51
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Zeng FR, Liang Y, Li ZL. Precision Aliphatic Polyesters via Segmer Assembly Polymerization. Molecules 2018; 23:E452. [PMID: 29463013 PMCID: PMC6017348 DOI: 10.3390/molecules23020452] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Revised: 02/13/2018] [Accepted: 02/14/2018] [Indexed: 01/10/2023] Open
Abstract
Precise structure-property relation of a biodegradable polymer (e.g., aliphatic polyester) is anticipated only if monomer units and chiral centers are arranged in a defined primary sequence as a biomacromolecule. An emerging synthetic methodology, namely segmer assembly polymerization (SAP), is introduced in this paper to reveal the latest progress in polyester synthesis. Almost any periodic polyester envisioned can be synthesized via SAP using a programed linear or cyclic monomer. In this context, the macroscopic properties of a biodegradable polymer are fundamentally determined by microstructural information through a bottom-up approach. It can be highlighted that SAP ideally combines the precision of organic synthesis and the high efficiency of a polymerization reaction. Previously reported strategies including nucleophilic displacement, polyesterification, cross-metathesis polymerization (CMP), ring-opening polymerization (ROP), ring-opening metathesis polymerization (ROMP) and entropy-driven ring-opening metathesis polymerization (ED-ROMP) are critically reviewed in this paper to shed light on precision synthesis of aliphatic polyesters via SAP. Emerging yet challenging, SAP is a paradigm which reflects the convergence of organic and polymer chemistries and is also an efficient pathway to microstructural control. The current status, future challenges and promising trends in this realm are analyzed and discussed in this overview of the state-of-the-art.
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Affiliation(s)
- Fu-Rong Zeng
- Department of Chemistry, College of Science, Huazhong Agricultural University, Wuhan 430070, Hubei, China.
| | - Yang Liang
- Department of Chemistry, College of Science, Huazhong Agricultural University, Wuhan 430070, Hubei, China.
| | - Zi-Long Li
- Department of Chemistry, College of Science, Huazhong Agricultural University, Wuhan 430070, Hubei, China.
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52
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Farah S, Domb AJ. Crystalline paclitaxel coated DES with bioactive protective layer development. J Control Release 2018; 271:107-117. [PMID: 29289571 DOI: 10.1016/j.jconrel.2017.12.030] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Revised: 11/29/2017] [Accepted: 12/27/2017] [Indexed: 01/01/2023]
Abstract
Drug eluting stents (DES) based on polymeric-carriers currently lead the market, however, reports on clinical complications encourage the development of safer and more effective DES. We recently reported on carrier-free DES based on rapamycin crystalline coating as a potential therapeutic solution. Here, we report for the first time surface crystallization of paclitaxel (PT) onto metallic stents. The physicochemical principles of crystallization and key process parameters were extensively studied for fabrication of controllable and homogeneous crystalline coatings on stent scaffolds. Stents loaded with nearly 100μg PT were chosen as a potential therapeutic device with a multilayer coating of 4-7μm thickness. In vitro PT release from these coated stents shows constant release for at least 28days with 10% cumulatively released. The effect of fast dissolving top coating on the physical stability of the coated stent was determined. The top coating enhances the mechanical stability of the crystalline coating during deployment and expansion simulations. Also, incorporating PT in the protective top coating for developing bioactive top coating for multilayer controlled release purpose was intensively studied. This process has wide applications that can be further implemented for other drugs for effective local drug delivery from implantable medical devices.
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Affiliation(s)
- Shady Farah
- Institute of Drug Research, School of Pharmacy-Faculty of Medicine, Center for Nanoscience and Nanotechnology and The Alex Grass Center for Drug Design and Synthesis, The Hebrew University of Jerusalem, 91120, Israel.
| | - Abraham J Domb
- Institute of Drug Research, School of Pharmacy-Faculty of Medicine, Center for Nanoscience and Nanotechnology and The Alex Grass Center for Drug Design and Synthesis, The Hebrew University of Jerusalem, 91120, Israel.
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Lee DH, de la Torre Hernandez JM. The Newest Generation of Drug-eluting Stents and Beyond. Eur Cardiol 2018; 13:54-59. [PMID: 30310472 DOI: 10.15420/ecr.2018:8:2] [Citation(s) in RCA: 78] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
There has been a great evolution in the development of coronary stents in order to avoid both restenosis and thrombosis. Improvements have led to improvements in the design and conformation of metallic or resorbable structures, with an adequate balance between trackability and radial force, the development of antiproliferative drugs and the polymers to control release and allow adequate endothelialisation and an optimal duration of the antiplatelet regimen. Some suggestions are provided about the ideal characteristics of future coronary stents.
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Affiliation(s)
- Dae-Hyun Lee
- Cardiology Service, Interventional Cardiology Unit, University Hospital Marques de Valdecilla, Santander Spain
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54
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Han CM, Park KS, Joung YK. Recent alternative approaches of vascular drug-eluting stents. JOURNAL OF PHARMACEUTICAL INVESTIGATION 2017. [DOI: 10.1007/s40005-017-0378-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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55
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Bagheri M, Mohammadi M, Steele TW, Ramezani M. Nanomaterial coatings applied on stent surfaces. Nanomedicine (Lond) 2017; 11:1309-26. [PMID: 27111467 DOI: 10.2217/nnm-2015-0007] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
The advent of percutaneous coronary intervention and intravascular stents has revolutionized the field of interventional cardiology. Nonetheless, in-stent restenosis, inflammation and late-stent thrombosis are the major obstacles with currently available stents. In order to enhance the hemocompatibility of stents, advances in the field of nanotechnology allow novel designs of nanoparticles and biomaterials toward localized drug/gene carriers or stent scaffolds. The current review focuses on promising polymers used in the fabrication of newer generations of stents with a short synopsis on atherosclerosis and current commercialized stents, nanotechnology's impact on stent development and recent advancements in stent biomaterials is discussed in context.
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Affiliation(s)
- Mahsa Bagheri
- Shariati Hospital, Mashhad University of Medical Sciences, Mashhad, PO Box 935189-9983, Iran.,Nanotechnology Research Center, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, PO Box 91775-1365, Iran
| | - Marzieh Mohammadi
- Nanotechnology Research Center, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, PO Box 91775-1365, Iran
| | - Terry Wj Steele
- Division of Materials Technology, Materials & Science Engineering, Nanyang Technological University, Singapore
| | - Mohammad Ramezani
- Pharmaceutical Research Center, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, PO Box 91775-1365, Iran
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Zhou J, Frank MA, Yang Y, Boccaccini AR, Virtanen S. A novel local drug delivery system: Superhydrophobic titanium oxide nanotube arrays serve as the drug reservoir and ultrasonication functions as the drug release trigger. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 82:277-283. [PMID: 29025658 DOI: 10.1016/j.msec.2017.08.066] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 08/10/2017] [Accepted: 08/16/2017] [Indexed: 02/01/2023]
Abstract
A local drug delivery system consisting of superhydrophobic titanium oxide nanotube (S-TNTs) arrays and ultrasonic-controlled release trigger was developed in this work. Hydrophilic TNTs arrays are converted into superhydrophobic after being treated by 1H,1H,2H,2H- perfluorooctyl-triethoxysilane (POTS). S-TNTs arrays serving as a drug-carrying vehicle require no extra sealing treatment due to the excellent isolation effect from the trapped air layer on the surface. Different amounts of drugs could be loaded into S-TNTs arrays by control of the structure of arrays (including length and diameter of tubes) and the original amount of drug in the drug-loading solution. The relation between surface morphology of TNTs arrays and superhydrophobicity (isolation effect) was thoroughly investigated. To achieve a stimulus-responsive drug delivery system, ultrasonication was employed as an efficient drug release trigger. Trapped air layer could be selectively removed by ultrasonication, and therefore the loaded drug could be released in a multiple and controlled manner. Any drugs that can dissolve in nonpolar solutions are expected to be suitable for this local drug delivery system.
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Affiliation(s)
- Juncen Zhou
- Institute for Surface Science and Corrosion, Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Germany
| | - Micael Alonso Frank
- Institute for Surface Science and Corrosion, Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Germany; Institute of Biomaterials, Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Germany
| | - Yuyun Yang
- Institute of Biomaterials, Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Germany; Institute for Surface Science and Corrosion, Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Germany
| | - Aldo R Boccaccini
- Institute of Biomaterials, Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Germany
| | - Sannakaisa Virtanen
- Institute for Surface Science and Corrosion, Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Germany.
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Chandrawati R, Olesen MTJ, Marini TCC, Bisra G, Guex AG, de Oliveira MG, Zelikin AN, Stevens MM. Enzyme Prodrug Therapy Engineered into Electrospun Fibers with Embedded Liposomes for Controlled, Localized Synthesis of Therapeutics. Adv Healthc Mater 2017; 6:10.1002/adhm.201700385. [PMID: 28699219 PMCID: PMC5590711 DOI: 10.1002/adhm.201700385] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2017] [Revised: 05/31/2017] [Indexed: 12/11/2022]
Abstract
Enzyme prodrug therapy (EPT) enables localized conversion of inert prodrugs to active drugs by enzymes. Performance of EPT necessitates that the enzyme remains active throughout the time frame of the envisioned therapeutic application. β-glucuronidase is an enzyme with historically validated performance in EPT, however it retains its activity in biomaterials for an insufficiently long period of time, typically not exceeding 7 d. Herein, the encapsulation of β-glucuronidase in liposomal subcompartments within poly(vinyl alcohol) electrospun fibers is reported, leading to the assembly of biocatalytically active materials with activity of the enzyme sustained over at least seven weeks. It is further shown that liposomes provide the highly beneficial stabilization of the enzyme when incubated in cell culture media. The assembled biocatalytic materials successfully produce antiproliferative drugs (SN-38) using externally administered prodrugs (SN-38-glucuronide) and effectively suppress cell proliferation, with envisioned utility in the design of cardiovascular grafts.
