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Haderer LM, Zhou Y, Tang P, Daneshgar A, Globke B, Krenzien F, Reutzel-Selke A, Weinhart M, Pratschke J, Sauer IM, Hillebrandt KH, Keshi E. Thrombogenicity assessment of perfusable tissue engineered constructs: a systematic review. TISSUE ENGINEERING. PART B, REVIEWS 2024. [PMID: 39007511 DOI: 10.1089/ten.teb.2024.0078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/16/2024]
Abstract
Vascular surgery faces a critical demand for novel vascular grafts that are biocompatible and thromboresistant. This urgency particularly applies to bypass operations involving small caliber vessels. In the realm of tissue engineering, the development of fully vascularized organs holds great promise as a solution to organ shortage for transplantation. To achieve this, it is imperative to (re-)construct a biocompatible and non-thrombogenic vascular network within these organs. In this systematic review, we identify, classify and discuss basic principles and methods used to perform in vitro/ex vivo dynamic thrombogenicity testing of perfusable tissue engineered organs and tissues. We conducted a pre-registered systematic review of studies published in the last 23 years according to PRISMA-P Guidelines, comprising a systematic data extraction, in-depth analysis and risk of bias assessment of 116 included studies. We identified shaking (n=28), flow loop (n=17), ex vivo (arterio-venous shunt, n=33) and dynamic in vitro models (n=38) as main approaches for thrombogenicity assessment. This comprehensive review unveils a prevalent lack of standardization and serves as a valuable guide in the design of standardized experimental setups.
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Affiliation(s)
| | - Yijun Zhou
- Charite Universitatsmedizin Berlin, Berlin, Berlin, Germany;
| | - Peter Tang
- Charité - Campus Virchow, General-, Visceral-, and Transplantation Surgery, Berlin, Germany;
| | - Assal Daneshgar
- Charite Universitatsmedizin Berlin, Berlin, Berlin, Germany;
| | - Brigitta Globke
- Charite Universitatsmedizin Berlin, Berlin, Berlin, Germany;
| | - Felix Krenzien
- Charite Universitatsmedizin Berlin, Berlin, Berlin, Germany;
| | - Anja Reutzel-Selke
- Charité - Campus Virchow, General-, Visceral-, and Transplantation Surgery, Augustenburger Platz 1, Berlin, Germany, 13353;
| | | | - Johann Pratschke
- Charité - Universitätsmedizin Berlin, General, Visceral, and Transplantation Surgery, Berlin, Germany;
| | - Igor M Sauer
- Charité, General, Visceral and Transplantation Surgery, Augustenburger Platz 1, Berlin, Germany, 13353;
| | - Karl Herbert Hillebrandt
- Charité - Campus Virchow, General-, Visceral-, and Transplantation Surgery, Augstenburgerplatz 1, Berlin, Germany, 13353;
| | - Eriselda Keshi
- Charité Universitätsmedizin Berlin, Chirurgische Klinik, Augustenburger Platz 1, Berlin, Germany, 13353;
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Kern AY, Kreinin Y, Charle L, Epshrein M, Korin N, Mangin PH. A macrofluidic model to investigate the intrinsic thrombogenicity of clinically used stents and develop less thrombogenic stents. Heliyon 2024; 10:e26550. [PMID: 38463800 PMCID: PMC10920166 DOI: 10.1016/j.heliyon.2024.e26550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Revised: 02/08/2024] [Accepted: 02/15/2024] [Indexed: 03/12/2024] Open
Abstract
Microfluidic blood flow models have been instrumental to study the functions of blood platelets in hemostasis and arterial thrombosis. However, they are not suited to investigate the interactions of platelets with the foreign surfaces of medical devices such as stents, mainly because of the dimensions and geometry of the microfluidic channels. Indeed, the channels of microfluidic chips are usually rectangular and rarely exceed 50 to 100 μm in height, impairing the insertion of clinically used stents. To fill this gap, we have developed an original macrofluidic flow system, which precisely reproduces the size and geometry of human vessels and therefore represents a biomimetic perfectly suited to insert a clinical stent and study its interplay with blood cells. The system is a circular closed loop incorporating a macrofluidic flow chamber made of silicone elastomer, which can mimic the exact dimensions of any human vessel, including the coronary, carotid or femoral artery. These flow chambers allow the perfect insertion of stents as they are implanted in patients. Perfusion of whole blood anticoagulated with hirudin through the device at relevant flow rates allows one to observe the specific accumulation of fluorescently labeled platelets on the stent surface using video-microscopy. Scanning electron microscopy revealed the formation of very large thrombi composed of tightly packed activated platelets on the stents.
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Affiliation(s)
- Axelle Y. Kern
- University of Strasbourg, INSERM, EFS Grand-Est, BPPS UMR_S1255, FMTS, F-67065 Strasbourg, France
| | - Yevgeniy Kreinin
- Department of Biomedical Engineering Technion, Israel Institute of Technology, Haifa, Israel
| | - Lise Charle
- University of Strasbourg, INSERM, EFS Grand-Est, BPPS UMR_S1255, FMTS, F-67065 Strasbourg, France
| | - Mark Epshrein
- Department of Biomedical Engineering Technion, Israel Institute of Technology, Haifa, Israel
| | - Netanel Korin
- Department of Biomedical Engineering Technion, Israel Institute of Technology, Haifa, Israel
| | - Pierre H. Mangin
- University of Strasbourg, INSERM, EFS Grand-Est, BPPS UMR_S1255, FMTS, F-67065 Strasbourg, France
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Cecen B, Hassan S, Li X, Zhang YS. Smart Biomaterials in Biomedical Applications: Current Advances and Possible Future Directions. Macromol Biosci 2024; 24:e2200550. [PMID: 37728061 DOI: 10.1002/mabi.202200550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 09/02/2023] [Indexed: 09/21/2023]
Abstract
Smart biomaterials with the capacity to alter their properties in response to an outside stimulus or from within the environment around them have picked up significant attention in the biomedical community. This is primarily due to the interest in their biomedical applications that may be anticipated from them in a considerable number of dynamic structures and devices. Shape-memory materials are some of these materials that have been exclusively used for these applications. They exhibit unique structural reconfiguration features they adapt as per the provided environmental conditions and can be designed for their enhanced biocompatibility. Numerous research initiatives have focused on these smart biocompatible materials over the last few decades to enhance their biomedical applications. Shape-memory materials play a significant role in this regard to meet new surgical and medical devices' requirements for special features and utility cases. Because of the favorable design variety, different biomedical shape-memory materials can be developed by modifying their chemical and physical behaviors to accommodate the desired requirements. In this review, recent advances and characteristics of smart biomaterials for biomedical applications are described. The authors also discuss about their clinical translations in tissue engineering, drug delivery, and medical devices.
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Affiliation(s)
- Berivan Cecen
- Department of Mechanical Engineering, Rowan University, Glassboro, New Jersey, 08028, USA
- Department of Biomedical Engineering, Rowan University, Glassboro, New Jersey, 08028, USA
| | - Shabir Hassan
- Department of Biology, Khalifa University, Main Campus, Abu Dhabi, 127788, UAE
- Advanced Materials Chemistry Center (AMCC), Khalifa University, SAN Campus, Abu Dhabi, 127788, UAE
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA, 02139, USA
| | - Xin Li
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA, 02139, USA
| | - Yu Shrike Zhang
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA, 02139, USA
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Kokkinidou D, Kaliviotis E, Shammas C, Anayiotos A, Kapnisis K. An in vivo investigation on the effects of stent implantation on hematological and hemorheological parameters. Clin Hemorheol Microcirc 2024; 87:39-53. [PMID: 38143339 DOI: 10.3233/ch-231921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2023]
Abstract
BACKGROUND Even though cardiovascular stenting is widely used for the treatment of coronary artery disease, information on how it can affect the hematological and hemorheological profile is scarce in the literature. Most of the work on this issue is based on theoretical or computational fluid dynamics models, lacking in-depth in vitro and in vivo experimental verification. OBJECTIVE This work investigates, in an in vivo setting, the effects of stenting and the implantation time-course on hematological and hemorheological parameters that could potentially compromise the device's functionality and longevity. METHODS Custom-made self-expanding nitinol stents were implanted in the common carotid artery of male CD1 mice. Whole blood samples were collected from control (non-stented) and stented animals at 5 and 10 weeks post-implantation. Hematological measurements and blood viscosity, red blood cell aggregation, and deformability were performed using standard techniques. RESULTS Implant-induced changes were observed in some of the hematological and hemorheological indices. Blood viscosity seems to have been negatively affected by an increased hematocrit and reduced RBC deformability, at 10 weeks post-implantation, despite a slight decrease in RBC aggregation. CONCLUSIONS Although the alterations observed may be the result of the peri-implant inflammatory response, the physiological consequences due to hemorheological changes need to be further investigated.
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Affiliation(s)
- D Kokkinidou
- Department of Mechanical Engineering and Material Science and Engineering, Cyprus University of Technology, Limassol, Cyprus
| | - E Kaliviotis
- Department of Mechanical Engineering and Material Science and Engineering, Cyprus University of Technology, Limassol, Cyprus
| | - C Shammas
- BIOANALYSIS Clinical Laboratory, Limassol, Cyprus
| | - A Anayiotos
- Department of Mechanical Engineering and Material Science and Engineering, Cyprus University of Technology, Limassol, Cyprus
| | - K Kapnisis
- Department of Mechanical Engineering and Material Science and Engineering, Cyprus University of Technology, Limassol, Cyprus
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Malisz K, Świeczko-Żurek B, Sionkowska A. Preparation and Characterization of Diamond-like Carbon Coatings for Biomedical Applications-A Review. MATERIALS (BASEL, SWITZERLAND) 2023; 16:ma16093420. [PMID: 37176304 PMCID: PMC10179951 DOI: 10.3390/ma16093420] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 04/19/2023] [Accepted: 04/25/2023] [Indexed: 05/15/2023]
Abstract
Diamond-like carbon (DLC) films are generally used in biomedical applications, mainly because of their tribological and chemical properties that prevent the release of substrate ions, extend the life cycle of the material, and promote cell growth. The unique properties of the coating depend on the ratio of the sp3/sp2 phases, where the sp2 phase provides coatings with a low coefficient of friction and good electrical conductivity, while the share of the sp3 phase determines the chemical inertness, high hardness, and resistance to tribological wear. DLC coatings are characterized by high hardness, low coefficient of friction, high corrosion resistance, and biocompatibility. These properties make them attractive as potential wear-resistant coatings in many compelling applications, including optical, mechanical, microelectronic, and biomedical applications. Another great advantage of DLC coatings is that they can be deposited at low temperatures on a variety of substrates and can thus be used to coat heat-sensitive materials, such as polymers. Coating deposition techniques are constantly being improved; techniques based on vacuum environment reactions are mainly used, such as physical vapor deposition (PVD) and chemical vapor deposition (CVD). This review summarizes the current knowledge and research regarding diamond-like carbon coatings.
