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Briley SM, Ahmed AA, Steenwinkel TE, Jiang P, Hartig SM, Schindler K, Pangas SA. Global SUMOylation in mouse oocytes maintains oocyte identity and regulates chromatin remodeling and transcriptional silencing at the end of folliculogenesis. Development 2023; 150:dev201535. [PMID: 37676777 PMCID: PMC10499029 DOI: 10.1242/dev.201535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Accepted: 07/31/2023] [Indexed: 09/09/2023]
Abstract
Meiotically competent oocytes in mammals undergo cyclic development during folliculogenesis. Oocytes within ovarian follicles are transcriptionally active, producing and storing transcripts required for oocyte growth, somatic cell communication and early embryogenesis. Transcription ceases as oocytes transition from growth to maturation and does not resume until zygotic genome activation. Although SUMOylation, a post-translational modification, plays multifaceted roles in transcriptional regulation, its involvement during oocyte development remains poorly understood. In this study, we generated an oocyte-specific knockout of Ube2i, encoding the SUMO E2 enzyme UBE2I, using Zp3-cre+ to determine how loss of oocyte SUMOylation during folliculogenesis affects oocyte development. Ube2i Zp3-cre+ female knockout mice were sterile, with oocyte defects in meiotic competence, spindle architecture and chromosome alignment, and a premature arrest in metaphase I. Additionally, fully grown Ube2i Zp3-cre+ oocytes exhibited sustained transcriptional activity but downregulated maternal effect genes and prematurely activated genes and retrotransposons typically associated with zygotic genome activation. These findings demonstrate that UBE2I is required for the acquisition of key hallmarks of oocyte development during folliculogenesis, and highlight UBE2I as a previously unreported orchestrator of transcriptional regulation in mouse oocytes.
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Affiliation(s)
- Shawn M. Briley
- Graduate Program in Biochemistry and Molecular Biology, Baylor College of Medicine, Houston, TX 77030, USA
- Department of Pathology & Immunology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Avery A. Ahmed
- Department of Pathology & Immunology, Baylor College of Medicine, Houston, TX 77030, USA
- Graduate Program in Development, Disease Models & Therapeutics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Tessa E. Steenwinkel
- Department of Pathology & Immunology, Baylor College of Medicine, Houston, TX 77030, USA
- Graduate Program in Development, Disease Models & Therapeutics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Peixin Jiang
- Department of Pathology & Immunology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Sean M. Hartig
- Division of Diabetes, Endocrinology, & Metabolism, Baylor College of Medicine, Houston, TX 77030, USA
- Department of Medicine, Baylor College of Medicine, Houston, TX 77030, USA
- Department of Molecular & Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Karen Schindler
- Department of Genetics, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA
| | - Stephanie A. Pangas
- Graduate Program in Biochemistry and Molecular Biology, Baylor College of Medicine, Houston, TX 77030, USA
- Department of Pathology & Immunology, Baylor College of Medicine, Houston, TX 77030, USA
- Graduate Program in Development, Disease Models & Therapeutics, Baylor College of Medicine, Houston, TX 77030, USA
- Department of Molecular & Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
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Min X, Zhu Y, Hu Y, Yang M, Yu H, Xiong Y, Fu W, Li J, Matsuda F, Xiong X. Analysis of PPP1R11 expression in granulosa cells during developmental follicles of yak and its effects on cell function. Reprod Domest Anim 2023; 58:129-140. [PMID: 36178063 DOI: 10.1111/rda.14272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2022] [Revised: 09/22/2022] [Accepted: 09/24/2022] [Indexed: 01/07/2023]
Abstract
The aims of this study were to analyse the protein phosphatase 1 regulatory subunit 11 (PPP1R11) expression and cellular localization in yak follicles and investigate its effects on cell proliferation, apoptosis and oestrogen secretion in granulosa cells (GCs). Ten healthy and non-pregnant female yaks (4-year-old) were used as experimental animals. The mRNA relative expression level of PPP1R11 in GCs from small (<3.0 mm), medium (3.0-5.9 mm) and large (6.0-9.0 mm) follicles was detected by RT-qPCR, and the cellular localization of PPP1R11 protein was detected by immunohistochemistry staining (IHC). After isolation, culture and identification of yak GCs in vitro, si-PPP1R11 and si-NC (negative control) were transfected into GCs. RT-qPCR and immunofluorescence staining were used to evaluate the interference efficiency, and ELISA was performed to detect oestrogen concentration. Then, EdU staining and TUNEL staining were conducted to analyse cell proliferation and apoptosis. In addition, the oestrogen synthesis, proliferation- and apoptosis-related genes were detected by RT-qPCR after knockdown PPP1R11. The results showed that PPP1R11 is mainly located in ovarian GCs, and the expression levels of PPP1R11 in GCs from large follicles were significantly higher than that from medium and small follicles. Transfection of si-PPP1R11 into GCs could significantly inhibit the expression of PPP1R11. Interestingly, the oestrogen secretion ability and the expression level of oestrogen pathway-related genes (STAR, CYP11A1, CYP19A1 and HSD17B1) were also significantly downregulated. Moreover, the proportion of positive cells was decreased, and cellular proliferation-related genes (PCNA, CCNB1 and CDC25A) were significantly downregulated after knockdown PPP1R11. However, the proportion of apoptotic cells was increased, and apoptosis-related genes (BAX, CASP3 and P53) were significantly upregulated. Taken together, this study was the first revealed the expression and cellular localization of PPP1R11 in yak follicles. Interference PPP1R11 could reduce oestrogen secretion, inhibit proliferation and promote apoptosis in GCs, which provided a basis for further studies on the regulatory mechanism of PPP1R11 in follicle development.
