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Jiao Y, Bei C, Wang Y, Liao A, Guo J, Li X, Jiang T, Liu X, Chen Y, Cong P, He Z. Bone morphogenetic protein 15 gene disruption affects the in vitro maturation of porcine oocytes by impairing spindle assembly and organelle function. Int J Biol Macromol 2024; 267:131417. [PMID: 38582457 DOI: 10.1016/j.ijbiomac.2024.131417] [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: 02/02/2024] [Revised: 04/03/2024] [Accepted: 04/03/2024] [Indexed: 04/08/2024]
Abstract
Bone morphogenetic protein 15 (BMP15) plays a crucial role in the porcine follicular development. However, its exact functions in the in vitro maturation (IVM) of porcine oocytes remain largely unknown. Here, through cytoplasmic injection of a preassembled crRNA-tracrRNA-Cas9 ribonucleoprotein complex, we achieved BMP15 disruption in approximately 54 % of the cultured porcine oocytes. Editing BMP15 impaired the IVM of porcine oocytes, as indicated by the significantly increased abnormal spindle assembly and reduced first polar body (PB1) extrusion. The editing also impaired cytoplasmic maturation of porcine oocytes, as reflected by reduced abundant of Golgi apparatus and impaired functions of mitochondria. The impaired IVM of porcine oocytes by editing BMP15 possibly was associated with the attenuated SMAD1/5 and EGFR-ERK1/2 signaling in the cumulus granulosa cells (CGCs) and the inhibited MOS/ERK1/2 signaling in oocytes. The attenuated MOS/ERK1/2 signaling may contribute to the inactivation of maturation promoting factor (MPF) and the increased abnormal spindle assembly, leading to reduced PB1 extrusion. It also may contribute to reduced Golgi apparatus formation, and impaired functions of mitochondria. These findings expand our understanding of the regulatory role of BMP15 in the IVM of porcine oocytes and provide a basis for manipulation of porcine reproductive performance.
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Affiliation(s)
- Yafei Jiao
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, Guangdong 510275, China
| | - Chang Bei
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, Guangdong 510275, China
| | - Yixian Wang
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, Guangdong 510275, China
| | - Alian Liao
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, Guangdong 510275, China
| | - Jinming Guo
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, Guangdong 510275, China
| | - Xinran Li
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, Guangdong 510275, China
| | - Tiantuan Jiang
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, Guangdong 510275, China
| | - Xiaohong Liu
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, Guangdong 510275, China
| | - Yaosheng Chen
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, Guangdong 510275, China
| | - Peiqing Cong
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, Guangdong 510275, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, Guangdong 510642, China.
| | - Zuyong He
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, Guangdong 510275, China.
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Gokyer D, Akinboro S, Zhou LT, Kleinhans A, Laronda MM, Duncan FE, Riley JK, Goldman KN, Babayev E. The oocyte microenvironment is altered in adolescents compared to oocyte donors. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.04.04.588118. [PMID: 38617323 PMCID: PMC11014529 DOI: 10.1101/2024.04.04.588118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/16/2024]
Abstract
Study question Are the molecular signatures of cumulus cells (CCs) and follicular fluid (FF) of adolescents undergoing fertility preservation differ from that of reproductively adult oocyte donors? Summary answer The microenvironment immediately surrounding the oocyte, including the CCs and FF, is altered in adolescents undergoing fertility preservation compared to oocyte donors. What is known already Adolescents experience a period of subfecundity following menarche. Recent evidence suggests that this may be at least partially due to increased oocyte aneuploidy. Reproductive juvenescence in mammals is associated with suboptimal oocyte quality. Study design size duration This was a prospective cohort study. Adolescents (10-19 years old, N=23) and oocyte donors (22-30 years old, N=31) undergoing ovarian stimulation and oocyte retrieval at the Northwestern Fertility and Reproductive Medicine Center between November 1, 2020 and May 1, 2023 were enrolled in this study. Participants/materials setting methods Patient demographics, ovarian stimulation, and oocyte retrieval outcomes were collected for all participants. The transcriptome of CCs associated with mature oocytes was compared between adolescents (10-19 years old, n=19), and oocyte donors (22-30 years old, n=19) using bulk RNA-sequencing. FF cytokine profiles (10-19 years old, n=18 vs. 25-30 years old, n=16) were compared using cytokine arrays. Main results and the role of chance RNA-seq analysis revealed 581 differentially expressed genes (DEGs) in cumulus cells of adolescents relative to oocyte donors, with 361 genes downregulated and 220 upregulated. Genes enriched in pathways involved in cell cycle and cell division (e.g., GO:1903047, p= 3.5 × 10-43; GO:0051983, p= 4.1 × 10-30; GO:0000281, p= 7.7 × 10-15; GO:0044839, p= 5.3 × 10-13) were significantly downregulated, while genes enriched in several pathways involved in cellular and vesicle organization (e.g., GO:0010256, p= 1.2 × 10-8; GO:0051129, p= 6.8 × 10-7; GO:0016050, p= 7.4 × 10-7; GO:0051640, p= 8.1 × 10-7) were upregulated in CCs of adolescents compared to oocyte donors. The levels of 9 cytokines were significantly increased in FF of adolescents compared to oocyte donors: IL-1 alpha (2-fold), IL-1 beta (1.7-fold), I-309 (2-fold), IL-15 (1.6-fold), TARC (1.9-fold), TPO (2.1-fold), IGFBP-4 (2-fold), IL-12-p40 (1.7-fold) and ENA-78 (1.4-fold). Interestingly, 7 of these cytokines have known pro-inflammatory roles. Importantly, neither the CC transcriptomes or FF cytokine profiles were different in adolescents with or without cancer. Large scale data Original high-throughput sequencing data will be deposited in Gene Expression Omnibus (GEO) before publication, and the GEO accession number will be provided here. Limitations reasons for caution This study aims to gain insights into the associated gamete quality by studying the immediate oocyte microenvironment. The direct study of oocytes is more challenging due to sample scarcity, as they are cryopreserved for future use, but will provide a more accurate assessment of oocyte reproductive potential. Wider implications of the findings Understanding the underpinnings of altered immediate oocyte microenvironment of adolescent patients may provide insights into the reproductive potential of the associated gametes in the younger end of the age spectrum. This has implications for the fertility preservation cycles for very young patients. Study funding/competing interests This project was supported by Friends of Prentice organization SP0061324 (M.M.L and E.B.), Gesualdo Family Foundation (Research Scholar: M.M.L.), and NIH/NICHD K12 HD050121 (E.B.). The authors have declared that no conflict of interest exists.
