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Zhao L, Shi Z, Qi X, Wang J, Yu M, Dong M, Wang F, Zhou Q, Wang T, Shi W. Corneal stromal structure replicating humanized hydrogel patch for sutureless repair of deep anterior-corneal defect. Biomaterials 2025; 313:122754. [PMID: 39197237 DOI: 10.1016/j.biomaterials.2024.122754] [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: 05/14/2024] [Revised: 08/04/2024] [Accepted: 08/11/2024] [Indexed: 09/01/2024]
Abstract
A critical shortage of donor corneas exists worldwide. Hydrogel patches with a biological architecture and functions that simulate those of native corneas have garnered considerable attention. This study introduces a stromal structure replicating corneal patch (SRCP) composed of a decellularized cornea-templated nanotubular skeleton, recombinant human collagen, and methacrylated gelatin, exhibiting a similar ultrastructure and transmittance (above 80 %) to natural cornea. The SRCP is superior to the conventional recombinant human collagen patch in terms of biomechanical properties and resistance to enzymatic degradation. Additionally, SRCP promotes corneal epithelial and stromal cell migration while preventing the trans-differentiation of stromal cells into myofibroblasts. When applied to an ocular surface (37 °C), SRCP releases methacrylated gelatin, which robustly binds SRCP to the corneal stroma after activation by 405 nm light. Compared to gelatin-based photocurable hydrogel, the SRCP better supports the restoration of normal corneal curvature and withstands deformation under an elevated intraocular pressure (100 mmHg). In an in vivo deep anterior-corneal defect model, SRCP facilitated epithelial healing and vision recovery within 2 weeks, maintained graft structural stability, and inhibited stromal scarring at 4 weeks post-operation. The ideal performance of the SRCP makes it a promising humanized corneal equivalent for sutureless clinical applications.
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Affiliation(s)
- Long Zhao
- Eye Institute of Shandong First Medical University, State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Qingdao, 266071, China
| | - Zhen Shi
- Eye Institute of Shandong First Medical University, State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Qingdao, 266071, China
| | - Xia Qi
- Eye Institute of Shandong First Medical University, State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Qingdao, 266071, China
| | - Jingting Wang
- Eye Institute of Shandong First Medical University, State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Qingdao, 266071, China
| | - Mengmeng Yu
- Eye Institute of Shandong First Medical University, Eye Hospital of Shandong First Medical University (Shandong Eye Hospital), Jinan, 250021, China
| | - Muchen Dong
- Eye Institute of Shandong First Medical University, Eye Hospital of Shandong First Medical University (Shandong Eye Hospital), Jinan, 250021, China
| | - Fuyan Wang
- Eye Institute of Shandong First Medical University, Qingdao Eye Hospital of Shandong First Medical University, Qingdao, 266071, China
| | - Qingjun Zhou
- Eye Institute of Shandong First Medical University, State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Qingdao, 266071, China
| | - Ting Wang
- Eye Institute of Shandong First Medical University, Eye Hospital of Shandong First Medical University (Shandong Eye Hospital), Jinan, 250021, China.
| | - Weiyun Shi
- Eye Institute of Shandong First Medical University, State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Qingdao, 266071, China; Eye Institute of Shandong First Medical University, Eye Hospital of Shandong First Medical University (Shandong Eye Hospital), Jinan, 250021, China.
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2
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Sesa M, Holthusen H, Lamm L, Böhm C, Brepols T, Jockenhövel S, Reese S. Mechanical modeling of the maturation process for tissue-engineered implants: Application to biohybrid heart valves. Comput Biol Med 2023; 167:107623. [PMID: 37922603 DOI: 10.1016/j.compbiomed.2023.107623] [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: 07/09/2023] [Revised: 09/18/2023] [Accepted: 10/23/2023] [Indexed: 11/07/2023]
Abstract
The development of tissue-engineered cardiovascular implants can improve the lives of large segments of our society who suffer from cardiovascular diseases. Regenerative tissues are fabricated using a process called tissue maturation. Furthermore, it is highly challenging to produce cardiovascular regenerative implants with sufficient mechanical strength to withstand the loading conditions within the human body. Therefore, biohybrid implants for which the regenerative tissue is reinforced by standard reinforcement material (e.g. textile or 3d printed scaffold) can be an interesting solution. In silico models can significantly contribute to characterizing, designing, and optimizing biohybrid implants. The first step towards this goal is to develop a computational model for the maturation process of tissue-engineered implants. This paper focuses on the mechanical modeling of textile-reinforced tissue-engineered cardiovascular implants. First, an energy-based approach is proposed to compute the collagen evolution during the maturation process. Then, the concept of structural tensors is applied to model the anisotropic behavior of the extracellular matrix and the textile scaffold. Next, the newly developed material model is embedded into a special solid-shell finite element formulation with reduced integration. Finally, our framework is used to compute two structural problems: a pressurized shell construct and a tubular-shaped heart valve. The results show the ability of the model to predict collagen growth in response to the boundary conditions applied during the maturation process. Consequently, the model can predict the implant's mechanical response, such as the deformation and stresses of the implant.
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Affiliation(s)
- Mahmoud Sesa
- Institute of Applied Mechanics, RWTH Aachen University, Mies-van-der-Rohe-Str. 1, 52074 Aachen, Germany.
| | - Hagen Holthusen
- Institute of Applied Mechanics, RWTH Aachen University, Mies-van-der-Rohe-Str. 1, 52074 Aachen, Germany
| | - Lukas Lamm
- Institute of Applied Mechanics, RWTH Aachen University, Mies-van-der-Rohe-Str. 1, 52074 Aachen, Germany
| | - Christian Böhm
- Biohybrid & Medical Textiles, Institute of Applied Medical Engineering, RWTH Aachen University, Forckenbeckstr. 55, 52074 Aachen, Germany
| | - Tim Brepols
- Institute of Applied Mechanics, RWTH Aachen University, Mies-van-der-Rohe-Str. 1, 52074 Aachen, Germany
| | - Stefan Jockenhövel
- Biohybrid & Medical Textiles, Institute of Applied Medical Engineering, RWTH Aachen University, Forckenbeckstr. 55, 52074 Aachen, Germany
| | - Stefanie Reese
- Institute of Applied Mechanics, RWTH Aachen University, Mies-van-der-Rohe-Str. 1, 52074 Aachen, Germany
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3
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Snyder Y, Jana S. Strategies for Development of Synthetic Heart Valve Tissue Engineering Scaffolds. PROGRESS IN MATERIALS SCIENCE 2023; 139:101173. [PMID: 37981978 PMCID: PMC10655624 DOI: 10.1016/j.pmatsci.2023.101173] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2023]
Abstract
The current clinical solutions, including mechanical and bioprosthetic valves for valvular heart diseases, are plagued by coagulation, calcification, nondurability, and the inability to grow with patients. The tissue engineering approach attempts to resolve these shortcomings by producing heart valve scaffolds that may deliver patients a life-long solution. Heart valve scaffolds serve as a three-dimensional support structure made of biocompatible materials that provide adequate porosity for cell infiltration, and nutrient and waste transport, sponsor cell adhesion, proliferation, and differentiation, and allow for extracellular matrix production that together contributes to the generation of functional neotissue. The foundation of successful heart valve tissue engineering is replicating native heart valve architecture, mechanics, and cellular attributes through appropriate biomaterials and scaffold designs. This article reviews biomaterials, the fabrication of heart valve scaffolds, and their in-vitro and in-vivo evaluations applied for heart valve tissue engineering.
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Affiliation(s)
- Yuriy Snyder
- Department of Bioengineering, University of Missouri, Columbia, MO 65211, USA
| | - Soumen Jana
- Department of Bioengineering, University of Missouri, Columbia, MO 65211, USA
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Boehm CA, Donay C, Lubig A, Ruetten S, Sesa M, Fernández-Colino A, Reese S, Jockenhoevel S. Bio-Inspired Fiber Reinforcement for Aortic Valves: Scaffold Production Process and Characterization. Bioengineering (Basel) 2023; 10:1064. [PMID: 37760166 PMCID: PMC10525898 DOI: 10.3390/bioengineering10091064] [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: 08/14/2023] [Revised: 09/04/2023] [Accepted: 09/07/2023] [Indexed: 09/29/2023] Open
Abstract
The application of tissue-engineered heart valves in the high-pressure circulatory system is still challenging. One possible solution is the development of biohybrid scaffolds with textile reinforcement to achieve improved mechanical properties. In this article, we present a manufacturing process of bio-inspired fiber reinforcement for an aortic valve scaffold. The reinforcement structure consists of polyvinylidene difluoride monofilament fibers that are biomimetically arranged by a novel winding process. The fibers were embedded and fixated into electrospun polycarbonate urethane on a cylindrical collector. The scaffold was characterized by biaxial tensile strength, bending stiffness, burst pressure and hemodynamically in a mock circulation system. The produced fiber-reinforced scaffold showed adequate acute mechanical and hemodynamic properties. The transvalvular pressure gradient was 3.02 ± 0.26 mmHg with an effective orifice area of 2.12 ± 0.22 cm2. The valves sustained aortic conditions, fulfilling the ISO-5840 standards. The fiber-reinforced scaffold failed in a circumferential direction at a stress of 461.64 ± 58.87 N/m and a strain of 49.43 ± 7.53%. These values were above the levels of tested native heart valve tissue. Overall, we demonstrated a novel manufacturing approach to develop a fiber-reinforced biomimetic scaffold for aortic heart valve tissue engineering. The characterization showed that this approach is promising for an in situ valve replacement.
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Affiliation(s)
- Christian A. Boehm
- Department of Biohybrid & Medical Textiles (BioTex), AME Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, Forckenbeckstr. 55, 52074 Aachen, Germany; (C.A.B.); (C.D.); (A.L.); (A.F.-C.)
| | - Christine Donay
- Department of Biohybrid & Medical Textiles (BioTex), AME Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, Forckenbeckstr. 55, 52074 Aachen, Germany; (C.A.B.); (C.D.); (A.L.); (A.F.-C.)
| | - Andreas Lubig
- Department of Biohybrid & Medical Textiles (BioTex), AME Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, Forckenbeckstr. 55, 52074 Aachen, Germany; (C.A.B.); (C.D.); (A.L.); (A.F.-C.)
| | - Stephan Ruetten
- Electron Microscopy Facility, University Hospital Aachen, Pauwelstr. 30, 52074 Aachen, Germany;
| | - Mahmoud Sesa
- Institute of Applied Mechanics, RWTH Aachen University, Mies-van-der-Rohe-Str. 1, 52074 Aachen, Germany; (M.S.); (S.R.)
| | - Alicia Fernández-Colino
- Department of Biohybrid & Medical Textiles (BioTex), AME Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, Forckenbeckstr. 55, 52074 Aachen, Germany; (C.A.B.); (C.D.); (A.L.); (A.F.-C.)
| | - Stefanie Reese
- Institute of Applied Mechanics, RWTH Aachen University, Mies-van-der-Rohe-Str. 1, 52074 Aachen, Germany; (M.S.); (S.R.)
| | - Stefan Jockenhoevel
- Department of Biohybrid & Medical Textiles (BioTex), AME Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, Forckenbeckstr. 55, 52074 Aachen, Germany; (C.A.B.); (C.D.); (A.L.); (A.F.-C.)
