51
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Roy MN, Saha S, Barman S, Ekka D. Host–guest inclusion complexes of RNA nucleosides inside aqueous cyclodextrins explored by physicochemical and spectroscopic methods. RSC Adv 2016. [DOI: 10.1039/c5ra24102b] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Spectroscopic and physicochemical studies reveal formation of host–guest inclusion complexes of RNA nucleosides inside hydrophobic cavity of α and β-cyclodextrins.
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Affiliation(s)
- Mahendra Nath Roy
- Department of Chemistry
- University of North Bengal
- Darjeeling-734013
- India
| | - Subhadeep Saha
- Department of Chemistry
- University of North Bengal
- Darjeeling-734013
- India
| | - Siti Barman
- Department of Chemistry
- University of North Bengal
- Darjeeling-734013
- India
| | - Deepak Ekka
- Department of Chemistry
- University of North Bengal
- Darjeeling-734013
- India
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52
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Saha S, Ray T, Basak S, Roy MN. NMR, surface tension and conductivity studies to determine the inclusion mechanism: thermodynamics of host–guest inclusion complexes of natural amino acids in aqueous cyclodextrins. NEW J CHEM 2016. [DOI: 10.1039/c5nj02179k] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The novel study explains the formation of 1 : 1 host–guest inclusion complexes based upon hydrophobic effects, H-bonds, electrostatic forces and structural effects.
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Affiliation(s)
- Subhadeep Saha
- Department of Chemistry
- University of North Bengal
- Darjeeling-734013
- India
| | - Tanusree Ray
- Department of Chemistry
- University of North Bengal
- Darjeeling-734013
- India
| | - Saptarshi Basak
- Department of Chemistry
- University of North Bengal
- Darjeeling-734013
- India
| | - Mahendra Nath Roy
- Department of Chemistry
- University of North Bengal
- Darjeeling-734013
- India
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53
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Vanbésien T, Sayede A, Monflier E, Hapiot F. A self-emulsifying catalytic system for the aqueous biphasic hydroformylation of triglycerides. Catal Sci Technol 2016. [DOI: 10.1039/c5cy01758k] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The Rh-catalyzed hydroformylation of the CC double bonds of triglycerides (T) was performed in aqueous medium through the formation of supramolecular complexes resulting from the inclusion of the alkenyl chains of T into the cavity of modified cyclodextrins (CDs).
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Affiliation(s)
- T. Vanbésien
- Univ. Artois
- UMR 8181, Unité de Catalyse et de Chimie du Solide (UCCS)
- F-62300 Lens
- France
- CNRS
| | - A. Sayede
- Univ. Artois
- UMR 8181, Unité de Catalyse et de Chimie du Solide (UCCS)
- F-62300 Lens
- France
- CNRS
| | - E. Monflier
- Univ. Artois
- UMR 8181, Unité de Catalyse et de Chimie du Solide (UCCS)
- F-62300 Lens
- France
- CNRS
| | - F. Hapiot
- Univ. Artois
- UMR 8181, Unité de Catalyse et de Chimie du Solide (UCCS)
- F-62300 Lens
- France
- CNRS
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54
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Raffaini G, Mazzaglia A, Ganazzoli F. Aggregation behaviour of amphiphilic cyclodextrins: the nucleation stage by atomistic molecular dynamics simulations. Beilstein J Org Chem 2015; 11:2459-73. [PMID: 26734094 PMCID: PMC4685891 DOI: 10.3762/bjoc.11.267] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Accepted: 11/19/2015] [Indexed: 01/01/2023] Open
Abstract
Amphiphilically modified cyclodextrins may form various supramolecular aggregates. Here we report a theoretical study of the aggregation of a few amphiphilic cyclodextrins carrying hydrophobic thioalkyl groups and hydrophilic ethylene glycol moieties at opposite rims, focusing on the initial nucleation stage in an apolar solvent and in water. The study is based on atomistic molecular dynamics methods with a "bottom up" approach that can provide important information about the initial aggregates of few molecules. The focus is on the interaction pattern of amphiphilic cyclodextrin (aCD), which may interact by mutual inclusion of the substituent groups in the hydrophobic cavity of neighbouring molecules or by dispersion interactions at their lateral surface. We suggest that these aggregates can also form the nucleation stage of larger systems as well as the building blocks of micelles, vesicle, membranes, or generally nanoparticles thus opening new perspectives in the design of aggregates correlating their structures with the pharmaceutical properties.