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Affiliation(s)
- Klaudia Malisz
- Department of Biomaterials Technology, Faculty of Mechanical Engineering and Ship Technology, Gdansk University of Technology, Gabriela Narutowicza 11/12, 80-229 Gdansk, Poland
| | - Beata Świeczko-Żurek
- Department of Biomaterials Technology, Faculty of Mechanical Engineering and Ship Technology, Gdansk University of Technology, Gabriela Narutowicza 11/12, 80-229 Gdansk, Poland
| | - Alina Sionkowska
- Faculty of Chemistry, Nicolaus Copernicus University in Toruń, Gagarina 7, 87-100 Torun, Poland
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John SE, Donegan S, Scordas TC, Qi W, Sharma P, Liyanage K, Wilson S, Birchall I, Ooi A, Oxley TJ, May CN, Grayden DB, Opie NL. Vascular remodeling in sheep implanted with endovascular neural interface. J Neural Eng 2022; 19. [PMID: 36240737 DOI: 10.1088/1741-2552/ac9a77] [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: 09/01/2022] [Accepted: 10/14/2022] [Indexed: 12/24/2022]
Abstract
Objective.The aim of this work was to assess vascular remodeling after the placement of an endovascular neural interface (ENI) in the superior sagittal sinus (SSS) of sheep. We also assessed the efficacy of neural recording using an ENI.Approach.The study used histological analysis to assess the composition of the foreign body response. Micro-CT images were analyzed to assess the profiles of the foreign body response and create a model of a blood vessel. Computational fluid dynamic modeling was performed on a reconstructed blood vessel to evaluate the blood flow within the vessel. Recording of brain activity in sheep was used to evaluate efficacy of neural recordings.Main results.Histological analysis showed accumulated extracellular matrix material in and around the implanted ENI. The extracellular matrix contained numerous macrophages, foreign body giant cells, and new vascular channels lined by endothelium. Image analysis of CT slices demonstrated an uneven narrowing of the SSS lumen proportional to the stent material within the blood vessel. However, the foreign body response did not occlude blood flow. The ENI was able to record epileptiform spiking activity with distinct spike morphologies.Significance. This is the first study to show high-resolution tissue profiles, the histological response to an implanted ENI and blood flow dynamic modeling based on blood vessels implanted with an ENI. The results from this study can be used to guide surgical planning and future ENI designs; stent oversizing parameters to blood vessel diameter should be considered to minimize detrimental vascular remodeling.
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Affiliation(s)
- Sam E John
- The Department of Biomedical Engineering, The University of Melbourne, Victoria, Australia.,Florey Institute of Neuroscience and Mental Health, Victoria, Australia
| | - Sam Donegan
- The Department of Medicine, University of Melbourne, Victoria, Australia
| | - Theodore C Scordas
- The Department of Medicine, University of Melbourne, Victoria, Australia
| | - Weijie Qi
- The Department of Biomedical Engineering, The University of Melbourne, Victoria, Australia.,Florey Institute of Neuroscience and Mental Health, Victoria, Australia
| | - Prayshita Sharma
- The Department of Biomedical Engineering, The University of Melbourne, Victoria, Australia
| | - Kishan Liyanage
- The Department of Medicine, University of Melbourne, Victoria, Australia
| | - Stefan Wilson
- The Department of Medicine, University of Melbourne, Victoria, Australia
| | - Ian Birchall
- Florey Institute of Neuroscience and Mental Health, Victoria, Australia
| | - Andrew Ooi
- The Department of Mechanical Engineering, University of Melbourne, Victoria, Australia
| | - Thomas J Oxley
- The Department of Medicine, University of Melbourne, Victoria, Australia.,Florey Institute of Neuroscience and Mental Health, Victoria, Australia
| | - Clive N May
- Florey Institute of Neuroscience and Mental Health, Victoria, Australia
| | - David B Grayden
- The Department of Biomedical Engineering, The University of Melbourne, Victoria, Australia.,Graeme Clark Institute for Biomedical Engineering, University of Melbourne, Victoria, Australia
| | - Nicholas L Opie
- The Department of Medicine, University of Melbourne, Victoria, Australia.,Florey Institute of Neuroscience and Mental Health, Victoria, Australia
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Graphene for Antimicrobial and Coating Application. Int J Mol Sci 2022; 23:ijms23010499. [PMID: 35008923 PMCID: PMC8745297 DOI: 10.3390/ijms23010499] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 12/28/2021] [Accepted: 12/30/2021] [Indexed: 12/22/2022] Open
Abstract
Graphene is a versatile compound with several outstanding properties, providing a combination of impressive surface area, high strength, thermal and electrical properties, with a wide array of functionalization possibilities. This review aims to present an introduction of graphene and presents a comprehensive up-to-date review of graphene as an antimicrobial and coating application in medicine and dentistry. Available articles on graphene for biomedical applications were reviewed from January 1957 to August 2020) using MEDLINE/PubMed, Web of Science, and ScienceDirect. The selected articles were included in this study. Extensive research on graphene in several fields exists. However, the available literature on graphene-based coatings in dentistry and medical implant technology is limited. Graphene exhibits high biocompatibility, corrosion prevention, antimicrobial properties to prevent the colonization of bacteria. Graphene coatings enhance adhesion of cells, osteogenic differentiation, and promote antibacterial activity to parts of titanium unaffected by the thermal treatment. Furthermore, the graphene layer can improve the surface properties of implants which can be used for biomedical applications. Hence, graphene and its derivatives may hold the key for the next revolution in dental and medical technology.
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Gegenschatz-Schmid K, Buzzi S, Grossmann J, Roschitzki B, Urbanet R, Heuberger R, Glück D, Zucker A, Ehrbar M. Reduced thrombogenicity of surface-treated Nitinol implants steered by altered protein adsorption. Acta Biomater 2022; 137:331-345. [PMID: 34673227 DOI: 10.1016/j.actbio.2021.10.022] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 10/11/2021] [Accepted: 10/13/2021] [Indexed: 12/19/2022]
Abstract
Blood-contacting medical implants made of Nitinol and other titanium alloys, such as neurovascular flow diverters and peripheral stents, have the disadvantage of being highly thrombogenic. This makes the use of systemic (dual) anti-platelet/anticoagulant therapies inevitable with related risks of device thrombosis, bleeding and other complications. Meeting the urgent clinical demand for a less thrombogenic Nitinol surface, we describe here a simple treatment of standard, commercially available Nitinol that renders its surface ultra-hydrophilic and functionalized with phosphate ions. The efficacy of this treatment was assessed by comparing standard and surface-treated Nitinol disks and braids, equivalent to flow diverters. Static and dynamic (Chandler loop) blood incubation tests showed a drastic reduction of thrombus formation on treated devices. Surface chemistry and proteomic analysis indicated a key role of phosphate and calcium ions in steering blood protein adsorption and avoiding coagulation cascade activation and platelet adhesion. A good endothelialization of the surface confirmed the biocompatibility of the treated surface. STATEMENT OF SIGNIFICANCE: Titanium alloys such as Nitinol are biocompatible and show favorable mechanical properties, which led to their widespread use in medical implants. However, in contact with blood their surface triggers the activation of the intrinsic coagulation cascade, which may result in catastrophic thrombotic events. The presented results showed that a phosphate functionalization of the titanium oxide surface suppresses the activation of both coagulation cascade and platelets, avoiding the subsequent formation of a blood clot. This novel approach has therefore a great potential for mitigating the risks associated to either thrombosis or bleeding complications (due to systemic anticoagulation) in patients with cardiovascular implants.
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Mühl-Benninghaus R, Fries F, Kießling M, Tomori T, Krajewski S, Simgen A, Bauer S, Hey N, Brynda E, Taborska J, Riedel T, Reith W, Cattaneo G, Brochhausen C. Vascular Response on a Novel Fibrin-Based Coated Flow Diverter. Cardiovasc Intervent Radiol 2021; 45:236-243. [PMID: 34913987 PMCID: PMC8807434 DOI: 10.1007/s00270-021-03007-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Accepted: 11/04/2021] [Indexed: 11/30/2022]
Abstract
Purpose Due to thromboembolic complications and in-stent-stenosis after flow diverter (FD) treatment, the long-term use of dual antiplatelet treatment (DAPT) is mandatory. The tested nano-coating has been shown to reduce material thrombogenicity and promote endothelial cell proliferation in vitro. We compared the biocompatibility of coated (Derivo Heal) and non-coated (Derivo bare) FDs with DAPT in an animal model. Methods Derivo® bare (n = 10) and Derivo® Heal (n = 10) FD were implanted in the common carotid arteries (CCAs) of New Zealand white rabbits. One additional FD, alternately a Derivo bare (n = 5) or Derivo Heal (n = 5), was implanted in the abdominal aorta (AA) for assessment of the patency of branch arteries. Histopathological examinations were performed after 28 days. Angiography was performed before and after FD implantation and at follow-up. Results Statistical analysis of the included specimens showed complete endothelialization of all FDs with no significant differences in neointima thickness between Derivo® bare and Derivo® Heal (CCA: p = 0.91; AA: p = 0.59). A significantly reduced number of macrophages in the vessel wall of the Derivo Heal was observed for the CCA (p = 0.02), and significantly reduced fibrin and platelet deposition on the surface of the Derivo Heal was observed for the AA. All branch arteries of the stented aorta remained patent. Conclusion In this animal model, the novel fibrin-based coated FD showed a similar blood and tissue compatibility as the non-coated FD.
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Affiliation(s)
- Ruben Mühl-Benninghaus
- Department of Neuroradiology, Saarland University Hospital, Kirrberger Strasse, 66424, Homburg, Germany.
| | - Frederik Fries
- Department of Neuroradiology, Saarland University Hospital, Kirrberger Strasse, 66424, Homburg, Germany
| | - Mara Kießling
- Institute of Pathology, University of Regensburg, Regensburg, Germany
| | - Toshiki Tomori
- Department of Neuroradiology, Saarland University Hospital, Kirrberger Strasse, 66424, Homburg, Germany
| | - Stefanie Krajewski
- Department of Thoracic, Cardiac and Vascular Surgery, University Hospital Tuebingen, Tübingen, Germany
| | - Andreas Simgen
- Department of Neuroradiology, Saarland University Hospital, Kirrberger Strasse, 66424, Homburg, Germany
| | | | | | - Eduard Brynda
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Prague, Czech Republic
| | - Johanka Taborska
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Prague, Czech Republic
| | - Tomáš Riedel
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Prague, Czech Republic
| | - Wolfgang Reith
- Department of Neuroradiology, Saarland University Hospital, Kirrberger Strasse, 66424, Homburg, Germany
| | - Giorgio Cattaneo
- Institute for Biomedical Engineering, University of Stuttgart, Stuttgart, Germany
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Kuchinka J, Willems C, Telyshev DV, Groth T. Control of Blood Coagulation by Hemocompatible Material Surfaces-A Review. Bioengineering (Basel) 2021; 8:bioengineering8120215. [PMID: 34940368 PMCID: PMC8698751 DOI: 10.3390/bioengineering8120215] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Revised: 12/10/2021] [Accepted: 12/12/2021] [Indexed: 11/16/2022] Open
Abstract
Hemocompatibility of biomaterials in contact with the blood of patients is a prerequisite for the short- and long-term applications of medical devices such as cardiovascular stents, artificial heart valves, ventricular assist devices, catheters, blood linings and extracorporeal devices such as artificial kidneys (hemodialysis), extracorporeal membrane oxygenation (ECMO) and cardiopulmonary bypass. Although lower blood compatibility of materials and devices can be handled with systemic anticoagulation, its side effects, such as an increased bleeding risk, make materials that have a better hemocompatibility highly desirable, particularly in long-term applications. This review provides a short overview on the basic mechanisms of blood coagulation including plasmatic coagulation and blood platelets, as well as the activation of the complement system. Furthermore, a survey on concepts for tailoring the blood response of biomaterials to improve the hemocompatibility of medical devices is given which covers different approaches that either inhibit interaction of material surfaces with blood components completely or control the response of the coagulation system, blood platelets and leukocytes.
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Affiliation(s)
- Janna Kuchinka
- Department Biomedical Materials, Institute of Pharmacy, Martin Luther University Halle-Wittenberg, 06120 Halle (Saale), Germany; (J.K.); (C.W.)
| | - Christian Willems
- Department Biomedical Materials, Institute of Pharmacy, Martin Luther University Halle-Wittenberg, 06120 Halle (Saale), Germany; (J.K.); (C.W.)
| | - Dmitry V. Telyshev
- Institute of Biomedical Systems, National Research University of Electronic Technology, Zelenograd, 124498 Moscow, Russia;
- Laboratory of Biomedical Nanotechnologies, Institute of Bionic Technologies and Engineering, I.M. Sechenov First Moscow State University, 119991 Moscow, Russia
| | - Thomas Groth
- Department Biomedical Materials, Institute of Pharmacy, Martin Luther University Halle-Wittenberg, 06120 Halle (Saale), Germany; (J.K.); (C.W.)
