The importance of muscarinic receptors in domestic animal diseases and therapy: Current and future perspectives.
Authors: Abraham Getu
Journal: Veterinary journal (London, England : 1997)
Summary
Muscarinic acetylcholine receptors (mAChRs) are G protein-coupled receptors distributed throughout the central and peripheral nervous systems that regulate fundamental physiological processes, yet their specific roles in domestic animal tissues remain poorly characterised despite four decades of research. This review synthesises current literature on mAChR pharmacology, distribution, and function across multiple organ systems in animals, examining their involvement in cardiovascular, respiratory, neurological, gastrointestinal, and urological pathologies. Key therapeutic applications emerging from recent research include treatment of equine recurrent airway obstruction, glaucoma, gastric acid hypersecretion, and various gastrointestinal disturbances including colic, suggesting mAChRs represent viable pharmacological targets for managing these conditions. Understanding the subtype-specific functions of these receptors—including their roles in smooth muscle contraction, signal transduction, and neuroregulation—provides a mechanistic foundation for developing more targeted interventions with potentially fewer systemic side effects. For equine professionals, this framework highlights why cholinergic modulation remains relevant to managing respiratory, gastric, and urological disorders, and underscores the value of pursuing receptor-subtype-specific therapeutics rather than non-selective parasympathomimetic or anticholinergic agents.
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Practical Takeaways
- •Muscarinic receptor antagonists and agonists may offer targeted therapeutic options for managing equine airway disease and colic, warranting further clinical investigation
- •Understanding mAChR pharmacology and tissue distribution is important for predicting drug side effects and optimizing treatment protocols in domestic animals
- •Current research gaps in domestic animal mAChR characterization suggest opportunity for species-specific pharmacological studies to improve therapeutic efficacy
Key Findings
- •Muscarinic acetylcholine receptors (mAChRs) are G protein-coupled receptors with 40+ years of research history but limited characterization in domestic animal tissues
- •mAChRs regulate fundamental central and peripheral nervous system functions across multiple organ systems in domestic animals
- •mAChRs show therapeutic promise as drug targets for equine recurrent airway obstruction, glaucoma, and gastrointestinal disorders including colic
- •mAChR subtypes exhibit differential distribution and functions in cardiovascular, respiratory, neurological, gastrointestinal and urological systems