1
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Bae SH, Yoo S, Lee J, Park HJ, Kwon SP, Jin H, Park SI, Lee YS, Bang YJ, Roh G, Lee S, Youn SB, Kim IW, Oh HR, El-Damasy AK, Keum G, Kim H, Youn H, Nam JH, Bang EK. A lipid nanoparticle platform incorporating trehalose glycolipid for exceptional mRNA vaccine safety. Bioact Mater 2024; 38:486-498. [PMID: 38779592 PMCID: PMC11109743 DOI: 10.1016/j.bioactmat.2024.05.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 04/06/2024] [Accepted: 05/05/2024] [Indexed: 05/25/2024] Open
Abstract
The rapid development of messenger RNA (mRNA) vaccines formulated with lipid nanoparticles (LNPs) has contributed to control of the COVID-19 pandemic. However, mRNA vaccines have raised concerns about their potential toxicity and clinical safety, including side effects, such as myocarditis, anaphylaxis, and pericarditis. In this study, we investigated the potential of trehalose glycolipids-containing LNP (LNP S050L) to reduce the risks associated with ionizable lipids. Trehalose glycolipids can form hydrogen bonds with polar biomolecules, allowing the formation of a stable LNP structure by replacing half of the ionizable lipids. The efficacy and safety of LNP S050L were evaluated by encapsulating the mRNA encoding the luciferase reporter gene and measuring gene expression and organ toxicity, respectively. Furthermore, mice immunized with an LNP S050L-formulated mRNA vaccine expressing influenza hemagglutinin exhibited a significant reduction in organ toxicity, including in the heart, spleen, and liver, while sustaining gene expression and immune efficiency, compared to conventional LNPs (Con-LNPs). Our findings suggest that LNP S050L, a trehalose glycolipid-based LNP, could facilitate the development of safe mRNA vaccines with improved clinical safety.
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Affiliation(s)
- Seo-Hyeon Bae
- Department of Medical and Biological Sciences, The Catholic University of Korea, Gyeonggi-do, Bucheon, Republic of Korea
- BK Four Department of Biotechnology, The Catholic University of Korea, Gyeonggi-do, Bucheon, Republic of Korea
| | - Soyeon Yoo
- Center for Brain Technology, Brain Science Institute, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea
| | - Jisun Lee
- Department of Medical and Biological Sciences, The Catholic University of Korea, Gyeonggi-do, Bucheon, Republic of Korea
| | - Hyo-Jung Park
- Department of Medical and Biological Sciences, The Catholic University of Korea, Gyeonggi-do, Bucheon, Republic of Korea
- BK Four Department of Biotechnology, The Catholic University of Korea, Gyeonggi-do, Bucheon, Republic of Korea
| | - Sung Pil Kwon
- Center for Brain Technology, Brain Science Institute, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea
| | - Harin Jin
- Center for Advanced Biomolecular Recognition, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea
- Division of Bio-Medical Science and Technology, KIST School, University of Science and Technology (UST), Seoul, Republic of Korea
| | - Sang-In Park
- SML Biopharm, Gwangmyeong, 14353, Republic of Korea
| | - Yu-Sun Lee
- Department of Medical and Biological Sciences, The Catholic University of Korea, Gyeonggi-do, Bucheon, Republic of Korea
- BK Four Department of Biotechnology, The Catholic University of Korea, Gyeonggi-do, Bucheon, Republic of Korea
| | - Yoo-Jin Bang
- Department of Medical and Biological Sciences, The Catholic University of Korea, Gyeonggi-do, Bucheon, Republic of Korea
- BK Four Department of Biotechnology, The Catholic University of Korea, Gyeonggi-do, Bucheon, Republic of Korea
| | - Gahyun Roh
- Department of Medical and Biological Sciences, The Catholic University of Korea, Gyeonggi-do, Bucheon, Republic of Korea
- BK Four Department of Biotechnology, The Catholic University of Korea, Gyeonggi-do, Bucheon, Republic of Korea
| | - Seonghyun Lee
- Department of Medical and Biological Sciences, The Catholic University of Korea, Gyeonggi-do, Bucheon, Republic of Korea
- BK Four Department of Biotechnology, The Catholic University of Korea, Gyeonggi-do, Bucheon, Republic of Korea
| | - Sue Bean Youn
- Department of Medical and Biological Sciences, The Catholic University of Korea, Gyeonggi-do, Bucheon, Republic of Korea
- BK Four Department of Biotechnology, The Catholic University of Korea, Gyeonggi-do, Bucheon, Republic of Korea
| | - In Woo Kim
- Cancer Research Institute, Seoul National University College of Medicine, Seoul, 03080, Republic of Korea
| | - Ho Rim Oh
- Cancer Research Institute, Seoul National University College of Medicine, Seoul, 03080, Republic of Korea
| | - Ashraf K. El-Damasy
- Center for Brain Technology, Brain Science Institute, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea
| | - Gyochang Keum
- Center for Brain Technology, Brain Science Institute, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea
| | - Hojun Kim
- Center for Advanced Biomolecular Recognition, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea
- Division of Bio-Medical Science and Technology, KIST School, University of Science and Technology (UST), Seoul, Republic of Korea
| | - Hyewon Youn
- Cancer Research Institute, Seoul National University College of Medicine, Seoul, 03080, Republic of Korea
- Department of Nuclear Medicine, Cancer Imaging Center, Seoul National University Hospital, Seoul, 03080, Republic of Korea
| | - Jae-Hwan Nam
- Department of Medical and Biological Sciences, The Catholic University of Korea, Gyeonggi-do, Bucheon, Republic of Korea
- BK Four Department of Biotechnology, The Catholic University of Korea, Gyeonggi-do, Bucheon, Republic of Korea
| | - Eun-Kyoung Bang
- Center for Brain Technology, Brain Science Institute, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea
- KHU-KIST Department of Converging Science and Technology, Graduate School, Kyung Hee University, Seoul, 02447, Republic of Korea
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2
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Lupi L, Gallo P. Glassy dynamics of water in TIP4P/Ice aqueous solutions of trehalose in comparison with the bulk phase. J Chem Phys 2023; 159:154504. [PMID: 37850697 DOI: 10.1063/5.0168933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Accepted: 09/25/2023] [Indexed: 10/19/2023] Open
Abstract
We perform molecular dynamics simulations of TIP4P/Ice water in solution with trehalose for 3.65 and 18.57 wt. % concentrations and of bulk TIP4P/Ice water at ambient pressure, to characterize the structure and dynamics of water in a sugar aqueous solution in the supercooled region. We find here that TIP4P/Ice water in solution with trehalose molecules follows the Mode Coupling Theory and undergoes a fragile to strong transition up to the highest concentration investigated, similar to the bulk. Moreover, we perform a Mode Coupling Theory test, showing that the Time Temperature Superposition principle holds for both bulk TIP4P/Ice water and for TIP4P/Ice water in the solutions and we calculate the exponents of the theory. The direct comparison of the dynamical results for bulk water and water in the solutions shows upon cooling along the isobar a fastening of water dynamics for lower temperatures, T < 240 K. We found that the counter-intuitive behavior for the low temperature solutions can be explained with the diffusion anomaly of water leading us to the conclusion that the fastening observed below T = 240 K in water dynamics is only fictitious, due to the fact that the density of water molecules in the solutions is higher than the density of the bulk at the same temperature and pressure. This result should be taken into account in experimental investigations which are often carried out at constant pressure.
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Affiliation(s)
- Laura Lupi
- Dipartimento di Matematica e Fisica, Università Roma Tre, Via della Vasca Navale 84, 00146 Rome, Italy
| | - Paola Gallo
- Dipartimento di Matematica e Fisica, Università Roma Tre, Via della Vasca Navale 84, 00146 Rome, Italy
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3
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Wortmann M, Keil W, Diestelhorst E, Westphal M, Haverkamp R, Brockhagen B, Biedinger J, Bondzio L, Weinberger C, Baier D, Tiemann M, Hütten A, Hellweg T, Reiss G, Schmidt C, Sattler K, Frese N. Hard carbon microspheres with bimodal size distribution and hierarchical porosity via hydrothermal carbonization of trehalose. RSC Adv 2023; 13:14181-14189. [PMID: 37180004 PMCID: PMC10170240 DOI: 10.1039/d3ra01301d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2023] [Accepted: 05/03/2023] [Indexed: 05/15/2023] Open
Abstract
Hydrothermal carbonization (HTC) is an efficient thermochemical method for the conversion of organic feedstock to carbonaceous solids. HTC of different saccharides is known to produce microspheres (MS) with mostly Gaussian size distribution, which are utilized as functional materials in various applications, both as pristine MS and as a precursor for hard carbon MS. Although the average size of the MS can be influenced by adjusting the process parameters, there is no reliable mechanism to affect their size distribution. Our results demonstrate that HTC of trehalose, in contrast to other saccharides, results in a distinctly bimodal sphere diameter distribution consisting of small spheres with diameters of (2.1 ± 0.2) μm and of large spheres with diameters of (10.4 ± 2.6) μm. Remarkably, after pyrolytic post-carbonization at 1000 °C the MS develop a multimodal pore size distribution with abundant macropores > 100 nm, mesopores > 10 nm and micropores < 2 nm, which were examined by small-angle X-ray scattering and visualized by charge-compensated helium ion microscopy. The bimodal size distribution and hierarchical porosity provide an extraordinary set of properties and potential variables for the tailored synthesis of hierarchical porous carbons, making trehalose-derived hard carbon MS a highly promising material for applications in catalysis, filtration, and energy storage devices.
