1
|
Abstract
This chapter highlights the importance of reproductive technologies that are applied to porcine breeds. Nowadays the porcine industry, part of a high technological and specialized sector, offers high-quality protein food. The development of the swine industry is founded in the development of breeding/genetics, nutrition, animal husbandry, and animal health. The implementation of reproductive technologies in swine has conducted to levels of productivity never reached before. In addition, the pig is becoming an important species for biomedicine. The generation of pig models for human disease, xenotransplantation, or production of therapeutic proteins for human medicine has in fact generated a growing field of interest.
Collapse
|
2
|
Sake HJ, Frenzel A, Lucas-Hahn A, Nowak-Imialek M, Hassel P, Hadeler KG, Hermann D, Becker R, Eylers H, Hein R, Baars W, Brinkmann A, Schwinzer R, Niemann H, Petersen B. Possible detrimental effects of beta-2-microglobulin knockout in pigs. Xenotransplantation 2019; 26:e12525. [PMID: 31119817 DOI: 10.1111/xen.12525] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Revised: 04/16/2019] [Accepted: 04/18/2019] [Indexed: 12/21/2022]
Abstract
BACKGROUND Despite major improvements in pig-to-primate xenotransplantation, long-term survival of xenografts is still challenging. The major histocompatibility complex (MHC) class I, which is crucial in cellular immune response, is an important xenoantigen. Abrogating MHC class I expression on xenografts might be beneficial for extending graft survival beyond current limits. METHODS In this study, we employed the CRISPR/Cas9 system to target exon 2 of the porcine beta-2-microglobulin (B2M) gene to abrogate SLA class I expression on porcine cells. B2M-KO cells served as donor cells for somatic cell nuclear transfer, and cloned embryos were transferred to three recipient sows. The offspring were genotyped for mutations at the B2M locus, and blood samples were analyzed via flow cytometry for the absence of SLA class I molecules. RESULTS Pregnancies were successfully established and led to the birth of seven viable piglets. Genomic sequencing proved that all piglets carried biallelic modifications at the B2M locus leading to a frameshift, a premature stop codon, and ultimately a functional knockout. However, survival times of these animals did not exceed 4 weeks due to unexpected disease processes. CONCLUSION Here, we demonstrate the feasibility of generating SLA class I knockout pigs by targeting the porcine beta-2-microglobulin gene using the CRISPR/Cas9 system. Additionally, our findings indicate for the first time that this genetic modification might have a negative impact on the viability of the animals. These issues need to be solved to unveil the real value for xenotransplantation in the future.
Collapse
Affiliation(s)
| | - Antje Frenzel
- Institute of Farm Animal Genetics, Friedrich-Loeffler-Institut, Neustadt, Germany
| | - Andrea Lucas-Hahn
- Institute of Farm Animal Genetics, Friedrich-Loeffler-Institut, Neustadt, Germany
| | - Monika Nowak-Imialek
- Institute of Farm Animal Genetics, Friedrich-Loeffler-Institut, Neustadt, Germany
| | - Petra Hassel
- Institute of Farm Animal Genetics, Friedrich-Loeffler-Institut, Neustadt, Germany
| | - Klaus-Gerd Hadeler
- Institute of Farm Animal Genetics, Friedrich-Loeffler-Institut, Neustadt, Germany
| | - Doris Hermann
- Institute of Farm Animal Genetics, Friedrich-Loeffler-Institut, Neustadt, Germany
| | - Roswitha Becker
- Institute of Farm Animal Genetics, Friedrich-Loeffler-Institut, Neustadt, Germany
| | - Heinke Eylers
- Institute of Farm Animal Genetics, Friedrich-Loeffler-Institut, Neustadt, Germany
| | - Rabea Hein
- Transplant Laboratory, Department of General, Visceral and Transplantation Surgery, Hannover Medical School, Hannover, Germany
| | - Wiebke Baars
- Transplant Laboratory, Department of General, Visceral and Transplantation Surgery, Hannover Medical School, Hannover, Germany
| | - Antje Brinkmann
- Transplant Laboratory, Department of General, Visceral and Transplantation Surgery, Hannover Medical School, Hannover, Germany
| | - Reinhard Schwinzer
- Transplant Laboratory, Department of General, Visceral and Transplantation Surgery, Hannover Medical School, Hannover, Germany
| | - Heiner Niemann
- REBIRTH/Department of Gastroenterology, Hannover Medical School, Hannover, Germany
| | - Björn Petersen
- Institute of Farm Animal Genetics, Friedrich-Loeffler-Institut, Neustadt, Germany
| |
Collapse
|
3
|
The production of multi-transgenic pigs: update and perspectives for xenotransplantation. Transgenic Res 2016; 25:361-74. [PMID: 26820415 DOI: 10.1007/s11248-016-9934-8] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Accepted: 01/06/2016] [Indexed: 12/11/2022]
Abstract