- Aachen-Maastricht Institute for Biobased Materials, Maastricht University at Chemelot Campus, Urmonderbaan 22, 6167 Geleen, The Netherlands
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5
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Sun L, Li X, Yang T, Lu T, Du P, Jing C, Chen Z, Lin F, Zhao G, Zhao L. Construction of spider silk protein small-caliber tissue engineering vascular grafts based on dynamic culture and its performance evaluation. J Biomed Mater Res A 2023; 111:71-87. [PMID: 36129207 DOI: 10.1002/jbm.a.37447] [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: 05/22/2022] [Revised: 09/03/2022] [Accepted: 09/07/2022] [Indexed: 11/12/2022]
Abstract
Tissue engineering is an alternative method for preparing small-caliber (<6 mm) vascular grafts. Dynamic mechanical conditioning is being researched as a method to improve mechanical properties of tissue engineered blood vessels. This method attempts to induce unique reaction in implanted cells that regenerate the matrix around them, thereby improving the overall mechanical stability of the grafts. In this study, we used a bioreactor to seed endothelial cells and smooth muscle cells into the inner and outer layers of the electrospun spider silk protein scaffold respectively to construct vascular grafts. The cell proliferation, mechanical properties, blood compatibility and other indicators of the vascular grafts were characterized in vitro. Furthermore, the vascular grafts were implanted in Sprague Dawley rats, and the vascular grafts' patency, extracellular matrix formation, and inflammatory response were evaluated in vivo. We aimed to construct spider silk protein vascular grafts with the potential for in vivo implantation by using a pulsating flow bioreactor. The results showed that, when compared with the static culture condition, the dynamic culture condition improved cell proliferation on vascular scaffolds and enhanced mechanical function of vascular scaffolds. In vivo experiments also showed that the dynamic culture of vascular grafts was more beneficial for the extracellular matrix deposition and anti-thrombogenesis, as well as reducing the inflammatory response of vascular grafts. In conclusion, dynamic mechanical conditioning aid in the resolution of challenges impeding the application of electrospun scaffolds and have the potential to construct small-caliber blood vessels with regenerative function for cardiovascular tissue repair.
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Affiliation(s)
- Lulu Sun
- College of Life Science and Technology, First Affiliated Hospital, Xinxiang Medical University, Xinxiang, China
| | - Xiafei Li
- College of Medical Engineering, Xinxiang Medical University, Xinxiang, China
| | - Tuo Yang
- College of Life Science and Technology, First Affiliated Hospital, Xinxiang Medical University, Xinxiang, China.,Department of Cardiothoracic Surgery, Third Affiliated Hospital, Xinxiang Medical University, Xinxiang, China
| | - Tian Lu
- College of Life Science and Technology, First Affiliated Hospital, Xinxiang Medical University, Xinxiang, China.,Department of Cardiothoracic Surgery, Third Affiliated Hospital, Xinxiang Medical University, Xinxiang, China
| | - Pengchong Du
- College of Life Science and Technology, First Affiliated Hospital, Xinxiang Medical University, Xinxiang, China.,Department of Cardiothoracic Surgery, Third Affiliated Hospital, Xinxiang Medical University, Xinxiang, China
| | - Changqin Jing
- College of Life Science and Technology, First Affiliated Hospital, Xinxiang Medical University, Xinxiang, China
| | - Zhigang Chen
- Henan Engineering Research Center for Mitochondrion Biomedical of Heart, Henan Joint International Research Laboratory of Cardiovascular Injury and Repair, First Affiliated Hospital, Xinxiang Medical University, Xinxiang, China
| | - Fei Lin
- Henan Engineering Research Center for Mitochondrion Biomedical of Heart, Henan Joint International Research Laboratory of Cardiovascular Injury and Repair, First Affiliated Hospital, Xinxiang Medical University, Xinxiang, China
| | - Guoan Zhao
- Henan Engineering Research Center for Mitochondrion Biomedical of Heart, Henan Joint International Research Laboratory of Cardiovascular Injury and Repair, First Affiliated Hospital, Xinxiang Medical University, Xinxiang, China
| | - Liang Zhao
- College of Life Science and Technology, First Affiliated Hospital, Xinxiang Medical University, Xinxiang, China.,Henan Engineering Research Center for Mitochondrion Biomedical of Heart, Henan Joint International Research Laboratory of Cardiovascular Injury and Repair, First Affiliated Hospital, Xinxiang Medical University, Xinxiang, China.,The Central Lab, The Third People Hospital of Datong, Datong, China
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6
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El Maachi I, Kyriakou S, Rütten S, Kopp A, Köpf M, Jockenhoevel S, Fernández-Colino A. Silk Fibroin as Adjuvant in the Fabrication of Mechanically Stable Fibrin Biocomposites. Polymers (Basel) 2022; 14:2251. [PMID: 35683920 PMCID: PMC9183065 DOI: 10.3390/polym14112251] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 05/25/2022] [Accepted: 05/28/2022] [Indexed: 11/17/2022] Open
Abstract
Fibrin is a very attractive material for the development of tissue-engineered scaffolds due to its exceptional bioactivity, versatility in the fabrication, affinity to cell mediators; and the possibility to isolate it from blood plasma, making it autologous. However, fibrin application is greatly limited due to its low mechanical properties, fast degradation, and strong contraction in the presence of cells. In this study, we present a new strategy to overcome these drawbacks by combining it with another natural polymer: silk fibroin. Specifically, we fabricated biocomposites of fibrin (5 mg/mL) and silk fibroin (0.1, 0.5 and 1% w/w) by using a dual injection system, followed by ethanol annealing. The shear elastic modulus increased from 23 ± 5 Pa from fibrin alone, to 67 ± 22 Pa for fibrin/silk fibroin 0.1%, 241 ± 67 Pa for fibrin/silk fibroin 0.5% and 456 ± 32 Pa for fibrin/silk fibroin 1%. After culturing for 27 days with strong contractile cells (primary human arterial smooth muscle cells), fibrin/silk fibroin 0.5% and fibrin/silk fibroin 1% featured minimal cell-mediated contraction (ca. 15 and 5% respectively) in contrast with the large surface loss of the pure fibrin scaffolds (ca. 95%). Additionally, the composites enabled the formation of a proper endothelial cell layer after culturing with human primary endothelial cells under standard culture conditions. Overall, the fibrin/silk fibroin composites, manufactured within this study by a simple and scalable biofabrication approach, offer a promising avenue to boost the applicability of fibrin in tissue engineering.
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Affiliation(s)
- Ikram El Maachi
- Department of Biohybrid & Medical Textiles (BioTex), AME-Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, D-52074 Aachen, Germany; (I.E.M.); (S.K.)
| | - Stavroula Kyriakou
- Department of Biohybrid & Medical Textiles (BioTex), AME-Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, D-52074 Aachen, Germany; (I.E.M.); (S.K.)
| | - Stephan Rütten
- Electron Microscopy Facility, Uniklinik RWTH Aachen, D-52074 Aachen, Germany;
| | - Alexander Kopp
- Fibrothelium GmbH, D-52068 Aachen, Germany; (A.K.); (M.K.)
| | - Marius Köpf
- Fibrothelium GmbH, D-52068 Aachen, Germany; (A.K.); (M.K.)
| | - Stefan Jockenhoevel
- Department of Biohybrid & Medical Textiles (BioTex), AME-Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, D-52074 Aachen, Germany; (I.E.M.); (S.K.)
- AMIBM-Aachen-Maastricht-Institute for Biobased Materials, Faculty of Science and Engineering, Brightlands Chemelot Campus, Maastricht University, 6167 RD Geleen, The Netherlands
| | - Alicia Fernández-Colino
- Department of Biohybrid & Medical Textiles (BioTex), AME-Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, D-52074 Aachen, Germany; (I.E.M.); (S.K.)
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7
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Natural Polymers in Heart Valve Tissue Engineering: Strategies, Advances and Challenges. Biomedicines 2022; 10:biomedicines10051095. [PMID: 35625830 PMCID: PMC9139175 DOI: 10.3390/biomedicines10051095] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 05/03/2022] [Accepted: 05/04/2022] [Indexed: 12/04/2022] Open
Abstract
In the history of biomedicine and biomedical devices, heart valve manufacturing techniques have undergone a spectacular evolution. However, important limitations in the development and use of these devices are known and heart valve tissue engineering has proven to be the solution to the problems faced by mechanical and prosthetic valves. The new generation of heart valves developed by tissue engineering has the ability to repair, reshape and regenerate cardiac tissue. Achieving a sustainable and functional tissue-engineered heart valve (TEHV) requires deep understanding of the complex interactions that occur among valve cells, the extracellular matrix (ECM) and the mechanical environment. Starting from this idea, the review presents a comprehensive overview related not only to the structural components of the heart valve, such as cells sources, potential materials and scaffolds fabrication, but also to the advances in the development of heart valve replacements. The focus of the review is on the recent achievements concerning the utilization of natural polymers (polysaccharides and proteins) in TEHV; thus, their extensive presentation is provided. In addition, the technological progresses in heart valve tissue engineering (HVTE) are shown, with several inherent challenges and limitations. The available strategies to design, validate and remodel heart valves are discussed in depth by a comparative analysis of in vitro, in vivo (pre-clinical models) and in situ (clinical translation) tissue engineering studies.
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Rizzi S, Ragazzini S, Pesce M. Engineering Efforts to Refine Compatibility and Duration of Aortic Valve Replacements: An Overview of Previous Expectations and New Promises. Front Cardiovasc Med 2022; 9:863136. [PMID: 35509271 PMCID: PMC9058060 DOI: 10.3389/fcvm.2022.863136] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Accepted: 03/28/2022] [Indexed: 01/18/2023] Open
Abstract
The absence of pharmacological treatments to reduce or retard the progression of cardiac valve diseases makes replacement with artificial prostheses (mechanical or bio-prosthetic) essential. Given the increasing incidence of cardiac valve pathologies, there is always a more stringent need for valve replacements that offer enhanced performance and durability. Unfortunately, surgical valve replacement with mechanical or biological substitutes still leads to disadvantages over time. In fact, mechanical valves require a lifetime anticoagulation therapy that leads to a rise in thromboembolic complications, while biological valves are still manufactured with non-living tissue, consisting of aldehyde-treated xenograft material (e.g., bovine pericardium) whose integration into the host fails in the mid- to long-term due to unresolved issues regarding immune-compatibility. While various solutions to these shortcomings are currently under scrutiny, the possibility to implant fully biologically compatible valve replacements remains elusive, at least for large-scale deployment. In this regard, the failure in translation of most of the designed tissue engineered heart valves (TEHVs) to a viable clinical solution has played a major role. In this review, we present a comprehensive overview of the TEHVs developed until now, and critically analyze their strengths and limitations emerging from basic research and clinical trials. Starting from these aspects, we will also discuss strategies currently under investigation to produce valve replacements endowed with a true ability to self-repair, remodel and regenerate. We will discuss these new developments not only considering the scientific/technical framework inherent to the design of novel valve prostheses, but also economical and regulatory aspects, which may be crucial for the success of these novel designs.
