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Penkov NV. Peculiarities of the Dynamical Hydration Shell of Native Conformation Protein Using a Bovine Serum Albumin Example. APPLIED SPECTROSCOPY 2024:37028241261097. [PMID: 38881287 DOI: 10.1177/00037028241261097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2024]
Abstract
This paper describes an approach based on the method of terahertz time-domain spectroscopy, which allows the analysis of dynamical hydration shells of proteins with a thickness of 1-2 nm. Using the example of bovine serum albumin in three conformations, it is shown that the hydration shells of the protein are characterized by increased binding of water molecules in the primary hydration layers, and in more distant areas of hydration, on the contrary, the water structure is somewhat destroyed. The fraction of free or weakly bound molecules, usually observed in the structure of liquid water in hydration shells, become more numerous but its average binding is greater than in undisturbed water. The energy distribution of hydrogen bonds in hydration shells is narrowed compared to undisturbed water. All these manifestations of hydration are most pronounced for the native conformation of the protein. Also, the hydration shells of the native protein are characterized by a smaller number of hydrogen bonds and a tendency to decrease their average energy compared to non-native conformations. The fact of a pronounced peculiarity of the hydration shells of the protein in the native conformation has been noted for different proteins before. However, the methodological approach used in this work for the first time allowed this peculiarity to be described by specific parameters of the intermolecular structure and dynamics of water.
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Affiliation(s)
- Nikita V Penkov
- Institute of Cell Biophysics, Federal Research Center, Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences, Pushchino, Russia
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2
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Penkov NV. Terahertz spectroscopy as a method for investigation of hydration shells of biomolecules. Biophys Rev 2023; 15:833-849. [PMID: 37974994 PMCID: PMC10643733 DOI: 10.1007/s12551-023-01131-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Accepted: 08/30/2023] [Indexed: 11/19/2023] Open
Abstract
The hydration of biomolecules is one of the fundamental processes underlying the construction of living matter. The formation of the native conformation of most biomolecules is possible only in an aqueous environment. At the same time, not only water affects the structure of biomolecules, but also biomolecules affect the structure of water, forming hydration shells. However, the study of the structure of biomolecules is given much more attention than their hydration shells. A real breakthrough in the study of hydration occurred with the development of the THz spectroscopy method, which showed that the hydration shell of biomolecules is not limited to 1-2 layers of strongly bound water, but also includes more distant areas of hydration with altered molecular dynamics. This review examines the fundamental features of the THz frequency range as a source of information about the structural and dynamic characteristics of water that change during hydration. The applied approaches to the study of hydration shells of biomolecules based on THz spectroscopy are described. The data on the hydration of biomolecules of all main types obtained from the beginning of the application of THz spectroscopy to the present are summarized. The emphasis is placed on the possible participation of extended hydration shells in the realization of the biological functions of biomolecules and at the same time on the insufficient knowledge of their structural and dynamic characteristics.
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Affiliation(s)
- Nikita V. Penkov
- Federal Research Center “Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences”, Institute of Cell Biophysics RAS, 142290 Pushchino, Russia
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3
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Yeo H, Linforth R, MacNaughtan W, Williams H, Hewson L, Fisk ID. Effect of sweeteners and carbonation on aroma partitioning and release in beverage systems. Food Res Int 2023; 164:112373. [PMID: 36737960 DOI: 10.1016/j.foodres.2022.112373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 12/12/2022] [Accepted: 12/24/2022] [Indexed: 12/28/2022]
Abstract
The effect of monosaccharides (glucose, fructose and galactose) and disaccharides (sucrose and lactose) at 10, 20 and 30 % w/v on the in-vitro aroma partitioning of C4 - C10 aldehydes and ethyl esters, as well as limonene (concentration of aroma compounds at 1 μg mL-1), was studied using atmospheric pressure chemical ionisation-mass spectrometry. An increase in sugar concentration from 0 to 30 % w/v resulted in a significant increase in partitioning under static headspace conditions for the majority of the compounds (p < 0.05), an effect generally not observed when 10 % w/v sucrose was substituted with low-calorie sweeteners (p > 0.05). The complexity of the system was increased to model a soft drink design - comprising water, sucrose (10, 20 and 30 % w/v), acid (0.15 % w/v), carbonation (∼7.2 g/L CO2) and aroma compounds representative of an apple style flavouring, namely ethyl butanoate and hexanal (10 μg mL-1 each). Although the addition of sucrose had no significant in-vivo effect, carbonation significantly decreased breath-by-breath (in-vivo) aroma delivery (p < 0.05). To understand the physical mechanisms behind aroma release from the beverage matrix, the effect of sucrose on the kinetics of the matrix components was explored. An increase in sucrose concentration from 0 to 30 % w/v resulted in a significant decrease in water activity (p < 0.05), which accounted for the significantly slower rate of self-diffusion of aroma compounds (p < 0.05), measured using diffusion-ordered spectroscopy-nuclear magnetic resonance spectroscopy. No significant effect of sucrose on carbon dioxide volume flux was found (p > 0.05).
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Affiliation(s)
- HuiQi Yeo
- Division of Food Nutrition and Dietetics, University of Nottingham, Sutton Bonington Campus, Loughborough LE12 5RD, UK
| | - Robert Linforth
- Division of Food Nutrition and Dietetics, University of Nottingham, Sutton Bonington Campus, Loughborough LE12 5RD, UK
| | - William MacNaughtan
- Division of Food Nutrition and Dietetics, University of Nottingham, Sutton Bonington Campus, Loughborough LE12 5RD, UK
| | - Huw Williams
- Centre for Biomedical Sciences, University of Nottingham, UK
| | - Louise Hewson
- International Flavour Research Centre, Division of Food, Nutrition and Dietetics, University of Nottingham, Sutton Bonington Campus, Loughborough LE12 5RD, United Kingdom
| | - Ian D Fisk
- International Flavour Research Centre, Division of Food, Nutrition and Dietetics, University of Nottingham, Sutton Bonington Campus, Loughborough LE12 5RD, United Kingdom; International Flavour Research Centre (Adelaide), School of Agriculture, Food and Wine and Waite Research Institute, The University of Adelaide, PMB 1, Glen Osmond, South Australia 5064, Australia.
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4
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Takhaveev V, Özsezen S, Smith EN, Zylstra A, Chaillet ML, Chen H, Papagiannakis A, Milias-Argeitis A, Heinemann M. Temporal segregation of biosynthetic processes is responsible for metabolic oscillations during the budding yeast cell cycle. Nat Metab 2023; 5:294-313. [PMID: 36849832 PMCID: PMC9970877 DOI: 10.1038/s42255-023-00741-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Accepted: 01/10/2023] [Indexed: 03/01/2023]
Abstract
Many cell biological and biochemical mechanisms controlling the fundamental process of eukaryotic cell division have been identified; however, the temporal dynamics of biosynthetic processes during the cell division cycle are still elusive. Here, we show that key biosynthetic processes are temporally segregated along the cell cycle. Using budding yeast as a model and single-cell methods to dynamically measure metabolic activity, we observe two peaks in protein synthesis, in the G1 and S/G2/M phase, whereas lipid and polysaccharide synthesis peaks only once, during the S/G2/M phase. Integrating the inferred biosynthetic rates into a thermodynamic-stoichiometric metabolic model, we find that this temporal segregation in biosynthetic processes causes flux changes in primary metabolism, with an acceleration of glucose-uptake flux in G1 and phase-shifted oscillations of oxygen and carbon dioxide exchanges. Through experimental validation of the model predictions, we demonstrate that primary metabolism oscillates with cell-cycle periodicity to satisfy the changing demands of biosynthetic processes exhibiting unexpected dynamics during the cell cycle.
