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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] [What about the content of this article? (0)] [Affiliation(s)] [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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2
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Zhang H, Su W, Zhao R, Li M, Zhao S, Chen Z, Zhao H. Epigallocatechin-3-gallate improves the quality of maternally aged oocytes. Cell Prolif 2024; 57:e13575. [PMID: 38010042 PMCID: PMC10984106 DOI: 10.1111/cpr.13575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 10/15/2023] [Accepted: 10/31/2023] [Indexed: 11/29/2023] Open
Abstract
The decline in female fertility as age advances is intricately linked to the diminished developmental potential of oocytes. Despite this challenge, the strategies available to enhance the quality of aged oocytes remain limited. Epigallocatechin-3-gallate (EGCG), characterised by its anti-inflammatory, antioxidant and tissue protective properties, holds promise as a candidate for improving the quality of maternally aged oocytes. In this study, we explored the precise impact and underlying mechanisms of EGCG on aged oocytes. EGCG exhibited the capacity to enhance the quality of aged oocytes both in vitro and in vivo. Specifically, the application of EGCG in vitro resulted in noteworthy improvements, including an increased rate of first polar body extrusion, enhanced mitochondrial function, refined spindle morphology and a reduction in oxidative stress. These beneficial effects were further validated by the improved fertility observed among aged mice. In addition, our findings propose that EGCG might augment the expression of Arf6. This augmentation, in turn, contributes to the assembly of spindle-associated F-actin, which can contribute to mitigate the aneuploidy induced by the disruption of spindle F-actin within aged oocytes. This work thus contributes not only to understanding the role of EGCG in bolstering oocyte health, but also underscores its potential as a therapeutic intervention to address fertility challenges associated with advanced age.
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Affiliation(s)
- HongHui Zhang
- State Key Laboratory of Reproductive Medicine and Offspring HealthShandong UniversityJinanChina
- The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Gusu SchoolNanjing Medical UniversityNanjingChina
- Key Laboratory of Reproductive Endocrinology of Ministry of EducationShandong UniversityJinanChina
- National Research Center for Assisted Reproductive Technology and Reproductive GeneticShandong UniversityJinanChina
- Research Unit of Gametogenesis and Health of ART‐Offspring, Chinese Academy of Medical Sciences (No.2021RU001)JinanChina
- Shandong Key Laboratory of Reproductive Medicine, Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinanChina
| | - Wei Su
- State Key Laboratory of Reproductive Medicine and Offspring HealthShandong UniversityJinanChina
- Key Laboratory of Reproductive Endocrinology of Ministry of EducationShandong UniversityJinanChina
- National Research Center for Assisted Reproductive Technology and Reproductive GeneticShandong UniversityJinanChina
- Research Unit of Gametogenesis and Health of ART‐Offspring, Chinese Academy of Medical Sciences (No.2021RU001)JinanChina
- Shandong Key Laboratory of Reproductive Medicine, Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinanChina
| | - RuSong Zhao
- State Key Laboratory of Reproductive Medicine and Offspring HealthShandong UniversityJinanChina
- The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Gusu SchoolNanjing Medical UniversityNanjingChina
- Key Laboratory of Reproductive Endocrinology of Ministry of EducationShandong UniversityJinanChina
- National Research Center for Assisted Reproductive Technology and Reproductive GeneticShandong UniversityJinanChina
- Research Unit of Gametogenesis and Health of ART‐Offspring, Chinese Academy of Medical Sciences (No.2021RU001)JinanChina
- Shandong Key Laboratory of Reproductive Medicine, Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinanChina
| | - Mei Li
- State Key Laboratory of Reproductive Medicine and Offspring HealthShandong UniversityJinanChina
- Key Laboratory of Reproductive Endocrinology of Ministry of EducationShandong UniversityJinanChina
- National Research Center for Assisted Reproductive Technology and Reproductive GeneticShandong UniversityJinanChina
- Research Unit of Gametogenesis and Health of ART‐Offspring, Chinese Academy of Medical Sciences (No.2021RU001)JinanChina
- Shandong Key Laboratory of Reproductive Medicine, Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinanChina
| | - ShiGang Zhao
- State Key Laboratory of Reproductive Medicine and Offspring HealthShandong UniversityJinanChina
- Key Laboratory of Reproductive Endocrinology of Ministry of EducationShandong UniversityJinanChina
- National Research Center for Assisted Reproductive Technology and Reproductive GeneticShandong UniversityJinanChina
- Research Unit of Gametogenesis and Health of ART‐Offspring, Chinese Academy of Medical Sciences (No.2021RU001)JinanChina
- Shandong Key Laboratory of Reproductive Medicine, Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinanChina
