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Li YM, Chung YL, Wu YF, Wang CK, Chen CM, Chen YH. Maternal exposure to hyperbaric oxygen at the preimplantation stages increases apoptosis and ectopic Cdx2 expression and decreases Oct4 expression in mouse blastocysts via Nrf2-Notch1 upregulation and Nf2 downregulation. Dev Dyn 2024; 253:467-489. [PMID: 37850827 DOI: 10.1002/dvdy.671] [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: 06/25/2023] [Revised: 09/21/2023] [Accepted: 10/07/2023] [Indexed: 10/19/2023] Open
Abstract
BACKGROUND The environmental oxygen tension has been reported to impact the blastocyst quality and cell numbers in the inner cell mass (ICM) during human and murine embryogenesis. While the molecular mechanisms leading to increased ICM cell numbers and pluripotency gene expression under hypoxia have been deciphered, it remains unknown which regulatory pathways caused the underweight fetal body and overweight placenta after maternal exposure to hyperbaric oxygen (HBO). RESULTS The blastocysts from the HBO-exposed pregnant mice revealed significantly increased signals of reactive oxygen species (ROS) and nuclear Nrf2 staining, decreased Nf2 and Oct4 expression, increased nuclear Tp53bp1 and active caspase-3 staining, and ectopic nuclear signals of Cdx2, Yap, and the Notch1 intracellular domain (N1ICD) in the ICM. In the ICM of the HBO-exposed blastocysts, both Nf2 cDNA microinjection and Nrf2 shRNA microinjection significantly decreased the ectopic nuclear expression of Cdx2, Tp53bp1, and Yap whereas increased Oct4 expression, while Nrf2 shRNA microinjection also significantly decreased Notch1 mRNA levels and nuclear expression of N1ICD and active caspase-3. CONCLUSION We show for the first time that maternal exposure to HBO at the preimplantation stage induces apoptosis and impairs ICM cell specification via upregulating Nrf2-Notch1-Cdx2 expression and downregulating Nf2-Oct4 expression.
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Grants
- MAB-108-027 Medical Affairs Bureau, Ministry of National Defense, R.O.C., Taiwan
- MAB-109-029 Medical Affairs Bureau, Ministry of National Defense, R.O.C., Taiwan
- MND-MAB-110-031 Medical Affairs Bureau, Ministry of National Defense, R.O.C., Taiwan
- MND-MAB-C06-111022 Medical Affairs Bureau, Ministry of National Defense, R.O.C., Taiwan
- MND-MAB-C14-112058 Medical Affairs Bureau, Ministry of National Defense, R.O.C., Taiwan
- MOST-111-2635-B-016-002 Ministry of Science and Technology, Taiwan
- TSGH-D-109177 Tri-Service General Hospital in Taiwan, R.O.C.
- TSGH-E-109261 Tri-Service General Hospital in Taiwan, R.O.C.
