1
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Poloxamer 188 as surfactant in biological formulations - An alternative for polysorbate 20/80? Int J Pharm 2022; 620:121706. [PMID: 35367584 DOI: 10.1016/j.ijpharm.2022.121706] [Citation(s) in RCA: 32] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 03/05/2022] [Accepted: 03/26/2022] [Indexed: 01/25/2023]
Abstract
Surfactants are used to stabilize biologics. Particularly, polysorbates (Tween® 20 and Tween® 80) dominate the group of surfactants in protein and especially antibody drug products. Since decades drug developers rely on the ethoxylated sorbitan fatty acid ester mixtures to stabilize sensitive molecules such as proteins. Reasons are (i) excellent stabilizing properties, and (ii) well recognized safety and tolerability profile of these polysorbates in humans, especially for parenteral applications. However, over the past decade concerns regarding the stability of these two polysorbates were raised. The search of alternatives with preferably less reservations concerning degradation and product quality reducing issues leads, among others, to poloxamer 188 (e.g. Kolliphor® P188), a nonionic triblock-copolymer surfactant. This review sums up our current knowledge related to the characterization and physico-chemical properties of poloxamer 188, its analytics and stability properties for biological formulations. Furthermore, the advantages and disadvantages as a suitable polysorbate-alternative for the stabilization of biologics are discussed.
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Rizvi A, Mulvey JT, Patterson JP. Observation of Liquid-Liquid-Phase Separation and Vesicle Spreading during Supported Bilayer Formation via Liquid-Phase Transmission Electron Microscopy. NANO LETTERS 2021; 21:10325-10332. [PMID: 34890211 DOI: 10.1021/acs.nanolett.1c03556] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Liquid-phase transmission electron microscopy (LP-TEM) enables the real-time visualization of nanoscale dynamics in solution. This technique has been used to study the formation and transformation mechanisms of organic and inorganic nanomaterials. Here, we study the formation of block-copolymer-supported bilayers using LP-TEM. We observe two formation pathways that involve either liquid droplets or vesicles as intermediates toward supported bilayers. Quantitative image analysis methods are used to characterize vesicle spread rates and show the origin of defect formation in supported bilayers. Our results suggest that bilayer assembly methods that proceed via liquid droplet intermediates should be beneficial for forming pristine supported bilayers. Furthermore, supported bilayers inside the liquid cells may be used to image membrane interactions with proteins and nanoparticles in the future.
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Affiliation(s)
- Aoon Rizvi
- Department of Chemistry, University of California, Irvine, Irvine, California 92697-2025, United States
| | - Justin T Mulvey
- Department of Materials Science and Engineering, University of California, Irvine, Irvine, California 92697-2025, United States
| | - Joseph P Patterson
- Department of Chemistry, University of California, Irvine, Irvine, California 92697-2025, United States
- Department of Materials Science and Engineering, University of California, Irvine, Irvine, California 92697-2025, United States
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3
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Di Leone S, Avsar SY, Belluati A, Wehr R, Palivan CG, Meier W. Polymer–Lipid Hybrid Membranes as a Model Platform to Drive Membrane–Cytochrome c Interaction and Peroxidase-like Activity. J Phys Chem B 2020; 124:4454-4465. [DOI: 10.1021/acs.jpcb.0c02727] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Stefano Di Leone
- Chemistry Department, University of Basel, BPR 1096, Mattenstrasse 24a, 4058 Basel, Switzerland
- School of Life Sciences, Institute for Chemistry and Bioanalytics, University of Applied Sciences Northwestern Switzerland (FHNW), Grundenstrasse 40, 4132 Muttenz, Switzerland
| | - Saziye Yorulmaz Avsar
- Chemistry Department, University of Basel, BPR 1096, Mattenstrasse 24a, 4058 Basel, Switzerland
| | - Andrea Belluati
- Chemistry Department, University of Basel, BPR 1096, Mattenstrasse 24a, 4058 Basel, Switzerland
| | - Riccardo Wehr
- Chemistry Department, University of Basel, BPR 1096, Mattenstrasse 24a, 4058 Basel, Switzerland
| | - Cornelia G. Palivan
- Chemistry Department, University of Basel, BPR 1096, Mattenstrasse 24a, 4058 Basel, Switzerland
| | - Wolfgang Meier
- Chemistry Department, University of Basel, BPR 1096, Mattenstrasse 24a, 4058 Basel, Switzerland
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4
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Molecular organization relationship of low-bandgap polymers at the air-water interface and in solid films. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.07.018] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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5
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Draghici C, Mikhalevich V, Gunkel-Grabole G, Kowal J, Meier W, Palivan CG. Biomimetic Planar Polymer Membranes Decorated with Enzymes as Functional Surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:9015-9024. [PMID: 29972642 DOI: 10.1021/acs.langmuir.8b00541] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Functional surfaces were generated by a combination of enzymes with polymer membranes composed of an amphiphilic, asymmetric block copolymer poly(ethyleneglycol)- block-poly(γ-methyl-ε-caprolactone)- block-poly[(2-dimethylamino)ethylmethacrylate]. First, polymer films formed at the air-water interface were transferred in different sequences onto silica solid support using the Langmuir-Blodgett technique, generating homogeneous monolayers and bilayers. A detailed characterization of these films provided insight into their properties (film thickness, wettability, topography, and roughness). On the basis of these findings, the most promising membranes were selected for enzyme attachment. Functional surfaces were then generated by the adsorption of two model enzymes that can convert phenol and its derivatives (laccase and tyrosinase), well known as high-risk pollutants of drinking and natural water. Both enzymes preserved their activity upon immobilization with respect to their substrates. Depending on the properties of the polymer films, different degrees of enzymatic activity were observed: bilayers provided the best conditions in terms of both overall stability and enzymatic activity. The interaction between amphiphilic triblock copolymer films and enzymes is exploited to engineer "active surfaces" with specific functionalities and high efficacy resulting from the intrinsic activity of the biomolecules that is preserved by an appropriate synthetic environment.
