1
|
Zhang C, Nie Y, Xu B, Mu C, Tian GG, Li X, Cheng W, Zhang A, Li D, Wu J. Luteinizing Hormone Receptor Mutation (LHR N316S) Causes Abnormal Follicular Development Revealed by Follicle Single-Cell Analysis and CRISPR/Cas9. Interdiscip Sci 2024:10.1007/s12539-024-00646-7. [PMID: 39150470 DOI: 10.1007/s12539-024-00646-7] [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: 12/24/2023] [Revised: 07/17/2024] [Accepted: 07/22/2024] [Indexed: 08/17/2024]
Abstract
Abnormal interaction between granulosa cells and oocytes causes disordered development of ovarian follicles. However, the interactions between oocytes and cumulus granulosa cells (CGs), oocytes and mural granulosa cells (MGs), and CGs and MGs remain to be fully explored. Using single-cell RNA-sequencing (scRNA-seq), we determined the transcriptional profiles of oocytes, CGs and MGs in antral follicles. Analysis of scRNA-seq data revealed that CGs may regulate follicular development through the BMP15-KITL-KIT-PI3K-ARF6 pathway with elevated expression of luteinizing hormone receptor (LHR). Because internalization of the LHR is regulated by Arf6, we constructed LHRN316S mice by CRISPR/Cas9 to further explore mechanisms of follicular development and novel treatment strategies for female infertility. Ovaries of LHRN316S mice exhibited reduced numbers of corpora lutea and ovulation. The LHRN316S mice had a reduced rate of oocyte maturation in vitro and decreased serum progesterone levels. Mating LHRN316S female mice with ICR wild type male mice revealed that the infertility rate of LHRN316S mice was 21.4% (3/14). Litter sizes from LHRN316S mice were smaller than those from control wild type female mice. The oocytes from LHRN316S mice had an increased rate of maturation in vitro after progesterone administration in vitro. Furthermore, progesterone treated LHRN316S mice produced offspring numbers per litter equivalent to WT mice. These findings provide key insights into cellular interactions in ovarian follicles and provide important clues for infertility treatment.
Collapse
Affiliation(s)
- Chen Zhang
- Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Bio-X Institutes, Shanghai Jiao Tong University, Shanghai, 200240, China
- Department of Hematology, Tangdu Hospital, Xi'an, 710032, China
| | - Yongqiang Nie
- Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Bio-X Institutes, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Bufang Xu
- Department of Obstetrics and Gynecology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Chunlan Mu
- School of Basic Medical Sciences, Key Laboratory of Fertility Preservation and Maintenance of Ministry of Education, Ningxia Medical University, Yinchuan, 750004, China
| | - Geng G Tian
- Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Bio-X Institutes, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Xiaoyong Li
- Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Bio-X Institutes, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Weiwei Cheng
- International Peace Maternity and Child Health Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200030, China.
| | - Aijun Zhang
- Department of Obstetrics and Gynecology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China.
| | - Dali Li
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai, 200241, China.
| | - Ji Wu
- Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Bio-X Institutes, Shanghai Jiao Tong University, Shanghai, 200240, China.
- School of Basic Medical Sciences, Key Laboratory of Fertility Preservation and Maintenance of Ministry of Education, Ningxia Medical University, Yinchuan, 750004, China.
| |
Collapse
|
2
|
Chouchene L, Boughammoura S, Ben Rhouma M, Mlouka R, Banni M, Messaoudi I, Kessabi K. Effect of thyroid disruption on ovarian development following maternal exposure to Bisphenol S. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:52596-52614. [PMID: 39153066 DOI: 10.1007/s11356-024-34666-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2024] [Accepted: 08/05/2024] [Indexed: 08/19/2024]
Abstract
Thyroid hormones play a crucial role in numerous physiological processes, including reproduction. Bisphenol S (BPS) is a structural analog of Bisphenol A known for its toxic effects. Interference of this substitute with normal thyroid function has been described. To investigate the effect of thyroid disruption on ovarian development following maternal exposure to BPS, female rats were exposed, daily, to either AT 1-850 (a thyroid hormone receptor antagonist) (10 nmol/rat) or BPS (0.2 mg/kg) during gestation and lactation. The effects on reproductive outcome, offspring development, histological structures, hormone levels, oxidative status, cytoskeleton proteins expression, and oocyte development gene expression were examined. Our results are in favor of offspring ovarian development disruption due to thyroid disturbance in adult pregnant females. During both fetal and postnatal stages, BPS considerably altered the histological structure of the thyroid tissue as well as oocyte and follicular development, which led to premature ovarian failure and stimulation of oocyte atresia, being accompanied with oxidative stress, hypothalamic-pituitary-ovarian axis disorders, and cytoskeletal dynamic disturbance. Crucially, our study underscores that BPS may induce reproductive toxicity by blocking nuclear thyroid hormone receptors, evidenced by the parallelism and the perfect meshing between the data obtained following exposure to AT 1-850 and those after the treatment by this substitute.