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Affiliation(s)
- Xingyu Min
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Exploitation of Ministry of Education, Southwest Minzu University, Chengdu, China
| | - Yanjin Zhu
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Exploitation of Ministry of Education, Southwest Minzu University, Chengdu, China
| | - Yulei Hu
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Exploitation of Ministry of Education, Southwest Minzu University, Chengdu, China
| | - Manzhen Yang
- Key Laboratory for Animal Science of National Ethnic Affairs Commission, Southwest Minzu University, Chengdu, China
| | - Hailing Yu
- Key Laboratory for Animal Science of National Ethnic Affairs Commission, Southwest Minzu University, Chengdu, China
| | - Yan Xiong
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Exploitation of Ministry of Education, Southwest Minzu University, Chengdu, China.,Key Laboratory for Animal Science of National Ethnic Affairs Commission, Southwest Minzu University, Chengdu, China
| | - Wei Fu
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Exploitation of Ministry of Education, Southwest Minzu University, Chengdu, China
| | - Jian Li
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Exploitation of Ministry of Education, Southwest Minzu University, Chengdu, China.,Key Laboratory for Animal Science of National Ethnic Affairs Commission, Southwest Minzu University, Chengdu, China
| | - Fuko Matsuda
- Laboratory of Theriogenology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Xianrong Xiong
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Exploitation of Ministry of Education, Southwest Minzu University, Chengdu, China
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3
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Wang Y, Feng T, Zhu M, Shi X, Wang Z, Liu S, Zhang X, Zhang J, Zhao S, Zhang J, Ling X, Liu M. PABPN1L assemble into "ring-like" aggregates in the cytoplasm of MII oocytes and is associated with female infertility†. Biol Reprod 2021; 106:83-94. [PMID: 34726234 DOI: 10.1093/biolre/ioab203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 09/20/2021] [Accepted: 10/27/2021] [Indexed: 11/14/2022] Open
Abstract
Infertility affects 10% - 15% of families worldwide. However, the pathogenesis of female infertility caused by abnormal early embryonic development is not clear. A resent study showed that PABPN1L recruited BTG4 to mRNA 3'-poly(A) tails and was essential for maternal mRNA degradation. Here, we generated an PABPN1L-antibody and found "ring-like" PABPN1L aggregates in the cytoplasm of MII oocytes. PABPN1L-EGFP proteins spontaneously formed"ring-like" aggregates in vitro. This phenomenon is similar with CCR4-NOT catalytic subunit, CNOT7, when it starts deadenylation process in vitro. We constructed two mouse model (Pabpn1l -/- and Pabpn1l tm1a/tm1a) simulating the intron1-exon2 abnormality of human PABPN1L and found that the female was sterile and the male was fertile. Using RNA-Seq, we observed a large-scale up-regulation of RNA in zygotes derived from Pabpn1l-/- MII oocytes. We found that 9222 genes were up-regulated instead of being degraded in the Pabpn1l-♀/+♂zygote. Both the Btg4 and Cnot61 genes are necessary for the deadenylation process and Pabpn1l -/- resembled both the Btg4 and Cnot6l knockouts, where 71.2% genes stabilized in the Btg4-♀/+♂ zygote and 84.2% genes stabilized in the Cnot6l-♀/+♂zygote were also stabilized in Pabpn1l-♀/+♂ zygote. BTG4/CNOT7/CNOT6L was partially co-located with PABPN1L in MII oocytes. The above results suggest that PABPN1L is widely associated with CCR4-NOT-mediated maternal mRNA degradation and PABPN1L variants on intron1-exon2 could be a genetic marker of female infertility. Summary sentence. "Ring-like" PABPN1L aggregates was found in the cytoplasm of MII oocytes and in vitro; intron1-exon2 abnormality of Pabpn1l leads female sterile in mice.
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Affiliation(s)
- Ying Wang
- State Key Laboratory of Reproductive Medicine, Department of Reproduction, Women's Hospital of Nanjing Medical University, Nanjing Maternity and Child Health Care Hospital, Nanjing, 210004, China
| | - Tianhao Feng
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, Nanjing Medical University, Nanjing, 211166, China
| | - Mingcong Zhu
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, Nanjing Medical University, Nanjing, 211166, China
| | - Xiaodan Shi
- State Key Laboratory of Reproductive Medicine, Department of Reproduction, Women's Hospital of Nanjing Medical University, Nanjing Maternity and Child Health Care Hospital, Nanjing, 210004, China
| | - Zerui Wang
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, Nanjing Medical University, Nanjing, 211166, China
| | - Siyu Liu
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, Nanjing Medical University, Nanjing, 211166, China
| | - Xin Zhang
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, Nanjing Medical University, Nanjing, 211166, China
| | - Jintao Zhang
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, Nanjing Medical University, Nanjing, 211166, China
| | - Shuqin Zhao
- State Key Laboratory of Reproductive Medicine, Animal Core Facility of Nanjing Medical University, Nanjing 211166, China
| | - Junqiang Zhang
- State Key Laboratory of Reproductive Medicine, Department of Reproduction, Women's Hospital of Nanjing Medical University, Nanjing Maternity and Child Health Care Hospital, Nanjing, 210004, China
| | - Xiufeng Ling
- State Key Laboratory of Reproductive Medicine, Department of Reproduction, Women's Hospital of Nanjing Medical University, Nanjing Maternity and Child Health Care Hospital, Nanjing, 210004, China
| | - Mingxi Liu
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, Nanjing Medical University, Nanjing, 211166, China
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Wang D, Sun H, Zhang J, Huang Z, Li C, Han L, Xin Y, Tang S, Ge J, Wang Q. FKBP25 Regulates Meiotic Apparatus During Mouse Oocyte Maturation. Front Cell Dev Biol 2021; 9:625805. [PMID: 33553183 PMCID: PMC7859338 DOI: 10.3389/fcell.2021.625805] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Accepted: 01/04/2021] [Indexed: 11/13/2022] Open
Abstract
FK506 binding proteins 25 (FKBP25) has been shown to function in ribosome biogenesis, chromatin organization, and microtubule stability in mitosis. However, the role of FKBP25 in oocyte maturation has not been investigated. Here, we report that oocytes with FKBP25 depletion display abnormal spindle assembly and chromosomes alignment, with defective kinetochore-microtubule attachment. Consistent with this finding, aneuploidy incidence is also elevated in oocytes depleted of FKBP25. Importantly, FKBP25 protein level in old oocytes is significantly reduced, and ectopic expression of FKBP25 could partly rescue the aging-associated meiotic defects. In addition, by employing site-specific mutagenesis, we identify that serine 163 is a major, if not unique, phosphorylation site modulating the action of FKBP25 on meiotic maturation. In summary, our data indicate that FKBP25 is a pivotal factor for determining oocyte quality, and may mediate the effects of maternal aging on female reproduction.
