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Okamoto Y, Higuchi M, Matsubara S. Vesicle-like Nanocapsules Formed by Self-Assembly of Peptides with Oligoproline and -Leucine. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:12802-12809. [PMID: 38850260 DOI: 10.1021/acs.langmuir.4c01412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2024]
Abstract
Since drug carriers are envisaged to be used in a wide variety of situations and environments, nanocarriers with diverse properties, such as biocompatibility, biodegradability, nonimmunogenicity, adequate particle size, robustness, and cell permeability, are required. Here, we report the construction of novel nanocapsules with the above-mentioned features by the self-assembly of peptides composed of oligoproline and oligoleucine (i.e., H-Pro10Leu4-NH2 and H-Pro10Leu6-NH2). The peptides self-organized via hydrogen bonds and hydrophobic interactions between oligoleucine moieties to form vesicle-like nanocapsules with cationic oligoproline exposed on the surface. The guest encapsulation experiments revealed that the nanocapsules were capable of uptake of both water-soluble and insoluble compounds. Furthermore, positively charged and/or oligoproline-based peptides are known to improve cell permeability and cellular uptake, suggesting that the peptide nanocapsules are good candidates for nanocarriers to complement liposomes and polymer micelles.
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Affiliation(s)
- Yui Okamoto
- Department of Life Science and Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology, Nagoya 466-8555, Japan
| | - Masahiro Higuchi
- Department of Life Science and Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology, Nagoya 466-8555, Japan
| | - Shogo Matsubara
- Department of Life Science and Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology, Nagoya 466-8555, Japan
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Gong L, Zhu J, Yang Y, Qiao S, Ma L, Wang H, Zhang Y. Effect of polyethylene glycol on polysaccharides: From molecular modification, composite matrixes, synergetic properties to embeddable application in food fields. Carbohydr Polym 2024; 327:121647. [PMID: 38171672 DOI: 10.1016/j.carbpol.2023.121647] [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] [Received: 09/20/2023] [Revised: 11/21/2023] [Accepted: 11/25/2023] [Indexed: 01/05/2024]
Abstract
Polyethylene glycol (PEG) is a flexible, water-soluble, non-immunogenic, as well as biocompatible polymer, and it could synergize with polysaccharides for food applications. The molecular modification strategies, including covalent bond interactions (amino groups, carboxyl groups, aldehyde groups, tosylate groups, etc.), and non-covalent bond interactions (hydrogen bonding, electrostatic interactions, etc.) on PEG molecular chains are discussed. Its versatile structure, group modifiability, and amphiphilic block buildability could improve the functions of polysaccharides (e.g., chitosan, cellulose, starch, alginate, etc.) and adjust the properties of combined PEG/polysaccharides with outstanding chain tunability and matrix processability owing to plasticizing effects, compatibilizing effects, steric stabilizing effects and excluded volume effects by PEG, for achieving the diverse performance targets. The synergetic properties of PEG/polysaccharides with remarkable architecture were summarized, including mechanical properties, antibacterial activity, antioxidant performance, self-healing properties, carrier and delivery characteristics. The PEG/polysaccharides with excellent combined properties and embeddable merits illustrate potential applications including food packaging, food intelligent indication/detection, food 3D printing and nutraceutical food absorption. Additionally, prospects (like food innovation and preferable nutrient utilization) and key challenges (like structure-effectiveness-applicability relationship) for PEG/polysaccharides are proposed and addressed for food fields.
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Affiliation(s)
- Linshan Gong
- College of Food Science, Southwest University, Chongqing 400715, PR China
| | - Juncheng Zhu
- College of Food Science, Southwest University, Chongqing 400715, PR China
| | - Yuxin Yang
- College of Food Science, Southwest University, Chongqing 400715, PR China
| | - Shihao Qiao
- College of Food Science, Southwest University, Chongqing 400715, PR China
| | - Liang Ma
- College of Food Science, Southwest University, Chongqing 400715, PR China
| | - Hongxia Wang
- College of Food Science, Southwest University, Chongqing 400715, PR China; Chongqing Key Laboratory of Speciality Food Co-Built by Sichuan and Chongqing, Chongqing 400715, PR China; Key Laboratory of Quality and Safety Control of Citrus Fruits, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing, 400712, PR China; Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, Chongqing 400715, PR China; Key Laboratory of Condiment Supervision Technology for State Market Regulation, Chongqing 401121, PR China.
