1
|
Phase separation in polymer-based biomimetic structures containing planar membranes. Biointerphases 2022; 17:060802. [PMID: 36575113 DOI: 10.1116/6.0002078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Phase separation in biological membranes is crucial for proper cellular functions, such as signaling and trafficking, as it mediates the interactions of condensates on membrane-bound organelles and transmembrane transport to targeted destination compartments. The separation of a lipid bilayer into phases and the formation of lipid rafts involve the restructuring of molecular localization, their immobilization, and local accumulation. By understanding the processes underlying the formation of lipid rafts in a cellular membrane, it is possible to reconstitute this phenomenon in synthetic biomimetic membranes, such as hybrids of lipids and polymers or membranes composed solely of polymers, which offer an increased physicochemical stability and unlimited possibilities of chemical modification and functionalization. In this article, we relate the main lipid bilayer phase transition phenomenon with respect to hybrid biomimetic membranes, composed of lipids mixed with polymers, and fully synthetic membranes. Following, we review the occurrence of phase separation in biomimetic hybrid membranes based on lipids and/or direct lipid analogs, amphiphilic block copolymers. We further exemplify the phase separation and the resulting properties and applications in planar membranes, free-standing and solid-supported. We briefly list methods leading to the formation of such biomimetic membranes and reflect on their improved overall stability and influence on the separation into different phases within the membranes. Due to the importance of phase separation and compartmentalization in cellular membranes, we are convinced that this compiled overview of this phenomenon will be helpful for any researcher in the biomimicry area.
Collapse
|
2
|
Chen W, Wu Y, Deng J, Yang Z, Chen J, Tan Q, Guo M, Jin Y. Phospholipid-Membrane-Based Nanovesicles Acting as Vaccines for Tumor Immunotherapy: Classification, Mechanisms and Applications. Pharmaceutics 2022; 14:pharmaceutics14112446. [PMID: 36432636 PMCID: PMC9698496 DOI: 10.3390/pharmaceutics14112446] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 11/08/2022] [Accepted: 11/10/2022] [Indexed: 11/16/2022] Open
Abstract
Membrane vesicles, a group of nano- or microsized vesicles, can be internalized or interact with the recipient cells, depending on their parental cells, size, structure and content. Membrane vesicles fuse with the target cell membrane, or they bind to the receptors on the cell surface, to transfer special effects. Based on versatile features, they can modulate the functions of immune cells and therefore influence immune responses. In the field of tumor therapeutic applications, phospholipid-membrane-based nanovesicles attract increased interest. Academic institutions and industrial companies are putting in effort to design, modify and apply membrane vesicles as potential tumor vaccines contributing to tumor immunotherapy. This review focuses on the currently most-used types of membrane vesicles (including liposomes, bacterial membrane vesicles, tumor- and dendritic-cell-derived extracellular vesicles) acting as tumor vaccines, and describes the classification, mechanism and application of these nanovesicles.
Collapse
Affiliation(s)
- Wenjuan Chen
- Department of Respiratory and Critical Care Medicine, Hubei Province Clinical Research Center for Major Respiratory Diseases, NHC Key Laboratory of Pulmonary Diseases, Wuhan Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China
- Hubei Province Engineering Research Center for Tumor-Targeted Biochemotherapy, MOE Key Laboratory of Biological Targeted Therapy, Wuhan Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China
| | - Yali Wu
- Department of Respiratory and Critical Care Medicine, Hubei Province Clinical Research Center for Major Respiratory Diseases, NHC Key Laboratory of Pulmonary Diseases, Wuhan Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China
- Hubei Province Engineering Research Center for Tumor-Targeted Biochemotherapy, MOE Key Laboratory of Biological Targeted Therapy, Wuhan Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China
| | - Jingjing Deng
- Department of Respiratory and Critical Care Medicine, Hubei Province Clinical Research Center for Major Respiratory Diseases, NHC Key Laboratory of Pulmonary Diseases, Wuhan Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China
- Hubei Province Engineering Research Center for Tumor-Targeted Biochemotherapy, MOE Key Laboratory of Biological Targeted Therapy, Wuhan Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China
| | - Zimo Yang
- Department of Respiratory and Critical Care Medicine, Hubei Province Clinical Research Center for Major Respiratory Diseases, NHC Key Laboratory of Pulmonary Diseases, Wuhan Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China
- Hubei Province Engineering Research Center for Tumor-Targeted Biochemotherapy, MOE Key Laboratory of Biological Targeted Therapy, Wuhan Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China
| | - Jiangbin Chen
- Department of Respiratory and Critical Care Medicine, Hubei Province Clinical Research Center for Major Respiratory Diseases, NHC Key Laboratory of Pulmonary Diseases, Wuhan Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China
- Hubei Province Engineering Research Center for Tumor-Targeted Biochemotherapy, MOE Key Laboratory of Biological Targeted Therapy, Wuhan Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China
| | - Qi Tan
- Department of Respiratory and Critical Care Medicine, Hubei Province Clinical Research Center for Major Respiratory Diseases, NHC Key Laboratory of Pulmonary Diseases, Wuhan Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China
