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Wu Y, Zou J, Tang K, Xia Y, Wang X, Song L, Wang J, Wang K, Wang Z. From electricity to vitality: the emerging use of piezoelectric materials in tissue regeneration. BURNS & TRAUMA 2024; 12:tkae013. [PMID: 38957661 PMCID: PMC11218788 DOI: 10.1093/burnst/tkae013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Revised: 03/07/2024] [Accepted: 03/13/2024] [Indexed: 07/04/2024]
Abstract
The unique ability of piezoelectric materials to generate electricity spontaneously has attracted widespread interest in the medical field. In addition to the ability to convert mechanical stress into electrical energy, piezoelectric materials offer the advantages of high sensitivity, stability, accuracy and low power consumption. Because of these characteristics, they are widely applied in devices such as sensors, controllers and actuators. However, piezoelectric materials also show great potential for the medical manufacturing of artificial organs and for tissue regeneration and repair applications. For example, the use of piezoelectric materials in cochlear implants, cardiac pacemakers and other equipment may help to restore body function. Moreover, recent studies have shown that electrical signals play key roles in promoting tissue regeneration. In this context, the application of electrical signals generated by piezoelectric materials in processes such as bone healing, nerve regeneration and skin repair has become a prospective strategy. By mimicking the natural bioelectrical environment, piezoelectric materials can stimulate cell proliferation, differentiation and connection, thereby accelerating the process of self-repair in the body. However, many challenges remain to be overcome before these concepts can be applied in clinical practice, including material selection, biocompatibility and equipment design. On the basis of the principle of electrical signal regulation, this article reviews the definition, mechanism of action, classification, preparation and current biomedical applications of piezoelectric materials and discusses opportunities and challenges for their future clinical translation.
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Affiliation(s)
- Yifan Wu
- College of Life Sciences, Tiangong University, Binshuixi Road, Xiqing District, Tianjin 300387, China
- College of Life Sciences, Key Laboratory of Bioactive Materials (Ministry of Education), State Key Laboratory of Medicinal Chemical Biology, Nankai University, Weijin Road, Nankai District, Tianjin 300071, China
| | - Junwu Zou
- College of Life Sciences, Tiangong University, Binshuixi Road, Xiqing District, Tianjin 300387, China
| | - Kai Tang
- State Key Laboratory of Cardiovascular Disease, Department of Cardiovascular Surgery, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences, Peking Union Medical College, Fuwai Hospital, Beilishi Road, Xicheng District, Beijing 100037, China
| | - Ying Xia
- College of Life Sciences, Tiangong University, Binshuixi Road, Xiqing District, Tianjin 300387, China
| | - Xixi Wang
- College of Life Sciences, Tiangong University, Binshuixi Road, Xiqing District, Tianjin 300387, China
- Tianjin Key Laboratory of Biomaterial Research, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences and Peking Union Medical College, Baidi Road, Nankai District, Tianjin 300192, China
| | - Lili Song
- College of Life Sciences, Tiangong University, Binshuixi Road, Xiqing District, Tianjin 300387, China
- Tianjin Key Laboratory of Biomaterial Research, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences and Peking Union Medical College, Baidi Road, Nankai District, Tianjin 300192, China
| | - Jinhai Wang
- College of Life Sciences, Tiangong University, Binshuixi Road, Xiqing District, Tianjin 300387, China
| | - Kai Wang
- College of Life Sciences, Key Laboratory of Bioactive Materials (Ministry of Education), State Key Laboratory of Medicinal Chemical Biology, Nankai University, Weijin Road, Nankai District, Tianjin 300071, China
| | - Zhihong Wang
- Institute of Transplant Medicine, School of Medicine, Nankai University, Weijin Road, Nankai District, Tianjin 300071, China
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Wang N, Chen J, Hu Q, He Y, Shen P, Yang D, Wang H, Weng D, He Z. Small diameter vascular grafts: progress on electrospinning matrix/stem cell blending approach. Front Bioeng Biotechnol 2024; 12:1385032. [PMID: 38807647 PMCID: PMC11130446 DOI: 10.3389/fbioe.2024.1385032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2024] [Accepted: 05/06/2024] [Indexed: 05/30/2024] Open
Abstract
The exploration of the next-generation small diameter vascular grafts (SDVGs) will never stop until they possess high biocompatibility and patency comparable to autologous native blood vessels. Integrating biocompatible electrospinning (ES) matrices with highly bioactive stem cells (SCs) provides a rational and promising solution. ES is a simple, fast, flexible and universal technology to prepare extracellular matrix-like fibrous scaffolds in large scale, while SCs are valuable, multifunctional and favorable seed cells with special characteristics for the emerging field of cell therapy and regenerative medicine. Both ES matrices and SCs are advanced resources with medical application prospects, and the combination may share their advantages to drive the overcoming of the long-lasting hurdles in SDVG field. In this review, the advances on SDVGs based on ES matrices and SCs (including pluripotent SCs, multipotent SCs, and unipotent SCs) are sorted out, and current challenges and future prospects are discussed.
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Affiliation(s)
- Nuoxin Wang
- Key Laboratory of Cell Engineering of Guizhou Province, Affiliated Hospital of Zunyi Medical University, Zunyi, China
- The Clinical Stem Cell Research Institute, Affiliated Hospital of Zunyi Medical University, Zunyi, China
- Collaborative Innovation Center of Chinese Ministry of Education, Zunyi Medical University, Zunyi, China
- The First Clinical Institute, Zunyi Medical University, Zunyi, China
| | - Jiajing Chen
- Key Laboratory of Cell Engineering of Guizhou Province, Affiliated Hospital of Zunyi Medical University, Zunyi, China
- The Clinical Stem Cell Research Institute, Affiliated Hospital of Zunyi Medical University, Zunyi, China
- Collaborative Innovation Center of Chinese Ministry of Education, Zunyi Medical University, Zunyi, China
- The First Clinical Institute, Zunyi Medical University, Zunyi, China
| | - Qingqing Hu
- Key Laboratory of Cell Engineering of Guizhou Province, Affiliated Hospital of Zunyi Medical University, Zunyi, China
- The Clinical Stem Cell Research Institute, Affiliated Hospital of Zunyi Medical University, Zunyi, China
- Collaborative Innovation Center of Chinese Ministry of Education, Zunyi Medical University, Zunyi, China
- The First Clinical Institute, Zunyi Medical University, Zunyi, China
| | - Yunfeng He
- Key Laboratory of Cell Engineering of Guizhou Province, Affiliated Hospital of Zunyi Medical University, Zunyi, China
- The Clinical Stem Cell Research Institute, Affiliated Hospital of Zunyi Medical University, Zunyi, China
- Collaborative Innovation Center of Chinese Ministry of Education, Zunyi Medical University, Zunyi, China
- The First Clinical Institute, Zunyi Medical University, Zunyi, China
| | - Pu Shen
- Key Laboratory of Cell Engineering of Guizhou Province, Affiliated Hospital of Zunyi Medical University, Zunyi, China
- The Clinical Stem Cell Research Institute, Affiliated Hospital of Zunyi Medical University, Zunyi, China
- Collaborative Innovation Center of Chinese Ministry of Education, Zunyi Medical University, Zunyi, China
- The First Clinical Institute, Zunyi Medical University, Zunyi, China
| | - Dingkun Yang
- Key Laboratory of Cell Engineering of Guizhou Province, Affiliated Hospital of Zunyi Medical University, Zunyi, China
- The Clinical Stem Cell Research Institute, Affiliated Hospital of Zunyi Medical University, Zunyi, China
- Collaborative Innovation Center of Chinese Ministry of Education, Zunyi Medical University, Zunyi, China
- The First Clinical Institute, Zunyi Medical University, Zunyi, China
| | - Haoyuan Wang
- Key Laboratory of Cell Engineering of Guizhou Province, Affiliated Hospital of Zunyi Medical University, Zunyi, China
- Department of Cardiothoracic Surgery, The Second Affiliated Hospital of Zunyi Medical University, Zunyi, China
- The Second Clinical Institute, Zunyi Medical University, Zunyi, China
| | - Dong Weng
- Key Laboratory of Cell Engineering of Guizhou Province, Affiliated Hospital of Zunyi Medical University, Zunyi, China
- The Clinical Stem Cell Research Institute, Affiliated Hospital of Zunyi Medical University, Zunyi, China
- Collaborative Innovation Center of Chinese Ministry of Education, Zunyi Medical University, Zunyi, China
- The First Clinical Institute, Zunyi Medical University, Zunyi, China
| | - Zhixu He
- Key Laboratory of Cell Engineering of Guizhou Province, Affiliated Hospital of Zunyi Medical University, Zunyi, China
- The Clinical Stem Cell Research Institute, Affiliated Hospital of Zunyi Medical University, Zunyi, China
- Collaborative Innovation Center of Chinese Ministry of Education, Zunyi Medical University, Zunyi, China
- The First Clinical Institute, Zunyi Medical University, Zunyi, China
- Department of Pediatrics, Affiliated Hospital of Zunyi Medical University, Zunyi, China
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Han F, Meng Q, Xie E, Li K, Hu J, Chen Q, Li J, Han F. Engineered biomimetic micro/nano-materials for tissue regeneration. Front Bioeng Biotechnol 2023; 11:1205792. [PMID: 37469449 PMCID: PMC10352664 DOI: 10.3389/fbioe.2023.1205792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Accepted: 06/26/2023] [Indexed: 07/21/2023] Open
Abstract
The incidence of tissue and organ damage caused by various diseases is increasing worldwide. Tissue engineering is a promising strategy of tackling this problem because of its potential to regenerate or replace damaged tissues and organs. The biochemical and biophysical cues of biomaterials can stimulate and induce biological activities such as cell adhesion, proliferation and differentiation, and ultimately achieve tissue repair and regeneration. Micro/nano materials are a special type of biomaterial that can mimic the microstructure of tissues on a microscopic scale due to its precise construction, further providing scaffolds with specific three-dimensional structures to guide the activities of cells. The study and application of biomimetic micro/nano-materials have greatly promoted the development of tissue engineering. This review aims to provide an overview of the different types of micro/nanomaterials, their preparation methods and their application in tissue regeneration.
