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Kim JH, Shim J, Ko N, Kim HJ, Lee Y, Choi K. Analysis of production efficiency of cloned transgenic Yucatan miniature pigs according to recipient breeds with embryo transfer conditions. Theriogenology 2024; 218:193-199. [PMID: 38330863 DOI: 10.1016/j.theriogenology.2024.01.026] [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: 10/16/2023] [Revised: 01/05/2024] [Accepted: 01/24/2024] [Indexed: 02/10/2024]
Abstract
The purpose of this study was to compare the efficiency of the production of cloned transgenic Yucatan miniature pigs (YMPs) using two recipient breeds, i.e., YMPs and domestic pigs (DPs), under various embryo transfer conditions. We initially assessed the in vitro developmental competence of embryos obtained via somatic cell nuclear transfer (SCNT) from three different transgenic donor cells. No difference was observed among the three groups regarding developmental competence. Furthermore, the cloning efficiency remained consistent among the three groups after the transfer of the SCNT embryos to each surrogate mother. Subsequently, to compare the efficiency of the production of cloned transgenic YMPs between the two recipient breeds using varying parameters, including ovulation status (preovulation and postovulation), duration of in vitro culture (IVC) (incubated within 24 h and 24-48 h), and the number of transferred SCNT embryos (less than and more than 300), we assessed the pregnancy rates, delivery rates, mean offspring counts, and cloning efficiency. Regarding the ovulation status, YMPs exhibited higher pregnancy rates, delivery rates, and cloning efficiency compared with DPs in both statuses. Moreover, the pregnancy rates, delivery rates, and cloning efficiency were affected by the ovulation status in DPs, but not in YMPs. The comparison of IVC duration between groups revealed that YMPs had higher pregnancy rates vs. DPs in both conditions. SCNT embryos cultured for 24-48 h in YMPs yielded higher delivery rates and cloning efficiency compared with those cultured for less than 24 h in DPs. Finally, the analysis based on the number of transferred SCNT embryos showed that both the pregnancy and delivery rates were higher in YMPs vs. DPs. However, the highest average number of offspring was obtained when more than 300 SCNT embryos were transferred into DPs, whereas the cloning efficiency was higher in YMPs vs. DPs. Our results suggest that YMPs are more suitable recipients than are DPs under various conditions for the production of cloned transgenic YMPs.
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Affiliation(s)
- Jun-Hyeong Kim
- Optipharm Inc, 63, Osongsaengmyeong 6-ro, Osong-eup, Heungdeok-gu, Cheongju-si, Chungcheongbuk-do, 28158, Republic of Korea
| | - Joohyun Shim
- Optipharm Inc, 63, Osongsaengmyeong 6-ro, Osong-eup, Heungdeok-gu, Cheongju-si, Chungcheongbuk-do, 28158, Republic of Korea
| | - Nayoung Ko
- Optipharm Inc, 63, Osongsaengmyeong 6-ro, Osong-eup, Heungdeok-gu, Cheongju-si, Chungcheongbuk-do, 28158, Republic of Korea
| | - Hyoung-Joo Kim
- Optipharm Inc, 63, Osongsaengmyeong 6-ro, Osong-eup, Heungdeok-gu, Cheongju-si, Chungcheongbuk-do, 28158, Republic of Korea
| | - Yongjin Lee
- Optipharm Inc, 63, Osongsaengmyeong 6-ro, Osong-eup, Heungdeok-gu, Cheongju-si, Chungcheongbuk-do, 28158, Republic of Korea
| | - Kimyung Choi
- Optipharm Inc, 63, Osongsaengmyeong 6-ro, Osong-eup, Heungdeok-gu, Cheongju-si, Chungcheongbuk-do, 28158, Republic of Korea.
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Kim G, Roy PK, Fang X, Hassan BM, Cho J. Improved preimplantation development of porcine somatic cell nuclear transfer embryos by caffeine treatment. J Vet Sci 2019; 20:e31. [PMID: 31161749 PMCID: PMC6538509 DOI: 10.4142/jvs.2019.20.e31] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Revised: 01/04/2019] [Accepted: 05/07/2019] [Indexed: 11/20/2022] Open
Abstract
This study examined the effects of a caffeine treatment to improve nuclear reprogramming in porcine cloned embryos. Embryonic development and the expression of genes related to pluripotency (POU5F1, SOX2, NANOG, and CDX2) were compared after caffeine supplementation during manipulation at different concentrations (0, 1.25, 2.5, and 5.0 mM) and after varying the delayed activation time (control, 1, 2, and 4 h) after fusion. Caffeine added to media during manipulation produced a higher rate of development to blastocysts in the 1.25 mM group than in the other concentration groups (22.8% vs. 16.1%, 16.2%, and 19.2%; p < 0.05). When caffeine was added during the 4 h delayed activation, the 1.25 mM caffeine concentration produced a significantly higher rate of development than those in the other 4 h-activation-delayed caffeine concentration groups (22.4% vs. 9.4%, 14.0%, and 11.1%; p < 0.05). On the other hand, no significant improvement over that in the control group was observed when caffeine was supplemented during both the manipulation period and delayed activation period (16.0% vs. 15.2%), respectively. The levels of POU5F1, SOX2, and NANOG expression in blastocysts were significantly higher in the delayed activation caffeine group (4 h, 1.25 mM) than in the control group (1 h, 0 mM; p < 0.05). In conclusion, a caffeine treatment at 1.25 mM during delayed activation for 4 h can improve the preimplantation development of porcine somatic cell nuclear transfer embryos by activating nuclear reprogramming.
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Affiliation(s)
- Ghangyong Kim
- College of Veterinary Medicine, Chungnam National University, Daejeon 34134, Korea.,Xenotransplantation Research Center, College of Medicine, Seoul National University, Seoul 03080, Korea
| | - Pantu Kumar Roy
- College of Veterinary Medicine, Chungnam National University, Daejeon 34134, Korea
| | - Xun Fang
- College of Veterinary Medicine, Chungnam National University, Daejeon 34134, Korea
| | - Bahia Ms Hassan
- College of Veterinary Medicine, Chungnam National University, Daejeon 34134, Korea
| | - Jongki Cho
- College of Veterinary Medicine, Chungnam National University, Daejeon 34134, Korea.
