401
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Kunda NK, Somavarapu S, Gordon SB, Hutcheon GA, Saleem IY. Nanocarriers targeting dendritic cells for pulmonary vaccine delivery. Pharm Res 2012; 30:325-41. [PMID: 23054093 DOI: 10.1007/s11095-012-0891-5] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2012] [Accepted: 09/18/2012] [Indexed: 12/27/2022]
Abstract
Pulmonary vaccine delivery has gained significant attention as an alternate route for vaccination without the use of needles. Immunization through the pulmonary route induces both mucosal and systemic immunity, and the delivery of antigens in a dry powder state can overcome some challenges such as cold-chain and availability of medical personnel compared to traditional liquid-based vaccines. Antigens formulated as nanoparticles (NPs) reach the respiratory airways of the lungs providing greater chance of uptake by relevant immune cells. In addition, effective targeting of antigens to the most 'professional' antigen presenting cells (APCs), the dendritic cells (DCs) yields an enhanced immune response and the use of an adjuvant further augments the generated immune response thus requiring less antigen/dosage to achieve vaccination. This review discusses the pulmonary delivery of vaccines, methods of preparing NPs for antigen delivery and targeting, the importance of targeting DCs and different techniques involved in formulating dry powders suitable for inhalation.
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Affiliation(s)
- Nitesh K Kunda
- Formulation and Drug Delivery Research School of Pharmacy and Biomolecular Science, Liverpool John Moores University, James Parsons Building, Byrom Street, Liverpool, L3 3AF, UK
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402
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Burapapadh K, Takeuchi H, Sriamornsak P. Novel pectin-based nanoparticles prepared from nanoemulsion templates for improving in vitro dissolution and in vivo absorption of poorly water-soluble drug. Eur J Pharm Biopharm 2012; 82:250-61. [DOI: 10.1016/j.ejpb.2012.07.010] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2012] [Revised: 06/11/2012] [Accepted: 07/16/2012] [Indexed: 11/28/2022]
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403
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404
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Shen H, Banerjee AA, Mlynarska P, Hautman M, Hong S, Kapetanovic IM, Lyubimov AV, Liu Y. Enhanced oral bioavailability of a cancer preventive agent (SR13668) by employing polymeric nanoparticles with high drug loading. J Pharm Sci 2012; 101:3877-85. [DOI: 10.1002/jps.23269] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2012] [Revised: 06/18/2012] [Accepted: 06/29/2012] [Indexed: 12/30/2022]
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405
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Domaratzki RE, Ghanem A. Encapsulation and release of cladribine from chitosan nanoparticles. J Appl Polym Sci 2012. [DOI: 10.1002/app.38354] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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406
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Mitri K, Vauthier C, Huang N, Menas A, Ringard-Lefebvre C, Anselmi C, Stambouli M, Rosilio V, Vachon JJ, Bouchemal K. Scale-up of nanoemulsion produced by emulsification and solvent diffusion. J Pharm Sci 2012; 101:4240-7. [PMID: 22886515 DOI: 10.1002/jps.23291] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2012] [Revised: 06/25/2012] [Accepted: 07/20/2012] [Indexed: 11/06/2022]
Abstract
The scale-up of nanoemulsions (NEs) produced by emulsification and solvent diffusion process was successfully achieved in the present work. Up to 1500 mL of NEs were produced with olive oil, castor oil, almond oil, or Arlamol™ E by using a Y-shaped mixer device. NE droplet sizes were significantly modulated from 290 to 185 nm by changing the process parameters without modification of the formulation composition. Smaller NE droplet sizes were obtained by (1) decreasing the internal diameter of the Y-mixer from 5 to 0.8 mm, (2) increasing the flow rates of the organic and the aqueous phases upon mixing, and (3) increasing the temperature of the experiment from 5°C to 40°C. All the results of NE diameters (d(sc) ) expressed as a function of the Reynolds number (Re) and the shear rate inside the Y-mixer (\documentclass{article}\usepackage{amssymb}\begin{document}\pagestyle{empty}$\dot \gamma$\end{document}) showed the existence of typical power-law relationships: d(sc) = 10(2.82) Re(- 0.14) and \documentclass{article}\usepackage{amssymb}\begin{document}\pagestyle{empty}$d_{{\rm sc}} = 10^{2.60} \dot \gamma ^{- 0.06}$\end{document}, respectively. The existence of these power-laws for NE formation by emulsification and solvent diffusion process has never been reported in the literature yet and constitutes a new finding in this work. We definitely proved that the high turbulences created upon NE formation are the most important parameter allowing to decrease droplet size.
