101
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Tonglairoum P, Ngawhirunpat T, Rojanarata T, Panomsuk S, Kaomongkolgit R, Opanasopit P. Fabrication of mucoadhesive chitosan coated polyvinylpyrrolidone/cyclodextrin/clotrimazole sandwich patches for oral candidiasis. Carbohydr Polym 2015; 132:173-9. [DOI: 10.1016/j.carbpol.2015.06.032] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2015] [Revised: 06/08/2015] [Accepted: 06/10/2015] [Indexed: 11/26/2022]
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102
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Mohiti-Asli M, Saha S, Murphy SV, Gracz H, Pourdeyhimi B, Atala A, Loboa EG. Ibuprofen loaded PLA nanofibrous scaffolds increase proliferation of human skin cells in vitro and promote healing of full thickness incision wounds in vivo. J Biomed Mater Res B Appl Biomater 2015; 105:327-339. [PMID: 26509902 DOI: 10.1002/jbm.b.33520] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Revised: 07/03/2015] [Accepted: 07/18/2015] [Indexed: 12/18/2022]
Abstract
This article presents successful incorporation of ibuprofen in polylactic acid (PLA) nanofibers to create scaffolds for the treatment of both acute and chronic wounds. Nanofibrous PLA scaffolds containing 10, 20, or 30 wt % ibuprofen were created and ibuprofen release profiles quantified. In vitro cytotoxicity to human epidermal keratinocytes (HEK) and human dermal fibroblasts (HDF) of the three scaffolds with varying ibuprofen concentrations were evaluated and compared to pure PLA nanofibrous scaffolds. Thereafter, scaffolds loaded with ibuprofen at the concentration that promoted human skin cell viability and proliferation (20 wt %) were evaluated in vivo in nude mice using a full thickness skin incision model to determine the ability of these scaffolds to promote skin regeneration and/or assist with scarless healing. Both acellular and HEK and HDF cell-seeded 20 wt % ibuprofen loaded nanofibrous bandages reduced wound contraction compared with wounds treated with Tegaderm™ and sterile gauze. Newly regenerated skin on wounds treated with cell-seeded 20 wt % ibuprofen bandages exhibited significantly greater blood vessel formation relative to acellular ibuprofen bandages. We have found that degradable anti-inflammatory scaffolds containing 20 wt % ibuprofen promote human skin cell viability and proliferation in vitro, reduce wound contraction in vivo, and when seeded with skin cells, also enhance new blood vessel formation. The approaches and results reported here hold promise for multiple skin tissue engineering and wound healing applications. © 2015 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 105B: 327-339, 2017.
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Affiliation(s)
- M Mohiti-Asli
- Joint Department of Biomedical Engineering at University of North Carolina at Chapel Hill, North Carolina State University, Raleigh, North Carolina, 27695
| | - S Saha
- Joint Department of Biomedical Engineering at University of North Carolina at Chapel Hill, North Carolina State University, Raleigh, North Carolina, 27695
| | - S V Murphy
- Wake Forest Institute for Regenerative Medicine, Wake Forest University School of Medicine, Winston-Salem, North Carolina, 27157
| | - H Gracz
- Department of Molecular and Structural Biochemistry, North Carolina State University, Raleigh, North Carolina, 27695
| | - B Pourdeyhimi
- College of Textiles at North Carolina State University, Raleigh, North Carolina, 27695
| | - A Atala
- Wake Forest Institute for Regenerative Medicine, Wake Forest University School of Medicine, Winston-Salem, North Carolina, 27157
| | - E G Loboa
- Joint Department of Biomedical Engineering at University of North Carolina at Chapel Hill, North Carolina State University, Raleigh, North Carolina, 27695.,Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina, 27695
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103
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Kumar GP, Sanganal JS, Phani A, Manohara C, Tripathi SM, Raghavendra H, Janardhana P, Amaresha S, Swamy K, Prasad R. Anti-cancerous efficacy and pharmacokinetics of 6-mercaptopurine loaded chitosan nanoparticles. Pharmacol Res 2015; 100:47-57. [DOI: 10.1016/j.phrs.2015.07.025] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Revised: 07/26/2015] [Accepted: 07/26/2015] [Indexed: 11/29/2022]
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104
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Yu DG, Li XY, Wang X, Yang JH, Bligh SWA, Williams GR. Nanofibers Fabricated Using Triaxial Electrospinning as Zero Order Drug Delivery Systems. ACS APPLIED MATERIALS & INTERFACES 2015; 7:18891-18897. [PMID: 26244640 DOI: 10.1021/acsami.5b06007] [Citation(s) in RCA: 142] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A new strategy for creating functional trilayer nanofibers through triaxial electrospinning is demonstrated. Ethyl cellulose (EC) was used as the filament-forming matrix in the outer, middle, and inner working solutions and was combined with varied contents of the model active ingredient ketoprofen (KET) in the three fluids. Triaxial electrospinning was successfully carried out to generate medicated nanofibers. The resultant nanofibers had diameters of 0.74 ± 0.06 μm, linear morphologies, smooth surfaces, and clear trilayer nanostructures. The KET concentration in each layer gradually increased from the outer to the inner layer. In vitro dissolution tests demonstrated that the nanofibers could provide linear release of KET over 20 h. The protocol reported in this study thus provides a facile approach to creating functional nanofibers with sophisticated structural features.
