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Liu HN, Wang XY, Zou Y, Wu WB, Lin Y, Ji BY, Wang TY. Synthetic enhancers including TFREs improve transgene expression in CHO cells. Heliyon 2024; 10:e26901. [PMID: 38468921 PMCID: PMC10926067 DOI: 10.1016/j.heliyon.2024.e26901] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Revised: 02/12/2024] [Accepted: 02/21/2024] [Indexed: 03/13/2024] Open
Abstract
The human cytomegalovirus major immediate early gene (CMV) promoter is currently the most preferred promoter for recombinant therapeutic proteins (RTPs) production in CHO cells. To enhance the production of RTPs, five synthetic enhancers including multiple transcription factor regulatory elements (TFREs) were evaluated to enhance recombinant protein level in transient and stably transfected CHO cells. Compared with the control, four elements can enhance the report genes expression under both two transfected states. Further, the function of these four enhancers on human serum albumin (HSA) were investigated. We found that the transient expression can increase by up to 1.5 times, and the stably expression can maximum increase by up to 2.14 times. The enhancement of transgene expression was caused by the boost of their corresponding mRNA levels. Transcriptomics analysis was performed and found that transcriptional activation and cell cycle regulation genes were involved. In conclusion, optimization of enhancers in the CMV promoter could increase the production yield of transgene in transfected CHO cells, which has significance for developing high-yield CHO cell expression system.
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Affiliation(s)
- Hui-Ning Liu
- International Joint Research Laboratory for Recombinant Pharmaceutical Protein Expression System of Henan, Xinxiang Medical University, Xinxiang 453003, China
- SanQuan College of Xinxiang Medical University, Xinxiang 453003, China
| | - Xiao-Yin Wang
- International Joint Research Laboratory for Recombinant Pharmaceutical Protein Expression System of Henan, Xinxiang Medical University, Xinxiang 453003, China
- Department of Biochemistry and Molecular Biology, School of Basic Medicine, Xinxiang Medical University, Xinxiang 453003, China
| | - Ying Zou
- International Joint Research Laboratory for Recombinant Pharmaceutical Protein Expression System of Henan, Xinxiang Medical University, Xinxiang 453003, China
- Department of Biochemistry and Molecular Biology, School of Basic Medicine, Xinxiang Medical University, Xinxiang 453003, China
| | - Wen-Bao Wu
- Shanghai Immunocan Biotech Co., LTD, Shanghai 200000, China
| | - Yan Lin
- International Joint Research Laboratory for Recombinant Pharmaceutical Protein Expression System of Henan, Xinxiang Medical University, Xinxiang 453003, China
| | - Bo-Yu Ji
- International Joint Research Laboratory for Recombinant Pharmaceutical Protein Expression System of Henan, Xinxiang Medical University, Xinxiang 453003, China
| | - Tian-Yun Wang
- International Joint Research Laboratory for Recombinant Pharmaceutical Protein Expression System of Henan, Xinxiang Medical University, Xinxiang 453003, China
- Department of Biochemistry and Molecular Biology, School of Basic Medicine, Xinxiang Medical University, Xinxiang 453003, China
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Zhou L, Wu H, Du M, Song H, Huo N, Chen X, Su X, Li W, Wang L, Wang J, Huang B, Tan F, Tian K. A canine-derived chimeric antibody with high neutralizing activity against canine parvovirus-2. AMB Express 2022; 12:76. [PMID: 35705721 PMCID: PMC9200918 DOI: 10.1186/s13568-022-01416-8] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Accepted: 06/08/2022] [Indexed: 12/02/2022] Open
Abstract
Canine parvovirus-2 (CPV-2) infection causes serious multisystemic disease in dogs and many animal species worldwide. Previously, a monoclonal antibody (MAb) of CPV-2, 10H4, showed high neutralizing activity and therapeutic effect against CPV-2 in dogs. However, the application of mouse MAb is limited in other animals due to immune rejection. Here, the variable regions of the heavy and light chains of 10H4 were cloned and ligated with constant canine antibody regions to produce a canine-derived chimeric MAb 11D9, in a CHO-S cell expression system. The cell supernatant of the CHO cell line 11D9 exhibited a HI titer of 1:2560 against all the variants of CPV-2 (new CPV-2a, new CPV-2b, and CPV-2c), and had the same average neutralization titer as the new CPV-2a (1:11,046.5) and new CPV-2b (1:11,046.5) variants, which was slightly higher than that of CPV-2c variants (1:10,615.7). In animal experiment, the treatment of chimeric MAb 11D9 had a high therapeutic effect in beagles infected with the new CPV-2a. Overall, the canine-derived chimeric MAb 11D9 produced by CHO-S cells showed a high HI and neutralization titer against CPV-2 and the therapeutic effects against the new CPV-2a in beagles, providing potential for the prevention or treatment of CPV-2 infections in dogs. A canine-derived chimeric MAb 11D9 was produced by CHO cell lines. The MAb 11D9 exhibited high HI and neutralization titers against new CPV-2 variants. The MAb 11D9 had a high therapeutic effect in beagles infected with the new CPV-2a variant.
