Method for morphometric analysis of axons in experimental peripheral nerve reconstruction

Area of Science:

• Neuroscience
• Regenerative Medicine
• Biomedical Engineering

Background:

• Peripheral nerve injuries pose significant challenges in reconstructive surgery.
• Accurate assessment of axonal regeneration is crucial for evaluating treatment efficacy.
• Existing morphometric analysis methods can be time-consuming and lack comprehensive data registration.

Purpose of the Study:

• To present a new, automated method for morphometric analysis of axons in experimental peripheral nerve reconstruction.
• To establish a fast and reliable approach for comparing different nerve repair strategies.

Main Methods:

• Transection and epineurial repair of the saphenous nerve in rabbits, with a control group.
• Nerve harvesting at 3, 6, and 12 months post-surgery.
• Immunohistochemical staining (NF 90) and Sirius Red counterstaining of 6-micrometer transverse sections.
• Confocal laser scanning microscopy (CLSM) for digital image acquisition and automated axon quantification using the Optimas program.

Main Results:

• The developed method allows for complete and automatic registration of axons.
• Statistical evaluation of the total number of axons, mean axon diameter, and axon area percentage per fascicle area was performed.
• The method demonstrated efficiency in data acquisition and analysis.

Conclusions:

• The presented morphometric analysis method offers a fast and reliable way to evaluate axonal regeneration after peripheral nerve injury.
• This automated approach facilitates the comparison of various experimental nerve reconstruction techniques.
• The findings support the use of this method in future studies of peripheral nerve repair.