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Zhang Y, Zhang Z, Liu Y, Cai D, Gu J, Sun D. Differential Mobility Spectrometry-Tandem Mass Spectrometry with Multiple Ion Monitoring Coupled with in Source-Collision Induced Dissociation: A New Strategy for the Quantitative Analysis of Pharmaceutical Polymer Excipients in Rat Plasma. Molecules 2023; 28:4782. [PMID: 37375337 DOI: 10.3390/molecules28124782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 06/05/2023] [Accepted: 06/12/2023] [Indexed: 06/29/2023] Open
Abstract
Polylactic acids (PLAs) are synthetic polymers composed of repeating lactic acid subunits. For their good biocompatibility, PLAs have been approved and widely applied as pharmaceutical excipients and scaffold materials. Liquid chromatography-tandem mass spectrometry is a powerful analytical tool not only for pharmaceutical ingredients but also for pharmaceutical excipients. However, the characterization of PLAs presents particular problems for mass spectrometry techniques. In addition to their high molecular weights and wide polydispersity, multiple charging and various adductions are intrinsic features of electrospray ionization. In the present study, a strategy combining of differential mobility spectrometry (DMS), multiple ion monitoring (MIM) and in-source collision-induced dissociation (in source-CID) has been developed and applied to the characterization and quantitation of PLAs in rat plasma. First, PLAs will be fragmented into characteristic fragment ions under high declustering potential in the ionization source. The specific fragment ions are then screened twice by quadrupoles to ensure a high signal intensity and low interference for mass spectrometry detection. Subsequently, DMS technique has been applied to further reduce the background noise. The appropriately chosen surrogate specific precursor ions could be utilized for the qualitative and quantitative analysis of PLAs, which provided results with the advantages of low endogenous interference, sufficient sensitivity and selectivity for bioassay. The linearity of the method was evaluated over the concentration range 3-100 μg/mL (r2 = 0.996) for PLA 20,000. The LC-DMS-MIM coupled with in source-CID strategy may contribute to the pharmaceutical studies of PLAs and the possible prospects of other pharmaceutical excipients.
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Affiliation(s)
- Yuyao Zhang
- Research Center for Drug Metabolism, School of Life Science, Jilin University, Changchun 130012, China
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China
| | - Zhi Zhang
- Research Center for Drug Metabolism, School of Life Science, Jilin University, Changchun 130012, China
| | - Yingze Liu
- Research Center for Drug Metabolism, School of Life Science, Jilin University, Changchun 130012, China
| | - Deqi Cai
- Research Center for Drug Metabolism, School of Life Science, Jilin University, Changchun 130012, China
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China
| | - Jingkai Gu
- Research Center for Drug Metabolism, School of Life Science, Jilin University, Changchun 130012, China
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China
| | - Dong Sun
- Research Center for Drug Metabolism, School of Life Science, Jilin University, Changchun 130012, China
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2
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Rizzarelli P, Rapisarda M. Matrix-Assisted Laser Desorption and Electrospray Ionization Tandem Mass Spectrometry of Microbial and Synthetic Biodegradable Polymers. Polymers (Basel) 2023; 15:polym15102356. [PMID: 37242931 DOI: 10.3390/polym15102356] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 05/10/2023] [Accepted: 05/16/2023] [Indexed: 05/28/2023] Open
Abstract
The in-depth structural and compositional investigation of biodegradable polymeric materials, neat or partly degraded, is crucial for their successful applications. Obviously, an exhaustive structural analysis of all synthetic macromolecules is essential in polymer chemistry to confirm the accomplishment of a preparation procedure, identify degradation products originating from side reactions, and monitor chemical-physical properties. Advanced mass spectrometry (MS) techniques have been increasingly applied in biodegradable polymer studies with a relevant role in their further development, valuation, and extension of application fields. However, single-stage MS is not always sufficient to identify unambiguously the polymer structure. Thus, tandem mass spectrometry (MS/MS) has more recently been employed for detailed structure characterization and in degradation and drug release monitoring of polymeric samples, among which are biodegradable polymers. This review aims to run through the investigations carried out by the soft ionization technique matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) and electrospray ionization mass spectrometry (ESI-MS) MS/MS in biodegradable polymers and present the resulting information.
