151
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152
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Gieseler D, Jordan R. Poly(2-oxazoline) molecular brushes by grafting through of poly(2-oxazoline)methacrylates with aqueous ATRP. Polym Chem 2015. [DOI: 10.1039/c5py00561b] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Well defined molecular brushes of poly(2-oxazoline)s were synthesized by ATRP of oligo- and poly(2-methyl-, 2-ethyl- and 2-isopropyl-2-oxazoline) macromonomers in aqueous solution.
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Affiliation(s)
- Dan Gieseler
- Professur für Makromolekulare Chemie
- Department Chemie
- Technische Universität Dresden
- 01069 Dresden
- Germany
| | - Rainer Jordan
- Professur für Makromolekulare Chemie
- Department Chemie
- Technische Universität Dresden
- 01069 Dresden
- Germany
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153
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Lowe S, O'Brien-Simpson NM, Connal LA. Antibiofouling polymer interfaces: poly(ethylene glycol) and other promising candidates. Polym Chem 2015. [DOI: 10.1039/c4py01356e] [Citation(s) in RCA: 330] [Impact Index Per Article: 36.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
This review highlights antibiofouling polymer interfaces with emphasis on the latest developments using poly(ethylene glycol) and the design new polymeric structures.
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Affiliation(s)
- Sean Lowe
- Department of Chemical and Biomolecular Engineering
- The University of Melbourne
- Victoria
- Australia 3010
| | | | - Luke A. Connal
- Department of Chemical and Biomolecular Engineering
- The University of Melbourne
- Victoria
- Australia 3010
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154
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Hartlieb M, Pretzel D, Wagner M, Hoeppener S, Bellstedt P, Görlach M, Englert C, Kempe K, Schubert US. Core cross-linked nanogels based on the self-assembly of double hydrophilic poly(2-oxazoline) block copolymers. J Mater Chem B 2015; 3:1748-1759. [DOI: 10.1039/c4tb02069c] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis of poly(2-oxazoline)-based block copolymers consisting of a cationic and a hydrophilic segment is described.
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Affiliation(s)
- Matthias Hartlieb
- Laboratory of Organic and Macromolecular Chemistry (IOMC)
- Friedrich Schiller University Jena
- Jena
- Germany
- Jena Center for Soft Matter (JCSM)
| | - David Pretzel
- Laboratory of Organic and Macromolecular Chemistry (IOMC)
- Friedrich Schiller University Jena
- Jena
- Germany
- Jena Center for Soft Matter (JCSM)
| | - Michael Wagner
- Laboratory of Organic and Macromolecular Chemistry (IOMC)
- Friedrich Schiller University Jena
- Jena
- Germany
- Jena Center for Soft Matter (JCSM)
| | - Stephanie Hoeppener
- Laboratory of Organic and Macromolecular Chemistry (IOMC)
- Friedrich Schiller University Jena
- Jena
- Germany
- Jena Center for Soft Matter (JCSM)
| | - Peter Bellstedt
- Biomolecular NMR Spectroscopy
- Leibniz Institute for Age Research – Fritz Lipmann Institute
- 07745 Jena
- Germany
| | - Matthias Görlach
- Biomolecular NMR Spectroscopy
- Leibniz Institute for Age Research – Fritz Lipmann Institute
- 07745 Jena
- Germany
| | - Christoph Englert
- Laboratory of Organic and Macromolecular Chemistry (IOMC)
- Friedrich Schiller University Jena
- Jena
- Germany
- Jena Center for Soft Matter (JCSM)
| | - Kristian Kempe
- Laboratory of Organic and Macromolecular Chemistry (IOMC)
- Friedrich Schiller University Jena
- Jena
- Germany
- Jena Center for Soft Matter (JCSM)
| | - Ulrich S. Schubert
- Laboratory of Organic and Macromolecular Chemistry (IOMC)
- Friedrich Schiller University Jena
- Jena
- Germany
- Jena Center for Soft Matter (JCSM)
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155
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Hartlieb M, Kempe K, Schubert US. Covalently cross-linked poly(2-oxazoline) materials for biomedical applications – from hydrogels to self-assembled and templated structures. J Mater Chem B 2015; 3:526-538. [DOI: 10.1039/c4tb01660b] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We discuss covalently cross-linked poly(2-oxazoline)s including gels, nanogels and capsules on the basis of their synthetic origin in a biomedical context.
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Affiliation(s)
- Matthias Hartlieb
- Laboratory of Organic and Macromolecular Chemistry (IOMC)
- Friedrich Schiller University Jena
- Jena
- Germany
- Jena Center for Soft Matter (JCSM)
| | - Kristian Kempe
- Laboratory of Organic and Macromolecular Chemistry (IOMC)
- Friedrich Schiller University Jena
- Jena
- Germany
- Jena Center for Soft Matter (JCSM)
| | - Ulrich S. Schubert
- Laboratory of Organic and Macromolecular Chemistry (IOMC)
- Friedrich Schiller University Jena
- Jena
- Germany
- Jena Center for Soft Matter (JCSM)
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156
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Fetsch C, Flecks S, Gieseler D, Marschelke C, Ulbricht J, van Pée KH, Luxenhofer R. Self-Assembly of Amphiphilic Block Copolypeptoids with C2
-C5
Side Chains in Aqueous Solution. MACROMOL CHEM PHYS 2014. [DOI: 10.1002/macp.201400534] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Corinna Fetsch
- Functional Polymer Materials; Chair for Chemical Technology of Materials Synthesis; University Würzburg; Röntgenring 11 97070 Würzburg Germany
| | - Silvana Flecks
- Professur für Allgemeine Biochemie; Department Chemie; Technische Universität Dresden; Bergstr. 66 01069 Dresden Germany
| | - Dan Gieseler
- Professur für Makromolekulare Chemie; Department Chemie; Technische Universität Dresden; Mommsenstr. 4 01069 Dresden Germany
| | - Claudia Marschelke
- Professur für Makromolekulare Chemie; Department Chemie; Technische Universität Dresden; Mommsenstr. 4 01069 Dresden Germany
| | - Juliane Ulbricht
- Functional Polymer Materials; Chair for Chemical Technology of Materials Synthesis; University Würzburg; Röntgenring 11 97070 Würzburg Germany
| | - Karl-Heinz van Pée
- Professur für Allgemeine Biochemie; Department Chemie; Technische Universität Dresden; Bergstr. 66 01069 Dresden Germany
| | - Robert Luxenhofer
- Functional Polymer Materials; Chair for Chemical Technology of Materials Synthesis; University Würzburg; Röntgenring 11 97070 Würzburg Germany
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157
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Legros C, Wirotius AL, De Pauw-Gillet MC, Tam KC, Taton D, Lecommandoux S. Poly(2-oxazoline)-based nanogels as biocompatible pseudopolypeptide nanoparticles. Biomacromolecules 2014; 16:183-91. [PMID: 25409266 DOI: 10.1021/bm501393q] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Hydrophilic nanogels based on partially hydrolyzed poly(2-ethyl-2-oxazoline) were synthesized in dilute aqueous media in the presence of 1,6-hexanediol diglycidyl ether as a cross-linker. Nanogel formation was monitored by DLS and HSQC NMR spectroscopy, and the final nano-objects were characterized by DLS, TEM, AFM, and NanoSight analyses. Nanogels with a hydrodynamic radius of 78 nm exhibiting a slight positive surface charge were obtained. MTS assays (cell metabolic activity test) evidenced that nanogels were nontoxic in the investigated concentration range (i.e., 0.1 to 400 μg/mL) and that no specific interaction with bovine serum albumin was observed.
