1
|
Moon JD, Webber TR, Brown DR, Richardson PM, Casey TM, Segalman RA, Shell MS, Han S. Nanoscale water-polymer interactions tune macroscopic diffusivity of water in aqueous poly(ethylene oxide) solutions. Chem Sci 2024; 15:2495-2508. [PMID: 38362435 PMCID: PMC10866362 DOI: 10.1039/d3sc05377f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Accepted: 11/30/2023] [Indexed: 02/17/2024] Open
Abstract
The separation and anti-fouling performance of water purification membranes is governed by both macroscopic and molecular-scale water properties near polymer surfaces. However, even for poly(ethylene oxide) (PEO) - ubiquitously used in membrane materials - there is little understanding of whether or how the molecular structure of water near PEO surfaces affects macroscopic water diffusion. Here, we probe both time-averaged bulk and local water dynamics in dilute and concentrated PEO solutions using a unique combination of experimental and simulation tools. Pulsed-Field Gradient NMR and Overhauser Dynamic Nuclear Polarization (ODNP) capture water dynamics across micrometer length scales in sub-seconds to sub-nanometers in tens of picoseconds, respectively. We find that classical models, such as the Stokes-Einstein and Mackie-Meares relations, cannot capture water diffusion across a wide range of PEO concentrations, but that free volume theory can. Our study shows that PEO concentration affects macroscopic water diffusion by enhancing the water structure and altering free volume. ODNP experiments reveal that water diffusivity near PEO is slower than in the bulk in dilute solutions, previously not recognized by macroscopic transport measurements, but the two populations converge above the polymer overlap concentration. Molecular dynamics simulations reveal that the reduction in water diffusivity occurs with enhanced tetrahedral structuring near PEO. Broadly, we find that PEO does not simply behave like a physical obstruction but directly modifies water's structural and dynamic properties. Thus, even in simple PEO solutions, molecular scale structuring and the impact of polymer interfaces is essential to capturing water diffusion, an observation with important implications for water transport through structurally complex membrane materials.
Collapse
Affiliation(s)
- Joshua D Moon
- Materials Department, University of California Santa Barbara California 93106 USA
- Department of Chemical Engineering, University of California Santa Barbara California 93106 USA
| | - Thomas R Webber
- Department of Chemical Engineering, University of California Santa Barbara California 93106 USA
| | - Dennis Robinson Brown
- Department of Chemical Engineering, University of California Santa Barbara California 93106 USA
| | - Peter M Richardson
- Materials Department, University of California Santa Barbara California 93106 USA
| | - Thomas M Casey
- Department of Chemistry and Biochemistry, University of California Santa Barbara California 93106 USA
| | - Rachel A Segalman
- Materials Department, University of California Santa Barbara California 93106 USA
- Department of Chemical Engineering, University of California Santa Barbara California 93106 USA
| | - M Scott Shell
- Department of Chemical Engineering, University of California Santa Barbara California 93106 USA
| | - Songi Han
- Department of Chemical Engineering, University of California Santa Barbara California 93106 USA
- Department of Chemistry and Biochemistry, University of California Santa Barbara California 93106 USA
| |
Collapse
|
2
|
Huang Y, Li S, Zettle LWC, Ma Y, Naguib HE, Kumacheva E. Nanogels designed for cell-free nucleic acid sequestration. NANOSCALE 2023; 15:14531-14542. [PMID: 37609883 DOI: 10.1039/d3nr03231k] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/24/2023]
Abstract
Chronic wounds exhibit over-expression of cell-free deoxyribonucleic acid (cfDNA), leading to a prolonged inflammation and non-healing wounds. Scavenging excessive cfDNA molecules is a promising strategy for chronic wound treatment. Nanoscopic particles act as efficient cfDNA scavengers due to their large surface area, however their efficiency in cfDNA uptake was limited by adsorption solely on the nanoparticle surface. In contrast, nanogels may provide multiple cfDNA binding sites in the nanoparticle interior, however their use for cfDNA scavenging is yet to be explored. Herein, we report cationic nanogels derived from a copolymer of chitosan and poly{2-[(acryloyloxy)ethyl]trimethylammonium chloride} end-grafted to the chitosan backbone as side chains. The nanogels retain their positive charge at the pH and ionic strength of chronic wound exudate, enabling electrostatically driven cfDNA scavenging. The network structure of the nanogels leads to the cfDNA sequestration in the nanogel interior, in addition to surface attachment. A key factor in cfDNA sequestration is the ratio of the pore size of the nanogel-to-cfDNA molecular dimensions. The enhanced cfDNA scavenging efficiency, along with biocompatibility of the nanogels, makes them a promising component of dressings for chronic wound treatment.
Collapse
Affiliation(s)
- Yuhang Huang
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Ontario M5S 3E5, Canada.
| | - Shangyu Li
- Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada
| | - Logan W C Zettle
- Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada
| | - Yingshan Ma
- Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada
| | - Hani E Naguib
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Ontario M5S 3E5, Canada.
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, Ontario M5S 3G8, Canada
- Department of Materials Science and Engineering, University of Toronto, Toronto, Ontario M5S 3E4, Canada
- Institute of Biomedical Engineering, University of Toronto, Toronto, Ontario M5S 3E4, Canada
| | - Eugenia Kumacheva
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Ontario M5S 3E5, Canada.
- Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada
- Institute of Biomedical Engineering, University of Toronto, Toronto, Ontario M5S 3E4, Canada
| |
Collapse
|
3
|
Amsden BG. Hydrogel Mesh Size and Its Impact on Predictions of Mathematical Models of the Solute Diffusion Coefficient. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c01443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Brian G. Amsden
- Department of Chemical Engineering, Queen’s University, Kingston, ON, Canada K7L 3N6
| |
Collapse
|
4
|
Fan Y, Wang X, Qian X, Dixit A, Herman B, Lei Y, McCutcheon J, Li B. Enhancing the Understanding of Soil Nitrogen Fate Using a 3D-Electrospray Sensor Roll Casted with a Thin-Layer Hydrogel. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:4905-4914. [PMID: 35274533 DOI: 10.1021/acs.est.1c05661] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Accurate and continuous monitoring of soil nitrogen is critical for determining its fate and providing early warning for swift soil nutrient management. However, the accuracy of existing electrochemical sensors is hurdled by the immobility of targeted ions, ion adsorption to soil particles, and sensor reading noise and drifting over time. In this study, polyacrylamide hydrogel with a thickness of 0.45 μm was coated on the surface of solid-state ion-selective membrane (S-ISM) sensors to absorb water contained in soil and, consequently, enhance the accuracy (R2 > 0.98) and stability (drifting < 0.3 mV/h) of these sensors monitoring ammonium (NH4+) and nitrate (NO3-) ions in soil. An ion transport model was built to simulate the long-term NH4+ dynamic process (R2 > 0.7) by considering the soil adsorption process and soil complexity. Furthermore, a soil-based denoising data processing algorithm (S-DDPA) was developed based on the unique features of soil sensors including the nonlinear mass transfer and ion diffusion on the heterogeneous sensor-hydrogel-soil interface. The 14 day tests using real-world soil demonstrated the effectiveness of S-DDPA to eliminate false signals and retrieve the actual soil nitrogen information for accurate (error: <2 mg/L) and continuous monitoring.
Collapse
Affiliation(s)
- Yingzheng Fan
- Department of Civil and Environmental Engineering, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Xingyu Wang
- Department of Civil and Environmental Engineering, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Xin Qian
- Department of Chemical and Biomolecular Engineering, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Anand Dixit
- Institute of Materials Science, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Brianna Herman
- Department of Civil and Environmental Engineering, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Yu Lei
- Department of Chemical and Biomolecular Engineering, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Jeffrey McCutcheon
- Department of Chemical and Biomolecular Engineering, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Baikun Li
- Department of Civil and Environmental Engineering, University of Connecticut, Storrs, Connecticut 06269, United States
- Center for Environmental Science and Engineering, University of Connecticut, Storrs, Connecticut 06269, United States
| |
Collapse
|
5
|
Nikitin AA, Yurenya AY, Gabbasov RR, Cherepanov VM, Polikarpov MA, Chuev MA, Majouga AG, Panchenko VY, Abakumov MA. Effects of Macromolecular Crowding on Nanoparticle Diffusion: New Insights from Mössbauer Spectroscopy. J Phys Chem Lett 2021; 12:6804-6811. [PMID: 34270251 DOI: 10.1021/acs.jpclett.1c01984] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
In this work, we used Mössbauer spectroscopy as a new approach for experimental quantification of the self-diffusion coefficient (DMössbauer) and hydrodynamic (HD) size of iron-containing nanoparticles (NPs) in complex crowded solutions, mimicking cell cytoplasm. As a probe, we used 9 nm cobalt ferrite NPs (CFNs) dispersed in solutions of bovine serum albumin (BSA) with a volume fraction (φBSA) of 0-0.2. Our results show that the broadening of Mössbauer spectra is highly sensitive to the diffusion of CFNs, while when φBSA = 0.2, the CFN-normalized diffusivity is reduced by 86% compared to that of a protein-free solution. CFN colloids were also studied by dynamic light scattering (DLS). Comparison of the experimental data shows that DLS significantly underestimates the diffusion coefficient of CFNs and, consequently, overestimates the HD size of CFNs at φBSA > 0, which cannot be attributed to the formation of the BSA monolayer on the surface of CFNs.