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Affiliation(s)
- Deng-Guang Yu
- School of Materials Science & Engineering, University of Shanghai for Science and Technology , 516 Jungong Road, Yangpu District, Shanghai 200093, China
| | - Xiao-Yan Li
- School of Materials Science & Engineering, University of Shanghai for Science and Technology , 516 Jungong Road, Yangpu District, Shanghai 200093, China
| | - Xia Wang
- School of Materials Science & Engineering, University of Shanghai for Science and Technology , 516 Jungong Road, Yangpu District, Shanghai 200093, China
| | - Jun-He Yang
- School of Materials Science & Engineering, University of Shanghai for Science and Technology , 516 Jungong Road, Yangpu District, Shanghai 200093, China
| | - S W Annie Bligh
- Faculty of Science and Technology, University of Westminster , 115 New Cavendish Street, London W1W 6UW, U.K
| | - Gareth R Williams
- UCL School of Pharmacy, University College London , 29-39 Brunswick Square, London WC1N 1AX, U.K
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105
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Lopez FL, Ernest TB, Tuleu C, Gul MO. Formulation approaches to pediatric oral drug delivery: benefits and limitations of current platforms. Expert Opin Drug Deliv 2015; 12:1727-40. [PMID: 26165848 PMCID: PMC4673516 DOI: 10.1517/17425247.2015.1060218] [Citation(s) in RCA: 159] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Introduction: Most conventional drug delivery systems are not acceptable for pediatric patients as they differ in their developmental status and dosing requirements from other subsets of the population. Technology platforms are required to aid the development of age-appropriate medicines to maximize patient acceptability while maintaining safety, efficacy, accessibility and affordability. Areas covered: The current approaches and novel developments in the field of age-appropriate drug delivery for pediatric patients are critically discussed including patient-centric formulations, administration devices and packaging systems. Expert opinion: Despite the incentives provided by recent regulatory modifications and the efforts of formulation scientists, there is still a need for implementation of pharmaceutical technologies that enable the manufacture of licensed age-appropriate formulations. Harmonization of endeavors from regulators, industry and academia by sharing learning associated with data obtained from pediatric investigation plans, product development pathways and scientific projects would be the way forward to speed up bench-to-market age appropriate formulation development. A collaborative approach will benefit not only pediatrics, but other patient populations such as geriatrics would also benefit from an accelerated patient-centric approach to drug delivery.
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Affiliation(s)
- Felipe L Lopez
- a 1 University College London, School of Pharmacy, Department of Pharmaceutics , 29-39 Brunswick Square, London WC1N 1AX, UK
| | - Terry B Ernest
- b 2 GlaxoSmithKline, Product Development , New Frontiers Science Park, Third Avenue, Harlow, Essex CM19 5AW, UK
| | - Catherine Tuleu
- a 1 University College London, School of Pharmacy, Department of Pharmaceutics , 29-39 Brunswick Square, London WC1N 1AX, UK
| | - Mine Orlu Gul
- a 1 University College London, School of Pharmacy, Department of Pharmaceutics , 29-39 Brunswick Square, London WC1N 1AX, UK
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106
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In vitro dissolution-permeation evaluation of an electrospun cyclodextrin-based formulation of aripiprazole using μFlux™. Int J Pharm 2015; 491:180-9. [PMID: 26117189 DOI: 10.1016/j.ijpharm.2015.06.019] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2015] [Revised: 06/12/2015] [Accepted: 06/14/2015] [Indexed: 11/20/2022]
Abstract
Since it is a well-known fact that among the newly discovered active pharmaceutical ingredients the number of poorly water soluble candidates is continually increasing, dissolution enhancement of poorly water soluble drugs has become one of the central challenges of pharmaceutical studies. So far the preclinical studies have been mainly focused on formulation methods to enhance the dissolution of active compounds, in many cases disregarding the fact that the formulation matrix not only affects dissolution but also has an effect on the transport through biological membranes, changing permeation of the drug molecules. The aim of this study was to test an electrospun cyclodextrin-based formulation of aripiprazole with the novel μFlux apparatus, which monitors permeation together with dissolution, and by this means better in vitro-in vivo correlation is achieved. It was evinced that a cyclodextrin-based electrospun formulation of aripiprazole has the potential to ensure fast drug delivery through the oral mucosa owing to the ultrafast dissolution of the drug from the formulation and the enhanced flux across membranes as shown by the result of the novel in vitro dissolution and permeation test.
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107
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Downstream processing of polymer-based amorphous solid dispersions to generate tablet formulations. Int J Pharm 2015; 486:268-86. [DOI: 10.1016/j.ijpharm.2015.03.053] [Citation(s) in RCA: 112] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2014] [Revised: 03/25/2015] [Accepted: 03/26/2015] [Indexed: 11/21/2022]
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108
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Adeli E. Irbesartan-loaded electrospun nanofibers-based PVP K90 for the drug dissolution improvement: Fabrication,in vitroperformance assessment, andin vivoevaluation. J Appl Polym Sci 2015. [DOI: 10.1002/app.42212] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ehsan Adeli
- The International Branch; Shahid Beheshti University of Medical Sciences; Tehran Iran
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109
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Asawahame C, Sutjarittangtham K, Eitssayeam S, Tragoolpua Y, Sirithunyalug B, Sirithunyalug J. Antibacterial activity and inhibition of adherence of Streptococcus mutans by propolis electrospun fibers. AAPS PharmSciTech 2015; 16:182-91. [PMID: 25245331 DOI: 10.1208/s12249-014-0209-5] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2014] [Accepted: 08/25/2014] [Indexed: 11/30/2022] Open
Abstract
Mouth-dissolving fibers with antibacterial activity for the oral cavity were prepared by an electrospinning technique. Propolis extract was used as an active ingredient and polyvinylpyrrolidone (PVP) K90 as the polymer matrix. The morphology and diameter of the fibers were characterized by scanning electron microscopy. Antibacterial activity against Streptococcus mutans and the inhibition of S. mutans adhesion on a smooth glass surface during the biofilm formation were tested. Propolis, 5% (w/v), was combined with a PVP K90 solution, 8% (w/v), with or without Tween 80 including flavor additives and electrospun with an applied voltage of 15 kV. Uniform and smooth fibers of propolis-PVP K90 were obtained. The results showed that electrospun fibers with propolis extract can dissolve and release the propolis in water. Propolis-PVP electrospun fibers showed better antibacterial activity by reduction of bacteria adhesion on a smooth glass surface when compared to some commercial mouthwash products. These results indicated the potential of electrospun fibers to be used as mouth-dissolving fibers for effective antibacterial activity in the oral cavity.
