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Bayne ACV, Pessi J, Bird JK, Stemmler RT, Frerichs M, Besheer A. Vitamins as excipients in pharmaceutical products. Eur J Pharm Sci 2025; 206:107020. [PMID: 39826621 DOI: 10.1016/j.ejps.2025.107020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2024] [Revised: 01/13/2025] [Accepted: 01/15/2025] [Indexed: 01/22/2025]
Abstract
Excipients are ingredients in pharmaceutical products other than the active ingredient, added to facilitate manufacturing, enhance stability or modulate release and bioavailability. Vitamins are diverse molecules essential for human nutrition that also can fulfil excipient functions. This review focuses on vitamins used as excipients and provides an overview of the functions of vitamins in various pharmaceutical formulations. A thorough search was conducted to understand the current use of vitamins in marketed drug products, concluding that many vitamins are already used as functional excipients. Vitamins are used widely in different dosage forms, including oral, parenteral, and topical formulations, and alongside a broad range of active pharmaceutical ingredients, biologics, and small molecules from different biopharmaceutical classification system classes. Many examples of the use of vitamins to improve the performance of the pharmaceutical formulation in which they are included are presented and the mode of action of vitamins as excipients in the product is reviewed. Furthermore, the potential for future uses of vitamins in pharmaceutical products is highlighted. Lastly, considerations for the use of vitamins as excipients in drug products as well as the regulatory framework are discussed.
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Affiliation(s)
| | - Jenni Pessi
- dsm-firmenich, P.O. Box 2676, 4002, Basel, Switzerland.
| | - Julia K Bird
- Bird Scientific Writing, Wassenaar, 2242, the Netherlands.
| | | | | | - Ahmed Besheer
- dsm-firmenich, P.O. Box 2676, 4002, Basel, Switzerland.
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2
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Shimizu S, Matubayasi N. Temperature Dependence of Hydrotropy. J Phys Chem B 2024; 128:10915-10924. [PMID: 39466718 PMCID: PMC11552019 DOI: 10.1021/acs.jpcb.4c04619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2024] [Revised: 10/07/2024] [Accepted: 10/10/2024] [Indexed: 10/30/2024]
Abstract
The solubility of hydrophobic solutes increases dramatically with the temperature when hydrotropes are added to water. In this paper, the mechanism of this well-known observation will be explained via statistical thermodynamics through (i) enhanced enthalpy-hydrotrope number correlation locally (around the solute) that promotes the temperature dependence and (ii) hydrotrope self-association in the bulk solution that suppresses the temperature dependence. The contribution from (i), demonstrated to be dominant for urea as a hydrotrope, signifies the weakening of interaction energies around the solute (local) than in the bulk that accompanies incoming hydrotrope molecules. Thus, studying hydrotropic solubilization along the temperature and hydrotrope concentration provides complementary information on the local-bulk difference: the local accumulation of hydrotropes around the solute, driven by the enhanced local hydrotrope self-association, is also accompanied by the overall local weakening of energetic interactions, reflecting the fluctuational nature of hydrotrope association and the mediating role of water molecules.
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Affiliation(s)
- Seishi Shimizu
- York
Structural Biology Laboratory, Department of Chemistry, University of York, Heslington, York YO10 5DD, U.K.
| | - Nobuyuki Matubayasi
- Division
of Chemical Engineering, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
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3
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Shimizu S, Matubayasi N. Synergistic Solvation as the Enhancement of Local Mixing. J Phys Chem B 2024; 128:5713-5726. [PMID: 38829987 PMCID: PMC11182234 DOI: 10.1021/acs.jpcb.4c01582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2024] [Revised: 05/02/2024] [Accepted: 05/21/2024] [Indexed: 06/05/2024]
Abstract
Mixing two solvents can sometimes make a much better solvent than expected from their weighted mean. This phenomenon, called synergistic solvation, has commonly been explained via the Hildebrand and Hansen solubility parameters, yet their inability in other solubilization phenomena, most notably hydrotropy, necessitates an alternative route to elucidating solubilization. While, recently, the universal theory of solubilization was founded on the statistical thermodynamic fluctuation theory (as a generalization of the Kirkwood-Buff theory), its demand for experimental data processing has been a hindrance for its wider application. This can be overcome by the solubility isotherm theory, which is founded on the fluctuation theory yet reduces experimental data processing significantly to the level of isotherm analysis in sorption. The isotherm analysis identifies the driving force of synergistic solvation as the enhancement of solvent mixing around the solute, opposite in behavior to hydrotropy (characterized by the enhancement of demixing or self-association around the solute). Thus, the fluctuation theory, including its solubility isotherms, provides a universal language for solubilization across the historic subcategorization of solubilizers, for which different (and often contradictory) mechanistic models have been proposed.
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Affiliation(s)
- Seishi Shimizu
- York
Structural Biology Laboratory, Department of Chemistry, University of York, Heslington, York YO10 5DD, United Kingdom
| | - Nobuyuki Matubayasi
- Division
of Chemical Engineering, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
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4
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Khizar N, Abbas N, Ahmed M, Ahmad M, Mustafa Z, Jehangir M, Mohammed Al-Ahmary K, Hussain A, Bukhari NI, Ali I. Amelioration of tableting properties and dissolution rate of naproxen co-grinded with nicotinamide: preparation and characterization of co-grinded mixture. Drug Dev Ind Pharm 2024; 50:537-549. [PMID: 38771120 DOI: 10.1080/03639045.2024.2358356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2023] [Accepted: 05/17/2024] [Indexed: 05/22/2024]
Abstract
OBJECTIVE AND SIGNIFICANCE Reducing the dimensions, when other additives are present, shows potential as a method to improve the dissolution and solubility of biopharmaceutical classification system class II drugs that have poor solubility. In this investigation, the process involved grinding naproxen with nicotinamide with the aim of improving solubility and the rate of dissolution. METHODS Naproxen was subjected to co-milling with urea, dimethylurea, and nicotinamide using a planetary ball mill for a duration of 90 min, maintaining a 1:1 molar ratio for the excipients (screening studies). The co-milled combinations, naproxen in its pure milled form, and a physical mixture were subjected to analysis using X-ray powder diffraction (XRPD), scanning electron microscopy (SEM), and solubility assessment. The mixture displaying the highest solubility (naproxen-nicotinamide) was chosen for further investigation, involving testing for intrinsic dissolution rate (IDR) and Fourier-transform infrared spectroscopy (FTIR) after co-milling for both 90 and 480 min. RESULTS AND CONCLUSION The co-milled combination, denoted as S-3b and consisting of the most substantial ratio of nicotinamide to naproxen at 1:3, subjected to 480 min of milling, exhibited a remarkable 45-fold increase in solubility and a 9-fold increase in IDR. XRPD analysis of the co-milled samples demonstrated no amorphization, while SEM images portrayed the aggregates of naproxen with nicotinamide. FTIR outcomes negate the presence of any chemical interactions between the components. The co-milled sample exhibiting the highest solubility and IDR was used to create a tablet, which was then subjected to comprehensive evaluation for standard attributes. The results revealed improved compressibility and dissolution properties.
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Affiliation(s)
- Nosheen Khizar
- University College of Pharmacy, University of the Punjab, Lahore, Pakistan
| | - Nasir Abbas
- University College of Pharmacy, University of the Punjab, Lahore, Pakistan
| | - Mahmood Ahmed
- Department of Chemistry, Division of Science and Technology, University of Education, Lahore, Pakistan
| | - Muhammad Ahmad
- Department of Chemistry, Division of Science and Technology, University of Education, Lahore, Pakistan
| | - Zeeshan Mustafa
- Department of Physics, Lahore Garrison University, Lahore, Pakistan
| | - Muhammad Jehangir
- Department of Chemistry, FC College (A Chartered University), Lahore, Pakistan
| | | | - Amjad Hussain
- University College of Pharmacy, University of the Punjab, Lahore, Pakistan
| | | | - Ijaz Ali
- Centre for Applied Mathematics and Bioinformatics (CAMB), Gulf University for Science and Technology, Hawally, Kuwait
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5
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Fine-Shamir N, Dahan A. Solubility-enabling formulations for oral delivery of lipophilic drugs: considering the solubility-permeability interplay for accelerated formulation development. Expert Opin Drug Deliv 2024; 21:13-29. [PMID: 38124383 DOI: 10.1080/17425247.2023.2298247] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Accepted: 12/19/2023] [Indexed: 12/23/2023]
Abstract
INTRODUCTION Tackling low water solubility of drug candidates is a major challenge in today's pharmaceutics/biopharmaceutics, especially by means of modern solubility-enabling formulations. However, drug absorption from these formulations oftentimes remains unchanged or even decreases, despite substantial solubility enhancement. AREAS COVERED In this article, we overview the simultaneous effects of the formulation on the solubility and the apparent permeability of the drug, and analyze the contribution of this solubility-permeability interplay to the success/failure of the formulation to increase the overall absorption and bioavailability. Three different patterns of interplay were identified: (1) solubility-permeability tradeoff in which every solubility gain comes with a price of concomitant permeability loss; (2) an advantageous interplay pattern in which the permeability remains unchanged alongside the solubility gain; and (3) an optimal interplay pattern in which the formulation increases both the solubility and the permeability. Passive vs. active intestinal permeability considerations in the context of the solubility-permeability interplay are also thoroughly discussed. EXPERT OPINION The solubility-permeability interplay pattern of a given formulation has a critical effect on its overall success/failure, and hence, taking into account both parameters in solubility-enabling formulation development is prudent and highly recommended.