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Affiliation(s)
- Vakil Takhaveev
- Molecular Systems Biology, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Groningen, The Netherlands
- Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland
| | - Serdar Özsezen
- Molecular Systems Biology, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Groningen, The Netherlands
- Department of Microbiology and Systems Biology, The Netherlands Organization for Applied Scientific Research (TNO), Leiden, The Netherlands
| | - Edward N Smith
- Molecular Systems Biology, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Groningen, The Netherlands
| | - Andre Zylstra
- Molecular Systems Biology, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Groningen, The Netherlands
| | - Marten L Chaillet
- Molecular Systems Biology, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Groningen, The Netherlands
- Structural Biochemistry, Bijvoet Center for Biomolecular Research, Utrecht University, Utrecht, The Netherlands
| | - Haoqi Chen
- Molecular Systems Biology, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Groningen, The Netherlands
| | - Alexandros Papagiannakis
- Molecular Systems Biology, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Groningen, The Netherlands
- Department of Biology and Sarafan Chemistry, Engineering, and Medicine for Human Health Institute, Stanford University, Stanford, CA, USA
| | - Andreas Milias-Argeitis
- Molecular Systems Biology, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Groningen, The Netherlands
| | - Matthias Heinemann
- Molecular Systems Biology, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Groningen, The Netherlands.
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Morita M, Matsumura F, Shikata T, Ogawa Y, Kondo N, Shiraga K. Hydrogen-Bond Configurations of Hydration Water around Glycerol Investigated by HOH Bending and OH Stretching Analysis. J Phys Chem B 2022; 126:9871-9880. [PMID: 36350734 DOI: 10.1021/acs.jpcb.2c05445] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Toward a comprehensive understanding of the mechanism of glycerol as a moisturizer, studies on the hydrogen-bond (HB) structure of hydration water, which is known to be disordered by glycerol, are insufficient. To this aim, we evaluated the HB configurations based on the HOH bending and OH stretching spectra of the hydration water from those of glycerol/water mixtures by subtracting the contributions of bulk water and glycerol using dielectric relaxation spectroscopy. Analysis of the HOH bending band showed that hydration water-donating HBs lose the intermolecular bending coupling with increasing glycerol by replacing the water-water HBs with water-glycerol HBs. The OH stretching band provided more detailed insight into the HB configuration, indicating that the double-donor double-acceptor and double-donor single-acceptor configurations in bulk water change to a predominantly double-donor single-acceptor configuration in hydration water around glycerol. The formation of more donor HBs than acceptor HBs may be due to the steric constrains by glycerol and/or differences in the partial charge on the oxygen atom between water and glycerol.
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Affiliation(s)
- Miho Morita
- Graduate School of Agriculture, Kyoto University, Kyoto606-8502, Japan
| | - Fumiki Matsumura
- Graduate School of Agriculture, Kyoto University, Kyoto606-8502, Japan
| | - Toshiyuki Shikata
- Graduate School of Agriculture, Tokyo University of Agriculture and Technology, Tokyo183-8509, Japan
| | - Yuichi Ogawa
- Graduate School of Agriculture, Kyoto University, Kyoto606-8502, Japan
| | - Naoshi Kondo
- Graduate School of Agriculture, Kyoto University, Kyoto606-8502, Japan
| | - Keiichiro Shiraga
- Graduate School of Agriculture, Kyoto University, Kyoto606-8502, Japan.,PRESTO, Japan Science and Technology Agency, Kawaguchi332-0012, Japan
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6
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Enthalpy-related parameters of interaction of sucrose, lactose and their monosaccharide constituents with the mebicar (N-tetramethylglycoluril) drug in an aqueous medium at 298.15 K. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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7
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Liu W, Yin X, Chen Y, Li M, Han D, Liu W. Quantitative determination of acacia honey adulteration by terahertz-frequency dielectric properties as an alternative technique. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 274:121106. [PMID: 35279002 DOI: 10.1016/j.saa.2022.121106] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Revised: 02/24/2022] [Accepted: 02/28/2022] [Indexed: 06/14/2023]
Abstract
The dielectric characteristics in the terahertz region contribute to a revealing insight into the material components and provide intermolecular information. The dielectric properties of adulterated honey, described as the real and imaginary parts of the complex dielectric constant (Re[ε] and Im[ε]), were obtained from 0.3 to 1.5 THz. The relationship between invert syrup proportions and complex dielectric constants at different frequencies implied the possibility of using the dielectric property as an indicator of honey authenticity. The selected effective dielectric variables of Re[ε] and Im[ε] and their combination were chosen by stability competitive adaptive reweighted sampling (SCARS) algorithm and then used to establish PLS models. The accuracy and uncertainty result revealed SCARS-PLS model based on the combination of Re[ε] and Im[ε] is the best model relatively. These findings indicated the potential utility of this rapid, non-destructive, and on-site method for authenticity verification.
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Affiliation(s)
- Wen Liu
- School of Chemical Engineering, Xiangtan University, Xiangtan 411105, PR China.
| | - Xurong Yin
- School of Chemical Engineering, Xiangtan University, Xiangtan 411105, PR China
| | - Yanjing Chen
- School of Chemical Engineering, Xiangtan University, Xiangtan 411105, PR China
| | - Ming Li
- Tianjin Key Laboratory of Food Biotechnology, College of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin 300134, PR China
| | - Donghai Han
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, PR China.
| | - Wenjie Liu
- School of Chemical Engineering, Xiangtan University, Xiangtan 411105, PR China
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9
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Relationships between Molecular Structure of Carbohydrates and Their Dynamic Hydration Shells Revealed by Terahertz Time-Domain Spectroscopy. Int J Mol Sci 2021; 22:ijms222111969. [PMID: 34769399 PMCID: PMC8584907 DOI: 10.3390/ijms222111969] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 10/26/2021] [Accepted: 11/03/2021] [Indexed: 11/17/2022] Open
Abstract
Despite more than a century of research on the hydration of biomolecules, the hydration of carbohydrates is insufficiently studied. An approach to studying dynamic hydration shells of carbohydrates in aqueous solutions based on terahertz time-domain spectroscopy assay is developed in the current work. Monosaccharides (glucose, galactose, galacturonic acid) and polysaccharides (dextran, amylopectin, polygalacturonic acid) solutions were studied. The contribution of the dissolved carbohydrates was subtracted from the measured dielectric permittivities of aqueous solutions based on the corresponding effective medium models. The obtained dielectric permittivities of the water phase were used to calculate the parameters describing intermolecular relaxation and oscillatory processes in water. It is established that all of the analyzed carbohydrates lead to the increase of the binding degree of water. Hydration shells of monosaccharides are characterized by elevated numbers of hydrogen bonds and their mean energies compared to undisturbed water, as well as by elevated numbers and the lifetime of free water molecules. The axial orientation of the OH(4) group of sugar facilitates a wider distribution of hydrogen bond energies in hydration shells compared to equatorial orientation. The presence of the carboxylic group affects water structure significantly. The hydration of polysaccharides is less apparent than that of monosaccharides, and it depends on the type of glycosidic bonds.
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10
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Li D, Zhu Z, Sun DW. Quantification of hydrogen bonding strength of water in saccharide aqueous solutions by confocal Raman microscopy. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117498] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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11
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Penkova NA, Sharapov MG, Penkov NV. Hydration Shells of DNA from the Point of View of Terahertz Time-Domain Spectroscopy. Int J Mol Sci 2021; 22:ijms222011089. [PMID: 34681747 PMCID: PMC8538832 DOI: 10.3390/ijms222011089] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 10/09/2021] [Accepted: 10/10/2021] [Indexed: 11/16/2022] Open
Abstract
Hydration plays a fundamental role in DNA structure and functioning. However, the hydration shell has been studied only up to the scale of 10-20 water molecules per nucleotide. In the current work, hydration shells of DNA were studied in a solution by terahertz time-domain spectroscopy. The THz spectra of three DNA solutions (in water, 40 mm MgCl2 and 150 mM KCl) were transformed using an effective medium model to obtain dielectric permittivities of the water phase of solutions. Then, the parameters of two relaxation bands related to bound and free water molecules, as well as to intermolecular oscillations, were calculated. The hydration shells of DNA differ from undisturbed water by the presence of strongly bound water molecules, a higher number of free molecules and an increased number of hydrogen bonds. The presence of 40 mM MgCl2 in the solution almost does not alter the hydration shell parameters. At the same time, 150 mM KCl significantly attenuates all the found effects of hydration. Different effects of salts on hydration cannot be explained by the difference in ionic strength of solutions, they should be attributed to the specific action of Mg2+ and K+ ions. The obtained results significantly expand the existing knowledge about DNA hydration and demonstrate a high potential for using the THz time-domain spectroscopy method.
