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Zhuravleva IL, Bezrodnykh EA, Berezin BB, Tikhonov VE, Antonov YA. Effect of Soft Preheating of Bovine Serum Albumin on the Complexation with Oligochitosan: Structure and Conformation of BSA in the Complex. Macromol Biosci 2023; 23:e2300088. [PMID: 37268604 DOI: 10.1002/mabi.202300088] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 05/25/2023] [Indexed: 06/04/2023]
Abstract
Phase analysis, spectroscopic, and light scattering methods are applied to investigate the peculiarities of the interaction of oligochitosan (OCHI) with native and preheated bovine serum albumin (BSA) as well as the conformational and structural changes of BSA in BSA/OCHI complex. As shown, untreated BSA binds with OCHI mainly forming soluble electrostatic nanocomplexes, with the binding causing an increase in BSA helicity without a change in the local tertiary structure and thermal stability of BSA. In contrast, soft preheating at 56 °C enhances the complexation of BSA with OCHI and slightly destabilizes the secondary and local tertiary structures of BSA within the complex particles. Preheating at 64 °C (below the irreversible stage of BSA thermodenaturation) leads to further enhancement in the complexation and formation of insoluble complexes stabilized by both Coulomb forces and hydrophobic interactions. The finding can be promising for the preparation of biodegradable BSA/chitosan-based drug delivery systems.
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Affiliation(s)
- Irina L Zhuravleva
- N.M. Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, Moscow, 119334, Russia
| | - Evgeniya A Bezrodnykh
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow, 119334, Russia
| | - Boris B Berezin
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow, 119334, Russia
| | - Vladimir E Tikhonov
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow, 119334, Russia
| | - Yurij A Antonov
- N.M. Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, Moscow, 119334, Russia
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2
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Sathesh V, Chen JK, Chang CJ, Aimi J, Chen ZC, Hsu YC, Huang YS, Huang CF. Synthesis of Poly(ε-caprolactone)-Based Miktoarm Star Copolymers through ROP, SA ATRC, and ATRP. Polymers (Basel) 2018; 10:E858. [PMID: 30960783 PMCID: PMC6403792 DOI: 10.3390/polym10080858] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2018] [Revised: 07/27/2018] [Accepted: 07/30/2018] [Indexed: 11/28/2022] Open
Abstract
The synthesis of novel branched/star copolymers which possess unique physical properties is highly desirable. Herein, a novel strategy was demonstrated to synthesize poly(ε-caprolactone) (PCL) based miktoarm star (μ-star) copolymers by combining ring-opening polymerization (ROP), styrenics-assisted atom transfer radical coupling (SA ATRC), and atom transfer radical polymerization (ATRP). From the analyses of gel permeation chromatography (GPC), proton nuclear magnetic resonance (¹H NMR), and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS), well-defined PCL-μ-PSt (PSt: polystyrene), and PCL-μ-PtBA (PtBA: poly(tert-butyl acrylate) μ-star copolymers were successfully obtained. By using atomic force microscopy (AFM), interestingly, our preliminary examinations of the μ-star copolymers showed a spherical structure with diameters of ca. 250 and 45 nm, respectively. We successfully employed combinations of synthetic techniques including ROP, SA ATRC, and ATRP with high effectiveness to synthesize PCL-based μ-star copolymers.
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Affiliation(s)
- Venkatesan Sathesh
- Department of Chemical Engineering, National Chung Hsing University, 145 Xingda Road, South District, Taichung 40227, Taiwan.
| | - Jem-Kun Chen
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, 43 Sec. 4, Keelung Road, Taipei 10607, Taiwan.
| | - Chi-Jung Chang
- Department of Chemical Engineering, Feng Chia University, 100 Wenhwa Road, Seatwen District, Taichung 40724, Taiwan.
| | - Junko Aimi
- Molecular Design & Function Group, Research Center for Functional Materials, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan.
| | - Zong-Cheng Chen
- Department of Chemical Engineering, National Chung Hsing University, 145 Xingda Road, South District, Taichung 40227, Taiwan.
| | - Yu-Chih Hsu
- Department of Chemical Engineering, National Chung Hsing University, 145 Xingda Road, South District, Taichung 40227, Taiwan.
| | - Yi-Shen Huang
- Department of Chemical Engineering, National Chung Hsing University, 145 Xingda Road, South District, Taichung 40227, Taiwan.
| | - Chih-Feng Huang
- Department of Chemical Engineering, National Chung Hsing University, 145 Xingda Road, South District, Taichung 40227, Taiwan.
