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Abbasnezhad N, Zirak N, Champmartin S, Shirinbayan M, Bakir F. An Overview of In Vitro Drug Release Methods for Drug-Eluting Stents. Polymers (Basel) 2022; 14:2751. [PMID: 35808798 PMCID: PMC9269075 DOI: 10.3390/polym14132751] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 06/15/2022] [Accepted: 06/16/2022] [Indexed: 01/08/2023] Open
Abstract
The drug release profile of drug-eluting stents (DESs) is affected by a number of factors, including the formulation, design, and physicochemical properties of the utilized material. DES has been around for twenty years and despite its widespread clinical use, and efficacy in lowering the rate of target lesion restenosis, it still requires additional development to reduce side effects and provide long-term clinical stability. Unfortunately, for analyzing these implants, there is still no globally accepted in vitro test method. This is owing to the stent's complexity as well as the dynamic arterial compartments of the blood and vascular wall. The former is the source of numerous biological, chemical, and physical mechanisms that are more commonly observed in tissue, lumen, and DES. As a result, universalizing bio-relevant apparatus, suitable for liberation testing of such complex implants is difficult. This article aims to provide a comprehensive review of the methods used for in vitro release testing of DESs. Aspects related to the correlation of the release profiles in the cases of in vitro and in vivo are also addressed.
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Affiliation(s)
- Navideh Abbasnezhad
- Arts et Métiers Institute of Technology, CNAM, LIFSE, HESAM University, F-75013 Paris, France; (N.Z.); (S.C.)
- Arts et Métiers Institute of Technology, CNAM, PIMM, HESAM University, F-75013 Paris, France;
| | - Nader Zirak
- Arts et Métiers Institute of Technology, CNAM, LIFSE, HESAM University, F-75013 Paris, France; (N.Z.); (S.C.)
- Arts et Métiers Institute of Technology, CNAM, PIMM, HESAM University, F-75013 Paris, France;
| | - Stéphane Champmartin
- Arts et Métiers Institute of Technology, CNAM, LIFSE, HESAM University, F-75013 Paris, France; (N.Z.); (S.C.)
| | - Mohammadali Shirinbayan
- Arts et Métiers Institute of Technology, CNAM, PIMM, HESAM University, F-75013 Paris, France;
| | - Farid Bakir
- Arts et Métiers Institute of Technology, CNAM, LIFSE, HESAM University, F-75013 Paris, France; (N.Z.); (S.C.)
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2
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Ege ZR, Akan A, Oktar FN, Lin CC, Kuruca DS, Karademir B, Sahin YM, Erdemir G, Gunduz O. Indocyanine green based fluorescent polymeric nanoprobes for in vitro imaging. J Biomed Mater Res B Appl Biomater 2019; 108:538-554. [PMID: 31087780 DOI: 10.1002/jbm.b.34410] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Revised: 03/21/2019] [Accepted: 04/25/2019] [Indexed: 12/11/2022]
Abstract
Indocyanine green (ICG) provides an advantage in the imaging of deep tumors as it can reach deeper location without being absorbed in the upper layers of biological tissues in the wavelengths, which named "therapeutic window" in the tissue engineering. Unfortunately, rapid elimination and short-term stability in aqueous media limited its use as a fluorescence probe for the early detection of cancerous tissue. In this study, stabilization of ICG was performed by encapsulating ICG molecules into the biodegradable polymer composited with poly(l-lactic acid) and poly(ε-caprolactone) via a simple one-step multiaxial electrospinning method. Different types of coaxial and triaxial structure groups were performed and compared with single polymer only groups. Confocal microscopy was used to image the encapsulated ICG (1 mg/mL) within electrospun nanofibers and in vitro ICG uptake by MIA PaCa-2 pancreatic cancer cells. Stability of encapsulated ICG is demonstrated by the in vitro sustainable release profile in PBS (pH = 4 and 7) up to 21 days. These results suggest the potential of the ability of internalization and accommodation of ICG into the pancreatic cell cytoplasm from in vitro implanted ICG-encapsulated multiaxial nanofiber mats. ICG-encapsulated multilayer nanofibers may be promising for the local sustained delivery system to eliminate loss of dosage caused by direct injection of ICG-loaded nanoparticles in systemic administration.
