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Mihalas BP, Marston AL, Wu LE, Gilchrist RB. Reproductive Ageing: Metabolic contribution to age-related chromosome missegregation in mammalian oocytes. Reproduction 2024; 168:e230510. [PMID: 38718822 PMCID: PMC11301428 DOI: 10.1530/rep-23-0510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Accepted: 05/07/2024] [Indexed: 06/29/2024]
Abstract
In brief Chromosome missegregation and declining energy metabolism are considered to be unrelated features of oocyte ageing that contribute to poor reproductive outcomes. Given the bioenergetic cost of chromosome segregation, we propose here that altered energy metabolism during ageing may be an underlying cause of age-related chromosome missegregation and aneuploidy. Abstract Advanced reproductive age in women is a major cause of infertility, miscarriage and congenital abnormalities. This is principally caused by a decrease in oocyte quality and developmental competence with age. Oocyte ageing is characterised by an increase in chromosome missegregation and aneuploidy. However, the underlying mechanisms of age-related aneuploidy have not been fully elucidated and are still under active investigation. In addition to chromosome missegregation, oocyte ageing is also accompanied by metabolic dysfunction. In this review, we integrate old and new perspectives on oocyte ageing, chromosome segregation and metabolism in mammalian oocytes and make direct links between these processes. We consider age-related alterations to chromosome segregation machinery, including the loss of cohesion, microtubule stability and the integrity of the spindle assembly checkpoint. We focus on how metabolic dysfunction in the ageing oocyte disrupts chromosome segregation machinery to contribute to and exacerbate age-related aneuploidy. More specifically, we discuss how mitochondrial function, ATP production and the generation of free radicals are altered during ageing. We also explore recent developments in oocyte metabolic ageing, including altered redox reactions (NAD+ metabolism) and the interactions between oocytes and their somatic nurse cells. Throughout the review, we integrate the mechanisms by which changes in oocyte metabolism influence age-related chromosome missegregation.
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Affiliation(s)
- Bettina P Mihalas
- Oocyte Biology Research Unit, Discipline of Women’s Health, School of Clinical Medicine, Faculty of Medicine and Health, UNSW Sydney, Kensington, Australia
| | - Adele L Marston
- Wellcome Centre for Cell Biology, Institute of Cell Biology, School of Biological Sciences, University of Edinburgh, Edinburgh, United Kingdom
| | - Lindsay E Wu
- School of Biomedical Sciences, Faculty of Medicine and Health, UNSW Sydney, Kensington, Australia
| | - Robert B Gilchrist
- Oocyte Biology Research Unit, Discipline of Women’s Health, School of Clinical Medicine, Faculty of Medicine and Health, UNSW Sydney, Kensington, Australia
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Zhang X, Shi S, Wan Y, Song W, Jin H, Sun Y. Single-cell RNA sequencing of human oocytes reveals a differential transcriptomic profile associated with agar-like zona pellucida. J Ovarian Res 2024; 17:132. [PMID: 38926883 PMCID: PMC11200816 DOI: 10.1186/s13048-024-01463-8] [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: 06/05/2023] [Accepted: 06/20/2024] [Indexed: 06/28/2024] Open
Abstract
BACKGROUND Agar-like zona pellucida (ZP) is the most common type of abnormal ZP, and is one of the causes of low fertility or infertility. However, the molecular mechanism of agar-like ZP is unclear. Single-cell RNA-sequencing (scRNA-seq) analysis was used to assess the cellular and molecular landscape of oocytes with agar-like ZP. METHODS Human metaphase I (MI) oocytes were collected from four patients with agar-like ZP and four healthy donors. Total RNA was isolated, cDNA was synthesized, and libraries were generated and subsequently sequenced on a HiSeq 2500 instrument. The scRNA-seq data were analyzed with R software. RESULTS We identified 1320 genes that were differentially expressed between agar-like ZP oocytes and healthy donor oocytes. Gene Ontology term enrichment results showed that the genes downregulated in agar-like ZP oocytes were significantly related to extracellular matrix organization, while the genes upregulated in agar-like ZP oocytes were significantly related to the regulation of response to DNA damage stimulus. The Kyoto Encyclopedia of Genes and Genomes enrichment results showed that genes were enriched in the ECM-receptor interaction pathway and focal adhesion pathway. Other signaling pathways important in oocyte development were also enriched, such as PI3K-Akt. Differential expression analysis identified UBC, TLR4, RELA, ANXA5, CAV1, KPNA2, CCNA2, ACTA2, FYN and ITGB3 as genetic markers of oocytes with agar-like ZP. CONCLUSIONS Our findings suggest that agar-like ZP oocytes exhibit significant downregulation of genes involved in the ECM-receptor interaction signaling pathway and focal adhesion pathway, which could lead to aberrant ZP formation, while the upregulated genes were significantly related to regulation of the response to DNA damage stimulus. Agar-like ZP formation may interfere with the normal exchange of signals between oocytes and perivitelline granulosa cells, thereby preventing cumulus cells from participating in oocyte DNA damage repair and causing MI arrest.
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Affiliation(s)
- Xiangyang Zhang
- Reproductive Medical Center, Henan Province Key Laboratory for Reproduction and Genetics, First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, People's Republic of China.
| | - Senlin Shi
- Reproductive Medical Center, Henan Province Key Laboratory for Reproduction and Genetics, First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, People's Republic of China
| | - Ying Wan
- Reproductive Medical Center, Henan Province Key Laboratory for Reproduction and Genetics, First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, People's Republic of China
| | - Wenyan Song
- Reproductive Medical Center, Henan Province Key Laboratory for Reproduction and Genetics, First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, People's Republic of China
| | - Haixia Jin
- Reproductive Medical Center, Henan Province Key Laboratory for Reproduction and Genetics, First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, People's Republic of China
| | - Yingpu Sun
- Reproductive Medical Center, Henan Province Key Laboratory for Reproduction and Genetics, First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, People's Republic of China
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Huang W, Li X, Yang H, Huang H. The impact of maternal age on aneuploidy in oocytes: Reproductive consequences, molecular mechanisms, and future directions. Ageing Res Rev 2024; 97:102292. [PMID: 38582380 DOI: 10.1016/j.arr.2024.102292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2023] [Revised: 03/12/2024] [Accepted: 04/01/2024] [Indexed: 04/08/2024]
Abstract
Age-related aneuploidy in human oocytes is a major factor contributing to decreased fertility and adverse reproductive outcomes. As females age, their oocytes are more prone to meiotic chromosome segregation errors, leading primarily to aneuploidy. Elevated aneuploidy rates have also been observed in oocytes from very young, prepubertal conceptions. A key barrier to developing effective treatments for age-related oocyte aneuploidy is our incomplete understanding of the molecular mechanisms involved. The challenge is becoming increasingly critical as more people choose to delay childbearing, a trend that has significant societal implications. In this review, we summarize current knowledge regarding the process of oocyte meiosis and folliculogenesis, highlighting the relationship between age and chromosomal aberrations in oocytes and embryos, and integrate proposed mechanisms of age-related meiotic disturbances across structural, protein, and genomic levels. Our goal is to spur new research directions and therapeutic avenues.
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Affiliation(s)
- Weiwei Huang
- Obstetrics and Gynecology Hospital, Institute of Reproduction and Development, Fudan University, Shanghai, China; Shanghai Key Laboratory of Reproduction and Development, Shanghai, China; Research Units of Embryo Original Diseases, Chinese Academy of Medical Sciences (No. 2019RU056), Shanghai, China
| | - Xinyuan Li
- Obstetrics and Gynecology Hospital, Institute of Reproduction and Development, Fudan University, Shanghai, China; Shanghai Key Laboratory of Reproduction and Development, Shanghai, China; Research Units of Embryo Original Diseases, Chinese Academy of Medical Sciences (No. 2019RU056), Shanghai, China
| | - Hongbo Yang
- Obstetrics and Gynecology Hospital, Institute of Reproduction and Development, Fudan University, Shanghai, China; Shanghai Key Laboratory of Reproduction and Development, Shanghai, China; Research Units of Embryo Original Diseases, Chinese Academy of Medical Sciences (No. 2019RU056), Shanghai, China.
| | - Hefeng Huang
- Obstetrics and Gynecology Hospital, Institute of Reproduction and Development, Fudan University, Shanghai, China; Shanghai Key Laboratory of Reproduction and Development, Shanghai, China; Research Units of Embryo Original Diseases, Chinese Academy of Medical Sciences (No. 2019RU056), Shanghai, China; Shanghai Key Laboratory of Embryo Original Diseases, Shanghai, China; Department of Obstetrics and Gynecology, International Institutes of Medicine, the Fourth Affiliated Hospital of Zhejiang University School of Medicine, Yiwu, China; Key Laboratory of Reproductive Genetics (Ministry of Education), Department of Reproductive Endocrinology, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, China.
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4
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Daddangadi A, Uppangala S, Kabekkodu SP, Khan G N, Kalthur G, Talevi R, Adiga SK. Advanced Maternal Age Affects the Cryosusceptibility of Ovulated but not In Vitro Matured Mouse Oocytes. Reprod Sci 2024; 31:1420-1428. [PMID: 38294668 DOI: 10.1007/s43032-024-01462-6] [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: 11/09/2023] [Accepted: 01/12/2024] [Indexed: 02/01/2024]
Abstract
Oocyte cryopreservation is offered to women of various age groups for both health and social reasons. Oocytes derived from either controlled ovarian stimulation or in vitro maturation (IVM) are cryopreserved via vitrification. As maternal age is a significant determinant of oocyte quality, there is limited data on the age-related susceptibility of oocytes to the vitrification-warming procedure alone or in conjunction with IVM. In the present study, metaphase II oocytes obtained from 2, 6, 9, and 12 month old Swiss albino mice either by superovulation or IVM were used. To understand the association between maternal age and oocyte cryotolerance, oocytes were subjected to vitrification-warming and compared to non vitrified sibling oocytes. Survived oocytes were evaluated for mitochondrial potential, spindle integrity, relative expression of spindle checkpoint protein transcripts, and DNA double-strand breaks. Maturation potential and vitrification-warming survival were significantly affected (p < 0.001 and p < 0.05, respectively) in ovulated oocytes from the advanced age group but not in IVM oocytes. Although vitrification-warming significantly increased spindle abnormalities in ovulated oocytes from advanced maternal age (p < 0.01), no significant changes were observed in IVM oocytes. Furthermore, Bub1 and Mad2 transcript levels were significantly higher in vitrified-warmed IVM oocytes (p < 0.05). In conclusion, advanced maternal age can have a negative impact on the cryosusceptibility of ovulated oocytes but not IVM oocytes in mice.
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Affiliation(s)
- Akshatha Daddangadi
- Centre of Excellence in Clinical Embryology, Department of Reproductive Science, Kasturba Medical College, Manipal Academy of Higher Education, Manipal, 576 104, India
| | - Shubhashree Uppangala
- Division of Reproductive Genetics, Department of Reproductive Science, Kasturba Medical College, Manipal Academy of Higher Education, Manipal, 576 104, India
| | - Shama Prasada Kabekkodu
- Department of Cell and Molecular Biology, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, 576 104, India
| | - Nadeem Khan G
- Department of Cell and Molecular Biology, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, 576 104, India
| | - Guruprasad Kalthur
- Division of Reproductive Biology, Department of Reproductive Science, Kasturba Medical College, Manipal Academy of Higher Education, Manipal, 576 104, India
| | - Riccardo Talevi
- Dipartimento Di Biologia, Università Di Napoli "Federico II", Complesso Universitario Di Monte S Angelo, Naples, Italy
| | - Satish Kumar Adiga
- Centre of Excellence in Clinical Embryology, Department of Reproductive Science, Kasturba Medical College, Manipal Academy of Higher Education, Manipal, 576 104, India.
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Leem J, Lee C, Choi DY, Oh JS. Distinct characteristics of the DNA damage response in mammalian oocytes. Exp Mol Med 2024; 56:319-328. [PMID: 38355825 PMCID: PMC10907590 DOI: 10.1038/s12276-024-01178-2] [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: 08/20/2023] [Revised: 11/15/2023] [Accepted: 12/07/2023] [Indexed: 02/16/2024] Open
Abstract
DNA damage is a critical threat that poses significant challenges to all cells. To address this issue, cells have evolved a sophisticated molecular and cellular process known as the DNA damage response (DDR). Among the various cell types, mammalian oocytes, which remain dormant in the ovary for extended periods, are particularly susceptible to DNA damage. The occurrence of DNA damage in oocytes can result in genetic abnormalities, potentially leading to infertility, birth defects, and even abortion. Therefore, understanding how oocytes detect and repair DNA damage is of paramount importance in maintaining oocyte quality and preserving fertility. Although the fundamental concept of the DDR is conserved across various cell types, an emerging body of evidence reveals striking distinctions in the DDR between mammalian oocytes and somatic cells. In this review, we highlight the distinctive characteristics of the DDR in oocytes and discuss the clinical implications of DNA damage in oocytes.
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Affiliation(s)
- Jiyeon Leem
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, South Korea
| | - Crystal Lee
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, South Korea
| | - Da Yi Choi
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, South Korea
| | - Jeong Su Oh
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, South Korea.
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Sun F, Sutovsky P, Patterson AL, Balboula AZ. Mechanisms of DNA Damage Response in Mammalian Oocytes. ADVANCES IN ANATOMY, EMBRYOLOGY, AND CELL BIOLOGY 2024; 238:47-68. [PMID: 39030354 DOI: 10.1007/978-3-031-55163-5_3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/21/2024]
Abstract
DNA damage poses a significant challenge to all eukaryotic cells, leading to mutagenesis, genome instability and senescence. In somatic cells, the failure to repair damaged DNA can lead to cancer development, whereas, in oocytes, it can lead to ovarian dysfunction and infertility. The response of the cell to DNA damage entails a series of sequential and orchestrated events including sensing the DNA damage, activating DNA damage checkpoint, chromatin-related conformational changes, activating the DNA damage repair machinery and/or initiating the apoptotic cascade. This chapter focuses on how somatic cells and mammalian oocytes respond to DNA damage. Specifically, we will discuss how and why fully grown mammalian oocytes differ drastically from somatic cells and growing oocytes in their response to DNA damage.
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Affiliation(s)
- Fei Sun
- Division of Animal Sciences, University of Missouri, Columbia, MO, USA
| | - Peter Sutovsky
- Division of Animal Sciences, University of Missouri, Columbia, MO, USA
- Department of Obstetrics, Gynecology and Women's Health, University of Missouri, Columbia, MO, USA
| | - Amanda L Patterson
- Division of Animal Sciences, University of Missouri, Columbia, MO, USA
- Department of Obstetrics, Gynecology and Women's Health, University of Missouri, Columbia, MO, USA
| | - Ahmed Z Balboula
- Division of Animal Sciences, University of Missouri, Columbia, MO, USA.
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Grzeszczak K, Łanocha-Arendarczyk N, Malinowski W, Ziętek P, Kosik-Bogacka D. Oxidative Stress in Pregnancy. Biomolecules 2023; 13:1768. [PMID: 38136639 PMCID: PMC10741771 DOI: 10.3390/biom13121768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 12/05/2023] [Accepted: 12/06/2023] [Indexed: 12/24/2023] Open
Abstract
Recent years have seen an increased interest in the role of oxidative stress (OS) in pregnancy. Pregnancy inherently heightens susceptibility to OS, a condition fueled by a systemic inflammatory response that culminates in an elevated presence of reactive oxygen species (ROS) and reactive nitrogen species (RNS) in the circulatory system. The amplified OS in pregnancy can trigger a series of detrimental outcomes such as underdevelopment, abnormal placental function, and a host of pregnancy complications, including pre-eclampsia, embryonic resorption, recurrent pregnancy loss, fetal developmental anomalies, intrauterine growth restriction, and, in extreme instances, fetal death. The body's response to mitigate the uncontrolled increase in RNS/ROS levels requires trace elements that take part in non-enzymatic and enzymatic defense processes, namely, copper (Cu), zinc (Zn), manganese (Mn), and selenium (Se). Determination of ROS concentrations poses a challenge due to their short half-lives, prompting the use of marker proteins, including malondialdehyde (MDA), superoxide dismutase (SOD), glutathione peroxidase (GPx), glutathione reductase (GR), catalase (CAT), and glutathione (GSH). These markers, indicative of oxidative stress intensity, can offer indirect assessments of pregnancy complications. Given the limitations of conducting experimental studies on pregnant women, animal models serve as valuable substitutes for in-depth research. This review of such models delves into the mechanism of OS in pregnancy and underscores the pivotal role of OS markers in their evaluation.
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Affiliation(s)
- Konrad Grzeszczak
- Department of Biology and Medical Parasitology, Pomeranian Medical University in Szczecin, Powstanców Wielkopolskich 72, 70-111 Szczecin, Poland; (K.G.); (N.Ł.-A.)
