Cited by 979Genetics and Neurodevelopmental DisordersNeuroscience and Neuropharmacology ResearchAutism Spectrum Disorder Research

Correction of Fragile X Syndrome in Mice

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Dölen, Gül, Osterweil, Emily, Rao, B.S. Shankaranarayana, Smith, Gordon B., Auerbach, Benjamin D., Chattarji, Sumantra, Bear, Mark F.·2007·Neuron

Abstract

Fragile X syndrome (FXS) is the most common form of heritable mental retardation and the leading identified cause of autism. FXS is caused by transcriptional silencing of the FMR1 gene that encodes the fragile X mental retardation protein (FMRP), but the pathogenesis of the disease is unknown. According to one proposal, many psychiatric and neurological symptoms of FXS result from unchecked activation of mGluR5, a metabotropic glutamate receptor. To test this idea we generated Fmr1 mutant mice with a 50% reduction in mGluR5 expression and studied a range of phenotypes with relevance to the human disorder. Our results demonstrate that mGluR5 contributes significantly to the pathogenesis of the disease, a finding that has significant therapeutic implications for fragile X and related developmental disorders.

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Crossref · 10.1016/j.neuron.2007.12.001

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  • A 50% reduction in mGluR5 expression decreased excess translation and improved behavior in the fragile X mouse model.

    “A 50% reduction in mGluR5 expression decreased excess translation and improved behavior in the fragile X mouse model 42 .”

    From Progress toward treatments for synaptic defects in autism (2013) · cites this paper as [42]

  • A similar suppressor effect has been demonstrated by the decrease of abnormal behavior of the Fmr1 mutant mice carrying a heterozygous mutation of the metabotropic glutamate receptor mGluR5.

    “A similar suppressor effect has been demonstrated by the decrease of abnormal behavior of the Fmr1 mutant mice carrying a heterozygous mutation of the metabotropic glutamate receptor mGluR5 [84].”
  • These findings are the basis of human clinical trials testing mGluR5 antagonists for Fragile X syndrome.

    “These findings are the basis of human clinical trials that aim to test the efficacy of mGluR5 antagonists for the treating Fragile X syndrome23,56–58.”
  • Fmr1 mutant mice have a significant delay in the stabilization of dendritic spines and in the maturation of thalamocortical and corticocortical synapses, defects associated with a temporal shift in the critical period for sensory-induced plasticity across different cortical areas.

    “Fmr1 mutant mice have a significant delay in the stabilization of dendritic spines and in the maturation of thalamocortical and corticocortical synapses 94-98 , defects associated with a temporal shift in the critical period for sensory-induced plasticity across different cortical areas 94,97,99-101 .”
  • Preclinical studies have primarily focused on mGluR5 signaling as potential targets for treatment in adult mice.

    “Preclinical studies have primarily focused on mGluR5 signaling as potential targets for treatment in adult mice 99,110-113 .”

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Authors
Dölen, G., Osterweil, E., Rao, B. S. S., Smith, G. B., Auerbach, B. D., Chattarji, S., & Bear, M. F.
Affiliations
  • Howard Hughes Medical Institute (US)
  • National Institute of Mental Health and Neurosciences (IN)
  • Tata Institute of Fundamental Research (IN)
Corresponding author
Bear, Mark F.
Venue
Neuron
Publisher
Elsevier BV
Published
2007-12
Volume
56
Issue
6
Pages
955-962
ISSN
0896-6273 (ISSN-L)
OpenAlex
W2084889756
Cited by
979
References
39
Citations by year
2026: 19 · 2025: 26 · 2024: 19 · 2023: 26 · 2022: 30 · 2021: 42 · 2020: 44 · 2019: 41 · 2018: 35 · 2017: 57 · 2016: 62 · 2015: 73 · 2014: 65 · 2013: 81 · 2012: 87
Type
journal article
Language
en
Open access
Locations
  • Neuron (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • Edinburgh Research Explorer (University of Edinburgh) (submittedVersion, other-oa)
Funders
  • Simons Foundation
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development
  • National Institute of Mental Health
  • FRAXA Research Foundation
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 › Neuroscience › Cognitive Neuroscience › Autism Spectrum Disorder Research
Keywords
fragile X syndrome, FMRP, FMR1 gene silencing, mGluR5, metabotropic glutamate receptors, autism spectrum disorder, intellectual disability, pathogenesis, therapeutic target
MeSH terms
Acoustic Stimulation, Animals, Behavior, Animal, Disease Models, Animal, Fragile X Syndrome, Gene Expression Regulation, Heterozygote, Functional Laterality, Learning, Mice, Inbred C57BL, Neuronal Plasticity, Neurons, Phenotype, Seizures, Visual Cortex, Multivariate Analysis, Receptors, Metabotropic Glutamate, Mice, Knockout, Mice, Fragile X Messenger Ribonucleoprotein 1, Receptor, Metabotropic Glutamate 5

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