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Affiliation(s)
- Camille Legros
- Université de Bordeaux , UMR5629, ENSCPB, 16 Avenue Pey Berland, 33607 Pessac Cedex, France
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158
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159
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Wang J, Cui S, Bao Y, Xing J, Hao W. Tocopheryl pullulan-based self assembling nanomicelles for anti-cancer drug delivery. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 43:614-21. [DOI: 10.1016/j.msec.2014.07.066] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2014] [Revised: 06/25/2014] [Accepted: 07/27/2014] [Indexed: 01/01/2023]
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160
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Jokerst JV, Van de Sompel D, Bohndiek SE, Gambhir SS. Cellulose Nanoparticles are a Biodegradable Photoacoustic Contrast Agent for Use in Living Mice. PHOTOACOUSTICS 2014; 2:119-127. [PMID: 25225633 PMCID: PMC4161983 DOI: 10.1016/j.pacs.2014.07.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2013] [Revised: 04/04/2014] [Accepted: 07/16/2014] [Indexed: 05/29/2023]
Abstract
Molecular imaging with photoacoustic ultrasound is an emerging field that combines the spatial and temporal resolution of ultrasound with the contrast of optical imaging. However, there are few imaging agents that offer both high signal intensity and biodegradation into small molecules. Here we describe a cellulose-based nanoparticle with peak photoacoustic signal at 700 nm and an in vitro limit of detection of 6 pM (0.02 mg/mL). Doses down to 0.35 nM (1.2 mg/mL) were used to image mouse models of ovarian cancer. Most importantly, the nanoparticles were shown to biodegrade in the presence of cellulase both through a glucose assay and electron microscopy.
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Affiliation(s)
- Jesse V. Jokerst
- Molecular Imaging Program at Stanford (MIPS), Department of Radiology, Stanford University, 318 Campus Drive, Stanford, CA 94305-5427, United States1
| | - Dominique Van de Sompel
- Molecular Imaging Program at Stanford (MIPS), Department of Radiology, Stanford University, 318 Campus Drive, Stanford, CA 94305-5427, United States1
| | - Sarah E. Bohndiek
- Molecular Imaging Program at Stanford (MIPS), Department of Radiology, Stanford University, 318 Campus Drive, Stanford, CA 94305-5427, United States1
- Bioengineering, Materials Science & Engineering, Bio-X Stanford University, Stanford, CA 94305, United States
| | - Sanjiv S. Gambhir
- Molecular Imaging Program at Stanford (MIPS), Department of Radiology, Stanford University, 318 Campus Drive, Stanford, CA 94305-5427, United States1
- Bioengineering, Materials Science & Engineering, Bio-X Stanford University, Stanford, CA 94305, United States
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161
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Kostova B, Ivanova S, Balashev K, Rachev D, Christova D. Evaluation of poly(2-ethyl-2-oxazoline) containing copolymer networks of varied composition as sustained metoprolol tartrate delivery systems. AAPS PharmSciTech 2014; 15:939-46. [PMID: 24789663 DOI: 10.1208/s12249-014-0120-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2014] [Accepted: 03/31/2014] [Indexed: 11/30/2022] Open
Abstract
Segmented copolymer networks (SCN) based on poly(2-ethyl-2-oxazoline) and containing 2-hydroxyethyl methacrylate, 2-hydroxypropyl acrylate, and/or methyl methacrylate segments have been evaluated as potential sustained release systems of the water soluble cardioselective β-blocker metoprolol tartrate. The structure and properties of the drug carriers were investigated by differential scanning calorimetry, attenuated total reflectance Fourier transform infrared spectroscopy, scanning electron microscopy, and atomic force microscopy. Swelling kinetics of SCNs in various media was followed, and the conditions for effective MT loading were specified. MT-loaded SCNs with drug content up to 80 wt.% were produced. The release kinetics of metoprolol tartrate from the systems was studied and it was shown that the conetworks of different structure and composition are able to sustain the metoprolol tartrate release without additional excipients.
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162
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Yi X, Kabanov AV. Brain delivery of proteins via their fatty acid and block copolymer modifications. J Drug Target 2014; 21:940-55. [PMID: 24160902 DOI: 10.3109/1061186x.2013.847098] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
It is well known that hydrophobic small molecules penetrate cell membranes better than hydrophilic molecules. Amphiphilic molecules that dissolve both in lipid and aqueous phases are best suited for membrane transport. Transport of biomacromolecules across physiological barriers, e.g. the blood-brain barrier, is greatly complicated by the unique structure and function of such barriers. Two decades ago we adopted a simple philosophy that to increase protein delivery to the brain one needs to modify this protein with hydrophobic moieties. With this general idea we began modifying proteins (antibodies, enzymes, hormones, etc.) with either hydrophobic fatty acid residues or amphiphilic block copolymer moieties, such as poy(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) (pluronics or poloxamers) and more recently, poly(2-oxasolines). This simple approach has resulted in impressive successes in CNS drug delivery. We present a retrospective overview of these works initiated in the Soviet Union in 1980s, and then continued in the United States and other countries. Notably some of the early findings were later corroborated by brain pharmacokinetic data. Industrial development of several drug candidates employing these strategies has followed. Overall modification by hydrophobic fatty acids residues or amphiphilic block copolymers represents a promising and relatively safe strategy to deliver proteins to the brain.
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Affiliation(s)
- Xiang Yi
- Division of Molecular Pharmaceutics and Center for Nanotechnology in Drug Delivery, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill , Chapel Hill, NC , USA and
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163
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Agile delivery of protein therapeutics to CNS. J Control Release 2014; 190:637-63. [PMID: 24956489 DOI: 10.1016/j.jconrel.2014.06.017] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2014] [Revised: 06/10/2014] [Accepted: 06/13/2014] [Indexed: 12/11/2022]
Abstract
A variety of therapeutic proteins have shown potential to treat central nervous system (CNS) disorders. Challenge to deliver these protein molecules to the brain is well known. Proteins administered through parenteral routes are often excluded from the brain because of their poor bioavailability and the existence of the blood-brain barrier (BBB). Barriers also exist to proteins administered through non-parenteral routes that bypass the BBB. Several strategies have shown promise in delivering proteins to the brain. This review, first, describes the physiology and pathology of the BBB that underscore the rationale and needs of each strategy to be applied. Second, major classes of protein therapeutics along with some key factors that affect their delivery outcomes are presented. Third, different routes of protein administration (parenteral, central intracerebroventricular and intraparenchymal, intranasal and intrathecal) are discussed along with key barriers to CNS delivery associated with each route. Finally, current delivery strategies involving chemical modification of proteins and use of particle-based carriers are overviewed using examples from literature and our own work. Whereas most of these studies are in the early stage, some provide proof of mechanism of increased protein delivery to the brain in relevant models of CNS diseases, while in few cases proof of concept had been attained in clinical studies. This review will be useful to broad audience of students, academicians and industry professionals who consider critical issues of protein delivery to the brain and aim developing and studying effective brain delivery systems for protein therapeutics.
