1
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Lamacova L, Jansova D, Jiang Z, Dvoran M, Aleshkina D, Iyyappan R, Jindrova A, Fan HY, Jiao Y, Susor A. CPEB3 Maintains Developmental Competence of the Oocyte. Cells 2024; 13:850. [PMID: 38786074 PMCID: PMC11119423 DOI: 10.3390/cells13100850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2024] [Revised: 05/13/2024] [Accepted: 05/14/2024] [Indexed: 05/25/2024] Open
Abstract
Mammalian oocyte development depends on the temporally controlled translation of maternal transcripts, particularly in the coordination of meiotic and early embryonic development when transcription has ceased. The translation of mRNA is regulated by various RNA-binding proteins. We show that the absence of cytoplasmic polyadenylation element-binding protein 3 (CPEB3) negatively affects female reproductive fitness. CPEB3-depleted oocytes undergo meiosis normally but experience early embryonic arrest due to a disrupted transcriptome, leading to aberrant protein expression and the subsequent failure of embryonic transcription initiation. We found that CPEB3 stabilizes a subset of mRNAs with a significantly longer 3'UTR that is enriched in its distal region with cytoplasmic polyadenylation elements. Overall, our results suggest that CPEB3 is an important maternal factor that regulates the stability and translation of a subclass of mRNAs that are essential for the initiation of embryonic transcription and thus for embryonic development.
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Affiliation(s)
- Lucie Lamacova
- Laboratory of Biochemistry and Molecular Biology of Germ Cells, IAPG CAS, Rumburska 89, 277 21 Libechov, Czech Republic
| | - Denisa Jansova
- Laboratory of Biochemistry and Molecular Biology of Germ Cells, IAPG CAS, Rumburska 89, 277 21 Libechov, Czech Republic
| | - Zongliang Jiang
- Department of Animal Sciences, Genetics Institute, University of Florida, Gainesville, FL 32610, USA
| | - Michal Dvoran
- Laboratory of Biochemistry and Molecular Biology of Germ Cells, IAPG CAS, Rumburska 89, 277 21 Libechov, Czech Republic
| | - Daria Aleshkina
- Laboratory of Biochemistry and Molecular Biology of Germ Cells, IAPG CAS, Rumburska 89, 277 21 Libechov, Czech Republic
| | - Rajan Iyyappan
- Laboratory of Biochemistry and Molecular Biology of Germ Cells, IAPG CAS, Rumburska 89, 277 21 Libechov, Czech Republic
| | - Anna Jindrova
- Laboratory of Biochemistry and Molecular Biology of Germ Cells, IAPG CAS, Rumburska 89, 277 21 Libechov, Czech Republic
| | - Heng-Yu Fan
- Life Sciences Institute, Zhejiang University, Hangzhou 310058, China
| | - Yuxuan Jiao
- Life Sciences Institute, Zhejiang University, Hangzhou 310058, China
| | - Andrej Susor
- Laboratory of Biochemistry and Molecular Biology of Germ Cells, IAPG CAS, Rumburska 89, 277 21 Libechov, Czech Republic
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2
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Ishiuchi T, Sakamoto M. Molecular mechanisms underlying totipotency. Life Sci Alliance 2023; 6:e202302225. [PMID: 37666667 PMCID: PMC10480501 DOI: 10.26508/lsa.202302225] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Revised: 08/24/2023] [Accepted: 08/28/2023] [Indexed: 09/06/2023] Open
Abstract
Numerous efforts to understand pluripotency in mammals, using pluripotent stem cells in culture, have enabled the generation of artificially induced pluripotent stem cells, which serve as a valuable source for regenerative medicine and the creation of disease models. In contrast to these tremendous successes in the pluripotency field in the past few decades, our understanding of totipotency, which is highlighted by its broader plasticity than pluripotency, is still limited. This is largely attributable to the scarcity of available materials and the lack of in vitro models. However, recent technological advances have unveiled molecular features that characterize totipotent cells. Single-cell or low-input sequencing technologies allow the dissection of pre- and post-fertilization developmental processes at the molecular level with high resolution. In this review, we describe some of the key findings in understanding totipotency and discuss how totipotency is acquired at the beginning of life.
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Affiliation(s)
- Takashi Ishiuchi
- https://ror.org/059x21724 Faculty of Life and Environmental Sciences, University of Yamanashi, Yamanashi, Japan
| | - Mizuki Sakamoto
- https://ror.org/059x21724 Faculty of Life and Environmental Sciences, University of Yamanashi, Yamanashi, Japan
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3
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Somers DJ, Kushner DB, McKinnis AR, Mehmedovic D, Flame RS, Arnold TM. Epigenetic weapons in plant-herbivore interactions: Sulforaphane disrupts histone deacetylases, gene expression, and larval development in Spodoptera exigua while the specialist feeder Trichoplusia ni is largely resistant to these effects. PLoS One 2023; 18:e0293075. [PMID: 37856454 PMCID: PMC10586618 DOI: 10.1371/journal.pone.0293075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Accepted: 10/03/2023] [Indexed: 10/21/2023] Open
Abstract
Cruciferous plants produce sulforaphane (SFN), an inhibitor of nuclear histone deacetylases (HDACs). In humans and other mammals, the consumption of SFN alters enzyme activities, DNA-histone binding, and gene expression within minutes. However, the ability of SFN to act as an HDAC inhibitor in nature, disrupting the epigenetic machinery of insects feeding on these plants, has not been explored. Here, we demonstrate that SFN consumed in the diet inhibits the activity of HDAC enzymes and slows the development of the generalist grazer Spodoptera exigua, in a dose-dependent fashion. After consuming SFN for seven days, the activities of HDAC enzymes in S. exigua were reduced by 50%. Similarly, larval mass was reduced by 50% and pupation was delayed by 2-5 days, with no additional mortality. Similar results were obtained when SFN was applied topically to eggs. RNA-seq analyses confirm that SFN altered the expression of thousands of genes in S. exigua. Genes associated with energy conversion pathways were significantly downregulated while those encoding for ribosomal proteins were dramatically upregulated in response to the consumption of SFN. In contrast, the co-evolved specialist feeder Trichoplusia ni was not negatively impacted by SFN, whether it was consumed in their diet at natural concentrations or applied topically to eggs. The activities of HDAC enzymes were not inhibited and development was not disrupted. In fact, SFN exposure sometimes accelerated T. ni development. RNA-seq analyses revealed that the consumption of SFN alters gene expression in T. ni in similar ways, but to a lesser degree, compared to S. exigua. This apparent resistance of T. ni can be overwhelmed by unnaturally high levels of SFN or by exposure to more powerful pharmaceutical HDAC inhibitors. These results demonstrate that dietary SFN interferes with the epigenetic machinery of insects, supporting the hypothesis that plant-derived HDAC inhibitors serve as "epigenetic weapons" against herbivores.
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Affiliation(s)
- Dana J. Somers
- Department of Biology, Program in Biochemistry and Molecular Biology, Dickinson College, Carlisle, PA United States of America
| | - David B. Kushner
- Department of Biology, Program in Biochemistry and Molecular Biology, Dickinson College, Carlisle, PA United States of America
| | - Alexandria R. McKinnis
- Department of Biology, Program in Biochemistry and Molecular Biology, Dickinson College, Carlisle, PA United States of America
| | - Dzejlana Mehmedovic
- Department of Biology, Program in Biochemistry and Molecular Biology, Dickinson College, Carlisle, PA United States of America
| | - Rachel S. Flame
- Department of Biology, Program in Biochemistry and Molecular Biology, Dickinson College, Carlisle, PA United States of America
| | - Thomas M. Arnold
- Department of Biology, Program in Biochemistry and Molecular Biology, Dickinson College, Carlisle, PA United States of America
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4
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Watanabe N, Hirose M, Hasegawa A, Mochida K, Ogura A, Inoue K. Derivation of embryonic stem cells from wild-derived mouse strains by nuclear transfer using peripheral blood cells. Sci Rep 2023; 13:11175. [PMID: 37430017 DOI: 10.1038/s41598-023-38341-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Accepted: 07/06/2023] [Indexed: 07/12/2023] Open
Abstract
Wild-derived mouse strains have been extensively used in biomedical research because of the high level of inter-strain polymorphisms and phenotypic variations. However, they often show poor reproductive performance and are difficult to maintain by conventional in vitro fertilization and embryo transfer. In this study, we examined the technical feasibility of derivation of nuclear transfer embryonic stem cells (ntESCs) from wild-derived mouse strains for their safe genetic preservation. We used leukocytes collected from peripheral blood as nuclear donors without sacrificing them. We successfully established 24 ntESC lines from two wild-derived strains of CAST/Ei and CASP/1Nga (11 and 13 lines, respectively), both belonging to Mus musculus castaneus, a subspecies of laboratory mouse. Most (23/24) of these lines had normal karyotype, and all lines examined showed teratoma formation ability (4 lines) and pluripotent marker gene expression (8 lines). Two male lines examined (one from each strain) were proven to be competent to produce chimeric mice following injection into host embryos. By natural mating of these chimeric mice, the CAST/Ei male line was confirmed to have germline transmission ability. Our results demonstrate that inter-subspecific ntESCs derived from peripheral leukocytes could provide an alternative strategy for preserving invaluable genetic resources of wild-derived mouse strains.
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Affiliation(s)
- Naomi Watanabe
- RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan
- Graduate School of Science and Technology, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Michiko Hirose
- RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan
| | - Ayumi Hasegawa
- RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan
| | - Keiji Mochida
- RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan
| | - Atsuo Ogura
- RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan.
- Graduate School of Science and Technology, University of Tsukuba, Tsukuba, Ibaraki, Japan.
| | - Kimiko Inoue
- RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan.
- Graduate School of Science and Technology, University of Tsukuba, Tsukuba, Ibaraki, Japan.
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5
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Moura MT. Cloning by SCNT: Integrating Technical and Biology-Driven Advances. Methods Mol Biol 2023; 2647:1-35. [PMID: 37041327 DOI: 10.1007/978-1-0716-3064-8_1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/13/2023]
Abstract
Somatic cell nuclear transfer (SCNT) into enucleated oocytes initiates nuclear reprogramming of lineage-committed cells to totipotency. Pioneer SCNT work culminated with cloned amphibians from tadpoles, while technical and biology-driven advances led to cloned mammals from adult animals. Cloning technology has been addressing fundamental questions in biology, propagating desired genomes, and contributing to the generation of transgenic animals or patient-specific stem cells. Nonetheless, SCNT remains technically complex and cloning efficiency relatively low. Genome-wide technologies revealed barriers to nuclear reprogramming, such as persistent epigenetic marks of somatic origin and reprogramming resistant regions of the genome. To decipher the rare reprogramming events that are compatible with full-term cloned development, it will likely require technical advances for large-scale production of SCNT embryos alongside extensive profiling by single-cell multi-omics. Altogether, cloning by SCNT remains a versatile technology, while further advances should continuously refresh the excitement of its applications.
