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Wang X, Li K, Yuan Y, Zhang N, Zou Z, Wang Y, Yan S, Li X, Zhao P, Li Q. Nonlinear Elasticity of Blood Vessels and Vascular Grafts. ACS Biomater Sci Eng 2024; 10:3631-3654. [PMID: 38815169 DOI: 10.1021/acsbiomaterials.4c00326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2024]
Abstract
The transplantation of vascular grafts has emerged as a prevailing approach to address vascular disorders. However, the development of small-diameter vascular grafts is still in progress, as they serve in a more complicated mechanical environment than their counterparts with larger diameters. The biocompatibility and functional characteristics of small-diameter vascular grafts have been well developed; however, mismatch in mechanical properties between the vascular grafts and native arteries has not been accomplished, which might facilitate the long-term patency of small-diameter vascular grafts. From a point of view in mechanics, mimicking the nonlinear elastic mechanical behavior exhibited by natural blood vessels might be the state-of-the-art in designing vascular grafts. This review centers on elucidating the nonlinear elastic behavior of natural blood vessels and vascular grafts. The biological functionality and limitations associated with as-reported vascular grafts are meticulously reviewed and the future trajectory for fabricating biomimetic small-diameter grafts is discussed. This review might provide a different insight from the traditional design and fabrication of artificial vascular grafts.
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Affiliation(s)
- Xiaofeng Wang
- School of Mechanics and Safety Engineering, National Center for International Research of Micro-nano Molding Technology, Zhengzhou University, Zhengzhou 450001, China
- The State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou 310027, China
| | - Kecheng Li
- School of Mechanics and Safety Engineering, National Center for International Research of Micro-nano Molding Technology, Zhengzhou University, Zhengzhou 450001, China
| | - Yuan Yuan
- School of Mechanics and Safety Engineering, National Center for International Research of Micro-nano Molding Technology, Zhengzhou University, Zhengzhou 450001, China
| | - Ning Zhang
- School of Mechanics and Safety Engineering, National Center for International Research of Micro-nano Molding Technology, Zhengzhou University, Zhengzhou 450001, China
| | - Zifan Zou
- School of Mechanics and Safety Engineering, National Center for International Research of Micro-nano Molding Technology, Zhengzhou University, Zhengzhou 450001, China
| | - Yun Wang
- School of Mechanics and Safety Engineering, National Center for International Research of Micro-nano Molding Technology, Zhengzhou University, Zhengzhou 450001, China
| | - Shujie Yan
- School of Mechanics and Safety Engineering, National Center for International Research of Micro-nano Molding Technology, Zhengzhou University, Zhengzhou 450001, China
| | - Xiaomeng Li
- School of Mechanics and Safety Engineering, National Center for International Research of Micro-nano Molding Technology, Zhengzhou University, Zhengzhou 450001, China
| | - Peng Zhao
- The State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou 310027, China
| | - Qian Li
- School of Mechanics and Safety Engineering, National Center for International Research of Micro-nano Molding Technology, Zhengzhou University, Zhengzhou 450001, China
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2
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Li G, Bao L, Hu G, Chen L, Zhou X, Hong FF. Development and performance evaluation of a novel elastic bacterial nanocellulose/polyurethane small caliber artificial blood vessels. Int J Biol Macromol 2024; 268:131685. [PMID: 38641268 DOI: 10.1016/j.ijbiomac.2024.131685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 02/05/2024] [Accepted: 04/16/2024] [Indexed: 04/21/2024]
Abstract
There is an increasing demand for small-diameter blood vessels. Currently, there is no clinically available small-diameter artificial vessel. Bacterial nanocellulose (BNC) has vast potential for applications in artificial blood vessels due to its good biocompatibility. At the same time, medical polyurethane (PU) is a highly elastic polymer material widely used in artificial blood vessels. This study reports a composite small-diameter BNC/PU conduit using a non-solvent-induced phase separation method with the highly hydrophilic BNC tube as the skeleton and the hydrophobic polycarbonate PU as the filling material. The results revealed that the compliance and mechanical matching of BNC/PU tubes were higher than BNC tubes; the axial/radial mechanical strength, burst pressure, and suture strength were significantly improved; the blood compatibility and cell compatibility were also excellent. The molecular and subcutaneous embedding tests showed that the composite tubes had lighter inflammatory reactions. The results of the animal substitution experiments showed that the BNC/PU tubes kept blood flow unobstructed without tissue proliferation after implantation in rats for 9 months. Thus, the BNC/PU small-diameter vascular prosthesis had the potential for long-term patency and acted as an ideal material for small-diameter vessels.
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Affiliation(s)
- Geli Li
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai 201620, China; College of Biological Science and Medical Engineering, Donghua University, No. 2999 North Renmin Road, Shanghai 201620, China; Scientific Research Base of Bacterial Nanofiber Manufacturing and Composite Technology, China Textile Engineering Society, China
| | - Luhan Bao
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai 201620, China; College of Biological Science and Medical Engineering, Donghua University, No. 2999 North Renmin Road, Shanghai 201620, China; Scientific Research Base of Bacterial Nanofiber Manufacturing and Composite Technology, China Textile Engineering Society, China
| | - Gaoquan Hu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai 201620, China; College of Biological Science and Medical Engineering, Donghua University, No. 2999 North Renmin Road, Shanghai 201620, China; Scientific Research Base of Bacterial Nanofiber Manufacturing and Composite Technology, China Textile Engineering Society, China
| | - Lin Chen
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai 201620, China; Scientific Research Base of Bacterial Nanofiber Manufacturing and Composite Technology, China Textile Engineering Society, China
| | - Xingping Zhou
- College of Biological Science and Medical Engineering, Donghua University, No. 2999 North Renmin Road, Shanghai 201620, China
| | - Feng F Hong
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai 201620, China; College of Biological Science and Medical Engineering, Donghua University, No. 2999 North Renmin Road, Shanghai 201620, China; Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative Medicine, Donghua University, Shanghai 201620, China; Scientific Research Base of Bacterial Nanofiber Manufacturing and Composite Technology, China Textile Engineering Society, China.
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3
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Han Y, Wang H, Guan Y, Li S, Yuan Z, Lu L, Zheng X. High-precision 3D printing of multi-branch vascular scaffold with plasticized PLCL thermoplastic elastomer. Biomed Mater 2024; 19:035042. [PMID: 38636492 DOI: 10.1088/1748-605x/ad407c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Accepted: 04/18/2024] [Indexed: 04/20/2024]
Abstract
Three-dimensional (3D) printing has emerged as a transformative technology for tissue engineering, enabling the production of structures that closely emulate the intricate architecture and mechanical properties of native biological tissues. However, the fabrication of complex microstructures with high accuracy using biocompatible, degradable thermoplastic elastomers poses significant technical obstacles. This is primarily due to the inherent soft-matter nature of such materials, which complicates real-time control of micro-squeezing, resulting in low fidelity or even failure. In this study, we employ Poly (L-lactide-co-ϵ-caprolactone) (PLCL) as a model material and introduce a novel framework for high-precision 3D printing based on the material plasticization process. This approach significantly enhances the dynamic responsiveness of the start-stop transition during printing, thereby reducing harmful errors by up to 93%. Leveraging this enhanced material, we have efficiently fabricated arrays of multi-branched vascular scaffolds that exhibit exceptional morphological fidelity and possess elastic moduli that faithfully approximate the physiological modulus spectrum of native blood vessels, ranging from 2.5 to 45 MPa. The methodology we propose for the compatibilization and modification of elastomeric materials addresses the challenge of real-time precision control, representing a significant advancement in the domain of melt polymer 3D printing. This innovation holds considerable promise for the creation of detailed multi-branch vascular scaffolds and other sophisticated organotypic structures critical to advancing tissue engineering and regenerative medicine.
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Affiliation(s)
- Yunda Han
- School of Mechanical Engineering, Shenyang University of Technology, Shenyang, 110870, People's Republic of China
- State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, People's Republic of China
- Institutes for Robotics and Intelligent Manufacturing, Chinese Academy of Sciences, Shenyang 110169, People's Republic of China
| | - Heran Wang
- State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, People's Republic of China
- Institutes for Robotics and Intelligent Manufacturing, Chinese Academy of Sciences, Shenyang 110169, People's Republic of China
| | - Yuheng Guan
- School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, People's Republic of China
| | - Song Li
- State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, People's Republic of China
- Institutes for Robotics and Intelligent Manufacturing, Chinese Academy of Sciences, Shenyang 110169, People's Republic of China
| | - Zewei Yuan
- School of Mechanical Engineering, Shenyang University of Technology, Shenyang, 110870, People's Republic of China
| | - Lihua Lu
- School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, People's Republic of China
| | - Xiongfei Zheng
- State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, People's Republic of China
- Institutes for Robotics and Intelligent Manufacturing, Chinese Academy of Sciences, Shenyang 110169, People's Republic of China
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4
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Cevik M, Dikici S. Development of tissue-engineered vascular grafts from decellularized parsley stems. SOFT MATTER 2024; 20:338-350. [PMID: 38088147 DOI: 10.1039/d3sm01236k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2024]
Abstract
Cardiovascular diseases are mostly associated with narrowing or blockage of blood vessels, and it is the most common cause of death worldwide. The use of vascular grafts is a promising approach to bypass or replace the blocked vessels for long-term treatment. Although autologous arteries or veins are the most preferred tissue sources for vascular bypass, the limited presence and poor quality of autologous vessels necessitate seeking alternative biomaterials. Recently, synthetic grafts have gained attention as an alternative to autologous grafts. However, the high failure rate of synthetic grafts has been reported primarily due to thrombosis, atherosclerosis, intimal hyperplasia, or infection. Thrombosis, the main reason for failure upon implantation, is associated with damage or absence of endothelial cell lining in the vascular graft's luminal surface. To overcome this, tissue-engineered vascular grafts (TEVGs) have come into prominence. Alongside the well-established scaffold manufacturing techniques, decellularized plant-based constructs have recently gained significant importance and are an emerging field in tissue engineering and regenerative medicine. Accordingly, in this study, we demonstrated the fabrication of tubular scaffolds from decellularized parsley stems and recellularized them with human endothelial cells to be used as a potential TEVG. Our results suggested that the native plant DNA was successfully removed, and soft tubular biomaterials were successfully manufactured via the chemical decellularization of the parsley stems. The decellularized parsley stems showed suitable mechanical and biological properties to be used as a TEVG material, and they provided a suitable environment for the culture of human endothelial cells to attach and create a pseudo endothelium prior to implantation. This study is the first one to demonstrate the potential of the parsley stems to be used as a potential TEVG biomaterial.
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Affiliation(s)
- Merve Cevik
- Department of Biotechnology, Graduate School of Education, Izmir Institute of Technology, 35430, Izmir, Turkey
| | - Serkan Dikici
- Department of Bioengineering, Faculty of Engineering, Izmir Institute of Technology, 35430, Izmir, Turkey.
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Weekes A, Wehr G, Pinto N, Jenkins J, Li Z, Meinert C, Klein TJ. Highly compliant biomimetic scaffolds for small diameter tissue-engineered vascular grafts (TEVGs) produced via melt electrowriting (MEW). Biofabrication 2023; 16:015017. [PMID: 37992322 DOI: 10.1088/1758-5090/ad0ee1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Accepted: 11/22/2023] [Indexed: 11/24/2023]
Abstract
Biofabrication approaches toward the development of tissue-engineered vascular grafts (TEVGs) have been widely investigated. However, successful translation has been limited to large diameter applications, with small diameter grafts frequently failing due to poor mechanical performance, in particular mismatched radial compliance. Herein, melt electrowriting (MEW) of poly(ϵ-caprolactone) has enabled the manufacture of highly porous, biocompatible microfibre scaffolds with physiological anisotropic mechanical properties, as substrates for the biofabrication of small diameter TEVGs. Highly reproducible scaffolds with internal diameter of 4.0 mm were designed with 500 and 250µm pore sizes, demonstrating minimal deviation of less than 4% from the intended architecture, with consistent fibre diameter of 15 ± 2µm across groups. Scaffolds were designed with straight or sinusoidal circumferential microfibre architecture respectively, to investigate the influence of biomimetic fibre straightening on radial compliance. The results demonstrate that scaffolds with wave-like circumferential microfibre laydown patterns mimicking the architectural arrangement of collagen fibres in arteries, exhibit physiological compliance (12.9 ± 0.6% per 100 mmHg), while equivalent control geometries with straight fibres exhibit significantly reduced compliance (5.5 ± 0.1% per 100 mmHg). Further mechanical characterisation revealed the sinusoidal scaffolds designed with 250µm pores exhibited physiologically relevant burst pressures of 1078 ± 236 mmHg, compared to 631 ± 105 mmHg for corresponding 500µm controls. Similar trends were observed for strength and failure, indicating enhanced mechanical performance of scaffolds with reduced pore spacing. Preliminaryin vitroculture of human mesenchymal stem cells validated the MEW scaffolds as suitable substrates for cellular growth and proliferation, with high cell viability (>90%) and coverage (>85%), with subsequent seeding of vascular endothelial cells indicating successful attachment and preliminary endothelialisation of tissue-cultured constructs. These findings support further investigation into long-term tissue culture methodologies for enhanced production of vascular extracellular matrix components, toward the development of the next generation of small diameter TEVGs.
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Affiliation(s)
- Angus Weekes
- Centre for Biomedical Technologies, Queensland University of Technology (QUT), Brisbane, QLD, Australia
- School of Mechanical, Medical and Process Engineering, Faculty of Engineering, Queensland University of Technology (QUT), Brisbane, QLD, Australia
- Herston Biofabrication Institute, Metro North Hospital and Health Services, Herston, QLD, Australia
| | - Gabrielle Wehr
- Herston Biofabrication Institute, Metro North Hospital and Health Services, Herston, QLD, Australia
| | - Nigel Pinto
- Herston Biofabrication Institute, Metro North Hospital and Health Services, Herston, QLD, Australia
- Department of Vascular Surgery, The Royal Brisbane and Women's Hospital, Herston, QLD, Australia
| | - Jason Jenkins
- Herston Biofabrication Institute, Metro North Hospital and Health Services, Herston, QLD, Australia
- Department of Vascular Surgery, The Royal Brisbane and Women's Hospital, Herston, QLD, Australia
| | - Zhiyong Li
- Centre for Biomedical Technologies, Queensland University of Technology (QUT), Brisbane, QLD, Australia
- School of Mechanical, Medical and Process Engineering, Faculty of Engineering, Queensland University of Technology (QUT), Brisbane, QLD, Australia
| | - Christoph Meinert
- Centre for Biomedical Technologies, Queensland University of Technology (QUT), Brisbane, QLD, Australia
- Herston Biofabrication Institute, Metro North Hospital and Health Services, Herston, QLD, Australia
| | - Travis J Klein
- Centre for Biomedical Technologies, Queensland University of Technology (QUT), Brisbane, QLD, Australia
- School of Mechanical, Medical and Process Engineering, Faculty of Engineering, Queensland University of Technology (QUT), Brisbane, QLD, Australia
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Thorsnes QS, Turner PR, Ali MA, Cabral JD. Integrating Fused Deposition Modeling and Melt Electrowriting for Engineering Branched Vasculature. Biomedicines 2023; 11:3139. [PMID: 38137359 PMCID: PMC10740633 DOI: 10.3390/biomedicines11123139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 11/09/2023] [Accepted: 11/21/2023] [Indexed: 12/24/2023] Open
Abstract
We demonstrate for the first time the combination of two additive manufacturing technologies used in tandem, fused deposition modelling (FDM) and melt electrowriting (MEW), to increase the range of possible MEW structures, with a focus on creating branched, hollow scaffolds for vascularization. First, computer-aided design (CAD) was used to design branched mold halves which were then used to FDM print conductive polylactic acid (cPLA) molds. Next, MEW was performed over the top of these FDM cPLA molds using polycaprolactone (PCL), an FDA-approved biomaterial. After the removal of the newly constructed MEW scaffolds from the FDM molds, complementary MEW scaffold halves were heat-melded together by placing the flat surfaces of each half onto a temperature-controlled platform, then pressing the heated halves together, and finally allowing them to cool to create branched, hollow constructs. This hybrid technique permitted the direct fabrication of hollow MEW structures that would otherwise not be possible to achieve using MEW alone. The scaffolds then underwent in vitro physical and biological testing. Specifically, dynamic mechanical analysis showed the scaffolds had an anisotropic stiffness of 1 MPa or 5 MPa, depending on the direction of the applied stress. After a month of incubation, normal human dermal fibroblasts (NHDFs) were seen growing on the scaffolds, which demonstrated that no deleterious effects were exerted by the MEW scaffolds constructed using FDM cPLA molds. The significant potential of our hybrid additive manufacturing approach to fabricate complex MEW scaffolds could be applied to a variety of tissue engineering applications, particularly in the field of vascularization.
