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Kumar A, Bakli C, Chakraborty S. Ion-Solvent Interactions under Confinement Hold the Key to Tuning the DNA Translocation Speeds in Polyelectrolyte-Functionalized Nanopores. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:7300-7309. [PMID: 38536237 DOI: 10.1021/acs.langmuir.3c02816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/10/2024]
Abstract
DNA sequencing and sensing using nanopore technology delves critically into the alterations in the measurable electrical signal as single-stranded DNA is drawn through a tiny passage. To make such precise measurements, however, slowing down the DNA in the tightly confined passage is a key requirement, which may be achieved by grafting the nanopore walls with a polyelectrolyte layer (PEL). This soft functional layer at the wall, under an off-design condition, however, may block the DNA passage completely, leading to the complete loss of output signal from the nanobio sensor. Whereas theoretical postulates have previously been put forward to explain the essential physics of DNA translocation in nanopores, these have turned out to be somewhat inadequate when confronted with the experimental findings on functionalized nanopores, including the prediction of the events of complete signal losses. Circumventing these constraints, herein we bring out a possible decisive role of the interplay between the inevitable variabilities in the ionic distribution along the nanopore axis due to its finite length as opposed to its idealized "infinite" limit as well as the differential permittivity of PEL and bulk solution that cannot be captured by the commonly used one-dimensional variant of the electrical double layer theory. Our analysis, for the first time, captures variations in the ionic concentration distribution across multidimensional physical space and delineates its impact on the DNA translocation characteristics that have hitherto remained unaddressed. Our results reveal possible complete blockages of DNA translocation as influenced by less-than-threshold permittivity values or greater-than-threshold grafting densities of the PEL. In addition, electrohydrodynamic blocking is witnessed due to the ion-selective nature of the nanopore at low ionic concentrations. Hence, our study establishes a functionally active regime over which the PEL layer in a finite-length nanopore facilitates controllable DNA translocation, enabling successful sequencing and sensing through the explicit modulation of translocation speed.
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Affiliation(s)
- Avinash Kumar
- Thermofluidics and Nanotechnology for Sustainable Energy Systems Laboratory, School of Energy Science and Engineering, Indian Institute of Technology Kharagpur, Kharagpur-721302, India
| | - Chirodeep Bakli
- Thermofluidics and Nanotechnology for Sustainable Energy Systems Laboratory, School of Energy Science and Engineering, Indian Institute of Technology Kharagpur, Kharagpur-721302, India
| | - Suman Chakraborty
- Department of Mechanical Engineering, Indian Institute of Technology Kharagpur, Kharagpur-721302, India
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Javan Nikkhah S, Sammalkorpi M. Single core and multicore aggregates from a polymer mixture: A dissipative particle dynamics study. J Colloid Interface Sci 2023; 635:231-241. [PMID: 36587575 DOI: 10.1016/j.jcis.2022.12.119] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 12/04/2022] [Accepted: 12/20/2022] [Indexed: 12/24/2022]
Abstract
HYPOTHESIS Multicore block copolymer aggregates correspond to self-assembly such that the polymer system spontaneously phase separates to multiple, droplet-like cores differing in the composition from the polymer surroundings. Such multiple core aggregates are highly useful capsules for different applications, e.g., drug transport, catalysis, controlled solvation, and chemical reactions platforms. We postulate that polymer system composition provides a direct means for designing polymer systems that self-assemble to such morphologies and controlling the assembly response. SIMULATIONS Using dissipative particle dynamics (DPD) simulations, we examine the self-assembly of a mixture of highly and weakly solvophobic homopolymers and an amphiphilic block copolymer in the presence of solvent. We map the multicore vs single core (core-shell particles) assembly response and aggregate structure in terms of block copolymer concentration, polymer component ratios, and chain length of the weakly solvophobic homopolymer. FINDINGS For fixed components and polymer chemistries, the amount of block copolymer is the key to controlling single core vs multicore aggregation. We find a polymer system dependent critical copolymer concentration for the multicore aggregation and that a minimum level of incompatibility between the solvent and the weakly solvophobic component is required for multicore assembly. We discuss the implications for polymer system design for multicore assemblies. In summary, the study presents guidelines to produce multicore aggregates and to tune the assembly from multicore aggregation to single core core-shell particles.
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Affiliation(s)
- Sousa Javan Nikkhah
- Department of Chemistry and Materials Science, School of Chemical Engineering, Aalto University, P.O. Box 16100, FI-00076 Aalto, Finland; Department of Physics, Bernal Institute, University of Limerick, V94 T9PX Limerick, Ireland; Department of Chemical Sciences, Bernal Institute, University of Limerick, V94 T9PX Limerick, Ireland.
| | - Maria Sammalkorpi
- Department of Chemistry and Materials Science, School of Chemical Engineering, Aalto University, P.O. Box 16100, FI-00076 Aalto, Finland; Department of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, P.O. Box 16100, FI-00076 Aalto, Finland; Academy of Finland Center of Excellence in Life-Inspired Hybrid Materials (LIBER), Aalto University, P.O. Box 16100, FI-00076 Aalto, Finland.