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Affiliation(s)
- Zeynep R Ege
- Center for Nanotechnology and Biomaterials Applied & Research, Marmara University, Istanbul, Turkey
- Department of Biomedical Engineering, Institute of Science, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Aydin Akan
- Department of Biomedical Engineering, Faculty of Engineering and Architecture, Izmir Katip Celebi University, Izmir, Turkey
| | - Faik N Oktar
- Center for Nanotechnology and Biomaterials Applied & Research, Marmara University, Istanbul, Turkey
- Department of Bioengineering, Faculty of Engineering, Marmara University, Istanbul, Turkey
| | - Chi C Lin
- Department of Chemical and Materials Engineering, Tunghai University, Taichung, Taiwan
| | - Durdane S Kuruca
- Department of Physiology, Faculty of Medicine, University of Istanbul, Istanbul, Turkey
| | - Betul Karademir
- Department of Biochemistry, Faculty of Medicine, Marmara University, Istanbul, Turkey
| | - Yesim M Sahin
- Department of Biomedical Engineering, Faculty of Engineering and Architecture, Arel University, Istanbul, Turkey
| | - Gokce Erdemir
- Faculty of Medicine, Institute of Aziz Sancar Experimental Medicine Research, Istanbul University, Istanbul, Turkey
| | - Oguzhan Gunduz
- Center for Nanotechnology and Biomaterials Applied & Research, Marmara University, Istanbul, Turkey
- Department of Metallurgical and Materials Engineering, Faculty of Technology, Marmara University, Istanbul, Turkey
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3
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Rossi SM, Murray TE, Cassidy J, Lee MJ, Kelly HM. A Custom Radiopaque Thermoresponsive Chemotherapy-Loaded Hydrogel for Intratumoural Injection: An In Vitro and Ex Vivo Assessment of Imaging Characteristics and Material Properties. Cardiovasc Intervent Radiol 2018; 42:289-297. [PMID: 30390105 DOI: 10.1007/s00270-018-2103-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Accepted: 10/24/2018] [Indexed: 11/25/2022]
Abstract
PURPOSE Thermoresponsive hydrogels are gels which have different properties at varying temperatures. The objective of this study was to assess the material characteristics, imaging properties and chemotherapeutic drug release profile of a novel radiopaque thermoresponsive hydrogel in vitro, which is liquid at room temperature but solidifies at body temperature, to determine potential suitability for intratumoural delivery. MATERIALS AND METHODS An iodinated radiopaque thermoresponsive hydrogel was formulated using iodixanol at a range of concentrations and assessed for sol-gel transition, radiopacity and imaging using CT and US. A lead formulation containing iodixanol at a concentration of 9.22% weight by weight (w/w, g of iodixanol per g of hydrogel) was evaluated in vitro for injectability, disintegration and dual drug release of cisplatin and paclitaxel from the hydrogel formulation. RESULTS Radiopacity of the hydrogel increased in a concentration-dependent manner, but the highest concentration of iodixanol evaluated in this study (13.83% w/w) adversely affected the sol-gel transition of the hydrogel; therefore, 9.22% w/w iodixanol hydrogel was identified as the lead formulation. This formulation was readily visible on both CT and US. The formulation was hand injectable through a range of clinically relevant devices, had a sustained disintegration profile for up to 28 days and was able to deliver a sustained release of chemotherapeutic drug for up to 10 days. CONCLUSIONS Favourable in vitro and ex vivo imaging and material characteristics of this thermoresponsive gel are demonstrated, suggesting potential interventional oncology applications for image-guided intratumoural delivery of sustained-release chemotherapy.
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Affiliation(s)
- Seóna M Rossi
- School of Pharmacy, Royal College of Surgeons in Ireland (RCSI), 123 St. Stephen's Green, Dublin 2, Ireland.,Tissue Engineering Research Group, Department of Anatomy, Royal College of Surgeons in Ireland, 123 St. Stephen's Green, Dublin 2, Ireland
| | | | - John Cassidy
- School of Chemical and Pharmaceutical Sciences, Dublin Institute of Technology, Dublin 2, Ireland
| | - Michael J Lee
- Department of Radiology, Beaumont Hospital, Dublin 9, Ireland
| | - Helena M Kelly
- School of Pharmacy, Royal College of Surgeons in Ireland (RCSI), 123 St. Stephen's Green, Dublin 2, Ireland. .,Tissue Engineering Research Group, Department of Anatomy, Royal College of Surgeons in Ireland, 123 St. Stephen's Green, Dublin 2, Ireland.
