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Conner AA, David D, Yim EKF. The Effects of Biomimetic Surface Topography on Vascular Cells: Implications for Vascular Conduits. Adv Healthc Mater 2024:e2400335. [PMID: 38935920 DOI: 10.1002/adhm.202400335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2024] [Revised: 06/04/2024] [Indexed: 06/29/2024]
Abstract
Cardiovascular diseases (CVDs) are the leading cause of mortality worldwide and represent a pressing clinical need. Vascular occlusions are the predominant cause of CVD and necessitate surgical interventions such as bypass graft surgery to replace the damaged or obstructed blood vessel with a synthetic conduit. Synthetic small-diameter vascular grafts (sSDVGs) are desired to bypass blood vessels with an inner diameter <6 mm yet have limited use due to unacceptable patency rates. The incorporation of biophysical cues such as topography onto the sSDVG biointerface can be used to mimic the cellular microenvironment and improve outcomes. In this review, the utility of surface topography in sSDVG design is discussed. First, the primary challenges that sSDVGs face and the rationale for utilizing biomimetic topography are introduced. The current literature surrounding the effects of topographical cues on vascular cell behavior in vitro is reviewed, providing insight into which features are optimal for application in sSDVGs. The results of studies that have utilized topographically-enhanced sSDVGs in vivo are evaluated. Current challenges and barriers to clinical translation are discussed. Based on the wealth of evidence detailed here, substrate topography offers enormous potential to improve the outcome of sSDVGs and provide therapeutic solutions for CVDs.
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Affiliation(s)
- Abigail A Conner
- Department of Chemical Engineering, University of Waterloo, 200 University Avenue West, Waterloo, ON, N2L 3G1, Canada
| | - Dency David
- Department of Chemical Engineering, University of Waterloo, 200 University Avenue West, Waterloo, ON, N2L 3G1, Canada
| | - Evelyn K F Yim
- Department of Chemical Engineering, University of Waterloo, 200 University Avenue West, Waterloo, ON, N2L 3G1, Canada
- Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Avenue West, Waterloo, ON, N2L 3G1, Canada
- Center for Biotechnology and Bioengineering, University of Waterloo, 200 University Avenue West, Waterloo, ON, N2L 3G1, Canada
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2
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Bhattacharyya A, Barbee KA. Vascular endothelial cell morphology and alignment regulate VEGF-induced endothelial nitric oxide synthase activation. Cytoskeleton (Hoboken) 2024. [PMID: 38775643 DOI: 10.1002/cm.21872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 03/12/2024] [Accepted: 03/18/2024] [Indexed: 06/13/2024]
Abstract
Nitric oxide (NO) production by endothelial nitric oxide synthase (eNOS) inhibits platelet and leukocyte adhesion while promoting vasorelaxation in smooth muscle cells. Dysfunctional regulation of eNOS is a hallmark of various vascular pathologies, notably atherosclerosis, often associated with areas of low shear stress on endothelial cells (ECs). While the link between EC morphology and local hemodynamics is acknowledged, the specific impact of EC morphology on eNOS regulation remains unclear. Morphological differences between elongated, aligned ECs and polygonal, randomly oriented ECs correspond to variations in focal adhesion and cytoskeletal organization, suggesting differing levels of cytoskeletal prestress. However, the functional outcomes of cytoskeletal prestress, particularly in the absence of shear stress, are not extensively studied in ECs. Some evidence suggests that elongated ECs exhibit decreased immunogenicity and enhanced NO production. This study aims to elucidate the signaling pathways governing VEGF-stimulated eNOS regulation in the aligned EC phenotype characterized by elongated and aligned cells within a monolayer. Using anisotropic topographic cues, bovine aortic endothelial cells (BAECs) were elongated and aligned, followed by VEGF treatment in the presence or absence of cytoskeletal tension inhibitors. Phosphorylation of eNOS ser1179, AKT ser437 and FAK Tyr397 in response to VEGF challenge were significantly heightened in aligned ECs compared to unaligned ECs. Moreover this response proved to be robustly tied to cytoskeletal tension as evinced by the abrogation of responses in the presence of the myosin II ATPase inhibitor, blebbistatin. Notably, this work demonstrates for the first time the reliance on FAK phosphorylation in VEGF-mediated eNOS activation and the comparatively greater contribution of the cytoskeletal machinery in propagating VEGF-eNOS signaling in aligned and elongated ECs. This research underscores the importance of utilizing appropriate vascular models in drug development and sheds light on potential mechanisms underlying vascular function and pathology that can help inform vascular graft design.
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Affiliation(s)
- Aparna Bhattacharyya
- School of Biomedical Engineering, Science, and Health Systems, Drexel University, Philadelphia, Pennsylvania, USA
| | - Kenneth A Barbee
- School of Biomedical Engineering, Science, and Health Systems, Drexel University, Philadelphia, Pennsylvania, USA
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3
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Mirhosseini N, Li L, Liu Z, Mamas M, Fraser D, Wang T. A comparison of endothelial cell growth on commercial coronary stents with and without laser surface texturing. Heliyon 2024; 10:e26425. [PMID: 38434339 PMCID: PMC10906303 DOI: 10.1016/j.heliyon.2024.e26425] [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: 07/24/2023] [Revised: 02/12/2024] [Accepted: 02/13/2024] [Indexed: 03/05/2024] Open
Abstract
Complete endothelialisation of coronary stents is an important determinant of future thrombotic complications following coronary stenting. Stent surface texture is an important factor that influences endothelial cell growth. With the emergence of second and third generation coronary stents, is limited comparative data describing endothelial cell growth in contemporary stent platforms, and limited data available on approaches used to rapidly modify the surfaces of commercial coronary stents to improve endothelialisation. In this study we have determined the in vitro proliferation of the primary human coronary artery endothelial cells on the commonly used 4 types of commercial coronary stents and found that the inner surface of BioMatrix drug-eluting stents (DES), after eliminating of the polymer and drug coating, had significantly higher endothelial cell proliferation compared to that of other bare metal stents (BMS): Multi-Link8, Integrity and Omega. The surfaces of the 3 types of BMS which are smooth, displayed similar endothelial cell proliferation, suggesting the importance of surface features in manipulating endothelial cell growth. Laser surface texturing was used to create micro/nano patterns on the stents. The laser treatment has significantly increased endothelial proliferation on the inner surfaces of all 4 types of stents, and Multi-Link8 stents displayed the highest (>100%) improvement. The laser textured BioMatrix stents had the highest absolute number of endothelial cells growth. Our results provided useful information in the endothelialisation potential for the commonly used commercial coronary stents and suggested a potential future application of laser surface bioengineering to coronary stents for better biocompatibility of the device.
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Affiliation(s)
- Nazanin Mirhosseini
- Engineering Building A, 4th Floor Core 1, Department of Engineering for Sustainability, School of Engineering, Faculty of Science and Engineering, The University of Manchester, Manchester, M13 9PL, UK
| | - Lin Li
- Department of Engineering for Sustainability, School of Engineering, The University of Manchester, Manchester, M13 9PL, UK
| | - Zhu Liu
- Research Centre for Laser Extreme Manufacturing, Ningbo Institute of Materials Engineering and Technology, Chinese Academy of Science, Ningbo, China
| | - Mamas Mamas
- Cardiovascular Research Group, Institute of Science and Technology in Medicine, University of Keele, Stoke-on-Trent, and Royal Stoke Hospital, Stoke-on-Trent, UK
| | - Douglas Fraser
- Manchester Heart Centre, Manchester Royal Infirmary, Oxford Road, Manchester, M13 9WL, UK
| | - Tao Wang
- AV Hill Building, Faculty of Biology, Medicine and Health, The University of Manchester, Upper Brook Street, Manchester, M13 9PT, UK
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4
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Exarchos V, Zacharova E, Neuber S, Giampietro C, Motta SE, Hinkov H, Emmert MY, Nazari-Shafti TZ. The path to a hemocompatible cardiovascular implant: Advances and challenges of current endothelialization strategies. Front Cardiovasc Med 2022; 9:971028. [PMID: 36186971 PMCID: PMC9515323 DOI: 10.3389/fcvm.2022.971028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Accepted: 08/01/2022] [Indexed: 11/13/2022] Open
Abstract
Cardiovascular (CV) implants are still associated with thrombogenicity due to insufficient hemocompatibility. Endothelialization of their luminal surface is a promising strategy to increase their hemocompatibility. In this review, we provide a collection of research studies and review articles aiming to summarize the recent efforts on surface modifications of CV implants, including stents, grafts, valves, and ventricular assist devises. We focus in particular on the implementation of micrometer or nanoscale surface modifications, physical characteristics of known biomaterials (such as wetness and stiffness), and surface morphological features (such as gratings, fibers, pores, and pits). We also review how biomechanical signals originating from the endothelial cell for surface interaction can be directed by topography engineering approaches toward the survival of the endothelium and its long-term adaptation. Finally, we summarize the regulatory and economic challenges that may prevent clinical implementation of endothelialized CV implants.
