51
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Bieligmeyer M, Artukovic F, Nussberger S, Hirth T, Schiestel T, Müller M. Reconstitution of the membrane protein OmpF into biomimetic block copolymer-phospholipid hybrid membranes. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2016; 7:881-92. [PMID: 27547605 PMCID: PMC4979867 DOI: 10.3762/bjnano.7.80] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Accepted: 05/18/2016] [Indexed: 06/06/2023]
Abstract
Structure and function of many transmembrane proteins are affected by their environment. In this respect, reconstitution of a membrane protein into a biomimetic polymer membrane can alter its function. To overcome this problem we used membranes formed by poly(1,4-isoprene-block-ethylene oxide) block copolymers blended with 1,2-diphytanoyl-sn-glycero-3-phosphocholine. By reconstituting the outer membrane protein OmpF from Escherichia coli into these membranes, we demonstrate functionality of this protein in biomimetic lipopolymer membranes, independent of the molecular weight of the block copolymers. At low voltages, the channel conductance of OmpF in 1 M KCl was around 2.3 nS. In line with these experiments, integration of OmpF was also revealed by impedance spectroscopy. Our results indicate that blending synthetic polymer membranes with phospholipids allows for the reconstitution of transmembrane proteins under preservation of protein function, independent of the membrane thickness.
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Affiliation(s)
- Matthias Bieligmeyer
- Institute of Interfacial Process Engineering and Plasma Technology, Department of Chemical Interfacial Process Engineering, University of Stuttgart, Nobelstraße 12, 70569 Stuttgart, Germany
| | - Franjo Artukovic
- Institute of Biomaterials and Biomolecular Systems, Department of Biophysics, University of Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart, Germany
| | - Stephan Nussberger
- Institute of Biomaterials and Biomolecular Systems, Department of Biophysics, University of Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart, Germany
| | - Thomas Hirth
- Institute of Interfacial Process Engineering and Plasma Technology, Department of Chemical Interfacial Process Engineering, University of Stuttgart, Nobelstraße 12, 70569 Stuttgart, Germany
- Fraunhofer Institute for Interfacial Engineering and Biotechnology, Department of Interfacial Engineering and Materials Science, Nobelstraße 12, 70569 Stuttgart, Germany
| | - Thomas Schiestel
- Fraunhofer Institute for Interfacial Engineering and Biotechnology, Department of Interfacial Engineering and Materials Science, Nobelstraße 12, 70569 Stuttgart, Germany
| | - Michaela Müller
- Fraunhofer Institute for Interfacial Engineering and Biotechnology, Department of Interfacial Engineering and Materials Science, Nobelstraße 12, 70569 Stuttgart, Germany
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52
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Gonzalez-Perez A, Persson KM. Bioinspired Materials for Water Purification. MATERIALS (BASEL, SWITZERLAND) 2016; 9:E447. [PMID: 28773569 PMCID: PMC5456750 DOI: 10.3390/ma9060447] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2016] [Revised: 05/30/2016] [Accepted: 05/31/2016] [Indexed: 01/08/2023]
Abstract
Water scarcity issues associated with inadequate access to clean water and sanitation is a ubiquitous problem occurring globally. Addressing future challenges will require a combination of new technological development in water purification and environmental remediation technology with suitable conservation policies. In this scenario, new bioinspired materials will play a pivotal role in the development of more efficient and environmentally friendly solutions. The role of amphiphilic self-assembly on the fabrication of new biomimetic membranes for membrane separation like reverse osmosis is emphasized. Mesoporous support materials for semiconductor growth in the photocatalytic degradation of pollutants and new carriers for immobilization of bacteria in bioreactors are used in the removal and processing of different kind of water pollutants like heavy metals. Obstacles to improve and optimize the fabrication as well as a better understanding of their performance in small-scale and pilot purification systems need to be addressed. However, it is expected that these new biomimetic materials will find their way into the current water purification technologies to improve their purification/removal performance in a cost-effective and environmentally friendly way.
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Affiliation(s)
- Alfredo Gonzalez-Perez
- South Sweden Water Supply (Sydvatten AB), Skeppsgatan 19, Malmö SE-21119, Sweden.
- Sweden Water Research AB, Ideon Science Park, Scheelevägen 15, Lund SE-22370, Sweden.
- Membrane Biophysics, Niels Bohr Institute, Blegdamsvej 17, Copenhagen 2100, Denmark.
| | - Kenneth M Persson
- South Sweden Water Supply (Sydvatten AB), Skeppsgatan 19, Malmö SE-21119, Sweden.
- Sweden Water Research AB, Ideon Science Park, Scheelevägen 15, Lund SE-22370, Sweden.
- Department of Water Resources Engineering, Lund University, P.O. Box 118, Lund SE-22100, Sweden.
