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Guimarães PPG, de Menezes AC, Teixeira KIR, Denadai ÂML, Fills RA, Cortés ME, Sinisterra RD. Enhanced efficacy against bacterial biofilms via host:guest cyclodextrin‐doxycycline inclusion complexes. J INCL PHENOM MACRO 2021. [DOI: 10.1007/s10847-020-01041-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Chakraborty S, Ghosh P, Basu B, Mandal A. Inclusion complex of β-cyclodextrin with tetrabutylammonium bromide: Synthesis, characterization and interaction with calf thymus DNA. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111525] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Hydrophobic nanoprecipitates formed by benzoylphenylureas and β-cyclodextrin inclusion compounds: synthesis, characterization and toxicity against aedes aegypti larvae. Heliyon 2019; 5:e02013. [PMID: 31321326 PMCID: PMC6612800 DOI: 10.1016/j.heliyon.2019.e02013] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 06/24/2019] [Accepted: 06/25/2019] [Indexed: 12/20/2022] Open
Abstract
The aim of this work was to synthesize and characterize the inclusion compounds formed by the complexation of β-cyclodextrin (βCD) with insecticides from the class of benzoylphenylureas (BPUs), named novaluron (NOV) and diflubenzuron (DIF), beyond evaluate their larvicidal activity against Aedes aegypti larvae. Solid state characterization by FTIR showed changes in the main peaks of BPUs and βCD, suggesting the formation of inclusion compounds in solid phase. DTA and TGA thermal analysis showed changes in temperatures of BPUs decomposition as result of molecular interactions. 1H NMR experiments allowed to observe the occurrence of interactions in solution through changes in chemical shifts of BPUs aromatic hydrogens. However, the presence of H–H intermolecular correlations in 2D ROESY was found only for the DIF/βCD complex, suggesting different topology for each complex. Such hypothesis was corroborated by thermodynamic analysis using ITC, which showed different profile of titration curves, beyond endothermic and exothermic interactions for NOV/βCD and DIF/βCD complexes, respectively. DLS titrations of BPUs or BPUs/βCD DMSO solutions in aqueous solution demonstrated that the spontaneously formed hydrophobic nanoprecipitates (HNPs) have different profile of sizes depending on the BPU/βCD system, corroborating also with the hypothesis about the existence of different topologies for each complex. Finally, the HNPs of inclusion compounds showed to be more efficient than free BPUs, allowing proposing a new insecticide formulation.
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Inclusion vs. micellization in the cethylpyridine chloride / β-cyclodextrin system: A structural and thermodynamic approach. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.02.033] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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De Paula WX, Denadai ÂML, Braga ANG, Shastri VP, Pinheiro SVB, Frezard F, Santos RAS, Sinisterra RD. A long-lasting oral preformulation of the angiotensin II AT1 receptor antagonist losartan. Drug Dev Ind Pharm 2018; 44:1498-1505. [PMID: 29683352 DOI: 10.1080/03639045.2018.1467923] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Losartan (Los), a non-peptidic orally active agent, reduces arterial pressure through specific and selective blockade of angiotensin II receptor AT1. However, this widely used AT1 antagonist presents low bioavailability and needs once or twice a day dosage. In order to improve its bioavailability, we used the host: guest strategy based on β-cyclodextrin (βCD). The results suggest that Los included in βCD showed a typical pulsatile release pattern after oral administration to rats, with increasing the levels of plasma of Los. In addition, the inclusion compound presented oral efficacy for 72 h, in contrast to Los alone, which shows antagonist effect for only 6 h. In transgenic (mREN2)L27 rats, the Los/βCD complex reduced blood pressure for about 6 d, whereas Los alone reduced blood pressure for only 2 d. More importantly, using this host: guest strategy, sustained release of Los for over a week via the oral route can be achieved without the need for encapsulation in a polymeric carrier. The proposed preformulation increased the efficacy reducing the dose or spacing between each dose intake.
