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Kagan F, Hejnol A. Comparative Analysis of Maternal Gene Expression Patterns Unravels Evolutionary Signatures Across Reproductive Modes. Mol Biol Evol 2024; 41:msae081. [PMID: 38679468 DOI: 10.1093/molbev/msae081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 03/09/2024] [Accepted: 04/23/2024] [Indexed: 05/01/2024] Open
Abstract
Maternal genes have a pivotal role in regulating metazoan early development. As such their functions have been extensively studied since the dawn of developmental biology. The temporal and spatial dynamics of their transcripts have been thoroughly described in model organisms and their functions have been undergoing heavy investigations. Yet, less is known about the evolutionary changes shaping their presence within diverse oocytes. Due to their unique maternal inheritance pattern, a high degree is predicted to be present when it comes to their expression. Insofar only limited and conflicting results have emerged around it. Here, we set out to elucidate which evolutionary changes could be detected in the maternal gene expression patterns using phylogenetic comparative methods on RNAseq data from 43 species. Using normalized gene expression values and fold change information throughout early development we set out to find the best-fitting evolutionary model. Through modeling, we find evidence supporting both the high degree of divergence and constraint on gene expression values, together with their temporal dynamics. Furthermore, we find that maternal gene expression alone can be used to explain the reproductive modes of different species. Together, these results suggest a highly dynamic evolutionary landscape of maternal gene expression. We also propose a possible functional dichotomy of maternal genes which is influenced by the reproductive strategy undertaken by examined species.
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Affiliation(s)
- Ferenc Kagan
- Department of Biological Sciences, University of Bergen, Bergen, Norway
| | - Andreas Hejnol
- Department of Biological Sciences, University of Bergen, Bergen, Norway
- Faculty of Biological Sciences, Friedrich Schiller University, Institute for Zoology and Evolutionary Research, Jena, Germany
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2
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Uysal F, Sukur G, Bozdemir N, Cinar O. Unveiling the impact of DNA methylation machinery: Dnmt1 and Dnmt3a in orchestrating oocyte development and cellular homeostasis. Genesis 2024; 62:e23579. [PMID: 37985411 DOI: 10.1002/dvg.23579] [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: 09/30/2023] [Revised: 10/27/2023] [Accepted: 11/02/2023] [Indexed: 11/22/2023]
Abstract
DNA methylation can be considered the most prominent in controlling the gene expression responsible for the balance between cell proliferation and cell death. In this study, we aimed to analyze the distinct contributions of Dnmt1 and Dnmt3a enzymes in oocyte maturation, survival, autophagy, reactive oxygen species (ROS) production, and compensation capacity of Dnmt3b and Dnmt3l enzymes in mouse oocytes. Following confirming the suppression of Dnmt1or Dnmt3a through siRNA application, the assessment involved immunofluorescence staining for Dnmts, 5mC, p62, and ROS levels. Cell death rates showed a noticeable increase while oocyte maturation rates exhibited significant reduction. Global DNA methylation showed a decline, concomitant with elevated p62 and ROS levels upon Dnmt1 or Dnmt3a knockdown. Remarkably, silencing of Dnmt1 led to an upsurge in Dnmt3a expression, whereas Dnmt3a knockdown triggered an increase in Dnmt1 levels. Furthermore, Dnmt3l expression exhibited a notable decrease after silencing of either Dnmt1 or Dnmt3a, while Dnmt3b levels remained comparable between control and siRNA-treated groups. Collectively, this study underscores the pivotal roles of Dnmt1 and Dnmt3a in orchestrating various facets of oocyte development, encompassing maturation, survival, autophagy, and ROS production. These findings offer valuable insights into the intricate regulatory network governed by DNA methylation machinery within the context of oocyte physiology.
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Affiliation(s)
- Fatma Uysal
- Department of Histology and Embryology, Ankara Medipol University School of Medicine, Ankara, Turkey
| | - Gozde Sukur
- Department of Histology and Embryology, Ankara University School of Medicine, Ankara, Turkey
| | - Nazlican Bozdemir
- Department of Histology and Embryology, Ankara Medipol University School of Medicine, Ankara, Turkey
| | - Ozgur Cinar
- Department of Histology and Embryology, Ankara University School of Medicine, Ankara, Turkey
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3
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Mo L, Ma J, Xiong Y, Xiong X, Lan D, Li J, Yin S. Factors Influencing the Maturation and Developmental Competence of Yak ( Bos grunniens) Oocytes In Vitro. Genes (Basel) 2023; 14:1882. [PMID: 37895231 PMCID: PMC10606142 DOI: 10.3390/genes14101882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 09/17/2023] [Accepted: 09/25/2023] [Indexed: 10/29/2023] Open
Abstract
The yak (Bos grunniens) is a unique breed living on the Qinghai-Tibet Plateau and its surrounding areas, providing locals with a variety of vital means of living and production. However, the yak has poor sexual maturity and low fertility. High-quality mature oocytes are the basis of animal breeding technology. Recently, in vitro culturing of oocytes and embryo engineering technology have been applied to yak breeding. However, compared to those observed in vivo, the maturation rate and developmental capacity of in vitro oocytes are still low, which severely limits the application of in vitro fertilization and embryo production in yaks. This review summarizes the endogenous and exogenous factors affecting the in vitro maturation (IVM) and developmental ability of yak oocytes reported in recent years and provides a theoretical basis for obtaining high-quality oocytes for in vitro fertilization and embryo production in yaks.
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Affiliation(s)
- Luoyu Mo
- College of Animal and Veterinary Sciences, Southwest Minzu University, Chengdu 610041, China; (L.M.); (J.M.); (Y.X.); (X.X.); (D.L.); (J.L.)
| | - Jun Ma
- College of Animal and Veterinary Sciences, Southwest Minzu University, Chengdu 610041, China; (L.M.); (J.M.); (Y.X.); (X.X.); (D.L.); (J.L.)
| | - Yan Xiong
- College of Animal and Veterinary Sciences, Southwest Minzu University, Chengdu 610041, China; (L.M.); (J.M.); (Y.X.); (X.X.); (D.L.); (J.L.)
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization, Ministry of Education, Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization Key Laboratory of Sichuan Province, Chengdu 610041, China
- Key Laboratory of Animal Science of National Ethnic Affairs Commission of China, Southwest Minzu University, Chengdu 610041, China
| | - Xianrong Xiong
- College of Animal and Veterinary Sciences, Southwest Minzu University, Chengdu 610041, China; (L.M.); (J.M.); (Y.X.); (X.X.); (D.L.); (J.L.)
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization, Ministry of Education, Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization Key Laboratory of Sichuan Province, Chengdu 610041, China
- Key Laboratory of Animal Science of National Ethnic Affairs Commission of China, Southwest Minzu University, Chengdu 610041, China
| | - Daoliang Lan
- College of Animal and Veterinary Sciences, Southwest Minzu University, Chengdu 610041, China; (L.M.); (J.M.); (Y.X.); (X.X.); (D.L.); (J.L.)
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization, Ministry of Education, Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization Key Laboratory of Sichuan Province, Chengdu 610041, China
- Key Laboratory of Animal Science of National Ethnic Affairs Commission of China, Southwest Minzu University, Chengdu 610041, China
| | - Jian Li
- College of Animal and Veterinary Sciences, Southwest Minzu University, Chengdu 610041, China; (L.M.); (J.M.); (Y.X.); (X.X.); (D.L.); (J.L.)
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization, Ministry of Education, Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization Key Laboratory of Sichuan Province, Chengdu 610041, China
- Key Laboratory of Animal Science of National Ethnic Affairs Commission of China, Southwest Minzu University, Chengdu 610041, China
| | - Shi Yin
- College of Animal and Veterinary Sciences, Southwest Minzu University, Chengdu 610041, China; (L.M.); (J.M.); (Y.X.); (X.X.); (D.L.); (J.L.)
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization, Ministry of Education, Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization Key Laboratory of Sichuan Province, Chengdu 610041, China
- Key Laboratory of Animal Science of National Ethnic Affairs Commission of China, Southwest Minzu University, Chengdu 610041, China
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4
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Vargas LN, Silveira MM, Franco MM. Epigenetic Reprogramming and Somatic Cell Nuclear Transfer. Methods Mol Biol 2023; 2647:37-58. [PMID: 37041328 DOI: 10.1007/978-1-0716-3064-8_2] [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
Epigenetics is an area of genetics that studies the heritable modifications in gene expression and phenotype that are not controlled by the primary sequence of DNA. The main epigenetic mechanisms are DNA methylation, post-translational covalent modifications in histone tails, and non-coding RNAs. During mammalian development, there are two global waves of epigenetic reprogramming. The first one occurs during gametogenesis and the second one begins immediately after fertilization. Environmental factors such as exposure to pollutants, unbalanced nutrition, behavioral factors, stress, in vitro culture conditions can negatively affect epigenetic reprogramming events. In this review, we describe the main epigenetic mechanisms found during mammalian preimplantation development (e.g., genomic imprinting, X chromosome inactivation). Moreover, we discuss the detrimental effects of cloning by somatic cell nuclear transfer on the reprogramming of epigenetic patterns and some molecular alternatives to minimize these negative impacts.
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Affiliation(s)
- Luna N Vargas
- Laboratory of Animal Reproduction, Embrapa Genetic Resources and Biotechnology, Brasília, Distrito Federal, Brazil
- Institute of Biotechnology, Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil
| | - Márcia M Silveira
- Laboratory of Animal Reproduction, Embrapa Genetic Resources and Biotechnology, Brasília, Distrito Federal, Brazil
- Institute of Biotechnology, Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil
| | - Maurício M Franco
- Laboratory of Animal Reproduction, Embrapa Genetic Resources and Biotechnology, Brasília, Distrito Federal, Brazil.
- Institute of Biotechnology, Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil.
