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Popova TO, Zhulina EB, Borisov OV. Interaction of Polyanionic and Polycationic Brushes with Globular Proteins and Protein-like Nanocolloids. Biomimetics (Basel) 2023; 8:597. [PMID: 38132536 PMCID: PMC10741738 DOI: 10.3390/biomimetics8080597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 11/25/2023] [Accepted: 12/06/2023] [Indexed: 12/23/2023] Open
Abstract
A large number of experimental studies have demonstrated that globular proteins can be absorbed from the solution by both polycationic and polyanionic brushes when the net charge of protein globules is of the same or of the opposite sign with respect to that of brush-forming polyelectrolyte chains. Here, we overview the results of experimental studies on interactions between globular proteins and polycationic or polyanionic brushes, and present a self-consistent field theoretical model that allows us to account for the asymmetry of interactions of protein-like nanocolloid particles comprising weak (pH-sensitive) cationic and anionic groups with a positively or negatively charged polyelectrolyte brush. The position-dependent insertion free energy and the net charge of the particle are calculated. The theoretical model predicts that if the numbers of cationic and anionic ionizable groups of the protein are approximately equal, then the interaction patterns for both cationic and anionic brushes at equal offset on the "wrong side" from the isoelectric point (IEP), i.e., when the particle and the brush charge are of the same sign, are similar. An essential asymmetry in interactions of particles with polycationic and polyanionic brushes is predicted when fractions of cationic and anionic groups differ significantly. That is, at a pH above IEP, the anionic brush better absorbs negatively charged particles with a larger fraction of ionizable cationic groups and vice versa.
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Affiliation(s)
- Tatiana O. Popova
- Chemical Engineering Center, National Research University ITMO, 199004 St. Petersburg, Russia;
- Institute of Macromolecular Compoundsof the Russian Academy of Sciences, 199004 St. Petersburg, Russia;
| | - Ekaterina B. Zhulina
- Institute of Macromolecular Compoundsof the Russian Academy of Sciences, 199004 St. Petersburg, Russia;
| | - Oleg V. Borisov
- Chemical Engineering Center, National Research University ITMO, 199004 St. Petersburg, Russia;
- Institute of Macromolecular Compoundsof the Russian Academy of Sciences, 199004 St. Petersburg, Russia;
- CNRS, Université de Pau et des Pays de l’Adour UMR 5254, Institut des Sciences Analytiques et de Physico-Chimie Pour l’Environnement et les Matériaux, 64053 Pau, France
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2
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Apuzzo E, Agazzi M, Herrera SE, Picco A, Rizzo G, Chavero C, Bianchi D, Smaldini P, Cortez ML, Marmisollé WA, Padula G, Seoane A, Alomar ML, Denofrio MP, Docena G, Azzaroni O. Poly(allylamine)-tripolyphosphate Ionic Assemblies as Nanocarriers: Friend or Foe? ACS APPLIED BIO MATERIALS 2023; 6:4714-4727. [PMID: 37863908 DOI: 10.1021/acsabm.3c00489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2023]
Abstract
Designing effective drug nanocarriers that are easy to synthesize, robust, and nontoxic is a significant challenge in nanomedicine. Polyamine-multivalent molecule nanocomplexes are promising drug carriers due to their simple and all-aqueous manufacturing process. However, these systems can present issues of colloidal instability over time and cellular toxicity due to the cationic polymer. In this study, we finely modulate the formation parameters of poly(allylamine-tripolyphosphate) complexes to jointly optimize the robustness and safety. Polyallylamine was ionically assembled with tripolyphosphate anions to form liquid-like nanocomplexes with a size of around 200 nm and a zeta potential of -30 mV. We found that nanocomplexes exhibit tremendous long-term stability (9 months of storage) in colloidal dispersion and that they are suitable as protein-loading agents. Moreover, the formation of nanocomplexes induced by tripolyphosphate anions produces a switch-off in the toxicity of the system by altering the overall charge from positive to negative. In addition, we demonstrate that nanocomplexes can be internalized by bone-marrow-derived macrophage cells. Altogether, these nanocomplexes have attractive and promising properties as delivery nanoplatforms for potential therapies based on the immune system activation.
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Affiliation(s)
- Eugenia Apuzzo
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), (UNLP, CONICET), 1900 La Plata, Buenos Aires, Argentina
| | - Maximiliano Agazzi
- Instituto para el Desarrollo Agroindustrial y de la Salud (IDAS), (UNRC, CONICET), Ruta Nacional 36 KM 601, 5800 Río Cuarto, Córdoba, Argentina
| | - Santiago E Herrera
- Instituto de Química de los Materiales, Ambiente y Energía (INQUIMAE), (UBA, CONICET), C1428EGA Buenos Aires, Argentina
| | - Agustín Picco
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), (UNLP, CONICET), 1900 La Plata, Buenos Aires, Argentina
| | - Gastón Rizzo
- Instituto de Estudios Inmunológicos y Fisiopatológicos (IIFP), (UNLP, CONICET), asociado a CIC-PBA, 1900 La Plata, Buenos Aires ,Argentina
| | - Camila Chavero
- Instituto de Estudios Inmunológicos y Fisiopatológicos (IIFP), (UNLP, CONICET), asociado a CIC-PBA, 1900 La Plata, Buenos Aires ,Argentina
| | - Daiana Bianchi
- Instituto de Estudios Inmunológicos y Fisiopatológicos (IIFP), (UNLP, CONICET), asociado a CIC-PBA, 1900 La Plata, Buenos Aires ,Argentina
| | - Paola Smaldini
- Instituto de Estudios Inmunológicos y Fisiopatológicos (IIFP), (UNLP, CONICET), asociado a CIC-PBA, 1900 La Plata, Buenos Aires ,Argentina
| | - María Lorena Cortez
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), (UNLP, CONICET), 1900 La Plata, Buenos Aires, Argentina
| | - Waldemar A Marmisollé
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), (UNLP, CONICET), 1900 La Plata, Buenos Aires, Argentina
| | - Gisel Padula
- Instituto de Genética Veterinaria "Ing. Fernando Noel Dulout" (IGEVET), (UNLP, CONICET), 1900 La Plata, Buenos Aires, Argentina
- Facultad de Ciencias Naturales y Museo (FCNyM), (UNLP, CONICET), 1900 La Plata, Buenos Aires ,Argentina
| | - Analía Seoane
- Instituto de Genética Veterinaria "Ing. Fernando Noel Dulout" (IGEVET), (UNLP, CONICET), 1900 La Plata, Buenos Aires, Argentina
| | - Maria Lis Alomar
- Instituto Tecnológico de Chascomús (INTECH), (UNSAM, CONICET) 7130, Chascomús, Buenos Aires ,Argentina
| | - Maria Paula Denofrio
- Instituto Tecnológico de Chascomús (INTECH), (UNSAM, CONICET) 7130, Chascomús, Buenos Aires ,Argentina
| | - Guillermo Docena
- Instituto de Estudios Inmunológicos y Fisiopatológicos (IIFP), (UNLP, CONICET), asociado a CIC-PBA, 1900 La Plata, Buenos Aires ,Argentina
| | - Omar Azzaroni
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), (UNLP, CONICET), 1900 La Plata, Buenos Aires, Argentina
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Guo L, Chen J, Fang S, Li YH, Song YC, Meng YC. Effect of protein topology on hierarchical complexation of epsilon-polylysine and protein: A multiscale structural analysis. Food Hydrocoll 2022. [DOI: 10.1016/j.foodhyd.2021.107431] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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4
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Lombardi V, Trande M, Back M, Patwardhan SV, Benedetti A. Facile Cellulase Immobilisation on Bioinspired Silica. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:626. [PMID: 35214956 PMCID: PMC8880491 DOI: 10.3390/nano12040626] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 02/07/2022] [Accepted: 02/10/2022] [Indexed: 11/16/2022]
Abstract
Cellulases are enzymes with great potential for converting biomass to biofuels for sustainable energy. However, their commercial use is limited by their costs and low reusability. Therefore, the scientific and industrial sectors are focusing on finding better strategies to reuse enzymes and improve their performance. In this work, cellulase from Aspergillus niger was immobilised through in situ entrapment and adsorption on bio-inspired silica (BIS) supports. To the best of our knowledge, this green effect strategy has never been applied for cellulase into BIS. In situ entrapment was performed during support synthesis, applying a one-pot approach at mild conditions (room temperature, pH 7, and water solvent), while adsorption was performed after support formation. The loading efficiency was investigated on different immobilisation systems by Bradford assay and FTIR. Bovine serum albumin (BSA) was chosen as a control to optimize cellulase loading. The residual activity of cellulase was analysed by the dinitro salicylic acid (DNS) method. Activity of 90% was observed for the entrapped enzyme, while activity of ~55% was observed for the adsorbed enzyme. Moreover, the supported enzyme systems were recycled five times to evaluate their reuse potential. The thermal and pH stability tests suggested that both entrapment and adsorption strategies can increase enzyme activity. The results highlight that the entrapment in BIS is a potentially useful strategy to easily immobilise enzymes, while preserving their stability and recycle potential.