- Laboratory of Biomedical Nanotechnologies, Institute of Bionic Technologies and Engineering, I.M. Sechenov First Moscow State University, 119991 Moscow, Russia
- Interdisciplinary Center of Materials Science, Martin Luther University Halle-Wittenberg, 06120 Halle (Saale), Germany
- Correspondence: ; Tel.: +49-3455528460
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Vasudevan B, Chang Q, Wang B, Huang S, Sui Y, Zhu W, Fan Q, Song Y. Effect of intracellular uptake of nanoparticle-encapsulated trehalose on the hemocompatibility of allogeneic valves in the VS83 vitrification protocol. Nanobiomedicine (Rij) 2021; 7:1849543520983173. [PMID: 33447299 PMCID: PMC7780325 DOI: 10.1177/1849543520983173] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Accepted: 12/03/2020] [Indexed: 11/16/2022] Open
Abstract
Trehalose is a disaccharide molecule consisting of two molecules of glucose. Industrially, trehalose is derived from corn starch and utilized as a drug. This study aims to examine whether the integration of nanoparticle-encapsulated trehalose to the Ice-Free Cryopreservation (IFC) method for preserving heart valves has better cell viability, benefits to protect the extracellular matrix (ECM), and reduce immune response after storage. For the experiment to be carried out, we obtained materials, and the procedures were carried out in the following manner. The initial step was the preparation of hydroxyapatite nanoparticles, followed by precipitation to acquire Apatite colloidal suspensions. Animals were obtained, and their tissue isolation and grouping were done ethically. All samples were then divided into four groups, Control group, Conventional Frozen Cryopreservation (CFC) group, IFC group, and IFC + T (IFC with the addition of 0.2 M nanoparticle-encapsulated Trehalose) group. Histological analysis was carried out via H&E staining, ECM components were stained with Modified Weigert staining, and the Gomori Ammonia method was used to stain reticular fibers. Alamar Blue assay was utilized to assess cell viability. Hemocompatibility was evaluated, and samples were processed for immunohistochemistry (TNFα and IL-10). Hemocompatibility was quantified using Terminal Complement Complex (TCC) and Neutrophil elastase (NE) as an indicator. The results of the H&E staining revealed less formation of extracellular ice crystals and intracellular vacuoles in the IFC + T group compared with all other groups. The CFC group’s cell viability showed better viability than the IFC group, but the highest viability was exhibited in the IFC + T group (70.96 ± 2.53, P < 0.0001, n = 6). In immunohistochemistry, TNFα levels were lowest in both IFC and IFC + T group, and IL-10 expression had significantly reduced in IFC and IFC + T group. The results suggested that the nanoparticle encapsulated trehalose did not show significant hemocompatibility issues on the cryopreserved heart valves.
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Affiliation(s)
| | - Qing Chang
- Affiliated Hospital of Medical College, Qingdao University, Qingdao, China
| | - Bin Wang
- Affiliated Hospital of Medical College, Qingdao University, Qingdao, China
| | - Siyang Huang
- Affiliated Hospital of Medical College, Qingdao University, Qingdao, China
| | - Yulong Sui
- Affiliated Hospital of Medical College, Qingdao University, Qingdao, China
| | - Wenjie Zhu
- Affiliated Hospital of Medical College, Qingdao University, Qingdao, China
| | - Qing Fan
- Affiliated Hospital of Medical College, Qingdao University, Qingdao, China
| | - Yisheng Song
- Affiliated Hospital of Medical College, Qingdao University, Qingdao, China
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12
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Holman H, Kavarana MN, Rajab TK. Smart materials in cardiovascular implants: Shape memory alloys and shape memory polymers. Artif Organs 2020; 45:454-463. [PMID: 33107042 DOI: 10.1111/aor.13851] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 10/03/2020] [Accepted: 10/19/2020] [Indexed: 12/12/2022]
Abstract
Smart materials have intrinsic properties that change in a controlled fashion in response to external stimuli. Currently, the only smart materials with a significant clinical impact in cardiovascular implant design are shape memory alloys, particularly Nitinol. Recent prodigious progress in material science has resulted in the development of sophisticated shape memory polymers. In this article, we have reviewed the literature and outline the characteristics, advantages, and disadvantages of shape memory alloys and shape memory polymers which are relevant to clinical cardiovascular applications, and describe the potential of these smart materials for applications in coronary stents and transcatheter valves.
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Affiliation(s)
- Heather Holman
- Division of Cardiothoracic Surgery, Medical University of South Carolina, Charleston, SC, USA
| | - Minoo Naozer Kavarana
- Division of Cardiothoracic Surgery, Medical University of South Carolina, Charleston, SC, USA
| | - Taufiek Konrad Rajab
- Division of Cardiothoracic Surgery, Medical University of South Carolina, Charleston, SC, USA
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Bioclickable and mussel adhesive peptide mimics for engineering vascular stent surfaces. Proc Natl Acad Sci U S A 2020; 117:16127-16137. [PMID: 32601214 DOI: 10.1073/pnas.2003732117] [Citation(s) in RCA: 75] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Thrombogenic reaction, aggressive smooth muscle cell (SMC) proliferation, and sluggish endothelial cell (EC) migration onto bioinert metal vascular stents make poststenting reendothelialization a dilemma. Here, we report an easy to perform, biomimetic surface engineering strategy for multiple functionalization of metal vascular stents. We first design and graft a clickable mussel-inspired peptide onto the stent surface via mussel-inspired adhesion. Then, two vasoactive moieties [i.e., the nitric-oxide (NO)-generating organoselenium (SeCA) and the endothelial progenitor cell (EPC)-targeting peptide (TPS)] are clicked onto the grafted surfaces via bioorthogonal conjugation. We optimize the blood and vascular cell compatibilities of the grafted surfaces through changing the SeCA/TPS feeding ratios. At the optimal ratio of 2:2, the surface-engineered stents demonstrate superior inhibition of thrombosis and SMC migration and proliferation, promotion of EPC recruitment, adhesion, and proliferation, as well as prevention of in-stent restenosis (ISR). Overall, our biomimetic surface engineering strategy represents a promising solution to address clinical complications of cardiovascular stents and other blood-contacting metal materials.
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Xiao Y, Wang W, Tian X, Tan X, Yang T, Gao P, Xiong K, Tu Q, Wang M, Maitz MF, Huang N, Pan G, Yang Z. A Versatile Surface Bioengineering Strategy Based on Mussel-Inspired and Bioclickable Peptide Mimic. RESEARCH (WASHINGTON, D.C.) 2020; 2020:7236946. [PMID: 32676588 PMCID: PMC7334800 DOI: 10.34133/2020/7236946] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Accepted: 06/07/2020] [Indexed: 11/07/2022]
Abstract
In this work, we present a versatile surface engineering strategy by the combination of mussel adhesive peptide mimicking and bioorthogonal click chemistry. The main idea reflected in this work derived from a novel mussel-inspired peptide mimic with a bioclickable azide group (i.e., DOPA4-azide). Similar to the adhesion mechanism of the mussel foot protein (i.e., covalent/noncovalent comediated surface adhesion), the bioinspired and bioclickable peptide mimic DOPA4-azide enables stable binding on a broad range of materials, such as metallic, inorganic, and organic polymer substrates. In addition to the material universality, the azide residues of DOPA4-azide are also capable of a specific conjugation of dibenzylcyclooctyne- (DBCO-) modified bioactive ligands through bioorthogonal click reaction in a second step. To demonstrate the applicability of this strategy for diversified biofunctionalization, we bioorthogonally conjugated several typical bioactive molecules with DBCO functionalization on different substrates to fabricate functional surfaces which fulfil essential requirements of biomedically used implants. For instance, antibiofouling, antibacterial, and antithrombogenic properties could be easily applied to the relevant biomaterial surfaces, by grafting antifouling polymer, antibacterial peptide, and NO-generating catalyst, respectively. Overall, the novel surface bioengineering strategy has shown broad applicability for both the types of substrate materials and the expected biofunctionalities. Conceivably, the "clean" molecular modification of bioorthogonal chemistry and the universality of mussel-inspired surface adhesion may synergically provide a versatile surface bioengineering strategy for a wide range of biomedical materials.
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Affiliation(s)
- Yu Xiao
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China
| | - Wenxuan Wang
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China
| | - Xiaohua Tian
- Institute for Advanced Materials, School of Materials Science and Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China
| | - Xing Tan
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China
| | - Tong Yang
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China
| | - Peng Gao
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China
| | - Kaiqing Xiong
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China
| | - Qiufen Tu
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China
| | - Miao Wang
- Institute for Advanced Materials, School of Materials Science and Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China
| | - Manfred F. Maitz
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China
- Max Bergmann Center of Biomaterials, Leibniz Institute of Polymer Research Dresden, Hohe Strasse 6, 01069 Dresden, Germany
| | - Nan Huang
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China
| | - Guoqing Pan
- Institute for Advanced Materials, School of Materials Science and Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China
| | - Zhilu Yang
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China
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Braune S, Latour RA, Reinthaler M, Landmesser U, Lendlein A, Jung F. In Vitro Thrombogenicity Testing of Biomaterials. Adv Healthc Mater 2019; 8:e1900527. [PMID: 31612646 DOI: 10.1002/adhm.201900527] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Revised: 08/15/2019] [Indexed: 12/29/2022]
Abstract
The short- and long-term thrombogenicity of implant materials is still unpredictable, which is a significant challenge for the treatment of cardiovascular diseases. A knowledge-based approach for implementing biofunctions in materials requires a detailed understanding of the medical device in the biological system. In particular, the interplay between material and blood components/cells as well as standardized and commonly acknowledged in vitro test methods allowing a reproducible categorization of the material thrombogenicity requires further attention. Here, the status of in vitro thrombogenicity testing methods for biomaterials is reviewed, particularly taking in view the preparation of test materials and references, the selection and characterization of donors and blood samples, the prerequisites for reproducible approaches and applied test systems. Recent joint approaches in finding common standards for a reproducible testing are summarized and perspectives for a more disease oriented in vitro thrombogenicity testing are discussed.
