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Destribats M, Schmitt V, Backov R. Thermostimulable wax@SiO2 core-shell particles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:1734-1742. [PMID: 20099917 DOI: 10.1021/la902828q] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We propose a new synthesis pathway without any sacrificial template to prepare original monodisperse thermoresponsive capsules made of a wax core surrounded by a silica shell. Under heating, the inner wax expands and the shell breaks, leading to the liquid oil release. Such capsules that allow triggered deliverance provoked by an external stimulus belong to the class of smart materials. The process is based on the elaboration of size-controlled emulsions stabilized by particles (Pickering emulsions) exploiting the limited coalescence phenomenon. Then the emulsions are cooled down and the obtained suspensions are mineralized by the hydrolysis and condensation of a monomer at the wax-water interface, leading to the formation of capsules. The shell break and the liquid oil release are provoked by heating above the wax melting temperature. We characterize the obtained materials and examine the effect of processing parameters and heating history. By an appropriate choice of the wax, the temperature of release can easily be tuned.
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Affiliation(s)
- Mathieu Destribats
- Centre de Recherche Paul Pascal, Université Bordeaux 1, UPR 8641-CNRS, 115 Avenue du Dr Albert Schweitzer, 33600 Pessac, France
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52
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Otero-Espinar F, Torres-Labandeira J, Alvarez-Lorenzo C, Blanco-Méndez J. Cyclodextrins in drug delivery systems. J Drug Deliv Sci Technol 2010. [DOI: 10.1016/s1773-2247(10)50046-7] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Nielsen AL, Andersen MBO, Bugge TV, Nielsen CF, Nielsen TB, Wimmer R, Yu D, Larsen KL. Use of β‐cyclodextrins to control the structure of water‐soluble copolymers with hydrophobic parts. ACTA ACUST UNITED AC 2009. [DOI: 10.1002/pola.23704] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- A. L. Nielsen
- Department of Chemistry and Water Technology, Danish Technological Institute, Kongsvang Allé 29, 8000 Aarhus, Denmark
| | - M. B. O. Andersen
- Section of Chemistry, Department of Biotechnology, Chemistry and Environmental Engineering, Aalborg University, Sohngaardsholmsvej 57, Aalborg DK‐9000, Denmark
| | - T. V. Bugge
- Section of Chemistry, Department of Biotechnology, Chemistry and Environmental Engineering, Aalborg University, Sohngaardsholmsvej 57, Aalborg DK‐9000, Denmark
| | - C. F. Nielsen
- Section of Chemistry, Department of Biotechnology, Chemistry and Environmental Engineering, Aalborg University, Sohngaardsholmsvej 57, Aalborg DK‐9000, Denmark
| | - T. B. Nielsen
- Section of Chemistry, Department of Biotechnology, Chemistry and Environmental Engineering, Aalborg University, Sohngaardsholmsvej 57, Aalborg DK‐9000, Denmark
| | - R. Wimmer
- Section of Chemistry, Department of Biotechnology, Chemistry and Environmental Engineering, Aalborg University, Sohngaardsholmsvej 57, Aalborg DK‐9000, Denmark
| | - D. Yu
- Section of Chemistry, Department of Biotechnology, Chemistry and Environmental Engineering, Aalborg University, Sohngaardsholmsvej 57, Aalborg DK‐9000, Denmark
| | - K. L. Larsen
- Section of Chemistry, Department of Biotechnology, Chemistry and Environmental Engineering, Aalborg University, Sohngaardsholmsvej 57, Aalborg DK‐9000, Denmark
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55
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Self-assembling microparticles with controllable disruption properties based on cyclodextrin interactions. Colloids Surf B Biointerfaces 2009; 73:267-75. [DOI: 10.1016/j.colsurfb.2009.05.023] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2009] [Revised: 05/18/2009] [Accepted: 05/25/2009] [Indexed: 11/18/2022]
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Affiliation(s)
- Akira Harada