Collapse
Affiliation(s)
- Aleksey A Nikitin
- National University of Science and Technology MISiS, Moscow 119049, Russian Federation
| | - Anton Yu Yurenya
- Lomonosov Moscow State University, Moscow 119991, Russian Federation
- National Research Centre "Kurchatov Institute", Moscow 123182, Russian Federation
| | - Raul R Gabbasov
- National Research Centre "Kurchatov Institute", Moscow 123182, Russian Federation
| | - Valeriy M Cherepanov
- National Research Centre "Kurchatov Institute", Moscow 123182, Russian Federation
| | - Mikhail A Polikarpov
- National Research Centre "Kurchatov Institute", Moscow 123182, Russian Federation
| | - Michael A Chuev
- Valiev Institute of Physics and Technology, Russian Academy of Sciences, Moscow 117218, Russian Federation
| | - Alexander G Majouga
- D. Mendeleev University of Chemical Technology of Russia, Moscow 125047, Russian Federation
| | - Vladislav Ya Panchenko
- Lomonosov Moscow State University, Moscow 119991, Russian Federation
- National Research Centre "Kurchatov Institute", Moscow 123182, Russian Federation
| | - Maxim A Abakumov
- National University of Science and Technology MISiS, Moscow 119049, Russian Federation
| |
Collapse
|
6
|
Milster S, Kim WK, Kanduč M, Dzubiella J. Tuning the permeability of regular polymeric networks by the cross-link ratio. J Chem Phys 2021; 154:154902. [PMID: 33887934 DOI: 10.1063/5.0045675] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
The amount of cross-linking in the design of polymer materials is a key parameter for the modification of numerous physical properties, importantly, the permeability to molecular solutes. We consider networks with a diamond-like architecture and different cross-link ratios, concurring with a wide range of the polymer volume fraction. We particularly focus on the effect and the competition of two independent component-specific solute-polymer interactions, i.e., we distinguish between chain-monomers and cross-linkers, which individually act on the solutes and are altered to cover attractive and repulsive regimes. For this purpose, we employ coarse-grained, Langevin computer simulations to study how the cross-link ratio of polymer networks controls the solute partitioning, diffusion, and permeability. We observe different qualitative behaviors as a function of the cross-link ratio and interaction strengths. The permeability can be tuned ranging over two orders of magnitude relative to the reference bulk permeability. Finally, we provide scaling theories for the partitioning and diffusion that explicitly account for the component-specific interactions as well as the cross-link ratio and the polymer volume fraction. These are in overall good agreement with the simulation results and grant insight into the underlying physics, rationalizing how the cross-link ratio can be exploited to tune the solute permeability of polymeric networks.
Collapse
Affiliation(s)
- Sebastian Milster
- Applied Theoretical Physics-Computational Physics, Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, D-79104 Freiburg, Germany
| | - Won Kyu Kim
- Korea Institute for Advanced Study, Seoul 02455, Republic of Korea
| | - Matej Kanduč
- Jožef Stefan Institute, SI-1000 Ljubljana, Slovenia
| | - Joachim Dzubiella
- Applied Theoretical Physics-Computational Physics, Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, D-79104 Freiburg, Germany
| |
Collapse
|
7
|
Bittermann MR, Grzelka M, Woutersen S, Brouwer AM, Bonn D. Disentangling Nano- and Macroscopic Viscosities of Aqueous Polymer Solutions Using a Fluorescent Molecular Rotor. J Phys Chem Lett 2021; 12:3182-3186. [PMID: 33759527 PMCID: PMC8041377 DOI: 10.1021/acs.jpclett.1c00512] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Accepted: 03/17/2021] [Indexed: 06/12/2023]
Abstract
The macroscopic viscosity of polymer solutions in general differs strongly from the viscosity at the nanometer scale, and the relation between the two can be complicated. To investigate this relation, we use a fluorescent molecular rotor that probes the local viscosity of its molecular environment. For a range of chain lengths and concentrations, the dependence of the fluorescence on the macroscopic viscosity is well described by the classical Förster-Hoffmann (FH) equation, but the value of the FH exponent depends on the polymer chain length. We show that all data can be collapsed onto a master curve by plotting the fluorescence versus polymer concentration, which we explain in terms of the characteristic mesh size of the polymer solution. Using known scaling laws for polymers then allows us to quantitatively explain the relation between the FH exponent and the polymer chain length, allowing us to link the nano- to the macroviscosity.
Collapse
Affiliation(s)
- Marius R. Bittermann
- Van
der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The
Netherlands
- TiFN, P.O. Box 557, 6700 AN, Wageningen, The Netherlands
| | - Marion Grzelka
- Van
der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The
Netherlands
| | - Sander Woutersen
- Van
’t Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The
Netherlands
| | - Albert M. Brouwer
- Van
’t Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The
Netherlands
| | - Daniel Bonn
- Van
der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The
Netherlands
| |
Collapse
|
8
|
Bok M, Zhao ZJ, Hwang SH, Kang HJ, Jeon S, Ko J, Jeong J, Song YS, Lim E, Jeong JH. Effective Dispensing Methods for Loading Drugs Only to the Tip of DNA Microneedles. Pharmaceutics 2020; 12:E954. [PMID: 33050428 PMCID: PMC7599544 DOI: 10.3390/pharmaceutics12100954] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 10/03/2020] [Accepted: 10/07/2020] [Indexed: 11/16/2022] Open
Abstract
Here, we propose a novel and simple method to efficiently capture the diffusion of fluorescein isothiocyanate (FITC)-dextran from a biocompatible substance and load the drug only to the tip of DNA microneedles. A dispensing and suction method was chosen to fabricate the designed microneedles with efficient amounts of FITC as the drug model. Importantly, the vacuum process, which could influence the capturing of FITC diffusion from the tip, was evaluated during the manufacturing process. In addition, the simulations were consistent with the experimental results and showed apparent diffusion. Moreover, dextrans of different molecular weights labeled with FITC were chosen to fabricate the tip of microneedles for demonstrating their applicability. Finally, a micro-jetting system with a micro-nozzle (diameter: 80 μm) was developed to achieve the accurate and rapid loading of small amounts of FITC using the anti-diffusion and micro-jetting methods. Our method not only uses a simple and fast manufacturing process, but also fabricates the tips of microneedles more efficiently with FITC compared with the existing methods. We believe that the proposed method is essential for the clinical applications of the microneedle drug delivery platform.
Collapse
Affiliation(s)
- Moonjeong Bok
- Nano-Convergence Mechanical Systems Research Division, Korea Institute of Machinery and Materials, Daejeon 34103, Korea; (M.B.); (Z.-J.Z.); (S.H.H.); (H.-J.K.); (S.J.); (J.K.)
| | - Zhi-Jun Zhao
- Nano-Convergence Mechanical Systems Research Division, Korea Institute of Machinery and Materials, Daejeon 34103, Korea; (M.B.); (Z.-J.Z.); (S.H.H.); (H.-J.K.); (S.J.); (J.K.)
| | - Soon Hyoung Hwang
- Nano-Convergence Mechanical Systems Research Division, Korea Institute of Machinery and Materials, Daejeon 34103, Korea; (M.B.); (Z.-J.Z.); (S.H.H.); (H.-J.K.); (S.J.); (J.K.)
| | - Hyeok-Joong Kang
- Nano-Convergence Mechanical Systems Research Division, Korea Institute of Machinery and Materials, Daejeon 34103, Korea; (M.B.); (Z.-J.Z.); (S.H.H.); (H.-J.K.); (S.J.); (J.K.)
| | - Sohee Jeon
- Nano-Convergence Mechanical Systems Research Division, Korea Institute of Machinery and Materials, Daejeon 34103, Korea; (M.B.); (Z.-J.Z.); (S.H.H.); (H.-J.K.); (S.J.); (J.K.)
| | - Jiwoo Ko
- Nano-Convergence Mechanical Systems Research Division, Korea Institute of Machinery and Materials, Daejeon 34103, Korea; (M.B.); (Z.-J.Z.); (S.H.H.); (H.-J.K.); (S.J.); (J.K.)
| | - Jiwon Jeong
- Department of Fiber System Engineering, Dankook University, Yongin 448-701, Korea; (J.J.); (Y.S.S.)
| | - Young Seok Song
- Department of Fiber System Engineering, Dankook University, Yongin 448-701, Korea; (J.J.); (Y.S.S.)
| | - Eunju Lim
- Department of Science Education/Creative Convergent Manufacturing Engineering, Dankook University, Yongin 448-701, Korea
| | - Jun-Ho Jeong
- Nano-Convergence Mechanical Systems Research Division, Korea Institute of Machinery and Materials, Daejeon 34103, Korea; (M.B.); (Z.-J.Z.); (S.H.H.); (H.-J.K.); (S.J.); (J.K.)
