1
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Traldi F, Resmini M. Impact of Protein Corona Formation on the Thermoresponsive Behavior of Acrylamide-Based Nanogels. Biomacromolecules 2024; 25:1340-1350. [PMID: 38242644 PMCID: PMC10865348 DOI: 10.1021/acs.biomac.3c01405] [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] [Received: 12/18/2023] [Revised: 01/09/2024] [Accepted: 01/09/2024] [Indexed: 01/21/2024]
Abstract
The ability to fine-tune the volume phase transition temperature (VPTT) of thermoresponsive nanoparticles is essential to their successful application in drug delivery. The rational design of these materials is limited by our understanding of the impact that nanoparticle-protein interactions have on their thermoresponsive behavior. In this work, we demonstrate how the formation of protein corona impacts the transition temperature values of acrylamide-based nanogels and their reversibility characteristics, in the presence of lysozyme, given its relevance for the ocular and intranasal administration route. Nanogels were synthesized with N-isopropylacrylamide or N-n-propylacrylamide as backbone monomers, methylenebis(acrylamide) (2.5-20 molar %) as a cross-linker, and functionalized with negatively charged monomers 2-acrylamido-2-methylpropanesulfonic acid, N-acryloyl-l-proline, or acrylic acid; characterization showed comparable particle diameter (c.a.10 nm), but formulation-dependent thermoresponsive properties, in the range 28-54 °C. Lysozyme was shown to form a complex with the negatively charged nanogels, lowering their VPTT values; the hydrophilic nature of the charged comonomer controlled the drop in VPTT upon complex formation, while matrix rigidity only had a small, yet significant effect. The cross-linker content was found to play a major role in determining the reversibility of the temperature-dependent transition of the complexes, with only 20 molar % cross-linked-nanogels displaying a fully reversible transition. These results demonstrate the importance of evaluating protein corona formation in the development of drug delivery systems based on thermoresponsive nanoparticles.
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Affiliation(s)
- Federico Traldi
- Department of Chemistry, SPCS, Queen Mary University of London, London E1 4NS, U.K.
| | - Marina Resmini
- Department of Chemistry, SPCS, Queen Mary University of London, London E1 4NS, U.K.
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2
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Choi H, Hong Y, Najafi S, Kim SY, Shea J, Hwang DS, Choi YS. Spontaneous Transition of Spherical Coacervate to Vesicle-Like Compartment. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2305978. [PMID: 38063842 PMCID: PMC10870063 DOI: 10.1002/advs.202305978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 11/12/2023] [Indexed: 02/17/2024]
Abstract
Numerous biological systems contain vesicle-like biomolecular compartments without membranes, which contribute to diverse functions including gene regulation, stress response, signaling, and skin barrier formation. Coacervation, as a form of liquid-liquid phase separation (LLPS), is recognized as a representative precursor to the formation and assembly of membrane-less vesicle-like structures, although their formation mechanism remains unclear. In this study, a coacervation-driven membrane-less vesicle-like structure is constructed using two proteins, GG1234 (an anionic intrinsically disordered protein) and bhBMP-2 (a bioengineered human bone morphogenetic protein 2). GG1234 formed both simple coacervates by itself and complex coacervates with the relatively cationic bhBMP-2 under acidic conditions. Upon addition of dissolved bhBMP-2 to the simple coacervates of GG1234, a phase transition from spherical simple coacervates to vesicular condensates occurred via the interactions between GG1234 and bhBMP-2 on the surface of the highly viscoelastic GG1234 simple coacervates. Furthermore, the shell structure in the outer region of the GG1234/bhBMP-2 vesicular condensates exhibited gel-like properties, leading to the formation of multiphasic vesicle-like compartments. A potential mechanism is proposed for the formation of the membrane-less GG1234/bhBMP-2 vesicle-like compartments. This study provides a dynamic process underlying the formation of biomolecular multiphasic condensates, thereby enhancing the understanding of these biomolecular structures.
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Affiliation(s)
- Hyunsuk Choi
- Department of Chemical Engineering and Applied ChemistryChungnam National UniversityDaejeon34134South Korea
| | - Yuri Hong
- Division of Environmental Science and EngineeringPohang University of Science and Technology (POSTECH)Pohang37673South Korea
| | - Saeed Najafi
- Department of Chemistry and BiochemistryUniversity of CaliforniaSanta BarbaraCA93106USA
| | - Sun Young Kim
- Department of Chemical Engineering and Applied ChemistryChungnam National UniversityDaejeon34134South Korea
| | - Joan‐Emma Shea
- Department of Chemistry and BiochemistryUniversity of CaliforniaSanta BarbaraCA93106USA
| | - Dong Soo Hwang
- Division of Environmental Science and EngineeringPohang University of Science and Technology (POSTECH)Pohang37673South Korea
| | - Yoo Seong Choi
- Department of Chemical Engineering and Applied ChemistryChungnam National UniversityDaejeon34134South Korea
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3
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Díaz JC, Giménez-Marqués M. Alternative protein encapsulation with MOFs: overcoming the elusive mineralization of HKUST-1 in water. Chem Commun (Camb) 2023; 60:51-54. [PMID: 37991417 DOI: 10.1039/d3cc04320g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2023]
Abstract
Protein encapsulation by in situ formation of MOFs is a valuable strategy to immobilise and protect these bioentities. However the required biocompatible conditions limits the scope of MOFs under investigation, particularly in the case of hydrolytically unstable MOFs such as HKUST-1. We report alternative synthetic procedures to obtain protein@HKUST-1 biocomposites from related Cu-BTC dense biocomposites. pH dependent dense phase precursors are first obtained and their transformations into HKUST-1 are characterized. Encapsulation efficiency is affected by the protein's nature, and can be modulated by the sequential or simultaneous addition of MOF precursors.
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Affiliation(s)
- Jesús Cases Díaz
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Catedrático José Beltrán 2, 46980 Paterna, Valencia, Spain.
| | - Mónica Giménez-Marqués
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Catedrático José Beltrán 2, 46980 Paterna, Valencia, Spain.
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4
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Yang R, Kvetny M, Brown W, Ogbonna EN, Wang G. A Single-Entity Method for Actively Controlled Nucleation and High-Quality Protein Crystal Synthesis. Anal Chem 2023. [PMID: 37243709 DOI: 10.1021/acs.analchem.3c00175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Lack of controls and understanding in nucleation, which proceeds crystal growth and other phase transitions, has been a bottleneck challenge in chemistry, materials, biology, and other fields. The exemplary needs for better methods for biomacromolecule crystallization include (1) synthesizing crystals for high-resolution structure determinations in fundamental research and (2) tuning the crystal habit and thus the corresponding properties in materials and pharmaceutical applications. Herein, a deterministic method is established capable of sustaining the nucleation and growth of a single crystal using the protein lysozyme as a prototype. The supersaturation is localized at the interface between a sample and a precipitant solution, spatially confined by the tip of a single nanopipette. The exchange of matter between the two solutions determines the supersaturation, which is controlled by electrokinetic ion transport driven by an external potential waveform. Nucleation and subsequent crystal growth disrupt the ionic current limited by the nanotip and are detected. The nucleation and growth of individual single crystals are measured in real time. Electroanalytical and optical signatures are elucidated as feedbacks with which active controls in crystal quality and method consistency are achieved: five out of five crystals diffract at a true atomic resolution of up to 1.2 Å. As controls, those synthesized under less optimized conditions diffract poorly. The crystal habits during the growth process are tuned successfully by adjusting the flux. The universal mechanism of nano-transport kinetics, together with the correlations of the diffraction quality and crystal habit with the crystallization control parameters, lay the foundation for the generalization to other materials systems.
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Affiliation(s)
- Ruoyu Yang
- Department of Chemistry, Georgia State University, Atlanta, Georgia 30302, United States
| | - Maksim Kvetny
- Department of Chemistry, Georgia State University, Atlanta, Georgia 30302, United States
| | - Warren Brown
- Department of Chemistry, Georgia State University, Atlanta, Georgia 30302, United States
| | - Edwin N Ogbonna
- Department of Chemistry, Georgia State University, Atlanta, Georgia 30302, United States
| | - Gangli Wang
- Department of Chemistry, Georgia State University, Atlanta, Georgia 30302, United States
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5
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Joosten N, Wyrębak W, Schenning A, Nijmeijer K, Borneman Z. On the Performance of a Ready-to-Use Electrospun Sulfonated Poly(Ether Ether Ketone) Membrane Adsorber. MEMBRANES 2023; 13:543. [PMID: 37367747 DOI: 10.3390/membranes13060543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 05/17/2023] [Accepted: 05/18/2023] [Indexed: 06/28/2023]
Abstract
Motivated by the need for efficient purification methods for the recovery of valuable resources, we developed a wire-electrospun membrane adsorber without the need for post-modification. The relationship between the fiber structure, functional-group density, and performance of electrospun sulfonated poly(ether ether ketone) (sPEEK) membrane adsorbers was explored. The sulfonate groups enable selective binding of lysozyme at neutral pH through electrostatic interactions. Our results show a dynamic lysozyme adsorption capacity of 59.3 mg/g at 10% breakthrough, which is independent of the flow velocity confirming dominant convective mass transport. Membrane adsorbers with three different fiber diameters (measured by SEM) were fabricated by altering the concentration of the polymer solution. The specific surface area as measured with BET and the dynamic adsorption capacity were minimally affected by variations in fiber diameter, offering membrane adsorbers with consistent performance. To study the effect of functional-group density, membrane adsorbers from sPEEK with different sulfonation degrees (52%, 62%, and 72%) were fabricated. Despite the increased functional-group density, the dynamic adsorption capacity did not increase accordingly. However, in all presented cases, at least a monolayer coverage was obtained, demonstrating ample functional groups available within the area occupied by a lysozyme molecule. Our study showcases a ready-to-use membrane adsorber for the recovery of positively charged molecules, using lysozyme as a model protein, with potential applications in removing heavy metals, dyes, and pharmaceutical components from process streams. Furthermore, this study highlights factors, such as fiber diameter and functional-group density, for optimizing the membrane adsorber's performance.