| | - Zi‐Jiang Chen
- State Key Laboratory of Reproductive Medicine and Offspring HealthShandong UniversityJinanChina
- Key Laboratory of Reproductive Endocrinology of Ministry of EducationShandong UniversityJinanChina
- National Research Center for Assisted Reproductive Technology and Reproductive GeneticShandong UniversityJinanChina
- Research Unit of Gametogenesis and Health of ART‐Offspring, Chinese Academy of Medical Sciences (No.2021RU001)JinanChina
- Shandong Key Laboratory of Reproductive Medicine, Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinanChina
- Shanghai Key Laboratory for Assisted Reproduction and Reproductive GeneticsShanghaiChina
- Center for Reproductive Medicine, Ren Ji Hospital, School of MedicineShanghai Jiao Tong UniversityShanghaiChina
| | - Han Zhao
- State Key Laboratory of Reproductive Medicine and Offspring HealthShandong UniversityJinanChina
- Key Laboratory of Reproductive Endocrinology of Ministry of EducationShandong UniversityJinanChina
- National Research Center for Assisted Reproductive Technology and Reproductive GeneticShandong UniversityJinanChina
- Research Unit of Gametogenesis and Health of ART‐Offspring, Chinese Academy of Medical Sciences (No.2021RU001)JinanChina
- Shandong Key Laboratory of Reproductive Medicine, Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinanChina
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3
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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] [What about the content of this article? (0)] [Affiliation(s)] [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 S, Aboelenain M, Ariad D, Haywood ME, Wageman CR, Duke M, Bag A, Viotti M, Katz-Jaffe M, McCoy RC, Schindler K, Xing J. Identifying risk variants for embryo aneuploidy using ultra-low coverage whole-genome sequencing from preimplantation genetic testing. Am J Hum Genet 2023; 110:2092-2102. [PMID: 38029743 PMCID: PMC10716496 DOI: 10.1016/j.ajhg.2023.11.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2023] [Revised: 11/08/2023] [Accepted: 11/08/2023] [Indexed: 12/01/2023] Open
Abstract
Aneuploidy frequently arises during human meiosis and is the primary cause of early miscarriage and in vitro fertilization (IVF) failure. Individuals undergoing IVF exhibit significant variability in aneuploidy rates, although the exact genetic causes of the variability in aneuploid egg production remain unclear. Preimplantation genetic testing for aneuploidy (PGT-A) using next-generation sequencing is a standard test for identifying and selecting IVF-derived euploid embryos. The wealth of embryo aneuploidy data and ultra-low coverage whole-genome sequencing (ulc-WGS) data from PGT-A have the potential to discover variants in parental genomes that are associated with aneuploidy risk in their embryos. Using ulc-WGS data from ∼10,000 PGT-A biopsies, we imputed genotype likelihoods of genetic variants in embryo genomes. We then used the imputed variants and embryo aneuploidy calls to perform a genome-wide association study of aneuploidy incidence. Finally, we carried out functional evaluation of the identified candidate gene in a mouse oocyte system. We identified one locus on chromosome 3 that is significantly associated with meiotic aneuploidy risk. One candidate gene, CCDC66, encompassed by this locus, is involved in chromosome segregation during meiosis. Using mouse oocytes, we showed that CCDC66 regulates meiotic progression and chromosome segregation fidelity, especially in older mice. Our work extended the research utility of PGT-A ulc-WGS data by allowing robust association testing and improved the understanding of the genetic contribution to maternal meiotic aneuploidy risk. Importantly, we introduce a generalizable method that has potential to be leveraged for similar association studies that use ulc-WGS data.
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Affiliation(s)
- Siqi Sun
- Department of Genetics, Rutgers, The State University of New Jersey, Piscataway, NJ, USA
| | - Mansour Aboelenain
- Department of Genetics, Rutgers, The State University of New Jersey, Piscataway, NJ, USA; Department of Theriogenology, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt
| | - Daniel Ariad
- Department of Biology, Johns Hopkins University, Baltimore, MD, USA
| | | | | | - Marlena Duke
- Department of Genetics, Rutgers, The State University of New Jersey, Piscataway, NJ, USA
| | - Aishee Bag
- Department of Genetics, Rutgers, The State University of New Jersey, Piscataway, NJ, USA
| | - Manuel Viotti
- Zouves Foundation for Reproductive Medicine, Foster City, CA, USA; Kindlabs, Kindbody, New York, NY, USA
| | | | - Rajiv C McCoy
- Department of Biology, Johns Hopkins University, Baltimore, MD, USA
| | - Karen Schindler
- Department of Genetics, Rutgers, The State University of New Jersey, Piscataway, NJ, USA; Human Genetics Institute of New Jersey, Rutgers, The State University of New Jersey, Piscataway, NJ, USA
| | - Jinchuan Xing
- Department of Genetics, Rutgers, The State University of New Jersey, Piscataway, NJ, USA; Human Genetics Institute of New Jersey, Rutgers, The State University of New Jersey, Piscataway, NJ, USA.
