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Li XH, Lee SH, Lu QY, Zhan CL, Lee GH, Kim JD, Sim JM, Song HJ, Cui XS. MAT2A is essential for zygotic genome activation by maintaining of histone methylation in porcine embryos. Theriogenology 2024; 230:81-90. [PMID: 39276507 DOI: 10.1016/j.theriogenology.2024.09.006] [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: 06/06/2024] [Revised: 08/18/2024] [Accepted: 09/08/2024] [Indexed: 09/17/2024]
Abstract
Methionine adenosyltransferase 2A (MAT2A) is an essential enzyme in the methionine cycle that generates S-adenosylmethionine (SAM) by reacting with methionine and ATP. SAM acts as a methyl donors for histone and DNA methylation, which plays key roles in zygotic genome activation (ZGA). However, the effects of MAT2A on porcine ZGA remain unclear. To investigate the function of MAT2A and its underlying mechanism in porcine ZGA, MAT2A was knocked down by double-stranded RNA injection at the 1-cell stage. MAT2A is highly expressed at every stage of porcine embryo development. The percentages of four-cell-stage embryos and blastocysts were lower in the MAT2A-knockdown (KD) group than in the control group. Notably, depletion of MAT2A decreased the levels of H3K4me2, H3K9me2/3, and H3K27me3 at the four-cell stage, whereas MAT2A KD reduced the transcriptional activity of ZGA genes. MAT2A KD decreased embryonic ectoderm development (EED) and enhancer of zeste homolog 2 (EZH2) expression. Exogenous SAM supplementation rescued histone methylation levels and developmental arrest induced by MAT2A KD. Additionally, MAT2A KD significantly increased DNA damage and apoptosis. In conclusion, MAT2A is involved in regulating transcriptional activity and is essential for regulating histone methylation during porcine ZGA.
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Affiliation(s)
- Xiao-Han Li
- Department of Animal Science, Chungbuk National University, Cheongju, Chungbuk, 28644, Republic of Korea
| | - Song-Hee Lee
- Department of Animal Science, Chungbuk National University, Cheongju, Chungbuk, 28644, Republic of Korea
| | - Qin-Yue Lu
- Department of Animal Science, Chungbuk National University, Cheongju, Chungbuk, 28644, Republic of Korea
| | - Cheng-Lin Zhan
- Department of Animal Science, Chungbuk National University, Cheongju, Chungbuk, 28644, Republic of Korea
| | - Gyu-Hyun Lee
- Department of Animal Science, Chungbuk National University, Cheongju, Chungbuk, 28644, Republic of Korea
| | - Ji-Dam Kim
- Department of Animal Science, Chungbuk National University, Cheongju, Chungbuk, 28644, Republic of Korea
| | - Jae-Min Sim
- Department of Animal Science, Chungbuk National University, Cheongju, Chungbuk, 28644, Republic of Korea
| | - Hyeon-Ji Song
- Department of Animal Science, Chungbuk National University, Cheongju, Chungbuk, 28644, Republic of Korea
| | - Xiang-Shun Cui
- Department of Animal Science, Chungbuk National University, Cheongju, Chungbuk, 28644, Republic of Korea.
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Kumar D, Tiwari M, Goel P, Singh MK, Selokar NL, Palta P. Comparative transcriptome profile of embryos at different developmental stages derived from somatic cell nuclear transfer (SCNT) and in-vitro fertilization (IVF) in riverine buffalo (Bubalus bubalis). Vet Res Commun 2024; 48:2457-2475. [PMID: 38829518 DOI: 10.1007/s11259-024-10419-8] [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: 02/29/2024] [Accepted: 05/17/2024] [Indexed: 06/05/2024]
Abstract
Somatic cell nuclear transfer (SCNT) is a very important reproductive technology with many diverse applications, such as fast multiplication of elite animals, the production of transgenic animals and embryonic stem (ES) cells. However, low cloning efficiency, a low live birth rate and the abnormally high incidence of abnormalities in the offspring born are attributed to incomplete or aberrant nuclear reprogramming. In SCNT embryos, the aberrant expression pattern of the genes throughout embryonic development is responsible for the incomplete nuclear reprogramming. The present study was carried out to identify the differential gene expression (DEGs) profile and molecular pathways of the SCNT and IVF embryos at different developmental stages (2 cell, 8 cell and blastocyst stages). In the present study, 1164 (2 cell), 1004 (8 cell) and 530 (blastocyst stage) DEGs were identified in the SCNT embryos as compared to IVF embryos. In addition, several genes such as ZEB1, GDF1, HSF5, PDE3B, VIM, TNNC, HSD3B1, TAGLN, ITGA4 and AGMAT were affecting the development of SCNT embryos as compared to IVF embryos. Further, Gene Ontology (GO) and molecular pathways analysis suggested, SCNT embryos exhibit variations compared to their IVF counterparts and affected the development of embryos throughout the different developmental stages. Apart from this, q-PCR analysis of the GDF1, TMEM114, and IGSF22 genes were utilized to validate the RNA-seq data. These findings contribute valuable insights about the different genes and molecular pathways underlying SCNT embryo development and offer crucial information for improving SCNT efficiency.