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Affiliation(s)
- Dilan Gokyer
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611
| | - Sophia Akinboro
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611
- Weinberg College of Arts and Sciences, Northwestern University, Evanston, IL, 60208
| | - Luhan T. Zhou
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611
| | - Anna Kleinhans
- Department of Obstetrics and Gynecology, Northwestern Medicine Center for Fertility and Reproductive Medicine, Chicago, IL, 60611
| | - Monica M. Laronda
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611
- Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611
- Stanley Manne Children’s Research Institute, Ann & Robert H. Lurie Children’s Hospital of Chicago, Chicago, IL, 60611
| | - Francesca E. Duncan
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611
| | - Joan K. Riley
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611
- Department of Obstetrics and Gynecology, Northwestern Medicine Center for Fertility and Reproductive Medicine, Chicago, IL, 60611
| | - Kara N. Goldman
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611
- Department of Obstetrics and Gynecology, Northwestern Medicine Center for Fertility and Reproductive Medicine, Chicago, IL, 60611
| | - Elnur Babayev
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611
- Department of Obstetrics and Gynecology, Northwestern Medicine Center for Fertility and Reproductive Medicine, Chicago, IL, 60611
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Babayev E, Suebthawinkul C, Gokyer D, Parkes WS, Rivas F, Pavone ME, Hall AR, Pritchard MT, Duncan FE. Cumulus expansion is impaired with advanced reproductive age due to loss of matrix integrity and reduced hyaluronan. Aging Cell 2023; 22:e14004. [PMID: 37850336 PMCID: PMC10652338 DOI: 10.1111/acel.14004] [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: 05/29/2023] [Revised: 09/08/2023] [Accepted: 09/14/2023] [Indexed: 10/19/2023] Open
Abstract
Reproductive aging is associated with ovulatory defects. Age-related ovarian fibrosis partially contributes to this phenotype as short-term treatment with anti-fibrotic compounds improves ovulation in reproductively old mice. However, age-dependent changes that are intrinsic to the follicle may also be relevant. In this study, we used a mouse model to demonstrate that reproductive aging is associated with impaired cumulus expansion which is accompanied by altered morphokinetic behavior of cumulus cells as assessed by time-lapse microscopy. The extracellular matrix integrity of expanded cumulus-oocyte complexes is compromised with advanced age as evidenced by increased penetration of fluorescent nanoparticles in a particle exclusion assay and larger open spaces on scanning electron microscopy. Reduced hyaluronan (HA) levels, decreased expression of genes encoding HA-associated proteins (e.g., Ptx3 and Tnfaip6), and increased expression of inflammatory genes and matrix metalloproteinases underlie this loss of matrix integrity. Importantly, HA levels are decreased with age in follicular fluid of women, indicative of conserved reproductive aging mechanisms. These findings provide novel mechanistic insights into how defects in cumulus expansion contribute to age-related infertility and may serve as a target to extend reproductive longevity.
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Affiliation(s)
- Elnur Babayev
- Department of Obstetrics and Gynecology, Feinberg School of MedicineNorthwestern UniversityChicagoIllinoisUSA
| | - Chanakarn Suebthawinkul
- Department of Obstetrics and Gynecology, Feinberg School of MedicineNorthwestern UniversityChicagoIllinoisUSA
- Department of Obstetrics and Gynecology, Faculty of MedicineChulalongkorn UniversityBangkokThailand
| | - Dilan Gokyer
- Department of Obstetrics and Gynecology, Feinberg School of MedicineNorthwestern UniversityChicagoIllinoisUSA
| | - Wendena S. Parkes
- Department of Pharmacology, Toxicology, & Therapeutics, Institute for Reproductive and Developmental SciencesUniversity of Kansas Medical CenterKansas CityKansasUSA
| | - Felipe Rivas
- Virginia Tech‐Wake Forest University School of Biomedical Engineering and SciencesWake Forest School of MedicineWinston‐SalemNorth CarolinaUSA
| | - Mary Ellen Pavone
- Department of Obstetrics and Gynecology, Feinberg School of MedicineNorthwestern UniversityChicagoIllinoisUSA
| | - Adam R. Hall
- Virginia Tech‐Wake Forest University School of Biomedical Engineering and SciencesWake Forest School of MedicineWinston‐SalemNorth CarolinaUSA
| | - Michele T. Pritchard
- Department of Pharmacology, Toxicology, & Therapeutics, Institute for Reproductive and Developmental SciencesUniversity of Kansas Medical CenterKansas CityKansasUSA
| | - Francesca E. Duncan
- Department of Obstetrics and Gynecology, Feinberg School of MedicineNorthwestern UniversityChicagoIllinoisUSA
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Lee M, Youn E, Kang K, Shim YH. 3,3'-Diindolylmethane Supplementation Maintains Oocyte Quality by Reducing Oxidative Stress and CEP-1/p53-Mediated Regulation of Germ Cells in a Reproductively Aged Caenorhabditis elegans Model. Antioxidants (Basel) 2022; 11:950. [PMID: 35624814 PMCID: PMC9137721 DOI: 10.3390/antiox11050950] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 05/06/2022] [Accepted: 05/08/2022] [Indexed: 11/20/2022] Open
Abstract
In recent decades, maternal age at first birth has increased, as has the risk of infertility due to rapidly declining oocyte quality with age. Therefore, an understanding of female reproductive aging and the development of potential modulators to control oocyte quality are required. In this study, we investigated the effects of 3,3'-diindolylmethane (DIM), a natural metabolite of indole-3-cabinol found in cruciferous vegetables, on fertility in a Caenorhabditis elegans model. C. elegans fed DIM showed decreased mitochondrial dysfunction, oxidative stress, and chromosomal aberrations in aged oocytes, and thus reduced embryonic lethality, suggesting that DIM, a dietary natural antioxidant, improves oocyte quality. Furthermore, DIM supplementation maintained germ cell apoptosis (GCA) and germ cell proliferation (GCP) in a CEP-1/p53-dependent manner in a reproductively aged C. elegans germ line. DIM-induced GCA was mediated by the CEP-1-EGL-1 pathway without HUS-1 activation, suggesting that DIM-induced GCA is different from DNA damage-induced GCA in the C. elegans germ line. Taken together, we propose that DIM supplementation delays the onset of reproductive aging by maintaining the levels of GCP and GCA and oocyte quality in a reproductively aged C. elegans.
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Affiliation(s)
- Mijin Lee
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 05029, Korea; (M.L.); (E.Y.)
| | - Esther Youn
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 05029, Korea; (M.L.); (E.Y.)
| | - Kyungsu Kang
- Natural Product Informatics Research Center, Korea Institute of Science and Technology, Gangneung 25451, Gangwon-do, Korea;
| | - Yhong-Hee Shim
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 05029, Korea; (M.L.); (E.Y.)
