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Mariano M, Bernardinelli OD, Pires-Oliveira R, Ferreira GA, Loh W. Inclusion Complexation between α-Cyclodextrin and Oligo(ethylene glycol) Methyl Ether Methacrylate. ACS OMEGA 2020; 5:9517-9528. [PMID: 32363304 PMCID: PMC7191851 DOI: 10.1021/acsomega.0c00741] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Accepted: 04/01/2020] [Indexed: 05/05/2023]
Abstract
The preparation of inclusion complexes based on α-cyclodextrin (α-CD) and oligo(ethylene glycol) methyl ether methacrylate (OEGMA) was investigated aiming to reveal complexation particularities and thermodynamic and kinetic aspects as a function of the oligomer architecture. Small-angle X-ray scattering and isothermal titration calorimetry measurements revealed that oligomer molecular weight controls both the kinetics and thermodynamics of inclusion. Unlike linear ethylene glycol polymers, OEGMA groups possess a methacrylate group, which seems to act as a stopper, affecting their mode of complexation. Nuclear magnetic resonance spectra and relaxation measurements support the fact that methacrylate groups lie outside the α-CD ring and that a full sequential complexation of the oligomer ethylene oxide groups is not observed. These results allied to the temperature sensitivity of these oligomers and enable possible routes for chemical modifications and design of new stimuli-responsive materials.
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Domiński A, Konieczny T, Kurcok P. α-Cyclodextrin-Based Polypseudorotaxane Hydrogels. MATERIALS (BASEL, SWITZERLAND) 2019; 13:E133. [PMID: 31905603 PMCID: PMC6982288 DOI: 10.3390/ma13010133] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 12/18/2019] [Accepted: 12/19/2019] [Indexed: 12/26/2022]
Abstract
Supramolecular hydrogels that are based on inclusion complexes between α-cyclodextrin and (co)polymers have gained significant attention over the last decade. They are formed via dynamic noncovalent bonds, such as host-guest interactions and hydrogen bonds, between various building blocks. In contrast to typical chemical crosslinking (covalent linkages), supramolecular crosslinking is a type of physical interaction that is characterized by great flexibility and it can be used with ease to create a variety of "smart" hydrogels. Supramolecular hydrogels based on the self-assembly of polypseudorotaxanes formed by a polymer chain "guest" and α-cyclodextrin "host" are promising materials for a wide range of applications. α-cyclodextrin-based polypseudorotaxane hydrogels are an attractive platform for engineering novel functional materials due to their excellent biocompatibility, thixotropic nature, and reversible and stimuli-responsiveness properties. The aim of this review is to provide an overview of the current progress in the chemistry and methods of designing and creating α-cyclodextrin-based supramolecular polypseudorotaxane hydrogels. In the described systems, the guests are (co)polymer chains with various architectures or polymeric nanoparticles. The potential applications of such supramolecular hydrogels are also described.
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Affiliation(s)
| | | | - Piotr Kurcok
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences, 34, M. Curie-Sklodowskiej St., 41-819 Zabrze, Poland; (A.D.); (T.K.)
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Serres-Gómez M, González-Gaitano G, Kaldybekov DB, Mansfield EDH, Khutoryanskiy VV, Isasi JR, Dreiss CA. Supramolecular Hybrid Structures and Gels from Host-Guest Interactions between α-Cyclodextrin and PEGylated Organosilica Nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:10591-10602. [PMID: 30095271 DOI: 10.1021/acs.langmuir.8b01744] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Polypseudorotaxanes are polymer chains threaded by molecular rings that are free to unthread; these "pearl-necklace" can self-assemble further, leading to higher-order supramolecular structures with interesting functionalities. In this work, the complexation between α-cyclodextrin (α-CD), a cyclic oligosaccharide of glucopyranose units, and poly(ethylene glycol) (PEG) grafted to silica nanoparticles was studied. The threading of α-CD onto the polymeric chains leads to their aggregation into bundles, followed by either the precipitation of the inclusion complex or the formation of a gel phase, in which silica nanoparticles are incorporated. The kinetics of threading, followed by turbidimetry, revealed a dependence of the rate of complexation on the following parameters: the concentration of α-CD, temperature, PEG length (750, 4000, and 5000 g mol-1), whether the polymer is grafted or free in solution, and the density of grafting. Complexation is slower, and temperature has a higher impact on PEG grafted on silica nanoparticles compared to PEG free in solution. Thermodynamic parameters extracted from the transition-state theory showed that inclusion complex formation is favored with grafted PEG compared to free PEG and establishes a ratio of complexation of five to six ethylene oxide units per cyclodextrin. The complexation yields, determined by gravimetry, revealed that much higher yields are obtained with longer chains and higher grafting density. Thermogravimetric analysis and Fourier transform infrared spectroscopy on the inclusion complex corroborate the number of macrocycles threaded on the chains. A sol-gel transition was observed with the longer PEG chain (5k) at specific mixing ratios; oscillatory shear rheology measurements confirmed a highly solid-like behavior, with an elastic modulus G' of up to 25 kPa, higher than that in the absence of silica. These results thus provide the key parameters dictating inclusion complex formation between cyclodextrin and PEG covalently attached to colloidal silica and demonstrate a facile route toward soft nanoparticle gels based on host-guest interactions.
