Experience-dependent Transfer of Otx2 Homeoprotein Into the Visual Cortex Activates Postnatal Plasticity

Cell. 2008 Aug 8;134(3):508-20. doi: 10.1016/j.cell.2008.05.054.

Abstract

Neural circuits are shaped by experience in early postnatal life. Distinct GABAergic connections within visual cortex determine the timing of the critical period for rewiring ocular dominance to establish visual acuity. We find that maturation of the parvalbumin (PV)-cell network that controls plasticity onset is regulated by a selective re-expression of the embryonic Otx2 homeoprotein. Visual experience promoted the accumulation of non-cell-autonomous Otx2 in PV-cells, and cortical infusion of exogenous Otx2 accelerated both PV-cell development and critical period timing. Conversely, conditional removal of Otx2 from non-PV cells or from the visual pathway abolished plasticity. Thus, the experience-dependent transfer of a homeoprotein may establish the physiological milieu for postnatal plasticity of a neural circuit.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Humans
  • Interneurons / physiology
  • Mice
  • Neuronal Plasticity*
  • Otx Transcription Factors / genetics
  • Otx Transcription Factors / metabolism*
  • Parvalbumins / metabolism
  • Recombinant Proteins / genetics
  • Recombinant Proteins / metabolism
  • Sensory Deprivation
  • Visual Cortex / physiology*
  • Visual Pathways

Substances

  • OTX2 protein, human
  • Otx Transcription Factors
  • Otx2 protein, mouse
  • Parvalbumins
  • Recombinant Proteins