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Affiliation(s)
- Quinn S. Thorsnes
- Department of Oral Rehabilitation, School of Dentistry, University of Otago, Dunedin 9054, New Zealand; (Q.S.T.); (M.A.A.)
| | - Paul R. Turner
- Department of Microbiology & Immunology, University of Otago, Dunedin 9054, New Zealand;
| | - Mohammed Azam Ali
- Department of Oral Rehabilitation, School of Dentistry, University of Otago, Dunedin 9054, New Zealand; (Q.S.T.); (M.A.A.)
| | - Jaydee D. Cabral
- Department of Microbiology & Immunology, University of Otago, Dunedin 9054, New Zealand;
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7
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Grosha J, Cho JH, Pasley S, Kilbride P, Zylberberg C, Rolle MW. Engineered Test Tissues: A Model for Quantifying the Effects of Cryopreservation Parameters. ACS Biomater Sci Eng 2023; 9:6198-6207. [PMID: 37802599 DOI: 10.1021/acsbiomaterials.3c00752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/10/2023]
Abstract
Engineered tissues are showing promise as implants to repair or replace damaged tissues in vivo or as in vitro tools to discover new therapies. A major challenge of the tissue engineering field is the sample preservation and storage until their transport and desired use. To successfully cryopreserve tissue, its viability, structure, and function must be retained post-thaw. The outcome of cryopreservation is impacted by several parameters, including the cryopreserving agent (CPA) utilized, the cooling rate, and the storage temperature. Although a number of CPAs are commercially available for cell cryopreservation, there are few CPAs designed specifically for tissue cryostorage and recovery. In this study, we present a flexible, relatively high-throughput method that utilizes engineered tissue rings as test tissues for screening the commercially available CPAs and cryopreservation parameters. Engineered test tissues can be fabricated with low batch-to-batch variability and characteristic morphology due to their endogenous extracellular matrix, and they have mechanical properties and a ring format suitable for testing with standard methods. The tissues were grown for 7 days in standard 48-well plates and cryopreserved in standard cryovials. The method allowed for the quantification of metabolic recovery, tissue apoptosis/necrosis, morphology, and mechanical properties. In addition to establishing the method, we tested different CPA formulations, freezing rates, and freezing points. Our proposed method enables timely preliminary screening of CPA formulations and cryopreservation parameters that may improve the storage of engineered tissues.
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Affiliation(s)
- Jonian Grosha
- Worcester Polytechnic Institute, Worcester, Massachusetts 01609, United States
| | - Jun-Hung Cho
- Akron Biotech, Boca Raton, Florida 33487, United States
| | | | | | | | - Marsha W Rolle
- Worcester Polytechnic Institute, Worcester, Massachusetts 01609, United States
- The Roux Institute, Northeastern University, Portland, Maine 04101, United States
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8
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Gadde M, Mehrabi-Dehdezi M, Debeb BG, Woodward WA, Rylander MN. Influence of Macrophages on Vascular Invasion of Inflammatory Breast Cancer Emboli Measured Using an In Vitro Microfluidic Multi-Cellular Platform. Cancers (Basel) 2023; 15:4883. [PMID: 37835577 PMCID: PMC10571588 DOI: 10.3390/cancers15194883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 09/21/2023] [Accepted: 09/22/2023] [Indexed: 10/15/2023] Open
Abstract
Inflammatory breast cancer (IBC) is an aggressive disease with a poor prognosis and a lack of effective treatments. It is widely established that understanding the interactions between tumor-associated macrophages (TAMs) and the tumor microenvironment is essential for identifying distinct targeting markers that help with prognosis and subsequent development of effective treatments. In this study, we present a 3D in vitro microfluidic IBC platform consisting of THP1 M0, M1, or M2 macrophages, IBC cells, and endothelial cells. The platform comprises a collagen matrix that includes an endothelialized vessel, creating a physiologically relevant environment for cellular interactions. Through the utilization of this platform, it was discovered that the inclusion of tumor-associated macrophages (TAMs) led to an increase in the formation of new blood vessel sprouts and enhanced permeability of the endothelium, regardless of the macrophage phenotype. Interestingly, the platforms containing THP-1 M1 or M2 macrophages exhibited significantly greater porosity in the collagen extracellular matrix (ECM) compared to the platforms containing THP-1 M0 and the MDA-IBC3 cells alone. Cytokine analysis revealed that IL-8 and MMP9 showed selective increases when macrophages were cultured in the platforms. Notably, intravasation of tumor cells into the vessels was observed exclusively in the platform containing MDA-IBC3 and M0 macrophages.
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Affiliation(s)
- Manasa Gadde
- Walker Department of Mechanical Engineering, The University of Texas at Austin, Austin, TX 78712, USA; (M.G.); (M.M.-D.)
| | - Melika Mehrabi-Dehdezi
- Walker Department of Mechanical Engineering, The University of Texas at Austin, Austin, TX 78712, USA; (M.G.); (M.M.-D.)
| | - Bisrat G. Debeb
- Department of Breast Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA;
- MD Anderson Morgan Welch Inflammatory Breast Cancer Clinic and Research Program, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA;
| | - Wendy A. Woodward
- MD Anderson Morgan Welch Inflammatory Breast Cancer Clinic and Research Program, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA;
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Marissa Nichole Rylander
- Walker Department of Mechanical Engineering, The University of Texas at Austin, Austin, TX 78712, USA; (M.G.); (M.M.-D.)
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX 78712, USA
- Oden Institute for Computational and Engineering Sciences, The University of Texas at Austin, Austin, TX 78712, USA
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9
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Rohringer S, Grasl C, Ehrmann K, Hager P, Hahn C, Specht SJ, Walter I, Schneider KH, Zopf LM, Baudis S, Liska R, Schima H, Podesser BK, Bergmeister H. Biodegradable, Self-Reinforcing Vascular Grafts for In Situ Tissue Engineering Approaches. Adv Healthc Mater 2023; 12:e2300520. [PMID: 37173073 DOI: 10.1002/adhm.202300520] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 04/21/2023] [Indexed: 05/15/2023]
Abstract
Clinically available small-diameter synthetic vascular grafts (SDVGs) have unsatisfactory patency rates due to impaired graft healing. Therefore, autologous implants are still the gold standard for small vessel replacement. Bioresorbable SDVGs may be an alternative, but many polymers have inadequate biomechanical properties that lead to graft failure. To overcome these limitations, a new biodegradable SDVG is developed to ensure safe use until adequate new tissue is formed. SDVGs are electrospun using a polymer blend composed of thermoplastic polyurethane (TPU) and a new self-reinforcing TP(U-urea) (TPUU). Biocompatibility is tested in vitro by cell seeding and hemocompatibility tests. In vivo performance is evaluated in rats over a period for up to six months. Autologous rat aortic implants serve as a control group. Scanning electron microscopy, micro-computed tomography (µCT), histology, and gene expression analyses are applied. TPU/TPUU grafts show significant improvement of biomechanical properties after water incubation and exhibit excellent cyto- and hemocompatibility. All grafts remain patent, and biomechanical properties are sufficient despite wall thinning. No inflammation, aneurysms, intimal hyperplasia, or thrombus formation are observed. Evaluation of graft healing shows similar gene expression profiles of TPU/TPUU and autologous conduits. These new biodegradable, self-reinforcing SDVGs may be promising candidates for clinical use in the future.
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Affiliation(s)
- Sabrina Rohringer
- Center for Biomedical Research and Translational Surgery, Medical University of Vienna, Waehringer Gürtel 18-20, Vienna, 1090, Austria
- Austrian Cluster for Tissue Regeneration, Donaueschingenstraße 13, Vienna, 1200, Austria
- Ludwig Boltzmann Institute for Cardiovascular Research, Waehringer Gürtel 18-20, Vienna, 1090, Austria
| | - Christian Grasl
- Ludwig Boltzmann Institute for Cardiovascular Research, Waehringer Gürtel 18-20, Vienna, 1090, Austria
- Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Waehringer Gürtel 18-20, Vienna, 1090, Austria
| | - Katharina Ehrmann
- Center for Biomedical Research and Translational Surgery, Medical University of Vienna, Waehringer Gürtel 18-20, Vienna, 1090, Austria
- Austrian Cluster for Tissue Regeneration, Donaueschingenstraße 13, Vienna, 1200, Austria
- Institute of Applied Synthetic Chemistry, Technical University of Vienna, Getreidemarkt 9/163, Vienna, 1060, Austria
| | - Pia Hager
- Center for Biomedical Research and Translational Surgery, Medical University of Vienna, Waehringer Gürtel 18-20, Vienna, 1090, Austria
- Ludwig Boltzmann Institute for Cardiovascular Research, Waehringer Gürtel 18-20, Vienna, 1090, Austria
| | - Clemens Hahn
- Center for Biomedical Research and Translational Surgery, Medical University of Vienna, Waehringer Gürtel 18-20, Vienna, 1090, Austria
- Ludwig Boltzmann Institute for Cardiovascular Research, Waehringer Gürtel 18-20, Vienna, 1090, Austria
| | - Sophie J Specht
- Center for Biomedical Research and Translational Surgery, Medical University of Vienna, Waehringer Gürtel 18-20, Vienna, 1090, Austria
- Ludwig Boltzmann Institute for Cardiovascular Research, Waehringer Gürtel 18-20, Vienna, 1090, Austria
| | - Ingrid Walter
- Department of Pathobiology, University of Veterinary Medicine, Veterinaerplatz 1, Vienna, 1210, Austria
| | - Karl H Schneider
- Center for Biomedical Research and Translational Surgery, Medical University of Vienna, Waehringer Gürtel 18-20, Vienna, 1090, Austria
- Austrian Cluster for Tissue Regeneration, Donaueschingenstraße 13, Vienna, 1200, Austria
- Ludwig Boltzmann Institute for Cardiovascular Research, Waehringer Gürtel 18-20, Vienna, 1090, Austria
| | - Lydia M Zopf
- Austrian Cluster for Tissue Regeneration, Donaueschingenstraße 13, Vienna, 1200, Austria
- Ludwig Boltzmann Institute for Traumatology, Donaueschingenstraße 13, Vienna, 1200, Austria
| | - Stefan Baudis
- Austrian Cluster for Tissue Regeneration, Donaueschingenstraße 13, Vienna, 1200, Austria
- Institute of Applied Synthetic Chemistry, Technical University of Vienna, Getreidemarkt 9/163, Vienna, 1060, Austria
| | - Robert Liska
- Austrian Cluster for Tissue Regeneration, Donaueschingenstraße 13, Vienna, 1200, Austria
- Institute of Applied Synthetic Chemistry, Technical University of Vienna, Getreidemarkt 9/163, Vienna, 1060, Austria
| | - Heinrich Schima
- Ludwig Boltzmann Institute for Cardiovascular Research, Waehringer Gürtel 18-20, Vienna, 1090, Austria
- Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Waehringer Gürtel 18-20, Vienna, 1090, Austria
| | - Bruno K Podesser
- Center for Biomedical Research and Translational Surgery, Medical University of Vienna, Waehringer Gürtel 18-20, Vienna, 1090, Austria
- Austrian Cluster for Tissue Regeneration, Donaueschingenstraße 13, Vienna, 1200, Austria
- Ludwig Boltzmann Institute for Cardiovascular Research, Waehringer Gürtel 18-20, Vienna, 1090, Austria
| | - Helga Bergmeister
- Center for Biomedical Research and Translational Surgery, Medical University of Vienna, Waehringer Gürtel 18-20, Vienna, 1090, Austria
- Austrian Cluster for Tissue Regeneration, Donaueschingenstraße 13, Vienna, 1200, Austria
- Ludwig Boltzmann Institute for Cardiovascular Research, Waehringer Gürtel 18-20, Vienna, 1090, Austria
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10
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Isik M, Karakaya E, Arslan TS, Atila D, Erdogan YK, Arslan YE, Eskizengin H, Eylem CC, Nemutlu E, Ercan B, D'Este M, Okesola BO, Derkus B. 3D Printing of Extracellular Matrix-Based Multicomponent, All-Natural, Highly Elastic, and Functional Materials toward Vascular Tissue Engineering. Adv Healthc Mater 2023; 12:e2203044. [PMID: 37014809 DOI: 10.1002/adhm.202203044] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 03/12/2023] [Indexed: 04/05/2023]
Abstract
3D printing offers an exciting opportunity to fabricate biological constructs with specific geometries, clinically relevant sizes, and functions for biomedical applications. However, successful application of 3D printing is limited by the narrow range of printable and bio-instructive materials. Multicomponent hydrogel bioinks present unique opportunities to create bio-instructive materials able to display high structural fidelity and fulfill the mechanical and functional requirements for in situ tissue engineering. Herein, 3D printable and perfusable multicomponent hydrogel constructs with high elasticity, self-recovery properties, excellent hydrodynamic performance, and improved bioactivity are reported. The materials' design strategy integrates fast gelation kinetics of sodium alginate (Alg), in situ crosslinking of tyramine-modified hyaluronic acid (HAT), and temperature-dependent self-assembly and biological functions of decellularized aorta (dAECM). Using extrusion-based printing approach, the capability to print the multicomponent hydrogel bioinks with high precision into a well-defined vascular constructs able to withstand flow and repetitive cyclic compressive loading, is demonstrated. Both in vitro and pre-clinical models are used to show the pro-angiogenic and anti-inflammatory properties of the multicomponent vascular constructs. This study presents a strategy to create new bioink whose functional properties are greater than the sum of their components and with potential applications in vascular tissue engineering and regenerative medicine.