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Affiliation(s)
- Feng Han
- Department of Orthopaedic Surgery, The First Affiliated Hospital, Suzhou Medical College, Orthopedic Institute, Soochow University, Suzhou, Jiangsu, China
| | - Qingchen Meng
- Department of Orthopaedic Surgery, The First Affiliated Hospital, Suzhou Medical College, Orthopedic Institute, Soochow University, Suzhou, Jiangsu, China
| | - En Xie
- Department of Orthopaedic Surgery, The First Affiliated Hospital, Suzhou Medical College, Orthopedic Institute, Soochow University, Suzhou, Jiangsu, China
| | - Kexin Li
- Department of Orthopaedic Surgery, The First Affiliated Hospital, Suzhou Medical College, Orthopedic Institute, Soochow University, Suzhou, Jiangsu, China
| | - Jie Hu
- Department of Orthopaedic Surgery, The First Affiliated Hospital, Suzhou Medical College, Orthopedic Institute, Soochow University, Suzhou, Jiangsu, China
| | - Qianglong Chen
- Department of Orthopaedic Surgery, The First Affiliated Hospital, Suzhou Medical College, Orthopedic Institute, Soochow University, Suzhou, Jiangsu, China
| | - Jiaying Li
- Department of Orthopaedic Surgery, The First Affiliated Hospital, Suzhou Medical College, Orthopedic Institute, Soochow University, Suzhou, Jiangsu, China
| | - Fengxuan Han
- Department of Orthopaedic Surgery, The First Affiliated Hospital, Suzhou Medical College, Orthopedic Institute, Soochow University, Suzhou, Jiangsu, China
- China Orthopaedic Regenerative Medicine Group (CORMed), Hangzhou, Zhejiang, China
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Singh S, Kumar Paswan K, Kumar A, Gupta V, Sonker M, Ashhar Khan M, Kumar A, Shreyash N. Recent Advancements in Polyurethane-based Tissue Engineering. ACS APPLIED BIO MATERIALS 2023; 6:327-348. [PMID: 36719800 DOI: 10.1021/acsabm.2c00788] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
In tissue engineering, polyurethane-based implants have gained significant traction because of their high compatibility and inertness. The implants therefore show fewer side effects and lasts longer. Also, the mechanical properties can be tuned and morphed into a particular shape, owing to which polyurethanes show immense versatility. In the last 3 years, scientists have devised methods to enhance the strength of and induce dynamic properties in polyurethanes, and these developments offer an immense opportunity to use them in tissue engineering. The focus of this review is on applications of polyurethane implants for biomedical application with detailed analysis of hard tissue implants like bone tissues and soft tissues like cartilage, muscles, skeletal tissues, and blood vessels. The synthetic routes for the preparation of scaffolds have been discussed to gain a better understanding of the issues that arise regarding toxicity. The focus here is also on concerns regarding the biocompatibility of the implants, given that the precursors and byproducts are poisonous.
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Affiliation(s)
- Sukriti Singh
- Department of Chemical and Biochemical Engineering, Rajiv Gandhi Institute of Petroleum Technology, Mubarakpur Mukhatiya, Uttar Pradesh 229304, India
| | - Karan Kumar Paswan
- Department of Chemical and Biochemical Engineering, Rajiv Gandhi Institute of Petroleum Technology, Mubarakpur Mukhatiya, Uttar Pradesh 229304, India
| | - Alok Kumar
- Department of Chemical and Biochemical Engineering, Rajiv Gandhi Institute of Petroleum Technology, Mubarakpur Mukhatiya, Uttar Pradesh 229304, India
| | - Vishwas Gupta
- Department of Petroleum Engineering, Rajiv Gandhi Institute of Petroleum Technology, Mubarakpur Mukhatiya, Uttar Pradesh 229304, India
| | - Muskan Sonker
- Department of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Mohd Ashhar Khan
- Department of Chemical and Biological Engineering, State University of New York at Buffalo, Buffalo, New York 14260, United States
| | - Amrit Kumar
- Indian Oil Corporation Limited, Panipat Refinery, Panipat, Odisha 132140, India
| | - Nehil Shreyash
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204, United States
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Alnaser IA, Abdo HS, Abdo MS, Alkalla M, Fouly A. Effect of Synthesized Titanium Dioxide Nanofibers Weight Fraction on the Tribological Characteristics of Magnesium Nanocomposites Used in Biomedical Applications. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:294. [PMID: 36678046 PMCID: PMC9864214 DOI: 10.3390/nano13020294] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 01/06/2023] [Accepted: 01/07/2023] [Indexed: 06/17/2023]
Abstract
Biomedical applications, such as artificial implants, are very significant for the disabled due to their usage in orthopedics. Nevertheless, available materials in such applications have insufficient mechanical and tribological properties. The current study investigated the mechanical and tribological properties of a biomedical metallic material, magnesium (Mg), after incorporating titanium dioxide nanofibers (TiO2) with different loading fractions. The TiO2 nanofibers were synthesized using the electrospinning technique. The ball-milling technique was utilized to ensure the homogenous distribution of TiO2 nanofibers inside the Mg matrix. Then, samples of the mixed powder with different loading fractions of TiO2 nanofibers, 0, 1, 3, 5, and 10 wt.%, were fabricated using a high-frequency induction heat sintering technique. The physicomechanical and tribological properties of the produced Mg/TiO2 nanocomposites were evaluated experimentally. Results showed an enhancement in mechanical properties and wear resistance accompanied by an increase in the weight fraction of TiO2 nanofibers up to 5%. A finite element model was built to assess the load-carrying capacity of the Mg/TiO2 composite to estimate different contact stresses during the frictional process. The finite element results showed an agreement with the experimental results.
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Affiliation(s)
- Ibrahim A. Alnaser
- Mechanical Engineering Department, College of Engineering, King Saud University, Riyadh 11421, Saudi Arabia
| | - Hany S. Abdo
- Mechanical Design and Materials Department, Faculty of Energy Engineering, Aswan University, Aswan 81521, Egypt
| | - Mohamed S. Abdo
- Biomedical Engineering Department, Faculty of Engineering, Minia University, Minia 61519, Egypt
| | - Mohamed Alkalla
- Mechatronics Engineering and Intelligent Machines, School of Engineering, University of Central Lancashire, Preston PR1 2HE, UK
- Production Engineering and Mechanical Design Department, Mansoura University, Mansoura 35516, Egypt
| | - Ahmed Fouly
- Department of Production Engineering and Mechanical Design, Faculty of Engineering, Minia University, Minia 61519, Egypt
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Li T, Zhang T. The Application of Nanomaterials in Angiogenesis. Curr Stem Cell Res Ther 2021; 16:74-82. [PMID: 32066364 DOI: 10.2174/1574888x15666200211102203] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2019] [Revised: 12/16/2019] [Accepted: 01/07/2020] [Indexed: 02/08/2023]
Abstract
Induction of angiogenesis has enormous potential in the treatment of ischemic diseases and
the promotion of bulk tissue regeneration. However, the poor activity of angiogenic cells and proangiogenic
factors after transplantation is the main problem that imposes its wide applications. Recent
studies have found that the development of nanomaterials has solved this problem to some extent.
Nanomaterials can be mainly classified into inorganic nanomaterials represented by metals, metal oxides
and metal hydroxides, and organic nanomaterials including DNA tetrahedrons, graphene, graphene
oxide, and carbon nanotubes. These nanomaterials can induce the release of angiogenic factors
either directly or indirectly, thereby initiating a series of signaling pathways to induce angiogenesis.
Moreover, appropriate surface modifications of nanomaterial facilitate a variety of functions, such as
enhancing its biocompatibility and biostability. In clinical applications, nanomaterials can promote the
proliferation and differentiation of endothelial cells or mesenchymal stem cells, thereby promoting the
migration of hemangioblast cells to form new blood vessels. This review outlines the role of nanomaterials
in angiogenesis and is intended to provide new insights into the clinical treatment of systemic
and ischemic diseases.
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Affiliation(s)
- Tianle Li
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Tao Zhang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
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PEDOT:PSS-Coated Polybenzimidazole Electroconductive Nanofibers for Biomedical Applications. Polymers (Basel) 2021; 13:polym13162786. [PMID: 34451324 PMCID: PMC8401200 DOI: 10.3390/polym13162786] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Revised: 08/09/2021] [Accepted: 08/09/2021] [Indexed: 11/18/2022] Open
Abstract
Bioelectricity drives several processes in the human body. The development of new materials that can deliver electrical stimuli is gaining increasing attention in the field of tissue engineering. In this work, novel, highly electrically conductive nanofibers made of poly [2,2′-m-(phenylene)-5,5′-bibenzimidazole] (PBI) have been manufactured by electrospinning and then coated with cross-linked poly (3,4-ethylenedioxythiophene) doped with poly (styrene sulfonic acid) (PEDOT:PSS) by spin coating or dip coating. These scaffolds have been characterized by scanning electron microscopy (SEM) imaging and attenuated total reflectance Fourier-transform infrared (ATR-FTIR) spectroscopy. The electrical conductivity was measured by the four-probe method at values of 28.3 S·m−1 for spin coated fibers and 147 S·m−1 for dip coated samples, which correspond, respectively, to an increase of about 105 and 106 times in relation to the electrical conductivity of PBI fibers. Human bone marrow-derived mesenchymal stromal cells (hBM-MSCs) cultured on the produced scaffolds for one week showed high viability, typical morphology and proliferative capacity, as demonstrated by calcein fluorescence staining, 4′,6-diamidino-2-phenylindole (DAPI)/Phalloidin staining and MTT [3-(4,5-dimethylthiazol-2-yl)-2,5 diphenyl tetrazolium bromide] assay. Therefore, all fiber samples demonstrated biocompatibility. Overall, our findings highlight the great potential of PEDOT:PSS-coated PBI electrospun scaffolds for a wide variety of biomedical applications, including their use as reliable in vitro models to study pathologies and the development of strategies for the regeneration of electroactive tissues or in the design of new electrodes for in vivo electrical stimulation protocols.
