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Utzeri G, Murtinho D, Maria TM, Pais AA, Sannino F, Valente AJ. Amine-β-cyclodextrin-based nanosponges. The role of cyclodextrin amphiphilicity in the imidacloprid uptake. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2021.128044] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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2
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Mandal HK, Patel BK, Saha S, Saha S, Mahapatra A. Effect of cyclodextrins’ cavity on the kinetics of alkaline hydrolysis of tris(1,10-Phenanthroline)Fe(II) in presence of surfactant. J DISPER SCI TECHNOL 2021. [DOI: 10.1080/01932691.2021.1993891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
| | - Biman Kumar Patel
- Department of Chemistry, Jadavpur University, Kolkata, West Bengal, India
| | - Suman Saha
- Department of Chemistry, Jadavpur University, Kolkata, West Bengal, India
| | - Sushanta Saha
- Department of Chemistry, Sree Chaitanya College, Habra, West Bengal, India
| | - Ambikesh Mahapatra
- Department of Chemistry, Jadavpur University, Kolkata, West Bengal, India
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3
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Filho CMC, Bueno PVA, Matsushita AFY, Vilsinski BH, Rubira AF, Muniz EC, Murtinho DMB, Valente AJM. Uncommon Sorption Mechanism of Aromatic Compounds onto Poly(Vinyl Alcohol)/Chitosan/Maleic Anhydride-β-Cyclodextrin Hydrogels. Polymers (Basel) 2020; 12:E877. [PMID: 32290255 PMCID: PMC7652220 DOI: 10.3390/polym12040877] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Revised: 04/06/2020] [Accepted: 04/08/2020] [Indexed: 11/24/2022] Open
Abstract
Aromatic hydrocarbons are extensive environmental pollutants occurring in both water and air media, and their removal is a priority effort for a healthy environment. The use of adsorbents is among the several strategies used for the remediation of these compounds. In this paper, we aim the synthesis of an amphiphilic hydrogel with the potential for the simultaneous sorption of a set of monocyclic and polycyclic aromatic hydrocarbons associated with toxicity effects in humans. Thus, we start by the synthesis of a copolymer-based in chitosan and β-cyclodextrin previously functionalized with the maleic anhydride. The presence of β-cyclodextrin will confer the ability to interact with hydrophobic compounds. The resulting material is posteriorly incorporated in a cryogel of poly(vinyl alcohol) matrix. We aim to improve the amphiphilic ability of the hydrogel matrix. The obtained hydrogel was characterized by swelling water kinetics, thermogravimetric analysis, rheological measurements, and scanning electron microscopy. The sorption of aromatic hydrocarbons onto the gel is characterized by pseudo-first-order kinetics and Henry isotherm, suggesting a physisorption mechanism. The results show that the presence of maleic anhydride-β-cyclodextrin and chitosan into hydrogels leads to an increase in the removal efficiency of the aromatic compounds. Additionally, the capacity of this hydrogel for removing these pollutants from a fossil fuel sample has also been tested.
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Affiliation(s)
- Cesar M. C. Filho
- Department of Chemistry, CQC, University of Coimbra, 3004-535 Coimbra, Portugal; (A.F.Y.M.); (B.H.V.); (D.M.B.M.)
- BRinova Biochemistry Lda., R. Fernanda Seno, 6, 7005-485 Évora, Portugal
| | - Pedro V. A. Bueno
- Grupo de Materiais Poliméricos e Compósitos (GMPC)-Departamento de Química, Universidade Estadual de Maringá, UEM, Maringá 87020-900, Brazil; (P.V.A.B.); (A.F.R.); (E.C.M.)
| | - Alan F. Y. Matsushita
- Department of Chemistry, CQC, University of Coimbra, 3004-535 Coimbra, Portugal; (A.F.Y.M.); (B.H.V.); (D.M.B.M.)
| | - Bruno H. Vilsinski
- Department of Chemistry, CQC, University of Coimbra, 3004-535 Coimbra, Portugal; (A.F.Y.M.); (B.H.V.); (D.M.B.M.)
