1
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Pouyan P, Cherri M, Haag R. Polyglycerols as Multi-Functional Platforms: Synthesis and Biomedical Applications. Polymers (Basel) 2022; 14:polym14132684. [PMID: 35808728 PMCID: PMC9269438 DOI: 10.3390/polym14132684] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 06/24/2022] [Accepted: 06/26/2022] [Indexed: 02/07/2023] Open
Abstract
The remarkable and unique characteristics of polyglycerols (PG) have made them an attractive candidate for many applications in the biomedical and pharmaceutical fields. The presence of multiple hydroxy groups on the flexible polyether backbone not only enables the further modification of the PG structure but also makes the polymer highly water-soluble and results in excellent biocompatibility. In this review, the polymerization routes leading to PG with different architectures are discussed. Moreover, we discuss the role of these polymers in different biomedical applications such as drug delivery systems, protein conjugation, and surface modification.
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2
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Gleue L, Schupp J, Zimmer N, Becker E, Frey H, Tuettenberg A, Helm M. Stability of Alkyl Chain-Mediated Lipid Anchoring in Liposomal Membranes. Cells 2020; 9:E2213. [PMID: 33003620 PMCID: PMC7599733 DOI: 10.3390/cells9102213] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 09/21/2020] [Accepted: 09/24/2020] [Indexed: 12/31/2022] Open
Abstract
Lipid exchange among biological membranes, lipoprotein particles, micelles, and liposomes is an important yet underrated phenomenon with repercussions throughout the life sciences. The premature loss of lipid molecules from liposomal formulations severely impacts therapeutic applications of the latter and thus limits the type of lipids and lipid conjugates available for fine-tuning liposomal properties. While cholesterol derivatives, with their irregular lipophilic surface shape, are known to readily undergo lipid exchange and interconvert, e.g., with serum, the situation is unclear for lipids with regular, linear-shaped alkyl chains. This study compares the propensity of fluorescence-labeled lipid conjugates of systematically varied lengths to migrate from liposomal particles consisting mainly of egg phosphatidyl choline 3 (EPC3) and cholesterol into biomembranes. We show that dialkyl glyceryl lipids with chains of 18-20 methylene units are inherently stable in liposomal membranes. In contrast, C16 lipids show some lipid exchange, albeit significantly less than comparable cholesterol conjugates. Remarkably, the C18 chain length, which confers noticeable anchor stability, corresponds to the typical chain length in biological membranes.
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Affiliation(s)
- Lukas Gleue
- Institute of Pharmaceutical and Biomedical Science, Johannes Gutenberg-University Mainz, 55128 Mainz, Germany;
| | - Jonathan Schupp
- Department of Dermatology, University Medical Center, Johannes Gutenberg-University Mainz, 55131 Mainz, Germany; (J.S.); (N.Z.)
| | - Niklas Zimmer
- Department of Dermatology, University Medical Center, Johannes Gutenberg-University Mainz, 55131 Mainz, Germany; (J.S.); (N.Z.)
| | - Eyleen Becker
- Department of Chemistry, Johannes Gutenberg-University Mainz, 55128 Mainz, Germany; (E.B.); (H.F.)
| | - Holger Frey
- Department of Chemistry, Johannes Gutenberg-University Mainz, 55128 Mainz, Germany; (E.B.); (H.F.)
| | - Andrea Tuettenberg
- Department of Dermatology, University Medical Center, Johannes Gutenberg-University Mainz, 55131 Mainz, Germany; (J.S.); (N.Z.)
| | - Mark Helm
- Institute of Pharmaceutical and Biomedical Science, Johannes Gutenberg-University Mainz, 55128 Mainz, Germany;
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3
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Anionic ring-opening copolymerization of styrene oxide with monosubstituted oxiranes: analysis of composition of prepared new copolyether-diols by MALDI-TOF mass spectrometry. Polym Bull (Berl) 2019. [DOI: 10.1007/s00289-019-02717-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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4
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Weber C, Voigt M, Simon J, Danner AK, Frey H, Mailänder V, Helm M, Morsbach S, Landfester K. Functionalization of Liposomes with Hydrophilic Polymers Results in Macrophage Uptake Independent of the Protein Corona. Biomacromolecules 2019; 20:2989-2999. [PMID: 31268685 PMCID: PMC6750830 DOI: 10.1021/acs.biomac.9b00539] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Revised: 07/01/2019] [Indexed: 12/11/2022]
Abstract
Liposomes are established drug carriers that are employed to transport and deliver hydrophilic drugs in the body. To minimize unspecific cellular uptake, nanocarriers are commonly modified with poly(ethylene glycol) (PEG), which is known to minimize unspecific protein adsorption. However, to date, it has not been studied whether this is an intrinsic and specific property of PEG or if it can be transferred to hyperbranched polyglycerol (hbPG) as well. Additionally, it remains unclear if the reduction of unspecific cell uptake is independent of the "basic" carrier at which a surface functionalization with polymers is usually applied. Therefore, we studied the protein corona of differently functionalized liposomes (unfunctionalized vs PEG or hbPG-functionalized) using PEGylated and PGylated lipids. Their cellular uptake in macrophages was compared. For all three liposomal samples, rather similar protein corona compositions were found, and also-more importantly-the total amount of proteins adsorbed was very low compared to other nanoparticles. Interestingly, the cellular uptake was then significantly changed by the surface functionalization itself, despite the adsorption of a small amount of proteins: although the PEGylation of liposomes resulted in the abovementioned decreased cell uptake, functionalization with hbPG lead to enhanced macrophage interaction-both in the media with and without proteins. In comparison to other nanocarrier systems, this seems to be a liposome-specific effect related to the low amount of adsorbed proteins.
