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Zhao W, Lin JS, Nielsen JE, Sørensen K, Wadurkar AS, Ji J, Barron AE, Nangia S, Libera MR. Supramolecular Peptoid Structure Strengthens Complexation with Polyacrylic Acid Microgels. Biomacromolecules 2024; 25:1274-1281. [PMID: 38240722 PMCID: PMC11046531 DOI: 10.1021/acs.biomac.3c01242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/13/2024]
Abstract
We have studied the complexation between cationic antimicrobials and polyanionic microgels to create self-defensive surfaces that responsively resist bacterial colonization. An essential property is the stable sequestration of the loaded (complexed) antimicrobial within the microgel under a physiological ionic strength. Here, we assess the complexation strength between poly(acrylic acid) [PAA] microgels and a series of cationic peptoids that display supramolecular structures ranging from an oligomeric monomer to a tetramer. We follow changes in loaded microgel diameter with increasing [Na+] as a measure of the counterion doping level. Consistent with prior findings on colistin/PAA complexation, we find that a monomeric peptoid is fully released at ionic strengths well below physiological conditions, despite its +5 charge. In contrast, progressively higher degrees of peptoid supramolecular structure display progressively greater resistance to salting out, which we attribute to the greater entropic stability associated with the complexation of multimeric peptoid bundles.
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Affiliation(s)
- Wenhan Zhao
- Department of Chemical Engineering and Materials Science, Stevens Institute of Technology, Hoboken, New Jersey 07030, United States
| | - Jennifer S Lin
- Department of Bioengineering, School of Medicine & School of Engineering, Stanford University, Stanford, California 94305, United States
| | - Josefine Eilsø Nielsen
- Department of Bioengineering, School of Medicine & School of Engineering, Stanford University, Stanford, California 94305, United States
- Department of Science and Environment, Roskilde University, Roskilde DK-4000, Denmark
| | - Kristian Sørensen
- Department of Bioengineering, School of Medicine & School of Engineering, Stanford University, Stanford, California 94305, United States
| | - Anand Sunil Wadurkar
- Department of Biomedical and Chemical Engineering, Syracuse University, Syracuse, New York 13244, United States
| | - Jingjing Ji
- Department of Biomedical and Chemical Engineering, Syracuse University, Syracuse, New York 13244, United States
| | - Annelise E Barron
- Department of Bioengineering, School of Medicine & School of Engineering, Stanford University, Stanford, California 94305, United States
| | - Shikha Nangia
- Department of Biomedical and Chemical Engineering, Syracuse University, Syracuse, New York 13244, United States
| | - Matthew R Libera
- Department of Chemical Engineering and Materials Science, Stevens Institute of Technology, Hoboken, New Jersey 07030, United States
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2
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Morariu S, Avadanei M, Nita LE. Effect of pH on the Poly(acrylic acid)/Poly(vinyl alcohol)/Lysozyme Complexes Formation. Molecules 2023; 29:208. [PMID: 38202791 PMCID: PMC10780248 DOI: 10.3390/molecules29010208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2023] [Revised: 12/20/2023] [Accepted: 12/27/2023] [Indexed: 01/12/2024] Open
Abstract
The interactions between poly(acrylic acid) (PAA), poly(vinyl alcohol) (PVA), and lysozyme (Lys) in an aqueous environment at pHs of 2, 4, and 7.4 were discussed considering the experimental data obtained by turbidimetry, electrokinetic and rheological measurements, and FTIR analysis. It was found that the increase in PAA amount reduces the coacervation zone by shifting the critical pHcr1to higher values while the critical pHcr2 remains unchanged. The coacervation zone extended from 3.1-4.2 to 2.9-4.7 increasing the Lys concentration from 0.2% to 0.5%. The zeta potential measurements showed that the PAA-PVA-Lys mixture in water is the most stable in the pH range of 4.5-8. Zero shear viscosity exhibited deviations from additivity at both investigated pHs, and a maximum value corresponding to a maximum hydrodynamic volume was revealed at PAA weight fractions of 0.4 and 0.5 for pHs of 4 and 7.4, respectively. The binding affinity to Lys of PAA, established by molecular dynamics simulation, was slightly higher than that of PVA. The more stable complex was PAA-Lys formed in a very acidic environment; for that, a binding affinity of -7.1 kcal/mol was determined.
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Affiliation(s)
- Simona Morariu
- “Petru Poni” Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, 700487 Iasi, Romania; (M.A.); (L.E.N.)
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3
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Xiao X, Ji J, Zhao W, Nangia S, Libera M. Salt Destabilization of Cationic Colistin Complexation within Polyanionic Microgels. Macromolecules 2022. [DOI: 10.1021/acs.macromol.1c02157] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xixi Xiao
- Department of Chemical Engineering and Materials Science, Stevens Institute of Technology, Hoboken, New Jersey 07030, United States
| | - Jingjing Ji
- Department of Biomedical and Chemical Engineering, Syracuse University, Syracuse, New York 13244, United States
| | - Wenhan Zhao
- Department of Chemical Engineering and Materials Science, Stevens Institute of Technology, Hoboken, New Jersey 07030, United States
| | - Shikha Nangia
- Department of Biomedical and Chemical Engineering, Syracuse University, Syracuse, New York 13244, United States
| | - Matthew Libera
- Department of Chemical Engineering and Materials Science, Stevens Institute of Technology, Hoboken, New Jersey 07030, United States
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4
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Al-Tikriti Y, Hansson P. Drug-Induced Phase Separation in Polyelectrolyte Microgels. Gels 2021; 8:gels8010004. [PMID: 35049539 PMCID: PMC8774790 DOI: 10.3390/gels8010004] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 12/08/2021] [Accepted: 12/18/2021] [Indexed: 01/28/2023] Open
Abstract
Polyelectrolyte microgels may undergo volume phase transition upon loading and the release of amphiphilic molecules, a process important in drug delivery. The new phase is “born” in the outermost gel layers, whereby it grows inward as a shell with a sharp boundary to the “mother” phase (core). The swelling and collapse transitions have previously been studied with microgels in large solution volumes, where they go to completion. Our hypothesis is that the boundary between core and shell is stabilized by thermodynamic factors, and thus that collapsed and swollen phases should be able to also coexist at equilibrium. We investigated the interaction between sodium polyacrylate (PA) microgel networks (diameter: 400–850 µm) and the amphiphilic drug amitriptyline hydrochloride (AMT) in the presence of NaCl/phosphate buffer of ionic strength (I) 10 and 155 mM. We used a specially constructed microscopy cell and micromanipulators to study the size and internal morphology of single microgels equilibrated in small liquid volumes of AMT solution. To probe the distribution of AMT micelles we used the fluorescent probe rhodamine B. The amount of AMT in the microgel was determined by a spectrophotometric technique. In separate experiments we studied the binding of AMT and the distribution between different microgels in a suspension. We found that collapsed, AMT-rich, and swollen AMT-lean phases coexisted in equilibrium or as long-lived metastable states at intermediate drug loading levels. In single microgels at I = 10 mM, the collapsed phase formed after loading deviated from the core-shell configuration by forming either discrete domains near the gel boundary or a calotte shaped domain. At I = 155 mM, single microgels, initially fully collapsed, displayed a swollen shell and a collapsed core after partial release of the AMT load. Suspensions displayed a bimodal distribution of swollen and collapsed microgels. The results support the hypothesis that the boundary between collapsed and swollen phases in the same microgel is stabilized by thermodynamic factors.