The domestic pig shares many genetic, anatomical and physiological similarities to humans and is thus considered to be a suitable organ donor for xenotransplantation. However, prior to clinical application of porcine xenografts, three major hurdles have to be overcome: (1) various immunological rejection responses, (2) physiological incompatibilities between the porcine organ and the human recipient and (3) the risk of transmitting zoonotic pathogens from pig to humans. With the introduction of genetically engineered pigs expressing high levels of human complement regulatory proteins or lacking expression of α-Gal epitopes, the HAR can be consistently overcome. However, none of the transgenic porcine organs available to date was fully protected against the binding of anti-non-Gal xenoreactive natural antibodies. The present view is that long-term survival of xenografts after transplantation into primates requires additional modifications of the porcine genome and a specifically tailored immunosuppression regimen compliant with current clinical standards. This requires the production and characterization of multi-transgenic pigs to control HAR, AVR and DXR. The recent emergence of new sophisticated molecular tools such as Zinc-Finger nucleases, Transcription-activator like endonucleases, and the CRISPR/Cas9 system has significantly increased efficiency and precision of the production of genetically modified pigs for xenotransplantation. Several candidate genes, incl. hTM, hHO-1, hA20, CTLA4Ig, have been explored in their ability to improve long-term survival of porcine xenografts after transplantation into non-human primates. This review provides an update on the current status in the production of multi-transgenic pigs for xenotransplantation which could bring porcine xenografts closer to clinical application.
Collapse
|
4
|
Garas LC, Murray JD, Maga EA. Genetically engineered livestock: ethical use for food and medical models. Annu Rev Anim Biosci 2014; 3:559-75. [PMID: 25387117 DOI: 10.1146/annurev-animal-022114-110739] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Recent advances in the production of genetically engineered (GE) livestock have resulted in a variety of new transgenic animals with desirable production and composition changes. GE animals have been generated to improve growth efficiency, food composition, and disease resistance in domesticated livestock species. GE animals are also used to produce pharmaceuticals and as medical models for human diseases. The potential use of these food animals for human consumption has prompted an intense debate about food safety and animal welfare concerns with the GE approach. Additionally, public perception and ethical concerns about their use have caused delays in establishing a clear and efficient regulatory approval process. Ethically, there are far-reaching implications of not using genetically engineered livestock, at a detriment to both producers and consumers, as use of this technology can improve both human and animal health and welfare.
Collapse
|
5
|
Park SK, Roh S, Park JI. A simplified one-step nuclear transfer procedure alters the gene expression patterns and developmental potential of cloned porcine embryos. J Vet Sci 2013; 15:73-80. [PMID: 23820223 PMCID: PMC3973768 DOI: 10.4142/jvs.2014.15.1.73] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2013] [Accepted: 06/28/2013] [Indexed: 12/25/2022] Open
Abstract
Various somatic cell nuclear transfer (SCNT) techniques for mammalian species have been developed to adjust species-specific procedures to oocyte-associated differences among species. Species-specific SCNT protocols may result in different expression levels of developmentally important genes that may affect embryonic development and pregnancy. In the present study, porcine oocytes were treated with demecolcine that facilitated enucleation with protruding genetic material. Enucleation and donor cell injection were performed either simultaneously with a single pipette (simplified one-step SCNT; SONT) or separately with different pipettes (conventional two-step SCNT; CTNT) as the control procedure. After blastocysts from both groups were cultured in vitro, the expression levels of developmentally important genes (OCT4, NANOG, EOMES, CDX2, GLUT-1, PolyA, and HSP70) were analyzed by real-time quantitative polymerase chain reaction. Both the developmental rate according to blastocyst stage as well as the expression levels CDX2, EOMES, and HSP70 were elevated with SONT compared to CTNT. The genes with elevated expression are known to influence trophectoderm formation and heat stress-induced arrest. These results showed that our SONT technique improved the development of SCNT porcine embryos, and increased the expression of genes that are important for placental formation and stress-induced arrest.
Collapse
Affiliation(s)
- Sang Kyu Park
- Cellular Reprogramming and Embryo Biotechnology Laboratory, Dental Research Institute, Seoul National University School of Dentistry, Seoul 110-749, Korea
| | | | | |
Collapse
|
6
|
Whyte JJ, Prather RS. Genetic modifications of pigs for medicine and agriculture. Mol Reprod Dev 2011; 78:879-91. [PMID: 21671302 PMCID: PMC3522184 DOI: 10.1002/mrd.21333] [Citation(s) in RCA: 142] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2011] [Accepted: 05/09/2011] [Indexed: 12/18/2022]
Abstract
Genetically modified swine hold great promise in the fields of agriculture and medicine. Currently, these swine are being used to optimize production of quality meat, to improve our understanding of the biology of disease resistance, and to reduced waste. In the field of biomedicine, swine are anatomically and physiologically analogous to humans. Alterations of key swine genes in disease pathways provide model animals to improve our understanding of the causes and potential treatments of many human genetic disorders. The completed sequencing of the swine genome will significantly enhance the specificity of genetic modifications, and allow for more accurate representations of human disease based on syntenic genes between the two species. Improvements in both methods of gene alteration and efficiency of model animal production are key to enabling routine use of these swine models in medicine and agriculture.