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5
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Klutstein M, Gonen N. Epigenetic aging of mammalian gametes. Mol Reprod Dev 2023; 90:785-803. [PMID: 37997675 DOI: 10.1002/mrd.23717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2022] [Revised: 11/09/2023] [Accepted: 11/12/2023] [Indexed: 11/25/2023]
Abstract
The process of aging refers to physiological changes that occur to an organism as time progresses and involves changes to DNA, proteins, metabolism, cells, and organs. Like the rest of the cells in the body, gametes age, and it is well established that there is a decline in reproductive capabilities in females and males with aging. One of the major pathways known to be involved in aging is epigenetic changes. The epigenome is the multitude of chemical modifications performed on DNA and chromatin that affect the ability of chromatin to be transcribed. In this review, we explore the effects of aging on female and male gametes with a focus on the epigenetic changes that occur in gametes throughout aging. Quality decline in oocytes occurs at a relatively early age. Epigenetic changes constitute an important part of oocyte aging. DNA methylation is reduced with age, along with reduced expression of DNA methyltransferases (DNMTs). Histone deacetylases (HDAC) expression is also reduced, and a loss of heterochromatin marks occurs with age. As a consequence of heterochromatin loss, retrotransposon expression is elevated, and aged oocytes suffer from DNA damage. In sperm, aging affects sperm number, motility and fecundity, and epigenetic changes may constitute a part of this process. 5 methyl-cytosine (5mC) methylation is elevated in sperm from aged men, but methylation on Long interspersed nuclear elements (LINE) elements is reduced. Di and trimethylation of histone 3 lysine 9 (H3K9me2/3) is reduced in sperm from aged men and trimethylation of histone 3 lysine 27 (H3K27me3) is elevated. The protamine makeup of sperm from aged men is also changed, with reduced protamine expression and a misbalanced ratio between protamine proteins protamine P1 and protamine P2. The study of epigenetic reproductive aging is recently gaining interest. The current status of the field suggests that many aspects of gamete epigenetic aging are still open for investigation. The clinical applications of these investigations have far-reaching consequences for fertility and sociological human behavior.
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Affiliation(s)
- Michael Klutstein
- Institute of Biomedical and Oral Research, Faculty of Dental Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Nitzan Gonen
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat Gan, Israel
- Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat Gan, Israel
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6
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Almalki SG. The pathophysiology of the cell cycle in cancer and treatment strategies using various cell cycle checkpoint inhibitors. Pathol Res Pract 2023; 251:154854. [PMID: 37864989 DOI: 10.1016/j.prp.2023.154854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 09/23/2023] [Accepted: 10/02/2023] [Indexed: 10/23/2023]
Abstract
The cell cycle is the series of events that occur in a cell leading to its division and duplication. It can be divided into two main stages: interphase and mitosis. Interphase is the longest stage of the cell cycle and can be further divided into three phases: G1, S, and G2. During G1, the cell grows and prepares for DNA synthesis. In the S phase, DNA synthesis occurs, leading to the replication of the genetic material. In G2, the cell continues to grow and prepares for mitosis. After mitosis, the cell enters the final stage of the cell cycle, called cytokinesis, during which the cytoplasm is divided, resulting in two separate daughter cells. The cell cycle then begins again with interphase. Cell cycle dysregulation is a hallmark of cancer, and it can have several consequences that contribute to the development and progression of cancer. Cyclin inhibitors and checkpoint activators have shown promise in the treatment of cancer, particularly in combination with other therapies.
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Affiliation(s)
- Sami G Almalki
- Department of Medical Laboratory Sciences, College of Applied Medical Sciences, Majmaah University, Majmaah 11952, Saudi Arabia.
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7
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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. Adv Sci (Weinh) 2023; 10:e2301538. [PMID: 37401155 PMCID: PMC10502832 DOI: 10.1002/advs.202301538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [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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8
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Lopez J, Hohensee G, Liang J, Sela M, Johnson J, Kallen AN. The Aging Ovary and the Tales Learned Since Fetal Development. Sex Dev 2023; 17:156-168. [PMID: 37598664 PMCID: PMC10841896 DOI: 10.1159/000532072] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Accepted: 07/13/2023] [Indexed: 08/22/2023] Open
Abstract
BACKGROUND While the term "aging" implies a process typically associated with later life, the consequences of ovarian aging are evident by the time a woman reaches her forties, and sometimes earlier. This is due to a gradual decline in the quantity and quality of oocytes which occurs over a woman's reproductive lifespan. Indeed, the reproductive potential of the ovary is established even before birth, as the proper formation and assembly of the ovarian germ cell population during fetal life determines the lifetime endowment of oocytes and follicles. In the ovary, sophisticated molecular processes have been identified that regulate the timing of ovarian aging and these are critical to ensuring follicular maintenance. SUMMARY The mechanisms thought to contribute to overall aging have been summarized under the term the "hallmarks of aging" and include such processes as DNA damage, mitochondrial dysfunction, telomere attrition, genomic instability, and stem cell exhaustion, among others. Similarly, in the ovary, molecular processes have been identified that regulate the timing of ovarian aging and these are critical to ensuring follicular maintenance. In this review, we outline critical processes involved in ovarian aging, highlight major achievements for treatment of ovarian aging, and discuss ongoing questions and areas of debate. KEY MESSAGES Ovarian aging is recognized as what may be a complex process in which age, genetics, environment, and many other factors contribute to the size and depletion of the follicle pool. The putative hallmarks of reproductive aging outlined herein include a diversity of plausible processes contributing to the depletion of the ovarian reserve. More research is needed to clarify if and to what extent these putative regulators do in fact govern follicle and oocyte behavior, and how these signals might be integrated in order to control the overall pattern of ovarian aging.