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Affiliation(s)
- Vasileios Exarchos
- Cardiosurgical Research Group, Department of Cardiothoracic and Vascular Surgery, German Heart Center Berlin, Berlin, Germany
- Translational Cardiovascular Regenerative Technologies Group, Berlin Institute of Health at Charité – Universitätsmedizin Berlin, BIH Center for Regenerative Therapies, Berlin, Germany
| | - Ema Zacharova
- Cardiosurgical Research Group, Department of Cardiothoracic and Vascular Surgery, German Heart Center Berlin, Berlin, Germany
- Translational Cardiovascular Regenerative Technologies Group, Berlin Institute of Health at Charité – Universitätsmedizin Berlin, BIH Center for Regenerative Therapies, Berlin, Germany
- Department of Life Sciences, IMC University of Applied Sciences Krems, Krems an der Donau, Austria
| | - Sebastian Neuber
- Cardiosurgical Research Group, Department of Cardiothoracic and Vascular Surgery, German Heart Center Berlin, Berlin, Germany
- Translational Cardiovascular Regenerative Technologies Group, Berlin Institute of Health at Charité – Universitätsmedizin Berlin, BIH Center for Regenerative Therapies, Berlin, Germany
| | - Costanza Giampietro
- Experimental Continuum Mechanics, Empa Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, Switzerland
- Department of Mechanical and Process Engineering, Institute for Mechanical Systems, ETH Zürich, Zurich, Switzerland
| | - Sarah E. Motta
- Institute for Regenerative Medicine, University of Zurich, Zurich, Switzerland
| | - Hristian Hinkov
- Cardiosurgical Research Group, Department of Cardiothoracic and Vascular Surgery, German Heart Center Berlin, Berlin, Germany
- Translational Cardiovascular Regenerative Technologies Group, Berlin Institute of Health at Charité – Universitätsmedizin Berlin, BIH Center for Regenerative Therapies, Berlin, Germany
| | - Maximilian Y. Emmert
- Cardiosurgical Research Group, Department of Cardiothoracic and Vascular Surgery, German Heart Center Berlin, Berlin, Germany
- Translational Cardiovascular Regenerative Technologies Group, Berlin Institute of Health at Charité – Universitätsmedizin Berlin, BIH Center for Regenerative Therapies, Berlin, Germany
- Institute for Regenerative Medicine, University of Zurich, Zurich, Switzerland
- Clinic for Cardiovascular Surgery, Charité – Universitätsmedizin Berlin, Berlin, Germany
- Department of Health Sciences and Technology, ETH Zürich, Zurich, Switzerland
| | - Timo Z. Nazari-Shafti
- Cardiosurgical Research Group, Department of Cardiothoracic and Vascular Surgery, German Heart Center Berlin, Berlin, Germany
- Translational Cardiovascular Regenerative Technologies Group, Berlin Institute of Health at Charité – Universitätsmedizin Berlin, BIH Center for Regenerative Therapies, Berlin, Germany
- Berlin Institute of Health at Charité – Universitätsmedizin Berlin, BIH Biomedical Innovation Academy, BIH Charité (Junior) (Digital) Clinician Scientist Program, Berlin, Germany
- *Correspondence: Timo Z. Nazari-Shafti,
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5
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Nandan S, Schiavi-Tritz J, Hellmuth R, Dunlop C, Vaughan TJ, Dolan EB. Design and Verification of a Novel Perfusion Bioreactor to Evaluate the Performance of a Self-Expanding Stent for Peripheral Artery Applications. FRONTIERS IN MEDICAL TECHNOLOGY 2022; 4:886458. [PMID: 35800467 PMCID: PMC9253816 DOI: 10.3389/fmedt.2022.886458] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Accepted: 05/19/2022] [Indexed: 11/13/2022] Open
Abstract
Endovascular stenting presents a promising approach to treat peripheral artery stenosis. However, a significant proportion of patients require secondary interventions due to complications such as in-stent restenosis and late stent thrombosis. Clinical failure of stents is not only attributed to patient factors but also on endothelial cell (EC) injury response, stent deployment techniques, and stent design. Three-dimensional in vitro bioreactor systems provide a valuable testbed for endovascular device assessment in a controlled environment replicating hemodynamic flow conditions found in vivo. To date, very few studies have verified the design of bioreactors based on applied flow conditions and their impact on wall shear stress, which plays a key role in the development of vascular pathologies. In this study, we develop a computationally informed bioreactor capable of capturing responses of human umbilical vein endothelial cells seeded on silicone tubes subjected to hemodynamic flow conditions and deployment of a self-expanding nitinol stents. Verification of bioreactor design through computational fluid dynamics analysis confirmed the application of pulsatile flow with minimum oscillations. EC responses based on morphology, nitric oxide (NO) release, metabolic activity, and cell count on day 1 and day 4 verified the presence of hemodynamic flow conditions. For the first time, it is also demonstrated that the designed bioreactor is capable of capturing EC responses to stent deployment beyond a 24-hour period with this testbed. A temporal investigation of EC responses to stent implantation from day 1 to day 4 showed significantly lower metabolic activity, EC proliferation, no significant changes to NO levels and EC's aligning locally to edges of stent struts, and random orientation in between the struts. These EC responses were indicative of stent-induced disturbances to local hemodynamics and sustained EC injury response contributing to neointimal growth and development of in-stent restenosis. This study presents a novel computationally informed 3D in vitro testbed to evaluate stent performance in presence of hemodynamic flow conditions found in native peripheral arteries and could help to bridge the gap between the current capabilities of 2D in vitro cell culture models and expensive pre-clinical in vivo models.
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Affiliation(s)
- Swati Nandan
- Biomedical Engineering and Biomechanics Research Centre (BioMEC), School of Engineering, College of Science and Engineering, National University of Ireland Galway, Galway, Ireland
- Vascular Flow Technology, Dundee, United Kingdom
| | - Jessica Schiavi-Tritz
- Biomedical Engineering and Biomechanics Research Centre (BioMEC), School of Engineering, College of Science and Engineering, National University of Ireland Galway, Galway, Ireland
| | | | - Craig Dunlop
- Vascular Flow Technology, Dundee, United Kingdom
| | - Ted J. Vaughan
- Biomedical Engineering and Biomechanics Research Centre (BioMEC), School of Engineering, College of Science and Engineering, National University of Ireland Galway, Galway, Ireland
- *Correspondence: Ted J. Vaughan
| | - Eimear B. Dolan
- Biomedical Engineering and Biomechanics Research Centre (BioMEC), School of Engineering, College of Science and Engineering, National University of Ireland Galway, Galway, Ireland
- Eimear B. Dolan
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6
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Dynamics of Endothelial Engagement and Filopodia Formation in Complex 3D Microscaffolds. Int J Mol Sci 2022; 23:ijms23052415. [PMID: 35269558 PMCID: PMC8910162 DOI: 10.3390/ijms23052415] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Revised: 02/08/2022] [Accepted: 02/16/2022] [Indexed: 11/28/2022] Open
Abstract
The understanding of endothelium–extracellular matrix interactions during the initiation of new blood vessels is of great medical importance; however, the mechanobiological principles governing endothelial protrusive behaviours in 3D microtopographies remain imperfectly understood. In blood capillaries submitted to angiogenic factors (such as vascular endothelial growth factor, VEGF), endothelial cells can transiently transdifferentiate in filopodia-rich cells, named tip cells, from which angiogenesis processes are locally initiated. This protrusive state based on filopodia dynamics contrasts with the lamellipodia-based endothelial cell migration on 2D substrates. Using two-photon polymerization, we generated 3D microstructures triggering endothelial phenotypes evocative of tip cell behaviour. Hexagonal lattices on pillars (“open”), but not “closed” hexagonal lattices, induced engagement from the endothelial monolayer with the generation of numerous filopodia. The development of image analysis tools for filopodia tracking allowed to probe the influence of the microtopography (pore size, regular vs. elongated structures, role of the pillars) on orientations, engagement and filopodia dynamics, and to identify MLCK (myosin light-chain kinase) as a key player for filopodia-based protrusive mode. Importantly, these events occurred independently of VEGF treatment, suggesting that the observed phenotype was induced through microtopography. These microstructures are proposed as a model research tool for understanding endothelial cell behaviour in 3D fibrillary networks.