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Affiliation(s)
- Melis Isik
- Stem Cell Research Lab, Department of Chemistry, Faculty of Science, Ankara University, Ankara, 06560, Turkey
| | - Ece Karakaya
- Stem Cell Research Lab, Department of Chemistry, Faculty of Science, Ankara University, Ankara, 06560, Turkey
| | - Tugba Sezgin Arslan
- Stem Cell Research Lab, Department of Chemistry, Faculty of Science, Ankara University, Ankara, 06560, Turkey
| | - Deniz Atila
- Department of Engineering Sciences, Middle East Technical University, Ankara, 06800, Turkey
- International Centre for Research on Innovative Bio-based Materials (ICRI-BioM), Lodz University of Technology, Lodz, 90924, Poland
| | - Yasar Kemal Erdogan
- Biomedical Engineering Program, Middle East Technical University, Ankara, 06800, Turkey
- Department of Biomedical Engineering, Isparta University of Applied Science, Isparta, 32260, Turkey
| | - Yavuz Emre Arslan
- Regenerative Biomaterials Laboratory, Department of Bioengineering, Faculty of Engineering, Canakkale Onsekiz Mart University, Canakkale, 17100, Turkey
| | - Hakan Eskizengin
- Department of Biology, Faculty of Science, Ankara University, Ankara, 06560, Turkey
| | - Cemil Can Eylem
- Analytical Chemistry Division, Faculty of Pharmacy, Hacettepe University, Ankara, 06230, Turkey
| | - Emirhan Nemutlu
- Analytical Chemistry Division, Faculty of Pharmacy, Hacettepe University, Ankara, 06230, Turkey
- Bioanalytic and Omics Laboratory, Faculty of Pharmacy, Hacettepe University, Ankara, 06100, Turkey
| | - Batur Ercan
- Biomedical Engineering Program, Middle East Technical University, Ankara, 06800, Turkey
- Department of Metallurgical and Materials Engineering, Middle East Technical University, Ankara, 06800, Turkey
| | - Matteo D'Este
- AO Research Institute Davos, Clavadelerstrasse 8, Davos Platz, 7270, Switzerland
| | - Babatunde O Okesola
- School of Life Sciences, Faculty of Medicine and Health Sciences, University of Nottingham, University Park, Nottingham, NG7 2UH, UK
| | - Burak Derkus
- Stem Cell Research Lab, Department of Chemistry, Faculty of Science, Ankara University, Ankara, 06560, Turkey
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11
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Chen J, Zhang D, Wu LP, Zhao M. Current Strategies for Engineered Vascular Grafts and Vascularized Tissue Engineering. Polymers (Basel) 2023; 15:polym15092015. [PMID: 37177162 PMCID: PMC10181238 DOI: 10.3390/polym15092015] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 04/21/2023] [Accepted: 04/21/2023] [Indexed: 05/15/2023] Open
Abstract
Blood vessels not only transport oxygen and nutrients to each organ, but also play an important role in the regulation of tissue regeneration. Impaired or occluded vessels can result in ischemia, tissue necrosis, or even life-threatening events. Bioengineered vascular grafts have become a promising alternative treatment for damaged or occlusive vessels. Large-scale tubular grafts, which can match arteries, arterioles, and venules, as well as meso- and microscale vasculature to alleviate ischemia or prevascularized engineered tissues, have been developed. In this review, materials and techniques for engineering tubular scaffolds and vasculature at all levels are discussed. Examples of vascularized tissue engineering in bone, peripheral nerves, and the heart are also provided. Finally, the current challenges are discussed and the perspectives on future developments in biofunctional engineered vessels are delineated.
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Affiliation(s)
- Jun Chen
- Department of Organ Transplantation, Zhujiang Hospital, Southern Medical University, Guangzhou 510280, China
- Center for Chemical Biology and Drug Discovery, Laboratory of Computational Biomedicine, Guangzhou Institute of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China
| | - Di Zhang
- Center for Chemical Biology and Drug Discovery, Laboratory of Computational Biomedicine, Guangzhou Institute of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China
| | - Lin-Ping Wu
- Center for Chemical Biology and Drug Discovery, Laboratory of Computational Biomedicine, Guangzhou Institute of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China
| | - Ming Zhao
- Department of Organ Transplantation, Zhujiang Hospital, Southern Medical University, Guangzhou 510280, China
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12
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Peng X, Li L, Xing J, Cheng C, Hu M, Luo Y, Shi S, Liu Y, Cui Z, Yu X. Cross-linking porcine peritoneum by oxidized konjac glucomannan: a novel method to improve the properties of cardiovascular substitute material. JOURNAL OF LEATHER SCIENCE AND ENGINEERING 2023. [DOI: 10.1186/s42825-023-00114-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
AbstractThe use of natural polysaccharide crosslinkers for decellularized matrices is an effective approach to prepare cardiovascular substitute materials. In this research, NaIO4 was applied to oxidize konjac glucomannan to prepare the polysaccharide crosslinker oxidized konjac glucomannan (OKGM). The as-prepared crosslinker was then used to stabilize collagen-rich decellularized porcine peritoneum (DPP) to construct a cardiovascular substitute material (OKGM-fixed DPP). The results demonstrated that compared with GA-fixed DPP and GNP-fixed DPP, 3.75% OKGM [1:1.5 (KGM: NaIO4)]-fixed DPP demonstrated suitable mechanical properties, as well as good hemocompatibility, excellent anti-calcification capability, and anti-enzymolysis in vitro. Furthermore, 3.75% OKGM [1:1.5 (KGM: NaIO4)]-fixed DPP was suitable for vascular endothelial cell adhesion and rapid proliferation, and a single layer of endothelial cells was formed on the fifth day of culture. The in vivo experimental results also showed excellent histocompatibility. The current results demonstrted that OKGM was a novel polysaccharide cross-linking reagent for crosslinking natural tissues featured with rich collagen content, and 3.75% OKGM [1:1.5 (KGM: NaIO4)]-fixed DPP was a potential cardiovascular substitute material.
Graphical Abstract
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13
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Justin AW, Cammarata F, Guy AA, Estevez SR, Burgess S, Davaapil H, Stavropoulou-Tatla A, Ong J, Jacob AG, Saeb-Parsy K, Sinha S, Markaki AE. Densified collagen tubular grafts for human tissue replacement and disease modelling applications. BIOMATERIALS ADVANCES 2023; 145:213245. [PMID: 36549149 DOI: 10.1016/j.bioadv.2022.213245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 12/07/2022] [Accepted: 12/09/2022] [Indexed: 12/23/2022]
Abstract
There is a significant need across multiple indications for an off-the-shelf bioengineered tubular graft which fulfils the mechanical and biological requirements for implantation and function but does not necessarily require cells for manufacture or deployment. Herein, we present a tissue-like tubular construct using a cell-free, materials-based method of manufacture, utilizing densified collagen hydrogel. Our tubular grafts are seamless, mechanically strong, customizable in terms of lumen diameter and wall thickness, and display a uniform fibril density across the wall thickness and along the tube length. While the method enables acellular grafts to be generated rapidly, inexpensively, and to a wide range of specifications, the cell-compatible densification process also enables a high density of cells to be incorporated uniformly into the walls of the tubes, which we show can be maintained under perfusion culture. Additionally, the method enables tubes consisting of distinct cell domains with cellular configurations at the boundaries which may be useful for modelling aortic disease. Further, we demonstrate additional steps which allow for luminal surface patterning. These results highlight the universality of this approach and its potential for developing the next generation of bioengineered grafts.
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Affiliation(s)
- Alexander W Justin
- Department of Engineering, University of Cambridge, Trumpington Street, Cambridge CB2 1PZ, UK.
| | - Federico Cammarata
- Department of Engineering, University of Cambridge, Trumpington Street, Cambridge CB2 1PZ, UK
| | - Andrew A Guy
- Department of Engineering, University of Cambridge, Trumpington Street, Cambridge CB2 1PZ, UK
| | - Silas R Estevez
- Department of Engineering, University of Cambridge, Trumpington Street, Cambridge CB2 1PZ, UK
| | - Sebastian Burgess
- Department of Engineering, University of Cambridge, Trumpington Street, Cambridge CB2 1PZ, UK
| | - Hongorzul Davaapil
- Wellcome-Medical Research Council Cambridge Stem Cell Institute, Jeffrey Cheah Biomedical Centre, University of Cambridge, Cambridge CB2 0AW, UK; Department of Medicine, Division of Cardiovascular Medicine, University of Cambridge, Cambridge CB2 0QQ, UK
| | | | - John Ong
- Department of Engineering, University of Cambridge, Trumpington Street, Cambridge CB2 1PZ, UK; East of England Gastroenterology Speciality Training Program, Cambridge, UK
| | - Aishwarya G Jacob
- Wellcome-Medical Research Council Cambridge Stem Cell Institute, Jeffrey Cheah Biomedical Centre, University of Cambridge, Cambridge CB2 0AW, UK; Department of Biochemistry, University of Cambridge, Downing Site, Tennis Court Road, Cambridge CB2 1QW, UK
| | - Kourosh Saeb-Parsy
- Department of Surgery, University of Cambridge, and NIHR Cambridge Biomedical Research Centre, Cambridge CB2 0QQ, UK
| | - Sanjay Sinha
- Department of Medicine, Division of Cardiovascular Medicine, University of Cambridge, Cambridge CB2 0QQ, UK
| | - Athina E Markaki
- Department of Engineering, University of Cambridge, Trumpington Street, Cambridge CB2 1PZ, UK.
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14
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Wang B, Wang X, Kenneth A, Drena A, Pacheco A, Kalvin L, Ibrahim ES, Rossi PJ, Thatcher K, Lincoln J. Developing small-diameter vascular grafts with human amniotic membrane: long-term evaluation of transplantation outcomes in a small animal model. Biofabrication 2023; 15. [PMID: 36626826 DOI: 10.1088/1758-5090/acb1da] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Accepted: 01/10/2023] [Indexed: 01/11/2023]
Abstract
While current clinical utilization of large vascular grafts for vascular transplantation is encouraging, tissue engineering of small grafts still faces numerous challenges. This study aims to investigate the feasibility of constructing a small vascular graft from decellularized amniotic membranes (DAMs). DAMs were rolled around a catheter and each of the resulting grafts was crosslinked with (a) 0.1% glutaraldehyde; (b) 1-ethyl-3-(3-dimethylaminopropyl) crbodiimidehydro-chloride (20 mM)-N-hydroxy-succinimide (10 mM); (c) 0.5% genipin; and (d) no-crosslinking, respectively. Our results demonstrated the feasibility of using a rolling technique followed by lyophilization to transform DAM into a vessel-like structure. The genipin-crosslinked DAM graft showed an improved integrated structure, prolonged stability, proper mechanical property, and superior biocompatibility. After transplantation in rat abdominal aorta, the genipin-crosslinked DAM graft remained patent up to 16 months, with both endothelial and smooth muscle cell regeneration, which suggests that the genipin-crosslinked DAM graft has great potential to beimplementedas a small tissue engineered graft for futurevasculartransplantation.
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Affiliation(s)
- Bo Wang
- Joint Department of Biomedical Engineering, Marquette University and the Medical College of Wisconsin, Milwaukee, WI 53226, United States of America
| | - Xiaolong Wang
- Joint Department of Biomedical Engineering, Marquette University and the Medical College of Wisconsin, Milwaukee, WI 53226, United States of America
| | - Allen Kenneth
- Biomedical Resource Center, Medical College of Wisconsin, Milwaukee, WI 53226, United States of America
| | - Alexander Drena
- Department of Chemistry and Biochemistry, University of Wisconsin-Milwaukee, Milwaukee, WI 53211, United States of America
| | - Arsenio Pacheco
- Department of Chemistry and Biochemistry, University of Wisconsin-Milwaukee, Milwaukee, WI 53211, United States of America
| | - Lindsey Kalvin
- Department of Medicine, Division of Cardiovascular Medicine, Medical College of Wisconsin, Milwaukee, WI 53226, United States of America
| | - Ei-Sayed Ibrahim
- Department of Radiology, Medical College of Wisconsin, Milwaukee, WI 53226, United States of America
| | - Peter J Rossi
- Heart and Vascular Center, Froedtert Hospital, Milwaukee, WI 53226, United States of America
| | - Kaitlyn Thatcher
- Department of Pediatrics, Medical College of Wisconsin, Milwaukee, WI 53226, United States of America
| | - Joy Lincoln
- Department of Pediatrics, Medical College of Wisconsin, Milwaukee, WI 53226, United States of America
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15
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Wang X, Chan V, Corridon PR. Decellularized blood vessel development: Current state-of-the-art and future directions. Front Bioeng Biotechnol 2022; 10:951644. [PMID: 36003539 PMCID: PMC9394443 DOI: 10.3389/fbioe.2022.951644] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Accepted: 07/14/2022] [Indexed: 12/31/2022] Open
Abstract
Vascular diseases contribute to intensive and irreversible damage, and current treatments include medications, rehabilitation, and surgical interventions. Often, these diseases require some form of vascular replacement therapy (VRT) to help patients overcome life-threatening conditions and traumatic injuries annually. Current VRTs rely on harvesting blood vessels from various regions of the body like the arms, legs, chest, and abdomen. However, these procedures also produce further complications like donor site morbidity. Such common comorbidities may lead to substantial pain, infections, decreased function, and additional reconstructive or cosmetic surgeries. Vascular tissue engineering technology promises to reduce or eliminate these issues, and the existing state-of-the-art approach is based on synthetic or natural polymer tubes aiming to mimic various types of blood vessel. Burgeoning decellularization techniques are considered as the most viable tissue engineering strategy to fill these gaps. This review discusses various approaches and the mechanisms behind decellularization techniques and outlines a simplified model for a replacement vascular unit. The current state-of-the-art method used to create decellularized vessel segments is identified. Also, perspectives on future directions to engineer small- (inner diameter >1 mm and <6 mm) to large-caliber (inner diameter >6 mm) vessel substitutes are presented.
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Affiliation(s)
- Xinyu Wang
- Biomedical Engineering and Healthcare Engineering Innovation Center, Khalifa University, Abu Dhabi, United Arab Emirates
- Department of Immunology and Physiology, College of Medicine and Health Sciences, Khalifa University, Abu Dhabi, United Arab Emirates
| | - Vincent Chan
- Biomedical Engineering and Healthcare Engineering Innovation Center, Khalifa University, Abu Dhabi, United Arab Emirates
| | - Peter R. Corridon
- Department of Immunology and Physiology, College of Medicine and Health Sciences, Khalifa University, Abu Dhabi, United Arab Emirates
- Center for Biotechnology, Khalifa University, Abu Dhabi, United Arab Emirates
- *Correspondence: Peter R. Corridon,
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16
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Sembiring YE, Ledyastatin RA, Nurrahmah A, Sulistyaningsih NK, Sinatra JAR, Puruhito I, Suroto H. Comparative Assessment of Various Concentration and Exposure Time of Sodium Dodecyl Sulfate as Decellularization Agents for Small-Vessels Vascular Tissue Engineering. Open Access Maced J Med Sci 2022. [DOI: 10.3889/oamjms.2022.9396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
BACKGROUND: Finding the optimum vascular grafts (VG) to replace damaged blood arteries in cardiac surgery is still a work in progress. To be employed, a tissue-engineered VG (TEVG) must have the appropriate biological and mechanical qualities. Decellularized arteries may be a better TEVG than synthetic grafts because of their natural three-dimensional architecture.
AIM: The goal of this study was to compare different concentrations and times of sodium dodecyl sulfate (SDS) to decellularize tissue to find the best decellularized VG.
METHODS: In all decellularized scaffolds, which are 1% SDS-2 weeks group, hematoxylin and eosin and Masson’s trichrome staining exhibited looser collagen networks and fewer nuclei.
RESULTS: The orientation of collagen fibers was identical to native vascular scaffolds. Collagen I deposition was seen in the immunohistochemistry assay. A tensile strength test revealed that the decellularized scaffold (0.5% SDS for 4 weeks and 0.5% SDS for 2 weeks) had exceeded the native arteries’ maximal strength. In comparison to 1% SDS in 4 weeks treated groups, scanning electron microscopy following decellularization revealed no endothelial cells on the inner side of 1% SDS in 2 weeks group with minimum extracellular matrix damage. The endothelial cells remained marginally visible on the inner side of all 0.5% SDS treated groups. The 3-(4,5-dimethylthiazol-2yl)2,5-diphenyltetrazolium bromide test was used to determine the cytotoxicity of the decellularized scaffolds.
