Limitations to clinically restoring meaningful peripheral nerve function across gaps and overcoming them

Area of Science:

• Neuroscience
• Regenerative Medicine
• Biomaterials

Background:

• Restoring peripheral nerve function after injury is clinically limited, with autografts achieving <50% meaningful recovery.
• Significant intrinsic and extrinsic changes in neurons and Schwann cells impede axon regeneration and functional outcomes.
• Many patients with peripheral nerve gaps do not receive surgical repair, leading to permanent functional loss.

Purpose of the Study:

• To review intrinsic and extrinsic factors affecting axon regeneration and recovery after nerve injury.
• To evaluate the efficacy of platelet-rich plasma (PRP) in promoting nerve regeneration.
• To explore novel PRP-based techniques for bridging nerve gaps and enhancing functional recovery.

Main Methods:

• Review of literature on cellular changes in injured peripheral nerves.
• Analysis of studies investigating platelet-rich plasma (PRP) for nerve repair.
• Examination of innovative methods using PRP-collagen conduits for nerve gap bridging.

Main Results:

• Intrinsic and extrinsic changes in injured neurons and Schwann cells can be reversed to enhance regeneration.
• Platelet-rich plasma (PRP) demonstrates efficacy in promoting axon regeneration.
• Novel techniques using PRP-collagen tubes show meaningful recovery where autografts alone fail.

Conclusions:

• Despite limitations in peripheral nerve repair, strategies exist to improve outcomes.
• Platelet-rich plasma (PRP) offers a promising approach to enhance axon regeneration and functional recovery.
• PRP-based therapies represent the most effective current strategy for overcoming challenges in peripheral nerve repair.