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Affiliation(s)
- Deepak Kumar
- ICAR- National Dairy Research Institute, Karnal, India
| | - Manish Tiwari
- ICAR- National Dairy Research Institute, Karnal, India.
| | - Pallavi Goel
- ICAR- National Dairy Research Institute, Karnal, India
| | | | | | - Prabhat Palta
- ICAR- National Dairy Research Institute, Karnal, India.
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Muhandiram S, Dissanayake K, Orro T, Godakumara K, Kodithuwakku S, Fazeli A. Secretory Proteomic Responses of Endometrial Epithelial Cells to Trophoblast-Derived Extracellular Vesicles. Int J Mol Sci 2023; 24:11924. [PMID: 37569298 PMCID: PMC10418763 DOI: 10.3390/ijms241511924] [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: 06/21/2023] [Revised: 07/14/2023] [Accepted: 07/18/2023] [Indexed: 08/13/2023] Open
Abstract
Synchronized crosstalk between the embryo and endometrium during the periconception period is integral to pregnancy establishment. Increasing evidence suggests that the exchange of extracellular vesicles (EVs) of both embryonic and endometrial origin is a critical component of embryo-maternal communication during peri-implantation. Here, we investigated whether embryonic signals in the form of EVs can modulate the endometrial epithelial cell secretome. Receptive endometrial analog RL95-2 cells were supplemented with trophoblast analog JAr cell-derived EVs, and the secretory protein changes occurring in the RL95-2 cells were analyzed using mass spectrometry. EVs of non-trophoblastic origin (HEK 293 cells) were used as the control EV source to supplement endometrial cells. Trophoblast cell-derived EVs enriched endometrial epithelial cell secretions with proteins that support embryo development, attachment, or implantation, whereas control EVs were unable to induce the same effect. The present study suggests that embryonic signals in the form of EVs may prime receptive endometrial epithelial cells to enrich their secretory proteome with critical proteomic molecules with functional importance for periconception milieu formation.
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Affiliation(s)
- Subhashini Muhandiram
- Institute of Veterinary Medicine and Animal Sciences, Estonian University of Life Sciences, Kreutzwaldi 62, 51006 Tartu, Estonia; (S.M.); (K.D.); (T.O.); (K.G.); (S.K.)
| | - Keerthie Dissanayake
- Institute of Veterinary Medicine and Animal Sciences, Estonian University of Life Sciences, Kreutzwaldi 62, 51006 Tartu, Estonia; (S.M.); (K.D.); (T.O.); (K.G.); (S.K.)
- Department of Pathophysiology, Institute of Biomedicine and Translational Medicine, University of Tartu, Ravila St. 14B, 50411 Tartu, Estonia
- Department of Anatomy, Faculty of Medicine, University of Peradeniya, Kandy 20400, Sri Lanka
| | - Toomos Orro
- Institute of Veterinary Medicine and Animal Sciences, Estonian University of Life Sciences, Kreutzwaldi 62, 51006 Tartu, Estonia; (S.M.); (K.D.); (T.O.); (K.G.); (S.K.)
| | - Kasun Godakumara
- Institute of Veterinary Medicine and Animal Sciences, Estonian University of Life Sciences, Kreutzwaldi 62, 51006 Tartu, Estonia; (S.M.); (K.D.); (T.O.); (K.G.); (S.K.)
| | - Suranga Kodithuwakku
- Institute of Veterinary Medicine and Animal Sciences, Estonian University of Life Sciences, Kreutzwaldi 62, 51006 Tartu, Estonia; (S.M.); (K.D.); (T.O.); (K.G.); (S.K.)
- Department of Animal Science, Faculty of Agriculture, University of Peradeniya, Kandy 20400, Sri Lanka
| | - Alireza Fazeli
- Institute of Veterinary Medicine and Animal Sciences, Estonian University of Life Sciences, Kreutzwaldi 62, 51006 Tartu, Estonia; (S.M.); (K.D.); (T.O.); (K.G.); (S.K.)