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Affiliation(s)
- Danni Wang
- State Key Laboratory of Reproductive Medicine, Suzhou Municipal Hospital, Nanjing Medical University, Nanjing, China
| | - Hongzheng Sun
- State Key Laboratory of Reproductive Medicine, Suzhou Municipal Hospital, Nanjing Medical University, Nanjing, China
| | - Jiaqi Zhang
- State Key Laboratory of Reproductive Medicine, Suzhou Municipal Hospital, Nanjing Medical University, Nanjing, China
| | - Zhenyue Huang
- State Key Laboratory of Reproductive Medicine, Suzhou Municipal Hospital, Nanjing Medical University, Nanjing, China
| | - Congyang Li
- State Key Laboratory of Reproductive Medicine, Suzhou Municipal Hospital, Nanjing Medical University, Nanjing, China
| | - Longsen Han
- State Key Laboratory of Reproductive Medicine, Suzhou Municipal Hospital, Nanjing Medical University, Nanjing, China
| | - Yongan Xin
- State Key Laboratory of Reproductive Medicine, Suzhou Municipal Hospital, Nanjing Medical University, Nanjing, China
| | - Shoubin Tang
- State Key Laboratory of Reproductive Medicine, Suzhou Municipal Hospital, Nanjing Medical University, Nanjing, China
| | - Juan Ge
- State Key Laboratory of Reproductive Medicine, Suzhou Municipal Hospital, Nanjing Medical University, Nanjing, China
| | - Qiang Wang
- State Key Laboratory of Reproductive Medicine, Suzhou Municipal Hospital, Nanjing Medical University, Nanjing, China.,Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing, China
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Lee SH, Saadeldin IM. Exosomes as a Potential Tool for Supporting Canine Oocyte Development. Animals (Basel) 2020; 10:ani10111971. [PMID: 33121043 PMCID: PMC7693116 DOI: 10.3390/ani10111971] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2020] [Revised: 10/24/2020] [Accepted: 10/25/2020] [Indexed: 12/27/2022] Open
Abstract
Simple Summary To date, extracellular vesicles, including exosomes, have markedly gained attention in scientific research because of their physiological homogeneity as well as stability for transporting regulatory molecules to recipient cells. Recently, it has been shown that exosomes impact gametes and embryo development in several mammalian species; however, there is still scant information on the physiological effects of exosomes on the canine reproduction system. In this regard, we elucidate the possible roles of exosomes involvement in oviduct and cumulus-oocyte complexes mutual communications and how oviduct regulates their development via molecular signaling pathways. Abstract The canine oviduct is a unique reproductive organ where the ovulated immature oocytes complete their maturation, while the other mammals ovulate matured gametes. Due to their peculiar reproductive characteristics, the in vitro maturation of dog oocytes is still not wellestablished compared with other mammals. Investigations of the microenvironment conditions in the oviductal canal are required to establish a reliable in vitro maturation system in the dog. Previous studies have suggested that the oviduct and its derivatives play a key role in improving fertilization as well as embryo development. In particular, the biological function of oviduct-derived exosomes on sperm and early embryo development has been investigated in porcine, bovine, and murine species. However, the information about their functions on canine cumulus-oocyte complexes is still elusive. Recent canine reproductive studies demonstrated how oviduct-derived extracellular vesicles such as microvesicles and exosomes interact with oocyte-cumulus complexes and how they can play roles in regulating canine cumulus/oocyte communications. In this review, we summarize the physiological characteristics of canine oviduct-derived exosomes and their potential effects on cumulus cells development as well as oocyte in vitro maturation via molecular signaling pathways.
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Affiliation(s)
- Seok Hee Lee
- Center for Reproductive Sciences, Department of Obstetrics and Gynecology, University of California San Francisco, San Francisco, CA 94143, USA
- Correspondence:
| | - Islam M. Saadeldin
- Department of Animal Production, College of Food and Agriculture Sciences, King Saud University, Riyadh 44511, Saudi Arabia;
- Department of Comparative Medicine, King Faisal Specialist Hospital & Research Centre, Riyadh 11211, Saudi Arabia
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6
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Liu X, Hao Y, Li Z, Zhou J, Zhu H, Bu G, Liu Z, Hou X, Zhang X, Miao YL. Maternal Cytokines CXCL12, VEGFA, and WNT5A Promote Porcine Oocyte Maturation via MAPK Activation and Canonical WNT Inhibition. Front Cell Dev Biol 2020; 8:578. [PMID: 32733887 PMCID: PMC7358312 DOI: 10.3389/fcell.2020.00578] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Accepted: 06/15/2020] [Indexed: 12/21/2022] Open
Abstract
Maternal regulatory factors endow the oocyte with developmental competence in vivo, which might be absent in current in vitro maturation (IVM) systems, thereby compromising oocyte quality. In the present study, by employing RNA sequencing data analysis, we expect to identify potential contributing factors to support porcine oocyte maturation through binding to their receptors on the oolemma. Here, C-X-C motif chemokine ligand 12 (CXCL12), vascular endothelial growth factor A (VEGFA), and Wingless-type MMTV integration site family member 5A (WNT5A), termed CVW, are selected and confirmed to be important maternal cytokines for porcine oocyte maturation. Combined supplementation of CVW promotes the nuclear maturation percentage from 57.2% in controls to 75.9%. More importantly, these maternal cytokines improve the developmental potential of matured oocytes by parthenogenesis, fertilization, and cloning, as their blastocyst formation efficiencies and total cell numbers are increased. CVW supplementation also enlarges perivitelline space and promotes cumulus expansion, which results in a more complete transzonal projection retraction on the zona pellucida, and a reduced incidence of polyspermy in fertilized oocytes. Meanwhile, inhibiting the CVW receptor-mediated signaling pathways severely impairs oocyte meiotic resumption and cumulus expansion during IVM. We further determine that maturation improvement by CVW is achieved through activating the MAPK pathway in advance and inhibiting the canonical WNT pathway at the end of the IVM period. These findings provide a new combination of three cytokines to promote the porcine IVM process, which also holds potential to be used in human assisted reproduction technologies as well as in other species.
