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Kawecki F, L'Heureux N. Current biofabrication methods for vascular tissue engineering and an introduction to biological textiles. Biofabrication 2023; 15:022004. [PMID: 36848675 DOI: 10.1088/1758-5090/acbf7a] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Accepted: 02/27/2023] [Indexed: 03/01/2023]
Abstract
Cardiovascular diseases are the leading cause of mortality in the world and encompass several important pathologies, including atherosclerosis. In the cases of severe vessel occlusion, surgical intervention using bypass grafts may be required. Synthetic vascular grafts provide poor patency for small-diameter applications (< 6 mm) but are widely used for hemodialysis access and, with success, larger vessel repairs. In very small vessels, such as coronary arteries, synthetics outcomes are unacceptable, leading to the exclusive use of autologous (native) vessels despite their limited availability and, sometimes, quality. Consequently, there is a clear clinical need for a small-diameter vascular graft that can provide outcomes similar to native vessels. Many tissue-engineering approaches have been developed to offer native-like tissues with the appropriate mechanical and biological properties in order to overcome the limitations of synthetic and autologous grafts. This review overviews current scaffold-based and scaffold-free approaches developed to biofabricate tissue-engineered vascular grafts (TEVGs) with an introduction to the biological textile approaches. Indeed, these assembly methods show a reduced production time compared to processes that require long bioreactor-based maturation steps. Another advantage of the textile-inspired approaches is that they can provide better directional and regional control of the TEVG mechanical properties.
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Affiliation(s)
- Fabien Kawecki
- Univ. Bordeaux, INSERM, BIOTIS, UMR1026, Bordeaux, F-33000, France
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2
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Wang Y, Li G, Yang L, Luo R, Guo G. Development of Innovative Biomaterials and Devices for the Treatment of Cardiovascular Diseases. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2201971. [PMID: 35654586 DOI: 10.1002/adma.202201971] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 05/29/2022] [Indexed: 06/15/2023]
Abstract
Cardiovascular diseases have become the leading cause of death worldwide. The increasing burden of cardiovascular diseases has become a major public health problem and how to carry out efficient and reliable treatment of cardiovascular diseases has become an urgent global problem to be solved. Recently, implantable biomaterials and devices, especially minimally invasive interventional ones, such as vascular stents, artificial heart valves, bioprosthetic cardiac occluders, artificial graft cardiac patches, atrial shunts, and injectable hydrogels against heart failure, have become the most effective means in the treatment of cardiovascular diseases. Herein, an overview of the challenges and research frontier of innovative biomaterials and devices for the treatment of cardiovascular diseases is provided, and their future development directions are discussed.
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Affiliation(s)
- Yunbing Wang
- National Engineering Research Center for Biomaterials and College of Biomedical Engineering, Sichuan University, 29 Wangjiang Road, Chengdu, 610064, China
| | - Gaocan Li
- National Engineering Research Center for Biomaterials and College of Biomedical Engineering, Sichuan University, 29 Wangjiang Road, Chengdu, 610064, China
| | - Li Yang
- National Engineering Research Center for Biomaterials and College of Biomedical Engineering, Sichuan University, 29 Wangjiang Road, Chengdu, 610064, China
| | - Rifang Luo
- National Engineering Research Center for Biomaterials and College of Biomedical Engineering, Sichuan University, 29 Wangjiang Road, Chengdu, 610064, China
| | - Gaoyang Guo
- National Engineering Research Center for Biomaterials and College of Biomedical Engineering, Sichuan University, 29 Wangjiang Road, Chengdu, 610064, China
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3
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Mohapatra SR, Rama E, Melcher C, Call T, Al Enezy-Ulbrich MA, Pich A, Apel C, Kiessling F, Jockenhoevel S. From In Vitro to Perioperative Vascular Tissue Engineering: Shortening Production Time by Traceable Textile-Reinforcement. Tissue Eng Regen Med 2022; 19:1169-1184. [PMID: 36201158 PMCID: PMC9679079 DOI: 10.1007/s13770-022-00482-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 07/18/2022] [Accepted: 07/20/2022] [Indexed: 12/01/2022] Open
Abstract
Background: The production of tissue-engineered vascular graft (TEVG) usually involves a prolonged bioreactor cultivation period of up to several weeks to achieve maturation of extracellular matrix and sufficient mechanical strength. Therefore, we aimed to substantially shorten this conditioning time by combining a TEVG textile scaffold with a recently developed copolymer reinforced fibrin gel as a cell carrier. We further implemented our grafts with magnetic resonance imaging (MRI) contrast agents to allow the in-vitro monitoring of the TEVG’s remodeling process. Methods: Biodegradable polylactic-co-glycolic acid (PLGA) was electrospun onto a non-degradable polyvinylidene fluoride scaffold and molded along with copolymer-reinforced fibrin hydrogel and human arterial cells. Mechanical tests on the TEVGs were performed both instantly after molding and 4 days of bioreactor conditioning. The non-invasive in vitro monitoring of the PLGA degradation and the novel imaging of fluorinated thermoplastic polyurethane (19F-TPU) were performed using 7T MRI. Results: After 4 days of close loop bioreactor conditioning, 617 ± 85 mmHg of burst pressure was achieved, and advanced maturation of extracellular matrix (ECM) was observed by immunohistology, especially in regards to collagen and smooth muscle actin. The suture retention strength (2.24 ± 0.3 N) and axial tensile strength (2.45 ± 0.58 MPa) of the TEVGs achieved higher values than the native arteries used as control. The contrast agents labeling of the TEVGs allowed the monitorability of the PLGA degradation and enabled the visibility of the non-degradable textile component. Conclusion: Here, we present a concept for a novel textile-reinforced TEVG, which is successfully produced in 4 days of bioreactor conditioning, characterized by increased ECM maturation and sufficient mechanical strength. Additionally, the combination of our approach with non-invasive imaging provides further insights into TEVG’s clinical application. Supplementary Information The online version contains supplementary material available at 10.1007/s13770-022-00482-0.
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Affiliation(s)
- Saurav Ranjan Mohapatra
- Department of Biohybrid and Medical Textiles (BioTex), Center for Biohybrid Medical Systems (CBMS), Institute for Applied Medical Engineering, RWTH Aachen University, Forckenbeckstr. 55, 52074, Aachen, Germany
| | - Elena Rama
- Institute for Experimental Molecular Imaging, RWTH Aachen University, Forckenbeckstr. 55, 52074, Aachen, Germany
| | - Christoph Melcher
- Institute for Textile Technology, RWTH Aachen University, Otto-Blumenthal-Str. 1, 52074, Aachen, Germany
| | - Tobias Call
- Department of Biohybrid and Medical Textiles (BioTex), Center for Biohybrid Medical Systems (CBMS), Institute for Applied Medical Engineering, RWTH Aachen University, Forckenbeckstr. 55, 52074, Aachen, Germany
| | | | - Andrij Pich
- DWI-Leibniz Institute for Interactive Materials, RWTH Aachen University, Forckenbeckstr. 50, 52074, Aachen, Germany
| | - Christian Apel
- Department of Biohybrid and Medical Textiles (BioTex), Center for Biohybrid Medical Systems (CBMS), Institute for Applied Medical Engineering, RWTH Aachen University, Forckenbeckstr. 55, 52074, Aachen, Germany
| | - Fabian Kiessling
- Institute for Experimental Molecular Imaging, RWTH Aachen University, Forckenbeckstr. 55, 52074, Aachen, Germany
| | - Stefan Jockenhoevel
- Department of Biohybrid and Medical Textiles (BioTex), Center for Biohybrid Medical Systems (CBMS), Institute for Applied Medical Engineering, RWTH Aachen University, Forckenbeckstr. 55, 52074, Aachen, Germany.
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Fayon A, Menu P, El Omar R. Cellularized small-caliber tissue-engineered vascular grafts: looking for the ultimate gold standard. NPJ Regen Med 2021; 6:46. [PMID: 34385472 PMCID: PMC8361171 DOI: 10.1038/s41536-021-00155-x] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Accepted: 07/23/2021] [Indexed: 02/07/2023] Open
Abstract
Due to the lack of efficacy of synthetic vascular substitutes in the replacement of small-caliber arteries, vascular tissue engineering (VTE) has emerged as a promising solution to produce viable small-caliber tissue-engineered vascular grafts (TEVG). Previous studies have shown the importance of a cellular intimal layer at the luminal surface of TEVG to prevent thrombotic events. However, the cellularization of a TEVG seems to be a critical approach to consider in the development of a TEVG. To date, no standard cellularization method or cell type has been established to create the ideal TEVG by promoting its long-term patency and function. In this review, advances in VTE are described and discussed with a particular focus on the construction approaches of cellularized small-caliber TEVGs, the cell types used, as well as their preclinical and clinical applications.
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Affiliation(s)
- Adrien Fayon
- Université de Lorraine, CNRS, IMoPA, F-54000 Nancy, France
| | - Patrick Menu
- Université de Lorraine, CNRS, IMoPA, F-54000 Nancy, France.
- Université de Lorraine, Faculté de Pharmacie, Nancy, F-54000, France.
| | - Reine El Omar
- Université de Lorraine, CNRS, IMoPA, F-54000 Nancy, France
- Université de Lorraine, Faculté de Pharmacie, Nancy, F-54000, France
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Kreimendahl F, Kniebs C, Tavares Sobreiro AM, Schmitz-Rode T, Jockenhoevel S, Thiebes AL. FRESH bioprinting technology for tissue engineering - the influence of printing process and bioink composition on cell behavior and vascularization. J Appl Biomater Funct Mater 2021; 19:22808000211028808. [PMID: 34282976 DOI: 10.1177/22808000211028808] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The rapid and tailored biofabrication of natural materials is of high interest for the field of tissue engineering and regenerative medicine. Scaffolds require both high biocompatibility and tissue-dependent mechanical strength to function as basis for tissue-engineered implants. Thus, natural hydrogels such as fibrin are promising but their rapid biofabrication remains challenging. Printing of low viscosity and slow polymerizing solutions with good spatial resolution can be achieved by freeform reversible embedding of suspended hydrogels (FRESH) bioprinting of cell-laden natural hydrogels. In this study, fibrin and hyaluronic acid were used as single components as well as blended ink mixtures for the FRESH bioprinting. Rheometry revealed that single materials were less viscous than the blended bioink showing higher values for viscosity over a shear rate of 10-1000 s-1. While fibrin showed viscosities between 0.1624 and 0.0017 Pa·s, the blended ink containing fibrin and hyaluronic acid were found to be in a range of 0.1-1 Pa·s. In 3D vascularization assays, formation of vascular structures within the printed constructs was investigated indicating that the printing process did not harm cells and allowed formation of vasculature comparable to moulded control samples. Best values for vascularization were achieved in bioinks consisting of 1.0% fibrin-0.5% hyaluronic acid. The vascular structure area and length were three times higher compared to other tested bioinks, and structure volume as well as number of branches revealed almost four times higher values. In this study, we combined the benefits of the FRESH printing technique with in vitro vascularization, showing that it is possible to achieve a mechanically stable small-scale hydrogel construct incorporating vascular network formation.