- Department of Pathophysiology, Institute of Biomedicine and Translational Medicine, University of Tartu, Ravila St. 14B, 50411 Tartu, Estonia
- Academic Unit of Reproductive and Developmental Medicine, Department of Oncology and Metabolism, Medical School, University of Sheffield, Sheffield S10 2TN, UK
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Cai S, Quan S, Yang G, Zeng X, Wang X, Ye C, Li H, Wang G, Zeng X, Qiao S. DDIT3 regulates key enzymes in the methionine cycle and flux during embryonic development. J Nutr Biochem 2023; 111:109176. [PMID: 36220527 DOI: 10.1016/j.jnutbio.2022.109176] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 08/14/2022] [Accepted: 08/19/2022] [Indexed: 11/09/2022]
Abstract
One-carbon metabolism is a key metabolic network that integrates nutritional signals with embryonic development. However, the response of one-carbon metabolism to methionine status and the regulatory mechanisms are poorly understood. Herein, we found that methionine supplementation during pregnancy significantly increased fetal number and average fetal weight. In addition, methionine modulated one-carbon metabolism primarily through 2 metabolic enzymes, cystathionine β-synthase (CBS) and methionine adenosyltransferase 2A (MAT2A), which were significantly increased in fetal liver tissues and porcine trophoblast (pTr) cells in response to proper methionine supplementation. CBS and MAT2A overexpression enhanced the DNA synthesis in pTr cells. More importantly, we identified a transcription factor, DNA damage-inducible transcript 3 (DDIT3), that was the primary regulator of CBS and MAT2A, which bound directly to promoters and negatively regulated the expression of CBS and MAT2A. Taken together, our findings identified that DDIT3 targeting CBS and MAT2A was a novel regulatory pathway that mediated cellular one-carbon metabolism in response to methionine signal and provided promising targets to improve pregnancy health.
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Affiliation(s)
- Shuang Cai
- State Key Laboratory of Animal Nutrition, Ministry of Agriculture Feed Industry Center, China Agricultural University, Beijing, China; Beijing Key Laboratory of Bio-feed Additives, China Agricultural University, Beijing, China
| | - Shuang Quan
- State Key Laboratory of Animal Nutrition, Ministry of Agriculture Feed Industry Center, China Agricultural University, Beijing, China; Beijing Key Laboratory of Bio-feed Additives, China Agricultural University, Beijing, China
| | - Guangxin Yang
- State Key Laboratory of Animal Nutrition, Ministry of Agriculture Feed Industry Center, China Agricultural University, Beijing, China; Beijing Key Laboratory of Bio-feed Additives, China Agricultural University, Beijing, China
| | - Xiangzhou Zeng
- State Key Laboratory of Animal Nutrition, Ministry of Agriculture Feed Industry Center, China Agricultural University, Beijing, China; Beijing Key Laboratory of Bio-feed Additives, China Agricultural University, Beijing, China
| | - Xinyu Wang
- State Key Laboratory of Animal Nutrition, Ministry of Agriculture Feed Industry Center, China Agricultural University, Beijing, China; Beijing Key Laboratory of Bio-feed Additives, China Agricultural University, Beijing, China
| | - Changchuan Ye
- State Key Laboratory of Animal Nutrition, Ministry of Agriculture Feed Industry Center, China Agricultural University, Beijing, China; Beijing Key Laboratory of Bio-feed Additives, China Agricultural University, Beijing, China
| | - Huan Li
- State Key Laboratory of Animal Nutrition, Ministry of Agriculture Feed Industry Center, China Agricultural University, Beijing, China; Beijing Key Laboratory of Bio-feed Additives, China Agricultural University, Beijing, China
| | - Gang Wang
- State Key Laboratory of Animal Nutrition, Ministry of Agriculture Feed Industry Center, China Agricultural University, Beijing, China; Beijing Key Laboratory of Bio-feed Additives, China Agricultural University, Beijing, China
| | - Xiangfang Zeng
- State Key Laboratory of Animal Nutrition, Ministry of Agriculture Feed Industry Center, China Agricultural University, Beijing, China; Beijing Key Laboratory of Bio-feed Additives, China Agricultural University, Beijing, China.
