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Burke JA, Zhu Y, Zhang X, Rios PD, Joshi I, Lopez D, Nasir H, Roberts S, Rodriguez Q, McGarrigle J, Cook D, Oberholzer J, Luo X, Ameer GA. Phase-changing citrate macromolecule combats oxidative pancreatic islet damage, enables islet engraftment and function in the omentum. SCIENCE ADVANCES 2024; 10:eadk3081. [PMID: 38848367 PMCID: PMC11160476 DOI: 10.1126/sciadv.adk3081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Accepted: 05/03/2024] [Indexed: 06/09/2024]
Abstract
Clinical outcomes for total-pancreatectomy followed by intraportal islet autotransplantation (TP-IAT) to treat chronic pancreatitis (CP) are suboptimal due to pancreas inflammation, oxidative stress during islet isolation, and harsh engraftment conditions in the liver's vasculature. We describe a thermoresponsive, antioxidant macromolecule poly(polyethylene glycol citrate-co-N-isopropylacrylamide) (PPCN) to protect islet redox status and function and to enable extrahepatic omentum islet engraftment. PPCN solution transitions from a liquid to a hydrogel at body temperature. Islets entrapped in PPCN and exposed to oxidative stress remain functional and support long-term euglycemia, in contrast to islets entrapped in a plasma-thrombin biologic scaffold. In the nonhuman primate (NHP) omentum, PPCN is well-tolerated and mostly resorbed without fibrosis at 3 months after implantation. In NHPs, autologous omentum islet transplantation using PPCN restores normoglycemia with minimal exogenous insulin requirements for >100 days. This preclinical study supports TP-IAT with PPCN in patients with CP and highlights antioxidant properties as a mechanism for islet function preservation.
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Affiliation(s)
- Jacqueline A. Burke
- Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, USA
- Center for Advanced Regenerative Engineering, Northwestern University, Evanston, IL 60208, USA
| | - Yunxiao Zhu
- Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, USA
- Center for Advanced Regenerative Engineering, Northwestern University, Evanston, IL 60208, USA
| | - Xiaomin Zhang
- Center for Advanced Regenerative Engineering, Northwestern University, Evanston, IL 60208, USA
- Department of Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | | | - Ira Joshi
- CellTrans Inc., Chicago, IL 60612, USA
| | | | | | | | | | | | | | | | - Xunrong Luo
- Duke Transplant Center, Duke University School of Medicine, Durham, NC 27710, USA
| | - Guillermo A. Ameer
- Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, USA
- Center for Advanced Regenerative Engineering, Northwestern University, Evanston, IL 60208, USA
- Department of Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
- Chemistry of Life Processes Institute, Northwestern University, Evanston, IL 60208 USA
- Simpson Querrey Institute, Northwestern University, Chicago, IL 60611, USA
- International Institute for Nanotechnology, Northwestern University, Evanston, IL 60208, USA
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2
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Golebiowska AA, Intravaia JT, Sathe VM, Kumbar SG, Nukavarapu SP. Decellularized extracellular matrix biomaterials for regenerative therapies: Advances, challenges and clinical prospects. Bioact Mater 2024; 32:98-123. [PMID: 37927899 PMCID: PMC10622743 DOI: 10.1016/j.bioactmat.2023.09.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 09/21/2023] [Accepted: 09/25/2023] [Indexed: 11/07/2023] Open
Abstract
Tissue engineering and regenerative medicine have shown potential in the repair and regeneration of tissues and organs via the use of engineered biomaterials and scaffolds. However, current constructs face limitations in replicating the intricate native microenvironment and achieving optimal regenerative capacity and functional recovery. To address these challenges, the utilization of decellularized tissues and cell-derived extracellular matrix (ECM) has emerged as a promising approach. These biocompatible and bioactive biomaterials can be engineered into porous scaffolds and grafts that mimic the structural and compositional aspects of the native tissue or organ microenvironment, both in vitro and in vivo. Bioactive dECM materials provide a unique tissue-specific microenvironment that can regulate and guide cellular processes, thereby enhancing regenerative therapies. In this review, we explore the emerging frontiers of decellularized tissue-derived and cell-derived biomaterials and bio-inks in the field of tissue engineering and regenerative medicine. We discuss the need for further improvements in decellularization methods and techniques to retain structural, biological, and physicochemical characteristics of the dECM products in a way to mimic native tissues and organs. This article underscores the potential of dECM biomaterials to stimulate in situ tissue repair through chemotactic effects for the development of growth factor and cell-free tissue engineering strategies. The article also identifies the challenges and opportunities in developing sterilization and preservation methods applicable for decellularized biomaterials and grafts and their translation into clinical products.
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Affiliation(s)
| | - Jonathon T. Intravaia
- Department of Biomedical Engineering, University of Connecticut, Storrs, CT, 06269, USA
| | - Vinayak M. Sathe
- Department of Orthopaedic Surgery, University of Connecticut Health, Farmington, CT, 06032, USA
| | - Sangamesh G. Kumbar
- Department of Biomedical Engineering, University of Connecticut, Storrs, CT, 06269, USA
- Department of Materials Science & Engineering, University of Connecticut, Storrs, CT, 06269, USA
- Department of Orthopaedic Surgery, University of Connecticut Health, Farmington, CT, 06032, USA
| | - Syam P. Nukavarapu
- Department of Biomedical Engineering, University of Connecticut, Storrs, CT, 06269, USA
- Department of Materials Science & Engineering, University of Connecticut, Storrs, CT, 06269, USA
- Department of Orthopaedic Surgery, University of Connecticut Health, Farmington, CT, 06032, USA
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Wang H, Huddleston S, Yang J, Ameer GA. Enabling Proregenerative Medical Devices via Citrate-Based Biomaterials: Transitioning from Inert to Regenerative Biomaterials. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2306326. [PMID: 38043945 DOI: 10.1002/adma.202306326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 10/03/2023] [Indexed: 12/05/2023]
Abstract
Regenerative medicine aims to restore tissue and organ function without the use of prosthetics and permanent implants. However, achieving this goal has been elusive, and the field remains mostly an academic discipline with few products widely used in clinical practice. From a materials science perspective, barriers include the lack of proregenerative biomaterials, a complex regulatory process to demonstrate safety and efficacy, and user adoption challenges. Although biomaterials, particularly biodegradable polymers, can play a major role in regenerative medicine, their suboptimal mechanical and degradation properties often limit their use, and they do not support inherent biological processes that facilitate tissue regeneration. As of 2020, nine synthetic biodegradable polymers used in medical devices are cleared or approved for use in the United States of America. Despite the limitations in the design, production, and marketing of these devices, this small number of biodegradable polymers has dominated the resorbable medical device market for the past 50 years. This perspective will review the history and applications of biodegradable polymers used in medical devices, highlight the need and requirements for regenerative biomaterials, and discuss the path behind the recent successful introduction of citrate-based biomaterials for manufacturing innovative medical products aimed at improving the outcome of musculoskeletal surgeries.
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Affiliation(s)
- Huifeng Wang
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
- Center for Advanced Regenerative Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Samantha Huddleston
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
- Center for Advanced Regenerative Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Jian Yang
- Biomedical Engineering Program, School of Engineering, Westlake University, Hangzhou, Zhejiang, 310030, China
- Research Center for Industries of the Future, Westlake University, Hangzhou, Zhejiang, 310030, China
| | - Guillermo A Ameer
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
- Center for Advanced Regenerative Engineering, Northwestern University, Evanston, IL, 60208, USA
- Department of Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA
- Chemistry of Life Processes Institute, Northwestern University, Evanston, IL, 60208, USA
- Simpson Querrey Institute, Northwestern University, Chicago, IL, 60611, USA
- International Institute for Nanotechnology, Northwestern University, Evanston, IL, 60208, USA
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Li J, Zhang J, Ye H, Wang Q, Ouyang Y, Luo Y, Gong Y. Pulmonary decellularized extracellular matrix (dECM) modified polyethylene terephthalate three-dimensional cell carriers regulate the proliferation and paracrine activity of mesenchymal stem cells. Front Bioeng Biotechnol 2024; 11:1324424. [PMID: 38260733 PMCID: PMC10800494 DOI: 10.3389/fbioe.2023.1324424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Accepted: 12/07/2023] [Indexed: 01/24/2024] Open
Abstract
Introduction: Mesenchymal stem cells (MSCs) possess a high degree of self-renewal capacity and in vitro multi-lineage differentiation potential. Decellularized materials have garnered considerable attention due to their elevated biocompatibility, reduced immunogenicity, excellent biodegradability, and the ability to partially mimic the in vivo microenvironment conducive to cell growth. To address the issue of mesenchymal stem cells losing their stem cell characteristics during two-dimensional (2D) cultivation, this study established three-dimensional cell carriers modified with lung decellularized extracellular matrix and assessed its impact on the life activities of mesenchymal stem cells. Methods: This study employed PET as a substrate material, grafting with polydopamine (PDA), and constructing a decellularized extracellular matrix (dECM) coating on its surface, thus creating the PET/PDA/dECM three-dimensional (3D) composite carrier. Subsequently, material characterization of the cellular carriers was conducted, followed by co-culturing with human umbilical cord mesenchymal stem cells in vitro, aiming to investigate the material's impact on the proliferation and paracrine activity of mesenchymal stem cells. Results and Discussion: Material characterization demonstrated successful grafting of PDA and dECM materials, and it had complete hydrophilicity, high porosity, and excellent mechanical properties. The material was rich in various ECM proteins (collagen I, collagen IV , laminin, fibronectin, elastin), indicating good biocompatibility. In long-term in vitro cultivation (14 days) experiments, the PET/PDA/dECM three-dimensional composite carrier significantly enhanced adhesion and proliferation of human umbilical cord-derived mesenchymal stem cells (HUCMSCs), with a proliferation rate 1.9 times higher than that of cells cultured on tissue culture polystyrene (TCPS) at day 14. Furthermore, it effectively maintained the stem cell characteristics, expressing specific antigens for HUCMSCs. Through qPCR, Western blot, and ELISA experiments, the composite carrier markedly promoted the expression and secretion of key cell factors in HUCMSCs. These results demonstrate that the PET/PDA/dECM composite carrier holds great potential for scaling up MSCs' long-term in vitro cultivation and the production of paracrine factors.
