[Transplanted epidermal neural crest stem cell in a peripheral nerve gap].

Area of Science:

• Regenerative Medicine
• Biomaterials Science
• Neuroscience

Background:

• Hair follicle-derived epidermal neural crest stem cells (EPI-NCSC) are easily accessible and possess multipotent differentiation capabilities, making them ideal for tissue engineering applications.
• EPI-NCSC are being explored for nerve injury repair, particularly spinal cord injuries, with potential for peripheral nerve regeneration.

Purpose of the Study:

• To evaluate the efficacy of EPI-NCSC in repairing peripheral nerve injuries.
• To assess the biocompatibility of poly lactic acid coglycolic acid copolymer (PLGA) membranes for culturing EPI-NCSC.
• To investigate the regenerative potential of EPI-NCSC delivered via a PLGA conduit for sciatic nerve repair.

Main Methods:

• Primary culture of GFP-labeled EPI-NCSC on coated dishes and PLGA membranes.
• Assessment of cell adhesion and proliferation using MTT assays.
• Analysis of cell cycle and DNA ploidy to evaluate proliferation.
• Transplantation of EPI-NCSC/extracellular matrix mixture within a PLGA conduit into a rat sciatic nerve defect model.

Main Results:

• EPI-NCSC exhibited high initial adhesion (89.7%) and sustained growth on PLGA membranes.
• Cell cycle and proliferation patterns of EPI-NCSC were consistent on both coated dishes and PLGA.
• Histological restoration and partial recovery of sensory function and sciatic nerve index were observed in rats treated with EPI-NCSC-filled PLGA conduits after four weeks.

Conclusions:

• PLGA membranes provide a suitable substrate for EPI-NCSC culture, supporting cell adhesion and proliferation.
• A PLGA conduit loaded with EPI-NCSC demonstrates significant therapeutic potential for peripheral nerve injury repair.
• This study highlights the promise of EPI-NCSC as a cell source for regenerating damaged peripheral nerves.