Cited by 80Genetics and Neurodevelopmental DisordersNeuroscience and Neuropharmacology ResearchTreatment of Major Depression

Excitatory synapses are stronger in the hippocampus of Rett syndrome mice due to altered synaptic trafficking of AMPA-type glutamate receptors

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Li, Wei, Xu, Xin, Pozzo-Miller, Lucas·2016·Proceedings of the National Academy of Sciences

Abstract

Significance: Rett syndrome is the most common intellectual disability in women after Down syndrome (1:10,000 incidence). Different mouse models of intellectual disability and autism exhibit deficits in synaptic plasticity, including impaired long-term potentiation (LTP) in mice lacking methyl-CpG-binding protein 2 (MeCP2); however, the bases of this deficit remain unclear. Using a combination of electrophysiology, time-lapse imaging, cell biology, and biochemistry, we provide direct evidence that naïve hippocampal synapses in Rett mice have all the hallmarks of potentiated synapses. Rett synapses also fail to insert and remove AMPA receptors properly to activated synapses, which freezes them in a nonplastic state. Our findings provide molecular, cellular, and network mechanisms underlying enhanced excitatory synaptic transmission and impaired LTP in Rett mice, identifying previously unidentified molecular targets for therapeutic intervention.

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  • MeCp2 deficiency results in reduction of glutamatergic synapses and increased basal levels of AMPA, indicating a failure in activity-dependent synaptic trafficking of the receptor.

    “MeCp2 deficiency results in reduction of glutamatergic synapses [63] and increased basal levels of AMPA, indicating a failure in activity-dependent synaptic trafficking of the receptor [217].”

    From Autism spectrum disorder: neuropathology and animal models (2017) · cites this paper as [217]

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  1. Blue ME, Naidu S, Johnston MV (1999) Development of amino acid receptors in frontal cortex from girls with Rett syndrome. Ann Neurol 45(4):541-545.

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Authors
Li, W., Xu, X., & Pozzo-Miller, L.
Affiliations
  • University of Alabama at Birmingham (US)
  • Department of Neurobiology, University of Alabama at Birmingham, Birmingham, AL 35294
Venue
Proceedings of the National Academy of Sciences
Published
2016-02-29
Volume
113
Issue
11
Pages
E1575-84
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2292245145
Cited by
80
References
65
Citations by year
2026: 2 · 2025: 6 · 2024: 9 · 2023: 4 · 2022: 10 · 2021: 6 · 2020: 6 · 2019: 11 · 2018: 10 · 2017: 14 · 2016: 2
FWCI
9.95
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion, other-oa)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Rettsyndrome.org (IRSF-2824, IRSF-3117)
  • HHS | NIH | National Institute of Neurological Disorders and Stroke (NS-065027)
  • HHS | NIH | National Institute of Child Health and Human Development (HD-074418)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Health Sciences › Medicine › Pharmacology › Treatment of Major Depression
Keywords
Rett syndrome, AMPA receptor trafficking, GluA1 subunit, long-term potentiation, excitatory synapses, hippocampal pyramidal neurons, synaptic potentiation, dendritic spines, intellectual disability, autism spectrum disorder
MeSH terms
Discs Large Homolog 1 Protein, Animals, Disease Models, Animal, Female, Hippocampus, Male, Membrane Proteins, Mice, Inbred C57BL, Neurons, Synapses, Rett Syndrome, Receptors, N-Methyl-D-Aspartate, Long-Term Potentiation, Receptors, AMPA, Mice, Knockout, Protein Transport, Vesicular Transport Proteins, Guanylate Kinases, Methyl-CpG-Binding Protein 2

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