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Alizadeh F, Aghajani H, Mahboudi F, Talebkhan Y, Arefian E, Samavat S, Raufi R. Optimization of culture condition for Spodoptera frugiperda by design of experiment approach and evaluation of its effect on the expression of hemagglutinin protein of influenza virus. PLoS One 2024; 19:e0308547. [PMID: 39150957 PMCID: PMC11329130 DOI: 10.1371/journal.pone.0308547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2024] [Accepted: 07/26/2024] [Indexed: 08/18/2024] Open
Abstract
The baculovirus expression vector system (BEVS) is a powerful tool in pharmaceutical biotechnology to infect insect cells and produce the recombinant proteins of interest. It has been well documented that optimizing the culture condition and its supplementation through designed experiments is critical for maximum protein production. In this study, besides physicochemical parameters including incubation temperature, cell count of infection, multiplicity of infection, and feeding percentage, potential supplementary factors such as cholesterol, polyamine, galactose, pluronic-F68, glucose, L-glutamine, and ZnSO4 were screened for Spodoptera frugiperda (Sf9) cell culture and expression of hemagglutinin (HA) protein of Influenza virus via Placket-Burman design and then optimized through Box-Behnken approach. The optimized conditions were then applied for scale-up culture and the expressed r-HA protein was characterized. Optimization of selected parameters via the Box-Behnken approach indicated that feed percentage, cell count, and multiplicity of infection are the main parameters affecting r-HA expression level and potency compared to the previously established culture condition. This study demonstrated the effectiveness of designing experiments to select and optimize important parameters that potentially affect Sf9 cell culture, r-HA expression, and its potency in the BEVS system.
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Affiliation(s)
- Fatemeh Alizadeh
- Biotechnology Research Center, Department of Medical Biotechnology, Pasteur Institute of Iran, Tehran, Iran
- Department of Research & Development, AryoGen Pharmed Inc., Karaj, Iran
| | - Hamideh Aghajani
- Department of Research & Development, AryoGen Pharmed Inc., Karaj, Iran
| | - Fereidoun Mahboudi
- Biotechnology Research Center, Department of Medical Biotechnology, Pasteur Institute of Iran, Tehran, Iran
- Department of Research & Development, AryoGen Pharmed Inc., Karaj, Iran
| | - Yeganeh Talebkhan
- Biotechnology Research Center, Department of Medical Biotechnology, Pasteur Institute of Iran, Tehran, Iran
| | - Ehsan Arefian
- Molecular Virology Lab, Department of Microbiology, School of Biology, College of Science, University of Tehran, Tehran, Iran
| | - Sepideh Samavat
- Department of Research & Development, AryoGen Pharmed Inc., Karaj, Iran
| | - Rouhollah Raufi
- Department of Research & Development, AryoGen Pharmed Inc., Karaj, Iran
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Correia R, Fernandes B, M Alves P, Roldão A. Adaptive Laboratory Evolution to Improve Recombinant Protein Production Using Insect Cells. Methods Mol Biol 2024; 2829:79-90. [PMID: 38951328 DOI: 10.1007/978-1-0716-3961-0_6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/03/2024]
Abstract
Adaptive laboratory evolution (ALE) is a powerful tool for enhancing the fitness of cell lines in specific applications, including recombinant protein production. Through adaptation to nonstandard culture conditions, cells can develop specific traits that make them high producers. Despite being widely used for microorganisms and, to lesser extent, for mammalian cells, ALE has been poorly leveraged for insect cells. Here, we describe a method for adapting insect High Five and Sf9 cells to nonstandard culture conditions via an ALE approach. Aiming to demonstrate the potential of ALE to improve productivity of insect cells, two case studies are demonstrated. In the first, we adapted insect High Five cells from their standard pH (6.2) to neutral pH (7.0); this adaptation allowed to improve production of influenza virus-like particles (VLPs) by threefold, using the transient baculovirus expression vector system. In the second, we adapted insect Sf9 cells from their standard culture temperature (27 °C) to hypothermic growth (22 °C); this adaptation allowed to improve production of influenza VLPs by sixfold, using stable cell lines. These examples demonstrate the potential of ALE for enhancing productivity within distinct insect cell hosts and expression systems by manipulating different culture conditions.
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Affiliation(s)
- Ricardo Correia
- iBET, Instituto de Biologia Experimental e Tecnológica, Oeiras, Portugal
- ITQB NOVA, Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Oeiras, Portugal
| | - Bárbara Fernandes
- iBET, Instituto de Biologia Experimental e Tecnológica, Oeiras, Portugal
- ITQB NOVA, Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Oeiras, Portugal
| | - Paula M Alves
- iBET, Instituto de Biologia Experimental e Tecnológica, Oeiras, Portugal
- ITQB NOVA, Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Oeiras, Portugal
| | - António Roldão
- iBET, Instituto de Biologia Experimental e Tecnológica, Oeiras, Portugal.