- School of Veterinary Medicine, Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil.
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Li Q, Zhao T, He H, Robert N, Ding T, Hu X, Zhang T, Pan Y, Cui Y, Yu S. Ascorbic acid protects the toxic effects of aflatoxin B 1 on yak oocyte maturation. Anim Sci J 2022; 93:e13702. [PMID: 35257449 DOI: 10.1111/asj.13702] [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: 09/26/2021] [Revised: 01/26/2022] [Accepted: 02/03/2022] [Indexed: 11/29/2022]
Abstract
High-quality oocytes are a prerequisite for successful fertilization. Mammals feeding on aflatoxin-contaminated feed can cause reproductive toxicity, including follicular atresia, poor oocyte development and maturation, and aberrant epigenetic modifications of oocytes. In addition, the important role of ascorbic acid (AA) in reproductive biology has been confirmed, and AA is widely used as an antioxidant in cell culture. However, the toxic effects of aflatoxin B1 (AFB1 ) on yak oocytes and whether AA has protective effects remain unknown. In this study, we found that exposure to AFB1 impedes meiotic maturation of oocytes, promotes apoptosis by triggering high levels of reactive oxygen species (ROS), and disrupts mitochondrial distribution and actin integrity, resulting in a decrease in the fertilization ability and parthenogenetic development ability of oocytes. In addition, these injuries changed the DNA methylation transferase transcription level of mature oocytes. After adding 50 μg/ml AA, the indices recovered to levels close to those of the control group. The results showed that AA could protect yak oocytes from the toxic effects of AFB1 and improve the quality of oocytes.
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Affiliation(s)
- Qin Li
- Gansu Province Livestock Embryo Engineering Research Center, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Tian Zhao
- Gansu Province Livestock Embryo Engineering Research Center, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Honghong He
- Gansu Province Livestock Embryo Engineering Research Center, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Niayale Robert
- Laboratory of Animal Anatomy & Tissue Embryology, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Tianyi Ding
- Gansu Province Livestock Embryo Engineering Research Center, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Xuequan Hu
- Gansu Province Livestock Embryo Engineering Research Center, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Tongxiang Zhang
- Gansu Province Livestock Embryo Engineering Research Center, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Yangyang Pan
- Gansu Province Livestock Embryo Engineering Research Center, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Yan Cui
- Laboratory of Animal Anatomy & Tissue Embryology, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Sijiu Yu
- Gansu Province Livestock Embryo Engineering Research Center, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
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6
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Ornoy A, Weinstein-Fudim L, Becker M. SAMe, Choline, and Valproic Acid as Possible Epigenetic Drugs: Their Effects in Pregnancy with a Special Emphasis on Animal Studies. Pharmaceuticals (Basel) 2022; 15:192. [PMID: 35215304 PMCID: PMC8879727 DOI: 10.3390/ph15020192] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Revised: 01/27/2022] [Accepted: 01/28/2022] [Indexed: 11/29/2022] Open
Abstract
In this review, we discuss the functions and main effects on pregnancy outcomes of three agents that have the ability to induce epigenetic modifications: valproic acid (VPA), a well-known teratogen that is a histone deacetylase inhibitor; S-adenosylmethionine (SAMe), the most effective methyl donor; and choline, an important micronutrient involved in the one methyl group cycle and in the synthesis of SAMe. Our aim was to describe the possible effects of these compounds when administered during pregnancy on the developing embryo and fetus or, if administered postnatally, their effects on the developing child. These substances are able to modify gene expression and possibly alleviate neurobehavioral changes in disturbances that have epigenetic origins, such as autism spectrum disorder (ASD), depression, Rett syndrome, and fetal alcohol spectrum disorder (FASD). Valproic acid and SAMe are antagonistic epigenetic modulators whether administered in utero or postnatally. However, VPA is a major human teratogen and, whenever possible, should not be used by pregnant women. Most currently relevant data come from experimental animal studies that aimed to explore the possibility of using these substances as epigenetic modifiers and possible therapeutic agents. In experimental animals, each of these substances was able to alleviate the severity of several well-known diseases by inducing changes in the expression of affected genes or by other yet unknown mechanisms. We believe that additional studies are needed to further explore the possibility of using these substances, and similar compounds, for the treatment of "epigenetic human diseases".
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Affiliation(s)
- Asher Ornoy
- Adelson School of Medicine, Ariel University, Ariel 40700, Israel;
- Department of Medical Neurobiology, Hebrew University Hadassah Medical School, Jerusalem 9112102, Israel;
| | - Liza Weinstein-Fudim
- Department of Medical Neurobiology, Hebrew University Hadassah Medical School, Jerusalem 9112102, Israel;
| | - Maria Becker
- Adelson School of Medicine, Ariel University, Ariel 40700, Israel;
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7
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Uysal F, Cinar O, Can A. Knockdown of Dnmt1 and Dnmt3a gene expression disrupts preimplantation embryo development through global DNA methylation. J Assist Reprod Genet 2021; 38:3135-3144. [PMID: 34533678 DOI: 10.1007/s10815-021-02316-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2021] [Accepted: 09/08/2021] [Indexed: 11/24/2022] Open
Abstract
PURPOSE DNA methylation is one of the epigenetic mechanisms that plays critical roles in preimplantation embryo development executed by DNA methyltransferase (Dnmt) enzymes. Dnmt1, responsible for the maintenance of methylation, and Dnmt3a, for de novo methylation, are gradually erased from the zygote in succeeding stages and then reestablished in the blastocyst. This study was designed to address the vital role of Dnmt1 and Dnmt3a enzymes by silencing their gene expressions in embryonic development in mice. METHODS Groups were (i) control, (ii) Dnmt1-siRNA, (iii) Dnmt3a-siRNA, and (iv) non-targeted (NT) siRNA. Knockdown of Dnmt genes using siRNAs was confirmed by measuring the targeted proteins using Western blot and immunofluorescence. Following knockdown of Dnmt1 and Dnmt3a in zygotes, the developmental competence and global DNA methylation levels were analyzed after 96 h in embryo cultures. RESULTS A significant number of embryos arrested at the 2-cell stage or had undergone degeneration in the Dnmt1 and Dnmt3a knocked-down groups. By 3D observations in super-resolution microscopy, we noted that Dnmt1 was exclusively found in juxtanuclear cytoplasm, while the Dnmt3a signal was preferentially localized in the nucleus, both in trophoblasts (TBs) and embryoblasts (EBs). Interestingly, the global DNA methylation level decreased in the Dnmt1 knockdown group, while it increased in the Dnmt3a knockdown group. CONCLUSION Precisely aligned expression of Dnmt genes is highly essential for the fate of an embryo in the early developmental period. Our data indicates that further analysis is mandatory to designate the specific targets of these methylation/demethylation processes in mouse and human preimplantation embryos.
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Affiliation(s)
- Fatma Uysal
- Laboratory for Stem Cells and Reproductive Cell Biology, Department of Histology and Embryology, Ankara University School of Medicine, Ankara, Turkey
| | - Ozgur Cinar
- Laboratory for Stem Cells and Reproductive Cell Biology, Department of Histology and Embryology, Ankara University School of Medicine, Ankara, Turkey
| | - Alp Can
- Laboratory for Stem Cells and Reproductive Cell Biology, Department of Histology and Embryology, Ankara University School of Medicine, Ankara, Turkey.
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Toorani T, Mackie PM, Mastromonaco GF. Investigating Markers of Reprogramming Potential in Somatic Cell Lines Derived from Matched Donors. Cell Reprogram 2021; 23:73-88. [PMID: 33861640 DOI: 10.1089/cell.2020.0075] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Somatic cell biobanking and related technologies, somatic cell nuclear transfer (SCNT), and induction of pluripotent stem cells offer significant promise for wildlife conservation, but have yet to achieve optimal success. Inefficiency and variability in outcome have been linked to incomplete nuclear reprogramming, highlighting the importance of donor cell contribution. Studies show significant differences in SCNT outcome in donor cell lines within and between individuals, highlighting the necessity for a standardized characterization method to evaluate cell line reprogramming potential. Stringently standardized bovine fibroblast cell lines were generated and assessed for inter- and intraindividual variability on cellular (morphology, chromosome number, apoptotic incidence; Experiment 1) and molecular (pluripotency and epigenetic-related gene expression; Experiment 2) levels encompassing putative biomarkers of reprogramming potential. Cellular parameters were similar across cell lines. While some statistically significant differences were observed in DNMT1, DNMT3B, and HAT1, but not HDAC1, their biological relevance could not be determined with the information at hand. This study lays the foundation for understanding cellular characteristics in cultured cell lines; however, further studies are required to determine any correlation with reprogramming potential.
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Affiliation(s)
- Tahmineh Toorani
- Reproductive Sciences, Toronto Zoo, Scarborough, Canada.,Department of Biomedical Sciences, Ontario Veterinary College, University of Guelph, Guelph, Canada
| | | | - Gabriela F Mastromonaco
- Reproductive Sciences, Toronto Zoo, Scarborough, Canada.,Department of Biomedical Sciences, Ontario Veterinary College, University of Guelph, Guelph, Canada
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9
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Salehi M, Abouhamzeh B, Hosseini A, Zare Z, Bakhtari A. Comparison of Epigenetic Modifier Genes in Bovine Adipose Tissue-Derived Stem Cell Based Embryos, as Donors, with In Vitro and Parthenogenesis Embryos. CELL JOURNAL 2019; 22:149-157. [PMID: 31721528 PMCID: PMC6874790 DOI: 10.22074/cellj.2020.6714] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Accepted: 03/13/2019] [Indexed: 11/28/2022]
Abstract
Objective Regarding that undifferentiated mesenchymal stem cells, as donor cells, require less epigenetic
reprogramming, possibility of using bovine adipose tissue-derived stem cells (BASCs) with low level of DNMTs and
HDACs expression was evaluated.