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164
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Ulbricht J, Jordan R, Luxenhofer R. On the biodegradability of polyethylene glycol, polypeptoids and poly(2-oxazoline)s. Biomaterials 2014; 35:4848-61. [DOI: 10.1016/j.biomaterials.2014.02.029] [Citation(s) in RCA: 188] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2014] [Accepted: 02/16/2014] [Indexed: 10/25/2022]
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165
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de la Rosa VR. Poly(2-oxazoline)s as materials for biomedical applications. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2014; 25:1211-1225. [PMID: 23975334 DOI: 10.1007/s10856-013-5034-y] [Citation(s) in RCA: 120] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2012] [Accepted: 08/14/2013] [Indexed: 06/02/2023]
Abstract
The conjunction of polymers and medicine enables the development of new materials that display novel features, opening new ways to administrate drugs, design implants and biosensors, to deliver pharmaceuticals impacting cancer treatment, regenerative medicine or gene therapy. Poly(2-oxazoline)s (POx) constitute a polymer class with exceptional properties for their use in a plethora of different biomedical applications and are proposed as a versatile platform for the development of new medicine. Herein, a global vision of POx as a platform for novel biomaterials is offered, by highlighting the recent advances and breakthroughs in this fascinating field.
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Affiliation(s)
- Victor R de la Rosa
- Supramolecular Chemistry Group, Department of Organic Chemistry, Ghent University, Krijgslaan 281-S4, 9000, Ghent, Belgium,
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166
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Schulz A, Jaksch S, Schubel R, Wegener E, Di Z, Han Y, Meister A, Kressler J, Kabanov AV, Luxenhofer R, Papadakis CM, Jordan R. Drug-induced morphology switch in drug delivery systems based on poly(2-oxazoline)s. ACS NANO 2014; 8:2686-96. [PMID: 24548260 PMCID: PMC4004286 DOI: 10.1021/nn406388t] [Citation(s) in RCA: 93] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2013] [Accepted: 02/18/2014] [Indexed: 05/21/2023]
Abstract
Defined aggregates of polymers such as polymeric micelles are of great importance in the development of pharmaceutical formulations. The amount of drug that can be formulated by a drug delivery system is an important issue, and most drug delivery systems suffer from their relatively low drug-loading capacity. However, as the loading capacities increase, i.e., promoted by good drug-polymer interactions, the drug may affect the morphology and stability of the micellar system. We investigated this effect in a prominent system with very high capacity for hydrophobic drugs and found extraordinary stability as well as a profound morphology change upon incorporation of paclitaxel into micelles of amphiphilic ABA poly(2-oxazoline) triblock copolymers. The hydrophilic blocks A comprised poly(2-methyl-2-oxazoline), while the middle blocks B were either just barely hydrophobic poly(2-n-butyl-2-oxazoline) or highly hydrophobic poly(2-n-nonyl-2-oxazoline). The aggregation behavior of both polymers and their formulations with varying paclitaxel contents were investigated by means of dynamic light scattering, atomic force microscopy, (cryogenic) transmission electron microscopy, and small-angle neutron scattering. While without drug, wormlike micelles were present, after incorporation of small amounts of drugs only spherical morphologies remained. Furthermore, the much more hydrophobic poly(2-n-nonyl-2-oxazoline)-containing triblock copolymer exhibited only half the capacity for paclitaxel than the poly(2-n-butyl-2-oxazoline)-containing copolymer along with a lower stability. In the latter, contents of paclitaxel of 8 wt % or higher resulted in a raspberry-like micellar core.
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Affiliation(s)
- Anita Schulz
- Professur für Makromolekulare Chemie, Department Chemie, Technische Universität Dresden, Mommsenstraße 4, 01069 Dresden, Germany
| | - Sebastian Jaksch
- Physik-Department, Fachgebiet Physik weicher Materie, Technische Universität München, James-Franck-Straße 1, 85748 Garching, Germany
| | - Rene Schubel
- Professur für Makromolekulare Chemie, Department Chemie, Technische Universität Dresden, Mommsenstraße 4, 01069 Dresden, Germany
| | - Erik Wegener
- Professur für Makromolekulare Chemie, Department Chemie, Technische Universität Dresden, Mommsenstraße 4, 01069 Dresden, Germany
| | - Zhenyu Di
- Jülich Centre for Neutron Science (JCNS), Forschungszentrum Jülich GmbH, Outstation at MLZ, Lichtenbergstraße 1, 85747 Garching, Germany
| | - Yingchao Han
- Biomedical Materials and Engineering Center, Wuhan University of Technology, Wuhan 430070, People’s Republic of China
| | - Annette Meister
- Physikalische Chemie der Polymere, Martin-Luther-Universität Halle-Wittenberg, Von-Danckelmann-Platz 4, 06099 Halle, Germany
| | - Jörg Kressler
- Physikalische Chemie der Polymere, Martin-Luther-Universität Halle-Wittenberg, Von-Danckelmann-Platz 4, 06099 Halle, Germany
| | - Alexander V. Kabanov
- UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Robert Luxenhofer
- Functional Polymer Materials, Chair of Chemical Technology of Materials Synthesis, University Würzburg, Röntgenring 11, 97070 Würzburg, Germany
| | - Christine M. Papadakis
- Physik-Department, Fachgebiet Physik weicher Materie, Technische Universität München, James-Franck-Straße 1, 85748 Garching, Germany
| | - Rainer Jordan
- Professur für Makromolekulare Chemie, Department Chemie, Technische Universität Dresden, Mommsenstraße 4, 01069 Dresden, Germany
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167
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Tauhardt L, Pretzel D, Kempe K, Gottschaldt M, Pohlers D, Schubert US. Zwitterionic poly(2-oxazoline)s as promising candidates for blood contacting applications. Polym Chem 2014. [DOI: 10.1039/c4py00434e] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The hemocompatibility and cytotoxicity of zwitterionic poly(2-oxazoline)s are investigated.