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4
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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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McNamara MC, Sharifi F, Wrede AH, Kimlinger DF, Thomas DG, Vander Wiel JB, Chen Y, Montazami R, Hashemi NN. Microfibers as Physiologically Relevant Platforms for Creation of 3D Cell Cultures. Macromol Biosci 2017; 17. [PMID: 29148617 DOI: 10.1002/mabi.201700279] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Revised: 09/15/2017] [Indexed: 12/28/2022]
Abstract
Microfibers have received much attention due to their promise for creating flexible and highly relevant tissue models for use in biomedical applications such as 3D cell culture, tissue modeling, and clinical treatments. A generated tissue or implanted material should mimic the natural microenvironment in terms of structural and mechanical properties as well as cell adhesion, differentiation, and growth rate. Therefore, the mechanical and biological properties of the fibers are of importance. This paper briefly introduces common fiber fabrication approaches, provides examples of polymers used in biomedical applications, and then reviews the methods applied to modify the mechanical and biological properties of fibers fabricated using different approaches for creating a highly controlled microenvironment for cell culturing. It is shown that microfibers are a highly tunable and versatile tool with great promise for creating 3D cell cultures with specific properties.
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Affiliation(s)
- Marilyn C McNamara
- Department of Mechanical Engineering, Iowa State University, Ames, IA, 50011, USA
| | - Farrokh Sharifi
- Department of Mechanical Engineering, Iowa State University, Ames, IA, 50011, USA
| | - Alex H Wrede
- Department of Mechanical Engineering, Iowa State University, Ames, IA, 50011, USA
| | - Daniel F Kimlinger
- Department of Mechanical Engineering, Iowa State University, Ames, IA, 50011, USA
| | - Deepak-George Thomas
- Department of Mechanical Engineering, Iowa State University, Ames, IA, 50011, USA
| | | | - Yuanfen Chen
- Department of Mechanical Engineering, Iowa State University, Ames, IA, 50011, USA
| | - Reza Montazami
- Department of Mechanical Engineering, Iowa State University, Ames, IA, 50011, USA.,Center of Advanced Host Defense Immunobiotics and Translational Medicine, Iowa State University, Ames, IA, 50011, USA
| | - Nicole N Hashemi
- Department of Mechanical Engineering, Iowa State University, Ames, IA, 50011, USA.,Center of Advanced Host Defense Immunobiotics and Translational Medicine, Iowa State University, Ames, IA, 50011, USA
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7
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Drug deposition in coronary arteries with overlapping drug-eluting stents. J Control Release 2016; 238:1-9. [PMID: 27432751 DOI: 10.1016/j.jconrel.2016.07.023] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Revised: 07/13/2016] [Accepted: 07/14/2016] [Indexed: 01/20/2023]
Abstract
Drug-eluting stents are accepted as mainstream endovascular therapy, yet concerns for their safety may be under-appreciated. While failure from restenosis has dropped to below 5%, the risk of stent thrombosis and associated mortality remain relatively high. Further optimization of drug release is required to minimize thrombosis risk while maintaining therapeutic dose. The complex three-dimensional geometry of deployed stents together with the combination of diffusive and advective drug transport render an intuitive understanding of the situation exceedingly difficult. In situations such as this, computational modeling has proven essential, helping define the limits of efficacy, determine the mode and mechanism of drug release, and identify alternatives to avoid toxicity. A particularly challenging conformation is encountered in coronary arteries with overlapping stents. To study hemodynamics and drug deposition in such vessels we combined high-resolution, multi-scale ex vivo computed tomography with a flow and mass transfer computational model. This approach ensures high geometric fidelity and precise, simultaneous calculation of blood flow velocity, shear stress and drug distribution. Our calculations show that drug uptake by the arterial tissue is dependent both on the patterns of flow disruption near the wall, as well as on the relative positioning of drug-eluting struts. Overlapping stent struts lead to localized peaks of drug concentration that may increase the risk of thrombosis. Such peaks could be avoided by anisotropic stent structure or asymmetric drug release designed to yield homogeneous drug distribution along the coronary artery and, at the least, suggest that these issues need to remain in the forefront of consideration in clinical practice.