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5
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Schatten H. Centrosomes in Reproduction. THE CENTROSOME AND ITS FUNCTIONS AND DYSFUNCTIONS 2022; 235:55-73. [DOI: 10.1007/978-3-031-20848-5_6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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6
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Nicotinamide Supplementation Improves Oocyte Quality and Offspring Development by Modulating Mitochondrial Function in an Aged Caenorhabditis elegans Model. Antioxidants (Basel) 2021; 10:antiox10040519. [PMID: 33810497 PMCID: PMC8066965 DOI: 10.3390/antiox10040519] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Revised: 03/23/2021] [Accepted: 03/24/2021] [Indexed: 12/13/2022] Open
Abstract
Aging is associated with a decline in the quality of biological functions. Among the aging processes, reproductive aging is a critical process because of its intergenerational effects. However, the mechanisms underlying reproductive aging remain largely unknown. Female reproductive aging is the primary reason for limited fertility in mammals. Therefore, we attempted to investigate a modulator that can control female reproductive aging using a Caenorhabditis elegans model. In the present study, we examined the role of nicotinamide (NAM) in oocyte quality and offspring development. The levels of reactive oxygen species (ROS) and oxidative stress responses in aged oocytes, embryonic lethality, and developmental growth of the offspring were examined with maternal NAM supplementation. Supplementation with NAM improved oocyte quality, decreased embryonic lethality, and promoted germ cell apoptosis. Furthermore, NAM supplementation in aged mothers reduced ROS accumulation and improved mitochondrial function in oocytes. Consequently, the developmental growth and motility of offspring were improved. These findings suggest that NAM supplementation improves the health of the offspring produced by aged mothers through improved mitochondrial function. Taken together, our results imply that NAM supplementation in the aged mother improves oocyte quality and protects offspring by modulating mitochondrial function.
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Jin Y, Yang M, Gao C, Yue W, Liang X, Xie B, Zhu X, Fan S, Li R, Li M. Fbxo30 regulates chromosome segregation of oocyte meiosis. Cell Mol Life Sci 2019; 76:2217-2229. [PMID: 30980108 PMCID: PMC11105211 DOI: 10.1007/s00018-019-03038-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2018] [Revised: 01/14/2019] [Accepted: 02/01/2019] [Indexed: 01/18/2023]
Abstract
As the female gamete, meiotic oocytes provide not only half of the genome but also almost all stores for fertilization and early embryonic development. Because de novo mRNA transcription is absent in oocyte meiosis, protein-level regulations, especially the ubiquitin proteasome system, are more crucial. As the largest family of ubiquitin E3 ligases, Skp1-Cullin-F-box complexes recognize their substrates via F-box proteins with substrate-selected specificity. However, the variety of F-box proteins and their unknown substrates hinder our understanding of their functions. In this report, we find that Fbxo30, a new member of F-box proteins, is enriched in mouse oocytes, and its expression level declines substantially after the metaphase of the first meiosis (MI). Notably, depletion of Fbxo30 causes significant chromosome compaction accompanied by chromosome segregation failure and arrest at the MI stage, and this arrest is not caused by over-activation of spindle assembly checkpoint. Using immunoprecipitation and mass spectrometric analysis, we identify stem-loop-binding protein (SLBP) as a novel substrate of Fbxo30. SLBP overexpression caused by Fbxo30 depletion results in a remarkable overload of histone H3 on chromosomes that excessively condenses chromosomes and inhibits chromosome segregation. Our finding uncovers an unidentified pathway-controlling chromosome segregation and cell progress.
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Affiliation(s)
- Yimei Jin
- Center for Reproductive Medicine, Peking University Third Hospital, Beijing, 100191, China
- Key Laboratory of Assisted Reproduction, Ministry of Education, Beijing, 100191, China
| | - Mo Yang
- Center for Reproductive Medicine, Peking University Third Hospital, Beijing, 100191, China
- Key Laboratory of Assisted Reproduction, Ministry of Education, Beijing, 100191, China
| | - Chang Gao
- Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing, 100191, China
| | - Wei Yue
- Center for Reproductive Medicine, Peking University Third Hospital, Beijing, 100191, China
| | - Xiaoling Liang
- Center for Reproductive Medicine, Peking University Third Hospital, Beijing, 100191, China
- Department of Obstetrics and Gynecology, Peking University Shenzhen Hospital, Shenzhen, 518036, China
| | - Bingteng Xie
- Center for Reproductive Medicine, Peking University Third Hospital, Beijing, 100191, China
- Key Laboratory of Assisted Reproduction, Ministry of Education, Beijing, 100191, China
| | - Xiaohui Zhu
- Center for Reproductive Medicine, Peking University Third Hospital, Beijing, 100191, China
- Key Laboratory of Assisted Reproduction, Ministry of Education, Beijing, 100191, China
| | - Shangrong Fan
- Center for Reproductive Medicine, Peking University Third Hospital, Beijing, 100191, China
- Department of Obstetrics and Gynecology, Peking University Shenzhen Hospital, Shenzhen, 518036, China
| | - Rong Li
- Center for Reproductive Medicine, Peking University Third Hospital, Beijing, 100191, China.
- Key Laboratory of Assisted Reproduction, Ministry of Education, Beijing, 100191, China.
| | - Mo Li
- Center for Reproductive Medicine, Peking University Third Hospital, Beijing, 100191, China.
- Key Laboratory of Assisted Reproduction, Ministry of Education, Beijing, 100191, China.
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8
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Wang ZB, Hao JX, Meng TG, Guo L, Dong MZ, Fan LH, Ouyang YC, Wang G, Sun QY, Ou XH, Yao YQ. Transfer of autologous mitochondria from adipose tissue-derived stem cells rescues oocyte quality and infertility in aged mice. Aging (Albany NY) 2019; 9:2480-2488. [PMID: 29283885 PMCID: PMC5764387 DOI: 10.18632/aging.101332] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Accepted: 11/26/2017] [Indexed: 12/20/2022]
Abstract
Elder women suffer from low or loss of fertility because of decreasing oocyte quality as maternal aging. As energy resource, mitochondria play pivotal roles in oocyte development, determining oocyte quality. With advanced maternal age, increased dysfunctions emerge in oocyte mitochondria, which decrease oocyte quality and its developmental potential. Mitochondria supplement as a possible strategy for improving egg quality has been in debate due to ethnic problems. Heterogeneity is an intractable problem even transfer of germinal vesicle, spindle, pronuclei or polar body is employed. We proposed that the autologous adipose tissue-derived stem cell (ADSC) mitochondria could improve the fertility in aged mice. We found that autologous ADSC mitochondria could promote oocyte quality, embryo development and fertility in aged mice, which may provide a promising strategy for treatment of low fertility or infertility in elder women.