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Affiliation(s)
- Franziska Kreimendahl
- Department of Biohybrid and Medical Textiles (BioTex), Institute of Applied Medical Engineering, Helmholtz Institute Aachen, RWTH Aachen University, Aachen, Germany.,Faculty of Science and Engineering, Aachen-Maastricht Institute for Biobased Materials, Maastricht University, Brightlands Chemelot Campus, Geleen, The Netherlands
| | - Caroline Kniebs
- Department of Biohybrid and Medical Textiles (BioTex), Institute of Applied Medical Engineering, Helmholtz Institute Aachen, RWTH Aachen University, Aachen, Germany.,Faculty of Science and Engineering, Aachen-Maastricht Institute for Biobased Materials, Maastricht University, Brightlands Chemelot Campus, Geleen, The Netherlands
| | - Ana Margarida Tavares Sobreiro
- Department of Biohybrid and Medical Textiles (BioTex), Institute of Applied Medical Engineering, Helmholtz Institute Aachen, RWTH Aachen University, Aachen, Germany
| | - Thomas Schmitz-Rode
- Department of Biohybrid and Medical Textiles (BioTex), Institute of Applied Medical Engineering, Helmholtz Institute Aachen, RWTH Aachen University, Aachen, Germany
| | - Stefan Jockenhoevel
- Department of Biohybrid and Medical Textiles (BioTex), Institute of Applied Medical Engineering, Helmholtz Institute Aachen, RWTH Aachen University, Aachen, Germany.,Faculty of Science and Engineering, Aachen-Maastricht Institute for Biobased Materials, Maastricht University, Brightlands Chemelot Campus, Geleen, The Netherlands
| | - Anja Lena Thiebes
- Department of Biohybrid and Medical Textiles (BioTex), Institute of Applied Medical Engineering, Helmholtz Institute Aachen, RWTH Aachen University, Aachen, Germany.,Faculty of Science and Engineering, Aachen-Maastricht Institute for Biobased Materials, Maastricht University, Brightlands Chemelot Campus, Geleen, The Netherlands
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6
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Jiang C, Wang K, Liu Y, Zhang C, Wang B. Application of textile technology in tissue engineering: A review. Acta Biomater 2021; 128:60-76. [PMID: 33962070 DOI: 10.1016/j.actbio.2021.04.047] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 03/26/2021] [Accepted: 04/26/2021] [Indexed: 12/14/2022]
Abstract
One of the key elements in tissue engineering is to design and fabricate scaffolds with tissue-like properties. Among various scaffold fabrication methods, textile technology has shown its unique advantages in mimicking human tissues' properties such as hierarchical, anisotropic, and strain-stiffening properties. As essential components in textile technology, textile patterns affect the porosity, architecture, and mechanical properties of textile-based scaffolds. However, the potential of various textile patterns has not been fully explored when fabricating textile-based scaffolds, and the effect of different textile patterns on scaffold properties has not been thoroughly investigated. This review summarizes textile technology development and highlights its application in tissue engineering to facilitate the broader application of textile technology, especially various textile patterns in tissue engineering. The potential of using different textile methods such as weaving, knitting, and braiding to mimic properties of human tissues is discussed, and the effect of process parameters in these methods on fabric properties is summarized. Finally, perspectives on future directions for explorations are presented. STATEMENT OF SIGNIFICANCE: Recently, biomedical engineers have applied textile technology to fabricate scaffolds for tissue engineering applications. Various textile methods, especially weaving, knitting, and braiding, enables engineers to customize the physical, mechanical, and biological properties of scaffolds. However, most textile-based scaffolds only use simple textile patterns, and the effect of different textile patterns on scaffold properties has not been thoroughly investigated. In this review, we cover for the first time the effect of process parameters in different textile methods on fabric properties, exploring the potential of using different textile methods to mimic properties of human tissues. Previous advances in textile technology are presented, and future directions for explorations are presented, hoping to facilitate new breakthroughs of textile-based tissue engineering.
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Affiliation(s)
- Chen Jiang
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, United States; Georgia Tech Manufacturing Institute, Georgia Institute of Technology, Atlanta, GA 30332, United States
| | - Kan Wang
- Georgia Tech Manufacturing Institute, Georgia Institute of Technology, Atlanta, GA 30332, United States.
| | - Yi Liu
- Georgia Tech Manufacturing Institute, Georgia Institute of Technology, Atlanta, GA 30332, United States; School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA 30318, United States
| | - Chuck Zhang
- Georgia Tech Manufacturing Institute, Georgia Institute of Technology, Atlanta, GA 30332, United States; H. Milton Stewart School of Industrial and System Engineering, Georgia Institute of Technology, Atlanta, GA 30332, United States
| | - Ben Wang
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, United States; Georgia Tech Manufacturing Institute, Georgia Institute of Technology, Atlanta, GA 30332, United States; H. Milton Stewart School of Industrial and System Engineering, Georgia Institute of Technology, Atlanta, GA 30332, United States
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7
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He Z, Liu G, Ma X, Yang D, Li Q, Li N. Comparison of small-diameter decellularized scaffolds from the aorta and carotid artery of pigs. Int J Artif Organs 2020; 44:350-360. [PMID: 32988264 DOI: 10.1177/0391398820959350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
AIM Tissue-specific extracellular matrix promotes tissue regeneration and repair. We aimed to identify the optimal decellularized matrices for tissue-engineered vascular graft (TEVG). METHODS Decellularized aorta of fetal pigs (DAFP, n = 6, group A), decellularized aorta of adult pigs (DAAP, n = 6, group B), and decellularized carotid artery of adult pigs (DCAP, n = 6, group C) were prepared. Scaffolds were compared using histology and ultrastructure. Endothelial cell (EC) and myofibroblast (MFB) infiltration assessments were performed in vitro. Cell infiltration was measured in vivo. Biomechanical properties were also determined. RESULTS Almost original cells were removed by the acellularization procedure, while the construction of the matrix basically remained. In vitro, monolayer ECs and multi-layer MFBs were formed onto the internal surface of the specimens after 3 weeks. In vivo, cell infiltration in group A significantly increased at the 6th and 8th week when compared with groups B and C (p < 0.01). The infiltrated cells were mainly MFBs and a few CD4+ T-lymphocytes/macrophages in the specimens. Groups A and B showed greater axial compliance than group C (p < 0.01). CONCLUSION DAFP was the most suitable for use as a small-caliber vascular graft.
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Affiliation(s)
- Zhijuan He
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China
| | - Guofeng Liu
- Department of Plastic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China
| | - Xu Ma
- Department of Plastic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China
| | - Daping Yang
- Department of Plastic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China
| | - Qingchun Li
- Department of Plastic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China
| | - Ning Li
- Department of Plastic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China
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8
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Hierarchical biofabrication of biomimetic collagen-elastin vascular grafts with controllable properties via lyophilisation. Acta Biomater 2020; 112:52-61. [PMID: 32525053 DOI: 10.1016/j.actbio.2020.06.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2019] [Revised: 05/28/2020] [Accepted: 06/02/2020] [Indexed: 12/19/2022]
Abstract
This article describes the development of a hierarchical biofabrication technique suitable to create large but complex structures, such as vascular mimicking grafts, using facile lyophilisation technology amenable to multiple other biomaterial classes. The combination of three fabrication techniques together, namely solvent evaporation, lyophilisation, and crosslinking together allows highly tailorable structures from the microstructure up to the macrostructure, and with the ability to independently crosslink each layer it allows great flexibility to match desired native mechanical properties independently of the micro/macrostructure. We have demonstrated the flexibility of this biofabrication technique by independently optimising each of the layers to create a multi-layered arterial structure with tailored architectural and biophysical/biochemical properties using a collagen-elastin composite. Taken together, the facile biofabrication methodology developed has led to the development of a biomimetic bilayered scaffold suitable for use as a tissue engineered vascular graft (for haemodialysis access or peripheral/coronary bypass), or as an in vitro test platform to examine disease progression, pharmacological toxicity, or cardiovascular medical device testing. STATEMENT OF SIGNIFICANCE: The ability to grow large complex tissues such as blood vessels for transplantation is often hampered by the limitations of the selected biofabrication technique. Here, we sought to overcome some of the fabrication limitations for naturally occurring cardiovascular polymers (collagen/elastin) via a hierarchical approach to fabrication where each layer is built upon the previous. This approach enabled the flexibility to modify and tailor each layer's properties independently via control over polymer concentration, microstructure, and crosslinking. This simple approach facilitated us to fabricate multi-layered vascular grafts which were remodelled into high-density vascular tissue after 21-days. The fabrication approach could be translated to a myriad of other tissues while the engineered vascular graft could also be used as a test platform for drugs/medical devices or as a tissue engineering scaffold for vascular grafting for different indications.
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Jafarihaghighi F, Ardjmand M, Mirzadeh A, Hassani MS, Parizi SS. Current challenges and future trends in manufacturing small diameter artificial vascular grafts in bioreactors. Cell Tissue Bank 2020; 21:377-403. [PMID: 32415569 DOI: 10.1007/s10561-020-09837-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Accepted: 05/09/2020] [Indexed: 01/17/2023]
Abstract
Cardiovascular diseases are a leading cause of death. Vascular surgery is mainly used to solve this problem. However, the generation of a functional and suitable substitute for small diameter (< 6 mm) displacement is challengeable. Moreover, synthetic prostheses, made of polyethylene terephthalate and extended polytetrafluoroethylene show have shown insufficient performance. Therefore, the challenges dominating the use of autografts have prevented their efficient use. Tissue engineering is highlighted in regenerative medicine perhaps in aiming to address the issue of end-stage organ failure. While organs and complex tissues require the vascular supply to support the graft survival and render the bioartificial organ role, vascular tissue engineering has shown to be a hopeful method for cell implantation by the production of tissues in vitro. Bioreactors are a salient point in vascular tissue engineering due to the capability for reproducible and controlled variations showing a new horizon in blood vessel substitution. This review strives to display the overview of current concepts in the development of small-diameter by using bioreactors. In this work, we show a critical look at different factors for developing small-diameter and give suggestions for future studies.
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Affiliation(s)
- Farid Jafarihaghighi
- Department of Chemical Engineering, South Tehran Branch, Islamic Azad University, Tehran, Iran
| | - Mehdi Ardjmand
- Department of Chemical Engineering, South Tehran Branch, Islamic Azad University, Tehran, Iran.
| | - Abolfazl Mirzadeh
- Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Parkville, VIC, 3052, Australia
| | - Mohammad Salar Hassani
- Department of Chemical Engineering, South Tehran Branch, Islamic Azad University, Tehran, Iran
| | - Shahriar Salemi Parizi
- Department of Chemical Engineering, South Tehran Branch, Islamic Azad University, Tehran, Iran
- Young Researchers and Elite Club, South Tehran Branch, Islamic Azad University, Tehran, Iran
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Barua R, Giria H, Datta S, Roy Chowdhury A, Datta P. Force modeling to develop a novel method for fabrication of hollow channels inside a gel structure. Proc Inst Mech Eng H 2019; 234:223-231. [PMID: 31774361 DOI: 10.1177/0954411919891654] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Fabrication of hollow channels with user-defined dimensions and patterns inside viscoelastic, gel-type materials is required for several applications, especially in biomedical engineering domain. These include objectives of obtaining vascularized tissues and enclosed or subsurface microfluidic devices. However, presently there is no suitable manufacturing technology that can create such channels and networks in a gel structure. The advent of three-dimensional bioprinting has opened new possibilities for fabricating structures with complex geometries. However, application of this technique to fabricate internal hollow channels in viscoelastic material has not been yet explored to a great extent. In this article, we present the theoretical modeling/background of a proposed manufacturing paradigm through which hollow channels can be conveniently fabricated inside a gel structure. We propose that a tip connected to a robotic arm can be moved in X-, Y-, and Z-axis as per the desired design. The tip can be moved by a magnet or mechanical force. If the tip is further trailed with porous tube and moved inside the viscoelastic material, corresponding internal channels can be fabricated. To achieve this, however, force modeling to understand the forces that will be required to move the tip inside viscoelastic material should be known and understood. Therefore, in our first attempt, we developed the computational force modeling of the tip movement inside gels with different viscoelastic properties to create the channels.