Collapse
Affiliation(s)
- Lina Chouchene
- Laboratory of Genetics, Biodiversity and Bio-Resources Valorization, Higher Institute of Biotechnology of Monastir, University of Monastir, Monastir, Tunisia.
| | - Sana Boughammoura
- Laboratory of Genetics, Biodiversity and Bio-Resources Valorization, Higher Institute of Biotechnology of Monastir, University of Monastir, Monastir, Tunisia
| | - Mariem Ben Rhouma
- Laboratory of Genetics, Biodiversity and Bio-Resources Valorization, Higher Institute of Biotechnology of Monastir, University of Monastir, Monastir, Tunisia
| | - Rania Mlouka
- Laboratory of Agrobiodiversity and Ecotoxicology, Higher Institute of Agronomy, University of Sousse, Sousse, Tunisia
| | - Mohamed Banni
- Laboratory of Agrobiodiversity and Ecotoxicology, Higher Institute of Agronomy, University of Sousse, Sousse, Tunisia
| | - Imed Messaoudi
- Laboratory of Genetics, Biodiversity and Bio-Resources Valorization, Higher Institute of Biotechnology of Monastir, University of Monastir, Monastir, Tunisia
| | - Kaouthar Kessabi
- Laboratory of Genetics, Biodiversity and Bio-Resources Valorization, Higher Institute of Biotechnology of Monastir, University of Monastir, Monastir, Tunisia
| |
Collapse
|
3
|
Li H, Yuan Y, Dong H, Wang T, Zhang D, Zhou L, Chen L, He X. Foxo3a-Mediated DNMT3B Impedes Cervical Cancer Cell Proliferation and Migration Capacities through Suppressing PTEN Promoter Methylation. J INVEST SURG 2023; 36:2162170. [PMID: 36653180 DOI: 10.1080/08941939.2022.2162170] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
OBJECTIVE Cervical cancer is linked with the constitutive activation of growth factors and gene mutations-induced pro-survival signaling pathways. Herein, we purposed to explore the possible molecular mechanism of Foxo3a-mediated DNMT3B in the proliferation and migration of cervical cancer cells via mediating the PTEN promoter methylation. METHODS Foxo3a expression in cervical cancer was tested by qRT-PCR and western blot experiments. The cervical cancer cell biological functions with overexpression of Foxo3a were evaluated by CCK-8 assay, Transwell experiment, and flow cytometry, respectively. MS-PCR was utilized for testing the PTEN methylation levels, and ChIP experiment was implemented for evaluating the enrichment of DNMT3B in the PTEN promoter region and the binding of Foxo3a and DNMT3B. The PTEN methylation and interference with Foxo3a expression were performed in cervical cancer cells, and then their impacts on cervical cancer cell biological functions were observed. RESULTS FOXO3a was expressed at a low level in cervical cancer, and its overexpression contributed to a reduction in cell proliferative, migratory and invasive capabilities, and an elevation in apoptosis rate. Foxo3a blocked its methylation with the PTEN promoter by repressing DNMT3B activity. Upon treatment with methyltransferase inhibitor (5-aza-dc), the malignant phenotypes of cervical cancer cells were diminished. 5-aza-dc neutralized the impacts of silencing Foxo3a on malignant phenotypes. CONCLUSION This research underlines that Foxo3a blocks its methylation with the PTEN promoter by inhibiting DNMT3B activity, which subsequently impedes cervical cancer cell progression.
Collapse
Affiliation(s)
- Hongying Li
- Department of Gynecology, Maternal and Child Health Hospital of Hubei Province, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, P.R. China
| | - Yuqin Yuan
- Department of Gynecology, Medical College of Wuhan University of Science and Technology, Wuhan, Hubei, P.R. China
| | - Hong Dong
- Department of Gynecology, Maternal and Child Health Hospital of Hubei Province, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, P.R. China
| | - Tinghui Wang
- Department of Gynecology, Medical College of Wuhan University of Science and Technology, Wuhan, Hubei, P.R. China
| | - Dunlan Zhang
- Department of Gynecology, Maternal and Child Health Hospital of Hubei Province, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, P.R. China
| | - Limin Zhou
- Department of Gynecology, Maternal and Child Health Hospital of Hubei Province, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, P.R. China
| | - Lu Chen
- Department of Gynecology, Maternal and Child Health Hospital of Hubei Province, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, P.R. China
| | - Xueyan He
- Department of Gynecology, Medical College of Wuhan University of Science and Technology, Wuhan, Hubei, P.R. China
| |
Collapse
|
4
|
Klutstein M, Gonen N. Epigenetic aging of mammalian gametes. Mol Reprod Dev 2023; 90:785-803. [PMID: 37997675 DOI: 10.1002/mrd.23717] [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: 12/18/2022] [Revised: 11/09/2023] [Accepted: 11/12/2023] [Indexed: 11/25/2023]
Abstract
The process of aging refers to physiological changes that occur to an organism as time progresses and involves changes to DNA, proteins, metabolism, cells, and organs. Like the rest of the cells in the body, gametes age, and it is well established that there is a decline in reproductive capabilities in females and males with aging. One of the major pathways known to be involved in aging is epigenetic changes. The epigenome is the multitude of chemical modifications performed on DNA and chromatin that affect the ability of chromatin to be transcribed. In this review, we explore the effects of aging on female and male gametes with a focus on the epigenetic changes that occur in gametes throughout aging. Quality decline in oocytes occurs at a relatively early age. Epigenetic changes constitute an important part of oocyte aging. DNA methylation is reduced with age, along with reduced expression of DNA methyltransferases (DNMTs). Histone deacetylases (HDAC) expression is also reduced, and a loss of heterochromatin marks occurs with age. As a consequence of heterochromatin loss, retrotransposon expression is elevated, and aged oocytes suffer from DNA damage. In sperm, aging affects sperm number, motility and fecundity, and epigenetic changes may constitute a part of this process. 5 methyl-cytosine (5mC) methylation is elevated in sperm from aged men, but methylation on Long interspersed nuclear elements (LINE) elements is reduced. Di and trimethylation of histone 3 lysine 9 (H3K9me2/3) is reduced in sperm from aged men and trimethylation of histone 3 lysine 27 (H3K27me3) is elevated. The protamine makeup of sperm from aged men is also changed, with reduced protamine expression and a misbalanced ratio between protamine proteins protamine P1 and protamine P2. The study of epigenetic reproductive aging is recently gaining interest. The current status of the field suggests that many aspects of gamete epigenetic aging are still open for investigation. The clinical applications of these investigations have far-reaching consequences for fertility and sociological human behavior.
