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  Emotionalcognitive processing and brain metabolism after pharmacological challenge with ketamine

Grimm, S., Scheidegger, M., Henning, A., Walter, M., Weigand, A., Böker, H., et al. (2011). Emotionalcognitive processing and brain metabolism after pharmacological challenge with ketamine. Pharmacopsychiatry, 21(6), A41.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-B8EA-B Version Permalink: http://hdl.handle.net/21.11116/0000-0002-5238-3
Genre: Meeting Abstract

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 Creators:
Grimm, S, Author
Scheidegger, M, Author
Henning, A1, Author              
Walter, M, Author              
Weigand, A, Author
Böker, H, Author
Bajbouj, M, Author
Seifritz, E, Author
Affiliations:
1Institute for Biomedical Engineering, ETH Zürich, ou_persistent22              

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 Abstract: Ketamine is a potent glutamatergic NMDA receptor antagonist with rapid antidepressant properties, thus providing a valuable research tool for the investigation of the neurobiology of major depressive disorder (MDD). Increasing evidence underscores the role of glutamate dependent neuroplasticity and glutamatergic neurotransmission and metabolism in the pathophysiology of MDD. This multimodal imaging study in 23 healthy subjects aimed at probing the neuropharmacological effects of a single ketamine infusion on fMRI-BOLD responses during emotional/cognitive processing and their relationship to glutamatergic metabolite concentrations assessed by proton magnetic resonance spectroscopy (1H-MRS). During emotional processing there was a brain region-specific increase in negative BOLD responses (NBRs) following ketamine administration. The most significant BOLD differences were found in predominantly limbic brain areas associated with the processing of emotional information and higher-order mental functions. During cognitive processing there was a significant ketamine effect on NBRs in anterior, but not posterior regions of the default- mode network. A strong correlation between glutamate, glutamine, GABA as well as glutamine/glutamate ratios (a putative marker for glutamatergic neurotransmission) and NBRs could be found after ketamine administration.

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 Dates: 2011-12
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1055/s-0031-1292482
BibTex Citekey: GrimmSHWWBBS2011
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Title: 27. Symposium der Arbeitsgemeinschaft für Neuropsychopharmakologie und Pharmakopsychiatrie (AGNP)
Place of Event: München, Germany
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Title: Pharmacopsychiatry
Source Genre: Journal
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Publ. Info: Stuttgart : Thieme
Pages: - Volume / Issue: 21 (6) Sequence Number: - Start / End Page: A41 Identifier: ISSN: 0176-3679
CoNE: https://pure.mpg.de/cone/journals/resource/954925487778