Collapse
Affiliation(s)
- Jeffrey J. Whyte
- National Swine Resource and Research Center, University of Missouri, Columbia, MO, U.S.A
- Department of Biomedical Sciences, University of Missouri, Columbia, MO, U.S.A
- Division of Animal Science, University of Missouri, Columbia, MO, U.S.A
| | - Randall S. Prather
- National Swine Resource and Research Center, University of Missouri, Columbia, MO, U.S.A
- Division of Animal Science, University of Missouri, Columbia, MO, U.S.A
| |
Collapse
|
7
|
Miyagawa S, Takeishi S, Yamamoto A, Ikeda K, Matsunari H, Yamada M, Okabe M, Miyoshi E, Fukuzawa M, Nagashima H. Survey of glycoantigens in cells from alpha1-3galactosyltransferase knockout pig using a lectin microarray. Xenotransplantation 2010; 17:61-70. [PMID: 20149189 DOI: 10.1111/j.1399-3089.2009.00565.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Glycoantigens represent major obstacles to successful xenotransplantation. Even after the alpha1-3galactosyltransferase (GalT) gene knockout (GalT-KO) pigs were produced, non-Gal antigens continue to be present. This study reports on lectin blot analyses for endothelial cells (EC) and fibroblasts from GalT-KO pigs. METHODS Differences in glycoantigens that are produced on cell surfaces in humans and pigs were surveyed. Differences between ECs and fibroblasts from wild-type and GalT-KO pigs were also examined. EC and fibroblasts from GalT-KO pigs (heterozygous and homozygous) with N-acetylglucosaminyltransferase-III (GnT-III), a wild-type EC from the sibling, human EC lines, HUVEC (human EC from umbilical veins), & HAOEC (human EC from aortas), and human fibroblast line were used. EC and fibroblasts were cultured in gelatin-coated dishes for several days. After sonication and centrifugation, the supernatant protein from each cell was labeled with Cy3, applied to a lectin array and scanned with an SC Profiler, and analyzed using an Array Pro Analyzer. RESULTS The pig EC showed higher signals in Euonymus Europaeus (EEL) & Griffonia simplicifolia I-B(4) (GSI-B4), binds alpha-Gal, and in Wisteria Floribunda (WFA), Helix pomatia (HPA), Glycine max (SBA), & Griffonia simplicifolia I-A(4) (GSI-A4), binds GalNAc including the Thomsen-Friedenreich precursor (Tn)-antigen, while the human EC showed strong signals in Ulex europaeus I (UEA-I), Maackia amurensis (MAL), Erythrina cristagalli (ECA), & Trichosanthes japonica I (TJA-I) instead. The EC from the GalT-KO pig signals for EEL & GSI-B4 disappeared and those for Bauhinia purpurea alba (BPL), HPA, SBA, & GSI-A4 were greatly diminished as well, while it up-regulated signals for Sambucus Nigra (SNA), Sambucus sieboldiana (SSA), & TJA-I, bind alpha2-6 sialic acid, compared to the wild-type pig EC. Concerning fibroblasts, the signals for HPA, SBA, & GSI-A4 were the most intense in the wild-type, and the intensities for homozygous-KO were less, approaching those of humans. In addition, the order of the intensities, as detected by Arachis hypogaea (PNA) & Maclura pomifera (MPA), binding Galbeta1-2GalNAc, indicates that the Thomsen-Friedenreich (T)-antigen is likely present on pig fibroblasts. CONCLUSION It is possible that the T-antigen and Tn-antigen related to GalNAc are non-Gal antigens, but, fortunately, not only alpha-Gal but also GalNAc were found to be decreased in the KO-pig.