| | - Shiyan Qiao
- State Key Laboratory of Animal Nutrition, Ministry of Agriculture Feed Industry Center, China Agricultural University, Beijing, China; Beijing Key Laboratory of Bio-feed Additives, China Agricultural University, Beijing, China
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Abedal-Majed MA, Titi HH, Al-Qaisi M, Abdelqader A, Tabbaa MJ. The effects of rumen protected methionine supplementation on the performance of primiparous dairy cows using the Presynch-Ovsynch protocol. Anim Sci J 2023; 94:e13835. [PMID: 37144633 DOI: 10.1111/asj.13835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 03/24/2023] [Accepted: 04/06/2023] [Indexed: 05/06/2023]
Abstract
The purpose of this study was to examine the effects of rumen-protected methionine (RPM) supplementation on the reproductive and productive performance of primiparous dairy cows fed two levels of protein. The Presynch-Ovsynch protocol was used to synchronize 36 lactating Holstein cows that were assigned randomly to one of six dietary treatments: (1) 14% CP and without RPM diet (14CP-0RPM; n = 6), (2) 14% CP and 15 g/head/day RPM (14CP-15RPM; n = 6), (3) 14% CP and 25 g/head/day RPM (14CP-25RPM; n = 6), (4) 16% CP and without RPM diet (16CP-0RPM; n = 6), (5) 16% CP and 15 g/head/day RPM (16CP-15RPM; n = 6), and (6) 16% CP and 25 g/head/day RPM (16CP-25RPM; n = 6). Independent of CP levels, feeding RPM had reduced the calving interval (P < 0.01). Feeding RPM increased (P < 0.01) overall plasma progesterone (P4). Feeding 16CP-15RPM increased (P < 0.01) overall plasma P4. Feeding 16% CP increased (P < 0.01) 4% fat corrected milk, energy corrected milk, milk fat and protein yield, and milk casein. Moreover, feeding the 25RPM has increased (P < 0.01) 4% fat corrected milk, energy corrected milk, milk fat, and protein yield. Compared with other treatments, feeding 16CP-25RPM or 16CP-15RPM enhanced (P < 0.01) milk yield and milk fat yield. In conclusion, feeding 16% CP with RPM boosted the productivity and reduced the calving interval in primiparous lactating dairy cows.
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Affiliation(s)
| | - Hosam Hani Titi
- Department of Animal Production, School of Agriculture, The University of Jordan, Amman, Jordan
| | - Mohmmad Al-Qaisi
- Department of Animal Production, School of Agriculture, The University of Jordan, Amman, Jordan
| | - Anas Abdelqader
- Department of Animal Production, School of Agriculture, The University of Jordan, Amman, Jordan
| | - Mohammad Jihad Tabbaa
- Department of Animal Production, School of Agriculture, The University of Jordan, Amman, Jordan
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Interspecific Variation in One-Carbon Metabolism within the Ovarian Follicle, Oocyte, and Preimplantation Embryo: Consequences for Epigenetic Programming of DNA Methylation. Int J Mol Sci 2021; 22:ijms22041838. [PMID: 33673278 PMCID: PMC7918761 DOI: 10.3390/ijms22041838] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2021] [Revised: 02/07/2021] [Accepted: 02/09/2021] [Indexed: 02/07/2023] Open
Abstract
One-carbon (1C) metabolism provides methyl groups for the synthesis and/or methylation of purines and pyrimidines, biogenic amines, proteins, and phospholipids. Our understanding of how 1C pathways operate, however, pertains mostly to the (rat) liver. Here we report that transcripts for all bar two genes (i.e., BHMT, MAT1A) encoding enzymes in the linked methionine-folate cycles are expressed in all cell types within the ovarian follicle, oocyte, and blastocyst in the cow, sheep, and pig; as well as in rat granulosa cells (GCs) and human KGN cells (a granulosa-like tumor cell line). Betaine-homocysteine methyltransferase (BHMT) protein was absent in bovine theca and GCs, as was activity of this enzyme in GCs. Mathematical modeling predicted that absence of this enzyme would lead to more volatile S-adenosylmethionine-mediated transmethylation in response to 1C substrate (e.g., methionine) or cofactor provision. We tested the sensitivity of bovine GCs to reduced methionine (from 50 to 10 µM) and observed a diminished flux of 1C units through the methionine cycle. We then used reduced-representation bisulfite sequencing to demonstrate that this reduction in methionine during bovine embryo culture leads to genome-wide alterations to DNA methylation in >1600 genes, including a cohort of imprinted genes linked to an abnormal fetal-overgrowth phenotype. Bovine ovarian and embryonic cells are acutely sensitive to methionine, but further experimentation is required to determine the significance of interspecific variation in BHMT expression.