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110
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Electrospun nanofibers as a potential controlled-release solid dispersion system for poorly water-soluble drugs. Int J Pharm 2015; 479:252-60. [DOI: 10.1016/j.ijpharm.2014.12.024] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2014] [Revised: 12/12/2014] [Accepted: 12/13/2014] [Indexed: 11/22/2022]
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111
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Illangakoon UE, Gill H, Shearman GC, Parhizkar M, Mahalingam S, Chatterton NP, Williams GR. Fast dissolving paracetamol/caffeine nanofibers prepared by electrospinning. Int J Pharm 2014; 477:369-79. [DOI: 10.1016/j.ijpharm.2014.10.036] [Citation(s) in RCA: 101] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2014] [Revised: 10/06/2014] [Accepted: 10/11/2014] [Indexed: 01/04/2023]
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112
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Electrospun Nanofibers for Fast Dissolution of Naproxen Prepared Using a Coaxial Process with Ethanol as a Shell Fluid. ACTA ACUST UNITED AC 2014. [DOI: 10.4028/www.scientific.net/amm.662.29] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The present paper reports a new type of medicated nanofibers loaded with naproxen, which were fabricated using a coaxial electrospinning process with only ethanol as the shell fluid. Field emission scanning electron microscopic observations clearly showed that high quality linear nanofibers with smooth surface and an average diameter of 270 ± 60 nm were generated under a shell-to-core fluid rate ratio of 0.2. X-ray diffraction patterns suggested that the drug was distributed homogeneously in the polymer matrix. In vitro dissolution tests demonstrated that the nanofibers could release the entire contained drug in one minute, whereas the commercial naproxen dispersible tablets took over 40 minutes to exhaust all the drug. The coaxial electrospinning process can provide new way for developing novel drug delivery systems.
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113
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Vrbata P, Berka P, Stránská D, Doležal P, Lázníček M. Electrospinning of diosmin from aqueous solutions for improved dissolution and oral absorption. Int J Pharm 2014; 473:407-13. [DOI: 10.1016/j.ijpharm.2014.07.017] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2014] [Revised: 07/10/2014] [Accepted: 07/11/2014] [Indexed: 01/06/2023]
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114
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Hallan SS, Kaur P, Kaur V, Mishra N, Vaidya B. Lipid polymer hybrid as emerging tool in nanocarriers for oral drug delivery. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2014; 44:334-49. [PMID: 25237838 DOI: 10.3109/21691401.2014.951721] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The oral route for drug delivery is a widely accepted route. For that reason, many researchers are currently working to develop efficient oral drug delivery systems. Use of polymeric nanoparticles (NPs) and lipid carrier systems, including liposomes, solid lipid nanoparticles (SLNs) and nanostructured lipid carriers (NLC), has limitations such as drug leakage and high water content of dispersions. Thus, lipid polymer hybrid nanoparticles (LPNs) have been explored by the researchers to provide a better effect using properties of both polymers and lipids. The present review is focused on the challenges, possibilities, and future perspectives of LPNs for oral delivery.
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Affiliation(s)
| | - Prabhjot Kaur
- a Nanomedicine Research Centre, I.S.F. College of Pharmacy , Moga , Punjab , India
| | - Veerpal Kaur
- a Nanomedicine Research Centre, I.S.F. College of Pharmacy , Moga , Punjab , India
| | - Neeraj Mishra
- a Nanomedicine Research Centre, I.S.F. College of Pharmacy , Moga , Punjab , India
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115
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Kumar GP, Phani A, Prasad R, Sanganal JS, Manali N, Gupta R, Rashmi N, Prabhakara G, Salins CP, Sandeep K, Raju D. Polyvinylpyrrolidone oral films of enrofloxacin: Film characterization and drug release. Int J Pharm 2014; 471:146-52. [DOI: 10.1016/j.ijpharm.2014.05.033] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2014] [Revised: 04/17/2014] [Accepted: 05/18/2014] [Indexed: 11/27/2022]
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116
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Raimi-Abraham BT, Mahalingam S, Edirisinghe M, Craig DQ. Generation of poly(N-vinylpyrrolidone) nanofibres using pressurised gyration. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 39:168-76. [DOI: 10.1016/j.msec.2014.02.016] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2013] [Revised: 01/18/2014] [Accepted: 02/12/2014] [Indexed: 11/26/2022]
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117
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Li C, Yu DG, Williams GR, Wang ZH. Fast-dissolving core-shell composite microparticles of quercetin fabricated using a coaxial electrospray process. PLoS One 2014; 9:e92106. [PMID: 24643072 PMCID: PMC3958439 DOI: 10.1371/journal.pone.0092106] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2013] [Accepted: 02/18/2014] [Indexed: 11/19/2022] Open
Abstract
This study reports on novel fast-dissolving core-shell composite microparticles of quercetin fabricated using coaxial electrospraying. A PVC-coated concentric spinneret was developed to conduct the electrospray process. A series of analyses were undertaken to characterize the resultant particles in terms of their morphology, the physical form of their components, and their functional performance. Scanning and transmission electron microscopies revealed that the microparticles had spherical morphologies with clear core-shell structure visible. Differential scanning calorimetry and X-ray diffraction verified that the quercetin active ingredient in the core and sucralose and sodium dodecyl sulfate (SDS) excipients in the shell existed in the amorphous state. This is believed to be a result of second-order interactions between the components; these could be observed by Fourier transform infrared spectroscopy. In vitro dissolution and permeation studies showed that the microparticles rapidly released the incorporated quercetin within one minute, and had permeation rates across the sublingual mucosa around 10 times faster than raw quercetin.