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Affiliation(s)
- Niki Joosten
- Membrane Materials and Processes, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
- Stimuli-responsive Functional Materials and Devices, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
- Wetsus, European Centre of Excellence for Sustainable Water Technology, Oostergoweg 9, 8911 MA Leeuwarden, The Netherlands
| | - Weronika Wyrębak
- Membrane Materials and Processes, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
| | - Albert Schenning
- Stimuli-responsive Functional Materials and Devices, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
| | - Kitty Nijmeijer
- Membrane Materials and Processes, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
| | - Zandrie Borneman
- Membrane Materials and Processes, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
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6
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Rahman MM, Pires RS, Herneke A, Gowda V, Langton M, Biverstål H, Lendel C. Food protein-derived amyloids do not accelerate amyloid β aggregation. Sci Rep 2023; 13:985. [PMID: 36720893 PMCID: PMC9889329 DOI: 10.1038/s41598-023-28147-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Accepted: 01/13/2023] [Indexed: 02/01/2023] Open
Abstract
The deposition of proteins in the form of amyloid fibrils is closely associated with several serious diseases. The events that trigger the conversion from soluble functional proteins into insoluble amyloid are not fully understood. Many proteins that are not associated with disease can form amyloid with similar structural characteristics as the disease-associated fibrils, which highlights the potential risk of cross-seeding of disease amyloid by amyloid-like structures encountered in our surrounding. Of particular interest are common food proteins that can be transformed into amyloid under conditions similar to cooking. We here investigate cross-seeding of amyloid-β (Aβ), a peptide known to form amyloid during the development of Alzheimer's disease, by 16 types of amyloid fibrils derived from food proteins or peptides. Kinetic studies using thioflavin T fluorescence as output show that none of the investigated protein fibrils accelerates the aggregation of Aβ. In at least two cases (hen egg lysozyme and oat protein isolate) we observe retardation of the aggregation, which appears to originate from interactions between the food protein seeds and Aβ in aggregated form. The results support the view that food-derived amyloid is not a risk factor for development of Aβ pathology and Alzheimer's disease.
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Affiliation(s)
- M Mahafuzur Rahman
- Department of Chemistry, KTH Royal Institute of Technology, Teknikringen 30, 100 44, Stockholm, Sweden
| | - Rodrigo Sanches Pires
- Department of Chemistry, KTH Royal Institute of Technology, Teknikringen 30, 100 44, Stockholm, Sweden
| | - Anja Herneke
- Department of Molecular Sciences, Swedish University of Agricultural Sciences, BioCentrum, Almas Allé 5, 756 61, Uppsala, Sweden
| | - Vasantha Gowda
- Department of Chemistry, KTH Royal Institute of Technology, Teknikringen 30, 100 44, Stockholm, Sweden
| | - Maud Langton
- Department of Molecular Sciences, Swedish University of Agricultural Sciences, BioCentrum, Almas Allé 5, 756 61, Uppsala, Sweden
| | - Henrik Biverstål
- Department of Biosciences and Nutrition, Karolinska Institutet, NEO/Floor 8, Blickgången 16, 141 52, Huddinge, Sweden
| | - Christofer Lendel
- Department of Chemistry, KTH Royal Institute of Technology, Teknikringen 30, 100 44, Stockholm, Sweden.
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7
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Waggoner LE, Kang J, Zuidema JM, Vijayakumar S, Hurtado AA, Sailor MJ, Kwon EJ. Porous Silicon Nanoparticles Targeted to the Extracellular Matrix for Therapeutic Protein Delivery in Traumatic Brain Injury. Bioconjug Chem 2022; 33:1685-1697. [PMID: 36017941 PMCID: PMC9492643 DOI: 10.1021/acs.bioconjchem.2c00305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Traumatic brain injury (TBI) is a major cause of disability and death among children and young adults in the United States, yet there are currently no treatments that improve the long-term brain health of patients. One promising therapeutic for TBI is brain-derived neurotrophic factor (BDNF), a protein that promotes neurogenesis and neuron survival. However, outstanding challenges to the systemic delivery of BDNF are its instability in blood, poor transport into the brain, and short half-life in circulation and brain tissue. Here, BDNF is encapsulated into an engineered, biodegradable porous silicon nanoparticle (pSiNP) in order to deliver bioactive BDNF to injured brain tissue after TBI. The pSiNP carrier is modified with the targeting ligand CAQK, a peptide that binds to extracellular matrix components upregulated after TBI. The protein cargo retains bioactivity after release from the pSiNP carrier, and systemic administration of the CAQK-modified pSiNPs results in effective delivery of the protein cargo to injured brain regions in a mouse model of TBI. When administered after injury, the CAQK-targeted pSiNP delivery system for BDNF reduces lesion volumes compared to free BDNF, supporting the hypothesis that pSiNPs mediate therapeutic protein delivery after systemic administration to improve outcomes in TBI.
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Affiliation(s)
- Lauren E. Waggoner
- Department of Nanoengineering, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Jinyoung Kang
- Department of Nanoengineering, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Jonathan M. Zuidema
- Department of Chemistry & Biochemistry, University of California, San Diego, La Jolla, CA, 92093, USA
- Department of Neuroscience, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Sanahan Vijayakumar
- Department of Chemistry & Biochemistry, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Alan A. Hurtado
- Department of Bioengineering, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Michael J. Sailor
- Department of Nanoengineering, University of California, San Diego, La Jolla, CA, 92093, USA
- Department of Chemistry & Biochemistry, University of California, San Diego, La Jolla, CA, 92093, USA
- Department of Bioengineering, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Ester J. Kwon
- Department of Bioengineering, University of California, San Diego, La Jolla, CA, 92093, USA
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8
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Liu J, Zhorabek F, Zhang T, Lam JWY, Tang BZ, Chau Y. Multifaceted Cargo Recruitment and Release from Artificial Membraneless Organelles. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2201721. [PMID: 35596607 DOI: 10.1002/smll.202201721] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 04/15/2022] [Indexed: 06/15/2023]
Abstract
Liquid-liquid phase separation (LLPS) drives membraneless organelles (MLOs) formation for organizing biomolecules. Artificial MLOs (AMLOs) have been constructed mostly via the LLPS of engineered proteins capable of regulating limited types of biomolecules. Here, leveraging a minimalist AMLO, driven by LLPS of polymer-oligopeptide hybrids, enrichment, recruitment, and release of multifaceted cargoes are quantitatively shown, including small fluorescent molecules, fluorophore-containing macromolecules, proteins, DNAs, and RNAs. Cargoes show up to 105 -fold enrichment, whilst recruitment and release are triggered by variations of temperature, pH, and/or ionic strength. Also, the first efficacious, rapid, and reversible control of aggregation-induced emission with over 30 folds of modulation of overall fluorescence intensity is achieved, by intensifying the aggregation of luminogens in AMLO. The AMLO is a simple yet versatile platform for potential drug delivery and biosensor applications.
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Affiliation(s)
- Jianhui Liu
- Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, P. R. China
| | - Fariza Zhorabek
- Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, P. R. China
| | - Tianfu Zhang
- Department of Chemistry and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, P. R. China
| | - Jacky W Y Lam
- Department of Chemistry and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, P. R. China
| | - Ben Zhong Tang
- Department of Chemistry and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, P. R. China
- School of Science and Engineering, Shenzhen Key Laboratory of Functional Aggregate Materials, The Chinese University of Hong Kong, Shenzhen, Shenzhen City, Guangdong, 518172, P. R. China
| | - Ying Chau
- Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, P. R. China
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9
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Gonzalez Solveyra E, Thompson DH, Szleifer I. Proteins Adsorbing onto Surface-Modified Nanoparticles: Effect of Surface Curvature, pH, and the Interplay of Polymers and Proteins Acid-Base Equilibrium. Polymers (Basel) 2022; 14:739. [PMID: 35215653 PMCID: PMC8878797 DOI: 10.3390/polym14040739] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 02/03/2022] [Accepted: 02/06/2022] [Indexed: 02/05/2023] Open
Abstract
Protein adsorption onto nanomaterials is a process of vital significance and it is commonly controlled by functionalizing their surface with polymers. The efficiency of this strategy depends on the design parameters of the nanoconstruct. Although significant amount of work has been carried out on planar surfaces modified with different types of polymers, studies investigating the role of surface curvature are not as abundant. Here, we present a comprehensive and systematic study of the protein adsorption process, analyzing the effect of curvature and morphology, the grafting of polymer mixtures, the type of monomer (neutral, acidic, basic), the proteins in solution, and the conditions of the solution. The theoretical approach we employed is based on a molecular theory that allows to explicitly consider the acid-base reactions of the amino acids in the proteins and the monomers on the surface. The calculations showed that surface curvature modulates the molecular organization in space, but key variables are the bulk pH and salt concentration (in the millimolar range). When grafting the NP with acidic or basic polymers, the surface coating could disfavor or promote adsorption, depending on the solution's conditions. When NPs are in contact with protein mixtures in solution, a nontrivial competitive adsorption process is observed. The calculations reflect the balance between molecular organization and chemical state of polymers and proteins, and how it is modulated by the curvature of the underlying surface.
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Affiliation(s)
- Estefania Gonzalez Solveyra
- Instituto de Nanosistemas, Universidad Nacional de San Martín-CONICET, San Martín, Buenos Aires B1650, Argentina;
| | - David H. Thompson
- Bindley Bioscience Center, Department of Chemistry, Multi-Disciplinary Cancer Research Facility, Purdue University, West Lafayette, IN 47907, USA;
| | - Igal Szleifer
- Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, USA
- Chemistry of Life Processes Institute, Northwestern University, Evanston, IL 60208, USA
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA
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10
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Ahmed MA, Erdőssy J, Horvath V. Temperature-Responsive Magnetic Nanoparticles for Bioanalysis of Lysozyme in Urine Samples. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:3015. [PMID: 34835779 PMCID: PMC8618479 DOI: 10.3390/nano11113015] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 11/02/2021] [Accepted: 11/05/2021] [Indexed: 12/26/2022]
Abstract
Highly selective multifunctional magnetic nanoparticles containing a thermoresponsive polymer shell were developed and used in the sample pretreatment of urine for the assessment of lysozymuria in leukemia patients. Crosslinked poly(N-isopropylacrylamide-co-acrylic acid-co-N-tert-butylacrylamide) was grown onto silica-coated magnetic nanoparticles by reversible addition fragmentation chain transfer (RAFT) polymerization. The lysozyme binding property of the nanoparticles was investigated as a function of time, protein concentration, pH, ionic strength and temperature and their selectivity was assessed against other proteins. High-abundant proteins, like human serum albumin and γ-globulins did not interfere with the binding of lysozyme even at elevated concentrations characteristic of proteinuria. A sample cleanup procedure for urine samples has been developed utilizing the thermocontrollable protein binding ability of the nanoparticles. Method validation was carried out according to current bioanalytical method validation guidelines. The method was highly selective, and the calibration was linear in the 25 to 1000 µg/mL concentration range, relevant in the diagnosis of monocytic and myelomonocytic leukemia. Intra- and inter-day precision values ranged from 2.24 to 8.20% and 1.08 to 5.04%, respectively. Intra-day accuracies were between 89.9 and 117.6%, while inter-day accuracies were in the 88.8 to 111.0% range. The average recovery was 94.1 ± 8.1%. Analysis of unknown urine samples in comparison with a well-established reference method revealed very good correlation between the results, indicating that the new nanoparticle-based method has high potential in the diagnosis of lysozymuria.