- Department of Laboratory Diagnostics, Pomeranian Medical University, 70-111 Szczecin, Poland
| | - Natalia Łanocha-Arendarczyk
- Department of Biology and Medical Parasitology, Pomeranian Medical University in Szczecin, Powstanców Wielkopolskich 72, 70-111 Szczecin, Poland; (K.G.); (N.Ł.-A.)
| | - Witold Malinowski
- Faculty of Health Sciences, The Masovian. Public University in Płock, Plac Dąbrowskiego 2, 09-402 Płock, Poland;
| | - Paweł Ziętek
- Department of Orthopaedics, Traumatology and Orthopaedic Oncology, Pomeranian Medical University, Unii Lubelskiej 1, 71-252 Szczecin, Poland;
| | - Danuta Kosik-Bogacka
- Independent Laboratory of Pharmaceutical Botany, Department of Biology and Medical Parasitology, Pomeranian Medical University in Szczecin, Powstanców Wielkopolskich 72, 70-111 Szczecin, Poland
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8
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Zhou FY, Waterman DP, Caban-Penix S, Memisoglu G, Eapen VV, Haber JE. Prolonged Cell Cycle Arrest in Response to DNA damage in Yeast Requires the Maintenance of DNA Damage Signaling and the Spindle Assembly Checkpoint. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.05.15.540538. [PMID: 37292675 PMCID: PMC10245577 DOI: 10.1101/2023.05.15.540538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Cells evoke the DNA damage checkpoint (DDC) to inhibit mitosis in the presence of DNA double-strand breaks (DSBs) to allow more time for DNA repair. In budding yeast, a single irreparable DSB is sufficient to activate the DDC and induce cell cycle arrest prior to anaphase for about 12 to 15 hours, after which cells "adapt" to the damage by extinguishing the DDC and resuming the cell cycle. While activation of the DNA damage-dependent cell cycle arrest is well-understood, how it is maintained remains unclear. To address this, we conditionally depleted key DDC proteins after the DDC was fully activated and monitored changes in the maintenance of cell cycle arrest. Degradation of Ddc2 ATRIP , Rad9, Rad24, or Rad53 CHK2 results in premature resumption of the cell cycle, indicating that these DDC factors are required both to establish and to maintain the arrest. Dun1 is required for establishment, but not maintenance of arrest, whereas Chk1 is required for prolonged maintenance but not for initial establishment of the mitotic arrest. When the cells are challenged with 2 persistent DSBs, they remain permanently arrested. This permanent arrest is initially dependent on the continuous presence of Ddc2 and Rad53; however, after 15 hours both proteins become dispensable. Instead, the continued mitotic arrest is sustained by spindle-assembly checkpoint (SAC) proteins Mad1, Mad2, and Bub2 but not by Bub2's binding partner Bfa1. These data suggest that prolonged cell cycle arrest in response to 2 DSBs is achieved by a handoff from the DDC to specific components of the SAC. Furthermore, the establishment and maintenance of DNA damage-induced cell cycle arrest requires overlapping but different sets of factors.
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Mihajlović AI, Byers C, Reinholdt L, FitzHarris G. Spindle assembly checkpoint insensitivity allows meiosis-II despite chromosomal defects in aged eggs. EMBO Rep 2023; 24:e57227. [PMID: 37795949 PMCID: PMC10626445 DOI: 10.15252/embr.202357227] [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: 03/22/2023] [Revised: 09/07/2023] [Accepted: 09/19/2023] [Indexed: 10/06/2023] Open
Abstract
Chromosome segregation errors in mammalian oocyte meiosis lead to developmentally compromised aneuploid embryos and become more common with advancing maternal age. Known contributors include age-related chromosome cohesion loss and spindle assembly checkpoint (SAC) fallibility in meiosis-I. But how effective the SAC is in meiosis-II and how this might contribute to age-related aneuploidy is unknown. Here, we developed genetic and pharmacological approaches to directly address the function of the SAC in meiosis-II. We show that the SAC is insensitive in meiosis-II oocytes and that as a result misaligned chromosomes are randomly segregated. Whilst SAC ineffectiveness in meiosis-II is not age-related, it becomes most prejudicial in oocytes from older females because chromosomes that prematurely separate by age-related cohesion loss become misaligned in meiosis-II. We show that in the absence of a robust SAC in meiosis-II these age-related misaligned chromatids are missegregated and lead to aneuploidy. Our data demonstrate that the SAC fails to prevent cell division in the presence of misaligned chromosomes in oocyte meiosis-II, which explains how age-related cohesion loss can give rise to aneuploid embryos.
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Affiliation(s)
| | - Candice Byers
- The Institute for Experiential AI, Roux InstituteNortheastern UniversityPortlandMEUSA
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Ratnayaka-Gamage ND, Alesi LR, Zerafa N, Stringer JM, Hutt KJ. Xrcc5/KU80 is not required for the survival or activation of prophase-arrested oocytes in primordial follicles. Front Endocrinol (Lausanne) 2023; 14:1268009. [PMID: 37900135 PMCID: PMC10603181 DOI: 10.3389/fendo.2023.1268009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Accepted: 09/18/2023] [Indexed: 10/31/2023] Open
Abstract
Introduction The non-growing, meiotically-arrested oocytes housed within primordial follicles are exquisitely sensitive to genotoxic insults from endogenous and exogenous sources. Even a single DNA double-strand break (DSB) can trigger oocyte apoptosis, which can lead to accelerated depletion of the ovarian reserve, early loss of fertility and menopause. Therefore, repair of DNA damage is important for preserving the quality of oocytes to sustain fertility across the reproductive lifespan. This study aimed to evaluate the role of KU80 (encoded by the XRCC5 gene) - an essential component of the non-homologous end joining (NHEJ) pathway - in the repair of oocyte DNA DSBs during reproductive ageing, and following insult caused by the DNA-damaging chemotherapies cyclophosphamide and cisplatin. Methods To investigate the importance of KU80 following endogenous and exogenous DNA damage, ovaries from conditional oocyte-specific Xrcc5 knockout (Xrcc5 cKO) and wildtype (WT) mice that were aged or exposed to DNA damage-inducing chemotherapy were compared. Ovarian follicles and oocytes were quantified, morphologically assessed and analysed via immunohistochemistry for markers of DNA damage and apoptosis. In addition, chemotherapy exposed mice were superovulated, and the numbers and quality of mature metaphase- II (MII) oocytes were assessed. Results The number of healthy follicles, atretic (dying) follicles, and corpora lutea were similar in Xrcc5 cKO and WT mice at PN50, PN200 and PN300. Additionally, primordial follicle number and ovulation rates were similar in young adult Xrcc5 cKO and WT mice following treatment with cyclophosphamide (75mg/kg), cisplatin (4mg/kg), or vehicle control (saline). Furthermore, KU80 was not essential for the repair of exogenously induced DNA damage in primordial follicle oocytes. Discussion These data indicate that KU80 is not required for maintenance of the ovarian reserve, follicle development, or ovulation during maternal ageing. Similarly, this study also indicates that KU80 is not required for the repair of exogenously induced DSBs in the prophase-arrested oocytes of primordial follicles.
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Affiliation(s)
| | | | | | | | - Karla J. Hutt
- *Correspondence: Jessica M. Stringer, ; Karla J. Hutt,
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Huang J, Chen P, Jia L, Li T, Yang X, Liang Q, Zeng Y, Liu J, Wu T, Hu W, Kee K, Zeng H, Liang X, Zhou C. Multi-Omics Analysis Reveals Translational Landscapes and Regulations in Mouse and Human Oocyte Aging. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2301538. [PMID: 37401155 PMCID: PMC10502832 DOI: 10.1002/advs.202301538] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 05/28/2023] [Indexed: 07/05/2023]
Abstract
Abnormal resumption of meiosis and decreased oocyte quality are hallmarks of maternal aging. Transcriptional silencing makes translational control an urgent task during meiosis resumption in maternal aging. However, insights into aging-related translational characteristics and underlying mechanisms are limited. Here, using multi-omics analysis of oocytes, it is found that translatomics during aging is related to changes in the proteome and reveals decreased translational efficiency with aging phenotypes in mouse oocytes. Translational efficiency decrease is associated with the N6-methyladenosine (m6A) modification of transcripts. It is further clarified that m6A reader YTHDF3 is significantly decreased in aged oocytes, inhibiting oocyte meiotic maturation. YTHDF3 intervention perturbs the translatome of oocytes and suppress the translational efficiency of aging-associated maternal factors, such as Hells, to affect the oocyte maturation. Moreover, the translational landscape is profiled in human oocyte aging, and the similar translational changes of epigenetic modifications regulators between human and mice oocyte aging are observed. In particular, due to the translational silence of YTHDF3 in human oocytes, translation activity is not associated with m6A modification, but alternative splicing factor SRSF6. Together, the findings profile the specific translational landscapes during oocyte aging in mice and humans, and uncover non-conservative regulators on translation control in meiosis resumption and maternal aging.
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Affiliation(s)
- Jiana Huang
- Reproductive Medicine CenterThe Sixth Affiliated Hospital of Sun Yat‐sen UniversityGuangzhou510655China
- Guangdong Engineering Technology Research Center of Fertility PreservationGuangzhou510610China
- Biomedical Innovation CenterThe Sixth Affiliated Hospital, Sun Yat‐sen UniversityGuangzhou510655China
| | - Peigen Chen
- Reproductive Medicine CenterThe Sixth Affiliated Hospital of Sun Yat‐sen UniversityGuangzhou510655China
- Guangdong Engineering Technology Research Center of Fertility PreservationGuangzhou510610China
- Biomedical Innovation CenterThe Sixth Affiliated Hospital, Sun Yat‐sen UniversityGuangzhou510655China
| | - Lei Jia
- Reproductive Medicine CenterThe Sixth Affiliated Hospital of Sun Yat‐sen UniversityGuangzhou510655China
- Guangdong Engineering Technology Research Center of Fertility PreservationGuangzhou510610China
- Biomedical Innovation CenterThe Sixth Affiliated Hospital, Sun Yat‐sen UniversityGuangzhou510655China
| | - Tingting Li
- Reproductive Medicine CenterThe Sixth Affiliated Hospital of Sun Yat‐sen UniversityGuangzhou510655China
- Guangdong Engineering Technology Research Center of Fertility PreservationGuangzhou510610China
- Biomedical Innovation CenterThe Sixth Affiliated Hospital, Sun Yat‐sen UniversityGuangzhou510655China
| | - Xing Yang
- Reproductive Medicine CenterThe Sixth Affiliated Hospital of Sun Yat‐sen UniversityGuangzhou510655China
- Guangdong Engineering Technology Research Center of Fertility PreservationGuangzhou510610China
- Biomedical Innovation CenterThe Sixth Affiliated Hospital, Sun Yat‐sen UniversityGuangzhou510655China
| | - Qiqi Liang
- Reproductive Medicine CenterThe Sixth Affiliated Hospital of Sun Yat‐sen UniversityGuangzhou510655China
- Guangdong Engineering Technology Research Center of Fertility PreservationGuangzhou510610China
- Biomedical Innovation CenterThe Sixth Affiliated Hospital, Sun Yat‐sen UniversityGuangzhou510655China
| | - Yanyan Zeng
- Reproductive Medicine CenterThe Sixth Affiliated Hospital of Sun Yat‐sen UniversityGuangzhou510655China
- Guangdong Engineering Technology Research Center of Fertility PreservationGuangzhou510610China
- Biomedical Innovation CenterThe Sixth Affiliated Hospital, Sun Yat‐sen UniversityGuangzhou510655China
| | - Jiawen Liu
- Reproductive Medicine CenterThe Sixth Affiliated Hospital of Sun Yat‐sen UniversityGuangzhou510655China
- Guangdong Engineering Technology Research Center of Fertility PreservationGuangzhou510610China
- Biomedical Innovation CenterThe Sixth Affiliated Hospital, Sun Yat‐sen UniversityGuangzhou510655China
| | - Taibao Wu
- Reproductive Medicine CenterThe Sixth Affiliated Hospital of Sun Yat‐sen UniversityGuangzhou510655China
- Guangdong Engineering Technology Research Center of Fertility PreservationGuangzhou510610China
- Biomedical Innovation CenterThe Sixth Affiliated Hospital, Sun Yat‐sen UniversityGuangzhou510655China
| | - Wenqi Hu
- Center for Stem Cell Biology and Regenerative Medicine, Department of Basic Medical Sciences, School of MedicineTsinghua UniversityBeijing100084China
| | - Kehkooi Kee
- Center for Stem Cell Biology and Regenerative Medicine, Department of Basic Medical Sciences, School of MedicineTsinghua UniversityBeijing100084China
| | - Haitao Zeng
- Reproductive Medicine CenterThe Sixth Affiliated Hospital of Sun Yat‐sen UniversityGuangzhou510655China
- Guangdong Engineering Technology Research Center of Fertility PreservationGuangzhou510610China
- Biomedical Innovation CenterThe Sixth Affiliated Hospital, Sun Yat‐sen UniversityGuangzhou510655China
| | - Xiaoyan Liang
- Reproductive Medicine CenterThe Sixth Affiliated Hospital of Sun Yat‐sen UniversityGuangzhou510655China
- Guangdong Engineering Technology Research Center of Fertility PreservationGuangzhou510610China
- Biomedical Innovation CenterThe Sixth Affiliated Hospital, Sun Yat‐sen UniversityGuangzhou510655China
| | - Chuanchuan Zhou
- Reproductive Medicine CenterThe Sixth Affiliated Hospital of Sun Yat‐sen UniversityGuangzhou510655China
- Guangdong Engineering Technology Research Center of Fertility PreservationGuangzhou510610China
- Biomedical Innovation CenterThe Sixth Affiliated Hospital, Sun Yat‐sen UniversityGuangzhou510655China
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12
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Ferreira AF, Soares M, Almeida-Santos T, Ramalho-Santos J, Sousa AP. Aging and oocyte competence: A molecular cell perspective. WIREs Mech Dis 2023; 15:e1613. [PMID: 37248206 DOI: 10.1002/wsbm.1613] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 12/30/2022] [Accepted: 04/19/2023] [Indexed: 05/31/2023]
Abstract
Follicular microenvironment is paramount in the acquisition of oocyte competence, which is dependent on two interconnected and interdependent processes: nuclear and cytoplasmic maturation. Extensive research conducted in human and model systems has provided evidence that those processes are disturbed with female aging. In fact, advanced maternal age (AMA) is associated with a lower chance of pregnancy and live birth, explained by the age-related decline in oocyte quality/competence. This decline has largely been attributed to mitochondria, essential for oocyte maturation, fertilization, and embryo development; with mitochondrial dysfunction leading to oxidative stress, responsible for nuclear and mitochondrial damage, suboptimal intracellular energy levels, calcium disturbance, and meiotic spindle alterations, that may result in oocyte aneuploidy. Nuclear-related mechanisms that justify increased oocyte aneuploidy include deoxyribonucleic acid (DNA) damage, loss of chromosomal cohesion, spindle assembly checkpoint dysfunction, meiotic recombination errors, and telomere attrition. On the other hand, age-dependent cytoplasmic maturation failure is related to mitochondrial dysfunction, altered mitochondrial biogenesis, altered mitochondrial morphology, distribution, activity, and dynamics, dysmorphic smooth endoplasmic reticulum and calcium disturbance, and alterations in the cytoskeleton. Furthermore, reproductive somatic cells also experience the effects of aging, including mitochondrial dysfunction and DNA damage, compromising the crosstalk between granulosa/cumulus cells and oocytes, also affected by a loss of gap junctions. Old oocytes seem therefore to mature in an altered microenvironment, with changes in metabolites, ribonucleic acid (RNA), proteins, and lipids. Overall, understanding the mechanisms implicated in the loss of oocyte quality will allow the establishment of emerging biomarkers and potential therapeutic anti-aging strategies. This article is categorized under: Reproductive System Diseases > Molecular and Cellular Physiology.
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Affiliation(s)
- Ana Filipa Ferreira
- Reproductive Medicine Unit, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal
- Faculty of Medicine, Azinhaga de Santa Comba, University of Coimbra, Coimbra, Portugal
- CNC-Center for Neuroscience and Cell Biology, CIBB, University of Coimbra, Coimbra, Portugal
| | - Maria Soares
- CNC-Center for Neuroscience and Cell Biology, CIBB, University of Coimbra, Coimbra, Portugal
- PhD Programme in Experimental Biology and Biomedicine (PDBEB), Institute for Interdisciplinary Research (IIIUC), University of Coimbra, Coimbra, Portugal
| | - Teresa Almeida-Santos
- Reproductive Medicine Unit, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal
- Faculty of Medicine, Azinhaga de Santa Comba, University of Coimbra, Coimbra, Portugal
- CNC-Center for Neuroscience and Cell Biology, CIBB, University of Coimbra, Coimbra, Portugal
| | - João Ramalho-Santos
- CNC-Center for Neuroscience and Cell Biology, CIBB, University of Coimbra, Coimbra, Portugal
- Department of Life Sciences, Calçada Martim de Freitas, University of Coimbra, Coimbra, Portugal
| | - Ana Paula Sousa
- Reproductive Medicine Unit, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal
- CNC-Center for Neuroscience and Cell Biology, CIBB, University of Coimbra, Coimbra, Portugal
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13
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Cai X, Stringer JM, Zerafa N, Carroll J, Hutt KJ. Xrcc5/Ku80 is required for the repair of DNA damage in fully grown meiotically arrested mammalian oocytes. Cell Death Dis 2023; 14:397. [PMID: 37407587 DOI: 10.1038/s41419-023-05886-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 05/07/2023] [Accepted: 06/12/2023] [Indexed: 07/07/2023]
Abstract
Mammalian oocytes spend most of their life in a unique state of cell cycle arrest at meiotic prophase I, during which time they are exposed to countless DNA-damaging events. Recent studies have shown that DNA double-strand break repair occurs predominantly via the homologous recombination (HR) pathway in small non-growing meiotically arrested oocytes (primordial follicle stage). However, the DNA repair mechanisms employed by fully grown meiotically arrested oocytes (GV-stage) have not been studied in detail. Here we established a conditional knockout mouse model to explore the role of Ku80, a critical component of the nonhomologous end joining (NHEJ) pathway, in the repair of DNA damage in GV oocytes. GV oocytes lacking Ku80 failed to repair etoposide-induced DNA damage, even when only low levels of damage were sustained. This indicates Ku80 is needed to resolve DSBs and that HR cannot compensate for a compromised NHEJ pathway in fully-grown oocytes. When higher levels of DNA damage were induced, a severe delay in M-phase entry was observed in oocytes lacking XRCC5 compared to wild-type oocytes, suggesting that Ku80-dependent repair of DNA damage is important for the timely release of oocytes from prophase I and resumption of meiosis. Ku80 was also found to be critical for chromosome integrity during meiotic maturation following etoposide exposure. These data demonstrate that Ku80, and NHEJ, are vital for quality control in mammalian GV stage oocytes and reveal that DNA repair pathway choice differs in meiotically arrested oocytes according to growth status.