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Affiliation(s)
- Lutz Tauhardt
- Laboratory of Organic and Macromolecular Chemistry (IOMC)
- Friedrich Schiller University Jena
- 07743 Jena, Germany
- Jena Center for Soft Matter (JCSM)
- Friedrich Schiller University Jena
| | - David Pretzel
- Laboratory of Organic and Macromolecular Chemistry (IOMC)
- Friedrich Schiller University Jena
- 07743 Jena, Germany
- Jena Center for Soft Matter (JCSM)
- Friedrich Schiller University Jena
| | - Kristian Kempe
- Laboratory of Organic and Macromolecular Chemistry (IOMC)
- Friedrich Schiller University Jena
- 07743 Jena, Germany
- Jena Center for Soft Matter (JCSM)
- Friedrich Schiller University Jena
| | - Michael Gottschaldt
- Laboratory of Organic and Macromolecular Chemistry (IOMC)
- Friedrich Schiller University Jena
- 07743 Jena, Germany
- Jena Center for Soft Matter (JCSM)
- Friedrich Schiller University Jena
| | - Dirk Pohlers
- Centre for Diagnostic at the Clinic of Chemnitz
- 09116 Chemnitz, Germany
| | - Ulrich S. Schubert
- Laboratory of Organic and Macromolecular Chemistry (IOMC)
- Friedrich Schiller University Jena
- 07743 Jena, Germany
- Jena Center for Soft Matter (JCSM)
- Friedrich Schiller University Jena
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168
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Oberoi HS, Nukolova NV, Kabanov AV, Bronich TK. Nanocarriers for delivery of platinum anticancer drugs. Adv Drug Deliv Rev 2013; 65:1667-85. [PMID: 24113520 PMCID: PMC4197009 DOI: 10.1016/j.addr.2013.09.014] [Citation(s) in RCA: 298] [Impact Index Per Article: 27.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2013] [Revised: 09/19/2013] [Accepted: 09/25/2013] [Indexed: 12/18/2022]
Abstract
Platinum based anticancer drugs have revolutionized cancer chemotherapy, and continue to be in widespread clinical use especially for management of tumors of the ovary, testes, and the head and neck. However, several dose limiting toxicities associated with platinum drug use, partial anti-tumor response in most patients, development of drug resistance, tumor relapse, and many other challenges have severely limited the patient quality of life. These limitations have motivated an extensive research effort towards development of new strategies for improving platinum therapy. Nanocarrier-based delivery of platinum compounds is one such area of intense research effort beginning to provide encouraging preclinical and clinical results and may allow the development of the next generation of platinum chemotherapy. This review highlights current understanding on the pharmacology and limitations of platinum compounds in clinical use, and provides a comprehensive analysis of various platinum-polymer complexes, micelles, dendrimers, liposomes and other nanoparticles currently under investigation for delivery of platinum drugs.
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Affiliation(s)
- Hardeep S. Oberoi
- Department of Pharmaceutical Sciences and Center for Drug Delivery and Nanomedicine, College of Pharmacy, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Natalia V. Nukolova
- Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskie Gory, Moscow 119992, Russia
- Russian State Medical University, Department of Medical Nanobiotechnology, Ostrovityanova 1, Moscow 117997, Russia
| | - Alexander V. Kabanov
- Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskie Gory, Moscow 119992, Russia
- Center for Nanotechnology in Drug Delivery and Division of Molecular Therapeutics, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, NC 27599, USA
| | - Tatiana K. Bronich
- Department of Pharmaceutical Sciences and Center for Drug Delivery and Nanomedicine, College of Pharmacy, University of Nebraska Medical Center, Omaha, NE 68198, USA
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169
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Zhao Y, Alakhova DY, Kabanov AV. Can nanomedicines kill cancer stem cells? Adv Drug Deliv Rev 2013; 65:1763-83. [PMID: 24120657 DOI: 10.1016/j.addr.2013.09.016] [Citation(s) in RCA: 96] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2013] [Revised: 09/30/2013] [Accepted: 09/30/2013] [Indexed: 12/12/2022]
Abstract
Most tumors are heterogeneous and many cancers contain small population of highly tumorigenic and intrinsically drug resistant cancer stem cells (CSCs). Like normal stem cell, CSCs have the ability to self-renew and differentiate to other tumor cell types. They are believed to be a source for drug resistance, tumor recurrence and metastasis. CSCs often overexpress drug efflux transporters, spend most of their time in non-dividing G0 cell cycle state, and therefore, can escape the conventional chemotherapies. Thus, targeting CSCs is essential for developing novel therapies to prevent cancer relapse and emerging of drug resistance. Nanocarrier-based therapeutic agents (nanomedicines) have been used to achieve longer circulation times, better stability and bioavailability over current therapeutics. Recently, some groups have successfully applied nanomedicines to target CSCs to eliminate the tumor and prevent its recurrence. These approaches include 1) delivery of therapeutic agents (small molecules, siRNA, antibodies) that affect embryonic signaling pathways implicated in self-renewal and differentiation in CSCs, 2) inhibiting drug efflux transporters in an attempt to sensitize CSCs to therapy, 3) targeting metabolism in CSCs through nanoformulated chemicals and field-responsive magnetic nanoparticles and carbon nanotubes, and 4) disruption of multiple pathways in drug resistant cells using combination of chemotherapeutic drugs with amphiphilic Pluronic block copolymers. Despite clear progress of these studies the challenges of targeting CSCs by nanomedicines still exist and leave plenty of room for improvement and development. This review summarizes biological processes that are related to CSCs, overviews the current state of anti-CSCs therapies, and discusses state-of-the-art nanomedicine approaches developed to kill CSCs.
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170
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Kuang H, He H, Hou J, Xie Z, Jing X, Huang Y. Thymine modified amphiphilic biodegradable copolymers for photo-cross-linked micelles as stable drug carriers. Macromol Biosci 2013; 13:1593-600. [PMID: 23966335 DOI: 10.1002/mabi.201300254] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2013] [Revised: 06/24/2013] [Indexed: 11/10/2022]
Abstract
A photo-cross-linked micelle is synthesized via photodimerization of thymine moieties fabricated from amphiphilic block copolymers (mPEG-b-P(LA-co-MPT). The crosslinking behavior is monitored by UV-Vis spectra and (1) H NMR. Dynamic light scattering (DLS) and transmission electron microscopy (TEM) showed that cross-linked micelles had smaller sizes than their uncross-linked precursors. In vitro studies reveal that cross-linking of the micelle cores results in a slow drug release and faster cellular uptake in comparison with uncross-linked ones in MCF-7 and Hela cells. Moreover, the paclitaxel (PTX)-loaded core-cross-linked micelles exhibit similar anticancer efficacy as free PTX. This work provides a convenient tool for designing a more stable structure in the blood circulation to realize a controlled drug delivery.
