Dental Pulp Stem Cell-Derived Exosomes Promote Sciatic Nerve Regeneration via Optimizing Schwann Cell Function

Area of Science:

• Biomedical Engineering
• Regenerative Medicine
• Neuroscience

Background:

• Peripheral nerve injury repair remains a clinical challenge despite recent advancements.
• Exosomes derived from dental pulp stem cells (DPSC-exos) show potential for nerve regeneration.

Purpose of the Study:

• To evaluate the efficacy of human DPSC-exos in promoting peripheral nerve regeneration.
• To investigate the therapeutic potential of DPSC-exos in a rat sciatic nerve injury model.

Main Methods:

• Co-culture of dental pulp stem cells (DPSCs) and Schwann cells (SCs) in vitro.
• Extraction, labeling, and uptake experiments of human DPSC-exos in dorsal root ganglion neurons (DRGs) and SCs.
• Establishment of a rat sciatic nerve injury model for in vivo evaluation.

Main Results:

• DPSC-exos promoted neurite elongation by enhancing SC proliferation, migration, and neurotrophic factor secretion.
• In vivo administration of DPSC-exos improved walking behavior, axon regeneration, and myelination in injured rats.

Conclusions:

• Human DPSC-exos significantly enhance peripheral nerve regeneration and functional recovery.
• DPSC-exos represent a promising therapeutic tool for tissue-engineered nerve repair.