Plasticity-specific phosphorylation of CaMKII, MAP-kinases and CREB during late-LTP in rat hippocampal slices in vitro

Tariq Ahmed, Julietta Uta Frey

Research output: Contribution to journalArticle

87 Citations (Scopus)

Abstract

Processes of learning, memory formation and functional plasticity, such as long-term potentiation (LTP) are associated with activity changes of αCaMKII, MAPKs and CREB proteins. Little is known on the temporal regulation of the phosphorylation states of these proteins during late-LTP, a period which requires the synthesis of new macromolecules and has been postulated to correlate with the consolidation of a memory trace at the cellular level. We now present data from hippocampal slices in vitro obtained from adult rats that describe such specific phosphorylation changes of the above mentioned three molecules during early- and late-LTP. We detail that LTP induction and its maintenance reveals a delayed onset of continuous CREB phosphorylation with two separate peaks at 45 min and 6 h before it decays back to baseline phosphorylation levels; whereas αCaMKII and MAPK2 remain in a specific, but enhanced phosphorylation state throughout the induction, early- and late-LTP. These LTP-regulated phopshorylation events were NMDAR-dependent and upon the activity of a translated serine-threonine kinase. Interestingly, only the late enhancement of pCREB was clearly dependent on protein synthesis. Our data extend results describing the regulation of αCaMKII, MAPKs and CREB phosphorylation during early stages of LTP, suggesting a specific role of these enzymes also during phases of LTP consolidation in adult animals.

Original languageEnglish (US)
Pages (from-to)477-492
Number of pages16
JournalNeuropharmacology
Volume49
Issue number4
DOIs
StatePublished - Sep 1 2005

Fingerprint

Calcium-Calmodulin-Dependent Protein Kinase Type 2
Long-Term Potentiation
Phosphotransferases
Phosphorylation
Cyclic AMP Response Element-Binding Protein
In Vitro Techniques
Protein-Serine-Threonine Kinases
Proteins
Maintenance
Learning
Enzymes

Keywords

  • Bimodal protein phosphorylation
  • Hippocampal slice in vitro
  • Long-term potentiation
  • NMDAR-mediated translation
  • Plasticity-specific phosphorylation
  • Serine/threonine kinase

ASJC Scopus subject areas

  • Cellular and Molecular Neuroscience
  • Drug Discovery
  • Pharmacology

Cite this

Plasticity-specific phosphorylation of CaMKII, MAP-kinases and CREB during late-LTP in rat hippocampal slices in vitro. / Ahmed, Tariq; Frey, Julietta Uta.

In: Neuropharmacology, Vol. 49, No. 4, 01.09.2005, p. 477-492.

Research output: Contribution to journalArticle

@article{8bf9b98c3a4548e0aeaf692e48fabf71,
title = "Plasticity-specific phosphorylation of CaMKII, MAP-kinases and CREB during late-LTP in rat hippocampal slices in vitro",
abstract = "Processes of learning, memory formation and functional plasticity, such as long-term potentiation (LTP) are associated with activity changes of αCaMKII, MAPKs and CREB proteins. Little is known on the temporal regulation of the phosphorylation states of these proteins during late-LTP, a period which requires the synthesis of new macromolecules and has been postulated to correlate with the consolidation of a memory trace at the cellular level. We now present data from hippocampal slices in vitro obtained from adult rats that describe such specific phosphorylation changes of the above mentioned three molecules during early- and late-LTP. We detail that LTP induction and its maintenance reveals a delayed onset of continuous CREB phosphorylation with two separate peaks at 45 min and 6 h before it decays back to baseline phosphorylation levels; whereas αCaMKII and MAPK2 remain in a specific, but enhanced phosphorylation state throughout the induction, early- and late-LTP. These LTP-regulated phopshorylation events were NMDAR-dependent and upon the activity of a translated serine-threonine kinase. Interestingly, only the late enhancement of pCREB was clearly dependent on protein synthesis. Our data extend results describing the regulation of αCaMKII, MAPKs and CREB phosphorylation during early stages of LTP, suggesting a specific role of these enzymes also during phases of LTP consolidation in adult animals.",
keywords = "Bimodal protein phosphorylation, Hippocampal slice in vitro, Long-term potentiation, NMDAR-mediated translation, Plasticity-specific phosphorylation, Serine/threonine kinase",
author = "Tariq Ahmed and Frey, {Julietta Uta}",
year = "2005",
month = "9",
day = "1",
doi = "10.1016/j.neuropharm.2005.04.018",
language = "English (US)",
volume = "49",
pages = "477--492",
journal = "Neuropharmacology",
issn = "0028-3908",
publisher = "Elsevier Limited",
number = "4",