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Budpud K, Okeyoshi K, Okajima MK, Kaneko T. Cyanobacterial supra‐polysaccharide: Self‐similar hierarchy, diverse morphology, and application prospects of sacran fibers. Biopolymers 2022; 113:e23522. [DOI: 10.1002/bip.23522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Revised: 07/01/2022] [Accepted: 07/05/2022] [Indexed: 11/09/2022]
Affiliation(s)
- Kulisara Budpud
- Graduate School of Advanced Science and Technology Japan Advanced Institute of Science and Technology Nomi Ishikawa Japan
| | - Kosuke Okeyoshi
- Graduate School of Advanced Science and Technology Japan Advanced Institute of Science and Technology Nomi Ishikawa Japan
| | - Maiko K. Okajima
- Graduate School of Advanced Science and Technology Japan Advanced Institute of Science and Technology Nomi Ishikawa Japan
| | - Tatsuo Kaneko
- Graduate School of Advanced Science and Technology Japan Advanced Institute of Science and Technology Nomi Ishikawa Japan
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Soni R, Hsu Y, Asoh T, Uyama H. Cellulose nanofiber reinforced starch film with rapid disintegration in marine environments. J Appl Polym Sci 2022. [DOI: 10.1002/app.52776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Raghav Soni
- Department of Applied Chemistry, Graduate School of Engineering Osaka University Osaka Japan
| | - Yu‐I Hsu
- Department of Applied Chemistry, Graduate School of Engineering Osaka University Osaka Japan
| | - Taka‐Aki Asoh
- Department of Applied Chemistry, Graduate School of Engineering Osaka University Osaka Japan
| | - Hiroshi Uyama
- Department of Applied Chemistry, Graduate School of Engineering Osaka University Osaka Japan
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Choudhuri K, Bastian JD, Berger JT, de Silva UK, Lapitsky Y. Preparation of polyelectrolyte complex nanoparticles with tunable and narrow size distributions by template polymerization. Colloid Polym Sci 2022. [DOI: 10.1007/s00396-022-04969-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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6
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Protein-like particles through nanoprecipitation of mixtures of polymers of opposite charge. J Colloid Interface Sci 2021; 607:1786-1795. [PMID: 34600342 DOI: 10.1016/j.jcis.2021.09.080] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 09/14/2021] [Accepted: 09/15/2021] [Indexed: 11/23/2022]
Abstract
HYPOTHESIS Polymer nanoparticles (NPs) have a very high potential for applications notably in the biomedical field. However, synthetic polymer NPs cannot yet concurrence the functionalities of proteins, their natural counterparts, notably in terms of size, control over internal structure and interactions with biological environments. We hypothesize that kinetic trapping of polymers bearing oppositely charged groups in NPs could bring a new level of control and allow mimicking the surfaces of proteins. EXPERIMENTS Here, the assembly of mixed-charge polymer NPs through nanoprecipitation of mixtures of oppositely charged polymers is studied. Two series of copolymers made of ethyl methacrylate and 1 to 25 mol% of either methacrylic acid or a trimethylammonium bearing methacrylate are synthesized. These carboxylic acid or trimethylammonium bearing polymers are then mixed in different ratios and nanoprecipitated. The influence of the charge fraction, mixing ratio of the polymers, and precipitation conditions on NP size and surface charge is studied. FINDINGS Using this approach, NPs of less than 25 nm with tunable surface charge from +40 mV to -40 mV are assembled. The resulting NPs are sensitive to pH and certain NP formulations have an isoelectric point allowing repeated charge reversal. Encapsulation of fluorescent dyes yields very bright fluorescent NPs, whose interactions with cells are studied through fluorescence microscopy. The obtained results show the potential of nanoprecipitation of oppositely charged polymers for the design of NPs with precisely tuned surface properties.
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Khalid A, Ahmed N, Qindeel M, Asad MI, Khan GM, Ur Rehman A. Development of novel biopolymer-based nanoparticles loaded cream for potential treatment of topical fungal infections. Drug Dev Ind Pharm 2021; 47:1090-1099. [PMID: 34279160 DOI: 10.1080/03639045.2021.1957914] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
OBJECTIVE Biodegradable polymers are extensively used due to their efficient safety profiles. The aim of the current study was to fabricate, evaluate, and characterize biodegradable, biocompatible fluconazole (FLZ) loaded chitosan (CHS) chondroitin sulfate (CS) nanoparticles (NPs) for topical delivery. Polymers utilized in the formulation not only served as a carrier system but also aided in fighting with complex etiology of the disease due to their innate antifungal activities. METHODS NPs were prepared by the complex coacervation method, then were optimized for various parameters and subsequently loaded into a cream. RESULTS Scanning electron microscopic (SEM) analysis showed spherical morphology of the NPs. Prepared NPs showed an average particle size in the range of 350-450 nm and an encapsulation efficiency (EE) of 86%. The polydispersity index (PDI) was found to be 0.148 that showed a uniform distribution of NPs. Fourier transform infrared (FTIR) spectroscopy confirmed the absence of any electrostatic interaction between ingredients. In vitro drug release analyses exhibited a sustained release of the drug and higher antifungal activity than free FLZ. Ex vivo permeability and drug distribution in different skin layers ensured a site-specific delivery of the FLZ-NPs. As compared with free FLZ and other control groups, the prepared NPs also exhibited significantly higher antifungal activity against Candida albicans (p < .01). CONCLUSION It was concluded from the results that the FLZ-NPs laden cream could be a potential candidate for topical and site-specific delivery of the drug cargo for the potential treatment of fungal infections.
