Cited by 84Autism Spectrum Disorder ResearchGenetics and Neurodevelopmental DisordersNeuroscience and Neuropharmacology Research

Deletion of α-neurexin II results in autism-related behaviors in mice

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Dachtler, J, Glasper, J, Cohen, R N, Ivorra, J L, Swiffen, D J, Jackson, A J, Harte, M K, Rodgers, R J +1 more·2014·Translational Psychiatry

Abstract

Autism is a common and frequently disabling neurodevelopmental disorder with a strong genetic basis. Human genetic studies have discovered mutations disrupting exons of the NRXN2 gene, which encodes the synaptic adhesion protein α-neurexin II (Nrxn2α), in two unrelated individuals with autism, but a causal link between NRXN2 and the disorder remains unclear. To begin to test the hypothesis that Nrxn2α deficiency contributes to the symptoms of autism, we employed Nrxn2α knockout (KO) mice that genetically model Nrxn2α deficiency in vivo. We report that Nrxn2α KO mice displayed deficits in sociability and social memory when exposed to novel conspecifics. In tests of exploratory activity, Nrxn2α KO mice displayed an anxiety-like phenotype in comparison with wild-type littermates, with thigmotaxis in an open field, less time spent in the open arms of an elevated plus maze, more time spent in the enclosure of an emergence test and less time spent exploring novel objects. However, Nrxn2α KO mice did not exhibit any obvious changes in prepulse inhibition or in passive avoidance learning. Real-time PCR analysis of the frontal cortex and hippocampus revealed significant decreases in the mRNA levels of genes encoding proteins involved in both excitatory and inhibitory transmission. Quantification of protein expression revealed that Munc18-1, encoded by Stxbp1, was significantly decreased in the hippocampus of Nrxn2α KO mice, which is suggestive of deficiencies in presynaptic vesicular release. Our findings demonstrate a causal role for the loss of Nrxn2α in the genesis of autism-related behaviors in mice.

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  • oASD mice show increased inclusion rate of a mutually exclusive exon in Neurexin-2 (Nrxn2).

    “We observed an increased inclusion rate of a mutually exclusive exon (MXE) in Neurexin-2 (Nrxn2), a presynaptic adhesion protein strongly linked to ASD (Dachtler et al., 2014; Südhof, 2008) (Figure 3F).”

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Authors
Dachtler, J., Glasper, J., Cohen, R. N., Ivorra, J. L., Swiffen, D. J., Jackson, A. J., Harte, M. K., Rodgers, R. J., & Clapcote, S. J.
Affiliations
  • University of Leeds (GB)
  • University of Manchester (GB)
Corresponding author
Dachtler, J
Venue
Translational Psychiatry
Published
2014-11-25
Volume
4
Issue
11
Pages
e484-e484
ISSN
2158-3188 (ISSN-L)
OpenAlex
W2119747299
Cited by
84
References
52
Citations by year
2026: 5 · 2025: 2 · 2024: 3 · 2023: 7 · 2022: 5 · 2021: 6 · 2020: 9 · 2019: 11 · 2018: 11 · 2017: 10 · 2016: 6 · 2015: 8 · 2013: 1
FWCI
4.46
Type
journal article
Language
en
Open access
Locations
  • Translational Psychiatry (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Research Explorer (The University of Manchester) (publishedVersion, other-oa)
  • White Rose Research Online (University of Leeds, The University of Sheffield, University of York) (acceptedVersion)
  • Durham Research Online (Durham University) (acceptedVersion, cc-by)
  • Durham Research Online (Durham University) (submittedVersion, cc-by)
Funders
  • Wellcome Trust
  • International Seafood Sustainability Foundation
  • British Pharmacological Society
  • University of Leeds
  • Medical Research Council (G0900625)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Autism Spectrum Disorder Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
autism spectrum disorder, sociability, social memory, anxiety-like behavior, Munc18-1, STXBP1, hippocampus, frontal cortex, synaptic adhesion proteins
MeSH terms
Animals, Anxiety, Autistic Disorder, Avoidance Learning, Behavior, Animal, Cerebral Cortex, Hippocampus, Mice, Inbred C57BL, Nerve Tissue Proteins, Synaptic Transmission, Social Behavior, Mice, Knockout, Mice, Prepulse Inhibition

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