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Carvalho SF, Custódio MH, Pereiro AB, Araújo JMM. Towards Enhanced Tunability of Aqueous Biphasic Systems: Furthering the Grasp of Fluorinated Ionic Liquids in the Purification of Proteins. Int J Mol Sci 2024; 25:5766. [PMID: 38891953 PMCID: PMC11172314 DOI: 10.3390/ijms25115766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2024] [Revised: 05/11/2024] [Accepted: 05/21/2024] [Indexed: 06/21/2024] Open
Abstract
This work unfolds functionalized ABSs composed of FILs ([C2C1Im][C4F9SO3] and [N1112(OH)][C4F9SO3]), mere fluoro-containing ILs ([C2C1Im][CF3SO3] and [C4C1Im][CF3SO3]), known globular protein stabilizers (sucrose and [N1112(OH)][C4F9SO3]), low-molecular-weight carbohydrate (glucose), and even high-charge density salt (K3PO4). The ternary phase diagrams were determined, stressing that FILs highly increased the ability for ABS formation. The functionalized ABSs (FILs vs. mere fluoro-containing ILs) were used to extract lysozyme (Lys). The ABSs' biphasic regions were screened in terms of protein biocompatibility, analyzing the impact of ABS phase-forming components in Lys by UV-VIS spectrophotometry, CD spectroscopy, fluorescence spectroscopy, DSC, and enzyme assay. Lys partition behavior was characterized in terms of extraction efficiency (% EE). The structure, stability, and function of Lys were maintained or improved throughout the extraction step, as evaluated by CD spectroscopy, DSC, enzyme assay, and SDS-PAGE. Overall, FIL-based ABSs are more versatile and amenable to being tuned by the adequate choice of the phase-forming components and selecting the enriched phase. Binding studies between Lys and ABS phase-forming components were attained by MST, demonstrating the strong interaction between Lys and FILs aggregates. Two of the FIL-based ABSs (30 %wt [C2C1Im][C4F9SO3] + 2 %wt K3PO4 and 30 %wt [C2C1Im][C4F9SO3] + 25 %wt sucrose) allowed the simultaneous purification of Lys and BSA in a single ABS extraction step with high yield (extraction efficiency up to 100%) for both proteins. The purity of both recovered proteins was validated by SDS-PAGE analysis. Even with a high-charge density salt, the FIL-based ABSs developed in this work seem more amenable to be tuned. Lys and BSA were purified through selective partition to opposite phases in a single FIL-based ABS extraction step. FIL-based ABSs are proposed as an improved extraction step for proteins, based on their biocompatibility, customizable properties, and selectivity.
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Affiliation(s)
| | | | | | - João M. M. Araújo
- LAQV, REQUIMTE, Department of Chemistry, NOVA School of Science and Technology, NOVA University Lisbon, 2829-516 Caparica, Portugal; (S.F.C.); (M.H.C.); (A.B.P.)
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2
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Bharmoria P, Tietze AA, Mondal D, Kang TS, Kumar A, Freire MG. Do Ionic Liquids Exhibit the Required Characteristics to Dissolve, Extract, Stabilize, and Purify Proteins? Past-Present-Future Assessment. Chem Rev 2024; 124:3037-3084. [PMID: 38437627 PMCID: PMC10979405 DOI: 10.1021/acs.chemrev.3c00551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 02/08/2024] [Accepted: 02/19/2024] [Indexed: 03/06/2024]
Abstract
Proteins are highly labile molecules, thus requiring the presence of appropriate solvents and excipients in their liquid milieu to keep their stability and biological activity. In this field, ionic liquids (ILs) have gained momentum in the past years, with a relevant number of works reporting their successful use to dissolve, stabilize, extract, and purify proteins. Different approaches in protein-IL systems have been reported, namely, proteins dissolved in (i) neat ILs, (ii) ILs as co-solvents, (iii) ILs as adjuvants, (iv) ILs as surfactants, (v) ILs as phase-forming components of aqueous biphasic systems, and (vi) IL-polymer-protein/peptide conjugates. Herein, we critically analyze the works published to date and provide a comprehensive understanding of the IL-protein interactions affecting the stability, conformational alteration, unfolding, misfolding, and refolding of proteins while providing directions for future studies in view of imminent applications. Overall, it has been found that the stability or purification of proteins by ILs is bispecific and depends on the structure of both the IL and the protein. The most promising IL-protein systems are identified, which is valuable when foreseeing market applications of ILs, e.g., in "protein packaging" and "detergent applications". Future directions and other possibilities of IL-protein systems in light-harvesting and biotechnology/biomedical applications are discussed.
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Affiliation(s)
- Pankaj Bharmoria
- CICECO
- Aveiro Institute of Materials, Chemistry Department, University of Aveiro, 3810-193 Aveiro, Portugal
- Department
of Smart Molecular, Inorganic and Hybrid Materials, Institute of Materials Science of Barcelona (ICMAB-CSIC), 08193 Bellaterra, Barcelona, Spain
- Department
of Chemistry and Molecular Biology, Wallenberg Centre for Molecular
and Translational Medicine, University of
Gothenburg, SE-412 96 Göteborg, Sweden
| | - Alesia A. Tietze
- Department
of Chemistry and Molecular Biology, Wallenberg Centre for Molecular
and Translational Medicine, University of
Gothenburg, SE-412 96 Göteborg, Sweden
| | - Dibyendu Mondal
- CICECO
- Aveiro Institute of Materials, Chemistry Department, University of Aveiro, 3810-193 Aveiro, Portugal
- Institute
of Plant Genetics (IPG), Polish Academy of Sciences, Strzeszyńska 34, 60-479 Poznań, Poland
- Centre
for Nano and Material Sciences, JAIN (Deemed-to-be
University), Jain Global
Campus, Bangalore 562112, India
| | - Tejwant Singh Kang
- Department
of Chemistry, UGC Center for Advance Studies-II,
Guru Nanak Dev University (GNDU), Amritsar 143005, Punjab, India
| | - Arvind Kumar
- Salt
and Marine Chemicals Division, CSIR-Central
Salt and Marine Chemicals Research Institute, G. B. Marg, Bhavnagar 364002, Gujarat, India
| | - Mara G Freire
- CICECO
- Aveiro Institute of Materials, Chemistry Department, University of Aveiro, 3810-193 Aveiro, Portugal
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Veríssimo NVP, Mussagy CU, Bento HBS, Pereira JFB, Santos-Ebinuma VDC. Ionic liquids and deep eutectic solvents for the stabilization of biopharmaceuticals: A review. Biotechnol Adv 2024; 71:108316. [PMID: 38199490 DOI: 10.1016/j.biotechadv.2024.108316] [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: 08/16/2023] [Revised: 01/04/2024] [Accepted: 01/05/2024] [Indexed: 01/12/2024]
Abstract
Biopharmaceuticals have allowed the control of previously untreatable diseases. However, their low solubility and stability still hinder their application, transport, and storage. Hence, researchers have applied different compounds to preserve and enhance the delivery of biopharmaceuticals, such as ionic liquids (ILs) and deep eutectic solvents (DESs). Although the biopharmaceutical industry can employ various substances for enhancing formulations, their effect will change depending on the properties of the target biomolecule and environmental conditions. Hence, this review organized the current state-of-the-art on the application of ILs and DESs to stabilize biopharmaceuticals, considering the properties of the biomolecules, ILs, and DESs classes, concentration range, types of stability, and effect. We also provided a critical discussion regarding the potential utilization of ILs and DESs in pharmaceutical formulations, considering the restrictions in this field, as well as the advantages and drawbacks of these substances for medical applications. Overall, the most applied IL and DES classes for stabilizing biopharmaceuticals were cholinium-, imidazolium-, and ammonium-based, with cholinium ILs also employed to improve their delivery. Interestingly, dilute and concentrated ILs and DESs solutions presented similar results regarding the stabilization of biopharmaceuticals. With additional investigation, ILs and DESs have the potential to overcome current challenges in biopharmaceutical formulation.