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Affiliation(s)
- Rona Chandrawati
- Department of Materials, Department of Bioengineering, and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, UK
| | - Morten T. J. Olesen
- Department of Chemistry and iNANO Interdisciplinary Nanoscience Center, Aarhus University, Aarhus C 8000, Denmark
| | - Thatiane C. C. Marini
- Institute of Chemistry, University of Campinas, UNICAMP, Campinas, 13083-970, São Paulo, Brazil
| | - Gurpal Bisra
- Department of Materials, Department of Bioengineering, and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, UK
| | - Anne Géraldine Guex
- Department of Materials, Department of Bioengineering, and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, UK
| | - Marcelo G. de Oliveira
- Institute of Chemistry, University of Campinas, UNICAMP, Campinas, 13083-970, São Paulo, Brazil
| | - Alexander N. Zelikin
- Department of Chemistry and iNANO Interdisciplinary Nanoscience Center, Aarhus University, Aarhus C 8000, Denmark
| | - Molly M. Stevens
- Department of Materials, Department of Bioengineering, and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, UK
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58
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Gu SY, Chang K, Jin SP. A dual-induced self-expandable stent based on biodegradable shape memory polyurethane nanocomposites (PCLAU/Fe3
O4
) triggered around body temperature. J Appl Polym Sci 2017. [DOI: 10.1002/app.45686] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Shu-Ying Gu
- Department of Polymer Materials; School of Materials Science and Engineering, Tongji University; Shanghai 201804 People's Republic of China
- Key Laboratory of Advanced Civil Engineering Materials; Ministry of Education, Tongji University; Shanghai 201804 People's Republic of China
| | - Kun Chang
- Department of Polymer Materials; School of Materials Science and Engineering, Tongji University; Shanghai 201804 People's Republic of China
| | - Sheng-Peng Jin
- Department of Polymer Materials; School of Materials Science and Engineering, Tongji University; Shanghai 201804 People's Republic of China
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Kim KY, Park JH, Kim DH, Tsauo J, Kim MT, Son WC, Kang SG, Kim DH, Song HY. Sirolimus-eluting Biodegradable Poly-l-Lactic Acid Stent to Suppress Granulation Tissue Formation in the Rat Urethra. Radiology 2017; 286:140-148. [PMID: 28787263 DOI: 10.1148/radiol.2017170414] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Purpose To investigate the use of sirolimus-eluting biodegradable stents (SEBSs) to suppress granulation tissue formation after stent placement in a rat urethral model. Materials and Methods All experiments were approved by the animal research committee. A total of 36 male Sprague-Dawley rats were randomized into three equal groups after biodegradable stent placement. Group A received control biodegradable stents. Groups B and C received stents coated with 90 µg/cm2 and 450 µg/cm2 sirolimus, respectively. Six rats in each group were sacrificed after 4 weeks; the remaining rats were sacrificed after 12 weeks. The therapeutic effectiveness of SEBSs was assessed by comparing the results of retrograde urethrography and histologic examination. Analysis of variance with post hoc comparisons was used to evaluate statistical differences. Results SEBS placement was technically successful in all rats. Urethrographic and histologic examinations revealed significantly less granulation tissue formation at both time points in the rats receiving SEBSs (groups B and C) compared with those that received control stents (group A) (P < .05 for all). There were no significant differences in urethrographic and histologic findings between groups B and C (P > .05 for all). However, the mean number of epithelial layers in group B was higher than that in group C at 4 weeks after stent placement (P < .001). Apoptosis increased in group C compared with groups A and B (P < .05 for all). Conclusion The use of SEBSs suppressed granulation tissue formation secondary to stent placement in a rat urethral model; local therapy with SEBSs may be used to decrease stent-related granulation tissue formation. © RSNA, 2017.
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Affiliation(s)
- Kun Yung Kim
- From the Department of Radiology and Research Institute of Radiology (K.Y.K., J.H.P., J.T., M.T.K., S.G.K., H.Y.S.), Biomedical Engineering Research Center (J.H.P.), Department of Gastroenterology (Do Hoon Kim), and Department of Pathology (W.C.S.), Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 138-736, Republic of Korea; and Department of Radiology, Northwestern University Feinberg School of Medicine, Chicago, Ill (J.H.P., Dong-Hyun Kim)
| | - Jung-Hoon Park
- From the Department of Radiology and Research Institute of Radiology (K.Y.K., J.H.P., J.T., M.T.K., S.G.K., H.Y.S.), Biomedical Engineering Research Center (J.H.P.), Department of Gastroenterology (Do Hoon Kim), and Department of Pathology (W.C.S.), Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 138-736, Republic of Korea; and Department of Radiology, Northwestern University Feinberg School of Medicine, Chicago, Ill (J.H.P., Dong-Hyun Kim)
| | - Do Hoon Kim
- From the Department of Radiology and Research Institute of Radiology (K.Y.K., J.H.P., J.T., M.T.K., S.G.K., H.Y.S.), Biomedical Engineering Research Center (J.H.P.), Department of Gastroenterology (Do Hoon Kim), and Department of Pathology (W.C.S.), Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 138-736, Republic of Korea; and Department of Radiology, Northwestern University Feinberg School of Medicine, Chicago, Ill (J.H.P., Dong-Hyun Kim)
| | - Jiaywei Tsauo
- From the Department of Radiology and Research Institute of Radiology (K.Y.K., J.H.P., J.T., M.T.K., S.G.K., H.Y.S.), Biomedical Engineering Research Center (J.H.P.), Department of Gastroenterology (Do Hoon Kim), and Department of Pathology (W.C.S.), Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 138-736, Republic of Korea; and Department of Radiology, Northwestern University Feinberg School of Medicine, Chicago, Ill (J.H.P., Dong-Hyun Kim)
| | - Min Tae Kim
- From the Department of Radiology and Research Institute of Radiology (K.Y.K., J.H.P., J.T., M.T.K., S.G.K., H.Y.S.), Biomedical Engineering Research Center (J.H.P.), Department of Gastroenterology (Do Hoon Kim), and Department of Pathology (W.C.S.), Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 138-736, Republic of Korea; and Department of Radiology, Northwestern University Feinberg School of Medicine, Chicago, Ill (J.H.P., Dong-Hyun Kim)
| | - Woo-Chan Son
- From the Department of Radiology and Research Institute of Radiology (K.Y.K., J.H.P., J.T., M.T.K., S.G.K., H.Y.S.), Biomedical Engineering Research Center (J.H.P.), Department of Gastroenterology (Do Hoon Kim), and Department of Pathology (W.C.S.), Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 138-736, Republic of Korea; and Department of Radiology, Northwestern University Feinberg School of Medicine, Chicago, Ill (J.H.P., Dong-Hyun Kim)
| | - Sung-Gwon Kang
- From the Department of Radiology and Research Institute of Radiology (K.Y.K., J.H.P., J.T., M.T.K., S.G.K., H.Y.S.), Biomedical Engineering Research Center (J.H.P.), Department of Gastroenterology (Do Hoon Kim), and Department of Pathology (W.C.S.), Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 138-736, Republic of Korea; and Department of Radiology, Northwestern University Feinberg School of Medicine, Chicago, Ill (J.H.P., Dong-Hyun Kim)
| | - Dong-Hyun Kim
- From the Department of Radiology and Research Institute of Radiology (K.Y.K., J.H.P., J.T., M.T.K., S.G.K., H.Y.S.), Biomedical Engineering Research Center (J.H.P.), Department of Gastroenterology (Do Hoon Kim), and Department of Pathology (W.C.S.), Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 138-736, Republic of Korea; and Department of Radiology, Northwestern University Feinberg School of Medicine, Chicago, Ill (J.H.P., Dong-Hyun Kim)
| | - Ho-Young Song
- From the Department of Radiology and Research Institute of Radiology (K.Y.K., J.H.P., J.T., M.T.K., S.G.K., H.Y.S.), Biomedical Engineering Research Center (J.H.P.), Department of Gastroenterology (Do Hoon Kim), and Department of Pathology (W.C.S.), Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 138-736, Republic of Korea; and Department of Radiology, Northwestern University Feinberg School of Medicine, Chicago, Ill (J.H.P., Dong-Hyun Kim)
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Yao Y, Hu Z, Ye J, Hu C, Song Q, Da X, Yu Y, Li H, Xu C, Chen Q, Wang QK. Targeting AGGF1 (angiogenic factor with G patch and FHA domains 1) for Blocking Neointimal Formation After Vascular Injury. J Am Heart Assoc 2017. [PMID: 28649088 PMCID: PMC5669188 DOI: 10.1161/jaha.117.005889] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Background Despite recent improvements in angioplasty and placement of drug‐eluting stents in treatment of atherosclerosis, restenosis and in‐stent thrombosis impede treatment efficacy and cause numerous deaths. Research efforts are needed to identify new molecular targets for blocking restenosis. We aim to establish angiogenic factor AGGF1 (angiogenic factor with G patch and FHA domains 1) as a novel target for blocking neointimal formation and restenosis after vascular injury. Methods and Results AGGF1 shows strong expression in carotid arteries; however, its expression is markedly decreased in arteries after vascular injury. AGGF1+/− mice show increased neointimal formation accompanied with increased proliferation of vascular smooth muscle cells (VSMCs) in carotid arteries after vascular injury. Importantly, AGGF1 protein therapy blocks neointimal formation after vascular injury by inhibiting the proliferation and promoting phenotypic switching of VSMCs to the contractile phenotype in mice in vivo. In vitro, AGGF1 significantly inhibits VSMCs proliferation and decreases the cell numbers at the S phase. AGGF1 also blocks platelet‐derived growth factor‐BB–induced proliferation, migration of VSMCs, increases expression of cyclin D, and decreases expression of p21 and p27. AGGF1 inhibits phenotypic switching of VSMCs to the synthetic phenotype by countering the inhibitory effect of platelet‐derived growth factor‐BB on SRF expression and the formation of the myocardin/SRF/CArG‐box complex involved in activation of VSMCs markers. Finally, we show that AGGF1 inhibits platelet‐derived growth factor‐BB–induced phosphorylation of MEK1/2, ERK1/2, and Elk phosphorylation involved in the phenotypic switching of VSMCs, and that overexpression of Elk abolishes the effect of AGGF1. Conclusions AGGF1 protein therapy is effective in blocking neointimal formation after vascular injury by regulating a novel AGGF1‐MEK1/2‐ERK1/2‐Elk‐myocardin‐SRF/p27 signaling pathway.
