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Taweechaipaisankul A, Kim GA, Jin JX, Yeom SC, Lee BC. Establishment and identification of cell lines from type O blood Korean native pigs and their efficiency in supporting embryonic development via somatic cell nuclear transfer. J Vet Sci 2018; 19:492-499. [PMID: 29486531 PMCID: PMC6070591 DOI: 10.4142/jvs.2018.19.4.492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Revised: 07/28/2017] [Accepted: 02/02/2018] [Indexed: 11/20/2022] Open
Abstract
Due to their similarities with humans in anatomy, physiology, and genetics miniature pigs are becoming an attractive model for biomedical research. We aim to establish and evaluate blood type O cells derived from Korean native pig (KNP), a typical miniature pig breed in Korea. Ten cell lines derived from 8 KNP piglets and one adult female KNP (kidney and ear tissues) were established. To confirm the presence of blood type O, genomic DNA, fucosyltransferase (FUT) expression, and immunofluorescence staining were examined. Additionally, fluorescence-activated cell sorting and somatic cell nuclear transfer were performed to investigate the normality of the cell lines and to evaluate their effectiveness in embryo development. We found no significant bands corresponding to specific blood group A, and no increase in FUT expression in cell lines derived from piglets No. 1, No. 4, No. 5, No. 8, and the adult female KNP; moreover, they showed normal levels of expression of α 1,3-galactosyltransferase and cytidine monophosphate-N-acetylneuraminic acid hydroxylase. There was no significant difference in embryo development between skin and kidney fibroblasts derived from the blood type O KNPs. In conclusion, we successfully established blood type O KNP cell lines, which may serve as a useful model in xenotransplantation research.
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Affiliation(s)
- Anukul Taweechaipaisankul
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Seoul 08826, Korea
| | - Geon A Kim
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Seoul 08826, Korea
| | - Jun-Xue Jin
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Seoul 08826, Korea
| | - Su Cheong Yeom
- Institutes of Green Bio Science and Technology, Seoul National University, Pyeongchang 25354, Korea
| | - Byeong Chun Lee
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Seoul 08826, Korea.,Institutes of Green Bio Science and Technology, Seoul National University, Pyeongchang 25354, Korea
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Ju H, Zhang J, Bai L, Mu Y, Du Y, Yang W, Li Y, Sheng A, Li K. The transgenic cloned pig population with integrated and controllable GH expression that has higher feed efficiency and meat production. Sci Rep 2015; 5:10152. [PMID: 25959098 PMCID: PMC5386205 DOI: 10.1038/srep10152] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2014] [Accepted: 04/01/2015] [Indexed: 01/02/2023] Open
Abstract
Sustained expression of the GH gene has been shown to have detrimental effects on the health of animals. In the current study, transgenic founder pigs, with controllable pig growth hormone (pGH) expression, were cloned via the handmade cloning method (HMC), and pGH expression levels were examined at the cellular and organismal levels. The serum pGH levels in 3 founder male pigs were found to be significantly higher after induction with intramuscular injection of doxycycline (DOX) compared to baseline. A daily dose of DOX was administered via feed to these animals for a period of 65 to 155 days. The growth rate, feed efficiency and pGH serum concentration increased in the DOX-induced transgenic group compared with the other groups. 8 numbers of animals were euthanized and the dressing percentage, loin muscle and lean meat percentage were significantly higher in the DOX-induced F1 transgenic group compared with the other groups. In this study a large population of transgenic pigs, with integrated controllable expression of a transgene, was obtained. The transgenic pigs were healthy and normal in terms of reproductive capability. At the same time, feed efficiency was improved, production processes were accelerated and meat yield was increased.
