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Zhang X, Chen J, Brott BC, Anderson PG, Hwang P, Sherwood J, Huskin G, Yoon YS, Virmani R, Jun HW. Pro-Healing Nanomatrix-Coated Stent Analysis in an In Vitro Vascular Double-Layer System and in a Rabbit Model. ACS APPLIED MATERIALS & INTERFACES 2022; 14:51728-51743. [PMID: 36346768 PMCID: PMC10860673 DOI: 10.1021/acsami.2c15554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Cardiovascular stent technologies have significantly improved over time. However, their optimal performance remains limited by restenosis, thrombosis, inflammation, and delayed re-endothelialization. Current stent designs primarily target inhibition of neointimal proliferation but do not promote functional arterial healing (pro-healing) in order to restore normal vascular reactivity. The endothelial lining that does develop with current stents appears to have loose intracellular junctions. We have developed a pro-healing nanomatrix coating for stents that enhances healing while limiting neointimal proliferation. This builds on our prior work evaluating the effects of the pro-healing nanomatrix coating on cultures of vascular endothelial cells (ECs), smooth muscle cells (SMCs), monocytes, and platelets. However, when a stent is deployed in an artery, multiple vascular cell types interact, and their interactions affect stent performance. Thus, in our current study, an in vitro vascular double-layer (VDL) system was used to observe stent effects on communication between different vascular cell types. Additionally, we assessed the pro-healing ability and vascular cell interactions after stent deployment in the VDL system and in a rabbit model, evaluating the nanomatrix-coated stent compared to a commercial bare metal stent (BMS) and a drug eluting stent (DES). In vitro results indicated that, in a layered vascular structure, the pro-healing nanomatrix-coated stent could (1) improve endothelialization and endothelial functions, (2) regulate SMC phenotype to reduce SMC proliferation and migration, (3) suppress inflammation through a multifactorial manner, and (4) reduce foam cell formation, extracellular matrix remodeling, and calcification. Consistent with this, in vivo results demonstrated that, compared with commercial BMS and DES, this pro-healing nanomatrix-coated stent enhanced re-endothelialization with negligible restenosis, inflammation, or thrombosis. Thus, these findings indicate the unique pro-healing features of this nanomatrix stent coating with superior efficacy over commercial BMS and DES.
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Affiliation(s)
- Xixi Zhang
- Department of Biomedical Engineering, University of Alabama at Birmingham, Birmingham, AL, 35294, United States
| | - Jun Chen
- Department of Biomedical Engineering, University of Alabama at Birmingham, Birmingham, AL, 35294, United States
| | - Brigitta C. Brott
- Department of Medicine and Division of Cardiovascular Disease, University of Alabama at Birmingham, Birmingham, AL, 35233, United States
- Endomimetics, LLC, Birmingham, AL, 35242, United States
| | - Peter G. Anderson
- Department of Medicine, Department of Pathology, University of Alabama at Birmingham, Birmingham, AL, 35294, United States
| | - Patrick Hwang
- Endomimetics, LLC, Birmingham, AL, 35242, United States
| | | | - Gillian Huskin
- Department of Biomedical Engineering, University of Alabama at Birmingham, Birmingham, AL, 35294, United States
| | - Young-sup Yoon
- School of Medicine, Division of Cardiology, Emory University, Atlanta, GA, 30322, United States
| | - Renu Virmani
- CVPath Institute, Inc., Gaithersburg, MD, 20878, United States
| | - Ho-Wook Jun
- Department of Biomedical Engineering, University of Alabama at Birmingham, Birmingham, AL, 35294, United States
- Endomimetics, LLC, Birmingham, AL, 35242, United States
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2
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Zizhou R, Wang X, Houshyar S. Review of Polymeric Biomimetic Small-Diameter Vascular Grafts to Tackle Intimal Hyperplasia. ACS OMEGA 2022; 7:22125-22148. [PMID: 35811906 PMCID: PMC9260943 DOI: 10.1021/acsomega.2c01740] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Accepted: 06/03/2022] [Indexed: 06/15/2023]
