Atypical dopamine transporter inhibitors attenuate compulsive-like methamphetamine self-administration in rats

Brendan J. Tunstall, Chelsea P. Ho, Jianjing Cao, Janaína C.M. Vendruscolo, Brooke E. Schmeichel, Rachel D. Slack, Gianluigi Tanda, Alexandra J. Gadiano, Rana Rais, Barbara S. Slusher, George F. Koob, Amy H. Newman, Leandro F. Vendruscolo

Research output: Contribution to journalArticlepeer-review

Abstract

Methamphetamine (METH) is a highly addictive drug, but no pharmacological treatment is yet available for METH use disorders. Similar to METH, the wake-promoting drug (R)-modafinil (R-MOD) binds to the dopamine transporter (DAT). Unlike METH, R-MOD is not a substrate for transport by DAT and has low abuse potential. We tested the hypothesis that the atypical DAT inhibitor R-MOD and compounds that are derived from modafinil would decrease METH intake by reducing the actions of METH at the DAT. We tested the effects of systemic injections of R-MOD and four novel modafinil-derived ligands with increased DAT affinity (JJC8-016, JJC8-088, JJC8-089, and JJC8-091) on intravenous (i.v.) METH self-administration in rats that were allowed short access (ShA; 1 h) or long access (LgA; 6 h) to the drug. ShA rats exhibited stable METH intake over sessions, whereas LgA rats exhibited an escalation of drug intake. R-MOD decreased METH self-administration in ShA and LgA rats (in the 1st hour only). JJC8-091 and JJC8-016 decreased METH self-administration in both ShA and LgA rats. JJC8-089 decreased METH self-administration in LgA rats only, whereas JJC8-088 had no effect on METH self-administration in either ShA or LgA rats. These findings support the potential of atypical DAT inhibitors for the treatment of METH use disorders and suggest several novel compounds as candidate drugs.

Original languageEnglish (US)
Pages (from-to)96-103
Number of pages8
JournalNeuropharmacology
Volume131
DOIs
StatePublished - Mar 15 2018

Keywords

  • Addiction
  • Dopamine transporter (DAT)
  • Drug dependence
  • Methamphetamine
  • Operant intravenous self-administration

ASJC Scopus subject areas

  • Pharmacology
  • Cellular and Molecular Neuroscience

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