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Zimmermann I, Kaveh-Baghbaderani Y, Eilts F, Kohn N, Fraga-García P, Berensmeier S. Direct Affinity Ligand Immobilization onto Bare Iron Oxide Nanoparticles Enables Efficient Magnetic Separation of Antibodies. ACS APPLIED BIO MATERIALS 2024; 7:3942-3952. [PMID: 38740514 PMCID: PMC11190986 DOI: 10.1021/acsabm.4c00280] [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: 02/28/2024] [Revised: 04/30/2024] [Accepted: 05/01/2024] [Indexed: 05/16/2024]
Abstract
Magnetic separation is a promising alternative to chromatography for enhancing the downstream processing (DSP) of monoclonal antibodies (mAbs). However, there is a lack of efficient magnetic particles for successful application. Aiming to fill this gap, we demonstrate the suitability of bare iron oxide nanoparticles (BION) with physical site-directed immobilization of an engineered Protein A affinity ligand (rSpA) as an innovative magnetic material. The rSpA ligand contains a short peptide tag that enables the direct and stable immobilization onto the uncoated BION surface without commonly required laborious particle activation. The resulting BION@rSpA have beneficial characteristics outperforming conventional Protein A-functionalized magnetic particles: a simple, fast, low-cost synthesis, a particle size in the nanometer range with a large effective specific surface area enabling large immunoglobulin G (IgG) binding capacity, and a high magnetophoretic velocity advantageous for fast processing. We further show rapid interactions of IgG with the easily accessible rSpA ligands. The binding of IgG to BION@rSpA is thereby highly selective and not impeded by impurity molecules in perfusion cell culture supernatant. Regarding the subsequent acidic IgG elution from BION@rSpA@IgG, we observed a hampering pH increase caused by the protonation of large iron oxide surfaces after concentrating the particles in 100 mM sodium acetate buffer. However, the pH can be stabilized by adding 50 mM glycine to the elution buffer, resulting in recoveries above 85% even at high particle concentrations. Our work shows that BION@rSpA enable efficient magnetic mAb separation and could help to overcome emerging bottlenecks in DSP.
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Affiliation(s)
- Ines Zimmermann
- Chair
of Bioseparation Engineering, TUM School of Engineering and Design, Technical University of Munich, Boltzmannstraße 15, 85748 Garching, Germany
| | - Yasmin Kaveh-Baghbaderani
- Chair
of Bioseparation Engineering, TUM School of Engineering and Design, Technical University of Munich, Boltzmannstraße 15, 85748 Garching, Germany
| | - Friederike Eilts
- Chair
of Bioseparation Engineering, TUM School of Engineering and Design, Technical University of Munich, Boltzmannstraße 15, 85748 Garching, Germany
| | - Nadja Kohn
- Chair
of Bioseparation Engineering, TUM School of Engineering and Design, Technical University of Munich, Boltzmannstraße 15, 85748 Garching, Germany
| | - Paula Fraga-García
- Chair
of Bioseparation Engineering, TUM School of Engineering and Design, Technical University of Munich, Boltzmannstraße 15, 85748 Garching, Germany
| | - Sonja Berensmeier
- Chair
of Bioseparation Engineering, TUM School of Engineering and Design, Technical University of Munich, Boltzmannstraße 15, 85748 Garching, Germany
- Munich
Institute of Integrated Materials, Energy and Process Engineering, Technical University of Munich, Lichtenbergstraße 4a, 85748 Garching, Germany
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2
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Xu Z, Li Q, Huang Y, Guo K, Xue B, Cao Y, Li Y. Blocking Nonspecific Interactions Using Y-Shape Poly(ethylene glycol). Int J Mol Sci 2023; 24:12414. [PMID: 37569789 PMCID: PMC10419274 DOI: 10.3390/ijms241512414] [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: 07/11/2023] [Revised: 07/27/2023] [Accepted: 07/31/2023] [Indexed: 08/13/2023] Open
Abstract
Nonspecific interactions play a significant role in physiological activities, surface chemical modification, and artificial adhesives. However, nonspecificity sometimes causes sticky problems, including surface fouling, decreased target specificity, and artifacts in single-molecule measurements. Adjusting the liquid pH, using protein-blocking additives, adding nonionic surfactants, or increasing the salt concentration are common methods to minimize nonspecific binding to achieve high-quality data. Here, we report that grafting heteromorphic polyethylene glycol (Y-shape PEG) with two inert terminates could noticeably decrease nonspecific binding. As a proof-of-concept, we performed single-molecule force spectroscopy and fluorescence staining imaging experiments to verify the feasibility of Y-shape PEG in blocking nonspecific interactions. Our results indicate that Y-shape PEG could serve as a prominent and efficient candidate to minimize nonspecificity for scientific and biomedical applications.
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Affiliation(s)
- Zhengyu Xu
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing 210093, China; (Z.X.); (Q.L.); (Y.H.); (K.G.); (B.X.)
- Jinan Microecological Biomedicine Shandong Laboratory, Jinan 250021, China
| | - Qingtai Li
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing 210093, China; (Z.X.); (Q.L.); (Y.H.); (K.G.); (B.X.)
| | - Yaying Huang
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing 210093, China; (Z.X.); (Q.L.); (Y.H.); (K.G.); (B.X.)
- Jinan Microecological Biomedicine Shandong Laboratory, Jinan 250021, China
| | - Kaiqiang Guo
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing 210093, China; (Z.X.); (Q.L.); (Y.H.); (K.G.); (B.X.)
| | - Bin Xue
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing 210093, China; (Z.X.); (Q.L.); (Y.H.); (K.G.); (B.X.)
- Jinan Microecological Biomedicine Shandong Laboratory, Jinan 250021, China
| | - Yi Cao
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing 210093, China; (Z.X.); (Q.L.); (Y.H.); (K.G.); (B.X.)
- Jinan Microecological Biomedicine Shandong Laboratory, Jinan 250021, China
| | - Yiran Li
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing 210093, China; (Z.X.); (Q.L.); (Y.H.); (K.G.); (B.X.)
- Medical School, Nanjing University, Nanjing 210093, China
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3
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Arciszewska K, Kowalska E, Bartnicki F, Bonarek P, Banaś AK, Strzałka W. DNA aptamer-based affinity chromatography system for purification of recombinant proteins tagged with lysine tag. J Chromatogr A 2023; 1692:463846. [PMID: 36780846 DOI: 10.1016/j.chroma.2023.463846] [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: 11/03/2022] [Revised: 01/30/2023] [Accepted: 01/31/2023] [Indexed: 02/10/2023]
Abstract
Affinity chromatography (AC) is one of the techniques widely used for the purification of recombinant proteins. In our previous study, we presented a successful application of the Argi system [1] for the purification of recombinant proteins, based on the specific interaction between an arginine tag and a DNA aptamer. Exploring the possible application of positively charged peptide tags in the purification of recombinant proteins, in this study we developed and characterized an AC system based on the specific and reversible interaction between a DNA aptamer and a lysine tag (Lys-tag) comprising five lysine residues (5 K). We optimized the length of both the selected DNA aptamer and Lys-tag which were named B5K aptamer and 5K-tag, respectively. The results showed that the stability of the B5K aptamer and 5K-tag was dependent on the presence of potassium ions. The conditions for mild elution of 5K-tagged protein from B5K aptamer were determined. Our study proved that the developed system can be used for the purification of recombinant proteins from Escherichia coli total protein extracts.
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Affiliation(s)
- Klaudia Arciszewska
- Department of Plant Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, Krakow 30-387, Poland
| | - Ewa Kowalska
- Department of Plant Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, Krakow 30-387, Poland
| | - Filip Bartnicki
- Department of Plant Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, Krakow 30-387, Poland
| | - Piotr Bonarek
- Department of Physical Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
| | - Agnieszka Katarzyna Banaś
- Department of Plant Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, Krakow 30-387, Poland
| | - Wojciech Strzałka
- Department of Plant Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, Krakow 30-387, Poland.
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4
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Mousseau CB, Pierre CA, Hu DD, Champion MM. Miniprep assisted proteomics (MAP) for rapid proteomics sample preparation. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2023; 15:916-924. [PMID: 36373982 PMCID: PMC9933840 DOI: 10.1039/d2ay01549h] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Accepted: 10/28/2022] [Indexed: 06/14/2023]
Abstract
Complete enzymatic digestion of proteins for bottom-up proteomics is substantially improved by use of detergents for denaturation and solubilization. Detergents however, are incompatible with many proteases and highly detrimental to LC-MS/MS. Recently; filter-based methods have seen wide use due to their capacity to remove detergents and harmful reagents prior to digestion and mass spectrometric analysis. We hypothesized that non-specific protein binding to negatively charged silica-based filters would be enhanced by addition of lyotropic salts, similar to DNA purification. We sought to exploit these interactions and investigate if low-cost DNA purification spin-filters, 'Minipreps,' efficiently and reproducibly bind proteins for digestion and LC-MS/MS analysis. We propose a new method, Miniprep Assisted Proteomics (MAP), for sample preparation. We demonstrate binding capacity, performance, recovery and identification rates for proteins and whole-cell lysates using MAP. MAP recovered equivalent or greater protein yields from 0.5-50 μg analyses benchmarked against commercial trapping preparations. Nano UHPLC-MS/MS proteome profiling of lysates of Escherichia coli had 99.3% overlap vs. existing approaches and reproducibility of replicate minipreps was 98.8% at the 1% FDR protein level. Label Free Quantitative proteomics was performed and 91.2% of quantified proteins had a %CV <20% (2044/2241). Miniprep Assisted Proteomics can be performed in minutes, shows low variability, high recovery and proteome depth. This suggests a significant role for adventitious binding in developing new proteomics sample preparation techniques. MAP represents an efficient, ultra-low-cost alternative for sample preparation in a commercially obtainable device that costs ∼$0.50 (USD) per miniprep.
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Affiliation(s)
- C Bruce Mousseau
- Department of Chemistry and Biochemistry, University of Notre Dame, IN 46556, USA.
| | - Camille A Pierre
- Department of Chemistry and Biochemistry, University of Notre Dame, IN 46556, USA.
| | - Daniel D Hu
- Department of Chemistry and Biochemistry, University of Notre Dame, IN 46556, USA.
| | - Matthew M Champion
- Department of Chemistry and Biochemistry, University of Notre Dame, IN 46556, USA.
