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Behzadnia M, Salmanpour M, Heidari M, Monajati M, Farjadian F, Abedi M, Tamaddon AM. Sorafenib tosylate incorporation into mesoporous starch xerogel for in-situ micronization and oral bioavailability enhancement. Drug Dev Ind Pharm 2022; 48:343-354. [PMID: 36066848 DOI: 10.1080/03639045.2022.2113405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Poorly water-soluble drugs like sorafenib tosylate (SFB) can be made more soluble and orally bioavailable using a biocompatible hydrophilic matrix yields amorphous or microcrystalline drugs with high stability and low recrystallization risk. Mesoporous starch (MPS) due to its edibility, biodegradability, high surface area, and confined pores. In this study, MPS, either alone or in combination with polyvinylpyrrolidone (PVP), was employed for improving SFB oral bioavailability. To this aim, MPS was prepared in three steps: gelatinization, solvent exchange, and vacuum drying, after which it was used to incorporate SFB at various ratios using the immersion/solvent evaporation technique. Nitrogen adsorption/desorption analysis, Fourier transform infrared spectrometry (FTIR), field emission scanning electron microscopy (FE-SEM), powder X-ray diffraction (XRD) crystallography, and differential scanning calorimetry (DSC) were used to characterize SFB-loaded and drug-free samples, which confirmed the successful preparation of mesoporous structures with desirable uniform porosity, small pore size (about 5.3 nm), and specific surface area of about 24 m2/g. In-vitro dissolution testing revealed that the SFB dissolution rate increased substantially for the loaded MPS or MPS-PVP samples. Furthermore, when SFB was loaded in MPS-PVP, single-dose pharmacokinetics in rats confirmed an enhanced oral absorption kinetic. Therefore, impregnation of poorly soluble drugs such as SFB in the PVP-modified MPS excipient, which is constructed from a combination of mesoporous materials and a drug recrystallization inhibitor such as hydrophilic polymers, is proposed as a promising strategy for desirable enhancements in drug solubility, oral bioavailability, and efficacy.
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Affiliation(s)
- Mehrnoosh Behzadnia
- Department of Pharmaceutical Nanotechnology, Center for Nanotechnology in Drug Delivery, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Mohsen Salmanpour
- Department of Pharmaceutical Nanotechnology, Center for Nanotechnology in Drug Delivery, Shiraz University of Medical Sciences, Shiraz, Iran.,Cellular and Molecular Biology Research Center, Larestan University of Medical Sciences, Larestan, Iran
| | - Mana Heidari
- Department of Pharmaceutical Nanotechnology, Center for Nanotechnology in Drug Delivery, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Maryam Monajati
- Department of Pharmaceutical Nanotechnology, Center for Nanotechnology in Drug Delivery, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Fatemeh Farjadian
- Department of Pharmaceutical Nanotechnology, Center for Nanotechnology in Drug Delivery, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Mehdi Abedi
- Department of Pharmaceutical Nanotechnology, Center for Nanotechnology in Drug Delivery, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Ali Mohammad Tamaddon
- Department of Pharmaceutical Nanotechnology, Center for Nanotechnology in Drug Delivery, Shiraz University of Medical Sciences, Shiraz, Iran.,Department of Pharmaceutical Nanotechnology, Shiraz University of Medical Sciences, Shiraz, Iran
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Micronization of a poorly water-soluble drug, fenofibrate, via supercritical-fluid-assisted spray-drying. JOURNAL OF PHARMACEUTICAL INVESTIGATION 2022. [DOI: 10.1007/s40005-022-00565-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Preparation and Characterization of Fenofibrate Microparticles with Surface-Active Additives: Application of a Supercritical Fluid-Assisted Spray-Drying Process. Pharmaceutics 2021; 13:pharmaceutics13122061. [PMID: 34959341 PMCID: PMC8709266 DOI: 10.3390/pharmaceutics13122061] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 11/25/2021] [Accepted: 11/26/2021] [Indexed: 11/17/2022] Open
Abstract
In this study, supercritical fluid-assisted spray-drying (SA-SD) was applied to achieve the micronization of fenofibrate particles possessing surface-active additives, such as d-α-tocopheryl polyethylene glycol 1000 succinate (TPGS), sucrose mono palmitate (Sucroester 15), and polyoxyethylene 52 stearate (Myrj 52), to improve the pharmacokinetic and pharmacodynamic properties of fenofibrate. For comparison, the same formulation was prepared using a spray-drying (SD) process, and then both methods were compared. The SA-SD process resulted in a significantly smaller mean particle size (approximately 2 μm) compared to that of unprocessed fenofibrate (approximately 20 μm) and SD-processed particles (approximately 40 μm). There was no significant difference in the effect on the particle size reduction among the selected surface-active additives. The microcomposite particles prepared with surface-active additives using SA-SD exhibited remarkable enhancement in their dissolution rate due to the synergistic effect of comparably moderate wettability improvement and significant particle size reduction. In contrast, the SD samples with the surface-active additives exhibited a decrease in dissolution rate compared to that of the unprocessed fenofibrate due to the absence of particle size reduction, although wettability was greatly improved. The results of zeta potential and XPS analyses indicated that the surface-active additive coverage on the surface layer of the SD-processed particles with a better wettability was higher than that of the SA-SD-processed composite particles. Additionally, after rapid depletion of hydrophilic additives that were excessively distributed on the surfaces of SD-processed particles, the creation of a surface layer rich in poorly water-soluble fenofibrate resulted in a decrease in the dissolution rate. In contrast, the surface-active molecules were dispersed homogeneously throughout the particle matrix in the SA-SD-processed microparticles. Furthermore, improved pharmacokinetic and pharmacodynamic characteristics were observed for the SA-SD-processed fenofibrate microparticles compared to those for the SD-processed fenofibrate particles. Therefore, the SA-SD process incorporating surface-active additives can efficiently micronize poorly water-soluble drugs and optimize their physicochemical and biopharmaceutical characteristics.