Collapse
Affiliation(s)
- Shuji Miyagawa
- Department of Surgery, Osaka University Graduate School of Medicine, Suita, Osaka, Japan.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
8
|
Roh S, Choi HY, Park SK, Won C, Kim BW, Kim JH, Kang H, Lee ER, Cho SG. Porcine nuclear transfer using somatic donor cells altered to express male germ cell function. Reprod Fertil Dev 2009; 21:882-91. [PMID: 19698292 DOI: 10.1071/rd09063] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2009] [Accepted: 05/17/2009] [Indexed: 11/23/2022] Open
Abstract
Recent studies reported that the direct transformation of one differentiated somatic cell type into another is possible. In the present study, we were able to modulate the cell fate of somatic cells to take on male germ cell function by introducing cell extracts derived from porcine testis tissue. Fibroblasts were treated with streptolysin O, which reversibly permeabilises the plasma membrane, and incubated with testis extracts. Our results showed that the testis extracts (TE) could activate expression of male germ cell-specific genes, implying that TE can provide regulatory components required for altering the cell fate of fibroblasts. Male germ cell function was sustained for more than 10 days after the introduction of TE. In addition, a single TE-treated cell was injected directly into the cytoplasm of in vitro-matured porcine oocytes. The rate of blastocyst formation was significantly higher in the TE-treated nuclear donor cell group than in the control cell group. The expression level of Nanog, Sox9 and Eomes was drastically increased when altered cells were used as donor nuclei. Our results suggest that TE can be used to alter the cell fate of fibroblasts to express male germ cell function and improve the developmental efficiency of the nuclear transfer porcine embryos.
Collapse
Affiliation(s)
- Sangho Roh
- Embryo Biotechnology Laboratory, Dental Research Institute and CLS21, Seoul National University School of Dentistry, Seoul, Korea. ;
| | | | | | | | | | | | | | | | | |
Collapse
|
9
|
Cytolytic assessment of hyperacute rejection and production of nuclear transfer embryos using hCD46-transgenic porcine embryonic germ cells. ZYGOTE 2009; 17:101-8. [DOI: 10.1017/s096719940800511x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
SummaryHuman complement regulatory protein hCD46 may reduce the hyperacute rejection (HAR) in pig-to-human xenotransplantation. In this study, anhCD46gene was introduced into porcine embryonic germ (EG) cells. Treatment of human serum did not affect the survival of hCD46-transgenic EG cells, whereas the treatment significantly reduced the survival of non-transgenic EG cells (p< 0.01). The transgenic EG cells presumably capable of alleviating HAR were transferred into enucleated oocytes. Among 235 reconstituted oocytes, 35 (14.9%) developed to the blastocyst stage. Analysis of individual embryos indicated that 80.0% (28/35) of embryos contained the transgene hCD46. The result of the present study demonstrates resistance of hCD46-transgenic EG cells against HAR, and the usefulness of the transgenic approach may be predicted by this cytolytic assessment prior to actual production of transgenic pigs. Subsequently performed EG cell nuclear transfer gave rise to hCD46-transgenic embryos. Further study on the transfer of these embryos to recipients may produce hCD46-transgenic pigs.
Collapse
|
10
|
Li J, Villemoes K, Zhang Y, Du Y, Kragh PM, Purup S, Xue Q, Pedersen AM, Jørgensen AL, Jakobsen JE, Bolund L, Yang H, Vajta G. Efficiency of Two Enucleation Methods Connected to Handmade Cloning to Produce Transgenic Porcine Embryos. Reprod Domest Anim 2009; 44:122-7. [DOI: 10.1111/j.1439-0531.2007.01007.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
11
|
Fujimura T, Takahagi Y, Shigehisa T, Nagashima H, Miyagawa S, Shirakura R, Murakami H. Production of alpha 1,3-galactosyltransferase gene-deficient pigs by somatic cell nuclear transfer: a novel selection method for gal alpha 1,3-Gal antigen-deficient cells. Mol Reprod Dev 2008; 75:1372-8. [PMID: 18288673 DOI: 10.1002/mrd.20890] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The objective of the present study was to isolate alpha 1,3-galactosyltransferase (GalGT)-gene double knockout (DKO) cells using a novel simple method of cell selection method. To obtain GalGT-DKO cells, GalGT-gene single knockout (SKO) fetal fibroblast cells were cultured for three to nine passages and GalGT-null cells were separated using a biotin-labeled IB4 lectin attached to streptavidin-coated magnetic beads. After 15-17 days of additional cultivation, seven GalGT-DKO cell colonies were obtained from a total of 2.5 x 10(7) GalGT-SKO cells. A total of 926 somatic nuclear transferred embryos reconstructed with the DKO cells were transferred into eight recipient pigs, producing four farrowed, three liveborns, and six stillborns. Absence of GalGT gene in the cloned pigs was confirmed by PCR and Southern blotting. Flow cytometric analysis revealed that alphaGal antigens were not present in the cells of the cloned DKO pigs.