Collapse
Affiliation(s)
- Michael Klutstein
- Institute of Biomedical and Oral Research, Faculty of Dental Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Nitzan Gonen
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat Gan, Israel
- Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat Gan, Israel
| |
Collapse
|
5
|
Zhou S, Zeng H, Huang J, Lei L, Tong X, Li S, Zhou Y, Guo H, Khan M, Luo L, Xiao R, Chen J, Zeng Q. Epigenetic regulation of melanogenesis. Ageing Res Rev 2021; 69:101349. [PMID: 33984527 DOI: 10.1016/j.arr.2021.101349] [Citation(s) in RCA: 58] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2020] [Revised: 04/19/2021] [Accepted: 04/26/2021] [Indexed: 02/07/2023]
Abstract
Melanogenesis is a complex process in which melanin is synthesized in melanocytes and transported to keratinocytes, which involves multiple genes and signaling pathways. Epigenetics refers to the potential genetic changes that affect gene expression without involving changes in the original sequence of DNA nucleotides. DNA methylation regulates the expression of key genes such as tyrosinase (TYR), tyrosinase-related protein 1 (TYRP1), dopachrome tautomerase (DCT) and microphthalmia-associated transcription factor (MITF), as well as paracrine factors such as stem cell factor (SCF) and endothelin-1 (ET-1) in melanogenesis. Potential DNA methylation sites are present in the genes of melanogenesis-related signaling pathways such as "Wnt", "PI3K/Akt/CREB" and "MAPK". H3K27 acetylation is abundant in melanogenesis-related genes. Both the upstream activation and downstream regulation of MITF depend on histone acetyltransferase CBP/p300, and pH-induced H3K27 acetylation may be the amplifying mechanism of MITF's effect. HDAC1 and HDAC10 catalyze histone deacetylation of melanogenesis-related gene promoters. Chromatin remodelers SWI/SNF complex and ISWI complex use the energy of ATP hydrolysis to rearrange nucleosomes, while their active subunits BRG1, BRM and BPTF, act as activators and cofactors of MITF. MicroRNAs (miRNAs) can directly target a large number of melanogenesis-related genes, while long noncoding RNAs (lncRNAs) and circular RNAs (circRNAs) regulate melanogenesis in a variety of ways. Interactions exist among the epigenetic mechanisms of melanogenesis. For example, the methyl CpG binding domain protein 2 (MeCP2) links DNA methylation, histone deacetylation, and histone methylation. Epigenetic-based therapy provides novel opportunities for treating dermatoses that are caused by pigmentation disturbances. This review summarizes the epigenetic regulation mechanisms of melanogenesis, and examines the pathogenesis and treatment of epigenetics in pigmentation disorders.
Collapse
|
6
|
Wang JJ, Ge W, Liu JC, Klinger FG, Dyce PW, De Felici M, Shen W. Complete in vitro oogenesis: retrospects and prospects. Cell Death Differ 2017; 24:1845-1852. [PMID: 28841213 PMCID: PMC5635224 DOI: 10.1038/cdd.2017.134] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Revised: 06/13/2017] [Accepted: 07/20/2017] [Indexed: 11/22/2022] Open
Abstract
Precise control of mammalian oogenesis has been a traditional focus of reproductive and developmental biology research. Recently, new reports have introduced the possibility of obtaining functional gametes derived in vitro from stem cells. The potential to produce functional gametes from stem cells has exciting applications for regenerative medicine though still remains challenging. In mammalian females ovulation and fertilization is a privilege reserved for a small number of oocytes. In reality the vast majority of oocytes formed from primordial germ cells (PGCs) will undergo apoptosis, or other forms of cell death. Removal occurs during germ cell cyst breakdown and the establishment of the primordial follicle (PF) pool, during the long dormancy at the PF stage, or through follicular atresia prior to reaching the ovulatory stage. A way to solve this limitation could be to produce large numbers of oocytes, in vitro, from stem cells. However, to recapitulate mammalian oogenesis and produce fertilizable oocytes in vitro is a complex process involving several different cell types, precise follicular cell-oocyte reciprocal interactions, a variety of nutrients and combinations of cytokines, and precise growth factors and hormones depending on the developmental stage. In 2016, two papers published by Morohaku et al. and Hikabe et al. reported in vitro procedures that appear to reproduce efficiently these conditions allowing for the production, completely in a dish, of a relatively large number of oocytes that are fertilizable and capable of giving rise to viable offspring in the mouse. The present article offers a critical overview of these results as well as other previous work performed mainly in mouse attempting to reproduce oogenesis completely in vitro and considers some perspectives for the potential to adapt the methods to produce functional human oocytes.
