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Chaparro FJ, Presley KF, Coutinho da Silva MA, Mandan N, Colachis ML, Posner M, Arnold RM, Fan F, Moraes CR, Lannutti JJ. Sintered electrospun poly(ɛ‐caprolactone)–poly(ethylene terephthalate) for drug delivery. J Appl Polym Sci 2019. [DOI: 10.1002/app.47731] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Francisco J. Chaparro
- Department of Materials Science and EngineeringThe Ohio State University 2041 College Road, Columbus Ohio 43210
| | - Kayla F. Presley
- Department of Materials Science and EngineeringThe Ohio State University 2041 College Road, Columbus Ohio 43210
| | - Marco A. Coutinho da Silva
- Department of Veterinary Clinical SciencesThe Ohio State University 601 Vernon Tharp Street, Columbus Ohio 43210
| | - Nayan Mandan
- Department of Materials Science and EngineeringThe Ohio State University 2041 College Road, Columbus Ohio 43210
| | - Matthew L. Colachis
- Department of Materials Science and EngineeringThe Ohio State University 2041 College Road, Columbus Ohio 43210
| | - Michael Posner
- Department of Materials Science and EngineeringThe Ohio State University 2041 College Road, Columbus Ohio 43210
| | - Ryan M. Arnold
- Department of Materials Science and EngineeringThe Ohio State University 2041 College Road, Columbus Ohio 43210
| | - Fan Fan
- Department of Materials Science and EngineeringThe Ohio State University 2041 College Road, Columbus Ohio 43210
| | - Christa R. Moraes
- Department of Veterinary Clinical SciencesThe Ohio State University 601 Vernon Tharp Street, Columbus Ohio 43210
| | - John J. Lannutti
- Department of Materials Science and EngineeringThe Ohio State University 2041 College Road, Columbus Ohio 43210
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Chaparro FJ, Presley KF, Coutinho da Silva MA, Lannutti JJ. Sintered electrospun polycaprolactone for controlled model drug delivery. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 99:112-120. [PMID: 30889645 DOI: 10.1016/j.msec.2019.01.095] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Revised: 12/21/2018] [Accepted: 01/18/2019] [Indexed: 01/05/2023]
Abstract
Electrospinning has been used widely for drug delivery applications due to its versatility and ease of modification of spun fiber properties. Net drug loading and release is typically limited by the inherent surface-area of the sample. In a relatively novel approach, sintering of electrospun fiber was used to create a capsule favoring long-term delivery. We showed that electrospun polycaprolactone (PCL) retained its initial morphology out to 1042 days of in vitro exposure, illustrating its potential for extended performance. Sintering decreased the electrospun pore size by 10- and 28-fold following 56 and 57 °C exposures, respectively. At 58 and 59 °C, the PCL capsules lost all apparent surface porosity, but entrapped pores were observed in the 58 °C cross-section. The use of Rhodamine B (RhB, 479.02 g mol-1), Rose Bengal (RB, 1017.64 g mol-1) and albumin-fluorescein isothiocyanate conjugate from bovine serum (BSA-FITC, ~66,000 g mol-1) as model compounds demonstrated that release (RhB > RB ≫ BSA-FITC) is controlled both by molecular weight and available porosity. Interestingly, the ranking of release following sintering was 57 > 56 > 59 > 58 °C; COMSOL simulations explored the effects of capsule wall thickness and porosity on release rate. It was hypothesized that model drug adsorption on the available fiber surface-area (57 versus 56 °C) and entrapped porosity (59 versus 58 °C) could have also attributed to the observed ranking of release rates. While the 56 and 57 °C exposures allowed the bulk of the release to occur in <1 day, the capsules sintered at 58 and 59 °C exhibited release that continued after 12 days of exposure.
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Affiliation(s)
- Francisco J Chaparro
- Department of Materials Science and Engineering, The Ohio State University, 2041 College Road, Columbus, OH 43210, USA
| | - Kayla F Presley
- Department of Materials Science and Engineering, The Ohio State University, 2041 College Road, Columbus, OH 43210, USA
| | - Marco A Coutinho da Silva
- Department of Veterinary Clinical Sciences, The Ohio State University, 601 Vernon Tharp St., Columbus, OH 43210, USA
| | - John J Lannutti
- Department of Materials Science and Engineering, The Ohio State University, 2041 College Road, Columbus, OH 43210, USA.
