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Medeiros Garcia Alcântara J, Iannacci F, Morbidelli M, Sponchioni M. Soft sensor based on Raman spectroscopy for the in-line monitoring of metabolites and polymer quality in the biomanufacturing of polyhydroxyalkanoates. J Biotechnol 2023; 377:23-33. [PMID: 37879569 DOI: 10.1016/j.jbiotec.2023.10.005] [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: 08/05/2023] [Revised: 10/04/2023] [Accepted: 10/16/2023] [Indexed: 10/27/2023]
Abstract
Polyhydroxyalkanoates (PHA) are among the most promising bio-based alternatives to conventional petroleum-based plastics. These biodegradable polyesters can in fact be produced by fermentation from bacteria like Cupriavidus necator, thus reducing the environmental footprint of the manufacturing process. However, ensuring consistent product quality attributes is a major challenge of biomanufacturing. To address this issue, the implementation of real-time monitoring tools is essential to increase process understanding, enable a prompt response to possible process deviations and realize on-line process optimization. In this work, a soft sensor based on in situ Raman spectroscopy was developed and applied to the in-line monitoring of PHA biomanufacturing. This strategy allows the collection of quantitative information directly from the culture broth, without the need for sampling, and at high frequency. In fact, through an optimized multivariate data analysis pipeline, this soft sensor allows monitoring cell dry weight, as well as carbon and nitrogen source concentrations with root mean squared errors (RMSE) equal to 3.71, 7 and 0.03 g/L, respectively. In addition, this tool allows the in-line monitoring of intracellular PHA accumulation, with an RMSE of 14 gPHA/gCells. For the first time, also the number and weight average molecular weights of the polymer produced could be monitored, with RMSE of 8.7E4 and 11.6E4 g/mol, respectively. Overall, this work demonstrates the potential of Raman spectroscopy in the in-line monitoring of biotechnology processes, leading to the simultaneous measurement of several process variables in real time without the need of sampling and labor-intensive sample preparations.
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Affiliation(s)
- João Medeiros Garcia Alcântara
- Dept. of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, via Mancinelli 7, Milano 20131, Italy
| | - Francesco Iannacci
- Dept. of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, via Mancinelli 7, Milano 20131, Italy
| | - Massimo Morbidelli
- Dept. of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, via Mancinelli 7, Milano 20131, Italy
| | - Mattia Sponchioni
- Dept. of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, via Mancinelli 7, Milano 20131, Italy.
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Kim TK, Bham AA, Fioretti I, Angelo J, Xu X, Ghose S, Morbidelli M, Sponchioni M. Role of the gradient slope during the product internal recycling for the multicolumn countercurrent solvent gradient purification of PEGylated proteins. J Chromatogr A 2023; 1692:463868. [PMID: 36803771 DOI: 10.1016/j.chroma.2023.463868] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 02/06/2023] [Accepted: 02/08/2023] [Indexed: 02/11/2023]
Abstract
Protein PEGylation, i.e. functionalization with poly(ethylene glycol) chains, has been demonstrated an efficient way to improve the therapeutic index of these biopharmaceuticals. We demonstrated that Multicolumn Countercurrent Solvent Gradient Purification (MCSGP) is an efficient process for the separation of PEGylated proteins (Kim et al., Ind. and Eng. Chem. Res. 2021, 60, 29, 10764-10776), thanks to the internal recycling of product-containing side fractions. This recycling phase plays a critical role in the economy of MCSGP as it avoids wasting valuable product, but at the same time impacts its productivity extending the overall process duration. In this study, our aim is to elucidate the role of the gradient slope within this recycling stage on the yield and productivity of MCSGP for two case-studies: PEGylated lysozyme and an industrially relevant PEGylated protein. While all the examples of MCSGP in the literature refer to a single gradient slope in the elution phase, for the first time we systematically investigate three different gradient configurations: i) a single gradient slope throughout the entire elution, ii) recycling with an increased gradient slope, to shed light on the competition between volume of the recycled fraction and required inline dilution and iii) an isocratic elution during the recycling phase. The dual gradient elution proved to be a valuable solution for boosting the recovery of high-value products, with the potential for alleviating the pressure on the upstream processing.
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Affiliation(s)
- Tae Keun Kim
- Department of Chemistry, Materials and Chemical Engineering, Politecnico di Milano, Via Mancinelli 7 20131 Milano, Italy
| | - Abdallah Ayub Bham
- Department of Chemistry, Materials and Chemical Engineering, Politecnico di Milano, Via Mancinelli 7 20131 Milano, Italy
| | - Ismaele Fioretti
- Department of Chemistry, Materials and Chemical Engineering, Politecnico di Milano, Via Mancinelli 7 20131 Milano, Italy
| | - James Angelo
- Biologics Process Development, Global Product Development and Supply, Bristol Myers Squibb, Inc., Devens, MA, 01434, USA
| | - Xuankuo Xu
- Biologics Process Development, Global Product Development and Supply, Bristol Myers Squibb, Inc., Devens, MA, 01434, USA
| | - Sanchayita Ghose
- Biologics Process Development, Global Product Development and Supply, Bristol Myers Squibb, Inc., Devens, MA, 01434, USA
| | - Massimo Morbidelli
- Department of Chemistry, Materials and Chemical Engineering, Politecnico di Milano, Via Mancinelli 7 20131 Milano, Italy
| | - Mattia Sponchioni
- Department of Chemistry, Materials and Chemical Engineering, Politecnico di Milano, Via Mancinelli 7 20131 Milano, Italy.
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Kim TK, Sechi B, Romero Conde JJ, Angelo J, Xu X, Ghose S, Morbidelli M, Sponchioni M. Design and economic investigation of a Multicolumn Countercurrent Solvent Gradient Purification unit for the separation of an industrially relevant PEGylated protein. J Chromatogr A 2022; 1681:463487. [PMID: 36115185 DOI: 10.1016/j.chroma.2022.463487] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 08/31/2022] [Accepted: 09/05/2022] [Indexed: 10/14/2022]
Abstract
Conjugation of biopharmaceuticals to polyethylene glycol chains, known as PEGylation, is nowadays an efficient and widely exploited strategy to improve critical properties of the active molecule, including stability, biodistribution profile, and reduced clearance. A crucial step in the manufacturing of PEGylated drugs is the purification. The reference process in industrial settings is single-column chromatography, which can meet the stringent purity requisites only at the expenses of poor product recoveries. A valuable solution to this trade-off is the Multicolumn Countercurrent Solvent Gradient Purification (MCSGP), which allows the internal and automated recycling of product-containing side fractions that are typically discarded in the batch processes. In this study, an ad hoc design procedure was applied to the single-column batch purification of an industrially relevant PEGylated protein, with the aim of defining optimal collection window, elution duration and elution buffer ionic strength to be then transferred to the MCSGP. This significantly alleviates the design of the continuous operation, subjected to manifold process parameters. The MCSGP designed by directly transferring the optimal parameters allowed to improve the yield and productivity by 8.2% and 17.8%, respectively, when compared to the corresponding optimized batch process, ensuring a purity specification of 98.0%. Once the efficacy of MCSGP was demonstrated, a detailed analysis of its cost of goods was performed and compared to the case of single-column purification. To the best of our knowledge, this is the first example of a detailed economic investigation of the MCSGP across different manufacturing scenarios and process cadences of industrial relevance, which demonstrated not only the viability of this continuous technology but also its flexibility.
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Affiliation(s)
- Tae Keun Kim
- Department of Chemistry, Materials and Chemical Engineering, Politecnico di Milano, Via Mancinelli 7, Milano 20131, Italy
| | - Benedetta Sechi
- Department of Chemistry, Materials and Chemical Engineering, Politecnico di Milano, Via Mancinelli 7, Milano 20131, Italy
| | - Juan Jose Romero Conde
- Biologics Process Development, Global Product Development and Supply, Bristol Myers Squibb Inc., Devens, MA 01434, USA
| | - James Angelo
- Biologics Process Development, Global Product Development and Supply, Bristol Myers Squibb Inc., Devens, MA 01434, USA
| | - Xuankuo Xu
- Biologics Process Development, Global Product Development and Supply, Bristol Myers Squibb Inc., Devens, MA 01434, USA
| | - Sanchayita Ghose
- Biologics Process Development, Global Product Development and Supply, Bristol Myers Squibb Inc., Devens, MA 01434, USA
| | - Massimo Morbidelli
- Department of Chemistry, Materials and Chemical Engineering, Politecnico di Milano, Via Mancinelli 7, Milano 20131, Italy
| | - Mattia Sponchioni
- Department of Chemistry, Materials and Chemical Engineering, Politecnico di Milano, Via Mancinelli 7, Milano 20131, Italy.
