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Li SF, Hu TG, Jin YB, Wu H. Fabrication and characterization of shellac nanofibers with colon-targeted delivery of quercetin and its anticancer activity. Int J Biol Macromol 2024; 265:130789. [PMID: 38479668 DOI: 10.1016/j.ijbiomac.2024.130789] [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: 01/02/2024] [Revised: 02/06/2024] [Accepted: 03/09/2024] [Indexed: 03/23/2024]
Abstract
In this study, the feasibility of shellac nanofibers as carrier system for colonic delivery of quercetin was evaluated. Firstly, the nanofibers without and with different amounts (2.5 %, 5.0 %, and 7.5 %) of quercetin were fabricated using pure shellac as a carrier by electrospinning. The morphology of nanofibers was bead-shape confirmed by SEM. FTIR, XRD, and DSC analysis showed that quercetin was encapsulated into shellac nanofibers, forming an amorphous complex. The molecular docking simulation indicated quercetin bound well to shellac through hydrogen bonding and van der Waals forces. These nanofibers had higher thermal stability than pure quercetin, and their surface wettability exhibited a pH-responsive behavior. The loading capacity of quercetin varied from 2.25 % to 6.84 % with the increased amount of quercetin, and it affected the stability of nanofibers in food simulants by measuring the release profiles of quercetin. The shellac nanofibers had high gastrointestinal stability, with a minimum quercetin release of 16.87 % in simulated digestive fluids, while the remaining quercetin was delivered to the colon and was released gradually. Moreover, the nanofibers exerted enhanced anticancer activity against HCT-116 cells by arresting cell cycle in G0/G1 phase and inducing cell apoptosis. Overall, shellac nanofibers are promising materials for colon-targeted delivery of active compounds.
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Affiliation(s)
- Shu-Fang Li
- School of Food Science and Engineering, South China University of Technology, Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, Guangzhou 510641, China
| | - Teng-Gen Hu
- Sericultural & Agri-Food Research Institute, Guangdong Academy of Agricultural Sciences, Key Laboratory of Functional Foods, Ministry of Agriculture, Guangdong Key Laboratory of Agricultural Products Processing, Guangzhou 510640, China
| | - Yuan-Bao Jin
- Ji'an College, Modern Agriculture and Forestry Engineering College, Jian 343000, China.
| | - Hong Wu
- School of Food Science and Engineering, South China University of Technology, Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, Guangzhou 510641, China.
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Liang D, Su W, Zhao X, Li J, Hua Z, Miao S, Tan M. Microfluidic Fabrication of pH-Responsive Nanoparticles for Encapsulation and Colon-Target Release of Fucoxanthin. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:124-135. [PMID: 34963047 DOI: 10.1021/acs.jafc.1c05580] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Improving the stability of fucoxanthin in the gastrointestinal tract is an important approach to enhance its oral bioavailability. The study proposed a new microfluidic device allowing for the synthesis of a structurally well-defined nanoscale delivery system with a uniform size for encapsulation and colon-target release of fucoxanthin. The rapid mixing in the microfluidic channel ensured that the mixing time was shorter than the aggregation time, thus realizing the controllable control of the coprecipitation of fucoxanthin and shellac polymer. In vitro digestion tests showed that a pH stimulus-responsive release of fucoxanthin from FX/SH NPs was observed under alkaline pH conditions. The fluorescence colocalization imaging indicated that FX/SH NPs did not affect the intestine function and had a protective effect on Caco-2 cells damaged by H2O2 by enhancing their antioxidant capacity. Overall, this work illustrated the promise of using a microfluidic approach to fabricate the biomimetic nanodelivery system for better biocompatibility and targeting efficacy.
