Abstract:
:Clinical and experimental studies indicate that muscarinic acetylcholine receptors are potential pharmacological targets for the treatment of neurological diseases. Although these receptors have been described in human, bovine and rat cerebral microvascular tissue, a subtype functional characterization in mouse brain endothelium is lacking. Here, we show that all muscarinic acetylcholine receptors (M1-M5) are expressed in mouse brain microvascular endothelial cells. The mRNA expression of M2, M3, and M5 correlates with their respective protein abundance, but a mismatch exists for M1 and M4 mRNA versus protein levels. Acetylcholine activates calcium transients in brain endothelium via muscarinic, but not nicotinic, receptors. Moreover, although M1 and M3 are the most abundant receptors, only a small fraction of M1 is present in the plasma membrane and functions in ACh-induced Ca2+ signaling. Bioinformatic analyses performed on eukaryotic muscarinic receptors demonstrate a high degree of conservation of the orthosteric binding site and a great variability of the allosteric site. In line with previous studies, this result indicates muscarinic acetylcholine receptors as potential pharmacological targets in future translational studies. We argue that research on drug development should especially focus on the allosteric binding sites of the M1 and M3 receptors.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Radu BM,Osculati AMM,Suku E,Banciu A,Tsenov G,Merigo F,Di Chio M,Banciu DD,Tognoli C,Kacer P,Giorgetti A,Radu M,Bertini G,Fabene PFdoi
10.1038/s41598-017-05384-zsubject
Has Abstractpub_date
2017-07-11 00:00:00pages
5083issue
1issn
2045-2322pii
10.1038/s41598-017-05384-zjournal_volume
7pub_type
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