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Affiliation(s)
- Huiming Ju
- 1] Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation of Ministry of Agriculture, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, P. R. China [2] College of Veterinary Medicine, Yangzhou University, Yangzhou 25009, Jiangsu, P. R. China
| | - Jiaqing Zhang
- 1] Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation of Ministry of Agriculture, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, P. R. China [2] Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, 210095, P. R. China
| | - Lijing Bai
- Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation of Ministry of Agriculture, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, P. R. China
| | - Yulian Mu
- Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation of Ministry of Agriculture, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, P. R. China
| | - Yutao Du
- BGI-Shenzhen, Bei Shan Road, Yantian, Shenzhen, 518083, P. R. China
| | - Wenxian Yang
- BGI-Shenzhen, Bei Shan Road, Yantian, Shenzhen, 518083, P. R. China
| | - Yong Li
- BGI-Shenzhen, Bei Shan Road, Yantian, Shenzhen, 518083, P. R. China
| | - Anzhi Sheng
- College of Veterinary Medicine, Yangzhou University, Yangzhou 25009, Jiangsu, P. R. China
| | - Kui Li
- Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation of Ministry of Agriculture, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, P. R. China
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Feng X, Cao S, Wang H, Meng C, Li J, Jiang J, Qian Y, Su L, He Q, Zhang Q. Production of transgenic dairy goat expressing human α-lactalbumin by somatic cell nuclear transfer. Transgenic Res 2014; 24:73-85. [PMID: 25139669 DOI: 10.1007/s11248-014-9818-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2013] [Accepted: 07/17/2014] [Indexed: 11/30/2022]
Abstract
Production of human α-lactalbumin (hα-LA) transgenic cloned dairy goats has great potential in improving the nutritional value and perhaps increasing the yield of dairy goat milk. Here, a mammary-specific expression vector 5A, harboring goat β-lactoglobulin (βLG) promoter, the hα-LA gene, neo(r) and EGFP dual markers, was constructed. Then, it was effectively transfected into goat mammary epithelial cells (GMECs) and the expression of hα-LA was investigated. Both the hα-LA transcript and protein were detected in the transfected GMECs after the induction of hormonal signals. In addition, the 5A vector was introduced into dairy goat fetal fibroblasts (transfection efficiency ≈60-70%) to prepare competent transgenic donor cells. A total of 121 transgenic fibroblast clones were isolated by 96-well cell culture plates and screened with nested-PCR amplification and EGFP fluorescence. After being frozen for 8 months, the transgenic cells still showed high viabilities, verifying their ability as donor cells. Dairy goat cloned embryos were produced from these hα-LA transgenic donor cells by somatic cell nuclear transfer (SCNT), and the rates of fusion, cleavage, and the development to blastocyst stages were 81.8, 84.4, and 20.0%, respectively. A total of 726 reconstructed embryos derived from the transgenic cells were transferred to 74 recipients and pregnancy was confirmed at 90 days in 12 goats. Of six female kids born, two carried hα-LA and the hα-LA protein was detected in their milk. This study provides an effective system to prepare SCNT donor cells and transgenic animals for human recombinant proteins.
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Affiliation(s)
- Xiujing Feng
- Institute of Animal Science, Jiangsu Academy of Agricultural Sciences, Nanjing, Jiangsu, 210014, China
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Liu H, Lv P, Zhu X, Wang X, Yang X, Zuo E, Lu Y, Lu S, Lu K. In vitro development of porcine transgenic nuclear-transferred embryos derived from newborn Guangxi Bama mini-pig kidney fibroblasts. In Vitro Cell Dev Biol Anim 2014; 50:811-21. [PMID: 24879084 DOI: 10.1007/s11626-014-9776-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2014] [Accepted: 04/29/2014] [Indexed: 12/18/2022]
Abstract
Porcine transgenic cloning has potential applications for improving production traits and for biomedical research purposes. To produce a transgenic clone, kidney fibroblasts from a newborn Guangxi Bama mini-pig were isolated, cultured, and then transfected with red and green fluorescent protein genes using lipofectamine for nuclear transfer. The results of the present study show that the kidney fibroblasts exhibited excellent proliferative capacity and clone-like morphology, and were adequate for generation of somatic cell nuclear transfer (SCNT)-derived embryos, which was confirmed by their cleavage activity and blastocyst formation rate of 70.3% and 7.9%, respectively. Cells transfected with red fluorescent protein genes could be passed more than 35 times. Transgenic embryos cloned with fluorescent or blind enucleation methods were not significantly different with respect to cleavage rates (92.5% vs. 86.8%, p > 0.05) and blastocyst-morula rates (26.9% vs. 34.0%, p > 0.05), but were significantly different with respect to blastocyst rates (3.0% vs. 13.2%, p < 0.05). Cleavage (75.3%, 78.5% vs. 78.0%, p > 0.05), blastocyst (14.1%, 16.1% vs. 23.1%, p > 0.05) and morula/blastocyst rates (43.5%, 47.0% vs. 57.6%, p > 0.05) were not significantly different between the groups of transgenic cloned embryos, cloned embryos, and parthenogenetic embryos. This indicates that long-time screening by G418 caused no significant damage to kidney fibroblasts. Thus, kidney fibroblasts represent a promising new source for transgenic SCNT, and this work lays the foundation for the production of genetically transformed cloned Guangxi Bama mini-pigs.