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Affiliation(s)
- Yu-Ming Li
- Department of Integrative Immunobiology, Duke University School of Medicine, Durham, North Carolina, USA
- Department of Internal Medicine, Taichung Veterans General Hospital, Taichung City, Taiwan
| | - Yu Lang Chung
- Graduate Institute of Aerospace and Undersea Medicine, National Defense Medical Center, Taipei City, Taiwan
| | - Yung-Fu Wu
- Department of Medical Research, Tri-Service General Hospital, National Defense Medical Center, Taipei City, Taiwan
| | - Chien-Kuo Wang
- Department of Medical Research, Tri-Service General Hospital, National Defense Medical Center, Taipei City, Taiwan
| | - Chieh-Min Chen
- Graduate Institute of Microbiology and Immunology, National Defense Medical Center, Taipei City, Taiwan
| | - Yi-Hui Chen
- Graduate Institute of Aerospace and Undersea Medicine, National Defense Medical Center, Taipei City, Taiwan
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Sotomayor-Lugo F, Iglesias-Barrameda N, Castillo-Aleman YM, Casado-Hernandez I, Villegas-Valverde CA, Bencomo-Hernandez AA, Ventura-Carmenate Y, Rivero-Jimenez RA. The Dynamics of Histone Modifications during Mammalian Zygotic Genome Activation. Int J Mol Sci 2024; 25:1459. [PMID: 38338738 PMCID: PMC10855761 DOI: 10.3390/ijms25031459] [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: 12/29/2023] [Revised: 01/22/2024] [Accepted: 01/22/2024] [Indexed: 02/12/2024] Open
Abstract
Mammalian fertilization initiates the reprogramming of oocytes and sperm, forming a totipotent zygote. During this intricate process, the zygotic genome undergoes a maternal-to-zygotic transition (MZT) and subsequent zygotic genome activation (ZGA), marking the initiation of transcriptional control and gene expression post-fertilization. Histone modifications are pivotal in shaping cellular identity and gene expression in many mammals. Recent advances in chromatin analysis have enabled detailed explorations of histone modifications during ZGA. This review delves into conserved and unique regulatory strategies, providing essential insights into the dynamic changes in histone modifications and their variants during ZGA in mammals. The objective is to explore recent advancements in leading mechanisms related to histone modifications governing this embryonic development phase in depth. These considerations will be useful for informing future therapeutic approaches that target epigenetic regulation in diverse biological contexts. It will also contribute to the extensive areas of evolutionary and developmental biology and possibly lay the foundation for future research and discussion on this seminal topic.
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Affiliation(s)
| | | | | | | | | | | | | | - Rene Antonio Rivero-Jimenez
- Abu Dhabi Stem Cells Center, Abu Dhabi P.O. Box 4600, United Arab Emirates; (F.S.-L.); (N.I.-B.); (Y.M.C.-A.); (I.C.-H.); (C.A.V.-V.); (A.A.B.-H.); (Y.V.-C.)
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Integrative Proteomic Profiling Reveals PRC2-Dependent Epigenetic Crosstalk Maintains Ground-State Pluripotency. Cell Stem Cell 2019; 24:123-137.e8. [DOI: 10.1016/j.stem.2018.10.017] [Citation(s) in RCA: 71] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Revised: 04/06/2018] [Accepted: 10/12/2018] [Indexed: 12/28/2022]
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Ho NTK, Nguyen TVT, Nguyen TV, Bui HT. Epigenetic impairments in development of parthenogenetic preimplantation mouse embryos. J Reprod Dev 2018; 65:83-90. [PMID: 30606958 PMCID: PMC6379762 DOI: 10.1262/jrd.2018-028] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Parthenogenesis is an activation process of oocytes that occur without the participation of sperm. Evidence suggests that normal development of embryos requires proper expression of several
imprinted genes inherited from both the paternal and maternal genomes. Compared to gene expression, histone modifications and chromatin remodeling are not well-documented. In this research,
by using immunofluorescence staining for several developmental-associated histone modifications, we investigated whether epigenetic impairments in parthenogenetic embryos act as constraints
for proper development. At early stages, fertilized embryos exhibited high methylation of histone H3 at lysine 9 (Me-H3-K9) and Heterochromatin Protein 1 (HP1) present in the maternal
chromatin, while paternal chromatin showed weaker HP1 signals. We found that at the two-cell stage in fertilized embryos, HP1, initially detected around the nucleolus, colocalized with
chromocenters at one pole of the blastomere, while parthenotes showed a diffused distribution pattern of HP1 throughout the entire nucleoplasm. At the four-cell stage, methylation of histone
H3 at arginine 26 (Me-H3-R26) increased at nascent RNA repression sites in fertilized embryos, while parthenotes recorded weaker signals throughout the nucleoplasm, suggesting differences in
pluripotency of the ICM cells between the two types of embryos. Moreover, at the blastocyst stage, we observed that the acetylation level of histone H4 at lysine 12 (Ac-H4-K12) was
significantly decreased in parthenogenetic ICM compared to that in its fertilized counterpart. To summarize, differences in epigenetic modifications correlating with paternal chromatin’s
capacity to regulate nascent RNA repression may contribute to aberrant development and lineage allocation in mouse parthenogenetic embryos.