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VLE properties and the critical parameters of ternary mixture of CO2 + toluene/dichloromethane involved in the SEDS precipitation process. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116371] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Operti MC, Bernhardt A, Grimm S, Engel A, Figdor CG, Tagit O. PLGA-based nanomedicines manufacturing: Technologies overview and challenges in industrial scale-up. Int J Pharm 2021; 605:120807. [PMID: 34144133 DOI: 10.1016/j.ijpharm.2021.120807] [Citation(s) in RCA: 72] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 06/02/2021] [Accepted: 06/13/2021] [Indexed: 12/12/2022]
Abstract
Nanomedicines based on poly(lactic-co-glycolic acid) (PLGA) carriers offer tremendous opportunities for biomedical research. Although several PLGA-based systems have already been approved by both the Food and Drug Administration (FDA) and the European Medicine Agency (EMA), and are widely used in the clinics for the treatment or diagnosis of diseases, no PLGA nanomedicine formulation is currently available on the global market. One of the most impeding barriers is the development of a manufacturing technique that allows for the transfer of nanomedicine production from the laboratory to an industrial scale with proper characterization and quality control methods. This review provides a comprehensive overview of the technologies currently available for the manufacturing and analysis of polymeric nanomedicines based on PLGA nanoparticles, the scale-up challenges that hinder their industrial applicability, and the issues associated with their successful translation into clinical practice.
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Affiliation(s)
- Maria Camilla Operti
- Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, 6500 HB Nijmegen, the Netherlands; Evonik Operations GmbH, Research Development & Innovation, 64293 Darmstadt, Germany.
| | - Alexander Bernhardt
- Evonik Operations GmbH, Research Development & Innovation, 64293 Darmstadt, Germany.
| | - Silko Grimm
- Evonik Operations GmbH, Research Development & Innovation, 64293 Darmstadt, Germany.
| | - Andrea Engel
- Evonik Corporation, Birmingham Laboratories, Birmingham, AL 35211, United States.
| | - Carl Gustav Figdor
- Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, 6500 HB Nijmegen, the Netherlands.
| | - Oya Tagit
- Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, 6500 HB Nijmegen, the Netherlands.
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Karausta A, Kocaman C, Bukusoglu E. Controlling the shapes and internal complexity of the polymeric particles using liquid crystal-templates confined into microwells. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.114710] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Nikam VK, Shete SK, Khapare JP. Most promising solid dispersion technique of oral dispersible tablet. BENI-SUEF UNIVERSITY JOURNAL OF BASIC AND APPLIED SCIENCES 2020. [DOI: 10.1186/s43088-020-00086-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
AbstractBackgroundThe most common problem about conventional dosage form is dysphagia (difficulty in swallowing). So, we design a new approach in a conventional dosage form which is oral dispersible tablet. Oral dispersible tablet is also called as mouth dissolving tablet, fast dissolving tablet, or oral disintegrating tablet. Oral dispersible tablet has advantage as it quickly disintegrates into saliva when it is put on the tongue. The faster the drug disintegrates or is dissolved, the faster the absorption and the quicker the therapeutic effect of drug will be attained.Main textThis review article focuses on the progress in methods of manufacturing and various latest technologies involved in the development of oral disintegrating tablet. The solid dispersion technique is one of the novel techniques to manufacturing the oral dispersible tablet. Solid dispersion is basically a drug polymer two component system.ConclusionThis review article focuses on advantages, disadvantages, materials used as carrier for solid dispersions, methods of preparation of solid dispersion, classification of solid dispersion, promising drugs that can be incorporated into oral disintegrating tablet by solid dispersion techniques, and recent research in solid dispersion technique using polymers as carriers.
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PLA/PLGA-Based Drug Delivery Systems Produced with Supercritical CO 2-A Green Future for Particle Formulation? Pharmaceutics 2020; 12:pharmaceutics12111118. [PMID: 33233637 PMCID: PMC7699691 DOI: 10.3390/pharmaceutics12111118] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 11/16/2020] [Accepted: 11/18/2020] [Indexed: 01/12/2023] Open
Abstract
Supercritical carbon dioxide (SC-CO2) can serve as solvent, anti-solvent and solute, among others, in the field of drug delivery applications, e.g., for the formulation of polymeric nanocarriers in combination with different drug molecules. With its tunable properties above critical pressure and temperature, SC-CO2 offers control of the particle size, the particle morphology, and their drug loading. Moreover, the SC-CO2-based techniques overcome the limitations of conventional formulation techniques e.g., post purification steps. One of the widely used polymers for drug delivery systems with excellent mechanical (Tg, crystallinity) and chemical properties (controlled drug release, biodegradability) is poly (lactic acid) (PLA), which is used either as a homopolymer or as a copolymer, such as poly(lactic-co-glycolic) acid (PLGA). Over the last 30 years, extensive research has been conducted to exploit SC-CO2-based processes for the formulation of PLA carriers. This review provides an overview of these research studies, including a brief description of the SC-CO2 processes that are widely exploited for the production of PLA and PLGA-based drug-loaded particles. Finally, recent work shows progress in the development of SC-CO2 techniques for particulate drug delivery systems is discussed in detail. Additionally, future perspectives and limitations of SC-CO2-based techniques in industrial applications are examined.
