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Yusa SI, Oka D, Iwasaki Y, Ishihara K. pH-Responsive Association Behavior of Biocompatible Random Copolymers Containing Pendent Phosphorylcholine and Fatty Acid. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:5119-5127. [PMID: 34672613 DOI: 10.1021/acs.langmuir.1c02200] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Well-defined pH-responsive biocompatible random copolymers composed of 2-(methacryloyloxy)ethyl phosphorylcholine and varying quantities of sodium 11-(acrylamido)undecanoate (AaU) (fAaU = 0-58 mol %) were synthesized via reversible addition-fragmentation chain transfer radical polymerization. The pH-responsive association and dissociation behavior of the random copolymers was studied via turbidity, 1H nuclear magnetic resonance relaxation time, dynamic light scattering, static light scattering (SLS), and fluorescence measurements. At basic pH levels, the random copolymers dissolved in water in a unimer state because the AaU units behaved in a hydrophilic manner as a result of the ionization of the pendent fatty acids. The random copolymers with fAaU < 52 mol % associated intramolecularly within a single polymer chain to form unimer micelles at pH 3 because of the protonation of the pendent fatty acids. On the other hand, the random copolymer with fAaU ≥ 52 mol % formed intermolecular aggregates composed of four polymer chains at pH 3, as established by the SLS measurements. The random copolymers displayed the ability to solubilize hydrophobic guest molecules, such as N-phenyl-1-naphthylamine, into the hydrophobic microdomain formed by the pendent dehydrated fatty acids at acidic pHs. At pH 4, 1-pyrememethanol is captured by the random copolymer with fAaU = 52 mol %, and it is released from the random copolymer above pH 9. Furthermore, the mucoadhesive properties of the random copolymer with fAaU = 9 mol % were studied using a surface plasmon resonance technique. The copolymer was adsorbed onto mucin at pH 3; however, the adsorption decreased at pH 7.4.
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Affiliation(s)
- Shin-Ichi Yusa
- Department of Materials Science and Chemistry, Graduate School of Engineering, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2280, Japan
| | - Daishiro Oka
- Department of Materials Science and Chemistry, Graduate School of Engineering, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2280, Japan
| | - Yasuhiko Iwasaki
- Faculty of Chemistry, Materials and Bioengineering, Kansai University, 3-3-35 Yamate-cho, Suita-shi, Osaka 564-8680, Japan
- Organization for Research and Development of Innovative Science and Technology, Kansai University, 3-3-35 Yamate-cho, Suita-shi, Osaka 564-8680, Japan
| | - Kazuhiko Ishihara
- Department of Materials Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
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Cao Y, Cheng Y, Zhao G. Near-Infrared Light-, Magneto-, and pH-Responsive GO-Fe 3O 4/Poly( N-isopropylacrylamide)/alginate Nanocomposite Hydrogel Microcapsules for Controlled Drug Release. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:5522-5530. [PMID: 33929865 DOI: 10.1021/acs.langmuir.1c00207] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Responsive hydrogels have found widespread applications in biomedical science and engineering fields, especially for drug delivery. Despite the superior performance of responsive hydrogels, challenges still exist in drug-delivery efficiency when environmental stimuli are weak. Recently, the demand in the design of hydrogel-based drug delivery systems has stimulated considerable interest in the search for new strategies, for instance, the application of nanocomposite hydrogels for reinforcing the versatility and flexibility in controlled drug delivery. In this study, a novel and effective nanocomposite hydrogel microcapsule drug delivery system, which is composed of poly(N-isopropylacrylamide) (PNIPAM) and alginate interpenetrating polymer and GO-Fe3O4 nanomaterials, is developed to achieve NIR light-, magneto-, and pH-responsive drug release. The GO-Fe3O4 nanomaterials embedded in the interpenetrating polymer enable the PNIPAM hydrogel deswelling by raising temperature above the lower critical solution temperature under NIR light and alternating magnetic field, thus accelerating the release of doxorubicin. In addition, the introduction of alginate into PNIPAM hydrogels endows nanocomposite hydrogels (NCHs) with quick gelation property, enhanced mechanical property, and pH-responsive performance. The in vitro cytotoxicity assay confirmed that the NCH platform can effectively kill the cancer cells. This novel multiresponsive drug delivery system holds great promise for the treatment of diseases.