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Affiliation(s)
- Ngan Thi Kim Ho
- Cellular Reprogramming Laboratory, School of Biotechnology, International University, Vietnam National University, Ho Chi Minh City 700000, Vietnam
| | - Thuy Van Thi Nguyen
- Cellular Reprogramming Laboratory, School of Biotechnology, International University, Vietnam National University, Ho Chi Minh City 700000, Vietnam
| | - Thuan Van Nguyen
- Cellular Reprogramming Laboratory, School of Biotechnology, International University, Vietnam National University, Ho Chi Minh City 700000, Vietnam
| | - Hong-Thuy Bui
- Cellular Reprogramming Laboratory, School of Biotechnology, International University, Vietnam National University, Ho Chi Minh City 700000, Vietnam
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Chen X, Zhu Z, Yu F, Huang J, Jia R, Pan J. Effect of shRNA-mediated Xist knockdown on the quality of porcine parthenogenetic embryos. Dev Dyn 2018; 248:140-148. [PMID: 30055068 DOI: 10.1002/dvdy.24660] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2018] [Revised: 06/27/2018] [Accepted: 07/13/2018] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Parthenogenetically activated oocytes exhibit poor embryo development and lower total numbers of cells per blastocyst accompanied by abnormally increased expression of Xist, a long noncoding RNA that plays an important role in triggering X chromosome inactivation during embryogenesis. RESULTS To investigate whether knockdown of Xist influences parthenogenetic development in pigs. We developed an anti-Xist short hairpin RNA (shRNA) vector, which can significantly inhibit Xist expression for at least seven days when injected at 12-13 hr after parthenogenetic activation. Embryonic cleavage, blastocyst formation, and total blastocyst cell numbers were compared during the blastocyst stage, as well as the expression of an X-linked gene and three pluripotent transcription factors. Knockdown of Xist significantly increases the total blastocyst cell number, but does not influence the rate of embryo cleavage and blastocyst formation. The expressions of Sox2, Nanog, and Oct4 were also significantly improved in the injected embryos compared with the control at the blastocyst stage, but the Foxp3 expression level was not increased significantly. CONCLUSIONS The present study provides valuable information for understanding the role of Xist in parthenogenesis and presents a new approach for improving the quality of porcine parthenogenetic embryos. Developmental Dynamics 248:140-148, 2019. © 2018 Wiley Periodicals, Inc.
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Affiliation(s)
- Xiaoyu Chen
- Institute of Animal Husbandry and Veterinary Science, Zhejiang Academy of Agriculture Science, Hangzhou, Zhejiang, P.R. China
| | - Zhiwei Zhu
- Institute of Animal Husbandry and Veterinary Science, Zhejiang Academy of Agriculture Science, Hangzhou, Zhejiang, P.R. China
| | - Fuxian Yu
- Institute of Animal Husbandry and Veterinary Science, Zhejiang Academy of Agriculture Science, Hangzhou, Zhejiang, P.R. China
| | - Jing Huang
- Institute of Animal Husbandry and Veterinary Science, Zhejiang Academy of Agriculture Science, Hangzhou, Zhejiang, P.R. China
| | - Ruoxin Jia
- Institute of Animal Husbandry and Veterinary Science, Zhejiang Academy of Agriculture Science, Hangzhou, Zhejiang, P.R. China
| | - Jianzhi Pan
- Institute of Animal Husbandry and Veterinary Science, Zhejiang Academy of Agriculture Science, Hangzhou, Zhejiang, P.R. China
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Wu F, Liu Y, Wu Q, Li D, Zhang L, Wu X, Wang R, Zhang D, Gao S, Li W. Long non-coding RNAs potentially function synergistically in the cellular reprogramming of SCNT embryos. BMC Genomics 2018; 19:631. [PMID: 30139326 PMCID: PMC6107955 DOI: 10.1186/s12864-018-5021-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Accepted: 08/15/2018] [Indexed: 01/28/2023] Open
Abstract