- ITQB NOVA, Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Oeiras, Portugal.
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Cai Q, Zeng M, Wu X, Wu H, Zhan Y, Tian R, Zhang M. CaMKIIα-driven, phosphatase-checked postsynaptic plasticity via phase separation. Cell Res 2020; 31:37-51. [PMID: 33235361 DOI: 10.1038/s41422-020-00439-9] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2020] [Accepted: 10/27/2020] [Indexed: 11/09/2022] Open
Abstract
Ca2+/calmodulin-dependent kinase IIα (CaMKIIα) is essential for synaptic plasticity and learning by decoding synaptic Ca2+ oscillations. Despite decades of extensive research, new mechanisms underlying CaMKIIα's function in synapses are still being discovered. Here, we discover that Shank3 is a specific binding partner for autoinhibited CaMKIIα. We demonstrate that Shank3 and GluN2B, via combined actions of Ca2+ and phosphatases, reciprocally bind to CaMKIIα. Under basal condition, CaMKIIα is recruited to the Shank3 subcompartment of postsynaptic density (PSD) via phase separation. Rise of Ca2+ concentration induces GluN2B-mediated recruitment of active CaMKIIα and formation of the CaMKIIα/GluN2B/PSD-95 condensates, which are autonomously dispersed upon Ca2+ removal. Protein phosphatases control the Ca2+-dependent shuttling of CaMKIIα between the two PSD subcompartments and PSD condensate formation. Activation of CaMKIIα further enlarges the PSD assembly and induces structural LTP. Thus, Ca2+-induced and phosphatase-checked shuttling of CaMKIIα between distinct PSD nano-domains can regulate phase separation-mediated PSD assembly and synaptic plasticity.
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Affiliation(s)
- Qixu Cai
- Division of Life Science, State Key Laboratory of Molecular Neuroscience, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Menglong Zeng
- Division of Life Science, State Key Laboratory of Molecular Neuroscience, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China.,McGovern Institute for Brain Research, Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Xiandeng Wu
- Division of Life Science, State Key Laboratory of Molecular Neuroscience, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Haowei Wu
- Division of Life Science, State Key Laboratory of Molecular Neuroscience, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Yumeng Zhan
- Division of Life Science, State Key Laboratory of Molecular Neuroscience, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Ruijun Tian
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, China
| | - Mingjie Zhang
- Division of Life Science, State Key Laboratory of Molecular Neuroscience, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China. .,Center of Systems Biology and Human Health, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China.
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Ikehara T, Kuniyoshi K, Yamaguchi H, Tanabe Y, Sano T, Yoshimoto M, Oshiro N, Nakashima S, Yasumoto-Hirose M. First Report of Microcystis Strains Producing MC-FR and -WR Toxins in Japan. Toxins (Basel) 2019; 11:toxins11090521. [PMID: 31505765 PMCID: PMC6784158 DOI: 10.3390/toxins11090521] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2019] [Revised: 09/06/2019] [Accepted: 09/06/2019] [Indexed: 11/16/2022] Open
Abstract
Microcystins (MCs) are a group of cyclic heptapeptide hepatotoxins produced by Microcystis and several other genera of cyanobacteria. Many structural variants have been characterized using various methods such as liquid chromatography-mass spectrometry (LC-MS) analysis, enzyme-linked immunosorbent assay (ELISA) and protein phosphatase 2A (PP2A) inhibition assay. The representative MC, MC-LR, and related cyanobacterial toxins strongly inhibit PP2A activity and can therefore be assayed by measuring the extent of PP2A inhibition. However, these methods require reference toxin standards for the quantification and identification of known MCs. To obtain various MC-producing cyanobacterial strains, we surveyed and collected MC-producing cyanobacteria from environmental sources of water in Okinawa, Japan. Using a dual assay (LC-MS analysis and PP2A inhibition assay), we identified and isolated Microcystis strains producing five MC variants (MC-LR, -RR, -LA, -FR and -WR). Approximately 4 mg of MC-WR and -FR toxins were purified from the laboratory culture of the Microcystis isolate NIES-4344. Pure MC-WR and -FR variants were prepared for future use as toxin standards in LC-MS analysis. Phylogenetic analysis based on ftsZ revealed that the NIES-4344 strain belongs to the identified groups in Microcystis aeruginosa. This is the first report of Microcystis strains producing mainly MC-WR and -FR toxins in Japan.