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Affiliation(s)
- Marwa A. Ahmed
- Department of Inorganic and Analytical Chemistry, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, H-1111 Budapest, Hungary; (M.A.A.); (J.E.)
- Department of Chemistry, Faculty of Science, Arish University, El-Arish 45511, Egypt
| | - Júlia Erdőssy
- Department of Inorganic and Analytical Chemistry, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, H-1111 Budapest, Hungary; (M.A.A.); (J.E.)
| | - Viola Horvath
- Department of Inorganic and Analytical Chemistry, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, H-1111 Budapest, Hungary; (M.A.A.); (J.E.)
- MTA-BME Computation Driven Chemistry Research Group, H-1111 Budapest, Hungary
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11
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12
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Capocefalo A, Deckert-Gaudig T, Brasili F, Postorino P, Deckert V. Unveiling the interaction of protein fibrils with gold nanoparticles by plasmon enhanced nano-spectroscopy. NANOSCALE 2021; 13:14469-14479. [PMID: 34473176 DOI: 10.1039/d1nr03190b] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The development of various degenerative diseases is suggested to be triggered by the uncontrolled organisation and aggregation of proteins into amyloid fibrils. For this reason, there are ongoing efforts to develop novel agents and approaches, including metal nanoparticle-based colloids, that dissolve amyloid structures and prevent pathogenic protein aggregation. In this contribution, the role of gold nanoparticles (AuNPs) in degrading amyloid fibrils of the model protein lysozyme is investigated. The amino acid composition of fibril surfaces before and after the incubation with AuNPs is determined at the single fibril level by exploiting the high spatial resolution and sensitivity provided by tip-enhanced and surface-enhanced Raman spectroscopies. This combined spectroscopic approach allows to reveal the molecular mechanisms driving the interaction between fibrils and AuNPs. Our results provide an important input for the understanding of amyloid fibrils and could have a potential translational impact on the development of strategies for the prevention and treatment of amyloid-related diseases.
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Affiliation(s)
- Angela Capocefalo
- Dipartimento di Fisica, Sapienza Università di Roma, P. le Aldo Moro 5, Roma, Italy
- CNR-ISC, Istituto dei Sistemi Complessi, c/o Sapienza Università di Roma, P.le Aldo Moro 5, 00185 Roma, Italy
| | - Tanja Deckert-Gaudig
- Leibniz Institute of Photonic Technology (IPHT), Albert-Einstein-Str. 9, 07745 Jena, Germany.
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich-Schiller-University, Jena Helmholtzweg 4, 07743 Jena, Germany
| | - Francesco Brasili
- Dipartimento di Fisica, Sapienza Università di Roma, P. le Aldo Moro 5, Roma, Italy
| | - Paolo Postorino
- Dipartimento di Fisica, Sapienza Università di Roma, P. le Aldo Moro 5, Roma, Italy
| | - Volker Deckert
- Leibniz Institute of Photonic Technology (IPHT), Albert-Einstein-Str. 9, 07745 Jena, Germany.
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich-Schiller-University, Jena Helmholtzweg 4, 07743 Jena, Germany
- Institute of Quantum Science and Engineering, Texas A&M University, College Station, TX 77843-4242, USA
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13
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Tournois M, Mathé S, André I, Esque J, Fernández MA. Surface charge distribution: a key parameter for understanding protein behavior in chromatographic processes. J Chromatogr A 2021; 1648:462151. [PMID: 33992992 DOI: 10.1016/j.chroma.2021.462151] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 04/07/2021] [Accepted: 04/09/2021] [Indexed: 11/28/2022]
Abstract
Multi-component adsorption of proteins still requires a better understanding of local phenomena to improve the development of predictive models. In this work, all-atom Molecular Dynamics (MD) simulations were used to investigate the influence of protein charge distribution on the adsorption capacity. The simultaneous adsorption of α-chymotrypsin and lysozyme on a cation exchanger, SP Sepharose FF, was studied through MD simulations and compared to macroscopic isotherm experiments. It appears that the charge distribution is a relevant information to better understand specific phenomena, such as a multilayer adsorption caused by the particular electrostatic profile of α-chymotrypsin. Therefore, MD simulations seem to be an interesting way to visualize and highlight these behaviors.
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Affiliation(s)
- Marine Tournois
- TBI, Université de Toulouse, CNRS, INRAE, INSA, Toulouse, France
| | - Stéphane Mathé
- TBI, Université de Toulouse, CNRS, INRAE, INSA, Toulouse, France
| | - Isabelle André
- TBI, Université de Toulouse, CNRS, INRAE, INSA, Toulouse, France
| | - Jérémy Esque
- TBI, Université de Toulouse, CNRS, INRAE, INSA, Toulouse, France
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14
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Shakhvorostov A, Kudaibergenov S. Molecular imprinting of bovine serum albumin and lysozyme within the matrix of polyampholyte hydrogels based on acrylamide, sodium salt of 2-acrylamido-2-methyl-1-propanesulfonic acid and (3-acrylamidopropyl)trimethyl ammonium chloride. CHEMICAL BULLETIN OF KAZAKH NATIONAL UNIVERSITY 2021. [DOI: 10.15328/cb1182] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Molecularly-imprinted polyampholyte (MIP) hydrogels based on nonionic monomer – acrylamide (AAm), anionic monomer – sodium salt of 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS) and cationic monomer – (3-acrylamidopropyl)trimethyl ammonium chloride (APTAC) were obtained by immobilization of bovine serum albumin (BSA) and lysozyme in situ polymerization conditions. It was found that the best amphoteric hydrogel for sorption of BSA is APTAC-75H while for sorption of lysozyme is AMPS-75H. The sorption capacity of APTAC-75H and AMPS-75H with respect to BSA and lysozyme is 305.7 and 64.1-74.8 mg per 1 g of hydrogel respectively. Desorption of BSA and lysozyme from MIP template performed by aqueous solution of 1M NaCl is equal to 82-88%. Separation of BSA and lysozyme from their mixture was performed on MIP templates. The results of adsorption-desorption cycles of BSA on adjusted to BSA polyampholyte hydrogel APTAC-75H and of lysozyme on adjusted to lysozyme polyampholyte hydrogel AMPS-75H show that the mixture of BSA and lysozyme can be selectively separated with the help of MIP hydrogels.
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15
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Zhao C, Si Y, Zhu S, Bradley K, Taha AY, Pan T, Sun G. Diffusion of Protein Molecules through Microporous Nanofibrous Polyacrylonitrile Membranes. ACS APPLIED POLYMER MATERIALS 2021; 3:1618-1627. [PMID: 34541542 PMCID: PMC8445001 DOI: 10.1021/acsapm.0c01394] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Porous nanofibrous membranes have ultrahigh specific surface areas and could be broadly employed in protein purification, enzyme immobilization, and biosensors with enhanced selectivity, sensitivity, and efficiency. However, large biomolecules, such as proteins, have hindered diffusion behavior in the micro-porous media, significantly reducing the benefits provided by the nanofibrous membranes. The study of protein diffusion in polyacrylonitrile (PAN) nanofibrous membranes produced under varied humidity and polymer concentration of electrospinning revealed that heterogeneous structures of the nanofibrous membranes possess much smaller effective pore sizes than the measured pore sizes, which significantly affects the diffusion of large molecules through the system though sizes of proteins and pH conditions also have great impacts. Only when the measured membrane pore size is at least 1000 times higher than the protein size, the diffusion behavior of the protein is predictable in the system. The results provide insights into the design and applications of proper nanofibrous materials for improved applications in protein purification and immobilizations.
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Affiliation(s)
- Cunyi Zhao
- Department of Biological and Agricultural Engineering, University of California, Davis, CA 95616, USA
| | - Yang Si
- Department of Biological and Agricultural Engineering, University of California, Davis, CA 95616, USA
| | - Shenghan Zhu
- Department of Biological and Agricultural Engineering, University of California, Davis, CA 95616, USA
| | - Kevin Bradley
- Department of Biological and Agricultural Engineering, University of California, Davis, CA 95616, USA
| | - Ameer Y Taha
- Department of Food Science and Technology, University of California, Davis, CA 95616, USA
| | - Tingrui Pan
- Department of Biomedical Engineering, University of California, Davis, CA 95616, USA
| | - Gang Sun
- Department of Biological and Agricultural Engineering, University of California, Davis, CA 95616, USA
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16
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Scheiner KC, Maas-Bakker RF, van Steenbergen MJ, Schwendeman SP, Hennink WE, Kok RJ. Post-loading of proangiogenic growth factors in PLGA microspheres. Eur J Pharm Biopharm 2021; 158:1-10. [DOI: 10.1016/j.ejpb.2020.10.022] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 10/07/2020] [Accepted: 10/10/2020] [Indexed: 02/07/2023]
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17
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Mohajeri S, Burke-Kleinman J, Maurice DH, Amsden BG. Formulation parameters governing sustained protein delivery from degradable viscous liquid aliphatic polycarbonates. Int J Pharm 2020; 590:119965. [PMID: 33045320 DOI: 10.1016/j.ijpharm.2020.119965] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 09/28/2020] [Accepted: 10/06/2020] [Indexed: 11/18/2022]
Abstract
Viscous liquid degradable polymers have advantages as drug depots for sustained protein delivery. We have created a new aliphatic polycarbonate for this purpose, poly(trimethylene carbonate-co-5-hydroxy trimethylene carbonate), which upon degradation retains a near neutral micro-environmental pH. As such, this copolymer is highly suited to the delivery of acid sensitive proteins. We show that the mechanism of protein release from this liquid copolymer is consistent with the formation of super-hydrated regions as a result of the osmotic activity of the solution formed upon distributed protein particle dissolution. Protein release can be manipulated by controlling polymer hydrophobicity which can be adjusted by molecular weight and choice of initiator. Moreover, protein release is highly dependent on protein solubility which impacts the osmotic activity of the solution formed upon dissolution of the protein particles while protein molecular size and isoelectric point are not as influential. As demonstrated by the release of highly bioactive vascular endothelial growth factor, formulations of this copolymer are suitable for prolonged delivery of protein therapeutics.
