Cited by 60Neuroscience and Neuropharmacology ResearchGenetics and Neurodevelopmental DisordersAutism Spectrum Disorder Research

Pathogenic mechanism of an autism-associated neuroligin mutation involves altered AMPA-receptor trafficking

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Chanda, S, Aoto, J, Lee, S-J, Wernig, M, Südhof, T C·2016·Molecular Psychiatry

Abstract

Neuroligins are postsynaptic cell-adhesion molecules that bind to presynaptic neurexins. Although the general synaptic role of neuroligins is undisputed, their specific functions at a synapse remain unclear, even controversial. Moreover, many neuroligin gene mutations were associated with autism, but the pathophysiological relevance of these mutations is often unknown, and their mechanisms of action uninvestigated. Here, we examine the synaptic effects of an autism-associated neuroligin-4 substitution (called R704C), which mutates a cytoplasmic arginine residue that is conserved in all neuroligins. We show that the R704C mutation, when introduced into neuroligin-3, enhances the interaction between neuroligin-3 and AMPA receptors, increases AMPA-receptor internalization and decreases postsynaptic AMPA-receptor levels. When introduced into neuroligin-4, conversely, the R704C mutation unexpectedly elevated AMPA-receptor-mediated synaptic responses. These results suggest a general functional link between neuroligins and AMPA receptors, indicate that both neuroligin-3 and -4 act at excitatory synapses but perform surprisingly distinct functions, and demonstrate that the R704C mutation significantly impairs the normal function of neuroligin-4, thereby validating its pathogenicity.

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  • Nlgn3R704C KI mice show decreased AMPA but not NMDA or GABA receptor-mediated hippocampal neurotransmission, possibly due to increased internalization of AMPA receptors.

    “Another mouse model mimicking an ASD-related mutation [393], the Nlgn3R704C KI shows decreased α-amino-3-hydroxyl-5-methyl-4-isoxazole-propionic acid (AMPA), but not N-Methyl-D-aspartic acid (NMDA) or GABA, receptor-mediated hippocampal neurotransmission [100], possibly due to increased internalization of AMPA receptors [62].”

    From Autism spectrum disorder: neuropathology and animal models (2017) · cites this paper as [62]

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Authors
Chanda, S., Aoto, J., Lee, S.-J., Wernig, M., & Südhof, T. C.
Affiliations
  • Howard Hughes Medical Institute (US)
  • Stanford Medicine (US)
Corresponding author
Südhof, T C
Venue
Molecular Psychiatry
Published
2015-03-17
Volume
21
Issue
2
Pages
169-177
ISSN
  • 1359-4184 (ISSN-L)
  • 1476-5578
OpenAlex
W2082967233
Cited by
60
References
31
Citations by year
2026: 1 · 2025: 3 · 2024: 3 · 2023: 5 · 2022: 6 · 2021: 3 · 2020: 8 · 2019: 4 · 2018: 5 · 2017: 10 · 2016: 7 · 2015: 5
FWCI
4.20
Type
journal article
Language
en
Open access
Locations
  • Molecular Psychiatry (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • New York Stem Cell Foundation
  • National Institutes of Health
  • National Institute of Mental Health (MH-092931, R01MH092931, MH103531-01, R00MH103531, R37MH052804, K99MH103531)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Autism Spectrum Disorder Research
Keywords
neuroligins, neuroligin 4, neuroligin-3, autism spectrum disorder, AMPA receptor trafficking, receptor internalization, postsynaptic receptors, excitatory synapses, neurexin, adhesion molecules, synaptic function
MeSH terms
Animals, Autistic Disorder, Hippocampus, Membrane Proteins, Mice, Inbred Strains, Mutation, Nerve Tissue Proteins, Synaptic Transmission, Neurons, Olfactory Bulb, Synapses, Cell Adhesion Molecules, Neuronal, Receptors, AMPA, alpha-Amino-3-hydroxy-5-methyl-4-isoxazolepropionic Acid, Cell Culture Techniques

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