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Affiliation(s)
- Khalil Mitri
- Université Paris-Sud, Faculté de Pharmacie, UMR CNRS 8612, Institut Galien Paris-Sud, Châtenay-Malabry Cedex 92296, France
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407
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Vollrath A, Pretzel D, Pietsch C, Perevyazko I, Schubert S, Pavlov GM, Schubert US. Preparation, Cellular Internalization, and Biocompatibility of Highly Fluorescent PMMA Nanoparticles. Macromol Rapid Commun 2012; 33:1791-7. [DOI: 10.1002/marc.201200329] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2012] [Revised: 06/28/2012] [Indexed: 01/08/2023]
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408
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PLGA nanoparticles and nanosuspensions with amphotericin B: Potent in vitro and in vivo alternatives to Fungizone and AmBisome. J Control Release 2012; 161:795-803. [DOI: 10.1016/j.jconrel.2012.05.037] [Citation(s) in RCA: 111] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2012] [Revised: 05/16/2012] [Accepted: 05/20/2012] [Indexed: 11/23/2022]
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409
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de la Rica R, Aili D, Stevens MM. Enzyme-responsive nanoparticles for drug release and diagnostics. Adv Drug Deliv Rev 2012; 64:967-78. [PMID: 22266127 DOI: 10.1016/j.addr.2012.01.002] [Citation(s) in RCA: 464] [Impact Index Per Article: 38.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2011] [Revised: 01/05/2012] [Accepted: 01/09/2012] [Indexed: 12/20/2022]
Abstract
Enzymes are key components of the bionanotechnology toolbox that possess exceptional biorecognition capabilities and outstanding catalytic properties. When combined with the unique physical properties of nanomaterials, the resulting enzyme-responsive nanoparticles can be designed to perform functions efficiently and with high specificity for the triggering stimulus. This powerful concept has been successfully applied to the fabrication of drug delivery schemes where the tissue of interest is targeted via release of cargo triggered by the biocatalytic action of an enzyme. Moreover, the chemical transformation of the carrier by the enzyme can also generate therapeutic molecules, therefore paving the way to design multimodal nanomedicines with synergistic effects. Dysregulation of enzymatic activity has been observed in a number of severe pathological conditions, and this observation is useful not only to program drug delivery in vivo but also to fabricate ultrasensitive sensors for diagnosing these diseases. In this review, several enzyme-responsive nanomaterials such as polymer-based nanoparticles, liposomes, gold nanoparticles and quantum dots are introduced, and the modulation of their physicochemical properties by enzymatic activity emphasized. When known, toxicological issues related to the utilization nanomaterials are highlighted. Key examples of enzyme-responsive nanomaterials for drug delivery and diagnostics are presented, classified by the type of effector biomolecule, including hydrolases such as proteases, lipases and glycosidases, and oxidoreductases.
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410
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Following the concentration of polymeric nanoparticles during nebulization. Pharm Res 2012; 30:16-24. [PMID: 22806406 DOI: 10.1007/s11095-012-0819-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2012] [Accepted: 06/20/2012] [Indexed: 12/28/2022]
Abstract
PURPOSE Nebulization represents one strategy to achieve pulmonary deposition of biodegradable nanoparticles. Besides stability as a key requirement to maintain functionality, the output of nanoparticles from the nebulizer needs to be considered to facilitate an efficient pulmonary therapy. METHODS Formulations nebulized by air-jet and vibrating-membrane technology were analyzed for their aerodynamic characteristics by laser diffraction. The nebulization stability of poly(D,L-lactide-co-glycolide) nanoparticles was assessed by dynamic light scattering. Moreover, several methods were employed to account for the shift in solute and NP reservoir concentration during nebulization. RESULTS Regardless of the formulation or nebulizer used generated aerosols all showed aerodynamic characteristics suitable for deep lung deposition. However, nanoparticles were prone to aggregation and concentrated during air-jet nebulization. The particle concentration effect was significantly pronounced in comparison to molecular solutes under the same nebulization conditions, due to nanoparticle aggregation and subsequent particle remainder in the reservoir. In contrast, vibrating-membrane technology did not affect nanoparticle integrity and reservoir concentration during nebulization, as the unaffected submicron particles passed through the tapered holes of the actuated plate. CONCLUSIONS Aggregation and concentration effects during air-jet nebulization emphasize that nanosuspensions should preferably be delivered with a suitable vibrating-membrane device in order to ensure an effective pulmonary application.
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411
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Domingo C, Saurina J. An overview of the analytical characterization of nanostructured drug delivery systems: towards green and sustainable pharmaceuticals: a review. Anal Chim Acta 2012; 744:8-22. [PMID: 22935368 DOI: 10.1016/j.aca.2012.07.010] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2012] [Revised: 07/06/2012] [Accepted: 07/09/2012] [Indexed: 10/28/2022]
Abstract
The analytical characterization of drug delivery systems prepared by means of green manufacturing technologies using CO(2) as a processing fluid is here reviewed. The assessment of the performance of nanopharmaceuticals designed for controlled drug release may result in a complex analytical issue and multidisciplinary studies focused on the evaluation of physicochemical, morphological and textural properties of the products may be required. The determination of the drug content as well as the detection of impurities and solvent residues are often carried out by chromatography. Assays on solid state samples relying on X-ray, vibrational and nuclear magnetic resonance spectroscopies are of great interests to study the composition and structure of pharmaceutical forms. The morphology and size of particles are commonly checked by microscopy and complementary chemical information can be extracted in combination with spectroscopic accessories. Regarding the thermal behavior, calorimetric and thermogravimetric techniques are applied to assess the thermal transitions and stability of the samples. The evaluation of drug release profiles from the nanopharmaceuticals can be based on various experimental set-ups depending on the administration route to be considered. Kinetic curves showing the evolution of the drug concentration as a function of time in various physiological conditions (e.g., gastric, plasmatic or topical) are recorded commonly by UV-vis spectroscopy and/or chromatography. Representative examples are commented in detail to illustrate the characterization strategies.
