Novel Molecule Exhibiting Selective Affinity for GABAA Receptor Subtypes

Abstract Aminoquinoline derivatives were evaluated against a panel of receptors/channels/transporters in radioligand binding experiments. One of these derivatives (DCUK-OEt) displayed micromolar affinity for brain γ-aminobutyric acid type A (GABAA) receptors. DCUK-OEt was shown to be a positive allo...

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Autores principales:	Cecilia M. Borghese, Melissa Herman, Lawrence D. Snell, Keri J. Lawrence, Hyun-Young Lee, Donald S. Backos, Lauren A. Vanderlinden, R. Adron Harris, Marisa Roberto, Paula L. Hoffman, Boris Tabakoff
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/deb9d0e8116a4679aa8f5c369a838e42
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spelling	oai:doaj.org-article:deb9d0e8116a4679aa8f5c369a838e422021-12-02T11:40:21ZNovel Molecule Exhibiting Selective Affinity for GABAA Receptor Subtypes10.1038/s41598-017-05966-x2045-2322https://doaj.org/article/deb9d0e8116a4679aa8f5c369a838e422017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-05966-xhttps://doaj.org/toc/2045-2322Abstract Aminoquinoline derivatives were evaluated against a panel of receptors/channels/transporters in radioligand binding experiments. One of these derivatives (DCUK-OEt) displayed micromolar affinity for brain γ-aminobutyric acid type A (GABAA) receptors. DCUK-OEt was shown to be a positive allosteric modulator (PAM) of GABA currents with α1β2γ2, α1β3γ2, α5β3γ2 and α1β3δ GABAA receptors, while having no significant PAM effect on αβ receptors or α1β1γ2, α1β2γ1, α4β3γ2 or α4β3δ receptors. DCUK-OEt modulation of α1β2γ2 GABAA receptors was not blocked by flumazenil. The subunit requirements for DCUK-OEt actions distinguished DCUK-OEt from other currently known modulators of GABA function (e.g., anesthetics, neurosteroids or ethanol). Simulated docking of DCUK-OEt at the GABAA receptor suggested that its binding site may be at the α + β- subunit interface. In slices of the central amygdala, DCUK-OEt acted primarily on extrasynaptic GABAA receptors containing the α1 subunit and generated increases in extrasynaptic “tonic” current with no significant effect on phasic responses to GABA. DCUK-OEt is a novel chemical structure acting as a PAM at particular GABAA receptors. Given that neurons in the central amygdala responding to DCUK-OEt were recently identified as relevant for alcohol dependence, DCUK-OEt should be further evaluated for the treatment of alcoholism.Cecilia M. BorgheseMelissa HermanLawrence D. SnellKeri J. LawrenceHyun-Young LeeDonald S. BackosLauren A. VanderlindenR. Adron HarrisMarisa RobertoPaula L. HoffmanBoris TabakoffNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-13 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Cecilia M. Borghese Melissa Herman Lawrence D. Snell Keri J. Lawrence Hyun-Young Lee Donald S. Backos Lauren A. Vanderlinden R. Adron Harris Marisa Roberto Paula L. Hoffman Boris Tabakoff Novel Molecule Exhibiting Selective Affinity for GABAA Receptor Subtypes
description	Abstract Aminoquinoline derivatives were evaluated against a panel of receptors/channels/transporters in radioligand binding experiments. One of these derivatives (DCUK-OEt) displayed micromolar affinity for brain γ-aminobutyric acid type A (GABAA) receptors. DCUK-OEt was shown to be a positive allosteric modulator (PAM) of GABA currents with α1β2γ2, α1β3γ2, α5β3γ2 and α1β3δ GABAA receptors, while having no significant PAM effect on αβ receptors or α1β1γ2, α1β2γ1, α4β3γ2 or α4β3δ receptors. DCUK-OEt modulation of α1β2γ2 GABAA receptors was not blocked by flumazenil. The subunit requirements for DCUK-OEt actions distinguished DCUK-OEt from other currently known modulators of GABA function (e.g., anesthetics, neurosteroids or ethanol). Simulated docking of DCUK-OEt at the GABAA receptor suggested that its binding site may be at the α + β- subunit interface. In slices of the central amygdala, DCUK-OEt acted primarily on extrasynaptic GABAA receptors containing the α1 subunit and generated increases in extrasynaptic “tonic” current with no significant effect on phasic responses to GABA. DCUK-OEt is a novel chemical structure acting as a PAM at particular GABAA receptors. Given that neurons in the central amygdala responding to DCUK-OEt were recently identified as relevant for alcohol dependence, DCUK-OEt should be further evaluated for the treatment of alcoholism.
format	article
author	Cecilia M. Borghese Melissa Herman Lawrence D. Snell Keri J. Lawrence Hyun-Young Lee Donald S. Backos Lauren A. Vanderlinden R. Adron Harris Marisa Roberto Paula L. Hoffman Boris Tabakoff
author_facet	Cecilia M. Borghese Melissa Herman Lawrence D. Snell Keri J. Lawrence Hyun-Young Lee Donald S. Backos Lauren A. Vanderlinden R. Adron Harris Marisa Roberto Paula L. Hoffman Boris Tabakoff
author_sort	Cecilia M. Borghese
title	Novel Molecule Exhibiting Selective Affinity for GABAA Receptor Subtypes
title_short	Novel Molecule Exhibiting Selective Affinity for GABAA Receptor Subtypes
title_full	Novel Molecule Exhibiting Selective Affinity for GABAA Receptor Subtypes
title_fullStr	Novel Molecule Exhibiting Selective Affinity for GABAA Receptor Subtypes
title_full_unstemmed	Novel Molecule Exhibiting Selective Affinity for GABAA Receptor Subtypes
title_sort	novel molecule exhibiting selective affinity for gabaa receptor subtypes
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/deb9d0e8116a4679aa8f5c369a838e42
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Novel Molecule Exhibiting Selective Affinity for GABAA Receptor Subtypes

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