- Berthiaume Institute for Precision Health, University of Notre Dame, Notre Dame, IN 46556, USA
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5
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Fei M, Zhang Q, Zhang L, Zhu X, Du C, Zhang Z. Development and validation of aggregates analysis method in analytical similarity assessment of HLX04 vs Avastin®. J Pharm Biomed Anal 2023; 223:115121. [DOI: 10.1016/j.jpba.2022.115121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2022] [Revised: 10/15/2022] [Accepted: 10/22/2022] [Indexed: 11/07/2022]
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6
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Forgione D, Nassar M, Seseogullari-Dirihan R, Jamleh A, Tezvergil-Mutluay A. Effect of phytic acid on dentinal collagen solubilization and its binding and debinding potentials to dentin. J Dent 2023; 128:104361. [PMID: 36379300 DOI: 10.1016/j.jdent.2022.104361] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 11/05/2022] [Accepted: 11/08/2022] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVES To study phytic acid (IP6) effect on collagen solubilization by assessing hydroxyproline (HYP) release, evaluate its binding to demineralized (DD) and mineralized dentin (MD) and determine the effect of different media on debinding of IP6. METHODS Demineralized dentin beams were incubated in 1%, 2% or 3% IP6 and HYP release was evaluated at 1 or 3 weeks and compared to those obtained in untreated control or phosphoric acid (PA)-treated beams. DD or MD powder was treated with 1%, 2% or 3% IP6 and the decrease in IP6 amount was quantitated by ultraviolet-visible spectroscopy. IP6-treated samples were re-suspended in distilled water, ethanol, urea or sodium chloride and the amount of IP6 displaced was determined. RESULTS At 1 week, the control group and IP6 showed lower HYP release when compared to PA (P < 0.05). There was no difference among PA, IP6 and control at 3 weeks (P = 0.22). IP6 binding was concentration dependent. 1% IP6 had higher binding potential with MD compared to DD while 2% IP6 showed the opposite result (P<0.05). 3% IP6 had similar binding values between DD and MD (P = 0.53). The highest debinding in MD occurred with urea for 2%, 3% and 1% IP6 in descending manner. Within each concentration of IP6 in DD, the highest debinding effect was reported with ethanol. CONCLUSIONS IP6 bound to DD and MD in a concentration-dependent manner. IP6 was debound from DD mostly by the action of ethanol, while in MD, urea caused the most displacement. Collagen solubilization of IP6-treated DD was comparable to untreated DD. CLINICAL SIGNIFICANCE These findings add to the potential use of IP6 as an alternative to PA for dentin etching which possibly results in long-term stability of resin-dentin adhesion.
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Affiliation(s)
| | - Mohannad Nassar
- Department of Preventive and Restorative Dentistry, College of Dental Medicine, University of Sharjah, Sharjah, United Arab Emirates.
| | | | - Ahmed Jamleh
- Restorative and Prosthetic Dental Sciences, College of Dentistry, King Saud bin Abdulaziz University for Health Sciences, National Guard Health Affairs, Riyadh, Saudi Arabia; King Abdullah International Medical Research Centre, National Guard Health Affairs, Riyadh, Saudi Arabia
| | - Arzu Tezvergil-Mutluay
- Institute of Dentistry, University of Turku, Turku, Finland; Turku University Hospital, Turku, Finland
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7
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Liu N, Wang HW. Better Cryo-EM Specimen Preparation: How to Deal with the Air-Water Interface? J Mol Biol 2022; 435:167926. [PMID: 36563741 DOI: 10.1016/j.jmb.2022.167926] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 12/08/2022] [Accepted: 12/14/2022] [Indexed: 12/24/2022]
Abstract
Cryogenic electron microscopy (cryo-EM) is now one of the most powerful and widely used methods to determine high-resolution structures of macromolecules. A major bottleneck of cryo-EM is to prepare high-quality vitrified specimen, which still faces many practical challenges. During the conventional vitrification process, macromolecules tend to adsorb at the air-water interface (AWI), which is known unfriendly to biological samples. In this review, we outline the nature of AWI and the problems caused by it, such as unpredictable or uneven particle distribution, protein denaturation, dissociation of complex and preferential orientation. We review and discuss the approaches and underlying mechanisms to deal with AWI: 1) Additives, exemplified by detergents, forming a protective layer at AWI and thus preserving the native folds of target macromolecules. 2) Fast vitrification devices based on the idea to freeze in-solution macromolecules before their touching of AWI. 3) Thin layer of continuous supporting films to adsorb macromolecules, and when functionalized with affinity ligands, to specifically anchor the target particles away from the AWI. Among these supporting films, graphene, together with its derivatives, with negligible background noise and mechanical robustness, has emerged as a new generation of support. These strategies have been proven successful in various cases and enable us a better handling of the problems caused by the AWI in cryo-EM specimen preparation.
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Affiliation(s)
- Nan Liu
- Ministry of Education Key Laboratory of Protein Sciences, Beijing Advanced Innovation Center for Structural Biology, Beijing Frontier Research Center for Biological Structures, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Hong-Wei Wang
- Ministry of Education Key Laboratory of Protein Sciences, Beijing Advanced Innovation Center for Structural Biology, Beijing Frontier Research Center for Biological Structures, School of Life Sciences, Tsinghua University, Beijing 100084, China; Tsinghua-Peking Joint Center for Life Sciences, Tsinghua University, Beijing 100084, China.
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8
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Separation of phosphorothioate oligonucleotide impurities by WAX HPLC under high organic content elution conditions. Anal Biochem 2022; 659:114956. [PMID: 36270331 DOI: 10.1016/j.ab.2022.114956] [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: 06/28/2022] [Revised: 10/11/2022] [Accepted: 10/12/2022] [Indexed: 12/14/2022]
Abstract
The separation of impurities in phosphorothioate diester (PS) oligonucleotides is complicated by (1) the presence of a very large number of diastereoisomers, e.g., 219 for a 20-mer oligonucleotide, (2) peak broadening due to the hydrophobic character of the sulfur atom, and (3) the chemical similarity of the impurities to the parent oligonucleotide and each other. Further difficulties arise due to the chemical nature of oligonucleotides, which display a complex mixture of ionic, hydrophobic, H-bonding, and other functionalities. To minimize hydrophobic interactions and peak broadening due to the PS modification, we have developed a novel method that combines a weak anion exchange (WAX) column with a mobile phase elution system designed to maximize separation by a single ionic/electrostatic interaction. We found that although chaotropes are helpful, the most significant beneficial effect of the hydrophilic WAX column is that high-organic, low-salt mobile phase is required for product elution. Separations are also benefitted by pH gradient effects on stationary phase electrostatic potential and analyte ionization. An extraordinary degree of separation is achieved by the new WAX method in comparison to SAX (strong anion exchange) chromatography. For the first time, the extent of deamination of PS oligonucleotides is directly determined by a chromatography-only method. The approach, representative results, and the mechanisms of separation are discussed.
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9
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Kurák T, Polakovič M. Adsorption Performance of a Multimodal Anion-Exchange Chromatography Membrane: Effect of Liquid Phase Composition and Separation Mode. MEMBRANES 2022; 12:1173. [PMID: 36557080 PMCID: PMC9788217 DOI: 10.3390/membranes12121173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 11/17/2022] [Accepted: 11/18/2022] [Indexed: 06/17/2023]
Abstract
Membrane chromatography is a modern, high-throughput separation method that finds important applications in therapeutic protein purification. Multimodal, salt-tolerant membranes are the most recent innovation in chromatographic membrane adsorbents. Due to the complex structure of their ligands and the bimodal texture of their carriers, their adsorption properties have not been sufficiently investigated. This work deals with the equilibrium and kinetic properties of a multimodal anion-exchange chromatography membrane, Sartobind STIC. Single- and two-component adsorption experiments were carried out with bovine serum albumin (BSA) and salmon DNA as model target and impurity components. The effect of the Hofmeister series ions and ionic strength on the BSA/DNA adsorption was investigated in micromembrane flow experiments. A significant difference was observed between the effects of monovalent and polyvalent ions when strong kosmotropic salts with polyvalent anions acted as strong displacers of BSA. On the contrary, DNA binding was rather high at elevated ionic strength, independent of the salt type. Two-component micromembrane experiments confirmed very high selectivity of DNA binding at a rather low sodium sulfate feed content and at pH 8. The strength of binding was examined in more than a dozen different desorption experiments. While BSA was desorbed relatively easily using high salt concentrations independent of buffer type and pH, while DNA was desorbed only in a very limited measure under any conditions. Separation experiments in a laboratory membrane module were carried out for the feed containing 1 g/L of BSA, 0.3 g/L of DNA, and 0.15 M of sodium sulfate. The negative flow-through mode was found to be more advantageous than the bind-elute mode, as BSA was obtained with 99% purity and a 97% yield. Membrane reuse was investigated in three adsorption-desorption-regeneration cycles.
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10
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Amidzadeh Z, Yasami‐Khiabani S, Rahimi H, Bonakdar S, Shams D, Habibi‐Anbouhi M, Golkar M, Shokrgozar MA. Enhancement of keratinocyte growth factor potential in inducing adipose‐derived stem cells differentiation into keratinocytes by collagen‐targeting. J Cell Mol Med 2022; 26:5929-5942. [DOI: 10.1111/jcmm.17619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 10/17/2022] [Accepted: 10/28/2022] [Indexed: 11/24/2022] Open
Affiliation(s)
- Zahra Amidzadeh
- National Cell Bank of Iran Pasteur Institute of Iran Tehran Iran
- Department of Parasitology Pasteur Institute of Iran Tehran Iran
| | | | - Hamzeh Rahimi
- Department of Molecular Medicine, Biotechnology Research Center Pasteur Institute of Iran Tehran Iran
| | - Shahin Bonakdar
- National Cell Bank of Iran Pasteur Institute of Iran Tehran Iran
| | - Davoud Shams
- National Cell Bank of Iran Pasteur Institute of Iran Tehran Iran
| | | | - Majid Golkar
- Department of Parasitology Pasteur Institute of Iran Tehran Iran
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11
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Yang Y, Li M, Zhao Y, Lin X, Su Z, Xin F, Du X, Zheng K, Han R, Pan Y, He S, Zhang S. Mechanism and inhibition of abnormal chromatographic behavior of serotype type A inactivated foot and mouth disease virus in high-performance size-exclusion chromatography. J Chromatogr A 2022; 1686:463648. [DOI: 10.1016/j.chroma.2022.463648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Revised: 11/04/2022] [Accepted: 11/12/2022] [Indexed: 11/15/2022]
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12
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Song Y, Yang Y, Lin X, Zhao Q, Su Z, Ma G, Zhang S. Size exclusion chromatography using large pore size media induces adverse conformational changes of inactivated foot-and-mouth disease virus particles. J Chromatogr A 2022; 1677:463301. [DOI: 10.1016/j.chroma.2022.463301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 06/30/2022] [Accepted: 07/01/2022] [Indexed: 10/17/2022]
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13
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Comparison of the impact of anion and cation selection onto cation exchange chromatography of model proteins. J Chromatogr A 2022; 1673:463054. [DOI: 10.1016/j.chroma.2022.463054] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 03/29/2022] [Accepted: 04/10/2022] [Indexed: 10/18/2022]
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14
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Misiura A, Dutta C, Leung W, Zepeda O J, Terlier T, Landes CF. The competing influence of surface roughness, hydrophobicity, and electrostatics on protein dynamics on a self-assembled monolayer. J Chem Phys 2022; 156:094707. [DOI: 10.1063/5.0078797] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Surface morphology, in addition to hydrophobic and electrostatic effects, can alter how proteins interact with solid surfaces. Understanding the heterogeneous dynamics of protein adsorption on surfaces with varying roughness is experimentally challenging. In this work, we use single-molecule fluorescence microscopy to study the adsorption of α-lactalbumin protein on the glass substrate covered with a self-assembled monolayer (SAM) with varying surface concentrations. Two distinct interaction mechanisms are observed: localized adsorption/desorption and continuous-time random walk (CTRW). We investigate the origin of these two populations by simultaneous single-molecule imaging of substrates with both bare glass and SAM-covered regions. SAM-covered areas of substrates are found to promote CTRW, whereas glass surfaces promote localized motion. Contact angle measurements and atomic force microscopy imaging show that increasing SAM concentration results in both increasing hydrophobicity and surface roughness. These properties lead to two opposing effects: increasing hydrophobicity promotes longer protein flights, but increasing surface roughness suppresses protein dynamics resulting in shorter residence times. Our studies suggest that controlling hydrophobicity and roughness, in addition to electrostatics, as independent parameters could provide a means to tune desirable or undesirable protein interactions with surfaces.
