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Yum SY, Choi BY, Gim GM, Eom KH, Lee SB, Kim D, Lim E, Kim DY, Heo SE, Shim D, Jang G. Long-term (10-year) monitoring of transposon-mediated transgenic cattle. Transgenic Res 2024:10.1007/s11248-024-00401-0. [PMID: 39196515 DOI: 10.1007/s11248-024-00401-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2024] [Accepted: 07/30/2024] [Indexed: 08/29/2024]
Abstract
The production of transgenic animals using non-viral methods has raised questions regarding their long-term health and genomic stability. In this study, we evaluated these aspects in transgenic cattle over ten years, using transposon-mediated gene transfer. Our longitudinal analysis included a comprehensive health assessment and whole-genome DNA resequencing. We found no significant alterations in physiological parameters or health complications in transposon-mediated transgenic cattle that exceeded 10 years of age. Genomic analysis revealed that the rates of somatic mutations and copy number variations in transgenic cattle were comparable to those in non-transgenic cattle. Furthermore, structural variants were infrequent, suggesting that transposon-mediated gene insertion did not compromise genomic integrity. These findings highlight the viability of transposon systems for generating transgenic livestock, potentially expanding their applications in agriculture and biotechnology. This study contributes significantly to our understanding of the long-term implications of transgenesis in large animals and supports the safety and stability of this method.
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Affiliation(s)
- Soo-Young Yum
- LARTBio Inc., Gwangmyeong-si, Gyeonggi-do, Republic of Korea
| | - Bae Young Choi
- Department of Biological Sciences, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon, Republic of Korea
| | - Gyeong-Min Gim
- LARTBio Inc., Gwangmyeong-si, Gyeonggi-do, Republic of Korea
| | - Kyeong-Hyeon Eom
- LARTBio Inc., Gwangmyeong-si, Gyeonggi-do, Republic of Korea
- Laboratory of Theriogenology and Biotechnology, Department of Veterinary Clinical Science, College of Veterinary Medicine and the Research Institute of Veterinary Science, Seoul National University, Gwanak-go, Gwanak-ru, Seoul, Republic of Korea
| | - Seong-Beom Lee
- LARTBio Inc., Gwangmyeong-si, Gyeonggi-do, Republic of Korea
| | - Daehyun Kim
- Department of Animal Science, Chonnam National University, Gwangju, Republic of Korea
| | - Euntaek Lim
- Theragen Bio Co., Ltd., Seongnam, Gyeonggi-do, Republic of Korea
| | - Do-Yoon Kim
- Gyeongsangbukdo Livestock Research Institute, Yeongju, Republic of Korea
| | - Seong-Eun Heo
- Gyeongsangbukdo Livestock Research Institute, Yeongju, Republic of Korea
| | - Donghwan Shim
- Department of Biological Sciences, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon, Republic of Korea.
- Center for Genome Engineering, Institute for Basic Science, Daejeon, Republic of Korea.
| | - Goo Jang
- LARTBio Inc., Gwangmyeong-si, Gyeonggi-do, Republic of Korea.
- Laboratory of Theriogenology and Biotechnology, Department of Veterinary Clinical Science, College of Veterinary Medicine and the Research Institute of Veterinary Science, Seoul National University, Gwanak-go, Gwanak-ru, Seoul, Republic of Korea.
- Comparative Medicine Disease Research Center, Seoul National University, Seoul, Republic of Korea.
