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Prabhala SV, Wood DW. Scalable dual column cation exchange affinity chromatography based platform process for recombinant protein purification. Protein Expr Purif 2024; 217:106442. [PMID: 38336119 DOI: 10.1016/j.pep.2024.106442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 12/20/2023] [Accepted: 02/06/2024] [Indexed: 02/12/2024]
Abstract
A novel tandem affinity tag is presented that enables the use of cation exchange resins for initial affinity purification, followed by an additional column step for enhanced purity and affinity tag self-removal. In this method, the highly charged heparin-binding tag binds strongly and selectively to either a strong or weak cation exchange resin based on electrostatic interactions, effectively acting as an initial affinity tag. Combining the heparin-binding tag (HB-tag) with the self-removing iCapTag™ provides a means for removing both tags in a subsequent self-cleaving step. The result is a convenient platform for the purification of diverse tagless proteins with a range of isoelectric points and molecular weights. In this work, we demonstrate a dual column process in which the tagged protein of interest is first captured from an E. coli cell lysate using a cation exchange column via a fused heparin-binding affinity tag. The partially purified protein is then diluted and loaded onto an iCapTag™ split-intein column, washed, and then incubated overnight to release the tagless target protein from the bound tag. Case studies are provided for enhanced green fluorescent protein (eGFP), beta galactosidase (βgal), maltose binding protein (MBP) and beta lactamase (βlac), where overall purity and host cell DNA clearance is provided. Overall, the proposed dual column process is shown to be a scalable platform technology capable of accessing both the high dynamic binding capacity of ion exchange resins and the high selectivity of affinity tags for the purification of recombinant proteins.
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Affiliation(s)
- Sai Vivek Prabhala
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 460C CBEC Building, 151 W. Woodruff Ave., Columbus, OH, 43210, USA.
| | - David W Wood
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 460C CBEC Building, 151 W. Woodruff Ave., Columbus, OH, 43210, USA.
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2
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Nagase K. Bioanalytical technologies using temperature-responsive polymers. ANAL SCI 2024; 40:827-841. [PMID: 38584205 PMCID: PMC11035477 DOI: 10.1007/s44211-024-00545-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Accepted: 02/24/2024] [Indexed: 04/09/2024]
Abstract
In recent decades, various bioanalytical technologies have been investigated for appropriate medical treatment and effective therapy. Temperature-responsive chromatography is a promising bioanalytical technology owing to its functional properties. Temperature-responsive chromatography uses a poly(N-isopropylacrylamide)(PNIPAAm) modified stationary phase as the column packing material. The hydrophobic interactions between PNIPAAm and the analyte could be modulated by changing the column temperature because of the temperature-responsive hydrophobicity of PNIPAAm. Thus, the chromatography system does not require organic solvents in the mobile phase, making it suitable for therapeutic drug monitoring in medical settings such as hospitals. This review summarizes recent developments in temperature-responsive chromatography systems for therapeutic drug monitoring applications. In addition, separation methods for antibody drugs using PNIPAAm are also summarized because these methods apply to the therapeutic drug monitoring of biopharmaceutics. The temperature-responsive chromatography systems can also be utilized for clinical diagnosis, as they can assess multiple medicines simultaneously. This highlights the significant potential of temperature-responsive chromatography in medicine and healthcare.
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Affiliation(s)
- Kenichi Nagase
- Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima, 734-8553, Japan.
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato, Tokyo, 105-8512, Japan.
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3
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Qian X, Ma C, Zhang H, Liu K. Bioseparation of rare earth elements and high value-added biomaterials applications. Bioorg Chem 2024; 143:107040. [PMID: 38141331 DOI: 10.1016/j.bioorg.2023.107040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 11/24/2023] [Accepted: 12/15/2023] [Indexed: 12/25/2023]
Abstract
Rare earth elements (REEs) are a group of critical minerals and extensively employed in new material manufacturing. However, separation of lanthanides is difficult because of their similar chemical natures. Current lanthanide leaching and separation methods require hazardous compounds, resulting in severe environmental concerns. Bioprocessing of lanthanides offers an emerging class of tools for REE separation due to mild leaching conditions and highly selective separation scenarios. In the course of biopreparation, engineered microbes not only dissolve REEs from ores but also allow for selective separation of the lanthanides. In this review, we present an overview of recent advances in microbes and proteins used for the biomanufacturing of lanthanides and discuss high value-added applications of REE-derived biomaterials. We begin by introducing the fundamental interactions between natural microbes and REEs. Then we discuss the rational design of chassis microbes for bioleaching and biosorption. We also highlight the investigations on REE binding proteins and their applications in the synthesis of high value-added biomaterials. Finally, future opportunities and challenges for the development of next generation lanthanide-binding biological systems are discussed.
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Affiliation(s)
- Xining Qian
- Engineering Research Center of Advanced Rare Earth Materials (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Chao Ma
- Engineering Research Center of Advanced Rare Earth Materials (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, China; Xiangfu Laboratory, Building 5, No.828 Zhongxing Road, Xitang Town, Jiashan, Jiaxing, Zhejiang 314102, China.
| | - Hongjie Zhang
- Engineering Research Center of Advanced Rare Earth Materials (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, China; Xiangfu Laboratory, Building 5, No.828 Zhongxing Road, Xitang Town, Jiashan, Jiaxing, Zhejiang 314102, China
| | - Kai Liu
- Engineering Research Center of Advanced Rare Earth Materials (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, China; Xiangfu Laboratory, Building 5, No.828 Zhongxing Road, Xitang Town, Jiashan, Jiaxing, Zhejiang 314102, China
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Shukla P, Srivastava P, Mishra A. Downstream process intensification for biotechnologically generated hyaluronic acid: Purification and characterization. J Biosci Bioeng 2023; 136:232-238. [PMID: 37393187 DOI: 10.1016/j.jbiosc.2023.06.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Revised: 06/05/2023] [Accepted: 06/08/2023] [Indexed: 07/03/2023]
Abstract
Hyaluronic acid (HA), an anionic, non-sulfated glycosaminoglycan, has several clinical applications. This study examines several downstream methods for purifying HA with maximum recovery and purity. Following the fermentation of Streptococcus zooepidemicus MTCC 3523 to produce HA, the broth was thoroughly purified to separate cell debris and insoluble impurities using a filtration procedure and a variety of adsorbents for soluble impurities. Nucleic acids, proteins with high molecular weight, were successfully removed from the broth using activated carbons and XAD-7 resins. In contrast, insoluble and low molecular weight impurities were removed using diafiltration, with HA recovery of 79.16% and purity close to 90%. Different analytical and characterization procedures such as Fourier transform-infrared spectroscopy, X-ray diffraction, nuclear magnetic resonance, and scanning electron microscopy validated the presence, purity, and structure of HA. Microbial HA showed activity in tests for 2,2-diphenyl-1-picryl-hydrazyl-hydrate (DPPH) radical-scavenging (4.87 ± 0.45 kmol TE/g), total antioxidant capacity (13.32 ± 0.52%), hydroxyl radical-scavenging (32.03 ± 0.12%), and reducing power (24.85 ± 0.45%). The outcomes showed that the precipitation, adsorption, and diafiltration processes are suitable for extracting HA from a fermented broth under the chosen operating conditions. The HA produced was of pharmaceutical grade for non-injectable applications.
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Affiliation(s)
- Priya Shukla
- School of Biochemical Engineering, Indian Institute of Technology (Banaras Hindu University), 221005 Varanasi, India.
| | - Pradeep Srivastava
- School of Biochemical Engineering, Indian Institute of Technology (Banaras Hindu University), 221005 Varanasi, India.
| | - Abha Mishra
- School of Biochemical Engineering, Indian Institute of Technology (Banaras Hindu University), 221005 Varanasi, India.