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Affiliation(s)
- Xuebi Cai
- Department of Anatomy and Developmental Biology, Biomedicine Discovery Institute, Monash University, Clayton, VIC, 3800, Australia
| | - Jessica M Stringer
- Department of Anatomy and Developmental Biology, Biomedicine Discovery Institute, Monash University, Clayton, VIC, 3800, Australia
| | - Nadeen Zerafa
- Department of Anatomy and Developmental Biology, Biomedicine Discovery Institute, Monash University, Clayton, VIC, 3800, Australia
| | - John Carroll
- Department of Anatomy and Developmental Biology, Biomedicine Discovery Institute, Monash University, Clayton, VIC, 3800, Australia
| | - Karla J Hutt
- Department of Anatomy and Developmental Biology, Biomedicine Discovery Institute, Monash University, Clayton, VIC, 3800, Australia.
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14
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Leem J, Kim JS, Oh JS. Oocytes can repair DNA damage during meiosis via a microtubule-dependent recruitment of CIP2A-MDC1-TOPBP1 complex from spindle pole to chromosomes. Nucleic Acids Res 2023; 51:4899-4913. [PMID: 36999590 PMCID: PMC10250218 DOI: 10.1093/nar/gkad213] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 03/06/2023] [Accepted: 03/13/2023] [Indexed: 04/01/2023] Open
Abstract
Because DNA double-strand breaks (DSBs) greatly threaten genomic integrity, effective DNA damage sensing and repair are essential for cellular survival in all organisms. However, DSB repair mainly occurs during interphase and is repressed during mitosis. Here, we show that, unlike mitotic cells, oocytes can repair DSBs during meiosis I through microtubule-dependent chromosomal recruitment of the CIP2A-MDC1-TOPBP1 complex from spindle poles. After DSB induction, we observed spindle shrinkage and stabilization, as well as BRCA1 and 53BP1 recruitment to chromosomes and subsequent DSB repair during meiosis I. Moreover, p-MDC1 and p-TOPBP1 were recruited from spindle poles to chromosomes in a CIP2A-dependent manner. This pole-to-chromosome relocation of the CIP2A-MDC1-TOPBP1 complex was impaired not only by depolymerizing microtubules but also by depleting CENP-A or HEC1, indicating that the kinetochore/centromere serves as a structural hub for microtubule-dependent transport of the CIP2A-MDC1-TOPBP1 complex. Mechanistically, DSB-induced CIP2A-MDC1-TOPBP1 relocation is regulated by PLK1 but not by ATM activity. Our data provide new insights into the critical crosstalk between chromosomes and spindle microtubules in response to DNA damage to maintain genomic stability during oocyte meiosis.
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Affiliation(s)
- Jiyeon Leem
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, Korea
| | - Jae-Sung Kim
- Division of Radiation Biomedical Research, Korea Institute of Radiological and Medical Sciences, Seoul, South Korea
| | - Jeong Su Oh
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, Korea
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15
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Wang X, Wang L, Xiang W. Mechanisms of ovarian aging in women: a review. J Ovarian Res 2023; 16:67. [PMID: 37024976 PMCID: PMC10080932 DOI: 10.1186/s13048-023-01151-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Accepted: 03/29/2023] [Indexed: 04/08/2023] Open
Abstract
Ovarian aging is a natural and physiological aging process characterized by loss of quantity and quality of oocyte or follicular pool. As it is generally accepted that women are born with a finite follicle pool that will go through constant decline without renewing, which, together with decreased oocyte quality, makes a severe situation for women who is of advanced age but desperate for a healthy baby. The aim of our review was to investigate mechanisms leading to ovarian aging by discussing both extra- and intra- ovarian factors and to identify genetic characteristics of ovarian aging. The mechanisms were identified as both extra-ovarian alternation of hypothalamic-pituitary-ovarian axis and intra-ovarian alternation of ovary itself, including telomere, mitochondria, oxidative stress, DNA damage, protein homeostasis, aneuploidy, apoptosis and autophagy. Moreover, here we reviewed related Genome-wide association studies (GWAS studies) from 2009 to 2021 and next generation sequencing (NGS) studies of primary ovarian insufficiency (POI) in order to describe genetic characteristics of ovarian aging. It is reasonable to wish more reliable anti-aging interventions for ovarian aging as the exploration of mechanisms and genetics being progressing.
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Affiliation(s)
- Xiangfei Wang
- Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Lingjuan Wang
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Wenpei Xiang
- Institute of Reproductive Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China.
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16
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Goetten ALF, Koch J, Rocha CC, Mezzalira A, Price CA, Portela VM, Barreta MH. Expression profile of key genes involved in DNA repair mechanisms in bovine cumulus cells cultured with bovine serum albumin or fetal calf serum. Reprod Biol 2023; 23:100709. [PMID: 36403532 DOI: 10.1016/j.repbio.2022.100709] [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: 12/14/2020] [Revised: 10/20/2022] [Accepted: 11/04/2022] [Indexed: 11/18/2022]
Abstract
Cumulus cells from cumulus-oocyte complexes (COC) matured in vitro in serum-free medium show high incidence of apoptosis and DNA double-strand breaks (DSB). This study aimed to characterize the transcript expression profile of selected genes involved in DNA repair mechanisms in bovine cumulus cells cultured with bovine serum albumin (BSA) or fetal calf serum (FCS). Briefly, bovine cumulus-oocyte complexes were in vitro matured with either, 0.4% BSA or 10% FCS for 3, 6, 12 or 24 h. The total RNA of cumulus cells was used for real-time PCR analysis. Transcript abundance of XRCC6, XRCC5, DNAPK, GAAD45B, TP53BP1, RAD50, RAD52, ATM and BRCA2 target genes changed as the IVM proceeded (P < 0.05). However, an interaction between protein source (FCS or BSA) and time was not detected (P ≥ 0.05). Cumulus cells from COCs matured with BSA presented higher mRNA expression of two genes compared to FCS group: TP53BP1 at 6 h and BRCA1 at 3, 6, 12 and 24 h (P < 0.05). In summary, our results showed for the first time the expression profile of the key genes involved in DSB repair mechanisms in cumulus cells obtained from bovine COCs matured with FCS or BSA. The higher mRNA expression of BRCA1 and TP53BP1 and lower mRNA expression of TNFAIP6 suggests an increase in apoptosis rate and DNA damage in cumulus cells cultured in BSA-supplemented medium and may explain, at least to some extent, the reduced developmental potential of bovine oocytes matured in serum-free medium.
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Affiliation(s)
| | - Júlia Koch
- Centro de Ciências Rurais, Universidade Federal de Santa Catarina (UFSC), Curitibanos, SC, Brazil
| | | | - Alceu Mezzalira
- Laboratório de Reprodução Animal Assis Roberto de Bem, Centro de Ciências Agroveterinárias (CAV), Universidade do Estado de Santa Catarina (UDESC), Lages, SC, Brazil
| | - Christopher Allan Price
- Centre de Recherche en Reproduction Animale, Faculté de Médecine Vétérinaire, Université de Montréal, St-Hyacinthe, Quebec, Canada
| | - Valério Marques Portela
- Laboratório de Biotecnologia e Reprodução Animal (BIOREP), Universidade Federal de Santa Maria (UFSM), Santa Maria, RS, Brazil
| | - Marcos Henrique Barreta
- Centro de Ciências Rurais, Universidade Federal de Santa Catarina (UFSC), Curitibanos, SC, Brazil.
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17
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Charalambous C, Webster A, Schuh M. Aneuploidy in mammalian oocytes and the impact of maternal ageing. Nat Rev Mol Cell Biol 2023; 24:27-44. [PMID: 36068367 DOI: 10.1038/s41580-022-00517-3] [Citation(s) in RCA: 45] [Impact Index Per Article: 45.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/05/2022] [Indexed: 11/09/2022]
Abstract
During fertilization, the egg and the sperm are supposed to contribute precisely one copy of each chromosome to the embryo. However, human eggs frequently contain an incorrect number of chromosomes - a condition termed aneuploidy, which is much more prevalent in eggs than in either sperm or in most somatic cells. In turn, aneuploidy in eggs is a leading cause of infertility, miscarriage and congenital syndromes. Aneuploidy arises as a consequence of aberrant meiosis during egg development from its progenitor cell, the oocyte. In human oocytes, chromosomes often segregate incorrectly. Chromosome segregation errors increase in women from their mid-thirties, leading to even higher levels of aneuploidy in eggs from women of advanced maternal age, ultimately causing age-related infertility. Here, we cover the two main areas that contribute to aneuploidy: (1) factors that influence the fidelity of chromosome segregation in eggs of women from all ages and (2) factors that change in response to reproductive ageing. Recent discoveries reveal new error-causing pathways and present a framework for therapeutic strategies to extend the span of female fertility.
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Affiliation(s)
- Chloe Charalambous
- Department of Meiosis, Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany
| | - Alexandre Webster
- Department of Meiosis, Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany
| | - Melina Schuh
- Department of Meiosis, Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany.
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18
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Lee C, Leem J, Oh JS. Selective utilization of non-homologous end-joining and homologous recombination for DNA repair during meiotic maturation in mouse oocytes. Cell Prolif 2022; 56:e13384. [PMID: 36564861 PMCID: PMC10068936 DOI: 10.1111/cpr.13384] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Revised: 11/29/2022] [Accepted: 12/08/2022] [Indexed: 12/25/2022] Open
Abstract
DNA double-strand breaks (DSBs) are highly toxic lesions that can cause genomic instability and can be repaired by non-homologous end-joining (NHEJ) and homologous recombination (HR) pathways. Despite extensive studies about DSB repair pathways, the roles of each pathway during meiotic maturation in oocytes are not well understood. Here we show that oocytes selectively utilize NHEJ and HR to repair DSBs during meiotic maturation. Inhibition of NHEJ impaired the meiotic maturation of oocytes with DNA damage by activating the spindle assembly checkpoint (SAC) with a concomitant increase in metaphase I (MI) arrest and DNA damage levels. In contrast, oocytes with DNA damage bypassed SAC-mediated MI arrest despite the presence of fragmented DNA when HR was inhibited. Notably, this bypass of SAC arrest by HR inhibition was associated with a loss of centromere integrity and subsequent impairment of chromosome architecture. Our results demonstrate that, while NHEJ is critical for the meiotic maturation of oocytes with DNA damage, HR is essential to maintain centromere integrity against DNA damage during meiotic maturation, revealing distinct roles of NHEJ and HR during meiotic maturation in mouse oocytes.
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Affiliation(s)
- Crystal Lee
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, South Korea
| | - Jiyeon Leem
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, South Korea
| | - Jeong Su Oh
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, South Korea.,Biomedical Institute for Convergence at SKKU (BICS), Sungkyunkwan University, Suwon, South Korea
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19
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Cao Y, Wang Z, Zhang C, Bian Y, Zhang X, Liu X, Chen W, Zhao Y. Metformin promotes in vitro maturation of oocytes from aged mice by attenuating mitochondrial oxidative stress via SIRT3-dependent SOD2ac. Front Cell Dev Biol 2022; 10:1028510. [PMID: 36393869 PMCID: PMC9640937 DOI: 10.3389/fcell.2022.1028510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2022] [Accepted: 10/10/2022] [Indexed: 11/30/2022] Open
Abstract
Human female fecundity decreases irreversibly as chronological age rises, adversely affecting oocyte quality, consequently worsening pregnancy outcomes and increasing the extent of birth defects. The first-line type 2 diabetes treatment metformin has been associated with delayed aging and reduction of oxidative stress; yet it remains unclear if metformin confers any benefits for oocytes from aged mice, particularly in the context of the assisted human reproductive technology (ART) known as in vitro maturation (IVM). Here, we found that adding metformin into the M16 culture medium of oocytes from aged mice significantly improved both oocyte maturation and early embryonic development. This study showed that metformin reduced the extent of meiotic defects and maintained a normal distribution of cortical granules (CGs). RNA-seq analysis of metformin-treated oocytes revealed genes apparently involved in the reduction of mitochondrial ROS. Further, the results supported that the metformin improved mitochondrial function, reduced apoptosis, increased the extent of autophagy, and reduced mitochondrial ROS via SIRT3-mediated acetylation status of SOD2K68 in oocytes from aged mice. Thus, this finding demonstrated a protective effect for metformin against the decreased quality of oocytes from aged mice to potentially improve ART success rates and illustrated a potential strategy to prevent or delay reproductive aging.
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Affiliation(s)
- Yongzhi Cao
- Center for Reproductive Medicine, Shandong University, Jinan, Shandong, China,Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, Shandong, China,Shandong Key Laboratory of Reproductive Medicine, Jinan, Shandong, China,Shandong Provincial Clinical Research Center for Reproductive Health, Jinan, Shandong, China,Shandong Technology Innovation Center for Reproductive Health, Jinan, Shandong, China,National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Shandong University, Jinan, Shandong, China,Laboratory Animal Center, Shandong University, Jinan, Shandong, China
| | - Zhao Wang
- Center for Reproductive Medicine, Shandong University, Jinan, Shandong, China,Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, Shandong, China,Shandong Key Laboratory of Reproductive Medicine, Jinan, Shandong, China,Shandong Provincial Clinical Research Center for Reproductive Health, Jinan, Shandong, China,Shandong Technology Innovation Center for Reproductive Health, Jinan, Shandong, China,National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Shandong University, Jinan, Shandong, China
| | - Changming Zhang
- Center for Reproductive Medicine, Shandong University, Jinan, Shandong, China,Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, Shandong, China,Shandong Key Laboratory of Reproductive Medicine, Jinan, Shandong, China,Shandong Provincial Clinical Research Center for Reproductive Health, Jinan, Shandong, China,Shandong Technology Innovation Center for Reproductive Health, Jinan, Shandong, China,National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Shandong University, Jinan, Shandong, China
| | - Yuehong Bian
- Center for Reproductive Medicine, Shandong University, Jinan, Shandong, China,Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, Shandong, China,Shandong Key Laboratory of Reproductive Medicine, Jinan, Shandong, China,Shandong Provincial Clinical Research Center for Reproductive Health, Jinan, Shandong, China,Shandong Technology Innovation Center for Reproductive Health, Jinan, Shandong, China,National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Shandong University, Jinan, Shandong, China
| | - Xin Zhang
- Center for Reproductive Medicine, Shandong University, Jinan, Shandong, China,Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, Shandong, China,Shandong Key Laboratory of Reproductive Medicine, Jinan, Shandong, China,Shandong Provincial Clinical Research Center for Reproductive Health, Jinan, Shandong, China,Shandong Technology Innovation Center for Reproductive Health, Jinan, Shandong, China,National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Shandong University, Jinan, Shandong, China
| | - Xin Liu
- Center for Reproductive Medicine, Shandong University, Jinan, Shandong, China,Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, Shandong, China,Shandong Key Laboratory of Reproductive Medicine, Jinan, Shandong, China,Shandong Provincial Clinical Research Center for Reproductive Health, Jinan, Shandong, China,Shandong Technology Innovation Center for Reproductive Health, Jinan, Shandong, China,National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Shandong University, Jinan, Shandong, China
| | - Wendi Chen
- Center for Reproductive Medicine, Shandong University, Jinan, Shandong, China,Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, Shandong, China,Shandong Key Laboratory of Reproductive Medicine, Jinan, Shandong, China,Shandong Provincial Clinical Research Center for Reproductive Health, Jinan, Shandong, China,Shandong Technology Innovation Center for Reproductive Health, Jinan, Shandong, China,National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Shandong University, Jinan, Shandong, China
| | - Yueran Zhao
- Center for Reproductive Medicine, Shandong University, Jinan, Shandong, China,Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, Shandong, China,Shandong Key Laboratory of Reproductive Medicine, Jinan, Shandong, China,Shandong Provincial Clinical Research Center for Reproductive Health, Jinan, Shandong, China,Shandong Technology Innovation Center for Reproductive Health, Jinan, Shandong, China,National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Shandong University, Jinan, Shandong, China,Central Laboratory, Shandong Provincial Hospital, Shandong University, Jinan, Shandong, China,*Correspondence: Yueran Zhao,
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20
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Lu PS, Wang Y, Jiao L, Sun SC. Nivalenol affects Cyclin B1 level and activates SAC for cell cycle progression in mouse oocyte meiosis. Cell Prolif 2022; 55:e13277. [PMID: 35746834 PMCID: PMC9436911 DOI: 10.1111/cpr.13277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Revised: 05/02/2022] [Accepted: 05/17/2022] [Indexed: 11/03/2022] Open
Abstract
OBJECTIVES Nivalenol (NIV) is a secondary metabolite of type B trichothecene mycotoxin produced by Fusarium genera, which is widely found in contaminated food and crops such as corn, wheat and peanuts. NIV is reported to have hepatotoxicity, immunotoxicity, genotoxicity, and reproductive toxicity. Previous studies indicate that NIV disturbs mammalian oocyte maturation. Here, we reported that delayed cell cycle progression might be the reason for oocyte maturation defect caused by NIV exposure. METHODS AND RESULTS We set up a NIV exposure model and showed that NIV did not affect G2/M transition for meiosis resumption, but disrupted the polar body extrusion of oocytes. Further analysis revealed that oocytes were arrested at metaphase I, which might be due to the lower expression of Cyclin B1 after NIV exposure. After cold treatment, the microtubules were disassembled in the NIV-exposed oocytes, indicating that NIV disrupted microtubule stability. Moreover, NIV affected the attachment between kinetochore and microtubules, which further induced the activation of MAD2/BUBR1 at the kinetochores, suggesting that spindle assemble checkpoint (SAC) was continuously activated during oocyte meiotic maturation. CONCLUSIONS Taken together, our study demonstrated that exposure to NIV affected Cyclin B1 expression and activated microtubule stability-dependent SAC to ultimately disturb cell cycle progression in mouse oocyte meiosis.