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7
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Cai S, Ye Q, Zeng X, Yang G, Ye C, Chen M, Yu H, Wang Y, Wang G, Huang S, Quan S, Zeng X, Qiao S. CBS and MAT2A improve methionine-mediated DNA synthesis through SAMTOR/mTORC1/S6K1/CAD pathway during embryo implantation. Cell Prolif 2020; 54:e12950. [PMID: 33179842 PMCID: PMC7791180 DOI: 10.1111/cpr.12950] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 10/08/2020] [Accepted: 10/14/2020] [Indexed: 01/06/2023] Open
Abstract
Objectives Early pregnancy loss is a major clinical concern in animal and human reproduction, which is largely influenced by embryo implantation. The importance of methionine for embryo implantation is widely neglected. Materials and methods We performed a series of experiments with primiparous rats fed diets containing different levels of methionine during early pregnancy to investigate the role of methionine in embryonic implantation and pregnancy outcomes, and used them to perform in vivo metabolic assessments and in vitro uterine explant culture. In addition, through transcriptome analysis and silencing the expression of cystathionine β‐synthase (CBS, the key enzyme in transsulfuration pathway) and cell adhesion assay, we measured signalling within Ishikawa, pTr and JAR cells. Results We determined the relevance and underlying mechanism of methionine on embryo implantation. We showed that methionine deprivation sharply decreased embryo implantation sites, expression of CBS and transsulfuration pathway end products, which were reversed by maternal methionine supplementation during early pregnancy. Moreover, we found CBS improved methionine‐mediated cell proliferation and DNA synthesis by CBS inhibition or interference. In addition, transcriptome analysis also revealed that CBS influenced the signalling pathway‐associated cell proliferation and DNA synthesis, as well as a correlation between CBS and methionine adenosyltransferase 2A (MAT2A), implying that MAT2A was possibly involved in cell proliferation and DNA synthesis. Further analysis revealed that MAT2A influenced S‐adenosylmethionine receptor SAMTOR expression, and SAMTOR activated mTORC1 and its downstream S6K1 and CAD, ultimately enhancing DNA synthesis in the embryo and uterus. Conclusions Taken together, these studies demonstrate that CBS and MAT2A improve methionine‐mediated DNA synthesis through SAMTOR/mTORC1/S6K1/CAD pathway during embryo implantation.
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Affiliation(s)
- Shuang Cai
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, China.,Beijing Key Laboratory of Bio-feed Additives, China Agricultural University, Beijing, China
| | - Qianhong Ye
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, China.,Beijing Key Laboratory of Bio-feed Additives, China Agricultural University, Beijing, China
| | - Xiangzhou Zeng
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, China.,Beijing Key Laboratory of Bio-feed Additives, China Agricultural University, Beijing, China
| | - Guangxin Yang
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, China.,Beijing Key Laboratory of Bio-feed Additives, China Agricultural University, Beijing, China
| | - Changchuan Ye
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, China.,Beijing Key Laboratory of Bio-feed Additives, China Agricultural University, Beijing, China
| | - Meixia Chen
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, China.,Beijing Key Laboratory of Bio-feed Additives, China Agricultural University, Beijing, China
| | - Haitao Yu
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, China.,Beijing Key Laboratory of Bio-feed Additives, China Agricultural University, Beijing, China
| | - Yuming Wang
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, China.,Beijing Key Laboratory of Bio-feed Additives, China Agricultural University, Beijing, China
| | - Gang Wang
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, China.,Beijing Key Laboratory of Bio-feed Additives, China Agricultural University, Beijing, China
| | - Shuo Huang
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, China.,Beijing Key Laboratory of Bio-feed Additives, China Agricultural University, Beijing, China
| | - Shuang Quan
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, China.,Beijing Key Laboratory of Bio-feed Additives, China Agricultural University, Beijing, China
| | - Xiangfang Zeng
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, China.,Beijing Key Laboratory of Bio-feed Additives, China Agricultural University, Beijing, China
| | - Shiyan Qiao
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, China.,Beijing Key Laboratory of Bio-feed Additives, China Agricultural University, Beijing, China
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Embryonic MTHFR contributes to blastocyst development. J Assist Reprod Genet 2020; 37:1807-1814. [PMID: 32767205 DOI: 10.1007/s10815-020-01898-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Accepted: 07/20/2020] [Indexed: 10/23/2022] Open
Abstract
PURPOSE Reduction in methylenetetrahydrofolate reductase (MTHFR) activity due to genetic variations in the MTHFR gene has been controversially implicated in subfertility in human in vitro fertilization. However, there is no direct gene-knockdown study of embryonic MTHFR to assess its involvement in mammalian preimplantation development. The purpose of this study is to investigate expression profiles and functional roles of MTHFR in bovine preimplantation development. METHODS Reverse transcription-quantitative PCR (RT-qPCR) and analysis of publicly available RNA-seq data were performed to reveal expression levels of MTHFR during bovine preimplantation development. We knocked down MTHFR by siRNA-mediated RNA interference from the 8- to 16-cell stage and assessed the effects on preimplantation development. RESULTS The RT-qPCR analysis showed relatively high MTHFR expression at the GV oocyte stage, which was decreased toward the 8- to 16-cell stage and then slightly restored at the blastocyst stage. Public data-based analysis also showed the similar pattern of expression with substantial embryonic expression at the blastocyst stage. MTHFR knockdown reduced the blastocyst rate (P < 0.01) and the numbers of total (P < 0.0001), trophectoderm (P < 0.0001), and inner cell mass (P < 0.001) cells. CONCLUSION The results indicate that embryonic MTHFR is indispensable for normal blastocyst development. The findings provide insight into the debatable roles of MTHFR in fertility and may be applicable for the improvement of care for early embryos via modulation of surrounding folate-related nutritional conditions in vitro and/or in utero, depending on the parental and embryonic MTHFR genotype.