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Affiliation(s)
- Concepción Domingo
- Instituto de Ciencia de Materiales de Barcelona (CSIC), Campus de la UAB s/n, 08193 Bellaterra, Spain
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412
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Marchiori MCL, Rascovetzki RH, Ourique AF, Rigo LA, Silva CB, Beck RCR. Improved tretinoin photostability in a topical nanomedicine replacing original liquid suspension with spray-dried powder with no loss of effectiveness. Drug Dev Ind Pharm 2012; 39:579-86. [DOI: 10.3109/03639045.2012.691510] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- M. C. L. Marchiori
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal de Santa Maria,
Santa Maria, RS, Brazil
| | - R. H. Rascovetzki
- Curso de Farmácia, Centro de Ciências da Saúde, Universidade Federal de Santa Maria,
Santa Maria, RS, Brazil
| | - A. F. Ourique
- Programa de Pós-Graduação em Nanotecnologia Farmacêutica, Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul,
Porto Alegre, RS, Brazil
| | - L. A. Rigo
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal de Santa Maria,
Santa Maria, RS, Brazil
| | - C. B. Silva
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal de Santa Maria,
Santa Maria, RS, Brazil
| | - R. C. R. Beck
- Programa de Pós-Graduação em Nanotecnologia Farmacêutica, Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul,
Porto Alegre, RS, Brazil
- Programa de Pós-Graduação em Ciências Farmacêuticas, Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul,
Porto Alegre, RS, Brazil
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413
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Wu ZM, Ling L, Zhou LY, Guo XD, Jiang W, Qian Y, Luo KQ, Zhang LJ. Novel preparation of PLGA/HP55 nanoparticles for oral insulin delivery. NANOSCALE RESEARCH LETTERS 2012; 7:299. [PMID: 22682064 PMCID: PMC3436866 DOI: 10.1186/1556-276x-7-299] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/29/2011] [Accepted: 06/08/2012] [Indexed: 06/01/2023]
Abstract
The aim of the present study was to develop the PLGA/HP55 nanoparticles with improved hypoglycemic effect for oral insulin delivery. The insulin-loaded PLGA/HP55 nanoparticles were produced by a modified multiple emulsion solvent evaporation method. The physicochemical characteristics, in vitro release of insulin, and in vivo efficacy in diabetic rats of the nanoparticles were evaluated. The insulin encapsulation efficiency was up to 94%, and insulin was released in a pH-dependent manner under simulated gastrointestinal conditions. When administered orally (50 IU/kg) to diabetic rats, the nanoparticles can decrease rapidly the blood glucose level with a maximal effect between 1 and 8 h. The relative bioavailability compared with subcutaneous injection (5 IU/kg) in diabetic rats was 11.3% ± 1.05%. This effect may be explained by the fast release of insulin in the upper intestine, where it is better absorbed by the high gradient concentration of insulin than other regions. These results show that the PLGA/HP55 nanoparticles developed in the study might be employed as a potential method for oral insulin delivery.
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Affiliation(s)
- Zhi Min Wu
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, People’s Republic of China
| | - Li Ling
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, People’s Republic of China
| | - Li Ying Zhou
- Department of Chemical and Bio-molecular Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Xin Dong Guo
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, People’s Republic of China
| | - Wei Jiang
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, People’s Republic of China
| | - Yu Qian
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, People’s Republic of China
| | - Kathy Qian Luo
- Division of Bioengineering, School of Chemical and Biomedical Engineering, Nanyang Technological University, 70 Nanyang Drive, 637457, Singapore
| | - Li Juan Zhang
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, People’s Republic of China
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414
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Youm I, Murowchick JB, Youan BBC. Entrapment and release kinetics of furosemide from pegylated nanocarriers. Colloids Surf B Biointerfaces 2012; 94:133-42. [DOI: 10.1016/j.colsurfb.2012.01.027] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2011] [Revised: 12/20/2011] [Accepted: 01/21/2012] [Indexed: 10/14/2022]
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415
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Auto-associative amphiphilic polysaccharides as drug delivery systems. Drug Discov Today 2012; 17:608-14. [DOI: 10.1016/j.drudis.2012.01.016] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2011] [Revised: 01/06/2012] [Accepted: 01/19/2012] [Indexed: 11/18/2022]
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416
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Solid lipid nanoparticles: Continuous and potential large-scale nanoprecipitation production in static mixers. Colloids Surf B Biointerfaces 2012; 94:68-72. [DOI: 10.1016/j.colsurfb.2012.01.018] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2011] [Revised: 01/13/2012] [Accepted: 01/16/2012] [Indexed: 11/22/2022]
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417
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Perevyazko IY, Vollrath A, Pietsch C, Schubert S, Pavlov GM, Schubert US. Nanoprecipitation of poly(methyl methacrylate)‐based nanoparticles: Effect of the molar mass and polymer behavior. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/pola.26071] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Igor Y. Perevyazko
- Laboratory of Organic and Macromolecular Chemistry (IOMC) Friedrich‐Schiller‐University, D‐07743 Jena, Germany
- Jena Center for Soft Matter (JCSM), Friedrich‐Schiller‐University, D‐07743 Jena, Germany
| | - Antje Vollrath
- Laboratory of Organic and Macromolecular Chemistry (IOMC) Friedrich‐Schiller‐University, D‐07743 Jena, Germany
- Jena Center for Soft Matter (JCSM), Friedrich‐Schiller‐University, D‐07743 Jena, Germany
| | - Christian Pietsch
- Laboratory of Organic and Macromolecular Chemistry (IOMC) Friedrich‐Schiller‐University, D‐07743 Jena, Germany
- Jena Center for Soft Matter (JCSM), Friedrich‐Schiller‐University, D‐07743 Jena, Germany
- Dutch Polymer Institute (DPI), Eindhoven 5600 AX, The Netherlands
| | - Stephanie Schubert
- Laboratory of Organic and Macromolecular Chemistry (IOMC) Friedrich‐Schiller‐University, D‐07743 Jena, Germany
- Jena Center for Soft Matter (JCSM), Friedrich‐Schiller‐University, D‐07743 Jena, Germany
- Institute of Pharmacy, Department of Pharmaceutical Technology, Friedrich‐Schiller‐University, D‐07743 Jena, Germany
| | - Georgy M. Pavlov
- Laboratory of Organic and Macromolecular Chemistry (IOMC) Friedrich‐Schiller‐University, D‐07743 Jena, Germany
- Jena Center for Soft Matter (JCSM), Friedrich‐Schiller‐University, D‐07743 Jena, Germany
| | - Ulrich S. Schubert
- Laboratory of Organic and Macromolecular Chemistry (IOMC) Friedrich‐Schiller‐University, D‐07743 Jena, Germany
- Jena Center for Soft Matter (JCSM), Friedrich‐Schiller‐University, D‐07743 Jena, Germany
- Dutch Polymer Institute (DPI), Eindhoven 5600 AX, The Netherlands
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418
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Morral-Ruíz G, Solans C, García ML, García-Celma MJ. Formation of Pegylated polyurethane and Lysine-coated polyurea nanoparticles obtained from O/W nano-emulsions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:6256-6264. [PMID: 22356543 DOI: 10.1021/la204659y] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The present work describes the formation of Pegylated polyurethane and Lysine-coated polyurea nanoparticles obtained from O/W nano-emulsions via an interfacial polycondensation process in the aqueous solution/polysorbate 80/diisocyanate/medium chain triglyceride systems. The initial nano-emulsions were prepared using the phase inversion composition (PIC) method. Dynamic light scattering studies revealed the changes in the particle size occurring during the process of nanoparticle formation. Well-defined polymeric nanoparticles with a small particle diameter (below 80 nm) and low polydispersity index were obtained using a highly hydrophilic component (polyethylene glycol or lysine) and an aliphatic diisocyante monomer. FT-IR and AFM studies showed that the polymeric matrix of nanoparticles was built by copolymers derived from reaction between the diisocyanate and the hydroxyl groups of both nonionic surfactant and the highly hydrophilic component. Pegylated-polyurethane and lysine-coated polyurea nanoparticles designed in this study are promising tools for future applications in biomedical sciences.