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Affiliation(s)
- Ping-Shuang Lu
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Yue Wang
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Le Jiao
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Shao-Chen Sun
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
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21
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Gasic S, Mihola O, Trachtulec Z. Prdm9 deficiency of rat oocytes causes synapsis among non-homologous chromosomes and aneuploidy. Mamm Genome 2022; 33:590-605. [PMID: 35596034 DOI: 10.1007/s00335-022-09954-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Accepted: 04/28/2022] [Indexed: 10/18/2022]
Abstract
Aneuploidy (abnormal chromosome number) accompanies reduced ovarian function in humans and mice, but the reasons behind this concomitance remain underexplored. Some variants in the human gene encoding histone-3-lysine-4,36-trimethyltransferase PRDM9 are associated with aneuploidy, and other variants with ovarian function reduced by premature ovarian failure (POF), but no link between POF and aneuploidy has been revealed. SHR/OlaIpcv rat females lacking PRDM9 manifest POF-a reduced follicle number, litter size, and reproductive age. Here, we explored this model to test how POF relates to oocyte euploidy. The mutant rat females displayed increased oocyte aneuploidy and embryonic death of their offspring compared to controls. Because rat PRDM9 positions meiotic DNA breaks, we investigated the repair of these breaks. Fertile control rodents carry pachytene oocytes with synapsed homologous chromosomes and repaired breaks, while sterile Prdm9-deficient mice carry pachytene-like oocytes with many persisting breaks and asynapsed chromosomes. However, most PRDM9-lacking rat oocytes displayed a few persisting breaks and non-homologous synapsis (NHS). HORMAD2 protein serves as a barrier to sister-chromatid repair and a signal for the synapsis and DNA repair checkpoints. NHS but not asynapsis was associated with HORMAD2 levels similar to the levels on rat pachytene chromosomes with homologous synapsis. NHS was accompanied by crossing-over decreased below the minimum that is essential for euploidy. We argue that the increased mutant rat aneuploidy is due to NHS, which allows some oocytes to pass meiotic checkpoints without one crossing-over per chromosomal pair, leading to segregation errors, and thereby NHS links POF to aneuploidy.
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Affiliation(s)
- Srdjan Gasic
- Laboratory of Germ Cell Development, Division BIOCEV, Institute of Molecular Genetics of the Czech Academy of Sciences, Prague, Czech Republic
| | - Ondrej Mihola
- Laboratory of Germ Cell Development, Division BIOCEV, Institute of Molecular Genetics of the Czech Academy of Sciences, Prague, Czech Republic
| | - Zdenek Trachtulec
- Laboratory of Germ Cell Development, Division BIOCEV, Institute of Molecular Genetics of the Czech Academy of Sciences, Prague, Czech Republic.
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22
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Fu TY, Wang SH, Lin TY, Shen PC, Chang SC, Lin YH, Chou CJ, Yu YH, Yang KT, Huang CW, Shaw SW, Peng SY. The Exploration of miRNAs From Porcine Fallopian Tube Stem Cells on Porcine Oocytes. Front Vet Sci 2022; 9:869217. [PMID: 35615247 PMCID: PMC9125035 DOI: 10.3389/fvets.2022.869217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Accepted: 04/07/2022] [Indexed: 11/16/2022] Open
Abstract
Fallopian tube is essential to fertilization and embryonic development. Extracellular vesicles (EVs) from Fallopian tube containing biological regulatory factors, such as lipids, proteins and microRNAs (miRNAs) serve as the key role. At present, studies on oocytes from porcine oviduct and components from EVs remain limited. We aim to explore the effect of EVs secreted by porcine fallopian tube stem cells (PFTSCs) on oocyte. When the fifth-generation PFTSCs reached 80–90% of confluency, the pig in vitro maturation medium was utilized, and the conditioned medium collected for oocyte incubations. To realize the functions of EVs, several proteins were used to determine whether extracted EVs were cell-free. Field emission scanning electron microscope and nanoparticle tracking analyzer were used to observe the morphology. By next generation sequencing, 267 miRNAs were identified, and those with higher expression were selected to analyze the Gene Ontology and Kyoto Encyclopedia of Genes and Genomes pathway enrichment maps. The selected miR-152-3p, miR-148a-3p, miR-320a-3p, let-7f-5p, and miR-22-3p, were predicted to target Cepb1 gene affecting MAPK pathway. Of the five miRNAs, miR-320a-3p showed significant difference in maturation rate in vitro maturation. The blastocyst rate of pig embryos was also significantly enhanced by adding 50 nM miR-320a-3p. In vitro culture with miR-320a-3p, the blastocyst rate was significantly higher, but the cleavage rate and cell numbers were not. The CM of PFTSCs effectively improves porcine oocyte development. The miRNAs in EVs are sequenced and identified. miR-320a-3p not only helps the maturation, but also increases the blastocyst rates.
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Affiliation(s)
- Tzu-Yen Fu
- Department of Animal Science, National Pingtung University of Science and Technology, Pingtung, Taiwan
| | - Shu-Hsuan Wang
- Department of Animal Science, National Pingtung University of Science and Technology, Pingtung, Taiwan
| | - Tzu-Yi Lin
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Perng-Chih Shen
- Department of Animal Science, National Pingtung University of Science and Technology, Pingtung, Taiwan
| | - Shen-Chang Chang
- Kaohsiung Animal Propagation Station, Livestock Research Institute, Council of Agriculture, Executive Yuan, Pingtung, Taiwan
| | - Yu-Han Lin
- Department of Animal Science, National Pingtung University of Science and Technology, Pingtung, Taiwan
| | - Chih-Jen Chou
- Institute of Biotechnology, National Taiwan University, Taipei, Taiwan
| | - Yu-Hsiang Yu
- Department of Biotechnology and Animal Science, National Ilan University, Yilan, Taiwan
| | - Kuo-Tai Yang
- Department of Animal Science, National Pingtung University of Science and Technology, Pingtung, Taiwan
| | - Chao-Wei Huang
- Department of Tropical Agriculture and International Cooperation, National Pingtung University of Science and Technology, Pingtung, Taiwan
| | - Steven W. Shaw
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
- Department of Obstetrics and Gynecology, Taipei Chang Gung Memorial Hospital, Taipei, Taiwan
- Prenatal Cell and Gene Therapy Group, Institute for Women's Health, University College London, London, United Kingdom
- *Correspondence: Steven W. Shaw
| | - Shao-Yu Peng
- Department of Animal Science, National Pingtung University of Science and Technology, Pingtung, Taiwan
- Shao-Yu Peng
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23
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Leem J, Oh JS. MDC1 is essential for G2/M transition and spindle assembly in mouse oocytes. Cell Mol Life Sci 2022; 79:200. [PMID: 35320416 PMCID: PMC11071937 DOI: 10.1007/s00018-022-04241-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2022] [Revised: 02/23/2022] [Accepted: 03/09/2022] [Indexed: 11/28/2022]
Abstract
Mammalian oocytes are particularly susceptible to accumulating DNA damage. However, unlike mitotic cells in which DNA damage induces G2 arrest by activating the ATM-Chk1/2-Cdc25 pathway, oocytes readily enter M-phase immediately following DNA damage. This implies a lack of a robust canonical G2/M DNA damage checkpoint in oocytes. Here we show that MDC1 plays a non-canonical role in controlling G2/M transition by regulating APC/C-Cdh1-mediated cyclin B1 degradation in response to DNA damage in mouse oocytes. Depletion of MDC1 impaired M-phase entry by decreasing cyclin B1 levels via the APC/C-Cdh1 pathway. Notably, the APC/C-Cdh1 regulation mediated by MDC1 was achieved by a direct interaction between MDC1 and APC/C-Cdh1. This interaction was transiently disrupted after DNA damage with a concomitant increase in Cdh1 levels, which, in turn, decreased cyclin B1 levels and delayed M-phase entry. Moreover, MDC1 depletion impaired spindle assembly by decreasing the integrity of microtubule organizing centers (MTOCs). Therefore, our results demonstrate that MDC1 is an essential molecule in regulating G2/M transition in response to DNA damage and in regulating spindle assembly in mouse oocytes. These results provide new insights into the regulation of the G2/M DNA damage checkpoint and cell cycle control in oocytes.
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Affiliation(s)
- Jiyeon Leem
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, Korea
| | - Jeong Su Oh
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, Korea.
- Biomedical Institute for Convergence at SKKU (BICS), Sungkyunkwan University, Suwon, Korea.
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24
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Ozturk S. Molecular determinants of the meiotic arrests in mammalian oocytes at different stages of maturation. Cell Cycle 2022; 21:547-571. [PMID: 35072590 PMCID: PMC8942507 DOI: 10.1080/15384101.2022.2026704] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 12/21/2021] [Accepted: 01/03/2022] [Indexed: 01/26/2023] Open
Abstract
Mammalian oocytes undergo two rounds of developmental arrest during maturation: at the diplotene of the first meiotic prophase and metaphase of the second meiosis. These arrests are strictly regulated by follicular cells temporally producing the secondary messengers, cAMP and cGMP, and other factors to regulate maturation promoting factor (composed of cyclin B1 and cyclin-dependent kinase 1) levels in the oocytes. Out of these normally appearing developmental arrests, permanent arrests may occur in the oocytes at germinal vesicle (GV), metaphase I (MI), or metaphase II (MII) stage. This issue may arise from absence or altered expression of the oocyte-related genes playing key roles in nuclear and cytoplasmic maturation. Additionally, the assisted reproductive technology (ART) applications such as ovarian stimulation and in vitro culture conditions both of which harbor various types of chemical agents may contribute to forming the permanent arrests. In this review, the molecular determinants of developmental and permanent arrests occurring in the mammalian oocytes are comprehensively evaluated in the light of current knowledge. As number of permanently arrested oocytes at different stages is increasing in ART centers, potential approaches for inducing permanent arrests to obtain competent oocytes are discussed.
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Affiliation(s)
- Saffet Ozturk
- Department of Histology and Embryology, Akdeniz University School of Medicine, Antalya, Turkey
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25
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Bebbere D, Coticchio G, Borini A, Ledda S. Oocyte aging: looking beyond chromosome segregation errors. J Assist Reprod Genet 2022; 39:793-800. [PMID: 35212880 PMCID: PMC9051005 DOI: 10.1007/s10815-022-02441-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Accepted: 02/18/2022] [Indexed: 11/30/2022] Open
Abstract
The age-associated decline in female fertility is largely ascribable to a decrease in oocyte quality. This phenomenon is multifaceted and influenced by numerous interconnected maternal and environmental factors. An increase in the rate of meiotic errors is the major cause of the decline in oocyte developmental competence. However, abnormalities in the ooplasm accumulating with age - including altered metabolism, organelle dysfunction, and aberrant gene regulation - progressively undermine oocyte quality. Stockpiling of maternal macromolecules during folliculogenesis is crucial, as oocyte competence to achieve maturation, fertilization, and the earliest phases of embryo development occur in absence of transcription. At the same time, crucial remodeling of oocyte epigenetics during oogenesis is potentially exposed to interfering factors, such as assisted reproduction technologies (ARTs) or environmental changes, whose impact may be enhanced by reproductive aging. As the effects of maternal aging on molecular mechanisms governing the function of the human oocyte remain poorly understood, studies in animal models are essential to deepen current understanding, with translational implications for human ARTs. The present mini review aims at offering an updated and consistent view of cytoplasmic alterations occurring in oocytes during aging, focusing particularly on gene and epigenetic regulation. Appreciation of these mechanisms could inspire solutions to mitigate/control the phenomenon, and thus benefit modern ARTs.
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Affiliation(s)
- Daniela Bebbere
- Department of Veterinary Medicine, University of Sassari, Sassari, Italy.
| | | | | | - Sergio Ledda
- Department of Veterinary Medicine, University of Sassari, Sassari, Italy
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26
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Pailas A, Niaka K, Zorzompokou C, Marangos P. The DNA Damage Response in Fully Grown Mammalian Oocytes. Cells 2022; 11:cells11050798. [PMID: 35269420 PMCID: PMC8909749 DOI: 10.3390/cells11050798] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 02/09/2022] [Accepted: 02/17/2022] [Indexed: 11/16/2022] Open
Abstract
DNA damage in cells can occur physiologically or may be induced by exogenous factors. Genotoxic damage may cause cancer, ageing, serious developmental diseases and anomalies. If the damage occurs in the germline, it can potentially lead to infertility or chromosomal and genetic aberrations in the developing embryo. Mammalian oocytes, the female germ cells, are produced before birth, remaining arrested at the prophase stage of meiosis over a long period of time. During this extensive state of arrest the oocyte may be exposed to different DNA-damaging insults for months, years or even decades. Therefore, it is of great importance to understand how these cells respond to DNA damage. In this review, we summarize the most recent developments in the understanding of the DNA damage response mechanisms that function in fully grown mammalian oocytes.
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Affiliation(s)
- Alexandros Pailas
- Department of Biological Applications and Technology, School of Health Sciences, Institute of Biosciences, University Research Centre, University of Ioannina, 45110 Ioannina, Greece
| | - Konstantina Niaka
- Department of Biological Applications and Technology, School of Health Sciences, Institute of Biosciences, University Research Centre, University of Ioannina, 45110 Ioannina, Greece
| | - Chrysoula Zorzompokou
- Department of Biological Applications and Technology, School of Health Sciences, Institute of Biosciences, University Research Centre, University of Ioannina, 45110 Ioannina, Greece
| | - Petros Marangos
- Department of Biological Applications and Technology, School of Health Sciences, Institute of Biosciences, University Research Centre, University of Ioannina, 45110 Ioannina, Greece
- Biomedical Research Institute, Foundation for Research and Technology, University of Ioannina Campus, 45115 Ioannina, Greece
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27
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Zhang J, Yuan HJ, Zhu J, Gong S, Luo MJ, Tan JH. Topoisomerase II dysfunction causes metaphase I arrest by activating aurora B, SAC and MPF and prevents PB1 abscission in mouse oocytes†. Biol Reprod 2022; 106:900-909. [PMID: 35084021 DOI: 10.1093/biolre/ioac011] [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: 03/27/2021] [Revised: 11/02/2021] [Accepted: 01/13/2022] [Indexed: 11/14/2022] Open
Abstract
Oocyte aneuploidy is caused mainly by chromosome nondisjunction and/or unbalanced sister chromatid pre-division. Although studies in somatic cells have shown that topoisomerase II (TOP2) plays important roles in chromosome condensation and timely separation of centromeres, little is known about its role during oocyte meiosis. Furthermore, because VP-16, which is a TOP2 inhibitor and induces DNA double strand breaks, is often used for ovarian cancer chemotherapy, its effects on oocytes must be studied for ovarian cancer patients to recover ovarian function following chemotherapy. This study showed that inhibiting TOP2 with either ICRF-193 or VP-16 during meiosis I impaired chromatin condensation, chromosome alignment, TOP2α localization and caused metaphase I (MI) arrest and first polar body (PB1) abscission failure. Inhibiting or neutralizing either spindle assembly checkpoint (SAC), Aurora B or maturation-promoting factor (MPF) significantly abolished the effect of ICRF-193 or VP-16 on MI arrest. Treatment with ICRF-193 or VP-16 significantly activated MPF and SAC but the effect disappeared when Aurora B was inhibited. Most of the oocytes matured in the presence of ICRF-193 or VP-16 were arrested at MI, and only 11% to 27% showed PB1 protrusion. Furthermore, most of the PB1 protrusions formed in the presence of ICRF-193 or VP-16 were retracted after further culture for 7 h. In conclusion, TOP2 dysfunction causes MI arrest by activating Aurora B, SAC and MPF and it prevents PB1 abscission by promoting chromatin bridges.
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Affiliation(s)
- Jie Zhang
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an City 271018, P. R. China
| | - Hong-Jie Yuan
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an City 271018, P. R. China
| | - Jiang Zhu
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an City 271018, P. R. China
| | - Shuai Gong
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an City 271018, P. R. China
| | - Ming-Jiu Luo
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an City 271018, P. R. China
| | - Jing-He Tan
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an City 271018, P. R. China
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28
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Yang H, Kolben T, Kessler M, Meister S, Paul C, van Dorp J, Eren S, Kuhn C, Rahmeh M, Herbst C, Fink SG, Weimer G, Mahner S, Jeschke U, von Schönfeldt V. FAM111A Is a Novel Molecular Marker for Oocyte Aging. Biomedicines 2022; 10:257. [PMID: 35203468 PMCID: PMC8869572 DOI: 10.3390/biomedicines10020257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Revised: 01/12/2022] [Accepted: 01/17/2022] [Indexed: 11/17/2022] Open
Abstract
Aging is the main cause of decline in oocyte quality, which can further trigger the failure of assisted reproductive technology (ART). Exploring age-related genes in oocytes is an important way to investigate the molecular mechanisms involved in oocyte aging. To provide novel insight into this field, we performed a pooled analysis of publicly available datasets, using the overlapping results of two statistical methods on two Gene Expression Omnibus (GEO) datasets. The methods utilized in the current study mainly include Spearman rank correlation, the Wilcoxon signed-rank test, t-tests, Venn diagrams, Gene Ontology (GO), Protein-Protein Interaction (PPI), Gene Set Enrichment Analysis (GSEA), Gene Set Variation Analysis (GSVA), and receiver operating characteristic (ROC) curve analysis. We identified hundreds of age-related genes across different gene expression datasets of in vitro maturation-metaphase II (IVM-MII) oocytes. Age-related genes in IVM-MII oocytes were involved in the biological processes of cellular metabolism, DNA replication, and histone modifications. Among these age-related genes, FAM111A expression presented a robust correlation with age, seen in the results of different statistical methods and different datasets. FAM111A is associated with the processes of chromosome segregation and cell cycle regulation. Thus, this enzyme is potentially an interesting novel marker for the aging of oocytes, and warrants further mechanistic study.
