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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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Blackburn HD, Azevedo HC, Purdy PH. Incorporation of Biotechnologies into Gene Banking Strategies to Facilitate Rapid Reconstitution of Populations. Animals (Basel) 2023; 13:3169. [PMID: 37893893 PMCID: PMC10603745 DOI: 10.3390/ani13203169] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 10/05/2023] [Accepted: 10/09/2023] [Indexed: 10/29/2023] Open
Abstract
National animal gene banks that are responsible for conserving livestock, poultry, and aquatic genetic resources need to be capable of utilizing a broad array of cryotechnologies coupled with assisted reproductive technologies to reconstitute either specific animals or populations/breeds as needed. This capability is predicated upon having sufficient genetic diversity (usually encapsulated by number of animals in the collection), units of germplasm or tissues, and the ability to reconstitute animals. While the Food and Agriculture Organization of the United Nations (FAO 2012, 2023) developed a set of guidelines for gene banks on these matters, those guidelines do not consider applications and utilization of newer technologies (e.g., primordial germ cells, cloning from somatic cells, embryo transfer, IVF, sex-sorted semen), which can radically change how gene banks collect, store, and utilize genetic resources. This paper reviews the current status of using newer technologies, explores how gene banks might make such technologies part of their routine operations, and illustrates how combining newer assisted reproductive technologies with older approaches enables populations to be reconstituted more efficiently.
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Affiliation(s)
- Harvey D. Blackburn
- USDA ARS National Animal Germplasm Program, 1111 S. Mason St., Fort Collins, CO 80521-4500, USA
| | | | - Phillip H. Purdy
- USDA ARS National Animal Germplasm Program, 1111 S. Mason St., Fort Collins, CO 80521-4500, USA
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3
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Shi J, Xiao L, Tan B, Luo L, Li Z, Hong L, Yang J, Cai G, Zheng E, Wu Z, Gu T. Comparative evaluation of production performances of cloned pigs derived from superior Duroc boars. Anim Reprod Sci 2022; 244:107049. [DOI: 10.1016/j.anireprosci.2022.107049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 07/22/2022] [Accepted: 07/26/2022] [Indexed: 11/17/2022]
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4
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Rim CS, Kim YS, Rim CH, Ri YJ, Choe JS, Kim DS, Kim GS, Il Ri J, Kim RC, Chen H, Xiao L, Fu Z, Pak YJ, Jong UM. Effect of roscovitine pretreatment for increased utilization of small follicle-derived oocytes on developmental competence of somatic cell nuclear transfer embryos in pigs. Anim Reprod Sci 2022; 241:106987. [DOI: 10.1016/j.anireprosci.2022.106987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 04/23/2022] [Accepted: 05/01/2022] [Indexed: 11/25/2022]
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Shi J, Tan B, Luo L, Li Z, Hong L, Yang J, Cai G, Zheng E, Wu Z, Gu T. Assessment of the Growth and Reproductive Performance of Cloned Pietrain Boars. Animals (Basel) 2020; 10:E2053. [PMID: 33171943 PMCID: PMC7694642 DOI: 10.3390/ani10112053] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 10/31/2020] [Accepted: 11/05/2020] [Indexed: 12/15/2022] Open
Abstract
How to maximize the use of the genetic merits of the high-ranking boars (also called superior ones) is a considerable question in the pig breeding industry, considering the money and time spent on selection. Somatic cell nuclear transfer (SCNT) is one of the potential ways to answer the question, which can be applied to produce clones with genetic resources of superior boar for the production of commercial pigs. For practical application, it is essential to investigate whether the clones and their progeny keep behaving better than the "normal boars", considering that in vitro culture and transfer manipulation would cause a series of harmful effects to the development of clones. In this study, 59,061 cloned embryos were transferred into 250 recipient sows to produce the clones of superior Pietrain boars. The growth performance of 12 clones and 36 non-clones and the semen quality of 19 clones and 28 non-clones were compared. The reproductive performance of 21 clones and 25 non-clones were also tested. Furthermore, we made a comparison in the growth performance between 466 progeny of the clones and 822 progeny of the non-clones. Our results showed that no significant difference in semen quality and reproductive performance was observed between the clones and the non-clones, although the clones grew slower and exhibited smaller body size than the non-clones. The F1 progeny of the clones showed a greater growth rate than the non-clones. Our results demonstrated through the large animal population showed that SCNT manipulation resulted in a low growth rate and small body size, but the clones could normally produce F1 progeny with excellent growth traits to bring more economic benefits. Therefore, SCNT could be effective in enlarging the merit genetics of the superior boars and increasing the economic benefits in pig reproduction and breeding.
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Affiliation(s)
- Junsong Shi
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou 510642, China; (J.S.); (B.T.); (Z.L.); (L.H.); (J.Y.); (G.C.); (E.Z.)