- Hubei Province Engineering Research Center for Tumor-Targeted Biochemotherapy, MOE Key Laboratory of Biological Targeted Therapy, Wuhan Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China
| | - Mengfei Guo
- Department of Respiratory and Critical Care Medicine, Hubei Province Clinical Research Center for Major Respiratory Diseases, NHC Key Laboratory of Pulmonary Diseases, Wuhan Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China
- Hubei Province Engineering Research Center for Tumor-Targeted Biochemotherapy, MOE Key Laboratory of Biological Targeted Therapy, Wuhan Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China
| | - Yang Jin
- Department of Respiratory and Critical Care Medicine, Hubei Province Clinical Research Center for Major Respiratory Diseases, NHC Key Laboratory of Pulmonary Diseases, Wuhan Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China
- Hubei Province Engineering Research Center for Tumor-Targeted Biochemotherapy, MOE Key Laboratory of Biological Targeted Therapy, Wuhan Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China
- Correspondence: ; Tel.: +86-135-5436-1146
| |
Collapse
|
3
|
Koner S, Tawfik J, Mashali F, Kennison KB, McClintic WT, Heberle FA, Tu YM, Kumar M, Sarles SA. Homogeneous hybrid droplet interface bilayers assembled from binary mixtures of DPhPC phospholipids and PB-b-PEO diblock copolymers. BIOCHIMICA ET BIOPHYSICA ACTA. BIOMEMBRANES 2022; 1864:183997. [PMID: 35718208 DOI: 10.1016/j.bbamem.2022.183997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Revised: 06/09/2022] [Accepted: 06/14/2022] [Indexed: 06/15/2023]
Abstract
Hybrid membranes built from phospholipids and amphiphilic block copolymers seek to capitalize on the benefits of both constituents for constructing biomimetic interfaces with improved performance. However, hybrid membranes have not been formed or studied using the droplet interface bilayer (DIB) method, an approach that offers advantages for revealing nanoscale changes in membrane structure and mechanics and offers a path toward assembling higher-order tissues. We report on hybrid droplet interface bilayers (hDIBs) formed in hexadecane from binary mixtures of synthetic diphytanoyl phosphatidylcholine (DPhPC) lipids and low molecular weight 1,2 polybutadiene-b-polyethylene oxide (PBPEO) amphiphilic block copolymers and use electrophysiology measurements and imaging to assess the effects of PBPEO in the membrane. This work reveals that hDIBs containing up to 15 mol% PBPEO plus DPhPC are homogeneously mixtures of lipids and polymers, remain highly resistive to ion transport, and are stable-including under applied voltage. Moreover, they exhibit hydrophobic thicknesses similar to DPhPC-only bilayers, but also have significantly lower values of membrane tension. These characteristics coincide with reduced energy of adhesion between droplets and the formation of alamethicin ion channels at significantly lower threshold voltages, demonstrating that even moderate amounts of amphiphilic block copolymers in a lipid bilayer provide a route for tuning the physical properties of a biomimetic membrane.
Collapse
Affiliation(s)
- Subhadeep Koner
- Department of Mechanical Aerospace and Biomedical Engineering, University of Tennessee, Knoxville, TN 37996, USA
| | - Joseph Tawfik
- Department of Mechanical Aerospace and Biomedical Engineering, University of Tennessee, Knoxville, TN 37996, USA
| | - Farzin Mashali
- Department of Mechanical Aerospace and Biomedical Engineering, University of Tennessee, Knoxville, TN 37996, USA
| | - Kristen B Kennison
- Department of Chemistry, University of Tennessee, Knoxville, TN 37996, USA
| | | | | | - Yu-Ming Tu
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Manish Kumar
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, TX 78712, USA; Department of Civil, Architectural and Environmental Engineering, The University of Texas at Austin, Austin, TX 78712, USA
| | - Stephen A Sarles
- Department of Mechanical Aerospace and Biomedical Engineering, University of Tennessee, Knoxville, TN 37996, USA.
| |
Collapse
|
4
|
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: 10] [Impact Index Per Article: 3.3] [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.
Collapse
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
| |
Collapse
|
5
|
Abstract
Hierarchic self-assembly underpins much of the form and function seen in synthetic or biological soft materials. Lipids are paramount examples, building themselves in nature or synthetically in a variety of meso/nanostructures. Synthetic block copolymers capture many of lipid's structural and functional properties. Lipids are typically biocompatible and high molecular weight polymers are mechanically robust and chemically versatile. The development of new materials for applications like controlled drug/gene/protein delivery, biosensors, and artificial cells often requires the combination of lipids and polymers. The emergent composite material, a "polymer-lipid hybrid membrane", displays synergistic properties not seen in pure components. Specific examples include the observation that hybrid membranes undergo lateral phase separation that can correlate in registry across multiple layers into a three-dimensional phase-separated system with enhanced permeability of encapsulated drugs. It is timely to underpin these emergent properties in several categories of hybrid systems ranging from colloidal suspensions to supported hybrid films. In this review, we discuss the form and function of a vast number of polymer-lipid hybrid systems published to date. We rationalize the results to raise new fundamental understanding of hybrid self-assembling soft materials as well as to enable the design of new supramolecular systems and applications.