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7
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Nguyen DT, Smith AF, Jiménez JM. Stent strut streamlining and thickness reduction promote endothelialization. J R Soc Interface 2021; 18:20210023. [PMID: 34404229 PMCID: PMC8371379 DOI: 10.1098/rsif.2021.0023] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Accepted: 07/22/2021] [Indexed: 12/15/2022] Open
Abstract
Stent thrombosis (ST) carries a high risk of myocardial infarction and death. Lack of endothelial coverage is an important prognostic indicator of ST after stenting. While stent strut thickness is a critical factor in ST, a mechanistic understanding of its effect is limited and the role of haemodynamics is unclear. Endothelialization was tested using a wound-healing assay and five different stent strut models ranging in height between 50 and 150 µm for circular arc (CA) and rectangular (RT) geometries and a control without struts. Under static conditions, all stent strut surfaces were completely endothelialized. Reversing pulsatile disturbed flow caused full endothelialization, except for the stent strut surfaces of the 100 and 150 µm RT geometries, while fully antegrade pulsatile undisturbed flow with a higher mean wall shear stress caused only the control and the 50 µm CA geometries to be fully endothelialized. Modest streamlining and decrease in height of the stent struts improved endothelial coverage of the peri-strut and stent strut surfaces in a haemodynamics dependent manner. This study highlights the impact of the stent strut height (thickness) and geometry (shape) on the local haemodynamics, modulating reendothelialization after stenting, an important factor in reducing the risk of stent thrombosis.
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Affiliation(s)
- Duy T. Nguyen
- Department of Mechanical and Industrial Engineering, University of Massachusetts Amherst, Amherst, MA 01003, USA
| | - Alexander F. Smith
- Department of Biomedical Engineering, University of Massachusetts Amherst, Amherst, MA 01003, USA
| | - Juan M. Jiménez
- Department of Mechanical and Industrial Engineering, University of Massachusetts Amherst, Amherst, MA 01003, USA
- Department of Biomedical Engineering, University of Massachusetts Amherst, Amherst, MA 01003, USA
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8
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Leclech C, Natale CF, Barakat AI. The basement membrane as a structured surface - role in vascular health and disease. J Cell Sci 2020; 133:133/18/jcs239889. [PMID: 32938688 DOI: 10.1242/jcs.239889] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The basement membrane (BM) is a thin specialized extracellular matrix that functions as a cellular anchorage site, a physical barrier and a signaling hub. While the literature on the biochemical composition and biological activity of the BM is extensive, the central importance of the physical properties of the BM, most notably its mechanical stiffness and topographical features, in regulating cellular function has only recently been recognized. In this Review, we focus on the biophysical attributes of the BM and their influence on cellular behavior. After a brief overview of the biochemical composition, assembly and function of the BM, we describe the mechanical properties and topographical structure of various BMs. We then focus specifically on the vascular BM as a nano- and micro-scale structured surface and review how its architecture can modulate endothelial cell structure and function. Finally, we discuss the pathological ramifications of the biophysical properties of the vascular BM and highlight the potential of mimicking BM topography to improve the design of implantable endovascular devices and advance the burgeoning field of vascular tissue engineering.
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Affiliation(s)
- Claire Leclech
- Hydrodynamics Laboratory, CNRS UMR7646, Ecole Polytechnique, Palaiseau, France
| | - Carlo F Natale
- Hydrodynamics Laboratory, CNRS UMR7646, Ecole Polytechnique, Palaiseau, France.,Interdisciplinary Research Centre on Biomaterials (CRIB), University of Naples Federico II, Naples, Italy
| | - Abdul I Barakat
- Hydrodynamics Laboratory, CNRS UMR7646, Ecole Polytechnique, Palaiseau, France
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9
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Natale CF, Lafaurie-Janvore J, Ventre M, Babataheri A, Barakat AI. Focal adhesion clustering drives endothelial cell morphology on patterned surfaces. J R Soc Interface 2019; 16:20190263. [PMID: 31480922 DOI: 10.1098/rsif.2019.0263] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
In many cell types, shape and function are intertwined. In vivo, vascular endothelial cells (ECs) are typically elongated and aligned in the direction of blood flow; however, near branches and bifurcations where atherosclerosis develops, ECs are often cuboidal and have no preferred orientation. Thus, understanding the factors that regulate EC shape and alignment is important. In vitro, EC morphology and orientation are exquisitely sensitive to the composition and topography of the substrate on which the cells are cultured; however, the underlying mechanisms remain poorly understood. Different strategies of substrate patterning for regulating EC shape and orientation have been reported including adhesive motifs on planar surfaces and micro- or nano-scale gratings that provide substrate topography. Here, we explore how ECs perceive planar bio-adhesive versus microgrooved topographic surfaces having identical feature dimensions. We show that while the two types of patterned surfaces are equally effective in guiding and directing EC orientation, the cells are considerably more elongated on the planar patterned surfaces than on the microgrooved surfaces. We also demonstrate that the key factor that regulates cellular morphology is focal adhesion clustering which subsequently drives cytoskeletal organization. The present results promise to inform design strategies of novel surfaces for the improved performance of implantable cardiovascular devices.
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Affiliation(s)
- C F Natale
- Hydrodynamics Laboratory, Ecole Polytechnique, CNRS UMR7646, Palaiseau, France.,Interdisciplinary Research Centre on Biomedical Materials (CRIB), University of Naples Federico II, Naples 80125, Italy
| | - J Lafaurie-Janvore
- Hydrodynamics Laboratory, Ecole Polytechnique, CNRS UMR7646, Palaiseau, France
| | - M Ventre
- Interdisciplinary Research Centre on Biomedical Materials (CRIB), University of Naples Federico II, Naples 80125, Italy.,Department of Chemical, Materials and Industrial Production Engineering, University of Naples Federico II, Italy
| | - A Babataheri
- Hydrodynamics Laboratory, Ecole Polytechnique, CNRS UMR7646, Palaiseau, France
| | - A I Barakat
- Hydrodynamics Laboratory, Ecole Polytechnique, CNRS UMR7646, Palaiseau, France.,School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, Australia
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10
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Xu WY, Tang WL, Yuan M, Sun Y, Xu F, Peng F. The Adverse Events Rate of Endothelial Progenitor Cell Capturing Stent in the Treatment of CAD Patients. Comb Chem High Throughput Screen 2019; 21:725-733. [PMID: 30698109 DOI: 10.2174/1386207322666190129113448] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Revised: 09/11/2018] [Accepted: 11/02/2018] [Indexed: 11/22/2022]
Abstract
BACKGROUND Circulating endothelial progenitor cells (EPCs) have regenerative capacities and play an important role in vessel wall homeostasis. When attracted to the site of vessel wall injury, EPCs rapidly differentiate into a functional layer as part of the healing process. The Genous TM endothelial progenitor cell (EPC) capturing stent is coated with anti-human CD34+ antibodies which combine with circulating EPCs from the peripheral blood to the stent surface. OBJECTIVE This meta-analysis aims to explore the Genous TM endothelial progenitor cell capturing stent in coronary artery disease (CAD) adverse event rate after one-year follow-up. METHODS PubMed, EMBASE and, Google Scholar databases were searched for eligible studies. CAD survival data and clinicopathological features were analyzed by expected shortfall (ES) and 95% CI. Fixed-effect model and random-effect model are used for summary statistics. RESULTS 12 studies, including 15985 coronary artery disease (CAD) patients who received PCI treatment were included in this study. After 1-year follow-up, the rate of adverse event showed that the target vessel failure (TVF) was 8.5% (7.6%-17.4%), target vessel revascularization was 4.1% (TVR, 0-15.6%), target lesion revascularization was 4.2% (TLR, 3.7%-22%), myocardial infarction was 2.0% (MI, 1.8%-5.2%), major adverse cardiac events was 8.7% (MACE, 6.4%-28%), and the all-cause death was 4.0% (0-9.2). CONCLUSION After one-year follow-up, the incidence rate of Genous stent adverse events was stable in CAD patients. The study showed a better evaluation of Genous stent, and it provides a better reference for CAD clinical treatment.
