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Jansook P, Loftsson T. Self-assembled γ-cyclodextrin as nanocarriers for enhanced ocular drug bioavailability. Int J Pharm 2022; 618:121654. [DOI: 10.1016/j.ijpharm.2022.121654] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 02/21/2022] [Accepted: 03/07/2022] [Indexed: 12/21/2022]
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2
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Harvey DJ. ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES BY MATRIX-ASSISTED LASER DESORPTION/IONIZATION MASS SPECTROMETRY: AN UPDATE FOR 2015-2016. MASS SPECTROMETRY REVIEWS 2021; 40:408-565. [PMID: 33725404 DOI: 10.1002/mas.21651] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Accepted: 07/24/2020] [Indexed: 06/12/2023]
Abstract
This review is the ninth update of the original article published in 1999 on the application of matrix-assisted laser desorption/ionization (MALDI) mass spectrometry to the analysis of carbohydrates and glycoconjugates and brings coverage of the literature to the end of 2016. Also included are papers that describe methods appropriate to analysis by MALDI, such as sample preparation techniques, even though the ionization method is not MALDI. Topics covered in the first part of the review include general aspects such as theory of the MALDI process, matrices, derivatization, MALDI imaging, fragmentation and arrays. The second part of the review is devoted to applications to various structural types such as oligo- and poly-saccharides, glycoproteins, glycolipids, glycosides and biopharmaceuticals. Much of this material is presented in tabular form. The third part of the review covers medical and industrial applications of the technique, studies of enzyme reactions and applications to chemical synthesis. The reported work shows increasing use of combined new techniques such as ion mobility and the enormous impact that MALDI imaging is having. MALDI, although invented over 30 years ago is still an ideal technique for carbohydrate analysis and advancements in the technique and range of applications show no sign of deminishing. © 2020 Wiley Periodicals, Inc.
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Affiliation(s)
- David J Harvey
- Nuffield Department of Medicine, Target Discovery Institute, University of Oxford, Roosevelt Drive, Oxford, OX3 7FZ, United Kingdom
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3
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Falconer RJ, Schuur B, Mittermaier AK. Applications of isothermal titration calorimetry in pure and applied research from 2016 to 2020. J Mol Recognit 2021; 34:e2901. [PMID: 33975380 DOI: 10.1002/jmr.2901] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 04/02/2021] [Accepted: 04/26/2021] [Indexed: 02/06/2023]
Abstract
The last 5 years have seen a series of advances in the application of isothermal titration microcalorimetry (ITC) and interpretation of ITC data. ITC has played an invaluable role in understanding multiprotein complex formation including proteolysis-targeting chimeras (PROTACS), and mitochondrial autophagy receptor Nix interaction with LC3 and GABARAP. It has also helped elucidate complex allosteric communication in protein complexes like trp RNA-binding attenuation protein (TRAP) complex. Advances in kinetics analysis have enabled the calculation of kinetic rate constants from pre-existing ITC data sets. Diverse strategies have also been developed to study enzyme kinetics and enzyme-inhibitor interactions. ITC has also been applied to study small molecule solvent and solute interactions involved in extraction, separation, and purification applications including liquid-liquid separation and extractive distillation. Diverse applications of ITC have been developed from the analysis of protein instability at different temperatures, determination of enzyme kinetics in suspensions of living cells to the adsorption of uremic toxins from aqueous streams.
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Affiliation(s)
- Robert J Falconer
- School of Chemical Engineering & Advanced Materials, University of Adelaide, Adelaide, South Australia, Australia
| | - Boelo Schuur
- Faculty of Science and Technology, University of Twente, Enschede, Netherlands
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González-Louzao R, Lucas-Abellán C, Pérez-Sánchez H, Pedro Cerón-Carrasco J, Antonio Gabaldón J, López-Miranda S, Josefa Yáñez-Gascón M, Asín-Llorca M, Núñez-Delicado E. Encapsulation of finasteride with native and modified γ-cyclodextrins. Extensive characterization of the complexes. Int J Pharm 2020; 587:119619. [PMID: 32693287 DOI: 10.1016/j.ijpharm.2020.119619] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 06/30/2020] [Accepted: 07/01/2020] [Indexed: 11/17/2022]
Abstract
The aim of this work was to study the complexation process of FIN with native and modified CDs, to develop an aqueous solution for the topical treatment of male androgenic alopecia. The effect of pH and temperature in the complexation process were studied by solubility studies. The complexes FIN-CDs were characterized by 1HNMR and 2-D NMR (ROESY) spectroscopy. Molecular modeling studies and NMR data were used to build three-dimensional models of the complexes. FTIR, DSC and SEM techniques were also applied to strengthen physicochemical characterization, geometry as well as structural aspects evidencing the effective inclusion of FIN into the CDs' hydrophobic cavity. The most effective CDs in the FIN complexation were γ-CDs, and their modified HP-γ- and methyl-γ-CDs by forming 1:1 complexes. The Kc value obtained for γ-CDs was 9687 ± 51 M-1, whereas the Kc values obtained for HP-γ- and methyl-γ-CDs were lower, indicating that the presence of HP or methyl groups hinder the entry of FIN in the hydrophobic cavity of γ-CDs. In conclusion, FIN aqueous solubility could be increased by complexation with CDs and the aqueous solutions obtained can be used to improve FIN therapeutic possibilities in a pleasant preparation for the patient that guarantees the adherence to the treatment.
