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[Cholecystokinins and their receptors. Functional aspects]
1Rhône-Poulenc Rorer, Centre de Recherches de Vitry-Alfortville, Vitry-sur-Seine.
Therapie
|November 1, 1992
Summary
Cholecystokinin (CCK) peptides function in the gut and brain. CCK-B receptors in the brain are implicated in dopamine, pain, anxiety, and memory, suggesting CCK-B antagonists for neurological disorders.
Area of Science:
- Neuroscience
- Gastroenterology
- Pharmacology
Context:
- Cholecystokinin (CCK) is a peptide hormone with critical roles in both the gastrointestinal tract and the central nervous system.
- CCK exists in various forms, with CCK-8 being a key neurotransmitter in the brain.
- CCK exerts its effects through at least two receptor types: CCK-A and CCK-B.
Purpose:
- To differentiate the roles and distribution of CCK-A and CCK-B receptors.
- To explore the involvement of central CCK pathways in neurological functions.
- To investigate the therapeutic potential of CCK receptor antagonists.
Summary:
- CCK-A receptors are primarily peripheral, mediating digestive functions like smooth muscle contraction and enzyme secretion.
- CCK-B receptors are abundant in brain regions such as the amygdala and hippocampus, influencing dopaminergic function, pain, anxiety, and memory.
- CCK-B receptors are also found peripherally and are closely related to gastrin receptors.
Impact:
- Selective CCK-A and CCK-B receptor antagonists have been developed.
- Understanding CCK's role in the brain opens avenues for treating neuropathological conditions.
- CCK-B antagonists show promise for managing neurological disorders linked to CCK dysfunction.