Status
Public
Release Date 2017-02-02

MTBLS225: Targeted metabolomic analysis in hepatic extracts, serum, and urine of female mice gavaged with TCDD every 4 days for 28 days

Timothy R ZacharewskiRance Nault

TCDD is an environmental contaminant that elicits a number of hepatic effects including fat accumulation, inflammation, and fibrosis that can progress to hepatocellular carcinoma. RNA-Seq and targeted metabolomics were integrated with complementary dioxin response element (DRE) location and aryl hydrocarbon receptor (AhR) ChIP-Seq data to further investigate the hepatotoxicity of TCDD. Our integrative analysis identified changes similar to the Warburg effect observed in cancer cells, including pyruvate kinase isoform switching (PKM1 to PKM2), and an increase in the glutaminase (GLS1) GAC:KGA isoform ratio. Consequently, metabolites are redirected towards the pentose phosphate pathway, serine biosynthesis, and glutaminolysis. We propose that the effects of TCDD on central carbon and amino acid metabolism represents AhR-mediated hepatic metabolic reprogramming in order to increase NADPH production as an oxidative stress counter-measure.

PUBLICATIONS

Pyruvate Kinase Isoform Switching and Hepatic Metabolic Reprogramming by the Environmental...

Nault R, Fader KA, Kirby MP, Ahmed S, Matthews J, Jones AD, ...
  Published

Dose-Dependent Metabolic Reprogramming and Differential Gene Expression in TCDD-Elicited H...

Nault R, Fader KA, Ammendolia DA, Dornbos P, Potter D, Sharr...
  Published

Design Descriptors (Keywords)

2,3,7,8-tetrachlorodibenzodioxine
Dose-Response Relationship, Drug
targeted metabolites
Hepatotoxicity
liquid chromatography-tandem mass spectrometry
ultra-performance liquid chromatography-mass spectrometry

Factors

Treatment : treatment
Replicate : biological replicate
Dose : Unit of Dose Calculation