Materials and Methods In this experimental study, we examined gene expression of epigenetic modifiers including
DNA methyltransferases (DNMT1, DNMT3A and DNMT3B) and histone deacetylases (HDAC1-3), as well as protein
levels of histone H3 acetylation at lysine 9 (H3K9ac) and POU5F1 (also known as OCT4) at two stages of preimplantation
development among in vitro fertilization (IVF), parthenogenetic activation (PA) and somatic cell nuclear transfer (SCNT)
groups.
Results The results revealed that developmental competence of IVF embryos was higher than SCNT embryos
(P<0.05). In the PA and SCNT groups, DNMT1, HDAC2 and HDAC3 mRNA were overexpressed (P<0.05), and proteins
levels of H3K9ac and POU5F1 were reduced at 6-8 cells and blastocyst stages compared to IVF (P<0.05). The mRNA
expression of DNMT1 an<0.05) in both developmental stages (except HDAC1 in blastocyst stage).
Conclusion The SCNT embryos derived from BASCs have endured considerable nuclear reprogramming during early
embryo development. Comparison of PA and SCNT blastocysts demonstrated that HDAC1 and DNMT1 may attribute to
developmental competence variability of bovine embryos.
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Affiliation(s)
- Mohammad Salehi
- Cellular and Molecular Biology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.,Department of Biotechnology, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Beheshteh Abouhamzeh
- Department of Anatomical Sciences, Faculty of Medicine, AJA University of Medical Sciences, Tehran, Iran. Elevtronic Address:
| | - Ahmad Hosseini
- Cellular and Molecular Biology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Zohreh Zare
- Department of Anatomical Sciences, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Azizollah Bakhtari
- Department of Reproductive Biology, School of Advanced Medical Sciences and Technologies, Shiraz University of Medical Sciences, Shiraz, Iran
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10
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Cellular Mechanisms and Epigenetic Changes: Role of Nutrition in Livestock. Vet Clin North Am Food Anim Pract 2019; 35:249-263. [PMID: 31103179 DOI: 10.1016/j.cvfa.2018.12.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
In the context of physiologic responses that determine the growth, development, and health status of livestock, the role of epigenetics and the underlying cellular mechanisms it affects remain to be fully elucidated. Although recent work has provided evidence that maternal dietary energy level, carbohydrate type, or intestinal supply of methyl donors can elicit molecular changes in tissues of the embryo, fetus, or neonate, there are few data linking epigenetics with biochemical and physiologic outcomes. Therefore, efforts linking the epigenome with physiologic and developmental outcomes offer exciting opportunities for discoveries that can impact efficiency of nutrient use and well-being of livestock.
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11
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Martinez-Redondo P, Izpisua Belmonte JC. Tailored chromatin modulation to promote tissue regeneration. Semin Cell Dev Biol 2019; 97:3-15. [PMID: 31028854 DOI: 10.1016/j.semcdb.2019.04.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 04/22/2019] [Accepted: 04/22/2019] [Indexed: 12/16/2022]
Abstract
Epigenetic regulation of gene expression is fundamental in the maintenance of cellular identity and the regulation of cellular plasticity during tissue repair. In fact, epigenetic modulation is associated with the processes of cellular de-differentiation, proliferation, and re-differentiation that takes place during tissue regeneration. In here we explore the epigenetic events that coordinate tissue repair in lower vertebrates with high regenerative capacity, and in mammalian adult stem cells, which are responsible for the homeostasis maintenance of most of our tissues. Finally we summarize promising CRISPR-based editing technologies developed during the last years, which look as promising tools to not only study but also promote specific events during tissue regeneration.
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Affiliation(s)
- Paloma Martinez-Redondo
- Gene Expression Laboratory, The Salk Institute for Biological Studies, 10010 North Torrey Pines Road, La Jolla, CA, 92037, United States
| | - Juan Carlos Izpisua Belmonte
- Gene Expression Laboratory, The Salk Institute for Biological Studies, 10010 North Torrey Pines Road, La Jolla, CA, 92037, United States.
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12
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Chen F, Fu Q, Pu L, Zhang P, Huang Y, Hou Z, Xu Z, Chen D, Huang F, Deng T, Liang X, Lu Y, Zhang M. Integrated Analysis of Quantitative Proteome and Transcriptional Profiles Reveals the Dynamic Function of Maternally Expressed Proteins After Parthenogenetic Activation of Buffalo Oocyte. Mol Cell Proteomics 2018; 17:1875-1891. [PMID: 30002204 PMCID: PMC6166679 DOI: 10.1074/mcp.ra118.000556] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Revised: 05/16/2018] [Indexed: 01/09/2023] Open
Abstract
Maternal-effect genes are especially critical for early embryonic development after fertilization and until massive activation of the embryonic genome occurs. By applying a tandem mass tag (TMT)-labeled quantitative proteomics combined with RNA sequencing approach, the proteome of the buffalo was quantitatively analyzed during parthenogenesis of mature oocytes and the two-cell stage embryo. Of 1908 quantified proteins, 123 differed significantly. The transcriptome was analyzed eight stages (GV, MII, 2-cell, 4-cell, 8-cell, 16-cell, morula, blastocyst) of Buffalo using the RNA sequencing approach, and a total of 3567 unique genes were identified to be differently expressed between all consecutive stages of pre-implantation development. Validation of proteomics results (TUBB3, CTNNA1, CDH3, MAP2K1), which are involved in tight junction and gap junction, revealing that the maternal expression of the proteins possibly plays a role in the formation of cellular junctions firstly after parthenogenetic activation. Correlation and hierarchical analyses of transcriptional profiles and the expression of NPM2 and NLRP5 mRNA of buffalo in vitro developed oocytes and parthenogenetic embryos indicated that the "maternal-to-zygotic transition" (MZT) process might exist in the model of parthenogenesis, which is similar to a normally fertilized embryo, and may occur between the 8-cell to 16-cell stage. These data provide a rich resource for further studies on maternal proteins and genes and are conducive to improving nuclear transfer technology.
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Affiliation(s)
- Fumei Chen
- From the ‡State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresource, Animal Reproduction Institute, Guangxi University, Nanning, Guangxi 530004, China
| | - Qiang Fu
- From the ‡State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresource, Animal Reproduction Institute, Guangxi University, Nanning, Guangxi 530004, China
| | - Liping Pu
- From the ‡State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresource, Animal Reproduction Institute, Guangxi University, Nanning, Guangxi 530004, China
| | - Pengfei Zhang
- From the ‡State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresource, Animal Reproduction Institute, Guangxi University, Nanning, Guangxi 530004, China
| | - Yulin Huang
- From the ‡State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresource, Animal Reproduction Institute, Guangxi University, Nanning, Guangxi 530004, China
| | - Zhen Hou
- From the ‡State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresource, Animal Reproduction Institute, Guangxi University, Nanning, Guangxi 530004, China
| | - Zhuangzhuang Xu
- From the ‡State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresource, Animal Reproduction Institute, Guangxi University, Nanning, Guangxi 530004, China
| | - Dongrong Chen
- From the ‡State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresource, Animal Reproduction Institute, Guangxi University, Nanning, Guangxi 530004, China
| | - Fengling Huang
- From the ‡State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresource, Animal Reproduction Institute, Guangxi University, Nanning, Guangxi 530004, China
| | - Tingxian Deng
- §Key Laboratory of Buffalo Genetics, Breeding and Reproduction Technology, Ministry of Agriculture and Buffalo Research Institute, Chinese Academy of Agricultural Science, Nanning, Guangxi 530001, China
| | - Xianwei Liang
- §Key Laboratory of Buffalo Genetics, Breeding and Reproduction Technology, Ministry of Agriculture and Buffalo Research Institute, Chinese Academy of Agricultural Science, Nanning, Guangxi 530001, China
| | - Yangqing Lu
- From the ‡State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresource, Animal Reproduction Institute, Guangxi University, Nanning, Guangxi 530004, China;
| | - Ming Zhang
- From the ‡State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresource, Animal Reproduction Institute, Guangxi University, Nanning, Guangxi 530004, China;
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13
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Abstract
Epigenetic mechanisms allow the establishment and maintenance of multiple cellular phenotypes from a single genomic code. At the initiation of development, the oocyte and spermatozoa provide their fully differentiated chromatin that soon after fertilization undergo extensive remodeling, resulting in a totipotent state that can then drive cellular differentiation towards all cell types. These remodeling involves different epigenetic modifications, including DNA methylation, post-translational modifications of histones, non-coding RNAs, and large-scale chromatin conformation changes. Moreover, epigenetic remodeling is responsible for reprogramming somatic cells to totipotency upon somatic cell nuclear transfer/cloning, which is often incomplete and inefficient. Given that environmental factors, such as assisted reproductive techniques (ARTs), can affect epigenetic remodeling, there is interest in understanding the mechanisms driving these changes. We describe and discuss our current understanding of mechanisms responsible for the epigenetic remodeling that ensues during preimplantation development of mammals, presenting findings from studies of mouse embryos and when available comparing them to what is known for human and cattle embryos.
