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Zhou X, Liu Y, Tang C, Cheng L, Zheng S, Zheng Y, Chen M, Yang H, Zou Q, Lai L. [Generation of genetic modified pigs devoid of GGTA1 and expressing the human leukocyte antigen-G5]. Sheng Wu Gong Cheng Xue Bao 2022; 38:1096-1111. [PMID: 35355477 DOI: 10.13345/j.cjb.210655] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Pigs are considered as ideal donors for xenotransplantation because they have many physiological and anatomical characteristics similar to human beings. However, antibody-mediated immunity, which includes both natural and induced antibody responses, is a major challenge for the success of pig-to-primate xenotransplantation. Various genetic modification methods help to tailor pigs to be appropriate donors for xenotransplantation. In this study, we applied transcription activator-like effector nuclease (TALEN) to knock out the porcine α-1, 3-galactosyltransferase gene GGTA1, which encodes Gal epitopes that induce hyperacute immune rejection in pig-to-human xenotransplantation. Meanwhile, human leukocyte antigen-G5 gene HLA-G5, which acts as an immunosuppressive factor, was co-transfected with TALEN into porcine fetal fibroblasts. The cell colonies of GGTA1 biallelic knockout with positive transgene for HLA-G5 were chosen as nuclear donors to generate genetic modified piglets through a single round of somatic cell nuclear transfer. As a result, we successfully obtained 20 modified piglets that were positive for GGTA1 knockout (GTKO) and half of them expressed the HLA-G5 protein. Gal epitopes on the cell membrane of GTKO/HLA-G5 piglets were completely absent. Western blotting and immunofluorescence showed that HLA-G5 was expressed in the modified piglets. Functionally, the fibroblasts from the GTKO/HLA-G5 piglets showed enhanced resistance to complement-mediated lysis ability compared with those from GTKO-only or wild-type pigs. These results indicate that the GTKO/HLA-G5 pigs could be a valuable donor model to facilitate laboratory studies and clinics for xenotransplantation.
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Affiliation(s)
- Xiaoqing Zhou
- School of Biotechnology and Health Science, Wuyi University, Jiangmen 529020, Guangdong, China
- Guangdong Provincial Key Laboratory of Large Animal Models for Biomedicine, Jiangmen 529020, Guangdong, China
| | - Yu Liu
- School of Biotechnology and Health Science, Wuyi University, Jiangmen 529020, Guangdong, China
| | - Chengcheng Tang
- School of Biotechnology and Health Science, Wuyi University, Jiangmen 529020, Guangdong, China
- Guangdong Provincial Key Laboratory of Large Animal Models for Biomedicine, Jiangmen 529020, Guangdong, China
| | - Lingyin Cheng
- School of Biotechnology and Health Science, Wuyi University, Jiangmen 529020, Guangdong, China
| | - Shuwen Zheng
- School of Biotechnology and Health Science, Wuyi University, Jiangmen 529020, Guangdong, China
| | - Yuling Zheng
- School of Biotechnology and Health Science, Wuyi University, Jiangmen 529020, Guangdong, China
| | - Min Chen
- School of Biotechnology and Health Science, Wuyi University, Jiangmen 529020, Guangdong, China
- Guangdong Provincial Key Laboratory of Large Animal Models for Biomedicine, Jiangmen 529020, Guangdong, China
| | - Huaqiang Yang
- College of Animal Science, South China Agricultural University, Guangzhou 510642, Guangdong, China
| | - Qingjian Zou
- School of Biotechnology and Health Science, Wuyi University, Jiangmen 529020, Guangdong, China
- Guangdong Provincial Key Laboratory of Large Animal Models for Biomedicine, Jiangmen 529020, Guangdong, China
| | - Liangxue Lai
- School of Biotechnology and Health Science, Wuyi University, Jiangmen 529020, Guangdong, China
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, Guangdong, China
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