- Guangdong Wens Breeding Swine Technology Co., Ltd., Yunfu 527300, China;
| | - Baohua Tan
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou 510642, China; (J.S.); (B.T.); (Z.L.); (L.H.); (J.Y.); (G.C.); (E.Z.)
| | - Lvhua Luo
- Guangdong Wens Breeding Swine Technology Co., Ltd., Yunfu 527300, China;
| | - Zicong Li
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou 510642, China; (J.S.); (B.T.); (Z.L.); (L.H.); (J.Y.); (G.C.); (E.Z.)
| | - Linjun Hong
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou 510642, China; (J.S.); (B.T.); (Z.L.); (L.H.); (J.Y.); (G.C.); (E.Z.)
| | - Jie Yang
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou 510642, China; (J.S.); (B.T.); (Z.L.); (L.H.); (J.Y.); (G.C.); (E.Z.)
| | - Gengyuan Cai
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou 510642, China; (J.S.); (B.T.); (Z.L.); (L.H.); (J.Y.); (G.C.); (E.Z.)
- Guangdong Wens Breeding Swine Technology Co., Ltd., Yunfu 527300, China;
| | - Enqin Zheng
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou 510642, China; (J.S.); (B.T.); (Z.L.); (L.H.); (J.Y.); (G.C.); (E.Z.)
| | - Zhenfang Wu
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou 510642, China; (J.S.); (B.T.); (Z.L.); (L.H.); (J.Y.); (G.C.); (E.Z.)
- Guangdong Wens Breeding Swine Technology Co., Ltd., Yunfu 527300, China;
| | - Ting Gu
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou 510642, China; (J.S.); (B.T.); (Z.L.); (L.H.); (J.Y.); (G.C.); (E.Z.)
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Xu W, Li H, Zhang M, Shi J, Wang Z. Locus-specific analysis of DNA methylation patterns in cloned and in vitro fertilized porcine embryos. J Reprod Dev 2020; 66:505-514. [PMID: 32908081 PMCID: PMC7768172 DOI: 10.1262/jrd.2019-076] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Porcine somatic cell nuclear transfer (SCNT) is currently inefficient, as 1–3.95% of reconstructed embryos survive to term; inadequate or erroneous epigenetic
reprogramming of the specialized donor somatic nucleus could be a primary reason. Therefore, a locus-specific analysis of DNA methylation dynamics in
embryogenesis and the DNA methylation status of gametes and donor cells used for SCNT were conducted in the following developmentally important gene loci:
POU5F1, NANOG, SOX2, H19, IGF2, IGF2R,
XIST; and the retrotransposon LINE-1. There were significant epigenetic differences between the gametes and the somatic
donor cells. Three gamete-specific differentially methylated regions (DMRs) in POU5F1, XIST, and LINE-1 were
identified. A delayed demethylation process at POU5F1 and LINE-1 loci occurred after three successive cleavages, compared to
the in vitro fertilized (IVF) embryos. Although cloned embryos could undergo de-methylation and re-methylation dynamics at the DMRs of
imprinted genes (H19,IGF2R, and XIST), the re-methylation process was compromised, unlike in fertilized
embryos. LINE-1 loci are widely dispersed across the whole genome, and LINE-1 DMR might be a potential porcine nuclear
reprogramming epi-marker. Data from observations in our present and previous studies, and two published articles were pooled to produce a schematic diagram of
locus-specific, DNA methylation dynamics of cloned and IVF embryos during porcine early embryogenesis. This also indicated aberrant DNA methylation
reprogramming events, including inadequate DNA demethylation and insufficient re-methylation in cloned embryos. Further research should focus on mechanisms
underlying demethylation during the early cleavage of embryos and de novo DNA methylation at the blastocyst stage.
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Affiliation(s)
- Weihua Xu
- Fujian Provincial Key Laboratory for the Prevention and Control of Animal Infectious Diseases and Biotechnology, College of Life Sciences, Longyan University, Longyan 364012, P. R. China.,Provincial Key Laboratory for Developmental Biology and Neurosciences, College of Life Sciences, Key Laboratory of Opto-Electronic Science and Technology for Medicine of Ministry of Education, Fujian Normal University, Fuzhou 350007, P. R. China
| | - Hongyi Li
- Fujian Provincial Key Laboratory for the Prevention and Control of Animal Infectious Diseases and Biotechnology, College of Life Sciences, Longyan University, Longyan 364012, P. R. China
| | - Mao Zhang
- Fujian Provincial Key Laboratory for the Prevention and Control of Animal Infectious Diseases and Biotechnology, College of Life Sciences, Longyan University, Longyan 364012, P. R. China
| | - Junsong Shi
- Guangdong Provincial Wen's Research Institute, Yunfu 527400, P. R. China
| | - Zhengchao Wang
- Provincial Key Laboratory for Developmental Biology and Neurosciences, College of Life Sciences, Key Laboratory of Opto-Electronic Science and Technology for Medicine of Ministry of Education, Fujian Normal University, Fuzhou 350007, P. R. China
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Study on Hematological and Biochemical Characters of Cloned Duroc Pigs and Their Progeny. Animals (Basel) 2019; 9:ani9110912. [PMID: 31684083 PMCID: PMC6912288 DOI: 10.3390/ani9110912] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Accepted: 10/25/2019] [Indexed: 12/14/2022] Open
Abstract
Simple Summary Cloning is the most promising technique for passing the excellent phenotypes of the best individuals in the population. Here we studied the effects of cloning on Duroc pig, which is the most popular sire used in pig production due to its good growth and meat quality. Understanding the changes of cloned Duroc pigs and their progenies is of great importance for animal breeding and public acceptance. The results of this study suggested that there were no difference in blood parameters between the cloned Duroc and the conventionally bred Duroc and their progenies. Abstract To increase public understanding in cloned animals produced by somatic cell nuclear transfer technology, our previous study investigated the carcass trait and meat quality of the clones (paper accepted), and this study we further evaluate differences by investigating the blood parameters in cloned pigs and their progeny. We collected blood samples from the clones and conventionally bred non-clones and their progeny, and investigated their hematological and blood biochemical characters. Our results supported the hypothesis that there was no significant difference between clones and non-clones, or their progeny. Taken together, the data demonstrated that the clones or their progeny were similar with their controls in terms of blood parameters, although there were still other kinds of disorders, such as abnormal DNA methylation or histone modifications that needs further investigation. The data in this study agreed that cloning technique could be used to preserve and enlarge the genetics of the superior boars in pig breeding industry, especially in facing of the deadly threat of African Swine fever happened in China.