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Sharifi F, Kurteshi D, Hashemi N. Designing highly structured polycaprolactone fibers using microfluidics. J Mech Behav Biomed Mater 2016; 61:530-540. [PMID: 27136089 DOI: 10.1016/j.jmbbm.2016.04.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Revised: 04/02/2016] [Accepted: 04/05/2016] [Indexed: 11/17/2022]
Abstract
Microfibers are becoming increasingly important for biomedical applications such as regenerative medicine and tissue engineering. We have used a microfluidic approach to create polycaprolactone (PCL) microfibers in a controlled manner. Through the variations of the sheath fluid flow rate and PCL concentration in the core solution, the morphology of the microfibers and their cross-sections can be tuned. The microfibers were made using PCL concentrations of 2%, 5%, and 8% in the core fluid with a wide range of sheath-to-core flow rate ratios from 120:5µL/min to 10:5µL/min, respectively. The results revealed that the mechanical properties of the PCL microfibers made using microfluidic approach were significantly improved compared to the PCL microfibers made by other fiber fabrication methods. Additionally, it was demonstrated that by decreasing the flow rate ratio and increasing the PCL concentration, the size of the microfiber could be increased. Varying the sheath-to-core flow rate ratios from 40:5 to 10:5, the tensile stress at break, the tensile strain at break, and the Young׳s modulus were enhanced from 24.51MPa to 77.07MPa, 567% to 1420%, and 247.25MPa to 539.70MPa, respectively. The porosity and roughness of microfiber decreased when the PCL concentration increased from 2% to 8%, whereas changing the flow rate ratio did not have considerable impact on the microfiber roughness.
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Affiliation(s)
- Farrokh Sharifi
- Department of Mechanical Engineering, Iowa State University, Ames, IA 50011, USA
| | - Diamant Kurteshi
- Department of Mechanical Engineering, Iowa State University, Ames, IA 50011, USA
| | - Nastaran Hashemi
- Department of Mechanical Engineering, Iowa State University, Ames, IA 50011, USA; Center for Advanced Host Defense Immunobiotics and Translational Comparative Medicine, Iowa State University, Ames, IA 50011, USA.
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9
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Elsner JJ, Kraitzer A, Grinberg O, Zilberman M. Highly porous drug-eluting structures: from wound dressings to stents and scaffolds for tissue regeneration. BIOMATTER 2014; 2:239-70. [PMID: 23507890 PMCID: PMC3568110 DOI: 10.4161/biom.22838] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
For many biomedical applications, there is need for porous implant materials. The current article focuses on a method for preparation of drug-eluting porous structures for various biomedical applications, based on freeze drying of inverted emulsions. This fabrication process enables the incorporation of any drug, to obtain an "active implant" that releases drugs to the surrounding tissue in a controlled desired manner. Examples for porous implants based on this technique are antibiotic-eluting mesh/matrix structures used for wound healing applications, antiproliferative drug-eluting composite fibers for stent applications and local cancer treatment, and protein-eluting films for tissue regeneration applications. In the current review we focus on these systems. We show that the release profiles of both types of drugs, water-soluble and water-insoluble, are affected by the emulsion's formulation parameters. The former's release profile is affected mainly through the emulsion stability and the resulting porous microstructure, whereas the latter's release mechanism occurs via water uptake and degradation of the host polymer. Hence, appropriate selection of the formulation parameters enables to obtain desired controllable release profile of any bioactive agent, water-soluble or water-insoluble, and also fit its physical properties to the application.
