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Related Experiment Videos

NF-kappa B functions in synaptic signaling and behavior.

Mollie K Meffert1, Jolene M Chang, Brian J Wiltgen

  • 1Division of Biology, MC204-31 California Institute of Technology, Pasadena, California 91125, USA.

Nature Neuroscience
|August 30, 2003
PubMed
Summary

Calcium-regulated gene transcription, essential for learning, is activated by synaptic input via CaMKII and local calcium. NF-kappa B (nuclear factor kappa B) moves to the nucleus, altering gene expression and impacting spatial learning.

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Genetics

Background:

  • Calcium (Ca2+)-regulated gene transcription is crucial for physiological processes, particularly learning and memory.
  • Synaptic plasticity underlies adaptive changes in neuronal function.

Purpose of the Study:

  • To investigate the molecular mechanisms linking synaptic activity to gene transcription in learning.
  • To determine the role of NF-kappa B (nuclear factor kappa B) in synaptic plasticity and spatial learning.

Main Methods:

  • Studied the activation pathway of NF-kappa B by basal synaptic input.
  • Utilized Ca2+/calmodulin-dependent kinase II (CaMKII) and local Ca2+ elevation.
  • Examined the synaptic localization of the p65:p50 NF-kappa B complex.
  • Assessed spatial learning deficits in p65-deficient mice using the radial arm maze.

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Main Results:

  • Basal synaptic input activates NF-kappa B through a pathway involving CaMKII and local Ca2+.
  • The p65:p50 NF-kappa B form is specifically localized at synapses.
  • Mice lacking p65 exhibit impaired spatial learning in the radial arm maze.
  • Activated NF-kappa B translocates to the nucleus, potentially altering gene expression.

Conclusions:

  • Synaptic stimulation triggers NF-kappa B activation and nuclear translocation.
  • NF-kappa B plays a critical role in regulating gene expression for long-term neuronal function changes.
  • NF-kappa B is essential for spatial learning and memory consolidation.