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Yang X, Wu X, Yang Y, Gu T, Hong L, Zheng E, Xu Z, Zeng F, Shi J, Zhou R, Cai G, Wu Z, Li Z. Improvement of developmental competence of cloned male pig embryos by short hairpin ribonucleic acid (shRNA) vector-based but not small interfering RNA (siRNA)-mediated RNA interference (RNAi) of Xist expression. J Reprod Dev 2019; 65:533-539. [PMID: 31631092 PMCID: PMC6923154 DOI: 10.1262/jrd.2019-070] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Xist is an X-linked ribonucleic acid (RNA) gene responsible for the cis induction of X chromosome inactivation (XCI). In cloned mammalian embryos, Xist is
ectopically activated at the morula to blastocyst stage on the X chromosome that is supposed to be active, thus resulting in abnormal XCI. Suppression of erroneous Xist
expression by injecting small interfering RNA (siRNA) remarkably increased the developmental efficiency of cloned male mouse embryos by approximately 10-fold. However, injection of
anti-Xist siRNA resulted in only a slight increase in the developmental ability of injected cloned male pig embryos because the blocking effect of the injected siRNA was
not maintained beyond the morula stage, which is 5 days post-activation. To develop a more effective approach for suppressing the ectopic expression of Xist in cloned pig
embryos, we compared the silencing effect of short hairpin RNA (shRNA) and siRNA on Xist expression and the effects of these two Xist knockdown methods on
the developmental competence of cloned male pig embryos. Results indicated that an shRNA-based RNA interference (RNAi) has a longer blocking effect on Xist expression than
an siRNA-mediated RNAi. Injection of anti-Xist shRNA plasmid into two-cell-stage cloned male pig embryos effectively suppressed Xist expression, rescued XCI
at the blastocyst stage, and improved the in vitro developmental ability of injected cloned embryos. These positive effects, however, were not observed in cloned male pig
embryos injected with anti-Xist siRNA. This study demonstrates that vector-based rather than siRNA-mediated RNAi of Xist expression can be employed to
improve pig cloning efficiency.
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Affiliation(s)
- Xuqiong Yang
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou 510642, Guangdong, China.,Guangdong Provincial Key Laboratory of Agro-animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou 510642, Guangdong, China
| | - Xiao Wu
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou 510642, Guangdong, China.,Guangdong Provincial Key Laboratory of Agro-animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou 510642, Guangdong, China
| | - Yang Yang
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou 510642, Guangdong, China.,Guangdong Provincial Key Laboratory of Agro-animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou 510642, Guangdong, China
| | - Ting Gu
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou 510642, Guangdong, China.,Guangdong Provincial Key Laboratory of Agro-animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou 510642, Guangdong, China
| | - Linjun Hong
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou 510642, Guangdong, China.,Guangdong Provincial Key Laboratory of Agro-animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou 510642, Guangdong, China
| | - Enqin Zheng
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou 510642, Guangdong, China.,Guangdong Provincial Key Laboratory of Agro-animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou 510642, Guangdong, China
| | - Zheng Xu
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou 510642, Guangdong, China.,Guangdong Provincial Key Laboratory of Agro-animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou 510642, Guangdong, China
| | - Fang Zeng
- College of Marine Sciences, South China Agricultural University, Guangzhou 510642, Guangdong, China
| | - Junsong Shi
- Guangdong Wens Pig Breeding Technology Co., Ltd., Wens Foodstuff Group Co., Ltd., Yunfu 527400, Guangdong, China
| | - Rong Zhou
- Guangdong Wens Pig Breeding Technology Co., Ltd., Wens Foodstuff Group Co., Ltd., Yunfu 527400, Guangdong, China
| | - Gengyuan Cai
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou 510642, Guangdong, China.,Guangdong Provincial Key Laboratory of Agro-animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou 510642, Guangdong, China
| | - Zhenfang Wu
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou 510642, Guangdong, China.,Guangdong Provincial Key Laboratory of Agro-animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou 510642, Guangdong, China
| | - Zicong Li
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou 510642, Guangdong, China.,Guangdong Provincial Key Laboratory of Agro-animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou 510642, Guangdong, China
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9
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Lopukhov AV, Singina GN, Zinovieva NA. Biotechnological bases of the development of cloned pig embryos. Vavilovskii Zhurnal Genet Selektsii 2019. [DOI: 10.18699/vj19.521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