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Affiliation(s)
- Washington X De Paula
- a Laboratório de Encapsulamento Molecular e Biomateriais (LEMB), Chemistry Department, Universidade Federal de Minas Gerais (UFMG) , Belo Horizonte , MG , Brazil
| | - Ângelo M L Denadai
- b Laboratório de Nanotecnologia dos Fluidos Complexos, Pharmacy Department, Universidade Federal de Juiz de Fora (UFJF) , Valadares , MG , Brazil
| | - Aline N G Braga
- c Biophysics and Physiology Department , Universidade Federal de Minas Gerais (UFMG) , Belo Horizonte , MG , Brazil
| | - V Prasad Shastri
- d Department of Chemistry , Pharmacy, and Earth Sciences, Institute for Macromolecular Chemistry and BIOSS Centre for Biological Signalling Studies, University of Freiburg , Freiburg , Germany
| | - Sérgio V B Pinheiro
- c Biophysics and Physiology Department , Universidade Federal de Minas Gerais (UFMG) , Belo Horizonte , MG , Brazil
| | - Frederic Frezard
- c Biophysics and Physiology Department , Universidade Federal de Minas Gerais (UFMG) , Belo Horizonte , MG , Brazil
| | - Robson A S Santos
- c Biophysics and Physiology Department , Universidade Federal de Minas Gerais (UFMG) , Belo Horizonte , MG , Brazil
| | - Ruben D Sinisterra
- a Laboratório de Encapsulamento Molecular e Biomateriais (LEMB), Chemistry Department, Universidade Federal de Minas Gerais (UFMG) , Belo Horizonte , MG , Brazil
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Kaldybekova GM, Kemel’bekov US, Abdildanova AA, Praliev KD, Volynkin VA, Nasyrova SR, Imashova SO, Pichkhadze GM. Preparation of an Inclusion Complex of 1-(3-n-butoxypropyl)-4-vinylacetylen-4-benzoyloxypiperidine with B-cyclodextrin and its Local Anesthetic Activity. Pharm Chem J 2014. [DOI: 10.1007/s11094-014-1076-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Suárez DF, Consuegra J, Trajano VC, Gontijo SML, Guimarães PPG, Cortés ME, Denadai ÂL, Sinisterra RD. Structural and thermodynamic characterization of doxycycline/β-cyclodextrin supramolecular complex and its bacterial membrane interactions. Colloids Surf B Biointerfaces 2014; 118:194-201. [PMID: 24816509 DOI: 10.1016/j.colsurfb.2014.01.028] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2013] [Revised: 12/10/2013] [Accepted: 01/20/2014] [Indexed: 10/25/2022]
Abstract
Doxycycline is a semi-synthetic antibiotic commonly used for the treatment of many aerobic and anaerobic bacteria. It inhibits the activity of matrix metalloproteinases (MMPs) and affects cell proliferation. In this study, the structural and thermodynamic parameters of free DOX and a DOX/βCD complex were investigated, as well as their interactions and effects on Staphylococcus aureus cells and cellular cytotoxicity. Complexation of DOX and βCD was confirmed to be an enthalpy- and entropy-driven process, and a low equilibrium constant was obtained. Treatment of S. aureus with higher concentrations of DOX or DOX/βCD resulted in an exponential decrease in S. aureus cell size, as well as a gradual neutralization of zeta potential. These thermodynamic profiles suggest that ion-pairing and hydrogen bonding interactions occur between DOX and the membrane of S. aureus. In addition, the adhesion of βCD to the cell membrane via hydrogen bonding is hypothesized to mediate a synergistic effect which accounts for the higher activity of DOX/βCD against S. aureus compared to pure DOX. Lower cytotoxicity and induction of osteoblast proliferation was also associated with DOX/βCD compared with free DOX. These promising findings demonstrate the potential for DOX/βCD to mediate antimicrobial activity at lower concentrations, and provides a strategy for the development of other antimicrobial formulations.
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Affiliation(s)
- Diego F Suárez
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Av. Antonio Carlos 6627, Pampulha, 31270-901, Belo Horizonte, MG, Brazil
| | - Jessika Consuegra
- Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Antonio Carlos 6627, Pampulha, 31270-901, Belo Horizonte, MG, Brazil
| | - Vivianne C Trajano
- Departamento de Odontologia Restauradora, Faculdade de Odontologia, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Pampulha, 31270-901, Belo Horizonte, MG, Brazil(1)
| | - Sávio M L Gontijo
- Departamento de Odontologia Restauradora, Faculdade de Odontologia, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Pampulha, 31270-901, Belo Horizonte, MG, Brazil(1)
| | - Pedro P G Guimarães
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Av. Antonio Carlos 6627, Pampulha, 31270-901, Belo Horizonte, MG, Brazil
| | - Maria E Cortés
- Departamento de Odontologia Restauradora, Faculdade de Odontologia, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Pampulha, 31270-901, Belo Horizonte, MG, Brazil(1)
| | - Ângelo L Denadai
- Departamento de Farmácia, Universidade Federal de Juiz de Fora, UFJF, Campus Governador Valadares, MG. Av. Dr. Raimundo Monteiro de Rezende 330, Centro, 35010-177, Governador Valadares, MG, Brazil
| | - Rubén D Sinisterra
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Av. Antonio Carlos 6627, Pampulha, 31270-901, Belo Horizonte, MG, Brazil.
