期刊
BRITISH JOURNAL OF NUTRITION
卷 106, 期 -, 页码 S131-S134出版社
CAMBRIDGE UNIV PRESS
DOI: 10.1017/S0007114511001826
关键词
Arachidonate; Peroxidised diet; Reproductive tissues; Total protein
资金
- Mark L. Morris Professorship of Clinical Nutrition
An opportunity to investigate a low-arachidonic acid (AA) feline diet possibly related to elevated peroxide value (PV) during storage on plasma phospholipid (PL) and reproductive tissue fatty acid (FA) profiles presented itself in the present study. Cats (nine animals per group) had been fed one of three dry extruded, complete and balanced diets for 300d before spaying. The diets contained adequate AA (0.3g/kg), similar concentration of antioxidants and were stored at ambient temperature, but differed in FA composition. The diets were designated as follows: diet A (high linoleic acid), diet B (high gamma-linolenic acid) and diet C (adequate linoleic acid). Diet samples that were obtained the week before spaying revealed an elevated PV of diet A v. diets B and C (135 v. 5.80 and 2.12meq/kg fat, respectively). Records revealed decreased food consumption of diet A cats beginning at 240d but without weight loss; thus an opportunity presented to investigate diet PV effects. Total plasma protein and PL-AA concentrations in group A were significantly decreased at 140 and 300d. Uterine and ovarian tissues collected at surgery revealed modest decrements of AA. Diet A was below minimum standards at 0.015% (minimum 0.02%), probably due to oxidation. The time at which diet A became unacceptable may have occurred between 60 and 140d because plasma PL-AA was within our normal colony range (approximately 4-7% relative) after 56d of feeding. High-linoleic acid-containing diets may be more likely to be oxidised requiring additional antioxidants. The findings suggest that reduced plasma protein in combination with plasma AA concentrations may serve as biomarkers of diet peroxidation in cats before feed refusal, weight loss or tissue depletion.
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