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Taskin MB, Ahmad T, Wistlich L, Meinel L, Schmitz M, Rossi A, Groll J. Bioactive Electrospun Fibers: Fabrication Strategies and a Critical Review of Surface-Sensitive Characterization and Quantification. Chem Rev 2021; 121:11194-11237. [DOI: 10.1021/acs.chemrev.0c00816] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Mehmet Berat Taskin
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, University of Würzburg, 97070 Würzburg, Germany
| | - Taufiq Ahmad
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, University of Würzburg, 97070 Würzburg, Germany
| | - Laura Wistlich
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, University of Würzburg, 97070 Würzburg, Germany
| | - Lorenz Meinel
- Institute of Pharmacy and Food Chemistry and Helmholtz Institute for RNA Based Infection Research, 97074 Würzburg, Germany
| | - Michael Schmitz
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, University of Würzburg, 97070 Würzburg, Germany
| | - Angela Rossi
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, University of Würzburg, 97070 Würzburg, Germany
| | - Jürgen Groll
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, University of Würzburg, 97070 Würzburg, Germany
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Bellani C, Yue K, Flaig F, Hébraud A, Ray P, Annabi N, Selistre de Araújo HS, Branciforti MC, Minarelli Gaspar AM, Shin SR, Khademhosseini A, Schlatter G. Suturable elastomeric tubular grafts with patterned porosity for rapid vascularization of 3D constructs. Biofabrication 2021; 13. [PMID: 33482658 DOI: 10.1088/1758-5090/abdf1d] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Accepted: 01/22/2021] [Indexed: 12/11/2022]
Abstract
Vascularization is considered to be one of the key challenges in engineering functional 3D tissues. Engineering suturable vascular grafts containing pores with diameter of several tens of microns in tissue engineered constructs may provide an instantaneous blood perfusion through the grafts improving cell infiltration and thus, allowing rapid vascularization and vascular branching. The aim of this work was to develop suturable tubular scaffolds to be integrated in biofabricated constructs, enabling the direct connection of the biofabricated construct with the host blood stream, providing an immediate blood flow inside the construct. Here, tubular grafts with customizable shapes (tubes, Y-shape capillaries) and controlled diameter ranging from several hundreds of microns to few mm are fabricated based on poly(glycerol sebacate) (PGS) / poly(vinyl alcohol) (PVA) electrospun scaffolds. Furthermore, a network of pore channels of diameter in the order of 100 µm was machined by laser femtosecond ablation in the tube wall. Both non-machined and laser machined tubular scaffolds elongated more than 100% of their original size have shown suture retention, being 5.85 and 3.96 N/mm2 respectively. To demonstrate the potential of application, the laser machined porous grafts were embedded in gelatin methacryloyl (GelMA) hydrogels, resulting in elastomeric porous tubular graft/GelMA 3D constructs. These constructs were then co-seeded with osteoblast-like cells (MG-63) at the external side of the graft and endothelial cells (HUVEC) inside, forming a bone osteon model. The laser machined pore network allowed an immediate endothelial cell flow towards the osteoblasts enabling the osteoblasts and endothelial cells to interact and form 3D structures. This rapid vascularization approach could be applied, not only for bone tissue regeneration, but also for a variety of tissues and organs.
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Affiliation(s)
- Caroline Bellani
- University of Sao Paulo, AVENIDA TRABALHADOR SÃO-CARLENSE, 400, Sao Carlos, São Paulo, 13566-590, BRAZIL
| | - Kan Yue
- South China Advanced Institute for Soft Matter Science and Technology, South China University of Technology, 381 Wushan Rd, Guangzhou, Guangdong, 510641, CHINA
| | - Florence Flaig
- ICPEES, University of Strasbourg, 25 rue Bécquerel, Strasbourg, 67087, FRANCE
| | - Anne Hébraud
- ICPEES, 25 rue Bécquerel, Strasbourg, 67087, FRANCE
| | - Pengfei Ray
- Division of Health Sciences and Technology, MIT, 45 Carleton Street, Cambridge, Massachusetts, 02142, UNITED STATES
| | - Nasim Annabi
- Department of Chemical and Biomolecular Engineering, UCLA, 5531 Boelter Hall, Los Angeles, California, CA 90095, UNITED STATES
| | | | - Marcia Cristina Branciforti
- Depatament of Materials Engineering, University of Sao Paulo, AVENIDA TRABALHADOR SÃO-CARLENSE, 400, ARNOLD SCHMITED, SAO CARLOS, Sao Paulo, SAO PAULO, 13566-590, BRAZIL
| | - Ana Maria Minarelli Gaspar
- Department of Morphology, School of Dentistry at Araraquara, Sao Paulo State University Julio de Mesquita Filho, R. Humaitá, 1680, Araraquara, SP, 14801-385, BRAZIL
| | - Su Ryon Shin
- Medicine, Harvard Medical School, 25 Shattuck Street, Boston, Massachusetts, MA 02115, UNITED STATES
| | - Ali Khademhosseini
- Department of Chemical and Biomolecular Engineering, UCLA, 5531 Boelter Hall, Los Angeles, California, CA 90095, UNITED STATES
| | - Guy Schlatter
- ICPEES, University of Strasbourg, 25 rue Bécquerel, Strasbourg, 67087, FRANCE
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Patil VA, Masters KS. Engineered Collagen Matrices. Bioengineering (Basel) 2020; 7:E163. [PMID: 33339157 PMCID: PMC7765577 DOI: 10.3390/bioengineering7040163] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Revised: 12/11/2020] [Accepted: 12/15/2020] [Indexed: 01/10/2023] Open
Abstract
Collagen is the most abundant protein in mammals, accounting for approximately one-third of the total protein in the human body. Thus, it is a logical choice for the creation of biomimetic environments, and there is a long history of using collagen matrices for various tissue engineering applications. However, from a biomaterial perspective, the use of collagen-only scaffolds is associated with many challenges. Namely, the mechanical properties of collagen matrices can be difficult to tune across a wide range of values, and collagen itself is not highly amenable to direct chemical modification without affecting its architecture or bioactivity. Thus, many approaches have been pursued to design scaffold environments that display critical features of collagen but enable improved tunability of physical and biological characteristics. This paper provides a brief overview of approaches that have been employed to create such engineered collagen matrices. Specifically, these approaches include blending of collagen with other natural or synthetic polymers, chemical modifications of denatured collagen, de novo creation of collagen-mimetic chains, and reductionist methods to incorporate collagen moieties into other materials. These advancements in the creation of tunable, engineered collagen matrices will continue to enable the interrogation of novel and increasingly complex biological questions.
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Affiliation(s)
| | - Kristyn S. Masters
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI 53705, USA;
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Biofunctionalization of Textile Materials. 3. Fabrication of Poly(lactide)-Potassium Iodide Composites with Antifungal Properties. COATINGS 2020. [DOI: 10.3390/coatings10060593] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The paper presents a method of obtaining poly(lactide) (PLA) nonwoven fabrics with antifungal properties using potassium iodide as a nonwoven modifying agent. PLA nonwoven fabrics were obtained by the melt-blown technique and subsequently surface modified (PLA→PLA-SM-KI) by the dip-coating method. The analysis of these PLA-SM-KI (0.1%–2%) composites included Scanning Electron Microscopy (SEM), UV/VIS transmittance, FTIR spectrometry and air permeability. The nonwovens were subjected to microbial activity tests against Aspergillus niger fungal mold species, exhibiting substantial antifungal activity. The studies showed that PLA-KI hybrids containing 2% KI have appropriate mechanical properties, morphology and demanded antimicrobial properties to be further developed as a potential antimicrobial, biodegradable material.
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Biofunctionalization of Textile Materials. 2. Antimicrobial Modification of Poly(lactide) (PLA) Nonwoven Fabricsby Fosfomycin. Polymers (Basel) 2020; 12:polym12040768. [PMID: 32244602 PMCID: PMC7240420 DOI: 10.3390/polym12040768] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 03/24/2020] [Accepted: 03/26/2020] [Indexed: 01/19/2023] Open
Abstract
This research is focused on obtaining antimicrobial hybrid materials consisting of poly(lactide) nonwoven fabrics and using phosphoro-organic compound—fosfomycin—as a coating and modifying agent. Polylactide (PLA) presents biodegradable polymer with multifunctional application, widely engaged in medical related areas. Fosfomycin as functionalized phosphonates presents antibiotic properties expressed by broad spectrum of antimicrobial properties. The analysis of these biofunctionalized nonwoven fabrics processed by the melt-blown technique, included: scanning electron microscopy (SEM), UV/VIS transmittance, FTIR spectrometry, air permeability. The functionalized nonwovens were tested on microbial activity tests against colonies of gram-positive (Staphylococcus aureus) and gram-negative (Escherichia coli) bacteria.
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Hung HS, Hsu SH. Surface Modification by Nanobiomaterials for Vascular Tissue Engineering Applications. Curr Med Chem 2020; 27:1634-1646. [DOI: 10.2174/0929867325666180914104633] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Revised: 05/17/2017] [Accepted: 06/16/2017] [Indexed: 12/13/2022]
Abstract
Treatment of cardiovascular disease has achieved great success using artificial implants,
particularly synthetic-polymer made grafts. However, thrombus formation and
restenosis are the current clinical problems need to be conquered. New biomaterials, modifying
the surface of synthetic vascular grafts, have been created to improve long-term patency
for the better hemocompatibility. The vascular biomaterials can be fabricated from synthetic
or natural polymers for vascular tissue engineering. Stem cells can be seeded by different
techniques into tissue-engineered vascular grafts in vitro and implanted in vivo to repair the
vascular tissues. To overcome the thrombogenesis and promote the endothelialization
effect, vascular biomaterials employing nanotopography are more bio-mimic to the native tissue
made and have been engineered by various approaches such as prepared as a simple surface
coating on the vascular biomaterials. It has now become an important and interesting
field to find novel approaches to better endothelization of vascular biomaterials. In this article,
we focus to review the techniques with better potential improving endothelization and summarize
for vascular biomaterial application. This review article will enable the development
of biomaterials with a high degree of originality, innovative research on novel techniques for
surface fabrication for vascular biomaterials application.
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Affiliation(s)
- Huey-Shan Hung
- Graduate Institute of Biomedical Science, China Medical University, Taichung, Taiwan, China
| | - Shan-hui Hsu
- Institute of Polymer Science and Engineering, National Taiwan University, Taipei, Taiwan, China
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Zaszczynska A, Sajkiewicz P, Gradys A. Piezoelectric Scaffolds as Smart Materials for Neural Tissue Engineering. Polymers (Basel) 2020; 12:E161. [PMID: 31936240 PMCID: PMC7022784 DOI: 10.3390/polym12010161] [Citation(s) in RCA: 63] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 12/31/2019] [Accepted: 01/05/2020] [Indexed: 01/03/2023] Open
Abstract
Injury to the central or peripheral nervous systems leads to the loss of cognitive and/or sensorimotor capabilities, which still lacks an effective treatment. Tissue engineering in the post-injury brain represents a promising option for cellular replacement and rescue, providing a cell scaffold for either transplanted or resident cells. Tissue engineering relies on scaffolds for supporting cell differentiation and growth with recent emphasis on stimuli responsive scaffolds, sometimes called smart scaffolds. One of the representatives of this material group is piezoelectric scaffolds, being able to generate electrical charges under mechanical stimulation, which creates a real prospect for using such scaffolds in non-invasive therapy of neural tissue. This paper summarizes the recent knowledge on piezoelectric materials used for tissue engineering, especially neural tissue engineering. The most used materials for tissue engineering strategies are reported together with the main achievements, challenges, and future needs for research and actual therapies. This review provides thus a compilation of the most relevant results and strategies and serves as a starting point for novel research pathways in the most relevant and challenging open questions.