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Denadai ÂML, De Sousa FB, Passos JJ, Guatimosim FC, Barbosa KD, Burgos AE, de Oliveira FC, da Silva JC, Neves BRA, Mohallem NDS, Sinisterra RD. Self-assembled organic-inorganic magnetic hybrid adsorbent ferrite based on cyclodextrin nanoparticles. Beilstein J Org Chem 2012; 8:1867-76. [PMID: 23209524 PMCID: PMC3511024 DOI: 10.3762/bjoc.8.215] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2012] [Accepted: 10/04/2012] [Indexed: 01/14/2023] Open
Abstract
Organic-inorganic magnetic hybrid materials (MHMs) combine a nonmagnetic and a magnetic component by means of electrostatic interactions or covalent bonds, and notable features can be achieved. Herein, we describe an application of a self-assembled material based on ferrite associated with β-cyclodextrin (Fe-Ni/Zn/βCD) at the nanoscale level. This MHM and pure ferrite (Fe-Ni/Zn) were used as an adsorbent system for Cr(3+) and Cr(2)O(7) (2-) ions in aqueous solutions. Prior to the adsorption studies, both ferrites were characterized in order to determine the particle size distribution, morphology and available binding sites on the surface of the materials. Microscopy analysis demonstrated that both ferrites present two different size domains, at the micro- and nanoscale level, with the latter being able to self-assemble into larger particles. Fe-Ni/Zn/βCD presented smaller particles and a more homogeneous particle size distribution. Higher porosity for this MHM compared to Fe-Ni/Zn was observed by Brunauer-Emmett-Teller isotherms and positron-annihilation-lifetime spectroscopy. Based on the pKa values, potentiometric titrations demonstrated the presence of βCD in the inorganic matrix, indicating that the lamellar structures verified by transmission electronic microscopy can be associated with βCD assembled structures. Colloidal stability was inferred as a function of time at different pH values, indicating the sedimentation rate as a function of pH. Zeta potential measurements identified an amphoteric behavior for the Fe-Ni/Zn/βCD, suggesting its better capability to remove ions (cations and anions) from aqueous solutions compared to that of Fe-Ni/Zn.
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Affiliation(s)
- Ângelo M L Denadai
- Centro Federal de Educação Tecnológica (CEFET-MG), Campus VII, Timóteo, MG, Brazil 35183-006
- Universidade Federal de Juiz de Fora (UFJF), Governador Valadares, 35010-177, MG, Brazil
| | - Frederico B De Sousa
- Laboratório de Encapsulamento Molecular e Biomateriais (LEMB) – Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, 31270-901, MG, Brazil
| | - Joel J Passos
- Laboratório de Encapsulamento Molecular e Biomateriais (LEMB) – Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, 31270-901, MG, Brazil
| | - Fernando C Guatimosim
- Laboratório de Encapsulamento Molecular e Biomateriais (LEMB) – Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, 31270-901, MG, Brazil
| | - Kirla D Barbosa
- Laboratório de Encapsulamento Molecular e Biomateriais (LEMB) – Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, 31270-901, MG, Brazil
| | - Ana E Burgos
- Universidad Nacional de Colombia Bogotá – DC, Colombia
| | | | - Jeann C da Silva
- Centro Federal de Educação Tecnológica (CEFET-MG), Campus VII, Timóteo, MG, Brazil 35183-006
| | - Bernardo R A Neves
- Departamento de Física, ICEx, Universidade Federal de Minas Gerais (UFMG) Belo Horizonte – MG, 31270-901, Brazil
| | - Nelcy D S Mohallem
- Laboratório de Materiais Nanoestruturados, Departamento de Química, ICEx, Universidade Federal de Minas Gerais (UFMG) Belo Horizonte – MG, 31270-901, Brazil
| | - Rubén D Sinisterra
- Laboratório de Encapsulamento Molecular e Biomateriais (LEMB) – Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, 31270-901, MG, Brazil
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Novel β-cyclodextrin modified CdTe quantum dots as fluorescence nanosensor for acetylsalicylic acid and metabolites. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2012. [DOI: 10.1016/j.msec.2012.01.028] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Ghai R, Falconer RJ, Collins BM. Applications of isothermal titration calorimetry in pure and applied research--survey of the literature from 2010. J Mol Recognit 2012; 25:32-52. [PMID: 22213449 DOI: 10.1002/jmr.1167] [Citation(s) in RCA: 117] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Isothermal titration calorimetry (ITC) is a biophysical technique for measuring the formation and dissociation of molecular complexes and has become an invaluable tool in many branches of science from cell biology to food chemistry. By measuring the heat absorbed or released during bond formation, ITC provides accurate, rapid, and label-free measurement of the thermodynamics of molecular interactions. In this review, we survey the recent literature reporting the use of ITC and have highlighted a number of interesting studies that provide a flavour of the diverse systems to which ITC can be applied. These include measurements of protein-protein and protein-membrane interactions required for macromolecular assembly, analysis of enzyme kinetics, experimental validation of molecular dynamics simulations, and even in manufacturing applications such as food science. Some highlights include studies of the biological complex formed by Staphylococcus aureus enterotoxin C3 and the murine T-cell receptor, the mechanism of membrane association of the Parkinson's disease-associated protein α-synuclein, and the role of non-specific tannin-protein interactions in the quality of different beverages. Recent developments in automation are overcoming limitations on throughput imposed by previous manual procedures and promise to greatly extend usefulness of ITC in the future. We also attempt to impart some practical advice for getting the most out of ITC data for those researchers less familiar with the method.
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Affiliation(s)
- Rajesh Ghai
- Institute for Molecular Bioscience (IMB), University of Queensland, St. Lucia, Queensland, 4072, Australia
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