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Affiliation(s)
- Claudia Weber
- Max
Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Matthias Voigt
- Institute
of Pharmacy and Biochemistry, Johannes Gutenberg-University, Staudingerweg 5, 55128 Mainz, Germany
| | - Johanna Simon
- Max
Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
- Department
of Dermatology, University Medical Center
of the Johannes Gutenberg-University Mainz, Langenbeckstrasse 1, 55131 Mainz, Germany
| | - Ann-Kathrin Danner
- Institute
of Organic Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Holger Frey
- Institute
of Organic Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Volker Mailänder
- Max
Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
- Department
of Dermatology, University Medical Center
of the Johannes Gutenberg-University Mainz, Langenbeckstrasse 1, 55131 Mainz, Germany
| | - Mark Helm
- Institute
of Pharmacy and Biochemistry, Johannes Gutenberg-University, Staudingerweg 5, 55128 Mainz, Germany
| | - Svenja Morsbach
- Max
Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Katharina Landfester
- Max
Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
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5
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Sánchez-Fernández EM, García-Moreno MI, Arroba AI, Aguilar-Diosdado M, Padrón JM, García-Hernández R, Gamarro F, Fustero S, Sánchez-Aparicio JE, Masgrau L, García Fernández JM, Ortiz Mellet C. Synthesis of polyfluoroalkyl sp 2-iminosugar glycolipids and evaluation of their immunomodulatory properties towards anti-tumor, anti-leishmanial and anti-inflammatory therapies. Eur J Med Chem 2019; 182:111604. [PMID: 31425910 DOI: 10.1016/j.ejmech.2019.111604] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 07/27/2019] [Accepted: 08/07/2019] [Indexed: 12/27/2022]
Abstract
Immunomodulatory glycolipids, among which α-galactosylceramide (KRN7000) is an iconic example, have shown strong therapeutic potential in a variety of conditions ranging from cancer and infection to autoimmune or neurodegenerative diseases. A main difficulty for those channels is that they often provoke a cytokine storm comprising both pro- and anti-inflammatory mediators that antagonize each other and negatively affect the immune response. The synthesis of analogues with narrower cytokine secretion-inducing capabilities is hampered by the intrinsic difficulty at controlling the stereochemical outcome in glycosidation reactions, particularly if targeting the α-anomer, which seriously hampers drug optimization strategies. Here we show that replacing the monosaccharide glycone by a sp2-iminosugar glycomimetic moiety allows accessing N-linked sp2-iminosugar glycolipids (sp2-IGLs) with total α-stereocontrol in a single step with no need of protecting groups or glycosidation promotors. The lipid tail has been then readily tailored by incorporating polyfluoroalkyl segments of varied lengths in view of favouring binding to the lipid binding site of the master p38 mitogen activated protein kinase (p38 MAPK), thereby polarizing the immune response in a cell-context dependent manner. The compounds have been evaluated for their antiproliferative, anti-leishmanial and anti-inflammatory activities in different cell assays. The size of the fluorous segment was found to be critical for the biological activity, probably by regulating the aggregation and membrane-crossing properties, whereas the hydroxylation profile (gluco or galacto-like) was less relevant. Biochemical and computational data further support a mechanism of action implying binding to the allosteric lipid binding site of p38 MAPK and subsequent activation of the noncanonical autophosphorylation route. The ensemble of results provide a proof of concept of the potential of sp2-IGLs as immunoregulators.
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Affiliation(s)
- Elena M Sánchez-Fernández
- Department of Organic Chemistry, Faculty of Chemistry, University of Seville, C/ Profesor García González 1, 41012, Seville, Spain.
| | - Ma Isabel García-Moreno
- Department of Organic Chemistry, Faculty of Chemistry, University of Seville, C/ Profesor García González 1, 41012, Seville, Spain
| | - Ana I Arroba
- Biomedical Research and Innovation Institute of Cádiz (INiBICA) Research Unit, Puerta del Mar University Hospital, Av/ Ana de Viya 21, 11009, Cádiz, Spain; Research Unit, Jerez University Hospital, Carretera Circunvalación s/n, 11407, Jerez de la Frontera, Spain.
| | - Manuel Aguilar-Diosdado
- Biomedical Research and Innovation Institute of Cádiz (INiBICA) Research Unit, Puerta del Mar University Hospital, Av/ Ana de Viya 21, 11009, Cádiz, Spain; Research Unit, Jerez University Hospital, Carretera Circunvalación s/n, 11407, Jerez de la Frontera, Spain
| | - José M Padrón
- BioLab, Instituto Universitario de Bio-Orgánica "Antonio González" (IUBO AG), Centro de Investigaciones Biomédicas de Canarias (CIBICAN), Universidad de la Laguna, PO BOX 456, 38200, La Laguna, Spain
| | - Raquel García-Hernández
- Instituto de Parasitología y Biomedicina "López Neyra", IPBLN-CSIC, Parque Tecnológico de Ciencias de la Salud, 18016, Granada, Spain
| | - Francisco Gamarro
- Instituto de Parasitología y Biomedicina "López Neyra", IPBLN-CSIC, Parque Tecnológico de Ciencias de la Salud, 18016, Granada, Spain
| | - Santos Fustero
- Department of Organic Chemistry, Universidad de Valencia, 46100, Burjassot, Spain
| | | | - Laura Masgrau
- Department of Chemistry, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain
| | - José Manuel García Fernández
- Instituto de Investigaciones Químicas (IIQ), CSIC - Universidad de Sevilla, C/ Américo Vespucio 49, Isla de la Cartuja, 41092, Sevilla, Spain
| | - Carmen Ortiz Mellet
- Department of Organic Chemistry, Faculty of Chemistry, University of Seville, C/ Profesor García González 1, 41012, Seville, Spain.