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Affiliation(s)
- Nathalia Vieira Porphirio Veríssimo
- Department of Bioprocess Engineering and Biotechnology, School of Pharmaceutical Sciences, São Paulo State University, CEP: 14801-902 Araraquara, SP, Brazil; Department of Pharmaceutical Sciences, School of Pharmaceutical Sciences, São Paulo University, CEP: 14040-020 Ribeirão Preto, SP, Brazil.
| | - Cassamo Usemane Mussagy
- Escuela de Agronomía, Facultad de Ciencias Agronómicas y de los Alimentos, Pontificia Universidad Católica de Valparaíso, Quillota 2260000, Chile.
| | - Heitor Buzetti Simões Bento
- Department of Bioprocess Engineering and Biotechnology, School of Pharmaceutical Sciences, São Paulo State University, CEP: 14801-902 Araraquara, SP, Brazil.
| | | | - Valéria de Carvalho Santos-Ebinuma
- Department of Bioprocess Engineering and Biotechnology, School of Pharmaceutical Sciences, São Paulo State University, CEP: 14801-902 Araraquara, SP, Brazil.
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Rezanejade Bardajee G, Boraghi SA, Mahmoodian H, Rezanejad Z, Parhizkari K, Elmizadeh H. A salep biopolymer-based superporous hydrogel for ranitidine delivery: synthesis and characterization. JOURNAL OF POLYMER RESEARCH 2023. [DOI: 10.1007/s10965-023-03436-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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5
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Solution behavior of native and denatured beta lactoglobulin in presence of pyridinium based ionic liquids: A biophysical perspective of folding and refolding pattern of the protein. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.134448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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6
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Himani, Pratap Singh Raman A, Babu Singh M, Jain P, Chaudhary P, Bahadur I, Lal K, Kumar V, Singh P. An Update on Synthesis, Properties, Applications and Toxicity of the ILs. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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7
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Yadav N, Venkatesu P. Current understanding and insights towards protein stabilization and activation in deep eutectic solvents as sustainable solvent media. Phys Chem Chem Phys 2022; 24:13474-13509. [PMID: 35640592 DOI: 10.1039/d2cp00084a] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Deep eutectic solvents (DESs) have emerged as a new class of green, designer and biocompatible solvents, an alternative to conventional organic solvents and ionic liquids (ILs) which are comparatively toxic and non-biodegradable. DESs are eutectic mixtures that are formed when a hydrogen bond acceptor (HBA) is mixed with a hydrogen bond donor (HBD) at particular molar ratios by mechanical grinding or under mild heating conditions. Very recently, these solvents have been the center of attention for researchers in biotechnology, biomedicine and various scientific applications. These environmentally benign solvents have a close analogy with ILs; however, they offer certain unique merits over traditional ILs. DESs display remarkable properties such as easy preparation, tunable composition, biodegradability, recyclability, inherently low toxicity, sustainability and biocompatibility; these special features validate DESs as new potential solvents/co-solvents for biomolecules. Mechanistically, the biocompatibility and protein friendly nature of DESs depend on various factors, which include the composition of the DES, viscosity and hydration level. Therefore, it becomes an essential task to bring together all the studies related to protein behaviour in DESs to unlock their biomolecular proficiency. This review specifically highlights recent insights into the biomacromolecular functionality in DESs, including outlines of the solubilization and stabilization of proteins, long term protein packaging, different extraction methods and enzyme activation in the presence of DESs. A literature survey reveals that DESs act as green media in which the protein structure and activity are retained. In some cases, proteins refolded and enzymatic activity was enhanced several fold in the presence of DESs. Furthermore, we have reviewed the possible mechanistic behaviour behind protein stabilization, refolding and activation in DESs. Overall, the main objective of this review is to explicate the advantages of the introduction of DESs for biomolecules and to demonstrate the versatility of these eco-friendly solvents for future bio-based applications.
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Affiliation(s)
- Niketa Yadav
- Department of Chemistry, University of Delhi, Delhi-110 007, India.
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8
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Guncheva M. Role of ionic liquids on stabilization of therapeutic proteins and model proteins. Protein J 2022; 41:369-380. [PMID: 35661292 DOI: 10.1007/s10930-022-10058-5] [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] [Accepted: 05/24/2022] [Indexed: 11/26/2022]
Abstract
Ionic liquids (ILs) exhibit potential as excipients to stabilize proteins in solutions. This mini-review is not a detailed reference book on ILs, rather a brief overview of the main achievements published in the literature on their effect on protein aggregation, unfolding, structural and thermal stability, and activity. The main focus of the manuscript is three widely studied groups of ionic liquids: imidazolium-, cholinium- and alkylammonium-based and their effect on the model and therapeutic proteins.
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Affiliation(s)
- Maya Guncheva
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev Str. 9, 1113, Sofia, Bulgaria.
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9
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Li R, Liu Z, Jiang F, Zhao Y, Yang G, Hong L. Enhancement of thermal stability of proteinase K by biocompatible cholinium-based ionic liquids. Phys Chem Chem Phys 2022; 24:13057-13065. [PMID: 35583879 DOI: 10.1039/d1cp04782e] [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
Proteinase K (PK) is a proteolytic enzyme that has been widely used in nucleic acid purification, leather production, environmental protection, and other industrial applications. However, this biocatalyst cannot tolerate high temperatures which has severely restricted its wider application. As reported in previous studies, cholinium-based ionic liquids (ILs) have gained tremendous attention serving as a promising media to stabilize and preserve proteins, DNA, and other biomolecules due to their environmentally benign nature and biocompatibility. In this work, we chose 13 different kinds of cholinium-based ILs to examine their effects on the thermal stability and enzymatic activity of PK. We found that biocompatible cholinium-based ions with appropriately chosen anions can greatly improve the thermal stability of PK, whose melting temperature (Tm) is increased from ∼74.4 °C to 87.7 °C. However, the enzymatic activity is slightly reduced in the presence of ILs. Further comparison of our results with other literature findings suggests that kosmotropic anions of cholinium-based ILs are crucial to maintain the thermal stability of proteins. However, to achieve the best performance, the choice of IL anions is protein specific.
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Affiliation(s)
- Rui Li
- School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China. .,Institute of Natural Sciences, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Zhuo Liu
- Institute of Natural Sciences, Shanghai Jiao Tong University, Shanghai 200240, China.,Shanghai National Center for Applied Mathematics (SJTU center), MOE-LSC, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Fan Jiang
- School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China. .,Institute of Natural Sciences, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yang Zhao
- Institute of Biothermal Science and Technology, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Guangyu Yang
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China.
| | - Liang Hong
- School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China. .,Institute of Natural Sciences, Shanghai Jiao Tong University, Shanghai 200240, China.,Shanghai National Center for Applied Mathematics (SJTU center), MOE-LSC, Shanghai Jiao Tong University, Shanghai 200240, China
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10
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Lee PY, Singh O, Bermudez H, Matysiak S. Recovery of enzyme structure and activity following rehydration from ionic liquid. Phys Chem Chem Phys 2022; 24:10365-10372. [PMID: 35438103 DOI: 10.1039/d2cp00608a] [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
Long-term preservation of proteins at room temperature continues to be a major challenge. Towards using ionic liquids (ILs) to address this challenge, here we present a combination of experiments and simulations to investigate changes in lysozyme upon rehydration from IL mixtures using two imidazolium-based ILs (1-ethyl-3-methylimidazolium ethylsulfate, [EMIM][EtSO4] and 1-ethyl-3-methylimidazolium diethylphosphate, [EMIM][Et2PO4]). Various spectroscopic experiments and molecular dynamics simulations are performed to ascertain the structure and activity of lysozyme. Circular dichroism spectroscopy confirms that lysozyme maintains its secondary structure upon rehydration, even after 295 days. Increasing the IL concentration decreases the activity of lysozyme and is ultimately quenched at sufficiently high IL concentrations, but the rehydration of lysozyme from high IL concentrations completely restores its activity. Such rehydration occurs in the most common lysozyme activity assay, but without careful attention, this effect on the IL concentration can be overlooked. From simulations we observe occupation of [EMIM+] ions near the vicinity of the active site and the ligand-lysozyme complex is less stable in the presence of ILs, which results in the reduction of lysozyme activity. Upon rehydration, fast leaving of [EMIM+] is observed and the availability of active site is restored. In addition, suppression of structural fluctuations is also observed when in high IL concentrations, which also explains the decrease of activity. This structure suppression is recovered after undergoing rehydration. The return of native protein structure and activity indicates that after rehydration lysozyme returns to its original state. Our results also suggest a simple route to protein recovery following extended storage.