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Affiliation(s)
- Aimen Khalid
- Department of Pharmacy, Quaid-i-Azam University, Islamabad, Pakistan
| | - Naveed Ahmed
- Department of Pharmacy, Quaid-i-Azam University, Islamabad, Pakistan
| | - Maimoona Qindeel
- Department of Pharmacy, Quaid-i-Azam University, Islamabad, Pakistan
| | | | - Gul Majid Khan
- Department of Pharmacy, Quaid-i-Azam University, Islamabad, Pakistan
| | - Asim Ur Rehman
- Department of Pharmacy, Quaid-i-Azam University, Islamabad, Pakistan
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Glagoleva AA, Larin DE, Vasilevskaya VV. Unusual Structures of Interpolyelectrolyte Complexes: Vesicles and Perforated Vesicles. Polymers (Basel) 2020; 12:E871. [PMID: 32290145 PMCID: PMC7240553 DOI: 10.3390/polym12040871] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Revised: 04/03/2020] [Accepted: 04/04/2020] [Indexed: 12/29/2022] Open
Abstract
By means of computer simulation and analytical theory, we first demonstrated that the interpolyelectrolyte complexes in dilute solution can spontaneously form hollow spherical particles with thin continuous shells (vesicles) or with porous shells (perforated vesicles) if the polyions forming the complex differ in their affinity for the solvent. The solvent was considered good for the nonionic groups of one macroion and its quality was varied for the nonionic groups of the other macroion. It was found that if the electrostatic interactions are weak compared to the attraction induced by the hydrophobicity of the monomer units, the complex in poor solvent tends to form "dense core-loose shell" structures of different shapes. The strong electrostatic interactions favor the formation of the layered, the hollow, and the filled structured morphologies with the strongly segregated macroions. Vesicles with perforated walls were distinguished as the intermediate between the vesicular and the structured solid morphologies. The order parameter based on the spherical harmonics expansion was introduced to calculate the pore distribution in the perforated vesicles depending on the solvent quality. The conditions of the core-shell and hollow vesicular-like morphologies formation were determined theoretically via the calculations of their free energy. The results of the simulation and theoretical approaches are in good agreement.
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Affiliation(s)
| | | | - V. V. Vasilevskaya
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow 119991, Russia; (A.A.G.); (D.E.L.)
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Reis B, Vehlow D, Rust T, Kuckling D, Müller M. Thermoresponsive Catechol Based-Polyelectrolyte Complex Coatings for Controlled Release of Bortezomib. Int J Mol Sci 2019; 20:ijms20236081. [PMID: 31810352 PMCID: PMC6928965 DOI: 10.3390/ijms20236081] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 11/27/2019] [Accepted: 11/29/2019] [Indexed: 12/29/2022] Open
Abstract
To overcome the high relapse rate of multiple myeloma (MM), a drug delivery coating for functionalization of bone substitution materials (BSM) is reported based on adhesive, catechol-containing and stimuli-responsive polyelectrolyte complexes (PECs). This system is designed to deliver the MM drug bortezomib (BZM) directly to the anatomical site of action. To establish a gradual BZM release, the naturally occurring caffeic acid (CA) is coupled oxidatively to form poly(caffeic acid) (PCA), which is used as a polyanion for complexation. The catechol functionalities within the PCA are particularly suitable to form esters with the boronic acid group of the BZM, which are then cleaved in the body fluid to administer the drug. To achieve a more thorough control of the release, the thermoresponsive poly(N-isoproplyacrylamide-co-dimethylaminoethylmethacrylate) (P(NIPAM-co-DMAEMA)) was used as a polycation. Using turbidity measurements, it was proven that the lower critical solution temperature (LCST) character of this polymer was transferred to the PECs. Further special temperature dependent attenuated total reflection infrared spectroscopy (ATR-FTIR) showed that coatings formed by PEC immobilization exhibit a similar thermoresponsive performance. By loading the coatings with BZM and studying the release in a model system, via UV/Vis it was observed, that both aims, the retardation and the stimuli control of the release, were achieved.
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Affiliation(s)
- Berthold Reis
- Leibniz-Institut für Polymerforschung Dresden e.V., Department Polyelectrolytes and Dispersions, Hohe Straße 6, 01069 Dresden, Germany; (B.R.); (D.V.)
- Technische Universität Dresden, Department of Chemistry and Food Chemistry, 01062 Dresden, Germany
| | - David Vehlow
- Leibniz-Institut für Polymerforschung Dresden e.V., Department Polyelectrolytes and Dispersions, Hohe Straße 6, 01069 Dresden, Germany; (B.R.); (D.V.)
- Technische Universität Dresden, Department of Chemistry and Food Chemistry, 01062 Dresden, Germany
| | - Tarik Rust
- Universität Paderborn, Department of Chemistry, Warburger Str. 100, 33106 Paderborn, Germany; (T.R.); (D.K.)
| | - Dirk Kuckling
- Universität Paderborn, Department of Chemistry, Warburger Str. 100, 33106 Paderborn, Germany; (T.R.); (D.K.)
| | - Martin Müller
- Leibniz-Institut für Polymerforschung Dresden e.V., Department Polyelectrolytes and Dispersions, Hohe Straße 6, 01069 Dresden, Germany; (B.R.); (D.V.)