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6
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Danner A, Schöttler S, Alexandrino E, Hammer S, Landfester K, Mailänder V, Morsbach S, Frey H, Wurm FR. Phosphonylation Controls the Protein Corona of Multifunctional Polyglycerol‐Modified Nanocarriers. Macromol Biosci 2019; 19:e1800468. [DOI: 10.1002/mabi.201800468] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 03/04/2019] [Indexed: 12/31/2022]
Affiliation(s)
- Ann‐Kathrin Danner
- Institut für Organische ChemieJohannes Gutenberg‐Universität Mainz Duesbergweg 10–14 55128 Mainz Germany
- Graduate School Materials Science in Mainz Staudingerweg 9 55128 Mainz Germany
| | - Susanne Schöttler
- Max‐Planck‐Institut für Polymerforschung Ackermannweg 10 55128 Mainz Germany
| | - Evandro Alexandrino
- Max‐Planck‐Institut für Polymerforschung Ackermannweg 10 55128 Mainz Germany
| | - Sophie Hammer
- Institut für Organische ChemieJohannes Gutenberg‐Universität Mainz Duesbergweg 10–14 55128 Mainz Germany
- Graduate School Materials Science in Mainz Staudingerweg 9 55128 Mainz Germany
| | | | - Volker Mailänder
- Max‐Planck‐Institut für Polymerforschung Ackermannweg 10 55128 Mainz Germany
- Dermatology ClinicUniversity Medical Center of the Johannes Gutenberg‐University Mainz Langenbeckstr. 1 55131 Mainz Germany
| | - Svenja Morsbach
- Max‐Planck‐Institut für Polymerforschung Ackermannweg 10 55128 Mainz Germany
| | - Holger Frey
- Institut für Organische ChemieJohannes Gutenberg‐Universität Mainz Duesbergweg 10–14 55128 Mainz Germany
| | - Frederik R. Wurm
- Max‐Planck‐Institut für Polymerforschung Ackermannweg 10 55128 Mainz Germany
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7
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Voigt M, Fritz T, Worm M, Frey H, Helm M. Surface Modification of Nanoparticles and Nanovesicles via Click-Chemistry. Methods Mol Biol 2019; 2000:235-245. [PMID: 31148019 DOI: 10.1007/978-1-4939-9516-5_16] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Surface modification of nanocarriers offers the possibility of targeted drug delivery, which is of major interest in modern pharmaceutical science. Click-chemistry affords an easy and fast way to modify the surface with targeting structures under mild reaction conditions. Here we describe our current method for the post-preparational surface modification of multifunctional sterically stabilized (stealth) liposomes via copper-catalyzed azide-alkyne cycloaddition (CuAAC) and inverse electron demand Diels-Alder norbornene-tetrazine cycloaddition (IEDDA). We emphasize the use of these in a one-pot orthogonal reaction for deep investigation on stability and targeting of nanocarriers. As the production of clickable amphiphilic polymers is a limiting factor in most cases, we also describe our nanocarrier preparation technique called dual centrifugation, which enables the formulation of liposomes on a single-digit milligram scale of total lipid mass.
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Affiliation(s)
- Matthias Voigt
- Institute of Pharmacy and Biochemistry, Johannes Gutenberg-University, Staudingerweg 5, Mainz, 55126, Germany
| | - Thomas Fritz
- Institute of Pharmacy and Biochemistry, Johannes Gutenberg-University, Staudingerweg 5, Mainz, 55126, Germany
| | - Matthias Worm
- Institute of Organic Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, Mainz, 55128, Germany
| | - Holger Frey
- Institute of Organic Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, Mainz, 55128, Germany
| | - Mark Helm
- Institute of Pharmacy and Biochemistry, Johannes Gutenberg-University, Staudingerweg 5, Mainz, 55126, Germany.
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8
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Wagener K, Worm M, Pektor S, Schinnerer M, Thiermann R, Miederer M, Frey H, Rösch F. Comparison of Linear and Hyperbranched Polyether Lipids for Liposome Shielding by 18F-Radiolabeling and Positron Emission Tomography. Biomacromolecules 2018; 19:2506-2516. [DOI: 10.1021/acs.biomac.8b00115] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Karolin Wagener
- Institute of Nuclear Chemistry, Johannes Gutenberg University, Fritz-Strassmann-Weg 2, D-55128 Mainz, Germany
| | - Matthias Worm
- Institute of Organic Chemistry, Johannes Gutenberg University, Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Stefanie Pektor
- Clinic for Nuclear Medicine, University Medical Center, Langenbeckstr. 1, D-55131 Mainz, Germany
| | - Meike Schinnerer
- Institute of Physical Chemistry, Johannes Gutenberg University, Welder Weg 11, 55099 Mainz, Germany
| | | | - Matthias Miederer
- Clinic for Nuclear Medicine, University Medical Center, Langenbeckstr. 1, D-55131 Mainz, Germany
| | - Holger Frey
- Institute of Organic Chemistry, Johannes Gutenberg University, Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Frank Rösch
- Institute of Nuclear Chemistry, Johannes Gutenberg University, Fritz-Strassmann-Weg 2, D-55128 Mainz, Germany
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9
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Hu S, Zhao J, Zhang G. Noncopolymerization Approach to Copolymers via Concurrent Transesterification and Ring-Opening Reactions. ACS Macro Lett 2016; 5:40-44. [PMID: 35668601 DOI: 10.1021/acsmacrolett.5b00839] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Inter- and intrachain transesterification, normally regarded as a detrimental side reaction for the synthesis of polyesters, is utilized herein to formulate a novel strategy for the modification of polyesters. Addition of an organic superbase into the mixture of hydroxyl-terminated poly(ε-caprolactone) and an epoxide, for example, propylene oxide or 1,2-butylene oxide, triggers concurrent nucleophilic ring-opening of the epoxide and transesterification reaction. The synergetic effect enables convenient and efficient transformation of the polyester into poly(ester-ether) random copolymers and thus advances the preparation of functional degradable polymeric materials taking advantage of the variety of commercial and laboratory-made polyesters and epoxides.
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Affiliation(s)
- Shuangyan Hu
- Faculty of Materials Science
and Engineering, South China University of Technology, Guangzhou 510640, People’s Republic of China
| | - Junpeng Zhao
- Faculty of Materials Science
and Engineering, South China University of Technology, Guangzhou 510640, People’s Republic of China
| | - Guangzhao Zhang
- Faculty of Materials Science
and Engineering, South China University of Technology, Guangzhou 510640, People’s Republic of China
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10
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Müller SS, Fritz T, Gimnich M, Worm M, Helm M, Frey H. Biodegradable hyperbranched polyether-lipids with in-chain pH-sensitive linkages. Polym Chem 2016. [DOI: 10.1039/c6py01308b] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hyperbranched polyether-based lipids with cleavable acetal units were obtained via copolymerization of the epoxide inimer 1-(glycidyloxy)ethyl ethylene glycol ether (GEGE) and glycidol, using anionic ring-opening polymerization.