Abstract
Small-diameter artificial vascular grafts (SDAVG) are used to bypass blood flow in arterial occlusive diseases such as coronary heart or peripheral arterial disease. However, SDAVGs are plagued by restenosis after a short while due to thrombosis and the thickening of the neointimal wall known as intimal hyperplasia (IH). The specific causes of IH have not yet been deduced; however, thrombosis formation due to bioincompatibility as well as a mismatch between the biomechanical properties of the SDAVG and the native artery has been attributed to its initiation. The main challenges that have been faced in fabricating SDAVGs are facilitating rapid re-endothelialization of the luminal surface of the SDAVG and replicating the complex viscoelastic behavior of the arteries. Recent strategies to combat IH formation have been mostly based on imitating the natural structure and function of the native artery (biomimicry). Thus, most recently, developed grafts contain a multilayered structure with a designated function for each layer. This paper reviews the current polymeric, biomimetic SDAVGs in preventing the formation of IH. The materials used in fabrication, challenges, and strategies employed to tackle IH are summarized and discussed, and we focus on the multilayered structure of current SDAVGs. Additionally, the future aspects in this area are pointed out for researchers to consider in their endeavor.
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Affiliation(s)
- Rumbidzai Zizhou
- Center
for Materials Innovation and Future Fashion (CMIFF), School of Fashion
and Textiles, RMIT University, Brunswick 3056, Australia
| | - Xin Wang
- Center
for Materials Innovation and Future Fashion (CMIFF), School of Fashion
and Textiles, RMIT University, Brunswick 3056, Australia
| | - Shadi Houshyar
- School
of Engineering, RMIT University, Melbourne 3000, Australia
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3
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Jeong ES, Park BH, Lee S, Jang JH. Construction and Evaluation of Recombinant Chimeric Fibrillin and Elastin Fragment in Human Mesenchymal Stem Cells. Protein Pept Lett 2021; 29:176-183. [PMID: 34875983 DOI: 10.2174/0929866528666211207110043] [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: 07/26/2021] [Revised: 10/14/2021] [Accepted: 10/22/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND Diverse extracellular matrix (ECM) proteins physically interact with stem cells and regulate stem cell function. However, the large molecular weight of the natural ECM renders large-scale fabrication of a similar functional structure challenging. OBJECTIVE The objective of this study was to construct a low molecular weight and multifunctional chimeric form of recombinant ECM to stimulate mesenchymal stem cell (MSC) for tissue repair. We engineered Fibrillin-1PF14 fused to an elastin-like polypeptide to develop a new biomimetic ECM for stem cell differentiation and investigated whether this recombinant chimeric Fibrillin-Elastin fragment (rcFE) was effective on human nasal inferior turbinate-derived mesenchymal stem cells (hTMSCs). METHODS hTMSCs were grown in the medium supplemented with rcFE, then the effect of the protein was confirmed through cell adhesion assay, proliferation assay, and real-time PCR. RESULTS rcFE enhanced the adhesion activity of hTMSCs by 2.7-fold at the optimal concentration, and the proliferation activity was 2.6-fold higher than that of the control group (non-treatment rcFE). In addition, when smooth muscle cell differentiation markers were identified by real-time PCR, Calponin increased about 6-fold, α-actin about 9-fold, and MYH11 about 10-fold compared to the control group. CONCLUSION Chimeric rcFE enhanced cellular functions such as cell adhesion, proliferation, and smooth muscle differentiation of hTMSCs, suggesting that the rcFE can facilitate the induction of tissue regeneration.
