Plasma stencilling methods for cell patterning.
In this paper we describe plasma stencilling techniques for patterning 10 mammalian cell lines on hydrophobic and cell repellent poly(dimethylsiloxane) (PDMS), methylated glass and bacterial grade polystyrene surfaces. An air plasma produced with a Tesla generator operating at atmospheric pressure was used with microengineered stencils for patterned surface oxidation, selectively transforming the surface to a hydrophilic state to enable cell adhesion and growth. Plasma stencilling obviates the need for directly patterning cell adhesion molecules. Instead, during cell culture, adhesion proteins from the media assemble in a bioactive form on the hydrophilic regions. Critically, the removal of protein patterning prior to cell culture provides the option to also use PDMS-PDMS plasma bonding to incorporate cell patterns within microfluidic systems. Linear patterns were generated using PDMS microchannel stencils, and polyimide stencils with through holes were used for the production of cellular arrays. For the production of smaller cellular arrays, a novel microcapillary-based dielectric barrier discharge system was developed. A numerical method to characterise the cell patterns is also introduced and was used to demonstrate that plasma stencilling is highly effective, with complete patterns confined during long term cell culture (>10 days). In summary, plasma stencilling is simple, rapid, inexpensive, reproducible and a potentially universal cell line patterning capability.
Frimat
Jean-Philippe
JP
Institute for Analytical Sciences, Bunsen-Kirchhoff-Str. 11, 44139, Dortmund, Germany. frimat@isas.de
Menne
Heike
H
Michels
Antje
A
Kittel
Silke
S
Kettler
Raffael
R
Borgmann
Sabine
S
Franzke
Joachim
J
West
Jonathan
J
D000818:Animals; D001672:Biocompatible Materials / Q000737:chemistry; D002448:Cell Adhesion; D002460:Cell Line; D049109:Cell Proliferation; D004129:Dimethylpolysiloxanes / Q000737:chemistry*; D004847:Epithelial Cells / Q000166:cytology; D005898:Glass / Q000737:chemistry*; D006801:Humans; D057927:Hydrophobic and Hydrophilic Interactions; D008745:Methylation; D046210:Microfluidic Analytical Techniques / Q000295:instrumentation / Q000379:methods*; D011137:Polystyrenes / Q000737:chemistry*; D013499:Surface Properties; D046509:Tissue Culture Techniques / Q000295:instrumentation / Q000379:methods*
D001672:Biocompatible Materials; D004129:Dimethylpolysiloxanes; D011137:Polystyrenes