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Related Experiment Videos

BDNF function in adult synaptic plasticity: the synaptic consolidation hypothesis.

Clive R Bramham1, Elhoucine Messaoudi

  • 1Department of Biomedicine, Bergen Mental Health Research Center, University of Bergen, Jonas Lies vei 91, 5009 Bergen, Norway. clive.bramham@biomed.uib.no

Progress in Neurobiology
|August 16, 2005
PubMed
Summary

Brain-Derived Neurotrophic Factor (BDNF) regulates synaptic plasticity and protein synthesis for memory consolidation. BDNF signaling at glutamate synapses drives mRNA translation, crucial for synaptic consolidation and brain resilience.

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Synaptic Plasticity

Background:

  • Brain-Derived Neurotrophic Factor (BDNF) modulates neuronal function in adult brains.
  • BDNF-TrkB localization at glutamate synapses suggests a role in regulating excitatory transmission and plasticity.

Purpose of the Study:

  • To integrate current knowledge on the molecular mechanisms and function of BDNF in Long-Term Potentiation (LTP).
  • To elucidate BDNF's role in synaptic consolidation and local protein synthesis.

Main Methods:

  • Review of genetic and pharmacological evidence.
  • Analysis of BDNF's distinct mechanisms in LTP induction and maintenance phases.
  • Proposed model of BDNF-mediated synaptic consolidation.

Main Results:

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  • BDNF regulates LTP induction, early, and late maintenance phases.
  • BDNF's function in LTP depends on stimulus patterns affecting BDNF release.
  • BDNF triggers protein synthesis-dependent late-phase LTP (synaptic consolidation) via Arc mRNA trafficking and translation.

Conclusions:

  • BDNF signaling at glutamate synapses drives local mRNA translation (e.g., Arc) for synaptic consolidation.
  • BDNF tags synapses for mRNA capture, with Arc translation defining a window for consolidation.
  • Understanding BDNF mechanisms informs adaptive brain responses like memory and mood resilience.