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Affiliation(s)
- Angelika Zaszczynska
- Institute of Fundamental Technological Research, Polish Academy of Sciences, Pawinskiego 5b St., 02-106 Warsaw, Poland
| | - Paweł Sajkiewicz
- Institute of Fundamental Technological Research, Polish Academy of Sciences, Pawinskiego 5b St., 02-106 Warsaw, Poland
| | - Arkadiusz Gradys
- Institute of Fundamental Technological Research, Polish Academy of Sciences, Pawinskiego 5b St., 02-106 Warsaw, Poland
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15
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Aslani S, Kabiri M, Kehtari M, Hanaee-Ahvaz H. Vascular tissue engineering: Fabrication and characterization of acetylsalicylic acid-loaded electrospun scaffolds coated with amniotic membrane lysate. J Cell Physiol 2019; 234:16080-16096. [PMID: 30779117 DOI: 10.1002/jcp.28266] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2017] [Revised: 12/26/2018] [Accepted: 01/10/2019] [Indexed: 01/24/2023]
Abstract
As the incidence of small-diameter vascular graft (SDVG) occlusion is considerably high, a great amount of research is focused on constructing a more biocompatible graft. The absence of a biocompatible surface in the lumen of the engineered grafts that can support confluent lining with endothelial cells (ECs) can cause thrombosis and graft failure. Blood clot formation is mainly because of the lack of an integrated endothelium. The most effective approach to combat this problem would be using natural extracellular matrix constituents as a mimic of endothelial basement membrane along with applying anticoagulant agents to provide local antithrombotic effects. In this study, we fabricated aligned and random electrospun poly-L-lactic acid (PLLA) scaffolds containing acetylsalicylic acid (ASA) as the anticoagulation agent and surface coated them with amniotic membrane (AM) lysate. Vascular scaffolds were structurally and mechanically characterized and assessed for cyto- and hemocompatibility and their ability to support endothelial differentiation was examined. All the scaffolds showed appropriate tensile strength as expected for vascular grafts. Lack of cytotoxicity, cellular attachment, growth, and infiltration were proved using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay and scanning electron microscopy. The blood compatibilities of different scaffolds examined by in vitro hemolysis and blood coagulation assays elucidated the excellent hemocompatibility of our novel AM-coated ASA-loaded nanofibers. Drug-loaded scaffolds showed a sustained release profile of ASA in 7 days. AM-coated electrospun PLLA fibers showed enhanced cytocompatibility for human umbilical vein ECs, making a confluent endothelial-like lining. In addition, AM lysate-coated ASA-PLLA-aligned scaffold proved to support endothelial differentiation of Wharton's jelly-derived mesenchymal stem cells. Our results together indicated that AM lysate-coated ASA releasing scaffolds have promising potentials for development of a biocompatible SDVG.
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Affiliation(s)
- Saba Aslani
- Department of Biotechnology, College of Science, University of Tehran, Tehran, Iran.,Department of Neurology and Neurosurgery, McGill University, Quebec, Canada.,Department of Molecular biology and genetic engineering and Department of nanotechnology and tissue engineering, Stem Cell Technology Research Center, Tehran, Iran
| | - Mahboubeh Kabiri
- Department of Biotechnology, College of Science, University of Tehran, Tehran, Iran
| | - Mousa Kehtari
- Department of Molecular biology and genetic engineering and Department of nanotechnology and tissue engineering, Stem Cell Technology Research Center, Tehran, Iran.,Developmental Biology Laboratory, School of Biology, College of Science, University of Tehran, Tehran, Iran
| | - Hana Hanaee-Ahvaz
- Department of Molecular biology and genetic engineering and Department of nanotechnology and tissue engineering, Stem Cell Technology Research Center, Tehran, Iran
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16
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Ezhilarasu H, Sadiq A, Ratheesh G, Sridhar S, Ramakrishna S, Ab Rahim MH, Yusoff MM, Jose R, Reddy VJ. Functionalized core/shell nanofibers for the differentiation of mesenchymal stem cells for vascular tissue engineering. Nanomedicine (Lond) 2018; 14:201-214. [PMID: 30526272 DOI: 10.2217/nnm-2018-0271] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
AIM Atherosclerosis is a common cardiovascular disease causing medical problems globally leading to coronary artery bypass surgery. The present study is to fabricate core/shell nanofibers to encapsulate VEGF for the differentiation of mesenchymal stem cells (MSCs) into smooth muscle cells to develop vascular grafts. MATERIALS & METHODS The fabricated core/shell nanofibers contained polycaprolactone/gelatin as the shell, and silk fibroin/VEGF as the core materials. RESULTS The results observed that the core/shell nanofibers interact to differentiate MSCs into smooth muscle cells by the expression of vascular smooth muscle cell (VSMC) contractile proteins α-actinin, myosin and F-actin. CONCLUSION The functionalized polycaprolactone/gelatin/silk fibroin/VEGF (250 ng) core/shell nanofibers were fabricated for the controlled release of VEGF in a persistent manner for the differentiation of MSCs into smooth muscle cells for vascular tissue engineering.
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Affiliation(s)
- Hariharan Ezhilarasu
- Department of Mechanical Engineering, Center for Nanofibers & Nanotechnology, Faculty of Engineering, National University of Singapore, Singapore
| | - Asif Sadiq
- Department of Mechanical Engineering, Center for Nanofibers & Nanotechnology, Faculty of Engineering, National University of Singapore, Singapore
| | - Greeshma Ratheesh
- Institute of Health & Biomedical Innovation, Science & Engineering Faculty, Queensland University of Technology (QUT), Australia
| | - Sreepathy Sridhar
- Department of Mechanical & Construction Engineering, Northumbria University, Newcastle upon Tyne, NE1 8ST, UK
| | - Seeram Ramakrishna
- Department of Mechanical Engineering, Center for Nanofibers & Nanotechnology, Faculty of Engineering, National University of Singapore, Singapore
| | - Mohd Hasbi Ab Rahim
- Faculty of Industrial Sciences & Technology, Universiti Malaysia Pahang, 26300 Gambang, Kuantan, Pahang, Malaysia
| | - Mashitah M Yusoff
- Faculty of Industrial Sciences & Technology, Universiti Malaysia Pahang, 26300 Gambang, Kuantan, Pahang, Malaysia
| | - Rajan Jose
- Faculty of Industrial Sciences & Technology, Universiti Malaysia Pahang, 26300 Gambang, Kuantan, Pahang, Malaysia
| | - Venugopal Jayarama Reddy
- Department of Mechanical Engineering, Center for Nanofibers & Nanotechnology, Faculty of Engineering, National University of Singapore, Singapore.,Faculty of Industrial Sciences & Technology, Universiti Malaysia Pahang, 26300 Gambang, Kuantan, Pahang, Malaysia
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17
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Affiliation(s)
- Timothy D Usher
- Department of Physics California State University San Bernardino San Bernardino CA USA
| | - Kimberley R Cousins
- Department of Chemistry and Biochemistry California State University San Bernardino San Bernardino CA USA
| | - Renwu Zhang
- Department of Chemistry and Biochemistry California State University San Bernardino San Bernardino CA USA
| | - Stephen Ducharme
- Department of Physics and Astronomy Nebraska Center for Materials and Nanoscience, University of Nebraska Lincoln Lincoln NE USA
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18
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Jiang YC, Jiao HL, Lee MS, Wang T, Turng LS, Li Q, Li WJ. Endogenous biological factors modulated by substrate stiffness regulate endothelial differentiation of mesenchymal stem cells. J Biomed Mater Res A 2018; 106:1595-1603. [DOI: 10.1002/jbm.a.36362] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2017] [Revised: 01/19/2018] [Accepted: 02/01/2018] [Indexed: 11/05/2022]
Affiliation(s)
- Yong-Chao Jiang
- National Center for International Research of Micro-Nano Molding Technology, Zhengzhou University; Zhengzhou 450001 China
- School of Mechanics and Engineering Science; Zhengzhou University; Zhengzhou 450001 China
- Department of Mechanical Engineering; University of Wisconsin-Madison; Madison Wisconsin 53705
| | - Hong-Li Jiao
- Department of Orthopedics and Rehabilitation; University of Wisconsin-Madison; Madison Wisconsin 53705
| | - Ming-Song Lee
- Department of Orthopedics and Rehabilitation; University of Wisconsin-Madison; Madison Wisconsin 53705
- Department of Biomedical Engineering; University of Wisconsin-Madison; Madison Wisconsin 53705
| | - To Wang
- Department of Orthopedics and Rehabilitation; University of Wisconsin-Madison; Madison Wisconsin 53705
- Department of Biomedical Engineering; University of Wisconsin-Madison; Madison Wisconsin 53705
| | - Lih-Sheng Turng
- Department of Mechanical Engineering; University of Wisconsin-Madison; Madison Wisconsin 53705
| | - Qian Li
- National Center for International Research of Micro-Nano Molding Technology, Zhengzhou University; Zhengzhou 450001 China
| | - Wan-Ju Li
- Department of Orthopedics and Rehabilitation; University of Wisconsin-Madison; Madison Wisconsin 53705
- Department of Biomedical Engineering; University of Wisconsin-Madison; Madison Wisconsin 53705
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19
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Narayanan K, Mishra S, Singh S, Pei M, Gulyas B, Padmanabhan P. Engineering Concepts in Stem Cell Research. Biotechnol J 2017; 12. [PMID: 28901712 DOI: 10.1002/biot.201700066] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2017] [Revised: 09/07/2017] [Indexed: 12/15/2022]
Abstract
The field of regenerative medicine integrates advancements made in stem cells, molecular biology, engineering, and clinical methodologies. Stem cells serve as a fundamental ingredient for therapeutic application in regenerative medicine. Apart from stem cells, engineering concepts have equally contributed to the success of stem cell based applications in improving human health. The purpose of various engineering methodologies is to develop regenerative and preventive medicine to combat various diseases and deformities. Explosion of stem cell discoveries and their implementation in clinical setting warrants new engineering concepts and new biomaterials. Biomaterials, microfluidics, and nanotechnology are the major engineering concepts used for the implementation of stem cells in regenerative medicine. Many of these engineering technologies target the specific niche of the cell for better functional capability. Controlling the niche is the key for various developmental activities leading to organogenesis and tissue homeostasis. Biomimetic understanding not only helped to improve the design of the matrices or scaffolds by incorporating suitable biological and physical components, but also ultimately aided adoption of designs that helped these materials/devices have better function. Adoption of engineering concepts in stem cell research improved overall achievement, however, several important issues such as long-term effects with respect to systems biology needs to be addressed. Here, in this review the authors will highlight some interesting breakthroughs in stem cell biology that use engineering methodologies.
