Subtype-Selective Fluorescent Ligands as Pharmacological Research Tools for the Human Adenosine A2A Receptor

Comeo, Eleonora; Kindon, Nicholas D.; Soave, Mark; Stoddart, Leigh A.; Kilpatrick, Laura E.; Scammells, Peter J.; Hill, Stephen J.; Kellam, Barrie

Abstract

© 2019 American Chemical Society. Among class A G protein-coupled receptors (GPCR), the human adenosine A2A receptor (hA2AAR) remains an attractive drug target. However, translation of A2AAR ligands into the clinic has proved challenging and an improved understanding of A2AAR pharmacology could promote development of more efficacious therapies. Subtype-selective fluorescent probes would allow detailed real-time pharmacological investigations both in vitro and in vivo. In the present study, two families of fluorescent probes were designed around the known hA2AAR selective antagonist preladenant (SCH 420814). Both families of fluorescent antagonists retained affinity at the hA2AAR, selectivity over all other adenosine receptor subtypes and allowed clear visualization of specific receptor localization through confocal imaging. Furthermore, the Alexa Fluor 647-labeled conjugate allowed measurement of ligand binding affinities of unlabeled hA2AAR antagonists using a bioluminescence resonance energy transfer (NanoBRET) assay. The fluorescent ligands developed here can therefore be applied to a range of fluorescence-based techniques to further interrogate hA2AAR pharmacology and signaling.

Citation

Comeo, E., Kindon, N. D., Soave, M., Stoddart, L. A., Kilpatrick, L. E., Scammells, P. J., Hill, S. J., & Kellam, B. (2020). Subtype-Selective Fluorescent Ligands as Pharmacological Research Tools for the Human Adenosine A2A Receptor. Journal of Medicinal Chemistry, 63(5), 2656-2672. https://doi.org/10.1021/acs.jmedchem.9b01856

• Journal Article Type: Article
• Acceptance Date: Nov 8, 2019
• Online Publication Date: Dec 30, 2019
• Publication Date: Mar 12, 2020
• Deposit Date: Jan 13, 2020
• Publicly Available Date: May 1, 2020
• Journal: Journal of Medicinal Chemistry
• Print ISSN: 0022-2623
• Electronic ISSN: 1520-4804
• Publisher: American Chemical Society
• Peer Reviewed: Peer Reviewed
• Volume: 63
• Issue: 5
• Pages: 2656-2672
• DOI: https://doi.org/10.1021/acs.jmedchem.9b01856
• Keywords: Molecular Medicine; Drug Discovery
• Public URL: https://nottingham-repository.worktribe.com/output/3706208
• Publisher URL: https://pubs.acs.org/doi/full/10.1021/acs.jmedchem.9b01856