1
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Unoki M, Uemura S, Fujimoto A, Sasaki H. The maternal protein NLRP5 stabilizes UHRF1 in the cytoplasm: implication for the pathogenesis of multilocus imprinting disturbance. Hum Mol Genet 2024:ddae096. [PMID: 38868925 DOI: 10.1093/hmg/ddae096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2024] [Revised: 05/28/2024] [Accepted: 05/30/2024] [Indexed: 06/14/2024] Open
Abstract
We have recently discovered that the so-called subcortical maternal complex (SCMC) proteins composing of cytoplasmic lattices are destabilized in Uhrf1 knockout murine fully grown oocytes (FGOs). Here we report that human UHRF1 interacts with human NLRP5 and OOEP, which are core components of the SCMC. Moreover, NLRP5 and OOEP interact with DPPA3, which is an essential factor for exporting UHRF1 from the nucleus to the cytoplasm in oocytes. We identify that NLRP5, not OOEP, stabilizes UHRF1 protein in the cytoplasm utilizing specifically engineered cell lines mimicking UHRF1 status in oocytes and preimplantation embryos. Further, UHRF1 is destabilized both in the cytoplasm and nucleus of Nlrp5 knockout murine FGOs. Since pathogenic variants of the SCMC components frequently cause multilocus imprinting disturbance and UHRF1 is essential for maintaining CpG methylation of imprinting control regions during preimplantation development, our results suggest possible pathogenesis behind the disease, which has been a long-standing mystery.
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Affiliation(s)
- Motoko Unoki
- Department of Human Genetics, School of International Health, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- Division of Epigenomics and Development, Medical Institute of Bioregulation, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka-shi, Fukuoka 812-8582, Japan
| | - Shuhei Uemura
- Division of Epigenomics and Development, Medical Institute of Bioregulation, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka-shi, Fukuoka 812-8582, Japan
- Department of Genome Biology, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita-shi, Osaka 565-0871, Japan
| | - Akihiro Fujimoto
- Department of Human Genetics, School of International Health, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Hiroyuki Sasaki
- Division of Epigenomics and Development, Medical Institute of Bioregulation, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka-shi, Fukuoka 812-8582, Japan
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2
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Zhang X, Zheng PS. Mechanism of chromosomal mosaicism in preimplantation embryos and its effect on embryo development. J Assist Reprod Genet 2024; 41:1127-1141. [PMID: 38386118 PMCID: PMC11143108 DOI: 10.1007/s10815-024-03048-2] [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: 09/11/2023] [Accepted: 01/30/2024] [Indexed: 02/23/2024] Open
Abstract
Aneuploidy is one of the main causes of miscarriage and in vitro fertilization failure. Mitotic abnormalities in preimplantation embryos are the main cause of mosaicism, which may be influenced by several endogenous factors such as relaxation of cell cycle control mechanisms, defects in chromosome cohesion, centrosome aberrations and abnormal spindle assembly, and DNA replication stress. In addition, incomplete trisomy rescue is a rare cause of mosaicism. However, there may be a self-correcting mechanism in mosaic embryos, which allows some mosaicisms to potentially develop into normal embryos. At present, it is difficult to accurately diagnose mosaicism using preimplantation genetic testing for aneuploidy. Therefore, in clinical practice, embryos diagnosed as mosaic should be considered comprehensively based on the specific situation of the patient.
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Affiliation(s)
- Xue Zhang
- Department of Reproductive Medicine, The First Affiliated Hospital, Xi'an Jiaotong University of Medical School, Xi'an, 710061, Shanxi, P.R. China
| | - Peng-Sheng Zheng
- Department of Reproductive Medicine, The First Affiliated Hospital, Xi'an Jiaotong University of Medical School, Xi'an, 710061, Shanxi, P.R. China.
- Section of Cancer Stem Cell Research, Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education of People's Republic of China, Xi'an, 710061, Shanxi, P.R. China.
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3
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Sun Q, Yang Y, Zhang Y, Chen D, Zheng H, Qin G, Fu Q. Padi6 expression patterns in buffalo oocytes and preimplantation embryos. Anim Reprod 2024; 21:e20230146. [PMID: 38562607 PMCID: PMC10984561 DOI: 10.1590/1984-3143-ar2023-0146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Accepted: 02/26/2024] [Indexed: 04/04/2024] Open
Abstract
The subcortical maternal complex, which consists of maternal-effect genes, plays a crucial role in the development of oocytes and preimplantation embryo until the activation of the zygote genome. One such gene, known as peptidyl-arginine deiminase VI (Padi6), is involved in the oocyte maturation, fertilization and embryonic development. However, the precise function of Padi6 gene in buffalo is still unclear and requires further investigation. In this study, the sequence, mRNA and protein expression patterns of Padi6 gene were analyzed in oocytes, preimplantation embryos and somatic tissues of buffalo. The coding sequence of gene was successfully cloned and characterized. Real-time quantitative PCR results indicated an absence of Padi6 transcripts in somatic tissues. Notably, the expression levels of Padi6 in oocytes showed an increased from the germinal vesicle stage to metaphase II stage, followed by a rapid decrease during the morula and blastocyst stages. Immunofluorescence analysis confirmed these findings, revealing a noticeable decline in protein expression levels. Our research provides the initial comprehensive expression profile of Padi6 in buffalo oocytes and preimplantation embryos, serving as a solid foundation for further investigations into the functionality of maternal-effect genes in buffalo.
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Affiliation(s)
- Qinqiang Sun
- College of Animal Science and Technology, Guangxi University, Nanning, Guangxi, China
| | - Yuan Yang
- College of Animal Science and Technology, Guangxi University, Nanning, Guangxi, China
| | - Yue Zhang
- College of Animal Science and Technology, Guangxi University, Nanning, Guangxi, China
| | - Dongrong Chen
- College of Animal Science and Technology, Guangxi University, Nanning, Guangxi, China
| | - Haiying Zheng
- Buffalo Research Institute, Chinese Academy of Agricultural Sciences, Nanning, Guangxi, China
| | - Guangsheng Qin
- Buffalo Research Institute, Chinese Academy of Agricultural Sciences, Nanning, Guangxi, China
| | - Qiang Fu
- College of Animal Science and Technology, Guangxi University, Nanning, Guangxi, China
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4
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Zhang T, Xing F, Qu M, Yang Z, Liu Y, Yao Y, Xing N. NLRP2 in health and disease. Immunology 2024; 171:170-180. [PMID: 37735978 DOI: 10.1111/imm.13699] [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: 01/09/2023] [Accepted: 09/08/2023] [Indexed: 09/23/2023] Open
Abstract
NLR family pyrin domain containing 2 (NLRP2) is a novel member of the Nod-like receptor (NLR) family. However, our understanding of NLRP2 has long been ambiguous. NLRP2 may have a role in the innate immune response, but its 'specific' functions remain controversial. Although NLRP2 can initiate inflammasome and promote inflammation, it can also downregulate inflammatory signals. Additionally, NLRP2 has been reported to function in the reproductive system and shows high expression in the placenta. However, the exact role of NLRP2 in the reproductive system is unclear. Here, we highlight the most current progress on NLRP2 in inflammasome activation, effector function and regulation of nuclear factor-κB. And we discuss functions of NLRP2 in inflammatory diseases, reproductive disorders and the potential implication of NLRP2 in human diseases.
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Affiliation(s)
- Tongtong Zhang
- Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Fei Xing
- Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
- Henan Province International Joint Laboratory of Pain, Cognition and Emotion, Zhengzhou, Henan, China
| | - Mingcui Qu
- Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Zhihu Yang
- Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Yafei Liu
- Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Yongchao Yao
- Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Na Xing
- Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
- Henan Province International Joint Laboratory of Pain, Cognition and Emotion, Zhengzhou, Henan, China
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5
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Chi P, Ou G, Qin D, Han Z, Li J, Xiao Q, Gao Z, Xu C, Qi Q, Liu Q, Liu S, Li J, Guo L, Lu Y, Chen J, Wang X, Shi H, Li L, Deng D. Structural basis of the subcortical maternal complex and its implications in reproductive disorders. Nat Struct Mol Biol 2024; 31:115-124. [PMID: 38177687 DOI: 10.1038/s41594-023-01153-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Accepted: 10/16/2023] [Indexed: 01/06/2024]
Abstract
The subcortical maternal complex (SCMC) plays a crucial role in early embryonic development. Malfunction of SCMC leads to reproductive diseases in women. However, the molecular function and assembly basis for SCMC remain elusive. Here we reconstituted mouse SCMC and solved the structure at atomic resolution using single-particle cryo-electron microscopy. The core complex of SCMC was formed by MATER, TLE6 and FLOPED, and MATER embraced TLE6 and FLOPED via its NACHT and LRR domains. Two core complexes further dimerize through interactions between two LRR domains of MATERs in vitro. FILIA integrates into SCMC by interacting with the carboxyl-terminal region of FLOPED. Zygotes from mice with Floped C-terminus truncation showed delayed development and resembled the phenotype of zygotes from Filia knockout mice. More importantly, the assembly of mouse SCMC was affected by corresponding clinical variants associated with female reproductive diseases and corresponded with a prediction based on the mouse SCMC structure. Our study paves the way for further investigations on SCMC functions during mammalian preimplantation embryonic development and reveals underlying causes of female reproductive diseases related to SCMC mutations, providing a new strategy for the diagnosis of female reproductive disorders.
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Affiliation(s)
- Pengliang Chi
- Department of Obstetrics, Key Laboratory of Birth Defects and Related Disease of Women and Children of MOE, State Key Laboratory of Biotherapy, West China Second Hospital, Sichuan University, Chengdu, China
| | - Guojin Ou
- Department of Obstetrics, Key Laboratory of Birth Defects and Related Disease of Women and Children of MOE, State Key Laboratory of Biotherapy, West China Second Hospital, Sichuan University, Chengdu, China
- Clinical Laboratory, West China Second Hospital, Sichuan University, Chengdu, China
| | - Dandan Qin
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Stem Cell and Regeneration, Beijing Institute of Stem Cell and Regenerative Medicine, Institute of Zoology, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, China
| | - Zhuo Han
- Department of Obstetrics, Key Laboratory of Birth Defects and Related Disease of Women and Children of MOE, State Key Laboratory of Biotherapy, West China Second Hospital, Sichuan University, Chengdu, China
- NHC Key Laboratory of Chronobiology, Sichuan University, Chengdu, China
- Development and Related Diseases of Women and Children Key Laboratory of Sichuan Province, Sichuan University, Chengdu, China
| | - Jialu Li
- Department of Obstetrics, Key Laboratory of Birth Defects and Related Disease of Women and Children of MOE, State Key Laboratory of Biotherapy, West China Second Hospital, Sichuan University, Chengdu, China
- NHC Key Laboratory of Chronobiology, Sichuan University, Chengdu, China
- Development and Related Diseases of Women and Children Key Laboratory of Sichuan Province, Sichuan University, Chengdu, China
| | - Qingjie Xiao
- Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China
| | - Zheng Gao
- Department of Obstetrics and Gynecology, Center for Reproductive Medicine, Guangdong Provincial Key Laboratory of Major Obstetric Diseases, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Chengpeng Xu
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Stem Cell and Regeneration, Beijing Institute of Stem Cell and Regenerative Medicine, Institute of Zoology, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, China
| | - Qianqian Qi
- Clinical Laboratory, West China Second Hospital, Sichuan University, Chengdu, China
| | - Qingting Liu
- Department of Obstetrics, Key Laboratory of Birth Defects and Related Disease of Women and Children of MOE, State Key Laboratory of Biotherapy, West China Second Hospital, Sichuan University, Chengdu, China
| | - Sibei Liu
- Department of Obstetrics, Key Laboratory of Birth Defects and Related Disease of Women and Children of MOE, State Key Laboratory of Biotherapy, West China Second Hospital, Sichuan University, Chengdu, China
| | - Jinhong Li
- Department of Obstetrics, Key Laboratory of Birth Defects and Related Disease of Women and Children of MOE, State Key Laboratory of Biotherapy, West China Second Hospital, Sichuan University, Chengdu, China
| | - Li Guo
- Department of Obstetrics, Key Laboratory of Birth Defects and Related Disease of Women and Children of MOE, State Key Laboratory of Biotherapy, West China Second Hospital, Sichuan University, Chengdu, China
| | - Yuechao Lu
- Department of Obstetrics, Key Laboratory of Birth Defects and Related Disease of Women and Children of MOE, State Key Laboratory of Biotherapy, West China Second Hospital, Sichuan University, Chengdu, China
- Department of Reproductive Medicine, West China Second Hospital, Sichuan University, Chengdu, China
| | - Jing Chen
- Laboratory of Pediatric Surgery, Department of Pediatric Surgery, West China Hospital, Sichuan University, Chengdu, China
| | - Xiang Wang
- Department of Obstetrics, Key Laboratory of Birth Defects and Related Disease of Women and Children of MOE, State Key Laboratory of Biotherapy, West China Second Hospital, Sichuan University, Chengdu, China
- NHC Key Laboratory of Chronobiology, Sichuan University, Chengdu, China
- Development and Related Diseases of Women and Children Key Laboratory of Sichuan Province, Sichuan University, Chengdu, China
| | - Hubing Shi
- Department of Obstetrics, Key Laboratory of Birth Defects and Related Disease of Women and Children of MOE, State Key Laboratory of Biotherapy, West China Second Hospital, Sichuan University, Chengdu, China
- Laboratory of Integrative Medicine, Clinical Research Center for Breast, West China Hospital, Sichuan University and Collaborative Innovation Center, Chengdu, China
| | - Lei Li
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Stem Cell and Regeneration, Beijing Institute of Stem Cell and Regenerative Medicine, Institute of Zoology, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, China.
| | - Dong Deng
- Department of Obstetrics, Key Laboratory of Birth Defects and Related Disease of Women and Children of MOE, State Key Laboratory of Biotherapy, West China Second Hospital, Sichuan University, Chengdu, China.