CONCLUSION: This study reveals that exposing a bovine mesenteric artery to 1% SDS for 2 weeks is an excellent procedure for extracting the most acellular VG, potentially serving as a biological scaffold for TEVGs.
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17
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Maleki S, Shamloo A, Kalantarnia F. Tubular TPU/SF nanofibers covered with chitosan-based hydrogels as small-diameter vascular grafts with enhanced mechanical properties. Sci Rep 2022; 12:6179. [PMID: 35418612 PMCID: PMC9008019 DOI: 10.1038/s41598-022-10264-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Accepted: 04/06/2022] [Indexed: 12/15/2022] Open
Abstract
Native grafts such as internal mammary artery and saphenous vein are the main choice for coronary artery bypass graft. However, due to the limitations associated with their availability and rapid failure caused by hyperplasia, small diameter tissue-engineered vascular grafts (TEVGs) with sufficient post-implantation patency are urgently demanded as artificial alternatives. In our previous work, we innovatively fabricated a bilayer vascular graft providing appropriate structural and biological properties using electrospinning and freeze-drying methods. It was proved that the mechanical properties of the proposed graft enhanced in comparison with using either of methods individually. Here, we adopted the same methods and incorporated an anticoagulant internal layer (inner diameter 4 mm), comprised of co-electrospun fibers of silk fibroin (SF) and heparinized thermoplastic polyurethane (TPU), and an external highly porous hydrogel fabricated by freeze-drying method. The electrospun layer exhibited strong mechanical properties including superior elastic modulus (4.92 ± 0.11 MPa), suture retention force (6.73 ± 0.83 N), elongation at break (196 ± 4%), and comparable burst pressure (1140 ± 12 mmHg) while the external hydrogel provided SMCs viability. The heparin was released in a sustain manner over 40 days, and the cytocompatibility and blood compatibility of scaffold were approved using MTT assay and platelet adhesion test. Thus, the proposed graft has a potential to be used as an artificial blood vessel scaffold for later in-vivo transplantation.
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Affiliation(s)
- Sasan Maleki
- School of Mechanical Engineering, Sharif University of Technology, Tehran, Iran.,Stem Cell and Regenerative Medicine Center, Sharif University of Technology, Tehran, Iran
| | - Amir Shamloo
- School of Mechanical Engineering, Sharif University of Technology, Tehran, Iran. .,Stem Cell and Regenerative Medicine Center, Sharif University of Technology, Tehran, Iran.
| | - Farnoosh Kalantarnia
- School of Mechanical Engineering, Sharif University of Technology, Tehran, Iran.,Stem Cell and Regenerative Medicine Center, Sharif University of Technology, Tehran, Iran
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18
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Antunes M, Bonani W, Reis RL, Migliaresi C, Ferreira H, Motta A, Neves NM. Development of alginate-based hydrogels for blood vessel engineering. BIOMATERIALS ADVANCES 2022; 134:112588. [PMID: 35525739 DOI: 10.1016/j.msec.2021.112588] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 11/09/2021] [Accepted: 11/29/2021] [Indexed: 12/12/2022]
Abstract
Vascular diseases are among the primary causes of death worldwide. In serious conditions, replacement of the damaged vessel is required. Autologous grafts are preferred, but their limited availability and difficulty of the harvesting procedures favour synthetic alternatives' use. However, as synthetic grafts may present significant drawbacks, tissue engineering-based solutions are proposed. Herein, tubular hydrogels of alginate combined with collagen type I and/or silk fibroin were prepared by ionotropic gelation using gelatin hydrogel sacrificial moulds loaded with calcium ions (Ca2+). The time of exposure of alginate solutions to Ca2+-loaded gelatin was used to control the wall thickness of the hydrogels (0.47 ± 0.10 mm-1.41 ± 0.21 mm). A second crosslinking step with barium chloride prevented their degradation for a 14 day period and improved mechanical properties by two-fold. Protein leaching tests showed that collagen type I, unlike silk fibroin, was strongly incorporated in the hydrogels. The presence of silk fibroin in the alginate matrix, containing or not collagen, did not significantly improve hydrogels' properties. Conversely, hydrogels enriched only with collagen were able to better support EA.hy926 and MRC-5 cells' growth and characteristic phenotype. These results suggest that a two-step crosslinking procedure combined with the use of collagen type I allow for producing freestanding vascular substitutes with tuneable properties in terms of size, shape and wall thickness.
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Affiliation(s)
- Margarida Antunes
- 3B's Research Group, I3Bs-Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal; ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Walter Bonani
- Department of Industrial Engineering, University of Trento, via Sommarive, 9, 38123 Trento, Italy; BIOtech Research Centre, University of Trento, via delle Regole 101, 38123 Mattarello, Trento, Italy
| | - Rui L Reis
- 3B's Research Group, I3Bs-Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal; ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Claudio Migliaresi
- Department of Industrial Engineering, University of Trento, via Sommarive, 9, 38123 Trento, Italy; BIOtech Research Centre, University of Trento, via delle Regole 101, 38123 Mattarello, Trento, Italy
| | - Helena Ferreira
- 3B's Research Group, I3Bs-Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal; ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Antonella Motta
- Department of Industrial Engineering, University of Trento, via Sommarive, 9, 38123 Trento, Italy; BIOtech Research Centre, University of Trento, via delle Regole 101, 38123 Mattarello, Trento, Italy
| | - Nuno M Neves
- 3B's Research Group, I3Bs-Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal; ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal.
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19
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Weekes A, Bartnikowski N, Pinto N, Jenkins J, Meinert C, Klein TJ. Biofabrication of small diameter tissue-engineered vascular grafts. Acta Biomater 2022; 138:92-111. [PMID: 34781026 DOI: 10.1016/j.actbio.2021.11.012] [Citation(s) in RCA: 40] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 10/21/2021] [Accepted: 11/09/2021] [Indexed: 12/12/2022]
Abstract
Current clinical treatment strategies for the bypassing of small diameter (<6 mm) blood vessels in the management of cardiovascular disease frequently fail due to a lack of suitable autologous grafts, as well as infection, thrombosis, and intimal hyperplasia associated with synthetic grafts. The rapid advancement of 3D printing and regenerative medicine technologies enabling the manufacture of biological, tissue-engineered vascular grafts (TEVGs) with the ability to integrate, remodel, and repair in vivo, promises a paradigm shift in cardiovascular disease management. This review comprehensively covers current state-of-the-art biofabrication technologies for the development of biomimetic TEVGs. Various scaffold based additive manufacturing methods used in vascular tissue engineering, including 3D printing, bioprinting, electrospinning and melt electrowriting, are discussed and assessed against the biomechanical and functional requirements of human vasculature, while the efficacy of decellularization protocols currently applied to engineered and native vessels are evaluated. Further, we provide interdisciplinary insight into the outlook of regenerative medicine for the development of vascular grafts, exploring key considerations and perspectives for the successful clinical integration of evolving technologies. It is expected that continued advancements in microscale additive manufacturing, biofabrication, tissue engineering and decellularization will culminate in the development of clinically viable, off-the-shelf TEVGs for small diameter applications in the near future. STATEMENT OF SIGNIFICANCE: Current clinical strategies for the management of cardiovascular disease using small diameter vessel bypassing procedures are inadequate, with up to 75% of synthetic grafts failing within 3 years of implantation. It is this critically important clinical problem that researchers in the field of vascular tissue engineering and regenerative medicine aim to alleviate using biofabrication methods combining additive manufacturing, biomaterials science and advanced cellular biology. While many approaches facilitate the development of bioengineered constructs which mimic the structure and function of native blood vessels, several challenges must still be overcome for clinical translation of the next generation of tissue-engineered vascular grafts.
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Affiliation(s)
- Angus Weekes
- Centre for Biomedical Technologies, Queensland University of Technology (QUT), Brisbane, QLD, 4059, Australia; School of Mechanical, Medical and Process Engineering, Faculty of Engineering, Queensland University of Technology (QUT), Brisbane, QLD, 4059, Australia; Herston Biofabrication Institute, Metro North Hospital and Health Services, Herston, QLD, 4006, Australia.
| | - Nicole Bartnikowski
- Centre for Biomedical Technologies, Queensland University of Technology (QUT), Brisbane, QLD, 4059, Australia; School of Mechanical, Medical and Process Engineering, Faculty of Engineering, Queensland University of Technology (QUT), Brisbane, QLD, 4059, Australia; Critical Care Research Group, The Prince Charles Hospital, Brisbane, QLD, 4035, Australia.
| | - Nigel Pinto
- Herston Biofabrication Institute, Metro North Hospital and Health Services, Herston, QLD, 4006, Australia; Department of Vascular Surgery, The Royal Brisbane and Women's Hospital, Herston, QLD, 4006, Australia.
| | - Jason Jenkins
- Herston Biofabrication Institute, Metro North Hospital and Health Services, Herston, QLD, 4006, Australia; Department of Vascular Surgery, The Royal Brisbane and Women's Hospital, Herston, QLD, 4006, Australia.
| | - Christoph Meinert
- Centre for Biomedical Technologies, Queensland University of Technology (QUT), Brisbane, QLD, 4059, Australia; School of Mechanical, Medical and Process Engineering, Faculty of Engineering, Queensland University of Technology (QUT), Brisbane, QLD, 4059, Australia; Herston Biofabrication Institute, Metro North Hospital and Health Services, Herston, QLD, 4006, Australia.
| | - Travis J Klein
- Centre for Biomedical Technologies, Queensland University of Technology (QUT), Brisbane, QLD, 4059, Australia; School of Mechanical, Medical and Process Engineering, Faculty of Engineering, Queensland University of Technology (QUT), Brisbane, QLD, 4059, Australia.
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20
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Santisteban-Espejo A, Martin-Piedra MA, Campos A, Moran-Sanchez J, Cobo MJ, Pacheco-Serrano AI, Moral-Munoz JA. Information and Scientific Impact of Advanced Therapies in the Age of Mass Media: Altmetrics-Based Analysis of Tissue Engineering. J Med Internet Res 2021; 23:e25394. [PMID: 34842548 PMCID: PMC8665381 DOI: 10.2196/25394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 02/23/2021] [Accepted: 07/05/2021] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Tissue engineering (TE) constitutes a multidisciplinary field aiming to construct artificial tissues to regenerate end-stage organs. Its development has taken place since the last decade of the 20th century, entailing a clinical revolution. TE research groups have worked and shared relevant information in the mass media era. Thus, it would be interesting to study the online dimension of TE research and to compare it with traditional measures of scientific impact. OBJECTIVE The objective of this study was to evaluate the online dimension of TE documents from 2012 to 2018 using metadata obtained from the Web of Science (WoS) and Altmetric and to develop a prediction equation for the impact of TE documents from altmetric scores. METHODS We analyzed 10,112 TE documents through descriptive and statistical methods. First, the TE temporal evolution was exposed for WoS and 15 online platforms (news, blogs, policy, Twitter, patents, peer review, Weibo, Facebook, Wikipedia, Google, Reddit, F1000, Q&A, video, and Mendeley Readers). The 10 most cited TE original articles were ranked according to the normalized WoS citations and the normalized Altmetric Attention Score. Second, to better comprehend the TE online framework, correlation and factor analyses were performed based on the suitable results previously obtained for the Bartlett sphericity and Kaiser-Meyer-Olkin tests. Finally, the linear regression model was applied to elucidate the relation between academics and online media and to construct a prediction equation for TE from altmetrics data. RESULTS TE dynamic shows an upward trend in WoS citations, Twitter, Mendeley Readers, and Altmetric Scores. However, WoS and Altmetric rankings for the most cited documents clearly differ. When compared, the best correlation results were obtained for Mendeley Readers and WoS (ρ=0.71). In addition, the factor analysis identified 6 factors that could explain the previously observed differences between academic institutions and the online platforms evaluated. At this point, the mathematical model constructed is able to predict and explain more than 40% of TE WoS citations from Altmetric scores. CONCLUSIONS Scientific information related to the construction of bioartificial tissues increasingly reaches society through different online media. Because the focus of TE research importantly differs when the academic institutions and online platforms are compared, basic and clinical research groups, academic institutions, and health politicians should make a coordinated effort toward the design and implementation of adequate strategies for information diffusion and population health education.
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Affiliation(s)
- Antonio Santisteban-Espejo
- Department of Pathology, Puerta del Mar University Hospital, Cadiz, Spain.,Institute of Research and Innovation in Biomedical Sciences of the Province of Cadiz (INiBICA), University of Cadiz, Cadiz, Spain
| | | | - Antonio Campos
- Department of Histology, Tissue Engineering Group, University of Granada, Granada, Spain
| | - Julia Moran-Sanchez
- Department of Medicine, University of Cadiz, Cadiz, Spain.,Department of Hematology and Hemotherapy, Puerta del Mar University Hospital, Cadiz, Spain
| | - Manuel J Cobo
- Department of Computer Science and Engineering, University of Cadiz, Cadiz, Spain
| | | | - Jose A Moral-Munoz
- Institute of Research and Innovation in Biomedical Sciences of the Province of Cadiz (INiBICA), University of Cadiz, Cadiz, Spain.,Department of Nursing and Physiotherapy, University of Cadiz, Cadiz, Spain
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21
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Bhusal A, Dogan E, Nguyen HA, Labutina O, Nieto D, Khademhosseini A, Miri AK. Multi-material digital light processing bioprinting of hydrogel-based microfluidic chips. Biofabrication 2021; 14:10.1088/1758-5090/ac2d78. [PMID: 34614486 PMCID: PMC10700126 DOI: 10.1088/1758-5090/ac2d78] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Accepted: 10/06/2021] [Indexed: 11/12/2022]
Abstract
Recent advancements in digital-light-processing (DLP)-based bioprinting and hydrogel engineering have enabled novel developments in organs-on-chips. In this work, we designed and developed a multi-material, DLP-based bioprinter for rapid, one-step prototyping of hydrogel-based microfluidic chips. A composite hydrogel bioink based on poly-ethylene-glycol-diacrylate (PEGDA) and gelatin methacryloyl (GelMA) was optimized through varying the bioprinting parameters such as light exposure time, bioink composition, and layer thickness. We showed a wide range of mechanical properties of the microfluidic chips for various ratios of PEGDA:GelMA. Microfluidic features of hydrogel-based chips were then tested using dynamic flow experiments. Human-derived tumor cells were encapsulated in 3D bioprinted structures to demonstrate their bioactivity and cell-friendly environment. Cell seeding experiments then validated the efficacy of the selected bioinks for vascularized micro-tissues. Our biofabrication approach offers a useful tool for the rapid integration of micro-tissue models into organs-on-chips and high-throughput drug screening platforms.