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Affiliation(s)
- Eui-Seung Jeong
- Department of Biochemistry, Inha University School of Medicine, Incheon 22212. Korea
| | - Bo-Hyun Park
- Department of Biochemistry, Inha University School of Medicine, Incheon 22212. Korea
| | - Sujin Lee
- Department of Biochemistry, Inha University School of Medicine, Incheon 22212. Korea
| | - Jun-Hyeog Jang
- Department of Biochemistry, Inha University School of Medicine, Incheon 22212. Korea
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4
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Govindarajan T, Shandas R. Microgrooves Encourage Endothelial Cell Adhesion and Organization on Shape-Memory Polymer Surfaces. ACS APPLIED BIO MATERIALS 2019; 2:1897-1906. [PMID: 35030679 DOI: 10.1021/acsabm.8b00833] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Cardiovascular stents have become the mainstay for treating coronary and other vascular diseases; however, the need for long-term anti-platelet therapies continues to drive research on novel materials and strategies to promote in situ endothelialization of these devices, which should decrease local thrombotic response. Shape-memory polymers (SMPs) have shown promise as polymer stents due to their self-deployment capabilities and vascular biocompatibility. We previously demonstrated isotropic endothelial cell adhesion on the unmodified surfaces of a family of SMPs previously developed by our group. Here, we evaluate whether endothelial cells align preferentially along microgrooved versus unpatterned surfaces of these SMPs. Results show that micropatterning SMP surfaces enhances natural surface hydrophobicity, which helps promote endothelial cell attachment and alignment along the grooves. With the addition of microgrooves to the SMP surface, this class of SMPs may provide an improved surface and material for next-generation blood-contacting devices.
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5
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Diaz Quiroz JF, Rodriguez PD, Erndt-Marino JD, Guiza V, Balouch B, Graf T, Reichert WM, Russell B, Höök M, Hahn MS. Collagen-Mimetic Proteins with Tunable Integrin Binding Sites for Vascular Graft Coatings. ACS Biomater Sci Eng 2018; 4:2934-2942. [DOI: 10.1021/acsbiomaterials.8b00070] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Juan Felipe Diaz Quiroz
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Patricia Diaz Rodriguez
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Josh D. Erndt-Marino
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Viviana Guiza
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Bailey Balouch
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Tyler Graf
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - William M. Reichert
- Department of Biomedical Engineering, Duke University, Durham, North Carolina 27708, United States
| | - Brooke Russell
- Institute of Biosciences and Technology, Texas A&M Health Science Center, College Station, Texas 77843, United States
| | - Magnus Höök
- Institute of Biosciences and Technology, Texas A&M Health Science Center, College Station, Texas 77843, United States
| | - Mariah S. Hahn
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
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6
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Adipurnama I, Yang MC, Ciach T, Butruk-Raszeja B. Surface modification and endothelialization of polyurethane for vascular tissue engineering applications: a review. Biomater Sci 2018; 5:22-37. [PMID: 27942617 DOI: 10.1039/c6bm00618c] [Citation(s) in RCA: 103] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Cardiovascular implants, especially vascular grafts made of synthetic polymers, find wide clinical applications in the treatment of cardiovascular diseases. However, cases of failure still exist, notably caused by restenosis and thrombus formation. Aiming to solve these problems, various approaches to surface modification of synthetic vascular grafts have been used to improve both the hemocompatibility and long-term patency of artificial vascular grafts. Surface modification using hydrophilic molecules can enhance hemocompatibility, but this may limit the initial vascular endothelial cell adhesion. Therefore, the improvement of endothelialization on these grafts with specific peptides and biomolecules is now an exciting field of research. In this review, several techniques to improve surface modification and endothelialization on vascular grafts, mainly polyurethane (PU) grafts, are summarized, together with the recent development and evolution of the different strategies: from the use of PEG, zwitterions, and polysaccharides to peptides and other biomolecules and genes; from in vitro endothelialization to in vivo endothelialization; and from bio-inert and bio-active to bio-mimetic approaches.