- NHC Key Laboratory of Chronobiology, Sichuan University, Chengdu, China.
- Development and Related Diseases of Women and Children Key Laboratory of Sichuan Province, Sichuan University, Chengdu, China.
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6
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Ermisch AF, Wood JR. Regulation of Oocyte mRNA Metabolism: A Key Determinant of Oocyte Developmental Competence. ADVANCES IN ANATOMY, EMBRYOLOGY, AND CELL BIOLOGY 2024; 238:23-46. [PMID: 39030353 DOI: 10.1007/978-3-031-55163-5_2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/21/2024]
Abstract
The regulation of mRNA transcription and translation is uncoupled during oogenesis. The reason for this uncoupling is two-fold. Chromatin is only accessible to the transcriptional machinery during the growth phase as it condenses prior to resumption of meiosis to ensure faithful segregation of chromosomes during meiotic maturation. Thus, transcription rates are high during this time period in order to produce all of the transcripts needed for meiosis, fertilization, and embryo cleavage until the newly formed embryonic genome becomes transcriptionally active. To ensure appropriate timing of key developmental milestones including chromatin condensation, resumption of meiosis, segregation of chromosomes, and polar body extrusion, the translation of protein from transcripts synthesized during oocyte growth must be temporally regulated. This is achieved by the regulation of mRNA interaction with RNA binding proteins and shortening and lengthening of the poly(A) tail. This chapter details the essential factors that regulate the dynamic changes in mRNA synthesis, storage, translation, and degradation during oocyte growth and maturation.
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Affiliation(s)
- Alison F Ermisch
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE, USA
| | - Jennifer R Wood
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE, USA.
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7
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Jentoft IMA, Bäuerlein FJB, Welp LM, Cooper BH, Petrovic A, So C, Penir SM, Politi AZ, Horokhovskyi Y, Takala I, Eckel H, Moltrecht R, Lénárt P, Cavazza T, Liepe J, Brose N, Urlaub H, Fernández-Busnadiego R, Schuh M. Mammalian oocytes store proteins for the early embryo on cytoplasmic lattices. Cell 2023; 186:5308-5327.e25. [PMID: 37922900 DOI: 10.1016/j.cell.2023.10.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 08/01/2023] [Accepted: 10/02/2023] [Indexed: 11/07/2023]
Abstract
Mammalian oocytes are filled with poorly understood structures called cytoplasmic lattices. First discovered in the 1960s and speculated to correspond to mammalian yolk, ribosomal arrays, or intermediate filaments, their function has remained enigmatic to date. Here, we show that cytoplasmic lattices are sites where oocytes store essential proteins for early embryonic development. Using super-resolution light microscopy and cryoelectron tomography, we show that cytoplasmic lattices are composed of filaments with a high surface area, which contain PADI6 and subcortical maternal complex proteins. The lattices associate with many proteins critical for embryonic development, including proteins that control epigenetic reprogramming of the preimplantation embryo. Loss of cytoplasmic lattices by knocking out PADI6 or the subcortical maternal complex prevents the accumulation of these proteins and results in early embryonic arrest. Our work suggests that cytoplasmic lattices enrich maternally provided proteins to prevent their premature degradation and cellular activity, thereby enabling early mammalian development.
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Affiliation(s)
- Ida M A Jentoft
- Department of Meiosis, Max Planck Institute for Multidisciplinary Sciences, 37077 Göttingen, Germany
| | - Felix J B Bäuerlein
- Institute for Neuropathology, University Medical Center Göttingen, 37077 Göttingen, Germany; Cluster of Excellence "Multiscale Bioimaging: from Molecular Machines to Networks of Excitable Cells" (MBExC), University of Göttingen, 37077 Göttingen, Germany
| | - Luisa M Welp
- Bioanalytical Mass Spectrometry Group, Max Planck Institute for Multidisciplinary Sciences, 37077 Göttingen, Germany; Institute of Clinical Chemistry, University Medical Center Göttingen, 37075 Göttingen, Germany
| | - Benjamin H Cooper
- Department of Molecular Neurobiology, Max Planck Institute for Multidisciplinary Sciences, 37075 Göttingen, Germany
| | - Arsen Petrovic
- Institute for Neuropathology, University Medical Center Göttingen, 37077 Göttingen, Germany; Cluster of Excellence "Multiscale Bioimaging: from Molecular Machines to Networks of Excitable Cells" (MBExC), University of Göttingen, 37077 Göttingen, Germany
| | - Chun So
- Department of Meiosis, Max Planck Institute for Multidisciplinary Sciences, 37077 Göttingen, Germany
| | - Sarah Mae Penir
- Department of Meiosis, Max Planck Institute for Multidisciplinary Sciences, 37077 Göttingen, Germany
| | - Antonio Z Politi
- Facility for Light Microscopy, Max Planck Institute for Multidisciplinary Sciences, 37077 Göttingen, Germany
| | - Yehor Horokhovskyi
- Quantitative and Systems Biology Group, Max Planck Institute for Multidisciplinary Sciences, 37077 Göttingen, Germany
| | - Iina Takala
- Quantitative and Systems Biology Group, Max Planck Institute for Multidisciplinary Sciences, 37077 Göttingen, Germany
| | - Heike Eckel
- Kinderwunschzentrum Göttingen, 37081 Göttingen, Germany
| | | | - Peter Lénárt
- Facility for Light Microscopy, Max Planck Institute for Multidisciplinary Sciences, 37077 Göttingen, Germany
| | - Tommaso Cavazza
- Department of Meiosis, Max Planck Institute for Multidisciplinary Sciences, 37077 Göttingen, Germany
| | - Juliane Liepe
- Quantitative and Systems Biology Group, Max Planck Institute for Multidisciplinary Sciences, 37077 Göttingen, Germany
| | - Nils Brose
- Cluster of Excellence "Multiscale Bioimaging: from Molecular Machines to Networks of Excitable Cells" (MBExC), University of Göttingen, 37077 Göttingen, Germany; Department of Molecular Neurobiology, Max Planck Institute for Multidisciplinary Sciences, 37075 Göttingen, Germany
| | - Henning Urlaub
- Cluster of Excellence "Multiscale Bioimaging: from Molecular Machines to Networks of Excitable Cells" (MBExC), University of Göttingen, 37077 Göttingen, Germany; Bioanalytical Mass Spectrometry Group, Max Planck Institute for Multidisciplinary Sciences, 37077 Göttingen, Germany; Institute of Clinical Chemistry, University Medical Center Göttingen, 37075 Göttingen, Germany; Göttingen Center for Molecular Biosciences, Georg-August University Göttingen, 37077 Göttingen, Germany
| | - Rubén Fernández-Busnadiego
- Institute for Neuropathology, University Medical Center Göttingen, 37077 Göttingen, Germany; Cluster of Excellence "Multiscale Bioimaging: from Molecular Machines to Networks of Excitable Cells" (MBExC), University of Göttingen, 37077 Göttingen, Germany; Faculty of Physics, Georg-August-Universität Göttingen, 37077 Göttingen, Germany
| | - Melina Schuh
- Department of Meiosis, Max Planck Institute for Multidisciplinary Sciences, 37077 Göttingen, Germany; Cluster of Excellence "Multiscale Bioimaging: from Molecular Machines to Networks of Excitable Cells" (MBExC), University of Göttingen, 37077 Göttingen, Germany.
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8
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Williams JPC, Walport LJ. PADI6: What we know about the elusive fifth member of the peptidyl arginine deiminase family. Philos Trans R Soc Lond B Biol Sci 2023; 378:20220242. [PMID: 37778376 PMCID: PMC10542454 DOI: 10.1098/rstb.2022.0242] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Accepted: 03/05/2023] [Indexed: 10/03/2023] Open
Abstract
Peptidyl arginine deiminase 6 (PADI6) is a maternal factor that is vital for early embryonic development. Deletion and mutations of its encoding gene in female mice or women lead to early embryonic developmental arrest, female infertility, maternal imprinting defects and hyperproliferation of the trophoblast. PADI6 is the fifth and least well-characterized member of the peptidyl arginine deiminases (PADIs), which catalyse the post-translational conversion of arginine to citrulline. It is less conserved than the other PADIs, and currently has no reported catalytic activity. While there are many suggested functions of PADI6 in the early mouse embryo, including in embryonic genome activation, cytoplasmic lattice formation, maternal mRNA and ribosome regulation, and organelle distribution, the molecular mechanisms of its function remain unknown. In this review, we discuss what is known about the function of PADI6 and highlight key outstanding questions that must be answered if we are to understand the crucial role it plays in early embryo development and female fertility. This article is part of the Theo Murphy meeting issue 'The virtues and vices of protein citrullination'.
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Affiliation(s)
| | - Louise J. Walport
- Imperial College of Science Technology and Medicine, London, W12 0BZ, UK
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9
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Anvar Z, Chakchouk I, Sharif M, Mahadevan S, Nasiotis ET, Su L, Liu Z, Wan YW, Van den Veyver IB. Loss of the Maternal Effect Gene Nlrp2 Alters the Transcriptome of Ovulated Mouse Oocytes and Impacts Expression of Histone Demethylase KDM1B. Reprod Sci 2023; 30:2780-2793. [PMID: 36976514 PMCID: PMC10524210 DOI: 10.1007/s43032-023-01218-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Accepted: 03/09/2023] [Indexed: 03/29/2023]
Abstract
The subcortical maternal complex (SCMC) is a multiprotein complex in oocytes and preimplantation embryos that is encoded by maternal effect genes. The SCMC is essential for zygote-to-embryo transition, early embryogenesis, and critical zygotic cellular processes, including spindle positioning and symmetric division. Maternal deletion of Nlrp2, which encodes an SCMC protein, results in increased early embryonic loss and abnormal DNA methylation in embryos. We performed RNA sequencing on pools of meiosis II (MII) oocytes from wild-type and Nlrp2-null female mice that were isolated from cumulus-oocyte complexes (COCs) after ovarian stimulation. Using a mouse reference genome-based analysis, we found 231 differentially expressed genes (DEGs) in Nlrp2-null compared to WT oocytes (123 up- and 108 downregulated; adjusted p < 0.05). The upregulated genes include Kdm1b, a H3K4 histone demethylase required during oocyte development for the establishment of DNA methylation marks at CpG islands, including those at imprinted genes. The identified DEGs are enriched for processes involved in neurogenesis, gland morphogenesis, and protein metabolism and for post-translationally methylated proteins. When we compared our RNA sequencing data to an oocyte-specific reference transcriptome that contains many previously unannotated transcripts, we found 228 DEGs, including genes not identified with the first analysis. Interestingly, 68% and 56% of DEGs from the first and second analyses, respectively, overlap with oocyte-specific hyper- and hypomethylated domains. This study shows that there are substantial changes in the transcriptome of mouse MII oocytes from female mice with loss of function of Nlrp2, a maternal effect gene that encodes a member of the SCMC.
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Affiliation(s)
- Zahra Anvar
- Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, TX, USA
- Duncan Neurological Research Institute, Texas Children's Hospital, Houston, TX, USA
| | - Imen Chakchouk
- Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, TX, USA
- Duncan Neurological Research Institute, Texas Children's Hospital, Houston, TX, USA
| | - Momal Sharif
- Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, TX, USA
- Duncan Neurological Research Institute, Texas Children's Hospital, Houston, TX, USA
| | - Sangeetha Mahadevan
- Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, TX, USA
- Duncan Neurological Research Institute, Texas Children's Hospital, Houston, TX, USA
| | - Eleni Theodora Nasiotis
- Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, TX, USA
- Duncan Neurological Research Institute, Texas Children's Hospital, Houston, TX, USA
| | - Li Su
- Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, TX, USA
- Duncan Neurological Research Institute, Texas Children's Hospital, Houston, TX, USA
| | - Zhandong Liu
- Department of Pediatrics - Neurology, Baylor College of Medicine, Houston, TX, USA
| | - Ying-Wooi Wan
- Duncan Neurological Research Institute, Texas Children's Hospital, Houston, TX, USA.
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.
| | - Ignatia B Van den Veyver
- Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, TX, USA.
- Duncan Neurological Research Institute, Texas Children's Hospital, Houston, TX, USA.
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.
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10
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Gu L, Li X, Zhu W, Shen Y, Wang Q, Liu W, Zhang J, Zhang H, Li J, Li Z, Liu Z, Li C, Wang H. Ultrasensitive proteomics depicted an in-depth landscape for the very early stage of mouse maternal-to-zygotic transition. J Pharm Anal 2023; 13:942-954. [PMID: 37719194 PMCID: PMC10499587 DOI: 10.1016/j.jpha.2023.05.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 05/05/2023] [Accepted: 05/08/2023] [Indexed: 09/19/2023] Open
Abstract
Single-cell or low-input multi-omics techniques have revolutionized the study of pre-implantation embryo development. However, the single-cell or low-input proteomic research in this field is relatively underdeveloped because of the higher threshold of the starting material for mammalian embryo samples and the lack of hypersensitive proteome technology. In this study, a comprehensive solution of ultrasensitive proteome technology (CS-UPT) was developed for single-cell or low-input mouse oocyte/embryo samples. The deep coverage and high-throughput routes significantly reduced the starting material and were selected by investigators based on their demands. Using the deep coverage route, we provided the first large-scale snapshot of the very early stage of mouse maternal-to-zygotic transition, including almost 5,500 protein groups from 20 mouse oocytes or zygotes for each sample. Moreover, significant protein regulatory networks centered on transcription factors and kinases between the MII oocyte and 1-cell embryo provided rich insights into minor zygotic genome activation.