The term ‘clone’ in animal biotechnology refers to an organism derived from non-sexual reproduction, which is both a direct offspring and a genetic copy of the parent organism. To date, the pig appears to be the most interesting object in cloning research. Somatic cell nuclear transfer in pigs has a wide range of potential applications in various fields of human scientific and economic activities. However, the efficiency of producing cloned embryos in swine is still lower than that of other livestock species, in particular horses and cattle. Somatic cell nuclear transfer is a technically complex multi-stage technology, at each stage of which the pig oocytes, which are more susceptible to changes of surrounding conditions, are affected by various factors (mechanical, physical, chemical). At the stage of oocyte maturation, changes in the cell ultrastructures of the ooplasm occur, which play an important role in the subsequent nuclear reprogramming of the transferred donor cell. Before transfer to the oocyte donor somatic cells are synchronized in the G0/G1 stage of the cell cycle to ensure the normal ploidy of the cloned embryo. When removing the nucleus of pig oocytes maturated in vitro, it is necessary to pay attention to the problem of preserving the viability of cells, which were devoid of their own nuclear material. To perform the reconstruction, a somatic cell is placed, using micro-tools, in the perivitelline space, where the first polar body was previously located, or in the cytoplasm of an enucleated oocyte. The method of manual cloning involves the removal of the oocyte nucleus with subsequent fusion with the donor cell without the use of micromanipulation techniques. The increased sensitivity of oocytes to the environmental conditions causes special requirements for the choice of the system for in vitro culture of cloned pig embryos. In this work, we have reviewed the modern methods used for the production of cloned embryos and identified the technological issues that prevent improving the efficiency of somatic cloning of pigs.
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Affiliation(s)
- A. V. Lopukhov
- Federal Science Center for Animal Husbandry named after Academy Member L.K. Ernst
| | - G. N. Singina
- Federal Science Center for Animal Husbandry named after Academy Member L.K. Ernst
| | - N. A. Zinovieva
- Federal Science Center for Animal Husbandry named after Academy Member L.K. Ernst
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Wang X, Shi J, Cai G, Zheng E, Liu D, Wu Z, Li Z. Overexpression of MBD3 Improves Reprogramming of Cloned Pig Embryos. Cell Reprogram 2019; 21:221-228. [PMID: 31393170 DOI: 10.1089/cell.2019.0008] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Methyl-CpG-binding domain protein 3 (MBD3) is a core component of the nucleosome remodeling and deacetylase (NuRD) complex, which is crucial for pluripotent stem cell differentiation and embryonic development. MBD3 was shown to play important roles in transcription factor-induced somatic cell reprogramming. Expression level of MBD3 was demonstrated to be higher in somatic cell nuclear transfer-generated cloned pig embryos than in fertilization-derived porcine embryos. However, the functions of MBD3 in nuclear transfer-mediated somatic cell reprogramming are unknown. In this study, MBD3 was overexpressed in cloned pig embryos, and the effects of MBD3 overexpression on gene transcription, DNA methylation, and in vitro developmental competence of cloned pig embryos were analyzed. Results indicated that overexpression of MBD3 in cloned pig embryos not only increased blastocyst rate and number of cells per blastocyst but also upregulated mRNA expression levels and decreased the DNA methylation of NANOG, OCT4, and LINE1 genes to the levels close to those in in vivo fertilization-produced pig embryos. These findings suggest that overexpression of MBD3 improves reprogramming of cloned pig embryos.
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Affiliation(s)
- Xingwang Wang
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, China
| | - Junsong Shi
- Guangdong Wen's Breeding Swine Company, Yunfu, Guangdong, China
| | - Gengyuan Cai
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, China
| | - Enqin Zheng
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, China
| | - Dewu Liu
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, China
| | - Zhenfang Wu
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, China
| | - Zicong Li
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, China
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11
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Gómez NA, Ramírez MM, Ruiz-Cortés ZT. PRIMARY FIBROBLAST CELL CYCLE SYNCHRONIZATION AND EFFECTS ON HANDMADE CLONED (HMC) BOVINE EMBRYOS. CIÊNCIA ANIMAL BRASILEIRA 2018. [DOI: 10.1590/1809-6891v19e-48555] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Abstract Spatial and temporal synchrony and compatibility between the receptor oocyte and the donor cell nucleus are necessary for the process of embryo cloning to allow nuclear reprogramming and early embryonic development. The objective of the present study was to evaluate three cell cycle synchronization methods on a primary bovine fibroblast culture for 24, 48, or 72 h. These fibroblasts were used as nuclear donors to evaluate their in vitro developmental potential and the quality of the embryos produced through handmade cloning (HMC). No differences were found between the methods used for fibroblast synchronization in G0/G1 (p > 0.05). Production of clones from fibroblasts in four groups- no treatment at 0 h and using serum restriction SR, high culture confluence HCC, and SR+HCC at 24 h- resulted in high cleavage rates that were not different. Embryo production rates were 37.9%, 29.5%, and 30.9% in the 0h, SR24h, and SR+HHC24h groups, respectively, and 19.3% in the HCC group, which was significantly different from the other three (p < 0.05). There were no differences in the quality parameter among the clones produced with fibroblasts subjected to the different synchronization. Finally, when overall clone production was compared versus parthenotes and IVF embryos, the only difference was between clones and parthenogenetic embryos with zona pellucida (30.2% vs 38.6%). The number of blastomeres from the blastocytes produced through IVF was significantly greater than those from embryos activated parthenogenetically and from clones (117, 80, 75.9, and 67.1, respectively). The evaluation of three synchronization methods at different time points did not demonstrate an increase in the percentage of fibroblasts in the G0/G1 phases of the cell cycle; however, good quality and high cloning rates were obtained, suggesting that it is not always necessary to subject the cells to any synchronization treatments, as they would yield equally good cloning results.