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Affiliation(s)
- Anant Bhusal
- Biofabrication Lab, Department of Mechanical Engineering, Rowan University, Glassboro, NJ 08028
| | - Elvan Dogan
- Biofabrication Lab, Department of Mechanical Engineering, Rowan University, Glassboro, NJ 08028
| | - Hai-Anh Nguyen
- Biofabrication Lab, Department of Mechanical Engineering, Rowan University, Glassboro, NJ 08028
| | - Olga Labutina
- Biofabrication Lab, Department of Mechanical Engineering, Rowan University, Glassboro, NJ 08028
| | - Daniel Nieto
- Photonics4life Research Group, Department of Physics, University of Santiago de Compostela, A Coruña, Spain
| | - Ali Khademhosseini
- Terasaki Institute for Biomedical Innovation (TIBI), Los Angeles, CA 90024, USA
- Department of Radiology and Department of Chemical and Biomolecular Engineering, University of California-Los Angeles, Los Angeles, CA 90095 USA
- Department of Chemical and Biomolecular Engineering, Henry Samueli School of Engineering and Applied Sciences, University of California – Los Angeles, Los Angeles, CA 90095, USA
| | - Amir K. Miri
- Biofabrication Lab, Department of Mechanical Engineering, Rowan University, Glassboro, NJ 08028
- Department of Biomedical Engineering, Rowan University, Glassboro, NJ 08028, USA
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22
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Bioengineering silk into blood vessels. Biochem Soc Trans 2021; 49:2271-2286. [PMID: 34495327 DOI: 10.1042/bst20210359] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 08/05/2021] [Accepted: 08/11/2021] [Indexed: 11/17/2022]
Abstract
The rising incidence of cardiovascular disease has increased the demand for small diameter (<6 mm) synthetic vascular grafts for use in bypass surgery. Clinically available synthetic grafts (polyethylene terephthalate and expanded polytetrafluorethylene) are incredibly strong, but also highly hydrophobic and inelastic, leading to high rates of failure when used for small diameter bypass. The poor clinical outcomes of commercial synthetic grafts in this setting have driven significant research in search of new materials that retain favourable mechanical properties but offer improved biocompatibility. Over the last several decades, silk fibroin derived from Bombyx mori silkworms has emerged as a promising biomaterial for use in vascular applications. Progress has been driven by advances in silk manufacturing practices which have allowed unprecedented control over silk strength, architecture, and the ensuing biological response. Silk can now be manufactured to mimic the mechanical properties of native arteries, rapidly recover the native endothelial cell layer lining vessels, and direct positive vascular remodelling through the regulation of local inflammatory responses. This review summarises the advances in silk purification, processing and functionalisation which have allowed the production of robust vascular grafts with promise for future clinical application.
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23
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New Method for Preparing Small-Caliber Artificial Blood Vessel with Controllable Microstructure on the Inner Wall Based on Additive Material Composite Molding. MICROMACHINES 2021; 12:mi12111312. [PMID: 34832724 PMCID: PMC8622980 DOI: 10.3390/mi12111312] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 10/22/2021] [Accepted: 10/23/2021] [Indexed: 11/28/2022]
Abstract
The diameter of most blood vessels in cardiovascular and peripheral vascular system is less than 6 mm. Because the inner diameter of such vessels is small, a built-in stent often leads to thrombosis and other problems. It is an important goal to replace it directly with artificial vessels. This paper creatively proposed a preparation method of a small-diameter artificial vascular graft which can form a controllable microstructure on the inner wall and realize a multi-material composite. On the one hand, the inner wall of blood vessels containing direct writing structure is constructed by electrostatic direct writing and micro-imprinting technology to regulate cell behavior and promote endothelialization; on the other hand, the outer wall of blood vessels was prepared by electrospinning PCL to ensure the stability of mechanical properties of composite grafts. By optimizing the key parameters of the graft, a small-diameter artificial blood vessel with controllable microstructure on the inner wall is finally prepared. The corresponding performance characterization experimental results show that it has advantages in structure, mechanical properties, and promoting endothelialization.
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24
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Kandi R, Pandey PM. Statistical modelling and optimization of print quality and mechanical properties of customized tubular scaffolds fabricated using solvent-based extrusion 3D printing process. Proc Inst Mech Eng H 2021; 235:1421-1438. [PMID: 34269125 DOI: 10.1177/09544119211032012] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Tissue-engineered tubular scaffolds offer huge potential to heal or replace the diseased organ parts like blood vessels, trachea, oesophagus and ureter. However, manufacturing these scaffolds in various scales and shapes is always challenging and requires progressive technology. Developing a flexible and accurate manufacturing method is a major developmental direction in the field of tubular scaffold fabrication. In this context, the present work presents a novel solvent-based extrusion 3D printing which allows extruding over a rotating mandrel to fabricate tubular scaffolds of polycaprolactone (PCL) and polyurethane (PU). Experimental runs were planned as per the central composite design (CCD) to evaluate the effects of input parameters like infill density, layer thickness, print speed and percentage of PU on the output responses like printing quality and mechanical characteristics. The printing quality was quantified by measuring average surface roughness of the printed scaffolds and mechanical properties were evaluated by measuring radial compressive load, and percentage of elongation. The experimental investigations revealed that printing quality was improved at higher infill densities and was deteriorated at higher print speeds and layer thicknesses. Similarly, the radial compressive load was improved with the increase in infill density and was decreased with an increase in layer thickness, print speed and percentage of PU. The percentage of elongation was found to improve at higher infill densities and percentages of PU and was reduced with an increase in layer thickness and print speed. Additionally, a multi-objective optimization using Genetic Algorithm was used to evaluate the optimum conditions to minimize surface roughness and maximizing radial compression load and percentage of elongation. Finally, a case study was performed by comparing the mechanical properties of tubular organs and scaffolds from the existing reports and results of the present work.
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Affiliation(s)
- Rudranarayan Kandi
- Department of Mechanical Engineering, Indian Institute of Technology, New Delhi, Delhi, India
| | - Pulak Mohan Pandey
- Department of Mechanical Engineering, Indian Institute of Technology, New Delhi, Delhi, India
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25
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Enhancing Kidney Vasculature in Tissue Engineering-Current Trends and Approaches: A Review. Biomimetics (Basel) 2021; 6:biomimetics6020040. [PMID: 34208664 PMCID: PMC8293130 DOI: 10.3390/biomimetics6020040] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 06/08/2021] [Accepted: 06/11/2021] [Indexed: 11/17/2022] Open
Abstract
Chronic kidney diseases are a leading cause of fatalities around the world. As the most sought-after organ for transplantation, the kidney is of immense importance in the field of tissue engineering. The primary obstacle to the development of clinically relevant tissue engineered kidneys is precise vascularization due to the organ's large size and complexity. Current attempts at whole-kidney tissue engineering include the repopulation of decellularized kidney extracellular matrices or vascular corrosion casts, but these approaches do not eliminate the need for a donor organ. Stem cell-based approaches, such as kidney organoids vascularized in microphysiological systems, aim to construct a kidney without the need for organ donation. These organ-on-a-chip models show complex, functioning kidney structures, albeit at a small scale. Novel methodologies for developing engineered scaffolds will allow for improved differentiation of kidney stem cells and organoids into larger kidney grafts with clinical applications. While currently, kidney tissue engineering remains mostly limited to individual renal structures or small organoids, further developments in vascularization techniques, with technologies such as organoids in microfluidic systems, could potentially open doors for a large-scale growth of whole engineered kidneys for transplantation.
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26
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Byrne O, Coulter F, Roche ET, O'Cearbhaill ED. In silico design of additively manufacturable composite synthetic vascular conduits and grafts with tuneable compliance. Biomater Sci 2021; 9:4343-4355. [PMID: 33724267 DOI: 10.1039/d0bm02169e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Benchtop testing of endovascular medical devices under accurately simulated physiological conditions is a critical part of device evaluation prior to clinical assessment. Currently, glass, acrylic and silicone vascular models are predominantly used as anatomical simulator test beds for in vitro testing. However, most current models lack the ability to mimic the non-linear radial compliance of native vessels and are typically limited to being compliance-matched at a single mean pressure comparison point or not at all. Hence, a degree of caution needs to be shown when analysing results from such models under simulated physiological or pathophysiological conditions. Similarly, the clinical translation of proposed biomimetic compliance-matched vascular grafts has undoubtedly been curtailed due to performance and material limitations. Here, we propose a new design for synthetic vessels where compliance can be precisely modulated across a wide physiological pressure range by customising design parameters. Building on previously demonstrated methods of 3D printing composite compliant cylindrical structures, we demonstrate proof of principle in creating composite vascular constructs designed via a finite element model. Our constructs are 3D printable and consist of a soft silicone matrix with embedded polyurethane fibres. The fibre layer consists of circumferential sinusoidal waves with an amplitude that can be altered to result in tuneable internal radial compliances of 5.2-15.9%/mmHg × 10-2 at a mean pressure of 100 mmHg. Importantly, the design presented here allows preservation of the non-linear exponentially decaying compliance curve of native arteries and veins with an increasing mean pressure. This model offers a design toolbox for 3D printable vascular models that offer biomimetic compliance. The robust nature of this model will lead to rapidly accelerating the design process for biomimetic vascular anatomical simulators, lumped parameter model flow loops, endovascular device benchtop testbeds, and compliance-matched synthetic grafts.
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Affiliation(s)
- Oisín Byrne
- School of Mechanical and Materials Engineering, UCD Centre for Biomedical Engineering, University College Dublin, Belfield, Ireland and CÚRAM, the SFI Research Centre for Medical Devices, Ireland
| | - Fergal Coulter
- School of Mechanical and Materials Engineering, UCD Centre for Biomedical Engineering, University College Dublin, Belfield, Ireland and Complex Materials, Department of Materials, ETH Zurich, Zurich, Switzerland
| | - Ellen T Roche
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA and Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Eoin D O'Cearbhaill
- School of Mechanical and Materials Engineering, UCD Centre for Biomedical Engineering, University College Dublin, Belfield, Ireland and CÚRAM, the SFI Research Centre for Medical Devices, Ireland
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27
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Frazão LP, Fernandes AM, Oliveira C, Martins A, Silva TH, Vieira de Castro J, Nogueira-Silva C, Neves NM. New Vascular Graft Using the Decellularized Human Chorion Membrane. ACS Biomater Sci Eng 2021; 7:3423-3433. [PMID: 34097827 DOI: 10.1021/acsbiomaterials.1c00293] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The increase of both arterial occlusive diseases and coronary heart diseases leads to a higher demand for small-diameter vascular grafts (<6 mm). The gold standard for small-diameter vessel replacement is the use of autologous veins. Nevertheless, up to 30% of these patients need to use vascular grafts. Although synthetic polymers have been successfully used for the replacement of large-diameter vascular grafts (>6 mm), they are associated with thrombosis, intimal hyperplasia, calcification, and chronic inflammation when used as small-diameter vascular grafts. Therefore, natural materials have been studied for this application. In this study, a decellularized human chorion membrane (dHCM) vascular graft with a 3-4 mm diameter was created. Herein, the biocompatibility of dHCM with endothelial cells was demonstrated in vitro and ex ovo. Blood biocompatibility of dHCM was also shown by studying plasma protein adsorption, platelet adhesion and activation, and its hemolytic potential. Furthermore, dHCM antibacterial properties against Staphylococcus aureus were also studied. In summary, the dHCM reticular layer side presented all the needed characteristics to be used in the inner side of a vascular graft. Additionally, the mechanical properties of the dHCM tubular construct were studied, being similar to the ones of the saphenous vein, the gold standard for autologous small-diameter vessel replacement.
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Affiliation(s)
- Laura P Frazão
- I3B's-Research Institute on Biomaterials, Biodegradables and Biomimetics of University of Minho: 3Bs Research Group, 4805-017 Guimarães, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Ana M Fernandes
- I3B's-Research Institute on Biomaterials, Biodegradables and Biomimetics of University of Minho: 3Bs Research Group, 4805-017 Guimarães, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Catarina Oliveira
- I3B's-Research Institute on Biomaterials, Biodegradables and Biomimetics of University of Minho: 3Bs Research Group, 4805-017 Guimarães, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Albino Martins
- I3B's-Research Institute on Biomaterials, Biodegradables and Biomimetics of University of Minho: 3Bs Research Group, 4805-017 Guimarães, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Tiago H Silva
- I3B's-Research Institute on Biomaterials, Biodegradables and Biomimetics of University of Minho: 3Bs Research Group, 4805-017 Guimarães, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Joana Vieira de Castro
- I3B's-Research Institute on Biomaterials, Biodegradables and Biomimetics of University of Minho: 3Bs Research Group, 4805-017 Guimarães, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Cristina Nogueira-Silva
- ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal.,Life and Health Sciences Research Institute, School of Medicine, University of Minho, 4710-057 Braga, Portugal.,Department of Obstetrics and Gynecology, Hospital de Braga, 4710-243 Braga, Portugal
| | - Nuno M Neves
- I3B's-Research Institute on Biomaterials, Biodegradables and Biomimetics of University of Minho: 3Bs Research Group, 4805-017 Guimarães, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
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28
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Jiang T, Ran B, Guo Q, Zhang R, Duan S, Zhong K, Wen H, Shao Y, Aji T. Use of the ligamentum teres hepatis for outflow reconstruction during ex vivo liver resection and autotransplantation in patients with hepatic alveolar echinococcosis: A case series of 24 patients. Surgery 2021; 170:822-830. [PMID: 33994007 DOI: 10.1016/j.surg.2021.03.040] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 03/03/2021] [Accepted: 03/15/2021] [Indexed: 02/07/2023]
Abstract
BACKGROUND Patients with extensive hepatic alveolar echinococcosis might require ex vivo liver resection and autotransplantation to remove the lesion. Patients with extensive vascular invasion will need reconstruction, but the selection of the proper graft is complicated. This study aimed to investigate the effectiveness and adverse events of using the ligamentum teres hepatis as a vascular replacement graft in ex vivo liver resection and autotransplantation. METHODS This was a retrospective case series of patients with hepatic alveolar echinococcosis who underwent ex vivo liver resection and autotransplantation between August 2010 and October 2018 and in whom the ligamentum teres hepatis was used to repair the remnant liver. The operative outcomes, recurrence, and survival were examined. RESULTS Twenty-four patients were included (10 men, 14 women). The anhepatic period was 290 to 672 minutes (median of 450 minutes). The ratio of the remnant liver volume to the standard liver volume was 0.43 to 0.97 (median of 0.71). The blood loss was 1,000 (500-5,000) mL. The postoperative hospital stay was 23 (1-85) days. Of the 24 patients, 3 died after the operation, but those deaths were unrelated to liver vascular complications. CONCLUSION The ligamentum teres hepatis could be used as a vascular replacement graft in ex vivo liver resection and autotransplantation. It has the advantages of convenient specimen extraction, no donor site injury, and no immunological rejection, which has promising clinical application prospects.
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Affiliation(s)
- Tiemin Jiang
- State Key Laboratory of Pathogenesis, Prevention, and Management of High Incidence Diseases in Central Asia, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China; Department of Hepatobiliary and Echinococcosis Surgery, Digestive and Vascular Surgery Center, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China; Xinjiang Uyghur Autonomous Region Key Laboratory of Echinococcosis, Clinical Medical Institute, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - Bo Ran
- State Key Laboratory of Pathogenesis, Prevention, and Management of High Incidence Diseases in Central Asia, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China; Department of Hepatobiliary and Echinococcosis Surgery, Digestive and Vascular Surgery Center, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China; Xinjiang Uyghur Autonomous Region Key Laboratory of Echinococcosis, Clinical Medical Institute, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - Qiang Guo
- State Key Laboratory of Pathogenesis, Prevention, and Management of High Incidence Diseases in Central Asia, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China; Department of Hepatobiliary and Echinococcosis Surgery, Digestive and Vascular Surgery Center, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China; Xinjiang Uyghur Autonomous Region Key Laboratory of Echinococcosis, Clinical Medical Institute, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - Ruiqing Zhang
- State Key Laboratory of Pathogenesis, Prevention, and Management of High Incidence Diseases in Central Asia, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China; Department of Hepatobiliary and Echinococcosis Surgery, Digestive and Vascular Surgery Center, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China; Xinjiang Uyghur Autonomous Region Key Laboratory of Echinococcosis, Clinical Medical Institute, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - Shuai Duan
- State Key Laboratory of Pathogenesis, Prevention, and Management of High Incidence Diseases in Central Asia, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China; Department of Hepatobiliary and Echinococcosis Surgery, Digestive and Vascular Surgery Center, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China; Xinjiang Uyghur Autonomous Region Key Laboratory of Echinococcosis, Clinical Medical Institute, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - Kai Zhong
- State Key Laboratory of Pathogenesis, Prevention, and Management of High Incidence Diseases in Central Asia, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China; Department of Hepatobiliary and Echinococcosis Surgery, Digestive and Vascular Surgery Center, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China; Xinjiang Uyghur Autonomous Region Key Laboratory of Echinococcosis, Clinical Medical Institute, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - Hao Wen
- State Key Laboratory of Pathogenesis, Prevention, and Management of High Incidence Diseases in Central Asia, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China; Department of Hepatobiliary and Echinococcosis Surgery, Digestive and Vascular Surgery Center, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China; Xinjiang Uyghur Autonomous Region Key Laboratory of Echinococcosis, Clinical Medical Institute, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - Yingmei Shao
- State Key Laboratory of Pathogenesis, Prevention, and Management of High Incidence Diseases in Central Asia, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China; Department of Hepatobiliary and Echinococcosis Surgery, Digestive and Vascular Surgery Center, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China; Xinjiang Uyghur Autonomous Region Key Laboratory of Echinococcosis, Clinical Medical Institute, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - Tuerganaili Aji
- State Key Laboratory of Pathogenesis, Prevention, and Management of High Incidence Diseases in Central Asia, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China; Department of Hepatobiliary and Echinococcosis Surgery, Digestive and Vascular Surgery Center, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China; Xinjiang Uyghur Autonomous Region Key Laboratory of Echinococcosis, Clinical Medical Institute, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China.