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Affiliation(s)
- Yufeng Yao
- Key Laboratory of Molecular Biophysics of the Ministry of Education, Cardio-X Center, College of Life Science and Technology and Center for Human Genome Research, Huazhong University of Science and Technology, Wuhan, China
| | - Zhenkun Hu
- Key Laboratory of Molecular Biophysics of the Ministry of Education, Cardio-X Center, College of Life Science and Technology and Center for Human Genome Research, Huazhong University of Science and Technology, Wuhan, China
| | - Jian Ye
- Key Laboratory of Molecular Biophysics of the Ministry of Education, Cardio-X Center, College of Life Science and Technology and Center for Human Genome Research, Huazhong University of Science and Technology, Wuhan, China
| | - Changqing Hu
- Key Laboratory of Molecular Biophysics of the Ministry of Education, Cardio-X Center, College of Life Science and Technology and Center for Human Genome Research, Huazhong University of Science and Technology, Wuhan, China
| | - Qixue Song
- Key Laboratory of Molecular Biophysics of the Ministry of Education, Cardio-X Center, College of Life Science and Technology and Center for Human Genome Research, Huazhong University of Science and Technology, Wuhan, China
| | - Xingwen Da
- Key Laboratory of Molecular Biophysics of the Ministry of Education, Cardio-X Center, College of Life Science and Technology and Center for Human Genome Research, Huazhong University of Science and Technology, Wuhan, China
| | - Yubin Yu
- Key Laboratory of Molecular Biophysics of the Ministry of Education, Cardio-X Center, College of Life Science and Technology and Center for Human Genome Research, Huazhong University of Science and Technology, Wuhan, China
| | - Hui Li
- Key Laboratory of Molecular Biophysics of the Ministry of Education, Cardio-X Center, College of Life Science and Technology and Center for Human Genome Research, Huazhong University of Science and Technology, Wuhan, China
| | - Chengqi Xu
- Key Laboratory of Molecular Biophysics of the Ministry of Education, Cardio-X Center, College of Life Science and Technology and Center for Human Genome Research, Huazhong University of Science and Technology, Wuhan, China
| | - Qiuyun Chen
- Department of Molecular Cardiology, Center for Cardiovascular Genetics, Lerner Research Institute, Cleveland Clinic, Cleveland, OH .,Department of Molecular Medicine, Cleveland Clinic Lerner College of Medicine, Cleveland, OH
| | - Qing Kenneth Wang
- Key Laboratory of Molecular Biophysics of the Ministry of Education, Cardio-X Center, College of Life Science and Technology and Center for Human Genome Research, Huazhong University of Science and Technology, Wuhan, China .,Department of Molecular Cardiology, Center for Cardiovascular Genetics, Lerner Research Institute, Cleveland Clinic, Cleveland, OH.,Department of Molecular Medicine, Cleveland Clinic Lerner College of Medicine, Cleveland, OH.,Department of Genetics and Genome Sciences, Case Western Reserve University, Cleveland, OH
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Li YQ, Wang JY, Qian ZQ, Li YL, Li WN, Gao Y, Yang DL. Osthole inhibits intimal hyperplasia by regulating the NF-κB and TGF-β1/Smad2 signalling pathways in the rat carotid artery after balloon injury. Eur J Pharmacol 2017. [PMID: 28648404 DOI: 10.1016/j.ejphar.2017.06.025] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Osthole (7-methoxy-8-isopentenoxy-coumarin), a compound extracted from Cnidiummonnieri (L.) Cusson seeds, has been found to exhibit potent therapeutic effects in cancer due to its ability to inhibit inflammation and cell proliferation. However, its effects on arterial wall hypertrophy-related diseases remain unclear. Therefore, in this study, we aimed to investigate the effects of Osthole on intimal hyperplasia in a rat model of carotid artery balloon injury. We established the balloon-induced carotid artery injury rat model in male Sprague-Dawley rats, after which we administered Osthole (20mg/kg/day or 40mg/kg/day) or volume-matched normal saline orally by gavage for 14 consecutive days. Intimal hyperplasia and the degree of vascular smooth muscle cell proliferation were then evaluated by histopathological examination of the changes in the carotid artery, as well as by examination of proliferating cell nuclear antigen (PCNA) expression. Tumour necrosis factor-ɑ (TNF-α), interleukin-1β (IL-1β), transforming growth factor-beta (TGF-β1) and PCNA mRNA expression levels were examined by real-time RT-PCR, while nuclear factor-κB (NF-κB (p65)), IκB-α, TGF-β1 and phospho-Smad2 (p-Smad2) protein expression levels were analysed by immunohistochemistry or western blot analysis. We found that Osthole significantly attenuated neointimal thickness and decreased the elevations in PCNA protein expression induced by balloon injury. Moreover, Osthole down-regulated the pro-inflammatory factors TNF-α and IL-1β and NF-κB (p65), whose expression had been upregulated after balloon injury. Moreover, IκB-α protein expression levels increased following Osthole treatment. In addition, the elevations in TGF-β1 and p-Smad2 protein expression induced by balloon injury were both significantly attenuated by Osthole administration. We concluded that Osthole significantly inhibited neointimal hyperplasia in balloon-induced rat carotid artery injury and that the mechanism by which this occurs may involve NF-κB, IL-1β and TNF-ɑ down-regulation, which alleviates the inflammatory response, and TGF-β1/Smad2 signalling pathway inhibition.
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Affiliation(s)
- Yi-Qi Li
- Joint International Committee of Basic Pharmacology of the Ministry of Education; Key Laboratory of Basic Pharmacology of the Ministry of Education; Key Laboratory of Basic Pharmacology of Guizhou Province, Zunyi Medical University, Zunyi, Guizhou 563099, China; Zunyi Medical University, Zhuhai Campus, Zhuhai, Guangdong 519041, China
| | - Jun-Yi Wang
- Joint International Committee of Basic Pharmacology of the Ministry of Education; Key Laboratory of Basic Pharmacology of the Ministry of Education; Key Laboratory of Basic Pharmacology of Guizhou Province, Zunyi Medical University, Zunyi, Guizhou 563099, China
| | - Zhi-Qiang Qian
- Joint International Committee of Basic Pharmacology of the Ministry of Education; Key Laboratory of Basic Pharmacology of the Ministry of Education; Key Laboratory of Basic Pharmacology of Guizhou Province, Zunyi Medical University, Zunyi, Guizhou 563099, China
| | - Ye-Li Li
- Joint International Committee of Basic Pharmacology of the Ministry of Education; Key Laboratory of Basic Pharmacology of the Ministry of Education; Key Laboratory of Basic Pharmacology of Guizhou Province, Zunyi Medical University, Zunyi, Guizhou 563099, China
| | - Wen-Na Li
- Zunyi Medical University, Zhuhai Campus, Zhuhai, Guangdong 519041, China
| | - Yang Gao
- Joint International Committee of Basic Pharmacology of the Ministry of Education; Key Laboratory of Basic Pharmacology of the Ministry of Education; Key Laboratory of Basic Pharmacology of Guizhou Province, Zunyi Medical University, Zunyi, Guizhou 563099, China
| | - Dan-Li Yang
- Joint International Committee of Basic Pharmacology of the Ministry of Education; Key Laboratory of Basic Pharmacology of the Ministry of Education; Key Laboratory of Basic Pharmacology of Guizhou Province, Zunyi Medical University, Zunyi, Guizhou 563099, China.
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Hu T, Yang C, Fu M, Yang J, Du R, Ran X, Yin T, Wang G. Cytotoxic effects of docetaxel as a candidate drug of drug-eluting stent on human umbilical vein endothelial cells and the signaling pathway of cell migration inhibition, adhesion delay and shape change. Regen Biomater 2017; 4:167-178. [PMID: 28596914 PMCID: PMC5458539 DOI: 10.1093/rb/rbx010] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Revised: 03/12/2017] [Accepted: 03/14/2017] [Indexed: 01/03/2023] Open
Abstract
Docetaxel (DTX), a paclitaxel analogue, can efficiently inhibit proliferation of vascular smooth muscle cells and has broadly been used as an antiangiogenesis drug. However, as a candidate drug of drug-eluting stent, the effects of DTX on human umbilical vein endothelial cells (HUVECs) are still not well understood. Herein, we investigated the effects of DTX on proliferation, apoptosis, adhesion, migration and morphology of HUVECs in vitro. We found that DTX had the cytostatic and cytotoxic effects at low and high concentrations, respectively. DTX could inhibit the proliferation and migration of HUVECs, induce HUVECs apoptosis, delay HUVECs adhesion and decrease spreading area and aspect ratio of individual cells. The signaling pathway that DTX led to the migration inhibition, adhesion delay and shape change of HUVECs is the VE-cadherin mediated integrin β1/FAK/ROCK signaling pathway. The study will provide a theoretical basis for the clinical application of DTX.
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Affiliation(s)
- Tingzhang Hu
- Key Laboratory for Biorheological Science and Technology of Ministry of Education, State and Local Joint Engineering Laboratory for Vascular Implants, Bioengineering College of Chongqing University, Chongqing 400030, China
| | - Chun Yang
- Key Laboratory for Biorheological Science and Technology of Ministry of Education, State and Local Joint Engineering Laboratory for Vascular Implants, Bioengineering College of Chongqing University, Chongqing 400030, China
| | - Meiling Fu
- Key Laboratory for Biorheological Science and Technology of Ministry of Education, State and Local Joint Engineering Laboratory for Vascular Implants, Bioengineering College of Chongqing University, Chongqing 400030, China
| | - Jiali Yang
- Key Laboratory for Biorheological Science and Technology of Ministry of Education, State and Local Joint Engineering Laboratory for Vascular Implants, Bioengineering College of Chongqing University, Chongqing 400030, China
| | - Rolin Du
- Key Laboratory for Biorheological Science and Technology of Ministry of Education, State and Local Joint Engineering Laboratory for Vascular Implants, Bioengineering College of Chongqing University, Chongqing 400030, China
| | - Xiaolin Ran
- Key Laboratory for Biorheological Science and Technology of Ministry of Education, State and Local Joint Engineering Laboratory for Vascular Implants, Bioengineering College of Chongqing University, Chongqing 400030, China
| | - Tieying Yin
- Key Laboratory for Biorheological Science and Technology of Ministry of Education, State and Local Joint Engineering Laboratory for Vascular Implants, Bioengineering College of Chongqing University, Chongqing 400030, China
| | - Guixue Wang
- Key Laboratory for Biorheological Science and Technology of Ministry of Education, State and Local Joint Engineering Laboratory for Vascular Implants, Bioengineering College of Chongqing University, Chongqing 400030, China
- Correspondence address. Key Laboratory for Biorheological Science and Technology of Ministry of Education, State and Local Joint Engineering Laboratory for Vascular Implants, Bioengineering College of Chongqing University, Chongqing 400030, China. Tel: +86(0)23-65112675; Fax: +86(0)23-65112507; E-mail:
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HUCMNCs protect vascular endothelium and prevent ISR after endovascular interventional therapy for vascular diseases in T2DM rabbits. Mol Cell Biochem 2017; 433:161-167. [PMID: 28474283 DOI: 10.1007/s11010-017-3024-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Accepted: 04/01/2017] [Indexed: 12/12/2022]
Abstract
The therapeutic effect of transplantation of human umbilical cord blood cell-derived mononuclear cells (HUCMNCs) on treating in-stent restenosis (ISR) after endovascular interventional therapy (EIT) was evaluated in preclinical rabbit model of type 2 diabetes mellitus (T2DM)-related peripheral artery disease (PAD). HUCMNCs were transplanted to T2DM rabbits subjected to femoral artery occlusion surgery and received EIT. Serum concentration of soluble vascular endothelial cadherin (VE-cad) and plasma concentration of lipoprotein-associated phospholipase A2 (Lp-PLA2) were determined with enzyme-linked immunosorbent assay before and after the transplantation. The injury and the recovery of right femoral artery at stenting site were evaluated with Hematoxylin and Eosin (HE) staining. HUCMNCs purified from umbilical cord blood were 100% CD45+ and 96.5% CD34- with round or oval morphology and adherent growth pattern. The soluble VE-cad and Lp-PLA2 were significantly attenuated after HUCMNC transplantation. The intimal area and the ratio between intimal area and medium film area in the dilated occlusion site were also dramatically decreased 4 weeks after receiving HUCMNCs. HUCMNC transplantation is effective in protecting vascular endothelial function and preventing ISR after EIT in T2DM rabbits suffering from PAD.
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64
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Srinivasan VM, Mokin M, Duckworth EAM, Chen S, Puri A, Kan P. Tourniquet parent artery occlusion after flow diversion. J Neurointerv Surg 2017; 10:122-126. [PMID: 28265011 DOI: 10.1136/neurintsurg-2016-012937] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Revised: 02/03/2017] [Accepted: 02/09/2017] [Indexed: 12/31/2022]
Abstract
BACKGROUND The Pipeline Embolization Device (PED) is increasingly used for both on- and off-label purposes for treatment of intracranial aneurysms. The device gradually slows flow of blood into the aneurysm, but the high metal coverage of PED promotes endothelialization of the device. Occasionally, this leads to in-stent stenosis that is clinically well tolerated. We present a multi-institutional Pipeline series that includes three cases of gradual asymptomatic occlusion within the PED and parent vessel. METHODS Institutional databases at each participating center were searched for patients treated with the PED. Patients with at least 50% stenosis or occlusion were selected and all relevant clinical and radiographic data were reviewed. RESULTS A total of 326 cases performed by five neurointerventionalists across four institutions were reviewed. Among these there were three cases of complete occlusion and two cases of stenosis of more than 50%, for an occlusion rate of 0.9%. All patients were clinically asymptomatic. CONCLUSIONS A gradual tourniquet-like occlusion can occur following placement of the PED, leading to vessel occlusion. This has been clinically well tolerated by patients in our series due to the formation of pial collaterals as the stenosis progresses, likely due to ischemic preconditioning. Small parent vessel, pre-existing stenosis, fusiform pathology, overlapping devices, and suboptimal antiplatelet therapy seem to be predisposing factors. Further experience and follow-up will allow us to characterize the risk factors and optimize post-procedural therapy for these patients.
