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Dhaver P, Sithole T, Pletschke B, Sithole B, Govinden R. Enhanced production of a recombinant xylanase (XT6): optimization of production and purification, and scaled-up batch fermentation in a stirred tank bioreactor. Sci Rep 2023; 13:20895. [PMID: 38017111 PMCID: PMC10684889 DOI: 10.1038/s41598-023-48202-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Accepted: 11/23/2023] [Indexed: 11/30/2023] Open
Abstract
The endoxylanase XT6 produced by Geobacillus stearothermophilus is a desirable candidate for industrial applications. In this study, the gene encoding XT6 was cloned using the pET-28a expression vector and expressed in Escherichia coli BL21 (DE3) cells. Recombinant XT6 production was improved by optimizing cell lysis (sonication, chemical, and enzymatic lysis) and expression conditions. Sonication in a 0.05 M sodium phosphate (pH 6.0) buffer resulted in the highest xylanase activity (16.48 U/ml). Screening and optimization of induction conditions using the Plackett-Burman Design and Box-Behnken Design (BBD) approaches revealed that cell density pre-induction (OD600 nm), post-induction incubation time, and IPTG concentration significantly (p < 0.05) influenced the expression levels of XT6 (16.48 U/ml to 40.06 U/ml) representing a 3.60-fold increase. BBD resulted in a further 8.74-fold increase in activity to 144.02 U/ml. Batch fermentation in a 5-l stirred tank bioreactor at 1 vvm aeration boosted recombinant xylanase production levels to 165 U/ml suggesting that heterologous expression of the XT6 enzyme is suitable for scaled-up production. The pure enzyme with a molecular weight of 43 kDa and a 15.69-fold increase in purity was obtained using affinity chromatography and a cobalt column. Future studies will include application of the purified recombinant xylanase to animal feed.
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Affiliation(s)
- Priyashini Dhaver
- Discipline of Microbiology, School of Life Sciences, University of KwaZulu-Natal, Westville Campus, Durban, 4000, South Africa
| | - Tariro Sithole
- Enzyme Science Programme (ESP), Department of Biochemistry and Microbiology, Rhodes University, Makhanda (Grahamstown), 6140, Eastern Cape, South Africa
| | - Brett Pletschke
- Enzyme Science Programme (ESP), Department of Biochemistry and Microbiology, Rhodes University, Makhanda (Grahamstown), 6140, Eastern Cape, South Africa.
| | - Bruce Sithole
- Biorefinery Industry Development Facility, Council for Scientific and Industrial Research, Durban, 4000, South Africa
- Discipline of Chemical Engineering, University of KwaZulu-Natal, Durban, 4000, South Africa
| | - Roshini Govinden
- Discipline of Microbiology, School of Life Sciences, University of KwaZulu-Natal, Westville Campus, Durban, 4000, South Africa
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Simão VA, Brand H, da Silveira-Antunes RN, Fukasawa JT, Leme J, Tonso A, Ribeiro-Paes JT. Adipose-derived stem cells (ASCs) culture in spinner flask: improving the parameters of culture in a microcarrier-based system. Biotechnol Lett 2023:10.1007/s10529-023-03367-x. [PMID: 37171697 DOI: 10.1007/s10529-023-03367-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Revised: 03/17/2023] [Accepted: 03/24/2023] [Indexed: 05/13/2023]
Abstract
Prior to clinical use, extensive in vitro proliferation of human adipose-derived stem cells (ASCs) is required. Among the current options, spinner-type stirred flasks, which use microcarriers to increase the yield of adherent cells, are recommended. Here, we propose a methodology for ASCs proliferation through cell suspension culture using Cultispher-S® microcarriers (MC) under agitation in a spinner flask, with the aim of establishing a system that reconciles the efficiency of cell yield with high viability of the culture during two distinct phases: seeding and proliferation. The results showed that cell adhesion was potentiated under intermittent stirring at 70 rpm in the presence of 10% FBS for an initial cell concentration of 2.4 × 104 cells/mL in the initial 24 h of cultivation. In the proliferation phase, kinetic analysis showed that cell growth was higher under continuous agitation at 50 rpm with a culture medium renewal regime of 50% every 72 h, which was sufficient to maintain the culture at optimal levels of nutrients and metabolites for up to nine days of cultivation, representing an 11.1-fold increase and a maximum cell productivity of 422 cells/mL/h (1.0 × 105 viable cells/mL). ASCs maintained the immunophenotypic characteristics and mesodermal differentiation potential of both cell lines from different donors. The established protocol represents a more efficient and cost-effective method to obtain a high proliferation rate of ASCs in a microcarrier-based system, which is necessary for large-scale use in cell therapy, highlighting that the manipulation of critical parameters optimizes the ASCs production process.