- Department of Macromolecular Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
| | - Akihito Hashidzume
- Department of Macromolecular Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
| | - Hiroyasu Yamaguchi
- Department of Macromolecular Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
| | - Yoshinori Takashima
- Department of Macromolecular Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
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57
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Jagur-Grodzinski J. Polymeric gels and hydrogels for biomedical and pharmaceutical applications. POLYM ADVAN TECHNOL 2009. [DOI: 10.1002/pat.1504] [Citation(s) in RCA: 280] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Mejri M, BenSouissi A, Aroulmoji V, Rogé B. Hydration and self-association of caffeine molecules in aqueous solution: comparative effects of sucrose and beta-cyclodextrin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2009; 73:6-10. [PMID: 19261543 DOI: 10.1016/j.saa.2009.01.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2008] [Accepted: 01/08/2009] [Indexed: 05/27/2023]
Abstract
The UV-spectra of pure caffeine were measured and two quite differentiated hyper- or hypo-chromic effects were observed as concentration was increased. The first one was explained as due to caffeine-water molecule interaction and the second as originating from dimer formation and staking of caffeine molecules. The effects of sucrose and beta-cyclodextrin on the hydration and the self-association of caffeine were also examined by UV spectroscopy. Sucrose was found to enhance the self-association of caffeine molecules by attracting and structuring water molecules around itself. The caffeine-caffeine hydrophobic interactions were promoted in such hydrophilic environment and so was the stacking. The molecular aggregation leads to reducing the electronic mobility and so is the case for the mesomeric effect in the heterogeneous cycle. This could explain the hypo-chromic phenomenon observed when sucrose concentration was increased. Beta-cyclodextrin shows a distinct behaviour because of its ability to form inclusion complexes with various hydrophobic guest molecules. This ability enhances the solubility of caffeine molecules throughout the inclusion interactions and prevents the caffeine self-association.
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Affiliation(s)
- Mondher Mejri
- Département des Industries Agroalimentaires, Institut Supérieure des Etudes Technologiques de Zaghouan, 1121 Mograne, Tunisia.
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59
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Nielsen AL, Madsen F, Larsen KL. Cyclodextrin modified hydrogels of PVP/PEG for sustained drug release. Drug Deliv 2009; 16:92-101. [PMID: 19267300 DOI: 10.1080/10717540802605129] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Abstract
Hydrogels are water swollen networks of polymers and especially hydrogels consisting of poly vinylpyrrolidone/poly ethyleneglycol-dimethacrylate (PVP/PEG-DMA) blends show promising wound care properties. Enhanced functionality of the hydrogels can be achieved by incorporating drugs and other substances that may assist wound healing into the gel matrix. Controlling the release of active compounds from the hydrogels may be possible by carefully modifying the polymer matrix. For this purpose, cyclodextrins (CD) were grafted to the polymer matrix in 4-5 w/w% in an attempt to retard the release of water-soluble drugs. Ibuprofenate (IBU) was chosen as model drug and loaded in IBU/CD ratios of 0.6, 1.2, and 2.5. Vinyl derivatives of alpha-, beta- and gamma-CD were produced, added to the prepolymer blend and cured by UV-light. During this curing process the CD derivatives were covalently incorporated into the hydrogel matrix. The modified hydrogels were loaded with ibuprofenate by swelling. The release of the model drug from CD modified hydrogels show that especially covalently bonded beta-cyclodextrin can change both the release rate and the release profile of ibuprofen.