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Affiliation(s)
- Genoveva Morral-Ruíz
- Departament de Farmàcia i Tecnologia Farmacèutica, Unitat R&D Associada al CSIC, Facultat de Farmàcia, Universitat de Barcelona, Av. Joan XXIII s/n, 08028 Barcelona, Spain
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419
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Kaur H, Ahuja M, Kumar S, Dilbaghi N. Carboxymethyl tamarind kernel polysaccharide nanoparticles for ophthalmic drug delivery. Int J Biol Macromol 2012; 50:833-9. [DOI: 10.1016/j.ijbiomac.2011.11.017] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2011] [Revised: 11/12/2011] [Accepted: 11/19/2011] [Indexed: 10/14/2022]
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420
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Sunoqrot S, Bae JW, Pearson RM, Shyu K, Liu Y, Kim DH, Hong S. Temporal control over cellular targeting through hybridization of folate-targeted dendrimers and PEG-PLA nanoparticles. Biomacromolecules 2012; 13:1223-30. [PMID: 22439905 DOI: 10.1021/bm300316n] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Polymeric nanoparticles (NPs) and dendrimers are two major classes of nanomaterials that have demonstrated great potential for targeted drug delivery. However, their targeting efficacy has not yet met clinical needs, largely because of a lack of control over their targeting kinetics, which often results in rapid clearance and off-target drug delivery. To address this issue, we have designed a novel hybrid NP (nanohybrid) platform that allows targeting kinetics to be effectively controlled through hybridization of targeted dendrimers with polymeric NPs. Folate (FA)-targeted generation 4 poly(amidoamine) dendrimers were encapsulated into poly(ethylene glycol)-b-poly(D,L-lactide) (PEG-PLA) NPs using a double emulsion method, forming nanohybrids with a uniform size (~100 nm in diameter) at high encapsulation efficiencies (69-85%). Targeted dendrimers encapsulated within the NPs selectively interacted with FA receptor (FR)-overexpressing KB cells upon release in a temporally controlled manner. The targeting kinetics of the nanohybrids were modulated using three different molecular weights (MW) of the PLA block (23, 30, and 45 kDa). The release rates of the dendrimers from the nanohybrids were inversely proportional to the MW of the PLA block, which dictated their binding and internalization kinetics with KB cells. Our results provide evidence that selective cellular interactions can be kinetically controlled by the nanohybrid design, which can potentially enhance targeting efficacy of nanocarriers.
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Affiliation(s)
- Suhair Sunoqrot
- Department of Biopharmaceutical Sciences, University of Illinois at Chicago, Chicago, Illinois, United States
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421
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Puglia C, Bonina F. Lipid nanoparticles as novel delivery systems for cosmetics and dermal pharmaceuticals. Expert Opin Drug Deliv 2012; 9:429-41. [PMID: 22394125 DOI: 10.1517/17425247.2012.666967] [Citation(s) in RCA: 149] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
INTRODUCTION Lipid nanoparticles are innovative carrier systems developed as an alternative to traditional vehicles such as emulsions, liposomes and polymeric nanoparticles. Solid lipid nanoparticles (SLN) and the newest nanostructured lipid carriers (NLC) show important advantages for dermal application of cosmetics and pharmaceuticals. AREA COVERED This article focuses on the main features of lipid nanoparticles, in terms of their preparation and recent advancements. A detailed review of the literature is presented, introducing the importance of these systems in the topical delivery of drugs and active substances. EXPERT OPINION Lipid nanoparticles are able to enhance drug penetration into the skin, allowing increased targeting to the epidermis and consequently increasing treatment efficiency and reducing the systemic absorption of drugs and cosmetic actives. The complete biodegradation of lipid nanoparticles and their biocompatible chemical nature have secured them the title of 'nanosafe carriers.' SLN and NLC represent a new technological era, which has been taken over by the cosmetic and pharmaceutical industry, which will open new channels for effective topical delivery of substances.
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Affiliation(s)
- Carmelo Puglia
- University of Catania, Carmelo Puglia, Department of Drug Sciences, Faculty of Pharmacy, Catania, Italy.