| | - Yuhao Zhang
- College of Food Science, Southwest University, Chongqing 400715, PR China; Chongqing Key Laboratory of Speciality Food Co-Built by Sichuan and Chongqing, Chongqing 400715, PR China; Key Laboratory of Quality and Safety Control of Citrus Fruits, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing, 400712, PR China; Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, Chongqing 400715, PR China; Key Laboratory of Condiment Supervision Technology for State Market Regulation, Chongqing 401121, PR China.
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Ghosh R, Dey J. pH-Responsive Vesicle Formation by PEGylated Cholesterol Derivatives: Physicochemical Characterization, Stability, Encapsulation, and Release Study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:5829-5838. [PMID: 32388987 DOI: 10.1021/acs.langmuir.0c00562] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
PEGylated vesicles are known to serve as blood-persistent drug-delivery systems (DDSs) with potential applications in intravenous drug administration. pH-responsive PEGylated vesicles are also among the most promising stimuli-responsive carriers for drug delivery and controlled release for cancer chemotherapy. Herein, we report design and synthesis of two novel pH-responsive amphiphiles by coupling a cholesterol (Chol) and poly(ethylene glycol) chain with l-cysteine amino acid through hydrolysable linkages. The objective of this work is to physicochemically characterize the nanoaggregates of the amphiphiles under different experimental conditions. We have demonstrated spontaneous vesicle formation by the amphiphiles in water using various spectroscopic, calorimetric, and microscopic techniques. The size of vesicles was observed to increase on reduction of solution pH and increase in amphiphile concentration. The vesicles were found to be sufficiently stable under physiological conditions and were shown to be able to encapsulate not only hydrophilic dyes in their aqueous core but also hydrophobic guest molecules in the bilayer membrane constituted by the Chol units. These nanosized vesicles exhibit pH-triggered release of encapsulated dye molecules in acidic pH. Thus, these spontaneously formed stable vesicles might hold potential as biocompatible DDSs in cancer chemotherapy.
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Affiliation(s)
- Rita Ghosh
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Joykrishna Dey
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
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IIJIMA M, KAWADA M, SATO Y, PUA M, KAMEYAMA M. Synthesis of Hetero-Telechelic Poly(ethylene glycol)s with a Carboxyl Group at the Alpha-Terminus. KOBUNSHI RONBUNSHU 2019. [DOI: 10.1295/koron.2019-0006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Michihiro IIJIMA
- National Institute of Technology, Oyama College Department of Materials Chemistry and Bioengineering
| | - Maiko KAWADA
- National Institute of Technology, Oyama College Department of Materials Chemistry and Bioengineering
| | - Yuna SATO
- National Institute of Technology, Oyama College Department of Materials Chemistry and Bioengineering
| | - MinLey PUA
- National Institute of Technology, Oyama College Department of Materials Chemistry and Bioengineering
| | - Masayuki KAMEYAMA
- National Institute of Technology, Oyama College Department of Materials Chemistry and Bioengineering
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Archaeal tetraether lipid coatings-A strategy for the development of membrane analog spacer systems for the site-specific functionalization of medical surfaces. Biointerphases 2018; 13:011004. [PMID: 29382205 DOI: 10.1116/1.5008816] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The primary goal of our investigation was the development of a versatile immobilization matrix based on archaeal tetraether lipids that meets the most important prerequisites to render an implant surface bioactive by binding specific functional groups or functional polymers with the necessary flexibility and an optimal spatial arrangement to be bioavailable. From this point of view, it appears obvious that numerous efforts made recently to avoid initial bacterial adhesion on catheter surfaces as an important prerequisite of material associated infection episodes have shown only a limited efficiency since the bioactive entities could not be presented in an optimal conformation and a stable density. A significant improvement of this situation can be achieved by highly specific biomimetic modifications of the catheter surfaces. The term "biomimetic" originates from the fact that specific archaeal tetraether lipids were introduced to form a membrane analog monomolecular spacer system, which (1) can be immobilized on nearly all solid surfaces and (2) chemically modified to present a tailor-made functionality in contact with aqueous media either to avoid or inhibit surface fouling or to equip any implant surface with the necessary chemical functionality to enable cell adhesion and tissue integration. Ultrathin films based on tetraether lipids isolated from archaea Thermoplasma acidophilum were used as a special biomimetic immobilization matrix on the surface of commercial medical silicon elastomers. A complete performance control of the membrane analog coatings was realized in addition to biofunctionality tests, including the proof of cytotoxicity and hemocompatibility according to DIN EN ISO 10993. In order to make sure that the developed immobilization matrix including the grafted functional groups are biocompatible under in vivo-conditions, specific animal tests were carried out to examine the in vivo-performance. It can be concluded that the tetraether lipid based coating systems on silicone have shown no signs of cytotoxicity and a good hemocompatibility. Moreover, no mutagenic effects, no irritation effects, and no sensitization effects could be demonstrated. After an implantation period of 28 days, no irregularities were found.