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Affiliation(s)
- Giuseppina Raffaini
- Dipartimento di Chimica, Materiali e Ingegneria Chimica ‘G. Natta’, Politecnico di Milano, via L. Mancinelli 7, 20131 Milano, Italy
- Unità Politecnico, INSTM, piazza Leonardo da Vinci 32, 20133 Milano, Italy
| | - Antonino Mazzaglia
- CNR-ISMN Istituto per lo Studio dei Materiali Nanostrutturati, c/o Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali dell’Università di Messina, Via F. Stagno d'Alcontres 31, 98166 Messina, Italy
| | - Fabio Ganazzoli
- Dipartimento di Chimica, Materiali e Ingegneria Chimica ‘G. Natta’, Politecnico di Milano, via L. Mancinelli 7, 20131 Milano, Italy
- Unità Politecnico, INSTM, piazza Leonardo da Vinci 32, 20133 Milano, Italy
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55
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Feng T, Li M, Zhou J, Zhuang H, Chen F, Ye R, Campanella O, Fang Z. Application of molecular dynamics simulation in food carbohydrate research—a review. INNOV FOOD SCI EMERG 2015. [DOI: 10.1016/j.ifset.2015.06.015] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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56
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Gao K, Yin J, Henriksen NM, Fenley AT, Gilson MK. Binding enthalpy calculations for a neutral host-guest pair yield widely divergent salt effects across water models. J Chem Theory Comput 2015; 11:4555-64. [PMID: 26574247 DOI: 10.1021/acs.jctc.5b00676] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Dissolved salts are a part of the physiological milieu and can significantly influence the kinetics and thermodynamics of various biomolecular processes, such as binding and catalysis; thus, it is important for molecular simulations to reliably describe their effects. The present study uses a simple, nonionized host-guest model system to study the sensitivity of computed binding enthalpies to the choice of water and salt models. Molecular dynamics simulations of a cucurbit[7]uril host with a neutral guest molecule show striking differences in the salt dependency of the binding enthalpy across four water models, TIP3P, SPC/E, TIP4P-Ew, and OPC, with additional sensitivity to the choice of parameters for sodium and chloride. In particular, although all of the models predict that binding will be less exothermic with increasing NaCl concentration, the strength of this effect varies by 7 kcal/mol across models. The differences appear to result primarily from differences in the number of sodium ions displaced from the host upon binding the guest rather than from differences in the enthalpy associated with this displacement, and it is the electrostatic energy that contributes most to the changes in enthalpy with increasing salt concentration. That a high sensitivity of salt affecting the choice of water model, as observed for the present host-guest system despite it being nonionized, raises issues regarding the selection and adjustment of water models for use with biological macromolecules, especially as these typically possess multiple ionized groups that can interact relatively strongly with ions in solution.
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Affiliation(s)
- Kaifu Gao
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego , 9500 Gilman Drive, La Jolla, California 92093-0736, United States
| | - Jian Yin
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego , 9500 Gilman Drive, La Jolla, California 92093-0736, United States
| | - Niel M Henriksen
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego , 9500 Gilman Drive, La Jolla, California 92093-0736, United States
| | - Andrew T Fenley
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego , 9500 Gilman Drive, La Jolla, California 92093-0736, United States
| | - Michael K Gilson
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego , 9500 Gilman Drive, La Jolla, California 92093-0736, United States
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57
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Rather MY, Nordberg Karlsson E, Adlercreutz P. Complexation of alkyl glycosides with α-cyclodextrin can have drastically different effects on their conversion by glycoside hydrolases. J Biotechnol 2015; 200:52-8. [PMID: 25711178 DOI: 10.1016/j.jbiotec.2015.02.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Revised: 02/11/2015] [Accepted: 02/13/2015] [Indexed: 11/16/2022]
Abstract
Substrates present in aggregated forms, such as micelles, are often poorly converted by enzymes. Alkyl glycosides constitute typical examples and the critical micelle concentration (CMC) decreases with increasing length of the alkyl group. In this study, possibilities to hydrolyse alkyl glycosides by glycoside hydrolases were explored, and α-cyclodextrin was used as an agent to form inclusion complexes with the alkyl glycosides, thereby preventing micelle formation. The cyclodextrin complexes were accepted as substrates by the enzymes to variable extent. The β-glucosidases originating from Thermotoga neapolitana (Tn Bgl3B) and from almond were not at all able to hydrolyse alkyl β-glucosides in the presence of 100mM α-cyclodextrin. However, Aspergillus niger amyloglucosidase readily accepted the complexes as substrates. In reactions involving decyl and dodecyl maltosides, the presence of 100mM α-cyclodextrin caused an increase in reaction rate in most cases, especially at high substrate concentrations. Surprisingly, the amyloglucosidase-catalyzed hydrolysis of octyl-β-maltoside to glucose and β-octylglucoside was faster in the presence of α-cyclodextrin than without, even at substrate concentrations below CMC. A possible explanation of the observed rate enhancement is that binding sites on the carbohydrate binding domain of amyloglucosidase, known to bind cyclodextrins, help to guide the alkyl glycoside-cyclodextrin complex to the active site, and thereby promote its conversion.
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Affiliation(s)
- Mohd Younis Rather
- Department of Biotechnology, Lund University, P.O. Box 124, SE-22100 Lund, Sweden
| | | | - Patrick Adlercreutz
- Department of Biotechnology, Lund University, P.O. Box 124, SE-22100 Lund, Sweden.
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58
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Roy MN, Roy MC, Roy K. Investigation of an inclusion complex formed by ionic liquid and β-cyclodextrin through hydrophilic and hydrophobic interactions. RSC Adv 2015. [DOI: 10.1039/c5ra09823h] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An investigation of the inclusion behavior of a guest ionic liquid (IL) 1-methyl-3-octylimidazolium tetrafluoroborate into the host cavity of β-cyclodextrin in aqueous solution has been carried out towards modern research to gain a far reaching effect.
