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- W1824150473 abstract "Despite growing evidence that inhibition of α6β2-containing (α6β2*) nicotinic acetylcholine receptors (nAChRs) may be beneficial for the therapy of tobacco addiction, the lack of good sources of α6β2*-nAChRs has delayed the discovery of α6β2-selective antagonists. Our aim was to generate a cell line stably expressing functional nAChRs with α6β2 properties, to enable pharmacological characterization and the identification of novel α6β2-selective antagonists.Different combinations of the α6, β2, β3, chimeric α6/3 and mutant β3(V273S) subunits were transfected in human embryonic kidney cells and tested for activity in a fluorescent imaging plate reader assay. The pharmacology of rat immune-immobilized α6β2*-nAChRs was determined with ¹²⁵I-epibatidine binding.Functional channels were detected after co-transfection of α6/3, β2 and β3(V273S) subunits, while all other subunit combinations failed to produce agonist-induced responses. Stably expressed α6/3β2β3(V273S)-nAChR pharmacology was unique, and clearly distinct from α4β2-, α3β4-, α7- and α1β1δε-nAChRs. Antagonist potencies in inhibiting α6/3β2β3(V273S) -nAChRs was similar to their binding affinity for rat native α6β2*-nAChRs. Agonist affinities for α6β2*-nAChRs was higher than their potency in activating α6/3β2β3(V273S)-nAChRs, but their relative activities were equivalent. Focussed set screening at α6/3β2β3(V273S)-nAChRs, followed by cross-screening with the other nAChRs, led to the identification of novel α6β2-selective antagonists.We generated a mammalian cell line stably expressing nAChRs, with pharmacological properties similar to native α6β2*-nAChRs, and used it to identify novel non-peptide, low molecular weight, α6β2-selective antagonists. We also propose a pharmacophore model of α6β2 antagonists, which offers a starting point for the development of new smoking cessation agents." @default.
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- W1824150473 date "2011-04-18" @default.
- W1824150473 modified "2023-10-04" @default.
- W1824150473 title "Stable expression and functional characterization of a human nicotinic acetylcholine receptor with α6β2 properties: discovery of selective antagonists" @default.
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- W1824150473 doi "https://doi.org/10.1111/j.1476-5381.2011.01213.x" @default.
- W1824150473 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3087134" @default.
- W1824150473 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/21232042" @default.
- W1824150473 hasPublicationYear "2011" @default.
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