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Affiliation(s)
- Zhen-Bo Wang
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China.,University of Chinese Academy of Sciences, Beijing 100101, China
| | - Jian-Xiu Hao
- Department of Obstetrics and Gynecology, General Hospital of Chinese People's Liberation Army, Beijing 100853, China
| | - Tie-Gang Meng
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China.,University of Chinese Academy of Sciences, Beijing 100101, China
| | - Lei Guo
- Center for Reproductive Medicine, Guangdong Second Provincial General Hospital, Guangzhou 510317, China
| | - Ming-Zhe Dong
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China.,University of Chinese Academy of Sciences, Beijing 100101, China
| | - Li-Hua Fan
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China.,University of Chinese Academy of Sciences, Beijing 100101, China
| | - Ying-Chun Ouyang
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Guopeng Wang
- The Core Facilities at School of Life Sciences, Peking University, Beijing 100871, China
| | - Qing-Yuan Sun
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China.,University of Chinese Academy of Sciences, Beijing 100101, China
| | - Xiang-Hong Ou
- Center for Reproductive Medicine, Guangdong Second Provincial General Hospital, Guangzhou 510317, China
| | - Yuan-Qing Yao
- Department of Obstetrics and Gynecology, General Hospital of Chinese People's Liberation Army, Beijing 100853, China
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9
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Functions and dysfunctions of the mammalian centrosome in health, disorders, disease, and aging. Histochem Cell Biol 2018; 150:303-325. [PMID: 30062583 DOI: 10.1007/s00418-018-1698-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/19/2018] [Indexed: 01/17/2023]
Abstract
Since its discovery well over 100 years ago (Flemming, in Sitzungsber Akad Wissensch Wien 71:81-147, 1875; Van Beneden, in Bull Acad R Belg 42:35-97, 1876) the centrosome is increasingly being recognized as a most impactful organelle for its role not only as primary microtubule organizing center (MTOC) but also as a major communication center for signal transduction pathways and as a center for proteolytic activities. Its significance for cell cycle regulation has been well studied and we now also know that centrosome dysfunctions are implicated in numerous diseases and disorders including cancer, Alstrom syndrome, Bardet-Biedl syndrome, Huntington's disease, reproductive disorders, and several other diseases and disorders. The present review is meant to build on information presented in the previous review (Schatten, in Histochem Cell Biol 129:667-686, 2008) and to highlight functions of the mammalian centrosome in health, and dysfunctions in disorders, disease, and aging with six sections focused on (1) centrosome structure and functions, and new insights into the role of centrosomes in cell cycle progression; (2) the role of centrosomes in tumor initiation and progression; (3) primary cilia, centrosome-primary cilia interactions, and consequences for cell cycle functions in health and disease; (4) transitions from centrosome to non-centrosome functions during cellular polarization; (5) other centrosome dysfunctions associated with the pathogenesis of human disease; and (6) centrosome functions in oocyte germ cells and dysfunctions in reproductive disorders and reproductive aging.
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Schatten H, Sun QY. Centrosome and microtubule functions and dysfunctions in meiosis: implications for age-related infertility and developmental disorders. Reprod Fertil Dev 2017; 27:934-43. [PMID: 25903261 DOI: 10.1071/rd14493] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Accepted: 03/18/2015] [Indexed: 12/13/2022] Open
Abstract
The effects of oocyte aging on meiotic spindle dynamics have been well recognised, but the mechanisms underlying the effects are not well understood. In this paper we review the role of centrosomes and the microtubule cytoskeleton in meiotic spindle formation and maintenance, and the impact of oocyte aging on spindle integrity resulting in centrosome and microtubule dysfunctions that are associated with aneuploidy. Loss of spindle integrity includes dispersion of proteins from the centrosome core structure and loss of attachment of microtubules to centrosomes and kinetochores, which will result in abnormal chromosome separation. The inability of centrosomal proteins to accurately associate with the centrosome structure may be the result of destabilisation of the core structure itself or of microtubule destabilisation at the centrosome-facing microtubule areas that are acetylated in fresh oocytes but may not be acetylated in aging oocytes. Microtubule destabilisation prevents accurate motor-driven transport of centrosomal proteins along microtubules to form and maintain a functional centrosome. Other factors to form and maintain the MII spindle include signal transductions that affect microtubule dynamics and stability. Understanding the mechanisms underlying centrosome and microtubule dysfunctions during oocyte aging will allow diagnosis and analysis of oocyte quality and abnormalities as important aspects for targeted treatment of aging oocytes to extend or restore viability and developmental capacity. New therapeutic approaches will allow improvements in reproductive success rates in IVF clinics, as well as improvements in reproductive success rates in farm animals. This review is focused on: (1) centrosome and microtubule dynamics in fresh and aging oocytes; (2) regulation of centrosome and/or microtubule dynamics and function; and (3) possible treatments to extend the oocyte's reproductive capacity and viability span.
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Affiliation(s)
- Heide Schatten
- Department of Veterinary Pathobiology, University of Missouri, 1600 E Rollins Street, Columbia, MO 65211, USA
| | - Qing-Yuan Sun
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100080, China
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11
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Predictive value of spindle retardance in embryo implantation rate. J Assist Reprod Genet 2017; 34:617-625. [PMID: 28281144 DOI: 10.1007/s10815-017-0897-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Accepted: 02/27/2017] [Indexed: 12/16/2022] Open
Abstract
PURPOSE We evaluated the relationship between meiotic spindle characteristics and in vitro fertilization cycle outcome. METHODS Five hundred sixty-nine oocytes from 86 in vitro fertilization cycles were analyzed for fertilization and subsequent implantation rates. Oocytes were assessed for maturation status. The oocytes and embryos were cultured in sequential and nonsequential media (G Series, Vitrolife, Sweden) and incubated in 6% CO2, 5% O2 at 37 °C. Two hours following oocyte decumulation (38-39 h post-hCG/GnRH administration) and prior to microinjection, the structure of the meiotic spindle was assessed using the Oosight Imaging System (CRI, UK). RESULTS Four hundred fifty-six oocytes (80.5%) had a visible meiotic spindle, 82 (14.7%) had no meiotic spindle, and 31 (5.5%) were in telophase I. Oocytes exhibiting a meiotic spindle had a significantly higher fertilization rate and a lower rate of abnormal fertilization. Implantation data were obtained for 195 of the embryos transferred. The implantation rate for embryos derived from oocytes with a meiotic spindle was 32.9%, while in embryos originating from oocytes without a meiotic spindle and oocytes in telophase, this value dropped significantly (8.8 and 0%, respectively). To determine the correlation between retardance values and implantation rate for each oocyte, we established four groups, finding a range of retardance values with significantly higher implantation rates (27.5, 21, 29.3, and 53.8%, respectively). CONCLUSION Meiotic spindle imaging may be a valuable tool for prediction of oocyte quality, and retardance values of meiotic spindles, together with classical morphological classification, can be useful to select embryos with a higher implantation potential.