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Affiliation(s)
- Marcelo Tigre Moura
- Chemical Biology Graduate Program, Federal University of São Paulo - UNIFESP, Campus Diadema, Diadema - SP, Brazil
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6
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Shikata D, Matoba S, Hada M, Sakashita A, Inoue K, Ogura A. Suppression of endogenous retroviral enhancers in mouse embryos derived from somatic cell nuclear transfer. Front Genet 2022; 13:1032760. [PMID: 36425066 PMCID: PMC9681155 DOI: 10.3389/fgene.2022.1032760] [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: 08/31/2022] [Accepted: 10/25/2022] [Indexed: 11/09/2022] Open
Abstract
Endogenous retroviruses (ERVs) in the mammalian genome play diverse roles in embryonic development. These developmentally related ERVs are generally repressed in somatic cells and therefore are likely repressed in embryos derived from somatic cell nuclear transfer (SCNT). In this study, we sought to identify ERVs that are repressed in SCNT-derived morulae, which might cause previously unexplained embryonic deaths shortly after implantation. Our transcriptome analysis revealed that, amongst ERV families, ERVK was specifically, and strongly downregulated in SCNT-derived embryos while other transposable elements including LINE and ERVL were unchanged. Among the subfamilies of ERVK, RLTR45-int was most repressed in SCNT-derived embryos despite its highest expression in control fertilized embryos. Interestingly, the nearby genes (within 5–50 kb, n = 18; 50–200 kb, n = 63) of the repressed RLTR45-int loci were also repressed in SCNT-derived embryos, with a significant correlation between them. Furthermore, lysine H3K27 acetylation was enriched around the RLTR45-int loci. These findings indicate that RLTR45-int elements function as enhancers of nearby genes. Indeed, deletion of two sequential RLTR45-int loci on chromosome 4 or 18 resulted in downregulations of nearby genes at the morula stage. We also found that RLTR45-int loci, especially SCNT-low, enhancer-like loci, were strongly enriched with H3K9me3, a repressive histone mark. Importantly, these H3K9me3-enriched regions were not activated by overexpression of H3K9me3 demethylase Kdm4d in SCNT-derived embryos, suggesting the presence of another epigenetic barrier repressing their expressions and enhancer activities in SCNT embryos. Thus, we identified ERVK subfamily RLTR45-int, putative enhancer elements, as a strong reprogramming barrier for SCNT (253 words).
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Affiliation(s)
- Daiki Shikata
- Bioresource Engineering Division, RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Shogo Matoba
- Bioresource Engineering Division, RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan
- Cooperative Division of Veterinary Sciences, Tokyo University of Agriculture and Technology, Fuchu, Tokyo, Japan
| | - Masashi Hada
- Bioresource Engineering Division, RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan
- Laboratory of Pathology and Development, Institute for Quantitative Biosciences, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Akihiko Sakashita
- Department of Molecular Biology, Keio University School of Medicine, Shinjuku-ku, Tokyo, Japan
| | - Kimiko Inoue
- Bioresource Engineering Division, RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Atsuo Ogura
- Bioresource Engineering Division, RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan
- RIKEN Cluster for Pioneering Research, Wako, Saitama, Japan
- *Correspondence: Atsuo Ogura,
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7
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Zarei M, Shamaghdari B, Vahabi Z, Dalman A, Eftekhari Yazdi P. Epigenetic reprogramming in cloned mouse embryos following treatment with DNA methyltransferase and histone deacetylase inhibitors. Syst Biol Reprod Med 2022; 68:227-238. [PMID: 35382652 DOI: 10.1080/19396368.2022.2036868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
We examined the effects of DNA methyltransferase inhibitor - RG108, and histone deacetylase inhibitor - SAHA, on the reprogramming parameters of cloned mouse embryos produced by somatic cell nuclear transfer into oocytes. The programming parameters studied included dynamics of histone reacetylation, developmental rate, DNA methylation, and transcript levels of genes, all of which are pivotal to lineage specification and blastocyst formation. At the pronuclear stage, somatic nucleus-transplanted oocytes treated with 5 µM SAHA presented higher histone acetylation at H3K9, H3K14, H4K16 and H4K12, compared to untreated clones (p < 0.05). At the morula stage, cloned embryos treated with 5 μM RG108 or 5 μM SAHA presented lower DNA methylation intensity compared to untreated clones (p < 0.05), resembling the intensity levels of fertilized embryos. However, these effects were not observed when RG108 and SAHA were used in combination. The rate of morula formation was significantly higher in cloned embryos treated with 5 µM SAHA than in untreated clones, whereas treatment with RG108 resulted in no obvious effects on morula formation rates. On the other hand, the combined treatment with RG108 and SAHA resulted in inferior rates of cloned morula formation, compared to untreated clones. At the blastocyst stage, the aberrant expression levels of key developmental genes Oct4 and Cdx2, but not Nanog, were corrected in cloned embryos by the treatment with RG108. This is similar to the intensity levels seen in fertilized embryos. The expression of Rpl7l1 gene was significantly higher in embryos treated with both RG108 and SAHA than in untreated and in control groups. In summary, the present study showed that SAHA and RG108, when applied separately, improve the rate and quality of cloned mouse embryos.
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Affiliation(s)
- Maryam Zarei
- Department of Embryology, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
| | - Boshra Shamaghdari
- Department of Embryology, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
| | - Zeinab Vahabi
- Department of Embryology, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
| | - Azam Dalman
- Department of Embryology, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
| | - Poopak Eftekhari Yazdi
- Department of Embryology, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
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8
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Hada M, Miura H, Tanigawa A, Matoba S, Inoue K, Ogonuki N, Hirose M, Watanabe N, Nakato R, Fujiki K, Hasegawa A, Sakashita A, Okae H, Miura K, Shikata D, Arima T, Shirahige K, Hiratani I, Ogura A. Highly rigid H3.1/H3.2-H3K9me3 domains set a barrier for cell fate reprogramming in trophoblast stem cells. Genes Dev 2022; 36:84-102. [PMID: 34992147 PMCID: PMC8763053 DOI: 10.1101/gad.348782.121] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Accepted: 12/21/2021] [Indexed: 01/22/2023]
Abstract
Here, Hada et al. comprehensively analyzed epigenomic features of mouse trophoblast stem cells (TSCs). They used genome-wide, high-throughput analyses to show that the TSC genome contains large-scale (>1-Mb) rigid heterochromatin architectures that have a high degree of histone H3.1/3.2–H3K9me3 accumulation, termed TSC-defined highly heterochromatinized domains (THDs), and are uniquely developed in placental lineage cells that serve to protect them from fate reprogramming to stably maintain placental function. The placenta is a highly evolved, specialized organ in mammals. It differs from other organs in that it functions only for fetal maintenance during gestation. Therefore, there must be intrinsic mechanisms that guarantee its unique functions. To address this question, we comprehensively analyzed epigenomic features of mouse trophoblast stem cells (TSCs). Our genome-wide, high-throughput analyses revealed that the TSC genome contains large-scale (>1-Mb) rigid heterochromatin architectures with a high degree of histone H3.1/3.2–H3K9me3 accumulation, which we termed TSC-defined highly heterochromatinized domains (THDs). Importantly, depletion of THDs by knockdown of CAF1, an H3.1/3.2 chaperone, resulted in down-regulation of TSC markers, such as Cdx2 and Elf5, and up-regulation of the pluripotent marker Oct3/4, indicating that THDs maintain the trophoblastic nature of TSCs. Furthermore, our nuclear transfer technique revealed that THDs are highly resistant to genomic reprogramming. However, when H3K9me3 was removed, the TSC genome was fully reprogrammed, giving rise to the first TSC cloned offspring. Interestingly, THD-like domains are also present in mouse and human placental cells in vivo, but not in other cell types. Thus, THDs are genomic architectures uniquely developed in placental lineage cells, which serve to protect them from fate reprogramming to stably maintain placental function.
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Affiliation(s)
- Masashi Hada
- Bioresource Engineering Division, Bioresource Center, RIKEN, Tsukuba, Ibaraki 305-0074, Japan.,Institute of Quantitative Biosciences, The University of Tokyo, Tokyo 113-0032, Japan
| | - Hisashi Miura
- Laboratory for Developmental Epigenetics, RIKEN Center for Developmental Biology, Center for Biosystems Dynamics Research, Kobe 650-0047, Japan
| | - Akie Tanigawa
- Laboratory for Developmental Epigenetics, RIKEN Center for Developmental Biology, Center for Biosystems Dynamics Research, Kobe 650-0047, Japan
| | - Shogo Matoba
- Bioresource Engineering Division, Bioresource Center, RIKEN, Tsukuba, Ibaraki 305-0074, Japan.,Cooperative Division of Veterinary Sciences, Tokyo University of Agriculture and Technology, Fuchu, Tokyo 183-8509, Japan
| | - Kimiko Inoue
- Bioresource Engineering Division, Bioresource Center, RIKEN, Tsukuba, Ibaraki 305-0074, Japan.,Graduate school of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - Narumi Ogonuki
- Bioresource Engineering Division, Bioresource Center, RIKEN, Tsukuba, Ibaraki 305-0074, Japan
| | - Michiko Hirose
- Bioresource Engineering Division, Bioresource Center, RIKEN, Tsukuba, Ibaraki 305-0074, Japan
| | - Naomi Watanabe
- Bioresource Engineering Division, Bioresource Center, RIKEN, Tsukuba, Ibaraki 305-0074, Japan
| | - Ryuichiro Nakato
- Institute of Quantitative Biosciences, The University of Tokyo, Tokyo 113-0032, Japan
| | - Katsunori Fujiki
- Institute of Quantitative Biosciences, The University of Tokyo, Tokyo 113-0032, Japan
| | - Ayumi Hasegawa
- Bioresource Engineering Division, Bioresource Center, RIKEN, Tsukuba, Ibaraki 305-0074, Japan
| | - Akihiko Sakashita
- Department of Molecular Biology, Keio University School of Medicine, Tokyo 160-8582, Japan
| | - Hiroaki Okae
- Department of Informative Genetics, Environment and Genome Research Center, Tohoku University Graduate School of Medicine, Aoba-ku, Sendai 980-8575, Japan
| | - Kento Miura
- Bioresource Engineering Division, Bioresource Center, RIKEN, Tsukuba, Ibaraki 305-0074, Japan.,Department of Disease Model, Research Institute of Radiation Biology and Medicine, Hiroshima University, Hiroshima 734-8553, Japan
| | - Daiki Shikata
- Bioresource Engineering Division, Bioresource Center, RIKEN, Tsukuba, Ibaraki 305-0074, Japan
| | - Takahiro Arima
- Department of Informative Genetics, Environment and Genome Research Center, Tohoku University Graduate School of Medicine, Aoba-ku, Sendai 980-8575, Japan
| | - Katsuhiko Shirahige
- Institute of Quantitative Biosciences, The University of Tokyo, Tokyo 113-0032, Japan
| | - Ichiro Hiratani
- Laboratory for Developmental Epigenetics, RIKEN Center for Developmental Biology, Center for Biosystems Dynamics Research, Kobe 650-0047, Japan.,RIKEN Cluster for Pioneering Research, Hirosawa, Wako, Saitama 351-0198, Japan
| | - Atsuo Ogura
- Bioresource Engineering Division, Bioresource Center, RIKEN, Tsukuba, Ibaraki 305-0074, Japan.,Graduate school of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan.,RIKEN Cluster for Pioneering Research, Hirosawa, Wako, Saitama 351-0198, Japan
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9
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Raczkowski HL, DeKoter RP. Lineage-instructive functions of the E26-transformation-specific-family transcription factor Spi-C in immune cell development and disease. WIREs Mech Dis 2021; 13:e1519. [PMID: 34730294 DOI: 10.1002/wsbm.1519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 12/16/2020] [Accepted: 12/18/2020] [Indexed: 11/10/2022]
Abstract
Cell fate decisions during hematopoiesis are the consequence of a complex mixture of inputs from cell-intrinsic and cell-extrinsic factors. In rare cases, expression of a single transcription factor, or a few key factors, may be sufficient to dictate lineage differentiation in a precursor cell. The E26-transformation-specific-family transcription factor Spi-C has emerged as an example of a lineage-instructive factor involved in the generation of mature, specialized subsets of both myeloid and lymphoid cells. Spi-C can instruct differentiation of splenic precursors into red pulp macrophages responsible for phagocytosing senescent red blood cells. In the B cell compartment, Spi-C acts as a key regulator of cell fate decisions at the pro-B to pre-B cell stage and for plasma cell differentiation. Spi-C regulates key genes including Nfkb1, Bach2, Syk, and Blnk to regulate cell cycle entry and B cell differentiation. Here, we review the biology of the lineage-instructive transcription factor Spi-C and its contribution to mechanisms of disease in macrophages and B cells. This article is categorized under: Cancer > Molecular and Cellular Physiology Immune System Diseases > Molecular and Cellular Physiology Infectious Diseases > Genetics/Genomics/Epigenetics.