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Affiliation(s)
- Tsuyoshi Ikehara
- Department of Food Science and Technology, National Fisheries University, 2-7-1 Nagata-honmachi, Shimonoseki, Yamaguchi 759-6595, Japan.
| | - Kyoko Kuniyoshi
- National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki, Kanagawa 210-9501, Japan.
| | - Haruyo Yamaguchi
- National Institute for Environmental Studies, Onogawa 16-2, Tsukuba, Ibaraki 305-8506, Japan.
| | - Yuuhiko Tanabe
- National Institute for Environmental Studies, Onogawa 16-2, Tsukuba, Ibaraki 305-8506, Japan.
| | - Tomoharu Sano
- National Institute for Environmental Studies, Onogawa 16-2, Tsukuba, Ibaraki 305-8506, Japan.
| | - Masahiro Yoshimoto
- Okinawa Institute for the Conservation of the Environment Co. Ltd., 7-11 Suzaki, Uruma, Okinawa 904-2234, Japan.
| | - Naomasa Oshiro
- National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki, Kanagawa 210-9501, Japan.
| | - Shihoko Nakashima
- Faculty of Sports and Health Science, Fukuoka University, Fukuoka 814-0180, Japan.
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Yabe R, Tsuji S, Mochida S, Ikehara T, Usui T, Ohama T, Sato K. A stable association with PME-1 may be dispensable for PP2A demethylation - implications for the detection of PP2A methylation and immunoprecipitation. FEBS Open Bio 2018; 8:1486-1496. [PMID: 30186749 PMCID: PMC6120246 DOI: 10.1002/2211-5463.12485] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Revised: 06/06/2018] [Accepted: 06/27/2018] [Indexed: 12/03/2022] Open
Abstract
Reversible methyl-esterification (methylation) of Leu309 in the protein phosphatase 2A catalytic subunit (PP2Ac) is essential for proper biogenesis of the PP2A holoenzyme. Accumulating evidence links PP2Ac methylation to diseases, including cancer and neurodegenerative disorders. Protein phosphatase methyl-esterase (PME-1) specifically catalyzes PP2Ac demethylation. We demonstrate that PP2Ac is demethylated in cell extracts even at 0 °C unless prevented by a PME-1 methyl-esterase inhibitor. This promotes dissociation of PP2A heterotrimers with B55 or PR72 subunits, but not those with B56 subunits. These results reveal differential sensitivity of ABC heterotrimers to methylation status of the C subunit. Our study advocates caution when interpreting earlier findings, offers an effective protocol for preserving PP2A complexes, and reveals key distinctions between B subunits and their interactions with the AC core dimer of PP2A.
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Affiliation(s)
- Ryotaro Yabe
- Laboratory of Veterinary PharmacologyJoint Faculty of Veterinary MedicineYamaguchi UniversityJapan
| | - Shunya Tsuji
- Laboratory of Veterinary PharmacologyJoint Faculty of Veterinary MedicineYamaguchi UniversityJapan
| | - Satoru Mochida
- Priority Organization for Innovation and ExcellenceKumamoto UniversityJapan
| | - Tsuyoshi Ikehara
- Department of Food Science and TechnologyNational Fisheries UniversityShimonosekiJapan
| | - Tatsuya Usui
- Laboratory of Veterinary PharmacologyFaculty of AgricultureTokyo University of Agriculture and TechnologyFuchuJapan
| | - Takashi Ohama
- Laboratory of Veterinary PharmacologyJoint Faculty of Veterinary MedicineYamaguchi UniversityJapan
| | - Koichi Sato
- Laboratory of Veterinary PharmacologyJoint Faculty of Veterinary MedicineYamaguchi UniversityJapan
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McKenzie EA, Abbott WM. Expression of recombinant proteins in insect and mammalian cells. Methods 2018; 147:40-49. [PMID: 29778647 DOI: 10.1016/j.ymeth.2018.05.013] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Revised: 05/10/2018] [Accepted: 05/15/2018] [Indexed: 12/12/2022] Open
Abstract
Purified recombinant proteins are key reagents in academic and industrial research. The ability to make these proteins quickly often relies on the availability of higher eukaryotic cell hosts such as insect and mammalian cells where there is a very wide range of post-translational modifications, protein folding and trafficking pathways. This enables the generation of many proteins that cannot be made in microbial hosts. In this article we outline some of the most commonly used methods to express recombinant proteins in insect and mammalian cells.
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Affiliation(s)
- Edward A McKenzie
- Protein Expression Facility, Manchester Institute of Biotechnology, Faculty of Life Sciences, 131 Princess Street, Manchester M1 7DN, UK
| | - W Mark Abbott
- Peak Proteins Ltd, Alderley Park, Cheshire SK10 4TG, UK.
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