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Affiliation(s)
- Camelia Draghici
- Chemistry Department , University of Basel , Mattenstrasse 24a , BPR 1096, 4002 Basel , Switzerland
- Product Design, Mechatronics and Environment Department , Transilvania University of Brasov , 29 Eroilor Blv , 500036 Brasov , Romania
| | - Viktoria Mikhalevich
- Chemistry Department , University of Basel , Mattenstrasse 24a , BPR 1096, 4002 Basel , Switzerland
| | - Gesine Gunkel-Grabole
- Chemistry Department , University of Basel , Mattenstrasse 24a , BPR 1096, 4002 Basel , Switzerland
| | - Justyna Kowal
- Chemistry Department , University of Basel , Mattenstrasse 24a , BPR 1096, 4002 Basel , Switzerland
| | - Wolfgang Meier
- Chemistry Department , University of Basel , Mattenstrasse 24a , BPR 1096, 4002 Basel , Switzerland
| | - Cornelia G Palivan
- Chemistry Department , University of Basel , Mattenstrasse 24a , BPR 1096, 4002 Basel , Switzerland
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6
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Su Z, Shodiev M, Jay Leitch J, Abbasi F, Lipkowski J. In situ electrochemical and PM-IRRAS studies of alamethicin ion channel formation in model phospholipid bilayers. J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2017.10.042] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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7
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Yang YL, Chen MY, Tsao HK, Sheng YJ. Dynamics of bridge-loop transformation in a membrane with mixed monolayer/bilayer structures. Phys Chem Chem Phys 2018; 20:6582-6590. [PMID: 29450428 DOI: 10.1039/c7cp08107c] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Instead of forming a typical bilayer or monolayer membrane, both the bridge (I-shape) and loop (U-shape) conformations coexist in the planar membranes formed by ABA triblock copolymers in a selective solvent. The non-equilibrium and equilibrium relaxation dynamics of polymer conformations are monitored. The non-equilibrium relaxation time depends on the initial composition and increases with an increase in the immiscibility between A and B blocks. The equilibrium composition of the loop-shape polymer is independent of the initial composition and A-B immiscibility. However, the extent of equilibrium composition fluctuations subsides as the A and B blocks become highly incompatible. The influences of the A-B immiscibility on the geometrical, mechanical, and transport properties of the membrane have also been investigated. As the immiscibility increases, the overall membrane thickness and the B block layer thickness (h) increase because of the increment in the molecular packing density. As a result, both the stretching (KA) and bending (KB) moduli grow significantly with the increasing A-B immiscibility. Consistent with the case of typical membranes, the ratio KB/KAh2 = 2 × 10-3 is a constant. Although the lateral diffusivity of polymers is insensitive to immiscibility, the membrane permeability decreases substantially as the A-B immiscibility is increased.
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Affiliation(s)
- Yan-Ling Yang
- Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan 106, Republic of China.
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Mikhalevich V, Craciun I, Kyropoulou M, Palivan CG, Meier W. Amphiphilic Peptide Self-Assembly: Expansion to Hybrid Materials. Biomacromolecules 2017; 18:3471-3480. [DOI: 10.1021/acs.biomac.7b00764] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Viktoria Mikhalevich
- University of Basel, Department of Chemistry, Klingelbergstrasse 80, 4056 Basel, Switzerland
| | - Ioana Craciun
- University of Basel, Department of Chemistry, Klingelbergstrasse 80, 4056 Basel, Switzerland
| | - Myrto Kyropoulou
- University of Basel, Department of Chemistry, Klingelbergstrasse 80, 4056 Basel, Switzerland
| | - Cornelia G. Palivan
- University of Basel, Department of Chemistry, Klingelbergstrasse 80, 4056 Basel, Switzerland
| | - Wolfgang Meier
- University of Basel, Department of Chemistry, Klingelbergstrasse 80, 4056 Basel, Switzerland
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9
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Pillai SA, Bharatiya B, Casas M, Lage EV, Sandez-Macho I, Pal H, Bahadur P. A multitechnique approach on adsorption, self-assembly and quercetin solubilization by Tetronics® micelles in aqueous solutions modulated by glycine. Colloids Surf B Biointerfaces 2016; 148:411-421. [DOI: 10.1016/j.colsurfb.2016.09.014] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Revised: 08/25/2016] [Accepted: 09/10/2016] [Indexed: 10/21/2022]
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10
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Garni M, Thamboo S, Schoenenberger CA, Palivan CG. Biopores/membrane proteins in synthetic polymer membranes. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2016; 1859:619-638. [PMID: 27984019 DOI: 10.1016/j.bbamem.2016.10.015] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Revised: 10/20/2016] [Accepted: 10/25/2016] [Indexed: 12/14/2022]
Abstract
BACKGROUND Mimicking cell membranes by simple models based on the reconstitution of membrane proteins in lipid bilayers represents a straightforward approach to understand biological function of these proteins. This biomimetic strategy has been extended to synthetic membranes that have advantages in terms of chemical and mechanical stability, thus providing more robust hybrid membranes. SCOPE OF THE REVIEW We present here how membrane proteins and biopores have been inserted both in the membrane of nanosized and microsized compartments, and in planar membranes under various conditions. Such bio-hybrid membranes have new properties (as for example, permeability to ions/molecules), and functionality depending on the specificity of the inserted biomolecules. Interestingly, membrane proteins can be functionally inserted in synthetic membranes provided these have appropriate properties to overcome the high hydrophobic mismatch between the size of the biomolecule and the membrane thickness. MAJOR CONCLUSION Functional insertion of membrane proteins and biopores in synthetic membranes of compartments or in planar membranes is possible by an appropriate selection of the amphiphilic copolymers, and conditions of the self-assembly process. These hybrid membranes have new properties and functionality based on the specificity of the biomolecules and the nature of the synthetic membranes. GENERAL SIGNIFICANCE Bio-hybrid membranes represent new solutions for the development of nanoreactors, artificial organelles or active surfaces/membranes that, by further gaining in complexity and functionality, will promote translational applications. This article is part of a Special Issue entitled: Lipid order/lipid defects and lipid-control of protein activity edited by Dirk Schneider.
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Affiliation(s)
- Martina Garni
- Chemistry Department, University of Basel, Klingelbergstrasse 80, Switzerland
| | - Sagana Thamboo
- Chemistry Department, University of Basel, Klingelbergstrasse 80, Switzerland
| | | | - Cornelia G Palivan
- Chemistry Department, University of Basel, Klingelbergstrasse 80, Switzerland.
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11
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Yang YL, Tsao HK, Sheng YJ. Solid-supported polymer bilayers formed by coil-coil block copolymers. SOFT MATTER 2016; 12:6442-6450. [PMID: 27418114 DOI: 10.1039/c6sm00741d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The formation and physical properties of solid-supported polymer bilayers (SPBs) on an adhesive substrate have been explored by dissipative particle dynamics simulations. A SPB is developed by the adsorption of vesicles formed by diblock copolymers in a selective solvent. The adsorbed vesicle can remain intact or become ruptured into a SPB, depending on the interaction between solvophobic blocks and solvent and the interaction between solvophilic blocks and the substrate. The morphological phase diagram of adsorbed vesicles is acquired. The influence of polymer adhesion strength and solvophobicity on the geometrical and mechanical properties of a SPB is systematically studied as well. It is found that vesicular disruption is easily triggered for strong adhesion strength. Moreover, for strong adhesion strength and weak solvophobicity, the fluctuation of membrane height is impeded while the area of fluctuation is enhanced.