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Affiliation(s)
- Huihui Kuang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China; Graduate School of Chinese Academy of Sciences, Beijing, 100049, China
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171
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Comparison of ESI, APCI and MALDI for the (tandem) mass analysis of poly(2-ethyl-2-oxazoline)s with various end-groups. Eur Polym J 2013. [DOI: 10.1016/j.eurpolymj.2013.02.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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172
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173
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Knop K, Pretzel D, Urbanek A, Rudolph T, Scharf DH, Schallon A, Wagner M, Schubert S, Kiehntopf M, Brakhage AA, Schacher FH, Schubert US. Star-Shaped Drug Carriers for Doxorubicin with POEGMA and POEtOxMA Brush-like Shells: A Structural, Physical, and Biological Comparison. Biomacromolecules 2013; 14:2536-48. [DOI: 10.1021/bm400091n] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Katrin Knop
- Laboratory of Organic
and Macromolecular
Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstrasse 10, 07743 Jena, Germany
- Jena Center for Soft Matter
(JCSM), Friedrich Schiller University Jena, Philosophenweg 8, 07743 Jena, Germany
| | - David Pretzel
- Laboratory of Organic
and Macromolecular
Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstrasse 10, 07743 Jena, Germany
- Jena Center for Soft Matter
(JCSM), Friedrich Schiller University Jena, Philosophenweg 8, 07743 Jena, Germany
| | - Annett Urbanek
- Laboratory of Organic
and Macromolecular
Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstrasse 10, 07743 Jena, Germany
- Jena Center for Soft Matter
(JCSM), Friedrich Schiller University Jena, Philosophenweg 8, 07743 Jena, Germany
| | - Tobias Rudolph
- Laboratory of Organic
and Macromolecular
Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstrasse 10, 07743 Jena, Germany
- Jena Center for Soft Matter
(JCSM), Friedrich Schiller University Jena, Philosophenweg 8, 07743 Jena, Germany
| | - Daniel H. Scharf
- Leibniz Institute for Natural
Product Research and Infection Biology, Hans Knöll Institute, Beutenbergstrasse 11a, 07745 Jena, Germany
| | - Anja Schallon
- Laboratory of Organic
and Macromolecular
Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstrasse 10, 07743 Jena, Germany
- Jena Center for Soft Matter
(JCSM), Friedrich Schiller University Jena, Philosophenweg 8, 07743 Jena, Germany
| | - Michael Wagner
- Laboratory of Organic
and Macromolecular
Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstrasse 10, 07743 Jena, Germany
- Jena Center for Soft Matter
(JCSM), Friedrich Schiller University Jena, Philosophenweg 8, 07743 Jena, Germany
| | - Stephanie Schubert
- Jena Center for Soft Matter
(JCSM), Friedrich Schiller University Jena, Philosophenweg 8, 07743 Jena, Germany
- Department of Pharmaceutical
Technology, Institute of Pharmacy, Friedrich-Schiller-University Jena, Otto-Schott-Strasse 41, 07745 Jena, Germany
| | - Michael Kiehntopf
- Institute for Clinical Chemistry
and Laboratory Diagnostics, Jena University Hospital, Erlanger Allee 101, 07740 Jena, Germany
| | - Axel A. Brakhage
- Jena Center for Soft Matter
(JCSM), Friedrich Schiller University Jena, Philosophenweg 8, 07743 Jena, Germany
- Leibniz Institute for Natural
Product Research and Infection Biology, Hans Knöll Institute, Beutenbergstrasse 11a, 07745 Jena, Germany
| | - Felix H. Schacher
- Laboratory of Organic
and Macromolecular
Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstrasse 10, 07743 Jena, Germany
- Jena Center for Soft Matter
(JCSM), Friedrich Schiller University Jena, Philosophenweg 8, 07743 Jena, Germany
| | - Ulrich S. Schubert
- Laboratory of Organic
and Macromolecular
Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstrasse 10, 07743 Jena, Germany
- Jena Center for Soft Matter
(JCSM), Friedrich Schiller University Jena, Philosophenweg 8, 07743 Jena, Germany
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174
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Zhang N, Salzinger S, Soller BS, Rieger B. Rare earth metal-mediated group-transfer polymerization: from defined polymer microstructures to high-precision nano-scaled objects. J Am Chem Soc 2013; 135:8810-3. [PMID: 23734723 DOI: 10.1021/ja4036175] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Poly(2-isopropenyl-2-oxazoline) (PIPOx) and poly(2-vinylpyridine) (P2VP) have been efficiently synthesized using bis(cyclopentadienyl)methylytterbium (Cp2YbMe) as catalyst. The polymerizations of 2-isopropenyl-2-oxazoline (IPOx) and 2-vinylpyridine (2VP) follow a living group-transfer polymerization (GTP) mechanism, allowing a precise molecular-weight control of both polymers with very narrow molecular-weight distribution. The GTP of IPOx and 2VP occurs via N coordination at the rare earth metal center, which has rarely been reported previously. The relative coordination strength of different monomers at the ytterbium center is determined by copolymerization investigations to be in the order of DEVP > MMA > IPOx > 2VP. In combination with living cationic ring-opening polymerization, PIPOx is converted to molecular brushes with defined backbone and poly(2-oxazoline) side chains using the grafting-from method.
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Affiliation(s)
- Ning Zhang
- Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China.
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175
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Krumm C, Konieczny S, Dropalla GJ, Milbradt M, Tiller JC. Amphiphilic Polymer Conetworks Based on End Group Cross-Linked Poly(2-oxazoline) Homo- and Triblock Copolymers. Macromolecules 2013. [DOI: 10.1021/ma4004665] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Christian Krumm
- Biomaterials and Polymer Science,
Department of Biochemical
and Chemical Engineering, TU Dortmund,
Emil-Figge-Straße 66, 44227 Dortmund, Germany
| | - Stefan Konieczny
- Biomaterials and Polymer Science,
Department of Biochemical
and Chemical Engineering, TU Dortmund,
Emil-Figge-Straße 66, 44227 Dortmund, Germany
| | - Georg J. Dropalla
- Biomaterials and Polymer Science,
Department of Biochemical
and Chemical Engineering, TU Dortmund,
Emil-Figge-Straße 66, 44227 Dortmund, Germany
| | - Marc Milbradt
- Biomaterials and Polymer Science,
Department of Biochemical
and Chemical Engineering, TU Dortmund,
Emil-Figge-Straße 66, 44227 Dortmund, Germany
| | - Joerg C. Tiller
- Biomaterials and Polymer Science,
Department of Biochemical
and Chemical Engineering, TU Dortmund,
Emil-Figge-Straße 66, 44227 Dortmund, Germany
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176
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Sosnik A. Temperature- and pH-sensitive Polymeric Micelles for Drug Encapsulation, Release and Targeting. SMART MATERIALS FOR DRUG DELIVERY 2013. [DOI: 10.1039/9781849736800-00115] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
More than 50% of the drugs in the market and 70% of the new candidates are poorly water soluble according to the Biopharmaceutic Classification System (BCS(. Poor aqueous solubility and physico-chemical stability of drugs in biological fluids remain key limitations in oral, parenteral and transdermal administration and contribute to an increase the drug attrition rate. Motivated by the outbreak of nanotechnology, different nanocarriers made of lipids and polymers have been designed and developed to address these limitations. Moreover, robust platforms were exploited to achieve the temporal and spatial release of drugs, thus constraining the systemic exposure to toxic agents and the appearance of severe adverse effects and improving the safety ratio. Owing to unique features such as (i( great chemical flexibility, (ii( capacity to host, solubilize and physico-chemically stabilize poorly water soluble drugs, (iii( ability to accumulate selectively in highly vascularized solid tumors and (iv( ability of single amphiphile molecules (unimers( to inhibit the activity of different pumps of the ATP-binding cassette superfamily (ABCs(, polymeric micelles have emerged as one of the most versatile nanotechnologies. Despite their diverse applications to improve the therapeutic outcomes, polymeric micelles remain clinically uncapitalized. The present chapter overviews the most recent applications of temperature- and pH-responsive polymeric micelles for the encapsulation, release and targeting of drugs and discusses the perspectives for these unique nanocarriers in the near future.
