Interneurons and oligodendrocyte progenitors form a structured synaptic network in the developing neocortex

David Orduz, Paloma P Maldonado, Maddalena Balia, Mateo Vélez-Fort, Vincent de Sars, Yuchio Yanagawa, Valentina Emiliani, Maria Cecilia Angulo

Research output: Contribution to journal/periodicalArticleScientificpeer-review

68 Citations (Scopus)
133 Downloads (Pure)


NG2 cells, oligodendrocyte progenitors, receive a major synaptic input from interneurons in the developing neocortex. It is presumed that these precursors integrate cortical networks where they act as sensors of neuronal activity. We show that NG2 cells of the developing somatosensory cortex form a transient and structured synaptic network with interneurons that follows its own rules of connectivity. Fast-spiking interneurons, highly connected to NG2 cells, target proximal subcellular domains containing GABAA receptors with γ2 subunits. Conversely, non-fast-spiking interneurons, poorly connected with these progenitors, target distal sites lacking this subunit. In the network, interneuron-NG2 cell connectivity maps exhibit a local spatial arrangement reflecting innervation only by the nearest interneurons. This microcircuit architecture shows a connectivity peak at PN10, coinciding with a switch to massive oligodendrocyte differentiation. Hence, GABAergic innervation of NG2 cells is temporally and spatially regulated from the subcellular to the network level in coordination with the onset of oligodendrogenesis.

Original languageEnglish
Publication statusPublished - 2015


  • Action Potentials
  • Animals
  • Bacterial Proteins
  • Cell Differentiation
  • Gene Expression
  • Genes, Reporter
  • Interneurons
  • Luminescent Proteins
  • Mice
  • Mice, Transgenic
  • Microtomy
  • Neocortex
  • Neural Stem Cells
  • Neurogenesis
  • Oligodendroglia
  • Patch-Clamp Techniques
  • Protein Subunits
  • Receptors, GABA-A
  • Somatosensory Cortex
  • Synapses
  • Synaptic Transmission
  • Tissue Culture Techniques
  • gamma-Aminobutyric Acid


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