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Affiliation(s)
- Stefano Rizzi
- Tissue Engineering Unit, Centro Cardiologico Monzino, Istituto di ricovero e cura a carattere scientifico (IRCCS), Milan, Italy
- Department of Chemistry, Materials and Chemical Engineering “Giulio Natta”, Politecnico di Milano, Milan, Italy
- Stefano Rizzi
| | - Sara Ragazzini
- Tissue Engineering Unit, Centro Cardiologico Monzino, Istituto di ricovero e cura a carattere scientifico (IRCCS), Milan, Italy
| | - Maurizio Pesce
- Tissue Engineering Unit, Centro Cardiologico Monzino, Istituto di ricovero e cura a carattere scientifico (IRCCS), Milan, Italy
- *Correspondence: Maurizio Pesce
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9
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Matveeva VG, Senokosova EA, Sevostianova VV, Khanova MY, Glushkova TV, Akentieva TN, Antonova LV, Barbarash LS. Advantages of Fibrin Polymerization Method without the Use of Exogenous Thrombin for Vascular Tissue Engineering Applications. Biomedicines 2022; 10:biomedicines10040789. [PMID: 35453539 PMCID: PMC9026760 DOI: 10.3390/biomedicines10040789] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 03/16/2022] [Accepted: 03/25/2022] [Indexed: 01/01/2023] Open
Abstract
Fibrin is widely used in vascular tissue engineering. Typically, fibrin polymerization is initiated by adding exogenous thrombin. In this study, we proposed a protocol for the preparation of completely autologous fibrin without the use of endogenous thrombin and compared the properties of the prepared fibrin matrix with that obtained by the traditional method. Fibrinogen was obtained by ethanol precipitation followed by fibrin polymerization by adding either exogenous thrombin and calcium chloride (ExThr), or only calcium chloride (EnThr). We examined the structure, mechanical properties, thrombogenicity, degradation rate and cytocompatibility of fibrin matrices. Factor XIII (FXIII) quantitative assay was performed by ELISA, and FXIII activity was assessed by SDS-PAGE detection of γ-γ cross-links. The results show that network structure of EnThr fibrin was characterized by thinner fibers. The EnThr fibrin matrices had higher strength, stiffness and resistance to proteolytic degradation compared to ExThr fibrin. EnThr fibrin matrices exhibited less thrombogenicity in vitro than ExThr, and retained high cytocompatibility. Thus, the proposed approach has several advantages over the traditional method, namely the fabrication of a completely autologous coating material that has better mechanical properties, higher resistance to proteolysis and lower thrombogenicity.
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Shao Z, Tao T, Xu H, Chen C, Lee I, Chung S, Dong Z, Li W, Ma L, Bai H, Chen Q. Recent progress in biomaterials for heart valve replacement: Structure, function, and biomimetic design. VIEW 2021. [DOI: 10.1002/viw.20200142] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Affiliation(s)
- Ziyu Shao
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine & Clinical Research Center for Oral Diseases of Zhejiang Province Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University Hangzhou 310006 China
- State Key Laboratory of Chemical Engineering College of Chemical and Biological Engineering Zhejiang University Hangzhou China
| | - Tingting Tao
- Department of Cardiovascular Surgery The First Affiliated Hospital Zhejiang University School of Medicine Hangzhou Zhejiang Province China
| | - Hongfei Xu
- Department of Cardiovascular Surgery The First Affiliated Hospital Zhejiang University School of Medicine Hangzhou Zhejiang Province China
| | - Cen Chen
- College of Life Sciences and Medicine Zhejiang Sci‐Tech University Hangzhou China
| | - In‐Seop Lee
- College of Life Sciences and Medicine Zhejiang Sci‐Tech University Hangzhou China
- Institute of Natural Sciences Yonsei University Seoul Republic of Korea
| | - Sungmin Chung
- Biomaterials R&D Center GENOSS Co., Ltd. Suwon‐si Republic of Korea
| | - Zhihui Dong
- State Key Laboratory of Chemical Engineering College of Chemical and Biological Engineering Zhejiang University Hangzhou China
| | - Weidong Li
- Department of Cardiovascular Surgery The First Affiliated Hospital Zhejiang University School of Medicine Hangzhou Zhejiang Province China
| | - Liang Ma
- Department of Cardiovascular Surgery The First Affiliated Hospital Zhejiang University School of Medicine Hangzhou Zhejiang Province China
| | - Hao Bai
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine & Clinical Research Center for Oral Diseases of Zhejiang Province Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University Hangzhou 310006 China
- State Key Laboratory of Chemical Engineering College of Chemical and Biological Engineering Zhejiang University Hangzhou China
| | - Qianming Chen
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine & Clinical Research Center for Oral Diseases of Zhejiang Province Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University Hangzhou 310006 China
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11
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Mirani B, Parvin Nejad S, Simmons CA. Recent Progress Toward Clinical Translation of Tissue-Engineered Heart Valves. Can J Cardiol 2021; 37:1064-1077. [PMID: 33839245 DOI: 10.1016/j.cjca.2021.03.022] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 03/04/2021] [Accepted: 03/14/2021] [Indexed: 01/02/2023] Open
Abstract
Surgical replacement remains the primary option to treat the rapidly growing number of patients with severe valvular heart disease. Although current valve replacements-mechanical, bioprosthetic, and cryopreserved homograft valves-enhance survival and quality of life for many patients, the ideal prosthetic heart valve that is abundantly available, immunocompatible, and capable of growth, self-repair, and life-long performance has yet to be developed. These features are essential for pediatric patients with congenital defects, children and young adult patients with rheumatic fever, and active adult patients with valve disease. Heart valve tissue engineering promises to address these needs by providing living valve replacements that function similarly to their native counterparts. This is best evidenced by the long-term clinical success of decellularised pulmonary and aortic homografts, but the supply of homografts cannot meet the demand for replacement valves. A more abundant and consistent source of replacement valves may come from cellularised valves grown in vitro or acellular off-the-shelf biomaterial/tissue constructs that recellularise in situ, but neither tissue engineering approach has yet achieved long-term success in preclinical testing. Beyond the technical challenges, heart valve tissue engineering faces logistical, economic, and regulatory challenges. In this review, we summarise recent progress in heart valve tissue engineering, highlight important outcomes from preclinical and clinical testing, and discuss challenges and future directions toward clinical translation.
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Affiliation(s)
- Bahram Mirani
- Translational Biology and Engineering Program, Ted Rogers Centre for Heart Research, Toronto, Ontario, Canada; Institute of Biomedical Engineering, University of Toronto, Toronto, Ontario, Canada; Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, Ontario, Canada
| | - Shouka Parvin Nejad
- Translational Biology and Engineering Program, Ted Rogers Centre for Heart Research, Toronto, Ontario, Canada; Institute of Biomedical Engineering, University of Toronto, Toronto, Ontario, Canada
| | - Craig A Simmons
- Translational Biology and Engineering Program, Ted Rogers Centre for Heart Research, Toronto, Ontario, Canada; Institute of Biomedical Engineering, University of Toronto, Toronto, Ontario, Canada; Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, Ontario, Canada.
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12
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Uiterwijk M, Smits AIPM, van Geemen D, van Klarenbosch B, Dekker S, Cramer MJ, van Rijswijk JW, Lurier EB, Di Luca A, Brugmans MCP, Mes T, Bosman AW, Aikawa E, Gründeman PF, Bouten CVC, Kluin J. In Situ Remodeling Overrules Bioinspired Scaffold Architecture of Supramolecular Elastomeric Tissue-Engineered Heart Valves. ACTA ACUST UNITED AC 2020; 5:1187-1206. [PMID: 33426376 PMCID: PMC7775962 DOI: 10.1016/j.jacbts.2020.09.011] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 09/22/2020] [Accepted: 09/22/2020] [Indexed: 11/17/2022]
Abstract
In situ tissue engineering that uses resorbable synthetic heart valve scaffolds is an affordable and practical approach for heart valve replacement; therefore, it is attractive for clinical use. This study showed no consistent collagen organization in the predefined direction of electrospun scaffolds made from a resorbable supramolecular elastomer with random or circumferentially aligned fibers, after 12 months of implantation in sheep. These unexpected findings and the observed intervalvular variability highlight the need for a mechanistic understanding of the long-term in situ remodeling processes in large animal models to improve predictability of outcome toward robust and safe clinical application.
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Affiliation(s)
- Marcelle Uiterwijk
- Department of Cardiothoracic Surgery, Amsterdam University Medical Center, Amsterdam, the Netherlands
| | - Anthal I P M Smits
- Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, the Netherlands.,Institute for Complex Molecular Systems, Eindhoven University of Technology, Eindhoven, the Netherlands
| | - Daphne van Geemen
- Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, the Netherlands
| | - Bas van Klarenbosch
- Department of Cardiology, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Sylvia Dekker
- Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, the Netherlands
| | - Maarten Jan Cramer
- Department of Cardiology, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Jan Willem van Rijswijk
- Department of Cardiothoracic Surgery, Amsterdam University Medical Center, Amsterdam, the Netherlands
| | - Emily B Lurier
- Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, the Netherlands.,School of Biomedical Engineering, Science and Health Systems, Drexel University, Philadelphia, Pennsylvania, USA
| | - Andrea Di Luca
- Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, the Netherlands
| | | | | | | | - Elena Aikawa
- Center for Excellence in Vascular Biology, Division of Cardiovascular Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Paul F Gründeman
- Department of Cardiothoracic Surgery, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Carlijn V C Bouten
- Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, the Netherlands.,Institute for Complex Molecular Systems, Eindhoven University of Technology, Eindhoven, the Netherlands
| | - Jolanda Kluin
- Department of Cardiothoracic Surgery, Amsterdam University Medical Center, Amsterdam, the Netherlands.,Institute for Complex Molecular Systems, Eindhoven University of Technology, Eindhoven, the Netherlands
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13
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Jarrell DK, Vanderslice EJ, VeDepo MC, Jacot JG. Engineering Myocardium for Heart Regeneration-Advancements, Considerations, and Future Directions. Front Cardiovasc Med 2020; 7:586261. [PMID: 33195474 PMCID: PMC7588355 DOI: 10.3389/fcvm.2020.586261] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Accepted: 08/31/2020] [Indexed: 12/28/2022] Open
Abstract
Heart disease is the leading cause of death in the United States among both adults and infants. In adults, 5-year survival after a heart attack is <60%, and congenital heart defects are the top killer of liveborn infants. Problematically, the regenerative capacity of the heart is extremely limited, even in newborns. Furthermore, suitable donor hearts for transplant cannot meet the demand and require recipients to use immunosuppressants for life. Tissue engineered myocardium has the potential to replace dead or fibrotic heart tissue in adults and could also be used to permanently repair congenital heart defects in infants. In addition, engineering functional myocardium could facilitate the development of a whole bioartificial heart. Here, we review and compare in vitro and in situ myocardial tissue engineering strategies. In the context of this comparison, we consider three challenges that must be addressed in the engineering of myocardial tissue: recapitulation of myocardial architecture, vascularization of the tissue, and modulation of the immune system. In addition to reviewing and analyzing current progress, we recommend specific strategies for the generation of tissue engineered myocardial patches for heart regeneration and repair.