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Affiliation(s)
- Nadezda A. Penkova
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, 142290 Pushchino, Russia;
| | - Mars G. Sharapov
- Institute of Cell Biophysics RAS, Federal Research Center “Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences”, 142290 Pushchino, Russia;
| | - Nikita V. Penkov
- Institute of Cell Biophysics RAS, Federal Research Center “Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences”, 142290 Pushchino, Russia;
- Correspondence:
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12
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Zhang L, Zhang M, Mujumdar AS. Terahertz Spectroscopy: A Powerful Technique for Food Drying Research. FOOD REVIEWS INTERNATIONAL 2021. [DOI: 10.1080/87559129.2021.1936004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Lihui Zhang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, China
- International Joint Laboratory on Food Safety, Jiangnan University, Wuxi, China
| | - Min Zhang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, China
- Jiangsu Province Key Laboratory of Advanced Food Manufacturing Equipment and Technology, Jiangnan University, Wuxi, China
| | - Arun S. Mujumdar
- Department of Bioresource Engineering, Macdonald Campus, McGill University, Montreal, Quebec, Canada
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13
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Lykina AA, Nazarov MM, Konnikova MR, Mustafin IA, Vaks VL, Anfertev VA, Domracheva EG, Chernyaeva MB, Kistenev YV, Vrazhnov DA, Prischepa VV, Kononova YA, Korolev DV, Cherkasova OP, Shkurinov AP, Babenko AY, Smolyanskaya OA. Terahertz spectroscopy of diabetic and non-diabetic human blood plasma pellets. JOURNAL OF BIOMEDICAL OPTICS 2021; 26:JBO-200355SSR. [PMID: 33580640 PMCID: PMC7880624 DOI: 10.1117/1.jbo.26.4.043006] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2020] [Accepted: 01/19/2021] [Indexed: 06/12/2023]
Abstract
SIGNIFICANCE The creation of fundamentally new approaches to storing various biomaterial and estimation parameters, without irreversible loss of any biomaterial, is a pressing challenge in clinical practice. We present a technology for studying samples of diabetic and non-diabetic human blood plasma in the terahertz (THz) frequency range. AIM The main idea of our study is to propose a method for diagnosis and storing the samples of diabetic and non-diabetic human blood plasma and to study these samples in the THz frequency range. APPROACH Venous blood from patients with type 2 diabetes mellitus and conditionally healthy participants was collected. To limit the impact of water in the THz spectra, lyophilization of liquid samples and their pressing into a pellet were performed. These pellets were analyzed using THz time-domain spectroscopy. The differentiation between the THz spectral data was conducted using multivariate statistics to classify non-diabetic and diabetic groups' spectra. RESULTS We present the density-normalized absorption and refractive index for diabetic and non-diabetic pellets in the range 0.2 to 1.4 THz. Over the entire THz frequency range, the normalized index of refraction of diabetes pellets exceeds this indicator of non-diabetic pellet on average by 9% to 12%. The non-diabetic and diabetic groups of the THz spectra are spatially separated in the principal component space. CONCLUSION We illustrate the potential ability in clinical medicine to construct a predictive rule by supervised learning algorithms after collecting enough experimental data.
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Affiliation(s)
- Anastasiya A. Lykina
- Institute of Photonics and Optical Information Technologies, ITMO University, Saint-Petersburg, Russia
| | | | - Maria R. Konnikova
- Institute on Laser and Information Technologies, Russian Academy of Sciences — Branch of Federal Scientific Research Center “Crystallography and Photonics,” Russian Academy of Sciences, Moscow, Russia
- Department of Physics, Lomonosov Moscow State University, Moscow, Russia
| | | | - Vladimir L. Vaks
- Institute for Physics of Microstructures, Russian Academy of Sciences, Nizhny Novgorod, Russia
| | - Vladimir A. Anfertev
- Institute for Physics of Microstructures, Russian Academy of Sciences, Nizhny Novgorod, Russia
| | - Elena G. Domracheva
- Institute for Physics of Microstructures, Russian Academy of Sciences, Nizhny Novgorod, Russia
| | - Mariya B. Chernyaeva
- Institute for Physics of Microstructures, Russian Academy of Sciences, Nizhny Novgorod, Russia
| | | | - Denis A. Vrazhnov
- Institute of Strength Physics and Materials Science, Siberian Branch of the Russian Academy of Sciences, Tomsk, Russia
| | | | | | | | - Olga P. Cherkasova
- Institute on Laser and Information Technologies, Russian Academy of Sciences — Branch of Federal Scientific Research Center “Crystallography and Photonics,” Russian Academy of Sciences, Moscow, Russia
- Institute of Laser Physics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
| | - Alexander P. Shkurinov
- Institute on Laser and Information Technologies, Russian Academy of Sciences — Branch of Federal Scientific Research Center “Crystallography and Photonics,” Russian Academy of Sciences, Moscow, Russia
- Department of Physics, Lomonosov Moscow State University, Moscow, Russia
| | - Alina Y. Babenko
- Almazov National Medical Research Centre, Saint-Petersburg, Russia
| | - Olga A. Smolyanskaya
- Institute of Photonics and Optical Information Technologies, ITMO University, Saint-Petersburg, Russia
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14
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Arai K, Shikata T. Hydration/Dehydration Behavior of Hydroxyethyl Cellulose Ether in Aqueous Solution. Molecules 2020; 25:molecules25204726. [PMID: 33076298 PMCID: PMC7587591 DOI: 10.3390/molecules25204726] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 10/05/2020] [Accepted: 10/12/2020] [Indexed: 12/03/2022] Open
Abstract
Hydroxyethyl cellulose (HeC) maintains high water solubility over a wide temperature range even in a high temperature region where other nonionic chemically modified cellulose ethers, such as methyl cellulose (MC) and hydroxypropylmethyl cellulose (HpMC), demonstrate cloud points. In order to clarify the reason for the high solubility of HeC, the temperature dependence of the hydration number per glucopyranose unit, nH, for the HeC samples was examined by using extremely high frequency dielectric spectrum measuring techniques up to 50 GHz over a temperature range from 10 to 70 °C. HeC samples with a molar substitution number (MS) per glucopyranose unit by hydroxyethyl groups ranging from 1.3 to 3.6 were examined in this study. All HeC samples dissolve into water over the examined temperature range and did not show their cloud points. The value of nH for the HeC sample possessing the MS of 1.3 was 14 at 20 °C and decreased gently with increasing temperature and declined to 10 at 70 °C. The nH values of the HeC samples are substantially larger than the minimum critical nH value of ca. 5 necessary to be dissolved into water for cellulose ethers such as MC and HpMC, even in a high temperature range. Then, the HeC molecules possess water solubility over the wide temperature range. The temperature dependence of nH for the HeC samples and triethyleneglycol, which is a model compound for substitution groups of HeC, is gentle and they are similar to each other. This observation strongly suggests that the hydration/dehydration behavior of the HeC samples was essentially controlled by that of their substitution groups.
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Affiliation(s)
- Kengo Arai
- Cellulose Research Unit, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan;
| | - Toshiyuki Shikata
- Cellulose Research Unit, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan;
- Division of Natural Resources and Eco-materials, Graduate School of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
- Correspondence:
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15
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Brender JR, Kishimoto S, Eaton GR, Eaton SS, Saida Y, Mitchell J, Krishna MC. Trehalose as an alternative to glycerol as a glassing agent for in vivo DNP MRI. Magn Reson Med 2020; 85:42-48. [PMID: 32697878 DOI: 10.1002/mrm.28405] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Revised: 05/12/2020] [Accepted: 06/09/2020] [Indexed: 12/18/2022]
Abstract
PURPOSE In dynamic nuclear polarization (DNP), the solution needs to form a glass to attain significant levels of polarization in reasonable time periods. Molecules that do not form glasses by themselves are often mixed with glass forming excipients. Although glassing agents are often essential in DNP studies, they have the potential to perturb the metabolic measurements that are being studied. Glycerol, the glassing agent of choice for in vivo DNP studies, is effective in reducing ice crystal formation during freezing, but is rapidly metabolized, potentially altering the redox and adenosine triphosphate balance of the system. METHODS DNP buildup curves of 13 C urea and alanine with OX063 in the presence of trehalose, glycerol, and other polyol excipients were measured as a function of concentration. T1 and Tm relaxation times for OX063 in the presence of trehalose were measured by EPR. RESULTS Approximately 15-20 wt% trehalose gives a glass that polarizes samples more rapidly than the commonly used 60%-wt formulation of glycerol and yields similar polarization levels within clinically relevant timeframes. CONCLUSIONS Trehalose may be an attractive biologically inert alternative to glycerol for situations where there may be concerns about glycerol's glucogenic potential and possible alteration of the adenosine triphosphate/adenosine diphosphate and redox balance.
