Abstract
A series of new positive allosteric modulators (PAMs) of α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptors based on 3,7-diazabicyclo[3.3.1]nonane scaffold have been designed, synthesized, and analyzed. In electrophysiological patch clamp studies, several compounds have demonstrated a sub-nanomolar potency. Compound 4 in in vivo tests showed anti-amnestic properties in the scopolamine-induced model of amnesia in the step-through passive avoidance or maximal electroshock experiments in rats at 0.01 mg/kg showing a significant “dose-response” advantage over memantine. Based on the analysis of the flexible docking results of PAMs, the cyclothiazide-like mechanism of binding mode was suggested as the major site for the interaction with AMPA receptors.
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Abbreviations
- PAMs:
-
positive allosteric modulators
- AMPA receptors:
-
α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid receptors
- STRA:
-
step-through passive avoidance
- MES:
-
maximal electroshock
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Acknowledgments
The animal facilities and equipment of the “Centre for Collective Use of IPAC RAS” were used.
Funding
Molecular modeling and docking studies were supported by Russian Science Foundation grant no. 17-15-01455. Biological part of the study was supported by the IPAC RAS State Targets Project no. 0090-2019-0005.
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All experiments were approved by the Institutional Animal Review Board and were conducted in accordance with the Russian law “On Establishing Rules of Good Laboratory Practice” (23.09.2010, no. 708n).
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Lavrov, M.I., Karlov, D.S., Voronina, T.A. et al. Novel Positive Allosteric Modulators of AMPA Receptors Based on 3,7-Diazabicyclo[3.3.1]nonane Scaffold. Mol Neurobiol 57, 191–199 (2020). https://doi.org/10.1007/s12035-019-01768-6
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DOI: https://doi.org/10.1007/s12035-019-01768-6