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Affiliation(s)
- Jesus Lopez
- Department of Obstetrics, Gynecology and Reproductive Sciences, Yale University School of Medicine, New Haven, CT, USA
| | - Gabe Hohensee
- Department of Obstetrics, Gynecology and Reproductive Sciences, Yale University School of Medicine, New Haven, CT, USA
| | - Jing Liang
- Department of Obstetrics, Gynecology and Reproductive Sciences, Yale University School of Medicine, New Haven, CT, USA
| | - Meirav Sela
- Department of Obstetrics, Gynecology and Reproductive Sciences, Yale University School of Medicine, New Haven, CT, USA
| | - Joshua Johnson
- Department of Obstetrics and Gynecology, University of Colorado Denver, Aurora, CO, USA
| | - Amanda N. Kallen
- Department of Obstetrics, Gynecology and Reproductive Sciences, Yale University School of Medicine, New Haven, CT, USA
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9
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Liu Y, Gao J. Reproductive aging: biological pathways and potential interventive strategies. J Genet Genomics 2023; 50:141-150. [PMID: 35840100 DOI: 10.1016/j.jgg.2022.07.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2022] [Revised: 07/01/2022] [Accepted: 07/05/2022] [Indexed: 11/30/2022]
Abstract
Reproductive aging is a natural process conserved across species and is well-known in females. It shows age-related follicle depletion and reduction of oocyte quality, eventually causing reproductive senescence and menopause. Although reproductive aging in males is not well noticed as in females, it also causes infertility and has deleterious consequences on the offspring. Various factors have been suggested to contribute to reproductive aging, including oxidative stress, mitochondrial defects, telomere shortening, meiotic chromosome segregation errors and genetic alterations. With the increasing trend of pregnancy age, it is particularly crucial to find interventions to preserve or extend human fertility. Studies in humans and model organisms have provided insights into the biological pathways associated with reproductive aging, and a series of potential interventive strategies have been tested. Here, we review factors affecting reproductive aging in females and males and summarize interventive strategies that may help delay or rescue the aging phenotypes of reproduction.
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Affiliation(s)
- Yuanyuan Liu
- Center for Cell Structure and Function, College of Life Sciences, Key Laboratory of Animal Resistance Biology of Shandong Province, Shandong Normal University, Jinan, Shandong 250014, China
| | - Jinmin Gao
- Center for Cell Structure and Function, College of Life Sciences, Key Laboratory of Animal Resistance Biology of Shandong Province, Shandong Normal University, Jinan, Shandong 250014, China.
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Marchante M, Buigues A, Ramirez-Martin N, Martinez J, Pellicer N, Pellicer A, Herraiz S. Single intraovarian dose of stem cell- and platelet-secreted factors mitigates age-related ovarian infertility in a murine model. Am J Obstet Gynecol 2023; 228:561.e1-561.e17. [PMID: 36706857 DOI: 10.1016/j.ajog.2023.01.018] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 01/13/2023] [Accepted: 01/14/2023] [Indexed: 01/26/2023]
Abstract
BACKGROUND Systemic administration of soluble factors from bone marrow-derived stem cells combined with activated platelet-rich plasma (SC-PRP) restored ovarian function, mediated through paracrine signaling, in murine models of chemotherapy-induced ovarian damage and human tissue from poor responder patients. However, the effects against age-related infertility and the efficacy of local administration have not been evaluated yet. OBJECTIVE This study aimed to assess whether a single intraovarian dose of stem cells combined with activated platelet-rich plasma can recover ovarian function, oocyte quality, and developmental competence in older mice. STUDY DESIGN The effects of stem cells combined with activated platelet-rich plasma against age-related infertility were assessed following controlled ovarian stimulation in an aging murine model reproducing 3 physiological stages of women's reproductive life, namely young, advanced maternal age, and menopausal (n=12 animals per group). Female mice were randomized to receive a single intraovarian injection (10 μL/ovary) of either saline, activated platelet-rich plasma, or stem cells combined with activated platelet-rich plasma. Seven days later, the mice were stimulated, naturally mated, and sacrificed to harvest their ovaries for histologic assessment and molecular analysis and their oviducts to evaluate oocyte maturation and to assess early embryo development. RESULTS A single intraovarian injection of stem cells combined with activated platelet-rich plasma promoted follicle activation and development in young, advanced maternal age, and old mice. Furthermore, stem cells combined with activated platelet-rich plasma rescued fertility in older mice by enhancing the quantity and quality of ovulated mature oocytes and supporting early embryo development to the blastocyst stage in all the evaluated ages. These fertility outcomes were positively associated with mitochondrial quality, treatment-increased mitochondrial DNA copy numbers, and reduced oxidative damage and apoptosis. Finally, the effects observed by histologic analysis were supported at the proteomic level. Functional proteomic analyses revealed molecular mechanisms involved in oocyte maturation and quality, mitochondrial function, and recovery of the ovarian stroma. CONCLUSION Bone marrow-derived stem cells combined with activated platelet-rich plasma is a promising treatment with the potential to improve the reproductive outcomes of women with age-related infertility, exceeding the restorative effects of platelet-rich plasma alone. Although further research in human ovarian samples is still required, the autologous nature of stem cell factors collected by noninvasive mobilization, their combination with platelet-rich plasma, and the local administration route suggest that stem cells combined with activated platelet-rich plasma treatment could be a potentially effective and safe application for future clinical practice.