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Oral Bioavailability Enhancement and Anti-Fatigue Assessment of the Andrographolide Loaded Solid Dispersion. Int J Mol Sci 2020; 21:ijms21072506. [PMID: 32260319 PMCID: PMC7177338 DOI: 10.3390/ijms21072506] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 03/26/2020] [Accepted: 04/02/2020] [Indexed: 02/05/2023] Open
Abstract
Andrographolide (AG), a major diterpene lactone isolated from Andrographis paniculata (Burm. f.) Nees (Acanthaceae), possesses a wide spectrum of biological activities. However, its poor water solubility and low bioavailability limit its clinical application. Therefore, this study aimed to develop a solid dispersion (SD) formulation to increase the aqueous solubility and dissolution rate of AG. Different drug-polymer ratios were used to prepare various SDs. The optimized formulation was characterized for differential scanning calorimetry, Fourier transform infrared spectroscopy, and powder X-ray diffraction. The analysis indicated that the optimized SD enhanced AG solubility and dissolution rates by changing AG crystallinity to an amorphous state. The dissolution behaviors of the optimum SD composed of an AG-polyvinylpyrrolidone K30-Kolliphor EL ratio of 1:7:1 (w/w/w) resulted in the highest accumulated dissolution (approximately 80%). Pharmacokinetic studies revealed that Cmax/dose and the AUC/dose increased by 3.7-fold and 3.0-fold, respectively, compared with AG suspension. Furthermore, pretreatment using the optimized AG-SD significantly increased the swimming time to exhaustion by 1.7-fold and decreased the plasma ammonia level by 71.5%, compared with the vehicle group. In conclusion, the optimized AG-SD formulation appeared to effectively improve its dissolution rate and oral bioavailability. Moreover, the optimized AG-SD provides a promising treatment against physical fatigue.
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Influence of Solvent Selection in the Electrospraying
Process of Polycaprolactone. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9030402] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Electrosprayed polycaprolactone (PCL) microparticles are widely used in medical tissueengineering, drug control release delivery, and food packaging due to their prominent structuresand properties. In electrospraying, the selection of a suitable solvent system as the carrier of PCL isfundamental and a prerequisite for the stabilization of electrospraying, and the control ofmorphology and structure of electrosprayed particles. The latter is not only critical for diversifyingthe characteristics of electrosprayed particles and achieving improvement in their properties, butalso promotes the efficiency of the process and deepens the applications of electrosprayed particlesin various fields. In order to make it systematic and more accessible, this review mainly concludesthe effects of different solution properties on the operating parameters in electrospraying on theformation of Taylor cone and the final structure as well as the morphology. Meanwhile,correlations between operating parameters and electrospraying stages are summarized as well.Finally, this review provides detailed guidance on the selection of a suitable solvent systemregarding the desired morphology, structure, and applications of PCL particles.
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Diba M, Pape B, Klymov A, Zhang Y, Song J, Löwik DWPM, Seyednejad H, Leeuwenburgh SCG. Nanostructured raspberry-like gelatin microspheres for local delivery of multiple biomolecules. Acta Biomater 2017; 58:67-79. [PMID: 28579541 DOI: 10.1016/j.actbio.2017.05.059] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Revised: 05/15/2017] [Accepted: 05/31/2017] [Indexed: 11/30/2022]
Abstract
Multicompartment particles, which are particles composed of smaller building units, have gained considerable interest during the past decade to facilitate simultaneous and differential delivery of several biomolecules in various applications. Supercritical carbon dioxide (CO2) processing is an industrial technology widely used for large-scale synthesis and processing of materials. However, the application of this technology for production of multicompartment particles from colloidal particles has not yet been explored. Here, we report the formation of raspberry-like gelatin (RLG) microparticles composed of gelatin nanoparticles as colloidal building blocks through supercritical CO2 processing. We show that these RLG microparticles exhibit a high stability upon dispersion in aqueous media without requiring chemical cross-linking. We further demonstrate that these microparticles are cytocompatible and facilitate differential release of two different model compounds. The strategy presented here can be utilized as a cost-effective route for production of various types of multicompartment particles using colloidal particles with suitable interparticle interactions. STATEMENT OF SIGNIFICANCE Multicompartment particles have gained considerable interest during the past decade to facilitate simultaneous and differential delivery of multiple biomolecules in various biomedical applications. Nevertheless, common methods employed for the production of such particles are often complex and only offer small-scale production. Here, we report the formation of raspberry-like gelatin (RLG) microparticles composed of gelatin nanoparticles as colloidal building blocks through supercritical CO2 processing. We show that these microparticles are cytocompatible and facilitate differential release of two model compounds with different molecular sizes, promising successful applications in various biomedical areas. Summarizing, this paper presents a novel strategy that can be utilized as a cost-effective route for production of various types of multicompartment particles using a wide range of colloidal building blocks.
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Affiliation(s)
- Mani Diba
- Department of Biomaterials, Radboud University Medical Center, Philips van Leydenlaan 25, 6525 EX Nijmegen, The Netherlands
| | - Bram Pape
- FeyeCon Development and Implementation B.V., Rijnkade 17A, 1382 GS Weesp, The Netherlands
| | - Alexey Klymov
- Department of Biomaterials, Radboud University Medical Center, Philips van Leydenlaan 25, 6525 EX Nijmegen, The Netherlands
| | - Yang Zhang
- Department of Biomaterials, Radboud University Medical Center, Philips van Leydenlaan 25, 6525 EX Nijmegen, The Netherlands
| | - Jiankang Song
- Department of Biomaterials, Radboud University Medical Center, Philips van Leydenlaan 25, 6525 EX Nijmegen, The Netherlands
| | - Dennis W P M Löwik
- Department of Bio-organic Chemistry, Radboud University Nijmegen, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands
| | - Hajar Seyednejad
- FeyeCon Development and Implementation B.V., Rijnkade 17A, 1382 GS Weesp, The Netherlands
| | - Sander C G Leeuwenburgh
- Department of Biomaterials, Radboud University Medical Center, Philips van Leydenlaan 25, 6525 EX Nijmegen, The Netherlands.