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53
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Petit J, Polenz I, Baret JC, Herminghaus S, Bäumchen O. Vesicles-on-a-chip: A universal microfluidic platform for the assembly of liposomes and polymersomes. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2016; 39:59. [PMID: 27286954 DOI: 10.1140/epje/i2016-16059-8] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Revised: 04/28/2016] [Accepted: 05/04/2016] [Indexed: 05/08/2023]
Abstract
In this study, we present a PDMS-based microfluidic platform for the fabrication of both liposomes and polymersomes. Based on a double-emulsion template formed in flow-focusing configuration, monodisperse liposomes and polymersomes are produced in a controlled manner after solvent extraction. Both types of vesicles can be formed from the exact same combination of fluids and are stable for at least three months under ambient storage conditions. By tuning the flow rates of the different fluid phases in the flow-focusing microfluidic design, the size of the liposomes and polymersomes can be varied over at least one order of magnitude. This method offers a versatile tool for future studies, e.g., involving the encapsulation of biological agents and the functionalization of artificial cell membranes, and might also be applicable for the controlled fabrication of hybrid vesicles.
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Affiliation(s)
- Julien Petit
- Max Planck Institute for Dynamics and Self-Organization (MPIDS), Am Fassberg 17, 37077, Göttingen, Germany
| | - Ingmar Polenz
- Max Planck Institute for Dynamics and Self-Organization (MPIDS), Am Fassberg 17, 37077, Göttingen, Germany
| | - Jean-Christophe Baret
- CNRS, Univ. Bordeaux, CRPP, UPR8641, 115 Avenue Dr. Schweitzer, 33600, Pessac, France
| | - Stephan Herminghaus
- Max Planck Institute for Dynamics and Self-Organization (MPIDS), Am Fassberg 17, 37077, Göttingen, Germany
| | - Oliver Bäumchen
- Max Planck Institute for Dynamics and Self-Organization (MPIDS), Am Fassberg 17, 37077, Göttingen, Germany.
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54
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Chawla U, Jiang Y, Zheng W, Kuang L, Perera SMDC, Pitman MC, Brown MF, Liang H. A Usual G-Protein-Coupled Receptor in Unusual Membranes. Angew Chem Int Ed Engl 2016; 55:588-92. [PMID: 26633591 PMCID: PMC5233722 DOI: 10.1002/anie.201508648] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Revised: 11/02/2015] [Indexed: 12/30/2022]
Abstract
G-protein-coupled receptors (GPCRs) are the largest family of membrane-bound receptors and constitute about 50% of all known drug targets. They offer great potential for membrane protein nanotechnologies. We report here a charge-interaction-directed reconstitution mechanism that induces spontaneous insertion of bovine rhodopsin, the eukaryotic GPCR, into both lipid- and polymer-based artificial membranes. We reveal a new allosteric mode of rhodopsin activation incurred by the non-biological membranes: the cationic membrane drives a transition from the inactive MI to the activated MII state in the absence of high [H(+)] or negative spontaneous curvature. We attribute this activation to the attractive charge interaction between the membrane surface and the deprotonated Glu134 residue of the rhodopsin-conserved ERY sequence motif that helps break the cytoplasmic "ionic lock". This study unveils a novel design concept of non-biological membranes to reconstitute and harness GPCR functions in synthetic systems.
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Affiliation(s)
- Udeep Chawla
- Department of Chemistry & Biochemistry, Department of Physics University of Arizona, Tucson, AZ 85721 (USA)
| | - Yunjiang Jiang
- Department of Metallurgical & Materials Engineering, Colorado School of Mines, Golden, CO 80401 (USA)
- Current address: Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, Texas Tech, University Health Science Center, Lubbock, TX 79430 (USA)
| | - Wan Zheng
- Department of Metallurgical & Materials Engineering, Colorado School of Mines, Golden, CO 80401 (USA)
| | - Liangju Kuang
- Department of Metallurgical & Materials Engineering, Colorado School of Mines, Golden, CO 80401 (USA)
| | - Suchithranga M D C Perera
- Department of Chemistry & Biochemistry, Department of Physics University of Arizona, Tucson, AZ 85721 (USA)
| | - Michael C Pitman
- Department of Chemistry & Biochemistry, Department of Physics University of Arizona, Tucson, AZ 85721 (USA)
| | - Michael F Brown
- Department of Chemistry & Biochemistry, Department of Physics University of Arizona, Tucson, AZ 85721 (USA).
| | - Hongjun Liang
- Department of Metallurgical & Materials Engineering, Colorado School of Mines, Golden, CO 80401 (USA).
- Current address: Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, Texas Tech, University Health Science Center, Lubbock, TX 79430 (USA).
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55
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He W, Ma J, Shu X, Qian J, Hua D. Reconstitution of bacteriorhodopsin with cationic poly(dimethylaminoethyl acrylate)-block-poly(methylacrylate) for bio-hybrid materials. RSC Adv 2016. [DOI: 10.1039/c5ra21680j] [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
A kind of cationic amphiphilic copolymer was synthesized for supporting membrane proteins to prepare bio-hybrid materials.