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Affiliation(s)
| | - Chayan Dutta
- Department of Chemistry, Rice University, Houston, Texas 77005, USA
| | - Wesley Leung
- Applied Physics Graduate Program, Rice University, Houston, Texas 77005, USA
| | - Jorge Zepeda O
- Department of Electrical and Computer Engineering, Rice University, Houston, Texas 77005, USA
| | - Tanguy Terlier
- SIMS Laboratory, Shared Equipment Authority, Rice University, Houston, Texas 77005, USA
| | - Christy F. Landes
- Department of Chemistry, Rice University, Houston, Texas 77005, USA
- Department of Electrical and Computer Engineering, Rice University, Houston, Texas 77005, USA
- Chemical and Biomolecular Engineering, Rice University, Houston, Texas 77005, USA
- Smalley-Curl Institute, Rice University, Houston, Texas 77005, USA
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15
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NaCl precleaning of microfiltration membranes fouled with oil-in-water emulsions: Impact on fouling dislodgment. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2021.120353] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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16
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Assessment of Therapeutic Antibody Developability by Combinations of In Vitro and In Silico Methods. METHODS IN MOLECULAR BIOLOGY (CLIFTON, N.J.) 2022; 2313:57-113. [PMID: 34478132 DOI: 10.1007/978-1-0716-1450-1_4] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Although antibodies have become the fastest-growing class of therapeutics on the market, it is still challenging to develop them for therapeutic applications, which often require these molecules to withstand stresses that are not present in vivo. We define developability as the likelihood of an antibody candidate with suitable functionality to be developed into a manufacturable, stable, safe, and effective drug that can be formulated to high concentrations while retaining a long shelf life. The implementation of reliable developability assessments from the early stages of antibody discovery enables flagging and deselection of potentially problematic candidates, while focussing available resources on the development of the most promising ones. Currently, however, thorough developability assessment requires multiple in vitro assays, which makes it labor intensive and time consuming to implement at early stages. Furthermore, accurate in vitro analysis at the early stage is compromised by the high number of potential candidates that are often prepared at low quantities and purity. Recent improvements in the performance of computational predictors of developability potential are beginning to change this scenario. Many computational methods only require the knowledge of the amino acid sequences and can be used to identify possible developability issues or to rank available candidates according to a range of biophysical properties. Here, we describe how the implementation of in silico tools into antibody discovery pipelines is increasingly offering time- and cost-effective alternatives to in vitro experimental screening, thus streamlining the drug development process. We discuss in particular the biophysical and biochemical properties that underpin developability potential and their trade-offs, review various in vitro assays to measure such properties or parameters that are predictive of developability, and give an overview of the growing number of in silico tools available to predict properties important for antibody development, including the CamSol method developed in our laboratory.
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17
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Abolghasemi-Dehaghani S, Gharanfoli M, Habibi-Rezaei M, Khavari-Nejad RA. Enhanced recovery yield by utilizing an improved purification method for recombinant human follicle-stimulating hormone expressed in CHO cells: Applying CaptureSelect™-FSH affinity matrix. J LIQ CHROMATOGR R T 2021. [DOI: 10.1080/10826076.2021.1960857] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
| | - Mohsen Gharanfoli
- Department of Genetics, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
| | - Mehran Habibi-Rezaei
- Protein Biotechnology Research Lab (PBRL), School of Biology, College of Science, University of Tehran, Tehran, Iran
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18
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Carlsen A, Tabard-Cossa V. Mapping shifts in nanopore signal to changes in protein and protein-DNA conformation. Proteomics 2021; 22:e2100068. [PMID: 34845853 DOI: 10.1002/pmic.202100068] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 10/28/2021] [Accepted: 11/12/2021] [Indexed: 11/08/2022]
Abstract
Solid-state nanopores have been used extensively in biomolecular studies involving DNA and proteins. However, the interpretation of signals generated by the translocation of proteins or protein-DNA complexes remains challenging. Here, we investigate the behavior of monovalent streptavidin and the complex it forms with short biotinylated DNA over a range of nanopore sizes, salts, and voltages. We describe a simple geometric model that is broadly applicable and employ it to explain observed variations in conductance blockage and dwell time with experimental conditions. The general approach developed here underscores the value of nanopore-based protein analysis and represents progress toward the interpretation of complex translocation signals.
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Affiliation(s)
- Autumn Carlsen
- Department of Physics, University of Ottawa, Ottawa, Ontario, Canada
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19
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Opdensteinen P, Meyer S, Buyel JF. Nicotiana spp. for the Expression and Purification of Functional IgG3 Antibodies Directed Against the Staphylococcus aureus Alpha Toxin. FRONTIERS IN CHEMICAL ENGINEERING 2021. [DOI: 10.3389/fceng.2021.737010] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Immunoglobulin subclass IgG1 is bound and neutralized effectively by Staphylococcus aureus protein A, allowing the bacterium to evade the host’s adaptive immune response. In contrast, the IgG3 subclass is not bound by protein A and can be used to treat S. aureus infections, including drug-resistant strains such as methicillin-resistant Staphylococcus aureus (MRSA). However, the yields of recombinant IgG3 are generally low because this subclass is prone to degradation, and recovery is hindered by the inability to use protein A as an affinity ligand for antibody purification. Here, we investigated plants (Nicotiana spp.) as an alternative to microbes and mammalian cell cultures for the production of an IgG3 antibody specific for the S. aureus alpha toxin. We targeted recombinant IgG3 to different subcellular compartments and tested different chromatography conditions to improve recovery and purification. Finally, we tested the antigen-binding capacity of the purified antibodies. The highest IgG3 levels in planta (>130 mg kg−1 wet biomass) were achieved by targeting the endoplasmic reticulum or apoplast. Although the purity of IgG3 exceeded 95% following protein G chromatography, product recovery requires further improvement. Importantly, the binding affinity of the purified antibodies was in the nanomolar range and thus comparable to previous studies using murine hybridoma cells as the production system.
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20
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Černigoj U, Vidič J, Ferjančič A, Sinur U, Božič K, Mencin N, Martinčič Celjar A, Gagnon P, Štrancar A. Guanidine improves DEAE anion exchange-based analytical separation of plasmid DNA. Electrophoresis 2021; 42:2619-2625. [PMID: 34569093 DOI: 10.1002/elps.202100210] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 09/04/2021] [Accepted: 09/17/2021] [Indexed: 11/10/2022]
Abstract
Elution of strong and weak anion exchangers with sodium chloride gradients is commonly employed for analysis of sample mixtures containing different isomers of plasmid DNA. Gradient elution of a weak anion exchanger (diethylaminoethyl) in the presence of guanidine hydrochloride (Gdn) roughly doubles resolution between open-circular (oc) and supercoiled (sc) isomers. It also improves resolution among sc, linear, and multimeric/aggregated forms. Sharper elution peaks with less tailing increase sensitivity about 30%. However, elution with an exclusively Gdn gradient to 900 mM causes more than 10% loss of plasmid. Elution with a sodium chloride gradient while maintaining Gdn at a level concentration of 300 mM achieves close to 100% recovery of sc plasmid while maintaining the separation improvements achieved by exclusively Gdn elution. Corresponding improvements in separation performance are not observed on a strong (quaternary amine) anion exchanger. Other chaotropic salts do not produce a favorable result on either exchanger, nor does the inclusion of surfactants or EDTA. Selectivity of the diethylaminoethyl-Gdn method is orthogonal to electrophoresis, but with better quantification than agarose electrophoresis, better quantitative accuracy than CE, and resolution approaching CE.