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Lee J, Lee Y, Lee GS, Lee ST, Lee E. Comparative study of the developmental competence of cloned pig embryos derived from spermatogonial stem cells and fetal fibroblasts. Reprod Domest Anim 2019; 54:1258-1264. [PMID: 31283039 DOI: 10.1111/rda.13507] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Accepted: 07/04/2019] [Indexed: 01/27/2023]
Abstract
Spermatogonial stem cells (SSC) are promising resources for genetic preservation and restoration of male germ cells in humans and animals. However, no studies have used SSC as donor nuclei in pig somatic cell nuclear transfer (SCNT). This study investigated the potential for use of porcine SSC as a nuclei donor for SCNT and developmental competence of SSC-derived cloned embryos. In addition, demecolcine was investigated to determine whether it could prevent rupture of SSC during SCNT. When the potential of SSC to support embryonic development after SCNT was compared with that of foetal fibroblasts (FF), SSC-derived SCNT embryos showed a higher (p < .05) developmental competence to the blastocyst stage (47.8%) than FF-derived embryos (25.6%). However, when SSC were used as donor nuclei in the SCNT process, cell fusion rates were lower (p < .05) than when FF were used (61.9% vs. 75.8%). Treatment of SSC with demecolcine significantly (p < .05) decreased rupture of SSC during the SCNT procedure (7.5% vs. 18.8%) and increased fusion of cell-oocyte couplets compared with no treatment (74.6% vs. 61.6%). In addition, SSC-derived SCNT embryos showed higher blastocyst formation (48.4%) than FF-derived embryos without (28.4%) and with demecolcine treatment (17.4%), even after demecolcine treatment. Our results demonstrate that porcine SSC are a desirable donor cell type for production of SCNT pig embryos and that demecolcine increases production efficiency of cloned embryos by inhibiting rupture of nuclei donor SSC during SCNT.
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Affiliation(s)
- Joohyeong Lee
- Institute of Veterinary Science, Kangwon National University, Chuncheon, Korea
| | - Yongjin Lee
- College of Veterinary Medicine, Kangwon National University, Chuncheon, Korea
| | - Geun-Shik Lee
- Institute of Veterinary Science, Kangwon National University, Chuncheon, Korea.,College of Veterinary Medicine, Kangwon National University, Chuncheon, Korea
| | - Seung Tae Lee
- College of Animal Life Science, Kangwon National University, Chuncheon, Korea
| | - Eunsong Lee
- Institute of Veterinary Science, Kangwon National University, Chuncheon, Korea.,College of Veterinary Medicine, Kangwon National University, Chuncheon, Korea
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Lee Y, Shim J, Ko N, Kim HJ, Park JK, Kwak K, Kim H, Choi K. Effect of alanine supplementation during in vitro maturation on oocyte maturation and embryonic development after parthenogenesis and somatic cell nuclear transfer in pigs. Theriogenology 2019; 127:80-87. [DOI: 10.1016/j.theriogenology.2019.01.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Revised: 12/07/2018] [Accepted: 01/03/2019] [Indexed: 01/07/2023]
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Exogenous Nitric Oxide Donation During In Vitro Maturation Improves Embryonic Development after Parthenogenesis and Somatic Cell Nuclear Transfer in Pigs. JOURNAL OF ANIMAL REPRODUCTION AND BIOTECHNOLOGY 2018. [DOI: 10.12750/jet.2018.33.4.211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
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Taweechaipaisankul A, Jin JX, Lee S, Kim GA, Suh YH, Ahn MS, Park SJ, Lee BY, Lee BC. Improved early development of porcine cloned embryos by treatment with quisinostat, a potent histone deacetylase inhibitor. J Reprod Dev 2018; 65:103-112. [PMID: 30587665 PMCID: PMC6473109 DOI: 10.1262/jrd.2018-098] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Recently, the modification of the epigenetic status of somatic cell nuclear transfer (SCNT) embryos by treatment with histone deacetylase inhibitors (HDACis) has made it possible to alter
epigenetic traits and improve the developmental competence of these embryos. In the current study, we examined the effects of an HDACi, quisinostat (JNJ), on the in vitro
development of porcine cloned embryos and their epigenetic nuclear reprogramming status. SCNT embryos were cultured under various conditions, and we found that treatment with 100 nM JNJ for
24 h post activation could improve blastocyst formation rates compared to the control (P < 0.05). Therefore, this was chosen as the optimal condition and used for further investigations.
To explore the effects of JNJ on the nuclear reprogramming of early stage embryos and how it improved cloning efficiency, immunofluorescence staining and quantitative real-time PCR were
performed. From the pseudo-pronuclear to 2-cell stages, the levels of acetylation of histone 3 at lysine 9 (AcH3K9) and acetylation of histone 4 at lysine 12 (AcH4K12) increased, and global
DNA methylation levels revealed by anti-5-methylcytosine (5-mC) antibody staining were decreased in the JNJ-treated group compared to the control (P < 0.05). However, JNJ treatment failed
to alter AcH3K9, AcH4K12, or 5-mC levels at the 4-cell embryo stage. Moreover, JNJ treatment significantly upregulated the expression of the development-related genes OCT4,
SOX2, and NANOG, and reduced the expression of genes related to DNA methylation (DNMT1, DNMT3a, and
DNMT3b) and histone acetylation (HDAC1, HDAC2, and HDAC3). Together, these results suggest that treatment of SCNT
embryos with JNJ could promote their developmental competence by altering epigenetic nuclear reprogramming events.
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Affiliation(s)
- Anukul Taweechaipaisankul
- Department of Theriogenology and Biotechnology, Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul 08826, Republic of Korea
| | - Jun-Xue Jin
- Department of Theriogenology and Biotechnology, Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul 08826, Republic of Korea.,Key Laboratory of Animal Cellular and Genetic Engineering of Heilongjiang Province, College of Life Science, Northeast Agricultural University, Heilongjiang 150030, China
| | - Sanghoon Lee
- Department of Theriogenology and Biotechnology, Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul 08826, Republic of Korea.,Futuristic Animal Resource & Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do 28116, Republic of Korea
| | - Geon A Kim
- Department of Theriogenology and Biotechnology, Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul 08826, Republic of Korea
| | - Yoon Ho Suh
- College of Veterinary Medicine, Konkuk University, Seoul 05029, Republic of Korea
| | - Min Seok Ahn
- Department of Materials Science & Engineering, Yonsei University, Seoul 120749, Republic of Korea
| | - Se Jun Park
- Gwangju Institute of Science and Technology, Gwangju 61005, Republic of Korea
| | - Byeong You Lee
- Department of Automotive Engineering, Hanyang University, Seoul 04763, Republic of Korea
| | - Byeong Chun Lee
- Department of Theriogenology and Biotechnology, Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul 08826, Republic of Korea
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Lee J, Lee H, Lee Y, Park B, Elahi F, Lee ST, Park CK, Hyun SH, Lee E. In vitro oocyte maturation in a medium containing reduced sodium chloride improves the developmental competence of pig oocytes after parthenogenesis and somatic cell nuclear transfer. Reprod Fertil Dev 2018; 29:1625-1634. [PMID: 27592715 DOI: 10.1071/rd15488] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Accepted: 08/03/2016] [Indexed: 11/23/2022] Open
Abstract
The present study investigated the effects of IVM in hypotonic medium containing reduced (61.6mM) NaCl compared with isotonic medium containing 108.0mM NaCl (designated L and N respectively) on oocyte maturation and embryonic development in pigs. IVM culture was divided into four periods at 11-h intervals. Oocytes cultured in N for 33h and then in L for 11h of IVM (N-N-N-L) showed significantly improved (P<0.05) nuclear maturation of oocytes (75.4-79.0% vs 60.2-85.8%) and blastocyst formation (61.5-66.1% vs 45.2-67.5%) after parthenogenesis (PA) compared with other treatments (L-L-L-L, L-L-L-N, L-L-N-L, N-N-L-L, N-N-L-N, L-L-N-L, L-N-N-L and N-L-N-L). Oocytes matured in L-L-L-L and N-N-N-L had an increased (P<0.05) perivitelline space (11.0-12.5 vs 5.5µm) and intraoocyte reduced glutathione (GSH) content (1.39-1.41 vs 1.00 pixels per oocyte) relative to oocytes matured in N-N-N-N. Somatic cell nuclear transfer (SCNT) embryos derived from the N-N-N-L treatment had significantly (P<0.05) higher blastocyst formation (53.5%) than embryos derived from Medium-199 (37.4%) and N-N-N-N (41.8%) treatments. Overall, the results demonstrate that maturation of pig oocytes in hypotonic medium with reduced NaCl during the last 11h of IVM increases the developmental competence of oocytes after PA and SCNT by improving the cytoplasmic microenvironment, including an increased GSH content in IVM oocytes.