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Affiliation(s)
- Yan-Ling Yang
- Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan 106, Republic of China.
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12
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Klermund L, Poschenrieder ST, Castiglione K. Simple surface functionalization of polymersomes using non-antibacterial peptide anchors. J Nanobiotechnology 2016; 14:48. [PMID: 27334900 PMCID: PMC4918069 DOI: 10.1186/s12951-016-0205-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Accepted: 06/14/2016] [Indexed: 12/01/2022] Open
Abstract
Background Hollow vesicles formed from block copolymers, so-called polymersomes, have been extensively studied in the last decade for their various applications in drug delivery, in diagnostics and as nanoreactors. The immobilization of proteins on the polymersomes’ surface can aid in cell targeting, lead to functional biosensors or add an additional reaction space for multistep syntheses. In almost all surface functionalization strategies to date, a chemical pre-conjugation of the polymer with a reactive group or ligand and the functionalization of the protein are required. To avoid chemical pre-conjugation, we investigated the simple and quick functionalization of preformed poly(2-methyloxazoline)-poly(dimethylsiloxane)-poly(2-methyloxazoline) (PMOXA-PDMS-PMOXA) polymersomes through the spontaneous insertion of four hydrophobic, non-antibacterial peptide anchors into the membrane to display enhanced green fluorescent protein (eGFP) on the polymersomes’ surface. Results Three of the four hydrophobic peptides, the transmembrane domains of a eukaryotic cytochrome b5, of the viral lysis protein L and of the yeast syntaxin VAM3 could be recombinantly expressed as soluble eGFP-fusion proteins and spontaneously inserted into the polymeric membrane. Characterization of the surface functionalization revealed that peptide insertion was linearly dependent on the protein concentration and possible at a broad temperature range of 4–42 °C. Up to 2320 ± 280 eGFP molecules were immobilized on a single polymersome, which is in agreement with the calculated maximum loading capacity. The peptide insertion was stable without disrupting membrane integrity as shown in calcein leakage experiments and the functionalized polymersomes remained stable for at least 6 weeks. Conclusion The surface functionalization of polymersomes with hydrophilic proteins can be mediated by several peptide anchors in a spontaneous process at extremely mild insertion conditions and without the need of pre-conjugating polymers. Electronic supplementary material The online version of this article (doi:10.1186/s12951-016-0205-x) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Ludwig Klermund
- Institute of Biochemical Engineering, Technical University of Munich, Boltzmannstraße 15, 85748, Garching, Germany
| | - Sarah T Poschenrieder
- Institute of Biochemical Engineering, Technical University of Munich, Boltzmannstraße 15, 85748, Garching, Germany
| | - Kathrin Castiglione
- Institute of Biochemical Engineering, Technical University of Munich, Boltzmannstraße 15, 85748, Garching, Germany.
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13
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Zhao X, Zhang X, Liu HG. Composite PS-b-P4VP/Ag and PS-b-P4VP/Au thin films fabricated via a multilevel self-assembly process. RSC Adv 2016. [DOI: 10.1039/c6ra12435f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Thin composite films with microstructures doped with Ag or Au species were fabricated at the air/liquid interface, which exhibited effective catalytic activities for heterogeneous catalytic reactions.
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Affiliation(s)
- Xingjuan Zhao
- Key Laboratory for Colloid and Interface Chemistry of Education Ministry
- Shandong University
- Jinan 250100
- P. R. China
| | - Xiaokai Zhang
- College of Physics and Electronics
- Shandong Normal University
- Jinan 250014
- P. R. China
| | - Hong-Guo Liu
- Key Laboratory for Colloid and Interface Chemistry of Education Ministry
- Shandong University
- Jinan 250100
- P. R. China
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14
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Palivan CG, Goers R, Najer A, Zhang X, Car A, Meier W. Bioinspired polymer vesicles and membranes for biological and medical applications. Chem Soc Rev 2016; 45:377-411. [DOI: 10.1039/c5cs00569h] [Citation(s) in RCA: 413] [Impact Index Per Article: 51.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Biological membranes play an essential role in living organisms by providing stable and functional compartments, supporting signalling and selective transport. Combining synthetic polymer membranes with biological molecules promises to be an effective strategy to mimic the functions of cell membranes and apply them in artificial systems.
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Affiliation(s)
| | - Roland Goers
- Department of Chemistry
- University of Basel
- CH-4056 Basel
- Switzerland
- Department of Biosystems Science and Engineering
| | - Adrian Najer
- Department of Chemistry
- University of Basel
- CH-4056 Basel
- Switzerland
| | - Xiaoyan Zhang
- Department of Chemistry
- University of Basel
- CH-4056 Basel
- Switzerland
| | - Anja Car
- Department of Chemistry
- University of Basel
- CH-4056 Basel
- Switzerland
| | - Wolfgang Meier
- Department of Chemistry
- University of Basel
- CH-4056 Basel
- Switzerland
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15
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Habel J, Hansen M, Kynde S, Larsen N, Midtgaard SR, Jensen GV, Bomholt J, Ogbonna A, Almdal K, Schulz A, Hélix-Nielsen C. Aquaporin-Based Biomimetic Polymeric Membranes: Approaches and Challenges. MEMBRANES 2015; 5:307-51. [PMID: 26264033 PMCID: PMC4584284 DOI: 10.3390/membranes5030307] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Accepted: 07/22/2015] [Indexed: 12/12/2022]
Abstract
In recent years, aquaporin biomimetic membranes (ABMs) for water separation have gained considerable interest. Although the first ABMs are commercially available, there are still many challenges associated with further ABM development. Here, we discuss the interplay of the main components of ABMs: aquaporin proteins (AQPs), block copolymers for AQP reconstitution, and polymer-based supporting structures. First, we briefly cover challenges and review recent developments in understanding the interplay between AQP and block copolymers. Second, we review some experimental characterization methods for investigating AQP incorporation including freeze-fracture transmission electron microscopy, fluorescence correlation spectroscopy, stopped-flow light scattering, and small-angle X-ray scattering. Third, we focus on recent efforts in embedding reconstituted AQPs in membrane designs that are based on conventional thin film interfacial polymerization techniques. Finally, we describe some new developments in interfacial polymerization using polyhedral oligomeric silsesquioxane cages for increasing the physical and chemical durability of thin film composite membranes.