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Affiliation(s)
- Mariana Serres-Gómez
- Department of Chemistry , University of Navarra , 31080 Pamplona , Spain
- Institute of Pharmaceutical Science, School of Cancer & Pharmaceutical Sciences , King's College London , Franklin-Wilkins Building, 150 Stamford Street , SE1 9NH London , U.K
| | | | - Daulet B Kaldybekov
- Reading School of Pharmacy , University of Reading , Whiteknights, P.O. Box 224, RG6 6AD Reading , U.K
- Faculty of Chemistry and Chemical Technology , Al-Farabi Kazakh National University , Almaty 050040 , Kazakhstan
| | - Edward D H Mansfield
- Reading School of Pharmacy , University of Reading , Whiteknights, P.O. Box 224, RG6 6AD Reading , U.K
| | - Vitaliy V Khutoryanskiy
- Reading School of Pharmacy , University of Reading , Whiteknights, P.O. Box 224, RG6 6AD Reading , U.K
| | - José Ramón Isasi
- Department of Chemistry , University of Navarra , 31080 Pamplona , Spain
| | - Cécile A Dreiss
- Institute of Pharmaceutical Science, School of Cancer & Pharmaceutical Sciences , King's College London , Franklin-Wilkins Building, 150 Stamford Street , SE1 9NH London , U.K
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Taneda H, Shundo A, Matsuno H, Tanaka K. Design of a Well-Defined Polyrotaxane Structure on a Glassy Polymer Surface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:709-714. [PMID: 28945378 DOI: 10.1021/acs.langmuir.7b03130] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
The polymer dynamics at the water interface play a crucial role in the manifestation of biorelated functions. One of the strategies for this is to form inclusion complexes of polymer chains with cyclic compounds. However, such an idea has been limited to bulk materials so far. Here we propose a preparation pathway for a polyrotaxane structure composed of poly(ethylene oxide) (PEO) and α-cyclodextrin (CD) at the outermost surface of a glassy poly(methyl methacrylate) film on the basis of the combination of a click reaction and the Langmuir-Blodgett method. The chain motion of PEO at the water interface could be regulated by threading of CD molecules on PEO and thereby the biological responses such as protein adsorption and platelet adhesion altered depending on the extent of complexation.
