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Wu F, Wu Q, Li D, Zhang Y, Wang R, Liu Y, Li W. Oct4 regulates DNA methyltransferase 1 transcription by direct binding of the regulatory element. Cell Mol Biol Lett 2018; 23:39. [PMID: 30140294 PMCID: PMC6097287 DOI: 10.1186/s11658-018-0104-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Accepted: 08/01/2018] [Indexed: 12/23/2022] Open
Abstract
Background The transcription factor Oct4 plays a pivotal role in the pre-implantation development of the mouse embryo. DNA methyltransferase 1 (Dnmt1) maintains the changes in DNA methylation during mammalian early embryonic development. Little is known of the role of Oct4 in DNA methylation in mice. In this study, Kunming white mice were used as an animal model to reveal any correlation between DNA methylation and Oct4 during mammalian embryonic development. Results The expressions of Dnmt1 and Oct4 were initially studied using real-time PCR. They exhibited different patterns during the pre-implantation stage. Moreover, by using a promoter assay and ChIP analysis, we found that the transcriptional activities of Dnmt1 in mouse NIH/3 T3 cells and CCE cells were regulated by Oct4 through direct binding to the - 554 to - 294 fragment of the upstream regulation element of Dnmt1. The downregulation of Dnmt1 expression and enzyme activity by mouse Oct4 were further confirmed by transfecting Oct4 siRNA into mouse CCE cells. Conclusion Our results indicate that Oct4 is involved in DNA methylation through the regulation of Dnmt1 transcription, especially during the early stages of mouse pre-implantation embryo development.
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Affiliation(s)
- Fengrui Wu
- 1Anhui Province Key Laboratory of Embryo Development and Reproductive Regulation, Fuyang Normal University, Fuyang, China.,2Anhui Province Key Laboratory of Environmental Hormone and Reproduction, Fuyang Normal University, Fuyang, China
| | - Qingqing Wu
- 1Anhui Province Key Laboratory of Embryo Development and Reproductive Regulation, Fuyang Normal University, Fuyang, China.,2Anhui Province Key Laboratory of Environmental Hormone and Reproduction, Fuyang Normal University, Fuyang, China
| | - Dengkun Li
- 1Anhui Province Key Laboratory of Embryo Development and Reproductive Regulation, Fuyang Normal University, Fuyang, China.,2Anhui Province Key Laboratory of Environmental Hormone and Reproduction, Fuyang Normal University, Fuyang, China
| | - Yuan Zhang
- 1Anhui Province Key Laboratory of Embryo Development and Reproductive Regulation, Fuyang Normal University, Fuyang, China.,2Anhui Province Key Laboratory of Environmental Hormone and Reproduction, Fuyang Normal University, Fuyang, China
| | - Rong Wang
- 1Anhui Province Key Laboratory of Embryo Development and Reproductive Regulation, Fuyang Normal University, Fuyang, China.,2Anhui Province Key Laboratory of Environmental Hormone and Reproduction, Fuyang Normal University, Fuyang, China
| | - Yong Liu
- 1Anhui Province Key Laboratory of Embryo Development and Reproductive Regulation, Fuyang Normal University, Fuyang, China.,2Anhui Province Key Laboratory of Environmental Hormone and Reproduction, Fuyang Normal University, Fuyang, China
| | - Wenyong Li
- 1Anhui Province Key Laboratory of Embryo Development and Reproductive Regulation, Fuyang Normal University, Fuyang, China.,2Anhui Province Key Laboratory of Environmental Hormone and Reproduction, Fuyang Normal University, Fuyang, China
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Wu FR, Li DK, Su MM, Liu Y, Ding B, Wang R, Li WY. Oral administration of Schisandra chinensis extract suppresses Dnmt1 expression in Kunming mice ovaries. Genes Genomics 2016. [DOI: 10.1007/s13258-016-0399-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Yang Y, Wang J, Zhao C, Chen X, Chen L, Zhang J, Huo R, Liu C, Tong H, Ling X. The interferon α-responsive gene, Ifrg15, plays vital roles during mouse early embryonic development. Cell Mol Life Sci 2016; 73:2969-84. [PMID: 26911731 PMCID: PMC11108498 DOI: 10.1007/s00018-016-2150-0] [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: 09/22/2015] [Revised: 01/09/2016] [Accepted: 01/26/2016] [Indexed: 10/22/2022]
Abstract
The interferon alpha-responsive gene (Ifrg15) mRNA is highly expressed in various stages during preimplantation mammalian embryo development. Unfortunately, few studies have investigated the effect of Ifrg15 in this process. In mammals, the fusion of male and female pronuclei generates a diploid zygote, and is an important step for subsequent cleavage and blastocyst formation. Here, by using RNA interference, rescue experiments, immunofluorescence staining and live cell observations, we found that preimplantation embryo development was arrested at the 1-cell stage after knocking down Ifrg15 expression. This induced DNA damage and prevented the cleavage of embryos. Furthermore, the effect of Ifrg15 deficiency in arresting preimplantation embryo development produced by specific short interfering RNA microinjection was concentration-dependent. Using transcriptome expression profiles, gene ontogeny functional annotation and enrichment analysis, we gained 197 enriched pathways based on 1445 differentially expressed genes (DEGs). Of these, 12 pathways and about one third of the DEGs were involved in DNA damage, DNA repair, cell cycle, and developmental processes. Thus, the IFRG15 protein might be an important molecule for maintaining genomic integrity and stability through upregulating or downregulating a cascade of genes to permit normal preimplantation embryo development.
