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Ligand-Based Discovery of a New Scaffold for Allosteric Modulation of the ?-Opioid Receptor.

ABSTRACT: With the hope of discovering effective analgesics with fewer side effects, attention has recently shifted to allosteric modulators of the opioid receptors. In the past two years, the first chemotypes of positive or silent allosteric modulators (PAMs or SAMs, respectively) of ?- and ?-opioid receptor types have been reported in the literature. During a structure-guided lead optimization campaign with ?-PAMs BMS-986121 and BMS-986122 as starting compounds, we discovered a new chemotype that was confirmed to display ?-PAM or ?-SAM activity depending on the specific substitutions as assessed by endomorphin-1-stimulated ?-arrestin2 recruitment assays in Chinese Hamster Ovary (CHO)-? PathHunter cells. The most active ?-PAM of this series was analyzed further in competition binding and G-protein activation assays to understand its effects on ligand binding and to investigate the nature of its probe dependence.

SUBMITTER: Bisignano P 

PROVIDER: S-EPMC4703110 | biostudies-literature | 2015 Sep

REPOSITORIES: biostudies-literature

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Ligand-Based Discovery of a New Scaffold for Allosteric Modulation of the μ-Opioid Receptor.

Bisignano Paola P   Burford Neil T NT   Shang Yi Y   Marlow Brennica B   Livingston Kathryn E KE   Fenton Abigail M AM   Rockwell Kristin K   Budenholzer Lauren L   Traynor John R JR   Gerritz Samuel W SW   Alt Andrew A   Filizola Marta M  

Journal of chemical information and modeling 20150915 9

With the hope of discovering effective analgesics with fewer side effects, attention has recently shifted to allosteric modulators of the opioid receptors. In the past two years, the first chemotypes of positive or silent allosteric modulators (PAMs or SAMs, respectively) of μ- and δ-opioid receptor types have been reported in the literature. During a structure-guided lead optimization campaign with μ-PAMs BMS-986121 and BMS-986122 as starting compounds, we discovered a new chemotype that was co  ...[more]

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