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Affiliation(s)
- Weiwei He
- School of Radiological and Interdisciplinary Sciences (RAD-X)
- Soochow University
- Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions
- Suzhou 215123
- China
| | - Jiaqi Ma
- College of Chemistry
- Chemical Engineering and Materials Science
- Suzhou 215123
- China
| | - Xiaowen Shu
- School of Radiological and Interdisciplinary Sciences (RAD-X)
- Soochow University
- Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions
- Suzhou 215123
- China
| | - Jun Qian
- College of Chemistry
- Chemical Engineering and Materials Science
- Suzhou 215123
- China
| | - Daoben Hua
- School of Radiological and Interdisciplinary Sciences (RAD-X)
- Soochow University
- Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions
- Suzhou 215123
- China
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56
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Xu G, Zhou H, Li J, Yin L, Zheng Z, Ding X. Autonomous fluorescence regulation in responsive polymer systems driven by a chemical oscillating reaction. Polym Chem 2016. [DOI: 10.1039/c6py00510a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A new autonomous luminescence-regulated mechanism in responsive polymer systems based on autonomous structure change driven by a chemical oscillating reaction.
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Affiliation(s)
- Guohe Xu
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu 610041
- P. R. China
- University of the Chinese Academy of Sciences (CAS)
| | - Hongwei Zhou
- School of Materials and Chemical Engineering
- Xi'an Technological University
- Xi'an 710032
- P. R. China
| | - Jie Li
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu 610041
- P. R. China
- University of the Chinese Academy of Sciences (CAS)
| | - Lv Yin
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu 610041
- P. R. China
| | - Zhaohui Zheng
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu 610041
- P. R. China
| | - Xiaobin Ding
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu 610041
- P. R. China
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57
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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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58
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Chawla U, Jiang Y, Zheng W, Kuang L, Perera SMDC, Pitman MC, Brown MF, Liang H. A Usual G-Protein-Coupled Receptor in Unusual Membranes. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201508648] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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59
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Nanoparticle-triggered release from lipid membrane vesicles. N Biotechnol 2015; 32:665-72. [DOI: 10.1016/j.nbt.2014.12.002] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2014] [Revised: 12/11/2014] [Accepted: 12/11/2014] [Indexed: 11/21/2022]
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60
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Habel J, Ogbonna A, Larsen N, Schulte L, Almdal K, Hélix-Nielsen C. How molecular internal-geometric parameters affect PB-PEO polymersome size in aqueous solution. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/polb.23954] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Joachim Habel
- Department of Environmental Engineering; Technical University of Denmark; Miljøvej, Building 113, 2800 Kgs. Lyngby Denmark
- Aquaporin A/S; Ole Maaløes Vej 3 2200 Copenhagen Denmark
| | - Anayo Ogbonna
- Aquaporin A/S; Ole Maaløes Vej 3 2200 Copenhagen Denmark
| | - Nanna Larsen
- University of Copenhagen, Copenhagen Biocenter; Ole Maaløes Vej 5 2200 Copenhagen Denmark
| | - Lars Schulte
- Department of Micro- and Nanotechnology; Technical University of Denmark; Produktionstorvet, Building 423, 2800 Kgs Lyngby Denmark
| | - Kristoffer Almdal
- Department of Micro- and Nanotechnology; Technical University of Denmark; Produktionstorvet, Building 423, 2800 Kgs Lyngby Denmark
| | - Claus Hélix-Nielsen
- Department of Environmental Engineering; Technical University of Denmark; Miljøvej, Building 113, 2800 Kgs. Lyngby Denmark
- Aquaporin A/S; Ole Maaløes Vej 3 2200 Copenhagen Denmark
- Laboratory for Water Biophysics and Membrane Processes, Faculty of Chemistry and Chemical Engineering; University of Maribor; Smetanova Ulica 17 2000 Maribor Slovenia
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61
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Schulz M, Binder WH. Mixed Hybrid Lipid/Polymer Vesicles as a Novel Membrane Platform. Macromol Rapid Commun 2015; 36:2031-41. [DOI: 10.1002/marc.201500344] [Citation(s) in RCA: 105] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Revised: 09/01/2015] [Indexed: 12/11/2022]
Affiliation(s)
- Matthias Schulz
- Martin-Luther University Halle-Wittenberg; Chair of Macromolecular Chemistry; Faculty of Natural Sciences II (Chemistry, Physics and Mathematics); Institute of Chemistry; D-06120 Halle (Saale) Germany
| | - Wolfgang H. Binder
- Martin-Luther University Halle-Wittenberg; Chair of Macromolecular Chemistry; Faculty of Natural Sciences II (Chemistry, Physics and Mathematics); Institute of Chemistry; D-06120 Halle (Saale) Germany
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62
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Synthesis of poly(sulfobetaine methacrylate)-grafted chitosan under γ-ray irradiation for alamethicin assembly. Colloids Surf B Biointerfaces 2015; 132:132-7. [DOI: 10.1016/j.colsurfb.2015.05.019] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Revised: 05/08/2015] [Accepted: 05/11/2015] [Indexed: 11/21/2022]
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63
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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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64
