Central galanin administration blocks consolidation of spatial learning

Jefferson W. Kinney, Grzegorz Starosta, Jacqueline Crawley

Research output: Contribution to journalArticle

30 Scopus citations

Abstract

Galanin is a neuropeptide that inhibits the evoked release of several neurotransmitters, inhibits the activation of intracellular second messengers, and produces deficits in a variety of rodent learning and memory tasks. To evaluate the actions of galanin on encoding, consolidation, and storage/retrieval, galanin was acutely administered to Sprague-Dawley rats at time points before and after training trials in the Morris water maze. Intraventricular administration of galanin up to 3h after subjects had completed daily training trials in the Morris water task impaired performance on the probe trial, indicating that galanin-blocked consolidation. Pretreatment with an adenylate cyclase activator, forskolin, prevented the deficits in distal cue learning produced by galanin. Di-deoxyforskolin, an inactive analog of forskolin, had no effect. These results provide the first evidence that galanin interferes with long-term memory consolidation processes. A potential mechanism by which galanin produces this impairment may involve the inhibition of adenylate cyclase activity, leading to inhibition of downstream molecular events that are necessary for consolidation of long-term memory.

Original languageEnglish (US)
Pages (from-to)42-54
Number of pages13
JournalNeurobiology of Learning and Memory
Volume80
Issue number1
DOIs
StatePublished - Jul 2003
Externally publishedYes

Keywords

  • Adenylate cyclase
  • Alzheimer's disease
  • Consolidation
  • Forskolin
  • Galanin
  • Long-term memory

ASJC Scopus subject areas

  • Behavioral Neuroscience
  • Cognitive Neuroscience
  • Experimental and Cognitive Psychology

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