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Affiliation(s)
- Vincenzo Lombardi
- Department of Molecular Sciences and Nanosystems, Ca’ Foscari University of Venice, Via Torino 155, 30172 Mestre, Italy;
| | - Matteo Trande
- Department of Biotechnology, University of Manchester, 131 Princess Street, Manchester M1 7DN, UK;
| | - Michele Back
- Department of Molecular Sciences and Nanosystems, Ca’ Foscari University of Venice, Via Torino 155, 30172 Mestre, Italy;
| | - Siddharth V. Patwardhan
- Department of Chemical and Biological Engineering, The University of Sheffield, Mappin Street, Sheffield S1 3JD, UK
| | - Alvise Benedetti
- Department of Molecular Sciences and Nanosystems, Ca’ Foscari University of Venice, Via Torino 155, 30172 Mestre, Italy;
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Interaction of Linear Polyelectrolytes with Proteins: Role of Specific Charge-Charge Interaction and Ionic Strength. Biomolecules 2021; 11:biom11091377. [PMID: 34572590 PMCID: PMC8472085 DOI: 10.3390/biom11091377] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 09/10/2021] [Accepted: 09/13/2021] [Indexed: 11/26/2022] Open
Abstract
We present a thermodynamic study of the interaction of synthetic, linear polyelectrolytes with bovine serum albumin (BSA). All polyelectrolytes are based on poly(allyl glycidyl ether) which has been modified by polymer-analogous reaction with anionic (-SO3Na), cationic (-NH3Cl or -NHMe2Cl) or zwitterionic groups (-NMe2(CH2)3SO3). While the anionic polymer shows a very weak interaction, the zwitterionic polymer exhibits no interaction with BSA (pI = 4.7) under the applied pH = 7.4, ionic strength (I = 23–80 mM) and temperature conditions (T = 20–37 °C). A strong binding, however, was observed for the polycations bearing primary amino or tertiary dimethyl amino groups, which could be analysed in detail by isothermal titration calorimetry (ITC). The analysis was done using an expression which describes the free energy of binding, ΔGb, as the function of the two decisive variables, temperature, T, and salt concentration, cs. The underlying model splits ΔGb into a term related to counterion release and a term related to water release. While the number of released counter ions is similar for both systems, the release of bound water is more important for the primary amine compared to the tertiary N,N-dimethyl amine presenting polymer. This finding is further traced back to a closer contact of the polymers’ protonated primary amino groups in the complex with oppositely charged moieties of BSA as compared to the bulkier protonated tertiary amine groups. We thus present an investigation that quantifies both driving forces for electrostatic binding, namely counterion release and change of hydration, which contribute to a deeper understanding with direct impact on future advancements in the biomedical field.
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Xie Y, Xu Y, Xu J. pH-responsive pickering foam created from self-aggregate polymer using dynamic covalent bond. J Colloid Interface Sci 2021; 597:383-392. [PMID: 33894546 DOI: 10.1016/j.jcis.2021.04.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 03/16/2021] [Accepted: 04/02/2021] [Indexed: 12/01/2022]
Abstract
HYPOTHESIS Responsive surfactant systems based on dynamic covalent bond exhibit an unsatisfactory foamability and foam stability, despite their documented functionality in emulsions. As such we anticipate that the foaming performance should be improved by introducing Pickering effect, which is possible when the responsiveness of the dynamic covenant bonds controls not only the hydrophobicity of polymers but also their aggregation behavior (to form nanoparticles). EXPERIMENTS Here we created surface active nanoparticles made from self-aggregated polymers consisting of PAH (polyallylamine hydrochloride)-BA (benzaldehyde). The covalent imine bonds between originally hydrophilic PAH and hydrophobic BA are dynamic in that their formation and breakage is a function of solution pH, confirmed by 1H NMR and dynamic interfacial tension measurement. FINDINGS At pH 7.4, a stable foam is achieved in the PAH-BA (amino to aldehyde ratio at 1:0.2) solution; while at pH 2.5, it defoams due to breakage of dynamic bonds corresponding to the measured diminishing surface activity. The reversibility of foaming-defoaming has been demonstrated by alternatively changing pH for multiple cycles, with the foaming performance persistent. The foam stability can be improved by more hydrophobic compounds e.g. at a lower amino to aldehyde ratio or using PAH-cinnamaldehyde (CA). The reversible and responsive foaming demonstrated in a Pickering system provides a new method to create novel foaming systems with properties desirable to many applications.
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Affiliation(s)
- Yiqian Xie
- Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan, Shandong 250100, PR China.
| | - Yuan Xu
- School of Chemical Engineering, The University of Queensland, Brisbane, QLD 4072, Australia.
| | - Jian Xu
- Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan, Shandong 250100, PR China.
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7
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Achazi K, Haag R, Ballauff M, Dernedde J, Kizhakkedathu JN, Maysinger D, Multhaup G. Understanding the Interaction of Polyelectrolyte Architectures with Proteins and Biosystems. Angew Chem Int Ed Engl 2021; 60:3882-3904. [PMID: 32589355 PMCID: PMC7894192 DOI: 10.1002/anie.202006457] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Indexed: 02/06/2023]
Abstract
The counterions neutralizing the charges on polyelectrolytes such as DNA or heparin may dissociate in water and greatly influence the interaction of such polyelectrolytes with biomolecules, particularly proteins. In this Review we give an overview of studies on the interaction of proteins with polyelectrolytes and how this knowledge can be used for medical applications. Counterion release was identified as the main driving force for the binding of proteins to polyelectrolytes: Patches of positive charge become multivalent counterions of the polyelectrolyte and lead to the release of counterions from the polyelectrolyte and a concomitant increase in entropy. This is shown from investigations on the interaction of proteins with natural and synthetic polyelectrolytes. Special emphasis is paid to sulfated dendritic polyglycerols (dPGS). The Review demonstrates that we are moving to a better understanding of charge-charge interactions in systems of biological relevance. Research along these lines will aid and promote the design of synthetic polyelectrolytes for medical applications.