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Affiliation(s)
- S. S. Müller
- Institute of Organic Chemistry
- Johannes Gutenberg University Mainz
- 55128 Mainz
- Germany
- Graduate School Materials Science in Mainz (MAINZ)
| | - T. Fritz
- Institute of Pharmacy and Biochemistry
- Johannes Gutenberg University Mainz
- 55128 Mainz
- Germany
| | - M. Gimnich
- Institute of Organic Chemistry
- Johannes Gutenberg University Mainz
- 55128 Mainz
- Germany
| | - M. Worm
- Institute of Organic Chemistry
- Johannes Gutenberg University Mainz
- 55128 Mainz
- Germany
| | - M. Helm
- Institute of Pharmacy and Biochemistry
- Johannes Gutenberg University Mainz
- 55128 Mainz
- Germany
| | - H. Frey
- Institute of Organic Chemistry
- Johannes Gutenberg University Mainz
- 55128 Mainz
- Germany
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11
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Cao Y, Liu M, Zhang K, Dong J, Zu G, Chen Y, Zhang T, Xiong D, Pei R. Preparation of linear poly(glycerol) as a T1 contrast agent for tumor-targeted magnetic resonance imaging. J Mater Chem B 2016; 4:6716-6725. [DOI: 10.1039/c6tb01514j] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Macromolecular contrast agents (CAs) labeled with targeting molecules are gaining remarkable interest as promising materials overcoming the defects of small-molecule CAs.
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Affiliation(s)
- Yi Cao
- Key Laboratory of Nano-Bio Interface
- Division of Nanobiomedicine
- Suzhou Institute of Nano-Tech and Nano-Bionics
- Chinese Academy of Sciences
- Suzhou 215123
| | - Min Liu
- Key Laboratory of Nano-Bio Interface
- Division of Nanobiomedicine
- Suzhou Institute of Nano-Tech and Nano-Bionics
- Chinese Academy of Sciences
- Suzhou 215123
| | - Kunchi Zhang
- Key Laboratory of Nano-Bio Interface
- Division of Nanobiomedicine
- Suzhou Institute of Nano-Tech and Nano-Bionics
- Chinese Academy of Sciences
- Suzhou 215123
| | - Jingjin Dong
- Key Laboratory of Nano-Bio Interface
- Division of Nanobiomedicine
- Suzhou Institute of Nano-Tech and Nano-Bionics
- Chinese Academy of Sciences
- Suzhou 215123
| | - Guangyue Zu
- Key Laboratory of Nano-Bio Interface
- Division of Nanobiomedicine
- Suzhou Institute of Nano-Tech and Nano-Bionics
- Chinese Academy of Sciences
- Suzhou 215123
| | - Yang Chen
- Key Laboratory of Nano-Bio Interface
- Division of Nanobiomedicine
- Suzhou Institute of Nano-Tech and Nano-Bionics
- Chinese Academy of Sciences
- Suzhou 215123
| | - Tingting Zhang
- Key Laboratory of Nano-Bio Interface
- Division of Nanobiomedicine
- Suzhou Institute of Nano-Tech and Nano-Bionics
- Chinese Academy of Sciences
- Suzhou 215123
| | - Dangsheng Xiong
- School of Materials Science and Engineering
- Nanjing University of Science and Technology
- Nanjing 210094
- China
| | - Renjun Pei
- Key Laboratory of Nano-Bio Interface
- Division of Nanobiomedicine
- Suzhou Institute of Nano-Tech and Nano-Bionics
- Chinese Academy of Sciences
- Suzhou 215123
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12
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Herzberger J, Niederer K, Pohlit H, Seiwert J, Worm M, Wurm FR, Frey H. Polymerization of Ethylene Oxide, Propylene Oxide, and Other Alkylene Oxides: Synthesis, Novel Polymer Architectures, and Bioconjugation. Chem Rev 2015; 116:2170-243. [PMID: 26713458 DOI: 10.1021/acs.chemrev.5b00441] [Citation(s) in RCA: 442] [Impact Index Per Article: 49.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The review summarizes current trends and developments in the polymerization of alkylene oxides in the last two decades since 1995, with a particular focus on the most important epoxide monomers ethylene oxide (EO), propylene oxide (PO), and butylene oxide (BO). Classical synthetic pathways, i.e., anionic polymerization, coordination polymerization, and cationic polymerization of epoxides (oxiranes), are briefly reviewed. The main focus of the review lies on more recent and in some cases metal-free methods for epoxide polymerization, i.e., the activated monomer strategy, the use of organocatalysts, such as N-heterocyclic carbenes (NHCs) and N-heterocyclic olefins (NHOs) as well as phosphazene bases. In addition, the commercially relevant double-metal cyanide (DMC) catalyst systems are discussed. Besides the synthetic progress, new types of multifunctional linear PEG (mf-PEG) and PPO structures accessible by copolymerization of EO or PO with functional epoxide comonomers are presented as well as complex branched, hyperbranched, and dendrimer like polyethers. Amphiphilic block copolymers based on PEO and PPO (Poloxamers and Pluronics) and advances in the area of PEGylation as the most important bioconjugation strategy are also summarized. With the ever growing toolbox for epoxide polymerization, a "polyether universe" may be envisaged that in its structural diversity parallels the immense variety of structural options available for polymers based on vinyl monomers with a purely carbon-based backbone.
