10.1186/2194-0517-2-14

Evaluation of silk sericin as a biomaterial: in vitro growth of human corneal limbal epithelial cells on Bombyx mori sericin membranes

  1. Queensland Eye Institute, South Brisbane, Queensland, 4101, AU Faculty of Science and Engineering, Queensland University of Technology, Brisbane, Queensland, 4001, AU Faculty of Health Sciences, The University of Queensland, Herston, Queensland, 4029, AU Australian Institute of Bioengineering & Nanotechnology, The University of Queensland, St Lucia, Queensland, 4072, AU Faculty of Science, The University of Western Australia, Crawley, Western Australia, 6009, AU
  2. Queensland Eye Institute, South Brisbane, Queensland, 4101, AU
  3. Queensland Eye Institute, South Brisbane, Queensland, 4101, AU Faculty of Health, Queensland University of Technology, Brisbane, Queensland, 4001, AU Max Bergmann Center of Biomaterials, Leibniz Institute for Polymer Research, Dresden, Saxony, 01069, DE
  4. Queensland Eye Institute, South Brisbane, Queensland, 4101, AU Faculty of Health, Queensland University of Technology, Brisbane, Queensland, 4001, AU UQ Centre for Clinical Research, The University of Queensland, Herston, Queensland, 4029, AU
  5. Queensland Eye Institute, South Brisbane, Queensland, 4101, AU Faculty of Health, Queensland University of Technology, Brisbane, Queensland, 4001, AU Institute of Health and Biomedical Innovation, Kelvin Grove, Queensland, 4059, AU
Cover Image

Published in Issue 2013-11-28

How to Cite

Chirila, T. V., Suzuki, S., Bray, L. J., Barnett, N. L., & Harkin, D. G. (2013). Evaluation of silk sericin as a biomaterial: in vitro growth of human corneal limbal epithelial cells on Bombyx mori sericin membranes. Progress in Biomaterials, 2(1 (December 2013). https://doi.org/10.1186/2194-0517-2-14

Abstract

Abstract Sericin and fibroin are the two major proteins in the silk fibre produced by the domesticated silkworm, Bombyx mori . Fibroin has been extensively investigated as a biomaterial. We have previously shown that fibroin can function successfully as a substratum for growing cells of the eye. Sericin has been so far neglected as a biomaterial because of suspected allergenic activity. However, this misconception has now been dispelled, and sericin’s biocompatibility is currently indisputable. Aiming at promoting sericin as a possible substratum for the growth of corneal cells in order to make tissue-engineered constructs for the restoration of the ocular surface, in this study we investigated the attachment and growth in vitro of human corneal limbal epithelial cells (HLECs) on sericin-based membranes. Sericin was isolated and regenerated from the silkworm cocoons by an aqueous procedure, manufactured into membranes, and characterized (mechanical properties, structural analysis, contact angles). Primary cell cultures from two donors were established in serum-supplemented media in the presence of murine feeder cells. Membranes made of sericin and fibroin-sericin blends were assessed in vitro as substrata for HLECs in a serum-free medium, in a cell attachment assay and in a 3-day cell growth experiment. While the mechanical characteristics of sericin were found to be inferior to those of fibroin, its ability to enhance the attachment of HLECs was significantly superior to fibroin, as revealed by the PicoGreen ® assay. Evidence was also obtained that cells can grow and differentiate on these substrata.

Keywords

  • Silk,
  • Silk proteins,
  • Sericin,
  • Corneal limbal epithelial cells,
  • Cell attachment

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