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Affiliation(s)
- Wei-Yuan Xu
- Department of Cardiology, Shaoxing People's Hospital (Shaoxing Hospital of Zhejiang University), Shaoxing, Zhejiang 312000, China
| | - Wei-Liang Tang
- Department of Cardiology, Shaoxing People's Hospital (Shaoxing Hospital of Zhejiang University), Shaoxing, Zhejiang 312000, China
| | - Min Yuan
- Department of Cardiology, Shaoxing People's Hospital (Shaoxing Hospital of Zhejiang University), Shaoxing, Zhejiang 312000, China
| | - Yong Sun
- Department of Cardiology, Shaoxing People's Hospital (Shaoxing Hospital of Zhejiang University), Shaoxing, Zhejiang 312000, China
| | - Feng Xu
- Department of Cardiology, Shaoxing People's Hospital (Shaoxing Hospital of Zhejiang University), Shaoxing, Zhejiang 312000, China
| | - Fang Peng
- Department of Cardiology, Shaoxing People's Hospital (Shaoxing Hospital of Zhejiang University), Shaoxing, Zhejiang 312000, China
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11
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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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12
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Pacharra S, Ortiz R, McMahon S, Wang W, Viebahn R, Salber J, Quintana I. Surface patterning of a novel PEG-functionalized poly-l-lactide polymer to improve its biocompatibility: Applications to bioresorbable vascular stents. J Biomed Mater Res B Appl Biomater 2018; 107:624-634. [PMID: 30091510 PMCID: PMC6585964 DOI: 10.1002/jbm.b.34155] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Revised: 04/03/2018] [Accepted: 04/22/2018] [Indexed: 12/21/2022]
Abstract
Today, research in the field of bioresorbable vascular stents (BVS) not only focusses on a new material being nontoxic but also tries to enhance its biocompatibility in terms of endothelialization potential and hemocompatibility. To this end, we used picosecond laser ablation technology as a single‐step and contactless method for surface microstructuring of a bioresorbable polymer which can be utilized in stent manufacture. The method works on all materials via fast material removal, can be easily adapted for micropatterning of tubular or more complex sample shapes and scaled up by means of micropatterning of metal molds for manufacturing. Here, picosecond laser ablation was applied to a bioresorbable, biologically inactive and polyethylene glycol‐modified poly‐l‐lactide polymer (PEGylated PLLA) to generate parallel microgrooves with varying geometries. The different patterns were thoroughly evaluated by a series of cyto‐ and hemocompatibility tests revealing that all surfaces were non‐toxic and non‐hemolytic. More importantly, patterns with 20 to 25 µm wide and 6 to 7 µm deep grooves significantly enhanced endothelial cell adhesion in comparison to samples with smaller grooves. Here, human cardiac microvascular endothelial cells were found to align along the groove direction, which is thought to encourage endothelialization of intraluminal surfaces of BVS. © 2018 The Authors Journal of Biomedical Materials Research Part B: Applied Biomaterials Published by Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater 00B: 000–000, 2018. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater 107B: 624–634, 2019.
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Affiliation(s)
- Sandra Pacharra
- Zentrum für klinische Forschung, Ruhr-Universität Bochum, Bochum, Germany.,Universitätsklinikum Knappschaftskrankenhaus, Chirurgische Klinik, Bochum, Germany
| | - Rocio Ortiz
- Ultraprecision Processes Unit, IK4-TEKNIKER Technological Research Center, Eibar, Gipuzkoa, Spain
| | - Sean McMahon
- Vornia Ltd, Laboratory A, Synergy Centre, Tallaght, Dublin, Ireland.,The Charles Institute of Dermatology, School of Medicine and Medical Science, University College, Dublin, Dublin, Ireland
| | - Wenxin Wang
- Vornia Ltd, Laboratory A, Synergy Centre, Tallaght, Dublin, Ireland.,The Charles Institute of Dermatology, School of Medicine and Medical Science, University College, Dublin, Dublin, Ireland
| | - Richard Viebahn
- Zentrum für klinische Forschung, Ruhr-Universität Bochum, Bochum, Germany.,Universitätsklinikum Knappschaftskrankenhaus, Chirurgische Klinik, Bochum, Germany
| | - Jochen Salber
- Zentrum für klinische Forschung, Ruhr-Universität Bochum, Bochum, Germany.,Universitätsklinikum Knappschaftskrankenhaus, Chirurgische Klinik, Bochum, Germany
| | - Iban Quintana
- Ultraprecision Processes Unit, IK4-TEKNIKER Technological Research Center, Eibar, Gipuzkoa, Spain
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13
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Formation of microcapsules by ultrasound stimulation for use in remote-controlled drug-eluting stents. Med Eng Phys 2018; 56:42-47. [DOI: 10.1016/j.medengphy.2018.04.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Revised: 03/29/2018] [Accepted: 04/08/2018] [Indexed: 01/15/2023]
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14
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Szustakiewicz K, Stępak B, Antończak A, Maj M, Gazińska M, Kryszak B, Pigłowski J. Femtosecond laser-induced modification of PLLA/hydroxyapatite composite. Polym Degrad Stab 2018. [DOI: 10.1016/j.polymdegradstab.2018.01.015] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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15
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Cutiongco MFA, Chua BMX, Neo DJH, Rizwan M, Yim EKF. Functional differences between healthy and diabetic endothelial cells on topographical cues. Biomaterials 2018; 153:70-84. [PMID: 29125983 PMCID: PMC5724387 DOI: 10.1016/j.biomaterials.2017.10.037] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Revised: 10/04/2017] [Accepted: 10/20/2017] [Indexed: 12/23/2022]
Abstract
The endothelial lining of blood vessels is severely affected in type II diabetes. Yet, there is still a paucity on the use of diabetic endothelial cells for study and assessment of implantable devices targeting vascular disease. This critically impairs our ability to determine appropriate topographical cues to be included in implantable devices that can be used to maintain or improve endothelial cell function in vivo. Here, the functional responses of healthy and diabetic human coronary arterial endothelial cells were studied and observed to differ depending on topography. Gratings (2 μm) maintained normal endothelial functions such as adhesiveness, angiogenic capacity and cell-cell junction formation, and reduced immunogenicity of healthy cells. However, a significant and consistent effect was not observed in diabetic cells. Instead, diabetic endothelial cells cultured on the perpendicularly aligned multi-scale hierarchical gratings (250 nm gratings on 2 μm gratings) drastically reduced the uptake of oxidized low-density lipoprotein, decreased immune activation, and accelerated cell migration. Concave microlens (1.8 μm diameter) topography was additionally observed to overwhelmingly deteriorate diabetic endothelial cell function. The results of this study support a new paradigm and approach in the design and testing of implantable devices and biomedical interventions for diabetic patients.
