Cited by 67Neuroscience and Neuropharmacology ResearchGenetics and Neurodevelopmental DisordersAxon Guidance and Neuronal Signaling

DSCAM Contributes to Dendrite Arborization and Spine Formation in the Developing Cerebral Cortex

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Maynard, Kristen R., Stein, Elke·2012·The Journal of Neuroscience

Abstract

Down syndrome cell adhesion molecule, or DSCAM, has been implicated in many neurodevelopmental processes including axon guidance, dendrite arborization, and synapse formation. Here we show that DSCAM plays an important role in regulating the morphogenesis of cortical pyramidal neurons in the mouse. We report that DSCAM expression is developmentally regulated and localizes to synaptic plasma membranes during a time of robust cortical dendrite arborization and spine formation. Analysis of mice that carry a spontaneous mutation in DSCAM (DSCAM del17)revealed gross morphological changes in brain size and shape in addition to subtle changes in cortical organization, volume, and lamination. Early postnatal mutant mice displayed a transient decrease in cortical thickness, but these reductions could not be attributed to changes in neuron production or cell death.DSCAM del17mutants showed temporary impairments in the branching of layer V pyramidal neuron dendrites at P10 and P17 that recovered to normal by adulthood. Defects in DSCAM del17dendrite branching correlated with a temporal increase in apical branch spine density and lasting changes in spine morphology. At P15 and P42, mutant mice displayed a decrease in the percentage of large, stable spines and an increase in the percentage of small, immature spines. Together, our findings suggest that DSCAM contributes to pyramidal neuron morphogenesis by regulating dendrite arborization and spine formation during cortical circuit development.

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Crossref · 10.1523/jneurosci.2811-12.2012

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  • Young Dscamdel17 mutant mice have fewer long spines and more spines with small head size, and the number of long and large spines increases with age.

    “Although young Dscamdel17 mutant mice have fewer long spines and more spines with small head size, the number of long and large spines increases with age [230].”

    From Autism spectrum disorder: neuropathology and animal models (2017) · cites this paper as [230]

  • Dscamdel17 mutant mice show altered dendritic morphology of layer V pyramidal neurons compared with wild-type, with an early increase in apical dendritic branching, reduced dendritic length, and higher spine density that normalize by adulthood.

    “These mice also showed altered dendritic morphology of layer V pyramidal neurons compared to WT controls, starting with an early increase in apical dendritic branching, reduced dendritic length and higher spine density, which were normalized by adulthood.”

    From Autism spectrum disorder: neuropathology and animal models (2017) · cites this paper as [230]

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Authors
Maynard, K. R., & Stein, E.
Affiliations
Yale University (US)
Venue
The Journal of Neuroscience
Published
2012-11-21
Volume
32
Issue
47
Pages
16637-16650
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2040305049
Cited by
67
References
54
Citations by year
2026: 4 · 2025: 2 · 2024: 3 · 2023: 1 · 2022: 3 · 2021: 8 · 2020: 4 · 2019: 7 · 2018: 5 · 2017: 9 · 2016: 3 · 2015: 8 · 2014: 6 · 2013: 4
FWCI
2.37
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institute of Neurological Disorders and Stroke (T32-NS41228, T32NS041228)
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (T32HD007180)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Axon Guidance and Neuronal Signaling
Keywords
Dscam, dendritic branching, dendritic spine formation, cortical pyramidal neurons, cortical development, neuronal morphogenesis, cortical lamination, cortical thickness, dendritic spine morphology
MeSH terms
Animals, Antimetabolites, Bromodeoxyuridine, Cells, Cultured, Cerebral Cortex, Dendrites, Female, Flow Cytometry, Fluorescent Antibody Technique, Male, Mutation, Pregnancy, RNA, Messenger, Subcellular Fractions, Blotting, Western, Cell Adhesion Molecules, In Situ Hybridization, Pyramidal Cells, Gene Expression Regulation, Developmental, In Situ Nick-End Labeling, Dendritic Spines, Mice, Real-Time Polymerase Chain Reaction

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