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Affiliation(s)
- Jeffrey R Brender
- Radiation Biology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - Shun Kishimoto
- Radiation Biology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - Gareth R Eaton
- Department of Chemistry & Biochemistry, University of Denver, Denver, CO, USA
| | - Sandra S Eaton
- Department of Chemistry & Biochemistry, University of Denver, Denver, CO, USA
| | - Yu Saida
- Radiation Biology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - James Mitchell
- Radiation Biology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - Murali C Krishna
- Radiation Biology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
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16
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Attenuated Total Reflection for Terahertz Modulation, Sensing, Spectroscopy and Imaging Applications: A Review. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10144688] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Terahertz (THz) technique has become one of the most promising analytical methods and has been applied in many fields. Attenuated total reflection (ATR) technique applied in THz spectroscopy and imaging has been proven to be superior in functionalities such as modulation, sensing, analyzing, and imaging. Here, we first provide a concise introduction to the principle of ATR, discuss the factors that impact the ATR system, and demonstrate recent advances on THz wave modulation and THz surface plasmon sensing based on the THz-ATR system. Then, applications on THz-ATR spectroscopy and imaging are reviewed. Towards the later part, the advantages and limitations of THz-ATR are summarized, and prospects of modulation, surface plasmon sensing, spectroscopy and imaging are discussed.
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17
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Huang L, Li C, Li B, Liu M, Lian M, Yang S. Studies on qualitative and quantitative detection of trehalose purity by terahertz spectroscopy. Food Sci Nutr 2020; 8:1828-1836. [PMID: 32328248 PMCID: PMC7174203 DOI: 10.1002/fsn3.1458] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Revised: 07/10/2019] [Accepted: 07/24/2019] [Indexed: 11/09/2022] Open
Abstract
Terahertz spectroscopy was used to qualitatively and quantitatively analyze four samples (three brands) of trehalose produced in China and other countries. The results show that the main characteristic peak was greatly affected by concentration, and the optimal detection concentration of trehalose was determined to be 25%-55% by transmission scanning. There were six significant characteristic absorption peaks in the trehalose spectrum, meaning that terahertz spectroscopy can be used for qualitative analysis, analogous to infrared spectroscopy. Moreover, the terahertz spectrum can effectively distinguish the three isomers of trehalose, whereas infrared spectroscopy cannot. Thus, it was found that the current commercially available trehalose is the α,α-isomer. Quantitative analysis of the three brands of trehalose using terahertz spectroscopy matched the purity trends found by high-performance liquid chromatography analysis, with the order of purity from highest to lowest being TREHA, Pioneer, and Huiyang. The actual quantitative values did differ between the two detection methods, but the variation in the values from the same sample obtained by the two detection methods was less than 5%, confirming that terahertz spectroscopy is very suitable for the rapid and relative quantitative detection of trehalose.
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Affiliation(s)
- Luelue Huang
- School of Applied Chemistry and BiotechnologyShenzhen PolytechnicShenzhenGuangdongChina
| | - Chen Li
- Shenzhen Institute of Terahertz Technology and InnovationShenzhenGuangdongChina
| | - Bin Li
- School of Applied Chemistry and BiotechnologyShenzhen PolytechnicShenzhenGuangdongChina
| | - Miaoling Liu
- School of Applied Chemistry and BiotechnologyShenzhen PolytechnicShenzhenGuangdongChina
| | - Miaomiao Lian
- College of Food and BioengineeringHenan University of Science and TechnologyLuoyangChina
| | - Shaozhuang Yang
- Shenzhen Institute of Terahertz Technology and InnovationShenzhenGuangdongChina
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18
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Zhang J, Wu X, Liu L, Huang C, Chen X, Tian Z, Ouyang C, Gu J, Zhang X, He M, Han J, Luo X, Zhang W. Ultra-broadband microwave metamaterial absorber with tetramethylurea inclusion. OPTICS EXPRESS 2019; 27:25595-25602. [PMID: 31510429 DOI: 10.1364/oe.27.025595] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Accepted: 07/19/2019] [Indexed: 06/10/2023]
Abstract
The absorption region of a water-based absorber was expanded by introducing tetramethylurea (TMU) into the inclusion, whose dielectric properties are tunable through the concentration of TMU. The dielectric spectroscopy of a TMU/water mixture was deconstructed using a Debye model. We designed a four-layer ultra-broadband microwave absorber with a supernatant micro-structure. Simulation and experiment results indicate that the absorber can achieve 90% perfect absorption, covering a broad frequency range of 4-40 GHz. The concentration dependence of the absorber was also studied experimentally and numerically. The concentration control provides a more practical and large frequency-region modulation of perfect absorption.
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19
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Morales-Hernández JA, Singh AK, Villanueva-Rodriguez SJ, Castro-Camus E. Hydration shells of carbohydrate polymers studied by calorimetry and terahertz spectroscopy. Food Chem 2019; 291:94-100. [DOI: 10.1016/j.foodchem.2019.03.132] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 03/21/2019] [Accepted: 03/25/2019] [Indexed: 11/15/2022]
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20
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Smolyanskaya OA, Lazareva EN, Nalegaev SS, Petrov NV, Zaytsev KI, Timoshina PA, Tuchina DK, Toropova YG, Kornyushin OV, Babenko AY, Guillet JP, Tuchin VV. Multimodal Optical Diagnostics of Glycated Biological Tissues. BIOCHEMISTRY (MOSCOW) 2019; 84:S124-S143. [PMID: 31213199 DOI: 10.1134/s0006297919140086] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Diabetes mellitus is a metabolic disorder characterized by chronic hyperglycemia accompanied by the disruption of carbohydrate, lipid, and proteins metabolism and development of long-term microvascular, macrovascular, and neuropathic changes. This review presents the results of spectroscopic studies on the glycation of tissues and cell proteins in organisms with naturally developing and model diabetes and in vitro glycated samples in a wide range of electromagnetic waves, from visible light to terahertz radiation. Experiments on the refractometric measurements of glycated and oxygenated hemoglobin in broad wavelength and temperature ranges using digital holographic microscopy and diffraction tomography are discussed, as well as possible application of these methods in the diabetes diagnostics. It is shown that the development and implementation of multimodal approaches based on a combination of phase diagnostics with other methods is another promising direction in the diabetes diagnostics. The possibilities of using optical clearing agents for monitoring the diffusion of substances in the glycated tissues and blood flow dynamics in the pancreas of animals with induced diabetes have also been analyzed.