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Affiliation(s)
- Katharina Achazi
- Institut für Chemie und BiochemieFreie Universität BerlinTakustrasse 314195BerlinGermany
| | - Rainer Haag
- Institut für Chemie und BiochemieFreie Universität BerlinTakustrasse 314195BerlinGermany
| | - Matthias Ballauff
- Institut für Chemie und BiochemieFreie Universität BerlinTakustrasse 314195BerlinGermany
- IRIS AdlershofHumboldt Universität zu BerlinZum Grossen Windkanal 612489BerlinGermany
| | - Jens Dernedde
- Charité-Universitätsmedizin BerlinInstitute of Laboratory MedicineClinical Chemistry, and PathobiochemistryCVK Augustenburger Platz 113353BerlinGermany
| | - Jayachandran N. Kizhakkedathu
- Centre for Blood ResearchDepartment of Pathology and Laboratory MedicineLife Science InstituteDepartment of ChemistrySchool of Biomedical EngineeringUniversity of British ColumbiaVancouverV6T 1Z3Canada
| | - Dusica Maysinger
- Department of Pharmacology and TherapeuticsMcGill UniversityMontrealH3G 1Y6Canada
| | - Gerd Multhaup
- Department of Pharmacology and TherapeuticsMcGill UniversityMontrealH3G 1Y6Canada
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Achazi K, Haag R, Ballauff M, Dernedde J, Kizhakkedathu JN, Maysinger D, Multhaup G. Wechselwirkung von Polyelektrolyt‐Architekturen mit Proteinen und Biosystemen. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202006457] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Katharina Achazi
- Institut für Chemie und Biochemie Freie Universität Berlin Takustraße 3 14195 Berlin Deutschland
| | - Rainer Haag
- Institut für Chemie und Biochemie Freie Universität Berlin Takustraße 3 14195 Berlin Deutschland
| | - Matthias Ballauff
- Institut für Chemie und Biochemie Freie Universität Berlin Takustraße 3 14195 Berlin Deutschland
- IRIS Adlershof Humboldt-Universität zu Berlin Zum Großen Windkanal 6 12489 Berlin Deutschland
| | - Jens Dernedde
- Charité-Universitätsmedizin Berlin Institut für Laboratoriumsmedizin Klinische Chemie und Pathobiochemie CVK Augustenburger Platz 1 13353 Berlin Deutschland
| | - Jayachandran N. Kizhakkedathu
- Centre for Blood Research Department of Pathology and Laboratory Medicine Life Science Institute Department of Chemistry School of Biomedical Engineering University of British Columbia Vancouver V6T 1Z3 Kanada
| | - Dusica Maysinger
- Department of Pharmacology and Therapeutics McGill University Montreal H3G 1Y6 Kanada
| | - Gerd Multhaup
- Department of Pharmacology and Therapeutics McGill University Montreal H3G 1Y6 Kanada
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Gold nanoparticles disrupt actin organization and pulmonary endothelial barriers. Sci Rep 2020; 10:13320. [PMID: 32770112 PMCID: PMC7414109 DOI: 10.1038/s41598-020-70148-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Accepted: 06/26/2020] [Indexed: 12/11/2022] Open
Abstract
This study explored the impact of gold nanoparticles on the metabolic activity and morphology of human pulmonary endothelial cell monolayers. We developed a gold nanoparticle library of three different sizes and two surface chemistries that include anionic citrate and the cationic polyelectrolyte poly(allylamine hydrochloride). The nanoparticles were characterized in cell culture medium to assess how their physical properties are altered after exposure to biological fluids. A bovine serum albumin pretreatment protocol was developed to stabilize the nanoparticles in cell culture medium. Results of this study show that an 18 h exposure of human pulmonary artery endothelial cells to the different nanoparticles modestly affects cellular metabolic activity. However, nanoparticle exposure perturbs the cortical actin networks and induces the formation of intercellular gaps. In particular, exposure to the poly(allylamine hydrochloride)-coated particles reduces the area of cell-cell junctions-a change that correlates with increased leakiness of endothelial barriers. The presence of excess polyelectrolyte capping agents in the supernatant of poly(allylamine hydrochloride)-coated nanoparticles significantly impacts endothelial morphology. Pretreatment of the particle supernatant with bovine serum albumin mitigates the negative effects of free or bound polyelectrolytes on endothelial cell monolayers.
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10
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Liu J, Shim YY, Reaney MJT. Ionic strength and hydrogen bonding effects on whey protein isolate-flaxseed gum coacervate rheology. Food Sci Nutr 2020; 8:2102-2111. [PMID: 32328277 PMCID: PMC7174241 DOI: 10.1002/fsn3.1504] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 01/31/2020] [Accepted: 02/04/2020] [Indexed: 11/07/2022] Open
Abstract
Whey protein isolate (WPI) was mixed with anionic flaxseed (Linum usitatissimum L.) gum (FG), and phase transition during coacervate formation was monitored. Effects of ionic strength and hydrogen bonding on coacervation of WPI-FG system and corresponding rheological properties were investigated. During coacervate formation, structural transitions were confirmed by both turbidimetry and confocal laser scanning microscopy. Increasing ionic strength with sodium chloride (50 mM) decreased optical density (600 nm) at pHmax. Correspondingly, pHc and pHϕ1 decreased from pH 5.4 to 4.8 and from 5.0 to 4.6, respectively, while pHϕ2 increased from pH 1.8 to 2.4. Sodium chloride suppressed biopolymer electrostatic interactions and reduced coacervate formation. Adding urea (100 mM) shifted pHϕ1, pHmax, and pHϕ2 from 4.8, 3.8, and 1.8 to 5.0, 4.0, and 2.2, respectively, while pHc was unaffected. Optical density (600 nm) at pHmax (0.536) was lower than that of control in the absence of urea (0.617). This confirmed the role of hydrogen bonding during coacervate formation in the biopolymer system composed of WPI and FG. Dynamic shear behavior and viscoelasticity of collected coacervates were measured, and both shear-thinning behavior and gel-like properties were observed. Addition of sodium chloride and urea reduced ionic strength and hydrogen bonding, resulting in decreased WPI-FG coacervate dynamic viscosity and viscoelasticity. The disturbed charge balance contributed to a loosely packed structure of coacervates which were less affected by altered hydrogen bonding. Findings obtained here will help to predict flaxseed gum behavior in protein-based foods.
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Affiliation(s)
- Jun Liu
- Beijing Advanced Innovation Center for Food Nutrition and Human HealthCollege of Food Science and Nutritional EngineeringChina Agricultural UniversityBeijingChina
- Department of Plant SciencesUniversity of SaskatchewanSaskatoonSKCanada
| | - Youn Young Shim
- Department of Plant SciencesUniversity of SaskatchewanSaskatoonSKCanada
- Prairie Tide Diversified Inc.SaskatoonSKCanada
- Department of Food Science and EngineeringGuangdong Saskatchewan Oilseed Joint LaboratoryJinan UniversityGuangzhou, GuangdongChina
- Department of Integrative Biotechnology, College of Biotechnology and BioengineeringSungkyunkwan UniversitySuwon, Gyeonggi-doKorea
| | - Martin J. T. Reaney
- Department of Plant SciencesUniversity of SaskatchewanSaskatoonSKCanada
- Prairie Tide Diversified Inc.SaskatoonSKCanada
- Department of Food Science and EngineeringGuangdong Saskatchewan Oilseed Joint LaboratoryJinan UniversityGuangzhou, GuangdongChina
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11
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Atif M, Chen C, Irfan M, Mumtaz F, He K, Zhang M, Chen L, Wang Y. Poly(2-methyl-2-oxazoline) and poly(4-vinyl pyridine) based mixed brushes with switchable ability toward protein adsorption. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2019.08.026] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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12
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Complexation of pectins varying in overall charge with lysozyme in aqueous buffered solutions. Food Hydrocoll 2019. [DOI: 10.1016/j.foodhyd.2019.02.049] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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13
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Gao S, Holkar A, Srivastava S. Protein-Polyelectrolyte Complexes and Micellar Assemblies. Polymers (Basel) 2019; 11:E1097. [PMID: 31261765 PMCID: PMC6680422 DOI: 10.3390/polym11071097] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Revised: 06/20/2019] [Accepted: 06/24/2019] [Indexed: 12/18/2022] Open
Abstract
In this review, we highlight the recent progress in our understanding of the structure, properties and applications of protein-polyelectrolyte complexes in both bulk and micellar assemblies. Protein-polyelectrolyte complexes form the basis of the genetic code, enable facile protein purification, and have emerged as enterprising candidates for simulating protocellular environments and as efficient enzymatic bioreactors. Such complexes undergo self-assembly in bulk due to a combined influence of electrostatic interactions and entropy gains from counterion release. Diversifying the self-assembly by incorporation of block polyelectrolytes has further enabled fabrication of protein-polyelectrolyte complex micelles that are multifunctional carriers for therapeutic targeted delivery of proteins such as enzymes and antibodies. We discuss research efforts focused on the structure, properties and applications of protein-polyelectrolyte complexes in both bulk and micellar assemblies, along with the influences of amphoteric nature of proteins accompanying patchy distribution of charges leading to unique phenomena including multiple complexation windows and complexation on the wrong side of the isoelectric point.
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Affiliation(s)
- Shang Gao
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles, CA 90095, USA.
| | - Advait Holkar
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles, CA 90095, USA.
| | - Samanvaya Srivastava
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles, CA 90095, USA.