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Affiliation(s)
- Yassir Al-Tikriti
- Department of Pharmacy, Uppsala University, P.O. Box 580, 75123 Uppsala, Sweden;
- Department of Medicinal Chemistry, Uppsala University, P.O. Box 574, 75123 Uppsala, Sweden
| | - Per Hansson
- Department of Pharmacy, Uppsala University, P.O. Box 580, 75123 Uppsala, Sweden;
- Department of Medicinal Chemistry, Uppsala University, P.O. Box 574, 75123 Uppsala, Sweden
- Correspondence: ; Tel.: +46-18-4714027
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5
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Oliveira IS, Machado RL, Araújo MJ, Gomes AC, Marques EF. Stimuli-Sensitive Self-Assembled Tubules Based on Lysine-Derived Surfactants for Delivery of Antimicrobial Proteins. Chemistry 2021; 27:692-704. [PMID: 32830362 DOI: 10.1002/chem.202003320] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Indexed: 11/06/2022]
Abstract
Drug delivery vectors based on amphiphiles have important features such as versatile physicochemical properties and stimuli-responsiveness. Amino acid-based surfactants are especially promising amphiphiles due to their enhanced biocompatibility compared to conventional surfactants. They can self-organize into micelles, vesicles and complex hierarchical structures, such as fibers, twisted and coiled ribbons, and tubules. In this work, we investigated the self-assembly and drug loading properties of a family of novel anionic double-tailed lysine-derived surfactants, with variable degree of tail length mismatch, designated as mLys10 and 10Lysn, where m and n are the number of carbon atoms in the tails. These surfactants form tubular aggregates with assorted morphologies in water that undergo gelation due to dense entanglement, as evidenced by light and electron microscopy. Lysozyme (LZM), an enzyme with antimicrobial properties, was selected as model protein for loading. After the characterization of the interfacial properties and phase behavior of the amphiphiles, the LZM-loading ability of the tubules was investigated, under varying experimental conditions, to assess the efficiency of the aggregates as pH- and temperature-sensitive nanocarriers. Further, the toxicological profile of the surfactants per se and surfactant/LZM hydrogels was obtained, using human skin fibroblasts (BJ-5ta cell line). Overall, the results show that the tubule-based hydrogels exhibit very interesting properties for the transport and controlled release of molecules of therapeutic interest.
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Affiliation(s)
- Isabel S Oliveira
- CIQUP, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre s/n, 4169-007, Porto, Portugal
| | - Rui L Machado
- CIQUP, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre s/n, 4169-007, Porto, Portugal
| | - Maria J Araújo
- LAQV-REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre s/n, 4169-007, Porto, Portugal
| | - Andreia C Gomes
- CBMA-Centro de Biologia Molecular e Ambiental, Departamento de Biologia, Universidade do Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - Eduardo F Marques
- CIQUP, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre s/n, 4169-007, Porto, Portugal
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6
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Protein adsorption to poly(tetrafluoroethylene) membranes modified with grafted poly(acrylic acid) chains. Biointerphases 2020; 15:031011. [PMID: 32527100 DOI: 10.1116/6.0000137] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Protein adsorption to biomaterial surfaces is important for the function of such materials with anchorage-dependent cell adhesion requiring the presence of adsorbed proteins. The current study evaluated five solid surfaces with poly(acrylic acid) (PAA) grafted from the surface of a poly(tetrafluoroethylene) membrane with respect to the adsorption of serum albumin (SA), lactoferrin (Lf), and lysozyme (Lys) from a phosphate buffer and NaCl solution or water for specific combinations. With the use of x-ray photoelectron spectroscopy, the relative amounts and protein layer thickness were evaluated. SA adsorption was governed by ionic repulsive forces and hydrophobic interactions as evidenced from an increase in the protein adsorption at lower pH (6.5 compared to 7.4) and a correlation with surface coverage when water (pH 6.5) was used as the medium. The adsorption of Lf and Lys followed similar trends for all samples. In general, ionic attractive forces dominated and a strong correlation of increasing protein adsorption with the PAA chain length was evident. This study concluded that all surfaces appear suitable for use in biomaterial applications where tissue ingrowth is desired and that the enhanced protein adsorption in a medium with high ionic strength (e.g., biological fluid) correlates with the PAA chain length rather than the surface coverage.