Collapse
Affiliation(s)
- Yoo Kyung Go
- Department of Materials Science and Engineering, University of Illinois at Urbana─Champaign, Urbana, Illinois 61801, United States
| | - Cecilia Leal
- Department of Materials Science and Engineering, University of Illinois at Urbana─Champaign, Urbana, Illinois 61801, United States
| |
Collapse
|
6
|
Rahikkala A, Fontana F, Bauleth-Ramos T, Correia A, Kemell M, Seitsonen J, Mäkilä E, Sarmento B, Salonen J, Ruokolainen J, Hirvonen J, Santos HA. Hybrid red blood cell membrane coated porous silicon nanoparticles functionalized with cancer antigen induce depletion of T cells. RSC Adv 2020; 10:35198-35205. [PMID: 35515680 PMCID: PMC9056825 DOI: 10.1039/d0ra05900e] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Accepted: 09/16/2020] [Indexed: 12/12/2022] Open
Abstract
Erythrocyte-based drug delivery systems have been investigated for their biocompatibility, long circulation time, and capability to transport cargo all around the body, thus presenting enormous potential in medical applications. In this study, we investigated hybrid nanoparticles consisting of nano-sized autologous or allogeneic red blood cell (RBC) membranes encapsulating porous silicon nanoparticles (PSi NPs). These NPs were functionalized with a model cancer antigen TRP2, which was either expressed on the surface of the RBCs by a cell membrane-mimicking block copolymer polydimethylsiloxane-b-poly-2-methyl-2-oxazoline, or attached on the PSi NPs, thus hidden within the encapsulation. When in the presence of peripheral blood immune cells, these NPs resulted in apoptotic cell death of T cells, where the NPs having TRP2 within the encapsulation led to a stronger T cell deletion. The deletion of the T cells did not change the relative proportion of CD4+ and cytotoxic CD8+ T cells. Overall, this work shows the combination of nano-sized RBCs, PSi, and antigenic peptides may have use in the treatment of autoimmune diseases. We report a study on the effect of red blood cell membrane based cancer antigen-functionalized nanoparticles on peripheral blood T cells. These nanoparticles induce apoptosis of T cells and they may have use in treating autoimmune diseases.![]()
Collapse
Affiliation(s)
- Antti Rahikkala
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki FI-00014 Helsinki Finland
| | - Flavia Fontana
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki FI-00014 Helsinki Finland
| | - Tomás Bauleth-Ramos
- Instituto de Investigação e Inovação em Saúde (I3S), University of Porto Rua Alfredo Allen, 208 4200-135 Porto Portugal.,Instituto de Engenharia Biomédica (INEB), University of Porto Rua Alfredo Allen, 208 4200-135 Porto Portugal.,Instituto Ciências Biomédicas Abel Salazar (ICBAS), University of Porto Rua Jorge Viterbo 228 4150-180 Porto Portugal
| | - Alexandra Correia
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki FI-00014 Helsinki Finland
| | - Marianna Kemell
- Department of Chemistry, University of Helsinki FI-00014 Helsinki Finland
| | - Jani Seitsonen
- Nanomicroscopy Center, Aalto University FI-02150 Espoo Finland
| | - Ermei Mäkilä
- Laboratory of Industrial Physics, Department of Physics, University of Turku FI-20014 Turku Finland
| | - Bruno Sarmento
- CESPU, Instituto de Investigação e Formação Avançada em Ciências e Tecnologias da Saúde, Instituto Universitário de Ciências da Saúde 4585-116 Gandra Portugal
| | - Jarno Salonen
- Laboratory of Industrial Physics, Department of Physics, University of Turku FI-20014 Turku Finland
| | | | - Jouni Hirvonen
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki FI-00014 Helsinki Finland
| | - Hélder A Santos
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki FI-00014 Helsinki Finland .,Helsinki Institute of Life Science (HiLIFE), University of Helsinki FI-00014 Helsinki Finland
| |
Collapse
|
7
|
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
| |
Collapse
|
8
|
Krywko-Cendrowska A, di Leone S, Bina M, Yorulmaz-Avsar S, Palivan CG, Meier W. Recent Advances in Hybrid Biomimetic Polymer-Based Films: from Assembly to Applications. Polymers (Basel) 2020; 12:E1003. [PMID: 32357541 PMCID: PMC7285097 DOI: 10.3390/polym12051003] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2020] [Revised: 04/15/2020] [Accepted: 04/16/2020] [Indexed: 12/21/2022] Open
Abstract
Biological membranes, in addition to being a cell boundary, can host a variety of proteins that are involved in different biological functions, including selective nutrient transport, signal transduction, inter- and intra-cellular communication, and cell-cell recognition. Due to their extreme complexity, there has been an increasing interest in developing model membrane systems of controlled properties based on combinations of polymers and different biomacromolecules, i.e., polymer-based hybrid films. In this review, we have highlighted recent advances in the development and applications of hybrid biomimetic planar systems based on different polymeric species. We have focused in particular on hybrid films based on (i) polyelectrolytes, (ii) polymer brushes, as well as (iii) tethers and cushions formed from synthetic polymers, and (iv) block copolymers and their combinations with biomacromolecules, such as lipids, proteins, enzymes, biopolymers, and chosen nanoparticles. In this respect, multiple approaches to the synthesis, characterization, and processing of such hybrid films have been presented. The review has further exemplified their bioengineering, biomedical, and environmental applications, in dependence on the composition and properties of the respective hybrids. We believed that this comprehensive review would be of interest to both the specialists in the field of biomimicry as well as persons entering the field.
