Extracts obtained from predegenerated nerves improve functional recovery after sciatic nerve transection.

Area of Science:

• Neuroscience
• Regenerative Medicine
• Biomaterials

Background:

• Peripheral nerve injuries often result in gaps, hindering natural regeneration due to the absence of the distal nerve stump.
• Standard nerve grafting requires sacrificing a healthy nerve, prompting research into alternative regenerative strategies.

Purpose of the Study:

• To investigate the efficacy of autologous connective-tissue chambers filled with fibrin and neuroactive substances for bridging 10-mm sciatic nerve gaps in rats.

Main Methods:

• Rats' sciatic nerves had 10-mm gaps bridged with autologous connective-tissue chambers.
• Chambers were filled with fibrin alone, or fibrin combined with brain-derived neurotrophic factor (BDNF), predegenerated nerve extracts, or non-predegenerated nerve extracts.
• Nerve regeneration was assessed functionally (sciatic functional index, muscle weight) and histologically (nerve fiber count) after 16 weeks.

Main Results:

• Chambers containing fibrin with predegenerated nerve extracts or BDNF significantly improved functional and histological recovery compared to fibrin alone.
• Fibrin combined with non-predegenerated nerve extracts showed limited regenerative support.

Conclusions:

• Autologous connective-tissue chambers filled with fibrin and either BDNF or predegenerated nerve extracts represent a promising therapeutic approach for peripheral nerve gap injuries.
• These findings suggest potential clinical applications for treating nerve defects.