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7
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Impact of polyelectrolytes on lysozyme properties in colloidal dispersions. Colloids Surf B Biointerfaces 2019; 183:110419. [DOI: 10.1016/j.colsurfb.2019.110419] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Revised: 07/31/2019] [Accepted: 08/01/2019] [Indexed: 11/20/2022]
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8
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Lu D, Zhu M, Wang W, Wu S, Saunders BR, Adlam DJ, Hoyland JA, Hofzumahaus C, Schneider S, Landfester K. Do the properties of gels constructed by interlinking triply-responsive microgels follow from those of the building blocks? SOFT MATTER 2019; 15:527-536. [PMID: 30444236 DOI: 10.1039/c8sm01510d] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Microgels (MGs) are swellable crosslinked polymer colloids. They can also be used as the only building block to construct nanostructured hydrogels which are denoted as doubly crosslinked microgels (DX MGs). Here, new triply responsive DX MGs comprised of interlinked MGs of oligo(ethylene glycol)methacrylate (OEGMA), 2-(2-methoxyethoxy)ethyl methacrylate (MEO2MA), methacrylic acid (MAA) and a o-nitrobenzyl-based UV photocleavable crosslinker are investigated. The MGs swelled or collapsed in response to temperature and pH changes. These behaviours were rationalised with a generic model using Monte Carlo simulations. The MGs also degraded when UV irradiated due to photocleavage of nPh. DX MGs were assembled from the MGs to give injectable gels that were not cytotoxic to nucleus pulposus cells. Comparison of the responsive properties of the DX MGs and MGs showed that the temperature and pH responses of the former were mostly governed by the latter. However, two key differences were found. Firstly, whilst increasing the crosslinker mol% in the MG building blocks (x) did not change MG particle swelling, the compression modulus (E) and swelling of the DX MG gels were strongly affected by x. The E value for the gels was tuneable using x which is a potentially useful new observation for DX MGs. Secondly, UV irradiation of the DX MGs enhanced gel mechanical photostability in contrast to the behaviour of the MGs. We find that the properties of the DX MGs do not simply follow those of the parent MGs and propose mechanisms to account for the differences. The new family of multi-responsive DX MGs presented in this study have potential application for soft tissue repair as injectable gels or as gel implants which report sterilisation.
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Affiliation(s)
- Dongdong Lu
- School of Materials, University of Manchester, MSS Tower, Manchester, M13 9PL, UK.
| | - Mingning Zhu
- School of Materials, University of Manchester, MSS Tower, Manchester, M13 9PL, UK.
| | - Wenkai Wang
- School of Materials, University of Manchester, MSS Tower, Manchester, M13 9PL, UK.
| | - Shanglin Wu
- School of Materials, University of Manchester, MSS Tower, Manchester, M13 9PL, UK.
| | - Brian R Saunders
- School of Materials, University of Manchester, MSS Tower, Manchester, M13 9PL, UK.
| | - Daman J Adlam
- Division of Cell Matrix Biology and Regenerative Medicine, Faculty of Biology, Medicine and Health, University of Manchester, Oxford Road, Manchester, M13 9PT, UK
| | - Judith A Hoyland
- Division of Cell Matrix Biology and Regenerative Medicine, Faculty of Biology, Medicine and Health, University of Manchester, Oxford Road, Manchester, M13 9PT, UK and NIHR Manchester Musculoskeletal Biomedical Research Centre, Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK
| | - Cornelius Hofzumahaus
- Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, D-52056, Aachen, Germany
| | - Stefanie Schneider
- Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, D-52056, Aachen, Germany
| | - Katharina Landfester
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
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9
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Hagemann A, Giussi JM, Longo GS. Use of pH Gradients in Responsive Polymer Hydrogels for the Separation and Localization of Proteins from Binary Mixtures. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b01876] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Annika Hagemann
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), UNLP-CONICET, La Plata, Argentina
| | - Juan M. Giussi
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), UNLP-CONICET, La Plata, Argentina
| | - Gabriel S. Longo
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), UNLP-CONICET, La Plata, Argentina
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10
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Schuurmans CCL, Abbadessa A, Bengtson MA, Pletikapic G, Eral HB, Koenderink G, Masereeuw R, Hennink WE, Vermonden T. Complex coacervation-based loading and tunable release of a cationic protein from monodisperse glycosaminoglycan microgels. SOFT MATTER 2018; 14:6327-6341. [PMID: 30024582 DOI: 10.1039/c8sm00686e] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Glycosaminoglycans (GAGs) are of interest for biomedical applications because of their ability to retain proteins (e.g. growth factors) involved in cell-to-cell signaling processes. In this study, the potential of GAG-based microgels for protein delivery and their protein release kinetics upon encapsulation in hydrogel scaffolds were investigated. Monodisperse hyaluronic acid methacrylate (HAMA) and chondroitin sulfate methacrylate (CSMA) micro-hydrogel spheres (diameters 500-700 μm), were used to study the absorption of a cationic model protein (lysozyme), microgel (de)swelling, intra-gel lysozyme distribution and its diffusion coefficient in the microgels dispersed in buffers (pH 7.4) of varying ionic strengths. Upon incubation in 20 mM buffer, lysozyme was absorbed up to 3 and 4 mg mg-1 dry microspheres for HAMA and CSMA microgels respectively, with loading efficiencies up to 100%. Binding stoichiometries of disaccharide : lysozyme (10.2 : 1 and 7.5 : 1 for HAMA and CSMA, respectively) were similar to those for GAG-lysozyme complex coacervates based on soluble GAGs found in literature. Complex coacervates inside GAG microgels were also formed in buffers of higher ionic strengths as opposed to GAG-lysozyme systems based on soluble GAGs, likely due to increased local anionic charge density in the GAG networks. Binding of cationic lysozyme to the negatively charged microgel networks resulted in deswelling up to a factor 2 in diameter. Lysozyme release from the microgels was dependent on the ionic strength of the buffer and on the number of anionic groups per disaccharide, (1 for HAMA versus 2 for CSMA). Lysozyme diffusion coefficients of 0.027 in HAMA and <0.006 μm2 s-1 in CSMA microgels were found in 170 mM buffer (duration of release 14 and 28 days respectively). Fluorescence Recovery After Photobleaching (FRAP) measurements yielded similar trends, although lysozyme diffusion was likely altered due to the negative charges introduced to the protein through the FITC-labeling resulting in weaker protein-matrix interactions. Finally, lysozyme-loaded CSMA microgels were embedded into a thermosensitive hydrogel scaffold. These composite systems showed complete lysozyme release in ∼58 days as opposed to only 3 days for GAG-free scaffolds. In conclusion, covalently crosslinked methacrylated GAG hydrogels have potential as controlled release depots for cationic proteins in tissue engineering applications.
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Affiliation(s)
- Carl C L Schuurmans
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences (UIPS), Science for Life, Utrecht University, P.O. Box 80082, 3508 TB Utrecht, The Netherlands.