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Affiliation(s)
- Lei Gu
- Center for Single-Cell Omics, School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Xumiao Li
- Center for Single-Cell Omics, School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Wencheng Zhu
- Institute of Neuroscience, CAS Center for Excellence in Brain Science and Intelligence Technology, CAS Key Laboratory of Primate Neurobiology, State Key Laboratory of Neuroscience, Chinese Academy of Sciences, Shanghai, 200031, China
- Shanghai Center for Brain Science and Brain-Inspired Intelligence Technology, Shanghai, 200031, China
| | - Yi Shen
- Shanghai Applied Protein Technology Co., Ltd., Shanghai, 201100, China
| | - Qinqin Wang
- Center for Single-Cell Omics, School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Wenjun Liu
- Institute of Neuroscience, CAS Center for Excellence in Brain Science and Intelligence Technology, CAS Key Laboratory of Primate Neurobiology, State Key Laboratory of Neuroscience, Chinese Academy of Sciences, Shanghai, 200031, China
- University of Chinese Academy of Sciences, Beijing, 101408, China
| | - Junfeng Zhang
- Shanghai Applied Protein Technology Co., Ltd., Shanghai, 201100, China
| | - Huiping Zhang
- Shanghai Applied Protein Technology Co., Ltd., Shanghai, 201100, China
| | - Jingquan Li
- Center for Single-Cell Omics, School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Ziyi Li
- Shanghai Applied Protein Technology Co., Ltd., Shanghai, 201100, China
| | - Zhen Liu
- Institute of Neuroscience, CAS Center for Excellence in Brain Science and Intelligence Technology, CAS Key Laboratory of Primate Neurobiology, State Key Laboratory of Neuroscience, Chinese Academy of Sciences, Shanghai, 200031, China
- Shanghai Center for Brain Science and Brain-Inspired Intelligence Technology, Shanghai, 200031, China
| | - Chen Li
- Center for Single-Cell Omics, School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Hui Wang
- Center for Single-Cell Omics, School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
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11
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Ozturk S. Genetic variants underlying developmental arrests in human preimplantation embryos. Mol Hum Reprod 2023; 29:gaad024. [PMID: 37335858 DOI: 10.1093/molehr/gaad024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 06/03/2023] [Indexed: 06/21/2023] Open
Abstract
Developmental arrest in preimplantation embryos is one of the major causes of assisted reproduction failure. It is briefly defined as a delay or a failure of embryonic development in producing viable embryos during ART cycles. Permanent or partial developmental arrest can be observed in the human embryos from one-cell to blastocyst stages. These arrests mainly arise from different molecular biological defects, including epigenetic disturbances, ART processes, and genetic variants. Embryonic arrests were found to be associated with a number of variants in the genes playing key roles in embryonic genome activation, mitotic divisions, subcortical maternal complex formation, maternal mRNA clearance, repairing DNA damage, transcriptional, and translational controls. In this review, the biological impacts of these variants are comprehensively evaluated in the light of existing studies. The creation of diagnostic gene panels and potential ways of preventing developmental arrests to obtain competent embryos are also discussed.
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Affiliation(s)
- Saffet Ozturk
- Department of Histology and Embryology, Akdeniz University School of Medicine, Antalya, Turkey
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12
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Xing X, Peng J, Zhao J, Shi R, Wang C, Zhang Z, Wang Z, Li Z, Wu Z. Luteolin regulates the distribution and function of organelles by controlling SIRT1 activity during postovulatory oocyte aging. Front Nutr 2023; 10:1192758. [PMID: 37583461 PMCID: PMC10424794 DOI: 10.3389/fnut.2023.1192758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Accepted: 07/04/2023] [Indexed: 08/17/2023] Open
Abstract
The quality of oocytes determines their development competence, which will be rapidly lost if the oocytes are not fertilized at the proper time after ovulation. SIRT1, one of the sirtuin family members, has been proven to protect the quality of oocytes during postovulatory oocyte aging. However, evidence of the effect of SIRT1 on the activity of organelles including the mitochondria, the endoplasmic reticulum (ER), the Golgi apparatus, and the lysosomes in postovulatory aging oocyte is lacking. In this study, we investigated the distribution and function of organelles in postovulatory aged oocytes and discovered abnormalities. Luteolin, which is a natural flavonoid contained in vegetables and fruits, is an activator of SIRT1. When the oocytes were treated with luteolin, the abnormal distribution of mitochondria, ER, and Golgi complex were restored during postovulatory oocyte aging. The ER stress protein GRP78 and the lysosome protein LAMP1 increased, while the mitochondrial membrane potential and the Golgi complex protein GOLPH3 decreased in aged oocytes, and these were restored by luteolin treatment. EX-527, an inhibitor of SIRT1, disrupted the luteolin-mediated normal distribution and function of mitochondria, ER, Golgi apparatus, and lysosomes. In conclusion, we demonstrate that luteolin regulates the distribution and function of mitochondria, ER, Golgi apparatus, and lysosomes during postovulatory oocyte aging by activating SIRT1.
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Affiliation(s)
- Xupeng Xing
- National Engineering Research Center for Breeding Swine Industry, South China Agricultural University, Guangzhou, China
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science, South China Agricultural University, Guangzhou, China
| | - Jingfeng Peng
- National Engineering Research Center for Breeding Swine Industry, South China Agricultural University, Guangzhou, China
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science, South China Agricultural University, Guangzhou, China
| | - Jingyu Zhao
- Collaborative Innovation Center for Birth Defect Research and Transformation of Shandong Province, Jining Medical University, Jining, China
- College of Second Clinical Medical, Jining Medical University, Jining, China
| | - Ruoxi Shi
- Collaborative Innovation Center for Birth Defect Research and Transformation of Shandong Province, Jining Medical University, Jining, China
- College of Second Clinical Medical, Jining Medical University, Jining, China
| | - Caiqin Wang
- Collaborative Innovation Center for Birth Defect Research and Transformation of Shandong Province, Jining Medical University, Jining, China
- College of Second Clinical Medical, Jining Medical University, Jining, China
| | - Zihan Zhang
- Collaborative Innovation Center for Birth Defect Research and Transformation of Shandong Province, Jining Medical University, Jining, China
- College of Second Clinical Medical, Jining Medical University, Jining, China
| | - Zihan Wang
- Collaborative Innovation Center for Birth Defect Research and Transformation of Shandong Province, Jining Medical University, Jining, China
- College of Second Clinical Medical, Jining Medical University, Jining, China
| | - Zicong Li
- National Engineering Research Center for Breeding Swine Industry, South China Agricultural University, Guangzhou, China
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science, South China Agricultural University, Guangzhou, China
| | - Zhenfang Wu
- National Engineering Research Center for Breeding Swine Industry, South China Agricultural University, Guangzhou, China
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science, South China Agricultural University, Guangzhou, China
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13
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Trapphoff T, Dieterle S. Cryopreservation of Ovarian and Testicular Tissue and the Influence on Epigenetic Pattern. Int J Mol Sci 2023; 24:11061. [PMID: 37446239 DOI: 10.3390/ijms241311061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 06/29/2023] [Accepted: 07/02/2023] [Indexed: 07/15/2023] Open
Abstract
Ovarian tissue cryopreservation (OTC) or testicular tissue cryopreservation (TTC) are effective and often the only options for fertility preservation in female or male patients due to oncological, medical, or social aspects. While TTC and resumption of spermatogenesis, either in vivo or in vitro, has still be considered an experimental approach in humans, OTC and autotransplantation has been applied increasingly to preserve fertility, with more than 200 live births worldwide. However, the cryopreservation of reproductive cells followed by the resumption of gametogenesis, either in vivo or in vitro, may interfere with sensitive and highly regulated cellular processes. In particular, the epigenetic profile, which includes not just reversible modifications of the DNA itself but also post-translational histone modifications, small non-coding RNAs, gene expression and availability, and storage of related proteins or transcripts, have to be considered in this context. Due to complex reprogramming and maintenance mechanisms of the epigenome in germ cells, growing embryos, and offspring, OTC and TTC are carried out at very critical moments early in the life cycle. Given this background, the safety of OTC and TTC, taking into account the epigenetic profile, has to be clarified. Cryopreservation of mature germ cells (including metaphase II oocytes and mature spermatozoa collected via ejaculation or more invasively after testicular biopsy) or embryos has been used successfully for many years in medically assisted reproduction (MAR). However, tissue freezing followed by in vitro or in vivo gametogenesis has become more attractive in the past, while few human studies have analysed the epigenetic effects, with most data deriving from animal studies. In this review, we highlight the potential influence of the cryopreservation of immature germ cells and subsequent in vivo or in vitro growth and differentiation on the epigenetic profile (including DNA methylation, post-translational histone modifications, and the abundance and availability of relevant transcripts and proteins) in humans and animals.
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Affiliation(s)
| | - Stefan Dieterle
- Dortmund Fertility Centre, 44135 Dortmund, Germany
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Witten/Herdecke University, 44135 Dortmund, Germany
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14
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Li H, Zhao H, Yang C, Su R, Long M, Liu J, Shi L, Xue Y, Su Y. LSM14B is an Oocyte-Specific RNA-Binding Protein Indispensable for Maternal mRNA Metabolism and Oocyte Development in Mice. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2300043. [PMID: 37083226 PMCID: PMC10288277 DOI: 10.1002/advs.202300043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Revised: 03/28/2023] [Indexed: 05/03/2023]
Abstract
Mammalian oogenesis features reliance on the mRNAs produced and stored during early growth phase. These are essential for producing an oocyte competent to undergo meiotic maturation and embryogenesis later when oocytes are transcriptionally silent. The fate of maternal mRNAs hence ensures the success of oogenesis and the quality of the resulting eggs. Nevertheless, how the fate of maternal mRNAs is determined remains largely elusive. RNA-binding proteins (RBPs) are crucial regulators of oogenesis, yet the identity of the full complement of RBPs expressed in oocytes is unknown. Here, a global view of oocyte-expressed RBPs is presented: mRNA-interactome capture identifies 1396 RBPs in mouse oocytes. An analysis of one of these RBPs, LSM family member 14 (LSM14B), demonstrates that this RBP is specific to oocytes and associated with many networks essential for oogenesis. Deletion of Lsm14b results in female-specific infertility and a phenotype characterized by oocytes incompetent to complete meiosis and early embryogenesis. LSM14B serves as an interaction hub for proteins and mRNAs throughout oocyte development and regulates translation of a subset of its bound mRNAs. Therefore, RNP complexes tethered by LSM14B are found exclusively in oocytes and are essential for the control of maternal mRNA fate and oocyte development.
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Affiliation(s)
- Hui Li
- Shandong Provincial Key Laboratory of Animal Cells and Developmental BiologySchool of Life SciencesShandong UniversityQingdao266237P. R. China
- State Key Laboratory of Reproductive MedicineNanjing Medical UniversityNanjing211126P. R. China
| | - Hailian Zhao
- Institute of BiophysicsChinese Academy of SciencesBeijing100101P. R. China
| | - Chunhui Yang
- Shandong Provincial Key Laboratory of Animal Cells and Developmental BiologySchool of Life SciencesShandong UniversityQingdao266237P. R. China
| | - Ruibao Su
- Institute of BiophysicsChinese Academy of SciencesBeijing100101P. R. China
| | - Min Long
- Shandong Provincial Key Laboratory of Animal Cells and Developmental BiologySchool of Life SciencesShandong UniversityQingdao266237P. R. China
- State Key Laboratory of Reproductive MedicineNanjing Medical UniversityNanjing211126P. R. China
| | - Jinliang Liu
- Shandong Provincial Key Laboratory of Animal Cells and Developmental BiologySchool of Life SciencesShandong UniversityQingdao266237P. R. China
| | - Lanying Shi
- Shandong Provincial Key Laboratory of Animal Cells and Developmental BiologySchool of Life SciencesShandong UniversityQingdao266237P. R. China
- State Key Laboratory of Reproductive MedicineNanjing Medical UniversityNanjing211126P. R. China
| | - Yuanchao Xue
- Institute of BiophysicsChinese Academy of SciencesBeijing100101P. R. China
| | - You‐Qiang Su
- Shandong Provincial Key Laboratory of Animal Cells and Developmental BiologySchool of Life SciencesShandong UniversityQingdao266237P. R. China
- State Key Laboratory of Reproductive MedicineNanjing Medical UniversityNanjing211126P. R. China
- Collaborative Innovation Center of Genetics and DevelopmentFudan UniversityShanghai200433P. R. China
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15
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Han J, Zhang N, Cao Q, Shi X, Wang C, Rui X, Ding J, Zhao C, Zhang J, Ling X, Li H, Guan Y, Meng Q, Huo R. NLRP7 participates in the human subcortical maternal complex and its variants cause female infertility characterized by early embryo arrest. J Mol Med (Berl) 2023:10.1007/s00109-023-02322-7. [PMID: 37148315 DOI: 10.1007/s00109-023-02322-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 04/10/2023] [Accepted: 04/12/2023] [Indexed: 05/08/2023]
Abstract
Successful human reproduction requires normal oocyte maturation, fertilization, and early embryo development. Early embryo arrest is a common phenomenon leading to female infertility, but the genetic basis is largely unknown. NLR family pyrin domain-containing 7 (NLRP7) is a member of the NLRP subfamily. Previous studies have shown that variants of NLRP7 are one of the crucial causes of female recurrent hydatidiform mole, but whether NLRP7 variants can directly affect early embryo development is unclear. We performed whole-exome sequencing in patients who experienced early embryo arrest, and five heterozygous variants (c.251G > A, c.1258G > A, c.1441G > A, c. 2227G > A, c.2323C > T) of NLRP7 were identified in affected individuals. Plasmids of NLRP7 and subcortical maternal complex components were overexpressed in 293 T cells, and Co-IP experiments showed that NLRP7 interacted with NLRP5, TLE6, PADI6, NLRP2, KHDC3L, OOEP, and ZBED3. Injecting complementary RNAs in mouse oocytes and early embryos showed that NLRP7 variants influenced the oocyte quality and some of the variants significantly affected early embryo development. These findings contribute to our understanding of the role of NLRP7 in human early embryo development and provide a new genetic marker for clinical early embryo arrest patients. KEY MESSAGES: Five heterozygous variants of NLRP7 (c.1441G > A; 2227G > A; c.251G > A; c.1258G > A; c.2323C > T) were identified in five infertile patients who experienced early embryo arrest. NLRP7 is a component of human subcortical maternal complex. NLRP7 variants lead to poor quality of oocytes and early embryo development arrest. This study provides a new genetic marker for clinical early embryo arrest patients.