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14
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Xu X, Angioletti-Uberti S, Lu Y, Dzubiella J, Ballauff M. Interaction of Proteins with Polyelectrolytes: Comparison of Theory to Experiment. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:5373-5391. [PMID: 30095921 DOI: 10.1021/acs.langmuir.8b01802] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We discuss recent investigations of the interaction of polyelectrolytes with proteins. In particular, we review our recent studies on the interaction of simple proteins such as human serum albumin (HSA) and lysozyme with linear polyelectrolytes, charged dendrimers, charged networks, and polyelectrolyte brushes. In all cases discussed here, we combined experimental work with molecular dynamics (MD) simulations and mean-field theories. In particular, isothermal titration calorimetry (ITC) has been employed to obtain the respective binding constants Kb and the Gibbs free energy of binding. MD simulations with explicit counterions but implicit water demonstrate that counterion release is the main driving force for the binding of proteins to strongly charged polyelectrolytes: patches of positive charges located on the surface of the protein become multivalent counterions of the polyelectrolyte, thereby releasing a number of counterions condensed on the polyelectrolyte. The binding Gibbs free energy due to counterion release is predicted to scale with the logarithm of the salt concentration in the system, which is verified by both simulations and experiment. In several cases, namely, for the interaction of proteins with linear polyelectrolytes and highly charged hydrophilic dendrimers, the binding constant could be calculated from simulations to very good approximation. This finding demonstrated that in these cases explicit hydration effects do not contribute to the Gibbs free energy of binding. The Gibbs free energy can also be used to predict the kinetics of protein uptake by microgels for a given system by applying dynamic density functional theory. The entire discussion demonstrates that the direct comparison of theory with experiments can lead to a full understanding of the interaction of proteins with charged polymers. Possible implications for applications, such as drug design, are discussed.
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Affiliation(s)
- Xiao Xu
- School of Chemical Engineering , Nanjing University of Science and Technology , 200 Xiao Ling Wei , Nanjing 210094 , P. R. China
| | - Stefano Angioletti-Uberti
- Department of Materials , Imperial College London , London SW7 2AZ - UK , U.K
- International Research Centre for Soft Matter , Beijing University of Chemical Technology , 100099 Beijing , PR China
| | - Yan Lu
- Soft Matter and Functional Materials , Helmholtz-Zentrum Berlin für Materialien und Energie GmbH , 14109 Berlin , Germany
- Institute of Chemistry , University of Potsdam , 14467 Potsdam , Germany
| | - Joachim Dzubiella
- Soft Matter and Functional Materials , Helmholtz-Zentrum Berlin für Materialien und Energie GmbH , 14109 Berlin , Germany
- Physikalisches Institut , Albert-Ludwigs-Universität , 79104 Freiburg , Germany
| | - Matthias Ballauff
- Soft Matter and Functional Materials , Helmholtz-Zentrum Berlin für Materialien und Energie GmbH , 14109 Berlin , Germany
- Institut für Physik , Humboldt-Universität zu Berlin , 12489 Berlin , Germany
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15
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Russell BA, Jachimska B, Chen Y. Polyallylamine hydrochloride coating enhances the fluorescence emission of Human Serum Albumin encapsulated gold nanoclusters. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2018; 187:131-135. [PMID: 30145463 DOI: 10.1016/j.jphotobiol.2018.08.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 08/10/2018] [Accepted: 08/15/2018] [Indexed: 11/28/2022]
Abstract
Protein encapsulated gold nanoclusters have received much attention due to the possibility of using them as a non-toxic fluorescent probe or marker for biomedical applications, however one major disadvantage currently is their low brightness and quantum yield in comparison to currently used fluorescent markers. A method of increasing the fluorescence emission of Human Serum Albumin (HSA) encapsulated gold nanoclusters (AuNCs) via a Polyallylamide hydrochloride (PAH) coating is described. PAH molecules with a molecular weight of ~17,500 Da were found to enhance the fluorescence emission of HSA-AuNCs by 3-fold when the protein/polymer concentration ratio is 2:1 in solution. Interestingly, the fluorescence lifetime of the AuNCs was found to decrease while the native tryptophan (TRP) fluorescence lifetime also decreased during the fluorescence emission intensity enhancement caused by the PAH binding. Coinciding with the decrease in fluorescence lifetime, the zeta potential of the system was observed to be zero during maximum fluorescence intensity enhancement, causing the formation of large aggregates. These results suggest that PAH binds to the HSA-AuNCs acting as a linker; causing aggregation and rigidification, which results in a decrease in separation between native TRP of HSA and AuNCs; improving Förster Resonance Energy Transfer (FRET) and increasing the fluorescence emission intensity. These findings are critical to the development of brighter protein encapsulated AuNCs.
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Affiliation(s)
- Ben Allan Russell
- Department of Physics, University of Strathclyde, Glasgow G4 0NG, United Kingdom.
| | - Barbara Jachimska
- Jerzy Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences, Krakow PL-30329, Poland
| | - Yu Chen
- Department of Physics, University of Strathclyde, Glasgow G4 0NG, United Kingdom
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16
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Han L, Yan B, Zhang L, Wu M, Wang J, Huang J, Deng Y, Zeng H. Tuning protein adsorption on charged polyelectrolyte brushes via salinity adjustment. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2017.12.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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17
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Nanoparticulation of bovine serum albumin and poly-d-lysine through complex coacervation and encapsulation of curcumin. Colloids Surf B Biointerfaces 2017; 159:759-769. [DOI: 10.1016/j.colsurfb.2017.08.047] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2016] [Revised: 07/29/2017] [Accepted: 08/25/2017] [Indexed: 12/19/2022]
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18
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Lin W, Murphy CJ. A Demonstration of Le Chatelier's Principle on the Nanoscale. ACS CENTRAL SCIENCE 2017; 3:1096-1102. [PMID: 29104926 PMCID: PMC5658755 DOI: 10.1021/acscentsci.7b00302] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Indexed: 05/25/2023]
Abstract
Photothermal desorption of molecules from plasmonic nanoparticles is an example of a light-triggered molecular release due to heating of the system. However, this phenomenon ought to work only if the molecule-nanoparticle interaction is exothermic in nature. In this study, we compare protein adsorption behavior onto gold nanoparticles for both endothermic and exothermic complexation reactions, and demonstrate that Le Chatelier's principle can be applied to predict protein adsorption or desorption on nanomaterial surfaces. Polyelectrolyte-wrapped gold nanorods were used as adsorption platforms for two different proteins, which we were able to adsorb/desorb from the nanorod surface depending on the thermodynamics of their interactions. Furthermore, we show that the behaviors hold up under more complex biological environments such as fetal bovine serum.
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19
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Dennison JM, Zupancic JM, Lin W, Dwyer JH, Murphy CJ. Protein Adsorption to Charged Gold Nanospheres as a Function of Protein Deformability. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:7751-7761. [PMID: 28704605 DOI: 10.1021/acs.langmuir.7b01909] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The corona that forms as protein adsorbs to gold nanospheres (AuNSs) is directly influenced by the surface chemistry of the AuNS. Tools to predict adsorption outcomes are needed for intelligent design of nanomaterials for biological applications. We hypothesized that the denaturation behavior of a protein might be a useful predictor of adsorption behavior to AuNSs, and used this idea to study protein adsorption to anionic citrate-capped AuNSs and to cationic poly(allylamine hydrochloride) (PAH) wrapped AuNSs. Three proteins (α-amylase (A-Amy), β-lactoglobulin (BLG), and bovine serum albumin (BSA)), representing three different classes of acid denaturation behavior, were selected with BLG being the least deformable and BSA being the most deformable. Protein adsorption to AuNSs was monitored via UV-vis spectrophotometry and dynamic light scattering. Changes to the protein structure upon AuNS interaction were monitored via circular dichroism spectroscopy. Binding constants were determined using the Langmuir adsorption isotherm, resulting in BSA > BLG ≫ A-Amy affinities for citrate-capped gold nanospheres. PAH-coated AuNSs displayed little affinity for these proteins at similar concentrations as citrate-coated AuNSs and became agglomerated at high protein concentrations. The enzymatic activity of A-Amy/citrate AuNS conjugates was measured via colorimetric assay, and found to be 11% of free A-Amy, suggesting that binding restricts access to the active site. Across both citrate AuNSs and PAH AuNSs, the changes in secondary structure were greatest for BSA > A-Amy > BLG, which does follow the trends predicted by acid denaturation characteristics.
