The effect of muscle phospholipid fatty acid composition on exercise performance: a direct test in the migratory white-throated sparrow (Zonotrichia albicollis).

摘要

Dietary polyunsaturated fatty acids (PUFA) can have various effects on animal physiology through their roles as energy, structural, regulatory, and signaling molecules. Of recent interest has been the incorporation of dietary PUFA into muscle membranes as phospholipids, thereby potentially affecting exercise performance by mechanisms such as altered mitochondrial proton leak and membrane-bound protein activity. We first studied the effects of a high-omega6 PUFA diet vs. a high-omega3 PUFA diet on peak metabolic rate (PMR) in white-throated sparrows, and additionally measured mRNA expression of fatty acid transporters and the activity of major oxidative enzymes. Our experiment, thus, allowed a test of the "natural doping