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Narayanan H, Luna M, Sokolov M, Butté A, Morbidelli M. Hybrid Models Based on Machine Learning and an Increasing Degree of Process Knowledge: Application to Cell Culture Processes. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.1c04507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Harini Narayanan
- Institute of Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, 8093 Zurich, Switzerland
| | - Martin Luna
- Institute of Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, 8093 Zurich, Switzerland
| | | | | | - Massimo Morbidelli
- DataHow AG, Zürichstrasse 137, 8600 Dübendorf, Switzerland
- Dipartimento di Chimica, Materiali e Ingegneria Chimica, Giulio Natta, Politecnico di Milano, 20131 Milano, Italy
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Fioretti I, Müller-Späth T, Weldon R, Vogg S, Morbidelli M, Sponchioni M. Continuous countercurrent chromatographic twin-column purification of oligonucleotides: the role of the displacement effect. Biotechnol Bioeng 2022; 119:1861-1872. [PMID: 35338661 PMCID: PMC9322279 DOI: 10.1002/bit.28093] [Citation(s) in RCA: 1] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 03/17/2022] [Accepted: 03/20/2022] [Indexed: 11/10/2022]
Abstract
Oligonucleotides (ONs) are breaking through in the biopharmaceutical industry as a promising class of biotherapeutics. The main success of these molecules is due to their peculiar way of acting in the cellular process, regulating the gene expression and hence influencing the protein synthesis at a pre-translational level. Although the Food and Drug Administration (FDA) already approved a few ON-based therapeutics, their production cost strongly limits large scale manufacturing: a situation that can be alleviated through process intensification. In this work, we address this problem by developing an efficient and continuous chromatographic purification process for ONs. In particular, we considered the chromatographic purification of a ON crude prepared by chemical synthesis using anion exchange resins. We demonstrate that in this system the competitive adsorption of the various species on the same sites of the resin leads to the displacement of the more weakly adsorbing species by the more strongly adsorbing ones. This phenomenon affects the behavior of the chromatographic units and it has been investigated in detail. Then, we developed a continuous countercurrent solvent gradient purification (MCSGP) process, which can significantly improve the productivity and buffer consumption compared to a classical single-column, batch chromatographic process. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Ismaele Fioretti
- Department of Chemistry, Materials and Chemical Engineering, Politecnico di Milano, Via Mancinelli 7, Milano, 20131, Italy
| | | | - Richard Weldon
- YMC ChromaCon, Technoparkstrasse 1, 8005, Zürich, Switzerland
| | - Sebastian Vogg
- YMC ChromaCon, Technoparkstrasse 1, 8005, Zürich, Switzerland
| | - Massimo Morbidelli
- Department of Chemistry, Materials and Chemical Engineering, Politecnico di Milano, Via Mancinelli 7, Milano, 20131, Italy
| | - Mattia Sponchioni
- Department of Chemistry, Materials and Chemical Engineering, Politecnico di Milano, Via Mancinelli 7, Milano, 20131, Italy
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Morbidelli M, Moscatelli D, Sponchioni M. Preface to the Giuseppe Storti Festschrift. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c02264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Massimo Morbidelli
- Polytechnic University of Milan, Via Luigi Mancinelli, 7-20131 Milano, Italy
| | - Davide Moscatelli
- Polytechnic University of Milan, Via Luigi Mancinelli, 7-20131 Milano, Italy
| | - Mattia Sponchioni
- Polytechnic University of Milan, Via Luigi Mancinelli, 7-20131 Milano, Italy
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Narayanan H, Luna M, Sokolov M, Arosio P, Butté A, Morbidelli M. Hybrid Models Based on Machine Learning and an Increasing Degree of Process Knowledge: Application to Capture Chromatographic Step. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c01317] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Harini Narayanan
- Institute of Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, 8093 Zurich, Switzerland
| | - Martin Luna
- Institute of Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, 8093 Zurich, Switzerland
| | | | - Paolo Arosio
- Institute of Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, 8093 Zurich, Switzerland
| | | | - Massimo Morbidelli
- DataHow AG, Zürichstrasse 137, 8600 Dübendorf, Switzerland
- Dipartimento di Chimica, Materiali e Ingegneria Chimica, Giulio Natta, Politecnico di Milano, 20131 Milano, Italy
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Kim TK, Botti C, Angelo J, Xu X, Ghose S, Li ZJ, Morbidelli M, Sponchioni M. Experimental Design of the Multicolumn Countercurrent Solvent Gradient Purification (MCSGP) Unit for the Separation of PEGylated Proteins. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c01345] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Tae Keun Kim
- Department of Chemistry, Materials and Chemical Engineering, Politecnico di Milano, Via Mancinelli 7, Milano, 20131, Italy
| | - Chiara Botti
- Department of Chemistry, Materials and Chemical Engineering, Politecnico di Milano, Via Mancinelli 7, Milano, 20131, Italy
| | - James Angelo
- Biologics Process Development, Global Product Development and Supply, Bristol Myers Squibb, Inc., Devens, Massachusetts 01434, United States
| | - Xuankuo Xu
- Biologics Process Development, Global Product Development and Supply, Bristol Myers Squibb, Inc., Devens, Massachusetts 01434, United States
| | - Sanchayita Ghose
- Biologics Process Development, Global Product Development and Supply, Bristol Myers Squibb, Inc., Devens, Massachusetts 01434, United States
| | - Zheng Jian Li
- Biologics Process Development, Global Product Development and Supply, Bristol Myers Squibb, Inc., Devens, Massachusetts 01434, United States
| | - Massimo Morbidelli
- Department of Chemistry, Materials and Chemical Engineering, Politecnico di Milano, Via Mancinelli 7, Milano, 20131, Italy
| | - Mattia Sponchioni
- Department of Chemistry, Materials and Chemical Engineering, Politecnico di Milano, Via Mancinelli 7, Milano, 20131, Italy
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Narayanan H, Seidler T, Luna MF, Sokolov M, Morbidelli M, Butté A. Hybrid Models for the simulation and prediction of chromatographic processes for protein capture. J Chromatogr A 2021; 1650:462248. [PMID: 34087519 DOI: 10.1016/j.chroma.2021.462248] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 04/29/2021] [Accepted: 05/07/2021] [Indexed: 12/11/2022]
Abstract
The biopharmaceutical industries are continuously faced with the pressure to reduce the development costs and accelerate development time scales. The traditional approach of heuristic-based or platform process-based optimization is soon getting obsolete, and more generalized tools for process development and optimization are required to keep pace with the emerging trends. Thus, advanced model-based methods that can reduce the can ensure accelerated development of robust processes with minimal experiments are necessary. Though mechanistic models for chromatography are quite popular, their success is limited by the need to have accurate knowledge of adsorption isotherms and mass transfer kinetics. As an alternative, in this work, a hybrid modeling approach is proposed. Thereby, the chromatographic unit behavior is learned by a combination of neural network and mechanistic model while fitting suitable experimental breakthrough curves. Since this approach does not require identifying suitable mechanistic assumptions for all the phenomena, it can be developed with lower effort. Thus, allowing the scientists to concentrate their focus on process development. The performance of the hybrid model is compared with the mechanistic Lumped kinetic Model for in-silico data and experiments conducted on a system of industrial relevance. The flexibility of the hybrid modeling approach results in about three times higher accuracies compared to Lumped Kinetic Model. This is validated for five different isotherm models used to simulate data, with the hybrid model showing about two to three times lower prediction errors in all the cases. Not only in prediction, but we could also show that the hybrid model is more robust in extrapolating across process conditions with about three times lower error than the LKM. Additionally, it could be demonstrated that an appropriately tailored formulation of the hybrid model can be used to generate representations for the underlying principles such as adsorption equilibria and mass transfer kinetics.
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Affiliation(s)
- Harini Narayanan
- Institute of Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Zurich, Switzerland
| | - Tobias Seidler
- Institute of Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Zurich, Switzerland
| | - Martin Francisco Luna
- Institute of Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Zurich, Switzerland
| | | | - Massimo Morbidelli
- Dipartimento di Chimica, Materiali e Ingegneria Chimica, Giulio Natta, Politecnico di Milano, Italy
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De Luca C, Felletti S, Bozza D, Lievore G, Morbidelli M, Sponchioni M, Cavazzini A, Catani M, Cabri W, Macis M, Ricci A. Process Intensification for the Purification of Peptidomimetics: The Case of Icatibant through Multicolumn Countercurrent Solvent Gradient Purification (MCSGP). Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c00520] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Chiara De Luca
- Department of Chemistry and Pharmaceutical Sciences, University of Ferrara, via L. Borsari 46, Ferrara, 44121, Italy
| | - Simona Felletti
- Department of Chemistry and Pharmaceutical Sciences, University of Ferrara, via L. Borsari 46, Ferrara, 44121, Italy
| | - Desiree Bozza
- Department of Chemistry and Pharmaceutical Sciences, University of Ferrara, via L. Borsari 46, Ferrara, 44121, Italy
| | - Giulio Lievore
- Department of Chemistry and Pharmaceutical Sciences, University of Ferrara, via L. Borsari 46, Ferrara, 44121, Italy
| | - Massimo Morbidelli
- Department of Chemistry, Materials and Chemical Engineering Giulio Natta, Politecnico di Milano, via Mancinelli 7, Milan, 20131, Italy
| | - Mattia Sponchioni
- Department of Chemistry, Materials and Chemical Engineering Giulio Natta, Politecnico di Milano, via Mancinelli 7, Milan, 20131, Italy
| | - Alberto Cavazzini
- Department of Chemistry and Pharmaceutical Sciences, University of Ferrara, via L. Borsari 46, Ferrara, 44121, Italy
| | - Martina Catani
- Department of Chemistry and Pharmaceutical Sciences, University of Ferrara, via L. Borsari 46, Ferrara, 44121, Italy
| | - Walter Cabri
- Department of Chemistry “Giacomo Ciamician”, Alma Mater Studiorum − University of Bologna, Via Selmi 2, Bologna, 40126, Italy
- Fresenius Kabi iPSUM Srl, I&D, Via San Leonardo 23, Villadose (Rovigo), 45010, Italy
| | - Marco Macis
- Fresenius Kabi iPSUM Srl, I&D, Via San Leonardo 23, Villadose (Rovigo), 45010, Italy
| | - Antonio Ricci
- Fresenius Kabi iPSUM Srl, I&D, Via San Leonardo 23, Villadose (Rovigo), 45010, Italy
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Shi C, Vogg S, Lin DQ, Sponchioni M, Morbidelli M. Analysis and optimal design of batch and two-column continuous chromatographic frontal processes for monoclonal antibody purification. Biotechnol Bioeng 2021; 118:3420-3434. [PMID: 33755192 DOI: 10.1002/bit.27763] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 12/04/2020] [Revised: 02/09/2021] [Accepted: 03/12/2021] [Indexed: 11/07/2022]
Abstract
The increasing demand for efficient and robust processes in the purification of monoclonal antibodies (mAbs) has recently brought frontal chromatography to the forefront. Applied during the polishing step, it enables the removal of high molecular weight aggregates from the target product, achieving high purities. Typically, this process is operated in batch using a single column, which makes it intrinsically subjected to a purity-yield tradeoff. This means that high purities can only be achieved at the cost of lowering the product yield and vice versa. Recently, a two-column continuous implementation of frontal chromatography, referred to as Flow2, was developed. Despite being able of alleviating the purity-yield tradeoff typical of batch operations, the increase in the number of process parameters complicates its optimal design, with the risk of not exploiting its full potential. In this study, we developed an ad hoc design procedure (DP) suitable for the optimization of both batch frontal chromatography and Flow2 in terms of purity, yield, and productivity. This procedure provided similar results as a multiobjective optimization based on genetic algorithm but with lower computational effort. Then, batch and Flow2 operated at their optimal conditions were compared. Besides showing a more favorable Pareto front of yield and productivity at a specified purity, the Flow2 process demonstrated improved robustness compared to the batch process with respect to modifications in the loading linear velocity, washing buffer ionic strength and loading time, thus providing an appealing operation for integrated processes.