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Affiliation(s)
- Anne Louise Nielsen
- Department of Biotechnology, Chemistry and Environmental Engineering, Aalborg University, Aalborg, Denmark
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Bioadhesive properties and biodistribution of cyclodextrin–poly(anhydride) nanoparticles. Eur J Pharm Sci 2009; 37:231-40. [DOI: 10.1016/j.ejps.2009.02.010] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2008] [Revised: 02/10/2009] [Accepted: 02/15/2009] [Indexed: 11/17/2022]
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Vauthier C, Bouchemal K. Methods for the preparation and manufacture of polymeric nanoparticles. Pharm Res 2008; 26:1025-58. [PMID: 19107579 DOI: 10.1007/s11095-008-9800-3] [Citation(s) in RCA: 476] [Impact Index Per Article: 29.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2008] [Accepted: 12/01/2008] [Indexed: 10/21/2022]
Abstract
This review summarizes the different methods of preparation of polymer nanoparticles including nanospheres and nanocapsules. The first part summarizes the basic principle of each method of nanoparticle preparation. It presents the most recent innovations and progresses obtained over the last decade and which were not included in previous reviews on the subject. Strategies for the obtaining of nanoparticles with controlled in vivo fate are described in the second part of the review. A paragraph summarizing scaling up of nanoparticle production and presenting corresponding pilot set-up is considered in the third part of the review. Treatments of nanoparticles, applied after the synthesis, are described in the next part including purification, sterilization, lyophilization and concentration. Finally, methods to obtain labelled nanoparticles for in vitro and in vivo investigations are described in the last part of this review.
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Affiliation(s)
- Christine Vauthier
- CNRS UMR 8612, Université Paris Sud-11, 92296, Chatenay-Malabry, France.
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62
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Study of inclusion complex formation between a cationic surfactant, two cyclodextrins and a drug. J INCL PHENOM MACRO 2008. [DOI: 10.1007/s10847-008-9468-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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63
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Chiellini F, Piras AM, Errico C, Chiellini E. Micro/nanostructured polymeric systems for biomedical and pharmaceutical applications. Nanomedicine (Lond) 2008; 3:367-93. [DOI: 10.2217/17435889.3.3.367] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
This review provides an outline of the polymeric micro/nanostructured advanced systems that are suited for the controlled and targeted administration of, specifically, nonconventional drugs. The contribution of new trends in drug-delivery technology is focused on two major parts, dealing with brief surveys of: the biodegradable/bioerodible polymeric systems used in the formulation of micro/nanoparticles and techniques used in the preparation of micro/nanoparticles for their biomedical application in cancer treatment specifically, in inflammation pathologies, as oxygen carriers (blood substitutes) and in tissue-engineering practice. A small discussion of the future perspectives of the described systems is also given.
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Affiliation(s)
- Federica Chiellini
- Laboratory of Bioactive Polymeric Materials for Biomedical and Environmental Applications - UdR INSTM - Department of Chemistry & Industrial Chemistry, University of Pisa, Via Vecchia Livornese,1291, 56010, S. Piero a Grado (Pisa), Italy
| | - Anna Maria Piras
- Laboratory of Bioactive Polymeric Materials for Biomedical and Environmental Applications - UdR INSTM - Department of Chemistry & Industrial Chemistry, University of Pisa, Via Vecchia Livornese,1291, 56010, S. Piero a Grado (Pisa), Italy
| | - Cesare Errico
- Laboratory of Bioactive Polymeric Materials for Biomedical and Environmental Applications - UdR INSTM - Department of Chemistry & Industrial Chemistry, University of Pisa, Via Vecchia Livornese,1291, 56010, S. Piero a Grado (Pisa), Italy
| | - Emo Chiellini