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Affiliation(s)
| | - Maxim Mokin
- Department of Neurosurgery, University of South Florida, Tampa, Florida, USA
| | | | - Stephen Chen
- Department of Radiology, Baylor College of Medicine, Houston, Texas, USA
| | - Ajit Puri
- Department of Radiology, University of Massachusetts Medical School, Worcester, Massachusetts, USA
| | - Peter Kan
- Department of Neurosurgery, Baylor College of Medicine, Houston, Texas, USA
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Chen C, Yao C, Yang J, Luo D, Kong X, Chung SM, Lee IS. Biomimetic apatite formed on cobalt-chromium alloy: A polymer-free carrier for drug eluting stent. Colloids Surf B Biointerfaces 2017; 151:156-164. [DOI: 10.1016/j.colsurfb.2016.12.021] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Accepted: 12/14/2016] [Indexed: 12/16/2022]
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66
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Chen W, Clauser J, Thiebes AL, McGrath DJ, Kelly N, van Steenbergen MJ, Jockenhoevel S, Steinseifer U, McHugh PE, Hennink WE, Kok RJ. Gefitinib/gefitinib microspheres loaded polyurethane constructs as drug-eluting stent coating. Eur J Pharm Sci 2017; 103:94-103. [PMID: 28179132 DOI: 10.1016/j.ejps.2017.02.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2016] [Revised: 01/28/2017] [Accepted: 02/02/2017] [Indexed: 12/16/2022]
Abstract
One of the complications of bronchotracheal cancer is obstruction of the upper airways. Local tumor resection in combination with an airway stent can suppress intraluminal tumor (re)growth. We have investigated a novel drug-eluting stent coating for local release of the anticancer drug gefitinib. A polyurethane (PU) sandwich construct was prepared by a spray coating method in which gefitinib was embedded between a PU support layer of 200μm and a PU top layer of 50-200μm. Gefitinib was either embedded in the construct as small crystals or as gefitinib-loaded poly(lactic-co-glycolic acid) (PLGA) microspheres (MSP). The drug was incorporated in the PU constructs with high recovery (83-93%), and the spray coating procedure did not affect the morphologies of the embedded microspheres as demonstrated by scanning electron microscopy (SEM), confocal laser scanning microscopy and fluorescence microscopy analysis. PU constructs loaded with gefitinib crystals released the drug for 7-21days and showed diffusion based release kinetics. Importantly, directional release of the drug towards the top layer, which is supposed to face the tumor mass, was controlled by the thicknesses of the PU top layer. PU constructs loaded with gefitinib microspheres released the drug in a sustained manner for >6months indicating that drug release from the microspheres became the rate limiting step. In conclusion, the sandwich structure of drug-loaded PLGA microspheres in PU coating is a promising coating for airway stents that release anticancer drugs locally for a prolonged time.
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Affiliation(s)
- Weiluan Chen
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, The Netherlands
| | - Johanna Clauser
- Department of Cardiovascular Engineering, Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, Pauwelsstraße 20, 52074, Germany
| | - Anja Lena Thiebes
- Department of Biohybrid & Medical Textiles (BioTex), AME-Helmholtz Institute for Biomedical Engineering, ITA-Institut für Textiltechnik, RWTH Aachen University, Aachen, Germany
| | - Donnacha J McGrath
- Biomechanics Research Centre, Biomedical Engineering, College of Engineering and Informatics, National University of Ireland, University Road, Galway, Ireland
| | - Nicola Kelly
- Biomechanics Research Centre, Biomedical Engineering, College of Engineering and Informatics, National University of Ireland, University Road, Galway, Ireland
| | - Mies J van Steenbergen
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, The Netherlands
| | - Stefan Jockenhoevel
- Department of Biohybrid & Medical Textiles (BioTex), AME-Helmholtz Institute for Biomedical Engineering, ITA-Institut für Textiltechnik, RWTH Aachen University, Aachen, Germany
| | - Ulrich Steinseifer
- Department of Cardiovascular Engineering, Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, Pauwelsstraße 20, 52074, Germany
| | - Peter E McHugh
- Biomechanics Research Centre, Biomedical Engineering, College of Engineering and Informatics, National University of Ireland, University Road, Galway, Ireland
| | - Wim E Hennink
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, The Netherlands
| | - Robbert J Kok
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, The Netherlands.
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Stents: Biomechanics, Biomaterials, and Insights from Computational Modeling. Ann Biomed Eng 2017; 45:853-872. [PMID: 28160103 DOI: 10.1007/s10439-017-1806-8] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Accepted: 01/28/2017] [Indexed: 01/02/2023]
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Castellanos MI, Guillem-Marti J, Mas-Moruno C, Díaz-Ricart M, Escolar G, Ginebra MP, Gil FJ, Pegueroles M, Manero JM. Cell adhesive peptides functionalized on CoCr alloy stimulate endothelialization and prevent thrombogenesis and restenosis. J Biomed Mater Res A 2017; 105:973-983. [DOI: 10.1002/jbm.a.35988] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2016] [Revised: 12/14/2016] [Accepted: 12/15/2016] [Indexed: 01/26/2023]
Affiliation(s)
- Maria Isabel Castellanos
- Biomaterials; Biomechanics and Tissue Engineering Group, Department of Materials Science and Metallurgical Engineering, ETSEIB, Technical University of Catalonia (UPC); Barcelona 08028 Spain
- Centre for Research in NanoEngineering (CRNE); UPC; Barcelona 08028 Spain
| | - Jordi Guillem-Marti
- Biomaterials; Biomechanics and Tissue Engineering Group, Department of Materials Science and Metallurgical Engineering, ETSEIB, Technical University of Catalonia (UPC); Barcelona 08028 Spain
- Centre for Research in NanoEngineering (CRNE); UPC; Barcelona 08028 Spain
| | - Carlos Mas-Moruno
- Biomaterials; Biomechanics and Tissue Engineering Group, Department of Materials Science and Metallurgical Engineering, ETSEIB, Technical University of Catalonia (UPC); Barcelona 08028 Spain
- Centre for Research in NanoEngineering (CRNE); UPC; Barcelona 08028 Spain
| | - Maribel Díaz-Ricart
- Hemotherapy-Hemostasis Department; Centre de Diagnòstic Biomèdic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Hospital Clinic, Universitat de Barcelona; Barcelona 08036 Spain
| | - Ginés Escolar
- Hemotherapy-Hemostasis Department; Centre de Diagnòstic Biomèdic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Hospital Clinic, Universitat de Barcelona; Barcelona 08036 Spain
| | - Maria Pau Ginebra
- Biomaterials; Biomechanics and Tissue Engineering Group, Department of Materials Science and Metallurgical Engineering, ETSEIB, Technical University of Catalonia (UPC); Barcelona 08028 Spain
- Centre for Research in NanoEngineering (CRNE); UPC; Barcelona 08028 Spain
- Institute for Bioengineering of Catalonia (IBEC); Barcelona 08028 Spain
| | | | - Marta Pegueroles
- Biomaterials; Biomechanics and Tissue Engineering Group, Department of Materials Science and Metallurgical Engineering, ETSEIB, Technical University of Catalonia (UPC); Barcelona 08028 Spain
- Centre for Research in NanoEngineering (CRNE); UPC; Barcelona 08028 Spain
| | - Jose María Manero
- Biomaterials; Biomechanics and Tissue Engineering Group, Department of Materials Science and Metallurgical Engineering, ETSEIB, Technical University of Catalonia (UPC); Barcelona 08028 Spain
- Centre for Research in NanoEngineering (CRNE); UPC; Barcelona 08028 Spain
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Thakkar AS, Dave BA. Revolution of Drug-Eluting Coronary Stents: An Analysis of Market Leaders. EUROPEAN MEDICAL JOURNAL 2016. [DOI: 10.33590/emj/10314703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023] Open
Abstract
Percutaneous coronary intervention with drug-eluting stents (DES) is a well-established and widely-accepted treatment approach in patients with coronary artery disease. Although the underlying principle of DES remains constant for different stents available on the market, certain factors may offer variations with respect to deliverability (ease of placement), efficacy (preventing restenosis), and safety (thrombosis rates). These factors may include the type of drug (sirolimus, everolimus, biolimus, zotarolimus, novolimus, paclitaxel, docetaxel), type of stent platforms (stainless steel, platinum, cobalt-chromium, cobalt-nickel, platinum-chromium), type of polymers (permanent, biodegradable, polymer-free), thickness of stent struts (thick, thin, ultra-thin), type of coating (abluminal, conformal), and type of stent design (open-cell, closed-cell, combination of open-closed cell). In this context, we present a review on characteristic features of several of the most widely used coronary stents worldwide. Furthermore, the advancements of completely biodegradable stents are discussed. In addition, the future directions for the development of creating an ideal or perfect DES are debated.
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Affiliation(s)
| | - Bhargav A. Dave
- Manish Therapy Services, Madison Heights, Texas, USA; Department of Physical Therapy, Srinivas University, Mangaluru, Karnataka, India
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Miswan Z, Lukman SK, Abd Majid FA, Loke MF, Saidin S, Hermawan H. Drug-eluting coating of ginsenoside Rg1 and Re incorporated poly(lactic- co -glycolic acid) on stainless steel 316L: Physicochemical and drug release analyses. Int J Pharm 2016; 515:460-466. [DOI: 10.1016/j.ijpharm.2016.10.056] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2016] [Revised: 10/05/2016] [Accepted: 10/24/2016] [Indexed: 12/12/2022]
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Tramutola A, Lanzillotta C, Di Domenico F. Targeting mTOR to reduce Alzheimer-related cognitive decline: from current hits to future therapies. Expert Rev Neurother 2016; 17:33-45. [PMID: 27690737 DOI: 10.1080/14737175.2017.1244482] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
INTRODUCTION The mTOR pathway is involved in the regulation of a wide repertoire of cellular functions in the brain and its dysregulation is emerging as a leitmotif in a large number of neurological disorders. In AD, altered mTOR signaling contributes to the inhibition of autophagy deposition of Aβ and tau aggregates and to the alteration of several neuronal metabolic pathways. Areas covered: In this review, we report all the current findings on the use of mTOR inhibitors (rapamycin, rapalogues) in the treatment of AD. These results support the role of mTOR inhibitors as potential therapeutic agents able to reduce AD hallmarks and recover cognitive performances. Expert commentary: Despite mTOR inhibitors appearing to be ideal compounds to counteract AD, further studies are needed in order to gain knowledge on the involvement of aberrant mTOR in AD, and to standardize a valuable therapeutic approach that can be translated to humans.
