Cited by 197Neuroscience and Neuropharmacology ResearchGenetics and Neurodevelopmental DisordersAutism Spectrum Disorder Research

Importance of Shank3 Protein in Regulating Metabotropic Glutamate Receptor 5 (mGluR5) Expression and Signaling at Synapses

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Verpelli, Chiara, Dvoretskova, Elena, Vicidomini, Cinzia, Rossi, Francesca, Chiappalone, Michela, Schoen, Michael, Di Stefano, Bruno, Mantegazza, Renato +4 more·2011·Journal of Biological Chemistry

Abstract

Shank3/PROSAP2 gene mutations are associated with cognitive impairment ranging from mental retardation to autism. Shank3 is a large scaffold postsynaptic density protein implicated in dendritic spines and synapse formation; however, its specific functions have not been clearly demonstrated. We have used RNAi to knockdown Shank3 expression in neuronal cultures and showed that this treatment specifically reduced the synaptic expression of the metabotropic glutamate receptor 5 (mGluR5), but did not affect the expression of other major synaptic proteins. The functional consequence of Shank3 RNAi knockdown was impaired signaling via mGluR5, as shown by reduction in ERK1/2 and CREB phosphorylation induced by stimulation with (S)-3,5-dihydroxyphenylglycine (DHPG) as the agonist of mGluR5 receptors, impaired mGluR5-dependent synaptic plasticity (DHPG-induced long-term depression), and impaired mGluR5-dependent modulation of neural network activity. We also found morphological abnormalities in the structure of synapses (spine number, width, and length) and impaired glutamatergic synaptic transmission, as shown by reduction in the frequency of miniature excitatory postsynaptic currents (mEPSC). Notably, pharmacological augmentation of mGluR5 activity using 3-cyano-N-(1,3-diphenyl-1H-pyrazol-5-yl)-benzamide as the positive allosteric modulator of these receptors restored mGluR5-dependent signaling (DHPG-induced phosphorylation of ERK1/2) and normalized the frequency of mEPSCs in Shank3-knocked down neurons. These data demonstrate that a deficit in mGluR5-mediated intracellular signaling in Shank3 knockdown neurons can be compensated by 3-cyano-N-(1,3-diphenyl-1H-pyrazol-5-yl)-benzamide; this raises the possibility that pharmacological augmentation of mGluR5 activity represents a possible new therapeutic approach for patients with Shank3 mutations.

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  • In cultured rat neurons, knockdown of Shank3 selectively reduces synaptic mGluR5 receptors and impairs mGluR5-dependent signaling and plasticity.

    “In cultured rat neurons, knock-down of Shank3 selectively reduces synaptic mGluR5 receptor and impairs mGluR5-dependent signaling and plasticity (Verpelli et al., 2011).”

    From Modeling Autism by SHANK Gene Mutations in Mice (2013) · cites this paper as Verpelli et al., 2011

  • Acute knockdown of Shank3 in cultured neurons decreases mGluR-dependent plasticity.

    “Moreover, acute knockdown of Shank3 in cultured neurons decreases mGluR-dependent plasticity (Verpelli et al., 2011)”

    From Modeling Autism by SHANK Gene Mutations in Mice (2013) · cites this paper as Verpelli et al., 2011

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Authors
Verpelli, C., Dvoretskova, E., Vicidomini, C., Rossi, F., Chiappalone, M., Schoen, M., Di Stefano, B., Mantegazza, R., Broccoli, V., Böckers, T. M., Dityatev, A., & Sala, C.
Affiliations
  • University of Milan (IT)
  • Italian Institute of Technology (IT)
  • Universität Ulm (DE)
  • Fondazione IRCCS Istituto Neurologico Carlo Besta (IT)
  • IRCCS Ospedale San Raffaele (IT)
Corresponding author
Sala, Carlo
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2011-10
Volume
286
Issue
40
Pages
34839-34850
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2073501423
Cited by
197
References
70
Citations by year
2026: 4 · 2025: 9 · 2024: 5 · 2023: 15 · 2022: 15 · 2021: 12 · 2020: 13 · 2019: 12 · 2018: 13 · 2017: 9 · 2016: 20 · 2015: 14 · 2014: 15 · 2013: 23 · 2012: 14
FWCI
7.28
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by-nc)
  • PubMed (publishedVersion)
  • CINECA IRIS Institutial Research Information System (University of Genoa) (submittedVersion)
Funders
  • Fondazione Cariplo
  • Istituto Italiano di Tecnologia
  • Regione Lombardia
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
SHANK3, metabotropic glutamate receptor 5, postsynaptic density, synaptogenesis, dendritic spines, synaptic plasticity, long-term depression, ERK1/2 phosphorylation, CREB phosphorylation, DHPG, miniature excitatory postsynaptic currents, glutamatergic neurotransmission, positive allosteric modulators, autism spectrum disorder, intellectual disability
MeSH terms
Animals, Hippocampus, Mice, Inbred C57BL, Models, Biological, Nerve Tissue Proteins, Neurons, Phosphorylation, Synapses, Signal Transduction, Receptors, N-Methyl-D-Aspartate, Receptors, AMPA, Receptors, Metabotropic Glutamate, Adaptor Proteins, Signal Transducing, Dendritic Spines, Mice, Rats, Receptor, Metabotropic Glutamate 5

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