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Optically transparent recombinant silk-elastinlike protein polymer films.

Weibing Teng1, Yiding Huang, Joseph Cappello

  • 1Department of Aerospace and Mechanical Engineering, University of Arizona, Tucson, Arizona 85721, USA.

The Journal of Physical Chemistry. B
|February 4, 2011
PubMed
Summary

Genetically engineered silk-elastinlike protein polymer (SELP-47K) films exhibit remarkable optical transparency and excellent cytocompatibility. These properties suggest potential for novel biomedical applications in drug delivery and tissue engineering.

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Area of Science:

  • Biomaterials Science
  • Polymer Chemistry
  • Biomedical Engineering

Background:

  • Recombinant protein polymers are crucial biomaterials for drug delivery and tissue engineering.
  • Optical transparency is a rarely reported characteristic for these protein-based biomaterials.

Purpose of the Study:

  • To evaluate the optical transparency and cytocompatibility of a genetically engineered silk-elastinlike protein polymer (SELP-47K).
  • To investigate the effects of cross-linking methods on the properties of SELP-47K films.

Main Methods:

  • Fabrication of SELP-47K films.
  • Measurement of optical transmittance across a defined wavelength range (350-800 nm).
  • Assessment of secondary structure and water content post-cross-linking.
  • In vitro cell viability and proliferation assays.

Main Results:

  • SELP-47K films (100 microm thickness) demonstrated high transmittance (93% at 350-800 nm).
  • Noncovalent cross-linking (methanol) slightly increased transmittance to 95%, while covalent cross-linking (glutaraldehyde) decreased it to 77% at 800 nm.
  • Both cross-linking methods influenced secondary structure and water content, while maintaining excellent cytocompatibility.

Conclusions:

  • SELP-47K films possess significant optical transparency and cytocompatibility.
  • The tunable properties through cross-linking offer versatility.
  • These findings suggest SELP-47K as a promising candidate for advanced biomedical applications requiring optical clarity and biocompatibility.