Cited by 35Neuroscience and Neuropharmacology ResearchNeurogenesis and neuroplasticity mechanismsProtease and Inhibitor Mechanisms

Matrix metalloproteinase-9 regulates neuronal circuit development and excitability

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Murase, Sachiko, Lantz, Crystal L., Kim, Eunyoung, Gupta, Nitin, Higgins, Richard, Stopfer, Mark, Hoffman, Dax A., Quinlan, Elizabeth M.·2016·Molecular Neurobiology

Abstract

In early postnatal development, naturally occurring cell death, dendritic outgrowth, and synaptogenesis sculpt neuronal ensembles into functional neuronal circuits. Here, we demonstrate that deletion of the extracellular proteinase matrix metalloproteinase-9 (MMP-9) affects each of these processes, resulting in maladapted neuronal circuitry. MMP-9 deletion increases the number of CA1 pyramidal neurons but decreases dendritic length and complexity. Parallel changes in neuronal morphology are observed in primary visual cortex and persist into adulthood. Individual CA1 neurons in MMP-9(-/-) mice have enhanced input resistance and a significant increase in the frequency, but not amplitude, of miniature excitatory postsynaptic currents (mEPSCs). Additionally, deletion of MMP-9 significantly increases spontaneous neuronal activity in awake MMP-9(-/-) mice and enhances response to acute challenge by the excitotoxin kainate. Our data document a novel role for MMP-9-dependent proteolysis: the regulation of several aspects of circuit maturation to constrain excitability throughout life.

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Authors
Murase, S., Lantz, C. L., Kim, E., Gupta, N., Higgins, R., Stopfer, M., Hoffman, D. A., & Quinlan, E. M.
Affiliations
  • National Institutes of Health (US)
  • University of Maryland, College Park (US)
Corresponding author
Murase, Sachiko
Venue
Molecular Neurobiology
Published
2015-06-21
Volume
53
Issue
5
Pages
3477-3493
ISSN
  • 0893-7648 (ISSN-L)
  • 1559-1182
OpenAlex
W2196613855
Cited by
35
References
79
Citations by year
2025: 1 · 2024: 2 · 2023: 3 · 2022: 4 · 2021: 3 · 2020: 7 · 2019: 5 · 2018: 3 · 2017: 3 · 2016: 3 · 2015: 1
FWCI
1.55
Type
journal article
Language
en
Open access
Locations
  • Molecular Neurobiology (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health
  • National Eye Institute (R01EY025922, R01EY016431)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Protease and Inhibitor Mechanisms
Keywords
MMP-9, neural circuit development, neuronal excitability, dendritic outgrowth, synaptogenesis, CA1 pyramidal neurons, primary visual cortex, input resistance, miniature excitatory postsynaptic currents, spontaneous neuronal activity, kainate excitotoxicity, proteolysis, postnatal brain development, dendritic morphology
MeSH terms
Animals, Animals, Newborn, Female, Hippocampus, Kainic Acid, Male, Mice, Inbred C57BL, Nerve Net, Synaptic Transmission, Neurons, Seizures, Synapses, Biomarkers, Proto-Oncogene Proteins c-fos, Cell Death, Pyramidal Cells, Matrix Metalloproteinase 9, Dendritic Spines

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