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Jeon BJ, Kwon DH, Gim GM, Kim HK, Lee JH, Jang G. Stable long-term germline transmission of GFP transgenic rat via PiggyBac transposon mediated gene transfer. BMC Vet Res 2024; 20:275. [PMID: 38918814 PMCID: PMC11201299 DOI: 10.1186/s12917-024-04123-7] [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] [Received: 09/18/2023] [Accepted: 06/10/2024] [Indexed: 06/27/2024] Open
Abstract
Transgene silencing provides a significant challenge in animal model production via gene engineering using viral vectors or transposons. Selecting an appropriate strategy, contingent upon the species is crucial to circumvent transgene silencing, necessitating long-term observation of in vivo gene expression. This study employed the PiggyBac transposon to create a GFP rat model to address transgene silencing in rats. Surprisingly, transgene silencing occurred while using the CAG promoter, contrary to conventional understanding, whereas the Ef1α promoter prevented silencing. GFP expression remained stable through over five generations, confirming efficacy of the Ef1α promoter for long-term protein expression in rats. Additionally, GFP expression was consistently maintained at the cellular level in various cellular sources produced from the GFP rats, thereby validating the in vitro GFP expression of GFP rats. Whole-genome sequencing identified a stable integration site in Akap1 between exons 1 and 2, mitigating sequence-independent mechanism-mediated transgene silencing. This study established an efficient method for producing transgenic rat models using PiggyBac transposon. Our GFP rats represent the first model to exhibit prolonged expression of foreign genes over five generations, with implications for future research in gene-engineered rat models.
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Affiliation(s)
- Beom-Jin Jeon
- Laboratory of Theriogenology and Biotechnology, Department of Veterinary Clinical Science, College of Veterinary Medicine and the Research Institute of Veterinary Science, Seoul National University, 1 Gwanak-Ro, Gwanak-Gu, Seoul, 08826, Republic of Korea
- Comparative Medicine Disease Research Center, Seoul National University, Seoul, Republic of Korea
| | - Dong-Hyeok Kwon
- Laboratory of Theriogenology and Biotechnology, Department of Veterinary Clinical Science, College of Veterinary Medicine and the Research Institute of Veterinary Science, Seoul National University, 1 Gwanak-Ro, Gwanak-Gu, Seoul, 08826, Republic of Korea
- Comparative Medicine Disease Research Center, Seoul National University, Seoul, Republic of Korea
| | | | - Hee-Kyoung Kim
- Laboratory of Theriogenology and Biotechnology, Department of Veterinary Clinical Science, College of Veterinary Medicine and the Research Institute of Veterinary Science, Seoul National University, 1 Gwanak-Ro, Gwanak-Gu, Seoul, 08826, Republic of Korea
| | - Jeong-Hwa Lee
- Laboratory of Theriogenology and Biotechnology, Department of Veterinary Clinical Science, College of Veterinary Medicine and the Research Institute of Veterinary Science, Seoul National University, 1 Gwanak-Ro, Gwanak-Gu, Seoul, 08826, Republic of Korea
- K-BIO KIURI Center, Seoul National University, Seoul, Republic of Korea
| | - Goo Jang
- Laboratory of Theriogenology and Biotechnology, Department of Veterinary Clinical Science, College of Veterinary Medicine and the Research Institute of Veterinary Science, Seoul National University, 1 Gwanak-Ro, Gwanak-Gu, Seoul, 08826, Republic of Korea.
- LARTBio Incorp, Gyeonggi-Do, Republic of Korea.
- Comparative Medicine Disease Research Center, Seoul National University, Seoul, Republic of Korea.
- Faculty of Veterinary Medicine, Universitas Airlangga, Surabaya, Indonesia.
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Gim GM, Uhm KH, Kwon DH, Kim MJ, Jung DJ, Kim DH, Yi JK, Ha JJ, Yum SY, Son WJ, Lee JH, Park JH, Song KY, Lee WW, Jang G. Germline transmission of MSTN knockout cattle via CRISPR-Cas9. Theriogenology 2022; 192:22-27. [PMID: 36037573 DOI: 10.1016/j.theriogenology.2022.08.021] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 07/30/2022] [Accepted: 08/12/2022] [Indexed: 10/15/2022]
Abstract
Although the production of several founder animals (F0) for gene editing in livestock has been reported in cattle, very few studies have assessed germline transmission to the next generation due to the long sexual maturation and gestation periods. The present study aimed to assess the germline transmission of MSTN mutations (-12bps deletion) in MSTN mutant F0 male and female cattle. For this purpose, oocytes and semen were collected after the sexual maturation of MSTN cattle, and embryos produced by in vitro fertilization were analyzed. In addition, the embryos were subjected to additional gene (PRNP) editing using electroporation. Embryos produced by in vitro fertilization with MSTN male and female cattle were transferred to a surrogate, and one calf was successfully born. MSTN heterozygous mutation was shown by sequencing of the F1 calf, which had no health issues. As a further experiment, using electroporation, additional gene-edited embryos fertilized with the MSTN male sperm showed a high mutation rate of PRNP (86.2 ± 3.4%). These data demonstrate that the cattle produced through gene editing matured without health issues and had transmitted MSTN mutation from the germ cells. Also, additional mutation of embryos fertilized with the MSTN male sperm could enable further mutagenesis using electroporation.