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Affiliation(s)
- Pei-Yin Lee
- Chemical Physics Program, Institute for Physical Science and Technology, University of Maryland, College Park, USA
| | - Onkar Singh
- Department of Polymer Science and Engineering, University of Massachusetts, Amherst, MA, USA.
| | - Harry Bermudez
- Department of Polymer Science and Engineering, University of Massachusetts, Amherst, MA, USA.
| | - Silvina Matysiak
- Fischell Department of Bioengineering, University of Maryland, College Park, USA.
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11
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Ionic Liquids: Promising Approach for Oral Drug Delivery. Pharm Res 2022; 39:2353-2365. [PMID: 35449344 DOI: 10.1007/s11095-022-03260-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Accepted: 04/06/2022] [Indexed: 12/22/2022]
Abstract
Oral administration is the most preferred route for drug administration in clinic. However, due to unsatisfactory physicochemical properties of drugs and various physiological barriers, the oral bioavailability of most poorly water-soluble and macromolecules drugs is low and the therapeutic effect is unsatisfactory. Ionic liquids (ILs), molten salts with unique properties, show amazing potential for oral delivery. In addition to being able to form active pharmaceutical ingredients based ILs (API-ILs) to overcome drug solubility and polymorphism issues, ILs have also been used to enhance the solubility of poorly soluble drugs, enhance drug stability in the gastrointestinal environment, improve drug permeability in intestinal mucus, and facilitate drug penetration across the intestinal epithelial barrier. Furthermore, ILs were attempted as formulation components to develop novel oral drug delivery systems. This review focus on the application progress of ILs in oral drug delivery and the mechanisms. The challenges and perspectives of the development of ILs-based oral delivery systems are also discussed. This article reviews the latest advances of ionic liquids for oral drug delivery, focusing on the application and related mechanisms of ionic liquids in improving the drug physicochemical properties and enhancing drug delivery across physiological barriers.
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12
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Intermolecular interactions between imidazolium- and cholinium-based ionic liquids and lysozyme: Regularities and peculiarities. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.118426] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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13
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Imam HT, Krasňan V, Rebroš M, Marr AC. Applications of Ionic Liquids in Whole-Cell and Isolated Enzyme Biocatalysis. Molecules 2021; 26:4791. [PMID: 34443378 PMCID: PMC8399596 DOI: 10.3390/molecules26164791] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 08/04/2021] [Accepted: 08/05/2021] [Indexed: 11/16/2022] Open
Abstract
Ionic liquids have unique chemical properties that have fascinated scientists in many fields. The effects of adding ionic liquids to biocatalysts are many and varied. The uses of ionic liquids in biocatalysis include improved separations and phase behaviour, reduction in toxicity, and stabilization of protein structures. As the ionic liquid state of the art has progressed, concepts of what can be achieved in biocatalysis using ionic liquids have evolved and more beneficial effects have been discovered. In this review ionic liquids for whole-cell and isolated enzyme biocatalysis will be discussed with an emphasis on the latest developments, and a look to the future.
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Affiliation(s)
- Hasan Tanvir Imam
- School of Chemistry and Chemical Engineering, Queen’s University Belfast, David Keir Building, Stranmillis Road, Belfast BT9 5AG, UK;
| | - Vladimír Krasňan
- Institute of Biotechnology, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, 812 37 Bratislava, Slovakia;
| | - Martin Rebroš
- Institute of Biotechnology, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, 812 37 Bratislava, Slovakia;
| | - Andrew Craig Marr
- School of Chemistry and Chemical Engineering, Queen’s University Belfast, David Keir Building, Stranmillis Road, Belfast BT9 5AG, UK;
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El Harrar T, Frieg B, Davari MD, Jaeger KE, Schwaneberg U, Gohlke H. Aqueous ionic liquids redistribute local enzyme stability via long-range perturbation pathways. Comput Struct Biotechnol J 2021; 19:4248-4264. [PMID: 34429845 PMCID: PMC8355836 DOI: 10.1016/j.csbj.2021.07.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Revised: 07/05/2021] [Accepted: 07/06/2021] [Indexed: 01/25/2023] Open
Abstract
Ionic liquids (IL) and aqueous ionic liquids (aIL) are attractive (co-)solvents for biocatalysis due to their unique properties. On the other hand, the incubation of enzymes in IL or aIL often reduces enzyme activity. Recent studies proposed various aIL-induced effects to explain the reduction, classified as direct effects, e.g., local dehydration or competitive inhibition, and indirect effects, e.g., structural perturbations or disturbed catalytic site integrity. However, the molecular origin of indirect effects has largely remained elusive. Here we show by multi-μs long molecular dynamics simulations, free energy computations, and rigidity analyses that aIL favorably interact with specific residues of Bacillus subtilis Lipase A (BsLipA) and modify the local structural stability of this model enzyme by inducing long-range perturbations of noncovalent interactions. The perturbations percolate over neighboring residues and eventually affect the catalytic site and the buried protein core. Validation against a complete experimental site saturation mutagenesis library of BsLipA (3620 variants) reveals that the residues of the perturbation pathways are distinguished sequence positions where substitutions highly likely yield significantly improved residual activity. Our results demonstrate that identifying these perturbation pathways and specific IL ion-residue interactions there effectively predicts focused variant libraries with improved aIL tolerance.
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Affiliation(s)
- Till El Harrar
- Institute of Biotechnology, RWTH Aachen University, 52074 Aachen, Germany
- John-von-Neumann-Institute for Computing (NIC), Jülich Supercomputing Centre (JSC), Institute of Biological Information Processing (IBI-7: Structural Biochemistry), and Institute of Bio- and Geosciences (IBG-4: Bioinformatics), Forschungszentrum Jülich GmbH, 52428 Jülich, Germany
| | - Benedikt Frieg
- John-von-Neumann-Institute for Computing (NIC), Jülich Supercomputing Centre (JSC), Institute of Biological Information Processing (IBI-7: Structural Biochemistry), and Institute of Bio- and Geosciences (IBG-4: Bioinformatics), Forschungszentrum Jülich GmbH, 52428 Jülich, Germany
| | - Mehdi D. Davari
- Institute of Biotechnology, RWTH Aachen University, 52074 Aachen, Germany
| | - Karl-Erich Jaeger
- Institute of Molecular Enzyme Technology, Heinrich Heine University Düsseldorf, 52428 Jülich, Germany
- Institute of Bio- and Geosciences IBG-1: Biotechnology, Forschungszentrum Jülich GmbH, 52428 Jülich, Germany
| | - Ulrich Schwaneberg
- Institute of Biotechnology, RWTH Aachen University, 52074 Aachen, Germany
- DWI – Leibniz Institute for Interactive Materials e.V., 52074 Aachen, Germany
| | - Holger Gohlke
- John-von-Neumann-Institute for Computing (NIC), Jülich Supercomputing Centre (JSC), Institute of Biological Information Processing (IBI-7: Structural Biochemistry), and Institute of Bio- and Geosciences (IBG-4: Bioinformatics), Forschungszentrum Jülich GmbH, 52428 Jülich, Germany
- Institute for Pharmaceutical and Medicinal Chemistry, Heinrich Heine University Düsseldorf, 40225 Düsseldorf, Germany
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15
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Deepa PR, Nalini V, Surianarayanan M, Krishnakumar S. Towards safer non-volatile tissue fixatives: Evaluation of choline-based ionic liquids for fixing ocular tissues. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 209:111777. [PMID: 33352431 DOI: 10.1016/j.ecoenv.2020.111777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 11/19/2020] [Accepted: 12/06/2020] [Indexed: 06/12/2023]
Abstract
Volatile organic chemicals (VOCs) are routinely used for processing biological tissue samples in clinical laboratories. Recognizing their serious health and environmental impacts, a few non-volatile green solvents (choline based ionic liquids, ILs) were evaluated as tissue fixatives here. Microscopic evaluation of histo-morphology, fixation and staining quality, and macromolecular integrity (DNA and proteins) were assessed in human eye tissues (sclera, choroid, retinal layers and retinal pigmented epithelium, eyelid and orbit) after IL-fixation. Formalin-fixed tissues were used as standard reference. Microscopic examination revealed favorable histomorphology, tissue fixation and staining characteristics in most tissues immersed in ILs. Time taken to fix, and stability over a period of time (24 h, 48 h, 1 week, 1 month) was also recorded. Electrophoretic analysis revealed stability of cellular proteins and nucleic acids in IL-fixed scleral tissues. Heterogeneity in tissue fixation property relative to the type of ocular tissue, duration of fixation and storage, warrant further design and optimization of ILs to fix biological tissues. The simple cholinium salts based ILs tested here show favorable potential for tissue fixation application, and as an alternative approach to the use of VOCs, towards sustainable biomedical practice.