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Affiliation(s)
- Huixia Yang
- Department of Obstetrics and Gynecology, University Hospital, Ludwig-Maximilians-University, 81377 Munich, Germany; (H.Y.); (T.K.); (M.K.); (S.M.); (C.P.); (J.v.D.); (S.E.); (C.K.); (M.R.); (C.H.); (S.G.F.); (G.W.); (S.M.); (V.v.S.)
| | - Thomas Kolben
- Department of Obstetrics and Gynecology, University Hospital, Ludwig-Maximilians-University, 81377 Munich, Germany; (H.Y.); (T.K.); (M.K.); (S.M.); (C.P.); (J.v.D.); (S.E.); (C.K.); (M.R.); (C.H.); (S.G.F.); (G.W.); (S.M.); (V.v.S.)
| | - Mirjana Kessler
- Department of Obstetrics and Gynecology, University Hospital, Ludwig-Maximilians-University, 81377 Munich, Germany; (H.Y.); (T.K.); (M.K.); (S.M.); (C.P.); (J.v.D.); (S.E.); (C.K.); (M.R.); (C.H.); (S.G.F.); (G.W.); (S.M.); (V.v.S.)
| | - Sarah Meister
- Department of Obstetrics and Gynecology, University Hospital, Ludwig-Maximilians-University, 81377 Munich, Germany; (H.Y.); (T.K.); (M.K.); (S.M.); (C.P.); (J.v.D.); (S.E.); (C.K.); (M.R.); (C.H.); (S.G.F.); (G.W.); (S.M.); (V.v.S.)
| | - Corinna Paul
- Department of Obstetrics and Gynecology, University Hospital, Ludwig-Maximilians-University, 81377 Munich, Germany; (H.Y.); (T.K.); (M.K.); (S.M.); (C.P.); (J.v.D.); (S.E.); (C.K.); (M.R.); (C.H.); (S.G.F.); (G.W.); (S.M.); (V.v.S.)
| | - Julia van Dorp
- Department of Obstetrics and Gynecology, University Hospital, Ludwig-Maximilians-University, 81377 Munich, Germany; (H.Y.); (T.K.); (M.K.); (S.M.); (C.P.); (J.v.D.); (S.E.); (C.K.); (M.R.); (C.H.); (S.G.F.); (G.W.); (S.M.); (V.v.S.)
| | - Sibel Eren
- Department of Obstetrics and Gynecology, University Hospital, Ludwig-Maximilians-University, 81377 Munich, Germany; (H.Y.); (T.K.); (M.K.); (S.M.); (C.P.); (J.v.D.); (S.E.); (C.K.); (M.R.); (C.H.); (S.G.F.); (G.W.); (S.M.); (V.v.S.)
| | - Christina Kuhn
- Department of Obstetrics and Gynecology, University Hospital, Ludwig-Maximilians-University, 81377 Munich, Germany; (H.Y.); (T.K.); (M.K.); (S.M.); (C.P.); (J.v.D.); (S.E.); (C.K.); (M.R.); (C.H.); (S.G.F.); (G.W.); (S.M.); (V.v.S.)
- Department of Obstetrics and Gynecology, University Hospital Augsburg, 86156 Augsburg, Germany
| | - Martina Rahmeh
- Department of Obstetrics and Gynecology, University Hospital, Ludwig-Maximilians-University, 81377 Munich, Germany; (H.Y.); (T.K.); (M.K.); (S.M.); (C.P.); (J.v.D.); (S.E.); (C.K.); (M.R.); (C.H.); (S.G.F.); (G.W.); (S.M.); (V.v.S.)
| | - Cornelia Herbst
- Department of Obstetrics and Gynecology, University Hospital, Ludwig-Maximilians-University, 81377 Munich, Germany; (H.Y.); (T.K.); (M.K.); (S.M.); (C.P.); (J.v.D.); (S.E.); (C.K.); (M.R.); (C.H.); (S.G.F.); (G.W.); (S.M.); (V.v.S.)
| | - Sabine Gabriele Fink
- Department of Obstetrics and Gynecology, University Hospital, Ludwig-Maximilians-University, 81377 Munich, Germany; (H.Y.); (T.K.); (M.K.); (S.M.); (C.P.); (J.v.D.); (S.E.); (C.K.); (M.R.); (C.H.); (S.G.F.); (G.W.); (S.M.); (V.v.S.)
| | - Gabriele Weimer
- Department of Obstetrics and Gynecology, University Hospital, Ludwig-Maximilians-University, 81377 Munich, Germany; (H.Y.); (T.K.); (M.K.); (S.M.); (C.P.); (J.v.D.); (S.E.); (C.K.); (M.R.); (C.H.); (S.G.F.); (G.W.); (S.M.); (V.v.S.)
| | - Sven Mahner
- Department of Obstetrics and Gynecology, University Hospital, Ludwig-Maximilians-University, 81377 Munich, Germany; (H.Y.); (T.K.); (M.K.); (S.M.); (C.P.); (J.v.D.); (S.E.); (C.K.); (M.R.); (C.H.); (S.G.F.); (G.W.); (S.M.); (V.v.S.)
| | - Udo Jeschke
- Department of Obstetrics and Gynecology, University Hospital, Ludwig-Maximilians-University, 81377 Munich, Germany; (H.Y.); (T.K.); (M.K.); (S.M.); (C.P.); (J.v.D.); (S.E.); (C.K.); (M.R.); (C.H.); (S.G.F.); (G.W.); (S.M.); (V.v.S.)
- Department of Obstetrics and Gynecology, University Hospital Augsburg, 86156 Augsburg, Germany
| | - Viktoria von Schönfeldt
- Department of Obstetrics and Gynecology, University Hospital, Ludwig-Maximilians-University, 81377 Munich, Germany; (H.Y.); (T.K.); (M.K.); (S.M.); (C.P.); (J.v.D.); (S.E.); (C.K.); (M.R.); (C.H.); (S.G.F.); (G.W.); (S.M.); (V.v.S.)
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29
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Buratini J, Dellaqua TT, Dal Canto M, La Marca A, Carone D, Mignini Renzini M, Webb R. The putative roles of FSH and AMH in the regulation of oocyte developmental competence: from fertility prognosis to mechanisms underlying age-related subfertility. Hum Reprod Update 2021; 28:232-254. [PMID: 34969065 DOI: 10.1093/humupd/dmab044] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 11/18/2021] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Fertility loss during female ageing is associated with increasing basal FSH and decreasing anti-Müllerian hormone (AMH) concentrations, together with compromised oocyte quality, presumably due to increased oxidative stress (OS) and DNA damage, as well as reduced metabolic and meiotic competences. Basal FSH and AMH circulatory concentrations have been broadly utilized as IVF success predictors, regardless of fluctuations in prognostic accuracy; basal FSH and AMH perform better in pre-advanced maternal age (AMA: >35 years) and AMA patients, respectively. The relationships between FSH and AMH intrafollicular levels and IVF outcomes suggest, nevertheless, that both hormones regulate oocyte competence, supporting the hypothesis that changes in FSH/AMH levels cause, at least in part, oocyte quality degradation during ageing. To understand the reasons behind the fluctuations in FSH and AMH prognostic accuracies and to clarify their participation in mechanisms determining oocyte competence and age-related subfertility, a deeper knowledge of the regulation of FSH and AMH intrafollicular signalling during the female reproductive lifespan, and of their effects on the cumulus-oocyte complex, is required. OBJECTIVE AND RATIONALE An extensive body of information on the regulation of FSH and AMH intrafollicular availability and signalling, as well as on the control of folliculogenesis and oocyte metabolism, has been accumulated. However, these datasets have been explored within the relatively narrow boundaries of their specific subjects. Given the aforementioned gaps in knowledge and their clinical relevance, herein we integrate clinical and basic data, within a wide biological perspective, aiming to shed light on (i) the reasons for the variability in the accuracy of serum FSH and AMH as fertility markers, and on (ii) the potential roles of these hormones in mechanisms regulating oocyte quality, particularly those associated with ageing. SEARCH METHODS The PubMed database encompassing the period between 1960 and 2021 was searched. Principal search terms were FSH, FSH receptor, AMH, oocyte, maternal age, cumulus, transzonal projections (TZPs), actin, OS, redox, reactive oxygen species, mitochondria, DNA damage, DNA repair, aneuploidy, spindle, meiosis, gene expression, transcription, translation, oocyte secreted factors (OSFs), cAMP, cyclic guanosine monophosphate, natriuretic peptide C, growth differentiation factor 9, bone morphogenetic protein 15 and fibroblast growth factor. OUTCOMES Our analysis suggests that variations in the accuracy of fertility prognosis reflect a modest association between circulatory AMH levels and oocyte quality as well as increasing basal FSH inter-cycle variability with age. In addition, the basic and clinical data articulated herein support the hypothesis that increased intrafollicular FSH levels, as maternal age advances, may override the physiological protective influences of AMH and OSFs against excessive FSH signalling in cumulus cells. This would result in the disruption of oocyte homeostasis via reduced TZP-mediated transfer of cumulus-derived molecules essential for meiotic competence, gene expression, redox activity and DNA repair. WIDER IMPLICATIONS In-depth data analysis, encompassing a wide biological perspective has revealed potential causative mechanisms of age-related subfertility triggered by alterations in FSH/AMH signalling during the female reproductive life. Insights from new mechanistic models arising from this analysis should contribute to advancing our comprehension of oocyte biology in humans and serve as a valuable reference for novel AMA subfertility treatments aimed at improving oocyte quality through the modulation of AMH/FSH action.
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Affiliation(s)
- Jose Buratini
- Biogenesi Reproductive Medicine Centre-Eugin Group, Istituti Clinici Zucchi, Monza, Italy.,Clinica Eugin Modena, Modena, Italy.,Department of Structural and Functional Biology, Sao Paulo State University, Botucatu, Brazil
| | - Thaisy Tino Dellaqua
- Department of Structural and Functional Biology, Sao Paulo State University, Botucatu, Brazil
| | - Mariabeatrice Dal Canto
- Biogenesi Reproductive Medicine Centre-Eugin Group, Istituti Clinici Zucchi, Monza, Italy.,Clinica Eugin Modena, Modena, Italy
| | - Antonio La Marca
- Clinica Eugin Modena, Modena, Italy.,Department of Medical and Surgical Sciences of the Mother, Children and Adults, University of Modena and Reggio Emilia, Modena, Italy
| | | | - Mario Mignini Renzini
- Biogenesi Reproductive Medicine Centre-Eugin Group, Istituti Clinici Zucchi, Monza, Italy.,Clinica Eugin Modena, Modena, Italy
| | - Robert Webb
- Division of Animal Sciences, School of Biosciences, University of Nottingham, Nottinghamshire, UK
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Hirano T, Matsuyama Y, Hanada A, Hayashi Y, Abe T, Kunitake H. DNA Damage Response of Cyrtanthus mackenii Male Gametes Following Argon Ion Beam Irradiation. CYTOLOGIA 2021. [DOI: 10.1508/cytologia.86.311] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
| | | | - Anna Hanada
- Faculty of Agriculture, University of Miyazaki
| | | | - Tomoko Abe
- Nishina Center for Accelerator-Based Science, RIKEN
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31
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Yang H, Kolben T, Meister S, Paul C, van Dorp J, Eren S, Kuhn C, Rahmeh M, Mahner S, Jeschke U, von Schönfeldt V. Factors Influencing the In Vitro Maturation (IVM) of Human Oocyte. Biomedicines 2021; 9:1904. [PMID: 34944731 PMCID: PMC8698296 DOI: 10.3390/biomedicines9121904] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Revised: 12/08/2021] [Accepted: 12/10/2021] [Indexed: 02/07/2023] Open
Abstract
In vitro maturation (IVM) of oocytes is a promising assisted reproductive technology (ART) deemed as a simple and safe procedure. It is mainly used in patients with impaired oocyte maturation and in fertility preservation for women facing the risk of losing fertility. However, to date, it is still not widely used in clinical practice because of its underperformance. The influencing factors, such as biphasic IVM system, culture medium, and the supplementation, have a marked effect on the outcomes of oocyte IVM. However, the role of different culture media, supplements, and follicular priming regimens in oocyte IVM have yet to be fully clarified and deserve further investigation.
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Affiliation(s)
- Huixia Yang
- Department of Obstetrics and Gynecology, University Hospital, Ludwig-Maximilians-University, 81377 Munich, Germany; (H.Y.); (T.K.); (S.M.); (C.P.); (J.v.D.); (S.E.); (C.K.); (M.R.); (S.M.); (V.v.S.)
| | - Thomas Kolben
- Department of Obstetrics and Gynecology, University Hospital, Ludwig-Maximilians-University, 81377 Munich, Germany; (H.Y.); (T.K.); (S.M.); (C.P.); (J.v.D.); (S.E.); (C.K.); (M.R.); (S.M.); (V.v.S.)
| | - Sarah Meister
- Department of Obstetrics and Gynecology, University Hospital, Ludwig-Maximilians-University, 81377 Munich, Germany; (H.Y.); (T.K.); (S.M.); (C.P.); (J.v.D.); (S.E.); (C.K.); (M.R.); (S.M.); (V.v.S.)
| | - Corinna Paul
- Department of Obstetrics and Gynecology, University Hospital, Ludwig-Maximilians-University, 81377 Munich, Germany; (H.Y.); (T.K.); (S.M.); (C.P.); (J.v.D.); (S.E.); (C.K.); (M.R.); (S.M.); (V.v.S.)
| | - Julia van Dorp
- Department of Obstetrics and Gynecology, University Hospital, Ludwig-Maximilians-University, 81377 Munich, Germany; (H.Y.); (T.K.); (S.M.); (C.P.); (J.v.D.); (S.E.); (C.K.); (M.R.); (S.M.); (V.v.S.)
| | - Sibel Eren
- Department of Obstetrics and Gynecology, University Hospital, Ludwig-Maximilians-University, 81377 Munich, Germany; (H.Y.); (T.K.); (S.M.); (C.P.); (J.v.D.); (S.E.); (C.K.); (M.R.); (S.M.); (V.v.S.)
| | - Christina Kuhn
- Department of Obstetrics and Gynecology, University Hospital, Ludwig-Maximilians-University, 81377 Munich, Germany; (H.Y.); (T.K.); (S.M.); (C.P.); (J.v.D.); (S.E.); (C.K.); (M.R.); (S.M.); (V.v.S.)
- Department of Obstetrics and Gynecology, University Hospital Augsburg, 86156 Augsburg, Germany
| | - Martina Rahmeh
- Department of Obstetrics and Gynecology, University Hospital, Ludwig-Maximilians-University, 81377 Munich, Germany; (H.Y.); (T.K.); (S.M.); (C.P.); (J.v.D.); (S.E.); (C.K.); (M.R.); (S.M.); (V.v.S.)
| | - Sven Mahner
- Department of Obstetrics and Gynecology, University Hospital, Ludwig-Maximilians-University, 81377 Munich, Germany; (H.Y.); (T.K.); (S.M.); (C.P.); (J.v.D.); (S.E.); (C.K.); (M.R.); (S.M.); (V.v.S.)
| | - Udo Jeschke
- Department of Obstetrics and Gynecology, University Hospital, Ludwig-Maximilians-University, 81377 Munich, Germany; (H.Y.); (T.K.); (S.M.); (C.P.); (J.v.D.); (S.E.); (C.K.); (M.R.); (S.M.); (V.v.S.)
- Department of Obstetrics and Gynecology, University Hospital Augsburg, 86156 Augsburg, Germany
| | - Viktoria von Schönfeldt
- Department of Obstetrics and Gynecology, University Hospital, Ludwig-Maximilians-University, 81377 Munich, Germany; (H.Y.); (T.K.); (S.M.); (C.P.); (J.v.D.); (S.E.); (C.K.); (M.R.); (S.M.); (V.v.S.)
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32
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Li L, Xia Y, Yang Y, Zhang W, Yan H, Yin P, Li K, Chen Y, Lu L, Tong G. CDC26 is a key factor in human oocyte aging. Hum Reprod 2021; 36:3095-3107. [PMID: 34590680 DOI: 10.1093/humrep/deab217] [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: 01/13/2021] [Revised: 08/01/2021] [Indexed: 11/13/2022] Open
Abstract
STUDY QUESTION Is CDC26 a key factor in human oocyte aging? SUMMARY ANSWER The lack of CDC26 disrupts the oocytes maturation process, leading to oocyte aging, but these defects could be partially rescued by overexpression of the CDC26 protein. WHAT IS KNOWN ALREADY Age-related oocyte aging is the main cause of female fertility decline. In mammalian oocytes, aberrant meiosis can cause chromosomal abnormalities that might lead to infertility and developmental disorders. CDC26 participates in the meiosis process. STUDY DESIGN, SIZE, DURATION Differential gene expression in young and old women oocytes were screened by single-cell RNA-seq technology, and the functions of differentially genes were verified on mouse oocytes. Finally, transfection technology was used to evaluate the effect of a differentially expressed gene in rescuing human oocyte from aging. PARTICIPANTS/MATERIALS, SETTING, METHODS Discarded human oocytes were collected for single-cell RNA-seq, q-PCR and immunocytochemical analyses to screen for and identify differential gene expression. Female KM mice oocytes were collected for IVM of oocytes, q-PCR and immunocytochemical analyses to delineate the relationships between oocyte aging and differential gene expression. Additionally, recombinant lentiviral vectors encoding CDC26 were transfected into the germinal vesicle oocytes of older women, to investigate the effects of the CDC26 gene expression on oocyte development. MAIN RESULTS AND THE ROLE OF CHANCE Many genes were found to be differentially expressed in the oocytes of young versus old patients via RNA-seq technology. CDC26 mRNA and protein levels in aged oocytes were severely decreased, when compared with the levels observed in young oocytes. Moreover, aged oocytes lacking CDC26 were more prone to aneuploidy. These defects in aged oocytes could be partially rescued by overexpression of the CDC26 protein. LARGE SCALE DATA N/A. LIMITATIONS, REASONS FOR CAUTION Our study delineated key steps in the oocyte aging process by identifying the key role of CDC26 in the progression of oocyte maturation. Future studies are required to address whether other signaling pathways play a role in regulating oocyte maturation via CDC26 and which genes are the direct molecular targets of CDC26. WIDER IMPLICATIONS OF THE FINDINGS Our results using in vitro systems for both mouse and human oocyte maturation provide a proof of principle that CDC26 may represent a novel therapeutic approach against maternal aging-related spindle and chromosomal abnormalities. STUDY FUNDING/COMPETING INTEREST(S) This work was supported by grants from the National Natural Science Foundation of China (81571442 and 81170571), the outstanding Talent Project of Shanghai Municipal Commission of Health (XBR2011067) and Clinical Research and Cultivation Project in Shanghai Municipal Hospitals (SHDC12019X32). The authors declare no conflict of interest.
