Cited by 48Memory and Neural MechanismsNeuroscience and Neuropharmacology ResearchNeurobiology and Insect Physiology Research

Dynamic Properties of Regulatory Motifs Associated with Induction of Three Temporal Domains of Memory in Aplysia

Pettigrew, David B., Smolen, Paul, Baxter, Douglas A., Byrne, John H.·2005·Journal of Computational Neuroscience

Abstract

A model was developed to examine dynamical properties of regulatory motifs correlated with different temporal domains of memory. The model represents short-, intermediate-, and long-term phases of protein kinase A (PKA) activation, which appear related to corresponding phases of facilitation of the Aplysia sensorimotor synapse. The model also represents phosphorylation of the transcription factor CREB1 by PKA and consequent induction of the immediate-early gene Aplysia ubiquitin hydrolase (Ap-uch), which is essential for long-term synaptic facilitation (LTF). Simulations suggest mechanisms responsible for differing profiles of synaptic facilitation following massed vs. spaced exposures to 5-HT, and suggest a novel regulatory motif (gated positive feedback) is important for LTF. Simulations suggest zero-order ultrasensitivity may underlie a requirement of a threshold number of exposures to 5-HT for LTF induction. The model makes predictions for the dynamics of PKA activation and Ap-uch induction when MAP kinase is activated, or when repression of Ap-uch is relieved by inhibiting the transcription factor CREB2. This model may therefore be useful for understanding processes underlying memory formation in Aplysia and other systems.

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Crossref · 10.1007/s10827-005-6557-0

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  • Positive feedback loops that maintain key kinases and other molecules in persistently active states at strengthened synapses may also contribute to long-term memory storage.

    “Positive feedback loops that maintain key kinases and other molecules in persistently active states at strengthened synapses may also contribute to such long-term memory storage75–79.”

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Authors
Pettigrew, D. B., Smolen, P., Baxter, D. A., & Byrne, J. H.
Affiliations
The University of Texas Health Science Center at Houston (US)
Corresponding author
Byrne, John H.
Venue
Journal of Computational Neuroscience
Published
2005-03
Volume
18
Issue
2
Pages
163-181
ISSN
  • 0929-5313 (ISSN-L)
  • 1573-6873
OpenAlex
W2057551293
Cited by
48
References
87
Citations by year
2024: 1 · 2022: 5 · 2021: 4 · 2020: 7 · 2019: 1 · 2017: 1 · 2016: 4 · 2015: 3 · 2014: 2 · 2013: 3
FWCI
1.32
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Computational Neuroscience (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (1r01ns050532-01, 5p01ns038310-10)
  • National Institute of Neurological Disorders and Stroke (P01NS-38310, R01 NS050532)
  • U.S. National Library of Medicine (5T15-LM-07093, T15LM007093)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurobiology and Insect Physiology Research
Keywords
Aplysia, long-term memory, protein kinase A, CREB1, ATF4, ubiquitin hydrolase, synaptic facilitation, serotonin, ultrasensitivity, mitogen-activated protein kinase, transcriptional regulation, computational model of memory
MeSH terms
Animals, Aplysia, Drug Administration Schedule, Enzyme Activation, Feedback, Memory, Models, Biological, Nerve Tissue Proteins, Phosphorylation, Repressor Proteins, Serotonin, Synapses, Time Factors, Transcription Factors, Cyclic AMP Response Element-Binding Protein, Nonlinear Dynamics, Long-Term Potentiation, Cyclic AMP-Dependent Protein Kinases, Amino Acid Motifs, Ubiquitin Thiolesterase, Extracellular Signal-Regulated MAP Kinases

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