- Department of Nano Mechatronics, University of Science and Technology (UST), Daejeon 34113, Korea
| |
Collapse
|
9
|
van der Sman RGM, Houlder S, Cornet S, Janssen A. Physical chemistry of gastric digestion of proteins gels. Curr Res Food Sci 2020; 2:45-60. [PMID: 32914111 PMCID: PMC7473360 DOI: 10.1016/j.crfs.2019.11.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
In this paper, we present the rich physics and chemistry of the gastric digestion of protein gels. Knowledge of this matter is important for the development of sustainable protein foods that are based on novel proteins sources like plant proteins or insects. Their digestibility is an important question in the design of these new protein foods. As polyelectrolyte gels, they can undergo volume changes upon shifts in pH or ionic strengths, as protein gels experience when entering the gastric environment. We show that these volume changes can be modelled using the Flory-Rehner theory, combined with Gibbs-Donnan theory accounting for the distribution of electrolytes over gel and bath. In-vitro experiments of soy protein gels in simulated gastric fluid indeed show intricate swelling behaviour, at first the gels show swelling but at longer times they shrink again. Simulations performed with the Flory-Rehner/Gibbs-Donnan theory reproduce qualitatively similar behaviour. In the final part of the paper, we discuss how the model must be extended to model realistic conditions existing in the in-vivo gastric environment.
Collapse
Affiliation(s)
- R G M van der Sman
- Wageningen Food Biobased Research, Wageningen University & Research, the Netherlands
- Food Process Engineering, Wageningen University & Research, the Netherlands
| | - Sian Houlder
- Food Process Engineering, Wageningen University & Research, the Netherlands
| | - Steven Cornet
- Wageningen Food Biobased Research, Wageningen University & Research, the Netherlands
- Food Process Engineering, Wageningen University & Research, the Netherlands
| | - Anja Janssen
- Food Process Engineering, Wageningen University & Research, the Netherlands
| |
Collapse
|
10
|
Xie Y, Hillmyer MA. Nanostructured Polymer Monoliths for Biomedical Delivery Applications. ACS APPLIED BIO MATERIALS 2020; 3:3236-3247. [PMID: 35025366 DOI: 10.1021/acsabm.0c00228] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Drug delivery systems are designed to control the release rate and location of therapeutic agents in the body to achieve enhanced drug efficacy and to mitigate adverse side effects. In particular, drug-releasing implants provide sustained and localized release. We report nanostructured polymer monoliths synthesized by polymerization-induced microphase separation (PIMS) as potential implantable delivery devices. As a model system, free poly(ethylene oxide) homopolymers were incorporated into the nanoscopic poly(ethylene oxide) domains contained within a cross-linked polystyrene matrix. The in vitro release of these poly(ethylene oxide) molecules from monoliths was investigated as a function of poly(ethylene oxide) loading and molar mass as well as the molar mass and weight fraction of poly(ethylene oxide) macro-chain transfer agent used in the PIMS process for forming the monoliths. We also developed nanostructured microneedles targeting efficient and long-term transdermal drug delivery by combining PIMS and microfabrication techniques. Finally, given the prominence of poly(lactide) in drug delivery devices, the degradation rate of microphase-separated poly(lactide) in PIMS monoliths was evaluated and compared with bulk poly(lactide).
Collapse
Affiliation(s)
- Yihui Xie
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
| | - Marc A Hillmyer
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
| |
Collapse
|
11
|
Sheth S, Barnard E, Hyatt B, Rathinam M, Zustiak SP. Predicting Drug Release From Degradable Hydrogels Using Fluorescence Correlation Spectroscopy and Mathematical Modeling. Front Bioeng Biotechnol 2019; 7:410. [PMID: 31956651 PMCID: PMC6951421 DOI: 10.3389/fbioe.2019.00410] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Accepted: 11/27/2019] [Indexed: 12/27/2022] Open
Abstract
Predicting release from degradable hydrogels is challenging but highly valuable in a multitude of applications such as drug delivery and tissue engineering. In this study, we developed a simple mathematical and computational model that accounts for time-varying diffusivity and geometry to predict solute release profiles from degradable hydrogels. Our approach was to use time snapshots of diffusivity and hydrogel geometry data measured experimentally as inputs to a computational model which predicts release profile. We used two model proteins of varying molecular weights: bovine serum albumin (BSA; 66 kDa) and immunoglobulin G (IgG; 150 kDa). We used fluorescence correlation spectroscopy (FCS) to determine protein diffusivity as a function of hydrogel degradation. We tracked changes in gel geometry over the same time period. Curve fits to the diffusivity and geometry data were used as inputs to the computational model to predict the protein release profiles from the degradable hydrogels. We validated the model using conventional bulk release experiments. Because we approached the hydrogel as a black box, the model is particularly valuable for hydrogel systems whose degradation mechanisms are not known or cannot be accurately modeled.
Collapse
Affiliation(s)
- Saahil Sheth
- Biomedical Engineering, Saint Louis University, St. Louis, MO, United States
| | - Emily Barnard
- Mathematics and Statistics, University of Maryland Baltimore County, Baltimore, MD, United States
| | - Ben Hyatt
- Mathematics and Statistics, University of Maryland Baltimore County, Baltimore, MD, United States
| | - Muruhan Rathinam
- Mathematics and Statistics, University of Maryland Baltimore County, Baltimore, MD, United States
| | | |
Collapse
|
12
|
Fujiyabu T, Li X, Chung UI, Sakai T. Diffusion Behavior of Water Molecules in Hydrogels with Controlled Network Structure. Macromolecules 2019. [DOI: 10.1021/acs.macromol.8b02488] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Takeshi Fujiyabu
- Department of Bioengineering, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo,
Bunkyo-ku, Tokyo 113-8656, Japan
| | - Xiang Li
- Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, 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
| |
Collapse
|
13
|
Senanayake KK, Fakhrabadi EA, Liberatore MW, Mukhopadhyay A. Diffusion of Nanoparticles in Entangled Poly(vinyl alcohol) Solutions and Gels. Macromolecules 2019. [DOI: 10.1021/acs.macromol.8b01917] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
| | | | - Matthew W. Liberatore
- Department of Chemical Engineering, University of Toledo, Toledo, Ohio 43606, United States
| | - Ashis Mukhopadhyay
- Department of Physics, Wayne State University, Detroit, Michigan 48201, United States
| |
Collapse
|
14
|
Nadiv R, Fernandes RM, Ochbaum G, Dai J, Buzaglo M, Varenik M, Biton R, Furó I, Regev O. Polymer nanocomposites: Insights on rheology, percolation and molecular mobility. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.07.079] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
15
|
Inthavong W, Nicolai T, Chassenieux C. Polymer Probe Diffusion in Globular Protein Gels and Aggregate Suspensions. J Phys Chem B 2018; 122:8075-8081. [DOI: 10.1021/acs.jpcb.8b04963] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Walailuk Inthavong
- Le Mans Université, IMMM UMR-CNRS 6283, Polymères, Colloïdes et Interfaces, 72085 Le Mans Cedex 9, France
| | - Taco Nicolai
- Le Mans Université, IMMM UMR-CNRS 6283, Polymères, Colloïdes et Interfaces, 72085 Le Mans Cedex 9, France
| | - Christophe Chassenieux
- Le Mans Université, IMMM UMR-CNRS 6283, Polymères, Colloïdes et Interfaces, 72085 Le Mans Cedex 9, France
| |
Collapse
|
16
|
Kanduč M, Kim WK, Roa R, Dzubiella J. Selective Molecular Transport in Thermoresponsive Polymer Membranes: Role of Nanoscale Hydration and Fluctuations. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b00735] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Matej Kanduč
- Research Group for Simulations of Energy Materials, Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, D-14109 Berlin, Germany
| | - Won Kyu Kim
- Research Group for Simulations of Energy Materials, Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, D-14109 Berlin, Germany
| | - Rafael Roa
- Research Group for Simulations of Energy Materials, Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, D-14109 Berlin, Germany
- Departamento de Física Aplicada I, Facultad de Ciencias, Universidad de Málaga, Campus de Teatinos s/n, E-29071 Málaga, Spain
| | - Joachim Dzubiella
- Research Group for Simulations of Energy Materials, Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, D-14109 Berlin, Germany
- Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, Hermann-Herder Strasse 3, D-79104 Freiburg, Germany
| |
Collapse
|
17
|
Majer G, Southan A. Adenosine triphosphate diffusion through poly(ethylene glycol) diacrylate hydrogels can be tuned by cross-link density as measured by PFG-NMR. J Chem Phys 2018; 146:225101. [PMID: 29166037 DOI: 10.1063/1.4984979] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
The diffusion of small molecules through hydrogels is of great importance for many applications. Especially in biological contexts, the diffusion of nutrients through hydrogel networks defines whether cells can survive inside the hydrogel or not. In this contribution, hydrogels based on poly(ethylene glycol) diacrylate with mesh sizes ranging from ξ = 1.1 to 12.9 nm are prepared using polymers with number-average molecular weights between Mn = 700 and 8000 g/mol. Precise measurements of diffusion coefficients D of adenosine triphosphate (ATP), an important energy carrier in biological systems, in these hydrogels are performed by pulsed field gradient nuclear magnetic resonance. Depending on the mesh size, ξ, and on the polymer volume fraction of the hydrogel after swelling, ϕ, it is possible to tune the relative ATP diffusion coefficient D/D0 in the hydrogels to values between 0.14 and 0.77 compared to the ATP diffusion coefficient D0 in water. The diffusion coefficients of ATP in these hydrogels are compared with predictions of various mathematical expressions developed under different model assumptions. The experimental data are found to be in good agreement with the predictions of a modified obstruction model or the free volume theory in combination with the sieving behavior of the polymer chains. No reasonable agreement was found with the pure hydrodynamic model.