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Affiliation(s)
- Jinze Li
- School of Biomedical Engineering, Shenzhen Campus of Sun Yat-Sen University, Shenzhen, China
| | - Jiali Zhang
- School of Biomedical Engineering, Shenzhen Campus of Sun Yat-Sen University, Shenzhen, China
| | - Hao Ye
- School of Biomedical Engineering, Shenzhen Campus of Sun Yat-Sen University, Shenzhen, China
| | - Qixuan Wang
- School of Biomedical Engineering, Shenzhen Campus of Sun Yat-Sen University, Shenzhen, China
| | - Yanran Ouyang
- School of Biomedical Engineering, Shenzhen Campus of Sun Yat-Sen University, Shenzhen, China
| | - Yuxi Luo
- School of Biomedical Engineering, Shenzhen Campus of Sun Yat-Sen University, Shenzhen, China
- Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instrument, Sun Yat-Sen University, Guangzhou, China
| | - Yihong Gong
- School of Biomedical Engineering, Shenzhen Campus of Sun Yat-Sen University, Shenzhen, China
- Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instrument, Sun Yat-Sen University, Guangzhou, China
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Li J, Chen X, Hu M, Wei J, Nie M, Chen J, Liu X. The application of composite scaffold materials based on decellularized vascular matrix in tissue engineering: a review. Biomed Eng Online 2023; 22:62. [PMID: 37337190 DOI: 10.1186/s12938-023-01120-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Accepted: 05/28/2023] [Indexed: 06/21/2023] Open
Abstract
Decellularized vascular matrix is a natural polymeric biomaterial that comes from arteries or veins which are removed the cellular contents by physical, chemical and enzymatic means, leaving only the cytoskeletal structure and extracellular matrix to achieve cell adhesion, proliferation and differentiation and creating a suitable microenvironment for their growth. In recent years, the decellularized vascular matrix has attracted much attention in the field of tissue repair and regenerative medicine due to its remarkable cytocompatibility, biodegradability and ability to induce tissue regeneration. Firstly, this review introduces its basic properties and preparation methods; then, it focuses on the application and research of composite scaffold materials based on decellularized vascular matrix in vascular tissue engineering in terms of current in vitro and in vivo studies, and briefly outlines its applications in other tissue engineering fields; finally, it looks into the advantages and drawbacks to be overcome in the application of decellularized vascular matrix materials. In conclusion, as a new bioactive material for building engineered tissue and repairing tissue defects, decellularized vascular matrix will be widely applied in prospect.
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Affiliation(s)
- Jingying Li
- Department of Periodontics & Oral Mucosal Diseases, The Affiliated Stomatology Hospital of Southwest Medical University, Luzhuo, 646000, China
- Oral & Maxillofacial Reconstruction and Regeneration of Luzhou Key Laboratory, Luzhou, 646000, China
| | - Xiao Chen
- Department of Stomatology Technology, School of Medical Technology, Sichuan College of Traditional Medicine, Mianyang, 621000, China
- Department of Orthodontics, Mianyang Stomatological Hospital, Mianyang, 621000, China
| | - Miaoling Hu
- Department of Periodontics & Oral Mucosal Diseases, The Affiliated Stomatology Hospital of Southwest Medical University, Luzhuo, 646000, China
- Oral & Maxillofacial Reconstruction and Regeneration of Luzhou Key Laboratory, Luzhou, 646000, China
| | - Jian Wei
- Department of Periodontics & Oral Mucosal Diseases, The Affiliated Stomatology Hospital of Southwest Medical University, Luzhuo, 646000, China
- Oral & Maxillofacial Reconstruction and Regeneration of Luzhou Key Laboratory, Luzhou, 646000, China
| | - Minhai Nie
- Department of Periodontics & Oral Mucosal Diseases, The Affiliated Stomatology Hospital of Southwest Medical University, Luzhuo, 646000, China
- Oral & Maxillofacial Reconstruction and Regeneration of Luzhou Key Laboratory, Luzhou, 646000, China
| | - Jiana Chen
- Department of Periodontics & Oral Mucosal Diseases, The Affiliated Stomatology Hospital of Southwest Medical University, Luzhuo, 646000, China
- Oral & Maxillofacial Reconstruction and Regeneration of Luzhou Key Laboratory, Luzhou, 646000, China
| | - Xuqian Liu
- Department of Periodontics & Oral Mucosal Diseases, The Affiliated Stomatology Hospital of Southwest Medical University, Luzhuo, 646000, China.
- Oral & Maxillofacial Reconstruction and Regeneration of Luzhou Key Laboratory, Luzhou, 646000, China.
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de Oliveira MF, da Silva LCE, Catori DM, Lorevice MV, Galvão KEA, Millás ALG, de Oliveira MG. Photocurable Nitric Oxide-Releasing Copolyester for the 3D Printing of Bioresorbable Vascular Stents. Macromol Biosci 2023; 23:e2200448. [PMID: 36519642 DOI: 10.1002/mabi.202200448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 11/30/2022] [Indexed: 12/23/2022]
Abstract
The design of bioresorbable vascular stents (BVS) capable of releasing nitric oxide (NO) at the implant site may enable BVS to mimic the antiplatelet, antiproliferative, and pro-endothelial actions of NO, overcoming complications of BVS such as late thrombosis and restenosis. In this study, the fabrication of BVS composed of methacrylated poly(dodecanediol citrate-co-dodecanediol S-nitroso-mercaptosuccinate) (mP(DC-co-DMSNO)), a novel elastomeric, bioabsorbable, and photocurable copolyester, containing covalently bound S-nitrosothiol groups in the carbon backbone of the polymer, is reported. The mP(DC-co-DMSNO) stents are manufactured via photoinduced 3D printing and allow deployment via a self-expansion process from a balloon catheter. After deployment, hydration of the stents triggers the release of NO, which is maintained during the slow hydrolysis of the polymer. Real-time NO release measurements show that by varying the copolyester composition and the strut geometry of the mP(DC-co-DMSNO) stents, it is possible to modulate their NO release rate in the range of 30-52 pmol min-1 cm-2 . Preliminary biological assays in cell culture show that endothelial cells adhere to the surface of the stents and that NO release favors their endothelization. Thus, mP(DC-co-DMSNO) may emerge as a new platform for the fabrication of advanced BVS.
