Vascularized Tissue Models in Regenerative Engineering

A special issue of Bioengineering (ISSN 2306-5354).

Deadline for manuscript submissions: closed (31 October 2016)

Special Issue Editor


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Guest Editor
Department of Orthopaedics, Room G05.228, University Medical Center Utrecht, PO Box 85500, 3508 GA Utrecht, The Netherlands
Interests: bioprinting; vascularization; bone regeneration; stem cells; gene therapy

Special Issue Information

Dear Colleagues,

Tissue engineering comprises a wide variety of strategies aimed at developing tissue constructs for regeneration or repair of body parts. For almost all tissues, in order to quickly enable nutrient and oxygen supply once the constructs are implanted, it is necessary to develop and include pre-vascularization strategies. Bioprinting plays an increasingly important role in the design of such engineered constructs, as this technology allows the inclusion of interconnected porosity and channels of multiple length scales as well as predefined placement of different cell types, molecular factors and controlled delivery systems. In the development of tissue models, which might replace current animal models and serve for screening purposes, either pharmaceutical or to gain patient specific information, the vascular (micro)environment is also highly relevant.

The current Special Issue seeks contributions addressing (pre)vascularization strategies in biofabrication, either as part of regenerative engineering strategies or as components in tissue model development.

Dr. Jacqueline Alblas
Guest Editor

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Keywords

  • vascularization
  • biofabrication
  • three-dimensional tissue models
  • organ-on–a-chip and human-on-a-chip
  • stem cells, iPS cells
  • controlled drug delivery

Published Papers (1 paper)

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Research

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Article
Longitudinal Stretching for Maturation of Vascular Tissues Using Magnetic Forces
by Timothy R. Olsen, Megan Casco, Austin Herbst, Grace Evans, Taylor Rothermel, Lauren Pruett, Jared Reid, Kelly Barry, Michael P. Jaeggli, Dan T. Simionescu, Richard P. Visconti and Frank Alexis
Bioengineering 2016, 3(4), 29; https://doi.org/10.3390/bioengineering3040029 - 16 Nov 2016
Cited by 8 | Viewed by 5443
Abstract
Cellular spheroids were studied to determine their use as “bioinks” in the biofabrication of tissue engineered constructs. Specifically, magnetic forces were used to mediate the cyclic longitudinal stretching of tissues composed of Janus magnetic cellular spheroids (JMCSs), as part of a post-processing method [...] Read more.
Cellular spheroids were studied to determine their use as “bioinks” in the biofabrication of tissue engineered constructs. Specifically, magnetic forces were used to mediate the cyclic longitudinal stretching of tissues composed of Janus magnetic cellular spheroids (JMCSs), as part of a post-processing method for enhancing the deposition and mechanical properties of an extracellular matrix (ECM). The purpose was to accelerate the conventional tissue maturation process via novel post-processing techniques that accelerate the functional, structural, and mechanical mimicking of native tissues. The results of a forty-day study of JMCSs indicated an expression of collagen I, collagen IV, elastin, and fibronectin, which are important vascular ECM proteins. Most notably, the subsequent exposure of fused tissue sheets composed of JMCSs to magnetic forces did not hinder the production of these key proteins. Quantitative results demonstrate that cyclic longitudinal stretching of the tissue sheets mediated by these magnetic forces increased the Young’s modulus and induced collagen fiber alignment over a seven day period, when compared to statically conditioned controls. Specifically, the elastin and collagen content of these dynamically-conditioned sheets were 35- and three-fold greater, respectively, at seven days compared to the statically-conditioned controls at three days. These findings indicate the potential of using magnetic forces in tissue maturation, specifically through the cyclic longitudinal stretching of tissues. Full article
(This article belongs to the Special Issue Vascularized Tissue Models in Regenerative Engineering)
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