Journal
CHEMMEDCHEM
Volume 13, Issue 9, Pages 944-956Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cmdc.201700787
Keywords
bivalent ligands; dopamine D-2-like receptors; ligand binding; signal transduction; -opioid receptors
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Funding
- China Scholarship Council
- Fonds voor Wetenschappelijk Onderzoek - Vlaanderen (FWO) [G021715N]
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Currently, there is mounting evidence that intermolecular receptor-receptor interactions may result in altered receptor recognition, pharmacology and signaling. Heterobivalent ligands have been proven useful as molecular probes for confirming and targeting heteromeric receptors. This report describes the design and synthesis of novel heterobivalent ligands for dopamine D-2-like receptors (D-2-likeR) and the -opioid receptor (OR) and their evaluation using ligand binding and functional assays. Interestingly, we identified a potent bivalent ligand that contains a short 18-atom linker and combines good potency with high efficacy both in -arrestin2 recruitment for OR and MAPK-P for D4R. Furthermore, this compound was characterized by a biphasic competition binding curve for the D4R-OR heterodimer, indicative of a bivalent binding mode. As this compound possibly bridges the D4R-OR heterodimer, it could be used as a pharmacological tool to further investigate the interactions of D4R and OR.
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