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Affiliation(s)
- Xin Liu
- Institute of Stem Cell and Regenerative Biology, College of Animal Science and Veterinary Medicine, Huazhong Agricultural University, Wuhan, China.,Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction (Huazhong Agricultural University), Ministry of Education, Wuhan, China
| | - Yuchen Hao
- Institute of Stem Cell and Regenerative Biology, College of Animal Science and Veterinary Medicine, Huazhong Agricultural University, Wuhan, China.,Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction (Huazhong Agricultural University), Ministry of Education, Wuhan, China
| | - Zhekun Li
- Institute of Stem Cell and Regenerative Biology, College of Animal Science and Veterinary Medicine, Huazhong Agricultural University, Wuhan, China.,Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction (Huazhong Agricultural University), Ministry of Education, Wuhan, China
| | - Jilong Zhou
- Institute of Stem Cell and Regenerative Biology, College of Animal Science and Veterinary Medicine, Huazhong Agricultural University, Wuhan, China.,Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction (Huazhong Agricultural University), Ministry of Education, Wuhan, China
| | - Hongmei Zhu
- College of Animal Science and Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Guowei Bu
- Institute of Stem Cell and Regenerative Biology, College of Animal Science and Veterinary Medicine, Huazhong Agricultural University, Wuhan, China.,Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction (Huazhong Agricultural University), Ministry of Education, Wuhan, China
| | - Zhiting Liu
- Institute of Stem Cell and Regenerative Biology, College of Animal Science and Veterinary Medicine, Huazhong Agricultural University, Wuhan, China.,Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction (Huazhong Agricultural University), Ministry of Education, Wuhan, China
| | - Xudong Hou
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Xia Zhang
- College of Animal Science and Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Yi-Liang Miao
- Institute of Stem Cell and Regenerative Biology, College of Animal Science and Veterinary Medicine, Huazhong Agricultural University, Wuhan, China.,Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction (Huazhong Agricultural University), Ministry of Education, Wuhan, China.,The Cooperative Innovation Center for Sustainable Pig Production, Huazhong Agricultural University, Wuhan, China
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7
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Li H, You L, Tian Y, Guo J, Fang X, Zhou C, Shi L, Su Y. DPAGT1-Mediated Protein N-Glycosylation Is Indispensable for Oocyte and Follicle Development in Mice. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 7:2000531. [PMID: 32714760 PMCID: PMC7375233 DOI: 10.1002/advs.202000531] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 04/29/2020] [Indexed: 05/11/2023]
Abstract
Post-translational modification of proteins by N-linked glycosylation is crucial for many life processes. However, the exact contribution of N-glycosylation to mammalian female reproduction remains largely undefined. Here, DPAGT1, the enzyme that catalyzes the first step of protein N-glycosylation, is identified to be indispensable for oocyte development in mice. Dpagt1 missense mutation (c. 497A>G; p. Asp166Gly) causes female subfertility without grossly affecting other functions. Mutant females ovulate fewer eggs owing to defective development of growing follicles. Mutant oocytes have a thin and fragile zona pellucida (ZP) due to the reduction in glycosylation of ZP proteins, and display poor developmental competence after fertilization in vitro. Moreover, completion of the first meiosis is accelerated in mutant oocytes, which is coincident with the elevation of aneuploidy. Mechanistically, transcriptomic analysis reveals the downregulation of a number of transcripts essential for oocyte meiotic progression and preimplantation development (e.g., Pttgt1, Esco2, Orc6, and Npm2) in mutant oocytes, which could account for the defects observed. Furthermore, conditional knockout of Dpagt1 in oocytes recapitulates the phenotypes observed in Dpagt1 mutant females, and causes complete infertility. Taken together, these data indicate that protein N-glycosylation in oocytes is essential for female fertility in mammals by specific control of oocyte development.
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Affiliation(s)
- Hui Li
- State Key Laboratory of Reproductive MedicineNanjing Medical UniversityNanjing211166P. R. China
| | - Liji You
- State Key Laboratory of Reproductive MedicineNanjing Medical UniversityNanjing211166P. R. China
| | - Yufeng Tian
- State Key Laboratory of Reproductive MedicineNanjing Medical UniversityNanjing211166P. R. China
| | - Jing Guo
- State Key Laboratory of Reproductive MedicineNanjing Medical UniversityNanjing211166P. R. China
| | - Xianbao Fang
- State Key Laboratory of Reproductive MedicineNanjing Medical UniversityNanjing211166P. R. China
| | - Chenmin Zhou
- State Key Laboratory of Reproductive MedicineNanjing Medical UniversityNanjing211166P. R. China
| | - Lanying Shi
- State Key Laboratory of Reproductive MedicineNanjing Medical UniversityNanjing211166P. R. China
| | - You‐Qiang Su
- State Key Laboratory of Reproductive MedicineNanjing Medical UniversityNanjing211166P. R. China
- Women's Hospital of Nanjing Medical UniversityNanjing Maternity and Child Health HospitalNanjing Medical UniversityNanjing211166P. R. China
- Collaborative Innovation Center of Genetics and DevelopmentFudan UniversityShanghai200433P. R. China
- Key Laboratory of Model Animal ResearchNanjing Medical UniversityNanjing211166P. R. China
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8
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Oqani RK, Lin T, Lee JE, Kim SY, Kang JW, Jin DI. Effects of CDK inhibitors on the maturation, transcription, and MPF activity of porcine oocytes. Reprod Biol 2017; 17:320-326. [DOI: 10.1016/j.repbio.2017.09.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Revised: 09/01/2017] [Accepted: 09/02/2017] [Indexed: 01/08/2023]
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9
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López-Cardona AP, Pérez-Cerezales S, Fernández-González R, Laguna-Barraza R, Pericuesta E, Agirregoitia N, Gutiérrez-Adán A, Agirregoitia E. CB 1 cannabinoid receptor drives oocyte maturation and embryo development via PI3K/Akt and MAPK pathways. FASEB J 2017; 31:3372-3382. [PMID: 28428264 DOI: 10.1096/fj.201601382rr] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2016] [Accepted: 04/05/2017] [Indexed: 11/11/2022]
Abstract
Endocannabinoids have been recognized as mediators of practically all reproductive events in mammals. However, little is known about the role of this system in oocyte maturation. In a mouse model, we observed that activation of cannabinoid receptor 1 (CB1) during in vitro oocyte maturation modulated the phosphorylation status of Akt and ERK1/2 and enhanced the subsequent embryo production. In the absence of CB1, in vivo oocyte maturation was impaired and embryo development delayed. Cannabinoid receptor 2 (CB2) was unable to rescue these effects. Finally, we confirmed abnormal oocyte maturation rather than impaired embryonic transport through the oviduct in CB1 knockouts. Our data suggest that cannabinoid agonists may be useful in vitro maturation supplements. For in vitro fertilization patients intolerant to gonadotropins, this could be a promising and only option.-López-Cardona, A. P., Pérez-Cerezales, S., Fernández-González, R., Laguna-Barraza, R., Pericuesta, E., Agirregoitia, N., Gutiérrez-Adán, A., Agirregoitia, E. CB1 cannabinoid receptor drives oocyte maturation and embryo development via PI3K/Akt and MAPK pathways.
