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Lee M, Oh JN, Choe GC, Choi KH, Lee DK, Kim SH, Jeong J, Ahn Y, Lee CK. NANOG expression in parthenogenetic porcine blastocysts is required for intact lineage specification and pluripotency. Anim Biosci 2023; 36:1905-1917. [PMID: 37641830 PMCID: PMC10623019 DOI: 10.5713/ab.23.0210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 07/31/2023] [Accepted: 08/08/2023] [Indexed: 08/31/2023] Open
Abstract
OBJECTIVE Nanog homeobox (NANOG) is a core transcription factor that contributes to pluripotency along with octamer binding transcription factor-4 (OCT4) and sex determining region-Y box-2 (SOX2). It is an epiblast lineage marker in mammalian pre-implantation embryos and exhibits a species-specific expression pattern. Therefore, it is important to understand the lineage of NANOG, the trophectoderm, and the primitive endoderm in the pig embryo. METHODS A loss- and gain-of-function analysis was done to determine the role of NANOG in lineage specification in parthenogenetic porcine blastocysts. We analyzed the relationship between NANOG and pluripotent core transcription factors and other lineage makers. RESULTS In NANOG-null late blastocysts, OCT4-, SOX2-, and SOX17-positive cells were decreased, whereas GATA binding protein 6 (GATA6)-positive cells were increased. Quantitative real-time polymerase chain reaction revealed that the expression of SOX2 was decreased in NANOG-null blastocysts, whereas that of primitive endoderm makers, except SOX17, was increased. In NANOG-overexpressing blastocysts, caudal type homeobox 2 (CDX2-), SOX17-, and GATA6-positive cells were decreased. The results indicated that the expression of primitive endoderm markers and trophectoderm-related genes was decreased. CONCLUSION Taken together, the results demonstrate that NANOG is involved in the epiblast and primitive endoderm differentiation and is essential for maintaining pluripotency within the epiblast.
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Affiliation(s)
- Mingyun Lee
- Department of Agricultural Biotechnology, Animal Biotechnology Major, and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 08826,
Korea
| | - Jong-Nam Oh
- Department of Cellular and Molecular Physiology, Yale School of Medicine, New Haven, CT 06510,
USA
| | - Gyung Cheol Choe
- Department of Agricultural Biotechnology, Animal Biotechnology Major, and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 08826,
Korea
| | - Kwang-Hwan Choi
- Department of Agricultural Biotechnology, Animal Biotechnology Major, and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 08826,
Korea
| | - Dong-Kyung Lee
- Department of Agricultural Biotechnology, Animal Biotechnology Major, and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 08826,
Korea
| | - Seung-Hun Kim
- Department of Agricultural Biotechnology, Animal Biotechnology Major, and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 08826,
Korea
| | - Jinsol Jeong
- Department of Agricultural Biotechnology, Animal Biotechnology Major, and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 08826,
Korea
| | - Yelim Ahn
- Department of Agricultural Biotechnology, Animal Biotechnology Major, and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 08826,
Korea
| | - Chang-Kyu Lee
- Department of Agricultural Biotechnology, Animal Biotechnology Major, and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 08826,
Korea
- Institute of Green Bio Science and Technology, Seoul National University, Pyeongchang 25354,
Korea
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Oh JN, Jeong J, Lee M, Choe GC, Choi KH, Lee DK, Kim SH, Lee CK. Comparison data of transcriptomes from blastocyst seeding samples and cultured cell lines from pigs. Data Brief 2023; 48:109212. [PMID: 37213550 PMCID: PMC10196955 DOI: 10.1016/j.dib.2023.109212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2023] [Revised: 04/21/2023] [Accepted: 05/02/2023] [Indexed: 05/23/2023] Open
Abstract
Fertilized embryos develop and move freely in the reproductive tract until implantation. Subsequently, the embryos continue to develop after attachment to the uterus. Because of the absence of the uterus, in vitro culturing of embryos is limited to a period of approximately a week. Hatched blastocysts were seeded on feeder cells to extend the culture period. We cultured the colonies formed from the blastocysts for an additional 14 days. From the colonies, four types of cells were established, and each type was isolated to extract RNA. RNA sequencing was conducted using NovaSeq6000. Sequencing reads were aligned to genes and transcripts. Raw data from our previous study were used to compare these samples with the cultured cell lines. We analyzed differentially expressed genes and Gene Ontology terms between new samples and cultured cell lines. Our data can provide essential information for extending the period of embryo culture in vitro.