Collapse
Affiliation(s)
| | | | | | | | - Cornelia G. Palivan
- Department of Chemistry, University of Basel, Mattenstrasse 24a, BPR 1096, 4058 Basel, Switzerland; (A.K.-C.); (S.d.L.); (M.B.); (S.Y.-A.)
| | - Wolfgang Meier
- Department of Chemistry, University of Basel, Mattenstrasse 24a, BPR 1096, 4058 Basel, Switzerland; (A.K.-C.); (S.d.L.); (M.B.); (S.Y.-A.)
| |
Collapse
|
9
|
Godoy-Gallardo M, York-Duran MJ, Hosta-Rigau L. Recent Progress in Micro/Nanoreactors toward the Creation of Artificial Organelles. Adv Healthc Mater 2018; 7. [PMID: 29205928 DOI: 10.1002/adhm.201700917] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Revised: 10/11/2017] [Indexed: 12/25/2022]
Abstract
Artificial organelles created from a bottom up approach are a new type of engineered materials, which are not designed to be living but, instead, to mimic some specific functions inside cells. By doing so, artificial organelles are expected to become a powerful tool in biomedicine. They can act as nanoreactors to convert a prodrug into a drug inside the cells or as carriers encapsulating therapeutic enzymes to replace malfunctioning organelles in pathological conditions. For the design of artificial organelles, several requirements need to be fulfilled: a compartmentalized structure that can encapsulate the synthetic machinery to perform an enzymatic function, as well as a means to allow for communication between the interior of the artificial organelle and the external environment, so that substrates and products can diffuse in and out the carrier allowing for continuous enzymatic reactions. The most recent and exciting advances in architectures that fulfill the aforementioned requirements are featured in this review. Artificial organelles are classified depending on their constituting materials, being lipid and polymer-based systems the most prominent ones. Finally, special emphasis will be put on the intracellular response of these newly emerging systems.
Collapse
Affiliation(s)
- Maria Godoy-Gallardo
- Department of Micro- and Nanotechnology; Center for Nanomedicine and Theranostics; DTU; Nanotech; Technical University of Denmark; Building 423 2800 Lyngby Denmark
| | - Maria J. York-Duran
- Department of Micro- and Nanotechnology; Center for Nanomedicine and Theranostics; DTU; Nanotech; Technical University of Denmark; Building 423 2800 Lyngby Denmark
| | - Leticia Hosta-Rigau
- Department of Micro- and Nanotechnology; Center for Nanomedicine and Theranostics; DTU; Nanotech; Technical University of Denmark; Building 423 2800 Lyngby Denmark
| |
Collapse
|
10
|
Baumann P, Spulber M, Fischer O, Car A, Meier W. Investigation of Horseradish Peroxidase Kinetics in an "Organelle-Like" Environment. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2017; 13:1603943. [PMID: 28244215 DOI: 10.1002/smll.201603943] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Revised: 01/19/2017] [Indexed: 06/06/2023]
Abstract
In order to mimic cell organelles, artificial nanoreactors have been investigated based on polymeric vesicles with reconstituted channel proteins (outer membrane protein F) and coencapsulated enzymes horseradish peroxidase (HRP) along with a crowding agent (Ficoll or polyethylene glycol) inside the cavity. Importantly, the presence of macromolecules has a strong impact on the enzyme kinetics, but no influence on the integrity of vesicles up to certain concentrations. This particular design allows for the first time the determination of HRP kinetics inside nanoreactors with crowded milieu. The values of the Michaelis-Menten constant (K m ) measured for HRP in a confined space (encapsulated in nanoreactors) in the absence of macromolecules are ≈50% lower than in free conditions, and the presence of a crowding agent results in a further pronounced decrease. These results clearly suggest that activities of enzymes in confined spaces can be tuned by varying the concentrations of crowding compounds. The present investigation represents an advance in nanoreactor design by considering the influence of environmental factors on enzymatic performance, and it demonstrates that both encapsulation and the presence of a crowding environment increase the enzyme-substrate affinity.
Collapse
Affiliation(s)
- Patric Baumann
- Department of Chemistry, University of Basel, Klingelbergstrasse 80, 4056, Basel, Switzerland
| | - Mariana Spulber
- Department of Chemistry, University of Basel, Klingelbergstrasse 80, 4056, Basel, Switzerland
| | - Ozana Fischer
- Department of Chemistry, University of Basel, Klingelbergstrasse 80, 4056, Basel, Switzerland
| | - Anja Car
- Department of Chemistry, University of Basel, Klingelbergstrasse 80, 4056, Basel, Switzerland
| | - Wolfgang Meier
- Department of Chemistry, University of Basel, Klingelbergstrasse 80, 4056, Basel, Switzerland
| |
Collapse
|
11
|
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.