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Affiliation(s)
- Joachim Habel
- Technical University of Denmark, Department of Environmental Engineering, Miljøvej, Building 113, 2800 Kgs. Lyngby, Denmark.
- Aquaporin A/S, Ole Maaløes Vej 3, 2200 Copenhagen, Denmark.
| | - Michael Hansen
- University of Copenhagen, Department of Plant and Environmental Sciences, Thorvaldsensvej 40, 1871 Frederiksberg, Denmark.
| | - Søren Kynde
- University of Copenhagen, Copenhagen Biocenter, Ole Maaløes Vej 5, 2200 Copenhagen, Denmark.
| | - Nanna Larsen
- University of Copenhagen, Niels Bohr Institute, Hans Christian Ørsted building D, Universitetsparken, 5, 2100 Copenhagen, Denmark.
| | - Søren Roi Midtgaard
- University of Copenhagen, Copenhagen Biocenter, Ole Maaløes Vej 5, 2200 Copenhagen, Denmark.
| | | | - Julie Bomholt
- Aquaporin A/S, Ole Maaløes Vej 3, 2200 Copenhagen, Denmark.
| | - Anayo Ogbonna
- Aquaporin A/S, Ole Maaløes Vej 3, 2200 Copenhagen, Denmark.
| | - Kristoffer Almdal
- Technical University of Denmark, Department of Micro- and Nanotechnology, Produktionstorvet, Building 423, 2800 Kgs. Lyngby.
| | - Alexander Schulz
- University of Copenhagen, Department of Plant and Environmental Sciences, Thorvaldsensvej 40, 1871 Frederiksberg, Denmark.
| | - Claus Hélix-Nielsen
- Technical University of Denmark, Department of Environmental Engineering, Miljøvej, Building 113, 2800 Kgs. Lyngby, Denmark.
- Aquaporin A/S, Ole Maaløes Vej 3, 2200 Copenhagen, Denmark.
- University of Maribor, Laboratory for Water Biophysics and Membrane Processes, Faculty of Chemistry and Chemical Engineering, Smetanova ulica 17, 2000 Maribor, Slovenia.
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16
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Kowal J, Wu D, Mikhalevich V, Palivan CG, Meier W. Hybrid polymer-lipid films as platforms for directed membrane protein insertion. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:4868-4877. [PMID: 25849126 DOI: 10.1021/acs.langmuir.5b00388] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Hybrids composed of amphiphilic block copolymers and lipids constitute a new generation of biological membrane-inspired materials. Hybrid membranes resulting from self-assembly of lipids and polymers represent adjustable models for interactions between artificial and natural membranes, which are of key importance, e.g., when developing systems for drug delivery. By combining poly(dimethylsiloxane)-block-poly(2-methyl-2-oxazoline) amphiphilic copolymers (PDMS-b-PMOXA) with various phospholipids, we obtained hybrid films with modulated properties and topology, based on phase separation, and the formation of distinct domains. By understanding the factors driving the phase separation in these hybrid lipid-polymer films, we were able to use them as platforms for directed insertion of membrane proteins. Tuning the composition of the polymer-lipids mixtures favored successful insertion of membrane proteins with desired topological distributions (in polymer or/and lipid regions). Controlled insertion and location of membrane proteins in hybrid films make these hybrids ideal candidates for numerous applications where specific spatial functionality is required.
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Affiliation(s)
- Justyna Kowal
- Chemistry Department, University of Basel, Klingelbergstrasse 80, 4056 Basel, Switzerland
| | - Dalin Wu
- Chemistry Department, University of Basel, Klingelbergstrasse 80, 4056 Basel, Switzerland
| | - Viktoria Mikhalevich
- Chemistry Department, University of Basel, Klingelbergstrasse 80, 4056 Basel, Switzerland
| | - Cornelia G Palivan
- Chemistry Department, University of Basel, Klingelbergstrasse 80, 4056 Basel, Switzerland
| | - Wolfgang Meier
- Chemistry Department, University of Basel, Klingelbergstrasse 80, 4056 Basel, Switzerland
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17
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Draghici C, Kowal J, Darjan A, Meier W, Palivan CG. "Active surfaces" formed by immobilization of enzymes on solid-supported polymer membranes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:11660-11669. [PMID: 25207981 DOI: 10.1021/la502841p] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In various domains ranging from catalysis to medical and environmental sciences, there is currently much focus on the design of surfaces that present active compounds at the interface with their environments. Here, we describe the design of "active surfaces" based on solid-supported monolayers of asymmetric triblock copolymers, which serve as templates for the attachment of enzymes. A group of poly(ethylene glycol)-block-poly(γ-methyl-ε-caprolactone)-block-poly[(2-dimethylamino) ethyl methacrylate] amphiphilic copolymers, with different hydrophilic and hydrophobic domains (PEG45-b-PMCLx-b-PDMAEMAy) was selected to generate solid-supported polymer membranes. The behavior of the copolymers in terms of their molecular arrangements at the air-water interface was established by a combination of Langmuir isotherms and Brewster angle microscopy. Uniform thin layers of copolymers were obtained by transferring films onto silica solid supports at optimal surface pressure. These solid-supported polymer membranes were characterized by assessing various properties, such as monolayer thickness, hydrophilic/hydrophobic balance, topography, and roughness. Laccase, used as an enzyme model, was successfully attached to copolymer membranes by stable interactions as followed by quartz crystal microbalance with dissipation measurements, and its activity was preserved, as indicated by activity assays. The interaction between the amphiphilic triblock copolymer films and immobilized enzymes represents a straightforward approach to engineer "active surfaces", with biomolecules playing the active role by their intrinsic bioactivity.
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Affiliation(s)
- Camelia Draghici
- Chemistry Department, University of Basel , Klingelbergstrasse 80, 4056 Basel, Switzerland
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18
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Kowal JŁ, Kowal JK, Wu D, Stahlberg H, Palivan CG, Meier WP. Functional surface engineering by nucleotide-modulated potassium channel insertion into polymer membranes attached to solid supports. Biomaterials 2014; 35:7286-94. [PMID: 24912817 DOI: 10.1016/j.biomaterials.2014.05.043] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Accepted: 05/16/2014] [Indexed: 01/04/2023]
Abstract
Planar solid-supported membranes based on amphiphilic block copolymers represent promising systems for the artificial creation of structural surfaces. Here we introduce a method for engineering functional planar solid-supported membranes through insertion of active biomolecules. We show that membranes based on poly(dimethylsiloxane)-block-poly(2-methyl-2-oxazoline) (PDMS-b-PMOXA) amphiphilic diblock copolymers, which mimic natural membranes, are suitable for hosting biomolecules. Our strategy allows preparation of large-area, well-ordered polymer bilayers via Langmuir-Blodgett and Langmuir-Schaefer transfers, and insertion of biomolecules by using Bio-Beads. We demonstrate that a model membrane protein, the potassium channel from the bacterium Mesorhizobium loti, remains functional after insertion into the planar solid-supported polymer membrane. This approach can be easily extended to generate a platform of functional solid-supported membranes by insertion of different hydrophobic biomolecules, and employing different types of solid substrates for desired applications.
