Cited by 1,046Genetics and Neurodevelopmental DisordersNeuroscience and Neuropharmacology ResearchRNA Research and Splicing

The DOI matches its Crossref record; 30 of the 30 references it cites were found in a registry or an index.

Abnormal dendritic spines in fragile X knockout mice: Maturation and pruning deficits

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Abstract

Fragile X syndrome arises from blocked expression of the fragile X mental retardation protein (FMRP). Golgi-impregnated mature cerebral cortex from fragile X patients exhibits long, thin, tortuous postsynaptic spines resembling spines observed during normal early neocortical development. Here we describe dendritic spines in Golgi-impregnated cerebral cortex of transgenic fragile X gene ( Fmr1 ) knockout mice that lack expression of the protein. Dendritic spines on apical dendrites of layer V pyramidal cells in occipital cortex of fragile X knockout mice were longer than those in wild-type mice and were often thin and tortuous, paralleling the human syndrome and suggesting that FMRP expression is required for normal spine morphological development. Moreover, spine density along the apical dendrite was greater in the knockout mice, which may reflect impaired developmental organizational processes of synapse stabilization and elimination or pruning.

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Research works printed but not linked: 4

  1. W T Brown Am J Hum Genet 58, 903–905 (1996).
  2. Cell 78, 23–33 (1994).
  3. C H Horner, E Arbuthnott J Anat 177, 179–184 (1991).
  4. D P Purpura Adv Neurol 12, 91–134 (1975).

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Metadata

Authors
Comery, T. A., Harris, J. B., Willems, P. J., Oostra, B. A., Irwin, S. A., Weiler, I. J., & Greenough, W. T.
Affiliations
University of Antwerp (BE)
Venue
Proceedings of the National Academy of Sciences
Published
1997-05-13
Volume
94
Issue
10
Pages
5401-5404
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2022959185
Cited by
1,046
References
30
Citations by year
2026: 15 · 2025: 14 · 2024: 28 · 2023: 20 · 2022: 35 · 2021: 24 · 2020: 34 · 2019: 38 · 2018: 35 · 2017: 52 · 2016: 41 · 2015: 45 · 2014: 64 · 2013: 57 · 2012: 43
FWCI
14.68
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • EUR Research Repository (Erasmus University Rotterdam) (submittedVersion)
Funders
  • FRAXA Research Foundation (MH35321)
  • John D. and Catherine T. MacArthur Foundation
  • National Institute of Mental Health (MH-35321, R01MH035321, R37MH035321)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA Research and Splicing
Keywords
fragile X syndrome, FMRP, Fmr1 knockout mice, dendritic spines, dendritic spine morphology, synaptic pruning, synapse stabilization, layer 5 pyramidal neurons, occipital cortex, Golgi impregnation, postsynaptic spines
MeSH terms
Animals, Cerebral Cortex, Dendrites, Female, Fragile X Syndrome, Golgi Apparatus, Humans, Mice, Inbred Strains, Occipital Lobe, Pyramidal Cells, Mice, Knockout, Mice

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