Alginate/chitosan hydrogel containing olfactory ectomesenchymal stem cells for sciatic nerve tissue engineering

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Neuroscience

Background:

• Peripheral nerve damage presents significant challenges for functional recovery.
• Effective strategies for promoting nerve regeneration are clinically needed.

Purpose of the Study:

• To evaluate the efficacy of alginate/chitosan hydrogel loaded with olfactory ectomesenchymal stem cells (OE-MSCs) for peripheral nerve regeneration.
• To assess the biocompatibility and cell-supporting properties of the hydrogel scaffold.

Main Methods:

• Isolation and characterization of OE-MSCs.
• Preparation and characterization of alginate/chitosan hydrogel (porosity, swelling, degradation, blood compatibility).
• In vitro assessment of OE-MSC behavior on the hydrogel (MTT, DAPI, LIVE/DEAD staining).
• In vivo study using a rat sciatic nerve defect model, evaluating functional recovery (sciatic functional index, hot plate latency, electrophysiology) and histology.

Main Results:

• The alginate/chitosan hydrogel exhibited favorable properties, including high porosity, appropriate swelling, controlled degradation, and good blood compatibility.
• In vitro studies confirmed the hydrogel supports OE-MSC survival and provides a suitable substrate.
• In vivo results demonstrated that the combination of alginate/chitosan hydrogel and OE-MSCs significantly improved sciatic nerve regeneration and functional recovery compared to controls.

Conclusions:

• Alginate/chitosan hydrogel serves as a promising scaffold for OE-MSC transplantation.
• This combined approach effectively promotes peripheral nerve regeneration and functional recovery in a rat model.
• The study highlights a potential therapeutic strategy for treating peripheral nerve injuries.