- Grupo de Materiais Poliméricos e Compósitos (GMPC)-Departamento de Química, Universidade Estadual de Maringá, UEM, Maringá 87020-900, Brazil; (P.V.A.B.); (A.F.R.); (E.C.M.)
| | - Adley F. Rubira
- Grupo de Materiais Poliméricos e Compósitos (GMPC)-Departamento de Química, Universidade Estadual de Maringá, UEM, Maringá 87020-900, Brazil; (P.V.A.B.); (A.F.R.); (E.C.M.)
| | - Edvani C. Muniz
- Grupo de Materiais Poliméricos e Compósitos (GMPC)-Departamento de Química, Universidade Estadual de Maringá, UEM, Maringá 87020-900, Brazil; (P.V.A.B.); (A.F.R.); (E.C.M.)
- Post-graduate Program on Materials Science & Engineering, Federal University of Technology, Paraná (UTFPR-LD), Londrina 86036-370, Brazil
- Department of Chemistry, Federal University of Piauí, Teresina CEP 64049-550, Brazil
| | - Dina M. B. Murtinho
- Department of Chemistry, CQC, University of Coimbra, 3004-535 Coimbra, Portugal; (A.F.Y.M.); (B.H.V.); (D.M.B.M.)
| | - Artur J. M. Valente
- Department of Chemistry, CQC, University of Coimbra, 3004-535 Coimbra, Portugal; (A.F.Y.M.); (B.H.V.); (D.M.B.M.)
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4
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Kumari S, Halder S, Aggrawal R, Aswal VK, Sundar G, Saha SK. Refolding of protein unfolded by gemini surfactants using β-cyclodextrin and sodium dodecyl sulfate in aqueous medium: Study on role of spacer chain of surfactants. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2019.112238] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Martín VI, López-Cornejo P, López-López M, Blanco-Arévalo D, Moreno-Vargas AJ, Angulo M, Laschewsky A, Moyá ML. Influence of the surfactant degree of oligomerization on the formation of cyclodextrin: surfactant inclusion complexes. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2018.04.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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6
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Pisárčik M, Pupák M, Lukáč M, Devínsky F, Hubčík L, Bukovský M, Horváth B. The Synthesis, Self-Assembled Structures, and Microbicidal Activity of Cationic Gemini Surfactants with Branched Tridecyl Chains. Molecules 2019; 24:molecules24234380. [PMID: 31801214 PMCID: PMC6930597 DOI: 10.3390/molecules24234380] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Revised: 11/25/2019] [Accepted: 11/28/2019] [Indexed: 01/08/2023] Open
Abstract
Cationic gemini surfactants with polymethylene spacer and linear alkyl chains containing an even number of carbon atoms have been extensively studied in the recent past, with the emphasis put on the determination of their aggregation behaviour in aqueous solution and their biological properties. However, the information on the aggregation of branched gemini surfactants with an odd number of carbon atoms in their alkyl chains is only sparsely reported in the literature. To help cover this gap in the research of cationic gemini surfactants, a series of branched bisammonium cationic gemini surfactants with an odd number of carbon atoms in alkyl chains (tridecane-2-yl chains) and a polymethylene spacer with a variable length ranging from 3 to 12 carbon atoms have been synthesized and investigated. Critical micelle concentration, which was determined by three methods, was found to be in the order 10-4 mol/L. A comparison of the obtained data of the novel series of tridecyl chain geminis with those of gemini surfactants with dodecyl chains and an identical spacer structure revealed that structural differences between both series of gemini surfactants result in different aggregation and surface properties for surfactants with 6 and 8 methylene groups in the spacer (N,N'-bis(tridecane-2-yl)-N,N,N',N'-tetramethylhexane-1,6-diaminium dibromide and N,N'-bis(tridecane-2-yl)-N,N,N',N'-tetramethyloctane-1,8-diaminium dibromide) with the cmc values 8.2 × 10-4 mol/L and 6.5 × 10-4 mol/L, respectively, as determined by surface tension measurements. Particle size analysis showed the formation of small stable spherical micelles in the interval between 2.8 and 5 nm and with zeta potential around +50 mV, which are independent of surfactant concentration and increase with the increasing spacer length. Microbicidal activity of 13-s-13 gemini surfactants was found to be efficient against Gram-positive, Gram-negative bacteria and yeast.