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Affiliation(s)
- Iman Adipurnama
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan.
| | - Ming-Chien Yang
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan.
| | - Tomasz Ciach
- Faculty of Chemical and Process Engineering, Warsaw University of Technology, Warsaw, Poland
| | - Beata Butruk-Raszeja
- Faculty of Chemical and Process Engineering, Warsaw University of Technology, Warsaw, Poland
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7
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8
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Alexander GC, Hwang PTJ, Chen J, Kim J, Brott BC, Yoon YS, Jun HW. Nanomatrix Coated Stent Enhances Endothelialization but Reduces Platelet, Smooth Muscle Cell, and Monocyte Adhesion under Physiologic Conditions. ACS Biomater Sci Eng 2017; 4:107-115. [PMID: 31538110 DOI: 10.1021/acsbiomaterials.7b00676] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Cardiovascular disease is presently the number one cause of death worldwide. Current stents used to treat cardiovascular disease have a litany of unacceptable shortcomings: adverse clinical events including restenosis, neointimal hyperplasia, thrombosis, inflammation, and poor re-endothelialization. We have developed a biocompatible, multifunctional, peptide amphiphile-based nanomatrix coating for stents. In this study, we evaluated the ability of the nanomatrix coated stent to simultaneously address the issues facing current stents under physiological flow conditions in vitro. We found that the nanomatrix coated stent could increase endothelial cell migration, adhesion, and proliferation (potential for re-endothelialization), discourage smooth muscle cell migration and adhesion (potential to reduce neointimal hyperplasia and restenosis), and decrease both platelet activation and adhesion (potential to prevent thrombosis) as well as monocyte adhesion (potential to attenuate inflammatory responses) under physiological flow conditions in vitro. These promising results demonstrate the potential clinical utility of this nanomatrix stent coating, and highlight the importance of biocompatibility, multifunctionality, and bioactivity in cardiovascular device design.
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Affiliation(s)
- G C Alexander
- Department of Biomedical Engineering, University of Alabama at Birmingham, 806 Shelby Building, 1825 University Boulevard, Birmingham, Alabama 35294, United States
| | - P T J Hwang
- Department of Biomedical Engineering, University of Alabama at Birmingham, 806 Shelby Building, 1825 University Boulevard, Birmingham, Alabama 35294, United States
| | - J Chen
- Department of Biomedical Engineering, University of Alabama at Birmingham, 806 Shelby Building, 1825 University Boulevard, Birmingham, Alabama 35294, United States
| | - J Kim
- Department of Medicine, Division of Endocrinology, Diabetes and Metabolism, University of Alabama at Birmingham, 806 Shelby Building, 1825 University Boulevard, Birmingham, Alabama 35294, United States
| | - B C Brott
- School of Medicine, Division of Cardiology, University of Alabama at Birmingham, 806 Shelby Building, 1825 University Boulevard, Birmingham, Alabama 35294, United States
| | - Y S Yoon
- School of Medicine, Division of Cardiology, Emory University, Atlanta, Georgia 30322, United States.,Severance Biomedical Science Institute, Yonsei University College of Medicine, Seoul 03722, Korea
| | - H-W Jun
- Department of Biomedical Engineering, University of Alabama at Birmingham, 806 Shelby Building, 1825 University Boulevard, Birmingham, Alabama 35294, United States
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9
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Govindarajan T, Shandas R. Shape Memory Polymers Containing Higher Acrylate Content Display Increased Endothelial Cell Attachment. Polymers (Basel) 2017; 9:572. [PMID: 29707382 PMCID: PMC5922786 DOI: 10.3390/polym9110572] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Accepted: 10/31/2017] [Indexed: 12/13/2022] Open
Abstract
Shape Memory Polymers (SMPs) are smart materials that can recall their shape upon the application of a stimulus, which makes them appealing materials for a variety of applications, especially in biomedical devices. Most prior SMP research has focused on tuning bulk properties; studying surface effects of SMPs may extend the use of these materials to blood-contacting applications, such as cardiovascular stents, where surfaces that support rapid endothelialization have been correlated to stent success. Here, we evaluate endothelial attachment onto the surfaces of a family of SMPs previously developed in our group that have shown promise for biomedical devices. Nine SMP formulations containing varying amounts of tert-Butyl acrylate (tBA) and Poly(ethylene glycol) dimethacrylate (PEGDMA) were analyzed for endothelial cell attachment. Dynamic mechanical analysis (DMA), contact angle studies, and atomic force microscopy (AFM) were used to verify bulk and surface properties of the SMPs. Human umbilical vein endothelial cell (HUVEC) attachment and viability was verified using fluorescent methods. Endothelial cells preferentially attached to SMPs with higher tBA content, which have rougher, more hydrophobic surfaces. HUVECs also displayed an increased metabolic activity on these high tBA SMPs over the course of the study. This class of SMPs may be promising candidates for next generation blood-contacting devices.
