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Development and evaluation of RADA-PDGF2 self-assembling peptide hydrogel for enhanced skin wound healing
M Deptuła1, J Sawicka2, P Sass3
1Laboratory of Tissue Engineering and Regenerative Medicine, Division of Embryology, Medical University of Gdańsk, Gdańsk, Poland.
Frontiers in Pharmacology
|December 14, 2023
Summary
A novel self-assembling hydrogel, RADA-PDGF2, effectively promotes wound healing by releasing bioactive peptides. This innovative scaffold accelerates wound closure in mice without causing cytotoxicity or immune responses, offering a promising new treatment for complex wounds.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Wound Healing Research
Background:
- Complicated wound healing presents significant challenges due to limitations in current treatments.
- Platelet-derived growth factor (PDGF) derived peptides show promise for wound repair.
- Self-assembling peptides like RADA16-I can act as effective delivery systems for therapeutic agents.
Purpose of the Study:
- To design and evaluate a novel self-assembling hydrogel, RADA-PDGF2, for enhanced wound healing.
- To incorporate a neutrophil elastase-cleavable sequence for controlled release of PDGF2 peptide.
- To assess the physicochemical, biological, and in vivo wound healing properties of RADA-PDGF2.
Main Methods:
- Characterization of hydrogel self-assembly and physicochemical properties using microscopy and spectroscopy.
- Assessment of enzymatic cleavage and peptide stability in biological fluids via HPLC and MS.
- Evaluation of in vitro biological activity including cell proliferation, migration, and cytotoxicity.
- In vivo efficacy testing in a mouse dorsal skin injury model.
Main Results:
- RADA-PDGF2 self-assembles into a hydrogel and releases active PDGF2 upon elastase cleavage.
- The hydrogel demonstrated pro-proliferative and pro-migratory effects on skin cells.
- Accelerated wound closure was observed in mice treated with RADA-PDGF2 compared to controls.
- The material exhibited no cytotoxicity or immunogenicity in tested models.
Conclusions:
- RADA-PDGF2 hydrogel is a safe and effective system for delivering bioactive peptides for wound healing.
- The controlled release mechanism enhances therapeutic efficacy.
- This novel biomaterial holds significant potential as a therapeutic agent for managing complex wounds.
