She, Xueke and Pegoli, Andrea and Mayr, Judith and Huebner, Harald and Bernhardt, Guenther and Gmeiner, Peter and Keller, Max (2017) Heterodimerization of Dibenzodiazepinone-Type Muscarinic Acetylcholine Receptor Ligands Leads to Increased M2R Affinity and Selectivity. ACS OMEGA, 2 (10). pp. 6741-6754. ISSN 2470-1343,
Full text not available from this repository. (Request a copy)Abstract
In search for selective ligands for the muscarinic acetylcholine receptor (MR) subtype M-2, the dimeric ligand approach, that is combining two pharmacophores in one and the same molecule, was pursued. Different types (agonists, antagonists, orthosteric, and allosteric) of monomeric MR ligands were combined by various linkers with a dibenzodia-zepinone-type MR antagonist, affording five types of heterodimeric compounds ("DIBA-xanomeline," "DIBA-TBPB," "DIBA-77-LH-28-1," "DIBA-propantheline," and "DIBA-4-DAMP"), which showed high M2R affinities (pK(i) > 8.3). The heterodimeric ligand UR-SK75 (46) exhibited the highest M2R affinity and selectivity [pK(i) (M1R-M5R): 8.84, 10.14, 7.88, 8.59, and 7.47]. Two tritium-labeled dimeric derivatives ("DIBA-xanomeline"-type: [H-3] UR-SK71 ([H-3]44) and "DIBA-TBPB"-type: [H-3] UR-SK59 ([H-3] 64)) were prepared to investigate their binding modes at hM(2)R. Saturation-binding experiments showed that these compounds address the orthosteric binding site of the M2R. The investigation of the effect of various allosteric MR modulators [gallamine (13), W84 (14), and LY2119620 (15)] on the equilibrium (13-15) or saturation (14) binding of [H-3] 64 suggested a competitive mechanism between [H-3] 64 and the investigated allosteric ligands, and consequently a dualsteric binding mode of 64 at the M2R.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | PROTEIN-COUPLED RECEPTORS; ALLOSTERIC BINDING-SITES; BITOPIC LIGANDS; RESIDENCE TIME; HIGHLY POTENT; M-2 RECEPTOR; ANTAGONIST; AGONISTS; MODULATORS; DESIGN; |
| Subjects: | 600 Technology > 615 Pharmacy |
| Divisions: | Chemistry and Pharmacy > Institute of Pharmacy |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 14 Dec 2018 13:19 |
| Last Modified: | 20 Feb 2019 11:02 |
| URI: | https://pred.uni-regensburg.de/id/eprint/2033 |
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