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Cefquinome Controlled Size Submicron Particles Precipitation by SEDS Process Using Annular Gap Nozzle. INTERNATIONAL JOURNAL OF CHEMICAL ENGINEERING 2017. [DOI: 10.1155/2017/5329257] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
An annular gap nozzle was applied in solution enhanced dispersion by supercritical fluids (SEDS) process to prepare cefquinome controlled size submicron particles so as to enhance their efficacy. Analysis results of orthogonal experiments indicated that the concentration of solution was the primary factor to affect particle sizes in SEDS process, and feeding speed of solution, precipitation pressure, and precipitation temperature ranked second to fourth. Meanwhile, the optimal operating conditions were that solution concentration was 100 mg/mL, feeding speed was 9 mL/min, precipitation pressure was 10 MPa, and precipitation temperature was 316 K. The confirmatory experiment showed that D50 of processed cefquinome particles in optimal operating conditions was 0.73 μm. Moreover, univariate effect analysis showed that the cefquinome particle size increased with the increase of concentration of the solution or precipitation pressure but decreased with the increase of solution feeding speed. When precipitation temperature increased, the cefquinome particle size showed highest point. Moreover, characterization of processed cefquinome particles was analyzed by SEM, FT-IR, and XRD. Analysis results indicated that the surface appearance of processed cefquinome particles was flakes. The chemical structure of processed cefquinome particles was not changed, and the crystallinity of processed cefquinome particles was a little lower than that of raw cefquinome particles.
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Chang CW, Wong CY, Wu YT, Hsu MC. Development of a Solid Dispersion System for Improving the Oral Bioavailability of Resveratrol in Rats. Eur J Drug Metab Pharmacokinet 2016; 42:239-249. [DOI: 10.1007/s13318-016-0339-0] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Supercritical CO2 antisolvent precipitation from biocompatible polymer solutions: A novel sustainable approach for biomaterials design and fabrication. J Supercrit Fluids 2015. [DOI: 10.1016/j.supflu.2015.03.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Wang LH, Lin ST. A predictive method for the solubility of drug in supercritical carbon dioxide. J Supercrit Fluids 2014. [DOI: 10.1016/j.supflu.2013.10.019] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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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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Shi NQ, Lei YS, Song LM, Yao J, Zhang XB, Wang XL. Impact of amorphous and semicrystalline polymers on the dissolution and crystallization inhibition of pioglitazone solid dispersions. POWDER TECHNOL 2013. [DOI: 10.1016/j.powtec.2013.06.039] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Sisson AL, Ekinci D, Lendlein A. The contemporary role of ε-caprolactone chemistry to create advanced polymer architectures. POLYMER 2013. [DOI: 10.1016/j.polymer.2013.04.045] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Sacchetin PSC, Morales AR, Moraes ÂM, Rosa PDTVE. Formation of PLA particles incorporating 17α-methyltestosterone by supercritical fluid technology. J Supercrit Fluids 2013. [DOI: 10.1016/j.supflu.2013.02.029] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Preparation and characterization of 5-fluorouracil-loaded PLLA–PEG/PEG nanoparticles by a novel supercritical CO2 technique. Int J Pharm 2012; 436:272-81. [DOI: 10.1016/j.ijpharm.2012.06.022] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2012] [Revised: 06/04/2012] [Accepted: 06/05/2012] [Indexed: 11/21/2022]
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Rämö V, Anghelescu-Hakala A, Nurmi L, Mehtiö T, Salomäki E, Härkönen M, Harlin A. Preparation of aqueous crosslinked dispersions of functionalized poly(d,l-lactic acid) with a thermomechanical method. Eur Polym J 2012. [DOI: 10.1016/j.eurpolymj.2012.06.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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22
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Hwang JS, Ko JE, Kim SH, Huh KM. Preparation and Characterization of Solid Dispersions of Eprosartan with Hydrophilic Polymers. POLYMER-KOREA 2012. [DOI: 10.7317/pk.2012.36.4.500] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Sui X, Wei W, Yang L, Zu Y, Zhao C, Zhang L, Yang F, Zhang Z. Preparation, characterization and in vivo assessment of the bioavailability of glycyrrhizic acid microparticles by supercritical anti-solvent process. Int J Pharm 2012; 423:471-9. [DOI: 10.1016/j.ijpharm.2011.12.007] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2011] [Revised: 10/26/2011] [Accepted: 12/05/2011] [Indexed: 11/16/2022]
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Kim KT, Lee JY, Lee MY, Song CK, Choi JH, Kim DD. Solid Dispersions as a Drug Delivery System. JOURNAL OF PHARMACEUTICAL INVESTIGATION 2011. [DOI: 10.4333/kps.2011.41.3.125] [Citation(s) in RCA: 15] [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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Oliveira MB, Mano JF. Polymer-based microparticles in tissue engineering and regenerative medicine. Biotechnol Prog 2011; 27:897-912. [PMID: 21584949 DOI: 10.1002/btpr.618] [Citation(s) in RCA: 123] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2010] [Revised: 03/21/2011] [Indexed: 12/11/2022]
Abstract
Different types of biomaterials, processed into different shapes, have been proposed as temporary support for cells in tissue engineering (TE) strategies. The manufacturing methods used in the production of particles in drug delivery strategies have been adapted for the development of microparticles in the fields of TE and regenerative medicine (RM). Microparticles have been applied as building blocks and matrices for the delivery of soluble factors, aiming for the construction of TE scaffolds, either by fusion giving rise to porous scaffolds or as injectable systems for in situ scaffold formation, avoiding complicated surgery procedures. More recently, organ printing strategies have been developed by the fusion of hydrogel particles with encapsulated cells, aiming the production of organs in in vitro conditions. Mesoscale self-assembly of hydrogel microblocks and the use of leachable particles in three-dimensional (3D) layer-by-layer (LbL) techniques have been suggested as well in recent works. Along with innovative applications, new perspectives are open for the use of these versatile structures, and different directions can still be followed to use all the potential that such systems can bring. This review focuses on polymeric microparticle processing techniques and overviews several examples and general concepts related to the use of these systems in TE and RE applications. The use of materials in the development of microparticles from research to clinical applications is also discussed.