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Li Z, Yue Z, Ao Z, Zhao C, Shi J, Zhao C, Zeng F, Cai G, Zheng E, Yang J, Gu T, Yang H, Hong L, Xu Z, Liu D, Wu Z. Maternal dietary supplementation of arginine increases the ratio of total cloned piglets born to total transferred cloned embryos by improving the pregnancy rate of recipient sows. Anim Reprod Sci 2018; 196:211-218. [PMID: 30115522 DOI: 10.1016/j.anireprosci.2018.08.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2018] [Revised: 06/07/2018] [Accepted: 08/10/2018] [Indexed: 12/13/2022]
Abstract
The extremely low full-term developmental efficiency of cloned pig embryos limits the practical application of pig cloning techniques. Maternal dietary supplementation of the nutritionally important amino acid, arginine, can enhance prenatal developmental rate of in vivo fertilization-derived pig embryos. It was hypothesized that maternal dietary addition of arginine can also improve the developmental capacity of cloned pig embryos. To test this hypothesis, there was a comparison of the reproductive performance between recipient sows fed an L-arginine-supplemented diet (L-Arg group) and those fed the control diet (control group). There was a subsequent comparison of the developmental indexes of cloned piglets farrowed in the L-Arg and control groups of surrogate sows. Dietary supplementation of L-arginine during gestation days 14-75 increased the plasma concentrations of arginine and arginine metabolites, including nitric oxide, spermidine, and putrescine in recipient sows of transferred cloned pig embryos. Although maternal arginine addition did not affect the birth weight and placental development indexes of newborn cloned piglets, it significantly increased the ratio of total cloned piglets born to total transferred cloned pig embryos by increasing the pregnancy rate of recipient sows. The results of this study suggest that nutritional management of recipient sows is an effective approach to improve the developmental rate of cloned pig embryos.
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Affiliation(s)
- Zicong Li
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, 510642, China; Guangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, 510642, China
| | - Zhimin Yue
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, 510642, China; Guangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, 510642, China
| | - Zheng Ao
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, 510642, China; Guangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, 510642, China
| | - Chengfa Zhao
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, 510642, China; Guangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, 510642, China
| | - Junsong Shi
- Guangdong Wen's Breeding Swine Company, Yunfu, Guangdong, 527400, China
| | - Chengcheng Zhao
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, 510642, China; Guangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, 510642, China
| | - Fang Zeng
- College of Marine Science, South China Agricultural University, Guangzhou, 510642, China
| | - Gengyuan Cai
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, 510642, China; Guangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, 510642, China
| | - Enqin Zheng
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, 510642, China; Guangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, 510642, China
| | - Jie Yang
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, 510642, China; Guangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, 510642, China
| | - Ting Gu
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, 510642, China; Guangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, 510642, China
| | - Huaqiang Yang
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, 510642, China; Guangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, 510642, China
| | - Linjun Hong
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, 510642, China; Guangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, 510642, China
| | - Zheng Xu
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, 510642, China; Guangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, 510642, China
| | - Dewu Liu
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, 510642, China; Guangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, 510642, China.
| | - Zhenfang Wu
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, 510642, China; Guangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, 510642, China.