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Affiliation(s)
- Justyna Ł Kowal
- Chemistry Department, University of Basel, Klingelbergstrasse 80, 4056 Basel, Switzerland
| | - Julia K Kowal
- Center for Cellular Imaging and NanoAnalytics (C-CINA), Biozentrum, University of Basel, Mattenstrasse 26, 4058 Basel, Switzerland
| | - Dalin Wu
- Chemistry Department, University of Basel, Klingelbergstrasse 80, 4056 Basel, Switzerland
| | - Henning Stahlberg
- Center for Cellular Imaging and NanoAnalytics (C-CINA), Biozentrum, University of Basel, Mattenstrasse 26, 4058 Basel, Switzerland
| | - Cornelia G Palivan
- Chemistry Department, University of Basel, Klingelbergstrasse 80, 4056 Basel, Switzerland
| | - Wolfgang P Meier
- Chemistry Department, University of Basel, Klingelbergstrasse 80, 4056 Basel, Switzerland.
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Kowal J, Zhang X, Dinu IA, Palivan CG, Meier W. Planar Biomimetic Membranes Based on Amphiphilic Block Copolymers. ACS Macro Lett 2013. [DOI: 10.1021/mz400590c] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Justyna Kowal
- Chemistry Department, University of Basel, Klingelbergstrasse 80, CH-4056 Basel, Switzerland
| | - Xiaoyan Zhang
- Chemistry Department, University of Basel, Klingelbergstrasse 80, CH-4056 Basel, Switzerland
| | - Ionel Adrian Dinu
- Chemistry Department, University of Basel, Klingelbergstrasse 80, CH-4056 Basel, Switzerland
| | - Cornelia G. Palivan
- Chemistry Department, University of Basel, Klingelbergstrasse 80, CH-4056 Basel, Switzerland
| | - Wolfgang Meier
- Chemistry Department, University of Basel, Klingelbergstrasse 80, CH-4056 Basel, Switzerland
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20
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Li S, Guo J, Patel RA, Dadlani AL, Leblanc RM. Interaction between graphene oxide and Pluronic F127 at the air-water interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:5742-5748. [PMID: 23635085 DOI: 10.1021/la401056t] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Triblock copolymer Pluronic F127 (PF127) has previously been demonstrated to disperse graphene oxide (GO) in electrolyte solution and block the hydrophobic interaction between GO and l-tryptophan and l-tyrosine. However, the nature of this interaction between PF127 and GO remains to be characterized and elucidated. In the present study, we aimed to characterize and understand the interaction between GO and PF127 using a 2-dimensional Langmuir monolayer methodology at the air-water interface by surface pressure-area isotherm measurement, stability, adsorption, and atomic force microscopy (AFM) imaging. Based on the observation of surface pressure-area isotherms, adsorption, and stability of PF127 and PF127/GO mixture at the air-water interface, GO is suggested to change the conformation of PF127 at the air-water interface and also drag PF127 from the interface to the bulk subphase. Atomic force microscopy (AFM) image supports this assumption, as GO and PF127 can be observed by spreading the subphase solution outside the compressing barriers, as shown in the TOC graphic.
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Affiliation(s)
- Shanghao Li
- Department of Chemistry, University of Miami, Coral Gables, Florida 33146, United States
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21
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Zhang X, Fu W, Palivan CG, Meier W. Natural channel protein inserts and functions in a completely artificial, solid-supported bilayer membrane. Sci Rep 2013; 3:2196. [PMID: 23846807 PMCID: PMC3709162 DOI: 10.1038/srep02196] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2013] [Accepted: 06/27/2013] [Indexed: 11/09/2022] Open
Abstract
Reconstitution of membrane proteins in artificial membrane systems creates a platform for exploring their potential for pharmacological or biotechnological applications. Previously, we demonstrated amphiphilic block copolymers as promising building blocks for artificial membranes with long-term stability and tailorable structural parameters. However, the insertion of membrane proteins has not previously been realized in a large-area, stable, and solid-supported artificial membrane. Here, we show the first, preliminary model of a channel membrane protein that is functionally incorporated in a completely artificial polymer, tethered, solid-supported bilayer membrane (TSSBM). Unprecedented ionic transport characteristics that differ from previous results on protein insertion into planar, free-standing membranes, are identified. Our findings mark a change in understanding protein insertion and ion flow within natural channel proteins when inserted in an artificial TSSBM, thus holding great potential for numerous applications such as drug screening, trace analyzing, and biosensing.
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Affiliation(s)
- Xiaoyan Zhang
- Department of Chemistry, University of Basel, Klingelbergstrasse 80, Basel 4056, Switzerland
| | - Wangyang Fu
- Department of Physics, University of Basel, Klingelbergstrasse 82, Basel 4056, Switzerland
| | - Cornelia G. Palivan
- Department of Chemistry, University of Basel, Klingelbergstrasse 80, Basel 4056, Switzerland
| | - Wolfgang Meier
- Department of Chemistry, University of Basel, Klingelbergstrasse 80, Basel 4056, Switzerland
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22
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Direct visualization of the alamethicin pore formed in a planar phospholipid matrix. Proc Natl Acad Sci U S A 2012; 109:21223-7. [PMID: 23236158 DOI: 10.1073/pnas.1201559110] [Citation(s) in RCA: 77] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
We present direct visualization of pores formed by alamethicin (Alm) in a matrix of phospholipids using electrochemical scanning tunneling microscopy (EC-STM). High-resolution EC-STM images show individual peptide molecules forming channels. The channels are not dispersed randomly in the monolayer but agglomerate forming 2D nanocrystals with a hexagonal lattice in which the average channel-channel distance is 1.90 ± 0.1 nm. The STM images suggest that each Alm is shared between the two adjacent channels. Every channel consists of six Alm molecules. Three or four of these molecules have the hydrophilic group oriented toward the center of the channel allowing for water column formation inside the channel. The dimensions of the central pore in the images are consistent with the dimension of the water column in a model of hexameric pore proposed in the literature. The images obtained in this work validate the barrel-stave model of the pore formed in phospholipid membranes by amphiphatic peptides. They also provide direct evidence for cluster formation by such pores.
