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Khandai S, Siegel RA, Jena SS. Probing the microenvironment of polyacrylamide hydrogel matrix using turbidity and fluorescence recovery after photobleaching: One versus Two phases. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.124618] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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2
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Saalwächter K, Seiffert S. Dynamics-based assessment of nanoscopic polymer-network mesh structures and their defects. SOFT MATTER 2018; 14:1976-1991. [PMID: 29504001 DOI: 10.1039/c7sm02444d] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Polymer-network gels often exhibit complex nanoscopic architectures. First, the polymer-network mesh topology on scales of 1-10 nm is usually not uniform and regular, but disordered and irregular. Second, on top of that, many swollen polymer networks display spatial inhomogeneity of their polymer segmental density and crosslinking density on scales of 10-100 nm. This multi-scale structural complexity affects the permeability, mechanical strength, and optical clarity of the polymer gels, which is of central relevance for their performance in popular applications. As a result, there is a need to characterize the polymer network structures on multiple scales. On the scale of the spatial inhomogeneity of crosslinking, 10-100 nm, scattering of neutrons, X-rays, and light has extraordinary utility and is well established. On the scale of the mesh topology, 1-10 nm, in contrast, experimental techniques are less established. This review intends to close this gap by reviewing two intrinsically dynamic methods that yield information on polymer network mesh structures. First, NMR-based assessment of residual dipolar proton-spin couplings, which arise upon the introduction of crosslinks into a liquidlike polymer system to impart partial solidlike characteristics, is suitable to quantitatively assess network meshes and local network defects. Second, diffusive penetration of molecular, macromolecular, and mesoscopic colloidal probes through a polymer gel provides insight into its obstructing network mesh structure and its potential irregularity. Either method is highly synergistic to scattering-based assessment of the network structures on larger scales, and in concert, a rich picture on the nano- and mesoscopic gel topology is obtained.
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Affiliation(s)
- Kay Saalwächter
- Martin-Luther-University Halle-Wittenberg, Institute of Physics - NMR Group, Betty-Heimann-Str. 7, D-06120 Halle/Saale, Germany.
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3
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Watanabe N, Li X, Shibayama M. Probe Diffusion during Sol–Gel Transition of a Radical Polymerization System Using Isorefractive Dynamic Light Scattering. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b02202] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Nobuyuki Watanabe
- Institute
for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
| | - Xiang Li
- Institute
for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
| | - Mitsuhiro Shibayama
- Institute
for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
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4
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Klymenko A, Nicol E, Nicolai T, Colombani O. Effect of Self-Assembly on Probe Diffusion in Solutions and Networks of pH-Sensitive Triblock Copolymers. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b01324] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- A. Klymenko
- LUNAM Université,
Université du Maine, IMMM−UMR CNRS 6283, Université du Maine, av. O. Messiaen, 72085 Le Mans, cedex 9, France
| | - E. Nicol
- LUNAM Université,
Université du Maine, IMMM−UMR CNRS 6283, Université du Maine, av. O. Messiaen, 72085 Le Mans, cedex 9, France
| | - T. Nicolai
- LUNAM Université,
Université du Maine, IMMM−UMR CNRS 6283, Université du Maine, av. O. Messiaen, 72085 Le Mans, cedex 9, France
| | - O. Colombani
- LUNAM Université,
Université du Maine, IMMM−UMR CNRS 6283, Université du Maine, av. O. Messiaen, 72085 Le Mans, cedex 9, France
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5
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Abstract
Many polymer gels display network defects and crosslinking inhomogeneity. This review reflects and interrelates investigations on the characterization of such polymer-network heterogeneity and on its impact on the swelling, elasticity, and permeability of polymer gels.