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Pendleton ED, Sullivan CJ, Sasmor HH, Bruse KD, Mayfield TB, Valente DL, Abrams RE, Griffey RH, Dresios J. Actin exposure upon tissue injury is a targetable wound site-specific protein marker. Biochem Biophys Rep 2016; 7:56-62. [PMID: 28955889 PMCID: PMC5613279 DOI: 10.1016/j.bbrep.2016.05.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Revised: 04/05/2016] [Accepted: 05/17/2016] [Indexed: 11/24/2022] Open
Abstract
Background Identification of wound-specific markers would represent an important step toward damaged tissue detection and targeted delivery of biologically important materials to injured sites. Such delivery could minimize the amount of therapeutic materials that must be administered and limit potential collateral damage on nearby normal tissues. Yet, biological markers that are specific for injured tissue sites remain elusive. Methods In this study, we have developed an immunohistological approach for identification of protein epitopes specifically exposed in wounded tissue sites. Results Using ex-vivo tissue samples in combination with fluorescently-labeled antibodies we show that actin, an intracellular cytoskeletal protein, is specifically exposed upon injury. The targetability of actin in injured sites has been demonstrated in vivo through the specific delivery of anti-actin conjugated particles to the wounded tissue in a lethal rat model of grade IV liver injury. Conclusions These results illustrate that identification of injury-specific protein markers and their targetability for specific delivery is feasible. General significance Identification of wound-specific targets has important medical applications as it could enable specific delivery of various products, such as expression vectors, therapeutic drugs, hemostatic materials, tissue healing, or scar prevention agents, to internal sites of penetrating or surgical wounds regardless of origin, geometry or location. A method for identification of wound-specific protein epitopes was developed. Actin exposure was identified as an injury-specific protein marker. Exposure of actin at injured sites is rapid and stable in the presence of blood. Actin targeting for materials delivery to wounded sites was demonstrated in vivo.
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Affiliation(s)
- Erik D. Pendleton
- Leidos, Inc., 10260 Campus Point Drive, San Diego, CA 92121, United States
| | | | - Henri H. Sasmor
- Leidos, Inc., 10260 Campus Point Drive, San Diego, CA 92121, United States
| | - Kristy D. Bruse
- Lovelace Respiratory Research Institute, 2425 Ridgecrest Drive SE, Albuquerque, NM 87108, United States
| | | | - David L. Valente
- Leidos, Inc., 10260 Campus Point Drive, San Diego, CA 92121, United States
| | - Rachel E. Abrams
- Leidos, Inc., 10260 Campus Point Drive, San Diego, CA 92121, United States
| | - Richard H. Griffey
- Leidos, Inc., 10260 Campus Point Drive, San Diego, CA 92121, United States
| | - John Dresios
- Leidos, Inc., 10260 Campus Point Drive, San Diego, CA 92121, United States
- Correspondence to: Leidos, Inc., 10260 Campus Point Drive, SanDiego, CA 92121. U.S.A.
