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Hu W, Xiong Z, Meng X, Wu Y, Tong P, Gao J, Li X, Chen H. Lipid matrix-specific pretreatment method for enhancing the extractability and allergenicity maintenance of bovine milk allergens in ELISA detection. Food Chem 2024; 452:139462. [PMID: 38723563 DOI: 10.1016/j.foodchem.2024.139462] [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: 02/01/2024] [Revised: 04/21/2024] [Accepted: 04/21/2024] [Indexed: 06/01/2024]
Abstract
The presence of various components in the food matrix makes allergen detection difficult and inaccurate, and pretreatment is an innovative breakthrough point. Food matrices were categorised based on their composition. Subsequently, a pretreatment method was established using a combination of ultrasound-assisted n-hexane degreasing and weakly alkaline extraction systems to enhance the detection accuracy of bovine milk allergens. Results showed that more allergens were obtained with less structural destruction, as demonstrated using immunological quantification and spectral analysis. Concurrently, allergenicity preservation was confirmed through liquid chromatography-tandem mass spectrometry (LC-MS/MS) analysis, a KU812 cell degranulation model, and western blotting. The method exhibited good accuracy (bias, 8.47%), repeatability (RSDr, 1.52%), and stability (RSDR, 5.65%). In foods with high lipid content, such as chocolate, the allergen content was 2.29-fold higher than that of commercial kits. Laser confocal scanning microscopy (LCSM) and scanning electron microscopy (SEM) analyses revealed a significant decrease in fat content after post-pretreatment using our method. In addition, colloidal stability surpassed that achieved using commercial kits, as indicated through the PSA and zeta potential results. The results demonstrated the superiority of the extractability and allergenicity maintenance of lipid matrix-specific pretreatment methods for improving the accuracy of ELISA based allergen detection in real food.
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Affiliation(s)
- Wei Hu
- State Key Laboratory of Food Science and Resource, Nanchang University, Nanchang 330047, China; School of Food Science and Technology, Nanchang University, Nanchang 330031, China; Jiangxi Province Key Laboratory of Food Allergy, Nanchang 330047, China
| | - Ziyi Xiong
- State Key Laboratory of Food Science and Resource, Nanchang University, Nanchang 330047, China; School of Food Science and Technology, Nanchang University, Nanchang 330031, China; Jiangxi Province Key Laboratory of Food Allergy, Nanchang 330047, China
| | - Xuanyi Meng
- State Key Laboratory of Food Science and Resource, Nanchang University, Nanchang 330047, China; Jiangxi Province Key Laboratory of Food Allergy, Nanchang 330047, China; Sino-German Joint Research Institute, Nanchang University, Nanchang 330047, China
| | - Yong Wu
- State Key Laboratory of Food Science and Resource, Nanchang University, Nanchang 330047, China; Jiangxi Province Key Laboratory of Food Allergy, Nanchang 330047, China; Sino-German Joint Research Institute, Nanchang University, Nanchang 330047, China
| | - Ping Tong
- State Key Laboratory of Food Science and Resource, Nanchang University, Nanchang 330047, China; School of Food Science and Technology, Nanchang University, Nanchang 330031, China; Jiangxi Province Key Laboratory of Food Allergy, Nanchang 330047, China
| | - Jinyan Gao
- School of Food Science and Technology, Nanchang University, Nanchang 330031, China; Jiangxi Province Key Laboratory of Food Allergy, Nanchang 330047, China
| | - Xin Li
- State Key Laboratory of Food Science and Resource, Nanchang University, Nanchang 330047, China; School of Food Science and Technology, Nanchang University, Nanchang 330031, China; Jiangxi Province Key Laboratory of Food Allergy, Nanchang 330047, China.
| | - Hongbing Chen
- State Key Laboratory of Food Science and Resource, Nanchang University, Nanchang 330047, China; Jiangxi Province Key Laboratory of Food Allergy, Nanchang 330047, China; Sino-German Joint Research Institute, Nanchang University, Nanchang 330047, China
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2
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Saridakis E, Donta K. Protein Thermodynamic Properties, Crystallisation, and the Hofmeister Series. Chempluschem 2024:e202300733. [PMID: 38702291 DOI: 10.1002/cplu.202300733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 04/15/2024] [Accepted: 04/30/2024] [Indexed: 05/06/2024]
Abstract
The Hofmeister series is a series of ions ordered according to their ability to precipitate proteins. It has also been linked to a host of (bio)chemical phenomena. Several attempts over the years to correlate the series to the varying success of different salts in crystallising proteins have been largely inconclusive. A correlation, based on published data and crystallisation conditions for several proteins, is proposed here between some thermodynamic properties of proteins and the position in the Hofmeister series of the salts from which they preferentially crystallise. Namely, a high ratio between the entropic or enthalpic protein-solvent interactions contribution to thermodynamic stability and the total thermodynamic stability of a given protein, indicate the protein's high propensity to crystallise in solutions of highly kosmotropic salts. Low such ratios on the other hand, indicate that chaotropic salts can be equally successful, i. e. that the protein in question is rather indifferent to the Hofmeister character of the salt. Testing various model proteins for crystallisation against screens containing salts found at different points on the Hofmeister series, as well as further bibliographic analysis, have yielded results that appear to largely corroborate this hypothesis. These conclusions may conceivably be used as a crystallisation predictive tool.
