ORIGINAL PAPER
Dietary fat type and level affect thyroid hormone plasma concentrations in rats
1 |
Warsaw University of Life Sciences (SGGW),
Department of Dietetics, Faculty of Human Nutrition and Consumer Sciences,
Nowoursynowska 159c, 02-776 Warsaw, Poland |
2 |
Nencki Institute of Experimental Biology, Department of Cellular Biochemistry,
Pasteura 3, 02-093 Warsaw, Poland |
J. Anim. Feed Sci. 2009;18(3):541–550
Publication date: 2009-06-24
KEYWORDS
ABSTRACT
The objective of the study was to examine the effect of dietary fat source and level on plasma thyroid hormone concentrations. For three weeks, male Wistar rats (n=54) were fed diets containing fats differing in fatty acid (FA) composition: sunflower oil predominantly containing polyunsaturated n-6 FA, group S; rich in monounsaturated FA rape seed oil, group R; and saturated FA palm oil, group P; at three levels (w/w): 5% LF, 10% MF, and 20% HF. Total thyroxine levels were higher in group P than R on the LF and MF diets. The free thyroxine concentration in rats on the LF diet was higher in group R than in S and P; on the MF diet, higher in group R and P than S; and on the HF diet, higher in group P than S. Triiodothyronine levels were influenced by fat composition only in rats fed the HF diet, being lower in group S than P. The results of this study suggest that diets differing with respect to fat type and level might have opposite effects on thyroid hormone values.
CORRESPONDING AUTHOR
D. Rosołowska-Huszcz
Warsaw University of Life Sciences (SGGW),
Department of Dietetics, Faculty of Human Nutrition and Consumer Sciences,
Nowoursynowska 159c, 02-776 Warsaw, Poland
CITATIONS (2):
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Dietary vegetable oils inclusion on the performance, hormonal levels and hsp 70 gene expression in broilers under heat stress Ali Tari, Ali Sadeghi, Seyed Mousavi Acta Scientiarum. Animal Sciences
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2. |
The Effects of Different Oil Sources on Performance, Digestive Enzymes, Carcass Traits, Biochemical, Immunological, Antioxidant, and Morphometric Responses of Broiler Chicks Youssef Attia, Mohammed Al-Harthi, El-Maaty Abo Frontiers in Veterinary Science
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