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Affiliation(s)
- Ce Shi
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, China
| | | | - Dong-Qiang Lin
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, China
| | - Mattia Sponchioni
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Milano, Italy
| | - Massimo Morbidelli
- Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, ETH Zürich, Zürich, Switzerland
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De Luca C, Felletti S, Lievore G, Chenet T, Morbidelli M, Sponchioni M, Cavazzini A, Catani M. Modern trends in downstream processing of biotherapeutics through continuous chromatography: The potential of Multicolumn Countercurrent Solvent Gradient Purification. Trends Analyt Chem 2020; 132:116051. [PMID: 32994652 PMCID: PMC7513800 DOI: 10.1016/j.trac.2020.116051] [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] [Indexed: 12/12/2022]
Abstract
Single-column (batch) preparative chromatography is the technique of choice for purification of biotherapeutics but it is often characterized by an intrinsic limitation in terms of yield-purity trade-off, especially for separations containing a larger number of product-related impurities. This drawback can be alleviated by employing multicolumn continuous chromatography. Among the different methods working in continuous mode, in this paper we will focus in particular on Multicolumn Countercurrent Solvent Gradient Purification (MCSGP) which has been specifically designed for challenging separations of target biomolecules from their product-related impurities. The improvements come from the automatic internal recycling of the impure fractions inside the chromatographic system, which results in an increased yield without compromising the purity of the pool. In this article, steps of the manufacturing process of biopharmaceuticals will be described, as well as the advantages of continuous chromatography over batch processes, by particularly focusing on MCSGP.
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Affiliation(s)
- Chiara De Luca
- Dept. of Chemistry and Pharmaceutical Sciences, University of Ferrara, via L. Borsari 46, 44121 Ferrara, Italy
| | - Simona Felletti
- Dept. of Chemistry and Pharmaceutical Sciences, University of Ferrara, via L. Borsari 46, 44121 Ferrara, Italy
| | - Giulio Lievore
- Dept. of Chemistry and Pharmaceutical Sciences, University of Ferrara, via L. Borsari 46, 44121 Ferrara, Italy
| | - Tatiana Chenet
- Dept. of Chemistry and Pharmaceutical Sciences, University of Ferrara, via L. Borsari 46, 44121 Ferrara, Italy
| | - Massimo Morbidelli
- Dept. of Chemistry, Materials and Chemical Engineering Giulio Natta, Politecnico di Milano, via Mancinelli 7, 20131 Milan, Italy
| | - Mattia Sponchioni
- Dept. of Chemistry, Materials and Chemical Engineering Giulio Natta, Politecnico di Milano, via Mancinelli 7, 20131 Milan, Italy
| | - Alberto Cavazzini
- Dept. of Chemistry and Pharmaceutical Sciences, University of Ferrara, via L. Borsari 46, 44121 Ferrara, Italy
| | - Martina Catani
- Dept. of Chemistry and Pharmaceutical Sciences, University of Ferrara, via L. Borsari 46, 44121 Ferrara, Italy
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Medeiros Garcia Alcântara J, Distante F, Storti G, Moscatelli D, Morbidelli M, Sponchioni M. Current trends in the production of biodegradable bioplastics: The case of polyhydroxyalkanoates. Biotechnol Adv 2020; 42:107582. [DOI: 10.1016/j.biotechadv.2020.107582] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 06/08/2020] [Accepted: 06/18/2020] [Indexed: 12/31/2022]
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Sponchioni M, Manfredini N, Zanoni A, Scibona E, Morbidelli M, Moscatelli D. Readily Adsorbable Thermoresponsive Polymers for the Preparation of Smart Cell-Culturing Surfaces on Site. ACS Biomater Sci Eng 2020; 6:5337-5345. [PMID: 33455282 DOI: 10.1021/acsbiomaterials.0c01029] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The efficacy of several cell therapy products is directly impacted by trypsinization, which can diminish the engrafting capacity of transplanted cells by cleaving cell surface receptors. Thermoresponsive surfaces can alleviate this drawback, enabling temperature-driven and enzyme-free cell harvesting. However, the production of thermoresponsive surfaces relies on dedicated and complex equipment, often involving protocols dependent on high surface activation energies that prevent the development of scalable and universal platforms. In this work, we developed thermoresponsive copolymers incorporating styrene units that enable the copolymer adsorption on tissue culture polystyrene surfaces from an alcoholic solution in a short time, regardless of the vessel size and geometry, and without any particular equipment. In this way, the procedure can be performed with minimal effort by the end user on any surface. The thermoresponsive copolymers were synthesized via reversible addition-fragmentation chain transfer polymerization, providing high control over the polymer microstructure, a key parameter for tuning its cloud point and architecture. Block copolymers comprising a thermoresponsive segment and a polystyrene block exhibited optimal adhesion on conventional cell culture surfaces and permitted a more efficient temperature-mediated harvesting of adipose-derived stromal cells and Chinese hamster ovary cells compared to their statistical counterparts. To expand the application of this polymer deposition protocol to serum-free cell culture, we also considered the polymer modification with the tripeptide arginine-glycine-aspartic acid, known to promote the cell adhesion to synthetic substrates. The incorporation of this peptide enabled the collection in serum-free conditions of intact cell sheets from surfaces prepared shortly before their usage.
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Affiliation(s)
- Mattia Sponchioni
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, via Mancinelli 7, 2013 Milano, Italy
| | - Nicolò Manfredini
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, via Mancinelli 7, 2013 Milano, Italy
| | - Arianna Zanoni
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, via Mancinelli 7, 2013 Milano, Italy
| | - Ernesto Scibona
- Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, ETH Zurich, Vladimir-Prelog-Weg 1, 8093 Zurich, Switzerland
| | - Massimo Morbidelli
- Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, ETH Zurich, Vladimir-Prelog-Weg 1, 8093 Zurich, Switzerland
| | - Davide Moscatelli
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, via Mancinelli 7, 2013 Milano, Italy
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16
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Narayanan H, Behle L, Luna MF, Sokolov M, Guillén‐Gosálbez G, Morbidelli M, Butté A. Hybrid‐EKF: Hybrid model coupled with extended Kalman filter for real‐time monitoring and control of mammalian cell culture. Biotechnol Bioeng 2020; 117:2703-2714. [DOI: 10.1002/bit.27437] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2020] [Revised: 05/15/2020] [Accepted: 05/18/2020] [Indexed: 01/15/2023]
Affiliation(s)
- Harini Narayanan
- Department of Chemistry and Applied BiosciencesInstitute of Chemical and Bioengineering, ETH Zurich Zurich Switzerland
| | - Lars Behle
- Department of Chemistry and Applied BiosciencesInstitute of Chemical and Bioengineering, ETH Zurich Zurich Switzerland
| | - Martin F. Luna
- Department of Chemistry and Applied BiosciencesInstitute of Chemical and Bioengineering, ETH Zurich Zurich Switzerland
| | - Michael Sokolov
- Department of Chemistry and Applied BiosciencesInstitute of Chemical and Bioengineering, ETH Zurich Zurich Switzerland
- DataHow AG Zurich Switzerland
| | - Gonzalo Guillén‐Gosálbez
- Department of Chemistry and Applied BiosciencesInstitute of Chemical and Bioengineering, ETH Zurich Zurich Switzerland
| | - Massimo Morbidelli
- DataHow AG Zurich Switzerland
- Dipartimento di Chimica, Materiali e Ingegneria Chimica "Giulio Natta"Politecnico di Milano Milan Italy
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17
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Ferrari R, Storti G, Morbidelli M. Maltodextrin as stabilizer for emulsion polymerization: Adsorption and grafting behavior. Journal of Polymer Science 2020. [DOI: 10.1002/pol.20200083] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Raffaele Ferrari
- Department of Chemistry and Applied BiosciencesInstitute for Chemical and Bioengineering, ETH Zurich Zurich Switzerland
| | - Giuseppe Storti
- Department of Chemistry and Applied BiosciencesInstitute for Chemical and Bioengineering, ETH Zurich Zurich Switzerland
| | - Massimo Morbidelli
- Department of Chemistry and Applied BiosciencesInstitute for Chemical and Bioengineering, ETH Zurich Zurich Switzerland
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18
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Luca CD, Felletti S, Lievore G, Buratti A, Vogg S, Morbidelli M, Cavazzini A, Catani M, Macis M, Ricci A, Cabri W. From batch to continuous chromatographic purification of a therapeutic peptide through multicolumn countercurrent solvent gradient purification. J Chromatogr A 2020; 1625:461304. [PMID: 32709347 DOI: 10.1016/j.chroma.2020.461304] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [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: 03/27/2020] [Revised: 05/27/2020] [Accepted: 06/01/2020] [Indexed: 12/22/2022]
Abstract
A twin-column Multicolumn Countercurrent Solvent Gradient Purification (MCSGP) process has been developed for the purification of a therapeutic peptide, glucagon, from a crude synthetic mixture. This semi-continuous process uses two identical columns operating either in interconnected or in batch mode, thus enabling the internal recycle of the portions of the eluting stream which do not comply with purity specifications. Because of this feature, which actually results in the simulated countercurrent movement of the stationary phase with respect to the mobile one, the yield-purity trade-off typical of traditional batch preparative chromatography can be alleviated. Moreover, the purification process can be completely automatized. Aim of this work is to present a simple procedure for the development of the MCSGP process based on a single batch experiment, in the case of a therapeutic peptide of industrial relevance. This allowed to recover roughly 90% of the injected glucagon in a purified pool with a purity of about 90%. A comparison between the performance of the MCSGP process and the classical single column batch process indicates that percentage increase in the recovery of target product is +23% when transferring the method from batch conditions to MCSGP, with an unchanged purity of around 89%. This improvement comes at the expenses of a reduction of about 38% in productivity.