Collapse
Affiliation(s)
- Tatsuya Fujimura
- The Animal Engineering Research Institute, Midorigahara, Tsukuba, Ibaraki, Japan.
| | | | | | | | | | | | | |
Collapse
|
12
|
Petersen B, Lucas-Hahn A, Oropeza M, Hornen N, Lemme E, Hassel P, Queisser AL, Niemann H. Development and Validation of a Highly Efficient Protocol of Porcine Somatic Cloning Using Preovulatory Embryo Transfer in Peripubertal Gilts. CLONING AND STEM CELLS 2008; 10:355-62. [DOI: 10.1089/clo.2008.0026] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Björn Petersen
- Institute of Farm Animal Genetics (FLI), Department of Biotechnology, Hoeltystrasse 10, 31535 Neustadt, Germany
| | - Andrea Lucas-Hahn
- Institute of Farm Animal Genetics (FLI), Department of Biotechnology, Hoeltystrasse 10, 31535 Neustadt, Germany
| | - Marianne Oropeza
- Institute of Farm Animal Genetics (FLI), Department of Biotechnology, Hoeltystrasse 10, 31535 Neustadt, Germany
| | - Nadine Hornen
- Institute of Farm Animal Genetics (FLI), Department of Biotechnology, Hoeltystrasse 10, 31535 Neustadt, Germany
| | - Erika Lemme
- Institute of Farm Animal Genetics (FLI), Department of Biotechnology, Hoeltystrasse 10, 31535 Neustadt, Germany
| | - Petra Hassel
- Institute of Farm Animal Genetics (FLI), Department of Biotechnology, Hoeltystrasse 10, 31535 Neustadt, Germany
| | - Anna-Lisa Queisser
- Institute of Farm Animal Genetics (FLI), Department of Biotechnology, Hoeltystrasse 10, 31535 Neustadt, Germany
| | - Heiner Niemann
- Institute of Farm Animal Genetics (FLI), Department of Biotechnology, Hoeltystrasse 10, 31535 Neustadt, Germany
| |
Collapse
|
13
|
Kurome M, Tomii R, Ueno S, Hiruma K, Matsumoto S, Okumura K, Nakamura K, Matsumoto M, Kaji Y, Endo F, Nagashima H. Production of Cloned Pigs from Salivary Gland-Derived Progenitor Cells. CLONING AND STEM CELLS 2008; 10:277-86. [DOI: 10.1089/clo.2007.0074] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Mayuko Kurome
- Laboratory of Developmental Engineering, Department of Life Science, Meiji University, Kawasaki 214-8571, Japan
| | - Ryo Tomii
- Laboratory of Developmental Engineering, Department of Life Science, Meiji University, Kawasaki 214-8571, Japan
| | - Satoshi Ueno
- Laboratory of Developmental Engineering, Department of Life Science, Meiji University, Kawasaki 214-8571, Japan
| | - Katsumi Hiruma
- Laboratory of Developmental Engineering, Department of Life Science, Meiji University, Kawasaki 214-8571, Japan
| | - Shirou Matsumoto
- Department of Pediatrics, Graduate School of Medical Science, Kumamoto University, Kumamoto 860-8556, Japan
| | - Kenji Okumura
- Department of Pediatrics, Graduate School of Medical Science, Kumamoto University, Kumamoto 860-8556, Japan
| | - Kimitoshi Nakamura
- Department of Pediatrics, Graduate School of Medical Science, Kumamoto University, Kumamoto 860-8556, Japan
| | - Mitsuhito Matsumoto
- National Agricultural Research Center for Kyushu Okinawa Region, Kumamoto 861-1192, Japan
| | - Yuji Kaji
- National Agricultural Research Center for Kyushu Okinawa Region, Kumamoto 861-1192, Japan
| | - Fumio Endo
- Department of Pediatrics, Graduate School of Medical Science, Kumamoto University, Kumamoto 860-8556, Japan
| | - Hiroshi Nagashima
- Laboratory of Developmental Engineering, Department of Life Science, Meiji University, Kawasaki 214-8571, Japan
| |
Collapse
|
14
|
Akagi S, Kaneyama K, Adachi N, Tsuneishi B, Matsukawa K, Watanabe S, Kubo M, Takahashi S. Bovine Nuclear Transfer Using Fresh Cumulus Cell Nuclei andIn Vivo- orIn Vitro-Matured Cytoplasts. CLONING AND STEM CELLS 2008; 10:173-80. [DOI: 10.1089/clo.2007.0047] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Satoshi Akagi
- Reproductive Biology and Technology Research Team, National Institute of Livestock and Grassland Science, Tsukuba, Ibaraki 305-0901, Japan
| | - Kanako Kaneyama
- National Livestock Breeding Center, Nishigo-mura, Fukushima 961-8511, Japan
| | - Noritaka Adachi
- Ibaraki Livestock Research Center, Ishioka, Ibaraki 315-0132, Japan
| | - Boutaro Tsuneishi
- Kochi Prefectual Livestock Experiment Station, Takaoka-gun, Kochi 789-1233, Japan
| | - Kazutsugu Matsukawa
- Reproductive Biology and Technology Research Team, National Institute of Livestock and Grassland Science, Tsukuba, Ibaraki 305-0901, Japan
| | - Shinya Watanabe
- Reproductive Biology and Technology Research Team, National Institute of Livestock and Grassland Science, Tsukuba, Ibaraki 305-0901, Japan
| | - Masanori Kubo
- National Institute of Animal Health, Tsukuba, Ibaraki 305-0856, Japan
