NPS-Crosslinked Fibrin Gels Load with EMSCs to Repair Peripheral Nerve Injury in Rats.

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Neuroscience

Background:

• Traumatic sciatic nerve injuries pose significant challenges for nerve regeneration.
• Current therapeutic strategies often have limitations in promoting complete functional recovery.
• Neural tissue engineering offers a promising approach for repairing nerve defects.

Purpose of the Study:

• To develop and evaluate a novel neuropeptide S (NPS)-crosslinked fibrin scaffold (NPS@Fg) system loaded with ectomesenchymal stem cells (EMSCs).
• To assess the in vitro differentiation of EMSCs on NPS@Fg scaffolds towards a neural lineage.
• To investigate the in vivo efficacy of the NPS@Fg+EMSCs construct in bridging a rat sciatic nerve defect.

Main Methods:

• Fabrication of NPS-crosslinked fibrin scaffolds (NPS@Fg).
• In vitro assessment of EMSC differentiation on NPS@Fg scaffolds.
• Surgical transplantation of NPS@Fg+EMSCs into an 8-mm rat sciatic nerve defect model.
• In vivo evaluation of nerve regeneration and functional recovery up to 12 weeks post-transplantation.

Main Results:

• NPS@Fg scaffolds successfully promoted the differentiation of EMSCs into neuronal lineage cells in vitro.
• Transplantation of NPS@Fg+EMSCs significantly accelerated nerve healing compared to controls.
• Improved morphological repair and functional recovery were observed in the sciatic nerve defect model.

Conclusions:

• The NPS@Fg+EMSCs system represents a viable strategy for peripheral nerve reconstruction.
• This combined approach shows potential for enhancing therapeutic outcomes in traumatic nerve injuries.
• Further research into this neural tissue engineering strategy could lead to new treatments for nerve defects.