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Yorulmaz Avsar S, Kyropoulou M, Di Leone S, Schoenenberger CA, Meier WP, Palivan CG. Biomolecules Turn Self-Assembling Amphiphilic Block Co-polymer Platforms Into Biomimetic Interfaces. Front Chem 2019; 6:645. [PMID: 30671429 PMCID: PMC6331732 DOI: 10.3389/fchem.2018.00645] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Accepted: 12/11/2018] [Indexed: 12/29/2022] Open
Abstract
Biological membranes constitute an interface between cells and their surroundings and form distinct compartments within the cell. They also host a variety of biomolecules that carry out vital functions including selective transport, signal transduction and cell-cell communication. Due to the vast complexity and versatility of the different membranes, there is a critical need for simplified and specific model membrane platforms to explore the behaviors of individual biomolecules while preserving their intrinsic function. Information obtained from model membrane platforms should make invaluable contributions to current and emerging technologies in biotechnology, nanotechnology and medicine. Amphiphilic block co-polymers are ideal building blocks to create model membrane platforms with enhanced stability and robustness. They form various supramolecular assemblies, ranging from three-dimensional structures (e.g., micelles, nanoparticles, or vesicles) in aqueous solution to planar polymer membranes on solid supports (e.g., polymer cushioned/tethered membranes,) and membrane-like polymer brushes. Furthermore, polymer micelles and polymersomes can also be immobilized on solid supports to take advantage of a wide range of surface sensitive analytical tools. In this review article, we focus on self-assembled amphiphilic block copolymer platforms that are hosting biomolecules. We present different strategies for harnessing polymer platforms with biomolecules either by integrating proteins or peptides into assemblies or by attaching proteins or DNA to their surface. We will discuss how to obtain synthetic structures on solid supports and their characterization using different surface sensitive analytical tools. Finally, we highlight present and future perspectives of polymer micelles and polymersomes for biomedical applications and those of solid-supported polymer membranes for biosensing.
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Christie D, Register RA, Priestley RD. Direct Measurement of the Local Glass Transition in Self-Assembled Copolymers with Nanometer Resolution. ACS CENTRAL SCIENCE 2018; 4:504-511. [PMID: 29721533 PMCID: PMC5920610 DOI: 10.1021/acscentsci.8b00043] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Indexed: 05/07/2023]
Abstract
Nanoscale compositional heterogeneity in block copolymers can impart synergistic property combinations, such as stiffness and toughness. However, until now, there has been no experimental method to locally probe the dynamics at a specific location within these structured materials. Here, this was achieved by incorporating pyrene-bearing monomers at specific locations along the polymer chain, allowing the labeled monomers' local environment to be interrogated via fluorescence. In lamellar-forming poly(butyl methacrylate-b-methyl methacrylate) diblock copolymers, a strong gradient in glass transition temperature, Tg, of the higher-Tg block, 42 K over 4 nm, was mapped with nanometer resolution. These measurements also revealed a strongly asymmetric influence of the domain interface on Tg, with a much smaller dynamic gradient being observed for the lower-Tg block.