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29
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Bates NM, Heidenreich HE, Fallon ME, Yao Y, Yim EKF, Hinds MT, Anderson DEJ. Bioconjugation of a Collagen-Mimicking Peptide Onto Poly(vinyl alcohol) Encourages Endothelialization While Minimizing Thrombosis. Front Bioeng Biotechnol 2021; 8:621768. [PMID: 33425883 PMCID: PMC7793657 DOI: 10.3389/fbioe.2020.621768] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Accepted: 11/30/2020] [Indexed: 12/26/2022] Open
Abstract
Poly(vinyl alcohol) hydrogel, PVA, is a suitable material for small-diameter vascular grafting. However, the bioinert properties of the material do not allow for in situ endothelialization, which is needed to combat common graft failure mechanisms, such as intimal hyperplasia and thrombosis. In this work, the surface of planar and tubular PVA was covalently modified with a collagen-mimicking peptide, GFPGER. The surface of modified PVA was characterized by measuring contact angle and x-ray photoelectron spectroscopy. Endothelial cell attachment to GFPGER-modified PVA was quantified and qualitatively examined using immunohistochemical staining. Then, in vitro hemocompatibility testing was performed by quantifying platelet attachment, coagulation factor XII activation, and initiation of fibrin formation. Finally, an established ex vivo, non-human primate model was employed to examine platelet attachment and fibrin formation under non-anticoagulated, whole blood flow conditions. GFPGER-modified PVA supported increased EC attachment. In vitro initiation of fibrin formation on the modified material was significantly delayed. Ex vivo thrombosis assessment showed a reduction in platelet attachment and fibrin formation on GFPGER-modified PVA. Overall, GFPGER-modified PVA encouraged cell attachment while maintaining the material’s hemocompatibility. This work is a significant step toward the development and characterization of a modified-hydrogel surface to improve endothelialization while reducing platelet attachment.
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Affiliation(s)
- Novella M Bates
- Department of Biomedical Engineering, Oregon Health & Science University, Portland, OR, United States
| | - Heather E Heidenreich
- Department of Biomedical Engineering, Oregon Health & Science University, Portland, OR, United States
| | - Meghan E Fallon
- Department of Biomedical Engineering, Oregon Health & Science University, Portland, OR, United States
| | - Yuan Yao
- Department of Chemical Engineering, University of Waterloo, Waterloo, ON, Canada
| | - Evelyn K F Yim
- Department of Chemical Engineering, University of Waterloo, Waterloo, ON, Canada
| | - Monica T Hinds
- Department of Biomedical Engineering, Oregon Health & Science University, Portland, OR, United States
| | - Deirdre E J Anderson
- Department of Biomedical Engineering, Oregon Health & Science University, Portland, OR, United States
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30
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Xu S, Li Q, Pan H, Dai Q, Feng Q, Yu C, Zhang X, Liang Z, Dong H, Cao X. Tubular Silk Fibroin/Gelatin-Tyramine Hydrogel with Controllable Layer Structure and Its Potential Application for Tissue Engineering. ACS Biomater Sci Eng 2020; 6:6896-6905. [DOI: 10.1021/acsbiomaterials.0c01183] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Sheng Xu
- Department of Biomedical Engineering, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, People’s Republic of China
- National Engineering Research Center for Tissue Restoration and Reconstruction (NERC-TRR), South China University of Technology, Guangzhou 510641, People’s Republic of China
- Key Laboratory of Biomedical Engineering of Guangdong Province, South China University of Technology, Guangzhou 510641, People’s Republic of China
- Key Laboratory of Biomedical Materials and Engineering of the Ministry of Education, South China University of Technology, Guangzhou 510006, People’s Republic of China
- Innovation Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, People’s Republic of China
| | - Qingtao Li
- School of Medicine, South China University of Technology, Guangzhou 510641, People’s Republic of China
- National Engineering Research Center for Tissue Restoration and Reconstruction (NERC-TRR), South China University of Technology, Guangzhou 510641, People’s Republic of China
- Key Laboratory of Biomedical Engineering of Guangdong Province, South China University of Technology, Guangzhou 510641, People’s Republic of China
| | - Haotian Pan
- Department of Biomedical Engineering, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, People’s Republic of China
- National Engineering Research Center for Tissue Restoration and Reconstruction (NERC-TRR), South China University of Technology, Guangzhou 510641, People’s Republic of China
- Key Laboratory of Biomedical Engineering of Guangdong Province, South China University of Technology, Guangzhou 510641, People’s Republic of China
- Key Laboratory of Biomedical Materials and Engineering of the Ministry of Education, South China University of Technology, Guangzhou 510006, People’s Republic of China
- Innovation Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, People’s Republic of China
| | - Qiyuan Dai
- Department of Biomedical Engineering, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, People’s Republic of China
- National Engineering Research Center for Tissue Restoration and Reconstruction (NERC-TRR), South China University of Technology, Guangzhou 510641, People’s Republic of China
- Key Laboratory of Biomedical Engineering of Guangdong Province, South China University of Technology, Guangzhou 510641, People’s Republic of China
- Key Laboratory of Biomedical Materials and Engineering of the Ministry of Education, South China University of Technology, Guangzhou 510006, People’s Republic of China
- Innovation Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, People’s Republic of China
| | - Qi Feng
- Department of Biomedical Engineering, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, People’s Republic of China
- National Engineering Research Center for Tissue Restoration and Reconstruction (NERC-TRR), South China University of Technology, Guangzhou 510641, People’s Republic of China
- Key Laboratory of Biomedical Engineering of Guangdong Province, South China University of Technology, Guangzhou 510641, People’s Republic of China
- Key Laboratory of Biomedical Materials and Engineering of the Ministry of Education, South China University of Technology, Guangzhou 510006, People’s Republic of China
- Innovation Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, People’s Republic of China
| | - Chenxi Yu
- Department of Biomedical Engineering, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, People’s Republic of China
- National Engineering Research Center for Tissue Restoration and Reconstruction (NERC-TRR), South China University of Technology, Guangzhou 510641, People’s Republic of China
- Key Laboratory of Biomedical Engineering of Guangdong Province, South China University of Technology, Guangzhou 510641, People’s Republic of China
- Key Laboratory of Biomedical Materials and Engineering of the Ministry of Education, South China University of Technology, Guangzhou 510006, People’s Republic of China
- Innovation Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, People’s Republic of China
| | - Xiaohua Zhang
- Department of Biomedical Engineering, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, People’s Republic of China
- National Engineering Research Center for Tissue Restoration and Reconstruction (NERC-TRR), South China University of Technology, Guangzhou 510641, People’s Republic of China
- Key Laboratory of Biomedical Engineering of Guangdong Province, South China University of Technology, Guangzhou 510641, People’s Republic of China
- Key Laboratory of Biomedical Materials and Engineering of the Ministry of Education, South China University of Technology, Guangzhou 510006, People’s Republic of China
- Innovation Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, People’s Republic of China
| | - Zhibin Liang
- Department of Biomedical Engineering, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, People’s Republic of China
- National Engineering Research Center for Tissue Restoration and Reconstruction (NERC-TRR), South China University of Technology, Guangzhou 510641, People’s Republic of China
- Key Laboratory of Biomedical Engineering of Guangdong Province, South China University of Technology, Guangzhou 510641, People’s Republic of China
- Key Laboratory of Biomedical Materials and Engineering of the Ministry of Education, South China University of Technology, Guangzhou 510006, People’s Republic of China
- Innovation Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, People’s Republic of China
| | - Hua Dong
- Department of Biomedical Engineering, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, People’s Republic of China
- National Engineering Research Center for Tissue Restoration and Reconstruction (NERC-TRR), South China University of Technology, Guangzhou 510641, People’s Republic of China
- Key Laboratory of Biomedical Engineering of Guangdong Province, South China University of Technology, Guangzhou 510641, People’s Republic of China
- Key Laboratory of Biomedical Materials and Engineering of the Ministry of Education, South China University of Technology, Guangzhou 510006, People’s Republic of China
- Innovation Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, People’s Republic of China
| | - Xiaodong Cao
- Department of Biomedical Engineering, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, People’s Republic of China
- National Engineering Research Center for Tissue Restoration and Reconstruction (NERC-TRR), South China University of Technology, Guangzhou 510641, People’s Republic of China
- Key Laboratory of Biomedical Engineering of Guangdong Province, South China University of Technology, Guangzhou 510641, People’s Republic of China
- Key Laboratory of Biomedical Materials and Engineering of the Ministry of Education, South China University of Technology, Guangzhou 510006, People’s Republic of China
- Innovation Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, People’s Republic of China
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Davaapil H, Shetty DK, Sinha S. Aortic "Disease-in-a-Dish": Mechanistic Insights and Drug Development Using iPSC-Based Disease Modeling. Front Cell Dev Biol 2020; 8:550504. [PMID: 33195187 PMCID: PMC7655792 DOI: 10.3389/fcell.2020.550504] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Accepted: 10/08/2020] [Indexed: 12/24/2022] Open
Abstract
Thoracic aortic diseases, whether sporadic or due to a genetic disorder such as Marfan syndrome, lack effective medical therapies, with limited translation of treatments that are highly successful in mouse models into the clinic. Patient-derived induced pluripotent stem cells (iPSCs) offer the opportunity to establish new human models of aortic diseases. Here we review the power and potential of these systems to identify cellular and molecular mechanisms underlying disease and discuss recent advances, such as gene editing, and smooth muscle cell embryonic lineage. In particular, we discuss the practical aspects of vascular smooth muscle cell derivation and characterization, and provide our personal insights into the challenges and limitations of this approach. Future applications, such as genotype-phenotype association, drug screening, and precision medicine are discussed. We propose that iPSC-derived aortic disease models could guide future clinical trials via “clinical-trials-in-a-dish”, thus paving the way for new and improved therapies for patients.
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Affiliation(s)
- Hongorzul Davaapil
- Wellcome-MRC Cambridge Stem Cell Institute, Jeffrey Cheah Biomedical Centre, Cambridge, United Kingdom
| | - Deeti K Shetty
- Wellcome-MRC Cambridge Stem Cell Institute, Jeffrey Cheah Biomedical Centre, Cambridge, United Kingdom
| | - Sanjay Sinha
- Wellcome-MRC Cambridge Stem Cell Institute, Jeffrey Cheah Biomedical Centre, Cambridge, United Kingdom
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32
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Wang D, Xu Y, Li Q, Turng LS. Artificial small-diameter blood vessels: materials, fabrication, surface modification, mechanical properties, and bioactive functionalities. J Mater Chem B 2020; 8:1801-1822. [PMID: 32048689 PMCID: PMC7155776 DOI: 10.1039/c9tb01849b] [Citation(s) in RCA: 70] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Cardiovascular diseases, especially ones involving narrowed or blocked blood vessels with diameters smaller than 6 millimeters, are the leading cause of death globally. Vascular grafts have been used in bypass surgery to replace damaged native blood vessels for treating severe cardio- and peripheral vascular diseases. However, autologous replacement grafts are not often available due to prior harvesting or the patient's health. Furthermore, autologous harvesting causes secondary injury to the patient at the harvest site. Therefore, artificial blood vessels have been widely investigated in the last several decades. In this review, the progress and potential outlook of small-diameter blood vessels (SDBVs) engineered in vitro are highlighted and summarized, including material selection and development, fabrication techniques, surface modification, mechanical properties, and bioactive functionalities. Several kinds of natural and synthetic polymers for artificial SDBVs are presented here. Commonly used fabrication techniques, such as extrusion and expansion, electrospinning, thermally induced phase separation (TIPS), braiding, 3D printing, hydrogel tubing, gas foaming, and a combination of these methods, are analyzed and compared. Different surface modification methods, such as physical immobilization, surface adsorption, plasma treatment, and chemical immobilization, are investigated and are compared here as well. Mechanical requirements of SDBVs are also reviewed for long-term service. In vitro biological functions of artificial blood vessels, including oxygen consumption, nitric oxide (NO) production, shear stress response, leukocyte adhesion, and anticoagulation, are also discussed. Finally, we draw conclusions regarding current challenges and attempts to identify future directions for the optimal combination of materials, fabrication methods, surface modifications, and biofunctionalities. We hope that this review can assist with the design, fabrication, and application of SDBVs engineered in vitro and promote future advancements in this emerging research field.
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Affiliation(s)
- Dongfang Wang
- Department of Mechanical Engineering, University of Wisconsin, Madison, WI, USA. and Wisconsin Institute for Discovery, University of Wisconsin, Madison, WI, USA and School of Mechanics and Engineering Science, Zhengzhou University, Zhengzhou 450001, P. R. China and National Center for International Research of Micro-Nano Molding Technology, Zhengzhou University, Zhengzhou 450001, P. R. China
| | - Yiyang Xu
- Department of Mechanical Engineering, University of Wisconsin, Madison, WI, USA. and Wisconsin Institute for Discovery, University of Wisconsin, Madison, WI, USA
| | - Qian Li
- School of Mechanics and Engineering Science, Zhengzhou University, Zhengzhou 450001, P. R. China and National Center for International Research of Micro-Nano Molding Technology, Zhengzhou University, Zhengzhou 450001, P. R. China
| | - Lih-Sheng Turng
- Department of Mechanical Engineering, University of Wisconsin, Madison, WI, USA. and Wisconsin Institute for Discovery, University of Wisconsin, Madison, WI, USA
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33
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Zhang Q, Zhang X, Truskey GA. Vascular Microphysiological Systems to Model Diseases. CELL & GENE THERAPY INSIGHTS 2020; 6:93-102. [PMID: 32431950 PMCID: PMC7236815 DOI: 10.18609/cgti.2020.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Human vascular microphysiological systems (MPS) represent promising three-dimensional in vitro models of normal and diseased vascular tissue. These systems build upon advances in tissue engineering, microfluidics, and stem cell differentiation and replicate key functional units of organs and tissues. Vascular models have been developed for the microvasculature as well as medium-size arterioles. Key functions of the vascular system have been reproduced and stem cells offer the potential to model genetic diseases and population variation in genes that may increase individual risk for cardiovascular disease. Such systems can be used to evaluate new therapeutics options.