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Affiliation(s)
- Hidenobu Taneda
- Department of Applied Chemistry, Kyushu University , Fukuoka 819-0395, Japan
| | - Atsuomi Shundo
- Department of Applied Chemistry, Kyushu University , Fukuoka 819-0395, Japan
- Department of Automotive Science, Kyushu University , Fukuoka 819-0395, Japan
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University , Fukuoka 819-0395, Japan
| | - Hisao Matsuno
- Department of Applied Chemistry, Kyushu University , Fukuoka 819-0395, Japan
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University , Fukuoka 819-0395, Japan
| | - Keiji Tanaka
- Department of Applied Chemistry, Kyushu University , Fukuoka 819-0395, Japan
- Department of Automotive Science, Kyushu University , Fukuoka 819-0395, Japan
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University , Fukuoka 819-0395, Japan
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Furuya T, Koga T. Theoretical study of inclusion complex formation of cyclodextrin and single polymer chain. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.10.031] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Takahashi S, Yamada NL, Ito K, Yokoyama H. Inclusion Complex of α-Cyclodextrin with Poly(ethylene glycol) Brush. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b01238] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Shoko Takahashi
- Graduate
School of Frontier Sciences, The University of Tokyo, Chiba 277-8561, Japan
| | | | - Kohzo Ito
- Graduate
School of Frontier Sciences, The University of Tokyo, Chiba 277-8561, Japan
| | - Hideaki Yokoyama
- Graduate
School of Frontier Sciences, The University of Tokyo, Chiba 277-8561, Japan
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Zheng Y, Wyman IW. Supramolecular Nanostructures Based on Cyclodextrin and Poly(ethylene oxide): Syntheses, Structural Characterizations and Applications for Drug Delivery. Polymers (Basel) 2016; 8:E198. [PMID: 30979290 PMCID: PMC6431930 DOI: 10.3390/polym8050198] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Revised: 05/10/2016] [Accepted: 05/10/2016] [Indexed: 11/16/2022] Open
Abstract
Cyclodextrins (CDs) have been extensively studied as drug delivery carriers through host⁻guest interactions. CD-based poly(pseudo)rotaxanes, which are composed of one or more CD rings threading on the polymer chain with or without bulky groups (or stoppers), have attracted great interest in the development of supramolecular biomaterials. Poly(ethylene oxide) (PEO) is a water-soluble, biocompatible polymer. Depending on the molecular weight, PEO can be used as a plasticizer or as a toughening agent. Moreover, the hydrogels of PEO are also extensively studied because of their outstanding characteristics in biological drug delivery systems. These biomaterials based on CD and PEO for controlled drug delivery have received increasing attention in recent years. In this review, we summarize the recent progress in supramolecular architectures, focusing on poly(pseudo)rotaxanes, vesicles and supramolecular hydrogels based on CDs and PEO for drug delivery. Particular focus will be devoted to the structures and properties of supramolecular copolymers based on these materials as well as their use for the design and synthesis of supramolecular hydrogels. Moreover, the various applications of drug delivery techniques such as drug absorption, controlled release and drug targeting based CD/PEO supramolecular complexes, are also discussed.
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Affiliation(s)
- Yue Zheng
- Department of internal medicine, The First Hospital in Qinhuangdao Affiliated to Hebei Medical University, Qinhuangdao 066004, China.
| | - Ian W Wyman
- Department of Chemistry, Queen's University, Kingston, ON K7L 3N6, Canada.
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Fu Q, Ren JM, Tan S, Xu J, Qiao GG. Synthesis of Novel Core Cross-Linked Star-Based Polyrotaxane End-Capped via “CuAAC” Click Chemistry. Macromol Rapid Commun 2012; 33:2109-14. [DOI: 10.1002/marc.201200489] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2012] [Revised: 08/20/2012] [Indexed: 11/09/2022]
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Alexander S, Cosgrove T, Castle TC, Grillo I, Prescott SW. Effect of Temperature, Cosolvent, and Added Drug on Pluronic–Flurbiprofen Micellization. J Phys Chem B 2012; 116:11545-51. [DOI: 10.1021/jp303185m] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Shirin Alexander
- School of Chemistry, University of Bristol, Bristol, BS8 1TS, U.K
| | - Terence Cosgrove
- School of Chemistry, University of Bristol, Bristol, BS8 1TS, U.K
| | - Thomas C. Castle
- Revolymer Ltd, 1 New Tech Square,
Zone 2, Deeside Industrial Park, Deeside, Flintshire, CH5 2NT, U.K