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Affiliation(s)
- Karthikeyan Narayanan
- Stem Cell and Tissue Engineering Laboratory, Department of Orthopaedics and Division of Exercise Physiology, West Virginia University, PO Box 9196, One Medical Center Drive, 2 Morgantown, WV 26505-9196, USA
| | - Sachin Mishra
- Lee Kong Chian School of Medicine, Nanyang Technological University, 59 Nanyang Drive, Singapore 636921, Singapore
| | - Satnam Singh
- Lee Kong Chian School of Medicine, Nanyang Technological University, 59 Nanyang Drive, Singapore 636921, Singapore
| | - Ming Pei
- Stem Cell and Tissue Engineering Laboratory, Department of Orthopaedics and Division of Exercise Physiology, West Virginia University, PO Box 9196, One Medical Center Drive, 2 Morgantown, WV 26505-9196, USA
| | - Balazs Gulyas
- Lee Kong Chian School of Medicine, Nanyang Technological University, 59 Nanyang Drive, Singapore 636921, Singapore
| | - Parasuraman Padmanabhan
- Lee Kong Chian School of Medicine, Nanyang Technological University, 59 Nanyang Drive, Singapore 636921, Singapore
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20
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Peritoneal pre-conditioning reduces macrophage marker expression in collagen-containing engineered vascular grafts. Acta Biomater 2017; 64:80-93. [PMID: 28987784 DOI: 10.1016/j.actbio.2017.10.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Revised: 09/16/2017] [Accepted: 10/04/2017] [Indexed: 02/08/2023]
Abstract
Engineered vascular grafts have shown promise as arteriovenous shunts, but they have not yet progressed to clinical trials for coronary arteries <4 mm in diameter such as the coronary arteries. Control over initial biomaterial properties and remodeling are necessary to generate viable grafts. In this study, we blended collagen with a synthetic material, poly(ε-caprolactone), to modulate the post-grafting inflammatory response while avoiding aneurysmal-like dilation and failure that can occur with pure collagen grafts. We also used pre-implantation in an "in vivo bioreactor" to recruit autologous cells and improve patency after grafting. Electrospun conduits were pre-implanted within rat peritoneal cavities and then grafted autologously into abdominal aortae. Conduit collagen percentages and pre-implantation were tested for their impact on graft remodeling and patency. Burst pressures >2000 mmHg, reproducible expansion with systole/diastole, and maintenance of mechanical integrity were observed. More importantly, peritoneal pre-implantation reduced overall lipid oxidation, intimal layer thickness, and expression of an M1 macrophage marker. The condition with the most collagen, 25%, exhibited the lowest expression of macrophage markers but also resulted in a thicker intimal layer. Overall, the 10% collagen/PCL with peritoneal pre-implantation condition appeared to exhibit the best combination of responses, and may result in improved clinical graft viability. STATEMENT OF SIGNIFICANCE This manuscript describes a rodent study to systematically determine the benefits of both pre-implantation in the peritoneal cavity and specific ratios of collagen on engineered vascular graft viability. We show that pre-implantation had a significant benefit, including decreasing the expression of macrophage markers and reducing lipid oxidation after grafting. This study is the first time that the benefits of peritoneal pre-implantation have been compared to an "off the shelf," directly grafted control condition. We also demonstrated the importance of specific collagen ratio on the response after grafting. Overall, we feel that this article will be of interest to the field and it has the potential to address a significant clinical need: a graft for coronary arteries <4 mm in diameter.
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21
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Liu S, Sun X, Wang T, Chen S, Zeng CG, Xie G, Zhu Q, Liu X, Quan D. Nano-fibrous and ladder-like multi-channel nerve conduits: Degradation and modification by gelatin. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 83:130-142. [PMID: 29208270 DOI: 10.1016/j.msec.2017.11.020] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Revised: 09/11/2017] [Accepted: 11/20/2017] [Indexed: 11/17/2022]
Abstract
We recently fabricated multi-channel PLLA nerve conduits (NCs, conduits diameter: ~3mm, channels diameter: ~200μm) with nano-fibrous microstructure (NNCs) and ladder-like microstructure (LNCs), and found the nanofibers in the NNCs promote differentiation of nerve stem cells (NSCs) into neurons. In the present study, we evaluated the degradation profile of NNCs and LNCs, and observed that NNCs degraded too fast to implant. To delay the degradation and retain the nano-scale effect of NNCs, we used gelatin to wrap (2% w/v gelatin) or embed (8% w/v gelatin) NNCs and LNCs via vacuum infusion and chemical cross-linking with genipin. NNCs-wrapped maintained their original nano-fibrous microstructure, but NNCs-embedded presented a porous morphology without nanofibers appearing. Incorporation of gelatin did not change their compressive moduli, but increased the creep recovery ratios of LNCs and NNCs. In vitro degradation revealed that integrity was maintained and the mass loss was <5% for NNCs-wrapped after 10weeks, in comparison with 15% mass loss and collapsed structure of the pure NNCs after 4weeks. Meanwhile, there were no obvious changes in the degradation of LNCs with modification. Nerve stem cells (NSCs) were then seeded onto the six NCs represented as: NNCs, NNCs-wrapped, NNCs-embedded, LNCs, LNCs-wrapped, and LNCs-embedded. Immunocytochemistry analysis demonstrated that gelatin coating enhanced the adhesion and proliferation of NSCs, and the NNCs-wrapped scaffold promoted the differentiation proportion of NSCs into neurons from 25.8% (on pure NNCs) to 53.4% after 14days of seeding. On the other hand, only 14.3% of neurons were derived from the differentiation of the seeded NSCs on the NNCs-embedded. NNCs-wrapped would be a good choice for future studies in nerve injury repair in vivo due to its appropriate degradation rate, flexibility, and nano-scale effect.
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Affiliation(s)
- Sheng Liu
- PCFM Lab, GD HPPC Lab, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China.
| | - Xiumin Sun
- PCFM Lab, GD HPPC Lab, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China
| | - Tao Wang
- Department of Orthopedic and Microsurgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
| | - Shihao Chen
- PCFM Lab, GD HPPC Lab, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China.
| | - Chen-Guang Zeng
- PCFM Lab, GD HPPC Lab, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China.
| | - Gaoyi Xie
- PCFM Lab, GD HPPC Lab, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China
| | - Qingtang Zhu
- Department of Orthopedic and Microsurgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China; Center for Peripheral Nerve Tissue-Engineering and Technology Research, Guangzhou 510080, China
| | - Xiaolin Liu
- Department of Orthopedic and Microsurgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China; Center for Peripheral Nerve Tissue-Engineering and Technology Research, Guangzhou 510080, China
| | - Daping Quan
- PCFM Lab, GD HPPC Lab, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China; GD Functional Biomaterials Engineering Technology Research Center, School of Materials Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, China; Center for Peripheral Nerve Tissue-Engineering and Technology Research, Guangzhou 510080, China.
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22
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Wu S, Peng H, Li X, Streubel PN, Liu Y, Duan B. Effect of scaffold morphology and cell co-culture on tenogenic differentiation of HADMSC on centrifugal melt electrospun poly (L‑lactic acid) fibrous meshes. Biofabrication 2017; 9:044106. [PMID: 29134948 PMCID: PMC5849472 DOI: 10.1088/1758-5090/aa8fb8] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Engineered tendon grafts offer a promising alternative for grafting during the reconstruction of complex tendon tears. The tissue-engineered tendon substitutes have the advantage of increased biosafety and the option to customize their biochemical and biophysical properties to promote tendon regeneration. In this study, we developed a novel centrifugal melt electrospinning (CME) technique, with the goal of optimizing the fabrication parameters to generate fibrous scaffolds for tendon tissue engineering. The effects of CME processing parameters, including rotational speed, voltage, and temperature, on fiber properties (i.e. orientation, mean diameter, and productivity) were systematically investigated. By using this solvent-free and environmentally friendly method, we fabricated both random and aligned poly (L-lactic acid) (PLLA) fibrous scaffolds with controllable mesh thickness. We also investigated and compared their morphology, surface hydrophilicity, and mechanical properties. We seeded human adipose derived mesenchymal stem cells (HADMSC) on various PLLA fibrous scaffolds and conditioned the constructs in tenogenic differentiation medium for up to 21 days, to investigate the effects of fiber alignment and scaffold thickness on cell behavior. Aligned fibrous scaffolds induced cell elongation and orientation through a contact guidance phenomenon and promoted HADMSC proliferation and differentiation towards tenocytes. At the early stage, thinner scaffolds were beneficial for HADMSC proliferation, but the scaffold thickness had no significant effects on cell proliferation for longer-term cell culture. We further co-seeded HADMSC and human umbilical vein endothelial cells (HUVEC) on aligned PLLA fibrous mats and determined how the vascularization affected HADMSC tenogenesis. We found that co-cultured HADMSC-HUVEC expressed more tendon-related markers on the aligned fibrous scaffold. The co-culture systems promoted in vitro HADMSC differentiation towards tenocytes. These aligned fibrous scaffolds fabricated by CME technique could potentially be utilized to repair and regenerate tendon defects and injuries with cell co-culture and controlled vascularization.
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Affiliation(s)
- Shaohua Wu
- Mary & Dick Holland Regenerative Medicine Program, University of Nebraska Medical Center, Omaha, NE, USA
- Division of Cardiology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, USA
| | - Hao Peng
- College of Mechanical and Electric Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Xiuhong Li
- College of Mechanical and Electric Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Philipp N. Streubel
- Department of Orthopedic Surgery and Rehabilitation, University of Nebraska Medical Center, Omaha, NE, USA
| | - Yong Liu
- College of Mechanical and Electric Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Bin Duan
- Mary & Dick Holland Regenerative Medicine Program, University of Nebraska Medical Center, Omaha, NE, USA
- Division of Cardiology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, USA
- Department of Surgery, College of Medicine, University of Nebraska Medical Center, Omaha, NE, USA
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23
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Hsieh YF, Sahagian K, Huang F, Xu K, Patel S, Li S. Comparison of plasma and chemical modifications of poly-L-lactide-co-caprolactone scaffolds for heparin conjugation. ACTA ACUST UNITED AC 2017; 12:065004. [PMID: 28980527 DOI: 10.1088/1748-605x/aa81aa] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Biodegradable polymers have potential as a scaffold material for making small diameter artery bypass grafts. To resist thrombosis, maintain biocompatibility and enhance the remodeling of the grafts, it is crucial to modify polymer scaffolds so that the grafts have antithrombogenic capacity and allow cell infiltration. In this study, two methods of aminolysis on electrospun poly-L-lactide-co-caprolactone (PLCL) microfiber vascular grafts are compared: plasma treatment method and Fmoc-PEG-diamine insertion method. Both methods successfully inserted amino groups on the polymer graft for heparin conjugation. However, plasma treatment resulted in significantly higher initial heparin density and higher heparin stability on PLCL microfibers than Fmoc-PEG-diamine treatment. In addition, mechanical testing demonstrated that the plasma treatment method maintained PLCL microfiber tensile strength after heparin conjugation. Fmoc-PEG-diamine insertion method compromised the mechanical property due to partial fiber melting and structure disruption. Subcutaneous implantation of the grafts in a rat model showed that heparin coating with both methods promoted cell infiltration. This study provides a rationale to optimize the biomolecule conjugation on electrospun PLCL scaffolds, and will have applications in tissue engineering vascular grafts and other tissues.