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Affiliation(s)
- P R Deepa
- Department of Biological Sciences, Birla Institute of Technology & Science (BITS), Pilani 333 031, Rajasthan, India.
| | - V Nalini
- Department of Biological Sciences, Birla Institute of Technology & Science (BITS), Pilani 333 031, Rajasthan, India; L&T Department of Ocular Pathology, Kamalnayan Bajaj Institute for Research in Vision and Ophthalmology, Vision Research Foundation, Sankara Nethralaya, 18, College Road, 600 006 Chennai, India
| | - M Surianarayanan
- Cell for Industrial Safety and Risk Analysis (CISRA), Central Leather Research Institute (CSIR-CLRI), Adyar, Chennai, India
| | - S Krishnakumar
- L&T Department of Ocular Pathology, Kamalnayan Bajaj Institute for Research in Vision and Ophthalmology, Vision Research Foundation, Sankara Nethralaya, 18, College Road, 600 006 Chennai, India.
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17
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Kumari P, Kumari M, Kashyap HK. How Pure and Hydrated Reline Deep Eutectic Solvents Affect the Conformation and Stability of Lysozyme: Insights from Atomistic Molecular Dynamics Simulations. J Phys Chem B 2020; 124:11919-11927. [DOI: 10.1021/acs.jpcb.0c09873] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Pratibha Kumari
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Monika Kumari
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Hemant K. Kashyap
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
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18
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Han Q, Smith KM, Darmanin C, Ryan TM, Drummond CJ, Greaves TL. Lysozyme conformational changes with ionic liquids: Spectroscopic, small angle x-ray scattering and crystallographic study. J Colloid Interface Sci 2020; 585:433-443. [PMID: 33109332 DOI: 10.1016/j.jcis.2020.10.024] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 09/19/2020] [Accepted: 10/07/2020] [Indexed: 01/14/2023]
Abstract
Solvents that support protein functionality are important for biochemical applications, and new solvents are required. Here we employ FTIR and fluorescence spectroscopies, small angle X-ray scattering (SAXS) and X-ray crystallography to understand conformational changes of lysozyme with ionic liquids (ILs) added. Spectroscopic techniques identified that the secondary structure of lysozyme was maintained at the lower IL concentrations of 1 and 5 mol%, though the Tryptophan environment was significantly altered with nitrate-based ILs present. SAXS experiments indicated that the radius of gyration of lysozyme increased with 1 mol% IL present, and then decreased with increasing IL concentrations. The tertiary structure, particularly the loop regions, changed as a function of IL concentration, and this depended on the IL type. The crystallographic structure of lysozyme with the IL of ethylammonium nitrate present confirmed the loop region was extended, and identified three specific binding sites with nitrate ions, and that the positively charged areas were IL sensitive regions. This work provides a detailed understanding of lysozyme conformational changes in the presence of ILs. This approach can be extended to other functionally-important proteins.
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Affiliation(s)
- Qi Han
- School of Science, College of Science, Engineering and Health, RMIT University, 124 La Trobe Street, Melbourne, VIC 3000, Australia
| | - Kate M Smith
- Australian Synchrotron, Australian Nuclear Science and Technology Organisation, 800 Blackburn Road, Clayton, VIC, 3168, Australia
| | - Connie Darmanin
- ARC Centre of Excellence in Advanced Molecular Imaging, Department of Chemistry and Physics, La Trobe Institute for Molecular Sciences, La Trobe University, VIC 3086, Australia
| | - Timothy M Ryan
- Australian Synchrotron, Australian Nuclear Science and Technology Organisation, 800 Blackburn Road, Clayton, VIC, 3168, Australia
| | - Calum J Drummond
- School of Science, College of Science, Engineering and Health, RMIT University, 124 La Trobe Street, Melbourne, VIC 3000, Australia
| | - Tamar L Greaves
- School of Science, College of Science, Engineering and Health, RMIT University, 124 La Trobe Street, Melbourne, VIC 3000, Australia.
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19
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Abskharon R, Seidler PM, Sawaya MR, Cascio D, Yang TP, Philipp S, Williams CK, Newell KL, Ghetti B, DeTure MA, Dickson DW, Vinters HV, Felgner PL, Nakajima R, Glabe CG, Eisenberg DS. Crystal structure of a conformational antibody that binds tau oligomers and inhibits pathological seeding by extracts from donors with Alzheimer's disease. J Biol Chem 2020; 295:10662-10676. [PMID: 32493775 DOI: 10.1074/jbc.ra120.013638] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 05/29/2020] [Indexed: 11/06/2022] Open
Abstract
Soluble oligomers of aggregated tau accompany the accumulation of insoluble amyloid fibrils, a histological hallmark of Alzheimer disease (AD) and two dozen related neurodegenerative diseases. Both oligomers and fibrils seed the spread of Tau pathology, and by virtue of their low molecular weight and relative solubility, oligomers may be particularly pernicious seeds. Here, we report the formation of in vitro tau oligomers formed by an ionic liquid (IL15). Using IL15-induced recombinant tau oligomers and a dot blot assay, we discovered a mAb (M204) that binds oligomeric tau, but not tau monomers or fibrils. M204 and an engineered single-chain variable fragment (scFv) inhibited seeding by IL15-induced tau oligomers and pathological extracts from donors with AD and chronic traumatic encephalopathy. This finding suggests that M204-scFv targets pathological structures that are formed by tau in neurodegenerative diseases. We found that M204-scFv itself partitions into oligomeric forms that inhibit seeding differently, and crystal structures of the M204-scFv monomer, dimer, and trimer revealed conformational differences that explain differences among these forms in binding and inhibition. The efficiency of M204-scFv antibodies to inhibit the seeding by brain tissue extracts from different donors with tauopathies varied among individuals, indicating the possible existence of distinct amyloid polymorphs. We propose that by binding to oligomers, which are hypothesized to be the earliest seeding-competent species, M204-scFv may have potential as an early-stage diagnostic for AD and tauopathies, and also could guide the development of promising therapeutic antibodies.