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Fu Q, Ren JM, Qiao GG. Synthesis of novel cylindrical bottlebrush polypseudorotaxane via inclusion complexation of high density poly(ε-caprolactone) bottlebrush polymer and α-cyclodextrins. Polym Chem 2012. [DOI: 10.1039/c1py00362c] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Yang C, Castelvetro V, Scalarone D, Bianchi S, Zhang Y. Three different β-cyclodextrins direct the emulsion copolymerization of a highly fluorinated methacrylate toward distinctive nanostructured particle morphologies. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/pola.24921] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Afifi H, Karlsson G, Heenan RK, Dreiss CA. Solubilization of oils or addition of monoglycerides drives the formation of wormlike micelles with an elliptical cross-section in cholesterol-based surfactants: a study by rheology, SANS, and cryo-TEM. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:7480-7492. [PMID: 21591650 DOI: 10.1021/la201026s] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We report the formation of wormlike micelles (WLM) in poly(oxyethylene) cholesteryl ether (ChEO(10)) aqueous solutions by the addition of lipophilic monoglycerides at room temperature (monolaurin (ML), monocaprin (MC), and monocaprylin (MCL)) bearing 12-, 10-, and 8-carbon alkyl chains, respectively. A combination of rheology, small-angle neutron scattering (SANS), and cryo-TEM was used to study their viscoelastic properties and structure. With the successive addition of cosurfactant, a significant increase in viscosity and a clear solidlike behavior is obtained, suggesting the formation of a viscoelastic network of wormlike micelles. Only for MCL is typical Maxwellian behavior obtained. The onset of micellar growth, as detected by the occurrence of solidlike behavior and a significant increase in viscosity, is obtained for 0.30 (1 wt%), 0.34 (1 wt%), and 0.60 (1.5 wt%) cosurfactant/ChEO(10) molar ratios with ML, MC, and MCL, respectively. With ML and MC, extremely long relaxation times (exceeding 20 s) compared to those of MCL are obtained, and zero-shear viscosity values are more than 1 order of magnitude higher than with MCL. These results show that cosurfactants with longer alkyl chain lengths (ML and MC) induce the formation of longer wormlike micelles and do so at lower concentrations. SANS measurements on dilute solutions confirm that the viscoelastic behavior correlates with an increase in contour length and reveals an elliptical cross-section with an axial ratio of around 2. Cryo-TEM images provide visual evidence of the wormlike micelles and confirm the elliptical shape of the cross-section. The addition of small amounts of aliphatic oils (ethyl butyrate, EB, and ethyl caprylate, EC) and cyclic oils (peppermint, PP, and tea tree, TT, oils) to ChEO(10) solutions induces wormlike micelle formation at a lower cosurfactant concentration or even in its absence (for PP, TT, and EC) because of their probable localization in the palisade layer. The viscosity peak and height of the plateau modulus occur at increasing monoglyceride concentration following the order PP ≈ TT > EC > EB > no oil.
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Affiliation(s)
- Hala Afifi
- King's College London, Institute of Pharmaceutical Science, 150 Stamford Street, SE1 9NH, UK
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Valero M, Dreiss CA. Growth, shrinking, and breaking of pluronic micelles in the presence of drugs and/or beta-cyclodextrin, a study by small-angle neutron scattering and fluorescence spectroscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:10561-10571. [PMID: 20465298 DOI: 10.1021/la100596q] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The associative structures between F127 Pluronic micelles and four drugs, namely, lidocaine (LD), pentobarbital sodium salt (PB), sodium naproxen (NP), and sodium salicylate (SAL), were studied by small-angle neutron scattering (SANS). Different outcomes for the micellar aggregates are observed, which are dependent on the chemical nature of the drug and the presence of charge or otherwise: the micelles grow with LD, are hardly modified with PB, and decrease in size with both NP and SAL. The partition coefficient, determined by fluorescence spectroscopy, is directly correlated to the amount of charge, following NP approximately SAL < PB < LD. All drugs are found to lie at the interfacial layer, with a slightly deeper localization of LD and more superficial for PB. All drugs can form inclusion complexes with heptakis(2,6-di-O-methyl) beta-cyclodextrin (hep2,6 beta-CD). Hep2,6 beta-CD, as shown in previous studies (Joseph, J.; Dreiss, C. A.; Cosgrove, T. Langmuir, 2008, 24, 10005-10010; Dreiss, C. A.; Nwabunwanne, E.; Liu, R.; Brooks, N. J. Soft Matter, 2009, 5, 1888-1896), is also able to form a complex with F127, resulting in micellar breakup. In the ternary mixtures, a fine balance of forces is involved, which results in drastic micellar changes, as observed from the SANS patterns. Depending on the ratio of drug, polymer, and hep2,6 beta-CD and the nature of the interactions (which is directly linked to the drug chemical structure), the presence of drug either hinders micellar breakup by beta-CD (at high enough concentration of LD or PB) or leads to micellar growth (NP). These effects are mainly attributed to a preferential drug/beta-CD interaction (except for PB), which, at least in the conditions studied here, explains the higher beta-CD concentration needed for micellar breakup to occur.
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Affiliation(s)
- Margarita Valero
- Dpto. Química Física, Facultad de Farmacia, Universidad de Salamanca, Campus Miguel de Unamuno, s/n, 37007 Salamanca, Spain
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Kaya E, Mathias LJ. Synthesis and characterization of physical crosslinking systems based on cyclodextrin inclusion/host-guest complexation. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/pola.23771] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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