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Affiliation(s)
- Li Li
- Reproductive Medicine Center, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Ye Xia
- Reproductive Medicine Center, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Yang Yang
- Reproductive Medicine Center, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Wuwen Zhang
- Reproductive Medicine Center, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Hua Yan
- Reproductive Medicine Center, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Ping Yin
- Reproductive Medicine Center, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Kai Li
- Reproductive Medicine Center, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Yuanyuan Chen
- Reproductive Medicine Center, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Lu Lu
- Reproductive Medicine Center, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Guoqing Tong
- Reproductive Medicine Center, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China
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33
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Singh AK, Kumar SL, Beniwal R, Mohanty A, Kushwaha B, Rao HBDP. Local DNA synthesis is critical for DNA repair during oocyte maturation. J Cell Sci 2021; 134:272449. [PMID: 34415018 DOI: 10.1242/jcs.257774] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Accepted: 08/16/2021] [Indexed: 01/04/2023] Open
Abstract
Mammalian oocytes can be very long-lived cells and thereby are very likely to encounter DNA damage during their lifetime. Defective DNA repair may result in oocytes that are developmentally incompetent or give rise to progeny with congenital disorders. During oocyte maturation, damaged DNA is repaired primarily by non-homologous end joining (NHEJ) or homologous recombination (HR). Although these repair pathways have been studied extensively, the associated DNA synthesis is poorly characterized. Here, using porcine oocytes, we demonstrate that the DNA synthesis machinery is present during oocyte maturation and dynamically recruited to sites of DNA damage. DNA polymerase δ is identified as being crucial for oocyte DNA synthesis. Furthermore, inhibiting synthesis causes DNA damage to accumulate and delays the progression of oocyte maturation. Importantly, inhibition of the spindle assembly checkpoint (SAC) bypassed the delay of oocyte maturation caused by DNA synthesis inhibition. Finally, we found that ∼20% of unperturbed oocytes experienced spontaneously arising damage during maturation. Cumulatively, our findings indicate that oocyte maturation requires damage-associated DNA synthesis that is monitored by the SAC. This article has an associated First Person interview with the first author of the paper.
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Affiliation(s)
- Ajay K Singh
- National Institute of Animal Biotechnology, Hyderabad, Telangana 500032, India
| | - S Lava Kumar
- National Institute of Animal Biotechnology, Hyderabad, Telangana 500032, India.,Graduate studies, Regional Centre for Biotechnology, Faridabad 121 001, India
| | - Rohit Beniwal
- National Institute of Animal Biotechnology, Hyderabad, Telangana 500032, India.,Graduate studies, Regional Centre for Biotechnology, Faridabad 121 001, India
| | - Aradhana Mohanty
- National Institute of Animal Biotechnology, Hyderabad, Telangana 500032, India.,Graduate studies, Regional Centre for Biotechnology, Faridabad 121 001, India
| | - Bhawna Kushwaha
- National Institute of Animal Biotechnology, Hyderabad, Telangana 500032, India
| | - H B D Prasada Rao
- National Institute of Animal Biotechnology, Hyderabad, Telangana 500032, India
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34
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Li M, Ren C, Zhou S, He Y, Guo Y, Zhang H, Liu L, Cao Q, Wang C, Huang J, Hu Y, Bai X, Guo X, Shu W, Huo R. Integrative proteome analysis implicates aberrant RNA splicing in impaired developmental potential of aged mouse oocytes. Aging Cell 2021; 20:e13482. [PMID: 34582091 PMCID: PMC8520726 DOI: 10.1111/acel.13482] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Revised: 08/18/2021] [Accepted: 09/11/2021] [Indexed: 12/24/2022] Open
Abstract
Aging has many effects on the female reproductive system, among which decreased oocyte quality and impaired embryo developmental potential are the most important factors affecting female fertility. However, the mechanisms underlying oocyte aging are not yet fully understood. Here, we selected normal reproductively aging female mice and constructed a protein expression profile of metaphase II (MII) oocytes from three age groups. A total of 187 differentially expressed (DE) proteins were identified, and bioinformatics analyses showed that these DE proteins were highly enriched in RNA splicing. Next, RNA‐seq was performed on 2‐cell embryos from these three age groups, and splicing analysis showed that a large number of splicing events and genes were discovered at this stage. Differentially spliced genes (DSGs) in the two reproductively aging groups versus the younger group were enriched in biological processes related to DNA damage repair/response. Binding motif analysis suggested that PUF60 might be one of the core splicing factors causing a decline in DNA repair capacity in the subsequent development of oocytes from reproductively aging mice, and changing the splicing pattern of its potential downstream DSG Cdk9 could partially mimic phenotypes in the reproductively aging groups. Taken together, our study suggested that the abnormal expression of splicing regulation proteins in aged MII oocytes would affect the splicing of nascent RNA after zygotic genome activation in 2‐cell embryos, leading to the production of abnormally spliced transcripts of some key genes associated with DNA damage repair/response, thus affecting the developmental potential of aged oocytes.
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Affiliation(s)
- Mingrui Li
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology Suzhou Affiliated Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Gusu School, Nanjing Medical University Nanjing China
- Department of Clinical Nursing, School of Nursing Nanjing Medical University Nanjing China
| | - Chao Ren
- Department of Biotechnology Beijing Institute of Radiation Medicine Beijing China
| | - Shuai Zhou
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology Suzhou Affiliated Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Gusu School, Nanjing Medical University Nanjing China
| | - Yuanlin He
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology Suzhou Affiliated Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Gusu School, Nanjing Medical University Nanjing China
| | - Yueshuai Guo
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology Suzhou Affiliated Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Gusu School, Nanjing Medical University Nanjing China
| | - Hao Zhang
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology Suzhou Affiliated Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Gusu School, Nanjing Medical University Nanjing China
| | - Lu Liu
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology Suzhou Affiliated Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Gusu School, Nanjing Medical University Nanjing China
| | - Qiqi Cao
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology Suzhou Affiliated Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Gusu School, Nanjing Medical University Nanjing China
| | - Congjing Wang
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology Suzhou Affiliated Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Gusu School, Nanjing Medical University Nanjing China
| | - Jie Huang
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology Suzhou Affiliated Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Gusu School, Nanjing Medical University Nanjing China
| | - Yue Hu
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology Suzhou Affiliated Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Gusu School, Nanjing Medical University Nanjing China
| | - Xue Bai
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology Suzhou Affiliated Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Gusu School, Nanjing Medical University Nanjing China
| | - Xuejiang Guo
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology Suzhou Affiliated Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Gusu School, Nanjing Medical University Nanjing China
| | - Wenjie Shu
- Department of Biotechnology Beijing Institute of Radiation Medicine Beijing China
| | - Ran Huo
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology Suzhou Affiliated Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Gusu School, Nanjing Medical University Nanjing China
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Balboula AZ, Schindler K, Kotani T, Kawahara M, Takahashi M. Vitrification-induced activation of lysosomal cathepsin B perturbs spindle assembly checkpoint function in mouse oocytes. Mol Hum Reprod 2021; 26:689-701. [PMID: 32634244 DOI: 10.1093/molehr/gaaa051] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 06/16/2020] [Indexed: 01/05/2023] Open
Abstract
As the age of child-bearing increases and correlates with infertility, cryopreservation of female gametes is becoming common-place in ART. However, the developmental competence of vitrified oocytes has remained low. The underlying mechanisms responsible for reduced oocyte quality post-vitrification are largely unknown. Mouse cumulus-oocyte complexes were vitrified using a cryoloop technique and a mixture of dimethylsulphoxide, ethylene glycol and trehalose as cryoprotectants. Fresh and vitrified/thawed oocytes were compared for chromosome alignment, spindle morphology, kinetochore-microtubule attachments, spindle assembly checkpoint (SAC) and aneuploidy. Although the majority of vitrified oocytes extruded the first polar body (PB), they had a significant increase of chromosome misalignment, abnormal spindle formation and aneuploidy at metaphase II. In contrast to controls, vitrified oocytes extruded the first PB in the presence of nocodazole and etoposide, which should induce metaphase I arrest in a SAC-dependent manner. The fluorescence intensity of mitotic arrest deficient 2 (MAD2), an essential SAC protein, at kinetochores was reduced in vitrified oocytes, indicating that the SAC is weakened after vitrification/thawing. Furthermore, we found that vitrification-associated stress disrupted lysosomal function and stimulated cathepsin B activity, with a subsequent activation of caspase 3. MAD2 localization and SAC function in vitrified oocytes were restored upon treatment with a cathepsin B or a caspase 3 inhibitor. This study was conducted using mouse oocytes, therefore confirming these results in human oocytes is a prerequisite before applying these findings in IVF clinics. Here, we uncovered underlying molecular pathways that contribute to an understanding of how vitrification compromises oocyte quality. Regulating these pathways will be a step toward improving oocyte quality post vitrification and potentially increasing the efficiency of the vitrification program.
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Affiliation(s)
- Ahmed Z Balboula
- Division of Animal Sciences, Animal Sciences Research Center, University of Missouri, Columbia, MO 65211, USA.,Laboratory of Animal Breeding and Reproduction, Graduate school of Agriculture, Hokkaido University, Hokkaido 060-8589, Japan.,Department of Theriogenology, Faculty of Veterinary Medicine, Mansoura University, Mansoura 35516, Egypt
| | - Karen Schindler
- Department of Genetics, Rutgers University, Piscataway, NJ 08854, USA
| | - Tomoya Kotani
- Department of Biological Sciences, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Manabu Kawahara
- Laboratory of Animal Breeding and Reproduction, Graduate school of Agriculture, Hokkaido University, Hokkaido 060-8589, Japan
| | - Masashi Takahashi
- Research Faculty of Agriculture, Hokkaido University, Hokkaido 060-8589, Japan.,Global Station for Food, Land and Water Resources, Global Institution for Collaborative Research and Education (GI-CoRE), Hokkaido 060-0815, Japan
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36
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Del Castillo LM, Buigues A, Rossi V, Soriano MJ, Martinez J, De Felici M, Lamsira HK, Di Rella F, Klinger FG, Pellicer A, Herraiz S. The cyto-protective effects of LH on ovarian reserve and female fertility during exposure to gonadotoxic alkylating agents in an adult mouse model. Hum Reprod 2021; 36:2514-2528. [PMID: 34333622 PMCID: PMC8373474 DOI: 10.1093/humrep/deab165] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Revised: 05/07/2021] [Indexed: 12/15/2022] Open
Abstract
STUDY QUESTION Does LH protect mouse oocytes and female fertility from alkylating chemotherapy? SUMMARY ANSWER LH treatment before and during chemotherapy prevents detrimental effects on follicles and reproductive lifespan. WHAT IS KNOWN ALREADY Chemotherapies can damage the ovary, resulting in premature ovarian failure and reduced fertility in cancer survivors. LH was recently suggested to protect prepubertal mouse follicles from chemotoxic effects of cisplatin treatment. STUDY DESIGN, SIZE, DURATION This experimental study investigated LH effects on primordial follicles exposed to chemotherapy. Seven-week-old CD-1 female mice were randomly allocated to four experimental groups: Control (n = 13), chemotherapy (ChT, n = 15), ChT+LH-1x (n = 15), and ChT+LH-5x (n = 8). To induce primary ovarian insufficiency (POI), animals in the ChT and ChT+LH groups were intraperitoneally injected with 120 mg/kg of cyclophosphamide and 12 mg/kg of busulfan, while control mice received vehicle. For LH treatment, the ChT+LH-1x and ChT+LH-5x animals received a 1 or 5 IU LH dose, respectively, before chemotherapy, then a second LH injection administered with chemotherapy 24 h later. Then, two animals/group were euthanized at 12 and 24 h to investigate the early ovarian response to LH, while remaining mice were housed for 30 days to evaluate short- and long-term reproductive outcomes. The effects of LH and chemotherapy on growing-stage follicles were analyzed in a parallel experiment. Seven-week-old NOD-SCID female mice were allocated to control (n = 5), ChT (n = 5), and ChT+LH-1x (n = 6) groups. Animals were treated as described above, but maintained for 7 days before reproductive assessment. PARTICIPANTS/MATERIALS, SETTING, METHODS In the first experiment, follicular damage (phosphorylated H2AX histone (γH2AX) staining and terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling (TUNEL) assay), apoptotic biomarkers (western blot), and DNA repair pathways (western blot and RT-qPCR) were assessed in ovaries collected at 12 and 24 h to determine early ovarian responses to LH. Thirty days after treatments, remaining mice were stimulated (10 IU of pregnant mare serum gonadotropin (PMSG) and 10 IU of hCG) and mated to collect ovaries, oocytes, and embryos. Histological analysis was performed on ovarian samples to investigate follicular populations and stromal status, and meiotic spindle and chromosome alignment was measured in oocytes by confocal microscopy. Long-term effects were monitored by assessing pregnancy rate and litter size during six consecutive breeding attempts. In the second experiment, mice were stimulated and mated 7 days after treatments and ovaries, oocytes, and embryos were collected. Follicular numbers, follicular protection (DNA damage and apoptosis by H2AX staining and TUNEL assay, respectively), and ovarian stroma were assessed. Oocyte quality was determined by confocal analysis. MAIN RESULTS AND THE ROLE OF CHANCE LH treatment was sufficient to preserve ovarian reserve and follicular development, avoid atresia, and restore ovulation and meiotic spindle configuration in mature oocytes exposed at the primordial stage. LH improved the cumulative pregnancy rate and litter size in six consecutive breeding rounds, confirming the potential of LH treatment to preserve fertility. This protective effect appeared to be mediated by an enhanced early DNA repair response, via homologous recombination, and generation of anti-apoptotic signals in the ovary a few hours after injury with chemotherapy. This response ameliorated the chemotherapy-induced increase in DNA-damaged oocytes and apoptotic granulosa cells. LH treatment also protected growing follicles from chemotherapy. LH reversed the chemotherapy-induced depletion of primordial and primary follicular subpopulations, reduced oocyte DNA damage and granulosa cell apoptosis, restored mature oocyte cohort size, and improved meiotic spindle properties. LARGE SCALE DATA N/A. LIMITATIONS, REASONS FOR CAUTION This was a preliminary study performed with mouse ovarian samples. Therefore, preclinical research with human samples is required for validation. WIDER IMPLICATIONS OF THE FINDINGS The current study tested if LH could protect the adult mouse ovarian reserve and reproductive lifespan from alkylating chemotherapy. These findings highlight the therapeutic potential of LH as a complementary non-surgical strategy for preserving fertility in female cancer patients. STUDY FUNDING/COMPETING INTEREST(S) This study was supported by grants from the Regional Valencian Ministry of Education (PROMETEO/2018/137), the Spanish Ministry of Science and Innovation (CP19/00141), and the Spanish Ministry of Education, Culture and Sports (FPU16/05264). The authors declare no conflict of interest.
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Affiliation(s)
- L M Del Castillo
- IVI Foundation—IIS La Fe, Reproductive Medicine Research Group, Valencia, Spain
- Department of Pediatrics, Obstetrics and Gynecology, School of Medicine, University of Valencia, Valencia, Spain
| | - A Buigues
- IVI Foundation—IIS La Fe, Reproductive Medicine Research Group, Valencia, Spain
| | - V Rossi
- Department of Biomedicine and Prevention, University of Rome Tor Vergata, Rome, Italy
| | - M J Soriano
- IVI Foundation—IIS La Fe, Reproductive Medicine Research Group, Valencia, Spain
| | - J Martinez
- IVI Foundation—IIS La Fe, Reproductive Medicine Research Group, Valencia, Spain
- Department of Pediatrics, Obstetrics and Gynecology, School of Medicine, University of Valencia, Valencia, Spain
| | - M De Felici
- Department of Biomedicine and Prevention, University of Rome Tor Vergata, Rome, Italy
| | - H K Lamsira
- Department of Biomedicine and Prevention, University of Rome Tor Vergata, Rome, Italy
| | - F Di Rella
- Clinical and Experimental Senology, Istituto Nazionale Tumori, IRCCS, Fondazione G. Pascale, Naples, Italy
| | - F G Klinger
- Department of Biomedicine and Prevention, University of Rome Tor Vergata, Rome, Italy
| | - A Pellicer
- IVI Foundation—IIS La Fe, Reproductive Medicine Research Group, Valencia, Spain
- IVI-RMA Rome, Rome, Italy
| | - S Herraiz
- Correspondence address. IVI Foundation—IIS La Fe, Reproductive Medicine Research Group, Av. Fernando Abril Martorell, 106-Torre A-Planta1, 46026 Valencia, Spain. Tel: +34-96-390-33-05; E-mail: https://orcid.org/0000-0003-0703-6922
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Yang Q, Mumusoglu S, Qin Y, Sun Y, Hsueh AJ. A kaleidoscopic view of ovarian genes associated with premature ovarian insufficiency and senescence. FASEB J 2021; 35:e21753. [PMID: 34233068 DOI: 10.1096/fj.202100756r] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 06/04/2021] [Accepted: 06/08/2021] [Indexed: 12/14/2022]
Abstract
Ovarian infertility and subfertility presenting with premature ovarian insufficiency (POI) and diminished ovarian reserve are major issues facing the developed world due to the trend of delaying childbirth. Ovarian senescence and POI represent a continuum of physiological/pathophysiological changes in ovarian follicle functions. Based on advances in whole exome sequencing, evaluation of gene copy variants, together with family-based and genome-wide association studies, we discussed genes responsible for POI and ovarian senescence. We used a gene-centric approach to sort out literature deposited in the Ovarian Kaleidoscope database (http://okdb.appliedbioinfo.net) by sub-categorizing candidate genes as ligand-receptor signaling, meiosis and DNA repair, transcriptional factors, RNA metabolism, enzymes, and others. We discussed individual gene mutations found in POI patients and verification of gene functions in gene-deleted model organisms. Decreased expression of some of the POI genes could be responsible for ovarian senescence, especially those essential for DNA repair, meiosis and mitochondrial functions. We propose to set up a candidate gene panel for targeted sequencing in POI patients together with studies on mitochondria-associated genes in middle-aged subfertile patients.
