Cited by 99Neurogenesis and neuroplasticity mechanismsGenetics and Neurodevelopmental DisordersFetal and Pediatric Neurological Disorders

Disrupted ERK Signaling during Cortical Development Leads to Abnormal Progenitor Proliferation, Neuronal and Network Excitability and Behavior, Modeling Human Neuro-Cardio-Facial-Cutaneous and Related Syndromes

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Pucilowska, J., Puzerey, P. A., Karlo, J. C., Galan, R. F., Landreth, G. E.·2012·Journal of Neuroscience

Abstract

Genetic disorders arising from copy number variations in the ERK (extracellular signal-regulated kinase) MAP (mitogen-activated protein) kinases or mutations in their upstream regulators that result in neuro-cardio-facial-cutaneous syndromes are associated with developmental abnormalities, cognitive deficits, and autism. We developed murine models of these disorders by deleting the ERKs at the beginning of neurogenesis and report disrupted cortical progenitor generation and proliferation, which leads to altered cytoarchitecture of the postnatal brain in a gene-dose-dependent manner. We show that these changes are due to ERK-dependent dysregulation of cyclin D1 and p27(Kip1), resulting in cell cycle elongation, favoring neurogenic over self-renewing divisions. The precocious neurogenesis causes premature progenitor pool depletion, altering the number and distribution of pyramidal neurons. Importantly, loss of ERK2 alters the intrinsic excitability of cortical neurons and contributes to perturbations in global network activity. These changes are associated with elevated anxiety and impaired working and hippocampal-dependent memory in these mice. This study provides a novel mechanistic insight into the basis of cortical malformation which may provide a potential link to cognitive deficits in individuals with altered ERK activity.

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Authors
Pucilowska, J., Puzerey, P. A., Karlo, J. C., Galan, R. F., & Landreth, G. E.
Affiliations
Case Western Reserve University (US)
Venue
Journal of Neuroscience
Published
2012-06-20
Volume
32
Issue
25
Pages
8663-8677
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2165890492
Cited by
99
References
59
Citations by year
2026: 3 · 2025: 6 · 2024: 5 · 2023: 6 · 2022: 8 · 2021: 8 · 2020: 3 · 2019: 7 · 2018: 8 · 2017: 10 · 2016: 4 · 2015: 12 · 2014: 11 · 2013: 6 · 2012: 2
FWCI
3.34
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
Mt. Sinai Health Care Foundation
Topics
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
  • Health Sciences › Medicine › Pediatrics, Perinatology and Child Health › Fetal and Pediatric Neurological Disorders
Keywords
ERK signaling, copy number variation, cortical development, cyclin D1, p27, neuronal excitability, neuronal network activity, anxiety, working memory, hippocampal-dependent memory, malformations of cortical development, autism spectrum disorder, mitogen-activated protein kinase, mouse model
MeSH terms
Animals, Antimetabolites, Anxiety, Behavior, Animal, Bromodeoxyuridine, Cerebral Cortex, Cognition Disorders, Conditioning, Operant, Image Processing, Computer-Assisted, Immunohistochemistry, Male, Mice, Inbred C57BL, Nerve Net, Nervous System Diseases, Neurons, Stem Cells, Blotting, Western, Signal Transduction, Mice, Knockout, Patch-Clamp Techniques, Maze Learning, Extracellular Signal-Regulated MAP Kinases, Cell Proliferation, Mice

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