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Affiliation(s)
- Chiara De Luca
- Dept. of Chemistry and Pharmaceutical Sciences, University of Ferrara, via L. Borsari 46, 44121 Ferrara, Italy
| | - Simona Felletti
- Dept. of Chemistry and Pharmaceutical Sciences, University of Ferrara, via L. Borsari 46, 44121 Ferrara, Italy
| | - Giulio Lievore
- Dept. of Chemistry and Pharmaceutical Sciences, University of Ferrara, via L. Borsari 46, 44121 Ferrara, Italy
| | - Alessandro Buratti
- Dept. of Chemistry and Pharmaceutical Sciences, University of Ferrara, via L. Borsari 46, 44121 Ferrara, Italy
| | - Sebastian Vogg
- Institute for Chemical and Bioengineering, ETH Zurich, Vladimir-Prelog-Weg 1, 8093 Zurich, Switzerland
| | - Massimo Morbidelli
- Institute for Chemical and Bioengineering, ETH Zurich, Vladimir-Prelog-Weg 1, 8093 Zurich, Switzerland
| | - Alberto Cavazzini
- Dept. of Chemistry and Pharmaceutical Sciences, University of Ferrara, via L. Borsari 46, 44121 Ferrara, Italy
| | - Martina Catani
- Dept. of Chemistry and Pharmaceutical Sciences, University of Ferrara, via L. Borsari 46, 44121 Ferrara, Italy.
| | - Marco Macis
- Fresenius Kabi iPSUM, via San Leonardo 23, 45010, Villadose, Rovigo, Italy
| | - Antonio Ricci
- Fresenius Kabi iPSUM, via San Leonardo 23, 45010, Villadose, Rovigo, Italy.
| | - Walter Cabri
- Fresenius Kabi iPSUM, via San Leonardo 23, 45010, Villadose, Rovigo, Italy; Department of Chemistry "G. Ciamician", University of Bologna, via Selmi 2, 40126, Bologna, Italy
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19
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Zürcher P, Sokolov M, Brühlmann D, Ducommun R, Stettler M, Souquet J, Jordan M, Broly H, Morbidelli M, Butté A. Cell culture process metabolomics together with multivariate data analysis tools opens new routes for bioprocess development and glycosylation prediction. Biotechnol Prog 2020; 36:e3012. [DOI: 10.1002/btpr.3012] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2019] [Revised: 03/24/2020] [Accepted: 04/10/2020] [Indexed: 01/08/2023]
Affiliation(s)
- Philipp Zürcher
- Department of Chemistry and Applied Biosciences Institute of Chemical and Bioengineering ETH Zürich Switzerland
| | - Michael Sokolov
- Department of Chemistry and Applied Biosciences Institute of Chemical and Bioengineering ETH Zürich Switzerland
- DataHow AG Zurich Switzerland
| | - David Brühlmann
- Merck Biopharma, Biotech Process Sciences Corsier‐sur‐Vevey Switzerland
| | - Raphael Ducommun
- Merck Biopharma, Biotech Process Sciences Corsier‐sur‐Vevey Switzerland
| | - Matthieu Stettler
- Merck Biopharma, Biotech Process Sciences Corsier‐sur‐Vevey Switzerland
| | - Jonathan Souquet
- Merck Biopharma, Biotech Process Sciences Corsier‐sur‐Vevey Switzerland
| | - Martin Jordan
- Merck Biopharma, Biotech Process Sciences Corsier‐sur‐Vevey Switzerland
| | - Hervé Broly
- Merck Biopharma, Biotech Process Sciences Corsier‐sur‐Vevey Switzerland
| | - Massimo Morbidelli
- Department of Chemistry and Applied Biosciences Institute of Chemical and Bioengineering ETH Zürich Switzerland
- DataHow AG Zurich Switzerland
| | - Alessandro Butté
- Department of Chemistry and Applied Biosciences Institute of Chemical and Bioengineering ETH Zürich Switzerland
- DataHow AG Zurich Switzerland
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20
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Catani M, De Luca C, Medeiros Garcia Alcântara J, Manfredini N, Perrone D, Marchesi E, Weldon R, Müller-Späth T, Cavazzini A, Morbidelli M, Sponchioni M. Oligonucleotides: Current Trends and Innovative Applications in the Synthesis, Characterization, and Purification. Biotechnol J 2020; 15:e1900226. [PMID: 32298041 DOI: 10.1002/biot.201900226] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 03/17/2020] [Indexed: 12/12/2022]
Abstract
Oligonucleotides (ONs) are gaining increasing importance as a promising novel class of biopharmaceuticals. Thanks to their fundamental role in gene regulation, they can be used to develop custom-made drugs (also called N-to-1) able to act on the gene expression at pre-translational level. With recent approvals of ON-based therapeutics by the Food and Drug Administration (FDA), a growing demand for high-quality chemically modified ONs is emerging and their market is expected to impressively prosper in the near future. To satisfy this growing market demand, a scalable and economically sustainable ON production is needed. In this paper, the state of the art of the whole ON production process is illustrated with the aim of highlighting the most promising routes toward the auspicated market-size production. In particular, the most recent advancements in both the upstream stage, mainly based on solid-phase synthesis and recombinant technology, and the downstream one, focusing on chromatographic techniques, are reviewed. Since ON production is projected to expand to the large scale, automatized multicolumn countercurrent technologies will reasonably be required soon to replace the current ones based on batch single-column operations. This consideration is supported by a recent cutting-edge application of continuous chromatography for the ON purification.
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Affiliation(s)
- Martina Catani
- Department of Chemistry and Pharmaceutical Sciences, University of Ferrara, via L. Borsari 46, Ferrara, 44121, Italy
| | - Chiara De Luca
- Department of Chemistry and Pharmaceutical Sciences, University of Ferrara, via L. Borsari 46, Ferrara, 44121, Italy
| | - João Medeiros Garcia Alcântara
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta,", Politecnico di Milano, via Mancinelli 7, Milano, 20131, Italy
| | - Nicolò Manfredini
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta,", Politecnico di Milano, via Mancinelli 7, Milano, 20131, Italy
| | - Daniela Perrone
- Department of Chemistry and Pharmaceutical Sciences, University of Ferrara, via L. Borsari 46, Ferrara, 44121, Italy
| | - Elena Marchesi
- Department of Chemistry and Pharmaceutical Sciences, University of Ferrara, via L. Borsari 46, Ferrara, 44121, Italy
| | - Richard Weldon
- ChromaCon AG, Technoparkstrasse 1, Zürich, 8005, Switzerland
| | | | - Alberto Cavazzini
- Department of Chemistry and Pharmaceutical Sciences, University of Ferrara, via L. Borsari 46, Ferrara, 44121, Italy
| | - Massimo Morbidelli
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta,", Politecnico di Milano, via Mancinelli 7, Milano, 20131, Italy
| | - Mattia Sponchioni
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta,", Politecnico di Milano, via Mancinelli 7, Milano, 20131, Italy
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21
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Feidl F, Vogg S, Wolf M, Podobnik M, Ruggeri C, Ulmer N, Wälchli R, Souquet J, Broly H, Butté A, Morbidelli M. Process‐wide control and automation of an integrated continuous manufacturing platform for antibodies. Biotechnol Bioeng 2020; 117:1367-1380. [DOI: 10.1002/bit.27296] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Accepted: 02/03/2020] [Indexed: 12/17/2022]
Affiliation(s)
- Fabian Feidl
- Institute for Chemical and BioengineeringDepartment of Chemistry and Applied BiosciencesZurich Switzerland
| | - Sebastian Vogg
- Institute for Chemical and BioengineeringDepartment of Chemistry and Applied BiosciencesZurich Switzerland
| | - Moritz Wolf
- Institute for Chemical and BioengineeringDepartment of Chemistry and Applied BiosciencesZurich Switzerland
| | - Matevz Podobnik
- Institute for Chemical and BioengineeringDepartment of Chemistry and Applied BiosciencesZurich Switzerland
| | - Caterina Ruggeri
- Institute for Chemical and BioengineeringDepartment of Chemistry and Applied BiosciencesZurich Switzerland
| | - Nicole Ulmer
- Institute for Chemical and BioengineeringDepartment of Chemistry and Applied BiosciencesZurich Switzerland
| | - Ruben Wälchli
- Institute for Chemical and BioengineeringDepartment of Chemistry and Applied BiosciencesZurich Switzerland
| | - Jonathan Souquet
- Merck Serono S.A. Biotech Process Sciences Corsier‐sur‐Vevey Switzerland
| | - Hervé Broly
- Merck Serono S.A. Biotech Process Sciences Corsier‐sur‐Vevey Switzerland
| | - Alessandro Butté
- Institute for Chemical and BioengineeringDepartment of Chemistry and Applied BiosciencesZurich Switzerland
| | - Massimo Morbidelli
- Institute for Chemical and BioengineeringDepartment of Chemistry and Applied BiosciencesZurich Switzerland
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22
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Wolf M, Morbidelli M. Development of Mammalian Cell Perfusion Cultures at Lab Scale: From Orbitally Shaken Tubes to Benchtop Bioreactors. Methods Mol Biol 2020; 2095:125-140. [PMID: 31858466 DOI: 10.1007/978-1-0716-0191-4_8] [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] [Indexed: 03/24/2023]
Abstract
This chapter introduces the necessary concepts to develop mammalian cell perfusion cultures for the expression of therapeutic proteins at lab scale. We highlight the operation of the orbitally shaken tubes and of a classical glass vessel reactor system coupled to an external alternating tangential flow (ATF) device. Two different experiments can be performed in the shake-tube system: (1) the VCDmax experiment exploring the maximum achievable viable cell density at a given medium exchange rate and (2) the VCDSS experiment for the prediction of process performance at constant viable cell density and a given medium exchange rate for the design of the benchtop bioreactor process. In addition, the operation of the benchtop system is discussed containing start-up and control procedures for a long-term production run.
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Affiliation(s)
- Moritz Wolf
- Institute for Chemical and Bioengineering, ETH Zurich, Zurich, Switzerland.
| | - Massimo Morbidelli
- Institute for Chemical and Bioengineering, ETH Zurich, Zurich, Switzerland
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23
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De Luca C, Felletti S, Macis M, Cabri W, Lievore G, Chenet T, Pasti L, Morbidelli M, Cavazzini A, Catani M, Ricci A. Modeling the nonlinear behavior of a bioactive peptide in reversed-phase gradient elution chromatography. J Chromatogr A 2019; 1616:460789. [PMID: 31874699 DOI: 10.1016/j.chroma.2019.460789] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [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: 10/22/2019] [Revised: 12/09/2019] [Accepted: 12/12/2019] [Indexed: 01/03/2023]
Abstract
The thermodynamic behavior of octreotide, a cyclic octapeptide with important pharmaceutical functions, has been simulated under reversed-phase gradient elution conditions. To this end, adsorption behavior was firstly investigated in isocratic conditions, under a variety of water/acetonitrile + 0.02% (v/v) trifluoroacetic acid (TFA) mixtures as mobile phase by using a Langmuir isotherm. Organic modifier was varied in the range between 23 and 28% (v/v). Adsorption isotherms were determined by means of the so-called Inverse Method (IM) with a minimum amount of peptide. The linear solvent strength (LSS) model was used to find the correlation between isotherm parameters and mobile phase composition. This study contributes to enlarge our knowledge on the chromatographic behavior under nonlinear gradient conditions of peptides. In particular, it focuses on a cyclic octapeptide.