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Affiliation(s)
- Mariana B Oliveira
- 3Bs Research Group-Biomaterials, Biodegradables and Biomimetics, University of Minho, AvePark, Zona Industrial da Gandra, S. Cláudio do Barco, Caldas das Taipas, Guimarães 4806-909, Portugal
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Kim MJ, Park MY, Lee YC, Lee J. Particle size reduction of water-insoluble drug in water-assisted extrusion of hydroxypropyl methyl cellulose. Macromol Res 2011. [DOI: 10.1007/s13233-011-0110-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Furlan M, Kluge J, Mazzotti M, Lattuada M. Preparation of biocompatible magnetite–PLGA composite nanoparticles using supercritical fluid extraction of emulsions. J Supercrit Fluids 2010. [DOI: 10.1016/j.supflu.2010.05.010] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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28
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Elkharraz K, Dashevsky A, Bodmeier R. Microparticles prepared by grinding of polymeric films. J Microencapsul 2010. [DOI: 10.3109/02652040309178354] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- K. Elkharraz
- College of Pharmacy, Freie Universität Berlin, Kelchstr. 31, 12169, Berlin, Germany
| | - A. Dashevsky
- College of Pharmacy, Freie Universität Berlin, Kelchstr. 31, 12169, Berlin, Germany
| | - R. Bodmeier
- College of Pharmacy, Freie Universität Berlin, Kelchstr. 31, 12169, Berlin, Germany
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Production of PLGA micro- and nanocomposites by supercritical fluid extraction of emulsions: I. Encapsulation of lysozyme. J Supercrit Fluids 2009. [DOI: 10.1016/j.supflu.2009.05.010] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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30
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Boutin O, Petit-Gas T, Badens E. Powder Micronization Using a CO2 Supercritical Antisolvent Type Process: Comparison of Different Introduction Devices. Ind Eng Chem Res 2009. [DOI: 10.1021/ie8017803] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Olivier Boutin
- Aix Marseille Universités, UMR-CNRS 6181, Modélisation, Mécanique et Procédés Propres, Europôle de l’Arbois BP 80 13545 Aix en Provence Cedex 4 France
| | - Thomas Petit-Gas
- Aix Marseille Universités, UMR-CNRS 6181, Modélisation, Mécanique et Procédés Propres, Europôle de l’Arbois BP 80 13545 Aix en Provence Cedex 4 France
| | - Elisabeth Badens
- Aix Marseille Universités, UMR-CNRS 6181, Modélisation, Mécanique et Procédés Propres, Europôle de l’Arbois BP 80 13545 Aix en Provence Cedex 4 France
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31
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Hong HL, Suo QL, Han LM, Li CP. Study on Precipitation of Astaxanthin in Supercritical Fluid. POWDER TECHNOL 2009. [DOI: 10.1016/j.powtec.2008.10.022] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Chen AZ, Li Y, Chen D, Hu JY. Development of core-shell microcapsules by a novel supercritical CO2 process. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2009; 20:751-758. [PMID: 18987946 DOI: 10.1007/s10856-008-3633-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2008] [Accepted: 10/16/2008] [Indexed: 05/27/2023]
Abstract
5-fluorouracil-SiO(2)-poly(L-lactide) (5-Fu-SiO(2)-PLLA) microcapsules were prepared in a novel process of solution-enhanced dispersion by supercritical CO(2) (SEDS). The SiO(2) nanoparticles were loaded with 5-Fu by adsorption at the first place, then the 5-Fu-SiO(2) nanoparticles were coated with PLLA by a modified SEDS process. The resulted microcapsules were characterized by scanning electron microscope (SEM), laser diffraction particle size analyzer, Fourier transform infrared spectrometer (FTIR) and thermogravimeter-differential scanning calorimeter (TG-DSC). The drug load, encapsulation efficiency and drug release profiles were also determined. The resulted microcapsules exhibited a rather spherical shape, smooth surface, and a narrow particle size distribution with a mean particle size of 536 nm. The drug load and encapsulation efficiency of the samples were 0.18% and 80.53%, respectively, 25.05% of 5-Fu was released in the first half hour, then drug released in a sustained process, which was much slower than that of without coated by PLLA. The results indicated that the modified SEDS process could be used to produce drug-polymer microcapsules with a core-shell structure, high encapsulation efficiency and sustained drug release effect.