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Affiliation(s)
- Paola Rizzarelli
- Institute for Polymers, Composites and Biomaterials, Consiglio Nazionale delle Ricerche (CNR), Via Paolo Gaifami 18, 95126 Catania, Italy
| | - Marco Rapisarda
- Institute for Polymers, Composites and Biomaterials, Consiglio Nazionale delle Ricerche (CNR), Via Paolo Gaifami 18, 95126 Catania, Italy
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3
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Tian R, Li K, Lin Y, Lu C, Duan X. Characterization Techniques of Polymer Aging: From Beginning to End. Chem Rev 2023; 123:3007-3088. [PMID: 36802560 DOI: 10.1021/acs.chemrev.2c00750] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Abstract
Polymers have been widely applied in various fields in the daily routines and the manufacturing. Despite the awareness of the aggressive and inevitable aging for the polymers, it still remains a challenge to choose an appropriate characterization strategy for evaluating the aging behaviors. The difficulties lie in the fact that the polymer features from the different aging stages require different characterization methods. In this review, we present an overview of the characterization strategies preferable for the initial, accelerated, and late stages during polymer aging. The optimum strategies have been discussed to characterize the generation of radicals, variation of functional groups, substantial chain scission, formation of low-molecular products, and deterioration in the polymers' macro-performances. In view of the advantages and the limitations of these characterization techniques, their utilization in a strategic approach is considered. In addition, we highlight the structure-property relationship for the aged polymers and provide available guidance for lifetime prediction. This review could allow the readers to be knowledgeable of the features for the polymers in the different aging stages and provide access to choose the optimum characterization techniques. We believe that this review will attract the communities dedicated to materials science and chemistry.
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Affiliation(s)
- Rui Tian
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Kaitao Li
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Yanjun Lin
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
- School of Chemical Engineering, Qinghai University, Xining 810016, China
| | - Chao Lu
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
- Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
| | - Xue Duan
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
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4
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Visan AI, Popescu-Pelin G, Socol G. Degradation Behavior of Polymers Used as Coating Materials for Drug Delivery-A Basic Review. Polymers (Basel) 2021; 13:1272. [PMID: 33919820 PMCID: PMC8070827 DOI: 10.3390/polym13081272] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Revised: 04/03/2021] [Accepted: 04/08/2021] [Indexed: 12/21/2022] Open
Abstract
The purpose of the work was to emphasize the main differences and similarities in the degradation mechanisms in the case of polymeric coatings compared with the bulk ones. Combined with the current background, this work reviews the properties of commonly utilized degradable polymers in drug delivery, the factors affecting degradation mechanism, testing methods while offering a retrospective on the evolution of the controlled release of biodegradable polymeric coatings. A literature survey on stability and degradation of different polymeric coatings, which were thoroughly evaluated by different techniques, e.g., polymer mass loss measurements, surface, structural and chemical analysis, was completed. Moreover, we analyzed some shortcomings of the degradation behavior of biopolymers in form of coatings and briefly proposed some solving directions to the main existing problems (e.g., improving measuring techniques resolution, elucidation of complete mathematical analysis of the different degradation mechanisms). Deep studies are still necessary on the dynamic changes which occur to biodegradable polymeric coatings which can help to envisage the future performance of synthesized films designed to be used as medical devices with application in drug delivery.
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Affiliation(s)
- Anita Ioana Visan
- Lasers Department, National Institute for Lasers, Plasma and Radiation Physics, 077190 Magurele, Ilfov, Romania;
| | | | - Gabriel Socol
- Lasers Department, National Institute for Lasers, Plasma and Radiation Physics, 077190 Magurele, Ilfov, Romania;
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Behrens AM, Kim J, Hotaling N, Seppala JE, Kofinas P, Tutak W. Rapid fabrication of poly(DL-lactide) nanofiber scaffolds with tunable degradation for tissue engineering applications by air-brushing. Biomed Mater 2016; 11:035001. [PMID: 27121660 PMCID: PMC4963247 DOI: 10.1088/1748-6041/11/3/035001] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Polymer nanofiber based materials have been widely investigated for use as tissue engineering scaffolds. While promising, these materials are typically fabricated through techniques that require significant time or cost. Here we report a rapid and cost effective air-brushing method for fabricating nanofiber scaffolds using a simple handheld apparatus, compressed air, and a polymer solution. Air-brushing also facilities control over the scaffold degradation rate without adversely impacting architecture. This was accomplished through a one step blending process of high (M w ≈ 100 000 g mol(-1)) and low (M w ≈ 25 000 g mol(-1)) molecular weight poly(DL-lactide) (PDLLA) polymers at various ratios (100:0, 70:30 and 50:50). Through this approach, we were able to control fiber scaffold degradation rate while maintaining similar fiber morphology, scaffold porosity, and bulk mechanical properties across all of the tested compositions. The impact of altered degradation rates was biologically evaluated in human bone marrow stromal cell (hBMSC) cultures for up to 16 days and demonstrated degradation rate dependence of both total DNA concentration and gene regulation.
