1
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Xu Q, Li S, Qi M, Gao J, Chen C, Huang P, Wang Y, Yu C, Huang W, Zhou Y. Membrane‐Bound Inward‐Growth of Artificial Cytoskeletons and Their Selective Disassembly. Angew Chem Int Ed Engl 2022; 61:e202204440. [DOI: 10.1002/anie.202204440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Indexed: 11/11/2022]
Affiliation(s)
- Qingsong Xu
- School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China
| | - Shanlong Li
- School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China
| | - Meiwei Qi
- School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China
| | - Jing Gao
- School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China
| | - Chuanshuang Chen
- School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China
| | - Pei Huang
- School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China
| | - Yuling Wang
- School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China
| | - Chunyang Yu
- School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China
| | - Wei Huang
- School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China
| | - Yongfeng Zhou
- School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China
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2
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Xu Q, Li S, Qi M, Gao J, Chen C, Huang P, Wang Y, Yu C, Huang W, Zhou Y. Membrane‐Bound Inward‐Growth of Artificial Cytoskeletons and Their Selective Disassembly. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202204440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Qingsong Xu
- School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China
| | - Shanlong Li
- School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China
| | - Meiwei Qi
- School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China
| | - Jing Gao
- School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China
| | - Chuanshuang Chen
- School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China
| | - Pei Huang
- School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China
| | - Yuling Wang
- School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China
| | - Chunyang Yu
- School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China
| | - Wei Huang
- School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China
| | - Yongfeng Zhou
- School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China
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3
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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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4
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Höger GA, Wiegand M, Worbs B, Diederichsen U. Membrane-Associated Nucleobase-Functionalized β-Peptides (β-PNAs) Affecting Membrane Support and Lipid Composition. Chembiochem 2020; 21:2599-2603. [PMID: 32346953 PMCID: PMC7540700 DOI: 10.1002/cbic.202000172] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 04/26/2020] [Indexed: 11/18/2022]
Abstract
Protein-membrane interactions are essential to maintain membrane integrity and control membrane morphology and composition. Cytoskeletal proteins in particular are known to interact to a high degree with lipid bilayers and to line the cytoplasmic side of the plasma membrane with an extensive network structure. In order to gain a better mechanistical understanding of the protein-membrane interplay and possible membrane signaling, we started to develop a model system based on β-peptide nucleic acids (β-PNAs). These β-peptides are known to form stable hydrogen-bonded aggregates due to their helical secondary structure, which serve to pre-organize the attached nucleobases. After optimization of the β-PNA solid-phase peptide synthesis and validation of helix formation, the ability of the novel β-PNAs to dimerize and interact with lipid bilayers was investigated by both fluorescence and circular dichroism spectroscopy. It was shown that duplex formation occurs rapidly and with high specificity and could also be detected on the surfaces of the lipid bilayers. Hereby, the potential of a β-PNA-based peptide system to mimic membrane-associated protein networks could be demonstrated.
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Affiliation(s)
- Geralin A. Höger
- Institut für Organische und Biomolekulare ChemieGeorg-August-Universität GöttingenTammannstraße 237077GöttingenGermany
| | - Markus Wiegand
- Institut für Organische und Biomolekulare ChemieGeorg-August-Universität GöttingenTammannstraße 237077GöttingenGermany
| | - Brigitte Worbs
- Institut für Organische und Biomolekulare ChemieGeorg-August-Universität GöttingenTammannstraße 237077GöttingenGermany
| | - Ulf Diederichsen
- Institut für Organische und Biomolekulare ChemieGeorg-August-Universität GöttingenTammannstraße 237077GöttingenGermany
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5
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Xiong Q, Zhang X, Wei W, Wei G, Su Z. Enzyme-mediated reversible deactivation radical polymerization for functional materials: principles, synthesis, and applications. Polym Chem 2020. [DOI: 10.1039/d0py00136h] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Enzymes provide a potential and highly efficient way to mediate the formation of various functional polymer materials with wide applications.