Collapse
Affiliation(s)
- Jun-Jie Wang
- Institute of Reproductive Sciences, College of Life Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Wei Ge
- Institute of Reproductive Sciences, College of Life Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Jing-Cai Liu
- Institute of Reproductive Sciences, College of Life Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Francesca Gioia Klinger
- Department of Biomedicine and Prevention, University of Rome ‘Tor Vergata’, Rome 00133, Italy
| | - Paul W Dyce
- Department of Animal Sciences, Auburn University, Auburn, AL 36849, USA
| | - Massimo De Felici
- Department of Biomedicine and Prevention, University of Rome ‘Tor Vergata’, Rome 00133, Italy
| | - Wei Shen
- Institute of Reproductive Sciences, College of Life Sciences, Qingdao Agricultural University, Qingdao 266109, China
| |
Collapse
|
7
|
Ramsawhook AH, Lewis LC, Eleftheriou M, Abakir A, Durczak P, Markus R, Rajani S, Hannan NRF, Coyle B, Ruzov A. Immunostaining for DNA Modifications: Computational Analysis of Confocal Images. J Vis Exp 2017:56318. [PMID: 28930980 PMCID: PMC5752195 DOI: 10.3791/56318] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
For several decades, 5-methylcytosine (5mC) has been thought to be the only DNA modification with a functional significance in metazoans. The discovery of enzymatic oxidation of 5mC to 5-hydroxymethylcytosine (5hmC), 5-formylcytosine (5fC) and 5-carboxylcytosine (5caC) as well as detection of N6-methyladenine (6mA) in the DNA of multicellular organisms provided additional degrees of complexity to the epigenetic research. According to a growing body of experimental evidence, these novel DNA modifications may play specific roles in different cellular and developmental processes. Importantly, as some of these marks (e. g. 5hmC, 5fC and 5caC) exhibit tissue- and developmental stage-specific occurrence in vertebrates, immunochemistry represents an important tool allowing assessment of spatial distribution of DNA modifications in different biological contexts. Here the methods for computational analysis of DNA modifications visualized by immunostaining followed by confocal microscopy are described. Specifically, the generation of 2.5 dimension (2.5D) signal intensity plots, signal intensity profiles, quantification of staining intensity in multiple cells and determination of signal colocalization coefficients are shown. Collectively, these techniques may be operational in evaluating the levels and localization of these DNA modifications in the nucleus, contributing to elucidating their biological roles in metazoans.
Collapse
Affiliation(s)
- Ashley H Ramsawhook
- Division of Cancer and Stem Cells, School of Medicine, Centre for Biomolecular Sciences, University of Nottingham
| | - Lara C Lewis
- Division of Cancer and Stem Cells, School of Medicine, Centre for Biomolecular Sciences, University of Nottingham
| | - Maria Eleftheriou
- Division of Cancer and Stem Cells, School of Medicine, Centre for Biomolecular Sciences, University of Nottingham
| | - Abdulkadir Abakir
- Division of Cancer and Stem Cells, School of Medicine, Centre for Biomolecular Sciences, University of Nottingham
| | - Paulina Durczak
- Division of Cancer and Stem Cells, School of Medicine, Centre for Biomolecular Sciences, University of Nottingham
| | - Robert Markus
- School of Life Sciences Imaging (SLIM), School of Life Sciences, University of Nottingham
| | - Seema Rajani
- School of Life Sciences Imaging (SLIM), School of Life Sciences, University of Nottingham
| | - Nicholas R F Hannan
- Division of Cancer and Stem Cells, School of Medicine, Centre for Biomolecular Sciences, University of Nottingham
| | - Beth Coyle
- Children's Brain Tumour Research Centre, School of Medicine, QMC, University of Nottingham
| | - Alexey Ruzov
- Division of Cancer and Stem Cells, School of Medicine, Centre for Biomolecular Sciences, University of Nottingham;
| |
Collapse
|
8
|
Zhang W, Wu T, Zhang C, Luo L, Xie M, Huang H. Cadmium exposure in newborn rats ovary induces developmental disorders of primordial follicles and the differential expression of SCF/c-kit gene. Toxicol Lett 2017; 280:20-28. [PMID: 28801138 DOI: 10.1016/j.toxlet.2017.08.004] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Revised: 08/01/2017] [Accepted: 08/06/2017] [Indexed: 10/19/2022]
Abstract
Since the 1990s, the rising problem that gonad reproductive toxicity on adult female after exposing to cadmium (Cd), an environmental endocrine disruptor, has attracted high attention at home and abroad,and was systematically studied. Our research focuses on a further problem is that early cadmium exposure (during birth to before puberty) impact on development and function of ovarian cells and its possible mechanism. Our research focuses on the changes of ovarian cells growth and development after the newborn rat ovaries with cadmium exposure in vitro, and different expression of ovarian cells development-related factors, SCF/c-kit and changes of their DNA methylation status. We obtained ovaries from 4-day-old SD rats and cultured them in DMEM/F12 mixed with α-MEM media in vitro. Different doses of cadmium were designed as control, 0.5, 5, 10 and 50μM, and then the constituent ratio of ovarian follicle and follicular oocytes diameter were observed with microscope after 4-h exposure. We found that the increased constituent ratio of original follicle and decreased diameter of all levels of follicular oocytes(compared with control, with statistically significant differences, P<0.01).After the measurement of expression of SCF/c-kit by qRT-PCR and Western Blotting, the mRNA and protein expression of SCF/c-kit in ovarian were both decreased. We further found that the increased constituent ratio of growth follicle and increased diameter of oocytes under the treatment of adding SCF in cell culture media. Finally, MALDI-TOF-MS method showed DNA-low methylation status of SCF/c-kit promoter region after Cd exposure. Overall, we concluded that the exposure of cadimium (5-50μM) on newborn rats ovaries could inhibit follicle development.SCF/c-kit system might mediate follicle development damage caused by cadmium, which is associated with DNA hypomethylation of SCF/c-kit promoter region may be worthy of further study.