- Technische Universität Dresden, Department of Chemistry and Food Chemistry, 01062 Dresden, Germany
- Correspondence: ; Tel.: +49-351-4658-705
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Tong Z, Liu X, Zhang B. Synthesis of sphere-like polyelectrolyte complexes and their homogeneous membranes for enhanced pervaporation performances in ethanol dehydration. J Memb Sci 2019. [DOI: 10.1016/j.memsci.2019.01.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Wang P, Kankala RK, Chen B, Long R, Cai D, Liu Y, Wang S. Poly‐allylamine hydrochloride and fucoidan‐based self‐assembled polyelectrolyte complex nanoparticles for cancer therapeutics. J Biomed Mater Res A 2018; 107:339-347. [DOI: 10.1002/jbm.a.36526] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Revised: 08/01/2018] [Accepted: 08/14/2018] [Indexed: 12/22/2022]
Affiliation(s)
- Pei Wang
- College of Materials Science and EngineeringHuaqiao University Xiamen Fujian 361021 People's Republic of China
| | - Ranjith Kumar Kankala
- College of Chemical EngineeringHuaqiao University Xiamen Fujian 361021 People's Republic of China
- Fujian Provincial Key Laboratory of Biochemical Technology Xiamen Fujian 361021 People's Republic of China
| | - Biaoqi Chen
- College of Chemical EngineeringHuaqiao University Xiamen Fujian 361021 People's Republic of China
| | - Ruimin Long
- College of Chemical EngineeringHuaqiao University Xiamen Fujian 361021 People's Republic of China
| | - Duanhua Cai
- College of Chemical EngineeringHuaqiao University Xiamen Fujian 361021 People's Republic of China
| | - Yuangang Liu
- College of Chemical EngineeringHuaqiao University Xiamen Fujian 361021 People's Republic of China
- Institute of Pharmaceutical EngineeringHuaqiao University Xiamen Fujian 361021 People's Republic of China
- Fujian Provincial Key Laboratory of Biochemical Technology Xiamen Fujian 361021 People's Republic of China
| | - Shibin Wang
- College of Materials Science and EngineeringHuaqiao University Xiamen Fujian 361021 People's Republic of China
- Fujian Provincial Key Laboratory of Biochemical Technology Xiamen Fujian 361021 People's Republic of China
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Müller M, Urban B, Schwarz S. Biorelated Polyelectrolyte Coatings Studied by in Situ Attenuated Total Reflection-Fourier Transform Infrared Spectroscopy: Deposition Concepts, Wet Adhesiveness, and Biomedical Applications. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:8129-8144. [PMID: 29923406 DOI: 10.1021/acs.langmuir.8b00897] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In this conceptual contribution, thin functional coatings consisting of either pure polyelectrolytes (PELs) or complexes between oppositely charged PELs at model and applied substrates are outlined. Latter PEL/PEL complexes were deposited by two concepts. In a first well-known concept, PEL multilayers (PEM) were consecutively deposited according to the layer-by-layer (LbL) technique. In a second less known concept, PEL complex (PEC) nanoparticles (NPs) preformed by mixing polycation (PC) and polyanion (PA) solutions were deposited in one step. Both concepts based on binary oppositely charged PELs are compared to one based on a single polycation system. Examples shall be given on adhesiveness, nanostructure, and biomedical applications of PEM and PEC NP coatings. In situ attenuated total reflection (ATR) infrared (IR) spectroscopy, circular dichroism (CD), and scanning force microscopy (SFM) were used for molecular, optical, and microscopic characterization. At first, results on the adsorbed amount and wet adhesiveness of pure (single-component) PEL coatings as a function of charge density are given to motivate coatings of mixed oppositely charged PELs. Second, the wet adhesiveness of PEM and PEC NP coatings of identical PEL compounds in aqueous media varying the molar charge ratio ( n-/ n+) and the deposition step z, respectively, is compared. Upon comparing the three PEL deposition concepts, it is suggested that the lack or absence of excess charge at the PEL/surface interface is one of the main factors for the wet adhesiveness of all pure PEL, PEM, and PEC NP coatings. Finally, the potential of PEM and PEC NP coatings for biomedical applications is outlined. Concerning biopassivation, PEM coatings excessed or terminated by PA repel proteins with low isoelectric points. Concerning bioactivation, PEM coatings loaded with antibiotics as well as PEC NP coatings loaded with therapeutic bisphosphonates showed retarded, optionally temperature responsive drug release for applications in acute surgery and bone healing, and immunoglobulin/PEL complex coatings might open theranostic applications.
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Affiliation(s)
- Martin Müller
- Leibniz-Institut für Polymerforschung Dresden e.V. , Hohe Str. 6 , 01069 Dresden , Germany
- Technische Universität Dresden , FR Chemie und Lebensmittelchemie , 01062 Dresden , Germany
| | - Birgit Urban
- Leibniz-Institut für Polymerforschung Dresden e.V. , Hohe Str. 6 , 01069 Dresden , Germany
| | - Simona Schwarz
- Leibniz-Institut für Polymerforschung Dresden e.V. , Hohe Str. 6 , 01069 Dresden , Germany
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Interaction of Poly(l-lysine)/Polysaccharide Complex Nanoparticles with Human Vascular Endothelial Cells. NANOMATERIALS 2018; 8:nano8060358. [PMID: 29882877 PMCID: PMC6027445 DOI: 10.3390/nano8060358] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Revised: 05/07/2018] [Accepted: 05/15/2018] [Indexed: 12/11/2022]
Abstract
Angiogenesis plays an important role in both soft and hard tissue regeneration, which can be modulated by therapeutic drugs. If nanoparticles (NP) are used as vectors for drug delivery, they have to encounter endothelial cells (EC) lining the vascular lumen, if applied intravenously. Herein the interaction of unloaded polyelectrolyte complex nanoparticles (PECNP) composed of cationic poly(l-lysine) (PLL) and various anionic polysaccharides with human vascular endothelial cells (HUVEC) was analyzed. In particular PECNP were tested for their cell adhesive properties, their cellular uptake and intracellular localization considering composition and net charge. PECNP may form a platform for both cell coating and drug delivery. PECNP, composed of PLL in combination with the polysaccharides dextran sulfate (DS), cellulose sulfate (CS) or heparin (HEP), either unlabeled or labeled with fluorescein isothiocyanate (FITC) and either with positive or negative net charge were prepared. PECNP were applied to human umbilical cord vein endothelial cells (HUVEC) in both, the volume phase and immobilized phase at model substrates like tissue culture dishes. The attachment of PECNP to the cell surface, their intracellular uptake, and effects on cell proliferation and growth behavior were determined. Immobilized PECNP reduced attachment of HUVEC, most prominently the systems PLL/HEP and PLL/DS. A small percentage of immobilized PECNP was taken up by cells during adhesion. PECNP in the volume phase showed no effect of the net charge sign and only minor effects of the composition on the binding and uptake of PECNP at HUVEC. PECNP were stored in endosomal vesicles in a cumulative manner without apparent further processing. During mitosis, internalized PECNP were almost equally distributed among the dividing cells. Both, in the volume phase and immobilized at the surface, PECNP composed of PLL/HEP and PLL/DS clearly reduced cell proliferation of HUVEC, however without an apparent cytotoxic effect, while PLL/CS composition showed minor impairment. PECNP have an anti-adhesive effect on HUVEC and are taken up by endothelial cells which may negatively influence the proliferation rate of HUVEC. The negative effects were less obvious with the composition PLL/CS. Since uptake and binding for PLL/HEP was more efficient than for PLL/DS, PECNP of PLL/HEP may be used to deliver growth factors to endothelial cells during vascularization of bone reconstitution material, whereas those of PLL/CS may have an advantage for substituting biomimetic bone scaffold material.