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Affiliation(s)
- Ai-Zheng Chen
- Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
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Puapermpoonsiri U, Spencer J, van der Walle CF. A freeze-dried formulation of bacteriophage encapsulated in biodegradable microspheres. Eur J Pharm Biopharm 2008; 72:26-33. [PMID: 19118627 DOI: 10.1016/j.ejpb.2008.12.001] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2008] [Revised: 11/24/2008] [Accepted: 12/02/2008] [Indexed: 11/24/2022]
Abstract
With the emergence of widespread antibiotic resistance, there has been renewed interest in the use of bacteriophages. While their potency, safety and specificity have underpinned their clinical potential, to date, little work has been focussed on their formulation with respect to controlled release and/or passive targeting. Here, we show that bacteriophages selective for Staphylococcus aureus or Pseudomonas aeruginosa can be encapsulated into biodegradable polyester microspheres via a modified w/o/w double emulsion-solvent extraction protocol with only a partial loss of lytic activity. Loss of lytic activity could be attributed to the exposure of the bacteriophages to the water-dichloromethane interface, with the lyophilization process itself having little effect. The microspheres were engineered to have an appropriate size and density to facilitate inhalation via a dry-powder inhaler and fluorescently labeled bacteriophages were distributed entirely within the internal porous matrix. The release profile showed a burst release phase (55-63% release within 30 min), followed by a sustained release till around 6h, as appropriate for pulmonary delivery. Despite the poor shelf-life of the formulation, the work is proof-of-concept for the formulation and controlled delivery of bacteriophages, as suitable for the treatment of bacterial lung infections.
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Affiliation(s)
- U Puapermpoonsiri
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow, UK
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Abstract
Microporous poly(D,L-lactide-co-glycolide) matrices containing encapsulated proteins were fabricated in a solvent-free manner. Microporous foam was generated by saturating a mixture of polymer and protein particles in supercritical carbon dioxide (SC-CO2), dispersing the protein particles in the polymer melt followed by a rapid evaporation of the CO2 phase. The release rates of protein encapsulated within porous poly(lactide-co-glycolide)(PLGA) constructs produced in SC-CO2 were measured in vitro. Although a substantial amount of protein was released within the first 48 h, results indicated that protein may be dispersed throughout the polymer phase and released over 3 weeks using this solvent-free technique. Basic fibroblast growth factor (bFGF), known to promote angiogenesis in vivo, was encapsulated within the polymer matrix. In addition, retention of biological activity was measured for bFGF encapsulated within PLGA foams. Encapsulated bFGF was released from the porous constructs for up to 10 days in vitro with little loss of biological activity.
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Affiliation(s)
- David D Hile
- Texas A&M University, Department of Chemical Engineering, College Station, Texas, USA
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Li Y, Yang DJ, Chen SL, Chen SB, Chan ASC. Process parameters and morphology in puerarin, phospholipids and their complex microparticles generation by supercritical antisolvent precipitation. Int J Pharm 2008; 359:35-45. [DOI: 10.1016/j.ijpharm.2008.03.022] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2007] [Revised: 01/25/2008] [Accepted: 03/15/2008] [Indexed: 10/22/2022]
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36
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Preparation of PLLA/PLGA microparticles using solution enhanced dispersion by supercritical fluids (SEDS). J Colloid Interface Sci 2008; 322:87-94. [DOI: 10.1016/j.jcis.2008.02.031] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2007] [Revised: 02/22/2008] [Accepted: 02/24/2008] [Indexed: 11/21/2022]
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37
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Davies OR, Lewis AL, Whitaker MJ, Tai H, Shakesheff KM, Howdle SM. Applications of supercritical CO2 in the fabrication of polymer systems for drug delivery and tissue engineering. Adv Drug Deliv Rev 2008; 60:373-87. [PMID: 18069079 DOI: 10.1016/j.addr.2006.12.001] [Citation(s) in RCA: 227] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2006] [Accepted: 12/14/2006] [Indexed: 11/26/2022]
Abstract
Supercritical CO(2) has the potential to be an excellent environment within which controlled release polymers and dry composites may be formed. The low temperature and dry conditions within the fluid offer obvious advantages in the processing of water, solvent or heat labile molecules. The low viscosity and high diffusivity of scCO(2) offer the possibility of novel processing routes for polymer drug composites, but there are still technical challenges to overcome. Moreover, the low solubility of most drug molecules in scCO(2) presents both challenges and advantages. This review explores the current methods that use high pressure and scCO(2) for the production of drug delivery systems and the more specialized application of the fluid in the formation of highly porous tissue engineering scaffolds.
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Chen AZ, Pu XM, Kang YQ, Liao L, Yao YD, Yin GF. Study of poly(L-lactide) microparticles based on supercritical CO2. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2007; 18:2339-45. [PMID: 17569002 DOI: 10.1007/s10856-007-3173-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2006] [Accepted: 09/13/2006] [Indexed: 05/15/2023]
Abstract
Poly(L-lactide) (PLLA) microparticles were prepared in supercritical anti-solvent process. The effects of several key factors on surface morphology, and particle size and particle size distribution were investigated. These factors included initial drops size, saturation ratio of PLLA solution, pressure, temperature, concentration of the organic solution, the flow rate of the solution and molecular weight of PLLA. The results indicated that the saturation ratio of PLLA solution, concentration of the organic solution and flow rate of the solution played important roles on the properties of products. Various microparticles with the mean particle size ranging from 0.64 to 6.64 microm, could be prepared by adjusting the operational parameters. Fine microparticles were obtained in a process namely solution-enhanced dispersion by supercritical fluids (SEDS) process with dichloromethane/acetone mixture as solution.
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Affiliation(s)
- Ai-Zheng Chen
- College of Materials Science and Engineering, Sichuan University, Chengdu, 610064 Sichuan, China
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Vasconcelos T, Sarmento B, Costa P. Solid dispersions as strategy to improve oral bioavailability of poor water soluble drugs. Drug Discov Today 2007; 12:1068-75. [PMID: 18061887 DOI: 10.1016/j.drudis.2007.09.005] [Citation(s) in RCA: 991] [Impact Index Per Article: 58.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2007] [Revised: 09/05/2007] [Accepted: 09/14/2007] [Indexed: 11/24/2022]
Abstract
Solid dispersions are one of the most promising strategies to improve the oral bioavailability of poorly water soluble drugs. By reducing drug particle size to the absolute minimum, and hence improving drug wettability, bioavailability may be significantly improved. They are usually presented as amorphous products, mainly obtained by two major different methods, for example, melting and solvent evaporation. Recently, surfactants have been included to stabilize the formulations, thus avoiding drug recrystallization and potentiating their solubility. New manufacturing processes to obtain solid dispersions have also been developed to reduce the drawbacks of the initial process. In this review, it is intended to discuss the recent advances related on the area of solid dispersions.