| | - Seiya Takahashi
- Reproductive Biology and Technology Research Team, National Institute of Livestock and Grassland Science, Tsukuba, Ibaraki 305-0901, Japan
| |
Collapse
|
15
|
Kurome M, Ishikawa T, Tomii R, Ueno S, Shimada A, Yazawa H, Nagashima H. Production of transgenic and non-transgenic clones in miniature pigs by somatic cell nuclear transfer. J Reprod Dev 2008; 54:156-63. [PMID: 18296867 DOI: 10.1262/jrd.19165] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Miniature pigs have been recognized as valuable experimental animals in various fields such as medical and pharmaceutical research. However, the amount of information on somatic cell cloning in miniature pigs, as well as genetically modified miniature pigs, is much less than that available for common domestic pigs. The objective of the present study was to establish an efficient technique of cloning miniature pigs by somatic cell nuclear transfer. A high pregnancy rate was achieved following transfer of parthenogenetic (3/3) and cloned (5/6) embryos using female miniature pigs in the early pregnancy period as recipients after estrus synchronization with prostaglandin F2 alpha analog and gonadotrophins. The production efficiency of the cloned miniature pigs using male and female fetal fibroblasts as nucleus donors was 0.9% (2/215 and 3/331, respectively). Cloned miniature pigs were also produced efficiently (7.8%, 5/64) by transferring reconstructed embryos into the uteri of common domestic pigs. When donor cells transfected with the green fluorescent protein (GFP) gene were used in nuclear transfer, the production efficiency of the reconstructed embryos and rate of blastocyst development were comparable to those obtained by non-transfected cells. When transfected cell-derived reconstructed embryos were transferred to three common domestic pig recipients, all became pregnant, and a total of ten transgenic cloned miniature pigs were obtained (piglet production efficiency: 2.7%, 10/365). Hence, we were able to establish a practical system for producing cloned and transgenic-cloned miniature pigs with a syngeneic background.
Collapse
Affiliation(s)
- Mayuko Kurome
- Laboratory of Developmental Engineering, Department of Life Science, Meiji University, Kawasaki, Japan
| | | | | | | | | | | | | |
Collapse
|
16
|
Chae JI, Cho YK, Cho SK, Kim JH, Han YM, Koo DB, Lee KK. Proteomic analysis of pancreas derived from adult cloned pig. Biochem Biophys Res Commun 2008; 366:379-87. [DOI: 10.1016/j.bbrc.2007.11.114] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2007] [Accepted: 11/20/2007] [Indexed: 01/08/2023]
|
17
|
Fujimura T, Murakami H, Kurome M, Takahagi Y, Shigehisa T, Nagashima H. Effects of recloning on the efficiency of production of alpha 1,3-galactosyltransferase knockout pigs. J Reprod Dev 2007; 54:58-62. [PMID: 18094530 DOI: 10.1262/jrd.19110] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Obtaining sufficient transgenic cells via selective cultivation of genetically manipulated somatic cells is difficult due to the limited number of cell divisions. Additionally, if irreversible mutations in a cell's chromosomes occur during selective cultivation and the cell is used as the nuclear donor, somatic cell nuclear transfer (SCNT) embryos often exhibit abnormal development. On the other hand, a SCNT method in which fetal cells derived from SCNT embryos are used as the nuclear donor (recloning method) is an effective technique for obtaining large quantities of transgenic cells. In this study, we compared the in vivo development rate of SCNT embryos produced from porcine alpha1-3 galactosyltransferase gene knockout (GTKO) cells by a recloning method with that of SCNT embryos produced without recloning from porcine GTKO cells (direct method). In the direct method, 557 and 462 cloned embryos were produced using two types of activation methods, the two-step activation (TA) method and the delayed activation (DA) method, and then transferred into 6 and 4 recipients, respectively, but no piglets were born from these recipients. In the recloning method, 956 and 1038 cloned embryos were produced using the TA and DA methods, respectively, and then transferred to 8 and 7 recipients, respectively. Two piglets were born from one recipient in the TA group and 6 piglets were born from 3 recipients in the DA group. This report indicates that the recloning method improved the developmental capacity of SCNT embryos reconstructed with gene-targeted somatic cells.