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Affiliation(s)
- Yuan Cao
- Department of Electronic Science and Technology, University of Science and Technology of China, Hefei, Anhui 230027, China
| | - Yue Cheng
- Department of Electronic Science and Technology, University of Science and Technology of China, Hefei, Anhui 230027, China
| | - Gang Zhao
- Department of Electronic Science and Technology, University of Science and Technology of China, Hefei, Anhui 230027, China
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Sun X, Huang J, Zeng H, Wu J. Protein-Resistant Property of Egg White Ovomucin under Different pHs and Ionic Strengths. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:11034-11042. [PMID: 30277391 DOI: 10.1021/acs.jafc.8b03905] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Ovomucin is a mucin-type glycoprotein accounting for 3.5% (w/w) of total egg white proteins. The purpose of the study was to explore the potential of ovomucin as a protein-resistant material. Using bovine serum albumin (BSA) as a model protein, ovomucin decreased the fluorescence intensities of the adsorbed BSA from 10.90 ± 2.18 to 0.67 ± 0.75, indicating its protein-resistant property. To understand the underlying mechanism, pure repulsive forces between ovomucin and model proteins (e.g., BSA and ovomucin) at various pHs (2.0, 6.0, and 7.2) and ionic strengths (0.1, 10, and 150 mM NaCl) were measured using a surface forces apparatus. Further studies by using atomic force microscope imaging, zeta potential, and dynamic light scattering suggested that the protein-resistant property of ovomucin was mainly attributed to strong electrostatic and steric repulsions between protein layers. This work has demonstrated that ovomucin has antifouling potential with broad applications in the areas of food processing industry and biomedical implants.
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Affiliation(s)
- Xiaohong Sun
- Department of Agricultural, Food & Nutritional Science , University of Alberta , Edmonton , Alberta T6G 2P5 , Canada
- College of Food and Biological Engineering , Qiqihar University , Qiqihar , Heilongjiang 161006 , China
| | - Jun Huang
- Chemical and Materials Engineering , University of Alberta , Edmonton , Alberta T6G 2 V4 , Canada
| | - Hongbo Zeng
- Chemical and Materials Engineering , University of Alberta , Edmonton , Alberta T6G 2 V4 , Canada
| | - Jianping Wu
- Department of Agricultural, Food & Nutritional Science , University of Alberta , Edmonton , Alberta T6G 2P5 , Canada
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Cook MT, Khutoryanskiy VV. Mucoadhesion and mucosa-mimetic materials—A mini-review. Int J Pharm 2015; 495:991-8. [DOI: 10.1016/j.ijpharm.2015.09.064] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2015] [Revised: 09/08/2015] [Accepted: 09/28/2015] [Indexed: 10/22/2022]
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5
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Zhou H, Xun R, Liu Q, Fan H, Liu Y. Preparation of Thermal and pH Dually Sensitive Polyurethane Membranes and Their Properties. J MACROMOL SCI B 2014. [DOI: 10.1080/00222348.2013.845059] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Wei W, Juan-juan D, Jie L, Yang L, Ming Y, Jing Z, Zu-ming H. FABRICATION OF THERMOSENSITIVE PROTEIN NANOCAPSULES <I>via</I> PRECIPITATION POLYMERIZATION. ACTA POLYM SIN 2013. [DOI: 10.3724/sp.j.1105.2013.12294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Meier-Koll A, Pipich V, Busch P, Papadakis CM, Müller-Buschbaum P. Phase separation in semidilute aqueous poly(N-isopropylacrylamide) solutions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:8791-8798. [PMID: 22607150 DOI: 10.1021/la3015332] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The phase separation mechanism in semidilute aqueous poly(N-isopropylacrylamide) (PNIPAM) solutions is investigated with small-angle neutron scattering (SANS). The nature of the phase transition is probed in static SANS measurements and with time-dependent SANS measurements after a temperature jump. The observed critical exponents of the phase transition describing the temperature dependence of the Ornstein-Zernike amplitude and correlation length are smaller than values from mean-field theory. Time-dependent SANS measurements show that the specific surface decreases with increasing time after a temperature jump above the phase transition. Thus, the formation of additional hydrogen bonds in the collapsed state is a kinetic effect: A certain fraction of water remains as bound water in the system. Moreover, H-D exchange reactions observed in PNIPAM have to be taken into account.