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Affiliation(s)
- Mahendra Nath Roy
- Department of Chemistry
- University of North Bengal
- Darjeeling-734013
- India
| | - Milan Chandra Roy
- Department of Chemistry
- University of North Bengal
- Darjeeling-734013
- India
| | - Kanak Roy
- Department of Chemistry
- University of North Bengal
- Darjeeling-734013
- India
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59
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Fernández-Rosas J, Pessêgo M, Cepeda-Plaza M, Basilio N, Parajó M, Rodríguez-Dafonte P, García-Río L. γ-Cyclodextrin modulates the chemical reactivity by multiple complexation. Org Biomol Chem 2015; 13:1213-24. [DOI: 10.1039/c4ob02113d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Multiple recognition by cooperative/competitive mechanisms to form a 1 : 1 : 1 inclusion complex plays a crucial role in determining the chemical reactivity in the γ-CD cavity.
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Affiliation(s)
- J. Fernández-Rosas
- Departamento de Química Física
- Centro de Investigación en Química Biológica y Materiales Moleculares (CIQUS)
- Universidad de Santiago
- 15782 Santiago
- Spain
| | - M. Pessêgo
- Departamento de Química Física
- Centro de Investigación en Química Biológica y Materiales Moleculares (CIQUS)
- Universidad de Santiago
- 15782 Santiago
- Spain
| | - M. Cepeda-Plaza
- Departamento de Química
- Universidad Andrés Bello
- Santiago
- Chile
| | - N. Basilio
- REQUIMTE
- Departamento de Química
- Faculdade de Ciências e Tecnologia
- Universidade Nova de Lisboa
- 2829-516 Caparica
| | - M. Parajó
- Departamento de Química Física
- Centro de Investigación en Química Biológica y Materiales Moleculares (CIQUS)
- Universidad de Santiago
- 15782 Santiago
- Spain
| | - P. Rodríguez-Dafonte
- Departamento de Química Física
- Centro de Investigación en Química Biológica y Materiales Moleculares (CIQUS)
- Universidad de Santiago
- 15782 Santiago
- Spain
| | - L. García-Río
- Departamento de Química Física
- Centro de Investigación en Química Biológica y Materiales Moleculares (CIQUS)
- Universidad de Santiago
- 15782 Santiago
- Spain
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60
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Effect of γ-cyclodextrin on solubilization and complexation of irbesartan: Influence of pH and excipients. Int J Pharm 2014; 474:80-90. [DOI: 10.1016/j.ijpharm.2014.08.013] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2014] [Revised: 08/07/2014] [Accepted: 08/09/2014] [Indexed: 11/19/2022]
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61
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Börner T, Roger K, Adlercreutz P. Hydrophobic Complexation Promotes Enzymatic Surfactant Synthesis from Alkyl Glucoside/Cyclodextrin Mixtures. ACS Catal 2014. [DOI: 10.1021/cs500192q] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | - Patrick Adlercreutz
- Department of Biotechnology, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden
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62
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Mixcoha E, Campos-Terán J, Piñeiro Á. Surface Adsorption and Bulk Aggregation of Cyclodextrins by Computational Molecular Dynamics Simulations as a Function of Temperature: α-CD vs β-CD. J Phys Chem B 2014; 118:6999-7011. [DOI: 10.1021/jp412533b] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Edgar Mixcoha
- Soft Matter & Molecular Biophysics Group, Department of Applied Physics, Universidade de Santiago de Compostela, Santiago de Compostela, 15782, Spain
| | - José Campos-Terán
- Departamento
de Procesos y Tecnología, Universidad Autónoma Metropolitana, Unidad Cuajimalpa, Av. Vasco de Quiroga 4871, Col.
Santa Fe, Delegación Cuajimalpa de Morelos, 05348, D.F., México
| | - Ángel Piñeiro
- Soft Matter & Molecular Biophysics Group, Department of Applied Physics, Universidade de Santiago de Compostela, Santiago de Compostela, 15782, Spain
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63
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Valente AJM, Söderman O. The formation of host-guest complexes between surfactants and cyclodextrins. Adv Colloid Interface Sci 2014; 205:156-76. [PMID: 24011696 DOI: 10.1016/j.cis.2013.08.001] [Citation(s) in RCA: 133] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2013] [Revised: 08/01/2013] [Accepted: 08/01/2013] [Indexed: 11/15/2022]
Abstract
Cyclodextrins are able to act as host molecules in supramolecular chemistry with applications ranging from pharmaceutics to detergency. Among guest molecules surfactants play an important role with both fundamental and practical applications. The formation of cyclodextrin/surfactant host-guest compounds leads to an increase in the critical micelle concentration and in the solubility of surfactants. The possibility of changing the balance between several intermolecular forces, and thus allowing the study of, e.g., dehydration and steric hindrance effects upon association, makes surfactants ideal guest molecules for fundamental studies. Therefore, these systems allow for obtaining a deep insight into the host-guest association mechanism. In this paper, we review the influence on the thermodynamic properties of CD-surfactant association by highlighting the effect of different surfactant architectures (single tail, double-tailed, gemini and bolaform), with special emphasis on cationic surfactants. This is complemented with an assessment of the most common analytical techniques used to follow the association process. The applied methods for computation of the association stoichiometry and stability constants are also reviewed and discussed; this is an important point since there are significant discrepancies and scattered data for similar systems in the literature. In general, the surfactant-cyclodextrin association is treated without reference to the kinetics of the process. However, there are several examples where the kinetics of the process can be investigated, in particular those where volumes of the CD cavity and surfactant (either the tail or in special cases the head group) are similar in magnitude. This will also be critically reviewed.
