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Open AccessArticle

Quantitative Study of Morphological Features of Stem Cells onto Photopatterned Azopolymer Films

1
Physics Department “E. Pancini”, Università degli Studi di Napoli “Federico II”, Complesso Universitario di Monte Sant’Angelo, Via Cintia, 80126 Naples, Italy
2
Former Temporary Researcher at Institute of Composite and Biomedical Materials, National Research Council of Italy, Viale Marconi 4, 80125 Naples, Italy
3
Institute of Polymers, Composites and Biomaterials, National Research Council of Italy, Mostra D’Oltremare, Pad.20, V.le J.F. Kennedy 54, 80125 Naples, Italy
4
[email protected]—Fondazione Istituto Italiano di Tecnologia, Via Pascoli 70, 20133 Milano, Italy
*
Authors to whom correspondence should be addressed.
J. Funct. Biomater. 2020, 11(1), 8; https://doi.org/10.3390/jfb11010008
Received: 31 December 2019 / Revised: 6 February 2020 / Accepted: 7 February 2020 / Published: 14 February 2020
(This article belongs to the Special Issue Conductive Polymers and Composites for Medical Application)
In the last decade, the use of photolithography for the fabrication of structured substrates with controlled morphological patterns that are able to interact with cells at micrometric and nanometric size scales is strongly growing. A promising simple and versatile microfabrication method is based on the physical mass transport induced by visible light in photosensitive azobenzene-containing polymers (or azopolymers). Such light-driven material transport produces a modulation of the surface of the azopolymer film, whose geometry is controlled by the intensity and the polarization distributions of the irradiated light. Herein, two anisotropic structured azopolymer films have been used as substrates to evaluate the effects of topological signals on the in vitro response of human mesenchymal stem cells (hMSCs). The light-induced substrate patterns consist of parallel microgrooves, which are produced in a spatially confined or over large-scale areas of the samples, respectively. The analysis of confocal optical images of the in vitro hMSC cells grown on the patterned films offered relevant information about cell morphology—i.e., nuclei deformation and actin filaments elongation—in relation to the geometry and the spatial extent of the structured area of substrates. The results, together with the possibility of simple, versatile, and cost-effective light-induced structuration of azopolymers, promise the successful use of these materials as anisotropic platforms to study the cell guidance mechanisms governing in vitro tissue formation. View Full-Text
Keywords: azopolymers; reconfigurable materials; cell-instructive materials; cell orientation azopolymers; reconfigurable materials; cell-instructive materials; cell orientation
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MDPI and ACS Style

Salvatore, M.; Oscurato, S.L.; D’Albore, M.; Guarino, V.; Zeppetelli, S.; Maddalena, P.; Ambrosio, A.; Ambrosio, L. Quantitative Study of Morphological Features of Stem Cells onto Photopatterned Azopolymer Films. J. Funct. Biomater. 2020, 11, 8.

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