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Affiliation(s)
- Hannah L Raczkowski
- Department of Microbiology & Immunology and the Center for Human Immunology, Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada.,Division of Genetics and Development, Children's Health Research Institute, Lawson Research Institute, London, Ontario, Canada
| | - Rodney P DeKoter
- Department of Microbiology & Immunology and the Center for Human Immunology, Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada.,Division of Genetics and Development, Children's Health Research Institute, Lawson Research Institute, London, Ontario, Canada
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10
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Jeong PS, Yang HJ, Park SH, Gwon MA, Joo YE, Kim MJ, Kang HG, Lee S, Park YH, Song BS, Kim SU, Koo DB, Sim BW. Combined Chaetocin/Trichostatin A Treatment Improves the Epigenetic Modification and Developmental Competence of Porcine Somatic Cell Nuclear Transfer Embryos. Front Cell Dev Biol 2021; 9:709574. [PMID: 34692674 PMCID: PMC8526721 DOI: 10.3389/fcell.2021.709574] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Accepted: 09/15/2021] [Indexed: 01/03/2023] Open
Abstract
Developmental defects in somatic cell nuclear transfer (SCNT) embryos are principally attributable to incomplete epigenetic reprogramming. Small-molecule inhibitors such as histone methyltransferase inhibitors (HMTi) and histone deacetylase inhibitors (HDACi) have been used to improve reprogramming efficiency of SCNT embryos. However, their possible synergistic effect on epigenetic reprogramming has not been studied. In this study, we explored whether combined treatment with an HMTi (chaetocin) and an HDACi (trichostatin A; TSA) synergistically enhanced epigenetic reprogramming and the developmental competence of porcine SCNT embryos. Chaetocin, TSA, and the combination significantly increased the cleavage and blastocyst formation rate, hatching/hatched blastocyst rate, and cell numbers and survival rate compared to control embryos. In particular, the combined treatment improved the rate of development to blastocysts more so than chaetocin or TSA alone. TSA and combined chaetocin/TSA significantly reduced the H3K9me3 levels and increased the H3K9ac levels in SCNT embryos, although chaetocin alone significantly reduced only the H3K9me3 levels. Moreover, these inhibitors also decreased global DNA methylation in SCNT embryos. In addition, the expression of zygotic genome activation- and imprinting-related genes was increased by chaetocin or TSA, and more so by the combination, to levels similar to those of in vitro-fertilized embryos. These results suggest that combined chaetocin/TSA have synergistic effects on improving the developmental competences by regulating epigenetic reprogramming and correcting developmental potential-related gene expression in porcine SCNT embryos. Therefore, these strategies may contribute to the generation of transgenic pigs for biomedical research.
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Affiliation(s)
- Pil-Soo Jeong
- Futuristic Animal Resource and Research Center (FARRC), Korea Research Institute of Bioscience and Biotechnology (KRIBB), Cheongju, South Korea.,Department of Biotechnology, College of Engineering, Daegu University, Gyeongsan, South Korea
| | - Hae-Jun Yang
- Futuristic Animal Resource and Research Center (FARRC), Korea Research Institute of Bioscience and Biotechnology (KRIBB), Cheongju, South Korea
| | - Soo-Hyun Park
- Futuristic Animal Resource and Research Center (FARRC), Korea Research Institute of Bioscience and Biotechnology (KRIBB), Cheongju, South Korea.,Department of Animal Science, College of Natural Resources and Life Science, Pusan National University, Miryang, South Korea
| | - Min Ah Gwon
- Futuristic Animal Resource and Research Center (FARRC), Korea Research Institute of Bioscience and Biotechnology (KRIBB), Cheongju, South Korea.,Department of Biotechnology, College of Engineering, Daegu University, Gyeongsan, South Korea
| | - Ye Eun Joo
- Futuristic Animal Resource and Research Center (FARRC), Korea Research Institute of Bioscience and Biotechnology (KRIBB), Cheongju, South Korea.,Department of Animal Science, College of Natural Resources and Life Science, Pusan National University, Miryang, South Korea
| | - Min Ju Kim
- Futuristic Animal Resource and Research Center (FARRC), Korea Research Institute of Bioscience and Biotechnology (KRIBB), Cheongju, South Korea.,Department of Animal Science, College of Natural Resources and Life Science, Pusan National University, Miryang, South Korea
| | - Hyo-Gu Kang
- Futuristic Animal Resource and Research Center (FARRC), Korea Research Institute of Bioscience and Biotechnology (KRIBB), Cheongju, South Korea.,Department of Animal Science and Biotechnology, College of Agriculture and Life Science, Chungnam National University, Daejeon, South Korea
| | - Sanghoon Lee
- Futuristic Animal Resource and Research Center (FARRC), Korea Research Institute of Bioscience and Biotechnology (KRIBB), Cheongju, South Korea
| | - Young-Ho Park
- Futuristic Animal Resource and Research Center (FARRC), Korea Research Institute of Bioscience and Biotechnology (KRIBB), Cheongju, South Korea
| | - Bong-Seok Song
- Futuristic Animal Resource and Research Center (FARRC), Korea Research Institute of Bioscience and Biotechnology (KRIBB), Cheongju, South Korea
| | - Sun-Uk Kim
- Futuristic Animal Resource and Research Center (FARRC), Korea Research Institute of Bioscience and Biotechnology (KRIBB), Cheongju, South Korea.,Department of Functional Genomics, University of Science and Technology, Daejeon, South Korea
| | - Deog-Bon Koo
- Department of Biotechnology, College of Engineering, Daegu University, Gyeongsan, South Korea
| | - Bo-Woong Sim
- Futuristic Animal Resource and Research Center (FARRC), Korea Research Institute of Bioscience and Biotechnology (KRIBB), Cheongju, South Korea
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11
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Kamimura S, Inoue K, Mizutani E, Kim JM, Inoue H, Ogonuki N, Miyamoto K, Ihashi S, Itami N, Wakayama T, Ito A, Nishino N, Yoshida M, Ogura A. Improved development of mouse somatic cell nuclear transfer embryos by chlamydocin analogues, class I and IIa histone deacetylase inhibitors†. Biol Reprod 2021; 105:543-553. [PMID: 33982061 PMCID: PMC8335354 DOI: 10.1093/biolre/ioab096] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 03/29/2021] [Accepted: 05/07/2021] [Indexed: 12/13/2022] Open
Abstract
In mammalian cloning by somatic cell nuclear transfer (SCNT), the treatment of reconstructed embryos with histone deacetylase (HDAC) inhibitors improves efficiency. So far, most of those used for SCNT are hydroxamic acid derivatives-such as trichostatin A-characterized by their broad inhibitory spectrum. Here, we examined whether mouse SCNT efficiency could be improved using chlamydocin analogues, a family of newly designed agents that specifically inhibit class I and IIa HDACs. Development of SCNT-derived embryos in vitro and in vivo revealed that four out of five chlamydocin analogues tested could promote the development of cloned embryos. The highest pup rates (7.1-7.2%) were obtained with Ky-9, similar to those achieved with trichostatin A (7.2-7.3%). Thus, inhibition of class I and/or IIa HDACs in SCNT-derived embryos is enough for significant improvements in full-term development. In mouse SCNT, the exposure of reconstructed oocytes to HDAC inhibitors is limited to 8-10 h because longer inhibition with class I inhibitors causes a two-cell developmental block. Therefore, we used Ky-29, with higher selectivity for class IIa than class I HDACs for longer treatment of SCNT-derived embryos. As expected, 24-h treatment with Ky-29 up to the two-cell stage did not induce a developmental block, but the pup rate was not improved. This suggests that the one-cell stage is a critical period for improving SCNT cloning using HDAC inhibitors. Thus, chlamydocin analogues appear promising for understanding and improving the epigenetic status of mammalian SCNT-derived embryos through their specific inhibitory effects on HDACs.
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Affiliation(s)
- Satoshi Kamimura
- RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan.,Faculty of Life and Environmental Sciences, University of Yamanashi, Kofu, Yamanashi, Japan.,Department of Basic Medical Sciences for Radiation Damages, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan
| | - Kimiko Inoue
- RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan.,Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Eiji Mizutani
- RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan.,Faculty of Life and Environmental Sciences, University of Yamanashi, Kofu, Yamanashi, Japan.,Laboratory of Stem Cell Therapy, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan.,Division of Stem Cell Therapy, Institute of Medical Science, University of Tokyo, Tokyo, Japan
| | - Jin-Moon Kim
- RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan
| | - Hiroki Inoue
- RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan
| | - Narumi Ogonuki
- RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan
| | - Kei Miyamoto
- Faculty of Biology-Oriented Science and Technology, Kindai University, Kinokawa-shi, Wakayama-ken, Japan
| | - Shunya Ihashi
- Faculty of Biology-Oriented Science and Technology, Kindai University, Kinokawa-shi, Wakayama-ken, Japan
| | - Nobuhiko Itami
- RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan
| | - Teruhiko Wakayama
- Faculty of Life and Environmental Sciences, University of Yamanashi, Kofu, Yamanashi, Japan
| | - Akihiro Ito
- School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, Hachioji, Tokyo, Japan.,RIKEN Center for Sustainable Resource Science, Wako, Saitama, Japan
| | - Norikazu Nishino
- RIKEN Center for Sustainable Resource Science, Wako, Saitama, Japan.,Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, Kitakyushu, Japan
| | - Minoru Yoshida
- RIKEN Center for Sustainable Resource Science, Wako, Saitama, Japan.,Department of Biotechnology, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Atsuo Ogura
- RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan.,Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan.,RIKEN Cluster for Pioneering Research, Wako, Saitama, Japan
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12
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Arabacı DH, Terzioğlu G, Bayırbaşı B, Önder TT. Going up the hill: chromatin-based barriers to epigenetic reprogramming. FEBS J 2020; 288:4798-4811. [PMID: 33190371 DOI: 10.1111/febs.15628] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 10/20/2020] [Accepted: 11/12/2020] [Indexed: 12/28/2022]
Abstract
The establishment and maintenance of cellular identity are crucial during development and tissue homeostasis. Epigenetic mechanisms based largely on DNA methylation and histone modifications serve to reinforce and safeguard differentiated cell states. Somatic cell nuclear transfer (SCNT) or transcription factors such as Oct4, Sox2, Klf4, c-MYC (OSKM) can erase somatic cell identity and reprogram the cells to a pluripotent state. In doing so, reprogramming must reset the chromatin landscape, silence somatic-specific gene expression programs, and, in their place, activate the pluripotency network. In this viewpoint, we consider the major chromatin-based barriers for reprogramming of somatic cells to pluripotency. Among these, repressive chromatin modifications such as DNA methylation, H3K9 methylation, variant histone deposition, and histone deacetylation generally block the activation of pluripotency genes. In contrast, active transcription-associated chromatin marks such as DOT1L-catalyzed H3K79 methylation, FACT-mediated histone turnover, active enhancer SUMOylation, and EP300/CBP bromodomain-mediated interactions act to maintain somatic-specific gene expression programs. We highlight how genetic or chemical inhibition of both types of barriers can enhance the kinetics and/or efficiency of reprogramming. Understanding the mechanisms by which these barriers function provides insight into how chromatin marks help maintain cell identity.