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Affiliation(s)
- Martin Wortmann
- Faculty of Physics, Bielefeld University Universitätsstraße 25 33615 Bielefeld Germany
| | - Waldemar Keil
- Department of Chemistry, Paderborn University Warburger Straße 100 33098 Paderborn Germany
| | - Elise Diestelhorst
- Faculty of Engineering and Mathematics, Bielefeld University of Applied Sciences and Arts Interaktion 1 33619 Bielefeld Germany
| | - Michael Westphal
- Faculty of Physics, Bielefeld University Universitätsstraße 25 33615 Bielefeld Germany
| | - René Haverkamp
- Faculty of Chemistry, Physical and Biophysical Chemistry, Bielefeld University Universitätsstraße 25 33615 Bielefeld Germany
| | - Bennet Brockhagen
- Faculty of Engineering and Mathematics, Bielefeld University of Applied Sciences and Arts Interaktion 1 33619 Bielefeld Germany
| | - Jan Biedinger
- Faculty of Physics, Bielefeld University Universitätsstraße 25 33615 Bielefeld Germany
| | - Laila Bondzio
- Faculty of Physics, Bielefeld University Universitätsstraße 25 33615 Bielefeld Germany
| | - Christian Weinberger
- Department of Chemistry, Paderborn University Warburger Straße 100 33098 Paderborn Germany
| | - Dominik Baier
- Department of Chemistry, Paderborn University Warburger Straße 100 33098 Paderborn Germany
| | - Michael Tiemann
- Department of Chemistry, Paderborn University Warburger Straße 100 33098 Paderborn Germany
| | - Andreas Hütten
- Faculty of Physics, Bielefeld University Universitätsstraße 25 33615 Bielefeld Germany
| | - Thomas Hellweg
- Faculty of Chemistry, Physical and Biophysical Chemistry, Bielefeld University Universitätsstraße 25 33615 Bielefeld Germany
| | - Günter Reiss
- Faculty of Physics, Bielefeld University Universitätsstraße 25 33615 Bielefeld Germany
| | - Claudia Schmidt
- Department of Chemistry, Paderborn University Warburger Straße 100 33098 Paderborn Germany
| | - Klaus Sattler
- Department of Physics and Astronomy, University of Hawaii Watanabe Hall, 2505 Correa Road Honolulu HI 96822 USA
| | - Natalie Frese
- Faculty of Physics, Bielefeld University Universitätsstraße 25 33615 Bielefeld Germany
- Department of Physics and Astronomy, University of Hawaii Watanabe Hall, 2505 Correa Road Honolulu HI 96822 USA
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4
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Stolzke T, Krieg F, Peng T, Zhang H, Häusler O, Brandenbusch C. Hydroxylpropyl-β-cyclodextrin as Potential Excipient to Prevent Stress-Induced Aggregation in Liquid Protein Formulations. Molecules 2022; 27:molecules27165094. [PMID: 36014329 PMCID: PMC9414600 DOI: 10.3390/molecules27165094] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Revised: 07/30/2022] [Accepted: 08/03/2022] [Indexed: 11/22/2022] Open
Abstract
Due to the growing demand for patient-friendly subcutaneous dosage forms, the ability to increasing protein solubility and stability in formulations to deliver on the required high protein concentrations is crucial. A common approach to ensure protein solubility and stability in high concentration protein formulations is the addition of excipients such as sugars, amino acids, surfactants, approved by the Food and Drug Administration. In a best-case scenario, these excipients fulfil multiple demands simultaneously, such as increasing long-term stability of the formulation, reducing protein adsorption on surfaces/interfaces, and stabilizing the protein against thermal or mechanical stress. 2-Hydroxylpropyl-β-cyclodextrin (derivative of β-cyclodextrin) holds this potential, but has not yet been sufficiently investigated for use in protein formulations. Within this work, we have systematically investigated the relevant molecular interactions to identify the potential of Kleptose®HPB (2-hydroxylpropyl-β-cyclodextrin from Roquette Freres, Lestrem, France) as “multirole” excipient within liquid protein formulations. Based on our results three factors determine the influence of Kleptose®HPB on protein formulation stability: (1) concentration of Kleptose®HPB, (2) protein type and protein concentration, and (3) quality of the protein formulation. Our results not only contribute to the understanding of the relevant interactions but also enable the target-oriented use of Kleptose®HPB within formulation design.
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Affiliation(s)
- Tanja Stolzke
- Laboratory of Thermodynamics, Department of Biochemical and Chemical Engineering, TU Dortmund University, 44227 Dortmund, Germany
| | - Franziska Krieg
- Laboratory of Thermodynamics, Department of Biochemical and Chemical Engineering, TU Dortmund University, 44227 Dortmund, Germany
| | - Tao Peng
- Roquette Asia Pacific Pte. Ltd., Singapore 138588, Singapore
| | - Hailong Zhang
- Roquette Asia Pacific Pte. Ltd., Singapore 138588, Singapore
| | | | - Christoph Brandenbusch
- Laboratory of Thermodynamics, Department of Biochemical and Chemical Engineering, TU Dortmund University, 44227 Dortmund, Germany
- Correspondence:
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5
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Stolzke T, Brandenbusch C. Simplified choice of suitable excipients within biologics formulation design using protein-protein interaction- and water activity-maps. Eur J Pharm Biopharm 2022; 176:153-167. [DOI: 10.1016/j.ejpb.2022.05.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 05/16/2022] [Accepted: 05/23/2022] [Indexed: 01/17/2023]
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6
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Han Z, Wang P, Lu Y, Jia Z, Qu S, Yang W. A versatile hydrogel network-repairing strategy achieved by the covalent-like hydrogen bond interaction. SCIENCE ADVANCES 2022; 8:eabl5066. [PMID: 35196089 PMCID: PMC8865770 DOI: 10.1126/sciadv.abl5066] [Citation(s) in RCA: 52] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Hydrogen bond engineering is widely exploited to impart stretchability, toughness, and self-healing capability to hydrogels. However, the enhancement effect of conventional hydrogen bonds is severely limited by their weak interaction strength. In nature, some organisms tolerate extreme conditions due to the strong hydrogen bond interactions induced by trehalose. Here, we report a trehalose network-repairing strategy achieved by the covalent-like hydrogen bonding interactions to improve the hydrogels' mechanical properties while simultaneously enabling them to tolerate extreme environmental conditions and retain synthetic simplicity, which proves to be useful for various kinds of hydrogels. The mechanical properties of trehalose-modified hydrogels including strength, stretchability, and fracture toughness are substantially enhanced under a wide range of temperatures. After dehydration, the modified hydrogels maintain their hyperelasticity and functions, while the unmodified hydrogels collapse. This strategy provides a versatile methodology for synthesizing extremotolerant, highly stretchable, and tough hydrogels, which expand their potential applications to various conditions.
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Affiliation(s)
| | - Peng Wang
- Corresponding author. (P.W.); (S.Q.)
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7
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Katyal N, Sharma S, Deep S. Delving into controversial dichotomy of direct and indirect mechanisms of Trehalose: In search of unanimous consensus. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116656] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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8
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Arsiccio A, Ganguly P, La Cortiglia L, Shea JE, Pisano R. ADD Force Field for Sugars and Polyols: Predicting the Additivity of Protein-Osmolyte Interaction. J Phys Chem B 2020; 124:7779-7790. [PMID: 32790371 PMCID: PMC7901642 DOI: 10.1021/acs.jpcb.0c05345] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
Abstract
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The protein–osmolyte interaction has been shown experimentally to follow an
additive construct, where the individual osmolyte–backbone and
osmolyte–side-chain interactions contribute to the overall conformational
stability of proteins. Here, we computationally reconstruct this additive relation using
molecular dynamics simulations, focusing on sugars and polyols, including sucrose and
sorbitol, as model osmolytes. A new set of parameters (ADD) is developed for this
purpose, using the individual Kirkwood–Buff integrals for sugar–backbone
and sugar–side-chain interactions as target experimental data. We show that the
ADD parameters can reproduce the additivity of protein–sugar interactions and
correctly predict sucrose and sorbitol self-association and their interaction with
water. The accurate description of the separate osmolyte–backbone and
osmolyte–side-chain contributions also automatically translates into a good
prediction of preferential exclusion from the surface of ribonuclease A and
α-chymotrypsinogen A. The description of sugar polarity is improved compared to
previous force fields, resulting in closer agreement with the experimental data and
better compatibility with charged groups, such as the guanidinium moiety. The ADD
parameters are developed in combination with the CHARMM36m force field for proteins, but
good compatibility is also observed with the AMBER 99SB-ILDN and the OPLS-AA force
fields. Overall, exploiting the additivity of protein–osmolyte interactions is a
promising approach for the development of new force fields.