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Affiliation(s)
| | - Robin Shandas
- Department of Bioengineering, University of Colorado at Denver|Anschutz Medical Campus, Aurora, CO 80045, USA;
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10
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Kondyurina I, Wise SG, Ngo AKY, Filipe EC, Kondyurin A, Weiss AS, Bao S, Bilek MMM. Plasma mediated protein immobilisation enhances the vascular compatibility of polyurethane with tissue matched mechanical properties. Biomed Mater 2017; 12:045002. [DOI: 10.1088/1748-605x/aa6eb6] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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11
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Silk biomaterials functionalized with recombinant domain V of human perlecan modulate endothelial cell and platelet interactions for vascular applications. Colloids Surf B Biointerfaces 2016; 148:130-138. [DOI: 10.1016/j.colsurfb.2016.08.039] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Revised: 08/21/2016] [Accepted: 08/22/2016] [Indexed: 11/21/2022]
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12
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Development of UV cross-linked gelatin coated electrospun poly(caprolactone) fibrous scaffolds for tissue engineering. Int J Biol Macromol 2016; 93:1539-1548. [DOI: 10.1016/j.ijbiomac.2016.05.045] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Revised: 05/11/2016] [Accepted: 05/12/2016] [Indexed: 11/19/2022]
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13
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Santos M, Filipe EC, Michael PL, Hung J, Wise SG, Bilek MMM. Mechanically Robust Plasma-Activated Interfaces Optimized for Vascular Stent Applications. ACS APPLIED MATERIALS & INTERFACES 2016; 8:9635-9650. [PMID: 27015083 DOI: 10.1021/acsami.6b01279] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The long-term performance of many medical implants is limited by the use of inherently incompatible and bioinert materials. Metallic alloys, ceramics, and polymers commonly used in cardiovascular devices encourage clot formation and fail to promote the appropriate molecular signaling required for complete implant integration. Surface coating strategies have been proposed for these materials, but coronary stents are particularly problematic as the large surface deformations they experience in deployment require a mechanically robust coating interface. Here, we demonstrate a single-step ion-assisted plasma deposition process to tailor plasma-activated interfaces to meet current clinical demands for vascular implants. Using a process control-feedback strategy which predicts crucial coating growth mechanisms by adopting a suitable macroscopic plasma description in combination with noninvasive plasma diagnostics, we describe the optimal conditions to generate highly reproducible, industry-scalable stent coatings. These interfaces are mechanically robust, resisting delamination even upon plastic deformation of the underlying material, and were developed in consideration of the need for hemocompatibility and the capacity for biomolecule immobilization. Our optimized coating conditions combine the best mechanical properties with strong covalent attachment capacity and excellent blood compatibility in initial testing with plasma and whole blood, demonstrating the potential for improved vascular stent coatings.