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Affiliation(s)
- Emmanuel Saridakis
- Institute of Nanoscience & Nanotechnology, National Centre for Scientific Research "Demokritos", Neapoleos 27, Ag. Paraskevi, Athens, 15341, Greece
| | - Katerina Donta
- Institute of Nanoscience & Nanotechnology, National Centre for Scientific Research "Demokritos", Neapoleos 27, Ag. Paraskevi, Athens, 15341, Greece
- Department of Chemistry, University of Athens, Panepistimiopolis, Athens, 15771, Greece
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3
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Dyrda-Terniuk T, Pomastowski P. The Multifaceted Roles of Bovine Lactoferrin: Molecular Structure, Isolation Methods, Analytical Characteristics, and Biological Properties. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:20500-20531. [PMID: 38091520 PMCID: PMC10755757 DOI: 10.1021/acs.jafc.3c06887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 11/22/2023] [Accepted: 11/27/2023] [Indexed: 12/28/2023]
Abstract
Bovine lactoferrin (bLF) is widely known as an iron-binding glycoprotein from the transferrin family. The bLF molecule exhibits a broad spectrum of biological activity, including iron delivery, antimicrobial, antiviral, immunomodulatory, antioxidant, antitumor, and prebiotic functions, thereby making it one of the most valuable representatives for biomedical applications. Remarkably, LF functionality might completely differ in dependence on the iron saturation state and glycosylation patterns. Recently, a violently growing demand for bLF production has been observed, mostly for infant formulas, dietary supplements, and functional food formulations. Unfortunately, one of the reasons that inhibit the development of the bLF market and widespread protein implementation is related to its negligible amount in both major sources─colostrum and mature milk. This study provides a comprehensive overview of the significance of bLF research by delineating the key structural characteristics of the protein and elucidating their impact on its physicochemical and biological properties. Progress in the development of optimal isolation techniques for bLF is critically assessed, alongside the challenges that arise during its production. Furthermore, this paper presents a curated list of the most relevant instrumental techniques for the characterization of bLF. Lastly, it discusses the prospective applications and future directions for bLF-based formulations, highlighting their potential in various fields.
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Affiliation(s)
- Tetiana Dyrda-Terniuk
- Centre for Modern Interdisciplinary
Technologies, Nicolaus Copernicus University
in Toruń, Wileńska 4, 87-100 Toruń, Poland
| | - Paweł Pomastowski
- Centre for Modern Interdisciplinary
Technologies, Nicolaus Copernicus University
in Toruń, Wileńska 4, 87-100 Toruń, Poland
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4
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Lisina S, Inam W, Huhtala M, Howaili F, Zhang H, Rosenholm JM. Nano Differential Scanning Fluorimetry as a Rapid Stability Assessment Tool in the Nanoformulation of Proteins. Pharmaceutics 2023; 15:pharmaceutics15051473. [PMID: 37242715 DOI: 10.3390/pharmaceutics15051473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Revised: 04/20/2023] [Accepted: 05/09/2023] [Indexed: 05/28/2023] Open
Abstract
The development and production of innovative protein-based therapeutics is a complex and challenging avenue. External conditions such as buffers, solvents, pH, salts, polymers, surfactants, and nanoparticles may affect the stability and integrity of proteins during formulation. In this study, poly (ethylene imine) (PEI) functionalized mesoporous silica nanoparticles (MSNs) were used as a carrier for the model protein bovine serum albumin (BSA). To protect the protein inside MSNs after loading, polymeric encapsulation with poly (sodium 4-styrenesulfonate) (NaPSS) was used to seal the pores. Nano differential scanning fluorimetry (NanoDSF) was used to assess protein thermal stability during the formulation process. The MSN-PEI carrier matrix or conditions used did not destabilize the protein during loading, but the coating polymer NaPSS was incompatible with the NanoDSF technique due to autofluorescence. Thus, another pH-responsive polymer, spermine-modified acetylated dextran (SpAcDEX), was applied as a second coating after NaPSS. It possessed low autofluorescence and was successfully evaluated with the NanoDSF method. Circular dichroism (CD) spectroscopy was used to determine protein integrity in the case of interfering polymers such as NaPSS. Despite this limitation, NanoDSF was found to be a feasible and rapid tool to monitor protein stability during all steps needed to create a viable nanocarrier system for protein delivery.
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Affiliation(s)
- Sofia Lisina
- Pharmaceutical Sciences Laboratory, Faculty of Science and Engineering, Åbo Akademi University, 20500 Turku, Finland
| | - Wali Inam
- Pharmaceutical Sciences Laboratory, Faculty of Science and Engineering, Åbo Akademi University, 20500 Turku, Finland
| | - Mikko Huhtala
- Structural Bioinformatics Laboratory, Faculty of Science and Engineering, Biochemistry, Åbo Akademi University, 20500 Turku, Finland
| | - Fadak Howaili
- Pharmaceutical Sciences Laboratory, Faculty of Science and Engineering, Åbo Akademi University, 20500 Turku, Finland
| | - Hongbo Zhang
- Pharmaceutical Sciences Laboratory, Faculty of Science and Engineering, Åbo Akademi University, 20500 Turku, Finland
| | - Jessica M Rosenholm
- Pharmaceutical Sciences Laboratory, Faculty of Science and Engineering, Åbo Akademi University, 20500 Turku, Finland
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Solid state synthesis of bispyridyl-ferrocene conjugates with unusual site selective 1,4-Michael addition, as potential inhibitor and electrochemical probe for fibrillation in amyloidogenic protein. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2022.134362] [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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Shih O, Liao KF, Yeh YQ, Su CJ, Wang CA, Chang JW, Wu WR, Liang CC, Lin CY, Lee TH, Chang CH, Chiang LC, Chang CF, Liu DG, Lee MH, Liu CY, Hsu TW, Mansel B, Ho MC, Shu CY, Lee F, Yen E, Lin TC, Jeng U. Performance of the new biological small- and wide-angle X-ray scattering beamline 13A at the Taiwan Photon Source. J Appl Crystallogr 2022; 55:340-352. [PMID: 35497659 PMCID: PMC8985603 DOI: 10.1107/s1600576722001923] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Accepted: 02/18/2022] [Indexed: 12/02/2022] Open
Abstract
A new endstation for biological small- and wide-angle X-ray scattering is detailed, which provides development opportunities for studying correlated local and global structures of biomolecules in solution. Recent developments in the instrumentation and data analysis of synchrotron small-angle X-ray scattering (SAXS) on biomolecules in solution have made biological SAXS (BioSAXS) a mature and popular tool in structural biology. This article reports on an advanced endstation developed at beamline 13A of the 3.0 GeV Taiwan Photon Source for biological small- and wide-angle X-ray scattering (SAXS–WAXS or SWAXS). The endstation features an in-vacuum SWAXS detection system comprising two mobile area detectors (Eiger X 9M/1M) and an online size-exclusion chromatography system incorporating several optical probes including a UV–Vis absorption spectrometer and refractometer. The instrumentation and automation allow simultaneous SAXS–WAXS data collection and data reduction for high-throughput biomolecular conformation and composition determinations. The performance of the endstation is illustrated with the SWAXS data collected for several model proteins in solution, covering a scattering vector magnitude q across three orders of magnitude. The crystal-model fittings to the data in the q range ∼0.005–2.0 Å−1 indicate high similarity of the solution structures of the proteins to their crystalline forms, except for some subtle hydration-dependent local details. These results open up new horizons of SWAXS in studying correlated local and global structures of biomolecules in solution.