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Sun H, Kang J, Su J, Zhang J, Zhang L, Liu X, Zhang J, Wang F, Lu Z, Xing X, Chen H, Zhang Y. Methionine adenosyltransferase 2A regulates mouse zygotic genome activation and morula to blastocyst transition†. Biol Reprod 2020; 100:601-617. [PMID: 30265288 DOI: 10.1093/biolre/ioy194] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2018] [Revised: 07/26/2018] [Accepted: 09/26/2018] [Indexed: 01/02/2023] Open
Abstract
Methionine adenosyltransferase II (MAT2A) is essential to the synthesis of S-adenosylmethionine, a major methyl donor, from L-methionine and ATP. Upon fertilization, zygotic genome activation (ZGA) marks the period that transforms the genome from transcriptional quiescence to robust transcriptional activity. During this period, embryonic epigenome undergoes extensive modifications, including histone methylation changes. However, whether MAT2A participates in histone methylation at the ZGA stage is unknown. Herein, we identified that MAT2A is a pivotal factor for ZGA in mouse embryos. Mat2a knockdown exhibited 2-cell embryo arrest and reduced transcriptional activity but did not affect H3K4me2/3 and H3K9me2/3. When the cycloleucine, a selective inhibitor of MAT2A catalytic activity, was added to a culture medium, embryos were arrested at the morula stage in the same manner as the embryos cultured in an L-methionine-deficient medium. Under these two culture conditions, H3K4me3 levels of morula and blastocyst were much lower than those cultured under normal medium. Furthermore, cycloleucine treatment or methionine starvation apparently reduced the developmental potential of blastocysts. Thus, Mat2a is indispensable for ZGA and morula-to-blastocyst transition.
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Affiliation(s)
- Hongzheng Sun
- College of Veterinary Medicine, Northwest A&F University, Key Laboratory of Animal Biotechnology of the Ministry of Agriculture, Yangling, Shaanxi Province, China
| | - Jian Kang
- College of Veterinary Medicine, Northwest A&F University, Key Laboratory of Animal Biotechnology of the Ministry of Agriculture, Yangling, Shaanxi Province, China
| | - Jianmin Su
- College of Veterinary Medicine, Northwest A&F University, Key Laboratory of Animal Biotechnology of the Ministry of Agriculture, Yangling, Shaanxi Province, China
| | - Jinjing Zhang
- College of Veterinary Medicine, Northwest A&F University, Key Laboratory of Animal Biotechnology of the Ministry of Agriculture, Yangling, Shaanxi Province, China
| | - Lei Zhang
- College of Veterinary Medicine, Northwest A&F University, Key Laboratory of Animal Biotechnology of the Ministry of Agriculture, Yangling, Shaanxi Province, China
| | - Xin Liu
- College of Veterinary Medicine, Northwest A&F University, Key Laboratory of Animal Biotechnology of the Ministry of Agriculture, Yangling, Shaanxi Province, China
| | - Jingcheng Zhang
- College of Veterinary Medicine, Northwest A&F University, Key Laboratory of Animal Biotechnology of the Ministry of Agriculture, Yangling, Shaanxi Province, China
| | - Fengyu Wang
- College of Veterinary Medicine, Northwest A&F University, Key Laboratory of Animal Biotechnology of the Ministry of Agriculture, Yangling, Shaanxi Province, China
| | - Zhenzhen Lu
- College of Veterinary Medicine, Northwest A&F University, Key Laboratory of Animal Biotechnology of the Ministry of Agriculture, Yangling, Shaanxi Province, China
| | - Xupeng Xing
- College of Veterinary Medicine, Northwest A&F University, Key Laboratory of Animal Biotechnology of the Ministry of Agriculture, Yangling, Shaanxi Province, China
| | - HuanHuan Chen
- College of Veterinary Medicine, Northwest A&F University, Key Laboratory of Animal Biotechnology of the Ministry of Agriculture, Yangling, Shaanxi Province, China
| | - Yong Zhang
- College of Veterinary Medicine, Northwest A&F University, Key Laboratory of Animal Biotechnology of the Ministry of Agriculture, Yangling, Shaanxi Province, China
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10
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Harvey AJ. Mitochondria in early development: linking the microenvironment, metabolism and the epigenome. Reproduction 2020; 157:R159-R179. [PMID: 30870807 DOI: 10.1530/rep-18-0431] [Citation(s) in RCA: 88] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Accepted: 02/04/2019] [Indexed: 12/24/2022]
Abstract
Mitochondria, originally of bacterial origin, are highly dynamic organelles that have evolved a symbiotic relationship within eukaryotic cells. Mitochondria undergo dynamic, stage-specific restructuring and redistribution during oocyte maturation and preimplantation embryo development, necessary to support key developmental events. Mitochondria also fulfil a wide range of functions beyond ATP synthesis, including the production of intracellular reactive oxygen species and calcium regulation, and are active participants in the regulation of signal transduction pathways. Communication between not only mitochondria and the nucleus, but also with other organelles, is emerging as a critical function which regulates preimplantation development. Significantly, perturbations and deficits in mitochondrial function manifest not only as reduced quality and/or poor oocyte and embryo development but contribute to post-implantation failure, long-term cell function and adult disease. A growing body of evidence indicates that altered availability of metabolic co-factors modulate the activity of epigenetic modifiers, such that oocyte and embryo mitochondrial activity and dynamics have the capacity to establish long-lasting alterations to the epigenetic landscape. It is proposed that preimplantation embryo development may represent a sensitive window during which epigenetic regulation by mitochondria is likely to have significant short- and long-term effects on embryo, and offspring, health. Hence, mitochondrial integrity, communication and metabolism are critical links between the environment, the epigenome and the regulation of embryo development.