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Affiliation(s)
- Duo Liang
- Academy of Food Interdisciplinary Science, School of Food Science and Technology, Dalian Polytechnic University, Qinggongyuan1, Ganjingzi District, Dalian 116034, Liaoning, China
- National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian 116034, Liaoning, China
- Collaborative Innovation Center of Seafood Deep Processing, Dalian Polytechnic University, Dalian 116034, Liaoning, China
| | - Wentao Su
- Academy of Food Interdisciplinary Science, School of Food Science and Technology, Dalian Polytechnic University, Qinggongyuan1, Ganjingzi District, Dalian 116034, Liaoning, China
- National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian 116034, Liaoning, China
- Collaborative Innovation Center of Seafood Deep Processing, Dalian Polytechnic University, Dalian 116034, Liaoning, China
| | - Xue Zhao
- Academy of Food Interdisciplinary Science, School of Food Science and Technology, Dalian Polytechnic University, Qinggongyuan1, Ganjingzi District, Dalian 116034, Liaoning, China
- National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian 116034, Liaoning, China
- Collaborative Innovation Center of Seafood Deep Processing, Dalian Polytechnic University, Dalian 116034, Liaoning, China
| | - Jiaxuan Li
- Academy of Food Interdisciplinary Science, School of Food Science and Technology, Dalian Polytechnic University, Qinggongyuan1, Ganjingzi District, Dalian 116034, Liaoning, China
- National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian 116034, Liaoning, China
- Collaborative Innovation Center of Seafood Deep Processing, Dalian Polytechnic University, Dalian 116034, Liaoning, China
| | - Zheng Hua
- Academy of Food Interdisciplinary Science, School of Food Science and Technology, Dalian Polytechnic University, Qinggongyuan1, Ganjingzi District, Dalian 116034, Liaoning, China
- National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian 116034, Liaoning, China
- Collaborative Innovation Center of Seafood Deep Processing, Dalian Polytechnic University, Dalian 116034, Liaoning, China
| | - Song Miao
- Teagasc Food Research Centre Moorepark, Fermoy, Co. Cork P61C996, Ireland
| | - Mingqian Tan
- Academy of Food Interdisciplinary Science, School of Food Science and Technology, Dalian Polytechnic University, Qinggongyuan1, Ganjingzi District, Dalian 116034, Liaoning, China
- National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian 116034, Liaoning, China
- Collaborative Innovation Center of Seafood Deep Processing, Dalian Polytechnic University, Dalian 116034, Liaoning, China
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Sandilya A, Natarajan U, Priya MH. Molecular View into the Cyclodextrin Cavity: Structure and Hydration. ACS OMEGA 2020; 5:25655-25667. [PMID: 33073091 PMCID: PMC7557249 DOI: 10.1021/acsomega.0c02760] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Accepted: 08/14/2020] [Indexed: 05/21/2023]
Abstract
We find, through atomistic molecular dynamics simulation of native cyclodextrins (CDs) in water, that although the outer surface of a CD appears like a truncated cone, the inner cavity resembles a conical hourglass because of the inward protrusion of the glycosidic oxygens. Furthermore, the conformations of the constituent α-glucose molecules are found to differ significantly from a free monomeric α-glucose molecule. This is the first computational study that maps the conformational change to the preferential hydrogen bond donating capacity of one of the secondary hydroxyl groups of CD, in consensus with an NMR experiment. We have developed a simple and novel geometry-based technique to identify water molecules occupying the nonspherical CD cavity, and the computed water occupancies are in close agreement with the experimental and density functional theory studies. Our analysis reveals that a water molecule in CD cavity loses out about two hydrogen bonds and remains energetically frustrated but possesses higher orientational degree of freedom compared to bulk water. In the context of CD-drug complexation, these imply a nonclassical, that is, enthalpically driven hydrophobic association of a drug in CD cavity.
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Affiliation(s)
- Avilasha
A. Sandilya
- Department
of Biotechnology, Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras, Chennai 600036, India
| | - Upendra Natarajan
- Department
of Chemical Engineering, Indian Institute
of Technology Madras, Chennai 600036, India
| | - M. Hamsa Priya
- Department
of Biotechnology, Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras, Chennai 600036, India
- . Phone: +91-44-22574132
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5
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Mohanta D, Jana M. Can 2,2,2-trifluoroethanol be an efficient protein denaturant than methanol and ethanol under thermal stress? Phys Chem Chem Phys 2018; 20:9886-9896. [DOI: 10.1039/c8cp01222a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report the heterogeneous unfolding phenomenon of a small protein Chymotrypsin Inhibitor 2 in various concentrations of methanol, ethanol and TFE solutions by performing atomistic molecular dynamics simulation studies. Our study reveals that the unfolding phenomenon of CI2 under thermal stress majorly depends on the concentration and the nature of the alcohol.