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Affiliation(s)
- Matheus F de Oliveira
- Institute of Chemistry, University of Campinas, UNICAMP, Rua Josué de Castro, s/n, CP 6154, Campinas, SP, 13083-970, Brazil
| | - Laura C E da Silva
- Institute of Chemistry, University of Campinas, UNICAMP, Rua Josué de Castro, s/n, CP 6154, Campinas, SP, 13083-970, Brazil
| | - Daniele M Catori
- Institute of Chemistry, University of Campinas, UNICAMP, Rua Josué de Castro, s/n, CP 6154, Campinas, SP, 13083-970, Brazil
| | - Marcos V Lorevice
- Institute of Chemistry, University of Campinas, UNICAMP, Rua Josué de Castro, s/n, CP 6154, Campinas, SP, 13083-970, Brazil
| | - Karen E A Galvão
- 3D Biotechnology Solutions, 3DBS, Rua da Abolição, 1880, Campinas, SP, 13041-445, Brazil
| | - Ana L G Millás
- 3D Biotechnology Solutions, 3DBS, Rua da Abolição, 1880, Campinas, SP, 13041-445, Brazil
| | - Marcelo G de Oliveira
- Institute of Chemistry, University of Campinas, UNICAMP, Rua Josué de Castro, s/n, CP 6154, Campinas, SP, 13083-970, Brazil
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Wang M, Xu P, Lei B. Engineering multifunctional bioactive citrate-based biomaterials for tissue engineering. Bioact Mater 2023; 19:511-537. [PMID: 35600971 PMCID: PMC9096270 DOI: 10.1016/j.bioactmat.2022.04.027] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 04/22/2022] [Accepted: 04/24/2022] [Indexed: 12/21/2022] Open
Abstract
Developing bioactive biomaterials with highly controlled functions is crucial to enhancing their applications in regenerative medicine. Citrate-based polymers are the few bioactive polymer biomaterials used in biomedicine because of their facile synthesis, controllable structure, biocompatibility, biomimetic viscoelastic mechanical behavior, and functional groups available for modification. In recent years, various multifunctional designs and biomedical applications, including cardiovascular, orthopedic, muscle tissue, skin tissue, nerve and spinal cord, bioimaging, and drug or gene delivery based on citrate-based polymers, have been extensively studied, and many of them have good clinical application potential. In this review, we summarize recent progress in the multifunctional design and biomedical applications of citrate-based polymers. We also discuss the further development of multifunctional citrate-based polymers with tailored properties to meet the requirements of various biomedical applications. Multifunctional bioactive citrate-based biomaterials have broad applications in regenerative medicine. Recent advances in multifunctional design and biomedical applications of citate-based polymers are summarized. Future challenge of citrate-based polymers in various biomedical applications are discussed.
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Mudigonda J, Xu D, Amedi A, Lane BA, Corporan D, Wang V, Padala M. A Biohybrid Material With Extracellular Matrix Core and Polymeric Coating as a Cell Honing Cardiovascular Tissue Substitute. Front Cardiovasc Med 2022; 9:807255. [PMID: 35402573 PMCID: PMC8987446 DOI: 10.3389/fcvm.2022.807255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Accepted: 01/20/2022] [Indexed: 11/13/2022] Open
Abstract
ObjectiveTo investigate the feasibility of a hybrid material in which decellularized pericardial extracellular matrix is functionalized with polymeric nanofibers, for use as a cardiovascular tissue substitute.BackgroundA cardiovascular tissue substitute, which is gradually resorbed and is replaced by host's native tissue, has several advantages. Especially in children and young adults, a resorbable material can be useful in accommodating growth, but also enable rapid endothelialization that is necessary to avoid thrombotic complications. In this study, we report a hybrid material, wherein decellularized pericardial matrix is functionalized with a layer of polymeric nanofibers, to achieve the mechanical strength for implantation in the cardiovascular system, but also have enhanced cell honing capacity.MethodsPericardial sacs were decellularized with sodium deoxycholate, and polycaprolactone-chitosan fibers were electrospun onto the matrix. Tissue-polymer interaction was evaluated using spectroscopic methods, and the mechanical properties of the individual components and the hybrid material were quantified. In-vitro blood flow loop studies were conducted to assess hemocompatibility and cell culture methods were used to assess biocompatibility.ResultsEncapsulation of the decellularized matrix with 70 μm thick matrix of polycaprolactone-chitosan nanofibers, was feasible and reproducible. Spectroscopy of the cross-section depicted new amide bond formation and C–O–C stretch at the interface. An average peel strength of 56.13 ± 11.87 mN/mm2 was measured, that is sufficient to withstand a high shear of 15 dynes/cm2 without delamination. Mechanical strength and extensibility ratio of the decellularized matrix alone were 18,000 ± 4,200 KPa and 0.18 ± 0.03% whereas that of the hybrid was higher at 20,000 ± 6,600 KPa and 0.35 ± 0.20%. Anisotropy index and stiffness of the biohybrid were increased as well. Neither thrombus formation, nor platelet adhesion or hemolysis was measured in the in-vitro blood flow loop studies. Cellular adhesion and survival were adequate in the material.ConclusionEncapsulating a decellularized matrix with a polymeric nanofiber coating, has favorable attributes for use as a cardiovascular tissue substitute.
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Affiliation(s)
- Jahnavi Mudigonda
- Structural Heart Research & Innovation Laboratory, Carlyle Fraser Heart Center, Emory University Hospital Midtown, Atlanta, GA, United States
- Division of Cardiothoracic Surgery, Emory University School of Medicine, Atlanta, GA, United States
| | - Dongyang Xu
- Structural Heart Research & Innovation Laboratory, Carlyle Fraser Heart Center, Emory University Hospital Midtown, Atlanta, GA, United States
- Division of Cardiothoracic Surgery, Emory University School of Medicine, Atlanta, GA, United States
| | - Alan Amedi
- Structural Heart Research & Innovation Laboratory, Carlyle Fraser Heart Center, Emory University Hospital Midtown, Atlanta, GA, United States
- Division of Cardiothoracic Surgery, Emory University School of Medicine, Atlanta, GA, United States
| | - Brooks A. Lane
- Structural Heart Research & Innovation Laboratory, Carlyle Fraser Heart Center, Emory University Hospital Midtown, Atlanta, GA, United States
- Division of Cardiothoracic Surgery, Emory University School of Medicine, Atlanta, GA, United States
| | - Daniella Corporan
- Structural Heart Research & Innovation Laboratory, Carlyle Fraser Heart Center, Emory University Hospital Midtown, Atlanta, GA, United States
- Division of Cardiothoracic Surgery, Emory University School of Medicine, Atlanta, GA, United States
| | - Vivian Wang
- Structural Heart Research & Innovation Laboratory, Carlyle Fraser Heart Center, Emory University Hospital Midtown, Atlanta, GA, United States
| | - Muralidhar Padala
- Structural Heart Research & Innovation Laboratory, Carlyle Fraser Heart Center, Emory University Hospital Midtown, Atlanta, GA, United States
- Division of Cardiothoracic Surgery, Emory University School of Medicine, Atlanta, GA, United States
- *Correspondence: Muralidhar Padala
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9
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Demko P, Hillebrandt KH, Napierala H, Haep N, Tang P, Gassner JMGV, Kluge M, Everwien H, Polenz D, Reutzel-Selke A, Raschzok N, Pratschke J, Sauer IM, Struecker B, Dobrindt EM. Perfusion-Based Recellularization of Rat Livers with Islets of Langerhans. J Med Biol Eng 2022. [DOI: 10.1007/s40846-022-00697-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Abstract
Purpose
Artificial organs might serve as alternative solutions for whole organ transplantation. Decellularization of a liver provides a non-immunogenic matrix with the advantage of three afferent systems, the portal vein, the hepatic artery and the bile duct. This study aims to evaluate the recellularization of rat livers with islets of Langerhans via the bile duct and the portal vein for the comparison of different perfusion routes.
Methods
Rat livers were decellularized in a pressure-controlled perfusion manner and repopulated with intact isolated islets of Langerhans via either the portal vein or the bile duct.
Results
Repopulation via the portal vein showed islet clusters stuck within the vascular system demonstrated by ellipsoid borders of thick reticular tissue around the islet cluster in Azan staining. After recellularization via the bile duct, islets were distributed close to the vessels within the parenchymal space and without a surrounding reticular layer. Large clusters of islets had a diameter of up to 1000 µm without clear shapes.
Conclusion
We demonstrated the bile duct to be superior to the portal vein for repopulation of a decellularized rat liver with islets of Langerhans. This technique may serve as a bioengineering platform to generate an implantable and functional endocrine neo-pancreas and provide scaffolds with the anatomic benefit of three afferent systems to facilitate co-population of cells.
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10
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Ode Boni BO, Bakadia BM, Osi AR, Shi Z, Chen H, Gauthier M, Yang G. Immune Response to Silk Sericin-Fibroin Composites: Potential Immunogenic Elements and Alternatives for Immunomodulation. Macromol Biosci 2021; 22:e2100292. [PMID: 34669251 DOI: 10.1002/mabi.202100292] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 10/09/2021] [Indexed: 12/22/2022]
Abstract
The unique properties of silk proteins (SPs), particularly silk sericin (SS) and silk fibroin (SF), have attracted attention in the design of scaffolds for tissue engineering over the past decades. Since SF has good mechanical properties, while SS displays bioactivity, scaffolds combining both proteins should exhibit complementary properties enhancing the potential of these materials. Unfortunately, SS-SF composites can generate chronic immune responses and their immunogenic element is not completely clear. The potential of SS-SF composites in tissue engineering, elements which may contribute to their immunogenicity, and alternatives for their preparation and design, to modulate the immune response and take advantage of their useful properties, are discussed in this review. It is known that SS can enhance β-sheet formation in SF, which may act as hydrophobic regions with a strong affinity for adsorption proteins inducing the chronic recruitment of inflammatory cells. Therefore, tailoring the exposure of hydrophobic regions at the scaffold surface should represent a viable strategy to modulate the immune response. This can be achieved by coating SS-SF composites with SS or other hydrophilic polymers, to take advantage of their antibiofouling properties. Research is still needed to realize the full potential of these composites for tissue engineering.