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Affiliation(s)
- Qiao Zhang
- Department of Biomedical Engineering, Duke University, 1427 CIEMAS, 101 Science Drive, Durham, NC 27708-0281, USA
| | - Xu Zhang
- Department of Biomedical Engineering, Duke University, 1427 CIEMAS, 101 Science Drive, Durham, NC 27708-0281, USA
| | - George A. Truskey
- Department of Biomedical Engineering, Duke University, 1427 CIEMAS, 101 Science Drive, Durham, NC 27708-0281, USA
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34
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Eilenberg M, Enayati M, Ehebruster D, Grasl C, Walter I, Messner B, Baudis S, Potzmann P, Kaun C, Podesser BK, Wojta J, Bergmeister H. Long Term Evaluation of Nanofibrous, Bioabsorbable Polycarbonate Urethane Grafts for Small Diameter Vessel Replacement in Rodents. Eur J Vasc Endovasc Surg 2019; 59:643-652. [PMID: 31874809 DOI: 10.1016/j.ejvs.2019.11.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Revised: 10/14/2019] [Accepted: 11/04/2019] [Indexed: 12/31/2022]
Abstract
OBJECTIVE Biodegradable materials for in situ vascular tissue engineering could meet the increasing clinical demand for sufficient synthetic small diameter vascular substitutes in aortocoronary bypass and peripheral vascular surgery. The aim of this study was to design a new degradable thermoplastic polycarbonate urethane (dPCU) with improved biocompatibility and optimal biomechanical properties. Electrospun conduits made from dPCU were evaluated in short and long term follow up and compared with expanded polytetrafluoroethylene (ePTFE) controls. METHODS Both conduits were investigated prior to implantation to assess their biocompatibility and inflammatory potential via real time polymerase chain reaction using a macrophage culture. dPCU grafts (n = 28) and ePTFE controls (n = 28) were then implanted into the infrarenal abdominal aorta of Sprague-Dawley rats. After seven days, one, six, and 12 months, grafts were analysed by histology and immunohistochemistry (IHC) and assessed biomechanically. RESULTS Anti-inflammatory signalling was upregulated in dPCU conduits and increased significantly over time in vitro. dPCU and ePTFE grafts offered excellent long and short term patency rates (92.9% in both groups at 12 months) in the rat model without dilatation or aneurysm formation. In comparison to ePTFE, dPCU grafts showed transmural ingrowth of vascular specific cells resulting in a structured neovessel formation around the graft. The graft material was slowly reduced, while the compliance of the neovessel increased over time. CONCLUSION The newly designed dPCU grafts have the potential to be safely applied for in situ vascular tissue engineering applications. The degradable substitutes showed good in vivo performance and revealed desirable characteristics such as biomechanical stability, non-thrombogenicity, and minimal inflammatory response after long term implantation.
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Affiliation(s)
- Magdalena Eilenberg
- Department of Surgery, Medical University of Vienna, Vienna, Austria; Centre for Biomedical Research, Medical University of Vienna, Vienna, Austria; Ludwig Boltzmann Cluster for Cardiovascular Research, Medical University of Vienna, Vienna, Austria
| | - Marjan Enayati
- Centre for Biomedical Research, Medical University of Vienna, Vienna, Austria; Ludwig Boltzmann Cluster for Cardiovascular Research, Medical University of Vienna, Vienna, Austria
| | - Daniel Ehebruster
- Centre for Biomedical Research, Medical University of Vienna, Vienna, Austria
| | - Christian Grasl
- Ludwig Boltzmann Cluster for Cardiovascular Research, Medical University of Vienna, Vienna, Austria; Centre of Medical Physics and Biomedical Engineering, Medical University of Vienna, Vienna, Austria
| | - Ingrid Walter
- Department of Pathobiology, Veterinary University, Vienna, Austria
| | - Barbara Messner
- Surgical Research Laboratories-Cardiac Surgery, Department of Surgery, Medical University of Vienna, Vienna, Austria
| | - Stefan Baudis
- Institute of Applied Synthetic Chemistry, Vienna University of Technology, Vienna, Austria; Austrian Cluster for Tissue Regeneration, Vienna, Austria
| | - Paul Potzmann
- Institute of Applied Synthetic Chemistry, Vienna University of Technology, Vienna, Austria; Austrian Cluster for Tissue Regeneration, Vienna, Austria
| | - Christoph Kaun
- Ludwig Boltzmann Cluster for Cardiovascular Research, Medical University of Vienna, Vienna, Austria; Department of Internal Medicine II, Medical University of Vienna, Vienna, Austria
| | - Bruno K Podesser
- Centre for Biomedical Research, Medical University of Vienna, Vienna, Austria; Ludwig Boltzmann Cluster for Cardiovascular Research, Medical University of Vienna, Vienna, Austria; Austrian Cluster for Tissue Regeneration, Vienna, Austria
| | - Johann Wojta
- Ludwig Boltzmann Cluster for Cardiovascular Research, Medical University of Vienna, Vienna, Austria; Department of Internal Medicine II, Medical University of Vienna, Vienna, Austria
| | - Helga Bergmeister
- Centre for Biomedical Research, Medical University of Vienna, Vienna, Austria; Ludwig Boltzmann Cluster for Cardiovascular Research, Medical University of Vienna, Vienna, Austria.
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35
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Physico-mechanical and in vitro characterization of electrically conductive electrospun nanofibers of poly urethane/single walled carbon nano tube by great endothelial cells adhesion for vascular tissue engineering. JOURNAL OF POLYMER RESEARCH 2019. [DOI: 10.1007/s10965-019-1916-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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36
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Ilanlou S, Khakbiz M, Amoabediny G, Mohammadi J. Preclinical studies of acellular extracellular matrices as small-caliber vascular grafts. Tissue Cell 2019; 60:25-32. [DOI: 10.1016/j.tice.2019.07.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2019] [Revised: 07/28/2019] [Accepted: 07/30/2019] [Indexed: 01/09/2023]
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Zhang F, Xie Y, Celik H, Akkus O, Bernacki SH, King MW. Engineering small-caliber vascular grafts from collagen filaments and nanofibers with comparable mechanical properties to native vessels. Biofabrication 2019; 11:035020. [PMID: 30943452 DOI: 10.1088/1758-5090/ab15ce] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
At the present time, there is no successful synthetic, off-the-shelf small-caliber vascular graft (<6 mm) for the repair or bypass of the coronary or carotid arteries. This stimulates on-going investigations to fabricate an artificial vascular graft that has both sufficient mechanical properties as well as superior biological performance. Collagen has long been considered as a viable material to encourage cell recruitment, tissue regeneration, and revascularization, but its use has been limited by its inferior mechanical properties. In this study, novel electrochemically aligned collagen filaments were used to engineer a bilayer small-caliber vascular graft, by circular knitting the collagen filaments and electrospinning collagen nanofibers. The collagen prototype grafts showed significantly greater bursting strength under dry and hydrated conditions to that of autografts such as the human internal mammary artery and the saphenous vein (SV). The suture retention strength was sufficient under dry condition, but that under hydrated condition needs to be further improved. The radial dynamic compliance of the collagen grafts was similar to that of the human SV. During in vitro cell culture assays with human umbilical vein endothelial cells, the prototype collagen grafts also encouraged cell adhesion and promoted cell proliferation compared to the synthetic poly(lactic acid) grafts. In conclusion, this study demonstrated the feasibility of the use of novel collagen filaments for fabricating small caliber tissue-engineered vascular grafts that provide both sufficient mechanical properties and superior biological performance.
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Affiliation(s)
- Fan Zhang
- Wilson College of Textiles, North Carolina State University, Raleigh, United States of America
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38
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Goins A, Webb AR, Allen JB. Multi-layer approaches to scaffold-based small diameter vessel engineering: A review. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 97:896-912. [DOI: 10.1016/j.msec.2018.12.067] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Revised: 12/11/2018] [Accepted: 12/20/2018] [Indexed: 12/28/2022]
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39
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Petrak K, Vissapragada R, Shi S, Siddiqui Z, Kim KK, Sarkar B, Kumar VA. Challenges in Translating from Bench to Bed-Side: Pro-Angiogenic Peptides for Ischemia Treatment. Molecules 2019; 24:E1219. [PMID: 30925755 PMCID: PMC6479440 DOI: 10.3390/molecules24071219] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2019] [Revised: 03/21/2019] [Accepted: 03/25/2019] [Indexed: 02/07/2023] Open
Abstract
We describe progress and obstacles in the development of novel peptide-hydrogel therapeutics for unmet medical needs in ischemia treatment, focusing on the development and translation of therapies specifically in peripheral artery disease (PAD). Ischemia is a potentially life-threatening complication in PAD, which affects a significant percentage of the elderly population. While studies on inducing angiogenesis to treat PAD were started two decades ago, early results from animal models as well as clinical trials have not yet been translated into clinical practice. We examine some of the challenges encountered during such translation. We further note the need for sustained angiogenic effect involving whole growth factor, gene therapy and synthetic growth factor strategies. Finally, we discuss the need for tissue depots for de novo formation of microvasculature. These scaffolds can act as templates for neovasculature development to improve circulation and healing at the preferred anatomical location.
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Affiliation(s)
| | - Ravi Vissapragada
- Department of Gastrointestinal Surgery, Flinders Medical Centre, 5042 Bedford Park, South Australia, Australia.
| | - Siyu Shi
- Department of Medicine Stanford School of Medicine, Stanford, CA 94305, USA.
| | - Zain Siddiqui
- Department of Biomedical Engineering, Newark, NJ 07102, USA.
| | - Ka Kyung Kim
- Department of Biomedical Engineering, Newark, NJ 07102, USA.
| | - Biplab Sarkar
- Department of Biomedical Engineering, Newark, NJ 07102, USA.
| | - Vivek A Kumar
- Department of Biomedical Engineering, Newark, NJ 07102, USA.
- Department of Chemical and Materials Engineering, New Jersey Institute of Technology, Newark, NJ 07102, USA.
- Rutgers School of Dental Medicine, Newark, NJ 07103, USA.
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40
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Ben-Shaul S, Landau S, Merdler U, Levenberg S. Mature vessel networks in engineered tissue promote graft-host anastomosis and prevent graft thrombosis. Proc Natl Acad Sci U S A 2019; 116:2955-2960. [PMID: 30718418 PMCID: PMC6386696 DOI: 10.1073/pnas.1814238116] [Citation(s) in RCA: 71] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Graft vascularization remains one of the most critical challenges facing tissue-engineering experts in their attempt to create thick transplantable tissues and organs. In vitro prevascularization of engineered tissues has been suggested to promote rapid anastomosis between the graft and host vasculatures; however, thrombotic events have been reported upon graft implantation. Here, we aimed to determine whether in vitro vessel maturation in transplantable grafts can accelerate vascular integration and graft perfusion and prevent thrombotic events in the grafts. To this end, endothelial cells and fibroblasts were cocultured on 3D scaffolds for 1, 7, or 14 d to form vasculature with different maturation degrees. Monitoring graft-host interactions postimplantation demonstrated that the 14-d in vitro-cultured grafts, bearing more mature and complex vessel networks as indicated by elongated and branched vessel structures, had increased graft-host vessel anastomosis; host vessel penetration into the graft increased approximately eightfold, and graft perfusion increased sixfold. The presence of developed vessel networks prevented clot accumulation in the grafts. Conversely, short-term cultured constructs demonstrated poor vascularization and increased thrombus formation. Elevated expression levels of coagulation factors, von Willebrand factor (vWF), and tissue factor (TF), were demonstrated in constructs bearing less mature vasculature. To conclude, these findings demonstrate the importance of establishing mature and complex vessel networks in engineered tissues before implantation to promote anastomosis with the host and accelerate graft perfusion.
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Affiliation(s)
- Shahar Ben-Shaul
- Department of Biomedical Engineering, Technion-Israel Institute of Technology, 32000 Haifa, Israel
- The Interdepartmental Program for Biotechnology, Technion-Israel Institute of Technology, 32000 Haifa, Israel
| | - Shira Landau
- Department of Biomedical Engineering, Technion-Israel Institute of Technology, 32000 Haifa, Israel
| | - Uri Merdler
- Department of Biomedical Engineering, Technion-Israel Institute of Technology, 32000 Haifa, Israel
| | - Shulamit Levenberg
- Department of Biomedical Engineering, Technion-Israel Institute of Technology, 32000 Haifa, Israel;
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41
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Li X, Zhao H. Mechanical and degradation properties of small-diameter vascular grafts in an in vitro biomimetic environment. J Biomater Appl 2019; 33:1017-1034. [DOI: 10.1177/0885328218820751] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Small-diameter vascular grafts may fail after implantation due to various reasons from mechanical and biological aspects. In order to evaluate the mechanical durability of small-diameter vascular grafts after implantation, an artificial vascular biomimetic environment that can simulate body temperature, the liquid environment outside the vessel, and continuous blood flow and pulsatile pressure was constructed. This device can be used as a “pre-test” prior to animal experiments to explore the changes of mechanical and degradation properties in the long-term in vivo environment. At the same time, braided tube-reinforced silk fibroin/poly (l-lactic acid-co-ε-caprolactone) small-diameter vascular grafts were fabricated and tested under the biomimetic environment. Mechanical changes, including tensile properties, suture retention strength, compliance, and degradation behavior of the braided tube-reinforced poly (l-lactic acid-co-ε-caprolactone)/silk fibroin small-diameter vascular grafts were explored over various periods of time in the biomimetic environment. The results shown that under a period of testing in the in vitro biomimetic environment, the comprehensive mechanical properties (including tensile properties, suture retention strength, estimated-bursting pressure, and compliance) of small-diameter vascular grafts exhibited varying degrees of changes but that there was no obvious degradation behavior in the short term.
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Affiliation(s)
- Xiangshun Li
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou, China
| | - Huijing Zhao
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou, China
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42
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Sarkar B, Nguyen PK, Gao W, Dondapati A, Siddiqui Z, Kumar VA. Angiogenic Self-Assembling Peptide Scaffolds for Functional Tissue Regeneration. Biomacromolecules 2018; 19:3597-3611. [PMID: 30132656 DOI: 10.1021/acs.biomac.8b01137] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Implantation of acellular biomimetic scaffolds with proangiogenic motifs may have exciting clinical utility for the treatment of ischemic pathologies such as myocardial infarction. Although direct delivery of angiogenic proteins is a possible treatment option, smaller synthetic peptide-based nanostructured alternatives are being investigated due to favorable factors, such as sustained efficacy and high-density epitope presentation of functional moieties. These peptides may be implanted in vivo at the site of ischemia, bypassing the first-pass metabolism and enabling long-term retention and sustained efficacy. Mimics of angiogenic proteins show tremendous potential for clinical use. We discuss possible approaches to integrate the functionality of such angiogenic peptide mimics into self-assembled peptide scaffolds for application in functional tissue regeneration.
