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Bioluminescence Resonance Energy Transfer Based G Protein-Activation Assay to Probe Duration of Antagonism at the Histamine H(3) Receptor

Duration of receptor antagonism, measured as the recovery of agonist responsiveness, is gaining attention as a method to evaluate the ‘effective’ target-residence for antagonists. These functional assays might be a good alternative for kinetic binding assays in competition with radiolabeled or fluor...

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Autores principales: Mocking, Tamara A. M., Buzink, Maurice C. M. L., Leurs, Rob, Vischer, Henry F.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6695674/
https://www.ncbi.nlm.nih.gov/pubmed/31366084
http://dx.doi.org/10.3390/ijms20153724
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author Mocking, Tamara A. M.
Buzink, Maurice C. M. L.
Leurs, Rob
Vischer, Henry F.
author_facet Mocking, Tamara A. M.
Buzink, Maurice C. M. L.
Leurs, Rob
Vischer, Henry F.
author_sort Mocking, Tamara A. M.
collection PubMed
description Duration of receptor antagonism, measured as the recovery of agonist responsiveness, is gaining attention as a method to evaluate the ‘effective’ target-residence for antagonists. These functional assays might be a good alternative for kinetic binding assays in competition with radiolabeled or fluorescent ligands, as they are performed on intact cells and better reflect consequences of dynamic cellular processes on duration of receptor antagonism. Here, we used a bioluminescence resonance energy transfer (BRET)-based assay that monitors heterotrimeric G protein activation via scavenging of released Venus-Gβ(1)γ(2) by NanoLuc (Nluc)-tagged membrane-associated-C-terminal fragment of G protein-coupled receptor kinase 3 (masGRK3ct-Nluc) as a tool to probe duration of G protein-coupled receptor (GPCR) antagonism. The Gα(i)-coupled histamine H(3) receptor (H(3)R) was used in this study as prolonged antagonism is associated with adverse events (e.g., insomnia) and consequently, short-residence time ligands might be preferred. Due to its fast and prolonged response, this assay can be used to determine the duration of functional antagonism by measuring the recovery of agonist responsiveness upon washout of pre-bound antagonist, and to assess antagonist re-equilibration time via Schild-plot analysis. Re-equilibration of pre-incubated antagonist with agonist and receptor could be followed in time to monitor the transition from insurmountable to surmountable antagonism. The BRET-based G protein activation assay can detect differences in the recovery of H(3)R responsiveness and re-equilibration of pre-bound antagonists between the tested H(3)R antagonists. Fast dissociation kinetics were observed for marketed drug pitolisant (Wakix(®)) in this assay, which suggests that short residence time might be beneficial for therapeutic targeting of the H(3)R.
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spelling pubmed-66956742019-09-05 Bioluminescence Resonance Energy Transfer Based G Protein-Activation Assay to Probe Duration of Antagonism at the Histamine H(3) Receptor Mocking, Tamara A. M. Buzink, Maurice C. M. L. Leurs, Rob Vischer, Henry F. Int J Mol Sci Article Duration of receptor antagonism, measured as the recovery of agonist responsiveness, is gaining attention as a method to evaluate the ‘effective’ target-residence for antagonists. These functional assays might be a good alternative for kinetic binding assays in competition with radiolabeled or fluorescent ligands, as they are performed on intact cells and better reflect consequences of dynamic cellular processes on duration of receptor antagonism. Here, we used a bioluminescence resonance energy transfer (BRET)-based assay that monitors heterotrimeric G protein activation via scavenging of released Venus-Gβ(1)γ(2) by NanoLuc (Nluc)-tagged membrane-associated-C-terminal fragment of G protein-coupled receptor kinase 3 (masGRK3ct-Nluc) as a tool to probe duration of G protein-coupled receptor (GPCR) antagonism. The Gα(i)-coupled histamine H(3) receptor (H(3)R) was used in this study as prolonged antagonism is associated with adverse events (e.g., insomnia) and consequently, short-residence time ligands might be preferred. Due to its fast and prolonged response, this assay can be used to determine the duration of functional antagonism by measuring the recovery of agonist responsiveness upon washout of pre-bound antagonist, and to assess antagonist re-equilibration time via Schild-plot analysis. Re-equilibration of pre-incubated antagonist with agonist and receptor could be followed in time to monitor the transition from insurmountable to surmountable antagonism. The BRET-based G protein activation assay can detect differences in the recovery of H(3)R responsiveness and re-equilibration of pre-bound antagonists between the tested H(3)R antagonists. Fast dissociation kinetics were observed for marketed drug pitolisant (Wakix(®)) in this assay, which suggests that short residence time might be beneficial for therapeutic targeting of the H(3)R. MDPI 2019-07-30 /pmc/articles/PMC6695674/ /pubmed/31366084 http://dx.doi.org/10.3390/ijms20153724 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Mocking, Tamara A. M.
Buzink, Maurice C. M. L.
Leurs, Rob
Vischer, Henry F.
Bioluminescence Resonance Energy Transfer Based G Protein-Activation Assay to Probe Duration of Antagonism at the Histamine H(3) Receptor
title Bioluminescence Resonance Energy Transfer Based G Protein-Activation Assay to Probe Duration of Antagonism at the Histamine H(3) Receptor
title_full Bioluminescence Resonance Energy Transfer Based G Protein-Activation Assay to Probe Duration of Antagonism at the Histamine H(3) Receptor
title_fullStr Bioluminescence Resonance Energy Transfer Based G Protein-Activation Assay to Probe Duration of Antagonism at the Histamine H(3) Receptor
title_full_unstemmed Bioluminescence Resonance Energy Transfer Based G Protein-Activation Assay to Probe Duration of Antagonism at the Histamine H(3) Receptor
title_short Bioluminescence Resonance Energy Transfer Based G Protein-Activation Assay to Probe Duration of Antagonism at the Histamine H(3) Receptor
title_sort bioluminescence resonance energy transfer based g protein-activation assay to probe duration of antagonism at the histamine h(3) receptor
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6695674/
https://www.ncbi.nlm.nih.gov/pubmed/31366084
http://dx.doi.org/10.3390/ijms20153724
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