Academic literature on the topic 'Polyion complex micelle'
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Journal articles on the topic "Polyion complex micelle"
Nguyen, Vo, Marie-Claire De Pauw-Gillet, Mario Gauthier, and Olivier Sandre. "Magnetic Polyion Complex Micelles for Cell Toxicity Induced by Radiofrequency Magnetic Field Hyperthermia." Nanomaterials 8, no. 12 (December 6, 2018): 1014. http://dx.doi.org/10.3390/nano8121014.
Full textMiyazaki, Takuya, Satoshi Uchida, Yuji Miyahara, Akira Matsumoto, and Horacio Cabral. "Development of Flexible Polycation-Based mRNA Delivery Systems for In Vivo Applications." Materials Proceedings 4, no. 1 (November 12, 2020): 5. http://dx.doi.org/10.3390/iocn2020-07857.
Full textJang, Woo Dong, Nobuhiro Nishiyama, and Kazunori Kataoka. "Preparation of Naphthalocyanine Dendrimer Loaded Polyion Complex Micelle for Photodynamic Therapy." Key Engineering Materials 342-343 (July 2007): 465–68. http://dx.doi.org/10.4028/www.scientific.net/kem.342-343.465.
Full textZheng, Pan, Yang Liu, Jinjin Chen, Weiguo Xu, Gao Li, and Jianxun Ding. "Targeted pH-responsive polyion complex micelle for controlled intracellular drug delivery." Chinese Chemical Letters 31, no. 5 (May 2020): 1178–82. http://dx.doi.org/10.1016/j.cclet.2019.12.001.
Full textChen, Fan, Radhika Raveendran, Cheng Cao, Robert Chapman, and Martina H. Stenzel. "Correlation between polymer architecture and polyion complex micelle stability with proteins in spheroid cancer models as seen by light-sheet microscopy." Polymer Chemistry 10, no. 10 (2019): 1221–30. http://dx.doi.org/10.1039/c8py01565a.
Full textGuo, Hui, Jixue Wang, Liang He, Yuchuan Hou, and Jianxun Ding. "Targeting polyion complex micelle intracellularly delivers protein drug toward orthotopic bladder cancer." Nanomedicine: Nanotechnology, Biology and Medicine 14, no. 5 (July 2018): 1883. http://dx.doi.org/10.1016/j.nano.2017.11.377.
Full textMaggi, Flavia, Serena Ciccarelli, Marco Diociaiuti, Stefano Casciardi, and Giancarlo Masci. "Chitosan Nanogels by Template Chemical Cross-Linking in Polyion Complex Micelle Nanoreactors." Biomacromolecules 12, no. 10 (October 10, 2011): 3499–507. http://dx.doi.org/10.1021/bm201015h.
Full textIdeta, Ryuichi, Yasuo Yanagi, Yasuhiro Tamaki, Fumitaka Tasaka, Atsushi Harada, and Kazunori Kataoka. "Effective accumulation of polyion complex micelle to experimental choroidal neovascularization in rats." FEBS Letters 557, no. 1-3 (December 23, 2003): 21–25. http://dx.doi.org/10.1016/s0014-5793(03)01315-2.
Full textNaito, Mitsuru, Takehiko Ishii, Akira Matsumoto, Kanjiro Miyata, Yuji Miyahara, and Kazunori Kataoka. "A Phenylboronate-Functionalized Polyion Complex Micelle for ATP-Triggered Release of siRNA." Angewandte Chemie 124, no. 43 (August 21, 2012): 10909–13. http://dx.doi.org/10.1002/ange.201203360.
Full textNaito, Mitsuru, Takehiko Ishii, Akira Matsumoto, Kanjiro Miyata, Yuji Miyahara, and Kazunori Kataoka. "A Phenylboronate-Functionalized Polyion Complex Micelle for ATP-Triggered Release of siRNA." Angewandte Chemie International Edition 51, no. 43 (August 21, 2012): 10751–55. http://dx.doi.org/10.1002/anie.201203360.
Full textDissertations / Theses on the topic "Polyion complex micelle"
Nguyen, Vo Thu An. "Magnetic polyion complex micelles as therapy and diagnostic agents." Thesis, Bordeaux, 2015. http://www.theses.fr/2015BORD0138/document.