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5
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Zheng H, Wei F, Tian J, Wang C, Xue C. Preparation of nickel-chelated iminodiacetate-functionalized macroporous agarose monolith using modular and clickable building blocks for affinity separation of histidine-tagged recombinant proteins. J Chromatogr A 2022; 1682:463509. [PMID: 36155074 DOI: 10.1016/j.chroma.2022.463509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 08/14/2022] [Accepted: 09/15/2022] [Indexed: 11/23/2022]
Abstract
Selective separation and purification of protein from complex medium is required to completely investigate the structure and function of the target protein. In this study, a composite macroporous agarose monolith containing iminodiacetate-chelated Ni2+ ligands was synthesized for selective separation and purification of histidine-tagged recombinant proteins. The large and interconnected pores in the monolith enabled fast binding of proteins with high matrix tolerance in treating complex mediums. To realize the selective protein binding, the iminodiacetate was directly conjugated to epoxy-functionalized agarose monolith via simple chemical reactions between epoxy and imino groups. After chelated Ni2+, the composite monolith could bind histidine-tagged recombinant proteins through the coordination interaction between transition metal ions and the imidazole ring of histidine. To further increase the binding capacities of the monolith, a hydrophilic intermediate polymer chain containing multiple iminodiacetate immobilization sites was conjugated to the azide-functionalized agarose monolith via Cu(I)-catalyzed azide-alkyne cycloaddition (CuAAC) reaction. The morphology and chemical composition of the composite agarose monolith were characterized systematically. The protein binding capacities of the obtained composite agarose monolith were subsequently investigated. The binding capacities of the composite agarose monolith towards the model proteins Gp10 and Lys84 were 0.93 and 0.51 mg/mL, respectively. The protein binding of the composite agarose monolith could be manipulated by adjusting the temperature and concentrations of imidazole. These results demonstrate that the composite agarose monolith could be used as an affinity medium for rapid separation and purification of histidine-tagged recombinant proteins from biological samples.
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Nagase K, Ishizawa Y, Inoue M, Kokubun M, Yamada S, Kanazawa H. Temperature-responsive spin column for sample preparation using an all-aqueous eluent. Anal Chim Acta 2021; 1179:338806. [PMID: 34535268 DOI: 10.1016/j.aca.2021.338806] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 05/31/2021] [Accepted: 06/24/2021] [Indexed: 11/21/2022]
Abstract
We present a temperature-responsive spin column using an all-aqueous eluent. The method is intended as a simple sample preparation method for protein removal from serum, which is required for serum drug analysis. As packing materials for the spin column, we prepared two types of silica beads via surface-initiated radical polymerization. The large beads (diameter, 40-63 μm) were grafted with a temperature-responsive cationic copolymer, poly(N-isopropylacrylamide-co-N,N-dimethylaminopropyl acrylamide-co-n-butyl methacrylate) (P(NIPAAm-co-DMAPAAm-co-BMA)), and the small beads (diameter, 5 μm) were grafted with a temperature-responsive hydrophobic copolymer, P(NIPAAm-co-BMA). The beads were packed into the spin column as a double layer: P(NIPAAm-co-BMA) silica beads on the bottom and P(NIPAAm-co-DMAPAAm-co-BMA) silica beads on the top. The sample purification efficacy of the prepared spin column was evaluated on a model sample analyte (the antifungal drug voriconazole mixed with blood serum proteins). At 40 °C, the serum proteins and voriconazole were adsorbed on the prepared spin column via hydrophobic and electrostatic interactions. When the temperature was decreased to 4 °C, the adsorbed voriconazole was eluted from the column with the pure water eluent, while the serum proteins remained in the column. This temperature-responsive spin column realizes sample preparation simply by changing the temperature.
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Affiliation(s)
- Kenichi Nagase
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato, Tokyo, 105-8512, Japan.
| | - Yuta Ishizawa
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato, Tokyo, 105-8512, Japan
| | - Masakazu Inoue
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato, Tokyo, 105-8512, Japan
| | - Matsurika Kokubun
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato, Tokyo, 105-8512, Japan
| | - Sota Yamada
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato, Tokyo, 105-8512, Japan
| | - Hideko Kanazawa
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato, Tokyo, 105-8512, Japan
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Nagase K. Thermoresponsive interfaces obtained using poly(N-isopropylacrylamide)-based copolymer for bioseparation and tissue engineering applications. Adv Colloid Interface Sci 2021; 295:102487. [PMID: 34314989 DOI: 10.1016/j.cis.2021.102487] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 07/09/2021] [Accepted: 07/10/2021] [Indexed: 12/11/2022]
Abstract
Poly(N-isopropylacrylamide) (PNIPAAm) is the most well-known and widely used stimuli-responsive polymer in the biomedical field owing to its ability to undergo temperature-dependent hydration and dehydration with temperature variations, causing hydrophilic and hydrophobic alterations. This temperature-dependent property of PNIPAAm provides functionality to interfaces containing PNIPAAm. Notably, the hydrophilic and hydrophobic alterations caused by the change in the temperature-responsive property of PNIPAAm-modified interfaces induce temperature-modulated interactions with biomolecules, proteins, and cells. This intrinsic property of PNIPAAm can be effectively used in various biomedical applications, particularly in bioseparation and tissue engineering applications, owing to the functionality of PNIPAAm-modified interfaces based on the temperature modulation of the interaction between PNIPAAm-modified interfaces and biomolecules and cells. This review focuses on PNIPAAm-modified interfaces in terms of preparation method, properties, and their applications. Advances in PNIPAAm-modified interfaces for existing and developing applications are also summarized.
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Affiliation(s)
- Kenichi Nagase
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato, Tokyo 105-8512, Japan.
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Hwang ET, Joo YE, Kim KR, Jeong J. Biomineralized separation, concentration, and evaluation of the effectiveness of Schisandra chinensis fruit extract. Food Chem 2021; 360:130063. [PMID: 34029927 DOI: 10.1016/j.foodchem.2021.130063] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 05/05/2021] [Accepted: 05/09/2021] [Indexed: 01/08/2023]
Abstract
Here, we detail the biomineralization-assisted separation and concentration of crude food extract and an evaluation of its effectiveness. Schisandra chinensis fruit extract was used as a model plant extract. Hybrid grape-like mineral was assembled by calcium carbonate mineralization. The hybrid particles of S. chinensis mineral were fully characterized using field emission scanning electron microscopy, X-ray diffraction, thermogravimetric analysis, and particle size analysis. Data including the Brunauer-Emmett-Teller surface area, single point total pore volume, and adsorption/desorption analysis of pore size were also investigated. Organic molecules, including lipids such as palmitic acid, stearic acid, and linolenic acid in the Schisandra chinensis fruit, affect the formation of complex structures involving the CaCO3 mineralization pathway by inhibiting crystallization. However, the cosmetic active primary components were entrapped in a similar proportion in the preserved extract, and were efficiently separated without additional filtering and concentration steps for purification. In addition, the hybrid mineral was enriched (10.5 times) in Gomisin N, a representative component of S. chinensis fruit, relative to its concentration in the initial extract samples. The hybrid mineral inhibited both intracellular and extracellular melanin production and increased the 2,2-diphenyl-1-picrylhydrazyl radical scavenging activity. The data provide the first evidence of the potential use of fruit extract for obtaining hybrid minerals and the effectiveness of the biomineralization-based separation and concentration strategy.
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Affiliation(s)
- Ee Taek Hwang
- Department of Food Biotechnology, Dong-A University, Busan 49315, Republic of Korea.
| | - Ye Eun Joo
- GeneCellPharm Corporation, Seoul 05836, Republic of Korea
| | - Ka Ram Kim
- GeneCellPharm Corporation, Seoul 05836, Republic of Korea
| | - Jinhee Jeong
- Symbiose Cosmetics, Seongnam-si, Gyeonggi-do 13555, Republic of Korea
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Abarca-Cabrera L, Fraga-García P, Berensmeier S. Bio-nano interactions: binding proteins, polysaccharides, lipids and nucleic acids onto magnetic nanoparticles. Biomater Res 2021; 25:12. [PMID: 33883044 PMCID: PMC8059211 DOI: 10.1186/s40824-021-00212-y] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Accepted: 03/21/2021] [Indexed: 12/11/2022] Open
Abstract
The major interest in nanoparticles as an application platform for biotechnology arises from their high surface-to-volume ratio. Iron oxide nanoparticles (IONPs) are particularly appealing due to their superparamagnetic behavior, which enables bioseparation using external magnetic fields. In order to design advanced biomaterials, improve binding capacities and develop innovative processing solutions, a thorough understanding of the factors governing organic-inorganic binding in solution is critical but has not yet been achieved, given the wide variety of chemical and physical influences. This paper offers a critical review of experimental studies of the interactions between low cost IONPs (bare iron oxides, silica-coated or easily-functionalized surfaces) and the main groups of biomolecules: proteins, lipids, nucleic acids and carbohydrates. Special attention is devoted to the driving forces and interdependencies responsible of interactions at the solid-liquid interface, to the unique structural characteristics of each biomolecular class, and to environmental conditions influencing adsorption. Furthermore, studies focusing on mixtures, which are still rare, but absolutely necessary to understand the biocorona, are also included. This review concludes with a discussion of future work needed to fill the gaps in knowledge of bio-nano interactions, seeking to improve nanoparticles' targeting capabilities in complex systems, and to open the door for multipurpose recognition and bioseparation processes.
