Low-frequency electroacupncture improves locomotor function after sciatic crushed nerve injury in rats

Area of Science:

• Neuroscience
• Regenerative Medicine
• Pain Management

Background:

• Sciatic crushed nerve injury (SCI) leads to pain and impaired limb function.
• Electroacupuncture (EA) is a technique with documented analgesic effects.
• Assessing functional recovery after nerve injury is crucial for treatment evaluation.

Purpose of the Study:

• To investigate the efficacy of low-frequency EA on functional recovery following SCI in rats.
• To analyze the molecular mechanisms underlying EA's effects on nerve regeneration and pain signaling.

Main Methods:

• Sciatic nerve crush injury was induced in rats.
• Low-frequency EA (100 Hz) was administered daily for 14 days.
• Functional recovery was assessed using the Scientific Functional Index (SFI); molecular changes were evaluated via immunohistochemistry and Western blot for c-Fos, neurofilament (NF), and brain-derived neurotrophic factor (BDNF).

Main Results:

• EA significantly increased SFI values, indicating improved functional recovery.
• EA suppressed SCI-induced increases in c-Fos expression in the vlPAG and PVN.
• EA treatment upregulated NF expression and downregulated BDNF expression in the sciatic nerve.

Conclusions:

• Low-frequency EA demonstrates effectiveness in promoting functional recovery after sciatic nerve crush injury.
• EA may exert its therapeutic effects by modulating central pain pathways and influencing peripheral nerve regeneration markers.