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Affiliation(s)
- Lixuan Zhou
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, China
| | - Hongchao Wu
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, China.,National Research Center for Veterinary Medicine, Luoyang, China
| | - Mengmeng Du
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, China
| | - Huanhuan Song
- National Research Center for Veterinary Medicine, Luoyang, China
| | - Ningning Huo
- National Research Center for Veterinary Medicine, Luoyang, China.,Luoyang Huizhong Biotech Co., Ltd., Luoyang, China
| | - Xiao Chen
- National Research Center for Veterinary Medicine, Luoyang, China
| | - Xiaorui Su
- National Research Center for Veterinary Medicine, Luoyang, China
| | - Weiguo Li
- National Research Center for Veterinary Medicine, Luoyang, China
| | - Lulu Wang
- National Research Center for Veterinary Medicine, Luoyang, China
| | - Jie Wang
- National Research Center for Veterinary Medicine, Luoyang, China.,Luoyang Huizhong Biotech Co., Ltd., Luoyang, China
| | - Baicheng Huang
- National Research Center for Veterinary Medicine, Luoyang, China.
| | - Feifei Tan
- National Research Center for Veterinary Medicine, Luoyang, China.
| | - Kegong Tian
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, China. .,National Research Center for Veterinary Medicine, Luoyang, China.
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Zhao Y, Xing J, Xing JZ, Ang WT, Chen J. Applications of low-intensity pulsed ultrasound to increase monoclonal antibody production in CHO cells using shake flasks or wavebags. Ultrasonics 2014; 54:1439-1447. [PMID: 24841953 DOI: 10.1016/j.ultras.2014.04.025] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2013] [Revised: 04/19/2014] [Accepted: 04/27/2014] [Indexed: 06/03/2023]
Abstract
Many technologies, such as cell line screening and host cell engineering, culture media optimization and bioprocess optimization, have been proposed to increase monoclonal antibody (mAb) production in Chinese Hamster Ovary (CHO) cells. Unlike the existing biochemical approaches, we investigated stimulation using low-intensity pulsed ultrasound (LIPUS) as a purely physical approach, offering enhanced scalability, contamination control and cost-efficiency, while demonstrating significantly increased cell growth and antibody production. It was found that daily ultrasound treatments at 40 mW/cm(2) for 5 min during cell culture increased the production of human anti-IL-8 antibody by more than 30% using 10 or 30 mL shake flasks. Further increasing the ultrasound dosage (either intensities or the treatment duration) did not appreciably increase cell growth or antibody production, however feeding the culture with additional highly-concentrated nutrients, glucose and amino acids (glutamine in this case), did further increase cell growth and antibody titer to 35%. Similar ultrasound treatments (40 mW/cm(2), 5 min per day) when scaled up to larger volume wavebags, resulted in a 25% increase in antibody production. Increased antibody production can be attributed to both elevated cell count and the ultrasound stimulation. Theoretical study of underlying mechanisms was performed through the simulations of molecular dynamics using the AMBER software package, with results showing that LIPUS increases cell permeability. The significance of this study is that LIPUS, as a physical-based stimulation approach, can be externally applied to the cell culture without worrying about contamination. By combining with the existing technologies in antibody production, LIPUS can achieve additional mAb yields. Because it can be easily integrated with existing cell culture apparatuses, the technology is expected to be more acceptable by the end users.
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Affiliation(s)
- Yupeng Zhao
- Department of Biomedical Engineering, University of Alberta, Edmonton, Alberta, Canada
| | - Jida Xing
- Department of Electrical and Computer Engineering, University of Alberta, Edmonton, Alberta, Canada
| | - James Z Xing
- IntelligentNano Inc., Edmonton, Alberta, Canada; Department of Laboratory Medicine & Pathology, University of Alberta, Canada
| | - Woon T Ang
- IntelligentNano Inc., Edmonton, Alberta, Canada
| | - Jie Chen
- Department of Biomedical Engineering, University of Alberta, Edmonton, Alberta, Canada; Department of Electrical and Computer Engineering, University of Alberta, Edmonton, Alberta, Canada.
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