Cited by 58Visual perception and processing mechanismsNeurogenesis and neuroplasticity mechanismsNeuroscience and Neuropharmacology Research

Inhibition of matrix metalloproteinases prevents the potentiation of nondeprived-eye responses after monocular deprivation in juvenile rats

Spolidoro, M., Putignano, E., Munafò, C., Maffei, L., Pizzorusso, T.·2012·Cerebral Cortex

Abstract

The ocular dominance (OD) shift induced by monocular deprivation (MD) during the critical period is mediated by an initial depression of deprived-eye responses followed by an increased responsiveness to the nondeprived eye. It is not fully clear to what extent these 2 events are correlated and which are their physiological and molecular mediators. The extracellular synaptic environment plays an important role in regulating visual cortical plasticity. Matrix metalloproteinases (MMPs) are a family of activity-dependent zinc-dependent extracellular endopeptidases mediating extracellular matrix remodeling. We investigated the effects of MMP inhibition on OD plasticity in juvenile monocularly deprived rats. By using electrophysiological recordings, we found that MMP inhibition selectively prevented the potentiation of neuronal responses to nondeprived-eye stimulation occurring after 7 days of MD and potentiation of deprived-eye responses occurring after eye reopening. Three days of MD only resulted in a depression of deprived-eye responses insensitive to MMP inhibition. MMP inhibition did not influence homeostatic plasticity tested in the monocular cortex but significantly prevented an increase in dendritic spine density present after 7 days MD in layer II-III pyramids.

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Crossref · 10.1093/cercor/bhr158

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Authors
Spolidoro, M., Putignano, E., Munafò, C., Maffei, L., & Pizzorusso, T.
Affiliations
  • Neuroscience Institute (IT)
  • Scuola Normale Superiore (IT)
Venue
Cerebral Cortex
Published
2011-06-17
Volume
22
Issue
3
Pages
725-734
ISSN
  • 1047-3211 (ISSN-L)
  • 1460-2199
OpenAlex
W2132531370
Cited by
58
References
65
Citations by year
2026: 2 · 2025: 1 · 2024: 9 · 2023: 2 · 2022: 1 · 2021: 6 · 2020: 2 · 2019: 4 · 2018: 1 · 2017: 4 · 2016: 3 · 2015: 8 · 2014: 8 · 2013: 1 · 2012: 2
FWCI
2.43
Type
journal article
Language
en
Open access
closed
Locations
  • Cerebral Cortex (publishedVersion)
  • PubMed (publishedVersion)
  • Florence Research (University of Florence) (submittedVersion)
  • Scuola Normale Superiore di Pisa (submittedVersion)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Visual perception and processing mechanisms
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
matrix metalloproteinases, monocular deprivation, ocular dominance, critical period, visual cortical plasticity, dendritic spine density, extracellular matrix remodeling, homeostatic plasticity, young rats
MeSH terms
Animals, Dipeptides, Enzyme Inhibitors, Evoked Potentials, Visual, Neural Inhibition, Neuronal Plasticity, Photic Stimulation, Visual Cortex, Rats, Long-Evans, Amaurosis Fugax, Matrix Metalloproteinases, Rats, Matrix Metalloproteinase Inhibitors

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