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Affiliation(s)
- Gyeong-Min Gim
- Laboratory of Theriogenology and Biotechnology, Department of Veterinary Clinical Science, College of Veterinary Medicine and the Research Institute of Veterinary Science, Seoul National University, Seoul, Republic of Korea
| | - Kyeong-Hyun Uhm
- Laboratory of Theriogenology and Biotechnology, Department of Veterinary Clinical Science, College of Veterinary Medicine and the Research Institute of Veterinary Science, Seoul National University, Seoul, Republic of Korea
| | - Dong-Hyeok Kwon
- Laboratory of Theriogenology and Biotechnology, Department of Veterinary Clinical Science, College of Veterinary Medicine and the Research Institute of Veterinary Science, Seoul National University, Seoul, Republic of Korea
| | - Min-Ji Kim
- Laboratory of Theriogenology and Biotechnology, Department of Veterinary Clinical Science, College of Veterinary Medicine and the Research Institute of Veterinary Science, Seoul National University, Seoul, Republic of Korea
| | - Dae-Jin Jung
- Gyeongsangbukdo Livestock Research Institute, Yeongju, Republic of Korea
| | - Dae-Hyun Kim
- Gyeongsangbukdo Livestock Research Institute, Yeongju, Republic of Korea
| | - Jun-Koo Yi
- Gyeongsangbukdo Livestock Research Institute, Yeongju, Republic of Korea
| | - Jae-Jung Ha
- Gyeongsangbukdo Livestock Research Institute, Yeongju, Republic of Korea
| | | | | | | | | | | | | | - Goo Jang
- Laboratory of Theriogenology and Biotechnology, Department of Veterinary Clinical Science, College of Veterinary Medicine and the Research Institute of Veterinary Science, Seoul National University, Seoul, Republic of Korea; LARTBio Inco, Republic of Korea; Comparative medicine Disease Research Center, Seoul National University, Republic of Korea.
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Kwon DH, Gim GM, Eom KH, Lee JH, Jang G. Application of transposon systems in the transgenesis of bovine somatic and germ cells. BMC Vet Res 2022; 18:156. [PMID: 35477562 PMCID: PMC9044889 DOI: 10.1186/s12917-022-03252-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Accepted: 04/14/2022] [Indexed: 12/12/2022] Open
Abstract
Background Several DNA transposons including PiggyBac (PB), Sleeping Beauty (SB), and Tol2 have been applied as effective means for of transgenesis in many species. Cattle are not typically experimental animals, and relatively little verification has been presented on this species. Thus, the goal here was to determine the applicability of three transposon systems in somatic and embryo cells in cattle, while also investigating which of the three systems is appropriate for each cell type. Green fluorescent protein (GFP)-expressing transposon systems were used for electroporation and microinjection in the somatic cells and embryo stage, respectively. After transfection, the GFP-positive cells or blastocysts were observed through fluorescence, while the transfection efficiency was calculated by FACS. Results In bovine somatic cells, the PB (63.97 ± 11.56) showed the highest efficiency of the three systems (SB: 50.74 ± 13.02 and Tol2: 16.55 ± 5.96). Conversely, Tol2 (75.00%) and SB (70.00%) presented a higher tendency in the embryonic cells compared to PB (42.86%). Conclusions These results demonstrate that these three transposon systems can be used in bovine somatic cells and embryos as gene engineering experimental methods. Moreover, they demonstrate which type of transposon system to apply depending on the cell type. Supplementary Information The online version contains supplementary material available at 10.1186/s12917-022-03252-1.