Collapse
Affiliation(s)
- Wenchang Zhang
- Fujian Provincial Key Laboratory of Environment factors and Cancer, Key Laboratory of Environment and Health, School of Public Health, Fujian Medical University, Xueyuan Road No.1, Minhou County, Fuzhou 350108 China.
| | - Tingting Wu
- Fujian Center for Disease Control and Prevention, No.76 Jintai Road, Fuzhou, Fujian, 350001, China
| | - Chenyun Zhang
- Fujian Provincial Key Laboratory of Environment factors and Cancer, Key Laboratory of Environment and Health, School of Public Health, Fujian Medical University, Xueyuan Road No.1, Minhou County, Fuzhou 350108 China
| | - Lingfeng Luo
- Fujian Provincial Key Laboratory of Environment factors and Cancer, Key Laboratory of Environment and Health, School of Public Health, Fujian Medical University, Xueyuan Road No.1, Minhou County, Fuzhou 350108 China
| | - Meimei Xie
- Fujian Center for Disease Control and Prevention, No.76 Jintai Road, Fuzhou, Fujian, 350001, China
| | - Huiling Huang
- Union Hospital of Fujian Medical University, No.29 Xinquan Road, Fuzhou, Fujian, 350001, China.
| |
Collapse
|
9
|
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.
Collapse
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
| |
Collapse
|
10
|
Ge W, Chen C, De Felici M, Shen W. In vitro differentiation of germ cells from stem cells: a comparison between primordial germ cells and in vitro derived primordial germ cell-like cells. Cell Death Dis 2015; 6:e1906. [PMID: 26469955 PMCID: PMC4632295 DOI: 10.1038/cddis.2015.265] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Revised: 08/01/2015] [Accepted: 08/04/2015] [Indexed: 01/15/2023]
Abstract
Stem cells are unique cell types capable to proliferate, some of them indefinitely, while maintaining the ability to differentiate into a few or any cell lineages. In 2003, a group headed by Hans R. Schöler reported that oocyte-like cells could be produced from mouse embryonic stem (ES) cells in vitro. After more than 10 years, where have these researches reached? Which are the major successes achieved and the problems still remaining to be solved? Although during the last years, many reviews have been published about these topics, in the present work, we will focus on an aspect that has been little considered so far, namely a strict comparison between the in vitro and in vivo developmental capabilities of the primordial germ cells (PGCs) isolated from the embryo and the PGC-like cells (PGC-LCs) produced in vitro from different types of stem cells in the mouse, the species in which most investigation has been carried out. Actually, the formation and differentiation of PGCs are crucial for both male and female gametogenesis, and the faithful production of PGCs in vitro represents the basis for obtaining functional germ cells.
