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Moisture-cured silicone-urethanes-candidate materials for tissue engineering: a biocompatibility study in vitro.
P Mrówka1, J Kozakiewicz, A Jurkowska
1Department of Biophysics and Human Physiology, Medical University of Warsaw, 02-004 Warsaw, Poland.
Journal of Biomedical Materials Research. Part A
|January 22, 2010
Summary
Researchers tested human bone-derived cells
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Cell Biology
Background:
- Nondegradable elastomers like moisture-cured silicone-urethanes (mcSUUs) are potential scaffolds for bone tissue engineering.
- Their properties, including mechanical stability and oxygen supply, warrant investigation for cell compatibility.
Purpose of the Study:
- To evaluate the in vitro response of human bone-derived cells (HBDCs) to various mcSUUs.
- To identify optimal mcSUU formulations for bone tissue engineering applications.
Main Methods:
- Synthesized mcSUUs using different prepolymers, diisocyanates (MDI, IPDI), NCO/OH ratios, and catalysts (DBTL, N-met).
- Assessed HBDC viability, proliferation, alkaline phosphatase (ALP) activity, and collagen production after 7 and 21 days of culture.
- Evaluated cell response on porous scaffolds made from the best-performing mcSUU.
Main Results:
- mcSUUs synthesized with DBTL catalyst were cytotoxic.
- MDI-based mcSUUs supported HBDC growth and function better than IPDI-based ones.
- An MDI-based mcSUU with a low NCO/OH ratio and short siloxane chain length showed superior cell support, comparable to polystyrene.
Conclusions:
- Material composition significantly impacts HBDC response.
- Specific MDI-based mcSUUs demonstrate excellent biocompatibility for bone tissue engineering.
- Porous scaffolds from optimized mcSUUs can support the development of tissue-like structures.