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Affiliation(s)
- Noa Fine-Shamir
- Department of Clinical Pharmacology, School of Pharmacy, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Arik Dahan
- Department of Clinical Pharmacology, School of Pharmacy, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
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Bhatt T, Dam B, Khedkar SU, Lall S, Pandey S, Kataria S, Ajnabi J, Gulzar SEJ, Dias PM, Waskar M, Raut J, Sundaramurthy V, Vemula PK, Ghatlia N, Majumdar A, Jamora C. Niacinamide enhances cathelicidin mediated SARS-CoV-2 membrane disruption. Front Immunol 2023; 14:1255478. [PMID: 38022563 PMCID: PMC10663372 DOI: 10.3389/fimmu.2023.1255478] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2023] [Accepted: 10/09/2023] [Indexed: 12/01/2023] Open
Abstract
The continual emergence of SARS-CoV-2 variants threatens to compromise the effectiveness of worldwide vaccination programs, and highlights the need for complementary strategies for a sustainable containment plan. An effective approach is to mobilize the body's own antimicrobial peptides (AMPs), to combat SARS-CoV-2 infection and propagation. We have found that human cathelicidin (LL37), an AMP found at epithelial barriers as well as in various bodily fluids, has the capacity to neutralise multiple strains of SARS-CoV-2. Biophysical and computational studies indicate that LL37's mechanism of action is through the disruption of the viral membrane. This antiviral activity of LL37 is enhanced by the hydrotropic action of niacinamide, which may increase the bioavailability of the AMP. Interestingly, we observed an inverse correlation between LL37 levels and disease severity of COVID-19 positive patients, suggesting enhancement of AMP response as a potential therapeutic avenue to mitigate disease severity. The combination of niacinamide and LL37 is a potent antiviral formulation that targets viral membranes of various variants and can be an effective strategy to overcome vaccine escape.
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Affiliation(s)
- Tanay Bhatt
- IFOM-inStem Joint Research Laboratory, Centre for Inflammation and Tissue Homeostasis, Institute for Stem Cell Science and Regenerative Medicine (inStem), Bangalore, Karnataka, India
| | - Binita Dam
- IFOM-inStem Joint Research Laboratory, Centre for Inflammation and Tissue Homeostasis, Institute for Stem Cell Science and Regenerative Medicine (inStem), Bangalore, Karnataka, India
- Department of Biological Sciences, Manipal Academy of Higher Education (MAHE), Manipal, Karnataka, India
| | - Sneha Uday Khedkar
- IFOM-inStem Joint Research Laboratory, Centre for Inflammation and Tissue Homeostasis, Institute for Stem Cell Science and Regenerative Medicine (inStem), Bangalore, Karnataka, India
| | - Sahil Lall
- National Centre for Biological Sciences (TIFR), Bangalore, Karnataka, India
| | - Subhashini Pandey
- Integrative Chemical Biology, Institute for Stem Cell Science and Regenerative Medicine (inStem), Bangalore, Karnataka, India
| | - Sunny Kataria
- IFOM-inStem Joint Research Laboratory, Centre for Inflammation and Tissue Homeostasis, Institute for Stem Cell Science and Regenerative Medicine (inStem), Bangalore, Karnataka, India
| | - Johan Ajnabi
- IFOM-inStem Joint Research Laboratory, Centre for Inflammation and Tissue Homeostasis, Institute for Stem Cell Science and Regenerative Medicine (inStem), Bangalore, Karnataka, India
- Department of Biological Sciences, Manipal Academy of Higher Education (MAHE), Manipal, Karnataka, India
| | | | | | | | | | | | - Praveen Kumar Vemula
- Integrative Chemical Biology, Institute for Stem Cell Science and Regenerative Medicine (inStem), Bangalore, Karnataka, India
| | | | | | - Colin Jamora
- IFOM-inStem Joint Research Laboratory, Centre for Inflammation and Tissue Homeostasis, Institute for Stem Cell Science and Regenerative Medicine (inStem), Bangalore, Karnataka, India
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7
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Rapid, selective, and room temperature dissolution of crystalline xylan by a hydrotrope. Carbohydr Polym 2023; 300:120245. [DOI: 10.1016/j.carbpol.2022.120245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Revised: 10/16/2022] [Accepted: 10/17/2022] [Indexed: 11/07/2022]
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8
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Ajayi S, Asakereh I, Rezasoltani H, Davidson D, Khajehpour M. Does Urea Preferentially Interact with Amide Moieties or Nonpolar Sidechains? A Question Answered Through a Judicious Selection of Model Systems. Chemphyschem 2022; 24:e202200731. [PMID: 36478636 DOI: 10.1002/cphc.202200731] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 12/02/2022] [Accepted: 12/06/2022] [Indexed: 12/13/2022]
Abstract
The transfer model suggests that urea unfolds proteins mainly by increasing the solubility of the amide backbone, probably through urea-induced increase in hydrogen bonding. Other studies suggest that urea addition increases the magnitude of solvent-solute van der Waals interactions, which increases the solubility of nonpolar sidechains. More recent analyses hypothesize that urea has a similar effect in increasing the solubility of backbone and sidechain groups. In this work, we compare the effects of urea addition on the solvation of amides and alkyl groups. At first, we study the effects of urea addition upon solvent hydrogen bonding acidity and basicity through the perturbation in the fluorescence spectrum of probes 1-AN and 1-DMAN. Our results demonstrate that the solvent's hydrogen bonding properties are minimally affected by urea addition. Subsequently, we show that urea addition does not perturb the intra-molecular hydrogen bonding in salicylic acid significantly. Finally, we investigate how urea preferentially interacts with amide and alkyl groups moieties in water by comparing the effects of urea addition upon the solubility of acetaminophen and 4-tertbutylphenol. We show that urea affects amide and t-butyl solubility (lowers the transfer free energy of both amide (backbone) and alkyl (sidechain) groups) in a similar fashion. In other words, preferential interaction of urea with both moieties contributes to protein denaturation.
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Affiliation(s)
- Simisola Ajayi
- Department of Chemistry, the, University of Manitoba, Winnipeg, MB, R3T 2N2, Canada
| | - Iman Asakereh
- Department of Chemistry, the, University of Manitoba, Winnipeg, MB, R3T 2N2, Canada
| | - Hanieh Rezasoltani
- Department of Chemistry, the, University of Manitoba, Winnipeg, MB, R3T 2N2, Canada
| | - David Davidson
- Department of Chemistry, the, University of Manitoba, Winnipeg, MB, R3T 2N2, Canada
| | - Mazdak Khajehpour
- Department of Chemistry, the, University of Manitoba, Winnipeg, MB, R3T 2N2, Canada
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9
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Ya. Zakharova L, Vasilieva EA, Mirgorodskaya AB, Zakharov SV, Pavlov RV, Kashapova NE, Gaynanova GA. Hydrotropes: solubilization of nonpolar compounds and modification of surfactant solutions. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
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10
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Zhang Z, Ekanem EE, Nakajima M, Bolognesi G, Vladisavljević GT. Monodispersed Sirolimus-Loaded PLGA Microspheres with a Controlled Degree of Drug–Polymer Phase Separation for Drug-Coated Implantable Medical Devices and Subcutaneous Injection. ACS APPLIED BIO MATERIALS 2022; 5:3766-3777. [PMID: 35848106 PMCID: PMC9382632 DOI: 10.1021/acsabm.2c00319] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
![]()
Monodispersed sirolimus (SRL)-loaded poly(lactic-co-glycolic acid) microspheres with a diameter of 1.8, 3.8,
and 8.5
μm were produced by high-throughput microfluidic step emulsification—solvent
evaporation using single crystal silicon chips consisted of 540–1710
terraced microchannels with a depth of 2, 4, or 5 μm arranged
in 10 parallel arrays. Uniform sized droplets were generated over
25 h across all channels. Nearly 15% of the total drug was released
by the initial burst release during an accelerated drug release testing
performed at 37 °C using a hydrotropic solution containing 5.8
M N,N-diethylnicotinamide. After
24 h, 71% of the drug was still entrapped in the particles. The internal
morphology of microspheres was investigated by fluorescence microscopy
using Nile red as a selective fluorescent stain with higher binding
affinity toward SRL. By increasing the drug loading from 33 to 50
wt %, the particle morphology evolved from homogeneous microspheres,
in which the drug and polymer were perfectly mixed, to patchy particles,
with amorphous drug patches embedded within a polymer matrix to anisotropic
patchy Janus particles. Janus particles with fully segregated drug
and polymer regions were achieved by pre-saturating the aqueous phase
with the organic solvent, which decreased the rate of solvent evaporation
and allowed enough time for complete phase separation. This approach
to manufacturing drug-loaded monodisperse microparticles can enable
the development of more effective implantable drug-delivery devices
and improved methods for subcutaneous drug administration, which can
lead to better therapeutic treatments.
