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- W2987568170 abstract "A lack of selectivity of classical agonists for the nicotinic acetylcholine receptors (nAChR) has prompted us to identify and develop a distinct scaffold of α7 nAChR-selective ligands. Noncanonical 2,4,6-substituted pyrimidine analogues were framed around compound 40 for a structure–activity relationship study. The new lead compounds activate selectively the α7 nAChRs with EC50’s between 30 and 140 nM in a PNU-120596-dependent, cell-based calcium influx assay. After characterizing the expanded lead landscape, we ranked the compounds for rapid activation using Xenopus oocytes expressing human α7 nAChR with a two-electrode voltage clamp. This approach enabled us to define the molecular determinants governing rapid activation, agonist potency, and desensitization of α7 nAChRs after exposure to pyrimidine analogues, thereby distinguishing this subclass of noncanonical agonists from previously defined types of agonists (agonists, partial agonists, silent agonists, and ago-PAMs). By NMR, we analyzed pKa values for ionization of lead candidates, demonstrating distinctive modes of interaction for this landscape of ligands." @default.
- W2987568170 created "2019-11-22" @default.
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- W2987568170 date "2019-11-01" @default.
- W2987568170 modified "2023-10-12" @default.
- W2987568170 title "Synthesis, Pharmacological Characterization, and Structure–Activity Relationships of Noncanonical Selective Agonists for α7 nAChRs" @default.
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- W2987568170 doi "https://doi.org/10.1021/acs.jmedchem.9b01467" @default.
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