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Affiliation(s)
- Marie F A Cutiongco
- Mechanobiology Institute, National University of Singapore, T-Lab, #10-01, 5A Engineering Drive 1, Singapore, 117411; Department of Biomedical Engineering, Block E4 #04-08, 4 Engineering Drive 3, National University of Singapore, 117583, Singapore
| | - Bryan M X Chua
- Department of Biomedical Engineering, Block E4 #04-08, 4 Engineering Drive 3, National University of Singapore, 117583, Singapore
| | - Dawn J H Neo
- Mechanobiology Institute, National University of Singapore, T-Lab, #10-01, 5A Engineering Drive 1, Singapore, 117411
| | - Muhammad Rizwan
- Department of Chemical Engineering, University of Waterloo, 200 University Avenue West, Waterloo, Ontario, Canada, N2L 3G1
| | - Evelyn K F Yim
- Mechanobiology Institute, National University of Singapore, T-Lab, #10-01, 5A Engineering Drive 1, Singapore, 117411; Department of Biomedical Engineering, Block E4 #04-08, 4 Engineering Drive 3, National University of Singapore, 117583, Singapore; Department of Surgery, National University of Singapore, Singapore; Department of Chemical Engineering, University of Waterloo, 200 University Avenue West, Waterloo, Ontario, Canada, N2L 3G1.
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16
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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: 6] [Impact Index Per Article: 0.9] [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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17
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Huang X, Shan L, Cheng K, Weng W. Cytocompatibility of Titanium Microsphere-Based Surfaces. ACS Biomater Sci Eng 2017; 3:3254-3260. [DOI: 10.1021/acsbiomaterials.7b00551] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xiaoxiao Huang
- School
of Materials Science and Engineering, State Key Laboratory of Silicon
Materials, Zhejiang University, Hangzhou 310027, China
| | - Lijun Shan
- Department
of Chemical and Process Engineering, Faculty of Engineering and Built
Environment, University Kebangsaan Malaysia, Bangi, Malaysia
| | - Kui Cheng
- School
of Materials Science and Engineering, State Key Laboratory of Silicon
Materials, Zhejiang University, Hangzhou 310027, China
| | - Wenjian Weng
- School
of Materials Science and Engineering, State Key Laboratory of Silicon
Materials, Zhejiang University, Hangzhou 310027, China
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18
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Schieber R, Lasserre F, Hans M, Fernández-Yagüe M, Díaz-Ricart M, Escolar G, Ginebra MP, Mücklich F, Pegueroles M. Direct Laser Interference Patterning of CoCr Alloy Surfaces to Control Endothelial Cell and Platelet Response for Cardiovascular Applications. Adv Healthc Mater 2017; 6. [PMID: 28714577 DOI: 10.1002/adhm.201700327] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Revised: 06/02/2017] [Indexed: 11/09/2022]
Abstract
The main drawbacks of cardiovascular bare-metal stents (BMS) are in-stent restenosis and stent thrombosis as a result of an incomplete endothelialization after stent implantation. Nano- and microscale modification of implant surfaces is a strategy to recover the functionality of the artery by stimulating and guiding molecular and biological processes at the implant/tissue interface. In this study, cobalt-chromium (CoCr) alloy surfaces are modified via direct laser interference patterning (DLIP) in order to create linear patterning onto CoCr surfaces with different periodicities (≈3, 10, 20, and 32 µm) and depths (≈20 and 800 nm). Changes in surface topography, chemistry, and wettability are thoroughly characterized before and after modification. Human umbilical vein endothelial cells' adhesion and spreading are similar for all patterned and plain CoCr surfaces. Moreover, high-depth series induce cell elongation, alignment, and migration along the patterned lines. Platelet adhesion and aggregation decrease in all patterned surfaces compared to CoCr control, which is associated with changes in wettability and oxide layer characteristics. Cellular studies provide evidence of the potential of DLIP topographies to foster endothelialization without enhancement of platelet adhesion, which will be of high importance when designing new BMS in the future.
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Affiliation(s)
- Romain Schieber
- Biomaterials, Biomechanics and Tissue Engineering Group; Department of Materials Science and Metallurgical Engineering; Technical University of Catalonia (UPC), EEBE; 08019, Av. Eduard Maristany 10-14 08019 Barcelona Spain
- Centre for Research in NanoEngineering (CRNE); UPC, EEBE; Av. Eduard Maristany 10-14 08019 Barcelona Spain
- Chair of Functional Materials; Faculty of Natural Sciences and Technology; Saarland University; 66123 Saarbrücken Germany
| | - Federico Lasserre
- Chair of Functional Materials; Faculty of Natural Sciences and Technology; Saarland University; 66123 Saarbrücken Germany
| | - Michael Hans
- Chair of Functional Materials; Faculty of Natural Sciences and Technology; Saarland University; 66123 Saarbrücken Germany
| | - Marc Fernández-Yagüe
- Biomaterials, Biomechanics and Tissue Engineering Group; Department of Materials Science and Metallurgical Engineering; Technical University of Catalonia (UPC), EEBE; 08019, Av. Eduard Maristany 10-14 08019 Barcelona Spain
- Centre for Research in NanoEngineering (CRNE); UPC, EEBE; Av. Eduard Maristany 10-14 08019 Barcelona Spain
| | - Maribel Díaz-Ricart
- Hemotherapy-Hemostasis Department; Centre de Diagnòstic Biomèdic; Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS); Hospital Clínic Universitat de Barcelona; 08036 Barcelona Spain
| | - Ginés Escolar
- Hemotherapy-Hemostasis Department; Centre de Diagnòstic Biomèdic; Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS); Hospital Clínic Universitat de Barcelona; 08036 Barcelona Spain
| | - Maria-Pau Ginebra
- Biomaterials, Biomechanics and Tissue Engineering Group; Department of Materials Science and Metallurgical Engineering; Technical University of Catalonia (UPC), EEBE; 08019, Av. Eduard Maristany 10-14 08019 Barcelona Spain
- Centre for Research in NanoEngineering (CRNE); UPC, EEBE; Av. Eduard Maristany 10-14 08019 Barcelona Spain
- Institute for Bioengineering of Catalonia (IBEC); 08028 Barcelona Spain
| | - Frank Mücklich
- Chair of Functional Materials; Faculty of Natural Sciences and Technology; Saarland University; 66123 Saarbrücken Germany
| | - Marta Pegueroles
- Biomaterials, Biomechanics and Tissue Engineering Group; Department of Materials Science and Metallurgical Engineering; Technical University of Catalonia (UPC), EEBE; 08019, Av. Eduard Maristany 10-14 08019 Barcelona Spain
- Centre for Research in NanoEngineering (CRNE); UPC, EEBE; Av. Eduard Maristany 10-14 08019 Barcelona Spain
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19
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Chen JY, Hu M, Zhang H, Li BC, Chang H, Ren KF, Wang YB, Ji J. Improved Antithrombotic Function of Oriented Endothelial Cell Monolayer on Microgrooves. ACS Biomater Sci Eng 2017; 4:1976-1985. [PMID: 33445268 DOI: 10.1021/acsbiomaterials.7b00496] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Achievement of an endothelial cell (EC) monolayer (re-endothelialization) on the vascular implant surface with competent and functioning features is critical for long-term safety after implantation. Oriented EC monolayer is beneficial to improve endothelial function such as enhanced athero-resistant property. However, the information about antithrombotic property of oriented EC monolayer is limited. Here, we used the microgrooved polydimethylsiloxane substrates to guide EC orientation and obtain oriented EC monolayer. The effects of anisotropic topography on EC behaviors and antithrombotic function of the EC monolayer were then evaluated. Our data demonstrated that ECs responded to grooves in a size-dependent way as shown in oriented cell cytoskeleton and nuclei, enhanced directed migration, and overall velocity. Furthermore, compared to the EC monolayer on the flat surface, the oriented EC monolayer formed on the grooved substrates exhibited improved antithrombotic capability as indicated by higher expression of functional related genes, production of prostacyclin and tissue plasminogen activator, and prolonged activated coagulation time. The improvement of antithrombotic function was especially notable on the smaller-size groove. These findings reveal the responses of ECs to varisized topography and antithrombotic function of the oriented EC monolayer, providing insights into optimal design of vascular implants.
