title: Non-targeted 1H-NMR-metabolomics suggest the induction of master regulators of energy metabolism in the liver of vitamin E-deficient rats.
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 (1)H-NMR metabolomics to investigate the biochemical effects in the liver of rats caused by long-term feeding with diets deficient (dVE; α-tocopherol (αT), <1; γ-tocopherol (γT), <1; all values in mg kg(-1) diet), marginal (mVE; αT, 6; γT, 11), sufficient (sVE; αT, 12; γT, 24), or fortified with vitamin E (fVE; αT, 140; γT, 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 PGC1α, PPARα, and PPARγ, 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.
authors: Department of Chemistry and Biotechnology, Swedish University of Agricultural Sciences, P.O. Box 7015, SE-75007, Uppsala, Sweden. ali.moazzami@slu.se.
authors: Ali A
authors: AA
authors: Moazzami
authors: Sonja
authors: S
authors: Frank
authors: Antonin
authors: A
authors: Gombert
authors: Nadine
authors: N
authors: Sus
authors: Banu
authors: B
authors: Bayram
authors: Gerald
authors: G
authors: Rimbach
authors: Jan
authors: J
authors: Frank
mesh_terms: D000818:Animals; D001786:Blood Glucose / Q000378:metabolism; D002784:Cholesterol / Q000097:blood; D004032:Diet / Q000662:veterinary; D004734:Energy Metabolism; D008099:Liver / Q000378:metabolism*; D008297:Male; D055432:Metabolomics; D047493:PPAR alpha / Q000235:genetics / Q000378:metabolism; D047495:PPAR gamma / Q000235:genetics / Q000378:metabolism; D000071248:Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha; D066244:Proton Magnetic Resonance Spectroscopy; D051381:Rats; D011916:Rats, Inbred F344; D014157:Transcription Factors / Q000235:genetics / Q000378:metabolism; D014280:Triglycerides / Q000097:blood; D014810:Vitamin E / Q000008:administration & dosage / Q000097:blood*; D014811:Vitamin E Deficiency / Q000097:blood*
chemical_list: D001786:Blood Glucose; D047493:PPAR alpha; D047495:PPAR gamma; D000071248:Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha; C501429:Ppargc1a protein, rat; D014157:Transcription Factors; D014280:Triglycerides; D014810:Vitamin E; D002784:Cholesterol