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Behavior of primary bone cells on characterized polystyrene surfaces
B W Callen1, R N Sodhi, R M Shelton
1Centre for Biomaterials, University of Toronto, Ontario, UK.
Journal of Biomedical Materials Research
|July 1, 1993
Summary
Surface treatments on polystyrene impact bone cell adhesion. Simple cell colonization assays may not detect subtle surface chemistry differences, necessitating more sensitive biomaterial testing methods.
Area of Science:
- Biomaterials Science
- Cell Biology
- Surface Chemistry
Background:
- Polystyrene is a common biomaterial.
- Surface modifications can alter cell interactions.
- Understanding these interactions is crucial for biomaterial development.
Purpose of the Study:
- To investigate the effect of surface treatments on polystyrene for bone cell colonization.
- To compare the efficacy of sulfuric acid treatment and gamma irradiation on polystyrene surfaces.
- To evaluate the sensitivity of cell colonization assays in detecting surface chemistry changes.
Main Methods:
- Primary bone cells were isolated from rat calvariae.
- Cells were cultured on polystyrene surfaces treated with sulfuric acid or gamma irradiation.
- Surface analysis was performed using X-ray photoelectron spectroscopy (XPS).
- Cell colonization was assessed as a measure of cell adhesion.
Main Results:
- Surface treatments enhanced bone cell colonization compared to untreated polystyrene.
- XPS confirmed different chemical groups were introduced by treatments.
- Cell adhesion showed a dose-dependent relationship with gamma irradiation.
- Simple cell colonization assays could not distinguish subtle surface chemistry differences.
Conclusions:
- Surface chemistry significantly influences bone cell adhesion on polystyrene.
- Sensitive biologic assays are needed to correlate functional cell responses with surface chemistry.
- Biomaterial testing must consider the impact of cell isolation procedures on adhesion behavior.