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Affiliation(s)
- Andreas Meier-Koll
- Physik-Department, Lehrstuhl für Funktionelle Materialien/Physik Weicher Materie, Technische Universität München, James-Franck-Str.1, 85748 Garching, Germany
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Drachuk I, Shchepelina O, Lisunova M, Harbaugh S, Kelley-Loughnane N, Stone M, Tsukruk VV. pH-responsive layer-by-layer nanoshells for direct regulation of cell activity. ACS NANO 2012; 6:4266-4278. [PMID: 22489604 DOI: 10.1021/nn3008355] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Saccharomyces cerevisiae yeast cells encapsulated with pH-responsive synthetic nanoshells from lightly cross-linked polymethacrylic acid showed a high viability rate of around 90%, an indication of high biocompatibility of synthetic pH-responsive shells. We demonstrated that increasing pH above the isoelectric point of the polymer shell leads to a delay in growth rate; however, it does not affect the expression of enhanced green fluorescent protein. We suggest that progressive ionization and charge accumulation within the synthetic shells evoke a structural change in the outer shells which affect the membrane transport. This change facilitates the ability to manipulate growth kinetics and functionality of the cells with the surrounding environment. We observed that hollow layer-by layer nanoshells showed a remarkable degree of reversible swelling/deswelling over a narrow pH range (pH 5.0-6.0), but their assembly directly on the cell surface resulted in the suppression of large dimensional changes. We suggest that the variation in surface charges caused by deprotonation/protonation of carboxylic groups in the nanoshells controlled cell growth and cell function, which can be utilized for external chemical control of cell-based biosensors.
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Affiliation(s)
- Irina Drachuk
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
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Zoppe JO, Österberg M, Venditti RA, Laine J, Rojas OJ. Surface Interaction Forces of Cellulose Nanocrystals Grafted with Thermoresponsive Polymer Brushes. Biomacromolecules 2011; 12:2788-96. [DOI: 10.1021/bm200551p] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Justin O. Zoppe
- Department of Forest Biomaterials, North Carolina State University, Campus Box 8005, Raleigh, North Carolina, United States
| | - Monika Österberg
- Department of Forest Products Technology, School of Chemical Technology, Aalto University, P.O. Box 16300, Aalto FIN-00076, Finland
| | - Richard A. Venditti
- Department of Forest Biomaterials, North Carolina State University, Campus Box 8005, Raleigh, North Carolina, United States
| | - Janne Laine
- Department of Forest Products Technology, School of Chemical Technology, Aalto University, P.O. Box 16300, Aalto FIN-00076, Finland
| | - Orlando J. Rojas
- Department of Forest Biomaterials, North Carolina State University, Campus Box 8005, Raleigh, North Carolina, United States
- Department of Forest Products Technology, School of Chemical Technology, Aalto University, P.O. Box 16300, Aalto FIN-00076, Finland
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Estillore NC, Park JY, Advincula RC. Langmuir−Schaefer (LS) Macroinitiator Film Control on the Grafting of a Thermosensitive Polymer Brush via Surface Initiated-ATRP. Macromolecules 2010. [DOI: 10.1021/ma100726z] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nicel C. Estillore
- Department of Chemistry and Department of Chemical Engineering, University of Houston, Houston, Texas 77204-5003
| | - Jin Young Park
- Department of Chemistry and Department of Chemical Engineering, University of Houston, Houston, Texas 77204-5003
| | - Rigoberto C. Advincula
- Department of Chemistry and Department of Chemical Engineering, University of Houston, Houston, Texas 77204-5003
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Wang N, Ru G, Wang L, Feng J. 1H MAS NMR studies of the phase separation of poly(N-isopropylacrylamide) gel in binary solvents. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:5898-5902. [PMID: 19334692 DOI: 10.1021/la8038363] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Preferential interactions of solvents with poly(N-isopropylacrylamide) (PNIPAM) gel networks in binary water/alcohol (water/methanol and water/ethanol) mixtures have been investigated using variable-temperature high-resolution 1H MAS NMR. NMR results for PNIPAM gel in the binary solvents reveal the existence of two distinct types of water/alcohol mixtures above the LCST: confined binary solvents bound inside the gel, and free binary solvents expelled from the gel. It is interesting to find that the alcohol concentration in confined solution is significantly higher than that in free solution. Moreover, of the two alcohols, ethanol is more significantly concentrated in the confined solution. These results demonstrate that the polymer preferentially interacts with alcohol molecules over water and that the alcohol with higher hydrophobicity exhibits higher preferential absorption on PNIPAM. Our results also show that 1H NMR measurements made on two distinct types of solution provide a convenient, direct means of characterizing the preferential adsorption of solvent on polymer.