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Affiliation(s)
- María Marchante
- IVI Foundation, Valencia, Spain; Department of Pediatrics, Obstetrics and Gynecology, Faculty of Medicine, University of Valencia, Valencia, Spain
| | - Anna Buigues
- IVI Foundation, Valencia, Spain; Reproductive Medicine Research Group, Instituto Investigación Sanitaria La Fe (IIS la Fe), Valencia, Spain
| | - Noelia Ramirez-Martin
- IVI Foundation, Valencia, Spain; Reproductive Medicine Research Group, Instituto Investigación Sanitaria La Fe (IIS la Fe), Valencia, Spain
| | - Jessica Martinez
- IVI Foundation, Valencia, Spain; Reproductive Medicine Research Group, Instituto Investigación Sanitaria La Fe (IIS la Fe), Valencia, Spain
| | - Nuria Pellicer
- Reproductive Medicine Research Group, Instituto Investigación Sanitaria La Fe (IIS la Fe), Valencia, Spain
| | - Antonio Pellicer
- Reproductive Medicine Research Group, Instituto Investigación Sanitaria La Fe (IIS la Fe), Valencia, Spain; IVI-RMA Valencia, Valencia, Spain; IVI-RMA Rome, Rome, Italy
| | - Sonia Herraiz
- IVI Foundation, Valencia, Spain; Reproductive Medicine Research Group, Instituto Investigación Sanitaria La Fe (IIS la Fe), Valencia, Spain.
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11
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Gai Y, He ZJ, Wang SG, Wang N, Ge ZJ, Huang G, Shen W, Yin S, Zhao M. Epigallocatechin gallate improves meiosis maturation against Diazinon exposure in porcine oocytes. Theriogenology 2023; 196:1-9. [PMID: 36371914 DOI: 10.1016/j.theriogenology.2022.09.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 09/12/2022] [Accepted: 09/14/2022] [Indexed: 12/13/2022]
Abstract
Diazinon (DZN) is a refractory organophosphorus pesticide (OP) in the surrounding environment due to its overuse in agriculture. The antioxidant activity of Epigallocatechin gallate (EGCG) from green tea is at least 100 times greater than that of vitamin C. This study aimed to study the effects of DZN on the meiotic maturation of porcine oocytes, as well as the protective roles of EGCG. Firstly, the effects of DZN and EGCG on meiotic nuclear maturation of porcine oocytes were detected, and then embryonic development was investigated by chemical parthenogenetic activation. Next, the spindle assembly, mitochondrial membrane potential (MMP), reactive oxygen species (ROS), DNA damage, and finally the early apoptosis of oocytes were examined by immunofluorescence staining. The results revealed that DZN exposure significantly reduced the quality of porcine oocytes, such as failure of nuclear and cytoplasmic maturation, evidenced by abnormal spindle assembly, disordered chromosome alignment, low MMP, observably increased ROS, severe DNA damage, and early apoptosis. Appropriate EGCG could significantly reduce all these defects caused by DZN. In conclusion, EGCG can help prevent the harm that DZN exposure can do. These findings offer convincing support for enhancing the oocyte quality from EGCG through daily ordinary beverages.
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Affiliation(s)
- Yang Gai
- College of Life Sciences, Institute of Reproductive Science, Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, International Science and Technology Cooperation Base of Animal Developmental Biology, Qingdao Agricultural University, Qingdao, 266109, China
| | - Zhao-Jie He
- College of Life Sciences, Institute of Reproductive Science, Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, International Science and Technology Cooperation Base of Animal Developmental Biology, Qingdao Agricultural University, Qingdao, 266109, China
| | - Shao-Ge Wang
- College of Life Sciences, Institute of Reproductive Science, Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, International Science and Technology Cooperation Base of Animal Developmental Biology, Qingdao Agricultural University, Qingdao, 266109, China
| | - Ning Wang
- College of Life Sciences, Institute of Reproductive Science, Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, International Science and Technology Cooperation Base of Animal Developmental Biology, Qingdao Agricultural University, Qingdao, 266109, China
| | - Zhao-Jia Ge
- College of Life Sciences, Institute of Reproductive Science, Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, International Science and Technology Cooperation Base of Animal Developmental Biology, Qingdao Agricultural University, Qingdao, 266109, China
| | - Guian Huang
- College of Life Sciences, Institute of Reproductive Science, Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, International Science and Technology Cooperation Base of Animal Developmental Biology, Qingdao Agricultural University, Qingdao, 266109, China
| | - Wei Shen
- College of Life Sciences, Institute of Reproductive Science, Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, International Science and Technology Cooperation Base of Animal Developmental Biology, Qingdao Agricultural University, Qingdao, 266109, China
| | - Shen Yin
- College of Life Sciences, Institute of Reproductive Science, Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, International Science and Technology Cooperation Base of Animal Developmental Biology, Qingdao Agricultural University, Qingdao, 266109, China.
| | - Minghui Zhao
- College of Life Sciences, Institute of Reproductive Science, Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, International Science and Technology Cooperation Base of Animal Developmental Biology, Qingdao Agricultural University, Qingdao, 266109, China.