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Affiliation(s)
- Biaou Oscar Ode Boni
- National Engineering Research Center for Nano-Medicine, Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, 430074, P. R. China
| | - Bianza Moïse Bakadia
- National Engineering Research Center for Nano-Medicine, Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, 430074, P. R. China
| | - Amarachi Rosemary Osi
- Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China
| | - Zhijun Shi
- National Engineering Research Center for Nano-Medicine, Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, 430074, P. R. China
| | - Hong Chen
- Department of Rehabilitation, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Mario Gauthier
- Department of Chemistry, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada
| | - Guang Yang
- National Engineering Research Center for Nano-Medicine, Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, 430074, P. R. China
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Liu X, Yu K, Cheng S, Ren T, Maitusong M, Liu F, Chen J, Qian Y, Xu D, Zhu G, Fang J, Cao N, Wang J. Ulvan mediated VE cadherin antibody and REDV peptide co-modification to improve endothelialization potential of bioprosthetic heart valves. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 128:112337. [PMID: 34474888 DOI: 10.1016/j.msec.2021.112337] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 06/29/2021] [Accepted: 07/22/2021] [Indexed: 12/20/2022]
Abstract
An aging population and a rapid increase in the incidence of degenerative valve diseases have led to greater use of bioprosthetic heart valves (BHVs). The durability of glutaraldehyde cross-linked bioprostheses currently available for clinical use is poor due to calcification, coagulation, and degradation. Decellularization can partially reduce calcification by removal of xenogenic cells, but can also lead to thrombosis, which can be addressed by further surface modification. The natural sulfated polysaccharide ulvan possesses antithrombotic and anti-inflammatory properties, and can behave as a heparinoid to immobilize proteins through their heparin binding sites. VE-cadherin antibody and the Arg-Glu-Asp-Val (REDV) peptide can facilitate selective endothelial cell attachment, adhesion and proliferation. In this study, we functionalized decellularized porcine pericardium (DPP) with ulvan, REDV, and VE-cadherin antibody (U-R-VE). Ulvan was covalently modified to act as a protective coating and spacer for VE-cadherin antibody, and to immobilize REDV. In in vitro tests, we found that functionalization significantly and selectively promoted adhesion and growth of endothelial cells while reducing platelet adhesion, inflammation, and in vitro calcification of DPPs. In an in vivo subdermal implantation model, U-R-VE modified DPP exhibited greater endothelialization potential and biocompatibility compared with unmodified pericardium. Thus, U-R-VE modification provides a promising solution to the problem of preparing BHVs with enhanced endothelialization potential.
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Affiliation(s)
- Xianbao Liu
- Department of Cardiology of The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, PR China; Cardiovascular Key Laboratory of Zhejiang Province, Hangzhou, PR China
| | - Kaixiang Yu
- Department of Cardiology of The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, PR China; Cardiovascular Key Laboratory of Zhejiang Province, Hangzhou, PR China
| | - Si Cheng
- Department of Cardiology of The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, PR China; Cardiovascular Key Laboratory of Zhejiang Province, Hangzhou, PR China
| | - Tanchen Ren
- Department of Cardiology of The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, PR China; Cardiovascular Key Laboratory of Zhejiang Province, Hangzhou, PR China
| | - Miribani Maitusong
- Department of Cardiology of The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, PR China; Cardiovascular Key Laboratory of Zhejiang Province, Hangzhou, PR China
| | - Feng Liu
- Department of Cardiology of The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, PR China; Cardiovascular Key Laboratory of Zhejiang Province, Hangzhou, PR China
| | - Jinyong Chen
- Department of Cardiology of The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, PR China; Cardiovascular Key Laboratory of Zhejiang Province, Hangzhou, PR China
| | - Yi Qian
- Department of Cardiology of The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, PR China; Cardiovascular Key Laboratory of Zhejiang Province, Hangzhou, PR China
| | - Dilin Xu
- Department of Cardiology of The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, PR China; Cardiovascular Key Laboratory of Zhejiang Province, Hangzhou, PR China
| | - Gangjie Zhu
- Department of Cardiology of The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, PR China; Cardiovascular Key Laboratory of Zhejiang Province, Hangzhou, PR China
| | - Juan Fang
- Department of Cardiology of The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, PR China; Cardiovascular Key Laboratory of Zhejiang Province, Hangzhou, PR China
| | - Naifang Cao
- Department of Cardiology of The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, PR China; Cardiovascular Key Laboratory of Zhejiang Province, Hangzhou, PR China
| | - Jian'an Wang
- Department of Cardiology of The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, PR China; Cardiovascular Key Laboratory of Zhejiang Province, Hangzhou, PR China.
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12
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Lepedda AJ, Nieddu G, Formato M, Baker MB, Fernández-Pérez J, Moroni L. Glycosaminoglycans: From Vascular Physiology to Tissue Engineering Applications. Front Chem 2021; 9:680836. [PMID: 34084767 PMCID: PMC8167061 DOI: 10.3389/fchem.2021.680836] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Accepted: 05/03/2021] [Indexed: 12/27/2022] Open
Abstract
Cardiovascular diseases represent the number one cause of death globally, with atherosclerosis a major contributor. Despite the clinical need for functional arterial substitutes, success has been limited to arterial replacements of large-caliber vessels (diameter > 6 mm), leaving the bulk of demand unmet. In this respect, one of the most challenging goals in tissue engineering is to design a "bioactive" resorbable scaffold, analogous to the natural extracellular matrix (ECM), able to guide the process of vascular tissue regeneration. Besides adequate mechanical properties to sustain the hemodynamic flow forces, scaffold's properties should include biocompatibility, controlled biodegradability with non-toxic products, low inflammatory/thrombotic potential, porosity, and a specific combination of molecular signals allowing vascular cells to attach, proliferate and synthesize their own ECM. Different fabrication methods, such as phase separation, self-assembly and electrospinning are currently used to obtain nanofibrous scaffolds with a well-organized architecture and mechanical properties suitable for vascular tissue regeneration. However, several studies have shown that naked scaffolds, although fabricated with biocompatible polymers, represent a poor substrate to be populated by vascular cells. In this respect, surface functionalization with bioactive natural molecules, such as collagen, elastin, fibrinogen, silk fibroin, alginate, chitosan, dextran, glycosaminoglycans (GAGs), and growth factors has proven to be effective. GAGs are complex anionic unbranched heteropolysaccharides that represent major structural and functional ECM components of connective tissues. GAGs are very heterogeneous in terms of type of repeating disaccharide unit, relative molecular mass, charge density, degree and pattern of sulfation, degree of epimerization and physicochemical properties. These molecules participate in a number of vascular events such as the regulation of vascular permeability, lipid metabolism, hemostasis, and thrombosis, but also interact with vascular cells, growth factors, and cytokines to modulate cell adhesion, migration, and proliferation. The primary goal of this review is to perform a critical analysis of the last twenty-years of literature in which GAGs have been used as molecular cues, able to guide the processes leading to correct endothelialization and neo-artery formation, as well as to provide readers with an overall picture of their potential as functional molecules for small-diameter vascular regeneration.
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Affiliation(s)
| | - Gabriele Nieddu
- Department of Biomedical Sciences, University of Sassari, Sassari, Italy
| | - Marilena Formato
- Department of Biomedical Sciences, University of Sassari, Sassari, Italy
| | - Matthew Brandon Baker
- Complex Tissue Regeneration Department, MERLN Institute for Technology Inspired Regenerative Medicine, Maastricht, Netherlands
| | - Julia Fernández-Pérez
- Complex Tissue Regeneration Department, MERLN Institute for Technology Inspired Regenerative Medicine, Maastricht, Netherlands
| | - Lorenzo Moroni
- Complex Tissue Regeneration Department, MERLN Institute for Technology Inspired Regenerative Medicine, Maastricht, Netherlands
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13
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Kimicata M, Swamykumar P, Fisher JP. Extracellular Matrix for Small-Diameter Vascular Grafts. Tissue Eng Part A 2020; 26:1388-1401. [PMID: 33231135 PMCID: PMC7759287 DOI: 10.1089/ten.tea.2020.0201] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Accepted: 11/11/2020] [Indexed: 01/15/2023] Open
Abstract
To treat coronary heart disease, coronary artery bypass grafts are used to divert blood flow around blockages in the coronary arteries. Autologous grafts are the gold standard of care, but they are characterized by their lack of availability, low quality, and high failure rates. Alternatively, tissue-engineered small-diameter vascular grafts made from synthetic or natural polymers have not demonstrated adequate results to replace autologous grafts; synthetic grafts result in a loss of patency due to thrombosis and intimal hyperplasia, whereas scaffolds from natural polymers are generally unable to support the physiological conditions. Extracellular matrix (ECM) from a variety of sources, including cell-derived, 2D, and cannular tissues, has become an increasingly useful tool for this application. The current review examines the ECM-based methods that have recently been investigated in the field and comments on their viability for clinical applications.