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Affiliation(s)
- Zilin Zhang
- Department of Chemical Engineering, Loughborough University, Loughborough LE11 3TU, U.K
- Guangxi Key Laboratory of Green Chemical Materials and Safety Technology, Beibu Gulf University, Qinzhou 535011, China
| | - Ekanem E. Ekanem
- Department of Chemical Engineering, Loughborough University, Loughborough LE11 3TU, U.K
- Department of Chemical Engineering, University of Bath, Bath BA2 7AY, U.K
| | - Mitsutoshi Nakajima
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8572, Japan
| | - Guido Bolognesi
- Department of Chemical Engineering, Loughborough University, Loughborough LE11 3TU, U.K
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11
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Patel AD, Desai MA. Progress in the field of hydrotropy: mechanism, applications and green concepts. REV CHEM ENG 2022. [DOI: 10.1515/revce-2021-0012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Sustainability and greenness are the concepts of growing interest in the area of research as well as industries. One of the frequently encountered challenges faced in research and industrial fields is the solubility of the hydrophobic compound. Conventionally organic solvents are used in various applications; however, their contribution to environmental pollution, the huge energy requirement for separation and higher consumption lead to unsustainable practice. We require solvents that curtail the usage of hazardous material, increase the competency of mass and energy and embrace the concept of recyclability or renewability. Hydrotropy is one of the approaches for fulfilling these requirements. The phenomenon of solubilizing hydrophobic compound using hydrotrope is termed hydrotropy. Researchers of various fields are attracted to hydrotropy due to its unique physicochemical properties. In this review article, fundamentals about hydrotropes and various mechanisms involved in hydrotropy have been discussed. Hydrotropes are widely used in separation, heterogeneous chemical reactions, natural product extraction and pharmaceuticals. Applications of hydrotropes in these fields are discussed at length. We have examined the significant outcomes and correlated them with green engineering and green chemistry principles, which could give an overall picture of hydrotropy as a green and sustainable approach for the above applications.
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Affiliation(s)
- Akash D. Patel
- Department of Chemical Engineering , Sardar Vallabhbhai National Institute of Technology , Surat 395007 , Gujarat , India
| | - Meghal A. Desai
- Department of Chemical Engineering , Sardar Vallabhbhai National Institute of Technology , Surat 395007 , Gujarat , India
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12
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Martínez L. ComplexMixtures.jl: Investigating the structure of solutions of complex-shaped molecules from a solvent-shell perspective. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.117945] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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13
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Improved Bioavailability of Repaglinide by Utilizing Hydrotropy-Solid Dispersing Techniques and Prepared Its Dropping Pills. J Pharm Innov 2022. [DOI: 10.1007/s12247-021-09615-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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14
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Martins AC, Benfica J, Perez-Sanchez G, Shimizu S, Sintra T, Schaeffer N, Coutinho JAP. Assessing the hydrotropic effect in the presence of electrolytes: competition between solute salting-out and salt-induced hydrotrope aggregation. Phys Chem Chem Phys 2022; 24:21645-21654. [DOI: 10.1039/d2cp00749e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Water solubility enhancement is a long-standing challenge in a multitude of chemistry-related fields. Hydrotropy is a simple and efficient method to improve the solubility of hydrophobic molecules in aqueous media....
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15
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Cheng Y, Hall DM, Boualavong J, Hickey RJ, Lvov SN, Gorski CA. Influence of Hydrotropes on the Solubilities and Diffusivities of Redox-Active Organic Compounds for Aqueous Flow Batteries. ACS OMEGA 2021; 6:30800-30810. [PMID: 34805708 PMCID: PMC8600646 DOI: 10.1021/acsomega.1c05133] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Accepted: 10/19/2021] [Indexed: 06/13/2023]
Abstract
In this study, we explored the extent to which hydrotropes can be used to increase the aqueous solubilities of redox-active compounds previously used in flow batteries. We measured how five hydrotropes influenced the solubilities of five redox-active compounds already soluble in aqueous electrolytes (≥0.5 M). The solubilities of the compounds varied as a function of hydrotrope type and concentration, with larger solubility changes observed at higher hydrotrope concentrations. 4-OH-TEMPO underwent the largest solubility increase (1.18 ± 0.04 to 1.99 ± 0.12 M) in 20 weight percent sodium xylene sulfonate. The presence of a hydrotrope in solution decreased the diffusion coefficients of 4-OH-TEMPO and 4,5-dihydroxy-1,3-benzenedisulfonate, which was likely due to the increased solution viscosity as opposed to a specific hydrotrope-solute interaction because the hydrotropes did not alter their molecules' hydraulic radii. The standard rate constants and formal potentials of both 4-OH-TEMPO and 4,5-dihydroxy-1,3-benzenedisulfonate remained largely unchanged in the presence of a hydrotrope. The results suggest that using hydrotropes may be a feasible strategy for increasing the solubilities of redox-active compounds in aqueous flow batteries without substantially altering their electrochemical properties.
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Affiliation(s)
- Yingchi Cheng
- Department
of Civil and Environmental Engineering, Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Derek M. Hall
- Department
of Energy and Mineral Engineering, Pennsylvania
State University, University
Park, Pennsylvania 16802, United States
- Earth
and Mineral Sciences Energy Institute, Pennsylvania
State University, University
Park, Pennsylvania 16802, United States
| | - Jonathan Boualavong
- Department
of Civil and Environmental Engineering, Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Robert J. Hickey
- Department
of Material Sciences and Engineering, Pennsylvania
State University, University
Park, Pennsylvania 16802, United States
| | - Serguei N. Lvov
- Department
of Energy and Mineral Engineering, Pennsylvania
State University, University
Park, Pennsylvania 16802, United States
- Earth
and Mineral Sciences Energy Institute, Pennsylvania
State University, University
Park, Pennsylvania 16802, United States
- Department
of Material Sciences and Engineering, Pennsylvania
State University, University
Park, Pennsylvania 16802, United States
| | - Christopher A. Gorski
- Department
of Civil and Environmental Engineering, Pennsylvania State University, University Park, Pennsylvania 16802, United States
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16
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Green solvents to tune the biomolecules’ solubilization in aqueous media: An experimental and in silico approach by COSMO-RS. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117314] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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17
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Ding S, Lyu Z, Li S, Ruan X, Fei M, Zhou Y, Niu X, Zhu W, Du D, Lin Y. Molecularly imprinted polypyrrole nanotubes based electrochemical sensor for glyphosate detection. Biosens Bioelectron 2021; 191:113434. [PMID: 34225056 DOI: 10.1016/j.bios.2021.113434] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 06/05/2021] [Accepted: 06/11/2021] [Indexed: 02/08/2023]
Abstract
An electrochemical sensor based on molecularly imprinted polypyrrole nanotubes (MIPNs) has been developed for the detection of glyphosate (Gly) with high sensitivity and specificity. Herein, the MIPNs are prepared by imprinting Gly sites on the surface of polypyrrole (PPy) nanotubes. The synthesized MIPNs have high electrical conductivity and exhibit rapid adsorption rate, enhanced affinity and specificity to Gly. An electrochemical sensor for Gly detection is fabricated by assembling MIPNs-modified screen-printed electrodes with a 3D-printed electrode holder, which is highly portable and suitable for real-time detection. The results demonstrate that the MIPNs-based electrochemical sensor for Gly exhibits a wide detection range of 2.5-350 ng/mL with a limit of detection (LOD) of 1.94 ng/mL. Besides, the Gly sensor possessed good stability, reproducibility, and excellent selectivity against other interferents. The practicability of the sensor is verified by detecting Gly in orange juice and rice beverages, indicating that the sensor is suitable for monitoring pesticides in actual food and environmental samples.