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Affiliation(s)
- Dane Christie
- Department
of Chemical and Biological Engineering, Princeton Institute for the Science
and Technology of Materials, Princeton University, Princeton, New Jersey 08544, United States
| | - Richard A. Register
- Department
of Chemical and Biological Engineering, Princeton Institute for the Science
and Technology of Materials, Princeton University, Princeton, New Jersey 08544, United States
- E-mail:
| | - Rodney D. Priestley
- Department
of Chemical and Biological Engineering, Princeton Institute for the Science
and Technology of Materials, Princeton University, Princeton, New Jersey 08544, United States
- E-mail:
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Kulthe SS, Choudhari YM, Inamdar NN, Mourya V. Polymeric micelles: authoritative aspects for drug delivery. Des Monomers Polym 2012. [DOI: 10.1080/1385772x.2012.688328] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
Affiliation(s)
- Sushant S. Kulthe
- a Government College of Pharmacy , Aurangabad , 431005 , Maharashtra , India
| | - Yogesh M. Choudhari
- a Government College of Pharmacy , Aurangabad , 431005 , Maharashtra , India
| | - Nazma N. Inamdar
- a Government College of Pharmacy , Aurangabad , 431005 , Maharashtra , India
| | - Vishnukant Mourya
- a Government College of Pharmacy , Aurangabad , 431005 , Maharashtra , India
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Stubenrauch K, Voets I, Fritz‐Popovski G, Trimmel G. pH and ionic strength responsive polyelectrolyte block copolymer micelles prepared by ring opening metathesis polymerization. ACTA ACUST UNITED AC 2009. [DOI: 10.1002/pola.23229] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Kurt Stubenrauch
- Institute for Chemistry and Technology of Materials, Graz University of Technology, 8010 Graz, Austria
| | - Ilja Voets
- Laboratory of Physical Chemistry and Colloid Science, Wageningen University, 6703 HB Wageningen, The Netherlands
| | | | - Gregor Trimmel
- Institute for Chemistry and Technology of Materials, Graz University of Technology, 8010 Graz, Austria
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Kríz J, Dybal J, Budka J, Makrlík E. NMR and theoretical study of the cooperative interaction of hydrated proton with dibenzo-24-crown-8. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2008; 46:1015-1024. [PMID: 18781704 DOI: 10.1002/mrc.2306] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Interaction of hydrated protons (HPs) with dibenzo-24-crown-8 (DBC in nitrobenzene-d(5) was studied by (1)H and (13)C NMR under assistance of ab initio-density functional theory (DFT) quantum calculations. HPs were afforded by hydrogen bis(1,2-dicarbollyl) cobaltate (HDCC) with 3.5 M excess of H(2)O. The forming of a complex between HP and DBC leads to marked and additive relative shifts of both (1)H and (13)C signals. This was utilized for the estimation of the stabilization constant K of the complex. Its value is at least 10(6) l/mol, which agrees with the result of independent extraction method (log K = 6.3). Using absolute integral intensities of the HP signal in a water-saturated system, it was shown that the form of HP present in the complex must be H(5)O(2)(+), in accord with formerly published structure of the complex in crystalline form. The investigation of the dynamics of exchange between bound and free DBC by transverse relaxation using variably spaced pulses in the Carr-Purcell-Meiboom-Gill (CPMG) sequence or on-resonance rotating-frame relaxation with variable spin-lock field intensity was partly hampered by the fast relaxation of some signals in the complex because of relative immobilization of its internal motions. In order to remove these effects, a pulse sequence dipolar interaction-free transverse relaxation (DIFTRE) for static DIFTRE was devised and the MLEV17 pulse sequence with high intensity of electromagnetic field was used in a separate series of experiments. Using the results of these latter experiments, the correlation time of exchange was established to be about 0.8 ms, which complied with the shape of the spectra. The accompanying ab initio DFT calculations showed that the apparent symmetry of the molecules of both DBC and its complex with H(5)O(2)(+) was probably the result of averaging of energetically close conformations (five for DBC and four for the complex). Both NMR and the calculations show that the basic mode of binding of the ion in the complex is analogous to that found in crystal but the most pronounced conformation is slightly different.
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Affiliation(s)
- Jaroslav Kríz
- Institute of Macromolecular Chemistry AS CR, v. v. i., Heyrovského Sq. 2, 16206 Prague, Czech Republic.
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Pechar M, Brus J, Kostka L, Konák C, Urbanová M, Slouf M. Thermoresponsive self-assembly of short elastin-like polypentapeptides and their poly(ethylene glycol) derivatives. Macromol Biosci 2007; 7:56-69. [PMID: 17238231 DOI: 10.1002/mabi.200600196] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Short polypeptides with four pentad repeats, (VPGVG)(4) and (VPAVG)(4), were synthesised by manual fluorenylmethoxycarbonyl/tert-butyl (Fmoc/t-Bu) solid phase peptide synthesis using a convergent approach. In the next step, the peptides were coupled via their N-terminus with activated semi-telechelic poly(ethylene glycol) O-(N-Fmoc-2-aminoethyl)-O'-(2-carboxyethyl)undeca(ethylene glycol) (Fmoc-PEG-COOH) to yield monodisperse Fmoc-PEG-peptide diblock copolymer. Both the presence of the terminal hydrophobic Fmoc group and the hydrophilic PEG chain in the copolymers were shown to play a crucial role in their self-associative behaviour, leading to reversible formation of supramolecular thermoresponsive assemblies. The peptides and their PEG derivatives were characterised by HPLC, NMR and MALDI-TOF MS. The associative behaviour of the peptides and their PEG derivatives was studied by dynamic light scattering, MAS NMR and phase contrast microscopy. [image: see text]
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Affiliation(s)
- Michal Pechar
- Institute of Macromolecular Chemistry, Academy of Sciences of Czech Republic, 162 06 Prague 6, Czech Republic.