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Affiliation(s)
- Jordan M Dennison
- Department of Chemistry, University of Illinois at Urbana-Champaign , 600 Mathews Avenue, Urbana, Illinois 61801, United States
| | - Jennifer M Zupancic
- Department of Chemistry, University of Illinois at Urbana-Champaign , 600 Mathews Avenue, Urbana, Illinois 61801, United States
| | - Wayne Lin
- Department of Chemistry, University of Illinois at Urbana-Champaign , 600 Mathews Avenue, Urbana, Illinois 61801, United States
| | - Jonathan H Dwyer
- Department of Chemistry, University of Illinois at Urbana-Champaign , 600 Mathews Avenue, Urbana, Illinois 61801, United States
| | - Catherine J Murphy
- Department of Chemistry, University of Illinois at Urbana-Champaign , 600 Mathews Avenue, Urbana, Illinois 61801, United States
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20
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Zhao W, Jin K, Li J, Qiu X, Li S. Delivery of stromal cell-derived factor 1α for in situ tissue regeneration. J Biol Eng 2017; 11:22. [PMID: 28670340 PMCID: PMC5492719 DOI: 10.1186/s13036-017-0058-3] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Accepted: 03/29/2017] [Indexed: 02/06/2023] Open
Abstract
In situ tissue regeneration approach aims to exploit the body's own biological resources and reparative capability and recruit host cells by utilizing cell-instructive biomaterials. In order to immobilize and release bioactive factors in biomaterials, it is important to engineer the load effectiveness, release kinetics and cell recruiting capabilities of bioactive molecules by using suitable bonding strategies. Stromal cell-derived factor 1α (SDF-1α) is one of the most potent chemokines for stem cell recruitment, and SDF-1α-loaded scaffolds have been used for the regeneration of many types of tissues. This review summarizes the strategies to incorporate SDF-1α into scaffolds, including direct loading or adsorption, polyion complexes, specific heparin-mediated interaction and particulate system, which may be applied to the immobilization of other chemokines or growth factors. In addition, we discuss the application of these strategies in the regeneration of tissues such as blood vessel, myocardium, cartilage and bone.
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Affiliation(s)
- Wen Zhao
- Key Laboratory for Space Biosciences and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, Shaanxi 710072 China
| | - Kaixiang Jin
- Key Laboratory for Space Biosciences and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, Shaanxi 710072 China
| | - Jiaojiao Li
- Key Laboratory for Space Biosciences and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, Shaanxi 710072 China
| | - Xuefeng Qiu
- Department of Bioengineering and Department of Medicine, University of California, Los Angeles, CA 90095 USA
| | - Song Li
- Department of Bioengineering and Department of Medicine, University of California, Los Angeles, CA 90095 USA
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21
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Yu H, Nguyen MH, Cheow WS, Hadinoto K. A new bioavailability enhancement strategy of curcumin via self-assembly nano-complexation of curcumin and bovine serum albumin. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 75:25-33. [DOI: 10.1016/j.msec.2017.02.018] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Revised: 12/16/2016] [Accepted: 02/06/2017] [Indexed: 11/30/2022]
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22
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Liu J, Shim YY, Shen J, Wang Y, Reaney MJ. Whey protein isolate and flaxseed ( Linum usitatissimum L.) gum electrostatic coacervates: Turbidity and rheology. Food Hydrocoll 2017. [DOI: 10.1016/j.foodhyd.2016.10.006] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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23
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Oliveira CL, Veiga F, Varela C, Roleira F, Tavares E, Silveira I, Ribeiro AJ. Characterization of polymeric nanoparticles for intravenous delivery: Focus on stability. Colloids Surf B Biointerfaces 2017; 150:326-333. [DOI: 10.1016/j.colsurfb.2016.10.046] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2016] [Revised: 10/18/2016] [Accepted: 10/24/2016] [Indexed: 12/15/2022]
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24
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Li X, Hua Y, Chen Y, Kong X, Zhang C. Two-step complex behavior between Bowman–Birk protease inhibitor and ι -carrageenan: Effect of protein concentration, ionic strength and temperature. Food Hydrocoll 2017. [DOI: 10.1016/j.foodhyd.2016.07.029] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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25
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Kayitmazer AB. Thermodynamics of complex coacervation. Adv Colloid Interface Sci 2017; 239:169-177. [PMID: 27497750 DOI: 10.1016/j.cis.2016.07.006] [Citation(s) in RCA: 99] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Revised: 07/23/2016] [Accepted: 07/25/2016] [Indexed: 11/26/2022]
Abstract
Isothermal titration calorimetry has routinely been used to understand the thermodynamic characteristics of complexation and coacervation. Most commonly, built-in models that assume independent binding sites have been employed in these studies. However, the non-covalent nature of interactions and steric effects accompanying macromolecules require (i) usage of new models such as overlapping binding sites and Satake-Yang's two-state binding models and (ii) reformed interpretations of the data as two-stage structuring. Fitting data with these models, forces driving the interaction of polyelectrolytes with oppositely charged polyelectrolytes, surfactants, and proteins have been identified as electrostatics and/or counterion release with possible contributions from hydrogen bonding and hydrophobic interactions. Additionally, for surfactant-polyelectrolyte coacervation, ITC signals indicated separate regions for formation of polymer-induced micelles and free micelles. Regardless of the type of the coacervation system, thermodynamics of coacervation is affected by the following parameters: pH and ionic strength of the medium, charge density, molecular weight of the polyelectrolyte, concentration, and mixing order of macroions. Lastly, we present a brief comparison between ITC on one hand and surface plasmon resonance or capillary electrophoresis on the other regarding their application in coacervation.
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26
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Wang R, Yan H, Ma W, Li Y. Complex formation between cationic gemini surfactant and sodium carboxymethylcellulose in the absence and presence of organic salt. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2016.09.023] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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27
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Wang C, Cheong FC, Ruffner DB, Zhong X, Ward MD, Grier DG. Holographic characterization of colloidal fractal aggregates. SOFT MATTER 2016; 12:8774-8780. [PMID: 27722566 PMCID: PMC5083160 DOI: 10.1039/c6sm01790h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
In-line holographic microscopy images of micrometer-scale fractal aggregates can be interpreted with an effective-sphere model to obtain each aggregate's size and the population-averaged fractal dimension. We demonstrate this technique experimentally using model fractal clusters of polystyrene nanoparticles and fractal protein aggregates composed of bovine serum albumin and bovine pancreas insulin.
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Affiliation(s)
- Chen Wang
- Department of Physics and Center for Soft Matter Research, New York University, New York, NY 10003, USA.
| | | | | | - Xiao Zhong
- Department of Chemistry and Molecular Design Institute, New York University, New York, NY 10003, USA
| | - Michael D Ward
- Department of Chemistry and Molecular Design Institute, New York University, New York, NY 10003, USA
| | - David G Grier
- Department of Physics and Center for Soft Matter Research, New York University, New York, NY 10003, USA.