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Affiliation(s)
- Dillon K Jarrell
- Jacot Laboratory for Pediatric Regenerative Medicine, Department of Bioengineering, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
| | - Ethan J Vanderslice
- Jacot Laboratory for Pediatric Regenerative Medicine, Department of Bioengineering, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
| | - Mitchell C VeDepo
- Jacot Laboratory for Pediatric Regenerative Medicine, Department of Bioengineering, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
| | - Jeffrey G Jacot
- Jacot Laboratory for Pediatric Regenerative Medicine, Department of Bioengineering, University of Colorado Anschutz Medical Campus, Aurora, CO, United States.,Department of Pediatrics, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
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14
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Zhao L, Deng W, Riaz Rajoka MS, Cai D, Xing T, Wu Y. Regulation of the Morphological and Physical Properties of a Soft Tissue Scaffold by Manipulating DD and DS of O-Carboxymethyl Chitin. ACS APPLIED BIO MATERIALS 2020; 3:6187-6195. [PMID: 35021751 DOI: 10.1021/acsabm.0c00730] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
To improve the biocompatibility/biodegradability as well as to lower the cost of the popular glycosaminoglycan/collagen scaffold, a monocomponent's polysaccharide scaffold based on biomimetic chemical modification of chitin from lower organisms was developed creatively. O-Carboxymethyl chitin (O-CMCH) was prepared by chloroacetic acid substitution of alkalized chitin. The cross-linked O-CMCH soft tissue scaffold was constructed by a sol-gel freeze-drying method. The key parameters of the O-CMCH molecular structure, the degree of deacetylation (DD), and the degree of substitution (DS) were used to regulate the morphology and physical properties of the scaffold. The optimized scaffolds were implanted subcutaneously in mice, and the inflammation reaction of surrounding tissues, dermal tissue growth, and scaffold degradation were observed dynamically by light microscopy and scanning electron microscopy. The results showed that the micropores of the scaffold constructed by O-CMCH with DD = 0.53 and DS = 0.61 were uniformly distributed and in communication with each other, and the pore size was 100-150 μm, with high porosity (93.52 ± 4.68%), high swelling ratio (1402 ± 70%), and high skeleton cross-linking degree (93.4 ± 4.6%). Its tensile strength reached 0.183 ± 0.009 MPa, and its elongation at break was 18.7 ± 0.9%. Furthermore, it could be degraded to less than 10% after 16 days in phosphate buffer solution (pH = 7.4) with 0.2 mg/mL lysozymes (≥ 20 000 U/mg). The early inflammation after implanting the optimized scaffolds in mice showed no difference compared with the control. The scaffold material induced dermal tissues to grow over it and was degraded gradually in vivo. The optimized scaffold regulated by DD and DS of O-CMCH possessed suitable morphology and physical properties for soft tissue engineering technology and exhibited a high applicable value.
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Affiliation(s)
- Liqing Zhao
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong 518060, China
| | - Wenjing Deng
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong 518060, China
| | | | - Dejiao Cai
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong 518060, China
| | - Tao Xing
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong 518060, China
| | - Yiguang Wu
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong 518060, China
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15
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Saidy NT, Shabab T, Bas O, Rojas-González DM, Menne M, Henry T, Hutmacher DW, Mela P, De-Juan-Pardo EM. Melt Electrowriting of Complex 3D Anatomically Relevant Scaffolds. Front Bioeng Biotechnol 2020; 8:793. [PMID: 32850700 PMCID: PMC7396698 DOI: 10.3389/fbioe.2020.00793] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Accepted: 06/22/2020] [Indexed: 12/11/2022] Open
Abstract
The manufacture of fibrous scaffolds with tailored micrometric features and anatomically relevant three-dimensional (3D) geometries for soft tissue engineering applications remains a great challenge. Melt electrowriting (MEW) is an advanced additive manufacturing technique capable of depositing predefined micrometric fibers. However, it has been so far inherently limited to simple planar and tubular scaffold geometries because of the need to avoid polymer jet instabilities. In this work, we surmount the technical boundaries of MEW to enable the manufacture of complex fibrous scaffolds with simultaneous controlled micrometric and patient-specific anatomic features. As an example of complex geometry, aortic root scaffolds featuring the sinuses of Valsalva were realized. By modeling the electric field strength associated with the MEW process for these constructs, we found that the combination of a conductive core mandrel with a non-conductive 3D printed model reproducing the complex geometry minimized the variability of the electric field thus enabling the accurate deposition of fibers. We validated these findings experimentally and leveraged the micrometric resolution of MEW to fabricate unprecedented fibrous aortic root scaffolds with anatomically relevant shapes and biomimetic microstructures and mechanical properties. Furthermore, we demonstrated the fabrication of patient-specific aortic root constructs from the 3D reconstruction of computed tomography clinical data.
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Affiliation(s)
- Navid T Saidy
- Centre in Regenerative Medicine, Institute of Health and Biomedical Innovation (IHBI), Queensland University of Technology (QUT), Kelvin Grove, QLD, Australia.,School of Dentistry, The University of Queensland, Herston, QLD, Australia
| | - Tara Shabab
- Centre in Regenerative Medicine, Institute of Health and Biomedical Innovation (IHBI), Queensland University of Technology (QUT), Kelvin Grove, QLD, Australia
| | - Onur Bas
- Centre in Regenerative Medicine, Institute of Health and Biomedical Innovation (IHBI), Queensland University of Technology (QUT), Kelvin Grove, QLD, Australia.,ARC ITTC in Additive Biomanufacturing, Queensland University of Technology, Musk Avenue, Brisbane, QLD, Australia
| | - Diana M Rojas-González
- Medical Materials and Implants, Department of Mechanical Engineering, Technical University of Munich, Garching, Germany
| | - Matthias Menne
- Department of Cardiovascular Engineering, Institute of Applied Medical Engineering, Helmholtz Institute, Medical Faculty, RWTH Aachen University, Aachen, Germany
| | - Tim Henry
- Centre in Regenerative Medicine, Institute of Health and Biomedical Innovation (IHBI), Queensland University of Technology (QUT), Kelvin Grove, QLD, Australia
| | - Dietmar W Hutmacher
- Centre in Regenerative Medicine, Institute of Health and Biomedical Innovation (IHBI), Queensland University of Technology (QUT), Kelvin Grove, QLD, Australia.,ARC ITTC in Additive Biomanufacturing, Queensland University of Technology, Musk Avenue, Brisbane, QLD, Australia.,Institute for Advanced Study, Technical University of Munich, Garching, Germany
| | - Petra Mela
- Medical Materials and Implants, Department of Mechanical Engineering, Technical University of Munich, Garching, Germany.,Department of Biohybrid and Medical Textiles (BioTex), AME-Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, Aachen, Germany
| | - Elena M De-Juan-Pardo
- Centre in Regenerative Medicine, Institute of Health and Biomedical Innovation (IHBI), Queensland University of Technology (QUT), Kelvin Grove, QLD, Australia.,Translational 3d Printing Laboratory for Advanced Tissue Engineering (T3mPLATE), Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands and Centre for Medical Research, The University of Western Australia, Perth, WA, Australia.,Department of Mechanical Engineering, School of Engineering, The University of Western Australia, Perth, WA, Australia
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16
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Gonzalez de Torre I, Alonso M, Rodriguez-Cabello JC. Elastin-Based Materials: Promising Candidates for Cardiac Tissue Regeneration. Front Bioeng Biotechnol 2020; 8:657. [PMID: 32695756 PMCID: PMC7338576 DOI: 10.3389/fbioe.2020.00657] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Accepted: 05/27/2020] [Indexed: 11/15/2022] Open
Abstract
Stroke and cardiovascular episodes are still some of the most common diseases worldwide, causing millions of deaths and costing billions of Euros to healthcare systems. The use of new biomaterials with enhanced biological and physical properties has opened the door to new approaches in cardiovascular applications. Elastin-based materials are biomaterials with some of the most promising properties. Indeed, these biomaterials have started to yield good results in cardiovascular and angiogenesis applications. In this review, we explore the latest trends in elastin-derived materials for cardiac regeneration and the different possibilities that are being explored by researchers to regenerate an infarcted muscle and restore its normal function. Elastin-based materials can be processed in different manners to create injectable systems or hydrogel scaffolds that can be applied by simple injection or as patches to cover the damaged area and regenerate it. Such materials have been applied to directly regenerate the damaged cardiac muscle and to create complex structures, such as heart valves or new bio-stents that could help to restore the normal function of the heart or to minimize damage after a stroke. We will discuss the possibilities that elastin-based materials offer in cardiac tissue engineering, either alone or in combination with other biomaterials, in order to illustrate the wide range of options that are being explored. Moreover, although tremendous advances have been achieved with such elastin-based materials, there is still room for new approaches that could trigger advances in cardiac tissue regeneration.
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17
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Kong B, Chen Y, Liu R, Liu X, Liu C, Shao Z, Xiong L, Liu X, Sun W, Mi S. Fiber reinforced GelMA hydrogel to induce the regeneration of corneal stroma. Nat Commun 2020; 11:1435. [PMID: 32188843 PMCID: PMC7080797 DOI: 10.1038/s41467-020-14887-9] [Citation(s) in RCA: 143] [Impact Index Per Article: 35.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2018] [Accepted: 02/03/2020] [Indexed: 11/16/2022] Open
Abstract
Regeneration of corneal stroma has always been a challenge due to its sophisticated structure and keratocyte-fibroblast transformation. In this study, we fabricate grid poly (ε-caprolactone)-poly (ethylene glycol) microfibrous scaffold and infuse the scaffold with gelatin methacrylate (GelMA) hydrogel to obtain a 3 D fiber hydrogel construct; the fiber spacing is adjusted to fabricate optimal construct that simulates the stromal structure with properties most similar to the native cornea. The topological structure (3 D fiber hydrogel, 3 D GelMA hydrogel, and 2 D culture dish) and chemical factors (serum, ascorbic acid, insulin, and β-FGF) are examined to study their effects on the differentiation of limbal stromal stem cells to keratocytes or fibroblasts and the phenotype maintenance, in vitro and in vivo tissue regeneration. The results demonstrate that fiber hydrogel and serum-free media synergize to provide an optimal environment for the maintenance of keratocyte phenotype and the regeneration of damaged corneal stroma. Regeneration of corneal stroma has been a challenge due to its sophisticated structure and the easy transformation of the keratocyte. Here, the authors use a hydrogel reinforced with orthogonally aligned fibres and serum free medium to maintain keratocyte phenotype for the in vivo stromal regeneration.
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Affiliation(s)
- Bin Kong
- Macromolecular Platforms for Translational Medicine and Bio-Manufacturing Laboratory, Tsinghua-Berkeley Shenzhen Institute, 518055, Shenzhen, P.R. China.,Biomanufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, 518055, Shenzhen, P.R. China
| | - Yun Chen
- Open FIESTA Center, Tsinghua Shenzhen International Graduate School, 518055, Shenzhen, P.R. China
| | - Rui Liu
- Biomanufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, 518055, Shenzhen, P.R. China
| | - Xi Liu
- Beijing Children's Hospital, 100045, Beijing, P.R. China
| | - Changyong Liu
- Additive Manufacturing Research Institute, College of Mechatronics and Control Engineering, Shenzhen University, 518060, Shenzhen, P.R. China
| | - Zengwu Shao
- Tongji Medical College, Huazhong University Science & Technology, 430022, Wuhan, P.R. China
| | - Liming Xiong
- Tongji Medical College, Huazhong University Science & Technology, 430022, Wuhan, P.R. China
| | - Xianning Liu
- Shaanxi Institute of Ophthalmology, 710002, Xi'an, P.R. China.,Shaanxi Key Laboratory of Eye, 710002, Xi'an, P.R. China
| | - Wei Sun
- Macromolecular Platforms for Translational Medicine and Bio-Manufacturing Laboratory, Tsinghua-Berkeley Shenzhen Institute, 518055, Shenzhen, P.R. China. .,Department of Mechanical Engineering, Tsinghua University, 100084, Beijing, P.R. China. .,Department of Mechanical Engineering and Mechanics, Drexel University, 19104, Philadelphia, PA, USA.
| | - Shengli Mi
- Biomanufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, 518055, Shenzhen, P.R. China. .,Open FIESTA Center, Tsinghua Shenzhen International Graduate School, 518055, Shenzhen, P.R. China.