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Affiliation(s)
- Andrea Arsiccio
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, California 93106, United States
| | - Pritam Ganguly
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, California 93106, United States
| | - Lorenzo La Cortiglia
- Department of Applied Science and Technology, Politecnico di Torino, 24 Corso Duca Degli Abruzzi, Torino 10129, Italy
| | - Joan-Emma Shea
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, California 93106, United States.,Department of Physics, University of California, Santa Barbara, Santa Barbara, California 93106, United States
| | - Roberto Pisano
- Department of Applied Science and Technology, Politecnico di Torino, 24 Corso Duca Degli Abruzzi, Torino 10129, Italy
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9
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Wang G, Chen P, Yu X, Xia Y, Yan LT, Ai L. C18:1 Improves the Freeze-Drying Resistance of Lactobacillus plantarum by Maintaining the Cell Membrane. ACS APPLIED BIO MATERIALS 2020; 3:4933-4940. [PMID: 35021737 DOI: 10.1021/acsabm.0c00444] [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] [Indexed: 01/08/2023]
Abstract
Increasing knowledge about lactic acid bacteria as fermentation starters and probiotics to improve health has led to a growing awareness of their application potential. Despite a long history of applying cryoprotectants, the maintenance of probiotic viability is still a major challenge. In this study, we implemented a strategy and explored its mechanisms in detail. We found that the survival rates after freeze-drying were positively correlated with the relative concentration of the octadecenoic acid (C18:1) and with the ratio of unsaturated to saturated FAs (U/S ratio). The addition of C18:1 significantly improved the survival of L. plantarum after freeze-drying. Contrary to the most commonly used cryoprotectants, the addition of C18:1 did not affect the glass transition temperature or collapse temperature. We predicted that the cell membrane characteristics would be significantly degraded during the drying stage, but C18:1 can effectively maintain the cell membrane integrity and fluidity. Our experiments confirmed those predictions, and simultaneously found that the enzyme activities of key enzymes of glucose metabolism were increased compared with the control group. These finding indicate that C18:1 might serve as a lyoprotectant to maintain the cell membrane integrity and fluidity, and thereby increasing the survival rate of L. plantarum after freeze-drying. This study constitutes a strategy to safeguard bacterial viability.
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Affiliation(s)
- Guangqiang Wang
- Shanghai Engineering Research Center of Food Microbiology, School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Pengyu Chen
- Key Laboratory of Advanced Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
| | - Xiaoqing Yu
- Shanghai Engineering Research Center of Food Microbiology, School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Yongjun Xia
- Shanghai Engineering Research Center of Food Microbiology, School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Li-Tang Yan
- Key Laboratory of Advanced Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
| | - Lianzhong Ai
- Shanghai Engineering Research Center of Food Microbiology, School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
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10
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Nambiar D, Sharma O, Duff MR, Howell EE. Effects of Osmolytes on Ligand Binding to Dihydropteroate Synthase from Bacillus anthracis. J Phys Chem B 2020; 124:6212-6224. [PMID: 32580556 DOI: 10.1021/acs.jpcb.0c03311] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Osmolyte interactions with ligands can affect their affinity for proteins and are dependent upon the cosolute and the functional groups of the ligand. Here, we explored ligand binding to Bacillus anthracis dihydropteroate synthase (BaDHPS) under osmotic stress conditions. Osmolyte effects were specific to the cosolute and ligand, suggesting interaction of the osmolytes with the free ligands in solution. The association rates of pterin pyrophosphate were mostly unaffected by the osmolytes, except for a 2-fold decrease in the presence of 1 M trehalose, while the dissociation rates decreased in most osmolyte solutions. The viscosity and dielectric constant of the solution did not correlate with the effects of the osmolytes. Experimental results were compared with predicted preferential interaction coefficients (Δμ23/RT) between the osmolytes and ligands. The Δμ23/RT were able to predict the experimental data for most of the osmolytes. Trehalose and proline effects did not correlate with the predicted values, indicating that these two osmolytes may affect binding in more complex ways than simple preferential interactions. Additionally, osmolytes weakly interacted with the sulfa drug sulfathiazole, which altered its affinity for BaDHPS, suggesting that these types of weak interactions can also impact drug binding. As osmolytes affect ligands binding to two different folate cycle enzymes (DHFRs and DHPS), we predicted how ligand binding to other folate cycle enzymes will be altered by the presence of osmolytes.
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Affiliation(s)
- Deepika Nambiar
- Department of Biochemistry & Cellular and Molecular Biology Department, University of Tennessee-Knoxville, Knoxville, Tennessee 37996, United States
| | - Ojaswini Sharma
- Department of Biochemistry & Cellular and Molecular Biology Department, University of Tennessee-Knoxville, Knoxville, Tennessee 37996, United States
| | - Michael R Duff
- Department of Biochemistry & Cellular and Molecular Biology Department, University of Tennessee-Knoxville, Knoxville, Tennessee 37996, United States
| | - Elizabeth E Howell
- Department of Biochemistry & Cellular and Molecular Biology Department, University of Tennessee-Knoxville, Knoxville, Tennessee 37996, United States
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11
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Olgenblum GI, Sapir L, Harries D. Properties of Aqueous Trehalose Mixtures: Glass Transition and Hydrogen Bonding. J Chem Theory Comput 2020; 16:1249-1262. [PMID: 31917927 PMCID: PMC7467637 DOI: 10.1021/acs.jctc.9b01071] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Trehalose is a naturally occurring disaccharide known to remarkably stabilize biomacromolecules in the biologically active state. The stabilizing effect is typically observed over a large concentration range and affects many macromolecules including proteins, lipids, and DNA. Of special interest is the transition from aqueous solution to the dense and highly concentrated glassy state of trehalose that has been implicated in bioadaptation of different organisms toward desiccation stress. Although several mechanisms have been suggested to link the structure of the low water content glass with its action as an exceptional stabilizer, studies are ongoing to resolve which are most pertinent. Specifically, the role that hydrogen bonding plays in the formation of the glass is not well resolved. Here we model aqueous trehalose mixtures over a wide concentration range, using molecular dynamics simulations with two available force fields. Both force fields indicate glass transition temperatures and osmotic pressures that are close to experimental values, particularly at high trehalose contents. We develop and employ a methodology that allows us to analyze the thermodynamics of hydrogen bonds in simulations at different water contents and temperatures. Remarkably, this analysis is able to link the liquid to glass transition with changes in hydrogen bond characteristics. Most notably, the onset of the glassy state can be quantitatively related to the transition from weakly to strongly correlated hydrogen bonds. Our findings should help resolve the properties of the glass and the mechanisms of its formation in the presence of added macromolecules.
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Affiliation(s)
- Gil I Olgenblum
- Institute of Chemistry, the Fritz Haber Research Center, and the Harvey M. Kruger Center for Nanoscience & Nanotechnology , The Hebrew University , Jerusalem 9190401 , Israel
| | - Liel Sapir
- Department of Mechanical Engineering and Materials Science , Duke University , Durham , North Carolina 27708 , United States
| | - Daniel Harries
- Institute of Chemistry, the Fritz Haber Research Center, and the Harvey M. Kruger Center for Nanoscience & Nanotechnology , The Hebrew University , Jerusalem 9190401 , Israel
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12
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Shumilin I, Allolio C, Harries D. How Sugars Modify Caffeine Self-Association and Solubility: Resolving a Mechanism of Selective Hydrotropy. J Am Chem Soc 2019; 141:18056-18063. [DOI: 10.1021/jacs.9b07056] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Ilan Shumilin
- Institute of Chemistry, The Fritz Haber Research Center, and The Harvey M. Krueger Family Center for Nanoscience and Nanotechnology, Edmond J. Safra Campus, The Hebrew University, Jerusalem 9190401, Israel
| | - Christoph Allolio
- Institute of Chemistry, The Fritz Haber Research Center, and The Harvey M. Krueger Family Center for Nanoscience and Nanotechnology, Edmond J. Safra Campus, The Hebrew University, Jerusalem 9190401, Israel
| | - Daniel Harries
- Institute of Chemistry, The Fritz Haber Research Center, and The Harvey M. Krueger Family Center for Nanoscience and Nanotechnology, Edmond J. Safra Campus, The Hebrew University, Jerusalem 9190401, Israel
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13
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Loftsson T, Saokham P, Sá Couto AR. Self-association of cyclodextrins and cyclodextrin complexes in aqueous solutions. Int J Pharm 2019; 560:228-234. [PMID: 30771468 DOI: 10.1016/j.ijpharm.2019.02.004] [Citation(s) in RCA: 68] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Revised: 02/07/2019] [Accepted: 02/09/2019] [Indexed: 12/23/2022]
Abstract
Cyclodextrins (CDs) are oligosaccharides that self-assemble in aqueous solutions to form transient clusters, nanoparticles and small microparticles. The critical aggregation concentration (cac) of the natural αCD, βCD and γCD in pure aqueous solutions was estimated to be 25, 8 and 9 mg/ml, respectively. The cac of 2-hydroxypropyl-β-cyclodextrin (HPβCD), that consists of mixture of isomers, was estimated to be significantly higher or 118 mg/ml. Addition of chaotropic agents (i.e. that disrupts non-covalent bonds such as hydrogen bonds) to the aqueous media increases the cac. Formation of drug/CD complexes can increase or decrease the cac. Due to the transient nature of the CD clusters and nanoparticles they can be difficult to detect and their presence is frequently ignored. However, they have profound effect on the physiochemical properties of CDs and their pharmaceutical applications. For example, the values of stability constants of drug/CD complexes can be both concentration dependent and method dependent. Like in the case of micelles water-soluble polymers can enhance the solubilizing effect of CDs. Also, formation of drug/CD complex nanoparticles appears to increase the ability of CDs to enhance drug delivery through some mucosal membranes.
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Affiliation(s)
- Thorsteinn Loftsson
- Faculty of Pharmaceutical Sciences, University of Iceland, Hofsvallagata 53, IS-107 Reykjavík, Iceland.
| | - Phennapha Saokham
- College of Pharmacy, Rangsit University, Pathum Thani 12000, Thailand.
| | - André Rodrigues Sá Couto
- Faculty of Pharmaceutical Sciences, University of Iceland, Hofsvallagata 53, IS-107 Reykjavík, Iceland.