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Affiliation(s)
| | | | | | - Tamer T Önder
- School of Medicine, Koç University, Istanbul, Turkey
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13
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Lee MH, Lee J, Choi SH, Jie EY, Jeong JC, Kim CY, Kim SW. The Effect of Sodium Butyrate on Adventitious Shoot Formation Varies among the Plant Species and the Explant Types. Int J Mol Sci 2020; 21:E8451. [PMID: 33182800 PMCID: PMC7696800 DOI: 10.3390/ijms21228451] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 11/06/2020] [Accepted: 11/08/2020] [Indexed: 12/24/2022] Open
Abstract
Histone acetylation plays an important role in plant growth and development. Here, we investigated the effect of sodium butyrate (NaB), a histone deacetylase inhibitor, on adventitious shoot formation from protoplast-derived calli and cotyledon explants of tobacco (Nicotiana benthamiana) and tomato (Solanum lycopersicum). The frequency of adventitious shoot formation from protoplast-derived calli was higher in shoot induction medium (SIM) containing NaB than in the control. However, the frequency of adventitious shoot formation from cotyledon explants of tobacco under the 0.1 mM NaB treatment was similar to that in the control, but it decreased with increasing NaB concentration. Unlike in tobacco, NaB decreased adventitious shoot formation in tomato explants in a concentration-dependent manner, but it did not have any effect on adventitious shoot formation in calli. NaB inhibited or delayed the expression of D-type cyclin (CYCD3-1) and shoot-regeneration regulatory gene WUSCHEL (WUS) in cotyledon explants of tobacco and tomato. However, compared to that in control SIM, the expression of WUS was promoted more rapidly in tobacco calli cultured in NaB-containing SIM, but the expression of CYCD3-1 was inhibited. In conclusion, the effect of NaB on adventitious shoot formation and expression of CYCD3-1 and WUS genes depended on the plant species and whether the effects were tested on explants or protoplast-derived calli.
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Affiliation(s)
| | | | | | | | | | | | - Suk Weon Kim
- Biological Resource Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeongeup 56212, Korea; (M.H.L.); (J.L.); (S.H.C.); (E.Y.J.); (J.C.J.); (C.Y.K.)
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14
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Yang G, Zhang L, Liu W, Qiao Z, Shen S, Zhu Q, Gao R, Wang M, Wang M, Li C, Liu M, Sun J, Wang L, Liu W, Cui X, Zhao K, Zang R, Chen M, Liang Z, Wang L, Kou X, Zhao Y, Wang H, Wang Y, Gao S, Chen J, Jiang C. Dux-Mediated Corrections of Aberrant H3K9ac during 2-Cell Genome Activation Optimize Efficiency of Somatic Cell Nuclear Transfer. Cell Stem Cell 2020; 28:150-163.e5. [PMID: 33049217 DOI: 10.1016/j.stem.2020.09.006] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 07/07/2020] [Accepted: 09/11/2020] [Indexed: 02/06/2023]
Abstract
Differentiated somatic cells can be reprogrammed to totipotent embryos through somatic cell nuclear transfer (SCNT) with low efficiency. The histone deacetylase inhibitor trichostatin A (TSA) has been found to improve SCNT efficiency, but the underlying mechanism remains undetermined. Here, we examined genome-wide H3K9ac during SCNT embryo development and found that aberrant H3K9ac regions resulted in reduced 2-cell genome activation. TSA treatment largely corrects aberrant acetylation in SCNT embryos with an efficiency that is dictated by the native epigenetic environment. We further identified that the overexpression of Dux greatly improves SCNT efficiency by correcting the aberrant H3K9ac signal at its target sites, ensuring appropriate 2-cell genome activation. Intriguingly, the improvement in development mediated by TSA and Kdm4b is impeded by Dux knockout in SCNT embryos. Together, our study reveals that reprogramming of H3K9ac is important for optimal SCNT efficiency and identifies Dux as a crucial transcription factor in this process.
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Affiliation(s)
- Guang Yang
- Clinical and Translation Research Center of Shanghai First Maternity & Infant Hospital, Shanghai Key Laboratory of Signaling and Disease Research, School of Life Sciences and Technology, Tongji University, Shanghai 200092, China; Frontier Science Center for Stem Cell Research, Tongji University, Shanghai 200092, China; Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration of Ministry of Education, Orthopaedic Department of Tongji Hospital, Tongji University, Shanghai 200065, China
| | - Linfeng Zhang
- Clinical and Translation Research Center of Shanghai First Maternity & Infant Hospital, Shanghai Key Laboratory of Signaling and Disease Research, School of Life Sciences and Technology, Tongji University, Shanghai 200092, China; Frontier Science Center for Stem Cell Research, Tongji University, Shanghai 200092, China
| | - Wenqiang Liu
- Clinical and Translation Research Center of Shanghai First Maternity & Infant Hospital, Shanghai Key Laboratory of Signaling and Disease Research, School of Life Sciences and Technology, Tongji University, Shanghai 200092, China; Frontier Science Center for Stem Cell Research, Tongji University, Shanghai 200092, China
| | - Zhibin Qiao
- Clinical and Translation Research Center of Shanghai First Maternity & Infant Hospital, Shanghai Key Laboratory of Signaling and Disease Research, School of Life Sciences and Technology, Tongji University, Shanghai 200092, China; Frontier Science Center for Stem Cell Research, Tongji University, Shanghai 200092, China; Institute for Regenerative Medicine, Shanghai East Hospital, School of Life Sciences and Technology, Tongji University, Shanghai 200123, P.R. China
| | - Shijun Shen
- Frontier Science Center for Stem Cell Research, Tongji University, Shanghai 200092, China; Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration of Ministry of Education, Orthopaedic Department of Tongji Hospital, Tongji University, Shanghai 200065, China
| | - Qianshu Zhu
- Frontier Science Center for Stem Cell Research, Tongji University, Shanghai 200092, China; Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration of Ministry of Education, Orthopaedic Department of Tongji Hospital, Tongji University, Shanghai 200065, China
| | - Rui Gao
- Clinical and Translation Research Center of Shanghai First Maternity & Infant Hospital, Shanghai Key Laboratory of Signaling and Disease Research, School of Life Sciences and Technology, Tongji University, Shanghai 200092, China; Frontier Science Center for Stem Cell Research, Tongji University, Shanghai 200092, China
| | - Mengting Wang
- Clinical and Translation Research Center of Shanghai First Maternity & Infant Hospital, Shanghai Key Laboratory of Signaling and Disease Research, School of Life Sciences and Technology, Tongji University, Shanghai 200092, China; Frontier Science Center for Stem Cell Research, Tongji University, Shanghai 200092, China
| | - Mingzhu Wang
- Clinical and Translation Research Center of Shanghai First Maternity & Infant Hospital, Shanghai Key Laboratory of Signaling and Disease Research, School of Life Sciences and Technology, Tongji University, Shanghai 200092, China; Frontier Science Center for Stem Cell Research, Tongji University, Shanghai 200092, China
| | - Chong Li
- Clinical and Translation Research Center of Shanghai First Maternity & Infant Hospital, Shanghai Key Laboratory of Signaling and Disease Research, School of Life Sciences and Technology, Tongji University, Shanghai 200092, China; Frontier Science Center for Stem Cell Research, Tongji University, Shanghai 200092, China
| | - Meng Liu
- Frontier Science Center for Stem Cell Research, Tongji University, Shanghai 200092, China; Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration of Ministry of Education, Orthopaedic Department of Tongji Hospital, Tongji University, Shanghai 200065, China
| | - Jin Sun
- Frontier Science Center for Stem Cell Research, Tongji University, Shanghai 200092, China; Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration of Ministry of Education, Orthopaedic Department of Tongji Hospital, Tongji University, Shanghai 200065, China
| | - Liping Wang
- Frontier Science Center for Stem Cell Research, Tongji University, Shanghai 200092, China; Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration of Ministry of Education, Orthopaedic Department of Tongji Hospital, Tongji University, Shanghai 200065, China
| | - Wenju Liu
- Frontier Science Center for Stem Cell Research, Tongji University, Shanghai 200092, China; Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration of Ministry of Education, Orthopaedic Department of Tongji Hospital, Tongji University, Shanghai 200065, China
| | - Xinyu Cui
- Frontier Science Center for Stem Cell Research, Tongji University, Shanghai 200092, China; Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration of Ministry of Education, Orthopaedic Department of Tongji Hospital, Tongji University, Shanghai 200065, China
| | - Kun Zhao
- Clinical and Translation Research Center of Shanghai First Maternity & Infant Hospital, Shanghai Key Laboratory of Signaling and Disease Research, School of Life Sciences and Technology, Tongji University, Shanghai 200092, China; Frontier Science Center for Stem Cell Research, Tongji University, Shanghai 200092, China
| | - Ruge Zang
- Clinical and Translation Research Center of Shanghai First Maternity & Infant Hospital, Shanghai Key Laboratory of Signaling and Disease Research, School of Life Sciences and Technology, Tongji University, Shanghai 200092, China; Frontier Science Center for Stem Cell Research, Tongji University, Shanghai 200092, China
| | - Mo Chen
- Clinical and Translation Research Center of Shanghai First Maternity & Infant Hospital, Shanghai Key Laboratory of Signaling and Disease Research, School of Life Sciences and Technology, Tongji University, Shanghai 200092, China; Frontier Science Center for Stem Cell Research, Tongji University, Shanghai 200092, China
| | - Zehang Liang
- Frontier Science Center for Stem Cell Research, Tongji University, Shanghai 200092, China; Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration of Ministry of Education, Orthopaedic Department of Tongji Hospital, Tongji University, Shanghai 200065, China
| | - Lu Wang
- Frontier Science Center for Stem Cell Research, Tongji University, Shanghai 200092, China; Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration of Ministry of Education, Orthopaedic Department of Tongji Hospital, Tongji University, Shanghai 200065, China
| | - Xiaochen Kou
- Clinical and Translation Research Center of Shanghai First Maternity & Infant Hospital, Shanghai Key Laboratory of Signaling and Disease Research, School of Life Sciences and Technology, Tongji University, Shanghai 200092, China; Frontier Science Center for Stem Cell Research, Tongji University, Shanghai 200092, China
| | - Yanhong Zhao
- Clinical and Translation Research Center of Shanghai First Maternity & Infant Hospital, Shanghai Key Laboratory of Signaling and Disease Research, School of Life Sciences and Technology, Tongji University, Shanghai 200092, China; Frontier Science Center for Stem Cell Research, Tongji University, Shanghai 200092, China
| | - Hong Wang
- Clinical and Translation Research Center of Shanghai First Maternity & Infant Hospital, Shanghai Key Laboratory of Signaling and Disease Research, School of Life Sciences and Technology, Tongji University, Shanghai 200092, China; Frontier Science Center for Stem Cell Research, Tongji University, Shanghai 200092, China
| | - Yixuan Wang
- Frontier Science Center for Stem Cell Research, Tongji University, Shanghai 200092, China; Institute for Regenerative Medicine, Shanghai East Hospital, School of Life Sciences and Technology, Tongji University, Shanghai 200123, P.R. China
| | - Shaorong Gao
- Clinical and Translation Research Center of Shanghai First Maternity & Infant Hospital, Shanghai Key Laboratory of Signaling and Disease Research, School of Life Sciences and Technology, Tongji University, Shanghai 200092, China; Frontier Science Center for Stem Cell Research, Tongji University, Shanghai 200092, China; Institute for Regenerative Medicine, Shanghai East Hospital, School of Life Sciences and Technology, Tongji University, Shanghai 200123, P.R. China.