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Marković D, Milovanović S, De Clerck K, Zizovic I, Stojanović D, Radetić M. Development of material with strong antimicrobial activity by high pressure CO2 impregnation of polyamide nanofibers with thymol. J CO2 UTIL 2018. [DOI: 10.1016/j.jcou.2018.04.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Munj HR, Lannutti JJ, Tomasko DL. Understanding Behavior of Polycaprolactone–Gelatin Blends under High Pressure CO2. POLYMER SCIENCE SERIES A 2017. [DOI: 10.1134/s0965545x17060086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Chen X, Salem HA, Zonoz R. CO2 SOLUBILITY AND DIFFUSIVITY AND RAPID GAS DECOMPRESSION RESISTANCE OF ELASTOMERS CONTAINING CNT. RUBBER CHEMISTRY AND TECHNOLOGY 2017. [DOI: 10.5254/rct.17.83726] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
ABSTRACT
Understanding the structure–property relationship of elastomers is of critical importance in developing next-generation elastomers for high-pressure, high-temperature (HPHT) applications and in extending the application temperature and pressure range of existing oilfield products. Gas dissolution and diffusion in elastomers are essential to understanding the relationship among elastomer structures, rapid gas decompression (RGD) resistance, and sealing performance. Solubility and diffusivity (or diffusion efficiency) of carbon dioxide (CO2) in hydrogenated nitrile butadiene rubber (HNBR) and fluoroelastomers (FKM) comprising carbon nanotubes (CNT) were measured using a gravimetric method. The Rubotherm method was also used to estimate the solubility and swelling of HNBR in both subcritical liquid and supercritical CO2. It was demonstrated that CNT had a direct impact on CO2 solubility, diffusion, and mechanical properties of elastomers, hence improving the RGD resistance of the elastomers.
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Affiliation(s)
- Xuming Chen
- Cameron, A Schlumberger Company, Houston, TX 77401
| | | | - Ray Zonoz
- Cameron, A Schlumberger Company, Houston, TX 77401
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Munj HR, Lannutti JJ, Tomasko DL. Understanding drug release from PCL/gelatin electrospun blends. J Biomater Appl 2016; 31:933-949. [DOI: 10.1177/0885328216673555] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Electrospinning is one of the efficient processes to fabricate polymeric fibrous scaffolds for several biomedical applications. Several studies have published to demonstrate drug release from electrospun scaffolds. Blends of natural and synthetic electrospun fibers provide excellent platform to combine mechanical and bioactive properties. Drug release from polymer blends is a complex process. Drug release from polymer can be dominated by one or more of following mechanisms: polymer erosion, relaxation, and degradation. In this study, electrospun polycaprolactone (PCL)–gelatin blends are investigated to understand release mechanism of Rhodamine B dye. Also, this article summarizes the effect of high-pressure carbon dioxide on drug loading and release from PCL–gelatin fibers. Results indicate that release media diffusion is a dominant mechanism for PCL–gelatin electrospun fibers. Thickness of electrospun mat becomes critical for blends with gelatin. As gelatin is highly soluble in water and has tendency of gelation, it affects diffusion of release media in and out of scaffold. This article is a key step forward in understanding release from electrospun blends.
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Affiliation(s)
- Hrishikesh R Munj
- Department of Chemical and Biomolecular Engineering, Ohio State University, Columbus, OH, USA
| | - John J Lannutti
- Materials Science and Engineering, Ohio State University, Columbus, OH, USA
| | - David L Tomasko
- Department of Chemical and Biomolecular Engineering, Ohio State University, Columbus, OH, USA
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Geiger BC, Nelson MT, Munj HR, Tomasko DL, Lannutti JJ. Dual drug release from CO2-infused nanofibers via hydrophobic and hydrophilic interactions. J Appl Polym Sci 2015. [DOI: 10.1002/app.42571] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Brett C. Geiger
- Department of Biomedical Engineering; The Ohio State University; Columbus Ohio 43210
| | - Mark Tyler Nelson
- Department of Biomedical Engineering; The Ohio State University; Columbus Ohio 43210
| | - Hrishikesh R. Munj
- William G. Lowrie Department of Chemical and Biomolecular Engineering; The Ohio State University; Columbus Ohio 43210
| | - David L. Tomasko
- William G. Lowrie Department of Chemical and Biomolecular Engineering; The Ohio State University; Columbus Ohio 43210
| | - John J. Lannutti
- Department of Materials Science and Engineering; The Ohio State University; Columbus Ohio 43210
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Munj HR, Nelson MT, Karandikar PS, Lannutti JJ, Tomasko DL. Biocompatible electrospun polymer blends for biomedical applications. J Biomed Mater Res B Appl Biomater 2014; 102:1517-27. [DOI: 10.1002/jbm.b.33132] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2013] [Revised: 01/26/2014] [Accepted: 02/18/2014] [Indexed: 11/09/2022]