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Affiliation(s)
- Hongbo Liu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, and College of Animal Science and Technology, Guangxi University, 100 Daxuedong Road, Nanning, 530004, China
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Khodarovich YM, Goldman IL, Sadchikova ER, Georgiev PG. Expression of eukaryotic recombinant proteins and deriving them from the milk of transgenic animals. APPL BIOCHEM MICRO+ 2013. [DOI: 10.1134/s0003683813090020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Bang JI, Yoo JG, Park MR, Shin TS, Cho BW, Lee HG, Kim BW, Kang TY, Kong IK, Kim JH, Cho SK. The effects of artificial activation timing on the development of SCNT-derived embryos and newborn piglets. Reprod Biol 2013; 13:127-32. [PMID: 23719117 DOI: 10.1016/j.repbio.2013.01.181] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2012] [Accepted: 09/17/2012] [Indexed: 11/16/2022]
Abstract
This study investigated the effects of two different activation regimens on the developmental potential of somatic cell nuclear transfer (SCNT) embryos and postnatal survivability of the cloned piglets. In vitro matured oocytes were enucleated and reconstructed with porcine fetal fibroblasts. On the basis of the activation regimen used, the reconstructed porcine embryos were allocated into two groups: Group 1-simultaneous electrical pulses and activation group (SFA group); and Group 2-electrical fusion without calcium followed by electrical pulses with calcium after colcemid and cytochalasin B treatment for 5h (DA group). Embryonic development in both SFA and DA groups was determined at day 6 of culture in NSCU-23 medium. To investigate the post-implantation development after the two activation methods, embryos were cultured for 1 day and then transferred into the oviducts of estrus-synchronized recipients. DA group had significantly (p<0.05) higher cleavage rates than SFA group. However, the developmental rate to the blastocyst stage and the mean cell number of blastocysts did not differ (p>0.05) between SFA and DA groups. Moreover, the pregnancy rate of SFA group was not significantly different compared to DA group. A total of 20 cloned piglets (SFA group-8 live piglets, DA group-11 live piglets and one stillborn) were obtained in the present study. The birth weight of the cloned piglets (live births) did not differ (p>0.05) between the two groups. Furthermore, no difference was observed in the postnatal survival rates of the cloned piglets obtained using two different activation regimens. These results suggest that the timing of artificial activation and additional chemical treatments do not affect the developmental rate of porcine SCNT embryos. Remarkably, the pregnancy rate and postnatal survivability of the cloned piglets did not vary between SFA and DA groups.