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Affiliation(s)
- Steffen Braune
- Institute of Biomaterial Science and Berlin‐Brandenburg Centre for Regenerative Therapies (BCRT)Helmholtz‐Zentrum Geesthacht Kantstrasse 55 14513 Teltow Germany
| | - Robert A. Latour
- Rhodes Engineering Research CenterDepartment of BioengineeringClemson University Clemson SC 29634 USA
| | - Markus Reinthaler
- Institute of Biomaterial Science and Berlin‐Brandenburg Centre for Regenerative Therapies (BCRT)Helmholtz‐Zentrum Geesthacht Kantstrasse 55 14513 Teltow Germany
- Department for CardiologyCharité UniversitätsmedizinCampus Benjamin Franklin Hindenburgdamm 30 12203 Berlin Germany
| | - Ulf Landmesser
- Department for CardiologyCharité UniversitätsmedizinCampus Benjamin Franklin Hindenburgdamm 30 12203 Berlin Germany
| | - Andreas Lendlein
- Institute of Biomaterial Science and Berlin‐Brandenburg Centre for Regenerative Therapies (BCRT)Helmholtz‐Zentrum Geesthacht Kantstrasse 55 14513 Teltow Germany
- Institute of ChemistryUniversity of Potsdam Karl‐Liebknecht‐Strasse 24‐25 14476 Potsdam Germany
- Helmholtz Virtual Institute “Multifunctional Biomaterials for Medicine”Helmholtz‐Zentrum Geesthacht Kantstrasse 55 14513 Teltow Germany
| | - Friedrich Jung
- Institute of Biomaterial Science and Berlin‐Brandenburg Centre for Regenerative Therapies (BCRT)Helmholtz‐Zentrum Geesthacht Kantstrasse 55 14513 Teltow Germany
- Helmholtz Virtual Institute “Multifunctional Biomaterials for Medicine”Helmholtz‐Zentrum Geesthacht Kantstrasse 55 14513 Teltow Germany
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Henkes H, Bhogal P, Aguilar Pérez M, Lenz-Habijan T, Bannewitz C, Peters M, Sengstock C, Ganslandt O, Lylyk P, Monstadt H. Anti-thrombogenic coatings for devices in neurointerventional surgery: Case report and review of the literature. Interv Neuroradiol 2019; 25:619-627. [PMID: 31248313 PMCID: PMC6820329 DOI: 10.1177/1591019919858000] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND Stent-assisted coiling and extra-saccular flow diversion require dual anti-platelet therapy due to the thrombogenic properties of the implants. While both methods are widely accepted, thromboembolic complications and the detrimental effects of dual anti-platelet therapy remain a concern. Anti-thrombogenic surface coatings aim to solve both of these issues. Current developments are discussed within the framework of an actual clinical case. CASE DESCRIPTION A 33-year-old male patient lost consciousness while doing sport and was administered 500 mg acetylsalicylic acid on site. Computed tomography revealed a massive subarachnoid haemorrhage, and digital subtraction angiography showed an aneurysm of the right middle cerebral artery. Stent-assisted coiling using a neck bridging device with a hydrophilic coating (pCONUS_HPC) was considered as an appropriate approach. Another 500 mg acetylsalicylic acid IV was given. After the single anti-platelet therapy was seen to be effective, a pCONUS_HPC was implanted, and the aneurysm sac subsequently fully occluded using coils. No thrombus formation was encountered. During the following days, 2 × 500 mg acetylsalicylic acid IV daily were required to maintain single anti-platelet therapy, monitored by frequent response testing. Follow-up digital subtraction angiography after 13 days confirmed the occlusion of the aneurysm and the patency of the middle cerebral artery. CONCLUSION A variety of ways to reduce the thrombogenicity of neurovascular stents is discussed. Hydrophilic surface coatings are a valid concept to improve the haemocompatibility of neurovascular implants while avoiding the use of dual anti-platelet therapy. Phosphorylcholine and phenox hydrophilic polymer coating are currently the most promising candidates. This concept is supported by anecdotal experience. However, formalised registries and randomised trials are currently being established.
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Affiliation(s)
- Hans Henkes
- Neuroradiological Clinic, Klinikum Stuttgart, Stuttgart, Germany.,Medical Faculty, University Duisburg-Essen, Essen, Germany
| | - Pervinder Bhogal
- Department of Interventional Neuroradiology, The Royal London Hospital, London, UK
| | | | | | | | - Marcus Peters
- Experimental Pneumology, Medical Faculty, Ruhr University, Bochum, Germany
| | - Christina Sengstock
- Surgical Research, BG University Hospital Bergmannsheil Bochum, Ruhr University, Bochum, Germany
| | | | - Pedro Lylyk
- Clinica La Sagrada Familia, ENERI, Buenos Aires, Argentina
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Zhao J, Bai L, Muhammad K, Ren XK, Guo J, Xia S, Zhang W, Feng Y. Construction of Hemocompatible and Histocompatible Surface by Grafting Antithrombotic Peptide ACH11 and Hydrophilic PEG. ACS Biomater Sci Eng 2019; 5:2846-2857. [DOI: 10.1021/acsbiomaterials.9b00431] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Jing Zhao
- School of Chemical Engineering and Technology, Tianjin University, Yaguan Road 135, Tianjin 300350, China
- Collaborative Innovation Center of Chemical Science and Chemical Engineering (Tianjin), Weijin Road 92, Tianjin 300072, China
| | - Lingchuang Bai
- School of Chemical Engineering and Technology, Tianjin University, Yaguan Road 135, Tianjin 300350, China
- Collaborative Innovation Center of Chemical Science and Chemical Engineering (Tianjin), Weijin Road 92, Tianjin 300072, China
| | - Khan Muhammad
- School of Chemical Engineering and Technology, Tianjin University, Yaguan Road 135, Tianjin 300350, China
| | - Xiang-kui Ren
- School of Chemical Engineering and Technology, Tianjin University, Yaguan Road 135, Tianjin 300350, China
- Collaborative Innovation Center of Chemical Science and Chemical Engineering (Tianjin), Weijin Road 92, Tianjin 300072, China
| | - Jintang Guo
- School of Chemical Engineering and Technology, Tianjin University, Yaguan Road 135, Tianjin 300350, China
- Collaborative Innovation Center of Chemical Science and Chemical Engineering (Tianjin), Weijin Road 92, Tianjin 300072, China
| | - Shihai Xia
- Department of Hepatopancreatobiliary and Splenic Medicine, Affiliated Hospital, Logistics University of People’s Armed Police Force, 220 Chenglin Road, Tianjin 300162, China
| | - Wencheng Zhang
- Department of Physiology and Pathophysiology, Logistics University of Chinese People’s Armed Police Force, Tianjin 300309, China
| | - Yakai Feng
- School of Chemical Engineering and Technology, Tianjin University, Yaguan Road 135, Tianjin 300350, China
- Collaborative Innovation Center of Chemical Science and Chemical Engineering (Tianjin), Weijin Road 92, Tianjin 300072, China
- Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin 300072, China
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Lipinski MJ, Acampado E, Cheng Q, Adams L, Torii S, Gai J, Torguson R, Hellinga DG, Joner M, Harder C, Zumstein P, Finn AV, Kolodgie FD, Virmani R, Waksman R. Comparison of acute thrombogenicity for magnesium versus stainless steel stents in a porcine arteriovenous shunt model. EUROINTERVENTION 2019; 14:1420-1427. [DOI: 10.4244/eij-d-17-00958] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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19
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Shi J, Chen S, Wang L, Zhang X, Gao J, Jiang L, Tang D, Zhang L, Midgley A, Kong D, Wang S. Rapid endothelialization and controlled smooth muscle regeneration by electrospun heparin‐loaded polycaprolactone/gelatin hybrid vascular grafts. J Biomed Mater Res B Appl Biomater 2018; 107:2040-2049. [DOI: 10.1002/jbm.b.34295] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Revised: 11/12/2018] [Accepted: 11/23/2018] [Indexed: 12/13/2022]
Affiliation(s)
- Jie Shi
- Key Laboratory of Bioactive Materials for Ministry of Education, College of Life SciencesNankai University Tianjin 300071 China
| | - Siyuan Chen
- Key Laboratory of Bioactive Materials for Ministry of Education, College of Life SciencesNankai University Tianjin 300071 China
| | - Lina Wang
- Key Laboratory of Bioactive Materials for Ministry of Education, College of Life SciencesNankai University Tianjin 300071 China
| | - Xiangyun Zhang
- Key Laboratory of Bioactive Materials for Ministry of Education, College of Life SciencesNankai University Tianjin 300071 China
| | - Jingchen Gao
- Key Laboratory of Bioactive Materials for Ministry of Education, College of Life SciencesNankai University Tianjin 300071 China
| | - Li Jiang
- Key Laboratory of Bioactive Materials for Ministry of Education, College of Life SciencesNankai University Tianjin 300071 China
| | - Di Tang
- Key Laboratory of Bioactive Materials for Ministry of Education, College of Life SciencesNankai University Tianjin 300071 China
| | - Lin Zhang
- Key Laboratory of Bioactive Materials for Ministry of Education, College of Life SciencesNankai University Tianjin 300071 China
| | - Adam Midgley
- Key Laboratory of Bioactive Materials for Ministry of Education, College of Life SciencesNankai University Tianjin 300071 China
| | - Deling Kong
- Key Laboratory of Bioactive Materials for Ministry of Education, College of Life SciencesNankai University Tianjin 300071 China
| | - Shufang Wang
- Key Laboratory of Bioactive Materials for Ministry of Education, College of Life SciencesNankai University Tianjin 300071 China
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Yuan B, Zhu M, Chung CY. Biomedical Porous Shape Memory Alloys for Hard-Tissue Replacement Materials. MATERIALS (BASEL, SWITZERLAND) 2018; 11:E1716. [PMID: 30217097 PMCID: PMC6164106 DOI: 10.3390/ma11091716] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2018] [Revised: 09/03/2018] [Accepted: 09/05/2018] [Indexed: 12/20/2022]
Abstract
Porous shape memory alloys (SMAs), including NiTi and Ni-free Ti-based alloys, are unusual materials for hard-tissue replacements because of their unique superelasticity (SE), good biocompatibility, and low elastic modulus. However, the Ni ion releasing for porous NiTi SMAs in physiological conditions and relatively low SE for porous Ni-free SMAs have delayed their clinic applications as implantable materials. The present article reviews recent research progresses on porous NiTi and Ni-free SMAs for hard-tissue replacements, focusing on two specific topics: (i) synthesis of porous SMAs with optimal porous structure, microstructure, mechanical, and biological properties; and, (ii) surface modifications that are designed to create bio-inert or bio-active surfaces with low Ni releasing and high biocompatibility for porous NiTi SMAs. With the advances of preparation technique, the porous SMAs can be tailored to satisfied porous structure with porosity ranging from 30% to 85% and different pore sizes. In addition, they can exhibit an elastic modulus of 0.4⁻15 GPa and SE of more than 2.5%, as well as good cell and tissue biocompatibility. As a result, porous SMAs had already been used in maxillofacial repairing, teeth root replacement, and cervical and lumbar vertebral implantation. Based on current research progresses, possible future directions are discussed for "property-pore structure" relationship and surface modification investigations, which could lead to optimized porous biomedical SMAs. We believe that porous SMAs with optimal porous structure and a bioactive surface layer are the most competitive candidate for short-term and long-term hard-tissue replacement materials.
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Affiliation(s)
- Bin Yuan
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China.
- Key Laboratory of Advanced Energy Storage Materials of Guangdong Province, Guangzhou 510640, China.
| | - Min Zhu
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China.
- Key Laboratory of Advanced Energy Storage Materials of Guangdong Province, Guangzhou 510640, China.
| | - Chi Yuen Chung
- Department of Physics & Materials Science, City University of Hong Kong, Kowloon, Hong Kong, China.
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Waksman R, Lipinski MJ, Acampado E, Cheng Q, Adams L, Torii S, Gai J, Torguson R, Hellinga DM, Westman PC, Joner M, Zumstein P, Kolodgie FD, Virmani R. Comparison of Acute Thrombogenicity for Metallic and Polymeric Bioabsorbable Scaffolds: Magmaris Versus Absorb in a Porcine Arteriovenous Shunt Model. Circ Cardiovasc Interv 2018; 10:CIRCINTERVENTIONS.116.004762. [PMID: 28801538 DOI: 10.1161/circinterventions.116.004762] [Citation(s) in RCA: 76] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Accepted: 06/19/2017] [Indexed: 11/16/2022]
Abstract
BACKGROUND A comparison in acute thrombogenicity between the Magmaris sirolimus-eluting bioabsorbable magnesium scaffold and the Absorb bioresorbable vascular scaffold has not been performed. This study assessed acute thrombogenicity of Magmaris compared with Absorb and the Orsiro hybrid drug-eluting stent in a porcine arteriovenous shunt model. METHODS AND RESULTS An ex vivo porcine carotid jugular arteriovenous shunt was established and connected to SYLGARD tubing containing the Magmaris, Absorb, and Orsiro scaffolds/stents and allowed to run in the shunt for a maximum of 1 hour. Twelve shunts (2 shunt runs per pig) were run comparing the 3 scaffolds in alternating order. Nested generalized linear mixed models were used to compare variables between scaffold groups while adjusting for variability between shunt runs. Confocal fluorescent microscopy costaining CD61/CD42b demonstrated that both Magmaris (3.0%) and Orsiro (4.6%) had less platelet coverage of the total scaffold compared with Absorb (21.8%). Scanning electron microscopy demonstrated significantly less thrombus deposition to Magmaris as a percentage of the total scaffold compared with Absorb (5.0% versus 16.1%, P=0.02). Magmaris had significantly less PM-1-positive neutrophil and CD14-positive monocyte adherence compared with both Orsiro and Absorb. Orsiro had significantly less monocyte deposition compared with Absorb. CONCLUSIONS Despite a similar scaffold strut thickness, the Magmaris sirolimus-eluting bioabsorbable magnesium scaffold was significantly less thrombogenic compared with the Absorb bioresorbable vascular scaffold in an ex vivo porcine arteriovenous shunt model. Further studies are needed to determine whether the reduced thrombogenicity of Magmaris will result in reductions in major cardiovascular events.
