Keyword search (3,447 papers available)


Why did the kitten cross the road? A meditation on positive versus negative reinforcement in addiction.

Author(s): Leyton M

J Psychiatry Neurosci. 2021 Jan 21; 46(1):E184-E185 Authors: Leyton M PMID: 33497168 [PubMed - as supplied by publisher]

Article GUID: 33497168
Metabotropic glutamate type 5 receptor binding availability during dextroamphetamine sensitization in mice and humans.

Author(s): Smart K, Nagano-Saito A, Milella MS, Sakae DY, Favier M, Vigneault E, Louie L, Hamilton A, Ferguson SSG, Rosa-Neto P, Narayanan S, El Mestik...

J Psychiatry Neurosci. 2020 Jun 19;45(4):190162 Authors: Smart K, Nagano-Saito A, Milella MS, Sakae DY, Favier M, Vigneault E, Louie L, Hamilton A, Ferguson SSG, Rosa-Neto P, Narayanan S, El Mesti...

Article GUID: 32559027
Cannabis legalization: Did we make a mistake? Update 2019

Author(s): Leyton M

J Psychiatry Neurosci. 2019 Sep 01;44(5):291-293 Authors: Leyton M PMID: 31452361 [PubMed - in process]

Article GUID: 31452361
Legalizing marijuana.

Author(s): Leyton M

J Psychiatry Neurosci. 2016 Mar;41(2):75-6 Authors: Leyton M PMID: 26898727 [PubMed - indexed for MEDLINE]

Article GUID: 26898727
Cocaine cue-induced dopamine release in the human prefrontal cortex.

Author(s): Milella MS, Fotros A, Gravel P, Casey KF, Larcher K, Verhaeghe JA, Cox SM, Reader AJ, Dagher A, Benkelfat C, Leyton M

J Psychiatry Neurosci. 2016 08;41(5):322-30 Authors: Milella MS, Fotros A, Gravel P, Casey KF, Larcher K, Verhaeghe JA, Cox SM, Reader AJ, Dagher A, Benkelfat C, Leyton M

Article GUID: 26900792
Are people with psychiatric disorders violent?

Author(s): Leyton M

J Psychiatry Neurosci. 2018 Apr 24;43(4):180058 Authors: Leyton M PMID: 29688170 [PubMed - as supplied by publisher]

Article GUID: 29688170
Are people with psychiatric disorders violent?

Author(s): Leyton M

J Psychiatry Neurosci. 2018 Jul;43(4):220-222 Authors: Leyton M PMID: 29947604 [PubMed - in process]

Article GUID: 29947604
Neuroimaging tests for clinical psychiatry: Are we there yet?

Author(s): Leyton M, Kennedy SH

J Psychiatry Neurosci. 2017 06;42(4):219-221 Authors: Leyton M, Kennedy SH PMID: 28639935 [PubMed - indexed for MEDLINE]

Article GUID: 28639935
A longitudinal, epigenome-wide study of DNA methylation in anorexia nervosa: results in actively ill, partially weight-restored, long-term remitted and non-eating-disordered women

Author(s): Steiger H, Booij L, Kahan `, McGregor K, Thaler L, Fletcher E, Labbe A, Joober R, Israël M, Szyf M, Agellon LB, Gauvin L, St-Hilaire A, Rossi E

J Psychiatry Neurosci. 2019 05 01;44(3):205-213 Authors: Steiger H, Booij L, Kahan `, McGregor K, Thaler L, Fletcher E, Labbe A, Joober R, Israël M, Szyf M, Agellon LB, Gauvin L, St-Hilaire A, Rossi E

Article GUID: 30693739
Title:Cocaine cue-induced dopamine release in the human prefrontal cortex.
Authors:Milella MS,  Fotros A,  Gravel P,  Casey KF,  Larcher K,  Verhaeghe JA,  Cox SM,  Reader AJ,  Dagher A,  Benkelfat C,  Leyton M
Link:https://www.ncbi.nlm.nih.gov/pubmed/26900792?dopt=Abstract
DOI:10.1503/jpn.150207
Category:J Psychiatry Neurosci
PMID:26900792
Dept Affiliation: CSBN
1 From the Department of Psychiatry, McGill University, Montreal, Que. Canada (Milella, Cox, Benkelfat, Leyton); the Department of Psychiatry, University of California San Diego, San Diego, Calif., USA (Fotros); the Department of Biomedical Engineering, McGill University, Montreal, Que., Canada (Gravel, Reader); Ste-Justine Hospital Research Center, Université de Montréal, Montreal, Que., Canada (Casey); the Department of Neurology and Neurosurgery, McGill University, Montreal, Que., Canada (Larcher, Dagher, Benkelfat, Leyton); the Molecular Imaging Center, University of Antwerp, Antwerp, Belgium (Verhaeghe); the Division of Imaging Sciences and Biomedical Engineering, Department of Biomedical Engineering, King's College London, St. Thomas' Hospital, London, UK (Reader); and the Center for Studies in Behavioral Neurobiology, Concordia University, Montreal, Que., Canada (Leyton).

Description:

Cocaine cue-induced dopamine release in the human prefrontal cortex.

J Psychiatry Neurosci. 2016 08;41(5):322-30

Authors: Milella MS, Fotros A, Gravel P, Casey KF, Larcher K, Verhaeghe JA, Cox SM, Reader AJ, Dagher A, Benkelfat C, Leyton M

Abstract

BACKGROUND: Accumulating evidence indicates that drug-related cues can induce dopamine (DA) release in the striatum of substance abusers. Whether these same cues provoke DA release in the human prefrontal cortex remains unknown.

METHODS: We used high-resolution positron emission tomography with [18F]fallypride to measure cortical and striatal DA D2/3 receptor availability in the presence versus absence of drug-related cues in volunteers with current cocaine dependence.

RESULTS: Twelve individuals participated in our study. Among participants reporting a craving response (9 of 12), exposure to the cocaine cues significantly decreased [18F]fallypride binding potential (BPND) values in the medial orbitofrontal cortex and striatum. In all 12 participants, individual differences in the magnitude of craving correlated with BPND changes in the medial orbitofrontal cortex, dorsolateral prefrontal cortex, anterior cingulate, and striatum. Consistent with the presence of autoreceptors on mesostriatal but not mesocortical DA cell bodies, midbrain BPND values were significantly correlated with changes in BPND within the striatum but not the cortex. The lower the midbrain D2 receptor levels, the greater the striatal change in BPND and self-reported craving.

LIMITATIONS: Limitations of this study include its modest sample size, with only 2 female participants. Newer tracers might have greater sensitivity to cortical DA release.

CONCLUSION: In people with cocaine use disorders, the presentation of drug-related cues induces DA release within cortical and striatal regions. Both effects are associated with craving, but only the latter is regulated by midbrain autoreceptors. Together, the results suggest that cortical and subcortical DA responses might both influence drug-focused incentive motivational states, but with separate regulatory mechanisms.

PMID: 26900792 [PubMed - indexed for MEDLINE]