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Affiliation(s)
- Jana Herzberger
- Institute of Organic Chemistry, Johannes Gutenberg-University Mainz , Duesbergweg 10-14, D-55128 Mainz, Germany.,Graduate School Materials Science in Mainz , Staudingerweg 9, D-55128 Mainz, Germany
| | - Kerstin Niederer
- Institute of Organic Chemistry, Johannes Gutenberg-University Mainz , Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Hannah Pohlit
- Institute of Organic Chemistry, Johannes Gutenberg-University Mainz , Duesbergweg 10-14, D-55128 Mainz, Germany.,Graduate School Materials Science in Mainz , Staudingerweg 9, D-55128 Mainz, Germany.,Max Planck Graduate Center , Staudingerweg 6, D-55128 Mainz, Germany.,Department of Dermatology, University Medical Center , Langenbeckstraße 1, D-55131 Mainz, Germany
| | - Jan Seiwert
- Institute of Organic Chemistry, Johannes Gutenberg-University Mainz , Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Matthias Worm
- Institute of Organic Chemistry, Johannes Gutenberg-University Mainz , Duesbergweg 10-14, D-55128 Mainz, Germany.,Max Planck Graduate Center , Staudingerweg 6, D-55128 Mainz, Germany
| | - Frederik R Wurm
- Max Planck Graduate Center , Staudingerweg 6, D-55128 Mainz, Germany.,Max Planck Institute for Polymer Research , Ackermannweg 10, D-55128 Mainz, Germany
| | - Holger Frey
- Institute of Organic Chemistry, Johannes Gutenberg-University Mainz , Duesbergweg 10-14, D-55128 Mainz, Germany.,Graduate School Materials Science in Mainz , Staudingerweg 9, D-55128 Mainz, Germany
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13
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Christ EM, Hobernik D, Bros M, Wagner M, Frey H. Cationic Copolymerization of 3,3-Bis(hydroxymethyl)oxetane and Glycidol: Biocompatible Hyperbranched Polyether Polyols with High Content of Primary Hydroxyl Groups. Biomacromolecules 2015; 16:3297-307. [DOI: 10.1021/acs.biomac.5b00951] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Eva-Maria Christ
- Institute
of Organic Chemistry, Johannes Gutenberg-University Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany
- Graduate School
Materials Science in Mainz (MAINZ), Staudingerweg 9, D-55128 Mainz, Germany
| | - Dominika Hobernik
- Department
of Dermatology, University Medical Center of the Johannes Gutenberg-University, Langenbeckstrasse 1, D-55131 Mainz, Germany
| | - Matthias Bros
- Department
of Dermatology, University Medical Center of the Johannes Gutenberg-University, Langenbeckstrasse 1, D-55131 Mainz, Germany
| | - Manfred Wagner
- Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany
| | - Holger Frey
- Institute
of Organic Chemistry, Johannes Gutenberg-University Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany
- Graduate School
Materials Science in Mainz (MAINZ), Staudingerweg 9, D-55128 Mainz, Germany
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14
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Velencoso MM, Ramos MJ, Serrano A, de Lucas A, Rodríguez JF. Fire retardant functionalized polyol by phosphonate monomer insertion. POLYM INT 2015. [DOI: 10.1002/pi.4970] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- María M Velencoso
- Institute of Chemical and Environmental Technology (ITQUIMA), Department of Chemical Engineering; University of Castilla-La Mancha; Avda. Camilo José Cela s/n 13004 Ciudad Real Spain
| | - María J Ramos
- Institute of Chemical and Environmental Technology (ITQUIMA), Department of Chemical Engineering; University of Castilla-La Mancha; Avda. Camilo José Cela s/n 13004 Ciudad Real Spain
| | - Angel Serrano
- Institute of Chemical and Environmental Technology (ITQUIMA), Department of Chemical Engineering; University of Castilla-La Mancha; Avda. Camilo José Cela s/n 13004 Ciudad Real Spain
| | - Antonio de Lucas
- Institute of Chemical and Environmental Technology (ITQUIMA), Department of Chemical Engineering; University of Castilla-La Mancha; Avda. Camilo José Cela s/n 13004 Ciudad Real Spain
| | - Juan F Rodríguez
- Institute of Chemical and Environmental Technology (ITQUIMA), Department of Chemical Engineering; University of Castilla-La Mancha; Avda. Camilo José Cela s/n 13004 Ciudad Real Spain
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15
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Scholtysek P, Shah SWH, Müller SS, Schöps R, Frey H, Blume A, Kressler J. Unusual triskelion patterns and dye-labelled GUVs: consequences of the interaction of cholesterol-containing linear-hyperbranched block copolymers with phospholipids. SOFT MATTER 2015; 11:6106-6117. [PMID: 26133098 DOI: 10.1039/c5sm01017a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Cholesterol (Ch) linked to a linear-hyperbranched block copolymer composed of poly(ethylene glycol) (PEG) and poly(glycerol) (hbPG) was investigated for its membrane anchoring properties. Two polyether-based linear-hyperbranched block copolymers with and without a covalently attached rhodamine fluorescence label (Rho) were employed (Ch-PEG30-b-hbPG23 and Ch-PEG30-b-hbPG17-Rho). Compression isotherms of co-spread 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) or 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC) with the respective polymers were measured on the Langmuir trough and the morphology development of the liquid-condensed (LC) domains was studied by epi-fluorescence microscopy. LC domains were strongly deformed due to the localization of the polymers at the domain interface, indicating a line activity for both block copolymers. Simultaneously, it was observed that the presence of the fluorescence label significantly influences the domain morphology, the rhodamine labelled polymer showing higher line activity. Adsorption isotherms of the polymers to the water surface or to monolayers of DPPC and 1,2-dioleoyl-sn-glycero-3-phosphocholine (DOPC), respectively, were collected. Again the rhodamine labelled polymer showed higher surface activity and a higher affinity for insertion into lipid monolayers, which was negligibly affected when the sub-phase was changed to aqueous sodium chloride solution or phosphate buffer. Calorimetric investigations in bulk confirmed the results found using tensiometry. Confocal laser scanning microscopy (CLSM) of giant unilamellar vesicles (GUVs) also confirmed the polymers' fast adsorption to and insertion into phospholipid membranes.
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Affiliation(s)
- Peggy Scholtysek
- Institute of Chemistry, Martin Luther University Halle-Wittenberg, von-Danckelmann-Platz 4, D-06120 Halle (Saale), Germany.
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16
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Zhang J, Wang G. Polymers with complicated architectures constructed from the versatile, functional monomer 1-ethoxyethyl glycidyl ether. Sci China Chem 2015. [DOI: 10.1007/s11426-015-5463-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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17
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Klein R, Wurm FR. Aliphatic Polyethers: Classical Polymers for the 21st Century. Macromol Rapid Commun 2015; 36:1147-65. [PMID: 25967116 DOI: 10.1002/marc.201500013] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2015] [Revised: 03/03/2015] [Indexed: 12/18/2022]
Abstract
Polyethers-polymers with the structural element (R'-O-R)n in their backbone--are an old class of polymers which were already used at the time of the ancient Egyptians. However, still today these materials are highly important with applications in all areas of our life, reaching from the automotive and paper industry to cosmetics and biomedical applications. In this Review, different aliphatic polyethers like poly(epoxide)s, poly(oxetane)s, and poly(tetrahydrofuran) are discussed. Special emphasis is placed on the history, the polymerization techniques (industrially and in academia), the properties, the applications as well as recent developments of these materials.