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13
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Ao Z, Liu D, Zhao C, Yue Z, Shi J, Zhou R, Cai G, Zheng E, Li Z, Wu Z. Birth weight, umbilical and placental traits in relation to neonatal loss in cloned pigs. Placenta 2017; 57:94-101. [DOI: 10.1016/j.placenta.2017.06.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 05/23/2017] [Accepted: 06/14/2017] [Indexed: 12/16/2022]
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Yang Y, Wu D, Liu D, Shi J, Zhou R, He X, Quan J, Cai G, Zheng E, Wu Z, Li Z. Mutation of the XIST
gene upregulates expression of X-linked genes but decreases the developmental rates of cloned male porcine embryos. Mol Reprod Dev 2017; 84:525-534. [DOI: 10.1002/mrd.22808] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Accepted: 03/31/2017] [Indexed: 02/03/2023]
Affiliation(s)
- Yang Yang
- National Engineering Research Center for Breeding Swine Industry; College of Animal Science; South China Agricultural University; Guangzhou China
- Guangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular Breeding; College of Animal Science; South China Agricultural University; Guangzhou China
| | - Dan Wu
- National Engineering Research Center for Breeding Swine Industry; College of Animal Science; South China Agricultural University; Guangzhou China
- Guangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular Breeding; College of Animal Science; South China Agricultural University; Guangzhou China
| | - Dewu Liu
- National Engineering Research Center for Breeding Swine Industry; College of Animal Science; South China Agricultural University; Guangzhou China
- Guangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular Breeding; College of Animal Science; South China Agricultural University; Guangzhou China
| | - Junsong Shi
- Guangdong Wen's Foodstuff Group Ltd.; Yunfu Guangdong China
| | - Rong Zhou
- Guangdong Wen's Foodstuff Group Ltd.; Yunfu Guangdong China
| | - Xiaoyan He
- Guangdong Wen's Foodstuff Group Ltd.; Yunfu Guangdong China
| | - Jianping Quan
- National Engineering Research Center for Breeding Swine Industry; College of Animal Science; South China Agricultural University; Guangzhou China
- Guangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular Breeding; College of Animal Science; South China Agricultural University; Guangzhou China
| | - Gengyuan Cai
- National Engineering Research Center for Breeding Swine Industry; College of Animal Science; South China Agricultural University; Guangzhou China
- Guangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular Breeding; College of Animal Science; South China Agricultural University; Guangzhou China
| | - Enqin Zheng
- National Engineering Research Center for Breeding Swine Industry; College of Animal Science; South China Agricultural University; Guangzhou China
- Guangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular Breeding; College of Animal Science; South China Agricultural University; Guangzhou China
| | - Zhenfang Wu
- National Engineering Research Center for Breeding Swine Industry; College of Animal Science; South China Agricultural University; Guangzhou China
- Guangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular Breeding; College of Animal Science; South China Agricultural University; Guangzhou China
| | - Zicong Li
- National Engineering Research Center for Breeding Swine Industry; College of Animal Science; South China Agricultural University; Guangzhou China
- Guangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular Breeding; College of Animal Science; South China Agricultural University; Guangzhou China
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15
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Wang Z, Liu C, Hong R, Yang J, Li H, Li Y, Cao H, Zhang Y, Cao Z. Effect of histone deacetylase inhibitor romidepsin on the in vitrogrowth of foetal fibroblast cells and early development of porcine-cloned embryos. ITALIAN JOURNAL OF ANIMAL SCIENCE 2017. [DOI: 10.1080/1828051x.2016.1277963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Zhangfan Wang
- Anhui Provincial Laboratory of Local Livestock and Poultry, Genetical Resource Conservation and Breeding, College of Animal Science and Technology, Anhui Agricultural University, Hefei, China
| | - Chengxue Liu
- Anhui Provincial Laboratory of Local Livestock and Poultry, Genetical Resource Conservation and Breeding, College of Animal Science and Technology, Anhui Agricultural University, Hefei, China
| | - Renyun Hong
- Anhui Provincial Laboratory of Local Livestock and Poultry, Genetical Resource Conservation and Breeding, College of Animal Science and Technology, Anhui Agricultural University, Hefei, China
| | - Jie Yang
- Anhui Provincial Laboratory of Local Livestock and Poultry, Genetical Resource Conservation and Breeding, College of Animal Science and Technology, Anhui Agricultural University, Hefei, China
| | - Hui Li
- Anhui Provincial Laboratory of Local Livestock and Poultry, Genetical Resource Conservation and Breeding, College of Animal Science and Technology, Anhui Agricultural University, Hefei, China
| | - Yunsheng Li
- Anhui Provincial Laboratory of Local Livestock and Poultry, Genetical Resource Conservation and Breeding, College of Animal Science and Technology, Anhui Agricultural University, Hefei, China
| | - Hongguo Cao
- Anhui Provincial Laboratory of Local Livestock and Poultry, Genetical Resource Conservation and Breeding, College of Animal Science and Technology, Anhui Agricultural University, Hefei, China
| | - Yunhai Zhang
- Anhui Provincial Laboratory of Local Livestock and Poultry, Genetical Resource Conservation and Breeding, College of Animal Science and Technology, Anhui Agricultural University, Hefei, China
| | - Zubing Cao
- Anhui Provincial Laboratory of Local Livestock and Poultry, Genetical Resource Conservation and Breeding, College of Animal Science and Technology, Anhui Agricultural University, Hefei, China
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Santos ML, Borges AA, Neta LBQ, Santos MV, Oliveira MF, Silva AR, Pereira AF. In vitro culture of somatic cells derived from ear tissue of collared peccary (Pecari tajacu Linnaeus, 1758) in medium with different requirements. PESQUISA VETERINARIA BRASILEIRA 2016. [DOI: 10.1590/s0100-736x2016001200010] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
ABSTRACT: The maintenance of metabolic activities during the in vitro culture of somatic cells of wild animals, especially collared peccary (Pecari tajacu), is an interesting step in conservation of these cells for the use in nuclear transfer. In this context, it is necessary to optimize the culture conditions of somatic cells by the establishment of appropriate supplementation to the media. Therefore, this study aimed to analyze the composition of the culture means of somatic cell derived from ear tissue of collared peccaries, evaluating concentrations of fetal bovine serum (FBS; 10% vs. 20%) and epidermal growth factor (EGF; 5ng/mL vs. 10ng/mL). Tissues were submitted to primary culture and subcultures for 40 days and cells were analyzed for morphology, adhesion, subconfluence, and proliferative activity to develop the growth curve and to determine the population doubling time (PDT), viability, and functional/metabolic activity. No difference was observed between the concentrations of FBS for several parameters, except for viability [FBS10: 85.6% vs. FBS20: 98.2%], PDT [FBS10: 155.4h vs. 77.2h], and functional/metabolic assay [FBS10: 0.57-0.55 vs. FBS20: 0.82-0.99 (D5-D7)]. For the EGF in culture, no difference was observed in the evaluated parameters. In all experiments, the growth curves were typical S-shape and the cells passed through a lag, logarithmic, and plateau phase. In conclusion, 20% FBS is suitable for the recovery of somatic cells; nevertheless, EGF does not improve the quality of growing these cells. To our knowledge, this is the first study culturing somatic cells of collared peccaries.