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Affiliation(s)
- Joohyeong Lee
- Laboratory of Theriogenology, College of Veterinary Medicine, Kangwon National University, Chuncheon, Gangwon 24341, Korea
| | - Hanna Lee
- Laboratory of Theriogenology, College of Veterinary Medicine, Kangwon National University, Chuncheon, Gangwon 24341, Korea
| | - Yongjin Lee
- Laboratory of Theriogenology, College of Veterinary Medicine, Kangwon National University, Chuncheon, Gangwon 24341, Korea
| | - Bola Park
- Laboratory of Theriogenology, College of Veterinary Medicine, Kangwon National University, Chuncheon, Gangwon 24341, Korea
| | - Fazle Elahi
- Laboratory of Theriogenology, College of Veterinary Medicine, Kangwon National University, Chuncheon, Gangwon 24341, Korea
| | - Seung Tae Lee
- Division of Applied Animal Science, College of Animal Life Science, Kangwon National University, Chuncheon, Gangwon 24341, Korea
| | - Choon-Keun Park
- Division of Applied Animal Science, College of Animal Life Science, Kangwon National University, Chuncheon, Gangwon 24341, Korea
| | - Sang-Hwan Hyun
- Laboratory of Veterinary Embryology and Biotechnology, College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk 28644, Korea
| | - Eunsong Lee
- Laboratory of Theriogenology, College of Veterinary Medicine, Kangwon National University, Chuncheon, Gangwon 24341, Korea
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Lee J, You J, Lee GS, Lee ST, Hyun SH, Lee E. Combined Treatment with Demecolcine and 6-Dimethylaminopurine during Postactivation Improves Developmental Competence of Somatic Cell Nuclear Transfer Embryos in Pigs. Anim Biotechnol 2017; 29:41-49. [PMID: 28358237 DOI: 10.1080/10495398.2017.1294598] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
This study determined the effects of postactivation treatment with demecolcine and/or 6-dimethylaminopurine (6-DMAP) on in vivo and in vitro developmental competence of somatic cell nuclear transfer (SCNT) embryos in pigs. SCNT embryos were treated for 4 hours with 0.4 µg/mL demecolcine, 2 mM 6-DMAP, or both after electric activation, then transferred to surrogate pigs or cultured for 7 days. The formation rate of SCNT embryos with a single pronucleus was higher in combined treatment with demecolcine and 6-DMAP (95.2%) than treatment with demecolcine alone (87.1%). Blastocyst formation of SCNT embryos was significantly increased in combined treatment with demecolcine and 6-DMAP (48.7%) compared with demecolcine (22.2%) or 6-DMAP alone (37.3%). Fluctuation of maturation promoting factor activity showed different patterns among various postactivation treatments. Pregnancy was established in 1 of 5 surrogates after transfer of SCNT embryos that were treated with demecolcine and 6-DMAP. The pregnant surrogate delivered one healthy live piglet. The results of our study demonstrated that postactivation treatment with demecolcine and 6-DMAP together improved preimplantation development and supported normal in vivo development of SCNT pig embryos, probably influencing MPF activity and nuclear remodeling, including induction of single pronucleus formation after electric activation.
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Affiliation(s)
- Joohyeong Lee
- a College of Veterinary Medicine , Kangwon National University , Chuncheon , Korea.,b Institute of Veterinary Science , Kangwon National University , Chuncheon , Korea
| | - Jinyoung You
- a College of Veterinary Medicine , Kangwon National University , Chuncheon , Korea
| | - Geun-Shik Lee
- a College of Veterinary Medicine , Kangwon National University , Chuncheon , Korea
| | - Seung Tae Lee
- c College of Animal Life Science , Kangwon National University , Chuncheon , Korea
| | - Sang-Hwan Hyun
- d College of Veterinary Medicine , Chungbuk National University , Cheongju , Korea
| | - Eunsong Lee
- a College of Veterinary Medicine , Kangwon National University , Chuncheon , Korea.,b Institute of Veterinary Science , Kangwon National University , Chuncheon , Korea
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Lee Y, Lee H, Park B, Elahi F, Lee J, Lee ST, Park CK, Hyun SH, Lee E. Alpha-linolenic acid treatment during oocyte maturation enhances embryonic development by influencing mitogen-activated protein kinase activity and intraoocyte glutathione content in pigs1. J Anim Sci 2016; 94:3255-3263. [DOI: 10.2527/jas.2016-0384] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Y. Lee
- Laboratory of Theriogenology, College of Veterinary Medicine, Kangwon National University, Chuncheon 200-701, Republic of Korea
| | - H. Lee
- Laboratory of Theriogenology, College of Veterinary Medicine, Kangwon National University, Chuncheon 200-701, Republic of Korea
| | - B. Park
- Laboratory of Theriogenology, College of Veterinary Medicine, Kangwon National University, Chuncheon 200-701, Republic of Korea
| | - F. Elahi
- Laboratory of Theriogenology, College of Veterinary Medicine, Kangwon National University, Chuncheon 200-701, Republic of Korea
| | - J. Lee
- Laboratory of Theriogenology, College of Veterinary Medicine, Kangwon National University, Chuncheon 200-701, Republic of Korea
| | - S. T. Lee
- Division of Applied Animal Science, College of Animal Life Science, Kangwon National University, Chuncheon 200-701, Republic of Korea
| | - C. K. Park
- Division of Applied Animal Science, College of Animal Life Science, Kangwon National University, Chuncheon 200-701, Republic of Korea
| | - S. H. Hyun
- Laboratory of Veterinary Embryology and Biotechnology, College of Veterinary Medicine, Chungbuk National University, Cheongju 361-763, Republic of Korea
| | - E. Lee
- Laboratory of Theriogenology, College of Veterinary Medicine, Kangwon National University, Chuncheon 200-701, Republic of Korea
- Institute of Veterinary Science, Kangwon National University, Chuncheon 200-701, Republic of Korea
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Kim E, Zheng Z, Jeon Y, Jin YX, Hwang SU, Cai L, Lee CK, Kim NH, Hyun SH. An Improved System for Generation of Diploid Cloned Porcine Embryos Using Induced Pluripotent Stem Cells Synchronized to Metaphase. PLoS One 2016; 11:e0160289. [PMID: 27472781 PMCID: PMC4966966 DOI: 10.1371/journal.pone.0160289] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Accepted: 07/15/2016] [Indexed: 12/29/2022] Open
Abstract
Pigs provide outstanding models of human genetic diseases due to their striking similarities with human anatomy, physiology and genetics. Although transgenic pigs have been produced using genetically modified somatic cells and nuclear transfer (SCNT), the cloning efficiency was extremely low. Here, we report an improved method to produce diploid cloned embryos from porcine induced pluripotent stem cells (piPSCs), which were synchronized to the G2/M stage using a double blocking method with aphidicolin and nocodazole. The efficiency of this synchronization method on our piPSC lines was first tested. Then, we modified our traditional SCNT protocol to find a workable protocol. In particular, the removal of a 6DMAP treatment post-activation enhanced the extrusion rate of pseudo-second-polar bodies (p2PB) (81.3% vs. 15.8%, based on peak time, 4hpa). Moreover, an immediate activation method yielded significantly more blastocysts than delayed activation (31.3% vs. 16.0%, based on fused embryos). The immunofluorescent results confirmed the effect of the 6DMAP treatment removal, showing remarkable p2PB extrusion during a series of nuclear transfer procedures. The reconstructed embryos from metaphase piPSCs with our modified protocol demonstrated normal morphology at 2-cell, 4-cell and blastocyst stages and a high rate of normal karyotype. This study demonstrated a new and efficient way to produce viable cloned embryos from piPSCs when synchronized to the G2/M phase of the cell cycle, which may lead to opportunities to produce cloned pigs from piPSCs more efficiently.
