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Albuzat T, Keil M, Ellis J, Alexander C, Wenz G. Transfection of luciferase DNA into various cells by cationic cyclodextrin polyrotaxanes derived from ionene-11. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm16425f] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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2
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Affiliation(s)
- Akira Harada
- Department of Macromolecular Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
| | - Akihito Hashidzume
- Department of Macromolecular Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
| | - Hiroyasu Yamaguchi
- Department of Macromolecular Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
| | - Yoshinori Takashima
- Department of Macromolecular Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
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Sun S, Chen X, Liu J, Yan J, Fang Y. A novel two-component physical gel based on interaction between poly(acrylic acid) and 6-deoxy-6-amino-β-cyclodextrin. POLYM ENG SCI 2008. [DOI: 10.1002/pen.21225] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Liu Y, Li CJ, Guo DS, Pan ZH, Li Z. A Comparative Study of Complexation of β-Cyclodextrin, Calix[4]arenesulfonate and Cucurbit[7]uril with Dye Guests: Fluorescence Behavior and Binding Ability. Supramol Chem 2007. [DOI: 10.1080/10610270601145444] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Yu Liu
- a State Key Laboratory of Elemento-Organic Chemistry, Department of Chemistry , Nankai University , Tianjin, 300071, P. R. China
| | - Chun-Ju Li
- a State Key Laboratory of Elemento-Organic Chemistry, Department of Chemistry , Nankai University , Tianjin, 300071, P. R. China
| | - Dong-Sheng Guo
- a State Key Laboratory of Elemento-Organic Chemistry, Department of Chemistry , Nankai University , Tianjin, 300071, P. R. China
| | - Zhong-Huai Pan
- a State Key Laboratory of Elemento-Organic Chemistry, Department of Chemistry , Nankai University , Tianjin, 300071, P. R. China
| | - Zhe Li
- a State Key Laboratory of Elemento-Organic Chemistry, Department of Chemistry , Nankai University , Tianjin, 300071, P. R. China
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Choi HS, Takahashi A, Ooya T, Yui N. Molecular-recognition and binding properties of cyclodextrin-conjugated polyrotaxanes. Chemphyschem 2007; 7:1668-70. [PMID: 16807959 DOI: 10.1002/cphc.200600147] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Hak Soo Choi
- School of Materials Science and the 21st Century COE Program, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan
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Choi HS, Hirasawa A, Ooya T, Kajihara D, Hohsaka T, Yui N. pH-Sensitive Locomotion of Cyclodextrins in a Block–Selective Mobile Polyrotaxane. Chemphyschem 2006; 7:1671-3. [PMID: 16832804 DOI: 10.1002/cphc.200600242] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Hak Soo Choi
- School of Materials Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan
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Choi HS, Ooya T, Yui N. One-Pot Synthesis of a Polyrotaxane via Selective Threading of a PEI-b-PEG-b-PEI Copolymer. Macromol Biosci 2006; 6:420-4. [PMID: 16761273 DOI: 10.1002/mabi.200600024] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
A functional polyrotaxane of a PEI-b-PEG-b-PEI copolymer is synthesized in aqueous solution in a one-pot sequence. To obtain a polyrotaxane with PEG-block-selective inclusion complexes, the solution pH of the polypseudorotaxane is lowered to 4.4 in the presence of 9-anthraldehyde (AN), which triggers the expulsion of the alpha-cyclodextrins (alpha-CDs) from the flank PEI chains. Synthetic strategy of a block-selective polyrotaxane between a PEI-b-PEG-b-PEI copolymer and alpha-cyclodextrins.
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Affiliation(s)
- Hak Soo Choi
- School of Materials Science and the 21st Century COE Program, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan
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Affiliation(s)
- Gerhard Wenz
- Organische Makromolekulare Chemie, Saarland University, Geb. C4.2, D-66123 Saarbrücken, Germany.
