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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...
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Related Experiment Video

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Minimally-invasive Technique for Injection into Rat Optic Nerve
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Optic nerve regeneration: A long view.

Yuqin Yin1,2,3,4, Silmara De Lima1,2,3,4, Hui-Ya Gilbert1,2

  • 1Laboratories for Neuroscience Research in Neurosurgery, Boston Children's Hospital, Boston, MA, USA.

Restorative Neurology and Neuroscience
|October 15, 2019
PubMed
Summary
This summary is machine-generated.

Researchers have discovered methods to promote optic nerve regeneration after injury. This breakthrough offers hope for restoring vision in individuals with optic nerve damage.

Keywords:
Optic nerveaxon regenerationbrain re-innervationinflammatory cellsoncomodulinretinasurvivalvisionzinc chelation

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Partial Optic Nerve Transection in Rats: A Model Established with a New Operative Approach to Assess Secondary Degeneration of Retinal Ganglion Cells
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Area of Science:

  • Neuroscience
  • Ophthalmology
  • Regenerative Medicine

Background:

  • The optic nerve transmits visual information from the retina to the brain.
  • Optic nerve injury, from trauma or disease, was historically considered irreversible, leading to vision loss.
  • Previous research focused on identifying factors inhibiting optic nerve axon regeneration and retinal ganglion cell survival.

Purpose of the Study:

  • To investigate methods for enabling optic nerve regeneration following injury.
  • To explore the role of specific molecular and cellular mechanisms in promoting axon regrowth.

Main Methods:

  • Investigated inflammation-derived growth factors.
  • Examined the suppression of inter-cellular signals within the retina.
  • Employed combinatorial therapies to enhance regeneration.

Main Results:

  • Identified key factors that normally suppress optic nerve axon regeneration.
  • Demonstrated successful regeneration of damaged retinal axons in animal models with optic nerve injury.
  • Showcased the ability of retinal ganglion cells to survive optic nerve injury under specific conditions.

Conclusions:

  • Optic nerve regeneration is achievable through targeted interventions.
  • Understanding inhibitory factors and employing combinatorial therapies can restore damaged retinal axons.
  • These findings present a potential pathway for restoring vision in patients with optic nerve damage.