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Li M, Gao M, Fu Y, Chen C, Meng X, Fan A, Kong D, Wang Z, Zhao Y. Acetal-linked polymeric prodrug micelles for enhanced curcumin delivery. Colloids Surf B Biointerfaces 2016; 140:11-18. [DOI: 10.1016/j.colsurfb.2015.12.025] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Revised: 12/03/2015] [Accepted: 12/14/2015] [Indexed: 01/17/2023]
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8
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Bornani K, Wang X, Davis JL, Wang X, Wang W, Hinestrosa JP, Mays JW, Kilbey SM. Impact of chain microstructure on solution and thin film self-assembly of PCHD-based semi-flexible/flexible diblock copolymers. SOFT MATTER 2015; 11:6509-6519. [PMID: 26186404 DOI: 10.1039/c5sm01245g] [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
Self-assembly of semi-flexible/flexible block copolymers in a selective solvent is examined using a set of diblock copolymers where the chain microstructure of the semi-flexible block is manipulated in order to tune chain stiffness. Conceptually, the reduced conformational space of the semi-flexible block is anticipated to alter the way the chains pack, potentially changing the structure of self-assembled aggregates in comparison to flexible diblock copolymer analogs. Semi-flexible/flexible diblock copolymers comprised of poly(styrene)-block-poly(1,3-cyclohexadiene) (PS-b-PCHD) having systematic changes in chain microstructure, as captured by the ratio of 1,4/1,2-linkages between cyclohexenyl repeat units, and molecular weight of the PCHD blocks were synthesized using anionic polymerization. These diblocks were dissolved in tetrahydrofuran (THF), which is a preferential solvent for PS, and the structures formed were examined using laser light scattering and complementary imaging techniques. Results show that PS-b-PCHD copolymers with a chain microstructure of 90% 1,4/10% 1,2 linkages between cyclohexenyl repeat units (referred to simply as 90/10) are able to micellize, forming spherical structures, while diblocks of 70/30 and 50/50 1,4-to-1,2 ratios remain as single chains and ill-defined aggregates, respectively, when dissolved in THF. With inferences drawn from simple structural models, we speculate that this self-assembly behavior arises due to the change in the chain configuration with increasing content of 1,2-links in the backbone. This renders the chain with higher 1,2 content incapable of swelling in response to solvent and unable to pack into well-defined self-assembled structures.
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Affiliation(s)
- Kamlesh Bornani
- Department of Chemistry, University of Tennessee, Knoxville, TN 37996, USA
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10
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Jia Y, Li J. Molecular assembly of Schiff Base interactions: construction and application. Chem Rev 2014; 115:1597-621. [PMID: 25543900 DOI: 10.1021/cr400559g] [Citation(s) in RCA: 286] [Impact Index Per Article: 28.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Yi Jia
- Beijing National Laboratory for Molecular Sciences, CAS Key Lab of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences , Beijing, 100190, China
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11
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Peng B, Chu X, Li Y, Li D, Chen Y, Zhao J. Adsorption kinetics and stability of poly(ethylene oxide)-block-polystyrene micelles on polystyrene surface. POLYMER 2013. [DOI: 10.1016/j.polymer.2013.08.064] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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12
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IIJIMA M, NAKAJIMA S. Preparation of Nanocapsules Formed from Temperature-Responsive Block Polymers Containing PEG. KOBUNSHI RONBUNSHU 2012. [DOI: 10.1295/koron.69.102] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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13
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Fares MM, Assaf SM, Jaber AA. Biodegradable amphiphiles of grafted poly(lactide) onto 2-hydroxyethyl methacrylate-co-N-vinylpyrrolidone copolymers as drug carriers. J Appl Polym Sci 2011. [DOI: 10.1002/app.34054] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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14