Collapse
Affiliation(s)
- Yan-Ling Yang
- Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan 106, Republic of China.
| | | | | |
Collapse
|
12
|
Beltramo PJ, Van Hooghten R, Vermant J. Millimeter-area, free standing, phospholipid bilayers. SOFT MATTER 2016; 12:4324-31. [PMID: 27050618 DOI: 10.1039/c6sm00250a] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Minimal model biomembrane studies have the potential to unlock the fundamental mechanisms of cellular function that govern the processes upon which life relies. However, existing methods to fabricate free-standing model membranes currently have significant limitations. Bilayer sizes are often tens of micrometers, decoupling curvature or substrate effects, orthogonal control over tension, and solvent exchange combined with microscopy techniques is not possible, which restricts the studies that can be performed. Here, we describe a versatile platform to generate free standing, planar, phospholipid bilayers with millimeter scale areas. The technique relies on an adapted thin-film balance apparatus allowing for the dynamic control of the nucleation and growth of a planar black lipid membrane in the center of an orifice surrounded by microfluidic channels. Success is demonstrated using several different lipid types, including mixtures that show the same temperature dependent phase separation as existing protocols, moreover, membranes are highly stable. Two advantages unique to the proposed method are the dynamic control of the membrane tension and the possibility to make extremely large area membranes. We demonstrate this by showing how a block polymer, F68, used in drug delivery increases the membrane compliance. Together, the results demonstrate a new paradigm for studying the mechanics, structure, and function of model membranes.
Collapse
Affiliation(s)
- Peter J Beltramo
- Department of Materials, ETH Zürich, Vladimir-Prelog-Weg 5, 8093 Zürich, Switzerland.
| | - Rob Van Hooghten
- Department of Chemical Engineering, KU Leuven, Celestijnenlaan 200F, 3001 Heverlee, Belgium
| | - Jan Vermant
- Department of Materials, ETH Zürich, Vladimir-Prelog-Weg 5, 8093 Zürich, Switzerland.
| |
Collapse
|
13
|
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
| |
Collapse
|
14
|
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.
Collapse
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
| |
Collapse
|
15
|
Deleu M, Crowet JM, Nasir MN, Lins L. Complementary biophysical tools to investigate lipid specificity in the interaction between bioactive molecules and the plasma membrane: A review. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2014; 1838:3171-3190. [DOI: 10.1016/j.bbamem.2014.08.023] [Citation(s) in RCA: 102] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Revised: 08/05/2014] [Accepted: 08/21/2014] [Indexed: 02/08/2023]
|
16
|
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.
Collapse
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.
| |
Collapse
|
17
|
Li Destri G, Miano F, Marletta G. Structure-rheology relationship in weakly amphiphilic block copolymer Langmuir monolayers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:3345-3353. [PMID: 24650052 DOI: 10.1021/la4043777] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The linear viscoelastic behavior in the low-frequency regime at the water/air interface of three different polystyrene-b-poly(methyl methacrylate) (PS-b-PMMA) copolymer monolayers, with block length ratio varying from 66-33 to 50-50 and 25-75 in molecular units, was studied and related to the interfacial behavior, characterized by means of Langmuir isotherms, and their structure, characterized by means of the atomic force microscopy technique. The two monolayers with the highest PMMA amount showed a single phase transition at about 12 mN/m, the viscoelastic behavior changing from a predominantly elastic to a viscoelastic one. This change in the viscoelastic properties was ascribed to the beginning of entanglement among the PMMA coronas of the predominantly circular quasi-2D micelles formed by the two copolymer systems. Conversely, the polymer with the lowest PMMA amount, despite having the same PMMA block length of the PS-PMMA 50-50 block copolymer, was found to behave as a viscoelastic system at any surface pressure value. This characteristic behavior cannot therefore be simply related to the molecular weight difference, but it has been put in connection to the irregular micelle structure observed in this case, consisting of a mixture of spherical and wormlike micelles, and to the different conformation adopted by the PMMA block. By blending this copolymer with an immiscible elastic homopolymer, namely poly(2-vinylpyridine), it was possible to tune the micelle nanostructure, obtaining regular circular quasi-2D micelles, with viscoelastic properties as expected for the PMMA-rich copolymer monolayers. To the best of our knowledge, this study shows for the first time the explicit dependence upon the relative block length and, in turn, upon the nanostructure of the quasi-2D micelles, of the viscoelastic properties of Langmuir monolayers and suggests that molecular weight and intermolecular interactions are not the only parameters governing the polymer conformation and, in turn, the polymer rheology and dynamics in quasi-2D confined systems.