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Affiliation(s)
- Chen Li
- Institute of Biotechnology, Shanxi University, Taiyuan, China
| | - Deng-Guang Yu
- School of Materials & Engineering, University of Shanghai for Science and Technology, Shanghai, China
- * E-mail: (DGY); (ZHW)
| | | | - Zhuan-Hua Wang
- Institute of Biotechnology, Shanxi University, Taiyuan, China
- * E-mail: (DGY); (ZHW)
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118
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Yan J, Wu YH, Yu DG, Williams GR, Huang SM, Tao W, Sun JY. Electrospun acid–base pair solid dispersions of quercetin. RSC Adv 2014. [DOI: 10.1039/c4ra10221e] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An electrospun acid–base pair solid dispersion in the form of core–shell nanofibers was developed for improving the dissolution of quercetin.
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Affiliation(s)
- Jie Yan
- Research Center for Analysis and Measurement
- Donghua University
- Shanghai 201620, China
| | - Yong-Hui Wu
- The Department of Mechanical Engineering
- Guangxi Technological College of Machinery and Electricity
- Nanning 530007, China
| | - Deng-Guang Yu
- School of Materials Science & Engineering
- University of Shanghai for Science and Technology
- Shanghai 200093, China
| | | | - Shang-Meng Huang
- The Department of Mechanical Engineering
- Guangxi Technological College of Machinery and Electricity
- Nanning 530007, China
| | - Wen Tao
- School of Materials Science & Engineering
- University of Shanghai for Science and Technology
- Shanghai 200093, China
| | - Jun-Yi Sun
- School of Materials Science & Engineering
- University of Shanghai for Science and Technology
- Shanghai 200093, China
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119
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Illangakoon UE, Nazir T, Williams GR, Chatterton NP. Mebeverine‐Loaded Electrospun Nanofibers: Physicochemical Characterization and Dissolution Studies. J Pharm Sci 2014; 103:283-92. [DOI: 10.1002/jps.23759] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2013] [Revised: 09/26/2013] [Accepted: 10/01/2013] [Indexed: 01/19/2023]
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120
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Manasco JL, Tang C, Burns NA, Saquing CD, Khan SA. Rapidly dissolving poly(vinyl alcohol)/cyclodextrin electrospun nanofibrous membranes. RSC Adv 2014. [DOI: 10.1039/c3ra43836h] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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121
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Vo CLN, Park C, Lee BJ. Current trends and future perspectives of solid dispersions containing poorly water-soluble drugs. Eur J Pharm Biopharm 2013; 85:799-813. [DOI: 10.1016/j.ejpb.2013.09.007] [Citation(s) in RCA: 422] [Impact Index Per Article: 38.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2013] [Revised: 07/29/2013] [Accepted: 09/09/2013] [Indexed: 11/24/2022]
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122
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Fast disintegrating quercetin-loaded drug delivery systems fabricated using coaxial electrospinning. Int J Mol Sci 2013; 14:21647-59. [PMID: 24185912 PMCID: PMC3856026 DOI: 10.3390/ijms141121647] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2013] [Revised: 10/26/2013] [Accepted: 10/28/2013] [Indexed: 12/13/2022] Open
Abstract
The objective of this study is to develop a structural nanocomposite of multiple components in the form of core-sheath nanofibres using coaxial electrospinning for the fast dissolving of a poorly water-soluble drug quercetin. Under the selected conditions, core-sheath nanofibres with quercetin and sodium dodecyl sulphate (SDS) distributed in the core and sheath part of nanofibres, respectively, were successfully generated, and the drug content in the nanofibres was able to be controlled simply through manipulating the core fluid flow rates. Field emission scanning electron microscope (FESEM) images demonstrated that the nanofibres prepared from the single sheath fluid and double core/sheath fluids (with core-to-sheath flow rate ratios of 0.4 and 0.7) have linear morphology with a uniform structure and smooth surface. The TEM images clearly demonstrated the core-sheath structures of the produced nanocomposites. Differential scanning calorimetry (DSC) and X-ray diffraction (XRD) results verified that quercetin and SDS were well distributed in the polyvinylpyrrolidone (PVP) matrix in an amorphous state, due to the favourite second-order interactions. In vitro dissolution studies showed that the core-sheath composite nanofibre mats could disintegrate rapidly to release quercetin within 1 min. The study reported here provides an example of the systematic design, preparation, characterization and application of a new type of structural nanocomposite as a fast-disintegrating drug delivery system.
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123
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Noor Azman NZ, Siddiqui SA, Haroosh HJ, Albetran HMM, Johannessen B, Dong Y, Low IM. Characteristics of X-ray attenuation in electrospun bismuth oxide/polylactic acid nanofibre mats. JOURNAL OF SYNCHROTRON RADIATION 2013; 20:741-748. [PMID: 23955038 DOI: 10.1107/s0909049513017871] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2013] [Accepted: 06/28/2013] [Indexed: 06/02/2023]
Abstract
The characteristics of the X-ray attenuation in electrospun nano(n)- and micro(m)-Bi2O3/polylactic acid (PLA) nanofibre mats with different Bi2O3 loadings were compared as a function of energy using mammography (i.e. tube voltages of 22-49 kV) and X-ray absorption spectroscopy (XAS) (7-20 keV). Results indicate that X-ray attenuation by electrospun n-Bi2O3/PLA nanofibre mats is distinctly higher than that of m-Bi2O3/PLA nanofibre mats at all energies investigated. In addition, with increasing filler loading (n-Bi2O3 or m-Bi2O3), the porosity of the nanofibre mats decreased, thus increasing the X-ray attenuation, except for the sample containing 38 wt% Bi2O3 (the highest loading in the present study). The latter showed higher porosity, with some beads formed, thus resulting in a sudden decrease in the X-ray attenuation.