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Affiliation(s)
- Shichao Ding
- School of Mechanical and Materials Engineering, Washington State University, Pullman, WA, 99164, United States
| | - Zhaoyuan Lyu
- School of Mechanical and Materials Engineering, Washington State University, Pullman, WA, 99164, United States
| | - Suiqiong Li
- DL ADV-Tech, Pullman, WA, 99163, United States
| | - Xiaofan Ruan
- School of Mechanical and Materials Engineering, Washington State University, Pullman, WA, 99164, United States
| | - Mingen Fei
- School of Mechanical and Materials Engineering, Washington State University, Pullman, WA, 99164, United States
| | - Yang Zhou
- School of Mechanical and Materials Engineering, Washington State University, Pullman, WA, 99164, United States
| | - Xiangheng Niu
- School of Mechanical and Materials Engineering, Washington State University, Pullman, WA, 99164, United States
| | - Wenlei Zhu
- School of Mechanical and Materials Engineering, Washington State University, Pullman, WA, 99164, United States
| | - Dan Du
- School of Mechanical and Materials Engineering, Washington State University, Pullman, WA, 99164, United States
| | - Yuehe Lin
- School of Mechanical and Materials Engineering, Washington State University, Pullman, WA, 99164, United States.
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18
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Zhao Y, Wu T, Li H, Duan Y, Li H, Yang W. Influence of hydrotrope on solubility and bioavailability of curcumin: its complex formation and solid-state characterization. Drug Dev Ind Pharm 2021; 47:1392-1400. [PMID: 34668822 DOI: 10.1080/03639045.2021.1994987] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
In this study, meglumine (Meg) and arginine (Arg), acting as the hydrotrope, were used to form the stable curcumin (Cur)-hydrotrope complexes, respectively. Based on the single factor experiment optimization, the Cur-Meg/or Cur-Arg complex was prepared and then characterized by Fourier transform infrared spectroscopy (FTIR), X-ray powder diffraction (XRD), and differential scanning calorimetry (DSC). The results showed that Cur-Meg/Arg complexes bound together by hydrogen bonds/or ionic bonds were successfully prepared and the amorphous state of Cur appeared in their complexes. Compared with the Cur-Meg complex, Cur-Arg had better stability in stress testing. Cur-Meg/Arg complexes had a faster drug release rate in vitro and the area-under-curve (AUC) of Cur-Meg/Arg solutions in rats were at least 6.3-fold larger than that of the Cur suspensions. These findings suggest that hydrotropy combined with solid dispersion technique is a simple and effective way to improve the bioavailability of Cur.HIGHLIGHTSThe optimal Cur-Meg/or Cur-Arg complex powder was prepared and characterized.The Cur release rate in vitro was significantly improved.The bioavailability can be improved when using Cur-Meg/or Cur-Arg complex.A simple and effective way to improve the bioavailability of Cur.
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Affiliation(s)
- Yafei Zhao
- College of Pharmacy & Key Laboratory of Pharmaceutical Quality Control of Hebei Province, Hebei University, Baoding, China
| | - Tong Wu
- College of Pharmacy & Key Laboratory of Pharmaceutical Quality Control of Hebei Province, Hebei University, Baoding, China
| | - Hanghang Li
- College of Pharmacy & Key Laboratory of Pharmaceutical Quality Control of Hebei Province, Hebei University, Baoding, China
| | - Yumeng Duan
- College of Pharmacy & Key Laboratory of Pharmaceutical Quality Control of Hebei Province, Hebei University, Baoding, China
| | - Haiying Li
- College of Pharmacy & Key Laboratory of Pharmaceutical Quality Control of Hebei Province, Hebei University, Baoding, China
| | - Wenzhi Yang
- College of Pharmacy & Key Laboratory of Pharmaceutical Quality Control of Hebei Province, Hebei University, Baoding, China
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19
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Sarkar S, Mondal J. Mechanistic Insights on ATP's Role as a Hydrotrope. J Phys Chem B 2021; 125:7717-7731. [PMID: 34240882 DOI: 10.1021/acs.jpcb.1c03964] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Hydrotropes are the small amphiphilic molecules which help in solubilizing hydrophobic entities in an aqueous medium. Recent experimental investigation has provided convincing evidence that adenosine triphosphate (ATP), besides being the energy currency of cell, also can act as a hydrotrope to inhibit the formation of protein condensates. In this work, we have designed computer simulations of prototypical macromolecules in aqueous ATP solution to dissect the molecular mechanism underlying ATP's newly discovered role as a hydrotrope. The simulation demonstrates that ATP can unfold a single chain of hydrophobic macromolecule as well as can disrupt the aggregation process of a hydrophobic assembly. Moreover, the introduction of charges in the macromolecule is found to reinforce ATP's disaggregation effects in a synergistic fashion, a behavior reminiscent of recent experimental observation of pronounced hydrotropic action of ATP in intrinsically disordered proteins. Molecular analysis indicates that this newfound ability of ATP is ingrained in its propensity of preferential binding to the polymer surface, which gets fortified in the presence of charges. The investigation also renders evidence that the key to the ATP's superior hydrotropic role over chemical hydrotropes (sodium xylene sulfonate, NaXS) may lie in its inherent self-aggregation propensity. Overall, via employing a bottom-up approach, the current investigation provides fresh mechanistic insights into the dual solubilizing and denaturing abilities of ATP.
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Affiliation(s)
- Susmita Sarkar
- Center for Interdisciplinary Sciences, Tata Institute of Fundamental Research, Hyderabad 500046, India
| | - Jagannath Mondal
- Center for Interdisciplinary Sciences, Tata Institute of Fundamental Research, Hyderabad 500046, India
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20
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Yang X, Tang Y, Wang M, Wang Y, Wang W, Pang M, Xu Y. Co-delivery of methotrexate and nicotinamide by cerosomes for topical psoriasis treatment with enhanced efficacy. Int J Pharm 2021; 605:120826. [PMID: 34171426 DOI: 10.1016/j.ijpharm.2021.120826] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 05/30/2021] [Accepted: 06/20/2021] [Indexed: 12/23/2022]
Abstract
Psoriasis is an immune-mediated skin disorder that affects populations worldwide. Methotrexate (MTX) is a cytotoxic drug with powerful anti-proliferative and anti-inflammatory effects that has gained prominence in treating inflammatory diseases including psoriasis. However, low solubility and side effects through oral administration hinder its systemic application. In this study, we developed a novel niosomes based on ceramide (cerosomes) to co-deliver MTX and nicotinamide (NIC), i.e., MTX/NIC cerosomes, for topically treating psoriasis with the aim to enhancing the efficacy and reducing the toxicity. NIC significantly solublized MTX by forming hydrogen bonds with MTX. In vitro and in vivo permeation studies showed that the cerosomes significantly promoted drug permeation through and retention in the skin, and the enhancing mechanism was clarified by Fourier transform infraredand Raman spectroscopy. MTX/NIC cerosomes exhibited strong anti-proliferation effect on lipopolysaccharide- irritated HaCaT cells by arresting the cell cycle at S phase and inducing apoptosis. Importantly, compared to MTX oral administration, topical application of MTX/NIC cerosomes on imiquimod (IMQ)-induced psoriatic mouse model exhibited a superior performance in ameliorating skin lesions, reducing spleen index and epidermal thickness, and downregulating the mRNA expression levels of proinflammatory cytokines including TNFα, IL-23, IL-17A, IL-6, IL-1β, and IL-22. Taken together, MTX/NIC cerosomes is a promising approach for psoriasis topical treatment.
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Affiliation(s)
- Xiaoyuan Yang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Yujia Tang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Meng Wang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Yixuan Wang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Wenxiu Wang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Meilu Pang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Yuehong Xu
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China.
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21
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Paul R, Chattaraj KG, Paul S. Role of Hydrotropes in Sparingly Soluble Drug Solubilization: Insight from a Molecular Dynamics Simulation and Experimental Perspectives. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:4745-4762. [PMID: 33853331 DOI: 10.1021/acs.langmuir.1c00169] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Drug molecules' therapeutic efficacy depends on their bioavailability and solubility. But more than 70% of the formulated drug molecules show limited effectiveness due to low water solubility. Thus, the water solubility enhancement technique of drug molecules becomes the need of time. One such way is hydrotropy. The solubilizing agent of a hydrophobic molecule is generally referred to as a hydrotrope, and this phenomenon is termed hydrotropy. This method has high industrial demand, as hydrotropes are noninflammable, readily available, environmentally friendly, quickly recovered, cost-effective, and not involved in solid emulsification. The endless importance of hydrotropes in industry (especially in the pharmaceutical industry) motivated us to prepare a feature article with a clear introduction, detailed mechanistic insights into the hydrotropic solubilization of drug molecules, applications in pharma industries, and some future directions of this technique. Thus, we believe that this feature article will become an adequate manual for the pharmaceutical researchers who want to explore all of the past perspectives of the hydrotropic action of hydrotropes in pharmaceutics.
