Feeding of a deep-fried fat causes PPARα activation in the liver of pigs as a non-proliferating species - Research portal of Justus Liebig University Giessen:

Journal article

Feeding of a deep-fried fat causes PPARα activation in the liver of pigs as a non-proliferating species

Authors list: Luci, S; König, B; Giemsa, B; Huber, S; Hause, G; Kluge, H; Stangl, GI; Eder, K

Publication year: 2007

Pages: 872-882

Journal: British Journal of Nutrition

Volume number: 97

Issue number: 5

ISSN: 0007-1145

DOI Link: https://doi.org/10.1017/S0007114507669256

Publisher: Cambridge University Press

Abstract:
Recent studies have shown that dietary oxidised fats influence the lipid metabolism in rats by activation of PPAR alpha. In this study, we investigated whether a mildly oxidised fat causes activation of PPARa in pigs which are non-proliferators like man. Eighteen pigs were assigned to two groups and received either a diet containing 90 g/kg of a fresh fat or the same diet with 90 g/kg of an oxidised fat prepared by heating for 24 h at 180 degrees C in a deep fryer. Pigs fed the oxidised fat had a higher peroxisome count, a higher activity of catalase and a higher mRNA concentration of mitochondrial 3-hydroxy-3-methylglutaryl-CoA synthase in the liver and a higher concentration of 3-hydroxybutyrate in plasma than pigs fed the fresh fat (P< 0.05). Hepatic mRNA concentrations of acyl-CoA oxidase and carnitine palmitoyltransferase-1 tended to be increased in pigs fed the oxidised fat compared to pigs fed the fresh fat (P< 0.10). Pigs fed the oxidised fat, moreover, had higher mRNA concentrations of sterol regulatory element-binding protein (SREBP)-1 and its target genes acetyl-CoA carboxylase and stearoyl-CoA desaturase in the liver and higher mRNA concentrations of SREBP-2 and its target genes 3-hydroxy-3-methylglutary-CoA reductase and LDL receptor in liver and small intestine. In conclusion, this study shows that even a mildly oxidised fat causes activation of PPARa in the liver of pigs. Up-regulation of SREBP and its target genes in liver and small intestine suggests that the oxidised fat could stimulate synthesis of cholesterol and TAG in these tissues.

Authors/Editors

- Uni.-Prof. Dr. Klaus Josef Eder

Citation Styles

Harvard Citation style: Luci, S., König, B., Giemsa, B., Huber, S., Hause, G., Kluge, H., et al. (2007) Feeding of a deep-fried fat causes PPARα activation in the liver of pigs as a non-proliferating species, British Journal of Nutrition, 97(5), pp. 872-882. https://doi.org/10.1017/S0007114507669256

APA Citation style: Luci, S., König, B., Giemsa, B., Huber, S., Hause, G., Kluge, H., Stangl, G., & Eder, K. (2007). Feeding of a deep-fried fat causes PPARα activation in the liver of pigs as a non-proliferating species. British Journal of Nutrition. 97(5), 872-882. https://doi.org/10.1017/S0007114507669256