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Affiliation(s)
- Alexandra J Harvey
- School of BioSciences, University of Melbourne, Parkville, Victoria, Australia
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Yan S, Wang M, Liang X, Martyniuk CJ, Zha J, Wang Z. Environmentally relevant concentrations of carbamazepine induce liver histopathological changes and a gender-specific response in hepatic proteome of Chinese rare minnows (Gobiocypris rarus). ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2018; 243:480-491. [PMID: 30216880 DOI: 10.1016/j.envpol.2018.09.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Revised: 09/02/2018] [Accepted: 09/02/2018] [Indexed: 06/08/2023]
Abstract
To assess hepatotoxicity and to determine the underlying mechanisms of carbamazepine (CBZ) toxicity in fish, histopathology and the liver proteome were examined after Chinese rare minnow (Gobiocypris rarus) were exposed to 1, 10, and 100 μg/L CBZ for 28 days. Histopathological changes included disruption of spatial structure, pyknotic nuclei, cellular vacuolization and deformation of cell nuclei, in addition to marked swelling of hepatocytes in all treatment groups. Protein analysis revealed that there were gender-specific responses in rare minnow following exposure, and there were 47 proteins in females and 22 proteins in males identified as differentially abundant following CBZ treatments. Pathway analysis revealed that cellular processes affected by CBZ included apoptosis, cell differentiation, cell proliferation, and the respiratory chain, indicating impaired energy homeostasis. Noteworthy was that 15 proteins identified as different in abundance were associated with carcinogenicity. Relative mRNA levels for select transcripts were consistent with the changes of proteins N-myc downstream regulated gene (NDRG), Tropomyosin 2-Beta (TPM2) and annexin A4 (ANXA4). Protein pyruvate kinase, liver and RBC (PKLR) were increased at 1 and 100 μg/L CBZ without significant difference in transcript levels. These findings characterize molecular responses and histological changes in the liver that generate new insights into CBZ hepatotoxicity in Chinese rare minnow.
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Affiliation(s)
- Saihong Yan
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Miao Wang
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Xuefang Liang
- School of Ecology and Environment, Inner Mongolia University, Hohhot, 010021, China
| | - Christopher J Martyniuk
- Department of Physiological Sciences and Center for Environmental and Human Toxicology, UF Genetics Institute, College of Veterinary Medicine, University of Florida, Gainesville, FL, 32611, USA
| | - Jinmiao Zha
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Beijing Key Laboratory of Industrial Wastewater Treatment and Reuse, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.