Full textThis Ph.D. dissertation describes the synthesis of superparamagnetic iron oxide nanoparticles (SPIONs) designed to serve as magnetic resonance imaging (MRI) contrast agents and for heat generation in cellular radiofrequency magnetic field hyperthermia (MFH) treatment. Control over the size and size distribution of the iron oxide nanoparticles (NPs), and thus over their magnetic properties, was achieved using a G1 arborescent copolymer (comb-branched (G0) polystyrene substrate grafted with poly(2-vinylpyridine) side chains, or G0PS-g-P2VP) as a template. Good colloidal stability and biocompatibility of the SPIONs were achieved via the formation of polyion complex (PIC) micelles with a poly(acrylic acid)-block-poly(2-hydroxyethyl acrylate) (PAA-b-PHEA) double-hydrophilic block copolymer
Kim, Dongwook. "Fundamental Properties of Thermo-Responsive Entirely Ionic PIC (Polyion Complex) Micelles." Doctoral thesis, Kyoto University, 2021. http://hdl.handle.net/2433/263683.
Full textHoussein, Dania. "Micelles complexes de polyions à base de copolymères à blocs double hydrophiles et d’homopolyélectrolytes : Etudes physico-chimiques et applications à la synthèse de matériaux nanostructurés." Thesis, Montpellier, Ecole nationale supérieure de chimie, 2013. http://www.theses.fr/2012ENCM0028.
Full textPolyion complex micelles, or "PIC micelles", formed by electrostatic interaction between a neutral-ionic double hydrophilic block copolymer (DHBC) and an oppositely charged homopolyelectrolyte possess interesting properties: solubility of the polyelectrolytes in water, stability of micelles, control of the micellar association / dissociation by various stimuli (pH, ionic strength, light irradiation ...). In this thesis, the physico-chemical properties of PIC micelles of neutral-cationic DHBC/ anionic homopolymer and neutral-anionic DHBC/cationic homopolymer were studied in aqueous solution for use as structuring agents of silica-based organized nanomaterials. The pH range of PIC micelle formation, the critical micelle concentration and aggregation number of micelles were determined for each studied system. We have shown that the formation of micelles follows a cooperative mechanism which depends on the size of the homopolymer. Furthermore, we proposed an original way of photoinduced PIC micelle formation, based on a pH change after irradiation of a photochromic molecule. The studies on the PIC micelles as structuring agents of materials have shown that the morphology (nanoparticular, bulk) and the material structure (lamellar, vermicular) can be controlled by various parameters, such as the mass concentration of the DHBC / homopolyelectrolyte / silica precursor system, the content of the silica precursor and the ratio between the functions of the cationic and anionic polyelectrolytes. Finally, the template was removed by washing the hybrid materials under soft conditions in water
Mathonnat, Mélody. "Le rôle de l’eau dans la structuration des silices mésoporeuses par des complexes électrostatiques." Thesis, Montpellier, 2017. http://www.theses.fr/2017MONTT208/document.
Full textThe objective of this PhD thesis is to understand the physico-chemical phenomena that govern the structural and porous properties of ordered mesoporous materials templated by polyion electrostatic complex micelles. It is defended that the sensitivity of the structure to the physico-chemical parameters of the system is due to the water content in the electrostatic complex which is in osmotic equilibrium with the synthesis medium. First, double-hydrophilic block copolymers (DHBC) were synthesized by ATRP controlled polymerization. They form polyion complex (PIC) micelles in the presence of oppositely charged polyelectrolytes such as the neomycin and oligochitosan weak bases. PIC micelles, colloidal analogues to coacervates, were characterized on a large range of concentration and their concomitant progressive compression was observed together with their ordering and finally their transition to lamellar phases. The core structure and composition were studied through the analysis of a model coacervate system, which macroscopically separates and results from complexation between neomycin and sodium polyacrylate. The coacervate contains up to 60 wt.% of water and exhibits the structure of a network of interpenetrated polymers. The water content in the coacervate depends on physicochemical conditions such as pH and concentration of the system, but also on the addition of osmolytes such as alcohol, PEG polymers or simple salts. A series of mesoporous materials were prepared and their structural and porous properties were modulated by simply varying the physicochemical conditions of the synthesis medium, with a unique DHBC/polyelectrolyte pair. Correlations between the volume fraction of the complex core of the mesogenic system and the obtained material structure could be established and it was shown that the contribution of water was highly significant. Increasing the water content in the coacervates induces an increase of the pore size in 2D hexagonal structures or favours the transition towards lamellar phases of lower curvature. As a conclusion, the synthesis of mesoporous materials mediated by the use of electrostatic complex micelles proved to be all the more environment-friendly as it uses water as the main porogen
Molina, Émilie. "Matériaux hybrides mésoporeux fonctionnalisés par des polymères : élaboration, caractérisation physico-chimique et applications biomédicales." Thesis, Montpellier, Ecole nationale supérieure de chimie, 2015. http://www.theses.fr/2015ENCM0024.