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Nakahata R, Yusa SI. Preparation of Water-soluble Polyion Complex (PIC) Micelles Covered with Amphoteric Random Copolymer Shells with Pendant Sulfonate and Quaternary Amino Groups. Polymers (Basel) 2018; 10:E205. [PMID: 30966241 PMCID: PMC6415021 DOI: 10.3390/polym10020205] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2018] [Revised: 02/15/2018] [Accepted: 02/17/2018] [Indexed: 01/29/2023] Open
Abstract
An amphoteric random copolymer (P(SA)91) composed of anionic sodium 2-acrylamido-2-methylpropanesulfonate (AMPS, S) and cationic 3-acrylamidopropyl trimethylammonium chloride (APTAC, A) was prepared via reversible addition-fragmentation chain transfer (RAFT) radical polymerization. The subscripts in the abbreviations indicate the degree of polymerization (DP). Furthermore, AMPS and APTAC were polymerized using a P(SA)91 macro-chain transfer agent to prepare an anionic diblock copolymer (P(SA)91S67) and a cationic diblock copolymer (P(SA)91A88), respectively. The DP was estimated from quantitative 13C NMR measurements. A stoichiometrically charge neutralized mixture of the aqueous P(SA)91S67 and P(SA)91A88 formed water-soluble polyion complex (PIC) micelles comprising PIC cores and amphoteric random copolymer shells. The PIC micelles were in a dynamic equilibrium state between PIC micelles and charge neutralized small aggregates composed of a P(SA)91S67/P(SA)91A88 pair. Interactions between PIC micelles and fetal bovine serum (FBS) in phosphate buffered saline (PBS) were evaluated by changing the hydrodynamic radius (Rh) and light scattering intensity (LSI). Increases in Rh and LSI were not observed for the mixture of PIC micelles and FBS in PBS for one day. This observation suggests that there is no interaction between PIC micelles and proteins, because the PIC micelle surfaces were covered with amphoteric random copolymer shells. However, with increasing time, the diblock copolymer chains that were dissociated from PIC micelles interacted with proteins.
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Affiliation(s)
- Rina Nakahata
- Department of Applied Chemistry, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2280, Japan.
| | - Shin-Ichi Yusa
- Department of Applied Chemistry, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2280, Japan.
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15
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Xu Y, Asghar S, Yang L, Chen Z, Li H, Shi W, Li Y, Shi Q, Ping Q, Xiao Y. Nanoparticles based on chitosan hydrochloride/hyaluronic acid/PEG containing curcumin: In vitro evaluation and pharmacokinetics in rats. Int J Biol Macromol 2017; 102:1083-1091. [DOI: 10.1016/j.ijbiomac.2017.04.105] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2017] [Revised: 04/21/2017] [Accepted: 04/26/2017] [Indexed: 12/20/2022]
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Polymyxin B containing polyion complex (PIC) nanoparticles: Improving the antimicrobial activity by tailoring the degree of polymerisation of the inert component. Sci Rep 2017; 7:9396. [PMID: 28839223 PMCID: PMC5570901 DOI: 10.1038/s41598-017-09667-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Accepted: 07/20/2017] [Indexed: 11/30/2022] Open
Abstract
Here, we describe the preparation and characterisation of polyion complex (PIC) nanoparticles containing last resort antimicrobial polymyxin B (Pol-B). PIC nanoparticles were prepared with poly(styrene sulphonate) (PSS) as an inert component, across a range of degrees of polymerisation to evaluate the effect that multivalency of this electrolyte has on the stability and antimicrobial activity of these nanoparticles. Our results demonstrate that while nanoparticles prepared with longer polyelectrolytes are more stable under simulated physiological conditions, those prepared with shorter polyelectrolytes have a higher antimicrobial activity. Tailoring the degree of polymerisation and the ratio of the components we have been able to identify a formulation that shows a sustained inhibitory effect on the growth of P. aeruginosa and can reduce the number of viable colonies of this pathogen over 10,000 times more effectively than our previously reported formulation.
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Müller M, Urban B, Vehlow D, Möller M. Adjusting and switching the elution of bone therapeutics from thermoaddressable coatings of poly(N-isopropylacrylamide-co-acrylic acid)/ethylenediaminocellulose complex particles. Colloid Polym Sci 2017. [DOI: 10.1007/s00396-017-4112-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Bourganis V, Karamanidou T, Kammona O, Kiparissides C. Polyelectrolyte complexes as prospective carriers for the oral delivery of protein therapeutics. Eur J Pharm Biopharm 2017; 111:44-60. [DOI: 10.1016/j.ejpb.2016.11.005] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Revised: 11/04/2016] [Accepted: 11/07/2016] [Indexed: 10/20/2022]
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Petzold R, Vehlow D, Urban B, Grab AL, Cavalcanti-Adam EA, Alt V, Müller M. Colloid, adhesive and release properties of nanoparticular ternary complexes between cationic and anionic polysaccharides and basic proteins like bone morphogenetic protein BMP-2. Colloids Surf B Biointerfaces 2016; 151:58-67. [PMID: 27984825 DOI: 10.1016/j.colsurfb.2016.11.029] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2016] [Revised: 10/19/2016] [Accepted: 11/23/2016] [Indexed: 10/20/2022]
Abstract
Herein we describe an interfacial local drug delivery system for bone morphogenetic protein 2 (BMP-2) based on coatings of polyelectrolyte complex (PEC) nanoparticles (NP). The application horizon is the functionalization of bone substituting materials (BSM) used for the therapy of systemic bone diseases. Nanoparticular ternary complexes of cationic and anionic polysaccharides and BMP-2 or two further model proteins, respectively, were prepared in dependence of the molar mixing ratio, pH value and of the cationic polysaccharide. As further proteins chymotrypsin (CHY) and papain (PAP) were selected, which served as model proteins for BMP-2 due to similar isoelectric points and molecular weights. As charged polysaccharides ethylenediamine modified cellulose (EDAC) and trimethylammonium modified cellulose (PQ10) were combined with cellulose sulphatesulfate (CS). Mixing diluted cationic and anionic polysaccharide and protein solutions according to a slight either anionic or cationic excess charge colloidal ternary dispersions formed, which were cast onto germanium model substrates by water evaporation. Dynamic light scattering (DLS) demonstrated, that these dispersions were colloidally stable for at least one week. Fourier Transform Infrared (FTIR) showed, that the cast protein loaded PEC NP coatings were irreversibly adhesive at the model substrate in contact to HEPES buffer and solely CHY, PAP and BMP-2 were released within long-term time scale. Advantageously, out of the three proteins BMP-2 showed the smallest initial burst and the slowest release kinetics and around 25% of the initial BMP-2 content were released within 14days. Released BMP-2 showed significant activity in the myoblast cells indicating the ability to regulate the formation of new bone. Therefore, BMP-2 loaded PEC NP are suggested as novel promising tool for the functionalization of BSM used for the therapy of systemic bone diseases.