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Affiliation(s)
- Ron Waksman
- From the Section of Interventional Cardiology, MedStar Washington Hospital Center, DC (R.W., M.J.L., J.G., R.T., D.M.H., P.C.W.); CVPath Institute, Inc, Gaithersburg, MD (E.A., Q.C., L.A., S.T., M.J., F.D.K., R.V.); and Biotronik AG, Bülach, Switzerland (P.Z.).
| | - Michael J Lipinski
- From the Section of Interventional Cardiology, MedStar Washington Hospital Center, DC (R.W., M.J.L., J.G., R.T., D.M.H., P.C.W.); CVPath Institute, Inc, Gaithersburg, MD (E.A., Q.C., L.A., S.T., M.J., F.D.K., R.V.); and Biotronik AG, Bülach, Switzerland (P.Z.)
| | - Eduardo Acampado
- From the Section of Interventional Cardiology, MedStar Washington Hospital Center, DC (R.W., M.J.L., J.G., R.T., D.M.H., P.C.W.); CVPath Institute, Inc, Gaithersburg, MD (E.A., Q.C., L.A., S.T., M.J., F.D.K., R.V.); and Biotronik AG, Bülach, Switzerland (P.Z.)
| | - Qi Cheng
- From the Section of Interventional Cardiology, MedStar Washington Hospital Center, DC (R.W., M.J.L., J.G., R.T., D.M.H., P.C.W.); CVPath Institute, Inc, Gaithersburg, MD (E.A., Q.C., L.A., S.T., M.J., F.D.K., R.V.); and Biotronik AG, Bülach, Switzerland (P.Z.)
| | - Lila Adams
- From the Section of Interventional Cardiology, MedStar Washington Hospital Center, DC (R.W., M.J.L., J.G., R.T., D.M.H., P.C.W.); CVPath Institute, Inc, Gaithersburg, MD (E.A., Q.C., L.A., S.T., M.J., F.D.K., R.V.); and Biotronik AG, Bülach, Switzerland (P.Z.)
| | - Sho Torii
- From the Section of Interventional Cardiology, MedStar Washington Hospital Center, DC (R.W., M.J.L., J.G., R.T., D.M.H., P.C.W.); CVPath Institute, Inc, Gaithersburg, MD (E.A., Q.C., L.A., S.T., M.J., F.D.K., R.V.); and Biotronik AG, Bülach, Switzerland (P.Z.)
| | - Jiaxiang Gai
- From the Section of Interventional Cardiology, MedStar Washington Hospital Center, DC (R.W., M.J.L., J.G., R.T., D.M.H., P.C.W.); CVPath Institute, Inc, Gaithersburg, MD (E.A., Q.C., L.A., S.T., M.J., F.D.K., R.V.); and Biotronik AG, Bülach, Switzerland (P.Z.)
| | - Rebecca Torguson
- From the Section of Interventional Cardiology, MedStar Washington Hospital Center, DC (R.W., M.J.L., J.G., R.T., D.M.H., P.C.W.); CVPath Institute, Inc, Gaithersburg, MD (E.A., Q.C., L.A., S.T., M.J., F.D.K., R.V.); and Biotronik AG, Bülach, Switzerland (P.Z.)
| | - David M Hellinga
- From the Section of Interventional Cardiology, MedStar Washington Hospital Center, DC (R.W., M.J.L., J.G., R.T., D.M.H., P.C.W.); CVPath Institute, Inc, Gaithersburg, MD (E.A., Q.C., L.A., S.T., M.J., F.D.K., R.V.); and Biotronik AG, Bülach, Switzerland (P.Z.)
| | - Peter C Westman
- From the Section of Interventional Cardiology, MedStar Washington Hospital Center, DC (R.W., M.J.L., J.G., R.T., D.M.H., P.C.W.); CVPath Institute, Inc, Gaithersburg, MD (E.A., Q.C., L.A., S.T., M.J., F.D.K., R.V.); and Biotronik AG, Bülach, Switzerland (P.Z.)
| | - Michael Joner
- From the Section of Interventional Cardiology, MedStar Washington Hospital Center, DC (R.W., M.J.L., J.G., R.T., D.M.H., P.C.W.); CVPath Institute, Inc, Gaithersburg, MD (E.A., Q.C., L.A., S.T., M.J., F.D.K., R.V.); and Biotronik AG, Bülach, Switzerland (P.Z.)
| | - Philine Zumstein
- From the Section of Interventional Cardiology, MedStar Washington Hospital Center, DC (R.W., M.J.L., J.G., R.T., D.M.H., P.C.W.); CVPath Institute, Inc, Gaithersburg, MD (E.A., Q.C., L.A., S.T., M.J., F.D.K., R.V.); and Biotronik AG, Bülach, Switzerland (P.Z.)
| | - Frank D Kolodgie
- From the Section of Interventional Cardiology, MedStar Washington Hospital Center, DC (R.W., M.J.L., J.G., R.T., D.M.H., P.C.W.); CVPath Institute, Inc, Gaithersburg, MD (E.A., Q.C., L.A., S.T., M.J., F.D.K., R.V.); and Biotronik AG, Bülach, Switzerland (P.Z.)
| | - Renu Virmani
- From the Section of Interventional Cardiology, MedStar Washington Hospital Center, DC (R.W., M.J.L., J.G., R.T., D.M.H., P.C.W.); CVPath Institute, Inc, Gaithersburg, MD (E.A., Q.C., L.A., S.T., M.J., F.D.K., R.V.); and Biotronik AG, Bülach, Switzerland (P.Z.)
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Rokaya D, Srimaneepong V, Sapkota J, Qin J, Siraleartmukul K, Siriwongrungson V. Polymeric materials and films in dentistry: An overview. J Adv Res 2018; 14:25-34. [PMID: 30364755 PMCID: PMC6198729 DOI: 10.1016/j.jare.2018.05.001] [Citation(s) in RCA: 81] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Revised: 05/01/2018] [Accepted: 05/01/2018] [Indexed: 11/13/2022] Open
Abstract
The use of polymeric materials (PMs) and polymeric films (PMFs) has increased in medicine and dentistry. This increasing interest is attributed to not only the excellent surfaces of PMs and PMFs but also their desired mechanical and biological properties, low production cost, and ease in processing, allowing them to be tailored for a wide range of applications. Specifically, PMs and PMFs are used in dentistry for their antimicrobial, drug delivery properties; in preventive, restorative and regenerative therapies; and for corrosion and friction reduction. PMFs such as acrylic acid copolymers are used as a dental adhesive; polylactic acids are used for dental pulp and dentin regeneration, and bioactive polymers are used as advanced drug delivery systems. The objective of this article was to review the literatures on the latest advancements in the use of PMs and PMFs in medicine and dentistry. Published literature (1990–2017) on PMs and PMFs for use in medicine and dentistry was reviewed using MEDLINE/PubMed and ScienceDirect resources. Furthermore, this review also explores the diversity of latest PMs and PMFs that have been utilized in dental applications, and analyzes the benefits and limitations of PMs and PMFs. Most of the PMs and PMFs have shown to improve the biomechanical properties of dental materials, but in future, more clinical studies are needed to create better treatment guidelines for patients.
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Affiliation(s)
- Dinesh Rokaya
- Biomaterial and Material for Dental Treatment, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand
| | - Viritpon Srimaneepong
- Biomaterial and Material for Dental Treatment, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand.,Department of Prosthodontics, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand
| | - Janak Sapkota
- Institute of Polymer Processing, Department of Polymer Engineering and Science, Montanuniversitaet Leoben, Otto-Glockel Strasse 2, 800 Leoben, Austria
| | - Jiaqian Qin
- Metallurgy and Materials Science Research Institute (MMRI), Chulalongkorn University, Bangkok, Thailand
| | - Krisana Siraleartmukul
- Metallurgy and Materials Science Research Institute (MMRI), Chulalongkorn University, Bangkok, Thailand
| | - Vilailuck Siriwongrungson
- College of Advanced Manufacturing Innovations, King Mongkut's Institute of Technology, Ladkrabang, Thailand
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23
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Bioinspired surface functionalization of metallic biomaterials. J Mech Behav Biomed Mater 2018; 77:90-105. [DOI: 10.1016/j.jmbbm.2017.08.035] [Citation(s) in RCA: 111] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Revised: 08/23/2017] [Accepted: 08/29/2017] [Indexed: 12/31/2022]
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24
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Braune S, Sperling C, Maitz MF, Steinseifer U, Clauser J, Hiebl B, Krajewski S, Wendel HP, Jung F. Evaluation of platelet adhesion and activation on polymers: Round-robin study to assess inter-center variability. Colloids Surf B Biointerfaces 2017; 158:416-422. [PMID: 28719863 DOI: 10.1016/j.colsurfb.2017.06.053] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Revised: 06/28/2017] [Accepted: 06/30/2017] [Indexed: 11/19/2022]
Abstract
The regulatory agencies provide recommendations rather than protocols or standard operation procedures for the hemocompatibility evaluation of novel materials e.g. for cardiovascular applications. Thus, there is a lack of specifications with regard to test setups and procedures. As a consequence, laboratories worldwide perform in vitro assays under substantially different test conditions, so that inter-laboratory and inter-study comparisons are impossible. Here, we report about a prospective, randomized and double-blind multicenter trial which demonstrates that standardization of in vitro test protocols allows a reproducible assessment of platelet adhesion and activation from fresh human platelet rich plasma as possible indicators of the thrombogenicity of cardiovascular implants. Standardization of the reported static in vitro setup resulted in a laboratory independent scoring of the following materials: poly(dimethyl siloxane) (PDMS), poly(ethylene terephthalate) (PET) and poly(tetrafluoro ethylene) (PTFE). The results of this in vitro study provide evidence that inter-laboratory and inter-study comparisons can be achieved for the evaluation of the adhesion and activation of platelets on blood-contacting biomaterials by stringent standardization of test protocols.
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Affiliation(s)
- S Braune
- Institute of Biomaterial Science and Berlin-Brandenburg Centre for Regenerative Therapies (BCRT), Helmholtz-Zentrum Geesthacht, Teltow, Germany
| | - C Sperling
- Max Bergmann Center of Biomaterials Dresden, Leibniz Institute of Polymer Research Dresden, Dresden, Germany
| | - M F Maitz
- Max Bergmann Center of Biomaterials Dresden, Leibniz Institute of Polymer Research Dresden, Dresden, Germany
| | - U Steinseifer
- Department of Cardiovascular Engineering, Institute of Applied Medical Engineering Helmholtz-Institute, RWTH Aachen University, Aachen, Germany
| | - J Clauser
- Department of Cardiovascular Engineering, Institute of Applied Medical Engineering Helmholtz-Institute, RWTH Aachen University, Aachen, Germany
| | - B Hiebl
- Institute for Animal Hygiene, Animal Welfare and Farm Animal Behaviour, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
| | - S Krajewski
- Department of Thoracic and Cardiovascular Surgery, University Medical Center Tübingen, Tübingen, Germany
| | - H P Wendel
- Department of Thoracic and Cardiovascular Surgery, University Medical Center Tübingen, Tübingen, Germany
| | - F Jung
- Institute of Biomaterial Science and Berlin-Brandenburg Centre for Regenerative Therapies (BCRT), Helmholtz-Zentrum Geesthacht, Teltow, Germany.