Collapse
Affiliation(s)
- Giovanni Li Destri
- Laboratory for Molecular Surfaces and Nanotechnology (LAMSUN), Department of Chemistry, University of Catania and CSGI , V.le A Doria 6, 95125 Catania, Italy
| | | | | |
Collapse
|
18
|
Olubummo A, Schulz M, Schöps R, Kressler J, Binder WH. Phase changes in mixed lipid/polymer membranes by multivalent nanoparticle recognition. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:259-267. [PMID: 24359326 DOI: 10.1021/la403763v] [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
Selective addressing of membrane components in complex membrane mixtures is important for many biological processes. The present paper investigates the recognition between multivalent surface functionalized nanoparticles (NPs) and amphiphilic block copolymers (BCPs), which are successfully incorporated into lipid membranes. The concept involves the supramolecular recognition between hybrid membranes (composed of a mixture of a lipid (DPPC or DOPC), an amphiphilic triazine-functionalized block copolymer TRI-PEO13-b-PIB83 (BCP 2), and nonfunctionalized BCPs (PEO17-b-PIB87 BCP 1)) with multivalent (water-soluble) nanoparticles able to recognize the triazine end group of the BCP 2 at the membrane surface via supramolecular hydrogen bonds. CdSe-NPs bearing long PEO47-thymine (THY) polymer chains on their surface specifically interacted with the 2,4-diaminotriazine (TRI) moiety of BCP 2 embedded within hybrid lipid/BCP mono- or bilayers. Experiments with GUVs from a mixture of DPPC/BCP 2 confirm selective supramolecular recognition between the THY-functionalized NPs and the TRI-functionalized polymers, finally resulting in the selective removal of BCP 2 from the hybrid vesicle membrane as proven via facetation of the originally round and smooth vesicles. GUVs (composed of DOPC/BCP 2) show that a selective removal of the polymer component from the fluid hybrid membrane results in destruction of hybrid vesicles via membrane rupture. Adsorption experiments with mixed monolayers from lipids with either BCP 2 or BCP 1 (nonfunctionalized) reveal that the THY-functionalized NPs specifically recognize BCP 2 at the air/water interface by inducing significantly higher changes in the surface pressure when compared to monolayers from nonspecifically interacting lipid/BCP 1 mixtures. Thus, recognition of multivalent NPs with specific membrane components of hybrid lipid/BCP mono- and bilayers proves the selective removal of BCPs from mixed membranes, in turn inducing membrane rupture. Such recognition events display high potential in controlling permeability and fluidity of membranes (e.g., in pharmaceutics).
Collapse
Affiliation(s)
- Adekunle Olubummo
- Chair of Macromolecular Chemistry, Faculty of Natural Sciences II (Chemistry, Physics and Mathematics), Institute of Chemistry, Martin-Luther University Halle-Wittenberg , D-06120 Halle (Saale), Germany
| | | | | | | | | |
Collapse
|
19
|
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
| |
Collapse
|
20
|
Tanner P, Balasubramanian V, Palivan CG. Aiding nature's organelles: artificial peroxisomes play their role. NANO LETTERS 2013; 13:2875-83. [PMID: 23647405 DOI: 10.1021/nl401215n] [Citation(s) in RCA: 100] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
A major goal in medical research is to develop artificial organelles that can implant in cells to treat pathological conditions or to support the design of artificial cells. Several attempts have been made to encapsulate or entrap enzymes, proteins, or mimics in polymer compartments, but only few of these nanoreactors were active in cells, and none was proven to mimic a specific natural organelle. Here, we show the necessary steps for the development of an artificial organelle mimicking a natural organelle, the peroxisome. The system, based on two enzymes that work in tandem in polymer vesicles, with a membrane rendered permeable by inserted channel proteins was optimized in terms of natural peroxisome properties and function. The uptake, absence of toxicity, and in situ activity in cells exposed to oxidative stress demonstrated that the artificial peroxisomes detoxify superoxide radicals and H2O2 after endosomal escape. Our artificial peroxisome combats oxidative stress in cells, a factor in various pathologies (e.g., arthritis, Parkinson's, cancer, AIDS), and offers a versatile strategy to develop other "cell implants" for cell dysfunction.
