Cited by 240Genetics and Neurodevelopmental DisordersNeurogenesis and neuroplasticity mechanismsNeuroscience and Neuropharmacology Research

Mecp2 deficiency leads to delayed maturation and altered gene expression in hippocampal neurons

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Smrt, Richard D., Eaves-Egenes, Julialea, Barkho, Basam Z., Santistevan, Nicholas J., Zhao, Chunmei, Aimone, James B., Gage, Fred H., Zhao, Xinyu·2007·Neurobiology of Disease

Abstract

It is well known that Rett Syndrome, a severe postnatal childhood neurological disorder, is mostly caused by mutations in the MECP2 gene. However, how deficiencies in MeCP2 contribute to the neurological dysfunction of Rett Syndrome is not clear. We aimed to resolve the role of MeCP2 epigenetic regulation in postnatal brain development in an Mecp2-deficient mouse model. We found that, while Mecp2 was not critical for the production of immature neurons in the dentate gyrus (DG) of the hippocampus, the newly generated neurons exhibited pronounced deficits in neuronal maturation, including delayed transition into a more mature stage, altered expression of presynaptic proteins and reduced dendritic spine density. Furthermore, analysis of gene expression profiles of isolated DG granule neurons revealed abnormal expression levels of a number of genes previously shown to be important for synaptogenesis. Our studies suggest that MeCP2 plays a central role in neuronal maturation, which might be mediated through epigenetic control of expression pathways that are instrumental in both dendritic development and synaptogenesis.

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Crossref · 10.1016/j.nbd.2007.04.005

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  • These changes are apparently due to a delay in development and synapse formation in neurons resulting from Mecp2 haploinsufficiency, abnormalities that do not recover with age.

    “These changes are apparently due to a delay in development and synapse formation in neurons resulting from Mecp2 haploinsufficiency [115, 330], which are abnormalities in development that do not recover with age.”

    From Autism spectrum disorder: neuropathology and animal models (2017) · cites this paper as [330]

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Authors
Smrt, R. D., Eaves-Egenes, J., Barkho, B. Z., Santistevan, N. J., Zhao, C., Aimone, J. B., Gage, F. H., & Zhao, X.
Affiliations
  • University of New Mexico (US)
  • Salk Institute for Biological Studies (US)
Corresponding author
Zhao, Xinyu
Venue
Neurobiology of Disease
Publisher
Elsevier BV
Published
2007-07
Volume
27
Issue
1
Pages
77-89
ISSN
0969-9961 (ISSN-L)
OpenAlex
W1985334727
Cited by
239
References
71
Citations by year
2026: 5 · 2025: 13 · 2024: 10 · 2023: 4 · 2022: 6 · 2021: 8 · 2020: 7 · 2019: 12 · 2018: 13 · 2017: 22 · 2016: 13 · 2015: 10 · 2014: 19 · 2013: 16 · 2012: 16
FWCI
8.03
Type
journal article
Language
en
Open access
Locations
  • Neurobiology of Disease (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • School of Medicine, University of New Mexico
  • National Institute of Mental Health (R01MH080434)
  • National Institute of General Medical Sciences (T34GM008751)
  • National Center for Research Resources (P20RR015636)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
MeCP2, MeCP2 deficiency, Rett syndrome, hippocampus, dentate gyrus, granule neurons, neuronal maturation, dendritic spine density, synaptogenesis, presynaptic proteins, epigenetic regulation, postnatal brain development, gene expression profiling
MeSH terms
Animals, Animals, Newborn, Cell Differentiation, Mice, Inbred ICR, Neurons, Rett Syndrome, Presynaptic Terminals, Mice, Knockout, Gene Expression Regulation, Developmental, Dentate Gyrus, Epigenesis, Genetic, Dendritic Spines, Mice, Methyl-CpG-Binding Protein 2

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