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Affiliation(s)
- Sara Mohajeri
- Department of Chemical Engineering, Queen's University, Kingston, Ontario K7L 3N6, Canada; Human Mobility Research Centre, Kingston General Hospital, Kingston, Ontario K7L 2V7, Canada
| | - Jonah Burke-Kleinman
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston K7L 3N6, Canada
| | - Donald H Maurice
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston K7L 3N6, Canada
| | - Brian G Amsden
- Department of Chemical Engineering, Queen's University, Kingston, Ontario K7L 3N6, Canada; Human Mobility Research Centre, Kingston General Hospital, Kingston, Ontario K7L 2V7, Canada.
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18
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Antosiewicz JM, Długosz M. Constant-pH Brownian Dynamics Simulations of a Protein near a Charged Surface. ACS OMEGA 2020; 5:30282-30298. [PMID: 33251463 PMCID: PMC7689933 DOI: 10.1021/acsomega.0c04817] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Accepted: 11/04/2020] [Indexed: 05/04/2023]
Abstract
We have developed a rigid-body Brownian dynamics algorithm that allows for simulations of a globular protein suspended in an ionic solution confined by a charged planar boundary, with an explicit treatment of pH-dependent protein protonation equilibria and their couplings to the electrostatic potential of the plane. Electrostatic interactions are described within a framework of the continuum Poisson-Boltzmann model, whereas protein-plane hydrodynamic interactions are evaluated based on analytical expressions for the position- and orientation-dependent near-wall friction tensor of a spheroid. The algorithm was applied to simulate near-surface diffusion of lysozyme in solutions having pH in the range 4-10 and ionic strengths of 10 and 150 mM. As a reference, we performed Brownian dynamics simulations in which the protein is assigned a fixed, most probable protonation state, appropriate for given solution conditions and unaffected by the presence of the charged plane, and Brownian dynamics simulations in which the protein probes possible protonation states with the pH-dependent probability, but these variations are not coupled to the electric field generated by the boundary. We show that electrostatic interactions with the negatively charged plane substantially modify probabilities of different protonation states of lysozyme and shift protonation equilibria of both acidic and basic amino acid side chains toward higher pH values. Consequently, equilibrium energy distributions, equilibrium position-orientation distributions, and functions that characterize rotational dynamics, which for a protein with multiple ionization sites, such as lysozyme, in the presence of a charged obstacle are pH-dependent, are significantly affected by the approach taken to incorporate the solution pH into simulations.
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19
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Bacon K, Blain A, Burroughs M, McArthur N, Rao BM, Menegatti S. Isolation of Chemically Cyclized Peptide Binders Using Yeast Surface Display. ACS COMBINATORIAL SCIENCE 2020; 22:519-532. [PMID: 32786323 DOI: 10.1021/acscombsci.0c00076] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Cyclic peptides with engineered protein-binding activity have gained increasing attention for use in therapeutic and biotechnology applications. We describe the efficient isolation and characterization of cyclic peptide binders from genetically encoded combinatorial libraries using yeast surface display. Here, peptide cyclization is achieved by disuccinimidyl glutarate-mediated cross-linking of amine groups within a linear peptide sequence that is expressed as a yeast cell surface fusion. Using this approach, we first screened a library of cyclic heptapeptides using magnetic selection, followed by fluorescence activated cell sorting (FACS) to isolate binders for a model target (lysozyme) with low micromolar binding affinity (KD ∼ 1.2-3.7 μM). The isolated peptides bind lysozyme selectively and only when cyclized. Importantly, we showed that yeast surface displayed cyclic peptides can be used to efficiently obtain quantitative estimates of binding affinity, circumventing the need for chemical synthesis of the selected peptides. Subsequently, to demonstrate broader applicability of our approach, we isolated cyclic heptapeptides that bind human interleukin-17 (IL-17) using yeast-displayed IL-17 as a target for magnetic selection, followed by FACS using recombinant IL-17. Molecular docking simulations and follow-up experimental analyses identified a candidate cyclic peptide that likely binds IL-17 in its receptor binding region with moderate apparent affinity (KD ∼ 300 nM). Taken together, our results show that yeast surface display can be used to efficiently isolate and characterize cyclic peptides generated by chemical modification from combinatorial libraries.
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Affiliation(s)
- Kaitlyn Bacon
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Box 7905, Engineering Building I, Raleigh, North Carolina 27695, United States
| | - Abigail Blain
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Box 7905, Engineering Building I, Raleigh, North Carolina 27695, United States
| | - Matthew Burroughs
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Box 7905, Engineering Building I, Raleigh, North Carolina 27695, United States
| | - Nikki McArthur
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Box 7905, Engineering Building I, Raleigh, North Carolina 27695, United States
| | - Balaji M Rao
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Box 7905, Engineering Building I, Raleigh, North Carolina 27695, United States
- Biomanufacturing Training and Education Center (BTEC), North Carolina State University, Raleigh, North Carolina 27695, United States
| | - Stefano Menegatti
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Box 7905, Engineering Building I, Raleigh, North Carolina 27695, United States
- Biomanufacturing Training and Education Center (BTEC), North Carolina State University, Raleigh, North Carolina 27695, United States
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20
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Nie J, Chen Z. Protein-Based Nano-Vessels Facilitates the Victoria Blue B Mediated Inhibition of Amyloid Fibrillation. Macromol Rapid Commun 2020; 41:e2000368. [PMID: 33015910 DOI: 10.1002/marc.202000368] [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: 07/09/2020] [Revised: 09/04/2020] [Indexed: 11/08/2022]
Abstract
Amyloid fibrils are associated with a number of serious and incurable diseases. The understanding of the pathogenic formation of amyloid proteins is progressing. Nonetheless, no treatment is available to deal with amyloid diseases. It is reported here that victoria blue B (VBB) contains an intrinsic marginal inhibitory activity toward protein fibrillation. Moreover, when VBB is co-assembled with scaffold proteins to form fluorescent protein nano-vessels (VBB-FPNs), these complexes show much improved fibrillation inhibitory effects. VBB-FPNs can effectively inhibit lysozyme fibrils formation likely through delaying the nucleation and elongation in a concentration-dependent manner as shown by fluorescent assay, circular dichroism, transmission electron microscopy, and atomic force microscopy. This work describes a new inhibitor of protein fibrillation and provides a new means to enhance the inhibition efficiency of given inhibitors, thus affording a fresh angle to modulate protein fibrillation.
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Affiliation(s)
- Junlian Nie
- J. Nie, Prof. Z. Chen, Institute of Theoretical Chemistry and College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun, 130012, P. R. China
| | - Zhijun Chen
- J. Nie, Prof. Z. Chen, Institute of Theoretical Chemistry and College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun, 130012, P. R. China
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21
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Jackson S, Frey BS, Bates MN, Swiner DJ, Badu-Tawiah AK. Direct differentiation of whole blood for forensic serology analysis by thread spray mass spectrometry. Analyst 2020; 145:5615-5623. [PMID: 32633747 PMCID: PMC7896278 DOI: 10.1039/d0an00857e] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Direct analysis of whole blood on bloodstained textiles is achieved with thread spray mass spectrometry (MS). This capability satisfies investigators' first priority in crime scene investigations, which is determining if a stain is blood. This thread spray method explores the use of evidentiary fabric threads for rapid determination of hemoglobin directly from whole blood within textiles without prior extraction steps. The multiplicity of information that can be derived from the thread spray MS method distinguishes it from the current presumptive Bluestar® method, by enabling the detection of hemoglobin (both α- and β-chains), the heme co-factor and lipids all from a single blood sample. Lipid composition was found to differ for blood samples originating from human, canine, and horse species. The robustness of the thread spray MS method as a forensic analytical platform was evaluated in three ways: (1) its successful applicability to samples previously tested by the Bluestar® presumptive method, offering a confirmatory test without prior sample pre-treatment, (2) successful detection of heme from previously washed fabrics, which demonstrated the unprecedented sensitivity of the thread spray method, and (3) the ability to analyze samples stored under ambient conditions for up to 30 days. These results attest to the potential capabilities of the thread spray MS platform in forensic serology, and its application for direct analysis of evidentiary garments, which confer the advantages of rapid analysis and the reduction of the false positive and negative identification rates for blood on textiles.
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Affiliation(s)
- Sierra Jackson
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, OH 43210, USA.
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22
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Komorek P, Wałek M, Jachimska B. Mechanism of lysozyme adsorption onto gold surface determined by quartz crystal microbalance and surface plasmon resonance. Bioelectrochemistry 2020; 135:107582. [PMID: 32535493 DOI: 10.1016/j.bioelechem.2020.107582] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 06/02/2020] [Accepted: 06/02/2020] [Indexed: 01/23/2023]
Abstract
In this study, the physicochemical characterization of lysozyme adsorbed on gold was investigated. Through the use of MP-SPR it was possible to establish that the orientation of molecules changes from side-on to between or end-on with increasing surface coverage. The data confirms that the process of adsorption is driven primarily by electrostatic interactions but also by hydrophobic forces. MP-SPR data was compared with the Random Sequential Adsorption model for a molecule with an ellipsoidal shape. Contact angle measurements showed that higher surface coverage also translates in more hydrophilic properties of obtained lysozyme layer. Comparison of CD and PM-IRRAS spectra in solution and adsorbed state respectively showed changes in the secondary structures of lysozyme. These changes are dependent on pH, but fundamentally they go in the direction of the increase of β-turn/random content with a simultaneous decrease in β-sheet fraction, which suggests that aggregation is not occurring. The combination of MP-SPR and QCM-D measurements allowed the estimation of the number of water molecules associated with the lysozymes films. It has been observed that hydration decreases from 70% in pH = 4 to 30% in pH = 11. This data indicates that hydration is driven mainly by the degree of protonation of lysozyme molecules.
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Affiliation(s)
- P Komorek
- Jerzy Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences, Niezapominajek 8, 30-239 Cracow, Poland
| | - M Wałek
- Jerzy Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences, Niezapominajek 8, 30-239 Cracow, Poland
| | - B Jachimska
- Jerzy Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences, Niezapominajek 8, 30-239 Cracow, Poland.
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23
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Investigation of the reversibility of freeze/thaw stress-induced protein instability using heat cycling as a function of different cryoprotectants. Bioprocess Biosyst Eng 2020; 43:1309-1327. [PMID: 32198550 PMCID: PMC7261286 DOI: 10.1007/s00449-020-02327-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2019] [Accepted: 03/06/2020] [Indexed: 02/07/2023]
Abstract
Formulation conditions have a significant influence on the degree of freeze/thaw (FT) stress-induced protein instabilities. Adding cryoprotectants might stabilize the induced FT stress instabilities. However, a simple preservation of protein stability might be insufficient and further methods are necessary. This study aims to evaluate the addition of a heat cycle following FT application as a function of different cryoprotectants with lysozyme as exemplary protein. Sucrose and glycerol were shown to be the most effective cryoprotectants when compared to PEG200 and Tween20. In terms of heat-induced reversibility of aggregates, glycerol showed the best performance followed by sucrose, NaCl and Tween20 systems. The analysis was performed using a novel approach to visualize complex interplays by a clustering and data reduction scheme. In addition, solubility and structural integrity were measured and confirmed the obtained results.