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14
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Abb S, Tarrat N, Cortés J, Andriyevsky B, Harnau L, Schön JC, Rauschenbach S, Kern K. Polymorphism in carbohydrate self-assembly at surfaces: STM imaging and theoretical modelling of trehalose on Cu(100). RSC Adv 2019; 9:35813-35819. [PMID: 35528101 PMCID: PMC9074738 DOI: 10.1039/c9ra06764g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Accepted: 10/24/2019] [Indexed: 01/08/2023] Open
Abstract
Saccharides, also commonly known as carbohydrates, are ubiquitous biomolecules, but little is known about their interaction with surfaces. Soft-landing electrospray ion beam deposition in conjunction with high-resolution imaging by scanning tunneling microscopy now provides access to the molecular details of the surface assembly of this important class of bio-molecules. Among carbohydrates, the disaccharide trehalose is outstanding as it enables strong anhydrobiotic effects in biosystems. This ability is closely related to the observed polymorphism. In this work, we explore the self-assembly of trehalose on the Cu(100) surface. Molecular imaging reveals the details of the assembly properties in this reduced symmetry environment. Already at room temperature, we observe a variety of self-assembled motifs, in contrast to other disaccharides like e.g. sucrose. Using a multistage modeling approach, we rationalize the conformation of trehalose on the copper surface as well as the intermolecular interactions and the self-assembly behavior. We rationalize the experimentally observed variety of trehalose assemblies on Cu(100) by modeling based on STM images and global optimization.![]()
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Affiliation(s)
- Sabine Abb
- Max Planck Institute for Solid State Research
- 70569 Stuttgart
- Germany
| | | | - Juan Cortés
- LAAS-CNRS, Université de Toulouse
- CNRS
- Toulouse
- France
| | | | | | | | - Stephan Rauschenbach
- Max Planck Institute for Solid State Research
- 70569 Stuttgart
- Germany
- Department of Chemistry
- University of Oxford
| | - Klaus Kern
- Max Planck Institute for Solid State Research
- 70569 Stuttgart
- Germany
- Institut de Physique
- Ecole Polytechnique Fédérale de Lausanne
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15
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Jamali SH, Westen TV, Moultos OA, Vlugt TJH. Optimizing Nonbonded Interactions of the OPLS Force Field for Aqueous Solutions of Carbohydrates: How to Capture Both Thermodynamics and Dynamics. J Chem Theory Comput 2018; 14:6690-6700. [PMID: 30407814 PMCID: PMC6293444 DOI: 10.1021/acs.jctc.8b00909] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
![]()
Knowledge on thermodynamic and transport
properties of aqueous
solutions of carbohydrates is of great interest for process and product
design in the food, pharmaceutical, and biotechnological industries.
Molecular simulation is a powerful tool to calculate these properties,
but current classical force fields cannot provide accurate estimates
for all properties of interest. The poor performance of the force
fields is mainly observed for concentrated solutions, where solute–solute
interactions are overestimated. In this study, we propose a method
to refine force fields, such that solute–solute interactions
are more accurately described. The OPLS force field combined with
the SPC/Fw water model is used as a basis. We scale the nonbonded
interaction parameters of sucrose, a disaccharide. The scaling factors
are chosen in such a way that experimental thermodynamic and transport
properties of aqueous solutions of sucrose are accurately reproduced.
Using a scaling factor of 0.8 for Lennard-Jones energy parameters
(ϵ) and a scaling factor of 0.95 for partial atomic charges
(q), we find excellent agreement between experiments
and computed liquid densities, thermodynamic factors, shear viscosities,
self-diffusion coefficients, and Fick (mutual) diffusion coefficients.
The transferability of these optimum scaling factors to other carbohydrates
is verified by computing thermodynamic and transport properties of
aqueous solutions of d-glucose, a monosaccharide. The good
agreement between computed properties and experiments suggests that
the scaled interaction parameters are transferable to other carbohydrates,
especially for concentrated solutions.
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Affiliation(s)
- Seyed Hossein Jamali
- Engineering Thermodynamics, Process & Energy Department, Faculty of Mechanical, Maritime and Materials Engineering , Delft University of Technology , Leeghwaterstraat 39 , 2628CB Delft , The Netherlands
| | - Thijs van Westen
- Institute AMOLF , Science Park 104 , 1098XG , Amsterdam , The Netherlands.,Institute of Thermodynamics and Thermal Process Engineering , University of Stuttgart , Pfaffenwaldring 9 , D-70569 Stuttgart , Germany
| | - Othonas A Moultos
- Engineering Thermodynamics, Process & Energy Department, Faculty of Mechanical, Maritime and Materials Engineering , Delft University of Technology , Leeghwaterstraat 39 , 2628CB Delft , The Netherlands
| | - Thijs J H Vlugt
- Engineering Thermodynamics, Process & Energy Department, Faculty of Mechanical, Maritime and Materials Engineering , Delft University of Technology , Leeghwaterstraat 39 , 2628CB Delft , The Netherlands
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16
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Al-Ayoubi SR, Schinkel PKF, Berghaus M, Herzog M, Winter R. Combined effects of osmotic and hydrostatic pressure on multilamellar lipid membranes in the presence of PEG and trehalose. SOFT MATTER 2018; 14:8792-8802. [PMID: 30339170 DOI: 10.1039/c8sm01343h] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We studied the interaction of lipid membranes with the disaccharide trehalose (TRH), which is known to stabilize biomembranes against various environmental stress factors. Generally, stress factors include low/high temperature, shear, osmotic and hydrostatic pressure. Small-angle X-ray-scattering was applied in combination with fluorescence spectroscopy and calorimetric measurements to get insights into the influence of trehalose on the supramolecular structure, hydration level, and elastic and thermodynamic properties as well as phase behavior of the model biomembrane DMPC, covering a large region of the temperature, osmotic and hydrostatic pressure phase space. We observed distinct effects of trehalose on the topology of the lipid's supramolecular structure. Trehalose, unlike osmotic pressure induced by polyethylene glycol, leads to a decrease of lamellar order and a swelling of multilamellar vesicles, which is attributable to direct interactions between the membrane and trehalose. Our results revealed a distinct biphasic concentration dependence of the observed effects of trehalose. While trehalose intercalates between the polar head groups at low concentrations, the effects after saturation are dominated by the exclusion of trehalose from the membrane surface.
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Affiliation(s)
- Samy R Al-Ayoubi
- Physical Chemistry I - Biophysical Chemistry, Faculty of Chemistry and Chemical Biology, TU Dortmund University, Otto-Hahn-Str. 4a, 44227 Dortmund, Germany.
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17
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Cloutier T, Sudrik C, Sathish HA, Trout BL. Kirkwood–Buff-Derived Alcohol Parameters for Aqueous Carbohydrates and Their Application to Preferential Interaction Coefficient Calculations of Proteins. J Phys Chem B 2018; 122:9350-9360. [DOI: 10.1021/acs.jpcb.8b07623] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Theresa Cloutier
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Chaitanya Sudrik
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Hasige A. Sathish
- Formulation Sciences, MedImmune LLC, Gaithersburg, Maryland 20878, United States
| | - Bernhardt L. Trout
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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18
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Abstract
Trehalose, commonly found in living organisms, is believed to help them survive severe environmental conditions, such as drought or extreme temperatures. With the aim of trying to understand these properties, two recent neutron scattering studies investigate the structure of trehalose water solutions but come to seemingly opposite conclusions. In the first study, which looks at two concentrations of trehalose-water mole ratios of 1:100 and 1:25, the conclusion is that trehalose hydrogen-bonds to water rather weakly and has a relatively minor impact on the structure of water in solution compared to bulk water. On the other hand, for the other, using a mole ratio of 1:38, the conclusion is that the water structure is rather substantially modified by the presence of trehalose and that the hydrogen bonding between water and trehalose hydroxyl groups is significant. In an attempt to try to understand the origin of these divergent views, which arise from similar but independent analyses of different neutron diffraction data, we have performed additional X-ray scattering experiments, which are highly sensitive to water structure, at the same trehalose-water concentrations used in the first study, and combined these with empirical potential structure refinement on the previously collected neutron data. The new analysis unequivocally confirms that trehalose does indeed have only a minor impact on the structure of water, at all three concentrations, and forms relatively weak hydrogen bonds with water. Far from being discrepant with the existing literature, our new analysis of the different datasets suggests a natural explanation for the increased glass-transition temperature of trehalose compared to other sugars and hence its enhanced effectiveness as a protectant against drought stress.