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Affiliation(s)
- Lucía Abarca-Cabrera
- Bioseparation Engineering Group, Department of Mechanical Engineering, Technical University of Munich, 85748, Garching bei München, Germany
| | - Paula Fraga-García
- Bioseparation Engineering Group, Department of Mechanical Engineering, Technical University of Munich, 85748, Garching bei München, Germany.
| | - Sonja Berensmeier
- Bioseparation Engineering Group, Department of Mechanical Engineering, Technical University of Munich, 85748, Garching bei München, Germany
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Moharkar S, Dhamole PB. Sugaring-out extraction of erythromycin from fermentation broth. KOREAN J CHEM ENG 2021; 38:90-97. [PMID: 33432252 PMCID: PMC7787404 DOI: 10.1007/s11814-020-0680-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 09/14/2020] [Accepted: 09/18/2020] [Indexed: 12/27/2022]
Abstract
This study reports the sugaring-out extraction of erythromycin from fermentation broth using acetonitrile (ACN) as solvent and glucose as a mass separating agent. Different process parameters-glucose concentration, temperature, ACN/water ratio and pH-were optimized to achieve maximum extraction of erythromycin. 88% (w/w) of erythromycin was extracted from the model system with following optimized conditions: glucose 156.3 g/L; temperature 4 °C; ACN/water ratio 1 and pH 8.3. Further, the effect of typical fermentation media components (starch, soybean flour, CaCO3, NaCl and (NH4)2SO4) on sugaring out extraction of erythromycin was also investigated. Starch, soybean flour and CaCO3 were observed to affect erythromycin extraction only at higher concentration. Removal of suspended solids from simulated as well as real broth prior to extraction enhanced the extraction efficiency (from 72% to 87%). Sugaring out extraction of erythromycin was found to be more effective than salting out extraction. Also, higher partition coefficient was achieved in the present work than other reported methods using carbohydrates as mass separating agent. Further, it was found that the antimicrobial activity of erythromycin was preserved during sugaring out extraction of erythromycin.
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Affiliation(s)
- Sharayu Moharkar
- Department of Chemical Engineering, Visvesvaraya National Institute of Technology, Nagpur, Maharashtra, India
| | - Pradip Babanrao Dhamole
- Department of Chemical Engineering, Visvesvaraya National Institute of Technology, Nagpur, Maharashtra, India
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Neves MC, Pereira P, Pedro AQ, Martins JC, Trindade T, Queiroz JA, Freire MG, Sousa F. Improved ionic-liquid-functionalized macroporous supports able to purify nucleic acids in one step. Mater Today Bio 2020; 8:100086. [PMID: 33319188 PMCID: PMC7723793 DOI: 10.1016/j.mtbio.2020.100086] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 10/28/2020] [Accepted: 11/02/2020] [Indexed: 11/16/2022] Open
Abstract
Nucleic acids are relevant biopolymers in therapy and diagnosis, for which their purity and biological activity are of crucial relevance. However, these features are difficult to achieve by cost-effective methods. Herein, we report the functionalization of a macroporous chromatographic support functionalized with an ionic liquid (IL) with remarkable performance to purify nucleic acids. An initial screening with distinct IL chemical structures supported in silica was carried out, allowing to identify the IL 1-methyl-3-propylimidazolium chloride as the most promising ligand. A chromatographic macroporous matrix able to be used in preparative liquid chromatography was then functionalized and binding/elution studies were performed. The IL 1-methyl-3-propylimidazolium chloride acts as a multimodal ligand with a remarkable dynamic binding capacity. This macroporous support allows the (one-step) purification of nucleic acids, namely small RNAs, ribosomal RNA, and genomic DNA, from a bacterial lysate, and can be regenerated and reused without compromising its separation performance.
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Affiliation(s)
- M C Neves
- CICECO - Aveiro Institute of Materials, Chemistry Department, University of Aveiro, Campus Universitário de Santiago, 3810-193, Aveiro, Portugal
| | - P Pereira
- CICS-UBI - Health Sciences Research Centre, Universidade da Beira Interior, Av. Infante D. Henrique, 6200-506 Covilhã, Portugal
| | - A Q Pedro
- CICECO - Aveiro Institute of Materials, Chemistry Department, University of Aveiro, Campus Universitário de Santiago, 3810-193, Aveiro, Portugal
| | - J C Martins
- CICS-UBI - Health Sciences Research Centre, Universidade da Beira Interior, Av. Infante D. Henrique, 6200-506 Covilhã, Portugal
| | - T Trindade
- CICECO - Aveiro Institute of Materials, Chemistry Department, University of Aveiro, Campus Universitário de Santiago, 3810-193, Aveiro, Portugal
| | - J A Queiroz
- CICS-UBI - Health Sciences Research Centre, Universidade da Beira Interior, Av. Infante D. Henrique, 6200-506 Covilhã, Portugal
| | - M G Freire
- CICECO - Aveiro Institute of Materials, Chemistry Department, University of Aveiro, Campus Universitário de Santiago, 3810-193, Aveiro, Portugal
| | - F Sousa
- CICS-UBI - Health Sciences Research Centre, Universidade da Beira Interior, Av. Infante D. Henrique, 6200-506 Covilhã, Portugal
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Zheng H, Gong H, Cao L, Lin H, Ye L. Photoconjugation of temperature- and pH-responsive polymer with silica nanoparticles for separation and enrichment of bacteria. Colloids Surf B Biointerfaces 2020; 197:111433. [PMID: 33171436 DOI: 10.1016/j.colsurfb.2020.111433] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 08/27/2020] [Accepted: 10/17/2020] [Indexed: 02/08/2023]
Abstract
A new photoconjugation approach was developed to prepare nanoparticle-supported boronic acid polymer for effective separation and enrichment of bacteria. The photo-activated polymer immobilization was demonstrated by coupling an azide-modified copolymer of N-isopropylacrylamide and glycidyl methacrylate to a perfluorophenyl azide-modified silica surface. The thermoresponsive polymer was synthesized using reversible addition fragmentation chain transfer polymerization followed by conversion of the pendant epoxides into azide groups. The perfluorophenyl azide-modified silica nanoparticles were synthesized by an amidation reaction between amino-functionalized silica and pentafluorobenzoyl chloride, and a subsequent treatment with sodium azide. Bacteria-capturing boronic acid was conjugated to the silica-supported polymer chains via Cu(I)-catalyzed azide-alkyne cycloaddition (CuAAC) click reaction. The particle size, morphology and organic content of the composite nanoparticles were characterized systematically. The capability of the nanocomposite to bind Gram-positive and Gram-negative bacteria was investigated. The nanocomposite exhibited high binding capacities for E. coli (13.4 × 107 CFU/mg) and S. epidermidis (7.66 × 107 CFU/mg) in phosphate buffered saline. The new photoconjugation strategy enables fast and straightforward grafting of functional polymers on surface, which opens many new opportunities for designing functional materials for bioseparation and biosensing.
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Affiliation(s)
- Hongwei Zheng
- Division of Pure and Applied Biochemistry, Department of Chemistry, Lund University, Box 124, 221 00, Lund, Sweden; Food Safety Laboratory, College of Food Science & Engineering, Ocean University of China, Qingdao, 266003, China
| | - Haiyue Gong
- Division of Pure and Applied Biochemistry, Department of Chemistry, Lund University, Box 124, 221 00, Lund, Sweden
| | - Limin Cao
- Food Safety Laboratory, College of Food Science & Engineering, Ocean University of China, Qingdao, 266003, China
| | - Hong Lin
- Food Safety Laboratory, College of Food Science & Engineering, Ocean University of China, Qingdao, 266003, China.
| | - Lei Ye
- Division of Pure and Applied Biochemistry, Department of Chemistry, Lund University, Box 124, 221 00, Lund, Sweden.