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Affiliation(s)
- Antonella Tramutola
- a Department of Biochemical Sciences , Sapienza University of Rome , Rome , Italy
| | - Chiara Lanzillotta
- a Department of Biochemical Sciences , Sapienza University of Rome , Rome , Italy
| | - Fabio Di Domenico
- a Department of Biochemical Sciences , Sapienza University of Rome , Rome , Italy
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Gu X, Mao Z, Ye SH, Koo Y, Yun Y, Tiasha TR, Shanov V, Wagner WR. Biodegradable, elastomeric coatings with controlled anti-proliferative agent release for magnesium-based cardiovascular stents. Colloids Surf B Biointerfaces 2016; 144:170-179. [DOI: 10.1016/j.colsurfb.2016.03.086] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2015] [Revised: 03/24/2016] [Accepted: 03/31/2016] [Indexed: 01/16/2023]
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Theodoropoulos K, Mennuni MG, Dangas GD, Meelu OA, Bansilal S, Baber U, Sartori S, Kovacic JC, Moreno PR, Sharma SK, Mehran R, Kini AS. Resistant in-stent restenosis in the drug eluting stent era. Catheter Cardiovasc Interv 2016; 88:777-785. [DOI: 10.1002/ccd.26559] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Revised: 03/01/2016] [Accepted: 03/21/2016] [Indexed: 01/09/2023]
Affiliation(s)
- Kleanthis Theodoropoulos
- Interventional Cardiovascular Research and Clinical Trials, The Icahn School of Medicine at Mount Sinai; New York New York
| | - Marco G. Mennuni
- Interventional Cardiovascular Research and Clinical Trials, The Icahn School of Medicine at Mount Sinai; New York New York
- Division of Clinical and Interventional Cardiology; Humanitas Research Hospital; Rozzano Milan Italy
| | - George D. Dangas
- Interventional Cardiovascular Research and Clinical Trials, The Icahn School of Medicine at Mount Sinai; New York New York
| | - Omar A. Meelu
- Interventional Cardiovascular Research and Clinical Trials, The Icahn School of Medicine at Mount Sinai; New York New York
| | - Sameer Bansilal
- Interventional Cardiovascular Research and Clinical Trials, The Icahn School of Medicine at Mount Sinai; New York New York
| | - Usman Baber
- Interventional Cardiovascular Research and Clinical Trials, The Icahn School of Medicine at Mount Sinai; New York New York
| | - Samantha Sartori
- Interventional Cardiovascular Research and Clinical Trials, The Icahn School of Medicine at Mount Sinai; New York New York
| | - Jason C. Kovacic
- Interventional Cardiovascular Research and Clinical Trials, The Icahn School of Medicine at Mount Sinai; New York New York
| | - Pedro R. Moreno
- Interventional Cardiovascular Research and Clinical Trials, The Icahn School of Medicine at Mount Sinai; New York New York
| | - Samin K. Sharma
- Interventional Cardiovascular Research and Clinical Trials, The Icahn School of Medicine at Mount Sinai; New York New York
| | - Roxana Mehran
- Interventional Cardiovascular Research and Clinical Trials, The Icahn School of Medicine at Mount Sinai; New York New York
| | - Annapoorna S. Kini
- Interventional Cardiovascular Research and Clinical Trials, The Icahn School of Medicine at Mount Sinai; New York New York
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Endothelialization and the bioactivity of Ca-P coatings of different Ca/P stoichiometry electrodeposited on the Nitinol superelastic alloy. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 62:28-35. [DOI: 10.1016/j.msec.2016.01.036] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 11/30/2015] [Accepted: 01/15/2016] [Indexed: 01/11/2023]
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Seo J, Lee J, Na K. Polymeric materials for drug release system in drug eluting stents. JOURNAL OF PHARMACEUTICAL INVESTIGATION 2016. [DOI: 10.1007/s40005-016-0251-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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77
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JC Bose R, Lee SH, Park H. Lipid polymer hybrid nanospheres encapsulating antiproliferative agents for stent applications. J IND ENG CHEM 2016. [DOI: 10.1016/j.jiec.2016.02.015] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Meng M, Gao B, Wang X, Bai ZG, Sa RN, Ge B. Long-term clinical outcomes of everolimus-eluting stent versus paclitaxel-eluting stent in patients undergoing percutaneous coronary interventions: a meta-analysis. BMC Cardiovasc Disord 2016; 16:34. [PMID: 26860585 PMCID: PMC4748592 DOI: 10.1186/s12872-016-0206-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2015] [Accepted: 01/29/2016] [Indexed: 01/24/2023] Open
Abstract
BACKGROUND Everolimus -eluting stent (EES) is common used in patients undergoing percutaneous coronary interventions (PCI). Our purpose is to evaluate long-term clinical outcomes of everolimus -eluting stent (EES) versus paclitaxel-eluting stent (PES) in patients undergoing percutaneous coronaryinterventions (PCI) in randomized controlled trials (RCTs). METHODS We searched Medline, EMBASE, Cochrane Library, CNKI, VIP and relevant websites ( https://scholar-google-com.ezproxy.lib.usf.edu/ ) for articles to compare outcomes between everolimus-eluting stent and paclitaxel-eluting stent without language or date restriction. RCTs that compared the use of everolimus -eluting stent and paclitaxel-eluting stent in PCI were included. Variables relating to patient, study characteristics, and clinical endpoints were extracted. Meta-analysis was performed using RevMan 5.2 software. RESULTS We identified 6 published studies (from three randomized trials) more on everolimus-eluting stent (n = 3352) than paclitaxel-eluting (n = 1639), with follow-up duration ranging from 3, 4 and 5 years. Three-year outcomes of everolimus-eluting stent compared to paclitaxel-eluting were as following: the everolimus-eluting stent significantly reduced all-cause death (relative risk [RR]:0.63; 95% confidence interval [CI]: 0.46. to 0.82), MACE (RR: 0.56; 95% CI: 0.41 to 0.77), MI (RR: 0.64; 95% CI: 0.48 to 0.86), TLR (RR: 0.72; 95% CI: 0.59 to 0.88), ID-TLR (RR: 0.74; 95% CI: 0.59 to 0.92) and ST (RR: 0.54; 95% CI: 0.32 to 0.90). There was no difference in TVR between the everolimus-eluting and paclitaxel-eluting (RR: 0.76; 95% CI: 0.58 to 1.10); Four-year outcomes of everolimus-eluting compared to paclitaxel-eluting: the everolimus-eluting significantly reduced MACE (RR: 0.44; 95% CI: 0.18 to 0.98) and ID-TLR (RR: 0.47; 95 % CI: 0.23 to 0.97). There was no difference in MI (RR: 0.48; 95% CI: 0.16 to 1.46), TLR (RR: 0.46; 95% CI: 0.20 to 1.04) and ST ((RR: 0.34; 95% CI: 0.05 to 2.39). Five-year outcomes of everolimus-eluting stent compared to paclitaxel-eluting: There was no difference in ID-TLR (RR: 0.67; 95% CI: 0.45 to 1.02) and ST (RR: 0.71; 95% CI: 0.28 to 1.80). CONCLUSIONS In the present meta-analysis, everolimus-eluting appeared to be safe and clinically effective in patients undergoing PCI in comparison to PES in 3-year clinical outcomes; there was similar no difference in reduction of ST between EES and PES in long-term(≥ 4 years) clinical follow-ups. Everolimus-eluting is more safety than paclitaxel-eluting in long-term clinical follow-ups, whether these effects can be applied to different patient subgroups warrants further investigation.
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Affiliation(s)
- Min Meng
- Department of Pharmacy, Gansu Provincial Hospital, Donggang West Road No. 204, Lanzhou, Gansu, 730000, China.
| | - Bei Gao
- Department of Pharmacy, Gansu Provincial Hospital, Donggang West Road No. 204, Lanzhou, Gansu, 730000, China.
| | - Xia Wang
- Department of Pharmacy, Gansu Provincial Hospital, Donggang West Road No. 204, Lanzhou, Gansu, 730000, China.
| | - Zheng-gang Bai
- Evidence-Based Medicine Center, Lanzhou University, Lanzhou, Gansu, 730000, China.
| | - Ri-Na Sa
- Department of Pharmacy, Gansu Provincial Hospital, Donggang West Road No. 204, Lanzhou, Gansu, 730000, China.
| | - Bin Ge
- Department of Pharmacy, Gansu Provincial Hospital, Donggang West Road No. 204, Lanzhou, Gansu, 730000, China.
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Slee JB, Alferiev IS, Nagaswami C, Weisel JW, Levy RJ, Fishbein I, Stachelek SJ. Enhanced biocompatibility of CD47-functionalized vascular stents. Biomaterials 2016; 87:82-92. [PMID: 26914699 DOI: 10.1016/j.biomaterials.2016.02.008] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2015] [Revised: 01/27/2016] [Accepted: 02/07/2016] [Indexed: 12/21/2022]
Abstract
The effectiveness of endovascular stents is hindered by in-stent restenosis (ISR), a secondary re-obstruction of treated arteries due to unresolved inflammation and activation of smooth muscle cells in the arterial wall. We previously demonstrated that immobilized CD47, a ubiquitously expressed transmembrane protein with an established role in immune evasion, can confer biocompatibility when appended to polymeric surfaces. In present studies, we test the hypothesis that CD47 immobilized onto metallic surfaces of stents can effectively inhibit the inflammatory response thus mitigating ISR. Recombinant CD47 (recCD47) or a peptide sequence corresponding to the Ig domain of CD47 (pepCD47), were attached to the surfaces of both 316L-grade stainless steel foils and stents using bisphosphonate coordination chemistry and thiol-based conjugation reactions to assess the anti-inflammatory properties of CD47-functionalized surfaces. Initial in vitro and ex vivo analysis demonstrated that both recCD47 and pepCD47 significantly reduced inflammatory cell attachment to steel surfaces without impeding on endothelial cell retention and expansion. Using a rat carotid stent model, we showed that pepCD47-functionalized stents prevented fibrin and platelet thrombus deposition, inhibited inflammatory cell attachment, and reduced restenosis by 30%. It is concluded that CD47-modified stent surfaces mitigate platelet and inflammatory cell attachment, thereby disrupting ISR pathophysiology.
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Affiliation(s)
- Joshua B Slee
- Division of Cardiology, Department of Pediatrics, The Children's Hospital of Philadelphia, USA; Perelman School of Medicine, The University of Pennsylvania, USA
| | - Ivan S Alferiev
- Division of Cardiology, Department of Pediatrics, The Children's Hospital of Philadelphia, USA; Perelman School of Medicine, The University of Pennsylvania, USA
| | - Chandrasekaran Nagaswami
- Department of Cell and Developmental Biology, Perelman School of Medicine, The University of Pennsylvania, USA
| | - John W Weisel
- Department of Cell and Developmental Biology, Perelman School of Medicine, The University of Pennsylvania, USA
| | - Robert J Levy
- Division of Cardiology, Department of Pediatrics, The Children's Hospital of Philadelphia, USA; Perelman School of Medicine, The University of Pennsylvania, USA
| | - Ilia Fishbein
- Division of Cardiology, Department of Pediatrics, The Children's Hospital of Philadelphia, USA; Perelman School of Medicine, The University of Pennsylvania, USA.
| | - Stanley J Stachelek
- Division of Cardiology, Department of Pediatrics, The Children's Hospital of Philadelphia, USA; Perelman School of Medicine, The University of Pennsylvania, USA.