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Mandal P, Kretzschmar J, Drobot B. Not just a background: pH buffers do interact with lanthanide ions-a Europium(III) case study. J Biol Inorg Chem 2022; 27:249-260. [PMID: 35150337 PMCID: PMC8907096 DOI: 10.1007/s00775-022-01930-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Accepted: 01/14/2022] [Indexed: 12/23/2022]
Abstract
The interaction between Eu(III) ion and different pH buffers, popular in biology and biochemistry, viz. HEPES, PIPES, MES, MOPS, and TRIS, has been studied by solution nuclear magnetic resonance spectroscopy (NMR) and time-resolved laser-induced fluorescence spectroscopy (TRLFS) techniques. The Good’s buffers reveal non-negligible interaction with Eu(III) as determined from their complex stability constants, where the sites of interaction are the morpholine and piperazine nitrogen atoms, respectively. In contrast, TRIS buffer shows practically no affinity towards Eu(III). Therefore, when investigating lanthanides, TRIS buffer should be preferred over Good’s buffers.
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Affiliation(s)
- Poulami Mandal
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstr. 400, 01328, Dresden, Germany
| | - Jerome Kretzschmar
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstr. 400, 01328, Dresden, Germany
| | - Björn Drobot
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstr. 400, 01328, Dresden, Germany.
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8
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Naik J, Kulkarni D, Kadu P, Pandya A, Kale P. Use of In silico tools for screening buffers to overcome physical instability of Abatacept. Transpl Immunol 2022; 71:101551. [PMID: 35122959 DOI: 10.1016/j.trim.2022.101551] [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: 08/31/2021] [Revised: 12/30/2021] [Accepted: 01/29/2022] [Indexed: 10/19/2022]
Abstract
Rheumatoid arthritis is an autoimmune disorder. Abatacept (CTLA4-Ig) is used for the treatment of Rheumatoid arthritis. Abatacept is a monoclonal antibody. Monoclonal antibodies undergo chemical (e.g. oxidation, deamidation, hydrolysis) and physical (e.g. aggregation, unfolding) instabilities while handling and storage. Abatacept is also prone to aggregation. Stabilizing agents such as buffers are used to stabilize monoclonal antibodies. But, the selection of the appropriate buffer is a time-consuming process because after testing many buffers based on the analysis of the results the appropriate buffer is identified. To overcome this issue in the current study computational tools were utilized to virtually screen different buffers to select the appropriate buffer. Ligand binding is the principal mechanism of conformational stability of proteins. For the buffers as well ligand binding is the most common mechanism for enhancing the thermodynamic stability of proteins. Generally it is observed that by enhancing the thermodynamic stability there is reduction in the rate of aggregation of proteins. Buffer (ligand) binds to the native state of the protein preferentially; it results in stabilization of the protein, while in the case of denatured protein it has no impact. There are many studies conducted involving the proteins in buffer solutions but very limited information is available about the mechanism of protein-buffer interactions. In the current study ligand binding mechanism of protein - buffer interaction was studied using molecular docking. After the docking buffers were ranked according to their energy value. The lower energy scores represent better protein-buffer (ligand) binding affinity compared to high energy values. It was observed that Phosphate with a binding affinity of -107.9 kcal/mol was the buffer with the least binding energy followed by Citrate (-70.6 kcal/mol), Melglumine (-66.6 kcal/mol), Arginine (-64.5 kcal/mol), Glucono delta lactone (-62.6 kcal/mol), Sodium citrate (-56.5 kcal/mol), Tromethamine (-52.3 kcal/mol), Glycine HCl (-37.2 kcal/mol), Sulfuric acid (-37.7 kcal/mol), Ammonium acetate (-31.1 kcal/mol), Acetic acid (-30.7 kcal/mol). With lower binding energy higher is the affinity between the ligand and protein. So phosphate was identified as a buffer with the highest affinity with Abatacept.