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Affiliation(s)
- Chiara De Luca
- Dept. of Chemistry and Pharmaceutical Sciences, University of Ferrara, via L. Borsari 46, Ferrara 44121, Italy
| | - Simona Felletti
- Dept. of Chemistry and Pharmaceutical Sciences, University of Ferrara, via L. Borsari 46, Ferrara 44121, Italy
| | - Marco Macis
- Fresenius Kabi iPSUM, via San Leonardo 23, Villadose, Rovigo 45010, Italy
| | - Walter Cabri
- Fresenius Kabi iPSUM, via San Leonardo 23, Villadose, Rovigo 45010, Italy
| | - Giulio Lievore
- Dept. of Chemistry and Pharmaceutical Sciences, University of Ferrara, via L. Borsari 46, Ferrara 44121, Italy
| | - Tatiana Chenet
- Dept. of Chemistry and Pharmaceutical Sciences, University of Ferrara, via L. Borsari 46, Ferrara 44121, Italy
| | - Luisa Pasti
- Dept. of Chemistry and Pharmaceutical Sciences, University of Ferrara, via L. Borsari 46, Ferrara 44121, Italy
| | - Massimo Morbidelli
- Dept. of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, ETH Zurich, Vladimir-Prelog-Weg 1, Zurich 8093, Switzerland
| | - Alberto Cavazzini
- Dept. of Chemistry and Pharmaceutical Sciences, University of Ferrara, via L. Borsari 46, Ferrara 44121, Italy.
| | - Martina Catani
- Dept. of Chemistry and Pharmaceutical Sciences, University of Ferrara, via L. Borsari 46, Ferrara 44121, Italy.
| | - Antonio Ricci
- Fresenius Kabi iPSUM, via San Leonardo 23, Villadose, Rovigo 45010, Italy
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24
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Wälchli R, Ressurreição M, Vogg S, Feidl F, Angelo J, Xu X, Ghose S, Jian Li Z, Le Saoût X, Souquet J, Broly H, Morbidelli M. Understanding mAb aggregation during low pH viral inactivation and subsequent neutralization. Biotechnol Bioeng 2019; 117:687-700. [PMID: 31784982 DOI: 10.1002/bit.27237] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [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: 06/24/2019] [Revised: 10/22/2019] [Accepted: 11/22/2019] [Indexed: 12/31/2022]
Abstract
Monoclonal antibodies (mAbs) and related recombinant proteins continue to gain importance in the treatment of a great variety of diseases. Despite significant advances, their manufacturing can still present challenges owing to their molecular complexity and stringent regulations with respect to product purity, stability, safety, and so forth. In this context, protein aggregates are of particular concern due to their immunogenic potential. During manufacturing, mAbs routinely undergo acidic treatment to inactivate viral contamination, which can lead to their aggregation and thereby to product loss. To better understand the underlying mechanism so as to propose strategies to mitigate the issue, we systematically investigated the denaturation and aggregation of two mAbs at low pH as well as after neutralization. We observed that at low pH and low ionic strength, mAb surface hydrophobicity increased whereas molecular size remained constant. After neutralization of acidic mAb solutions, the fraction of monomeric mAb started to decrease accompanied by an increase on average mAb size. This indicates that electrostatic repulsion prevents denatured mAb molecules from aggregation under acidic pH and low ionic strength, whereas neutralization reduces this repulsion and coagulation initiates. Limiting denaturation at low pH by d-sorbitol addition or temperature reduction effectively improved monomer recovery after neutralization. Our findings might be used to develop innovative viral inactivation procedures during mAb manufacturing that result in higher product yields.
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Affiliation(s)
- Ruben Wälchli
- Department of Chemistry and Applied Biosciences, ETH Zurich, Institute for Chemical and Bioengineering, Zurich, Switzerland
| | - Mariana Ressurreição
- Department of Chemistry and Applied Biosciences, ETH Zurich, Institute for Chemical and Bioengineering, Zurich, Switzerland
| | - Sebastian Vogg
- Department of Chemistry and Applied Biosciences, ETH Zurich, Institute for Chemical and Bioengineering, Zurich, Switzerland
| | - Fabian Feidl
- Department of Chemistry and Applied Biosciences, ETH Zurich, Institute for Chemical and Bioengineering, Zurich, Switzerland
| | - James Angelo
- Biologics Process Development, Global Product Development and Supply, Bristol-Myers Squibb Co., Devens, Massachusetts
| | - Xuankuo Xu
- Biologics Process Development, Global Product Development and Supply, Bristol-Myers Squibb Co., Devens, Massachusetts
| | - Sanchayita Ghose
- Biologics Process Development, Global Product Development and Supply, Bristol-Myers Squibb Co., Devens, Massachusetts
| | - Zheng Jian Li
- Biologics Process Development, Global Product Development and Supply, Bristol-Myers Squibb Co., Devens, Massachusetts
| | - Xavier Le Saoût
- Biotech Process Sciences, Merck KGaA, Corsier-sur-Vevey, Vaud, Switzerland
| | - Jonathan Souquet
- Biotech Process Sciences, Merck KGaA, Corsier-sur-Vevey, Vaud, Switzerland
| | - Hervé Broly
- Biotech Process Sciences, Merck KGaA, Corsier-sur-Vevey, Vaud, Switzerland
| | - Massimo Morbidelli
- Department of Chemistry and Applied Biosciences, ETH Zurich, Institute for Chemical and Bioengineering, Zurich, Switzerland
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25
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Vogg S, Pfeifer F, Ulmer N, Morbidelli M. Process intensification by frontal chromatography: Performance comparison of resin and membrane adsorber for monovalent antibody aggregate removal. Biotechnol Bioeng 2019; 117:662-672. [PMID: 31788778 DOI: 10.1002/bit.27235] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [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: 06/25/2019] [Revised: 10/23/2019] [Accepted: 11/22/2019] [Indexed: 01/22/2023]
Abstract
Aggregates are amongst the most important product-related impurities to be removed during the downstream processing of antibodies due to their potential immunogenicity. Traditional operations use cation-exchange resins in bind-elute mode for their separation. However, frontal analysis is emerging as an alternative. In this study, a three-step process development for a membrane adsorber and a resin material is carried out, allowing the comparison between the stationary phases. Based on a screening study, optimal loading conditions are determined, which show that weak binding is favored on the membrane and strong binding on the resin. Transfer of these findings to breakthrough experiments shows that at 99% pool purity the yield is higher for the membrane, while the resin can be loaded twice as high, exceeding yields of 85%. For the investigated antibody and based on a given regeneration protocol, the productivity of the two phases is similar, ranging around 200 g/(L·h). Due to the higher loading, the resin requires about one-third less buffer than the membrane. Furthermore, the implementation of a wash step after loading allows to further increase yield by about 5%. In comparison to a generic bind-elute process, productivity and buffer consumption are improved by an order of magnitude.
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Affiliation(s)
- Sebastian Vogg
- Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, ETH Zurich, Zurich, Switzerland
| | - Felix Pfeifer
- Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, ETH Zurich, Zurich, Switzerland
| | - Nicole Ulmer
- Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, ETH Zurich, Zurich, Switzerland
| | - Massimo Morbidelli
- Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, ETH Zurich, Zurich, Switzerland
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26
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Manfredini N, Scibona E, Morbidelli M, Moscatelli D, Sponchioni M. 110th Anniversary: Fast and Easy-to-Use Method for Coating Tissue Culture Polystyrene Surfaces with Nonfouling Copolymers To Prevent Cell Adhesion. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b05104] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nicolò Manfredini
- Department of Chemistry, Materials and Chemical Engineering “Giulio Natta”, Politecnico di Milano, Via Mancinelli 7, Milano, 20131, Italy
| | - Ernesto Scibona
- Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, ETH Zurich, Vladimir-Prelog-Weg 1, Zurich, 8093, Switzerland
| | - Massimo Morbidelli
- Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, ETH Zurich, Vladimir-Prelog-Weg 1, Zurich, 8093, Switzerland
| | - Davide Moscatelli
- Department of Chemistry, Materials and Chemical Engineering “Giulio Natta”, Politecnico di Milano, Via Mancinelli 7, Milano, 20131, Italy
| | - Mattia Sponchioni
- Department of Chemistry, Materials and Chemical Engineering “Giulio Natta”, Politecnico di Milano, Via Mancinelli 7, Milano, 20131, Italy
- Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, ETH Zurich, Vladimir-Prelog-Weg 1, Zurich, 8093, Switzerland
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27
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Narayanan H, Luna MF, Stosch M, Cruz Bournazou MN, Polotti G, Morbidelli M, Butté A, Sokolov M. Bioprocessing in the Digital Age: The Role of Process Models. Biotechnol J 2019; 15:e1900172. [DOI: 10.1002/biot.201900172] [Citation(s) in RCA: 90] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Revised: 07/15/2019] [Indexed: 12/20/2022]
Affiliation(s)
- Harini Narayanan
- Institute for Chemical and Bioengineering ETHZ Zurich Switzerland
| | - Martin F. Luna
- Institute for Chemical and Bioengineering ETHZ Zurich Switzerland
| | | | - Mariano Nicolas Cruz Bournazou
- Institute for Chemical and Bioengineering ETHZ Zurich Switzerland
- DataHow AGc/o ETH ZurichHCI, F137Vladimir‐Prelog‐Weg 1 8093 Zurich Switzerland
| | - Gianmarco Polotti
- DataHow AGc/o ETH ZurichHCI, F137Vladimir‐Prelog‐Weg 1 8093 Zurich Switzerland
| | - Massimo Morbidelli
- Institute for Chemical and Bioengineering ETHZ Zurich Switzerland
- DataHow AGc/o ETH ZurichHCI, F137Vladimir‐Prelog‐Weg 1 8093 Zurich Switzerland
| | - Alessandro Butté
- Institute for Chemical and Bioengineering ETHZ Zurich Switzerland
- DataHow AGc/o ETH ZurichHCI, F137Vladimir‐Prelog‐Weg 1 8093 Zurich Switzerland
| | - Michael Sokolov
- Institute for Chemical and Bioengineering ETHZ Zurich Switzerland
- DataHow AGc/o ETH ZurichHCI, F137Vladimir‐Prelog‐Weg 1 8093 Zurich Switzerland
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Bielser JM, Chappuis L, Xiao Y, Souquet J, Broly H, Morbidelli M. Perfusion cell culture for the production of conjugated recombinant fusion proteins reduces clipping and quality heterogeneity compared to batch-mode processes. J Biotechnol 2019; 302:26-31. [DOI: 10.1016/j.jbiotec.2019.06.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 05/14/2019] [Accepted: 06/10/2019] [Indexed: 01/06/2023]
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Ulmer N, Ristanovic D, Morbidelli M. Process for Continuous Fab Production by Digestion of IgG. Biotechnol J 2019; 14:e1800677. [PMID: 31169346 DOI: 10.1002/biot.201800677] [Citation(s) in RCA: 9] [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] [Received: 11/06/2018] [Revised: 05/21/2019] [Indexed: 11/10/2022]
Abstract
Intensified processing and end-to-end integrated continuous manufacturing are increasingly being considered in bioprocessing as an alternative to the current batch-based technologies. Similar approaches can also be used at later stages of the production chain, such as in the post-translational modifications that are often considered for therapeutic proteins. In this work, a process to intensify the enzymatic digestion of immunoglobulin G (IgG) and the purification of the resulting Fab fragment is developed. The process consists of the integration of a continuous packed-bed reactor into a multicolumn chromatographic process. The integration is realized through the development of a novel multicolumn countercurrent solvent gradient purification (MCSGP) process, which, by adding a third column to the classical two-column MCSGP process, allows for continuous loading and then straight-through processing of the mixture leaving the reactor.