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12
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Gao M, Qiu Y, Cao T, Li D, Wang J, Jiao Y, Chen Z, Huang J. Insufficient HtrA2 causes meiotic defects in aging germinal vesicle oocytes. Reprod Biol Endocrinol 2022; 20:173. [PMID: 36539842 PMCID: PMC9764539 DOI: 10.1186/s12958-022-01048-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/16/2022] [Accepted: 12/09/2022] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND High-temperature requirement protease A2 (HtrA2/Omi) is a mitochondrial chaperone that is highly conserved from bacteria to humans. It plays an important role in mitochondrial homeostasis and apoptosis. In this study, we investigated the role of HtrA2 in mouse oocyte maturation. METHODS The role of HtrA2 in mouse oocyte maturation was investigated by employing knockdown (KD) or overexpression (OE) of HtrA2 in young or old germinal vesicle (GV) oocytes. We employed immunoblotting, immunostaining, fluorescent intensity quantification to test the HtrA2 knockdown on the GV oocyte maturation progression, spindle assembly checkpoint, mitochondrial distribution, spindle organization, chromosome alignment, actin polymerization, DNA damage and chromosome numbers and acetylated tubulin levels. RESULTS We observed a significant reduction in HtrA2 protein levels in aging germinal vesicle (GV) oocytes. Young oocytes with low levels of HtrA2 due to siRNA knockdown were unable to complete meiosis and were partially blocked at metaphase I (MI). They also displayed significantly more BubR1 on kinetochores, indicating that the spindle assembly checkpoint was triggered at MI. Extrusion of the first polar body (Pb1) was significantly less frequent and oocytes with large polar bodies were observed when HtrA2 was depleted. In addition, HtrA2 knockdown induced meiotic spindle/chromosome disorganization, leading to aneuploidy at metaphase II (MII), possibly due to the elevated level of acetylated tubulin. Importantly, overexpression of HtrA2 partially rescued spindle/chromosome disorganization and reduced the rate of aneuploidy in aging GV oocytes. CONCLUSIONS Collectively, our data suggest that HtrA2 is a key regulator of oocyte maturation, and its deficiency with age appears to contribute to reproduction failure in females.
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Affiliation(s)
- Min Gao
- MOE Key Laboratory of Gene Function and Regulation, State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, China
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 51000, China
- Key Laboratory of Reproductive Medicine of Guangdong Province, School of Life Sciences and the First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510275, China
| | - Yanling Qiu
- MOE Key Laboratory of Gene Function and Regulation, State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, China
- Key Laboratory of Reproductive Medicine of Guangdong Province, School of Life Sciences and the First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510275, China
| | - Tianqi Cao
- MOE Key Laboratory of Gene Function and Regulation, State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, China
- Key Laboratory of Reproductive Medicine of Guangdong Province, School of Life Sciences and the First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510275, China
| | - Dungao Li
- The Reproduction Medicine Center of Hui Zhou Municipal Central Hospital, Huizhou, 516001, China
| | - Jingwen Wang
- MOE Key Laboratory of Gene Function and Regulation, State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, China
- Key Laboratory of Reproductive Medicine of Guangdong Province, School of Life Sciences and the First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510275, China
| | - Yiren Jiao
- MOE Key Laboratory of Gene Function and Regulation, State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, China
- Key Laboratory of Reproductive Medicine of Guangdong Province, School of Life Sciences and the First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510275, China
| | - Zhiyun Chen
- The Reproduction Medicine Center of Hui Zhou Municipal Central Hospital, Huizhou, 516001, China.
| | - Junjiu Huang
- MOE Key Laboratory of Gene Function and Regulation, State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, China.
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 51000, China.
- Key Laboratory of Reproductive Medicine of Guangdong Province, School of Life Sciences and the First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510275, China.