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Affiliation(s)
- Jia-Yan Chen
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Mi Hu
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - He Zhang
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Bo-Chao Li
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Hao Chang
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Ke-Feng Ren
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Yun-Bing Wang
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China
| | - Jian Ji
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
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20
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Affiliation(s)
- Julio C. Palmaz
- The University of Texas Health Science Center, San Antonio, TX, USA
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21
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Vesga B, Hernandez H, Higuera S, Gasior P, Echeveri D, Delgado JA, Dager A, Arana C, Simonton C, Maehara A, Palmaz J, Granada JF. Biological effect of microengineered grooved stents on strut healing: a randomised OCT-based comparative study in humans. Open Heart 2017; 4:e000521. [PMID: 28674616 PMCID: PMC5471868 DOI: 10.1136/openhrt-2016-000521] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Revised: 12/20/2016] [Accepted: 03/29/2017] [Indexed: 11/12/2022] Open
Abstract
Objective To evaluate the biological effect of microengineered stent grooves (MSG) on early strut healing in humans by performing optical coherence tomography (OCT) analysis 3 weeks following the implantation. Background In the experimental setting, MSG accelerate endothelial cell migration and reduce neointimal proliferation compared with bare metal stent (BMS). Methods A total of 37 patients undergoing percutaneous coronary intervention with de novo coronary lesions were randomly assigned to either MSG (n=19) or an identical BMS controls (n=18). All patients underwent OCT imaging at 3 weeks. A total of 7959 struts were included in the final analysis. Results At 3 weeks following stent implantation, almost all struts analysed (~97%) had evidence of tissue coverage. The percentage of partially covered struts was comparable between both groups. However, the percentage of fully embedded struts was higher in the BMS group (81.22%, 49.75–95.52) compared with the MSG group (74.21%, 58.85–86.38). The stent-level analysis demonstrated reduction in neointimal formation (neointimal hyperplasia area and volume reduction of ~14% and ~19%, respectively) in the MSG versus the BMS group. In the strut-level analysis, an even greater reduction (~22% in neointimal thickness) was seen in the MSG group. Layered neointimal was present in ~6% of the OCT frames in the BMS group while it was not present in the MSG group. Conclusions MSG induced a more homogeneous and predictable pattern of surface healing in the early stages following stent implantation. The biological effect of MSG on stent healing has the potential to improve the safety profile of current generation drug-eluting stents. Classifications BMS, OCT, clinical trials.
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Affiliation(s)
- Boris Vesga
- Universidad Industrial de Santander, Bucaramanga, Colombia.,Instituto del Corazon de Bucaramanga, Bucaramanga, Colombia
| | - Hector Hernandez
- Universidad Industrial de Santander, Bucaramanga, Colombia.,Instituto del Corazon de Bucaramanga, Bucaramanga, Colombia
| | - Sergio Higuera
- Universidad Industrial de Santander, Bucaramanga, Colombia.,Instituto del Corazon de Bucaramanga, Bucaramanga, Colombia
| | - Pawel Gasior
- CRF-Skirball Center for Innovation, Orangeburg, New York, USA.,3rd Department of Cardiology, Medical University of Silesia, Katowice, Poland
| | - Dario Echeveri
- Fundacion Cardioinfantil Instituto de Cardiologia, Bogota, Colombia
| | | | | | | | | | - Akiko Maehara
- Cardiology, Cardiovascular Research Foundation/Columbia University Medical Center, New York, USA
| | | | - Juan F Granada
- Skirball Center for Cardiovascular Research, Cardiovascular Research Foundation, Orangeburg, New York, USA
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22
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Ter Meer M, Daamen WF, Hoogeveen YL, van Son GJF, Schaffer JE, van der Vliet JA, Kool LJS, van den Heuvel LP. Continuously Grooved Stent Struts for Enhanced Endothelial Cell Seeding. Cardiovasc Intervent Radiol 2017; 40:1237-1245. [PMID: 28470391 PMCID: PMC5489614 DOI: 10.1007/s00270-017-1659-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2016] [Accepted: 04/21/2017] [Indexed: 02/04/2023]
Abstract
Purpose Implantation of pre-endothelialized stents could enhance cellular recovery of a damaged vessel wall provided attached cells remain viable, functional and are present in sufficient numbers after deployment. The purpose of this study was to evaluate the feasibility of grooved stainless steel (SS) stents as a primary endothelial cell (EC) carrier with potentially enhanced EC protection upon stent deployment. Materials and Methods Attachment and behavior of enzymatically harvested human adult venous ECs seeded onto gelatin-coated vascular stents were evaluated in an in vitro setting. Smooth and grooved SS stents and smooth nitinol stents were studied. Results All cells expressed EC markers vWF and CD31. Using rotational seeding for a period of 16–24 h, ECs attached firmly to the stents with sufficient coverage to form a confluent EC monolayer. The grooved SS wire design was found to enable attachment of three times the number of cells compared to smooth wires. This also resulted in an increased number of cells remaining on the stent after deployment and after pulsatile flow of 180 ml/min for 24 h, which did not result in additional EC detachment. Conclusions The grooved stent provides a potential percutaneous means to deliver sufficient numbers of viable and functional cells to a vessel segment during vascular intervention. The grooves were found to offer a favorable surface for EC attachment and protection during stent deployment in an in vitro setting. Electronic supplementary material The online version of this article (doi:10.1007/s00270-017-1659-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Marja Ter Meer
- Department of Radiology and Nuclear Medicine (766), Radboud University Medical Center, PO Box 9101, 6500 HB, Nijmegen, The Netherlands.
| | - Willeke F Daamen
- Department of Biochemistry 280, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, PO Box 9101, 6500 HB, Nijmegen, The Netherlands
| | - Yvonne L Hoogeveen
- Department of Radiology and Nuclear Medicine (766), Radboud University Medical Center, PO Box 9101, 6500 HB, Nijmegen, The Netherlands
| | - Gijs J F van Son
- Department of Radiology and Nuclear Medicine (766), Radboud University Medical Center, PO Box 9101, 6500 HB, Nijmegen, The Netherlands
| | - Jeremy E Schaffer
- Fort Wayne Metals, Research and Development, 9609 Ardmore Avenue, Fort Wayne, IN, 46809, USA
| | - J Adam van der Vliet
- Department of Surgery 618, Radboud University Medical Center, PO Box 9101, 6500 HB, Nijmegen, The Netherlands
| | - Leo J Schultze Kool
- Department of Radiology and Nuclear Medicine (766), Radboud University Medical Center, PO Box 9101, 6500 HB, Nijmegen, The Netherlands
| | - Lambertus P van den Heuvel
- Department of Pediatrics/Pediatric Nephrology 774, Radboud University Medical Center, PO Box 9101, 6500 HB, Nijmegen, The Netherlands.,Department of Development and Regeneration/Pediatrics, Catholic University Leuven, PO Box 7003, 3000, Leuven, Belgium
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23
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Cui Y, Zhao F, Liu J, Wang X, Du J, Shi D, Chen K. Zedoary Guaiane-Type Sesquiterpenes-Eluting Stents Accelerate Endothelial Healing Without Neointimal Hyperplasia in a Porcine Coronary Artery Model. J Cardiovasc Pharmacol Ther 2017; 22:476-484. [PMID: 28269995 DOI: 10.1177/1074248417696819] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Objective: The effects of zedoary guaiane-type sesquiterpenes (ZGS)-based eluting stent (ZES) in accelerating reendothelialization and inhibiting neointimal hyperplasia were examined in a porcine coronary artery model. Methods: The ZES was prepared by polymer-free 316L stainless metal stents. Sirolimus-eluting stents (SES) and bare metal stents (BMS) with identical platforms were used as controls. Stents with 15 mm in length and 2.0 to 3.5 mm in diameter were implanted in porcine coronary arteries. Scanning electron microscopy (SEM) and histopathology were performed to assess the reendothelialization and neointimal hyperplasia. The 3-(4, 5-dimethylthiazol-2yl)-2, 5-diphenyl-2H-tetrazoliumbromide assay and flow cytometry were used to assess the influence of ZGS on human umbilical vascular endothelial cells (HUVECs). Results: At 7 days, SEM showed that percentage of endothelial coverage area was 94.04% ± 5.01% for ZES, 47.59% ± 19.91% for SES ( P < .01 for ZES vs SES), and 59.58% ± 19.61% for BMS ( P < .05 for ZES vs BMS). At 28 days, the percentage of coverage area was 98.51% ± 1.86% for ZES, 86.18% ± 8.16% for SES ( P < .05 for ZES vs SES), and 94.26% ± 5.58% for BMS. Neointimal area and stenosis were significantly lower in ZES (1.07 ± 0.48 mm2, 27.66% ± 12.20%) compared to BMS (1.73 ± 0.69 mm2, 44.08% ± 15.03%, both P < .01, respectively), with no difference in SES (0.94 ± 0.12 mm2, 28.87% ± 6.00%, both P > .05, respectively). The ZGS also promoted HUVECs viability and improved HUVECs proliferation compared to sirolimus. Conclusion: The ZES accelerated reendothelialization and suppressed neointimal hyperplasia in a porcine coronary artery model, with beneficial effects on HUVECs.