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Affiliation(s)
- Urh Černigoj
- BIA Separations d.o.o., a Sartorius company, Ajdovščina, Slovenia
| | - Jana Vidič
- BIA Separations d.o.o., a Sartorius company, Ajdovščina, Slovenia
| | - Ana Ferjančič
- BIA Separations d.o.o., a Sartorius company, Ajdovščina, Slovenia
| | - Urša Sinur
- BIA Separations d.o.o., a Sartorius company, Ajdovščina, Slovenia
| | - Klemen Božič
- BIA Separations d.o.o., a Sartorius company, Ajdovščina, Slovenia
| | - Nina Mencin
- BIA Separations d.o.o., a Sartorius company, Ajdovščina, Slovenia
| | | | - Pete Gagnon
- BIA Separations d.o.o., a Sartorius company, Ajdovščina, Slovenia
| | - Aleš Štrancar
- BIA Separations d.o.o., a Sartorius company, Ajdovščina, Slovenia
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21
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Alias M, Hamzah S, Saidin J, Yatim NI, Che Harun MH, Wan Mohamad WAF, Hairom NHH, Ali A, Ali N. Integration of hydroxyapatite from fish scales and polyethersulfone membrane for protease separation from Bacillus subtilis. SEP SCI TECHNOL 2021. [DOI: 10.1080/01496395.2021.1948866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Maslinda Alias
- Faculty of Ocean Engineering Technology and Informatics, Universiti Malaysia Terengganu, Kuala Terengganu, Malaysia
| | - Sofiah Hamzah
- Faculty of Ocean Engineering Technology and Informatics, Universiti Malaysia Terengganu, Kuala Terengganu, Malaysia
| | - Jasnizat Saidin
- Institute of Marine Biotechnology, Universiti Malaysia Terengganu, Kuala Terengganu, Malaysia
| | - Norhafiza Ilyana Yatim
- Higher Institution Centre of Excellence (Hicoe), Institute of Tropical Aquaculture and Fisheries, Universiti Malaysia Terengganu, Kuala Terengganu, Malaysia
| | - Mohammad Hakim Che Harun
- Faculty of Ocean Engineering Technology and Informatics, Universiti Malaysia Terengganu, Kuala Terengganu, Malaysia
| | | | - Nur Hanis Hayati Hairom
- Microelectronics and Nanotechnology-Shamsuddin Research Center, Institute for Integrated Engineering, Universiti Tun Hussein Onn Malaysia, Batu Pahat, Malaysia
- Faculty of Engineering Technology, Universiti Tun Hussein Onn Malaysia, Muar, Malaysia
| | - Asmadi Ali
- Faculty of Ocean Engineering Technology and Informatics, Universiti Malaysia Terengganu, Kuala Terengganu, Malaysia
| | - Nora’aini Ali
- Faculty of Ocean Engineering Technology and Informatics, Universiti Malaysia Terengganu, Kuala Terengganu, Malaysia
- Higher Institution Centre of Excellence (Hicoe), Institute of Tropical Aquaculture and Fisheries, Universiti Malaysia Terengganu, Kuala Terengganu, Malaysia
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22
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Haridhasapavalan KK, Ranjan SH, Bhattacharyya S, Thummer RP. Soluble expression, purification, and secondary structure determination of human MESP1 transcription factor. Appl Microbiol Biotechnol 2021; 105:2363-2376. [PMID: 33651130 DOI: 10.1007/s00253-021-11194-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 02/04/2021] [Accepted: 02/19/2021] [Indexed: 02/06/2023]
Abstract
Transcription factor MESP1 is a crucial factor regulating cardiac, hematopoietic, and skeletal myogenic development. Besides, it also contributes to the generation of functional cardiomyocytes. Here, we report the soluble expression and purification of the full-length human MESP1 protein from the heterologous system, which can be delivered into the target mammalian cells. To generate this biological macromolecule, we cloned its codon-optimized gene sequence fused to a nuclear localization sequence, a cell-penetrating peptide, and a His-tag into the protein expression vector and expressed in the bacterial system (E. coli strain BL21(DE3)). Subsequently, we have screened and identified the optimal expression parameters to obtain this recombinant fusion protein in soluble form from E. coli and examined its expression concerning the placement of fusion tags at either terminal. Further, we have purified this recombinant fusion protein to homogeneity under native conditions. Notably, this purified fusion protein has maintained its secondary structure after purification, primarily comprising α-helices and random coils. This molecular tool can potentially replace its genetic and viral forms in the cardiac reprogramming of fibroblasts to induce a cardiac transcriptional profile in an integration-free manner and elucidating its role in various biological processes and diseases. KEY POINTS: • Screening of the suitable gene construct was performed and identified. • Screening of optimal expression conditions was performed and identified. • Native purification of recombinant human MESP1 protein from E. coli was performed. • Recombinant MESP1 protein has retained its secondary structure after purification.
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Affiliation(s)
- Krishna Kumar Haridhasapavalan
- Laboratory for Stem Cell Engineering and Regenerative Medicine, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, Assam, 781039, India
| | - Sujal Harsh Ranjan
- Laboratory for Stem Cell Engineering and Regenerative Medicine, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, Assam, 781039, India
| | - Srirupa Bhattacharyya
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, Assam, 781039, India
| | - Rajkumar P Thummer
- Laboratory for Stem Cell Engineering and Regenerative Medicine, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, Assam, 781039, India.
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23
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Goncharuk MV, Lushpa VA, Goncharuk SA, Arseniev AS, Mineev KS. Sampling the cultivation parameter space for the bacterial production of TLR1 intracellular domain reveals the multiple optima. Protein Expr Purif 2021; 181:105832. [PMID: 33516826 DOI: 10.1016/j.pep.2021.105832] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 01/14/2021] [Accepted: 01/24/2021] [Indexed: 10/25/2022]
Abstract
T7 expression system is an extremely popular approach for the recombinant protein production in Escherichia coli for structural and functional studies and therapeutic applications. There are many useful tools and successful techniques that allow expressing the desired protein in this system. However, high yield of soluble protein often requires a systematic optimization of a wide range of cell cultivation parameters. Here we analyze the effect of three key cultivation parameters - chemical inductor, temperature and time of post-induction culturing on the expression level of TLR1 intracellular TIR domain in a soluble form. In addition, the influence of Triton X-100 detergent on the protein solubility during the cell lysis was investigated. We show that a high expression level of the correctly folded soluble protein can be obtained under different combinations of cultivation parameters.
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Affiliation(s)
- Marina V Goncharuk
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences, 117997, Miklukho-Maklaya str., 16/10, Moscow, Russia.
| | - Vladislav A Lushpa
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences, 117997, Miklukho-Maklaya str., 16/10, Moscow, Russia; Moscow Institute of Physics and Technology, 141701, Institutsky per, 9, Dolgoprudny, Russia
| | - Sergey A Goncharuk
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences, 117997, Miklukho-Maklaya str., 16/10, Moscow, Russia
| | - Alexander S Arseniev
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences, 117997, Miklukho-Maklaya str., 16/10, Moscow, Russia
| | - Konstantin S Mineev
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences, 117997, Miklukho-Maklaya str., 16/10, Moscow, Russia
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24
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LI J, ZHUO Y, ZHANG Y, LI N, WU J. [Size exclusion-reverse liquid column chromatography-mass spectrometry and its application in the identification of post-translationally modified proteins in rat kidney]. Se Pu 2021; 39:87-95. [PMID: 34227362 PMCID: PMC9274831 DOI: 10.3724/sp.j.1123.2020.05028] [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: 05/29/2020] [Indexed: 11/25/2022] Open
Abstract
Proteomics is an emerging field that has been shown to play a crucial role in unveiling the mechanisms underlying physiological and pathological processes, and liquid chromatography-mass spectrometry (LC-MS) is one of the most important methods employed in this field. However, in complex biological systems, such as eukaryotes, it is challenging to perform a comprehensive and unbiased proteome analysis due to the high complexity of biological samples and enormous differences in sample contents. For example, post-translational modifications (PTMs) in proteins are imperative for cell signaling, but post-translationally modified proteins account for about 1% of the total proteins in a single cell, making their identification extremely difficult. Therefore, chromatographic separation methods based on different principles are generally applied to reduce the complexity of biological samples and enrich trace proteins for their identification through mass spectrometry (MS). In this study, we developed a new proteomics method by combining size exclusion chromatography (SEC) and reversed-phase chromatography (RPLC), to separate and identify trace proteins in complex systems. SEC was used to separate and enrich kidney-specific proteins. After optimization of the method, it was found that 30 mmol/L of ammonium acetate could efficiently separate rat kidney proteins from the total protein fraction so that they could be eluted based on their relative molecular mass. Sodium dodecyl sulphate-polyacrylamide gel electrophoresis (SDS-PAGE) analysis and LC-MS results showed that our SEC separation method not only refined the protein composition of the biological sample but also enhanced the relative contents of trace proteins through multiple injections. The collected protein fractions were further concentrated through ultrafiltration centrifugation followed by freeze-drying, which further improved the recovery of trace proteins by approximately 90% and largely decreased the time required with the use of freeze-drying alone. Thereafter, five protein fractions were separately digested using trypsin, and the resultant peptides were further analyzed by reverse phase chromatography-MS analysis. In the RPLC column, the peptides were isolated mainly based on their hydrophobicity. As a result, by combining SEC and RPLC, 23621 peptides and 1345 proteins were identified from the kidney, with an increase in numbers by 69% and 27%, respectively, when compared to those obtained using the common 2D strong cation exchange (SCX)-RPLC-MS method. However, no significant difference was observed in the pI and grand average of hydropathicity (GRAVY) values. Gene ontology (GO) analysis revealed an increase in the number of proteins in each cell component, especially the membrane. Furthermore, identification of a higher rate of identified peptides than proteins suggested that the protein coverage was also improved, thereby facilitating the detection of PTM proteins. Consequently, five common PTMs in biological processes, including methylation, acetylation, carbamylation, oxidation, and phosphorylation, were examined and compared between the two methods. As expected, the number of post-translationally modified peptides identified using SEC-RPLC-MS were 1.7-1.9 times more than those determined using the SCX-RPLC-MS method. Especially for the identification of phosphorylated peptides, we could achieve the level of the targeted enrichment strategy; however no significant difference was observed in the extents of phosphorylation among serine, threonine, and tyrosine. These results further indicate that upon combining SEC and RPLC, high efficiency could be achieved by decreasing the complexity of the protein sample, and the identification was unbiased. Finally, the phosphorylation of some kidney proteins, such as spectrin, L-lactate dehydrogenase, and ATPases, was found, which is critical for their functions. In summary, the SEC-RPLC-MS approach was developed for the identification of rat kidney proteins and is especially applicable for the identification of PTM proteins. Using this method, the identification efficiency for PTM peptides increased significantly. Therefore, this method has potential for better understanding the impact of PTM on kidney proteins and further elucidating the potential mechanisms underlying its physiological and pathological functions.