Collapse
Affiliation(s)
- Günter Majer
- Max Planck Institute for Intelligent Systems, Heisenbergstr. 3, 70569 Stuttgart, Germany
| | - Alexander Southan
- Institute of Interfacial Process Engineering and Plasma Technology IGVP, University of Stuttgart, Nobelstr. 12, 70569 Stuttgart, Germany
| |
Collapse
|
18
|
Nath P, Mangal R, Kohle F, Choudhury S, Narayanan S, Wiesner U, Archer LA. Dynamics of Nanoparticles in Entangled Polymer Solutions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:241-249. [PMID: 29192503 DOI: 10.1021/acs.langmuir.7b03418] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The mean square displacement ⟨r2⟩ of nanoparticle probes dispersed in simple isotropic liquids and in polymer solutions is interrogated using fluorescence correlation spectroscopy and single-particle tracking (SPT) experiments. Probe dynamics in different regimes of particle diameter (d), relative to characteristic polymer length scales, including the correlation length (ξ), the entanglement mesh size (a), and the radius of gyration (Rg), are investigated. In simple fluids and for polymer solutions in which d ≫ Rg, long-time particle dynamics obey random-walk statistics ⟨r2⟩:t, with the bulk zero-shear viscosity of the polymer solution determining the frictional resistance to particle motion. In contrast, in polymer solutions with d < Rg, polymer molecules in solution exert noncontinuum resistances to particle motion and nanoparticle probes appear to interact hydrodynamically only with a local fluid medium with effective drag comparable to that of a solution of polymer chain segments with sizes similar to those of the nanoparticle probes. Under these conditions, the nanoparticles exhibit orders of magnitude faster dynamics than those expected from continuum predictions based on the Stokes-Einstein relation. SPT measurements further show that when d > a, nanoparticle dynamics transition from diffusive to subdiffusive on long timescales, reminiscent of particle transport in a field with obstructions. This last finding is in stark contrast to the nanoparticle dynamics observed in entangled polymer melts, where X-ray photon correlation spectroscopy measurements reveal faster but hyperdiffusive dynamics. We analyze these results with the help of the hopping model for particle dynamics in polymers proposed by Cai et al. and, on that basis, discuss the physical origins of the local drag experienced by the nanoparticles in entangled polymer solutions.
Collapse
Affiliation(s)
| | - Rahul Mangal
- Department of Chemical Engineering, Indian Institute of Technology Kanpur , Kanpur, Uttar Pradesh 208016, India
| | | | | | - Suresh Narayanan
- Advanced Photon Source, Argonne National Laboratory , Argonne, Illinois 60349, United States
| | | | | |
Collapse
|
19
|
Enache AA, David L, Puaux JP, Banu I, Bozga G. Kinetics of chitosan coagulation from aqueous solutions. J Appl Polym Sci 2018. [DOI: 10.1002/app.46062] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Alin Alexandru Enache
- Laboratoire Ingénierie des Matériaux Polymères, Université Lyon 1, Centre National de la Recherche Scientifique Unité Mixte de Recherche (France) 5223; 15 Boulevard André Latarjet, Polytech Lyon F-69622 Villeurbanne Cedex France
- Department of Chemical and Biochemical Engineering; Politehnica University of Bucharest; 1 Polizu Street Bucharest 011061 Romania
| | - Laurent David
- Laboratoire Ingénierie des Matériaux Polymères, Université Lyon 1, Centre National de la Recherche Scientifique Unité Mixte de Recherche (France) 5223; 15 Boulevard André Latarjet, Polytech Lyon F-69622 Villeurbanne Cedex France
| | - Jean-Pierre Puaux
- Laboratoire Ingénierie des Matériaux Polymères, Université Lyon 1, Centre National de la Recherche Scientifique Unité Mixte de Recherche (France) 5223; 15 Boulevard André Latarjet, Polytech Lyon F-69622 Villeurbanne Cedex France
| | - Ionut Banu
- Department of Chemical and Biochemical Engineering; Politehnica University of Bucharest; 1 Polizu Street Bucharest 011061 Romania
| | - Grigore Bozga
- Department of Chemical and Biochemical Engineering; Politehnica University of Bucharest; 1 Polizu Street Bucharest 011061 Romania
| |
Collapse
|
20
|
Motion of Molecular Probes and Viscosity Scaling in Polyelectrolyte Solutions at Physiological Ionic Strength. PLoS One 2016; 11:e0161409. [PMID: 27536866 PMCID: PMC4990340 DOI: 10.1371/journal.pone.0161409] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Accepted: 08/04/2016] [Indexed: 11/19/2022] Open
Abstract
We investigate transport properties of model polyelectrolyte systems at physiological ionic strength (0.154 M). Covering a broad range of flow length scales-from diffusion of molecular probes to macroscopic viscous flow-we establish a single, continuous function describing the scale dependent viscosity of high-salt polyelectrolyte solutions. The data are consistent with the model developed previously for electrically neutral polymers in a good solvent. The presented approach merges the power-law scaling concepts of de Gennes with the idea of exponential length scale dependence of effective viscosity in complex liquids. The result is a simple and applicable description of transport properties of high-salt polyelectrolyte solutions at all length scales, valid for motion of single molecules as well as macroscopic flow of the complex liquid.
Collapse
|
21
|
Accessibility of Transglutaminase to Induce Protein Crosslinking in Gelled Food Matrices - Impact of Membrane Structure. FOOD BIOPHYS 2016. [DOI: 10.1007/s11483-016-9428-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
22
|
Donovan P, Chehreghanianzabi Y, Rathinam M, Zustiak SP. Homogenization Theory for the Prediction of Obstructed Solute Diffusivity in Macromolecular Solutions. PLoS One 2016; 11:e0146093. [PMID: 26731550 PMCID: PMC4701423 DOI: 10.1371/journal.pone.0146093] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Accepted: 12/14/2015] [Indexed: 11/23/2022] Open
Abstract
The study of diffusion in macromolecular solutions is important in many biomedical applications such as separations, drug delivery, and cell encapsulation, and key for many biological processes such as protein assembly and interstitial transport. Not surprisingly, multiple models for the a-priori prediction of diffusion in macromolecular environments have been proposed. However, most models include parameters that are not readily measurable, are specific to the polymer-solute-solvent system, or are fitted and do not have a physical meaning. Here, for the first time, we develop a homogenization theory framework for the prediction of effective solute diffusivity in macromolecular environments based on physical parameters that are easily measurable and not specific to the macromolecule-solute-solvent system. Homogenization theory is useful for situations where knowledge of fine-scale parameters is used to predict bulk system behavior. As a first approximation, we focus on a model where the solute is subjected to obstructed diffusion via stationary spherical obstacles. We find that the homogenization theory results agree well with computationally more expensive Monte Carlo simulations. Moreover, the homogenization theory agrees with effective diffusivities of a solute in dilute and semi-dilute polymer solutions measured using fluorescence correlation spectroscopy. Lastly, we provide a mathematical formula for the effective diffusivity in terms of a non-dimensional and easily measurable geometric system parameter.
