Transcranial magnetic stimulation of dorsolateral prefrontal cortex reduces cocaine use: A pilot study

Alberto Terraneo, Lorenzo Leggio, Marina Saladini, Mario Ermani, Antonello Bonci, Luigi Gallimberti

Research output: Contribution to journalArticlepeer-review

Abstract

Recent animal studies demonstrate that compulsive cocaine seeking strongly reduces prelimbic frontal cortex activity, while optogenetic stimulation of this brain area significantly inhibits compulsive cocaine seeking, providing a strong rationale for applying brain stimulation to reduce cocaine consumption. Thus, we employed repetitive transcranial magnetic stimulation (rTMS), to test if dorsolateral prefrontal cortex (DLPFC) stimulation might prevent cocaine use in humans. Thirty-two cocaine-addicted patients were randomly assigned to either the experimental group (rTMS) on the left DLPFC, or to a control group (pharmacological agents) during a 29-day study (Stage 1). This was followed by a 63-day follow-up (Stage 2), during which all participants were offered rTMS treatment. Amongst the patients who completed Stage 1, 16 were in the rTMS group (100%) and 13 in the control group (81%). No significant adverse events were noted. During Stage 1, there were a significantly higher number of cocaine-free urine drug tests in the rTMS group compared to control (p=0.004). Craving for cocaine was also significantly lower in the rTMS group compared to the controls (p=0.038). Out of 13 patients who completed Stage 1 in the control group, 10 patients received rTMS treatment during Stage 2 and showed significant improvement with favorable outcomes becoming comparable to those of the rTMS group. The present preliminary findings support the safety of rTMS in cocaine-addicted patients, and suggest its potential therapeutic role for rTMS-driven PFC stimulation in reducing cocaine use, providing a strong rationale for developing larger placebo-controlled studies.Trial name: Repetitive transcranial magnetic stimulation (rTMS) in cocaine abusers, URL:〈. http://www.isrctn.com/ISRCTN15823943?q=&filters=&sort=&offset=8&totalResults=13530&page=1&pageSize=10&searchType=basic-search〉, Registration number: ISRCTN15823943.

Original languageEnglish
Pages (from-to)37-44
Number of pages8
JournalEuropean Neuropsychopharmacology
Volume26
Issue number1
DOIs
Publication statusPublished - Jan 1 2016

Keywords

  • Addiction
  • Cocaine use disorder
  • Craving
  • Optogenetics
  • Prefrontal cortex
  • Repeated transcranial magnetic stimulation

ASJC Scopus subject areas

  • Clinical Neurology
  • Psychiatry and Mental health
  • Pharmacology (medical)
  • Biological Psychiatry
  • Neurology
  • Pharmacology

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