Multifunctional Electrospun Nerve Conduits Enriched With Stem Cells and Bioactive Molecules for Sciatic Nerve...

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Neuroscience

Background:

• Peripheral nerve injuries disrupt neural connections, posing significant clinical challenges.
• Dexamethasone, retinoic acid, and umbilical cord blood stem cells show promise for nerve regeneration.
• Existing treatments for peripheral nerve injuries have limitations.

Purpose of the Study:

• To design and evaluate electrospun conduits for sciatic nerve repair.
• To incorporate dexamethasone, retinoic acid, carboxymethyl chitosan, and umbilical cord blood cells into PLCL, gelatin, and collagen conduits.
• To assess the biocompatibility, physical properties, and efficacy of the designed conduits in a mouse sciatic nerve injury model.

Main Methods:

• Fabrication of electrospun conduits using PLCL, gelatin, and collagen.
• Incorporation of dexamethasone, retinoic acid, carboxymethyl chitosan, and umbilical cord blood cells.
• Evaluation of conduit properties (chemical, physical, biocompatibility, cytotoxicity).
• In vivo implantation into a 10 mm mouse sciatic nerve defect and assessment of regeneration after 3 months.

Main Results:

• Dexamethasone inclusion enhanced conduit biocompatibility, wettability, degradation, tensile strength, and cell viability.
• Conduits seeded with umbilical cord blood cells demonstrated significant efficacy.
• Improved sensory and motor function, alongside increased nerve regeneration, were observed post-implantation.

Conclusions:

• The developed electrospun conduits show potential as a promising therapeutic tool for peripheral nerve injury repair.
• The combination of biomaterials and bioactive factors promotes nerve regeneration and functional recovery.
• Further investigation and clinical trials are warranted to validate these findings.