Collapse
Affiliation(s)
- Preston Donovan
- Department of Mathematics and Statistics, University of Maryland, Baltimore County, Baltimore, Maryland, United States of America
| | - Yasaman Chehreghanianzabi
- Department of Biomedical Engineering, Saint Louis University, St. Louis, Missouri, United States of America
| | - Muruhan Rathinam
- Department of Mathematics and Statistics, University of Maryland, Baltimore County, Baltimore, Maryland, United States of America
| | - Silviya Petrova Zustiak
- Department of Biomedical Engineering, Saint Louis University, St. Louis, Missouri, United States of America
| |
Collapse
|
23
|
Pliskow B, Li JKJ, O'Hara D, Kaya M. A novel approach to modeling acute normovolemic hemodilution. Comput Biol Med 2015; 68:155-64. [PMID: 26654872 DOI: 10.1016/j.compbiomed.2015.11.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2015] [Revised: 10/21/2015] [Accepted: 11/10/2015] [Indexed: 11/28/2022]
Abstract
Acute normovolemic hemodilution (ANH) was introduced as a blood conservation technique to reduce patient exposure to allogenic blood transfusion during surgery. Despite years of research and experience, the best practice procedure, efficacy and safety of ANH remain in question. In this work, a numerical model is developed for the ANH procedure based upon a multi-compartmental, fluid model of the body. The model also analyzes the most commonly used acellular fluids for ANH or for fluid therapy following hemorrhage. The model allows user input of critical ANH parameters, providing the ability to simulate the patient׳s response in real time to many clinical scenarios, using various types of resuscitation fluids. First, the patient׳s response to a representative, clinical ANH protocol and surgery was simulated. Then, the effect of several variables was investigated including: type/amount of resuscitation fluid, number of blood units collected during ANH, and amount of surgical blood loss. Our simulations highlighted the importance of osmotic molecules within the blood in preventing excessive fluid retention and initiating fluid clearance after surgery. The developed model can be utilized as a tool to simulate and optimize a variety of proposed protocol related to the ANH procedure and surgery. It can also be utilized as an educational or training tool to become familiar with the ANH procedure.
Collapse
Affiliation(s)
- Bradley Pliskow
- Department of Biomedical Engineering, Florida Institute of Technology, 150 West University Blvd, Melbourne, FL 32901, United States.
| | - John K-J Li
- Department of Biomedical Engineering, Rutgers University, Piscataway, NJ 08854, United States; College of Biomedical Engineering and Instrument Science, Zhejiang University, Hangzhou, China.
| | - Dorene O'Hara
- Department of Biomedical Engineering, Rutgers University, 1733 Port Place Apt. 401, Reston, VA 20194, United States.
| | - Mehmet Kaya
- Department of Biomedical Engineering, Florida Institute of Technology, 150 West University Blvd, Melbourne, FL 32901, United States.
| |
Collapse
|
24
|
Silva JVC, Pezennec S, Lortal S, Floury J. Flexibility and Charge of Solutes as Factors That Determine Their Diffusion in Casein Suspensions and Gels. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2015; 63:6624-6632. [PMID: 26154894 DOI: 10.1021/acs.jafc.5b02401] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
This work explores the influence of both the physicochemical characteristics of solutes and the solute-matrix interactions on diffusion in casein systems. Diffusion coefficients of three solute groups (dextrans, proteins, and peptides) presenting different physicochemical characteristics, such as molecular flexibility and charge, were measured using the technique of fluorescence recovery after photobleaching (FRAP). The casein systems had the same casein concentration, but different microstructures (suspension or gel), and/or a different pH (5.2 or 6.6). Flexible solutes diffused more rapidly through the casein systems than the rigid ones. Electrostatic interactions between charged solute molecules and the casein matrix were partly screened due to the high ionic strength of the systems. As a consequence, it was the flexibility of the solute molecule (rather than its charge) that most influenced its diffusion through casein systems.
Collapse
Affiliation(s)
- Juliana V C Silva
- †INRA, UMR1253 Science and Technology of Milk and Eggs, F-35042 Rennes, France
- ‡Agrocampus Ouest, UMR1253 Science and Technology of Milk and Eggs, F-35042 Rennes, France
| | - Stéphane Pezennec
- †INRA, UMR1253 Science and Technology of Milk and Eggs, F-35042 Rennes, France
- ‡Agrocampus Ouest, UMR1253 Science and Technology of Milk and Eggs, F-35042 Rennes, France
| | - Sylvie Lortal
- †INRA, UMR1253 Science and Technology of Milk and Eggs, F-35042 Rennes, France
- ‡Agrocampus Ouest, UMR1253 Science and Technology of Milk and Eggs, F-35042 Rennes, France
| | - Juliane Floury
- †INRA, UMR1253 Science and Technology of Milk and Eggs, F-35042 Rennes, France
- ‡Agrocampus Ouest, UMR1253 Science and Technology of Milk and Eggs, F-35042 Rennes, France
| |
Collapse
|
25
|
Limem S, Calvert P. Diffusion properties of inkjet printed ionic self-assembling polyelectrolyte hydrogels. J Mater Chem B 2015; 3:4569-4576. [PMID: 26417449 PMCID: PMC4582597 DOI: 10.1039/c5tb00503e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In the present work, Crank's model was used to characterize solute transport in inkjet printed polyelectrolyte gels. The diffusion of a small charged molecule (fluorescein), various size linear uncharged molecules (dextrans), and a globular protein (albumin) in printed PSS-PDDA with near stoichiometric composition happened respectively at about 10-8, 10-9, and 10-10 cm2/sec. Polyelectrolyte complexes printed with non-stoichiometric ratios were found to be non-equilibrium structures consisting of three populations of polymer chains: fully complexed chains, chains in partial electrostatic interaction with the complex, and chains in excess having minimal interaction with the complex. This structure may be multiple phases. The applicability of hydrodynamic and free volume models to describe transport in printed polyelectrolyte gels was discussed.
Collapse
Affiliation(s)
- Skander Limem
- Department of Bioengineering, University of Massachusetts Dartmouth, North Dartmouth, MA - USA
| | - Paul Calvert
- Department of Chemical Engineering, New Mexico Tech, Socorro, NM - USA. Tel: 575.835.5210;
| |
Collapse
|
26
|
Lee D, Kim M, Kim SY, Shin H, Kim SW, Park I. Investigation of the nanoviscosity effect of a G-quadruplex and single-strand DNA using fluorescence correlation spectroscopy. J Chem Phys 2015; 142:025101. [PMID: 25591385 DOI: 10.1063/1.4905113] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Guanine (G)-quadruplexes are of interest because of their presence in the telomere sequence and the oncogene promoter region. Their diffusion and change of structure, especially in high viscosity solutions, are important for understanding their dynamics. G-quadruplexes may have less effective viscosity (nanoviscosity) when they are smaller than the solvent molecules. In this paper, we report the difference in the diffusion dynamics of the G-rich DNA sequences of single-strand DNA (ssDNA) and the G-quadruplex in aqueous, sucrose, and polyethylene glycol (PEG) solutions. From experiments with aqueous and sucrose solutions, we confirm that a simple diffusion model according to the viscosity is appropriate. In the PEG experiments, the nanoviscosity effect is observed according to PEG's molecular weight. In the PEG 200 solution, both the ssDNA and the G-quadruplex possess macroviscosity. In the PEG 10,000 solution, the G-quadruplex possesses nanoviscosity and the ssDNA possesses macroviscosity, whereas, in the PEG 35,000 solution, both ssDNA and the G-quadruplex possess nanoviscosity. The experimental results are consistent with the theoretical predictions.
Collapse
Affiliation(s)
- Dongkeun Lee
- Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon 305-701, South Korea
| | - Minjung Kim
- Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon 305-701, South Korea
| | - Soo Yong Kim
- Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon 305-701, South Korea
| | - Hyosup Shin
- Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon 305-701, South Korea
| | - Sok Won Kim
- Department of Physics, University of Ulsan, Ulsan 680-749, South Korea
| | - Inho Park
- Department of Physics, University of Incheon, Incheon 406-772, South Korea
| |
Collapse
|
27
|
Wiśniewska A, Sozański K, Kalwarczyk T, Kędra-Królik K, Pieper C, Wieczorek SA, Jakieła S, Enderlein J, Hołyst R. Scaling of activation energy for macroscopic flow in poly(ethylene glycol) solutions: Entangled – Non-entangled crossover. POLYMER 2014. [DOI: 10.1016/j.polymer.2014.07.029] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
28
|
Salami S, Rondeau-Mouro C, Barhoum M, van Duynhoven J, Mariette F. Translational and rotational diffusion of flexible PEG and rigid dendrimer probes in sodium caseinate dispersions and acid gels. Biopolymers 2014; 101:959-65. [DOI: 10.1002/bip.22492] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2014] [Revised: 03/21/2014] [Accepted: 04/01/2014] [Indexed: 11/09/2022]
Affiliation(s)
- Souad Salami
- Irstea, UR TERE; 17 avenue de Cucillé, CS 64427 35044 Rennes France
- Université européenne de Bretagne; France
| | - Corinne Rondeau-Mouro
- Irstea, UR TERE; 17 avenue de Cucillé, CS 64427 35044 Rennes France
- Université européenne de Bretagne; France
| | - Myriam Barhoum
- Irstea, UR TERE; 17 avenue de Cucillé, CS 64427 35044 Rennes France
- Université européenne de Bretagne; France
| | - John van Duynhoven
- Unilever R&D; Olivier van Noortlaan 120 P.O. Box 3130 Vlaardingen The Netherlands
- Laboratory of Biophysics; Wageningen University; Dreijenlaan 3 6703 Wageningen The Netherlands
| | - François Mariette
- Irstea, UR TERE; 17 avenue de Cucillé, CS 64427 35044 Rennes France
- Université européenne de Bretagne; France
| |
Collapse
|
29
|
SRNF membranes for edible oil purification: Introducing free amines in crosslinked PEEK to increase membrane hydrophilicity. POLYMER 2014. [DOI: 10.1016/j.polymer.2013.11.039] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
30
|
Ooi HW, Peng H, Jack KS, Whittaker AK. Understanding the Diffusion of Dextrans in ‘Click' PNIPAAm Hydrogels. Aust J Chem 2014. [DOI: 10.1071/ch13333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Arguably the most important property of a hydrogel is the ability to allow the diffusion of solutes through the crosslinked network. Studies of the diffusion in hydrogels are important for providing information on the rate and extent of the passage of the solute and on the details of the microstructure of the hydrogel. Such knowledge is directly relevant for applications such as controlled drug delivery systems. The structure of novel poly(N-isopropylacrylamide) (PNIPAAm) hydrogels can be revealed by the restricted diffusion of appropriate probe molecules. Dextran molecules, labelled with fluorescent moieties, were incorporated into well-defined PNIPAAm hydrogels to investigate the effects of hydrogel mesh size and dextran molecular size on the diffusivities of solute molecules.