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Affiliation(s)
- Megan Kimicata
- Department of Materials Science and Engineering, University of Maryland, College Park, Maryland, USA
- Center for Engineering Complex Tissues, and University of Maryland, College Park, Maryland, USA
| | - Prateek Swamykumar
- Center for Engineering Complex Tissues, and University of Maryland, College Park, Maryland, USA
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland, USA
| | - John P. Fisher
- Center for Engineering Complex Tissues, and University of Maryland, College Park, Maryland, USA
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland, USA
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14
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Engineering an endothelialized, endocrine Neo-Pancreas: Evaluation of islet functionality in an ex vivo model. Acta Biomater 2020; 117:213-225. [PMID: 32949822 DOI: 10.1016/j.actbio.2020.09.022] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 09/08/2020] [Accepted: 09/10/2020] [Indexed: 12/15/2022]
Abstract
Islet-based recellularization of decellularized, repurposed rat livers may form a transplantable Neo-Pancreas. The aim of this study is the establishment of the necessary protocols, the evaluation of the organ structure and the analysis of the islet functionality ex vivo. After perfusion-based decellularization of rat livers, matrices were repopulated with endothelial cells and mesenchymal stromal cells, incubated for 8 days in a perfusion chamber, and finally repopulated on day 9 with intact rodent islets. Integrity and quality of re-endothelialization was assessed by histology and FITC-dextran perfusion assay. Functionality of the islets of Langerhans was determined on day 10 and day 12 via glucose stimulated insulin secretion. Blood gas analysis variables confirmed the stability of the perfusion cultivation. Histological staining showed that cells formed a monolayer inside the intact vascular structure. These findings were confirmed by electron microscopy. Islets infused via the bile duct could histologically be found in the parenchymal space. Adequate insulin secretion after glucose stimulation after 1-day and 3-day cultivation verified islet viability and functionality after the repopulation process. We provide the first proof-of-concept for the functionality of islets of Langerhans engrafted in a decellularized rat liver. Furthermore, a re-endothelialization step was implemented to provide implantability. This technique can serve as a bioengineered platform to generate implantable and functional endocrine Neo-Pancreases.
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15
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Capistrano G, Sousa-Junior AA, Silva RA, Mello-Andrade F, Cintra ER, Santos S, Nunes AD, Lima RM, Zufelato N, Oliveira AS, Pereira M, Castro CH, Lima EM, Cardoso CG, Silveira-Lacerda E, Mendanha SA, Bakuzis AF. IR-780-Albumin-Based Nanocarriers Promote Tumor Regression Not Only from Phototherapy but Also by a Nonirradiation Mechanism. ACS Biomater Sci Eng 2020; 6:4523-4538. [DOI: 10.1021/acsbiomaterials.0c00164] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Gustavo Capistrano
- Instituto de Física, Universidade Federal de Goiás, 74690-900 Goiânia−GO, Brasil
| | | | - Roosevelt A. Silva
- Nucleo Colaborativo de BioSistemas, Universidade Federal de Goiás, 75804-020 Jataí−GO, Brasil
| | - Francyelli Mello-Andrade
- Departamento de Química, Instituto Federal de Educação, Ciência e Tecnologia de Goiás, 74055-110 Goiânia−GO, Brasil
| | - Emilio R. Cintra
- Faculdade de Farmácia, Universidade Federal de Goiás, 74605-220 Goiânia−GO, Brasil
| | - Sônia Santos
- Instituto de Ciências Biológicas, Universidade Federal de Goiás, 74001-970 Goiânia−GO, Brasil
| | - Allancer D. Nunes
- Instituto de Ciências Biológicas, Universidade Federal de Goiás, 74001-970 Goiânia−GO, Brasil
| | - Raisa M. Lima
- Instituto de Ciências Biológicas, Universidade Federal de Goiás, 74001-970 Goiânia−GO, Brasil
| | - Nicholas Zufelato
- Instituto de Física, Universidade Federal de Goiás, 74690-900 Goiânia−GO, Brasil
| | - André S. Oliveira
- Instituto de Ciências Biológicas, Universidade Federal de Goiás, 74001-970 Goiânia−GO, Brasil
| | - Maristela Pereira
- Instituto de Ciências Biológicas, Universidade Federal de Goiás, 74001-970 Goiânia−GO, Brasil
| | - Carlos H. Castro
- Instituto de Ciências Biológicas, Laboratório Integrado de Fisiopatologia Cardiovascular e Neurológica, Universidade Federal de Goiás, 74001-970 Goiânia−GO, Brasil
| | - Eliana M. Lima
- Faculdade de Farmácia, Universidade Federal de Goiás, 74605-220 Goiânia−GO, Brasil
| | - Clever G. Cardoso
- Instituto de Ciências Biológicas, Universidade Federal de Goiás, 74001-970 Goiânia−GO, Brasil
| | | | | | - Andris F. Bakuzis
- Instituto de Física, Universidade Federal de Goiás, 74690-900 Goiânia−GO, Brasil
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16
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Reid JA, Callanan A. Hybrid cardiovascular sourced extracellular matrix scaffolds as possible platforms for vascular tissue engineering. J Biomed Mater Res B Appl Biomater 2020; 108:910-924. [PMID: 31369699 PMCID: PMC7079155 DOI: 10.1002/jbm.b.34444] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 07/05/2019] [Accepted: 07/09/2019] [Indexed: 01/13/2023]
Abstract
The aim when designing a scaffold is to provide a supportive microenvironment for the native cells, which is generally achieved by structurally and biochemically imitating the native tissue. Decellularized extracellular matrix (ECM) possesses the mechanical and biochemical cues designed to promote native cell survival. However, when decellularized and reprocessed, the ECM loses its cell supporting mechanical integrity and architecture. Herein, we propose dissolving the ECM into a polymer/solvent solution and electrospinning it into a fibrous sheet, thus harnessing the biochemical cues from the ECM and the mechanical integrity of the polymer. Bovine aorta and myocardium were selected as ECM sources. Decellularization was achieved using sodium dodecyl sulfate (SDS), and the ECM was combined with polycaprolactone and hexafluoro-2-propanol for electrospinning. The scaffolds were seeded with human umbilical vein endothelial cells (HUVECs). The study found that the inclusion of aorta ECM increased the scaffold's wettability and subsequently lead to increased HUVEC adherence and proliferation. Interestingly, the inclusion of myocardium ECM had no effect on wettability or cell viability. Furthermore, gene expression and mechanical changes were noted with the addition of ECM. The results from this study show the vast potential of electrospun ECM/polymer bioscaffolds and their use in tissue engineering.
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Affiliation(s)
- James A. Reid
- Institute for Bioengineering, School of EngineeringThe University of EdinburghEdinburghUK
| | - Anthony Callanan
- Institute for Bioengineering, School of EngineeringThe University of EdinburghEdinburghUK
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17
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Li W, Fu Y, Jiang B, Lo AY, Ameer GA, Barnett C, Wang B. Polymer-integrated amnion scaffold significantly improves cleft palate repair. Acta Biomater 2019; 92:104-114. [PMID: 31102764 DOI: 10.1016/j.actbio.2019.05.035] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 04/08/2019] [Accepted: 05/13/2019] [Indexed: 11/17/2022]
Abstract
Cleft palate is a common oral and craniomaxillofacial birth defect. As the ideal surgery time is shortly after birth, clinical treatments should result in minimal disruption of theskeleton to allow tissue growth in children. A tissue-engineered graft was created in this study for cleft palate repair by integrating poly(1,8-octamethylene-citrate) (POC) with a decellularized amnion membrane (DAM-POC) to incorporate the advantages of both the synthetic polymer and the native tissue. The success of POC incorporation was confirmed by laser-induced breakdown spectroscopy and fluorescence detection. The DAM-POC scaffold showed a certain level of structure collapse and lower stiffness but better resistance to enzyme digestion than the native amnion and DAM scaffold. The DAM-POC scaffold is cell compatible when seeded with mesenchymal stem cells, as evidenced by adequate cell viability and improved alkaline phosphatase (ALP) activity and calcium deposit. A large palate defect was first surgically created in a young rat model and then repaired with the DAM-POC scaffold. Eight weeks postsurgery, histological study and CT scans showed nearly complete healing of both soft and hard tissues. In conclusion, we developed a cell-free, resorbable graft by incorporating and integrating a synthetic polymer with a human DAM. When the DAM-POC scaffold was applied to repair a large palate defect in young rats, it showed adequate biocompatibility as evidenced by its effectiveness in guiding hard and soft tissue regeneration and minimum interference with natural growth and palate development of rats. STATEMENT OF SIGNIFICANCE: Proper restoration of severe cleft palate remains a major challenge because of insufficient autologous soft tissues to close the open wounds, thereby causing high tension at the surgical junction, secondary palatal fistulas, wound contraction, scar tissue formation, and facial growth disturbances. In this study, we have developed a tissue-engineered graft through incorporating and integrating a synthetic polymer with the human amnion membrane for cleft palate repair. The significance of this study lies in our ability to develop a cell-free, resorbable graft that can provide a less surgically invasive option to cover the open defect and support palate regeneration and tissue growth. This technique could potentially advance soft and hard tissue regeneration in children with birth craniomaxillofacial defects.