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Affiliation(s)
- Artur J M Valente
- Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal.
| | - Olle Söderman
- Division of Physical Chemistry, Center for Chemistry and Chemical Engineering, Lund University, Lund, Sweden
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64
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Roy MN, Ekka D, Saha S, Chandra Roy M. Host–guest inclusion complexes of α and β-cyclodextrins with α-amino acids. RSC Adv 2014. [DOI: 10.1039/c4ra07877b] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The innovative study reveals the formation of 1:1 hosts–guest inclusion complexes for all the titled α-amino acids in the hydrophobic cavity of both α and β-cyclodextrin. The thermodynamic parameters for inclusion were studied depending on size and state of the guest molecules to draw inferences about contributions to the overall binding.
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Affiliation(s)
- Mahendra Nath Roy
- Department of Chemistry
- University of North Bengal
- Darjeeling-734013, India
| | - Deepak Ekka
- Department of Chemistry
- University of North Bengal
- Darjeeling-734013, India
| | - Subhadeep Saha
- Department of Chemistry
- University of North Bengal
- Darjeeling-734013, India
| | - Milan Chandra Roy
- Department of Chemistry
- University of North Bengal
- Darjeeling-734013, India
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65
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Basílio N, Francisco V, García-Río L. Independent Pathway Formation of Guest–Host in Host Ternary Complexes Made of Ammonium Salt, Calixarene, and Cyclodextrin. J Org Chem 2012; 77:10764-72. [DOI: 10.1021/jo302074x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Nuno Basílio
- Departamento Quimica
Fisica, Centro Singular de Investigación
en Química Biológica y Materiales Moleculares (CIQUS), Universidad de Santiago, 15782 Santiago, Spain
| | - Vitor Francisco
- Departamento Quimica
Fisica, Centro Singular de Investigación
en Química Biológica y Materiales Moleculares (CIQUS), Universidad de Santiago, 15782 Santiago, Spain
| | - Luis García-Río
- Departamento Quimica
Fisica, Centro Singular de Investigación
en Química Biológica y Materiales Moleculares (CIQUS), Universidad de Santiago, 15782 Santiago, Spain
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66
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Chen LF, Shen Q, Shen JP, Shi DT, Chen T, Yu HR. Studies and comparison of the liquid adsorption and surface properties of α-, β- and γ-cyclodextrins by FTIR and capillary rise method. Colloids Surf A Physicochem Eng Asp 2012. [DOI: 10.1016/j.colsurfa.2012.07.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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67
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Brocos P, Banquy X, Díaz-Vergara N, Pérez-Casas S, Piñeiro Á, Costas M. A Critical Approach to the Thermodynamic Characterization of Inclusion Complexes: Multiple-Temperature Isothermal Titration Calorimetric Studies of Native Cyclodextrins with Sodium Dodecyl Sulfate. J Phys Chem B 2011; 115:14381-96. [DOI: 10.1021/jp208740b] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Pilar Brocos
- Departamento de Física Aplicada, Facultad de Física, Universidad de Santiago de Compostela, Campus Vida, E-15782 Santiago de Compostela, Spain
| | - Xavier Banquy
- Laboratorio de Biofisicoquímica, Departamento de Fisicoquímica, Facultad de Química, Universidad Nacional Autónoma de México, Cd. Universitaria, México D.F. 04510, Mexico
| | - Norma Díaz-Vergara
- Laboratorio de Biofisicoquímica, Departamento de Fisicoquímica, Facultad de Química, Universidad Nacional Autónoma de México, Cd. Universitaria, México D.F. 04510, Mexico
| | - Silvia Pérez-Casas
- Laboratorio de Biofisicoquímica, Departamento de Fisicoquímica, Facultad de Química, Universidad Nacional Autónoma de México, Cd. Universitaria, México D.F. 04510, Mexico
| | - Ángel Piñeiro
- Departamento de Física Aplicada, Facultad de Física, Universidad de Santiago de Compostela, Campus Vida, E-15782 Santiago de Compostela, Spain
- Laboratorio de Biofisicoquímica, Departamento de Fisicoquímica, Facultad de Química, Universidad Nacional Autónoma de México, Cd. Universitaria, México D.F. 04510, Mexico
| | - Miguel Costas
- Laboratorio de Biofisicoquímica, Departamento de Fisicoquímica, Facultad de Química, Universidad Nacional Autónoma de México, Cd. Universitaria, México D.F. 04510, Mexico
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68
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Jiang L, Yan Y, Huang J. Versatility of cyclodextrins in self-assembly systems of amphiphiles. Adv Colloid Interface Sci 2011; 169:13-25. [PMID: 21839422 DOI: 10.1016/j.cis.2011.07.002] [Citation(s) in RCA: 130] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2011] [Revised: 07/14/2011] [Accepted: 07/16/2011] [Indexed: 11/25/2022]
Abstract
Recently, cyclodextrins (CDs) were found to play important yet complicated (or even apparently opposite sometimes) roles in self-assembly systems of amphiphiles or surfactants. Herein, we try to review and clarify the versatility of CDs in surfactant assembly systems by 1) classifying the roles played by CDs into two groups (modulator and building unit) and four subgroups (destructive and constructive modulators, amphiphilic and unamphiphilic building units), 2) comparing these subgroups, and 3) analyzing mechanisms. As a modulator, although CDs by themselves do not participate into the final surfactant aggregates, they can greatly affect the aggregates in two ways. In most cases CDs will destroy the aggregates by depleting surfactant molecules from the aggregates (destructive), or in certain cases CDs can promote the aggregates to grow by selectively removing the less-aggregatable surfactant molecules from the aggregates (constructive). As an amphiphilic building unit, CDs can be chemically (by chemical bonds) or physically (by host-guest interaction) attached to a hydrophobic moiety, and the resultant compounds act as classic amphiphiles. As an unamphiphilic building unit, CD/surfactant complexes or even CDs on their own can assemble into aggregates in an unconventional, unamphiphilic manner driven by CD-CD H-bonds. Moreover, special emphasis is put on two recently appeared aspects: the constructive modulator and unamphiphilic building unit.