| | - Jiayu Chen
- Clinical and Translation Research Center of Shanghai First Maternity & Infant Hospital, Shanghai Key Laboratory of Signaling and Disease Research, School of Life Sciences and Technology, Tongji University, Shanghai 200092, China; Frontier Science Center for Stem Cell Research, Tongji University, Shanghai 200092, China.
| | - Cizhong Jiang
- Frontier Science Center for Stem Cell Research, Tongji University, Shanghai 200092, China; Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration of Ministry of Education, Orthopaedic Department of Tongji Hospital, Tongji University, Shanghai 200065, China.
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15
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Zhang H, Guo F, Qi P, Huang Y, Xie Y, Xu L, Han N, Xu L, Bian H. OsHDA710-Mediated Histone Deacetylation Regulates Callus Formation of Rice Mature Embryo. PLANT & CELL PHYSIOLOGY 2020; 61:1646-1660. [PMID: 32592489 DOI: 10.1093/pcp/pcaa086] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Accepted: 06/17/2020] [Indexed: 05/18/2023]
Abstract
Histone deacetylases (HDACs) play important roles in the regulation of eukaryotic gene expression. The role of HDACs in specialized transcriptional regulation and biological processes is poorly understood. In this study, we evaluated the global expression patterns of genes related to epigenetic modifications during callus initiation in rice. We found that the repression of HDAC activity by trichostatin A (TSA) or by OsHDA710 mutation (hda710) results in impaired callus formation of rice mature embryo and increased global histone H3 acetylation levels. The HDAC inhibition decreased auxin response and cell proliferation in callus formation. Meanwhile, the transcriptional repressors OsARF18 and OsARF22 were upregulated in the callus of hda710. The chromatin immunoprecipitation-quantitative PCR (ChIP-qPCR) analysis demonstrated that the callus of hda710 exhibited enhanced histone H3 acetylation levels at the chromatin regions of OsARF18 and OsARF22. Furthermore, we found that OsARF18 and OsARF22 were regulated through OsHDA710 recruitment to their target loci. In addition, overexpression of OsARF18 decreased the transcription of downstream genes PLT1 and PLT2 and inhibited callus formation of the mature embryo. These results demonstrate that OsHDA710 regulates callus formation by suppressing repressive OsARFs via histone deacetylation during callus formation of rice mature embryo. This indicates that OsHDA710-mediated histone deacetylation is an epigenetic regulation pathway for maintaining auxin response during cell dedifferentiation.
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Affiliation(s)
- Haidao Zhang
- Institute of Genetic and Regenerative Biology, Key Laboratory for Cell and Gene Engineering of Zhejiang Province, College of Life Sciences, Zhejiang University, Hangzhou 310058, China
| | - Fu Guo
- Institute of Genetic and Regenerative Biology, Key Laboratory for Cell and Gene Engineering of Zhejiang Province, College of Life Sciences, Zhejiang University, Hangzhou 310058, China
| | - Peipei Qi
- Institute of Genetic and Regenerative Biology, Key Laboratory for Cell and Gene Engineering of Zhejiang Province, College of Life Sciences, Zhejiang University, Hangzhou 310058, China
| | - Yizi Huang
- Institute of Genetic and Regenerative Biology, Key Laboratory for Cell and Gene Engineering of Zhejiang Province, College of Life Sciences, Zhejiang University, Hangzhou 310058, China
| | - Yongyao Xie
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China
| | - Lei Xu
- Key Laboratory of Plant Nutrition and Fertilizers, Ministry of Agriculture, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Ning Han
- Institute of Genetic and Regenerative Biology, Key Laboratory for Cell and Gene Engineering of Zhejiang Province, College of Life Sciences, Zhejiang University, Hangzhou 310058, China
| | - Lin Xu
- National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, 300 Fenglin Road, Shanghai 200032, China
| | - Hongwu Bian
- Institute of Genetic and Regenerative Biology, Key Laboratory for Cell and Gene Engineering of Zhejiang Province, College of Life Sciences, Zhejiang University, Hangzhou 310058, China
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16
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Loss of H3K27me3 imprinting in the Sfmbt2 miRNA cluster causes enlargement of cloned mouse placentas. Nat Commun 2020; 11:2150. [PMID: 32358519 PMCID: PMC7195362 DOI: 10.1038/s41467-020-16044-8] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Accepted: 04/07/2020] [Indexed: 01/31/2023] Open
Abstract
Somatic cell nuclear transfer (SCNT) in mammals is an inefficient process that is frequently associated with abnormal phenotypes, especially in placentas. Recent studies demonstrated that mouse SCNT placentas completely lack histone methylation (H3K27me3)-dependent imprinting, but how it affects placental development remains unclear. Here, we provide evidence that the loss of H3K27me3 imprinting is responsible for abnormal placental enlargement and low birth rates following SCNT, through upregulation of imprinted miRNAs. When we restore the normal paternal expression of H3K27me3-dependent imprinted genes (Sfmbt2, Gab1, and Slc38a4) in SCNT placentas by maternal knockout, the placentas remain enlarged. Intriguingly, correcting the expression of clustered miRNAs within the Sfmbt2 gene ameliorates the placental phenotype. Importantly, their target genes, which are confirmed to cause SCNT-like placental histology, recover their expression level. The birth rates increase about twofold. Thus, we identify loss of H3K27me3 imprinting as an epigenetic error that compromises embryo development following SCNT. Somatic cell nuclear transfer (SCNT) frequently results in abnormal placenta development in cloned mice. Here the authors show that loss of histone methylation (H3K27me3) imprinting in clustered Sfmbt2 miRNAs contributes to SCNT placenta defect.
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17
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Wójcikowska B, Wójcik AM, Gaj MD. Epigenetic Regulation of Auxin-Induced Somatic Embryogenesis in Plants. Int J Mol Sci 2020; 21:ijms21072307. [PMID: 32225116 PMCID: PMC7177879 DOI: 10.3390/ijms21072307] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 03/17/2020] [Accepted: 03/24/2020] [Indexed: 12/22/2022] Open
Abstract
Somatic embryogenesis (SE) that is induced in plant explants in response to auxin treatment is closely associated with an extensive genetic reprogramming of the cell transcriptome. The significant modulation of the gene transcription profiles during SE induction results from the epigenetic factors that fine-tune the gene expression towards embryogenic development. Among these factors, microRNA molecules (miRNAs) contribute to the post-transcriptional regulation of gene expression. In the past few years, several miRNAs that regulate the SE-involved transcription factors (TFs) have been identified, and most of them were involved in the auxin-related processes, including auxin metabolism and signaling. In addition to miRNAs, chemical modifications of DNA and chromatin, in particular the methylation of DNA and histones and histone acetylation, have been shown to shape the SE transcriptomes. In response to auxin, these epigenetic modifications regulate the chromatin structure, and hence essentially contribute to the control of gene expression during SE induction. In this paper, we describe the current state of knowledge with regard to the SE epigenome. The complex interactions within and between the epigenetic factors, the key SE TFs that have been revealed, and the relationships between the SE epigenome and auxin-related processes such as auxin perception, metabolism, and signaling are highlighted.
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18
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Abstract
The mouse is the most extensively used mammalian laboratory species in biology and medicine because of the ready availability of a wide variety of defined genetic and gene-modified strains and abundant genetic information. Its small size and rapid generation turnover are also advantages compared with other experimental animals. Using these advantages, somatic cell nuclear transfer (SCNT) in mice has provided invaluable information on epigenetics related to SCNT technology and cloning, playing a leading role in relevant technical improvements. These improvements include treatment with histone deacetylase inhibitors, correction of Xist gene expression (controlling X chromosome inactivation), and removal of methylated histones from SCNT-generated embryos, which have proven to be effective for SCNT cloning of other species. However, even with the best combination of these treatments, the birth rate in cloned offspring is still lower than intracytoplasmic sperm injection (ICSI) or in vitro fertilization (IVF). One remaining issue associated with SCNT is placental enlargement (hyperplasia) found in late pregnancy, but this abnormality might not be a major cause for the low efficiency of SCNT because many SCNT-derived embryos die before their placentas start to enlarge at midgestation (early postimplantation stage). It is known that, at this stage, undifferentiated trophoblast cells in the extraembryonic tissue of SCNT-derived embryos fail to proliferate. Understanding the molecular mechanisms is essential for further technical improvements of mouse SCNT, which might also provide clues for technical breakthroughs in mammalian SCNT and cloning in general.
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Affiliation(s)
- Atsuo Ogura
- RIKEN BioResource Research Center, Ibaraki, 305-0074, Japan; Faculty of Life and Environmental Sciences, University of Tsukuba, Ibaraki, 305-8572, Japan; RIKEN Cluster for Pioneering Research, Saitama, 351-0198, Japan.
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19
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Djekidel MN, Inoue A, Matoba S, Suzuki T, Zhang C, Lu F, Jiang L, Zhang Y. Reprogramming of Chromatin Accessibility in Somatic Cell Nuclear Transfer Is DNA Replication Independent. Cell Rep 2019; 23:1939-1947. [PMID: 29768195 PMCID: PMC5988247 DOI: 10.1016/j.celrep.2018.04.036] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Revised: 03/26/2018] [Accepted: 04/06/2018] [Indexed: 01/23/2023] Open
Abstract
Mammalian oocytes have the ability to reset the transcriptional program of differentiated somatic cells into that of totipotent embryos through somatic cell nuclear transfer (SCNT). However, the mechanisms underlying SCNT-mediated reprogramming are largely unknown. To understand the mechanisms governing chromatin reprogramming during SCNT, we profiled DNase I hypersensitive sites (DHSs) in donor cumulus cells and one-cell stage SCNT embryos. To our surprise, the chromatin accessibility landscape of the donor cells is drastically changed to recapitulate that of the in vitro fertilization (IVF)-derived zygotes within 12 hr. Interestingly, this DHS reprogramming takes place even in the presence of a DNA replication inhibitor, suggesting that SCNT-mediated DHS reprogramming is independent of DNA replication. Thus, this study not only reveals the rapid and drastic nature of the changes in chromatin accessibility through SCNT but also establishes a DNA replication-independent model for studying cellular reprogramming.