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Affiliation(s)
- Angela Patricia López-Cardona
- Department of Animal Reproduction, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Madrid, Spain.,Groupo de Investigación (G.I.)-Biogénesis, Universidad de Antioquia, Medellín, Colombia
| | - Serafín Pérez-Cerezales
- Department of Animal Reproduction, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Madrid, Spain
| | - Raúl Fernández-González
- Department of Animal Reproduction, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Madrid, Spain
| | - Ricardo Laguna-Barraza
- Department of Animal Reproduction, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Madrid, Spain
| | - Eva Pericuesta
- Department of Animal Reproduction, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Madrid, Spain
| | - Naiara Agirregoitia
- Department of Physiology, Faculty of Medicine and Nursing University of the Basque Country (UPV/EHU), Leioa, Bizkaia
| | - Alfonso Gutiérrez-Adán
- Department of Animal Reproduction, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Madrid, Spain
| | - Ekaitz Agirregoitia
- Department of Physiology, Faculty of Medicine and Nursing University of the Basque Country (UPV/EHU), Leioa, Bizkaia
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10
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Hu MW, Meng TG, Jiang ZZ, Dong MZ, Schatten H, Xu X, Wang ZB, Sun QY. Protein Phosphatase 6 Protects Prophase I-Arrested Oocytes by Safeguarding Genomic Integrity. PLoS Genet 2016; 12:e1006513. [PMID: 27930667 PMCID: PMC5179128 DOI: 10.1371/journal.pgen.1006513] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2016] [Revised: 12/22/2016] [Accepted: 11/29/2016] [Indexed: 12/21/2022] Open
Abstract
Mammalian oocytes are arrested at prophase of the first meiotic division in the primordial follicle pool for months, even years, after birth depending on species, and only a limited number of oocytes resume meiosis, complete maturation, and ovulate with each reproductive cycle. We recently reported that protein phosphatase 6 (PP6), a member of the PP2A-like subfamily, which accounts for cellular serine/threonine phosphatase activity, functions in completing the second meiosis. Here, we generated mutant mice with a specific deletion of Ppp6c in oocytes from the primordial follicle stage by crossing Ppp6cF/F mice with Gdf9-Cre mice and found that Ppp6cF/F; GCre+ mice are infertile. Depletion of PP6c caused folliculogenesis defects and germ cell loss independent of the traditional AKT/mTOR pathway, but due to persistent phosphorylation of H2AX (a marker of double strand breaks), increased susceptibility to DNA damage and defective DNA repair, which led to massive oocyte elimination and eventually premature ovarian failure (POF). Our findings uncover an important role for PP6 as an indispensable guardian of genomic integrity of the lengthy prophase I oocyte arrest, maintenance of primordial follicle pool, and thus female fertility. Formation of haploid gametes from diploid germ cells requires a specialized reductive cell division known as meiosis. In contrast to male meiosis that takes place continuously, a unique feature of female meiosis in mammals is the long arrest in meiosis I, which lasts up to 50 years in humans. Because the size of the germ cell pool determines the reproductive lifespan of females, it is important to discover mechanisms preserving the germ cell pool during the lengthy meiotic arrest. In this study, we examined the physiological role of a member of the PP2A-like serine/threonine phosphatase subfamily, protein phosphatase 6, in mouse oocytes during ovarian follicular development. This is the first study linking PP6 to the maintenance of the female germ cell pool and fertility. We find PP6 is an indispensable protector of arrested oocytes by safeguarding genomic integrity during their dormancy in the mouse ovary.
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Affiliation(s)
- Meng-Wen Hu
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Tie-Gang Meng
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Zong-Zhe Jiang
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Ming-Zhe Dong
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Heide Schatten
- Department of Veterinary Pathobiology, University of Missouri, Columbia, MO, United States of America
| | - Xingzhi Xu
- Beijing Key Laboratory of DNA Damage Response and College of Life Sciences, Capital Normal University, Beijing, China
| | - Zhen-Bo Wang
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Qing-Yuan Sun
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
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11
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Agirregoitia E, Totorikaguena L, Expósito A, Mendoza R, Matorras R, Agirregoitia N. Dynamic of expression and localization of cannabinoid-degrading enzymes FAAH and MGLL in relation to CB1 during meiotic maturation of human oocytes. Cell Tissue Res 2016; 365:393-401. [PMID: 26948343 DOI: 10.1007/s00441-016-2381-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2015] [Accepted: 02/19/2016] [Indexed: 12/11/2022]
Abstract
The endogenous cannabinoid system has been characterized in some female reproductive organs but little is known about the expression and localization pattern of cannabinoid-degrading enzymes in relation to the CB1 cannabinoid receptor in human oocytes. In this study, we focus on the investigation of the presence and differential distribution of fatty acid amide hydrolase (FAAH) and monoglyceride lipase (MGLL) in relation to CB1 during the maturation of human oocytes. We used a total of 290 human oocytes not suitable for in vitro fertilization/intracytoplasmic sperm injection (ICSI): germinal-vesicle (GV) and metaphase-I (MI) stages and metaphase-II (MII) oocytes that had not developed into an embryo after ICSI. Cannabinoid-degrading enzymes and the cannabinoid CB1 receptor were present in human oocytes. Specifically, FAAH was detected in the periphery of the oocyte from the GV to MI stage and co-localized with CB1. Later, by the MII stage, FAAH was spread within the oocyte, whereas MGLL immunostaining was homogeneous across the oocyte at all stages of maturation and only overlapped with CB1 at the GV stage. This coordinated redistribution of cannabinoid system proteins suggests a role for this system in the maturation of the female gamete.