Full textMesostructured hybrid materials were prepared by using original silica-structuring agents, which are polyion complex (PIC) micelles. A great advantage of PIC micelles is that they can be reversibly assembled in aqueous solution by varying physico-chemical parameters. PIC micelles are formed by electrostatic complexation between a neutral-anionic double-hydrophilic block copolymer (DHBC) and an oppositely charged agent of micellization; here a poly(ethylene oxide)-b-poly(acrylic acid) PEO-b-PAA (synthesized by controlled radical polymerization by atom transfer ATRP) and commercial polyamines (oligochitosan OC or aminoglycoside antibiotics) were respectively used. First, the influence of various parameters (pH, temperature, concentration) on PIC micelle association properties was investigated in aqueous solution. Then, the effect of these parameters on the silica mesostructuring process was studied, it provides a better understanding of the formation mechanisms. It was shown that varying interactions between constituents allows to control the mesostructure (hexagonal, lamellar, wormlike) and the material morphology (nanoparticle, microparticle). Finally, the versatility of the approach has been demonstrated with PEO-b-PAA/aminoglycoside systems. Drug-loaded ordered mesostructured materials were prepared following a one-pot route. Moreover, taking advantage of the high degree of functionality of DHBC polymers and of the reversibility of the micellization, polyacid-functionalized mesoporous materials were directly prepared by selectively extracting the micellization agent. PAA-functionalized silica materials were then used to complex diverse active entities such as drugs, whose delivery could be pH-controlled
Phimphachanh, Anthony. "Synthèse et assemblage électrostatique de copolymères à blocs double-hydrophiles." Thesis, Montpellier, 2018. http://www.theses.fr/2018MONTS031.
Full textDouble-Hydrophilic Block Copolymer (DHBC) based PIC micelles were studied for their suitability as structuring agents for the synthesis of functionalized mesoporous silica materials. Assembling micelles through polyions complexation (PIC) is interesting because it is reversible and restricted to a limited range of pH when weak polyelectrolytes are used. Once silica condensation has proceeded, micelles can be disassembled by changing the pH. In this way, the porosity of the material is revealed by elution rather than calcination. If a controlled fraction of the structuring agent could be maintained within the final material, this would open the road to one pot synthesis of functionalized mesoporous materials. Addressing this challenge relies on a good control over the reversibility of the assembling process of the micelles, over their lyotropic behavior and on the possibility to form corona-mixed micelles from two DHBC carrying different neutral blocks.Several series of DHBC were synthetized by controlled radical polymerization in aqueous phase, either by RAFT for poly(ethylene oxide)-based DHBC, or by MADIX for polyacrylamide-based DHBC. The polyelectrolyte block is polyacrylic acid. The targeted molar masses were achieved and low (RAFT) to medium (MADIX) dispersity were obtained testifying a good control over the polymerization process. Various cationic homopolyelectrolytes, either weak or strong, were used as micellization agents (MA). Acidity constants, condensation ratios and electrophoretic mobilities were determined, first for each polyelectrolyte by its own, and then mixed with its MA in suitable conditions for micellization. Change of the apparent acidity constant reflects equilibrium constant of electrostatic complexation, while excess of conductivity reveals the number of ionic sites that are involved in the complexation of both macromolecules.PIC micelles are few nanometers large (4-15 nm) and gather from ten to one hundred DHBC molecules. They show the typical core-corona structure of polymer self-assemblies. An inverse correlation between the size and the cohesion of the complex is evidenced for the first time. It could be explained by the amount of water inside the micelle coacervate core that should increase when the number of anchoring sites between the oppositely charged macromolecules decreases. Up to a weight fraction of 60 wt% , the PIC micelles do not show any lyotropic mesophases. Finally, mixed PIC micelles certainly form when different DHBC are mixed with an MA, however, the corona looks richer in PEO the closer to the core and richer in PAM at the external rim. Such radial segregation of the corona block is not suitable to ensure enough interaction of PEO with silica and could preclude the use of such mixed micelles as structuring agent for the one pot synthesis of functionalized mesoporous materials. Alternatives are proposed
El, jundi Ayman. "DEGRADABLE DOUBLE HYDROPHILIC BLOCK COPOLYMERS FOR HEALTH APPLICATIONS." Thesis, Montpellier, 2019. http://www.theses.fr/2019MONTS141.