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Affiliation(s)
- Yu-Fang Hsieh
- Department of Bioengineering, University of California at Berkeley, CA, United States of America
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Li J, Ding J, Liu T, Liu JF, Yan L, Chen X. Poly(lactic acid) Controlled Drug Delivery. INDUSTRIAL APPLICATIONS OF POLY(LACTIC ACID) 2017. [DOI: 10.1007/12_2017_11] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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25
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Hsieh SC, Chen HJ, Hsu SH, Yang YC, Tang CM, Chu MY, Lin PY, Fu RH, Kung ML, Chen YW, Yeh BW, Hung HS. Prominent Vascularization Capacity of Mesenchymal Stem Cells in Collagen-Gold Nanocomposites. ACS APPLIED MATERIALS & INTERFACES 2016; 8:28982-29000. [PMID: 27714998 DOI: 10.1021/acsami.6b09330] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The ideal characteristics of surface modification on the vascular graft for clinical application would be with excellent hemocompatibility, endothelialization capacity, and antirestenosis ability. Here, Fourier transform infrared spectroscopy (FTIR), surface enhanced Raman spectroscopy (SERS), atomic force microscopy (AFM), contact angle (θ) measurement, and thermogravimetric analysis (TGA) were used to evaluate the chemical and mechanical properties of collagen-gold nanocomposites (collagen+Au) with 17.4, 43.5, and 174 ppm of Au and suggested that the collagen+Au with 43.5 ppm of Au had better biomechanical properties and thermal stability than pure collagen. Besides, stromal-derived factor-1α (SDF-1α) at 50 ng/mL promoted the migration of mesenchymal stem cells (MSCs) on collagen+Au material through the α5β3 integrin/endothelial oxide synthase (eNOS)/metalloproteinase (MMP) signaling pathway which can be abolished by the knockdown of vascular endothelial growth factor (VEGF). The potentiality of collagen+Au with MSCs for vascular regeneration was evaluated by our in vivo rat model system. Artery tissues isolated from an implanted collagen+Au-coated catheter with MSCs expressed substantial CD-31 and α-SMA, displayed higher antifibrotic ability, antithrombotic activity, as well as anti-inflammatory response than all other materials. Our results indicated that the implantation of collagen+Au-coated catheters with MSCs could be a promising strategy for vascular regeneration.
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Affiliation(s)
- Shu-Chen Hsieh
- Department of Chemistry, National Sun Yat-Sen University , Kaohsiung, Taiwan, R.O.C
- Center for Stem Cell Research, Kaohsiung Medical University , Kaohsiung, Taiwan, R.O.C
- School of Pharmacy, College of Pharmacy, Kaohsiung Medical University , Kaohsiung, Taiwan, R.O.C
| | - Hui-Jye Chen
- Graduate Institute of Basic Medical Science, China Medical University , Taichung, Taiwan, R.O.C
| | - Shan-Hui Hsu
- Institute of Polymer Science and Engineering, National Taiwan University , Taipei, Taiwan, R.O.C
- Rehabilitation Engineering Research Center, National Taiwan University , Taipei, Taiwan, R.O.C
| | - Yi-Chin Yang
- Department of Neurosurgery, Taichung Veterans General Hospital , Taichung, Taiwan, R.O.C
| | - Cheng-Ming Tang
- Institute of Oral Sciences, Chung Shan Medical University , Taichung, Taiwan, R.O.C
| | - Mei-Yun Chu
- Graduate Institute of Basic Medical Science, China Medical University , Taichung, Taiwan, R.O.C
| | - Pei-Ying Lin
- Department of Chemistry, National Sun Yat-Sen University , Kaohsiung, Taiwan, R.O.C
| | - Ru-Huei Fu
- Graduate Institute of Immunology, China Medical University , Taichung, Taiwan, R.O.C
| | - Mei-Lang Kung
- Department of Chemistry, National Sun Yat-Sen University , Kaohsiung, Taiwan, R.O.C
| | - Yun-Wen Chen
- Department of Pharmacology, National Cheng Kung University , Tainan, Taiwan, R.O.C
| | - Bi-Wen Yeh
- Department of Urology, Kaohsiung Medical University Hospital, Kaohsiung Medical University , Kaohsiung, Taiwan, R.O.C
| | - Huey-Shan Hung
- Graduate Institute of Basic Medical Science, China Medical University , Taichung, Taiwan, R.O.C
- Translational Medicine Research, China Medical University Hospital , Taichung, Taiwan, R.O.C
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Rediguieri CF, de Jesus Andreoli Pinto T, Bou-Chacra NA, Galante R, de Araújo GLB, do Nascimento Pedrosa T, Maria-Engler SS, De Bank PA. Ozone Gas as a Benign Sterilization Treatment for PLGA Nanofiber Scaffolds. Tissue Eng Part C Methods 2016; 22:338-47. [PMID: 26757850 PMCID: PMC4827278 DOI: 10.1089/ten.tec.2015.0298] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2015] [Accepted: 01/11/2016] [Indexed: 01/10/2023] Open
Abstract
The use of electrospun nanofibers for tissue engineering and regenerative medicine applications is a growing trend as they provide improved support for cell proliferation and survival due, in part, to their morphology mimicking that of the extracellular matrix. Sterilization is a critical step in the fabrication process of implantable biomaterial scaffolds for clinical use, but many of the existing methods used to date can negatively affect scaffold properties and performance. Poly(lactic-co-glycolic acid) (PLGA) has been widely used as a biodegradable polymer for 3D scaffolds and can be significantly affected by current sterilization techniques. The aim of this study was to investigate pulsed ozone gas as an alternative method for sterilizing PLGA nanofibers. The morphology, mechanical properties, physicochemical properties, and response of cells to PLGA nanofiber scaffolds were assessed following different degrees of ozone gas sterilization. This treatment killed Geobacillus stearothermophilus spores, the most common biological indicator used for validation of sterilization processes. In addition, the method preserved all of the characteristics of nonsterilized PLGA nanofibers at all degrees of sterilization tested. These findings suggest that ozone gas can be applied as an alternative method for sterilizing electrospun PLGA nanofiber scaffolds without detrimental effects.
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Affiliation(s)
- Carolina Fracalossi Rediguieri
- Departamento de Farmácia, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, São Paulo, Brasil
- Agência Nacional de Vigilância Sanitária, Brasília, Brasil
| | | | - Nadia Araci Bou-Chacra
- Departamento de Farmácia, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, São Paulo, Brasil
| | - Raquel Galante
- Departamento de Farmácia, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, São Paulo, Brasil
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
| | | | - Tatiana do Nascimento Pedrosa
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, São Paulo, Brasil
| | - Silvya Stuchi Maria-Engler
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, São Paulo, Brasil
| | - Paul A. De Bank
- Department of Pharmacy & Pharmacology and Centre for Regenerative Medicine, University of Bath, Bath, United Kingdom
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Dong C, Lv Y. Application of Collagen Scaffold in Tissue Engineering: Recent Advances and New Perspectives. Polymers (Basel) 2016; 8:polym8020042. [PMID: 30979136 PMCID: PMC6432532 DOI: 10.3390/polym8020042] [Citation(s) in RCA: 383] [Impact Index Per Article: 47.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2015] [Revised: 01/24/2016] [Accepted: 01/27/2016] [Indexed: 12/11/2022] Open
Abstract
Collagen is the main structural protein of most hard and soft tissues in animals and the human body, which plays an important role in maintaining the biological and structural integrity of the extracellular matrix (ECM) and provides physical support to tissues. Collagen can be extracted and purified from a variety of sources and offers low immunogenicity, a porous structure, good permeability, biocompatibility and biodegradability. Collagen scaffolds have been widely used in tissue engineering due to these excellent properties. However, the poor mechanical property of collagen scaffolds limits their applications to some extent. To overcome this shortcoming, collagen scaffolds can be cross-linked by chemical or physical methods or modified with natural/synthetic polymers or inorganic materials. Biochemical factors can also be introduced to the scaffold to further improve its biological activity. This review will summarize the structure and biological characteristics of collagen and introduce the preparation methods and modification strategies of collagen scaffolds. The typical application of a collagen scaffold in tissue engineering (including nerve, bone, cartilage, tendon, ligament, blood vessel and skin) will be further provided. The prospects and challenges about their future research and application will also be pointed out.
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Affiliation(s)
- Chanjuan Dong
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, Bioengineering College, Chongqing University, Chongqing 400044, China.
- Mechanobiology and Regenerative Medicine Laboratory, Bioengineering College, Chongqing University, Chongqing 400044, China.
| | - Yonggang Lv
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, Bioengineering College, Chongqing University, Chongqing 400044, China.
- Mechanobiology and Regenerative Medicine Laboratory, Bioengineering College, Chongqing University, Chongqing 400044, China.
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Corradetti B, Ferrari M. Nanotechnology for mesenchymal stem cell therapies. J Control Release 2015; 240:242-250. [PMID: 26732556 DOI: 10.1016/j.jconrel.2015.12.042] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Revised: 12/22/2015] [Accepted: 12/23/2015] [Indexed: 02/07/2023]
Abstract
Mesenchymal stem cells (MSC) display great proliferative, differentiative, chemotactic, and immune-modulatory properties required to promote tissue repair. Several clinical trials based on the use of MSC are currently underway for therapeutic purposes. The aim of this article is to examine the current trends and potential impact of nanotechnology in MSC-driven regenerative medicine. Nanoparticle-based approaches are used as powerful carrier systems for the targeted delivery of bioactive molecules to ensure MSC long-term maintenance in vitro and to enhance their regenerative potential. Nanostructured materials have been developed to recapitulate the stem cell niche within a tissue and to instruct MSC toward the creation of regeneration-permissive environment. Finally, the capability of MSC to migrate toward the site of injury/inflammation has allowed for the development of diagnostic imaging systems able to monitor transplanted stem cell bio-distribution, toxicity, and therapeutic effectiveness.
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Affiliation(s)
- Bruna Corradetti
- Department of Life and Environmental Sciences, Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy; Department of Nanomedicine, Houston Methodist Research Institute, 6670 Bertner Ave., Houston, TX 77030, USA.
| | - Mauro Ferrari
- Department of Nanomedicine, Houston Methodist Research Institute, 6670 Bertner Ave., Houston, TX 77030, USA; Department of Medicine, Weill Cornell Medical College, New York, NY 10065, USA
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Potential of Newborn and Adult Stem Cells for the Production of Vascular Constructs Using the Living Tissue Sheet Approach. BIOMED RESEARCH INTERNATIONAL 2015; 2015:168294. [PMID: 26504783 PMCID: PMC4609342 DOI: 10.1155/2015/168294] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/19/2015] [Revised: 04/23/2015] [Accepted: 04/24/2015] [Indexed: 12/19/2022]
Abstract
Bypass surgeries using native vessels rely on the availability of autologous veins and arteries. An alternative to those vessels could be tissue-engineered vascular constructs made by self-organized tissue sheets. This paper intends to evaluate the potential use of mesenchymal stem cells (MSCs) isolated from two different sources: (1) bone marrow-derived MSCs and (2) umbilical cord blood-derived MSCs. When cultured in vitro, a proportion of those cells differentiated into smooth muscle cell- (SMC-) like cells and expressed contraction associated proteins. Moreover, these cells assembled into manipulable tissue sheets when cultured in presence of ascorbic acid. Tubular vessels were then produced by rolling those tissue sheets on a mandrel. The architecture, contractility, and mechanical resistance of reconstructed vessels were compared with tissue-engineered media and adventitia produced from SMCs and dermal fibroblasts, respectively. Histology revealed a collagenous extracellular matrix and the contractile responses measured for these vessels were stronger than dermal fibroblasts derived constructs although weaker than SMCs-derived constructs. The burst pressure of bone marrow-derived vessels was higher than SMCs-derived ones. These results reinforce the versatility of the self-organization approach since they demonstrate that it is possible to recapitulate a contractile media layer from MSCs without the need of exogenous scaffolding material.