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11
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Ortega A, Meléndez-Ortiz HI, García-Uriostegui L, Ávila-Soria G. Drug delivery system based on poly(ether-block-amide) and acrylic acid for controlled release of vancomycin. J Appl Polym Sci 2018. [DOI: 10.1002/app.45745] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Alejandra Ortega
- Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Circuito Exterior s/n, Ciudad Universitaria; Ciudad de México 04510 México
| | - H. Iván Meléndez-Ortiz
- CONACyT-Centro de Investigaciones en Química Aplicada, Blvd. Enrique Reyna Hermosillo #140; Saltillo Coahuila 25294 México
| | | | - Griselda Ávila-Soria
- Laboratory of Ecological Evolutionary Developmental Biology, Reef System Unit, Institute of Marine Sciences and Limnology (ICML) of the National Autonomous University of Mexico (UNAM); Puerto Morelos, Quintana Roo, C.P 77580 México
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12
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Andersson M, Hansson P. Binding of Lysozyme to Spherical Poly(styrenesulfonate) Gels. Gels 2018; 4:E9. [PMID: 30674786 PMCID: PMC6318605 DOI: 10.3390/gels4010009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Revised: 12/30/2017] [Accepted: 01/10/2018] [Indexed: 11/16/2022] Open
Abstract
Polyelectrolyte gels are useful as carriers of proteins and other biomacromolecules in, e.g., drug delivery. The rational design of such systems requires knowledge about how the binding and release are affected by electrostatic and hydrophobic interactions between the components. To this end we have investigated the uptake of lysozyme by weakly crosslinked spherical poly(styrenesulfonate) (PSS) microgels and macrogels by means of micromanipulator assisted light microscopy and small angle X-ray scattering (SAXS) in an aqueous environment. The results show that the binding process is an order of magnitude slower than for cytochrome c and for lysozyme binding to sodium polyacrylate gels under the same conditions. This is attributed to the formation of very dense protein-rich shells in the outer layers of the microgels with low permeability to the protein. The shells in macrogels contain 60 wt % water and nearly charge stoichiometric amounts of lysozyme and PSS in the form of dense complexes of radius 8 nm comprising 30⁻60 lysozyme molecules. With support from kinetic modelling results we propose that the rate of protein binding and the relaxation rate of the microgel are controlled by the protein mass transport through the shell, which is strongly affected by hydrophobic and electrostatic interactions. The mechanism explains, in turn, an observed dependence of the diffusion rate on the apparent degree of crosslinking of the networks.
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Affiliation(s)
- Martin Andersson
- Department of Pharmacy, Uppsala University, Box 580, SE-75123 Uppsala, Sweden.
| | - Per Hansson
- Department of Pharmacy, Uppsala University, Box 580, SE-75123 Uppsala, Sweden.
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13
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Gernandt J, Hansson P. Surfactant-induced core/shell phase equilibrium in hydrogels. J Chem Phys 2016; 144:064902. [DOI: 10.1063/1.4941326] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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14
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Li ZB, Xiang YH, Zhou XJ, Nie JJ, Peng M, Du BY. Thermo-sensitive poly(DEGMMA-co-MEA) microgels: Synthesis, characterization and interfacial interaction with adsorbed protein layer. CHINESE JOURNAL OF POLYMER SCIENCE 2015. [DOI: 10.1007/s10118-015-1694-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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15
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Yigit C, Heyda J, Dzubiella J. Charged patchy particle models in explicit salt: Ion distributions, electrostatic potentials, and effective interactions. J Chem Phys 2015; 143:064904. [DOI: 10.1063/1.4928077] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Affiliation(s)
- Cemil Yigit
- Soft Matter and Functional Materials, Helmholtz-Zentrum Berlin, 14109 Berlin, Germany
- Helmholtz Virtual Institute “Multifunctional Biomaterials for Medicine,” 14513 Teltow, Germany
- Institut für Physik, Humboldt-Universität zu Berlin, 12489 Berlin, Germany
| | - Jan Heyda
- Department of Physical Chemistry, University of Chemistry and Technology, Prague, 166 28 Praha 6, Czech Republic
| | - Joachim Dzubiella
- Soft Matter and Functional Materials, Helmholtz-Zentrum Berlin, 14109 Berlin, Germany
- Helmholtz Virtual Institute “Multifunctional Biomaterials for Medicine,” 14513 Teltow, Germany
- Institut für Physik, Humboldt-Universität zu Berlin, 12489 Berlin, Germany
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16
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Gernandt J, Hansson P. Hysteresis in the Surfactant-Induced Volume Transition of Hydrogels. J Phys Chem B 2015; 119:1717-25. [DOI: 10.1021/jp5087416] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jonas Gernandt
- Department
of Pharmacy, Uppsala University, Box
580, SE-75123 Uppsala, Sweden
| | - Per Hansson
- Department
of Pharmacy, Uppsala University, Box
580, SE-75123 Uppsala, Sweden
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17
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Martínez LJ, Sánchez ML, Kikot P, Candal R, Grasselli M. Preparation of functional currant-bun-like fumed silica/polymethacrylate nanoparticles by radiation-induced polymerization. Colloids Surf A Physicochem Eng Asp 2014. [DOI: 10.1016/j.colsurfa.2014.09.015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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18
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Chen LY, Wu WC, Chang HT. Functional microgels assisted tryptic digestion and quantification of cytochrome c through internal standard mass spectrometry. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2014; 25:1944-1952. [PMID: 25257189 DOI: 10.1007/s13361-014-0983-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2014] [Revised: 08/05/2014] [Accepted: 08/07/2014] [Indexed: 06/03/2023]
Abstract
Quantitation of cytochrome c (Cyt c) in cell lysates through surface-assisted laser desorption/ionization mass spectrometry (SALDI-MS) using gold nanoparticles (Au NPs) as the matrix and GR-10 peptide as an internal standard has been demonstrated. To shorten digestion time, temperature sensitive microgels containing trypsin (TR) and Au NPs have been employed. As-prepared functional microgels (TR/Au NPs/MGs) allow digestion of Cyt c within 15 s under microwave irradiation. The internal standard SALDI-MS approach provides linearity (R(2) = 0.98) of MS signal ratio (I 1168.6/I 1067.6) of the tryptic digested peptide (m/z 1168.6) to GR-10 peptide (m/z 1067.6) against the concentration of Cyt c ranging from 25 to 200 nM, with a limit of detection (at a signal-to-noise ratio of 3) of 10 nM. This approach has been validated by the analysis of the lysates of HeLa cells, with an average concentration of 13.7 ± 3.5 μM for cytoplasmic Cyt c. Increased concentrations of Cyt c in the HeLa cells treated with etoposide (a commercial drug) or carbon dots (potential drug) have been revealed through this simple, sensitive, and rapid SALDI-MS approach, supporting the drugs induced Cyt c-mediated apoptosis of the cells. This study has shown that this internal standard SALDI-MS approach holds great potential for cell study.