Full textBiodegradable amphiphilic copolymers based on poly(ethylene glycol) PEG and aliphatic polyesters (poly(ε-caprolactone) (PCL), poly(lactide) (PLA), poly(glycolide) (PGA)) are widely used in medical applications due to their safety and their acceptance by health authorities. However, their ability to address the challenges faced by the nanomedicines (targeting, programmed response etc…) is limited due to the absence of functional groups. To overcome this limitation, this work focuses on the post-polymerization modification strategies of amphiphilic PEG-b-PCL giving easy access to families of degradable double hydrophilic block copolymers (DHBC). We are particularly interested in the three-step synthesis of DHBC including a thiol-yne photoaddition step which allows, starting from the same macromolecular precursor, the synthesis of DHBC families composed of PEG blocks and side chain functionalized PCL blocks with a neutral, cationic or anionic character. The potential of these DHBC for the formulation of active pharmaceutical ingredients within pH-responsive drug delivery nanosystems is first evaluated using an anti-cancer agent with a broad spectrum of antitumor activity. In another part, we study the formulation of tripartite polyionic complex micelles with an anionic DHBC and siRNA for applications in gene therapy. Finally, the preparation of DHBC/gadolinium nanocomplexes for medical imaging by nuclear magnetic resonance (MRI) is discussed
Till, Ugo Valentin. "Oncopol - Vers le développement critique de vecteurs polymères pour l'oncologie." Thesis, Toulouse, INPT, 2016. http://www.theses.fr/2016INPT0065/document.
Full textThe objective of this study was to critically analyze different polymer self-assemblies used for photodynamic therapy (PDT) and to link this analysis to their therapeutic efficiency. To do that, a thorough characterization of the vectors has been performed by classical techniques such as Dynamic Light Scattering or electron Microscopy, but also using flow fractionation, which has been seldomly used so far for polymeric self-assemblies. In a second step, these have been used as vectors of a photosensitizer, namely Phéophorbide a, and the therapeutic efficiency assessed on both 2D and 3D cell cultures of HCT 116 (colon cancer) and FaDu (head and neck cancer) cells. Different simple polymer vectors have first been evaluated, namely micelles and polymersomes based on diblock amphiphilic copolymers such as poly(ethylene-oxide-b--caprolactone), poly(ethylene-oxide-b-lactide) or poly(ethylene-oxide-b-styrene). This enabled obtaining vectors exhibiting various sizes and morphologies. Results in PDT showed different behaviours and a better efficiency in 3D for PEO-PDLLA. The Asymmetric Flow Field Flow Fractionation was particularly used for these systems to demonstrate their purity. The acquired expertise on this part enabled us to also characterize vectors made of known mixtures of micelles and polymersomes. These revealed antagonism and synergy effects in PDT, demonstrating the presence of complex processes for the cell response. Other self-assemblies consisting of crosslinked systems have also been developed and characterized. These were observed to be particularly efficient for PDT on 3D cell cultures. The comparison of these results with those for the 2D cell culture enabled to highlight the difference between those two biological systems. Finally, self-assemblies based on Polyion Complexes were also formed and characterized. Field Flow Fractionation was once again used as a powerful technique for this, although this implied the use of a special injection device called Frit Inlet. Their PDT efficiency however proved to be low
Wazen, Nada. "Micelles polyioniques ternaires pour la libération intracellulaire d’oligonucleotides." Thèse, 2010. http://hdl.handle.net/1866/5100.
Full textAntisens oligonucleotides (ONs) present great potential as therapeutic agents. However, their physicochemical properties hinder their use in gene therapy. Targeting systems, such as polyion complex micelles (PICMs), have been proposed to circumvent the main hurdles related to ON delivery. Their unique core/shell structure can protect the ON against premature degradation and the coupling of a ligand on their surface can increase their specificity and internalization. In other systems, a polymer with pH-sensitive properties can be added to facilitate the release of the ON from the endosome and increase its efficiency. The present work was aimed at optimizing ternary PICMs targeted for the delivery of antisens ON. Such systems would provide both cellular internalization of cargo by interaction with receptors on the surface of cell membranes and escape from the endosome through a mechanism of destabilization of the endosomal membrane. PICMs composed of cationic copolymers of poly(ethylene glycol)-bloc-poly((alkylamino)ethyl methacrylate) with a methacrylic acid copolymer adjuvant were prepared. Their physicochemical properties suggest that efficient complexation of nucleic acids was obtained, regardless of the nature of the cationic polymer and the nature of the nucleic acid. Finally, a synthetic approach was developed for the conjugation of an antibody fragment directed against the transferrin receptor via a labile disulfide bond at the end of the cationic copolymer. In conclusion, the work presented herein displays the versatility and potential of ternary PICMs as vehicles for the delivery of ONs and also provides a method for the conjugation of a ligand to generate targeted ternary PICMs.