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Affiliation(s)
- Vinícius Augusto Simão
- Department of Genetics, School of Medicine, University of São Paulo, Ribeirão Preto, São Paulo, Brazil.
| | - Heloisa Brand
- Department of Biotechnology, School of Sciences and Letters, São Paulo State University (UNESP), Assis, São Paulo, Brazil
| | | | | | - Jaci Leme
- Center for Development and Innovation, Laboratory of Viral Biotechnology, Butantan Institute, São Paulo, São Paulo, Brazil
| | - Aldo Tonso
- Department of Chemical Engineering, Polytechnic School, University of São Paulo, São Paulo, São Paulo, Brazil
| | - João Tadeu Ribeiro-Paes
- Department of Biotechnology, School of Sciences and Letters, São Paulo State University (UNESP), Assis, São Paulo, Brazil
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Biochemical monitoring throughout all stages of rabies virus-like particles production by Raman spectroscopy using global models. J Biotechnol 2023; 363:19-31. [PMID: 36587847 DOI: 10.1016/j.jbiotec.2022.12.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Accepted: 12/27/2022] [Indexed: 12/30/2022]
Abstract
This work aimed to quantify growth and biochemical parameters (viable cell density, Xv; cell viability, CV; glucose, lactate, glutamine, glutamate, ammonium, and potassium concentrations) in upstream stages to obtain rabies virus-like particles (rabies VLP) from insect cell-baculovirus system using on-line and off-line Raman spectra to calibrate global models with minimal experimental data. Five cultivations in bioreactor were performed. The first one comprised the growth of uninfected Spodoptera frugiperda (Sf9) cells, the second and third runs to obtain recombinant baculovirus (rBV) bearing Rabies G glycoprotein and matrix protein, respectively. The fourth one involved the generation of rabies VLP from rBVs and the last one was a repetition of the third one with cell inoculum infected by rBV. The spectra were acquired through a Raman spectrometer with a 785-nm laser source. The fitted Partial Least Square models for nutrients and metabolites were comparable with those previously reported for mammalian cell lines (Relative error < 15 %). However, the use of this chemometrics approach for Xv and CV was not as accurate as it was for other parameters. The findings from this work established the basis for bioprocess Raman spectroscopical monitoring using insect cells for VLP manufacturing, which are gaining ground in the pharmaceutical industry.
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Manstein F, Ullmann K, Kropp C, Halloin C, Triebert W, Franke A, Farr CM, Sahabian A, Haase A, Breitkreuz Y, Peitz M, Brüstle O, Kalies S, Martin U, Olmer R, Zweigerdt R. High density bioprocessing of human pluripotent stem cells by metabolic control and in silico modeling. Stem Cells Transl Med 2021; 10:1063-1080. [PMID: 33660952 PMCID: PMC8235132 DOI: 10.1002/sctm.20-0453] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 01/18/2021] [Accepted: 01/24/2021] [Indexed: 12/13/2022] Open
Abstract
To harness the full potential of human pluripotent stem cells (hPSCs) we combined instrumented stirred tank bioreactor (STBR) technology with the power of in silico process modeling to overcome substantial, hPSC‐specific hurdles toward their mass production. Perfused suspension culture (3D) of matrix‐free hPSC aggregates in STBRs was applied to identify and control process‐limiting parameters including pH, dissolved oxygen, glucose and lactate levels, and the obviation of osmolality peaks provoked by high density culture. Media supplements promoted single cell‐based process inoculation and hydrodynamic aggregate size control. Wet lab‐derived process characteristics enabled predictive in silico modeling as a new rational for hPSC cultivation. Consequently, hPSC line‐independent maintenance of exponential cell proliferation was achieved. The strategy yielded 70‐fold cell expansion in 7 days achieving an unmatched density of 35 × 106 cells/mL equivalent to 5.25 billion hPSC in 150 mL scale while pluripotency, differentiation potential, and karyotype stability was maintained. In parallel, media requirements were reduced by 75% demonstrating the outstanding increase in efficiency. Minimal input to our in silico model accurately predicts all main process parameters; combined with calculation‐controlled hPSC aggregation kinetics, linear process upscaling is also enabled and demonstrated for up to 500 mL scale in an independent bioreactor system. Thus, by merging applied stem cell research with recent knowhow from industrial cell fermentation, a new level of hPSC bioprocessing is revealed fueling their automated production for industrial and therapeutic applications.