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Affiliation(s)
- Ye Yang
- State Key Laboratory of Reproductive Medicine, Department of Reproduction, Nanjing Maternity and Child Health Care Hospital Affiliated to Nanjing Medical University, Nanjing Medical University, Nanjing, 210004, Jiangsu, China
| | - Jiayi Wang
- State Key Laboratory of Reproductive Medicine, Department of Reproduction, Nanjing Maternity and Child Health Care Hospital Affiliated to Nanjing Medical University, Nanjing Medical University, Nanjing, 210004, Jiangsu, China
| | - Chun Zhao
- State Key Laboratory of Reproductive Medicine, Department of Reproduction, Nanjing Maternity and Child Health Care Hospital Affiliated to Nanjing Medical University, Nanjing Medical University, Nanjing, 210004, Jiangsu, China
| | - Xiaojiao Chen
- State Key Laboratory of Reproductive Medicine, Department of Reproduction, Nanjing Maternity and Child Health Care Hospital Affiliated to Nanjing Medical University, Nanjing Medical University, Nanjing, 210004, Jiangsu, China
| | - Li Chen
- Department of Reproduction, Changzhou Maternity and Child Health Care Hospital Affiliated to Nanjing Medical University, Nanjing Medical University, Changzhou, 213003, Jiangsu, China
| | - Junqiang Zhang
- State Key Laboratory of Reproductive Medicine, Department of Reproduction, Nanjing Maternity and Child Health Care Hospital Affiliated to Nanjing Medical University, Nanjing Medical University, Nanjing, 210004, Jiangsu, China
| | - Ran Huo
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, Nanjing Medical University, Nanjing, 210004, Jiangsu, China
| | - Chang Liu
- Jiangsu Key Laboratory for Molecular and Medical Biotechnology and College of Life Sciences, Nanjing Normal University, Nanjing, Jiangsu, China
| | - Hua Tong
- State Key Laboratory of Reproductive Medicine, Department of Reproduction, Nanjing Maternity and Child Health Care Hospital Affiliated to Nanjing Medical University, Nanjing Medical University, Nanjing, 210004, Jiangsu, China.
| | - Xiufeng Ling
- State Key Laboratory of Reproductive Medicine, Department of Reproduction, Nanjing Maternity and Child Health Care Hospital Affiliated to Nanjing Medical University, Nanjing Medical University, Nanjing, 210004, Jiangsu, China.
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de Souza da Fonseca A, Mencalha AL, Araújo de Campos VM, Ferreira Machado SC, de Freitas Peregrino AA, Geller M, de Paoli F. DNA repair gene expression in biological tissues exposed to low-intensity infrared laser. Lasers Med Sci 2012; 28:1077-84. [PMID: 22941447 DOI: 10.1007/s10103-012-1191-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2012] [Accepted: 08/20/2012] [Indexed: 12/21/2022]
Abstract
Special properties of laser light have led to its usefulness in many applications in therapy. Excitation of endogenous chromophores in biotissues and generation of free radicals could be involved in its biological effects. DNA lesions induced by free radicals are repaired by base excision repair pathway. In this work, we evaluated the expression of APE1 and OGG1 genes related to repair of DNA lesions induced by free radicals. Skin and muscle tissues of Wistar rats were exposed to low-intensity infrared laser at different fluences and frequencies. After laser exposition of 1 and 24 h, tissue samples were withdrawn for total RNA extraction, cDNA synthesis, and evaluation of APE1 and OGG1 gene expression by quantitative polymerase chain reaction. Data obtained show that laser radiation alters the expression of APE1 and OGG1 mRNA differently in skin and muscle tissues of Wistar rats depending of the fluence, frequency, and time after exposure. Our study suggests that low-intensity infrared laser affects expression of genes involved in repair of DNA lesions by base excision repair pathway.
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Affiliation(s)
- Adenilson de Souza da Fonseca
- Departamento de Biofísica e Biometria, Instituto de Biologia Roberto Alcantara Gomes, Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier, 524, Maracanã, Rio de Janeiro 20550900, Brazil.
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