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18
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19
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Oveissi F, Naficy S, Lee A, Winlaw D, Dehghani F. Materials and manufacturing perspectives in engineering heart valves: a review. Mater Today Bio 2020; 5:100038. [PMID: 32211604 PMCID: PMC7083765 DOI: 10.1016/j.mtbio.2019.100038] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Revised: 11/26/2019] [Accepted: 11/27/2019] [Indexed: 12/27/2022] Open
Abstract
Valvular heart diseases (VHD) are a major health burden, affecting millions of people worldwide. The treatments for such diseases rely on medicine, valve repair, and artificial heart valves including mechanical and bioprosthetic valves. Yet, there are countless reports on possible alternatives noting long-term stability and biocompatibility issues and highlighting the need for fabrication of more durable and effective replacements. This review discusses the current and potential materials that can be used for developing such valves along with existing and developing fabrication methods. With this perspective, we quantitatively compare mechanical properties of various materials that are currently used or proposed for heart valves along with their fabrication processes to identify challenges we face in creating new materials and manufacturing techniques to better mimick the performance of native heart valves.
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Key Words
- 3D printing
- Biofabrication
- Biomaterials
- E, Young's modulus
- Electrospinning
- Gal, galactose-α1,3-galactose
- GelMa, gelatin methacrylate
- HA, hyaluronic acid
- HAVIC, human aortic valvular interstitial cells
- MA-HA, methacrylated hyaluronic acid
- NeuGc, N-glycolylneuraminic acid
- P4HB, poly(4-hydroxybutyrate)
- PAAm, polyacrylamide
- PCE, polycitrate-(ε-polypeptide)
- PCL, polycaprolactone
- PE, polyethylene
- PEG, polyethylene glycol
- PEGDA, polyethylene glycol diacrylate
- PGA, poly(glycolic acid)
- PHA, poly(hydroxyalkanoate)
- PLA, polylactide
- PMMA, poly(methyl methacrylate)
- PPG, polypropylene glycol
- PTFE, polytetrafluoroethylene
- PU, polyurethane
- SIBS, poly(styrene-b-isobutylene-b-styrene)
- SMC, smooth muscle cells
- VHD, valvular heart disease
- VIC, aortic valve leaflet interstitial cells
- Valvular heart diseases
- dECM, decellularized extracellular matrix
- ePTFE, expanded PTFE
- xSIBS, crosslinked version of SIBS
- α-SMA, alpha-smooth muscle actin
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Affiliation(s)
- F. Oveissi
- School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, New South Wales, 2006, Australia
| | - S. Naficy
- School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, New South Wales, 2006, Australia
| | - A. Lee
- School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, New South Wales, 2006, Australia
- Discipline of Child and Adolescent Health, Sydney Medical School, Faculty of Health and Medicine, The University of Sydney, New South Wales, 2006, Australia
- Heart Centre for Children, The Children's Hospital at Westmead, New South Wales, 2145, Australia
| | - D.S. Winlaw
- Discipline of Child and Adolescent Health, Sydney Medical School, Faculty of Health and Medicine, The University of Sydney, New South Wales, 2006, Australia
- Heart Centre for Children, The Children's Hospital at Westmead, New South Wales, 2145, Australia
| | - F. Dehghani
- School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, New South Wales, 2006, Australia
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20
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Belleghem SMV, Mahadik B, Snodderly KL, Fisher JP. Overview of Tissue Engineering Concepts and Applications. Biomater Sci 2020. [DOI: 10.1016/b978-0-12-816137-1.00081-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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21
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Kristen M, Ainsworth MJ. Fiber Scaffold Patterning for Mending Hearts: 3D Organization Bringing the Next Step. Adv Healthc Mater 2020; 9:e1900775. [PMID: 31603288 PMCID: PMC7116178 DOI: 10.1002/adhm.201900775] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 09/14/2019] [Indexed: 12/14/2022]
Abstract
Heart failure (HF) is a leading cause of death worldwide. The most common conditions that lead to HF are coronary artery disease, myocardial infarction, valve disorders, high blood pressure, and cardiomyopathy. Due to the limited regenerative capacity of the heart, the only curative therapy currently available is heart transplantation. Therefore, there is a great need for the development of novel regenerative strategies to repair the injured myocardium, replace damaged valves, and treat occluded coronary arteries. Recent advances in manufacturing technologies have resulted in the precise fabrication of 3D fiber scaffolds with high architectural control that can support and guide new tissue growth, opening exciting new avenues for repair of the human heart. This review discusses the recent advancements in the novel research field of fiber patterning manufacturing technologies for cardiac tissue engineering (cTE) and to what extent these technologies could meet the requirements of the highly organized and structured cardiac tissues. Additionally, future directions of these novel fiber patterning technologies, designs, and applicability to advance cTE are presented.
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Affiliation(s)
- Marleen Kristen
- Regenerative Medicine Center, University Medical Center Utrecht,
Utrecht 3584 CT, The Netherlands; Department of Orthopedics, University Medical
Center Utrecht, Utrecht 3584 CX, The Netherlands
| | - Madison J. Ainsworth
- Regenerative Medicine Center, University Medical Center Utrecht,
Utrecht 3584 CT, The Netherlands; Department of Orthopedics, University Medical
Center Utrecht, Utrecht 3584 CX, The Netherlands
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22
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Goetzke R, Keijdener H, Franzen J, Ostrowska A, Nüchtern S, Mela P, Wagner W. Differentiation of Induced Pluripotent Stem Cells towards Mesenchymal Stromal Cells is Hampered by Culture in 3D Hydrogels. Sci Rep 2019; 9:15578. [PMID: 31666572 PMCID: PMC6821810 DOI: 10.1038/s41598-019-51911-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2019] [Accepted: 10/10/2019] [Indexed: 01/08/2023] Open
Abstract
Directed differentiation of induced pluripotent stem cells (iPSCs) towards specific lineages remains a major challenge in regenerative medicine, while there is a growing perception that this process can be influenced by the three-dimensional environment. In this study, we investigated whether iPSCs can differentiate towards mesenchymal stromal cells (MSCs) when embedded into fibrin hydrogels to enable a one-step differentiation procedure within a scaffold. Differentiation of iPSCs on tissue culture plastic or on top of fibrin hydrogels resulted in a typical MSC-like phenotype. In contrast, iPSCs embedded into fibrin gel gave rise to much smaller cells with heterogeneous growth patterns, absence of fibronectin, faint expression of CD73 and CD105, and reduced differentiation potential towards osteogenic and adipogenic lineage. Transcriptomic analysis demonstrated that characteristic genes for MSCs and extracellular matrix were upregulated on flat substrates, whereas genes of neural development were upregulated in 3D culture. Furthermore, the 3D culture had major effects on DNA methylation profiles, particularly within genes for neuronal and cardiovascular development, while there was no evidence for epigenetic maturation towards MSCs. Taken together, iPSCs could be differentiated towards MSCs on tissue culture plastic or on a flat fibrin hydrogel. In contrast, the differentiation process was heterogeneous and not directed towards MSCs when iPSCs were embedded into the hydrogel.
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Affiliation(s)
- Roman Goetzke
- Helmholtz Institute for Biomedical Engineering, Stem Cell Biology and Cellular Engineering, RWTH Aachen University Medical School, Aachen, Germany
| | - Hans Keijdener
- Department of Biohybrid & Medical Textiles (BioTex), AME-Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, Aachen, Germany
| | - Julia Franzen
- Helmholtz Institute for Biomedical Engineering, Stem Cell Biology and Cellular Engineering, RWTH Aachen University Medical School, Aachen, Germany
| | - Alina Ostrowska
- Helmholtz Institute for Biomedical Engineering, Stem Cell Biology and Cellular Engineering, RWTH Aachen University Medical School, Aachen, Germany
| | - Selina Nüchtern
- Helmholtz Institute for Biomedical Engineering, Stem Cell Biology and Cellular Engineering, RWTH Aachen University Medical School, Aachen, Germany
| | - Petra Mela
- Department of Biohybrid & Medical Textiles (BioTex), AME-Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, Aachen, Germany. .,Medical Materials and Implants, Department of Mechanical Engineering and Munich School of BioEngineering, Technical University of Munich, Garching, Germany.
| | - Wolfgang Wagner
- Helmholtz Institute for Biomedical Engineering, Stem Cell Biology and Cellular Engineering, RWTH Aachen University Medical School, Aachen, Germany. .,Institute for Biomedical Engineering - Cell Biology, RWTH Aachen University Medical School, Aachen, Germany.
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Keijdener H, Konrad J, Hoffmann B, Gerardo-Nava J, Rütten S, Merkel R, Vázquez-Jiménez J, Brook GA, Jockenhoevel S, Mela P. A bench-top molding method for the production of cell-laden fibrin micro-fibers with longitudinal topography. J Biomed Mater Res B Appl Biomater 2019; 108:1198-1212. [PMID: 31408584 DOI: 10.1002/jbm.b.34469] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 06/22/2019] [Accepted: 07/29/2019] [Indexed: 11/10/2022]
Abstract
Tissue-engineered constructs have great potential in many intervention strategies. In order for these constructs to function optimally, they should ideally mimic the cellular alignment and orientation found in the tissues to be treated. Here we present a simple and reproducible method for the production of cell-laden pure fibrin micro-fibers with longitudinal topography. The micro-fibers were produced using a molding technique and longitudinal topography was induced by a single initial stretch. Using this method, fibers up to 1 m in length and with diameters of 0.2-3 mm could be produced. The micro-fibers were generated with embedded endothelial cells, smooth muscle cell/fibroblasts or Schwann cells. Polarized light and scanning electron microscopy imaging showed that the initial stretch was sufficient to induce longitudinal topography in the fibrin gel. Cells in the unstretched control micro-fibers elongated randomly in both the floating and encapsulated environments, whereas the cells in the stretched micro-fibers responded to the introduced topography by adopting a similar orientation. Proof of concept bottom-up tissue engineering (TE) constructs are shown, all displaying various anisotropic organization of cells within. This simple, economical, versatile and scalable approach for the production of highly orientated and cell-laden micro-fibers is easily transferrable to any TE laboratory.
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Affiliation(s)
- Hans Keijdener
- Department of Biohybrid & Medical Textiles (BioTex), Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, Aachen, Germany
| | - Jens Konrad
- Institute of Complex Systems 7: Biomechanics, Forschungszentrum Jülich, Jülich, Germany
| | - Bernd Hoffmann
- Institute of Complex Systems 7: Biomechanics, Forschungszentrum Jülich, Jülich, Germany
| | - José Gerardo-Nava
- Institute of Neuropathology, Uniklinik RWTH Aachen University, Aachen, Germany
| | - Stephan Rütten
- Electron Microscopic Facility, Institute of Pathology, RWTH Aachen University Hospital, Aachen, Germany
| | - Rudolf Merkel
- Institute of Complex Systems 7: Biomechanics, Forschungszentrum Jülich, Jülich, Germany
| | | | - Gary A Brook
- Institute of Neuropathology, Uniklinik RWTH Aachen University, Aachen, Germany
| | - Stefan Jockenhoevel
- Department of Biohybrid & Medical Textiles (BioTex), Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, Aachen, Germany
| | - Petra Mela
- Department of Biohybrid & Medical Textiles (BioTex), Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, Aachen, Germany
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D'Amore A, Luketich SK, Hoff R, Ye SH, Wagner WR. Blending Polymer Labile Elements at Differing Scales to Affect Degradation Profiles in Heart Valve Scaffolds. Biomacromolecules 2019; 20:2494-2505. [PMID: 31083976 DOI: 10.1021/acs.biomac.9b00189] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
After more than 22 years of research challenges and innovation, the heart valve tissue engineering paradigm still attracts attention as an approach to overcome limitations which exist with clinically utilized mechanical or bioprosthetic heart valves. Despite encouraging results, delayed translation can be attributed to limited knowledge on the concurrent mechanisms of biomaterial degradation in vivo, host inflammatory response, cell recruitment, and de novo tissue elaboration. This study aimed to reduce this gap by evaluating three alternative levels at which lability could be incorporated into candidate polyurethane materials electroprocessed into a valve scaffold. Specifically, polyester and polycarbonate labile soft segment diols were reacted into thermoplastic elastomeric polyurethane ureas that formed scaffolds where (1) a single polyurethane containing both of the two diols in the polymer backbone was synthesized and processed, (2) two polyurethanes were physically blended, one with exclusively polycarbonate and one with exclusively polyester diols, followed by processing of the blend, and (3) the two polyurethane types were concurrently processed to form individual fiber populations in a valve scaffold. The resulting valve scaffolds were characterized in terms of their mechanics before and after exposure to varying periods of pulsatile flow in an enzymatic (lipase) buffer solution. The results showed that valve scaffolds made from the first type of polymer and processing combination experienced more extensive degradation. This approach, although demonstrated with polyurethane scaffolds, can generally be translated to investigate biomaterial approaches where labile elements are introduced at different structural levels to alter degradation properties while largely preserving the overall chemical composition and initial mechanical behavior.