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23
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Jagoda A, Zinn M, Meier W, Kita-Tokarczyk K. Head Group Influence on Lipid Interactions With a Polyhydroxyalkanoate Biopolymer. MACROMOL CHEM PHYS 2012. [DOI: 10.1002/macp.201200232] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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24
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Zhang X, Tanner P, Graff A, Palivan CG, Meier W. Mimicking the cell membrane with block copolymer membranes. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/pola.26000] [Citation(s) in RCA: 104] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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25
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26
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Syringeable Pluronic–α-cyclodextrin supramolecular gels for sustained delivery of vancomycin. Eur J Pharm Biopharm 2012; 80:103-12. [DOI: 10.1016/j.ejpb.2011.09.017] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2011] [Revised: 09/27/2011] [Accepted: 09/30/2011] [Indexed: 02/03/2023]
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27
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Noor M, Dworeck T, Schenk A, Shinde P, Fioroni M, Schwaneberg U. Polymersome surface decoration by an EGFP fusion protein employing Cecropin A as peptide "anchor". J Biotechnol 2011; 157:31-7. [PMID: 22041056 DOI: 10.1016/j.jbiotec.2011.10.005] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2011] [Revised: 08/19/2011] [Accepted: 10/14/2011] [Indexed: 11/16/2022]
Abstract
Polymer based nanocompartments have potential applications in synthetic biology, medicine (drug release) and industrial biotechnology (chiral nanoreactors, multistep syntheses, selective product recovery). A step towards the aforementioned goals is the polymer membrane functionalization through covalent bonding of chemical anchors or insertion of proteins/peptides, to obtain specific properties like recognition, catalytic activity and facilitated diffusion, mimicking the complexity of a biological membrane. The use of genetic engineering techniques widens the possible applications of peptides and proteins specifically designed for polymer membrane interactions. A fusion protein (CecEGFP) based on the antibacterial peptide Cecropin A and the EGFP (Enhanced Green Fluorescent Protein) was designed, expressed and biophysically characterized. CecEGFP interaction with the tri-block copolymer PIB-PEG-PIB (PIB=polyisobutylene, PEG=polyethylene glycol) based polymersome membrane was analyzed by circular dichroism as well as EGFP and Trp fluorescence measurements. Results proved that Cecropin A is usable as a "membrane surface anchor" for water soluble proteins, as it inserts into the polymer membrane. The aim and novelty of this study is within the design of fusion proteins specifically developed for polymer membrane interactions. The use of amphiphilic Cecropin A "anchoring" water soluble proteins to the polymersome surface, avoids chemical coupling between polymers and proteins.
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Affiliation(s)
- Muhammad Noor
- Department of Biotechnology (Biology VI), RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany
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28
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Dorn J, Belegrinou S, Kreiter M, Sinner EK, Meier W. Planar Block Copolymer Membranes by Vesicle Spreading. Macromol Biosci 2011; 11:514-25. [DOI: 10.1002/mabi.201000396] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2010] [Revised: 11/16/2010] [Indexed: 11/06/2022]
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29
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Bio-Decorated Polymer Membranes: A New Approach in Diagnostics and Therapeutics. Polymers (Basel) 2011. [DOI: 10.3390/polym3010173] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
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30
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Broniatowski M, Vila-Romeu N, Dynarowicz-Łątka P. Fluorinated vs hydrogenated surfactants in mixtures with valinomycin—The Langmuir monolayer study. Colloids Surf B Biointerfaces 2010; 77:298-300. [DOI: 10.1016/j.colsurfb.2010.01.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2009] [Revised: 01/14/2010] [Accepted: 01/28/2010] [Indexed: 11/16/2022]
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31
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Theogarajan L, Li H, Busse K, Desai S, Kressler J, Scholz C. Self-assembly of ABA triblock copolymers based on functionalized polydimethylsiloxane and polymethyloxazoline. POLYM INT 2010. [DOI: 10.1002/pi.2849] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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32
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Scheibe P, Barz M, Hemmelmann M, Zentel R. Langmuir-Blodgett films of biocompatible poly(HPMA)-block-poly(lauryl methacrylate) and poly(HPMA)-random-poly(lauryl methacrylate): influence of polymer structure on membrane formation and stability. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:5661-5669. [PMID: 20345113 DOI: 10.1021/la903725k] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Membranes based on functional biocompatible polymers can be regarded as a useful model system to study biological interactions, e.g. antibody-antigen interactions or protein polymer interactions. These model systems may give a better insight into these processes and may help to find suitable polymeric structures offering biocompatibility as well as reduced polymer protein interaction. In this respect, Langmuir-Blodgett (LB) layer formation at the air/water (A/W) interface is studied in respect to polymer architecture in this article. For this purpose, narrowly distributed N-(2-hydroxypropyl)-methacrylamide (HPMA) random and block copolymers have been prepared by the RAFT polymerization method. For random copolymers different molecular weights were prepared. As for the block copolymers also the ratio of hydrophilic and hydrophobic units was varied in order to study the influence of hydrophobic block length on collapse pressure and area. The molecular weights of all polymers were around 15 kDa and 30 kDa. In the case of block copolymers we found a direct correlation of the length of the hydrophobic block to the collapse area. Furthermore, hysteresis experiments clearly point out that block copolymers form stable LB layers. No remarkable changes in collapse pressure or area could be observed. In contrast the area occupied by random copolymers changes at each hysteresis cycle indicating a loss of polymer to the aqueous subphase. In addition the LB layers were transferred onto mica substrates. The block copolymers formed stable and defect free membranes over an area of 100 microm(2) with a roughness (rms) 1.3-1.4 A. On the contrary, membranes based on random copolymers turned out to have a higher surface roughness. Our findings clearly underline the influence of polymer structure on the LB layer formation at the A/W interface.