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Affiliation(s)
- Ranjit Barua
- Centre for Healthcare Science and Technology, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, India
| | - Himanshu Giria
- Department of Aerospace Engineering and Applied Mechanics, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, India
| | - Sudipto Datta
- Centre for Healthcare Science and Technology, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, India
| | - Amit Roy Chowdhury
- Centre for Healthcare Science and Technology, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, India.,Department of Aerospace Engineering and Applied Mechanics, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, India
| | - Pallab Datta
- Centre for Healthcare Science and Technology, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, India
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Wang Z, Mithieux SM, Weiss AS. Fabrication Techniques for Vascular and Vascularized Tissue Engineering. Adv Healthc Mater 2019; 8:e1900742. [PMID: 31402593 DOI: 10.1002/adhm.201900742] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Revised: 07/12/2019] [Indexed: 12/19/2022]
Abstract
Impaired or damaged blood vessels can occur at all levels in the hierarchy of vascular systems from large vasculatures such as arteries and veins to meso- and microvasculatures such as arterioles, venules, and capillary networks. Vascular tissue engineering has become a promising approach for fabricating small-diameter vascular grafts for occlusive arteries. Vascularized tissue engineering aims to fabricate meso- and microvasculatures for the prevascularization of engineered tissues and organs. The ideal small-diameter vascular graft is biocompatible, bridgeable, and mechanically robust to maintain patency while promoting tissue remodeling. The desirable fabricated meso- and microvasculatures should rapidly integrate with the host blood vessels and allow nutrient and waste exchange throughout the construct after implantation. A number of techniques used, including engineering-based and cell-based approaches, to fabricate these synthetic vasculatures are herein explored, as well as the techniques developed to fabricate hierarchical structures that comprise multiple levels of vasculature.
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Affiliation(s)
- Ziyu Wang
- School of Life and Environmental Sciences University of Sydney NSW 2006 Australia
- Charles Perkins Centre University of Sydney NSW 2006 Australia
| | - Suzanne M. Mithieux
- School of Life and Environmental Sciences University of Sydney NSW 2006 Australia
- Charles Perkins Centre University of Sydney NSW 2006 Australia
| | - Anthony S. Weiss
- School of Life and Environmental Sciences University of Sydney NSW 2006 Australia
- Charles Perkins Centre University of Sydney NSW 2006 Australia
- Bosch Institute University of Sydney NSW 2006 Australia
- Sydney Nano Institute University of Sydney NSW 2006 Australia
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12
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Millet M, Ben Messaoud R, Luthold C, Bordeleau F. Coupling Microfluidic Platforms, Microfabrication, and Tissue Engineered Scaffolds to Investigate Tumor Cells Mechanobiology. MICROMACHINES 2019; 10:E418. [PMID: 31234497 PMCID: PMC6630383 DOI: 10.3390/mi10060418] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/11/2019] [Revised: 06/15/2019] [Accepted: 06/19/2019] [Indexed: 12/11/2022]
Abstract
The tumor microenvironment (TME) is composed of dynamic and complex networks composed of matrix substrates, extracellular matrix (ECM), non-malignant cells, and tumor cells. The TME is in constant evolution during the disease progression, most notably through gradual stiffening of the stroma. Within the tumor, increased ECM stiffness drives tumor growth and metastatic events. However, classic in vitro strategies to study the TME in cancer lack the complexity to fully replicate the TME. The quest to understand how the mechanical, geometrical, and biochemical environment of cells impacts their behavior and fate has been a major force driving the recent development of new technologies in cell biology research. Despite rapid advances in this field, many challenges remain in order to bridge the gap between the classical culture dish and the biological reality of actual tissue. Microfabrication coupled with microfluidic approaches aim to engineer the actual complexity of the TME. Moreover, TME bioengineering allows artificial modulations with single or multiple cues to study different phenomena occurring in vivo. Some innovative cutting-edge tools and new microfluidic approaches could have an important impact on the fields of biology and medicine by bringing deeper understanding of the TME, cell behavior, and drug effects.
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Affiliation(s)
- Martial Millet
- CHU de Québec-Université Laval Research Center (Oncology division), Université Laval Cancer Research Center and Faculty of Medicine, Université Laval, Québec, QC G1R 3S3, Canada.
| | - Raoua Ben Messaoud
- CHU de Québec-Université Laval Research Center (Oncology division), Université Laval Cancer Research Center and Faculty of Medicine, Université Laval, Québec, QC G1R 3S3, Canada.
| | - Carole Luthold
- CHU de Québec-Université Laval Research Center (Oncology division), Université Laval Cancer Research Center and Faculty of Medicine, Université Laval, Québec, QC G1R 3S3, Canada.
| | - Francois Bordeleau
- CHU de Québec-Université Laval Research Center (Oncology division), Université Laval Cancer Research Center and Faculty of Medicine, Université Laval, Québec, QC G1R 3S3, Canada.
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13
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Saadatkish N, Nouri Khorasani S, Morshed M, Allafchian AR, Beigi MH, Masoudi Rad M, Esmaeely Neisiany R, Nasr-Esfahani MH. A ternary nanofibrous scaffold potential for central nerve system tissue engineering. J Biomed Mater Res A 2018; 106:2394-2401. [PMID: 29637736 DOI: 10.1002/jbm.a.36431] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2018] [Revised: 03/19/2018] [Accepted: 03/29/2018] [Indexed: 01/13/2023]
Abstract
In the present research, a ternary polycaprolactone (PCL)/gelatin/fibrinogen nanofibrous scaffold for tissue engineering application was developed. Through this combination, PCL improved the scaffold mechanical properties; meanwhile, gelatin and fibrinogen provided more hydrophilicity and cell proliferation. Three types of nanofibrous scaffolds containing different fibrinogen contents were prepared and characterized. Morphological study of the nanofibers showed that the prepared nanofibers were smooth, uniform without any formation of beads with a significant reduction in nanofiber diameter after incorporation of fibrinogen. The chemical characterization of the scaffolds confirmed that no chemical reaction occurred between the scaffold components. The tensile test results of the scaffolds showed that increasing in fibrinogen content led to a decrease in mechanical properties. Furthermore, adipose-derived stem cells were employed to evaluate cell-scaffold interaction. Cell culture results indicated that higher cell proliferation occurred for the higher amount of fibrinogen. Statistical analysis was also carried out to evaluate the significant difference for the obtained results of water droplet contact angle and cell culture. Therefore, the results confirmed that PCL/gel/fibrinogen scaffold has a good potential for tissue engineering applications including central nerve system tissue engineering. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 106A:2394-2401, 2018.
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Affiliation(s)
- Niloufar Saadatkish
- Department of Chemical Engineering, Isfahan University of Technology, Isfahan, 84156-83111, Iran
| | - Saied Nouri Khorasani
- Department of Chemical Engineering, Isfahan University of Technology, Isfahan, 84156-83111, Iran
| | - Mohammad Morshed
- Department of Textile Engineering, Isfahan University of Technology, Isfahan, 84156-83111, Iran
| | - Ali-Reza Allafchian
- Nanotechnology and Advanced Materials, Institute Isfahan University of Technology, Isfahan, 84156-83111, Iran
| | - Mohammad-Hossein Beigi
- Department of Cellular Biotechnology at Cell Science Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
| | - Maryam Masoudi Rad
- Department of Chemical Engineering, Isfahan University of Technology, Isfahan, 84156-83111, Iran
| | - Rasoul Esmaeely Neisiany
- Department of Chemical Engineering, Isfahan University of Technology, Isfahan, 84156-83111, Iran
| | - Mohammad-Hossein Nasr-Esfahani
- Department of Cellular Biotechnology at Cell Science Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
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14
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Fernández-Colino A, Wolf F, Keijdener H, Rütten S, Schmitz-Rode T, Jockenhoevel S, Rodríguez-Cabello JC, Mela P. Macroporous click-elastin-like hydrogels for tissue engineering applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 88:140-147. [PMID: 29636129 DOI: 10.1016/j.msec.2018.03.013] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Revised: 02/15/2018] [Accepted: 03/15/2018] [Indexed: 01/13/2023]
Abstract
Elastin is a key extracellular matrix (ECM) protein that imparts functional elasticity to tissues and therefore an attractive candidate for bioengineering materials. Genetically engineered elastin-like recombinamers (ELRs) maintain inherent properties of the natural elastin (e.g. elastic behavior, bioactivity, low thrombogenicity, inverse temperature transition) while featuring precisely controlled composition, the possibility for biofunctionalization and non-animal origin. Recently the chemical modification of ELRs to enable their crosslinking via a catalyst-free click chemistry reaction, has further widened their applicability for tissue engineering. Despite these outstanding properties, the generation of macroporous click-ELR scaffolds with controlled, interconnected porosity has remained elusive so far. This significantly limits the potential of these materials as the porosity has a crucial role on cell infiltration, proliferation and ECM formation. In this study we propose a strategy to overcome this issue by adapting the salt leaching/gas foaming technique to click-ELRs. As result, macroporous hydrogels with tuned pore size and mechanical properties in the range of many native tissues were reproducibly obtained as demonstrated by rheological measurements and quantitative analysis of fluorescence, scanning electron and two-photon microscopy images. Additionally, the appropriate size and interconnectivity of the pores enabled smooth muscle cells to migrate into the click-ELR scaffolds and deposit extracellular matrix. The macroporous structure together with the elastic performance and bioactive character of ELRs, the specificity and non-toxic character of the catalyst-free click-chemistry reaction, make these scaffolds promising candidates for applications in tissue regeneration. This work expands the potential use of ELRs and click chemistry systems in general in different biomedical fields.
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Affiliation(s)
- Alicia Fernández-Colino
- Department of Biohybrid & Medical Textiles (BioTex) at AME-Institute of Applied Medical Engineering, Helmholtz Institute-CBMS, RWTH Aachen University, Forckenbeckstr. 55, 52074 Aachen, Germany.
| | - Frederic Wolf
- Department of Biohybrid & Medical Textiles (BioTex) at AME-Institute of Applied Medical Engineering, Helmholtz Institute-CBMS, RWTH Aachen University, Forckenbeckstr. 55, 52074 Aachen, Germany
| | - Hans Keijdener
- Department of Biohybrid & Medical Textiles (BioTex) at AME-Institute of Applied Medical Engineering, Helmholtz Institute-CBMS, RWTH Aachen University, Forckenbeckstr. 55, 52074 Aachen, Germany
| | - Stephan Rütten
- Electron Microscopy Facility, Uniklinik RWTH Aachen, Pauwelsstrasse, 30, D-52074 Aachen, Germany
| | - Thomas Schmitz-Rode
- Department of Biohybrid & Medical Textiles (BioTex) at AME-Institute of Applied Medical Engineering, Helmholtz Institute-CBMS, RWTH Aachen University, Forckenbeckstr. 55, 52074 Aachen, Germany
| | - Stefan Jockenhoevel
- Department of Biohybrid & Medical Textiles (BioTex) at AME-Institute of Applied Medical Engineering, Helmholtz Institute-CBMS, RWTH Aachen University, Forckenbeckstr. 55, 52074 Aachen, Germany; AMIBM-Aachen-Maastricht-Institute for Biobased Materials, Maastricht University, Urmonderbaan 22, 6167 RD, Geleen, The Netherlands
| | | | - Petra Mela
- Department of Biohybrid & Medical Textiles (BioTex) at AME-Institute of Applied Medical Engineering, Helmholtz Institute-CBMS, RWTH Aachen University, Forckenbeckstr. 55, 52074 Aachen, Germany.