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Affiliation(s)
- R Petzold
- Technische Universität Dresden, Fachrichtung Chemie und Lebensmittelchemie, 01062 Dresden, Germany
| | - D Vehlow
- Leibniz-Institut für Polymerforschung Dresden e.V., Abt. Polyelektrolyte und Dispersionen, Hohe Straße 6, 01069 Dresden, Germany; Technische Universität Dresden, Fachrichtung Chemie und Lebensmittelchemie, 01062 Dresden, Germany
| | - B Urban
- Leibniz-Institut für Polymerforschung Dresden e.V., Abt. Polyelektrolyte und Dispersionen, Hohe Straße 6, 01069 Dresden, Germany
| | - A L Grab
- Ruprecht-Karls-Universität Heidelberg, Institut für Physikalische Chemie, Abt. Biophysikalische Chemie, Im Neuenheimer Feld 253, 69120 Heidelberg, Germany
| | - E A Cavalcanti-Adam
- Ruprecht-Karls-Universität Heidelberg, Institut für Physikalische Chemie, Abt. Biophysikalische Chemie, Im Neuenheimer Feld 253, 69120 Heidelberg, Germany; Max-Planck-Institut für Medizinische Forschung, Abt. Zelluläre Biophysik, Jahnstr. 29, 69120 Heidelberg, Germany
| | - V Alt
- Klinik und Poliklinik für Unfallchirurgie, Justus-Liebig-Universität Giessen, Rudolf-Buchheim-Straße 7, 35385 Giessen, Germany
| | - M Müller
- Leibniz-Institut für Polymerforschung Dresden e.V., Abt. Polyelektrolyte und Dispersionen, Hohe Straße 6, 01069 Dresden, Germany; Technische Universität Dresden, Fachrichtung Chemie und Lebensmittelchemie, 01062 Dresden, Germany.
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Wu D, Ensinas A, Verrier B, Primard C, Cuvillier A, Champier G, Paul S, Delair T. Zinc-Stabilized Chitosan-Chondroitin Sulfate Nanocomplexes for HIV-1 Infection Inhibition Application. Mol Pharm 2016; 13:3279-91. [PMID: 27454202 DOI: 10.1021/acs.molpharmaceut.6b00568] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Polyelectrolyte complexes (PECs) constituted of chitosan and chondroitin sulfate (ChonS) were formed by the one-shot addition of default amounts of polyanion to an excess of polycation. Key variables of the formulation process (e.g., degree of depolymerization, charge mixing ratio, the concentration, and pH of polyelectrolyte solutions) were optimized based on the PECs sizes and polydispersities. The PECs maintained their colloidal stability at physiological salt concentration and pH thanks to the complexation of polyelectrolytes with zinc(II) ion during the nanoPECs formation process. The PECs were capable of encapsulating an antiretroviral drug tenofovir (TF) with a minimal alteration on the colloidal stability of the dispersion. Moreover, the particle interfaces could efficiently be functionalized with anti-OVA or anti-α4β7 antibodies with conservation of the antibody biorecognition properties over 1 week of storage in PBS at 4 °C. In vitro cytotoxicity studies showed that zinc(II) stabilized chitosan-ChonS nanoPECs were noncytotoxic to human peripheral blood mononuclear cells (PBMCs), and in vitro antiviral activity test demonstrated that nanoparticles formulations led to a dose-dependent reduction of HIV-1 infection. Using nanoparticles as a drug carrier system decreases the IC50 (50% inhibitory concentration) from an aqueous TF of 4.35 μmol·L(-1) to 1.95 μmol·L(-1). Significantly, zinc ions in this system also exhibited a synergistic effect in the antiviral potency. These data suggest that chitosan-ChonS nanoPECs can be promising drug delivery system to improve the antiviral potency of drugs to the viral reservoirs for the treatment of HIV infection.