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Affiliation(s)
- Rabindranath Paul
- Department of Chemistry, Indian Institute of Technology, Guwahati, Assam 781039, India
| | | | - Sandip Paul
- Department of Chemistry, Indian Institute of Technology, Guwahati, Assam 781039, India
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22
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Sintra TE, Abranches DO, Benfica J, Soares BP, Ventura SPM, Coutinho JAP. Cholinium-based ionic liquids as bioinspired hydrotropes to tackle solubility challenges in drug formulation. Eur J Pharm Biopharm 2021; 164:86-92. [PMID: 33895294 DOI: 10.1016/j.ejpb.2021.04.013] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Revised: 04/04/2021] [Accepted: 04/16/2021] [Indexed: 12/12/2022]
Abstract
Hydrotropy is a well-established strategy to enhance the aqueous solubility of hydrophobic drugs, facilitating their formulation for oral and dermal delivery. However, most hydrotropes studied so far possess toxicity issues and are inefficient, with large amounts being needed to achieve significant solubility increases. Inspired by recent developments in the understanding of the mechanism of hydrotropy that reveal ionic liquids as powerful hydrotropes, in the present work the use of cholinium vanillate, cholinium gallate, and cholinium salicylate to enhance the aqueous solubility of two model drugs, ibuprofen and naproxen, is investigated. It is shown that cholinium vanillate and cholinium gallate are able to increase the solubility of ibuprofen up to 500-fold, while all three ionic liquids revealed solubility enhancements up to 600-fold in the case of naproxen. Remarkably, cholinium salicylate increases the solubility of ibuprofen up to 6000-fold. The results obtained reveal the exceptional hydrotropic ability of cholinium-based ionic liquids to increase the solubility of hydrophobic drugs, even at diluted concentrations (below 1 mol·kg-1), when compared with conventional hydrotropes. These results are especially relevant in the field of drug formulation due to the bio-based nature of these ionic liquids and their low toxicity profiles. Finally, the solubility mechanism in these novel hydrotropes is shown to depend on synergism between both amphiphilic ions.
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Affiliation(s)
- Tânia E Sintra
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Dinis O Abranches
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Jordana Benfica
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Bruna P Soares
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Sónia P M Ventura
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - João A P Coutinho
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal.
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23
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Abstract
Sudden onset of solubilization is observed widely around or below the critical micelle concentration (CMC) of surfactants. It has also been reported that micellization is induced by the solutes even below CMC and the solubilized solute increases the aggregation number of the surfactant. These observations suggest enhanced cooperativity in micellization upon solubilization. Recently, we have developed a rigorous statistical thermodynamic theory of cooperative solubilization. Its application to hydrotropy revealed the mechanism of cooperative hydrotropy: hydrotrope self-association enhanced by solutes. Here we generalize our previous cooperative solubilization theory to surfactants. We have shown that the well-known experimental observations, such as the reduction of CMC in the presence of the solutes and the increase of aggregation number, are the manifestations of cooperative solubilization. Thus, the surfactant self-association enhanced by a solute is the driving force of cooperativity and a part of a universal cooperative solubilization mechanism common to hydrotropes and surfactants at low concentrations.
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Affiliation(s)
- Seishi Shimizu
- York Structural Biology Laboratory, Department of Chemistry, University of York, Heslington, York YO10 5DD, UK.
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24
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Abranches DO, Benfica J, Soares BP, Ferreira AM, Sintra TE, Shimizu S, Coutinho JAP. The impact of the counterion in the performance of ionic hydrotropes. Chem Commun (Camb) 2021; 57:2951-2954. [PMID: 33621286 DOI: 10.1039/d0cc08092f] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
The efficiency of an ionic hydrotrope is shown to increase with the hydrophobicity of its counterion, challenging the common view that ionic hydrotropes should possess a small, densely charged counterion such as sodium or chloride.
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Affiliation(s)
- Dinis O Abranches
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - Jordana Benfica
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - Bruna P Soares
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - Ana M Ferreira
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - Tânia E Sintra
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - Seishi Shimizu
- York Structural Biology Laboratory, Department of Chemistry, University of York, Heslington, York YO10 5DD, UK
| | - João A P Coutinho
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal.
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25
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Bastos H, Bento R, Schaeffer N, Coutinho JAP, Pérez-Sánchez G. Using coarse-grained molecular dynamics to rationalize biomolecule solubilization mechanisms in ionic liquid-based colloidal systems. Phys Chem Chem Phys 2020; 22:24771-24783. [PMID: 33107535 DOI: 10.1039/d0cp04942e] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Solubilizing agents are widely used to extract poorly soluble compounds from biological matrices. Aqueous solutions of surfactants and hydrotropes are commonly used as solubilizers, however, the underlying mechanism that determines their action is still roughly understood. Among these, ionic liquids (IL) are often used not only for solubilization of a target compound but in liquid-liquid extraction processes. Molecular dynamics simulations can shed light into this issue by providing a microscopic insight of the interactions between solute and solubilising agents. In this work, a new coarse-grained (CG) model was developed under the MARTINI framework for gallic acid (GA) while the CG models of three quaternary ammonium ionic liquids and salts (QAILS) were obtained from literature. Three QAILS were selected bearing in mind their potential solubilising mechanisms: trimethyl-tetradecylammonium chloride ([N1,1,1,14]Cl) as a surfactant, tetrabutylammonium chloride ([N4,4,4,4]Cl) as a hydrotrope, and tributyl-tetradecylammonium chloride ([N4,4,4,14]Cl) as a system combining the characteristics of the other compounds. Throughout this hydrotrope-to-surfactant spectrum and considering the most prevalent GA species across the pH range, the solvation of GA at two concentration levels in aqueous QAILS solutions were studied and discussed. The results of this study indicate that dispersive interactions between the QAILS and GA are generally the driving force in the GA solubilization. However, electrostatic interactions play an increasingly significant role as the GA becomes deprotonated, affecting their placement within the micelle and ultimately the solvation mechanism. The hydrotropic mechanism seen in [N4,4,4,4]Cl corroborates recent models based on the formation of a hydrotrope-solute aggregates driven by dispersive forces. This work contributes to the application of a transferable approach to partition and solubilization studies using molecular dynamics, which could complement experimental assays and quickly screen molecular candidates for these processes.
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Affiliation(s)
- Henrique Bastos
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-1933 Aveiro, Portugal.
| | - Ricardo Bento
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-1933 Aveiro, Portugal.
| | - Nicolas Schaeffer
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-1933 Aveiro, Portugal.
| | - João A P Coutinho
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-1933 Aveiro, Portugal.
| | - Germán Pérez-Sánchez
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-1933 Aveiro, Portugal.
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26
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Shimizu S, Matubayasi N. Intensive nature of fluctuations: Reconceptualizing Kirkwood-Buff theory via elementary algebra. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.114225] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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27
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28
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Patel AD, Desai MA. Aggregation Behavior and Thermodynamic Studies of Hydrotropes: A Review. TENSIDE SURFACT DET 2020. [DOI: 10.3139/113.110686] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Abstract
Under the aspect of strict environmental regulations, hydrotropy is accepted as an environmentally friendly (“green”) approach to solubilise hydrophobic compounds. Above the minimum hydrotrope concentration (MHC), hydrotropes are capable of self-aggregation; the MHC is considered the minimum requirement for solubilisation. In this article a comprehensive overview of the aggregation behaviour of different hydrotropes is presented. Details about the methods used for aggregation are given. The role of additives is discussed with respect to their influence on the MHC. Thermodynamic studies are used to evaluate the stability of a hydrotrope at different temperatures. A modern approach to the solubilization mechanism using hydrotropes is also presented in this review article. The aim of this article is to provide guidance for conducting such studies on a number of hydrotropes.
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29
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Okuno Y, Szabo A, Clore GM. Quantitative Interpretation of Solvent Paramagnetic Relaxation for Probing Protein-Cosolute Interactions. J Am Chem Soc 2020; 142:8281-8290. [PMID: 32286812 DOI: 10.1021/jacs.0c00747] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Protein-small cosolute molecule interactions are ubiquitous and known to modulate the solubility, stability, and function of many proteins. Characterization of such transient weak interactions at atomic resolution remains challenging. In this work, we develop a simple and practical NMR method for extracting both energetic and dynamic information on protein-cosolute interactions from solvent paramagnetic relaxation enhancement (sPRE) measurements. Our procedure is based on an approximate (non-Lorentzian) spectral density that behaves exactly at both high and low frequencies. This spectral density contains two parameters, one global related to the translational diffusion coefficient of the paramagnetic cosolute, and the other residue specific. These parameters can be readily determined from sPRE data, and then used to calculate analytically a concentration normalized equilibrium average of the interspin distance, ⟨r-6⟩norm, and an effective correlation time, τC, that provide measures of the energetics and dynamics of the interaction at atomic resolution. We compare our approach with existing ones, and demonstrate the utility of our method using experimental 1H longitudinal and transverse sPRE data recorded on the protein ubiquitin in the presence of two different nitroxide radical cosolutes, at multiple static magnetic fields. The approach for analyzing sPRE data outlined here provides a powerful tool for deepening our understanding of extremely weak protein-cosolute interactions.