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Affiliation(s)
- Pablo J Ross
- Department of Animal Science, University of California Davis, Davis, CA, United States
| | - Rafael V Sampaio
- Department of Animal Science, University of California Davis, Davis, CA, United States.,Department of Animal Science, University of California Davis, Davis, CA, United States
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14
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Ruan Z, Zhao X, Li Z, Qin X, Shao Q, Ruan Q, Deng Y, Jiang J, Huang B, Lu F, Shi D. Effect of sex differences in donor foetal fibroblast on the early development and DNA methylation status of buffalo (Bubalus bubalis) nuclear transfer embryos. Reprod Domest Anim 2018; 54:11-22. [PMID: 30051521 DOI: 10.1111/rda.13286] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Accepted: 07/08/2018] [Indexed: 11/27/2022]
Abstract
Low efficiency of somatic cell nuclear transfer (SCNT) embryos is largely attributable to imperfect reprogramming of the donor nucleus. The differences in epigenetic reprogramming between female and male buffalo cloned embryos remain unclear. We explored the effects of donor cell sex differences on the development of SCNT embryos. We and then compared the expression of DNA methylation (5-methylcytosine-5mC and 5-hydroxymethylcytosine-5hmC) and the expression level of relevant genes, and histone methylation (H3K9me2 and H3K9me3) level in SCNT-♀ and SCNT-♂ preimplantation embryos with in vitro fertilization (IVF) counterparts. In the study, we showed that developmental potential of SCNT-♀ embryos was greater than that of SCNT-♂ embryos (p < 0.05). 5mC was mainly expressed in SCNT-♀ embryos, whereas 5hmC was majorly expressed in SCNT-♂ embryos (p < 0.05). The levels of DNA methylation (5mC and 5hmC), Dnmt3b, TET1 and TET3 in the SCNT-♂ embryos were higher than those of SCNT-♀ embryos (p < 0.05). In addition, there were no significant differences in the expression of H3K9me2 at eight-stage of the IVF, SCNT-♀ and SCNT-♂embryos (p < 0.05). However, H3K9me3 was upregulated in SCNT-♂ embryos at the eight-cell stage (p < 0.05). Thus, KDM4B ectopic expression decreased the level of H3K9me3 and significantly improved the developmental rate of two-cell, eight-cell and blastocysts of SCNT-♂ embryos (p < 0.05). Overall, the lower levels of DNA methylation (5mC and 5hmC) and H3K9me3 may introduce the greater developmental potential in buffalo SCNT-♀ embryos than that of SCNT-♂ embryos.
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Affiliation(s)
- Ziyun Ruan
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, Guangxi, China.,School of Basic Medicine, Guangxi University of Chinese Medicine, Nanning, Guangxi, China
| | - Xin Zhao
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, Guangxi, China
| | - Zhengda Li
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, Guangxi, China
| | - Xiling Qin
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, Guangxi, China
| | - Qiming Shao
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, Guangxi, China
| | - Qiuyan Ruan
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, Guangxi, China
| | - Yanfei Deng
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, Guangxi, China
| | - Jianrong Jiang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, Guangxi, China
| | - Ben Huang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, Guangxi, China.,Guangxi High Education Laboratory for Animal Reproduction and Biotechnology, Guangxi University, Nanning, Guangxi, China
| | - Fenghua Lu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, Guangxi, China.,Guangxi High Education Laboratory for Animal Reproduction and Biotechnology, Guangxi University, Nanning, Guangxi, China
| | - Deshun Shi
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, Guangxi, China.,Guangxi High Education Laboratory for Animal Reproduction and Biotechnology, Guangxi University, Nanning, Guangxi, China
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15
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Song X, Liu Z, He H, Wang J, Li H, Li J, Li F, Jiang Z, Huan Y. Dnmt1s in donor cells is a barrier to SCNT-mediated DNA methylation reprogramming in pigs. Oncotarget 2018; 8:34980-34991. [PMID: 28380421 PMCID: PMC5471028 DOI: 10.18632/oncotarget.16507] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Accepted: 03/09/2017] [Indexed: 01/27/2023] Open
Abstract
Low development of somatic cell nuclear transfer embryos could be due to the incomplete DNA methylation reprogramming, and Dnmt1s existing in donor cells may be one cause of this disrupted DNA methylation reprogramming. However, the reprogramming pattern of Dnmt1s and its effect on DNA methylation reprogramming in cloned embryos remain poorly understood. Here, we displayed that along with the significantly higher Dnmt1 expression at the zygotic gene activation stage of cloned embryos, genomic methylation level was markedly upregulated, and the arrested rate was significantly higher compared with their in vitro fertilization counterparts. Then, we demonstrated that Dnmt1s, not Dnmt1o, methylation and expression levels in cloned embryos were significantly higher from the 1-cell to 4-cell stage but markedly lower at the blastocyst stage. When Dnmt1s in donor cells was appropriately removed, more cloned embryos passed through the zygotic gene activation stage and the blastocyst rate significantly increased. Furthermore, Dnmt1s knockdown significantly improved itself and genomic methylation reconstruction in cloned embryos. Finally, we found that Dnmt1s removal significantly promoted the demethylation and expression of pluripotent genes in cloned embryos. Taken together, these data suggest that Dnmt1s in donor cells is a critical barrier to somatic cell nuclear transfer mediated DNA methylation reprogramming, impairing the development of cloned embryos.
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Affiliation(s)
- Xuexiong Song
- College of Animal Science and Technology, Qingdao Agricultural University, Qingdao, Shandong Province, China
| | - Zhonghua Liu
- College of Life Science, Northeast Agricultural University, Harbin, Heilongjiang Province, China
| | - Hongbin He
- College of Life Science, Shandong Normal University, Jinan, Shandong Province, China
| | - Jianyu Wang
- Institute of Life Science, Chongqing Medical University, Chongqing, China
| | - Huatao Li
- College of Animal Science and Technology, Qingdao Agricultural University, Qingdao, Shandong Province, China
| | - Jingyu Li
- College of Life Science, Northeast Agricultural University, Harbin, Heilongjiang Province, China
| | - Fangzheng Li
- College of Animal Science and Technology, Qingdao Agricultural University, Qingdao, Shandong Province, China
| | - Zhongling Jiang
- College of Animal Science and Technology, Qingdao Agricultural University, Qingdao, Shandong Province, China
| | - Yanjun Huan
- College of Animal Science and Technology, Qingdao Agricultural University, Qingdao, Shandong Province, China
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16
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Barrera AD, García EV, Hamdi M, Sánchez-Calabuig MJ, López-Cardona ÁP, Balvís NF, Rizos D, Gutiérrez-Adán A. Embryo culture in presence of oviductal fluid induces DNA methylation changes in bovine blastocysts. Reproduction 2017; 154:1-12. [DOI: 10.1530/rep-16-0651] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Revised: 04/03/2017] [Accepted: 04/13/2017] [Indexed: 12/19/2022]
Abstract
During the transit through the oviduct, the early embryo initiates an extensive DNA methylation reprogramming of its genome. Given that these epigenetic modifications are susceptible to environmental factors, components present in the oviductal milieu could affect the DNA methylation marks of the developing embryo. The aim of this study was to examine if culture of bovine embryos with oviductal fluid (OF) can induce DNA methylation changes at specific genomic regions in the resulting blastocysts. In vitro produced zygotes were cultured in medium with 3 mg/mL bovine serum albumin (BSA) or 1.25% OF added at the one- to 16-cell stage (OF1–16), one- to 8-cell stage (OF1–8) or 8- to 16-cell stage (OF8–16), and then were cultured until Day 8 in medium with 3 mg/mL BSA. Genomic regions in four developmentally important genes (MTERF2, ABCA7, OLFM1, GMDS) and within LINE-1 retrotransposons were selected for methylation analysis by bisulfite sequencing on Day 7–8 blastocysts. Blastocysts derived from OF1–16 group showed lower CpG methylation levels in MTERF2 and ABCA7 compared with the BSA group. However, CpG sites within MTERF2, ABCA7 and OLFM1 showed higher methylation levels in groups OF1–8 and OF8–16 than in OF1–16. For LINE-1 elements, higher CpG methylation levels were observed in blastocysts from the OF1–16 group than in the other experimental groups. In correlation with the methylation changes observed, mRNA expression level of MTERF2 was increased, while LINE-1 showed a decreased expression in blastocysts from OF1–16 group. Our results suggest that embryos show transient sensitivity to OF at early stages, which is reflected by specific methylation changes at the blastocyst stage.
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17
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Ji Y, Wu Z, Dai Z, Wang X, Li J, Wang B, Wu G. Fetal and neonatal programming of postnatal growth and feed efficiency in swine. J Anim Sci Biotechnol 2017; 8:42. [PMID: 28484595 PMCID: PMC5420136 DOI: 10.1186/s40104-017-0173-5] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Accepted: 04/18/2017] [Indexed: 01/10/2023] Open
Abstract
Maternal undernutrition or overnutrition during pregnancy alters organ structure, impairs prenatal and neonatal growth and development, and reduces feed efficiency for lean tissue gains in pigs. These adverse effects may be carried over to the next generation or beyond. This phenomenon of the transgenerational impacts is known as fetal programming, which is mediated by stable and heritable alterations of gene expression through covalent modifications of DNA and histones without changes in DNA sequences (namely, epigenetics). The mechanisms responsible for the epigenetic regulation of protein expression and functions include chromatin remodeling; DNA methylation (occurring at the 5´-position of cytosine residues within CpG dinucleotides); and histone modifications (acetylation, methylation, phosphorylation, and ubiquitination). Like maternal malnutrition, undernutrition during the neonatal period also reduces growth performance and feed efficiency (weight gain:feed intake; also known as weight-gain efficiency) in postweaning pigs by 5-10%, thereby increasing the days necessary to reach the market body-weight. Supplementing functional amino acids (e.g., arginine and glutamine) and vitamins (e.g., folate) play a key role in activating the mammalian target of rapamycin signaling and regulating the provision of methyl donors for DNA and protein methylation. Therefore, these nutrients are beneficial for the dietary treatment of metabolic disorders in offspring with intrauterine growth restriction or neonatal malnutrition. The mechanism-based strategies hold great promise for the improvement of the efficiency of pork production and the sustainability of the global swine industry.