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Affiliation(s)
- Alan K Soper
- ISIS Facility, STFC Rutherford Appleton Laboratory , Harwell Campus , Didcot OX11 0QX , U.K
| | - Maria Antonietta Ricci
- Dipartimento di Scienze , Università degli Studi "Roma Tre" , via della Vasca Navale 84 , 00146 Roma , Italy
| | - Fabio Bruni
- Dipartimento di Scienze , Università degli Studi "Roma Tre" , via della Vasca Navale 84 , 00146 Roma , Italy
| | - Natasha H Rhys
- Department of Biochemistry , University of Oxford , South Parks Road , Oxford OX1 3QU , U.K
| | - Sylvia E McLain
- Department of Biochemistry , University of Oxford , South Parks Road , Oxford OX1 3QU , U.K
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19
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Katyal N, Agarwal M, Sen R, Kumar V, Deep S. Paradoxical Effect of Trehalose on the Aggregation of α-Synuclein: Expedites Onset of Aggregation yet Reduces Fibril Load. ACS Chem Neurosci 2018; 9:1477-1491. [PMID: 29601727 DOI: 10.1021/acschemneuro.8b00056] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Aggregation of α-synuclein is closely connected to the pathology of Parkinson's disease. The phenomenon involves multiple steps, commenced by partial misfolding and eventually leading to mature amyloid fibril formation. Trehalose, a widely accepted osmolyte, has been shown previously to inhibit aggregation of various globular proteins owing to its ability to prevent the initial unfolding of protein. In this study, we have examined if it behaves in a similar fashion with intrinsically disordered protein α-synuclein and possesses the potential to act as therapeutic agent against Parkinson's disease. It was observed experimentally that samples coincubated with trehalose fibrillate faster compared to the case in its absence. Molecular dynamics simulations suggested that this initial acceleration is manifestation of trehalose's tendency to perturb the conformational transitions between different conformers of monomeric protein. It stabilizes the aggregation prone "extended" conformer of α-synuclein, by binding to its exposed acidic residues of the C terminus. It also favors the β-rich oligomers once formed. Interestingly, the total fibrils formed are still promisingly less since it accelerates the competing pathway toward formation of amorphous aggregates.
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Affiliation(s)
- Nidhi Katyal
- Department of Chemistry, Indian Institute of Technology, Delhi, Hauz-Khas, New Delhi 110016, India
| | - Manish Agarwal
- Department of Chemistry, Indian Institute of Technology, Delhi, Hauz-Khas, New Delhi 110016, India
| | - Raktim Sen
- Department of Chemistry, Indian Institute of Technology, Delhi, Hauz-Khas, New Delhi 110016, India
| | - Vinay Kumar
- Department of Chemistry, Indian Institute of Technology, Delhi, Hauz-Khas, New Delhi 110016, India
| | - Shashank Deep
- Department of Chemistry, Indian Institute of Technology, Delhi, Hauz-Khas, New Delhi 110016, India
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20
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Choi JH, Lee H, Choi HR, Cho M. Graph Theory and Ion and Molecular Aggregation in Aqueous Solutions. Annu Rev Phys Chem 2018; 69:125-149. [DOI: 10.1146/annurev-physchem-050317-020915] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jun-Ho Choi
- Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science, Seoul 02841, Republic of Korea
- Department of Chemistry, Korea University, Seoul 02841, Republic of Korea
- Current affiliation: Department of Chemistry, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of Korea
| | - Hochan Lee
- Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science, Seoul 02841, Republic of Korea
- Department of Chemistry, Korea University, Seoul 02841, Republic of Korea
| | - Hyung Ran Choi
- Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science, Seoul 02841, Republic of Korea
- Department of Chemistry, Korea University, Seoul 02841, Republic of Korea
| | - Minhaeng Cho
- Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science, Seoul 02841, Republic of Korea
- Department of Chemistry, Korea University, Seoul 02841, Republic of Korea
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21
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Katyal N, Deep S. Inhibition of GNNQQNY prion peptide aggregation by trehalose: a mechanistic view. Phys Chem Chem Phys 2018; 19:19120-19138. [PMID: 28702592 DOI: 10.1039/c7cp02912h] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Deposition of amyloid fibrils is the seminal event in the pathogenesis of numerous neurodegenerative diseases. The formation of this amyloid assembly is the manifestation of a cascade of structural transitions including toxic oligomer formation in the early stages of aggregation. Thus a viable therapeutic strategy involves the use of small molecular ligands to interfere with this assembly. In this perspective, we have explored the kinetics of aggregate formation of the fibril forming GNNQQNY peptide fragment from the yeast prion protein SUP35 using multiple all atom MD simulations with explicit solvent and provided mechanistic insights into the way trehalose, an experimentally known aggregation inhibitor, modulates the aggregation pathway. The results suggest that the assimilation process is impeded by different barriers at smaller and larger oligomeric sizes: the initial one being easily surpassed at higher temperatures and peptide concentrations. The kinetic profile demonstrates that trehalose delays the aggregation process by increasing both these activation barriers, specifically the latter one. It increases the sampling of small-sized aggregates that lack the beta sheet conformation. Analysis reveals that the barrier in the growth of larger stable oligomers causes the formation of multiple stable small oligomers which then fuse together bimolecularly. The PCA of 26 properties was carried out to deconvolute the events within the temporary lag phases, which suggested dynamism in lags involving an increase in interchain contacts and burial of SASA. The predominant growth route is monomer addition, which changes to condensation on account of a large number of depolymerisation events in the presence of trehalose. The favourable interaction of trehalose specifically with the sidechain of the peptide promotes crowding of trehalose molecules in its vicinity - the combination of both these factors imparts the observed behaviour. Furthermore, increasing trehalose concentration leads to faster expulsion of water molecules than interpeptide interactions. These expelled water molecules have larger translational movement, suggesting an entropy factor to favor the assembly process. Different conformations observed under this condition suggest the role of water molecules in guiding the morphology of the aggregates as well. A similar scenario exists on increasing peptide concentration.
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Affiliation(s)
- Nidhi Katyal
- Department of Chemistry, Indian Institute of Technology, Delhi, Hauzkhas, New Delhi, India.
| | - Shashank Deep
- Department of Chemistry, Indian Institute of Technology, Delhi, Hauzkhas, New Delhi, India.
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22
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Singh SK. Sucrose and Trehalose in Therapeutic Protein Formulations. CHALLENGES IN PROTEIN PRODUCT DEVELOPMENT 2018. [DOI: 10.1007/978-3-319-90603-4_3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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23
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Bobek J, Šmídová K, Čihák M. A Waking Review: Old and Novel Insights into the Spore Germination in Streptomyces. Front Microbiol 2017; 8:2205. [PMID: 29180988 PMCID: PMC5693915 DOI: 10.3389/fmicb.2017.02205] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Accepted: 10/26/2017] [Indexed: 01/02/2023] Open
Abstract
The complex development undergone by Streptomyces encompasses transitions from vegetative mycelial forms to reproductive aerial hyphae that differentiate into chains of single-celled spores. Whereas their mycelial life – connected with spore formation and antibiotic production – is deeply investigated, spore germination as the counterpoint in their life cycle has received much less attention. Still, germination represents a system of transformation from metabolic zero point to a new living lap. There are several aspects of germination that may attract our attention: (1) Dormant spores are strikingly well-prepared for the future metabolic restart; they possess stable transcriptome, hydrolytic enzymes, chaperones, and other required macromolecules stabilized in a trehalose milieu; (2) Germination itself is a specific sequence of events leading to a complete morphological remodeling that include spore swelling, cell wall reconstruction, and eventually germ tube emergences; (3) Still not fully unveiled are the strategies that enable the process, including a single cell’s signal transduction and gene expression control, as well as intercellular communication and the probability of germination across the whole population. This review summarizes our current knowledge about the germination process in Streptomyces, while focusing on the aforementioned points.
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Affiliation(s)
- Jan Bobek
- Institute of Immunology and Microbiology, First Faculty of Medicine, Charles University, Prague, Czechia.,Chemistry Department, Faculty of Science, Jan Evangelista Purkyně University in Ústí nad Labem, Ústí nad Labem, Czechia.,Institute of Microbiology of the Czech Academy of Sciences, Prague, Czechia
| | - Klára Šmídová
- Institute of Immunology and Microbiology, First Faculty of Medicine, Charles University, Prague, Czechia.,Institute of Microbiology of the Czech Academy of Sciences, Prague, Czechia
| | - Matouš Čihák
- Institute of Immunology and Microbiology, First Faculty of Medicine, Charles University, Prague, Czechia
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24
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Poplinger M, Shumilin I, Harries D. Impact of trehalose on the activity of sodium and potassium chloride in aqueous solutions: Why trehalose is worth its salt. Food Chem 2017; 237:1209-1215. [PMID: 28763971 DOI: 10.1016/j.foodchem.2017.06.047] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Revised: 06/02/2017] [Accepted: 06/07/2017] [Indexed: 10/19/2022]
Abstract
Trehalose is revered for its multiple unique impacts on solution properties, including the ability to modulate the salty and bitter tastes of sodium and potassium salts. However, the molecular mechanisms underlying trehalose's effect on taste perception are unknown. Here we focus on the physico-chemical effect of trehalose to alter the activity of monovalent salts in aqueous solution. Using a modified isopiestic methodology that relies on contemporary vapor pressure osmometry, we elucidate how trehalose modifies the thermodynamic chemical activity of sodium and potassium chloride, as well as the effect of the salts on the sugar's activity. We find that trehalose has a specific impact on potassium chloride that is unlike that of other sugars or polyols. Remarkably, especially at low salt concentrations, trehalose considerably elevates the activity (or chemical potential) of KCl, raising the salt activity coefficient as high as ∼1.5 its value in the absence of the sugar. Moreover, in contrast to their action on other known carbohydrates, both KCl and NaCl act as salting-out agents towards trehalose, as seen in the elevated activity coefficient compared with its value in pure water (up to ∼1.5 higher at low sugar and salt concentrations). We discuss the possible relevance of our findings to the mechanism of trehalose taste perception modification, and point to necessary future directed sensory experiments needed to resolve the possible link between our findings and the emerging biochemical or physiological mechanisms involved.
