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• W2158053452 abstract "The ability to control the shape and size of cells is an important enabling technique for investigating influences of geometrical variables on cell physiology. Herein we present a micropatterning technique (plasma lithography) that uses photolithography and plasma thin-film polymerization for the fabrication of cell culture substrates with a cell-adhesive pattern on a cell-repellent (non-fouling) background. The micron-level pattern was designed to isolate individual vascular smooth muscle cells (SMC) on areas with a projected area of between 25 and 3600 microm(2) in order to later study their response to cytokine stimulation in dependence of the cell size and shape as an indication for the phenotypic state of the cells. Polyethylene terephthalate substrates were first coated with a non-fouling plasma polymer of tetraglyme (tetraethylene glycol dimethyl ether). In an organic lift-off process, we then fashioned square- and rectangular-shaped islands of a thin fluorocarbon plasma polymer film of approximately 12-nm thickness. Electron spectroscopy for chemical analysis and secondary ion mass spectroscopy were used to optimize the deposition conditions and characterize the resulting polymers. Secondary ion mass spectroscopy imaging was used to visualize the spatial distribution of the polymer components of the micropatterned surfaces. Rat vascular SMC were seeded onto the patterned substrates in serum-free medium to show that the substrates display the desired properties, and that cell shape can indeed be controlled. For long-term maintenance of these cells, the medium was augmented with 10% calf serum after 24 h in culture, and the medium was exchanged every 3 days. After 2 weeks, the cells were still confined to the areas of the adhesive pattern, and when one or more cells spanned more than one island, they did not attach to the intervening tetraethylene glycol dimethyl ether (tetraglyme) background. Spreading-restricted cells formed a well-ordered actin skeleton, which was most dense along the perimeter of the cells. The shape of the nucleus was also influenced by the pattern geometry. These properties make the patterned substrates suitable for investigating if the phenotypic reversion of SMC can be influenced by controlling the shape and size of SMC in vitro." @default.
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• W2158053452 date "2001-01-01" @default.
• W2158053452 modified "2023-10-17" @default.
• W2158053452 title "Control of shape and size of vascular smooth muscle cellsin vitro by plasma lithography" @default.
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• W2158053452 doi "https://doi.org/10.1002/1097-4636(200110)57:1<15::aid-jbm1136>3.0.co;2-n" @default.
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