- Research Center for Sustainable Energy and Nanotechnology, National Chung Hsing University, 145 Xingda Road, South District, Taichung 40227, Taiwan.
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3
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Ramirez R, Woodcock J, Kilbey SM. ARGET-ATRP synthesis and swelling response of compositionally varied poly(methacrylic acid-co-N,N-diethylaminoethyl methacrylate) polyampholyte brushes. SOFT MATTER 2018; 14:6290-6302. [PMID: 30014055 DOI: 10.1039/c8sm00882e] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Modifying the composition of polyampholytes, which are comprised of charge-positive and charge-negative repeat units, directly contributes to trade-offs between charge and structure, which are externally regulated by solution pH and added salt. Here, the relative ratio of anionic and cationic comonomers is varied to tailor the stimuli-responsiveness of poly(methacrylic acid-co-N,N-diethylaminoethyl methacrylate) (P(MAA-co-DEAEMA)) brushes to changes in solution pH and an added zwitterion. These systems display a strong dependence on excess repeating units of either type and the random incorporation appears to facilitate self-neutralization of charges. Pseudo-living growth with smooth comonomer incorporation is achieved using activators regenerated by electron transfer atom transfer radical polymerization (ARGET ATRP), creating well-defined brushes. In situ ellipsometry measurements of solvated brush thickness indicate that at low and high pH, the brushes display polyelectrolyte behavior with a strong compositional dependence, but at intermediate pH values, the brushes show the characteristic collapse attributed to self-neutralization of polyampholytes. The polyampholyte brushes maintain these patterns of behavior across all compositions and in the presence of an added zwitterion, which contributes additional hydrophobic character as evidenced by decreases in the swollen layer thicknesses. The response of the P(MAA-co-DEAEMA) brushes to the organic osmolyte betaine is consistent with its tendency to stabilize proteins and peptides in a kosmotropic fashion. These studies add perspective to efforts to manipulate sequence in polyampholytic polymers, support broader efforts to tailor interfacial soft films for applications in biotechnology and sensing, and understand aggregation and stability of biological polymers.
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Affiliation(s)
- Rachel Ramirez
- Department of Chemistry, University of Tennessee Knoxville, Tennessee 37996, USA.
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Riley JK, Tilton RD. Sequential Adsorption of Nanoparticulate Polymer Brushes as a Strategy To Control Adhesion and Friction. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:11440-11447. [PMID: 27734683 DOI: 10.1021/acs.langmuir.6b02963] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
This work investigates surface forces that result from adsorbed layers of silica nanoparticles with grafted pH-responsive, cationic poly(2-(dimethylamino)ethyl methacrylate) brushes (SiO2-g-PDMAEMA) and how adhesive bridging forces can be suppressed and friction forces reduced by "backfilling" these heterogeneous adsorbed layers with nonionic poly(ethylene oxide) star copolymers (Star PEO45MA). Adsorption of SiO2-g-PDMAEMA and Star PEO45MA to silica is measured as a function of pH by quartz crystal microbalance with dissipation (QCM-D) in order to evaluate the electrostatically driven adsorption of SiO2-g-PDMAEMA and hydrogen-bonding-driven adsorption of Star PEO45MA. Force measurements performed using colloidal probe force microscopy show the strong role that limited surface coverage plays in adhesive bridging forces between silica with adsorbed SiO2-g-PDMAEMA, while Star PEO45MA adsorption produces purely repulsive steric interactions. Bridging between SiO2-g-PDMAEMA-coated surfaces produces frictional forces that tend to be larger than those acting between bare surfaces at similar normal loads, while friction is consistently decreased by Star PEO45MA adsorption. Sequential adsorption of SiO2-g-PDMAEMA and Star PEO45MA generates high-coverage mixed nanoparticulate brush layers with uniformly repulsive normal forces and reduced friction forces. Adsorption and force measurements reveal that Star PEO45MA not only adsorbs to silica but also binds to SiO2-g-PDMAEMA. The latter allows sequential adsorption of the two components to produce mixed multilayers. The mixed SiO2-g-PDMAEMA/Star PEO45MA multilayers exhibit larger layer thicknesses, no bridging, and sustained smooth friction, highlighting their potential usefulness as aqueous boundary lubricant layers.