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Affiliation(s)
- Jae-Il Bang
- Department of Animal Science, Division of Applied Life Science, Graduate School of Gyeongsang National University, Jinju, Gyeongnam, Republic of Korea
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Developmental potential of pig embryos reconstructed by use of sow versus pre-pubertal gilt oocytes after somatic cell nuclear transfer. ZYGOTE 2013; 22:356-65. [DOI: 10.1017/s0967199412000676] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
SummaryIn this study, the developmental ability of cloned embryos using gilt versus sow oocytes was evaluated under the hypothesis that the efficiency of nuclear transfer using gilt oocytes was lower than that of sow oocytes, but that it could be optimized. Five experiments were performed with routine production of cloned embryos with sow oocytes serving as the control. Results showed that: Experiment 1: Blastocyst rates of cloned embryos with gilt oocytes was about half compared with control. Experiment 2: An extended maturation time of 48 h used for gilt oocytes resulted in lower blastocyst rates after cloning. Experiment 3: Development of cloned embryos with gilt oocytes was improved by co-culture with sow oocytes. Experiment 4: After maturation of gilt oocytes using follicular fluid from gilt instead of sow, the oocytes were sorted into large and small oocytes, and after cloning, blastocyst rates were higher using large gilt oocytes compared with small oocytes; however, the rate remained lower compared with control. Experiment 5: Six sow recipients received a total of 503 morulae and blastocysts cloned from gilt oocytes (four recipients) and 190 cloned from sow oocytes (two recipients). All recipients became pregnant and went to term, resulting in 26 (gilt oocytes) and six (sow oocytes) piglets. In conclusion, results confirmed that nuclear transfer efficiency was higher using sow versus gilt oocytes, but the use of gilt oocytes can be optimized by sorting after ooplasm size following maturation and by maturing gilt and sow oocytes together.
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Production of myostatin-targeted goat by nuclear transfer from cultured adult somatic cells. Theriogenology 2013; 79:225-33. [DOI: 10.1016/j.theriogenology.2012.08.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2012] [Revised: 08/13/2012] [Accepted: 08/13/2012] [Indexed: 11/17/2022]
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Garrels W, Ivics Z, Kues WA. Precision genetic engineering in large mammals. Trends Biotechnol 2012; 30:386-93. [DOI: 10.1016/j.tibtech.2012.03.008] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2012] [Revised: 03/19/2012] [Accepted: 03/22/2012] [Indexed: 12/19/2022]
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Tan WS, Carlson DF, Walton MW, Fahrenkrug SC, Hackett PB. Precision editing of large animal genomes. ADVANCES IN GENETICS 2012; 80:37-97. [PMID: 23084873 PMCID: PMC3683964 DOI: 10.1016/b978-0-12-404742-6.00002-8] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Transgenic animals are an important source of protein and nutrition for most humans and will play key roles in satisfying the increasing demand for food in an ever-increasing world population. The past decade has experienced a revolution in the development of methods that permit the introduction of specific alterations to complex genomes. This precision will enhance genome-based improvement of farm animals for food production. Precision genetics also will enhance the development of therapeutic biomaterials and models of human disease as resources for the development of advanced patient therapies.
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Affiliation(s)
- Wenfang Spring Tan
- Center for Genome Engineering, University of Minnesota, Minneapolis, MN, USA
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Ju S, Rui R. Effects of cumulus cells on in vitro maturation of oocytes and development of cloned embryos in the pig. Reprod Domest Anim 2011; 47:521-9. [PMID: 22017764 DOI: 10.1111/j.1439-0531.2011.01912.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The purpose of this study was to investigate the role of porcine cumulus cells (CC) in oocyte maturation and somatic cell nuclear transfer (SCNT) embryo development in vitro. Denuded pig oocytes were co-cultured with CC or routinely cultured in maturation medium without a feeder layer. Porcine CC inactivated with mitomycin C or non-inactivated were used for the feeder layer in co-culture with porcine SCNT embryos to investigate comparatively the developmental competence of cloned embryos. The DNA damage aspects of apoptosis and expression pattern of genes implicated in apoptosis (Fas/FasL) as well as the mRNA expression of DNA methyltransferase (Dnmt1, Dnmt3a) of porcine SCNT embryos were also evaluated by comet assay or real-time RT-PCR, respectively. The results showed that co-culture with CC improved the extrusion rate of pbI (49.3% vs 31.5%, p<0.05) and survival rate (75.7% vs 53.3%, p<0.05) of denuded oocytes, but had no effects on blastocyst developmental rate or 2-cell-stage survival rate of in vitro fertilization embryos. Co-culture with CC inactivated by mitomycin C improved the blastocyst developmental rate (26.6% vs 13.0%, p<0.05) and decreased the apoptotic incidence (27.6% vs 46.2%, p<0.05) of porcine cloned embryos. Co-culture with inactivated CC reduced Fas and FasL mRNA expression of cloned embryos at the blastocyst stage compared with NT controls (p<0.05), but there were no differences in Dnmt1 and Dnmt3a mRNA expression among groups. Co-culture with inactivated cumulus cell monolayer significantly increased blastocyst formation and decreased the apoptotic incidence in porcine cloned embryos during in vitro development.