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17
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Yoo JG, Kim BW, Park MR, Kwon DN, Choi YJ, Shin TS, Cho BW, Seo J, Kim JH, Cho SK. Influences of somatic donor cell sex on in vitro and in vivo embryo development following somatic cell nuclear transfer in pigs. ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES 2016; 30:585-592. [PMID: 27764913 PMCID: PMC5394846 DOI: 10.5713/ajas.16.0591] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Revised: 09/12/2016] [Accepted: 10/18/2016] [Indexed: 11/27/2022]
Abstract
Objective The present study investigates pre- and post-implantation developmental competence of nuclear-transferred porcine embryos derived from male and female fetal fibroblasts. Methods Male and female fetal fibroblasts were transferred to in vitro-matured enucleated oocytes and in vitro and in vivo developmental competence of reconstructed embryos was investigated. And, a total of 6,789 female fibroblast nuclear-transferred embryos were surgically transferred into 41 surrogate gilts and 4,746 male fibroblast nuclear-transferred embryos were surgically transferred into 25 surrogate gilts. Results The competence to develop into blastocysts was not significantly different between the sexes. The mean cell number of female and male cloned blastocysts obtained by in vivo culture (143.8±10.5 to 159.2±14.8) was higher than that of in vitro culture of somatic cell nuclear transfer (SCNT) groups (31.4±8.3 to 33.4±11.1). After embryo transfer, 5 pregnant gilts from each treatment delivered 15 female and 22 male piglets. The average birth weight of the cloned piglets, gestation length, and the postnatal survival rates were not significantly different (p<0.05) between sexes. Conclusion The present study found that the sex difference of the nuclear donor does not affect the developmental rate of porcine SCNT embryos. Furthermore, postnatal survivability of the cloned piglets was not affected by the sex of the donor cell.
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Affiliation(s)
- Jae-Gyu Yoo
- Animal Diseases and Biosecurity Team, National Institute of Animal Science, Rural Development Administration, Wanju 55365, Korea
| | - Byeong-Woo Kim
- Department of Animal Science, Life and Industry Convergence Research Institute, Pusan National University, Miryang 627-706, Korea
| | - Mi-Rung Park
- Animal Diseases and Biosecurity Team, National Institute of Animal Science, Rural Development Administration, Wanju 55365, Korea
| | - Deug-Nam Kwon
- Department of Animal Biotechnology, KonKuk University, Seoul 143-701, Korea
| | - Yun-Jung Choi
- Department of Animal Biotechnology, KonKuk University, Seoul 143-701, Korea
| | - Teak-Soon Shin
- Department of Animal Science, Life and Industry Convergence Research Institute, Pusan National University, Miryang 627-706, Korea
| | - Byung-Wook Cho
- Department of Animal Science, Life and Industry Convergence Research Institute, Pusan National University, Miryang 627-706, Korea
| | - Jakyeom Seo
- Department of Animal Science, Life and Industry Convergence Research Institute, Pusan National University, Miryang 627-706, Korea
| | - Jin-Hoi Kim
- Department of Animal Biotechnology, KonKuk University, Seoul 143-701, Korea
| | - Seong-Keun Cho
- Department of Animal Science, Life and Industry Convergence Research Institute, Pusan National University, Miryang 627-706, Korea
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18
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Zeng F, Huang Z, Yuan Y, Shi J, Cai G, Liu D, Wu Z, Li Z. Effects of RNAi-mediated knockdown of Xist on the developmental efficiency of cloned male porcine embryos. J Reprod Dev 2016; 62:591-597. [PMID: 27569767 PMCID: PMC5177977 DOI: 10.1262/jrd.2016-095] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Xist is an X-linked gene responsible for cis induction of X chromosome inactivation. Studies have indicated that Xist is abnormally activated in the active X chromosome in cloned mouse embryos due to loss of the maternal Xist-repressing imprint following enucleation during somatic cell nuclear transfer (SCNT). Inhibition of Xist expression by injecting small interfering RNA (siRNA) has been shown to enhance the in vivo developmental efficiency of cloned male mouse embryos by more than 10-fold. The purpose of this study was to investigate whether a similar procedure can be applied to improve the cloning efficiency in pigs. We first found that Xist mRNA levels at the morula stage were aberrantly higher in pig SCNT embryos than in in vivo fertilization-derived pig embryos. Injection of a preselected effective anti-Xist siRNA into 1-cell-stage male pig SCNT embryos resulted in significant inhibition of Xist expression through the 16-cell stage. This siRNA-mediated inhibition of Xist significantly increased the total cell number per cloned blastocyst and significantly improved the birth rate of cloned healthy piglets. The present study contributes useful information on the action of Xist in the development of pig SCNT embryos and proposes a new method for enhancing the efficiency of pig cloning.