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Chen G, Umatheva U, Pagano J, Yu D, Ghose S, Li Z, Ghosh R. High-resolution purification of a therapeutic PEGylated protein using a cuboid packed-bed device. J Chromatogr A 2020; 1630:461524. [PMID: 32920248 DOI: 10.1016/j.chroma.2020.461524] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Revised: 08/15/2020] [Accepted: 09/01/2020] [Indexed: 12/18/2022]
Abstract
PEGylated proteins which are a class of protein-synthetic polymer conjugates that have shown significant promise in the area of biotherapeutics are difficult to purify. A cuboid packed-bed device was used to purify a mono-PEGylated therapeutic protein from impurities such as high molecular weight (HMW) species (e.g., tri- and/or di-PEGylated forms), and low molecular weight (LMW) species such as unreacted protein and polyethylene glycol (or PEG). The separation efficiency of this device was compared with that of an equivalent cylindrical column. The effects of operating conditions such as flow rate, buffer composition, elution gradient, and column loading were systematically compared. An equivalent column with the same bed volume, same resin and same bed height was served as control. In mono-PEGylated protein purifications experiments, the cuboid packed-bed device exhibited sharper peaks and gave better resolution at all conditions examined in this study. The purity of mono-PEGylated protein in the samples collected from the cuboid packed-bed device and the column were comparable, i.e., 98.1% and 97.9% respectively. The recovery of mono-PEGylated protein in the pooled eluate from the cuboid packed-bed device was 31.7% greater than that recovered in the pooled eluate from the column. Therefore, significantly higher recovery of mono-PEGylated protein was obtained with the cuboid packed-bed device while maintaining the same purity specification as obtained with the column.
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Affiliation(s)
- Guoqiang Chen
- Department of Chemical Engineering, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4L7, Canada
| | - Umatheny Umatheva
- Department of Chemical Engineering, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4L7, Canada
| | - John Pagano
- Biologics Process Development, Bristol-Myers Squibb, 3510F-BDB231, 38 Jackson Road, Devens MA 01434, United States
| | - Deqiang Yu
- Biologics Process Development, Bristol-Myers Squibb, 3510F-BDB231, 38 Jackson Road, Devens MA 01434, United States
| | - Sanchayita Ghose
- Biologics Process Development, Bristol-Myers Squibb, 3510F-BDB231, 38 Jackson Road, Devens MA 01434, United States
| | - Zhengjian Li
- Biologics Process Development, Bristol-Myers Squibb, 3510F-BDB231, 38 Jackson Road, Devens MA 01434, United States
| | - Raja Ghosh
- Department of Chemical Engineering, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4L7, Canada.
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14
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Haghighi AH, Khorasani MT, Faghih Z, Farjadian F. Effects of different quantities of antibody conjugated with magnetic nanoparticles on cell separation efficiency. Heliyon 2020; 6:e03677. [PMID: 32280795 PMCID: PMC7136644 DOI: 10.1016/j.heliyon.2020.e03677] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2019] [Revised: 10/21/2019] [Accepted: 03/24/2020] [Indexed: 11/30/2022] Open
Abstract
Antibody-conjugated magnetic nanoparticles (Ab-MNPs) have received considerable attention in bioseparation and clinical diagnostics assays due to their unique ability to detect and isolate a variety of biomolecules and cells. Because antibodies can be expensive, a key challenge for bioconjugation is to determine the optimal amount of antibodies with reasonable antigen-capturing activity. We designed an approach to determine the minimum amounts of antibodies for efficient coating. Different quantities of Herceptin (anti-human epidermal growth factor receptor 2: HER2) antibody were applied and immobilized on the surface of MNPs. Antibody binding was then checked by using an anti-human antibody conjugated with fluorochrome and flow cytometry. When the ratio of MNPs to antibodies increased from 0.79 to 795.45, mean fluorescence intensity (MFI) of conjugated MNPs decreased markedly from 185.56 to 20.07, indicating lower surface antibody coverage. We then investigated the relation between antibody content and isolation efficiency. Three Ab-MNP samples with different MFI were used to isolate SK-BR-3, a HER2-positive breast cancer cell line, from mixtures of whole blood or mononuclear cells. After isolation in a magnetic field, separation efficiency was evaluated by fluorescence microscopy and flow cytometry-based techniques. Our results collectively showed that the amount of anti-HER2 antibodies for conjugation with MNPs could be decreased by as much as one-fifteenth without compromising isolation efficiency, which in turn can reduce the cost of immunoassay biosensors.
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Affiliation(s)
- Amir Hossein Haghighi
- Department of Biomedical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | | | - Zahra Faghih
- Shiraz Institute for Cancer Research, Medical School, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Fatemeh Farjadian
- Pharmaceutical Sciences Research Center, Faculty of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran
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15
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Matos MJB, Pina AS, Roque ACA. Rational design of affinity ligands for bioseparation. J Chromatogr A 2020; 1619:460871. [PMID: 32044126 DOI: 10.1016/j.chroma.2020.460871] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Revised: 01/05/2020] [Accepted: 01/08/2020] [Indexed: 11/25/2022]
Abstract
Affinity adsorbents have been the cornerstone in protein purification. The selective nature of the molecular recognition interactions established between an affinity ligands and its target provide the basis for efficient capture and isolation of proteins. The plethora of affinity adsorbents available in the market reflects the importance of affinity chromatography in the bioseparation industry. Ligand discovery relies on the implementation of rational design techniques, which provides the foundation for the engineering of novel affinity ligands. The main goal for the design of affinity ligands is to discover or improve functionality, such as increased stability or selectivity. However, the methodologies must adapt to the current needs, namely to the number and diversity of biologicals being developed, and the availability of new tools for big data analysis and artificial intelligence. In this review, we offer an overview on the development of affinity ligands for bioseparation, including the evolution of rational design techniques, dating back to the years of early discovery up to the current and future trends in the field.
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Affiliation(s)
- Manuel J B Matos
- UCIBIO, Chemistry Department, School of Sciences and Technology, NOVA University of Lisbon, 2829-516 Caparica, Portugal
| | - Ana S Pina
- UCIBIO, Chemistry Department, School of Sciences and Technology, NOVA University of Lisbon, 2829-516 Caparica, Portugal
| | - A C A Roque
- UCIBIO, Chemistry Department, School of Sciences and Technology, NOVA University of Lisbon, 2829-516 Caparica, Portugal.
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16
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Ketterer B, Moore-Kelly C, Thomas ORT, Franzreb M. Integrated system for temperature-controlled fast protein liquid chromatography. III. Continuous downstream processing of monoclonal antibodies. J Chromatogr A 2020; 1609:460429. [PMID: 31431354 DOI: 10.1016/j.chroma.2019.460429] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 07/21/2019] [Accepted: 08/04/2019] [Indexed: 11/25/2022]
Abstract
Three different applications of travelling heating zone reactor (THZR) chromatography for the downstream processing of monoclonal antibodies (mAbs) are described. mAb containing feedstocks were applied to a fixed bed of the thermoresponsive rProtein A matrix, Byzen Pro™, contained in a bespoke column (held at 15 °C) fitted with a travelling heating (42 °C) device encircling a narrow section of the column. For the demonstration of continuous concentration, uninterrupted loading of 1.0 g/L mAb in a pH 8 binding buffer was synchronized with 5 repeated movements of the heating zone along the column's full length at a velocity of 0.1 mm/s. Elution of mAbs was induced solely by the travelling heating zone's action, each full movement generating a sharp concentrated elution peak accompanied by a small transient mAb concentration-dependent dip in conductivity. Quasi-steady-state operation occurred from the third elution onwards, delivering a mean mAb concentration of 4.9 g/L and process yield >93%. Quasi-continuous separation of the target mAb (1.41 g/L) from bovine serum albumin, BSA (1.0 g/L), was achieved by cyclically alternating the feeding of the mAb + BSA feedstock, with that of the binding buffer alone; supply of the latter was timed to coincide with movement of the heating zone. Accurate coordination of the heating zone's travel and switching from feed to buffer permitted quasi-steady-state collection (elutions 3-6) of sharp peaks of mAb in high purity (98.7%) and yield (88.7%) in 4.5-fold concentrated form, with BSA exiting in the flow through fractions between successive mAb elution peaks. Fully automated THZR-mediated quasi-continuous buffer exchange of 1.34 g/L mAb from a phosphate buffer pH 8 into a HEPES buffer pH 8 of slightly lower conductivity was performed over a 19 h period by carefully timed switching from one feed solution to the other and back again, whilst synchronising movement of the heating zone with feeding of the exchange buffer. Quasi-steady-state operation (elutions 2-9) resulted in an average eluted mAb yield of 94.5% and concentration of 4.8 g/L. Triggering movement of the heating zone slightly ahead of the switch from mAb feed to exchange buffer permitted the positioning of mAb elution peaks in 9 mL volume segments with the lowest recorded conductivity. Measurements of buffer exchange performance conducted with two 'protein-free' systems demonstrated that compared to tangential flow filtration in diafiltration mode, which represents the 'state-of-the-art' technology for buffer exchange, the THZR chromatography based approach affords a >60% saving in minimum volume of exchange buffer required to remove 99.9% of the original buffer. Combined far and near UV circular dichroism, intrinsic fluorescence and thermal melting experiments showed that, unlike conventional Protein A/G affinity chromatography, the conditions for THZR Protein A chromatography respect maintenance of a favourable structural profile for mAbs.