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Bahmani B, Gupta S, Upadhyayula S, Vullev VI, Anvari B. Effect of polyethylene glycol coatings on uptake of indocyanine green loaded nanocapsules by human spleen macrophages in vitro. JOURNAL OF BIOMEDICAL OPTICS 2011; 16:051303. [PMID: 21639563 DOI: 10.1117/1.3574761] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Near-infrared (NIR) optically active nanoparticles are promising exogenous chromophores for applications in medical imaging and phototherapy. Since nanoparticles can be rapidly eliminated from the body by cells of the reticuloendothelial system, a thriving strategy to increase their blood circulation time is through surface modification with polyethylene glycol (PEG). We constructed polymeric nanocapsules loaded with indocyanine green (ICG), an FDA-approved NIR dye, and coated with aldehyde-terminated PEG. Using optical absorbance spectroscopy and flow cytometry, we investigated the effect of PEG coating and molecular weight (MW) of PEG [5000 and 30,000 Daltons (Da)] on the phagocytic content of human spleen macrophages incubated with ICG-containing nanocapsules (ICG-NCs) between 15 to 360 min. Our results indicate that surface coating with PEG is an effective method to reduce the phagocytic content of ICG-NCs within macrophages for at least up to 360 min of incubation time. Coating the surface of ICG-NCs with the low MW PEG results in lower phagocytic content of ICG-NCs within macrophages for at least up to 60 min of incubation time as compared to ICG-NCs coated with the high MW PEG. Surface coating of ICG-NCs with PEG is a promising approach to prolong vasculature circulation time of ICG for NIR imaging and phototherapeutic applications.
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Affiliation(s)
- Baharak Bahmani
- Department of Bioengineering, University of California, Riverside, California 92521, USA
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Patrick AG, Ulijn RV. Hydrogels for the detection and management of protease levels. Macromol Biosci 2011; 10:1184-93. [PMID: 20593363 DOI: 10.1002/mabi.200900457] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The design of hydrogels that simultaneously report protease activity and remove excess protease from solution is elucidated. The hydrogels, based on amino-PEGA, combine enzyme-specific peptides flanked with FRET complimented by charged amino acid residues that facilitate protease uptake via short range electrostatic interactions. Enzymatic response was analysed using a combination of fluorescence spectroscopy, two-photon microscopy and UV/Vis spectroscopy. An optimised elastase-responsive hydrogel resulted in lowering of elastase levels below those typical of chronic wounds. The versatility of the modular-design approach was demonstrated by development of matrix metalloprotease and chymotrypsin sensitive systems.
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Affiliation(s)
- Alison G Patrick
- Materials Science Centre, School of Materials, The University of Manchester, Grosvenor Street, Manchester, UK
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Uchida Y, Murakami Y. Trilayered polymeric micelle: A newly developed macromolecular assembly that can incorporate hydrophilic compounds. Colloids Surf B Biointerfaces 2010; 79:198-204. [DOI: 10.1016/j.colsurfb.2010.03.047] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2010] [Revised: 03/28/2010] [Accepted: 03/31/2010] [Indexed: 10/19/2022]
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Jeon HJ, Go DH, Choi SY, Kim KM, Lee JY, Choo DJ, Yoo HO, Kim JM, Kim J. Synthesis of poly(ethylene oxide)-based thermoresponsive block copolymers by RAFT radical polymerization and their uses for preparation of gold nanoparticles. Colloids Surf A Physicochem Eng Asp 2008. [DOI: 10.1016/j.colsurfa.2007.11.033] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Sateesh A, Vogel J, Dayss E, Fricke B, Dölling K, Rothe U. Surface modification of medical-grade polyurethane by cyanurchloride-activated tetraether lipid (a new approach for bacterial antiadhesion). J Biomed Mater Res A 2008; 84:672-81. [PMID: 17635021 DOI: 10.1002/jbm.a.31345] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The surface of high-grade medical polyurethane was chemically modified and coated with tetraether lipid, employing cyanurchloride as coupling agent. The surfaces were initially grafted with hexamethylene diisocyanate and subsequently treated with water or hexamethylene diamine to generate free amino groups on the surface. This provides a convenient way for covalent coupling of tetraether lipids. These lipid-coated surfaces were investigated for bacterial adhesion using Pseudomonas aeruginosa. All lipid-coated surfaces significantly reduced bacterial adhesion. Surface topology and individual modification steps were controlled by contact angle measurements, attenuated total reflectance infrared spectroscopy, X-ray photoelectron spectroscopy, confocal laser scanning microscopy, and environmental scanning electron microscopy. This new surface modification approach may reduce the adhesion of bacteria on biomaterials.