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Affiliation(s)
- S Ju
- College of Veterinary Medicine, Nanjing Agricultural University, Jiangsu, China
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Garrels W, Mátés L, Holler S, Dalda A, Taylor U, Petersen B, Niemann H, Izsvák Z, Ivics Z, Kues WA. Germline transgenic pigs by Sleeping Beauty transposition in porcine zygotes and targeted integration in the pig genome. PLoS One 2011; 6:e23573. [PMID: 21897845 PMCID: PMC3163581 DOI: 10.1371/journal.pone.0023573] [Citation(s) in RCA: 99] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2011] [Accepted: 07/20/2011] [Indexed: 12/21/2022] Open
Abstract
Genetic engineering can expand the utility of pigs for modeling human diseases, and for developing advanced therapeutic approaches. However, the inefficient production of transgenic pigs represents a technological bottleneck. Here, we assessed the hyperactive Sleeping Beauty (SB100X) transposon system for enzyme-catalyzed transgene integration into the embryonic porcine genome. The components of the transposon vector system were microinjected as circular plasmids into the cytoplasm of porcine zygotes, resulting in high frequencies of transgenic fetuses and piglets. The transgenic animals showed normal development and persistent reporter gene expression for >12 months. Molecular hallmarks of transposition were confirmed by analysis of 25 genomic insertion sites. We demonstrate germ-line transmission, segregation of individual transposons, and continued, copy number-dependent transgene expression in F1-offspring. In addition, we demonstrate target-selected gene insertion into transposon-tagged genomic loci by Cre-loxP-based cassette exchange in somatic cells followed by nuclear transfer. Transposase-catalyzed transgenesis in a large mammalian species expands the arsenal of transgenic technologies for use in domestic animals and will facilitate the development of large animal models for human diseases.
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Affiliation(s)
- Wiebke Garrels
- Institut für Nutztiergenetik, Friedrich-Loeffler-Institut, Neustadt, Germany
| | - Lajos Mátés
- Max Delbrück Center for Molecular Medicine, Berlin, Germany
| | - Stephanie Holler
- Institut für Nutztiergenetik, Friedrich-Loeffler-Institut, Neustadt, Germany
| | - Anna Dalda
- Max Delbrück Center for Molecular Medicine, Berlin, Germany
| | - Ulrike Taylor
- Institut für Nutztiergenetik, Friedrich-Loeffler-Institut, Neustadt, Germany
| | - Björn Petersen
- Institut für Nutztiergenetik, Friedrich-Loeffler-Institut, Neustadt, Germany
| | - Heiner Niemann
- Institut für Nutztiergenetik, Friedrich-Loeffler-Institut, Neustadt, Germany
| | - Zsuzsanna Izsvák
- Max Delbrück Center for Molecular Medicine, Berlin, Germany
- University of Debrecen, Debrecen, Hungary
| | - Zoltán Ivics
- Max Delbrück Center for Molecular Medicine, Berlin, Germany
- University of Debrecen, Debrecen, Hungary
- * E-mail: (WAK); (ZI)
| | - Wilfried A. Kues
- Institut für Nutztiergenetik, Friedrich-Loeffler-Institut, Neustadt, Germany
- * E-mail: (WAK); (ZI)
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Piedrahita JA, Olby N. Perspectives on transgenic livestock in agriculture and biomedicine: an update. Reprod Fertil Dev 2011; 23:56-63. [PMID: 21366981 DOI: 10.1071/rd10246] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