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15
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Bishop ES, Mostafa S, Pakvasa M, Luu HH, Lee MJ, Wolf JM, Ameer GA, He TC, Reid RR. 3-D bioprinting technologies in tissue engineering and regenerative medicine: Current and future trends. Genes Dis 2017; 4:185-195. [PMID: 29911158 PMCID: PMC6003668 DOI: 10.1016/j.gendis.2017.10.002] [Citation(s) in RCA: 318] [Impact Index Per Article: 45.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Advances in three-dimensional (3D) printing have increased feasibility towards the synthesis of living tissues. Known as 3D bioprinting, this technology involves the precise layering of cells, biologic scaffolds, and growth factors with the goal of creating bioidentical tissue for a variety of uses. Early successes have demonstrated distinct advantages over conventional tissue engineering strategies. Not surprisingly, there are current challenges to address before 3D bioprinting becomes clinically relevant. Here we provide an overview of 3D bioprinting technology and discuss key advances, clinical applications, and current limitations. While 3D bioprinting is a relatively novel tissue engineering strategy, it holds great potential to play a key role in personalized medicine.
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Affiliation(s)
- Elliot S Bishop
- Laboratory of Craniofacial Biology and Development, Section of Plastic and Reconstructive Surgery, Department of Surgery, The University of Chicago Medicine, Chicago, IL 60637, USA.,Molecular Oncology Laboratory, Department of Orthopedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Sami Mostafa
- The University of Chicago Pritzker School of Medicine, Chicago, IL 60637, USA
| | - Mikhail Pakvasa
- The University of Chicago Pritzker School of Medicine, Chicago, IL 60637, USA
| | - Hue H Luu
- Molecular Oncology Laboratory, Department of Orthopedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Michael J Lee
- Molecular Oncology Laboratory, Department of Orthopedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Jennifer Moriatis Wolf
- Molecular Oncology Laboratory, Department of Orthopedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Guillermo A Ameer
- Biomedical Engineering Department, Northwestern University, Evanston, IL 60208, USA.,Department of Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL 60616, USA
| | - Tong-Chuan He
- Molecular Oncology Laboratory, Department of Orthopedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Russell R Reid
- Laboratory of Craniofacial Biology and Development, Section of Plastic and Reconstructive Surgery, Department of Surgery, The University of Chicago Medicine, Chicago, IL 60637, USA
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16
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Iijima M, Aubin H, Steinbrink M, Schiffer F, Assmann A, Weisel RD, Matsui Y, Li RK, Lichtenberg A, Akhyari P. Bioactive coating of decellularized vascular grafts with a temperature-sensitive VEGF-conjugated hydrogel accelerates autologous endothelialization in vivo. J Tissue Eng Regen Med 2017; 12:e513-e522. [DOI: 10.1002/term.2321] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Revised: 07/06/2016] [Accepted: 09/26/2016] [Indexed: 11/12/2022]
Affiliation(s)
- Makoto Iijima
- Department of Cardiovascular Surgery and Research Group for Experimental Surgery; Heinrich Heine University, Medical Faculty; Düsseldorf Germany
| | - Hug Aubin
- Department of Cardiovascular Surgery and Research Group for Experimental Surgery; Heinrich Heine University, Medical Faculty; Düsseldorf Germany
| | - Meike Steinbrink
- Department of Cardiovascular Surgery and Research Group for Experimental Surgery; Heinrich Heine University, Medical Faculty; Düsseldorf Germany
| | - Franziska Schiffer
- Department of Cardiovascular Surgery and Research Group for Experimental Surgery; Heinrich Heine University, Medical Faculty; Düsseldorf Germany
| | - Alexander Assmann
- Department of Cardiovascular Surgery and Research Group for Experimental Surgery; Heinrich Heine University, Medical Faculty; Düsseldorf Germany
| | - Richard D. Weisel
- Toronto General Research Institute, University Health Network and Department of Surgery, Division of Cardiovascular Surgery; University of Toronto; Toronto Ontario Canada
| | - Yoshiro Matsui
- Department of Cardiovascular and Thoracic Surgery; Hokkaido University, Graduate school of Medicine; Sapporo Japan
| | - Ren-Ke Li
- Toronto General Research Institute, University Health Network and Department of Surgery, Division of Cardiovascular Surgery; University of Toronto; Toronto Ontario Canada
| | - Artur Lichtenberg
- Department of Cardiovascular Surgery and Research Group for Experimental Surgery; Heinrich Heine University, Medical Faculty; Düsseldorf Germany
| | - Payam Akhyari
- Department of Cardiovascular Surgery and Research Group for Experimental Surgery; Heinrich Heine University, Medical Faculty; Düsseldorf Germany
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17
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Maschhoff P, Heene S, Lavrentieva A, Hentrop T, Leibold C, Wahalla MN, Stanislawski N, Blume H, Scheper T, Blume C. An intelligent bioreactor system for the cultivation of a bioartificial vascular graft. Eng Life Sci 2016; 17:567-578. [PMID: 32624802 DOI: 10.1002/elsc.201600138] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Revised: 11/18/2016] [Accepted: 11/28/2016] [Indexed: 11/09/2022] Open
Abstract
Cardiovascular disease is the most common cause of death, accounting for 31% of deaths worldwide. As purely synthetic grafts implicate concomitant anticoagulation and autologous veins are rare, tissue-engineered vascular grafts are urgently needed. For successful in vitro cultivation of a bioartificial vascular graft, the suitable bioreactor should provide conditions comparable to vasculogenesis in the body. Such a system has been developed and characterized under continuous and pulsatile flow, and a variety of sensors has been integrated into the bioreactor to control parameters such as temperature, pressure up to 500 mbar, glucose up to 4.5 g/L, lactate, oxygen up to 150 mbar, and flow rate. Wireless data transfer (using the ZigBee specification based on the IEEE 802.15.4 standard) and multiple corresponding sensor signal processing platforms have been implemented as well. Ultrasound is used for touchless monitoring of the growing vascular structure as a quality control before implantation (maximally achieved ultrasound resolution 65 μm at 15 MHz). To withstand the harsh conditions of steam sterilization (120°C for 20 min), all electronics were encapsulated. With such a comprehensive physiologically conditioning, sensing, and imaging bioreactor system, all the requirements for a successful cultivation of vascular grafts are available now.
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Affiliation(s)
- Paul Maschhoff
- Institute of Technical Chemistry Leibniz University Hannover Germany
| | - Sebastian Heene
- Institute of Technical Chemistry Leibniz University Hannover Germany
| | | | - Thorleif Hentrop
- Institute of Technical Chemistry Leibniz University Hannover Germany
| | - Christian Leibold
- Institute for Microelectronic Systems Leibniz University Hannover Germany
| | - Marc-Nils Wahalla
- Institute for Microelectronic Systems Leibniz University Hannover Germany
| | - Nils Stanislawski
- Institute of Technical Chemistry Leibniz University Hannover Germany.,Institute for Microelectronic Systems Leibniz University Hannover Germany
| | - Holger Blume
- Institute for Microelectronic Systems Leibniz University Hannover Germany
| | - Thomas Scheper
- Institute of Technical Chemistry Leibniz University Hannover Germany
| | - Cornelia Blume
- Institute of Technical Chemistry Leibniz University Hannover Germany
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18
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Zhang Y, Yu Y, Akkouch A, Dababneh A, Dolati F, Ozbolat IT. In Vitro Study of Directly Bioprinted Perfusable Vasculature Conduits. Biomater Sci 2016; 3:134-43. [PMID: 25574378 DOI: 10.1039/c4bm00234b] [Citation(s) in RCA: 130] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The ability to create three dimensional (3D) thick tissues is still a major tissue engineering challenge. It requires the development of a suitable vascular supply for an efficient media exchange. An integrated vasculature network is particularly needed when building thick functional tissues and/or organs with high metabolic activities, such as the heart, liver and pancreas. In this work, human umbilical vein smooth muscle cells (HUVSMCs) were encapsulated in sodium alginate and printed in the form of vasculature conduits using a coaxial deposition system. Detailed investigations were performed to understand the dehydration, swelling and degradation characteristics of printed conduits. In addition, because perfusional, permeable and mechanical properties are unique characteristics of natural blood vessels, for printed conduits these properties were also explored in this work. The results show that cells encapsulated in conduits had good proliferation activities and that their viability increased during prolonged in vitro culture. Deposition of smooth muscle matrix and collagen was observed around the peripheral and luminal surface in long-term cultured cellular vascular conduit through histology studies.
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Affiliation(s)
- Yahui Zhang
- Department of Mechanical and Industrial Engineering, The University of Iowa, Iowa City, IA 52242, U.S ; Biomanufacturing Laboratory, 139 Engineering Research Facility, The University of Iowa, Iowa City, IA 52242, U.S
| | - Yin Yu
- Department of Biomedical Engineering, The University of Iowa, Iowa City, IA 52242, U.S ; Biomanufacturing Laboratory, 139 Engineering Research Facility, The University of Iowa, Iowa City, IA 52242, U.S
| | - Adil Akkouch
- Biomanufacturing Laboratory, 139 Engineering Research Facility, The University of Iowa, Iowa City, IA 52242, U.S
| | - Amer Dababneh
- Department of Mechanical and Industrial Engineering, The University of Iowa, Iowa City, IA 52242, U.S ; Biomanufacturing Laboratory, 139 Engineering Research Facility, The University of Iowa, Iowa City, IA 52242, U.S
| | - Farzaneh Dolati
- Department of Mechanical and Industrial Engineering, The University of Iowa, Iowa City, IA 52242, U.S ; Biomanufacturing Laboratory, 139 Engineering Research Facility, The University of Iowa, Iowa City, IA 52242, U.S
| | - Ibrahim T Ozbolat
- Department of Mechanical and Industrial Engineering, The University of Iowa, Iowa City, IA 52242, U.S ; Biomanufacturing Laboratory, 139 Engineering Research Facility, The University of Iowa, Iowa City, IA 52242, U.S
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19
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Rothuizen TC, Kemp R, Duijs JM, de Boer HC, Bijkerk R, van der Veer EP, Moroni L, van Zonneveld AJ, Weiss AS, Rabelink TJ, Rotmans JI. Promoting Tropoelastin Expression in Arterial and Venous Vascular Smooth Muscle Cells and Fibroblasts for Vascular Tissue Engineering. Tissue Eng Part C Methods 2016; 22:923-931. [DOI: 10.1089/ten.tec.2016.0173] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Tonia C. Rothuizen
- Department of Internal Medicine, Section Nephrology and Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, The Netherlands
| | - Raymond Kemp
- Department of Internal Medicine, Section Nephrology and Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, The Netherlands
| | - Jacques M.G.J. Duijs
- Department of Internal Medicine, Section Nephrology and Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, The Netherlands
| | - Hetty C. de Boer
- Department of Internal Medicine, Section Nephrology and Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, The Netherlands
| | - Roel Bijkerk
- Department of Internal Medicine, Section Nephrology and Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, The Netherlands
| | - Eric P. van der Veer
- Department of Internal Medicine, Section Nephrology and Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, The Netherlands
| | - Lorenzo Moroni
- MERLN Institute for Technology Inspired Regenerative Medicine, Complex Tissue Regeneration, Maastricht University, Maastricht, The Netherlands
| | - Anton Jan van Zonneveld
- Department of Internal Medicine, Section Nephrology and Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, The Netherlands
| | - Anthony S. Weiss
- School of Molecular Bioscience, Charles Perkins Centre, Bosch Institute, The University of Sydney, Sydney, Australia
| | - Ton J. Rabelink
- Department of Internal Medicine, Section Nephrology and Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, The Netherlands
| | - Joris I. Rotmans
- Department of Internal Medicine, Section Nephrology and Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, The Netherlands
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20
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Wu S, Duan B, Liu P, Zhang C, Qin X, Butcher JT. Fabrication of Aligned Nanofiber Polymer Yarn Networks for Anisotropic Soft Tissue Scaffolds. ACS APPLIED MATERIALS & INTERFACES 2016; 8:16950-60. [PMID: 27304080 DOI: 10.1021/acsami.6b05199] [Citation(s) in RCA: 75] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Nanofibrous scaffolds with defined architectures and anisotropic mechanical properties are attractive for many tissue engineering and regenerative medicine applications. Here, a novel electrospinning system is developed and implemented to fabricate continuous processable uniaxially aligned nanofiber yarns (UANY). UANY were processed into fibrous tissue scaffolds with defined anisotropic material properties using various textile-forming technologies, i.e., braiding, weaving, and knitting techniques. UANY braiding dramatically increased overall stiffness and strength compared to the same number of UANY unbraided. Human adipose derived stem cells (HADSC) cultured on UANY or woven and knitted 3D scaffolds aligned along local fiber direction and were >90% viable throughout 21 days. Importantly, UANY supported biochemical induction of HADSC differentiation toward smooth muscle and osteogenic lineages. Moreover, we integrated an anisotropic woven fiber mesh within a bioactive hydrogel to mimic the complex microstructure and mechanical behavior of valve tissues. Human aortic valve interstitial cells (HAVIC) and human aortic root smooth muscle cells (HASMC) were separately encapsulated within hydrogel/woven fabric composite scaffolds for generating scaffolds with anisotropic biomechanics and valve ECM like microenvironment for heart valve tissue engineering. UANY have great potential as building blocks for generating fiber-shaped tissues or tissue microstructures with complex architectures.