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Affiliation(s)
- Patrick Scheibe
- Institute of Organic Chemistry, Johannes Gutenberg-University Mainz, Duesbergweg 10-14, 55099 Mainz, Germany
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33
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34
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Kita-Tokarczyk K, Itel F, Grzelakowski M, Egli S, Rossbach P, Meier W. Monolayer interactions between lipids and amphiphilic block copolymers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:9847-9856. [PMID: 19705885 DOI: 10.1021/la900948a] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Interactions in binary mixed monolayers from lipids 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) and 1,2-dioleoyl-sn-glycero-3-phosphocholine (DOPC) and amphiphilic poly(2-methyloxazoline)-block-poly(dimethylsiloxane)-block-poly(2-methyloxazoline) block copolymers were studied by using the Langmuir balance technique and Brewster angle microscopy. It is shown that monolayers from the saturated lipid (DPPC) are more sensitive to the presence of polymers in the film, resulting in phase separation and the formation of pure lipid domains at high surface pressure. The morphology and composition of such phase-separated lipid-polymer films were studied by fluorescence microscopy and ToF-SIMS. In contrast, in DOPC-containing monolayers, the polymers tend to phase-separate at low surface pressures only and homogeneous films are obtained upon further compression, due to higher lipid fluidity. The analysis of excess energy of mixing shows that while the separation effect in densely packed DPPC-containing films is strongly dependent on the polymer size (with the larger polymer having a much stronger influence), in the case of monolayers with DOPC much smaller effects are observed. The results are discussed in terms of the monolayer composition, lipid fluidity, and polymer size.
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35
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Kouzayha A, Nasir MN, Buchet R, Wattraint O, Sarazin C, Besson F. Conformational and Interfacial Analyses of K3A18K3 and Alamethicin in Model Membranes. J Phys Chem B 2009; 113:7012-9. [DOI: 10.1021/jp810539b] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Achraf Kouzayha
- Université de Lyon, Université Lyon 1, INSA de Lyon, and ICBMS CNRS UMR 5246, Villeurbanne, F-69622, France, CPE Lyon, Villeurbanne, F-69616, France, and Unité de Génie Enzymatique et Cellulaire, UMR 6022 du CNRS—Université de Picardie Jules Verne, Amiens, France
| | - Mehmet N. Nasir
- Université de Lyon, Université Lyon 1, INSA de Lyon, and ICBMS CNRS UMR 5246, Villeurbanne, F-69622, France, CPE Lyon, Villeurbanne, F-69616, France, and Unité de Génie Enzymatique et Cellulaire, UMR 6022 du CNRS—Université de Picardie Jules Verne, Amiens, France
| | - René Buchet
- Université de Lyon, Université Lyon 1, INSA de Lyon, and ICBMS CNRS UMR 5246, Villeurbanne, F-69622, France, CPE Lyon, Villeurbanne, F-69616, France, and Unité de Génie Enzymatique et Cellulaire, UMR 6022 du CNRS—Université de Picardie Jules Verne, Amiens, France
| | - Olivier Wattraint
- Université de Lyon, Université Lyon 1, INSA de Lyon, and ICBMS CNRS UMR 5246, Villeurbanne, F-69622, France, CPE Lyon, Villeurbanne, F-69616, France, and Unité de Génie Enzymatique et Cellulaire, UMR 6022 du CNRS—Université de Picardie Jules Verne, Amiens, France
| | - Catherine Sarazin
- Université de Lyon, Université Lyon 1, INSA de Lyon, and ICBMS CNRS UMR 5246, Villeurbanne, F-69622, France, CPE Lyon, Villeurbanne, F-69616, France, and Unité de Génie Enzymatique et Cellulaire, UMR 6022 du CNRS—Université de Picardie Jules Verne, Amiens, France
| | - Françoise Besson
- Université de Lyon, Université Lyon 1, INSA de Lyon, and ICBMS CNRS UMR 5246, Villeurbanne, F-69622, France, CPE Lyon, Villeurbanne, F-69616, France, and Unité de Génie Enzymatique et Cellulaire, UMR 6022 du CNRS—Université de Picardie Jules Verne, Amiens, France
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36
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Nogueiras-Nieto L, Alvarez-Lorenzo C, Sandez-Macho I, Concheiro A, Otero-Espinar FJ. Hydrosoluble Cyclodextrin/Poloxamer Polypseudorotaxanes at the Air/Water Interface, in Bulk Solution, and in the Gel State. J Phys Chem B 2009; 113:2773-82. [DOI: 10.1021/jp809806w] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Luis Nogueiras-Nieto
- Departamento de Farmacia y Tecnologia Farmaceutica and Departamento de Quimica Fisica, Universidad de Santiago de Compostela, 15782-Santiago de Compostela, Spain
| | - Carmen Alvarez-Lorenzo
- Departamento de Farmacia y Tecnologia Farmaceutica and Departamento de Quimica Fisica, Universidad de Santiago de Compostela, 15782-Santiago de Compostela, Spain
| | - Isabel Sandez-Macho
- Departamento de Farmacia y Tecnologia Farmaceutica and Departamento de Quimica Fisica, Universidad de Santiago de Compostela, 15782-Santiago de Compostela, Spain
| | - Angel Concheiro
- Departamento de Farmacia y Tecnologia Farmaceutica and Departamento de Quimica Fisica, Universidad de Santiago de Compostela, 15782-Santiago de Compostela, Spain
| | - Francisco J. Otero-Espinar
- Departamento de Farmacia y Tecnologia Farmaceutica and Departamento de Quimica Fisica, Universidad de Santiago de Compostela, 15782-Santiago de Compostela, Spain
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37
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38
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Gonzalez-Lopez J, Alvarez-Lorenzo C, Taboada P, Sosnik A, Sandez-Macho I, Concheiro A. Self-associative behavior and drug-solubilizing ability of poloxamine (tetronic) block copolymers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:10688-10697. [PMID: 18785722 DOI: 10.1021/la8016563] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The incidence of the structural features on the self-assembly of different poloxamines (the conventional sequential Tetronic 304, 901, 904, 908, 1107, 1301, and 1307; a reverse-sequential counterpart Tetronic 150R1; and a chemically modified derivative, N-methylated Tetronic 1107) was thoroughly studied in 10 mM HCl by means of pi-A isotherm, surface tension, and pyrene fluorescence measurements. The size and size distribution of the aggregates were investigated by dynamic and static light scattering, and the morphology was probed by transmission electron microscopy. The abilities of the different derivatives to solubilize the drug simvastatin were also evaluated. Poloxamines with both higher PO/EO ratio and molecular weight (T1301 and T150R1) led to micelles with larger and more hydrophobic cores, particularly adequate for hosting hydrophobic molecules and protecting the labile lactone form of simvastatin from hydrolysis. On the other hand, the hydroxy acid form of simvastatin interacted with the central ethylenediamine group under alkaline pH (T304) or when a permanent positive charge due to methylation was present. Micelles of long poloxamine molecules containing large PPO blocks (with 23-29 units, namely, T1301, T1307, and T150R1), particularly the one that also has long PEO blocks, were the most physically stable toward dilution.
