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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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3
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Alvarez-Lorenzo C, Concheiro A. From Drug Dosage Forms to Intelligent Drug-delivery Systems: a Change of Paradigm. SMART MATERIALS FOR DRUG DELIVERY 2013. [DOI: 10.1039/9781849736800-00001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The design of new drug-delivery systems (DDSs) able to regulate the moment and the rate at which the release should take place, and even to target the drug to specific tissues and cell compartments, has opened novel perspectives to improve the efficacy and safety of the therapeutic treatments. Ideally, the drug should only have access to its site of action and the release should follow the evolution of the disease or of certain biorhythms. The advances in the DDSs field are possible because of a better knowledge of the physiological functions and barriers to the drug access to the action site, but also due to the possibility of having “active” excipients that provide novel features. The joint work in a wide range of disciplines, comprising materials science, biomedical engineering and pharmaceutical technology, prompts the design and development of materials (lipids, polymers, hybrids) that can act as sensors of physiological parameters or external variables, and as actuators able to trigger or tune the release process. Such smart excipients lead to an advanced generation of DDSs designed as intelligent or stimuli-responsive. This chapter provides an overview of how the progress in DDSs is intimately linked to the evolution of the excipients, understood as a specific category of biomaterials. The phase transitions, the stimuli that can trigger them and the mechanisms behind the performance of the intelligent DDSs are analyzed as a whole, to serve as an introduction to the topics that are comprehensively discussed in the subsequent chapters of the book. A look to the future is also provided.
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Affiliation(s)
- C. Alvarez-Lorenzo
- Departamento de Farmacia y Tecnología Farmacéutica Facultad de Farmacia, Universidad de Santiago de Compostela, 15782-Santiago de Compostela Spain
| | - A. Concheiro
- Departamento de Farmacia y Tecnología Farmacéutica Facultad de Farmacia, Universidad de Santiago de Compostela, 15782-Santiago de Compostela Spain
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5
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San Juan A, Bala M, Hlawaty H, Portes P, Vranckx R, Feldman LJ, Letourneur D. Development of a Functionalized Polymer for Stent Coating in the Arterial Delivery of Small Interfering RNA. Biomacromolecules 2009; 10:3074-80. [DOI: 10.1021/bm900740g] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Aurélie San Juan
- Inserm, U698, Bio-ingénierie Cardiovasculaire, Université Paris 7, Paris, France, and Université Paris 13, Villetaneuse, France, Laboratoire d’Ingénierie des Matériaux et des Hautes Pressions (CNRS UPR 1311), Université Paris 13, Villetaneuse, France, and AP-HP, Hôpital Bichat, Département de Cardiologie, Paris, France
| | - Madiha Bala
- Inserm, U698, Bio-ingénierie Cardiovasculaire, Université Paris 7, Paris, France, and Université Paris 13, Villetaneuse, France, Laboratoire d’Ingénierie des Matériaux et des Hautes Pressions (CNRS UPR 1311), Université Paris 13, Villetaneuse, France, and AP-HP, Hôpital Bichat, Département de Cardiologie, Paris, France
| | - Hanna Hlawaty
- Inserm, U698, Bio-ingénierie Cardiovasculaire, Université Paris 7, Paris, France, and Université Paris 13, Villetaneuse, France, Laboratoire d’Ingénierie des Matériaux et des Hautes Pressions (CNRS UPR 1311), Université Paris 13, Villetaneuse, France, and AP-HP, Hôpital Bichat, Département de Cardiologie, Paris, France
| | - Patrick Portes
- Inserm, U698, Bio-ingénierie Cardiovasculaire, Université Paris 7, Paris, France, and Université Paris 13, Villetaneuse, France, Laboratoire d’Ingénierie des Matériaux et des Hautes Pressions (CNRS UPR 1311), Université Paris 13, Villetaneuse, France, and AP-HP, Hôpital Bichat, Département de Cardiologie, Paris, France
| | - Roger Vranckx
- Inserm, U698, Bio-ingénierie Cardiovasculaire, Université Paris 7, Paris, France, and Université Paris 13, Villetaneuse, France, Laboratoire d’Ingénierie des Matériaux et des Hautes Pressions (CNRS UPR 1311), Université Paris 13, Villetaneuse, France, and AP-HP, Hôpital Bichat, Département de Cardiologie, Paris, France
| | - Laurent J. Feldman