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Affiliation(s)
- Shaohua Wu
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University , No. 2999 North Renmin Road, Songjiang, Shanghai 201620, China
- Department of Biomedical Engineering, Cornell University , Ithaca, New York 14850, United States
| | - Bin Duan
- Department of Biomedical Engineering, Cornell University , Ithaca, New York 14850, United States
| | - Penghong Liu
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University , No. 2999 North Renmin Road, Songjiang, Shanghai 201620, China
| | - Caidan Zhang
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University , No. 2999 North Renmin Road, Songjiang, Shanghai 201620, China
| | - Xiaohong Qin
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University , No. 2999 North Renmin Road, Songjiang, Shanghai 201620, China
- Key Laboratory of Shanghai Micro & Nano Technology , Shanghai 201620, China
| | - Jonathan T Butcher
- Department of Biomedical Engineering, Cornell University , Ithaca, New York 14850, United States
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21
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Thiebes AL, Reddemann MA, Palmer J, Kneer R, Jockenhoevel S, Cornelissen CG. Flexible Endoscopic Spray Application of Respiratory Epithelial Cells as Platform Technology to Apply Cells in Tubular Organs. Tissue Eng Part C Methods 2016; 22:322-31. [PMID: 26739252 PMCID: PMC4827297 DOI: 10.1089/ten.tec.2015.0381] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Introduction: Inoperable airway stenoses are currently treated by placing stents. A major problem of covered stents is missing mucociliary clearance, which is caused by covering the native respiratory epithelium. By coating a stent with respiratory epithelium, this problem can be overcome. However, no methods are available for efficient endoscopic cell seeding. Methods: We designed a flexible endoscopic spraying device based on a bronchoscope and tested it with respiratory epithelial cells. With this device cells can also be applied in a thin layer of fibrin glue. We evaluated the survival rate directly after spray application with a live-dead staining and the long-term differentiation capacity with histology and electron microscopy. Furthermore, the random distribution of cells when applied in a tube was analyzed and the macroscopic and microscopic characteristics of the endoscopic spray were investigated using high-speed visualization. Results: Spray visualization revealed a polydisperse character of the spray with the majority of droplets larger than epithelial cells. Spray application does not influence the survival rate and differentiation of respiratory epithelial cells. After 4 weeks, cells built up a pseudostratified epithelial layer with cilia and goblet cells. When cells are applied in a thin layer of fibrin gel into a tube, a nearest neighbor index of 1.2 is obtained, which suggests a random distribution of the cells. Conclusions: This spraying device is a promising tool for application of various cell types onto stents or implants with high survival rates and homogeneous distribution as shown in this study for ovine respiratory epithelial cells. The system could also be used for cell therapy to locally apply cells to the diseased parts of hollow organs. For the first time, the fluid dynamics of a spray device for cells were examined to validate in vitro results.
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Affiliation(s)
- Anja Lena Thiebes
- 1 Department of Tissue Engineering and Textile Implants, Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University , Aachen, Germany
| | | | - Johannes Palmer
- 2 Institute of Heat and Mass Transfer, RWTH Aachen University , Aachen, Germany
| | - Reinhold Kneer
- 2 Institute of Heat and Mass Transfer, RWTH Aachen University , Aachen, Germany
| | - Stefan Jockenhoevel
- 1 Department of Tissue Engineering and Textile Implants, Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University , Aachen, Germany .,3 Aachen-Maastricht Institute for Biobased Materials, Maastricht University at Chemelot Campus , Geleen, The Netherlands
| | - Christian Gabriel Cornelissen
- 1 Department of Tissue Engineering and Textile Implants, Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University , Aachen, Germany .,4 Section for Pneumology, Department for Internal Medicine, RWTH Aachen University , Aachen, Germany
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22
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Vascular Prostheses Based on Nanofibers from Aliphatic Copolyamide. Cardiovasc Eng Technol 2016; 7:78-86. [PMID: 26721466 DOI: 10.1007/s13239-015-0234-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/24/2015] [Accepted: 07/06/2015] [Indexed: 10/22/2022]
Abstract
Tubular grafts based on nanofibers of copolymer of ε-caprolactam and hexamethylendiaminadipate were obtained by the electrospinning method. The strength of materials based on the dry nanofibers was 6.2 MPa with elongation at break of 133%, or 7.5 MPa and 299% in saline, respectively. The pressure value at which liquid started seeping through the tube wall was P = 10 kPa. Absence of cytotoxicity was proved, as well as adhesion and proliferation of mesenchymal stem cells on the surface. Tubes with inner diameter of 1 mm were tested in vivo in rat abdominal aorta. A layer of endothelial cells was shown to form on the inner side of the prosthesis after 30 days. There was no evidence of stenosis or dilatation of the prosthesis after 14 months with observation of endothelial and subendothelial layers.
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23
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Schneider-Barthold C, Baganz S, Wilhelmi M, Scheper T, Pepelanova I. Hydrogels based on collagen and fibrin – frontiers and applications. ACTA ACUST UNITED AC 2016. [DOI: 10.1515/bnm-2015-0025] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
AbstractHydrogels are a versatile tool for a multitude of applications in biomedical research and clinical practice. Especially collagen and fibrin hydrogels are distinguished by their excellent biocompatibility, natural capacity for cell adhesion and low immunogenicity. In many ways, collagen and fibrin represent an ideal biomaterial, as they can serve as a scaffold for tissue regeneration and promote the migration of cells, as well as the ingrowth of tissues. On the other hand, pure collagen and fibrin materials are marked by poor mechanical properties and rapid degradation, which limits their use in practice. This paper will review methods of modification of natural collagen and fibrin materials to next-generation materials with enhanced stability. A special focus is placed on biomedical products from fibrin and collagen already on the market. In addition, recent research on the in vivo applications of collagen and fibrin-based materials will be showcased.
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24
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ENDOXY - Development of a Biomimetic Oxygenator-Test-Device. PLoS One 2015; 10:e0142961. [PMID: 26682907 PMCID: PMC4684320 DOI: 10.1371/journal.pone.0142961] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2013] [Accepted: 10/29/2015] [Indexed: 12/03/2022] Open
Abstract
Objective This study focusses on the development of a biomimetic oxygenator test device. Due to limited biocompatibility, current oxygenators do not allow mid- to long-term therapy. Tissue engineering uses autologous cell sources to overcome the immunogenic barriers of biomaterials. Surface coating with endothelial cells might improve hemocompatibility and thus prevent immunogenic reactions of the body. In this study this concept is applied to endothelialise a gas-permeable membrane to develop a biomimetic oxygenator test-device (ENDOXY). Methods ENDOXY—a multifunctional test-system was developed to endothelialise a gas-permeable membrane suitable for cell culture and to test the cell retention under shear stress and to measure gas transfer through it. Results Successful endothelialisation of the membrane was achieved and cells showed characteristic endothelial morphologies. They stained positive for endothelial markers. The number of cells aligned with shear stress and cell retention after blood perfusing experiments was high. Gas transfer is observed via uncoated and endothelialised membranes. Conclusion The study showed promising results with regard to system design, endothelialisation, and cell retention under shear stress conditions. It strongly encourages further research into the system by testing different membrane materials to design a biomimetic membrane surface and pave way for a fully hemocompatible oxygenator.
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Pashneh-Tala S, MacNeil S, Claeyssens F. The Tissue-Engineered Vascular Graft-Past, Present, and Future. TISSUE ENGINEERING PART B-REVIEWS 2015; 22:68-100. [PMID: 26447530 PMCID: PMC4753638 DOI: 10.1089/ten.teb.2015.0100] [Citation(s) in RCA: 451] [Impact Index Per Article: 50.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Cardiovascular disease is the leading cause of death worldwide, with this trend predicted to continue for the foreseeable future. Common disorders are associated with the stenosis or occlusion of blood vessels. The preferred treatment for the long-term revascularization of occluded vessels is surgery utilizing vascular grafts, such as coronary artery bypass grafting and peripheral artery bypass grafting. Currently, autologous vessels such as the saphenous vein and internal thoracic artery represent the gold standard grafts for small-diameter vessels (<6 mm), outperforming synthetic alternatives. However, these vessels are of limited availability, require invasive harvest, and are often unsuitable for use. To address this, the development of a tissue-engineered vascular graft (TEVG) has been rigorously pursued. This article reviews the current state of the art of TEVGs. The various approaches being explored to generate TEVGs are described, including scaffold-based methods (using synthetic and natural polymers), the use of decellularized natural matrices, and tissue self-assembly processes, with the results of various in vivo studies, including clinical trials, highlighted. A discussion of the key areas for further investigation, including graft cell source, mechanical properties, hemodynamics, integration, and assessment in animal models, is then presented.
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Affiliation(s)
- Samand Pashneh-Tala
- Department of Materials Science and Engineering, Kroto Research Institute, University of Sheffield , Broad Lane, Sheffield, United Kingdom
| | - Sheila MacNeil
- Department of Materials Science and Engineering, Kroto Research Institute, University of Sheffield , Broad Lane, Sheffield, United Kingdom
| | - Frederik Claeyssens
- Department of Materials Science and Engineering, Kroto Research Institute, University of Sheffield , Broad Lane, Sheffield, United Kingdom
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Ryan AJ, O'Brien FJ. Insoluble elastin reduces collagen scaffold stiffness, improves viscoelastic properties, and induces a contractile phenotype in smooth muscle cells. Biomaterials 2015; 73:296-307. [PMID: 26431909 DOI: 10.1016/j.biomaterials.2015.09.003] [Citation(s) in RCA: 86] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2015] [Revised: 09/03/2015] [Accepted: 09/09/2015] [Indexed: 12/23/2022]
Abstract
Biomaterials with the capacity to innately guide cell behaviour while also displaying suitable mechanical properties remain a challenge in tissue engineering. Our approach to this has been to utilise insoluble elastin in combination with collagen as the basis of a biomimetic scaffold for cardiovascular tissue engineering. Elastin was found to markedly alter the mechanical and biological response of these collagen-based scaffolds. Specifically, during extensive mechanical assessment elastin was found to reduce the specific tensile and compressive moduli of the scaffolds in a concentration dependant manner while having minimal effect on scaffold microarchitecture with both scaffold porosity and pore size still within the ideal ranges for tissue engineering applications. However, the viscoelastic properties were significantly improved with elastin addition with a 3.5-fold decrease in induced creep strain, a 6-fold increase in cyclical strain recovery, and with a four-parameter viscoelastic model confirming the ability of elastin to confer resistance to long term deformation/creep. Furthermore, elastin was found to result in the modulation of SMC phenotype towards a contractile state which was determined via reduced proliferation and significantly enhanced expression of early (α-SMA), mid (calponin), and late stage (SM-MHC) contractile proteins. This allows the ability to utilise extracellular matrix proteins alone to modulate SMC phenotype without any exogenous factors added. Taken together, the ability of elastin to alter the mechanical and biological response of collagen scaffolds has led to the development of a biomimetic biomaterial highly suitable for cardiovascular tissue engineering.
