A slow-onset, long-duration indanamine monoamine reuptake inhibitor as a potential maintenance pharmacotherapy for psychostimulant abuse: Effects in laboratory rat models relating to addiction

Eliot L. Gardner, Xinhe Liu, William Paredes, Anthony Giordano, Jordan Spector, Marino Lepore, Kuo Ming Wu, Mark Froimowitz

Research output: Contribution to journalArticle

13 Scopus citations

Abstract

Slow-onset, long-lasting dopamine reuptake blockers with reduced abuse potential have been suggested as maintenance therapies for cocaine addiction. We have synthesized a series of 3-(3′,4′-dichlorophenyl)-1-indanamine monoamine reuptake inhibitors as candidates for such maintenance pharmacotherapy. The initial lead compound, the N,N-dimethyl analogue 30,640 was then subjected to testing in addiction-relevant animal models. Compound 30,640 (2 mg/kg i.p.) produced a pronounced slow-onset, long-lasting increase (300-400%) in extracellular nucleus accumbens dopamine levels, as measured by in vivo brain microdialysis in awake laboratory rats. Slow-onset, long-lasting decreases (40-80%) in the dopamine metabolites 3,4-dihydroxyphenylacetic acid and homovanillic acid, and the serotonin metabolite 5-hydroxyindoleacetic acid were also seen. Compound 30,640 (3 or 5 mg/kg i.p.) also produced a significant (∼30%) slow-onset, long-lasting enhancement of electrical brain-stimulation reward, which was additive with that of cocaine (5 mg/kg i.p.). When given to cocaine-administering rats, 30,640 (2.5, 3, 5, or 10 mg/kg i.p.) significantly inhibited (30-60%) intravenous cocaine self-administration, with a pronounced long-lasting profile. In sum, 30,640 showed cocaine-like effects, but with a marked slow-onset, long-lasting profile. We conclude that the prodrug strategy employed in the design of 30,640 achieved its goal. We suggest that such compounds may be useful as maintenance pharmacotherapies for psychostimulant addiction.

Original languageEnglish (US)
Pages (from-to)993-1003
Number of pages11
JournalNeuropharmacology
Volume51
Issue number5
DOIs
StatePublished - Oct 1 2006

Keywords

  • Addiction
  • Cocaine
  • Drug abuse
  • Indanamine
  • Reuptake blockade

ASJC Scopus subject areas

  • Pharmacology
  • Cellular and Molecular Neuroscience

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