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Affiliation(s)
- Dayanidhi Mohanta
- Molecular Simulation Laboratory
- Department of Chemistry
- National Institute of Technology
- Rourkela – 769008
- India
| | - Madhurima Jana
- Molecular Simulation Laboratory
- Department of Chemistry
- National Institute of Technology
- Rourkela – 769008
- India
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Venuti V, Rossi B, Crupi V, D'Amico F, Gessini A, Majolino D, Masciovecchio C, Stancanelli R, Ventura CA. Solute-Solvent Interactions in Aqueous Solutions of Sulfobutyl Ether-β-cyclodextrin As Probed by UV-Raman and FTIR-ATR Analysis. J Phys Chem B 2016; 120:3746-53. [PMID: 27043008 DOI: 10.1021/acs.jpcb.6b02261] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
A vibrational study by means of UV-Raman and FTIR-ATR measurements has been performed on sulfobutyl ether β-cyclodextrin (SBE-β-CD)-water solutions, as a function of concentration and temperature, with the aim to provide a molecular-scale explanation of the enhanced performances as carrier agent exhibited by this modified macrocycle with respect to natural cyclodextrin. The attention has been mainly paid to the modifications induced on the vibrational band assigned to the O-H stretching intramolecular mode, in turn related to the dynamical rearrangement occurring in the hydrogen bonding (HB) network of water molecules. The results of our measurements clearly showed a characteristic "structure-breaker" effect on the tetrahedral HB arrangements induced on water molecules by increasing of both temperature and solute concentration, allowing us to also extract thermodynamic parameters. These results could be a key step for a clearer understanding of the connection between the dynamical properties of hydration water and the complexing ability of this cyclodextrin derivative.
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Affiliation(s)
- Valentina Venuti
- Dipartimento di Scienze Matematiche e Informatiche, Scienze Fisiche e Scienze della Terra, Università degli Studi di Messina , viale Ferdinando Stagno D'Alcontres 31, 98166 Messina, Italy
| | - Barbara Rossi
- Elettra - Sincrotrone Trieste , Strada Statale 14 km 163.5, Area Science Park, I-34149 Trieste, Italy.,Dipartimento di Fisica, Università degli Studi di Trento , via Sommarive 14, I-38123 Povo, Trento, Italy
| | - Vincenza Crupi
- Dipartimento di Scienze Matematiche e Informatiche, Scienze Fisiche e Scienze della Terra, Università degli Studi di Messina , viale Ferdinando Stagno D'Alcontres 31, 98166 Messina, Italy
| | - Francesco D'Amico
- Elettra - Sincrotrone Trieste , Strada Statale 14 km 163.5, Area Science Park, I-34149 Trieste, Italy
| | - Alessandro Gessini
- Elettra - Sincrotrone Trieste , Strada Statale 14 km 163.5, Area Science Park, I-34149 Trieste, Italy
| | - Domenico Majolino
- Dipartimento di Scienze Matematiche e Informatiche, Scienze Fisiche e Scienze della Terra, Università degli Studi di Messina , viale Ferdinando Stagno D'Alcontres 31, 98166 Messina, Italy
| | - Claudio Masciovecchio
- Dipartimento di Fisica, Università degli Studi di Trento , via Sommarive 14, I-38123 Povo, Trento, Italy
| | - Rosanna Stancanelli
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche e Ambientali, Università degli Studi di Messina , viale Ferdinando Stagno D'Alcontres 31, 98166 Messina, Italy
| | - Cinzia Anna Ventura
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche e Ambientali, Università degli Studi di Messina , viale Ferdinando Stagno D'Alcontres 31, 98166 Messina, Italy
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Schönbeck C, Westh P, Holm R. Complexation Thermodynamics of Modified Cyclodextrins: Extended Cavities and Distorted Structures. J Phys Chem B 2014; 118:10120-9. [DOI: 10.1021/jp506001j] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Christian Schönbeck
- NSM,
Research Unit for Functional Biomaterials, Roskilde University, Universitetsvej 1, DK-4000 Roskilde, Denmark
- Biologics
and Pharmaceutical Science, H. Lundbeck A/S, Ottiliavej 9, DK-2500 Valby, Denmark