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Affiliation(s)
- Rebecca Klein
- Institute of Organic Chemistry, Johannes Gutenberg University Mainz, Duesbergweg 10-14, D-55099, Mainz, Germany.,Graduate School "Material Science in Mainz", Staudingerweg 9, D-55099, Mainz, Germany
| | - Frederik R Wurm
- Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128, Mainz, Germany
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18
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Reibel AT, Müller SS, Pektor S, Bausbacher N, Miederer M, Frey H, Rösch F. Fate of Linear and Branched Polyether-Lipids In Vivo in Comparison to Their Liposomal Formulations by 18F-Radiolabeling and Positron Emission Tomography. Biomacromolecules 2015; 16:842-51. [DOI: 10.1021/bm5017332] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
| | | | - Stefanie Pektor
- Clinic for Nuclear Medicine, University Medical Center, Mainz, Germany
| | - Nicole Bausbacher
- Clinic for Nuclear Medicine, University Medical Center, Mainz, Germany
| | - Matthias Miederer
- Clinic for Nuclear Medicine, University Medical Center, Mainz, Germany
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19
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Mohr K, Müller SS, Müller LK, Rusitzka K, Gietzen S, Frey H, Schmidt M. Evaluation of multifunctional liposomes in human blood serum by light scattering. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:14954-14962. [PMID: 25469945 DOI: 10.1021/la502926e] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
To overcome the limited functionality of "stealth" lipids based on linear poly(ethylene glycol) (PEG) chains, hyperbranched polyether-based lipids that bear multiple hydroxyl groups for further chemical modification may be a suitable replacement. This study focuses on the development and characterization of "stealth" liposomes modified with a novel hyperbranched polyglycerol lipid (cholesterol-PEG30-hbPG23). An emphasis was placed on the stability of these liposomes in comparison to those containing a linear PEG derivative (cholesterol-PEG44) directly in human blood serum, characterized via dynamic light scattering (DLS). Polymer lipid contents were varied between 0 and 30 mol %, resulting in liposomes with sizes between 150 and 80 nm in radius, depending on the composition. DLS analysis showed no aggregation inducing interactions between serum components and liposomes containing 10-30 mol % of the hyperbranched lipid. In contrast, liposomes functionalized with comparable amounts of linear PEG exhibited aggregate formation in the size range of 170-330 nm under similar conditions. In addition to DLS, cryo-transmission electron microscopy (TEM) was employed for all liposome samples to prove the formation of unilamellar vesicles. These results demonstrate the outstanding potential of the introduction of hyperbranched polyglycerol into liposomes to stabilize the assemblies against aggregation while providing additional functionalization sites.
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Affiliation(s)
- Kristin Mohr
- Institute of Physical Chemistry, Johannes Gutenberg University Mainz , Welderweg 11, 55128 Mainz, Germany
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20
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Zhang H, Grinstaff MW. Recent advances in glycerol polymers: chemistry and biomedical applications. Macromol Rapid Commun 2014; 35:1906-24. [PMID: 25308354 PMCID: PMC4415886 DOI: 10.1002/marc.201400389] [Citation(s) in RCA: 95] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2014] [Revised: 08/08/2014] [Indexed: 12/19/2022]
Abstract
Glycerol polymers are attracting increased attention due to the diversity of polymer compositions and architectures available. This article provides a brief chronological review on the current status of these polymers along with representative examples of their use for biomedical applications. First, the underlying chemistry of glycerol that provides access to a range of monomers for subsequent polymerizations is described. Then, the various synthetic methodologies to prepare glycerol-based polymers including polyethers, polycarbonates, polyesters, and so forth are reviewed. Next, several biomedical applications where glycerol polymers are being investigated including carriers for drug delivery, sealants or coatings for tissue repair, and agents possessing antibacterial activity are described. Fourth, the growing market opportunity for the use of polymers in medicine is described. Finally, the findings are concluded and summarized, as well as the potential opportunities for continued research efforts are discussed.
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Affiliation(s)
- Heng Zhang
- Departments of Biomedical Engineering and Chemistry, Boston University, Boston, Massachusetts 02215, United States
| | - Mark W. Grinstaff
- Departments of Biomedical Engineering and Chemistry, Boston University, Boston, Massachusetts 02215, United States
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21
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Rodriguez Lavado J, Sestito SE, Cighetti R, Aguilar Moncayo EM, Oblak A, Lainšček D, Jiménez Blanco JL, García Fernández JM, Ortiz Mellet C, Jerala R, Calabrese V, Peri F. Trehalose- and glucose-derived glycoamphiphiles: small-molecule and nanoparticle Toll-like receptor 4 (TLR4) modulators. J Med Chem 2014; 57:9105-23. [PMID: 25268544 DOI: 10.1021/jm501182w] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
An increasing number of pathologies have been linked to Toll-like receptor 4 (TLR4) activation and signaling, therefore new hit and lead compounds targeting this receptor activation process are urgently needed. We report on the synthesis and biological properties of glycolipids based on glucose and trehalose scaffolds which potently inhibit TLR4 activation and signaling in vitro and in vivo. Structure-activity relationship studies on these compounds indicate that the presence of fatty ester chains in the molecule is a primary prerequisite for biological activity and point to facial amphiphilicity as a preferred architecture for TLR4 antagonism. The cationic glycolipids here presented can be considered as new lead compounds for the development of drugs targeting TLR4 activation and signaling in infectious, inflammatory, and autoimmune diseases. Interestingly, the biological activity of the best drug candidate was retained after adsorption at the surface of colloidal gold nanoparticles, broadening the options for clinical development.
