Millions of adults suffer peripheral nerve injuries from accidents, surgical complications, or degenerative conditions, yet even successful surgical repair often leaves patients with incomplete recovery of sensation and motor function. The glacial pace of nerve regrowth—roughly one millimeter per day—means recovery can take months or years, with many never regaining full function.
This comprehensive review evaluates six therapeutic strategies that could accelerate healing beyond what surgery alone achieves. Electrical stimulation appears to enhance axonal sprouting through targeted neural activation. Erythropoietin, traditionally known for red blood cell production, demonstrates neuroprotective effects by reducing inflammation and promoting Schwann cell proliferation. Tacrolimus, an immunosuppressant, shows promise in enhancing nerve conduction velocity. Methylcobalamin, a bioactive form of vitamin B12, supports myelin synthesis and axonal regeneration. Gene therapy approaches target specific growth factors, while stem cell interventions provide both structural support and paracrine signaling.
The clinical translation gap remains substantial. Most evidence derives from animal models using standardized injury protocols that poorly reflect the complex, contaminated wounds typical in human trauma. Dosing, timing, and delivery methods that work in laboratory settings may prove ineffective or impractical in real-world clinical scenarios. The review notably prioritizes clinical utility over biological plausibility—a refreshing departure from purely mechanistic discussions that dominate much regenerative medicine literature. For the estimated 200,000 Americans annually suffering significant peripheral nerve injuries, these approaches represent potential bridges between current surgical limitations and future therapeutic breakthroughs, though rigorous human trials remain essential.