- Department
of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen, Denmark
- Sino-Danish Center for Education and Research (SDC), Niels Jensens Vej 2, DK-8000 Aarhus C, Denmark
| | - Peter Westh
- NSM,
Research Unit for Functional Biomaterials, Roskilde University, Universitetsvej 1, DK-4000 Roskilde, Denmark
| | - René Holm
- Biologics
and Pharmaceutical Science, H. Lundbeck A/S, Ottiliavej 9, DK-2500 Valby, Denmark
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8
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Singh PK, Mora AK, Murudkar S, Nath S. Dynamics under confinement: torsional dynamics of Auramine O in a nanocavity. RSC Adv 2014. [DOI: 10.1039/c4ra03324h] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Confinement inside the novel anionic sulphobutylether β-cyclodextrin nanocavity significantly slows down the torsional relaxation in Auramine O as compared to native β-CD.
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Affiliation(s)
- Prabhat K. Singh
- Radiation & Photochemistry Division
- Bhabha Atomic Research Centre
- Mumbai 400 085, India
| | - Aruna K. Mora
- Radiation & Photochemistry Division
- Bhabha Atomic Research Centre
- Mumbai 400 085, India
| | - Sushant Murudkar
- Radiation & Photochemistry Division
- Bhabha Atomic Research Centre
- Mumbai 400 085, India
| | - Sukhendu Nath
- Radiation & Photochemistry Division
- Bhabha Atomic Research Centre
- Mumbai 400 085, India
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9
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Jana M, Bandyopadhyay S. Molecular Dynamics Study of β-Cyclodextrin–Phenylalanine (1:1) Inclusion Complex in Aqueous Medium. J Phys Chem B 2013; 117:9280-7. [DOI: 10.1021/jp404348u] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Madhurima Jana
- Molecular Simulation Laboratory,
Department of Chemistry, National Institute of Technology, Rourkela-769008, India
| | - Sanjoy Bandyopadhyay
- Molecular Modeling Laboratory,
Department of Chemistry, Indian Institute of Technology, Kharagpur-721302, India
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Kaminski K, Adrjanowicz K, Kaminska E, Grzybowska K, Hawelek L, Paluch M, Tarnacka M, Gruszka I, Kasprzycka A. Impact of water on molecular dynamics of amorphous α-, β-, and γ-cyclodextrins studied by dielectric spectroscopy. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2012; 86:031506. [PMID: 23030922 DOI: 10.1103/physreve.86.031506] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2012] [Indexed: 06/01/2023]
Abstract
Dielectric, calorimetric, and x-ray diffraction measurements were carried out on α-, β-, and γ-cyclodextrins, which are cyclic saccharides built by, respectively, six, seven, and eight glucose units connected via glycosidic linkage. Differential scanning calorimetry measurements indicated that each carbohydrate has a melting temperature located much above the temperature at which thermal decomposition begins. Moreover, calorimetric data revealed that it is possible to completely dehydrate each cyclodextrin by annealing them above 413 K. Unfortunately, it is impossible to obtain amorphous forms of cyclodextrin by simple cooling of the melt. Thus, a solid state amorphization method has been applied. X-ray diffraction studies demonstrated that by ball milling at room temperature we are able to obtain completely amorphous cyclodextrins. Finally, dielectric measurements were carried out to probe molecular dynamics in the amorphous state of cyclodextrins. It was found that there is only one relaxation process in amorphous hydrated cyclodextrins, while in dried samples two secondary relaxations are present. Moreover, we have shown that water has an enormous effect on the dynamics of both relaxation modes, i.e., with increasing content of water, the activation energy of the slow mode decreases, while that evaluated for the fast mode increases. We were not able to follow the dynamics of the structural relaxation process, because glass transition temperatures of amorphous cyclodextrins were found to lie above thermal degradation points.
