TY - JOUR
T1 - Neural cell pattern formation on glass and oxidized silicon surfaces modified with poly(N-isopropylacrylamide)
AU - Bohanon, Tom
AU - Elender, Gunter
AU - Knoll, Wolfgang
AU - Köberle, Peter
AU - Lee, Jae Suk
AU - Offenhäusser, Andreas
AU - Ringsdorf, Helmut
AU - Sackmann, Erich
AU - Simon, Joachim
AU - Tovar, Günter
AU - Winnik, Françoise M.
PY - 1997/1/1
Y1 - 1997/1/1
N2 - 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.
AB - 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.
KW - Chemically patterned substrate
KW - Neuroblastomaxglioma cells
KW - Polymer film
KW - Protein adsorption
UR - http://www.scopus.com/inward/record.url?scp=10344222197&partnerID=8YFLogxK
U2 - 10.1163/156856297X00551
DO - 10.1163/156856297X00551
M3 - Article
C2 - 8933288
AN - SCOPUS:10344222197
SN - 0920-5063
VL - 8
SP - 19
EP - 39
JO - Journal of Biomaterials Science, Polymer Edition
JF - Journal of Biomaterials Science, Polymer Edition
IS - 1
ER -