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422
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Tan MXL, Danquah MK. Drug and Protein Encapsulation by Emulsification: Technology Enhancement Using Foam Formulations. Chem Eng Technol 2012. [DOI: 10.1002/ceat.201100358] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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423
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Yang Z, Wang Z, Yao X, Wang Y. Water-dispersible, uniform nanospheres by heating-enabled micellization of amphiphilic block copolymers in polar solvents. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:3011-3017. [PMID: 22211314 DOI: 10.1021/la204760m] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Uniform nanospheres with tunable size down to 30 nm were prepared simply by heating amphiphilic block copolymers in polar solvents. Unlike reverse micelles prepared in nonpolar, oily solvents, these nanospheres have a hydrophilic surface, giving them good dispersibility in water. Furthermore, they are present as individual, separated, rigid particles upon casting from the solution other than continuous thin films of merged micelles cast from micellar solution in nonpolar solvents. These nanospheres were generated by a heating-enabled micellization process in which the affinity between the solvent and the polymer chains as well as the segmental mobility of both hydrophilic and hydrophobic blocks was enhanced, triggering the micellization of the glassy copolymers in polar solvents. This heating-enabled micellization produces purely well-defined nanospheres without interference of other morphologies. The micelle sizes and corona thickness are tunable mainly by changing the lengths of the hydrophobic and hydrophilic blocks, respectively. The heating-enabled micellization route for the preparation of polymeric nanospheres is extremely simple, and is particularly advantageous in producing rigid, micellar nanospheres from block copolymers with long glassy, hydrophobic blocks which are otherwise difficult to prepare with high efficiency and purity. Furthermore, encapsulation of hydrophobic molecules (e.g., dyes) into micelle cores could be integrated into the heating-enabled micellization, leading to a simple and effective process for dye-labeled nanoparticles and drug carriers.
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Affiliation(s)
- Zhiming Yang
- State Key Laboratory of Materials-Oriented Chemical Engineering and College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing, 210009, China
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424
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Development of a biodegradable nanoparticle platform for sildenafil: Formulation optimization by factorial design analysis combined with application of charge-modified branched polyesters. J Control Release 2012; 157:469-77. [DOI: 10.1016/j.jconrel.2011.09.058] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2011] [Revised: 07/26/2011] [Accepted: 09/04/2011] [Indexed: 01/10/2023]
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425
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Souto EB, Severino P, Santana MHA. Preparação de nanopartículas poliméricas a partir de polímeros pré-formados: parte II. POLIMEROS 2012. [DOI: 10.1590/s0104-14282012005000005] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Nanopartículas poliméricas produzidas a partir de polímeros pré-formados, como os poliésteres alifáticos, têm sido amplamente utilizadas para incorporar, principalmente, princípios ativos lipofílicos. A produção das nanopartículas (nanocápsulas e nanosferas) por polímeros pré-formados pode ser realizada por emulsificação-evaporação do solvente, por deslocamento do solvente, por salting-out ou por emulsificação-difusão do solvente. Estes métodos de produção estão revisados e descritos neste artigo, evidenciando os parâmetros tecnológicos que interferem nas características físico-químicas das nanopartículas, como a solubilidade do princípio ativo, o volume e pH do meio de polimerização, a massa molar e concentração do monômero e a natureza e concentração do tensoativo.
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426
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Andrieu J, Kotman N, Maier M, Mailänder V, Strauss WSL, Weiss CK, Landfester K. Live Monitoring of Cargo Release From Peptide-Based Hybrid Nanocapsules Induced by Enzyme Cleavage. Macromol Rapid Commun 2012; 33:248-53. [DOI: 10.1002/marc.201100729] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2011] [Revised: 11/24/2011] [Indexed: 12/20/2022]
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427
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Beck-Broichsitter M, Kleimann P, Gessler T, Seeger W, Kissel T, Schmehl T. Nebulization performance of biodegradable sildenafil-loaded nanoparticles using the Aeroneb® Pro: Formulation aspects and nanoparticle stability to nebulization. Int J Pharm 2012; 422:398-408. [DOI: 10.1016/j.ijpharm.2011.10.012] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2011] [Revised: 09/28/2011] [Accepted: 10/01/2011] [Indexed: 01/23/2023]
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428
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Sharma R, Ahuja M, Kaur H. Thiolated pectin nanoparticles: Preparation, characterization and ex vivo corneal permeation study. Carbohydr Polym 2012. [DOI: 10.1016/j.carbpol.2011.09.065] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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429
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Lee J, Kim H, Kim S, Lee H, Kim J, Kim N, Park HJ, Choi EK, Lee JS, Kim C. A multifunctional mesoporous nanocontainer with an iron oxide core and a cyclodextrin gatekeeper for an efficient theranostic platform. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm32137h] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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430
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Wachsmann P, Lamprecht A. Polymeric nanoparticles for the selective therapy of inflammatory bowel disease. Methods Enzymol 2012; 508:377-97. [PMID: 22449936 DOI: 10.1016/b978-0-12-391860-4.00019-7] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The two main forms of inflammatory bowel disease (IBD) are Crohn's disease and ulcerative colitis. Both diseases are chronic relapsing inflammations of the gut. The challenge for drug carrier systems that are used for the therapy of IBD is the delivery of the active ingredient to the site of inflammation. A site-directed targeting should lead to higher local drug concentrations, less systemic absorption, and therewith to less adverse effects. Because nanoparticulate drug carrier systems have the ability to accumulate in the inflamed regions, they offer a new targeting approach in IBD. We describe preparation techniques for polymeric nanoparticles and methods to characterize their physicochemical properties, their behavior in cell culture, and the therapeutic efficiency in murine experimental colitis models.
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Affiliation(s)
- Philip Wachsmann
- Laboratory of Pharmaceutical Technology and Biopharmaceutics, University of Bonn, Bonn, Germany
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431
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Beck-Broichsitter M, Merkel OM, Kissel T. Controlled pulmonary drug and gene delivery using polymeric nano-carriers. J Control Release 2011; 161:214-24. [PMID: 22192571 DOI: 10.1016/j.jconrel.2011.12.004] [Citation(s) in RCA: 131] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2011] [Revised: 12/06/2011] [Accepted: 12/06/2011] [Indexed: 12/14/2022]
Abstract
Pulmonary drug and gene delivery to the lung represents a non-invasive avenue for local and systemic therapies. However, the respiratory tract provides substantial barriers that need to be overcome for successful pulmonary application. In this regard, micro- and nano-sized particles offer novel concepts for the development of optimized therapeutic tools in pulmonary research. Polymeric nano-carriers are generally preferred as controlled pulmonary delivery systems due to prolonged retention in the lung. Specific manipulation of nano-carrier characteristics enables the design of "intelligent" carriers specific for modulation of the duration and intensity of pharmacological effects. New formulations should be tested for pulmonary absorption and distribution using more advanced ex vivo and in vivo models. The delivery of nano-carriers to the air-space enables a detailed characterization of the interaction between the carrier vehicle and the natural pulmonary environment. In summary, polymeric nanoparticles seem to be especially promising as controlled delivery systems and represent a solid basis for future advancement for pulmonary delivery applications.