- Inserm, U698, Bio-ingénierie Cardiovasculaire, Université Paris 7, Paris, France, and Université Paris 13, Villetaneuse, France, Laboratoire d’Ingénierie des Matériaux et des Hautes Pressions (CNRS UPR 1311), Université Paris 13, Villetaneuse, France, and AP-HP, Hôpital Bichat, Département de Cardiologie, Paris, France
| | - Didier Letourneur
- Inserm, U698, Bio-ingénierie Cardiovasculaire, Université Paris 7, Paris, France, and Université Paris 13, Villetaneuse, France, Laboratoire d’Ingénierie des Matériaux et des Hautes Pressions (CNRS UPR 1311), Université Paris 13, Villetaneuse, France, and AP-HP, Hôpital Bichat, Département de Cardiologie, Paris, France
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6
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Okner R, Shaulov Y, Tal N, Favaro G, Domb AJ, Mandler D. Electropolymerized tricopolymer based on N-pyrrole derivatives as a primer coating for improving the performance of a drug-eluting stent. ACS APPLIED MATERIALS & INTERFACES 2009; 1:758-767. [PMID: 20356000 DOI: 10.1021/am800139s] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The coating of medical implants by polymeric films aims at increasing their biocompatibility as well as providing a durable matrix for the controlled release of a drug. In many cases, the coating is divided into a primer layer, which bridges between the medical implant and the drug-eluting matrix. The primer coating must be very carefully designed in order to provide optimal interactions with the surface of the medical implant and the outer layer. Here we present a simple and versatile approach for designing the primer layer based on electropolymerization of a carefully chosen blend of three different pyrrole derivatives: N-methylpyrrole (N-me), N-(2-carboxyethyl)pyrrole (PPA), and the butyl ester of N-(2-carboxyethyl)pyrrole (BuOPy). The composition and physical properties of the primer layer were studied in detail by atomic force microscopy (AFM) and a nano scratch tester. The latter provides the in-depth analysis of the adhesion and viscoelasticity of the coating. AFM phase imaging reveals a uniform distribution of the three monomers forming rough morphology. This primer layer significantly improved the morphology, stability, and paclitaxel release profile of a paclitaxel-eluting matrix based on methyl and lauryl methacrylates.
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Affiliation(s)
- Regina Okner
- Department of Inorganic and Analytical Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
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7
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Bakhshi R, Edirisinghe M, Darbyshire A, Ahmad Z, Seifalian A. Electrohydrodynamic Jetting Behaviour of Polyhedral Oligomeric Silsesquioxane Nanocomposite. J Biomater Appl 2008; 23:293-309. [DOI: 10.1177/0885328208089125] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In this paper, we investigate in detail the electrohydrodynamic spraying of a nonbiodegradable nanocomposite polyhedral oligomeric silsesquioxane polymer developed in our laboratories and currently being explored for coating metallic stent materials. Different concentrations of the polymer have been dissolved to prepare, characterise, and electrohydrodynamically deposit the polymer on stainless steel. From the experiments, the solution containing 15 wt% polymer was selected for further investigation. The variation of film/ coating thickness as a function of spraying time was studied and the structural features of the film were assessed using microscopy. Films were also tensile tested. This study has identified a process and conditions which can be used in our stent coating research.
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Affiliation(s)
- R. Bakhshi
- Department of Mechanical Engineering, University College London Torrington Place, London WC1E 7JE, UK, Biomaterials and Tissue Engineering Centre, Academic Division of Surgery and Interventional Sciences, University College London, Hampstead Campus London NW3 2PF, United Kingdom
| | - M.J. Edirisinghe
- Department of Mechanical Engineering, University College London Torrington Place, London WC1E 7JE, UK,
| | - A. Darbyshire
- Biomaterials and Tissue Engineering Centre, Academic Division of Surgery and Interventional Sciences, University College London, Hampstead Campus London NW3 2PF, United Kingdom
| | - Z. Ahmad
- Department of Mechanical Engineering, University College London Torrington Place, London WC1E 7JE, UK
| | - A.M. Seifalian
- Biomaterials and Tissue Engineering Centre, Academic Division of Surgery and Interventional Sciences, University College London, Hampstead Campus London NW3 2PF, United Kingdom
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