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Isolation and Enrichment of Human Adipose-derived Stromal Cells for Enhanced Osteogenesis
Published on: January 12, 2015
Increased osteoblast adhesion on physically optimized KRSR modified calcium aluminate.
Rachelle N Palchesko1, Jared D Romeo, Kenneth A McGowan
1Department of Chemistry and Biochemistry, Duquesne University, Pittsburgh, Pennsylvania 15282, USA.
Journal of Biomedical Materials Research. Part A
|February 25, 2012
Summary
Calcium aluminate (CA) scaffolds with optimal 100-micron pores enhance cell viability. Immobilizing KRSR peptides on CA surfaces improved osteoblast adhesion, potentially aiding bone formation.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Cell Biology
Background:
- Calcium aluminate (CA) is a biocompatible, room-temperature castable material with tunable pore sizes.
- Optimizing pore size is crucial for cell viability and material performance in biomedical applications.
- Surface modification can enhance cell adhesion and integration of biomaterials.
Purpose of the Study:
- To determine the optimal surface pore size of calcium aluminate for cell viability.
- To develop a method for covalently immobilizing cell adhesion peptides onto calcium aluminate surfaces.
- To evaluate the effect of immobilized peptides on osteoblast and fibroblast adhesion.
Main Methods:
- Calcium aluminate casting to control average surface pore size (100-290 microns).
- Three-step solution deposition technique for covalent immobilization of RGD and KRSR peptides.
- Cell adhesion assays using primary osteoblasts and NIH 3T3 fibroblasts over 1, 4, and 7 days.
Main Results:
- Optimal surface pore size for hydrated calcium aluminate cell viability was identified as 100 microns.
- Both RGD and KRSR peptides increased fibroblast adhesion to the calcium aluminate surface.
- The KRSR peptide significantly enhanced osteoblast adhesion to the calcium aluminate surface.
Conclusions:
- A surface pore size of 100 microns is optimal for calcium aluminate's cell viability.
- Covalent immobilization of KRSR peptide enhances osteoblast adhesion on calcium aluminate.
- This surface modification strategy shows promise for improving bone formation applications.
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