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25
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Qiao WH, Liu P, Hu D, Al Shirbini M, Zhou XM, Dong NG. Sequential hydrophile and lipophile solubilization as an efficient method for decellularization of porcine aortic valve leaflets: Structure, mechanical property and biocompatibility study. J Tissue Eng Regen Med 2017; 12:e828-e840. [PMID: 27957807 DOI: 10.1002/term.2388] [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: 10/14/2015] [Revised: 10/03/2016] [Accepted: 12/06/2016] [Indexed: 01/25/2023]
Abstract
Antigenicity of xenogeneic tissues is the major obstacle to increased use of these materials in clinical medicine. Residual xenoantigens in decellularized tissue elicit the immune response after implantation, causing graft failure. With this in mind, the potential use is proposed of three protein solubilization-based protocols for porcine aortic valve leaflets decellularization. It was demonstrated that hydrophile solubilization alone achieved incomplete decellularization; lipophile solubilization alone (LSA) completely removed all cells and two most critical xenoantigens - galactose-α(1,3)-galactose (α-Gal) and major histocompatibility complex I (MHC I) - but caused severe alterations of the structure and mechanical properties; sequential hydrophile and lipophile solubilization (SHLS) resulted in a complete removal of cells, α-Gal and MHC I, and good preservation of the structure and mechanical properties. In contrast, a previously reported method using Triton X-100, sodium deoxycholate and IGEPAL CA-630 resulted in a complete removal of all cells and MHC I, but with remaining α-Gal epitope. LSA- and SHLS-treated leaflets showed significantly reduced leucocyte activation (polymorphonuclear elastase) upon interaction with human blood in vitro. When implanted subdermally in rats for 6 weeks, LSA- or SHLS-treated leaflets were presented with more biocompatible implants and all four decellularized leaflets were highly resistant to calcification. These findings illustrate that the SHLS protocol could be considered as a promising decellularization method for the decellularization of xenogeneic tissues in tissue engineering and regenerative medicine. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Wei-Hua Qiao
- Department of Cardiovascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Peng Liu
- Department of Cardiovascular Surgery, Henan Provincial People's Hospital, Henan Cardiovascular Disease Institute, Zhengzhou, China
| | - Dan Hu
- Department of Cardiovascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Mahmoud Al Shirbini
- Department of Cardiovascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xian-Ming Zhou
- Department of Cardiovascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Nian-Guo Dong
- Department of Cardiovascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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26
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Chun Y, Kealey CP, Levi DS, Rigberg DA, Chen Y, Tillman BW, Mohanchandra KP, Shayan M, Carman GP. An in vivo pilot study of a microporous thin film nitinol-covered stent to assess the effect of porosity and pore geometry on device interaction with the vessel wall. J Biomater Appl 2016; 31:1196-1202. [DOI: 10.1177/0885328216682691] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Sputter-deposited thin film nitinol constructs with various micropatterns were fabricated to evaluate their effect on the vessel wall in vivo when used as a covering for commercially available stents. Thin film nitinol constructs were used to cover stents and deployed in non-diseased swine arteries. Swine were sacrificed after approximately four weeks and the thin film nitinol-covered stents were removed for histopathologic evaluation. Histopathology revealed differences in neointimal thickness that correlated with the thin film nitinol micropattern. Devices covered with thin film nitinol with a lateral × vertical length = 20 × 40 µm diamond pattern had minimal neointimal growth with well-organized cell architecture and little evidence of ongoing inflammation. Devices covered with thin film nitinol with smaller fenestrations exhibited a relatively thick neointimal layer with inflammation and larger fenestrations showed migration of inflammatory and smooth muscle cells through the micro fenestrations. This “proof-of-concept” study suggests that there may be an ideal thin film nitinol porosity and pore geometry to encourage endothelialization and incorporation of the device into the vessel wall. Future work will be needed to determine the optimal pore size and geometry to minimize neointimal proliferation and in-stent stenosis.
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Affiliation(s)
- Youngjae Chun
- Department of Industrial Engineering, University of Pittsburgh, Pittsburgh, PA, USA
- Department of Bioengineering, McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Colin P Kealey
- Advanced Development & Medical Affairs, NeuroSigma, Inc., Los Angeles, CA, USA
| | - Daniel S Levi
- Pediatric Cardiology, Mattel Children’s Hospital, University of California, Los Angeles, CA, USA
| | - David A Rigberg
- Division of Vascular Surgery, Ronald Reagan UCLA Medical Center, UCLA Surg-Vascular, Los Angeles, CA, USA
| | - Yanfei Chen
- Department of Industrial Engineering, University of Pittsburgh, Pittsburgh, PA, USA
| | - Bryan W Tillman
- Division of Vascular Surgery, Ronald Reagan UCLA Medical Center, UCLA Surg-Vascular, Los Angeles, CA, USA
| | - KP Mohanchandra
- Department of Mechanical and Aerospace Engineering, University of California, Los Angeles, CA, USA
| | - Mahdis Shayan
- Department of Industrial Engineering, University of Pittsburgh, Pittsburgh, PA, USA
| | - Gregory P Carman
- Department of Mechanical and Aerospace Engineering, University of California, Los Angeles, CA, USA
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27
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Liang C, Hu Y, Wang H, Xia D, Li Q, Zhang J, Yang J, Li B, Li H, Han D, Dong M. Biomimetic cardiovascular stents for in vivo re-endothelialization. Biomaterials 2016; 103:170-182. [DOI: 10.1016/j.biomaterials.2016.06.042] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Revised: 06/04/2016] [Accepted: 06/19/2016] [Indexed: 12/27/2022]
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28
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Waasdorp E, van't Hullenaar C, van Herwaarden J, Kelder H, van de Pavoordt E, Overtoom T, Moll F, de Vries JP. Renal Function after Endovascular Aortic Aneurysm Repair: A Single-Center Experience with Transrenal versus Infrarenal Fixation. J Endovasc Ther 2016; 14:130-7. [PMID: 17484527 DOI: 10.1177/152660280701400203] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Purpose: To describe the short-term consequences of endovascular aortic aneurysm repair (EVAR) on renal function after infrarenal (IR) versus transrenal (TR) stent-graft fixation. Methods: Between December 1996 and January 2006, 369 consecutive patients were treated with EVAR. All patients had an AneuRx or a Talent stent-graft implanted using IR (AneuRx) or transrenal (Talent) fixation. Post-EVAR, a standardized follow-up scheme included computed tomography (CT) scanning and serum creatinine measurements at 2 days, 3 months, and 12 months. Postoperative renal dysfunction was defined as a >20% decrease in serum creatinine clearance compared to baseline, the presence of new-onset dialysis, or both. Of the 369 patients, 309 (291 men; mean age 71±7 years, range 63–82) had complete 1-year follow-up and were included in this study. An IR stent-graft was placed in 190 patients, and a TR stent-graft was placed in the remaining 119 patients. Results: At discharge, renal dysfunction occurred in 3.7% of the patients in the IR group versus 5.9% in the TR group (p=NS) and rose significantly to 13.7% in the IR group (p=0.001) and 15.1% in the TR group (p=0.02) at the 1-year follow-up. However, no significant difference was noted between the IR and TR groups at either time point. At the 1-year follow-up, at least 50% of renal dysfunction was caused by obstructions of (accessory) renal arteries and renal infarctions. During the follow-up interval, 3 (0.97%) of 309 patients underwent new-onset dialysis. Conclusion: Both infrarenal and transrenal fixation techniques in EVAR will lead to a significant rise in renal dysfunction during the first year. A few patients with dysfunction will require dialysis.
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Affiliation(s)
- Evert Waasdorp
- Department of Vascular Surgery, St. Antonius Hospital, Nieuwegein, The Netherlands
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29
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Shayan M, Chun Y. An overview of thin film nitinol endovascular devices. Acta Biomater 2015; 21:20-34. [PMID: 25839120 DOI: 10.1016/j.actbio.2015.03.025] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2014] [Revised: 02/03/2015] [Accepted: 03/19/2015] [Indexed: 10/23/2022]
Abstract
Thin film nitinol has unique mechanical properties (e.g., superelasticity), excellent biocompatibility, and ultra-smooth surface, as well as shape memory behavior. All these features along with its low-profile physical dimension (i.e., a few micrometers thick) make this material an ideal candidate in developing low-profile medical devices (e.g., endovascular devices). Thin film nitinol-based devices can be collapsed and inserted in remarkably smaller diameter catheters for a wide range of catheter-based procedures; therefore, it can be easily delivered through highly tortuous or narrow vascular system. A high-quality thin film nitinol can be fabricated by vacuum sputter deposition technique. Micromachining techniques were used to create micro patterns on the thin film nitinol to provide fenestrations for nutrition and oxygen transport and to increase the device's flexibility for the devices used as thin film nitinol covered stent. In addition, a new surface treatment method has been developed for improving the hemocompatibility of thin film nitinol when it is used as a graft material in endovascular devices. Both in vitro and in vivo test data demonstrated a superior hemocompatibility of the thin film nitinol when compared with commercially available endovascular graft materials such as ePTFE or Dacron polyester. Promising features like these have motivated the development of thin film nitinol as a novel biomaterial for creating endovascular devices such as stent grafts, neurovascular flow diverters, and heart valves. This review focuses on thin film nitinol fabrication processes, mechanical and biological properties of the material, as well as current and potential thin film nitinol medical applications.
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30
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Walker EK, Nauman EA, Allain JP, Stanciu LA. An in vitro model for preclinical testing of thrombogenicity of resorbable metallic stents. J Biomed Mater Res A 2014; 103:2118-25. [PMID: 25294677 DOI: 10.1002/jbm.a.35348] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2014] [Revised: 09/11/2014] [Accepted: 09/30/2014] [Indexed: 11/10/2022]
Abstract
Vascular stents that can biodegrade and disappear in time have been reported as a promising solution to the problems of late-stent thrombosis and in-stent restenosis. Iron alloys in particular have many advantages in terms of cytocompatibility and mechanical properties. Despite mechanical behavior and biocompatibility studies, little attention has been given to the thrombogenic potential of these stents. This article presents the first study that aims to close this gap by addressing the hemocompatibility of resorbable iron-based alloys and composites in an in vitro porcine blood model. The investigated braided biodegradable stents included 99.95% pure Fe (50% cold worked), Fe35Mn alloy, Fe35Mn-25% ZM21 (ZM21 is 2% Zn, 0.5% Mn, balance Mg), Fe-25% Mg, and Fe-57% Mg. All stents were formed by braiding 127 µm diameter wires into stents with an outer diameter of 6.35 mm. Inflammatory reaction and thrombocyte activation were examined by assessment of β-thromboglobulin, thrombin-antithrombin complex, and polymorphonuclear elastase levels. The potential of Fe35Mn for use in vascular stenting is demonstrated by its exhibition of the least thrombogenic potential among tested materials. All bioresorbable Fe-Mn alloy compositions showed a reduced propensity towards platelet adhesion compared to 316L stainless steel, further indicating a general positive shift towards reduced thrombogenicity compared to traditional stents.