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Saidy NT, Wolf F, Bas O, Keijdener H, Hutmacher DW, Mela P, De-Juan-Pardo EM. Biologically Inspired Scaffolds for Heart Valve Tissue Engineering via Melt Electrowriting. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1900873. [PMID: 31058444 DOI: 10.1002/smll.201900873] [Citation(s) in RCA: 90] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 04/14/2019] [Indexed: 06/09/2023]
Abstract
Heart valves are characterized to be highly flexible yet tough, and exhibit complex deformation characteristics such as nonlinearity, anisotropy, and viscoelasticity, which are, at best, only partially recapitulated in scaffolds for heart valve tissue engineering (HVTE). These biomechanical features are dictated by the structural properties and microarchitecture of the major tissue constituents, in particular collagen fibers. In this study, the unique capabilities of melt electrowriting (MEW) are exploited to create functional scaffolds with highly controlled fibrous microarchitectures mimicking the wavy nature of the collagen fibers and their load-dependent recruitment. Scaffolds with precisely-defined serpentine architectures reproduce the J-shaped strain stiffening, anisotropic and viscoelastic behavior of native heart valve leaflets, as demonstrated by quasistatic and dynamic mechanical characterization. They also support the growth of human vascular smooth muscle cells seeded both directly or encapsulated in fibrin, and promote the deposition of valvular extracellular matrix components. Finally, proof-of-principle MEW trileaflet valves display excellent acute hydrodynamic performance under aortic physiological conditions in a custom-made flow loop. The convergence of MEW and a biomimetic design approach enables a new paradigm for the manufacturing of scaffolds with highly controlled microarchitectures, biocompatibility, and stringent nonlinear and anisotropic mechanical properties required for HVTE.
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Affiliation(s)
- Navid T Saidy
- Centre in Regenerative Medicine, Institute of Health and Biomedical Innovation (IHBI), Queensland University of Technology (QUT), 60 Musk Avenue, Kelvin Grove, Brisbane, Queensland, 4059, Australia
- Department of Biohybrid & Medical Textiles (BioTex), AME-Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, Forckenbeckstr. 55, 52074, Aachen, Germany
| | - Frederic Wolf
- Department of Biohybrid & Medical Textiles (BioTex), AME-Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, Forckenbeckstr. 55, 52074, Aachen, Germany
| | - Onur Bas
- Centre in Regenerative Medicine, Institute of Health and Biomedical Innovation (IHBI), Queensland University of Technology (QUT), 60 Musk Avenue, Kelvin Grove, Brisbane, Queensland, 4059, Australia
- ARC ITTC in Additive Biomanufacturing, Queensland University of Technology, 60 Musk Avenue, Kelvin Grove, Brisbane, Queensland, 4059, Australia
| | - Hans Keijdener
- Department of Biohybrid & Medical Textiles (BioTex), AME-Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, Forckenbeckstr. 55, 52074, Aachen, Germany
| | - Dietmar W Hutmacher
- Centre in Regenerative Medicine, Institute of Health and Biomedical Innovation (IHBI), Queensland University of Technology (QUT), 60 Musk Avenue, Kelvin Grove, Brisbane, Queensland, 4059, Australia
- ARC ITTC in Additive Biomanufacturing, Queensland University of Technology, 60 Musk Avenue, Kelvin Grove, Brisbane, Queensland, 4059, Australia
- Institute for Advanced Study, Technische Universität München, D-85748, Garching, Germany
| | - Petra Mela
- Department of Biohybrid & Medical Textiles (BioTex), AME-Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, Forckenbeckstr. 55, 52074, Aachen, Germany
- Medical Materials and Medical Implant Design, Department of Mechanical Engineering, Technical University of Munich, Boltzmannstr. 15, 85748, Garching,
| | - Elena M De-Juan-Pardo
- Centre in Regenerative Medicine, Institute of Health and Biomedical Innovation (IHBI), Queensland University of Technology (QUT), 60 Musk Avenue, Kelvin Grove, Brisbane, Queensland, 4059, Australia
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Fernández-Colino A, Iop L, Ventura Ferreira MS, Mela P. Fibrosis in tissue engineering and regenerative medicine: treat or trigger? Adv Drug Deliv Rev 2019; 146:17-36. [PMID: 31295523 DOI: 10.1016/j.addr.2019.07.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2018] [Revised: 05/11/2019] [Accepted: 07/04/2019] [Indexed: 02/07/2023]
Abstract
Fibrosis is a life-threatening pathological condition resulting from a dysfunctional tissue repair process. There is no efficient treatment and organ transplantation is in many cases the only therapeutic option. Here we review tissue engineering and regenerative medicine (TERM) approaches to address fibrosis in the cardiovascular system, the kidney, the lung and the liver. These strategies have great potential to achieve repair or replacement of diseased organs by cell- and material-based therapies. However, paradoxically, they might also trigger fibrosis. Cases of TERM interventions with adverse outcome are also included in this review. Furthermore, we emphasize the fact that, although organ engineering is still in its infancy, the advances in the field are leading to biomedically relevant in vitro models with tremendous potential for disease recapitulation and development of therapies. These human tissue models might have increased predictive power for human drug responses thereby reducing the need for animal testing.
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Mantakaki A, Fakoya AOJ, Sharifpanah F. Recent advances and challenges on application of tissue engineering for treatment of congenital heart disease. PeerJ 2018; 6:e5805. [PMID: 30386701 PMCID: PMC6204240 DOI: 10.7717/peerj.5805] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Accepted: 09/21/2018] [Indexed: 12/11/2022] Open
Abstract
Congenital heart disease (CHD) affects a considerable number of children and adults worldwide. This implicates not only developmental disorders, high mortality, and reduced quality of life but also, high costs for the healthcare systems. CHD refers to a variety of heart and vascular malformations which could be very challenging to reconstruct the malformed region surgically, especially when the patient is an infant or a child. Advanced technology and research have offered a better mechanistic insight on the impact of CHD in the heart and vascular system of infants, children, and adults and identified potential therapeutic solutions. Many artificial materials and devices have been used for cardiovascular surgery. Surgeons and the medical industry created and evolved the ball valves to the carbon-based leaflet valves and introduced bioprosthesis as an alternative. However, with research further progressing, contracting tissue has been developed in laboratories and tissue engineering (TE) could represent a revolutionary answer for CHD surgery. Development of engineered tissue for cardiac and aortic reconstruction for developing bodies of infants and children can be very challenging. Nevertheless, using acellular scaffolds, allograft, xenografts, and autografts is already very common. Seeding of cells on surface and within scaffold is a key challenging factor for use of the above. The use of different types of stem cells has been investigated and proven to be suitable for tissue engineering. They are the most promising source of cells for heart reconstruction in a developing body, even for adults. Some stem cell types are more effective than others, with some disadvantages which may be eliminated in the future.
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Affiliation(s)
| | | | - Fatemeh Sharifpanah
- Department of Physiology, Faculty of Medicine, Justus Liebig University, Giessen, Germany
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Sodhani D, Reese S, Aksenov A, Soğanci S, Jockenhövel S, Mela P, Stapleton SE. Fluid-structure interaction simulation of artificial textile reinforced aortic heart valve: Validation with an in-vitro test. J Biomech 2018; 78:52-69. [PMID: 30086860 DOI: 10.1016/j.jbiomech.2018.07.018] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2017] [Revised: 06/05/2018] [Accepted: 07/09/2018] [Indexed: 01/11/2023]
Abstract
Prosthetic heart valves deployed in the left heart (aortic and mitral) are subjected to harsh hemodynamical conditions. Most of the tissue engineered heart valves have been developed for the low pressure pulmonary position because of the difficulties in fabricating a mechanically strong valve, able to withstand the systemic circulation. This necessitates the use of reinforcing scaffolds, resulting in a tissue-engineered textile reinforced tubular aortic heart valve. Therefore, to better design these implants, material behaviour of the composite, valve kinematics and its hemodynamical response need to be evaluated. Experimental assessment can be immensely time consuming and expensive, paving way for numerical studies. In this work, the material properties obtained using the previously proposed multi-scale numerical method for textile composites was evaluated for its accuracy. An in silico immersed boundary (IB) fluid structure interaction (FSI) simulation emulating the in vitro experiment was set-up to evaluate and compare the geometric orifice area and flow rate for one beat cycle. Results from the in silico FSI simulation were found to be in good coherence with the in vitro test during the systolic phase, while mean deviation of approximately 9% was observed during the diastolic phase of a beat cycle. Merits and demerits of the in silico IB-FSI method for the presented case study has been discussed with the advantages outweighing the drawbacks, indicating the potential towards an effective use of this framework in the development and analysis of heart valves.
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Affiliation(s)
- Deepanshu Sodhani
- Institute of Applied Mechanics, RWTH Aachen University, Mies-van-der-Rohe-Str. 1, 52074 Aachen, Germany.
| | - Stefanie Reese
- Institute of Applied Mechanics, RWTH Aachen University, Mies-van-der-Rohe-Str. 1, 52074 Aachen, Germany
| | - Andrey Aksenov
- Capvidia NV, Research Park Haasrode, Technologielaan 3, B-3001 Leuven, Belgium
| | - Sinan Soğanci
- Capvidia NV, Research Park Haasrode, Technologielaan 3, B-3001 Leuven, Belgium
| | - Stefan Jockenhövel
- Institute of Applied Medical Engineering, Helmholtz Institute & ITA-Institut for Textiltechnik, RWTH Aachen University, Pauwelsstr. 20, 52074 Aachen, Germany
| | - Petra Mela
- Institute of Applied Medical Engineering, Helmholtz Institute & ITA-Institut for Textiltechnik, RWTH Aachen University, Pauwelsstr. 20, 52074 Aachen, Germany
| | - Scott E Stapleton
- Dept. of Mechanical Engineering, University of Massachusetts Lowell, 1 University Avenue, Lowell, MA 01854, USA
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Bas O, Catelas I, De-Juan-Pardo EM, Hutmacher DW. The quest for mechanically and biologically functional soft biomaterials via soft network composites. Adv Drug Deliv Rev 2018; 132:214-234. [PMID: 30048654 DOI: 10.1016/j.addr.2018.07.015] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Revised: 07/18/2018] [Accepted: 07/20/2018] [Indexed: 12/15/2022]
Abstract
Developing multifunctional soft biomaterials capable of addressing all the requirements of the complex tissue regeneration process is a multifaceted problem. In order to tackle the current challenges, recent research efforts are increasingly being directed towards biomimetic design concepts that can be translated into soft biomaterials via advanced manufacturing technologies. Among those, soft network composites consisting of a continuous hydrogel matrix and a reinforcing fibrous network closely resemble native soft biological materials in terms of design and composition as well as physicochemical properties. This article reviews soft network composite systems with a particular emphasis on the design, biomaterial and fabrication aspects within the context of soft tissue engineering and drug delivery applications.