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Cheung DL. Aggregation of nanoparticles on one and two-component bilayer membranes. J Chem Phys 2015; 141:194908. [PMID: 25416913 DOI: 10.1063/1.4901740] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Using dissipative particle dynamics simulations the aggregation of nanoparticles on single and two-component bilayers is investigated. For a uniform bilayer the aggregation of nanoparticles depends strongly on the location of the particles in the bilayer; particles residing on the bilayer exterior cluster strongly under the influence of bilayer-mediated interactions, whereas the interaction between the particles in the bilayer interior is significantly weaker leading to more loosely bound, dynamic aggregates. The aggregation of nanoparticles on two-component bilayers composed of immiscible components changes due to competition between nanoparticle clustering and their adsorption on the boundary between the bilayer components. This reduces the size of the nanoparticle clusters formed on the bilayer exterior, with the clusters adhering onto the boundary between the bilayer components. Due to their weaker attraction nanoparticles in the interior of a mixed bilayer no longer aggregate and instead form strings along the boundary between the two bilayer components. Nanoparticles with an affinity to one bilayer component nucleate small domains of their favoured component around themselves. For asymmetric mixtures this leads to a notable change in the aggregation behaviour of the nanoparticles.
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Affiliation(s)
- David L Cheung
- Department of Pure and Applied Chemistry, University of Strathclyde, Glasgow G1 1XL, United Kingdom
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65
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Walde P, Umakoshi H, Stano P, Mavelli F. Emergent properties arising from the assembly of amphiphiles. Artificial vesicle membranes as reaction promoters and regulators. Chem Commun (Camb) 2015; 50:10177-97. [PMID: 24921467 DOI: 10.1039/c4cc02812k] [Citation(s) in RCA: 100] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
This article deals with artificial vesicles and their membranes as reaction promoters and regulators. Among the various molecular assemblies which can form in an aqueous medium from amphiphilic molecules, vesicle systems are unique. Vesicles compartmentalize the aqueous solution in which they exist, independent on whether the vesicles are biological vesicles (existing in living systems) or whether they are artificial vesicles (formed in vitro from natural or synthetic amphiphiles). After the formation of artificial vesicles, their aqueous interior (the endovesicular volume) may become - or may be made - chemically different from the external medium (the exovesicular solution), depending on how the vesicles are prepared. The existence of differences between endo- and exovesicular composition is one of the features on the basis of which biological vesicles contribute to the complex functioning of living organisms. Furthermore, artificial vesicles can be formed from mixtures of amphiphiles in such a way that the vesicle membranes become molecularly, compositionally and organizationally highly complex, similarly to the lipidic matrix of biological membranes. All the various properties of artificial vesicles as membranous compartment systems emerge from molecular assembly as these properties are not present in the individual molecules the system is composed of. One particular emergent property of vesicle membranes is their possible functioning as promoters and regulators of chemical reactions caused by the localization of reaction components, and possibly catalysts, within or on the surface of the membranes. This specific feature is reviewed and highlighted with a few selected examples which range from the promotion of decarboxylation reactions, the selective binding of DNA or RNA to suitable vesicle membranes, and the reactivation of fragmented enzymes to the regulation of the enzymatic synthesis of polymers. Such type of emergent properties of vesicle membranes may have been important for the prebiological evolution of protocells, the hypothetical compartment systems preceding the first cells in those chemical and physico-chemical processes that led to the origin of life.
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Affiliation(s)
- Peter Walde
- Department of Materials, ETH Zürich, Vladimir-Prelog-Weg 5, CH-8093 Zürich, Switzerland.
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66
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Gortzi O, Rovoli M, Lalas S, Kontopidis G. Development and Evaluation of a Phospholipid-sterol-protein Membrane Resembling System. FOOD BIOPHYS 2015. [DOI: 10.1007/s11483-015-9390-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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67
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Fane AG, Wang R, Hu MX. Synthetische Membranen für die Wasseraufbereitung: aktueller Stand und Perspektiven. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201409783] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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68
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Fane AG, Wang R, Hu MX. Synthetic Membranes for Water Purification: Status and Future. Angew Chem Int Ed Engl 2015; 54:3368-86. [DOI: 10.1002/anie.201409783] [Citation(s) in RCA: 465] [Impact Index Per Article: 51.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2014] [Indexed: 11/08/2022]
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69
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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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70
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Ganguly A, Ghosh S, Guchhait N. Interaction of triblock co-polymer micelles with phospholipid-bilayer: a spectroscopic investigation using a potential chloride channel blocker. Phys Chem Chem Phys 2015; 17:6597-605. [DOI: 10.1039/c4cp05574h] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Experimental results reveal that addition of P123 to the drug-bound egg-PC vesicles results in a preferential complexation of the drug with the Pluronic leaving the lipid vesicles aside which indicates a substantially stronger binding interaction of the drug with P123 than that with egg-PC.