Affiliation(s)
- Hrishikesh Ramesh Munj
- Department of Chemical and Biomolecular Engineering; Ohio State University; Columbus Ohio 43210
| | - M. Tyler Nelson
- Department of Biomedical Engineering; Ohio State University; Columbus Ohio 43210
| | | | | | - David Lane Tomasko
- Department of Chemical and Biomolecular Engineering; Ohio State University; Columbus Ohio 43210
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Nelson MT, Johnson J, Lannutti J. Media-based effects on the hydrolytic degradation and crystallization of electrospun synthetic-biologic blends. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2014; 25:297-309. [PMID: 24178985 DOI: 10.1007/s10856-013-5077-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2013] [Accepted: 10/20/2013] [Indexed: 06/02/2023]
Abstract
Tissue engineering scaffold degradation in aqueous environments is a widely recognized factor determining the fate of the associated anchorage-dependent cells. Electrospun blends of synthetic polycaprolactone (PCL) and a biological polymer, gelatin, of 25, 50, and 75 wt% were investigated for alterations in crystallinity, microstructure and morphology following widely used in vitro biological exposures. To our knowledge, the effects of these different aqueous-based biological media compositions on the degradation of these blends have never been directly compared. X-ray diffraction (XRD) analysis exposed that differences in PCL crystallinity were observed following exposures to phosphate buffered solution (PBS), Dulbecco's modified eagle medium (DMEM) cell culture media, and DI water following 7 days of exposure at 37 °C. XRD data suggested that in vitro medium exposures aid in providing chain mobility and rearrangement due to hydrolytic degradation of the gelatin phase, allowing previously constrained, poorly crystalline PCL regions to achieve more intense reflections resulting in the presence of crystalline peaks. The dry, as-spun modulus of relatively soft 100 % PCL fibers was approximately 10 % of any gelatin-containing composition. Tensile testing results indicate that hydrated gelatin containing scaffolds on average had a fivefold increase in elongation compared to as-spun scaffolds. After 24-h of aqueous exposure, the elastic modulus decreased in proportion to increasing gelatin content. After 1 day of exposure, the 75 and 100 % gelatin compositions largely ceased to display measurable values of modulus, elongation or tensile strength due to considerable hydrolytic degradation. On a relative basis, common aqueous in vitro medium exposures (deionized water, PBS, and DMEM) resulted in significantly divergent amounts of crystalline PCL, overall microstructure and fiber morphology in the blended compositions, subsequently 'shielding' scaffolds from significant changes in mechanical properties after 24-h of exposure. Understanding electrospun PCL-gelatin scaffold dynamics in different aqueous-based cell culture medias enables the ability to tailor scaffold composition to 'tune' degradation rate, microstructure, and long-term mechanical stability for optimal cellular growth, proliferation, and maturation.
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Affiliation(s)
- M Tyler Nelson
- Department of Biomedical Engineering, Ohio State University, Columbus, OH, 43210, USA
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Tang M, Purcell M, Steele JAM, Lee KY, McCullen S, Shakesheff KM, Bismarck A, Stevens MM, Howdle SM, Williams CK. Porous Copolymers of ε-Caprolactone as Scaffolds for Tissue Engineering. Macromolecules 2013. [DOI: 10.1021/ma401439z] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Min Tang
- Department
of Chemistry, Imperial College London, London SW7 2AZ, U.K
| | - Matthew Purcell
- School
of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, U.K
| | - Joseph A. M. Steele
- Department
of Materials, Department of Bioengineering, Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, U.K
| | - Koon-Yang Lee
- Polymer & Composite Engineering (PaCE) Group, Department of Chemical Engineering, Imperial College London, London SW7 2AZ, U.K
- Polymer & Composite Engineering (PaCE) Group, Institute of Materials Chemistry & Research, Faculty of Chemistry, University of Vienna, Währingerstr. 42, A-1090 Vienna, Austria
| | - Seth McCullen
- Department
of Materials, Department of Bioengineering, Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, U.K
| | - Kevin M. Shakesheff
- School of
Pharmacy, University of Nottingham, University Park, Nottingham NG7 2RD, U.K
| | - Alexander Bismarck
- Polymer & Composite Engineering (PaCE) Group, Department of Chemical Engineering, Imperial College London, London SW7 2AZ, U.K
- Polymer & Composite Engineering (PaCE) Group, Institute of Materials Chemistry & Research, Faculty of Chemistry, University of Vienna, Währingerstr. 42, A-1090 Vienna, Austria
| | - Molly M. Stevens
- Department
of Materials, Department of Bioengineering, Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, U.K
| | - Steven M. Howdle
- School
of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, U.K
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