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Methods for Evaluation of Positive Allosteric Modulators of Glutamate AMPA Receptors

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Patch-Clamp Methods and Protocols

Part of the book series: Methods in Molecular Biology™ ((MIMB,volume 403))

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Summary

Hypofunctioning of glutamate synaptic transmission in the central nervous system (CNS) has been proposed as a factor that may contribute to cognitive deficits associated with various neurological and psychiatric disorders. Positive allosteric modulation of the α-amino-3-hydroxy-5-methyl-4-isoxazoleproprionic acid (AMPA) subtype of glutamate receptors has been proposed as a novel therapeutic approach, because these receptors mediate the majority of rapid excitatory neurotransmission and are intimately involved in long-term changes in synaptic plasticity thought to underlie mnemonic processing. By definition, positive allosteric modulators do not affect AMPA receptor activity alone but can markedly enhance ion flux through the ion channel pore in the presence of bound agonist. Despite this commonality, positive allosteric modulators can be segregated on the basis of the preferential effects on AMPA receptor subunits, their alternatively spliced variants and/or their biophysical mechanism of action. This chapter provides a detailed description of the methodologies used to evaluate the potency/efficacy and biophysical mechanism of action of positive allosteric modulators of AMPA receptors.

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Acknowledgements

The authors thank Mark Fleck PhD and Elizabeth Cornell for assistance with the outside-out patch recording technique.

Authors
  1. Edward R. Siuda
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  2. Jennifer C. Quirk
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  3. Eric S. Nisenbaum
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Editor information

Peter Molnar James J. Hickman

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© 2007 Humana Press Inc.

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Siuda, E.R., Quirk, J.C., Nisenbaum, E.S. (2007). Methods for Evaluation of Positive Allosteric Modulators of Glutamate AMPA Receptors. In: Molnar, P., Hickman, J.J. (eds) Patch-Clamp Methods and Protocols. Methods in Molecular Biology™, vol 403. Humana Press. https://doi.org/10.1007/978-1-59745-529-9_3

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  • DOI: https://doi.org/10.1007/978-1-59745-529-9_3

  • Publisher Name: Humana Press

  • Print ISBN: 978-1-58829-698-6

  • Online ISBN: 978-1-59745-529-9

  • eBook Packages: Springer Protocols

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