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Affiliation(s)
- Yun Ji
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, 100193 China
| | - Zhenlong Wu
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, 100193 China
| | - Zhaolai Dai
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, 100193 China
| | - Xiaolong Wang
- Henan Yinfa Animal Husbandry Co., Ltd., Xinzheng, Henan 451100 China
| | - Ju Li
- Henan Yinfa Animal Husbandry Co., Ltd., Xinzheng, Henan 451100 China
| | - Binggen Wang
- Henan Yinfa Animal Husbandry Co., Ltd., Xinzheng, Henan 451100 China
| | - Guoyao Wu
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, 100193 China.,Department of Animal Science and Center for Animal Genomics, Texas A&M University, Room 212, College Station, TX 77843 USA
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18
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Anckaert E, Fair T. DNA methylation reprogramming during oogenesis and interference by reproductive technologies: Studies in mouse and bovine models. Reprod Fertil Dev 2017; 27:739-54. [PMID: 25976160 DOI: 10.1071/rd14333] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Accepted: 04/01/2015] [Indexed: 12/24/2022] Open
Abstract
The use of assisted reproductive technology (ART) to overcome fertility problems has continued to increase since the birth of the first baby conceived by ART over 30 years ago. Similarly, embryo transfer is widely used as a mechanism to advance genetic gain in livestock. Despite repeated optimisation of ART treatments, pre- and postnatal outcomes remain compromised. Epigenetic mechanisms play a fundamental role in successful gametogenesis and development. The best studied of these is DNA methylation; the appropriate establishment of DNA methylation patterns in gametes and early embryos is essential for healthy development. Superovulation studies in the mouse indicate that specific ARTs are associated with normal imprinting establishment in oocytes, but abnormal imprinting maintenance in embryos. A similar limited impact of ART on oocytes has been reported in cattle, whereas the majority of embryo-focused studies have used cloned embryos, which do exhibit aberrant DNA methylation. The present review discusses the impact of ART on oocyte and embryo DNA methylation with regard to data available from mouse and bovine models.
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Affiliation(s)
- Ellen Anckaert
- Follicle Biology Laboratory and Center for Reproductive Medicine, UZ Brussel, Vrije Universiteit Brussel, Laarbeeklaan 101, Brussels 1090, Belgium
| | - Trudee Fair
- School of Agriculture and Food Sciences, University College Dublin, Belfield, Dublin 4, Ireland
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19
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Zhang K, Smith GW. Maternal control of early embryogenesis in mammals. Reprod Fertil Dev 2017; 27:880-96. [PMID: 25695370 DOI: 10.1071/rd14441] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2014] [Accepted: 01/10/2015] [Indexed: 12/11/2022] Open
Abstract
Oocyte quality is a critical factor limiting the efficiency of assisted reproductive technologies (ART) and pregnancy success in farm animals and humans. ART success is diminished with increased maternal age, suggesting a close link between poor oocyte quality and ovarian aging. However, the regulation of oocyte quality remains poorly understood. Oocyte quality is functionally linked to ART success because the maternal-to-embryonic transition (MET) is dependent on stored maternal factors, which are accumulated in oocytes during oocyte development and growth. The MET consists of critical developmental processes, including maternal RNA depletion and embryonic genome activation. In recent years, key maternal proteins encoded by maternal-effect genes have been determined, primarily using genetically modified mouse models. These proteins are implicated in various aspects of early embryonic development, including maternal mRNA degradation, epigenetic reprogramming, signal transduction, protein translation and initiation of embryonic genome activation. Species differences exist in the number of cell divisions encompassing the MET and maternal-effect genes controlling this developmental window. Perturbations of maternal control, some of which are associated with ovarian aging, result in decreased oocyte quality.
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Affiliation(s)
- Kun Zhang
- Laboratory of Mammalian Reproductive Biology and Genomics, Michigan State University, East Lansing, MI 48824, USA
| | - George W Smith
- Laboratory of Mammalian Reproductive Biology and Genomics, Michigan State University, East Lansing, MI 48824, USA
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20
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Satellite DNA methylation status and expression of selected genes in Bos indicus blastocysts produced in vivo and in vitro. ZYGOTE 2017; 25:131-140. [PMID: 28137339 DOI: 10.1017/s096719941600040x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Bovine embryos produced in vivo and in vitro differ with respect to molecular profiles, including epigenetic marks and gene expression profiles. This study investigated the CpG methylation status in bovine testis satellite I (BTS) and Bos taurus alpha satellite I (BTαS) DNA sequences, and concomitantly the relative abundance of transcripts, critically involved in DNA methylation (DNMT1 and DNMT3A), growth and development (IGF2R) and pluripotency (POU5F1) in Bos indicus embryos produced in vitro or in vivo. Results revealed that methylation of BTS were higher (P < 0.05) in embryos produced in vitro compared with their in vivo produced counterparts, while the methylation status of BTαS was similar in both groups. There were no significant differences in transcript abundance for DNMT3A, IGF2R and POU5F1 between blastocysts produced in vivo and in vitro. However, a significantly lower amount of DNMT1 transcripts was found in the in vitro cultured embryos (P < 0.05) compared with their in vivo derived counterparts. In conclusion, this study reported only minor changes in the expression of developmentally important genes and satellite DNA methylation related to the in vitro embryo production system.
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21
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Desmet KLJ, Van Hoeck V, Gagné D, Fournier E, Thakur A, O'Doherty AM, Walsh CP, Sirard MA, Bols PEJ, Leroy JLMR. Exposure of bovine oocytes and embryos to elevated non-esterified fatty acid concentrations: integration of epigenetic and transcriptomic signatures in resultant blastocysts. BMC Genomics 2016; 17:1004. [PMID: 27931182 PMCID: PMC5146907 DOI: 10.1186/s12864-016-3366-y] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Accepted: 12/02/2016] [Indexed: 12/30/2022] Open
Abstract
Background Metabolic stress associated with negative energy balance in high producing dairy cattle and obesity in women is a risk factor for decreased fertility. Non-esterified fatty acids (NEFA) are involved in this pathogenesis as they jeopardize oocyte and embryo development. Growing evidence indicates that maternal metabolic disorders can disturb epigenetic programming, such as DNA methylation, in the offspring. Oocyte maturation and early embryo development coincide with methylation changes and both are sensitive to adverse environments. Therefore, we investigated whether elevated NEFA concentrations affect establishment and maintenance of DNA methylation in oocytes and embryos, subsequently altering transcriptomic profiles and developmental competence of resultant blastocysts. Results Bovine oocytes and embryos were exposed to different NEFA concentrations in separate experiments. In the first experiment, oocytes were matured in vitro for 24 h in medium containing: 1) physiological (“BASAL”) concentrations of oleic (OA), palmitic (PA) and stearic (SA) acid or 2) pathophysiological (“HIGH COMBI”) concentrations of OA, PA and SA. In the second experiment, zygotes were cultivated in vitro for 6.5 days under BASAL or HIGH COMBI conditions. Developmental competence was evaluated by assessing cleavage and blastocyst rate. Overall gene expression and DNA methylation of resultant blastocysts were analyzed using microarray. DNA methylation data were re-evaluated by pyrosequencing. HIGH COMBI-exposed oocytes and embryos displayed a lower competence to develop into blastocysts compared to BASAL-exposed counterparts (19.3% compared to 23.2% and 18.2% compared to 25.3%, respectively) (P < 0.05). HIGH COMBI-exposed oocytes and embryos resulted in blastocysts with altered DNA methylation and transcriptomic fingerprints, compared to BASAL-exposed counterparts. Differences in gene expression and methylation were more pronounced after exposure during culture compared to maturation suggesting that zygotes are more susceptible to adverse environments. Main gene networks affected were related to lipid and carbohydrate metabolism, cell death, immune response and metabolic disorders. Conclusions Overall, high variation in methylation between blastocysts made it difficult to draw conclusions concerning methylation of individual genes, although a clear overview of affected pathways was obtained. This may offer clues regarding the high rate of embryonic loss and metabolic diseases during later life observed in offspring from mothers displaying lipolytic disorders.
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Affiliation(s)
- K L J Desmet
- Laboratory of Veterinary Physiology and Biochemistry, Department of Veterinary Sciences, Faculty of Pharmaceutical, Biomedical and Veterinary Sciences, University of Antwerp, Wilrijk, Belgium.