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80
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Lutzke A, Neufeld BH, Neufeld MJ, Reynolds MM. Nitric oxide release from a biodegradable cysteine-based polyphosphazene. J Mater Chem B 2016; 4:1987-1998. [DOI: 10.1039/c6tb00037a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
First report of nitric oxide (NO) release from a biodegradable polyphosphazene containing theS-nitrosothiol NO donor group.
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Affiliation(s)
- Alec Lutzke
- Department of Chemistry
- Colorado State University
- Fort Collins
- USA
| | | | | | - Melissa M. Reynolds
- Department of Chemistry
- Colorado State University
- Fort Collins
- USA
- School of Biomedical Engineering
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81
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Kasturi S, Polasa S, Singh S, Reddy VK, Rao K, Mathan G, Bandimida SK, Pendyala M, Challa C. Safety and Efficacy of a Novel Everolimus-Eluting Stent System in “Real-World” Patients with Coronary Artery Disease: A Report of Preliminary Outcomes. ACTA ACUST UNITED AC 2016. [DOI: 10.4236/wjcd.2016.612049] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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82
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Bukala J, Kwiatkowski P, Malachowski J. Numerical analysis of stent expansion process in coronary artery stenosis with the use of non-compliant balloon. Biocybern Biomed Eng 2016. [DOI: 10.1016/j.bbe.2015.10.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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83
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Ji MS, Jeong MH, Ahn YK, Kim SH, Kim YJ, Chae SC, Hong TJ, Seong IW, Chae JK, Kim CJ, Cho MC, Rha SW, Bae JH, Seung KB, Park SJ, Hur SH. Comparison of Resolute zotarolimus-eluting stents versus everolimus-eluting stents in patients with metabolic syndrome and acute myocardial infarction: propensity score-matched analysis. Int J Cardiol 2015; 199:53-62. [PMID: 26186631 DOI: 10.1016/j.ijcard.2015.07.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/27/2015] [Revised: 06/21/2015] [Accepted: 07/02/2015] [Indexed: 11/30/2022]
Abstract
BACKGROUND Despite common use of second-generation drug-eluting stents in treating patients with coronary artery disease, there is lack of data comparing these stents exclusively in patients with acute myocardial infarction (AMI), especially with metabolic syndrome (MetS), which is highly prevalent in AMI and potential to worsen clinical outcomes. The aim of this study was to compare clinical outcomes of everolimus-eluting stent (EES) and Resolute-zotarolimus-eluting stent (R-ZES) in AMI patients with MetS, in terms of stent-related and patient-related outcomes. METHODS A total of 3942 AMI patients in the KAMIR (Korea Acute Myocardial Infarction Registry) were grouped according to the presence of MetS and stent type: EES (N=1582) and R-ZES (N=255) in MetS (1837). Target lesion failure (TLF) and patient-oriented composite events (POCE) at 1 year were evaluated. RESULTS In MetS patients, TLF (3.7% vs. 2.7%, p=0.592) and POCE (7.9% vs. 6.7%, p=0.764) were similar between EES and R-ZES. Also in Non-MetS patients, TLF (3.9% vs. 3.1%, p=0.307) and POCE (6.4% vs. 7.3%, p=0.866) were similar between 2 groups. TLF was similar between MetS and Non-MetS patients (3.6% vs. 3.8%), while POCEs (7.7% vs. 6.6%) were higher in MetS. Propensity-score matching analysis showed similar results between stent groups in MetS and Non-MetS. In multivariate analysis, left ventricular ejection fraction and symptom-to-door time were independent predictors of TLF and POCE in MetS patients with AMI. CONCLUSIONS In MetS patients with AMI, EES and R-ZES showed excellent performance and safety. However, patient-oriented composite events were relatively high, suggesting more efforts to improve them.
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Affiliation(s)
- Mi Seon Ji
- Chonnam National University Hospital, Korea Acute Myocardial infarction Registry (KAMIR) Study Group of Korean Circulation Society, Republic of Korea
| | - Myung Ho Jeong
- Chonnam National University Hospital, Korea Acute Myocardial infarction Registry (KAMIR) Study Group of Korean Circulation Society, Republic of Korea.
| | - Young Keun Ahn
- Chonnam National University Hospital, Korea Acute Myocardial infarction Registry (KAMIR) Study Group of Korean Circulation Society, Republic of Korea
| | - Sang Hyung Kim
- Chonnam National University Hospital, Korea Acute Myocardial infarction Registry (KAMIR) Study Group of Korean Circulation Society, Republic of Korea
| | - Young Jo Kim
- YeungnamUniversityHospital, Korea Acute Myocardial infarction Registry (KAMIR) Study Group of Korean Circulation Society, Republic of Korea
| | - Shung Chull Chae
- Kyungpook National University Hospital, Korea Acute Myocardial infarction Registry (KAMIR) Study Group of Korean Circulation Society, Republic of Korea
| | - Taek Jong Hong
- Pusan National University Hospital, Korea Acute Myocardial infarction Registry (KAMIR) Study Group of Korean Circulation Society, Republic of Korea
| | - In Whan Seong
- Chungnam National University Hospital, Korea Acute Myocardial infarction Registry (KAMIR) Study Group of Korean Circulation Society, Republic of Korea
| | - Jei Keon Chae
- Chonbuk National University Hospital, Korea Acute Myocardial infarction Registry (KAMIR) Study Group of Korean Circulation Society, Republic of Korea
| | - Chong Jin Kim
- Kyung Hee University Hospital, Korea Acute Myocardial infarction Registry (KAMIR) Study Group of Korean Circulation Society, Republic of Korea
| | - Myeong Chan Cho
- Chungbuk National University Hospital, Korea Acute Myocardial infarction Registry (KAMIR) Study Group of Korean Circulation Society, Republic of Korea
| | - Seung-Woon Rha
- Korea University Guro Hospital, Korea Acute Myocardial infarction Registry (KAMIR) Study Group of Korean Circulation Society, Republic of Korea
| | - Jang Ho Bae
- Konyang University Hospital, Korea Acute Myocardial infarction Registry (KAMIR) Study Group of Korean Circulation Society, Republic of Korea
| | - Ki Bae Seung
- Catholic University Hospital, Korea Acute Myocardial infarction Registry (KAMIR) Study Group of Korean Circulation Society, Republic of Korea
| | - Seung Jung Park
- Asan Medical Center, Korea Acute Myocardial infarction Registry (KAMIR) Study Group of Korean Circulation Society, Republic of Korea
| | - Seung Ho Hur
- Keimyung University Hospital, Korea Acute Myocardial infarction Registry (KAMIR) Study Group of Korean Circulation Society, Republic of Korea
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84
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Wei Y, Zhang JX, Ji Y, Ji J. REDV/Rapamycin-loaded polymer combinations as a coordinated strategy to enhance endothelial cells selectivity for a stent system. Colloids Surf B Biointerfaces 2015; 136:1166-73. [PMID: 26613858 DOI: 10.1016/j.colsurfb.2015.11.012] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2015] [Revised: 09/13/2015] [Accepted: 11/06/2015] [Indexed: 12/25/2022]
Abstract
A major challenge in the development of drug eluting stent platform is the sustained inhibition of smooth muscle cell (SMC) proliferation while endothelial cell (EC) coverage is promoted. We demonstrated in this study that the combination of rapamycin-loaded polymer base layer and Arg-Glu-Asp-Val (REDV) peptide tethered top layer is a coordinated strategy to enhance EC-specific selectivity. A 2-methacryloyloxyethyl phosphorylcholine(MPC)-co-n-stearyl methacrylate (SMA) [PMS] film was prepared as a base coating to load rapamycin. MPC-co-SMA-co-p-nitrophenyloxycarbonyl polyethyleneglycol methacrylate (MEONP) [PMSN] was synthesized to form the top layer, which conjugated the EC-specific ligand REDV peptide that promotes EC attachment. The top layer functioned as a diffusion barrier, and the polymer film can sustain the rapamycin release of for over 120 days. The In vitro cell behavior of EC and SMC indicated that the rapamycin loaded polymer film inhibited cell growth in the first few days of drug release. After 8 days of drug release, the composite coating consistently resisted the nonspecific adsorption of SMC, whereas REDV enhanced EC attachment specifically. A rabbit iliac injury model was used to evaluate the in vivo of the application of this kind of surface-modified stainless steel stent. The composite polymer coating approach could significantly promote re-endothelialization without causing neointimal hyperplasia. The combination of an EC-specific ligand with rapamycin-loaded polymeric coating may potentially be an effective therapeutic alternative to improve currently available drug-eluting stents.
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Affiliation(s)
- Yu Wei
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China; Department of Chemistry and Chemical Engineering, Huanghuai University, Zhumadian 463000, China.
| | - Jing-xun Zhang
- Department of Chemistry and Chemical Engineering, Huanghuai University, Zhumadian 463000, China
| | - Ying Ji
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Jian Ji
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China.
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85
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Lance KD, Good SD, Mendes TS, Ishikiriyama M, Chew P, Estes LS, Yamada K, Mudumba S, Bhisitkul RB, Desai TA. In Vitro and In Vivo Sustained Zero-Order Delivery of Rapamycin (Sirolimus) From a Biodegradable Intraocular Device. Invest Ophthalmol Vis Sci 2015; 56:7331-7. [PMID: 26559479 PMCID: PMC4642602 DOI: 10.1167/iovs.15-17757] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2015] [Accepted: 10/16/2015] [Indexed: 12/16/2022] Open
Abstract
PURPOSE We created implantable intraocular devices capable of constant and continuous rapamycin release on the scale of months to years. METHODS Polycaprolactone (PCL) thin films were used to encapsulate rapamycin to create implantable and biodegradable intraocular devices. Different film devices were studied by modifying the size, thickness, and porosity of the PCL films. RESULTS In vitro release of rapamycin was observed to be constant (zero-order) through 14 weeks of study. Release rates were tunable by altering PCL film porosity and thickness. In vivo release of rapamycin was observed out through 16 weeks with concentrations in the retina-choroid in the therapeutic range. Rapamycin concentration in the blood was below the lower limit of quantification. The drug remaining in the device was chemically stable in vitro and in vivo, and was sufficient to last for upwards of 2 years of total release. The mechanism of release is related to the dissolution kinetics of crystalline rapamycin. CONCLUSIONS Microporous PCL thin film devices demonstrate good ocular compatibility and the ability to release rapamycin locally to the eye over the course of many weeks.