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Affiliation(s)
- Teófilo Vasconcelos
- Department of Pharmaceutical Technology, Faculty of Pharmacy, University of Porto, Rua Aníbal Cunha 164, 4050-047 Porto, Portugal.
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40
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Li Y, Yang DJ, Chen SL, Chen SB, Chan ASC. Comparative Physicochemical Characterization of Phospholipids Complex of Puerarin Formulated by Conventional and Supercritical Methods. Pharm Res 2007; 25:563-77. [PMID: 17828444 DOI: 10.1007/s11095-007-9418-x] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2007] [Accepted: 07/20/2007] [Indexed: 12/17/2022]
Abstract
PURPOSE The aim of this work was to compare the physicochemical characteristics of the phospholipids complex of puerarin (Pur) prepared by traditional methods (solvent evaporation, freeze-drying and micronization) and a supercritical fluid (SCF) technology. The physicochemical properties of the pure drug and the corresponding products prepared by two different SCF methods were also compared. METHODS Solid-state characterization of particles included differential scanning calorimetry (DSC), X-ray powder diffraction (XRPD), solubility, dissolution rate and scanning electron microscopy (SEM) examinations. Besides puerarin phospholipids complex (PPC) by four different methods, the solid-state properties of unprocessed, gas antisolvent (GAS) crystallized and solution enhanced dispersion by supercritical fluid (SEDS) precipitated puerarin samples were also compared. Crystallinity was assessed using DSC and XRPD. Drug-phospholipids interactions were characterized using Fourier transform infrared spectroscopy (FTIR). SEM was used to determine any morphological changes. Pharmaceutical performance was assessed in dissolution rate and solubility tests. RESULT The results of the physical characterization attested a substantial correspondence of the solid state of the drug before and after treatment with GAS technique, whereas a pronounced change in size and morphology of the drug crystals was noticed. The GAS-processed puerarin exhibited a better crystal shape confirmed by DSC, XRPD and IR. Polymorphic change of puerarin during SEDS coupled with the dramatic reduction of the dimensions determined a remarkable enhancement of its solubility and in vitro dissolution rate. Phospholipids complex prepared using supercritical fluid technology showed similar properties of physical state, thermal stability and molecular interaction with phospholipids (PC) to those of corresponding systems prepared by other three conventional methods namely solvent evaporation, freeze-drying and micronization as proved by XRPD, DSC, and FTIR. The best dissolution rate was obtained by SEDS-prepared complex, while the highest solubility was obtained for solvent evaporation method. CONCLUSION Supercritical fluid technology for the preparation of puerarin and its phospholipids complex has been proven to have significant advantages over the solvent evaporation technique and other conventional methods.
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Affiliation(s)
- Ying Li
- Shanghai Jiao Tong University, Shanghai, PR China
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41
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Hong HL, Suo QL, He WZ, Li CP. Formation of Carotene/Proanthocyanidin Composite Microparticles via the Solution-Enhanced Dispersion by Supercritical Fluids (SEDS) Process through Prefilming Atomization. Ind Eng Chem Res 2007. [DOI: 10.1021/ie070590a] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hai Long Hong
- Chemical Engineering College, Inner Mongolia University of Technology, Hohhot 010051, People's Republic of China
| | - Quan Ling Suo
- Chemical Engineering College, Inner Mongolia University of Technology, Hohhot 010051, People's Republic of China
| | - Wen Zhi He
- Chemical Engineering College, Inner Mongolia University of Technology, Hohhot 010051, People's Republic of China
| | - Chun Ping Li
- Chemical Engineering College, Inner Mongolia University of Technology, Hohhot 010051, People's Republic of China
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42
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Micronization of the officinal component baicalin by SEDS-PA process. CRYSTAL RESEARCH AND TECHNOLOGY 2007. [DOI: 10.1002/crat.200610876] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Miller DA, McConville JT, Yang W, Williams RO, McGinity JW. Hot-melt extrusion for enhanced delivery of drug particles. J Pharm Sci 2007; 96:361-76. [PMID: 17075869 DOI: 10.1002/jps.20806] [Citation(s) in RCA: 118] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
With the recent advent of nanotechnology for pharmaceutical applications, drug particle engineering is the focus of increasing interest as a viable approach for overcoming solubility limitations of poorly water-soluble drugs. Although these particle engineering techniques have been proven successful for enhancing the dissolution properties of many poorly water-soluble drugs, there are limitations associated with them such as particle aggregation, morphological instability, and poor wettability. The aim of this study was to demonstrate a processing technique in which hot-melt extrusion (HME) is utilized to overcome these limitations. Micronized particles of amorphous itraconazole (ITZ) stabilized with PVP or HPMC were produced and subsequently melt extruded with poloxamer 407 and PEO 200 M to deaggregate and disperse the particles into the hydrophilic polymer matrix. Differential scanning calorimetry, X-ray diffraction, and scanning electron microscopy were used to demonstrate that the HME process did not alter the properties of the micronized particles. Dissolution testing conducted at sink conditions revealed that the dissolution rate of the micronized particles was improved by HME due to particle deaggregation and enhanced wetting. Supersaturation dissolution testing demonstrated that the ITZ-HPMC micronized particle extrudates provided superior supersaturation of ITZ compared to the ITZ-PVP micronized particle extrudates. Supersaturation dissolution testing incorporating a pH change (from pH 1.2 to 6.8 at 2 h) revealed that neither micronized particle extrudate formulation significantly reduced the rate of ITZ precipitation from supersaturated solution once pH was increased. Moreover, the two extrudate formulations performed very similarly when only considering dissolution testing from just before pH adjustment through the duration of testing at neutral pH. From oral dosing of rats, it was determined that the two extrudate formulations performed similarly in vivo as confirmed by their statistically equivalent AUC values. By correlating the results of supersaturation dissolution testing with pH change to the in vivo AUC, it appears that rapid precipitation of ITZ occurs upon entrance into the more neutral pH environment of the small intestine resulting in a brief opportunity for absorption. This suggests that perhaps the optimum formulation approach for ITZ is to control drug release so as to retard precipitation as pH is increased and extend the absorption window in the small intestine.
