Keller, Max and Kaske, Melanie and Holzammer, Tobias and Bernhardt, Guenther and Buschauer, Armin (2013) Dimeric argininamide-type neuropeptide Y receptor antagonists: Chiral discrimination between Y-1 and Y-4 receptors. BIOORGANIC & MEDICINAL CHEMISTRY, 21 (21). pp. 6303-6322. ISSN 0968-0896, 1464-3391
Full text not available from this repository. (Request a copy)Abstract
The structurally related peptides neuropeptide Y (NPY), peptide YY (PYY) and pancreatic polypeptide (PP) are endogenous agonists of the NPY receptor (YR) family, which in humans comprises four functionally expressed subtypes, designated Y1R, Y2R, Y4R and Y5R. Nonpeptide antagonists with high affinity and selectivity have been described for the Y1R, Y2R and Y5R, but such compounds are still lacking for the Y4R. In this work, the structures of the high affinity selective (R)-argininamide-type Y1R antagonists BIBP3226 and BIBO3304 were linked via the guanidine or urea moieties to give homo-dimeric argininamides with linker lengths ranging from 31 to 41 atoms. Interestingly, the twin compounds proved to be by far less selective for the Y1R than the R-configured monovalent parent compounds. The decrease in selectivity ratio was most pronounced for Y1R versus Y4R subtype, resulting in comparable affinities of bivalent ligands for Y1R and Y4R (e.g. UR-MK177 ((R, R)-49): K-i = 230 nM (Y1R) and 290 nM (Y4R)). With a Ki value of 130 nM and a K-b value of 20 nM, UR-MK188 ((R,R)-51) was superior to all Y4R antagonists known to date. The S, S-configured optical antipodes of UR-MK177 and UR-MK188 (UR-MEK381 ((S, S)-49) and UR-MEK388 ((S,S)-51)) were synthesized to investigate the stereochemical discrimination by the different receptor subtypes. Whereas preference for R, R-configured argininamides was characteristic of the Y1R, stereochemical discrimination by the Y4R was not observed. This may pave the way to selective Y4R antagonists. (C) 2013 Elsevier Ltd. All rights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ACYLGUANIDINE BIOISOSTERIC APPROACH; HIGHLY POTENT; SUBTYPE SELECTIVITY; NPY Y-2; AFFINITY; LIGANDS; RADIOLIGAND; Neuropeptide Y; NPY Y-1 receptor antagonist; Y-4 receptor antagonist; Bivalent ligand; Dimeric argininamide derivatives |
| Subjects: | 600 Technology > 615 Pharmacy |
| Divisions: | Chemistry and Pharmacy > Institute of Pharmacy > Pharmaceutical/Medicinal Chemistry II (Prof. Buschauer) |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 27 Mar 2020 07:41 |
| Last Modified: | 27 Mar 2020 07:41 |
| URI: | https://pred.uni-regensburg.de/id/eprint/15805 |
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