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Affiliation(s)
- Felix Manstein
- Leibniz Research Laboratories for Biotechnology and Artificial Organs (LEBAO), Germany.,REBIRTH Cluster of Excellence, Hannover Medical School, Hannover, Germany
| | - Kevin Ullmann
- Leibniz Research Laboratories for Biotechnology and Artificial Organs (LEBAO), Germany.,REBIRTH Cluster of Excellence, Hannover Medical School, Hannover, Germany
| | - Christina Kropp
- Leibniz Research Laboratories for Biotechnology and Artificial Organs (LEBAO), Germany.,REBIRTH Cluster of Excellence, Hannover Medical School, Hannover, Germany
| | - Caroline Halloin
- Leibniz Research Laboratories for Biotechnology and Artificial Organs (LEBAO), Germany.,REBIRTH Cluster of Excellence, Hannover Medical School, Hannover, Germany
| | - Wiebke Triebert
- Leibniz Research Laboratories for Biotechnology and Artificial Organs (LEBAO), Germany.,REBIRTH Cluster of Excellence, Hannover Medical School, Hannover, Germany
| | - Annika Franke
- Leibniz Research Laboratories for Biotechnology and Artificial Organs (LEBAO), Germany.,REBIRTH Cluster of Excellence, Hannover Medical School, Hannover, Germany
| | - Clara-Milena Farr
- Leibniz Research Laboratories for Biotechnology and Artificial Organs (LEBAO), Germany.,REBIRTH Cluster of Excellence, Hannover Medical School, Hannover, Germany
| | - Anais Sahabian
- Leibniz Research Laboratories for Biotechnology and Artificial Organs (LEBAO), Germany.,REBIRTH Cluster of Excellence, Hannover Medical School, Hannover, Germany
| | - Alexandra Haase
- Leibniz Research Laboratories for Biotechnology and Artificial Organs (LEBAO), Germany.,REBIRTH Cluster of Excellence, Hannover Medical School, Hannover, Germany
| | - Yannik Breitkreuz
- Institute of Reconstructive Neurobiology, University of Bonn Medical Faculty & University Hospital Bonn, Bonn, Germany
| | - Michael Peitz
- Institute of Reconstructive Neurobiology, University of Bonn Medical Faculty & University Hospital Bonn, Bonn, Germany.,Cell Programming Core Facility, University of Bonn Medical Faculty, Bonn, Germany
| | - Oliver Brüstle
- Institute of Reconstructive Neurobiology, University of Bonn Medical Faculty & University Hospital Bonn, Bonn, Germany
| | - Stefan Kalies
- Institute of Quantum Optics, Leibniz University Hannover, Hannover, Germany.,Lower Saxony Centre for Biomedical Engineering, Implant Research and Development, Hannover, Germany
| | - Ulrich Martin
- Leibniz Research Laboratories for Biotechnology and Artificial Organs (LEBAO), Germany.,REBIRTH Cluster of Excellence, Hannover Medical School, Hannover, Germany
| | - Ruth Olmer
- Leibniz Research Laboratories for Biotechnology and Artificial Organs (LEBAO), Germany.,REBIRTH Cluster of Excellence, Hannover Medical School, Hannover, Germany
| | - Robert Zweigerdt
- Leibniz Research Laboratories for Biotechnology and Artificial Organs (LEBAO), Germany.,REBIRTH Cluster of Excellence, Hannover Medical School, Hannover, Germany
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