Skin-derived stem cells transplanted into resorbable guides provide functional nerve regeneration after sciatic nerve...

Area of Science:

• Neuroscience
• Regenerative Medicine
• Biomaterials Science

Background:

• Peripheral nerve injury often results in incomplete regeneration, necessitating strategies to restore nerve continuity.
• Nerve grafts are a common treatment, but alternatives like cell-filled guide tubes are being explored.

Purpose of the Study:

• To evaluate the efficacy of skin-derived stem cells (SDSCs) in promoting peripheral nerve regeneration within nerve guides.
• To compare the performance of synthetic (PLA-TMC) and collagen-based nerve guides seeded with SDSCs.

Main Methods:

• Autologous transplantation of GFP-labeled SDSCs into 16 mm sciatic nerve gaps in adult rats.
• Comparison of regeneration in synthetic (PLA-TMC) and collagen guides versus control (PBS-filled) guides.
• Assessment of sciatic nerve function, compound muscle action potential, and histological/immunohistochemical analysis.

Main Results:

• SDSC transplantation significantly enhanced sciatic function index and muscle action potential recovery compared to controls.
• The collagen guide seeded with SDSCs demonstrated superior regeneration outcomes.
• Histological analysis revealed increased myelinated axons (S100, Neurofilament 70) and presence of SDSCs expressing glial markers.

Conclusions:

• Skin-derived stem cells show promise as a cell therapy for peripheral nerve regeneration.
• Collagen-based nerve guides combined with SDSCs offer a potentially effective strategy for treating severe nerve lesions.