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Affiliation(s)
- Alejandro Sosnik
- The Group of Biomaterials and Nanotechnology for Improved Medicines (BIONIMED) Department of Pharmaceutical Technology, Faculty of Pharmacy and Biochemistry, University of Buenos Aires, 956 Junín St., Buenos Aires CP1113 Argentina and National Science Research Council (CONICET) Buenos Aires, Argentina
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177
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Kostova B, Ivanova-Mileva K, Rachev D, Christova D. Study of the potential of amphiphilic conetworks based on poly(2-ethyl-2-oxazoline) as new platforms for delivery of drugs with limited solubility. AAPS PharmSciTech 2013; 14:352-9. [PMID: 23325383 DOI: 10.1208/s12249-013-9923-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2012] [Accepted: 01/07/2013] [Indexed: 12/30/2022] Open
Abstract
Thermoresponsive amphiphilic conetworks comprising poly(2-ethyl-2-oxazoline) (PEtOx), 2-hydroxyethyl methacrylate, and 2-hydroxypropyl acrylate segments have been studied as new platforms for delivery of drug with limited solubility. Series of conetworks of varied composition were synthesized and swelling kinetics in aqueous media and ethanol were followed. The platforms were loaded with the hydrophobic drug ibuprofen by swelling in its ethanol solution. The structure and properties of the drug carriers were investigated by scanning electron microscopy and differential scanning calorimetry. The release kinetics profiles of ibuprofen from the studied platform were established. The investigation proved the feasibility of the PEtOx-based amphiphilic conetworks as highly effective platforms for sustained ibuprofen delivery.
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178
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Bauer M, Schroeder S, Tauhardt L, Kempe K, Schubert US, Fischer D. In vitrohemocompatibility and cytotoxicity study of poly(2-methyl-2-oxazoline) for biomedical applications. ACTA ACUST UNITED AC 2013. [DOI: 10.1002/pola.26564] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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179
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Kempe K, Onbulak S, Schubert US, Sanyal A, Hoogenboom R. pH degradable dendron-functionalized poly(2-ethyl-2-oxazoline) prepared by a cascade “double-click” reaction. Polym Chem 2013. [DOI: 10.1039/c3py00258f] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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180
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Tong J, Yi X, Luxenhofer R, Banks WA, Jordan R, Zimmerman MC, Kabanov AV. Conjugates of superoxide dismutase 1 with amphiphilic poly(2-oxazoline) block copolymers for enhanced brain delivery: synthesis, characterization and evaluation in vitro and in vivo. Mol Pharm 2012; 10:360-77. [PMID: 23163230 DOI: 10.1021/mp300496x] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Superoxide dismutase 1 (SOD1) efficiently catalyzes dismutation of superoxide, but its poor delivery to the target sites in the body, such as brain, hinders its use as a therapeutic agent for superoxide-associated disorders. Here to enhance the delivery of SOD1 across the blood-brain barrier (BBB) and in neurons the enzyme was conjugated with poly(2-oxazoline) (POx) block copolymers, P(MeOx-b-BuOx) or P(EtOx-b-BuOx), composed of (1) hydrophilic 2-methyl-2-oxazoline (MeOx) or 2-ethyl-2-oxazoline (EtOx) and (2) hydrophobic 2-butyl-2-oxazoline (BuOx) repeating units. The conjugates contained from 2 to 3 POx chains joining the protein amino groups via cleavable -(ss)- or noncleavable -(cc)- linkers at the BuOx block terminus. They retained 30% to 50% of initial SOD1 activity, were conformationally and thermally stable, and assembled in 8 or 20 nm aggregates in aqueous solution. They had little if any toxicity to CATH.a neurons and displayed enhanced uptake in these neurons as compared to native or PEGylated SOD1. Of the two conjugates, SOD1-(cc)-P(MeOx-b-BuOx) and SOD1-(cc)-P(EtOx-b-BuOx), compared, the latter was entering cells 4 to 7 times faster and at 6 h colocalized predominantly with endoplasmic reticulum (41 ± 3%) and mitochondria (21 ± 2%). Colocalization with endocytosis markers and pathway inhibition assays suggested that it was internalized through lipid raft/caveolae, also employed by the P(EtOx-b-BuOx) copolymer. The SOD activity in cell lysates and ability to attenuate angiotensin II (Ang II)-induced superoxide in live cells were increased for this conjugate compared to SOD1 and PEG-SOD1. Studies in mice showed that SOD1-POx had ca. 1.75 times longer half-life in blood than native SOD1 (28.4 vs 15.9 min) and after iv administration penetrated the BBB significantly faster than albumin to accumulate in brain parenchyma. The conjugate maintained high stability both in serum and in brain (77% vs 84% at 1 h postinjection). Its amount taken up by the brain reached a maximum value of 0.08% ID/g (percent of the injected dose taken up per gram of brain) 4 h postinjection. The entry of SOD1-(cc)-P(EtOx-b-BuOx) to the brain was mediated by a nonsaturable mechanism. Altogether, SOD1-POx conjugates are promising candidates as macromolecular antioxidant therapies for superoxide-associated diseases such as Ang II-induced neurocardiovascular diseases.
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Affiliation(s)
- Jing Tong
- Center for Drug Delivery and Nanomedicine, Department of Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, Nebraska 68198, United States
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181
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Luxenhofer R, Huber S, Hytry J, Tong J, Kabanov AV, Jordan R. Chiral and water-soluble poly(2-oxazoline)s. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/pola.26437] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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182
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Luxenhofer R, Han Y, Schulz A, Tong J, He Z, Kabanov AV, Jordan R. Poly(2-oxazoline)s as polymer therapeutics. Macromol Rapid Commun 2012; 33:1613-31. [PMID: 22865555 PMCID: PMC3608391 DOI: 10.1002/marc.201200354] [Citation(s) in RCA: 325] [Impact Index Per Article: 27.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2012] [Revised: 06/12/2012] [Indexed: 01/21/2023]
Abstract
Poly(2-oxazoline)s (POx) are currently discussed as an upcoming polymer platform for biomaterials design and especially for polymer therapeutics. POx meet specific requirements needed for the development of next-generation polymer therapeutics such as biocompatibility, high modulation of solubility, variation of size, architecture as well as chemical functionality. Although in the early 1990s first and promising POx-based systems were presented, the field lay dormant for almost two decades. Only very recently, POx-based polymer therapeutics came back into the focus of very intensive research. In this review, we give an overview on the chemistry and physicochemical properties of POx and summarize the research of POx-protein conjugates, POx-drug conjugates, POx-based polyplexes and POx micelles for drug delivery.