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24
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Zeller WE, Reinhardt LA, Robe JT, Sullivan ML, Panke-Buisse K. Comparison of Protein Precipitation Ability of Structurally Diverse Procyanidin-Rich Condensed Tannins in Two Buffer Systems. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:2016-2023. [PMID: 31986021 DOI: 10.1021/acs.jafc.9b06173] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The protein precipitation (PP) of bovine serum albumin (BSA), lysozyme (LYS), and alfalfa leaf protein (ALF) by four procyanidin-rich condensed tannin (CT) samples in both 2-[N-morpholino]ethanesulfonic acid (MES) and a modified Goering-Van Soest (GVS) buffer is described. Purified CT samples examined included Vitis vinifera seed (mean degree of polymerization [mDP] 4.1, 16.5% galloylated), Tilia sp. flowers (B-type linkages, mDP 5.9), Vaccinium macrocarpon berries (mDP 8.7, 31.7% A-type linkages). and Trifolium pratense flowers (B-type linkages, mDP 12.3) and were characterized by 2D NMR (>90% purity). In general, CTs precipitated ALF > LYS ≥ BSA. PP in GVS buffer was 1 to 2.25 times greater than that in MES buffer (25 °C). The GVS buffer system better reflects the results/conclusions from the literature on the impacts mDP, galloylation, and A-type linkages have on PP. Determinations of PP using the MES buffer at 37 °C indicated that some of these differences may be attributed to the temperature at which GVS buffer determinations are conducted. In vitro PP studies using the GVS buffer may offer better guidance when selecting CT-containing forages and amendments for ruminant feeding studies.
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Affiliation(s)
- Wayne E Zeller
- US Dairy Forage Research Center , ARS-USDA , 1925 Linden Drive , Madison , Wisconsin 53706 , United States
| | - Laurie A Reinhardt
- US Dairy Forage Research Center , ARS-USDA , 1925 Linden Drive , Madison , Wisconsin 53706 , United States
| | - Jamison T Robe
- US Dairy Forage Research Center , ARS-USDA , 1925 Linden Drive , Madison , Wisconsin 53706 , United States
| | - Michael L Sullivan
- US Dairy Forage Research Center , ARS-USDA , 1925 Linden Drive , Madison , Wisconsin 53706 , United States
| | - Kevin Panke-Buisse
- US Dairy Forage Research Center , ARS-USDA , 1925 Linden Drive , Madison , Wisconsin 53706 , United States
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25
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Nishiguchi A, Taguchi T. A Thixotropic, Cell-Infiltrative Nanocellulose Hydrogel That Promotes in Vivo Tissue Remodeling. ACS Biomater Sci Eng 2020; 6:946-958. [PMID: 33464861 DOI: 10.1021/acsbiomaterials.9b01549] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Injectable gels have been used in minimally invasive surgery for tissue regeneration and treatment of inflammatory diseases. However, polymeric hydrogels often fail in cell infiltration, because of the presence of dense, cross-linked molecular networks and a lack of bioactivity, which causes delayed tissue remodeling. Here, we report a thixotropic, cell-infiltrative hydrogel of biofunctionalized nanocellulose that topologically enhances cell infiltration and biochemically upregulates cellular activity for the promotion of tissue remodeling. Biodegradable, sulfonated nanocellulose forms a nanofibrous hydrogel, mimicking cellular microenvironments through cross-linking between nanocellulose and gelatin. Resulting nanocellulose hydrogels showed thixotropy, allowing for single syringe injection. Nanofiber-based hydrogels possess high molecular permeability, which is due to nanoporous structures. Sulfonate groups on nanocellulose increase protein adsorption and induce cellular extension in vitro. Highly sulfonated nanocellulose hydrogels enhanced cell infiltration and vascularization upon implantation into rats. Macrophage polarization to M2 was observed in nanocellulose hydrogels, which may be involved in tissue remodeling. Injectable, biofunctionalized nanocellulose gels have enormous potential as artificial biomatrices to heal inflammatory diseases through manipulation of the immune system and promotion of tissue remodeling.
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Affiliation(s)
- Akihiro Nishiguchi
- Biomaterials Field, Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Tetsushi Taguchi
- Biomaterials Field, Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
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26
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Wholey WY, Mueller JL, Tan C, Brooks JF, Zikherman J, Cheng W. Synthetic Liposomal Mimics of Biological Viruses for the Study of Immune Responses to Infection and Vaccination. Bioconjug Chem 2020; 31:685-697. [PMID: 31940172 DOI: 10.1021/acs.bioconjchem.9b00825] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Human viruses possess very complex supramolecular structures. Both icosahedral and enveloped viruses typically display an array of viral-encoded protein antigens at varied spatial densities on the viral particle surface. The viral nucleic acid genome, on the other hand, is encapsulated inside the viral particle. Although both the surface antigen and the interior nucleic acids could independently produce immunological responses, how B cells integrate these two types of signals and respond to a typical virus particle to initiate activation is not well understood at a molecular level. The study of these fundamental biological processes would benefit from the development of viral structural mimics that are well constructed to incorporate both quantitative and qualitative viral features for presentation to B cells. These novel tools would enable researchers to systematically dissect the underlying processes. Here we report the development of such particulate antigens based on liposomes engineered to display a model protein antigen, hen egg lysozyme (HEL). We developed methods to overexpress and purify various affinity mutants of HEL from E. coli. We conjugated the purified recombinant HEL proteins onto the surface of a virion-sized liposome in an orientation-specific manner at defined spatial densities and also encapsulated nucleic acid molecules into the interior of the liposome. Both the chemical conjugation of the HEL antigen on liposome surfaces and the encapsulation of nucleic acids were stable under physiologically relevant conditions. These liposomes elicited antigen-specific B-cell responses in vitro, which validate these supramolecular structures as a novel and effective approach to mimic and systematically isolate the role of essential viral features in directing the B-cell response to particulate antigens.
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Affiliation(s)
- Wei-Yun Wholey
- Department of Pharmaceutical Sciences, University of Michigan, 428 Church Street, Ann Arbor, Michigan 48109, United States
| | - James L Mueller
- Division of Rheumatology, Rosalind Russell and Ephraim P. Engleman Arthritis Research Center, Department of Medicine, University of California, San Francisco, California 94143, United States
| | - Corey Tan
- Division of Rheumatology, Rosalind Russell and Ephraim P. Engleman Arthritis Research Center, Department of Medicine, University of California, San Francisco, California 94143, United States
| | - Jeremy F Brooks
- Division of Rheumatology, Rosalind Russell and Ephraim P. Engleman Arthritis Research Center, Department of Medicine, University of California, San Francisco, California 94143, United States
| | - Julie Zikherman
- Division of Rheumatology, Rosalind Russell and Ephraim P. Engleman Arthritis Research Center, Department of Medicine, University of California, San Francisco, California 94143, United States
| | - Wei Cheng
- Department of Pharmaceutical Sciences, University of Michigan, 428 Church Street, Ann Arbor, Michigan 48109, United States.,Department of Biological Chemistry, University of Michigan Medical School, 1150 West Medical Center Drive, Ann Arbor, Michigan 48109, United States
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27
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Polyelectrolyte nanoparticles based on functionalized silica and pillar[5]arene derivatives for recognition of model proteins. Russ Chem Bull 2019. [DOI: 10.1007/s11172-019-2667-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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28
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Apparent protein cloud point temperature determination using a low volume high-throughput cryogenic device in combination with automated imaging. Bioprocess Biosyst Eng 2019; 43:439-456. [PMID: 31754791 DOI: 10.1007/s00449-019-02239-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Accepted: 10/21/2019] [Indexed: 12/17/2022]
Abstract
Short-term parameters correlating to long-term protein stability, such as the protein cloud point temperature (Tcloud), are of interest to improve efficiency during protein product development. Such efficiency is reached if short-term parameters are obtained in a low volume and high-throughput (HT) manner. This study presents a low volume HT detection method for (sub-zero) Tcloud determination of lysozyme, as such an experimental method is not available yet. The setup consists of a cryogenic device with an automated imaging system. Measurement reproducibility (median absolute deviation of 0.2 °C) and literature-based parameter validation (Pearson correlation coefficient of 0.996) were shown by a robustness and validation study. The subsequent case study demonstrated a partial correlation between the obtained apparent Tcloud parameter and long-term protein stability as a function of lysozyme concentration, ion type, ionic strength, and freeze/thaw stress. The presented experimental setup demonstrates its ability to advance short-term strategies for efficient protein formulation development.
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29
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Eggenberger OM, Ying C, Mayer M. Surface coatings for solid-state nanopores. NANOSCALE 2019; 11:19636-19657. [PMID: 31603455 DOI: 10.1039/c9nr05367k] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Since their introduction in 2001, solid-state nanopores have been increasingly exploited for the detection and characterization of biomolecules ranging from single DNA strands to protein complexes. A major factor that enables the application of nanopores to the analysis and characterization of a broad range of macromolecules is the preparation of coatings on the pore wall to either prevent non-specific adhesion of molecules or to facilitate specific interactions of molecules of interest within the pore. Surface coatings can therefore be useful to minimize clogging of nanopores or to increase the residence time of target analytes in the pore. This review article describes various coatings and their utility for changing pore diameters, increasing the stability of nanopores, reducing non-specific interactions, manipulating surface charges, enabling interactions with specific target molecules, and reducing the noise of current recordings through nanopores. We compare the coating methods with respect to the ease of preparing the coating, the stability of the coating and the requirement for specialized equipment to prepare the coating.
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Affiliation(s)
- Olivia M Eggenberger
- Adolphe Merkle Institute, Chemin des Verdiers 4, University of Fribourg, Fribourg, Switzerland.
| | - Cuifeng Ying
- Adolphe Merkle Institute, Chemin des Verdiers 4, University of Fribourg, Fribourg, Switzerland.
| | - Michael Mayer
- Adolphe Merkle Institute, Chemin des Verdiers 4, University of Fribourg, Fribourg, Switzerland.