}

TY - JOUR

T1 - Plasticity-specific phosphorylation of CaMKII, MAP-kinases and CREB during late-LTP in rat hippocampal slices in vitro

AU - Ahmed, Tariq

AU - Frey, Julietta Uta

PY - 2005/9/1

Y1 - 2005/9/1

N2 - Processes of learning, memory formation and functional plasticity, such as long-term potentiation (LTP) are associated with activity changes of αCaMKII, MAPKs and CREB proteins. Little is known on the temporal regulation of the phosphorylation states of these proteins during late-LTP, a period which requires the synthesis of new macromolecules and has been postulated to correlate with the consolidation of a memory trace at the cellular level. We now present data from hippocampal slices in vitro obtained from adult rats that describe such specific phosphorylation changes of the above mentioned three molecules during early- and late-LTP. We detail that LTP induction and its maintenance reveals a delayed onset of continuous CREB phosphorylation with two separate peaks at 45 min and 6 h before it decays back to baseline phosphorylation levels; whereas αCaMKII and MAPK2 remain in a specific, but enhanced phosphorylation state throughout the induction, early- and late-LTP. These LTP-regulated phopshorylation events were NMDAR-dependent and upon the activity of a translated serine-threonine kinase. Interestingly, only the late enhancement of pCREB was clearly dependent on protein synthesis. Our data extend results describing the regulation of αCaMKII, MAPKs and CREB phosphorylation during early stages of LTP, suggesting a specific role of these enzymes also during phases of LTP consolidation in adult animals.

AB - Processes of learning, memory formation and functional plasticity, such as long-term potentiation (LTP) are associated with activity changes of αCaMKII, MAPKs and CREB proteins. Little is known on the temporal regulation of the phosphorylation states of these proteins during late-LTP, a period which requires the synthesis of new macromolecules and has been postulated to correlate with the consolidation of a memory trace at the cellular level. We now present data from hippocampal slices in vitro obtained from adult rats that describe such specific phosphorylation changes of the above mentioned three molecules during early- and late-LTP. We detail that LTP induction and its maintenance reveals a delayed onset of continuous CREB phosphorylation with two separate peaks at 45 min and 6 h before it decays back to baseline phosphorylation levels; whereas αCaMKII and MAPK2 remain in a specific, but enhanced phosphorylation state throughout the induction, early- and late-LTP. These LTP-regulated phopshorylation events were NMDAR-dependent and upon the activity of a translated serine-threonine kinase. Interestingly, only the late enhancement of pCREB was clearly dependent on protein synthesis. Our data extend results describing the regulation of αCaMKII, MAPKs and CREB phosphorylation during early stages of LTP, suggesting a specific role of these enzymes also during phases of LTP consolidation in adult animals.

KW - Bimodal protein phosphorylation

KW - Hippocampal slice in vitro

KW - Long-term potentiation

KW - NMDAR-mediated translation

KW - Plasticity-specific phosphorylation

KW - Serine/threonine kinase

UR - http://www.scopus.com/inward/record.url?scp=23844454133&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=23844454133&partnerID=8YFLogxK

U2 - 10.1016/j.neuropharm.2005.04.018

DO - 10.1016/j.neuropharm.2005.04.018

M3 - Article

VL - 49

SP - 477

EP - 492

JO - Neuropharmacology

JF - Neuropharmacology

SN - 0028-3908

IS - 4

ER -