| | - V Van Hoeck
- Laboratory of Veterinary Physiology and Biochemistry, Department of Veterinary Sciences, Faculty of Pharmaceutical, Biomedical and Veterinary Sciences, University of Antwerp, Wilrijk, Belgium
| | - D Gagné
- Centre de Recherche en Biologie de la Reproduction (CRBR), Département des Sciences Animales, Université Laval, Québec, Canada
| | - E Fournier
- Centre de Recherche en Biologie de la Reproduction (CRBR), Département des Sciences Animales, Université Laval, Québec, Canada
| | - A Thakur
- British Columbia Cancer Agency, University of British Columbia, Vancouver, Canada
| | - A M O'Doherty
- School of Agriculture and Food Science, University College Dublin, Dublin, Ireland
| | - C P Walsh
- Centre for Molecular Biosciences, School of Biomedical Sciences, University of Ulster, Coleraine, UK
| | - M A Sirard
- Centre de Recherche en Biologie de la Reproduction (CRBR), Département des Sciences Animales, Université Laval, Québec, Canada
| | - P E J Bols
- Laboratory of Veterinary Physiology and Biochemistry, Department of Veterinary Sciences, Faculty of Pharmaceutical, Biomedical and Veterinary Sciences, University of Antwerp, Wilrijk, Belgium
| | - J L M R Leroy
- Laboratory of Veterinary Physiology and Biochemistry, Department of Veterinary Sciences, Faculty of Pharmaceutical, Biomedical and Veterinary Sciences, University of Antwerp, Wilrijk, Belgium
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22
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Zou C, Fu Y, Li C, Liu H, Li G, Li J, Zhang H, Wu Y, Li C. Genome-wide gene expression and DNA methylation differences in abnormally cloned and normally natural mating piglets. Anim Genet 2016; 47:436-50. [DOI: 10.1111/age.12436] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/18/2016] [Indexed: 01/24/2023]
Affiliation(s)
- C. Zou
- Key Lab of Agriculture Animal Genetics, Breeding, and Reproduction of Ministry of Education; College of Animal Science and Technology; Huazhong Agricultural University; Wuhan 430070 People's Republic of China
| | - Y. Fu
- Key Lab of Agriculture Animal Genetics, Breeding, and Reproduction of Ministry of Education; College of Animal Science and Technology; Huazhong Agricultural University; Wuhan 430070 People's Republic of China
| | - C. Li
- Key Lab of Agriculture Animal Genetics, Breeding, and Reproduction of Ministry of Education; College of Animal Science and Technology; Huazhong Agricultural University; Wuhan 430070 People's Republic of China
| | - H. Liu
- Key Lab of Agriculture Animal Genetics, Breeding, and Reproduction of Ministry of Education; College of Animal Science and Technology; Huazhong Agricultural University; Wuhan 430070 People's Republic of China
| | - G. Li
- Key Lab of Agriculture Animal Genetics, Breeding, and Reproduction of Ministry of Education; College of Animal Science and Technology; Huazhong Agricultural University; Wuhan 430070 People's Republic of China
| | - J. Li
- Key Lab of Agriculture Animal Genetics, Breeding, and Reproduction of Ministry of Education; College of Animal Science and Technology; Huazhong Agricultural University; Wuhan 430070 People's Republic of China
| | - H. Zhang
- Key Lab of Agriculture Animal Genetics, Breeding, and Reproduction of Ministry of Education; College of Animal Science and Technology; Huazhong Agricultural University; Wuhan 430070 People's Republic of China
| | - Y. Wu
- Key Lab of Agriculture Animal Genetics, Breeding, and Reproduction of Ministry of Education; College of Animal Science and Technology; Huazhong Agricultural University; Wuhan 430070 People's Republic of China
| | - C. Li
- Key Lab of Agriculture Animal Genetics, Breeding, and Reproduction of Ministry of Education; College of Animal Science and Technology; Huazhong Agricultural University; Wuhan 430070 People's Republic of China
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23
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Buemo CP, Gambini A, Moro LN, Hiriart MI, Fernández-Martín R, Collas P, Salamone DF. Embryo Aggregation in Pig Improves Cloning Efficiency and Embryo Quality. PLoS One 2016; 11:e0146390. [PMID: 26894831 PMCID: PMC4760708 DOI: 10.1371/journal.pone.0146390] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2015] [Accepted: 12/16/2015] [Indexed: 11/19/2022] Open
Abstract
In this study, we analyzed the effects of the cloned embryo aggregation on in vitro embryo development and embryo quality by measuring blastocyst diameter and cell number, DNA fragmentation levels and the expression of genes associated with pluripotency, apoptosis, trophoblast and DNA methylation in the porcine. Zona-free reconstructed cloned embryos were cultured in the well of the well system, placing one (1x non aggregated group) or three (3x group) embryos per microwell. Our results showed that aggregation of three embryos increased blastocyst formation rate and blastocyst diameter of cloned pig embryos. DNA fragmentation levels in 3x aggregated cloned blastocysts were significantly decreased compared to 1x blastocysts. Levels of Oct4, Klf4, Igf2, Bax and Dnmt 1 transcripts were significantly higher in aggregated embryos, whereas Nanog levels were not affected. Transcripts of Cdx2 and Bcl-xl were essentially non-detectable. Our study suggests that embryo aggregation in the porcine may be beneficial for cloned embryo development and embryo quality, through a reduction in apoptotic levels and an improvement in cell reprogramming.
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Affiliation(s)
- Carla Paola Buemo
- Laboratory of Animal Biotechnology, Faculty of Agriculture, University of Buenos Aires, Buenos Aires, Argentina
- National Institute of Scientific and Technological Research, Buenos Aires, Argentina
| | - Andrés Gambini
- Laboratory of Animal Biotechnology, Faculty of Agriculture, University of Buenos Aires, Buenos Aires, Argentina
- National Institute of Scientific and Technological Research, Buenos Aires, Argentina
| | - Lucia Natalia Moro
- Laboratory of Animal Biotechnology, Faculty of Agriculture, University of Buenos Aires, Buenos Aires, Argentina
- National Institute of Scientific and Technological Research, Buenos Aires, Argentina
| | - María Inés Hiriart
- Laboratory of Animal Biotechnology, Faculty of Agriculture, University of Buenos Aires, Buenos Aires, Argentina
- National Institute of Scientific and Technological Research, Buenos Aires, Argentina
| | - Rafael Fernández-Martín
- Laboratory of Animal Biotechnology, Faculty of Agriculture, University of Buenos Aires, Buenos Aires, Argentina
- National Institute of Scientific and Technological Research, Buenos Aires, Argentina
| | - Philippe Collas
- Department of Molecular Medicine, Institute of Basic Medical Sciences, Faculty of Medicine, University of Oslo, and Norwegian Center for Stem Cell Research, Oslo, Norway
| | - Daniel Felipe Salamone
- Laboratory of Animal Biotechnology, Faculty of Agriculture, University of Buenos Aires, Buenos Aires, Argentina
- National Institute of Scientific and Technological Research, Buenos Aires, Argentina
- * E-mail:
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24
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Differential developmental competence and gene expression patterns in buffalo (Bubalus bubalis) nuclear transfer embryos reconstructed with fetal fibroblasts and amnion mesenchymal stem cells. Cytotechnology 2015; 68:1827-48. [PMID: 26660476 DOI: 10.1007/s10616-015-9936-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Accepted: 12/01/2015] [Indexed: 01/01/2023] Open
Abstract
The developmental ability and gene expression pattern at 8- to 16-cell and blastocyst stages of buffalo (Bubalus bubalis) nuclear transfer (NT) embryos from fetal fibroblasts (FFs), amnion mesenchymal stem cells (AMSCs) and in vitro fertilized (IVF) embryos were compared in the present studies. The in vitro expanded buffalo FFs showed a typical "S" shape growth curve with a doubling time of 41.4 h and stained positive for vimentin. The in vitro cultured undifferentiated AMSCs showed a doubling time of 39.5 h and stained positive for alkaline phosphatase, and these cells also showed expression of pluripotency markers (OCT 4, SOX 2, NANOG), and mesenchymal stem cell markers (CD29, CD44) and were negative for haematopoietic marker (CD34) genes at different passages. Further, when AMSCs were exposed to corresponding induction conditions, these cells differentiated into adipogenic, chondrogenic and osteogenic lineages which were confirmed through oil red O, alcian blue and alizarin staining, respectively. Donor cells at 3-4 passage were employed for NT. The cleavage rate was significantly (P < 0.05) higher in IVF than in FF-NT and AMSC-NT embryos (82.6 ± 8.2 vs. 64.6 ± 1.3 and 72.3 ± 2.2 %, respectively). However, blastocyst rates in IVF and AMSC-NT embryos (30.6 ± 2.7 and 28.9 ± 3.1 %) did not differ and were significantly (P < 0.05) higher than FF-NT (19.5 ± 1.8 %). Total cell number did not show significant (P > 0.05) differences between IVF and AMSC-NT embryos (186.7 ± 4.2, 171.2 ± 3.8, respectively) but were significantly (P < 0.05) higher than that from FF-NT (151.3 ± 4.1). Alterations in the expression pattern of genes implicated in transcription and pluripotency (OCT4, STAT3, NANOG), DNA methylation (DNMT1, DNMT3A), histone deacetylation (HDAC2), growth factor signaling and imprinting (IGF2, IGF2R), apoptosis (BAX, BCL2), metabolism (GLUT1) and oxidative stress (MnSOD) regulation were observed in cloned embryos. The transcripts or expression patterns in AMSC-NT embryos more closely followed that of the in vitro derived embryos compared with FF-NT embryos. The results demonstrate that multipotent amnion MSCs have a greater potential as donor cells than FFs in achieving enhanced production of cloned buffalo embryos.