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Zhang C, Parada GA, Zhao X, Chen Z. Probing Surface Hydration and Molecular Structure of Zwitterionic and Polyacrylamide Hydrogels. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:13292-13300. [PMID: 31553882 DOI: 10.1021/acs.langmuir.9b02544] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
A hydrogel is a hydrophilic cross-linked polymer network which can contain a large amount of water. Hydrogels with distinguished interfacial physical toughness were analyzed for their potential application as antifouling coating materials, utilizing sum frequency generation (SFG) spectroscopy as the interfacial analytical technique. The surface structures of one sulfobetaine (SBMA) zwitterionic hydrogel (ZWHG) and two polysaccharide hydrogels (PHGs) were probed in air; their interfacial structures with silica were examined using SFG in water and protein solutions, respectively. Both ZWHG and PHGs interfaces in water were dominated by strongly hydrogen-bonded water molecules, but the bonding strength associated with ZWHG was much stronger. Although all hydrogels experienced interfacial change in the presence of protein solutions, after cleaning, the zwitterionic hydrogel interface recovered almost completely while the other two hydrogels were subject to irreversible protein adsorption. Additionally, orientational analysis of ZWHG methyl groups in water was conducted and related to the superior hydrogen-bonding strength of water molecules at the ZWHG interface. The interfacial structures of hydrogel materials probed by SFG can be correlated to their antifouling properties. This research highlighted the critical role that hydrogen-bonding strength of interfacial water molecules play for antifouling applications.
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Affiliation(s)
- Chengcheng Zhang
- Department of Chemistry , University of Michigan , 930 North University Avenue , Ann Arbor , Michigan 48109 , United States
| | - German Alberto Parada
- Department of Chemical Engineering , Massachusetts Institute of Technology , 77 Massachusetts Avenue , Cambridge , Massachusetts 02139 , United States
| | - Xuanhe Zhao
- Department of Mechanic Engineering , Massachusetts Institute of Technology , 77 Massachusetts Avenue , Cambridge , Massachusetts 02139 , United States
| | - Zhan Chen
- Department of Chemistry , University of Michigan , 930 North University Avenue , Ann Arbor , Michigan 48109 , United States
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31
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Adsorption layer structure at soil mineral/biopolymer/supporting electrolyte interface – The impact on solid aggregation. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.03.172] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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32
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Different conformational states of hen egg white lysozyme formed by exposure to the surfactant of sodium dodecyl benzenesulfonate. Int J Biol Macromol 2019; 128:54-60. [DOI: 10.1016/j.ijbiomac.2019.01.097] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Revised: 01/03/2019] [Accepted: 01/19/2019] [Indexed: 12/17/2022]
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33
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Tanaka T, Takai Y, Nagase A, Teraguchi K, Minbu H, Ochiai A, Kimura I, Taniguchi M. Protein adsorption characteristics of nanoparticle-assembled hollow microspheres of hydroxyapatite and their composites with PLLA microporous membranes. Heliyon 2019; 5:e01490. [PMID: 31011647 PMCID: PMC6462782 DOI: 10.1016/j.heliyon.2019.e01490] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Revised: 03/11/2019] [Accepted: 04/04/2019] [Indexed: 01/18/2023] Open
Abstract
Nanoparticle-assembled hydroxyapatite (HA) hollow microspheres have a high surface area and are convenient to handle, owing to their characteristic structure. In this study we characterized the protein adsorption of HA hollow microspheres prepared from CaCl2 and K2HPO4 by a water-in-oil-in-water (W/O/W) emulsion method assisted by two surfactants: Span 80 and Tween 20. The HA hollow microspheres adsorbed bovine serum albumin, bovine γ-globulin, equine skeletal muscle myoglobin, and chicken egg white lysozyme in 10 mM sodium phosphate buffer (pH 6.8) in a Langmuir-type adsorption and desorbed the proteins in 800 mM sodium phosphate buffer (pH 6.8). The maximum adsorbed amounts of the HA hollow microspheres were 7.5–9.0 times higher than those of the microrods with a similar size range. The composite membranes of the HA microspheres and the poly(l-lactic acid) (PLLA) microporous membranes exhibited a high adsorption capacity for γ-globulin.
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Affiliation(s)
- Takaaki Tanaka
- Department of Materials Science and Technology, Niigata University, Niigata 950-2181, Japan
| | - Yoshihiko Takai
- Department of Materials Science and Technology, Niigata University, Niigata 950-2181, Japan
| | - Akifumi Nagase
- Department of Materials Science and Technology, Niigata University, Niigata 950-2181, Japan
| | - Kazuki Teraguchi
- Department of Materials Science and Technology, Niigata University, Niigata 950-2181, Japan
| | - Hiromi Minbu
- Department of Materials Science and Technology, Niigata University, Niigata 950-2181, Japan
| | - Akihito Ochiai
- Department of Materials Science and Technology, Niigata University, Niigata 950-2181, Japan
| | - Isao Kimura
- Department of Chemistry and Chemical Engineering, Niigata University, Niigata 950-2181, Japan
| | - Masayuki Taniguchi
- Department of Materials Science and Technology, Niigata University, Niigata 950-2181, Japan
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Liu L, Zheng M, Li Z, Li Q, Mao C. Patterning Nanoparticles with DNA Molds. ACS APPLIED MATERIALS & INTERFACES 2019; 11:13853-13858. [PMID: 30793605 DOI: 10.1021/acsami.8b22691] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
We report a nanopatterning strategy in which self-assembled DNA nanostructures serve as structural templates. In previous work, ordering of NPs primarily relied on specific recognition, e.g., DNA-DNA hybridization. Only a few cases have been reported on nonspecific adsorption. Unfortunately, these studies were limited by the integrity and homogeneity of templates and the variety of patterned nanoparticles (NPs). Herein, we have developed a general method to pattern various NPs. The NPs adsorb onto substrate via NP-substrate direct interactions and the substrates are patterned into large arrays (>4 × 4 μm) of tiny, accessible cavities by self-assembled DNA arrays. As a demonstration, DNA templates include tetragonal and hexagonal arrays and the NPs include individual DNA nanomotifs, gold nanoparticles (AuNPs), and proteins. All nanostructures have been confirmed by atomic force microscopy and corresponding fast Fourier transform (FFT) analysis.
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Affiliation(s)
- Longfei Liu
- Department of Chemistry , Purdue University , West Lafayette , Indiana 47907 , United States
| | - Mengxi Zheng
- Department of Chemistry , Purdue University , West Lafayette , Indiana 47907 , United States
| | - Zhe Li
- Department of Chemistry , Purdue University , West Lafayette , Indiana 47907 , United States
| | - Qian Li
- Department of Chemistry , Purdue University , West Lafayette , Indiana 47907 , United States
| | - Chengde Mao
- Department of Chemistry , Purdue University , West Lafayette , Indiana 47907 , United States
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Brudar S, Hribar-Lee B. The Role of Buffers in Wild-Type HEWL Amyloid Fibril Formation Mechanism. Biomolecules 2019; 9:E65. [PMID: 30769878 PMCID: PMC6406783 DOI: 10.3390/biom9020065] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 02/04/2019] [Accepted: 02/05/2019] [Indexed: 01/06/2023] Open
Abstract
Amyloid fibrils, highly ordered protein aggregates, play an important role in the onset of several neurological disorders. Many studies have assessed amyloid fibril formation under specific solution conditions, but they all lack an important phenomena in biological solutions-buffer specific effects. We have focused on the formation of hen egg-white lysozyme (HEWL) fibrils in aqueous solutions of different buffers in both acidic and basic pH range. By means of UV-Vis spectroscopy, fluorescence measurements and CD spectroscopy, we have managed to show that fibrillization of HEWL is affected by buffer identity (glycine, TRIS, phosphate, KCl-HCl, cacodylate, HEPES, acetate), solution pH, sample incubation (agitated vs. static) and added excipients (NaCl and PEG). HEWL only forms amyloid fibrils at pH = 2.0 under agitated conditions in glycine and KCl-HCl buffers of high enough ionic strength. Phosphate buffer on the other hand stabilizes the HEWL molecules. Similar stabilization effect was achieved by addition of PEG12000 molecules to the solution.
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Affiliation(s)
- Sandi Brudar
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 113, SI-1000 Ljubljana, Slovenia.
| | - Barbara Hribar-Lee
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 113, SI-1000 Ljubljana, Slovenia.
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Klijn ME, Hubbuch J. Correlating multidimensional short-term empirical protein properties to long-term protein physical stability data via empirical phase diagrams. Int J Pharm 2019; 560:166-174. [PMID: 30769132 DOI: 10.1016/j.ijpharm.2019.02.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Revised: 01/31/2019] [Accepted: 02/01/2019] [Indexed: 12/21/2022]
Abstract
Identification of long-term stable biopharmaceutical formulations is essential for biopharmaceutical product development. Reduction of the number of long-term storage experiments and a well-defined formulation search space requires knowledge-based formulation screenings and a detailed protein phase behavior understanding. To achieve this, short-term analytical techniques can serve as predictors for long-term protein phase behavior. Protein phase behavior studies that investigate this concept commonly display shortcomings such as limited and small datasets, sample adjustments, or simplistic data analysis. To overcome these shortcomings, 150 unique lysozyme solutions were analyzed using six different short-term analytical techniques. Lysozyme's structural properties, conformational stability, colloidal stability, surface charge, and surface hydrophobicity were obtained directly after formulation preparation. Employing the empirical phase diagram method, this short-term data was correlated to long-term physical stability data obtained during 40 days of storage. Short-term protein properties showed partial correlation to long-term phase behavior. Structural differences, changing surface properties, colloidal stability, and conformation stability as a function of formulation conditions were observed. This study contributes to long-term protein phase behavior research by presenting a systematic, data-dependent, and multidimensional data evaluation workflow to create a comprehensive overview of short-term protein analytics in relation to long-term protein phase behavior.
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Affiliation(s)
- Marieke E Klijn
- Institute of Engineering in Life Sciences, Section IV: Biomolecular Separation Engineering, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 2, 76131 Karlsruhe, Germany
| | - Jürgen Hubbuch
- Institute of Engineering in Life Sciences, Section IV: Biomolecular Separation Engineering, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 2, 76131 Karlsruhe, Germany.