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28
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Affiliation(s)
| | - Matthew V. Tirrell
- Institute for Molecular Engineering; The University of Chicago; Chicago IL USA
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29
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Maechling C, Ball V. Exothermic–Endothermic Transition in the Titration of Poly(allylamine chloride) with Sodium Hexametaphoshate Associated with a Change in the Proton Release Regime. J Phys Chem B 2016; 120:4732-41. [DOI: 10.1021/acs.jpcb.6b02709] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Clarisse Maechling
- Faculté
de Pharmacie, Université de Strasbourg, 74 Route du Rhin, 67401 Illkirch Cedex, France
- Unité
Mixte de Recherche, Centre National de La recherche Scientifique, 7200 74 Route du Rhin, 67401 Illkirch Cedex, France
| | - Vincent Ball
- Faculté
de Chirurgie Dentaire, Université de Strasbourg, 8 rue
sainte Elizabeth, 67000 Strasbourg, France
- Unité
Mixte de Recherche, Institut National de la santé et de la Recherche Médicale, 1121 11 rue Humann, 67085 Strasbourg Cedex, France
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30
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Yigit C, Heyda J, Ballauff M, Dzubiella J. Like-charged protein-polyelectrolyte complexation driven by charge patches. J Chem Phys 2016; 143:064905. [PMID: 26277164 DOI: 10.1063/1.4928078] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We study the pair complexation of a single, highly charged polyelectrolyte (PE) chain (of 25 or 50 monomers) with like-charged patchy protein models (CPPMs) by means of implicit-solvent, explicit-salt Langevin dynamics computer simulations. Our previously introduced set of CPPMs embraces well-defined zero-, one-, and two-patched spherical globules each of the same net charge and (nanometer) size with mono- and multipole moments comparable to those of globular proteins with similar size. We observe large binding affinities between the CPPM and the like-charged PE in the tens of the thermal energy, kBT, that are favored by decreasing salt concentration and increasing charge of the patch(es). Our systematic analysis shows a clear correlation between the distance-resolved potentials of mean force, the number of ions released from the PE, and CPPM orientation effects. In particular, we find a novel two-site binding behavior for PEs in the case of two-patched CPPMs, where intermediate metastable complex structures are formed. In order to describe the salt-dependence of the binding affinity for mainly dipolar (one-patched) CPPMs, we introduce a combined counterion-release/Debye-Hückel model that quantitatively captures the essential physics of electrostatic complexation in our systems.
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Affiliation(s)
- Cemil Yigit
- Soft Matter and Functional Materials, Helmholtz-Zentrum Berlin, 14109 Berlin, Germany
| | - Jan Heyda
- Department of Physical Chemistry, University of Chemistry and Technology, Prague, 166 28 Praha 6, Czech Republic
| | - Matthias Ballauff
- Soft Matter and Functional Materials, Helmholtz-Zentrum Berlin, 14109 Berlin, Germany
| | - Joachim Dzubiella
- Soft Matter and Functional Materials, Helmholtz-Zentrum Berlin, 14109 Berlin, Germany
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31
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Al-Qadi S, Alatorre-Meda M, Martin-Pastor M, Taboada P, Remuñán-López C. The role of hyaluronic acid inclusion on the energetics of encapsulation and release of a protein molecule from chitosan-based nanoparticles. Colloids Surf B Biointerfaces 2016; 141:223-232. [DOI: 10.1016/j.colsurfb.2016.01.029] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2015] [Revised: 01/15/2016] [Accepted: 01/17/2016] [Indexed: 10/22/2022]
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32
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Wu FG, Jiang YW, Chen Z, Yu ZW. Folding Behaviors of Protein (Lysozyme) Confined in Polyelectrolyte Complex Micelle. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:3655-3664. [PMID: 27022665 DOI: 10.1021/acs.langmuir.6b00235] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The folding/unfolding behavior of proteins (enzymes) in confined space is important for their properties and functions, but such a behavior remains largely unexplored. In this article, we reported our finding that lysozyme and a double hydrophilic block copolymer, methoxypoly(ethylene glycol)5K-block-poly(l-aspartic acid sodium salt)10 (mPEG(5K)-b-PLD10), can form a polyelectrolyte complex micelle with a particle size of ∼30 nm, as verified by dynamic light scattering and transmission electron microscopy. The unfolding and refolding behaviors of lysozyme molecules in the presence of the copolymer were studied by microcalorimetry and circular dichroism spectroscopy. Upon complex formation with mPEG(5K)-b-PLD10, lysozyme changed from its initial native state to a new partially unfolded state. Compared with its native state, this copolymer-complexed new folding state of lysozyme has different secondary and tertiary structures, a decreased thermostability, and significantly altered unfolding/refolding behaviors. It was found that the native lysozyme exhibited reversible unfolding and refolding upon heating and subsequent cooling, while lysozyme in the new folding state (complexed with the oppositely charged PLD segments of the polymer) could unfold upon heating but could not refold upon subsequent cooling. By employing the heating-cooling-reheating procedure, the prevention of complex formation between lysozyme and polymer due to the salt screening effect was observed, and the resulting uncomplexed lysozyme regained its proper unfolding and refolding abilities upon heating and subsequent cooling. Besides, we also pointed out the important role the length of the PLD segment played during the formation of micelles and the monodispersity of the formed micelles. Furthermore, the lysozyme-mPEG(5K)-b-PLD10 mixtures prepared in this work were all transparent, without the formation of large aggregates or precipitates in solution as frequently observed in other protein-polyelectrolyte systems. Hence, the present protein-PEGylated poly(amino acid) mixture provides an ideal water-soluble model system to study the important role of electrostatic interaction in the complexation between proteins and polymers, leading to important new knowledge on the protein-polymer interactions. Moreover, the polyelectrolyte complex micelle formed between protein and PEGylated polymer may provide a good drug delivery vehicle for therapeutic proteins.
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Affiliation(s)
- Fu-Gen Wu
- Key Laboratory of Bioorganic Phosphorous Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University , Beijing 100084, P. R. China
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University , Nanjing 210096, China
| | - Yao-Wen Jiang
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University , Nanjing 210096, China
| | - Zhan Chen
- Department of Chemistry, University of Michigan , 930 North University Avenue, Ann Arbor, Michigan 48109, United States
| | - Zhi-Wu Yu
- Key Laboratory of Bioorganic Phosphorous Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University , Beijing 100084, P. R. China
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33
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Wang C, Zhong X, Ruffner DB, Stutt A, Philips LA, Ward MD, Grier DG. Holographic Characterization of Protein Aggregates. J Pharm Sci 2016; 105:1074-85. [PMID: 26886303 DOI: 10.1016/j.xphs.2015.12.018] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2015] [Revised: 12/18/2015] [Accepted: 12/18/2015] [Indexed: 11/29/2022]
Abstract
We demonstrate how holographic video microscopy can be used to detect, count, and characterize individual micrometer-scale protein aggregates as they flow down a microfluidic channel in their native buffer. Holographic characterization directly measures the radius and refractive index of subvisible protein aggregates and offers insights into their morphologies. The measurement proceeds fast enough to build up population averages for time-resolved studies and lends itself to tracking trends in protein aggregation arising from changing environmental factors. Information on individual particle's refractive indexes can be used to differentiate protein aggregates from such contaminants as silicone droplets. These capabilities are demonstrated through measurements on samples of bovine pancreas insulin aggregated through centrifugation and of bovine serum albumin aggregated by complexation with a polyelectrolyte. Differentiation is demonstrated with samples that have been spiked with separately characterized silicone spheres. Holographic characterization measurements are compared with results obtained with microflow imaging and dynamic light scattering.
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Affiliation(s)
- Chen Wang
- Department of Physics, Center for Soft Matter Research, New York University, New York, New York 10003
| | - Xiao Zhong
- Department of Chemistry, Molecular Design Institute, New York University, New York, New York 10003
| | | | | | | | - Michael D Ward
- Department of Chemistry, Molecular Design Institute, New York University, New York, New York 10003
| | - David G Grier
- Department of Physics, Center for Soft Matter Research, New York University, New York, New York 10003.