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Effect of DNMT inhibitor on bovine parthenogenetic embryo development. Biochem Biophys Res Commun 2015; 466:505-11. [DOI: 10.1016/j.bbrc.2015.09.060] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Accepted: 09/10/2015] [Indexed: 11/20/2022]
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Wan Y, Deng M, Zhang G, Ren C, Zhang H, Zhang Y, Wang L, Wang F. Abnormal expression of DNA methyltransferases and genomic imprinting in cloned goat fibroblasts. Cell Biol Int 2015; 40:74-82. [DOI: 10.1002/cbin.10540] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2015] [Revised: 08/16/2015] [Accepted: 08/22/2015] [Indexed: 01/03/2023]
Affiliation(s)
- Yongjie Wan
- Jiangsu Livestock Embryo Engineering Laboratory; College of Animal Science and Technology; Nanjing Agricultural University; Nanjing 210095 China
| | - Mingtian Deng
- Jiangsu Livestock Embryo Engineering Laboratory; College of Animal Science and Technology; Nanjing Agricultural University; Nanjing 210095 China
| | - Guomin Zhang
- Jiangsu Livestock Embryo Engineering Laboratory; College of Animal Science and Technology; Nanjing Agricultural University; Nanjing 210095 China
| | - Caifang Ren
- Jiangsu Livestock Embryo Engineering Laboratory; College of Animal Science and Technology; Nanjing Agricultural University; Nanjing 210095 China
| | - Hao Zhang
- Jiangsu Livestock Embryo Engineering Laboratory; College of Animal Science and Technology; Nanjing Agricultural University; Nanjing 210095 China
| | - Yanli Zhang
- Jiangsu Livestock Embryo Engineering Laboratory; College of Animal Science and Technology; Nanjing Agricultural University; Nanjing 210095 China
| | - Lizhong Wang
- Jiangsu Livestock Embryo Engineering Laboratory; College of Animal Science and Technology; Nanjing Agricultural University; Nanjing 210095 China
| | - Feng Wang
- Jiangsu Livestock Embryo Engineering Laboratory; College of Animal Science and Technology; Nanjing Agricultural University; Nanjing 210095 China
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Mohapatra SK, Sandhu A, Neerukattu VS, Singh KP, Selokar NL, Singla SK, Chauhan MS, Manik RS, Palta P. Buffalo embryos produced by handmade cloning from oocytes selected using brilliant cresyl blue staining have better developmental competence and quality and are closer to embryos produced by in vitro fertilization in terms of their epigenetic status and gene expression pattern. Cell Reprogram 2015; 17:141-50. [PMID: 25826727 DOI: 10.1089/cell.2014.0077] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
We compared handmade cloned (HMC) buffalo blastocysts produced from oocytes stained with Brilliant Cresyl Blue (BCB) and classified into those with blue (BCB+) or colorless cytoplasm (BCB-). The blastocyst rate was higher (p<0.001) for BCB+ than for BCB- oocytes (43.41 ± 2.54 vs. 22.74 ± 1.76%). BCB+ blastocysts had inner cell mass (ICM) cell number, ICM-to-trophectoderm ratio, global level of H3K18ac, apoptotic index, and expression level of BCL-XL, but not that of CASPASE-3, similar to that of blastocysts produced through in vitro fertilization (IVF), which was higher (p<0.05) than that of BCB- blastocysts. The global level of H3K9me2, which was similar in BCB+ and BCB- blastocysts, was higher (p<0.01) than that in IVF blastocysts. The expression level of OCT4 and SOX2 was higher (p<0.05) and that of GATA2 was lower (p<0.05) in BCB+ than that in BCB- blastocysts, whereas that of DNMT1, DNMT3a, NANOG, and CDX2 was not significantly different between the two groups. The expression level of DNMT1, OCT4, NANOG, and SOX2 was lower (p<0.05) and that of CDX2 was higher (p<0.05) in BCB+ than in IVF blastocysts. In conclusion, because BCB+ blastocysts have better developmental competence and are closer to IVF blastocysts in terms of quality, epigenetic status, and gene expression than BCB- blastocysts, BCB staining can be used effectively for selection of developmentally competent oocytes for HMC.
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Affiliation(s)
- Sushil K Mohapatra
- Embryo Biotechnology Lab, Animal Biotechnology Centre, National Dairy Research Institute , Karnal-132001, Haryana, India
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Golding MC, Snyder M, Williamson GL, Veazey KJ, Peoples M, Pryor JH, Westhusin ME, Long CR. Histone-lysine N-methyltransferase SETDB1 is required for development of the bovine blastocyst. Theriogenology 2015; 84:1411-22. [PMID: 26279314 DOI: 10.1016/j.theriogenology.2015.07.028] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Revised: 07/20/2015] [Accepted: 07/21/2015] [Indexed: 01/10/2023]
Abstract
Transcripts derived from select clades of transposable elements are among the first to appear in early mouse and human embryos, indicating transposable elements and the mechanisms that regulate their activity are fundamental to the establishment of the founding mammalian lineages. However, the mechanisms by which these parasitic sequences are involved in directing the developmental program are still poorly characterized. Transposable elements are regulated through epigenetic means, where combinatorial patterns of DNA methylation and histone 3 lysine 9 trimethylation (H3K9me3) suppress their transcription. From studies in rodents, SET domain bifurcated 1 (SETDB1) has emerged as the core methyltransferase responsible for marking transposable elements with H3K9me3 and temporally regulating their transcriptional activity. SETDB1 loss of function studies in mice reveal that although extraembryonic tissues do not require this methyltransferase, establishment of the embryo proper fails without it. As the bovine embryo initiates the processes of epigenetic programming earlier in the preimplantation phase, we sought to determine whether suppressing SETDB1 would block the formation of the inner cell mass. We report here that bovine SETDB1 transcripts are present throughout preimplantation development, and RNA interference-based depletion blocks embryo growth at the morula stage of development. Although we did not observe alterations in global histone methylation or transposable element transcription, we did observe increased global levels of H3K27 acetylation, an epigenetic mark associated with active enhancers. Our observations suggest that SETDB1 might interact with the epigenetic machinery controlling enhancer function and that suppression of this methyltransferase may disrupt the bovine developmental program.
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Affiliation(s)
- Michael C Golding
- Department of Veterinary Physiology and Pharmacology, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas, USA.
| | - Matthew Snyder
- Department of Veterinary Physiology and Pharmacology, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas, USA
| | - Gayle L Williamson
- Department of Veterinary Physiology and Pharmacology, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas, USA
| | - Kylee J Veazey
- Department of Veterinary Physiology and Pharmacology, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas, USA
| | - Michael Peoples
- Department of Veterinary Physiology and Pharmacology, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas, USA
| | - Jane H Pryor
- Department of Veterinary Physiology and Pharmacology, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas, USA
| | - Mark E Westhusin
- Department of Veterinary Physiology and Pharmacology, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas, USA
| | - Charles R Long
- Department of Veterinary Physiology and Pharmacology, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas, USA
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Mohapatra SK, Sandhu A, Singh KP, Singla SK, Chauhan MS, Manik R, Palta P. Establishment of Trophectoderm Cell Lines from Buffalo (Bubalus bubalis) Embryos of Different Sources and Examination of In Vitro Developmental Competence, Quality, Epigenetic Status and Gene Expression in Cloned Embryos Derived from Them. PLoS One 2015; 10:e0129235. [PMID: 26053554 PMCID: PMC4459972 DOI: 10.1371/journal.pone.0129235] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2015] [Accepted: 05/06/2015] [Indexed: 11/26/2022] Open
Abstract
Despite being successfully used to produce live offspring in many species, somatic cell nuclear transfer (NT) has had a limited applicability due to very low (>1%) live birth rate because of a high incidence of pregnancy failure, which is mainly due to placental dysfunction. Since this may be due to abnormalities in the trophectoderm (TE) cell lineage, TE cells can be a model to understand the placental growth disorders seen after NT. We isolated and characterized buffalo TE cells from blastocysts produced by in vitro fertilization (TE-IVF) and Hand-made cloning (TE-HMC), and compared their growth characteristics and gene expression, and developed a feeder-free culture system for their long-term culture. The TE-IVF cells were then used as donor cells to produce HMC embryos following which their developmental competence, quality, epigenetic status and gene expression were compared with those of HMC embryos produced using fetal or adult fibroblasts as donor cells. We found that although TE-HMC and TE-IVF cells have a similar capability to grow in culture, significant differences exist in gene expression levels between them and between IVF and HMC embryos from which they are derived, which may have a role in the placental abnormalities associated with NT pregnancies. Although TE cells can be used as donor cells for producing HMC blastocysts, their developmental competence and quality is lower than that of blastocysts produced from fetal or adult fibroblasts. The epigenetic status and expression level of many important genes is different in HMC blastocysts produced using TE cells or fetal or adult fibroblasts or those produced by IVF.
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Affiliation(s)
| | - Anjit Sandhu
- Animal Biotechnology Centre, National Dairy Research Institute, Karnal, India
| | - Karn Pratap Singh
- Animal Biotechnology Centre, National Dairy Research Institute, Karnal, India
| | - Suresh Kumar Singla
- Animal Biotechnology Centre, National Dairy Research Institute, Karnal, India
| | | | - Radheysham Manik
- Animal Biotechnology Centre, National Dairy Research Institute, Karnal, India
| | - Prabhat Palta
- Animal Biotechnology Centre, National Dairy Research Institute, Karnal, India
- * E-mail:
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Zhang H, Wang L, Li W, Mao Q, Wang Y, Li Q, Hua S, Zhang Y. A simple and efficient method to transfect small interference RNA into bovine SCNT embryos. Theriogenology 2014; 84:846-52. [PMID: 26194696 DOI: 10.1016/j.theriogenology.2014.12.021] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2014] [Revised: 12/09/2014] [Accepted: 12/15/2014] [Indexed: 01/12/2023]
Abstract
RNA interference is an important tool to study the gene function. Microinjection and electroporation are usually used to transfer DNA, small interference RNA (siRNA), morpholinos, and protein into oocytes or embryos. This study used a simple and effective method to transfect siRNA into bovine somatic cell nuclear transfer (SCNT) embryos. In this method, siRNA transfection and electrofusion of SCNT were combined. A pair of platinum microelectrodes was used during SCNT to complete electrofusion. A CY3-labeled siRNA-targeted DNA methyltransferase-1 (DNMT1) was chosen to verify the siRNA transfection efficiency of this approach. First, a suitable concentration of siRNA was mixed with Zimmermann's fusion medium. Reconstructed embryos were then added into the microdrops of the mixed fusion medium to simultaneously transfect the siRNA and electrofuse the SCNT embryos. Our results showed that transfecting DNMT1 siRNA via the proposed method caused obvious CY3 fluorescence and significant downregulation of DNMT1 messenger RNA, DNMT1 protein, and global DNA methylation levels in the SCNT embryos. Meanwhile, the survival rate after electrofusion (90.4% vs. 89.4% vs. 89.1%, P > 0.05) and developmental rates of the SCNT embryos (72.8% vs. 74.9% vs. 72.4%, P > 0.05; 29.7% vs. 31.7% vs. 29.7%, P > 0.05) were not significantly affected. In summary, siRNAs were effectively transfected into the SCNT embryos via the proposed method and exert their functions, and the normal development of preimplantation SCNT embryos was not affected by the method used.
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Affiliation(s)
- Hui Zhang
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China
| | - LiJun Wang
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China
| | - WenZhe Li
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China
| | - QingFu Mao
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China
| | - YongSheng Wang
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China
| | - Qian Li
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China
| | - Song Hua
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China
| | - Yong Zhang
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China.