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Affiliation(s)
- Eunhye Kim
- Laboratory of Veterinary Embryology and Biotechnology, (VETEMBIO), Veterinary Medical Center and Collage of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk, Republic of Korea
- Institute for Stem Cell & Regenerative Medicine (ISCRM), Chungbuk National University, Cheongju, Chungbuk, Republic of Korea
| | - Zhong Zheng
- Laboratory of Veterinary Embryology and Biotechnology, (VETEMBIO), Veterinary Medical Center and Collage of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk, Republic of Korea
| | - Yubyeol Jeon
- Laboratory of Veterinary Embryology and Biotechnology, (VETEMBIO), Veterinary Medical Center and Collage of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk, Republic of Korea
| | - Yong-Xun Jin
- Department of Animal Sciences, Agriculture, Life, & Environmental Sciences, Chungbuk National University, Cheongju, Chungbuk, Republic of Korea
| | - Seon-Ung Hwang
- Laboratory of Veterinary Embryology and Biotechnology, (VETEMBIO), Veterinary Medical Center and Collage of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk, Republic of Korea
- Institute for Stem Cell & Regenerative Medicine (ISCRM), Chungbuk National University, Cheongju, Chungbuk, Republic of Korea
| | - Lian Cai
- Laboratory of Veterinary Embryology and Biotechnology, (VETEMBIO), Veterinary Medical Center and Collage of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk, Republic of Korea
| | - Chang-Kyu Lee
- Department of Agricultural Biotechnology, Research Institute for Agriculture and Life Science, Seoul National University, Seoul, Republic of Korea
| | - Nam-Hyung Kim
- Department of Animal Sciences, Agriculture, Life, & Environmental Sciences, Chungbuk National University, Cheongju, Chungbuk, Republic of Korea
| | - Sang-Hwan Hyun
- Laboratory of Veterinary Embryology and Biotechnology, (VETEMBIO), Veterinary Medical Center and Collage of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk, Republic of Korea
- Institute for Stem Cell & Regenerative Medicine (ISCRM), Chungbuk National University, Cheongju, Chungbuk, Republic of Korea
- * E-mail:
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Lee J, Park JI, Lee GS, Choi JH, Lee ST, Park CK, Kim DY, Hyun SH, Lee E. Colcemid treatment during oocyte maturation improves preimplantation development of cloned pig embryos by influencing meiotic progression and cytoplasmic maturation. Mol Reprod Dev 2015; 82:489-97. [DOI: 10.1002/mrd.22498] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2014] [Accepted: 04/28/2015] [Indexed: 11/06/2022]
Affiliation(s)
- Joohyeong Lee
- College of Veterinary Medicine; Kangwon National University; Chuncheon Korea
| | - Jong-Im Park
- College of Veterinary Medicine; Konkuk University; Seoul Korea
| | - Geun-Shik Lee
- College of Veterinary Medicine; Kangwon National University; Chuncheon Korea
- Institute of Veterinary Science; Kangwon National University; Chuncheon Korea
| | - Jung Hoon Choi
- College of Veterinary Medicine; Kangwon National University; Chuncheon Korea
- Institute of Veterinary Science; Kangwon National University; Chuncheon Korea
| | - Seung Tae Lee
- Division of Applied Animal Science, College of Animal Life Science; Kangwon National University; Chuncheon Korea
| | - Choon-Keun Park
- Division of Applied Animal Science, College of Animal Life Science; Kangwon National University; Chuncheon Korea
| | - Dae Young Kim
- Department of Life Science, College of BioNano Technology; Gachon University; Incheon Korea
| | - Sang-Hwan Hyun
- College of Veterinary Medicine; Chungbuk National University; Cheongju Korea
| | - Eunsong Lee
- College of Veterinary Medicine; Kangwon National University; Chuncheon Korea
- Institute of Veterinary Science; Kangwon National University; Chuncheon Korea
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12
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Lee J, Park JI, Yun JI, Lee Y, Yong H, Lee ST, Park CK, Hyun SH, Lee GS, Lee E. Rapamycin treatment during in vitro maturation of oocytes improves embryonic development after parthenogenesis and somatic cell nuclear transfer in pigs. J Vet Sci 2015; 16:373-80. [PMID: 25797293 PMCID: PMC4588024 DOI: 10.4142/jvs.2015.16.3.373] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Accepted: 03/07/2015] [Indexed: 11/27/2022] Open
Abstract
This study was conducted to investigate the effects of rapamycin treatment during in vitro maturation (IVM) on oocyte maturation and embryonic development after parthenogenetic activation (PA) and somatic cell nuclear transfer (SCNT) in pigs. Morphologically good (MGCOCs) and poor oocytes (MPCOCs) were untreated or treated with 1 nM rapamycin during 0-22 h, 22-42 h, or 0-42 h of IVM. Rapamycin had no significant effects on nuclear maturation and blastocyst formation after PA of MGCOCs. Blastocyst formation after PA was significantly increased by rapamycin treatment during 22-42 h and 0-42 h (46.6% and 46.5%, respectively) relative to the control (33.3%) and 0-22 h groups (38.6%) in MPCOCs. In SCNT, blastocyst formation tended to increase in MPCOCs treated with rapamycin during 0-42 h of IVM relative to untreated oocytes (20.3% vs. 14.3%, 0.05 < p < 0.1), while no improvement was observed in MGCOCs. Gene expression analysis revealed that transcript abundance of Beclin 1 and microtubule-associated protein 1 light chain 3 mRNAs was significantly increased in MPCOCs by rapamycin relative to the control. Our results demonstrated that autophagy induction by rapamycin during IVM improved developmental competence of oocytes derived from MPCOCs.