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Affiliation(s)
- Romany Abskharon
- Departments of Chemistry and Biochemistry and Biological Chemistry, UCLA-DOE Institute UCLA, Los Angeles, California, USA.,Howard Hughes Medical Institute UCLA, Los Angeles, California, USA
| | - Paul M Seidler
- Departments of Chemistry and Biochemistry and Biological Chemistry, UCLA-DOE Institute UCLA, Los Angeles, California, USA.,Howard Hughes Medical Institute UCLA, Los Angeles, California, USA
| | - Michael R Sawaya
- Departments of Chemistry and Biochemistry and Biological Chemistry, UCLA-DOE Institute UCLA, Los Angeles, California, USA.,Howard Hughes Medical Institute UCLA, Los Angeles, California, USA
| | - Duilio Cascio
- Departments of Chemistry and Biochemistry and Biological Chemistry, UCLA-DOE Institute UCLA, Los Angeles, California, USA.,Howard Hughes Medical Institute UCLA, Los Angeles, California, USA
| | - Tianxiao P Yang
- Departments of Chemistry and Biochemistry and Biological Chemistry, UCLA-DOE Institute UCLA, Los Angeles, California, USA.,Howard Hughes Medical Institute UCLA, Los Angeles, California, USA
| | - Stephan Philipp
- Department of Molecular Biology and Biochemistry, University of California, Irvine, California, USA
| | - Christopher Kazu Williams
- Department of Pathology & Laboratory Medicine, David Geffen School of Medicine at UCLA, Los Angeles, California, USA
| | - Kathy L Newell
- Department of Pathology and Laboratory Medicine, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Bernardino Ghetti
- Department of Pathology and Laboratory Medicine, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Michael A DeTure
- Department of Neuroscience, Mayo Clinic, Jacksonville, Florida, USA
| | - Dennis W Dickson
- Department of Neuroscience, Mayo Clinic, Jacksonville, Florida, USA
| | - Harry V Vinters
- Department of Pathology & Laboratory Medicine, David Geffen School of Medicine at UCLA, Los Angeles, California, USA.,Department of Neurology, David Geffen School of Medicine at UCLA, Los Angeles, California, USA
| | - Philip L Felgner
- Vaccine Research and Development Center, Department of Physiology and Biophysics, University of California Irvine, Irvine, California, USA
| | - Rie Nakajima
- Vaccine Research and Development Center, Department of Physiology and Biophysics, University of California Irvine, Irvine, California, USA
| | - Charles G Glabe
- Department of Molecular Biology and Biochemistry, University of California, Irvine, California, USA
| | - David S Eisenberg
- Departments of Chemistry and Biochemistry and Biological Chemistry, UCLA-DOE Institute UCLA, Los Angeles, California, USA .,Howard Hughes Medical Institute UCLA, Los Angeles, California, USA
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20
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Saha S, Sannigrahi A, Chattopadhyay K, Chowdhury J. Interaction of KMP-11 and its mutants with ionic liquid choline dihydrogen phosphate: Multispectroscopic studies aided by docking and molecular dynamics simulations. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.112475] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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21
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Morimitsu Y, Matsuno H, Ohta N, Sekiguchi H, Takahara A, Tanaka K. Mechanical Stabilization of Deoxyribonucleic Acid Solid Films Based on Hydrated Ionic Liquid. Biomacromolecules 2020; 21:464-471. [PMID: 31800230 DOI: 10.1021/acs.biomac.9b01207] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Solid films of deoxyribonucleic acid (DNA) containing a hydrated ionic liquid, choline dihydrogen phosphate (CDP), were prepared by a solvent-casting method. Thermal properties, aggregation structure, thermal molecular motion, and tensile properties of CDP-containing DNA films were examined by thermogravimetry (TG), wide-angle X-ray diffraction (WAXD) measurement, dynamic mechanical analysis (DMA), and tensile tests, respectively. The water retentivity of the films at room temperature was much improved with CDP. The packing density of DNA helical chains clearly depended on the amount of CDP in the film. A small amount of CDP contributed to the suppression of the BI → BII conformational transition and the cooperative motion of the DNA duplex in the film. The tensile properties of the film drastically changed in the presence of CDP. When the amount of hydrated CDP in the film increased, the mechanical response of the film changed from glassy-like to rubbery-like via a semicrystalline-like state. The above results make it clear that CDP plays two major roles as a water absorber and plasticizer in the DNA film. Thus, it can be concluded that the use of an ionic liquid as an additive significantly increases the possibility of using a DNA solid film as a structural material.
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Affiliation(s)
| | | | - Noboru Ohta
- Japan Synchrotron Radiation Research Institute (JASRI) , Sayo-cho , Hyogo 679-5198 , Japan
| | - Hiroshi Sekiguchi
- Japan Synchrotron Radiation Research Institute (JASRI) , Sayo-cho , Hyogo 679-5198 , Japan
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22
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Singh O, Lee PY, Matysiak S, Bermudez H. Dual mechanism of ionic liquid-induced protein unfolding. Phys Chem Chem Phys 2020; 22:19779-19786. [DOI: 10.1039/d0cp03138k] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Ionic liquids (ILs) are gaining attention as protein stabilizers and refolding additives.
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Affiliation(s)
- Onkar Singh
- Department of Polymer Science and Engineering
- University of Massachusetts
- Amherst
- USA
| | - Pei-Yin Lee
- Chemical Physics Program
- Institute for Physical Science and Technology
- University of Maryland
- College Park
- USA
| | - Silvina Matysiak
- Fischell Department of Bioengineering
- University of Maryland
- College Park
- USA
| | - Harry Bermudez
- Department of Polymer Science and Engineering
- University of Massachusetts
- Amherst
- USA
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23
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Wawer J, Kaczkowska E, Karczewski J, Olszewski M, Augustin-Nowacka D, Krakowiak J. Amyloid fibril formation in the presence of water structure-affecting solutes. Biophys Chem 2019; 254:106265. [PMID: 31669866 DOI: 10.1016/j.bpc.2019.106265] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Revised: 09/09/2019] [Accepted: 09/10/2019] [Indexed: 10/26/2022]
Abstract
The impact of the differently hydrated non-electrolytes (protein structure destabilizers) on the fibrillation of hen egg white lysozyme (HEWL) was investigated. Two isomeric urea derivatives i.e. butylurea (BU) and N,N,N',N'-tetramethylurea (TMU) were chosen as a tested compounds. The obtained results show that butylurea exerts greater impact on HEWL and its fibrillation than tetramethylurea. Both substances decrease the time of induction of the fibrillation (lag time) but only BU increases the efficiency of amyloidogenesis. For the systems with equivalent reduction of the HEWL stability (250mM BU and 500mM TMU) the not-equivalent increase of the protein fibrillation was recorded (higher for BU). This fact suggests that specific interactions with protein, possibly water mediated, are responsible for the action of the tested substances.
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Affiliation(s)
- Jarosław Wawer
- Department of Physical Chemistry, Faculty of Chemistry, Gdańsk University of Technology, Narutowicza Str. 11/12, 80-233 Gdańsk, Poland.
| | - Emilia Kaczkowska
- Department of Physical Chemistry, Faculty of Chemistry, Gdańsk University of Technology, Narutowicza Str. 11/12, 80-233 Gdańsk, Poland
| | - Jakub Karczewski
- Department of Solid State Physics, Faculty of Applied Physics and Mathematics, Gdańsk University of Technology, Narutowicza Str. 11/12, 80-233 Gdańsk, Poland
| | - Marcin Olszewski
- Department of Molecular Biotechnology and Microbiology, Faculty of Chemistry, Gdańsk University of Technology, Narutowicza Str. 11/12, 80-233 Gdańsk, Poland
| | | | - Joanna Krakowiak
- Department of Physical Chemistry, Faculty of Chemistry, Gdańsk University of Technology, Narutowicza Str. 11/12, 80-233 Gdańsk, Poland
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24
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Cheng K, Wu Q, Jiang L, Liu M, Li C. Protein stability analysis in ionic liquids by 19F NMR. Anal Bioanal Chem 2019; 411:4929-4935. [DOI: 10.1007/s00216-019-01804-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Revised: 02/24/2019] [Accepted: 03/25/2019] [Indexed: 01/16/2023]
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25
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Li D, Gao Y, Pan X, Wei D, Guo B, Yang C, Liu B. MD and DSC study of bioactive structural stability of insulin in various imidazolium ionic liquids. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.01.039] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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26
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Kumari M, Singh UK, Beg I, Alanazi AM, Khan AA, Patel R. Effect of cations and anions of ionic liquids on the stability and activity of lysozyme: Concentration and temperature effect. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.09.075] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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27
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Kumar PK, Bisht M, Venkatesu P, Bahadur I, Ebenso EE. Exploring the Effect of Choline-Based Ionic Liquids on the Stability and Activity of Stem Bromelain. J Phys Chem B 2018; 122:10435-10444. [DOI: 10.1021/acs.jpcb.8b08173] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | - Meena Bisht
- Department of Chemistry, University of Delhi, Delhi 110007, India
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28
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Reslan M, Ranganathan V, Macfarlane DR, Kayser V. Choline ionic liquid enhances the stability of Herceptin® (trastuzumab). Chem Commun (Camb) 2018; 54:10622-10625. [PMID: 30177986 DOI: 10.1039/c8cc06397d] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We investigated the effect of an emerging biocompatible ionic liquid, choline dihydrogen phosphate (CDHP), on the stability of high-concentration formulations of Herceptin® (trastuzumab). Our results show that CDHP significantly suppresses unfolding and aggregation of trastuzumab, demonstrating great promise as an additive in the development of stable therapeutic antibody formulations.
