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Physico-chemical properties of aqueous drug solutions: From the basic thermodynamics to the advanced experimental and simulation results. Int J Pharm 2018; 540:65-77. [PMID: 29412151 DOI: 10.1016/j.ijpharm.2018.01.042] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Revised: 01/22/2018] [Accepted: 01/22/2018] [Indexed: 11/20/2022]
Abstract
The physical chemical properties of aqueous solutions of model compounds are illustrated in relation to hydration and solubility issues by using three perspectives: thermodynamic, spectroscopic and molecular dynamics simulations. The thermodynamic survey of the fundamental backgrounds of concentration dependence and experimental solubility results show some peculiar behavior of aqueous solutions with several types of similar solutes. Secondly, the use of a variety of experimental spectroscopic devices, operating under different experimental conditions of dimension and frequency, has produced a large amount of structural and dynamic data on aqueous solutions showing the richness of the information produced, depending on where and how the experiment is carried out. Finally, the use of molecular dynamics computational work is presented to highlight how the different types of solute functional groups and surface topologies organize adjacent water molecules differently. The highly valuable contribution of computer simulation studies in providing molecular explanations for experimental deductions, either of a thermodynamic or spectroscopic nature, is shown to have changed the current knowledge of many aqueous solution processes. While this paper is intended to provide a collective view on the latest literature results, still the presentation aims at a tutorial explanation of the potentials of the three methodologies in the field of aqueous solutions of pharmaceutical molecules.
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Shen Y, Wu T, Jiang B, Deng G, Li J, Chen H, Guo X, Ge C, Chen Y, Hong J, Yang X, Yuan K, Zhuang W, Zheng J. Comparison Studies on Sub-Nanometer-Sized Ion Clusters in Aqueous Solutions: Vibrational Energy Transfers, MD Simulations, and Neutron Scattering. J Phys Chem B 2015; 119:9893-904. [DOI: 10.1021/acs.jpcb.5b04530] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yuneng Shen
- State
Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of the Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 Liaoning, China
- University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Tianmin Wu
- Department
of Chemical Physics, University of Science and Technology of China, Hefei 230026, China
| | - Bo Jiang
- State
Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of the Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 Liaoning, China
| | - Ganghua Deng
- State
Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of the Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 Liaoning, China
| | - Jiebo Li
- Department
of Chemistry, Rice University, Houston, Texas 77005, United States
| | - Hailong Chen
- Department
of Chemistry, Rice University, Houston, Texas 77005, United States
| | - Xunmin Guo
- Department
of Chemistry, Rice University, Houston, Texas 77005, United States
| | - Chuanqi Ge
- State
Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of the Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 Liaoning, China
- School
of Physics and Electronic Technology, Liaoning Normal University, Dalian 116029, China
| | - Yajing Chen
- State
Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of the Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 Liaoning, China
| | - Jieya Hong
- State
Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of the Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 Liaoning, China
| | - Xueming Yang
- State
Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of the Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 Liaoning, China
| | - Kaijun Yuan
- State
Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of the Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 Liaoning, China
| | - Wei Zhuang
- State
Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of the Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 Liaoning, China
| | - Junrong Zheng
- Department