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Lowenthal J, Gerecht S. Stem cell-derived vasculature: A potent and multidimensional technology for basic research, disease modeling, and tissue engineering. Biochem Biophys Res Commun 2015; 473:733-42. [PMID: 26427871 DOI: 10.1016/j.bbrc.2015.09.127] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Accepted: 09/23/2015] [Indexed: 02/08/2023]
Abstract
Proper blood vessel networks are necessary for constructing and re-constructing tissues, promoting wound healing, and delivering metabolic necessities throughout the body. Conversely, an understanding of vascular dysfunction has provided insight into the pathogenesis and progression of diseases both common and rare. Recent advances in stem cell-based regenerative medicine - including advances in stem cell technologies and related progress in bioscaffold design and complex tissue engineering - have allowed rapid advances in the field of vascular biology, leading in turn to more advanced modeling of vascular pathophysiology and improved engineering of vascularized tissue constructs. In this review we examine recent advances in the field of stem cell-derived vasculature, providing an overview of stem cell technologies as a source for vascular cell types and then focusing on their use in three primary areas: studies of vascular development and angiogenesis, improved disease modeling, and the engineering of vascularized constructs for tissue-level modeling and cell-based therapies.
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Affiliation(s)
- Justin Lowenthal
- Medical Scientist Training Program, School of Medicine, Johns Hopkins University, Baltimore, MD, United States; Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD, United States
| | - Sharon Gerecht
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD, United States; Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD, United States; Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, MD, United States.
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Piezoelectric materials for tissue regeneration: A review. Acta Biomater 2015; 24:12-23. [PMID: 26162587 DOI: 10.1016/j.actbio.2015.07.010] [Citation(s) in RCA: 239] [Impact Index Per Article: 26.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2015] [Revised: 06/11/2015] [Accepted: 07/06/2015] [Indexed: 02/06/2023]
Abstract
The discovery of piezoelectricity, endogenous electric fields and transmembrane potentials in biological tissues raised the question whether or not electric fields play an important role in cell function. It has kindled research and the development of technologies in emulating biological electricity for tissue regeneration. Promising effects of electrical stimulation on cell growth and differentiation and tissue growth has led to interest in using piezoelectric scaffolds for tissue repair. Piezoelectric materials can generate electrical activity when deformed. Hence, an external source to apply electrical stimulation or implantation of electrodes is not needed. Various piezoelectric materials have been employed for different tissue repair applications, particularly in bone repair, where charges induced by mechanical stress can enhance bone formation; and in neural tissue engineering, in which electric pulses can stimulate neurite directional outgrowth to fill gaps in nervous tissue injuries. In this review, a summary of piezoelectricity in different biological tissues, mechanisms through which electrical stimulation may affect cellular response, and recent advances in the fabrication and application of piezoelectric scaffolds will be discussed. STATEMENT OF SIGNIFICANCE The discovery of piezoelectricity, endogenous electric fields and transmembrane potentials in biological tissues has kindled research and the development of technologies using electrical stimulation for tissue regeneration. Piezoelectric materials generate electrical activity in response to deformations and allow for the delivery of an electrical stimulus without the need for an external power source. As a scaffold for tissue engineering, growing interest exists due to its potential of providing electrical stimulation to cells to promote tissue formation. In this review, we cover the discovery of piezoelectricity in biological tissues, its connection to streaming potentials, biological response to electrical stimulation and commonly used piezoelectric materials for tissue regeneration. This review summarizes their potential as a promising scaffold in the tissue engineering field.
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Tresoldi C, Pellegata AF, Mantero S. Cells and stimuli in small-caliber blood vessel tissue engineering. Regen Med 2015; 10:505-27. [DOI: 10.2217/rme.15.19] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
The absence of successful solutions in treatments of small-caliber vessel diseases led to the Vascular Tissue Engineering approach to develop functional nonimmunogenic tissue engineered blood vessels. In this context, the choice of cells to be seeded and the microenvironment conditioning are pivotal. Biochemical and biomechanical stimuli seem to activate physiological regulatory pathways that induce the production of molecules and proteins stimulating stem cell differentiation toward vascular lineage and reproducing natural cross-talks among vascular cells to improve the maturation of tissue engineered blood vessels. Thus, this review focuses on (1) available cell sources, and (2) biochemical and biomechanical stimuli, with the final aim to obtain the long-term stability of the endothelium and mechanical properties suitable for withstanding physiological load.
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Affiliation(s)
- Claudia Tresoldi
- Department of Chemistry, Materials & Chemical Engineering “Giulio Natta”, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133, Milan, Italy
| | - Alessandro Filippo Pellegata
- Department of Chemistry, Materials & Chemical Engineering “Giulio Natta”, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133, Milan, Italy
| | - Sara Mantero
- Department of Chemistry, Materials & Chemical Engineering “Giulio Natta”, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133, Milan, Italy
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Xiong Y, He J, Zhang W, Zhou G, Cao Y, Liu W. Retention of the stemness of mouse adipose-derived stem cells by their expansion on human bone marrow stromal cell-derived extracellular matrix. Tissue Eng Part A 2015; 21:1886-94. [PMID: 25836590 DOI: 10.1089/ten.tea.2014.0539] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Mesenchymal stem cells (MSCs) usually lose their stemness during in vitro expansion as they are deprived of their niche environment. Cell-extracellular matrix (ECM) interaction is known to play important roles in preserving the stemness of the cells in their stem cell niche environment. Previously, coating with bone marrow MSC (BMSC)-derived ECM was found able to maintain the differentiation potential of in vitro cultured MSCs. This study aimed to determine if this ECM coating could also maintain the stemness of cultured murine adipose-derived stem cells (ASCs) using a regular culture flask as a control. Cells were expanded in ECM-coated and ECM-noncoated flasks for two and four passages and then harvested for various analyses. The results showed that ASCs exhibited fibroblast-like spindle morphology in ECM-coated flasks, whereas ASCs gradually spread and enlarged in the ECM-noncoated flasks. After three and five passages, both groups of cells exhibited similar cytokinetics in the MSC culture medium (MesenPRO RS™ Medium). However, when cultured in Dulbecco's modified Eagles medium (DMEM) plus 10% fetal bovine serum, coating group cells exhibited more potent proliferation than control group cells with a significant difference in both passages 3 and 5 (p<0.01). When seeded at low density (500 cells/10-cm dish), coating group cells formed significantly more and larger sized cell colonies than control group cells with significant difference in cell colony numbers between two groups (p<0.05). In addition, coated colony cells were much smaller and more compactly arranged compared to control colony cells. Furthermore, ASCs expanded in coated flasks exhibited greater potentials for adipogenic, osteogenic, and chondrogenic differentiations than the cells expanded in regular flasks. Quantitatively, the Oil Red O staining area, Alizarin staining area, and Toluidine Blue staining area were all significantly larger than the respective staining areas of control cells (p<0.05). Real-time polymerase chain reaction also revealed significantly higher gene expression levels of peroxisome proliferator-activated receptor gamma (PPARγ), adipocyte protein 2 (aP2), CCAAT/enhancer-binding protein (C/EBP), Runx2, osteocalcin, Sox9, collagen II, and aggrecan in ECM-coated group cells than in control group cells (p<0.05). Collectively, these results suggest that human BMSC decellular ECM coating helps to preserve the stemness of cultured murine ASCs.