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Affiliation(s)
- Alan J Ryan
- Tissue Engineering Research Group, Department of Anatomy, Royal College of Surgeons in Ireland, 123 St Stephens Green, Dublin 2, Ireland; Trinity Centre for Bioengineering, Trinity Biomedical Sciences Institute, 152-160 Pearse Street, Trinity College Dublin, Dublin 2, Ireland; Advanced Materials and Bioengineering Research (AMBER) Centre, Royal College of Surgeons in Ireland and Trinity College Dublin, Dublin, Ireland
| | - Fergal J O'Brien
- Tissue Engineering Research Group, Department of Anatomy, Royal College of Surgeons in Ireland, 123 St Stephens Green, Dublin 2, Ireland; Trinity Centre for Bioengineering, Trinity Biomedical Sciences Institute, 152-160 Pearse Street, Trinity College Dublin, Dublin 2, Ireland; Advanced Materials and Bioengineering Research (AMBER) Centre, Royal College of Surgeons in Ireland and Trinity College Dublin, Dublin, Ireland.
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Cyclic Stretch and Perfusion Bioreactor for Conditioning Large Diameter Engineered Tissue Tubes. Ann Biomed Eng 2015; 44:1785-97. [PMID: 26307332 DOI: 10.1007/s10439-015-1437-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Accepted: 08/19/2015] [Indexed: 01/19/2023]
Abstract
A cyclic stretch and perfusion bioreactor was designed to culture large diameter engineered tissue tubes for heart valve applications. In this bioreactor, tubular tissues consisting of dermal fibroblasts in a sacrificial fibrin gel scaffold were placed over porated latex support sleeves and mounted in a custom bioreactor. Pulsatile flow of culture medium into the system resulted in cyclic stretching as well as ablumenal, lumenal, and transmural flow (perfusion). In this study, lumenal remodeling, composition, and mechanical strength and stiffness were compared for tissues cyclically stretched in this bioreactor on either the porated latex sleeves or solid latex sleeves, which did not permit lumenal or transmural flow. Tissues cyclically stretched on porated sleeves had regions of increased lumenal remodeling and cellularity that were localized to the columns of pores in the latex sleeve. A CFD model was developed with COMSOL Multiphysics(®) to predict flow of culture medium in and around the tissue, and the predictions suggest that the enhanced lumenal remodeling was likely a result of elevated shear stresses and transmural velocity in these regions. This work highlights the beneficial effects of increased nutrient transport and flow stimulation for accelerating in vitro tissue remodeling.
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Thiebes AL, Albers S, Klopsch C, Jockenhoevel S, Cornelissen CG. Spraying Respiratory Epithelial Cells to Coat Tissue-Engineered Constructs. Biores Open Access 2015; 4:278-87. [PMID: 26309803 PMCID: PMC4497665 DOI: 10.1089/biores.2015.0015] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Applying cells in a spray can overcome current hurdles in coating tissue engineered constructs with a thin layer of endo- or epithelial cells. We report here a structured study on the influences of spray application with a medical spray device on vascular smooth muscle cells (vSMCs) and respiratory epithelial cells (RECs) with and without fibrin gel. Next to viability and cytotoxicity assays, the in vitro differentiation capacity after spray processing was analyzed. For vSMC, no influence of air pressures till 0.8 bar could be shown, whereas the viability decreased for higher pressures. The viability of RECs was reduced to 88.5% with 0.4 bar air pressure. Lactate dehydrogenase-levels in the culture medium increased the first day after spraying but normalized afterward. In the short term, no differences by means of morphology and expression-specific markers for vSMCs and RECs were seen between the control and study group. In addition, in a long-term study for 28 days with the air–liquid interface, RECs differentiated and built up an organized epithelial layer with ciliary development that was comparable to the control for cells sprayed without fibrin gel. When spraying within fibrin gel, ciliary development was lower at 28 days. Thus, spraying of vSMCs and RECs was proved to be a suitable method for tissue engineering. Especially for RECs, this application is of special significance when coating luminal structures or other unfavorable topographies.
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Affiliation(s)
- Anja Lena Thiebes
- Department of Tissue Engineering and Textile Implants, Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University , Aachen, Germany
| | - Stefanie Albers
- Department of Tissue Engineering and Textile Implants, Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University , Aachen, Germany
| | - Christian Klopsch
- Clinic and Policlinic for Cardiac Surgery, University of Rostock , Rostock, Germany
| | - Stefan Jockenhoevel
- Department of Tissue Engineering and Textile Implants, Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University , Aachen, Germany . ; Aachen-Maastricht Institute for Biobased Materials, Maastricht University at Chemelot Campus , Geleen, The Netherlands
| | - Christian G Cornelissen
- Department of Tissue Engineering and Textile Implants, Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University , Aachen, Germany . ; Section for Pneumology, Department for Internal Medicine, Medical Faculty, RWTH Aachen University , Aachen, Germany
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Böer U, Hurtado-Aguilar LG, Klingenberg M, Lau S, Jockenhoevel S, Haverich A, Wilhelmi M. Effect of Intensified Decellularization of Equine Carotid Arteries on Scaffold Biomechanics and Cytotoxicity. Ann Biomed Eng 2015; 43:2630-41. [PMID: 25921001 DOI: 10.1007/s10439-015-1328-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Accepted: 04/20/2015] [Indexed: 12/26/2022]
Abstract
Decellularized equine carotid arteries (dEAC) are suggested to represent an alternative for alloplastic vascular grafts in haemodialysis patients to achieve vascular access. Recently it was shown that intensified detergent treatment completely removed cellular components from dEAC and thereby significantly reduced matrix immunogenicity. However, detergents may also affect matrix composition and stability and render scaffolds cytotoxic. Therefore, intensively decellularized carotids (int-dEAC) were now evaluated for their biomechanical characteristics (suture retention strength, burst pressure and circumferential compliance at arterial and venous systolic and diastolic pressure), matrix components (collagen and glycosaminoglycan content) and indirect and direct cytotoxicity (WST-8 assay and endothelial cell seeding) and compared with native (n-EAC) and conventionally decellularized carotids (con-dEAC). Both decellularization protocols comparably reduced matrix compliance (venous pressure compliance: 32.2 and 27.4% of n-EAC; p < 0.01 and arterial pressure compliance: 26.8 and 23.7% of n-EAC, p < 0.01) but had no effect on suture retention strength and burst pressure. Matrix characterization revealed unchanged collagen contents but a 39.0% (con-dEAC) and 26.4% (int-dEAC, p < 0.01) reduction of glycosaminoglycans, respectively. Cytotoxicity was not observed in either dEAC matrix which was also displayed by an intact endothelial lining after seeding. Thus, even intensified decellularization generates matrix scaffolds highly suitable for vascular tissue engineering purposes, e.g., the generation of haemodialysis shunts.
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Affiliation(s)
- Ulrike Böer
- GMP-Model Laboratory for Tissue Engineering, Feodor-Lynen-Str. 31, 30625, Hannover, Germany.
- Division for Cardiac-, Thoracic-, Transplantation- and Vascular Surgery, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany.
| | - Luis G Hurtado-Aguilar
- Department of Tissue Engineering and Textile Implants, AME - Institute of Applied Medical Engineering, Helmholtz Institute, Pauwelsstr. 20, 52074, Aachen, Germany
| | - Melanie Klingenberg
- GMP-Model Laboratory for Tissue Engineering, Feodor-Lynen-Str. 31, 30625, Hannover, Germany
- Division for Cardiac-, Thoracic-, Transplantation- and Vascular Surgery, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany
| | - Skadi Lau
- GMP-Model Laboratory for Tissue Engineering, Feodor-Lynen-Str. 31, 30625, Hannover, Germany
- Division for Cardiac-, Thoracic-, Transplantation- and Vascular Surgery, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany
| | - Stefan Jockenhoevel
- Department of Tissue Engineering and Textile Implants, AME - Institute of Applied Medical Engineering, Helmholtz Institute, Pauwelsstr. 20, 52074, Aachen, Germany
| | - Axel Haverich
- GMP-Model Laboratory for Tissue Engineering, Feodor-Lynen-Str. 31, 30625, Hannover, Germany
- Division for Cardiac-, Thoracic-, Transplantation- and Vascular Surgery, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany
| | - Mathias Wilhelmi
- GMP-Model Laboratory for Tissue Engineering, Feodor-Lynen-Str. 31, 30625, Hannover, Germany
- Division for Cardiac-, Thoracic-, Transplantation- and Vascular Surgery, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany
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Seifarth V, Gossmann M, Janke HP, Grosse JO, Becker C, Heschel I, Artmann GM, Temiz Artmann A. Development of a Bioreactor to Culture Tissue Engineered Ureters Based on the Application of Tubular OPTIMAIX 3D Scaffolds. Urol Int 2015; 95:106-13. [DOI: 10.1159/000368419] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2014] [Accepted: 09/16/2014] [Indexed: 11/19/2022]
Abstract
Regenerative medicine, tissue engineering and biomedical research give hope to many patients who need bio-implants. Tissue engineering applications have already been developed based on bioreactors. Physiological ureter implants, however, do not still function sufficiently, as they represent tubular hollow structures with very specific cellular structures and alignments consisting of several cell types. The aim of this study was to a develop a new bioreactor system based on seamless, collagenous, tubular OPTIMAIX 3D prototype sponge as scaffold material for ex-vivo culturing of a tissue engineered ureter replacement for future urological applications. Particular emphasis was given to a great extent to mimic the physiological environment similar to the in vivo situation of a ureter. NIH-3T3 fibroblasts, C2C12, Urotsa and primary genitourinary tract cells were applied as co-cultures on the scaffold and the penetration of cells into the collagenous material was followed. By the end of this study, the bioreactor was functioning, physiological parameter as temperature and pH and the newly developed BIOREACTOR system is applicable to tubular scaffold materials with different lengths and diameters. The automatized incubation system worked reliably. The tubular OPTIMAIX 3D sponge was a suitable scaffold material for tissue engineering purposes and co-cultivation procedures.
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Mertens ME, Frese J, Bölükbas DA, Hrdlicka L, Golombek S, Koch S, Mela P, Jockenhövel S, Kiessling F, Lammers T. FMN-coated fluorescent USPIO for cell labeling and non-invasive MR imaging in tissue engineering. Theranostics 2014; 4:1002-13. [PMID: 25157279 PMCID: PMC4142292 DOI: 10.7150/thno.8763] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Accepted: 03/24/2014] [Indexed: 12/26/2022] Open
Abstract
Non-invasive magnetic resonance imaging (MRI) is gaining significant attention in the field of tissue engineering, since it can provide valuable information on in vitro production parameters and in vivo performance. It can e.g. be used to monitor the morphology, location and function of the regenerated tissue, the integrity, remodeling and resorption of the scaffold, and the fate of the implanted cells. Since cells are not visible using conventional MR techniques, ultrasmall superparamagnetic iron oxide (USPIO) nanoparticles are routinely employed to label and monitor the cells embedded in tissue-engineered implants. We here set out to optimize cell labeling procedures with regard to labeling efficiency, biocompatibility and in vitro validation during bioreactor cultivation, using flavin mononucleotide (FMN)-coated fluorescent USPIO (FLUSPIO). Efficient FLUSPIO uptake is demonstrated in three different cell lines, applying relatively short incubation times and low labeling concentrations. FLUSPIO-labeled cells were successfully employed to visualize collagen scaffolds and tissue-engineered vascular grafts. Besides promoting safe and efficient cell uptake, an exquisite property of the non-polymeric FMN-coating is that it renders the USPIO fluorescent, providing a means for in vitro, in vivo and ex vivo validation via fluorescence microscopy and fluorescence reflectance imaging (FRI). FLUSPIO cell labeling is consequently considered to be a suitable tool for theranostic tissue engineering purposes.