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Affiliation(s)
- Danjun Wu
- Ingénierie des Matériaux Polymères, UMR CNRS 5223, Université Claude Bernard Lyon 1 , 15 Bd. André Latarjet, 69622 Villeurbanne Cedex, France
| | - Agathe Ensinas
- Institut de Biologie et Chimie des Protéines UMR 5305, CNRS/Université de Lyon , 69367 Lyon Cedex 07, France
| | - Bernard Verrier
- Institut de Biologie et Chimie des Protéines UMR 5305, CNRS/Université de Lyon , 69367 Lyon Cedex 07, France
| | | | | | - Gaël Champier
- B-Cell Design , 98 Rue Charles Legendre, 87000 Limoges, France
| | - Stephane Paul
- Groupe Immunité des Muqueuses et Agents Pathogènes, INSERM Centre d'Investigation Clinique en Vaccinologie 1408, Université de Lyon , 15 rue Ambroise Paré, 42023 Saint-Etienne Cedex 2, France
| | - Thierry Delair
- Ingénierie des Matériaux Polymères, UMR CNRS 5223, Université Claude Bernard Lyon 1 , 15 Bd. André Latarjet, 69622 Villeurbanne Cedex, France
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Müller M, Urban B. Adhesive Reactive Nanoparticles of Poly(ethyleneimine)/Poly(maleic acid-co
-propylene) Complexes: A Novel Concept for the Immobilization of Pollutant Removing Laccase. MACROMOL CHEM PHYS 2016. [DOI: 10.1002/macp.201600247] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Martin Müller
- Leibniz-Institut für Polymerforschung Dresden e.V; Abteilung Polyelektrolyte und Dispersionen; Hohe Straße 6 01069 Dresden Germany
- Technische Universität Dresden; Department of Chemistry and Food Chemistry; 01062 Dresden Germany
| | - Birgit Urban
- Leibniz-Institut für Polymerforschung Dresden e.V; Abteilung Polyelektrolyte und Dispersionen; Hohe Straße 6 01069 Dresden Germany
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Naoyama K, Mori T, Katayama Y, Kishimura A. Fabrication of Dendrimer-Based Polyion Complex Submicrometer-Scaled Structures with Enhanced Stability under Physiological Conditions. Macromol Rapid Commun 2016; 37:1087-93. [DOI: 10.1002/marc.201600171] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2016] [Revised: 04/27/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Kenshiro Naoyama
- Graduate School of Systems Life Sciences; Kyushu University; 744 Moto-oka Nishi-ku Fukuoka 819-0395 Japan
| | - Takeshi Mori
- Graduate School of Systems Life Sciences; Kyushu University; 744 Moto-oka Nishi-ku Fukuoka 819-0395 Japan
- Department of Applied Chemistry; Faculty of Engineering; Kyushu University; 744 Moto-oka Nishi-ku Fukuoka 819-0395 Japan
- Center for Future Chemistry; Kyushu University; 744 Moto-oka Nishi-ku Fukuoka 819-0395 Japan
| | - Yoshiki Katayama
- Graduate School of Systems Life Sciences; Kyushu University; 744 Moto-oka Nishi-ku Fukuoka 819-0395 Japan
- Department of Applied Chemistry; Faculty of Engineering; Kyushu University; 744 Moto-oka Nishi-ku Fukuoka 819-0395 Japan
- Center for Future Chemistry; Kyushu University; 744 Moto-oka Nishi-ku Fukuoka 819-0395 Japan
- Center for Molecular Systems; Kyushu University; 744 Moto-oka Nishi-ku Fukuoka 819-0395 Japan
- Center for Advanced Medical Innovation; Kyushu University; 3-1-1 Maedashi Higashi-ku Fukuoka 812-8582 Japan
| | - Akihiro Kishimura
- Graduate School of Systems Life Sciences; Kyushu University; 744 Moto-oka Nishi-ku Fukuoka 819-0395 Japan
- Department of Applied Chemistry; Faculty of Engineering; Kyushu University; 744 Moto-oka Nishi-ku Fukuoka 819-0395 Japan
- Center for Molecular Systems; Kyushu University; 744 Moto-oka Nishi-ku Fukuoka 819-0395 Japan
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Polyelectrolyte Complex Based Interfacial Drug Delivery System with Controlled Loading and Improved Release Performance for Bone Therapeutics. NANOMATERIALS 2016; 6:nano6030053. [PMID: 28344311 PMCID: PMC5302517 DOI: 10.3390/nano6030053] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Revised: 02/26/2016] [Accepted: 03/14/2016] [Indexed: 11/17/2022]
Abstract
An improved interfacial drug delivery system (DDS) based on polyelectrolyte complex (PEC) coatings with controlled drug loading and improved release performance was elaborated. The cationic homopolypeptide poly(l-lysine) (PLL) was complexed with a mixture of two cellulose sulfates (CS) of low and high degree of substitution, so that the CS and PLL solution have around equal molar charged units. As drugs the antibiotic rifampicin (RIF) and the bisphosphonate risedronate (RIS) were integrated. As an important advantage over previous PEC systems this one can be centrifuged, the supernatant discarded, the dense pellet phase (coacervate) separated, and again redispersed in fresh water phase. This behavior has three benefits: (i) Access to the loading capacity of the drug, since the concentration of the free drug can be measured by spectroscopy; (ii) lower initial burst and higher residual amount of drug due to removal of unbound drug and (iii) complete adhesive stability due to the removal of polyelectrolytes (PEL) excess component. It was found that the pH value and ionic strength strongly affected drug content and release of RIS and RIF. At the clinically relevant implant material (Ti40Nb) similar PEC adhesive and drug release properties compared to the model substrate were found. Unloaded PEC coatings at Ti40Nb showed a similar number and morphology of above cultivated human mesenchymal stem cells (hMSC) compared to uncoated Ti40Nb and resulted in considerable production of bone mineral. RIS loaded PEC coatings showed similar effects after 24 h but resulted in reduced number and unhealthy appearance of hMSC after 48 h due to cell toxicity of RIS.
