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Branched peptide-amphiphiles as self-assembling coatings for tissue engineering scaffolds
Daniel A Harrington1, Earl Y Cheng, Mustafa O Guler
1Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, and Division of Pediatric Urology, Children's Memorial Hospital, Chicago 60614, USA.
Journal of Biomedical Materials Research. Part A
|April 19, 2006
Summary
Branched peptide-amphiphile (b-PA) nanofibers were developed as bioactive coatings for tissue engineering scaffolds. These b-PA coatings enhanced initial cell adhesion, showing promise for bladder tissue regeneration.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Tissue Engineering
Background:
- Designing bioactive scaffolds is crucial for regenerative medicine to mimic the extracellular matrix.
- Peptide-amphiphile (PA) molecules self-assemble into nanofibers displaying bioactive epitopes.
- Branched PAs (b-PAs) improve epitope availability on nanofiber surfaces.
Purpose of the Study:
- To apply b-PA systems as self-assembling coatings for poly(glycolic acid) scaffolds.
- To evaluate the ability of b-PA coatings to support cell adhesion for tissue regeneration.
Main Methods:
- Utilized branched peptide-amphiphiles (b-PAs) with RGDS epitopes for scaffold functionalization.
- Employed elemental analysis to confirm scaffold coating.
- Used spectroscopy to verify supramolecular organization and beta-sheet structures.
- Assessed primary human bladder smooth muscle cell adhesion to coated scaffolds.
Main Results:
- b-PA systems successfully and repeatably coated poly(glycolic acid) fiber scaffolds.
- Supramolecular organization of b-PA coatings was retained on the scaffolds.
- b-PA-functionalized scaffolds showed significantly greater initial cell adhesion compared to bare or linear PA-coated scaffolds.
Conclusions:
- Self-assembling b-PA coatings are effective for functionalizing tissue engineering scaffolds.
- This strategy enhances initial cell adhesion, a critical step in tissue regeneration.
- The developed b-PA coating technology holds potential for applications in bladder tissue regeneration.
