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Surgical Methods in Postmetamorphic Xenopus laevis: Optic Nerve Crush Injury Model.

Alexis M Feidler1, Hieu H M Nguyen1, Fiona L Watson2

  • 1Department of Biology & Program in Neuroscience, Washington and Lee University, Virginia, USA.

Methods in Molecular Biology (Clifton, N.J.)
|March 7, 2023
PubMed
Summary

This study details two surgical methods for optic nerve crush (ONC) injuries in Xenopus laevis frogs. This model aids research into central nervous system (CNS) regeneration, particularly for retinal ganglion cells (RGCs).

Keywords:
CNS regeneration injury modelGlaucomaOptic nerve crushOptic nerve injury modelRegenerationRetinal ganglion cells

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Area of Science:

  • Neuroscience
  • Regenerative Medicine
  • Ophthalmology

Background:

  • Optic neuropathies cause vision loss by damaging retinal ganglion cells (RGCs), the sole neural link between the eye and brain.
  • Optic nerve crush (ONC) injuries model traumatic and progressive neuropathies like glaucoma.
  • Mammals cannot regenerate damaged central nervous system (CNS) neurons, unlike amphibians.

Purpose of the Study:

  • To describe two surgical methods for inducing ONC injuries in Xenopus laevis.
  • To highlight the advantages and disadvantages of each surgical method.
  • To discuss Xenopus laevis as a model organism for studying CNS regeneration.

Main Methods:

  • Surgical induction of optic nerve crush (ONC) injuries in postmetamorphic Xenopus laevis.
  • Detailed description of two distinct surgical techniques.
  • Comparative analysis of the surgical methods' efficacy and drawbacks.

Main Results:

  • Successful establishment of ONC injury models in Xenopus laevis.
  • Demonstration of Xenopus laevis' capacity for RGC regeneration post-injury.
  • Identification of specific advantages and disadvantages for each surgical approach.

Conclusions:

  • Xenopus laevis is a valuable model for studying CNS regeneration due to its innate regenerative capabilities.
  • The described surgical methods provide reproducible approaches for investigating optic nerve injury and repair.
  • Understanding RGC regeneration in amphibians can inform strategies for treating human optic neuropathies.