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69
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Dou Z, Xing H, Xiao J. Hydrogenated and Fluorinated Host–Guest Surfactants: Complexes of Cyclodextrins with Alkanes and Fluoroalkyl‐Grafted Alkanes. Chemistry 2011; 17:5373-80. [DOI: 10.1002/chem.201003443] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2010] [Indexed: 11/09/2022]
Affiliation(s)
- Zeng‐Pei Dou
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871 (P.R. China), Fax: (+86) 10‐62561871
| | - Hang Xing
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871 (P.R. China), Fax: (+86) 10‐62561871
- Beijing FLUOBON Surfactant Institute, Beijing 100080 (P.R. China)
| | - Jin‐Xin Xiao
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871 (P.R. China), Fax: (+86) 10‐62561871
- Beijing FLUOBON Surfactant Institute, Beijing 100080 (P.R. China)
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70
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López CA, de Vries AH, Marrink SJ. Molecular mechanism of cyclodextrin mediated cholesterol extraction. PLoS Comput Biol 2011; 7:e1002020. [PMID: 21455285 PMCID: PMC3063748 DOI: 10.1371/journal.pcbi.1002020] [Citation(s) in RCA: 146] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2010] [Accepted: 02/03/2011] [Indexed: 11/19/2022] Open
Abstract
The depletion of cholesterol from membranes, mediated by β-cyclodextrin (β-CD) is well known and documented, but the molecular details of this process are largely unknown. Using molecular dynamics simulations, we have been able to study the CD mediated extraction of cholesterol from model membranes, in particular from a pure cholesterol monolayer, at atomic resolution. Our results show that efficient cholesterol extraction depends on the structural distribution of the CDs on the surface of the monolayer. With a suitably oriented dimer, cholesterol is extracted spontaneously on a nanosecond time scale. Additional free energy calculations reveal that the CDs have a strong affinity to bind to the membrane surface, and, by doing so, destabilize the local packing of cholesterol molecules making their extraction favorable. Our results have implications for the interpretation of experimental measurements, and may help in the rational design of efficient CD based nano-carriers. The ability of certain molecules to capture other molecules forming so-called inclusion complexes has a range of potential important applications in e.g. drug delivery and chemical sensing. Here we study the complexation of cholesterol by small oligosaccharide rings named cyclodextrins (CDs). Cholesterol is an essential lipid in the plasma cell membrane, and the ability of CDs to extract cholesterol is widely used in the biomedical field to control the level of cholesterol in the membrane. The molecular mechanism of this process, however, is still not resolved. Using a detailed computational model of cholesterol and CD, we have succeeded to simulate this extraction process. We observe that the CDs are rapidly binding to the membrane surface in a dimeric form, and, provided that the CD dimers are in a suitable orientation, cholesterol molecules are being extracted spontaneously. The cholesterol/CD inclusion complex remains adsorbed on the surface; our simulations predict that the rate limiting step for the actual transport of cholesterol is the desorption of the complex from the membrane. With a clearer understanding of the basic molecular mechanism of the CD mediated process of cholesterol extraction, we can begin to rationalize the design of more efficient CDs in numerous applications.
