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J. Funct. Biomater. 2011, 2(3), 107-118; doi:10.3390/jfb2030107

A Novel Pulsatile Bioreactor for Mechanical Stimulation of Tissue Engineered Cardiac Constructs

1
Department of Cardiac Surgery, University of Munich, Marchioninistrasse 15, 81377 Munich, Germany
2
Chair of Medical Engineering, Technische Universität München, Boltzmannstrasse 15, 85748 Garching, Germany
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Received: 21 June 2011 / Accepted: 18 July 2011 / Published: 20 July 2011
(This article belongs to the Special Issue Stem Cells and Biomaterials)
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Abstract

After myocardial infarction, the implantation of stem cell seeded scaffolds on the ischemic zone represents a promising strategy for restoration of heart function. However, mechanical integrity and functionality of tissue engineered constructs need to be determined prior to implantation. Therefore, in this study a novel pulsatile bioreactor mimicking the myocardial contraction was developed to analyze the behavior of mesenchymal stem cells derived from umbilical cord tissue (UCMSC) colonized on titanium-coated polytetrafluorethylene scaffolds to friction stress. The design of the bioreactor enables a simple handling and defined mechanical forces on three seeded scaffolds at physiological conditions. The compact system made of acrylic glass, Teflon®, silicone, and stainless steel allows the comparison of different media, cells and scaffolds. The bioreactor can be gas sterilized and actuated in a standard incubator. Macroscopic observations and pressure-measurements showed a uniformly sinusoidal pulsation, indicating that the bioreactor performed well. Preliminary experiments to determine the adherence rate and morphology of UCMSC after mechanical loadings showed an almost confluent cellular coating without damage on the cell surface. In summary, the bioreactor is an adequate tool for the mechanical stress of seeded scaffolds and offers dynamic stimuli for pre-conditioning of cardiac tissue engineered constructs in vitro. View Full-Text
Keywords: tissue engineering; bioreactor; mechanical stimulation; mesenchymal stem cells; cardiac differentiation; umbilical cord tissue engineering; bioreactor; mechanical stimulation; mesenchymal stem cells; cardiac differentiation; umbilical cord
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This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Hollweck, T.; Akra, B.; Häussler, S.; Überfuhr, P.; Schmitz, C.; Pfeifer, S.; Eblenkamp, M.; Wintermantel, E.; Eissner, G. A Novel Pulsatile Bioreactor for Mechanical Stimulation of Tissue Engineered Cardiac Constructs. J. Funct. Biomater. 2011, 2, 107-118.

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