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Affiliation(s)
- Adam M Behrens
- Fischell Department of Bioengineering, University of Maryland, 2330 Jeong H. Kim Engineering Building, College Park, MD, USA
| | - Jeffrey Kim
- Volpe Research Center ADA Foundation, 100 Bureau Dr, Gaithersburg, MD, USA
| | - Nathan Hotaling
- Biosystems and Biomaterials Division, National Institute of Standards and Technology, 100 Bureau Dr, Gaithersburg, MD, USA
| | - Jonathan E Seppala
- Materials Science and Engineering Division, National Institute of Standards and Technology, 100 Bureau Dr, Gaithersburg, MD, USA
| | - Peter Kofinas
- Fischell Department of Bioengineering, University of Maryland, 2330 Jeong H. Kim Engineering Building, College Park, MD, USA
| | - Wojtek Tutak
- Volpe Research Center ADA Foundation, 100 Bureau Dr, Gaithersburg, MD, USA
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6
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Time of flight secondary ion mass spectrometry surface and in-depth study of degradation of nanosheet poly(l-lactic acid) films. Biointerphases 2015; 10:019010. [DOI: 10.1116/1.4908206] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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7
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Rizzarelli P, Carroccio S. Modern mass spectrometry in the characterization and degradation of biodegradable polymers. Anal Chim Acta 2014; 808:18-43. [DOI: 10.1016/j.aca.2013.11.001] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2013] [Revised: 10/18/2013] [Accepted: 11/04/2013] [Indexed: 01/06/2023]
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8
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Nsouli B, Bejjani A, Negra SD, Gardon A, Thomas JP. Ion Beam Analysis and PD-MS As New Analytical Tools for Quality Control of Pharmaceuticals: Comparative Study from Fluphenazine in Solid Dosage Forms. Anal Chem 2010; 82:7309-18. [DOI: 10.1021/ac101247d] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Bilal Nsouli
- Lebanese Atomic Energy Commission—CNRS, Airport Road, PO Box 11-8281, Beirut, Lebanon, Institut de Physique Nucléaire de Lyon, Université Lyon 1, CNRS/IN2P3, 4 rue E. Fermi 69622 Villeurbanne Cedex, France, and Institut de Physique Nucléaire, CNRS-IN2P3, 91406 Orsay, France
| | - Alice Bejjani
- Lebanese Atomic Energy Commission—CNRS, Airport Road, PO Box 11-8281, Beirut, Lebanon, Institut de Physique Nucléaire de Lyon, Université Lyon 1, CNRS/IN2P3, 4 rue E. Fermi 69622 Villeurbanne Cedex, France, and Institut de Physique Nucléaire, CNRS-IN2P3, 91406 Orsay, France
| | - Serge Della Negra
- Lebanese Atomic Energy Commission—CNRS, Airport Road, PO Box 11-8281, Beirut, Lebanon, Institut de Physique Nucléaire de Lyon, Université Lyon 1, CNRS/IN2P3, 4 rue E. Fermi 69622 Villeurbanne Cedex, France, and Institut de Physique Nucléaire, CNRS-IN2P3, 91406 Orsay, France
| | - Alain Gardon
- Lebanese Atomic Energy Commission—CNRS, Airport Road, PO Box 11-8281, Beirut, Lebanon, Institut de Physique Nucléaire de Lyon, Université Lyon 1, CNRS/IN2P3, 4 rue E. Fermi 69622 Villeurbanne Cedex, France, and Institut de Physique Nucléaire, CNRS-IN2P3, 91406 Orsay, France
| | - Jean-Paul Thomas
- Lebanese Atomic Energy Commission—CNRS, Airport Road, PO Box 11-8281, Beirut, Lebanon, Institut de Physique Nucléaire de Lyon, Université Lyon 1, CNRS/IN2P3, 4 rue E. Fermi 69622 Villeurbanne Cedex, France, and Institut de Physique Nucléaire, CNRS-IN2P3, 91406 Orsay, France
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9
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Guilbaud JB, Baker H, Clark BC, Meehan E, Khimyak YZ. Effect of Encapsulating Arginine Containing Molecules on PLGA: A Solid-State NMR Study. J Pharm Sci 2010; 99:2697-710. [DOI: 10.1002/jps.22019] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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10
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Guilbaud JB, Clark BC, Meehan E, Hughes L, Saiani A, Khimyak YZ. Effect of Encapsulating a Pseudo-Decapeptide Containing Arginine on PLGA: A Solid-State NMR Study. J Pharm Sci 2010; 99:2681-96. [DOI: 10.1002/jps.22060] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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11
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Klerk LA, Dankers PYW, Popa ER, Bosman AW, Sanders ME, Reedquist KA, Heeren RMA. TOF-Secondary Ion Mass Spectrometry Imaging of Polymeric Scaffolds with Surrounding Tissue after in Vivo Implantation. Anal Chem 2010; 82:4337-43. [DOI: 10.1021/ac100837n] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Leendert A. Klerk
