Journal article

Publication year: 2015

Pages: 399-410

Journal: Archives of Animal Nutrition

Volume number: 69

Issue number: 5

ISSN: 1745-039X

DOI Link: https://doi.org/10.1080/1745039X.2015.1075669

Publisher: Taylor and Francis Group

Abstract: 
In rodents, forced activation of hepatic peroxisome proliferator-activated receptor alpha (PPAR alpha) by administration of exogenous PPAR alpha activators during lactation leads to a reduction of milk triacylglycerol (TAG) production. Herein, we investigated whether a negative energy balance (NEB) induced by feed restriction (about 18% lower feed and energy intake) during lactation by increasing the release of fatty acids, which act as PPAR alpha agonists, causes a disruption of hepatic lipid metabolism and thereby impairs milk TAG production in sows. Nutrient and energy content of the milk on day 20 of lactation and gains of litters during the first 14d and the whole 21d suckling period did not differ between Control and feed-restricted sows. The mRNA concentrations of several sterol regulatory element-binding protein target genes involved in lipid synthesis in the liver and the plasma concentration of TAG were reduced in the feed-restricted sows, whereas the mRNA concentrations of PPAR alpha target genes involved in fatty acid oxidation in liver and skeletal muscle were not different between groups. In conclusion, it was shown that an NEB during lactation does not adversely affect milk composition and gains of litters, despite inhibiting hepatic expression of genes involved in lipid synthesis and reducing plasma TAG concentration. The finding that PPAR alpha target genes involved in fatty acid utilisation in liver and muscle of sows are not induced by the NEB during lactation may explain that fatty acid availability in the mammary gland is sufficient to maintain milk TAG production and to allow normal litter gain.

Harvard Citation style: Gessner, D., Gröne, B., Rosenbaum, S., Most, E., Hillen, S., Becker, S., et al. (2015) Effect of a negative energy balance induced by feed restriction in lactating sows on hepatic lipid metabolism, milk production and development of litters, Archives of Animal Nutrition = Archiv für Tierernährung , 69(5), pp. 399-410. https://doi.org/10.1080/1745039X.2015.1075669

APA Citation style: Gessner, D., Gröne, B., Rosenbaum, S., Most, E., Hillen, S., Becker, S., Erhardt, G., Reiner, G., Ringseis, R., & Eder, K. (2015). Effect of a negative energy balance induced by feed restriction in lactating sows on hepatic lipid metabolism, milk production and development of litters. Archives of Animal Nutrition = Archiv für Tierernährung . 69(5), 399-410. https://doi.org/10.1080/1745039X.2015.1075669