| | - Zijian Wang
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
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12
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Mendel M, Chen KM, Homolka D, Gos P, Pandey RR, McCarthy AA, Pillai RS. Methylation of Structured RNA by the m 6A Writer METTL16 Is Essential for Mouse Embryonic Development. Mol Cell 2018; 71:986-1000.e11. [PMID: 30197299 PMCID: PMC6162343 DOI: 10.1016/j.molcel.2018.08.004] [Citation(s) in RCA: 229] [Impact Index Per Article: 38.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Revised: 06/22/2018] [Accepted: 07/30/2018] [Indexed: 12/19/2022]
Abstract
Internal modification of RNAs with N6-methyladenosine (m6A) is a highly conserved means of gene expression control. While the METTL3/METTL14 heterodimer adds this mark on thousands of transcripts in a single-stranded context, the substrate requirements and physiological roles of the second m6A writer METTL16 remain unknown. Here we describe the crystal structure of human METTL16 to reveal a methyltransferase domain furnished with an extra N-terminal module, which together form a deep-cut groove that is essential for RNA binding. When presented with a random pool of RNAs, METTL16 selects for methylation-structured RNAs where the critical adenosine is present in a bulge. Mouse 16-cell embryos lacking Mettl16 display reduced mRNA levels of its methylation target, the SAM synthetase Mat2a. The consequence is massive transcriptome dysregulation in ∼64-cell blastocysts that are unfit for further development. This highlights the role of an m6A RNA methyltransferase in facilitating early development via regulation of SAM availability. Structure of the METTL16 m6A writer domain with a unique N-terminal module N-terminal module of METTL16 is essential for charge-based binding to RNA METTL16 preferentially methylates adenosines within structured RNAs Regulation of Mat2a mRNA by Mettl16 is essential for mouse embryonic development
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Affiliation(s)
- Mateusz Mendel
- Department of Molecular Biology, Science III, University of Geneva, 30 Quai Ernest-Ansermet, CH-1211 Geneva 4, Switzerland
| | - Kuan-Ming Chen
- Department of Molecular Biology, Science III, University of Geneva, 30 Quai Ernest-Ansermet, CH-1211 Geneva 4, Switzerland
| | - David Homolka
- Department of Molecular Biology, Science III, University of Geneva, 30 Quai Ernest-Ansermet, CH-1211 Geneva 4, Switzerland
| | - Pascal Gos
- Department of Molecular Biology, Science III, University of Geneva, 30 Quai Ernest-Ansermet, CH-1211 Geneva 4, Switzerland
| | - Radha Raman Pandey
- Department of Molecular Biology, Science III, University of Geneva, 30 Quai Ernest-Ansermet, CH-1211 Geneva 4, Switzerland
| | - Andrew A McCarthy
- European Molecular Biology Laboratory, Grenoble Outstation, 71 Avenue des Martyrs, 38042 Grenoble, France
| | - Ramesh S Pillai
- Department of Molecular Biology, Science III, University of Geneva, 30 Quai Ernest-Ansermet, CH-1211 Geneva 4, Switzerland.
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13
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Suyatno, Kitamura Y, Ikeda S, Minami N, Yamada M, Imai H. Long-term culture of undifferentiated spermatogonia isolated from immature and adult bovine testes. Mol Reprod Dev 2018; 85:236-249. [DOI: 10.1002/mrd.22958] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2017] [Revised: 01/08/2018] [Accepted: 01/11/2018] [Indexed: 12/22/2022]
Affiliation(s)
- Suyatno
- Laboratory of Reproductive Biology; Graduate School of Agriculture; Kyoto University; Kyoto Japan
- Indonesian Agency for Agricultural Research and Development; Pasar Minggu Jakarta Selatan Indonesia
| | - Yuka Kitamura
- Laboratory of Reproductive Biology; Graduate School of Agriculture; Kyoto University; Kyoto Japan
| | - Shuntaro Ikeda
- Laboratory of Animal Physiology and Functional Anatomy; Graduate School of Agriculture; Kyoto University; Kyoto Japan
| | - Naojiro Minami
- Laboratory of Reproductive Biology; Graduate School of Agriculture; Kyoto University; Kyoto Japan
| | - Masayasu Yamada
- Laboratory of Reproductive Biology; Graduate School of Agriculture; Kyoto University; Kyoto Japan
| | - Hiroshi Imai
- Laboratory of Reproductive Biology; Graduate School of Agriculture; Kyoto University; Kyoto Japan
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14
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Ikeda S, Sugimoto M, Kume S. Lipofection of siRNA into bovine 8-16-cell stage embryos using zona removal and the well-of-the-well culture system. J Reprod Dev 2018; 64:199-202. [PMID: 29353869 PMCID: PMC5902909 DOI: 10.1262/jrd.2017-137] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Bovine preimplantation embryos exhibit dramatic biological changes between before and after the 8-16-cell stage. Here we report a simple lipofection method to transfect siRNA into bovine
8-16-cell stage embryos using zona removal and the well-of-the-well (WOW) culture system. Bovine one-cell embryos produced in vitro were freed from the zona pellucida and
cultured up to the 8-16-cell stage in WOW dishes. The 8-16-cell embryos were lipofected with siRNA and the transfection efficiency was assessed at 48 h of transfection. Lipofection with a
red fluorescent non-targeting siRNA revealed the importance of zona removal for transfection of siRNA into embryos. Using this method, we knocked down the methionine adenosyltransferase 2A
(MAT2A) gene, achieving a significant reduction in MAT2A expression (P < 0.05) concomitant with the marked inhibition of blastocyst development. Our
proposed method, tentatively named ‘Octo-lipofection’, may be useful to analyze gene functions in bovine preimplantation embryos without expensive equipment and skill-intensive
techniques.
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Affiliation(s)
- Shuntaro Ikeda
- Laboratory of Animal Physiology and Functional Anatomy, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan
| | - Miki Sugimoto
- Laboratory of Animal Physiology and Functional Anatomy, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan
| | - Shinichi Kume
- Laboratory of Animal Physiology and Functional Anatomy, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan
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