Collapse
|
31
|
Silva J, Peixoto P, Lortal S, Floury J. Transport phenomena in a model cheese: The influence of the charge and shape of solutes on diffusion. J Dairy Sci 2013; 96:6186-98. [DOI: 10.3168/jds.2013-6552] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2013] [Accepted: 07/03/2013] [Indexed: 11/19/2022]
|
32
|
Costa D, Valente AJM, Miguel MG, Queiroz J. Gel network photodisruption: a new strategy for the codelivery of plasmid DNA and drugs. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:13780-13789. [PMID: 21936554 DOI: 10.1021/la2026285] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
In the last 5 years, we have gained further insight on the physical/chemical field of DNA gels. Our expertise on the gel swelling behavior, compaction of DNA by cationic entities, as lipids and surfactants, as well as on the assembly structures of these complexes allow us for the development of novel systems to be used in a variety of biomedical applications. In our previous reports, the physicochemical characterization has been well-established, and now one can evolve to the challenge of using DNA-based carriers in the biological area. Moreover, a new plasmid DNA (pDNA) hydrogel that is porous, is able to swell in the presence of additives, is biocompatible and, thus, is suitable to be used therapeutically was prepared. Here, the dual release of pDNA and solutes with pharmaceutical interest was the main challenge, and thus, we report on the photodisruption of plasmid DNA (pDNA) gels cross-linked with ethylene glycol diglycidyl ether (EGDE) as a strategy for this simultaneous release. The disruption over time, after the irradiation of the gel with ultraviolet light (400 nm), was characterized through the cumulative plasmid DNA release, the evolution in dry weight, the extent of swelling, and also the variations in the gel mesh size. The controlled release of different molecular weight solutes from plasmid DNA gels was investigated, and the influence of both the hydrogel degradation and cross-linker density on the release kinetics were addressed. While the release of lysozyme follows a Fickian process, the release of bovine serum albumin (BSA) and fluoresceinisothiocyanato-dextran (FITC-dextran) is characteristic of a Super Case II release phenomena. In addition, the size of the three solutes partially influences the release behavior; polymer chain mobility and the degree of swelling also play a role. To gain a fundamental understanding of drug release profile from pDNA matrices, in vitro release studies were evaluated using several anti-inflammatory drugs. The quantification of the release mechanism indicates a Super Case II release profile, which can be related with the gel swelling degree. A correlation between the drug release trend and the drug hydrophobicity can be found, with more hydrophobic drugs showing a slower release rate. In brief, this new pDNA gel system is biocompatible, is degradable upon light irradiation, and allows for the controlled and sustained release of plasmid DNA and incorporated solutes. This codelivery of pDNA and drugs would find relevant clinical uses due to the possibility of gene and nongene therapy combination in order to improve the therapeutic efficiency.
Collapse
Affiliation(s)
- Diana Costa
- Centro de Investigação em Ciências da Saúde, Universidade da Beira Interior , 6201-001 Covilhã, Portugal.
| | | | | | | |
Collapse
|
33
|
|
34
|
Kim TW, Slowing II, Chung PW, Lin VSY. Ordered mesoporous polymer-silica hybrid nanoparticles as vehicles for the intracellular controlled release of macromolecules. ACS NANO 2011; 5:360-366. [PMID: 21162552 DOI: 10.1021/nn101740e] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A two-dimensional hexagonal ordered mesoporous polymer-silica hybrid nanoparticle (PSN) material was synthesized by polymerization of acrylate monomers on the surface of SBA-15 mesoporous silica nanoparticles. The structure of the PSN material was analyzed using a series of different techniques, including transmission electron microscopy, powder X-ray diffraction, and N(2) sorption analysis. These structurally ordered mesoporous polymer-silica hybrid nanoparticles were used for the controlled release of membrane-impermeable macromolecules inside eukaryotic cells. The cellular uptake efficiency and biocompatibility of PSN with human cervical cancer cells (HeLa) were investigated. Our results show that the inhibitory concentration (IC(50)) of PSN is very high (>100 μg/mL per million cells), while the median effective concentration for the uptake (EC(50)) of PSN is low (EC(50) = 4.4 μg/mL), indicating that PSNs are fairly biocompatible and easily up-taken in vitro. A membrane-impermeable macromolecule, 40 kDa FITC-Dextran, was loaded into the mesopores of PSNs at low pH. We demonstrated that the PSN material could indeed serve as a transmembrane carrier for the controlled release of FITC-Dextran at the pH level inside live HeLa cells. We believe that further developments of this PSN material will lead to a new generation of nanodevices for intracellular controlled delivery applications.
Collapse
Affiliation(s)
- Tae-Wan Kim
- Green Chemistry Research Division, Korea Research Institute of Chemical Technology, P.O. Box 107, Sinseongro 19, Yuseong-gu, Daejeon 305-600, Korea.
| | | | | | | |
Collapse
|
35
|
Balakrishnan G, Durand D, Nicolai T. Particle Diffusion in Globular Protein Gels in Relation to the Gel Structure. Biomacromolecules 2010; 12:450-6. [DOI: 10.1021/bm101238r] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Dominique Durand
- Polymères, Colloïdes, Interfaces, UMR CNRS Université du Maine, 72085 Le Mans cedex 9, France
| | - Taco Nicolai
- Polymères, Colloïdes, Interfaces, UMR CNRS Université du Maine, 72085 Le Mans cedex 9, France
| |
Collapse
|
36
|
Jiang C, Qian Y, Gao Q, Dong J, Qian W. In Situ controllable preparation of gold nanorods in thermo-responsive hydrogels and their application in surface enhanced Raman scattering. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/c0jm01582b] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
37
|
Waters DJ, Frank CW. Hindered Diffusion of Oligosaccharides in High Strength Poly(ethylene glycol)/Poly(acrylic acid) Interpenetrating Network Hydrogels: Hydrodynamic Versus Obstruction Models. POLYMER 2009; 50:6331-6339. [PMID: 20514136 DOI: 10.1016/j.polymer.2009.05.034] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Diffusion coefficients of small oligosaccharides within high strength poly(ethylene glycol)/poly(acrylic acid) interpenetrating network (PEG/PAA IPN) hydrogels were measured by diffusion through hydrogel slabs. The ability of hindered diffusion models previously presented in the literature to fit the experimental data is examined. A model based solely on effects due to hydrodynamics is compared to a model based solely on solute obstruction. To examine the effect of polymer volume fraction on the observed diffusion coefficients, the equilibrium volume fraction of polymer in PEG/PAA IPNs was systematically varied by changing the initial PEG polymer concentration in hydrogel precursor solutions from 20 to 50 wt./wt.%. To examine the effect of solute radius on the observed diffusion coefficients, solute radii were varied from 3.3 to 5.1 Å by measuring diffusion coefficients of glucose, a monosaccharide; maltose, a disaccharide; and maltotriose, a trisaccharide. Both the hydrodynamic and obstruction models rely on scaling relationships to predict diffusion coefficients. The proper scaling relationship for each of the hindered diffusion models is evaluated based on fits to experimental data. The scaling relationship employed is found to have a greater significance for the hydrodynamic model than the obstruction model. Regardless of the scaling relationship employed, the obstruction model provides a better fit to our experimental data than the hydrodynamic model.
