Chitosan-Based Dressing as a Sustained Delivery System for Bioactive Cytokines

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Wound Healing Research

Background:

• Wound healing requires advanced methodologies, focusing on bioactive dressings for controlled microenvironment regulation.
• Cytokines are crucial for wound healing but degrade rapidly without protection.

Purpose of the Study:

• To develop and characterize chitosan-based wound dressings incorporating G-CSF or GM-CSF.
• To evaluate the impact of preparation and storage methods on cytokine recovery and bioactivity.

Main Methods:

• Fabrication of Ligasano and chitosan-TPP composite dressings.
• Incorporation of G-CSF and GM-CSF into dressings.
• Assessment of cytokine recovery and bioactivity after various preparation (drying, freeze-drying) and storage conditions.

Main Results:

• Developed non-cytotoxic dressings with sustained cytokine release.
• Drying methods reduced cytokine levels and bioactivity, particularly for G-CSF.
• Freeze-drying followed by storage at 24 °C minimized cytokine loss for both G-CSF and GM-CSF.

Conclusions:

• Freeze-drying is an effective method for preserving G-CSF and GM-CSF bioactivity in wound dressings.
• This approach enhances the clinical availability of cytokine-enriched dressings for improved wound healing.