Wang, Wei-Ting, and 王韋婷. "Development of Novel Polyion Complex Micelles for Antifungal Drug Delivery." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/30003756270917471965.
Full text國立清華大學
化學工程學系
95
A novel poly(2-ethyl-2-oxazoline)-block-poly(aspartic acid) (PEOz-b-PAsp) was synthesized and investigated as a potential carrier for the amphotericin B (AmB) delivery in forming polyion complex (PIC) micelles. Nano-scale AmB/PEOz-b-PAsp PIC micelles were prepared by thin film method. The nano-scale PIC micelles with core-shell structure were formed with a hydrophilic outer shell and dissociation of the carboxylic group from PAsp to become a hydrophobic inner core for drug delivery application. The resulting nano-scale PIC micelles with AmB and PEOz-b-PAsp showed an average diameter about 108 nm. The drug content of the PIC micelles can be as high as 47 % in phosphate buffer solution with pH 7.4. The release of AmB from nano-scale PIC micelles was 60 % at 40 h in phosphate buffer solution with pH 7.4. The minimal inhibitory concentration (MIC) of PIC micelles was 20μg/mL, and antifungal activity of PIC micelles was better than Fungizone® during 72 hrs. In conclusion, AmB/PEOz-b-PAsp PIC micelles were developed and optimized for drug delivery to allow efficient antifungal activity with low cytotoxicity. Engineering of biodegradable polymers to form non-covalent drug-polymer interactions of PIC micelles constitutes a useful approach for the future design of drug carriers. Keywords: Amphotericin B, Diblock copolymer, Polyion complex micelle, Drug controlled release, Antifungal activity.
Book chapters on the topic "Polyion complex micelle"
Jang, Woo Dong, Nobuhiro Nishiyama, and Kazunori Kataoka. "Preparation of Naphthalocyanine Dendrimer Loaded Polyion Complex Micelle for Photodynamic Therapy." In Advanced Biomaterials VII, 465–68. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-436-7.465.
Full textVong, Long Binh, and Yukio Nagasaki. "Redox Polyion Complex Micelle-Based Injectable Hydrogel as Local Reactive Oxygen Species Scavenging Therapeutics." In ACS Symposium Series, 287–307. Washington, DC: American Chemical Society, 2019. http://dx.doi.org/10.1021/bk-2019-1309.ch012.
Full textNguyen-Trinh, Quynh-Nhu, Nhu-Thuy Trinh, Hanh Thi Ngoc Nguyen, and Vong Binh Long. "Preparation of Trimethyl Chitosan-Based Polyion Complex Micelle as Drug Delivery System for Cancer Therapy." In IFMBE Proceedings, 293–300. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-75506-5_23.
Full textKim, Hyun Jin, Meng Zheng, Kanjiro Miyata, and Kazunori Kataoka. "Preparation of Polyion Complex Micelles Using Block Copolymers for SiRNA Delivery." In Methods in Molecular Biology, 89–103. New York, NY: Springer New York, 2016. http://dx.doi.org/10.1007/978-1-4939-3112-5_9.
Full textBailey-Hytholt, Christina M., Ramanathan Nagarajan, and Terri A. Camesano. "Förster Resonance Energy Transfer Probing of Assembly and Disassembly of Short Interfering RNA/Poly(ethylene glycol)–Poly-L-Lysine Polyion Complex Micelles." In ACS Symposium Series, 47–60. Washington, DC: American Chemical Society, 2020. http://dx.doi.org/10.1021/bk-2020-1355.ch004.
Full textHarada, Atsushi, and Kazunori Kataoka. "Polyion Complex Micelles." In Dekker Encyclopedia of Nanoscience and Nanotechnology, Second Edition - Six Volume Set (Print Version). CRC Press, 2004. http://dx.doi.org/10.1201/9781439834398.ch353.
Full textKataoka, Kazunori, and Atsushi Harada. "Polyion Complex Micelles." In Dekker Encyclopedia of Nanoscience and Nanotechnology, Second Edition - Six Volume Set (Print Version), 3409–16. CRC Press, 2008. http://dx.doi.org/10.1201/noe0849396397.ch298.
Full textConference papers on the topic "Polyion complex micelle"
Chen, Kuizhi, Ming Yu, Hong Zhang, Dongdong Ma, Shujuan Pang, Wei Huang, and Yiru Peng. "Polyion complex micelles incorporating poly (aryl benzyl ether) dendritic phthalocyanine: effective photosensitizers for enhanced photodynamic therapy." In Photonics Asia, edited by Qingming Luo, Ying Gu, and Xingde D. Li. SPIE, 2012. http://dx.doi.org/10.1117/12.2001194.
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