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Muscarinic acetylcholine receptors (mAChRs) are acetylcholine receptors that form G protein-coupled receptor complexes in the cell membranes of certain neurons [1] and other cells. They play several roles, including acting as the main end-receptor stimulated by acetylcholine released from postganglionic fibers .
The muscarinic M 3 receptor regulates insulin secretion from the pancreas [7] and are an important target for understanding the mechanisms of type 2 diabetes mellitus. Some antipsychotic drugs that are prescribed to treat schizophrenia and bipolar disorder (such as olanzapine and clozapine) have a high risk of diabetes side-effects.
The muscarinic acetylcholine receptor M 1, also known as the cholinergic receptor, muscarinic 1, is a muscarinic receptor that in humans is encoded by the CHRM1 gene. [5] It is localized to 11q13. [5] This receptor is found mediating slow EPSP at the ganglion in the postganglionic nerve, [6] is common in exocrine glands and in the CNS. [7] [8]
A muscarinic acetylcholine receptor agonist, also simply known as a muscarinic agonist or as a muscarinic agent, is an agent that activates the activity of the muscarinic acetylcholine receptor. [1] The muscarinic receptor has different subtypes, labelled M1-M5, allowing for further differentiation.
The muscarinic acetylcholine receptor M 2, also known as the cholinergic receptor, muscarinic 2, is a muscarinic acetylcholine receptor that in humans is encoded by the CHRM2 gene. [5] Multiple alternatively spliced transcript variants have been described for this gene. [5] It is G i-coupled, reducing intracellular levels of cAMP.
Muscarinic acetylcholine receptors can be blocked by the drugs atropine and scopolamine. Congenital myasthenic syndrome (CMS) is an inherited neuromuscular disorder caused by defects of several types at the neuromuscular junction. Postsynaptic defects are the most frequent cause of CMS and often result in abnormalities in nicotinic ...
12672 Ensembl ENSG00000180720 ENSMUSG00000040495 UniProt P08173 P32211 RefSeq (mRNA) NM_000741 NM_001366692 NM_007699 RefSeq (protein) NP_000732 NP_001353621 NP_031725 Location (UCSC) Chr 11: 46.38 – 46.39 Mb Chr 2: 91.76 – 91.76 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse The muscarinic acetylcholine receptor M 4, also known as the cholinergic receptor, muscarinic 4 (CHRM4 ...
Muscarinic receptors mediate many of the effects of acetylcholine in the central and peripheral nervous system. The clinical implications of this receptor have not been fully explored; however, stimulation of this receptor is known to effectively decrease cyclic AMP levels and downregulate the activity of protein kinase A (PKA).