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Nat Neurosci. 2004 Jun;7(6):583-4. Epub 2004 May 16.

Nicotine amplifies reward-related dopamine signals in striatum.

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  • 1University Department of Pharmacology, Mansfield Road, Oxford OX1 3QT, UK.

Abstract

Reward-seeking behaviors depend critically on dopamine signaling--dopamine neurons encode reward-related information by switching from tonic to phasic (burst-like) activity. Using guinea pig brain slices, we show that nicotine, like cocaine and amphetamine, acts directly in striatum where it enhances dopamine release during phasic but not tonic activity. This amplification provides a mechanism for nicotine facilitation of reward-related dopamine signals, including responses to other primary reinforcers that govern nicotine dependence in smokers.

PMID:
15146188
[PubMed - indexed for MEDLINE]
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