Development of a graphene oxide-incorporated polydimethylsiloxane membrane with hexagonal micropillars

Yi Ying Lin, Yueh Chien, Jen Hua Chuang, Chia-Ching Chang, Yi Ping Yang, Ying Hsiu Lai, Wen Liang Lo, Ke Hung Chien, Teh Ia Huo, Chien Ying Wang*

*Corresponding author for this work

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

Several efforts have been made on the development of bioscaffolds including the polydimethylsiloxane (PDMS) elastomer for supporting cell growth into stable sheets. However, PDMS has several disadvantages, such as intrinsic surface hydrophobicity and mechanical strength. Herein, we generated a novel PDMS-based biomimetic membrane by sequential modifications of the PMDS elastomer with graphene oxide (GO) and addition of a hexagonal micropillar structure at the bottom of the biomembrane. GO was initially homogenously mixed with pure PDMS and then was further coated onto the upper surface of the resultant PDMS. The elastic modulus and hydrophilicity were significantly improved by such modifications. In addition, the development of hexagonal micropillars with smaller diameters largely improved the ion permeability and increased the motion resistance. We further cultured retinal pigment epithelial (RPE) cells on the surface of this modified PDMS biomembrane and assayed its biocompatibility. Remarkably, the GO incorporation and coating exhibited beneficial effect on the cell growth and the new formation of tight junctions in RPE cells. Taken together, this GO-modified PDMS scaffold with polyhexagonal micropillars may be utilized as an ideal cell sheet and adaptor for cell cultivation and can be used in vivo for the transplantation of cells such as RPE cells.

Original languageEnglish
Article number2517
JournalInternational journal of molecular sciences
Volume19
Issue number9
DOIs
StatePublished - 1 Sep 2018

Keywords

  • Graphene oxide
  • Micropillar
  • Polydimethylsiloxane
  • Retinal pigment epithelial cells

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