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Affiliation(s)
- Moritz Beck-Broichsitter
- Department of Pharmaceutics and Biopharmacy, Philipps-Universität, Ketzerbach 63, D-35037 Marburg, Germany
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432
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Karavelidis V, Karavas E, Giliopoulos D, Papadimitriou S, Bikiaris D. Evaluating the effects of crystallinity in new biocompatible polyester nanocarriers on drug release behavior. Int J Nanomedicine 2011; 6:3021-32. [PMID: 22162659 PMCID: PMC3230569 DOI: 10.2147/ijn.s26016] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Four new polyesters based on 1,3-propanediol and different aliphatic dicarboxylic acids were used to prepare ropinirole HCl-loaded nanoparticles. The novelty of this study lies in the use of polyesters with similar melting points but different degrees of crystallinity, varying from 29.8% to 67.5%, as drug nanocarriers. Based on their toxicity to human umbilical vein endothelial cells, these aliphatic polyesters were found to have cytotoxicity similar to that of polylactic acid and so may be considered as prominent drug nanocarriers. Drug encapsulation in polyesters was performed via an emulsification/solvent evaporation method. The mean particle size of drug-loaded nanoparticles was 164–228 nm, and the drug loading content was 16%–23%. Wide angle X-ray diffraction patterns showed that ropinirole HCl existed in an amorphous state within the nanoparticle polymer matrices. Drug release diagrams revealed a burst effect for ropinirole HCl in the first 6 hours, probably due to release of drug located on the nanoparticle surface, followed by slower release. The degree of crystallinity of the host polymer matrix seemed to be an important parameter, because higher drug release rates were observed in polyesters with a low degree of crystallinity.
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Affiliation(s)
- Vassilios Karavelidis
- Laboratory of Polymer Chemistry and Technology, Chemistry Department, Aristotle University of Thessaloniki, Thessaloniki, Greece
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433
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Van de Ven H, Vermeersch M, Vandenbroucke RE, Matheeussen A, Apers S, Weyenberg W, De Smedt SC, Cos P, Maes L, Ludwig A. Intracellular drug delivery in Leishmania-infected macrophages: Evaluation of saponin-loaded PLGA nanoparticles. J Drug Target 2011; 20:142-54. [PMID: 22080813 DOI: 10.3109/1061186x.2011.595491] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Drug delivery systems present an opportunity to potentiate the therapeutic effect of antileishmanial drugs. Colloidal carriers are rapidly cleared by the phagocytic cells of the reticuloendothelial system (RES), rendering them ideal vehicles for passive targeting of antileishmanials. This paper describes the development of poly(D,L-lactide-co-glycolide) (PLGA) nanoparticles (NPs) for the antileishmanial saponin β-aescin. NPs were prepared using the combined emulsification solvent evaporation/salting-out technique. Confocal microscopy was used to visualise the internalisation and intracellular trafficking of fluorescein- and nile red-labelled PLGA NPs in J774A.1 macrophages infected with GFP-transfected Leishmania donovani. The in vitro activity of aescin and aescin-loaded NPs on L. infantum was determined in the axenic model as well as in the ex vivo model. The developed PLGA NPs were monodispersed with Z(ave)<300 nm, exhibited negative zeta potentials and had relatively high drug loadings ranging from 5.80 to 8.68% w/w PLGA. The fluorescent NPs were internalised by the macrophages and trafficked towards the lysosomes after 2 h in vitro incubation. Co-localisation of the NPs and the parasite was not shown. A two-fold increase in activity was observed in the ex vivo macrophage model by encapsulating β-aescin in PLGA NPs (IC(50), 0.48-0.76 µg/mL vs. 1.55 ± 0.32 µg/mL for the free drug).
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Affiliation(s)
- H Van de Ven
- University of Antwerp, Laboratory of Pharmaceutical Technology and Biopharmacy, Faculty of Pharmaceutical, Biomedical and Veterinary Sciences, Universiteitsplein 1, CDE, Antwerpen (Wilrijk), 2610 Belgium.