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Affiliation(s)
- Onur Bas
- ARC Industrial Transformation Training Centre in Additive Biomanufacturing, Queensland University of Technology (QUT), Kelvin Grove, Brisbane, QLD 4059, Australia; Centre in Regenerative Medicine, Institute of Health and Biomedical Innovation, Queensland University of Technology (QUT), Brisbane, QLD 4059, Australia; School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty (SEF), Queensland University of Technology (QUT), Brisbane, QLD 4001, Australia
| | - Isabelle Catelas
- School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty (SEF), Queensland University of Technology (QUT), Brisbane, QLD 4001, Australia; Department of Mechanical Engineering, University of Ottawa, Ottawa, ON K1N 6N5, Canada
| | - Elena M De-Juan-Pardo
- ARC Industrial Transformation Training Centre in Additive Biomanufacturing, Queensland University of Technology (QUT), Kelvin Grove, Brisbane, QLD 4059, Australia; School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty (SEF), Queensland University of Technology (QUT), Brisbane, QLD 4001, Australia
| | - Dietmar W Hutmacher
- ARC Industrial Transformation Training Centre in Additive Biomanufacturing, Queensland University of Technology (QUT), Kelvin Grove, Brisbane, QLD 4059, Australia; Centre in Regenerative Medicine, Institute of Health and Biomedical Innovation, Queensland University of Technology (QUT), Brisbane, QLD 4059, Australia; School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty (SEF), Queensland University of Technology (QUT), Brisbane, QLD 4001, Australia; Institute for Advanced Study, Technische Universität München, 85748 Garching, Germany.
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Fakoya AOJ, Otohinoyi DA, Yusuf J. Current Trends in Biomaterial Utilization for Cardiopulmonary System Regeneration. Stem Cells Int 2018; 2018:3123961. [PMID: 29853910 PMCID: PMC5949153 DOI: 10.1155/2018/3123961] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 11/15/2017] [Accepted: 03/01/2018] [Indexed: 12/28/2022] Open
Abstract
The cardiopulmonary system is made up of the heart and the lungs, with the core function of one complementing the other. The unimpeded and optimal cycling of blood between these two systems is pivotal to the overall function of the entire human body. Although the function of the cardiopulmonary system appears uncomplicated, the tissues that make up this system are undoubtedly complex. Hence, damage to this system is undesirable as its capacity to self-regenerate is quite limited. The surge in the incidence and prevalence of cardiopulmonary diseases has reached a critical state for a top-notch response as it currently tops the mortality table. Several therapies currently being utilized can only sustain chronically ailing patients for a short period while they are awaiting a possible transplant, which is also not devoid of complications. Regenerative therapeutic techniques now appear to be a potential approach to solve this conundrum posed by these poorly self-regenerating tissues. Stem cell therapy alone appears not to be sufficient to provide the desired tissue regeneration and hence the drive for biomaterials that can support its transplantation and translation, providing not only physical support to seeded cells but also chemical and physiological cues to the cells to facilitate tissue regeneration. The cardiac and pulmonary systems, although literarily seen as just being functionally and spatially cooperative, as shown by their diverse and dissimilar adult cellular and tissue composition has been proven to share some common embryological codevelopment. However, necessitating their consideration for separate review is the immense adult architectural difference in these systems. This review also looks at details on new biological and synthetic biomaterials, tissue engineering, nanotechnology, and organ decellularization for cardiopulmonary regenerative therapies.
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Affiliation(s)
| | | | - Joshua Yusuf
- All Saints University School of Medicine, Roseau, Dominica
- All Saints University School of Medicine, Kingstown, Saint Vincent and the Grenadines
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Rodríguez-Cabello JC, González de Torre I, Ibañez-Fonseca A, Alonso M. Bioactive scaffolds based on elastin-like materials for wound healing. Adv Drug Deliv Rev 2018; 129:118-133. [PMID: 29551651 DOI: 10.1016/j.addr.2018.03.003] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Revised: 02/06/2018] [Accepted: 03/13/2018] [Indexed: 01/08/2023]
Abstract
Wound healing is a complex process that, in healthy tissues, starts immediately after the injury. Even though it is a natural well-orchestrated process, large trauma wounds, or injuries caused by acids or other chemicals, usually produce a non-elastic deformed tissue that not only have biological reduced properties but a clear aesthetic effect. One of the main drawbacks of the scaffolds used for wound dressing is the lack of elasticity, driving to non-elastic and contracted tissues. In the last decades, elastin based materials have gained in importance as biomaterials for tissue engineering applications due to their good cyto- and bio-compatibility, their ease handling and design, production and modification. Synthetic elastin or elastin like-peptides (ELPs) are the two main families of biomaterials that try to mimic the outstanding properties of natural elastin, elasticity amongst others; although there are no in vivo studies that clearly support that these two families of elastin based materials improve the elasticity of the artificial scaffolds and of the regenerated skin. Within the next pages a review of the different forms (coacervates, fibres, hydrogels and biofunctionalized surfaces) in which these two families of biomaterials can be processed to be applied in the wound healing field have been done. Here, we explore the mechanical and biological properties of these scaffolds as well as the different in vivo approaches in which these scaffolds have been used.
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Affiliation(s)
- J Carlos Rodríguez-Cabello
- BIOFORGE, CIBER-BBN, Edificio Lucia, Universidad de Valladolid, Paseo Belén 19, 47011 Valladolid, Spain; G.I.R. BIOFORGE, Universidad de Valladolid, Paseo de Belén 19, 47011 Valladolid, Spain.
| | - I González de Torre
- BIOFORGE, CIBER-BBN, Edificio Lucia, Universidad de Valladolid, Paseo Belén 19, 47011 Valladolid, Spain; G.I.R. BIOFORGE, Universidad de Valladolid, Paseo Belén 9 A, 47011 Valladolid, Spain.
| | - A Ibañez-Fonseca
- BIOFORGE, CIBER-BBN, Edificio Lucia, Universidad de Valladolid, Paseo Belén 19, 47011 Valladolid, Spain; G.I.R. BIOFORGE, Universidad de Valladolid, Paseo Belén 9 A, 47011 Valladolid, Spain.
| | - M Alonso
- BIOFORGE, CIBER-BBN, Edificio Lucia, Universidad de Valladolid, Paseo Belén 19, 47011 Valladolid, Spain; G.I.R. BIOFORGE, Universidad de Valladolid, Paseo de Belén 19, 47011 Valladolid, Spain.
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Fernández-Colino A, Wolf F, Keijdener H, Rütten S, Schmitz-Rode T, Jockenhoevel S, Rodríguez-Cabello JC, Mela P. Macroporous click-elastin-like hydrogels for tissue engineering applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 88:140-147. [PMID: 29636129 DOI: 10.1016/j.msec.2018.03.013] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Revised: 02/15/2018] [Accepted: 03/15/2018] [Indexed: 01/13/2023]
Abstract
Elastin is a key extracellular matrix (ECM) protein that imparts functional elasticity to tissues and therefore an attractive candidate for bioengineering materials. Genetically engineered elastin-like recombinamers (ELRs) maintain inherent properties of the natural elastin (e.g. elastic behavior, bioactivity, low thrombogenicity, inverse temperature transition) while featuring precisely controlled composition, the possibility for biofunctionalization and non-animal origin. Recently the chemical modification of ELRs to enable their crosslinking via a catalyst-free click chemistry reaction, has further widened their applicability for tissue engineering. Despite these outstanding properties, the generation of macroporous click-ELR scaffolds with controlled, interconnected porosity has remained elusive so far. This significantly limits the potential of these materials as the porosity has a crucial role on cell infiltration, proliferation and ECM formation. In this study we propose a strategy to overcome this issue by adapting the salt leaching/gas foaming technique to click-ELRs. As result, macroporous hydrogels with tuned pore size and mechanical properties in the range of many native tissues were reproducibly obtained as demonstrated by rheological measurements and quantitative analysis of fluorescence, scanning electron and two-photon microscopy images. Additionally, the appropriate size and interconnectivity of the pores enabled smooth muscle cells to migrate into the click-ELR scaffolds and deposit extracellular matrix. The macroporous structure together with the elastic performance and bioactive character of ELRs, the specificity and non-toxic character of the catalyst-free click-chemistry reaction, make these scaffolds promising candidates for applications in tissue regeneration. This work expands the potential use of ELRs and click chemistry systems in general in different biomedical fields.
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Affiliation(s)
- Alicia Fernández-Colino
- Department of Biohybrid & Medical Textiles (BioTex) at AME-Institute of Applied Medical Engineering, Helmholtz Institute-CBMS, RWTH Aachen University, Forckenbeckstr. 55, 52074 Aachen, Germany.
| | - Frederic Wolf
- Department of Biohybrid & Medical Textiles (BioTex) at AME-Institute of Applied Medical Engineering, Helmholtz Institute-CBMS, RWTH Aachen University, Forckenbeckstr. 55, 52074 Aachen, Germany
| | - Hans Keijdener
- Department of Biohybrid & Medical Textiles (BioTex) at AME-Institute of Applied Medical Engineering, Helmholtz Institute-CBMS, RWTH Aachen University, Forckenbeckstr. 55, 52074 Aachen, Germany
| | - Stephan Rütten
- Electron Microscopy Facility, Uniklinik RWTH Aachen, Pauwelsstrasse, 30, D-52074 Aachen, Germany
| | - Thomas Schmitz-Rode
- Department of Biohybrid & Medical Textiles (BioTex) at AME-Institute of Applied Medical Engineering, Helmholtz Institute-CBMS, RWTH Aachen University, Forckenbeckstr. 55, 52074 Aachen, Germany
| | - Stefan Jockenhoevel
- Department of Biohybrid & Medical Textiles (BioTex) at AME-Institute of Applied Medical Engineering, Helmholtz Institute-CBMS, RWTH Aachen University, Forckenbeckstr. 55, 52074 Aachen, Germany; AMIBM-Aachen-Maastricht-Institute for Biobased Materials, Maastricht University, Urmonderbaan 22, 6167 RD, Geleen, The Netherlands
| | | | - Petra Mela
- Department of Biohybrid & Medical Textiles (BioTex) at AME-Institute of Applied Medical Engineering, Helmholtz Institute-CBMS, RWTH Aachen University, Forckenbeckstr. 55, 52074 Aachen, Germany.
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Zhu AS, Grande-Allen KJ. Heart valve tissue engineering for valve replacement and disease modeling. CURRENT OPINION IN BIOMEDICAL ENGINEERING 2018. [DOI: 10.1016/j.cobme.2017.12.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Nachlas ALY, Li S, Davis ME. Developing a Clinically Relevant Tissue Engineered Heart Valve-A Review of Current Approaches. Adv Healthc Mater 2017; 6. [PMID: 29171921 DOI: 10.1002/adhm.201700918] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Revised: 09/25/2017] [Indexed: 11/08/2022]
Abstract
Tissue engineered heart valves (TEHVs) have the potential to address the shortcomings of current implants through the combination of cells and bioactive biomaterials that promote growth and proper mechanical function in physiological conditions. The ideal TEHV should be anti-thrombogenic, biocompatible, durable, and resistant to calcification, and should exhibit a physiological hemodynamic profile. In addition, TEHVs may possess the capability to integrate and grow with somatic growth, eliminating the need for multiple surgeries children must undergo. Thus, this review assesses clinically available heart valve prostheses, outlines the design criteria for developing a heart valve, and evaluates three types of biomaterials (decellularized, natural, and synthetic) for tissue engineering heart valves. While significant progress has been made in biomaterials and fabrication techniques, a viable tissue engineered heart valve has yet to be translated into a clinical product. Thus, current strategies and future perspectives are also discussed to facilitate the development of new approaches and considerations for heart valve tissue engineering.
