Shank expression is sufficient to induce functional dendritic spine synapses in aspiny neurons

Gautier Roussignol, Fabrice Ango, Stefano Romorini, Jian Cheng Tu, Carlo Sala, Paul F. Worley, Joël Bockaert, Laurent Fagni

Research output: Contribution to journalArticlepeer-review

Abstract

Shank proteins assemble glutamate receptors with their intracellular signaling apparatus and cytoskeleton at the postsynaptic density. Whether Shank plays a role in spinogenesis and synaptogenesis remained unclear. Here, we report that knock-down of Shank3/prolinerich synapse-associated protein-2 by RNA interference reduces spine density in hippocampal neurons. Moreover, transgene expression of Shank 3 is sufficient to induce functional dendritic spines in aspiny cerebellar neurons. Transfected Shank protein recruits functional glutamate receptors, increases the number and size of synaptic contacts, and increases amplitude, frequency, and the AMPA component of miniature EPSCs, similar to what is observed during synapse developmental maturation. Mutation/deletion approaches indicate that these effects require interactions of Shank3 with the glutamate receptor complex. Consistent with this observation, chronic treatment with glutamate receptor antagonists alters maturation of the Shank3-induced spines. These results strongly suggest that Shank proteins and the associated glutamate receptors participate in a concerted manner to form spines and functional synapses.

Original languageEnglish (US)
Pages (from-to)3560-3570
Number of pages11
JournalJournal of Neuroscience
Volume25
Issue number14
DOIs
StatePublished - Apr 6 2005

Keywords

  • Glutamate
  • Granule cell
  • Patch clamp
  • Shank
  • Synapse
  • Synaptogenesis

ASJC Scopus subject areas

  • Neuroscience(all)

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