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Affiliation(s)
| | - Soumen Ghosh
- Department of Chemistry
- University of Calcutta
- Calcutta-700009
- India
| | - Nikhil Guchhait
- Department of Chemistry
- University of Calcutta
- Calcutta-700009
- India
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71
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Zhang Y, Sargent JL, Boudouris BW, Phillip WA. Nanoporous membranes generated from self-assembled block polymer precursors:Quo Vadis? J Appl Polym Sci 2014. [DOI: 10.1002/app.41683] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Yizhou Zhang
- Department of Chemical and Biomolecular Engineering; University of Notre Dame; Notre Dame Indiana 46556
| | - Jessica L. Sargent
- School of Chemical Engineering, Purdue University; West Lafayette Indiana 47907
| | - Bryan W. Boudouris
- School of Chemical Engineering, Purdue University; West Lafayette Indiana 47907
| | - William A. Phillip
- Department of Chemical and Biomolecular Engineering; University of Notre Dame; Notre Dame Indiana 46556
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72
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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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73
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Tamate R, Ueki T, Shibayama M, Yoshida R. Self-Oscillating Vesicles: Spontaneous Cyclic Structural Changes of Synthetic Diblock Copolymers. Angew Chem Int Ed Engl 2014; 53:11248-52. [DOI: 10.1002/anie.201406953] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2014] [Revised: 08/13/2014] [Indexed: 11/09/2022]
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74
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Tamate R, Ueki T, Shibayama M, Yoshida R. Self-Oscillating Vesicles: Spontaneous Cyclic Structural Changes of Synthetic Diblock Copolymers. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201406953] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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75
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Langowska K, Kowal J, Palivan CG, Meier W. A general strategy for creating self-defending surfaces for controlled drug production for long periods of time. J Mater Chem B 2014; 2:4684-4693. [PMID: 32262280 DOI: 10.1039/c4tb00277f] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Infections associated with bacterial adhesion and subsequent biofilm formation constitute a grave medical issue for which conventional antibiotic therapies remain ineffective. Here, we introduce a new strategy employing nanotechnology to create smart surfaces with self-defending properties that result in controlled drug production and controlled release for long periods of time. Self-defending surfaces on solid supports are prepared by immobilizing polymer nanoreactors containing an encapsulated biocatalyst that can convert non-antibiotic substrates to an abiotic drug. For medical applications and biosensing, the immobilization method must fulfill specific criteria, and these were achieved by an immobilization strategy based on Schiff base formation between aldehyde groups on the outer surface of nanoreactors and amino groups on the solid support surface, followed by reductive amination. The resulting self-defending surfaces allow control of drug production at a specific rate for a specific period of time by adding predetermined amounts of substrate to the outer medium, minimization of dosages and therefore systemic toxicity, and limitation of the immune response. Such self-defending surfaces producing drugs offer a versatile strategy for the development of smart surfaces with improved stability and efficacy (by changing the biocatalyst) to serve as biosensors, antifouling surfaces, or smart packages.
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Affiliation(s)
- Karolina Langowska
- Department of Chemistry, University of Basel, Klingelbergstrasse 80, 4056 Basel, Switzerland.
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76
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Self-assembly of amphiphilic Janus dendrimers into uniform onion-like dendrimersomes with predictable size and number of bilayers. Proc Natl Acad Sci U S A 2014; 111:9058-63. [PMID: 24927561 DOI: 10.1073/pnas.1402858111] [Citation(s) in RCA: 113] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
A constitutional isomeric library synthesized by a modular approach has been used to discover six amphiphilic Janus dendrimer primary structures, which self-assemble into uniform onion-like vesicles with predictable dimensions and number of internal bilayers. These vesicles, denoted onion-like dendrimersomes, are assembled by simple injection of a solution of Janus dendrimer in a water-miscible solvent into water or buffer. These dendrimersomes provide mimics of double-bilayer and multibilayer biological membranes with dimensions and number of bilayers predicted by the Janus compound concentration in water. The simple injection method of preparation is accessible without any special equipment, generating uniform vesicles, and thus provides a promising tool for fundamental studies as well as technological applications in nanomedicine and other fields.