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Affiliation(s)
- John K Riley
- Center for Complex Fluids Engineering, ‡Department of Chemical Engineering, and §Department of Biomedical Engineering, Carnegie Mellon University , Pittsburgh, Pennsylvania 15213, United States
| | - Robert D Tilton
- Center for Complex Fluids Engineering, ‡Department of Chemical Engineering, and §Department of Biomedical Engineering, Carnegie Mellon University , Pittsburgh, Pennsylvania 15213, United States
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Davis JL, Wang X, Bornani K, Hinestrosa JP, Mays JW, Kilbey SM. Solution Properties of Architecturally Complex Multiarm Star Diblock Copolymers in a Nonselective and Selective Solvent for the Inner Block. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b00024] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jesse L. Davis
- Department of Chemistry and ‡Department of
Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Xu Wang
- Department of Chemistry and ‡Department of
Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Kamlesh Bornani
- Department of Chemistry and ‡Department of
Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Juan Pablo Hinestrosa
- Department of Chemistry and ‡Department of
Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Jimmy W. Mays
- Department of Chemistry and ‡Department of
Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - S. Michael Kilbey
- Department of Chemistry and ‡Department of
Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
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6
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Growney DJ, Mykhaylyk OO, Derouineau T, Fielding LA, Smith AJ, Aragrag N, Lamb GD, Armes SP. Star Diblock Copolymer Concentration Dictates the Degree of Dispersion of Carbon Black Particles in Nonpolar Media: Bridging Flocculation versus Steric Stabilization. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b00517] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- David J. Growney
- Department
of Chemistry, University of Sheffield, Brook Hill, Sheffield, South
Yorkshire S3 7HF, U.K
| | - Oleksandr O. Mykhaylyk
- Department
of Chemistry, University of Sheffield, Brook Hill, Sheffield, South
Yorkshire S3 7HF, U.K
| | - Thibault Derouineau
- Department
of Chemistry, University of Sheffield, Brook Hill, Sheffield, South
Yorkshire S3 7HF, U.K
| | - Lee A. Fielding
- Department
of Chemistry, University of Sheffield, Brook Hill, Sheffield, South
Yorkshire S3 7HF, U.K
| | - Andrew J. Smith
- Diamond Light Source Ltd., Diamond House, Harwell
Science and Innovation Campus, Didcot, Oxfordshire OX11 0DE, U.K
| | - Najib Aragrag
- BP Formulated Products
Technology, Technology Centre, Whitchurch Hill, Pangbourne RG8 7QR, U.K
| | - Gordon D. Lamb
- BP Formulated Products
Technology, Technology Centre, Whitchurch Hill, Pangbourne RG8 7QR, U.K
| | - Steven P. Armes
- Department
of Chemistry, University of Sheffield, Brook Hill, Sheffield, South
Yorkshire S3 7HF, U.K
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Polymeropoulos G, Moschovas D, Kati A, Karanastasis A, Pelekanou S, Christakopoulos P, Sakellariou G, Avgeropoulos A. Synthesis via ATRP, kinetics study and characterization (molecular-morphological) of 3-Arm star diblock copolymers of the (PS-b-P2VP)3type. ACTA ACUST UNITED AC 2014. [DOI: 10.1002/pola.27432] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- George Polymeropoulos
- Department of Materials Science Engineering; University of Ioannina, University Campus-Dourouti; 45110 Ioannina Greece
| | - Dimitrios Moschovas
- Department of Materials Science Engineering; University of Ioannina, University Campus-Dourouti; 45110 Ioannina Greece
| | - Anastasia Kati
- Department of Materials Science Engineering; University of Ioannina, University Campus-Dourouti; 45110 Ioannina Greece
| | - Apostolos Karanastasis
- Department of Materials Science Engineering; University of Ioannina, University Campus-Dourouti; 45110 Ioannina Greece
| | - Styliani Pelekanou
- Department of Materials Science Engineering; University of Ioannina, University Campus-Dourouti; 45110 Ioannina Greece
| | | | - Georgios Sakellariou
- Department of Chemistry; University of Athens, Panepistimiopolis; Zografou 15771 Athens Greece
| | - Apostolos Avgeropoulos
- Department of Materials Science Engineering; University of Ioannina, University Campus-Dourouti; 45110 Ioannina Greece
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