Collapse
|
18
|
|
19
|
Kurome M, Ueda H, Tomii R, Naruse K, Nagashima H. Production of transgenic-clone pigs by the combination of ICSI-mediated gene transfer with somatic cell nuclear transfer. Transgenic Res 2007; 15:229-40. [PMID: 16604463 DOI: 10.1007/s11248-006-0004-5] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2005] [Accepted: 01/19/2006] [Indexed: 10/24/2022]
Abstract
The objective of this study was to examine whether the ICSI-mediated gene transfer method using in vitro matured oocytes and frozen sperm head could actually produce transgenic pigs. We also aimed at examining whether transgenic pigs can be cloned from somatic cells of a transgenic pig generated by the ICSI-mediated method. A bicistronic gene constituted of the human albumin (hALB) and enhanced green fluorescent protein (EGFP) genes was introduced into pig oocytes by the ICSI-mediated method. Transfer of 702 embryos produced by the ICSI-mediated method into five gilts resulted in 4 pregnancies. When three of the recipients, which had received total 312 of the embryos were autopsied, 32 including 1 transgenic fetuses were obtained. One of the recipients gave birth to three live piglets including one transgenic pig, showing a strong green fluorescence in the eyeballs, oral mucous membrane and subcutaneous tissues. Fluorescent microscopy revealed uniform GFP expression in all cell lines established from kidney, lung and muscle of the founder transgenic pig obtained. Nuclear transfer of these cells resulted in stable in vitro development of cloned embryos into the blastocyst stage, ranging from 12.9 to 19.8%. When 767 of the nuclear transfer embryos were transferred to 5 recipients, all became pregnant and gave birth to a total of six live transgenic-clones. The transgene copy number and integrity in the founder pig were maintained in the primary culture cells established from the founder as well as in the clones produced from these cells. Our study demonstrates that the ICSI-mediated gene transfer is an efficient and practical method to produce transgenic pigs, using frozen sperm heads and in vitro matured oocytes. It was also shown that combination of ICSI-mediated transgenesis and nuclear transfer is a feasible technology of great potential in transgenic pig production.
Collapse
Affiliation(s)
- Mayuko Kurome
- Laboratory of Developmental Engineering, Department of Life Science, School of Agriculture, Meiji University, Tama, Kawasaki, Japan
| | | | | | | | | |
Collapse
|
20
|
Vajta G, Zhang Y, Macháty Z. Somatic cell nuclear transfer in pigs: recent achievements and future possibilities. Reprod Fertil Dev 2007; 19:403-23. [PMID: 17257528 DOI: 10.1071/rd06089] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2006] [Accepted: 10/24/2006] [Indexed: 12/11/2022] Open
Abstract
During the past 6 years, considerable advancement has been achieved in experimental embryology of pigs. This process was mainly generated by the rapidly increasing need for transgenic pigs for biomedical research purposes, both for future xenotransplantation to replace damaged human organs or tissues, and for creating authentic animal models for human diseases to study aetiology, pathogenesis and possible therapy. Theoretically, among various possibilities, an established somatic cell nuclear transfer system with genetically engineered donor cells seems to be an efficient and reliable approach to achieve this goal. However, as the result of unfortunate coincidence of known and unknown factors, porcine embryology had been a handicapped branch of reproductive research in domestic animals and a very intensive and focused research was required to eliminate or minimise this handicap. This review summarises recent achievements both in the background technologies (maturation, activation, embryo culture) and the actual performance of the nuclear replacement. Recent simplified methods for in vivo development after embryo transfer are also discussed. Finally, several fields of potential application for human medical purposes are discussed. The authors conclude that although in this early phase of research no direct evidence can be provided about the practical use of transgenic pigs produced by somatic cell nuclear transfer as organ donors or disease models, the future chances even in medium term are good, and at least proportional with the efforts and sums that are invested into this research area worldwide.
Collapse
Affiliation(s)
- Gábor Vajta
- Population Genetics and Embryology, Department of Genetics and Biotechnology, Danish Institute of Agricultural Sciences, DK-8830 Tjele, Denmark.
| | | | | |
Collapse
|
21
|
Abstract
PURPOSE OF REVIEW Xenotransplantation is an attractive alternative to allogeneic transplantation because of the intractable shortage of donor organs. The latest published developments in this area are discussed as well as recent publications regarding the continuing debates on the ethics of xenotransplantation and the safeguards that should be imposed to assure the minimization of risk to the patient and to human societies. RECENT FINDINGS Several laboratories are concentrating on the development of genetically manipulated donor pigs in order to bypass the immunological barriers against transplantation of porcine organs and cells into humans. Preliminary experiments with these new pig strains suggest that this strategy has a high likelihood of success with respect to hyperacute rejection. Ethical considerations have been extended to the establishment of regulatory, legal, and ethical frameworks that will be necessary to minimize the risk of xenotransplantation to the recipients, their families, and to the worldwide community. SUMMARY Xenotransplantation, because of the complexity of the medical, ethical and legal issues, will likely remain a controversial issue. If the scientific problems are solved, the decision to proceed with clinical application of this technique will depend on a collective decision guided by ethical, regulatory, and legal frameworks established by consensus.
