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Recent progress on lateral flow immunoassays in foodborne pathogen detection. FOOD BIOSCI 2023. [DOI: 10.1016/j.fbio.2023.102475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
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Wu M, Ke Q, Bi J, Li X, Huang S, Liu Z, Ge L. Substantially Improved Electrofusion Efficiency of Hybridoma Cells: Based on the Combination of Nanosecond and Microsecond Pulses. Bioengineering (Basel) 2022; 9:bioengineering9090450. [PMID: 36134996 PMCID: PMC9495357 DOI: 10.3390/bioengineering9090450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 09/04/2022] [Accepted: 09/05/2022] [Indexed: 11/26/2022] Open
Abstract
As the initial antibody technology, the preparation of hybridoma cells has been widely used in discovering antibody drugs and is still in use. Various antibody drugs obtained through this technology have been approved for treating human diseases. However, the key to producing hybridoma cells is efficient cell fusion. High-voltage microsecond pulsed electric fields (μsHVPEFs) are currently one of the most common methods used for cell electrofusion. Nevertheless, the membrane potential induced by the external microsecond pulse is proportional to the diameter of the cell, making it difficult to fuse cells of different sizes. Although nanosecond pulsed electric fields (nsPEFs) can achieve the fusion of cells of different sizes, due to the limitation of pore size, deoxyribonucleic acid (DNA) cannot efficiently pass through the cell pores produced by nsPEFs. This directly causes the significant loss of the target gene and reduces the proportion of positive cells after fusion. To achieve an electric field environment independent of cell size and enable efficient cell fusion, we propose a combination of nanosecond pulsed electric fields and low-voltage microsecond pulsed electric fields (ns/μsLVPEFs) to balance the advantages and disadvantages of the two techniques. The results of fluorescence experiments and hybridoma culture experiments showed that after lymphocytes and myeloma cells were stimulated by a pulse (ns/μsLVPEF, μsHVPEF, and control), compared with μsHVPEF, applying ns/μsLVPEF at the same energy could increase the cell fusion efficiency by 1.5–3.0 times. Thus far, we have combined nanosecond and microsecond pulses and provided a practical solution that can significantly increase cell fusion efficiency. This efficient cell fusion method may contribute to the further development of hybridoma technology in electrofusion.
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Affiliation(s)
- Meng Wu
- College of Veterinary Medicine, Hunan Agricultural University, Changsha 410128, China
- Chongqing Academy of Animal Sciences, Chongqing 402460, China
| | - Qiang Ke
- Nanjing Research Institute of Electronics Technology, Nanjing 210039, China
- State Key Laboratory of Power Transmission Equipment & System Security and New Technology, School of Electrical Engineering, Chongqing University, Chongqing 400044, China
- School of Nuclear Engineering, Purdue University, West Lafayette, IN 47906, USA
- Correspondence: (Q.K.); (Z.L.); (L.G.)
| | - Jinhao Bi
- College of Veterinary Medicine, Jilin Agricultural University, Changchun 130118, China
- School of Life Sciences, Westlake University, Hangzhou 310024, China
| | - Xinhao Li
- State Key Laboratory of Power Transmission Equipment & System Security and New Technology, School of Electrical Engineering, Chongqing University, Chongqing 400044, China
| | - Shuheng Huang
- College of Bioengineering, Chongqing University, Chongqing 400044, China
- Department of Biochemistry, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Zuohua Liu
- Chongqing Academy of Animal Sciences, Chongqing 402460, China
- Correspondence: (Q.K.); (Z.L.); (L.G.)
| | - Liangpeng Ge
- Chongqing Academy of Animal Sciences, Chongqing 402460, China
- Correspondence: (Q.K.); (Z.L.); (L.G.)
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