Collapse
Affiliation(s)
- Dale J Waters
- Department of Chemical Engineering, Stanford University, 381 North-South Mall, Stauffer III, Stanford, CA 94305-5025, United States
| | | |
Collapse
|
38
|
Lai BE, Henderson MH, Peters JJ, Walmer DK, Katz DF. Transport theory for HIV diffusion through in vivo distributions of topical microbicide gels. Biophys J 2009; 97:2379-87. [PMID: 19883580 PMCID: PMC2770622 DOI: 10.1016/j.bpj.2009.08.010] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2009] [Revised: 08/01/2009] [Accepted: 08/06/2009] [Indexed: 11/25/2022] Open
Abstract
Topical microbicide products are being developed for the prevention of sexually transmitted infections. These include vaginally-applied gels that deliver anti-HIV molecules. Gels may also provide partial barriers that slow virion diffusion from semen to vulnerable epithelium, increasing the time during which anti-HIV molecules can act. To explore the barrier function of microbicide gels, we developed a deterministic mathematical model for HIV diffusion through realistic gel distributions. We applied the model to experimental data for in vivo coating distributions of two vaginal gels in women. Time required for a threshold number of virions to reach the tissue surface was used as a metric for comparing different scenarios. Results delineated how time to threshold increased with increasing gel layer thickness and with decreasing diffusion coefficient. We note that for gel layers with average thickness > approximately 100 microm, the fractional area coated, rather than the gel layer thickness, was the primary determinant of time to threshold. For gel layers < approximately 100 microm, time to threshold was brief, regardless of fractional area coated. Application of the model to vaginal coating data showed little difference in time to threshold between the two gels tested. However, the protocol after gel application (i.e., with or without simulated coitus) had a much more significant effect. This study suggests that gel distribution in layers of thickness >100 microm and fractional area coated >0.8 is critical in determining the ability of the gel to serve as a barrier to HIV diffusion.
Collapse
Affiliation(s)
- Bonnie E. Lai
- Department of Biomedical Engineering, Duke University, Durham, North Carolina
| | - Marcus H. Henderson
- Department of Biomedical Engineering, Duke University, Durham, North Carolina
| | - Jennifer J. Peters
- Department of Biomedical Engineering, Duke University, Durham, North Carolina
| | - David K. Walmer
- Department of Obstetrics and Gynecology, Duke University, Durham, North Carolina
| | - David F. Katz
- Department of Biomedical Engineering, Duke University, Durham, North Carolina
- Department of Obstetrics and Gynecology, Duke University, Durham, North Carolina
| |
Collapse
|
39
|
Lorén N, Nydén M, Hermansson AM. Determination of local diffusion properties in heterogeneous biomaterials. Adv Colloid Interface Sci 2009; 150:5-15. [PMID: 19481193 DOI: 10.1016/j.cis.2009.05.004] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2009] [Revised: 05/11/2009] [Accepted: 05/12/2009] [Indexed: 11/25/2022]
Abstract
The coupling between structure and diffusion properties is essential for the functionality of heterogeneous biomaterials. Structural heterogeneity is defined and its implications for time-dependent diffusion are discussed in detail. The effect of structural heterogeneity in biomaterials on diffusion and the relevance of length scales are exemplified with regard to different biomaterials such as gels, emulsions, phase separated biopolymer mixtures and chocolate. Different diffusion measurement techniques for determination of diffusion properties at different length and time scales are presented. The interplay between local and global diffusion is discussed. New measurement techniques have emerged that enable simultaneous determination of both structure and local diffusion properties. Special emphasis is given to fluorescence recovery after photobleaching (FRAP). The possibilities of FRAP at a conceptual level is presented. The method of FRAP is briefly reviewed and its use in heterogeneous biomaterials, at barriers and during dynamic changes of the structure is discussed.
Collapse
|
40
|
Klann MT, Lapin A, Reuss M. Stochastic simulation of signal transduction: impact of the cellular architecture on diffusion. Biophys J 2009; 96:5122-9. [PMID: 19527672 DOI: 10.1016/j.bpj.2009.03.049] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2008] [Revised: 03/25/2009] [Accepted: 03/27/2009] [Indexed: 01/10/2023] Open
Abstract
The transduction of signals depends on the translocation of signaling molecules to specific targets. Undirected diffusion processes play a key role in the bridging of spaces between different cellular compartments. The diffusion of the molecules is, in turn, governed by the intracellular architecture. Molecular crowding and the cytoskeleton decrease macroscopic diffusion. This article shows the use of a stochastic simulation method to study the effects of the cytoskeleton structure on the mobility of macromolecules. Brownian dynamics and single particle tracking were used to simulate the diffusion process of individual molecules through a model cytoskeleton. The resulting average effective diffusion is in line with data obtained in the in vitro and in vivo experiments. It shows that the cytoskeleton structure strongly influences the diffusion of macromolecules. The simulation method used also allows the inclusion of reactions in order to model complete signaling pathways in their spatio-temporal dynamics, taking into account the effects of the cellular architecture.
Collapse
Affiliation(s)
- Michael T Klann
- Institute of Biochemical Engineering and Center Systems Biology, Universität Stuttgart, Stuttgart, Germany.
| | | | | |
Collapse
|
41
|
Wu Y, Joseph S, Aluru NR. Effect of Cross-Linking on the Diffusion of Water, Ions, and Small Molecules in Hydrogels. J Phys Chem B 2009; 113:3512-20. [DOI: 10.1021/jp808145x] [Citation(s) in RCA: 141] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Yanbin Wu
- Department of Mechanical Science and Engineering, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana−Champaign, Urbana, IL-61801
| | - Sony Joseph
- Department of Mechanical Science and Engineering, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana−Champaign, Urbana, IL-61801
| | - N. R. Aluru
- Department of Mechanical Science and Engineering, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana−Champaign, Urbana, IL-61801
| |
Collapse
|
42
|
Lorén N, Shtykova L, Kidman S, Jarvoll P, Nydén M, Hermansson AM. Dendrimer Diffusion in κ-Carrageenan Gel Structures. Biomacromolecules 2009; 10:275-84. [DOI: 10.1021/bm801013x] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Niklas Lorén
- SIK, The Swedish Institute for Food and Biotechnology, P.O. Box 5401, SE-402 29 Göteborg, Sweden, and Department of Chemical and Biological Engineering, Chalmers University of Technology, SE-412 96 Göteborg, Sweden
| | - Liubov Shtykova
- SIK, The Swedish Institute for Food and Biotechnology, P.O. Box 5401, SE-402 29 Göteborg, Sweden, and Department of Chemical and Biological Engineering, Chalmers University of Technology, SE-412 96 Göteborg, Sweden
| | - Siw Kidman
- SIK, The Swedish Institute for Food and Biotechnology, P.O. Box 5401, SE-402 29 Göteborg, Sweden, and Department of Chemical and Biological Engineering, Chalmers University of Technology, SE-412 96 Göteborg, Sweden
| | - Patrik Jarvoll
- SIK, The Swedish Institute for Food and Biotechnology, P.O. Box 5401, SE-402 29 Göteborg, Sweden, and Department of Chemical and Biological Engineering, Chalmers University of Technology, SE-412 96 Göteborg, Sweden
| | - Magnus Nydén
- SIK, The Swedish Institute for Food and Biotechnology, P.O. Box 5401, SE-402 29 Göteborg, Sweden, and Department of Chemical and Biological Engineering, Chalmers University of Technology, SE-412 96 Göteborg, Sweden
| | - Anne-Marie Hermansson
- SIK, The Swedish Institute for Food and Biotechnology, P.O. Box 5401, SE-402 29 Göteborg, Sweden, and Department of Chemical and Biological Engineering, Chalmers University of Technology, SE-412 96 Göteborg, Sweden
| |
Collapse
|
43
|
Holyst R, Bielejewska A, Szymański J, Wilk A, Patkowski A, Gapiński J, Żywociński A, Kalwarczyk T, Kalwarczyk E, Tabaka M, Ziębacz N, Wieczorek SA. Scaling form of viscosity at all length-scales in poly(ethylene glycol) solutions studied by fluorescence correlation spectroscopy and capillary electrophoresis. Phys Chem Chem Phys 2009; 11:9025-32. [DOI: 10.1039/b908386c] [Citation(s) in RCA: 152] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
44
|
|
45
|
Payet L, Ponton A, Léger L, Hervet H, Grossiord JL, Agnely F. Self-Diffusion in Chitosan Networks: From a Gel−Gel Method to Fluorescence Recovery after Photobleaching by Fringe Pattern. Macromolecules 2008. [DOI: 10.1021/ma801192q] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Linda Payet