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Affiliation(s)
- Michal Poplinger
- Institute of Chemistry and The Fritz Haber Research Center, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Ilan Shumilin
- Institute of Chemistry and The Fritz Haber Research Center, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Daniel Harries
- Institute of Chemistry and The Fritz Haber Research Center, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.
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25
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Sapir L, Harries D. Revisiting Hydrogen Bond Thermodynamics in Molecular Simulations. J Chem Theory Comput 2017; 13:2851-2857. [DOI: 10.1021/acs.jctc.7b00238] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Liel Sapir
- Institute of Chemistry and The Fritz Haber
Research Center, The Hebrew University, Jerusalem 91904, Israel
| | - Daniel Harries
- Institute of Chemistry and The Fritz Haber
Research Center, The Hebrew University, Jerusalem 91904, Israel
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26
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Olsson C, Jansson H, Youngs T, Swenson J. Structure of Aqueous Trehalose Solution by Neutron Diffraction and Structural Modeling. J Phys Chem B 2016; 120:12669-12678. [DOI: 10.1021/acs.jpcb.6b10556] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | - Tristan Youngs
- ISIS
Pulsed Neutron and Muon Source, STFC Rutherford Appleton Laboratory, Harwell Campus, Oxon, OX11 0QX, Oxfordshire, U.K
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27
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Schultz-Jensen N, Aamand J, Sørensen SR. Bioaugmentation potential of free and formulated 2,6-dichlorobenzamide (BAM) degrading Aminobacter sp. MSH1 in soil, sand and water. AMB Express 2016; 6:33. [PMID: 27130267 PMCID: PMC4851666 DOI: 10.1186/s13568-016-0204-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Accepted: 04/20/2016] [Indexed: 11/10/2022] Open
Abstract
Pesticides are used extensively worldwide, which has led to the unwanted contamination of soil and water resources. Former use of the herbicide 2,6-dichlorobenzonitrile (dichlobenil) has caused pollution of ground and surface water resources by the stable degradation product 2,6-dichlorobenzamide (BAM) in several parts of Europe, which has resulted in the costly closure of several drinking water wells. One strategy for preventing this in future is bioaugmentation using bacterial degraders. BAM-degrading Aminobacter sp. MSH1 was therefore formulated into dried beads and tests undertaken to establish their potential for use in the remediation of polluted soil, sand and water. The formulation procedure included freeze drying, combined with trehalose addition for cell wall protection, thus ensuring a high amount of viable cells following prolonged storage at room temperature. The beads were round-shaped pellets with a diameter of about 1.25 mm, a dry matter content of approximately 95 % and an average viable cell content of 4.4 × 10(9) cells/g bead. Formulated MSH1 cells led to a similar, and frequently even faster, BAM mineralisation (20-65 % (14)CO2 produced from (14)C-labelled BAM) in batch tests conducted with sand, water and different soil moisture contents compared to adding free cells. Furthermore, the beads were easy to handle and had a shelf life of several months.
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28
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Meirzadeh E, Sapir L, Cohen H, Cohen SR, Ehre D, Harries D, Lahav M, Lubomirsky I. Nonclassical Crystal Growth as Explanation for the Riddle of Polarity in Centrosymmetric Glycine Crystals. J Am Chem Soc 2016; 138:14756-14763. [DOI: 10.1021/jacs.6b09190] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
| | - Liel Sapir
- Institute
of Chemistry and The Fritz Haber Research Center, The Hebrew University, Jerusalem 91904, Israel
| | | | | | | | - Daniel Harries
- Institute
of Chemistry and The Fritz Haber Research Center, The Hebrew University, Jerusalem 91904, Israel
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29
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Indra S, Biswas R. How Heterogeneous Are Trehalose/Glycerol Cryoprotectant Mixtures? A Combined Time-Resolved Fluorescence and Computer Simulation Investigation. J Phys Chem B 2016; 120:11214-11228. [PMID: 27723334 DOI: 10.1021/acs.jpcb.6b06511] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Heterogeneity and molecular motions in representative cryoprotectant mixtures made of trehalose and glycerol are investigated in the temperature range 298 ≤ T (K) ≤ 353, via time-resolved fluorescence Stokes shift and anisotropy measurements, and molecular dynamics simulations of four-point density-time correlations and H-bond relaxations. Mixtures containing 5 and 20 wt % of trehalose along with neat glycerol are studied. Viscosity coefficients for these systems lie in the range 0.30 < η (P) < 23. Measured solute (Coumarin 153) rotation and solvation times reveal a substantial departure from the hydrodynamic viscosity dependence, suggesting the strong microheterogeneous nature of these systems. Fluorescence anisotropy decays are highly nonexponential, reflecting a non-Markovian character of the medium friction. A complete missing of the Stokes shift dynamics in these systems at 298 K but partial detection of it at other higher temperatures (shift magnitude being ∼400-600 cm-1) indicates rigid solute environments. An amorphous solid-like feature emerges in the simulated radial distribution functions at these temperatures. Analyses of mean squared displacements reveal rattling-in-a-cage motion, non-Gaussian displacement distributions, and strong dynamic heterogeneity features. Simulated dynamic structure factors and four-point correlations hint, respectively, at very long α-relaxation and correlated time scales at 298 K. This explains the long solute rotation times (∼80-200 ns) measured at 298 K. Stretched exponential decay of the simulated H-bond relaxations with long time scales further highlights the strong temporal heterogeneity and slow dynamics inherent to these systems. In summary, this work provides the first insight into the molecular motions and interspecies interaction in a representative cryoprotectant mixture, and stimulates further study to investigate the interconnection between cryoprotection and dynamic heterogeneity.
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Affiliation(s)
- Sandipa Indra
- Department of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences , Block-JD, Salt Lake, Sector-III, Kolkata 700106, India
| | - Ranjit Biswas
- Department of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences , Block-JD, Salt Lake, Sector-III, Kolkata 700106, India
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30
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Ryzhakov A, Do Thi T, Stappaerts J, Bertoletti L, Kimpe K, Sá Couto AR, Saokham P, Van den Mooter G, Augustijns P, Somsen GW, Kurkov S, Inghelbrecht S, Arien A, Jimidar MI, Schrijnemakers K, Loftsson T. Self-Assembly of Cyclodextrins and Their Complexes in Aqueous Solutions. J Pharm Sci 2016; 105:2556-2569. [DOI: 10.1016/j.xphs.2016.01.019] [Citation(s) in RCA: 85] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Revised: 01/19/2016] [Accepted: 01/21/2016] [Indexed: 12/12/2022]
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Co-lyophilized Aspirin with Trehalose Causes Less Injury to Human Gastric Cells and Gastric Mucosa of Rats. Dig Dis Sci 2016; 61:2242-2251. [PMID: 27245341 DOI: 10.1007/s10620-016-4209-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2015] [Accepted: 05/20/2016] [Indexed: 02/02/2023]
Abstract
BACKGROUND Aspirin is one of the most popular NSAIDs worldwide because of its anti-inflammatory and anticoagulant effects, and however, gastrointestinal injury remains a major complication. We previously reported co-lyophilized aspirin/trehalose (Lyo A/T) decreased the aspirin-induced gastric lesions in dogs. AIM This study investigated the mechanism of gastroprotective effects of trehalose in vitro and in vivo. METHODS The apoptotic assays were performed in a human gastric carcinoma cell line, which was treated with aspirin, mixed aspirin/trehalose (Mix A/T) or Lyo A/T. Gastric ulcer severity was examined after oral administration of drugs in rats. In addition, the mucosal tissue apoptotic status in drug-treated rats was evaluated. Molecular dynamics simulations and laser Raman spectroscopy were performed in order to examine the molecular properties of Lyo A/T. RESULTS DNA fragmentation was detected in AGS cells that were treated with aspirin and Mix A/T, but not in the Lyo A/T-treated cells. There were fewer apoptotic cells in the Lyo A/T-treated cells than in the other cells. Gastric injury was reduced in rats that received oral Lyo A/T compared with the others, while PGE2 synthesis was equally decreased in all groups. TUNEL assay and immunohistochemistry of cleaved caspase-3 in the mucosal tissues also revealed that Lyo A/T treatment induced less apoptosis than the others. The Lyo A/T spectrum showed clear differences in several Raman bands compared with that of Mix A/T. CONCLUSIONS Our data showed that co-lyophilization of aspirin with trehalose reduced gastric injury, potentially through suppression of aspirin-induced mucosal cell apoptosis while retaining its anti-inflammatory effects.
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Is Trehalose an Effective Quenching Agent of Azotobacter vinelandii Mo-Nitrogenase Turnover? Inorganica Chim Acta 2016; 453:74-77. [PMID: 31662586 DOI: 10.1016/j.ica.2016.07.039] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
H2-evolution assays, plus EPR and FTIR spectroscopies, using CO-inhibited Azotobacter vinelandii Mo-nitrogenase have shown that the disaccharide trehalose is an effective quenching agent of enzymatic turnover and also stabilizes the reaction intermediates formed. Complete inhibition of H2-evolution activity was achieved at 1.5 M trehalose, which compares favorably to the requirement for 10 M ethylene glycol to achieve similar inhibition. Reaction-intermediate stabilization was demonstrated by monitoring the EPR spectrum of the 'hi-CO' form of CO-inhibited N2ase, which did not change during 1 hr after trehalose quenching. Similarly, in situ photolysis with FTIR monitoring of 'hi-CO' resulted in the same 1973 and 1681 cm-1 signals as observed previously in ethylene glycol-quenched systems. [a] These results clearly show that 1.5 M trehalose is an effective quench and stabilization agent for Mo-N2ase studies. Possible applications are discussed.