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Affiliation(s)
- Nian Wang
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Science, Wuhan 430071, PR China
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Synthesis, characterization and self-assembly behavior in water as fluorescent sensors of cationic water-soluble conjugated polyfluorene-b-poly(N-isopropylacrylamide) diblock copolymers. POLYMER 2009. [DOI: 10.1016/j.polymer.2008.12.026] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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13
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Guo X, Yin W, Sun X, Huang X, Lu T. Study on interaction between Eu(III) and thermosensitive microsphere. Polym Bull (Berl) 2008. [DOI: 10.1007/s00289-008-0017-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Yakubov GE, Papagiannopoulos A, Rat E, Waigh TA. Charge and interfacial behavior of short side-chain heavily glycosylated porcine stomach mucin. Biomacromolecules 2007; 8:3791-9. [PMID: 17979238 DOI: 10.1021/bm700721c] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
The current accepted model for high-molecular-weight gastric mucins of the MUC family is that they adopt a polydisperse coil conformation in bulk solutions. We develop this model using well-characterized highly purified porcine gastric mucin and examine the molecules' charge and interfacial adsorption. "Orthana" mucin has short side-chains, low levels of sialic acid residues, and includes minute amounts of cystine residues that can be responsible for the self-polymerization of mucin. Atomic force microscopy and transmission electron microscopy are used to examine the interfacial behavior of the mucin and clearly demonstrate the existence of discrete spherical subunits within the mucin molecules, with sizes in agreement with static light scattering, dynamic light scattering, and zeta potential measurements. Furthermore images indicate the combs are assembled with a beads on a string conformation; the daisy chain model. Zeta potential measurements establish the polyampholyte nature of the mucin molecules, which is used to explain their adsorption behavior on similarly charged surfaces.
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Affiliation(s)
- Gleb E Yakubov
- Unilever Corporate Research, Colworth Park, Sharnbrook, Beds MK44 1LQ, United Kingdom.
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Guo X, Chen M, Lu T, Huang X. Effect of Tb(III) on the properties of P(NIPAM-co-St) copolymer microspheres. JOURNAL OF POLYMER RESEARCH 2007. [DOI: 10.1007/s10965-007-9153-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Zhang Q, Zha L, Ma J, Liang B. A Novel Route to the Preparation of Poly(N-isopropylacrylamide) Microgels by Using Inorganic Clay as a Cross-Linker. Macromol Rapid Commun 2007. [DOI: 10.1002/marc.200600629] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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McCormick CL, Kirkland SE, York AW. Synthetic Routes to Stimuli‐Responsive Micelles, Vesicles, and Surfaces via Controlled/Living Radical Polymerization∗. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/15583720600945428] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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18
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Enhancement of poly(ethylene glycol) mucoadsorption by biomimetic end group functionalization. Biointerphases 2006; 1:134-41. [DOI: 10.1116/1.2422894] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Chayed S, Winnik FM. In vitro evaluation of the mucoadhesive properties of polysaccharide-based nanoparticulate oral drug delivery systems. Eur J Pharm Biopharm 2006; 65:363-70. [PMID: 17055713 DOI: 10.1016/j.ejpb.2006.08.017] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2006] [Revised: 08/22/2006] [Accepted: 08/24/2006] [Indexed: 10/24/2022]
Abstract
Impedance quartz crystal microbalance (QCM) and surface plasmon resonance (SPR) measurements were performed in order to assess the mucoadhesive properties of hydrophobically modified (HM) derivatives of dextran (DEX), with an average molecular weight of 10,000 Da, and of hydroxypropylcellulose (HPC), with an average molecular weight of 80,000 Da. The measurements involved (1) treatment of a hydrophobic surface with bovine submaxillary gland mucin (BSM) under various pH conditions (2.0-8.0) and (2) treatment of the BSM layer with buffer solutions of the amphiphilic polysaccharides (pH 3.0 and 7.0). Control measurements were carried out with DEX, HPC, and chitosan (CH) used as a model mucoadhesive polymer. All HM-polysaccharides were shown to adsorb onto a BSM layer, the extent of adsorption increasing with increasing hydrophobicity of the samples. Under the same conditions, HPC and CH interacted with the BSM layer, but DEX showed no affinity to BSM. All the results suggest that HM-polysaccharide micellar systems have the potential of enhancing the bioavailability of poorly adsorbed drugs in peroral delivery.
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Affiliation(s)
- Siwar Chayed
- Faculty of Pharmacy and Department of Chemistry, University of Montreal, Montreal, QC, Canada
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Li G, Shi L, An Y, Zhang W, Ma R. Double-responsive core–shell–corona micelles from self-assembly of diblock copolymer of poly(t-butyl acrylate-co-acrylic acid)-b-poly(N-isopropylacrylamide). POLYMER 2006. [DOI: 10.1016/j.polymer.2006.04.041] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Duan Q, Miura Y, Narumi A, Shen X, Sato SI, Satoh T, Kakuchi T. Synthesis and thermoresponsive property of end-functionalized poly(N-isopropylacrylamide) with pyrenyl group. ACTA ACUST UNITED AC 2005. [DOI: 10.1002/pola.21208] [Citation(s) in RCA: 107] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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