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Affiliation(s)
- Jian Han
- State Key Laboratory of Reproductive Medicine and Offspring Health, Department of Histology and Embryology, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Gusu School, Nanjing Medical University, Nanjing, China
| | - Nana Zhang
- Center for Reproductive Medicine, The Third Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Qiqi Cao
- State Key Laboratory of Reproductive Medicine and Offspring Health, Department of Histology and Embryology, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Gusu School, Nanjing Medical University, Nanjing, China
| | - Xiaodan Shi
- Department of Reproductive Medicine, Women's Hospital of Nanjing Medical University, Nanjing Maternity and Child Health Care Hospital, Nanjing, China
| | - Congjing Wang
- State Key Laboratory of Reproductive Medicine and Offspring Health, Department of Histology and Embryology, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Gusu School, Nanjing Medical University, Nanjing, China
| | - Ximan Rui
- State Key Laboratory of Reproductive Medicine and Offspring Health, Department of Histology and Embryology, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Gusu School, Nanjing Medical University, Nanjing, China
| | - Jie Ding
- State Key Laboratory of Reproductive Medicine and Offspring Health, Department of Histology and Embryology, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Gusu School, Nanjing Medical University, Nanjing, China
- Reproductive Genetic Center, Suzhou Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Suzhou, China
| | - Chun Zhao
- Department of Reproductive Medicine, Women's Hospital of Nanjing Medical University, Nanjing Maternity and Child Health Care Hospital, Nanjing, China
| | - Junqiang Zhang
- Department of Reproductive Medicine, Women's Hospital of Nanjing Medical University, Nanjing Maternity and Child Health Care Hospital, Nanjing, China
| | - Xiufeng Ling
- Department of Reproductive Medicine, Women's Hospital of Nanjing Medical University, Nanjing Maternity and Child Health Care Hospital, Nanjing, China
| | - Hong Li
- State Key Laboratory of Reproductive Medicine and Offspring Health, Department of Histology and Embryology, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Gusu School, Nanjing Medical University, Nanjing, China
- Reproductive Genetic Center, Suzhou Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Suzhou, China
| | - Yichun Guan
- Center for Reproductive Medicine, The Third Affiliated Hospital of Zhengzhou University, Zhengzhou, China.
| | - Qingxia Meng
- State Key Laboratory of Reproductive Medicine and Offspring Health, Department of Histology and Embryology, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Gusu School, Nanjing Medical University, Nanjing, China.
- Reproductive Genetic Center, Suzhou Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Suzhou, China.
| | - Ran Huo
- State Key Laboratory of Reproductive Medicine and Offspring Health, Department of Histology and Embryology, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Gusu School, Nanjing Medical University, Nanjing, China.
- Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing, China.
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16
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Ermisch AF, Bidne KL, Kurz SG, Bochantin KA, Wood JR. Ovarian inflammation mediated by Toll-like receptor 4 increased transcripts of maternal effect genes and decreased embryo development†. Biol Reprod 2023; 108:423-436. [PMID: 36461933 DOI: 10.1093/biolre/ioac212] [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: 05/23/2022] [Revised: 11/03/2022] [Accepted: 11/25/2022] [Indexed: 12/07/2022] Open
Abstract
Obese women are subfertile and have reduced assisted reproduction success, which may be due to reduced oocyte competence. We hypothesize that consumption of a high-fat/high-sugar diet induces ovarian inflammation, which is a primary contributor to decreased oocyte quality and pre-implantation embryo development. To test this hypothesis, C57BL/6 (B6) mice with a normal inflammatory response and C3H/HeJ (C3H) mice with a dampened inflammatory response due to dysfunctional Toll-like receptor 4 were fed either normal chow or high-fat/high-sugar diet. In both B6 and C3H females, high-fat/high-sugar diet induced excessive adiposity and hyperglycemia compared to normal chow-fed counterparts. Conversely, ovarian CD68 levels and oocyte expression of oxidative stress markers were increased when collected from B6 high-fat/high-sugar but not C3H high-fat/high-sugar mice. Following in vitro fertilization of in vivo matured oocytes, blastocyst development was decreased in B6-high-fat/high-sugar but not C3H high-fat/high-sugar mice. Expression of cumulus cell markers of oocyte quality were altered in both B6 high-fat/high-sugar and C3H high-fat/high-sugar. However, there were no diet-dependent differences in spindle abnormalities in either B6 or C3H mice, suggesting potential defects in cytoplasmic maturation. Indeed, there were significant increases in the abundance of maternal effect gene mRNAs in oocytes from only B6 high-fat/high-sugar mice. These differentially expressed genes encode proteins of the subcortical maternal complex and associated with mRNA metabolism and epigenetic modifications. These genes regulate maternal mRNA degradation at oocyte maturation, mRNA clearance at the zygotic genome activation, and methylation of imprinted genes suggesting a mechanism by which inflammation induced oxidative stress impairs embryo development.
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Affiliation(s)
- Alison F Ermisch
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE, USA
| | - Katie L Bidne
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE, USA
| | - Scott G Kurz
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE, USA
| | - Kerri A Bochantin
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE, USA
| | - Jennifer R Wood
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE, USA
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17
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Dang Y, Zhu L, Yuan P, Liu Q, Guo Q, Chen X, Gao S, Liu X, Ji S, Yuan Y, Lian Y, Li R, Yan L, Wong CCL, Qiao J. Functional profiling of stage-specific proteome and translational transition across human pre-implantation embryo development at a single-cell resolution. Cell Discov 2023; 9:10. [PMID: 36693841 PMCID: PMC9873803 DOI: 10.1038/s41421-022-00491-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Accepted: 11/03/2022] [Indexed: 01/25/2023] Open
Affiliation(s)
- Yujiao Dang
- grid.11135.370000 0001 2256 9319Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Center for Precision Medicine Multi-Omics Research, Third Hospital, Peking University, Beijing, China ,grid.411642.40000 0004 0605 3760National Clinical Research Center for Obstetrics and Gynecology, Peking University Third Hospital, Beijing, China ,grid.419897.a0000 0004 0369 313XKey Laboratory of Assisted Reproduction (Peking University), Ministry of Education, Beijing, China ,grid.411642.40000 0004 0605 3760Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproductive Technology, Beijing, China
| | - Liu Zhu
- grid.11135.370000 0001 2256 9319Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Center for Precision Medicine Multi-Omics Research, Third Hospital, Peking University, Beijing, China
| | - Peng Yuan
- grid.11135.370000 0001 2256 9319Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Center for Precision Medicine Multi-Omics Research, Third Hospital, Peking University, Beijing, China ,grid.411642.40000 0004 0605 3760National Clinical Research Center for Obstetrics and Gynecology, Peking University Third Hospital, Beijing, China ,grid.419897.a0000 0004 0369 313XKey Laboratory of Assisted Reproduction (Peking University), Ministry of Education, Beijing, China ,grid.411642.40000 0004 0605 3760Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproductive Technology, Beijing, China
| | - Qiang Liu
- grid.11135.370000 0001 2256 9319Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Center for Precision Medicine Multi-Omics Research, Third Hospital, Peking University, Beijing, China ,grid.411642.40000 0004 0605 3760National Clinical Research Center for Obstetrics and Gynecology, Peking University Third Hospital, Beijing, China ,grid.419897.a0000 0004 0369 313XKey Laboratory of Assisted Reproduction (Peking University), Ministry of Education, Beijing, China ,grid.411642.40000 0004 0605 3760Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproductive Technology, Beijing, China
| | - Qianying Guo
- grid.11135.370000 0001 2256 9319Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Center for Precision Medicine Multi-Omics Research, Third Hospital, Peking University, Beijing, China ,grid.411642.40000 0004 0605 3760National Clinical Research Center for Obstetrics and Gynecology, Peking University Third Hospital, Beijing, China ,grid.419897.a0000 0004 0369 313XKey Laboratory of Assisted Reproduction (Peking University), Ministry of Education, Beijing, China ,grid.411642.40000 0004 0605 3760Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproductive Technology, Beijing, China
| | - Xi Chen
- grid.11135.370000 0001 2256 9319Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Center for Precision Medicine Multi-Omics Research, Third Hospital, Peking University, Beijing, China ,grid.411642.40000 0004 0605 3760National Clinical Research Center for Obstetrics and Gynecology, Peking University Third Hospital, Beijing, China ,grid.419897.a0000 0004 0369 313XKey Laboratory of Assisted Reproduction (Peking University), Ministry of Education, Beijing, China ,grid.411642.40000 0004 0605 3760Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproductive Technology, Beijing, China
| | - Shuaixin Gao
- grid.11135.370000 0001 2256 9319Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Center for Precision Medicine Multi-Omics Research, Third Hospital, Peking University, Beijing, China
| | - Xiao Liu
- grid.11135.370000 0001 2256 9319Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Center for Precision Medicine Multi-Omics Research, Third Hospital, Peking University, Beijing, China
| | - Shushen Ji
- grid.11135.370000 0001 2256 9319Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Center for Precision Medicine Multi-Omics Research, Third Hospital, Peking University, Beijing, China
| | - Yifeng Yuan
- grid.11135.370000 0001 2256 9319Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Center for Precision Medicine Multi-Omics Research, Third Hospital, Peking University, Beijing, China ,grid.411642.40000 0004 0605 3760National Clinical Research Center for Obstetrics and Gynecology, Peking University Third Hospital, Beijing, China
| | - Ying Lian
- grid.11135.370000 0001 2256 9319Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Center for Precision Medicine Multi-Omics Research, Third Hospital, Peking University, Beijing, China ,grid.411642.40000 0004 0605 3760National Clinical Research Center for Obstetrics and Gynecology, Peking University Third Hospital, Beijing, China
| | - Rong Li
- grid.11135.370000 0001 2256 9319Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Center for Precision Medicine Multi-Omics Research, Third Hospital, Peking University, Beijing, China ,grid.411642.40000 0004 0605 3760National Clinical Research Center for Obstetrics and Gynecology, Peking University Third Hospital, Beijing, China ,grid.419897.a0000 0004 0369 313XKey Laboratory of Assisted Reproduction (Peking University), Ministry of Education, Beijing, China ,grid.411642.40000 0004 0605 3760Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproductive Technology, Beijing, China
| | - Liying Yan
- grid.11135.370000 0001 2256 9319Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Center for Precision Medicine Multi-Omics Research, Third Hospital, Peking University, Beijing, China ,grid.411642.40000 0004 0605 3760National Clinical Research Center for Obstetrics and Gynecology, Peking University Third Hospital, Beijing, China ,grid.419897.a0000 0004 0369 313XKey Laboratory of Assisted Reproduction (Peking University), Ministry of Education, Beijing, China ,grid.411642.40000 0004 0605 3760Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproductive Technology, Beijing, China ,Research Units of Comprehensive Diagnosis and Treatment of Oocyte Maturation Arrest, Beijing, China
| | - Catherine C. L. Wong
- grid.11135.370000 0001 2256 9319Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Center for Precision Medicine Multi-Omics Research, Third Hospital, Peking University, Beijing, China ,grid.452723.50000 0004 7887 9190Peking-Tsinghua Center for Life Sciences, Beijing, China ,grid.413106.10000 0000 9889 6335Department of Medical Research Center, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science & Peking Union Medical College, Beijing, China
| | - Jie Qiao
- grid.11135.370000 0001 2256 9319Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Center for Precision Medicine Multi-Omics Research, Third Hospital, Peking University, Beijing, China ,grid.411642.40000 0004 0605 3760National Clinical Research Center for Obstetrics and Gynecology, Peking University Third Hospital, Beijing, China ,grid.419897.a0000 0004 0369 313XKey Laboratory of Assisted Reproduction (Peking University), Ministry of Education, Beijing, China ,grid.411642.40000 0004 0605 3760Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproductive Technology, Beijing, China ,Research Units of Comprehensive Diagnosis and Treatment of Oocyte Maturation Arrest, Beijing, China ,grid.452723.50000 0004 7887 9190Peking-Tsinghua Center for Life Sciences, Beijing, China
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18
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Wang W, Miyamoto Y, Chen B, Shi J, Diao F, Zheng W, Li Q, Yu L, Li L, Xu Y, Wu L, Mao X, Fu J, Li B, Yan Z, Shi R, Xue X, Mu J, Zhang Z, Wu T, Zhao L, Wang W, Zhou Z, Dong J, Li Q, Jin L, He L, Sun X, Lin G, Kuang Y, Wang L, Sang Q. Karyopherin α deficiency contributes to human preimplantation embryo arrest. J Clin Invest 2023; 133:159951. [PMID: 36647821 PMCID: PMC9843055 DOI: 10.1172/jci159951] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Accepted: 11/02/2022] [Indexed: 01/18/2023] Open
Abstract
Preimplantation embryo arrest (PREMBA) is a common cause of female infertility and recurrent failure of assisted reproductive technology. However, the genetic basis of PREMBA is largely unrevealed. Here, using whole-exome sequencing data from 606 women experiencing PREMBA compared with 2,813 controls, we performed a population and gene-based burden test and identified a candidate gene, karyopherin subunit α7 (KPNA7). In vitro studies showed that identified sequence variants reduced KPNA7 protein levels, impaired KPNA7 capacity for binding to its substrate ribosomal L1 domain-containing protein 1 (RSL1D1), and affected KPNA7 nuclear transport activity. Comparison between humans and mice suggested that mouse KPNA2, rather than mouse KPNA7, acts as an essential karyopherin in embryonic development. Kpna2-/- female mice showed embryo arrest due to zygotic genome activation defects, recapitulating the phenotype of human PREMBA. In addition, female mice with an oocyte-specific knockout of Rsl1d1 recapitulated the phenotype of Kpna2-/- mice, demonstrating the vital role of substrate RSL1D1. Finally, complementary RNA (cRNA) microinjection of human KPNA7, but not mouse Kpna7, was able to rescue the embryo arrest phenotype in Kpna2-/- mice, suggesting mouse KPNA2 might be a homologue of human KPNA7. Our findings uncovered a mechanistic understanding for the pathogenesis of PREMBA, which acts by impairing nuclear protein transport, and provide a diagnostic marker for PREMBA patients.