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Affiliation(s)
- Mouhamad Reslan
- School of Pharmacy, Faculty of Medicine and Health, The University of Sydney, 2006, Sydney, NSW, Australia.
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29
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30
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Plaza-Garrido M, Salinas-Garcia MC, Camara-Artigas A. Orthorhombic lysozyme crystallization at acidic pH values driven by phosphate binding. ACTA CRYSTALLOGRAPHICA SECTION D-STRUCTURAL BIOLOGY 2018; 74:480-489. [PMID: 29717719 DOI: 10.1107/s205979831800517x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Accepted: 04/02/2018] [Indexed: 11/10/2022]
Abstract
The structure of orthorhombic lysozyme has been obtained at 298 K and pH 4.5 using sodium chloride as the precipitant and in the presence of sodium phosphate at a concentration as low as 5 mM. Crystals belonging to space group P212121 (unit-cell parameters a = 30, b = 56, c = 73 Å, α = β = γ = 90.00°) diffracted to a resolution higher than 1 Å, and the high quality of these crystals permitted the identification of a phosphate ion bound to Arg14 and His15. The binding of this ion produces long-range conformational changes affecting the loop containing Ser60-Asn74. The negatively charged phosphate ion shields the electrostatic repulsion of the positively charged arginine and histidine residues, resulting in higher stability of the phosphate-bound lysozyme. Additionally, a low-humidity orthorhombic variant was obtained at pH 4.5, and comparison with those previously obtained at pH 6.5 and 9.5 shows a 1.5 Å displacement of the fifth α-helix towards the active-site cavity, which might be relevant to protein function. Since lysozyme is broadly used as a model protein in studies related to protein crystallization and amyloid formation, these results indicate that the interaction of some anions must be considered when analysing experiments performed at acidic pH values.
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Affiliation(s)
- Marina Plaza-Garrido
- Department of Chemistry and Physics, Agrifood Campus of International Excellence (ceiA3) and CIAMBITAL, University of Almería, Carretera de Sacramento, 04120 Almeria, Spain
| | - M Carmen Salinas-Garcia
- Department of Chemistry and Physics, Agrifood Campus of International Excellence (ceiA3) and CIAMBITAL, University of Almería, Carretera de Sacramento, 04120 Almeria, Spain
| | - Ana Camara-Artigas
- Department of Chemistry and Physics, Agrifood Campus of International Excellence (ceiA3) and CIAMBITAL, University of Almería, Carretera de Sacramento, 04120 Almeria, Spain
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31
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Takekiyo T, Yoshimura Y. Suppression and dissolution of amyloid aggregates using ionic liquids. Biophys Rev 2018; 10:853-860. [PMID: 29696571 DOI: 10.1007/s12551-018-0421-8] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Accepted: 04/08/2018] [Indexed: 12/22/2022] Open
Abstract
Amyloid aggregates are composed of protein fibrils with a dominant β-sheet structure, are water-insoluble, and are involved in the pathogenesis of many neurodegenerative diseases. Development of pharmaceuticals to treat these diseases and the design of recovery agents for amyloid-type inclusion bodies require the successful suppression and dissolution of such aggregates. Since ionic liquids (ILs) are composed of both a cation and anion and are known to suppress protein aggregation and to dissolve water-insoluble compounds such as cellulose; they may also have potential use as suppression/dissolution agents for amyloid aggregates. In the following review, we present the suppression and dissolution effects of ILs on amyloid aggregates so far reported. The protein-IL affinity (the ability of ILs to interact with amyloid proteins) was found to be the biochemical basis for ILs' suppression of amyloid formation, and the hydrogen-bonding basicity of ILs might be the basis for their ability to dissolve amyloid aggregates. These findings present the potential of ILs to serve as novel pharmaceuticals to treat neurodegenerative diseases and as recovery agents for various amyloid aggregates.
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Affiliation(s)
- Takahiro Takekiyo
- Department of Applied Chemistry, National Defense Academy, 1-10-20, Hashirimizu, Yokosuka, Kanagawa, 239-8686, Japan.
| | - Yukihiro Yoshimura
- Department of Applied Chemistry, National Defense Academy, 1-10-20, Hashirimizu, Yokosuka, Kanagawa, 239-8686, Japan
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32
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Reslan M, Kayser V. Ionic liquids as biocompatible stabilizers of proteins. Biophys Rev 2018; 10:781-793. [PMID: 29511969 DOI: 10.1007/s12551-018-0407-6] [Citation(s) in RCA: 76] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Accepted: 02/19/2018] [Indexed: 01/08/2023] Open
Abstract
Ionic liquids (ILs) have recently emerged as versatile solvents and additives in the field of biotechnology, particularly as stabilizers of proteins and enzymes. Of interest to the biotechnology industry is the formulation of stable biopharmaceuticals, therapeutic proteins, and vaccines which have revolutionized the treatment of many diseases including debilitating conditions such as cancers and auto-immune diseases. The stabilization of therapeutic proteins is typically achieved using additives that prevent unfolding and aggregation of these proteins during manufacture, transport, and long-term storage. To determine if ILs could be used in the formulation of stable therapeutic proteins, a thorough understanding of the effects of ILs on protein stability is needed, as well as understanding the toxicity of ILs on humans, and other considerations for formulation development such as viscosity and osmolality. In this review, we summarize recent developments on the stabilization of proteins and enzymes using ILs, with emphasis on identifying biocompatible ILs that may be suitable for the formulation of stable biopharmaceuticals in the future.
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Affiliation(s)
- Mouhamad Reslan
- Faculty of Pharmacy, The University of Sydney, Sydney, NSW, 2006, Australia
| | - Veysel Kayser
- Faculty of Pharmacy, The University of Sydney, Sydney, NSW, 2006, Australia.
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33
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Dagade DH, Barge SS. H-Bonding in Water of Hydration: NIR Spectral Studies of Hydration Behavior of 1-n
-Alkyl-3-metylimidazolium-Based Bromide and Amino Acid Ionic Liquids at 298.15 K. ChemistrySelect 2017. [DOI: 10.1002/slct.201702281] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Dilip H. Dagade
- Department of Chemistry; Shivaji University; Kolhapur - 416 004 INDIA
| | - Seema S. Barge
- Department of Chemistry; Shivaji University; Kolhapur - 416 004 INDIA
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34
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Synthesis and transport of impurities in electrodialysis metathesis: Production of choline dihydrogen phosphate. J Memb Sci 2017. [DOI: 10.1016/j.memsci.2017.07.042] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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35
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Takekiyo T, Yoshida K, Funahashi Y, Nagata S, Abe H, Yamaguchi T, Yoshimura Y. Helix-forming ability of proteins in alkylammonium nitrate. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.08.066] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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36
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Alves M, Vieira NSM, Rebelo LPN, Araújo JMM, Pereiro AB, Archer M. Fluorinated ionic liquids for protein drug delivery systems: Investigating their impact on the structure and function of lysozyme. Int J Pharm 2017; 526:309-320. [PMID: 28478279 DOI: 10.1016/j.ijpharm.2017.05.002] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Revised: 04/18/2017] [Accepted: 05/02/2017] [Indexed: 12/12/2022]
Abstract
Since the approval of recombinant human insulin by FDA in 1982, more than 200 proteins are currently available for pharmaceutical use to treat a wide range of diseases. However, innovation is still required to develop effective approaches for drug delivery. Our aim is to investigate the potential use of fluorinated ionic liquids (FILs) as drug delivery systems (DDS) for therapeutic proteins. Some initial parameters need to be assessed before further studies can proceed. This work evaluates the impact of FILs on the stability, function, structure and aggregation state of lysozyme. Different techniques were used for this purpose, which included differential scanning fluorimetry (DSF), spectrophotometric assays, circular dichroism (CD), dynamic light scattering (DLS), and scanning and transmission electron microscopy (SEM/TEM). Ionic liquids composed of cholinium-, imidazolium- or pyridinium- derivatives were combined with different anions and analysed at different concentrations in aqueous solutions (below and above the critical aggregation concentration, CAC). The results herein presented show that the addition of ionic liquids had no significant effect on the stability and hydrolytic activity of lysozyme. Moreover, a distinct behaviour was observed in DLS experiments for non-surfactant and surfactant ionic liquids, with the latter encapsulating the protein at concentrations above the CAC. These results encourage us to further study ionic liquids as promising tools for DDS of protein drugs.