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Affiliation(s)
- Dong-Hyeok Kwon
- Laboratory of Theriogenology, College of Veterinary Medicine, Seoul National University, Gwanak-ro, Gwanak-gu, Seoul, Republic of Korea, 08826.,BK21 PLUS program, College of Veterinary Medicine, Seoul National University, Seoul, 08826, Republic of Korea
| | - Gyeong-Min Gim
- Laboratory of Theriogenology, College of Veterinary Medicine, Seoul National University, Gwanak-ro, Gwanak-gu, Seoul, Republic of Korea, 08826.,BK21 PLUS program, College of Veterinary Medicine, Seoul National University, Seoul, 08826, Republic of Korea
| | - Kyeong-Hyeon Eom
- Laboratory of Theriogenology, College of Veterinary Medicine, Seoul National University, Gwanak-ro, Gwanak-gu, Seoul, Republic of Korea, 08826.,BK21 PLUS program, College of Veterinary Medicine, Seoul National University, Seoul, 08826, Republic of Korea
| | | | - Goo Jang
- Laboratory of Theriogenology, College of Veterinary Medicine, Seoul National University, Gwanak-ro, Gwanak-gu, Seoul, Republic of Korea, 08826. .,BK21 PLUS program, College of Veterinary Medicine, Seoul National University, Seoul, 08826, Republic of Korea. .,LARTBio Inc, Seoul, Republic of Korea.
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Monzani PS, Adona PR, Long SA, Wheeler MB. Cows as Bioreactors for the Production of Nutritionally and Biomedically Significant Proteins. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2021; 1354:299-314. [PMID: 34807448 DOI: 10.1007/978-3-030-85686-1_15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Dairy and beef cattle make a vital contribution to global nutrition, and since their domestication, they have been continuously exposed to natural and artificial selection to improve production characteristics. The technologies of transgenesis and gene editing used in cattle are responsible for generating news characteristics in bovine breeding, such as alteration of nutritional components of milk and meat enhancing human health benefits, disease resistance decreasing production costs and offering safe products for human food, as well as the recombinant protein production of biomedical significance. Different methodologies have been used to generate transgenic cattle as bioreactors. These methods include the microinjection of vectors in pronuclear, oocyte or zygote, sperm-mediate transgenesis, and somatic cell nuclear transfer. Gene editing has been applied to eliminate unwanted genes related to human and animal health, such as allergy, infection, or disease, and to insert transgenes into specific sites in the host genome. Methodologies for the generation of genetically modified cattle are laborious and not very efficient. However, in the last 30 years, transgenic animals were produced using many biotechnological tools. The result of these modifications includes (1) the change of nutritional components, including proteins, amino acids and lipids for human nutrition; (2) the removal allergic proteins milk; (3) the production of cows resistant to disease; or (4) the production of essential proteins used in biomedicine (biomedical proteins) in milk and blood plasma. The genetic modification of cattle is a powerful tool for biotechnology. It allows for the generation of new or modified products and functionality that are not currently available in this species.
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Affiliation(s)
- P S Monzani
- Instituto Chico Mendes de Conservação da Biodiversidade/Centro Nacional de Pesquisa e Conservação da Biodiversidade Aquática Continental, Pirassununga, SP, Brasil.