Collapse
Affiliation(s)
- Pascal Tanner
- Department of Chemistry, University of Basel, Klingelbergstrasse 80, CH-4056 Basel, Switzerland
| | | | | |
Collapse
|
21
|
Pippa N, Merkouraki M, Pispas S, Demetzos C. DPPC:MPOx chimeric advanced Drug Delivery nano Systems (chi-aDDnSs): Physicochemical and structural characterization, stability and drug release studies. Int J Pharm 2013; 450:1-10. [DOI: 10.1016/j.ijpharm.2013.03.052] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2013] [Revised: 03/21/2013] [Accepted: 03/28/2013] [Indexed: 01/11/2023]
|
22
|
Olubummo A, Schulz M, Lechner BD, Scholtysek P, Bacia K, Blume A, Kressler J, Binder WH. Controlling the localization of polymer-functionalized nanoparticles in mixed lipid/polymer membranes. ACS NANO 2012; 6:8713-27. [PMID: 22950802 DOI: 10.1021/nn3023602] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Surface hydrophobicity plays a significant role in controlling the interactions between nanoparticles and lipid membranes. In principle, a nanoparticle can be encapsulated into a liposome, either being incorporated into the hydrophobic bilayer interior or trapped within the aqueous vesicle core. In this paper, we demonstrate the preparation and characterization of polymer-functionalized CdSe NPs, tuning their interaction with mixed lipid/polymer membranes from 1,2-dipalmitoyl-sn-glycero-3-phophocholine and PIB(87)-b-PEO(17) block copolymer by varying their surface hydrophobicity. It is observed that hydrophobic PIB-modified CdSe NPs can be selectively located within polymer domains in a mixed lipid/polymer monolayer at the air/water interface, changing their typical domain morphologies, while amphiphilic PIB-PEO-modified CdSe NPs showed no specific localization in phase-separated lipid/polymer films. In addition, hydrophilic water-soluble CdSe NPs can readily adsorb onto spread monolayers, showing a larger effect on the molecule packing at the air/water interface in the case of pure lipid films compared to mixed monolayers. Furthermore, the incorporation of PIB-modified CdSe NPs into hybrid lipid/polymer GUVs is demonstrated with respect to the prevailing phase state of the hybrid membrane. Monitoring fluorescent-labeled PIB-CdSe NPs embedded into phase-separated vesicles, it is demonstrated that they are enriched in one specific phase, thus probing their selective incorporation into the hydrophobic portion of PIB(87)-b-PEO(17) BCP-rich domains. Thus, the formation of biocompatible hybrid GUVs with selectively incorporated nanoparticles opens a new perspective for subtle engineering of membranes together with their (nano-) phase structure serving as a model system in designing functional nanomaterials for effective nanomedicine or drug delivery.
Collapse
Affiliation(s)
- Adekunle Olubummo
- Macromolecular Chemistry, Institute of Chemistry, Faculty of Natural Sciences II (Chemistry, Physics and Mathematics), Martin-Luther University Halle-Wittenberg, D-06120 Halle (Saale), Germany
| | | | | | | | | | | | | | | |
Collapse
|
23
|
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]
|
24
|
Thoma J, Belegrinou S, Rossbach P, Grzelakowski M, Kita-Tokarczyk K, Meier W. Membrane protein distribution in composite polymer-lipid thin films. Chem Commun (Camb) 2012; 48:8811-3. [PMID: 22836593 DOI: 10.1039/c2cc32851h] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We present a model system to demonstrate that the positioning of biomolecules (membrane proteins) in a nonnative, complex thin film environment can be regulated by the phase behavior of film components. Partial separation between an amphiphilic polymer and a lipid drives the protein to a fluid phase, mechanically more similar to a cellular bilayer.
Collapse
Affiliation(s)
- Johannes Thoma
- Swiss Nanoscience Institute, University of Basel, Klingelbergstr. 82, 4056 Basel, Switzerland
| | | | | | | | | | | |
Collapse
|
25
|
Hazer DB, Kılıçay E, Hazer B. Poly(3-hydroxyalkanoate)s: Diversification and biomedical applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2012. [DOI: 10.1016/j.msec.2012.01.021] [Citation(s) in RCA: 122] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
26
|
Amado E, Kressler J. Interactions of amphiphilic block copolymers with lipid model membranes. Curr Opin Colloid Interface Sci 2011. [DOI: 10.1016/j.cocis.2011.07.003] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
|
27
|
Jagoda A, Ketikidis P, Zinn M, Meier W, Kita-Tokarczyk K. Interactions of biodegradable poly([R]-3-hydroxy-10-undecenoate) with 1,2-dioleoyl-sn-glycero-3-phosphocholine lipid: a monolayer study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:10878-10885. [PMID: 21749038 DOI: 10.1021/la201654d] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Polyhydroxyalkanoates (PHAs) are biodegradable, biocompatible polyesters and very attractive candidates for biomedical applications as materials for tissue engineering. They have a hydrophobic character, but some are able to spread at the air-water interface to form monomolecularly thin films (Langmuir monolayers). This is a very convenient model to analyze PHA self-assembly in two dimensions and to study their molecular interactions with other amphiphilic compounds, which is very important considering compatibility between biomaterials and cell membranes. We used the Langmuir monolayer technique and Brewster angle microscopy to study the properties of poly([R]-3-hydroxy-10-undecenoate) (PHUE) films on the free water surface in various experimental conditions. Moreover, we investigated the interactions between the polymer and one of the main biomembrane components, 1,2-dioleoyl-sn-glycero-3-phosphocholine (DOPC). The addition of lipid to a polymer film does not change the monolayer phase behavior; however, the interactions between these two materials are repulsive and fall in two composition-dependent regimes. In summary, this is the first systematic study of the monolayer behavior of PHUE, thus forming a solid basis for a thorough understanding of material interactions, in particular in the context of biomaterials and implants.