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Affiliation(s)
- Martin Pisárčik
- Department of Chemical Theory of Drugs, Faculty of Pharmacy, Comenius University, SK-83232 Bratislava, Slovakia;
- Correspondence:
| | - Matúš Pupák
- State Institute for Drug Control, SK-82508 Bratislava, Slovakia;
| | - Miloš Lukáč
- Department of Chemical Theory of Drugs, Faculty of Pharmacy, Comenius University, SK-83232 Bratislava, Slovakia;
| | | | - Lukáš Hubčík
- Department of Physical Chemistry of Drugs, Faculty of Pharmacy, Comenius University, SK-83232 Bratislava, Slovakia;
| | - Marián Bukovský
- Department of Cell and Molecular Biology of Drugs, Faculty of Pharmacy, Comenius University, SK-83232 Bratislava, Slovakia;
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Zhu B, Jia L, Guo X, Yin J, Zhao Z, Chen N, Chen S, Jia Y. Controllable assembly of a novel cationic gemini surfactant containing a naphthalene and amide spacer with β-cyclodextrin. SOFT MATTER 2019; 15:3198-3207. [PMID: 30896008 DOI: 10.1039/c9sm00172g] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
A novel cationic gemini surfactant (C12NDDA) with a spacer containing naphthalene and amides was successfully synthesized. The assembly of C12NDDA with β-cyclodextrin (β-CD) was investigated using various techniques including transmission electron microscopy, proton nuclear magnetic resonance (1H NMR), and scanning electron microscopy. Tuning the C12NDDA concentration and the C12NDDA/β-CD molar ratio allowed the production of different assembled aggregate morphologies such as micelles, vesicles, nanowires, nanorods, and hydrogels. Investigation of the inclusion mechanisms of C12NDDA and β-CD by 1H NMR revealed that hydrophobic interactions, hydrogen bonding, π-π stacking, and electrostatic forces play key roles in the assembly process. The antimicrobial activities of the C12NDDA/xβ-CD (x = 0-4) inclusion complexes were tested against Gram-negative bacteria (Escherichia coli and Salmonella) and Gram-positive bacteria (Staphylococcus aureus and Streptococcus), and very low minimum inhibitory concentrations of 0.078-0.31 μg mL-1 were observed. Thus, this newly synthesized gemini surfactant and its inclusion complexes exhibit potential as superior broad-spectrum disinfectants for various biomedical and biotechnological applications.
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Affiliation(s)
- Bo Zhu
- College of Chemistry and Chemical Engineering, Key Laboratory of Fine Chemicals of College of Heilongjiang Province, Qiqihar University, Qiqihar 161006, China.
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8
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Influence of the cyclodextrin nature on the decompaction of dimeric cationic surfactant-DNA complexes. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.06.066] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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9
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Filho CMC, Bueno PVA, Matsushita AFY, Rubira AF, Muniz EC, Durães L, Murtinho DMB, Valente AJM. Synthesis, characterization and sorption studies of aromatic compounds by hydrogels of chitosan blended with β-cyclodextrin- and PVA-functionalized pectin. RSC Adv 2018; 8:14609-14622. [PMID: 35540733 PMCID: PMC9079937 DOI: 10.1039/c8ra02332h] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Accepted: 04/11/2018] [Indexed: 11/21/2022] Open
Abstract
Complex coacervation of chitosan with β-cyclodextrin- and poly(vinyl alcohol)-functionalized pectin: ability for simultaneous removal of six different aromatic compounds.
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Affiliation(s)
- Cesar M. C. Filho
- CQC
- Department of Chemistry
- University of Coimbra
- 3004-535 Coimbra
- Portugal
| | - Pedro V. A. Bueno
- Grupo de Materiais Poliméricos e Compósitos (GMPC) – Departamento de Química
- Universidade Estadual de Maringá
- UEM
- Maringá
- Brazil
| | | | - Adley F. Rubira
- Grupo de Materiais Poliméricos e Compósitos (GMPC) – Departamento de Química
- Universidade Estadual de Maringá
- UEM
- Maringá
- Brazil
| | - Edvani C. Muniz
- Grupo de Materiais Poliméricos e Compósitos (GMPC) – Departamento de Química
- Universidade Estadual de Maringá
- UEM
- Maringá
- Brazil
| | - Luísa Durães
- CIEPQPF
- Department of Chemical Engineering
- University of Coimbra
- 3030-790 Coimbra
- Portugal
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Cova TFGG, Nunes SCC, Pais AACC. Free-energy patterns in inclusion complexes: the relevance of non-included moieties in the stability constants. Phys Chem Chem Phys 2017; 19:5209-5221. [DOI: 10.1039/c6cp08081b] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A MD/PMF-based procedure is designed for quantification of the interaction and respective components, guiding complex formation in water between β-CD and several naphthalene derivatives, highlighting the relevance of substituents.