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Affiliation(s)
| | - E N Lazareva
- Saratov State University, Saratov, 410012, Russia.,Tomsk State University, Tomsk, 634050, Russia
| | | | - N V Petrov
- ITMO University, St. Petersburg, 197101, Russia
| | - K I Zaytsev
- Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow, 119991, Russia.,Institute of Regenerative Medicine, Sechenov First Moscow State Medical University, Moscow, 119991, Russia.,Bauman Moscow State Technical University, Moscow, 105005, Russia
| | - P A Timoshina
- Saratov State University, Saratov, 410012, Russia.,Tomsk State University, Tomsk, 634050, Russia
| | - D K Tuchina
- Saratov State University, Saratov, 410012, Russia.,Tomsk State University, Tomsk, 634050, Russia.,Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow, 119991, Russia
| | - Ya G Toropova
- Almazov National Medical Research Centre, St. Petersburg, 197341, Russia
| | - O V Kornyushin
- Almazov National Medical Research Centre, St. Petersburg, 197341, Russia
| | - A Yu Babenko
- Almazov National Medical Research Centre, St. Petersburg, 197341, Russia
| | - J-P Guillet
- IMS Laboratory, University of Bordeaux, Talence, 33405, France
| | - V V Tuchin
- ITMO University, St. Petersburg, 197101, Russia.,Saratov State University, Saratov, 410012, Russia.,Tomsk State University, Tomsk, 634050, Russia.,Institute of Precision Mechanics and Control, Russian Academy of Sciences, Saratov, 410028, Russia
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21
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Heid E, Honegger P, Braun D, Szabadi A, Stankovic T, Steinhauser O, Schröder C. Computational spectroscopy of trehalose, sucrose, maltose, and glucose: A comprehensive study of TDSS, NQR, NOE, and DRS. J Chem Phys 2019; 150:175102. [DOI: 10.1063/1.5095058] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Affiliation(s)
- Esther Heid
- University of Vienna, Faculty of Chemistry, Department of Computational Biological Chemistry, Währingerstraße 17, A-1090 Vienna, Austria
| | - Philipp Honegger
- University of Vienna, Faculty of Chemistry, Department of Computational Biological Chemistry, Währingerstraße 17, A-1090 Vienna, Austria
| | - Daniel Braun
- University of Vienna, Faculty of Chemistry, Department of Computational Biological Chemistry, Währingerstraße 17, A-1090 Vienna, Austria
- Department of Structural and Computational Biology, Max F. Perutz Laboratories, University of Vienna, Campus Vienna Biocenter 5, 1030 Vienna, Austria
| | - András Szabadi
- University of Vienna, Faculty of Chemistry, Department of Computational Biological Chemistry, Währingerstraße 17, A-1090 Vienna, Austria
| | - Toda Stankovic
- University of Vienna, Faculty of Chemistry, Department of Computational Biological Chemistry, Währingerstraße 17, A-1090 Vienna, Austria
| | - Othmar Steinhauser
- University of Vienna, Faculty of Chemistry, Department of Computational Biological Chemistry, Währingerstraße 17, A-1090 Vienna, Austria
| | - Christian Schröder
- University of Vienna, Faculty of Chemistry, Department of Computational Biological Chemistry, Währingerstraße 17, A-1090 Vienna, Austria
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22
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Baccile N, Delbeke EIP, Brennich M, Seyrig C, Everaert J, Roelants SLKW, Soetaert W, Van Bogaert INA, Van Geem KM, Stevens CV. Asymmetrical, Symmetrical, Divalent, and Y-Shaped (Bola)amphiphiles: The Relationship between the Molecular Structure and Self-Assembly in Amino Derivatives of Sophorolipid Biosurfactants. J Phys Chem B 2019; 123:3841-3858. [DOI: 10.1021/acs.jpcb.9b01013] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Niki Baccile
- Sorbonne Université,
Centre National de la Recherche Scientifique, Laboratoire de Chimie
de la Matière Condensée de Paris, LCMCP, F-75005 Paris, France
| | - Elisabeth I. P. Delbeke
- Laboratory for Chemical Technology (LCT), Department of Materials, Textiles and Chemical Engineering, Ghent University, Technologiepark 125, 9052 Ghent, Belgium
| | - Martha Brennich
- European Molecular Biology Laboratory, Synchrotron Crystallography Group, 71 Avenue des Martyrs, 38042 Grenoble, France
| | - Chloé Seyrig
- Sorbonne Université,
Centre National de la Recherche Scientifique, Laboratoire de Chimie
de la Matière Condensée de Paris, LCMCP, F-75005 Paris, France
| | | | | | - Wim Soetaert
- Bio Base Europe Pilot Plant (BBEU), Rodenhuizenkaai 1, 9042 Ghent (Desteldonk), Belgium
| | | | - Kevin M. Van Geem
- Laboratory for Chemical Technology (LCT), Department of Materials, Textiles and Chemical Engineering, Ghent University, Technologiepark 125, 9052 Ghent, Belgium
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23
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Yusuf H, Nugraheni RW, Setyawan D. Effect of cellulose derivative matrix and oligosaccharide on the solid state and physical characteristics of dimethyldioctadecylammoniumliposomes for vaccine. Res Pharm Sci 2019; 14:1-11. [PMID: 30936927 PMCID: PMC6407333 DOI: 10.4103/1735-5362.251847] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
The present study was to investigate the effect of cellulose matrix and oligosaccharide on solid state and morphology characteristics of freeze-dried cationic dimethyldioctadecylammonium (DDA)-based liposomes encapsulating ovalbumin (OVA). The OVA-containing liposomes were protected using cellulose derivative matrix and oligosaccharide. Despite the fact that saccharides are known to preserve protein and lipid membranes during drying, however, collapse structure are often addressed. In other side, cellulose matrix potentially prevents collapsing as it has been widely used for matrix in drug delivery formulations to increase the mass for compact matrices of resultant products. Their solid state characteristics were determined in terms of their crystallinity using X-Ray diffraction (XRD), thermal properties and detection of phase separation using differential scanning calorimetry (DSC). Furthermore, their morphology was observed using scanning electron microscopy and transmission electron microscopy. The study revealed that formulation with either oligosaccharide and cellulose matrix demonstrated a miscible mixture with DDA and soy phosphatidylcholine (SPC) that might construct stable dried liposomal formulation. Phase separation was not observed in formula with combination of oligosaccharide and cellulose matrix where their DSC thermograms showed glass transition indicating amorphous structure and miscible mixture. XRD confirmed the absence of crystal-like properties, demonstrating prevented crystallization. The dry products were porous with spherical liposomes trapped in the matrices, signifying the ease in reconstitution. Furthermore, OVA were well-preserved as its recovery was more than 80%. The preservation of both liposomes and protein antigen were found to be dependent upon the incorporation of both oligosaccharide and cellulose matrix included in the formulation.
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Affiliation(s)
- Helmy Yusuf
- Department of Pharmaceutics, Universitas Airlangga, Indonesia
| | | | - Dwi Setyawan
- Department of Pharmaceutics, Universitas Airlangga, Indonesia
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24
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Arai K, Shikata T. Molecular motions, structure and hydration behaviour of glucose oligomers in aqueous solution. Phys Chem Chem Phys 2019; 21:25379-25388. [DOI: 10.1039/c9cp05214c] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The presence of helical fragment configurations is confirmed for glucose oligomers in aqueous solution at temperatures lower than 40 °C.
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Affiliation(s)
- Kengo Arai
- Department of Symbiotic Science of Environment and Natural Resources
- The United Graduate School of Agricultural Science
- Tokyo University of Agriculture and Technology
- Tokyo 183-8509
- Japan
| | - Toshiyuki Shikata
- Department of Symbiotic Science of Environment and Natural Resources
- The United Graduate School of Agricultural Science
- Tokyo University of Agriculture and Technology
- Tokyo 183-8509
- Japan
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25
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Wei L, Yu L, Jiaoqi H, Guorong H, Yang Z, Weiling F. Application of terahertz spectroscopy in biomolecule detection. ACTA ACUST UNITED AC 2018. [DOI: 10.1016/j.flm.2019.05.001] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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26
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Shiraga K, Adachi A, Nakamura M, Tajima T, Ajito K, Ogawa Y. Characterization of the hydrogen-bond network of water around sucrose and trehalose: Microwave and terahertz spectroscopic study. J Chem Phys 2018; 146:105102. [PMID: 28298096 DOI: 10.1063/1.4978232] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Modification of the water hydrogen bond network imposed by disaccharides is known to serve as a bioprotective agent in living organisms, though its comprehensive understanding is still yet to be reached. In this study, aiming to characterize the dynamical slowing down and destructuring effect of disaccharides, we performed broadband dielectric spectroscopy, ranging from 0.5 GHz to 12 THz, of sucrose and trehalose aqueous solutions. The destructuring effect was examined in two ways (the hydrogen bond fragmentation and disordering) and our result showed that both sucrose and trehalose exhibit an obvious destructuring effect with a similar strength, by fragmenting hydrogen bonds and distorting the tetrahedral-like structure of water. This observation strongly supports a chaotropic (structure-breaking) aspect of disaccharides on the water structure. At the same time, hydration water was found to exhibit slower dynamics and a greater reorientational cooperativity than bulk water because of the strengthened hydrogen bonds. These results lead to the conclusion that strong disaccharide-water hydrogen bonds structurally incompatible with native water-water bonds lead to the rigid but destructured hydrogen bond network around disaccharides. Another important finding in this study is that the greater dynamical slowing down of trehalose was found compared with that of sucrose, at variance with the destructuring effect where no solute dependent difference was observed. This discovery suggests that the exceptionally greater bioprotective impact especially of trehalose among disaccharides is mainly associated with the dynamical slowing down (rather than the destructuring effect).