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Affiliation(s)
- Wenjing Wang
- Institute of Pediatrics, Children’s Hospital of Fudan University, State Key Laboratory of Genetic Engineering, Institutes of Biomedical Sciences, Shanghai Key Laboratory of Medical Epigenetics, Fudan University, Shanghai, China
| | - Yoichi Miyamoto
- Laboratory of Nuclear Transport Dynamics, National Institutes of Biomedical Innovation, Health and Nutrition, Osaka, Japan
| | - Biaobang Chen
- NHC Key Lab of Reproduction Regulation, Shanghai Institute for Biomedical and Pharmaceutical Technologies, Shanghai, China
| | - Juanzi Shi
- Reproductive Medicine Center, Northwest Women’s and Children’s Hospital, Xi’an, China
| | - Feiyang Diao
- Reproductive Medicine Center, Jiangsu Province Hospital, Jiangsu, China
| | - Wei Zheng
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, China
| | - Qun Li
- Institute of Pediatrics, Children’s Hospital of Fudan University, State Key Laboratory of Genetic Engineering, Institutes of Biomedical Sciences, Shanghai Key Laboratory of Medical Epigenetics, Fudan University, Shanghai, China
| | - Lan Yu
- Reproductive Medicine Center, Henan Provincial People’s Hospital, Zhengzhou, China
| | - Lin Li
- Key Laboratory of Human Reproduction and Genetics, Department of Reproductive Medicine, Nanchang Reproductive Hospital, Nanchang, China
| | - Yao Xu
- Shanghai Key Laboratory of Maternal Fetal Medicine, Clinical and Translational Research Center, Shanghai First Maternity and Infant Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Ling Wu
- Reproductive Medicine Center, Shanghai Ninth Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Xiaoyan Mao
- Reproductive Medicine Center, Shanghai Ninth Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Jing Fu
- Shanghai Ji’ai Genetics and IVF Institute, Obstetrics and Gynecology Hospital, and
| | - Bin Li
- Reproductive Medicine Center, Shanghai Ninth Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Zheng Yan
- Reproductive Medicine Center, Shanghai Ninth Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Rong Shi
- Reproductive Medicine Center, Northwest Women’s and Children’s Hospital, Xi’an, China
| | - Xia Xue
- Reproductive Medicine Center, Northwest Women’s and Children’s Hospital, Xi’an, China
| | - Jian Mu
- Institute of Pediatrics, Children’s Hospital of Fudan University, State Key Laboratory of Genetic Engineering, Institutes of Biomedical Sciences, Shanghai Key Laboratory of Medical Epigenetics, Fudan University, Shanghai, China
| | - Zhihua Zhang
- Institute of Pediatrics, Children’s Hospital of Fudan University, State Key Laboratory of Genetic Engineering, Institutes of Biomedical Sciences, Shanghai Key Laboratory of Medical Epigenetics, Fudan University, Shanghai, China
| | - Tianyu Wu
- Institute of Pediatrics, Children’s Hospital of Fudan University, State Key Laboratory of Genetic Engineering, Institutes of Biomedical Sciences, Shanghai Key Laboratory of Medical Epigenetics, Fudan University, Shanghai, China
| | - Lin Zhao
- NHC Key Lab of Reproduction Regulation, Shanghai Institute for Biomedical and Pharmaceutical Technologies, Shanghai, China
| | - Weijie Wang
- Institute of Pediatrics, Children’s Hospital of Fudan University, State Key Laboratory of Genetic Engineering, Institutes of Biomedical Sciences, Shanghai Key Laboratory of Medical Epigenetics, Fudan University, Shanghai, China
| | - Zhou Zhou
- Institute of Pediatrics, Children’s Hospital of Fudan University, State Key Laboratory of Genetic Engineering, Institutes of Biomedical Sciences, Shanghai Key Laboratory of Medical Epigenetics, Fudan University, Shanghai, China
| | - Jie Dong
- Institute of Pediatrics, Children’s Hospital of Fudan University, State Key Laboratory of Genetic Engineering, Institutes of Biomedical Sciences, Shanghai Key Laboratory of Medical Epigenetics, Fudan University, Shanghai, China
| | - Qiaoli Li
- Institute of Pediatrics, Children’s Hospital of Fudan University, State Key Laboratory of Genetic Engineering, Institutes of Biomedical Sciences, Shanghai Key Laboratory of Medical Epigenetics, Fudan University, Shanghai, China
| | - Li Jin
- State Key Laboratory of Genetic Engineering and Collaborative Innovation Center for Genetics and Development, School of Life Sciences, Fudan University, Shanghai, China
| | - Lin He
- Bio-X Center, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders, Ministry of Education, Shanghai Jiao Tong University, Shanghai, China
| | - Xiaoxi Sun
- Shanghai Ji’ai Genetics and IVF Institute, Obstetrics and Gynecology Hospital, and
| | - Ge Lin
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, China
| | - Yanping Kuang
- Reproductive Medicine Center, Shanghai Ninth Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Lei Wang
- Institute of Pediatrics, Children’s Hospital of Fudan University, State Key Laboratory of Genetic Engineering, Institutes of Biomedical Sciences, Shanghai Key Laboratory of Medical Epigenetics, Fudan University, Shanghai, China
| | - Qing Sang
- Institute of Pediatrics, Children’s Hospital of Fudan University, State Key Laboratory of Genetic Engineering, Institutes of Biomedical Sciences, Shanghai Key Laboratory of Medical Epigenetics, Fudan University, Shanghai, China
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19
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Zhang T, Liu P, Yao G, Zhang X, Cao C. A complex heterozygous mutation in PADI6 causes early embryo arrest: A case report. Front Genet 2023; 13:1104085. [PMID: 36704355 PMCID: PMC9871383 DOI: 10.3389/fgene.2022.1104085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Accepted: 12/15/2022] [Indexed: 01/12/2023] Open
Abstract
Background: The PADI6 gene is a component of the subcortical maternal effect complex (SCMC). Mutations in the PADI6 gene, which was the first gene discovered to impact the activation process of the human embryonic genome, have been shown to induce early embryo arrest. Case: A 29-year-old lady with primary infertility underwent in vitro fertilization embryo transfer (IVF-ET) for tubal reasons, who had normal hormone levels and ovarian reserve. A Progestin-Primed Ovarian Stimulation (PPOS) protocol of Ovarian stimulation with IVF was performed. The total of Gonadotropin (Gn) stimulation with u-FSH was 2100 IU, which lasted for 10 days. When three follicles measuring less than 18 mm in diameter were seen, r-hCG 250 ug and triptorelin acetate 0.2 mg were injected to trigger oocyte maturation. Nineteen oocytes (including thirteen MII oocytes) were picked up 37 h after the trigger, and seven of these were normal fertilized. Unfortunately, these many embryos were stopped at the 1- or 2-cell stage, hence this infertile patient's IVF treatment won't result in an embryo transfer. Using whole-exome sequencing, a complex heterozygous mutation in PADI6 was discovered: c. 1247T>C [p.Ile416Thr] in exon 12 of PADI6, and c. 2009_2010del [p.Glu670GlyfsTer48] in exon 17 of PADI6. Conclusion: We found a complex heterozygous mutation in the PADI6 gene (c. 1247T>C; c. 2009_2010del) that caused embryos were arrested at the 1- or 2- cell stage. The discovery in this patient adds to the evidence showing the PADI6 gene mutation causes early embryo arrest in humans.
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20
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Tong X, Jin J, Hu Z, Zhang Y, Fan HY, Zhang YL, Zhang S. Mutations in OOEP and NLRP5 identified in infertile patients with early embryonic arrest. Hum Mutat 2022; 43:1909-1920. [PMID: 35946397 PMCID: PMC10087254 DOI: 10.1002/humu.24448] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Revised: 07/27/2022] [Accepted: 08/05/2022] [Indexed: 01/25/2023]
Abstract
The subcortical maternal complex (SCMC), composed of several maternal-effect genes, is vital for the development of oocytes and early embryos. Variants of SCMC-encoding genes (NLRP2, NLRP5, TLE6, PADI6, and KHDC3L, but not OOEP and ZBED3) are associated with human oocyte maturation dysfunction, fertilization failure, and early embryonic arrest. In this study, we enrolled 118 Chinese patients who experienced recurrent preimplantation embryonic arrest during assisted reproductive technology treatments and performed whole-exome sequencing. We discovered compound heterozygous missense variants (c.110G>C and c.109C>G) in the OOEP gene in one patient who experienced recurrent preimplantation embryonic arrest. Arrested embryos from this affected patient were analyzed by single-cell RNA sequencing, which showed a downregulated transcriptome. In addition, six novel NLRP5 variants (c.971T>A, c.3341T>C, c.1575_1576delAG, c.1830_1831delGT, c.1202C>T, and c.2378T>G) were identified in four patients with arrested and severely fragmented embryos. These suspicious mutations were examined by in vitro studies in HEK293T cells. Western blot analysis and immunofluorescence experiments showed that OOEP and partial NLRP5 mutations caused decreased protein levels. Our findings first demonstrated that biallelic variants in OOEP gene could also cause human early embryonic arrest, similar to other SCMC components. We expanded the genetic mutation spectrum of SCMC genes related to early embryogenesis in humans, especially early embryonic arrest.
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Affiliation(s)
- Xiaomei Tong
- Department of Obstetrics and Gynecology, Assisted Reproduction Unit, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China.,Department of Obstetrics and Gynecology, Key Laboratory of Reproductive Dysfunction Management of Zhejiang Province, Hangzhou, China
| | - Jiamin Jin
- Department of Obstetrics and Gynecology, Assisted Reproduction Unit, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China.,Department of Obstetrics and Gynecology, Key Laboratory of Reproductive Dysfunction Management of Zhejiang Province, Hangzhou, China
| | - Zhanhong Hu
- Department of Obstetrics and Gynecology, Assisted Reproduction Unit, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China.,Department of Obstetrics and Gynecology, Key Laboratory of Reproductive Dysfunction Management of Zhejiang Province, Hangzhou, China
| | - Yingyi Zhang
- Department of Obstetrics and Gynecology, Assisted Reproduction Unit, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China.,Department of Obstetrics and Gynecology, Key Laboratory of Reproductive Dysfunction Management of Zhejiang Province, Hangzhou, China
| | - Heng-Yu Fan
- Department of Obstetrics and Gynecology, Key Laboratory of Reproductive Dysfunction Management of Zhejiang Province, Hangzhou, China.,Life Sciences Institute, Zhejiang University, Hangzhou, China
| | - Yin-Li Zhang
- Department of Obstetrics and Gynecology, Assisted Reproduction Unit, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China.,Department of Obstetrics and Gynecology, Key Laboratory of Reproductive Dysfunction Management of Zhejiang Province, Hangzhou, China
| | - Songying Zhang
- Department of Obstetrics and Gynecology, Assisted Reproduction Unit, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China.,Department of Obstetrics and Gynecology, Key Laboratory of Reproductive Dysfunction Management of Zhejiang Province, Hangzhou, China
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21
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Solovova OA, Chernykh VB. Genetics of Oocyte Maturation Defects and Early Embryo Development Arrest. Genes (Basel) 2022; 13:1920. [PMID: 36360157 PMCID: PMC9689903 DOI: 10.3390/genes13111920] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Revised: 10/18/2022] [Accepted: 10/19/2022] [Indexed: 08/08/2023] Open
Abstract
Various pathogenic factors can lead to oogenesis failure and seriously affect both female reproductive health and fertility. Genetic factors play an important role in folliculogenesis and oocyte maturation but still need to be clarified. Oocyte maturation is a well-organized complex process, regulated by a large number of genes. Pathogenic variants in these genes as well as aneuploidy, defects in mitochondrial genome, and other genetic and epigenetic factors can result in unexplained infertility, early pregnancy loss, and recurrent failures of IVF/ICSI programs due to poor ovarian response to stimulation, oocyte maturation arrest, poor gamete quality, fertilization failure, or early embryonic developmental arrest. In this paper, we review the main genes, as well as provide a description of the defects in the mitochondrial genome, associated with female infertility.