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Affiliation(s)
- Janhavi Naik
- SVKM's Dr. Bhanuben Nanavati College of Pharmacy, Mumbai 400056, India
| | - Duttraj Kulkarni
- SVKM's Dr. Bhanuben Nanavati College of Pharmacy, Mumbai 400056, India
| | - Pramod Kadu
- Department of Pharmaceutics, SVKM's Dr. Bhanuben Nanavati College of Pharmacy, Mumbai 400056, India.
| | - Aditya Pandya
- SVKM's Dr. Bhanuben Nanavati College of Pharmacy, Mumbai 400056, India
| | - Pravin Kale
- Department of Pharmacology, SVKM's Dr. Bhanuben Nanavati College of Pharmacy, Mumbai 400056, India
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9
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Volumetric, Viscometric and Spectroscopic Properties of Glycylglycine in Citrate and Acetate Buffer Solutions at Different Temperatures. J SOLUTION CHEM 2021. [DOI: 10.1007/s10953-021-01129-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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10
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Ruzza P, Honisch C, Hussain R, Siligardi G. Free Radical Generation in Far-UV Synchrotron Radiation Circular Dichroism Assays-Protein and Buffer Composition Contribution. Int J Mol Sci 2021; 22:11325. [PMID: 34768758 PMCID: PMC8583428 DOI: 10.3390/ijms222111325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 10/14/2021] [Accepted: 10/15/2021] [Indexed: 11/29/2022] Open
Abstract
A useful tool to analyze the ligands and/or environmental contribution to protein stability is represented by the Synchrotron Radiation Circular Dichroism UV-denaturation assay that consists in the acquisition of several consecutive repeated far-UV SRCD spectra. Recently we demonstrated that the prevailing mechanism of this denaturation involves the generation of free radicals and reactive oxygen species (ROS). In this work, we analyzed the effect of buffering agents commonly used in spectroscopic measurements, including MOPS (3-(N-morpholino) propanesulfonic acid), HEPES (4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid), TRIS-HCl (tris-hydroxymethil aminomethane hydrochloride), and phosphate, on the efficiency of protein denaturation caused by exposure to UV radiation. Fluorescence experiments confirmed the presence of ROS and were used to determine the rate of ROS generation. Our results indicate that the efficiency of the denaturation process is strongly influenced by the buffer composition with MOPS and HEPES acting also as scavengers and that the presence of proteins itself influenced the ROS formation rate.
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Affiliation(s)
- Paolo Ruzza
- Institute of Biomolecular Chemistry of CNR, Padua Unit, via Marzolo, 1, 35131 Padova, Italy;
| | - Claudia Honisch
- Institute of Biomolecular Chemistry of CNR, Padua Unit, via Marzolo, 1, 35131 Padova, Italy;
- Department of Chemical Sciences, University of Padua, via Marzolo, 1, 35131 Padova, Italy
| | - Rohanah Hussain
- Diamond Light Source Ltd., Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0DE, UK;
| | - Giuliano Siligardi
- Diamond Light Source Ltd., Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0DE, UK;
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11
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Pavani P, Kumar K, Rani A, Venkatesu P, Lee MJ. The influence of sodium phosphate buffer on the stability of various proteins: Insights into protein-buffer interactions. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.115753] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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12
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Wei Q, He J, Wang S, Hua S, Qi Y, Li F, Ling D, Zhou M. Low-dose X-ray enhanced tumor accumulation of theranostic nanoparticles for high-performance bimodal imaging-guided photothermal therapy. J Nanobiotechnology 2021; 19:155. [PMID: 34039369 PMCID: PMC8152352 DOI: 10.1186/s12951-021-00875-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Accepted: 04/27/2021] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND Theranostic nanoparticles (NPs) have achieved rapid development owing to their capacity for personalized multimodal diagnostic imaging and antitumor therapy. However, the efficient delivery and bulk accumulation of NPs in tumors are still the decisive factors in improving therapeutic effect. It is urgent to seek other methods to alters tumor microenvironment (like vascular permeability and density) for enhancing the efficiency of nanoparticles delivery and accumulation at the tumor site. METHODS Herein, we developed a Raman-tagged hollow gold nanoparticle (termed as HAuNP@DTTC) with surface-enhanced Raman scattering (SERS) property, which could be accumulated efficiently in tumor site with the pre-irradiation of low-dose (3 Gy) X-ray and then exerted highly antitumor effect in breast cancer model. RESULTS The tumor growth inhibition (TGI) of HAuNP@DTTC-induced photothermal therapy (PTT) was increased from 60% for PTT only to 97%, and the lethal distant metastasis of 4T1 breast cancer (such as lung and liver) were effectively inhibited under the X-ray-assisted PTT treatment. Moreover, with the strong absorbance induced by localized surface plasmon resonance in near-infrared (NIR) region, the signals of Raman/photoacoustic (PA) imaging in tumor was also significantly enhanced after the administration of HAuNP@DTTC, indicating it could be used as the Raman/PA imaging and photothermal agent simultaneously under 808 nm laser irradiation. CONCLUSIONS Our studied of the as-prepared HAuNP@DTTC integrated the Raman/PA imaging and PTT functions into the single platform, and showed the good prospects for clinical applications especially with the low-dose X-ray irradiation as an adjuvant, which will be a productive strategy for enhancing drug delivery and accumulation in tumor theranostics.
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Affiliation(s)
- Qiaolin Wei
- Eye Center, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310009, China
- Institute of Translational Medicine, Zhejiang University, Hangzhou, 310029, China
- Institute of Pharmacy, School of Medicine, Hangzhou Normal University, Hangzhou, 311121, China
| | - Jian He
- Institute of Translational Medicine, Zhejiang University, Hangzhou, 310029, China
| | - Shuaifei Wang
- Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Shiyuan Hua
- Institute of Translational Medicine, Zhejiang University, Hangzhou, 310029, China
| | - Yuchen Qi
- Institute of Translational Medicine, Zhejiang University, Hangzhou, 310029, China
| | - Fangyuan Li
- Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Daishun Ling
- Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China.
- Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, National Center of Translational Medicine, Shanghai Jiao Tong University, Shanghai, 200240, China.
| | - Min Zhou
- Eye Center, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310009, China.
- Institute of Translational Medicine, Zhejiang University, Hangzhou, 310029, China.
- State Key Laboratory of Modern Optical Instrumentations, Zhejiang University, Hangzhou, 310058, China.
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13
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Insight into interactions between enzyme and biological buffers: Enhanced thermal stability of stem bromelain. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.114526] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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14
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Albumin Enhances the Rate at Which Coxsackievirus B3 Strain 28 Converts to A-Particles. J Virol 2020; 94:JVI.01962-19. [PMID: 31915275 DOI: 10.1128/jvi.01962-19] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Accepted: 12/21/2019] [Indexed: 12/13/2022] Open
Abstract
Three strains of coxsackievirus B3 (CVB3) differ by single mutations in capsid protein VP1 or VP3 and also differ in stability at 37°C in tissue culture medium. Among these strains, the CVB3/28 parent strain has been found to be uniquely sensitive to a component in fetal bovine serum (FBS) identified as serum albumin. In cell culture medium, serum increased the rate of CVB3/28 conversion to noninfectious particles at least 2-fold. The effect showed a saturable dose response. Rates of conversion to noninfectious virus with high concentrations of soluble coxsackievirus and adenovirus receptor (sCAR) were similar with and without FBS, but FBS amplified the catalytic effect of 100 nM sCAR nearly 3-fold. Such effects in other systems are due to nonessential activating cofactors.IMPORTANCE A factor other than the virus receptor expressed by target cells has been found to accelerate the loss of an enterovirus (CVB3/28) infectious titer, with little effect on nearly identical mutant strains. The destabilizing factor in fetal bovine serum, identified as albumin, does not interfere with the catalytic activity of soluble receptor at saturating receptor concentrations and amplifies the catalytic activity of the soluble receptor at a concentration that otherwise produces about one-third the saturated receptor-catalyzed rate of virus decay. This finding evidences the possibility that other virus-"priming" ligands may also be nonessential activating cofactors that serve to accelerate receptor-catalyzed viral eclipse.
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15
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Marín P, Martirani‐Von Abercron SM, Urbina L, Pacheco‐Sánchez D, Castañeda‐Cataña MA, Retegi A, Eceiza A, Marqués S. Bacterial nanocellulose production from naphthalene. Microb Biotechnol 2019; 12:662-676. [PMID: 31087504 PMCID: PMC6559018 DOI: 10.1111/1751-7915.13399] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2018] [Revised: 02/18/2019] [Accepted: 02/21/2019] [Indexed: 11/29/2022] Open
Abstract
Polycyclic aromatic compounds (PAHs) are toxic compounds that are released in the environment as a consequence of industrial activities. The restoration of PAH-polluted sites considers the use of bacteria capable of degrading aromatic compounds to carbon dioxide and water. Here we characterize a new Xanthobacteraceae strain, Starkeya sp. strain N1B, previously isolated during enrichment under microaerophilic conditions, which is capable of using naphthalene crystals as the sole carbon source. The strain produced a structured biofilm when grown on naphthalene crystals, which had the shape of a half-sphere organized over the crystal. Scanning electron microscopy (SEM) and GC-MS analysis indicated that the biofilm was essentially made of cellulose, composed of several micron-long nanofibrils of 60 nm diameter. A cellulosic biofilm was also formed when the cells grew with glucose as the carbon source. Fourier transformed infrared spectroscopy (FTIR) confirmed that the polymer was type I cellulose in both cases, although the crystallinity of the material greatly depended on the carbon source used for growth. Using genome mining and mutant analysis, we identified the genetic complements required for the transformation of naphthalene into cellulose, which seemed to have been successively acquired through horizontal gene transfer. The capacity to develop the biofilm around the crystal was found to be dispensable for growth when naphthalene was used as the carbon source, suggesting that the function of this structure is more intricate than initially thought. This is the first example of the use of toxic aromatic hydrocarbons as the carbon source for bacterial cellulose production. Application of this capacity would allow the remediation of a PAH into such a value-added polymer with multiple biotechnological usages.