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Kríz J, Plestil J, Pospísil H, Kadlec P, Konák C, Almásy L, Kuklin AI. (1)H NMR and small-angle neutron scattering investigation of the structure and solubilization behavior of three-layer nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2004; 20:11255-11263. [PMID: 15568883 DOI: 10.1021/la0481849] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Three-layer nanoparticles were prepared by radiation-induced polymerization of 1-10 g/L of methyl methacrylate dissolved in a 0.1 wt % D(2)O solution of polystyrene-poly(methacrylic acid) (PS-PMA) micelles. According to NMR and small-angle neutron scattering (SANS), most of the poly(methyl methacrylate) (PMMA) is adsorbed at the core-shell interface of the particles. A small fraction of shorter PMMA probably sticks to outer parts of the PMA chains. The absorption kinetics and equilibria of benzene and chloroform were studied by NMR and SANS time-resolved experiments. The diffusion front in the PS core is very narrow but quite broad in the PMMA sheet suggesting, thus, a less compact state of PMMA. According to SANS, the diffusion kinetics is almost independent of the PMMA sheet thickness. In contrast to it, the absorption capacity, reflected by both SANS and NMR, increases markedly with the PMMA content in the particle. The maximum amount of solubilized compound depends on its positive interaction with PMMA (expressed by the chi parameter) but is restricted by the growing interface tension between swollen PMMA and D(2)O. In accordance with this conclusion, a particle saturated with benzene can absorb chloroform only at the expense of a part of benzene expelled into the surrounding medium and vice versa. Starting with 10 g PMMA/L (10 times the weight of the original micelles), the particles become unstable when being swollen with a good solvent.
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Affiliation(s)
- Jaroslav Kríz
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovský Sq. 2, 162 06 Prague 6, Czech Republic.
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Gao L, Shi L, An Y, Zhang W, Shen X, Guo S, He B. Formation of spindlelike aggregates and flowerlike arrays of polystyrene-b-poly(acrylic acid) micelles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2004; 20:4787-90. [PMID: 15984229 DOI: 10.1021/la0358116] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
In this letter we describe a simple physical method for the ordered aggregation of scattered single spherical polystyrene-b-poly(acrylic acid) (PS-b-PAA) micelles. First, narrow dispersed spindlelike aggregates, about 60 nm in diameter and 1.5 microm in length, are obtained from the aggregation of single spherical PS-b-PAA micelles at 0 degrees C on a glass slide. Then, the yielding spindlelike units can further aggregate into long-ranged, close-packed, flowerlike arrays after a given amount of freeze-thaw cycles. The formation of the interesting arrays is ascribed to the templated aggregation of micelles on the water polycrystal at the freezing point.