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Affiliation(s)
- Ekaitz Agirregoitia
- Department of Physiology, Faculty of Medicine and Dentistry, University of the Basque Country, Barrio Sarriena s/n, Leioa, 48940, Bizkaia, Spain.
| | - Lide Totorikaguena
- Department of Physiology, Faculty of Medicine and Dentistry, University of the Basque Country, Barrio Sarriena s/n, Leioa, 48940, Bizkaia, Spain
| | - Antonia Expósito
- Human Reproduction Unit, Cruces University Hospital, University of the Basque Country, Plaza de Cruces s/n, Barakaldo, 48903, Bizkaia, Spain
| | - Rosario Mendoza
- Human Reproduction Unit, Cruces University Hospital, University of the Basque Country, Plaza de Cruces s/n, Barakaldo, 48903, Bizkaia, Spain
| | - Roberto Matorras
- Human Reproduction Unit, Cruces University Hospital, University of the Basque Country, Plaza de Cruces s/n, Barakaldo, 48903, Bizkaia, Spain
| | - Naiara Agirregoitia
- Department of Physiology, Faculty of Medicine and Dentistry, University of the Basque Country, Barrio Sarriena s/n, Leioa, 48940, Bizkaia, Spain
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12
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Xu W, Li H, Zhang N, Dong Z, Wang N, Shao C, Chen S. Expression analysis and characterization of an autosome-localized tesk1 gene in half-smooth tongue sole (Cynoglossus semilaevis). Gene 2016; 582:161-7. [PMID: 26869317 DOI: 10.1016/j.gene.2016.02.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Revised: 01/21/2016] [Accepted: 02/04/2016] [Indexed: 01/29/2023]
Abstract
Testis-specific protein kinase 1 (tesk1) represents a conserved gene family functioning in many cellular processes. In this study, we cloned and characterized an autosome-localized tesk1 gene (Altesk1) from Cynoglossus semilaevis. The open reading frame consists of 2088 nucleotides and encodes a 665 amino acid polypeptide. Phylogenetic analyses show that vertebrate Tesk1s are divided into two clusters based on protein length and AlTesk1 belongs to "long-type" group. Semi-quantitative PCR reveals that Altesk1 is predominantly expressed in ovary, despite of relatively low detection in some other tissues. Among different development stages, Altesk1 transcripts are only observed in ovary samples of 210-day and 1-year fish. In situ hybridization analyses have further confirmed its major localization in oocyte cells. Comparison of methylation patterns in different sexual genotypes reveals the low methylation level of Altesk1 promoter in female, which is consistent with Altesk1 high expression level in female. Taken together, this is the first time that tesk1 gene has been found to show female-biased expression and in view of this, we postulate that AlTesk1 might be involved in some cellular processes specific in ovary, e.g. oogenesis.
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Affiliation(s)
- Wenteng Xu
- Yellow Sea Fisheries Research Institute, CAFS, Key Lab for Sustainable Development of Marine Fisheries, Ministry of Agriculture, Qingdao 266071, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
| | - Hailong Li
- Yellow Sea Fisheries Research Institute, CAFS, Key Lab for Sustainable Development of Marine Fisheries, Ministry of Agriculture, Qingdao 266071, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
| | - Ning Zhang
- Yellow Sea Fisheries Research Institute, CAFS, Key Lab for Sustainable Development of Marine Fisheries, Ministry of Agriculture, Qingdao 266071, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
| | - Zhongdian Dong
- Yellow Sea Fisheries Research Institute, CAFS, Key Lab for Sustainable Development of Marine Fisheries, Ministry of Agriculture, Qingdao 266071, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
| | - Na Wang
- Yellow Sea Fisheries Research Institute, CAFS, Key Lab for Sustainable Development of Marine Fisheries, Ministry of Agriculture, Qingdao 266071, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
| | - Changwei Shao
- Yellow Sea Fisheries Research Institute, CAFS, Key Lab for Sustainable Development of Marine Fisheries, Ministry of Agriculture, Qingdao 266071, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
| | - Songlin Chen
- Yellow Sea Fisheries Research Institute, CAFS, Key Lab for Sustainable Development of Marine Fisheries, Ministry of Agriculture, Qingdao 266071, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China.
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13
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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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14
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Monteiro da Rocha A, Ding J, Slawny N, Wolf AM, Smith GD. Loss of glycogen synthase kinase 3 isoforms during murine oocyte growth induces offspring cardiac dysfunction. Biol Reprod 2015; 92:127. [PMID: 25833158 DOI: 10.1095/biolreprod.115.128181] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2015] [Accepted: 03/19/2015] [Indexed: 12/22/2022] Open
Abstract
Glycogen synthase kinase-3 (GSK3) is a constitutively active serine threonine kinase with 1) two isoforms (GSK3A and GSK3B) that have unique and overlapping functions, 2) multiple molecular intracellular mechanisms that involve phosphorylation of diverse substrates, and 3) implications in pathogenesis of many diseases. Insulin causes phosphorylation and inactivation of GSK3 and mammalian oocytes have a functional insulin-signaling pathway whereby prolonged elevated insulin during follicle/oocyte development causes GSK3 hyperphosphorylation, reduced GSK3 activity, and altered oocyte chromatin remodeling. Periconceptional diabetes and chronic hyperinsulinemia are associated with congenital malformations and onset of adult diseases of cardiovascular origin. Objectives were to produce transgenic mice with individual or concomitant loss of GSK3A and/or GSK3B and investigate the in vivo role of oocyte GSK3 on fertility, fetal development, and offspring health. Wild-type males bred to females with individual or concomitant loss of oocyte GSK3 isoforms did not have reduced fertility. However, concomitant loss of GSK3A and GSK3B in the oocyte significantly increased neonatal death rate due to congestive heart failure secondary to ventricular hyperplasia. Individual loss of oocyte GSK3A or GSK3B did not induce this lethal phenotype. In conclusion, absence of oocyte GSK3 in the periconceptional period does not alter fertility yet causes offspring cardiac hyperplasia, cardiovascular defects, and significant neonatal death. These results support a developmental mechanism by which periconceptional hyperinsulinemia associated with maternal metabolic syndrome, obesity, and/or diabetes can act on the oocyte and affect offspring cardiovascular development, function, and congenital heart malformation.