- Matière et Systèmes Complexes UMR 7057 CNRS & Université Denis Diderot-Paris 7, MSC - Case 7056, 75205 Paris Cedex 13, France, Laboratoire de Physique Pharmaceutique UMR CNRS 8612, Faculté de Pharmacie, Université Paris-Sud 11, 5 rue Jean-Baptiste Clément, 92296 Châtenay-Malabry Cedex, France, Laboratoire de Physique des Fluides Organisés, FRE 2844 CNRS-Collège de France, 11 Place Marcelin Berthelot, 75231 Paris Cedex 05, France, and Laboratoire de Physique des solides, UMR 8502 CNRS, Université Paris
| | - Alain Ponton
- Matière et Systèmes Complexes UMR 7057 CNRS & Université Denis Diderot-Paris 7, MSC - Case 7056, 75205 Paris Cedex 13, France, Laboratoire de Physique Pharmaceutique UMR CNRS 8612, Faculté de Pharmacie, Université Paris-Sud 11, 5 rue Jean-Baptiste Clément, 92296 Châtenay-Malabry Cedex, France, Laboratoire de Physique des Fluides Organisés, FRE 2844 CNRS-Collège de France, 11 Place Marcelin Berthelot, 75231 Paris Cedex 05, France, and Laboratoire de Physique des solides, UMR 8502 CNRS, Université Paris
| | - Liliane Léger
- Matière et Systèmes Complexes UMR 7057 CNRS & Université Denis Diderot-Paris 7, MSC - Case 7056, 75205 Paris Cedex 13, France, Laboratoire de Physique Pharmaceutique UMR CNRS 8612, Faculté de Pharmacie, Université Paris-Sud 11, 5 rue Jean-Baptiste Clément, 92296 Châtenay-Malabry Cedex, France, Laboratoire de Physique des Fluides Organisés, FRE 2844 CNRS-Collège de France, 11 Place Marcelin Berthelot, 75231 Paris Cedex 05, France, and Laboratoire de Physique des solides, UMR 8502 CNRS, Université Paris
| | - Hubert Hervet
- Matière et Systèmes Complexes UMR 7057 CNRS & Université Denis Diderot-Paris 7, MSC - Case 7056, 75205 Paris Cedex 13, France, Laboratoire de Physique Pharmaceutique UMR CNRS 8612, Faculté de Pharmacie, Université Paris-Sud 11, 5 rue Jean-Baptiste Clément, 92296 Châtenay-Malabry Cedex, France, Laboratoire de Physique des Fluides Organisés, FRE 2844 CNRS-Collège de France, 11 Place Marcelin Berthelot, 75231 Paris Cedex 05, France, and Laboratoire de Physique des solides, UMR 8502 CNRS, Université Paris
| | - J. Louis Grossiord
- Matière et Systèmes Complexes UMR 7057 CNRS & Université Denis Diderot-Paris 7, MSC - Case 7056, 75205 Paris Cedex 13, France, Laboratoire de Physique Pharmaceutique UMR CNRS 8612, Faculté de Pharmacie, Université Paris-Sud 11, 5 rue Jean-Baptiste Clément, 92296 Châtenay-Malabry Cedex, France, Laboratoire de Physique des Fluides Organisés, FRE 2844 CNRS-Collège de France, 11 Place Marcelin Berthelot, 75231 Paris Cedex 05, France, and Laboratoire de Physique des solides, UMR 8502 CNRS, Université Paris
| | - Florence Agnely
- Matière et Systèmes Complexes UMR 7057 CNRS & Université Denis Diderot-Paris 7, MSC - Case 7056, 75205 Paris Cedex 13, France, Laboratoire de Physique Pharmaceutique UMR CNRS 8612, Faculté de Pharmacie, Université Paris-Sud 11, 5 rue Jean-Baptiste Clément, 92296 Châtenay-Malabry Cedex, France, Laboratoire de Physique des Fluides Organisés, FRE 2844 CNRS-Collège de France, 11 Place Marcelin Berthelot, 75231 Paris Cedex 05, France, and Laboratoire de Physique des solides, UMR 8502 CNRS, Université Paris
| |
Collapse
|
46
|
Thérien-Aubin H, Baille WE, Zhu XX. Diffusion of molecular probes and the effects of their interactions with polymer matrices as studied by pulsed-field gradient NMR spectroscopy. CAN J CHEM 2008. [DOI: 10.1139/v08-036] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Pulsed-field gradient NMR spectroscopy was used to study the interactions between small molecular probes and polymers bearing interacting groups. The self-diffusion coefficients of ethylene glycol and its oligomers and their methyl ester derivatives in poly(vinyl alcohol) gels were measured to study the effect of hydrogen bonding. The self-diffusion coefficients of small molecular probes containing hydroxyl, amine, and carboxylic acid groups were determined in several polymer matrices including poly(vinyl alcohol), poly(allylamine), and poly(acrylic acid) bearing lateral hydroxyl, amine, and carboxylic acid groups, respectively. The ionic interactions between the functional groups of the diffusants and of the polymers exhibited a marked effect on the diffusion of the molecular probes. For example, the reduced self-diffusion coefficients measured for a diffusant with a carboxylic acid group in a poly(allylamine) matrix were shown to be lower even though the molecular masses of the diffusants are similar.Key words: pulsed-field gradient NMR spectroscopy, self-diffusion, intermolecular interactions.
Collapse
|
47
|
|
48
|
Geonnotti AR, Furlow MJ, Wu T, DeSoto MG, Henderson MH, Kiser PF, Katz DF. Measuring macrodiffusion coefficients in microbicide hydrogels via postphotoactivation scanning. Biomacromolecules 2008; 9:748-51. [PMID: 18193840 DOI: 10.1021/bm701018w] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Anthony R Geonnotti
- Department of Biomedical Engineering, Duke University, Box 90281, Durham, North Carolina 27708, USA.
| | | | | | | | | | | | | |
Collapse
|
49
|
Fatin-Rouge N, Wilkinson KJ, Buffle J. Combining small angle neutron scattering (SANS) and fluorescence correlation spectroscopy (FCS) measurements to relate diffusion in agarose gels to structure. J Phys Chem B 2007; 110:20133-42. [PMID: 17034188 DOI: 10.1021/jp060362e] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Small angle neutron scattering (SANS) and fluorescence correlation spectroscopy (FCS) measurements were carried out on agarose hydrogels to link their microscopic structure to the diffusivity of solutes at different scales. SANS allowed for the determination of the distribution of void volumes within the gels. They were shown to be compatible with a random network of cylindrical fibers as described by the Ogston model. FCS measured solute diffusivity in spaces similar in size to the void volumes, and thus, the results reflected the gel heterogeneity. Solute diffusivity was predicted by modeling the gel as microscopic geometrical cells. Variations in the diffusivity of solutes of different sizes could be predicted from the structural parameters of the gel using theory, taking into account obstruction by cylindrical cells and solute hydrodynamics. Prediction of the FCS autocorrelation functions for solutes from a cell model demonstrated a lack of sensitivity of this technique for multicomponent analysis.
Collapse
Affiliation(s)
- Nicolas Fatin-Rouge
- Analytical and Biophysical Environmental Chemistry, Sciences II, University of Geneva, 30 Quai E. Ansermet, CH-1211 Geneva 4, Switzerland.
| | | | | |
Collapse
|
50
|
Kayitmazer AB, Bohidar HB, Mattison KW, Bose A, Sarkar J, Hashidzume A, Russo PS, Jaeger W, Dubin PL. Mesophase separation and probe dynamics in protein-polyelectrolyte coacervates. SOFT MATTER 2007; 3:1064-1076. [PMID: 32900056 DOI: 10.1039/b701334e] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Protein-polyelectrolyte coacervates are self-assembling macroscopically monophasic biomacromolecular fluids whose unique properties arise from transient heterogeneities. The structures of coacervates formed at different conditions of pH and ionic strength from poly(dimethyldiallylammonium chloride) and bovine serum albumin (BSA), were probed using fluorescence recovery after photobleaching. Measurements of self-diffusion in coacervates were carried out using fluorescein-tagged BSA, and similarly tagged Ficoll, a non-interacting branched polysaccharide with the same size as BSA. The results are best explained by temporal and spatial heterogeneities, also inferred from static light scattering and cryo-TEM, which indicate heterogeneous scattering centers of several hundred nm. Taken together with previous dynamic light scattering and rheology studies, the results are consistent with the presence of extensive dilute domains in which are embedded partially interconnected 50-700 nm dense domains. At short length scales, protein mobility is unobstructed by these clusters. At intermediate length scales, proteins are slowed down due to tortuosity effects within the blind alleys of the dense domains, and to adsorption at dense/dilute domain interfaces. Finally, at long length scales, obstructed diffusion is alleviated by the break-up of dense domains. These findings are discussed in terms of previously suggested models for protein-polyelectrolyte coacervates. Possible explanations for the origin of mesophase separation are offered.
Collapse
Affiliation(s)
- A Basak Kayitmazer
- Department of Chemistry, University of Massachusetts Amherst, 710 N. Pleasant St. LGRT 701 Amherst, MA 01003, USA.
| | | | - Kevin W Mattison
- Department of Chemistry, Indiana University-Purdue University, Indianapolis, IN, USA
| | - Arijit Bose
- Department of Chemical Engineering, University of Rhode Island, Kingston, RI, USA
| | - Jayashri Sarkar
- Department of Chemical Engineering, University of Rhode Island, Kingston, RI, USA
| | | | - Paul S Russo
- Department of Chemistry, Louisiana State University, USA
| | - Werner Jaeger
- Fraunhofer Institute of Applied Polymer Research, Germany
| | - Paul L Dubin
- Department of Chemistry, University of Massachusetts Amherst, 710 N. Pleasant St. LGRT 701 Amherst, MA 01003, USA.
| |
Collapse
|