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Maudsley S, Walter D, Schrauwen C, Van Loon N, Harputluoğlu İ, Lenaerts J, McDonald P. Intersection of the Orphan G Protein-Coupled Receptor, GPR19, with the Aging Process. Int J Mol Sci 2022; 23:ijms232113598. [PMID: 36362387 PMCID: PMC9653598 DOI: 10.3390/ijms232113598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 11/02/2022] [Accepted: 11/03/2022] [Indexed: 11/09/2022] Open
Abstract
G protein-coupled receptors (GPCRs) represent one of the most functionally diverse classes of transmembrane proteins. GPCRs and their associated signaling systems have been linked to nearly every physiological process. They also constitute nearly 40% of the current pharmacopeia as direct targets of remedial therapies. Hence, their place as a functional nexus in the interface between physiological and pathophysiological processes suggests that GPCRs may play a central role in the generation of nearly all types of human disease. Perhaps one mechanism through which GPCRs can mediate this pivotal function is through the control of the molecular aging process. It is now appreciated that, indeed, many human disorders/diseases are induced by GPCR signaling processes linked to pathological aging. Here we discuss one such novel member of the GPCR family, GPR19, that may represent an important new target for novel remedial strategies for the aging process. The molecular signaling pathways (metabolic control, circadian rhythm regulation and stress responsiveness) associated with this recently characterized receptor suggest an important role in aging-related disease etiology.
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Affiliation(s)
- Stuart Maudsley
- Receptor Biology Lab, University of Antwerp, 2610 Antwerpen, Belgium
- Correspondence:
| | - Deborah Walter
- Receptor Biology Lab, University of Antwerp, 2610 Antwerpen, Belgium
| | - Claudia Schrauwen
- Receptor Biology Lab, University of Antwerp, 2610 Antwerpen, Belgium
| | - Nore Van Loon
- Receptor Biology Lab, University of Antwerp, 2610 Antwerpen, Belgium
| | - İrem Harputluoğlu
- Receptor Biology Lab, University of Antwerp, 2610 Antwerpen, Belgium
| | - Julia Lenaerts
- Receptor Biology Lab, University of Antwerp, 2610 Antwerpen, Belgium
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Wu T, Gu H, Luo Y, Wang L, Sang Q. Meiotic defects in human oocytes: Potential causes and clinical implications. Bioessays 2022; 44:e2200135. [PMID: 36207289 DOI: 10.1002/bies.202200135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 09/14/2022] [Accepted: 09/16/2022] [Indexed: 11/09/2022]
Abstract
Meiotic defects cause abnormal chromosome segregation leading to aneuploidy in mammalian oocytes. Chromosome segregation is particularly error-prone in human oocytes, but the mechanisms behind such errors remain unclear. To explain the frequent chromosome segregation errors, recent investigations have identified multiple meiotic defects and explained how these defects occur in female meiosis. In particular, we review the causes of cohesin exhaustion, leaky spindle assembly checkpoint (SAC), inherently unstable meiotic spindle, fragmented kinetochores or centromeres, abnormal aurora kinases (AURK), and clinical genetic variants in human oocytes. We mainly focus on meiotic defects in human oocytes, but also refer to the potential defects of female meiosis in mouse models.
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Affiliation(s)
- Tianyu Wu
- Institute of Pediatrics, Children's Hospital of Fudan University and Institutes of Biomedical Sciences, the State Key Laboratory of Genetic Engineering, Fudan University, Shanghai, China
| | - Hao Gu
- Institute of Pediatrics, Children's Hospital of Fudan University and Institutes of Biomedical Sciences, the State Key Laboratory of Genetic Engineering, Fudan University, Shanghai, China
| | - Yuxi Luo
- Institute of Pediatrics, Children's Hospital of Fudan University and Institutes of Biomedical Sciences, the State Key Laboratory of Genetic Engineering, Fudan University, Shanghai, China
| | - Lei Wang
- Institute of Pediatrics, Children's Hospital of Fudan University and Institutes of Biomedical Sciences, the State Key Laboratory of Genetic Engineering, Fudan University, Shanghai, China
| | - Qing Sang
- Institute of Pediatrics, Children's Hospital of Fudan University and Institutes of Biomedical Sciences, the State Key Laboratory of Genetic Engineering, Fudan University, Shanghai, China
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15
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Kratka C, Drutovic D, Blengini CS, Schindler K. Using ZINC08918027 inhibitor to determine Aurora kinase-chromosomal passenger complex isoforms in mouse oocytes. BMC Res Notes 2022; 15:96. [PMID: 35255953 PMCID: PMC8900367 DOI: 10.1186/s13104-022-05987-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Accepted: 02/28/2022] [Indexed: 11/17/2022] Open
Abstract
Objective Miscarriages affect 10% of women aged 25–29, and 53% of women over 45. The primary cause of miscarriage is aneuploidy that originated in eggs. The Aurora kinase family has three members that regulate chromosome segregation. Therefore, distinguishing the roles of these isoforms is important to understand aneuploidy etiology. In meiosis, Aurora kinase A (AURKA) localizes to spindle poles, where it binds TPX2. Aurora kinase C (AURKC) localizes on chromosomes, where it replaces AURKB as the primary AURK in the chromosomal passenger complex (CPC) via INCENP binding. Although AURKA compensates for CPC function in oocytes lacking AURKB/C, it is unknown whether AURKA binds INCENP in wild type mouse oocytes. ZINC08918027 (ZC) is an inhibitor that prevents the interaction between AURKB and INCENP in mitotic cells. We hypothesized that ZC would block CPC function of any AURK isoform. Results ZC treatment caused defects in meiotic progression and spindle building. By Western blotting and immunofluorescence, we observed that activated AURKA and AURKC levels in ZC-treated oocytes decreased compared to controls. These results suggest there is a population of AURKA-CPC in mouse oocytes. These data together suggest that INCENP-dependent AURKA and AURKC activities are needed for spindle bipolarity and meiotic progression. Supplementary Information The online version contains supplementary material available at 10.1186/s13104-022-05987-4.