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Affiliation(s)
| | - Jun Ding
- Department of Obstetrics and Gynecology, University of Michigan, Ann Arbor, Michigan
| | - Nicole Slawny
- Department of Obstetrics and Gynecology, University of Michigan, Ann Arbor, Michigan
| | - Amber M Wolf
- Unit for Laboratory Animal Medicine, University of Michigan, Ann Arbor, Michigan
| | - Gary D Smith
- Department of Obstetrics and Gynecology, University of Michigan, Ann Arbor, Michigan Department of Urology, University of Michigan, Ann Arbor, Michigan Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, Michigan
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15
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An RNAi-based suppressor screen identifies interactors of the Myt1 ortholog of Caenorhabditis elegans. G3-GENES GENOMES GENETICS 2014; 4:2329-43. [PMID: 25298536 PMCID: PMC4267929 DOI: 10.1534/g3.114.013649] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Oocyte maturation in all species is controlled by a protein complex termed the maturation promoting factor (MPF). MPF comprises a cyclin-dependent kinase (CDK) and its partner cyclin, and it is regulated by dueling regulatory phosphorylation events on the CDK. In Caenorhabditis elegans, the Wee1/Myt1 ortholog WEE-1.3 provides the inhibitory phosphorylations on CDK-1 that keep MPF inactive and halt meiosis. Prior work has shown that depletion of WEE-1.3 in C. elegans results in precocious oocyte maturation in vivo and a highly penetrant infertility phenotype. This study sought to further define the precocious maturation phenotype and to identify novel interactors with WEE-1.3. We found that WEE-1.3 is expressed throughout the germline and in developing embryos in a perinuclear pattern, and demonstrated that oocytes in WEE-1.3–depleted germlines have begun to transcribe embryonic genes and exhibit inappropriate expression of proteins normally restricted to fertilized eggs. In addition, we performed an RNAi suppressor screen of the infertile phenotype to identify novel factors that, when co-depleted with WEE-1.3, restore fertility to these animals. We screened ∼1900 essential genes by RNAi feeding and identified 44 (∼2% of the tested genes) that are suppressors of the WEE-1.3 depletion phenotype. The suppressors include many previously unidentified players in the meiotic cell cycle and represent a pool of potential WEE-1.3 interacting proteins that function during C. elegans oocyte maturation and zygotic development.
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16
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Zhang N, Fissore RA. Role of caspase-3 cleaved IP3 R1 on Ca(2+) homeostasis and developmental competence of mouse oocytes and eggs. J Cell Physiol 2014; 229:1842-54. [PMID: 24692207 DOI: 10.1002/jcp.24638] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2013] [Accepted: 03/28/2014] [Indexed: 11/12/2022]
Abstract
Apoptosis in most cell types is accompanied by altered Ca(2+) homeostasis. During apoptosis, caspase-3 mediated cleavage of the type 1 inositol 1,4,5-trisphosphate receptor (IP3 R1) generates a 95-kDa C-terminal fragment (C-IP3 R1), which represents the channel domain of the receptor. Aged mouse eggs display abnormal Ca(2+) homeostasis and express C-IP3 R1, although whether or not C-IP3 R1 expression contributes to Ca(2+) misregulation or a decrease in developmental competency is unknown. We sought to answer these questions by injecting in mouse oocytes and eggs cRNAs encoding C-IP3 R1. We found that: (1) expression of C-IP3 R1 in eggs lowered the Ca(2+) content of the endoplasmic reticulum (ER), although, as C-IP3 R1 is quickly degraded at this stage, its expression did not impair pre-implantation embryo development; (2) expression of C-IP3 R1 in eggs enhanced fragmentation associated with aging; (3) endogenous IP3 R1 is required for aging associated apoptosis, as its down-regulation prevented fragmentation, and expression of C-IP3 R1 in eggs with downregulated IP3 R1 partly restored fragmentation; (4) C-IP3 R1 expression in GV oocytes resulted in persistent levels of protein, which abolished the increase in the ER releasable Ca(2+) pool that occurs during maturation, undermined the Ca(2+) oscillatory ability of matured eggs and their activation potential. Collectively, this study supports a role for IP3 R1 and C-IP3 R1 in regulating Ca(2+) homeostasis and the ER Ca(2+) content during oocyte maturation. Nevertheless, the role of C-IP3 R1 on Ca(2+) homeostasis in aged eggs seems minor, as in MII eggs the majority of endogenous IP3 R1 remains intact and C-IP3 R1 undergoes rapid turnover.
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Affiliation(s)
- Nan Zhang
- Department of Veterinary and Animal Sciences, University of Massachusetts Amherst, Amherst, Massachusetts
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17
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Matthews LM, Evans JP. α-endosulfine (ENSA) regulates exit from prophase I arrest in mouse oocytes. Cell Cycle 2014; 13:1639-49. [PMID: 24675883 DOI: 10.4161/cc.28606] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Mammalian oocytes in ovarian follicles are arrested in meiosis at prophase I. This arrest is maintained until ovulation, upon which the oocyte exits from this arrest, progresses through meiosis I and to metaphase of meiosis II. The progression from prophase I to metaphase II, known as meiotic maturation, is mediated by signals that coordinate these transitions in the life of the oocyte. ENSA (α-endosulfine) and ARPP19 (cAMP-regulated phosphoprotein-19) have emerged as regulators of M-phase, with function in inhibition of protein phosphatase 2A (PP2A) activity. Inhibition of PP2A maintains the phosphorylated state of CDK1 substrates, thus allowing progression into and/or maintenance of an M-phase state. We show here ENSA in mouse oocytes plays a key role in the progression from prophase I arrest into M-phase of meiosis I. The majority of ENSA-deficient oocytes fail to exit from prophase I arrest. This function of ENSA in oocytes is dependent on PP2A, and specifically on the regulatory subunit PPP2R2D (also known as B55δ). Treatment of ENSA-deficient oocytes with Okadaic acid to inhibit PP2A rescues the defect in meiotic progression, with Okadaic acid-treated, ENSA-deficient oocytes being able to exit from prophase I arrest. Similarly, oocytes deficient in both ENSA and PPP2R2D are able to exit from prophase I arrest to an extent similar to wild-type oocytes. These data are evidence of a role for ENSA in regulating meiotic maturation in mammalian oocytes, and also have potential relevance to human oocyte biology, as mouse and human have genes encoding both Arpp19 and Ensa.