BACKGROUND Long non-coding RNAs (lncRNAs), a type of epigenetic regulator, are thought to play important roles in embryonic development in mice, and several developmental defects are associated with epigenetic modification disorders. The most dramatic epigenetic reprogramming event occurs during somatic cell nuclear transfer (SCNT) when the expression profile of a differentiated cell is abolished, and a newly embryo-specific expression profile is established. However, the molecular mechanism underlying somatic reprogramming remains unclear, and the dynamics and functions of lncRNAs in this process have not yet been illustrated, resulting in inefficient reprogramming. RESULTS In this study, 63 single-cell RNA-seq libraries were first generated and sequenced. A total of 7009 mouse polyadenylation lncRNAs (including 5204 novel lncRNAs) were obtained, and a comprehensive analysis of in vivo and SCNT mouse pre-implantation embryo lncRNAs was further performed based on our single-cell RNA sequencing data. Expression profile analysis revealed that lncRNAs were expressed in a developmental stage-specific manner during mouse early-stage embryonic development, whereas a more temporal and spatially specific expression pattern was identified in mouse SCNT embryos with changes in the state of chromatin during somatic cell reprogramming, leading to incomplete zygotic genome activation, oocyte to embryo transition and 2-cell to 4-cell transition. No obvious differences between other stages and mouse NTC or NTM embryos at the same stage were observed. Gene oncology (GO) enrichment analysis, Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis and weighted gene co-expression network analysis (WGCNA) of lncRNAs and their association with known protein-coding genes suggested that several lncRNAs and their associated with known protein-coding genes might be involved in mouse embryonic development and cell reprogramming. CONCLUSIONS This is a novel report on the expression landscapes of lncRNAs of mouse NT embryos by scRNA-seq analysis. This study will provide insight into the molecular mechanism underlying the involvement of lncRNAs in mouse pre-implantation embryonic development and epigenetic reprogramming in mammalian species after SCNT-based cloning.
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Affiliation(s)
- Fengrui Wu
- Anhui Province Key Laboratory of Environmental Hormone and Reproduction, Anhui Province Key Laboratory of Embryo Development and Reproductive Regulation, Fuyang Normal University, Fuyang, China
| | - Yong Liu
- Anhui Province Key Laboratory of Environmental Hormone and Reproduction, Anhui Province Key Laboratory of Embryo Development and Reproductive Regulation, Fuyang Normal University, Fuyang, China
| | - Qingqing Wu
- Anhui Province Key Laboratory of Environmental Hormone and Reproduction, Anhui Province Key Laboratory of Embryo Development and Reproductive Regulation, Fuyang Normal University, Fuyang, China
| | - Dengkun Li
- Anhui Province Key Laboratory of Environmental Hormone and Reproduction, Anhui Province Key Laboratory of Embryo Development and Reproductive Regulation, Fuyang Normal University, Fuyang, China
| | - Ling Zhang
- Anhui Province Key Laboratory of Environmental Hormone and Reproduction, Anhui Province Key Laboratory of Embryo Development and Reproductive Regulation, Fuyang Normal University, Fuyang, China
| | - Xiaoqing Wu
- Anhui Province Key Laboratory of Environmental Hormone and Reproduction, Anhui Province Key Laboratory of Embryo Development and Reproductive Regulation, Fuyang Normal University, Fuyang, China
| | - Rong Wang
- Anhui Province Key Laboratory of Environmental Hormone and Reproduction, Anhui Province Key Laboratory of Embryo Development and Reproductive Regulation, Fuyang Normal University, Fuyang, China
| | - Di Zhang
- Anhui Province Key Laboratory of Environmental Hormone and Reproduction, Anhui Province Key Laboratory of Embryo Development and Reproductive Regulation, Fuyang Normal University, Fuyang, China
| | - Shaorong Gao
- School of Life Sciences and Technology, Tongji University, Shanghai, China
| | - Wenyong Li
- Anhui Province Key Laboratory of Environmental Hormone and Reproduction, Anhui Province Key Laboratory of Embryo Development and Reproductive Regulation, Fuyang Normal University, Fuyang, China
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