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Affiliation(s)
- Jianmin LI
- 澳门科技大学中医药学院, 中药质量研究国家重点实验室, 澳门 999078
- Faculty of Chinese Medicine, State Key Laboratory of Quality Research in Chinese Medicine, Macau University of Science and Technology, Macau 999078, China
| | - Yue ZHUO
- 澳门科技大学中医药学院, 中药质量研究国家重点实验室, 澳门 999078
- Faculty of Chinese Medicine, State Key Laboratory of Quality Research in Chinese Medicine, Macau University of Science and Technology, Macau 999078, China
| | - Yida ZHANG
- 澳门科技大学中医药学院, 中药质量研究国家重点实验室, 澳门 999078
- Faculty of Chinese Medicine, State Key Laboratory of Quality Research in Chinese Medicine, Macau University of Science and Technology, Macau 999078, China
| | - Na LI
- 澳门科技大学中医药学院, 中药质量研究国家重点实验室, 澳门 999078
- Faculty of Chinese Medicine, State Key Laboratory of Quality Research in Chinese Medicine, Macau University of Science and Technology, Macau 999078, China
| | - Jianlin WU
- 澳门科技大学中医药学院, 中药质量研究国家重点实验室, 澳门 999078
- Faculty of Chinese Medicine, State Key Laboratory of Quality Research in Chinese Medicine, Macau University of Science and Technology, Macau 999078, China
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25
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Mao Y, Fan R, Li R, Ye X, Kulozik U. Flow-through enzymatic reactors using polymer monoliths: From motivation to application. Electrophoresis 2020; 42:2599-2614. [PMID: 33314167 DOI: 10.1002/elps.202000266] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2020] [Revised: 11/01/2020] [Accepted: 12/04/2020] [Indexed: 11/06/2022]
Abstract
The application of monolithic materials as carriers for enzymes has rapidly expanded to the realization of flow-through analysis and bioconversion processes. This expansion is partly attributed to the absence from diffusion limitation in many monoliths-based enzyme reactors. Particularly, the relatively ease of introducing functional groups renders polymer monoliths attractive as enzyme carriers. After summarizing the motivation to develop enzymatic reactors using polymer monoliths, this review reports the most recent applications of such reactors. Besides, the present review focuses on the crucial characteristics of polymer monoliths affecting the immobilization of enzymes and the processing parameters dictating the performance of the resulting enzymatic reactors. This review is intended to provide a guideline for designing and applying flow-through enzymatic reactors using polymer monoliths.
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Affiliation(s)
- Yuhong Mao
- Fujian Key Laboratory of Marine Enzyme Engineering, College of Biological Science and Technology, Fuzhou University, Fuzhou, Fujian, P. R. China
| | - Rong Fan
- Institute of Bioprocess Engineering and Pharmaceutical Technology, University of Applied Sciences Mittelhessen, Giessen, Germany
| | - Renkuan Li
- Fujian Key Laboratory of Marine Enzyme Engineering, College of Biological Science and Technology, Fuzhou University, Fuzhou, Fujian, P. R. China
| | - Xiuyun Ye
- Fujian Key Laboratory of Marine Enzyme Engineering, College of Biological Science and Technology, Fuzhou University, Fuzhou, Fujian, P. R. China
| | - Ulrich Kulozik
- Chair of Food and Bioprocess Engineering, Technical University of Munich, Freising-Weihenstephan, Germany
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26
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Sarraf M, Beig-babaei A, Naji-Tabasi S. Application of QuEChERS method for extraction of functional compounds. SN APPLIED SCIENCES 2020. [DOI: 10.1007/s42452-020-03639-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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27
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Al-Amoodi AS, Sakashita K, Ali AJ, Zhou R, Lee JM, Tehseen M, Li M, Belmonte JCI, Kusakabe T, Merzaban JS. Using Eukaryotic Expression Systems to Generate Human α1,3-Fucosyltransferases That Effectively Create Selectin-Binding Glycans on Stem Cells. Biochemistry 2020; 59:3757-3771. [PMID: 32901486 DOI: 10.1021/acs.biochem.0c00523] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Recruitment of circulating cells toward target sites is primarily dependent on selectin/ligand adhesive interactions. Glycosyltransferases are involved in the creation of selectin ligands on proteins and lipids. α1,3-Fucosylation is imperative for the creation of selectin ligands, and a number of fucosyltransferases (FTs) can modify terminal lactosamines on cells to create these ligands. One FT, fucosyltransferase VI (FTVI), adds a fucose in an α1,3 configuration to N-acetylglucosamine to generate sialyl Lewis X (sLex) epitopes on proteins of live cells and enhances their ability to bind E-selectin. Although a number of recombinant human FTVIs have been purified, apart from limited commercial enzymes, they were not characterized for their activity on live cells. Here we focused on establishing a robust method for producing FTVI that is active on living cells (hematopoietic cells and mesenchymal stromal cells). To this end, we used two expression systems, Bombyx mori (silkworm) and Pichia pastoris (yeast), to produce significant amounts of N-terminally tagged FTVI and demonstrated that these enzymes have superior activity when compared to currently available commercial enzymes that are produced from various expression systems. Overall, we outline a scheme for obtaining large amounts of highly active FTVI that can be used for the application of FTVI in enhancing the engraftment of cells lacking the sLex epitopes.
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Affiliation(s)
- Asma S Al-Amoodi
- Laboratory of Cell Migration and Signaling, Division of Biological and Environmental Sciences and Engineering Division, King Abdullah University of Science and Technology, 4700 KAUST, Thuwal, Jeddah 23955, Saudi Arabia
| | - Kosuke Sakashita
- Laboratory of Cell Migration and Signaling, Division of Biological and Environmental Sciences and Engineering Division, King Abdullah University of Science and Technology, 4700 KAUST, Thuwal, Jeddah 23955, Saudi Arabia
| | - Amal J Ali
- Laboratory of Cell Migration and Signaling, Division of Biological and Environmental Sciences and Engineering Division, King Abdullah University of Science and Technology, 4700 KAUST, Thuwal, Jeddah 23955, Saudi Arabia
| | - Ruoyu Zhou
- Laboratory of Insect Genome Science, Kyushu University Graduate School of Bioresource and Bioenvironmental Sciences, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan
| | - Jae Man Lee
- Laboratory of Insect Genome Science, Kyushu University Graduate School of Bioresource and Bioenvironmental Sciences, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan
| | - Muhammad Tehseen
- Laboratory of DNA Replication and Recombination, Division of Biological and Environmental Sciences and Engineering, King Abdullah University of Science and Technology, 4700 KAUST, Thuwal 23955, Saudi Arabia
| | - Mo Li
- Laboratory of Stem Cell and Regeneration, Biological and Environmental Science and Engineering Division, King Abdullah University of Science and Technology, Thuwal 23955, Saudi Arabia
| | - Juan Carlos I Belmonte
- Gene Expression Laboratory, Salk Institute for Biological Studies, 10010 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Takahiro Kusakabe
- Laboratory of Insect Genome Science, Kyushu University Graduate School of Bioresource and Bioenvironmental Sciences, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan
| | - Jasmeen S Merzaban
- Laboratory of Cell Migration and Signaling, Division of Biological and Environmental Sciences and Engineering Division, King Abdullah University of Science and Technology, 4700 KAUST, Thuwal, Jeddah 23955, Saudi Arabia
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28
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Mullerpatan A, Kane E, Ghosh R, Nascimento A, Andersen H, Cramer S, Karande P. Single-step purification of a small non-mAb biologic by peptide-ELP-based affinity precipitation. Biotechnol Bioeng 2020; 117:3775-3784. [PMID: 32813285 DOI: 10.1002/bit.27539] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2020] [Revised: 08/06/2020] [Accepted: 08/07/2020] [Indexed: 12/12/2022]
Abstract
Affinity precipitation using stimulus-responsive biopolymers such as elastin-like polypeptides (ELPs) have been successfully employed for the purification of monoclonal antibodies. In the current work, we extend these studies to the development of an ELP-peptide fusion for the affinity precipitation of the therapeutically relevant small non-mAb biologic, AdP. A 12-mer affinity peptide ligand (P10) was identified by a primary phage biopanning followed by a secondary in-solution fluorescence polarization screen. Peptide P10 and AdP interacted with a KD of 19.5 µM. A fusion of P10 with ELP was then shown to be successful in selectively capturing the biologic from a crude mixture. While pH shifts alone were not sufficient for product elution, the use of pH in concert with fluid-phase modifiers such as NaCl, arginine, or ethylene glycol was effective. In particular, the use of pH 8.5 and an arginine concentration of 500 mM enabled >80% product recovery. The overall process performance evaluated by sodium dodecyl sulfate-polyacrylamide gel electrophoresis and reversed-phase ultra-performance liquid chromatography analyses indicated successful single-step purification of the biologic from an Escherichia coli lysate resulting in ∼90% purity and >80% recovery. These results demonstrate that phage display can be readily employed to identify a peptide ligand capable of successfully carrying out the purification of a non-antibody biological product using ELP-based affinity precipitation.
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Affiliation(s)
- Akshat Mullerpatan
- The Howard P. Isermann Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute, Troy, New York.,Center for Biotechnology and Interdisciplinary Studies (CBIS), Rensselaer Polytechnic Institute, Troy, New York
| | - Erin Kane
- The Howard P. Isermann Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute, Troy, New York.,Center for Biotechnology and Interdisciplinary Studies (CBIS), Rensselaer Polytechnic Institute, Troy, New York
| | - Ronit Ghosh
- The Howard P. Isermann Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute, Troy, New York.,Center for Biotechnology and Interdisciplinary Studies (CBIS), Rensselaer Polytechnic Institute, Troy, New York
| | - André Nascimento
- Center for Biotechnology and Interdisciplinary Studies (CBIS), Rensselaer Polytechnic Institute, Troy, New York.,iBB-Institute for Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - Henrik Andersen
- Biologics Development, Global Product Development and Supply, Bristol Myers Squibb Company, Devens, Massachusetts
| | - Steven Cramer
- The Howard P. Isermann Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute, Troy, New York.,Center for Biotechnology and Interdisciplinary Studies (CBIS), Rensselaer Polytechnic Institute, Troy, New York
| | - Pankaj Karande
- The Howard P. Isermann Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute, Troy, New York.,Center for Biotechnology and Interdisciplinary Studies (CBIS), Rensselaer Polytechnic Institute, Troy, New York
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29
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Hornos F, Esquembre R, Gómez J. Competitive inhibition of protein adsorption to silica surfaces by their coating with high density charge polyelectrolytes. Colloids Surf B Biointerfaces 2020; 191:110993. [DOI: 10.1016/j.colsurfb.2020.110993] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 03/04/2020] [Accepted: 03/23/2020] [Indexed: 12/23/2022]
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Chakraborty R, Fan JS, Lai CC, Raghuvamsi PV, Chee PX, Anand GS, Yang D. Structural Basis of Oligomerization of N-Terminal Domain of Spider Aciniform Silk Protein. Int J Mol Sci 2020; 21:ijms21124466. [PMID: 32586030 PMCID: PMC7352312 DOI: 10.3390/ijms21124466] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Revised: 06/18/2020] [Accepted: 06/22/2020] [Indexed: 01/28/2023] Open
Abstract
Spider silk is self-assembled from water-soluble silk proteins through changes in the environment, including pH, salt concentrations, and shear force. The N-terminal domains of major and minor ampullate silk proteins have been found to play an important role in the assembly process through salt- and pH-dependent dimerization. Here, we identified the sequences of the N-terminal domains of aciniform silk protein (AcSpN) and major ampullate silk protein (MaSpN) from Nephila antipodiana (NA). Different from MaSpN, our biophysical characterization indicated that AcSpN assembles to form large oligomers, instead of a dimer, upon condition changes from neutral to acidic pH and/or from a high to low salt concentration. Our structural studies, by nuclear magnetic resonance spectroscopy and homology modelling, revealed that AcSpN and MaSpN monomers adopt similar overall structures, but have very different charge distributions contributing to the differential self-association features. The intermolecular interaction interfaces for AcSp oligomers were identified using hydrogen–deuterium exchange mass spectrometry and mutagenesis. On the basis of the monomeric structure and identified interfaces, the oligomeric structures of AcSpN were modelled. The structural information obtained will facilitate an understanding of silk fiber formation mechanisms for aciniform silk protein.