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Affiliation(s)
- Jonathan J Elsner
- Department of Biomedical Engineering, Tel-Aviv University, Tel-Aviv, Israel
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Tan H, Wang Z, Li J, Pan Z, Ding M, Fu Q. An Approach for the Sphere-to-Rod Transition of Multiblock Copolymer Micelles. ACS Macro Lett 2013; 2:146-151. [PMID: 35581777 DOI: 10.1021/mz3005583] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The shape of polymer micelles is important for pharmaceutical applications as drug delivery. In this article, an approach inducing sphere-to-rod transition of multiblock polyurethane micelles has been developed through introducing a second hydrophilic component phosphatidylcholine group into the polymer chains. Time-resolved dynamic light scattering (DLS), combined with transmission electron microscopy (TEM), was employed to investigate the kinetics of morphology transition. Moreover, a dissipative particle dynamics (DPD) simulation method was applied to study the mechanism of sphere-to-rod transition. These experimental and simulation studies revealed that the hydrophilic phosphatidylcholine groups can create defects on the surfaces of spherical polyurethane micelles, thus, making positive contribution to adhesive collisions and leading to the fusion of spherical micelles into rod-like micelles. This finding provides new insight into the origins of rod-like polymer micelles, which is valuable for the design and preparation of novel polymeric drug carriers with tailored properties.
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Affiliation(s)
- Hong Tan
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Zhigao Wang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Jiehua Li
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Zhicheng Pan
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Mingming Ding
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Qiang Fu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
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11
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Bajpai S, Das P, Sharma L. Investigation of Dynamic Release of Antibiotic Drug Gentamicin Sulphate from Cotton Cellulose/Polyacrylic Acid Composite Fibers. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2012. [DOI: 10.1080/10601325.2013.735968] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- S.K. Bajpai
- a Polymer Research Laboratory, Department of Chemistry , Govt. Model Science College , Jabalpur , (M.P) , India
| | - P. Das
- b Department of Chemistry , Smt. C.H.M. College, Ulhasnagar , Mumbai , (Maharashtra) , India
| | - L. Sharma
- a Polymer Research Laboratory, Department of Chemistry , Govt. Model Science College , Jabalpur , (M.P) , India
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12
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Kraitzer A, Alperstein D, Kloog Y, Zilberman M. Mechanisms of antiproliferative drug release from bioresorbable porous structures. J Biomed Mater Res A 2012; 101:1302-10. [DOI: 10.1002/jbm.a.34436] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2012] [Revised: 07/26/2012] [Accepted: 08/31/2012] [Indexed: 11/11/2022]
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Lin YS, Huang KS, Yang CH, Wang CY, Yang YS, Hsu HC, Liao YJ, Tsai CW. Microfluidic synthesis of microfibers for magnetic-responsive controlled drug release and cell culture. PLoS One 2012; 7:e33184. [PMID: 22470443 PMCID: PMC3314645 DOI: 10.1371/journal.pone.0033184] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2011] [Accepted: 02/06/2012] [Indexed: 11/18/2022] Open
Abstract
This study demonstrated the fabrication of alginate microfibers using a modular microfluidic system for magnetic-responsive controlled drug release and cell culture. A novel two-dimensional fluid-focusing technique with multi-inlets and junctions was used to spatiotemporally control the continuous laminar flow of alginate solutions. The diameter of the manufactured microfibers, which ranged from 211 µm to 364 µm, could be well controlled by changing the flow rate of the continuous phase. While the model drug, diclofenac, was encapsulated into microfibers, the drug release profile exhibited the characteristic of a proper and steady release. Furthermore, the diclofenac release kinetics from the magnetic iron oxide-loaded microfibers could be controlled externally, allowing for a rapid drug release by applying a magnetic force. In addition, the successful culture of glioblastoma multiforme cells in the microfibers demonstrated a good structural integrity and environment to grow cells that could be applied in drug screening for targeting cancer cells. The proposed microfluidic system has the advantages of ease of fabrication, simplicity, and a fast and low-cost process that is capable of generating functional microfibers with the potential for biomedical applications, such as drug controlled release and cell culture.