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Affiliation(s)
- Yusuke Okuno
- Laboratory of Chemical Physics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892-0520, United States
| | - Attila Szabo
- Laboratory of Chemical Physics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892-0520, United States
| | - G Marius Clore
- Laboratory of Chemical Physics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892-0520, United States
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30
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Abranches DO, Benfica J, Soares BP, Leal-Duaso A, Sintra TE, Pires E, Pinho SP, Shimizu S, Coutinho JAP. Unveiling the mechanism of hydrotropy: evidence for water-mediated aggregation of hydrotropes around the solute. Chem Commun (Camb) 2020; 56:7143-7146. [DOI: 10.1039/d0cc03217d] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The mechanism of hydrotropy is experimentally proven in this work. Apolarity is shown to be the driving force of hydrotropy.
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Affiliation(s)
- Dinis O. Abranches
- CICECO – Aveiro Institute of Materials
- Department of Chemistry
- University of Aveiro
- 3810-193 Aveiro
- Portugal
| | - Jordana Benfica
- CICECO – Aveiro Institute of Materials
- Department of Chemistry
- University of Aveiro
- 3810-193 Aveiro
- Portugal
| | - Bruna P. Soares
- CICECO – Aveiro Institute of Materials
- Department of Chemistry
- University of Aveiro
- 3810-193 Aveiro
- Portugal
| | - Alejandro Leal-Duaso
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH-CSIC) Facultad de Ciencias, C. S. I. C. – Universidad de Zaragoza
- E-50009 Zaragoza
- Spain
| | - Tânia E. Sintra
- CICECO – Aveiro Institute of Materials
- Department of Chemistry
- University of Aveiro
- 3810-193 Aveiro
- Portugal
| | - Elísabet Pires
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH-CSIC) Facultad de Ciencias, C. S. I. C. – Universidad de Zaragoza
- E-50009 Zaragoza
- Spain
| | - Simão P. Pinho
- Centro de Investigação de Montanha (CIMO)
- Instituto Politécnico de Bragança
- 5300-253 Bragança
- Portugal
| | - Seishi Shimizu
- York Structural Biology Laboratory
- Department of Chemistry
- University of York
- York YO10 5DD
- UK
| | - João A. P. Coutinho
- CICECO – Aveiro Institute of Materials
- Department of Chemistry
- University of Aveiro
- 3810-193 Aveiro
- Portugal
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31
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Wysoczanska K, Macedo EA, Sadowski G, Held C. Solubility Enhancement of Vitamins in Water in the Presence of Covitamins: Measurements and ePC-SAFT Predictions. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b04302] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Kamila Wysoczanska
- Associate Laboratory of Separation and Reaction Engineering-Laboratory of Catalysis and Materials (LSRE-LCM), Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Eugénia A. Macedo
- Associate Laboratory of Separation and Reaction Engineering-Laboratory of Catalysis and Materials (LSRE-LCM), Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Gabriele Sadowski
- Laboratory of Thermodynamics, Department of Biochemical and Chemical Engineering, Technische Universität Dortmund, Emil-Figge-Str. 70, 44227 Dortmund, Germany
| | - Christoph Held
- Laboratory of Thermodynamics, Department of Biochemical and Chemical Engineering, Technische Universität Dortmund, Emil-Figge-Str. 70, 44227 Dortmund, Germany
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32
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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: 1.8] [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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33
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Reid JESJ, Aquino PHG, Walker AJ, Karadakov PB, Shimizu S. Statistical Thermodynamics Unveils How Ions Influence an Aqueous Diels‐Alder Reaction. Chemphyschem 2019; 20:1538-1544. [DOI: 10.1002/cphc.201900024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Revised: 03/15/2019] [Indexed: 11/06/2022]
Affiliation(s)
- Joshua E. S. J. Reid
- York Structural Biology Laboratory Department of ChemistryUniversity of York Heslington York YO10 5DD United Kingdom
- Bioniqs Ltd., BioCity Nottingham Pennyfoot Street Nottingham NG1 1GF United Kingdom
| | - Pedro H. G. Aquino
- York Structural Biology Laboratory Department of ChemistryUniversity of York Heslington York YO10 5DD United Kingdom
| | - Adam J. Walker
- Bioniqs Ltd., BioCity Nottingham Pennyfoot Street Nottingham NG1 1GF United Kingdom
| | - Peter B. Karadakov
- Department of ChemistryUniversity of York Heslington York YO10 5DD United Kingdom
| | - Seishi Shimizu
- York Structural Biology Laboratory Department of ChemistryUniversity of York Heslington York YO10 5DD United Kingdom
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34
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De bruyn M, Budarin VL, Misefari A, Shimizu S, Fish H, Cockett M, Hunt AJ, Hofstetter H, Weckhuysen BM, Clark JH, Macquarrie DJ. Geminal Diol of Dihydrolevoglucosenone as a Switchable Hydrotrope: A Continuum of Green Nanostructured Solvents. ACS SUSTAINABLE CHEMISTRY & ENGINEERING 2019; 7:7878-7883. [PMID: 32953281 PMCID: PMC7493416 DOI: 10.1021/acssuschemeng.9b00470] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Revised: 03/11/2019] [Indexed: 06/11/2023]
Abstract
The addition of water to dihydrolevoglucosenone (Cyrene) creates a solvent mixture with highly unusual properties and the ability to specifically and efficiently solubilize a wide range of organic compounds, notably, aspirin, ibuprofen, salicylic acid, ferulic acid, caffeine, and mandelic acid. The observed solubility enhancement (up to 100-fold) can be explained only by the existence of microenvironments mainly centered on Cyrene's geminal diol. Surprisingly, the latter acts as a reversible hydrotrope and regulates the polarity of the created complex mixture. The possibility to tune the polarity of the solvent mixture through the addition of water, and the subsequent generation of variable amounts of Cyrene's geminal diol, creates a continuum of green solvents with controllable solubilization properties. The effective presence of microheterogenieties in the Cyrene/water mixture was adequately proven by (1) Fourier transform infrared/density functional theory showing Cyrene dimerization, (2) electrospray mass-spectrometry demonstrating the existence of dimers of Cyrene's geminal diol, and (3) the variable presence of single or multiple tetramethylsilane peaks in the 1H NMR spectra of a range of Cyrene/water mixtures. The Cyrene-water solvent mixture is importantly not mutagenic, barely ecotoxic, bioderived, and endowed with tunable hydrophilic/hydrophobic properties.
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Affiliation(s)
- Mario De bruyn
- Department
of Chemical and Biological Engineering, University of Wisconsin-Madison, 1415 Engineering Drive, Madison, Wisconsin 53706, United States
- Faculty
of Science, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, CG
Utrecht 3584, The Netherlands
| | - Vitaliy L. Budarin
- Green Chemistry Centre of Excellence, Department of Chemistry, and Department of Chemistry, University of York, York YO10 5DD, United Kingdom
| | - Antonio Misefari
- Green Chemistry Centre of Excellence, Department of Chemistry, and Department of Chemistry, University of York, York YO10 5DD, United Kingdom
| | - Seishi Shimizu
- Green Chemistry Centre of Excellence, Department of Chemistry, and Department of Chemistry, University of York, York YO10 5DD, United Kingdom
| | - Heather Fish
- Green Chemistry Centre of Excellence, Department of Chemistry, and Department of Chemistry, University of York, York YO10 5DD, United Kingdom
| | - Martin Cockett
- Green Chemistry Centre of Excellence, Department of Chemistry, and Department of Chemistry, University of York, York YO10 5DD, United Kingdom
| | - Andrew J. Hunt
- Materials
Chemistry Research Center, Department of Chemistry and Center of Excellence
for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Heike Hofstetter
- Department
of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Bert M. Weckhuysen
- Faculty
of Science, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, CG
Utrecht 3584, The Netherlands
| | - James H. Clark
- Green Chemistry Centre of Excellence, Department of Chemistry, and Department of Chemistry, University of York, York YO10 5DD, United Kingdom
| | - Duncan J. Macquarrie
- Green Chemistry Centre of Excellence, Department of Chemistry, and Department of Chemistry, University of York, York YO10 5DD, United Kingdom
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35
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Buchelnikov AS, Evstigneev VP, Evstigneev MP. Hetero-association models of non-covalent molecular complexation. Phys Chem Chem Phys 2019; 21:7717-7731. [PMID: 30931443 DOI: 10.1039/c8cp03183e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The present review discusses the current state-of-the-art in building models enabling the description of non-covalent equilibrium complexation of different types of molecules in solution, which results in the formation of supramolecular structures different in length and composition (hetero-association or supramolecular multicomponent co-polymerisation). The description is focused on standard physical and chemical quantities such as experimental observables and equilibrium parameters of interaction (equilibrium constants and concentrations). The major partial cases of the hetero-association models, such as finite and indefinite isodesmic and cooperative complexations, and Benesi-Hildebrand and Langmuir adsorption models are considered. Future challenges in the development of the hetero-association models are provided.