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Affiliation(s)
| | | | | | | | | | - Vivek A Kumar
- Rutgers School of Dental Medicine , Newark , New Jersey 07101 , United States
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43
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Rim NG, Yih A, Hsi P, Wang Y, Zhang Y, Wong JY. Micropatterned cell sheets as structural building blocks for biomimetic vascular patches. Biomaterials 2018; 181:126-139. [PMID: 30081303 DOI: 10.1016/j.biomaterials.2018.07.047] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 07/21/2018] [Accepted: 07/25/2018] [Indexed: 02/07/2023]
Abstract
To successfully develop a functional tissue-engineered vascular patch, recapitulating the hierarchical structure of vessel is critical to mimic mechanical properties. Here, we use a cell sheet engineering strategy with micropatterning technique to control structural organization of bovine aortic vascular smooth muscle cell (VSMC) sheets. Actin filament staining and image analysis showed clear cellular alignment of VSMC sheets cultured on patterned substrates. Viability of harvested VSMC sheets was confirmed by Live/Dead® cell viability assay after 24 and 48 h of transfer. VSMC sheets stacked to generate bilayer VSMC patches exhibited strong inter-layer bonding as shown by lap shear test. Uniaxial tensile testing of monolayer VSMC sheets and bilayer VSMC patches displayed nonlinear, anisotropic stress-stretch response similar to the biomechanical characteristic of a native arterial wall. Collagen content and structure were characterized to determine the effects of patterning and stacking on extracellular matrix of VSMC sheets. Using finite-element modeling to simulate uniaxial tensile testing of bilayer VSMC patches, we found the stress-stretch response of bilayer patterned VSMC patches under uniaxial tension to be predicted using an anisotropic hyperelastic constitutive model. Thus, our cell sheet harvesting system combined with biomechanical modeling is a promising approach to generate building blocks for tissue-engineered vascular patches with structure and mechanical behavior mimicking native tissue.
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Affiliation(s)
- Nae Gyune Rim
- Department of Biomedical Engineering, Boston University, Boston, MA 02215, USA
| | - Alice Yih
- Department of Biomedical Engineering, Boston University, Boston, MA 02215, USA
| | - Peter Hsi
- Department of Biomedical Engineering, Boston University, Boston, MA 02215, USA
| | - Yunjie Wang
- Department of Mechanical Engineering, and Boston University, Boston, MA 02215, USA
| | - Yanhang Zhang
- Department of Biomedical Engineering, Boston University, Boston, MA 02215, USA; Department of Mechanical Engineering, and Boston University, Boston, MA 02215, USA; Division of Materials Science and Engineering, Boston University, Boston, MA 02215, USA
| | - Joyce Y Wong
- Department of Biomedical Engineering, Boston University, Boston, MA 02215, USA; Division of Materials Science and Engineering, Boston University, Boston, MA 02215, USA.
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In Vivo Performance of Decellularized Vascular Grafts: A Review Article. Int J Mol Sci 2018; 19:ijms19072101. [PMID: 30029536 PMCID: PMC6073319 DOI: 10.3390/ijms19072101] [Citation(s) in RCA: 80] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 07/16/2018] [Accepted: 07/16/2018] [Indexed: 12/12/2022] Open
Abstract
Due to poor vessel quality in patients with cardiovascular diseases, there has been an increased demand for small-diameter tissue-engineered blood vessels that can be used as replacement grafts in bypass surgery. Decellularization techniques to minimize cellular inflammation have been applied in tissue engineering research for the development of small-diameter vascular grafts. The biocompatibility of allogenic or xenogenic decellularized matrices has been evaluated in vitro and in vivo. Both short-term and long-term preclinical studies are crucial for evaluation of the in vivo performance of decellularized vascular grafts. This review offers insight into the various preclinical studies that have been performed using decellularized vascular grafts. Different strategies, such as surface-modified, recellularized, or hybrid vascular grafts, used to improve neoendothelialization and vascular wall remodeling, are also highlighted. This review provides information on the current status and the future development of decellularized vascular grafts.
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Ding N, Dou C, Wang Y, Liu F, Guan G, Huo D, Li Y, Yang J, Wei K, Yang M, Tan J, Zeng W, Zhu C. Antishear Stress Bionic Carbon Nanotube Mesh Coating with Intracellular Controlled Drug Delivery Constructing Small-Diameter Tissue-Engineered Vascular Grafts. Adv Healthc Mater 2018; 7:e1800026. [PMID: 29637716 DOI: 10.1002/adhm.201800026] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Revised: 03/07/2018] [Indexed: 12/24/2022]
Abstract
Small-diameter (<6 mm) tissue-engineered blood vessels (TEBVs) have a low patency rate due to chronic inflammation mediated intimal hyperplasia. Functional coating with drug release is a promising solution, but preventing the released drug from being rushed away by blood flow remains a great challenge. A single-walled carboxylic acid functionalized carbon nanotube (C-SWCNT) is used to build an irregular mesh for TEBV coating. However, an interaction between the released drug and the cells is still insufficient due to the blood flow. Thus, an intracellular drug delivery system mediated by macrophage cellular uptake is designed. Resveratrol (RSV) modified CNT is used for macrophage uptake. M1 macrophage uptakes CNT-RSV and then converts to the M2 phenotype upon intracellular RSV release. Prohealing M2 macrophage inhibits the chronic inflammation thus maintains the contractile phenotype of the vascular smooth muscle cell (VSMC), which reduces intimal hyperplasia. Additionally, RSV released from the mesh coating also directly protects the contractile VSMCs from being converted to a secretory phenotype. Through antishear stress coating and macrophage-based intracellular drug delivery, CNT-RSV TEBVs exhibit a long-term anti-intimal hyperplasia function. Animal transplantation studies show that the patency rate remains high until day 90 after grafting in rat carotid arteries.
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Affiliation(s)
- Ning Ding
- Department of Anatomy; Third Military Medical University; Gaotanyan Street No. 30 Chongqing 400038 China
| | - Ce Dou
- Department of Orthopedics; Southwest Hospital; Third Military Medical University; Chongqing 400038 China
| | - Yuxin Wang
- Department of Anatomy; Third Military Medical University; Gaotanyan Street No. 30 Chongqing 400038 China
| | - Feila Liu
- Department of Anatomy; Third Military Medical University; Gaotanyan Street No. 30 Chongqing 400038 China
| | - Ge Guan
- Department of Anatomy; Third Military Medical University; Gaotanyan Street No. 30 Chongqing 400038 China
| | - Da Huo
- Department of Anatomy; Third Military Medical University; Gaotanyan Street No. 30 Chongqing 400038 China
| | - Yanzhao Li
- Department of Anatomy; Third Military Medical University; Gaotanyan Street No. 30 Chongqing 400038 China
| | - Jingyuan Yang
- Department of Anatomy; Third Military Medical University; Gaotanyan Street No. 30 Chongqing 400038 China
| | - Keyu Wei
- Department of Anatomy; Third Military Medical University; Gaotanyan Street No. 30 Chongqing 400038 China
| | - Mingcan Yang
- Department of Anatomy; Third Military Medical University; Gaotanyan Street No. 30 Chongqing 400038 China
| | - Ju Tan
- Department of Anatomy; Third Military Medical University; Gaotanyan Street No. 30 Chongqing 400038 China
| | - Wen Zeng
- Department of Anatomy; Third Military Medical University; Gaotanyan Street No. 30 Chongqing 400038 China
| | - Chuhong Zhu
- Department of Anatomy; Third Military Medical University; Gaotanyan Street No. 30 Chongqing 400038 China
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Abstract
The therapeutic replacement of diseased tubular tissue is hindered by the availability and suitability of current donor, autologous and synthetically derived protheses. Artificially created, tissue engineered, constructs have the potential to alleviate these concerns with reduced autoimmune response, high anatomical accuracy, long-term patency and growth potential. The advent of 3D bioprinting technology has further supplemented the technological toolbox, opening up new biofabrication research opportunities and expanding the therapeutic potential of the field. In this review, we highlight the challenges facing those seeking to create artificial tubular tissue with its associated complex macro- and microscopic architecture. Current biofabrication approaches, including 3D printing techniques, are reviewed and future directions suggested.
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Dhulekar J, Simionescu A. Challenges in vascular tissue engineering for diabetic patients. Acta Biomater 2018; 70:25-34. [PMID: 29396167 PMCID: PMC5871600 DOI: 10.1016/j.actbio.2018.01.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Revised: 01/06/2018] [Accepted: 01/09/2018] [Indexed: 12/16/2022]
Abstract
Hyperglycemia and dyslipidemia coexist in diabetes and result in inflammation, degeneration, and impaired tissue remodeling, processes which are not conducive to the desired integration of tissue engineered products into the surrounding tissues. There are several challenges for vascular tissue engineering such as non-thrombogenicity, adequate burst pressure and compliance, suturability, appropriate remodeling responses, and vasoactivity, but, under diabetic conditions, an additional challenge needs to be considered: the aggressive oxidative environment generated by the high glucose and lipid concentrations that lead to the formation of advanced glycation end products (AGEs) in the vascular wall. Extracellular matrix-based scaffolds have adequate physical properties and are biocompatible, however, these scaffolds are altered in diabetes by the formation AGEs and impaired collagen degradation, consequently increasing vascular wall stiffness. In addition, vascular cells detect and respond to altered stimuli from the matrix by pathological remodeling of the vascular wall. Due to the immunomodulatory effects of mesenchymal stem cells (MSCs), they are frequently used in tissue engineering in order to protect the scaffolds from inflammation. MSCs together with antioxidant treatments of the scaffolds are expected to protect the vascular grafts from diabetes-induced alterations. In conclusion, as one of the most daunting environments that could damage the ECM and its interaction with cells is progressively built in diabetes, we recommend that cells and scaffolds used in vascular tissue engineering for diabetic patients are tested in diabetic animal models, in order to obtain valuable results regarding their resistance to diabetic adversities. STATEMENT OF SIGNIFICANCE Almost 25 million Americans have diabetes, characterized by high levels of blood sugar that binds to tissues and disturbs the function of cardiovascular structures. Therefore, patients with diabetes have a high risk of cardiovascular diseases. Surgery is required to replace diseased arteries with implants, but these fail after 5-10 years because they are made of non-living materials, not resistant to diabetes. New tissue engineering materials are developed, based on the patients' own stem cells, isolated from fat, and added to extracellular matrix-based scaffolds. Our main concern is that diabetes could damage the tissue-like implants. Thus we review studies related to the effect of diabetes on tissue components and recommend antioxidant treatments to increase the resistance of implants to diabetes.
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48
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Klein D. iPSCs-based generation of vascular cells: reprogramming approaches and applications. Cell Mol Life Sci 2018; 75:1411-1433. [PMID: 29243171 PMCID: PMC5852192 DOI: 10.1007/s00018-017-2730-7] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 12/08/2017] [Accepted: 12/11/2017] [Indexed: 12/15/2022]
Abstract
Recent advances in the field of induced pluripotent stem cells (iPSCs) research have opened a new avenue for stem cell-based generation of vascular cells. Based on their growth and differentiation potential, human iPSCs constitute a well-characterized, generally unlimited cell source for the mass generation of lineage- and patient-specific vascular cells without any ethical concerns. Human iPSCs-derived vascular cells are perfectly suited for vascular disease modeling studies because patient-derived iPSCs possess the disease-causing mutation, which might be decisive for full expression of the disease phenotype. The application of vascular cells for autologous cell replacement therapy or vascular engineering derived from immune-compatible iPSCs possesses huge clinical potential, but the large-scale production of vascular-specific lineages for regenerative cell therapies depends on well-defined, highly reproducible culture and differentiation conditions. This review will focus on the different strategies to derive vascular cells from human iPSCs and their applications in regenerative therapy, disease modeling and drug discovery approaches.
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Affiliation(s)
- Diana Klein
- Institute for Cell Biology (Cancer Research), University Hospital Essen, University of Duisburg-Essen, Virchowstr. 173, 45122, Essen, Germany.
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Radakovic D, Reboredo J, Helm M, Weigel T, Schürlein S, Kupczyk E, Leyh RG, Walles H, Hansmann J. A multilayered electrospun graft as vascular access for hemodialysis. PLoS One 2017; 12:e0185916. [PMID: 29023551 PMCID: PMC5638257 DOI: 10.1371/journal.pone.0185916] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Accepted: 09/21/2017] [Indexed: 01/08/2023] Open
Abstract
Despite medical achievements, the number of patients with end-stage kidney disease keeps steadily raising, thereby entailing a high number of surgical and interventional procedures to establish and maintain arteriovenous vascular access for hemodialysis. Due to vascular disease, aneurysms or infection, the preferred access-an autogenous arteriovenous fistula-is not always available and appropriate. Moreover, when replacing small diameter blood vessels, synthetic vascular grafts possess well-known disadvantages. A continuous multilayered gradient electrospinning was used to produce vascular grafts made of collagen type I nanofibers on luminal and adventitial graft side, and poly-ɛ-caprolactone as medial layer. Therefore, a custom-made electrospinner with robust environmental control was developed. The morphology of electrospun grafts was characterized by scanning electron microscopy and measurement of mechanical properties. Human microvascular endothelial cells were cultured in the graft under static culture conditions and compared to cultures obtained from dynamic continuous flow bioreactors. Immunofluorescent analysis showed that endothelial cells form a continuous luminal layer and functional characteristics were confirmed by uptake of acetylated low-density-lipoprotein. Incorporation of vancomycin and gentamicin to the medial graft layer allowed antimicrobial inhibition without exhibiting an adverse impact on cell viability. Most striking a physiological hemocompatibility was achieved for the multilayered grafts.
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Affiliation(s)
- D. Radakovic
- Department of Thoracic and Cardiovascular Surgery, University Hospital Wuerzburg, Josef-Schneider-Straße 2, Wuerzburg, Germany
| | - J. Reboredo
- Department of Tissue Engineering and Regenerative Medicine, University Hospital Wuerzburg, Roentgenring 11, Wuerzburg, Germany
| | - M. Helm
- Department of Tissue Engineering and Regenerative Medicine, University Hospital Wuerzburg, Roentgenring 11, Wuerzburg, Germany
- Fraunhofer Institute for Silicate Research, Neunerplatz 2, Wuerzburg, Germany
| | - T. Weigel
- Department of Tissue Engineering and Regenerative Medicine, University Hospital Wuerzburg, Roentgenring 11, Wuerzburg, Germany
| | - S. Schürlein
- Department of Tissue Engineering and Regenerative Medicine, University Hospital Wuerzburg, Roentgenring 11, Wuerzburg, Germany
| | - E. Kupczyk
- Department of Tissue Engineering and Regenerative Medicine, University Hospital Wuerzburg, Roentgenring 11, Wuerzburg, Germany
| | - R. G. Leyh
- Department of Thoracic and Cardiovascular Surgery, University Hospital Wuerzburg, Josef-Schneider-Straße 2, Wuerzburg, Germany
| | - H. Walles
- Department of Tissue Engineering and Regenerative Medicine, University Hospital Wuerzburg, Roentgenring 11, Wuerzburg, Germany
- Fraunhofer Institute for Silicate Research, Neunerplatz 2, Wuerzburg, Germany
| | - J. Hansmann
- Department of Tissue Engineering and Regenerative Medicine, University Hospital Wuerzburg, Roentgenring 11, Wuerzburg, Germany
- Fraunhofer Institute for Silicate Research, Neunerplatz 2, Wuerzburg, Germany
- * E-mail:
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50
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Guler S, Aydin HM, Lü LX, Yang Y. Improvement of Decellularization Efficiency of Porcine Aorta Using Dimethyl Sulfoxide as a Penetration Enhancer. Artif Organs 2017; 42:219-230. [DOI: 10.1111/aor.12978] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Revised: 05/11/2017] [Accepted: 05/12/2017] [Indexed: 12/21/2022]
Affiliation(s)
- Selcan Guler
- Institute of Science, Bioengineering Division; Hacettepe University; Ankara Turkey
| | - Halil M. Aydin
- Environmental Engineering and Bioengineering Division and Centre for Bioengineering; Hacettepe University; Ankara Turkey
| | - Lan-Xin Lü
- Institute of Science and Technology in Medicine, School of Medicine, Keele University; Stoke-on-Trent UK
| | - Ying Yang
- Institute of Science and Technology in Medicine, School of Medicine, Keele University; Stoke-on-Trent UK
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