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Affiliation(s)
- Qingyun Xiong
- State Key Laboratory of Chemical Resource Engineering
- Beijing Key Laboratory of Advanced Functional Polymer Composites
- Beijing University of Chemical Technology
- 100029 Beijing
- China
| | - Xiaoyuan Zhang
- Chair of Materials Science (CMS)
- Otto Schott Institute of Materials Research (OSIM)
- Friedrich Schiller University Jena
- Jena 07743
- Germany
| | - Wenfeng Wei
- State Key Laboratory of Chemical Resource Engineering
- Beijing Key Laboratory of Advanced Functional Polymer Composites
- Beijing University of Chemical Technology
- 100029 Beijing
- China
| | - Gang Wei
- College of Chemistry and Chemical Engineering
- Qingdao University
- 266071 Qingdao
- China
- Faculty of Production Engineering
| | - Zhiqiang Su
- State Key Laboratory of Chemical Resource Engineering
- Beijing Key Laboratory of Advanced Functional Polymer Composites
- Beijing University of Chemical Technology
- 100029 Beijing
- China
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6
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Rother M, Nussbaumer MG, Renggli K, Bruns N. Protein cages and synthetic polymers: a fruitful symbiosis for drug delivery applications, bionanotechnology and materials science. Chem Soc Rev 2016; 45:6213-6249. [DOI: 10.1039/c6cs00177g] [Citation(s) in RCA: 115] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Protein cages have become essential tools in bionanotechnology due to their well-defined, monodisperse, capsule-like structure. Combining them with synthetic polymers greatly expands their application, giving rise to novel nanomaterials fore.g.drug-delivery, sensing, electronic devices and for uses as nanoreactors.
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Affiliation(s)
- Martin Rother
- Department of Chemistry
- University of Basel
- CH-4056 Basel
- Switzerland
| | - Martin G. Nussbaumer
- Wyss Institute for Biologically Inspired Engineering
- Harvard University
- Cambridge
- USA
| | - Kasper Renggli
- Department of Biosystems Science and Engineering
- ETH Zürich
- 4058 Basel
- Switzerland
| | - Nico Bruns
- Adolphe Merkle Institute
- University of Fribourg
- CH-1700 Fribourg
- Switzerland
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7
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Choi HJ, Song JM, Bondy BJ, Compans RW, Kang SM, Prausnitz MR. Effect of Osmotic Pressure on the Stability of Whole Inactivated Influenza Vaccine for Coating on Microneedles. PLoS One 2015; 10:e0134431. [PMID: 26230936 PMCID: PMC4521748 DOI: 10.1371/journal.pone.0134431] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2015] [Accepted: 07/10/2015] [Indexed: 11/18/2022] Open
Abstract
Enveloped virus vaccines can be damaged by high osmotic strength solutions, such as those used to protect the vaccine antigen during drying, which contain high concentrations of sugars. We therefore studied shrinkage and activity loss of whole inactivated influenza virus in hyperosmotic solutions and used those findings to improve vaccine coating of microneedle patches for influenza vaccination. Using stopped-flow light scattering analysis, we found that the virus underwent an initial shrinkage on the order of 10% by volume within 5 s upon exposure to a hyperosmotic stress difference of 217 milliosmolarity. During this shrinkage, the virus envelope had very low osmotic water permeability (1 - 6×10-4 cm s-1) and high Arrhenius activation energy (Ea = 15.0 kcal mol-1), indicating that the water molecules diffused through the viral lipid membranes. After a quasi-stable state of approximately 20 s to 2 min, depending on the species and hypertonic osmotic strength difference of disaccharides, there was a second phase of viral shrinkage. At the highest osmotic strengths, this led to an undulating light scattering profile that appeared to be related to perturbation of the viral envelope resulting in loss of virus activity, as determined by in vitro hemagglutination measurements and in vivo immunogenicity studies in mice. Addition of carboxymethyl cellulose effectively prevented vaccine activity loss in vitro and in vivo, believed to be due to increasing the viscosity of concentrated sugar solution and thereby reducing osmotic stress during coating of microneedles. These results suggest that hyperosmotic solutions can cause biphasic shrinkage of whole inactivated influenza virus which can damage vaccine activity at high osmotic strength and that addition of a viscosity enhancer to the vaccine coating solution can prevent osmotically driven damage and thereby enable preparation of stable microneedle coating formulations for vaccination.