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Lago L, Thomas ORB, Roberts BR. Choice of mobile phase: Implications for size exclusion chromatography-inductively coupled plasma-mass spectrometry analyses of copper, zinc and iron metalloproteins. J Chromatogr A 2020; 1616:460806. [PMID: 31916987 DOI: 10.1016/j.chroma.2019.460806] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Revised: 12/16/2019] [Accepted: 12/17/2019] [Indexed: 11/25/2022]
Abstract
The correct identification of the metalloproteins present in human tissues and fluids is essential to our understanding of the cellular mechanisms underpinning a host of health disorders. Separation and analysis of biological samples are typically done via size exclusion chromatography hyphenated with inductively coupled plasma-mass spectrometry (SEC-ICP-MS). Although this technique can be extremely effective in identification of potential metalloproteins, the choice of mobile phase may have a marked effect on results, results by adversely affecting metal-protein bonds of the metalloproteins of interest. To assess the choice of mobile phase on SEC-ICP-MS resolution and the resulting metalloproteome pattern, we analysed several different sample types (brain homogenate; Cu/Zn-superoxide dismutase (SOD1); a molecular weight standard mix containing ferritin (Ft), ceruloplasmin (Cp), cytochrome c (CytC), vitamin B12 (B12) and thyroglobulin (Tg) using six different mobile phase conditions (200 mM, pH 7.5 solutions of ammonium salts nitrate, acetate, and sulfate; HEPES, MOPS and Tris-HCl). Our findings suggest that ammonium nitrate, ammonium acetate and Tris-HCl are optimal choices for the mobile phase, with the specific choice being dependent on both the number of samples and method of detection that is hyphenated with separation. Furthermore, we found that MOPS, HEPES and ammonium sulfate mobile phases all caused significant changes to peak resolution, retention time and overall profile shape. MOPS and HEPES, in particular, produced additional Fe peaks that were not detected with any of the other mobile phases that were investigated. As well as this, MOPS and HEPES both caused significant concentration dependent matrix suppression of the internal standard.
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Affiliation(s)
- Larissa Lago
- The Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Kenneth Myer Building, 30 Royal Parade, Parkville, Victoria, 3052, Australia
| | - Oliver R B Thomas
- School of BioSciences, The University of Melbourne, BioSciences 4, Royal Parade, Parkville, Victoria, 3052, Australia
| | - Blaine R Roberts
- Department of Biochemistry, Emory University School of Medicine, Atlanta, GA, 30322 USA.
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Srikoti M, Bolgar MS, Kazakevich Y. Hybrid mode of hydrophobic interaction chromatography of monoclonal antibodies and related biomolecules: Influence of elution conditions on chromatographic performance using poly (alkyl aspartamide) silica columns. J Chromatogr B Analyt Technol Biomed Life Sci 2020; 1140:121984. [DOI: 10.1016/j.jchromb.2020.121984] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Revised: 01/09/2020] [Accepted: 01/13/2020] [Indexed: 11/24/2022]
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Wang JL, Zhao L, Li MQ, Chen WG, Xu CJ. A sensitive and reversible staining of proteins on blot membranes. Anal Biochem 2020; 592:113579. [PMID: 31926891 DOI: 10.1016/j.ab.2020.113579] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Revised: 01/04/2020] [Accepted: 01/06/2020] [Indexed: 10/25/2022]
Abstract
A modified, sensitive and reversible method for protein staining on nitrocellulose (NC) and polyvinylidine fluoride (PVDF) membranes was developed in Western blotting. The method employed Congo red staining to visualize proteins on different blot membranes. Staining of proteins with Congo red dye is more faster procedures. According to the experimental results, approximate 20 ng proteins could be detected in 3 min in room temperature. The staining on the proteins is easily reversible with Congo red destaining solution for NC and PVDF membranes, so that the blot membranes can be reused for Western blotting. In addition, we confirmed that the staining method is fully compatible with Western blot detection. NC and PVDF membranes treatment with Congo red staining does not interfere with conventional chemiluminescent substrates of peroxidase. As compared to MemCode reversible protein stain kits from Pirece Biotechnology, the staining technique is more sensitive, lower of cost, convenient and not adversely affecting subsequent Western blotting results. On the other hand, the stain is more sensitive than the Ponceau S staining. Therefore, Congo red staining is a promising and ideal alternative for current protein stain. Besides, the binding modes of Congo red or Ponceau S stain were investigated using various 2D and 3D molecular docking and demonstrated potential molecular basis for sensitivity of Congo red staining are higher than Ponceau S.
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Affiliation(s)
- Jun-Ling Wang
- Center for Reproductive Medicine, Affiliated Hospital 1 of Wenzhou Medical University, Wenzhou, Zhejiang, 325000, PR China.
| | - Li Zhao
- School of 2nd clinical Medical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, 325035, PR China.
| | - Mei-Qi Li
- School of 2nd clinical Medical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, 325035, PR China.
| | - Wei-Guang Chen
- Department of Histology & Embryology, School of Basic Medical Science, Wenzhou Medical University, Wenzhou, Zhejiang, 325035, PR China.
| | - Chao-Jin Xu
- Department of Histology & Embryology, School of Basic Medical Science, Wenzhou Medical University, Wenzhou, Zhejiang, 325035, PR China.
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Lavoie RA, Fazio A, Williams TI, Carbonell R, Menegatti S. Targeted capture of Chinese hamster ovary host cell proteins: Peptide ligand binding by proteomic analysis. Biotechnol Bioeng 2019; 117:438-452. [DOI: 10.1002/bit.27213] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Revised: 09/04/2019] [Accepted: 10/21/2019] [Indexed: 01/06/2023]
Affiliation(s)
- R. Ashton Lavoie
- Department of Chemical and Biomolecular EngineeringNorth Carolina State UniversityRaleigh North Carolina
| | - Alice Fazio
- Department of Chemical and Biomolecular EngineeringNorth Carolina State UniversityRaleigh North Carolina
| | - Taufika Islam Williams
- Molecular Education, Technology, and Research Innovation Center (METRIC)North Carolina State UniversityRaleigh North Carolina
| | - Ruben Carbonell
- Department of Chemical and Biomolecular EngineeringNorth Carolina State UniversityRaleigh North Carolina
- Biomanufacturing Training and Education Center (BTEC)North Carolina State UniversityRaleigh North Carolina
- The National Institute for Innovation in Manufacturing Biopharmaceuticals (NIIMBL)Newark Delaware
| | - Stefano Menegatti
- Department of Chemical and Biomolecular EngineeringNorth Carolina State UniversityRaleigh North Carolina
- Biomanufacturing Training and Education Center (BTEC)North Carolina State UniversityRaleigh North Carolina
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Moringo NA, Bishop LDC, Shen H, Misiura A, Carrejo NC, Baiyasi R, Wang W, Ye F, Robinson JT, Landes CF. A mechanistic examination of salting out in protein-polymer membrane interactions. Proc Natl Acad Sci U S A 2019; 116:22938-22945. [PMID: 31659038 PMCID: PMC6859367 DOI: 10.1073/pnas.1909860116] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Developing a mechanistic understanding of protein dynamics and conformational changes at polymer interfaces is critical for a range of processes including industrial protein separations. Salting out is one example of a procedure that is ubiquitous in protein separations yet is optimized empirically because there is no mechanistic description of the underlying interactions that would allow predictive modeling. Here, we investigate peak narrowing in a model transferrin-nylon system under salting out conditions using a combination of single-molecule tracking and ensemble separations. Distinct surface transport modes and protein conformational changes at the negatively charged nylon interface are quantified as a function of salt concentration. Single-molecule kinetics relate macroscale improvements in chromatographic peak broadening with microscale distributions of surface interaction mechanisms such as continuous-time random walks and simple adsorption-desorption. Monte Carlo simulations underpinned by the stochastic theory of chromatography are performed using kinetic data extracted from single-molecule observations. Simulations agree with experiment, revealing a decrease in peak broadening as the salt concentration increases. The results suggest that chemical modifications to membranes that decrease the probability of surface random walks could reduce peak broadening in full-scale protein separations. More broadly, this work represents a proof of concept for combining single-molecule experiments and a mechanistic theory to improve costly and time-consuming empirical methods of optimization.
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Affiliation(s)
| | | | - Hao Shen
- Department of Chemistry, Rice University, Houston, TX 77251
| | | | | | - Rashad Baiyasi
- Department of Electrical and Computer Engineering, Rice University, Houston, TX 77251
| | - Wenxiao Wang
- Department of Electrical and Computer Engineering, Rice University, Houston, TX 77251
| | - Fan Ye
- Department of Electrical and Computer Engineering, Rice University, Houston, TX 77251
| | - Jacob T Robinson
- Department of Electrical and Computer Engineering, Rice University, Houston, TX 77251
- Department of Bioengineering, Rice University, Houston, TX 77251
| | - Christy F Landes
- Department of Chemistry, Rice University, Houston, TX 77251;
- Department of Electrical and Computer Engineering, Rice University, Houston, TX 77251
- Smalley-Curl Institute, Rice University, Houston, TX 77251
- Department of Chemical and Biomolecular Engineering, Rice University, Houston, TX 77251
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Ghosh S, T D, Baul U, Vemparala S. Aggregation dynamics of charged peptides in water: Effect of salt concentration. J Chem Phys 2019; 151:074901. [DOI: 10.1063/1.5100890] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Affiliation(s)
- Susmita Ghosh
- The Institute of Mathematical Sciences, C.I.T. Campus, Taramani, Chennai 600113, India
- Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400094, India
| | - Devanand T
- The Institute of Mathematical Sciences, C.I.T. Campus, Taramani, Chennai 600113, India
- Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400094, India
| | - Upayan Baul
- Institue of Physics, Albert-Ludwigs-University of Freiburg, Hermann-Herder-Strasse 3, 79104 Freiburg, Germany
| | - Satyavani Vemparala
- The Institute of Mathematical Sciences, C.I.T. Campus, Taramani, Chennai 600113, India
- Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400094, India
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Osuna-Amarillas PS, Rouzaud-Sandez O, Higuera-Barraza OA, Arias-Moscoso JL, López-Mata MA, Campos-García JC, Valdez-Melchor RG. Cromatografía de interacción hidrofóbica como método de separación de proteasas alcalinas de vísceras de Scomberomorus sierra. TIP REVISTA ESPECIALIZADA EN CIENCIAS QUÍMICO-BIOLÓGICAS 2019. [DOI: 10.22201/fesz.23958723e.2019.0.183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Este estudio se enfocó en recuperar proteasas alcalinas de vísceras de Scomberomorus sierra mediante cromatografía de interacción hidrofóbica. Tres proteasas alcalinas se lograron separar parcialmente usando esta técnica cromatográfica; dos de ellas con pesos moleculares de 19 y 31 kDa fueron identificadas como enzimas tipo tripsina de acuerdo a ensayos de inhibición. La proteasa alcalina con peso molecular de 31 kDa, única enzima aislada, fue purificada bajo las siguientes condiciones cromatográficas: sulfato de amonio l3% (p/v) y etilenglicol al 27% (p/v); esta enzima mostró actividad máxima a pH 9 – 10 y 50 – 60 °C y fue fuertemente inhibida por el inhibidor de tripsina de soya (SBTI) como por el inhibidor de tripsina porcina (TPI). Una tercera proteasa alcalina con peso molecular de 20 kDa fue parcialmente separada e inhibida por tosil fenilalanil clorometil cetona (TPCK), la cual mostró actividad óptima a pH 9 – 11 y 60 °C. Estos resultados muestran que las vísceras de Scomberomorus sierra podrían ser de utilidad como fuente de proteasas.