Collapse
Affiliation(s)
- James F George
- Division of Cardiothoracic Surgery, Department of Surgery, University of Alabama at Birmingham, Birmingham, Alabama 35294, USA.
| |
Collapse
|
22
|
Pan D, Zhang Y, Sun X, Zhang J, Li X, Li Y, Gu Z, Dai Y, Wu C, Li N. Cloned pigs derived from somatic cell nuclear transfer embryos cultured in vitro at low oxygen tension. Sci Bull (Beijing) 2006. [DOI: 10.1007/s11434-006-0839-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
23
|
Takahagi Y, Fujimura T, Miyagawa S, Nagashima H, Shigehisa T, Shirakura R, Murakami H. Production of ?1,3-galactosyltransferase gene knockout pigs expressing both human decay-accelerating factor andN-acetylglucosaminyltransferase III. Mol Reprod Dev 2005; 71:331-8. [PMID: 15806557 DOI: 10.1002/mrd.20305] [Citation(s) in RCA: 101] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Heterozygous alpha 1,3-galactosyltransferase (GT) gene knockout pigs were produced with transgenic pig fetal cells expressing both human decay-accelerating factor (hDAF) and N-acetylglucosaminyltransferase III (GnT-III). In this study, we assessed the gene targeting efficiency in the transgenic pig fetal cells derived from different fetal tissues such as brain, skin, heart, and liver, or fetal carcass. Targeted cell colonies were selected by hygromycin B. The GT-knockout colonies (KO colonies) were obtained equally from the cells derived from all tissues except liver. Staining with five antibodies against intermediate filaments, all examined KO cell lines stained positive for vimentin with the exception of a colony that stained positive for both vimentin and glial fibrillary acidic protein simultaneously. This is the first study to produce KO cells from the astrocytes. Some of these KO cell lines were used for nuclear transfer (NT) to obtain KO pig fetuses. Fourteen fetuses were obtained from two recipients of the embryo transfer and eight of them had normal ploidy. The cells from the KO pig fetuses were also used for NT to produce cloned KO pigs. Two healthy clone pigs were born. These pigs were determined to have a heterozygous knockout GT gene and the two transgenes. The cells collected from the KO pigs were shown to have similar expression levels of hDAF and GnT-III compared to their original transgenic pigs and less than a half levels of the alphaGal epitopes existed in wild-type pig cells.
Collapse
Affiliation(s)
- Yoichi Takahagi
- The Animal Engineering Research Institute, Midorigahara, Tsukuba, Ibaraki, Japan
| | | | | | | | | | | | | |
Collapse
|
24
|
Ueno S, Kurome M, Ueda H, Tomii R, Hiruma K, Nagashima H. Effects of Maturation Conditions on Spindle Morphology in Porcine MII Oocytes. J Reprod Dev 2005; 51:405-10. [PMID: 15812143 DOI: 10.1262/jrd.16091] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Incomplete cytoplasmic maturation of in vitro matured (IVM) oocytes has been known to cause microtubule and microfilament alterations, which may result in abnormal pronuclear formation and failed embryonic development. We examined the influences of maturation conditions on meiotic spindle morphology at metaphase of meiosis II (MII) in porcine oocytes. Porcine oocytes were matured under various conditions, i.e., in vitro or in vivo, with different amounts of cumulus cells, with or without hormonal supplements, and with various exposure durations to the hormones, to examine the effects on spindle morphology in MII oocytes by immunofluorescence under confocal laser microscopy. Interpolar spindle length (microm) and spindle area (microm2) were compared among these maturation conditions. The spindle length was significantly shorter in IVM oocytes compared to those matured in vivo. Oocytes collected from cumulus oocyte complexes (COCs), which were poor in cumulus cells, showed smaller spindle areas than those from cumulus-rich COCs. The spindle length and area were both significantly reduced in oocytes grown without hormonal supplements. When oocytes were grown with hormonal supplements for either 6 or 22 hours for the first half of culture, there was no difference in the spindle morphology between these oocytes. These results suggested that maturation conditions significantly influence morphogenesis of MII spindles in porcine oocytes. Oocytes matured in poor conditions were more likely to have a shorter spindle length (long axis) and smaller spindle areas.
Collapse
Affiliation(s)
- Satoshi Ueno
- Laboratory of Developmental Engineering, Department of Life Science, School of Agriculture, Meiji University, Kawasaki, Japan.
| | | | | | | | | | | |
Collapse
|