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Affiliation(s)
- Nurul Z Noor Azman
- Department of Imaging and Applied Physics, Curtin University, GPO Box U1987, Perth, WA 6845, Australia
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124
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Li X, Kanjwal MA, Lin L, Chronakis IS. Electrospun polyvinyl-alcohol nanofibers as oral fast-dissolving delivery system of caffeine and riboflavin. Colloids Surf B Biointerfaces 2013. [DOI: 10.1016/j.colsurfb.2012.10.016] [Citation(s) in RCA: 216] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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125
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Yu D, Wang X, Li X, Chian W, Li Y, Liao Y. Electrospun biphasic drug release polyvinylpyrrolidone/ethyl cellulose core/sheath nanofibers. Acta Biomater 2013; 9:5665-72. [PMID: 23099302 DOI: 10.1016/j.actbio.2012.10.021] [Citation(s) in RCA: 131] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2012] [Revised: 09/23/2012] [Accepted: 10/16/2012] [Indexed: 02/03/2023]
Abstract
The capability of core/sheath nanofibers prepared using coaxial electrospinning to provide adjustable biphasic drug release was investigated. Using ketoprofen (KET) as the model drug, polyvinylpyrrolidone as the sheath polymer, and ethyl cellulose as the core matrix, the coaxial process could be conducted smoothly and continuously without spinneret clogging. Scanning electron microscopy and transmission electron microscopy revealed linear nanofibers with homogeneous and clear core/sheath structures. Differential scanning calorimetry and X-ray diffraction verified that the core/sheath nanofibers were nanocomposites, with the drug present in the polymer matrix in an amorphous state. Attenuated total reflectance-Fourier transform infrared spectra demonstrated that the sheath polymer and core matrix were compatible with KET owing to hydrogen bonding. In vitro dissolution tests showed that the core/sheath nanofibers could provide typical biphasic drug release profiles consisting of an immediate and sustained release. The amount of drug released in the first phase was tailored by adjusting the sheath flow rate, and the remaining drug released in the second phase was controlled by a typical diffusion mechanism. The present study shows a simple and useful approach for the systematic design and fabrication of novel biomaterials with structural characteristics for providing complicated and programmed drug release profiles using coaxial electrospinning.
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126
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Akhgari A, Heshmati Z, Sharif Makhmalzadeh B. Indomethacin electrospun nanofibers for colonic drug delivery: preparation and characterization. Adv Pharm Bull 2013; 3:85-90. [PMID: 24312817 DOI: 10.5681/apb.2013.014] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2012] [Revised: 10/13/2012] [Accepted: 10/20/2012] [Indexed: 11/17/2022] Open
Abstract
PURPOSE The objective of this study was to prepare a suitable form of nanofiber for indomethacin using polymers Eudragit RS100 (ERS) and Eudragit S100 (ES) and to evaluate the effect of some variables on the characteristics of resulted electrospunnanofibers. METHODS Electrospinning process was used for preparation of nanofibers. Different solutions of combinations of ERS, ES and indomethacin in various solvents and different ratios were prepared. The spinning solutions were loaded in 10 mL syringes. The feeding rate was fixed by a syringe pump at 2.0 mL/h and a high voltage supply at range 10-18 kV was applied for electrospinning. Electrospunnanofibers were collected and evaluated by scanning electron microscopy, differential scanning calorimetry and FTIR for possible interaction between materials used in nanofibers. The effect of solvent and viscosity on the characteristics of nanofibers also was investigated. RESULTS Fiber formation was successful using a solvent ethanol and mixture of ERS and ES. Increase in viscosity of ethanolic solutions of ERS followed by addition of ES in the solution led to preparation of smooth fibers with larger diameters and less amounts of beads. DSC analysis of fibers certified that indomethacin is evenly distributed in the nanofibers in an amorphous state. FTIR analysis did not indicate significant interaction between drug and polymer. CONCLUSION It was shown that drug-loaded ERS and ES nanofibers could be prepared by exact selection of range of variables such as type of solvent, drug: polymer ratio and solution viscosity and the optimized formulations could be useful for colonic drug delivery.
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Affiliation(s)
- Abbas Akhgari
- Nanotechnology Research Center and School of Pharmacy, Ahvaz Jundishpaur University of Medical Sciences, Ahvaz,Iran
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127
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Yu DG, Chian W, Wang X, Li XY, Li Y, Liao YZ. Linear drug release membrane prepared by a modified coaxial electrospinning process. J Memb Sci 2013. [DOI: 10.1016/j.memsci.2012.09.062] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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128
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Shi Y, Xu S, Dong A, Zhang J. Design and in vitro evaluation of transdermal patches based on ibuprofen-loaded electrospun fiber mats. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2013; 24:333-341. [PMID: 23138838 DOI: 10.1007/s10856-012-4805-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2012] [Accepted: 10/24/2012] [Indexed: 06/01/2023]
Abstract
To improve the poor compatibility among different components of Drug-in-adhesive type patch, two novel plasters (Drug-in-fiber and Drug-in-adhesive/fiber) were developed based on ibuprofen (IBU)-loaded fiber mats. These fibrous mats were fabricated via electrospinning of cellulose acetate/poly(vinylpyrrolidone) composites in a binary solvent of N,N-dimethyl acetamide/acetone. Physical status studies suggested that Drug-in-fiber could inhibit IBU re-crystallization, but the active ingredients were released at a relatively slow rate due to the dual-resistance of fiber mat and adhesive matrix. To overcome this shortcoming, Drug-in-adhesive/fiber was designed by coupling medicated hydrophilic pressure sensitive adhesive and IBU-loaded fiber mat. This method endowed Drug-in-adhesive/fiber a fast IBU release rate and high permeated drug amount though simulative skins. This design separated enhancer from adhesive matrix, which guaranteed Drug-in-adhesive/fiber excellent adhesion forces. Hence, the plasters based on medicated fiber mats improved the compatibility among patch components.