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Rosa SASL, Wagner A, da Silva CL, Aires-Barros MR, Azevedo AM, Dias-Cabral AC. Mobile-Phase Modulators as Salt Tolerance Enhancers in Phenylboronate Chromatography: Thermodynamic Evaluation of the Mechanisms Underlying the Adsorption of Monoclonal Antibodies. Biotechnol J 2019; 14:e1800586. [PMID: 31305007 DOI: 10.1002/biot.201800586] [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: 01/27/2019] [Revised: 06/12/2019] [Indexed: 11/06/2022]
Abstract
Phenylboronate chromatography has been employed for bioseparation applications though details concerning the mechanisms of interaction between the ligand and macromolecules remain widely unknown. Here, the phenomena underlying the adsorption of an anti-human interleukin-8 (anti-IL8) monoclonal antibody (mAb) onto an m-aminophenylboronic acid (m-APBA) ligand in the presence of different mobile-phase modulators (NaF/MgCl 2 /(NH 4 ) 2 SO 4 ) and under different pH values (7.5/8.5/9.0) is investigated. Flow microcalorimetry (FMC) is applied to measure instantaneous heat energy transfer, providing insights about the role of specific and nonspecific interactions involved in the adsorptive process. Results show that the adsorption of anti-IL8 mAb to m-APBA is enthalpically driven, corroborating the presence of the reversible esterification reaction between boronic acid or boronates and cis-diol-containing molecules. Nevertheless, for all mobile-phase modulators studied, changes in thermogram profiles are observed as well as reductions in the net heat of adsorption when increasing the pH. Overall, FMC and parallel chromatographic experiments data suggest that ligand salt tolerance could be enhanced using mobile-phase modulators, with all salts studied promoting the specific cis-diol interactions and reducing nonspecific interactions. The last feature is more noticeable at pH values above ligand's pK a , mainly due to the ability of NaF and (NH 4 ) 2 SO 4 to diminish electrostatic interactions when compared to the commonly used NaCl.
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Affiliation(s)
- Sara A S L Rosa
- Department of Bioengineering, iBB-Institute for Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais 1, 1049-001, Lisboa, Portugal
| | - Alexandra Wagner
- Department of Bioengineering, iBB-Institute for Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais 1, 1049-001, Lisboa, Portugal
| | - Cláudia L da Silva
- Department of Bioengineering, iBB-Institute for Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais 1, 1049-001, Lisboa, Portugal.,The Discoveries Centre for Regenerative and Precision Medicine, Lisbon Campus, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais 1, 1049-001, Lisboa, Portugal
| | - Maria R Aires-Barros
- Department of Bioengineering, iBB-Institute for Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais 1, 1049-001, Lisboa, Portugal
| | - Ana M Azevedo
- Department of Bioengineering, iBB-Institute for Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais 1, 1049-001, Lisboa, Portugal
| | - Ana C Dias-Cabral
- CICS-UBI-Health Sciences Research Centre, University of Beira Interior, Avenida Infante D. Henrique, 6200-506, Covilhã, Portugal.,Department of Chemistry, University of Beira Interior, Rua Marquês D'Ávila e Bolama, 6201-001, Covilhã, Portugal
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Penk A, Baumann L, Huster D, Samsonov SA. NMR and molecular modeling reveal specificity of the interactions between CXCL14 and glycosaminoglycans. Glycobiology 2019; 29:715-725. [DOI: 10.1093/glycob/cwz047] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Revised: 06/25/2019] [Accepted: 06/25/2019] [Indexed: 12/13/2022] Open
Abstract
Abstract
CXCL14, chemokine (C-X-C motif) ligand 14, is a novel highly conserved chemokine with unique features. Despite exhibiting the typical chemokine fold, it has a very short N-terminus of just two amino acid residues responsible for chemokine receptor activation. CXCL14 actively participates in homeostatic immune surveillance of skin and mucosae, is linked to metabolic disorders and fibrotic lung diseases and possesses strong anti-angiogenic properties in early tumor development. In this work, we investigated the interaction of CXCL14 with various glycosaminoglycans (GAGs) by nuclear magnetic resonance spectroscopy, microscale thermophoresis, analytical heparin (HE) affinity chromatography and in silico approaches to understand the molecular basis of GAG-binding. We observed different GAG-binding modes specific for the GAG type used in the study. In particular, the CXCL14 epitope for HE suggests a binding pose distinguishable from the ones of the other GAGs investigated (hyaluronic acid, chondroitin sulfate-A/C, −D, dermatan sulfate). This observation is also supported by computational methods that included molecular docking, molecular dynamics and free energy calculations. Based on our results, we suggest that distinct GAG sulfation patterns confer specificity beyond simple electrostatic interactions usually considered to represent the driving forces in protein–GAG interactions. The CXCL14–GAG system represents a promising approach to investigate the specificity of GAG–protein interactions, which represents an important topic for developing the rational approaches to novel strategies in regenerative medicine.
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Affiliation(s)
- Anja Penk
- Institute for Medical Physics and Biophysics, Leipzig University, Härtelstr. Leipzig, Germany
| | - Lars Baumann
- Institute for Medical Physics and Biophysics, Leipzig University, Härtelstr. Leipzig, Germany
| | - Daniel Huster
- Institute for Medical Physics and Biophysics, Leipzig University, Härtelstr. Leipzig, Germany
| | - Sergey A Samsonov
- Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, Gdańsk, Poland
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41
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Hydrophobic-interaction chromatography for purification of influenza A and B virus. J Chromatogr B Analyt Technol Biomed Life Sci 2019; 1117:103-117. [DOI: 10.1016/j.jchromb.2019.03.037] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Revised: 03/28/2019] [Accepted: 03/29/2019] [Indexed: 11/17/2022]
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Singh N, Herzer S. Downstream Processing Technologies/Capturing and Final Purification : Opportunities for Innovation, Change, and Improvement. A Review of Downstream Processing Developments in Protein Purification. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2019; 165:115-178. [PMID: 28795201 DOI: 10.1007/10_2017_12] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Increased pressure on upstream processes to maximize productivity has been crowned with great success, although at the cost of shifting the bottleneck to purification. As drivers were economical, focus is on now on debottlenecking downstream processes as the main drivers of high manufacturing cost. Devising a holistically efficient and economical process remains a key challenge. Traditional and emerging protein purification strategies with particular emphasis on methodologies implemented for the production of recombinant proteins of biopharmaceutical importance are reviewed. The breadth of innovation is addressed, as well as the challenges the industry faces today, with an eye to remaining impartial, fair, and balanced. In addition, the scope encompasses both chromatographic and non-chromatographic separations directed at the purification of proteins, with a strong emphasis on antibodies. Complete solutions such as integrated USP/DSP strategies (i.e., continuous processing) are discussed as well as gains in data quantity and quality arising from automation and high-throughput screening (HTS). Best practices and advantages through design of experiments (DOE) to access a complex design space such as multi-modal chromatography are reviewed with an outlook on potential future trends. A discussion of single-use technology, its impact and opportunities for further growth, and the exciting developments in modeling and simulation of DSP rounds out the overview. Lastly, emerging trends such as 3D printing and nanotechnology are covered. Graphical Abstract Workflow of high-throughput screening, design of experiments, and high-throughput analytics to understand design space and design space boundaries quickly. (Reproduced with permission from Gregory Barker, Process Development, Bristol-Myers Squibb).
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Affiliation(s)
- Nripen Singh
- Bristol-Myers Squibb, Global Manufacturing and Supply, Devens, MA, 01434, USA.
| | - Sibylle Herzer
- Bristol-Myers Squibb, Global Manufacturing and Supply, Hopewell, NJ, 01434, USA
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The adequate amount of sodium chloride in Protein A wash buffer for effective host cell protein clearance. Protein Expr Purif 2019; 158:59-64. [PMID: 30825515 DOI: 10.1016/j.pep.2019.02.016] [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: 12/20/2018] [Revised: 02/19/2019] [Accepted: 02/27/2019] [Indexed: 11/21/2022]
Abstract
Post-load column wash in Protein A chromatography can effectively improve host cell protein (HCP) clearance. A commonly used wash additive for this purpose is sodium chloride. However, the adequate amount of sodium chloride required for effective HCP clearance is less consistent in literature. In this study we investigated the impact of different amounts of sodium chloride on HCP clearance with five monoclonal antibodies (mAbs). For each mAb, elution pool HCP levels from runs under different wash conditions are compared. For all five mAbs, the data suggested that 250 mM would be an adequate amount for the salt to largely achieve its HCP reducing effect. The same conclusion is also reached for calcium chloride, a less commonly used but equally effective Protein A wash additive for HCP clearance.