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Affiliation(s)
- Mohamed Nadhir Djekidel
- Howard Hughes Medical Institute, Boston Children's Hospital, Boston, MA 02115, USA; Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA 02115, USA; Division of Hematology/Oncology, Department of Pediatrics, Boston Children's Hospital, Boston, MA 02115, USA
| | - Azusa Inoue
- Howard Hughes Medical Institute, Boston Children's Hospital, Boston, MA 02115, USA; Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA 02115, USA; Division of Hematology/Oncology, Department of Pediatrics, Boston Children's Hospital, Boston, MA 02115, USA
| | - Shogo Matoba
- Howard Hughes Medical Institute, Boston Children's Hospital, Boston, MA 02115, USA; Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA 02115, USA; Division of Hematology/Oncology, Department of Pediatrics, Boston Children's Hospital, Boston, MA 02115, USA
| | - Tsukasa Suzuki
- Howard Hughes Medical Institute, Boston Children's Hospital, Boston, MA 02115, USA; Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA 02115, USA; Division of Hematology/Oncology, Department of Pediatrics, Boston Children's Hospital, Boston, MA 02115, USA
| | - Chunxia Zhang
- Howard Hughes Medical Institute, Boston Children's Hospital, Boston, MA 02115, USA; Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA 02115, USA; Division of Hematology/Oncology, Department of Pediatrics, Boston Children's Hospital, Boston, MA 02115, USA
| | - Falong Lu
- Howard Hughes Medical Institute, Boston Children's Hospital, Boston, MA 02115, USA; Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA 02115, USA; Division of Hematology/Oncology, Department of Pediatrics, Boston Children's Hospital, Boston, MA 02115, USA
| | - Lan Jiang
- Howard Hughes Medical Institute, Boston Children's Hospital, Boston, MA 02115, USA; Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA 02115, USA; Division of Hematology/Oncology, Department of Pediatrics, Boston Children's Hospital, Boston, MA 02115, USA
| | - Yi Zhang
- Howard Hughes Medical Institute, Boston Children's Hospital, Boston, MA 02115, USA; Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA 02115, USA; Division of Hematology/Oncology, Department of Pediatrics, Boston Children's Hospital, Boston, MA 02115, USA; Department of Genetics, Harvard Medical School, Boston, MA 02115, USA.
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20
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Abstract
The first 20 years of somatic cell nuclear transfer can hardly be described as a success story. Controversially, many factors leading to the fiasco are not intrinsic features of the technique itself. Misunderstandings and baseless accusations alongside with unsupported fears and administrative barriers hampered cloners to overcome the initial challenging period with obvious difficulties that are common features of a radically new approach. In spite of some promising results of mostly sporadic and small-scale experiments, the future of cloning is still uncertain. On the other hand, a reincarnation, just like the idea of electric cars, may result in many benefits in various areas of science and economy. One can only hope that-in contrast to electric cars-the ongoing paralyzed phase will not last for 100 years, and breakthroughs achieved in some promising areas will provide enough evidence to intensify research and large-scale application of cloning in the next decade.
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21
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Agrawal H, Selokar NL, Saini M, Singh MK, Chauhan MS, Palta P, Singla SK, Manik RS. Epigenetic Alteration of Donor Cells with Histone Deacetylase Inhibitor m-Carboxycinnamic Acid Bishydroxymide Improves the In Vitro Developmental Competence of Buffalo (Bubalus bubalis) Cloned Embryos. Cell Reprogram 2019; 20:76-88. [PMID: 29412736 DOI: 10.1089/cell.2017.0035] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Epigenetic reprogramming is an indispensable process during the course of mammalian development, but aberrant in cloned embryos. The aim of this study was to examine the effect of donor cell treatment with histone deacetylase (HDAC) inhibitor m-carboxycinnamic acid bishydroxymide (CBHA) on cloned embryo development and establish its optimal concentration. Different concentrations of CBHA (2.5, 5.0, 10.0, and 20.0 μM) were used to treat buffalo adult fibroblast cells for 24 hours and effect on cell proliferation, gene expression, and histone modifications was analyzed. Based on these experiments, the best concentration was chosen to determine the effect of enhanced gene activation mark on developmental rates. Among the different concentrations, CBHA at higher concentration (20 μM) shows the sign of apoptosis and stress as indicated by proliferation rate and gene expression data. CBHA treatment significantly decreased the activity of HDACs and increased the level of gene activation mark H3K9ac and H3K4me3, but could not alter the level of H3K27ac. Based on these experiments, 5 μM CBHA was chosen for treatment of donor cells used for the production of cloned embryos. There was no significant difference in cleavage rate between the control and CBHA treatment group (98.5% ± 1.5% vs. 99.0% ± 1.0%), whereas, blastocyst rate markedly improved (46.65% ± 1.94% vs. 57.18% ± 2.68%). The level of H3K9ac and H3K27me3 did not differ significantly in cloned blastocyst produced from either control or CBHA-treated cells. Altogether, these results suggested that donor cell treatment with CBHA supports the reprogramming process and improves the cloned preimplantation development.
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Affiliation(s)
- Himanshu Agrawal
- 1 Embryo Biotechnology Laboratory, Animal Biotechnology Centre, ICAR-National Dairy Research Institute , Karnal, Haryana, India .,2 School of Bioengineering and Biosciences, Lovely Professional University , Phagwara, India
| | - Naresh Lalaji Selokar
- 1 Embryo Biotechnology Laboratory, Animal Biotechnology Centre, ICAR-National Dairy Research Institute , Karnal, Haryana, India .,3 Division of Animal Physiology and Reproduction, ICAR-Central Institute for Research on Buffaloes , Hisar, India
| | - Monika Saini
- 1 Embryo Biotechnology Laboratory, Animal Biotechnology Centre, ICAR-National Dairy Research Institute , Karnal, Haryana, India .,3 Division of Animal Physiology and Reproduction, ICAR-Central Institute for Research on Buffaloes , Hisar, India
| | - Manoj Kumar Singh
- 1 Embryo Biotechnology Laboratory, Animal Biotechnology Centre, ICAR-National Dairy Research Institute , Karnal, Haryana, India
| | - Manmohan Singh Chauhan
- 1 Embryo Biotechnology Laboratory, Animal Biotechnology Centre, ICAR-National Dairy Research Institute , Karnal, Haryana, India .,4 ICAR-Central Institute for Research on Goats , Mathura, India
| | - Prabhat Palta
- 1 Embryo Biotechnology Laboratory, Animal Biotechnology Centre, ICAR-National Dairy Research Institute , Karnal, Haryana, India
| | - Suresh Kumar Singla
- 1 Embryo Biotechnology Laboratory, Animal Biotechnology Centre, ICAR-National Dairy Research Institute , Karnal, Haryana, India
| | - Radhey Sham Manik
- 1 Embryo Biotechnology Laboratory, Animal Biotechnology Centre, ICAR-National Dairy Research Institute , Karnal, Haryana, India
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22
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Fu B, Ma H, Liu D. Endogenous Retroviruses Function as Gene Expression Regulatory Elements During Mammalian Pre-implantation Embryo Development. Int J Mol Sci 2019; 20:ijms20030790. [PMID: 30759824 PMCID: PMC6387303 DOI: 10.3390/ijms20030790] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Revised: 02/05/2019] [Accepted: 02/05/2019] [Indexed: 01/13/2023] Open
Abstract
Pre-implantation embryo development encompasses several key developmental events, especially the activation of zygotic genome activation (ZGA)-related genes. Endogenous retroviruses (ERVs), which are regarded as “deleterious genomic parasites”, were previously considered to be “junk DNA”. However, it is now known that ERVs, with limited conservatism across species, mediate conserved developmental processes (e.g., ZGA). Transcriptional activation of ERVs occurs during the transition from maternal control to zygotic genome control, signifying ZGA. ERVs are versatile participants in rewiring gene expression networks during epigenetic reprogramming. Particularly, a subtle balance exists between ERV activation and ERV repression in host–virus interplay, which leads to stage-specific ERV expression during pre-implantation embryo development. A large portion of somatic cell nuclear transfer (SCNT) embryos display developmental arrest and ZGA failure during pre-implantation embryo development. Furthermore, because of the close relationship between ERV activation and ZGA, exploring the regulatory mechanism underlying ERV activation may also shed more light on the enigma of SCNT embryo development in model animals.
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Affiliation(s)
- Bo Fu
- Institute of Animal Husbandry Research, HeiLongJiang Academy of Agricultural Sciences, Harbin 150086, China.
- Key Laboratory of Combine of Planting and Feeding, Ministry of Agriculture of the People's Republic of China, Harbin 150086, China.
| | - Hong Ma
- Institute of Animal Husbandry Research, HeiLongJiang Academy of Agricultural Sciences, Harbin 150086, China.
- Key Laboratory of Combine of Planting and Feeding, Ministry of Agriculture of the People's Republic of China, Harbin 150086, China.
| | - Di Liu
- Institute of Animal Husbandry Research, HeiLongJiang Academy of Agricultural Sciences, Harbin 150086, China.
- Key Laboratory of Combine of Planting and Feeding, Ministry of Agriculture of the People's Republic of China, Harbin 150086, China.
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23
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Yang L, Song L, Liu X, Bai L, Li G. KDM6A and KDM6B play contrasting roles in nuclear transfer embryos revealed by MERVL reporter system. EMBO Rep 2018; 19:embr.201846240. [PMID: 30389724 PMCID: PMC6280793 DOI: 10.15252/embr.201846240] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 09/20/2018] [Accepted: 10/09/2018] [Indexed: 01/02/2023] Open
Abstract
Despite the success of animal cloning by somatic cell nuclear transfer (SCNT) in many species, the method is limited by its low efficiency. After zygotic genome activation (ZGA) during mouse development, a large number of endogenous retroviruses (ERVs) are expressed, including the murine endogenous retrovirus‐L (MuERVL/MERVL). In this study, we generate a series of MERVL reporter mouse strains to detect the ZGA event in embryos. We show that the majority of SCNT embryos do not undergo ZGA, and H3K27me3 prevents SCNT reprogramming. Overexpression of the H3K27me3‐specific demethylase KDM6A, but not of KDM6B, improves the efficiency of SCNT. Conversely, knockdown of KDM6B not only facilitates ZGA, but also impedes ectopic Xist expression in SCNT reprogramming. Furthermore, knockdown of KDM6B increases the rate of SCNT‐derived embryonic stem cells from Duchenne muscular dystrophy embryos. These results not only provide insight into the mechanisms underlying failures of SCNT, but also may extend the applications of SCNT.
