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Related Experiment Videos

Neuron-glia metabolic coupling and plasticity.

Pierre J Magistretti1

  • 1Brain Mind Institute, Ecole Polytechnique Fédérale de Lausanne (EPFL), Switzerland and Centre de Neurosciences Psychiatriques, CHUV, Departement de Psychiatrie, Site de Cery, CH1008 Prilly/Lausanne, Switzerland. pierre.magistretti@unil.ch

The Journal of Experimental Biology
|May 30, 2006
PubMed
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Brain astrocytes fuel neurons via lactate shuttle, a process adapting with learning and sleep. This neurometabolic coupling is key to understanding brain energy use and plasticity.

Area of Science:

  • Neuroscience
  • Cellular Biology
  • Metabolic Physiology

Background:

  • Neurometabolic coupling links brain activity and glucose use, foundational for functional imaging like PET.
  • Astrocytes are central to this coupling, mediating glutamate uptake and aerobic glycolysis.
  • The astrocyte-neuron lactate shuttle model explains lactate release from astrocytes to fuel neurons.

Purpose of the Study:

  • To elucidate the role of astrocytes in neurometabolic coupling and its link to brain function.
  • To explore the concept of metabolic plasticity in neuron-glia interactions.
  • To provide a cellular and molecular basis for interpreting functional brain imaging data.

Main Methods:

  • Review of experimental evidence supporting the astrocyte-neuron lactate shuttle model.

Related Experiment Videos

  • Analysis of studies on hippocampal metabolic activity during spatial learning.
  • Examination of gene expression changes in glial metabolism during the sleep-wake cycle.

    • Main Results:

    • The astrocyte-neuron lactate shuttle model is experimentally supported, offering a framework for PET imaging data.
    • Metabolic activity in hippocampal subregions varies with spatial learning, indicating metabolic plasticity.
    • Glial glycogen metabolism genes, like PTG, show altered expression during sleep-wake cycles, especially after sleep deprivation.

    Conclusions:

    • Astrocytes play a critical role in brain energy supply through the lactate shuttle mechanism.
    • Neuron-glia metabolic coupling exhibits plasticity, paralleling synaptic plasticity during learning.
    • Glial metabolic plasticity is likely synchronized with synaptic plasticity, impacting brain function and adaptation.