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Affiliation(s)
- Emily K Walker
- School of Materials Engineering, Purdue University, West Lafayette, Indiana, 47907
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31
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Surface plasma modification and tropoelastin coating of a polyurethane co-polymer for enhanced cell attachment and reduced thrombogenicity. Biomaterials 2014; 35:6797-809. [DOI: 10.1016/j.biomaterials.2014.04.082] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2014] [Accepted: 04/22/2014] [Indexed: 01/12/2023]
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32
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Liu X, Yuan L, Li D, Tang Z, Wang Y, Chen G, Chen H, Brash JL. Blood compatible materials: state of the art. J Mater Chem B 2014; 2:5718-5738. [PMID: 32262016 DOI: 10.1039/c4tb00881b] [Citation(s) in RCA: 204] [Impact Index Per Article: 20.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Devices that function in contact with blood are ubiquitous in clinical medicine and biotechnology. These devices include vascular grafts, coronary stents, heart valves, catheters, hemodialysers, heart-lung bypass systems and many others. Blood contact generally leads to thrombosis (among other adverse outcomes), and no material has yet been developed which remains thrombus-free indefinitely and in all situations: extracorporeally, in the venous circulation and in the arterial circulation. In this article knowledge on blood-material interactions and "thromboresistant" materials is reviewed. Current approaches to the development of thromboresistant materials are discussed including surface passivation; incorporation and/or release of anticoagulants, antiplatelet agents and thrombolytic agents; and mimicry of the vascular endothelium.
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Affiliation(s)
- Xiaoli Liu
- The Key Lab of Health Chemistry and Molecular Diagnosis of Suzhou, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China.
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33
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Major TC, Handa H, Annich GM, Bartlett RH. Development and hemocompatibility testing of nitric oxide releasing polymers using a rabbit model of thrombogenicity. J Biomater Appl 2014; 29:479-501. [PMID: 24934500 DOI: 10.1177/0885328214538866] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Hemocompatibility is the goal for any biomaterial contained in extracorporeal life supporting medical devices. The hallmarks for hemocompatibility include nonthrombogenicity, platelet preservation, and maintained platelet function. Both in vitro and in vivo assays testing for compatibility of the blood/biomaterial interface have been used over the last several decades to ascertain if the biomaterial used in medical tubing and devices will require systemic anticoagulation for viability. Over the last 50 years systemic anticoagulation with heparin has been the gold standard in maintaining effective extracorporeal life supporting. However, the biomaterial that maintains effective ECLS without the use of any systemic anticoagulant has remained elusive. In this review, the in vivo 4-h rabbit thrombogenicity model genesis will be described with emphasis on biomaterials that may require no systemic anticoagulation for extracorporeal life supporting longevity. These novel biomaterials may improve extracorporeal circulation hemocompatibility by preserving near resting physiology of the major blood components, the platelets and monocytes. The rabbit extracorporeal circulation model provides a complete assessment of biomaterial interactions with the intrinsic coagulation players, the circulating platelet and monocytes. This total picture of blood/biomaterial interaction suggests that this rabbit thrombogenicity model could provide a standardization for biomaterial hemocompatibility testing.
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Affiliation(s)
- Terry C Major
- Department of Surgery, University of Michigan Health System, Ann Arbor, USA
| | - Hitesh Handa
- Department of Surgery, University of Michigan Health System, Ann Arbor, USA
| | - Gail M Annich
- Department of Pediatrics, University of Michigan Health System, Ann Arbor, USA
| | - Robert H Bartlett
- Department of Surgery, University of Michigan Health System, Ann Arbor, USA
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34
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Perkins J, Hong Y, Ye SH, Wagner WR, Desai S. Direct writing of bio-functional coatings for cardiovascular applications. J Biomed Mater Res A 2014; 102:4290-300. [PMID: 24497436 DOI: 10.1002/jbm.a.35105] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2013] [Revised: 01/23/2014] [Accepted: 01/30/2014] [Indexed: 11/10/2022]
Abstract
The surface modification of metallic biomaterials is of critical importance to enhance the biocompatibility of surgical implant materials and devices. This article investigates the use of a direct-write inkjet technique for multilayer coatings of a biodegradable polymer (polyester urethane urea (PEUU)) embedded with an anti-proliferation drug paclitaxel (Taxol). The direct-write inkjet technique provides selective patterning capability for depositing multimaterial coatings on three-dimensional implant devices such as pins, screws, and stents for orthopedic and vascular applications. Drug release profiles were studied to observe the influence of drug loading and coating thickness for obtaining tunable release kinetics. Platelet deposition studies were conducted following ovine blood contact and significant reduction in platelet deposition was observed on the Taxol loaded PEUU substrate compared with the unloaded control. Rat smooth muscle cells were used for cell proliferation studies. Significant reduction in cell growth was observed following the release of anti-proliferative drug from the biopolymer thin film. This research provides a basis for developing anti-proliferative biocompatible coatings for different biomedical device applications.
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Affiliation(s)
- Jessica Perkins
- Department of Industrial and Systems Engineering, North Carolina A&T State University, 1601 E. Market St, Greensboro, North Carolina, 27411; Engineering Research Center for Revolutionizing Metallic Biomaterials, North Carolina A&T State University, 1601 E. Market St., Greensboro, North Carolina, 27411
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35
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Bravo LA, de Cabañes AG, Manero JM, Rúperez E, Gil FJ. NiTi superelastic orthodontic archwires with polyamide coating. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2014; 25:555-560. [PMID: 24154920 DOI: 10.1007/s10856-013-5070-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2013] [Accepted: 10/09/2013] [Indexed: 06/02/2023]
Abstract
Twenty orthodontic archwires with 55.2% Ni and 44.8% Ti (% weight) were subjected to a dipping treatment to coat the NiTi surface by a polyamide polymer. It has been selected a Polyamide 11 due to its remarkable long lasting performance. The transformation temperatures as well as the transformation stresses of the NiTi alloy were determined in order to know whether the coating process can alter its properties. The adhesive wear tests have been demonstrated that the wear rates as well as the dynamic friction coefficients μ of polymer coated wires are much lower than metallic wires. The corrosion studies have shown that the use of this polymer, as coating, seals the NiTi surface to prevent corrosion and the release of nickel ions. The average decrease of Ni ions release due to this coating is around 85%.
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Affiliation(s)
- L A Bravo
- Unidad Docente de Ortodoncia, Facultad de Odontología, Universidad de Murcia, Murcia, Spain
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36
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Muhammad R, Lim SH, Goh SH, Law JBK, Saifullah MSM, Ho GW, Yim EKF. Sub-100 nm patterning of TiO2 film for the regulation of endothelial and smooth muscle cell functions. Biomater Sci 2014; 2:1740-1749. [DOI: 10.1039/c4bm00212a] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A sub-100 nm nano-imprinted TiO2 layer significantly inhibited the proliferation of SMCs and increased the proliferation of HUVECs. Focal adhesions size, density and distribution were significantly modulated by nano-imprinted TiO2.
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Affiliation(s)
- R. Muhammad
- Department of Biomedical Engineering
- National University of Singapore
- Singapore 117576, Republic of Singapore
- Institute of Materials Research and Engineering
- A*STAR (Agency for Science
| | - S. H. Lim
- Institute of Materials Research and Engineering
- A*STAR (Agency for Science
- Technology and Research)
- Singapore 117602, Republic of Singapore
- Department of Electrical and Computer Engineering
| | - S. H. Goh
- Department of Biomedical Engineering
- National University of Singapore
- Singapore 117576, Republic of Singapore
- Institute of Materials Research and Engineering
- A*STAR (Agency for Science
| | - J. B. K. Law
- Institute of Materials Research and Engineering
- A*STAR (Agency for Science
- Technology and Research)
- Singapore 117602, Republic of Singapore
| | - M. S. M. Saifullah
- Institute of Materials Research and Engineering
- A*STAR (Agency for Science
- Technology and Research)
- Singapore 117602, Republic of Singapore
| | - G. W. Ho
- Department of Electrical and Computer Engineering
- National University of Singapore
- Singapore 117576, Republic of Singapore
| | - E. K. F. Yim
- Department of Biomedical Engineering
- National University of Singapore
- Singapore 117576, Republic of Singapore
- Mechanobiology Institute
- National University of Singapore
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37
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Qiu H, He C, Zhou L, Shao H, Fan H, Mo H, Zhang J, Zhou N, Shen J. Thermal stability and kinetics of thermal degradation of PMVS/SiO 2/GO-C 12-hep composites. J Appl Polym Sci 2013. [DOI: 10.1002/app.39165] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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38
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van Oeveren W. Obstacles in haemocompatibility testing. SCIENTIFICA 2013; 2013:392584. [PMID: 24278774 PMCID: PMC3820147 DOI: 10.1155/2013/392584] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/13/2013] [Accepted: 04/03/2013] [Indexed: 06/02/2023]
Abstract
ISO 10993-4 is an international standard describing the methods of testing of medical devices for interactions with blood for regulatory purpose. The complexity of blood responses to biomaterial surfaces and the variability of blood functions in different individuals and species pose difficulties in standardisation. Moreover, in vivo or in vitro testing, as well as the clinical relevance of certain findings, is still matter of debate. This review deals with the major remaining problems, including a brief explanation of surface interactions with blood, the current ISO 10993 requirements for testing, and the role of in vitro test models. The literature is reviewed on anticoagulation, shear rate, blood-air interfaces, incubation time, and the importance of evaluation of the surface area after blood contact. Two test categories deserve further attention: complement and platelet function, including the effects on platelets from adhesion proteins, venipuncture, and animal derived- blood. The material properties, hydrophilicity, and roughness, as well as reference materials, are discussed. Finally this review calls for completing the acceptance criteria in the ISO standard based on a panel of test results.
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Affiliation(s)
- W. van Oeveren
- HaemoScan and Department of Cardiothoracic Surgery, UMCG Groningen, The Netherlands
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Milleret V, Hefti T, Hall H, Vogel V, Eberli D. Influence of the fiber diameter and surface roughness of electrospun vascular grafts on blood activation. Acta Biomater 2012; 8:4349-56. [PMID: 22842036 DOI: 10.1016/j.actbio.2012.07.032] [Citation(s) in RCA: 129] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2012] [Revised: 07/18/2012] [Accepted: 07/20/2012] [Indexed: 01/09/2023]
Abstract
Electrospun grafts have been widely investigated for vascular graft replacement due to their ease and compatibility with many natural and synthetic polymers. Here, the effect of the processing parameters on the scaffold's architecture and subsequent reactions of partially heparinized blood triggered by contacting these topographies were studied. Degrapol® (DP) and poly(lactic-co-glycolic acid) (PLGA) electrospun fibrous scaffolds were characterized with regard to fiber diameter, pore area and scaffold roughness. The study showed that electrospinning parameters greatly affect fiber diameter together with pore dimension and overall scaffold roughness. Coagulation cascade activation, early platelet adhesion and activation were analyzed after 2h of exposure of blood to the biomaterials. While no differences were found between DP and PLGA with similar topographies, the blood reactions were observed to be dependent on the fiber diameter and scaffold roughness. Scaffolds composed of thin fibers (diameter <1μm) triggered very low coagulation and almost no platelets adhered. On the other hand, scaffolds with a bigger fiber diameter (2-3μm) triggered higher thrombin formation and more platelets adhered. The highest platelet adhesion and activations rates as well as coagulation cascade activation were found in blood incubated in contact with the scaffolds produced with the biggest fiber diameter (5μm). These findings indicate that electrospun grafts with small fiber diameter (<1μm) could perform better with reduced early thrombogenicity due to lower platelet adhesion and lower activation of platelets and coagulation cascade.
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Affiliation(s)
- Vincent Milleret
- Cells and Biomaterials, Department of Materials, ETH Zurich, Switzerland.