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Affiliation(s)
- Qingling Yang
- Center for Reproductive Medicine, Henan Key Laboratory of Reproduction and Genetics, First Affiliated Hospital of Zhengzhou University, Zhengzhou, China.,Department of Obstetrics and Gynecology, Stanford University School of Medicine, Stanford, CA, USA
| | - Sezcan Mumusoglu
- Department of Obstetrics and Gynecology, Stanford University School of Medicine, Stanford, CA, USA.,Department of Obstetrics and Gynecology, Hacettepe University School of Medicine, Ankara, Turkey
| | - Yingying Qin
- Center for Reproductive Medicine, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Yingpu Sun
- Center for Reproductive Medicine, Henan Key Laboratory of Reproduction and Genetics, First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Aaron J Hsueh
- Department of Obstetrics and Gynecology, Stanford University School of Medicine, Stanford, CA, USA
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Timóteo-Ferreira F, Abreu D, Mendes S, Matos L, Rodrigues A, Almeida H, Silva E. Redox imbalance in age-related ovarian dysfunction and perspectives for its prevention. Ageing Res Rev 2021; 68:101345. [PMID: 33894395 DOI: 10.1016/j.arr.2021.101345] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Revised: 04/07/2021] [Accepted: 04/16/2021] [Indexed: 12/17/2022]
Abstract
The age at which women have their first child is increasing. This change represents a major health problem to society because advanced maternal age is related with a decay in fertility and an increase in the incidence of a variety of pregnancy complications and offspring health issues. The ovary stands as the main contributor for female reproductive ageing because of the progressive age-related decrease in follicle number and oocyte quality. Loss of redox homeostasis and establishment of an ovarian oxidative microenvironment are seen as major underlying causes for such downfall and impairment of ovarian function. Thus, the use of antioxidants to preserve fertility became an important field of research. In this review, new insights on mechanisms underlying the establishment of oxidative stress and its repercussions on ovarian ageing are addressed, along with the current state of knowledge on antioxidant supplementation and its contribution for healthy ageing and extension of ovarian lifespan.
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Karavani G, Wasserzug-Pash P, Mordechai-Daniel T, Bauman D, Klutstein M, Imbar T. Age-Dependent in vitro Maturation Efficacy of Human Oocytes - Is There an Optimal Age? Front Cell Dev Biol 2021; 9:667682. [PMID: 34222236 PMCID: PMC8250136 DOI: 10.3389/fcell.2021.667682] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2021] [Accepted: 05/31/2021] [Indexed: 11/13/2022] Open
Abstract
In vitro maturation of oocytes from antral follicles seen during tissue harvesting is a fertility preservation technique with potential advantages over ovarian tissue cryopreservation (OTC), as mature frozen and later thawed oocyte used for fertilization poses decreased risk of malignant cells re-seeding, as compared to ovarian tissue implantation. We previously demonstrated that in vitro maturation (IVM) performed following OTC in fertility preservation patients, even in pre-menarche girls, yields a fair amount of oocytes available for IVM and freezing for future use. We conducted a retrospective cohort study, evaluating IVM outcomes in chemotherapy naïve patients referred for fertility preservation by OTC that had oocyte collected from the medium with attempted IVM. A total of 133 chemotherapy naïve patients aged 1-35 years were included in the study. The primary outcome was IVM rate in the different age groups - pre-menarche (1-5 and ≥6 years), post-menarche (menarche-17 years), young adults (18-24 years) and adults (25-29 and 30-35 years). We demonstrate a gradual increase in mean IVM rate in the age groups from 1 to 25 years [4.6% (1-5 years), 23.8% (6 years to menarche), and 28.4% (menarche to 17 years)], with a peak of 38.3% in the 18-24 years group, followed by a decrease in the 25-29 years group (19.3%), down to a very low IVM rate (8.9%) in the 30-35 years group. A significant difference in IVM rates was noted between the age extremes - the very young (1-5 years) and the oldest (30-35 years) groups, as compared with the 18-24-year group (p < 0.001). Importantly, number of oocytes matured, percent of patients with matured oocytes, and overall maturation rate differed significantly (p < 0.001). Our finding of extremely low success rates in those very young (under 6 years) and older (≥30 years) patients suggests that oocytes retrieved during OTC prior to chemotherapy have an optimal window of age that shows higher success rates, suggesting that oocytes may have an inherent tendency toward better maturation in those age groups.
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Affiliation(s)
- Gilad Karavani
- Fertility Preservation Service, Department of Obstetrics and Gynecology, Hadassah Ein Kerem Medical Center and Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Peera Wasserzug-Pash
- Institute of Biomedical and Oral Research, Faculty of Dental Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Talya Mordechai-Daniel
- Fertility Preservation Service, Department of Obstetrics and Gynecology, Hadassah Ein Kerem Medical Center and Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Dvora Bauman
- Fertility Preservation Service, Department of Obstetrics and Gynecology, Hadassah Ein Kerem Medical Center and Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Michael Klutstein
- Institute of Biomedical and Oral Research, Faculty of Dental Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Tal Imbar
- Fertility Preservation Service, Department of Obstetrics and Gynecology, Hadassah Ein Kerem Medical Center and Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
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40
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Al-Zubaidi U, Adhikari D, Cinar O, Zhang QH, Yuen WS, Murphy MP, Rombauts L, Robker RL, Carroll J. Mitochondria-targeted therapeutics, MitoQ and BGP-15, reverse aging-associated meiotic spindle defects in mouse and human oocytes. Hum Reprod 2021; 36:771-784. [PMID: 33367783 DOI: 10.1093/humrep/deaa300] [Citation(s) in RCA: 56] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 09/28/2020] [Indexed: 12/22/2022] Open
Abstract
STUDY QUESTION Do mitochondria-targeted therapies reverse ageing- and oxidative stress-induced spindle defects in oocytes from mice and humans? SUMMARY ANSWER Exposure to MitoQ or BGP-15 during IVM protected against spindle and chromosomal defects in mouse oocytes exposed to oxidative stress or derived from reproductively aged mice whilst MitoQ promoted nuclear maturation and protected against chromosomal misalignments in human oocytes. WHAT IS KNOWN ALREADY Spindle and chromosomal abnormalities in oocytes are more prevalent with maternal aging, increasing the risk of aneuploidy, miscarriage and genetic disorders such as Down's syndrome. The origin of compromised oocyte function may be founded in mitochondrial dysfunction and increased reactive oxygen species (ROS). STUDY DESIGN, SIZE, DURATION Oocytes from young and old mice were treated with MitoQ and/or BGP-15 during IVM. To directly induce mitochondrial dysfunction, oocytes were treated with H2O2, and then treated the MitoQ and/or BGP-15. Immature human oocytes were cultured with or without MitoQ. Each experiment was repeated at least three times, and data were analyzed by unpaired-sample t-test or chi-square test. PARTICIPANTS/MATERIALS, SETTING, METHODS Immature germinal vesicle (GV) stage oocytes from 1-, 12- and 18-month-old mice were obtained from preovulatory ovarian follicles. Oocytes were treated with MitoQ and/or BGP-15 during IVM. GV-stage human oocytes were cultured with or without MitoQ. Mitochondrial membrane potential and mitochondrial ROS were measured by live-cell imaging. Meiotic spindle and chromosome alignments were visualized by immunofluorescent labeling of fixed oocytes and the 3-dimensional images were analyzed by Imaris. MAIN RESULTS AND THE ROLE OF CHANCE MitoQ or BGP-15 during IVM protects against spindle and chromosomal defects in oocytes exposed to oxidative stress and in oocytes from aged mice (P < 0.001). In human oocytes, the presence of MitoQ during IVM promoted nuclear maturation and had a similar positive effect in protecting against chromosomal misalignments (P < 0.001). LIMITATIONS, REASONS FOR CAUTION Our study identifies two excellent candidates that may help to improve fertility in older women. However, these potential therapies must be tested for efficacy in clinical IVM systems, and undergo thorough examination of resultant offspring in preclinical models before utilization. WIDER IMPLICATIONS OF THE FINDINGS Our results using in-vitro systems for oocyte maturation in both mouse and human provide proof of principle that mitochondrially targeted molecules such as MitoQ and BGP-15 may represent a novel therapeutic approach against maternal aging-related spindle and chromosomal abnormalities. STUDY FUNDING/COMPETING INTEREST(S) The project was financially supported by the National Health and Medical Research Council and Australian Research Council, Australia. U.A.-Z. was supported by the Iraqi Higher Education and Scientific Research Ministry PhD scholarship and O.C. was supported by TUBITAK-1059B191601275. M.P.M. consults for MitoQ Inc. and holds patents in mitochondria-targeted therapies. R.L.R. is an inventor on patents relating to the use of BGP-15 to improve gamete quality. TRIAL REGISTRATION NUMBER N/A.
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Affiliation(s)
- Usama Al-Zubaidi
- Development and Stem Cell Program and Department of Anatomy and Developmental Biology, Monash Biomedicine Discovery Institute, Monash University, Melbourne, VIC 3800, Australia.,Applied Embryology Department, High Institute for Infertility Diagnosis and Assisted Reproductive Technologies, AL-Nahrain University, Baghdad, Iraq
| | - Deepak Adhikari
- Development and Stem Cell Program and Department of Anatomy and Developmental Biology, Monash Biomedicine Discovery Institute, Monash University, Melbourne, VIC 3800, Australia
| | - Ozgur Cinar
- Development and Stem Cell Program and Department of Anatomy and Developmental Biology, Monash Biomedicine Discovery Institute, Monash University, Melbourne, VIC 3800, Australia.,Department of Histology and Embryology, Ankara University School of Medicine, Ankara, Turkey
| | - Qing-Hua Zhang
- Development and Stem Cell Program and Department of Anatomy and Developmental Biology, Monash Biomedicine Discovery Institute, Monash University, Melbourne, VIC 3800, Australia
| | - Wai Shan Yuen
- Development and Stem Cell Program and Department of Anatomy and Developmental Biology, Monash Biomedicine Discovery Institute, Monash University, Melbourne, VIC 3800, Australia
| | - Michael P Murphy
- MRC Mitochondrial Biology Unit, University of Cambridge, Hills Road, Cambridge CB2 0XY, UK
| | - Luk Rombauts
- Monash IVF, Melbourne, VIC, Australia.,Department of Obstetrics and Gynaecology, Monash University, Melbourne, VIC, Australia
| | - Rebecca L Robker
- Development and Stem Cell Program and Department of Anatomy and Developmental Biology, Monash Biomedicine Discovery Institute, Monash University, Melbourne, VIC 3800, Australia.,School of Medicine, Robinson Research Institute, The University of Adelaide, Adelaide, SA 5005, Australia
| | - John Carroll
- Development and Stem Cell Program and Department of Anatomy and Developmental Biology, Monash Biomedicine Discovery Institute, Monash University, Melbourne, VIC 3800, Australia
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Shukla V, Høffding MK, Hoffmann ER. Genome diversity and instability in human germ cells and preimplantation embryos. Semin Cell Dev Biol 2021; 113:132-147. [PMID: 33500205 PMCID: PMC8097364 DOI: 10.1016/j.semcdb.2020.12.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Accepted: 12/18/2020] [Indexed: 12/26/2022]
Abstract
Genome diversity is essential for evolution and is of fundamental importance to human health. Generating genome diversity requires phases of DNA damage and repair that can cause genome instability. Humans have a high incidence of de novo congenital disorders compared to other organisms. Recent access to eggs, sperm and preimplantation embryos is revealing unprecedented rates of genome instability that may result in infertility and de novo mutations that cause genomic imbalance in at least 70% of conceptions. The error type and incidence of de novo mutations differ during developmental stages and are influenced by differences in male and female meiosis. In females, DNA repair is a critical factor that determines fertility and reproductive lifespan. In males, aberrant meiotic recombination causes infertility, embryonic failure and pregnancy loss. Evidence suggest germ cells are remarkably diverse in the type of genome instability that they display and the DNA damage responses they deploy. Additionally, the initial embryonic cell cycles are characterized by a high degree of genome instability that cause congenital disorders and may limit the use of CRISPR-Cas9 for heritable genome editing.
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Affiliation(s)
- Vallari Shukla
- DNRF Center for Chromosome Stability, Department of Cellular and Molecular Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark
| | - Miya Kudo Høffding
- DNRF Center for Chromosome Stability, Department of Cellular and Molecular Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark
| | - Eva R Hoffmann
- DNRF Center for Chromosome Stability, Department of Cellular and Molecular Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark.
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Homer HA. Senataxin: A New Guardian of the Female Germline Important for Delaying Ovarian Aging. Front Genet 2021; 12:647996. [PMID: 33995483 PMCID: PMC8118517 DOI: 10.3389/fgene.2021.647996] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Accepted: 04/08/2021] [Indexed: 12/01/2022] Open
Abstract
Early decline in ovarian function known as premature ovarian aging (POA) occurs in around 10% of women and is characterized by a markedly reduced ovarian reserve. Premature ovarian insufficiency (POI) affects ~1% of women and refers to the severe end of the POA spectrum in which, accelerated ovarian aging leads to menopause before 40 years of age. Ovarian reserve refers to the total number of follicle-enclosed oocytes within both ovaries. Oocyte DNA integrity is a critical determinant of ovarian reserve since damage to DNA of oocytes within primordial-stage follicles triggers follicular apoptosis leading to accelerated follicle depletion. Despite the high prevalence of POA, very little is known regarding its genetic causation. Another little-investigated aspect of oocyte DNA damage involves low-grade damage that escapes apoptosis at the primordial follicle stage and persists throughout oocyte growth and later follicle development. Senataxin (SETX) is an RNA/DNA helicase involved in repair of oxidative stress-induced DNA damage and is well-known for its roles in preventing neurodegenerative disease. Recent findings uncover an important role for SETX in protecting oocyte DNA integrity against aging-induced increases in oxidative stress. Significantly, this newly identified SETX-mediated regulation of oocyte DNA integrity is critical for preventing POA and early-onset female infertility by preventing premature depletion of the ovarian follicular pool and reducing the burden of low-grade DNA damage both in primordial and fully-grown oocytes.
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Affiliation(s)
- Hayden A Homer
- The Christopher Chen Oocyte Biology Research Laboratory, UQ Centre for Clinical Research, The University of Queensland, Herston, QLD, Australia
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Horta F, Catt S, Ramachandran P, Vollenhoven B, Temple-Smith P. Female ageing affects the DNA repair capacity of oocytes in IVF using a controlled model of sperm DNA damage in mice. Hum Reprod 2021; 35:529-544. [PMID: 32108237 DOI: 10.1093/humrep/dez308] [Citation(s) in RCA: 50] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Revised: 12/17/2019] [Indexed: 01/07/2023] Open
Abstract
STUDY QUESTION Does female ageing have a negative effect on the DNA repair capacity of oocytes fertilised by spermatozoa with controlled levels of DNA damage? SUMMARY ANSWER Compared to oocytes from younger females, oocytes from older females have a reduced capacity to repair damaged DNA introduced by spermatozoa. WHAT IS KNOWN ALREADY The reproductive lifespan in women declines with age predominantly due to poor oocyte quality. This leads to decreased reproductive outcomes for older women undergoing assisted reproductive technology (ART) treatments, compared to young women. Ageing and oocyte quality have been clearly associated with aneuploidy, but the range of factors that influence this change in oocyte quality with age remains unclear. The DNA repair activity prior to embryonic genomic activation is considered to be of maternal origin, with maternal transcripts and proteins controlling DNA integrity. With increasing maternal age, the number of mRNAs stored in oocytes decreases. This could result in diminished efficiency of DNA repair and/or negative effects on embryo development, especially in the presence of DNA damage. STUDY DESIGN, SIZE, DURATION Oocytes from two age groups of 30 super-ovulated female mice (young: 5-8 weeks old, n = 15; old: 42-45 weeks old, n = 15) were inseminated with sperm from five males with three different controlled DNA damage levels; control: ≤10%, 1 Gray (Gy): 11-30%, and 30 Gy: >30%. Inseminated oocytes (young: 125, old: 78) were assessed for the formation of zygotes (per oocyte) and blastocysts (per zygote). Five replicates of five germinal vesicles (GVs) and five MII oocytes from each age group were analysed for gene expression. The DNA damage response (DDR) was assessed in a minimum of three IVF replicates in control and 1 Gy zygotes and two-cell embryos using γH2AX labelling. PARTICIPANTS/MATERIALS, SETTING, METHODS Swim-up sperm samples from the cauda epididymidis of C57BL6 mice were divided into control (no irradiation) and 1- and 30-Gy groups. Treated spermatozoa were irradiated at 1 and 30 Gy, respectively, using a linear accelerator Varian 21iX. Following irradiation, samples were used for DNA damage assessment (Halomax) and for insemination. Presumed zygotes were cultured in a time-lapse incubator (MIRI, ESCO). Gene expression of 91 DNA repair genes was assessed using the Fluidigm Biomark HD system. The DNA damage response in zygotes (6-8 h post-fertilisation) and two-cell embryos (22-24 h post-fertilisation) was assessed by immunocytochemical analysis of γH2AX using confocal microscopy (Olympus FV1200) and 3D volumetric analysis using IMARIS software. MAIN RESULTS AND THE ROLE OF CHANCE The average sperm DNA damage for the three groups was statistically different (control: 6.1%, 1 Gy: 16.1%, 30 Gy: 53.1%, P < 0.0001), but there were no significant differences in fertilisation rates after IVF within or between the two age groups [(young; control: 86.79%, 1 Gy: 82.75%, 30 Gy: 76.74%) (old; control: 93.1%, 1 Gy: 70.37%, 30 Gy: 68.18%) Fisher's exact]. However, blastocyst rates were significantly different (P < 0.0001) among the groups [(young; control: 86.95%, 1 Gy: 33.33%, 30 Gy: 0.0%) (old; control: 70.37%, 1 Gy: 0.0%, 30 Gy: 0.0%)]. Between the age groups, 1-Gy samples showed a significant decrease in the blastocyst rate in old females compared to young females (P = 0.0166). Gene expression analysis revealed a decrease in relative expression of 21 DNA repair genes in old GV oocytes compared to young GV oocytes (P < 0.05), and similarly, old MII oocytes showed 23 genes with reduced expression compared to young MII oocytes (P < 0.05). The number of genes with decreased expression in older GV and MII oocytes significantly affected pathways such as double strand break (GV: 5; MII: 6), nucleotide excision repair (GV: 8; MII: 5) and DNA damage response (GV: 4; MII: 8). There was a decreased DDR in zygotes and in two-cell embryos from old females compared to young regardless of sperm treatment (P < 0.05). The decrease in DNA repair gene expression of oocytes and decreased DDR in embryos derived from older females suggests that ageing results in a diminished DNA repair capacity. LARGE-SCALE DATA N/A. LIMITATIONS, REASONS FOR CAUTION Ionising radiation was used only for experimental purposes, aiming at controlled levels of sperm DNA damage; however, it can also damage spermatozoa proteins. The female age groups selected in mice were intended to model effects in young and old women, but clinical studies are required to demonstrate a similar effect. WIDER IMPLICATIONS OF THE FINDINGS Fertilisation can occur with sperm populations with medium and high DNA damage, but subsequent embryo growth is affected to a greater extent with aging females, supporting the theory that oocyte DNA repair capacity decreases with age. Assessment of the oocyte DNA repair capacity may be a useful diagnostic tool for infertile couples. STUDY FUNDING/COMPETING INTEREST(S) Funded by the Education Program in Reproduction and Development, Department of Obstetrics and Gynaecology, Monash University. None of the authors has any conflict of interest to report.