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Affiliation(s)
- Ananthu Sateesh
- Institute of Bioengineering, Martin Luther University Halle-Wittenberg, Halle/Saale, Germany
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Murphy KA, Eisenhauer JM, Savin DA. Synthesis, self-assembly and adsorption of PEO–PLA block copolymers onto colloidal polystyrene. ACTA ACUST UNITED AC 2007. [DOI: 10.1002/polb.21361] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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20
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Synthesis of hydroxyl-capped comb-like poly(ethylene glycol) to develop shell cross-linkable micelles. POLYMER 2006. [DOI: 10.1016/j.polymer.2006.01.011] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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21
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Iijima M, Nagasaki Y. Synthesis of poly[N-isopropylacrylamide-g-poly(ethylene glycol)] with a reactive group at the poly(ethylene glycol) end and its thermosensitive self-assembling character. ACTA ACUST UNITED AC 2006. [DOI: 10.1002/pola.21264] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Zhang Y, Jin T, Zhuo RX. Methotrexate-loaded biodegradable polymeric micelles: Preparation, physicochemical properties and in vitro drug release. Colloids Surf B Biointerfaces 2005; 44:104-9. [PMID: 16039836 DOI: 10.1016/j.colsurfb.2005.06.004] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2005] [Revised: 06/04/2005] [Accepted: 06/16/2005] [Indexed: 11/24/2022]
Abstract
Polymeric micelles based on amphiphilic diblock copolymers methoxy poly(ethylene glycol)-polylactide with various hydrophobic lengths were designed as carriers of poorly water-soluble anticancer drug methotrexate (MTX). Relationship between physicochemical characteristics of micelles and release behavior was explored. The critical micelle concentration was determined by fluorescence spectroscopy using 9-chloromethyl anthracene as fluorescence probe. Core-shell type polymeric micelles were prepared by free-surfactant dialysis technique. The mean size of micelles loaded with MTX was 50-200 nm with narrow polydispersity. Physicochemical properties of drug-loaded micelles were evaluated. In vitro release behavior of MTX was also investigated. MTX was continuously released from micelles and less than 50% MTX was released in 5 days. Release rate was dependent on chemical structures of micelles and enhanced by decreasing polylactide lengths.
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Affiliation(s)
- Ying Zhang
- School of Pharmacy, Shanghai JiaoTong University, Shanghai 200030, China
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Functionalized micelles from new ABC polyglycidol-poly(ethylene oxide)-poly(d,l-lactide) terpolymers. POLYMER 2005. [DOI: 10.1016/j.polymer.2005.06.002] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Wu W, Matyjaszewski K, Kowalewski T. Monitoring surface thermal transitions of ABA triblock copolymers with crystalline segments using phase contrast tapping mode atomic force microscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2005; 21:1143-1148. [PMID: 15697250 DOI: 10.1021/la048460j] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Variable-temperature tapping mode atomic force microscopy was used to follow thermal transitions in nanoscale phase separated triblock copolymers containing partially crystalline poly(octadecyl methacrylate) or poly(docosyl methacrylate) and glassy (poly(tert-butyl acrylate)) segments. Melting/crystallization and devitrification/vitrification transitions in phase separated domains were followed with the aid of "phase shift thermograms" constructed from cantilever phase shift maps acquired at different temperatures. This type of analysis turned out to be particularly useful in following melting/crystallization and devitrification/vitrification transitions occurring in the same temperature range and thus difficult or impossible to resolve using differential scanning calorimetry.