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Choi HS, Yamashita A, Ooya T, Yui N, Akita H, Kogure K, Ito R, Harashima H. Sunflower-shaped cyclodextrin-conjugated poly(epsilon-lysine) polyplex as a controlled intracellular trafficking device. Chembiochem 2006; 6:1986-90. [PMID: 16222730 DOI: 10.1002/cbic.200500242] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Hak Soo Choi
- School of Materials Science and the 21st Century COE Program, Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan
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10
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Choi HS, Yui N. Design of rapidly assembling supramolecular systems responsive to synchronized stimuli. Prog Polym Sci 2006. [DOI: 10.1016/j.progpolymsci.2005.09.002] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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11
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Choi HS, Yamamoto K, Ooya T, Yui N. Synthesis of Poly(ɛ-lysine)-Grafted Dextrans and Their pH- and Thermosensitive Hydrogelation with Cyclodextrins. Chemphyschem 2005; 6:1081-6. [PMID: 15937894 DOI: 10.1002/cphc.200400598] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
To give pH sensitivity to a thermoreversible supramolecular-structured hydrogel system, poly(epsilon-lysine) (PL), as a cationic polymer, was grafted to dextran and used for inclusion complexation with alpha-cyclodextrins (alpha-CDs). The synthesized graft copolymer was characterized by 1H NMR spectroscopy, and the hydrogel formation was confirmed by X-ray diffraction and solid-state 13C NMR analysis. The hydrogelation was induced from a phase-separated structure of hydrated dextrans and hydrophobically aggregated inclusion complexes in buffer solution at pH 10.0. The prepared hydrogels showed thermoreversible gel-sol transitions as well as pH-sensitive phase transitions, which were recorded by the changes in UV/Vis transmittance. A rapid phase transition from gel to sol was observed upon decreasing the pH value to 4.0, which resulted from the dissociation process between the protonated guest polymer and alpha-CDs. The stimuli-responsive physical properties of the hydrogels were improved by modulating the degree of substitution of the grafted PL and the combination with alpha-CDs.
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Affiliation(s)
- Hak Soo Choi
- School of Materials Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Tatsunokuchi, Ishikawa 923-1292, Japan
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Abstract
New associative pH sensitive systems composed of a modified dextran bearing 2-carboxycyclohexyl carboxyl groups and neutral (p betaCD) or positively charged (p betaCDN(+))beta-cyclodextrin-co-epichlorhydrin copolymers have been synthesized and their properties were investigated as a function of pH by phase diagrams and viscosimetry. The affinity between the CD cavities and the hydrophobic guests (2-carboxycyclohexyl carboxyl groups) has been studied as a function of pH. The system with the neutral p betaCD shows a pH dependent behavior due to the lowest affinity of the guest at pH above 5 for the cavity. Associative phase separation is produced at low pH whereas soluble complexes occur at higher pH. The opposite trend is observed with the system containing the cationic p betaCDN(+). This behavior is due to the combination of electrostatic and inclusion complex interactions in this system. Addition of salt, by screening the electrostatic interactions, also strongly influences the response of the system.
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Affiliation(s)
- Noëlle Martine Gosselet
- Laboratoire de Recherche sur les Polymères, U. M. C7581, CNRS, 2-8 rue Henri Dunant, 94320 Thiais, France.
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Choi HS, Ooya T, Huh KM, Yui N. pH-Triggered Changes in Assembling Properties of β-Cyclodextrin-Conjugated Poly(ε-lysine) Complexes. Biomacromolecules 2005; 6:1200-4. [PMID: 15877334 DOI: 10.1021/bm0400729] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hak Soo Choi
- School of Materials Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Tatsunokuchi, Ishikawa 923-1292, Japan
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Choi HS, Takahashi A, Ooya T, Yui N. Structural Role of Guest Molecules in Rapid and Sensitive Supramolecular Assembling System Based on β-Cyclodextrin-Conjugated Poly(ε-lysine). Macromolecules 2004. [DOI: 10.1021/ma0487610] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hak Soo Choi
- School of Materials Science and the 21st Century COE Program, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Tatsunokuchi, Ishikawa 923-1292, Japan
| | - Akihiro Takahashi
- School of Materials Science and the 21st Century COE Program, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Tatsunokuchi, Ishikawa 923-1292, Japan
| | - Tooru Ooya
- School of Materials Science and the 21st Century COE Program, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Tatsunokuchi, Ishikawa 923-1292, Japan
| | - Nobuhiko Yui
- School of Materials Science and the 21st Century COE Program, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Tatsunokuchi, Ishikawa 923-1292, Japan
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