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Affiliation(s)
- Julio Rodriguez Lavado
- Department of Organic Chemistry, Faculty of Chemistry, University of Sevilla , E-41012 Sevilla, Spain
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22
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Fritz T, Hirsch M, Richter FC, Müller SS, Hofmann AM, Rusitzka KAK, Markl J, Massing U, Frey H, Helm M. Click Modification of Multifunctional Liposomes Bearing Hyperbranched Polyether Chains. Biomacromolecules 2014; 15:2440-8. [DOI: 10.1021/bm5003027] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Thomas Fritz
- Institute
of Pharmacy and Biochemistry, Johannes Gutenberg-University Mainz, Staudingerweg
5, 55122 Mainz, Germany
| | - Markus Hirsch
- Institute
of Pharmacy and Biochemistry, Johannes Gutenberg-University Mainz, Staudingerweg
5, 55122 Mainz, Germany
| | - Felix C. Richter
- Institute
of Pharmacy and Biochemistry, Johannes Gutenberg-University Mainz, Staudingerweg
5, 55122 Mainz, Germany
| | - Sophie S. Müller
- Institute
of Organic Chemistry, Johannes Gutenberg-University Mainz, Duesbergweg 10-14, 55122 Mainz, Germany
- Graduate School MAINZ, Staudingerweg
9, 55128 Mainz, Germany
| | - Anna M. Hofmann
- Institute
of Organic Chemistry, Johannes Gutenberg-University Mainz, Duesbergweg 10-14, 55122 Mainz, Germany
| | - Kristiane A. K. Rusitzka
- Institute
of Zoology, Johannes Gutenberg-University Mainz, J.-J. Becher-Weg
7, 55122 Mainz, Germany
| | - Jürgen Markl
- Institute
of Zoology, Johannes Gutenberg-University Mainz, J.-J. Becher-Weg
7, 55122 Mainz, Germany
| | - Ulrich Massing
- Department
of Clinical Research, Tumor Biology Center, 79106 Freiburg, Germany
| | - Holger Frey
- Institute
of Organic Chemistry, Johannes Gutenberg-University Mainz, Duesbergweg 10-14, 55122 Mainz, Germany
| | - Mark Helm
- Institute
of Pharmacy and Biochemistry, Johannes Gutenberg-University Mainz, Staudingerweg
5, 55122 Mainz, Germany
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23
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Thomas A, Müller SS, Frey H. Beyond Poly(ethylene glycol): Linear Polyglycerol as a Multifunctional Polyether for Biomedical and Pharmaceutical Applications. Biomacromolecules 2014; 15:1935-54. [DOI: 10.1021/bm5002608] [Citation(s) in RCA: 170] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Anja Thomas
- Institute
of Organic Chemistry, Johannes Gutenberg-University Mainz, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Sophie S. Müller
- Institute
of Organic Chemistry, Johannes Gutenberg-University Mainz, Duesbergweg 10-14, 55128 Mainz, Germany
- Graduate School Materials Science in Mainz, Staudingerweg 9, 55128 Mainz, Germany
| | - Holger Frey
- Institute
of Organic Chemistry, Johannes Gutenberg-University Mainz, Duesbergweg 10-14, 55128 Mainz, Germany
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24
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Cighetti R, Ciaramelli C, Sestito SE, Zanoni I, Kubik Ł, Ardá-Freire A, Calabrese V, Granucci F, Jerala R, Martín-Santamaría S, Jiménez-Barbero J, Peri F. Modulation of CD14 and TLR4·MD-2 activities by a synthetic lipid A mimetic. Chembiochem 2013; 15:250-8. [PMID: 24339336 DOI: 10.1002/cbic.201300588] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2013] [Indexed: 12/13/2022]
Abstract
Monosaccharide lipid A mimetics based on a glucosamine core linked to two fatty acid chains and bearing one or two phosphate groups have been synthesized. Compounds 1 and 2, each with one phosphate group, were practically inactive in inhibiting LPS-induced TLR4 signaling and cytokine production in HEK-blue cells and murine macrophages, but compound 3, with two phosphate groups, was found to be active in efficiently inhibiting TLR4 signal in both cell types. The direct interaction between compound 3 and the MD-2 coreceptor was investigated by NMR spectroscopy and molecular modeling/docking analysis. This compound also interacts directly with the CD14 receptor, stimulating its internalization by endocytosis. Experiments on macrophages show that the effect on CD14 reinforces the activity on MD-2·TLR4 because compound 3's activity is higher when CD14 is important for TLR4 signaling (i.e., at low LPS concentration). The dual targeting of MD-2 and CD14, accompanied by good solubility in water and lack of toxicity, suggests the use of monosaccharide 3 as a lead compound for the development of drugs directed against TLR4-related syndromes.
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Affiliation(s)
- Roberto Cighetti
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Piazza della Scienza 2, 20126 Milano (Italy)
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25
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Nag OK, Awasthi V. Surface engineering of liposomes for stealth behavior. Pharmaceutics 2013; 5:542-69. [PMID: 24300562 PMCID: PMC3873679 DOI: 10.3390/pharmaceutics5040542] [Citation(s) in RCA: 193] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2013] [Revised: 10/10/2013] [Accepted: 10/14/2013] [Indexed: 02/08/2023] Open
Abstract
Liposomes are used as a delivery vehicle for drug molecules and imaging agents. The major impetus in their biomedical applications comes from the ability to prolong their circulation half-life after administration. Conventional liposomes are easily recognized by the mononuclear phagocyte system and are rapidly cleared from the blood stream. Modification of the liposomal surface with hydrophilic polymers delays the elimination process by endowing them with stealth properties. In recent times, the development of various materials for surface engineering of liposomes and other nanomaterials has made remarkable progress. Poly(ethylene glycol)-linked phospholipids (PEG-PLs) are the best representatives of such materials. Although PEG-PLs have served the formulation scientists amazingly well, closer scrutiny has uncovered a few shortcomings, especially pertaining to immunogenicity and pharmaceutical characteristics (drug loading, targeting, etc.) of PEG. On the other hand, researchers have also begun questioning the biological behavior of the phospholipid portion in PEG-PLs. Consequently, stealth lipopolymers consisting of non-phospholipids and PEG-alternatives are being developed. These novel lipopolymers offer the potential advantages of structural versatility, reduced complement activation, greater stability, flexible handling and storage procedures and low cost. In this article, we review the materials available as alternatives to PEG and PEG-lipopolymers for effective surface modification of liposomes.
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Affiliation(s)
- Okhil K Nag
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Oklahoma Health Sciences Center, 1110 North Stonewall Avenue, Oklahoma City, OK 73117, USA.
