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Zhang T, Jiang Z, Wu Y, Li Q, Liu C, Zhang Y, Liu Q. [Production of adeno-associated virus in insect cells using multiple gene deleted baculovirus]. Sheng Wu Gong Cheng Xue Bao 2024; 40:473-484. [PMID: 38369834 DOI: 10.13345/j.cjb.230325] [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] [Subscribe] [Scholar Register] [Indexed: 02/20/2024]
Abstract
Adeno-associated virus (AAV) is one of the most frequently used viral vectors in the field of gene therapy. However, the industrial production of AAV is facing key bottlenecks such as low yield and high-cost. The aim of this study was to establish a technology system for production of AAV in the double virus infected insects by using multiple-gene deleted baculovirus. First, a multiple gene deleted baculovirus for AAV production was constructed, and the baculovirus titer and its effect on infected cells was examined. Subsequently, the insect cells were co-infected with the double baculovirus and the infection conditions were optimized. At the final stage, we performed AAV production based on optimized conditions, and evaluated relevant parameters including production titer and quality. The results showed that the titer of AAV produced in the multiple gene deleted baculovirus was not different from that of the wild type, but the rate of cell death was significantly slower upon infection. Using the double virus route for optimized production of AAV, the genome titers were 1.63×1011 VG/mL for Bac4.0-1 and 1.02×1011 VG/mL for Bac5.0-2, which were elevated 240% and 110%, respectively, compared with that of the wild-type. Electron microscopy observations revealed that all three groups exhibited normal AAV viral morphology and they showed similar transduction activity. Taken together, we developed an AAV production system based on the infection of insect cells using multiple-gene deleted baculovirus, which significantly improved the virus yield and showed application potential.
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Affiliation(s)
- Tong Zhang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Zhuohan Jiang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Yifan Wu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Qianru Li
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Chenjing Liu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Yuanxing Zhang
- Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai 200237, China
| | - Qin Liu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
- Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai 200237, China
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Marques WL, Mans R, Marella ER, Cordeiro RL, van den Broek M, Daran JMG, Pronk JT, Gombert AK, van Maris AJA. Elimination of sucrose transport and hydrolysis in Saccharomyces cerevisiae: a platform strain for engineering sucrose metabolism. FEMS Yeast Res 2017; 17:fox006. [PMID: 28087672 PMCID: PMC5424818 DOI: 10.1093/femsyr/fox006] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [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] [Accepted: 01/12/2017] [Indexed: 12/17/2022] Open
Abstract
Many relevant options to improve efficacy and kinetics of sucrose metabolism in Saccharomyces cerevisiae and, thereby, the economics of sucrose-based processes remain to be investigated. An essential first step is to identify all native sucrose-hydrolysing enzymes and sucrose transporters in this yeast, including those that can be activated by suppressor mutations in sucrose-negative strains. A strain in which all known sucrose-transporter genes (MAL11, MAL21, MAL31, MPH2, MPH3) were deleted did not grow on sucrose after 2 months of incubation. In contrast, a strain with deletions in genes encoding sucrose-hydrolysing enzymes (SUC2, MAL12, MAL22, MAL32) still grew on sucrose. Its specific growth rate increased from 0.08 to 0.25 h−1 after sequential batch cultivation. This increase was accompanied by a 3-fold increase of in vitro sucrose-hydrolysis and isomaltase activities, as well as by a 3- to 5-fold upregulation of the isomaltase-encoding genes IMA1 and IMA5. One-step Cas9-mediated deletion of all isomaltase-encoding genes (IMA1-5) completely abolished sucrose hydrolysis. Even after 2 months of incubation, the resulting strain did not grow on sucrose. This sucrose-negative strain can be used as a platform to test metabolic engineering strategies and for fundamental studies into sucrose hydrolysis or transport.
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Affiliation(s)
- Wesley Leoricy Marques
- Department of Biotechnology, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, the Netherlands.,School of Food Engineering, University of Campinas, Campinas, SP 13083-862, Brazil
| | - Robert Mans
- Department of Biotechnology, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, the Netherlands
| | - Eko Roy Marella
- Department of Biotechnology, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, the Netherlands
| | | | - Marcel van den Broek
- Department of Biotechnology, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, the Netherlands
| | - Jean-Marc G Daran
- Department of Biotechnology, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, the Netherlands
| | - Jack T Pronk
- Department of Biotechnology, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, the Netherlands
| | - Andreas K Gombert
- School of Food Engineering, University of Campinas, Campinas, SP 13083-862, Brazil
| | - Antonius J A van Maris
- Department of Biotechnology, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, the Netherlands
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