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22
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Wang X, Zhu H, He Y, Zeng J, Zhao J, Xia Q, Wu L, Yao Z, Li Y. A novel homozygous mutation in the PADI6 gene causes early embryo arrest. Reprod Health 2022; 19:190. [PMID: 36088419 PMCID: PMC9463787 DOI: 10.1186/s12978-022-01495-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Accepted: 08/30/2022] [Indexed: 11/12/2022] Open
Abstract
Background It has been proved that mutations in the PADI6 gene can cause early embryo arrest. This study describes a newly discovered mutation in PADI6 that expands the genetic spectrum of early embryo arrest. Methods Peripheral blood of a patient diagnosed with early embryo arrest was collected for whole-exome sequencing. Sanger sequencing was performed to confirm this mutation. The effects of the variant were investigated in human embryonic kidney 293T (HEK293T) cells using western blotting, real-time quantitative polymerase chain reaction, and immunofluorescence. Results A novel homozygous mutation in PADI6 was identified in the proband. The patient carried a frameshift insertion mutation c.558dupA (p.Thr187Asnfs*48), which was located in the protein arginine deiminase middle domain. The variant destroyed PADI6 protein expression and reduced PADI6 mRNA expression in HEK293T cells. Conclusions The newly identified mutation in PADI6 accounts for early embryo arrest. It expands the spectrum of genetic causes and phenotypes of infertility in humans. These findings also provide an additional possible diagnostic marker for patients with recurrent in vitro fertilization/intracytoplasmic sperm injection failure. Supplementary Information The online version contains supplementary material available at 10.1186/s12978-022-01495-7. Some infertile patients experience multiple in vitro fertilization/intracytoplasmic sperm injection (IVF/ICSI) failure owing to recurrent early embryo arrest. However, the underlying mechanisms remain largely unknown. Due to the development of whole-exome sequencing, early embryo arrest has been confirmed as a type of Mendelian disease. This study aimed to identify the genetic cause of early embryo arrest in patients and to expand the genetic spectrum. Furthermore, it can help doctors offer better suggestions to such patients and prevent patients from suffering from multiple IVF/ICSI failures.
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23
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Chen F, Ma B, Lin Y, Luo X, Xu T, Zhang Y, Chen F, Li Y, Zhang Y, Luo B, Zhang Q, Xie X. Comparative maternal protein profiling of mouse biparental and uniparental embryos. Gigascience 2022; 11:6691138. [PMID: 36056732 PMCID: PMC9440387 DOI: 10.1093/gigascience/giac084] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Revised: 06/29/2022] [Accepted: 08/01/2022] [Indexed: 12/25/2022] Open
Abstract
Background Maternal proteins have important roles during early embryonic development. However, our understanding of maternal proteins is still very limited. The integrated analysis of mouse uniparental (parthenogenetic) and biparental (fertilized) embryos at the protein level creates a protein expression landscape that can be used to explore preimplantation mouse development. Results Using label-free quantitative mass spectrometry (MS) analysis, we report on the maternal proteome of mouse parthenogenetic embryos at pronucleus, 2-cell, 4-cell, 8-cell, morula, and blastocyst stages and highlight dynamic changes in protein expression. In addition, comparison of proteomic profiles of parthenogenotes and fertilized embryos highlights the different fates of maternal proteins. Enrichment analysis uncovered a set of maternal proteins that are strongly correlated with the subcortical maternal complex, and we report that in parthenogenotes, some of these maternal proteins escape the fate of protein degradation. Moreover, we identified a new maternal factor-Fbxw24, and highlight its importance in early embryonic development. We report that Fbxw24 interacts with Ddb1-Cul4b and may regulate maternal protein degradation in mouse. Conclusions Our study provides an invaluable resource for mechanistic analysis of maternal proteins and highlights the role of the novel maternal factor Fbw24 in regulating maternal protein degradation during preimplantation embryo development.
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Affiliation(s)
- Fumei Chen
- Department of Histology and Embryology, School of Pre-Clinical Medicine, Guangxi Medical University, Nanning, Guangxi 530021, P. R. China
| | - Buguo Ma
- Department of Histology and Embryology, School of Pre-Clinical Medicine, Guangxi Medical University, Nanning, Guangxi 530021, P. R. China.,Central Laboratory, School of Pre-Clinical Medicine, Guangxi Medical University, Nanning, Guangxi 530021, P. R. China
| | - Yongda Lin
- Department of Histology and Embryology, School of Pre-Clinical Medicine, Guangxi Medical University, Nanning, Guangxi 530021, P. R. China.,Central Laboratory, School of Pre-Clinical Medicine, Guangxi Medical University, Nanning, Guangxi 530021, P. R. China
| | - Xin Luo
- Department of Histology and Embryology, School of Pre-Clinical Medicine, Guangxi Medical University, Nanning, Guangxi 530021, P. R. China
| | - Tao Xu
- Department of Histology and Embryology, School of Pre-Clinical Medicine, Guangxi Medical University, Nanning, Guangxi 530021, P. R. China
| | - Yuan Zhang
- Department of Histology and Embryology, School of Pre-Clinical Medicine, Guangxi Medical University, Nanning, Guangxi 530021, P. R. China
| | - Fang Chen
- Department of Histology and Embryology, School of Pre-Clinical Medicine, Guangxi Medical University, Nanning, Guangxi 530021, P. R. China.,Central Laboratory, School of Pre-Clinical Medicine, Guangxi Medical University, Nanning, Guangxi 530021, P. R. China
| | - Yanfei Li
- Department of Histology and Embryology, School of Pre-Clinical Medicine, Guangxi Medical University, Nanning, Guangxi 530021, P. R. China.,Central Laboratory, School of Pre-Clinical Medicine, Guangxi Medical University, Nanning, Guangxi 530021, P. R. China
| | - Yaoyao Zhang
- Department of Histology and Embryology, School of Pre-Clinical Medicine, Guangxi Medical University, Nanning, Guangxi 530021, P. R. China.,Central Laboratory, School of Pre-Clinical Medicine, Guangxi Medical University, Nanning, Guangxi 530021, P. R. China
| | - Bin Luo
- Department of Histology and Embryology, School of Pre-Clinical Medicine, Guangxi Medical University, Nanning, Guangxi 530021, P. R. China.,Central Laboratory, School of Pre-Clinical Medicine, Guangxi Medical University, Nanning, Guangxi 530021, P. R. China
| | - Qingmei Zhang
- Department of Histology and Embryology, School of Pre-Clinical Medicine, Guangxi Medical University, Nanning, Guangxi 530021, P. R. China.,Central Laboratory, School of Pre-Clinical Medicine, Guangxi Medical University, Nanning, Guangxi 530021, P. R. China
| | - Xiaoxun Xie
- Department of Histology and Embryology, School of Pre-Clinical Medicine, Guangxi Medical University, Nanning, Guangxi 530021, P. R. China.,Central Laboratory, School of Pre-Clinical Medicine, Guangxi Medical University, Nanning, Guangxi 530021, P. R. China
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24
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Fei CF, Zhou LQ. Gene mutations impede oocyte maturation, fertilization, and early embryonic development. Bioessays 2022; 44:e2200007. [PMID: 35900055 DOI: 10.1002/bies.202200007] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Revised: 07/09/2022] [Accepted: 07/11/2022] [Indexed: 12/11/2022]
Abstract
Reproductive diseases are a long-standing problem and have become more common in the world. Currently, 15% of the world's population suffers from infertility, and half of them are women. Maturation of oocytes, successful fertilization, and high-quality embryos are prerequisites for pregnancy. With the development of assisted reproductive technology and advanced genetic assays, we have found that infertility in many young female patients is caused by mutations in various developmental regulators. These pathogenic factors may result in impediment of oocyte maturation, failure of fertilization or early embryonic development arrest. In this review, we categorize these clinically-identified, mutated genetic factors by their molecular characteristics: nuclear factors (PALT2, TRIP13, WEE2, TBPL2, REC114, MEI1 and CDC20), cytoplasmic factors (TLE6, PADI6, NLRP2/5, FBXO43, MOS and BTG4), a factor unique to primates (TUBB8), cell membrane factor (PANX1), and zona pellucida factors (ZP1-3). We compared discrepancies observed in phenotypes between human and mouse models to provide clues for clinical diagnosis and treatment of related reproductive diseases.
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Affiliation(s)
- Cai-Feng Fei
- Institute of Reproductive Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Li-Quan Zhou
- Institute of Reproductive Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
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25
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Adhikari D, Lee IW, Al-Zubaidi U, Liu J, Zhang QH, Yuen WS, He L, Winstanley Y, Sesaki H, Mann JR, Robker RL, Carroll J. Depletion of oocyte dynamin-related protein 1 shows maternal-effect abnormalities in embryonic development. SCIENCE ADVANCES 2022; 8:eabl8070. [PMID: 35704569 PMCID: PMC9200162 DOI: 10.1126/sciadv.abl8070] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Eggs contain about 200,000 mitochondria that generate adenosine triphosphate and metabolites essential for oocyte development. Mitochondria also integrate metabolism and transcription via metabolites that regulate epigenetic modifiers, but there is no direct evidence linking oocyte mitochondrial function to the maternal epigenome and subsequent embryo development. Here, we have disrupted oocyte mitochondrial function via deletion of the mitochondrial fission factor Drp1. Fission-deficient oocytes exhibit a high frequency of failure in peri- and postimplantation development. This is associated with altered mitochondrial function, changes in the oocyte transcriptome and proteome, altered subcortical maternal complex, and a decrease in oocyte DNA methylation and H3K27me3. Transplanting pronuclei of fertilized Drp1 knockout oocytes to normal ooplasm fails to rescue embryonic lethality. We conclude that mitochondrial function plays a role in establishing the maternal epigenome, with serious consequences for embryo development.
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Affiliation(s)
- Deepak Adhikari
- Development and Stem Cell Program and Department of Anatomy and Developmental Biology, Monash Biomedicine Discovery Institute, Monash University, Melbourne, Victoria 3800, Australia
- Corresponding author. (D.A.); (J.C.)
| | - In-won Lee
- Development and Stem Cell Program and Department of Anatomy and Developmental Biology, Monash Biomedicine Discovery Institute, Monash University, Melbourne, Victoria 3800, Australia
| | - Usama Al-Zubaidi
- Development and Stem Cell Program and Department of Anatomy and Developmental Biology, Monash Biomedicine Discovery Institute, Monash University, Melbourne, Victoria 3800, Australia
- Applied Embryology Department, High Institute for Infertility Diagnosis and Assisted Reproductive Technologies, Al-Nahrain University, Baghdad, Iraq
| | - Jun Liu
- Development and Stem Cell Program and Department of Anatomy and Developmental Biology, Monash Biomedicine Discovery Institute, Monash University, Melbourne, Victoria 3800, Australia
| | - Qing-Hua Zhang
- Development and Stem Cell Program and Department of Anatomy and Developmental Biology, Monash Biomedicine Discovery Institute, Monash University, Melbourne, Victoria 3800, Australia
| | - Wai Shan Yuen
- Development and Stem Cell Program and Department of Anatomy and Developmental Biology, Monash Biomedicine Discovery Institute, Monash University, Melbourne, Victoria 3800, Australia
| | - Likun He
- Development and Stem Cell Program and Department of Anatomy and Developmental Biology, Monash Biomedicine Discovery Institute, Monash University, Melbourne, Victoria 3800, Australia
| | - Yasmyn Winstanley
- School of Biomedicine, Discipline of Reproduction and Development, Robinson Research Institute, The University of Adelaide, South Australia 5005, Australia
| | - Hiromi Sesaki
- Department of Cell Biology, Johns Hopkins University School of Medicine, 725 N. Wolfe Street, 109 Hunterian, Baltimore, MD 21205, USA
| | - Jeffrey R. Mann
- Development and Stem Cell Program and Department of Anatomy and Developmental Biology, Monash Biomedicine Discovery Institute, Monash University, Melbourne, Victoria 3800, Australia
| | - Rebecca L. Robker
- Development and Stem Cell Program and Department of Anatomy and Developmental Biology, Monash Biomedicine Discovery Institute, Monash University, Melbourne, Victoria 3800, Australia
- School of Pediatrics and Reproductive Health, Robinson Research Institute, The University of Adelaide, Adelaide, South Australia 5005, Australia
| | - John Carroll
- Development and Stem Cell Program and Department of Anatomy and Developmental Biology, Monash Biomedicine Discovery Institute, Monash University, Melbourne, Victoria 3800, Australia
- Corresponding author. (D.A.); (J.C.)
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Capalbo A, Buonaiuto S, Figliuzzi M, Damaggio G, Girardi L, Caroselli S, Poli M, Patassini C, Cetinkaya M, Yuksel B, Azad A, Grøndahl M, Hoffmann E, Simón C, Colonna V, Kahraman S. A standardized approach for case selection and genomic data analysis of maternal exomes for the diagnosis of oocyte maturation and early embryonic developmental arrest in IVF. Reprod Biomed Online 2022; 45:508-518. [DOI: 10.1016/j.rbmo.2022.05.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2022] [Accepted: 05/17/2022] [Indexed: 11/15/2022]
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27
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Xu Y, Wang R, Pang Z, Wei Z, Sun L, Li S, Wang G, Liu Y, Zhou Y, Ye H, Jin L, Xue S. Novel Homozygous PADI6 Variants in Infertile Females with Early Embryonic Arrest. Front Cell Dev Biol 2022; 10:819667. [PMID: 35433708 PMCID: PMC9010549 DOI: 10.3389/fcell.2022.819667] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Accepted: 02/16/2022] [Indexed: 11/13/2022] Open
Abstract
Early embryonic arrest denotes premature termination of development in preimplantation embryos, which is one of the major phenotypes of recurrent assisted reproduction failure. Padi6 is proven to be a member of the subcortical maternal complex (SCMC) in mice, which is essential in oocyte maturation and embryogenesis. We and other groups previously found that biallelic mutations in PADI6 caused female infertility manifesting as early embryonic arrest. In this study, we identified two novel homozygous variants (p.Cys163Arg, and p. Trp475*) of PADI6 in two infertile patients from a cohort of 75 females with the phenotype of early embryonic arrest. An in vitro expression study indicated severe decrease of PADI6, which might destruct the stability of SCMC. Our study expands the mutational spectrum of PADI6 and further supports the causality between PADI6 mutations and female infertility.