of Chemistry, Rice University, Houston, Texas 77005, United States
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Mason PE, Neilson GW, Price DL, Saboungi ML, Brady JW. A new structural technique for examining ion-neutral association in aqueous solution. Faraday Discuss 2013; 160:161-70; discussion 207-24. [DOI: 10.1039/c2fd20081c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Shvab I, Sadus RJ. Dielectric and structural properties of aqueous nonpolar solute mixtures. J Chem Phys 2012; 137:124501. [DOI: 10.1063/1.4753940] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Pham VT, Penfold TJ, van der Veen RM, Lima F, El Nahhas A, Johnson SL, Beaud P, Abela R, Bressler C, Tavernelli I, Milne CJ, Chergui M. Probing the Transition from Hydrophilic to Hydrophobic Solvation with Atomic Scale Resolution. J Am Chem Soc 2011; 133:12740-8. [DOI: 10.1021/ja203882y] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Van-Thai Pham
- Ecole Polytechnique Fédérale de Lausanne, Laboratoire de Spectroscopie Ultrarapide, ISIC-FSB, Station 6, CH-1015 Lausanne, Switzerland
| | - Thomas J. Penfold
- Ecole Polytechnique Fédérale de Lausanne, Laboratoire de Spectroscopie Ultrarapide, ISIC-FSB, Station 6, CH-1015 Lausanne, Switzerland
- Swiss Light Source, Paul-Scherrer-Institut, CH-5232 PSI-Villigen, Switzerland
- Ecole Polytechnique Fédérale de Lausanne, Laboratoire de Chimie Et Biochimie Computationnelles, ISIC-FSB, CH-1015 Lausanne, Switzerland
| | - Renske M. van der Veen
- Ecole Polytechnique Fédérale de Lausanne, Laboratoire de Spectroscopie Ultrarapide, ISIC-FSB, Station 6, CH-1015 Lausanne, Switzerland
- Swiss Light Source, Paul-Scherrer-Institut, CH-5232 PSI-Villigen, Switzerland
| | - Frederico Lima
- Ecole Polytechnique Fédérale de Lausanne, Laboratoire de Spectroscopie Ultrarapide, ISIC-FSB, Station 6, CH-1015 Lausanne, Switzerland
| | - Amal El Nahhas
- Ecole Polytechnique Fédérale de Lausanne, Laboratoire de Spectroscopie Ultrarapide, ISIC-FSB, Station 6, CH-1015 Lausanne, Switzerland
| | - Steve L. Johnson
- Swiss Light Source, Paul-Scherrer-Institut, CH-5232 PSI-Villigen, Switzerland
| | - Paul Beaud
- Swiss Light Source, Paul-Scherrer-Institut, CH-5232 PSI-Villigen, Switzerland
| | - Rafael Abela
- Swiss Light Source, Paul-Scherrer-Institut, CH-5232 PSI-Villigen, Switzerland
| | - Christian Bressler
- Ecole Polytechnique Fédérale de Lausanne, Laboratoire de Spectroscopie Ultrarapide, ISIC-FSB, Station 6, CH-1015 Lausanne, Switzerland
| | - Ivano Tavernelli
- Ecole Polytechnique Fédérale de Lausanne, Laboratoire de Chimie Et Biochimie Computationnelles, ISIC-FSB, CH-1015 Lausanne, Switzerland
| | - Christopher J. Milne
- Ecole Polytechnique Fédérale de Lausanne, Laboratoire de Spectroscopie Ultrarapide, ISIC-FSB, Station 6, CH-1015 Lausanne, Switzerland
| | - Majed Chergui
- Ecole Polytechnique Fédérale de Lausanne, Laboratoire de Spectroscopie Ultrarapide, ISIC-FSB, Station 6, CH-1015 Lausanne, Switzerland
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Abstract
Modern biophysics has benefited greatly from the use of X-ray and neutron diffraction from ordered single crystals of proteins and other macromolecules to give highly detailed pictures of these molecules in the solid state. However, the most biologically relevant environments for these molecules are liquid solutions, and their liquid state properties are sensitive to details of the liquid structuring. The best experimental method for studying such structuring is also neutron diffraction, but of course, the inherent disorder of the liquid state means that these experiments cannot hope to achieve the level of informational detail available from single crystal diffraction. Nonetheless, recent advances in neutron beam intensity, beam stability, and detector sensitivity mean that it should be possible, at least in principle, to use such measurements to extract information about structuring in much more complex systems than have previously been studied. We describe a series of neutron diffraction studies of isotopically labeled molecules in aqueous solution which, when combined with results from computer simulations, can be used to extract conformational information of the hydration of the molecules themselves, essentially opening up new avenues of investigation in structural biology.
