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Proangiogenic Peptide Nanofiber Hydrogels for Wound Healing
Bin Chu1,2, Jin-Mei He2, Lan-Lan Liu2
1Department of Biomedical Engineering, College of Chemistry and Materials Science, Jinan University, Guangzhou 510632, P. R. China.
ACS Biomaterials Science & Engineering
|January 29, 2021
Summary
New peptide hydrogels promote blood vessel growth for enhanced skin regeneration. These self-assembling materials support cell growth and accelerate wound healing, offering a promising therapeutic option for dermal repair.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Tissue Engineering
Background:
- Rapid vascularization is crucial for effective dermal regeneration, nutrient exchange, waste removal, and infection prevention.
- Existing methods for skin regeneration often face challenges in achieving adequate vascularization.
- Proangiogenic factors are essential for stimulating the formation of new blood vessels.
Purpose of the Study:
- To design and synthesize self-assembling proangiogenic peptides for enhanced skin regeneration.
- To investigate the self-assembly behavior and structural characteristics of the designed peptide hydrogels.
- To evaluate the *in vitro* and *in vivo* efficacy of these peptide hydrogels in promoting angiogenesis and skin repair.
Main Methods:
- Synthesis of proangiogenic peptides incorporating an angiogenic segment (GEETEVTVEGLEPG) and a β-sheet structural sequence.
- Characterization of peptide hydrogel formation using scanning electron microscopy (SEM) and transmission electron microscopy (TEM).
- Assessment of *in vitro* cell adhesion and proliferation using mouse fibroblasts (L929) and human umbilical vein endothelial cells (HUVECs).
- *In vivo* evaluation of vascularization and skin defect healing following subcutaneous implantation in mice.
Main Results:
- Peptides self-assembled into pH-dependent hydrogels with 3D fibril networks and nanofibers.
- Peptide hydrogels supported fibroblast and endothelial cell adhesion and proliferation.
- Significant tube formation observed in HUVECs cultured on hydrogels within 8 hours.
- *In vivo* studies showed robust neovascularization within the hydrogels within 2 weeks.
- Proangiogenic hydrogels accelerated skin defect repair and improved healing outcomes.
Conclusions:
- The developed proangiogenic peptide hydrogels effectively promote angiogenesis.
- These hydrogels provide a supportive microenvironment for cell growth and vascularization.
- The findings suggest that proangiogenic peptide hydrogels are a promising therapeutic strategy for skin regeneration and wound healing.