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Affiliation(s)
- Miguel Santos
- Applied Materials Group, The Heart Research Institute , 7 Eliza Street, Newtown, New South Wales 2042, Australia
| | - Elysse C Filipe
- Applied Materials Group, The Heart Research Institute , 7 Eliza Street, Newtown, New South Wales 2042, Australia
| | - Praveesuda L Michael
- Applied Materials Group, The Heart Research Institute , 7 Eliza Street, Newtown, New South Wales 2042, Australia
| | - Juichien Hung
- Applied Materials Group, The Heart Research Institute , 7 Eliza Street, Newtown, New South Wales 2042, Australia
| | - Steven G Wise
- Applied Materials Group, The Heart Research Institute , 7 Eliza Street, Newtown, New South Wales 2042, Australia
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14
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Yu Y, Wise SG, Michael PL, Bax DV, Yuen GSC, Hiob MA, Yeo GC, Filipe EC, Dunn LL, Chan KH, Hajian H, Celermajer DS, Weiss AS, Ng MKC. Characterization of Endothelial Progenitor Cell Interactions with Human Tropoelastin. PLoS One 2015; 10:e0131101. [PMID: 26115013 PMCID: PMC4482626 DOI: 10.1371/journal.pone.0131101] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2013] [Accepted: 05/28/2015] [Indexed: 01/23/2023] Open
Abstract
The deployment of endovascular implants such as stents in the treatment of cardiovascular disease damages the vascular endothelium, increasing the risk of thrombosis and promoting neointimal hyperplasia. The rapid restoration of a functional endothelium is known to reduce these complications. Circulating endothelial progenitor cells (EPCs) are increasingly recognized as important contributors to device re-endothelialization. Extracellular matrix proteins prominent in the vessel wall may enhance EPC-directed re-endothelialization. We examined attachment, spreading and proliferation on recombinant human tropoelastin (rhTE) and investigated the mechanism and site of interaction. EPCs attached and spread on rhTE in a dose dependent manner, reaching a maximal level of 56±3% and 54±3%, respectively. EPC proliferation on rhTE was comparable to vitronectin, fibronectin and collagen. EDTA, but not heparan sulfate or lactose, reduced EPC attachment by 81±3%, while full attachment was recovered after add-back of manganese, inferring a classical integrin-mediated interaction. Integrin αVβ3 blocking antibodies decreased EPC adhesion and spreading on rhTE by 39±3% and 56±10% respectively, demonstrating a large contribution from this specific integrin. Attachment of EPCs on N-terminal rhTE constructs N25 and N18 accounted for most of this interaction, accompanied by comparable spreading. In contrast, attachment and spreading on N10 was negligible. αVβ3 blocking antibodies reduced EPC spreading on both N25 and N18 by 45±4% and 42±14%, respectively. In conclusion, rhTE supports EPC binding via an integrin mechanism involving αVβ3. N25 and N18, but not N10 constructs of rhTE contribute to EPC binding. The regulation of EPC activity by rhTE may have implications for modulation of the vascular biocompatibility of endovascular implants.
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Affiliation(s)
- Young Yu
- Department of Cardiology, Royal Prince Alfred Hospital, Sydney, NSW, 2050, Australia
- The Heart Research Institute, Sydney, NSW, 2042, Australia
- Sydney Medical School, University of Sydney, Sydney, NSW, 2006, Australia
| | - Steven G. Wise
- The Heart Research Institute, Sydney, NSW, 2042, Australia
- Sydney Medical School, University of Sydney, Sydney, NSW, 2006, Australia
- School of Molecular Bioscience, University of Sydney, Sydney, NSW, 2006, Australia
- * E-mail:
| | - Praveesuda L. Michael
- The Heart Research Institute, Sydney, NSW, 2042, Australia
- Sydney Medical School, University of Sydney, Sydney, NSW, 2006, Australia
| | - Daniel V. Bax
- School of Molecular Bioscience, University of Sydney, Sydney, NSW, 2006, Australia
| | - Gloria S. C. Yuen
- The Heart Research Institute, Sydney, NSW, 2042, Australia
- Sydney Medical School, University of Sydney, Sydney, NSW, 2006, Australia
| | - Matti A. Hiob
- The Heart Research Institute, Sydney, NSW, 2042, Australia
- Sydney Medical School, University of Sydney, Sydney, NSW, 2006, Australia