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Mason PE, Neilson GW, Dempsey CE, Price DL, Saboungi ML, Brady JW. Observation of pyridine aggregation in aqueous solution using neutron scattering experiments and MD simulations. J Phys Chem B 2010; 114:5412-9. [PMID: 20369858 DOI: 10.1021/jp9097827] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Neutron diffraction with isotopic substitution (NDIS) experiments have been used to examine the structuring of aqueous solutions of pyridine. A new method is described for extracting the structure factors relating to intermolecular correlations from neutron scattering experiments on liquid solutions of complex molecular species. This approach performs experiments at different concentrations and exploits the intramolecular coordination number concentration invariance (ICNCI) to separate the internal and intermolecular contributions to the total intensities. The ability of this method to deconvolute molecular and intermolecular correlations is tested and demonstrated using simulated neutron scattering results predicted from molecular dynamics simulations of aqueous solutions of the polyatomic solute pyridine in which the inter- and intramolecular terms are known. The method is then implemented using neutron scattering measurements on solutions of pyridine. The results confirm that pyridine shows a significant propensity to aggregate in solution and demonstrate the prospects for the future application of the ICNCI approach to the study of large polyatomic solutes using next-generation neutron sources and detectors.
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Affiliation(s)
- Philip E Mason
- Department of Food Science, Stocking Hall, Cornell University, Ithaca, New York 14853, USA
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Mason PE, Neilson GW, Enderby JE, Saboungi ML, Dempsey CE, MacKerell AD, Brady JW. The Structure of Aqueous Guanidinium Chloride Solutions. J Am Chem Soc 2004; 126:11462-70. [PMID: 15366892 DOI: 10.1021/ja040034x] [Citation(s) in RCA: 207] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The combination of neutron diffraction with isotopic substitution (NDIS) experiments and molecular dynamics (MD) simulations to characterize the structuring in an aqueous solution of the denaturant guanidinium chloride is described. The simulations and experiments were carried out at a concentration of 3 m at room temperature, allowing for an examination of any propensity for ion association in a realistic solution environment. The simulations satisfactorily reproduced the principal features of the neutron scattering and indicate a bimodal hydration of the guanidinium ions, with the N-H groups making well-ordered hydrogen bonds in the molecular plane, but with the planar faces relatively deficient in interactions with water. The most striking feature of these solutions is the rich ion-ion ordering observed around the guanidinium ion in the simulations. The marked tendency of the guanidinium ions to stack parallel to their water-deficient surfaces indicates that the efficiency of this ion as a denaturant is due to its ability to simultaneously interact favorably with both water and hydrophobic side chains of proteins.
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Affiliation(s)
- Philip E Mason
- Contribution from the Department of Food Science, Stocking Hall, Cornell University, Ithaca, NY 14853, USA
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10
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Ohmori T, Kimura Y. Translational diffusion of hydrophobic solutes in supercritical water studied by molecular dynamics simulations. J Chem Phys 2003. [DOI: 10.1063/1.1607953] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Botti A, Bruni F, Isopo A, Modesti G, Oliva C, Ricci MA, Senesi R, Soper AK. Water structure in supercritical mixtures of water and rare gases. J Chem Phys 2003. [DOI: 10.1063/1.1523916] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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12
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Abstract
This paper reviews the molecular theory of hydrophobic effects relevant to biomolecular structure and assembly in aqueous solution. Recent progress has resulted in simple, validated molecular statistical thermodynamic theories and clarification of confusing theories of decades ago. Current work is resolving effects of wider variations of thermodynamic state, e.g., pressure denaturation of soluble proteins, and more exotic questions such as effects of surface chemistry in treating stability of macromolecular structures in aqueous solution.
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Affiliation(s)
- Lawrence R Pratt
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
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