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Affiliation(s)
- Patricia Marín
- Estación Experimental del ZaidínDepartment of Environmental ProtectionConsejo Superior de Investigaciones CientíficasCalle Profesor Albareda, 1Granada18008Spain
| | - Sophie Marie Martirani‐Von Abercron
- Estación Experimental del ZaidínDepartment of Environmental ProtectionConsejo Superior de Investigaciones CientíficasCalle Profesor Albareda, 1Granada18008Spain
| | - Leire Urbina
- Materials + Technologies Research Group (GMT)Department of Chemical and Environmental EngineeringFaculty of Engineering of GipuzkoaUniversity of the Basque CountryPza Europa 1Donostia‐San Sebastian20018Spain
| | - Daniel Pacheco‐Sánchez
- Estación Experimental del ZaidínDepartment of Environmental ProtectionConsejo Superior de Investigaciones CientíficasCalle Profesor Albareda, 1Granada18008Spain
| | - Mayra Alejandra Castañeda‐Cataña
- Estación Experimental del ZaidínDepartment of Environmental ProtectionConsejo Superior de Investigaciones CientíficasCalle Profesor Albareda, 1Granada18008Spain
| | - Aloña Retegi
- Materials + Technologies Research Group (GMT)Department of Chemical and Environmental EngineeringFaculty of Engineering of GipuzkoaUniversity of the Basque CountryPza Europa 1Donostia‐San Sebastian20018Spain
| | - Arantxa Eceiza
- Materials + Technologies Research Group (GMT)Department of Chemical and Environmental EngineeringFaculty of Engineering of GipuzkoaUniversity of the Basque CountryPza Europa 1Donostia‐San Sebastian20018Spain
| | - Silvia Marqués
- Estación Experimental del ZaidínDepartment of Environmental ProtectionConsejo Superior de Investigaciones CientíficasCalle Profesor Albareda, 1Granada18008Spain
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16
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Brudar S, Hribar-Lee B. The Role of Buffers in Wild-Type HEWL Amyloid Fibril Formation Mechanism. Biomolecules 2019; 9:E65. [PMID: 30769878 PMCID: PMC6406783 DOI: 10.3390/biom9020065] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 02/04/2019] [Accepted: 02/05/2019] [Indexed: 01/06/2023] Open
Abstract
Amyloid fibrils, highly ordered protein aggregates, play an important role in the onset of several neurological disorders. Many studies have assessed amyloid fibril formation under specific solution conditions, but they all lack an important phenomena in biological solutions-buffer specific effects. We have focused on the formation of hen egg-white lysozyme (HEWL) fibrils in aqueous solutions of different buffers in both acidic and basic pH range. By means of UV-Vis spectroscopy, fluorescence measurements and CD spectroscopy, we have managed to show that fibrillization of HEWL is affected by buffer identity (glycine, TRIS, phosphate, KCl-HCl, cacodylate, HEPES, acetate), solution pH, sample incubation (agitated vs. static) and added excipients (NaCl and PEG). HEWL only forms amyloid fibrils at pH = 2.0 under agitated conditions in glycine and KCl-HCl buffers of high enough ionic strength. Phosphate buffer on the other hand stabilizes the HEWL molecules. Similar stabilization effect was achieved by addition of PEG12000 molecules to the solution.
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Affiliation(s)
- Sandi Brudar
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 113, SI-1000 Ljubljana, Slovenia.
| | - Barbara Hribar-Lee
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 113, SI-1000 Ljubljana, Slovenia.
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17
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The effects of biological buffers TRIS, TAPS, TES on the stability of lysozyme. Int J Biol Macromol 2018; 112:720-727. [DOI: 10.1016/j.ijbiomac.2018.01.203] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Revised: 01/23/2018] [Accepted: 01/30/2018] [Indexed: 12/20/2022]
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18
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Buffer formulation affects the interaction between lysozyme and polymeric nanoparticles. J Colloid Interface Sci 2017; 504:78-85. [DOI: 10.1016/j.jcis.2017.05.031] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Revised: 05/11/2017] [Accepted: 05/11/2017] [Indexed: 11/21/2022]
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19
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Gupta BS, Shen CR, Lee MJ. Effect of biological buffers on the colloidal behavior of sodium dodecyl sulfate (SDS). Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2017.05.066] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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20
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Rinaldi F, Tengattini S, Calleri E, Bavaro T, Piubelli L, Pollegioni L, Massolini G, Temporini C. Application of a rapid HILIC-UV method for synthesis optimization and stability studies of immunogenic neo -glycoconjugates. J Pharm Biomed Anal 2017; 144:252-262. [DOI: 10.1016/j.jpba.2017.03.052] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Revised: 03/01/2017] [Accepted: 03/26/2017] [Indexed: 11/25/2022]
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21
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Shah V, Pierre B, Kirtadze T, Shin S, Kim JR. Stabilization of Bacillus circulans xylanase by combinatorial insertional fusion to a thermophilic host protein. Protein Eng Des Sel 2017; 30:281-290. [PMID: 28100651 DOI: 10.1093/protein/gzw081] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Accepted: 12/21/2016] [Indexed: 11/15/2022] Open
Abstract
High thermostability of an enzyme is critical for its industrial application. While many engineering approaches such as mutagenesis have enhanced enzyme thermostability, they often suffer from reduced enzymatic activity. A thermally stabilized enzyme with unchanged amino acids is preferable for subsequent functional evolution necessary to address other important industrial needs. In the research presented here, we applied insertional fusion to a thermophilic maltodextrin-binding protein from Pyrococcus furiosus (PfMBP) in order to improve the thermal stability of Bacillus circulans xylanase (BCX). Specifically, we used an engineered transposon to construct a combinatorial library of randomly inserted BCX into PfMBP. The library was then subjected to functional screening to identify successful PfMBP-BCX insertion complexes, PfMBP-BCX161 and PfMBP-BCX165, displaying substantially improved kinetic stability at elevated temperatures compared to unfused BCX and other controls. Results from subsequent characterizations were consistent with the view that lowered aggregation of BCX and reduced conformational flexibility at the termini was responsible for increased thermal stability. Our stabilizing approach neither sacrificed xylanase activity nor required changes in the BCX amino acid sequence. Overall, the current study demonstrated the benefit of combinatorial insertional fusion to PfMBP as a systematic tool for the creation of enzymatically active and thermostable BCX variants.
