Tissue reorganization in response to mechanical load increases functionality

Authors: Grenier, GuillaumeRémy-Zolghadri, MurielleLarouche, DanielleGauvin, RobertBaker, KathleenBergeron, FrançoisDupuis, DanielLangelier, ÈveRancourt, DenisAuger, François A.Germain, Lucie
Abstract: In the rapidly growing field of tissue engineering, the functional properties of tissue substitutes are recognized as being of the utmost importance. The present study was designed to evaluate the effects of static mechanical forces on the functionality of the produced tissue constructs. Living tissue sheets reconstructed by the self-assembly approach from human cells, without the addition of synthetic material or extracellular matrix (ECM), were subjected to mechanical load to induce cell and ECM alignment. In addition, the effects of alignment on the function of substitutes reconstructed from these living tissue sheets were evaluated. Our results show that tissue constructs made from living tissue sheets, in which fibroblasts and ECM were aligned, presented higher mechanical resistance. This was assessed by the modulus of elasticity and ultimate strength as compared with tissue constructs in which components were randomly oriented. Moreover, tissue-engineered vascular media made from a prealigned living tissue sheet, produced with smooth muscle cells, possessed greater contractile capacity compared with those produced from living tissue sheets that were not prealigned. These results show that the mechanical force generated by cells during tissue organization is an asset for tissue component alignment. Therefore, this work demonstrates a means to improve the functionality (mechanical and vasocontractile properties) of tissues reconstructed by tissue engineering by taking advantage of the biomechanical forces generated by cells under static strain.
Document Type: Article de recherche
Issue Date: 28 February 2005
Open Access Date: Restricted access
Document version: VoR
Permalink: http://hdl.handle.net/20.500.11794/16681
This document was published in: Tissue Engineering, Vol. 11 (1-2), 90-100 (2005)
Alternative version: 10.1089/ten.2005.11.90
Collection:Articles publiés dans des revues avec comité de lecture

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