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Affiliation(s)
- Jaime Gonzalez-Lopez
- Departamento de Quimica Fisica, Universidad de Santiago de Compostela, 15782-Santiago de Compostela, Spain
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39
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Broniatowski M, Vila-Romeu N, Dynarowicz-Łatka P. Two-Dimensional Miscibility Studies of Alamethicin and Selected Film-Forming Molecules. J Phys Chem B 2008; 112:7762-70. [DOI: 10.1021/jp800234k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Marcin Broniatowski
- Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Kraków, Poland, and Faculty of Sciences, Department of Physical Chemistry, University of Vigo, Campus Ourense, As Lagoas s/n, 32004 Ourense, Spain
| | - Nuria Vila-Romeu
- Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Kraków, Poland, and Faculty of Sciences, Department of Physical Chemistry, University of Vigo, Campus Ourense, As Lagoas s/n, 32004 Ourense, Spain
| | - Patrycja Dynarowicz-Łatka
- Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Kraków, Poland, and Faculty of Sciences, Department of Physical Chemistry, University of Vigo, Campus Ourense, As Lagoas s/n, 32004 Ourense, Spain
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40
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Broniatowski M, Dynarowicz-Łatka P. Semifluorinated alkanes--primitive surfactants of fascinating properties. Adv Colloid Interface Sci 2008; 138:63-83. [PMID: 18082155 DOI: 10.1016/j.cis.2007.11.002] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2007] [Revised: 11/05/2007] [Accepted: 11/09/2007] [Indexed: 11/16/2022]
Abstract
Semifluorinated alkanes (SFAs) are diblock molecules, in which two mutually immiscible moieties, namely the hydrocarbon segment and the perfluorinated segment are bound covalently. The presence of two opposing segments within one molecule makes semifluorinated alkanes a very interesting class of compounds, which show a particular behavior both in bulk and at interfaces. Their highly asymmetric structure, arising from the incompatibility of the both constituent parts, results in surface activity of these molecules (so-called primitive surfactants) when dissolved in organic solvents, and allows for the Langmuir monolayer formation if spread at the air/water interface, despite of the absence of any polar group. Since 1984 (when SFAs have been characterized for the first time by Rabolt et al. [Rabolt JF, Russell TP, Twieg RJ. Macromolecules 1984;17:2786]), semifluorinated alkanes have been subjected to many studies. The present article reviews the results obtained so far and covers the aspects of their synthesis, properties in bulk (solutions and solid state) and applications. Special emphasis is put on the Langmuir monolayer properties and self-organization of SFAs on solid substrates.
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Affiliation(s)
- Marcin Broniatowski
- Jagiellonian University, Faculty of Chemistry, Ingardena 3, 30-060 Kraków, Poland.
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41
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Casse O, Colombani O, Kita-Tokarczyk K, Müller AHE, Meier W, Taubert A. Calcium phosphate mineralization beneath monolayers of poly(n-butylacrylate)–block–poly(acrylic acid) block copolymers. Faraday Discuss 2008; 139:179-97; discussion 213-28, 419-20. [DOI: 10.1039/b716353c] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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42
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Adams N, Schubert US. Poly(2-oxazolines) in biological and biomedical application contexts. Adv Drug Deliv Rev 2007; 59:1504-20. [PMID: 17904246 DOI: 10.1016/j.addr.2007.08.018] [Citation(s) in RCA: 356] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2007] [Accepted: 08/14/2007] [Indexed: 12/12/2022]
Abstract
Polyoxazolines of various architectures and chemical functionalities can be prepared in a living and therefore controlled manner via cationic ring-opening polymerisation. They have found widespread applications, ranging from coatings to pigment dispersants. Furthermore, several polyoxazolines are water-soluble or amphiphilic and relatively non-toxic, which makes them interesting as biomaterials. This paper reviews the development of polyoxazoline-based polymers in biological and biomedical application contexts since the beginning of the millennium. This includes nanoscalar systems such as membranes and nanoparticles, drug and gene delivery applications, as well as stimuli-responsive systems.
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Affiliation(s)
- Nico Adams
- Unilever Centre for Molecular Science Informatics, University Chemical Laboratory, University of Cambridge, Lensfield Road, Cambridge CB1 9SB, United Kingdom
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Huang TJ, Waldeisen JR. Biologically inspired energy: harnessing molecular functionality towards nanosystemic design. Nanomedicine (Lond) 2007; 1:369-72. [PMID: 17716169 DOI: 10.2217/17435889.1.3.369] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Evaluation of: Ho D, Chu B, Lee H, Montemagno CD: Protein-driven energy transduction across polymeric biomembranes. Nanotechnology 15(8), 1084–1094 (2004) [1] . This manuscript highlights the intersection of two rapidly advancing fields: molecular nanotechnology and alternative energy development. The functionalization of biomimetic membranes with the energy-transducing proteins bacteriorhodopsin and cytochrome c oxidase to form biologically active thin films is described. Following the fabrication and characterization of protein-embedded Langmuir–Blodgett films, these materials have been demonstrated to exhibit enhanced mechanical robustness over conventional, lipid-based materials, indicating a potential applicability towards device construction. In addition, these thin films have demonstrated the ability to use green light to generate proton gradients as well as photoelectric currents across these membrane thin films, which indicate their utility in preserving protein activity. We present the results and significance of this paper in its application of nonbiological materials to harness evolutionarily perfected biomolecular energetics.
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Affiliation(s)
- Tony Jun Huang
- Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA.
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Broniatowski M, Obidowicz K, Vila Romeu N, Broniatowska E, Dynarowicz-Łatka P. Mixed Langmuir monolayers of gramicidin A and fluorinated alcohols. J Colloid Interface Sci 2007; 313:600-7. [PMID: 17540396 DOI: 10.1016/j.jcis.2007.04.060] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2006] [Revised: 04/11/2007] [Accepted: 04/26/2007] [Indexed: 10/23/2022]
Abstract
Mixed monolayers of gramicidin A (GA) and three alcohols, differing in the degree of fluorination, namely C18OH, F18OH, and F8H10OH have been investigated by means of: surface manometry (pi-A isotherms) and Brewster angle microscopy (BAM) aiming at finding appropriate molecules for incorporating gramicidin A for a biosensor design. Our results proved that only the semifluorinated alcohol is appropriate material for this purpose since it forms miscible and homogeneous monolayers with GA within the whole concentration range. The experimental results have been supported by the calculations of van der Waals energy profiles using the Insight II program. Both the hydrogenated and perfluorinated alcohols were found to aggregate at higher surface pressures, which exclude their application for gramicidin-based biosensor construction.
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Affiliation(s)
- Marcin Broniatowski
- Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Kraków, Poland.
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