PKC Differentially Translocates during Spaced and Massed Training in Aplysia
Open accessAbstract
Learning is highly regulated by the pattern of training. In Aplysia, an important organism for the development of cellular and molecular models of learning, spaced versus massed application of the same stimulus leads to different forms of memory. A critical molecular step underlying memory is the serotonin (5HT)-mediated activation of the novel PKC Apl II. Here, we demonstrate that activation of PKC Apl II is highly sensitive to the pattern of 5HT application. Spaced applications downregulate PKC translocation through PKA signaling, whereas massed applications lead to persistent translocation of PKC. Differential regulation of PKC translocation is mediated by competing feedback mechanisms that act through protein synthesis. These studies elucidate a fundamental molecular difference between spaced and massed training protocols.
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In Aplysia californica sensory neuron-motor neuron co-cultures, PKC is activated to a greater extent during a massed stimulus of continuous 5-HT than during a spaced stimulus with 15-minute intervals.
“A study involving A. californica sensory neuron–motor neuron co-cultures62 found that protein kinase C (PKC) is activated to a greater extent during a massed stimulus (continuous 5-HT application) than during a spaced stimulus (15-minute intervals between applications).”
From The right time to learn: Mechanisms and optimization of spaced learning (2016) · cites this paper as [62]
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- Authors
- Farah, C. A., Weatherill, D., Dunn, T. W., & Sossin, W. S.
- Affiliations
- Montreal Neurological Institute and Hospital (CA)
- Corresponding author
- Sossin, Wayne S.
- Venue
- The Journal of Neuroscience
- Publisher
- Society for Neuroscience
- Published
- 2009-08-19
- Volume
- 29
- Issue
- 33
- Pages
- 10281-10286
- ISSN
- 0270-6474 (ISSN-L)
- 1529-2401
- PMC
- PMC3006447
- OpenAlex
- W2050970191
- Cited by
- 38
- References
- 38
- Citations by year
- 2024: 3 · 2021: 2 · 2020: 1 · 2019: 1 · 2017: 2 · 2016: 3 · 2015: 3 · 2014: 2 · 2013: 4 · 2012: 6
- FWCI
- 2.74
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Cooley's Anemia Foundation
- McGill University
- Canadian Institutes of Health Research (12046, MOP12046)
- 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
- protein kinase C, PKC translocation, spaced training, massed training, Aplysia, serotonin, PKA signaling, memory consolidation, feedback regulation, protein synthesis
- MeSH terms
- Animals, Aplysia, Cells, Cultured, Learning, Memory, Protein Kinase C, Sensory Receptor Cells, Serotonin, Protein Biosynthesis, Protein Kinase Inhibitors
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