Collapse
Affiliation(s)
- W Ge
- Institute of Reproductive Sciences, Qingdao Agricultural University, Qingdao 266109, China
- Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, College of Animal Science and Technology, Qingdao Agricultural University, Qingdao 266109, China
| | - C Chen
- Institute of Reproductive Sciences, Qingdao Agricultural University, Qingdao 266109, China
- Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, College of Animal Science and Technology, Qingdao Agricultural University, Qingdao 266109, China
| | - M De Felici
- Department of Biomedicine and Prevention, University of Rome ‘Tor Vergata', Rome 00133, Italy
| | - W Shen
- Institute of Reproductive Sciences, Qingdao Agricultural University, Qingdao 266109, China
- Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, College of Animal Science and Technology, Qingdao Agricultural University, Qingdao 266109, China
| |
Collapse
|
11
|
Yang YC, Tang YA, Shieh JM, Lin RK, Hsu HS, Wang YC. DNMT3B overexpression by deregulation of FOXO3a-mediated transcription repression and MDM2 overexpression in lung cancer. J Thorac Oncol 2014; 9:1305-15. [PMID: 25122426 DOI: 10.1097/jto.0000000000000240] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
INTRODUCTION DNA methyltransferase 3B (DNMT3B) contributes to de novo DNA methylation and its overexpression promotes tumorigenesis. However, whether DNMT3B is upregulated by transcriptional deregulation remains unclear. METHODS We studied the transcriptional repression of DNMT3B by forkhead O transcription factor 3a (FOXO3a) in lung cancer cell, animal, and clinical models. RESULTS The results of luciferase reporter assay showed that FOXO3a negatively regulated DNMT3B promoter activity by preferentially interacting with the binding element FOXO3a-E (+166 to +173) of DNMT3B promoter. Ectopically overexpressed FOXO3a or combined treatment with doxorubicin to induce FOXO3a nuclear accumulation further bound at the distal site, FOXO3a-P (-249 to -242) by chromatin-immunoprecipitation assay. Knockdown of FOXO3a resulted in an open chromatin structure and high DNMT3B mRNA and protein expression. Abundant FOXO3a repressed DNMT3B promoter by establishing a repressed chromatin structure. Note that FOXO3a is a degradation substrate of MDM2 E3-ligase. Cotreatment with doxorubicin and MDM2 inhibitor, Nutlin-3, further enforced abundant nuclear accumulation of FOXO3a resulting in decrease expression of DNMT3B leading to synergistic inhibition of tumor growth and decrease of methylation status on tumor suppressor genes in xenograft specimens. Clinically, lung cancer patients with DNMT3B high, FOXO3a low, and MDM2 high expression profile correlated with poor prognosis examined by immunohistochemistry and Kaplan-Meier survival analysis. CONCLUSIONS We reveal a new mechanism that FOXO3a transcriptionally represses DNMT3B expression and this regulation can be attenuated by MDM2 overexpression in human lung cancer model. Cotreatment with doxorubicin and Nutlin-3 is a novel therapeutic strategy through epigenetic modulation.
Collapse
Affiliation(s)
- Yi-Chieh Yang
- *Department of Pharmacology, College of Medicine, National Cheng Kung University, Tainan, Taiwan; †Institute of Basic Medical Science, College of Medicine, National Cheng Kung University, Tainan, Taiwan; ‡Division of Chest Medicine, Department of Internal Medicine, Chi Mei Medical Center, Tainan; The Center of General Education, Chia Nan University of Pharmacy & Science, Tainan, Taiwan; §Graduate Institute of Pharmacognosy, Taipei Medical University, Taipei, Taiwan; and ‖Division of Thoracic Surgery, Taipei Veterans General Hospital; Institute of Emergency and Critical Care Medicine, National Yang-Ming University School of Medicine, Taipei, Taiwan
| | | | | | | | | | | |
Collapse
|
12
|
Irwin RE, Thakur A, O' Neill KM, Walsh CP. 5-Hydroxymethylation marks a class of neuronal gene regulated by intragenic methylcytosine levels. Genomics 2014; 104:383-92. [PMID: 25179375 DOI: 10.1016/j.ygeno.2014.08.013] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2014] [Revised: 08/14/2014] [Accepted: 08/18/2014] [Indexed: 01/01/2023]
Abstract
We recently identified a class of neuronal gene inheriting high levels of intragenic methylation from the mother and maintaining this through later development. We show here that these genes are implicated in basic neuronal functions such as post-synaptic signalling, rather than neuronal development and inherit high levels of 5mC, but not 5hmC, from the mother. 5mC is distributed across the gene body and appears to facilitate transcription, as transcription is reduced in DNA methyltransferase I (Dnmt1) knockout embryonic stem cells as well as in fibroblasts treated with a methyltransferase inhibitor. However in adult brain, transcription is more closely associated with a gain in 5hmC, which occurs without a measurable loss of 5mC. These findings add to growing evidence that there may be a role for 5mC in promoting transcription as well as its classical role in gene silencing.
Collapse
Affiliation(s)
- Rachelle E Irwin
- Centre for Molecular Biosciences, School of Biomedical Sciences, University of Ulster, Coleraine BT52 1SA, UK
| | - Avinash Thakur
- Centre for Molecular Biosciences, School of Biomedical Sciences, University of Ulster, Coleraine BT52 1SA, UK
| | - Karla M O' Neill
- Centre for Molecular Biosciences, School of Biomedical Sciences, University of Ulster, Coleraine BT52 1SA, UK
| | - Colum P Walsh
- Centre for Molecular Biosciences, School of Biomedical Sciences, University of Ulster, Coleraine BT52 1SA, UK.