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Affiliation(s)
- Nicole Ulmer
- Department of Chemistry and Applied Bioscience, ETH Zurich, Vladimir-Prelog-Weg 1, 8093, Zurich, Switzerland
| | - Dragana Ristanovic
- Department of Chemistry and Applied Bioscience, ETH Zurich, Vladimir-Prelog-Weg 1, 8093, Zurich, Switzerland
| | - Massimo Morbidelli
- Department of Chemistry and Applied Bioscience, ETH Zurich, Vladimir-Prelog-Weg 1, 8093, Zurich, Switzerland
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Narayanan H, Sokolov M, Morbidelli M, Butté A. A new generation of predictive models: The added value of hybrid models for manufacturing processes of therapeutic proteins. Biotechnol Bioeng 2019; 116:2540-2549. [DOI: 10.1002/bit.27097] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Revised: 05/13/2019] [Accepted: 06/18/2019] [Indexed: 12/22/2022]
Affiliation(s)
- Harini Narayanan
- Department of Chemistry and Applied Biosciences, Institute of Chemical and BioengineeringETH Zurich Zurich Switzerland
| | - Michael Sokolov
- Department of Chemistry and Applied Biosciences, Institute of Chemical and BioengineeringETH Zurich Zurich Switzerland
- DataHow AG Zurich Switzerland
| | - Massimo Morbidelli
- Department of Chemistry and Applied Biosciences, Institute of Chemical and BioengineeringETH Zurich Zurich Switzerland
- DataHow AG Zurich Switzerland
| | - Alessandro Butté
- Department of Chemistry and Applied Biosciences, Institute of Chemical and BioengineeringETH Zurich Zurich Switzerland
- DataHow AG Zurich Switzerland
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31
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Hajduk J, Wolf M, Steinhoff R, Karst D, Souquet J, Broly H, Morbidelli M, Zenobi R. Monitoring of antibody glycosylation pattern based on microarray MALDI-TOF mass spectrometry. J Biotechnol 2019; 302:77-84. [PMID: 31260704 DOI: 10.1016/j.jbiotec.2019.06.306] [Citation(s) in RCA: 3] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Revised: 06/11/2019] [Accepted: 06/26/2019] [Indexed: 10/26/2022]
Abstract
Biologically manufactured monoclonal antibodies (mAb) can strongly vary in their efficacy and affinity. Therefore, engineering and production of the mAb is highly regulated and requires product monitoring, especially in terms of N-glycosylation patterns. In this work, we present a high-throughput matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) method based on a microarray technology to monitor N-glycopeptides of IgG1 produced in a perfusion cell culture. A bottom-up approach combined with zwitterionic-hydrophilic interaction liquid chromatography for sample purification was used to determine the day-by-day variation of the terminal galactose within two major N-glycoforms. Our results show that microarrays for mass spectrometry (MAMS) are a robust platform for the rapid determination of the carbohydrate distribution. The spectral repeatability is characterized by a low coefficient of variations (1.7% and 7.1% for the FA2 and FA2G1 structures, respectively) and allows to detect the N-glycosylation variability resulting from operating conditions during the bioreactor process. The observed trend of released N-glycans was confirmed using capillary gel electrophoresis with laser-induced fluorescence detection. Therefore, the microarray technology is a promising analytical tool for glycosylation control during the production process of recombinant proteins.
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Affiliation(s)
- Joanna Hajduk
- Laboratory of Organic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zurich, CH-8093, Zurich, Switzerland
| | - Moritz Wolf
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, CH-8093, Zurich, Switzerland
| | - Robert Steinhoff
- Laboratory of Organic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zurich, CH-8093, Zurich, Switzerland
| | - Daniel Karst
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, CH-8093, Zurich, Switzerland
| | - Jonathan Souquet
- Biotech Process Science Technology & Innovation, Merck-Serono S.A., Corsier-sur-Vevey, Switzerland
| | - Hervé Broly
- Biotech Process Science Technology & Innovation, Merck-Serono S.A., Corsier-sur-Vevey, Switzerland
| | - Massimo Morbidelli
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, CH-8093, Zurich, Switzerland
| | - Renato Zenobi
- Laboratory of Organic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zurich, CH-8093, Zurich, Switzerland.
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Abstract
This chapter summarizes the most common chromatographic mAb and mAb fragment purification methods, starting by elucidating the relevant properties of the compounds and introducing the various chromatography modes that are available and useful for this application. A focus is put on the capture step affinity and ion-exchange chromatography. Aspects of scalability play an important role in judging the suitability of the methods. The chapter introduces also analytical chromatographic methods that can be utilized for quantification and purity control of the product. In the case of mAbs, for most purposes the purity obtained using an affinity capture step is sufficient. Polishing steps are required if material of particularly high purity needs to be generated. For mAb fragments, affinity chromatography is not yet fully established, and the capture step potentially may not provide material of high purity. Therefore, the available polishing techniques are touched upon briefly. In the case of mAb isoform and bispecific antibody purification, countercurrent chromatography techniques have proven to be very useful and a part of this chapter has been dedicated to them, paying tribute to the rising interest in these antibody formats in research and industry.
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Affiliation(s)
- Nicole Ulmer
- ETH Zurich, Institute for Chemical and Bioengineering, Zurich, Switzerland
| | - Sebastian Vogg
- ETH Zurich, Institute for Chemical and Bioengineering, Zurich, Switzerland
| | | | - Massimo Morbidelli
- ETH Zurich, Institute for Chemical and Bioengineering, Zurich, Switzerland.
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33
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Klaue A, Kruck M, Binel P, Friederichs N, Bertola F, Wu H, Morbidelli M. Ziegler–Natta catalyst sonofragmentation for controlling size and size distribution of the produced polymer particles. AIChE J 2019. [DOI: 10.1002/aic.16676] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Antoine Klaue
- Department of Chemistry and Applied BiosciencesInstitute for Chemical and Bioengineering Zurich Switzerland
| | | | - Pietro Binel
- Institute of Process EngineeringDepartment of Mechanical and Process Engineering Zurich Switzerland
| | | | | | - Hua Wu
- Department of Chemistry and Applied BiosciencesInstitute for Chemical and Bioengineering Zurich Switzerland
| | - Massimo Morbidelli
- Department of Chemistry and Applied BiosciencesInstitute for Chemical and Bioengineering Zurich Switzerland
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34
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Feidl F, Garbellini S, Vogg S, Sokolov M, Souquet J, Broly H, Butté A, Morbidelli M. A new flow cell and chemometric protocol for implementing in‐line Raman spectroscopy in chromatography. Biotechnol Prog 2019; 35:e2847. [DOI: 10.1002/btpr.2847] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Revised: 05/08/2019] [Accepted: 05/15/2019] [Indexed: 01/31/2023]
Affiliation(s)
- Fabian Feidl
- Institute of Chemical and BioengineeringETH Zurich Zurich Switzerland
| | - Simone Garbellini
- Institute of Chemical and BioengineeringETH Zurich Zurich Switzerland
| | - Sebastian Vogg
- Institute of Chemical and BioengineeringETH Zurich Zurich Switzerland
| | - Michael Sokolov
- Institute of Chemical and BioengineeringETH Zurich Zurich Switzerland
| | - Jonathan Souquet
- Biotech Process SciencesMerck Serono S.A. Corsier‐sur‐Vevey Switzerland
| | - Hervé Broly
- Biotech Process SciencesMerck Serono S.A. Corsier‐sur‐Vevey Switzerland
| | - Alessandro Butté
- Institute of Chemical and BioengineeringETH Zurich Zurich Switzerland
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35
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Wolf MKF, Müller A, Souquet J, Broly H, Morbidelli M. Process design and development of a mammalian cell perfusion culture in shake‐tube and benchtop bioreactors. Biotechnol Bioeng 2019; 116:1973-1985. [DOI: 10.1002/bit.26999] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 03/15/2019] [Accepted: 04/18/2019] [Indexed: 01/16/2023]
Affiliation(s)
- Moritz K. F. Wolf
- Department of Chemistry and Applied Biosciences, Institute of Chemical and BioengineeringETH ZurichZurich Switzerland
| | - Andrea Müller
- Department of Chemistry and Applied Biosciences, Institute of Chemical and BioengineeringETH ZurichZurich Switzerland
| | - Jonathan Souquet
- Biotech Process SciencesMerck BiopharmaCorsier‐sur‐Vevey Switzerland
| | - Hervé Broly
- Biotech Process SciencesMerck BiopharmaCorsier‐sur‐Vevey Switzerland
| | - Massimo Morbidelli
- Department of Chemistry and Applied Biosciences, Institute of Chemical and BioengineeringETH ZurichZurich Switzerland
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36
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Lorenz M, Paganini C, Storti G, Morbidelli M. Macroporous Polymer⁻Protein Hybrid Materials for Antibody Purification by Combination of Reactive Gelation and Click-Chemistry. Materials (Basel) 2019; 12:E1580. [PMID: 31091797 PMCID: PMC6566266 DOI: 10.3390/ma12101580] [Citation(s) in RCA: 5] [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] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Revised: 05/03/2019] [Accepted: 05/13/2019] [Indexed: 12/03/2022]
Abstract
Clickable core-shell nanoparticles based on poly(styrene-co-divinylbenzene-co-vinylbenzylazide) have been synthesized via emulsion polymerization. The 38 nm sized particles have been swollen by divinyl benzene (DVB) and 2,2'-azobis(2-methylpropionitrile) (AIBN) and subsequently processed under high shear rates in a Z-shaped microchannel giving macroporous microclusters (100 µm), through the reactive gelation process. The obtained clusters were post-functionalized by "click-chemistry" with propargyl-PEG-NHS-ester and propargylglicidyl ether, yielding epoxide or NHS-ester activated polymer supports for bioconjugation. Macroporous affinity materials for antibody capturing were produced by immobilizing recombinant Staphylococcus aureus protein A on the polymeric support. Coupling chemistry exploiting thiol-epoxide ring-opening reactions with cysteine-containing protein A revealed up to three times higher binding capacities compared to the protein without cysteine. Despite the lower binding capacities compared to commercial affinity phases, the produced polymer-protein hybrids can serve as stationary phases for immunoglobulin affinity chromatography as the materials revealed superior intra-particle mass transports.