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Kropp J, Peñagaricano F, Salih S, Khatib H. Invited review: Genetic contributions underlying the development of preimplantation bovine embryos. J Dairy Sci 2014; 97:1187-201. [DOI: 10.3168/jds.2013-7244] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2013] [Accepted: 11/08/2013] [Indexed: 01/09/2023]
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LONG CHARLESR, WESTHUSIN MARKE, GOLDING MICHAELC. Reshaping the transcriptional frontier: epigenetics and somatic cell nuclear transfer. Mol Reprod Dev 2014; 81:183-93. [PMID: 24167064 PMCID: PMC3953569 DOI: 10.1002/mrd.22271] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2013] [Accepted: 10/20/2013] [Indexed: 12/11/2022]
Abstract
Somatic-cell nuclear transfer (SCNT) experiments have paved the way to the field of cellular reprogramming. The demonstrated ability to clone over 20 different species to date has proven that the technology is robust but very inefficient, and is prone to developmental anomalies. Yet, the offspring from cloned animals exhibit none of the abnormalities of their parents, suggesting the low efficiency and high developmental mortality are epigenetic in origin. The epigenetic barriers to reprogramming somatic cells into a totipotent embryo capable of developing into a viable offspring are significant and varied. Despite their intimate relationship, chromatin structure and transcription are often not uniformly reprogramed after nuclear transfer, and many cloned embryos develop gene expression profiles that are hybrids between the donor cell and an embryonic blastomere. Recent advances in cellular reprogramming suggest that alteration of donor-cell chromatin structure towards that found in an normal embryo is actually the rate-limiting step in successful development of SCNT embryos. Here we review the literature relevant to the transformation of a somatic-cell nucleus into an embryo capable of full-term development. Interestingly, while resetting somatic transcription and associated epigenetic marks are absolutely required for development of SCNT embryos, life does not demand perfection.
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Affiliation(s)
- CHARLES R. LONG
- Department of Physiology and Pharmacology, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas
| | - MARK E. WESTHUSIN
- Department of Physiology and Pharmacology, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas
| | - MICHAEL C. GOLDING
- Department of Physiology and Pharmacology, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas
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Grazul-Bilska AT, Johnson ML, Borowicz PP, Baranko L, Redmer DA, Reynolds LP. Placental development during early pregnancy in sheep: effects of embryo origin on fetal and placental growth and global methylation. Theriogenology 2012; 79:94-102. [PMID: 23117132 DOI: 10.1016/j.theriogenology.2012.09.013] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2012] [Revised: 09/24/2012] [Accepted: 09/24/2012] [Indexed: 01/21/2023]
Abstract
The origin of embryos including those created through assisted reproductive technologies might have profound effects on placental and fetal development, possibly leading to compromised pregnancies associated with poor placental development. To determine the effects of embryo origin on fetal size, and maternal and fetal placental cellular proliferation and global methylation, pregnancies were achieved through natural mating (NAT), or transfer of embryos generated through in vivo (NAT-ET), IVF, or in vitro activation (IVA). On Day 22 of pregnancy, fetuses were measured and placental tissues were collected to immunologically detect Ki67 (a marker of proliferating cells) and 5-methyl cytosine followed by image analysis, and determine mRNA expression for three DNA methyltransferases. Fetal length and labeling index (proportion of proliferating cells) in maternal caruncles (maternal placenta) and fetal membranes (fetal placenta) were less (P < 0.001) in NAT-ET, IVF, and IVA than in NAT. In fetal membranes, expression of 5-methyl cytosine was greater (P < 0.02) in IVF and IVA than in NAT. In maternal caruncles, mRNA expression for DNMT1 was greater (P < 0.01) in IVA compared with the other groups, but DNMT3A expression was less (P < 0.04) in NAT-ET and IVA than in NAT. In fetal membranes, expression of mRNA for DNMT3A was greater (P < 0.01) in IVA compared with the other groups, and was similar in NAT, NAT-ET, and IVF groups. Thus, embryo origin might have specific effects on growth and function of ovine uteroplacental and fetal tissues through regulation of tissue growth, DNA methylation, and likely other mechanisms. These data provide a foundation for determining expression of specific factors regulating placental and fetal tissue growth and function in normal and compromised pregnancies, including those achieved with assisted reproductive technologies.
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Affiliation(s)
- Anna T Grazul-Bilska
- Department of Animal Sciences, Center for Nutrition and Pregnancy, North Dakota State University, Fargo, North Dakota, USA.
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Wang J, Wu Z, Li D, Li N, Dindot SV, Satterfield MC, Bazer FW, Wu G. Nutrition, epigenetics, and metabolic syndrome. Antioxid Redox Signal 2012; 17:282-301. [PMID: 22044276 PMCID: PMC3353821 DOI: 10.1089/ars.2011.4381] [Citation(s) in RCA: 187] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2011] [Accepted: 11/01/2011] [Indexed: 01/21/2023]
Abstract
SIGNIFICANCE Epidemiological and animal studies have demonstrated a close link between maternal nutrition and chronic metabolic disease in children and adults. Compelling experimental results also indicate that adverse effects of intrauterine growth restriction on offspring can be carried forward to subsequent generations through covalent modifications of DNA and core histones. RECENT ADVANCES DNA methylation is catalyzed by S-adenosylmethionine-dependent DNA methyltransferases. Methylation, demethylation, acetylation, and deacetylation of histone proteins are performed by histone methyltransferase, histone demethylase, histone acetyltransferase, and histone deacetyltransferase, respectively. Histone activities are also influenced by phosphorylation, ubiquitination, ADP-ribosylation, sumoylation, and glycosylation. Metabolism of amino acids (glycine, histidine, methionine, and serine) and vitamins (B6, B12, and folate) plays a key role in provision of methyl donors for DNA and protein methylation. CRITICAL ISSUES Disruption of epigenetic mechanisms can result in oxidative stress, obesity, insulin resistance, diabetes, and vascular dysfunction in animals and humans. Despite a recognized role for epigenetics in fetal programming of metabolic syndrome, research on therapies is still in its infancy. Possible interventions include: 1) inhibition of DNA methylation, histone deacetylation, and microRNA expression; 2) targeting epigenetically disturbed metabolic pathways; and 3) dietary supplementation with functional amino acids, vitamins, and phytochemicals. FUTURE DIRECTIONS Much work is needed with animal models to understand the basic mechanisms responsible for the roles of specific nutrients in fetal and neonatal programming. Such new knowledge is crucial to design effective therapeutic strategies for preventing and treating metabolic abnormalities in offspring born to mothers with a previous experience of malnutrition.
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Affiliation(s)
- Junjun Wang
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, China
| | - Zhenlong Wu
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, China
| | - Defa Li
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, China
| | - Ning Li
- State Key Laboratory of AgroBiotechnology, China Agricultural University, Beijing, China
| | - Scott V. Dindot
- Center for Animal Biotechnology and Genomics, Texas A&M University, College Station, Texas
- Department of Veterinary Pathobiology, Texas A&M University, College Station, Texas
- Department of Molecular and Cellular Medicine, Texas A&M University, College Station, Texas
| | - M. Carey Satterfield
- Center for Animal Biotechnology and Genomics, Texas A&M University, College Station, Texas
- Department of Animal Science, Texas A&M University, College Station, Texas
| | - Fuller W. Bazer
- Center for Animal Biotechnology and Genomics, Texas A&M University, College Station, Texas
- Department of Animal Science, Texas A&M University, College Station, Texas
| | - Guoyao Wu
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, China
- Center for Animal Biotechnology and Genomics, Texas A&M University, College Station, Texas
- Department of Animal Science, Texas A&M University, College Station, Texas
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You J, Kim J, Lee H, Hyun SH, Hansen PJ, Lee E. MG132 treatment during oocyte maturation improves embryonic development after somatic cell nuclear transfer and alters oocyte and embryo transcript abundance in pigs. Mol Reprod Dev 2011; 79:41-50. [PMID: 22083810 DOI: 10.1002/mrd.21402] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2011] [Accepted: 10/05/2011] [Indexed: 11/08/2022]
Abstract
The objective of this study was to examine the effect of treating pig oocytes during in vitro maturation (IVM) with a proteasome inhibitor, MG132, on oocyte maturation and embryonic development. In one series of experiments, oocytes from medium-sized follicles (3-8 mm in diameter) were untreated (MCO) or treated with MG132 during 0-22 hr (M0-22) or 30-42 hr (M30-42) of IVM. There was no significant effect of MG132 on nuclear maturation or cytoplasmic maturation (as assessed by intracellular amounts of glutathione and p34cdc2 kinase activity). Blastocyst formation after parthenogenetic activation (PA) and somatic cell nuclear transfer (SCNT), however, was increased for M30-42 (65.2% and 27.7% for PA and SCNT, respectively) compared to MCO (42.6% and 13.6%, respectively) and M0-22 (45.3% and 19.5%, respectively; P<0.05). Expression of PCNA and ERK2 was increased in M30-42 for IVM oocytes while transcript abundance for POUF51, DNMT1, FGFR2, and PCNA was increased in M30-42 for 4-cell SCNT embryos. When oocytes derived from small follicles (<3 mm in diameter) were untreated (SCO) or treated with MG132 during 0-22 hr (S0-22), 30-42 hr (S30-42) of IVM, or 0-22 and 30-42 hr of IVM (S0-22/30-42), expression of POU5F1, DNMT1, FGFR2, and PCNA and blastocyst formation were increased for SCNT embryos derived from S30 to 42 (16.5%) and S0-22/30-42 oocytes (20.8%) as compared to embryos from SCO (8.7%) or S0-22 oocytes (8.8%; P<0.05). Results demonstrate that treatment of oocytes with MG132 during the later stage of IVM improves embryonic development and alters gene expression in pigs.
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Affiliation(s)
- Jinyoung You
- College of Veterinary Medicine, Kangwon National University, Chuncheon, Korea
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