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Affiliation(s)
- Márcia Alves
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa (ITQB NOVA), Avenida da República, 2780-157, Oeiras, Portugal; LAQV, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516, Caparica, Portugal
| | - Nicole S M Vieira
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa (ITQB NOVA), Avenida da República, 2780-157, Oeiras, Portugal; LAQV, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516, Caparica, Portugal
| | - Luís Paulo N Rebelo
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa (ITQB NOVA), Avenida da República, 2780-157, Oeiras, Portugal; LAQV, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516, Caparica, Portugal
| | - João M M Araújo
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa (ITQB NOVA), Avenida da República, 2780-157, Oeiras, Portugal; LAQV, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516, Caparica, Portugal
| | - Ana B Pereiro
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa (ITQB NOVA), Avenida da República, 2780-157, Oeiras, Portugal; LAQV, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516, Caparica, Portugal.
| | - Margarida Archer
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa (ITQB NOVA), Avenida da República, 2780-157, Oeiras, Portugal.
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37
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Kumar A, Bisht M, Venkatesu P. Biocompatibility of ionic liquids towards protein stability: A comprehensive overview on the current understanding and their implications. Int J Biol Macromol 2017; 96:611-651. [DOI: 10.1016/j.ijbiomac.2016.12.005] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Revised: 12/02/2016] [Accepted: 12/04/2016] [Indexed: 10/20/2022]
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38
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Sanchez-Fernandez A, Edler KJ, Arnold T, Alba Venero D, Jackson AJ. Protein conformation in pure and hydrated deep eutectic solvents. Phys Chem Chem Phys 2017; 19:8667-8670. [DOI: 10.1039/c7cp00459a] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Deep eutectic solvents as media for protein stabilisation: conformation in the absence and presence of water.
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Affiliation(s)
- A. Sanchez-Fernandez
- Department of Chemistry, University of Bath, Claverton Down
- Bath
- UK
- European Spallation Source
- Lund
| | - K. J. Edler
- Department of Chemistry, University of Bath, Claverton Down
- Bath
- UK
| | - T. Arnold
- Diamond Light Source, Harwell Campus
- Didcot
- UK
| | | | - A. J. Jackson
- European Spallation Source
- Lund
- Sweden
- Department of Physical Chemistry
- Lund University
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39
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Yoshimura Y, Takekiyo T, Mori T. Structural study of lysozyme in two ionic liquids at cryogenic temperature. Chem Phys Lett 2016. [DOI: 10.1016/j.cplett.2016.10.013] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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40
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Kumari M, Dohare N, Maurya N, Dohare R, Patel R. Effect of 1-methyl-3-octyleimmidazolium chloride on the stability and activity of lysozyme: a spectroscopic and molecular dynamics studies. J Biomol Struct Dyn 2016; 35:2016-2030. [DOI: 10.1080/07391102.2016.1204946] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Meena Kumari
- Biophysical Chemistry Laboratory, Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia (A Central University), New Delhi 110025, India
| | - Neeraj Dohare
- Biophysical Chemistry Laboratory, Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia (A Central University), New Delhi 110025, India
| | - Neha Maurya
- Biophysical Chemistry Laboratory, Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia (A Central University), New Delhi 110025, India
| | - Ravins Dohare
- Nonlinear Dynamic Laboratory, Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia (A Central University), New Delhi 110025, India
| | - Rajan Patel
- Biophysical Chemistry Laboratory, Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia (A Central University), New Delhi 110025, India
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41
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Falconer RJ. Applications of isothermal titration calorimetry - the research and technical developments from 2011 to 2015. J Mol Recognit 2016; 29:504-15. [PMID: 27221459 DOI: 10.1002/jmr.2550] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Revised: 04/05/2016] [Accepted: 04/14/2016] [Indexed: 12/12/2022]
Abstract
Isothermal titration calorimetry is a widely used biophysical technique for studying the formation or dissociation of molecular complexes. Over the last 5 years, much work has been published on the interpretation of isothermal titration calorimetry (ITC) data for single binding and multiple binding sites. As over 80% of ITC papers are on macromolecules of biological origin, this interpretation is challenging. Some researchers have attempted to link the thermodynamics constants to events at the molecular level. This review highlights work carried out using binding sites characterized using x-ray crystallography techniques that allow speculation about individual bond formation and the displacement of individual water molecules during ligand binding and link these events to the thermodynamic constants for binding. The review also considers research conducted with synthetic binding partners where specific binding events like anion-π and π-π interactions were studied. The revival of assays that enable both thermodynamic and kinetic information to be collected from ITC data is highlighted. Lastly, published criticism of ITC research from a physical chemistry perspective is appraised and practical advice provided for researchers unfamiliar with thermodynamics and its interpretation. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Robert J Falconer
- Department of Chemical and Biological Engineering, ChELSI Institute, University of Sheffield, Sheffield, S1 3JD, UK.
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42
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Strassburg S, Bermudez H, Hoagland D. Lysozyme Solubility and Conformation in Neat Ionic Liquids and Their Mixtures with Water. Biomacromolecules 2016; 17:2233-9. [PMID: 27159556 DOI: 10.1021/acs.biomac.6b00468] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The room temperature solubility of a number of model proteins is assessed for a diverse set of neat ionic liquids (ILs). For two soluble protein-IL pairs, lysozyme in [C2MIM][EtSO4] (1-ethyl-3-methylimidazolium ethylsulfate) and in [C2,4,4,4P][Et2PO4] (tributyl(ethyl)phosphonium diethylphosphate), protein solubility and structure at various temperatures are probed by dynamic light scattering (assessing dissolved molecular size), turbidimetry (reflecting degree of solubility), and Fourier transform infrared spectroscopy (uncovering helical secondary structure). As compared to aqueous environments, [C2,4,4,4P][Et2PO4] thermally stabilizes protein size and secondary structure while [C2MIM][EtSO4] does the opposite. Lysozyme denatured in [C2MIM][EtSO4] does not aggregate, presumably due to an absence of hydrophobic interactions, and the denaturation appears thermally reversible. Both ILs at room temperature are miscible with water in all proportions, but to create the corresponding ternary mixtures with protein, the order of mixing is important. Mixed to avoid additions of water to IL-dissolved protein, stable solutions are obtained with [C2MIM][EtSO4] at all solvent compositions. When water is added to IL-rich solutions, liquid-liquid demixing is noted.