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Affiliation(s)
- Joohyeong Lee
- College of Veterinary Medicine, Kangwon National University, Chuncheon 200-701, Korea
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13
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Grupen CG. The evolution of porcine embryo in vitro production. Theriogenology 2014; 81:24-37. [PMID: 24274407 DOI: 10.1016/j.theriogenology.2013.09.022] [Citation(s) in RCA: 99] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2013] [Revised: 09/14/2013] [Accepted: 09/14/2013] [Indexed: 12/23/2022]
Abstract
The in vitro production of porcine embryos has presented numerous challenges to researchers over the past four decades. Some of the problems encountered were specific to porcine gametes and embryos and needed the concerted efforts of many to overcome. Gradually, porcine embryo in vitro production systems became more reliable and acceptable rates of blastocyst formation were achieved. Despite the significant improvements, the problem of polyspermic fertilization has still not been adequately resolved and the embryo in vitro culture conditions are still considered to be suboptimal. Whereas early studies focused on increasing our understanding of the reproductive processes involved, the technology evolved to the point where in vitro-matured oocytes and in vitro-produced embryos could be used as research material for developing associated reproductive technologies, such as SCNT and embryo cryopreservation. Today, the in vitro procedures used to mature oocytes and culture embryos are integral to the production of transgenic pigs by SCNT. This review discusses the major achievements, advances, and knowledge gained from porcine embryo in vitro production studies and highlights the future research perspectives of this important technology.
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Affiliation(s)
- Christopher G Grupen
- Faculty of Veterinary Science, The University of Sydney, Camden, New South Wales, Australia.
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Lee J, Lee Y, Park B, Elahi F, Jeon Y, Hyun SH, Lee E. Developmental competence of IVM pig oocytes after SCNT in relation to the shrinkage pattern induced by hyperosmotic treatment. Theriogenology 2014; 81:974-81. [DOI: 10.1016/j.theriogenology.2014.01.022] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2013] [Revised: 01/15/2014] [Accepted: 01/22/2014] [Indexed: 11/15/2022]
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15
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Jin YX, Jeon Y, Lee SH, Kwon MS, Kim T, Cui XS, Hyun SH, Kim NH. Production of pigs expressing a transgene under the control of a tetracycline-inducible system. PLoS One 2014; 9:e86146. [PMID: 24454957 PMCID: PMC3893280 DOI: 10.1371/journal.pone.0086146] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2013] [Accepted: 12/06/2013] [Indexed: 11/21/2022] Open
Abstract
Pigs are anatomically and physiologically closer to humans than other laboratory animals. Transgenic (TG) pigs are widely used as models of human diseases. The aim of this study was to produce pigs expressing a tetracycline (Tet)-inducible transgene. The Tet-on system was first tested in infected donor cells. Porcine fetal fibroblasts were infected with a universal doxycycline-inducible vector containing the target gene enhanced green fluorescent protein (eGFP). At 1 day after treatment with 1 µg/ml doxycycline, the fluorescence intensity of these cells was increased. Somatic cell nuclear transfer (SCNT) was then performed using these donor cells. The Tet-on system was then tested in the generated porcine SCNT-TG embryos. Of 4,951 porcine SCNT-TG embryos generated, 850 were cultured in the presence of 1 µg/ml doxycycline in vitro. All of these embryos expressed eGFP and 15 embryos developed to blastocyst stage. The remaining 4,101 embryos were transferred to thirty three surrogate pigs from which thirty eight cloned TG piglets were obtained. PCR analysis showed that the transgene was inserted into the genome of each of these piglets. Two TG fibroblast cell lines were established from these TG piglets, and these cells were used as donor cells for re-cloning. The re-cloned SCNT embryos expressed the eGFP transgene under the control of doxycycline. These data show that the expression of transgenes in cloned TG pigs can be regulated by the Tet-on/off systems.
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Affiliation(s)
- Yong-Xun Jin
- Department of Animal Science, Chungbuk National University, Cheongju, Republic of Korea
| | - Yubyeol Jeon
- College of Veterinary Medicine, Chungbuk National University, Cheongju, Republic of Korea
| | - Sung-Hyun Lee
- Department of Animal Science, Chungbuk National University, Cheongju, Republic of Korea
| | - Mo-Sun Kwon
- School of Medicine, Catholic University of Daegu, Daegu, Republic of Korea
| | - Teoan Kim
- School of Medicine, Catholic University of Daegu, Daegu, Republic of Korea
| | - Xiang-Shun Cui
- Department of Animal Science, Chungbuk National University, Cheongju, Republic of Korea
| | - Sang-Hwan Hyun
- College of Veterinary Medicine, Chungbuk National University, Cheongju, Republic of Korea
- * E-mail: (NHK); (SHH)
| | - Nam-Hyung Kim
- Department of Animal Science, Chungbuk National University, Cheongju, Republic of Korea
- * E-mail: (NHK); (SHH)
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Lee J, You J, Lee GS, Hyun SH, Lee E. Pig oocytes with a large perivitelline space matured in vitro show greater developmental competence after parthenogenesis and somatic cell nuclear transfer. Mol Reprod Dev 2013; 80:753-62. [DOI: 10.1002/mrd.22205] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2012] [Accepted: 06/05/2013] [Indexed: 01/15/2023]
Affiliation(s)
- Joohyeong Lee
- College of Veterinary Medicine; Kangwon National University; Chuncheon Korea
| | - Jinyoung You
- College of Veterinary Medicine; Kangwon National University; Chuncheon Korea
| | - Geun-Shik Lee
- College of Veterinary Medicine; Kangwon National University; Chuncheon Korea
- Institute of Veterinary Science; Kangwon National University; Chuncheon Korea
| | - Sang-Hwan Hyun
- College of Veterinary Medicine; Chungbuk National University; Cheongju Korea
| | - Eunsong Lee
- College of Veterinary Medicine; Kangwon National University; Chuncheon Korea
- Institute of Veterinary Science; Kangwon National University; Chuncheon Korea
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Kwak SS, Cheong SA, Yoon JD, Jeon Y, Hyun SH. Expression patterns of sirtuin genes in porcine preimplantation embryos and effects of sirtuin inhibitors on in vitro embryonic development after parthenogenetic activation and in vitro fertilization. Theriogenology 2013; 78:1597-610. [PMID: 22980088 DOI: 10.1016/j.theriogenology.2012.07.006] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2012] [Revised: 07/06/2012] [Accepted: 07/06/2012] [Indexed: 02/02/2023]
Abstract