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34
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Wu FG, Jiang YW, Sun HY, Luo JJ, Yu ZW. Complexation of Lysozyme with Sodium Poly(styrenesulfonate) via the Two-State and Non-Two-State Unfoldings of Lysozyme. J Phys Chem B 2015; 119:14382-92. [DOI: 10.1021/acs.jpcb.5b07277] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Fu-Gen Wu
- Key
Laboratory of Bioorganic Phosphorous Chemistry and Chemical Biology
(Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, People’s Republic of China
- State
Key Laboratory of Bioelectronics, School of Biological Science and
Medical Engineering, Southeast University, Nanjing 210096, People’s Republic of China
| | - Yao-Wen Jiang
- State
Key Laboratory of Bioelectronics, School of Biological Science and
Medical Engineering, Southeast University, Nanjing 210096, People’s Republic of China
| | - Hai-Yuan Sun
- Key
Laboratory of Bioorganic Phosphorous Chemistry and Chemical Biology
(Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, People’s Republic of China
| | - Jun-Jie Luo
- Key
Laboratory of Bioorganic Phosphorous Chemistry and Chemical Biology
(Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, People’s Republic of China
| | - Zhi-Wu Yu
- Key
Laboratory of Bioorganic Phosphorous Chemistry and Chemical Biology
(Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, People’s Republic of China
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35
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Asimakopoulos T, Staikos G. Complexation of bovine serum albumin with cationic polyelectrolytes at pH 7.40 – Formation of soluble complexes. Eur Polym J 2015. [DOI: 10.1016/j.eurpolymj.2015.08.022] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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36
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Yu S, Xu X, Yigit C, van der Giet M, Zidek W, Jankowski J, Dzubiella J, Ballauff M. Interaction of human serum albumin with short polyelectrolytes: a study by calorimetry and computer simulations. SOFT MATTER 2015; 11:4630-4639. [PMID: 25959568 DOI: 10.1039/c5sm00687b] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We present a comprehensive study of the interaction of human serum albumin (HSA) with poly(acrylic acid) (PAA; number average degree of polymerization: 25) in aqueous solution. The interaction of HSA with PAA is studied in dilute solution as a function of the concentration of added salt (20-100 mM) and temperature (25-37 °C). Isothermal titration calorimetry (ITC) is used to analyze the interaction and to determine the binding constant and related thermodynamic data. It is found that only one PAA chain is bound per HSA molecule. The free energy of binding ΔGb increases with temperature significantly. ΔGb decreases with increasing salt concentration and is dominated by entropic contributions due to the release of bound counterions. Coarse-grained Langevin computer simulations treating the counterions in an explicit manner are used to study the process of binding in detail. These simulations demonstrate that the PAA chains are bound in the Sudlow II site of HSA. Moreover, ΔGb is calculated from the simulations and found to be in very good agreement with the measured data. The simulations demonstrate clearly that the driving force of binding is the release of counterions in full agreement with the ITC-data.
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Affiliation(s)
- Shun Yu
- Soft Matter and Functional Materials, Helmholtz-Zentrum Berlin, Hahn-Meitner Platz 1, 14109 Berlin, Germany.
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Schaaf P, Schlenoff JB. Saloplastics: processing compact polyelectrolyte complexes. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2015; 27:2420-32. [PMID: 25771881 DOI: 10.1002/adma.201500176] [Citation(s) in RCA: 122] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2015] [Revised: 02/04/2015] [Indexed: 05/04/2023]
Abstract
Polyelectrolyte complexes (PECs) are prepared by mixing solutions of oppositely charged polyelectrolytes. These diffuse, amorphous precipitates may be compacted into dense materials, CoPECs, by ultracentrifugation (ucPECs) or extrusion (exPECs). The presence of salt water is essential in plasticizing PECs to allow them to be reformed and fused. When hydrated, CoPECs are versatile, rugged, biocompatible, elastic materials with applications including bioinspired materials, supports for enzymes and (nano)composites. In this review, various methods for making CoPECs are described, as well as fundamental responses of CoPEC mechanical properties to salt concentration. Possible applications as synthetic cartilage, enzymatically active biocomposites, self-healing materials, and magnetic nanocomposites are presented.
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Affiliation(s)
- Pierre Schaaf
- INSERM, UMR-S 1121, Biomatériaux et Bioingénierie, 11, rue Humann, 67085, Strasbourg Cedex, France; Institut Charles Sadron (UPR22-CNRS), 23, rue du Loess, 67034, Strasbourg, France
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38
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Jeon O, Wolfson DW, Alsberg E. In-situ formation of growth-factor-loaded coacervate microparticle-embedded hydrogels for directing encapsulated stem cell fate. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2015; 27:2216-23. [PMID: 25708428 PMCID: PMC4408272 DOI: 10.1002/adma.201405337] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2014] [Revised: 01/27/2015] [Indexed: 05/26/2023]
Abstract
The spontaneous formation of coacervate microdroplet-laden photo-crosslinked hydrogels derived from the simple mixing of oxidized, methacrylated alginate (OMA) and methacrylated gelatin (GelMA) enables simultaneous creation of drug-laden microdroplets and encapsulation of stem cells in photopolymerized coacervate hydrogels under physiological conditions. This can be utilized as a novel platform for in situ formation of localized, sustained bioactive molecule delivery to encapsulate stem cells for therapeutic applications.
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Affiliation(s)
- Oju Jeon
- Department of Biomedical Engineering, Case Western Reserve University Cleveland, OH 44106, USA
| | - David W. Wolfson
- Department of Biomedical Engineering, Case Western Reserve University Cleveland, OH 44106, USA
| | - Eben Alsberg
- Department of Biomedical Engineering, Case Western Reserve University Cleveland, OH 44106, USA. Department of Orthopaedic Surgery, Case Western Reserve University Cleveland, OH 44106, USA
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Vitorazi L, Ould-Moussa N, Sekar S, Fresnais J, Loh W, Chapel JP, Berret JF. Evidence of a two-step process and pathway dependency in the thermodynamics of poly(diallyldimethylammonium chloride)/poly(sodium acrylate) complexation. SOFT MATTER 2014; 10:9496-9505. [PMID: 25347132 DOI: 10.1039/c4sm01461h] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Recent studies have pointed out the importance of polyelectrolyte assembly in the elaboration of innovative nanomaterials. Beyond their structures, many important questions on the thermodynamics of association remain unanswered. Here, we investigate the complexation between poly(diallyldimethylammonium chloride) (PDADMAC) and poly(sodium acrylate) (PANa) chains using a combination of three techniques: isothermal titration calorimetry (ITC), static and dynamic light scattering and electrophoresis. Upon addition of PDADMAC to PANa or vice-versa, the results obtained by the different techniques agree well with each other, and reveal a two-step process. The primary process is the formation of highly charged polyelectrolyte complexes of size 100 nm. The secondary process is the transition towards a coacervate phase made of rich and poor polymer droplets. The binding isotherms measured are accounted for using a phenomenological model that provides the thermodynamic parameters for each reaction. Small positive enthalpies and large positive entropies consistent with a counterion release scenario are found throughout this study. Furthermore, this work stresses the importance of the underestimated formulation pathway or mixing order in polyelectrolyte complexation.
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Affiliation(s)
- L Vitorazi
- Matière et Systèmes Complexes, UMR 7057 CNRS Université Denis Diderot Paris-VII, Bâtiment Condorcet, 10 rue Alice Domon et Léonie Duquet, 75205 Paris, France.
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Chai C, Lee J, Huang Q. The effect of ionic strength on the rheology of pH-induced bovine serum albumin/κ-carrageenan coacervates. Lebensm Wiss Technol 2014. [DOI: 10.1016/j.lwt.2014.05.024] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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41
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Melnyk A, Wolska L, Namieśnik J. Coacervative extraction as a green technique for sample preparation for the analysis of organic compounds. J Chromatogr A 2014; 1339:1-12. [DOI: 10.1016/j.chroma.2014.02.082] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2013] [Revised: 02/10/2014] [Accepted: 02/26/2014] [Indexed: 11/28/2022]
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Nugraha C, Bora M, Venkatraman SS. Release retardation of model protein on polyelectrolyte-coated PLGA nano- and microparticles. PLoS One 2014; 9:e92393. [PMID: 24647768 PMCID: PMC3960216 DOI: 10.1371/journal.pone.0092393] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2013] [Accepted: 02/21/2014] [Indexed: 01/08/2023] Open
Abstract
PEM capsules have been proposed for vehicles of drug microencapsulation, with the release triggered by pH, salt, magnetic field, or light. When built on another carrier encapsulating drugs, such as nanoparticles, it could provide additional release barrier to the releasing drug, providing further control to drug release. Although liposomes have received considerable attention with PEM coating for sustained drug release, similar results employing PEM built on poly(lactic-co-lycolic acid) (PLGA) particles is scant. In this work, we demonstrate that the build-up pH and polyelectrolyte pairs of PEM affect the release retardation of BSA from PLGA particles. PAH/PSS pair, the most commonly used polyelectrolyte pair, was used in comparison with PLL/DES. In addition, we also demonstrate that the release retardation effect of PEM-coated PLGA particles diminishes as the particle size increases. We attribute this to the diminishing relative thickness of the PEM coating with respect to the size of the particle as the particle size increases, reducing the diffusional resistance of the PEM.