| |
Collapse
|
13
|
Li Y, Zhang W, Liu J, Wang W, Li H, Zhu J, Weng S, Xiao S, Wu T. Prepubertal bisphenol A exposure interferes with ovarian follicle development and its relevant gene expression. Reprod Toxicol 2014; 44:33-40. [DOI: 10.1016/j.reprotox.2013.09.002] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2012] [Revised: 05/14/2013] [Accepted: 09/06/2013] [Indexed: 12/01/2022]
|
14
|
Anckaert E, De Rycke M, Smitz J. Culture of oocytes and risk of imprinting defects. Hum Reprod Update 2012; 19:52-66. [DOI: 10.1093/humupd/dms042] [Citation(s) in RCA: 77] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
15
|
Zhang ZP, Liang GJ, Zhang XF, Zhang GL, Chao HH, Li L, Sun XF, Min LJ, Pan QJ, Shi QH, Sun QY, De Felici M, Shen W. Growth of mouse oocytes to maturity from premeiotic germ cells in vitro. PLoS One 2012; 7:e41771. [PMID: 22848595 PMCID: PMC3404094 DOI: 10.1371/journal.pone.0041771] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2012] [Accepted: 06/26/2012] [Indexed: 11/23/2022] Open
Abstract
In the present study, we established an in vitro culture system suitable for generating fertilizable oocytes from premeiotic mouse female germ cells. These results were achieved after first establishing an in vitro culture system allowing immature oocytes from 12–14 day- old mice to reach meiotic maturation through culture onto preantral granulosa cell (PAGC) monolayers in the presence of Activin A (ActA). To generate mature oocytes from premeiotic germ cells, pieces of ovaries from 12.5 days post coitum (dpc) embryos were cultured in medium supplemented with ActA for 28 days and the oocytes formed within the explants were isolated and cocultured onto PAGC monolayers in the presence of ActA for 6–7 days. The oocytes were then subjected to a final meiotic maturation assay to evaluate their capability to undergo germinal vesicle break down (GVBD) and reach the metaphase II (MII) stage. We found that during the first 28 days of culture, a significant number of oocytes within the ovarian explants reached nearly full growth and formed preantral follicle-like structures with the surrounding somatic cells. GSH level and Cx37 expression in the oocytes within the explants were indicative of proper developmental conditions. Moreover, the imprinting of Igf2r and Peg3 genes in these oocytes was correctly established. Further culture onto PAGCs in the presence of ActA allowed about 16% of the oocytes to undergo GVBD, among which 17% reached the MII stage during the final 16–18 hr maturation culture. These MII oocytes showed normal spindle and chromosome assembly and a correct ERK1/2 activity. About 35% of the in vitro matured oocytes were fertilized and 53.44% of them were able to reach the 2-cell stage. Finally, around 7% of the 2-cell embryos developed to the morula/blastocyst stage.
Collapse
Affiliation(s)
- Zhi-Peng Zhang
- Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, Qingdao Agricultural University, Qingdao, China
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
16
|
O'Doherty AM, O'Shea LC, Fair T. Bovine DNA Methylation Imprints Are Established in an Oocyte Size-Specific Manner, Which Are Coordinated with the Expression of the DNMT3 Family Proteins1. Biol Reprod 2012; 86:67. [DOI: 10.1095/biolreprod.111.094946] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
|
17
|
O'Doherty AM, Rutledge CE, Sato S, Thakur A, Lees-Murdock DJ, Hata K, Walsh CP. DNA methylation plays an important role in promoter choice and protein production at the mouse Dnmt3L locus. Dev Biol 2011; 356:411-20. [PMID: 21645502 DOI: 10.1016/j.ydbio.2011.05.665] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2011] [Revised: 05/12/2011] [Accepted: 05/22/2011] [Indexed: 01/01/2023]
Abstract
The DNA methyltransferase 3-like (Dnmt3L) protein is a crucial cofactor in the germ line for the de novo methyltransferase Dnmt3a, which establishes imprints and represses transposable elements. We have previously shown that Dnmt3L transcription is regulated via three different promoters in mice, producing transcripts we term Dnmt3L(s) (stem cell), Dnmt3L(o) (oocyte) and Dnmt3L(at) (adult testis). Here we show that both Dnmt3L(s) and Dnmt3L(o) produce full-length proteins but that the Dnmt3L(at) transcripts are not translated. Although not a canonical CpG island, the Dnmt3L(s) promoter is silenced by methylation during somatic differentiation in parallel with germ-cell-specific genes. During oocyte growth, Dnmt3L(s) also becomes heavily methylated and silenced and this requires its own gene product, since there is complete loss of methylation and derepression of transcription from this promoter in oocytes derived from Dnmt3L(-/-) mice. Methylation of the Dnmt3L(s) promoter is established prior to the completion of imprinting and explains the requirement in mouse oocytes for the Dnmt3L(o) promoter, located in an intron of the neighboring unmethylated Aire gene. Overall these results give insight into how and why promoter switching at the mouse Dnmt3L locus occurs and provide one of the first examples of a non-imprinted locus where methylation plays a role in promoter choice. The derepression of the Dnmt3L(s) promoter in the knockout oocytes also suggests that other non-imprinted loci may be dysregulated in these cells and contribute to the phenotype of the resultant mice.