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Kulkarni AD, Vanjari YH, Sancheti KH, Patel HM, Belgamwar VS, Surana SJ, Pardeshi CV. Polyelectrolyte complexes: mechanisms, critical experimental aspects, and applications. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2016; 44:1615-25. [DOI: 10.3109/21691401.2015.1129624] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Bago Rodriguez AM, Binks BP, Sekine T. Novel stabilisation of emulsions by soft particles: polyelectrolyte complexes. Faraday Discuss 2016; 191:255-285. [DOI: 10.1039/c6fd00011h] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
We put forward the concept of a novel particle stabiliser of oil–water emulsions, being the polyelectrolyte complex (PEC) formed between oppositely charged water-soluble polymers in cases where either polymer alone is incapable of stabilising an emulsion. Using poly(4-styrene sulfonate) sodium salt, PSSNa and poly(diallyldimethylammonium chloride), PDADMAC, of low polydispersity and similar molecular mass, we correlate the behaviour of their mixtures in water with that of emulsions after addition of oil. In aqueous mixtures, spherical particles of diameters between 100 and 150 nm are formed through electrostatic interactions between charged polymer chains. Around equal mole fractions of the two polymers, the zeta potential of the particles reverses in sign and emulsions of oil-in-water (o/w) for a range of oils can be prepared which are the most stable to coalescence and creaming. The effects of PEC concentration and the oil : water ratio have been examined. All emulsions are o/w and stability is achieved by close-packed particle layers at drop interfaces and particle aggregation in the continuous phase. Increasing the salt concentration initially causes destabilisation of the aqueous particle dispersion due to particle aggregation followed by dissolution of particles at high concentrations; the corresponding emulsions change from being stable to completely unstable and are then re-stabilised due to adsorption of uncharged individual polymer molecules.
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Affiliation(s)
| | | | - Tomoko Sekine
- Shiseido Global Innovation Center
- Yokohama 224-8558
- Japan
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26
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Zhang Q, Lin D, Yao S. Review on biomedical and bioengineering applications of cellulose sulfate. Carbohydr Polym 2015; 132:311-22. [DOI: 10.1016/j.carbpol.2015.06.041] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Revised: 06/11/2015] [Accepted: 06/12/2015] [Indexed: 02/06/2023]
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Angelescu DG, Linse P. Branched-linear polyion complexes at variable charge densities. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2015; 27:355101. [PMID: 26249029 DOI: 10.1088/0953-8984/27/35/355101] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Structural behavior of complexes formed by a charged and branched copolymer and an oppositely charged and linear polyion was examined by Monte Carlo simulations employing a coarse-grained bead-spring model. The fractional bead charge and the branching density were systematically varied; the former between 0e and 1e and the latter such that both the comb-polymer and the bottle-brush limits were included. The number of beads of the main chain of the branched copolymer and of the linear polyion was always kept constant and equal, and a single side-chain length was used. Our analysis involved characterization of the complex as well as investigation of size, shape, and flexibility of the charged moieties. An interplay between Coulomb interaction and side-chain repulsion governed the structure of the polyion complex. At strong Coulomb interaction, the complexes underwent a gradual transition from a globular structure at low branching density to an extended one at high branching density. As the electrostatic coupling was decreased, the transition was smoothened and shifted to lower branching density, and, eventually, a behavior similar to that found for neutral branched polymer was observed. Structural analogies and dissimilarities with uncharged branched polymers in poor solutions are discussed.
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Affiliation(s)
- Daniel G Angelescu
- Romanian Academy, Institute of Physical Chemistry Ilie Murgulescu, Splaiul Independentei 202, 060021 Bucharest, Romania
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28
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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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Drug delivery and cell interaction of adhesive poly(ethyleneimine)/sulfated polysaccharide complex particle films. Biointerphases 2015; 10:011001. [PMID: 25708630 DOI: 10.1116/1.4913195] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Herein, the authors report and review polyelectrolyte complex (PEC) nanoparticles (NPs) loaded with zoledronate (ZOL) and simvastatin and their effects on bone cells. PEC NPs are intended for modification of bone substitute materials. For characterization, they can be solution casted on germanium (Ge) substrates serving as analytically accessible model substrate. PEC NPs were generated by mixing poly(ethyleneimine) (PEI) either with linear cellulose sulfate (CS) or with branched dextransulfate (DS). Four important requirements for drug loaded PEC NPs and their films are addressed herein, which are the colloidal stability of PEC dispersions (1), interfacial stability (2), cytocompatibility (3), and retarded drug release (4). Dynamic light scattering measurements (DLS) showed that both PEI/CS and PEI/DS PEC NP were obtained with hydrodynamic radii in the range of 35-170 nm and were colloidally stable up to several months. Transmission FTIR spectroscopy evidenced that films of both systems were stable in contact to the release medium up to several days. ZOL-loaded PEI/CS nanoparticles, which were immobilized on an osteoblast-derived extracellular matrix, reduced significantly the resorption and the metabolic activity of human monocyte-derived osteoclasts. FTIR spectroscopy at cast PEC/drug films at Ge substrates revealed retarded drug releases in comparison to the pure drug films.
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Polyelectrolyte Complexes in Flocculation Applications. ADVANCES IN POLYMER SCIENCE 2013. [DOI: 10.1007/12_2012_205] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
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Starchenko V, Müller M, Lebovka N. Sizing of PDADMAC/PSS Complex Aggregates by Polyelectrolyte and Salt Concentration and PSS Molecular Weight. J Phys Chem B 2012. [DOI: 10.1021/jp3095243] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Vitaliy Starchenko
- Leibniz Institute of Polymer Research Dresden (IPF Dresden), Department of Polyelectrolytes and Dispersions, Hohe
Strasse 6, D-01069 Dresden, Germany
- F.D. Ovcharenko
Institute of Biocolloid Chemistry, NAS of Ukraine, Vernadskogo Blvd. 42, Kyiv 03680, Ukraine
| | - Martin Müller
- Leibniz Institute of Polymer Research Dresden (IPF Dresden), Department of Polyelectrolytes and Dispersions, Hohe
Strasse 6, D-01069 Dresden, Germany
| | - Nikolai Lebovka
- F.D. Ovcharenko
Institute of Biocolloid Chemistry, NAS of Ukraine, Vernadskogo Blvd. 42, Kyiv 03680, Ukraine
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