Detection and quantification of allosteric modulation of endogenous M4 muscarinic acetylcholine receptor using impedance-based label-free technology in a neuronal cell line

Chen, Amy N.Y.; Malone, Daniel T.; Pabreja, Kavita; Sexton, Patrick M.; Christopoulos, Arthur; Canals, Meritxell

Abstract

© 2014 Society for Laboratory Automation and Screening. Allosteric modulators of G protein-coupled receptors have the potential to achieve greater receptor subtype selectivity compared with ligands targeting the orthosteric site of this receptor family. However, the high attrition rate in GPCR drug discovery programs has highlighted the need to better characterize lead compounds in terms of their allosteric action, as well as the signals they elicit. Recently, the use of label-free technologies has been proposed as an approach to overcome some limitations of endpoint-based assays and detect global changes in the ligand-stimulated cell. In this study, we assessed the ability of an impedance-based label-free technology, xCELLigence, to detect allosteric modulation in a neuronal cell line natively expressing rodent M4 muscarinic acetylcholine receptors. We were able to demonstrate that positive allosteric modulation of the endogenous M4 muscarinic acetylcholine receptor can be detected using this technology. Importantly, the allosteric parameters estimated from the label-free approach are comparable to those estimated from endpoint-based assays.

• Journal Article Type: Article
• Acceptance Date: Nov 16, 2014
• Online Publication Date: Dec 22, 2014
• Publication Date: Dec 22, 2014
• Deposit Date: Jan 17, 2020
• Journal: Journal of Biomolecular Screening
• Print ISSN: 1087-0571
• Electronic ISSN: 1552-454X
• Publisher: SAGE Publications
• Peer Reviewed: Peer Reviewed
• Volume: 20
• Issue: 5
• Pages: 646-654
• DOI: https://doi.org/10.1177/1087057114563025
• Keywords: cell impedance; G protein-coupled receptor; label-free technology; muscarinic acetylcholine receptor; positive allosteric modulator; acetylcholine; agents interacting with transmitter, hormone or drug receptors; ly 2033298; muscarinic M4 receptor; unclass
• Public URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84930325584&doi=10.1177%2f1087057114563025&partnerID=40&md5=89817e8bec1d7407aeacb3e241fff950