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Affiliation(s)
- F. Di Lorenzo
- Helmholtz-Zentrum Berlin
- Soft Matter and Functional Materials
- D-14109 Berlin
- Germany
- Helmholtz Virtual Institute “Multifunctional Biomaterials for Medicine”
| | - S. Seiffert
- Helmholtz-Zentrum Berlin
- Soft Matter and Functional Materials
- D-14109 Berlin
- Germany
- Helmholtz Virtual Institute “Multifunctional Biomaterials for Medicine”
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6
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Yu Y, Chau Y. Formulation of in situ chemically cross-linked hydrogel depots for protein release: from the blob model perspective. Biomacromolecules 2014; 16:56-65. [PMID: 25314589 DOI: 10.1021/bm501063n] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The fast release rate and the undesirable covalent binding are two major problems often encountered in formulating in situ chemically cross-linked hydrogel as protein release depot, particularly when prolonged release over months is desirable. In this study, we applied the De Gennes' blob theory to analyze and tackle these two problems using a vinylsulfone-thiol (VS-SH) reaction based in situ hydrogel system. We showed that the simple scaling relation ξb ≈ Rg(c/c*)(-v/(3v-1)) is applicable to the in situ hydrogel and the mesh size estimated from the precursor polymer parameters is a reasonable match to experimental results. On the other hand, as predicted by the theory and confirmed by experiments, the drug diffusion within hydrogel depends mainly on polymer concentration but not the degree of modification (DM). The covalent binding was found to be caused by the mismatch of location between the reactive groups and the entanglement points. The mismatch and, thus, the protein binding were minimized by increasing the DM and concentration of the SH polymer relative to the VS polymer, as predicted by theory. Using these principles, an in situ hydrogel system for the controlled release of an antiangiogenic antibody therapeutics bevacizumab for 3 months was developed.
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Affiliation(s)
- Yu Yu
- Division of Biomedical Engineering and ‡Department of Chemical and Biomolecular Engineering, The Hong Kong University of Science and Technology , Clear Water Bay, Kowloon, Hong Kong, China
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7
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Forrey C, Saylor DM, Silverstein JS, Douglas JF, Davis EM, Elabd YA. Prediction and validation of diffusion coefficients in a model drug delivery system using microsecond atomistic molecular dynamics simulation and vapour sorption analysis. SOFT MATTER 2014; 10:7480-7494. [PMID: 25115846 DOI: 10.1039/c4sm01297f] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Diffusion of small to medium sized molecules in polymeric medical device materials underlies a broad range of public health concerns related to unintended leaching from or uptake into implantable medical devices. However, obtaining accurate diffusion coefficients for such systems at physiological temperature represents a formidable challenge, both experimentally and computationally. While molecular dynamics simulation has been used to accurately predict the diffusion coefficients, D, of a handful of gases in various polymers, this success has not been extended to molecules larger than gases, e.g., condensable vapours, liquids, and drugs. We present atomistic molecular dynamics simulation predictions of diffusion in a model drug eluting system that represent a dramatic improvement in accuracy compared to previous simulation predictions for comparable systems. We find that, for simulations of insufficient duration, sub-diffusive dynamics can lead to dramatic over-prediction of D. We present useful metrics for monitoring the extent of sub-diffusive dynamics and explore how these metrics correlate to error in D. We also identify a relationship between diffusion and fast dynamics in our system, which may serve as a means to more rapidly predict diffusion in slowly diffusing systems. Our work provides important precedent and essential insights for utilizing atomistic molecular dynamics simulations to predict diffusion coefficients of small to medium sized molecules in condensed soft matter systems.
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Affiliation(s)
- Christopher Forrey
- Division of Chemistry and Materials Science, Center for Devices and Radiological Health, US Food and Drug Administration, USA.
