Jump to main content
Jump to site search

Issue 23, 2016
Previous Article Next Article

Detection of evoked acetylcholine release in mouse brain slices

Author affiliations

Abstract

The study of transmitter interactions in reward and motor pathways in the brain, including the striatum, requires methodology to detect stimulus-driven neurotransmitter release events. Such methods exist for dopamine, and have contributed to the understanding of local and behavioral factors that regulate dopamine release. However, factors that regulate release of another key transmitter in these pathways, acetylcholine (ACh), are unresolved, in part because of limited temporal and spatial resolution of current detection methods. We have optimized a voltammetric method for detection of local stimulus-evoked ACh release using enzyme-coated carbon-fiber microelectrodes and fast-scan cyclic voltammetry. These electrodes are based on the detection of H2O2 generated by the actions of acetylcholine esterase and choline oxidase, and reliably respond to ACh in a concentration-dependent manner. Methods for enzyme coating were optimized for mechanical stability that allowed for their use in ex vivo brain slices. We report here the first quantitative assessment of extracellular ACh concentration after local electrical stimulation in dorsal striatum in slices from control mice. The selective detection of ACh under these conditions was confirmed by showing that the response detected in the control slices was absent in slices from mice bred to lack ACh synthesis in the forebrain. These electrodes represent a new tool to study ACh and ACh–dopamine interactions with micrometer spatial resolution.

Graphical abstract: Detection of evoked acetylcholine release in mouse brain slices

Back to tab navigation

Publication details

The article was received on 03 Aug 2016, accepted on 16 Sep 2016 and first published on 03 Oct 2016


Article type: Paper
DOI: 10.1039/C6AN01758D
Citation: Analyst, 2016,141, 6416-6421
  •   Request permissions

    Detection of evoked acetylcholine release in mouse brain slices

    R. Asri, B. O'Neill, J. C. Patel, K. A. Siletti and M. E. Rice, Analyst, 2016, 141, 6416
    DOI: 10.1039/C6AN01758D

Search articles by author

Spotlight

Advertisements