Collagen-derived peptide, DGEA, inhibits pro-inflammatory macrophages in biofunctional hydrogels
Aakanksha Jha1, Erika Moore1,2
1J. Crayton Pruitt Family Department of Biomedical Engineering, Herbert Wertheim College of Engineering, University of Florida, Gainesville, FL 32611 USA.
Abstract:
Macrophages are innate immune cells that play important roles in wound healing. Particularly, M1 macrophages are considered pro-inflammatory and promote initial phases of inflammation. Long-term exposure to inflammatory stimuli causes an increase in M1 macrophages, which contributes to chronic inflammation. Activated M1 macrophages have been shown to upregulate integrin α2β1 expression. To interfere with α2β1 binding, we designed a biofunctional hydrogel utilizing a collagen I-derived peptide, DGEA (Asp-Gly-Glu-Ala). We hypothesize that M1 macrophage activation can be reduced in the presence of DGEA. Effects of DGEA on M1 macrophages were studied via soluble delivery and immobilization within poly(ethylene glycol) (PEG) hydrogels. We demonstrate that M1 macrophage activation is reduced both via soluble delivery of DGEA in 2D and via immobilized DGEA in a 3D PEG-DGEA hydrogel. This novel biomaterial can manipulate inflammatory macrophage activation and can be applied to prevent chronic inflammatory conditions via macrophage manipulation.
Insights
This study shows that a collagen-derived peptide, DGEA, can reduce M1 macrophage activation. This biofunctional hydrogel material offers a new way to manage chronic inflammation by manipulating macrophage behavior.
Area of Science:
- Biomaterials Science
- Immunology
- Wound Healing
Background:
- Macrophages are key innate immune cells in wound healing.
- M1 macrophages are pro-inflammatory and contribute to chronic inflammation.
- Activated M1 macrophages upregulate integrin α2β1, promoting inflammation.
Purpose of the Study:
- To investigate the effect of DGEA peptide on M1 macrophage activation.
- To develop a biofunctional hydrogel for manipulating macrophage responses.
- To explore DGEA's potential in preventing chronic inflammatory conditions.
Main Methods:
- Designed a biofunctional hydrogel using a collagen I-derived peptide (DGEA).
- Studied DGEA effects via soluble delivery and immobilization in poly(ethylene glycol) (PEG) hydrogels.
- Assessed M1 macrophage activation in 2D and 3D hydrogel systems.
Main Results:
- DGEA significantly reduced M1 macrophage activation.
- Both soluble and immobilized DGEA demonstrated anti-inflammatory effects.
- A 3D PEG-DGEA hydrogel effectively modulated M1 macrophage activation.
Conclusions:
- DGEA peptide can successfully reduce pro-inflammatory M1 macrophage activation.
- Biofunctional hydrogels incorporating DGEA offer a novel strategy for controlling inflammation.
- This approach holds promise for preventing and treating chronic inflammatory diseases.