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Affiliation(s)
- Keiichiro Shiraga
- Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Aya Adachi
- Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Masahito Nakamura
- NTT Device Technology Labs, NTT Corporation, Morinosato Wakamiya, Atsugi-shi, Kanagawa 243-0198, Japan
| | - Takuro Tajima
- NTT Device Technology Labs, NTT Corporation, Morinosato Wakamiya, Atsugi-shi, Kanagawa 243-0198, Japan
| | - Katsuhiro Ajito
- NTT Device Technology Labs, NTT Corporation, Morinosato Wakamiya, Atsugi-shi, Kanagawa 243-0198, Japan
| | - Yuichi Ogawa
- Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
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27
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Shiraga K, Ogawa Y, Tanaka K, Arikawa T, Yoshikawa N, Nakamura M, Ajito K, Tajima T. Coexistence of Kosmotropic and Chaotropic Impacts of Urea on Water As Revealed by Terahertz Spectroscopy. J Phys Chem B 2018; 122:1268-1277. [DOI: 10.1021/acs.jpcb.7b11839] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Keiichiro Shiraga
- RIKEN Center for Integrative Medical Sciences (IMS), Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa 230-0045, Japan
| | | | - Koichiro Tanaka
- Institute
for Integrated Cell-Material Sciences (iCeMS), Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | | | | | - Masahito Nakamura
- NTT
Device Technology Labs, NTT Corporation, Morinosato Wakamiya, Atsugi, Kanagawa 243-0198, Japan
| | - Katsuhiro Ajito
- NTT
Device Technology Labs, NTT Corporation, Morinosato Wakamiya, Atsugi, Kanagawa 243-0198, Japan
| | - Takuro Tajima
- NTT
Device Technology Labs, NTT Corporation, Morinosato Wakamiya, Atsugi, Kanagawa 243-0198, Japan
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28
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Furuki T, Sakurai M. Physicochemical Aspects of the Biological Functions of Trehalose and Group 3 LEA Proteins as Desiccation Protectants. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1081:271-286. [PMID: 30288715 DOI: 10.1007/978-981-13-1244-1_15] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
In this review, we first focus on the mechanism by which the larva of the sleeping chironomid, Polypedilum vanderplanki, survives an extremely dehydrated state and describe how trehalose and probably late embryogenesis abundant (LEA) proteins work as desiccation protectants. Second, we summarize the solid-state and solution properties of trehalose and discuss why trehalose works better than other disaccharides as a desiccation protectant. Third, we describe the structure and function of two model peptides based on group 3 LEA proteins after a short introduction of native LEA proteins themselves. Finally, we present our conclusions and a perspective on the application of trehalose and LEA model peptides to the long-term storage of biological materials.
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Affiliation(s)
- Takao Furuki
- Center for Biological Resources and Informatics, Tokyo Institute of Technology, Yokohama, Japan
| | - Minoru Sakurai
- Center for Biological Resources and Informatics, Tokyo Institute of Technology, Yokohama, Japan.
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29
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Pulikkathara M, Mark C, Kumar N, Zaske AM, Serda RE. Sucrose modulation of radiofrequency-induced heating rates and cell death. CONVERGENT SCIENCE PHYSICAL ONCOLOGY 2017; 3. [PMID: 29177085 DOI: 10.1088/2057-1739/aa757b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Background Applied radiofrequency (RF) energy induces hyperthermia in tissues, facilitating vascular perfusion This study explores the impact of RF radiation on the integrity of the luminal endothelium, and then predominately explores the impact of altering the conductivity of biologically-relevant solutions on RF-induced heating rates and cell death. The ability of cells to survive high sucrose (i.e. hyperosmotic conditions) to achieve lower conductivity as a mechanism for directing hyperthermia is evaluated. Methods RF radiation was generated using a capacitively-coupled radiofrequency system operating at 13.56 MHz. Temperatures were recorded using a FLIR SC 6000 infrared camera. Results RF radiation reduced cell-to-cell connections among endothelial cells and altered cell morphology towards a more rounded appearance at temperatures reported to cause in vivo vessel deformation. Isotonic solutions containing high sucrose and low levels of NaCl displayed low conductivity and faster heating rates compared to high salt solutions. Heating rates were positively correlated with cell death. Addition of sucrose to serum similarly reduced conductivity and increased heating rates in a dose-dependent manner. Cellular proliferation was normal for cells grown in media supplemented with 125 mM sucrose for 24 hours or for cells grown in 750 mM sucrose for 10 minutes followed by a 24 h recovery period. Conclusions Sucrose is known to form weak hydrogen bonds in fluids as opposed to ions, freeing water molecules to rotate in an oscillating field of electromagnetic radiation and contributing to heat induction. The ability of cells to survive temporal exposures to hyperosmotic (i.e. elevated sucrose) conditions creates an opportunity to use sucrose or other saccharides to selectively elevate heating in specific tissues upon exposure to a radiofrequency field.
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Affiliation(s)
- Merlyn Pulikkathara
- Michael E. DeBakey Department of Surgery, Baylor College of Medicine, Houston, TX 77030, USA (location where research was performed)
| | - Colette Mark
- Michael E. DeBakey Department of Surgery, Baylor College of Medicine, Houston, TX 77030, USA (location where research was performed)
| | - Natasha Kumar
- Michael E. DeBakey Department of Surgery, Baylor College of Medicine, Houston, TX 77030, USA (location where research was performed)
| | - Ana Maria Zaske
- IM Bioscope 2 UT Core Facility, The University of Texas Health Science Center at Houston, Houston, TX 77054, USA
| | - Rita E Serda
- Michael E. DeBakey Department of Surgery, Baylor College of Medicine, Houston, TX 77030, USA (location where research was performed).,Department of Chemical and Biological Engineering, University of New Mexico, Albuquerque, NM 87106, USA (current location)
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30
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Biomedical Applications of Terahertz Spectroscopy and Imaging. Trends Biotechnol 2017; 34:810-824. [PMID: 27207226 DOI: 10.1016/j.tibtech.2016.04.008] [Citation(s) in RCA: 235] [Impact Index Per Article: 33.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2016] [Revised: 04/08/2016] [Accepted: 04/14/2016] [Indexed: 12/16/2022]
Abstract
Terahertz (THz=10(12)Hz) radiation has attracted wide attention for its unprecedented sensing ability and its noninvasive and nonionizing properties. Tremendous strides in THz instrumentation have prompted impressive breakthroughs in THz biomedical research. Here, we review the current state of THz spectroscopy and imaging in various biomedical applications ranging from biomolecules, including DNA/RNA, amino acids/peptides, proteins, and carbohydrates, to cells and tissues. We also address the potential biological effects of THz radiation during its biological applications and propose future prospects for this cutting-edge technology.