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Affiliation(s)
- Yuanyuan Cui
- Cardiovascular Diseases Center, Xiyuan Hospital, China Academy of Chinese Medical Sciences, Beijing, China
- China Heart Institute of Chinese Medicine, China Academy of Chinese Medical Sciences, Beijing, China
| | - Fuhai Zhao
- Cardiovascular Diseases Center, Xiyuan Hospital, China Academy of Chinese Medical Sciences, Beijing, China
- China Heart Institute of Chinese Medicine, China Academy of Chinese Medical Sciences, Beijing, China
| | - Jiangang Liu
- Cardiovascular Diseases Center, Xiyuan Hospital, China Academy of Chinese Medical Sciences, Beijing, China
- China Heart Institute of Chinese Medicine, China Academy of Chinese Medical Sciences, Beijing, China
| | - Xin Wang
- Cardiovascular Diseases Center, Xiyuan Hospital, China Academy of Chinese Medical Sciences, Beijing, China
- China Heart Institute of Chinese Medicine, China Academy of Chinese Medical Sciences, Beijing, China
| | - Jianpeng Du
- Cardiovascular Diseases Center, Xiyuan Hospital, China Academy of Chinese Medical Sciences, Beijing, China
- China Heart Institute of Chinese Medicine, China Academy of Chinese Medical Sciences, Beijing, China
| | - Dazhuo Shi
- Cardiovascular Diseases Center, Xiyuan Hospital, China Academy of Chinese Medical Sciences, Beijing, China
- China Heart Institute of Chinese Medicine, China Academy of Chinese Medical Sciences, Beijing, China
| | - Keji Chen
- Cardiovascular Diseases Center, Xiyuan Hospital, China Academy of Chinese Medical Sciences, Beijing, China
- China Heart Institute of Chinese Medicine, China Academy of Chinese Medical Sciences, Beijing, China
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24
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Li Y, Xiao Y, Liu C. The Horizon of Materiobiology: A Perspective on Material-Guided Cell Behaviors and Tissue Engineering. Chem Rev 2017; 117:4376-4421. [PMID: 28221776 DOI: 10.1021/acs.chemrev.6b00654] [Citation(s) in RCA: 345] [Impact Index Per Article: 49.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Although the biological functions of cell and tissue can be regulated by biochemical factors (e.g., growth factors, hormones), the biophysical effects of materials on the regulation of biological activity are receiving more attention. In this Review, we systematically summarize the recent progress on how biomaterials with controllable properties (e.g., compositional/degradable dynamics, mechanical properties, 2D topography, and 3D geometry) can regulate cell behaviors (e.g., cell adhesion, spreading, proliferation, cell alignment, and the differentiation or self-maintenance of stem cells) and tissue/organ functions. How the biophysical features of materials influence tissue/organ regeneration have been elucidated. Current challenges and a perspective on the development of novel materials that can modulate specific biological functions are discussed. The interdependent relationship between biomaterials and biology leads us to propose the concept of "materiobiology", which is a scientific discipline that studies the biological effects of the properties of biomaterials on biological functions at cell, tissue, organ, and the whole organism levels. This Review highlights that it is more important to develop ECM-mimicking biomaterials having a self-regenerative capacity to stimulate tissue regeneration, instead of attempting to recreate the complexity of living tissues or tissue constructs ex vivo. The principles of materiobiology may benefit the development of novel biomaterials providing combinative bioactive cues to activate the migration of stem cells from endogenous reservoirs (i.e., cell niches), stimulate robust and scalable self-healing mechanisms, and unlock the body's innate powers of regeneration.
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Affiliation(s)
- Yulin Li
- Key Laboratory for Ultrafine Materials of Ministry of Education, East China University of Science and Technology , Meilong Road 130, Shanghai 200237, People's Republic of China
| | - Yin Xiao
- Institute of Health and Biomedical Innovation, Queensland University of Technology , Kelvin Grove, Brisbane, Queensland 4059, Australia
| | - Changsheng Liu
- Key Laboratory for Ultrafine Materials of Ministry of Education, East China University of Science and Technology , Meilong Road 130, Shanghai 200237, People's Republic of China
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25
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Herting S, DiBartolomeo A, Pipes T, Kunz S, Temnyk K, Truty J, Ur S, Cardinal KO. Human Umbilical Versus Coronary Cell Sources for Tissue-Engineered Blood Vessel Mimics. ACTA ACUST UNITED AC 2016. [DOI: 10.1089/aivt.2016.0012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Scott Herting
- Department of Biomedical Engineering, Cal Poly, San Luis Obispo, San Luis Obispo, California
| | - Alex DiBartolomeo
- Department of Biomedical Engineering, Cal Poly, San Luis Obispo, San Luis Obispo, California
| | - Toni Pipes
- Department of Biomedical Engineering, Cal Poly, San Luis Obispo, San Luis Obispo, California
| | - Shelby Kunz
- Department of Biomedical Engineering, Cal Poly, San Luis Obispo, San Luis Obispo, California
| | - Kristen Temnyk
- Department of Biomedical Engineering, Cal Poly, San Luis Obispo, San Luis Obispo, California
| | - Jakub Truty
- Department of Biomedical Engineering, Cal Poly, San Luis Obispo, San Luis Obispo, California
| | - Sarah Ur
- Department of Biomedical Engineering, Cal Poly, San Luis Obispo, San Luis Obispo, California
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Zhang Q, Dong H, Li Y, Zhu Y, Zeng L, Gao H, Yuan B, Chen X, Mao C. Microgrooved Polymer Substrates Promote Collective Cell Migration To Accelerate Fracture Healing in an in Vitro Model. ACS APPLIED MATERIALS & INTERFACES 2015; 7:23336-45. [PMID: 26457873 PMCID: PMC4934131 DOI: 10.1021/acsami.5b07976] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Surface topography can affect cell adhesion, morphology, polarity, cytoskeleton organization, and osteogenesis. However, little is known about the effect of topography on the fracture healing in repairing nonunion and large bone defects. Microgrooved topography on the surface of bone implants may promote cell migration into the fracture gap to accelerate fracture healing. To prove this hypothesis, we used an in vitro fracture (wound) healing assay on the microgrooved polycaprolactone substrates to study the effect of microgroove widths and depths on the osteoblast-like cell (MG-63) migration and the subsequent healing. We found that the microgrooved substrates promoted MG-63 cells to migrate collectively into the wound gap, which serves as a fracture model, along the grooves and ridges as compared with the flat substrates. Moreover, the groove widths did not show obvious influence on the wound healing whereas the smaller groove depths tended to favor the collective cell migration and thus subsequent healing. The microgrooved substrates accelerated the wound healing by facilitating the collective cell migration into the wound gaps but not by promoting the cell proliferation. Furthermore, microgrooves were also found to promote the migration of human mesenchymal stem cells (hMSCs) to heal the fracture model. Though osteogenic differentiation of hMSCs was not improved on the microgrooved substrate, collagen I and minerals deposited by hMSCs were organized in a way similar to those in the extracellular matrix of natural bone. These findings suggest the necessity in using microgrooved implants in enhancing fracture healing in bone repair.