- FOM Institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands, Institute for Complex Molecular Systems, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands, Department of Pathology and Medical Biology, University Medical Center Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands, SupraPolix Research Center, Horsten 1, 5612 AX Eindhoven, The Netherlands, and Division of Clinical Immunology and Rheumatology, Academic Medical Center, University of Amsterdam
| | - Patricia Y. W. Dankers
- FOM Institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands, Institute for Complex Molecular Systems, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands, Department of Pathology and Medical Biology, University Medical Center Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands, SupraPolix Research Center, Horsten 1, 5612 AX Eindhoven, The Netherlands, and Division of Clinical Immunology and Rheumatology, Academic Medical Center, University of Amsterdam
| | - Eliane R. Popa
- FOM Institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands, Institute for Complex Molecular Systems, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands, Department of Pathology and Medical Biology, University Medical Center Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands, SupraPolix Research Center, Horsten 1, 5612 AX Eindhoven, The Netherlands, and Division of Clinical Immunology and Rheumatology, Academic Medical Center, University of Amsterdam
| | - Anton W. Bosman
- FOM Institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands, Institute for Complex Molecular Systems, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands, Department of Pathology and Medical Biology, University Medical Center Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands, SupraPolix Research Center, Horsten 1, 5612 AX Eindhoven, The Netherlands, and Division of Clinical Immunology and Rheumatology, Academic Medical Center, University of Amsterdam
| | - Marjolein E. Sanders
- FOM Institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands, Institute for Complex Molecular Systems, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands, Department of Pathology and Medical Biology, University Medical Center Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands, SupraPolix Research Center, Horsten 1, 5612 AX Eindhoven, The Netherlands, and Division of Clinical Immunology and Rheumatology, Academic Medical Center, University of Amsterdam
| | - Kris A. Reedquist
- FOM Institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands, Institute for Complex Molecular Systems, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands, Department of Pathology and Medical Biology, University Medical Center Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands, SupraPolix Research Center, Horsten 1, 5612 AX Eindhoven, The Netherlands, and Division of Clinical Immunology and Rheumatology, Academic Medical Center, University of Amsterdam
| | - Ron M. A. Heeren
- FOM Institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands, Institute for Complex Molecular Systems, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands, Department of Pathology and Medical Biology, University Medical Center Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands, SupraPolix Research Center, Horsten 1, 5612 AX Eindhoven, The Netherlands, and Division of Clinical Immunology and Rheumatology, Academic Medical Center, University of Amsterdam
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12
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Prestidge CA, Barnes TJ, Skinner W. Time-of-flight secondary-ion mass spectrometry for the surface characterization of solid-state pharmaceuticals. J Pharm Pharmacol 2010; 59:251-9. [PMID: 17270078 DOI: 10.1211/jpp.59.2.0011] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Abstract
Time-of-flight secondary-ion mass spectrometry (ToF-SIMS) is a highly surface sensitive analytical method for surface chemical identification and surface chemical distribution analysis (mapping). Here we have explored the application of ToF-SIMS for the characterization of solid-state pharmaceuticals and highlight specific case studies concerning the distribution and stability of pharmaceutical actives within solid matrices (pellets and polymeric carriers) and the face-specific properties of pharmaceutical crystals.