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Affiliation(s)
- Jong-Nam Oh
- Department of Agricultural Biotechnology, Animal Biotechnology Major, and Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea
| | - Jinsol Jeong
- Department of Agricultural Biotechnology, Animal Biotechnology Major, and Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea
| | - Mingyun Lee
- Department of Agricultural Biotechnology, Animal Biotechnology Major, and Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea
| | - Gyung Cheol Choe
- Department of Agricultural Biotechnology, Animal Biotechnology Major, and Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea
| | - Kwang-Hwan Choi
- Department of Agricultural Biotechnology, Animal Biotechnology Major, and Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea
| | - Dong-Kyung Lee
- Department of Agricultural Biotechnology, Animal Biotechnology Major, and Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea
| | - Seung-Hun Kim
- Department of Agricultural Biotechnology, Animal Biotechnology Major, and Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea
| | - Chang-Kyu Lee
- Department of Agricultural Biotechnology, Animal Biotechnology Major, and Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea
- Designed Animal and Transplantation Research Institute (DATRI), Institute of Green Bio Science and Technology, Seoul National University, Pyeongchang 25354, Korea
- Corresponding author at: Department of Agricultural Biotechnology, Animal Biotechnology Major, and Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea.
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Oh JN, Jeong J, Lee M, Choe GC, Lee DK, Choi KH, Kim SH, Lee CK. Characterization of multitype colonies originating from porcine blastocysts produced in vitro. Front Cell Dev Biol 2022; 10:918222. [PMID: 36172290 PMCID: PMC9510650 DOI: 10.3389/fcell.2022.918222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Accepted: 08/01/2022] [Indexed: 11/30/2022] Open
Abstract
Many types of embryonic stem cells have been induced from pre-implantation blastocysts to study the specification of early lineages. Various cell lines have been established using chemicals, including excessive inhibitory molecules. Previous studies have also aimed to purify cell populations representing a single embryonic lineage from a protocol. In this study, we used a novel culture condition to induce cells from blastocyst seeding and analyzed their characteristics. Next, signaling inhibitors were introduced during the cell culture period. Furthermore, we investigated the cell types using RNA sequencing. Each type of cell population showed a distinct morphology and reactivity with alkaline phosphatase. Marker proteins enabled each cell type to be distinguished by immunocytochemistry, and genes such as Sox17, Gata4, Gata6, T, and Cdx2 showed applicability for the discrimination of cell types. Signaling inhibitors suppressed the production of some cell types, and gene expression and marker protein patterns were collapsed. RNA-sequencing suggested cell-type-specific marker genes and the correlation among samples. In conclusion, four types of cells could be induced from porcine embryos using a single protocol, and they could be isolated manually. Our data will help promote the study of lineage segregation based on embryonic cells.