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Affiliation(s)
- Yung-Sheng Lin
- Department of Applied Cosmetology and Master Program of Cosmetic Science, Hungkuang University, Taichung, Taiwan
| | - Keng-Shiang Huang
- School of Chinese Medicine for Post-Baccalaureate, I-Shou University, Kaohsiung, Taiwan
- * E-mail: (K-SH); (C-HY)
| | - Chih-Hui Yang
- Department of Biological Science and Technology, I-Shou University, Kaohsiung, Taiwan
- * E-mail: (K-SH); (C-HY)
| | - Chih-Yu Wang
- Department of Biomedical Engineering, I-Shou University, Kaohsiung, Taiwan
| | - Yuh-Shyong Yang
- Department of Biological Science and Technology, National Chiao Tung University, Hsinchu, Taiwan
| | - Hsiang-Chen Hsu
- Department of Mechanical and Automation Engineering, I-Shou University, Kaohsiung, Taiwan
| | - Yu-Ju Liao
- Department of Applied Cosmetology and Master Program of Cosmetic Science, Hungkuang University, Taichung, Taiwan
| | - Chia-Wen Tsai
- Department of Information Management, Ming Chuan University, Taipei, Taiwan
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Lee CH, Chen CJ, Liu SJ, Hsiao CY, Chen JK. The Development of Novel Biodegradable Bifurcation Stents for the Sustainable Release of Anti-Proliferative Sirolimus. Ann Biomed Eng 2012; 40:1961-70. [DOI: 10.1007/s10439-012-0556-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2012] [Accepted: 03/21/2012] [Indexed: 12/18/2022]
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15
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Guo XD, Zhang LJ, Qian Y. Systematic Multiscale Method for Studying the Structure–Performance Relationship of Drug-Delivery Systems. Ind Eng Chem Res 2012. [DOI: 10.1021/ie2014668] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xin Dong Guo
- School of
Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640,
P.R. China
| | - Li Juan Zhang
- School of
Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640,
P.R. China
| | - Yu Qian
- School of
Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640,
P.R. China
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Novel nanocomposite stent coating releasing resveratrol and quercetin reduces neointimal hyperplasia and promotes re-endothelialization. J Control Release 2012; 159:27-33. [PMID: 22269665 DOI: 10.1016/j.jconrel.2012.01.008] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2011] [Revised: 01/04/2012] [Accepted: 01/10/2012] [Indexed: 11/21/2022]
Abstract
Late-term thrombosis associated with drug-eluting stents may be due to the non-selective actions of antimitogenic drugs on endothelial cells, leading to delayed vascular healing after stenting angioplasty. Currently, there is a need for stent-based therapies that can both attenuate neointimal hyperplasia and promote re-endothelialization. The aim of this study was to compare the effects of a resveratrol (R)- and quercetin (Q)-eluting stent with that of a bare metal stent (BMS) on neointimal hyperplasia and re-endothelialization in a rat model of arterial angioplasty and stenting. Miniature stents (2.5×1.25mm) were sprayed with nanocomposite coatings containing two concentrations of R:Q (50:25μg/cm(2) (RQ1) or 150:75μg/cm(2) (RQ2)). The stents were deployed into the common carotid artery of rats and their impact on vascular remodeling was compared to that of BMS. Luminal stenosis in arteries stented with RQ2-eluting stents was reduced by 64.6% (p<0.05) compared to arteries stented with BMS. Accompanying this effect was a 59.8% reduction in macrophage infiltration (p<0.05). There were no differences found between RQ1 and BMS. Finally, the RQ2-coated stent accelerated re-endothelialization by 50% compared with BMS (p<0.05). Thus, compared with BMS, local delivery of R and Q from a stent platform significantly reduced in-stent stenosis, while promoting re-endothelialization. These data suggest that R and Q may be favorable candidates for novel stent coatings, potentially reducing the risk of late thrombosis associated with drug-eluting stents.
