Cited by 117Neuroscience and Neuropharmacology ResearchVisual perception and processing mechanismsNeurogenesis and neuroplasticity mechanisms

Comparison of Plasticity In Vivo and In Vitro in the Developing Visual Cortex of Normal and Protein Kinase A RIβ-Deficient Mice

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Hensch, Takao K., Gordon, Joshua A., Brandon, Eugene P., McKnight, G. Stanley, Idzerda, Rejean L., Stryker, Michael P.·1998·The Journal of Neuroscience

Abstract

Developing sensory systems are sculpted by an activity-dependent strengthening and weakening of connections. Long-term potentiation (LTP) and depression (LTD)in vitro have been proposed to model this experience-dependent circuit refinement. We directly compared LTP and LTD induction in vitro with plasticity in vivo in the developing visual cortex of a mouse mutant of protein kinase A (PKA), a key enzyme implicated in the plasticity of a diverse array of systems. In mice lacking the RIβ regulatory subunit of PKA, we observed three abnormalities of synaptic plasticity in layer II/III of visual cortex in vitro. These included an absence of (1) extracellularly recorded LTP, (2) depotentiation or LTD, and (3) paired-pulse facilitation. Potentiation was induced, however, by pairing low-frequency stimulation with direct depolarization of individual mutant pyramidal cells. Together these findings suggest that the LTP defect in slices lacking PKA RIβ lies in the transmission of sufficient net excitation through the cortical circuit. Nonetheless, functional development and plasticity of visual cortical responses in vivo after monocular deprivation did not differ from normal. Moreover, the loss of all responsiveness to stimulation of the originally deprived eye in most cortical cells could be restored by reverse suture of eyelids during the critical period in both wild-type and mutant mice. Such an activity-dependent increase in response would seem to require a mechanism like potentiation in vivo. Thus, the RIβ isoform of PKA is not essential for ocular dominance plasticity, which can proceed despite defects in several common in vitro models of neural plasticity.

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Crossref · 10.1523/jneurosci.18-06-02108.1998

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Authors
Hensch, T. K., Gordon, J. A., Brandon, E. P., McKnight, G. S., Idzerda, R. L., & Stryker, M. P.
Affiliations
  • University of California, San Francisco (US)
  • University of Washington (US)
Venue
The Journal of Neuroscience
Published
1998-03-15
Volume
18
Issue
6
Pages
2108-2117
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2171569315
Cited by
117
References
98
Citations by year
2026: 1 · 2025: 1 · 2024: 1 · 2023: 1 · 2021: 1 · 2020: 2 · 2018: 1 · 2017: 3 · 2016: 2 · 2015: 1 · 2014: 2 · 2013: 2 · 2012: 3
FWCI
3.83
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (EY02874)
  • National Eye Institute (R01EY002874, EY-02874, R37EY002874)
  • National Institute of General Medical Sciences (GM32875, R01GM032875)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Visual perception and processing mechanisms
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
Keywords
visual cortex development, synaptic plasticity, long-term potentiation, long-term depression, depotentiation, paired-pulse facilitation, monocular deprivation, ocular dominance, critical period, pyramidal neurons, layer 2/3
MeSH terms
Action Potentials, Aging, Animals, Extracellular Space, Functional Laterality, Neuronal Plasticity, Ocular Physiological Phenomena, Reference Values, Sensory Deprivation, Synapses, Visual Cortex, Vision, Monocular, Long-Term Potentiation, Cyclic AMP-Dependent Protein Kinases, Patch-Clamp Techniques, Mice, Cyclic AMP-Dependent Protein Kinase RIbeta Subunit

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