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Affiliation(s)
- Marcel Lorenz
- Department of Chemistry and Applied Biosciences, Institute of Chemical and Bioengineering, ETH Zurich, 8093 Zurich, Switzerland.
| | - Carolina Paganini
- Department of Chemistry and Applied Biosciences, Institute of Chemical and Bioengineering, ETH Zurich, 8093 Zurich, Switzerland.
| | - Giuseppe Storti
- Department of Chemistry and Applied Biosciences, Institute of Chemical and Bioengineering, ETH Zurich, 8093 Zurich, Switzerland.
| | - Massimo Morbidelli
- Department of Chemistry and Applied Biosciences, Institute of Chemical and Bioengineering, ETH Zurich, 8093 Zurich, Switzerland.
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37
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Bertrand V, Karst DJ, Bachmann A, Cantalupo K, Soos M, Morbidelli M. Transcriptome and proteome analysis of steady-state in a perfusion CHO cell culture process. Biotechnol Bioeng 2019; 116:1959-1972. [PMID: 30997936 DOI: 10.1002/bit.26996] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [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: 05/11/2018] [Revised: 01/31/2019] [Accepted: 03/28/2019] [Indexed: 01/05/2023]
Abstract
Long-term continuous protein production can be reached by perfusion operation. Through the continuous removal of waste metabolites and supply of nutrients, steady-state (SS) conditions are achieved after a certain transient period, where the conditions inside the reactor are not only uniform in space but also constant in time. Such stable conditions may have beneficial influences on the reduction of product heterogeneities. In this study, we investigated the impact of perfusion cultivation on the intracellular physiological state of a CHO cell line producing a monoclonal antibody (mAb) by global transcriptomics and proteomics. Despite stable viable cell density was maintained right from the beginning of the cultivation time, productivity decrease, and a transition phase for metabolites and product quality was observed before reaching SS conditions. These were traced back to three sources of transient behaviors being hydrodynamic flow rates, intracellular dynamics of gene expression as well as metabolism and cell line instability, superimposing each other. However, 99.4% of all transcripts and proteins reached SS during the first week or were at SS from the beginning. These results demonstrate that the stable extracellular conditions of perfusion lead to SS also of the cellular level.
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Affiliation(s)
- Vania Bertrand
- Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, ETH Zurich, Zurich, Switzerland
| | - Daniel J Karst
- Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, ETH Zurich, Zurich, Switzerland
| | - Alessia Bachmann
- RBM S.p.A. Istituto di Ricerche Biomediche A.Marxer, Merck, Rome, Italy
| | - Katia Cantalupo
- RBM S.p.A. Istituto di Ricerche Biomediche A.Marxer, Merck, Rome, Italy
| | - Miroslav Soos
- Department of Chemical Engineering, University of Chemistry and Technology, Technicka 5, 166 28, Prague, Czech Republic
| | - Massimo Morbidelli
- Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, ETH Zurich, Zurich, Switzerland
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38
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Vogg S, Ulmer N, Souquet J, Broly H, Morbidelli M. Experimental Evaluation of the Impact of Intrinsic Process Parameters on the Performance of a Continuous Chromatographic Polishing Unit (MCSGP). Biotechnol J 2019; 14:e1800732. [PMID: 30927513 DOI: 10.1002/biot.201800732] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [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: 12/18/2018] [Revised: 01/24/2019] [Indexed: 11/08/2022]
Abstract
The semicontinuous twin-column multicolumn countercurrent solvent gradient purification (MCSGP) process improves the trade-off between purity and yield encountered in traditional batch chromatography, while its complexity, in terms of hardware requirements and process design, is reduced in comparison to process variants using more columns. In this study, the MCSGP process is experimentally characterized, specifically with respect to its unique degrees of freedom, i.e., the four switching times, which alternate the columns between interconnected and batch states. By means of isolation of the main charge isoform of an antibody, it is shown that purity is determined by the selection of the product collection window with negligible influence from the recycle phases. In addition, the amount of weak and strong impurities can be specifically attributed to the start and end of the collection, respectively. Due to higher abundance of weakly adsorbing impurities, the start of product collection influences productivity and yield more than the other switching times. Furthermore, most of the encountered tendencies scale between different loadings. The found trends can be rationalized from the corresponding batch chromatogram and therefore used during process design to obtain desirable process performances without extensive trial-and-error experimentation or complete model development and calibration.
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Affiliation(s)
- Sebastian Vogg
- Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, ETH Zurich, 8093, Zurich, Switzerland
| | - Nicole Ulmer
- Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, ETH Zurich, 8093, Zurich, Switzerland
| | - Jonathan Souquet
- Biotech Process Sciences, Merck Biopharma, 1809, Corsier-sur-Vevey, Switzerland
| | - Hervé Broly
- Biotech Process Sciences, Merck Biopharma, 1809, Corsier-sur-Vevey, Switzerland
| | - Massimo Morbidelli
- Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, ETH Zurich, 8093, Zurich, Switzerland
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39
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Narayanan H, Sokolov M, Butté A, Morbidelli M. Decision Tree-PLS (DT-PLS) algorithm for the development of process: Specific local prediction models. Biotechnol Prog 2019; 35:e2818. [PMID: 30969466 DOI: 10.1002/btpr.2818] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [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: 11/10/2018] [Revised: 03/15/2019] [Accepted: 03/25/2019] [Indexed: 12/26/2022]
Abstract
This work presents a novel multivariate statistical algorithm, Decision Tree-PLS (DT-PLS), to improve the prediction and understanding of dynamic processes based on local partial least square regression (PLSR) models for characteristic process groups defined based on Decision Tree (DT) analysis. The DT-PLS algorithm is successfully applied to two different cell culture data sets, one obtained from bioreactors of 3.5 L lab scale and the other obtained from the 15 ml ambr microbioreactor system. Substantial improvement in the predictive capabilities of the model can be achieved based on the localization compared to the classical PLSR approach, which is implemented in the commercially available packages. Additionally, the differences in the model parameters of the local models suggest that the governing process variables vary for the different process regimes indicating the different states of the cell under different process conditions.
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Affiliation(s)
- Harini Narayanan
- Institute of Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zürich, Switzerland
| | - Michael Sokolov
- Institute of Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zürich, Switzerland.,DataHow AG, Zurich, Switzerland
| | - Alessandro Butté
- Institute of Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zürich, Switzerland.,DataHow AG, Zurich, Switzerland
| | - Massimo Morbidelli
- Institute of Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zürich, Switzerland.,DataHow AG, Zurich, Switzerland
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40
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Bielser JM, Domaradzki J, Souquet J, Broly H, Morbidelli M. Semi-continuous scale-down models for clone and operating parameter screening in perfusion bioreactors. Biotechnol Prog 2019; 35:e2790. [DOI: 10.1002/btpr.2790] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Revised: 01/07/2019] [Accepted: 02/13/2019] [Indexed: 11/07/2022]
Affiliation(s)
- Jean-Marc Bielser
- Biotech Process Sciences, Merck Biopharma; Vevey Switzerland
- Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, ETH Zürich; Zürich Switzerland
| | | | | | - Hervé Broly
- Biotech Process Sciences, Merck Biopharma; Vevey Switzerland
| | - Massimo Morbidelli
- Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, ETH Zürich; Zürich Switzerland
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41
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Papathanasiou MM, Burnak B, Katz J, Müller-Späth T, Morbidelli M, Shah N, Pistikopoulos EN. Control of Small-Scale Chromatographic Systems Under Disturbances. Computer Aided Chemical Engineering 2019. [DOI: 10.1016/b978-0-12-818597-1.50043-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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42
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Klaue A, Kruck M, Friederichs N, Bertola F, Wu H, Morbidelli M. Insight into the Synthesis Process of an Industrial Ziegler–Natta Catalyst. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b05296] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Antoine Klaue
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, 8093 Zurich, Switzerland
| | - Matthias Kruck
- SABIC, Technology & Innovation, P.O. Box 319, 6160 AH Geleen, The Netherlands
| | - Nic Friederichs
- SABIC, Technology & Innovation, P.O. Box 319, 6160 AH Geleen, The Netherlands
| | - Francesco Bertola
- SABIC, Technology & Innovation, P.O. Box 319, 6160 AH Geleen, The Netherlands
| | - Hua Wu
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, 8093 Zurich, Switzerland
| | - Massimo Morbidelli
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, 8093 Zurich, Switzerland
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43
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Ferrari R, Sponchioni M, Morbidelli M, Moscatelli D. Polymer nanoparticles for the intravenous delivery of anticancer drugs: the checkpoints on the road from the synthesis to clinical translation. Nanoscale 2018; 10:22701-22719. [PMID: 30512025 DOI: 10.1039/c8nr05933k] [Citation(s) in RCA: 106] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
In this review article we discuss some of the key aspects concerning the development of a polymer-based nanoparticle formulation for intravenous drug delivery. Since numerous preparations fail before and during clinical trials, our aim is to emphasize the main issues that a nanocarrier has to face once injected into the body. These include biocompatibility and toxicity, drug loading and release, nanoparticle storage and stability, biodistribution, selectivity towards the target organs or tissues, internalization in cells and biodegradability. They represent the main checkpoints to define a polymer-based formulation as safe and effective. Indeed, this review is intended to provide guidelines to be followed in the early development of a new nanotherapeutic to hopefully increase the success rate of polymer-based formulations entering clinical trials. The corresponding requirements and characteristics are discussed in the context of some relevant case studies taken from the literature and mainly related to the delivery of lipophilic anticancer therapeutics.