Collapse
Affiliation(s)
- Alan M O'Doherty
- Transcriptional Regulation and Epigenetics Research Group, Centre for Molecular Biosciences, School of Biomedical Sciences, University of Ulster, Coleraine, Northern Ireland, UK
| | | | | | | | | | | | | |
Collapse
|
18
|
Zama AM, Uzumcu M. Epigenetic effects of endocrine-disrupting chemicals on female reproduction: an ovarian perspective. Front Neuroendocrinol 2010; 31:420-39. [PMID: 20609371 PMCID: PMC3009556 DOI: 10.1016/j.yfrne.2010.06.003] [Citation(s) in RCA: 103] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/04/2010] [Revised: 06/16/2010] [Accepted: 06/25/2010] [Indexed: 01/16/2023]
Abstract
The link between in utero and neonatal exposure to environmental toxicants, such as endocrine-disrupting chemicals (EDCs) and adult female reproductive disorders is well established in both epidemiological and animal studies. Recent studies examining the epigenetic mechanisms involved in mediating the effects of EDCs on female reproduction are gathering momentum. In this review, we describe the developmental processes that are susceptible to EDC exposures in female reproductive system, with a special emphasis on the ovary. We discuss studies with select EDCs that have been shown to have physiological and correlated epigenetic effects in the ovary, neuroendocrine system, and uterus. Importantly, EDCs that can directly target the ovary can alter epigenetic mechanisms in the oocyte, leading to transgenerational epigenetic effects. The potential mechanisms involved in such effects are also discussed.
Collapse
Affiliation(s)
- Aparna Mahakali Zama
- Department of Animal Sciences, School of Environmental and Biological Sciences, Rutgers, The State University of New Jersey, New Brunswick, NJ 08901-8525, USA
| | | |
Collapse
|
19
|
Colosimo A, Di Rocco G, Curini V, Russo V, Capacchietti G, Berardinelli P, Mattioli M, Barboni B. Characterization of the methylation status of five imprinted genes in sheep gametes. Anim Genet 2009; 40:900-8. [PMID: 19694650 DOI: 10.1111/j.1365-2052.2009.01939.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Genomic imprinting is a mammalian developmental process that uses epigenetic mechanisms to induce monoallelic and parental-specific expression of particular autosomal genes. A crucial epigenetic event consists of DNA methylation of CpG-islands, which become differentially methylated regions (DMRs) on the maternal and paternal alleles during oogenesis or spermatogenesis (germline DMRs). By contrast, somatic DMRs are acquired after fertilization. While there are several studies referring to methylation acquisition within germline DMRs in the mouse and human, a comparable methylation analysis of orthologous sequences is still lacking in sheep. To identify germline DMRs, this study analysed the methylation status of the available CpG-islands of five ovine imprinted genes (H19, IGF2R, DLK1, DIO3 and BEGAIN) in mature spermatozoa and in female gametes at different stages of their follicle growth, including in vitro matured oocytes. The 5'-end CpG-island of H19 showed a full methylation in spermatozoa and an absent methylation in growing and fully grown oocytes. The intron 2 CpG-island of IGF2R was unmethylated in male gametes, while it showed a high level of methylation in early stages of oogenesis. The promoter CpG-islands of DLK1 and DIO3 were found to be unmethylated both in spermatozoa and oocytes. Finally, the exon 9 CpG-island of BEGAIN was hypermethylated in mature male gametes, while it showed an almost complete methylation only in late stages of oocyte development. Our findings suggest that DNA methylation establishment during early stages of sheep oogenesis and subsequent in vitro maturation is gene-specific and that, of the five genes investigated, only the CpG-islands of H19 and IGF2R might represent ovine germline DMRs.
Collapse
Affiliation(s)
- A Colosimo
- Department of Comparative Biomedical Sciences, Faculty of Veterinary Medicine, Teramo University, Piazza Aldo Moro 45, 64100 Teramo, Italy.
| | | | | | | | | | | | | | | |
Collapse
|
20
|
Song Z, Min L, Pan Q, Shi Q, Shen W. Maternal imprinting during mouse oocyte growth in vivo and in vitro. Biochem Biophys Res Commun 2009; 387:800-5. [PMID: 19646963 DOI: 10.1016/j.bbrc.2009.07.131] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2009] [Accepted: 07/25/2009] [Indexed: 10/20/2022]
Abstract
Epigenetic regulation of gene expression is critical for oogenesis in mammals. In this study, a simple and efficient method was used to obtain the oocytes from cultured fetal mouse ovaries of 12.5dpc. The methylation pattern of these oocytes was examined. The results showed that the establishment of imprinting of Igf2r and Peg3 in oocytes derived from cultured fetal mouse germ cells in vitro follows a slower time course than that of oocytes in vivo. However, oocytes in vitro and in vivo share similar methylation patterns. Igf2r was gradually de novo methylated, and the methylation covers 80% CpG sites in oocytes cultured for 28days. However, only 45% of the CpG sites is methylated in Peg3 at the same stage. Furthermore, it demonstrated that the degree of DNA methylation is positively correlated with the size of oocytes in vitro and in vivo, indicating a progressive methylation process during oocyte growth.
Collapse
|
21
|
Dong H, Li L, Song Z, Tang J, Xu B, Zhai X, Sun L, Zhang P, Li Z, Pan Q, Shi Q, Shen W. Premeiotic fetal murine germ cells cultured in vitro form typical oocyte-like cells but do not progress through meiosis. Theriogenology 2009; 72:219-31. [DOI: 10.1016/j.theriogenology.2009.02.021] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2008] [Revised: 02/24/2009] [Accepted: 02/25/2009] [Indexed: 11/26/2022]
|