title: Effect of the histone deacetylase inhibitor trichostatin a on the metabolome of cultured primary hepatocytes.
abstract: Trichostatin A (TSA) is a histone deacetylase inhibitor that has antiproliferative and differentiation-inducing effects on cancer cells, and in cultures of primary hepatocytes has been shown to maintain xenobiotic metabolic capacity. Using an NMR-based metabolic profiling approach, we evaluated if the endogenous metabolome was stabilized and the normal metabolic phenotype retained in this model. Aqueous soluble metabolites were extracted from isolated rat hepatocytes after 44 and 92 h exposure to TSA (25 muM) together with time-matched controls and measured by (1)H NMR spectroscopy. Multivariate analysis showed a clear difference in the global metabolic profile over time in control samples, while the TSA treated group was more closely clustered at both time points, suggesting that treatment reduced the time related effect on metabolism that was observed in the control. TSA treatment was associated with decreases in glycerophosphocholine, 3-hydroxybutyric acid, glycine and adenosine, an increase in glycogen, and a reduction in the decrease of inosine, hypoxanthine, and glutathione over time. Collectively, our data suggest that TSA treatment reduces the loss of a normal metabolic phenotype in cultured primary hepatocytes, improving the model as a tool to study endogenous liver metabolism, xenobiotic metabolism, and potentially affecting the accuracy of all biological assays in this system.
authors.affiliation: Biomolecular Medicine, Department of Surgery and Cancer, Faculty of Medicine, Imperial College London, Sir Alexander Fleming Building, South Kensington, London, United Kingdom.
authors.forename: James K
authors.initials: JK
authors.lastname: Ellis
authors.forename: Pui Hei
authors.initials: PH
authors.lastname: Chan
authors.forename: Tatyana
authors.initials: T
authors.lastname: Doktorova
authors.forename: Toby J
authors.initials: TJ
authors.lastname: Athersuch
authors.forename: Rachel
authors.initials: R
authors.lastname: Cavill
authors.forename: Tamara
authors.initials: T
authors.lastname: Vanhaecke
authors.forename: Vera
authors.initials: V
authors.lastname: Rogiers
authors.forename: Mathieu
authors.initials: M
authors.lastname: Vinken
authors.forename: Jeremy K
authors.initials: JK
authors.lastname: Nicholson
authors.forename: Timothy
authors.initials: T
authors.lastname: M D Ebbels
authors.forename: Hector C
authors.initials: HC
authors.lastname: Keun
mesh_terms: D000818:Animals; D002478:Cells, Cultured; D022781:Hepatocytes / Q000187:drug effects* / Q000201:enzymology*; D056572:Histone Deacetylase Inhibitors / Q000494:pharmacology*; D006655:Histone Deacetylases / Q000378:metabolism; D006877:Hydroxamic Acids / Q000494:pharmacology*; D055442:Metabolome / Q000187:drug effects*; D015999:Multivariate Analysis; D019906:Nuclear Magnetic Resonance, Biomolecular; D051381:Rats
chemical_list: D056572:Histone Deacetylase Inhibitors; D006877:Hydroxamic Acids; C012589:trichostatin A; D006655:Histone Deacetylases