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Affiliation(s)
- Cesar A. López
- Groningen Biomolecular Sciences and Biotechnology Institute & Zernike Institute for Advanced Materials, University of Groningen, Groningen, The Netherlands
| | - Alex H. de Vries
- Groningen Biomolecular Sciences and Biotechnology Institute & Zernike Institute for Advanced Materials, University of Groningen, Groningen, The Netherlands
| | - Siewert J. Marrink
- Groningen Biomolecular Sciences and Biotechnology Institute & Zernike Institute for Advanced Materials, University of Groningen, Groningen, The Netherlands
- * E-mail:
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71
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Brocos P, Díaz-Vergara N, Banquy X, Pérez-Casas S, Costas M, Piñeiro Á. Similarities and Differences Between Cyclodextrin−Sodium Dodecyl Sulfate Host−Guest Complexes of Different Stoichiometries: Molecular Dynamics Simulations at Several Temperatures. J Phys Chem B 2010; 114:12455-67. [DOI: 10.1021/jp103223u] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Pilar Brocos
- Departamento de Física Aplicada, Facultad de Física, Universidad de Santiago de Compostela, Campus Vida, E-15782 Santiago de Compostela, Spain, and Laboratorio de Biofisicoquímica, Departamento de Fisicoquímica, Facultad de Química, Universidad Nacional Autónoma de México, Cd. Universitaria, México D.F. 04510, Mexico
| | - Norma Díaz-Vergara
- Departamento de Física Aplicada, Facultad de Física, Universidad de Santiago de Compostela, Campus Vida, E-15782 Santiago de Compostela, Spain, and Laboratorio de Biofisicoquímica, Departamento de Fisicoquímica, Facultad de Química, Universidad Nacional Autónoma de México, Cd. Universitaria, México D.F. 04510, Mexico
| | - Xavier Banquy
- Departamento de Física Aplicada, Facultad de Física, Universidad de Santiago de Compostela, Campus Vida, E-15782 Santiago de Compostela, Spain, and Laboratorio de Biofisicoquímica, Departamento de Fisicoquímica, Facultad de Química, Universidad Nacional Autónoma de México, Cd. Universitaria, México D.F. 04510, Mexico
| | - Silvia Pérez-Casas
- Departamento de Física Aplicada, Facultad de Física, Universidad de Santiago de Compostela, Campus Vida, E-15782 Santiago de Compostela, Spain, and Laboratorio de Biofisicoquímica, Departamento de Fisicoquímica, Facultad de Química, Universidad Nacional Autónoma de México, Cd. Universitaria, México D.F. 04510, Mexico
| | - Miguel Costas
- Departamento de Física Aplicada, Facultad de Física, Universidad de Santiago de Compostela, Campus Vida, E-15782 Santiago de Compostela, Spain, and Laboratorio de Biofisicoquímica, Departamento de Fisicoquímica, Facultad de Química, Universidad Nacional Autónoma de México, Cd. Universitaria, México D.F. 04510, Mexico
| | - Ángel Piñeiro
- Departamento de Física Aplicada, Facultad de Física, Universidad de Santiago de Compostela, Campus Vida, E-15782 Santiago de Compostela, Spain, and Laboratorio de Biofisicoquímica, Departamento de Fisicoquímica, Facultad de Química, Universidad Nacional Autónoma de México, Cd. Universitaria, México D.F. 04510, Mexico
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72
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Ghosh BC, Deb N, Mukherjee AK. Determination of Individual Proton Affinities of Ofloxacin from its UV−Vis Absorption, Fluorescence and Charge-Transfer Spectra: Effect of Inclusion in β-Cyclodextrin on the Proton Affinities. J Phys Chem B 2010; 114:9862-71. [DOI: 10.1021/jp103014b] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
| | - Nipamanjari Deb
- Department of Chemistry, The University of Burdwan, Burdwan-713 104, India
| | - Asok K. Mukherjee
- Department of Chemistry, The University of Burdwan, Burdwan-713 104, India
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73
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Leclercq L, Nardello-Rataj V, Rauwel G, Aubry JM. Structure-activity relationship of cyclodextrin/biocidal double-tailed ammonium surfactant host-guest complexes: towards a delivery molecular mechanism? Eur J Pharm Sci 2010; 41:265-75. [PMID: 20615466 DOI: 10.1016/j.ejps.2010.06.017] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2010] [Revised: 05/14/2010] [Accepted: 06/23/2010] [Indexed: 10/19/2022]
Abstract
In aqueous solution, the biocidal double-tailed cationic surfactant, di-n-decyl-dimethyl-ammonium chloride can form inclusion complexes with various cyclodextrins (alpha-CD, beta-CD, gamma-CD, HP-alpha-CD, HP-beta-CD and CM-beta-CD). A physicochemical study has been performed to investigate the association parameters of these host-guest complexes by combining the use of ammonium and chloride selective electrodes, NMR spectroscopy and molecular modeling. stoichiometries, equilibrium constants and geometries were determined by resorting to a specific algorithm. The antimicrobial activity of the encapsulated ammonium surfactant was compared with that of the free ammonium showing three different behaviors depending on the cyclodextrin. The close relationship between the complex structure and the biocidal activity is used to propose a delivery molecular mechanism.