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Affiliation(s)
- Yongli Shi
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
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129
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Nagy ZK, Balogh A, Drávavölgyi G, Ferguson J, Pataki H, Vajna B, Marosi G. Solvent-Free Melt Electrospinning for Preparation of Fast Dissolving Drug Delivery System and Comparison with Solvent-Based Electrospun and Melt Extruded Systems. J Pharm Sci 2013; 102:508-17. [DOI: 10.1002/jps.23374] [Citation(s) in RCA: 102] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2012] [Revised: 10/18/2012] [Accepted: 10/24/2012] [Indexed: 11/10/2022]
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130
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Yu DG, Williams GR, Wang X, Liu XK, Li HL, Bligh SWA. Dual drug release nanocomposites prepared using a combination of electrospraying and electrospinning. RSC Adv 2013. [DOI: 10.1039/c3ra40334c] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
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131
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Yu DG, Liu F, Cui L, Liu ZP, Wang X, Bligh SWA. Coaxial electrospinning using a concentric Teflon spinneret to prepare biphasic-release nanofibers of helicid. RSC Adv 2013. [DOI: 10.1039/c3ra43222j] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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132
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Yu DG, Li XX, Ge JW, Ye PP, Wang X. The Influence of Sheath Solvent’s Flow Rate on the Quality of Electrospun Ethyl Cellulose Nanofibers. ACTA ACUST UNITED AC 2013. [DOI: 10.4236/mnsms.2013.34b001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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133
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Karthikeyan K, Guhathakarta S, Rajaram R, Korrapati PS. Electrospun zein/eudragit nanofibers based dual drug delivery system for the simultaneous delivery of aceclofenac and pantoprazole. Int J Pharm 2012; 438:117-22. [DOI: 10.1016/j.ijpharm.2012.07.075] [Citation(s) in RCA: 77] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2012] [Revised: 07/18/2012] [Accepted: 07/21/2012] [Indexed: 10/27/2022]
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134
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Jiang YN, Mo HY, Yu DG. Electrospun drug-loaded core–sheath PVP/zein nanofibers for biphasic drug release. Int J Pharm 2012; 438:232-9. [DOI: 10.1016/j.ijpharm.2012.08.053] [Citation(s) in RCA: 120] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2012] [Revised: 08/26/2012] [Accepted: 08/29/2012] [Indexed: 10/27/2022]
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135
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Dai XY, Nie W, Wang YC, Shen Y, Li Y, Gan SJ. Electrospun emodin polyvinylpyrrolidone blended nanofibrous membrane: a novel medicated biomaterial for drug delivery and accelerated wound healing. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2012; 23:2709-2716. [PMID: 22875606 DOI: 10.1007/s10856-012-4728-x] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2012] [Accepted: 07/23/2012] [Indexed: 06/01/2023]
Abstract
In this work, blended nanofibrous membranes were prepared by an electrospinning technique with polyvinylpyrrolidone (PVP) K90 as the filament-forming polymer, and emodin, an extract of polygonum cuspidate known as a medicinal plant, as the treatment drug. Detailed analysis of the blended nanofibrous membrane by scanning electron microscopy, Differential scanning calorimetry and X-ray diffraction revealed that emodin was well distributed in the ultrafine fibers in the form of amorphous nanosolid dispersions. Results from attenuated total reflectance Fourier transform infrared spectra suggested that the main interactions between PVP and emodin might be mediated through hydrogen bonding. In vitro dissolution tests proved that the blended nanofibrous membrane produced more desired release kinetics of the entrapped drug (emodin) as compared to the pure drug. Furthermore, wound healing test and histological evaluation revealed that the emodin loaded nanofibrous membrane to be more effective as a healing accelerator thereby proving potential strategies to develop composite drug delivery system as well as promising materials for future therapeutic biomedical applications.
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Affiliation(s)
- Xin-Yi Dai
- Division of Plastic Surgery, Shanghai Jiaotong University Affiliate First People Hospital, Shanghai, China.
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136
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Electrospun hybrid nanofibers doped with nanoparticles or nanotubes for biomedical applications. Ther Deliv 2012; 3:1155-69. [DOI: 10.4155/tde.12.103] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Electrospinning is a powerful technique to produce fibers with a diameter ranging from tens of nanometers to several micrometers. Compared with single-component nanofibers, composite or hybrid nanofibers are promising due to the unique properties possessed by both the host and the guest materials. Doping nanoparticles (NPs) or nanotubes (NTs) have excellent optical, mechanical, electrical or catalytic properties within polymer nanofibers, which makes it possible to produce functional nanofibers with promising applications. In this review, followed by a brief introduction of basic theory of electrospinning techniques, we give a literature survey of the NP- or NT-doped electrospun polymer nanofibers in terms of the producing methods and potential applications in the fields of tissue engineering, wound dressing and drug-delivery systems. Some of the aspects related to the improved protein adsorption capability, mechanical durability and, thus, improved cell attachment and proliferation of the NT-doped polymer nanofibers, as well as the significantly decreased burst-release profile of the NT-doped polymer nanofibers used as drug-delivery systems are discussed.
