Role of serotonin in the paradoxical calming effect of psychostimulants on hyperactivity.

Journal Article

The mechanism by which psychostimulants act as calming agents in humans with attention-deficit hyperactivity disorder (ADHD) or hyperkinetic disorder is currently unknown. Mice lacking the gene encoding the plasma membrane dopamine transporter (DAT) have elevated dopaminergic tone and are hyperactive. This activity was exacerbated by exposure to a novel environment. Additionally, these mice were impaired in spatial cognitive function, and they showed a decrease in locomotion in response to psychostimulants. This paradoxical calming effect of psychostimulants depended on serotonergic neurotransmission. The parallels between the DAT knockout mice and individuals with ADHD suggest that common mechanisms may underlie some of their behaviors and responses to psychostimulants.

Full Text

Duke Authors

Cited Authors

  • Gainetdinov, RR; Wetsel, WC; Jones, SR; Levin, ED; Jaber, M; Caron, MG

Published Date

  • January 15, 1999

Published In

Volume / Issue

  • 283 / 5400

Start / End Page

  • 397 - 401

PubMed ID

  • 9888856

International Standard Serial Number (ISSN)

  • 0036-8075

Language

  • eng

Conference Location

  • United States