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Affiliation(s)
- Loïc Leclercq
- Université Lille 1, EA Chimie Moléculaire et Formulation, Equipe Oxydation et Physico-chimie de la Formulation, Bât. C6, Villeneuve d'Ascq Cedex, France
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74
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Mahata A, Bose D, Ghosh D, Jana B, Bhattacharya B, Sarkar D, Chattopadhyay N. Studies of Triton X-165–β-cyclodextrin interactions using both extrinsic and intrinsic fluorescence. J Colloid Interface Sci 2010; 347:252-9. [DOI: 10.1016/j.jcis.2010.03.048] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2010] [Revised: 03/20/2010] [Accepted: 03/23/2010] [Indexed: 10/19/2022]
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75
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Induced surface activity of supramolecular cyclodextrin–statin complexes: Relevance in drug delivery. Colloids Surf A Physicochem Eng Asp 2010. [DOI: 10.1016/j.colsurfa.2009.09.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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76
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Radozkowicz L, Project E, Gepshtein R, Nachliel E, Huppert D, Gutman M. The Effect of Environment on the Dynamics of Proton Dissociation in Water. Z PHYS CHEM 2009. [DOI: 10.1524/zpch.2008.5386] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Abstract
The effect of the local ordering of water molecules, adjacent to the molecular surface, on the dynamics of excited state proton transfer to bulk was monitored with the pyranine-γ-CD inclusion complex as a model. The bound pyranine (a commonly used photoacid) exhibits slower dissociation dynamics, with activation energy of the proton dissociation reaction that is significantly higher than that of the reaction of the free pyranine. To understand the source of these modulations of the rate constants, the interaction of the pyranine with the water was investigated by molecular dynamics calculations. The solvation patterns of both; the pyranine and γ-CD, differ in the complex from that of the free compounds. In the case of the pyranine´s hydroxyl, the inclusion in the torus of the γ-CD reduces the number of water molecules in its immediate vicinity and their ordering, thus accounting for the variation in the rates of the proton transfer reactions. On increasing the temperature, the water of the pyranine´s hydroxyl third solvation shell, but not those of the first and the second shell, lose their strict orientation, thus facilitating the dissociation of the pyranine.
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77
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Haller J, Kaatze U. Octylglucopyranoside and cyclodextrin in water. Self-aggregation and complex formation. J Phys Chem B 2009; 113:1940-7. [PMID: 19170546 DOI: 10.1021/jp808733p] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
At 25 degrees C ultrasonic attenuation spectra between 100 kHz and 400 MHz as well as sound velocities and densities of aqueous solutions of the surfactant n-octyl-beta-d-glucopyranoside and of the cage compound alpha-cyclodextrin have been measured. The liquid system reveals a critical association concentration (cac) exceeding the cmc of the surfactant almost by the cyclodextrin concentration and thus indicating a significant formation of cyclodextrin-surfactant inclusion complexes. The ultrasonic spectra display altogether four relaxation regions. The one with largest relaxation time (0.27 mus < or = tau(1) < or = 1.6 mus) exhibits a noticeable amplitude at surfactant concentrations larger than the cac only. It is assigned to the monomer exchange between the micelles and the suspending phase. A term with relaxation time tau(2) (33 ns < or = tau(2) < or = 135 ns) is characteristic for solutions containing both solutes. It is assumed to reflect the inclusion complex formation. Complexes with 1:1, 2:1, and 1:2 stoichiometry appear to exist. The terms at higher frequencies (4.8 ns < or = tau(3) < or = 9.8 ns; 0.8 ns <or = tau(4) < or = 2 ns) are due to fluctuations of the carbohydrate residues around the glucosidic bond angles and to the rotational isomerization of the exocyclic hydroxymethyl groups, respectively.
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Affiliation(s)
- Julian Haller
- Drittes Physikalisches Institut, Georg-August-Universitat, Friedrich-Hund-Platz 1, 37077 Gottingen, Germany
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78
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Nogueiras-Nieto L, Alvarez-Lorenzo C, Sandez-Macho I, Concheiro A, Otero-Espinar FJ. Hydrosoluble Cyclodextrin/Poloxamer Polypseudorotaxanes at the Air/Water Interface, in Bulk Solution, and in the Gel State. J Phys Chem B 2009; 113:2773-82. [DOI: 10.1021/jp809806w] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Luis Nogueiras-Nieto
- Departamento de Farmacia y Tecnologia Farmaceutica and Departamento de Quimica Fisica, Universidad de Santiago de Compostela, 15782-Santiago de Compostela, Spain
| | - Carmen Alvarez-Lorenzo
- Departamento de Farmacia y Tecnologia Farmaceutica and Departamento de Quimica Fisica, Universidad de Santiago de Compostela, 15782-Santiago de Compostela, Spain
| | - Isabel Sandez-Macho
- Departamento de Farmacia y Tecnologia Farmaceutica and Departamento de Quimica Fisica, Universidad de Santiago de Compostela, 15782-Santiago de Compostela, Spain
| | - Angel Concheiro
- Departamento de Farmacia y Tecnologia Farmaceutica and Departamento de Quimica Fisica, Universidad de Santiago de Compostela, 15782-Santiago de Compostela, Spain
| | - Francisco J. Otero-Espinar
- Departamento de Farmacia y Tecnologia Farmaceutica and Departamento de Quimica Fisica, Universidad de Santiago de Compostela, 15782-Santiago de Compostela, Spain
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79
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Cao M, Deng M, Wang XL, Wang Y. Decompaction of Cationic Gemini Surfactant-Induced DNA Condensates by β-Cyclodextrin or Anionic Surfactant. J Phys Chem B 2008; 112:13648-54. [DOI: 10.1021/jp803244f] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Meiwen Cao