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Affiliation(s)
- Yao Xu
- Shanghai Key Laboratory of Maternal Fetal Medicine, Clinical and Translational Research Center, Shanghai First Maternity and Infant Hospital, School of Medicine, Tongji University, Shanghai, China
- *Correspondence: Yao Xu, ; Liping Jin, ; Songguo Xue,
| | - Rongxiang Wang
- Reproductive Medicine Center, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Zhi Pang
- Liver Cancer Institute, Zhongshan Hospital, Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, Fudan University, Shanghai, China
| | - Zhiyun Wei
- Shanghai Key Laboratory of Maternal Fetal Medicine, Clinical and Translational Research Center, Shanghai First Maternity and Infant Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Lihua Sun
- Reproductive Medicine Center, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Sa Li
- Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, University of Chinese Academy of Sciences, Beijing, China
| | - Guanghua Wang
- Shanghai Key Laboratory of Maternal Fetal Medicine, Clinical and Translational Research Center, Shanghai First Maternity and Infant Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Yu Liu
- Reproductive Medicine Center, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Yiwen Zhou
- Reproductive Medicine Center, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Hongjuan Ye
- Reproductive Medicine Center, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Liping Jin
- Shanghai Key Laboratory of Maternal Fetal Medicine, Clinical and Translational Research Center, Shanghai First Maternity and Infant Hospital, School of Medicine, Tongji University, Shanghai, China
- *Correspondence: Yao Xu, ; Liping Jin, ; Songguo Xue,
| | - Songguo Xue
- Reproductive Medicine Center, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai, China
- *Correspondence: Yao Xu, ; Liping Jin, ; Songguo Xue,
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28
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Eggermann T, Yapici E, Bliek J, Pereda A, Begemann M, Russo S, Tannorella P, Calzari L, de Nanclares GP, Lombardi P, Temple IK, Mackay D, Riccio A, Kagami M, Ogata T, Lapunzina P, Monk D, Maher ER, Tümer Z. Trans-acting genetic variants causing multilocus imprinting disturbance (MLID): common mechanisms and consequences. Clin Epigenetics 2022; 14:41. [PMID: 35296332 PMCID: PMC8928698 DOI: 10.1186/s13148-022-01259-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Accepted: 02/28/2022] [Indexed: 01/13/2023] Open
Abstract
BACKGROUND Imprinting disorders are a group of congenital diseases which are characterized by molecular alterations affecting differentially methylated regions (DMRs). To date, at least twelve imprinting disorders have been defined with overlapping but variable clinical features including growth and metabolic disturbances, cognitive dysfunction, abdominal wall defects and asymmetry. In general, a single specific DMR is affected in an individual with a given imprinting disorder, but there are a growing number of reports on individuals with so-called multilocus imprinting disturbances (MLID), where aberrant imprinting marks (most commonly loss of methylation) occur at multiple DMRs. However, as the literature is fragmented, we reviewed the molecular and clinical data of 55 previously reported or newly identified MLID families with putative pathogenic variants in maternal effect genes (NLRP2, NLRP5, NLRP7, KHDC3L, OOEP, PADI6) and in other candidate genes (ZFP57, ARID4A, ZAR1, UHRF1, ZNF445). RESULTS In 55 families, a total of 68 different candidate pathogenic variants were identified (7 in NLRP2, 16 in NLRP5, 7 in NLRP7, 17 in PADI6, 15 in ZFP57, and a single variant in each of the genes ARID4A, ZAR1, OOEP, UHRF1, KHDC3L and ZNF445). Clinical diagnoses of affected offspring included Beckwith-Wiedemann syndrome spectrum, Silver-Russell syndrome spectrum, transient neonatal diabetes mellitus, or they were suspected for an imprinting disorder (undiagnosed). Some families had recurrent pregnancy loss. CONCLUSIONS Genomic maternal effect and foetal variants causing MLID allow insights into the mechanisms behind the imprinting cycle of life, and the spatial and temporal function of the different factors involved in oocyte maturation and early development. Further basic research together with identification of new MLID families will enable a better understanding of the link between the different reproductive issues such as recurrent miscarriages and preeclampsia in maternal effect variant carriers/families and aneuploidy and the MLID observed in the offsprings. The current knowledge can already be employed in reproductive and genetic counselling in specific situations.
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Affiliation(s)
- Thomas Eggermann
- Institute of Human Genetics, Medical Faculty, RWTH Aachen University, Pauwelsstr. 30, 52074, Aachen, Germany.
| | - Elzem Yapici
- grid.1957.a0000 0001 0728 696XInstitute of Human Genetics, Medical Faculty, RWTH Aachen University, Pauwelsstr. 30, 52074 Aachen, Germany
| | - Jet Bliek
- grid.509540.d0000 0004 6880 3010Department of Human Genetics, Laboratory for Genome Diagnostics, Amsterdam UMC, Amsterdam, Netherlands
| | - Arrate Pereda
- grid.468902.10000 0004 1773 0974Molecular (Epi)Genetics Laboratory, Bioaraba Health Research Institute, Hospital Universitario Araba-Txagorritxu, Vitoria-Gasteiz, Alava Spain
| | - Matthias Begemann
- grid.1957.a0000 0001 0728 696XInstitute of Human Genetics, Medical Faculty, RWTH Aachen University, Pauwelsstr. 30, 52074 Aachen, Germany
| | - Silvia Russo
- grid.418224.90000 0004 1757 9530Research Laboratory of Medical Cytogenetics and Molecular Genetics, Istituto Auxologico Italiano, IRCCS, Milan, Italy
| | - Pierpaola Tannorella
- grid.418224.90000 0004 1757 9530Research Laboratory of Medical Cytogenetics and Molecular Genetics, Istituto Auxologico Italiano, IRCCS, Milan, Italy
| | - Luciano Calzari
- grid.418224.90000 0004 1757 9530Research Laboratory of Medical Cytogenetics and Molecular Genetics, Istituto Auxologico Italiano, IRCCS, Milan, Italy
| | - Guiomar Perez de Nanclares
- grid.468902.10000 0004 1773 0974Molecular (Epi)Genetics Laboratory, Bioaraba Health Research Institute, Hospital Universitario Araba-Txagorritxu, Vitoria-Gasteiz, Alava Spain
| | - Paola Lombardi
- grid.509540.d0000 0004 6880 3010Department of Human Genetics, Laboratory for Genome Diagnostics, Amsterdam UMC, Amsterdam, Netherlands
| | - I. Karen Temple
- grid.123047.30000000103590315Wessex Clinical Genetics Service, University Hospital Southampton, Southampton, UK ,grid.430506.40000 0004 0465 4079Wessex Clinical Genetics Service, University Hospital Southampton NHS Foundation Trust, Southampton, UK
| | - Deborah Mackay
- grid.430506.40000 0004 0465 4079Wessex Clinical Genetics Service, University Hospital Southampton NHS Foundation Trust, Southampton, UK
| | - Andrea Riccio
- grid.9841.40000 0001 2200 8888Department of Environmental, Biological and Pharmaceutical Sciences and Technologies, University of Campania ‘Luigi Vanvitelli’, Caserta, Italy ,grid.419869.b0000 0004 1758 2860Institute of Genetics and Biophysics ‘Adriano Buzzati–Traverso’ CNR, Naples, Italy
| | - Masayo Kagami
- grid.63906.3a0000 0004 0377 2305Department of Molecular Endocrinology, National Research Institute for Child Health and Development, Ohkura, Setagayaku, Tokyo, Japan
| | - Tsutomu Ogata
- grid.413553.50000 0004 1772 534XDepartment of Pediatrics, Hamamatsu Medical Center, Hamamatsu, Japan ,grid.505613.40000 0000 8937 6696Department of Biochemistry, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Pablo Lapunzina
- grid.81821.320000 0000 8970 9163CIBERER-ISCIII and INGEMM, Institute of Medical and Molecular Genetics, Hospital Universitario La Paz, Madrid, Spain ,ERN-Ithaca, European Reference Networks, Madrid, Spain
| | - David Monk
- grid.8273.e0000 0001 1092 7967School of Biological Sciences, University of East Anglia, Norwich, UK
| | - Eamonn R. Maher
- grid.24029.3d0000 0004 0383 8386Department of Medical Genetics, University of Cambridge and Cambridge University Hospitals NHS Foundation Trust, Cambridge, CB2 0QQ UK ,grid.24029.3d0000 0004 0383 8386Cambridge University Hospitals NHS Foundation Trust, Cambridge, CB2 0QQ UK
| | - Zeynep Tümer
- grid.475435.4Department of Clinical Genetics, Kennedy Center, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark ,grid.5254.60000 0001 0674 042XDepartment of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
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29
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Picchetta L, Caroselli S, Figliuzzi M, Cogo F, Zambon P, Costa M, Pergher I, Patassini C, Cortellessa F, Zuccarello D, Poli M, Capalbo A. Molecular tools for the genomic assessment of oocyte’s reproductive competence. J Assist Reprod Genet 2022; 39:847-860. [PMID: 35124783 PMCID: PMC9050973 DOI: 10.1007/s10815-022-02411-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Accepted: 01/24/2022] [Indexed: 12/15/2022] Open
Abstract
The most important factor associated with oocytes' developmental competence has been widely identified as the presence of chromosomal abnormalities. However, growing application of genome-wide sequencing (GS) in population diagnostics has enabled the identification of multifactorial genetic predispositions to sub-lethal pathologies, including those affecting IVF outcomes and reproductive fitness. Indeed, GS analysis in families with history of isolated infertility has recently led to the discovery of new genes and variants involved in specific human infertility endophenotypes that impact the availability and the functionality of female gametes by altering unique mechanisms necessary for oocyte maturation and early embryo development. Ongoing advancements in analytical and bioinformatic pipelines for the study of the genetic determinants of oocyte competence may provide the biological evidence required not only for improving the diagnosis of isolated female infertility but also for the development of novel preventive and therapeutic approaches for reproductive failure. Here, we provide an updated discussion and review of the progresses made in preconception genomic medicine in the identification of genetic factors associated with oocyte availability, function, and competence.
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30
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Zhang C, Wang M, Li Y, Zhang Y. Profiling and functional characterization of maternal mRNA translation during mouse maternal-to-zygotic transition. SCIENCE ADVANCES 2022; 8:eabj3967. [PMID: 35108058 PMCID: PMC8809684 DOI: 10.1126/sciadv.abj3967] [Citation(s) in RCA: 42] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Translational regulation plays an important role in gene expression and function. Although the transcriptional dynamics of mouse preimplantation embryos have been well characterized, the global mRNA translation landscape and the master regulators of zygotic genome activation (ZGA) remain unknown. Here, by developing and applying a low-input ribosome profiling (LiRibo-seq) technique, we profiled the mRNA translation landscape in mouse preimplantation embryos and revealed the translational dynamics during mouse preimplantation development. We identified a marked translational transition from MII oocytes to zygotes and demonstrated that active translation of maternal mRNAs is essential for maternal-to-zygotic transition (MZT). We further showed that two maternal factors, Smarcd2 and Cyclin T2, whose translation is activated in zygotes, are required for chromatin reprogramming and ZGA, respectively. Our study thus not only filled in a knowledge gap on translational regulation during mammalian preimplantation development but also revealed insights into the critical function of maternal mRNA translation in MZT.
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Affiliation(s)
- Chunxia Zhang
- Howard Hughes Medical Institute, Boston Children’s Hospital, Boston, MA 02115, USA
- Program in Cellular and Molecular Medicine, Boston Children’s Hospital, Boston, MA 02115, USA
| | - Meng Wang
- Howard Hughes Medical Institute, Boston Children’s Hospital, Boston, MA 02115, USA
- Program in Cellular and Molecular Medicine, Boston Children’s Hospital, Boston, MA 02115, USA
| | - Yisi Li
- Howard Hughes Medical Institute, Boston Children’s Hospital, Boston, MA 02115, USA
- Program in Cellular and Molecular Medicine, Boston Children’s Hospital, Boston, MA 02115, USA
- Department of Automation, Tsinghua University, Beijing 100084, China
| | - Yi Zhang
- Howard Hughes Medical Institute, Boston Children’s Hospital, Boston, MA 02115, USA
- Program in Cellular and Molecular Medicine, Boston Children’s Hospital, Boston, MA 02115, USA
- Department of Genetics, Harvard Medical School, Boston, MA 02115, USA
- Harvard Stem Cell Institute, Boston, MA 02115, USA
- Corresponding author.
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31
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Huang X, Sun Q, Chen D, Yang W, Zhang J, Liu R, Zhang P, Huang L, Zhang M, Fu Q. Nlrp5 and Tle6 expression patterns in buffalo oocytes and preimplantation embryos. Reprod Domest Anim 2022; 57:481-488. [PMID: 35044003 DOI: 10.1111/rda.14084] [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: 11/26/2021] [Accepted: 01/14/2022] [Indexed: 11/30/2022]
Abstract
Maternal-effect genes (MEGs) accumulate in oocytes during oogenesis and mediate the preimplantation embryo developmental program until activation of the zygote genome. Nlrp5 and Tle6 are required for normal preimplantation and embryonic development. However, the precise function of these MEGs in buffalo (Bubalus bubalis) remains to be elucidated. The aim of this study was to characterize Nlrp5 and Tle6 sequences, and analyze their mRNA and protein expression patterns in somatic tissues, oocytes, and preimplantation embryos of buffalo. The coding sequences of each gene were successfully cloned and characterized. Real-time quantitative reverse transcription PCR results revealed an absence of Nlrp5 or Tle6 transcripts in somatic tissues, with the exception of ovary. Expression levels of Nlrp5 and Tle6 in oocytes increased from the germinal vesicle stage to metaphase II stage, and then gradually decreased during morula and blastocyst stages. Protein expression patterns were confirmed by immunofluorescence analysis. This study lays a foundation for further validation of the function of MEGs in buffalo.