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Affiliation(s)
- Benedikt Ketterer
- Institute for Functional Interfaces, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Charles Moore-Kelly
- School of Chemical Engineering, College of Engineering and Physical Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, England, UK
| | - Owen R T Thomas
- School of Chemical Engineering, College of Engineering and Physical Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, England, UK.
| | - Matthias Franzreb
- Institute for Functional Interfaces, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany.
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17
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Nagase K, Kitazawa S, Yamada S, Akimoto AM, Kanazawa H. Mixed polymer brush as a functional ligand of silica beads for temperature-modulated hydrophobic and electrostatic interactions. Anal Chim Acta 2020; 1095:1-13. [PMID: 31864610 DOI: 10.1016/j.aca.2019.10.058] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2019] [Revised: 10/21/2019] [Accepted: 10/24/2019] [Indexed: 11/23/2022]
Abstract
We developed a mixed polymer brush, which consists of temperature-responsive polymer and cationic polymer modified beads as functional chromatographic matrices, for temperature-modulated multiple hydrophobic and electrostatic interactions. The mixed polymer brush was modified on silica beads through the combination of reversible addition-fragmentation chain transfer (RAFT) polymerization of N,N-dimethylaminopropyl acrylamide (DMAPAAm) and surface initiated atom transfer radical polymerization (ATRP) of N-isopropylacrylamide (NIPAAm). Zeta potential measurement of the mixed polymer brush revealed that the zeta potential increased with increasing temperature, which was attributed to the exposed PDMAPAAm on the beads arising from the shrinking of PNIPAAm upon increasing the temperature. The prepared beads were used as the packing material of high performance liquid chromatography (HPLC) columns, and the elution behavior of steroids, adenosine nucleotides, and proteins through the column was observed. The retention time of steroids increased with increasing the column temperature because of the dehydration of PNIPAAm in the mixed polymer brush. Adenosine nucleotides were also retained by the columns, which was attributed to the electrostatic interaction with PDMAPAAm in the mixed polymer brush. Several proteins were adsorbed on the column at elevated temperatures because of the enhanced electrostatic interaction of exposed PDMAPAAm and the enhanced hydrophobic interaction resulting from the dehydration of PNIPAAm. By exploiting this unique property, mixtures of proteins could be separated by simply changing the column temperature. These results indicate that the developed mixed polymer brush modified beads would be useful as functional chromatographic packing matrices for thermally-modulated multiple hydrophobic and electrostatic interactions.
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18
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Jiang L, Ye L. Nanoparticle-supported temperature responsive polymer brushes for affinity separation of histidine-tagged recombinant proteins. Acta Biomater 2019; 94:447-458. [PMID: 31055124 DOI: 10.1016/j.actbio.2019.04.056] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2019] [Revised: 04/25/2019] [Accepted: 04/25/2019] [Indexed: 01/14/2023]
Abstract
We developed a modular approach for the preparation of nanoparticle-supported polymer brushes carrying repeating iminodiacetate units for affinity separation of histidine-tagged recombinant proteins. The nanoparticle-supported polymer brushes were prepared via the combination of surface-initiated atom transfer radical polymerization with Cu(I)-catalyzed azide-alkyne cycloaddition reaction. The nanocomposite materials were characterized to determine the particle size, morphology, organic content, densities of polymer chains and the affinity ligand. Protein binding assay illustrated that the iminodiacetate-rich polymer brushes enable to selectively bind histidine-tagged recombinant proteins in the presence of abundant interfering proteins. More importantly, the protein binding capacity can be tuned by adjusting the environmental temperature. STATEMENT OF SIGNIFICANCE: The nanoparticle core-polymer brush structure enables selective binding of histidine-tagged recombinant proteins via multiple metal-coordination interactions. The soft and flexible structure of the polymer brushes was found beneficial for lowering the steric hindrance in protein binding. Taking advantage of the conformational changes of the polymer brushes at different temperatures, it is possible to modulate the protein binding on the nanocomposite by adjusting the environmental temperature. In general, the iminodiacetate-rich core-brush nano adsorbents are attractive for purifying histidine-tagged recombinant proteins practically. The synthetic approach reported here may be expanded to develop other advanced functional materials for applications in various biomedical fields ranging from biosensors to drug delivery.
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Affiliation(s)
- Lingdong Jiang
- Division of Pure and Applied Biochemistry, Department of Chemistry, Lund University, Box 124, 221 00 Lund, Sweden
| | - Lei Ye
- Division of Pure and Applied Biochemistry, Department of Chemistry, Lund University, Box 124, 221 00 Lund, Sweden.
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19
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Nagase K, Yamato M, Kanazawa H, Okano T. Poly(N-isopropylacrylamide)-based thermoresponsive surfaces provide new types of biomedical applications. Biomaterials 2017; 153:27-48. [PMID: 29096399 DOI: 10.1016/j.biomaterials.2017.10.026] [Citation(s) in RCA: 228] [Impact Index Per Article: 32.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Revised: 10/12/2017] [Accepted: 10/15/2017] [Indexed: 02/06/2023]
Abstract
Thermoresponsive surfaces, prepared by grafting of poly(N-isopropylacrylamide) (PIPAAm) or its copolymers, have been investigated for biomedical applications. Thermoresponsive cell culture dishes that show controlled cell adhesion and detachment following external temperature changes, represent a promising application of thermoresponsive surfaces. These dishes can be used to fabricate cell sheets, which are currently used as effective therapies for patients. Thermoresponsive microcarriers for large-scale cell cultivation have also been developed by taking advantage of the thermally modulated cell adhesion and detachment properties of thermoresponsive surfaces. Furthermore, thermoresponsive bioseparation systems using thermoresponsive surfaces for separating and purifying pharmaceutical proteins and therapeutic cells have been developed, with the separation systems able to maintain their activity and biological potency throughout the procedure. These applications of thermoresponsive surfaces have been improved with progress in preparation techniques of thermoresponsive surfaces, such as polymerization methods, and surface modification techniques. In the present review, the various types of PIPAAm-based thermoresponsive surfaces are summarized by describing their preparation methods, properties, and successful biomedical applications.
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Affiliation(s)
- Kenichi Nagase
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato, Tokyo 105-8512, Japan; Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University, TWIns, 8-1 Kawadacho, Shinjuku, Tokyo 162-8666, Japan.
| | - Masayuki Yamato
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University, TWIns, 8-1 Kawadacho, Shinjuku, Tokyo 162-8666, Japan
| | - Hideko Kanazawa
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato, Tokyo 105-8512, Japan
| | - Teruo Okano
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University, TWIns, 8-1 Kawadacho, Shinjuku, Tokyo 162-8666, Japan; Cell Sheet Tissue Engineering Center (CSTEC) and Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, 30 South 2000 East, Salt Lake City, Utah 84112, USA.
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20
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Lin L, Sun H, Zhang K, Zhong Y, Cheng Q, Bian X, Xin Q, Cheng B, Feng X, Zhang Y. Novel affinity membranes with macrocyclic spacer arms synthesized via click chemistry for lysozyme binding. J Hazard Mater 2017; 327:97-107. [PMID: 28043047 DOI: 10.1016/j.jhazmat.2016.12.047] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Revised: 12/22/2016] [Accepted: 12/23/2016] [Indexed: 06/06/2023]
Abstract
Affinity membrane has great potential for applications in bioseparation and purification. Disclosed herein is the design of a novel affinity membrane with macrocyclic spacer arms for lysozyme binding. The clickable azide-cyclodextrin (CD) arms and clickable alkyne ethylene-vinyl alcohol (EVAL) chains are designed and prepared. By the azide-alkyne click reaction, the EVAL-CD-ligands affinity membranes with CD spacer arms in three-dimensional micro channels have been successfully fabricated. The FT-IR, XPS, NMR, SEM and SEM-EDS results give detailed information of structure evolution. The abundant pores in membrane matrix provide efficient working channels, and the introduced CD arms with ligands (affinity sites) provide supramolecular atmosphere. Compared with that of raw EVAL membrane, the adsorption capacity of EVAL-CD-ligands membrane (26.24mg/g) show a triple increase. The study indicates that three effects (inducing effect, arm effect, site effect) from CD arms render the enhanced performance. The click reaction happened in membrane matrix in bulk. The effective lysozyme binding and higher adsorption performance of affinity membranes described herein compared with other reported membranes are markedly related with the proposed strategy involving macrocyclic spacer arms and supramolecular working channels.