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Lee H, Choi JH, Verma PK, Cho M. Computational Vibrational Spectroscopy of HDO in Osmolyte–Water Solutions. J Phys Chem A 2016; 120:5874-86. [DOI: 10.1021/acs.jpca.6b06305] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Hochan Lee
- Center for Molecular Spectroscopy and Dynamics, Institute for Basic
Science and ‡Department of Chemistry, Korea University, Seoul 02841, Republic of Korea
| | - Jun-Ho Choi
- Center for Molecular Spectroscopy and Dynamics, Institute for Basic
Science and ‡Department of Chemistry, Korea University, Seoul 02841, Republic of Korea
| | - Pramod Kumar Verma
- Center for Molecular Spectroscopy and Dynamics, Institute for Basic
Science and ‡Department of Chemistry, Korea University, Seoul 02841, Republic of Korea
| | - Minhaeng Cho
- Center for Molecular Spectroscopy and Dynamics, Institute for Basic
Science and ‡Department of Chemistry, Korea University, Seoul 02841, Republic of Korea
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34
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Mahjoubi N, Fazeli MR, Dinarvand R, Khoshayand MR, Fazeli A, Taghavian M, Rastegar H. Preventing Aggregation of Recombinant Interferon beta-1b in Solution by Additives: Approach to an Albumin-Free Formulation. Adv Pharm Bull 2015; 5:497-505. [PMID: 26819922 DOI: 10.15171/apb.2015.068] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2015] [Revised: 07/04/2015] [Accepted: 07/30/2015] [Indexed: 01/16/2023] Open
Abstract
PURPOSE Aggregation suppressing additives have been used to stabilize proteins during manufacturing and storage. Interferonβ-1b is prone to aggregation because of being non-glycosylated. Aggregation behavior of albumin-free formulations of recombinant IFNβ-1b was explored using additives such as n-dodecyl-β-D-maltoside, Tween 20, arginine, glycine, trehalose and sucrose at different pH. METHODS Fractional factorial design was applied to select major factors affecting aggregation in solutions. Box-Behnken technique was used to optimize the best concentration of additives and protein. RESULTS Quadratic model was the best fitted model for particle size, OD350 and OD280/OD260. The optimal conditions of 0.2% n-Dodecyl-β-D-maltoside, 70 mM arginine, 189 mM trehalose and protein concentration of 0.50 mg/ml at pH 4 were achieved. A potency value of 91% ± 5% was obtained for the optimized formulation. CONCLUSION This study shows that the combination of n-Dodecyl-β-D-maltoside, arginine and trehalose would demonstrate a significant stabilizing and anti-aggregating effect on the liquid formulation of interferonβ-1b. It can not only reduce the manufacturing costs but will also ease patient compliance.
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Affiliation(s)
- Najmeh Mahjoubi
- Department of Drug and Food Control, Pharmaceutical Sciences Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Reza Fazeli
- Department of Drug and Food Control, Pharmaceutical Sciences Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Rassoul Dinarvand
- Department of Pharmaceutics, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Reza Khoshayand
- Department of Drug and Food Control, Pharmaceutical Sciences Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Ahmad Fazeli
- Research and Development Department, Zistdaru Danesh Company. Tehran, Iran
| | - Mohammad Taghavian
- Department of Drug and Food Control, Pharmaceutical Sciences Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Hossein Rastegar
- Food and Drug Research Center, Food and Drug Organization, MOH&ME, Tehran, Iran
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35
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Paul S, Paul S. Influence of temperature on the solvation of N-methylacetamide in aqueous trehalose solution: A molecular dynamics simulation study. J Mol Liq 2015. [DOI: 10.1016/j.molliq.2015.08.024] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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36
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Lee H, Choi JH, Verma PK, Cho M. Spectral Graph Analyses of Water Hydrogen-Bonding Network and Osmolyte Aggregate Structures in Osmolyte-Water Solutions. J Phys Chem B 2015; 119:14402-12. [PMID: 26473387 DOI: 10.1021/acs.jpcb.5b08029] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Recently, it was shown that the spectral graph theory is exceptionally useful for understanding not only morphological structural differences in ion aggregates but also similarities between an ion network and a water H-bonding network in highly concentrated salt solutions. Here, we present spectral graph analysis results on osmolyte aggregates and water H-bonding network structures in aqueous renal osmolyte solutions. The quantitative analyses of the adjacency matrices that are graph-theoretical representations of aggregates of osmolyte molecules and water H-bond structures provide the ensemble average eigenvalue spectra and degree distribution. We show that urea molecules form quite different morphological structures compared to other protecting renal osmolyte molecules in water, particularly sorbitol and trimethylglycine, which are well-known protecting osmolytes, and at high concentrations exhibit a strong propensity to form morphological structures that are graph-theoretically similar to that of the water H-bond network. Conversely, urea molecules, even at similarly high concentrations, form separated clusters instead of extended osmolyte-osmolyte networks. This difference in morphological structure of osmolyte-osmolyte aggregates between protecting and destabilizing osmolytes is considered to be an important observation that led us to propose a hypothesis on the osmolyte aggregate growth mechanism via either osmolyte network formation or segregated osmolyte cluster formation. We anticipate that the present spectral graph analyses of osmolyte aggregate structures and their interplay with the water H-bond network structure in highly concentrated renal osmolyte solutions could provide important information on the osmolyte effects of not only water structures but also protein stability in biologically relevant osmolyte solutions.
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Affiliation(s)
- Hochan Lee
- Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science (IBS) , Seoul 136-701, Republic of Korea.,Department of Chemistry, Korea University , Seoul 136-713, Republic of Korea
| | - Jun-Ho Choi
- Department of Chemistry, Korea University , Seoul 136-713, Republic of Korea
| | - Pramod Kumar Verma
- Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science (IBS) , Seoul 136-701, Republic of Korea.,Department of Chemistry, Korea University , Seoul 136-713, Republic of Korea
| | - Minhaeng Cho
- Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science (IBS) , Seoul 136-701, Republic of Korea.,Department of Chemistry, Korea University , Seoul 136-713, Republic of Korea
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37
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Abstract
Protein aggregation and loss of protein's biological functionality are manifestations of protein instability. Cosolvents, in particular trehalose, are widely accepted antidotes against such destabilization. Although numerous theories have been promulgated in the literature with regard to its mechanism of stabilization, the present scenario is still elusive in view of the discrepancies existing in them. To this end, we have revisited the conundrum and attempted to rationalize the mechanism by conducting thorough investigation of the effect of trehalose on the native, partially unfolded and denatured states of protein "Lysozyme" by means of molecular dynamic (MD) simulations under different temperature and concentration regimes. Two-dimensional contour plots along with principal component analysis suggest that trehalose molecules offer on-pathway stabilization unaltering the principal direction of protein's motion, although it slows down protein dynamics so that the protein gets trapped in the homogeneous ensemble of conformations closer to the native state. Free energy landscape reveals higher population of native compared to intermediate and denatured states. Delphi results and calculation of the preferential interaction parameter demonstrate that this relative stabilization of the native state can be ascribed to be the consequence of favourable interactions of trehalose with side chains of certain loci on the protein surface encompassing polar flexible residues. Stability of protein results from the observed difference in binding affinity of trehalose for native and denatured states of protein. Our findings are at variance with the common conception of relative destabilization of the denatured state. Rather, we provide evidence for relative stabilization of the native state. This stabilization is due to interplay of protein-trehalose, water-trehalose, water-water, protein-water and trehalose-trehalose interactions.
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Affiliation(s)
- Nidhi Katyal
- Department of Chemistry, Indian Institute of Technology, Delhi, Hauzkhas, New Delhi, 110016, India.
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38
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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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39
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Paul S, Paul S. Exploring the Counteracting Mechanism of Trehalose on Urea Conferred Protein Denaturation: A Molecular Dynamics Simulation Study. J Phys Chem B 2015; 119:9820-34. [DOI: 10.1021/acs.jpcb.5b01576] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Subrata Paul
- Department of Chemistry, Indian Institute of Technology, Guwahati, Assam, India-781039
| | - Sandip Paul
- Department of Chemistry, Indian Institute of Technology, Guwahati, Assam, India-781039
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40
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Valente AJM, Carvalho RA, Söderman O. Do Cyclodextrins Aggregate in Water? Insights from NMR Experiments. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:6314-6320. [PMID: 26017565 DOI: 10.1021/acs.langmuir.5b01493] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
One decade ago Bonini et al. [Langmuir 2006, 22, 1478-1484] reported the occurrence of aggregates of β-cyclodextrin in aqueous solutions with sizes in the range from 90 nm to a few micrometers. The experimental technique used was cryo-TEM. This work followed a number of previous studies involving other physical parameters, such as viscosities and activity coefficients, the results of which were interpreted in terms of self-aggregation of cyclodextrins. Since then, the ability of cyclodextrins to self-assemble were often used to explain and rationalize the supramolecular mechanisms involving cyclodextrins. Here, the question of aggregation of native cyclodextrins (α-, β-, and γ-) in aqueous solutions is addressed by using (1)H NMR techniques, including NMR diffusometry, relaxometry, and proton peak intensities. Within the detection limit of the NMR experiments, no aggregates of cyclodextrin were observed. If aggregates are present, the fraction of cyclodextrin in aggregates is quite small-less than 1%. However, we cannot exclude the presence of transient clusters involving several cyclodextrin molecules where the lifetime of the cluster is short.