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Affiliation(s)
- Tânia F. G. G. Cova
- Coimbra Chemistry Centre
- Department of Chemistry
- University of Coimbra
- 3004-535 Coimbra
- Portugal
| | - Sandra C. C. Nunes
- Coimbra Chemistry Centre
- Department of Chemistry
- University of Coimbra
- 3004-535 Coimbra
- Portugal
| | - Alberto A. C. C. Pais
- Coimbra Chemistry Centre
- Department of Chemistry
- University of Coimbra
- 3004-535 Coimbra
- Portugal
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11
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Medronho B, Duarte H, Alves L, Antunes FE, Romano A, Valente AJ. The role of cyclodextrin-tetrabutylammonium complexation on the cellulose dissolution. Carbohydr Polym 2016; 140:136-43. [DOI: 10.1016/j.carbpol.2015.12.026] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2015] [Revised: 12/03/2015] [Accepted: 12/10/2015] [Indexed: 11/28/2022]
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12
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Pisárčik M, Jampílek J, Devínsky F, Drábiková J, Tkacz J, Opravil T. Gemini Surfactants with Polymethylene Spacer: Supramolecular Structures at Solid Surface and Aggregation in Aqueous Solution. J SURFACTANTS DETERG 2016. [DOI: 10.1007/s11743-016-1797-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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13
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Poorghorban M, Karoyo AH, Grochulski P, Verrall RE, Wilson LD, Badea I. A 1H NMR Study of Host/Guest Supramolecular Complexes of a Curcumin Analogue with β-Cyclodextrin and a β-Cyclodextrin-Conjugated Gemini Surfactant. Mol Pharm 2015; 12:2993-3006. [DOI: 10.1021/acs.molpharmaceut.5b00261] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Masoomeh Poorghorban
- Drug
Discovery and Development Research Group, College of Pharmacy and
Nutrition, University of Saskatchewan, Saskatoon, Saskatchewan, S7N 5E5, Canada
| | - Abdalla H. Karoyo
- Department
of Chemistry, University of Saskatchewan, Saskatoon, Saskatchewan, S7N 5C9, Canada
| | - Pawel Grochulski
- Drug
Discovery and Development Research Group, College of Pharmacy and
Nutrition, University of Saskatchewan, Saskatoon, Saskatchewan, S7N 5E5, Canada
- Canadian Light Source, Saskatoon, Saskatchewan, S7N 2 V3, Canada
| | - Ronald E. Verrall
- Department
of Chemistry, University of Saskatchewan, Saskatoon, Saskatchewan, S7N 5C9, Canada
| | - Lee D. Wilson
- Department
of Chemistry, University of Saskatchewan, Saskatoon, Saskatchewan, S7N 5C9, Canada
| | - Ildiko Badea
- Drug
Discovery and Development Research Group, College of Pharmacy and
Nutrition, University of Saskatchewan, Saskatoon, Saskatchewan, S7N 5E5, Canada
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Valente AJM, Carvalho RA, Söderman O. Do Cyclodextrins Aggregate in Water? Insights from NMR Experiments. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:6314-6320. [PMID: 26017565 DOI: 10.1021/acs.langmuir.5b01493] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
One decade ago Bonini et al. [Langmuir 2006, 22, 1478-1484] reported the occurrence of aggregates of β-cyclodextrin in aqueous solutions with sizes in the range from 90 nm to a few micrometers. The experimental technique used was cryo-TEM. This work followed a number of previous studies involving other physical parameters, such as viscosities and activity coefficients, the results of which were interpreted in terms of self-aggregation of cyclodextrins. Since then, the ability of cyclodextrins to self-assemble were often used to explain and rationalize the supramolecular mechanisms involving cyclodextrins. Here, the question of aggregation of native cyclodextrins (α-, β-, and γ-) in aqueous solutions is addressed by using (1)H NMR techniques, including NMR diffusometry, relaxometry, and proton peak intensities. Within the detection limit of the NMR experiments, no aggregates of cyclodextrin were observed. If aggregates are present, the fraction of cyclodextrin in aggregates is quite small-less than 1%. However, we cannot exclude the presence of transient clusters involving several cyclodextrin molecules where the lifetime of the cluster is short.
