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Related Experiment Videos

Dynamic modulation of cerebral cortex synaptic function by nitric oxide

P Kara1, M J Friedlander

  • 1Department of Neurobiology, University of Alabama at Birmingham, USA.

Progress in Brain Research
|February 5, 1999
PubMed
Summary
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Nitric oxide (NO) amplifies glutamate release in the cerebral cortex via NMDA and AMPA receptors, but also inhibits these receptors, modulating synaptic plasticity and visual cortex responses.

Area of Science:

  • Neuroscience
  • Cellular signaling

Background:

  • Nitric oxide (NO) is produced in the cerebral cortex through neuronal activity via NMDA and AMPA receptors.
  • NO diffuses in the extracellular space, influencing nearby synapses.

Purpose of the Study:

  • To investigate the multifaceted actions of NO in the cerebral cortex.
  • To elucidate NO's role in synaptic plasticity and information processing.

Main Methods:

  • Experimental demonstration of NO's actions in the cerebral cortex.
  • Analysis of NO's interaction with NMDA and AMPA receptors.
  • Investigation of NO's effects on L-glutamate release and synaptic plasticity.

Main Results:

  • NO amplifies L-glutamate release, creating a positive feedback system.

Related Experiment Videos

  • NO also inhibits NMDA receptors and NOS, acting as a brake.
  • NO exhibits both facilitatory and inhibitory effects on synaptic plasticity and visual cortex responses in vivo.

    • Conclusions:

    • Endogenous NO plays a crucial role in modulating cortical networks and information processing.
    • NO dynamically alters the effective strength of cortical networks in response to visual stimulation.
    • NO's diverse actions, both facilitatory and inhibitory, are essential for normal brain function.