Abstract

The essential function of vitamin E in vivo is not fully understood. Several studies addressed changes in the pattern of gene expression induced by vitamin E, but often did not investigate if these changes altered biochemical pathways and are eventually translated into biological function. We therefore used H-1-NMR metabolomics to investigate the biochemical effects in the liver of rats caused by long-term feeding with diets deficient (dVE; alpha-tocopherol (alpha T), <1; gamma-tocopherol (gamma T), <1; all values in mg kg(-1) diet), marginal (mVE; alpha T, 6; gamma T, 11), sufficient (sVE; alpha T, 12; gamma T, 24), or fortified with vitamin E (fVE; alpha T, 140; gamma T, 24). The concentrations of four polar hepatic metabolites were affected by the vitamin E content of the diet; glucose was lower and creatine, phosphocholine, and betaine were higher in deficient compared with rats receiving vitamin E. To achieve further biochemical insight, we investigated transcriptional changes in genes involved in the regulation of metabolic pathways related to these metabolites. Transcription of PGC1 alpha, PPAR alpha, and PPAR gamma , transcription factors controlling energy metabolism, was lower and that of the fatty acid translocase CD36 higher in animals fed vitamin E-deficient compared to those fed vitamin E-replete diets. Our data thus indicate that consumption of a vitamin E-deficient diet may alter hepatic energy metabolism in rats.

Published in

Food and Function
2015, Volume: 6, number: 4, pages: 1090-1097
Publisher: ROYAL SOC CHEMISTRY

SLU Authors

• Moazzami, Ali

  • The Department of Chemistry and Biotechnology, Swedish University of Agricultural Sciences
    

• Gobert, Antonin

  • The Department of Chemistry and Biotechnology, Swedish University of Agricultural Sciences
    

UKÄ Subject classification

Physiology


Publication identifier

DOI: https://doi.org/10.1039/c4fo00947a

Permanent link to this page (URI)

https://res.slu.se/id/publ/73445