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Affiliation(s)
- Dave A Miller
- College of Pharmacy, University of Texas at Austin, Austin, Texas 78712, USA
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44
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Boutin O, Maruejouls C, Charbit G. A new system for particle formation using the principle of the SAS process: The Concentric Tube Antisolvent Reactor (CTAR). J Supercrit Fluids 2007. [DOI: 10.1016/j.supflu.2006.07.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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45
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Reverchon E, Antonacci A. Polymer microparticles production by supercritical assisted atomization. J Supercrit Fluids 2007. [DOI: 10.1016/j.supflu.2006.03.005] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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46
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Silva GA, Ducheyne P, Reis RL. Materials in particulate form for tissue engineering. 1. Basic concepts. J Tissue Eng Regen Med 2007; 1:4-24. [DOI: 10.1002/term.2] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Chen AZ, Pu XM, Kang YQ, Liao L, Yao YD, Yin GF. Preparation of 5-Fluorouracil-Poly(L-lactide) Microparticles Using Solution-Enhanced Dispersion by Supercritical CO2. Macromol Rapid Commun 2006. [DOI: 10.1002/marc.200600221] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Lee S, Nam K, Kim MS, Jun SW, Park JS, Woo JS, Hwang SJ. Preparation and characterization of solid dispersions of itraconazole by using aerosol solvent extraction system for improvement in drug solubility and bioavailability. Arch Pharm Res 2006; 28:866-74. [PMID: 16114503 DOI: 10.1007/bf02977355] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The objective of this study was to elucidate the feasibility to improve the solubility and bioavailability of poorly water-soluble itraconazole via solid dispersions by using supercritical fluid (SCF). Solid dispersions of itraconazole with hydrophilic polymer, HPMC 2910, were prepared by the aerosol solvent extraction system (ASES) under different process conditions of temperature/pressure. The particle size of solid dispersions ranged from 100 to 500 nm. The equilibrium solubility increased with decrease (15 to 10 MPa) in pressure and increase (40 to 60 degrees C) in temperature. The solid dispersions prepared at 45 degrees C/15 MPa showed a slight increase in equilibrium solubility (approximately 27-fold increase) when compared to pure itraconazole, while those prepared at 60 degrees C/10 MPa showed approximately 610-fold increase and no endothermic peaks corresponding to pure itraconazole were observed, indicating that itraconazole might be molecularly dispersed in HPMC 2910 in the amorphous form. The amorphous state of itraconazole was confirmed by DSC/XRD data. The pharmacokinetic parameters of the ASES-processed solid dispersions, such as Tmax, Cmax, and AUC(o-24 h) were almost similar to Sporanox capsule which shows high bioavailability. Hence, it was concluded that the ASES process could be a promising technique to reduce particle size and/or prepare amorphous solid dispersion of drugs in order to improve the solubility and bioavailability of poorly water-soluble drugs.
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Affiliation(s)
- Sibeum Lee
- National Research Laboratory of Pharmaceutical Technology, College of Pharmacy, Chungnam National University, Daejeon 305-764, Korea
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Muhrer G, Meier U, Fusaro F, Albano S, Mazzotti M. Use of compressed gas precipitation to enhance the dissolution behavior of a poorly water-soluble drug: Generation of drug microparticles and drug–polymer solid dispersions. Int J Pharm 2006; 308:69-83. [PMID: 16324806 DOI: 10.1016/j.ijpharm.2005.10.026] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2005] [Revised: 10/18/2005] [Accepted: 10/20/2005] [Indexed: 10/25/2022]
Abstract
The classical anticonvulsant drug phenytoin (5,5-diphenyl hydantoin, C(15)H(12)N(2)O(2)) has been used as a model compound to investigate the possibility of enhancing the dissolution rate of poorly water-soluble drugs using dense gas antisolvent techniques. In a first step, microcrystals of neat phenytoin have been generated using the gas antisolvent (GAS) and precipitation with compressed antisolvent (PCA) processes, thereby assessing process performances and elucidating similarities and differences between the two techniques. In a second step, the PCA process has been used to generate solid dispersions of phenytoin in the hydrophilic polymer poly(vinyl-pyrrolidone)-K30 (PVP). In vitro dissolution results reveal a substantially better performance of the PCA-processed co-formulations compared to unprocessed phenytoin and to GAS- and PCA-precipitates of neat drug crystals. A comparison of the product quality of phenytoin-PVP co-formulations with solid dispersions obtained by spray drying convincingly underlines the potential of dense gas antisolvent techniques for the production of pharmaceutical formulations with enhanced oral bioavailability.
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Affiliation(s)
- Gerhard Muhrer
- Novartis Pharma AG, Chemical & Analytical Development, CH-4002 Basel, Switzerland
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