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137
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Yu DG, Yu JH, Chen L, Williams GR, Wang X. Modified coaxial electrospinning for the preparation of high-quality ketoprofen-loaded cellulose acetate nanofibers. Carbohydr Polym 2012; 90:1016-23. [DOI: 10.1016/j.carbpol.2012.06.036] [Citation(s) in RCA: 104] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2012] [Revised: 06/01/2012] [Accepted: 06/13/2012] [Indexed: 10/28/2022]
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138
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Electrospun Formulations Containing Crystalline Active Pharmaceutical Ingredients. Pharm Res 2012; 30:238-46. [DOI: 10.1007/s11095-012-0868-4] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2012] [Accepted: 08/15/2012] [Indexed: 11/26/2022]
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139
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Shi Y, Zhang J, Xu S, Dong A. Electrospinning of artemisinin-loaded core-shell fibers for inhibiting drug re-crystallization. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 24:551-64. [DOI: 10.1080/09205063.2012.698895] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Yongli Shi
- a School of Chemical Engineering and Technology, Tianjin University , Tianjin , 300072 , China
| | - Jianhua Zhang
- a School of Chemical Engineering and Technology, Tianjin University , Tianjin , 300072 , China
| | - Shuxin Xu
- a School of Chemical Engineering and Technology, Tianjin University , Tianjin , 300072 , China
| | - Anjie Dong
- a School of Chemical Engineering and Technology, Tianjin University , Tianjin , 300072 , China
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140
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Brettmann BK, Tsang S, Forward KM, Rutledge GC, Myerson AS, Trout BL. Free surface electrospinning of fibers containing microparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:9714-9721. [PMID: 22621200 DOI: 10.1021/la301422x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Many materials have been fabricated using electrospinning, including pharmaceutical formulations, superhydrophobic surfaces, catalysis supports, filters, and tissue engineering scaffolds. Often these materials can benefit from microparticles included within the electrospun fibers. In this work, we evaluate a high-throughput free surface electrospinning technique to prepare fibers containing microparticles. We investigate the spinnability of polyvinylpyrrolidone (PVP) solutions containing suspended polystyrene (PS) beads of 1, 3, 5, and 10 μm diameter in order to better understand free surface electrospinning of particle suspensions. PS bead suspensions with both 55 kDa PVP and 1.3 MDa PVP were spinnable at 1:10, 1:5, and 1:2 PS:PVP mass loadings for all particle sizes studied. The final average fiber diameters ranged from 0.47 to 1.2 μm and were independent of the particle size and particle loading, indicating that the fiber diameter can be smaller than the particles entrained and can furthermore be adjusted based on solution properties and electrospinning parameters, as is the case for electrospinning of solutions without particles.
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Affiliation(s)
- Blair K Brettmann
- Department of Chemical Engineering, Massachusetts Institute of Technology, E19-502B, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139-4307, United States
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141
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Electrospun matrices for localized drug delivery: Current technologies and selected biomedical applications. Eur J Pharm Biopharm 2012; 81:1-13. [DOI: 10.1016/j.ejpb.2012.01.016] [Citation(s) in RCA: 212] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2011] [Revised: 01/28/2012] [Accepted: 01/31/2012] [Indexed: 01/13/2023]
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142
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Electrospun nanofibers in drug delivery: recent developments and perspectives. Ther Deliv 2012; 3:515-33. [DOI: 10.4155/tde.12.17] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
In this review article, some key challenges in drug delivery are first introduced and methods that have been applied in attempts to solve them enumerated. Particularly intractable problems are highlighted: these include issues of solubility, targeting and drug degradation. The technique of electrospinning is subsequently introduced, and the influence of processing parameters on the fibers produced discussed. The potential of electrospun nanofibers in drug delivery is then explored, with examples given from the recent literature to illustrate how fibers can be used to overcome hurdles in drug solubility, degradation and targeting. Future perspectives and challenges are also considered.
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143
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Pitarresi G, Fiorica C, Palumbo FS, Calascibetta F, Giammona G. Polyaspartamide-polylactide electrospun scaffolds for potential topical release of Ibuprofen. J Biomed Mater Res A 2012; 100:1565-72. [DOI: 10.1002/jbm.a.34095] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2011] [Revised: 01/13/2012] [Accepted: 01/17/2012] [Indexed: 11/10/2022]
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144
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Brettmann BK, Myerson AS, Trout BL. Solid-state nuclear magnetic resonance study of the physical stability of electrospun drug and polymer solid solutions. J Pharm Sci 2012; 101:2185-93. [PMID: 22411707 DOI: 10.1002/jps.23107] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2012] [Revised: 02/14/2012] [Accepted: 02/17/2012] [Indexed: 12/11/2022]
Abstract
A major challenge in utilizing the amorphous form of an active pharmaceutical ingredient (API) in a final oral dosage form is preventing crystallization over time and ensuring stability. One method to improve stability is lowering the mobility of an API by formulating as a solid solution with an excipient. In this work, we use electrospinning to prepare solid solutions of API, aliskiren (SPP) or indomethacin (IND), and a polymer, polyvinylpyrrolidone (PVP). The stability of the solid solutions over 6-month storage in a desiccator at 40 °C was investigated. Using X-ray diffraction and differential scanning calorimetry, it was determined that no crystals were present in the four formulations tested--1:1 SPP-PVP, 4:1 SPP-PVP, 1:1 IND-PVP, and 2:1 IND-PVP at any time. Solid-state nuclear magnetic resonance relaxation time measurements were used to determine whether phase separation of the API and polymer occurred during the study period. It was found that all formulations remained homogeneous down to at least a 2-10 nm length scale, indicating that for these APIs, electrospinning is an acceptable method for forming stable amorphous solid solutions.