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36
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Yin T, Chen Y, Shen W. Aggregation of an ionic-liquid type hydrotrope 1-Butyl-3-methylimidazolium p-toluenesulfonate in aqueous solution. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2018.12.032] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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37
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Shimizu S, Abbott S, Adamska K, Voelkel A. Quantifying non-specific interactions via liquid chromatography. Analyst 2019; 144:1632-1641. [PMID: 30644458 DOI: 10.1039/c8an02244e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Determinations of solute-cosolute interactions from chromatography have often resulted in problems, such as the "antibinding" (or a negative binding constant) between the solute and micelle in micellar liquid chromatography (MLC) or indeterminacy of salt-ligand binding strength in high-performance affinity chromatography (HPAC). This shows that the stoichiometric binding models adopted in many chromatographic analyses cannot capture the non-specific nature of solvation interactions. In contrast, an approach using statistical thermodynamics handles these complexities without such problems and directly links chromatographic data to, for example, solubility data via a universal framework based on Kirkwood-Buff integrals (KBI) of the radial distribution functions. The chromatographic measurements can now be interpreted within this universal theoretical framework that has been used to rationalize small solute solubility, biomolecular stability, binding, aggregation and gelation. In particular, KBI analysis identifies key solute-cosolute interactions, including excluded volume effects. We present (i) how KBI can be obtained directly from the cosolute concentration dependence of the distribution coefficient, (ii) how the classical binding model, when used solely as a fitting model, can yield the KBIs directly from the literature data, and (iii) how chromatography and solubility measurements can be compared in the unified theoretical framework provided via KBIs without any arbitrary assumptions about the stationary phase. To perform our own analyses on multiple datasets we have used an "app". To aid readers' understanding and to allow analyses of their own datasets, the app is provided with many datasets and is freely available on-line as an open-source resource.
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Affiliation(s)
- Seishi Shimizu
- York Structural Biology Laboratory, Department of Chemistry, University of York, Heslington, York YO10 5DD, UK.
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38
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Nicol TW, Isobe N, Clark JH, Matubayasi N, Shimizu S. The mechanism of salt effects on starch gelatinization from a statistical thermodynamic perspective. Food Hydrocoll 2019. [DOI: 10.1016/j.foodhyd.2018.08.042] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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39
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40
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Shimizu S, Matubayasi N. Statistical thermodynamics of regular solutions and solubility parameters. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2018.10.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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41
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Gaudin T, Pezron I, Klamt A. New Molecular Descriptors to Identify Surfactants and Solubilizers from Electron Density Distributions. J SURFACTANTS DETERG 2018. [DOI: 10.1002/jsde.12225] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Théophile Gaudin
- Sorbonne Universités, Université de Technologie de Compiègne EA 4297 TIMR, rue du Dr Schweitzer, 60200, Compiègne France
- COSMOlogic GmbH&CoKG Imbacher Weg 46, D‐51379, Leverkusen Germany
| | - Isabelle Pezron
- Sorbonne Universités, Université de Technologie de Compiègne EA 4297 TIMR, rue du Dr Schweitzer, 60200, Compiègne France
| | - Andreas Klamt
- COSMOlogic GmbH&CoKG Imbacher Weg 46, D‐51379, Leverkusen Germany
- Institute of Physical and Theoretical ChemistryUniversität Regensburg Germany
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42
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Zeindlhofer V, Berger M, Steinhauser O, Schröder C. A shell-resolved analysis of preferential solvation of coffee ingredients in aqueous mixtures of the ionic liquid 1-ethyl-3-methylimidazolium acetate. J Chem Phys 2018; 148:193819. [PMID: 30307218 DOI: 10.1063/1.5009802] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Ionic liquids increase the solubility of various coffee ingredients in aqueous solution but little is known about the underlying mechanism. Kirkwood-Buff integrals as well as the potential of mean force indicate that the imidazolium cations are accumulated at the surface of the solutes, removing water molecules from the solute surface. Although hydrogen bonding of the anions to hydroxy groups of the solutes can be detected, their concentration at the surface is less enhanced compared to the cations. The decomposition into solvation shells by Voronoi tessellation reveals that structural features are only observed in the first solvation shell. Nevertheless, the depletion of water and the excess concentration of the ions and, in particular, of the cations are visible in the next solvation shells as well. Therefore, classical arguments of hydrotropic theory fail to explain this behavior.
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Affiliation(s)
- Veronika Zeindlhofer
- Faculty of Chemistry, Department of Computational Biological Chemistry, University of Vienna, Vienna A-1090, Austria
| | - Magdalena Berger
- Faculty of Chemistry, Department of Computational Biological Chemistry, University of Vienna, Vienna A-1090, Austria
| | - Othmar Steinhauser
- Faculty of Chemistry, Department of Computational Biological Chemistry, University of Vienna, Vienna A-1090, Austria
| | - Christian Schröder
- Faculty of Chemistry, Department of Computational Biological Chemistry, University of Vienna, Vienna A-1090, Austria
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43
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Chen W, Cheng CA, Lee BY, Clemens DL, Huang WY, Horwitz MA, Zink JI. Facile Strategy Enabling Both High Loading and High Release Amounts of the Water-Insoluble Drug Clofazimine Using Mesoporous Silica Nanoparticles. ACS APPLIED MATERIALS & INTERFACES 2018; 10:31870-31881. [PMID: 30160469 DOI: 10.1021/acsami.8b09069] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The use of nanocarriers to deliver poorly soluble drugs to the sites of diseases is an attractive and general method, and mesoporous silica nanoparticles (MSNs) are increasingly being used as carriers. However, both loading a large amount of drugs into the pores and still being able to release the drug is a challenge. In this paper, we demonstrate a general strategy based on a companion molecule that chaperones the drug into the pores and also aids it in escaping. A common related strategy is to use a miscible co-solvent dimethyl sulfoxide (DMSO), but although loading may be efficient in DMSO, this co-solvent frequently diffuses into an aqueous environment, leaving the drug behind. We demonstrate the method by using acetophenone (AP), an FDA-approved food additive as the chaperone for clofazimine (CFZ), a water-insoluble antibiotic used to treat leprosy and multidrug-resistant tuberculosis. AP enables a high amount of CFZ cargo into the MSNs and also carries CFZ cargo out from the MSNs effectively when they are in an aqueous biorelevant environment. The amount of loading and the CFZ release efficiency from MSNs were optimized; 4.5 times more CFZ was loaded in MSNs with AP than that with DMSO and 2300 times more CFZ was released than that without the assistance of the AP. In vitro treatment of macrophages infected by Mycobacterium tuberculosis with the optimized CFZ-loaded MSNs killed the bacteria in the cells in a dose-dependent manner. These studies demonstrate a highly efficient method for loading nanoparticles with water-insoluble drug molecules and the efficacy of the nanoparticles in delivering drugs into eukaryotic cells in aqueous media.
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44
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Vanderveen JR, Burra S, Geng J, Goyon A, Jardine A, Shin HE, Andrea T, Dyson PJ, Jessop PG. Characterizing the Effects of a "Switchable Water" Additive on the Aqueous Solubility of Small Molecules. Chemphyschem 2018; 19:2093-2100. [PMID: 29451332 DOI: 10.1002/cphc.201701303] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2017] [Indexed: 11/12/2022]
Abstract
"Switchable water" is an aqueous solution containing a water-soluble amine additive that exhibits CO2 -switchable properties, such as large changes in ionic strength, by forming an ammonium bicarbonate salt. Switchable water has been used to reversibly "salt-out" organic compounds from water. This study explores the salting out of several compounds in switchable water when CO2 is present and also explores the solubility of small molecules in switchable water, compared to pure water, when CO2 is absent. The results show that organic compounds are generally more soluble in switchable water than pure water in the absence of CO2 , but less soluble in the presence of 1 atm CO2 . Exceptions include carboxylic acids and phenols which, presumably due to their acidity, are more soluble in switchable water than in pure water, even when CO2 is applied. Kirkwood-Buff solvation theory was applied to gain insights into the effects of the amine additive on the aqueous solubility of caffeine. Furthermore, the switchable properties of the additives allow for the preparation of switchable aqueous two-phase systems.
