The Functional Response of Mesenchymal Stem Cells to Electron-Beam Patterned Elastomeric Surfaces Presenting Micrometer to Nanoscale Heterogeneous Rigidity

Manus J.P. Biggs, Marc Fernandez, Dilip Thomas, Ryan Cooper, Matteo Palma, Jinyu Liao, Teresa Fazio, Carl Dahlberg, Helen Wheadon, Anuradha Pallipurath, Abhay Pandit, Jeffrey Kysar, Shalom J. Wind

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Cells directly probe and respond to the physicomechanical properties of their extracellular environment, a dynamic process which has been shown to play a key role in regulating both cellular adhesive processes and differential cellular function. Recent studies indicate that stem cells show lineage-specific differentiation when cultured on substrates approximating the stiffness profiles of specific tissues. Although tissues are associated with a range of Young's modulus values for bulk rigidity, at the subcellular level, tissues are comprised of heterogeneous distributions of rigidity. Lithographic processes have been widely explored in cell biology for the generation of analytical substrates to probe cellular physicomechanical responses. In this work, it is shown for the first time that that direct-write e-beam exposure can significantly alter the rigidity of elastomeric poly(dimethylsiloxane) substrates and a new class of 2D elastomeric substrates with controlled patterned rigidity ranging from the micrometer to the nanoscale is described. The mechanoresponse of human mesenchymal stem cells to e-beam patterned substrates was subsequently probed in vitro and significant modulation of focal adhesion formation and osteochondral lineage commitment was observed as a function of both feature diameter and rigidity, establishing the groundwork for a new generation of biomimetic material interfaces.

Original languageEnglish
Article number1702119
Number of pages13
JournalAdvanced Materials
Volume29
Issue number39
Early online date1 Sep 2017
DOIs
Publication statusPublished - 18 Oct 2017

Keywords

  • electron beam
  • focal adhesions
  • mechanotransduction
  • polydimethylsiloxane
  • rigidity
  • stem cells

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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  • Cite this

    Biggs, M. J. P., Fernandez, M., Thomas, D., Cooper, R., Palma, M., Liao, J., Fazio, T., Dahlberg, C., Wheadon, H., Pallipurath, A., Pandit, A., Kysar, J., & Wind, S. J. (2017). The Functional Response of Mesenchymal Stem Cells to Electron-Beam Patterned Elastomeric Surfaces Presenting Micrometer to Nanoscale Heterogeneous Rigidity. Advanced Materials, 29(39), [1702119]. https://doi.org/10.1002/adma.201702119