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Schatten H, Sun QY. Cytoskeletal Functions, Defects, and Dysfunctions Affecting Human Fertilization and Embryo Development. Hum Reprod 2016. [DOI: 10.1002/9781118849613.ch10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Affiliation(s)
- Heide Schatten
- Department of Veterinary Pathobiology; University of Missouri; Columbia MO USA
| | - Qing-Yuan Sun
- State Key Laboratory of Reproductive Biology, Institute of Zoology; Chinese Academy of Sciences; Beijing China
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Wang ZB, Ma XS, Hu MW, Jiang ZZ, Meng TG, Dong MZ, Fan LH, Ouyang YC, Snapper SB, Schatten H, Sun QY. Oocyte-specific deletion of N-WASP does not affect oocyte polarity, but causes failure of meiosis II completion. Mol Hum Reprod 2016; 22:613-21. [PMID: 27401749 DOI: 10.1093/molehr/gaw046] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2015] [Accepted: 06/02/2016] [Indexed: 01/04/2023] Open
Abstract
STUDY QUESTION There is an unexplored physiological role of N-WASP (neural Wiskott-Aldrich syndrome protein) in oocyte maturation that prevents completion of second meiosis. SUMMARY ANSWER In mice, N-WASP deletion did not affect oocyte polarity and asymmetric meiotic division in first meiosis, but did impair midbody formation and second meiosis completion. WHAT IS KNOWN ALREADY N-WASP regulates actin dynamics and participates in various cell activities through the RHO-GTPase-Arp2/3 (actin-related protein 2/3 complex) pathway, and specifically the Cdc42 (cell division cycle 42)-N-WASP-Arp2/3 pathway. Differences in the functions of Cdc42 have been obtained from in vitro compared to in vivo studies. STUDY DESIGN, SAMPLES/MATERIALS, METHODS By conditional knockout of N-WASP in mouse oocytes, we analyzed its in vivo functions by employing a variety of different methods including oocyte culture, immunofluorescent staining and live oocyte imaging. Each experiment was repeated at least three times, and data were analyzed by paired-samples t-test. MAIN RESULTS AND THE ROLE OF CHANCE Oocyte-specific deletion of N-WASP did not affect the process of oocyte maturation including spindle formation, spindle migration, polarity establishment and maintenance, and homologous chromosome or sister chromatid segregation, but caused failure of cytokinesis completion during second meiosis (P < 0.001 compared to control). Further analysis showed that a defective midbody may be responsible for the failure of cytokinesis completion. LIMITATIONS, REASONS FOR CAUTION The present study did not include a detailed analysis of the mechanisms underlying the results, which will require more extensive further investigations. WIDER IMPLICATIONS OF THE FINDINGS N-WASP may play an important role in mediating and co-ordinating the activity of the spindle (midbody) and actin (contractile ring constriction) when cell division occurs. The findings are important for understanding the regulation of oocyte meiosis completion and failures in this process that affect oocyte quality. LARGE SCALE DATA None. STUDY FUNDING AND COMPETING INTERESTS This work was supported by the National Basic Research Program of China (No. 2012CB944404) and the National Natural Science Foundation of China (Nos 30930065, 31371451, 31272260 and 31530049). There are no potential conflicts of interests.
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Affiliation(s)
- Zhen-Bo Wang
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, P.R. China University of Chinese Academy of Sciences, Beijing 100101, P.R. China
| | - Xue-Shan Ma
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, P.R. China
| | - Meng-Wen Hu
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, P.R. China
| | - Zong-Zhe Jiang
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, P.R. China
| | - Tie-Gang Meng
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, P.R. China University of Chinese Academy of Sciences, Beijing 100101, P.R. China
| | - Ming-Zhe Dong
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, P.R. China
| | - Li-Hua Fan
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, P.R. China University of Chinese Academy of Sciences, Beijing 100101, P.R. China
| | - Ying-Chun Ouyang
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, P.R. China
| | - Scott B Snapper
- Gastrointestinal Unit, Massachusetts General Hospital, Boston, MA 02114, USA Center for the Study of Inflammatory Bowel Disease, Massachusetts General Hospital, Boston, MA 02114, USA Department of Medicine, Harvard Medical School, Boston, MA 02115, USA
| | - Heide Schatten
- Department of Veterinary Pathobiology, University of Missouri, Columbia, MO 65211, USA
| | - Qing-Yuan Sun
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, P.R. China University of Chinese Academy of Sciences, Beijing 100101, P.R. China
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Hu MW, Wang ZB, Teng Y, Jiang ZZ, Ma XS, Hou N, Cheng X, Schatten H, Xu X, Yang X, Sun QY. Loss of protein phosphatase 6 in oocytes causes failure of meiosis II exit and impaired female fertility. J Cell Sci 2015; 128:3769-80. [PMID: 26349807 DOI: 10.1242/jcs.173179] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Accepted: 09/03/2015] [Indexed: 01/29/2023] Open
Abstract
Dynamic protein phosphorylation and dephosphorylation, mediated by a conserved cohort of protein kinases and phosphatases, regulate cell cycle progression. Among the well-known PP2A-like protein phosphatases, protein phosphatase 6 (PP6) has been analyzed in mammalian mitosis, and Aurora A has recently been identified as its key substrate. However, the functions of PP6 in meiosis are still entirely unknown. To identify the physiological role of PP6 in female gametogenesis, Ppp6c(F/F) mice were first generated and crossed with Zp3-Cre mice to selectively disrupt Ppp6c expression in oocytes. Here, we report for the first time that PP6c is dispensable for oocyte meiotic maturation but essential for exit from meiosis II (MII) after fertilization. Depletion of PP6c caused an abnormal MII spindle and disrupted MII cytokinesis, resulting in zygotes with high risk of aneuploidy and defective early embryonic development, and thus severe subfertility. We also reveal that PP6 inactivation interferes with MII spindle formation and MII exit owing to increased Aurora A activity, and that Aurora A inhibition with MLN8237 can rescue the PP6c depletion phenotype. In conclusion, our findings uncover a hitherto unknown role for PP6 as an indispensable regulator of oocyte meiosis and female fertility.