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Affiliation(s)
- Wuwei Li
- Department of Oral and Maxillofacial Surgery, School of Stomatology, Dalian Medical University, Liaoning 116001, China
| | - Yuqian Fu
- Department of Oral and Maxillofacial Surgery, School of Stomatology, Dalian Medical University, Liaoning 116001, China
| | - Bin Jiang
- Biomedical Engineering Department, Northwestern University, Evanston, IL 60201, United States; Center for Advanced Regenerative Engineering, Northwestern University, Evanston, IL 60201, United States
| | - Aaron Y Lo
- Biomedical Engineering Department, Northwestern University, Evanston, IL 60201, United States; Center for Advanced Regenerative Engineering, Northwestern University, Evanston, IL 60201, United States
| | - Guillermo A Ameer
- Biomedical Engineering Department, Northwestern University, Evanston, IL 60201, United States; Center for Advanced Regenerative Engineering, Northwestern University, Evanston, IL 60201, United States
| | - Cleon Barnett
- Department of Physical Sciences, Alabama State University, Montgomery, AL 36104, United States
| | - Bo Wang
- Joint Department of Biomedical Engineering, Marquette University and the Medical College of Wisconsin, Milwaukee, WI 53226, United States.
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18
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Surface biofunctionalization of the decellularized porcine aortic valve with VEGF-loaded nanoparticles for accelerating endothelialization. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 97:632-643. [PMID: 30678950 DOI: 10.1016/j.msec.2018.12.079] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Revised: 12/09/2018] [Accepted: 12/24/2018] [Indexed: 12/15/2022]
Abstract
The original intention for building a tissue-engineered heart valve (TEHV) was to simulate a normal heart valve and overcome the insufficiency of the commonly used heart valve replacement in the clinic. The endothelialization of the TEHV is very important as the endothelialized TEHV can decrease platelet adhesion and delay the valvular calcification decline process. In this work, we encapsulated vascular endothelial growth factor (VEGF) into polycaprolactone (PCL) nanoparticles. Then, through the Michael addition reaction, PCL nanoparticles were introduced onto the decellularized aortic valve to prepare a hybrid valve. The encapsulation efficiency of the PCL nanoparticles for VEGF was up to 82%, and the in vitro accumulated release rate was slow without an evident initial burst release. In addition, the hybrid valve had a decreased hemolysis ratio and possessed antiplatelet adhesion capacity, and it was able to promote the adhesion and proliferation of endothelial cells, covering the surface with a dense cell layer to accelerate endothelialization. An experiment involving the subcutaneous implant in SD rats showed that at week 8, lots of blood capillaries were formed in the hybrid valve. Mechanics performance testing indicated that the mechanical property of the hybrid valve was partly improved. Taken together, we applied a nano-drug controlled release system to fabricate TEHV, and provide an approach for the biofunctionalization of the TEHV scaffold for accelerating endothelialization.
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Jiang B, Suen R, Wang JJ, Zhang ZJ, Wertheim JA, Ameer GA. Vascular scaffolds with enhanced antioxidant activity inhibit graft calcification. Biomaterials 2017; 144:166-175. [PMID: 28841463 DOI: 10.1016/j.biomaterials.2017.08.014] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Revised: 08/08/2017] [Accepted: 08/13/2017] [Indexed: 10/19/2022]
Abstract
There is a need for off-the-shelf, small-diameter vascular grafts that are safe and exhibit high long-term patency. Decellularized tissues can potentially be used as vascular grafts; however, thrombogenic and unpredictable remodeling properties such as intimal hyperplasia and calcification are concerns that hinder their clinical use. The objective of this study was to investigate the long-term function and remodeling of extracellular matrix (ECM)-based vascular grafts composited with antioxidant poly(1, 8-octamethylene-citrate-co-cysteine) (POCC) with or without immobilized heparin. Rat aortas were decellularized to create the following vascular grafts: 1) ECM hybridized with POCC (Poly-ECM), 2) Poly-ECM subsequently functionalized with heparin (Poly-ECM-Hep), and 3) non-modified vascular ECM. Grafts were evaluated as interposition grafts in the abdominal aorta of adult rats at three months. All grafts displayed antioxidant activity, were patent, and exhibited minimal intramural cell infiltration with varying degrees of calcification. Areas of calcification co-localized with osteochondrogenic differentiation of vascular smooth muscle cells, lipid peroxidation, oxidized DNA damage, and cell apoptosis, suggesting an important role for oxidative stress in the calcification of grafts. The extent of calcification within grafts was inversely proportional to their antioxidant activity: Poly-ECM-Hep > ECM > Poly-ECM. The incorporation of antioxidants into vascular grafts may be a viable strategy to inhibit degenerative changes.
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Affiliation(s)
- Bin Jiang
- Biomedical Engineering Department, Northwestern University, Evanston, IL, 60208, USA; Comprehensive Transplant Center, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA; Department of Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA; Center for Advanced Regenerative Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Rachel Suen
- Weinberg College of Arts and Sciences, Northwestern University, Evanston, IL, 60208, USA
| | - Jiao-Jing Wang
- Comprehensive Transplant Center, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA; Department of Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA
| | - Zheng J Zhang
- Comprehensive Transplant Center, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA; Department of Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA
| | - Jason A Wertheim
- Biomedical Engineering Department, Northwestern University, Evanston, IL, 60208, USA; Comprehensive Transplant Center, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA; Department of Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA; Department of Surgery, Jesse Brown VA Medical Center, Chicago, IL, 60612, USA; Chemistry of Life Processes Institute, Northwestern University, Evanston, IL, 60208, USA; Simpson Querrey Institute, Northwestern University, Chicago, IL, 60611, USA; Center for Advanced Regenerative Engineering, Northwestern University, Evanston, IL, 60208, USA.
| | - Guillermo A Ameer
- Biomedical Engineering Department, Northwestern University, Evanston, IL, 60208, USA; Department of Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA; Chemistry of Life Processes Institute, Northwestern University, Evanston, IL, 60208, USA; Simpson Querrey Institute, Northwestern University, Chicago, IL, 60611, USA; Center for Advanced Regenerative Engineering, Northwestern University, Evanston, IL, 60208, USA.
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20
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Gupta N, Susa K, Morizane R. Regenerative Medicine, Disease Modeling, and Drug Discovery in Human Pluripotent Stem Cell-derived Kidney Tissue. EUROPEAN MEDICAL JOURNAL. REPRODUCTIVE HEALTH 2017; 3:57-67. [PMID: 31157117 PMCID: PMC6544146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The multitude of research clarifying critical factors in embryonic organ development has been instrumental in human stem cell research. Mammalian organogenesis serves as the archetype for directed differentiation protocols, subdividing the process into a series of distinct intermediate stages that can be chemically induced and monitored for the expression of stage-specific markers. Significant advances over the past few years include established directed differentiation protocols of human embryonic stem cells (hESCs) and human induced pluripotent stem cells (hiPSCs) into human kidney organoids in vitro. Human kidney tissue in vitro simulate the in vivo response when subject to nephrotoxins, providing a novel screening platform during drug discovery to facilitate identification of lead candidates, reduce developmental expenditures, and reduce future rates of drug-induced acute kidney injury. Patient-derived hiPSCs, which bear naturally occurring DNA mutations, may allow for modeling of human genetic diseases to determine pathologic mechanisms and screen for novel therapeutics. In addition, recent advances in genome editing with CRISPR/Cas9 enable to generate specific mutations to study genetic disease with non-mutated lines serving as an ideal isogenic control. The growing population of patients with end-stage kidney disease (ESKD) is a world-wide healthcare problem with higher morbidity and mortality that warrants the discovery of novel forms of renal replacement therapy. Coupling the outlined advances in hiPSC research with innovative bioengineering techniques, such as decellularized kidney and 3D printed scaffolds, may contribute to the development of bioengineered transplantable human kidney tissue as a means of renal replacement therapy.