- Key Laboratory of Colloid and Interface Science, Institute of Chemistry, and Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, Peopleʼs Republic of China
| | - Manli Deng
- Key Laboratory of Colloid and Interface Science, Institute of Chemistry, and Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, Peopleʼs Republic of China
| | - Xiao-Ling Wang
- Key Laboratory of Colloid and Interface Science, Institute of Chemistry, and Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, Peopleʼs Republic of China
| | - Yilin Wang
- Key Laboratory of Colloid and Interface Science, Institute of Chemistry, and Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, Peopleʼs Republic of China
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80
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Bai Y, Xu GY, Xin X, Sun HY, Zhang HX, Hao AY, Yang XD, Yao L. Interaction between cetyltrimethylammonium bromide and β-cyclodextrin: surface tension and interfacial dilational viscoelasticity studies. Colloid Polym Sci 2008. [DOI: 10.1007/s00396-008-1918-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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81
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Hernández-Pascacio J, Banquy X, Pérez-Casas S, Costas M, Amigo A, Piñeiro A. A small molecular size system giving unexpected surface effects: alpha-Cyclodextrin + sodium dodecyl sulfate in water. J Colloid Interface Sci 2008; 328:391-5. [PMID: 18829044 DOI: 10.1016/j.jcis.2008.09.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2008] [Revised: 08/28/2008] [Accepted: 09/01/2008] [Indexed: 11/30/2022]
Abstract
Maximum drop volumes (MDV) and the resultant surface tension values (sigma) of alpha-cyclodextrin (alpha-CD) + sodium dodecyl sulfate (SDS) aqueous mixtures have been determined over a broad concentration range of both solutes at 283.15, 293.15, 303.15, 313.15, and 323.15 K. Drops significantly larger than those of pure water (up to approximately 25% larger) were observed at low temperatures for solutions with [alpha-CD]/[SDS] concentration ratios, approximately > 2, producing unexpectedly high surface tension values. Our results indicate that at certain solute concentration ratios and temperatures, the drop volume method provides wrong values for equilibrium surface tensions. This is due to the high viscoelasticity of the surface film whose effect is important even though the injection rate of the drops was slow and the solutes molecular sizes are small.
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Affiliation(s)
- Jorge Hernández-Pascacio
- Laboratorio de Biofisicoquímica, Departamento de Fisicoquímica, Facultad de Química, Universidad Nacional Autónoma de México, Cd Universitaria, México D.F. 04510, Mexico
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82
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Haller J, Kaatze U. Complexation versus micelle formation: α-Cyclodextrin+n-decyltrimethylammonium bromide aqueous solutions. Chem Phys Lett 2008. [DOI: 10.1016/j.cplett.2008.08.035] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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83
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Hernández-Pascacio J, Garza C, Banquy X, Díaz-Vergara N, Amigo A, Ramos S, Castillo R, Costas M, Piñeiro A. Cyclodextrin-based self-assembled nanotubes at the water/air interface. J Phys Chem B 2007; 111:12625-30. [PMID: 17941668 DOI: 10.1021/jp076576t] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Native alpha-cyclodextrin (alpha-CD) is found to spontaneously form films at aqueous solution/air interfaces. Shape-response measurements to volume perturbations on drops hanging from a capillary indicate that temperature and sodium dodecyl sulfate (SDS) concentration strongly modify the viscoelastic properties of such films. By using isothermal titration calorimetry (ITC), Brewster angle microscopy (BAM), atomic force microscopy (AFM), and molecular dynamics (MD) simulations, it is shown that the films consist of self-assembled nanotubes whose building blocks are cyclodextrin dimers (alpha-CD2) and alpha-CD2-SDS1 complexes.
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84
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Olvera A, Pérez-Casas S, Costas M. Heat Capacity Contributions to the Formation of Inclusion Complexes. J Phys Chem B 2007; 111:11497-505. [PMID: 17850130 DOI: 10.1021/jp072098a] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
An analysis scheme for the formation of the inclusion complexes in water is presented. It is exemplified for the case where the host is alpha-cyclodextrin and the guest is a linear alcohol (1-propanol to 1-octanol) or the isomers of 1-pentanol. Eight transfer isobaric heat capacities, DeltatCp, involving different initial and final states are evaluated at infinite dilution of the guest using both data determined in this work and from the literature. Apart from the usual definition for the inclusion heat capacity change, three inclusion transfers are used. The sign of each DeltatCp indicates if the transfer is an order-formation or an order-destruction process. From the DeltatCp data, the main contributions to the heat capacity of cyclodextrin complexation, namely, those due to dehydration of the hydrophobic section of the guest molecule, H-bond formation, formation of hydrophobic interactions, and release of water molecules from the cyclodextrin cavity, are estimated. The relative weight of each of these contributions to the DeltatCp values is discussed, providing a better characterization of the molecular recognition process involved in the inclusion phenomena.
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Affiliation(s)
- Angeles Olvera
- Laboratorio de Biofisicoquímica, Departamento de Fisicoquímica, Facultad de Química, Universidad Nacional Autónoma de México, Cd. Universitaria, México D. F. 04510, México
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