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Affiliation(s)
- R Ferrari
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, 8093, Zurich, Switzerland.
| | - M Sponchioni
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, 8093, Zurich, Switzerland. and Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Via Mancinelli 7, 20131 Milano, Italy
| | - M Morbidelli
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, 8093, Zurich, Switzerland.
| | - D Moscatelli
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Via Mancinelli 7, 20131 Milano, Italy
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44
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45
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Caimi S, Klaue A, Wu H, Morbidelli M. Effect of SiO₂ Nanoparticles on the Performance of PVdF-HFP/Ionic Liquid Separator for Lithium-Ion Batteries. Nanomaterials (Basel) 2018; 8:E926. [PMID: 30413021 PMCID: PMC6267017 DOI: 10.3390/nano8110926] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Revised: 11/02/2018] [Accepted: 11/05/2018] [Indexed: 01/31/2023]
Abstract
Safety concerns related to the use of potentially explosive, liquid organic electrolytes in commercial high-power lithium-ion batteries are constantly rising. One promising alternative is to use thermally stable ionic liquids (ILs) as conductive media, which are however, limited by low ionic conductivity at room temperature. This can be improved by adding fillers, such as silica or alumina nanoparticles (NPs), in the polymer matrix that hosts the IL. To maximize the effect of such NPs, they have to be uniformly dispersed in the matrix while keeping their size as small as possible. In this work, starting from a water dispersion of silica NPs, we present a novel method to incorporate silica NPs at the nanoscale level (<200 nm) into PVdF-HFP polymer clusters, which are then blended with the IL solution and hot-pressed to form separators suitable for battery applications. The effect of different amounts of silica in the polymer matrix on the ionic conductivity and cyclability of the separator is investigated. A membrane containing 10 wt.% of silica (with respect to the polymer) was shown to maximize the performance of the separator, with a room temperature ionic conductivity of of 1.22 mS cm - 1 . The assembled half-coin cell with LiFePO 4 and Li as the cathode and the anode exhibited a capacity retention of more than 80% at a current density of 2C and 60 ∘ C.
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Affiliation(s)
- Stefano Caimi
- Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, ETH Zurich, 8093 Zurich, Switzerland.
| | - Antoine Klaue
- Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, ETH Zurich, 8093 Zurich, Switzerland.
| | - Hua Wu
- Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, ETH Zurich, 8093 Zurich, Switzerland.
| | - Massimo Morbidelli
- Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, ETH Zurich, 8093 Zurich, Switzerland.
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46
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Baur D, Angelo J, Chollangi S, Müller-Späth T, Xu X, Ghose S, Li ZJ, Morbidelli M. Model-assisted process characterization and validation for a continuous two-column protein A capture process. Biotechnol Bioeng 2018; 116:87-98. [DOI: 10.1002/bit.26849] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Revised: 10/03/2018] [Accepted: 10/05/2018] [Indexed: 12/16/2022]
Affiliation(s)
- Daniel Baur
- Department of Chemistry and Applied Biosciences; ETH Zürich; Zürich Switzerland
| | - James Angelo
- Biologics Process Development, Global Product Development and Supply, Bristol-Myers Squibb, Inc; Devens Massachusetts
| | - Srinivas Chollangi
- Biologics Process Development, Global Product Development and Supply, Bristol-Myers Squibb, Inc; Devens Massachusetts
| | | | - Xuankuo Xu
- Biologics Process Development, Global Product Development and Supply, Bristol-Myers Squibb, Inc; Devens Massachusetts
| | - Sanchayita Ghose
- Biologics Process Development, Global Product Development and Supply, Bristol-Myers Squibb, Inc; Devens Massachusetts
| | - Zheng Jian Li
- Biologics Process Development, Global Product Development and Supply, Bristol-Myers Squibb, Inc; Devens Massachusetts
| | - Massimo Morbidelli
- Department of Chemistry and Applied Biosciences; ETH Zürich; Zürich Switzerland
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Wolf MK, Lorenz V, Karst DJ, Souquet J, Broly H, Morbidelli M. Development of a shake tube‐based scale‐down model for perfusion cultures. Biotechnol Bioeng 2018; 115:2703-2713. [DOI: 10.1002/bit.26804] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 07/10/2018] [Accepted: 07/16/2018] [Indexed: 01/10/2023]
Affiliation(s)
- Moritz K.F. Wolf
- Department of Chemistry and Applied BiosciencesInstitute of Chemical and Bioengineering, ETH ZurichZurich Switzerland
| | - Veronika Lorenz
- Department of Chemistry and Applied BiosciencesInstitute of Chemical and Bioengineering, ETH ZurichZurich Switzerland
| | - Daniel J. Karst
- Department of Chemistry and Applied BiosciencesInstitute of Chemical and Bioengineering, ETH ZurichZurich Switzerland
| | - Jonathan Souquet
- Biotech Process Sciences, Merck BiopharmaCorsier‐sur‐Vevey Switzerland
| | - Hervé Broly
- Biotech Process Sciences, Merck BiopharmaCorsier‐sur‐Vevey Switzerland
| | - Massimo Morbidelli
- Department of Chemistry and Applied BiosciencesInstitute of Chemical and Bioengineering, ETH ZurichZurich Switzerland
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48
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Capasso Palmiero U, Morosi L, Lupi M, Ponzo M, Frapolli R, Zucchetti M, Ubezio P, Morbidelli M, D'Incalci M, Bello E, Moscatelli D. Self-Assembling PCL-Based Nanoparticles as PTX Solubility Enhancer Excipients. Macromol Biosci 2018; 18:e1800164. [DOI: 10.1002/mabi.201800164] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Revised: 06/19/2018] [Indexed: 12/31/2022]
Affiliation(s)
- Umberto Capasso Palmiero
- Department of Chemistry; Materials and Chemical Engineering “Giulio Natta”; Politecnico di Milano; Via Mancinelli 7 20131 Milano Italy
- Department of Chemistry and Applied Biosciences; Institute for Chemical and Bioengineering; Vladimir-Prelog-Weg 1-5/10 8093 Zürich Switzerland
| | - Lavinia Morosi
- Department of Oncology; IRCCS, Istituto di Ricerche Farmacologiche Mario Negri; Via La Masa 19 20156 Milano Italy
| | - Monica Lupi
- Department of Oncology; IRCCS, Istituto di Ricerche Farmacologiche Mario Negri; Via La Masa 19 20156 Milano Italy
| | - Marianna Ponzo
- Department of Oncology; IRCCS, Istituto di Ricerche Farmacologiche Mario Negri; Via La Masa 19 20156 Milano Italy
| | - Roberta Frapolli
- Department of Oncology; IRCCS, Istituto di Ricerche Farmacologiche Mario Negri; Via La Masa 19 20156 Milano Italy
| | - Massimo Zucchetti
- Department of Oncology; IRCCS, Istituto di Ricerche Farmacologiche Mario Negri; Via La Masa 19 20156 Milano Italy
| | - Paolo Ubezio
- Department of Oncology; IRCCS, Istituto di Ricerche Farmacologiche Mario Negri; Via La Masa 19 20156 Milano Italy
| | - Massimo Morbidelli
- Department of Chemistry and Applied Biosciences; Institute for Chemical and Bioengineering; Vladimir-Prelog-Weg 1-5/10 8093 Zürich Switzerland
| | - Maurizio D'Incalci
- Department of Oncology; IRCCS, Istituto di Ricerche Farmacologiche Mario Negri; Via La Masa 19 20156 Milano Italy
| | - Ezia Bello
- Department of Oncology; IRCCS, Istituto di Ricerche Farmacologiche Mario Negri; Via La Masa 19 20156 Milano Italy
| | - Davide Moscatelli
- Department of Chemistry; Materials and Chemical Engineering “Giulio Natta”; Politecnico di Milano; Via Mancinelli 7 20131 Milano Italy
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49
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Rosenboom JG, Hohl DK, Fleckenstein P, Storti G, Morbidelli M. Bottle-grade polyethylene furanoate from ring-opening polymerisation of cyclic oligomers. Nat Commun 2018; 9:2701. [PMID: 30042388 PMCID: PMC6057881 DOI: 10.1038/s41467-018-05147-y] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2018] [Accepted: 06/15/2018] [Indexed: 11/16/2022] Open
Abstract
Polyethylene furanoate (PEF) represents a promising renewable resource-based bioplastic as replacement for fossil-based polyethylene terephthalate (PET) with improved material properties. However, the synthesis of PEF through conventional polycondensation remains challenging, since the time-intensive reaction leads to degradation and undesired discolouration of the product. Here we show the successful rapid synthesis of bottle-grade PEF via ring-opening polymerisation (ROP) from cyclic PEF oligomers within minutes, thereby avoiding degradation and discolouration. The melting point of such mixture of cyclic oligomers lies around 370 °C, well above the degradation temperature of PEF (~329 °C). This challenge can be overcome, exploiting the self-plasticising effect of the forming polymer itself (which melts around 220 °C) by initiation in the presence of a high boiling, yet removable, and inert liquid plasticiser. This concept yields polymer grades required for bottle applications (Mn > 30 kg mol−1, conversion > 95%, colour-free products), and can be extended to other diffusion-limited polymer systems. The synthesis of polyethylene furanoate, a promising renewable resource-based bioplastic, still has challenges. Here the authors show that bottle-grade polyethylene furanoate can be obtained within minutes from ring-opening polymerisation of its cyclic oligomers, thereby avoiding degradation and discolouration.
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Affiliation(s)
- Jan-Georg Rosenboom
- Institute for Chemical and Bioengineering, ETH Zurich, Vladimir-Prelog-Weg 1-5/10, 8093, Zurich, Switzerland
| | - Diana Kay Hohl
- Institute for Chemical and Bioengineering, ETH Zurich, Vladimir-Prelog-Weg 1-5/10, 8093, Zurich, Switzerland
| | - Peter Fleckenstein
- Institute for Chemical and Bioengineering, ETH Zurich, Vladimir-Prelog-Weg 1-5/10, 8093, Zurich, Switzerland
| | - Giuseppe Storti
- Institute for Chemical and Bioengineering, ETH Zurich, Vladimir-Prelog-Weg 1-5/10, 8093, Zurich, Switzerland
| | - Massimo Morbidelli
- Institute for Chemical and Bioengineering, ETH Zurich, Vladimir-Prelog-Weg 1-5/10, 8093, Zurich, Switzerland.
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Guven I, Gezici O, Bayrakci M, Morbidelli M. Calixarene-immobilized monolithic cryogels for preparative protein chromatography. J Chromatogr A 2018; 1558:59-68. [DOI: 10.1016/j.chroma.2018.05.026] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 05/06/2018] [Accepted: 05/12/2018] [Indexed: 11/16/2022]
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