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Affiliation(s)
- Rebeca González-Louzao
- Universidad Católica San Antonio de Murcia (UCAM), Campus de los Jerónimos, N° 135, Guadalupe, 30107 Murcia, Spain
| | - Carmen Lucas-Abellán
- Dpto. Tecnología Alimentaria y Nutrición, Universidad Católica San Antonio de Murcia (UCAM), Campus de los Jerónimos, N° 135, Guadalupe, 30107 Murcia, Spain
| | - Horacio Pérez-Sánchez
- Bioinformatics and High Performance Computing Research Group (BIO-HPC), Dpto. Ciencias Politécnicas, Universidad Católica San Antonio de Murcia (UCAM), Campus de los Jerónimos, N° 135, Guadalupe, 30107 Murcia, Spain
| | - José Pedro Cerón-Carrasco
- Bioinformatics and High Performance Computing Research Group (BIO-HPC), Dpto. Ciencias Politécnicas, Universidad Católica San Antonio de Murcia (UCAM), Campus de los Jerónimos, N° 135, Guadalupe, 30107 Murcia, Spain
| | - José Antonio Gabaldón
- Dpto. Tecnología Alimentaria y Nutrición, Universidad Católica San Antonio de Murcia (UCAM), Campus de los Jerónimos, N° 135, Guadalupe, 30107 Murcia, Spain
| | - Santiago López-Miranda
- Dpto. Tecnología Alimentaria y Nutrición, Universidad Católica San Antonio de Murcia (UCAM), Campus de los Jerónimos, N° 135, Guadalupe, 30107 Murcia, Spain
| | - María Josefa Yáñez-Gascón
- Dpto. Tecnología Alimentaria y Nutrición, Universidad Católica San Antonio de Murcia (UCAM), Campus de los Jerónimos, N° 135, Guadalupe, 30107 Murcia, Spain
| | | | - Estrella Núñez-Delicado
- Dpto. Tecnología Alimentaria y Nutrición, Universidad Católica San Antonio de Murcia (UCAM), Campus de los Jerónimos, N° 135, Guadalupe, 30107 Murcia, Spain.
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5
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Schönbeck C. Complexation Kinetics of Cyclodextrins with Bile Salt Anions: Energy Barriers for the Threading of Ionic Groups. J Phys Chem B 2019; 123:9831-9838. [PMID: 31664833 DOI: 10.1021/acs.jpcb.9b09415] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Binding constants for thousands of cyclodextrin complexes have been reported in the literature, but much less is known about the kinetics of these host-guest complexes. In the present study, inclusion complexes of bile salts with β-cyclodextrin, γ-cyclodextrin, and a methylated β-cyclodextrin were studied by nuclear magnetic resonance (NMR) lineshape analysis to explore the structural factors that govern the complexation kinetics. For complexes with β-cyclodextrin, the association rate constants ranged from 2 × 106 to 2 × 107 M-1 s-1 while the dissociation rate constants ranged from 12 to 6000 s-1 at 25 °C. The kinetics were thus significantly slower than for any other β-cyclodextrin complex reported in the literature, due to the large energy barrier for threading the ionic sidechains of the bile salt anions. Bile salts with taurine and glycine sidechains had identical binding affinities, but the kinetics differed by a factor of 10. Introduction of a single hydroxyl group at the binding site of the bile salts reduced the lifetimes and binding constants of the complexes by more than 50 times. The strong temperature dependence of the rate constants revealed that the large activation energies were mainly enthalpic with a small contribution from entropy. The larger γ-cyclodextrin was threaded by the nonionic end of the bile salts, and the kinetics were too fast to be accurately determined. The study demonstrates that ionic groups on guest molecules constitute significant energy barriers for the threading and dethreading of β-cyclodextrin hosts.