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Levashov PA, Matolygina DA, Ovchinnikova ED, Adamova IY, Dmitrieva OA, Nuzhdina AV, Pokrovsky NS, Eremeev NL. New Sorbent on the Basis of Covalently Immobilized Lysozyme for Removal of Bacterial Lipopolysaccharide (Endotoxin) from Biological Fluids. BIOCHEMISTRY (MOSCOW) 2019; 84:33-39. [DOI: 10.1134/s0006297919010048] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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38
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Szewczuk-Karpisz K, Wiśniewska M. Lysozyme as a flocculant-inducing agent improving the silica removal from aqueous solutions - A turbidimetric study. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2018; 226:187-193. [PMID: 30119043 DOI: 10.1016/j.jenvman.2018.08.026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Revised: 08/01/2018] [Accepted: 08/06/2018] [Indexed: 06/08/2023]
Abstract
In this paper, the lysozyme (LSZ) adsorption impact on the silica suspension stability was established. In other words, the stabilization/destabilization mechanism of the SiO2/LSZ system was explained based on the adsorption, electrokinetic and stability measurement results. Lysozyme adsorbs on the silica surface in the whole pH range. This process contributes to the changes in silica surface charge and zeta potential values. The lysozyme addition influences the system stability too. At pH 7.6 and 9, a large decrease in the silica suspension stability was found. It is connected with the neutralization of solid negative charge by the positively charged macromolecules. As a result, large aggregates can be formed, which is highly desirable in the silica removal procedure.
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Affiliation(s)
| | - Małgorzata Wiśniewska
- Department of Radiochemistry and Colloid Chemistry, Faculty of Chemistry, Maria Curie-Sklodowska University, M. Curie-Sklodowska Sq. 3, 20-031 Lublin, Poland
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39
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Interaction of surfactant and protein at the O/W interface and its effect on colloidal and biological properties of polymeric nanocarriers. Colloids Surf B Biointerfaces 2018; 173:295-302. [PMID: 30308454 DOI: 10.1016/j.colsurfb.2018.09.072] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Revised: 09/20/2018] [Accepted: 09/28/2018] [Indexed: 12/20/2022]
Abstract
HYPOTHESIS The use of polymer-based surfactants in the double-emulsion (water/oil/water, W/O/W) solvent-evaporation technique is becoming a widespread strategy for preparing biocompatible and biodegradable polymeric nanoparticles (NPs) loaded with biomolecules of interest in biomedicine, or biotechnology. This approach enhances the stability of the NPs, reduces their size and recognition by the mononuclear phagocytic system, and protects the encapsulated biomolecule against losing biological activity. Different protocols to add the surfactant during the synthesis lead to different NP colloidal properties and biological activity. EXPERIMENTS We develop an in vitro model to mimic the first step of the W/O/W NP synthesis method, which enables us to analyze the surfactant-biomolecule interaction at the O/W interface. We compare the interfacial properties when the surfactant is added from the aqueous or the organic phase, and the effect of pH of the biomolecule solution. We work with a widely used biocompatible surfactant (Pluronic F68), and lysozyme, reported as a protein model. FINDINGS The surfactant, when added from the water phase, displaces the protein from the interface, hence protecting the biomolecule. This could explain the improved colloidal stability of NPs, and the higher biological activity of the lysozyme released from nanoparticles found with the counterpart preparation.
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40
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Vander Straeten A, Bratek-Skicki A, Jonas AM, Fustin CA, Dupont-Gillain C. Integrating Proteins in Layer-by-Layer Assemblies Independently of their Electrical Charge. ACS NANO 2018; 12:8372-8381. [PMID: 29965727 DOI: 10.1021/acsnano.8b03710] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Layer-by-layer (LbL) assembly is an attractive method for protein immobilization at interfaces, a much wanted step for biotechnologies and biomedicine. Integrating proteins in LbL thin films is however very challenging due to their low conformational entropy, heterogeneous spatial distribution of charges, and polyampholyte nature. Protein-polyelectrolyte complexes (PPCs) are promising building blocks for LbL construction owing to their standardized charge and polyelectrolyte (PE) corona. In this work, lysozyme was complexed with poly(styrenesulfonate) (PSS) at different ionic strengths and pH values. The PPCs size and electrical properties were investigated, and the forces driving complexation were elucidated, in the light of computations of polyelectrolyte conformation, with a view to further unravel LbL construction mechanisms. Quartz crystal microbalance and atomic force microscopy were used to monitor the integration of PPCs compared to the one of bare protein molecules in LbL assemblies, and colorimetric assays were performed to determine the protein amount in the thin films. Layers built with PPCs show higher protein contents and hydration levels. Very importantly, the results also show that LbL construction with PPCs mainly relies on standard PE-PE interactions, independent of the charge state of the protein, in contrast to classical bare protein assembly with PEs. This considerably simplifies the incorporation of proteins in multilayers, which will be beneficial for biosensing, heterogeneous biocatalysis, biotechnologies, and medical applications that require active proteins at interfaces.
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Affiliation(s)
- Aurélien Vander Straeten
- Institute of Condensed Matter and Nanosciences , Université catholique de Louvain , Place Louis Pasteur, 1 bte L4.01.10 , B-1348 Louvain-la-Neuve , Belgium
| | - Anna Bratek-Skicki
- Institute of Condensed Matter and Nanosciences , Université catholique de Louvain , Place Louis Pasteur, 1 bte L4.01.10 , B-1348 Louvain-la-Neuve , Belgium
| | - Alain M Jonas
- Institute of Condensed Matter and Nanosciences , Université catholique de Louvain , Place Louis Pasteur, 1 bte L4.01.10 , B-1348 Louvain-la-Neuve , Belgium
| | - Charles-André Fustin
- Institute of Condensed Matter and Nanosciences , Université catholique de Louvain , Place Louis Pasteur, 1 bte L4.01.10 , B-1348 Louvain-la-Neuve , Belgium
| | - Christine Dupont-Gillain
- Institute of Condensed Matter and Nanosciences , Université catholique de Louvain , Place Louis Pasteur, 1 bte L4.01.10 , B-1348 Louvain-la-Neuve , Belgium
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41
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Patel P, Parmar K, Patel D, Kumar S, Trivedi M, Das M. Inhibition of amyloid fibril formation of lysozyme by ascorbic acid and a probable mechanism of action. Int J Biol Macromol 2018; 114:666-678. [DOI: 10.1016/j.ijbiomac.2018.03.152] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2018] [Revised: 03/23/2018] [Accepted: 03/25/2018] [Indexed: 12/20/2022]
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42
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Wijaya EC, Separovic F, Drummond CJ, Greaves TL. Stability and activity of lysozyme in stoichiometric and non-stoichiometric protic ionic liquid (PIL)-water systems. J Chem Phys 2018; 148:193838. [DOI: 10.1063/1.5010055] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Emmy C. Wijaya
- School of Chemistry, Bio21 Institute, The University of Melbourne, Melbourne, VIC 3010, Australia
- CSIRO Manufacturing, Clayton, VIC 3169, Australia
| | - Frances Separovic
- School of Chemistry, Bio21 Institute, The University of Melbourne, Melbourne, VIC 3010, Australia
| | - Calum J. Drummond
- School of Science, College of Science, Engineering and Health, RMIT University, VIC 3001, Australia
| | - Tamar L. Greaves
- School of Science, College of Science, Engineering and Health, RMIT University, VIC 3001, Australia
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43
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Klijn ME, Hubbuch J. Application of Empirical Phase Diagrams for Multidimensional Data Visualization of High-Throughput Microbatch Crystallization Experiments. J Pharm Sci 2018; 107:2063-2069. [PMID: 29709489 DOI: 10.1016/j.xphs.2018.04.018] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Accepted: 04/20/2018] [Indexed: 01/18/2023]
Abstract
Protein phase diagrams are a tool to investigate the cause and consequence of solution conditions on protein phase behavior. The effects are scored according to aggregation morphologies such as crystals or amorphous precipitates. Solution conditions affect morphologic features, such as crystal size, as well as kinetic features, such as crystal growth time. Commonly used data visualization techniques include individual line graphs or phase diagrams based on symbols. These techniques have limitations in terms of handling large data sets, comprehensiveness or completeness. To eliminate these limitations, morphologic and kinetic features obtained from crystallization images generated with high throughput microbatch experiments have been visualized with radar charts in combination with the empirical phase diagram method. Morphologic features (crystal size, shape, and number, as well as precipitate size) and kinetic features (crystal and precipitate onset and growth time) are extracted for 768 solutions with varying chicken egg white lysozyme concentration, salt type, ionic strength, and pH. Image-based aggregation morphology and kinetic features were compiled into a single and easily interpretable figure, thereby showing that the empirical phase diagram method can support high-throughput crystallization experiments in its data amount as well as its data complexity.
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Affiliation(s)
- Marieke E Klijn
- Institute of Engineering in Life Sciences, Section IV: Biomolecular Separation Engineering, Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany
| | - Jürgen Hubbuch
- Institute of Engineering in Life Sciences, Section IV: Biomolecular Separation Engineering, Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany.
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44
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Dry-powder formulations of non-covalent protein complexes with linear or miktoarm copolymers for pulmonary delivery. Int J Pharm 2018; 540:78-88. [DOI: 10.1016/j.ijpharm.2018.02.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Revised: 01/26/2018] [Accepted: 02/04/2018] [Indexed: 12/26/2022]
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45
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Zuidema JM, Kumeria T, Kim D, Kang J, Wang J, Hollett G, Zhang X, Roberts DS, Chan N, Dowling C, Blanco-Suarez E, Allen NJ, Tuszynski MH, Sailor MJ. Oriented Nanofibrous Polymer Scaffolds Containing Protein-Loaded Porous Silicon Generated by Spray Nebulization. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1706785. [PMID: 29363828 PMCID: PMC6475500 DOI: 10.1002/adma.201706785] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Revised: 12/13/2017] [Indexed: 06/07/2023]
Abstract
Oriented composite nanofibers consisting of porous silicon nanoparticles (pSiNPs) embedded in a polycaprolactone or poly(lactide-co-glycolide) matrix are prepared by spray nebulization from chloroform solutions using an airbrush. The nanofibers can be oriented by an appropriate positioning of the airbrush nozzle, and they can direct growth of neurites from rat dorsal root ganglion neurons. When loaded with the model protein lysozyme, the pSiNPs allow the generation of nanofiber scaffolds that carry and deliver the protein under physiologic conditions (phosphate-buffered saline (PBS), at 37 °C) for up to 60 d, retaining 75% of the enzymatic activity over this time period. The mass loading of protein in the pSiNPs is 36%, and in the resulting polymer/pSiNP scaffolds it is 3.6%. The use of pSiNPs that display intrinsic photoluminescence (from the quantum-confined Si nanostructure) allows the polymer/pSiNP composites to be definitively identified and tracked by time-gated photoluminescence imaging. The remarkable ability of the pSiNPs to protect the protein payload from denaturation, both during processing and for the duration of the long-term aqueous release study, establishes a model for the generation of biodegradable nanofiber scaffolds that can load and deliver sensitive biologics.
