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Optic nerve injury models under varying forces.

Wu Sun1, Guojun Chao2, Mengqiu Shang1

  • 1Beijing University of Chinese Medicine, Beijing, China.

International Ophthalmology
|August 29, 2022
PubMed
Summary
This summary is machine-generated.

Varying forces in optic nerve injury models cause distinct pathological changes. Higher forces lead to greater retinal ganglion cell loss, impaired optic nerve function, and altered autophagy levels.

Keywords:
Flash visual evoked potentialLateral pulling optic nerve modelOptic nerve crush modelRetinal ganglion cellsVarying forces

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Area of Science:

  • Ophthalmology
  • Neuroscience
  • Pathology

Background:

  • Optic nerve injury models are crucial for understanding visual pathway damage.
  • Quantifying the impact of mechanical forces on optic nerve pathology is essential for developing effective treatments.

Purpose of the Study:

  • To investigate the pathological consequences of varying forces applied in optic nerve injury models.
  • To correlate mechanical force levels with retinal ganglion cell (RGC) survival, apoptosis, optic nerve function, and autophagy.

Main Methods:

  • Rats were subjected to optic nerve injury using a lateral pulling method with forces of 0.1, 0.3, and 0.5 N.
  • RGC number (Brn3a), apoptosis (TUNEL), optic nerve function (FVEP), and autophagy markers (LC3 II, P62) were assessed at various time points.

Main Results:

  • Increasing force correlated with decreased RGC counts and increased RGC apoptosis.
  • Optic nerve function, particularly P2 peak latency in FVEP, was significantly affected by higher forces.
  • Autophagy markers (LC3 II, P62) were elevated in response to higher forces (0.3, 0.5 N).

Conclusions:

  • The magnitude of force applied in optic nerve injury models significantly influences neuronal loss, functional deficits, and cellular stress responses like autophagy.
  • Precise force control is critical when establishing optic nerve injury models to ensure reproducible and interpretable results.