Cited by 38Genetics and Neurodevelopmental DisordersNeuroscience and Neuropharmacology ResearchAutism Spectrum Disorder Research

Reduced inhibitory gate in the barrel cortex of Neuroligin3R451Cknock-in mice, an animal model of autism spectrum disorders

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Cellot, Giada, Cherubini, Enrico·2014·Physiological Reports

Abstract

Neuroligins are postsynaptic adhesion molecules that interacting with presynaptic neurexins ensure the cross-talk between pre- and postsynaptic specializations. Rare mutations in neurexin-neuroligin genes have been linked to autism spectrum disorders (ASDs). One of these, the R451C mutation of the gene encoding for Neuroligin3 (Nlgn3), has been found in patients with familial forms of ASDs. Animals carrying this mutation (NL3(R451C) knock-in mice) exhibit impaired social behaviors, reminiscent of those observed in ASD patients, associated with major alterations in both GABAergic and glutamatergic transmission, which vary among different brain regions and at different developmental stages. Here, pair recordings from parvalbumin- (PV) expressing basket cells and spiny neurons were used to study GABAergic synaptic signaling in layer IV barrel cortex of NL3(R451C) mutant mice. We found that the R451C mutation severely affects the probability of GABA release from PV-expressing basket cells, responsible for controlling via thalamo-cortical inputs the feed-forward inhibition. No changes in excitatory inputs to parvalbumin-positive basket cells or spiny neurons were detected. These data clearly show that primary targets of the NL3 mutation are PV-expressing basket cells, independently of the brain region where they are localized. Changes in the inhibitory gate of layer IV somatosensory cortex may alter sensory processing in ASD patients leading to misleading sensory representations with difficulties to combine pieces of information into a unified perceptual whole.

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  1. Varoqueaux F. Aramuni G. Rawson R. L. Mohrmann R. Missler M. Gottmann K. 2006 Neuroligins determines synapses maturation and function. Neuron; 51: 741- 754. 16982420

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Authors
Cellot, G., & Cherubini, E.
Affiliations
Scuola Internazionale Superiore di Studi Avanzati (IT)
Corresponding author
Cherubini, Enrico
Venue
Physiological Reports
Publisher
Wiley
Published
2014-07
Volume
2
Issue
7
Pages
e12077
ISSN
2051-817X (ISSN-L)
OpenAlex
W2161723579
Cited by
38
References
67
Citations by year
2025: 4 · 2024: 1 · 2023: 2 · 2022: 2 · 2021: 2 · 2020: 3 · 2019: 2 · 2018: 6 · 2017: 7 · 2016: 4 · 2015: 3 · 2014: 2
FWCI
3.49
Type
journal article
Language
en
Open access
Locations
  • Physiological Reports (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • ArTS Archivio della ricerca di Trieste (University of Trieste https://www.units.it/) (submittedVersion)
  • SDL (submittedVersion, other-oa)
Funders
  • Ministero dell'Istruzione, dell'Universita' e della Ricerca (PRIN 2011)
  • Telethon (GGP11043)
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
autism spectrum disorder, barrel cortex, parvalbumin basket cells, GABAergic inhibition, feedforward inhibition, thalamocortical input, somatosensory cortex, synaptic transmission, sensory processing

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