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Affiliation(s)
- Robert Luxenhofer
- Professur für Makromolekulare Chemie, Department Chemie, Technische Universität Dresden, Zellescher Weg 19, 01069 Dresden, Germany
| | - Yingchao Han
- Center for Drug Delivery and Nanomedicine and Department of Pharmaceutical Sciences, College of Pharmacy, University of Nebraska Medical Center, Omaha, NE 68198-5830, U.S.A
| | - Anita Schulz
- Professur für Makromolekulare Chemie, Department Chemie, Technische Universität Dresden, Zellescher Weg 19, 01069 Dresden, Germany
| | - Jing Tong
- Center for Drug Delivery and Nanomedicine and Department of Pharmaceutical Sciences, College of Pharmacy, University of Nebraska Medical Center, Omaha, NE 68198-5830, U.S.A
| | - Zhijian He
- Center for Drug Delivery and Nanomedicine and Department of Pharmaceutical Sciences, College of Pharmacy, University of Nebraska Medical Center, Omaha, NE 68198-5830, U.S.A
| | - Alexander V. Kabanov
- Center for Drug Delivery and Nanomedicine and Department of Pharmaceutical Sciences, College of Pharmacy, University of Nebraska Medical Center, Omaha, NE 68198-5830, U.S.A
| | - Rainer Jordan
- Professur für Makromolekulare Chemie, Department Chemie, Technische Universität Dresden, Zellescher Weg 19, 01069 Dresden, Germany
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183
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Sedlacek O, Monnery BD, Filippov SK, Hoogenboom R, Hruby M. Poly(2-Oxazoline)s - Are They More Advantageous for Biomedical Applications Than Other Polymers? Macromol Rapid Commun 2012; 33:1648-62. [DOI: 10.1002/marc.201200453] [Citation(s) in RCA: 233] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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184
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Barz M, Armiñán A, Canal F, Wolf F, Koynov K, Frey H, Zentel R, Vicent MJ. P(HPMA)-block-P(LA) copolymers in paclitaxel formulations: Polylactide stereochemistry controls micellization, cellular uptake kinetics, intracellular localization and drug efficiency. J Control Release 2012; 163:63-74. [DOI: 10.1016/j.jconrel.2012.05.024] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2012] [Revised: 05/03/2012] [Accepted: 05/13/2012] [Indexed: 11/30/2022]
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185
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Konradi R, Acikgoz C, Textor M. Polyoxazolines for Nonfouling Surface Coatings - A Direct Comparison to the Gold Standard PEG. Macromol Rapid Commun 2012; 33:1663-76. [DOI: 10.1002/marc.201200422] [Citation(s) in RCA: 196] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2012] [Revised: 08/14/2012] [Indexed: 11/11/2022]
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186
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Claeys B, Vervaeck A, Vervaet C, Remon JP, Hoogenboom R, De Geest BG. Poly(2-ethyl-2-oxazoline) as Matrix Excipient for Drug Formulation by Hot Melt Extrusion and Injection Molding. Macromol Rapid Commun 2012; 33:1701-7. [DOI: 10.1002/marc.201200332] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2012] [Revised: 07/06/2012] [Indexed: 11/11/2022]
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187
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Zhang N, Luxenhofer R, Jordan R. Thermoresponsive Poly(2-Oxazoline) Molecular Brushes by Living Ionic Polymerization: Modulation of the Cloud Point by Random and Block Copolymer Pendant Chains. MACROMOL CHEM PHYS 2012. [DOI: 10.1002/macp.201200261] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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188
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Poly(2-oxazoline) Hydrogel Monoliths via Thiol-ene Coupling. Macromol Rapid Commun 2012; 33:1695-700. [DOI: 10.1002/marc.201200249] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2012] [Indexed: 12/29/2022]
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189
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Tauhardt L, Kempe K, Schubert US. Toward the design of LPEI containing block copolymers: Improved synthesis protocol, selective hydrolysis, and detailed characterization. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/pola.26261] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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190
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Kelly AM, Wiesbrock F. Strategies for the Synthesis of Poly(2-Oxazoline)-Based Hydrogels. Macromol Rapid Commun 2012; 33:1632-47. [DOI: 10.1002/marc.201200333] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2012] [Revised: 06/24/2012] [Indexed: 11/09/2022]
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191
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Van Kuringen HPC, Lenoir J, Adriaens E, Bender J, De Geest BG, Hoogenboom R. Partial Hydrolysis of Poly(2-ethyl-2-oxazoline) and Potential Implications for Biomedical Applications? Macromol Biosci 2012; 12:1114-23. [DOI: 10.1002/mabi.201200080] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2012] [Revised: 04/11/2012] [Indexed: 12/26/2022]
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192
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Guillerm B, Monge S, Lapinte V, Robin JJ. How to Modulate the Chemical Structure of Polyoxazolines by Appropriate Functionalization. Macromol Rapid Commun 2012; 33:1600-12. [DOI: 10.1002/marc.201200266] [Citation(s) in RCA: 164] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2012] [Revised: 05/12/2012] [Indexed: 02/04/2023]
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193
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Han Y, He Z, Schulz A, Bronich TK, Jordan R, Luxenhofer R, Kabanov AV. Synergistic combinations of multiple chemotherapeutic agents in high capacity poly(2-oxazoline) micelles. Mol Pharm 2012; 9:2302-13. [PMID: 22681126 DOI: 10.1021/mp300159u] [Citation(s) in RCA: 103] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Many effective drugs for cancer treatment are poorly water-soluble. In combination chemotherapy, needed excipients in additive formulations are often toxic and restrict their applications in clinical intervention. Here, we report on amphiphilic poly(2-oxazoline)s (POx) micelles as a promising high capacity delivery platform for multidrug cancer chemotherapy. A variety of binary and ternary drugs combinations of paclitaxel (PTX), docetaxel (DTX), 17-allylamino-17-demethoxygeldanamycin (17-AAG), etoposide (ETO) and bortezomib (BTZ) were solubilized in defined polymeric micelles achieving unprecedented high total loading capacities of up to 50 wt % drug per final formulation. Multidrug loaded POx micelles showed enhanced stability in comparison to single-drug loaded micelles. Drug ratio dependent synergistic cytotoxicity of micellar ETO/17-AAG was observed in MCF-7 cancer cells and of micellar BTZ/17-AAG in MCF-7, PC3, MDA-MB-231 and HepG2 cells.