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Affiliation(s)
- Qing Zhang
- Department of Biomedical Engineering, South China University of Technology, Guangzhou, Guangdong 510641, China
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, Guangdong 510641, China
| | - Hua Dong
- Department of Biomedical Engineering, South China University of Technology, Guangzhou, Guangdong 510641, China
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, Guangdong 510641, China
| | - Yuli Li
- Department of Biomedical Engineering, South China University of Technology, Guangzhou, Guangdong 510641, China
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, Guangdong 510641, China
| | - Ye Zhu
- Department of Chemistry & Biochemistry, Stephenson Life Sciences Research Center, University of Oklahoma, Norman, Oklahoma 73019, United States
| | - Lei Zeng
- Department of Biomedical Engineering, South China University of Technology, Guangzhou, Guangdong 510641, China
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, Guangdong 510641, China
| | - Huichang Gao
- Department of Biomedical Engineering, South China University of Technology, Guangzhou, Guangdong 510641, China
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, Guangdong 510641, China
| | - Bo Yuan
- Department of Biomedical Engineering, South China University of Technology, Guangzhou, Guangdong 510641, China
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, Guangdong 510641, China
| | - Xiaofeng Chen
- Department of Biomedical Engineering, South China University of Technology, Guangzhou, Guangdong 510641, China
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, Guangdong 510641, China
| | - Chuanbin Mao
- Department of Chemistry & Biochemistry, Stephenson Life Sciences Research Center, University of Oklahoma, Norman, Oklahoma 73019, United States
- School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
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Vandrangi P, Gott SC, Kozaka R, Rodgers VGJ, Rao MP. Comparative endothelial cell response on topographically patterned titanium and silicon substrates with micrometer to sub-micrometer feature sizes. PLoS One 2014; 9:e111465. [PMID: 25357245 PMCID: PMC4214724 DOI: 10.1371/journal.pone.0111465] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2014] [Accepted: 10/02/2014] [Indexed: 12/02/2022] Open
Abstract
In this work, we evaluate the in vitro response of endothelial cells (EC) to variation in precisely-defined, micrometer to sub-micrometer scale topography on two different substrate materials, titanium (Ti) and silicon (Si). Both substrates possess identically-patterned surfaces composed of microfabricated, groove-based gratings with groove widths ranging from 0.5 to 50 µm, grating pitch twice the groove width, and groove depth of 1.3 µm. These specific materials are chosen due to their relevance for implantable microdevice applications, while grating-based patterns are chosen for the potential they afford for inducing elongated and aligned cellular morphologies reminiscent of the native endothelium. Using EA926 cells, a human EC variant, we show significant improvement in cellular adhesion, proliferation, morphology, and function with decreasing feature size on patterned Ti substrates. Moreover, we show similar trending on patterned Si substrates, albeit to a lesser extent than on comparably patterned Ti substrates. Collectively, these results suggest promise for sub-micrometer topographic patterning in general, and sub-micrometer patterning of Ti specifically, as a means for enhancing endothelialization and neovascularisation for novel implantable microdevice applications.
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Affiliation(s)
- Prashanthi Vandrangi
- Department of Mechanical Engineering, University of California Riverside, Riverside, California, United States of America
- Department of Bioengineering, University of California Riverside, Riverside, California, United States of America
| | - Shannon C. Gott
- Department of Mechanical Engineering, University of California Riverside, Riverside, California, United States of America
| | - Ryan Kozaka
- Department of Bioengineering, University of California Riverside, Riverside, California, United States of America
| | - Victor G. J. Rodgers
- Department of Bioengineering, University of California Riverside, Riverside, California, United States of America
- Materials Science and Engineering Program, University of California Riverside, Riverside, California, United States of America
| | - Masaru P. Rao
- Department of Mechanical Engineering, University of California Riverside, Riverside, California, United States of America
- Department of Bioengineering, University of California Riverside, Riverside, California, United States of America
- Materials Science and Engineering Program, University of California Riverside, Riverside, California, United States of America
- * E-mail:
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Yin K, Agrawal DK. High-density lipoprotein: a novel target for antirestenosis therapy. Clin Transl Sci 2014; 7:500-11. [PMID: 25043950 DOI: 10.1111/cts.12186] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Restenosis is an integral pathological process central to the recurrent vessel narrowing after interventional procedures. Although the mechanisms for restenosis are diverse in different pathological conditions, endothelial dysfunction, inflammation, vascular smooth muscle cell (SMC) proliferation, and myofibroblasts transition have been thought to play crucial role in the development of restenosis. Indeed, there is an inverse relationship between high-density lipoprotein (HDL) levels and risk for coronary heart disease (CHD). However, relatively studies on the direct assessment of HDL effect on restenosis are limited. In addition to involvement in the cholesterol reverse transport, many vascular protective effects of HDL, including protection of endothelium, antiinflammation, antithrombus actions, inhibition of SMC proliferation, and regulation by adventitial effects may contribute to the inhibition of restenosis, though the exact relationships between HDL and restenosis remain to be elucidated. This review summarizes the vascular protective effects of HDL, emphasizing the potential role of HDL in intimal hyperplasia and vascular remodeling, which may provide novel prophylactic and therapeutic strategies for antirestenosis.
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Affiliation(s)
- Kai Yin
- Center for Clinical & Translational Science, Creighton University School of Medicine, Omaha, Nebraska, USA
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Tang QY, Tong WY, Shi J, Shi P, Lam YW, Pang SW. Influence of engineered surface on cell directionality and motility. Biofabrication 2014; 6:015011. [DOI: 10.1088/1758-5082/6/1/015011] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Li L, Mirhosseini N, Michael A, Liu Z, Wang T. Enhancement of endothelialisation of coronary stents by laser surface engineering. Lasers Surg Med 2013; 45:608-16. [PMID: 24037969 DOI: 10.1002/lsm.22180] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/22/2013] [Indexed: 11/11/2022]
Abstract
BACKGROUND AND OBJECTIVE Coronary stents have been widely used in the treatment of coronary heart disease. However, complications have hampered the long-term success of the device. Bare-metal stents (BMS) have a high rate of restenosis and poor endothelialisation. The drug-eluting stents (DES), although dramatically reduce restenosis, significantly prevent endothelialisation leading to late thrombosis and behave the same way as BMS after drug releasing. Rapid adhesion and growth of endothelial cells on the stent surface is a key process for early vascular healing after coronary stenting which contributes to the reduction of major complications. Surface properties manipulate cell growth and directly determine the success and life-span of the implants. However, the ideal surface properties of coronary stents are not yet fully understood. The objective of this research is to understand how surface micro/nano textures and associated material chemistry changes generated by a laser beam affect the behavior of endothelial cells on bare metal 316L stents. MATERIALS AND METHODS A high power laser beam was applied to modifying the surface properties of 316L coronary stent material and the commercial coronary stents, followed by examination of the adhesion and proliferation of human coronary endothelial cells that were growing on the surfaces. Surface properties were examined by scanning electron microscopy, contact angle measurement, and X-ray photoelectron spectroscopy. RESULTS A novel surface with combined micro/nano features was created on stent material 316L and coronary stent with a specific surface chemistry. This surface gives rise to a threefold increase in the adhesion and eightfold increase in the proliferation of endothelial cells. Interestingly, such effects were only observed when the surface texture was produced in the nitrogen atmosphere suggesting the importance of the surface chemistry, including the dramatic increase of chromium nitride, for the interaction of endothelial cells with the material surface. This novel surface is also super-hydrophilic with close to zero water/cell culture fluid contact angles and low cytotoxicity. CONCLUSIONS A novel surface created by laser surface-engineering with a combination of defined surface texture and surface chemistry was found beneficial for the improvement of coronary stent endothelialisation. The technology presented here could work with both DES and BMS with added benefit for the improvement of the biocompatibility of current coronary stents.
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Affiliation(s)
- Lin Li
- Laser Processing Research Centre, School of Mechanical, Aerospace and Civil Engineering, and Photon Science Institute, The University of Manchester, Manchester, M13 9PL, UK
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Circulation: Cardiovascular Interventions
Editors’ Picks. Circ Cardiovasc Interv 2013. [DOI: 10.1161/circinterventions.113.000700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Palmaz JC. The intravascular stent and the future of device technology. Catheter Cardiovasc Interv 2012; 80:713-6. [PMID: 23097283 DOI: 10.1002/ccd.24648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Julio C Palmaz
- Department of Radiology, The University of Texas Health Science Center at San Antonio, 7703 Floyd Curl Drive, MS 7800, San Antonio, Texas 78229, USA.
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