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Title: Dynamic photopolymerization produces complex microstructures on hydrogels in a moldless approach to generate a 3D intestinal tissue model
Author: García Castaño, Albert
García Díaz, María
Torras, Núria
Altay, Gizem
Comelles, Jordi
Martínez Fraiz, Elena
Keywords: Teixits (Histologia)
Enginyeria de teixits
Gels (Farmàcia)
Tissue engineering
Gels (Pharmacy)
Issue Date: 25-Feb-2019
Publisher: Institute of Physics Pub.
Abstract: Epithelial tissues contain three-dimensional (3D) complex microtopographies that are essential for proper performance. These microstructures provide cells with the physicochemical cues needed to guide their self-organization into functional tissue structures. However, most in vitro models do not implement these 3D architectural features. The main problem is the availability of simple fabrication techniques that can reproduce the complex geometries found in native tissues on the soft polymeric materials required as cell culture substrates. In this study reaction-diffusion mediated photolithography is used to fabricate 3D microstructures with complex geometries on poly(ethylene glycol)-based hydrogels in a single step and moldless approach. By controlling fabrication parameters such as the oxygen diffusion/depletion timescales, the distance to the light source and the exposure dose, the dimensions and geometry of the microstructures can be well-defined. In addition, copolymerization of poly(ethylene glycol) with acrylic acid improves control of the dynamic reaction-diffusion processes that govern the free-radical polymerization of highly-diluted polymeric solutions. Moreover, acrylic acid allows adjusting the density of cell adhesive ligands while preserving the mechanical properties of the hydrogels. The method proposed is a simple, single-step, and cost-effective strategy for producing models of intestinal epithelium that can be easily integrated into standard cell culture platform
Note: Versió postprint del document publicat a:
It is part of: Biofabrication, 2019, vol. 11, num. 2, p. 025007
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ISSN: 1758-5082
Appears in Collections:Articles publicats en revistes (Electrònica)
Articles publicats en revistes (Institut de Bioenginyeria de Catalunya (IBEC))

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