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Affiliation(s)
- Meng-Wen Hu
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China University of Chinese Academy of Sciences, Beijing 100101, China
| | - Zhen-Bo Wang
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Yan Teng
- State Key Laboratory of Proteomics, Genetic Laboratory of Development and Disease, Institute of Biotechnology, 20 Dongdajie, Beijing 100071, China
| | - Zong-Zhe Jiang
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China University of Chinese Academy of Sciences, Beijing 100101, China
| | - Xue-Shan Ma
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Ning Hou
- State Key Laboratory of Proteomics, Genetic Laboratory of Development and Disease, Institute of Biotechnology, 20 Dongdajie, Beijing 100071, China
| | - Xuan Cheng
- State Key Laboratory of Proteomics, Genetic Laboratory of Development and Disease, Institute of Biotechnology, 20 Dongdajie, Beijing 100071, China
| | - Heide Schatten
- Department of Veterinary Pathobiology, University of Missouri, Columbia, MO 65211, USA
| | - Xingzhi Xu
- Beijing Key Laboratory of DNA Damage Response and College of Life Sciences, Capital Normal University, Beijing 100048, China
| | - Xiao Yang
- State Key Laboratory of Proteomics, Genetic Laboratory of Development and Disease, Institute of Biotechnology, 20 Dongdajie, Beijing 100071, China
| | - Qing-Yuan Sun
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
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Zhang D, Zhang X, Zeng M, Yuan J, Liu M, Yin Y, Wu X, Keefe DL, Liu L. Increased DNA damage and repair deficiency in granulosa cells are associated with ovarian aging in rhesus monkey. J Assist Reprod Genet 2015; 32:1069-78. [PMID: 25957622 DOI: 10.1007/s10815-015-0483-5] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Accepted: 04/13/2015] [Indexed: 12/20/2022] Open
Abstract
PURPOSE Ovarian aging is closely tied to the decline in ovarian follicular reserve and oocyte quality. During the prolonged reproductive lifespan of the female, granulosa cells connected with oocytes play critical roles in maintaining follicle reservoir, oocyte growth and follicular development. We tested whether double-strand breaks (DSBs) and repair in granulosa cells within the follicular reservoir are associated with ovarian aging. METHODS Ovaries were sectioned and processed for epi-fluorescence microscopy, confocal microscopy, and immunohistochemistry. DNA damage was revealed by immunstaining of γH2AX foci and telomere damage by γH2AX foci co-localized with telomere associated protein TRF2. DNA repair was indicated by BRCA1 immunofluorescence. RESULTS DSBs in granulosa cells increase and DSB repair ability, characterized by BRCA1 foci, decreases with advancing age. γH2AX foci increase in primordial, primary and secondary follicles with advancing age. Likewise, telomere damage increases with advancing age. In contrast, BRCA1 foci in granulosa cells of primordial, primary and secondary follicles decrease with monkey age. BRCA1 positive foci in the oocyte nuclei also decline with maternal age. CONCLUSIONS Increased DSBs and reduced DNA repair in granulosa cells may contribute to ovarian aging. Discovery of therapeutics that targets these pathways might help maintain follicle reserve and postpone ovarian dysfunction with age.
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Affiliation(s)
- Dongdong Zhang
- State Key Laboratory of Medicinal Chemical Biology; Collaborative Innovation Center for Biotherapy, College of Life Sciences, Nankai University, Tianjin, 300071, China
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Wei Y, Zhang T, Wang YP, Schatten H, Sun QY. Polar bodies in assisted reproductive technology: current progress and future perspectives. Biol Reprod 2014; 92:19. [PMID: 25472922 DOI: 10.1095/biolreprod.114.125575] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
During meiotic cell-cycle progression, unequal divisions take place, resulting in a large oocyte and two diminutive polar bodies. The first polar body contains a subset of bivalent chromosomes, whereas the second polar body contains a haploid set of chromatids. One unique feature of the female gamete is that the polar bodies can provide beneficial information about the genetic background of the oocyte without potentially destroying it. Therefore, polar body biopsies have been applied in preimplantation genetic diagnosis to detect chromosomal or genetic abnormalities that might be inherited by the offspring. Besides the traditional use in preimplantation diagnosis, recent findings suggest additional important roles for polar bodies in assisted reproductive technology. In this paper, we review the new roles of polar bodies in assisted reproductive technology, mainly focusing on single-cell sequencing of the polar body genome to deduce the genomic information of its sibling oocyte and on polar body transfer to prevent the transmission of mtDNA-associated diseases. We also discuss additional potential roles for polar bodies and related key questions in human reproductive health. We believe that further exploration of new roles for polar bodies will contribute to a better understanding of reproductive health and that polar body manipulation and diagnosis will allow production of a greater number of healthy babies.
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Affiliation(s)
- Yanchang Wei
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Teng Zhang
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Ya-Peng Wang
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Heide Schatten
- Department of Veterinary Pathobiology, University of Missouri, Columbia, Missouri
| | - Qing-Yuan Sun
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
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17
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Schatten H, Sun QY, Prather R. The impact of mitochondrial function/dysfunction on IVF and new treatment possibilities for infertility. Reprod Biol Endocrinol 2014; 12:111. [PMID: 25421171 PMCID: PMC4297407 DOI: 10.1186/1477-7827-12-111] [Citation(s) in RCA: 103] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Accepted: 09/04/2014] [Indexed: 11/12/2022] Open
Abstract
Mitochondria play vital roles in oocyte functions and they are critical indicators of oocyte quality which is important for fertilization and development into viable offspring. Quality-compromised oocytes are correlated with infertility, developmental disorders, reduced blastocyst cell number and embryo loss in which mitochondrial dysfunctions play a significant role. Increasingly, women affected by metabolic disorders such as diabetes or obesity and oocyte aging are seeking treatment in IVF clinics to overcome the effects of adverse metabolic conditions on mitochondrial functions and new treatments have become available to restore oocyte quality. The past decade has seen enormous advances in potential therapies to restore oocyte quality and includes dietary components and transfer of mitochondria from cells with mitochondrial integrity into mitochondria-impaired oocytes. New technologies have opened up new possibilities for therapeutic advances which will increase the success rates for IVF of oocytes from women with compromised oocyte quality.