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Affiliation(s)
- Lauren M Matthews
- Department of Biochemistry and Molecular Biology; Bloomberg School of Public Health; Johns Hopkins University; Baltimore, MD USA
| | - Janice P Evans
- Department of Biochemistry and Molecular Biology; Bloomberg School of Public Health; Johns Hopkins University; Baltimore, MD USA
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18
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Toms D, Tsoi S, Dobrinsky J, Dyck MK, Li J. The effects of glial cell line-derived neurotrophic factor on the in vitro matured porcine oocyte transcriptome. Mol Reprod Dev 2014; 81:217-29. [DOI: 10.1002/mrd.22288] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2013] [Accepted: 11/26/2013] [Indexed: 12/21/2022]
Affiliation(s)
- Derek Toms
- Department of Animal and Poultry Science; University of Guelph; Guelph Canada
| | - Stephen Tsoi
- Department of Agricultural; Food and Nutritional Science; University of Alberta; Edmonton Canada
| | - John Dobrinsky
- International Center of Biotechnology; Minitube of America; Mt. Horeb Wisconsin
| | - Michael K. Dyck
- Department of Agricultural; Food and Nutritional Science; University of Alberta; Edmonton Canada
| | - Julang Li
- Department of Animal and Poultry Science; University of Guelph; Guelph Canada
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19
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Pomerantz Y, Elbaz J, Ben-Eliezer I, Reizel Y, David Y, Galiani D, Nevo N, Navon A, Dekel N. From ubiquitin-proteasomal degradation to CDK1 inactivation: requirements for the first polar body extrusion in mouse oocytes. FASEB J 2012; 26:4495-505. [PMID: 22859367 DOI: 10.1096/fj.12-209866] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Completion of the first meiotic division, manifested by extrusion of the first polar body (PBI), depends on proteasomal degradation of cyclin B1 and securin and the subsequent respective CDK1 inactivation and chromosome segregation. We aimed at identifying the polyubiquitin signal that mediates proteasomal action and at a better characterization of the role of CDK1 inactivation at this stage of meiosis. Microinjections of mutated ubiquitin proteins into mouse oocytes revealed that interference with lysine-11 polyubiquitin chains abrogated chromosome segregation and reduced PBI extrusion by 63% as compared to WT ubiquitin-injected controls. Inactivation of CDK1 in oocytes arrested at first metaphase by a proteasome inhibitor fully rescued PBI extrusion. However, removal of CDK1 inhibition failed to allow progression to the second metaphase, rather, inducing PBI reengulfment in 62% of the oocytes. Inhibition of either PLK1 or MEK1/2 during the first anaphase changed spindle dimensions. The PLK1 inhibitor also blocked PBI emission and prevented RhoA translocation. Our results identified lysine-11 rather than the canonic lysine-48 ubiquitin chains as the degradation signal in oocytes resuming meiosis, further disclosing that CDK1 inactivation is necessary and sufficient for PBI emission. This information significantly contributes to our understanding of faulty chromosome segregation that may lead to aneuploidy.
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Affiliation(s)
- Yael Pomerantz
- Department of Biological Regulation, The Weizmann Institute of Science, Rehovot, Israel
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20
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Kloc M, Ghobrial RM, Borsuk E, Kubiak JZ. Polarity and asymmetry during mouse oogenesis and oocyte maturation. Results Probl Cell Differ 2012; 55:23-44. [PMID: 22918799 DOI: 10.1007/978-3-642-30406-4_2] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Cell polarity and asymmetry play a fundamental role in embryo development. The unequal segregation of determinants, cues, and activities is the major event in the differentiation of cell fate and function in all multicellular organisms. In oocytes, polarity and asymmetry in the distribution of different molecules are prerequisites for the progression and proper outcome of embryonic development. The mouse oocyte, like the oocytes of other mammals, seems to apply a less stringent strategy of polarization than other vertebrates. The mouse embryo undergoes a regulative type of development, which permits the full rectification of development even if the embryo loses up to half of its cells or its size is experimentally doubled during the early stages of embryogenesis. Such pliability is strongly related to the proper oocyte polarization before fertilization. Thus, the molecular mechanisms leading to the development and maintenance of oocyte polarity must be included in any fundamental understanding of the principles of embryo development. In this chapter, we provide an overview of current knowledge regarding the development and maintenance of polarity and asymmetry in the distribution of organelles and molecules in the mouse oocyte. Curiously, the mouse oocyte becomes polarized at least twice during ontogenesis; the question of how this phenomenon is achieved and what role it might play is addressed in this chapter.
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Affiliation(s)
- Malgorzata Kloc
- The Methodist Hospital, Department of Surgery, Houston, TX, USA.
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21
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Abstract
Entry into, and passage through, the two meiotic divisions of the oocyte has to be highly coordinated to ensure proper segregation of chromosomes. This coordination ensures that the hallmark stops and starts of the meiotic process occur at the right time to prevent aneuploidy. The Anaphase-Promoting Complex is an activity mostly studied in the mitotic cell cycle division, where it has essential functions during mitosis. As detailed here the Anaphase-Promoting Complex also plays vital roles in controlling at least three meiotic events: maintenance of prophase I arrest, timely and faithful segregation of homologous chromosomes in meiosis I, and the meiotic arrest following ovulation.
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Affiliation(s)
- Keith T Jones
- University of Newcastle, 2308 Newcastle, NSW, Australia.
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