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Updated: May 26, 2026

Subcutaneous Administration of Muscarinic Antagonists and Triple-Immunostaining of the Levator Auris Longus Muscle in Mice
Published on: September 8, 2011
Novel muscarinic receptor mutant mouse models
1Molecular Signaling Section, Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bldg. 8A, Room B1A-05, 8 Center Drive MSC 0810, Bethesda, MD 20892-0810, USA. jwess@helix.nih.gov
Novel mutant mouse models reveal muscarinic acetylcholine receptor (mAChR) functions. These models advance understanding of mAChR roles in physiology and disease, identifying therapeutic targets for conditions like diabetes and schizophrenia.
Area of Science:
- Neuroscience
- Pharmacology
- Genetics
Background:
- Muscarinic acetylcholine receptors (mAChRs), M₁-M₅ subtypes, are crucial regulators of numerous physiological processes.
- Previous studies using whole-body knockout mice have illuminated mAChR functions in health and disease.
Purpose of the Study:
- To review a new generation of mAChR mutant mouse models.
- To explore the physiological and pathophysiological roles of individual mAChR subtypes using these advanced models.
Main Methods:
- Characterization of tissue- or cell type-specific mAChR gene-excised mice.
- Analysis of transgenic mice overexpressing wild-type or mutant M₃ mAChRs.
- Study of a novel M₃ mAChR knockin mouse strain with altered phosphorylation.
Main Results:
- Phenotypic analysis of novel mAChR mutant mice has significantly enhanced understanding of mAChR subtype functions.
- These models provide insights into the roles of mAChRs in various physiological and pathophysiological conditions.
Conclusions:
- Novel mAChR mouse models are powerful tools for dissecting receptor functions.
- These models have identified potential therapeutic targets for type 2 diabetes, schizophrenia, Parkinson's disease, cognitive disorders, and addiction.
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