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Recombinant Collagen I Peptide Microcarriers for Cell Expansion and Their Potential Use As Cell Delivery System in a Bioreactor Model
Published on: February 7, 2018
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A CMP-based method for tunable, cell-mediated gene delivery from collagen scaffolds
M A Urello1, K L Kiick, M O Sullivan
1The Department of Chemical and Biomolecular Engineering, The University of Delaware, 150 Academy St., Newark, DE 19716, USA. msulliva@udel.edu.
Journal of Materials Chemistry. B
|April 9, 2020
Summary
Researchers developed a novel biomimetic peptide technique to control DNA delivery from collagen biomaterials. This method enhances therapeutic retention and release, offering tuneable gene delivery systems for regenerative medicine.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Gene Therapy
Background:
- Collagen biomaterials are increasingly used in regenerative medicine due to their favorable properties for therapeutic delivery.
- Existing collagen modification techniques often involve harsh chemical treatments that can compromise collagen's natural characteristics.
- There is a need for advanced methods to control therapeutic retention and release from collagen scaffolds.
Purpose of the Study:
- To develop a biomimetic peptide-based strategy for controlled DNA polyplex delivery from collagen structures.
- To investigate the impact of collagen-mimetic peptides (CMPs) on DNA polyplex retention and release kinetics.
- To evaluate the therapeutic efficacy and release mechanisms of CMP-modified DNA polyplexes within collagen matrices.
Main Methods:
- Developed collagen-mimetic peptides (CMPs) for modification of DNA polyplexes.
- Incorporated CMP-modified polyplexes into 2-D collagen films and 3-D collagen gels.
- Varied CMP concentrations to modulate polyplex retention and release.
- Conducted transfection studies in the presence of serum and analyzed cell response to matrix metalloproteinase (MMP) stimulation.
Main Results:
- CMP modification significantly enhanced DNA polyplex retention in collagen, extending from 2 days to 20 days.
- Tuneable release profiles were achieved by adjusting CMP concentration, with retention up to 2 weeks on films and 1 month on gels.
- Transfection activity was maintained for at least 2 weeks in collagen gels, with significant gene expression observed in MMP-stimulated cells, indicating a role for cell mobility and collagen remodeling.
Conclusions:
- A novel biomimetic peptide approach enables controlled DNA polyplex retention and release from collagen biomaterials.
- This technique offers a tuneable platform for developing advanced collagen-based gene delivery systems.
- The findings highlight the potential of CMP-modified polyplexes for applications in regenerative medicine and targeted gene therapy.