We examined the expression patterns of porcine sirtuin 1 to 3 (Sirt1-3) genes in preimplantation embryos derived from parthenogenetic activation (PA), in vitro fertilization (IVF) and somatic cell nuclear transfer (SCNT). We also investigated the effects of sirtuin inhibitors (5 mM nicotinamide [NAM] and 100 μM sirtinol) on embryonic development of PA and IVF embryos under in vitro culture (IVC). The expression patterns of Sirt1-3 mRNA in preimplantation embryos of PA, IVF, and SCNT were significantly (P < 0.05) decreased from metaphase stage of oocyte to blastocyst stage. Especially, the expressions of Sirt1-3 in SCNT blastocysts were significantly (P < 0.05) lower and Sirt2 in PA blastocyst was significantly higher compared with the IVF blastocysts. Treatment with sirtuin inhibitors during IVC resulted in significantly (P < 0.05) decreased blastocyst formation and total cell number of blastocyst derived from PA (NAM: 29.4% and 29.6, sirtinol: 31.0% and 30.3, and control: 40.9% and 41.7, respectively) and IVF embryos (NAM: 10.4% and 30.9, sirtinol: 6.3% and 30.5, and control: 16.7% and 42.8, respectively). There was no significant difference in cleavage rate in both PA and IVF embryos. The early and expanded blastocyst formations at Day 7 were significantly lower in the sirtuin inhibitors-treated groups than the control. It was demonstrated that sirtuin inhibitor (NAM) influenced the percentage of blastocyst formation and total cell number of PA derived blastocyst when NAM was added during day 4 to 7 (22.1% and 32.4) or day 0 to 7 (23.1% and 31.6) of IVC compared with the control (41.8% and 41.5). No significant difference in cleavage rates appeared among the groups. The blastocysts derived from PA embryos treated with sirtuin inhibitors showed lower (P < 0.05) expressions of POU5F1 and Cdx2 genes. Also, Sirt2 mRNA expression was significantly decreased in sirtinol treated group and Sirt3 mRNA expression was also significantly decreased in both NAM and sirtinol treated groups compared with the control. In conclusion, these results suggest that sirtuins may have a physiological and important role in embryonic development of porcine preimplantation embryos by regulating essential gene expressions of developing embryos. These findings could have implications for understanding the role of sirtuins during embryo development and for improving SCNT and related techniques.
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Affiliation(s)
- Seong-Sung Kwak
- Laboratory of Veterinary Embryology and Biotechnology, College of Veterinary Medicine, Chungbuk National University, Chungbuk, South Korea
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18
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Park CH, Jeong YH, Jeong YI, Lee SY, Jeong YW, Shin T, Kim NH, Jeung EB, Hyun SH, Lee CK, Lee E, Hwang WS. X-linked gene transcription patterns in female and male in vivo, in vitro and cloned porcine individual blastocysts. PLoS One 2012; 7:e51398. [PMID: 23236494 PMCID: PMC3517569 DOI: 10.1371/journal.pone.0051398] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2012] [Accepted: 10/31/2012] [Indexed: 11/18/2022] Open
Abstract
To determine the presence of sexual dimorphic transcription and how in vitro culture environments influence X-linked gene transcription patterns in preimplantation embryos, we analyzed mRNA expression levels in in vivo-derived, in vitro-fertilized (IVF), and cloned porcine blastocysts. Our results clearly show that sex-biased expression occurred between female and male in vivo blastocysts in X-linked genes. The expression levels of XIST, G6PD, HPRT1, PGK1, and BEX1 were significantly higher in female than in male blastocysts, but ZXDA displayed higher levels in male than in female blastocysts. Although we found aberrant expression patterns for several genes in IVF and cloned blastocysts, similar sex-biased expression patterns (on average) were observed between the sexes. The transcript levels of BEX1 and XIST were upregulated and PGK1 was downregulated in both IVF and cloned blastocysts compared with in vivo counterparts. Moreover, a remarkable degree of expression heterogeneity was observed among individual cloned embryos (the level of heterogeneity was similar in both sexes) but only a small proportion of female IVF embryos exhibited variability, indicating that this phenomenon may be primarily caused by faulty reprogramming by the somatic cell nuclear transfer (SCNT) process rather than in vitro conditions. Aberrant expression patterns in cloned embryos of both sexes were not ameliorated by treatment with Scriptaid as a potent HDACi, although the blastocyst rate increased remarkably after this treatment. Taken together, these results indicate that female and male porcine blastocysts produced in vivo and in vitro transcriptional sexual dimorphisms in the selected X-linked genes and compensation of X-linked gene dosage may not occur at the blastocyst stage. Moreover, altered X-linked gene expression frequently occurred in porcine IVF and cloned embryos, indicating that X-linked gene regulation is susceptible to in vitro culture and the SCNT process, which may eventually lead to problems with embryonic or placental defects.
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Affiliation(s)
- Chi-Hun Park
- Sooam Biotech Research Foundation, Seoul, Republic of Korea
| | | | - Yeun-Ik Jeong
- Sooam Biotech Research Foundation, Seoul, Republic of Korea
| | - Se-Yeong Lee
- Sooam Biotech Research Foundation, Seoul, Republic of Korea
| | - Yeon-Woo Jeong
- Sooam Biotech Research Foundation, Seoul, Republic of Korea
| | - Taeyoung Shin
- Sooam Biotech Research Foundation, Seoul, Republic of Korea
| | - Nam-Hyung Kim
- Department of Animal Sciences, Chungbuk National University, Cheongju, Republic of Korea
| | - Eui-Bae Jeung
- College of Veterinary Medicine, Chungbuk National University, Cheongju, Republic of Korea
| | - Sang-Hwan Hyun
- College of Veterinary Medicine, Chungbuk National University, Cheongju, Republic of Korea
| | - Chang-Kyu Lee
- Department of Agricultural Biotechnology, Animal Biotechnology Major, and Research Institute for Agriculture and Life Science, Seoul National University, Seoul, Republic of Korea
| | - Eunsong Lee
- College of Veterinary Medicine and Institute of Veterinary Science, Kangwon National University, Chunchon, Republic of Korea
| | - Woo Suk Hwang
- Sooam Biotech Research Foundation, Seoul, Republic of Korea
- * E-mail:
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Wan YJ, Zhang YL, Zhou ZR, Jia RX, Li M, Song H, Wang ZY, Wang LZ, Zhang GM, You JH, Wang F. Efficiency of donor cell preparation and recipient oocyte source for production of transgenic cloned dairy goats harboring human lactoferrin. Theriogenology 2012; 78:583-92. [DOI: 10.1016/j.theriogenology.2012.03.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2011] [Revised: 03/07/2012] [Accepted: 03/07/2012] [Indexed: 12/01/2022]
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L-carnitine treatment during oocyte maturation improves in vitro development of cloned pig embryos by influencing intracellular glutathione synthesis and embryonic gene expression. Theriogenology 2012; 78:235-43. [DOI: 10.1016/j.theriogenology.2012.02.027] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2011] [Revised: 01/03/2012] [Accepted: 02/15/2012] [Indexed: 11/22/2022]
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21
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Kwak SS, Cheong SA, Jeon Y, Hyun SH. Porcine granulocyte-macrophage colony-stimulating factor improves the in vitro development of cloned porcine embryos. J Vet Med Sci 2012; 74:1095-102. [PMID: 22531103 DOI: 10.1292/jvms.12-0050] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
We examined the effects of porcine granulocyte-macrophage colony-stimulating factor (pGM-CSF) on the in vitro development of porcine embryos produced by somatic cell nuclear transfer (SCNT) for the first time. We evaluated the effects of pGM-CSF on SCNT-derived blastocyst formation and investigated gene expression. A total of 522 cloned embryos in 6 replicates were treated with 10 ng/ml pGM-CSF during in vitro culture (IVC). This treatment significantly (P<0.05) increased blastocyst formation and total cell number in blastocysts compared with the control (12.3% and 41.4 vs. 9.0% and 34.7, respectively). However, there was no effect on cleavage rate. The numbers of cells in the inner cell mass and trophectoderm were significantly higher in the pGM-CSF treatment group (6.0 and 43.0, respectively) compared with the control (4.4 and 31.9, respectively). Treatment with 10 ng/ml pGM-CSF significantly increased POU5F1 and Cdx2 mRNA expression in blastocysts. In addition, Bcl-2, Dnmt1 and proliferating cell nuclear antigen (PCNA) mRNA expression were upregulated in blastocysts in the pGM-CSF supplemented group compared with the control. These results suggest that pGM-CSF improves the quality and developmental viability of porcine SCNT embryos by regulating transcription factor expression.