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Affiliation(s)
- Lei Yang
- State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, China
| | - Lishuang Song
- State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, China.,Research Center for Mammalian Reproductive Biology and Biotechnology, College of Life Sciences, Inner Mongolia University, Hohhot, China
| | - Xuefei Liu
- State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, China
| | - Lige Bai
- State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, China.,Research Center for Mammalian Reproductive Biology and Biotechnology, College of Life Sciences, Inner Mongolia University, Hohhot, China
| | - Guangpeng Li
- State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, China .,Research Center for Mammalian Reproductive Biology and Biotechnology, College of Life Sciences, Inner Mongolia University, Hohhot, China
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24
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Somatic Cell Nuclear Transfer in Mice: Basic Protocol and Its Modification for Correcting X Chromosome Inactivation Status. Methods Mol Biol 2018. [PMID: 30218359 DOI: 10.1007/978-1-4939-8766-5_5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
Somatic cell nuclear transfer (SCNT) enables the production of animals from single cell nuclei. Unlike normally fertilized embryos, SCNT-derived embryos ectopically express the Xist gene from the maternal allele, because of the lack of Xist-repressing imprints in the somatic donor genome. This has severely compromised the development of SCNT-derived embryos, at least in mice. Here, we describe the basic protocol of mouse SCNT as well as a Xist knockdown SCNT procedure, which remarkably increases the efficiency of cloning mice.
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25
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Wójcikowska B, Botor M, Morończyk J, Wójcik AM, Nodzyński T, Karcz J, Gaj MD. Trichostatin A Triggers an Embryogenic Transition in Arabidopsis Explants via an Auxin-Related Pathway. FRONTIERS IN PLANT SCIENCE 2018; 9:1353. [PMID: 30271420 PMCID: PMC6146766 DOI: 10.3389/fpls.2018.01353] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2018] [Accepted: 08/28/2018] [Indexed: 05/23/2023]
Abstract
Auxin is an important regulator of plant ontogenies including embryo development and the exogenous application of this phytohormone has been found to be necessary for the induction of the embryogenic response in plant explants that have been cultured in vitro. However, in the present study, we show that treatment of Arabidopsis explants with trichostatin A (TSA), which is a chemical inhibitor of histone deacetylases, induces somatic embryogenesis (SE) without the exogenous application of auxin. We found that the TSA-treated explants generated somatic embryos that developed efficiently on the adaxial side of the cotyledons, which are the parts of an explant that are involved in auxin-induced SE. A substantial reduction in the activity of histone deacetylase (HDAC) was observed in the TSA-treated explants, thus confirming a histone acetylation-related mechanism of the TSA-promoted embryogenic response. Unexpectedly, the embryogenic effect of TSA was lower on the auxin-supplemented media and this finding further suggests an auxin-related mechanism of TSA-induced SE. Congruently, we found a significantly increased content of indolic compounds, which is indicative of IAA and an enhanced DR5::GUS signal in the TSA-treated explants. In line with these results, two of the YUCCA genes (YUC1 and YUC10), which are involved in auxin biosynthesis, were found to be distinctly up-regulated during TSA-induced SE and their expression was colocalised with the explant sites that are involved in SE. Beside auxin, ROS were extensively accumulated in response to TSA, thereby indicating that a stress-response is involved in TSA-triggered SE. Relevantly, we showed that the genes encoding the transcription factors (TFs) that have a regulatory function in auxin biosynthesis including LEC1, LEC2, BBM, and stress responses (MYB118) were highly up-regulated in the TSA-treated explants. Collectively, the results provide several pieces of evidence about the similarities between the molecular pathways of SE induction that are triggered by TSA and 2,4-D that involve the activation of the auxin-responsive TF genes that have a regulatory function in auxin biosynthesis and stress responses. The study suggests the involvement of histone acetylation in the auxin-mediated release of the embryogenic program of development in the somatic cells of Arabidopsis.
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Affiliation(s)
| | - Malwina Botor
- Department of Molecular Biology and Genetics, Medical University of SilesiaKatowice, Poland
| | - Joanna Morończyk
- Department of Genetics, University of Silesia in KatowiceKatowice, Poland
| | - Anna Maria Wójcik
- Department of Genetics, University of Silesia in KatowiceKatowice, Poland
| | - Tomasz Nodzyński
- Mendel Centre for Genomics and Proteomics of Plants Systems, CEITEC MU – Central European Institute of Technology, Masaryk UniversityBrno, Czechia
| | - Jagna Karcz
- Scanning Electron Microscopy Laboratory, University of Silesia in KatowiceKatowice, Poland
| | - Małgorzata D. Gaj
- Department of Genetics, University of Silesia in KatowiceKatowice, Poland
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26
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Abstract
Successful cloning of monkeys, the first non-human primate species, by somatic cell nuclear transfer (SCNT) attracted worldwide attention earlier this year. Remarkably, it has taken more than 20 years since the cloning of Dolly the sheep in 1997 to achieve this feat. This success was largely due to recent understanding of epigenetic barriers that impede SCNT-mediated reprogramming and the establishment of key methods to overcome these barriers, which also allowed efficient derivation of human pluripotent stem cells for cell therapy. Here, we summarize recent advances in SCNT technology and its potential applications for both reproductive and therapeutic cloning.
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Affiliation(s)
- Shogo Matoba
- RIKEN Bioresource Research Center, Tsukuba, Ibaraki 305-0074, Japan; Cooperative Division of Veterinary Sciences, Tokyo University of Agriculture and Technology, Fuchu, Tokyo 183-8509, Japan.
| | - Yi Zhang
- Howard Hughes Medical Institute; Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA 02115, USA; Department of Genetics, Harvard Medical School, Boston, MA 02115, USA; Harvard Stem Cell Institute, Boston, MA 02115, USA.
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27
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Li H, Gao S, Huang H, Liu W, Huang H, Liu X, Gao Y, Le R, Kou X, Zhao Y, Kou Z, Li J, Wang H, Zhang Y, Wang H, Cai T, Sun Q, Gao S, Han Z. High throughput sequencing identifies an imprinted gene, Grb10, associated with the pluripotency state in nuclear transfer embryonic stem cells. Oncotarget 2018; 8:47344-47355. [PMID: 28476045 PMCID: PMC5564569 DOI: 10.18632/oncotarget.17185] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Accepted: 03/24/2017] [Indexed: 02/05/2023] Open
Abstract
Somatic cell nuclear transfer and transcription factor mediated reprogramming are two widely used techniques for somatic cell reprogramming. Both fully reprogrammed nuclear transfer embryonic stem cells and induced pluripotent stem cells hold potential for regenerative medicine, and evaluation of the stem cell pluripotency state is crucial for these applications. Previous reports have shown that the Dlk1-Dio3 region is associated with pluripotency in induced pluripotent stem cells and the incomplete somatic cell reprogramming causes abnormally elevated levels of genomic 5-methylcytosine in induced pluripotent stem cells compared to nuclear transfer embryonic stem cells and embryonic stem cells. In this study, we compared pluripotency associated genes Rian and Gtl2 in the Dlk1-Dio3 region in exactly syngeneic nuclear transfer embryonic stem cells and induced pluripotent stem cells with same genomic insertion. We also assessed 5-methylcytosine and 5-hydroxymethylcytosine levels and performed high-throughput sequencing in these cells. Our results showed that Rian and Gtl2 in the Dlk1-Dio3 region related to pluripotency in induced pluripotent stem cells did not correlate with the genes in nuclear transfer embryonic stem cells, and no significant difference in 5-methylcytosine and 5-hydroxymethylcytosine levels were observed between fully and partially reprogrammed nuclear transfer embryonic stem cells and induced pluripotent stem cells. Through syngeneic comparison, our study identifies for the first time that Grb10 is associated with the pluripotency state in nuclear transfer embryonic stem cells.
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Affiliation(s)
- Hui Li
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, People's Republic of China.,University of Chinese Academy of Sciences, Chinese Academy of Science, Beijing, People's Republic of China.,National Institute of Biological Sciences, NIBS, Beijing, People's Republic of China
| | - Shuai Gao
- National Institute of Biological Sciences, NIBS, Beijing, People's Republic of China
| | - Hua Huang
- State Key Laboratory of Environment Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Science, Beijing, People's Republic of China
| | - Wenqiang Liu
- Clinical and Translational Research Center of Shanghai First Maternity & Infant Hospital, School of Life Sciences and Technology, Tongji University, Shanghai, People's Republic of China
| | - Huanwei Huang
- National Institute of Biological Sciences, NIBS, Beijing, People's Republic of China
| | - Xiaoyu Liu
- Clinical and Translational Research Center of Shanghai First Maternity & Infant Hospital, School of Life Sciences and Technology, Tongji University, Shanghai, People's Republic of China
| | - Yawei Gao
- Clinical and Translational Research Center of Shanghai First Maternity & Infant Hospital, School of Life Sciences and Technology, Tongji University, Shanghai, People's Republic of China
| | - Rongrong Le
- Clinical and Translational Research Center of Shanghai First Maternity & Infant Hospital, School of Life Sciences and Technology, Tongji University, Shanghai, People's Republic of China
| | - Xiaochen Kou
- Clinical and Translational Research Center of Shanghai First Maternity & Infant Hospital, School of Life Sciences and Technology, Tongji University, Shanghai, People's Republic of China
| | - Yanhong Zhao
- Clinical and Translational Research Center of Shanghai First Maternity & Infant Hospital, School of Life Sciences and Technology, Tongji University, Shanghai, People's Republic of China
| | - Zhaohui Kou
- National Institute of Biological Sciences, NIBS, Beijing, People's Republic of China
| | - Jia Li
- National Institute of Biological Sciences, NIBS, Beijing, People's Republic of China
| | - Hong Wang
- Clinical and Translational Research Center of Shanghai First Maternity & Infant Hospital, School of Life Sciences and Technology, Tongji University, Shanghai, People's Republic of China
| | - Yu Zhang
- National Institute of Biological Sciences, NIBS, Beijing, People's Republic of China
| | - Hailin Wang
- University of Chinese Academy of Sciences, Chinese Academy of Science, Beijing, People's Republic of China.,State Key Laboratory of Environment Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Science, Beijing, People's Republic of China
| | - Tao Cai
- National Institute of Biological Sciences, NIBS, Beijing, People's Republic of China
| | - Qingyuan Sun
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, People's Republic of China.,University of Chinese Academy of Sciences, Chinese Academy of Science, Beijing, People's Republic of China
| | - Shaorong Gao
- Clinical and Translational Research Center of Shanghai First Maternity & Infant Hospital, School of Life Sciences and Technology, Tongji University, Shanghai, People's Republic of China
| | - Zhiming Han
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, People's Republic of China
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28
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Adamkova K, Yi YJ, Petr J, Zalmanova T, Hoskova K, Jelinkova P, Moravec J, Kralickova M, Sutovsky M, Sutovsky P, Nevoral J. SIRT1-dependent modulation of methylation and acetylation of histone H3 on lysine 9 (H3K9) in the zygotic pronuclei improves porcine embryo development. J Anim Sci Biotechnol 2017; 8:83. [PMID: 29118980 PMCID: PMC5664433 DOI: 10.1186/s40104-017-0214-0] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Accepted: 09/25/2017] [Indexed: 12/31/2022] Open
Abstract
Background The histone code is an established epigenetic regulator of early embryonic development in mammals. The lysine residue K9 of histone H3 (H3K9) is a prime target of SIRT1, a member of NAD+-dependent histone deacetylase family of enzymes targeting both histone and non-histone substrates. At present, little is known about SIRT1-modulation of H3K9 in zygotic pronuclei and its association with the success of preimplantation embryo development. Therefore, we evaluated the effect of SIRT1 activity on H3K9 methylation and acetylation in porcine zygotes and the significance of H3K9 modifications for early embryonic development. Results Our results show that SIRT1 activators resveratrol and BML-278 increased H3K9 methylation and suppressed H3K9 acetylation in both the paternal and maternal pronucleus. Inversely, SIRT1 inhibitors nicotinamide and sirtinol suppressed methylation and increased acetylation of pronuclear H3K9. Evaluation of early embryonic development confirmed positive effect of selective SIRT1 activation on blastocyst formation rate (5.2 ± 2.9% versus 32.9 ± 8.1% in vehicle control and BML-278 group, respectively; P ≤ 0.05). Stimulation of SIRT1 activity coincided with fluorometric signal intensity of ooplasmic ubiquitin ligase MDM2, a known substrate of SIRT1 and known limiting factor of epigenome remodeling. Conclusions We conclude that SIRT1 modulates zygotic histone code, obviously through direct deacetylation and via non-histone targets resulting in increased H3K9me3. These changes in zygotes lead to more successful pre-implantation embryonic development and, indeed, the specific SIRT1 activation due to BML-278 is beneficial for in vitro embryo production and blastocyst achievement.