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Affiliation(s)
- Hyo-Jick Choi
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia, United States of America
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, Canada
| | - Jae-Min Song
- Department of Global Medical Science, Sungshin Women's University, Seoul, Korea
| | - Brian J. Bondy
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia, United States of America
| | - Richard W. Compans
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, Georgia, United States of America
| | - Sang-Moo Kang
- Center for Inflammation, Immunity, & Infection and Department of Biology, Georgia State University, Atlanta, Georgia, United States of America
| | - Mark R. Prausnitz
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia, United States of America
- * E-mail:
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8
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Dinu MV, Spulber M, Renggli K, Wu D, Monnier CA, Petri-Fink A, Bruns N. Filling Polymersomes with Polymers by Peroxidase-Catalyzed Atom Transfer Radical Polymerization. Macromol Rapid Commun 2015; 36:507-14. [DOI: 10.1002/marc.201400642] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Revised: 12/16/2014] [Indexed: 01/20/2023]
Affiliation(s)
- Maria Valentina Dinu
- Department of Chemistry; University of Basel; Klingelbergstrasse 80 4056 Basel Switzerland
| | - Mariana Spulber
- Department of Chemistry; University of Basel; Klingelbergstrasse 80 4056 Basel Switzerland
| | - Kasper Renggli
- Department of Chemistry; University of Basel; Klingelbergstrasse 80 4056 Basel Switzerland
- Department of Biological Engineering; Massachusetts Institute of Technology; 77 Massachusetts Avenue Cambridge MA 02139 USA
| | - Dalin Wu
- Department of Chemistry; University of Basel; Klingelbergstrasse 80 4056 Basel Switzerland
| | - Christophe A. Monnier
- Adolphe Merkle Institute; University of Fribourg; Chemin des Verdiers 4 1700 Fribourg Switzerland
| | - Alke Petri-Fink
- Adolphe Merkle Institute; University of Fribourg; Chemin des Verdiers 4 1700 Fribourg Switzerland
| | - Nico Bruns
- Department of Chemistry; University of Basel; Klingelbergstrasse 80 4056 Basel Switzerland
- Adolphe Merkle Institute; University of Fribourg; Chemin des Verdiers 4 1700 Fribourg Switzerland
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9
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Habel J, Ogbonna A, Larsen N, Cherré S, Kynde S, Midtgaard SR, Kinoshita K, Krabbe S, Jensen GV, Hansen JS, Almdal K, Hèlix-Nielsen C. Selecting analytical tools for characterization of polymersomes in aqueous solution. RSC Adv 2015. [DOI: 10.1039/c5ra16403f] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
We present 17 techniques to analyze polymersomes, in terms of their size, bilayer properties, elastic properties or surface charge.
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Affiliation(s)
- Joachim Habel
- Technical University of Denmark
- Department of Environmental Engineering
- 2800 Kgs. Lyngby
- Denmark
- Aquaporin A/S
| | | | - Nanna Larsen
- University of Copenhagen
- Copenhagen Biocenter
- 2200 Copenhagen
- Denmark
| | - Solène Cherré
- Technical University of Denmark
- Department of Micro- and Nanotechnology
- 2800 Kgs. Lyngby
- Denmark
| | - Søren Kynde
- University of Copenhagen
- Niels Bohr Institute
- 2100 Copenhagen
- Denmark
| | | | - Koji Kinoshita
- University of Southern Denmark
- Department of Physics
- Chemistry and Pharmacy
- 5230 Odense
- Denmark
| | - Simon Krabbe
- University of Copenhagen
- Department of Biology
- 2100 Copenhagen
- Denmark
| | | | | | - Kristoffer Almdal
- Technical University of Denmark
- Department of Micro- and Nanotechnology
- 2800 Kgs. Lyngby
- Denmark
| | - Claus Hèlix-Nielsen
- Technical University of Denmark
- Department of Environmental Engineering
- 2800 Kgs. Lyngby
- Denmark
- Aquaporin A/S
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10
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Mihut AM, Dabkowska AP, Crassous JJ, Schurtenberger P, Nylander T. Tunable adsorption of soft colloids on model biomembranes. ACS NANO 2013; 7:10752-10763. [PMID: 24191704 DOI: 10.1021/nn403892f] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A simple procedure is developed to probe in situ the association between lipid bilayers and colloidal particles. Here, a one-step method is applied to generate giant unilamellar 1,2-dioleoyl-sn-glycero-3-phosphocholine (DOPC) vesicles (GUVs) by application of an alternating electric field directly in the presence of thermoresponsive poly(N-isopropylacrylamide) (PNIPAM) microgels. We demonstrate that the soft PNIPAM microgel particles act as switchable stabilizers for lipid membranes. The change of the particle conformation from the swollen to the collapsed state enables the reversible control of the microgel adsorption as a function of temperature. At 20 °C, the swollen and hydrophilic soft microgel particles adsorb evenly and densely pack in 2D hexagonal arrays at the DOPC GUV surfaces. In contrast, at 40 °C, that is, above the volume phase transition temperature (TVPT = 32 °C) of the PNIPAM microgels, the collapsed and more hydrophobic particles partially desorb and self-organize into domains at the GUV/GUV interfaces. This study shows that thermoresponsive PNIPAM microgels can be used to increase and control the stability of lipid vesicles where the softness and deformability of these types of particles play a major role. The observed self-assembly, where the organization and position of the particles on the GUV surface can be controlled "on demand", opens new routes for the design of nanostructured materials.