- School of Molecular Bioscience, University of Sydney, Sydney, NSW, 2006, Australia
| | - Giselle C. Yeo
- School of Molecular Bioscience, University of Sydney, Sydney, NSW, 2006, Australia
| | - Elysse C. Filipe
- The Heart Research Institute, Sydney, NSW, 2042, Australia
- Sydney Medical School, University of Sydney, Sydney, NSW, 2006, Australia
| | - Louise L. Dunn
- The Heart Research Institute, Sydney, NSW, 2042, Australia
- Sydney Medical School, University of Sydney, Sydney, NSW, 2006, Australia
| | - Kim H. Chan
- Department of Cardiology, Royal Prince Alfred Hospital, Sydney, NSW, 2050, Australia
- The Heart Research Institute, Sydney, NSW, 2042, Australia
- Sydney Medical School, University of Sydney, Sydney, NSW, 2006, Australia
| | - Hamid Hajian
- The Heart Research Institute, Sydney, NSW, 2042, Australia
- Sydney Medical School, University of Sydney, Sydney, NSW, 2006, Australia
| | - David S. Celermajer
- Department of Cardiology, Royal Prince Alfred Hospital, Sydney, NSW, 2050, Australia
- The Heart Research Institute, Sydney, NSW, 2042, Australia
- Sydney Medical School, University of Sydney, Sydney, NSW, 2006, Australia
| | - Anthony S. Weiss
- School of Molecular Bioscience, University of Sydney, Sydney, NSW, 2006, Australia
- Bosch Institute, University of Sydney, Sydney, NSW, 2006, Australia
- Charles Perkins Centre, University of Sydney, Sydney, NSW, 2006, Australia
| | - Martin K. C. Ng
- Department of Cardiology, Royal Prince Alfred Hospital, Sydney, NSW, 2050, Australia
- The Heart Research Institute, Sydney, NSW, 2042, Australia
- Sydney Medical School, University of Sydney, Sydney, NSW, 2006, Australia
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15
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Immobilisation of a fibrillin-1 fragment enhances the biocompatibility of PTFE. Colloids Surf B Biointerfaces 2014; 116:544-52. [DOI: 10.1016/j.colsurfb.2014.01.042] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2013] [Revised: 01/24/2014] [Accepted: 01/24/2014] [Indexed: 11/23/2022]
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16
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Wise SG, Waterhouse A, Kondyurin A, Bilek MM, Weiss AS. Plasma-based biofunctionalization of vascular implants. Nanomedicine (Lond) 2012; 7:1907-16. [DOI: 10.2217/nnm.12.161] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Polymeric and metallic materials are used extensively in permanently implanted cardiovascular devices and devices that make temporary but often prolonged contact with body fluids and tissues. Foreign body responses are typically triggered by host interactions at the implant surface, making surface modifications to increase biointegration desirable. Plasma-based treatments are extensively used to modify diverse substrates; modulating surface chemistry, wettability and surface roughness, as well as facilitating covalent biomolecule binding. Each aspect impacts on facets of vascular compatibility including endothelialization and blood contact. These modifications can be readily applied to polymers such as Dacron® and expanded polytetrafluoroethylene, which are widely used in bypass grafting and the metallic substrates of stents, valves and pacemaker components. Plasma modification of metals is more challenging given the need for coating deposition in addition to surface activation, adding the necessity for robust interface adhesion. This review examines the evolving plasma treatment technology facilitating the biofunctionalization of polymeric and metallic implantable cardiovascular materials.
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Affiliation(s)
- Steven G Wise
- School of Molecular Bioscience, University of Sydney, NSW 2006, Australia; School of Molecular Bioscience G08, University of Sydney, NSW 2006, Australia
- The Heart Research Institute, Sydney, NSW 2042, Australia
| | - Anna Waterhouse
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA 02115, USA
| | | | - Marcela M Bilek
- School of Physics, University of Sydney, NSW 2006, Australia
| | - Anthony S Weiss
- Bosch Institute, University of Sydney, Sydney, 2006, Australia
- Charles Perkins Centre, University of Sydney, Sydney, 2006, Australia
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