserved long-chain saturated and unsaturated FA. Mobilization was more efficient for shorter-chain FA and increased with Delta9-desaturation. The hepatic FA profile was resistant to the 4-d period of food deprivation. The results demonstrate that the incorporation of FA into WAT and their mobilization from lipid stores are selective not only in mammals but also in birds. |
| Databáze: | OpenAIRE |
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