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Affiliation(s)
- Navin Gupta
- Department of Medicine, Renal Division, Brigham and Women’s Hospital, Boston, Massachusetts, 02115, USA
- Harvard Medical School, Boston, Massachusetts, 02115, USA
- Harvard Stem Cell Institute, Cambridge, Massachusetts, 02138, USA
| | - Koichiro Susa
- Department of Medicine, Renal Division, Brigham and Women’s Hospital, Boston, Massachusetts, 02115, USA
- Harvard Medical School, Boston, Massachusetts, 02115, USA
| | - Ryuji Morizane
- Department of Medicine, Renal Division, Brigham and Women’s Hospital, Boston, Massachusetts, 02115, USA
- Harvard Medical School, Boston, Massachusetts, 02115, USA
- Harvard Stem Cell Institute, Cambridge, Massachusetts, 02138, USA
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21
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Jiang B, Wu Y, Haney CR, Duan C, Ameer GA. Assessment of an engineered endothelium via single-photon emission computed tomography. Biotechnol Bioeng 2017; 114:2371-2378. [PMID: 28542804 DOI: 10.1002/bit.26342] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Revised: 05/17/2017] [Accepted: 05/17/2017] [Indexed: 12/11/2022]
Abstract
The clinical translation of cell-based therapeutics often requires highly sensitive, non-invasive imaging tools to assess cell function and distribution in vivo. The objective of this research was to determine whether human Sodium-Iodide Symporter (hNIS) ectopic expression in endothelial cells (ECs) in combination with single-photon emission computed tomography (SPECT) is a feasible approach to non-invasively monitor the presence and viability of an engineered endothelium on expanded polytetrafluoroethylene (ePTFE). Human umbilical vein endothelial cells (HUVECs) were transduced with pLL3.7-hNIS via lentivirus with multiplicity of infection (MOI) of 0, 2, 5, and 10 (n = 4). Ectopic expression of hNIS in HUVECs via optimized lentiviral transduction (MOI 5) enabled cell uptake of a radioisotope that can be detected by SPECT without affecting endothelial cell viability, oxidative stress, or antithrombogenic functions. The viability and distribution of an engineered endothelium grown on ePTFE coated with the biodegradable elastomer poly(1, 8 octamethylene citrate) (POC) and exposed to fluid flow was successfully monitored non-invasively by SPECT. We report the feasibility of a non-invasive, highly sensitive and functional assessment of an engineered endothelium on ePTFE using a combination of SPECT and X-ray computed tomography (SPECT/CT) imaging and hNIS ectopic expression in ECs. This technology potentially allows for the non-invasive assessment of transplanted living cells in vascular conduits. Biotechnol. Bioeng. 2017;114: 2371-2377. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Bin Jiang
- Biomedical Engineering Department, Northwestern University, Sc.D 2145 Sheridan Road, Tech B382, Evanston, Illinois, 60208.,Department of Surgery, Northwestern University, Chicago, Illinois
| | - Yidi Wu
- Biomedical Engineering Department, Northwestern University, Sc.D 2145 Sheridan Road, Tech B382, Evanston, Illinois, 60208.,Master of Biotechnology Program, Northwestern University, Evanston, Illinois
| | - Chad R Haney
- Biomedical Engineering Department, Northwestern University, Sc.D 2145 Sheridan Road, Tech B382, Evanston, Illinois, 60208.,Chemistry of Life Processes Institute, Northwestern University, Evanston, Illinois.,Center for Advanced Molecular Imaging, Northwestern University, Evanston, Illinois
| | - Chongwen Duan
- Biomedical Engineering Department, Northwestern University, Sc.D 2145 Sheridan Road, Tech B382, Evanston, Illinois, 60208
| | - Guillermo A Ameer
- Biomedical Engineering Department, Northwestern University, Sc.D 2145 Sheridan Road, Tech B382, Evanston, Illinois, 60208.,Department of Surgery, Northwestern University, Chicago, Illinois.,Chemistry of Life Processes Institute, Northwestern University, Evanston, Illinois.,International Institute for Nanotechnology, Northwestern University, Evanston, Illinois.,Simpson Querrey Institute for Bionanotechnology, Northwestern University, Chicago, Illinois
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22
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Engineering an endocrine Neo-Pancreas by repopulation of a decellularized rat pancreas with islets of Langerhans. Sci Rep 2017; 7:41777. [PMID: 28150744 PMCID: PMC5288794 DOI: 10.1038/srep41777] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Accepted: 12/29/2016] [Indexed: 01/06/2023] Open
Abstract
Decellularization of pancreata and repopulation of these non-immunogenic matrices with islets and endothelial cells could provide transplantable, endocrine Neo- Pancreata. In this study, rat pancreata were perfusion decellularized and repopulated with intact islets, comparing three perfusion routes (Artery, Portal Vein, Pancreatic Duct). Decellularization effectively removed all cellular components but conserved the pancreas specific extracellular matrix. Digital subtraction angiography of the matrices showed a conserved integrity of the decellularized vascular system but a contrast emersion into the parenchyma via the decellularized pancreatic duct. Islets infused via the pancreatic duct leaked from the ductular system into the peri-ductular decellularized space despite their magnitude. TUNEL staining and Glucose stimulated insulin secretion revealed that islets were viable and functional after the process. We present the first available protocol for perfusion decellularization of rat pancreata via three different perfusion routes. Furthermore, we provide first proof-of-concept for the repopulation of the decellularized rat pancreata with functional islets of Langerhans. The presented technique can serve as a bioengineering platform to generate implantable and functional endocrine Neo-Pancreata.
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23
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Jiang B, Suen R, Wertheim JA, Ameer GA. Targeting Heparin to Collagen within Extracellular Matrix Significantly Reduces Thrombogenicity and Improves Endothelialization of Decellularized Tissues. Biomacromolecules 2016; 17:3940-3948. [PMID: 27936727 DOI: 10.1021/acs.biomac.6b01330] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Thrombosis within small-diameter vascular grafts limits the development of bioartificial, engineered vascular conduits, especially those derived from extracellular matrix (ECM). Here we describe an easy-to-implement strategy to chemically modify vascular ECM by covalently linking a collagen binding peptide (CBP) to heparin to form a heparin derivative (CBP-heparin) that selectively binds a subset of collagens. Modification of ECM with CBP-heparin leads to increased deposition of functional heparin (by ∼7.2-fold measured by glycosaminoglycan composition) and a corresponding reduction in platelet binding (>70%) and whole blood clotting (>80%) onto the ECM. Furthermore, addition of CBP-heparin to the ECM stabilizes long-term endothelial cell attachment to the lumen of ECM-derived vascular conduits, potentially through recruitment of heparin-binding growth factors that ultimately improve the durability of endothelialization in vitro. Overall, our findings provide a simple yet effective method to increase deposition of functional heparin on the surface of ECM-based vascular grafts and thereby minimize thrombogenicity of decellularized tissue, overcoming a significant challenge in tissue engineering of bioartificial vessels and vascularized organs.
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Affiliation(s)
- Bin Jiang
- Department of Surgery, Feinberg School of Medicine, Northwestern University , Chicago, Illinois 60611, United States
| | | | - Jason A Wertheim
- Department of Surgery, Feinberg School of Medicine, Northwestern University , Chicago, Illinois 60611, United States.,Department of Surgery, Jesse Brown VA Medical Center , Chicago, Illinois 60612, United States
| | - Guillermo A Ameer
- Department of Surgery, Feinberg School of Medicine, Northwestern University , Chicago, Illinois 60611, United States
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24
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Jiang B, Suen R, Wang JJ, Zhang ZJ, Wertheim JA, Ameer GA. Mechanocompatible Polymer-Extracellular-Matrix Composites for Vascular Tissue Engineering. Adv Healthc Mater 2016; 5:1594-605. [PMID: 27109033 DOI: 10.1002/adhm.201501003] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Revised: 03/03/2016] [Indexed: 11/09/2022]
Abstract
Small-diameter vascular grafts developed from vascular extracellular matrix (ECM) can potentially be used for bypass surgeries and other vascular reconstruction and repair procedures. The addition of heparin to the ECM improves graft hemocompatibility but often involves chemical cross-linking, which increases ECM mechanical stiffness compared to native arteries. Herein, the importance of maintaining ECM mechanocompatibility is demonstrated, and a mechanocompatible strategy to immobilize heparin onto the ECM via a biodegradable elastomer is described. Specifically, poly(1,8-octamethylene citrate)-co-cysteine is hybridized to the ECM, forming a polymer-ECM composite that allows for heparin immobilization via maleimide-thiol "click" chemistry. Heparinized composites reduce platelet adhesion by >60% in vitro, without altering the elastic modulus of the ECM. In a rat abdominal aortic interposition model, intimal hyperplasia in heparinized mechanocompatible grafts is 65% lower when compared to ECM-only control grafts at four weeks. In contrast, grafts that are heparinized with carbodiimide chemistry exhibit increased intimal hyperplasia (4.2-fold) and increased macrophage infiltration (3.5-fold) compared to ECM-only control grafts. All grafts show similar, partial endothelial cell coverage and little to no ECM remodeling. Overall, a mechanocompatible strategy to improve ECM thromboresistance is described and the importance of ECM mechanical properties for proper in vivo graft performance is highlighted.
