Neural cell pattern formation on glass and oxidized silicon surfaces modified with poly(N-isopropylacrylamide)

Tom Bohanon, Gunter Elender, Wolfgang Knoll, Peter Köberle, Jae Suk Lee, Andreas Offenhäusser, Helmut Ringsdorf, Erich Sackmann, Joachim Simon, Günter Tovar, Françoise M. Winnik

Research output: Contribution to journalArticlepeer-review

53 Scopus citations

Abstract

Control over the adsorption of proteins and over the adsorption and spatial orientation of mammalian cells onto surfaces has been achieved by modification of glass and other silicon oxide substrates with poly(N-isopropylacrylamide) (PNIPAM). The functionalization of the substrates was achieved either by a polymer-analogous reaction of aminosilanes with reactive N-(isopropylacrylamide) (NIPAM)-copolymers and by copolymerization of NIPAM with surface-bound methacrylsilane. The obtained coatings were characterized by FT-IR, ellipsometry, and surface plasmon resonance measurements. The adsorption of two proteins-fibrinogen and ribonuclease A-on these surfaces was studied in situ by real time surface plasmon resonance measurements. The PNlPAM-grafted surfaces prepared by either chemical procedure inhibited the adsorption of both proteins. More importantly they prevented the adhesion of neuroblastomaXglioma hybrid cells cultured either in serum-free medium or in a medium containing serum proteins. Deep-UV irradiation was used to perform ablation processes and to create patterns permitting the examination of spatially controlled adhesion and growth of cells. This study showed that patterned ultrathin polymer films on glass are suitable substrates for controlling the interactions of cells with surfaces and are capable of directing the attachment and spreading of cells.

Original languageEnglish
Pages (from-to)19-39
Number of pages21
JournalJournal of Biomaterials Science, Polymer Edition
Volume8
Issue number1
DOIs
StatePublished - 1 Jan 1997

Keywords

  • Chemically patterned substrate
  • Neuroblastomaxglioma cells
  • Polymer film
  • Protein adsorption

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