title: Analyzing the effects of psychotropic drugs on metabolite profiles in rat brain using 1H NMR spectroscopy.
abstract: The mechanism of action of standard drug treatments for psychiatric disorders remains fundamentally unknown, despite intensive investigation in academia and the pharmaceutical industry. So far, little is known about the effects of psychotropic medications on brain metabolism in either humans or animals. In this study, we investigated the effects of a range of psychotropic drugs on rat brain metabolites. The drugs investigated were haloperidol, clozapine, olanzapine, risperidone, aripiprazole (antipsychotics); valproate, carbamazapine (mood stabilizers) and phenytoin (antiepileptic drug). The relative concentrations of endogenous metabolites were determined using high-resolution proton nuclear magnetic resonance (1H NMR) spectroscopy. The results revealed that different classes of psychotropic drugs modulated a range of metabolites, where each drug induced a distinct neurometabolic profile. Some common responses across several drugs or within a class of drug were also observed. Antipsychotic drugs and mood stabilizers, with the exception of olanzapine, consistently increased N-acetylaspartate (NAA) levels in at least one brain area, suggesting a common therapeutic response on increased neuronal viability. Most drugs also altered the levels of several metabolites associated with glucose metabolism, neurotransmission (including glutamate and aspartate) and inositols. The heterogenic pharmacological response reflects the functional and physiological diversity of the therapeutic interventions, including side effects. Further study of these metabolites in preclinical models should facilitate the development of novel drug treatments for psychiatric disorders with improved efficacy and side effect profiles.
authors.affiliation: Department of Biomolecular Medicine, Division of SORA, Faculty of Medicine, Imperial College, London SW7 2AZ, UK.
authors.forename: Gerard A
authors.initials: GA
authors.lastname: McLoughlin
authors.forename: Dan
authors.initials: D
authors.lastname: Ma
authors.forename: Tsz M
authors.initials: TM
authors.lastname: Tsang
authors.forename: Declan N C
authors.initials: DN
authors.lastname: Jones
authors.forename: Jackie
authors.initials: J
authors.lastname: Cilia
authors.forename: Mark D
authors.initials: MD
authors.lastname: Hill
authors.forename: Melanie J
authors.initials: MJ
authors.lastname: Robbins
authors.forename: Isabel M
authors.initials: IM
authors.lastname: Benzel
authors.forename: Peter R
authors.initials: PR
authors.lastname: Maycox
authors.forename: Elaine
authors.initials: E
authors.lastname: Holmes
authors.forename: Sabine
authors.initials: S
authors.lastname: Bahn
mesh_terms: D000818:Animals; D001921:Brain / Q000187:drug effects / Q000502:physiology*; D009682:Magnetic Resonance Spectroscopy; D009836:Oligodendroglia / Q000187:drug effects / Q000502:physiology*; D011619:Psychotropic Drugs / Q000494:pharmacology*; D051381:Rats
chemical_list: D011619:Psychotropic Drugs