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31
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Restrepo-Espinosa DC, Román Y, Colorado-Ríos J, de Santana-Filho AP, Sassaki GL, Cipriani TR, Martínez A, Iacomini M, Pavão MSG. Structural analysis of a sulfated galactan from the tunic of the ascidian Microcosmus exasperatus and its inhibitory effect of the intrinsic coagulation pathway. Int J Biol Macromol 2017; 105:1391-1400. [PMID: 28867226 DOI: 10.1016/j.ijbiomac.2017.08.166] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Revised: 08/24/2017] [Accepted: 08/30/2017] [Indexed: 01/22/2023]
Abstract
Several bioactive sulfated galactans have been isolated from the tunic of different species of ascidians. The biological activity of this kind of polysaccharides has been related with the presence and position of sulfate groups, and by the chemical composition of this kind of polysaccharides. A sulfated galactan (1000RS) was isolated from the tunic of the Brazilian ascidia Microcosmus exasperatus through proteolytic digestion, ethanol precipitation, dialysis and freeze-thaw cycles. Homogeneity and molecular weight were estimated by using size exclusion chromatography. Monosaccharide composition and type of linkage were assessed by Gas chromatography coupled to mass spectrometry and the sulfate content was quantified through gelatin/BaCl2 method. These experiments along with NMR and FTIR analysis allowed to claim that the galactan backbone is mainly composed of 4-linked α-l-Galp units. In addition, they permitted to establish that some of the galactose residues are sulfated at the 3-position. This sulfated polysaccharide, which has an average molecular mass of 439.5kDa, presents anticoagulant effect in a dose-dependent manner through the inhibition of the intrinsic coagulation pathway.
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Affiliation(s)
- Diana C Restrepo-Espinosa
- Productos Naturales Marinos, Departamento de Farmacia, Facultad de Ciencias Farmacéuticas y Alimentarias, Universidad de Antioquia UdeA, Calle 70 N° 52-21, CP 050010234, Medellín, Colombia.
| | - Yony Román
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Paraná, CEP 81531-980, CP 19046, Curitiba, Paraná, Brazil.
| | - Jhonny Colorado-Ríos
- Productos Naturales Marinos, Departamento de Farmacia, Facultad de Ciencias Farmacéuticas y Alimentarias, Universidad de Antioquia UdeA, Calle 70 N° 52-21, CP 050010234, Medellín, Colombia.
| | | | - Guilherme Lanzi Sassaki
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Paraná, CEP 81531-980, CP 19046, Curitiba, Paraná, Brazil.
| | - Thales R Cipriani
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Paraná, CEP 81531-980, CP 19046, Curitiba, Paraná, Brazil.
| | - Alejandro Martínez
- Productos Naturales Marinos, Departamento de Farmacia, Facultad de Ciencias Farmacéuticas y Alimentarias, Universidad de Antioquia UdeA, Calle 70 N° 52-21, CP 050010234, Medellín, Colombia.
| | - Marcello Iacomini
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Paraná, CEP 81531-980, CP 19046, Curitiba, Paraná, Brazil.
| | - Mauro S G Pavão
- Laboratório de Bioquímica e Biologia Celular de Glicoconjugados, Instituto de Bioquímica Médica Leopoldo de Méis-Universidade Federal do Rio de Janeiro, CEP 21941-913, Rio de Janeiro, Brazil.
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32
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Affiliation(s)
- Kengo Arai
- Department
of Symbiotic Science of Environment and Natural Resources,
The United Graduate School of Agriculture, and ‡Division of Natural Resources and
Eco-materials, Graduate School of Agriculture Science, Tokyo University of Agriculture and Technology, 3-5-8
Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
| | - Toshiyuki Shikata
- Department
of Symbiotic Science of Environment and Natural Resources,
The United Graduate School of Agriculture, and ‡Division of Natural Resources and
Eco-materials, Graduate School of Agriculture Science, Tokyo University of Agriculture and Technology, 3-5-8
Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
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33
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Shiraga K, Ogawa Y, Kondo N. Hydrogen Bond Network of Water around Protein Investigated with Terahertz and Infrared Spectroscopy. Biophys J 2017; 111:2629-2641. [PMID: 28002739 DOI: 10.1016/j.bpj.2016.11.011] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2016] [Revised: 11/14/2016] [Accepted: 11/15/2016] [Indexed: 11/16/2022] Open
Abstract
The dynamical and structural properties of water at protein interfaces were characterized on the basis of the broadband complex dielectric constant (0.25 to 400 THz) of albumin aqueous solutions. Our analysis of the dielectric responses between 0.25 and 12 THz first revealed hydration water with retarded reorientational dynamics extending ∼8.5 Å (corresponding to three to four layers) out from the albumin surface. Second, the number of nonhydrogen-bonded water was decreased in the presence of the albumin solute, indicating protein inhibits the fragmentation of the water hydrogen-bond network. Finally, water molecules at the albumin interface were found to form a distorted hydrogen-bond structure due to topological and energetic disorder of the protein surface. In addition, the intramolecular O-H stretching vibration of water (∼100 THz), which is sensitive to hydrogen-bond environment, pointed to a trend that hydration water has a larger population of strongly hydrogen-bonded water molecules compared with that of bulk water. From these experimental results, we concluded that the "strengthened" water hydrogen bonds at the protein interface dynamically slow down the reorientational motion of water and form the less-defective hydrogen-bond network by inhibiting the fragmentation of water-water hydrogen bonds. Nevertheless, such a strengthened water hydrogen-bond network is composed of heterogeneous hydrogen-bond distances and angles, and thus characterized as structurally "distorted."
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Affiliation(s)
| | - Yuichi Ogawa
- Graduate School of Agriculture, Kyoto University, Kyoto, Japan
| | - Naoshi Kondo
- Graduate School of Agriculture, Kyoto University, Kyoto, Japan
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34
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Characterization of the hydrogen-bond network of water around sucrose and trehalose: H-O-H bending analysis. Chem Phys Lett 2017. [DOI: 10.1016/j.cplett.2017.04.023] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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35
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Hydrophobicity of carbohydrates and related hydroxy compounds. Carbohydr Res 2017; 446-447:101-112. [PMID: 28554012 DOI: 10.1016/j.carres.2017.04.019] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2017] [Revised: 04/13/2017] [Indexed: 11/21/2022]
Abstract
The hydrophobic interaction of carbohydrates and other hydroxy compounds with a C18-modified silica gel column was measured with pure water as eluent, thereby expanding the range of measurements already published. The interaction is augmented by structure strengthening salts and decreasing temperature. Although the interaction of the solute with the hydrophobic interface is expected to only imperfectly reflect its state in aqueous bulk solution, the retention can be correlated to hydration numbers calculated from molecular mechanics studies given in the literature. No correlation can be established towards published hydration numbers obtained by physical methods (isentropic compressibility, O-17 NMR relaxation, terahertz spectroscopy, and viscosity). The hydrophobicity is discussed with respect to the chemical structure. It increases with the fraction and size of hydrophobic molecular surface regions.
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36
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Cherkasova O, Nazarov M, Shkurinov A. Properties of aqueous solutions in THz frequency range. ACTA ACUST UNITED AC 2017. [DOI: 10.1088/1742-6596/793/1/012005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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37
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Zeng Z, Bernstein ER. Photoelectron spectroscopy and density functional theory studies of (fructose + (H 2O) n) − ( n = 1–5) anionic clusters. Phys Chem Chem Phys 2017; 19:31121-31137. [DOI: 10.1039/c7cp06625b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
(Fructose + (H2O)n)− (n = 1–5) cluster anions mainly exist as open chain structures. Some cyclic structures of (fructose + (H2O)n)− (n = 3, 4) are present too.
