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Metabolic Actions of the Type 1 Cholecystokinin Receptor: Its Potential as a Therapeutic Target
Laurence J Miller1, Aditya J Desai1
1Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic, Scottsdale, AZ, 85259, USA.
Abstract:
Cholecystokinin (CCK) regulates appetite and reduces food intake by activating the type 1 CCK receptor (CCK1R). Attempts to develop CCK1R agonists for obesity have yielded active agents that have not reached clinical practice. Here we discuss why, along with new strategies to target CCK1R more effectively. We examine signaling events and the possibility of developing agents that exhibit ligand-directed bias, to dissociate satiety activity from undesirable side effects. Potential allosteric sites of modulation are also discussed, along with desired properties of a positive allosteric modulator (PAM) without intrinsic agonist action as another strategy to treat obesity. These new types of CCK1R-active drugs could be useful as standalone agents or as part of a rational drug combination for management of obesity.
Insights
New strategies aim to effectively target the cholecystokinin type 1 receptor (CCK1R) for obesity treatment. These approaches focus on ligand-directed bias and positive allosteric modulators to improve efficacy and reduce side effects.
Area of Science:
- Pharmacology
- Endocrinology
- Obesity Research
Background:
- Cholecystokinin (CCK) is a hormone that regulates appetite and food intake via the CCK type 1 receptor (CCK1R).
- Previous attempts to develop CCK1R agonists for obesity management have not succeeded in clinical practice.
Purpose of the Study:
- To explore reasons for the lack of clinical success with CCK1R agonists for obesity.
- To discuss novel strategies for more effective CCK1R targeting in obesity treatment.
Main Methods:
- Examination of CCK1R signaling pathways.
- Discussion of ligand-directed bias to separate satiety from side effects.
- Exploration of allosteric modulation and positive allosteric modulators (PAMs) without intrinsic activity.
Main Results:
- Identified challenges in developing effective CCK1R agonists.
- Proposed new therapeutic strategies focusing on biased agonism and allosteric modulation.
- Highlighted the potential of PAMs as a novel approach for obesity treatment.
Conclusions:
- Novel CCK1R-targeting drugs, including biased agonists and PAMs, offer promising avenues for obesity management.
- These agents could be used alone or in combination therapies for obesity.
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