Regulation of the phosphodiesterase PDE4B3-isotype during long-term potentiation in the area dentata in vivo

T. Ahmed, S. Frey, J. U. Frey

Research output: Contribution to journalArticle

16 Scopus citations

Abstract

Hippocampal long-term potentiation (LTP) is the most prominent cellular model underlying learning and memory formation. However, which cellular processes are involved in maintaining LTP remains largely unknown. We have previously detailed temporal modulations of cyclic adenosine monophosphate (cAMP) and a cAMP-specific phosphodiesterase, PDE4B3, after LTP-induction and its maintenance in hippocampal area CA1 in vitro. To test whether other hippocampal sub-structures are characterised by similar mechanisms, tissue from the area dentata of freely moving rats was analysed at different LTP-time points. The tissue was fractionated into three components, where PDE4B-levels and cAMP-concentrations were measured. In contrast with data obtained in area CA1 [Neuroscience 117 (2003) 627], we now detail an LTP-specific translational, but not transcriptional regulation of PDE4B3 within the first 8 h after tetanization and present spatio-temporal changes of PDE4B proteins and cAMP that is LTP-specific.

Original languageEnglish (US)
Pages (from-to)857-867
Number of pages11
JournalNeuroscience
Volume124
Issue number4
DOIs
StatePublished - Mar 22 2004

Keywords

  • 3-isobutyl-1-methyl-2, 6(1H,3H)-purinedione
  • Area dentata
  • CREB
  • DG
  • Dentate gyrus
  • GFAP
  • Glial fibrillary acidic protein
  • Hippocampus
  • IBMX
  • LFS
  • Learning
  • Long-term potentiation
  • Memory formation
  • Phosphodiesterase PDE4B3
  • cAMP response element binding protein

ASJC Scopus subject areas

  • Neuroscience(all)

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