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Affiliation(s)
- Zhen Zeng
- Department of Chemistry
- NSF ERC for Extreme Ultraviolet Science and Technology
- Colorado State University
- Fort Collins
- USA
| | - Elliot R. Bernstein
- Department of Chemistry
- NSF ERC for Extreme Ultraviolet Science and Technology
- Colorado State University
- Fort Collins
- USA
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38
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Heid E, Schröder C. Computational solvation dynamics of oxyquinolinium betaine linked to trehalose. J Chem Phys 2016; 145:164507. [DOI: 10.1063/1.4966189] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Affiliation(s)
- Esther Heid
- Faculty of Chemistry, Department of Computational Biological Chemistry, University of Vienna, Währingerstraße 19, A-1090 Vienna, Austria
| | - Christian Schröder
- Faculty of Chemistry, Department of Computational Biological Chemistry, University of Vienna, Währingerstraße 19, A-1090 Vienna, Austria
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39
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Ma K, Zhao L. The Opposite Effect of Metal Ions on Short-/Long-Range Water Structure: A Multiple Characterization Study. Int J Mol Sci 2016; 17:ijms17050602. [PMID: 27120598 PMCID: PMC4881438 DOI: 10.3390/ijms17050602] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Revised: 04/14/2016] [Accepted: 04/18/2016] [Indexed: 12/21/2022] Open
Abstract
Inorganic electrolyte solutions are very important in our society as they dominate many biochemical and geochemical processes. Herein, an in-depth study was performed to illustrate the ion-induced effect on water structure by coupling NMR, viscometer, Raman and Molecular Dynamic (MD) simulations. The NMR coefficient (BNMR) and diffusion coefficient (D) from NMR, and viscosity coefficient (Bvis) from a viscometer all proved that dissolved metal ions are capable of enhancing the association degree of adjacent water molecules, and the impact on water structure decreased in the order of Cr3+ > Fe3+ > Cu2+ > Zn2+. This regularity was further evidenced by Raman analysis; however, the deconvoluted Raman spectrum indicated the decrease in high association water with salt concentration and the increase in low association water before 200 mmol·L−1. By virtue of MD simulations, the opposite changing manner proved to be the result of the opposite effect on short-/long-range water structure induced by metal ions. Our results may help to explain specific protein denaturation induced by metal ions.
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Affiliation(s)
- Kai Ma
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China.
| | - Lin Zhao
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China.
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40
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Kapla J, Engström O, Stevensson B, Wohlert J, Widmalm G, Maliniak A. Molecular dynamics simulations and NMR spectroscopy studies of trehalose-lipid bilayer systems. Phys Chem Chem Phys 2015; 17:22438-47. [PMID: 26252429 DOI: 10.1039/c5cp02472b] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The disaccharide trehalose (TRH) strongly affects the physical properties of lipid bilayers. We investigate interactions between lipid membranes formed by 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC) and TRH using NMR spectroscopy and molecular dynamics (MD) computer simulations. We compare dipolar couplings derived from DMPC/TRH trajectories with those determined (i) experimentally in TRH using conventional high-resolution NMR in a weakly ordered solvent (bicelles), and (ii) by solid-state NMR in multilamellar vesicles (MLV) formed by DMPC. Analysis of the experimental and MD-derived couplings in DMPC indicated that the force field used in the simulations reasonably well describes the experimental results with the exception for the glycerol fragment that exhibits significant deviations. The signs of dipolar couplings, not available from the experiments on highly ordered systems, were determined from the trajectory analysis. The crucial step in the analysis of residual dipolar couplings (RDCs) in TRH determined in a bicelle-environment was access to the conformational distributions derived from the MD trajectory. Furthermore, the conformational behavior of TRH, investigated by J-couplings, in the ordered and isotropic phases is essentially identical, indicating that the general assumptions in the analyses of RDCs are well founded.
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Affiliation(s)
- Jon Kapla
- Department of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden.
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41
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Shiraga K, Suzuki T, Kondo N, Tajima T, Nakamura M, Togo H, Hirata A, Ajito K, Ogawa Y. Broadband dielectric spectroscopy of glucose aqueous solution: Analysis of the hydration state and the hydrogen bond network. J Chem Phys 2015; 142:234504. [DOI: 10.1063/1.4922482] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Keiichiro Shiraga
- Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Tetsuhito Suzuki
- Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Naoshi Kondo
- Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Takuro Tajima
- NTT Device Technology Laboratories, NTT Corporation, Morinosato Wakamiya, Atsugi-shi, Kanagawa 243-0198, Japan
| | - Masahito Nakamura
- NTT Device Technology Laboratories, NTT Corporation, Morinosato Wakamiya, Atsugi-shi, Kanagawa 243-0198, Japan
| | - Hiroyoshi Togo
- Science and Core Technology Laboratories, NTT Corporation, Morinosato Wakamiya, Atsugi-shi, Kanagawa 243-0198, Japan
| | - Akihiko Hirata
- NTT Device Technology Laboratories, NTT Corporation, Morinosato Wakamiya, Atsugi-shi, Kanagawa 243-0198, Japan
| | - Katsuhiro Ajito
- NTT Device Technology Laboratories, NTT Corporation, Morinosato Wakamiya, Atsugi-shi, Kanagawa 243-0198, Japan
| | - Yuichi Ogawa
- Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
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42
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Shiraga K, Naito H, Suzuki T, Kondo N, Ogawa Y. Hydration and Hydrogen Bond Network of Water during the Coil-to-Globule Transition in Poly(N-isopropylacrylamide) Aqueous Solution at Cloud Point Temperature. J Phys Chem B 2015; 119:5576-87. [PMID: 25865253 DOI: 10.1021/acs.jpcb.5b01021] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Aqueous solutions of poly(N-isopropylacrylamide), P-NIPAAm, exhibit a noticeable temperature responsive change in molecular conformation at a cloud point temperature (Tcp). As the temperature rises above Tcp, the extended coil-like P-NIPAAm structure changes into a swollen globule-like conformation as hydration levels decrease and hydrophobic interactions increase. Though water plays an important role in this coil-to-globule transition of P-NIPAAm, the behavior of water molecules and the associated hydrogen-bond (HB) network of the surrounding bulk water are still veiled in uncertainty. In this study, we elucidate changes in the hydration state and the dynamical structure of the water HB network of P-NIPAAm aqueous solutions during the coil-to-globule transition by analyzing the complex dielectric constant in the terahertz region (0.25-12 THz), where bulk water reorientations and intermolecular vibrations of water can be selectively probed. The structural properties of the water HB network were examined in terms of the population of the non-HB water molecules (not directly engaged in the HB network or hydrated to P-NIPAAm) and the tetrahedral coordination of the water molecules engaged in the HB network. We found the hydration number below Tcp (≈10) was decreased to approximately 6.5 as temperature increased, in line with previous studies. The HB network of bulk water becomes more structured as the coil-to-globule phase transition takes place, via decreases in non-HB water and reduction in the orderliness of the tetrahedral HB architecture. Together these results indicate that the coil-to-globule transition is associated with a shift to hydrophobic-dominated interactions that drive thermoresponsive structural changes in the surrounding water molecules.
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Affiliation(s)
- Keiichiro Shiraga
- Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Hirotaka Naito
- Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Tetsuhito Suzuki
- Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Naoshi Kondo
- Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Yuichi Ogawa
- Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
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43
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Zhao L, Ma K, Yang Z. Changes of water hydrogen bond network with different externalities. Int J Mol Sci 2015; 16:8454-89. [PMID: 25884333 PMCID: PMC4425091 DOI: 10.3390/ijms16048454] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2015] [Revised: 04/01/2015] [Accepted: 04/08/2015] [Indexed: 11/16/2022] Open
Abstract
It is crucial to uncover the mystery of water cluster and structural motif to have an insight into the abundant anomalies bound to water. In this context, the analysis of influence factors is an alternative way to shed light on the nature of water clusters. Water structure has been tentatively explained within different frameworks of structural models. Based on comprehensive analysis and summary of the studies on the response of water to four externalities (i.e., temperature, pressure, solutes and external fields), the changing trends of water structure and a deduced intrinsic structural motif are put forward in this work. The variations in physicochemical and biological effects of water induced by each externality are also discussed to emphasize the role of water in our daily life. On this basis, the underlying problems that need to be further studied are formulated by pointing out the limitations attached to current study techniques and to outline prominent studies that have come up recently.
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Affiliation(s)
- Lin Zhao
- School of Environmental Science and Engineering, Tianjin University, No. 92 Weijin Road, Tianjin 300072, China.
- School of Chemical Engineering and Technology, Tianjin University, No. 92 Weijin Road, Tianjin 300072, China.
| | - Kai Ma
- School of Environmental Science and Engineering, Tianjin University, No. 92 Weijin Road, Tianjin 300072, China.
| | - Zi Yang
- School of Chemical Engineering and Technology, Tianjin University, No. 92 Weijin Road, Tianjin 300072, China.
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