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Affiliation(s)
- Kevin D. Lance
- University of California at Berkeley–University of California, San Francisco Bioengineering Graduate Program, San Francisco, California, United States
| | - Samuel D. Good
- Department of Ophthalmology, University of California, San Francisco, San Francisco, California, United States
| | - Thaís S. Mendes
- Department of Ophthalmology, University of California, San Francisco, San Francisco, California, United States
| | - Mynna Ishikiriyama
- Department of Ophthalmology, University of California, San Francisco, San Francisco, California, United States
| | - Patrick Chew
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, San Francisco, California, United States
| | - Laurel S. Estes
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, San Francisco, California, United States
| | - Kazuhito Yamada
- Pharmaceutical Development Group, Pharmaceutical Development Center, Santen Pharmaceutical Co., Ltd., Nara, Japan
| | - Sri Mudumba
- Pharmaceutical Development, Santen, Inc., Emeryville, California, United States
| | - Robert B. Bhisitkul
- Department of Ophthalmology, University of California, San Francisco, San Francisco, California, United States
| | - Tejal A. Desai
- University of California at Berkeley–University of California, San Francisco Bioengineering Graduate Program, San Francisco, California, United States
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, San Francisco, California, United States
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86
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Trant JF, Sran I, de Bruyn JR, Ingratta M, Borecki A, Gillies ER. Synthesis and properties of arborescent polyisobutylene derivatives and a paclitaxel conjugate: Towards stent coatings with prolonged drug release. Eur Polym J 2015. [DOI: 10.1016/j.eurpolymj.2015.09.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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87
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Wei Y, Zhang J, Li H, Zhang L, Bi H. Multifunctional copolymer coating of polyethylene glycol, glycidyl methacrylate, and REDV to enhance the selectivity of endothelial cells. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2015; 26:1357-71. [DOI: 10.1080/09205063.2015.1095024] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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88
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Hayward SL, Francis DM, Sis MJ, Kidambi S. Ionic Driven Embedment of Hyaluronic Acid Coated Liposomes in Polyelectrolyte Multilayer Films for Local Therapeutic Delivery. Sci Rep 2015; 5:14683. [PMID: 26423010 PMCID: PMC4589783 DOI: 10.1038/srep14683] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Accepted: 09/07/2015] [Indexed: 02/07/2023] Open
Abstract
The ability to control the spatial distribution and temporal release of a therapeutic remains a central challenge for biomedical research. Here, we report the development and optimization of a novel substrate mediated therapeutic delivery system comprising of hyaluronic acid covalently functionalized liposomes (HALNPs) embedded into polyelectrolyte multilayer (PEM) platform via ionic stabilization. The PEM platform was constructed from sequential deposition of Poly-L-Lysine (PLL) and Poly(Sodium styrene sulfonate) (SPS) "(PLL/SPS)4.5" followed by adsorption of anionic HALNPs. An adsorption affinity assay and saturation curve illustrated the preferential HALNP deposition density for precise therapeutic loading. (PLL/SPS)2.5 capping layer on top of the deposited HALNP monolayer further facilitated complete nanoparticle immobilization, cell adhesion, and provided nanoparticle confinement for controlled linear release profiles of the nanocarrier and encapsulated cargo. To our knowledge, this is the first study to demonstrate the successful embedment of a translatable lipid based nanocarrier into a substrate that allows for temporal and spatial release of both hydrophobic and hydrophilic drugs. Specifically, we have utilized our platform to deliver chemotherapeutic drug Doxorubicin from PEM confined HALNPs. Overall, we believe the development of our HALNP embedded PEM system is significant and will catalyze the usage of substrate mediated delivery platforms in biomedical applications.
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Affiliation(s)
- Stephen L. Hayward
- Department of Chemical and Biomolecular Engineering, University of Nebraska-Lincoln, NE, 68588
| | - David M. Francis
- Department of Chemical and Biomolecular Engineering, University of Nebraska-Lincoln, NE, 68588
| | - Matthew J. Sis
- Department of Chemical and Biomolecular Engineering, University of Nebraska-Lincoln, NE, 68588
| | - Srivatsan Kidambi
- Department of Chemical and Biomolecular Engineering, University of Nebraska-Lincoln, NE, 68588
- Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, NE, 68588
- Mary and Dick Holland Regenerative Medicine Program, University of Nebraska Medical Center, NE, 68198
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89
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Sauter T, Geiger B, Kratz K, Lendlein A. Encasement of metallic cardiovascular stents with endothelial cell-selective copolyetheresterurethane microfibers. POLYM ADVAN TECHNOL 2015. [DOI: 10.1002/pat.3583] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Tilman Sauter
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies, Helmholtz-Zentrum Geesthacht; Kantstr. 55 14513 Teltow Germany
- Institute of Biochemistry and Biology, University of Potsdam; Karl-Liebknecht-Str. 24-25 14476 Potsdam Germany
| | - Brett Geiger
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies, Helmholtz-Zentrum Geesthacht; Kantstr. 55 14513 Teltow Germany
| | - Karl Kratz
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies, Helmholtz-Zentrum Geesthacht; Kantstr. 55 14513 Teltow Germany
| | - Andreas Lendlein
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies, Helmholtz-Zentrum Geesthacht; Kantstr. 55 14513 Teltow Germany
- Institute of Biochemistry and Biology, University of Potsdam; Karl-Liebknecht-Str. 24-25 14476 Potsdam Germany
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90
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Trant JF, McEachran MJ, Sran I, Turowec BA, de Bruyn JR, Gillies ER. Covalent Polyisobutylene-Paclitaxel Conjugates for Controlled Release from Potential Vascular Stent Coatings. ACS APPLIED MATERIALS & INTERFACES 2015; 7:14506-14517. [PMID: 26066902 DOI: 10.1021/acsami.5b04001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The development of covalent polyisobutylene (PIB)-paclitaxel (PTX) conjugates as a potential approach to controlling drug release from vascular stent coatings is described. PIB-PTX materials containing ∼24 and ∼48 wt % PTX, conjugated via ester linkages, were prepared. The PTX release profiles were compared with those of physical mixtures of PTX with carboxylic acid-functionalized PIB and with the triblock copolymer polystyrene-b-PIB-b-polystyrene (SIBS). Covalent conjugation led to significantly slower drug release. Atomic force microscopy imaging of coatings of the materials suggested that the physical mixtures exhibited multiple domains corresponding to phase separation, whereas the materials in which PTX was covalently conjugated appeared homogeneous. Coatings of the conjugated materials on stainless steel surfaces suffered less surface erosion than the physically mixed materials, remained intact, and adhered well to the surface throughout the thirty-five day study. Tensile testing and rheological studies suggested that the incorporation of PTX into the polymer introduces similar physical changes to the PIB as the incorporation of a glassy polystyrene block does in SIBS. Cytotoxicity assays showed that the coatings did not release toxic levels of PTX or other species into a cell culture medium over a 24 h period, yet the levels of PTX in the materials were sufficient to prevent C2C12 cells from adhering to and proliferating on them. Overall, these results indicate that covalent PIB-PTX conjugates have promise as coatings for vascular stents.
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Affiliation(s)
- John F Trant
- †Department of Chemistry, University of Western Ontario, 1151 Richmond Street, London N6A 5B7, Canada
| | - Matthew J McEachran
- †Department of Chemistry, University of Western Ontario, 1151 Richmond Street, London N6A 5B7, Canada
| | - Inderpreet Sran
- ‡Department of Chemical and Biochemical Engineering, The University of Western Ontario, 1151 Richmond Sreet, London N6A 5B9, Canada
| | - Bethany A Turowec
- §Biomedical Engineering Graduate Program, The University of Western Ontario, 1151 Richmond Street, London N6A 5B9, Canada
| | - John R de Bruyn
- ∥Department of Physics and Astronomy, The University of Western Ontario, 1151 Richmond Street, London N6A 5B7, Canada
| | - Elizabeth R Gillies
- †Department of Chemistry, University of Western Ontario, 1151 Richmond Street, London N6A 5B7, Canada
- ‡Department of Chemical and Biochemical Engineering, The University of Western Ontario, 1151 Richmond Sreet, London N6A 5B9, Canada
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91
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Chan JW, Zhang Y, Uhrich KE. Amphiphilic Macromolecule Self-Assembled Monolayers Suppress Smooth Muscle Cell Proliferation. Bioconjug Chem 2015; 26:1359-69. [PMID: 26042535 DOI: 10.1021/acs.bioconjchem.5b00208] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A significant limitation of cardiovascular stents is restenosis, where excessive smooth muscle cell (SMC) proliferation following stent implantation causes blood vessel reocclusion. While drug-eluting stents minimize SMC proliferation through releasing cytotoxic or immunosuppressive drugs from polymer carriers, significant issues remain with delayed healing, inflammation, and hypersensitivity reactions associated with drug and polymer coatings. Amphiphilic macromolecules (AMs) comprising a sugar-based hydrophobic domain and a hydrophilic poly(ethylene glycol) tail are noncytotoxic and recently demonstrated a concentration-dependent ability to suppress SMC proliferation. In this study, we designed a series of AMs and studied their coating properties (chemical composition, thickness, grafting density, and coating uniformity) to determine the effect of headgroup chemistry on bioactive AM grafting and release properties from stainless steel substrates. One carboxyl-terminated AM (1cM) and two phosphonate- (Me-1pM and Pr-1pM) terminated AMs, with varying linker lengths preceding the hydrophobic domain, were grafted to stainless steel substrates using the tethering by aggregation and growth (T-BAG) approach. The AMs formed headgroup-dependent, yet uniform, biocompatible adlayers. Pr-1pM and 1cM demonstrated higher grafting density and an extended release from the substrate over 21 days compared to Me-1pM, which exhibited lower grafting density and complete release within 7 days. Coinciding with their release profiles, Me-1pM and 1cM coatings initially suppressed SMC proliferation in vitro, but their efficacy decreased within 7 and 14 days, respectively, while Pr-1pM coatings suppressed SMC proliferation over 21 days. Thus, AMs with phosphonate headgroups and propyl linkers are capable of sustained release from the substrate and have the ability to suppress SMC proliferation during the restenosis that occurs in the 3-4 weeks after stent implantation, demonstrating the potential for AM coatings to provide sustained delivery via desorption from coated coronary stents and other metal-based implants.
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Affiliation(s)
- Jennifer W Chan
- †Department of Biomedical Engineering, Rutgers University, 599 Taylor Road, Piscataway, New Jersey 08854, United States
| | - Yingyue Zhang
- ‡Department of Chemistry and Chemical Biology, Rutgers University, 610 Taylor Road, Piscataway, New Jersey 08854, United States
| | - Kathryn E Uhrich
- †Department of Biomedical Engineering, Rutgers University, 599 Taylor Road, Piscataway, New Jersey 08854, United States.,‡Department of Chemistry and Chemical Biology, Rutgers University, 610 Taylor Road, Piscataway, New Jersey 08854, United States
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92
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Ren K, Zhang M, He J, Wu Y, Ni P. Preparation of Polymeric Prodrug Paclitaxel-Poly(lactic acid)-b-Polyisobutylene and Its Application in Coatings of a Drug Eluting Stent. ACS APPLIED MATERIALS & INTERFACES 2015; 7:11263-11271. [PMID: 25955234 DOI: 10.1021/acsami.5b01410] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
To develop a novel biodegradable and quite adhesive coating material for fabricating a paclitaxel (PTX)-containing eluting stent, herein, we report two kinds of drug eluting stent (DES) materials. One of them is a prodrug, PTX end-capped poly(lactic acid)-b-polyisobutylene (PTX-PLA-b-PIB) diblock copolymer, which possesses favorable biodegradability and biocompatibility. The other is a mixture of PIB-b-PLA diblock copolymer and PTX. PIB-b-PLA was synthesized via the ring-opening polymerization (ROP) using hydroxyl-terminated polyisobutylene (PIB-OH) as the initiator, while the PTX-PLA-b-PIB prodrug was prepared through a combination of ROP and Cu(I)-catalyzed azide-alkyne cycloaddition "click" reaction. The chemical structures and compositions as well as the molecular weights and molecular weight distributions of these copolymers have been fully characterized by (1)H nuclear magnetic resonance, Fourier transform infrared, and gel permeation chromatography measurements. The thermal degradation behavior and glass transition temperature (Tg) of the copolymers were studied by thermogravimetric analysis and differential scanning calorimetry, respectively. The solutions of PTX-PLA-b-PIB and the PIB-b-PLA/PTX mixture were separately coated onto the bare metal stents to form the PTX-containing DES. Subsequently, the surface structures and morphologies of the bare stent and DES were studied by atomic force microscopy and scanning electron microscopy, respectively. The in vitro release of PTX from these stents was conducted in a buffer medium (PBS 7.4) at 37 °C. The results showed that the coating formed by a blend of PTX-PLA-b-PIB, PIB-b-PLA, and PTX yielded a release that was better sustained than those of the individual PTX-PLA-b-PIB prodrug or PIB-b-PLA/PTX mixture. MTT assays demonstrated that the stent coated with PTX-PLA-b-PIB displayed a cytotoxicity lower than that of the PIB-b-PLA/PTX mixed layer, and the biocompatibility of coatings can be effectively improved by the prodrug.