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Affiliation(s)
- Ligang Lin
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, PR China.
| | - Hui Sun
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, PR China
| | - Kaiyu Zhang
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, PR China
| | - Yonghui Zhong
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, PR China
| | - Qi Cheng
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, PR China
| | - Xihui Bian
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, PR China
| | - Qingping Xin
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, PR China; Department of Chemical Engineering, University of Waterloo, Waterloo, ONT., N2L 3G1, Canada
| | - Bowen Cheng
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, PR China; Department of Chemical Engineering, University of Waterloo, Waterloo, ONT., N2L 3G1, Canada
| | - Xianshe Feng
- Department of Chemical Engineering, University of Waterloo, Waterloo, ONT., N2L 3G1, Canada
| | - Yuzhong Zhang
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, PR China
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21
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Leong YK, Lan JCW, Loh HS, Ling TC, Ooi CW, Show PL. Cloud-point extraction of green-polymers from Cupriavidus necator lysate using thermoseparating-based aqueous two-phase extraction. J Biosci Bioeng 2016; 123:370-375. [PMID: 27745851 DOI: 10.1016/j.jbiosc.2016.09.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Revised: 08/29/2016] [Accepted: 09/12/2016] [Indexed: 11/17/2022]
Abstract
Polyhydroxyalkanoates (PHAs), a class of renewable and biodegradable green polymers, have gained attraction as a potential substitute for the conventional plastics due to the increasing concern towards environmental pollution as well as the rapidly depleting petroleum reserve. Nevertheless, the high cost of downstream processing of PHA has been a bottleneck for the wide adoption of PHAs. Among the options of PHAs recovery techniques, aqueous two-phase extraction (ATPE) outshines the others by having the advantages of providing a mild environment for bioseparation, being green and non-toxic, the capability to handle a large operating volume and easily scaled-up. Utilizing unique properties of thermo-responsive polymer which has decreasing solubility in its aqueous solution as the temperature rises, cloud point extraction (CPE) is an ATPE technique that allows its phase-forming component to be recycled and reused. A thorough literature review has shown that this is the first time isolation and recovery of PHAs from Cupriavidus necator H16 via CPE was reported. The optimum condition for PHAs extraction (recovery yield of 94.8% and purification factor of 1.42 fold) was achieved under the conditions of 20 wt/wt % ethylene oxide-propylene oxide (EOPO) with molecular weight of 3900 g/mol and 10 mM of sodium chloride addition at thermoseparating temperature of 60°C with crude feedstock limit of 37.5 wt/wt %. Recycling and reutilization of EOPO 3900 can be done at least twice with satisfying yield and PF. CPE has been demonstrated as an effective technique for the extraction of PHAs from microbial crude culture.
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Affiliation(s)
- Yoong Kit Leong
- Department of Chemical and Environmental Engineering, Faculty of Engineering, University of Nottingham Malaysia Campus, Jalan Broga, 43500 Semenyih, Selangor Darul Ehsan, Malaysia
| | - John Chi-Wei Lan
- Biorefinery and Bioprocess Engineering Laboratory, Department of Chemical Engineering and Material Science, Yuan Ze University, No. 135 Yuan-Tung Road, Chungli, Taoyuan 320, Taiwan
| | - Hwei-San Loh
- School of Biosciences, Faculty of Science, University of Nottingham Malaysia Campus, Jalan Broga, 43500 Semenyih, Selangor Darul Ehsan, Malaysia; Biotechnology Research Centre, University of Nottingham Malaysia Campus, Jalan Broga, 43500 Semenyih, Selangor, Malaysia
| | - Tau Chuan Ling
- Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Chien Wei Ooi
- Chemical Engineering, School of Engineering, Monash University, 46150 Bandar Sunway, Selangor Darul Ehsan, Malaysia
| | - Pau Loke Show
- Department of Chemical and Environmental Engineering, Faculty of Engineering, University of Nottingham Malaysia Campus, Jalan Broga, 43500 Semenyih, Selangor Darul Ehsan, Malaysia; Molecular Pharming and Bioproduction Research Group, Faculty of Engineering, University of Nottingham Malaysia Campus, Jalan Broga, 43500 Semenyih, Selangor Darul Ehsan, Malaysia.
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22
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Abstract
The aim of this study was to investigate color, suspended solids (SS), chemical oxygen demand (COD) and biological oxygen demand (BOD) removal using modified sericite with magnesium (Mg-Sericite) flocculants in dyeing wastewater. Mg-Sericite flocculants successfully removed >95% of color, SS. COD and BOD in dyeing wastewater at the following optimal conditions: Mg-Sericite dosage of 40 mg/L, pH of 11, Mg/Sericite ratio of 1.5, settling time of 20 min, mixing time of 10 min and mixing rate of 100 rpm. The bioflocculant, Mg-Sericite, can be a promising flocculants due to its high efficiency and low dose requirements in dyeing wastewater treatment. In addition, Mg-Sericite does not contaminate treated wastewater, which can be recycled to reduce not only the cost and the demand for water but also the extra operational costs for reusing wastewater.
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Affiliation(s)
- Hee-Jeong Choi
- a Department of Energy and Environment Convergence , Catholic Kwandong University , Gangneung , Republic of Korea
| | - Kyu Han Kim
- b Department of Civil Engineering , Catholic Kwandong University , Gangneung , Republic of Korea
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23
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Weigum SE, Xiang L, Osta E, Li L, López GP. Hollow silica microspheres for buoyancy-assisted separation of infectious pathogens from stool. J Chromatogr A 2016; 1466:29-36. [PMID: 27614729 DOI: 10.1016/j.chroma.2016.09.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Revised: 08/09/2016] [Accepted: 09/01/2016] [Indexed: 10/21/2022]
Abstract
Separation of cells and microorganisms from complex biological mixtures is a critical first step in many analytical applications ranging from clinical diagnostics to environmental monitoring for food and waterborne contaminants. Yet, existing techniques for cell separation are plagued by high reagent and/or instrumentation costs that limit their use in many remote or resource-poor settings, such as field clinics or developing countries. We developed an innovative approach to isolate infectious pathogens from biological fluids using buoyant hollow silica microspheres that function as "molecular buoys" for affinity-based target capture and separation by floatation. In this process, antibody functionalized glass microspheres are mixed with a complex biological sample, such as stool. When mixing is stopped, the target-bound, low-density microspheres float to the air/liquid surface, which simultaneously isolates and concentrates the target analytes from the sample matrix. The microspheres are highly tunable in terms of size, density, and surface functionality for targeting diverse analytes with separation times of ≤2min in viscous solutions. We have applied the molecular buoy technique for isolation of a protozoan parasite that causes diarrheal illness, Cryptosporidium, directly from stool with separation efficiencies over 90% and low non-specific binding. This low-cost method for phenotypic cell/pathogen separation from complex mixtures is expected to have widespread use in clinical diagnostics as well as basic research.
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Affiliation(s)
- Shannon E Weigum
- Materials Science, Engineering, and Commercialization Program, Texas State University, San Marcos, TX 78666, USA; Department of Biology, Texas State University, San Marcos, TX 78666, USA.
| | - Lichen Xiang
- Materials Science, Engineering, and Commercialization Program, Texas State University, San Marcos, TX 78666, USA
| | - Erica Osta
- Department of Biology, Texas State University, San Marcos, TX 78666, USA
| | - Linying Li
- Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA; NSF Research Triangle Materials Research Science and Engineering Center, Durham, NC 27708, USA
| | - Gabriel P López
- Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA; NSF Research Triangle Materials Research Science and Engineering Center, Durham, NC 27708, USA; Center for Biomedical Engineering, Department of Chemical and Biomedical Engineering, University of New Mexico, Albuquerque, NM 87131, USA
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24
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Popova D, Stonier A, Pain D, Titchener-Hooker NJ, Farid SS. Integrated economic and experimental framework for screening of primary recovery technologies for high cell density CHO cultures. Biotechnol J 2016; 11:899-909. [PMID: 27067803 PMCID: PMC4999028 DOI: 10.1002/biot.201500336] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2015] [Revised: 11/30/2015] [Accepted: 04/06/2016] [Indexed: 12/20/2022]
Abstract
Increases in mammalian cell culture titres and densities have placed significant demands on primary recovery operation performance. This article presents a methodology which aims to screen rapidly and evaluate primary recovery technologies for their scope for technically feasible and cost‐effective operation in the context of high cell density mammalian cell cultures. It was applied to assess the performance of current (centrifugation and depth filtration options) and alternative (tangential flow filtration (TFF)) primary recovery strategies. Cell culture test materials (CCTM) were generated to simulate the most demanding cell culture conditions selected as a screening challenge for the technologies. The performance of these technology options was assessed using lab scale and ultra scale‐down (USD) mimics requiring 25–110mL volumes for centrifugation and depth filtration and TFF screening experiments respectively. A centrifugation and depth filtration combination as well as both of the alternative technologies met the performance selection criteria. A detailed process economics evaluation was carried out at three scales of manufacturing (2,000L, 10,000L, 20,000L), where alternative primary recovery options were shown to potentially provide a more cost‐effective primary recovery process in the future. This assessment process and the study results can aid technology selection to identify the most effective option for a specific scenario.