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Ravi P, Wang C, Tam KC, Gan LH. Association Behavior of Poly(methacrylic acid)-block-poly(methyl methacrylate) in Aqueous Medium: Potentiometric and Laser Light Scattering Studies. Macromolecules 2002. [DOI: 10.1021/ma021302j] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- P. Ravi
- Singapore-MIT Alliance, School of Mechanical and Production Engineering, Natural Sciences, National Institute of Education, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798
| | - C. Wang
- Singapore-MIT Alliance, School of Mechanical and Production Engineering, Natural Sciences, National Institute of Education, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798
| | - K. C. Tam
- Singapore-MIT Alliance, School of Mechanical and Production Engineering, Natural Sciences, National Institute of Education, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798
| | - L. H. Gan
- Singapore-MIT Alliance, School of Mechanical and Production Engineering, Natural Sciences, National Institute of Education, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798
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Kříž J, Dautzenberg H. Cooperative Interactions of Unlike Macromolecules 2: NMR and Theoretical Study of Electrostatic Binding of Sodium Poly(styrenesulfonate)s to Copolymers with Variably Distributed Cationic Groups. J Phys Chem A 2001. [DOI: 10.1021/jp003403u] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- J. Kříž
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, 162 06 Prague 6, Czech Republic, and Max-Planck-Institute for Colloid and Interface Research, Teltow, Germany
| | - H. Dautzenberg
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, 162 06 Prague 6, Czech Republic, and Max-Planck-Institute for Colloid and Interface Research, Teltow, Germany
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Zhang G, Niu A, Peng S, Jiang M, Tu Y, Li M, Wu C. Formation of novel polymeric nanoparticles. Acc Chem Res 2001; 34:249-56. [PMID: 11263883 DOI: 10.1021/ar000011x] [Citation(s) in RCA: 139] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We have found that not only block copolymers but also ionomers can self-assemble in a selective solvent to form surfactant-free nanoparticles. The self-assembly can be induced by chemical reaction, polymer-polymer complexation, and microphase inversion in addition to the temperature. A recently developed microwave method for the preparation of uniform surfactant-free polymeric nanoparticles is also reviewed. Our results have revealed that for a given dispersion, the particle surface area occupied per stabilizer (surfactant, polymer chains, and ionic groups) is close to a constant.
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Affiliation(s)
- G Zhang
- The Open Laboratory for Bond-Selective Chemistry, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
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Tu Y, Wan X, Zhang D, Zhou Q, Wu C. Self-Assembled Nanostructure of a Novel Coil−Rod Diblock Copolymer in Dilute Solution. J Am Chem Soc 2000. [DOI: 10.1021/ja002163t] [Citation(s) in RCA: 173] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yingfeng Tu
- Contribution from the Department of Chemistry, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, Department of Polymer Science & Engineering, College of Chemistry, Peking University, Beijing 100871, China, and The Open Laboratory of Bond Selective Chemistry, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Xinhua Wan
- Contribution from the Department of Chemistry, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, Department of Polymer Science & Engineering, College of Chemistry, Peking University, Beijing 100871, China, and The Open Laboratory of Bond Selective Chemistry, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Dong Zhang
- Contribution from the Department of Chemistry, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, Department of Polymer Science & Engineering, College of Chemistry, Peking University, Beijing 100871, China, and The Open Laboratory of Bond Selective Chemistry, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Qifeng Zhou
- Contribution from the Department of Chemistry, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, Department of Polymer Science & Engineering, College of Chemistry, Peking University, Beijing 100871, China, and The Open Laboratory of Bond Selective Chemistry, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Chi Wu
- Contribution from the Department of Chemistry, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, Department of Polymer Science & Engineering, College of Chemistry, Peking University, Beijing 100871, China, and The Open Laboratory of Bond Selective Chemistry, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
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Kříž J, Brus J, Pleštil J, Kurková D, Masař B, Dybal J, Zune C, Jerôme R. Polymer Dynamics in an Interface-Confined Space: NMR Study of Poly(hexyl ethacrylate)-block-poly(acrylic acid) and Poly(dodecyl methacrylate)-block-poly(acrylic acid) Micelles in D2O. Macromolecules 2000. [DOI: 10.1021/ma991640t] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Kříž J, Kurková D, Kadlec P, Tuzar Z, Pleštil J. Interface Polymerization in a Polymer Micelle: An NMR Study of the Radical Polymerization of Methyl Methacrylate at the Core−Shell Interface of Polystyrene-block-poly(methacrylic acid) Micelles. Macromolecules 2000. [DOI: 10.1021/ma991368n] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- J. Kříž
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Sq.2, 162 06 Prague 6, Czech Republic
| | - D. Kurková
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Sq.2, 162 06 Prague 6, Czech Republic
| | - P. Kadlec
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Sq.2, 162 06 Prague 6, Czech Republic
| | - Z. Tuzar
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Sq.2, 162 06 Prague 6, Czech Republic
| | - J. Pleštil
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Sq.2, 162 06 Prague 6, Czech Republic
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