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Affiliation(s)
- Blair Kathryn Brettmann
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
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145
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Nagy ZK, Balogh A, Vajna B, Farkas A, Patyi G, Kramarics Á, Marosi G. Comparison of Electrospun and Extruded Soluplus®-Based Solid Dosage Forms of Improved Dissolution. J Pharm Sci 2012; 101:322-32. [DOI: 10.1002/jps.22731] [Citation(s) in RCA: 165] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2011] [Revised: 07/08/2011] [Accepted: 08/02/2011] [Indexed: 11/07/2022]
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146
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Brettmann B, Bell E, Myerson A, Trout B. Solid-state NMR characterization of high-loading solid solutions of API and excipients formed by electrospinning. J Pharm Sci 2011; 101:1538-45. [PMID: 22213488 DOI: 10.1002/jps.23032] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2011] [Revised: 11/11/2011] [Accepted: 12/08/2011] [Indexed: 11/10/2022]
Abstract
A major focus area in improving pharmaceutical manufacturing is decreasing powder-handling steps such as milling, granulation, and blending. One approach to go directly from active pharmaceutical ingredients (API) and excipients in solution to a formulated drug product is to use electrospinning to make solid formulations of API in a polymer. Because of the rapid evaporation rate in electrospinning, the process usually results in a well-mixed solid dispersion of drugs in the polymer. In this study, solid-state nuclear magnetic resonance is used to examine phase separation in formulations of aliskiren (SPP) and indomethacin (IND) with polyvinylpyrrolidone (PVP) prepared by electrospinning and hot-melt extrusion. It was found that 1:1 SPP-PVP, 1:1 IND-PVP, and 4:1 SPP-PVP formulations prepared by electrospinning are homogeneous solid solutions down to a 2-11 nm length scale, whereas a 4:1 SPP-PVP formulation prepared by hot-melt extrusion exhibits phase separation with domain sizes of 20-100 nm or larger.
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Affiliation(s)
- Blair Brettmann
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
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147
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Yu DG, Zhu LM, Branford-White CJ, Yang JH, Wang X, Li Y, Qian W. Solid dispersions in the form of electrospun core-sheath nanofibers. Int J Nanomedicine 2011; 6:3271-80. [PMID: 22228995 PMCID: PMC3252675 DOI: 10.2147/ijn.s27468] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Background The objective of this investigation was to develop a new type of solid dispersion in the form of core-sheath nanofibers using coaxial electrospinning for poorly water-soluble drugs. Different functional ingredients can be placed in various parts of core-sheath nanofibers to improve synergistically the dissolution and permeation properties of encapsulated drugs and to enable drugs to exert their actions. Methods Using acyclovir as a model drug, polyvinylpyrrolidone as the hydrophilic filament-forming polymer matrix, sodium dodecyl sulfate as a transmembrane enhancer, and sucralose as a sweetener, core-sheath nanofibers were successfully prepared, with the sheath part consisting of polyvinylpyrrolidone, sodium dodecyl sulfate, and sucralose, and the core part composed of polyvinylpyrrolidone and acyclovir. Results The core-sheath nanofibers had an average diameter of 410 ± 94 nm with a uniform structure and smooth surface. Differential scanning calorimetry and x-ray diffraction results demonstrated that acyclovir, sodium dodecyl sulfate, and sucralose were well distributed in the polyvinylpyrrolidone matrix in an amorphous state due to favoring of second-order interactions. In vitro dissolution and permeation studies showed that the core-sheath nanofiber solid dispersions could rapidly release acyclovir within one minute, with an over six-fold increased permeation rate across the sublingual mucosa compared with that of crude acyclovir particles. Conclusion The study reported here provides an example of the systematic design, preparation, characterization, and application of a novel type of solid dispersion consisting of multiple components and structural characteristics.
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Affiliation(s)
- Deng-Guang Yu
- School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai, People's Republic of China.
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148
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Preparation of ultrafine fast-dissolving feruloyl-oleyl-glycerol-loaded polyvinylpyrrolidone fiber mats via electrospinning. Colloids Surf B Biointerfaces 2011; 88:304-9. [DOI: 10.1016/j.colsurfb.2011.07.006] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2011] [Revised: 06/28/2011] [Accepted: 07/04/2011] [Indexed: 10/18/2022]
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149
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150
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Yu DG, Lu P, Branford-White C, Yang JH, Wang X. Polyacrylonitrile nanofibers prepared using coaxial electrospinning with LiCl solution as sheath fluid. NANOTECHNOLOGY 2011; 22:435301. [PMID: 21955591 DOI: 10.1088/0957-4484/22/43/435301] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A modified coaxial electrospinning process including an electrolyte solution as sheath fluid was used for preparing high quality polymer nanofibers. A series of polyacrylonitrile (PAN) nanofibers were fabricated utilizing a coaxial electrospinning containing LiCl in N, N-dimethylacetamide (DMAc) as the sheath fluid. FESEM results demonstrated that the sheath LiCl solutions have a significant influence on the quality of PAN nanofibers. Nanofibers with smaller diameters, smoother surfaces and uniform structures were successfully prepared. The diameters of nanofibers were controlled by adjusting the conductivity of the sheath fluid over a suitable range and this was determined by varying LiCl concentrations. The influence of the effect of LiCl on the formation of PAN fibers is discussed and it is concluded that coaxial electrospinning with electrolyte solutions is a convenient and facile process for achieving high quality polymer nanofibers.
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Affiliation(s)
- Deng-Guang Yu
- School of Material Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, People's Republic of China.
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