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Affiliation(s)
- Adriana M Mihut
- Physical Chemistry, Department of Chemistry, Lund University , 22100 Lund, Sweden
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11
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Dayani Y, Malmstadt N. Liposomes with double-stranded DNA anchoring the bilayer to a hydrogel core. Biomacromolecules 2013; 14:3380-5. [PMID: 24083513 PMCID: PMC3874235 DOI: 10.1021/bm401155a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Liposomes are important biomolecular nanostructures for handling membrane-associated molecules in the lab and delivering drugs in the clinic. In addition to their biomedical applications, they have been widely used as model cell membranes in biophysical studies. Here we present a liposome-based model membrane that mimics the attachment of membrane-resident molecules to the cytoskeleton. To facilitate this attachment, we have developed a lipid-based hybrid nanostructure in which the liposome bilayer membrane is covalently anchored to a biocompatible poly(ethylene) glycol (PEG) hydrogel core using short double-stranded DNA (dsDNA) linkers. The dsDNA linkers connect cholesterol groups that reside in the bilayer to vinyl groups that are incorporated in the cross-linked hydrogel backbone. Size exclusion chromatography (SEC) of intact and surfactant-treated nanoparticles confirms the formation of anchored hydrogel structures. Transmission electron microscopy (TEM) shows ~100 nm nanoparticles even after removal of unanchored phospholipids. The location of dsDNA groups at the hydrogel-bilayer interface is confirmed with a fluorescence assay. Using DNA as a linker between the bilayer and a hydrogel core allows for temperature-dependent release of the anchoring interaction, produces polymer nanogels with addressible hybridization sites on their surface, and provides a prototype structure for potential future oligonucleotide drug delivery applications.
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Affiliation(s)
- Yasaman Dayani
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089, United States
| | - Noah Malmstadt
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089, United States
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12
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Lee MS, Mok EY, Kim JC. Temperature-driven Precipitation of poly(N-isopropylacrylamide-co-methacrylic acid) in Cationic, Anionic and Nonionic Surfactant Solutions. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2013. [DOI: 10.1080/10601325.2013.821906] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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13
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Levi L, Srebnik S. Simulation of Protein-Imprinted Polymers. 2. Imprinting Efficiency. J Phys Chem B 2010; 114:16744-51. [DOI: 10.1021/jp108762t] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Liora Levi
- Department of Chemical Engineering, Technion-Israel Institute of Technology, Haifa, 32000 Israel
| | - Simcha Srebnik
- Department of Chemical Engineering, Technion-Israel Institute of Technology, Haifa, 32000 Israel
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14
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Holzer M, Momm J, Schubert R. Lipid transfer mediated by a recombinant pro-sterol carrier protein 2 for the accurate preparation of asymmetrical membrane vesicles requires a narrow vesicle size distribution: a free-flow electrophoresis study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:4142-4151. [PMID: 20095535 DOI: 10.1021/la903386d] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We applied protein-mediated lipid transfer using recombinant His-tagged pro-sterol carrier protein 2 (pro-SCP2) to prepare asymmetrical membrane vesicles (AMV) featuring an unequal transmembrane distribution of the negative phospholipid egg-phosphatidylglycerol (EPG). Pure egg-phosphatidylcholine (EPC) vesicles were used as the acceptor and EPC:EPG 90:10 mol % vesicles as the donor populations. The changes in surface charge during EPG transfer were used to quantify the degree of asymmetry by free-flow electrophoresis (FFE). The relative deflection in FFE correlated with EPG content in the outer monolayer (x(EPG)). The initial transfer rates and first order rate constants for the transfer process were determined. The addition of pro-SCP2 at a molar protein-to-lipid ratio R(P/L) of (15-20) x 10(-5) accelerated the EPG transfer to half-times of between 2 and 3 h. Thus, the transmembrane redistribution of EPG by flip-flop, which reduces the degree of asymmetry and occurs at half-times of tens of hours, was minimized during the transfer process. We investigated the influence of membrane curvature on the transfer rate using 50 and 100 nm vesicles with very low size distribution widths (RSD of 13-17%). Transfer occurred with a 55.7% higher initial rate between the smaller vesicles. The use of equally sized acceptor and donor populations of such narrow size distributions was shown to be important for the preparation of AMV with a uniform degree of asymmetry. Under these conditions, AMV were obtained after less than 3 h by preparative FFE separation. In the case of the acceptor vesicles, EPG transfer increased x(EPG) to 3 mol %, whereas it was reduced to 6 mol % in the donor vesicles.