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434
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Van de Ven H, Vandervoort J, Weyenberg W, Apers S, Ludwig A. Mixture designs in the optimisation of PLGA nanoparticles: influence of organic phase composition onβ-aescin encapsulation. J Microencapsul 2011; 29:115-25. [DOI: 10.3109/02652048.2011.630108] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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435
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Vectorisation à visée thérapeutique ou diagnostique : une synthèse de l’état de l’art dans le domaine du cancer. Bull Cancer 2011; 98:1363-71. [DOI: 10.1684/bdc.2011.1468] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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436
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Fontana M, Rezer J, Coradini K, Leal D, Beck R. Improved efficacy in the treatment of contact dermatitis in rats by a dermatological nanomedicine containing clobetasol propionate. Eur J Pharm Biopharm 2011; 79:241-9. [DOI: 10.1016/j.ejpb.2011.05.002] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2011] [Revised: 05/02/2011] [Accepted: 05/04/2011] [Indexed: 11/24/2022]
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437
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Thasneem YM, Sajeesh S, Sharma CP. Effect of thiol functionalization on the hemo-compatibility of PLGA nanoparticles. J Biomed Mater Res A 2011; 99:607-17. [PMID: 21953904 DOI: 10.1002/jbm.a.33220] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2011] [Revised: 07/10/2011] [Accepted: 07/21/2011] [Indexed: 11/05/2022]
Abstract
In this study, an attempt was made to reduce the interaction of poly(D,L-lactic acid/glycolic acid) (PLGA) nanoparticles with the opsonins and phagocytic cells upon functionalization with thiol groups. Terminal carboxylic groups in PLGA were conjugated to the amino group of cysteine and nanoparticles were prepared by solvent evaporation technique. Detailed in vitro investigations were performed on PLGA and cysteine modified PLGA (Cys-PLGA) nanoparticles to asses their blood compatibility. The effect of these nanoparticles on the release of proinflammatory cytokines (IL-1β, IL-6, and TNF-α) from human macrophage cells were evaluated. Thiolation was confirmed by fourier transform infrared spectroscopy and Ellman's assay; both PLGA and modified nanoparticles had average size in the range of 250 nm. Thiolation was an effective strategy in reducing the protein adsorption, complement activation, and platelet activation of PLGA nanoparticles. PLGA and modified PLGA nanoparticles were compatible with the blood cells and no hemolytic effect was detected. Particles were noncytotoxic on L929 cells and release of proinflammatory cytokines from macrophage cells was rather unaffected with the modification strategy. From these studies, it seems that thiolation of particulate delivery system is an interesting approach in manipulating the blood-particle interactions and appears to be an effective candidate for injectable drug delivery applications.
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Affiliation(s)
- Y M Thasneem
- Division of Biosurface Technology, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences & Technology, Thiruvananthapuram 695012, India
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438
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Polyamide Nanocapsules and Nano-emulsions Containing Parsol® MCX and Parsol® 1789: In Vitro Release, Ex Vivo Skin Penetration and Photo-Stability Studies. Pharm Res 2011; 29:559-73. [DOI: 10.1007/s11095-011-0592-5] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2011] [Accepted: 09/13/2011] [Indexed: 11/25/2022]
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439
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The application of MALDI TOF MS in biopharmaceutical research. Int J Pharm 2011; 417:70-82. [DOI: 10.1016/j.ijpharm.2010.12.010] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2010] [Revised: 12/05/2010] [Accepted: 12/06/2010] [Indexed: 12/21/2022]
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440
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Yu X, Pishko MV. Nanoparticle-based biocompatible and targeted drug delivery: characterization and in vitro studies. Biomacromolecules 2011; 12:3205-12. [PMID: 21786828 DOI: 10.1021/bm200681m] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Paclitaxel nanoparticles (PAX NPs) prepared with the size of 110 ± 10 nm and ζ potential of -40 ± 3 mV were encapsulated in synthetic/biomacromolecule shell chitosan, dextran-sulfate using a layer-by-layer self-assembly technique. Zeta potential measurements, analysis of X-ray photoelectron spectroscopy, and scanning electron microscopy confirmed the successful adsorption of each layer. Surface modifications of these core-shell NPs were performed by covalently conjugating with poly(ethylene glycol) (H(2)N-PEG-carboxymethyl, M(w) 3400) and fluorescence labeled wheat germ agglutinin (F-WGA) to build a biocompatible and targeted drug delivery system. 32% of PAX was released from four bilayers of biomacromolecule assembled NPs within 8 h as compared with >85% of the drug released from the bare NPs. Moreover, high cell viability with PEG conjugation and high binding capacity of WGA-modified NPs with Caco-2 cells were observed. This biocompatible and targeted NP-based drug delivery system, therefore, may be considered as a potential candidate for the treatment of colonic cancer and other diseases.
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Affiliation(s)
- Xiao Yu
- Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843-3122, United States
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441
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442
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Asadi H, Rostamizadeh K, Salari D, Hamidi M. Preparation of biodegradable nanoparticles of tri-block PLA–PEG–PLA copolymer and determination of factors controlling the particle size using artificial neural network. J Microencapsul 2011; 28:406-16. [DOI: 10.3109/02652048.2011.576784] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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443
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Wacker M, Zensi A, Kufleitner J, Ruff A, Schütz J, Stockburger T, Marstaller T, Vogel V. A toolbox for the upscaling of ethanolic human serum albumin (HSA) desolvation. Int J Pharm 2011; 414:225-32. [DOI: 10.1016/j.ijpharm.2011.04.046] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2011] [Revised: 04/08/2011] [Accepted: 04/16/2011] [Indexed: 10/18/2022]
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444
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Florczyk SJ, Kim DJ, Wood DL, Zhang M. Influence of processing parameters on pore structure of 3D porous chitosan-alginate polyelectrolyte complex scaffolds. J Biomed Mater Res A 2011; 98:614-20. [PMID: 21721118 DOI: 10.1002/jbm.a.33153] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2010] [Revised: 02/27/2011] [Accepted: 04/15/2011] [Indexed: 11/09/2022]
Abstract
Fabrication of porous polymeric scaffolds with controlled structure can be challenging. In this study, we investigated the influence of key experimental parameters on the structures and mechanical properties of resultant porous chitosan-alginate (CA) polyelectrolyte complex (PEC) scaffolds, and on proliferation of MG-63 osteoblast-like cells, targeted at bone tissue engineering. We demonstrated that the porous structure is largely affected by the solution viscosity, which can be regulated by the acetic acid and alginate concentrations. We found that the CA PEC solutions with viscosity below 300 Pa.s yielded scaffolds of uniform pore structure and that more neutral pH promoted more complete complexation of chitosan and alginate, yielding stiffer scaffolds. CA PEC scaffolds produced from solutions with viscosities below 300 Pa.s also showed enhanced cell proliferation compared with other samples. By controlling the key experimental parameters identified in this study, CA PEC scaffolds of different structures can be made to suit various tissue engineering applications.