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Affiliation(s)
- Jong-Nam Oh
- Department of Agricultural Biotechnology, Animal Biotechnology Major, and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, South Korea
| | - Jinsol Jeong
- Department of Agricultural Biotechnology, Animal Biotechnology Major, and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, South Korea
| | - Mingyun Lee
- Department of Agricultural Biotechnology, Animal Biotechnology Major, and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, South Korea
| | - Gyung Cheol Choe
- Department of Agricultural Biotechnology, Animal Biotechnology Major, and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, South Korea
| | - Dong-Kyung Lee
- Department of Agricultural Biotechnology, Animal Biotechnology Major, and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, South Korea
| | - Kwang-Hwan Choi
- Department of Agricultural Biotechnology, Animal Biotechnology Major, and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, South Korea
| | - Seung-Hun Kim
- Department of Agricultural Biotechnology, Animal Biotechnology Major, and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, South Korea
| | - Chang-Kyu Lee
- Department of Agricultural Biotechnology, Animal Biotechnology Major, and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, South Korea
- Designed Animal and Transplantation Research Institute (DATRI), Institute of Green Bio Science and Technology, Seoul National University, Pyeongchang, South Korea
- *Correspondence: Chang-Kyu Lee,
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Lee M, Oh JN, Choe GC, Kim SH, Choi KH, Lee DK, Jeong J, Lee CK. Changes in OCT4 expression play a crucial role in the lineage specification and proliferation of preimplantation porcine blastocysts. Cell Prolif 2022; 55:e13313. [PMID: 35883229 DOI: 10.1111/cpr.13313] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2022] [Revised: 06/22/2022] [Accepted: 06/24/2022] [Indexed: 01/14/2023] Open
Abstract
OBJECTIVES Curiosity about the role of OCT4, a core transcription factor that maintains inner cell mass (ICM) formation during preimplantation embryogenesis and the pluripotent state in embryonic development, has long been an issue. OCT4 has a species-specific expression pattern in mammalian preimplantation embryogenesis and is known to play an essential role in ICM formation. However, there is a need to study new roles for OCT4-related pluripotency networks and second-cell fate decisions. MATERIALS AND METHODS To determine the functions of OCT4 in lineage specification and embryo proliferation, loss- and gain-of-function studies were performed on porcine parthenotes using microinjection. Then, we performed immunocytochemistry and quantitative real-time polymerase chain reaction (PCR) to examine the association of OCT4 with other lineage markers and its effect on downstream genes. RESULTS In OCT4-targeted late blastocysts, SOX2, NANOG, and SOX17 positive cells were decreased, and the total cell number of blastocysts was also decreased. According to real-time PCR analysis, NANOG, SOX17, and CDK4 were decreased in OCT4-targeted blastocysts, but trophoblast-related genes were increased. In OCT4-overexpressing blastocysts, SOX2 and NANOG positive cells increased, while SOX17 positive cells decreased, and while total cell number of blastocysts increased. As a result of real-time PCR analysis, the expression of SOX2, NANOG, and CDK4 was increased, but the expression of SOX17 was decreased. CONCLUSION Taken together, our results demonstrated that OCT4 leads pluripotency in porcine blastocysts and also plays an important role in ICM formation, secondary cell fate decision, and cell proliferation.
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Affiliation(s)
- Mingyun Lee
- Department of Agricultural Biotechnology, Animal Biotechnology Major, and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, South Korea
| | - Jong-Nam Oh
- Department of Agricultural Biotechnology, Animal Biotechnology Major, and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, South Korea
| | - Gyung Cheol Choe
- Department of Agricultural Biotechnology, Animal Biotechnology Major, and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, South Korea
| | - Seung-Hun Kim
- Department of Agricultural Biotechnology, Animal Biotechnology Major, and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, South Korea
| | - Kwang-Hwan Choi
- Department of Agricultural Biotechnology, Animal Biotechnology Major, and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, South Korea
| | - Dong-Kyung Lee
- Department of Agricultural Biotechnology, Animal Biotechnology Major, and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, South Korea
| | - Jinsol Jeong
- Department of Agricultural Biotechnology, Animal Biotechnology Major, and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, South Korea
| | - Chang-Kyu Lee