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Affiliation(s)
- Jonathan M. Zuidema
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093 (USA)
| | - Tushar Kumeria
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093 (USA), School of Pharmacy, University of Queensland, 20 Cornwall Street, Woolloongabba, Brisbane, Queensland 4102, Australia
| | - Dokyoung Kim
- Department of Anatomy and Neurobiology, College of Medicine, Kyung Hee University, 26 Kyungheedae-Ro, Dongdaemun-Gu, Seoul 02447, Republic of Korea
| | - Jinyoung Kang
- Department of Nanoengineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093 (USA)
| | - Joanna Wang
- Materials Science and Engineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093 (USA)
| | - Geoffrey Hollett
- Materials Science and Engineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093 (USA)
| | - Xuan Zhang
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093 (USA)
| | - David S. Roberts
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093 (USA)
| | - Nicole Chan
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093 (USA)
| | - Cari Dowling
- Molecular Neurobiology Laboratory, Salk Institute for Biological Studies, 10010 N Torrey Pines, La Jolla, CA, 92037 (USA)
| | - Elena Blanco-Suarez
- Molecular Neurobiology Laboratory, Salk Institute for Biological Studies, 10010 N Torrey Pines, La Jolla, CA, 92037 (USA)
| | - Nicola J. Allen
- Molecular Neurobiology Laboratory, Salk Institute for Biological Studies, 10010 N Torrey Pines, La Jolla, CA, 92037 (USA)
| | - Mark H. Tuszynski
- Veterans Administration Medical Center, 3350 La Jolla Village Drive, San Diego, CA, 92161 (USA), Department of Neurosciences, University of California, San Diego, 9500 Gilman, La Jolla, CA 92093 (USA)
| | - Michael J. Sailor
- Department of Chemistry and BiochemistryUniversity of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093 (USA)
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47
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Xia Z, Williams ER. Protein-Glass Surface Interactions and Ion Desalting in Electrospray Ionization with Submicron Emitters. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2018; 29:194-202. [PMID: 29027129 DOI: 10.1007/s13361-017-1825-6] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Revised: 09/28/2017] [Accepted: 09/28/2017] [Indexed: 05/27/2023]
Abstract
Theta glass electrospray emitters can rapidly mix solutions to investigate fast reactions that occur as quickly as 1 μs, but emitters with submicron tips have the unusual properties of desalting protein ions and affecting the observed abundances of some proteins as a result of protein-surface interactions. The role of protein physical properties on ion signal was investigated using 1.7 ± 0.1 μm and 269 ± 7 nm emitters and 100 mM aqueous ammonium acetate or ammonium bicarbonate solutions. Protein ion desalting occurs for both positive and negative ions. The signal of a mixture of proteins with the 269 nm tips is time-dependent and the order in which ions of each protein is observed is related to the expected strengths of the protein-surface interactions. These results indicate that it is not just the high surface-to-volume ratio that plays a role in protein adsorption and reduction or absence of initial ion signal, but the small diffusion distance and extremely low flow rates of the smaller emitters can lead to complete adsorption of some proteins and loss of signal until the adsorption sites are filled and the zeta potential is significantly reduced. After about 30 min, signals for a protein mixture from the two different size capillaries are similar. These results show the advantages of submicron emitters but also indicate that surface effects must be taken into account in experiments using such small tips or that coating the emitter surface to prevent adsorption should be considered. Graphical Abstract.
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Affiliation(s)
- Zije Xia
- Department of Chemistry, University of California, Berkeley, CA, 94720-1460, USA
| | - Evan R Williams
- Department of Chemistry, University of California, Berkeley, CA, 94720-1460, USA.
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48
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Lošdorfer Božič A, Podgornik R. pH Dependence of Charge Multipole Moments in Proteins. Biophys J 2017; 113:1454-1465. [PMID: 28978439 DOI: 10.1016/j.bpj.2017.08.017] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Revised: 08/10/2017] [Accepted: 08/11/2017] [Indexed: 11/26/2022] Open
Abstract
Electrostatic interactions play a fundamental role in the structure and function of proteins. Due to ionizable amino acid residues present on the solvent-exposed surfaces of proteins, the protein charge is not constant but varies with the changes in the environment-most notably, the pH of the surrounding solution. We study the effects of pH on the charge of four globular proteins by expanding their surface charge distributions in terms of multipoles. The detailed representation of the charges on the proteins is in this way replaced by the magnitudes and orientations of the multipole moments of varying order. Focusing on the three lowest-order multipoles-the total charge, dipole, and quadrupole moment-we show that the value of pH influences not only their magnitudes, but more notably and importantly also the spatial orientation of their principal axes. Our findings imply important consequences for the study of protein-protein interactions and the assembly of both proteinaceous shells and patchy colloids with dissociable charge groups.
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Affiliation(s)
| | - Rudolf Podgornik
- Department of Theoretical Physics, Jožef Stefan Institute, Ljubljana, Slovenia; Department of Physics, Faculty of Mathematics and Physics, University of Ljubljana, Ljubljana, Slovenia
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49
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Iijima K, Iizuka A, Suzuki R, Ueno-Yokohata H, Kiyokawa N, Hashizume M. Effect of protein adsorption layers and solution treatments on hydroxyapatite deposition on polystyrene plate surfaces in simulated body fluids. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2017; 28:193. [PMID: 29143139 DOI: 10.1007/s10856-017-6003-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Accepted: 11/08/2017] [Indexed: 06/07/2023]
Abstract
We have developed a method to functionalize polystyrene (PS) cell culture plates with hydroxyapatite (HAp) via protein adsorption layers such as human serum albumin (HSA) in simulated body fluids (SBFs). In order to investigate the versatility the method, in this study the effect of protein adsorption layers on HAp deposition on PS plate surfaces in SBF was evaluated. Pretreatments with alternate soaking process (ASP) using solutions containing calcium ions and phosphate ions followed by incubation with SBF for 24 h resulted in HAp deposition on PS plates with adsorption layers of HSA, type I collagen, hen egg white lysozyme, and poly L-glutamic acid, an acidic protein analogue: the deposition behaviors were correlated with adsorption ability and charge state of proteins. We also demonstrated that commercially available tissue culture-treated PS (TCPS) were directly coated with bone-like HAp using the same ASP and SBF processes. Human mesenchymal stem cells adhered and stretched on the HAp-coated TCPS plates in a similar manner to the case of the HAp-coated PS plates prepared via HSA adsorption layers. The results indicate that the present methods are useful for preparing bone-like HAp-coated cell culture plates that can be utilized function of adsorbed proteins and that are obtainable conveniently and at low-cost.
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Affiliation(s)
- Kazutoshi Iijima
- Faculty of Engineering, Department of Industrial Chemistry, Tokyo University of Science, 12-1 Ichigayafunagawara-machi, Shinjuku-ku, Tokyo, 162-0826, Japan
- Graduate School of Chemical Sciences and Technology, Tokyo University of Science, 12-1 Ichigayafunagawara-machi, Shinjuku-ku, Tokyo, 162-0826, Japan
| | - Ayako Iizuka
- Faculty of Engineering, Department of Industrial Chemistry, Tokyo University of Science, 12-1 Ichigayafunagawara-machi, Shinjuku-ku, Tokyo, 162-0826, Japan
| | - Ryo Suzuki
- Graduate School of Chemical Sciences and Technology, Tokyo University of Science, 12-1 Ichigayafunagawara-machi, Shinjuku-ku, Tokyo, 162-0826, Japan
| | - Hitomi Ueno-Yokohata
- Department of Pediatric Hematology and Oncology Research, National Research Institute for Child Health and Development, 2-10-1, Okura, Setagaya-ku, Tokyo, 157-8535, Japan
| | - Nobutaka Kiyokawa
- Department of Pediatric Hematology and Oncology Research, National Research Institute for Child Health and Development, 2-10-1, Okura, Setagaya-ku, Tokyo, 157-8535, Japan
| | - Mineo Hashizume
- Faculty of Engineering, Department of Industrial Chemistry, Tokyo University of Science, 12-1 Ichigayafunagawara-machi, Shinjuku-ku, Tokyo, 162-0826, Japan.
- Graduate School of Chemical Sciences and Technology, Tokyo University of Science, 12-1 Ichigayafunagawara-machi, Shinjuku-ku, Tokyo, 162-0826, Japan.
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50
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Jain E, Sheth S, Dunn A, Zustiak SP, Sell SA. Sustained release of multicomponent platelet-rich plasma proteins from hydrolytically degradable PEG hydrogels. J Biomed Mater Res A 2017; 105:3304-3314. [PMID: 28865187 DOI: 10.1002/jbm.a.36187] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Revised: 07/12/2017] [Accepted: 08/15/2017] [Indexed: 12/14/2022]
Abstract
Platelet-rich plasma (PRP), an autologous blood derived product is a concentrated mix of multiple growth factors and cytokines. Direct injections of PRP are clinically used for treatment of various musculoskeletal disorders and in wound healing. However, PRP therapy has met with limited clinical success possibly due to unpredictable and premature bolus delivery of PRP growth factors. The objective of this study was to predictably control the bioavailability of PRP growth factors using a hydrolytically degradable polyethylene glycol (PEG) hydrogel. We used a step-growth polymerization based on a Michael-type addition reaction between a 6-arm PEG-acrylate and a dithiol crosslinker, which led to the formation of a homogenous hydrogel network under mild, physiologically relevant conditions. Specifically, to model the release of multicomponent PRP through PEG hydrogels, we examined bulk diffusion of PRP as well as model proteins in a size range corresponding to that of growth factors found in PRP. Our results indicated that protein size and hydrogel degradation controlled diffusion of all proteins and that secondary structure of proteins encapsulated during gelation remained unaffected post-release. Analysis of specific PRP proteins released from the hydrogel showed sustained release until complete hydrogel degradation. PRP released from hydrogels promoted proliferation of human dermal fibroblast, indicating retained bioactivity upon encapsulation and release. The versatile hydrogel system holds clinical potential as a therapeutic drug delivery depot of multicomponent mixtures like PRP. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 105A: 3304-3314, 2017.
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Affiliation(s)
- Era Jain
- Department of Biomedical Engineering, , Saint Louis University, Saint Louis, Missouri, 63103
| | - Saahil Sheth
- Department of Biomedical Engineering, , Saint Louis University, Saint Louis, Missouri, 63103
| | - Andrew Dunn
- Department of Biomedical Engineering, , Saint Louis University, Saint Louis, Missouri, 63103
| | - Silviya P Zustiak
- Department of Biomedical Engineering, , Saint Louis University, Saint Louis, Missouri, 63103
| | - Scott A Sell
- Department of Biomedical Engineering, , Saint Louis University, Saint Louis, Missouri, 63103
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