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77
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Lin YL, Chang HY, Sheng YJ, Tsao HK. Self-assembled polymersomes formed by symmetric, asymmetric and side-chain-tethered coil-rod-coil triblock copolymers. SOFT MATTER 2014; 10:1840-1852. [PMID: 24651905 DOI: 10.1039/c3sm52916a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Self-assembly behaviors of coil-rod-coil copolymers in selective solvents are explored by dissipative particle dynamics. The morphological phase diagram as a function of rod length and coil length shows five distinct types of aggregates, including spherical micelles, worm-like micelles, disk-like aggregates, honeycomb structures, and polymersomes. Small polymersomes are formed at rather poor alignment associated with monolayered rod domains. Some of the rods are even lying perpendicular to the radial direction. For symmetric copolymers (CmRxCm), the condition of vesicle formation is restricted to short coil and rod lengths. To favor the formation of CRC-polymersomes, two architecture modifications are adopted. One is to increase the coil length asymmetrically to be CmRxCn, where n > m. The other one is to tether a T-block onto the middle of the rod-block as Cm(RxTy)Cm copolymers. For those CRC-polymersomes, structural, transport, and mechanical properties of the vesicular membrane are determined, including membrane thickness, area density of coil blocks, order parameter, solvent permeability, frequency of flip-flop, membrane tension, and stretching and bending moduli. The influences of the coil length (n) and tethered block length (y) on membrane properties are examined. Finally, the mechanism of membrane fusion between CRC-polymersomes is investigated. The fusion process involves four stages and in the contact region the rods lying perpendicular to the radial direction of the polymersome play the key role. The encounter of two vesicles may result in a fused, hemifused, or non-fused polymersome. The final fate is determined by the competition between membrane tension and the steric barrier of the coil corona. The fusion outcome may change if the tension is altered by manipulating the lumen pressure.
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Affiliation(s)
- Yung-Lung Lin
- Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan 106, Republic of China.
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78
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Lin YL, Chang HY, Sheng YJ, Tsao HK. The fusion mechanism of small polymersomes formed by rod-coil diblock copolymers. SOFT MATTER 2014; 10:1500-1511. [PMID: 24652278 DOI: 10.1039/c3sm52387j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The fusion mechanism of polymersomes self-assembled by rod-coil copolymers is intrinsically different from that of liposomes due to the effect of chain topology on conformational entropy and molecular packing. The influences of membrane tension, coil-block length, rod-block length, mutual compatibility between the solvent and the rod-coil block, and π-π interaction strength on the fusion pathway are explored by dissipative particle dynamics. The fusion process of spontaneously formed polymersomes generally consists of four stages. In the kissing stage, hopping of rod-blocks forms a connection between two vesicles of a one-legged rod-coil copolymer. In the adhesion stage, a stalk is developed by a few link-up rods and then a stretched diaphragm with rods lying parallel to the stretching direction is formed in the hemi-fusion stage. Eventually, a pore is developed and expanded in the fusion stage. If the membrane tension (τ) is adjusted by deflation/inflation of the polymersomes, the hemi-fusion diaphragm disappears. As τ is reduced, multiple stalks take shape and lead to the formation of inverted micelles, which is the rate-determining step and raises the fusion time substantially. As τ is elevated, a neck is developed after the stalk formation. The fusion process is significantly accelerated. τ of spontaneously formed vesicles varies with the coil-block length, rod-block length, solvent quality, and π-π interaction strength. There exists a critical value of τ below which the fusion process cannot be completed and a hemi-fused polymersome is formed. In addition to τ, the anisotropic steric interactions within the rod layers also resist hopping of longer rod-blocks. The coil layers develop a barrier impeding fusion between vesicles with longer coil-blocks. Consequently, lowering the solvent quality for the coil-block or rod-block facilities the fusion process due to the formation of a thinner coil layer.
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Affiliation(s)
- Yung-Lung Lin
- Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan 106, Republic of China.
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79
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Kuang L, Olson TL, Lin S, Flores M, Jiang Y, Zheng W, Williams JC, Allen JP, Liang H. Interface for Light-Driven Electron Transfer by Photosynthetic Complexes Across Block Copolymer Membranes. J Phys Chem Lett 2014; 5:787-791. [PMID: 26274068 DOI: 10.1021/jz402766y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Incorporation of membrane proteins into nanodevices to mediate recognition and transport in a collective and scalable fashion remains a challenging problem. We demonstrate how nanoscale photovoltaics could be designed using robust synthetic nanomembranes with incorporated photosynthetic reaction centers (RCs). Specifically, RCs from Rhodobacter sphaeroides are reconstituted spontaneously into rationally designed polybutadiene membranes to form hierarchically organized proteopolymer membrane arrays via a charge-interaction-directed reconstitution mechanism. Once incorporated, the RCs are fully active for prolonged periods based upon a variety of spectroscopic measurements, underscoring preservation of their 3D pigment configuration critical for light-driven charge transfer. This result provides a strategy to construct solar conversion devices using structurally versatile proteopolymer membranes with integrated RC functions to harvest broad regions of the solar spectrum.