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8
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Affiliation(s)
- Fany Di Lorenzo
- Helmholtz-Zentrum Berlin; F-ISFM Soft Matter and Functional Materials; Hahn-Meitner-Platz 1 D-14109 Berlin Germany
- Institute of Chemistry and Biochemistry; Freie Universität Berlin; Takustr. 3 D-14195 Berlin Germany
- Helmholtz Virtual Institute; “Multifunctional Biomaterials for Medicine”; Kantstr. 55 D-14513 Teltow Germany
| | - Sebastian Seiffert
- Helmholtz-Zentrum Berlin; F-ISFM Soft Matter and Functional Materials; Hahn-Meitner-Platz 1 D-14109 Berlin Germany
- Institute of Chemistry and Biochemistry; Freie Universität Berlin; Takustr. 3 D-14195 Berlin Germany
- Helmholtz Virtual Institute; “Multifunctional Biomaterials for Medicine”; Kantstr. 55 D-14513 Teltow Germany
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9
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Vagias A, Košovan P, Koynov K, Holm C, Butt HJ, Fytas G. Dynamics in Stimuli-Responsive Poly(N-isopropylacrylamide) Hydrogel Layers As Revealed by Fluorescence Correlation Spectroscopy. Macromolecules 2014. [DOI: 10.1021/ma500928p] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
| | - Peter Košovan
- Institute
für Computerphysik, Universität Stuttgart, 70569 Stuttgart, Germany
- Department
of Physical and Macromolecular Chemistry, Faculty of Science, Charles University in Prague, Hlavova 8, 120 00 Praha 2, Czech Republic
| | - Kaloian Koynov
- Max-Planck-Institute for Polymer Research, 55128 Mainz, Germany
| | - Christian Holm
- Institute
für Computerphysik, Universität Stuttgart, 70569 Stuttgart, Germany
| | | | - George Fytas
- Max-Planck-Institute for Polymer Research, 55128 Mainz, Germany
- Department
of /Materials Science University of Crete and IESL-FORTH, 71110 Heraklion, Greece
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10
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Li X, Khairulina K, Chung UI, Sakai T. Migration Behavior of Rodlike dsDNA under Electric Field in Homogeneous Polymer Networks. Macromolecules 2013. [DOI: 10.1021/ma401827g] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xiang Li
- Department
of Bioengineering, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo,
Bunkyo-ku, Tokyo 113-8656, Japan
| | - Kateryna Khairulina
- Department
of Bioengineering, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo,
Bunkyo-ku, Tokyo 113-8656, Japan
| | - Ung-il Chung
- Department
of Bioengineering, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo,
Bunkyo-ku, Tokyo 113-8656, Japan
| | - Takamasa Sakai
- Department
of Bioengineering, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo,
Bunkyo-ku, Tokyo 113-8656, Japan
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11
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Pestryaev EM. Molecular-dynamics study of chain reptation in a gel. POLYMER SCIENCE SERIES A 2013. [DOI: 10.1134/s0965545x13050052] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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12
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Wu D, Feng F, Xie D, Chen Y, Tan W, Schanze KS. Helical Conjugated Polyelectrolyte Aggregation Induced by Biotin-Avidin Interaction. J Phys Chem Lett 2012; 3:1711-5. [PMID: 26285733 DOI: 10.1021/jz300452t] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Fluorescence correlation spectroscopy (FCS) is applied to demonstrate avidin-induced cross-linking in a system consisting of a helical anionic conjugated polyelectrolyte (P1) and a biotin-tetramethylrhodamine (TMR) conjugate (2). In a previous study, we used fluorescence spectroscopy to demonstrate that 2 binds to P1 via intercalation of the TMR chromophore into the P1 helix. Addition of avidin to the P1/2 complex induces little change in the fluorescence of the system; however, FCS reveals a remarkable increase in the diffusion time of the P1/2 complex in the presence of avidin. This change is attributed to supramolecular polymer aggregates produced by cross-link formation between the biotin unit of intercalated 2 and avidin. Atomic force microscopy imaging provides evidence supporting the existence of these aggregates. The highly sensitive FCS method is used to develop a novel sensor for the biotin-avidin interaction, with a detection limit of <100 pM for avidin.
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Affiliation(s)
- Danlu Wu
- Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
| | - Fude Feng
- Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
| | - Dongping Xie
- Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
| | - Yan Chen
- Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
| | - Weihong Tan
- Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
| | - Kirk S Schanze
- Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
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