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Affiliation(s)
- Vandan Shah
- Othmer-Jacobs Department of Chemical and Biomolecular Engineering, New York University, 6 MetroTech Center, Brooklyn, NY 11201, USA
| | - Brennal Pierre
- Othmer-Jacobs Department of Chemical and Biomolecular Engineering, New York University, 6 MetroTech Center, Brooklyn, NY 11201, USA
| | - Tamari Kirtadze
- Othmer-Jacobs Department of Chemical and Biomolecular Engineering, New York University, 6 MetroTech Center, Brooklyn, NY 11201, USA
| | - Seung Shin
- Othmer-Jacobs Department of Chemical and Biomolecular Engineering, New York University, 6 MetroTech Center, Brooklyn, NY 11201, USA
| | - Jin Ryoun Kim
- Othmer-Jacobs Department of Chemical and Biomolecular Engineering, New York University, 6 MetroTech Center, Brooklyn, NY 11201, USA
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22
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Kurniawan N, van Kempen THS, Sonneveld S, Rosalina TT, Vos BE, Jansen KA, Peters GWM, van de Vosse FN, Koenderink GH. Buffers Strongly Modulate Fibrin Self-Assembly into Fibrous Networks. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:6342-6352. [PMID: 28558246 PMCID: PMC5489959 DOI: 10.1021/acs.langmuir.7b00527] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Revised: 05/27/2017] [Indexed: 05/20/2023]
Abstract
Fibrin is a plasma protein with a central role in blood clotting and wound repair. Upon vascular injury, fibrin forms resilient fibrillar networks (clots) via a multistep self-assembly process, from monomers, to double-stranded protofibrils, to a branched network of thick fibers. In vitro, fibrin self-assembly is sensitive to physicochemical conditions like the solution pH and ionic strength, which tune the strength of the noncovalent driving forces. Here we report a surprising finding that the buffer-which is necessary to control the pH and is typically considered to be inert-also significantly influences fibrin self-assembly. We show by confocal microscopy and quantitative light scattering that various common buffering agents have no effect on the initial assembly of fibrin monomers into protofibrils but strongly hamper the subsequent lateral association of protofibrils into thicker fibers. We further find that the structural changes are independent of the molecular structure of the buffering agents as well as of the activation mechanism and even occur in fibrin networks formed from platelet-poor plasma. This buffer-mediated decrease in protofibril bundling results in a marked reduction in the permeability of fibrin networks but only weakly influences the elastic modulus of fibrin networks, providing a useful tuning parameter to independently control the elastic properties and the permeability of fibrin networks. Our work raises the possibility that fibrin assembly in vivo may be regulated by variations in the acute-phase levels of bicarbonate and phosphate, which act as physiological buffering agents of blood pH. Moreover, our findings add a new example of buffer-induced effects on biomolecular self-assembly to recent findings for a range of proteins and lipids.
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Affiliation(s)
- Nicholas
A. Kurniawan
- Department
of Systems Biophysics, AMOLF, Amsterdam 1009 DB, The Netherlands
- Department of Biomedical
Engineering & Institute for Complex
Molecular Systems, and Department of Mechanical Engineering, Eindhoven University of Technology, Eindhoven 5600 MB, The Netherlands
| | - Thomas H. S. van Kempen
- Department of Biomedical
Engineering & Institute for Complex
Molecular Systems, and Department of Mechanical Engineering, Eindhoven University of Technology, Eindhoven 5600 MB, The Netherlands
| | - Stijn Sonneveld
- Department
of Systems Biophysics, AMOLF, Amsterdam 1009 DB, The Netherlands
| | - Tilaï T. Rosalina
- Department of Biomedical
Engineering & Institute for Complex
Molecular Systems, and Department of Mechanical Engineering, Eindhoven University of Technology, Eindhoven 5600 MB, The Netherlands
| | - Bart E. Vos
- Department
of Systems Biophysics, AMOLF, Amsterdam 1009 DB, The Netherlands
| | - Karin A. Jansen
- Department
of Systems Biophysics, AMOLF, Amsterdam 1009 DB, The Netherlands
| | - Gerrit W. M. Peters
- Department of Biomedical
Engineering & Institute for Complex
Molecular Systems, and Department of Mechanical Engineering, Eindhoven University of Technology, Eindhoven 5600 MB, The Netherlands
| | - Frans N. van de Vosse
- Department of Biomedical
Engineering & Institute for Complex
Molecular Systems, and Department of Mechanical Engineering, Eindhoven University of Technology, Eindhoven 5600 MB, The Netherlands
| | - Gijsje H. Koenderink
- Department
of Systems Biophysics, AMOLF, Amsterdam 1009 DB, The Netherlands
- E-mail:
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23
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Song JG, Lee SH, Han HK. The stabilization of biopharmaceuticals: current understanding and future perspectives. JOURNAL OF PHARMACEUTICAL INVESTIGATION 2017. [DOI: 10.1007/s40005-017-0341-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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24
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Abstract
Cucurbit[7]uril forms host–guest complexes with “Good's” and related biological pH buffers of varying stability in aqueous solution.
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25
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Zbacnik TJ, Holcomb RE, Katayama DS, Murphy BM, Payne RW, Coccaro RC, Evans GJ, Matsuura JE, Henry CS, Manning MC. Role of Buffers in Protein Formulations. J Pharm Sci 2016; 106:713-733. [PMID: 27894967 DOI: 10.1016/j.xphs.2016.11.014] [Citation(s) in RCA: 117] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Revised: 10/25/2016] [Accepted: 11/17/2016] [Indexed: 12/19/2022]
Abstract
Buffers comprise an integral component of protein formulations. Not only do they function to regulate shifts in pH, they also can stabilize proteins by a variety of mechanisms. The ability of buffers to stabilize therapeutic proteins whether in liquid formulations, frozen solutions, or the solid state is highlighted in this review. Addition of buffers can result in increased conformational stability of proteins, whether by ligand binding or by an excluded solute mechanism. In addition, they can alter the colloidal stability of proteins and modulate interfacial damage. Buffers can also lead to destabilization of proteins, and the stability of buffers themselves is presented. Furthermore, the potential safety and toxicity issues of buffers are discussed, with a special emphasis on the influence of buffers on the perceived pain upon injection. Finally, the interaction of buffers with other excipients is examined.