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Affiliation(s)
- Liangju Kuang
- †Department of Metallurgical and Materials Engineering, Colorado School of Mines, Golden, Colorado 80401, United States
| | - Tien L Olson
- ‡Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287, United States
| | - Su Lin
- ‡Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287, United States
| | - Marco Flores
- ‡Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287, United States
| | - Yunjiang Jiang
- †Department of Metallurgical and Materials Engineering, Colorado School of Mines, Golden, Colorado 80401, United States
| | - Wan Zheng
- †Department of Metallurgical and Materials Engineering, Colorado School of Mines, Golden, Colorado 80401, United States
| | - JoAnn C Williams
- ‡Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287, United States
| | - James P Allen
- ‡Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287, United States
| | - Hongjun Liang
- †Department of Metallurgical and Materials Engineering, Colorado School of Mines, Golden, Colorado 80401, United States
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80
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81
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Zhang S, Sun HJ, Hughes AD, Draghici B, Lejnieks J, Leowanawat P, Bertin A, Otero De Leon L, Kulikov OV, Chen Y, Pochan DJ, Heiney PA, Percec V. "Single-single" amphiphilic janus dendrimers self-assemble into uniform dendrimersomes with predictable size. ACS NANO 2014; 8:1554-1565. [PMID: 24397243 DOI: 10.1021/nn405790x] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
An accelerated modular synthesis of six libraries containing 29 amphiphilic Janus dendrimers, employed to discover and predict functions via primary structures, is reported. These dendrimers were constructed from a single hydrophobic and a single hydrophilic dendron, interconnected with l-Ala to form two constitutional isomeric libraries, with Gly to produce one library, and with l-propanediol ester to generate two additional constitutional isomeric libraries. They are denoted "single-single" amphiphilic Janus dendrimers. Assemblies obtained by injection of their ethanol solution into water were analyzed by dynamic light scattering and cryogenic transmission electron microscopy. A diversity of complex structures including soft and hard dendrimersomes, cubosomes, solid lamellae, and rod-like micelles were obtained in water. It was discovered that the "single-single" amphiphilic Janus dendrimers containing three triethylene glycol groups in the hydrophilic dendron favored the formation of dendrimersomes. Assemblies in bulk analyzed by differential scanning calorimetry and powder X-ray diffraction revealed that the amphiphilic Janus dendrimers with melting point or glass transition below room temperature self-assemble into soft dendrimersomes in water, while those with higher temperature transitions produce hard assemblies. In the range of concentrations where their size distribution is narrow, the diameter of the dendrimersomes is predictable by the d-spacing of their assemblies in bulk. These results suggested the synthesis of Library 6 containing two simpler constitutional isomeric benzyl ester based amphiphilic Janus dendrimers that self-assemble in water into soft dendrimersomes and multidendrimersome dendrimersomes with predictable dimensions.
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Affiliation(s)
- Shaodong Zhang
- Roy & Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania , Philadelphia, Pennsylvania 19104-6323, United States
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82
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Kuang L, Fernandes DA, O'Halloran M, Zheng W, Jiang Y, Ladizhansky V, Brown LS, Liang H. "Frozen" block copolymer nanomembranes with light-driven proton pumping performance. ACS NANO 2014; 8:537-545. [PMID: 24358932 DOI: 10.1021/nn4059852] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Cellular membranes are natural nanoengineering devices, where matter transport, information processing, and energy conversion across the nanoscale boundaries are mediated by membrane proteins (MPs). Despite the great potential of MPs for nanotechnologies, their broad utility in engineered systems is limited by the fluidic and often labile nature of MP-supporting membranes. Little is known on how to direct spontaneous reconstitution of MPs into robust synthetic nanomembranes or how to tune MP functions through rational design of these membranes. Here we report that proteorhodopsin (PR), a light-driven proton pump, can be spontaneously reconstituted into "frozen" (i.e., glassy state) amphiphilic block copolymer membranes via a charge-interaction-directed reconstitution mechanism. We show that PR is not enslaved by a fluidic or lipid-based membrane environment. Rather, well-defined block copolymer nanomembranes, with their tunable membrane moduli, act as allosteric regulators to support the structural integrity and function of PR. Versatile membrane designs exist to modulate the conformational energetics of reconstituted MPs, therefore optimizing proteomembrane stability and performance in synthetic systems.
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Affiliation(s)
- Liangju Kuang
- Department of Metallurgical and Materials Engineering, Colorado School of Mines , Golden, Colorado 80401, United States
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83
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Gaitzsch J, Appelhans D, Janke A, Strempel M, Schwille P, Voit B. Cross-linked and pH sensitive supported polymer bilayers from polymersomes - studies concerning thickness, rigidity and fluidity. SOFT MATTER 2014; 10:75-82. [PMID: 24651668 DOI: 10.1039/c3sm52016a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Polymersomes are at the leading edge of biomedical and nanoparticle research. In order to get closer insights into their mechanical properties, the bilayer forming them needs to be studied thoroughly. Here, we report on the bilayer formation, swelling behaviour, rigidity and fluidity of our membranes derived from pH sensitive and photo-cross-linkable polymersomes.