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Affiliation(s)
- Jesse R Vanderveen
- Department of Chemistry, Queen's University, Kingston, ON, K7L 3N6, Canada
| | - Sarika Burra
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne, 1015, Lausanne, Switzerland
| | - Jialing Geng
- Department of Chemistry, Queen's University, Kingston, ON, K7L 3N6, Canada
| | - Alexandre Goyon
- Department of Chemistry, Queen's University, Kingston, ON, K7L 3N6, Canada
| | - Alexander Jardine
- Department of Chemistry, Queen's University, Kingston, ON, K7L 3N6, Canada
| | - Hyejin E Shin
- Department of Chemistry, Queen's University, Kingston, ON, K7L 3N6, Canada
| | - Tamer Andrea
- Department of Chemistry, Queen's University, Kingston, ON, K7L 3N6, Canada
| | - Paul J Dyson
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne, 1015, Lausanne, Switzerland
| | - Philip G Jessop
- Department of Chemistry, Queen's University, Kingston, ON, K7L 3N6, Canada
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45
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Okamoto R, Onuki A. Theory of nonionic hydrophobic solutes in mixture solvent: Solvent-mediated interaction and solute-induced phase separation. J Chem Phys 2018; 149:014501. [DOI: 10.1063/1.5037673] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Ryuichi Okamoto
- Research Institute for Interdisciplinary Science, Okayama University, Okayama 700-8530, Japan
| | - Akira Onuki
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
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46
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Keša P, Jancura D, Kudláčová J, Valušová E, Antalík M. Excitation of triplet states of hypericin in water mediated by hydrotropic cromolyn sodium salt. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 193:185-191. [PMID: 29241053 DOI: 10.1016/j.saa.2017.12.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Revised: 11/10/2017] [Accepted: 12/01/2017] [Indexed: 06/07/2023]
Abstract
Hypericin (Hyp) is a hydrophobic pigment found in plants of the genus Hypericum which exhibits low levels of solubility in water. This work shows that the solubility of Hyp can be significantly increased through the addition of cromolyn disodium salt (DSCG). Performed studies using UV-VIS absorption and fluorescence spectroscopies demonstrate that Hyp remains in a predominantly biologically photodynamic active monomeric form in the presence of DSCG at concentrations ranging from 4.6×10-3 to 1.2×10-1mol·L-1. The low association constant between Hyp and DSCG (Ka=71.7±2M-1), and the polarity value of 0.3 determined for Hyp in a DSCG-water solution, lead to a suggestion that the monomerization of Hyp in aqueous solution can be explained as a result of the hydrotropic effect of DSCG. This hydrotropic effect is most likely a result of interactions between two relative rigid aromatic rings of DSCG and a delocalized charge on the surface of the Hyp molecule. The triplet-triplet (T-T) electronic transition observed in is Hyp in the presence of DSCG suggests a possible production of reactive oxygen species once Hyp is irradiated with visible light in a DSCG aqueous solution.
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Affiliation(s)
- Peter Keša
- Department of Biophysics, Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 040 01 Košice, Slovakia.
| | - Daniel Jancura
- Department of Biophysics, Faculty of Science, P.J. Šafárik University, Jesenná 5, 041 54 Košice, Slovakia; Center for Interdisciplinary Biosciences, Faculty of Science, P.J. Šafárik University, Jesenná 5, 041 54 Košice, Slovakia
| | - Júlia Kudláčová
- Department of Biochemistry, Faculty of Science, P.J. Šafárik University, Šrobárova 2, 041 80 Košice, Slovakia
| | - Eva Valušová
- Department of Biophysics, Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 040 01 Košice, Slovakia
| | - Marián Antalík
- Department of Biochemistry, Faculty of Science, P.J. Šafárik University, Šrobárova 2, 041 80 Košice, Slovakia; Department of Biophysics, Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 040 01 Košice, Slovakia
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47
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Patel A, Malinovska L, Saha S, Wang J, Alberti S, Krishnan Y, Hyman AA. ATP as a biological hydrotrope. Science 2018; 356:753-756. [PMID: 28522535 DOI: 10.1126/science.aaf6846] [Citation(s) in RCA: 600] [Impact Index Per Article: 85.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Accepted: 03/24/2017] [Indexed: 01/01/2023]
Abstract
Hydrotropes are small molecules that solubilize hydrophobic molecules in aqueous solutions. Typically, hydrotropes are amphiphilic molecules and differ from classical surfactants in that they have low cooperativity of aggregation and work at molar concentrations. Here, we show that adenosine triphosphate (ATP) has properties of a biological hydrotrope. It can both prevent the formation of and dissolve previously formed protein aggregates. This chemical property is manifested at physiological concentrations between 5 and 10 millimolar. Therefore, in addition to being an energy source for biological reactions, for which micromolar concentrations are sufficient, we propose that millimolar concentrations of ATP may act to keep proteins soluble. This may in part explain why ATP is maintained in such high concentrations in cells.
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Affiliation(s)
- Avinash Patel
- Max Planck Institute of Molecular Cell Biology and Genetics, 01307 Dresden, Germany
| | - Liliana Malinovska
- Max Planck Institute of Molecular Cell Biology and Genetics, 01307 Dresden, Germany
| | - Shambaditya Saha
- Max Planck Institute of Molecular Cell Biology and Genetics, 01307 Dresden, Germany
| | - Jie Wang
- Max Planck Institute of Molecular Cell Biology and Genetics, 01307 Dresden, Germany
| | - Simon Alberti
- Max Planck Institute of Molecular Cell Biology and Genetics, 01307 Dresden, Germany
| | - Yamuna Krishnan
- Department of Chemistry and Grossman Institute for Neuroscience, Quantitative Biology, and Human Behavior, University of Chicago, Chicago, IL 60637, USA.
| | - Anthony A Hyman
- Max Planck Institute of Molecular Cell Biology and Genetics, 01307 Dresden, Germany.
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48
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Sintra TE, Shimizu K, Ventura SPM, Shimizu S, Canongia Lopes JN, Coutinho JAP. Enhanced dissolution of ibuprofen using ionic liquids as catanionic hydrotropes. Phys Chem Chem Phys 2018; 20:2094-2103. [DOI: 10.1039/c7cp07569c] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ionic liquids as powerful hydrotropes for ibuprofen, where both cation and anion may contribute to the hydrotropic mechanism in a synergistic manner.
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Affiliation(s)
- T. E. Sintra
- CICECO – Aveiro Institute of Materials, Department of Chemistry, University of Aveiro
- 3810-193 Aveiro
- Portugal
| | - K. Shimizu
- Centro de Química Estrutural, Instituto Superior Técnico
- 1049-001 Lisboa
- Portugal
- Instituto de Tecnologia Química e Biológica, UNL
- 2780-901 Oeiras
| | - S. P. M. Ventura
- CICECO – Aveiro Institute of Materials, Department of Chemistry, University of Aveiro
- 3810-193 Aveiro
- Portugal
| | - S. Shimizu
- York Structural Biology Laboratory, Department of Chemistry, University of York
- Heslington
- UK
| | - J. N. Canongia Lopes
- Centro de Química Estrutural, Instituto Superior Técnico
- 1049-001 Lisboa
- Portugal
- Instituto de Tecnologia Química e Biológica, UNL
- 2780-901 Oeiras
| | - J. A. P. Coutinho
- CICECO – Aveiro Institute of Materials, Department of Chemistry, University of Aveiro
- 3810-193 Aveiro
- Portugal
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49
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Shimizu S, Matubayasi N. Statistical thermodynamic foundation for mesoscale aggregation in ternary mixtures. Phys Chem Chem Phys 2018; 20:13777-13784. [DOI: 10.1039/c8cp01207e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The origin of persistent mesoscale aggregation around the plait point has been clarified from statistical thermodynamics and differential geometry.
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Affiliation(s)
- Seishi Shimizu
- York Structural Biology Laboratory
- Department of Chemistry
- University of York
- York YO10 5DD
- UK
| | - Nobuyuki Matubayasi
- Division of Chemical Engineering, Graduate School of Engineering Science
- Osaka University
- Osaka 560-8531
- Japan
- Elements Strategy Initiative for Catalysts and Batteries
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50
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Nicol TWJ, Matubayasi N, Shimizu S. Origin of non-linearity in phase solubility: solubilisation by cyclodextrin beyond stoichiometric complexation. Phys Chem Chem Phys 2017; 18:15205-17. [PMID: 27206059 DOI: 10.1039/c6cp01582d] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The low solubility of drugs, which poses a serious problem in drug development, can in part be overcome by the use of cyclodextrins (CDs) and their derivatives. Here, the key to solubilisation is identified as the formation of inclusion complexes with the drug molecule. If inclusion complexation were the only contribution to drug solubility, it would increase linearly with CD concentration (as per the Higuchi-Connors model); this is because inclusion complexation is a 1 : 1 stoichiometric process. However, solubility curves often deviate from this linearity, whose mechanism is yet to be understood. Here we aim to clarify the origin of such non-linearity, based on the Kirkwood-Buff and the McMillan-Mayer theories of solutions. The rigorous statistical thermodynamic theory shows that non-linearity of solubilisation can be rationalised by two contributions: CD-drug interaction and the drug-induced change of CD-CD interaction.
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Affiliation(s)
- Thomas W J Nicol
- York Structural Biology Laboratory, Department of Chemistry, University of York, Heslington, York YO10 5DD, UK.
| | - Nobuyuki Matubayasi
- Division of Chemical Engineering, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan and Elements Strategy Initiative for Catalysts and Batteries, Kyoto University, Katsura, Kyoto 615-8520, Japan
| | - Seishi Shimizu
- York Structural Biology Laboratory, Department of Chemistry, University of York, Heslington, York YO10 5DD, UK.
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