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Affiliation(s)
- K Kaminski
- Institute of Physics, Silesian University, ul. Uniwersytecka 4, 40-007 Katowice, Poland
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11
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Zhang H, Ge C, van der Spoel D, Feng W, Tan T. Insight into the Structural Deformations of Beta-Cyclodextrin Caused by Alcohol Cosolvents and Guest Molecules. J Phys Chem B 2012; 116:3880-9. [DOI: 10.1021/jp300674d] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Haiyang Zhang
- Beijing Key
Lab of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Box 53,
100029 Beijing, China
- Department of Cell
and Molecular Biology, Uppsala University, Husargatan 3, Box 596, SE-751 24 Uppsala, Sweden
| | - Chunling Ge
- Beijing Key
Lab of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Box 53,
100029 Beijing, China
| | - David van der Spoel
- Department of Cell
and Molecular Biology, Uppsala University, Husargatan 3, Box 596, SE-751 24 Uppsala, Sweden
| | - Wei Feng
- Beijing Key
Lab of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Box 53,
100029 Beijing, China
| | - Tianwei Tan
- Beijing Key
Lab of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Box 53,
100029 Beijing, China
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12
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Sinha SK, Bandyopadhyay S. Local heterogeneous dynamics of water around lysozyme: a computer simulation study. Phys Chem Chem Phys 2012; 14:899-913. [DOI: 10.1039/c1cp22575h] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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13
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Bauer M, Fajolles C, Charitat T, Wacklin H, Daillant J. Amphiphilic Behavior of New Cholesteryl Cyclodextrins: A Molecular Study. J Phys Chem B 2011; 115:15263-70. [DOI: 10.1021/jp205917q] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Martin Bauer
- CEA, IRAMIS, SIS2M, LIONS, UMR 3299 CEA/CNRS, CEA-Saclay bât. 125, F-91191 Gif-sur-Yvette Cedex, France
| | - Christophe Fajolles
- CEA, IRAMIS, SIS2M, LIONS, UMR 3299 CEA/CNRS, CEA-Saclay bât. 125, F-91191 Gif-sur-Yvette Cedex, France
| | - Thierry Charitat
- Université de Strasbourg, Institut Charles Sadron, CNRS, 23 Rue du Loess, BP 84047, 67034 Strasbourg Cedex 2, France
| | - Hanna Wacklin
- Institut Laue-Langevin, 6 rue Jules Horowitz, BP 156, 38042 Grenoble Cedex, France
| | - Jean Daillant
- CEA, IRAMIS, SIS2M, LIONS, UMR 3299 CEA/CNRS, CEA-Saclay bât. 125, F-91191 Gif-sur-Yvette Cedex, France
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Terekhova I, Koźbiał M, Kumeev R, Gierycz P. Complex formation of native and hydroxypropylated cyclodextrins with benzoic acid in aqueous solution: Volumetric and 1H NMR study. Chem Phys Lett 2011. [DOI: 10.1016/j.cplett.2011.08.074] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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15
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Jana M, Bandyopadhyay S. Vibrational spectrum of water confined in and around cyclodextrins. Chem Phys Lett 2011. [DOI: 10.1016/j.cplett.2011.04.103] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Jana M, Bandyopadhyay S. Hydration properties of α-, β-, and γ-cyclodextrins from molecular dynamics simulations. J Phys Chem B 2011; 115:6347-57. [PMID: 21510684 DOI: 10.1021/jp2013946] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Atomistic molecular dynamics (MD) simulations of α-, β-, and γ-cyclodextrins (ACD, BCD, and GCD) in aqueous solutions have been performed. Detailed analyses were carried out to compare the microscopic properties of water confined within the cavities of these macromolecules and in the hydration layers around them. It is noticed that reduced tetrahedral ordering of water in and around the CD molecules are associated with their restricted motions. Interestingly, unlike the translational motions, the rotational motions of cavity water molecules are found to be highly dependent on cavity dimensions. Additionally, it is found that severely hindered rotational motion of cavity water molecules is the origin of drastically restricted structural relaxation of hydrogen bonds involving those water molecules. It is demonstrated that the geometrical constraints within the cavities of the CD molecules enhance the rate of reformation of broken hydrogen bonds, thereby resulting in rapid establishment of the breaking and reformation equilibria for hydrogen bonds involving cavity water molecules.