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Affiliation(s)
| | - Ryan E Holcomb
- LegacyBioDesign LLC, Johnstown, Colorado 80534; Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523
| | - Derrick S Katayama
- LegacyBioDesign LLC, Johnstown, Colorado 80534; Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523
| | - Brian M Murphy
- LegacyBioDesign LLC, Johnstown, Colorado 80534; Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523
| | - Robert W Payne
- LegacyBioDesign LLC, Johnstown, Colorado 80534; Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523
| | | | | | | | - Charles S Henry
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523
| | - Mark Cornell Manning
- LegacyBioDesign LLC, Johnstown, Colorado 80534; Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523.
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26
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Satish L, Millan S, Sahoo H. Spectroscopic insight into the interaction of bovine serum albumin with imidazolium-based ionic liquids in aqueous solution. LUMINESCENCE 2016; 32:695-705. [DOI: 10.1002/bio.3239] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Revised: 09/12/2016] [Accepted: 09/28/2016] [Indexed: 01/03/2023]
Affiliation(s)
- Lakkoji Satish
- Department of Chemistry; National Institute of Technology Rourkela; Rourkela Odisha India
| | - Sabera Millan
- Department of Chemistry; National Institute of Technology Rourkela; Rourkela Odisha India
| | - Harekrushna Sahoo
- Department of Chemistry; National Institute of Technology Rourkela; Rourkela Odisha India
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27
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Hsieh SR, Reddy PM, Chang CJ, Kumar A, Wu WC, Lin HY. Exploring the Behavior of Bovine Serum Albumin in Response to Changes in the Chemical Composition of Responsive Polymers: Experimental and Simulation Studies. Polymers (Basel) 2016; 8:E238. [PMID: 30979331 PMCID: PMC6432219 DOI: 10.3390/polym8060238] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Revised: 06/13/2016] [Accepted: 06/13/2016] [Indexed: 01/06/2023] Open
Abstract
Knowledge of the interactions between polymer and protein is very important to fabricate the potential materials for many bio-related applications. In this regard, the present work investigated the effect of copolymers on the conformation and thermal stability of bovine serum albumin (BSA) with the aid of biophysical techniques such as fluorescence spectroscopy, circular dichroism (CD) spectroscopy and differential scanning calorimetry (DSC). In comparison with that of copolymer PGA-1.5, our fluorescence spectroscopy results reveal that the copolymer PGA-1, which has a lower PEGMA/AA ratio, shows greater influence on the conformation of BSA. Copolymers induced unfolding of the polypeptide chain of BSA, which was confirmed from the loss in the negative ellipticity of CD spectra. DSC results showed that the addition of PGA-1 and PGA-1.5 (0.05% (w/v) decreased the transition temperature by 14.8 and 11.5 °C, respectively). The results from the present study on the behavior of protein in response to changes in the chemical composition of synthetic polymers are significant for various biological applications such as enzyme immobilization, protein separations, sensor development and stimuli-responsive systems.
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Affiliation(s)
- Shih-Rong Hsieh
- Department of Surgery, Taichung Veterans General Hospital, 1650 Taiwan Boulevard Section 4, Taichung 40705, Taiwan.
| | - P Madhusudhana Reddy
- Department of Chemical Engineering, Feng Chia University, 100, Wenhwa Road, Seatwen, Taichung 40724, Taiwan.
| | - Chi-Jung Chang
- Department of Chemical Engineering, Feng Chia University, 100, Wenhwa Road, Seatwen, Taichung 40724, Taiwan.
| | - Awanish Kumar
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
| | - Wan-Chi Wu
- Department of Chemical Engineering, Feng Chia University, 100, Wenhwa Road, Seatwen, Taichung 40724, Taiwan.
| | - Hui-Yi Lin
- School of Pharmacy, China Medical University, 91, Hsueh-Shih Road, Taichung 40402, Taiwan.
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28
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Gupta BS, Taha M, Lee MJ. Extraction of an active enzyme by self-buffering ionic liquids: a green medium for enzymatic research. RSC Adv 2016. [DOI: 10.1039/c6ra00607h] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The extraction of a model enzyme α-chymotrypsin in its active conformation from an aqueous solution by using new biocompatible and self-buffering Good's buffer ionic liquids-based aqueous biphasic systemsis demonstrated.
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Affiliation(s)
- Bhupender S. Gupta
- Department of Chemical Engineering
- National Taiwan University of Science and Technology
- Taipei 106-07
- Taiwan
| | - Mohamed Taha
- Department of Chemical Engineering
- National Taiwan University of Science and Technology
- Taipei 106-07
- Taiwan
- Departamento de Química
| | - Ming-Jer Lee
- Department of Chemical Engineering
- National Taiwan University of Science and Technology
- Taipei 106-07
- Taiwan
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29
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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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30
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Gupta BS, Taha M, Lee MJ. Self-buffering and biocompatible ionic liquid based biological media for enzymatic research. RSC Adv 2015. [DOI: 10.1039/c5ra16317j] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
New self-buffering Good's buffer ionic liquids (GBILs) were synthesized for biological research.
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Affiliation(s)
- Bhupender S. Gupta
- Department of Chemical Engineering
- National Taiwan University of Science and Technology
- Taipei 106-07
- Taiwan
| | - Mohamed Taha
- Departamento de Química
- CICECO
- Universidade de Aveiro
- 3810-193 Aveiro
- Portugal
| | - Ming-Jer Lee
- Department of Chemical Engineering
- National Taiwan University of Science and Technology
- Taipei 106-07
- Taiwan
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