Evidence map›Paper›PMID 27038339›Full record

ArticleThe European journal of neuroscience2016

Amphetamine elevates nucleus accumbens dopamine via an action potential-dependent mechanism that is modulated by endocannabinoids.

Dan P Covey, Kendra D Bunner, Douglas R Schuweiler, Joseph F Cheer, Paul A Garris

Open access · greenAbstract read
In one paragraph

Article in The European journal of neuroscience, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed
3.0field-weighted citation impact, top 9% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

27 citing papers in PubMed, 45 citations in OpenAlex.

  1. Review
  2. The use ofFrontiers in cell and developmental biology · 2026
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  18. Electrochemistry at the Synapse.Annual review of analytical chemistry (Palo Alto, Calif.) · 2019
    Review
  19. Dopaminergic basis for signaling belief updates, but not surprise, and the link to paranoia.Proceedings of the National Academy of Sciences of the United States of America · 2018
    Article
  20. Inhibition of endocannabinoid degradation rectifies motivational and dopaminergic deficits in the Q175 mouse model of Huntington's disease.Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology · 2018
    Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors at 3 institutions in 1 country.

Dan P CoveyDepartment of Anatomy and Neurobiology, University of Maryland School of Medicine, Baltimore, MD, USA.
Kendra D BunnerDepartment of Psychological and Brain Sciences, Indiana University, Bloomington, IN, USA.
Douglas R SchuweilerSchool of Biological Sciences, Illinois State University, 210 Julian Hall, Normal, IL, 61790-4120, USA.
Joseph F CheerDepartment of Anatomy and Neurobiology, University of Maryland School of Medicine, Baltimore, MD, USA.
Paul A GarrisSchool of Biological Sciences, Illinois State University, 210 Julian Hall, Normal, IL, 61790-4120, USA.
Illinois State University · USUniversity of Maryland, Baltimore · USIndiana University Bloomington · US

Funding

Endogenous Cannabinoid Control of Reward SubstratesR01DA022340 · NIDA · UNIVERSITY OF MARYLAND BALTIMORE · PI Joseph F Cheer · 2008 to 2026
$5.6M
INFORMATION PROCESSING IN THE NUCLEUS ACCUMBENSR01MH060131 · NIMH · UNIVERSITY OF MARYLAND BALTIMORE · PI CHEER, JOSEPH F · 2001 to 2015
$4.3M
Long-term consequences of methamphetamine toxicityR01DA024036 · NIDA · UNIVERSITY OF UTAH · PI KEEFE, KRISTEN A · 2008 to 2012
$1.7M
A Closed-Loop Microsystem for Neuromodulation of Reward CircuitryR21DA036331 · NIDA · CASE WESTERN RESERVE UNIVERSITY · PI GARRIS, PAUL A, MOHSENI, PEDRAM · 2013 to 2014
$389k
NIDA NIH HHS R01 DA022340NIDA NIH HHS R01 DA024036NIDA NIH HHS R21 DA036331NIMH NIH HHS R01 MH060131
6 · The paper itself

Abstract

The reinforcing effects of abused drugs are mediated by their ability to elevate nucleus accumbens dopamine. Amphetamine (AMPH) was historically thought to increase dopamine by an action potential-independent, non-exocytotic type of release called efflux, involving reversal of dopamine transporter function and driven by vesicular dopamine depletion. Growing evidence suggests that AMPH also acts by an action potential-dependent mechanism. Indeed, fast-scan cyclic voltammetry demonstrates that AMPH activates dopamine transients, reward-related phasic signals generated by burst firing of dopamine neurons and dependent on intact vesicular dopamine. Not established for AMPH but indicating a shared mechanism, endocannabinoids facilitate this activation of dopamine transients by broad classes of abused drugs. Here, using fast-scan cyclic voltammetry coupled to pharmacological manipulations in awake rats, we investigated the action potential and endocannabinoid dependence of AMPH-induced elevations in nucleus accumbens dopamine. AMPH increased the frequency, amplitude and duration of transients, which were observed riding on top of slower dopamine increases. Surprisingly, silencing dopamine neuron firing abolished all AMPH-induced dopamine elevations, identifying an action potential-dependent origin. Blocking cannabinoid type 1 receptors prevented AMPH from increasing transient frequency, similar to reported effects on other abused drugs, but not from increasing transient duration and inhibiting dopamine uptake. Thus, AMPH elevates nucleus accumbens dopamine by eliciting transients via cannabinoid type 1 receptors and promoting the summation of temporally coincident transients, made more numerous, larger and wider by AMPH. Collectively, these findings are inconsistent with AMPH eliciting action potential-independent dopamine efflux and vesicular dopamine depletion, and support endocannabinoids facilitating phasic dopamine signalling as a common action in drug reinforcement.

Indexed as

Action PotentialsAmphetamineAnimalsCannabinoid Receptor AntagonistsDopamineDopamine AgentsEndocannabinoidsMaleNeuronsNucleus AccumbensPiperidinesPyrazolesRatsRats, Sprague-DawleyReceptor, Cannabinoid, CB1RimonabantAmphetamineCannabinoid Receptor AntagonistsDopamineDopamine AgentsEndocannabinoidsPiperidinesPyrazolesReceptor, Cannabinoid, CB1RimonabantSodium Channel BlockersTetrodotoxinamphetaminedopamineendocannabinoidsnucleus accumbensratvoltammetry

Identifiers

PMID27038339
PMCPMC5819353
OpenAlexW2325226536

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.