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Related Experiment Videos

cAMP/Ca2+ response element-binding protein function is essential for ocular dominance plasticity.

Amanda F Mower1, David S Liao, Eric J Nestler

  • 1Department of Anatomy and the Neuroscience Program, Virginia Commonwealth University School of Medicine, Richmond, Virginia 23298-0709, USA.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|March 16, 2002
PubMed
Summary

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Adenosine cAMP/Ca(2+) response element-binding protein (CREB) is crucial for ocular dominance plasticity in the visual cortex. Inhibiting CREB function during monocular deprivation prevents vision loss in the deprived eye, highlighting CREB

Area of Science:

  • Neuroscience
  • Molecular Biology
  • Ophthalmology

Background:

  • Monocular deprivation in amblyopia reduces visual cortex responses.
  • Molecular mechanisms of ocular dominance plasticity are largely unknown.
  • Adenosine cAMP/Ca(2+) response element-binding protein (CREB) is activated during monocular deprivation.

Purpose of the Study:

  • To investigate if CREB function is required for the loss of cortical responses to a deprived eye.
  • To elucidate the role of CREB in ocular dominance plasticity.

Main Methods:

  • Utilized herpes simplex virus (HSV) to express a dominant-negative CREB (HSV-mCREB) in the visual cortex.
  • Employed quantitative single-unit electrophysiology to assess cortical responses.
  • Administered HSV expressing functional CREB or beta-galactosidase as controls.

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Main Results:

  • Cortical expression of HSV-mCREB prevented the loss of deprived eye responses during monocular deprivation.
  • Specificity was confirmed as overexpression of functional CREB or beta-galactosidase did not block plasticity.
  • Inhibition of plasticity was reversible upon decline of mCREB expression.
  • Viral infection did not suppress sensory responses.

Conclusions:

  • CREB function is essential for ocular dominance plasticity.
  • Targeting CREB may offer therapeutic strategies for amblyopia.
  • This study reveals a key molecular player in visual cortex development and adaptation.