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Affiliation(s)
- Fang Zeng
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangdong 510642, P. R. China
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19
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Huan Y, Hu K, Xie B, Shi Y, Wang F, Zhou Y, Liu S, Huang B, Zhu J, Liu Z, He Y, Li J, Kong Q, Liu Z. Ovulation Statuses of Surrogate Gilts Are Associated with the Efficiency of Excellent Pig Cloning. PLoS One 2015; 10:e0142549. [PMID: 26565717 PMCID: PMC4643933 DOI: 10.1371/journal.pone.0142549] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Accepted: 10/25/2015] [Indexed: 11/18/2022] Open
Abstract
Somatic cell nuclear transfer (SCNT) is an assisted reproductive technique that can produce multiple copies of excellent livestock. However, low cloning efficiency limits the application of SCNT. In this study, we systematically investigated the major influencing factors related to the overall cloning efficiency in pigs. Here, 13620 cloned embryos derived from excellent pigs were transferred into 79 surrogate gilts, and 119 live cloned piglets were eventually generated. During cloning, group of cloned embryos derived from excellent Landrace or Large white pigs presented no significant differences of cleavage and blastocyst rates, blastocyst cell numbers, surrogate pregnancy and delivery rates, average numbers of piglets born and alive and cloning efficiencies, and group of 101-150, 151-200 or 201-250 cloned embryos transferred per surrogate also displayed a similar developmental efficiency. When estrus stage of surrogate gilts was compared, group of embryo transfer on Day 2 of estrus showed significantly higher pregnancy rate, delivery rate, average number of piglets born, average alive piglet number or cloning efficiency than group on Day 1, Day 3, Day 4 or Day 5, respectively (P<0.05). And, in comparison with the preovulation and postovulation groups, group of surrogate gilts during periovulation displayed a significantly higher overall cloning efficiency (P<0.05). Further investigation of surrogate estrus stage and ovulation status displayed that ovulation status was the real factor underlying estrus stage to determine the overall cloning efficiency. And more, follicle puncture for preovulation, not transfer position shallowed for preovulation or deepened for postovulation, significantly improved the average number of piglets alive and cloning efficiency (P<0.05). In conclusion, our results demonstrated that ovulation status of surrogate gilts was the fundamental factor determining the overall cloning efficiency of excellent pigs, and follicle puncture, not transfer position change, improved cloning efficiency. This work would have important implications in preserving and breeding excellent livestock and improving the overall cloning efficiency.
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Affiliation(s)
- Yanjun Huan
- College of Life Science, Northeast Agricultural University, Harbin, Heilongjiang Province, China
| | - Kui Hu
- College of Life Science, Northeast Agricultural University, Harbin, Heilongjiang Province, China
| | - Bingteng Xie
- College of Life Science, Northeast Agricultural University, Harbin, Heilongjiang Province, China
| | - Yongqian Shi
- College of Life Science, Northeast Agricultural University, Harbin, Heilongjiang Province, China
| | - Feng Wang
- College of Life Science, Northeast Agricultural University, Harbin, Heilongjiang Province, China
| | - Yang Zhou
- College of Life Science, Northeast Agricultural University, Harbin, Heilongjiang Province, China
| | - Shichao Liu
- College of Life Science, Northeast Agricultural University, Harbin, Heilongjiang Province, China
| | - Bo Huang
- College of Life Science, Northeast Agricultural University, Harbin, Heilongjiang Province, China
| | - Jiang Zhu
- College of Life Science, Northeast Agricultural University, Harbin, Heilongjiang Province, China
| | - Zhongfeng Liu
- College of Life Science, Northeast Agricultural University, Harbin, Heilongjiang Province, China
| | - Yilong He
- College of Life Science, Northeast Agricultural University, Harbin, Heilongjiang Province, China
| | - Jingyu Li
- College of Life Science, Northeast Agricultural University, Harbin, Heilongjiang Province, China
| | - Qingran Kong
- College of Life Science, Northeast Agricultural University, Harbin, Heilongjiang Province, China
| | - Zhonghua Liu
- College of Life Science, Northeast Agricultural University, Harbin, Heilongjiang Province, China
- * E-mail:
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