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Affiliation(s)
| | | | - Olle Söderman
- §Division of Physical Chemistry, Department of Chemistry, Lund University, PO Box 124, S-221 00 Lund, Sweden
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Poorghorban M, Das U, Alaidi O, Chitanda JM, Michel D, Dimmock J, Verrall R, Grochulski P, Badea I. Characterization of the host-guest complex of a curcumin analog with β-cyclodextrin and β-cyclodextrin-gemini surfactant and evaluation of its anticancer activity. Int J Nanomedicine 2015; 10:503-15. [PMID: 25609956 PMCID: PMC4298337 DOI: 10.2147/ijn.s70828] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Background Curcumin analogs, including the novel compound NC 2067, are potent cytotoxic agents that suffer from poor solubility, and hence, low bioavailability. Cyclodextrin-based carriers can be used to encapsulate such agents. In order to understand the interaction between the two molecules, the physicochemical properties of the host–guest complexes of NC 2067 with β-cyclodextrin (CD) or β-cyclodextrin–gemini surfactant (CDgemini surfactant) were investigated for the first time. Moreover, possible supramolecular structures were examined in order to aid the development of new drug delivery systems. Furthermore, the in vitro anticancer activity of the complex of NC 2067 with CDgemini surfactant nanoparticles was demonstrated in the A375 melanoma cell line. Methods Physicochemical properties of the complexes formed of NC 2067 with CD or CDgemini surfactant were investigated by synchrotron-based powder X-ray diffraction, Fourier-transform infrared spectroscopy, and thermogravimetric analysis. Synchrotron-based small- and wide-angle X-ray scattering and size measurements were employed to assess the supramolecular morphology of the complex formed by NC 2067 with CDgemini surfactant. Lastly, the in vitro cell toxicity of the formulations toward A375 melanoma cells at various drug-to-carrier mole ratios were measured by cell viability assay. Results Physical mixtures of NC 2067 and CD or CDgemini surfactant showed characteristics of the individual components, whereas the complex of NC 2067 and CD or CDgemini surfactant presented new structural features, supporting the formation of the host–guest complexes. Complexes of NC 2067 with CDgemini surfactants formed nanoparticles having sizes of 100–200 nm. NC 2067 retained its anticancer activity in the complex with CDgemini surfactant for different drug-to-carrier mole ratios, with an IC50 (half-maximal inhibitory concentration) value comparable to that for NC 2067 without the carrier. Conclusion The formation of host–guest complexes of NC 2067 with CD or CDgemini surfactant has been confirmed and hence the CDgemini surfactant shows good potential to be used as a delivery system for anticancer agents.