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Affiliation(s)
- Li-Yi Chen
- Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan
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Yigit C, Welsch N, Ballauff M, Dzubiella J. Protein sorption to charged microgels: characterizing binding isotherms and driving forces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:14373-14385. [PMID: 22989142 DOI: 10.1021/la303292z] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We present a set of Langmuir binding models in which electrostatic cooperativity effects to protein sorption is incorporated in the spirit of Guoy-Chapman-Stern models, where the global substrate (microgel) charge state is modified by bound reactants (charged proteins). Application of this approach to lysozyme sorption to oppositely charged core-shell microgels allows us to extract the intrinsic, binding affinity of the protein to the gel, which is salt concentration independent and mostly hydrophobic in nature. The total binding affinity is found to be mainly electrostatic in nature, changes many orders of magnitude during the sorption process, and is significantly influenced by osmotic deswelling effects. The intrinsic binding affinity is determined to be about 7 k(B)T for our system. We additionally show that Langmuir binding models and those based on excluded-volume interactions are formally equivalent for low to moderate protein packing, if the nature of the bound state is consistently defined. Having appreciated this, a more quantitative interpretation of binding isotherms in terms of separate physical interactions is possible in the future for a wide variety of experimental approaches.
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Affiliation(s)
- Cemil Yigit
- Soft Matter and Functional Materials, Helmholtz-Zentrum Berlin, Hahn-Meitner Platz 1, 14109 Berlin, Germany
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20
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Gilmore L, Rimmer S, McArthur SL, Mittar S, Sun D, MacNeil S. Arginine functionalization of hydrogels for heparin binding--a supramolecular approach to developing a pro-angiogenic biomaterial. Biotechnol Bioeng 2012; 110:296-317. [PMID: 22753043 DOI: 10.1002/bit.24598] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2012] [Revised: 06/18/2012] [Accepted: 06/22/2012] [Indexed: 11/05/2022]
Abstract
Our aim was to synthesize a biomaterial that stimulates angiogenesis for tissue engineering applications by exploiting the ability of heparin to bind and release vascular endothelial growth factor (VEGF). The approach adopted involved modification of a hydrogel with positively charged peptides (oligolysine or oligoarginine) to achieve heparin binding. Precursor hydrogels were produced from copolymerization of N-vinyl pyrolidone, diethylene glycol bis allyl carbonate and acrylic acid (PNDA) and functionalized after activation of the carboxylic acid groups with trilysine or triarginine peptides (PNDKKK and PNDRRR). Both hydrogels were shown to bind and release bioactive VEGF165 with arginine-modified hydrogel outperforming the lysine-modified hydrogel. Cytocompatibility of the hydrogels was confirmed in vitro with primary human dermal fibroblasts and human dermal microvascular endothelial cells (HUDMECs). Proliferation of HUDMECs was stimulated by triarginine-functionalized hydrogels, and to a lesser extent by lysine functionalized hydrogels once loaded with heparin and VEGF. The data suggests that heparin-binding hydrogels provide a promising approach to a pro-angiogenic biomaterial.
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Affiliation(s)
- Louisa Gilmore
- Department of Chemistry, University of Sheffield, Sheffield S3 7HF, UK
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Microgels and microcapsules in peptide and protein drug delivery. Adv Drug Deliv Rev 2011; 63:1172-85. [PMID: 21914455 DOI: 10.1016/j.addr.2011.08.005] [Citation(s) in RCA: 159] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2011] [Revised: 08/16/2011] [Accepted: 08/30/2011] [Indexed: 11/20/2022]
Abstract
The present review focuses on the interaction of microgels and microcapsules with biological macromolecules, particularly peptides and proteins, as well as drug delivery applications of such systems. Results from recent studies on factors affecting peptide/protein binding to, and release from, microgels and related systems are discussed, including effects of network properties, as well as protein aggregation, peptide length, hydrophobicity and charge (distributions), secondary structure, and cyclization. Effects of ambient conditions (pH, ionic strength, temperature, etc.) are also discussed, all with focus on factors of importance for the performance of microgel and microcapsule delivery systems for biomacromolecular drugs.
