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Related Experiment Video

Updated: Jun 22, 2026

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Integrating polyurethane culture substrates into poly(dimethylsiloxane) microdevices.

Christopher Moraes1, Yoan K Kagoma, Bogdan M Beca

  • 1Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Road, Toronto, Ontario M5S 3G8, Canada.

Biomaterials
|June 24, 2009
PubMed
Summary

Researchers integrated polyurethane (PU) into microdevices for long-term cell culture. This hybrid approach improves cell adhesion and spreading on alternative biomaterials compared to standard poly(dimethylsiloxane) (PDMS) microdevices.

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Area of Science:

  • Biomaterials Science
  • Cell Biology
  • Microfluidics

Background:

  • Poly(dimethylsiloxane) (PDMS) microdevices facilitate cellular response studies under controlled microenvironments.
  • PDMS limitations include restricted long-term culture and potential cell response alterations.

Purpose of the Study:

  • To develop a method for integrating polyurethane (PU) into PDMS microfabrication for enhanced long-term cell culture.
  • To evaluate cell adhesion, spreading, and protein pattern maintenance on PU versus PDMS substrates in microdevices.

Main Methods:

  • Hybrid microdevices were fabricated by integrating PU into the PDMS multilayer microfabrication process.
  • Compared initial cell adhesion, cell spreading, and protein pattern stability on PU and PDMS substrates over time.
  • Assessed cell behavior on PU and PDMS with and without collagen coating, and on tissue culture-treated polystyrene.

Main Results:

  • Initial cell adhesion and spreading at 3 days were similar on collagen-coated PDMS and PU, but lower on native PDMS.
  • Longer-term cultures (> or = 6 days) showed significantly better cell spreading and protein adhesion on PU compared to PDMS.
  • Cell behavior on PU substrates was comparable to tissue culture-treated polystyrene for extended culture durations.

Conclusions:

  • Integrating polyurethane (PU) into microdevices enables significantly longer-term cell culture than traditional PDMS substrates.
  • This hybrid fabrication technique allows the use of clinically relevant biomaterials in microdevices, expanding research applicability.
  • The method preserves the benefits of PDMS for microdevice fabrication while enabling the use of alternative substrates for improved cell culture outcomes.