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Affiliation(s)
- Daria Popova
- Department of Biochemical Engineering, University College London, London, UK
| | | | - David Pain
- Lonza Biologics plc, Slough, Berkshire, UK
| | | | - Suzanne S Farid
- Department of Biochemical Engineering, University College London, London, UK.
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Porfirif MC, Milatich EJ, Farruggia BM, Romanini D. Production of alpha-amylase from Aspergillus oryzae for several industrial applications in a single step. J Chromatogr B Analyt Technol Biomed Life Sci 2016; 1022:87-92. [PMID: 27085017 DOI: 10.1016/j.jchromb.2016.04.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Revised: 04/05/2016] [Accepted: 04/08/2016] [Indexed: 10/22/2022]
Abstract
A one-step method as a strategy of alpha-amylase concentration and purification was developed in this work. This methodology requires the use of a very low concentration of biodegradable polyelectrolyte (Eudragit(®) E-PO) and represents a low cost, fast, easy to scale up and non-polluting technology. Besides, this methodology allows recycling the polymer after precipitation. The formation of reversible soluble/insoluble complexes between alpha-amylase and the polymer Eudragit(®) E-PO was studied, and their precipitation in selected conditions was applied with bioseparation purposes. Turbidimetric assays allowed to determine the pH range where the complexes are insoluble (4.50-7.00); pH 5.50 yielded the highest turbidity of the system. The presence of NaCl (0.05M) in the medium totally dissociates the protein-polymer complexes. When the adequate concentration of polymer was added under these conditions to a liquid culture of Aspergillus oryzae, purification factors of alpha-amylase up to 7.43 and recoveries of 88% were obtained in a simple step without previous clarification. These results demonstrate that this methodology is suitable for the concentration and production of alpha-amylase from this source and could be applied at the beginning of downstream processing.
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Affiliation(s)
- María C Porfirif
- Departamento de Tecnología, Facultad de Ciencias Bioquímicas y Farmacéuticas. Universidad Nacional de Rosario, IPROBYQ-CONICET, Suipacha 531 (S2002RLK), Rosario, Argentina
| | - Esteban J Milatich
- Departamento de Tecnología, Facultad de Ciencias Bioquímicas y Farmacéuticas. Universidad Nacional de Rosario, IPROBYQ-CONICET, Suipacha 531 (S2002RLK), Rosario, Argentina
| | - Beatriz M Farruggia
- Departamento de Tecnología, Facultad de Ciencias Bioquímicas y Farmacéuticas. Universidad Nacional de Rosario, IPROBYQ-CONICET, Suipacha 531 (S2002RLK), Rosario, Argentina
| | - Diana Romanini
- Departamento de Tecnología, Facultad de Ciencias Bioquímicas y Farmacéuticas. Universidad Nacional de Rosario, IPROBYQ-CONICET, Suipacha 531 (S2002RLK), Rosario, Argentina.
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Leong YK, Lan JCW, Loh HS, Ling TC, Ooi CW, Show PL. Thermoseparating aqueous two-phase systems: Recent trends and mechanisms. J Sep Sci 2015; 39:640-7. [PMID: 26447739 DOI: 10.1002/jssc.201500667] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2015] [Revised: 08/09/2015] [Accepted: 08/19/2015] [Indexed: 11/11/2022]
Abstract
Having the benefits of being environmentally friendly, providing a mild environment for bioseparation, and scalability, aqueous two-phase systems (ATPSs) have increasingly caught the attention of industry and researchers for their application in the isolation and recovery of bioproducts. The limitations of conventional ATPSs give rise to the development of temperature-induced ATPSs that have distinctive thermoseparating properties and easy recyclability. This review starts with a brief introduction to thermoseparating ATPSs, including its history, unique characteristics and advantages, and lastly, key factors that influence partitioning. The underlying mechanism of temperature-induced ATPSs is covered together with a summary of recent applications. Thermoseparating ATPSs have been proven as a solution to the demand for economically favorable and environmentally friendly industrial-scale bioextraction and purification techniques.
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Affiliation(s)
- Yoong Kit Leong
- Department of Chemical and Environmental Engineering, Faculty of Engineering, University of Nottingham Malaysia Campus, Jalan Broga, Semenyih, Selangor Darul Ehsan, Malaysia
| | - John Chi-Wei Lan
- Biorefinery and Bioprocess Engineering Laboratory, Department of Chemical Engineering and Material Science, Yuan Ze University, Chungli, Taoyuan, Taiwan
| | - Hwei-San Loh
- School of Biosciences, Faculty of Science, University of Nottingham Malaysia Campus, Jalan Broga, Semenyih, Selangor Darul Ehsan, Malaysia
| | - Tau Chuan Ling
- Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
| | - Chien Wei Ooi
- Chemical Engineering, School of Engineering, Monash University, Bandar Sunway, Selangor, Malaysia
| | - Pau Loke Show
- Department of Chemical and Environmental Engineering, Faculty of Engineering, University of Nottingham Malaysia Campus, Jalan Broga, Semenyih, Selangor Darul Ehsan, Malaysia.,Manufacturing and Industrial Processes Division, Faculty of Engineering, Centre for Food and Bioproduct Processing, University of Nottingham Malaysia Campus, Jalan Broga, Semenyih, Selangor Darul Ehsan, Malaysia
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Popova D, Stonier A, Pain D, Titchener-Hooker NJ, Farid SS. Representative mammalian cell culture test materials for assessment of primary recovery technologies: a rapid method with industrial applicability. Biotechnol J 2015; 10:162-70. [PMID: 25377169 PMCID: PMC4674960 DOI: 10.1002/biot.201400294] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2014] [Revised: 09/22/2014] [Accepted: 11/05/2014] [Indexed: 12/20/2022]
Abstract
Mammalian cell culture material is often difficult to produce accurately and reproducibly for downstream studies. This article presents a methodology for the creation of a set of cell culture test materials where key variables including cell density, cell viability, product, and the host cell protein (HCP) load can be manipulated individually. The methodology was developed using a glutamine synthetase Chinese hamster ovary cell line cultured at 5-L and 70-L scales. Cell concentration post-cell growth was manipulated using tangential flow filtration to generate a range of target cell densities of up to 100 × 106 cells/mL. A method to prepare an apoptotic cell stock to achieve target viabilities of 40–90% is also described. In addition, a range of IgG1 and HCP concentrations was achieved. The results illustrate that the proposed methodology is able to mimic different cell culture profiles by decoupling the control of the key variables. The cell culture test materials were shown to be representative of typical cell culture feed material in terms of particle size distribution and HCP population. This provides a rapid method to create the required feeds for assessing the feasibility of primary recovery technologies designed to cope with higher cell density cultures.
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Affiliation(s)
- Daria Popova
- Department of Biochemical Engineering, University College London, London, UK
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Luís A, Dinis TBV, Passos H, Taha M, Freire MG. Good's buffers as novel phase-forming components of ionic-liquid-based aqueous biphasic systems. Biochem Eng J 2015; 101:142-149. [PMID: 26435687 DOI: 10.1016/j.bej.2015.05.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Aiming at the development of self-buffering and benign extraction/separation processes, this work reports a novel class of aqueous biphasic systems (ABS) composed of ionic liquids (ILs) and organic biological buffers (Good's buffers, GBs). A large array of ILs and GBs was investigated, revealing than only the more hydrophobic and fluorinated ILs are able to form ABS. For these systems, the phase diagrams, tie-lines, tie-line lengths, and critical points were determined at 25 °C. The ABS were then evaluated as alternative liquid-liquid extraction strategies for two amino acids (L-phenylalanine and L-tryptophan). The single-step extraction efficiencies for the GB-rich phase range between 22.4 and 100.0 % (complete extraction). Contrarily to the most conventional IL-salt ABS, in most of the systems investigated, the amino acids preferentially migrate for the most biocompatible and hydrophilic GB-rich phase. Remarkably, in two of the studied ABS, L-phenylalanine completely partitions to the GB-rich phase while L-tryptophan shows a preferential affinity for the opposite phase. These results show that the extraction efficiencies of similar amino acids can be tailored by the design of the chemical structures of the phase-forming components, creating thus new possibilities for the use of IL-based ABS in biotechnological separations.