It has been 30 years since the first transgenic mouse was generated and 26 years since the first example of transferring the technology to livestock was published. While there was tremendous optimism in those initial years, with most convinced that genetically modified animals would play a significant role in agricultural production, that has not come to be. So at first sight one could conclude that this technology has, to a large extent, failed. On the contrary, it is believed that it has succeeded beyond our original expectations, and we are now at what is perhaps the most exciting time in the development and implementation of these technologies. The original goals, however, have drastically changed and it is now biomedical applications that are playing a central role in pushing both technical and scientific developments. The combination of advances in somatic cell nuclear transfer, the development of induced pluripotent stem cells and the completion of the sequencing of most livestock genomes ensures a bright and exciting future for this field, not only in livestock but also in companion animal species.
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Affiliation(s)
- Jorge A Piedrahita
- Department of Molecular Biomedical Sciences, North Carolina State University, Raleigh, NC 27606, USA.
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Park JY, Park MR, Hwang KC, Chung JS, Bui HT, Kim T, Cho SK, Kim JH, Hwang S, Park SB, Nguyen VT, Kim JH. Comparative Gene Expression Analysis of Somatic Cell Nuclear Transfer-Derived Cloned Pigs with Normal and Abnormal Umbilical Cords1. Biol Reprod 2011; 84:189-99. [DOI: 10.1095/biolreprod.110.085779] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
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Zhang YL, Wan YJ, Wang ZY, Xu D, Pang XS, Meng L, Wang LH, Zhong BS, Wang F. Production of dairy goat embryos, by nuclear transfer, transgenic for human acid beta-glucosidase. Theriogenology 2010; 73:681-90. [PMID: 20053430 DOI: 10.1016/j.theriogenology.2009.11.008] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2009] [Revised: 11/07/2009] [Accepted: 11/08/2009] [Indexed: 11/24/2022]
Abstract
Expression of recombinant human lysosomal acid beta-glucosidase (hGCase) by a transgenic animal bioreactor, using somatic cell nuclear transfer (SCNT), would decrease the cost of producing this product. The objective was to establish an effective procedure to prepare hGCase transgenic donor cells and nuclear transfer (NT) embryos to produce hGCase protein in the Saanen dairy goat mammary gland. A mammary-specific expression vector for hGCase was constructed and transfected into HC-11 mammary epithelial cells for bioactivity analysis in vitro; mRNA transcripts and hGCase protein were correctly expressed in transfected HC-11 cells. The hGCase gene was then introduced into fetal fibroblasts (from dairy goats) to prepare competent transgenic donor cells. Transgenic fibroblast clones from a single round of transfection were reliably isolated by 96-well cell culture plates and screened with PCR amplification and chromosomal counting (66.8%). Dairy goat cloned embryos were produced from these hGCase fetal cells by SCNT, the hGCase transgene was successfully detected in these embryos, and there were similar rates (P>0.05) of fusion (83.3% vs. 77.8%), cleavage (89.1% vs. 90.9%), and development to the morula/blastocyst stages (36.4% vs. 38.9%) between NT embryos using transgenic fetal fibroblasts and non-transfected control cells. Moreover, 98 well-developed reconstructed embryos derived from transgenic cells were transferred to 16 recipients; pregnancy was confirmed at 40 d in two goats. Therefore, we achieved functional expression of hGCase in mammary gland cells and normal development to Day 40 of cloned embryos carrying the hGCase gene.
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Affiliation(s)
- Y L Zhang
- Center of Embryo Engineering and Technology, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
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