- Department of Agricultural Biotechnology, Animal Biotechnology Major, and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, South Korea.,Institute of Green Bio Science and Technology, Seoul National University, Pyeongchang, South Korea
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Kim B, Choi Y. The Development, Differentiation, and Toxicity in Reproduction. Int J Mol Sci 2022; 23:ijms23137183. [PMID: 35806199 PMCID: PMC9266829 DOI: 10.3390/ijms23137183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Accepted: 06/23/2022] [Indexed: 11/16/2022] Open
Affiliation(s)
- Byeongseok Kim
- Department of Stem Cell and Regenerative Biotechnology, Konkuk University, Seoul 05029, Korea;
| | - Youngsok Choi
- Department of Stem Cell and Regenerative Biotechnology, Konkuk University, Seoul 05029, Korea;
- Humanized Pig Center, Konkuk University, Seoul 05029, Korea
- Correspondence: ; Tel.: +82-2-450-3969
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Lee M, Choi K, Oh J, Kim S, Lee D, Choe GC, Jeong J, Lee C. SOX2 plays a crucial role in cell proliferation and lineage segregation during porcine pre-implantation embryo development. Cell Prolif 2021; 54:e13097. [PMID: 34250657 PMCID: PMC8349655 DOI: 10.1111/cpr.13097] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 06/09/2021] [Accepted: 06/28/2021] [Indexed: 12/31/2022] Open
Abstract
OBJECTIVES Gene regulation in early embryos has been widely studied for a long time because lineage segregation gives rise to the formation of a pluripotent cell population, known as the inner cell mass (ICM), during pre-implantation embryo development. The extraordinarily longer pre-implantation embryo development in pigs leads to the distinct features of the pluripotency network compared with mice and humans. For these reasons, a comparative study using pre-implantation pig embryos would provide new insights into the mammalian pluripotency network and help to understand differences in the roles and networks of genes in pre-implantation embryos between species. MATERIALS AND METHODS To analyse the functions of SOX2 in lineage segregation and cell proliferation, loss- and gain-of-function studies were conducted in pig embryos using an overexpression vector and the CRISPR/Cas9 system. Then, we analysed the morphological features and examined the effect on the expression of downstream genes through immunocytochemistry and quantitative real-time PCR. RESULTS Our results showed that among the core pluripotent factors, only SOX2 was specifically expressed in the ICM. In SOX2-disrupted blastocysts, the expression of the ICM-related genes, but not OCT4, was suppressed, and the total cell number was also decreased. Likewise, according to real-time PCR analysis, pluripotency-related genes, excluding OCT4, and proliferation-related genes were decreased in SOX2-targeted blastocysts. In SOX2-overexpressing embryos, the total blastocyst cell number was greatly increased but the ICM/TE ratio decreased. CONCLUSIONS Taken together, our results demonstrated that SOX2 is essential for ICM formation and cell proliferation in porcine early-stage embryogenesis.
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Affiliation(s)
- Mingyun Lee
- Department of Agricultural BiotechnologyAnimal Biotechnology Major, and Research Institute of Agriculture and Life SciencesSeoul National UniversityGwanak‐guKorea
| | - Kwang‐Hwan Choi
- Department of Agricultural BiotechnologyAnimal Biotechnology Major, and Research Institute of Agriculture and Life SciencesSeoul National UniversityGwanak‐guKorea
- Research and Development CenterSpace F corporationHwasungKorea
| | - Jong‐Nam Oh
- Department of Agricultural BiotechnologyAnimal Biotechnology Major, and Research Institute of Agriculture and Life SciencesSeoul National UniversityGwanak‐guKorea
| | - Seung‐Hun Kim
- Department of Agricultural BiotechnologyAnimal Biotechnology Major, and Research Institute of Agriculture and Life SciencesSeoul National UniversityGwanak‐guKorea
| | - Dong‐Kyung Lee
- Department of Agricultural BiotechnologyAnimal Biotechnology Major, and Research Institute of Agriculture and Life SciencesSeoul National UniversityGwanak‐guKorea
- Research and Development CenterSpace F corporationHwasungKorea
| | - Gyung Cheol Choe
- Department of Agricultural BiotechnologyAnimal Biotechnology Major, and Research Institute of Agriculture and Life SciencesSeoul National UniversityGwanak‐guKorea
| | - Jinsol Jeong
- Department of Agricultural BiotechnologyAnimal Biotechnology Major, and Research Institute of Agriculture and Life SciencesSeoul National UniversityGwanak‐guKorea
| | - Chang‐Kyu Lee
- Department of Agricultural BiotechnologyAnimal Biotechnology Major, and Research Institute of Agriculture and Life SciencesSeoul National UniversityGwanak‐guKorea
- Institute of Green Bio Science and TechnologySeoul National UniversityPyeongchangKorea
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