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16
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Wasielak-Politowska M, Kordowitzki P. Chromosome Segregation in the Oocyte: What Goes Wrong during Aging. Int J Mol Sci 2022; 23:2880. [PMID: 35270022 DOI: 10.3390/ijms23052880] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 02/22/2022] [Accepted: 03/05/2022] [Indexed: 12/13/2022] Open
Abstract
Human female fertility and reproductive lifespan decrease significantly with age, resulting in an extended post-reproductive period. The central dogma in human female reproduction contains two important aspects. One is the pool of oocytes in the human ovary (the ovarian reserve; approximately 106 at birth), which diminishes throughout life until menopause around the age of 50 (approximately 103 oocytes) in women. The second is the quality of oocytes, including the correctness of meiotic divisions, among other factors. Notably, the increased rate of sub- and infertility, aneuploidy, miscarriages, and birth defects are associated with advanced maternal age, especially in women above 35 years of age. This postponement is also relevant for human evolution; decades ago, the female aging-related fertility drop was not as important as it is today because women were having their children at a younger age. Spindle assembly is crucial for chromosome segregation during each cell division and oocyte maturation, making it an important event for euploidy. Consequently, aberrations in this segregation process, especially during the first meiotic division in human eggs, can lead to implantation failure or spontaneous abortion. Today, human reproductive medicine is also facing a high prevalence of aneuploidy, even in young females. However, the shift in the reproductive phase of humans and the strong increase in errors make the problem much more dramatic at later stages of the female reproductive phase. Aneuploidy in human eggs could be the result of the non-disjunction of entire chromosomes or sister chromatids during oocyte meiosis, but partial or segmental aneuploidies are also relevant. In this review, we intend to describe the relevance of the spindle apparatus during oocyte maturation for proper chromosome segregation in the context of maternal aging and the female reproductive lifespan.
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Blengini CS, Nguyen AL, Aboelenain M, Schindler K. Age-dependent integrity of the meiotic spindle assembly checkpoint in females requires Aurora kinase B. Aging Cell 2021; 20:e13489. [PMID: 34704342 PMCID: PMC8590096 DOI: 10.1111/acel.13489] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 08/09/2021] [Accepted: 09/01/2021] [Indexed: 12/21/2022] Open
Abstract
A hallmark of advanced maternal age is a significant increase in meiotic chromosome segregation errors, resulting in early miscarriages and congenital disorders. These errors most frequently occur during meiosis I (MI). The spindle assembly checkpoint (SAC) prevents chromosome segregation errors by arresting the cell cycle until proper chromosome alignment is achieved. Unlike in mitosis, the SAC in oocytes is desensitized, allowing chromosome segregation in the presence of improperly aligned chromosomes. Whether SAC integrity further deteriorates with advancing maternal age, and if this decline contributes to increased segregation errors remains a fundamental question. In somatic cells, activation of the SAC depends upon Aurora kinase B (AURKB), which functions to monitor kinetochore–microtubule attachments and recruit SAC regulator proteins. In mice, oocyte‐specific deletion of AURKB (Aurkb cKO) results in an increased production of aneuploid metaphase II‐arrested eggs and premature age‐related infertility. Here, we aimed to understand the cause of the short reproductive lifespan and hypothesized that SAC integrity was compromised. In comparing oocytes from young and sexually mature Aurkb cKO females, we found that SAC integrity becomes compromised rapidly with maternal age. We show that the increased desensitization of the SAC is driven by reduced expression of MAD2, ZW10 and Securin proteins, key contributors to the SAC response pathway. The reduced expression of these proteins is the result of altered protein homeostasis, likely caused by the accumulation of reactive oxygen species. Taken together, our results demonstrate a novel function for AURKB in preserving the female reproductive lifespan possibly by protecting oocytes from oxidative stress.
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Affiliation(s)
- Cecilia S. Blengini
- Department of Genetics; Rutgers The State University of New Jersey Piscataway NJ USA
- Human Genetics Institute of New Jersey Piscataway NJ USA
| | - Alexandra L. Nguyen
- Department of Genetics; Rutgers The State University of New Jersey Piscataway NJ USA
- Human Genetics Institute of New Jersey Piscataway NJ USA
| | - Mansour Aboelenain
- Department of Genetics; Rutgers The State University of New Jersey Piscataway NJ USA
- Human Genetics Institute of New Jersey Piscataway NJ USA
- Department of Theriogenology Faculty of Veterinary Medicine Mansoura University Mansoura Egypt
| | - Karen Schindler
- Department of Genetics; Rutgers The State University of New Jersey Piscataway NJ USA
- Human Genetics Institute of New Jersey Piscataway NJ USA
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