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Issue 41, 2018
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Endothelial, smooth muscle and fibroblast cell sheet fabrication from self-assembled thermoresponsive poly(glycidyl ether) brushes

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Abstract

In this study, we introduce a platform to fabricate human dermal fibroblast (HDF), human aortic smooth muscle cell (HAoSMC) and human umbilical vein endothelial cell (HUVEC) sheets using thermoresponsive poly(glycidyl ether) coatings. Copolymer brushes based on glycidyl methyl ether (GME) and ethyl glycidyl ether (EGE) were self-assembled onto polystyrene (PS) culture substrates via the physical adsorption of a hydrophobic, photoreactive benzophenone anchor block based on the monomer 4-[2-(2,3-epoxypropoxy)ethoxy]benzophenone (EEBP). The directed self-assembly of well-defined, end-tethered poly(GME-ran-EGE)-block-poly(EEBP) (PGE) brushes was achieved via the selective, EEBP-driven adsorption of the asymmetric block copolymer from dilute aqueous solution below its cloud point temperature (CPT). Subsequently, the PGE brush layers were covalently immobilized onto the PS surfaces by irradiation with UV light and characterized by ellipsometry, static water contact angle (CA) measurements and atomic force microscopy (AFM). We found that, by decreasing the temperature from 37 to 20 °C, the coatings undergo a pancake-to-brush transition, which triggers cell sheet detachment. In addition, cell culture parameters were optimized to allow proper adhesion and controlled detachment of confluent HDF, HAoSMC and HUVEC sheets, which can be applied in vascular tissue engineering.

Graphical abstract: Endothelial, smooth muscle and fibroblast cell sheet fabrication from self-assembled thermoresponsive poly(glycidyl ether) brushes

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Supplementary files

Article information


Submitted
29 May 2018
Accepted
01 Oct 2018
First published
02 Oct 2018

Soft Matter, 2018,14, 8333-8343
Article type
Paper

Endothelial, smooth muscle and fibroblast cell sheet fabrication from self-assembled thermoresponsive poly(glycidyl ether) brushes

D. D. Stöbener, A. Hoppensack, J. Scholz and M. Weinhart, Soft Matter, 2018, 14, 8333
DOI: 10.1039/C8SM01099D

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