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Affiliation(s)
- Madhurima Jana
- Molecular Modeling Laboratory, Department of Chemistry, Indian Institute of Technology, Kharagpur - 721302, India
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17
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Jana M, Bandyopadhyay S. Kinetics of hydrogen bonds in aqueous solutions of cyclodextrin and its methyl-substituted forms. J Chem Phys 2011; 134:025103. [PMID: 21241151 DOI: 10.1063/1.3530781] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Molecular dynamics simulations of β-cyclodextrin (BCD) and its two methyl-substituted derivatives, namely, heptakis(2,6-di-O-methyl)-β-cyclodextrin (DIMEB) and heptakis(2,3,6-tri-O-methyl)-β-cyclodextrin (TRIMEB) have been performed in aqueous solutions. Detailed analyses were carried out to investigate the effects of substitution on the kinetics of cyclodextrin-water and water-water hydrogen bonds formed by water present in the hydration layers around these macromolecules as well as those formed by water inside their cavities. It is observed that increased geometrical constraints due to substitution of the OH groups of the glucose rings of the BCD molecule result in rapid establishment of hydrogen bond breaking and reformation equilibria for DIMEB and TRIMEB. This has been found to be the microscopic origin of highly rigid arrangement of water around TRIMEB and inside its cavity, as against water in and around BCD and DIMEB.
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Affiliation(s)
- Madhurima Jana
- Molecular Modeling Laboratory, Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, India
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18
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Messner M, Kurkov SV, Brewster ME, Jansook P, Loftsson T. Self-assembly of cyclodextrin complexes: Aggregation of hydrocortisone/cyclodextrin complexes. Int J Pharm 2011; 407:174-83. [DOI: 10.1016/j.ijpharm.2011.01.011] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2010] [Accepted: 01/10/2011] [Indexed: 10/18/2022]
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Vibrational Properties of Cyclodextrin–Water Solutions Investigated by Low-Frequency Raman Scattering: Temperature and Concentration Effects. FOOD BIOPHYS 2010. [DOI: 10.1007/s11483-010-9196-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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20
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Jana M, Bandyopadhyay S. Low-frequency vibrational spectrum of water around cyclodextrin and its methyl-substituted derivatives. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:14097-14102. [PMID: 20704347 DOI: 10.1021/la101927g] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Atomistic molecular dynamics (MD) simulations have been carried out to study the low-frequency intermolecular vibrational spectrum of water present in the surrounding hydration layers and inside the cavities of beta-cyclodextrin (BCD) and its di- and trimethyl substituted derivatives, namely, heptakis(2,6-di-O-methyl)-beta-cyclodextrin (DIMEB) and heptakis(2,3,6-tri-O-methyl)-beta-cyclodextrin (TRIMEB) in aqueous solutions. Attempts have been made to explore the effects of confinement in and around these cyclic macromolecules and the formation of hydrogen bonds between water and the glucopyranose rings on the distribution of the intermolecular vibrational density of states of water. The calculations revealed that compared to bulk water these bands are blue-shifted for water in proximity to these molecules, the extents of the shifts being more pronounced for the cavity water molecules. It is further noticed that the relatively more restricted local motions of water bound to the cyclodextrins by hydrogen bonds result in larger blue shifts of these bands. These results can be verified by suitable experiments.
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Affiliation(s)
- Madhurima Jana
- Molecular Modeling Laboratory, Department of Chemistry, Indian Institute of Technology, Kharagpur-721302, India
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