A common mechanism mediates long-term changes in synaptic transmission after chronic cocaine and morphine

Antonello Bonci, John Williams

Research output: Contribution to journalArticle

179 Citations (Scopus)

Abstract

The mesolimbic system is known to play a role in self-administration of opioids and psychostimulants. Although morphine and cocaine act by separate cellular mechanisms initially, the present study describes a common change in synaptic regulation of dopamine cells in the ventral tegmental area 1 week after termination of chronic treatment with either drug. Normally, D1 receptor activation augmented the amplitude of a γ-aminobutyric acid type B (GABA(B)) inhibitory postsynaptic potential (IPSP), but in drug-experienced animals, D1 receptor activation caused an inhibition of the GABA(B) IPSP. The inhibition was blocked by adenosine A1 receptor antagonists and by agents that disrupted the metabolism of cAMP. This long-lasting dopamine-adenosine interaction may be one mechanism involved in dopamine-mediated craving and relapse to drug-seeking behaviors.

Original languageEnglish (US)
Pages (from-to)631-639
Number of pages9
JournalNeuron
Volume16
Issue number3
DOIs
StatePublished - Mar 1996

Fingerprint

Cocaine
Synaptic Transmission
Morphine
Dopamine
Inhibitory Postsynaptic Potentials
gamma-Aminobutyric Acid
Adenosine A1 Receptor Antagonists
Drug-Seeking Behavior
Aminobutyrates
Ventral Tegmental Area
Self Administration
Pharmaceutical Preparations
Adenosine
Opioid Analgesics
Recurrence
Inhibition (Psychology)
Therapeutics

ASJC Scopus subject areas

  • Neuroscience(all)

Cite this

A common mechanism mediates long-term changes in synaptic transmission after chronic cocaine and morphine. / Bonci, Antonello; Williams, John.

In: Neuron, Vol. 16, No. 3, 03.1996, p. 631-639.

Research output: Contribution to journalArticle

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