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Lueders C, Jastram B, Hetzer R, Schwandt H. Rapid manufacturing techniques for the tissue engineering of human heart valves. Eur J Cardiothorac Surg 2014; 46:593-601. [PMID: 25063052 DOI: 10.1093/ejcts/ezt510] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Three-dimensional (3D) printing technologies have reached a level of quality that justifies considering rapid manufacturing for medical applications. Herein, we introduce a new approach using 3D printing to simplify and improve the fabrication of human heart valve scaffolds by tissue engineering (TE). Custom-made human heart valve scaffolds are to be fabricated on a selective laser-sintering 3D printer for subsequent seeding with vascular cells from human umbilical cords. The scaffolds will be produced from resorbable polymers that must feature a number of specific properties: the structure, i.e. particle granularity and shape, and thermic properties must be feasible for the printing process. They must be suitable for the cell-seeding process and at the same time should be resorbable. They must be applicable for implementation in the human body and flexible enough to support the full functionality of the valve. The research focuses mainly on the search for a suitable scaffold material that allows the implementation of both the printing process to produce the scaffolds and the cell-seeding process, while meeting all of the above requirements. Computer tomographic data from patients were transformed into a 3D data model suitable for the 3D printer. Our current activities involve various aspects of the printing process, material research and the implementation of the cell-seeding process. Different resorbable polymeric materials have been examined and used to fabricate heart valve scaffolds by rapid manufacturing. Human vascular cells attached to the scaffold surface should migrate additionally into the inner structure of the polymeric samples. The ultimate intention of our approach is to establish a heart valve fabrication process based on 3D rapid manufacturing and TE. Based on the computer tomographic data of a patient, a custom-made scaffold for a valve will be produced on a 3D printer and populated preferably by autologous cells. The long-term goal is to support the growth of a new valve by a 3D structure resorbed by the human body in the course of the growth process. Our current activities can be characterized as basic research in which the fundamental steps of the technical process and its feasibility are investigated.
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Affiliation(s)
- Cora Lueders
- Deutsches Herzzentrum Berlin, Laboratory for Tissue Engineering, Berlin, Germany
| | - Ben Jastram
- Faculty of Mathematics and Natural Sciences, 3D Laboratory, Institute of Mathematics, MA 6-4, Technical University of Berlin, Berlin, Germany
| | - Roland Hetzer
- Deutsches Herzzentrum Berlin, Laboratory for Tissue Engineering, Berlin, Germany
| | - Hartmut Schwandt
- Faculty of Mathematics and Natural Sciences, 3D Laboratory, Institute of Mathematics, MA 6-4, Technical University of Berlin, Berlin, Germany
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Woods I, Flanagan TC. Electrospinning of biomimetic scaffolds for tissue-engineered vascular grafts: threading the path. Expert Rev Cardiovasc Ther 2014; 12:815-32. [PMID: 24903895 DOI: 10.1586/14779072.2014.925397] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Tissue-engineered vascular grafts (TEVGs) offer an alternative to synthetic grafts for the surgical treatment of atherosclerosis and congenital heart defects, and may improve graft patency and patient outcomes after implantation. Electrospinning is a versatile manufacturing process for the production of fibrous scaffolds. This review aims to investigate novel approaches undertaken to improve the design of electrospun scaffolds for TEVG development. The review describes how electrospinning can be adapted to produce aligned nanofibrous scaffolds used in vascular tissue engineering, while novel processes for improved performance of such scaffolds are examined and compared to evaluate their effectiveness and potential. By highlighting new drug delivery techniques and porogenic technologies, in addition to analyzing in vitro and in vivo testing of electrospun TEVGs, it is hoped that this review will provide guidance on how the next generation of electrospun vascular graft scaffolds will be designed and tested for the potential improvement of cardiovascular therapies.
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Affiliation(s)
- Ian Woods
- School of Medicine & Medical Science, Health Sciences Centre, University College Dublin, Belfield, Dublin 4, Ireland
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Ellä V, Annala T, Länsman S, Nurminen M, Kellomäki M. Knitted polylactide 96/4 L/D structures and scaffolds for tissue engineering: shelf life, in vitro and in vivo studies. BIOMATTER 2014; 1:102-13. [PMID: 23507732 PMCID: PMC3548249 DOI: 10.4161/biom.1.1.17447] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
This study covers the whole production cycle, from biodegradable polymer processing to an in vivo tissue engineered construct. Six different biodegradable polylactide 96/4 L/D single jersey knits were manufactured using either four or eight multifilament fiber batches. The properties of those were studied in vitro for 42 weeks and in 0- to 3-year shelf life studies. Three types (Ø 12, 15 and 19 mm) of cylindrical scaffolds were manufactured from the knit, and the properties of those were studied in vitro for 48 weeks. For the Ø 15 mm scaffold type, mechanical properties were also studied in a one-year in vivo experiment. The scaffolds were implanted in the rat subcutis. All the scaffolds were γ-irradiated prior to the studies. In vitro, all the knits lost 99% of their mechanical strength in 30 weeks. In the three-year follow up of shelf life properties, there was no decrease in the mechanical properties due to the storage time and only a 12% decrease in molecular weight. The in vitro and in vivo scaffolds lost their mechanical properties after 1 week. In the case of the in vivo samples, the mechanical properties were restored again, stepwise, by the presence of growing/maturing tissue between weeks 3 and 12. Faster degradation was observed with in vitro scaffolds compared to in vivo scaffolds during the one-year follow up.
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Affiliation(s)
- Ville Ellä
- Department of Biomedical Engineering, Tampere University of Technology, Tampere, Finland.
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Blood outgrowth endothelial cells alter remodeling of completely biological engineered grafts implanted into the sheep femoral artery. J Cardiovasc Transl Res 2014; 7:242-9. [PMID: 24429838 DOI: 10.1007/s12265-013-9539-z] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2013] [Accepted: 12/20/2013] [Indexed: 12/26/2022]
Abstract
Hemocompatibility of tissue-engineered vascular grafts remains a major hurdle to clinical utility for small-diameter grafts. Here we assessed the feasibility of using autologous blood outgrowth endothelial cells to create an endothelium via lumenal seeding on completely biological, decellularized engineered allografts prior to implantation in the sheep femoral artery. The 4-mm-diameter, 2- to 3-cm-long grafts were fabricated from fibrin gel remodeled into an aligned tissue tube in vitro by ovine dermal fibroblasts prior to decellularization. Decellularized grafts pre-seeded with blood outgrowth endothelial cells (n = 3) retained unprecedented (>95 %) monolayer coverage 1 h post-implantation and had greater endothelial coverage, smaller wall thickness, and more basement membrane after 9-week implantation, including a final week without anti-coagulation therapy, compared with contralateral non-seeded controls. These results support the use of autologous blood outgrowth endothelial cells as a viable source of endothelial cells for creating an endothelium with biological function on decellularized engineered allografts made from fibroblast-remodeled fibrin.
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Wilhelmi M, Jockenhoevel S, Mela P. Bioartificial fabrication of regenerating blood vessel substitutes: requirements and current strategies. ACTA ACUST UNITED AC 2014; 59:185-95. [DOI: 10.1515/bmt-2013-0112] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2013] [Accepted: 02/03/2014] [Indexed: 11/15/2022]
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Abstract
The development of vascular bioengineering has led to a variety of novel treatment strategies for patients with cardiovascular disease. Notably, combining biodegradable scaffolds with autologous cell seeding to create tissue-engineered vascular grafts (TEVG) allows for in situ formation of organized neovascular tissue and we have demonstrated the clinical viability of this technique in patients with congenital heart defects. The role of the scaffold is to provide a temporary 3-dimensional structure for cells, but applying TEVG strategy to the arterial system requires scaffolds that can also endure arterial pressure. Both biodegradable synthetic polymers and extracellular matrix-based natural materials can be used to generate arterial scaffolds that satisfy these requirements. Furthermore, the role of specific cell types in tissue remodeling is crucial and as a result many different cell sources, from matured somatic cells to stem cells, are now used in a variety of arterial TEVG techniques. However, despite great progress in the field over the past decade, clinical effectiveness of small-diameter arterial TEVG (<6mm) has remained elusive. To achieve successful translation of this complex multidisciplinary technology to the clinic, active participation of biologists, engineers, and clinicians is required.
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Kroustalli A, Zisimopoulou AE, Koch S, Rongen L, Deligianni D, Diamantouros S, Athanassiou G, Kokozidou M, Mavrilas D, Jockenhoevel S. Carbon nanotubes reinforced chitosan films: mechanical properties and cell response of a novel biomaterial for cardiovascular tissue engineering. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2013; 24:2889-2896. [PMID: 23979364 DOI: 10.1007/s10856-013-5029-8] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2013] [Accepted: 08/12/2013] [Indexed: 06/02/2023]
Abstract
Carbon nanotubes have been proposed as fillers to reinforce polymeric biomaterials for the strengthening of their structural integrity to achieve better biomechanical properties. In this study, a new polymeric composite material was introduced by incorporating various low concentrations of multiwalled carbon nanotubes (MWCNTs) into chitosan (CS), aiming at achieving a novel composite biomaterial with superior mechanical and biological properties compared to neat CS, in order to be used in cardiovascular tissue engineering applications. Both mechanical and biological characteristics in contact with the two relevant cell types (endothelial cells and vascular myofibroblasts) were studied. Regarding the mechanical behavior of MWCNT reinforced CS (MWCNT/CS), 5 and 10 % concentrations of MWCNTs enhanced the mechanical behavior of CS, with that of 5 % exhibiting a superior mechanical strength compared to 10 % concentration and neat CS. Regarding biological properties, MWCNT/CS best supported proliferation of endothelial and myofibroblast cells, MWCNTs and MWCNT/CS caused no apoptosis and were not toxic of the examined cell types. Conclusively, the new material could be suitable for tissue engineering (TE) and particularly for cardiovascular TE applications.
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Affiliation(s)
- A Kroustalli
- Laboratory of Biomechanics and Biomedical Engineering, Department of Mechanical Engineering & Aeronautics, University of Patras, Patras, Greece
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Fayol D, Le Visage C, Ino J, Gazeau F, Letourneur D, Wilhelm C. Design of Biomimetic Vascular Grafts with Magnetic Endothelial Patterning. Cell Transplant 2013; 22:2105-18. [DOI: 10.3727/096368912x661300] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
The development of small diameter vascular grafts with a controlled pluricellular organization is still needed for effective vascular tissue engineering. Here, we describe a technological approach combining a tubular scaffold and magnetically labeled cells to create a pluricellular and organized vascular graft, the endothelialization of which could be monitored by MRI prior to transplantation. A novel type of scaffold was developed with a tubular geometry and a porous bulk structure enabling the seeding of cells in the scaffold pores. A homogeneous distribution of human mesenchymal stem cells in the macroporous structure was obtained by seeding the freeze-dried scaffold with the cell suspension. The efficient covering of the luminal surface of the tube was then made possible thanks to the implementation of a magnetic-based patterning technique. Human endothelial cells or endothelial progenitors were magnetically labeled with iron oxide nanoparticles and successfully attracted to the 2-mm lumen where they attached and formed a continuous endothelium. The combination of imaging modalities [fluorescence imaging, histology, and 3D magnetic resonance imaging (MRI)] evidenced the integrity of the vascular construct. In particular, the observation of different cell organizations in a vascular scaffold within the range of resolution of single cells by 4.7 T MRI is reported.