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Affiliation(s)
- Martin Holzer
- Department of Pharmaceutical Technology and Biopharmacy, Albert-Ludwigs-University Freiburg, D-79104 Freiburg, Germany.
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15
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Hofmann AM, Wurm F, Hühn E, Nawroth T, Langguth P, Frey H. Hyperbranched Polyglycerol-Based Lipids via Oxyanionic Polymerization: Toward Multifunctional Stealth Liposomes. Biomacromolecules 2010; 11:568-74. [DOI: 10.1021/bm901123j] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Anna Maria Hofmann
- Institute of Organic Chemistry, Johannes Gutenberg-Universität, Duesbergweg 10−14, Mainz, Germany, Institute of Pharmacy and Biochemistry, Johannes Gutenberg-Universität, Staudingerweg 5, Mainz, Germany
| | - Frederik Wurm
- Institute of Organic Chemistry, Johannes Gutenberg-Universität, Duesbergweg 10−14, Mainz, Germany, Institute of Pharmacy and Biochemistry, Johannes Gutenberg-Universität, Staudingerweg 5, Mainz, Germany
| | - Eva Hühn
- Institute of Organic Chemistry, Johannes Gutenberg-Universität, Duesbergweg 10−14, Mainz, Germany, Institute of Pharmacy and Biochemistry, Johannes Gutenberg-Universität, Staudingerweg 5, Mainz, Germany
| | - Thomas Nawroth
- Institute of Organic Chemistry, Johannes Gutenberg-Universität, Duesbergweg 10−14, Mainz, Germany, Institute of Pharmacy and Biochemistry, Johannes Gutenberg-Universität, Staudingerweg 5, Mainz, Germany
| | - Peter Langguth
- Institute of Organic Chemistry, Johannes Gutenberg-Universität, Duesbergweg 10−14, Mainz, Germany, Institute of Pharmacy and Biochemistry, Johannes Gutenberg-Universität, Staudingerweg 5, Mainz, Germany
| | - Holger Frey
- Institute of Organic Chemistry, Johannes Gutenberg-Universität, Duesbergweg 10−14, Mainz, Germany, Institute of Pharmacy and Biochemistry, Johannes Gutenberg-Universität, Staudingerweg 5, Mainz, Germany
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16
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Gaspard J, Hahn MS, Silas JA. Polymerization of hydrogels inside self-assembled block copolymer vesicles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:12878-12884. [PMID: 19835397 DOI: 10.1021/la901419w] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Block copolymer vesicles are powerful tools for investigating cell adhesion since they display the fluid, deformable, semipermeable membrane properties of lipid vesicles while having greater chemical and mechanical stability. The aim of the present study was to fabricate block copolymer vesicles containing hydrogel interiors in order to extend achievable vesicle properties and, thereby, their range of cell-like behaviors. Block copolymer vesicles based on poly(butadiene-b-ethylene oxide) were demonstrated to compartmentalize and retain acrylamide solutions through particle dialysis and to allow for subsequent in situ hydrogel polymerization. Small molecule leakage studies of the resulting particles indicated that the cross-link density of the hydrogel interiors had minimal impact on vesicle permeability to small molecules (<430 Da) relative to vesicle membrane properties. In contrast, particle deformation analyses indicated that initial vesicle surface approach and adhesion was dominated by its membrane properties, whereas its ultimate deformation was primarily governed by the hydrogel interior. Thus, the hydrogel-containing vesicles allowed orthogonal control of particle surface and mechanical properties. Analysis of particle behavior in terms of Gibb's free energy minimization indicated that vesicle adhesion energy, membrane tension, and internal osmotic pressure dominated particle adhesion and deformation. Combined, the present work demonstrates the potential for designing compartmentalized, hierarchical polymer-based cell mimics with broadly tunable dynamic-mechanical properties and surface properties.