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Affiliation(s)
- Andreia Luís
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Teresa B V Dinis
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Helena Passos
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Mohamed Taha
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Mara G Freire
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
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Chow YH, Yap YJ, Tan CP, Anuar MS, Tejo BA, Show PL, Ariff AB, Ng EP, Ling TC. Characterization of bovine serum albumin partitioning behaviors in polymer-salt aqueous two-phase systems. J Biosci Bioeng 2014; 120:85-90. [PMID: 25553974 DOI: 10.1016/j.jbiosc.2014.11.021] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2014] [Revised: 11/06/2014] [Accepted: 11/26/2014] [Indexed: 10/24/2022]
Abstract
In this paper, a linear relationship is proposed relating the natural logarithm of partition coefficient, ln K for protein partitioning in poly (ethylene glycol) (PEG)-phosphate aqueous two-phase system (ATPS) to the square of tie-line length (TLL(2)). This relationship provides good fits (r(2) > 0.98) to the partition of bovine serum albumin (BSA) in PEG (1450 g/mol, 2000 g/mol, 3350 g/mol, and 4000 g/mol)-phosphate ATPS with TLL of 25.0-50.0% (w/w) at pH 7.0. Results also showed that the plot of ln K against pH for BSA partitioning in the ATPS containing 33.0% (w/w) PEG1450 and 8.0% (w/w) phosphate with varied working pH between 6.0 and 9.0 exhibited a linear relationship which is in good agreement (r(2) = 0.94) with the proposed relationship, ln K = α' pH + β'. These results suggested that both the relationships proposed could be applied to correlate and elucidate the partition behavior of biomolecules in the polymer-salt ATPS. The influence of other system parameters on the partition behavior of BSA was also investigated. An optimum BSA yield of 90.80% in the top phase and K of 2.40 was achieved in an ATPS constituted with 33.0% (w/w) PEG 1450 and 8.0% (w/w) phosphate in the presence of 8.5% (w/w) sodium chloride (NaCl) at pH 9.0 for 0.3% (w/w) BSA load.
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Affiliation(s)
- Yin Hui Chow
- Department of Process and Food Engineering, Faculty of Engineering, Universiti Putra Malaysia, UPM Serdang 43400, Selangor, Malaysia
| | - Yee Jiun Yap
- Department of Applied Mathematics, Faculty of Engineering, University of Nottingham Malaysia Campus, Jalan Broga, Semenyih 43500, Selangor Darul Ehsan, Malaysia
| | - Chin Ping Tan
- Department of Food Technology, Faculty of Food Science and Technology, Universiti Putra Malaysia, UPM Serdang 43400, Selangor, Malaysia
| | - Mohd Shamsul Anuar
- Department of Process and Food Engineering, Faculty of Engineering, Universiti Putra Malaysia, UPM Serdang 43400, Selangor, Malaysia
| | - Bimo Ario Tejo
- Center for Infectious Diseases Research, Surya University, JI. Scientia Boulevard Block U/7, Gading Serpong, Tangerang 15810, Banten, Indonesia
| | - Pau Loke Show
- Manufacturing and Industrial Processes Division, Faculty of Engineering, Centre for Food and Bioproduct Processing, University of Nottingham Malaysia Campus, Jalan Broga, Semenyih 43500, Selangor Darul Ehsan, Malaysia
| | - Arbakariya Bin Ariff
- Department of Bioprocess Technology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, UPM Serdang 43400, Selangor, Malaysia
| | - Eng-Poh Ng
- School of Chemical Sciences, Universiti Sains Malaysia, Minden 11800, Malaysia
| | - Tau Chuan Ling
- Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia.
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de Souza EC, Coimbra JSDR, de Oliveira EB, Bonomo RCF. Recovery of casein-derived peptides with in vitro inhibitory activity of angiotensin converting enzyme (ACE) using aqueous two-phase systems. J Chromatogr B Analyt Technol Biomed Life Sci 2014; 973C:84-88. [PMID: 25464099 DOI: 10.1016/j.jchromb.2014.10.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2014] [Revised: 10/06/2014] [Accepted: 10/07/2014] [Indexed: 10/24/2022]
Abstract
Peptides inhibiting the activity of angiotensin converting enzyme (ACE) were obtained by trypsin-catalyzed hydrolysis of bovine milk casein, performed at 37°C, during 1, 2, 5, 8 and 24h. Results of in vitro inhibitory activity ranged between 13.4% and 78.5%. The highest ACE inhibitory activity was evidenced for hydrolysates obtained after 2h of reaction. Aqueous two-phase systems (ATPS) formed by polyethylene glycol of 1500gmol-1 (PEG 1500)+sodium phosphate or potassium phosphates were produced and evaluated, in terms of partition coefficients (K) and extraction yields (y), to recovery the casein hydrolysates at room temperature. In ATPS containing sodium phosphate, the peptides showed a slightly greater affinity toward the bottom salt-rich phase (0.1≤K≤0.9; 5.7%≤y≤47%). In the case of ATPS containing potassium phosphates, these molecules showed substantially greater affinity toward the top polymer-rich phase (137≤K≤266; y≥99%). These results point out extraction using PEG 1500/potassium phosphate ATPS is an efficient technique to recover casein hydrolysates containing ACE inhibitors peptides. Outlined data will be helpful in integrating such unit operation to larger scale processes.
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Affiliation(s)
- Evaldo Cardozo de Souza
- Departamento de Tecnologia Rural e Animal, Universidade Estadual do Sudoeste da Bahia, Praça Primavera 40, Bairro Primavera, 45700-000 Itapetinga, BA, Brazil
| | - Jane Sélia Dos Reis Coimbra
- Departamento de Tecnologia de Alimentos, Universidade Federal de Viçosa, Campus Universitário s/n, Centro, 36570-900 Viçosa, MG, Brazil.
| | - Eduardo Basílio de Oliveira
- Departamento de Tecnologia de Alimentos, Universidade Federal de Viçosa, Campus Universitário s/n, Centro, 36570-900 Viçosa, MG, Brazil
| | - Renata Cristina Ferreira Bonomo
- Departamento de Tecnologia Rural e Animal, Universidade Estadual do Sudoeste da Bahia, Praça Primavera 40, Bairro Primavera, 45700-000 Itapetinga, BA, Brazil
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Dashtban M, Gilbert A, Fatehi P. Separation of lignocelluloses from spent liquor of NSSC pulping process via adsorption. J Environ Manage 2014; 136:62-67. [PMID: 24565877 DOI: 10.1016/j.jenvman.2014.01.032] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2013] [Revised: 01/26/2014] [Accepted: 01/28/2014] [Indexed: 06/03/2023]
Abstract
Hemicelluloses and lignin present in the spent liquor (SL) of neutral sulfite semichemical (NSSC) pulping process can potentially be converted into value-added products such as furfural, hydroxymethylfurfural, levulinic acid, phenols and adhesives. However, the direct conversion of hemicelluloses and lignin of SL into value-added products is uneconomical due to the dilute nature of the SL. To have a feasible downstream process for utilizing lignocelluloses of SL, the lignocelluloses should initially be separated from the SL. In this study, an adsorption process (via applying activated carbon) was considered for isolating the dissolved lignin and hemicelluloses from the SL of an NSSC pulping process. Under the optimal conditions of pH, SL/AC weight ratio, time and temperature of 5.7, 30, 360 min and 30 °C, the maximum lignin and hemicellulose adsorptions were 0.33 and 0.25 g/g on AC. The chemical oxygen demand (COD) and turbidity of the SL were decreased by 11% and 39%, respectively, as a result of lignocellulose adsorption on AC. Also, the incineration behavior of the SL-treated AC was studied with a thermo-gravimetric analysis (TGA).
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Affiliation(s)
- Mehdi Dashtban
- Chemical Engineering Department, Lakehead University, 955 Oliver Road, Thunder Bay, Ontario, Canada P7E 5E1
| | - Allan Gilbert
- Chemical Engineering Department, Lakehead University, 955 Oliver Road, Thunder Bay, Ontario, Canada P7E 5E1
| | - Pedram Fatehi
- Chemical Engineering Department, Lakehead University, 955 Oliver Road, Thunder Bay, Ontario, Canada P7E 5E1.
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