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Affiliation(s)
- Delphine Fayol
- Laboratoire Matière et Systèmes Complexes (MSC), UMR 7057 CNRS and Université Paris Diderot, Paris, France
| | - Catherine Le Visage
- Inserm, U698, Bio-ingénierie Cardiovasculaire, Université Paris Diderot, CHU X. Bichat, Paris, France
| | - Julia Ino
- Inserm, U698, Bio-ingénierie Cardiovasculaire, Université Paris Diderot, CHU X. Bichat, Paris, France
| | - Florence Gazeau
- Laboratoire Matière et Systèmes Complexes (MSC), UMR 7057 CNRS and Université Paris Diderot, Paris, France
| | - Didier Letourneur
- Inserm, U698, Bio-ingénierie Cardiovasculaire, Université Paris Diderot, CHU X. Bichat, Paris, France
| | - Claire Wilhelm
- Laboratoire Matière et Systèmes Complexes (MSC), UMR 7057 CNRS and Université Paris Diderot, Paris, France
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Mun CH, Jung Y, Kim SH, Kim HC, Kim SH. Effects of pulsatile bioreactor culture on vascular smooth muscle cells seeded on electrospun poly (lactide-co-ε-caprolactone) scaffold. Artif Organs 2013; 37:E168-78. [PMID: 23834728 DOI: 10.1111/aor.12108] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Electrospun nanofibrous scaffolds have several advantages, such as an extremely high surface-to-volume ratio, tunable porosity, and malleability to conform over a wide variety of sizes and shapes. However, there are limitations to culturing the cells on the scaffold, including the inability of the cells to infiltrate because of the scaffold's nano-sized pores. To overcome the limitations, we developed a controlled pulsatile bioreactor that produces static and dynamic flow, which improves transfer of such nutrients and oxygen, and a tubular-shaped vascular graft using cell matrix engineering. Electrospun scaffolds were seeded with smooth muscle cells (SMCs), cultured under dynamic or static conditions for 14 days, and analyzed. Mechanical examination revealed higher burst strength in the vascular grafts cultured under dynamic conditions than under static conditions. Also, immunohistology stain for alpa smooth muscle actin showed the difference of SMC distribution and existence on the scaffold between the static and dynamic culture conditions. The higher proliferation rate of SMCs in dynamic culture rather than static culture could be explained by the design of the bioreactor which mimics the physical environment such as media flow and pressure through the lumen of the construct. This supports regulation of collagen and leads to a significant increase in tensile strength of the engineered tissues. These results showed that the SMCs/electrospinning poly (lactide-co-ε-caprolactone) scaffold constructs formed tubular-shaped vascular grafts and could be useful in vascular tissue engineering.
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Affiliation(s)
- Cho Hay Mun
- Biomaterials Research Center, Division of Life & Health Sciences, Korea Institute of Science and Technology, Seoul, Korea; Department of Biomedical Engineering, Seoul National University, Seoul, Korea
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Development and characterization of poly(ε-caprolactone) hollow fiber membranes for vascular tissue engineering. J Memb Sci 2013. [DOI: 10.1016/j.memsci.2013.03.024] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Liu H, Ding X, Bi Y, Gong X, Li X, Zhou G, Fan Y. In Vitro Evaluation of Combined Sulfated Silk Fibroin Scaffolds for Vascular Cell Growth. Macromol Biosci 2013; 13:755-66. [DOI: 10.1002/mabi.201200470] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2012] [Revised: 02/23/2013] [Indexed: 01/15/2023]
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Non-Destructive Analysis of Extracellular Matrix Development in Cardiovascular Tissue-Engineered Constructs. Ann Biomed Eng 2013; 41:883-93. [DOI: 10.1007/s10439-012-0734-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2012] [Accepted: 12/19/2012] [Indexed: 10/27/2022]
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44
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Blood Vessel Tissue Engineering. Biomater Sci 2013. [DOI: 10.1016/b978-0-08-087780-8.00115-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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45
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Koch S, Stappenbeck N, Cornelissen CG, Flanagan TC, Mela P, Sachweh J, Hermanns-Sachweh B, Jockenhoevel S. Tissue Engineering: Selecting the Optimal Fixative for Immunohistochemistry. Tissue Eng Part C Methods 2012; 18:976-83. [DOI: 10.1089/ten.tec.2012.0159] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Sabine Koch
- Department of Tissue Engineering & Textile Implants, Applied Medical Engineering, University Hospital Aachen, Aachen, Germany
| | - Nadine Stappenbeck
- Department of Tissue Engineering & Textile Implants, Applied Medical Engineering, University Hospital Aachen, Aachen, Germany
| | - Christian G. Cornelissen
- Department of Tissue Engineering & Textile Implants, Applied Medical Engineering, University Hospital Aachen, Aachen, Germany
- Medizinische Klinik I and Pneumology, University Hospital Aachen, Aachen, Germany
| | - Thomas Cormac Flanagan
- School of Medicine & Medical Science, Health Sciences Centre, University College Dublin, Dublin, Ireland
| | - Petra Mela
- Department of Tissue Engineering & Textile Implants, Applied Medical Engineering, University Hospital Aachen, Aachen, Germany
| | - Jörg Sachweh
- Department of Tissue Engineering & Textile Implants, Applied Medical Engineering, University Hospital Aachen, Aachen, Germany
| | | | - Stefan Jockenhoevel
- Department of Tissue Engineering & Textile Implants, Applied Medical Engineering, University Hospital Aachen, Aachen, Germany
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Weinandy S, Rongen L, Schreiber F, Cornelissen C, Flanagan TC, Mahnken A, Gries T, Schmitz-Rode T, Jockenhoevel S. The BioStent: novel concept for a viable stent structure. Tissue Eng Part A 2012; 18:1818-26. [PMID: 22519682 DOI: 10.1089/ten.tea.2011.0648] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
OBJECTIVES Percutaneous stenting of occluded peripheral vessels is a well-established technique in clinical practice. Unfortunately, the patency rates of small-caliber vessels after stenting remain unsatisfactory. The aim of the BioStent concept is to overcome in-stent restenosis by excluding the diseased vessel segment entirely from the blood stream, in addition to providing an intact endothelial cell layer. DESIGN The concept combines the principles of vascular tissue engineering with a self-expanding stent: casting of the stent within a cellularized fibrin gel structure, followed by bioreactor conditioning, allows complete integration of the stent within engineered tissue. MATERIALS AND METHODS Small-caliber BioStents (Ø=6 mm; n=4) were produced by casting a nitinol stent within a thin fibrin/vascular smooth muscle cell (vSMC) mixture, followed by luminal endothelial cell seeding, and conditioning of the BioStent within a bioreactor system. The potential remodeling of the fibrin component into tissue was analyzed using routine histological methods. Scanning electron microscopy was used to assess the luminal endothelial cell coverage following the conditioning phase and crimping of the stent. RESULTS The BioStent was shown to be noncytotoxic, with no significant effect on cell proliferation. Gross and microscopic analysis revealed complete integration of the nitinol component within a viable tissue structure. Hematoxylin and eosin staining revealed a homogenous distribution of vSMCs throughout the thickness of the BioStent, while a smooth, confluent luminal endothelial cell lining was evident and not significantly affected by the crimping/release process. CONCLUSIONS The BioStent concept is a platform technology offering a novel opportunity to generate a viable, self-expanding stent structure with a functional endothelial cell lining. This platform technology can be transferred to different applications depending on the luminal cell lining required.
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Affiliation(s)
- Stefan Weinandy
- Department of Tissue Engineering & Textile Implants, AME-Helmholtz Institute for Biomedical Engineering, RWTH Aachen University, Aachen, Germany
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van Vlimmeren MA, Driessen-Mol A, Oomens CW, van den Broek M, Stoop R, Bouten CV, Baaijens FP. Low Oxygen Concentrations Impair Tissue Development in Tissue-Engineered Cardiovascular Constructs. Tissue Eng Part A 2012; 18:221-31. [DOI: 10.1089/ten.tea.2010.0658] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Affiliation(s)
| | - Anita Driessen-Mol
- Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Cees W.J. Oomens
- Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Marloes van den Broek
- Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Reinout Stoop
- TNO, Metabolic Health Research, Leiden, The Netherlands
| | - Carlijn V.C. Bouten
- Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Frank P.T. Baaijens
- Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands
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Koroleva A, Gittard S, Schlie S, Deiwick A, Jockenhoevel S, Chichkov B. Fabrication of fibrin scaffolds with controlled microscale architecture by a two-photon polymerization–micromolding technique. Biofabrication 2012; 4:015001. [DOI: 10.1088/1758-5082/4/1/015001] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Couet F, Meghezi S, Mantovani D. Fetal development, mechanobiology and optimal control processes can improve vascular tissue regeneration in bioreactors: an integrative review. Med Eng Phys 2011; 34:269-78. [PMID: 22133487 DOI: 10.1016/j.medengphy.2011.10.009] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2011] [Revised: 10/20/2011] [Accepted: 10/21/2011] [Indexed: 11/30/2022]
Abstract
Vascular tissue engineering aims to regenerate blood vessels to replace diseased arteries for cardiovascular patients. With the scaffold-based approach, cells are seeded on a scaffold showing specific properties and are expected to proliferate and self-organize into a functional vascular tissue. Bioreactors can significantly contribute to this objective by providing a suitable environment for the maturation of the tissue engineered blood vessel. It is recognized from the mechanotransduction principles that mechanical stimuli can influence the protein synthesis of the extra-cellular matrix thus leading to maturation and organization of the tissues. Up to date, no bioreactor is especially conceived to take advantage of the mechanobiology and optimize the construct maturation through an advanced control strategy. In this review, experimental strategies in the field of vascular tissue engineering are detailed, and a new approach inspired by fetal development, mechanobiology and optimal control paradigms is proposed. In this new approach, the culture conditions (i.e. flow, circumferential strain, pressure frequency, and others) are supposed to dynamically evolve to match the maturity of vascular constructs and maximize the efficiency of the regeneration process. Moreover, this approach allows the investigation of the mechanisms of growth, remodeling and mechanotransduction during the culture.
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Affiliation(s)
- Frédéric Couet
- Department of Materials Engineering & Research Centre, Quebec University Hospital, Laval University, Quebec City, Canada
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Allen R, Wang Y. Rapid Self-Assembly of Tubular Arterial Media Layer from Smooth Muscle Cells in Transient Fibrin Gel. JOURNAL OF TISSUE SCIENCE & ENGINEERING 2011; 10. [PMID: 23087841 DOI: 10.4172/2157-7552.1000105e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BACKGROUND: Tissue engineered blood vessels could address the large clinical need for small caliber vascular grafts. Self-assembly approaches that employ transient scaffolds to form tissues from only cells and secreted matrix could form completely autologous vascular grafts that rapidly remodel and integrate with host tissue in vivo. The objective of this study was to develop a simple and rapid method to self-assemble vascular cells into vascular grafts. HYPOTHESIS: We hypothesized that entrapment in rapidly degrading fibrin gels could facilitate self-assembly of vascular smooth muscle cells into a tubular tissue comprised mainly of SMCs and secreted matrix. METHODS: Baboon SMCs were entrapped in fibrin around a silicone tube and cultured for 14 days without fibrinolysis inhibitor. Spontaneous delamination from the inner tube allowed for simple isolation of constructs with forceps. RESULTS: Engineered tissues are tubular, handleable, and highly cellular, with substantial collagen deposition. Fibrin is largely degraded within 14 days. Tensile elastic modulus of ring segments is 36.2 kPa and 1.60 MPa for the toe and heel regions of the stress-strain relation, respectively. CONCLUSION: Fibrin entrapment without fibrinolysis inhibitor can facilitate rapid self-assembly of SMCs into tubular tissues. Future work will focus on mechanical conditioning and co-culture with vascular endothelial cells to improve mechanical strength and impart antithrombogenicity.
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Affiliation(s)
- Robert Allen
- Department of Bioengineering and Surgery, McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA 15213
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