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Lapitsky Y. Stimulus-Responsive Polyelectrolyte Particles: From Nanospheres to Macroscopic Beads. J DISPER SCI TECHNOL 2011. [DOI: 10.1080/01932691.2010.497704] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Månsson R, Bysell H, Hansson P, Schmidtchen A, Malmsten M. Effects of Peptide Secondary Structure on the Interaction with Oppositely Charged Microgels. Biomacromolecules 2010; 12:419-24. [DOI: 10.1021/bm101165e] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ronja Månsson
- Department of Pharmacy, Uppsala University, P.O. Box 580, SE-751 23 Uppsala, Sweden, and Section of Dermatology and Venerology, Department of Clinical Sciences, Lund University, SE-221 84 Lund, Sweden
| | - Helena Bysell
- Department of Pharmacy, Uppsala University, P.O. Box 580, SE-751 23 Uppsala, Sweden, and Section of Dermatology and Venerology, Department of Clinical Sciences, Lund University, SE-221 84 Lund, Sweden
| | - Per Hansson
- Department of Pharmacy, Uppsala University, P.O. Box 580, SE-751 23 Uppsala, Sweden, and Section of Dermatology and Venerology, Department of Clinical Sciences, Lund University, SE-221 84 Lund, Sweden
| | - Artur Schmidtchen
- Department of Pharmacy, Uppsala University, P.O. Box 580, SE-751 23 Uppsala, Sweden, and Section of Dermatology and Venerology, Department of Clinical Sciences, Lund University, SE-221 84 Lund, Sweden
| | - Martin Malmsten
- Department of Pharmacy, Uppsala University, P.O. Box 580, SE-751 23 Uppsala, Sweden, and Section of Dermatology and Venerology, Department of Clinical Sciences, Lund University, SE-221 84 Lund, Sweden
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24
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Malmsten M, Bysell H, Hansson P. Biomacromolecules in microgels — Opportunities and challenges for drug delivery. Curr Opin Colloid Interface Sci 2010. [DOI: 10.1016/j.cocis.2010.05.016] [Citation(s) in RCA: 118] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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25
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Silva RA, Urzúa MD, Petri DFS, Dubin PL. Protein adsorption onto polyelectrolyte layers: effects of protein hydrophobicity and charge anisotropy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:14032-14038. [PMID: 20672852 DOI: 10.1021/la102254g] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Ellipsometry was used to investigate the influence of ionic strength (I) and pH on the adsorption of bovine serum albumin (BSA) or beta-lactoglobulin (BLG) onto preabsorbed layers of two polycations: poly(diallyldimethylammonium chloride) (PDADMAC) or poly(4-vinylpyridine bromide) quaternized with linear aliphatic chains of two (QPVP-C2) or five (QPVP-C5) carbons. Comparisons among results for the three polycations reveal hydrophobic interactions, while comparisons between BSA and BLG-proteins of very similar isoelectric points (pI)-indicate the importance of protein charge anisotropy. At pH close to pI, the ionic strength dependence of the adsorbed amount of protein (Gamma) displayed maxima in the range 10 < I < 25 mM corresponding to Debye lengths close to the protein radii. Visualization of protein charge by Delphi suggested that these ionic strength conditions corresponded to suppression of long-range repulsion between polycations and protein positive domains, without diminution of short-range attraction between polycation segments and locally negative protein domains, in a manner similar to the behavior of PE-protein complexes in solution. (1-4) This description was consistent with the disappearance of the maxima at pH either above or below pI. In the former case, Gamma values decrease exponentially with I(1/2), due to screening of attractions, while in the latter case adsorption of both proteins decreased at low I due to strong repulsion. Close to or below pI both proteins adsorbed more strongly onto QPVP-C5 than onto QPVP-C2 or PDADMAC due to hydrophobic interactions with the longer alkyl group. Above pI, the adsorption was more pronounced with PDADMAC because these chains may assume more loosely bound layers due to lower linear charge density.
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Affiliation(s)
- Rubens A Silva
- Instituto de Química, Universidade de São Paulo, São Paulo, Brazil
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26
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Johansson C, Gernandt J, Bradley M, Vincent B, Hansson P. Interaction between lysozyme and colloidal poly(NIPAM-co-acrylic acid) microgels. J Colloid Interface Sci 2010; 347:241-51. [DOI: 10.1016/j.jcis.2010.03.072] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2010] [Revised: 03/29/2010] [Accepted: 03/31/2010] [Indexed: 10/19/2022]
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Li Y, Vries RD, Kleijn M, Slaghek T, Timmermans J, Stuart MC, Norde W. Lysozyme Uptake by Oxidized Starch Polymer Microgels. Biomacromolecules 2010; 11:1754-62. [DOI: 10.1021/bm100206k] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Yuan Li
- Laboratory of Physical Chemistry and Colloid Science, Dreijenplein 6, 6703 HB Wageningen, The Netherlands, TNO Nutrition and Food Research, Utrechtseweg 48, 3704HE Zeist, The Netherlands, and University Medical Center Groningen and University of Groningen, A. Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Renko de Vries
- Laboratory of Physical Chemistry and Colloid Science, Dreijenplein 6, 6703 HB Wageningen, The Netherlands, TNO Nutrition and Food Research, Utrechtseweg 48, 3704HE Zeist, The Netherlands, and University Medical Center Groningen and University of Groningen, A. Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Mieke Kleijn
- Laboratory of Physical Chemistry and Colloid Science, Dreijenplein 6, 6703 HB Wageningen, The Netherlands, TNO Nutrition and Food Research, Utrechtseweg 48, 3704HE Zeist, The Netherlands, and University Medical Center Groningen and University of Groningen, A. Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Ted Slaghek
- Laboratory of Physical Chemistry and Colloid Science, Dreijenplein 6, 6703 HB Wageningen, The Netherlands, TNO Nutrition and Food Research, Utrechtseweg 48, 3704HE Zeist, The Netherlands, and University Medical Center Groningen and University of Groningen, A. Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Johan Timmermans
- Laboratory of Physical Chemistry and Colloid Science, Dreijenplein 6, 6703 HB Wageningen, The Netherlands, TNO Nutrition and Food Research, Utrechtseweg 48, 3704HE Zeist, The Netherlands, and University Medical Center Groningen and University of Groningen, A. Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Martien Cohen Stuart
- Laboratory of Physical Chemistry and Colloid Science, Dreijenplein 6, 6703 HB Wageningen, The Netherlands, TNO Nutrition and Food Research, Utrechtseweg 48, 3704HE Zeist, The Netherlands, and University Medical Center Groningen and University of Groningen, A. Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Willem Norde
- Laboratory of Physical Chemistry and Colloid Science, Dreijenplein 6, 6703 HB Wageningen, The Netherlands, TNO Nutrition and Food Research, Utrechtseweg 48, 3704HE Zeist, The Netherlands, and University Medical Center Groningen and University of Groningen, A. Deusinglaan 1, 9713 AV Groningen, The Netherlands
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Blasi L, Argentiere S, Morello G, Palamà I, Barbarella G, Cingolani R, Gigli G. Uptake and distribution of labeled antibodies into pH-sensitive microgels. Acta Biomater 2010; 6:2148-56. [PMID: 20026438 DOI: 10.1016/j.actbio.2009.12.031] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2009] [Revised: 11/06/2009] [Accepted: 12/15/2009] [Indexed: 11/29/2022]
Abstract
We investigated the uptake and release of labeled antibodies from pH-sensitive hydrogel microparticles (i.e. microgels) by means of fluorescence analysis of labeled biological samples. The poly(methacrylic acid) (PMAA) hydrogel is a carbon-based network having carboxylic groups on the surface that dissociate according to their acid-base equilibrium. The ability of the PMAA microgel to encapsulate and release anti-CD4 and anti-CD8 monoclonal antibodies (MAbs), differing for the isotype and labeled with highly photostable fluorophore, was studied in solution by photoluminescence spectroscopy. The experimental results indicated that the uptake and release of the tested antibodies were controlled by pH. Furthermore, confocal microscopy analysis in the solid state revealed that the distribution of the labeled antibodies either on the surface or in the core of the microgel matrix was related to the specific properties of these MAbs.