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Affiliation(s)
- Christian Schönbeck
- Department of Science and Environment , Roskilde University , Universitetsvej 1 , DK-4000 Roskilde , Denmark
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Schönbeck C, Holm R. Exploring the Origins of Enthalpy–Entropy Compensation by Calorimetric Studies of Cyclodextrin Complexes. J Phys Chem B 2019; 123:6686-6693. [DOI: 10.1021/acs.jpcb.9b03393] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Christian Schönbeck
- Department of Science and Environment, Roskilde University, Universitetsvej 1, DK-4000 Roskilde, Denmark
| | - René Holm
- Department of Science and Environment, Roskilde University, Universitetsvej 1, DK-4000 Roskilde, Denmark
- Drug Product Development, Janssen Research and Development, Johnson & Johnson, Turnhoutseweg 30, 2340 Beerse, Belgium
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7
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Gatiatulin AK, Osel'skaya VY, Ziganshin MA, Gorbatchuk VV. Smart control of guest inclusion by α-cyclodextrin using its hydration history. RSC Adv 2019; 9:37778-37787. [PMID: 35541818 PMCID: PMC9075746 DOI: 10.1039/c9ra08710a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Accepted: 11/11/2019] [Indexed: 12/13/2022] Open
Abstract
Hydration history was found to control the inclusion capacity of α-cyclodextrin (aCD) for volatile organic guests, so that its level may be switched from zero to the stoichiometric value and back by the variation of aCD hydration/dehydration order and direction. Such variation of the inclusion capacity is caused by the balance of two water roles: the activation of guest inclusion and guest/water competition. These observed concurrent roles and the cooperativity of guest inclusion and hydration make possible the smart tuning of the guest inclusion by the subtle change of preparation procedure. Depending on the hydration history, aCD was shown to form hydrates with the same water contents but different packing types and different kinetics of dehydration, which correlates with their different inclusion capacities for organic guests. This correlation reveals how the “high-energy” and “low-energy” water works in the guest inclusion by aCD, which may be relevant for other cyclodextrins and hydrophilic receptors of biomimetic and biological natures. The results can help to rationalize the technologies of producing various inclusion compounds of cyclodextrins. The hydration level and hydration history of alpha-cyclodextrin significantly affects its structure and inclusion capacity for organic guests.![]()
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Affiliation(s)
- Askar K. Gatiatulin
- A. M. Butlerov Institute of Chemistry
- Kazan Federal University
- Kazan 420008
- Russia
| | | | - Marat A. Ziganshin
- A. M. Butlerov Institute of Chemistry
- Kazan Federal University
- Kazan 420008
- Russia
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Heřmánková E, Žák A, Poláková L, Hobzová R, Hromádka R, Širc J. Polymeric bile acid sequestrants: Review of design, in vitro binding activities, and hypocholesterolemic effects. Eur J Med Chem 2017; 144:300-317. [PMID: 29275230 DOI: 10.1016/j.ejmech.2017.12.015] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Revised: 12/04/2017] [Accepted: 12/04/2017] [Indexed: 01/06/2023]
Abstract
Polymeric bile acid sequestrants (BAS) have recently attracted much attention as lipid-lowering agents. These non-absorbable materials specifically bind bile acids (BAs) in the intestine, preventing bile acid (BA) reabsorption into the blood through enterohepatic circulation. Therefore, it is important to understand the structure-property relationships between the polymer sequestrant and its ability to bind specific BAs molecules. In this review, we describe pleiotropic effects of bile acids, and we focus on BAS with various molecular architectures that result in different mechanisms of BA sequestration. Here, we present 1) amphiphilic polymers based on poly(meth)acrylates, poly(meth)acrylamides, polyalkylamines and polyallylamines containing quaternary ammonium groups, 2) cyclodextrins, and 3) BAS prepared via molecular imprinting methods. The synthetic approaches leading to individual BAS preparation, as well as results of their in vitro BA binding activities and in vivo lipid-lowering activities, are discussed.
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Affiliation(s)
- Eva Heřmánková
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovsky sq. 2, CZ-162 06 Prague, Czech Republic.
| | - Aleš Žák
- 4th Department of Medicine, First Faculty of Medicine, Charles University, U Nemocnice 2, CZ-128 08 Prague, Czech Republic.
| | - Lenka Poláková
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovsky sq. 2, CZ-162 06 Prague, Czech Republic.
| | - Radka Hobzová
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovsky sq. 2, CZ-162 06 Prague, Czech Republic.
| | - Róbert Hromádka
- Research and Development Center, C2P s.r.o. Chlumec nad Cidlinou, Czech Republic.
| | - Jakub Širc
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovsky sq. 2, CZ-162 06 Prague, Czech Republic.
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