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Affiliation(s)
| | | | - Olle Söderman
- §Division of Physical Chemistry, Department of Chemistry, Lund University, PO Box 124, S-221 00 Lund, Sweden
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41
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Nooney RI, White A, O'Mahony C, O'Connell C, Kelleher SM, Daniels S, McDonagh C. Investigating the colloidal stability of fluorescent silica nanoparticles under isotonic conditions for biomedical applications. J Colloid Interface Sci 2015; 456:50-8. [PMID: 26092116 DOI: 10.1016/j.jcis.2015.05.051] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2015] [Revised: 05/26/2015] [Accepted: 05/27/2015] [Indexed: 12/12/2022]
Abstract
Fluorescent silica nanoparticle (NP) labels are of great interest in biomedical diagnostics, however, when used in bioassays under physiological conditions they rapidly agglomerate and precipitate from solution leading to high levels of non-specific binding. In this work, using size and zeta-potential data obtained from Dynamic and Electrophoretic Light Scattering analysis, the improvement in colloidal stability of silica NPs under physiological conditions was correlated with an increase in the concentration of three additives: (1) a protein, bovine serum albumin (BSA); (2) a neutral surfactant, Tween 20®; and (3) a charged surfactant, sodium dodecyl sulfate (SDS). The number of BSA molecules present in the NP corona at each concentration was calculated using UV-Vis spectroscopy and a bicinchoninic acid protein assay (BCA). The optimal concentration of each additive was also effective in stabilizing antibody labeled fluorescent nanoparticles (αNPs) under physiological conditions. Using a fourth additive, trehalose, the colloidal stability of αNPs after freeze-drying and long-term storage also significantly improved. Both as-prepared and freeze-dried αNPs were tested in a standard fluorescence immunoassay for the detection of human IgG. The as-prepared assay showed a higher sensitivity at low concentration and a lower limit of detection when compared to a free dye assay. Assays performed with freeze dried αNPs after 4 and 22 days also showed good reproducibility.
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Affiliation(s)
- Robert I Nooney
- Biomedical Diagnostic Institute, National Centre for Sensor Research, School of Physical Sciences, Dublin City University, Collins Avenue, Glasnevin, Dublin 9, Ireland.
| | - Angela White
- Biomedical Diagnostic Institute, National Centre for Sensor Research, School of Physical Sciences, Dublin City University, Collins Avenue, Glasnevin, Dublin 9, Ireland.
| | - Christy O'Mahony
- Georgia Institute of Technology, School of Chemistry and Biochemistry, Atlanta, GA 30332-0400, USA.
| | - Claire O'Connell
- Biomedical Diagnostic Institute, National Centre for Sensor Research, School of Physical Sciences, Dublin City University, Collins Avenue, Glasnevin, Dublin 9, Ireland.
| | - Susan M Kelleher
- Biomedical Diagnostic Institute, National Centre for Sensor Research, School of Physical Sciences, Dublin City University, Collins Avenue, Glasnevin, Dublin 9, Ireland.
| | - Stephen Daniels
- Biomedical Diagnostic Institute, National Centre for Sensor Research, School of Physical Sciences, Dublin City University, Collins Avenue, Glasnevin, Dublin 9, Ireland.
| | - Colette McDonagh
- Biomedical Diagnostic Institute, National Centre for Sensor Research, School of Physical Sciences, Dublin City University, Collins Avenue, Glasnevin, Dublin 9, Ireland.
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42
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Sapir L, Harries D. Macromolecular Stabilization by Excluded Cosolutes: Mean Field Theory of Crowded Solutions. J Chem Theory Comput 2015; 11:3478-90. [DOI: 10.1021/acs.jctc.5b00258] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Liel Sapir
- Institute of Chemistry and
The Fritz Haber Research Center, The Hebrew University, Jerusalem 91904, Israel
| | - Daniel Harries
- Institute of Chemistry and
The Fritz Haber Research Center, The Hebrew University, Jerusalem 91904, Israel
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43
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Weng L, Elliott GD. Dynamic and thermodynamic characteristics associated with the glass transition of amorphous trehalose-water mixtures. Phys Chem Chem Phys 2015; 16:11555-65. [PMID: 24803351 DOI: 10.1039/c3cp55418j] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The glass transition temperature Tg of biopreservative formulations is important for predicting the long-term storage of biological specimens. As a complementary tool to thermal analysis techniques, which are the mainstay for determining Tg, molecular dynamics simulations have been successfully applied to predict the Tg of several protectants and their mixtures with water. These molecular analyses, however, rarely focused on the glass transition behavior of aqueous trehalose solutions, a subject that has attracted wide scientific attention via experimental approaches. Important behavior, such as hydrogen-bonding dynamics and self-aggregation has yet to be explored in detail, particularly below, or in the vicinity of, Tg. Using molecular dynamics simulations of several dynamic and thermodynamic properties, this study reproduced the supplemented phase diagram of trehalose-water mixtures (i.e., Tg as a function of the solution composition) based on experimental data. The structure and dynamics of the hydrogen-bonding network in the trehalose-water systems were also analyzed. The hydrogen-bonding lifetime was determined to be an order of magnitude higher in the glassy state than in the liquid state, while the constitution of the hydrogen-bonding network exhibited no noticeable change through the glass transition. It was also found that trehalose molecules preferred to form small, scattered clusters above Tg, but self-aggregation was substantially increased below Tg. The average cluster size in the glassy state was observed to be dependent on the trehalose concentration. Our findings provided insights into the glass transition characteristics of aqueous trehalose solutions as they relate to biopreservation.
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Affiliation(s)
- Lindong Weng
- Department of Mechanical Engineering and Engineering Sciences, University of North Carolina at Charlotte, Charlotte, NC 28223, U.S.A.
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44
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Sapir L, Harries D. Is the depletion force entropic? Molecular crowding beyond steric interactions. Curr Opin Colloid Interface Sci 2015. [DOI: 10.1016/j.cocis.2014.12.003] [Citation(s) in RCA: 86] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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45
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Paul S, Paul S. Molecular Insights into the Role of Aqueous Trehalose Solution on Temperature-Induced Protein Denaturation. J Phys Chem B 2015; 119:1598-610. [DOI: 10.1021/jp510423n] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Subrata Paul
- Department
of Chemistry, Indian Institute of Technology, Guwahati, Assam India-781039
| | - Sandip Paul
- Department
of Chemistry, Indian Institute of Technology, Guwahati, Assam India-781039
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46
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Halle B. Reply to "Comment on 'Hydration and mobility of trehalose in aqueous solution'". J Phys Chem B 2014; 118:10806-12. [PMID: 25171500 DOI: 10.1021/jp5083467] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Bertil Halle
- Department of Biophysical Chemistry, Lund University , SE-22100 Lund, Sweden
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47
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Paul S, Paul S. Effects of the temperature and trehalose concentration on the hydrophobic interactions of a small nonpolar neopentane solute: a molecular dynamics simulation study. RSC Adv 2014. [DOI: 10.1039/c4ra03678f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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48
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Sajadi M, Berndt F, Richter C, Gerecke M, Mahrwald R, Ernsting NP. Observing the Hydration Layer of Trehalose with a Linked Molecular Terahertz Probe. J Phys Chem Lett 2014; 5:1845-1849. [PMID: 26273863 DOI: 10.1021/jz500437c] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The terahertz (THz) absorption bands of biomolecular hydration layers are generally swamped by absorption from bulk water. Using the disaccharide trehalose, we show that this limitation can be overcome by attaching a molecular probe. By time-resolving the fluorescence shift of the probe, a local THz spectrum is obtained. From the dependence on temperature and H2O/D2O exchange, it is concluded that the trehalose hydration layer is being observed. The region of dynamic water perturbation by the disaccharide encompasses the probe and is therefore larger than the first two solvation layers.
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Affiliation(s)
- Mohsen Sajadi
- Department of Chemistry, Humboldt Universität zu Berlin, Brook-Taylor-Strasse 2, D-12489 Berlin, Germany
| | - Falko Berndt
- Department of Chemistry, Humboldt Universität zu Berlin, Brook-Taylor-Strasse 2, D-12489 Berlin, Germany
| | - Celin Richter
- Department of Chemistry, Humboldt Universität zu Berlin, Brook-Taylor-Strasse 2, D-12489 Berlin, Germany
| | - Mario Gerecke
- Department of Chemistry, Humboldt Universität zu Berlin, Brook-Taylor-Strasse 2, D-12489 Berlin, Germany
| | - Rainer Mahrwald
- Department of Chemistry, Humboldt Universität zu Berlin, Brook-Taylor-Strasse 2, D-12489 Berlin, Germany
| | - Nikolaus P Ernsting
- Department of Chemistry, Humboldt Universität zu Berlin, Brook-Taylor-Strasse 2, D-12489 Berlin, Germany
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49
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Corezzi S, Sassi P, Paolantoni M, Comez L, Morresi A, Fioretto D. Hydration and rotational diffusion of levoglucosan in aqueous solutions. J Chem Phys 2014; 140:184505. [DOI: 10.1063/1.4873575] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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50
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Paul S, Paul S. Trehalose Induced Modifications in the Solvation Pattern of N-Methylacetamide. J Phys Chem B 2014; 118:1052-63. [DOI: 10.1021/jp407782x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Subrata Paul
- Department
of Chemistry, Indian Institute of Technology, Guwahati, Assam, India-781039
| | - Sandip Paul
- Department
of Chemistry, Indian Institute of Technology, Guwahati, Assam, India-781039
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