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Affiliation(s)
- Seong-Sung Kwak
- Laboratory of Veterinary Embryology and Biotechnology, College of Veterinary Medicine, Chungbuk National University, Cheongju 361-763, Republic of Korea
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22
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Himaki T, Mizobe Y, Tsuda K, Suetomo M, Yamakuchi H, Miyoshi K, Takao S, Yoshida M. Effect of postactivation treatment with latrunculin A on in vitro and in vivo development of cloned embryos derived from kidney fibroblasts of an aged Clawn miniature boar. J Reprod Dev 2012; 58:398-403. [PMID: 22498812 DOI: 10.1262/jrd.11-083a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The objective of this study was to examine the effect of postactivation treatment with latrunculin A (LatA), an actin polymerization inhibitor, on in vitro and in vivo development of somatic cell nuclear transfer (SCNT) embryos derived from kidney fibroblasts of an aged Clawn miniature boar (12 years old). After electric activation, SCNT embryos were treated with 0, 0.5 or 1 μM LatA and cultured in vitro. The rate of blastocyst formation was significantly higher (P<0.05) in SCNT embryos treated with 0.5 μM LatA (38%) than those in control (14%). When cloned embryos treated with 0.5 μM LatA were transferred into the oviducts of two recipient miniature gilts to assess their development in vivo, both recipients became pregnant; one maintained pregnancy to term, and a live piglet (weighing 220 g) was delivered by Caesarean section. The results of this study indicated that the postactivation treatment with LatA was effective in improving in vitro developmental capacity of SCNT miniature pig embryos derived from kidney fibroblasts of an aged animal and that miniature pig cloned embryos treated with LatA had the ability to develop to term.
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Affiliation(s)
- Takehiro Himaki
- Laboratory of Animal Reproduction, Faculty of Agriculture, Kagoshima University, Kagoshima 890-0065, Japan
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You J, Kim J, Lee H, Hyun SH, Hansen PJ, Lee E. MG132 treatment during oocyte maturation improves embryonic development after somatic cell nuclear transfer and alters oocyte and embryo transcript abundance in pigs. Mol Reprod Dev 2011; 79:41-50. [PMID: 22083810 DOI: 10.1002/mrd.21402] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2011] [Accepted: 10/05/2011] [Indexed: 11/08/2022]
Abstract
The objective of this study was to examine the effect of treating pig oocytes during in vitro maturation (IVM) with a proteasome inhibitor, MG132, on oocyte maturation and embryonic development. In one series of experiments, oocytes from medium-sized follicles (3-8 mm in diameter) were untreated (MCO) or treated with MG132 during 0-22 hr (M0-22) or 30-42 hr (M30-42) of IVM. There was no significant effect of MG132 on nuclear maturation or cytoplasmic maturation (as assessed by intracellular amounts of glutathione and p34cdc2 kinase activity). Blastocyst formation after parthenogenetic activation (PA) and somatic cell nuclear transfer (SCNT), however, was increased for M30-42 (65.2% and 27.7% for PA and SCNT, respectively) compared to MCO (42.6% and 13.6%, respectively) and M0-22 (45.3% and 19.5%, respectively; P<0.05). Expression of PCNA and ERK2 was increased in M30-42 for IVM oocytes while transcript abundance for POUF51, DNMT1, FGFR2, and PCNA was increased in M30-42 for 4-cell SCNT embryos. When oocytes derived from small follicles (<3 mm in diameter) were untreated (SCO) or treated with MG132 during 0-22 hr (S0-22), 30-42 hr (S30-42) of IVM, or 0-22 and 30-42 hr of IVM (S0-22/30-42), expression of POU5F1, DNMT1, FGFR2, and PCNA and blastocyst formation were increased for SCNT embryos derived from S30 to 42 (16.5%) and S0-22/30-42 oocytes (20.8%) as compared to embryos from SCO (8.7%) or S0-22 oocytes (8.8%; P<0.05). Results demonstrate that treatment of oocytes with MG132 during the later stage of IVM improves embryonic development and alters gene expression in pigs.
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Affiliation(s)
- Jinyoung You
- College of Veterinary Medicine, Kangwon National University, Chuncheon, Korea
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Liu J, Li LL, Du S, Bai XY, Zhang HD, Tang S, Zhao MT, Ma BH, Quan FS, Zhao XE, Zhang Y. Effects of interval between fusion and activation, cytochalasin B treatment, and number of transferred embryos, on cloning efficiency in goats. Theriogenology 2011; 76:1076-83. [PMID: 21752443 DOI: 10.1016/j.theriogenology.2011.05.013] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2010] [Revised: 05/03/2011] [Accepted: 05/03/2011] [Indexed: 11/15/2022]
Abstract
To improve the efficiency of somatic cell nuclear transfer (SCNT) in goats, we evaluated the effects of the interval between fusion and activation (1 to 5 h), cytochalasin B (CB) treatment after electrofusion, and the number of transferred embryos on the in vivo and in vitro development of cloned caprine embryos. The majority of the reconstructed embryos had condensed chromosomes and metaphase-like chromosomes at 2 and 3 h after fusion; cleavage and blastocyst rates from those two groups were higher (P < 0.05) than those of embryos activated 1, 4, or 5 h after fusion. Treatment with CB between fusion and activation improved in vitro and in vivo development of nuclear transfer (NT) goat embryos by reducing the fragmentation rate (P < 0.05). Although there were no significant differences in NT efficiency, pregnancy rate and kids born per recipient were increased by transfer of 20 or 30 embryos per recipient compared with 10 embryos. We concluded that CB treatment for 2 to 3 h between fusion and activation was an efficient method for generating cloned goats by somatic cell NT. In addition, increasing the number of embryos transferred to each recipient resulted in more live offspring from fewer recipients.