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Affiliation(s)
- Stephen Strassburg
- Polymer Science and Engineering Department, University of Massachusetts-Amherst , Amherst, Massachusetts 01003, United States
| | - Harry Bermudez
- Polymer Science and Engineering Department, University of Massachusetts-Amherst , Amherst, Massachusetts 01003, United States
| | - David Hoagland
- Polymer Science and Engineering Department, University of Massachusetts-Amherst , Amherst, Massachusetts 01003, United States
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43
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Desai RK, Streefland M, Wijffels RH, Eppink MHM. Extraction of Proteins with ABS. GREEN CHEMISTRY AND SUSTAINABLE TECHNOLOGY 2016. [DOI: 10.1007/978-3-662-52875-4_6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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44
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Mehta A, Rao JR, Fathima NN. Electrostatic Forces Mediated by Choline Dihydrogen Phosphate Stabilize Collagen. J Phys Chem B 2015; 119:12816-27. [PMID: 26388068 DOI: 10.1021/acs.jpcb.5b07055] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Cross-linkers aid in improving biostability of collagen via different mechanisms. Choline dihydrogen phosphate (cDHP), a biocompatible ionic liquid, has been reported as a potential cross-linker for collagen. However, its mechanism is yet unclear. This study explores the effect of cDHP on the physicochemical stability of collagen and nature of its interaction. Dielectric behavior of collagen-cDHP composites signifies that cDHP enhances intermolecular forces. This was demonstrated by an increase in cross-linked groups and high denaturation temperature of collagen-cDHP composites. XRD measurements reveal minor conformational change in helices. Molecular modeling studies illustrate that the force existing between collagen and cDHP is electrostatic in nature. Herein, it is postulated that dihydrogen phosphate anion attaches to cationic functional groups of collagen, resulting in closer vicinity of various side chains of collagen, forming physical and chemical cross-links within collagen, contributing to its structural stability. Our study suggests that dihydrogen phosphate anions can be employed for developing a new class of biocompatible cross-linkers.
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Affiliation(s)
- Ami Mehta
- Chemical Laboratory, CSIR-Central Leather Research Institute , Adyar, Chennai 600020, India
| | - J Raghava Rao
- Chemical Laboratory, CSIR-Central Leather Research Institute , Adyar, Chennai 600020, India
| | - N Nishad Fathima
- Chemical Laboratory, CSIR-Central Leather Research Institute , Adyar, Chennai 600020, India
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45
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Taha M, Quental MV, Correia I, Freire MG, Coutinho JAP. Extraction and stability of bovine serum albumin (BSA) using cholinium-based Good's buffers ionic liquids. Process Biochem 2015; 50:1158-1166. [PMID: 28239260 DOI: 10.1016/j.procbio.2015.03.020] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Good's buffers ionic liquids (GB-ILs), composed of cholinium-based cations and Good's buffers anions, display self-buffering characteristics in the biological pH range, and their polarity and hydrophobicity can be easily tuned by a proper manipulation of their ions chemical structures. In this work, the extraction ability for bovine serum albumin (BSA) of aqueous biphasic systems (ABS) formed by polypropylene glycol 400 (PPG 400) and several GB-ILs was evaluated. ABS formed by PPG 400 and cholinium chloride ([Ch]Cl), GBs, and sucrose were also investigated for comparison purposes. It is shown that BSA preferentially migrates for the GB-IL-rich phase, with extraction efficiencies of 100%, achieved in a single-step. Dynamic light scattering, and circular dichroism (CD) and Fourier transform infrared (FTIR) spectroscopies were employed to evaluate the effect of the investigated cholinium-based GB-ILs on the BSA stability, and compared with results obtained for the respective GBs precursors, [Ch]Cl and sucrose, a well-known protein stabilizer. Molecular docking studies were also carried out to investigate on the binding sites of GB-IL ions to BSA. The experimental results confirm that BSA has a higher stability in GB-ILs than in any of the other compounds investigated.
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Affiliation(s)
- Mohamed Taha
- CICECO-Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Maria V Quental
- CICECO-Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Isabel Correia
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Mara G Freire
- 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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46
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Mazid RR, Divisekera U, Yang W, Ranganathan V, MacFarlane DR, Cortez-Jugo C, Cheng W. Biological stability and activity of siRNA in ionic liquids. Chem Commun (Camb) 2015; 50:13457-60. [PMID: 25232641 DOI: 10.1039/c4cc05086j] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
We report substantially enhanced biological stability of siRNA in a hydrated ionic liquid (IL) based on buffered choline dihydrogen phosphate (CDP). The results show that hydrated CDP IL substantially prolongs the shelf-life of siRNA for up to three months in the presence of RNase A. Remarkably, siRNA stored in the IL remained active and eGFP siRNA exhibited clear gene knockdown effects in eGFP-expressing HeLa cells.
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Affiliation(s)
- Romiza R Mazid
- Department of Chemical Engineering, Monash University, Clayton 3800, VIC, Australia.
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47
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Mazid RR, Cooper A, Zhang Y, Vijayaraghavan R, MacFarlane DR, Cortez-Jugo C, Cheng W. Enhanced enzymatic degradation resistance of plasmid DNA in ionic liquids. RSC Adv 2015. [DOI: 10.1039/c5ra05518k] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Buffered ionic liquids can substantially enhance enzymatic degradation resistance of plasmid DNA, indicating the potential to serve as next-generation biological storage buffer at ambient temperature.
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Affiliation(s)
- Romiza R. Mazid
- Department of Chemical Engineering
- Monash University Clayton
- Victoria
- Australia
| | - Alexandra Cooper
- Department of Chemical Engineering
- Monash University Clayton
- Victoria
- Australia
| | - Ying Zhang
- Department of Chemical Engineering
- Monash University Clayton
- Victoria
- Australia
| | | | | | - Christina Cortez-Jugo
- Monash Institute of Pharmaceutical Sciences
- Monash University Parkville
- Victoria 3052
- Australia
| | - Wenlong Cheng
- Department of Chemical Engineering
- Monash University Clayton
- Victoria
- Australia
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48
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Mazid RR, Vijayaraghavan R, MacFarlane DR, Cortez-Jugo C, Cheng W. Inhibited fragmentation of mAbs in buffered ionic liquids. Chem Commun (Camb) 2015; 51:8089-92. [DOI: 10.1039/c5cc01877c] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Choline-based buffered ionic liquids have been demonstrated to greatly inhibit enzymatic degradation of antibodies, and are promising as next-generation biological buffers.
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Affiliation(s)
- Romiza R. Mazid
- Department of Chemical Engineering
- Monash University
- Clayton 3800
- Australia
| | - R. Vijayaraghavan
- Monash Institute of Pharmaceutical Sciences
- Monash University
- Parkville 3052
- Australia
| | | | | | - Wenlong Cheng
- Department of Chemical Engineering
- Monash University
- Clayton 3800
- Australia
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49
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Qian LW, Hu XL, Guan P, Gao B, Wang D, Wang CL, Li J, Du CB, Song WQ. Thermal preparation of lysozyme-imprinted microspheres by using ionic liquid as a stabilizer. Anal Bioanal Chem 2014; 406:7221-31. [PMID: 25260404 DOI: 10.1007/s00216-014-8133-9] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Revised: 08/21/2014] [Accepted: 08/22/2014] [Indexed: 10/24/2022]
Abstract
Thermal preparation of lysozyme-imprinted microspheres was firstly investigated by using biocompatible ionic liquid (IL) as a thermal stabilizer. The imprinted microspheres made with IL could obtain the good recognition ability to template protein, whereas the imprinted polymer synthesized in the absence of it had a similar adsorption capacity to the non-imprinted one. Furthermore, the preparation conditions of imprinted polymers (MIPs) including the content of IL, temperature of polymerization, and types of functional monomers and crosslinkers were systematically analyzed via circular dichroism spectrum and activity assay. The results illustrated that using hydroxyethyl acrylate as the functional monomer, ethylene glycol dimethacrylate as the crosslinker, 5 % IL as the stabilizer, and 75 °C as the reaction temperature could retain the structure of template protein as much as possible. The obtained MIPs showed excellent recognition ability to the template protein with the separation factor and selectivity factor value of 4.30 and 2.21, respectively. Consequently, it is an effective way to accurately imprint and separate template protein by cooperatively using circular dichroism spectroscopy and activity assay during the preparation of protein MIPs. The method of utilizing IL to stabilizing protein at high temperature would offer a good opportunity for various technologies to improve the development of macromolecules imprinting.
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Affiliation(s)
- Li-Wei Qian
- School of Natural and Applied Science, Northwestern Polytechnical University, Xi'an, 710072, China,
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50
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Takekiyo T, Fukudome K, Yamazaki K, Abe H, Yoshimura Y. Protein aggregation and partial globular state in aqueous 1-alkyl-3-methylimidazolium nitrate solutions. Chem Phys Lett 2014. [DOI: 10.1016/j.cplett.2014.03.089] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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