| | - P R Adona
- Saúde e Produção de Ruminantes, Universidade Norte do Paraná, Arapongas, PR, Brasil
| | - S A Long
- Departments of Animal Sciences and Bioengineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - M B Wheeler
- Departments of Animal Sciences and Bioengineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA.,Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, USA
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Gim GM, Kwon DH, Lee WW, Jung DJ, Kim DH, Yi JK, Jang G. Transgenic F2 bovine embryos show stable germline transmission and maintenance of transgene expression through two generations. Biol Reprod 2020; 103:1148-1151. [PMID: 32915208 DOI: 10.1093/biolre/ioaa165] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 08/03/2020] [Accepted: 09/09/2020] [Indexed: 12/13/2022] Open
Affiliation(s)
- Gyeong-Min Gim
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine and the Research Institute of Veterinary Science, Seoul National University, Seoul, Republic of Korea.,BK21 Plus program, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
| | - Dong-Hyeok Kwon
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine and the Research Institute of Veterinary Science, Seoul National University, Seoul, Republic of Korea.,BK21 Plus program, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
| | | | - Dae-Jin Jung
- Gyeongsangbukdo Livestock Research Institute, Yeongju, GyeongSang Buk-Do, Republic of Korea
| | - Dae-Hyun Kim
- Gyeongsangbukdo Livestock Research Institute, Yeongju, GyeongSang Buk-Do, Republic of Korea.,Department of Biotechnology, College of Agriculture & Life Science, Hankyong National University, Anseong, Gyeonggi, Republic of Korea
| | - Jun-Koo Yi
- Gyeongsangbukdo Livestock Research Institute, Yeongju, GyeongSang Buk-Do, Republic of Korea
| | - Goo Jang
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine and the Research Institute of Veterinary Science, Seoul National University, Seoul, Republic of Korea.,BK21 Plus program, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea.,LARTBio Inc., Seoul, Republic of Korea
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piggyBac-Based Non-Viral In Vivo Gene Delivery Useful for Production of Genetically Modified Animals and Organs. Pharmaceutics 2020; 12:pharmaceutics12030277. [PMID: 32204422 PMCID: PMC7151002 DOI: 10.3390/pharmaceutics12030277] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Revised: 03/17/2020] [Accepted: 03/18/2020] [Indexed: 11/17/2022] Open
Abstract
In vivo gene delivery involves direct injection of nucleic acids (NAs) into tissues, organs, or tail-veins. It has been recognized as a useful tool for evaluating the function of a gene of interest (GOI), creating models for human disease and basic research targeting gene therapy. Cargo frequently used for gene delivery are largely divided into viral and non-viral vectors. Viral vectors have strong infectious activity and do not require the use of instruments or reagents helpful for gene delivery but bear immunological and tumorigenic problems. In contrast, non-viral vectors strictly require instruments (i.e., electroporator) or reagents (i.e., liposomes) for enhanced uptake of NAs by cells and are often accompanied by weak transfection activity, with less immunological and tumorigenic problems. Chromosomal integration of GOI-bearing transgenes would be ideal for achieving long-term expression of GOI. piggyBac (PB), one of three transposons (PB, Sleeping Beauty (SB), and Tol2) found thus far, has been used for efficient transfection of GOI in various mammalian cells in vitro and in vivo. In this review, we outline recent achievements of PB-based production of genetically modified animals and organs and will provide some experimental concepts using this system.
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Lipták N, Bősze Z, Hiripi L. GFP transgenic animals in biomedical research: a review of potential disadvantages. Physiol Res 2019; 68:525-530. [PMID: 31342754 DOI: 10.33549/physiolres.934227] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Green Fluorescent protein (GFP) transgenic animals are accepted tools for studying various physiological processes, including organ development and cell migration. However, several in vivo studies claimed that GFP may impair transgenic animals' health. Glomerulosclerosis was observed in transgenic mice and rabbits with ubiquitous reporter protein expression. Heart-specific GFP expression evoked dilated cardiomyopathy and altered cardiac function in transgenic mouse and zebrafish lines, respectively. Moreover, growth retardation and increased axon swelling were observed in GFP and yellow fluorescent protein (YFP) transgenic mice, respectively. This review will focus on the potential drawbacks of the applications of GFP transgenic animals in biomedical research.
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Affiliation(s)
- N Lipták
- NARIC-Agricultural Biotechnology Institute, Animal Biotechnology Department, Gödöllő, Hungary.
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