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Affiliation(s)
- F Horta
- Education Program in Reproduction & Development, Department of Obstetrics and Gynecology, Monash University, Melbourne, VIC 3168, Australia
| | - S Catt
- Education Program in Reproduction & Development, Department of Obstetrics and Gynecology, Monash University, Melbourne, VIC 3168, Australia
| | - P Ramachandran
- Peter MacCallum Cancer Centre, Monash Health, Melbourne, VIC 3164, Australia
| | - B Vollenhoven
- Monash IVF, Melbourne, VIC 3168, Australia.,Women's and Newborn Program, Monash Health, VIC 3169, Australia.,Department of Obstetrics and Gynecology, Monash University, Melbourne, VIC 3168, Australia
| | - P Temple-Smith
- Education Program in Reproduction & Development, Department of Obstetrics and Gynecology, Monash University, Melbourne, VIC 3168, Australia
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Anesetti G, Chávez-Genaro R. Neonatal androgenization in rats affects oocyte maturation. Reprod Sci 2021; 28:2799-2806. [PMID: 33825168 DOI: 10.1007/s43032-021-00559-6] [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: 07/24/2020] [Accepted: 03/25/2021] [Indexed: 10/21/2022]
Abstract
Androgens are relevant in order to achieve a normal growth and maturation of the follicle and oocyte, since both excess and absence of androgens may affect the correct ovarian function. The current study analyzes the impact of neonatal androgenization in the first ovulation and oocyte maturation in response to exogenous gonadotrophin stimulation. Neonatal rats were daily treated with testosterone, dihydrotestosterone, or vehicle during follicle assembly period (days 1 to 5). At juvenile period, rats were stimulated sequentially with PMSG and hCG. Ovulation, ovarian histology, hormonal milieu, morphological characteristics of meiotic spindle, and in vitro fertilization rate in oocytes were analyzed. Our data shows that oocytes from androgenized rats displayed a major proportion of aberrant spindles and altered meiotic advance that control animals. These alterations were accompanied with an increase in both fertilization rate and aberrant embryos after 48 h of culture. Our findings showed a direct impact of neonatal androgens on oocyte development; their effects may be recognized at adulthood, supporting the idea of a programming effect exerted by neonatal androgens. These results could be relevant to explain the low fertility rate seen in polycystic ovary syndrome patients after in vitro fertilization procedures.
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Affiliation(s)
- Gabriel Anesetti
- Laboratorio de Biología de la Reproducción, Departamento de Histología y Embriología, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay.
| | - Rebeca Chávez-Genaro
- Laboratorio de Biología de la Reproducción, Departamento de Histología y Embriología, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
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Subramanian GN, Lavin M, Homer HA. Premature ovarian ageing following heterozygous loss of Senataxin. Mol Hum Reprod 2021; 27:gaaa080. [PMID: 33337500 DOI: 10.1093/molehr/gaaa080] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2020] [Revised: 11/09/2020] [Indexed: 12/21/2022] Open
Abstract
Premature loss of ovarian activity before 40 years of age is known as primary ovarian insufficiency (POI) and occurs in ∼1% of women. A more subtle decline in ovarian activity, known as premature ovarian ageing (POA), occurs in ∼10% of women. Despite the high prevalence of POA, very little is known regarding its genetic causation. Senataxin (SETX) is an RNA/DNA helicase involved in repair of oxidative stress-induced DNA damage. Homozygous mutation of SETX leads to the neurodegenerative disorder, ataxia oculomotor apraxia type 2 (AOA2). There have been reports of POI in AOA2 females suggesting a link between SETX and ovarian ageing. Here, we studied female mice lacking either one (Setx+/-) or both (Setx-/-) copies of SETX over a 12- to 14-month period. We find that DNA damage is increased in oocytes from 8-month-old Setx+/- and Setx-/- females compared with Setx+/+ oocytes leading to a marked reduction in all classes of ovarian follicles at least 4 months earlier than typically occurs in female mice. Furthermore, during a 12-month long mating trial, Setx+/- and Setx-/- females produced significantly fewer pups than Setx+/+ females from 7 months of age onwards. These data show that SETX is critical for preventing POA in mice, likely by preserving DNA integrity in oocytes. Intriguingly, heterozygous Setx loss causes an equally severe impact on ovarian ageing as homozygous Setx loss. Because heterozygous SETX disruption is less likely to produce systemic effects, SETX compromise could underpin some cases of insidious POA.
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Affiliation(s)
- G N Subramanian
- The Christopher Chen Oocyte Biology Research Laboratory, UQ Centre for Clinical Research, The University of Queensland, Herston, QLD, Australia
| | - M Lavin
- Cancer and Neuroscience Laboratory, UQ Centre for Clinical Research, The University of Queensland, Herston, QLD, Australia
| | - H A Homer
- The Christopher Chen Oocyte Biology Research Laboratory, UQ Centre for Clinical Research, The University of Queensland, Herston, QLD, Australia
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46
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Horta F, Ravichandran A, Catt S, Vollenhoven B, Temple-Smith P. Ageing and ovarian stimulation modulate the relative levels of transcript abundance of oocyte DNA repair genes during the germinal vesicle-metaphase II transition in mice. J Assist Reprod Genet 2021; 38:55-69. [PMID: 33067741 PMCID: PMC7822980 DOI: 10.1007/s10815-020-01981-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Accepted: 10/13/2020] [Indexed: 10/23/2022] Open
Abstract
PURPOSE Oocyte quality and reproductive outcome are negatively affected by advanced maternal age, ovarian stimulation and method of oocyte maturation during assisted reproduction; however, the mechanisms responsible for these associations are not fully understood. The aim of this study was to compare the effects of ageing, ovarian stimulation and in-vitro maturation on the relative levels of transcript abundance of genes associated with DNA repair during the transition of germinal vesicle (GV) to metaphase II (MII) stages of oocyte development. METHODS The relative levels of transcript abundance of 90 DNA repair-associated genes was compared in GV-stage and MII-stage oocytes from unstimulated and hormone-stimulated ovaries from young (5-8-week-old) and old (42-45-week-old) C57BL6 mice. Ovarian stimulation was conducted using pregnant mare serum gonadotropin (PMSG) or anti-inhibin serum (AIS). DNA damage response was quantified by immunolabeling of the phosphorylated histone variant H2AX (γH2AX). RESULTS The relative transcript abundance in DNA repair genes was significantly lower in MII oocytes compared to GV oocytes in young unstimulated and PMSG stimulated but was higher in AIS-stimulated mice. Interestingly, an increase in the relative level of transcript abundance of DNA repair genes was observed in MII oocytes from older mice in unstimulated, PMSG-stimulated and AIS-stimulated mice. Decreased γH2AX levels were found in both GV oocytes (82.9%) and MII oocytes (37.5%) during ageing in both ovarian stimulation types used (PMSG/AIS; p < 0.05). CONCLUSIONS In conclusion, DNA repair relative levels of transcript abundance are altered by maternal age and the method of ovarian stimulation during the GV-MII transition in oocytes.
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Affiliation(s)
- Fabrizzio Horta
- Education Program in Reproduction and Development, EPRD, Department of Obstetrics and Gynecology, School of Clinical Science, Monash University, Melbourne, VIC, 3168, Australia.
- Monash IVF, Melbourne, VIC, 3168, Australia.
| | - Aravind Ravichandran
- Education Program in Reproduction and Development, EPRD, Department of Obstetrics and Gynecology, School of Clinical Science, Monash University, Melbourne, VIC, 3168, Australia
| | - Sally Catt
- Education Program in Reproduction and Development, EPRD, Department of Obstetrics and Gynecology, School of Clinical Science, Monash University, Melbourne, VIC, 3168, Australia
| | - Beverley Vollenhoven
- Education Program in Reproduction and Development, EPRD, Department of Obstetrics and Gynecology, School of Clinical Science, Monash University, Melbourne, VIC, 3168, Australia
- Monash IVF, Melbourne, VIC, 3168, Australia
- Women's and Newborn Program, Monash Health, Melbourne, Australia
| | - Peter Temple-Smith
- Education Program in Reproduction and Development, EPRD, Department of Obstetrics and Gynecology, School of Clinical Science, Monash University, Melbourne, VIC, 3168, Australia
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Subramanian GN, Greaney J, Wei Z, Becherel O, Lavin M, Homer HA. Oocytes mount a noncanonical DNA damage response involving APC-Cdh1-mediated proteolysis. J Cell Biol 2020; 219:151594. [PMID: 32328643 PMCID: PMC7147104 DOI: 10.1083/jcb.201907213] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Revised: 12/15/2019] [Accepted: 01/31/2020] [Indexed: 12/26/2022] Open
Abstract
In mitotic cells, DNA damage induces temporary G2 arrest via inhibitory Cdk1 phosphorylation. In contrast, fully grown G2-stage oocytes readily enter M phase immediately following chemical induction of DNA damage in vitro, indicating that the canonical immediate-response G2/M DNA damage response (DDR) may be deficient. Senataxin (Setx) is involved in RNA/DNA processing and maintaining genome integrity. Here we find that mouse oocytes deleted of Setx accumulate DNA damage when exposed to oxidative stress in vitro and during aging in vivo, after which, surprisingly, they undergo G2 arrest. Moreover, fully grown wild-type oocytes undergo G2 arrest after chemotherapy-induced in vitro damage if an overnight delay is imposed following damage induction. Unexpectedly, this slow-evolving DDR is not mediated by inhibitory Cdk1 phosphorylation but by APC-Cdh1–mediated proteolysis of the Cdk1 activator, cyclin B1, secondary to increased Cdc14B-dependent APC-Cdh1 activation and reduced Emi1-dependent inhibition. Thus, oocytes are unable to respond immediately to DNA damage, but instead mount a G2/M DDR that evolves slowly and involves a phosphorylation-independent proteolytic pathway.
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Affiliation(s)
- Goutham Narayanan Subramanian
- The Christopher Chen Oocyte Biology Research Laboratory, University of Queensland Centre for Clinical Research, The University of Queensland, Queensland, Australia
| | - Jessica Greaney
- The Christopher Chen Oocyte Biology Research Laboratory, University of Queensland Centre for Clinical Research, The University of Queensland, Queensland, Australia
| | - Zhe Wei
- The Christopher Chen Oocyte Biology Research Laboratory, University of Queensland Centre for Clinical Research, The University of Queensland, Queensland, Australia
| | - Olivier Becherel
- Cancer and Neurosciences Lab, University of Queensland Centre for Clinical Research, The University of Queensland, Queensland, Australia
| | - Martin Lavin
- Cancer and Neurosciences Lab, University of Queensland Centre for Clinical Research, The University of Queensland, Queensland, Australia
| | - Hayden Anthony Homer
- The Christopher Chen Oocyte Biology Research Laboratory, University of Queensland Centre for Clinical Research, The University of Queensland, Queensland, Australia
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Jo YJ, Yoon SB, Park BJ, Lee SI, Kim KJ, Kim SY, Kim M, Lee JK, Lee SY, Lee DH, Kwon T, Son Y, Lee JR, Kwon J, Kim JS. Particulate Matter Exposure During Oocyte Maturation: Cell Cycle Arrest, ROS Generation, and Early Apoptosis in Mice. Front Cell Dev Biol 2020; 8:602097. [PMID: 33324650 PMCID: PMC7726243 DOI: 10.3389/fcell.2020.602097] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Accepted: 11/02/2020] [Indexed: 11/13/2022] Open
Abstract
Particulate matter (PM) is a general atmospheric pollutant released into the air by an anthropogenic and naturally derived mixture of substances. Current studies indicate that fine dust can result in different health defects, including endothelial dysfunction, asthma, lung cancer, cardiovascular diseases, uterine leiomyoma, deterioration in sperm quality, and overall birth impairment. However, the most prominent effects of PM10 (diameter < 10 μM) exposure on the female reproductive system, especially with respect to oocyte maturation, remain unclear. In the present study, maturing mouse oocytes were treated with PM10 and the phenotypes of the resulting toxic effects were investigated. Exposure to PM10 led to impairment of maturation capacity by inducing cell cycle arrest and blocking normal polar body extrusion during in vitro maturation and activation of fertilization of mouse oocytes. Additionally, defects in tubulin formation and DNA alignment were observed in PM10-treated oocytes during metaphase I to anaphase/telophase I transition. Moreover, PM10 induced reactive oxygen species generation, mitochondrial dysfunction, DNA damage, and early apoptosis. Taken together, these results indicate that PM10 exposure leads to a decline in oocyte quality and affects the subsequent embryonic development potential of mammalian oocytes.
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Affiliation(s)
- Yu-Jin Jo
- Primate Resources Center (PRC), Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeongeup, South Korea
| | - Seung-Bin Yoon
- Primate Resources Center (PRC), Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeongeup, South Korea
| | - Byoung-Jin Park
- Primate Resources Center (PRC), Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeongeup, South Korea
| | - Sang Il Lee
- Primate Resources Center (PRC), Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeongeup, South Korea
| | - Ki Jin Kim
- Primate Resources Center (PRC), Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeongeup, South Korea
| | - Se-Yong Kim
- Primate Resources Center (PRC), Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeongeup, South Korea
| | - Minseong Kim
- Primate Resources Center (PRC), Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeongeup, South Korea
| | - Jun-Ki Lee
- Primate Resources Center (PRC), Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeongeup, South Korea
| | - Sang-Yong Lee
- Primate Resources Center (PRC), Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeongeup, South Korea
| | - Dong-Ho Lee
- Primate Resources Center (PRC), Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeongeup, South Korea
| | - Taeho Kwon
- Primate Resources Center (PRC), Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeongeup, South Korea
| | - Yeonghoon Son
- Primate Resources Center (PRC), Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeongeup, South Korea
| | - Ja-Rang Lee
- Primate Resources Center (PRC), Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeongeup, South Korea
| | - Jeongwoo Kwon
- Primate Resources Center (PRC), Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeongeup, South Korea
| | - Ji-Su Kim
- Primate Resources Center (PRC), Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeongeup, South Korea
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49
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Ma JY, Li S, Chen LN, Schatten H, Ou XH, Sun QY. Why is oocyte aneuploidy increased with maternal aging? J Genet Genomics 2020; 47:659-671. [PMID: 33184002 DOI: 10.1016/j.jgg.2020.04.003] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Revised: 04/27/2020] [Accepted: 04/28/2020] [Indexed: 12/19/2022]
Abstract
One of the main causes of pregnancy failure and fetus abortion is oocyte aneuploidy, which is increased with maternal aging. Numerous possible causes of oocyte aneuploidy in aged women have been proposed, including cross-over formation defect, cohesin loss, spindle deformation, spindle assembly checkpoint malfunction, microtubule-kinetochore attachment failure, kinetochore mis-orientation, mitochondria dysfunction-induced increases in reactive oxygen species, protein over-acetylation, and DNA damage. However, it still needs to be answered if these aneuploidization factors have inherent relations, and how to prevent chromosome aneuploidy in aged oocytes. Epidemiologically, oocyte aneuploidy has been found to be weakly associated with higher homocysteine concentrations, obesity, ionizing radiation and even seasonality. In this review, we summarize the research progress and present an integrated view of oocyte aneuploidization.
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Affiliation(s)
- Jun-Yu Ma
- Fertility Preservation Lab, Reproductive Medicine Center, Guangdong Second Provincial General Hospital, Guangzhou, 510317, China
| | - Sen Li
- Fertility Preservation Lab, Reproductive Medicine Center, Guangdong Second Provincial General Hospital, Guangzhou, 510317, China
| | - Lei-Ning Chen
- Fertility Preservation Lab, Reproductive Medicine Center, Guangdong Second Provincial General Hospital, Guangzhou, 510317, China
| | - Heide Schatten
- Department of Veterinary Pathobiology, University of Missouri, Columbia, MO 65211, USA
| | - Xiang-Hong Ou
- Fertility Preservation Lab, Reproductive Medicine Center, Guangdong Second Provincial General Hospital, Guangzhou, 510317, China
| | - Qing-Yuan Sun
- Fertility Preservation Lab, Reproductive Medicine Center, Guangdong Second Provincial General Hospital, Guangzhou, 510317, China; State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China.
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50
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