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Affiliation(s)
- Stephen J Florczyk
- Department of Materials Science and Engineering, University of Washington, Seattle, Washington 98195-2120, USA
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445
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D'Addio SM, Prud'homme RK. Controlling drug nanoparticle formation by rapid precipitation. Adv Drug Deliv Rev 2011; 63:417-26. [PMID: 21565233 DOI: 10.1016/j.addr.2011.04.005] [Citation(s) in RCA: 274] [Impact Index Per Article: 21.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2010] [Revised: 04/19/2011] [Accepted: 04/22/2011] [Indexed: 12/15/2022]
Abstract
Nanoparticles are a drug delivery platform that can enhance the efficacy of active pharmaceutical ingredients, including poorly-water soluble compounds, ionic drugs, proteins, peptides, siRNA and DNA therapeutics. To realize the potential of these nano-sized carriers, manufacturing processes must be capable of providing reproducible, scalable and stable formulations. Antisolvent precipitation to form drug nanoparticles has been demonstrated as one such robust and scalable process. This review discusses the nucleation and growth of organic nanoparticles at high supersaturation. We present process considerations for controlling supersaturations as well as physical and chemical routes for modifying API solubility to optimize supersaturation and control particle size. We conclude with a discussion of post-precipitation factors which influence nanoparticle stability and efficacy in vivo and techniques for stabilization.
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446
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Dinarvand R, Sepehri N, Manoochehri S, Rouhani H, Atyabi F. Polylactide-co-glycolide nanoparticles for controlled delivery of anticancer agents. Int J Nanomedicine 2011; 6:877-95. [PMID: 21720501 PMCID: PMC3124394 DOI: 10.2147/ijn.s18905] [Citation(s) in RCA: 279] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2011] [Indexed: 11/23/2022] Open
Abstract
The effectiveness of anticancer agents may be hindered by low solubility in water, poor permeability, and high efflux from cells. Nanomaterials have been used to enable drug delivery with lower toxicity to healthy cells and enhanced drug delivery to tumor cells. Different nanoparticles have been developed using different polymers with or without surface modification to target tumor cells both passively and/or actively. Polylactide-co-glycolide (PLGA), a biodegradable polyester approved for human use, has been used extensively. Here we report on recent developments concerning PLGA nanoparticles prepared for cancer treatment. We review the methods used for the preparation and characterization of PLGA nanoparticles and their applications in the delivery of a number of active agents. Increasing experience in the field of preparation, characterization, and in vivo application of PLGA nanoparticles has provided the necessary momentum for promising future use of these agents in cancer treatment, with higher efficacy and fewer side effects.
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Affiliation(s)
- R Dinarvand
- Department of Pharmaceutics, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran.
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447
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das Neves J, Bahia MF, Amiji MM, Sarmento B. Mucoadhesive nanomedicines: characterization and modulation of mucoadhesion at the nanoscale. Expert Opin Drug Deliv 2011; 8:1085-104. [DOI: 10.1517/17425247.2011.586334] [Citation(s) in RCA: 111] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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448
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Mora-Huertas CE, Fessi H, Elaissari A. Influence of process and formulation parameters on the formation of submicron particles by solvent displacement and emulsification-diffusion methods critical comparison. Adv Colloid Interface Sci 2011; 163:90-122. [PMID: 21376297 DOI: 10.1016/j.cis.2011.02.005] [Citation(s) in RCA: 178] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2010] [Revised: 01/28/2011] [Accepted: 02/04/2011] [Indexed: 12/01/2022]
Abstract
Solvent displacement and emulsification-diffusion are the methods used most often for preparing biodegradable submicron particles. The major difference between them is the procedure, which results from the total or partial water miscibility of the organic solvents used. This review is devoted to a critical and a comparative analysis based on the mechanistic aspects of particle formation and reported data on the influence of operating conditions, polymers, stabilizing agents and solvents on the size and zeta-potential of particles. In addition, a systematic study was carried out experimentally in order to obtain experimental data not previously reported and compare the data pertaining to the different methods. Thus the discussion of the behaviors reported in the light of the results obtained from the literature takes into account a wide range of theoretical and practical information. This leads to discussion on the formation mechanism of the particles and provides criteria for selecting the adequate method and raw materials for satisfying specific objectives in submicron particle design.
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449
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Rodriguez-Emmenegger C, Jäger A, Jäger E, Stepanek P, Alles AB, Guterres S, Pohlmann A, Brynda E. Polymeric nanocapsules ultra stable in complex biological media. Colloids Surf B Biointerfaces 2011; 83:376-81. [DOI: 10.1016/j.colsurfb.2010.12.013] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2010] [Revised: 12/04/2010] [Accepted: 12/07/2010] [Indexed: 10/18/2022]
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450
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Barreto JA, O'Malley W, Kubeil M, Graham B, Stephan H, Spiccia L. Nanomaterials: applications in cancer imaging and therapy. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2011; 23:H18-40. [PMID: 21433100 DOI: 10.1002/adma.201100140] [Citation(s) in RCA: 476] [Impact Index Per Article: 36.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2010] [Indexed: 05/11/2023]
Abstract
The application of nanomaterials (NMs) in biomedicine is increasing rapidly and offers excellent prospects for the development of new non-invasive strategies for the diagnosis and treatment of cancer. In this review, we provide a brief description of cancer pathology and the characteristics that are important for tumor-targeted NM design, followed by an overview of the different types of NMs explored to date, covering synthetic aspects and approaches explored for their application in unimodal and multimodal imaging, diagnosis and therapy. Significant synthetic advances now allow for the preparation of NMs with highly controlled geometry, surface charge, physicochemical properties, and the decoration of their surfaces with polymers and bioactive molecules in order to improve biocompatibility and to achieve active targeting. This is stimulating the development of a diverse range of nanometer-sized objects that can recognize cancer tissue, enabling visualization of tumors, delivery of anti-cancer drugs and/or the destruction of tumors by different therapeutic techniques.
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Affiliation(s)
- José A Barreto
- School of Chemistry, Monash University Clayton, VIC, Australia
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