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Affiliation(s)
- Jens Gaitzsch
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Straße 6, 01069 Dresden, Germany.
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84
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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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85
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Rovoli M, Gortzi O, Lalas S, Kontopidis G. β-Lactoglobulin improves liposome’s encapsulation properties for vitamin E delivery. J Liposome Res 2013; 24:74-81. [DOI: 10.3109/08982104.2013.839701] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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86
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Wu X, Li S, Coumes F, Darcos V, Lai Kee Him J, Bron P. Modeling and self-assembly behavior of PEG-PLA-PEG triblock copolymers in aqueous solution. NANOSCALE 2013; 5:9010-9017. [PMID: 23907600 DOI: 10.1039/c3nr02899b] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A series of poly(ethylene glycol)-polylactide-poly(ethylene glycol) (PEG-PLA-PEG) triblock copolymers with symmetric or asymmetric chain structures were synthesized by combination of ring-opening polymerization and copper-catalyzed click chemistry. The resulting copolymers were used to prepare self-assembled aggregates by dialysis. Various architectures such as nanotubes, polymersomes and spherical micelles were observed from transmission electron microscopy (TEM), cryo-TEM and atomic force microscopy (AFM) measurements. The formation of diverse aggregates is explained by modeling from the angle of both geometry and thermodynamics. From the angle of geometry, a "blob" model based on the Daoud-Cotton model for star polymers is proposed to describe the aggregate structures and structural changes with copolymer composition and molar mass. In fact, the copolymer chains extend in aqueous medium to form single layer polymersomes to minimize the system's free energy if one of the two PEG blocks is short enough. The curvature of polymersomes is dependent on the chain structure of copolymers, especially on the length of PLA blocks. A constant branch number of aggregates (f) is thus required to preserve the morphology of polymersomes. Meanwhile, the aggregation number (N(agg)) determined from the thermodynamics of self-assembly is roughly proportional to the total length of polymer chains. Comparing f to N(agg), the aggregates take the form of polymersomes if N(agg) ≈ f, and change to nanotubes if N(agg) > f to conform to the limits from both curvature and aggregation number. The length of nanotubes is mainly determined by the difference between N(agg) and f. However, the hollow structure becomes unstable when both PEG segments are too long, and the aggregates eventually collapse to yield spherical micelles. Therefore, this work gives new insights into the self-assembly behavior of PEG-PLA-PEG triblock copolymers in aqueous solution which present great interest for biomedical and pharmaceutical applications.
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Affiliation(s)
- Xiaohan Wu
- Max Mousseron Institute on Biomolecules, UMR CNRS 5247, University Montpellier I, 34093 Montpellier, France.
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87
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Rabinovich AL, Lyubartsev AP. Computer simulation of lipid membranes: Methodology and achievements. POLYMER SCIENCE SERIES C 2013. [DOI: 10.1134/s1811238213070060] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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88
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Gaitzsch J, Canton I, Appelhans D, Battaglia G, Voit B. Cellular Interactions with Photo-Cross-Linked and pH-Sensitive Polymersomes: Biocompatibility and Uptake Studies. Biomacromolecules 2012; 13:4188-95. [DOI: 10.1021/bm3014704] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Jens Gaitzsch
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Straße
6, 01069 Dresden, Germany
- Organic Chemistry
of Polymers, Technische Universität Dresden, 01062 Dresden, Germany
| | - Irene Canton
- Department of Biomedical
Science, The University of Sheffield, Western Bank, S10 2TN Sheffield, United Kingdom
| | - Dietmar Appelhans
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Straße
6, 01069 Dresden, Germany
| | - Giuseppe Battaglia
- Department of Biomedical
Science, The University of Sheffield, Western Bank, S10 2TN Sheffield, United Kingdom
| | - Brigitte Voit
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Straße
6, 01069 Dresden, Germany
- Organic Chemistry
of Polymers, Technische Universität Dresden, 01062 Dresden, Germany
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89
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Barthel MJ, Rudolph T, Crotty S, Schacher FH, Schubert US. Homo- and diblock copolymers of poly(furfuryl glycidyl ether) by living anionic polymerization: Toward reversibly core-crosslinked micelles. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/pola.26327] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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90
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Jung S, Swamy BY, Moon JB, Kim DH, Chung I. Anti-AIDS active polyrotaxane-AZT conjugates with bioactive bulky stoppers and their nanoparticles. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/pola.26317] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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91
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Wan LM, Li HX, Zhao W, Ding HY, Fang YY, Ni PH, Lang JP. Oxidative polymerization of 2,6-dimethylphenol to form poly(2,6-dimethyl-1,4-phenylene oxide) in water through one water-soluble copper(II) complex of a zwitterionic calix[4]arene. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/pola.26308] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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