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Management of peripheral arterial interventions with mono or dual antiplatelet therapy--the MIRROR study: a randomised and double-blinded clinical trial. Eur Radiol 2012; 22:1998-2006. [PMID: 22569995 DOI: 10.1007/s00330-012-2441-2] [Citation(s) in RCA: 124] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2011] [Revised: 02/01/2012] [Accepted: 02/21/2012] [Indexed: 12/28/2022]
Abstract
OBJECTIVES To investigate the influence of dual antiplatelet therapy vs. aspirin alone on local platelet activation and clinical endpoints in patients with PAD treated with endovascular therapy. METHODS Patients received either 500 mg aspirin and 300 mg clopidogrel before intervention followed by a daily dose of 100 mg aspirin and 75 mg clopidogrel for 6 months, or the same doses of aspirin plus placebo instead of clopidogrel. Primary endpoints were local concentrations of platelet activation markers β-thromboglobulin and CD40L, and the rate of patient's resistant to clopidogrel. Secondary endpoints included the clinical development 6 months after the intervention. RESULTS Eighty patients, 40 in each group, were enrolled. The median peri-interventional concentration of β-TG was 224.5 vs. 365.5 (P = 0.03) in the clopidogrel and placebo group. The concentration of CD40L was 127 and 206.5 (P = 0.05). Thirty per cent of patients who had received clopidogrel were resistant. Two clopidogrel and eight placebo patients required TLR (P = 0.04). The clopidogrel patients who needed revascularisation were both resistant to clopidogrel. Minor bleeding complications occurred in one clopidogrel and two placebo patients. CONCLUSION Dual antiplatetet therapy reduces peri-interventional platelet activation and improves functional outcome without higher bleeding complications. An individual tailored dual antiplatelet therapy seems desirable for endovascularly treated patients with PAD.
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Yeh HY, Lin JC. Bioactivity and Platelet Adhesion Study of a Human Thrombomodulin-Immobilized Nitinol Surface. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 20:807-19. [DOI: 10.1163/156856209x426952] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Hsi-Yi Yeh
- a Department of Chemical Engineering, National Cheng Kung University, Tainan, Taiwan, R.O.C
| | - Jui-Che Lin
- b Department of Chemical Engineering, National Cheng Kung University, Tainan, Taiwan, R.O.C
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NCO-sP(EO-stat-PO) coatings on gold sensors--a QCM study of hemocompatibility. SENSORS 2011; 11:5253-69. [PMID: 22163899 PMCID: PMC3231391 DOI: 10.3390/s110505253] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/25/2011] [Revised: 04/19/2011] [Accepted: 05/09/2011] [Indexed: 11/17/2022]
Abstract
The reliability of implantable blood sensors is often hampered by unspecific adsorption of plasma proteins and blood cells. This not only leads to a loss of sensor signal over time, but can also result in undesired host vs. graft reactions. Within this study we evaluated the hemocompatibility of isocyanate conjugated star shaped polytheylene oxide-polypropylene oxide co-polymers NCO-sP(EO-stat-PO) when applied to gold surfaces as an auspicious coating material for gold sputtered blood contacting sensors. Quartz crystal microbalance (QCM) sensors were coated with ultrathin NCO-sP(EO-stat-PO) films and compared with uncoated gold sensors. Protein resistance was assessed by QCM measurements with fibrinogen solution and platelet poor plasma (PPP), followed by quantification of fibrinogen adsorption. Hemocompatibility was tested by incubation with human platelet rich plasma (PRP). Thrombin antithrombin-III complex (TAT), β-thromboglobulin (β-TG) and platelet factor 4 (PF4) were used as coagulation activation markers. Furthermore, scanning electron microscopy (SEM) was used to visualize platelet adhesion to the sensor surfaces. Compared to uncoated gold sensors, NCO-sP(EO-stat-PO) coated sensors revealed significant better resistance against protein adsorption, lower TAT generation and a lower amount of adherent platelets. Moreover, coating with ultrathin NCO-sP(EO-stat-PO) films creates a cell resistant hemocompatible surface on gold that increases the chance of prolonged sensor functionality and can easily be modified with specific receptor molecules.
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Peng H, Schlaich EM, Row S, Andreadis ST, Swartz DD. A novel ovine ex vivo arteriovenous shunt model to test vascular implantability. Cells Tissues Organs 2011; 195:108-21. [PMID: 22005667 DOI: 10.1159/000331415] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
The major objective of successful development of tissue-engineered vascular grafts is long-term in vivo patency. Optimization of matrix, cell source, surface modifications, and physical preconditioning are all elements of attaining a compatible, durable, and functional vascular construct. In vitro model systems are inadequate to test elements of thrombogenicity and vascular dynamic functional properties while in vivo implantation is complicated, labor-intensive, and cost-ineffective. We proposed an ex vivo ovine arteriovenous shunt model in which we can test the patency and physical properties of vascular grafts under physiologic conditions. The pressure, flow rate, and vascular diameter were monitored in real-time in order to evaluate the pulse wave velocity, augmentation index, and dynamic elastic modulus, all indicators of graft stiffness. Carotid arteries, jugular veins, and small intestinal submucosa-based grafts were tested. SIS grafts demonstrated physical properties between those of carotid arteries and jugular veins. Anticoagulation properties of grafts were assessed via scanning electron microscopy imaging, en face immunostaining, and histology. Luminal seeding with endothelial cells greatly decreased the attachment of thrombotic components. This model is also suture free, allowing for multiple samples to be stably processed within one animal. This tunable (pressure, flow, shear) ex vivo shunt model can be used to optimize the implantability and long-term patency of tissue-engineered vascular constructs.
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Affiliation(s)
- Haofan Peng
- Department of Chemical and Biological Engineering, Women and Children's Hospital of Buffalo, N.Y., USA
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Devillers S, Barthélémy B, Delhalle J, Mekhalif Z. Induction heating vs conventional heating for the hydrothermal treatment of nitinol and its subsequent 2-(methacryloyloxy)ethyl 2-(trimethylammonio)ethyl phosphate coating by surface-initiated atom transfer radical polymerization. ACS APPLIED MATERIALS & INTERFACES 2011; 3:4059-4066. [PMID: 21910418 DOI: 10.1021/am200912k] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Nitinol is an alloy of great interest in general and especially in the biomedical field where many researches are aimed to improve both its corrosion resistance and its biocompatibility. In this work, we report on the advantage of an induction heating treatment in pure water compared to a conventional hydrothermal procedure. Both treatments lead to a hydroxylation of the surface, a decrease of the nickel amount in the outer part of the oxide layer, and a drastically decreased corrosion current density. However, the amount of surface hydroxyl groups is higher in the case of the induction heating treatment, which in turn leads to a denser grafting of atom transfer radical polymerization initiators and ultimately to a thicker 2-(methacryloyloxy)ethyl 2-(trimethylammonio)ethyl phosphate (MPC) polymer layer than in the case of conventional heating treatments. X-ray photoelectron spectroscopy (XPS), static contact angle, and polarization curves measurements as well as scanning electron microscopy (SEM) have been used to characterize the obtained modified surfaces.
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Affiliation(s)
- S Devillers
- Laboratory of Chemistry and Electrochemistry of Surfaces (CES), University of Namur (FUNDP), rue de Bruxelles, 61, B-5000 Namur, Belgium
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Functionalization of Nitinol surface toward a versatile platform for post-grafting chemical reactions. Electrochim Acta 2011. [DOI: 10.1016/j.electacta.2011.05.136] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Chrzanowski W, Szade J, Hart AD, Knowles JC, Dalby MJ. Biocompatible, smooth, plasma-treated nickel-titanium surface--an adequate platform for cell growth. J Biomater Appl 2011; 26:707-31. [PMID: 21862513 DOI: 10.1177/0885328211416023] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
High nickel content is believed to reduce the number of biomedical applications of nickel-titanium alloy due to the reported toxicity of nickel. The reduction in nickel release and minimized exposure of the cell to nickel can optimize the biocompatibility of the alloy and increase its use in the application where its shape memory effects and pseudoelasticity are particularly useful, e.g., spinal implants. Many treatments have been tried to improve the biocompatibility of Ni-Ti, and results suggest that a native, smooth surface could provide sufficient tolerance, biologically. We hypothesized that the native surface of nickel-titanium supports cell differentiation and insures good biocompatibility. Three types of surface modifications were investigated: thermal oxidation, alkali treatment, and plasma sputtering, and compared with smooth, ground surface. Thermal oxidation caused a drop in surface nickel content, while negligible chemistry changes were observed for plasma-modified samples when compared with control ground samples. In contrast, alkali treatment caused significant increase in surface nickel concentration and accelerated nickel release. Nickel release was also accelerated in thermally oxidized samples at 600 °C, while in other samples it remained at low level. Both thermal oxidation and alkali treatment increased the roughness of the surface, but mean roughness R(a) was significantly greater for the alkali-treated ones. Ground and plasma-modified samples had 'smooth' surfaces with R(a)=4 nm. Deformability tests showed that the adhesion of the surface layers on samples oxidized at 600 °C and alkali treatment samples was not sufficient; the layer delaminated upon deformation. It was observed that the cell cytoskeletons on the samples with a high nickel content or release were less developed, suggesting some negative effects of nickel on cell growth. These effects were observed primarily during initial cell contact with the surface. The most favorable cell responses were observed for ground and plasma-sputtered surfaces. These studies indicated that smooth, plasma-modified surfaces provide sufficient properties for cells to grow.
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Affiliation(s)
- W Chrzanowski
- Faculty of Pharmacy, The University of Sydney, Sydney, NSW 2006, Australia.
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Haddad S, Zanina N, Othmane A, Mora L. Polyurethane films modified by antithrombin–heparin complex to enhance endothelialization: An original impedimetric analysis. Electrochim Acta 2011. [DOI: 10.1016/j.electacta.2011.06.048] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Pulletikurthi C, Munroe N, Gill P, Pandya S, Persaud D, Haider W, Iyer K, McGoron A. Cytotoxicity of Ni from Surface-Treated Porous Nitinol (PNT) on Osteoblast Cells. JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE 2011; 20:824-829. [PMID: 21666866 PMCID: PMC3109905 DOI: 10.1007/s11665-011-9930-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The leaching of nickel from the surface of porous Nitinol (PNT) is mainly dependent on its surface characteristics, which can be controlled by appropriate surface treatments. In this investigation, PNT was subjected to two surface treatments, namely, water-boiling and dry-heating passivations. Phosphate buffer saline (PBS) solutions obtained from cyclic potentiodynamic polarization tests on PNT were employed to assess the cytotoxicity of Ni contained therein on osteoblast cells by Sulforhodamine B (SRB) assay. In addition, similar concentrations of Ni were added exogenously to cell culture media to determine cytotoxic effects on osteoblast cells. The morphologies of the untreated and the surface-treated PNTs were examined using SEM and AFM. Furthermore, growth of human osteoblast cells was observed on the PNT surfaces.
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Effects of micro-magnetic field at the surface of 316L and NiTi alloy on blood compatibility. Med Biol Eng Comput 2010; 49:359-64. [DOI: 10.1007/s11517-010-0685-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2009] [Accepted: 09/17/2010] [Indexed: 10/19/2022]
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50
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Chin-Quee SL, Hsu SH, Nguyen-Ehrenreich KL, Tai JT, Abraham GM, Pacetti SD, Chan YF, Nakazawa G, Kolodgie FD, Virmani R, Ding NN, Coleman LA. Endothelial cell recovery, acute thrombogenicity, and monocyte adhesion and activation on fluorinated copolymer and phosphorylcholine polymer stent coatings. Biomaterials 2010; 31:648-57. [DOI: 10.1016/j.biomaterials.2009.09.079] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2009] [Accepted: 09/21/2009] [Indexed: 11/28/2022]
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