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Carrillo A, Yanjarappa MJ, Gujraty KV, Kane RS. Biofunctionalized block copolymer nanoparticles based on ring-opening metathesis polymerization. ACTA ACUST UNITED AC 2005. [DOI: 10.1002/pola.21219] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Abstract
Nanoparticle drug carriers consist of solid biodegradable particles in size ranging from 10 to 1000 nm (50-300 nm generally). They cannot freely diffuse through the blood-brain barrier (BBB) and require receptor-mediated transport through brain capillary endothelium to deliver their content into the brain parenchyma. Polysorbate 80-coated polybutylcyanoacrylate nanoparticles can deliver drugs to the brain by a still debated mechanism. Despite interesting results these nanoparticles have limitations, discussed in this review, that may preclude, or at least limit, their potential clinical applications. Long-circulating nanoparticles made of methoxypoly(ethylene glycol)- polylactide or poly(lactide-co-glycolide) (mPEG-PLA/PLGA) have a good safety profiles and provide drug-sustained release. The availability of functionalized PEG-PLA permits to prepare target-specific nanoparticles by conjugation of cell surface ligand. Using peptidomimetic antibodies to BBB transcytosis receptor, brain-targeted pegylated immunonanoparticles can now be synthesized that should make possible the delivery of entrapped actives into the brain parenchyma without inducing BBB permeability alteration. This review presents their general properties (structure, loading capacity, pharmacokinetics) and currently available methods for immunonanoparticle preparation.
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Multi-layered nanoball as high performance permselective membrane. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2004. [DOI: 10.1016/j.msec.2004.08.050] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Gan D, Mueller A, Wooley KL. Amphiphilic and hydrophobic surface patterns generated from hyperbranched fluoropolymer/linear polymer networks: Minimally adhesive coatings via the crosslinking of hyperbranched fluoropolymers. ACTA ACUST UNITED AC 2003. [DOI: 10.1002/pola.10968] [Citation(s) in RCA: 100] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Vermette P, Meagher L. Interactions of phospholipid- and poly(ethylene glycol)-modified surfaces with biological systems: relation to physico-chemical properties and mechanisms. Colloids Surf B Biointerfaces 2003. [DOI: 10.1016/s0927-7765(02)00160-1] [Citation(s) in RCA: 191] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Lavasanifar A, Samuel J, Kwon GS. Poly(ethylene oxide)-block-poly(L-amino acid) micelles for drug delivery. Adv Drug Deliv Rev 2002; 54:169-90. [PMID: 11897144 DOI: 10.1016/s0169-409x(02)00015-7] [Citation(s) in RCA: 557] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Block copolymer micelles encapsulate water insoluble drugs by chemical and physical means, and they may target therapeutics to their site of action in a passive or active way. In this review, we focus on micelles self-assembled from poly(ethylene oxide)-block-poly(L-amino acid) (PEO-b-PLAA). A common theme in these studies is the chemical modification of the core-forming PLAA block used to adjust and optimize the properties of PEO-b-PLAA micelles for drug delivery. Micelle-forming block copolymer-drug conjugates, micellar nanocontainers and polyion complex micelles have been obtained that mimic functional aspects of biological carriers, namely, lipoproteins and viruses. PEO-b-PLAA micelles may be advantageous in terms of safety, stability, and scale-up.
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Affiliation(s)
- Afsaneh Lavasanifar
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, Alberta T6G 2N8, Canada
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31
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Abstract
A new class of diblock copolymers was synthesized from biodegradable poly(lactic acid) and poly(ethylene glycol)minus signmonoamine. These polymers were activated by covalently attaching linkers such as disuccinimidyl tartrate or disuccinimidyl succinate to the hydrophilic polymer chain. The polymers were characterized by (1)H NMR spectroscopy, (13)C NMR spectroscopy and gel permeation chromatography (GPC). These investigations indicated that the polymers were obtained with the correct composition, in high purities, and the expected molecular weight. By using dyes containing primary amine groups such as 5-aminoeosin as model substrates, it was possible to show that the polymers are able to bind such compounds covalently. The diblock copolymers were developed to suppress unspecific protein adsorption and allow the binding of bioactive molecules by instant surface modification. The polymers are intended to be used for tissue engineering applications where surface immobilized cell adhesion peptides or growth factors are needed to control cell behavior.
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Affiliation(s)
- Jörg K Tessmar
- Department of Pharmaceutical Technology, University of Regensburg, D-93040 Regensburg, Germany
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