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Affiliation(s)
- Jeffery Gaspard
- Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, USA
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Campillo CC, Schroder AP, Marques CM, Pépin-Donat B. Composite gel-filled giant vesicles: Membrane homogeneity and mechanical properties. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2009. [DOI: 10.1016/j.msec.2008.08.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Abkarian M, Viallat A. Vesicles and red blood cells in shear flow. SOFT MATTER 2008; 4:653-657. [PMID: 32907167 DOI: 10.1039/b716612e] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We describe the similarities and the specificities of the behaviour of individual soft particles, namely, drops, lipid vesicles and red blood cells subjected to a shear flow. We highlight that their motion depends in a non-trivial way on the particle mechanical properties. We detail the effect of the presence of a wall with or without wall-particle attractive interaction from a biological perspective.
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Affiliation(s)
- Manouk Abkarian
- Laboratoire des Colloïdes, Verres et Nanomatériaux, CNRS UMR 5587, Université Montpellier II, Place Eugène Bataillon, Montpellier, 34095, France.
| | - Annie Viallat
- Adhésion et Inflammation, Inserm U600, CNRS UMR 62 12 Université Méditerranée, case 937, 163 av de Luminy, Marseille Cedex, 13288, France.
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Campillo C, Pépin-Donat B, Viallat A. Responsive viscoelastic giant lipid vesicles filled with a poly(N-isopropylacrylamide) artificial cytoskeleton. SOFT MATTER 2007; 3:1421-1427. [PMID: 32900123 DOI: 10.1039/b710474j] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Responsive giant lipid vesicles filled with aqueous PolyNipam sol (SFV) or gel (GFV) were prepared by ultra-violet polymerisation performed in situ. Upon crossing the lower critical transition temperature of PolyNipam, SFVs and GFVs undergo a significant change of their structural and mechanical properties or a drastic volume transition, respectively. Rheometric and micropipette experiments show that both internal viscosity of SFVs and internal shear modulus of GFVs are tunable over several orders of magnitude and lie in the range observed for living cells. Moreover, the vesicle membrane is strongly bound to the internal polymer medium, making these systems interesting for mimicking the basic mechanical behaviour of passive living cells.
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Affiliation(s)
- Clément Campillo
- Adhésion et Inflammation, Inserm U600, CNRS UMR 62 12 Université Méditerranée, case 937, 163 av de Luminy, 13288 Marseille Cedex, France.
| | - Brigitte Pépin-Donat
- Laboratoire d'Electronique Moléculaire et Hybride, UMR 5819 SPrAM (CEA-CNRS-UJF)/DRFMC/CEA-Grenoble, 38054 Grenoble Cedex 9, France.
| | - Annie Viallat
- Adhésion et Inflammation, Inserm U600, CNRS UMR 62 12 Université Méditerranée, case 937, 163 av de Luminy, 13288 Marseille Cedex, France.
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Role of alkyl chain length and mole concentration of hydrophobic moiety in association behavior of amphiphilic polyelectrolytes in aqueous media. Colloids Surf A Physicochem Eng Asp 2007. [DOI: 10.1016/j.colsurfa.2006.07.048] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Steenpass T, Lung A, Schubert R. Tresylated PEG-sterols for coupling of proteins to preformed plain or PEGylated liposomes. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2006; 1758:20-8. [PMID: 16483539 DOI: 10.1016/j.bbamem.2005.12.010] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2005] [Revised: 12/12/2005] [Accepted: 12/21/2005] [Indexed: 11/28/2022]
Abstract
A simple and inexpensive method for functionalization of preformed liposomes is presented. Soy sterol-PEG1300 ethers are activated by tresylation at the end of the PEG chain. Coupling of bovine serum albumin as an amino group containing model ligand to the activated lipids can be performed at pH 8.4 with high efficiency. At room temperature, the mixture of sterol-PEG and sterol-PEG-protein inserts rapidly into the outer liposome monolayer with high efficiency (>100 microg protein/mumol total lipid). This method of post-functionalization is shown to be effective with fluid or rigid and plain or pre-PEGylated liposomes (EPC/Chol, 7:3; HSPC/Chol 2:1, and EPC/Chol/MPEG2000-DSPE 2:1:0.16 molar ratios). The release of entrapped calcein upon the insertion of 7.5 mol% of the functionalized sterols is lower than 4%. Incubation of post-functionalized liposomes with serum for 20 h at 37 degrees C shows stable protein attachment at the liposome surface.