Collapse
Affiliation(s)
- Agnieszka Jagoda
- Department of Chemistry, University of Basel, Klingelbergstrasse 80, 4056 Basel, Switzerland
| | | | | | | | | |
Collapse
|
28
|
Egli S, Nussbaumer MG, Balasubramanian V, Chami M, Bruns N, Palivan C, Meier W. Biocompatible Functionalization of Polymersome Surfaces: A New Approach to Surface Immobilization and Cell Targeting Using Polymersomes. J Am Chem Soc 2011; 133:4476-83. [DOI: 10.1021/ja110275f] [Citation(s) in RCA: 157] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Stefan Egli
- Department of Chemistry, University of Basel, Klingelbergstrasse 80, 4056 Basel, Switzerland
| | - Martin G. Nussbaumer
- Department of Chemistry, University of Basel, Klingelbergstrasse 80, 4056 Basel, Switzerland
| | | | - Mohamed Chami
- Centre for Cellular Imaging and Nano Analytics, Biozentrum, University of Basel, Mattenstrasse 26, 4058 Basel, Switzerland
| | - Nico Bruns
- Department of Chemistry, University of Basel, Klingelbergstrasse 80, 4056 Basel, Switzerland
| | - Cornelia Palivan
- Department of Chemistry, University of Basel, Klingelbergstrasse 80, 4056 Basel, Switzerland
| | - Wolfgang Meier
- Department of Chemistry, University of Basel, Klingelbergstrasse 80, 4056 Basel, Switzerland
| |
Collapse
|
29
|
Tanner P, Onaca O, Balasubramanian V, Meier W, Palivan CG. Enzymatic cascade reactions inside polymeric nanocontainers: a means to combat oxidative stress. Chemistry 2011; 17:4552-60. [PMID: 21365697 DOI: 10.1002/chem.201002782] [Citation(s) in RCA: 114] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2010] [Revised: 12/06/2010] [Indexed: 11/11/2022]
Abstract
Oxidative stress, which is primarily due to an imbalance in reactive oxygen species, such as superoxide radicals, peroxynitrite, or hydrogen peroxide, represents a significant initiator in pathological conditions that range from arthritis to cancer. Herein we introduce the concept of enzymatic cascade reactions inside polymeric nanocontainers as an effective means to detect and combat superoxide radicals. By simultaneously encapsulating a set of enzymes that act in tandem inside the cavities of polymeric nanovesicles and by reconstituting channel proteins in their membranes, an efficient catalytic system was formed, as demonstrated by fluorescence correlation spectroscopy and fluorescence cross-correlation spectroscopy. Superoxide dismutase and lactoperoxidase were selected as a model to highlight the combination of enzymes. These were shown to participate in sequential reactions in situ in the nanovesicle cavity, transforming superoxide radicals to molecular oxygen and water and, therefore, mimicking their natural behavior. A channel protein, outer membrane protein F, facilitated the diffusion of lactoperoxidase substrate/products and dramatically increased the penetration of superoxide radicals through the polymer membrane, as established by activity assays. The system remained active after uptake by THP-1 cells, thus behaving as an artificial organelle and exemplifying an effective approach to enzyme therapy.
Collapse
Affiliation(s)
- Pascal Tanner
- Department of Chemistry, University of Basel, Klingelbergstrasse 80, 4056 Basel, Switzerland
| | | | | | | | | |
Collapse
|
30
|
Dezi M, Fribourg PF, Cicco AD, Jault JM, Chami M, Lévy D. Binding, reconstitution and 2D crystallization of membrane or soluble proteins onto functionalized lipid layer observed in situ by reflected light microscopy. J Struct Biol 2010; 174:307-14. [PMID: 21163357 DOI: 10.1016/j.jsb.2010.12.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2010] [Revised: 12/06/2010] [Accepted: 12/08/2010] [Indexed: 12/20/2022]
Abstract
Monolayer of functionalized lipid spread at the air/water interface is used for the structural analysis of soluble and membrane proteins by electron crystallography and single particle analysis. This powerful approach lacks of a method for the screening of the binding of proteins to the surface of the lipid layer. Here, we described an optical method based on the use of reflected light microscopy to image, without the use of any labeling, the lipid layer at the surface of buffers in the Teflon wells used for 2D crystallization. Images revealed that the lipid layer was made of a monolayer coexisting with liposomes or aggregates of lipids floating at the surface. Protein binding led to an increase of the contrast and the decrease of the fluidity of the lipid surface, as demonstrated with the binding of soluble Shiga toxin B subunit, of purple membrane and of solubilized His-BmrA, a bacterial ABC transporter. Moreover the reconstitution of membrane proteins bound to the lipidic surface upon detergent removal can be followed through the appearance of large recognizable domains at the surface. Proteins binding and reconstitution were further confirmed by electron microcopy. Overall, this method provides a quick evaluation of the monolayer trials, a significant reduction in screening by transmission electron microscopy and new insights in the proteins binding and 2D crystallogenesis at the lipid surface.
Collapse
Affiliation(s)
- Manuela Dezi
- Institut Curie, Centre de Recherche, Paris F-75231, France
| | | | | | | | | | | |
Collapse
|
31
|
Taking another look with fluorescence microscopy: Image processing techniques in Langmuir monolayers for the twenty-first century. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2010; 1798:1289-300. [DOI: 10.1016/j.bbamem.2010.01.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2009] [Revised: 12/11/2009] [Accepted: 01/05/2010] [Indexed: 12/15/2022]
|