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Affiliation(s)
- Heide Schatten
- Department of Veterinary Pathobiology, University of Missouri, Columbia, MO USA
| | - Qing-Yuan Sun
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, 100080 Beijing, China
| | - Randall Prather
- National Swine Resource and Research Center, University of Missouri, 65211 Columbia, USA
- Division of Animal Science, University of Missouri, 65211 Columbia, USA
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18
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Qi ST, Liang LF, Xian YX, Liu JQ, Wang W. Arrested human embryos are more likely to have abnormal chromosomes than developing embryos from women of advanced maternal age. J Ovarian Res 2014; 7:65. [PMID: 24955133 PMCID: PMC4065243 DOI: 10.1186/1757-2215-7-65] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2014] [Accepted: 06/10/2014] [Indexed: 11/10/2022] Open
Abstract
Background Aneuploidy is one of the major factors that result in low efficiency in human infertility treatment by in vitro fertilization (IVF). The development of DNA microarray technology allows for aneuploidy screening by analyzing all 23 pairs of chromosomes in human embryos. All chromosome screening for aneuploidy is more accurate than partial chromosome screening, as errors can occur in any chromosome. Currently, chromosome screening for aneuploidy is performed in developing embryos, mainly blastocysts. It has not been performed in arrested embryos and/or compared between developing embryos and arrested embryos from the same IVF cycle. Methods The present study was designed to examine all chromosomes in blastocysts and arrested embryos from the same cycle in patients of advanced maternal ages. Embryos were produced by routine IVF procedures. A total of 90 embryos (45 blastocysts and 45 arrested embryos) from 17 patients were biopsied and analyzed by the Agilent DNA array platform. Results It was found that 50% of the embryos developed to blastocyst stage; however, only 15.6% of the embryos (both blastocyst and arrested) were euploid, and most (84.4%) of the embryos had chromosomal abnormalities. Further analysis indicated that 28.9% of blastocysts were euploid and 71.1% were aneuploid. By contrast, only one (2.2%) arrested embryo was euploid while others (97.8%) were aneuploid. The prevalence of multiple chromosomal abnormalities in the aneuploid embryos was also higher in the arrested embryos than in the blastocysts. Conclusions These results indicate that high proportions of human embryos from patients of advanced maternal age are aneuploid, and the arrested embryos are more likely to have abnormal chromosomes than developing embryos.
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Affiliation(s)
- Shu-Tao Qi
- Key Laboratory of Major Obstetrics Diseases of Guangdong Province, The Third Hospital Affiliated to Guangzhou Medical University, Guangdong, China
| | - Li-Feng Liang
- Key Laboratory of Major Obstetrics Diseases of Guangdong Province, The Third Hospital Affiliated to Guangzhou Medical University, Guangdong, China
| | - Ye-Xing Xian
- Key Laboratory of Major Obstetrics Diseases of Guangdong Province, The Third Hospital Affiliated to Guangzhou Medical University, Guangdong, China
| | - Jian-Qiao Liu
- Key Laboratory of Major Obstetrics Diseases of Guangdong Province, The Third Hospital Affiliated to Guangzhou Medical University, Guangdong, China ; Reproductive Medicine Center, the Third Hospital Affiliated to Guangzhou Medical University, Guangdong, China
| | - Weihua Wang
- Key Laboratory of Major Obstetrics Diseases of Guangdong Province, The Third Hospital Affiliated to Guangzhou Medical University, Guangdong, China ; Houston Fertility Institute/Houston Fertility Laboratory, Houston, Texas, USA
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19
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Yun Y, Holt JE, Lane SIR, McLaughlin EA, Merriman JA, Jones KT. Reduced ability to recover from spindle disruption and loss of kinetochore spindle assembly checkpoint proteins in oocytes from aged mice. Cell Cycle 2014; 13:1938-47. [PMID: 24758999 DOI: 10.4161/cc.28897] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Currently, maternal aging in women, based on mouse models, is thought to raise oocyte aneuploidy rates, because chromosome cohesion deteriorates during prophase arrest, and Sgo2, a protector of centromeric cohesion, is lost. Here we show that the most common mouse strain, C57Bl6/J, is resistant to maternal aging, showing little increase in aneuploidy or Sgo2 loss. Instead it demonstrates significant kinetochore-associated loss in the spindle assembly checkpoint protein Mad2 and phosphorylated Aurora C, which is involved in microtubule-kinetochore error correction. Their loss affects the fidelity of bivalent segregation but only when spindle organization is impaired during oocyte maturation. These findings have an impact clinically regarding the handling of human oocytes ex vivo during assisted reproductive techniques and suggest there is a genetic basis to aneuploidy susceptibility.
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Affiliation(s)
- Yan Yun
- School of Biomedical Sciences & Pharmacy; University of Newcastle; Callaghan, NSW, Australia
| | - Janet E Holt
- School of Biomedical Sciences & Pharmacy; University of Newcastle; Callaghan, NSW, Australia
| | - Simon I R Lane
- School of Biomedical Sciences & Pharmacy; University of Newcastle; Callaghan, NSW, Australia; Centre for Biological Sciences; Faculty of Natural and Environmental Sciences; University of Southampton; Southampton, UK
| | - Eileen A McLaughlin
- School of Environmental and Life Sciences; University of Newcastle; Callaghan, NSW, Australia
| | - Julie A Merriman
- School of Biomedical Sciences & Pharmacy; University of Newcastle; Callaghan, NSW, Australia; Centre for Biological Sciences; Faculty of Natural and Environmental Sciences; University of Southampton; Southampton, UK
| | - Keith T Jones
- School of Biomedical Sciences & Pharmacy; University of Newcastle; Callaghan, NSW, Australia; Centre for Biological Sciences; Faculty of Natural and Environmental Sciences; University of Southampton; Southampton, UK
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He W, Sun X, Liu L, Li M, Jin H, Wang WH. The prevalence of chromosomal deletions relating to developmental delay and/or intellectual disability in human euploid blastocysts. PLoS One 2014; 9:e85207. [PMID: 24409323 PMCID: PMC3883698 DOI: 10.1371/journal.pone.0085207] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2013] [Accepted: 11/21/2013] [Indexed: 11/22/2022] Open
Abstract
Chromosomal anomalies in human embryos produced by in vitro fertilization are very common, which include numerical (aneuploidy) and structural (deletion, duplication or others) anomalies. Our previous study indicated that chromosomal deletion(s) is the most common structural anomaly accounting for approximately 8% of euploid blastocysts. It is still unknown if these deletions in human euploid blastocysts have clinical significance. In this study, we analyzed 15 previously diagnosed euploid blastocysts that had chromosomal deletion(s) using Agilent oligonucleotide DNA microarray platform and localized the gene location in each deletion. Then, we used OMIM gene map and phenotype database to investigate if these deletions are related with some important genes that cause genetic diseases, especially developmental delay or intellectual disability. As results, we found that the detectable chromosomal deletion size with Agilent microarray is above 2.38 Mb, while the deletions observed in human blastocysts are between 11.6 to 103 Mb. With OMIM gene map and phenotype database information, we found that deletions can result in loss of 81-464 genes. Out of these genes, 34–149 genes are related with known genetic problems. Furthermore, we found that 5 out of 15 samples lost genes in the deleted region, which were related to developmental delay and/or intellectual disability. In conclusion, our data indicates that all human euploid blastocysts with chromosomal deletion(s) are abnormal and transfer of these embryos may cause birth defects and/or developmental and intellectual disabilities. Therefore, the embryos with chromosomal deletion revealed by DNA microarray should not be transferred to the patients, or further gene map and/or phenotype seeking is necessary before making a final decision.