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Affiliation(s)
- Chandra Nugraha
- School of Materials Science & Engineering, Nanyang Technological University, Singapore, Singapore
| | - Meghali Bora
- School of Materials Science & Engineering, Nanyang Technological University, Singapore, Singapore
| | - Subbu S. Venkatraman
- School of Materials Science & Engineering, Nanyang Technological University, Singapore, Singapore
- * E-mail:
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43
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Du X, Dubin PL, Hoagland DA, Sun L. Protein-Selective Coacervation with Hyaluronic Acid. Biomacromolecules 2014; 15:726-34. [DOI: 10.1021/bm500041a] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
| | | | | | - Lianhong Sun
- School
of Life Sciences, University of Science and Technology of China, Hefei, Anhui, People’s Republic of China, 230027
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Robles E, Juárez J, Burboa MG, Gutiérrez LE, Taboada P, Mosquera V, Valdez MA. Properties of insulin-chitosan complexes obtained by an alkylation reaction on chitosan. J Appl Polym Sci 2013. [DOI: 10.1002/app.39999] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Emmanuel Robles
- Departamento de Investigación en Polímeros y Materiales; Universidad de Sonora, Rosales y Transversal; Hermosillo 83000 Sonora México
| | - Josué Juárez
- Departamento de Física; Universidad de Sonora, Rosales y Transversal; Hermosillo 83000 Sonora México
| | - María. G. Burboa
- Departamento de Investigaciones Científicas y Tecnológicas; Universidad de Sonora, Rosales y Transversal; Hermosillo 83000 Sonora México
| | - Luis E. Gutiérrez
- Departamento de Investigaciones Científicas y Tecnológicas; Universidad de Sonora, Rosales y Transversal; Hermosillo 83000 Sonora México
| | - Pablo Taboada
- Laboratorio de Física de Coloides y Polímeros, Grupo de Sistemas Complejos, Departamento de Física de la Materia Condensada, Facultad de Física; Universidad de Santiago de Compostela; Santiago de Compostela 15782 Spain
| | - Víctor Mosquera
- Laboratorio de Física de Coloides y Polímeros, Grupo de Sistemas Complejos, Departamento de Física de la Materia Condensada, Facultad de Física; Universidad de Santiago de Compostela; Santiago de Compostela 15782 Spain
| | - Miguel A. Valdez
- Departamento de Física; Universidad de Sonora, Rosales y Transversal; Hermosillo 83000 Sonora México
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Ferrand A, Eap S, Richert L, Lemoine S, Kalaskar D, Demoustier-Champagne S, Atmani H, Mély Y, Fioretti F, Schlatter G, Kuhn L, Ladam G, Benkirane-Jessel N. Osteogenetic properties of electrospun nanofibrous PCL scaffolds equipped with chitosan-based nanoreservoirs of growth factors. Macromol Biosci 2013; 14:45-55. [PMID: 23956214 DOI: 10.1002/mabi.201300283] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2013] [Revised: 07/11/2013] [Indexed: 01/27/2023]
Abstract
Bioactive implants intended for rapid, robust, and durable bone tissue regeneration are presented. The implants are based on nanofibrous 3D-scaffolds of bioresorbable poly-ϵ-caprolactone mimicking the fibrillar architecture of bone matrix. Layer-by-layer nanoimmobilization of the growth factor BMP-2 in association with chitosan (CHI) or poly-L-lysine over the nanofibers is described. The osteogenetic potential of the scaffolds coated with layers of CHI and BMP-2 is demonstrated in vitro, and in vivo in mouse calvaria, through enhanced osteopontin gene expression and calcium phosphate biomineralization. The therapeutic strategy described here contributes to the field of regenerative medicine, as it proposes a route toward efficient repair of bone defects at reduced risk and cost level.
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Affiliation(s)
- Alice Ferrand
- INSERM UMR 1109, Osteoarticular and Dental Regenerative Nanomedicine, 11 rue Humann, 67085, Strasbourg Cedex, France; Institut de Chimie et Procédés pour l'Énergie, l'Environnement et la Santé, ICPEES-UMR 7515, Université de Strasbourg, CNRS, Institut Carnot MICA, École Européenne de Chimie, Polymères et Matériaux, 25 rue Becquerel, 67087, Strasbourg, cedex 2, France
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Han Y, Wang W, Tang Y, Zhang S, Li Z, Wang Y. Coassembly of poly(ethylene glycol)-block-poly(glutamate sodium) and gemini surfactants with different spacer lengths. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:9316-9323. [PMID: 23834076 DOI: 10.1021/la4019713] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The coassembly of poly(ethylene glycol)-b-poly(glutamate sodium) copolymer (PEG113-PGlu100) with cationic gemini surfactants alkanediyl-α,ω-bis-(dodecyldimethylammonium bromide) [C12H25(CH3)2N(CH2)SN(CH3)2C12H25]Br2 (designated as C12CSC12Br2, S = 3, 6, and 12) have been studied by isothermal titration microcalorimetry, cryogenic transmission electron microscopy, circular dichroism, small-angle X-ray scattering, zeta potential, and size measurement. It has been shown that the electrostatic interaction of C12CSC12Br2 with the anionic carboxylate groups of PEG113-PGlu100 leads to complexation, and the C12CSC12Br2/PEG113-PGlu100 complexes are soluble even at the electroneutral point. The complexes display the feature of superamphiphiles and assemble into ordered nanosheets with a sandwich-like packing. The gemini molecules which were already bound with PGlu chains associate through hydrophobic interaction and constitute the middle part of the nanosheets, whereas the top and bottom of the nanosheets are hydrophilic PEG chains. The size and morphology of the nanosheets are affected by the spacer length of the gemini surfactants. The average sizes of the aggregates at the electroneutral point are 81, 68, and 90 nm for C12C3C12Br2/PEG113-PGlu100, C12C6C12Br2/PEG113-PGlu100, and C12C12C12Br2/PEG113-PGlu100, respectively. Both C12C3C12Br2/PEG113-PGlu100 and C12C12C12Br2/PEG113-PGlu100 mainly generate hexagonal nanosheets, while the C12C6C12Br2/PEG113-PGlu100 system only induces round nanosheets.
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Affiliation(s)
- Yuchun Han
- Beijing National Laboratory of Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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Antonov Y, Zhuravleva I. Effect of protein thermo aggregation on the binding of BSA to gelatin type A. Int J Biol Macromol 2013. [DOI: 10.1016/j.ijbiomac.2012.11.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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48
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Bouhallab S, Croguennec T. Spontaneous Assembly and Induced Aggregation of Food Proteins. ADVANCES IN POLYMER SCIENCE 2013. [DOI: 10.1007/12_2012_201] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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49
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Robles E, Villar E, Alatorre-Meda M, Burboa MG, Valdez MA, Taboada P, Mosquera V. Effects of the hydrophobization on chitosan-insulin nanoparticles obtained by an alkylation reaction on chitosan. J Appl Polym Sci 2012. [DOI: 10.1002/app.38870] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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50
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Aimé C, Mosser G, Pembouong G, Bouteiller L, Coradin T. Controlling the nano-bio interface to build collagen-silica self-assembled networks. NANOSCALE 2012; 4:7127-7134. [PMID: 23070474 DOI: 10.1039/c2nr31901b] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Bio-hybrid networks are designed based on the self-assembly of surface-engineered collagen-silica nanoparticles. Collagen triple helices can be confined on the surface of sulfonate-modified silica particles in a controlled manner. This gives rise to hybrid building blocks with well-defined diameters and surface potentials. Taking advantage of the self-assembling properties of collagen, collagen-silica networks are further built-up in solution. The structural and specific recognition properties of the collagen fibrils are well-preserved within the hybrid assembly. A combination of calorimetry, dynamic light scattering, zetametry and microscopy studies indicates that network formation occurs via a surface-mediated mechanism where pre-organization of the protein chains on the particle surface favors the fibrillogenesis process. These results enlighten the importance of the nano-bio interface on the formation and properties of self-assembled bionanocomposites.
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Affiliation(s)
- Carole Aimé
- UPMC Univ Paris 06, CNRS, Chimie de la Matière Condensée de Paris Collège de France, 11 place Marcelin Berthelot, F-75005 Paris, France.
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