Biophysical properties of dermal building-blocks affect extra cellular matrix assembly in 3D endogenous macrotissue

The fabrication of functional tissue units is one of the major challenges in tissue engineering due to their in vitro use in tissue-on-chip systems, as well as in modular tissue engineering for the construction of macrotissue analogs. In this work, we aim to engineer dermal tissue micromodules obtai...

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Bibliographic Details
Published in:Biofabrication 2016-01, Vol.8 (1), p.15010-15021
Main Authors: Urciuolo, F, Garziano, A, Imparato, G, Panzetta, V, Fusco, S, Casale, C, Netti, PA
Format: Article
Language:English
Subjects:
Cellular
Construction
dermis
ECM
Electrochemical machining
In vitro testing
Micromodules
microscaffold
Modular
Three dimensional
Tissue engineering
tissue micromodule
TOC
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Summary:The fabrication of functional tissue units is one of the major challenges in tissue engineering due to their in vitro use in tissue-on-chip systems, as well as in modular tissue engineering for the construction of macrotissue analogs. In this work, we aim to engineer dermal tissue micromodules obtained by culturing human dermal fibroblasts into porous gelatine microscaffold. We proved that such stromal cells coupled with gelatine microscaffolds are able to synthesize and to assemble an endogenous extracellular matrix (ECM) resulting in tissue micromodules, which evolve their biophysical features over the time. In particular, we found a time-dependent variation of oxygen consumption kinetic parameters, of newly formed ECM stiffness and of micromodules self-aggregation properties. As consequence when used as building blocks to fabricate larger tissues, the initial tissue micromodules state strongly affects the ECM organization and maturation in the final macrotissue. Such results highlight the role of the micromodules properties in controlling the formation of three-dimensional macrotissue in vitro, defining an innovative design criterion for selecting tissue-building blocks for modular tissue engineering.
ISSN:1758-5090
1758-5082
1758-5090
DOI:10.1088/1758-5090/8/1/015010