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Affiliation(s)
- L Blasi
- NNL, National Nanotechnology Laboratory of CNR-INFM, Distretto Tecnologico ISUFI, Dipartimento di Ingegneria dell'Innovazione, Università del Salento, Via Arnesano Km 5, I-73100 Lecce, Italy.
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29
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Bysell H, Hansson P, Malmsten M. Effect of Charge Density on the Interaction between Cationic Peptides and Oppositely Charged Microgels. J Phys Chem B 2010; 114:7207-15. [DOI: 10.1021/jp1016664] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Helena Bysell
- Department of Pharmacy, Uppsala University, P.O. Box 580, SE-751 23 Uppsala, Sweden
| | - Per Hansson
- Department of Pharmacy, Uppsala University, P.O. Box 580, SE-751 23 Uppsala, Sweden
| | - Martin Malmsten
- Department of Pharmacy, Uppsala University, P.O. Box 580, SE-751 23 Uppsala, Sweden
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30
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Bysell H, Hansson P, Schmidtchen A, Malmsten M. Effect of Hydrophobicity on the Interaction between Antimicrobial Peptides and Poly(acrylic acid) Microgels. J Phys Chem B 2010; 114:1307-13. [DOI: 10.1021/jp910068t] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Helena Bysell
- Department of Pharmacy, Uppsala University, P.O. Box 580, SE-751 23 Uppsala, Sweden, Section of Dermatology and Venereology, Department of Clinical Sciences, Lund University, SE-221 84 Lund, Sweden
| | - Per Hansson
- Department of Pharmacy, Uppsala University, P.O. Box 580, SE-751 23 Uppsala, Sweden, Section of Dermatology and Venereology, Department of Clinical Sciences, Lund University, SE-221 84 Lund, Sweden
| | - Artur Schmidtchen
- Department of Pharmacy, Uppsala University, P.O. Box 580, SE-751 23 Uppsala, Sweden, Section of Dermatology and Venereology, Department of Clinical Sciences, Lund University, SE-221 84 Lund, Sweden
| | - Martin Malmsten
- Department of Pharmacy, Uppsala University, P.O. Box 580, SE-751 23 Uppsala, Sweden, Section of Dermatology and Venereology, Department of Clinical Sciences, Lund University, SE-221 84 Lund, Sweden
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31
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Bysell H, Schmidtchen A, Malmsten M. Binding and release of consensus peptides by poly(acrylic acid) microgels. Biomacromolecules 2009; 10:2162-8. [PMID: 19583241 DOI: 10.1021/bm9003354] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The interaction between positively charged consensus peptides and poly(acrylic acid) microgels was investigated with micromanipulator-assisted light microscopy and confocal laser scanning microscopy. Peptide binding and release was monitored by microgel deswelling and swelling for monodisperse multiples of heparin-binding Cardin and Weintraub motifs, (AKKARA)(n) (1 <or= n <or= 4) and (ARKKAAKA)(n) (1 <or= n <or= 3), as well as the corresponding titratable (AHHAHA)(4) and (AHHHAAHA)(3) peptides (A, K, R and H, refering to alanine, lysine, arginine, and histidine, respectively). When fully charged, these peptides distribute homogenously throughout the microgels and display concentration-dependent deswelling, which increases with increasing peptide length. Both (AKKARA)(4) and (ARKKAAKA)(3) display potent and fast microgel deswelling but only marginal subsequent electrolyte-induced desorption. In contrast, reducing the peptide charge for (AHHAHA)(4) and (AHHHAAHA)(3) at neutral and high pH, or the peptide length, substantially reduces the peptide affinity for the microgels and facilitates rapid peptide release. Taken together, the results also show that quite short peptides of moderate charge density interact strongly and cause extensive gel deswelling of oppositely charged microgels, precluding peptide release. They also show, however, that desirable triggered release can be achieved with peptides of lower charge density.
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Affiliation(s)
- Helena Bysell
- Department of Pharmacy, Uppsala University, SE-751 23 Uppsala, Sweden.
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32
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Hansson P. Surfactant Self-Assembly in Oppositely Charged Polymer Networks. Theory. J Phys Chem B 2009; 113:12903-15. [DOI: 10.1021/jp904866t] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Per Hansson
- Department of Pharmacy, Biomedical Centre, Uppsala University, Box 580, SE-75123 Uppsala, Sweden
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Ganguli S, Yoshimoto K, Tomita S, Sakuma H, Matsuoka T, Shiraki K, Nagasaki Y. Regulation of Lysozyme Activity Based on Thermotolerant Protein/Smart Polymer Complex Formation. J Am Chem Soc 2009; 131:6549-53. [DOI: 10.1021/ja900786z] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sumon Ganguli
- Graduate School of Pure and Applied Science, University of Tsukuba, 1-1-1 Ten-noudai, Tsukuba, Ibaraki 305-8573, Japan, Center for Tsukuba Advanced Research Alliance (TARA), University of Tsukuba, Ten-noudai 1-1-1, Tsukuba 305-8577, Japan, Tsukuba Research Center for Interdisciplinary Materials Science (TIMS), University of Tsukuba, 1-1-1 Ten-noudai, Tsukuba, Ibaraki 305-8571, Japan, Master’s School of Medical Science, Graduate School of Comprehensive Human Sciences, University of Tsukuba, 1-1-1 Ten
| | - Keitaro Yoshimoto
- Graduate School of Pure and Applied Science, University of Tsukuba, 1-1-1 Ten-noudai, Tsukuba, Ibaraki 305-8573, Japan, Center for Tsukuba Advanced Research Alliance (TARA), University of Tsukuba, Ten-noudai 1-1-1, Tsukuba 305-8577, Japan, Tsukuba Research Center for Interdisciplinary Materials Science (TIMS), University of Tsukuba, 1-1-1 Ten-noudai, Tsukuba, Ibaraki 305-8571, Japan, Master’s School of Medical Science, Graduate School of Comprehensive Human Sciences, University of Tsukuba, 1-1-1 Ten
| | - Shunsuke Tomita