- Laboratory of Bioactive Polymeric Materials for Biomedical and Environmental Applications - UdR INSTM - Department of Chemistry & Industrial Chemistry, University of Pisa, Via Vecchia Livornese,1291, 56010, S. Piero a Grado (Pisa), Italy
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Wintgens V, Daoud-Mahammed S, Gref R, Bouteiller L, Amiel C. Aqueous Polysaccharide Associations Mediated by β-Cyclodextrin Polymers. Biomacromolecules 2008; 9:1434-42. [DOI: 10.1021/bm800019g] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Véronique Wintgens
- Systèmes Polymères Complexes, ICMPE, UMR 7182, 2 Rue Henry Dunant, 94320 Thiais, France, Faculté de Pharmacie, UMR 8612, Avenue Jean-Baptiste Clément, 92296 Chatenay-Malabry, France, and Laboratoire de Chimie des Polymères, UMR 7610, Université Pierre et Marie Curie 4, place Jussieu, 75252 Paris cedex05
| | - Samia Daoud-Mahammed
- Systèmes Polymères Complexes, ICMPE, UMR 7182, 2 Rue Henry Dunant, 94320 Thiais, France, Faculté de Pharmacie, UMR 8612, Avenue Jean-Baptiste Clément, 92296 Chatenay-Malabry, France, and Laboratoire de Chimie des Polymères, UMR 7610, Université Pierre et Marie Curie 4, place Jussieu, 75252 Paris cedex05
| | - Ruxandra Gref
- Systèmes Polymères Complexes, ICMPE, UMR 7182, 2 Rue Henry Dunant, 94320 Thiais, France, Faculté de Pharmacie, UMR 8612, Avenue Jean-Baptiste Clément, 92296 Chatenay-Malabry, France, and Laboratoire de Chimie des Polymères, UMR 7610, Université Pierre et Marie Curie 4, place Jussieu, 75252 Paris cedex05
| | - Laurent Bouteiller
- Systèmes Polymères Complexes, ICMPE, UMR 7182, 2 Rue Henry Dunant, 94320 Thiais, France, Faculté de Pharmacie, UMR 8612, Avenue Jean-Baptiste Clément, 92296 Chatenay-Malabry, France, and Laboratoire de Chimie des Polymères, UMR 7610, Université Pierre et Marie Curie 4, place Jussieu, 75252 Paris cedex05
| | - Catherine Amiel
- Systèmes Polymères Complexes, ICMPE, UMR 7182, 2 Rue Henry Dunant, 94320 Thiais, France, Faculté de Pharmacie, UMR 8612, Avenue Jean-Baptiste Clément, 92296 Chatenay-Malabry, France, and Laboratoire de Chimie des Polymères, UMR 7610, Université Pierre et Marie Curie 4, place Jussieu, 75252 Paris cedex05
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Henni-Silhadi W, Deyme M, Boissonnade MM, Appel M, Le Cerf D, Picton L, Rosilio V. Enhancement of the Solubility and Efficacy of Poorly Water-Soluble Drugs by Hydrophobically-Modified Polysaccharide Derivatives. Pharm Res 2007; 24:2317-26. [PMID: 17912487 DOI: 10.1007/s11095-007-9461-7] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2007] [Accepted: 09/17/2007] [Indexed: 11/26/2022]
Abstract
PURPOSE This work was intended to develop and evaluate a new polymeric system based on amphiphilic carboxymethylpullulans (CMP(49)C(8) and CMP(12)C(8)) that can spontaneously self-assemble in aqueous solutions and efficiently solubilize hydrophobic drugs. METHODS The self-assembling properties of CMP(49)C(8) and CMP(12)C(8) were characterized by fluorescence spectroscopy and surface tension measurements. The solubilization of benzophenone and docetaxel was assessed from surface tension measurements, UV spectrometry and HPLC assays. The in vitro cytoxicity of CMP(49)C(8) solutions and the docetaxel commercial vehicle (Tween 80/Ethanol-water) were evaluated in the absence and in the presence of docetaxel. RESULTS Compared to CMP(12)C(8), CMP(49)C(8) in aqueous solutions appeared to self-organize into monomolecular aggregates containing hydrophobic nanodomains, and to significantly increase the apparent solubility of benzophenone. Docetaxel solubility could also be improved in the presence of CMP(49)C(8) but to a lower extent due to the surface properties of the drug. Nevertheless, in vitro, the cytotoxicity studies revealed that against cancer cells, the CMP(49)C(8)-docetaxel formulation was equipotent to the commercial docetaxel one. Furthermore, in the absence of the drug, CMP(49)C(8) appeared less cytotoxic against macrophages than the Tween 80/Ethanol-water. CONCLUSIONS CMP(49)C(8) is a good candidate for solubilizing hydrophobic drugs and could be applied to docetaxel formulations.
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Affiliation(s)
- Widad Henni-Silhadi
- Physico-Chimie des Surfaces Univ Paris-Sud, UMR CNRS 8612, 5 Rue Jean-Baptiste Clément, 92296, Châtenay-Malabry Cedex, France
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