Tactical Approaches to Interconverting GPCR Agonists and Antagonists
Peter I Dosa1, Elizabeth Ambrose Amin2
1Institute for Therapeutics Discovery and Development, Department of Medicinal Chemistry, University of Minnesota , 717 Delaware Street SE, Minneapolis, Minnesota 55414, United States.
Journal of Medicinal Chemistry
|September 22, 2015
Summary
Small structural changes to G protein-coupled receptor (GPCR) ligands can drastically alter their function, turning agonists into antagonists. Understanding these modifications helps design better GPCR drugs with desired therapeutic activity.
Area of Science:
- Medicinal Chemistry
- Pharmacology
- Drug Discovery
Background:
- G protein-coupled receptors (GPCRs) are crucial drug targets.
- Ligand structure significantly influences GPCR functional activity.
- Agonists and antagonists exhibit distinct signaling profiles.
Purpose of the Study:
- To analyze strategies for converting GPCR ligand activity (agonist, partial agonist, antagonist).
- To guide the design of GPCR-targeted drugs and probes.
- To address cases where ligands have good potency but incorrect functional activity.
Main Methods:
- Review and analysis of published approaches.
- Focus on structural modifications impacting ligand function.
- Examination of changes in functional activity versus binding affinity.
Main Results:
- Minor structural alterations can lead to significant functional interconversions (agonist to antagonist and vice versa).
- These functional shifts often occur with minimal changes in binding affinity.
- Various methods exist to modulate GPCR ligand functional outcomes.
Conclusions:
- Understanding structure-activity relationships is key for GPCR drug design.
- Targeted structural modifications can fine-tune GPCR ligand activity.
- This knowledge aids in developing precise GPCR-targeted therapeutics and research tools.
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