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Affiliation(s)
- Yao Xiong
- 1Department of Plastic and Reconstructive Surgery, Shanghai Key Laboratory of Tissue Engineering, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Jing He
- 2Department of Anatomy and Neurobiology, Tongji University School of Medicine, Shanghai, People's Republic of China
| | - Wenjie Zhang
- 1Department of Plastic and Reconstructive Surgery, Shanghai Key Laboratory of Tissue Engineering, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China.,3National Tissue Engineering Center of China, Shanghai, People's Republic of China
| | - Guangdong Zhou
- 1Department of Plastic and Reconstructive Surgery, Shanghai Key Laboratory of Tissue Engineering, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China.,3National Tissue Engineering Center of China, Shanghai, People's Republic of China
| | - Yilin Cao
- 1Department of Plastic and Reconstructive Surgery, Shanghai Key Laboratory of Tissue Engineering, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China.,3National Tissue Engineering Center of China, Shanghai, People's Republic of China
| | - Wei Liu
- 1Department of Plastic and Reconstructive Surgery, Shanghai Key Laboratory of Tissue Engineering, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China.,3National Tissue Engineering Center of China, Shanghai, People's Republic of China
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Dumitriu C, Stoian AB, Titorencu I, Pruna V, Jinga VV, Latonen RM, Bobacka J, Demetrescu I. Electrospun TiO2 nanofibers decorated Ti substrate for biomedical application. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 45:56-63. [DOI: 10.1016/j.msec.2014.08.055] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Revised: 07/22/2014] [Accepted: 08/29/2014] [Indexed: 12/17/2022]
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Biomimetic modified clinical-grade POSS-PCU nanocomposite polymer for bypass graft applications: a preliminary assessment of endothelial cell adhesion and haemocompatibility. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 46:400-8. [PMID: 25492004 DOI: 10.1016/j.msec.2014.10.065] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Revised: 09/25/2014] [Accepted: 10/21/2014] [Indexed: 01/26/2023]
Abstract
BACKGROUND To date, there are no small internal diameter (<5mm) vascular grafts that are FDA approved for clinical use due to high failure rates from thrombosis and unwanted cell proliferation. The ideal conditions to enhance bioengineered grafts would be the blood contacting lumen of the bypass graft fully covered by endothelial cells (ECs). As a strategy towards this aim, we hypothesized that by immobilising biomolecules on the surface of the polyhedral oligomeric silsesquioxane-poly(carbonate-urea)urethane (POSS-PCU) nanocomposite polymers, which contain binding sites and ligands for cell surface receptors similar to extracellular matrix (ECM) will positively influence the attachment and proliferation of ECs. Since, the surface of POSS-PCU is inert and not directly suitable for immobilisation of biomolecules, plasma graft polymerisation is a suitable method to modify the surface properties ready for immobilisation and biofunctionalisation. METHODS POSS-PCU was activated by plasma treatment in air/O2 to from hydroperoxides (-OH, -OOH), and then carboxylated via plasma polymerisation of a 30% acrylic acid solution (Poly-AA) using a two-step plasma treatment (TSPT) process. Collagen type I, a major component of ECM, was covalently immobilised to mimic the ECM structures to ECs (5mg/ml) using a two-step chemical reaction using EDC chemistry. Successful immobilisation of poly-AA and collagen on to the nanocomposites was confirmed using Toluidine Blue staining and the Bradford assay. Un-treated POSS-PCU served as a simple control. The impact of collagen grafting on the physical, mechanical and biological properties of POSS-PCU was evaluated via contact angle (θ) measurements, scanning electron microscopy (SEM), atomic force microscopy (AFM), dynamic mechanical thermal analysis (DMTA), ECs adhesion and proliferation followed by platelet adhesion and haemolysis ratio (HR) tests. RESULTS Poly-AA content on each of the plasma treated nanocomposite films increased on Low, Med and High samples due to more carboxylic acid (-COOH) groups at the surface forming amide (-NH2) bonds. The amount of -COOH groups on each of the Low, Med and High nanocomposites correlated with Poly-AA grafting density at 14.7±0.9, 18.9±0.9, and 34.2±2.4 μg/cm(2). Immobilisation of collagen type I on to nanocomposite surface was also found to increase significantly on the Low, Med and High samples from 22±4, 150±15, and 219±17 μg/cm(2), respectively. The level of ECs and their adhesion efficiency were improved with increasing amounts of grafted collagen I. The maximum adhesion of ECs was found on the highest collagen type I coated nanocomposites. Platelet adhesion and activation also increased with increasing collagen density. The obtained HR values for all of the treated samples were well within the acceptable standards for biomaterials (<5% HR). CONCLUSION Poly-AA-g-POSS-PCU surfaces offer binding sites for the covalent bonding of collagen type I and other biomolecules such as fibronectin by exposure of RGD cell binding domains and growth factors using EDC cross-linking chemistry. Collagen type I modification can yield accelerated EC growth and enhance the endothelialisation of POSS-PCU nanocomposites, and the amount of immobilised collagen can control the level of platelet adhesion on functionalized POSS-PCU via TSPT and poly acrylic acid (poly-AA) treatment. Such surface modification procedures of polymeric surfaces can improve the patency rate of POSS-PCU nanocomposites as vascular bypass grafts in the preparation of a range of medical devices ready for pre-clinical and in vivo evaluation.
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Hofmann MC. Stem cells and nanomaterials. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2014; 811:255-75. [PMID: 24683036 DOI: 10.1007/978-94-017-8739-0_13] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Because of their ability to self-renew and differentiate into many cell types, stem cells offer the potential to be used for tissue regeneration and engineering. Much progress has recently been made in our understanding of the biology of stem cells and our ability to manipulate their proliferation and differentiation to obtain functional tissues. Similarly, nanomaterials have been recently developed that will accelerate discovery of mechanisms driving stem cell fate and their utilization in medicine. Nanoparticles have been developed that allow the labeling and tracking of stem cells and their differentiated phenotype within an organism. Nanosurfaces are engineered that mimic the extracellular matrix to which stem cells adhere and migrate. Scaffolds made of functionalized nanofibers can now be used to grow stem cells and regenerate damaged tissues and organs. However, the small scale of nanomaterials induces changes in their chemical and physical properties that might modify their interactions with cells and tissues, and render them toxic to stem cells. Therefore a thorough understanding of stem cell-nanomaterial interactions is still necessary not only to accelerate the success of medical treatments but also to ensure the safety of the tools provided by these novel technologies.
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Affiliation(s)
- Marie-Claude Hofmann
- Department of Endocrine Neoplasia and Hormonal Disorders, University of Texas MD Anderson Cancer Center, Houston, TX, USA,
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37
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Perestrelo AR, Grenha A, Rosa da Costa AM, Belo JA. Locust bean gum as an alternative polymeric coating for embryonic stem cell culture. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 40:336-44. [PMID: 24857501 DOI: 10.1016/j.msec.2014.04.022] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2013] [Revised: 03/05/2014] [Accepted: 04/07/2014] [Indexed: 12/18/2022]
Abstract
Pluripotent embryonic stem cells (ESCs) have self-renewal capacity and the potential to differentiate into any cellular type depending on specific cues (pluripotency) and, therefore, have become a vibrant research area in the biomedical field. ESCs are usually cultured in gelatin or on top of a monolayer of feeder cells such as mitotically inactivated mouse embryonic fibroblasts (MEFsi). The latter is the gold standard support to maintain the ESCs in the pluripotent state. Examples of versatile, non-animal derived and inexpensive materials that are able to support pluripotent ESCs are limited. Therefore, our aim was to find a biomaterial able to support ESC growth in a pluripotent state avoiding laborious and time consuming parallel culture of MEFsi and as simple to handle as gelatin. Many of the new biomaterials used to develop stem cell microenvironments are using natural polymers adsorbed or covalently attached to the surface to improve the biocompatibility of synthetic polymers. Locust beam gum (LBG) is a natural, edible polymer, which has a wide range of potential applications in different fields, such as food and pharmaceutical industry, due to its biocompatibility, adhesiveness and thickening properties. The present work brings a natural system based on the use of LBG as a coating for ESC culture. Undifferentiated mouse ESCs were cultured on commercially available LBG to evaluate its potential in maintaining pluripotent ESCs. In terms of morphology, ESC colonies in LBG presented the regular dome shape with bright borders, similar to the colonies obtained in co-cultures with MEFsi and characteristic of pluripotent ESC colonies. In short-term cultures, ESC proliferation in LBG coating was similar to ESC cultured in gelatin and the cells maintained their viability. The activity of alkaline phosphatase and Nanog, Sox2 and Oct4 expression of mouse ESCs cultured in LBG were comparable or in some cases higher than in ESCs cultured in gelatin. An in vitro differentiation assay revealed that mouse ESCs cultured in LBG preserve their tri-lineage differentiation capacity. In conclusion, our data indicate that LBG coating promotes mouse ESC growth in an undifferentiated state demonstrating to be a viable, non-animal derived alternative to gelatin to support pluripotent mouse ESCs in culture.
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Affiliation(s)
- Ana Rubina Perestrelo
- Regenerative Medicine Program, Departamento de Ciências Biomédicas e Medicina, Universidade do Algarve, Portugal; IBB - Institute for Biotechnology and Bioengineering, Centre for Molecular and Structural Biomedicine (CBME), Universidade do Algarve, Portugal; PhD Program in Biomedical Sciences, Universidade do Algarve, Portugal
| | - Ana Grenha
- IBB - Institute for Biotechnology and Bioengineering, Centre for Molecular and Structural Biomedicine (CBME), Universidade do Algarve, Portugal
| | - Ana M Rosa da Costa
- Centro de Investigação em Química do Algarve (CIQA) & Departamento de Química e Farmácia, Faculdade de Ciências e Tecnologia, Universidade do Algarve, Portugal
| | - José António Belo
- Regenerative Medicine Program, Departamento de Ciências Biomédicas e Medicina, Universidade do Algarve, Portugal; IBB - Institute for Biotechnology and Bioengineering, Centre for Molecular and Structural Biomedicine (CBME), Universidade do Algarve, Portugal; Faculdade de Ciências Médicas, Universidade Nova de Lisboa, Campo Mártires da Pátria 130, 1169-056 Lisboa, Portugal.
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Jia L, Prabhakaran MP, Qin X, Ramakrishna S. Guiding the orientation of smooth muscle cells on random and aligned polyurethane/collagen nanofibers. J Biomater Appl 2014; 29:364-77. [DOI: 10.1177/0885328214529002] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Fabricating scaffolds that can simulate the architecture and functionality of native extracellular matrix is a huge challenge in vascular tissue engineering. Various kinds of materials are engineered via nano-technological approaches to meet the current challenges in vascular tissue regeneration. During this study, nanofibers from pure polyurethane and hybrid polyurethane/collagen in two different morphologies (random and aligned) and in three different ratios of polyurethane:collagen (75:25; 50:50; 25:75) are fabricated by electrospinning. The fiber diameters of the nanofibrous scaffolds are in the range of 174–453 nm and 145–419 for random and aligned fibers, respectively, where they closely mimic the nanoscale dimensions of native extracellular matrix. The aligned polyurethane/collagen nanofibers expressed anisotropic wettability with mechanical properties which is suitable for regeneration of the artery. After 12 days of human aortic smooth muscle cells culture on different scaffolds, the proliferation of smooth muscle cells on hybrid polyurethane/collagen (3:1) nanofibers was 173% and 212% higher than on pure polyurethane scaffolds for random and aligned scaffolds, respectively. The results of cell morphology and protein staining showed that the aligned polyurethane/collagen (3:1) scaffold promote smooth muscle cells alignment through contact guidance, while the random polyurethane/collagen (3:1) also guided cell orientation most probably due to the inherent biochemical composition. Our studies demonstrate the potential of aligned and random polyurethane/collagen (3:1) as promising substrates for vascular tissue regeneration.
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Affiliation(s)
- Lin Jia
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai, China
- Collagen of Textiles, Henan Institute of Engineering, Zhengzhou, Henan, China
- Center for Nanofibers and Nanotechnology, Nanoscience and Nanotechnology Initiative, Faculty of Engineering, National University of Singapore, Singapore
| | - Molamma P Prabhakaran
- Center for Nanofibers and Nanotechnology, Nanoscience and Nanotechnology Initiative, Faculty of Engineering, National University of Singapore, Singapore
| | - Xiaohong Qin
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai, China
| | - Seeram Ramakrishna
- Center for Nanofibers and Nanotechnology, Nanoscience and Nanotechnology Initiative, Faculty of Engineering, National University of Singapore, Singapore
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Abstract
With the high occurrence of cardiovascular disease and increasing numbers of patients requiring vascular access, there is a significant need for small-diameter (<6 mm inner diameter) vascular graft that can provide long-term patency. Despite the technological improvements, restenosis and graft thrombosis continue to hamper the success of the implants. Vascular tissue engineering is a new field that has undergone enormous growth over the last decade and has proposed valid solutions for blood vessels repair. The goal of vascular tissue engineering is to produce neovessels and neoorgan tissue from autologous cells using a biodegradable polymer as a scaffold. The most important advantage of tissue-engineered implants is that these tissues can grow, remodel, rebuild, and respond to injury. This review describes the development of polymeric materials over the years and current tissue engineering strategies for the improvement of vascular conduits.
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