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In-vitro release of anti-proliferative paclitaxel from novel balloon-expandable polycaprolactone stents. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2011. [DOI: 10.1016/j.msec.2011.04.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Nie S, Hsiao WLW, Pan W, Yang Z. Thermoreversible Pluronic F127-based hydrogel containing liposomes for the controlled delivery of paclitaxel: in vitro drug release, cell cytotoxicity, and uptake studies. Int J Nanomedicine 2011; 6:151-66. [PMID: 21499415 PMCID: PMC3075891 DOI: 10.2147/ijn.s15057] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
Purpose To develop an in situ gel system comprising liposome-containing paclitaxel (PTX) dispersed within the thermoreversible gel (Pluronic® F127 gel) for controlled release and improved antitumor drug efficiency. Methods The dialysis membrane and membrane-less diffusion method were used to investigate the in vitro drug release behavior. Differential scanning calorimetry (DSC) thermal analysis was used to investigate the “micellization” and “sol/gel transition” process of in situ gel systems. In vitro cytotoxicity and drug uptake in KB cancer cells were determined by MTT, intercellular drug concentration, and fluorescence intensity assay. Results The in vitro release experiment performed with a dialysis membrane model showed that the liposomal gel exhibited the longest drug-release period compared with liposome, general gel, and commercial formulation Taxol®. This effect is presumably due to the increased viscosity of liposomal gel, which has the effect of creating a drug reservoir. Both drug and gel release from the in situ gel system operated under zero-order kinetics and showed a correlation of release of PTX with gel, indicating a predominating release mechanism of the erosion type. Dispersing liposomes into the gel replaced larger gel itself for achieving the same gel dissolution rate. Both the critical micelle temperature and the sol/gel temperature, detected by DSC thermal analysis, were shifted to lower temperatures by adding liposomes. The extent of the shifts depended on the amount of embedded liposomes. MTT assay and drug uptake studies showed that the treatment with PTX-loaded liposomal 18% Pluronic F127 yielded cytotoxicities, intercellular fluorescence intensity, and drug concentration in KB cells much higher than that of conventional liposome, while blank liposomal 18% Pluronic F127 gel was far less than the Cremophor EL® vehicle and empty liposomes. Conclusions A thermosensitive hydrogel with embedded liposome is a promising carrier for hydrophobic anticancer agents, to be used in parenteral formulations for treating local cancers.
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Affiliation(s)
- Shufang Nie
- Department of Pharmaceutical Engineering, Wuhan Bioengineering Institute, Yangluo Economic Development Zone, Wuhan, People's Republic of China
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Kraitzer A, Kloog Y, Haklai R, Zilberman M. Composite Fiber Structures with Antiproliferative Agents Exhibit Advantageous Drug Delivery and Cell Growth Inhibition In Vitro. J Pharm Sci 2011; 100:133-49. [DOI: 10.1002/jps.22238] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2009] [Revised: 03/15/2010] [Accepted: 04/22/2010] [Indexed: 11/08/2022]
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Manju S, Sharma CP, Sreenivasan K. Targeted coadministration of sparingly soluble paclitaxel and curcumin into cancer cells by surface engineered magnetic nanoparticles. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm12528a] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Chakraborty S, Liao IC, Adler A, Leong KW. Electrohydrodynamics: A facile technique to fabricate drug delivery systems. Adv Drug Deliv Rev 2009; 61:1043-54. [PMID: 19651167 DOI: 10.1016/j.addr.2009.07.013] [Citation(s) in RCA: 308] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2009] [Accepted: 07/16/2009] [Indexed: 10/20/2022]
Abstract
Electrospinning and electrospraying are facile electrohydrodynamic fabrication methods that can generate drug delivery systems (DDS) through a one-step process. The nanostructured fiber and particle morphologies produced by these techniques offer tunable release kinetics applicable to diverse biomedical applications. Coaxial electrospinning/electrospraying, a relatively new technique of fabricating core-shell fibers/particles have added to the versatility of these DDS by affording a near zero-order drug release kinetics, dampening of burst release, and applicability to a wider range of bioactive agents. Controllable electrospinning/spraying of fibers and particles and subsequent drug release from these chiefly polymeric vehicles depends on well-defined solution and process parameters. The additional drug delivery capability from electrospun fibers can further enhance the material's functionality in tissue engineering applications. This review discusses the state-of-the-art of using electrohydrodynamic technique to generate nanofiber/particles as drug delivery devices.
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Kraitzer A, Kloog Y, Zilberman M. Novel farnesylthiosalicylate (FTS)-eluting composite structures. Eur J Pharm Sci 2009; 37:351-62. [DOI: 10.1016/j.ejps.2009.03.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2008] [Revised: 02/19/2009] [Accepted: 03/09/2009] [Indexed: 10/21/2022]
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