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Affiliation(s)
- Wenyin He
- Key Laboratory of Major Obstetrics Diseases of Guangdong Province, The Third Affiliated Hospital of Guangzhou Medical University, Guangdong, China
| | - Xiaofang Sun
- Key Laboratory of Major Obstetrics Diseases of Guangdong Province, The Third Affiliated Hospital of Guangzhou Medical University, Guangdong, China
| | - Lian Liu
- Pacgenomics Inc., Village Medical Center, Thousand Oaks, California, United States of America
| | - Man Li
- Pacgenomics Inc., Village Medical Center, Thousand Oaks, California, United States of America
| | - Hua Jin
- Pacgenomics Inc., Village Medical Center, Thousand Oaks, California, United States of America
| | - Wei-Hua Wang
- New Houston Health, Houston, Texas, United States of America
- Vivere Health, Franklin, Tennessee, United States of America
- * E-mail:
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Qiao J, Wang ZB, Feng HL, Miao YL, Wang Q, Yu Y, Wei YC, Yan J, Wang WH, Shen W, Sun SC, Schatten H, Sun QY. The root of reduced fertility in aged women and possible therapentic options: current status and future perspects. Mol Aspects Med 2013; 38:54-85. [PMID: 23796757 DOI: 10.1016/j.mam.2013.06.001] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2013] [Accepted: 06/06/2013] [Indexed: 12/21/2022]
Abstract
It is well known that maternal ageing not only causes increased spontaneous abortion and reduced fertility, but it is also a high genetic disease risk. Although assisted reproductive technologies (ARTs) have been widely used to treat infertility, the overall success is still low. The main reasons for age-related changes include reduced follicle number, compromised oocyte quality especially aneuploidy, altered reproductive endocrinology, and increased reproductive tract defect. Various approaches for improving or treating infertility in aged women including controlled ovarian hyperstimulation with intrauterine insemination (IUI), IVF/ICSI-ET, ovarian reserve testing, preimplantation genetic diagnosis and screening (PGD/PGS), oocyte selection and donation, oocyte and ovary tissue cryopreservation before ageing, miscarriage prevention, and caloric restriction are summarized in this review. Future potential reproductive techniques for infertile older women including oocyte and zygote micromanipulations, derivation of oocytes from germ stem cells, ES cells, and iPS cells, as well as through bone marrow transplantation are discussed.
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Affiliation(s)
- Jie Qiao
- Center of Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing 100191, People's Republic of China
| | - Zhen-Bo Wang
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, People's Republic of China
| | - Huai-Liang Feng
- Department of Laboratory Medicine, and Obstetrics and Gynecology, New York Hospital Queens, Weill Medical College of Cornell University, New York, NY, USA
| | - Yi-Liang Miao
- Reproductive Medicine Group, Laboratory of Reproductive and Developmental Toxicology, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC 27709, USA
| | - Qiang Wang
- Department of Obstetrics and Gynecology, Washington University School of Medicine, 660 South Euclid Ave., St. Louis, MO 63110, USA
| | - Yang Yu
- Center of Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing 100191, People's Republic of China
| | - Yan-Chang Wei
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, People's Republic of China
| | - Jie Yan
- Center of Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing 100191, People's Republic of China
| | - Wei-Hua Wang
- Houston Fertility Institute, Tomball Regional Hospital, Tomball, TX 77375, USA
| | - Wei Shen
- Laboratory of Germ Cell Biology, Department of Animal Science, Qingdao Agricultural University, Qingdao 266109, People's Republic of China
| | - Shao-Chen Sun
- Department of Animal Science, Nanjing Agricultural University, Nanjing 210095, People's Republic of China
| | - Heide Schatten
- Department of Veterinary Pathobiology, University of Missouri, Columbia, MO 65211, USA
| | - Qing-Yuan Sun
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, People's Republic of China.
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Liu J, Wang W, Sun X, Liu L, Jin H, Li M, Witz C, Williams D, Griffith J, Skorupski J, Haddad G, Gill J. DNA Microarray Reveals That High Proportions of Human Blastocysts from Women of Advanced Maternal Age Are Aneuploid and Mosaic1. Biol Reprod 2012; 87:148. [DOI: 10.1095/biolreprod.112.103192] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
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Liang X, Ma J, Schatten H, Sun Q. Epigenetic changes associated with oocyte aging. SCIENCE CHINA-LIFE SCIENCES 2012; 55:670-6. [DOI: 10.1007/s11427-012-4354-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2012] [Accepted: 06/19/2012] [Indexed: 11/29/2022]
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Sebestova J, Danylevska A, Novakova L, Kubelka M, Anger M. Lack of response to unaligned chromosomes in mammalian female gametes. Cell Cycle 2012; 11:3011-8. [PMID: 22871737 PMCID: PMC3442912 DOI: 10.4161/cc.21398] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Chromosome segregation errors are highly frequent in mammalian female meiosis, and their incidence gradually increases with maternal age. The fate of aneuploid eggs is obviously dependent on the stringency of mechanisms for detecting unattached or repairing incorrectly attached kinetochores. In case of their failure, the newly formed embryo will inherit the impaired set of chromosomes, which will have severe consequences for its further development. Whether spindle assembly checkpoint (SAC) in oocytes is capable of arresting cell cycle progression in response to unaligned kinetochores was discussed for a long time. It is known that abolishing SAC increases frequency of chromosome segregation errors and causes precocious entry into anaphase; SAC, therefore, seems to be essential for normal chromosome segregation in meiosis I. However, it was also reported that for anaphase-promoting complex (APC) activation, which is a prerequisite for entering anaphase; alignment of only a critical mass of kinetochores on equatorial plane is sufficient. This indicates that the function of SAC and of cooperating chromosome attachment correction mechanisms in oocytes is different from somatic cells. To analyze this phenomenon, we used live cell confocal microscopy to monitor chromosome movements, spindle formation, APC activation and polar body extrusion (PBE) simultaneously in individual oocytes at various time points during first meiotic division. Our results, using oocytes from aged animals and interspecific crosses, demonstrate that multiple unaligned kinetochores and severe congression defects are tolerated at the metaphase to anaphase transition, although such cells retain sensitivity to nocodazole. This indicates that checkpoint mechanisms, operating in oocytes at this point, are essential for accurate timing of APC activation in meiosis I, but they are insufficient in detection or correction of unaligned chromosomes, preparing thus conditions for propagation of the aneuploidy to the embryo.
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