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Affiliation(s)
- Katerina Adamkova
- Department of Veterinary Sciences, Faculty of Agriculture, Food and Natural Resources, Czech University of Life Sciences Prague, 6-Suchdol, Prague, Czech Republic
| | - Young-Joo Yi
- Division of Biotechnology, Safety, Environment and Life Science Institute, College of Environmental and Bioresource Sciences, Chonbuk National University, Iksan, 54596 South Korea
| | - Jaroslav Petr
- Institute of Animal Science, 10-Uhrineves, Prague, Czech Republic
| | - Tereza Zalmanova
- Department of Veterinary Sciences, Faculty of Agriculture, Food and Natural Resources, Czech University of Life Sciences Prague, 6-Suchdol, Prague, Czech Republic.,Institute of Animal Science, 10-Uhrineves, Prague, Czech Republic
| | - Kristyna Hoskova
- Department of Veterinary Sciences, Faculty of Agriculture, Food and Natural Resources, Czech University of Life Sciences Prague, 6-Suchdol, Prague, Czech Republic.,Institute of Animal Science, 10-Uhrineves, Prague, Czech Republic
| | - Pavla Jelinkova
- Department of Veterinary Sciences, Faculty of Agriculture, Food and Natural Resources, Czech University of Life Sciences Prague, 6-Suchdol, Prague, Czech Republic
| | - Jiri Moravec
- Proteomic Laboratory, Biomedical Center of Faculty of Medicine in Pilsen, Charles University, Pilsen, Czech Republic
| | - Milena Kralickova
- Laboratory of Reproductive Medicine of Biomedical Center, Charles University, Pilsen, Czech Republic.,Department of Histology and Embryology, Faculty of Medicine in Pilsen, Charles University, Pilsen, Czech Republic
| | - Miriam Sutovsky
- Division of Animal Science, University of Missouri, Columbia, MO USA
| | - Peter Sutovsky
- Division of Animal Science, University of Missouri, Columbia, MO USA.,Departments of Obstetrics, Gynecology and Women's Health, University of Missouri, Columbia, MO USA
| | - Jan Nevoral
- Department of Veterinary Sciences, Faculty of Agriculture, Food and Natural Resources, Czech University of Life Sciences Prague, 6-Suchdol, Prague, Czech Republic.,Laboratory of Reproductive Medicine of Biomedical Center, Charles University, Pilsen, Czech Republic.,Department of Histology and Embryology, Faculty of Medicine in Pilsen, Charles University, Pilsen, Czech Republic
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29
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Miyamoto K, Tajima Y, Yoshida K, Oikawa M, Azuma R, Allen GE, Tsujikawa T, Tsukaguchi T, Bradshaw CR, Jullien J, Yamagata K, Matsumoto K, Anzai M, Imai H, Gurdon JB, Yamada M. Reprogramming towards totipotency is greatly facilitated by synergistic effects of small molecules. Biol Open 2017; 6:415-424. [PMID: 28412714 PMCID: PMC5399555 DOI: 10.1242/bio.023473] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Animal cloning has been achieved in many species by transplanting differentiated cell nuclei to unfertilized oocytes. However, the low efficiencies of cloning have remained an unresolved issue. Here we find that the combination of two small molecules, trichostatin A (TSA) and vitamin C (VC), under culture condition with bovine serum albumin deionized by ion-exchange resins, dramatically improves the cloning efficiency in mice and 15% of cloned embryos develop to term by means of somatic cell nuclear transfer (SCNT). The improvement was not observed by adding the non-treated, rather than deionized, bovine serum. RNA-seq analyses of SCNT embryos at the two-cell stage revealed that the treatment with TSA and VC resulted in the upregulated expression of previously identified reprogramming-resistant genes. Moreover, the expression of early-embryo-specific retroelements was upregulated by the TSA and VC treatment. The enhanced gene expression was relevant to the VC-mediated reduction of histone H3 lysine 9 methylation in SCNT embryos. Our study thus shows a simply applicable method to greatly improve mouse cloning efficiency, and furthers our understanding of how somatic nuclei acquire totipotency. Summary: The optimized culture condition with small molecules is sufficient to allow highly efficient mouse cloning by removing epigenetic barriers to reprogramming.
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Affiliation(s)
- Kei Miyamoto
- Wellcome Trust/Cancer Research UK Gurdon Institute, University of Cambridge, Tennis Court Road, Cambridge CB2 1QN, UK .,Laboratory of Molecular Developmental Biology, Graduate School of Biology-Oriented Science and Technology, Kindai University, Wakayama 649-6493, Japan
| | - Yosuke Tajima
- Laboratory of Reproductive Biology, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan
| | - Koki Yoshida
- Laboratory of Reproductive Biology, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan
| | - Mami Oikawa
- Wellcome Trust/Cancer Research UK Gurdon Institute, University of Cambridge, Tennis Court Road, Cambridge CB2 1QN, UK.,Laboratory of Molecular Developmental Biology, Graduate School of Biology-Oriented Science and Technology, Kindai University, Wakayama 649-6493, Japan
| | - Rika Azuma
- Laboratory of Molecular Developmental Biology, Graduate School of Biology-Oriented Science and Technology, Kindai University, Wakayama 649-6493, Japan.,Institute of Advanced Technology, Kindai University, Wakayama 642-0017, Japan
| | - George E Allen
- Wellcome Trust/Cancer Research UK Gurdon Institute, University of Cambridge, Tennis Court Road, Cambridge CB2 1QN, UK
| | - Tomomi Tsujikawa
- Laboratory of Reproductive Biology, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan
| | - Tomomasa Tsukaguchi
- Laboratory of Molecular Developmental Biology, Graduate School of Biology-Oriented Science and Technology, Kindai University, Wakayama 649-6493, Japan
| | - Charles R Bradshaw
- Wellcome Trust/Cancer Research UK Gurdon Institute, University of Cambridge, Tennis Court Road, Cambridge CB2 1QN, UK
| | - Jerome Jullien
- Wellcome Trust/Cancer Research UK Gurdon Institute, University of Cambridge, Tennis Court Road, Cambridge CB2 1QN, UK
| | - Kazuo Yamagata
- Laboratory of Molecular Developmental Biology, Graduate School of Biology-Oriented Science and Technology, Kindai University, Wakayama 649-6493, Japan
| | - Kazuya Matsumoto
- Laboratory of Molecular Developmental Biology, Graduate School of Biology-Oriented Science and Technology, Kindai University, Wakayama 649-6493, Japan
| | - Masayuki Anzai
- Institute of Advanced Technology, Kindai University, Wakayama 642-0017, Japan
| | - Hiroshi Imai
- Laboratory of Reproductive Biology, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan
| | - John B Gurdon
- Wellcome Trust/Cancer Research UK Gurdon Institute, University of Cambridge, Tennis Court Road, Cambridge CB2 1QN, UK
| | - Masayasu Yamada
- Laboratory of Reproductive Biology, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan
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30
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Abstract
Reproductive engineering techniques are essential for assisted reproduction of animals
and generation of genetically modified animals. They may also provide invaluable research
models for understanding the mechanisms involved in the developmental and reproductive
processes. At the RIKEN BioResource Center (BRC), I have sought to develop new
reproductive engineering techniques, especially those related to cryopreservation,
microinsemination (sperm injection), nuclear transfer, and generation of new stem cell
lines and animals, hoping that they will support the present and future projects at BRC. I
also want to combine our techniques with genetic and biochemical analyses to solve
important biological questions. We expect that this strategy makes our research more
unique and refined by providing deeper insights into the mechanisms that govern the
reproductive and developmental systems in mammals. To make this strategy more effective,
it is critical to work with experts in different scientific fields. I have enjoyed
collaborations with about 100 world-recognized laboratories, and all our collaborations
have been successful and fruitful. This review summarizes development of reproductive
engineering techniques at BRC during these 15 years.
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Affiliation(s)
- Atsuo Ogura
- RIKEN BioResource Center, Tsukuba, Ibaraki 305-0074, Japan
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31
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Loi P, Iuso D, Czernik M, Ogura A. A New, Dynamic Era for Somatic Cell Nuclear Transfer? Trends Biotechnol 2016; 34:791-797. [PMID: 27118511 DOI: 10.1016/j.tibtech.2016.03.008] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2016] [Revised: 03/16/2016] [Accepted: 03/28/2016] [Indexed: 01/24/2023]
Abstract
Cloning animals by somatic cell nuclear transfer (SCNT) has remained an uncontrollable process for many years. High rates of embryonic losses, stillbirths, and postnatal mortality have been typical outcomes. These developmental problems arise from abnormal genomic reprogramming: the capacity of the oocyte to reset the differentiated memory of a somatic cell. However, effective reprogramming strategies are now available. These target the whole genome or single domains such as the Xist gene, and their effectiveness has been validated with the ability of experimental animals to develop to term. Thus, SCNT has become a controllable process that can be used to 'rescue' endangered species, and for biomedical research such as therapeutic cloning and the isolation of induced pluripotent stem cells (iPSCs).
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Affiliation(s)
- Pasqualino Loi
- Faculty of Veterinary Medicine, University of Teramo, Campus Sant'Agostino, Via Balzarini 1, 64100 Teramo, Italy.
| | - Domenico Iuso
- Faculty of Veterinary Medicine, University of Teramo, Campus Sant'Agostino, Via Balzarini 1, 64100 Teramo, Italy
| | - Marta Czernik
- Faculty of Veterinary Medicine, University of Teramo, Campus Sant'Agostino, Via Balzarini 1, 64100 Teramo, Italy
| | - Atsuo Ogura
- RIKEN BioResource Center, Tsukuba, Ibaraki 305-0074, Japan
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