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26
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Schüll C, Frey H. Grafting of hyperbranched polymers: From unusual complex polymer topologies to multivalent surface functionalization. POLYMER 2013. [DOI: 10.1016/j.polymer.2013.07.065] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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27
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Polyether-Based Lipids Synthesized with an Epoxide Construction Kit: Multivalent Architectures for Functional Liposomes. ACTA ACUST UNITED AC 2013. [DOI: 10.1021/bk-2013-1135.ch002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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28
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Oikawa Y, Lee S, Kim DH, Kang DH, Kim BS, Saito K, Sasaki S, Oishi Y, Shibasaki Y. One-Pot Synthesis of Linear-Hyperbranched Amphiphilic Block Copolymers Based on Polyglycerol Derivatives and Their Micelles. Biomacromolecules 2013; 14:2171-8. [DOI: 10.1021/bm400275w] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yurie Oikawa
- Department of Chemistry
and Bioengineering, Faculty of Engineering, Iwate University, 4-3-5 Ueda, Morioka, Iwate 020-8551,
Japan
| | - Sueun Lee
- Interdisciplinary
School of Green Energy, Ulsan National Institute of Science and Technology (UNIST), Ulsan 689-798, Korea
| | - Do Hyung Kim
- National Research
and Development Center for Hepatobiliary Cancer, Research Institute for Convergence of Biomedical Science and Technology, and School of Medicine, Pusan National University Yangsan Hospital, Gyeongnam 626-770,
Korea
| | - Dae Hwan Kang
- National Research
and Development Center for Hepatobiliary Cancer, Research Institute for Convergence of Biomedical Science and Technology, and School of Medicine, Pusan National University Yangsan Hospital, Gyeongnam 626-770,
Korea
| | - Byeong-Su Kim
- Interdisciplinary
School of Green Energy, Ulsan National Institute of Science and Technology (UNIST), Ulsan 689-798, Korea
| | - Kyohei Saito
- Department of Chemistry
and Bioengineering, Faculty of Engineering, Iwate University, 4-3-5 Ueda, Morioka, Iwate 020-8551,
Japan
| | - Shigeko Sasaki
- Department of Chemistry
and Bioengineering, Faculty of Engineering, Iwate University, 4-3-5 Ueda, Morioka, Iwate 020-8551,
Japan
| | - Yoshiyuki Oishi
- Department of Chemistry
and Bioengineering, Faculty of Engineering, Iwate University, 4-3-5 Ueda, Morioka, Iwate 020-8551,
Japan
| | - Yuji Shibasaki
- Department of Chemistry
and Bioengineering, Faculty of Engineering, Iwate University, 4-3-5 Ueda, Morioka, Iwate 020-8551,
Japan
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29
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Brocas AL, Mantzaridis C, Tunc D, Carlotti S. Polyether synthesis: From activated or metal-free anionic ring-opening polymerization of epoxides to functionalization. Prog Polym Sci 2013. [DOI: 10.1016/j.progpolymsci.2012.09.007] [Citation(s) in RCA: 188] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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30
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Dingels C, Müller SS, Steinbach T, Tonhauser C, Frey H. Universal Concept for the Implementation of a Single Cleavable Unit at Tunable Position in Functional Poly(ethylene glycol)s. Biomacromolecules 2013; 14:448-59. [DOI: 10.1021/bm3016797] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Carsten Dingels
- Department of Organic
Chemistry, Johannes Gutenberg-Universität Mainz, Duesbergweg 10-14, D-55099 Mainz, Germany
| | - Sophie S. Müller
- Department of Organic
Chemistry, Johannes Gutenberg-Universität Mainz, Duesbergweg 10-14, D-55099 Mainz, Germany
- Graduate School Materials Science in Mainz, Staudingerweg 9, D-55128
Mainz, Germany
| | - Tobias Steinbach
- Department of Organic
Chemistry, Johannes Gutenberg-Universität Mainz, Duesbergweg 10-14, D-55099 Mainz, Germany
- Graduate School Materials Science in Mainz, Staudingerweg 9, D-55128
Mainz, Germany
| | - Christine Tonhauser
- Department of Organic
Chemistry, Johannes Gutenberg-Universität Mainz, Duesbergweg 10-14, D-55099 Mainz, Germany
- Graduate School Materials Science in Mainz, Staudingerweg 9, D-55128
Mainz, Germany
| | - Holger Frey
- Department of Organic
Chemistry, Johannes Gutenberg-Universität Mainz, Duesbergweg 10-14, D-55099 Mainz, Germany
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31
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Murou M, Kitano H, Fujita M, Maeda M, Saruwatari Y. Self-association of zwitterionic polymer–lipid conjugates in water as examined by scattering measurements. J Colloid Interface Sci 2013; 390:47-53. [DOI: 10.1016/j.jcis.2012.09.035] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2012] [Revised: 09/14/2012] [Accepted: 09/16/2012] [Indexed: 11/25/2022]
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32
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Schöps R, Amado E, Müller SS, Frey H, Kressler J. Block copolymers in giant unilamellar vesicles with proteins or with phospholipids. Faraday Discuss 2013; 166:303-15. [DOI: 10.1039/c3fd00062a] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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33
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34
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Schulte B, Dannenberg CA, Keul H, Möller M. Formation of linear and cyclic polyoxetanes in the cationic ring-opening polymerization of 3-allyloxymethyl-3-ethyloxetane and subsequent postpolymerization modification of poly(3-allyloxymethyl-3-ethyloxetane). ACTA ACUST UNITED AC 2012. [DOI: 10.1002/pola.26494] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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35
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Peng X, Hofmann AM, Reuter S, Frey H, Kressler J. Mixed layers of DPPC and a linear poly(ethylene glycol)-b-hyperbranched poly(glycerol) block copolymer having a cholesteryl end group. Colloid Polym Sci 2012. [DOI: 10.1007/s00396-012-2613-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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36
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Mangold C, Wurm F, Frey H. Functional PEG-based polymers with reactive groups via anionic ROP of tailor-made epoxides. Polym Chem 2012. [DOI: 10.1039/c2py00489e] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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37
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Zhao J, Schlaad H, Weidner S, Antonietti M. Synthesis of terpene–poly(ethylene oxide)s by t-BuP4-promoted anionic ring-opening polymerization. Polym Chem 2012. [DOI: 10.1039/c1py00388g] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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38
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Hofmann AM, Wipf R, Stühn B, Frey H. Mesogen-Initiated Linear Polyglycerol Isomers: The Ordering Effect of a Single Cholesterol Unit on “Sticky” Isotropic Chains. Macromolecules 2011. [DOI: 10.1021/ma201210r] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Anna Maria Hofmann
- Institut für Organische Chemie, Johannes Gutenberg-Universität, Duesbergweg 10-14, 55099 Mainz, Germany
| | - Robert Wipf
- Institut für Festkörperphysik, Technische Universität Darmstadt, Hochschulstrasse 8, 64289 Darmstadt, Germany
| | - Bernd Stühn
- Institut für Festkörperphysik, Technische Universität Darmstadt, Hochschulstrasse 8, 64289 Darmstadt, Germany
| | - Holger Frey
- Institut für Organische Chemie, Johannes Gutenberg-Universität, Duesbergweg 10-14, 55099 Mainz, Germany
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39
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