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Affiliation(s)
- Thomas Steenpass
- Institute of Pharmaceutical Sciences, Department of Pharmaceutical Technology and Biopharmacy, Hermann-Herder-Str. 9, D-79104 Freiburg, Germany
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Viallat A, Dalous J, Abkarian M. Giant lipid vesicles filled with a gel: shape instability induced by osmotic shrinkage. Biophys J 2004; 86:2179-87. [PMID: 15041658 PMCID: PMC1304069 DOI: 10.1016/s0006-3495(04)74277-0] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
We report the properties of giant lipid vesicles enclosing an agarose gel. In this system, the lipid bilayer retains some basic properties of biological membranes and the internal fluid exhibits viscoelastic properties, thus permitting us to address the question of the deformation of a cell membrane in relation to the mechanical properties of its cytoskeleton. The agarose gel (concentration c0gel = 0.07%, 0.18%, 0.36%, and 1% w/w), likely not anchored to the membrane, confers to the internal volume elastic moduli in the range of 10-10(4) Pa. Shapes and kinetics of de-swelling of gel-filled and aqueous solution-filled vesicles are compared upon either a progressive or a fast osmotic shrinkage. Both systems exhibit similar kinetics. Shapes of solution-filled vesicles are well described using the area difference elasticity model, whereas gel-filled vesicles present original patterns: facets, bumps, spikes (c0gel < 0.36%), or wrinkles (c0gel > or = 0.36%). These shapes partially vanish upon re-swelling, and some of them are reminiscent of echinocytic shapes of erythrocytes. Their characteristic size (microns) decreases upon increasing c0gel. A possible origin of these patterns, relying on the formation of a dense impermeable gel layer at the vesicle surface and associated with a transition toward a collapsed gel phase, is advanced.
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Affiliation(s)
- A Viallat
- Laboratoire de Spectrométrie Physique, Université J. Fourier, Saint Martin d'Hères, France.
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Palmer AF, Wingert P, Nickels J. Atomic force microscopy and light scattering of small unilamellar actin-containing liposomes. Biophys J 2003; 85:1233-47. [PMID: 12885667 PMCID: PMC1303241 DOI: 10.1016/s0006-3495(03)74559-7] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Three-dimensional networks of filamentous actin (F-actin) encapsulated inside phosphatidylcholine liposomes are currently being used in an effort to model the cytoskeleton and plasma membrane of eukaryotic cells. In this article, unilamellar lipid vesicles consisting of egg yolk-derived phosphatidylcholine encapsulating monomeric actin (G-actin) were made via extrusion in low ionic strength buffer (G-buffer). Vesicle shape and structure in these dispersions was studied using a combination of fluid-tapping atomic force microscopy, and multiangle static light scattering. After subjecting the liposome dispersion to high ionic strength polymerization buffer (F-buffer) containing K(+) ions, atomic force microscopy imaging and light scattering of these liposomes indicated the formation of specialized structures, including an overall liposome structure transformation from spherical to torus, disk-shaped geometries and tubular assemblies. Several atomic force microscopy control measurements were made to ascertain that the specialized structures formed were not due to free G-actin and F-actin self-assembling on the sample surface, plain liposomes exposed to G- and F-buffer, or liposomes encapsulating G-actin. Liposomes encapsulating G-actin assumed mostly thin disk shapes and some large irregularly shaped aggregates. In contrast, liposomes encapsulating polymerized actin assumed mostly torus or disk shapes along with some high aspect ratio tubular structures.
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Affiliation(s)
- Andre F Palmer
- Department of Chemical and Biomolecular Engineering, Center for Molecularly Engineered Materials, University of Notre Dame, Notre Dame, Indiana 46556, USA.
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