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Affiliation(s)
- Kai Ren
- †College of Chemistry, Chemical Engineering and Materials Science, Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis, Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, Soochow University, Suzhou 215123, China
| | - Mingzu Zhang
- †College of Chemistry, Chemical Engineering and Materials Science, Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis, Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, Soochow University, Suzhou 215123, China
| | - Jinlin He
- †College of Chemistry, Chemical Engineering and Materials Science, Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis, Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, Soochow University, Suzhou 215123, China
| | - Yixian Wu
- ‡State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Peihong Ni
- †College of Chemistry, Chemical Engineering and Materials Science, Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis, Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, Soochow University, Suzhou 215123, China
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93
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In vitro study of sirolimus release from a drug-eluting stent: Comparison of the release profiles obtained using different test setups. Eur J Pharm Biopharm 2015; 93:328-38. [DOI: 10.1016/j.ejpb.2015.04.016] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Revised: 04/11/2015] [Accepted: 04/26/2015] [Indexed: 11/21/2022]
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94
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Park JK, Lee JH, Nah JW, Kim HK, Lim KS, Bae IH, Jeong MH, Unnithan AR, Cheol Sang Kim CSK, Park CH. Development of a novel drug-eluting stent consisting of an abluminal and luminal coating layer dual therapy system. RSC Adv 2015. [DOI: 10.1039/c5ra04270d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The aim of this study was to develop a dual drug-coated stent using a bi-directional coating system.
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Affiliation(s)
- Jun-Kyu Park
- Department of Polymer Science and Engineering
- Sunchon National University
- Sunchon
- Republic of Korea
- Bioalpha Co. Ltd
| | - Jung Ho Lee
- Bionanosystem Engineering Department
- Graduate School
- Chonbuk National University
- Jeonju 561-756
- Republic of Korea
| | - Jae-Woon Nah
- Department of Polymer Science and Engineering
- Sunchon National University
- Sunchon
- Republic of Korea
| | - Han Ki Kim
- Bioalpha Co. Ltd
- Seongnam
- Republic of Korea
| | - Kyung Seob Lim
- Cardiovascular Convergence Research Center
- Chonnam National University Hospital
- Gwangju
- Republic of Korea
| | - In-Ho Bae
- Cardiovascular Convergence Research Center
- Chonnam National University Hospital
- Gwangju
- Republic of Korea
| | - Myung Ho Jeong
- Cardiovascular Convergence Research Center
- Chonnam National University Hospital
- Gwangju
- Republic of Korea
| | - Afeesh Rajan Unnithan
- Bionanosystem Engineering Department
- Graduate School
- Chonbuk National University
- Jeonju 561-756
- Republic of Korea
| | | | - Chan-Hee Park
- Bionanosystem Engineering Department
- Graduate School
- Chonbuk National University
- Jeonju 561-756
- Republic of Korea
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95
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Nanomaterials Release from Nano-Enabled Products. THE HANDBOOK OF ENVIRONMENTAL CHEMISTRY 2015. [DOI: 10.1007/698_2015_409] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
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96
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Chang H, Zhang H, Hu M, Chen XC, Ren KF, Wang JL, Ji J. Surface modulation of complex stiffness via layer-by-layer assembly as a facile strategy for selective cell adhesion. Biomater Sci 2015. [DOI: 10.1039/c4bm00321g] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A facile approach to achieve selective cell adhesion by modulating surface complex stiffness based on layer-by-layer assembly is reported.
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Affiliation(s)
- Hao Chang
- Department of Polymer Science and Engineering Key Laboratory of Macromolecule Synthesis and Functionalization of the Ministry of Education
- Zhejiang University
- Hangzhou
- P.R. China
| | - He Zhang
- Department of Polymer Science and Engineering Key Laboratory of Macromolecule Synthesis and Functionalization of the Ministry of Education
- Zhejiang University
- Hangzhou
- P.R. China
| | - Mi Hu
- Department of Polymer Science and Engineering Key Laboratory of Macromolecule Synthesis and Functionalization of the Ministry of Education
- Zhejiang University
- Hangzhou
- P.R. China
| | - Xia-chao Chen
- Department of Polymer Science and Engineering Key Laboratory of Macromolecule Synthesis and Functionalization of the Ministry of Education
- Zhejiang University
- Hangzhou
- P.R. China
| | - Ke-feng Ren
- Department of Polymer Science and Engineering Key Laboratory of Macromolecule Synthesis and Functionalization of the Ministry of Education
- Zhejiang University
- Hangzhou
- P.R. China
| | - Jin-lei Wang
- Department of Polymer Science and Engineering Key Laboratory of Macromolecule Synthesis and Functionalization of the Ministry of Education
- Zhejiang University
- Hangzhou
- P.R. China
| | - Jian Ji
- Department of Polymer Science and Engineering Key Laboratory of Macromolecule Synthesis and Functionalization of the Ministry of Education
- Zhejiang University
- Hangzhou
- P.R. China
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97
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Kusmierczuk M, Nöchel U, Baudis S, Behl M, Kratz K, Lendlein A. Shape-Memory Polymer Networks Prepared from Star-Shaped Poly[(L-lactide)-co-glycolide] Precursors. ACTA ACUST UNITED AC 2014. [DOI: 10.1002/masy.201400150] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Maciej Kusmierczuk
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies; Helmholtz-Zentrum Geesthacht; Teltow Germany
| | - Ulrich Nöchel
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies; Helmholtz-Zentrum Geesthacht; Teltow Germany
| | - Stefan Baudis
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies; Helmholtz-Zentrum Geesthacht; Teltow Germany
| | - Marc Behl
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies; Helmholtz-Zentrum Geesthacht; Teltow Germany
| | - Karl Kratz
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies; Helmholtz-Zentrum Geesthacht; Teltow Germany
| | - Andreas Lendlein
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies; Helmholtz-Zentrum Geesthacht; Teltow Germany
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98
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A decade of modelling drug release from arterial stents. Math Biosci 2014; 257:80-90. [DOI: 10.1016/j.mbs.2014.06.016] [Citation(s) in RCA: 74] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Revised: 05/16/2014] [Accepted: 06/26/2014] [Indexed: 11/20/2022]
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99
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Abstract
The introduction of percutaneous coronary intervention (PCI) in the late 1970s revolutionized the management of stable and unstable coronary artery disease, providing an effective, quick, safe, and increasingly widely available method for coronary revascularization for many patients. Rapid development in this field led to the introduction of a number of new technologies, including intracoronary stents that have resulted in improved efficacy and long-term safety. In this manuscript we review the experience with the 2 major available classes of stents (bare metal [BMS], drug-eluting [DES]) and describe the delivery systems for these stents. An evidence review of the large trial data comparing balloon angioplasty, BMS, and DES demonstrates the incremental advances over time, with the latest generation of DES achieving the lowest rates of restenosis, stent thrombosis, and recurrent myocardial infarction. In addition, we provide an overview of the latest developments in stent technology, including the introduction of bioresorbable stents and new stent delivery systems. These latest advances are hoped to further improve outcomes while reducing costs due to a reduction in the need for future procedures and hospitalizations due to recurrent coronary disease.
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Affiliation(s)
- Sameer D Sheth
- Department of Medicine, Brigham and Women's Hospital, Boston, MA
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100
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Doro F, Ramos A, Schneider J, Rodrigues-Filho U, Veiga M, Yano C, Negreti A, Krieger M, Tfouni E. Deposition of organic−inorganic hybrid coatings over 316L surgical stainless steel and evaluation on vascular cells. CAN J CHEM 2014. [DOI: 10.1139/cjc-2014-0034] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Surface coating of metallic materials using the sol-gel technique is a suitable approach to obtain hybrid materials with improved properties for biomedical applications. In this study, an AISI 316L stainless steel surface was coated with ormosils prepared from tetraethylsiloxane and 3-glycidoxypropyltrimethoxysilane or polydimethylsiloxane. The characterization of structural and surface properties was performed by several techniques. Surface microstructure, morphology, and energy are dependent on organosilane type and content. Chemical stability of coatings was investigated by static immersion tests in phosphate buffer solution at 37 °C, and silicon leaching after 21 days was found to be in the range of ∼200−300 μg L−1. Mechanical adhesion was found to be within 1.0 and 3.7 N cm−1. The interaction of the samples and materials in the cardiovascular environment was investigated through cellular behavior. Biological assays were performed with slides to avoid any cytotoxic effects on human endothelial cells (HUVEC) and rabbit arterial smooth muscle cells (RASM). No significant alterations were observed after 24 h in the viability of RASM and HUVEC cells exposed to different coatings. No increase of HUVEC or RASM migration was observed after 24 h as evaluated by transwell migration assay. The hybrid materials showed suitable properties for potential application as biomaterials in cardiovascular environment as well as for incorporation of bioactive species with the aim to prepare drug-eluting stents.
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Affiliation(s)
- F.G. Doro
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto. Universidade de São Paulo, 14040-901, Ribeirão Preto, SP, Brazil
- Departamento de Química Geral e Inorgânica, Instituto de Química, Universidade Federal da Bahia, 40170-290, Salvador, BA, Brazil
| | - A.P. Ramos
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto. Universidade de São Paulo, 14040-901, Ribeirão Preto, SP, Brazil
| | - J.F. Schneider
- Instituto de Física de São Carlos, Universidade de São Paulo, São Carlos, Brazil
| | - U.P. Rodrigues-Filho
- Instituto de Química de São Carlos, Universidade de São Paulo, CP 780, 13563-120 São Carlos, SP, Brazil
| | - M.A.M.S. Veiga
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto. Universidade de São Paulo, 14040-901, Ribeirão Preto, SP, Brazil
| | - C.L. Yano
- Departamento de Fisiologia e Biofísica, Instituto de Biologia, Universidade Estadual de Campinas, UNICAMP, SP, Brazil
| | - A. Negreti
- Departamento de Fisiologia e Biofísica, Instituto de Biologia, Universidade Estadual de Campinas, UNICAMP, SP, Brazil
| | - M.H. Krieger
- Departamento de Fisiologia e Biofísica, Instituto de Biologia, Universidade Estadual de Campinas, UNICAMP, SP, Brazil
| | - E. Tfouni
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto. Universidade de São Paulo, 14040-901, Ribeirão Preto, SP, Brazil
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