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Affiliation(s)
- Bin Jiang
- Biomedical Engineering Department; Northwestern University; Evanston IL 60208 USA
- Comprehensive Transplant Center; Feinberg School of Medicine; Northwestern University; Chicago IL 60611 USA
- Department of Surgery; Northwestern University Feinberg School of Medicine; Chicago IL 60611 USA
| | - Rachel Suen
- Weinberg College of Arts and Sciences; Northwestern University; Evanston IL 60208 USA
| | - Jiao-Jing Wang
- Comprehensive Transplant Center; Feinberg School of Medicine; Northwestern University; Chicago IL 60611 USA
- Department of Surgery; Northwestern University Feinberg School of Medicine; Chicago IL 60611 USA
| | - Zheng J. Zhang
- Comprehensive Transplant Center; Feinberg School of Medicine; Northwestern University; Chicago IL 60611 USA
- Department of Surgery; Northwestern University Feinberg School of Medicine; Chicago IL 60611 USA
| | - Jason A. Wertheim
- Biomedical Engineering Department; Northwestern University; Evanston IL 60208 USA
- Comprehensive Transplant Center; Feinberg School of Medicine; Northwestern University; Chicago IL 60611 USA
- Department of Surgery; Northwestern University Feinberg School of Medicine; Chicago IL 60611 USA
- Department of Surgery; Jesse Brown VA Medical Center; Chicago IL 60612 USA
- Chemistry of Life Processes Institute; Northwestern University; Evanston IL 60208 USA. Simpson Querrey Institute; Northwestern University; Chicago IL 60611 USA
| | - Guillermo A. Ameer
- Biomedical Engineering Department; Northwestern University; Evanston IL 60208 USA
- Department of Surgery; Northwestern University Feinberg School of Medicine; Chicago IL 60611 USA
- Chemistry of Life Processes Institute; Northwestern University; Evanston IL 60208 USA
- Simpson Querrey Institute; Northwestern University; Chicago IL 60611 USA
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25
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Sugiura T, Tara S, Nakayama H, Kurobe H, Yi T, Lee YU, Lee AY, Breuer CK, Shinoka T. Novel Bioresorbable Vascular Graft With Sponge-Type Scaffold as a Small-Diameter Arterial Graft. Ann Thorac Surg 2016; 102:720-727. [PMID: 27154152 DOI: 10.1016/j.athoracsur.2016.01.110] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Revised: 12/01/2015] [Accepted: 01/11/2016] [Indexed: 01/22/2023]
Abstract
BACKGROUND Current commercialized small-diameter arterial grafts have not shown clinical effectiveness due to their poor patency rates. The present study evaluated the feasibility of an arterial bioresorbable vascular graft, which has a porous sponge-type scaffold, as a small-diameter arterial conduit. METHODS The grafts were constructed by a 50:50 poly (1-lactic-co-ε-caprolactone) copolymer (PLCL) scaffold reinforced by a poly (1-lactic acid) (PLA) nanofiber. The pore size of the PLCL scaffold was adjusted to a small size (12.8 ± 1.85 μm) or a large size (28.5 ± 5.25 μm). We compared the difference in cellular infiltration, followed by tissue remodeling, between the groups. The grafts were implanted in 8- to 10-week-old female mice (n = 15 in each group) as infrarenal aortic interposition conduits. Animals were monitored for 8 weeks and euthanized to evaluate neotissue formation. RESULTS No aneurysmal change or graft rupture was observed in either group. Histologic assessment demonstrated favorable cell infiltration into scaffolds, neointimal formation with endothelialization, smooth muscle cell proliferation, and elastin deposition in both groups. No significant difference was observed between the groups. Immunohistochemical characterization with anti-F4/80 antibody demonstrated that macrophage infiltration into the grafts occurred in both groups. Staining for M1 and M2, which are the two major macrophage phenotypes, showed no significant difference between groups. CONCLUSIONS Our novel bioresorbable vascular grafts showed well-organized neointimal formation in the high-pressure arterial circulation environment. The large-pore scaffold did not improve cellular infiltration and neotissue formation compared with the small-pore scaffold.
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Affiliation(s)
- Tadahisa Sugiura
- Tissue Engineering Program and Surgical Research, Nationwide Children's Hospital, Columbus, Ohio
| | - Shuhei Tara
- Tissue Engineering Program and Surgical Research, Nationwide Children's Hospital, Columbus, Ohio
| | - Hidetaka Nakayama
- QOL Research Center Laboratory, Gunze Limited, Ayabe-shi, Kyoto, Japan
| | - Hirotsugu Kurobe
- Tissue Engineering Program and Surgical Research, Nationwide Children's Hospital, Columbus, Ohio
| | - Tai Yi
- Tissue Engineering Program and Surgical Research, Nationwide Children's Hospital, Columbus, Ohio
| | - Yong-Ung Lee
- Tissue Engineering Program and Surgical Research, Nationwide Children's Hospital, Columbus, Ohio
| | - Avione Y Lee
- Tissue Engineering Program and Surgical Research, Nationwide Children's Hospital, Columbus, Ohio
| | - Christopher K Breuer
- Tissue Engineering Program and Surgical Research, Nationwide Children's Hospital, Columbus, Ohio
| | - Toshiharu Shinoka
- Tissue Engineering Program and Surgical Research, Nationwide Children's Hospital, Columbus, Ohio; Department of Cardiothoracic Surgery, Nationwide Children's Hospital, Columbus, Ohio.
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26
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Jiang B, Perrin L, Kats D, Meade T, Ameer G. Enabling non-invasive assessment of an engineered endothelium on ePTFE vascular grafts without increasing oxidative stress. Biomaterials 2015; 69:110-20. [PMID: 26283158 DOI: 10.1016/j.biomaterials.2015.07.064] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Revised: 07/29/2015] [Accepted: 07/31/2015] [Indexed: 12/22/2022]
Abstract
Magnetic resonance imaging (MRI) in combination with contrast enhancement is a potentially powerful tool to non-invasively monitor cell distribution in tissue engineering and regenerative medicine. The most commonly used contrast agent for cell labeling is super paramagnetic iron oxide nanoparticles (SPIONs). However, uptake of SPIONs triggers the production of reactive oxygen species (ROS) in cells often leading to a pro-inflammatory phenotype. The objective of this study was to develop a labeling system to non-invasively visualize an engineered endothelium in vascular grafts without creating excessive oxidative stress. Specifically, we investigated: (1) chitosan-coated SPIONs (CSPIONs) as an antioxidant contrast agent for contrast enhancement, and (2) poly(1,8-octamethylene citrate) (POC) as an antioxidant interface to support cell adhesion and function of labeled cells on the vascular graft. While SPION-labeled endothelial cells (ECs) experienced elevated ROS formation and altered cell morphology, CSPION-labeled ECs cultured on POC-coated surfaces mitigated SPION-induced ROS formation and maintained EC morphology, phenotype, viability and functions. A monolayer of labeled ECs exhibited sufficient contrast with T2-weighed MR imaging. CSPION labeling of endothelial cells in combination with coating the graft wall with POC allows non-invasive monitoring of an engineered endothelium on ePTFE grafts without increasing oxidative stress.
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Affiliation(s)
- Bin Jiang
- Biomedical Engineering Department, Northwestern University, Evanston, IL 60201, USA; Department of Surgery, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA
| | - Louisiane Perrin
- Biomedical Engineering Department, Northwestern University, Evanston, IL 60201, USA
| | - Dina Kats
- Interdisciplinary Biological Sciences (IBiS) Program, Northwestern University, Evanston, IL 60201, USA
| | - Thomas Meade
- Department of Chemistry, Northwestern University, Evanston, IL 60201, USA
| | - Guillermo Ameer
- Biomedical Engineering Department, Northwestern University, Evanston, IL 60201, USA; Department of Surgery, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA.
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