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Affiliation(s)
- Yingchao Han
- Center for Drug Delivery and Nanomedicine and Department of Pharmaceutical Sciences, College of Pharmacy, University of Nebraska Medical Center, Omaha, Nebraska 68198-5830, United States
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194
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Cheng Y, Hao J, Lee LA, Biewer MC, Wang Q, Stefan MC. Thermally controlled release of anticancer drug from self-assembled γ-substituted amphiphilic poly(ε-caprolactone) micellar nanoparticles. Biomacromolecules 2012; 13:2163-73. [PMID: 22681332 DOI: 10.1021/bm300823y] [Citation(s) in RCA: 104] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A thermo-responsive poly{γ-2-[2-(2-methoxyethoxy)ethoxy]ethoxy-ε-caprolactone}-b-poly(γ-octyloxy-ε-caprolactone) (PMEEECL-b-POCTCL) diblock copolymer was synthesized by ring-opening polymerization using tin octanoate (Sn(Oct)(2)) catalyst and a fluorescent dansyl initiator. The PMEEECL-b-POCTCL had a lower critical solution temperature (LCST) of 38 °C, and it was employed to prepare thermally responsive micelles. Nile Red and Doxorubicin (DOX) were loaded into the micelles, and the micellar stability and drug carrying ability were investigated. The size and the morphology of the cargo-loaded micelles were determined by DLS, AFM, and TEM. The Nile-Red-loaded polymeric micelles were found to be stable in the presence of both fetal bovine serum and bovine serum albumin over a 72 h period and displayed thermo-responsive in vitro drug release. The blank micelles showed a low cytotoxicity. As comparison, the micelles loaded with DOX showed a much higher in vitro cytotoxicity against MCF-7 human breast cancer cell line when the incubation temperature was elevated above the LCST. Confocal laser scanning microscopy was used to study the cellular uptake and showed that the DOX-loaded micelles were internalized into the cells via an endocytosis pathway.
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Affiliation(s)
- Yixing Cheng
- Department of Chemistry and Biochemistry & Nanocenter, University of South Carolina, Columbia, South Carolina 29208, United States
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195
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Zhang N, Pompe T, Amin I, Luxenhofer R, Werner C, Jordan R. Tailored poly(2-oxazoline) polymer brushes to control protein adsorption and cell adhesion. Macromol Biosci 2012; 12:926-36. [PMID: 22610725 DOI: 10.1002/mabi.201200026] [Citation(s) in RCA: 140] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2012] [Revised: 02/29/2012] [Indexed: 11/07/2022]
Abstract
POx bottle-brush brushes (BBBs) are synthesized by SIPGP of 2-isopropenyl-2-oxazoline and consecutive LCROP of 2-oxazolines on 3-aminopropyltrimethoxysilane-modified silicon substrates. The side chain hydrophilicity and polarity are varied. The impact of the chemical composition and architecture of the BBB upon protein (fibronectin) adsorption and endothelial cell adhesion are investigated and prove extremely low protein adsorption and cell adhesion on BBBs with hydrophilic side chains such as poly(2-methyl-2-oxazoline) and poly(2-ethyl-2-oxazoline). The influence of the POx side chain terminal function upon adsorption and adhesion is minor but the side chain length has a significant effect on bioadsorption.
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Affiliation(s)
- Ning Zhang
- Wacker-Lehrstuhl für Makromolekulare Chemie, Chemie-Department, TU München, Garching, Germany
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196
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Trinh LTT, Lambermont-Thijs HML, Schubert US, Hoogenboom R, Kjøniksen AL. Thermoresponsive Poly(2-oxazoline) Block Copolymers Exhibiting Two Cloud Points: Complex Multistep Assembly Behavior. Macromolecules 2012. [DOI: 10.1021/ma300570j] [Citation(s) in RCA: 89] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Loan T. T. Trinh
- Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, 0315 Oslo,
Norway
| | - Hanneke M. L. Lambermont-Thijs
- Laboratory of Macromolecular
Chemistry and Nanoscience, Eindhoven University of Technology, Den Dolech 2, 5612AZ Eindhoven, The Netherlands
| | - Ulrich S. Schubert
- Laboratory of Macromolecular
Chemistry and Nanoscience, Eindhoven University of Technology, Den Dolech 2, 5612AZ Eindhoven, The Netherlands
- Laboratory of Organic and Macromolecular
Chemistry (IOMC) and Jena Center for Soft Matter (JCSM), Friedrich-Schiller-University Jena, Humboldtstr. 10,
07743 Jena, Germany
| | - Richard Hoogenboom
- Supramolecular
Chemistry Group,
Department of Organic Chemistry, Ghent University, Krijgslaan 281 S4, B-9000 Ghent, Belgium
| | - Anna-Lena Kjøniksen
- Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, 0315 Oslo,
Norway
- Department of Pharmacy, School
of Pharmacy, University of Oslo, P.O. Box
1068, Blindern, 0316 Oslo, Norway
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197
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Weber C, Hoogenboom R, Schubert US. Temperature responsive bio-compatible polymers based on poly(ethylene oxide) and poly(2-oxazoline)s. Prog Polym Sci 2012. [DOI: 10.1016/j.progpolymsci.2011.10.002] [Citation(s) in RCA: 430] [Impact Index Per Article: 35.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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198
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Guillerm B, Darcos V, Lapinte V, Monge S, Coudane J, Robin JJ. Synthesis and evaluation of triazole-linked poly(ε-caprolactone)-graft-poly(2-methyl-2-oxazoline) copolymers as potential drug carriers. Chem Commun (Camb) 2012; 48:2879-81. [DOI: 10.1039/c2cc30191a] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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199
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Shutava TG, Pattekari PP, Arapov KA, Torchilin VP, Lvov YM. Architectural layer-by-layer assembly of drug nanocapsules with PEGylated polyelectrolytes. SOFT MATTER 2012; 8:9418-9427. [PMID: 23144650 PMCID: PMC3490450 DOI: 10.1039/c2sm25683e] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
150-200 nm diameter capsules containing 60-70 wt % of poorly soluble drugs, paclitaxel and camptothecin, were produced by layer-by-layer (LbL) assembly on drug nanocores in a solution containing uncharged stabilizers. Optimization of capsule shell architecture and thickness allowed for concentrated (3-5 mg/mL) colloids that are stable in isotonic salt buffers. Nanoparticle aggregation during the washless LbL-assembly was prevented by using low molecular weight block-copolymers of poly(amino acids) (poly-L-lysine and poly-L-glutamic acid) with polyethylene glycol (PEG) in combination with heparin and bovine serum albumin at every bilayer building step. Minimal amounts of the polyelectrolytes were used to recharge the surface of nanoparticles in this non-washing LbL process. Such PEGylated shells resulted in drug nanocapsules with high colloidal stability in PBS buffer and increased protein adhesion resistance. The washless LbL polyelectrolyte nanocapsule assembly process, colloidal stability and nanoparticle morphology were monitored by dynamic light scattering and electrophoretic mobility measurements, UV-vis spectroscopy, TEM, SEM and laser confocal microscopy imaging.
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Affiliation(s)
- Tatsiana G Shutava
- Louisiana Tech University, Institute for Micromanufacturing, 911 Hergot Ave., Ruston, Louisiana, 71272, USA
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200
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Milonaki Y, Kaditi E, Pispas S, Demetzos C. Amphiphilic gradient copolymers of 2-methyl- and 2-phenyl-2-oxazoline: self-organization in aqueous media and drug encapsulation. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/pola.25888] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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