Fibroblast growth on micro- and nanopatterned surfaces prepared by a novel sol–gel phase separation method
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Physical characteristics of the growth substrate including nano- and microstructure play crucial role in determining the behaviour of the cells in a given biological context. To test the effect of varying the supporting surface structure on cell growth we applied a novel sol–gel phase separation-based method to prepare micro- and nanopatterned surfaces with round surface structure features. Variation in the size of structural elements was achieved by solvent variation and adjustment of sol concentration. Growth characteristics and morphology of primary human dermal fibroblasts were found to be significantly modulated by the microstructure of the substrate. The increase in the size of the structural elements, lead to increased inhibition of cell growth, altered morphology (increased cytoplasmic volume), enlarged cell shape, decrease in the number of filopodia) and enhancement of cell senescence. These effects are likely mediated by the decreased contact between the cell membrane and the growth substrate. However, in the case of large surface structural elements other factors like changes in the 3D topology of the cell’s cytoplasm might also play a role.
KeywordsContact Angle Nanopatterned Surface Primary Human Dermal Fibroblast Water Droplet Contact Angle Olympus Company
The authors thank Dr. Tõnu Järveots, Veterinary Medicine and Animal Sciences, Estonian University of Life Sciences, for use of his Critical point dryer and Jürgen Innos, Department of Physiology, University of Tartu, for language correction of this article. This study was financially supported by the funding from the Estonian Ministry of Education and Research targeted financing SF0180148s08, SF0180058s07 by the Estonian Science Foundation research grant funding ETF6576, and ETF7479, ETF8428, ETF8420, ETF8377, ETF8932, ETF9282, by EMBO Installation Grant, by the European Union through the European Regional Development Fund via Estonia–Latvia Program and Developing Estonian–Latvian Medical Area project and Centre of Excellence “Mesosystems: Theory and Applications” and by European Social Fund project Functional Materials and Processes 1.2.0401.09-0079.
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