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Affiliation(s)
- Aline L. Y. Nachlas
- Wallace H Coulter Department of Biomedical Engineering Georgia Institute of Technology and Emory University Atlanta GA 30332 USA
| | - Siyi Li
- Wallace H Coulter Department of Biomedical Engineering Georgia Institute of Technology and Emory University Atlanta GA 30332 USA
| | - Michael E. Davis
- Wallace H Coulter Department of Biomedical Engineering Georgia Institute of Technology and Emory University Atlanta GA 30332 USA
- Children's Heart Research & Outcomes (HeRO) Center Children's Healthcare of Atlanta & Emory University Atlanta GA 30322 USA
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Bas O, D'Angella D, Baldwin JG, Castro NJ, Wunner FM, Saidy NT, Kollmannsberger S, Reali A, Rank E, De-Juan-Pardo EM, Hutmacher DW. An Integrated Design, Material, and Fabrication Platform for Engineering Biomechanically and Biologically Functional Soft Tissues. ACS APPLIED MATERIALS & INTERFACES 2017; 9:29430-29437. [PMID: 28816441 DOI: 10.1021/acsami.7b08617] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We present a design rationale for stretchable soft network composites for engineering tissues that predominantly function under high tensile loads. The convergence of 3D-printed fibers selected from a design library and biodegradable interpenetrating polymer networks (IPNs) result in biomimetic tissue engineered constructs (bTECs) with fully tunable properties that can match specific tissue requirements. We present our technology platform using an exemplary soft network composite model that is characterized to be flexible, yet ∼125 times stronger (E = 3.19 MPa) and ∼100 times tougher (WExt = ∼2000 kJ m-3) than its hydrogel counterpart.
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Affiliation(s)
| | - Davide D'Angella
- Institute for Advanced Study, Technische Universität München , Lichtenbergstraße 2 a, 85748 Garching, Germany
- Chair for Computation in Engineering, Technische Universität München , D-80333 Munich, Germany
| | | | | | | | | | - Stefan Kollmannsberger
- Chair for Computation in Engineering, Technische Universität München , D-80333 Munich, Germany
| | - Alessandro Reali
- Institute for Advanced Study, Technische Universität München , Lichtenbergstraße 2 a, 85748 Garching, Germany
- Department of Civil Engineering and Architecture, University of Pavia , via Ferrata 3, 27100 Pavia, Italy
| | - Ernst Rank
- Institute for Advanced Study, Technische Universität München , Lichtenbergstraße 2 a, 85748 Garching, Germany
- Chair for Computation in Engineering, Technische Universität München , D-80333 Munich, Germany
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Bioinspired coupled helical coils for soft tissue engineering of tubular structures - Improved mechanical behavior of tubular collagen type I templates. Acta Biomater 2017; 59:234-242. [PMID: 28666884 DOI: 10.1016/j.actbio.2017.06.038] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Revised: 06/19/2017] [Accepted: 06/26/2017] [Indexed: 11/23/2022]
Abstract
The design of constructs for tubular tissue engineering is challenging. Most biomaterials need to be reinforced with supporting structures such as knittings, meshes or electrospun material to comply with the mechanical demands of native tissues. In this study, coupled helical coils (CHCs) were manufactured to mimic collagen fiber orientation as found in nature. Monofilaments of different commercially available biodegradable polymers were wound and subsequently fused, resulting in right-handed and left-handed polymer helices fused together in joints where the filaments cross. CHCs of different polymer composition were tested to determine the tensile strength, strain recovery, hysteresis, compressive strength and degradation of CHCs of different composition. Subsequently, seamless and stable hybrid constructs consisting of PDSII® USP 2-0 CHCs embedded in porous collagen type I were produced. Compared to collagen alone, this hybrid showed superior strain recovery (93.5±0.9% vs 71.1±12.6% in longitudinal direction; 87.1±6.6% vs 57.2±4.6% in circumferential direction) and hysteresis (18.9±2.7% vs 51.1±12.0% in longitudinal direction; 11.5±4.6% vs 46.3±6.3% in circumferential direction). Furthermore, this hybrid construct showed an improved Young's modulus in both longitudinal (0.5±0.1MPavs 0.2±0.1MPa; 2.5-fold) and circumferential (1.65±0.07MPavs (2.9±0.3)×10-2MPa; 57-fold) direction, respectively, compared to templates created from collagen alone. Moreover, hybrid template characteristics could be modified by changing the CHC composition and CHCs were produced showing a mechanical behavior similar to the native ureter. CHC-enforced templates, which are easily tunable to meet different demands may be promising for tubular tissue engineering. STATEMENT OF SIGNIFICANCE Most tubular constructs lack sufficient strength and tunability to comply with the mechanical demands of native tissues. Therefore, we embedded coupled helical coils (CHCs) produced from biodegradable polymers - to mimic collagen fiber orientation as found in nature - in collagen type I sponges. We show that the mechanical behavior of CHCs is very similar to native tissue and strengths structurally weak tubular constructs. The production procedure is relatively easy, reproducible and mechanical features can be controlled to meet different mechanical demands. This is promising in template manufacture, hence offering new opportunities in tissue engineering of tubular organs and preventing graft failure.
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Capulli AK, Emmert MY, Pasqualini FS, Kehl D, Caliskan E, Lind JU, Sheehy SP, Park SJ, Ahn S, Weber B, Goss JA, Hoerstrup SP, Parker KK. JetValve: Rapid manufacturing of biohybrid scaffolds for biomimetic heart valve replacement. Biomaterials 2017; 133:229-241. [PMID: 28445803 PMCID: PMC5526340 DOI: 10.1016/j.biomaterials.2017.04.033] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Revised: 04/04/2017] [Accepted: 04/15/2017] [Indexed: 02/06/2023]
Abstract
Tissue engineered scaffolds have emerged as a promising solution for heart valve replacement because of their potential for regeneration. However, traditional heart valve tissue engineering has relied on resource-intensive, cell-based manufacturing, which increases cost and hinders clinical translation. To overcome these limitations, in situ tissue engineering approaches aim to develop scaffold materials and manufacturing processes that elicit endogenous tissue remodeling and repair. Yet despite recent advances in synthetic materials manufacturing, there remains a lack of cell-free, automated approaches for rapidly producing biomimetic heart valve scaffolds. Here, we designed a jet spinning process for the rapid and automated fabrication of fibrous heart valve scaffolds. The composition, multiscale architecture, and mechanical properties of the scaffolds were tailored to mimic that of the native leaflet fibrosa and assembled into three dimensional, semilunar valve structures. We demonstrated controlled modulation of these scaffold parameters and show initial biocompatibility and functionality in vitro. Valves were minimally-invasively deployed via transapical access to the pulmonary valve position in an ovine model and shown to be functional for 15 h.
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Affiliation(s)
- Andrew K Capulli
- Disease Biophysics Group, Wyss Institute for Biologically Inspired Engineering, John A. Paulson School of Engineering and Applied Sciences, Harvard University, 29 Oxford St, Pierce Hall 321, Cambridge, MA, 02138, USA
| | - Maximillian Y Emmert
- Disease Biophysics Group, Wyss Institute for Biologically Inspired Engineering, John A. Paulson School of Engineering and Applied Sciences, Harvard University, 29 Oxford St, Pierce Hall 321, Cambridge, MA, 02138, USA; Institute for Regenerative Medicine (IREM), University of Zurich, Center for Therapy Development/GMP, 13 Moussonstrasse, Zurich, 8044, CH, Switzerland; Clinic for Cardiac Surgery, University Hospital Zurich, 100 Ramistrasse, Zurich, 8091, CH, Switzerland
| | - Francesco S Pasqualini
- Disease Biophysics Group, Wyss Institute for Biologically Inspired Engineering, John A. Paulson School of Engineering and Applied Sciences, Harvard University, 29 Oxford St, Pierce Hall 321, Cambridge, MA, 02138, USA; Institute for Regenerative Medicine (IREM), University of Zurich, Center for Therapy Development/GMP, 13 Moussonstrasse, Zurich, 8044, CH, Switzerland
| | - Debora Kehl
- Institute for Regenerative Medicine (IREM), University of Zurich, Center for Therapy Development/GMP, 13 Moussonstrasse, Zurich, 8044, CH, Switzerland
| | - Etem Caliskan
- Institute for Regenerative Medicine (IREM), University of Zurich, Center for Therapy Development/GMP, 13 Moussonstrasse, Zurich, 8044, CH, Switzerland; Clinic for Cardiac Surgery, University Hospital Zurich, 100 Ramistrasse, Zurich, 8091, CH, Switzerland
| | - Johan U Lind
- Disease Biophysics Group, Wyss Institute for Biologically Inspired Engineering, John A. Paulson School of Engineering and Applied Sciences, Harvard University, 29 Oxford St, Pierce Hall 321, Cambridge, MA, 02138, USA
| | - Sean P Sheehy
- Disease Biophysics Group, Wyss Institute for Biologically Inspired Engineering, John A. Paulson School of Engineering and Applied Sciences, Harvard University, 29 Oxford St, Pierce Hall 321, Cambridge, MA, 02138, USA
| | - Sung Jin Park
- Disease Biophysics Group, Wyss Institute for Biologically Inspired Engineering, John A. Paulson School of Engineering and Applied Sciences, Harvard University, 29 Oxford St, Pierce Hall 321, Cambridge, MA, 02138, USA
| | - Seungkuk Ahn
- Disease Biophysics Group, Wyss Institute for Biologically Inspired Engineering, John A. Paulson School of Engineering and Applied Sciences, Harvard University, 29 Oxford St, Pierce Hall 321, Cambridge, MA, 02138, USA
| | - Benedikt Weber
- Disease Biophysics Group, Wyss Institute for Biologically Inspired Engineering, John A. Paulson School of Engineering and Applied Sciences, Harvard University, 29 Oxford St, Pierce Hall 321, Cambridge, MA, 02138, USA; Institute for Regenerative Medicine (IREM), University of Zurich, Center for Therapy Development/GMP, 13 Moussonstrasse, Zurich, 8044, CH, Switzerland
| | - Josue A Goss
- Disease Biophysics Group, Wyss Institute for Biologically Inspired Engineering, John A. Paulson School of Engineering and Applied Sciences, Harvard University, 29 Oxford St, Pierce Hall 321, Cambridge, MA, 02138, USA
| | - Simon P Hoerstrup
- Disease Biophysics Group, Wyss Institute for Biologically Inspired Engineering, John A. Paulson School of Engineering and Applied Sciences, Harvard University, 29 Oxford St, Pierce Hall 321, Cambridge, MA, 02138, USA; Institute for Regenerative Medicine (IREM), University of Zurich, Center for Therapy Development/GMP, 13 Moussonstrasse, Zurich, 8044, CH, Switzerland
| | - Kevin Kit Parker
- Disease Biophysics Group, Wyss Institute for Biologically Inspired Engineering, John A. Paulson School of Engineering and Applied Sciences, Harvard University, 29 Oxford St, Pierce Hall 321, Cambridge, MA, 02138, USA.
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