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Affiliation(s)
- Clive A Prestidge
- Ian Wark Research Institute, The Australian Research Council Special Research Centre for Particle and Material Interfaces, University of South Australia, Mawson Lakes, SA 5095, Australia.
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13
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Burns SA, Hard R, Hicks WL, Bright FV, Cohan D, Sigurdson L, Gardella JA. Determining the protein drug release characteristics and cell adhesion to a PLLA or PLGA biodegradable polymer membrane. J Biomed Mater Res A 2010; 94:27-37. [DOI: 10.1002/jbm.a.32654] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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14
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Burns SA, Gardella JA. Quantitative ToF-SIMS Studies of Protein Drug Release from Biodegradable Polymer Drug Delivery Membranes. APPLIED SURFACE SCIENCE 2008; 255:1170-1173. [PMID: 20016666 PMCID: PMC2678735 DOI: 10.1016/j.apsusc.2008.05.082] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Biodegradable polymers are of interest in developing strategies to control protein drug delivery. The protein that was used in this study is Keratinocyte Growth Factor (KGF) which is a protein involved in the re-epithelialization process. The protein is stabilized in the biodegradable polymer matrix during formulation and over the course of polymer degradation with the use of an ionic surfactant Aerosol-OT (AOT) which will encapsulate the protein in an aqueous environment. The release kinetics of the protein from the surface of these materials requires precise timing which is a crucial factor in the efficacy of this drug delivery system.Time of Flight Secondary Ion Mass Spectrometry (ToF-SIMS) was used in the same capacity to identify the molecular ion peak of the surfactant and polymer and use this to determine surface concentration. In the polymer matrix, the surfactant molecular ion peak was observed in the positive and negative mode at m/z 467 and 421, respectively. These peaks were determined to be [AOT + Na+] and [AOT-Na+]-. These methods are used to identify the surfactant and protein from the polymer matrix and are used to measure the rate of surface accumulation. The second step was to compare this accumulation rate with the release rate of the protein into an aqueous solution during the degradation of the biodegradable film. This rate is compared to that from fluorescence spectroscopy measurements using the protein autofluorescence from that released into aqueous solution.
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15
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Steves JM, Tan LT, Gardella JA, Hard R, Hicks WL, Cartwright AN, Koc B, Bright FV. Guest aggregation within poly(L-lactic acid)/pluronic P104 thin films. APPLIED SPECTROSCOPY 2008; 62:290-294. [PMID: 18339236 DOI: 10.1366/000370208783759605] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Rhodamine 6G (R6G) doped thin films composed of poly(L-lactic acid) (PLLA) and Pluronic P104 were spin cast onto glass microscope slides and characterized by ultraviolet-visible, steady-state, and time-resolved fluorescence spectroscopy. The results show that R6G aggregation within the film increases as the R6G concentration and P104 loading increases. These results suggest an approach for studying drug distributions (monomers, aggregates) within biodegradable polymer formulations.
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Affiliation(s)
- Jordan M Steves
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260, USA
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16
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Shen C, Guo S, Lu C. Degradation behaviors of monomethoxy poly(ethylene glycol)-b-poly(ɛ-caprolactone) nanoparticles in aqueous solution. POLYM ADVAN TECHNOL 2008. [DOI: 10.1002/pat.975] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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17
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Degradation behaviors of star-shaped poly(ethylene glycol)–poly(ɛ-caprolactone) nanoparticles in aqueous solution. Polym Degrad Stab 2007. [DOI: 10.1016/j.polymdegradstab.2007.06.012] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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18
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19
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Ha CS, Gardella JA. Surface Chemistry of Biodegradable Polymers for Drug Delivery Systems. Chem Rev 2005; 105:4205-32. [PMID: 16277374 DOI: 10.1021/cr040419y] [Citation(s) in RCA: 158] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Chang-Sik Ha
- Department of Polymer Science and Engineering, Pusan National University, Pusan 609-735, Korea
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20
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Current literature in mass spectrometry. JOURNAL OF MASS SPECTROMETRY : JMS 2003; 38:1290-1301. [PMID: 14696212 DOI: 10.1002/jms.415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
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21
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Current literature in mass spectrometry. JOURNAL OF MASS SPECTROMETRY : JMS 2003; 38:1215-1224. [PMID: 14648831 DOI: 10.1002/jms.414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
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