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Affiliation(s)
- J Liu
- Key Laboratory of Animal Reproductive Physiology and Embryo Technology of the Ministry of Agriculture, College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi Province, China
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You J, Song K, Lee E. Prolonged interval between fusion and activation impairs embryonic development by inducing chromosome scattering and nuclear aneuploidy in pig somatic cell nuclear transfer. Reprod Fertil Dev 2010; 22:977-86. [PMID: 20591332 DOI: 10.1071/rd09309] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2009] [Accepted: 01/27/2010] [Indexed: 11/23/2022] Open
Abstract
The aim of the present study was to examine the effect of various intervals between electrofusion and activation (FA interval) on the nuclear remodelling and development of somatic cell nuclear transfer (SCNT) embryos in pigs. Reconstructed oocytes were activated at 0 (simultaneous fusion and activation; SFA), 1, 2 and 3 h (delayed activation) after electrofusion; these groups were designated as DA1, DA2 and DA3, respectively. When oocyte nuclear status was examined at 0.5, 1, 2 and 3 h after electrofusion, the incidence of chromosome scattering was increased (P < 0.01) as the FA interval was extended (0.0%, 12.0%, 77.3% and 78.0%, respectively). Extending the FA interval led to an increase (P < 0.01) in the percentage of oocytes containing multiple (>or=3) pseudopronuclei (PPN) (0.0% of SFA; 5.3% of DA1; 21.7% of DA2; and 33.5% of DA3). The development of SCNT embryos to the blastocyst stage was decreased (P < 0.05) in DA2 (5.7%) and DA3 (5.0%) compared with SFA (18.1%) and DA1 (19.5%). Our results demonstrate that extending the FA interval impairs the development of SCNT pig embryos by inducing chromosome scattering and the formation of multiple PPN, which may result in increased nuclear aneuploidy.
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Affiliation(s)
- Jinyoung You
- College of Veterinary Medicine, Kangwon National University, Chuncheon, Korea
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You J, Kim J, Lim J, Lee E. Anthocyanin stimulates in vitro development of cloned pig embryos by increasing the intracellular glutathione level and inhibiting reactive oxygen species. Theriogenology 2010; 74:777-85. [DOI: 10.1016/j.theriogenology.2010.04.002] [Citation(s) in RCA: 92] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2010] [Revised: 04/02/2010] [Accepted: 04/04/2010] [Indexed: 01/01/2023]
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You J, Lee J, Kim J, Park J, Lee E. Post-fusion treatment with MG132 increases transcription factor expression in somatic cell nuclear transfer embryos in pigs. Mol Reprod Dev 2010; 77:149-57. [PMID: 19813265 DOI: 10.1002/mrd.21115] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The objective of this study was to examine the effect of post-fusion treatment of somatic cell nuclear transfer (SCNT) oocytes with the proteasomal inhibitor MG132 on maturation promoting factor (MPF) activity, nuclear remodeling, embryonic development, and gene expression of cloned pig embryos. Immediately after electrofusion, SCNT oocytes were treated with MG132 and/or caffeine for 2 hr, vanadate for 0.5 hr, or vanadate for 0.5 hr followed by MG132 for 1.5 hr. Of the MG132 concentrations tested (0-5 microM), the 1 microM concentration showed a higher rate of blastocyst formation (25.9%) than 0 (14.2%), 0.5 (16.9%), and 5 microM (16.9%). Post-fusion treatment with MG132, caffeine, and both MG132 and caffeine improved blastocyst formation (22.1%, 21.4%, and 24.4%, respectively), whereas vanadate treatment inhibited blastocyst formation (6.5%) compared to the control (11.1%). When examined 2 hr after fusion and 1 hr after activation, MPF activity remained at a higher (P < 0.05) level in SCNT oocytes that were treated post-fusion with caffeine and/or MG132, but it was decreased by vanadate. The rate of oocytes showing premature chromosome condensation was not altered by MG132 but was decreased by vanadate treatment. In addition, formation of single pronuclei was increased by MG132 compared to control and vanadate treatment. MG132-treated embryos showed increased expression of POU5F1, DPPA2, DPPA3, DPPA5, and NDP52l1 genes compared to control embryos. Our results demonstrate that post-fusion treatment of SCNT oocytes with MG132 prevents MPF degradation and increases expression of transcription factors in SCNT embryos, which are necessary for normal development of SCNT embryos.
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Affiliation(s)
- Jinyoung You
- School of Veterinary Medicine, Kangwon National University, Chunchon, Korea
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Postactivation treatment with nocodazole maintains normal nuclear ploidy of cloned pig embryos by increasing nuclear retention and formation of single pronucleus. Theriogenology 2010; 73:429-36. [DOI: 10.1016/j.theriogenology.2009.09.026] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2009] [Revised: 08/04/2009] [Accepted: 09/30/2009] [Indexed: 11/22/2022]
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Lee E, Bhuiyan MM, Watanabe H, Matsuoka K, Fujise Y, Ishikawa H, Fukui Y. Production of cloned sei whale (Balaenoptera borealis) embryos by interspecies somatic cell nuclear transfer using enucleated pig oocytes. J Vet Sci 2010; 10:285-92. [PMID: 19934592 PMCID: PMC2807263 DOI: 10.4142/jvs.2009.10.4.285] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
In this study, we examined the feasibility of using subzonal cell injection with electrofusion for interspecies somatic cell nuclear transfer (iSCNT) to produce sei whale embryos and to improve their developmental capacity by investigating the effect of osmolarity and macromolecules in the culture medium on the in vitro developmental capacity. Hybrid embryos produced by the electrofusion of fetal whale fibroblasts with enucleated porcine oocytes were cultured in modified porcine zygote medium-3 to examine the effects of osmolarity and fetal serum on their in vitro developmental capacity. More than 66% of the whale somatic cells successfully fused with the porcine oocytes following electrofusion. A portion (60~81%) of the iSCNT whale embryos developed to the two- to four-cell stages, but no embryos were able to reach the blastocyst stage. This developmental arrest was not overcome by increasing the osmolarity of the medium to 360 mOsm or by the addition of fetal bovine or fetal whale serum. Our results demonstrate that sei whale-porcine hybrid embryos may be produced by SCNT using subzonal injection and electrofusion. The pig oocytes partly supported the remodeling and reprogramming of the sei whale somatic cell nuclei, but they were unable to support the development of iSCNT whale embryos to the blastocyst stage.
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Affiliation(s)
- Eunsong Lee
- School of Veterinary Medicine and Institute of Veterinary Science, Kangwon National University, Chunchon 200-701, Korea
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Kim J, You J, Hyun SH, Lee G, Lim J, Lee E. Developmental competence of morphologically poor oocytes in relation to follicular size and oocyte diameter in the pig. Mol Reprod Dev 2009; 77:330-9. [DOI: 10.1002/mrd.21148] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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