- Graduate School of Pure and Applied Science, University of Tsukuba, 1-1-1 Ten-noudai, Tsukuba, Ibaraki 305-8573, Japan, Center for Tsukuba Advanced Research Alliance (TARA), University of Tsukuba, Ten-noudai 1-1-1, Tsukuba 305-8577, Japan, Tsukuba Research Center for Interdisciplinary Materials Science (TIMS), University of Tsukuba, 1-1-1 Ten-noudai, Tsukuba, Ibaraki 305-8571, Japan, Master’s School of Medical Science, Graduate School of Comprehensive Human Sciences, University of Tsukuba, 1-1-1 Ten
| | - Hiroshi Sakuma
- Graduate School of Pure and Applied Science, University of Tsukuba, 1-1-1 Ten-noudai, Tsukuba, Ibaraki 305-8573, Japan, Center for Tsukuba Advanced Research Alliance (TARA), University of Tsukuba, Ten-noudai 1-1-1, Tsukuba 305-8577, Japan, Tsukuba Research Center for Interdisciplinary Materials Science (TIMS), University of Tsukuba, 1-1-1 Ten-noudai, Tsukuba, Ibaraki 305-8571, Japan, Master’s School of Medical Science, Graduate School of Comprehensive Human Sciences, University of Tsukuba, 1-1-1 Ten
| | - Tsuneyoshi Matsuoka
- Graduate School of Pure and Applied Science, University of Tsukuba, 1-1-1 Ten-noudai, Tsukuba, Ibaraki 305-8573, Japan, Center for Tsukuba Advanced Research Alliance (TARA), University of Tsukuba, Ten-noudai 1-1-1, Tsukuba 305-8577, Japan, Tsukuba Research Center for Interdisciplinary Materials Science (TIMS), University of Tsukuba, 1-1-1 Ten-noudai, Tsukuba, Ibaraki 305-8571, Japan, Master’s School of Medical Science, Graduate School of Comprehensive Human Sciences, University of Tsukuba, 1-1-1 Ten
| | - Kentaro Shiraki
- Graduate School of Pure and Applied Science, University of Tsukuba, 1-1-1 Ten-noudai, Tsukuba, Ibaraki 305-8573, Japan, Center for Tsukuba Advanced Research Alliance (TARA), University of Tsukuba, Ten-noudai 1-1-1, Tsukuba 305-8577, Japan, Tsukuba Research Center for Interdisciplinary Materials Science (TIMS), University of Tsukuba, 1-1-1 Ten-noudai, Tsukuba, Ibaraki 305-8571, Japan, Master’s School of Medical Science, Graduate School of Comprehensive Human Sciences, University of Tsukuba, 1-1-1 Ten
| | - Yukio Nagasaki
- Graduate School of Pure and Applied Science, University of Tsukuba, 1-1-1 Ten-noudai, Tsukuba, Ibaraki 305-8573, Japan, Center for Tsukuba Advanced Research Alliance (TARA), University of Tsukuba, Ten-noudai 1-1-1, Tsukuba 305-8577, Japan, Tsukuba Research Center for Interdisciplinary Materials Science (TIMS), University of Tsukuba, 1-1-1 Ten-noudai, Tsukuba, Ibaraki 305-8571, Japan, Master’s School of Medical Science, Graduate School of Comprehensive Human Sciences, University of Tsukuba, 1-1-1 Ten
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Johansson C, Hansson P, Malmsten M. Mechanism of Lysozyme Uptake in Poly(acrylic acid) Microgels. J Phys Chem B 2009; 113:6183-93. [DOI: 10.1021/jp900706k] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Christian Johansson
- Department of Pharmacy, Uppsala University, P.O. Box 580, SE-751 23 Uppsala, Sweden
| | - Per Hansson
- Department of Pharmacy, Uppsala University, P.O. Box 580, SE-751 23 Uppsala, Sweden
| | - Martin Malmsten
- Department of Pharmacy, Uppsala University, P.O. Box 580, SE-751 23 Uppsala, Sweden
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Bysell H, Malmsten M. Interactions between homopolypeptides and lightly cross-linked microgels. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:522-528. [PMID: 19061315 DOI: 10.1021/la8029984] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The relative importance of electrostatic and nonelectrostatic interactions in peptide-microgel systems was evaluated by micromanipulator-assisted light microscopy, confocal microscopy, and circular dichroism. For this purpose, the interaction of various homopolypeptides with lightly cross-linked polyelectrolyte gel particles ( approximately 70 microm in diameter) was studied with focus on peptide-induced microgel deswelling and its relation to peptide distribution within the microgel particles. Negatively charged poly-l-glutamic acid (pGlu) and poly-l-aspartic acid (pAsp), as well as uncharged poly-l-proline (pPro) and poly-l-threonine (pThr), were found to not bind to negatively charged poly(acrylic acid) microgels under the conditions investigated, but were instead depleted from the microgel particles. Positively charged poly-l-arginine (pArg), poly-l-histidine (pHis), and poly-l-lysine (pLys), on the other hand, interacted strongly with the oppositely charged microgel particles and caused significant deswelling of these. In parallel, cationic acrylamidopropyltriethylammoniumchloride (APTAC) microgels bound negatively charged polypeptides to a much higher extent than positively charged and uncharged ones. These findings suggest that electrostatic interactions dominate peptide binding and resulting microgel deswelling in these systems. Nevertheless, although the amount of cationic peptide bound to the anionic microgel particles was similar for cationic pLys, pArg, and pHis, peptide-induced gel deswelling differed significantly, as did the change in peptide conformation after microgel binding and the peptide distribution within the microgels. These effects, as well as pH dependent binding and release of titrable pHis, are discussed in terms of the effects of the charge density of, and structural differences between, the cationic homopolypeptides on the interaction with the oppositely charged microgel particles.
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Affiliation(s)
- Helena Bysell
- Department of Pharmacy, Uppsala University, P.O. Box 580, SE-751 23 Uppsala, Sweden
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Transport of poly-l-lysine into oppositely charged poly(acrylic acid) microgels and its effect on gel deswelling. J Colloid Interface Sci 2008; 323:60-9. [DOI: 10.1016/j.jcis.2008.03.003] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2008] [Revised: 03/04/2008] [Accepted: 03/04/2008] [Indexed: 11/23/2022]
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