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Sinha A, Tai TY, Li KH, Gopinathan P, Chung YD, Sarangadharan I, Ma HP, Huang PC, Shiesh SC, Wang YL, Lee GB. An integrated microfluidic system with field-effect-transistor sensor arrays for detecting multiple cardiovascular biomarkers from clinical samples. Biosens Bioelectron 2019; 129:155-163. [PMID: 30703568 DOI: 10.1016/j.bios.2019.01.001] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 01/03/2019] [Indexed: 12/29/2022]
Abstract
Certain blood-borne biomarkers offer a potent methodology for understanding the risk of cardiovascular diseases (CVDs) with clinicians generally advocating the use of multiple biomarkers for proper risk assessment of CVDs. Herein four such CVDs biomarkers- C-reactive protein (CRP), N-terminal pro b-type natriuretic peptide (NT-proBNP), cardiac troponin I (cTnI), and fibrinogen- were rapidly (5 min) analyzed from clinical samples (~ 4 µL) on an integrated microfluidic platform equipped with 1) immobilized highly specific aptamer probes and 2) field-effect transistor (FET)-based sensor arrays. The calibration curve from the FET sensor arrays showed good agreement in the physiological concentration ranges for CRP (0.1-50 mg/L), NT-proBNP (50-10,000 pg/mL), cTnI (1-10,000 pg/mL), and fibrinogen (0.1-5 mg/mL). The developed prototype of this fully automated portable device requires minimal reagent and sample inputs and consequently shows great promise for next-generation point-of-care devices assaying multiple CVDs biomarkers in clinical samples.
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Affiliation(s)
- Anirban Sinha
- Institute of NanoEngineering and Microsystems, National Tsing Hua University, Hsinchu, Taiwan
| | - Tse-Yu Tai
- Institute of NanoEngineering and Microsystems, National Tsing Hua University, Hsinchu, Taiwan
| | - Kuang-Hsien Li
- Department of Electrical Engineering, National Tsing Hua University, Hsinchu, Taiwan
| | - Priya Gopinathan
- Institute of NanoEngineering and Microsystems, National Tsing Hua University, Hsinchu, Taiwan
| | - Yi-Da Chung
- Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu, Taiwan
| | - Indu Sarangadharan
- Institute of NanoEngineering and Microsystems, National Tsing Hua University, Hsinchu, Taiwan
| | - Hsi-Pin Ma
- Department of Electrical Engineering, National Tsing Hua University, Hsinchu, Taiwan
| | - Po-Chiun Huang
- Department of Electrical Engineering, National Tsing Hua University, Hsinchu, Taiwan
| | - Shu-Chu Shiesh
- Department of Medical Laboratory Science and Biotechnology, National Cheng Kung University, Tainan, Taiwan
| | - Yu-Lin Wang
- Institute of NanoEngineering and Microsystems, National Tsing Hua University, Hsinchu, Taiwan; Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu, Taiwan.
| | - Gwo-Bin Lee
- Institute of NanoEngineering and Microsystems, National Tsing Hua University, Hsinchu, Taiwan; Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu, Taiwan; Institute of Biomedical Engineering, National Tsing Hua University, Hsinchu, Taiwan.
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Rosa SA, da Silva C, Aires-Barros MR, Dias-Cabral A, Azevedo AM. Thermodynamics of the adsorption of monoclonal antibodies in phenylboronate chromatography: Affinity versus multimodal interactions. J Chromatogr A 2018; 1569:118-127. [DOI: 10.1016/j.chroma.2018.07.050] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Revised: 07/02/2018] [Accepted: 07/16/2018] [Indexed: 10/28/2022]
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46
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Wang Z, Li Y, Song P, Wang X. NaCl cleaning of 0.1 μm polyvinylidene fluoride (PVDF) membrane fouled with humic acid (HA). Chem Eng Res Des 2018. [DOI: 10.1016/j.cherd.2018.01.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Turner A, Yandrofski K, Telikepalli S, King J, Heckert A, Filliben J, Ripple D, Schiel JE. Development of orthogonal NISTmAb size heterogeneity control methods. Anal Bioanal Chem 2018; 410:2095-2110. [PMID: 29428991 PMCID: PMC5830496 DOI: 10.1007/s00216-017-0819-3] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2017] [Revised: 11/03/2017] [Accepted: 12/08/2017] [Indexed: 12/13/2022]
Abstract
The NISTmAb is a monoclonal antibody Reference Material from the National Institute of Standards and Technology; it is a class-representative IgG1κ intended to serve as a pre-competitive platform for harmonization and technology development in the biopharmaceutical industry. The publication series of which this paper is a part describes NIST's overall control strategy to ensure NISTmAb quality and availability over its lifecycle. In this paper, the development of a control strategy for monitoring NISTmAb size heterogeneity is described. Optimization and qualification of size heterogeneity measurement spanning a broad size range are described, including capillary electrophoresis-sodium dodecyl sulfate (CE-SDS), size exclusion chromatography (SEC), dynamic light scattering (DLS), and flow imaging analysis. This paper is intended to provide relevant details of NIST's size heterogeneity control strategy to facilitate implementation of the NISTmAb as a test molecule in the end user's laboratory. Graphical abstract Representative size exclusion chromatogram of the NIST monoclonal antibody (NISTmAb). The NISTmAb is a publicly available research tool intended to facilitate advancement of biopharmaceutical analytics. HMW = high molecular weight (trimer and dimer), LMW = low molecular weight (2 fragment peaks). Peak labeled buffer is void volume of the column from L-histidine background buffer.
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MESH Headings
- Animals
- Antibodies, Monoclonal/analysis
- Antibodies, Monoclonal/chemistry
- Antibodies, Monoclonal, Humanized/analysis
- Antibodies, Monoclonal, Humanized/chemistry
- Chromatography, Gel/methods
- Chromatography, Gel/standards
- Dynamic Light Scattering/methods
- Dynamic Light Scattering/standards
- Electrophoresis, Capillary/methods
- Electrophoresis, Capillary/standards
- Humans
- Immunoglobulin G/analysis
- Immunoglobulin G/chemistry
- Limit of Detection
- Mice
- Models, Molecular
- Protein Aggregates
- Quality Control
- Reference Standards
- Sodium Dodecyl Sulfate/chemistry
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Affiliation(s)
- Abigail Turner
- National Institute of Standards and Technology, Institute for Bioscience and Biotechnology Research, 9600 Gudelsky Dr, Rockville, MD, 20850, USA
- MedImmune, LLC, 55 Watkins Mill Rd, Gaithersburg, MD, 20878, USA
| | - Katharina Yandrofski
- National Institute of Standards and Technology, Institute for Bioscience and Biotechnology Research, 9600 Gudelsky Dr, Rockville, MD, 20850, USA
| | - Srivalli Telikepalli
- National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, MD, 20899, USA
| | - Jason King
- National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, MD, 20899, USA
| | - Alan Heckert
- National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, MD, 20899, USA
| | - James Filliben
- National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, MD, 20899, USA
| | - Dean Ripple
- National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, MD, 20899, USA
| | - John E Schiel
- National Institute of Standards and Technology, Institute for Bioscience and Biotechnology Research, 9600 Gudelsky Dr, Rockville, MD, 20850, USA.
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48
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Guo S, Pranantyo D, Kang ET, Loh XJ, Zhu X, Jańczewski D, Neoh KG. Dominant Albumin-Surface Interactions under Independent Control of Surface Charge and Wettability. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:1953-1966. [PMID: 29319318 DOI: 10.1021/acs.langmuir.7b04117] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Understanding protein adsorption behaviors on solid surfaces constitutes an important step toward development of efficacious and biocompatible medical devices. Both surface charge and wettability have been shown to influence protein adsorption attributes, including kinetics, quantities, deformation, and reversibility. However, determining the dominant interaction in these surface-induced phenomena is challenging because of the complexity of inter-related mechanisms at the liquid/solid interface. Herein, we reveal the dominant interfacial forces in these essential protein adsorption attributes under the influence of a combination of surface charge and wettability, using quartz crystal microbalance with dissipation monitoring and atomic force microscopy-based force spectroscopy on a series of model surfaces. These surfaces were fabricated via layer-by-layer assembly, which allowed two-dimensional control of surface charge and wettability with minimal cross-parameter dependency. We focused on a soft globular protein, bovine serum albumin (BSA), which is prone to conformational changes during adsorption. The information obtained from the two techniques shows that both surface charge and hydrophobicity can increase the protein-surface interaction forces and the adsorbed amount. However, surface hydrophobicity triggered a greater extent of deformation in the adsorbed BSA molecules, leading to more dehydration, spreading, and resistance to elution by ionic strength changes regardless of the surface charge. The role played by the surface charge in the adsorbed protein conformation and extent of desorption induced by changes in the ionic strength is secondary to that of surface hydrophobicity. These findings advance the understanding of how surface chemistry and properties can be tailored for directing protein-substrate interactions.
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Affiliation(s)
- Shanshan Guo
- NUS Graduate School for Integrative Science and Engineering, National University of Singapore , Kent Ridge, 117576, Singapore
| | - Dicky Pranantyo
- Department of Chemical and Biomolecular Engineering, National University of Singapore , 4 Engineering Drive 4, 119260, Singapore
| | - En-Tang Kang
- Department of Chemical and Biomolecular Engineering, National University of Singapore , 4 Engineering Drive 4, 119260, Singapore
| | - Xian Jun Loh
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research) , 2 Fusionopolis Way, 138634, Singapore
- Department of Materials Science and Engineering, National University of Singapore , 9 Engineering Drive 1, 117576, Singapore
- Singapore Eye Research Institute , 11 Third Hospital Avenue, 168751, Singapore
| | - Xiaoying Zhu
- Department of Environmental Science, Zhejiang University , Hangzhou 310058, China
| | - Dominik Jańczewski
- Laboratory of Technological Processes, Faculty of Chemistry, Warsaw University of Technology , Noakowskiego 3, 00-664 Warsaw, Poland
| | - Koon Gee Neoh
- NUS Graduate School for Integrative Science and Engineering, National University of Singapore , Kent Ridge, 117576, Singapore
- Department of Chemical and Biomolecular Engineering, National University of Singapore , 4 Engineering Drive 4, 119260, Singapore
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49
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M13 bacteriophage purification using poly(ionic liquids) as alternative separation matrices. J Chromatogr A 2018; 1532:246-250. [DOI: 10.1016/j.chroma.2017.12.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Revised: 11/17/2017] [Accepted: 12/04/2017] [Indexed: 02/06/2023]
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50
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Johnson SA, Walsh A, Brown MR, Lute SC, Roush DJ, Burnham MS, Brorson KA. The step-wise framework to design a chromatography-based hydrophobicity assay for viral particles. J Chromatogr B Analyt Technol Biomed Life Sci 2017; 1061-1062:430-437. [DOI: 10.1016/j.jchromb.2017.08.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Revised: 07/26/2017] [Accepted: 08/02/2017] [Indexed: 02/06/2023]
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