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Affiliation(s)
- Masoomeh Poorghorban
- Drug Discovery and Development Research Group, College of Pharmacy and Nutrition, University of Saskatchewan, Saskatoon, SK, Canada
| | - Umashankar Das
- Department of Chemical and Biological Engineering, University of Saskatchewan, Saskatoon, SK, Canada
| | - Osama Alaidi
- Drug Discovery and Development Research Group, College of Pharmacy and Nutrition, University of Saskatchewan, Saskatoon, SK, Canada
| | - Jackson M Chitanda
- Department of Chemical and Biological Engineering, University of Saskatchewan, Saskatoon, SK, Canada
| | - Deborah Michel
- Drug Discovery and Development Research Group, College of Pharmacy and Nutrition, University of Saskatchewan, Saskatoon, SK, Canada
| | - Jonathan Dimmock
- Drug Discovery and Development Research Group, College of Pharmacy and Nutrition, University of Saskatchewan, Saskatoon, SK, Canada
| | - Ronald Verrall
- Department of Chemistry, University of Saskatchewan, Saskatoon, SK, Canada
| | - Pawel Grochulski
- Drug Discovery and Development Research Group, College of Pharmacy and Nutrition, University of Saskatchewan, Saskatoon, SK, Canada ; Canadian Light Source, Saskatoon, SK, Canada
| | - Ildiko Badea
- Drug Discovery and Development Research Group, College of Pharmacy and Nutrition, University of Saskatchewan, Saskatoon, SK, Canada
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16
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Benkő M, Király LA, Puskás S, Király Z. Complexation of β-cyclodextrin with a gemini surfactant studied by isothermal titration microcalorimetry and surface tensiometry. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:6756-6762. [PMID: 24846443 DOI: 10.1021/la501386j] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We report on the inclusion complex formation of β-cyclodextrin (βCD) with a cocogem surfactant (counterion-coupled gemini surfactant; (bis(4-(2-alkyl)benzenesulfonate)-Jeffamine salt, abbreviated as ABSJ), studied by isothermal titration calorimetry (ITC) and surface tension (SFT) measurements. We measured the critical micelle concentration (cmc) of ABSJ in water by the two experimental techniques in the temperature range 283-343 K, and determined the thermodynamic parameters of the complex formation directly by ITC and indirectly by the SFT. The stoichiometry (N), the binding constant (K), and the enthalpy of complexation were determined, and the Gibbs free energy and the entropy term were calculated from the experimental data. A novel method is presented for the determination of N and K by using surface tensiometry.
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Affiliation(s)
- Mária Benkő
- Department of Physical Chemistry and Materials Science, University of Szeged , Aradi Vt. 1, H-6720 Szeged, Hungary
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17
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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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18
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Inclusion complexes of rosmarinic acid and cyclodextrins: stoichiometry, association constants, and antioxidant potential. Colloid Polym Sci 2013. [DOI: 10.1007/s00396-013-3124-5] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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20
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Interactions between β-cyclodextrin and an amino acid-based anionic gemini surfactant derived from cysteine. J Colloid Interface Sci 2012; 367:286-92. [DOI: 10.1016/j.jcis.2011.07.101] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2011] [Revised: 07/23/2011] [Accepted: 07/25/2011] [Indexed: 11/24/2022]
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Almeida JAS, Pinto SPR, Wang Y, Marques EF, Pais AACC. Structure and order of DODAB bilayers modulated by dicationic gemini surfactants. Phys Chem Chem Phys 2011; 13:13772-82. [PMID: 21720610 DOI: 10.1039/c1cp20477g] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Cationic liposomes have been extensively studied from the experimental and theoretical standpoints, motivated both by their fundamental interest and by potential applications in drug delivery and gene therapy. However, a detailed understanding of the nature of interactions within mixed bilayers containing cationic gemini surfactants is still lacking. This work focuses on the structural and dynamic properties of DODAB membranes in the presence of dicationic gemini surfactants. A thermodynamic characterization of the phase transitions in the mixed systems has been carried out by differential scanning calorimetry, while insight into the molecular interactions in the bilayer has been provided by molecular dynamics. For this purpose, variations in the gemini spacer and tail length, as well as in the respective molar fraction, have been included in both experimental and simulation studies. The results indicate that the influence of cationic gemini surfactants upon the thermotropic behavior and degree of order of DODAB structures is controlled by a complex interplay between charge density, conformation and hydrophobic effects, for which a detailed rationale is provided.
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Affiliation(s)
- João A S Almeida
- Chemistry Department, University of Coimbra, Rua Larga 3004-535 Coimbra, Portugal.
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Liu G, Gu D, Liu H, Ding W, Li Z. Enthalpy–entropy compensation of ionic liquid-type Gemini imidazolium surfactants in aqueous solutions: A free energy perturbation study. J Colloid Interface Sci 2011; 358:521-6. [DOI: 10.1016/j.jcis.2011.03.064] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2011] [Revised: 03/13/2011] [Accepted: 03/16/2011] [Indexed: 11/16/2022]
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