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Related Concept Videos

Neurogenesis and Regeneration of Nervous Tissue01:15

Neurogenesis and Regeneration of Nervous Tissue

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In the CNS, neurogenesis, the birth of new neurons from stem cells, is limited to the hippocampus in adults. In other regions of the brain and spinal cord, neurogenesis is almost non-existent due to inhibitory influences from neuroglia, especially oligodendrocytes, and the absence of growth-stimulating cues. The myelin produced by oligodendrocytes in the CNS inhibits neuronal regeneration. Furthermore, astrocytes proliferate rapidly after neuronal damage, forming scar tissue that physically...
732

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Related Experiment Video

Updated: Jun 9, 2025

Experimental Demyelination and Remyelination of Murine Spinal Cord by Focal Injection of Lysolecithin
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Remyelination protects neurons from DLK-mediated neurodegeneration.

Greg J Duncan1, Sam D Ingram2, Katie Emberley2

  • 1Department of Neurology, Jungers Center for Neurosciences Research, Oregon Health & Science University, Portland, OR, 97239, USA. duncangr@ohsu.edu.

Nature Communications
|October 24, 2024
PubMed
Summary
This summary is machine-generated.

Effective remyelination protects neurons from death in demyelinating diseases. Inhibiting dual leucine zipper kinase (DLK) prevents neuronal apoptosis and aids recovery, offering a potential therapeutic strategy.

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Area of Science:

  • Neuroscience
  • Cell Biology
  • Immunology

Background:

  • Chronic demyelination and oligodendrocyte loss impair neuronal function.
  • Neuron and connection degeneration drive progressive disability in demyelinating diseases.
  • The link between chronic demyelination and neurodegeneration is not fully understood.

Purpose of the Study:

  • To investigate if chronic demyelination triggers neurodegeneration.
  • To elucidate the mechanisms by which chronic demyelination may cause neurodegeneration.
  • To evaluate the neuroprotective role of remyelination.

Main Methods:

  • Characterization of two inducible genetic mouse models of demyelination: one with effective remyelination, one with remyelination failure.
  • Assessment of axonal damage, neuronal apoptosis, microglial inflammation, and functional recovery.
  • Analysis of kinase activation, including dual leucine zipper kinase (DLK), and c-Jun phosphorylation in neurons.

Main Results:

  • Both demyelinating models showed axonal damage.
  • Mice with failed remyelination exhibited increased neuronal apoptosis and altered microglial inflammation.
  • Efficient remyelination correlated with no neuronal apoptosis and improved functional recovery.
  • Remyelination-incapable mice displayed increased DLK pathway activation and c-Jun phosphorylation.
  • DLK inhibition or genetic disruption blocked c-Jun phosphorylation and neuronal apoptosis.

Conclusions:

  • Remyelination is associated with neuroprotection in demyelinating conditions.
  • The dual leucine zipper kinase (DLK) pathway is implicated in demyelination-induced neuronal apoptosis.
  • DLK inhibition represents a potential therapeutic strategy for protecting chronically demyelinated neurons.