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Affiliation(s)
- Xingchen Huang
- State Key Laboratory of Subtropical Agro-Bioresource Conservation and Utilization, Nanning, Guangxi Province, P. R. China, 530004
| | - Qinqiang Sun
- State Key Laboratory of Subtropical Agro-Bioresource Conservation and Utilization, Nanning, Guangxi Province, P. R. China, 530004
| | - Dongrong Chen
- State Key Laboratory of Subtropical Agro-Bioresource Conservation and Utilization, Nanning, Guangxi Province, P. R. China, 530004
| | - Weihan Yang
- State Key Laboratory of Subtropical Agro-Bioresource Conservation and Utilization, Nanning, Guangxi Province, P. R. China, 530004
| | - Junjun Zhang
- State Key Laboratory of Subtropical Agro-Bioresource Conservation and Utilization, Nanning, Guangxi Province, P. R. China, 530004
| | - Runfeng Liu
- State Key Laboratory of Subtropical Agro-Bioresource Conservation and Utilization, Nanning, Guangxi Province, P. R. China, 530004
| | - Pengfei Zhang
- State Key Laboratory of Subtropical Agro-Bioresource Conservation and Utilization, Nanning, Guangxi Province, P. R. China, 530004
| | - Liangfeng Huang
- State Key Laboratory of Subtropical Agro-Bioresource Conservation and Utilization, Nanning, Guangxi Province, P. R. China, 530004
| | - Ming Zhang
- State Key Laboratory of Subtropical Agro-Bioresource Conservation and Utilization, Nanning, Guangxi Province, P. R. China, 530004
| | - Qiang Fu
- State Key Laboratory of Subtropical Agro-Bioresource Conservation and Utilization, Nanning, Guangxi Province, P. R. China, 530004
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32
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Abstract
Maternal effect genes (MEGs) encode factors (e.g., RNA) that are present in the oocyte and required for early embryonic development. Hence, while these genes and gene products are of maternal origin, their phenotypic consequences result from effects on the embryo. The first mammalian MEGs were identified in the mouse in 2000 and were associated with early embryonic loss in the offspring of homozygous null females. In humans, the first MEG was identified in 2006, in women who had experienced a range of adverse reproductive outcomes, including hydatidiform moles, spontaneous abortions, and stillbirths. Over 80 mammalian MEGs have subsequently been identified, including several that have been associated with phenotypes in humans. In general, pathogenic variants in MEGs or the absence of MEG products are associated with a spectrum of adverse outcomes, which in humans range from zygotic cleavage failure to offspring with multi-locus imprinting disorders. Although less established, there is also evidence that MEGs are associated with structural birth defects (e.g., craniofacial malformations, congenital heart defects). This review provides an updated summary of mammalian MEGs reported in the literature through early 2021, as well as an overview of the evidence for a link between MEGs and structural birth defects.
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33
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Novel biallelic mutations in PADI6 in patients with early embryonic arrest. J Hum Genet 2022; 67:285-293. [PMID: 34987164 DOI: 10.1038/s10038-021-00998-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 11/02/2021] [Accepted: 11/21/2021] [Indexed: 01/08/2023]
Abstract
Peptidyl arginine deiminase, type VI (PADI6) is a member of the subcortical maternal complex (SCMC), which plays vital roles in mammalian embryogenesis. Most mutations in SCMC members have been reported to cause human embryonic arrest, and a total of 15 mutations in PADI6 have been shown to be responsible for early embryonic arrest according to previous studies. However, the genetic factors behind this phenotype remain to be understood in further detail. Here, we identified 13 novel mutations and 4 previously reported mutations of PADI6 in 14 patients who were diagnosed with abnormal embryonic development caused by early arrest, embryonic fragmentation, and recurrent implantation failure. Most of the mutations were predicted by in silico analysis to be deleterious or damaging to the function of PADI6. In addition, the total and East Asian population frequencies of the mutations were low or absent in the gnomAD database. Our study expands the mutational spectrum in PADI6 and will provide precise targets for genetic counseling in the future.
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34
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Sazhenova EA, Nikitina TV, Vasilyev SA, Tolmacheva EN, Vasilyeva OY, Markov AV, Yuryev SY, Skryabin NA, Zarubin AA, Kolesnikov NA, Stepanov VA, Lebedev IN. NLRP7 variants in spontaneous abortions with multilocus imprinting disturbances from women with recurrent pregnancy loss. J Assist Reprod Genet 2021; 38:2893-2908. [PMID: 34554362 PMCID: PMC8608992 DOI: 10.1007/s10815-021-02312-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Accepted: 09/02/2021] [Indexed: 11/25/2022] Open
Abstract
PURPOSE Comparative analysis of multilocus imprinting disturbances (MLIDs) in miscarriages from women with sporadic (SPL) and recurrent pregnancy loss (RPL) and identification of variants in the imprinting control gene NLRP7 that may lead to MLIDs. METHODS Chorionic cytotrophoblast and extraembryonic mesoderm samples from first-trimester miscarriages were evaluated in 120 women with RPL and 134 women with SPL; 100 induced abortions were analyzed as a control group. All miscarriages had a normal karyotype. Epimutations in 7 imprinted genes were detected using methyl-specific PCR and confirmed with DNA pyrosequencing. Sequencing of all 13 exons and adjusted intron regions of the NLRP7 gene was performed. RESULTS Epimutations in imprinted genes were more frequently detected (p < 0.01) in the placental tissues of miscarriages from women with RPL (7.1%) than in those of women with SPL (2.7%). The predominant epimutation was postzygotic hypomethylation of maternal alleles of imprinted genes (RPL, 5.0%; SPL, 2.1%; p < 0.01). The frequency of MLID was higher among miscarriages from women with RPL than among miscarriages from women with SPL (1.7% and 0.4%, respectively, p < 0.01). Variants in NLRP7 were detected only in miscarriages from women with RPL. An analysis of the parental origin of NLRP7 variants revealed heterozygous carriers in families with RPL who exhibited spontaneous abortions with MLIDs and compound heterozygosity for NLRP7 variants. CONCLUSION RPL is associated with NLRP7 variants that lead to germinal and postzygotic MLIDs that are incompatible with normal embryo development. TRIAL REGISTRATION Not applicable.
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Affiliation(s)
- Elena A Sazhenova
- Research Institute of Medical Genetics, Tomsk National Research Medical Center of the Russian Academy of Sciences, Ushaika str., 10, Tomsk, Russia.
| | - Tatyana V Nikitina
- Research Institute of Medical Genetics, Tomsk National Research Medical Center of the Russian Academy of Sciences, Ushaika str., 10, Tomsk, Russia
| | - Stanislav A Vasilyev
- Research Institute of Medical Genetics, Tomsk National Research Medical Center of the Russian Academy of Sciences, Ushaika str., 10, Tomsk, Russia
| | - Ekaterina N Tolmacheva
- Research Institute of Medical Genetics, Tomsk National Research Medical Center of the Russian Academy of Sciences, Ushaika str., 10, Tomsk, Russia
| | - Oksana Yu Vasilyeva
- Research Institute of Medical Genetics, Tomsk National Research Medical Center of the Russian Academy of Sciences, Ushaika str., 10, Tomsk, Russia
| | - Anton V Markov
- Research Institute of Medical Genetics, Tomsk National Research Medical Center of the Russian Academy of Sciences, Ushaika str., 10, Tomsk, Russia
| | | | - Nikolay A Skryabin
- Research Institute of Medical Genetics, Tomsk National Research Medical Center of the Russian Academy of Sciences, Ushaika str., 10, Tomsk, Russia
| | - Alexey A Zarubin
- Research Institute of Medical Genetics, Tomsk National Research Medical Center of the Russian Academy of Sciences, Ushaika str., 10, Tomsk, Russia
| | - Nikita A Kolesnikov
- Research Institute of Medical Genetics, Tomsk National Research Medical Center of the Russian Academy of Sciences, Ushaika str., 10, Tomsk, Russia
| | - Vadim A Stepanov
- Research Institute of Medical Genetics, Tomsk National Research Medical Center of the Russian Academy of Sciences, Ushaika str., 10, Tomsk, Russia
| | - Igor N Lebedev
- Research Institute of Medical Genetics, Tomsk National Research Medical Center of the Russian Academy of Sciences, Ushaika str., 10, Tomsk, Russia
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35
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Zheng W, Sha QQ, Hu H, Meng F, Zhou Q, Chen X, Zhang S, Gu Y, Yan X, Zhao L, Zong Y, Hu L, Gong F, Lu G, Fan HY, Lin G. Biallelic variants in ZFP36L2 cause female infertility characterised by recurrent preimplantation embryo arrest. J Med Genet 2021; 59:850-857. [PMID: 34611029 DOI: 10.1136/jmedgenet-2021-107933] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Accepted: 09/12/2021] [Indexed: 12/16/2022]
Abstract
BACKGROUND Recurrent preimplantation embryo developmental arrest (RPEA) is the most common cause of assisted reproductive technology treatment failure associated with identified genetic abnormalities. Variants in known maternal genes can only account for 20%-30% of these cases. The underlying genetic causes for the other affected individuals remain unknown. METHODS Whole exome sequencing was performed for 100 independent infertile females that experienced RPEA. Functional characterisations of the identified candidate disease-causative variants were validated by Sanger sequencing, bioinformatics and in vitro functional analyses, and single-cell RNA sequencing of zygotes. RESULTS Biallelic variants in ZFP36L2 were associated with RPEA and the recurrent variant (p.Ser308_Ser310del) prevented maternal mRNA decay in zygotes and HeLa cells. CONCLUSION These findings emphasise the relevance of the relationship between maternal mRNA decay and human preimplantation embryo development and highlight a novel gene potentially responsible for RPEA, which may facilitate genetic diagnoses.
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Affiliation(s)
- Wei Zheng
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-XIANGYA, Changsha, Hunan, China.,Labortatory of Reproductive and Stem Cell Engineering, NHC Key Laboratory of Human Stem and Reproductive Engineering, Central South University, Changsha, Hunan, China
| | - Qian-Qian Sha
- Fertility Preservation Laboratory, Reproductive Medicine Center, Guangdong Second Provincial General Hospital, Guangzhou, Guangdong, China
| | - Huiling Hu
- Labortatory of Reproductive and Stem Cell Engineering, NHC Key Laboratory of Human Stem and Reproductive Engineering, Central South University, Changsha, Hunan, China
| | - Fei Meng
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-XIANGYA, Changsha, Hunan, China
| | - Qinwei Zhou
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-XIANGYA, Changsha, Hunan, China
| | - Xueqin Chen
- Labortatory of Reproductive and Stem Cell Engineering, NHC Key Laboratory of Human Stem and Reproductive Engineering, Central South University, Changsha, Hunan, China
| | - Shuoping Zhang
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-XIANGYA, Changsha, Hunan, China
| | - Yifan Gu
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-XIANGYA, Changsha, Hunan, China.,Labortatory of Reproductive and Stem Cell Engineering, NHC Key Laboratory of Human Stem and Reproductive Engineering, Central South University, Changsha, Hunan, China
| | - Xian Yan
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-XIANGYA, Changsha, Hunan, China
| | - Lei Zhao
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-XIANGYA, Changsha, Hunan, China
| | - Yurong Zong
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-XIANGYA, Changsha, Hunan, China
| | - Liang Hu
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-XIANGYA, Changsha, Hunan, China.,Labortatory of Reproductive and Stem Cell Engineering, NHC Key Laboratory of Human Stem and Reproductive Engineering, Central South University, Changsha, Hunan, China
| | - Fei Gong
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-XIANGYA, Changsha, Hunan, China.,Labortatory of Reproductive and Stem Cell Engineering, NHC Key Laboratory of Human Stem and Reproductive Engineering, Central South University, Changsha, Hunan, China
| | - Guangxiu Lu
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-XIANGYA, Changsha, Hunan, China.,Labortatory of Reproductive and Stem Cell Engineering, NHC Key Laboratory of Human Stem and Reproductive Engineering, Central South University, Changsha, Hunan, China
| | - Heng-Yu Fan
- Life Sciences Institute, Zhejiang University, Hangzhou, Zhejiang, China
| | - Ge Lin
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-XIANGYA, Changsha, Hunan, China .,Labortatory of Reproductive and Stem Cell Engineering, NHC Key Laboratory of Human Stem and Reproductive Engineering, Central South University, Changsha, Hunan, China
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36
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Wang J, Zheng W, Zhang S, Yan K, Jin M, Hu H, Ma Z, Gong F, Lu G, Ren Y, Lin L, Lin G, Hu L, Liu S. An increase of phosphatidylcholines in follicular fluid implies attenuation of embryo quality on day 3 post-fertilization. BMC Biol 2021; 19:200. [PMID: 34503495 PMCID: PMC8428131 DOI: 10.1186/s12915-021-01118-w] [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: 10/24/2020] [Accepted: 08/03/2021] [Indexed: 01/02/2023] Open
Abstract
Background Although oocyte quality is the dominant factor determining embryo quality, few studies have been conducted to evaluate embryo quality based on the metabolites related to the oocyte. With quantification of the follicular fluid (FF) metabolites, in assisted reproductive technology (ART), this study sought to evaluate the embryo or oocyte quality through an informative approach. Results An evaluation model consisting of 17 features was generated to distinguish the embryo quality on day 3 post-fertilization, and phosphatidylcholines (PCs) were the key contributors to the evaluation. The model was extended to the patients under different ages and hyperstimulations, and the features were further enriched to facilitate the evaluation of the embryo quality. The metabolites were clustered through pathway analysis, leading to a hypothesis that accumulation of arachidonic acid induced by PCs might weaken embryo quality on day 3 post-fertilization. Conclusions A discriminating model with metabolic features elicited from follicular fluid was established, which enabled the evaluation of the embryo or oocyte quality even under certain clinical conditions, and the increase of PCs in follicular fluid implies the attenuation of embryo quality on day 3 post-fertilization. Supplementary Information The online version contains supplementary material available at 10.1186/s12915-021-01118-w.
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Affiliation(s)
- Ju Wang
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China.,BGI-Shenzhen, Shenzhen, 518083, China
| | - Wei Zheng
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-XIANGYA, Changsha, 410008, China
| | - Shuoping Zhang
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-XIANGYA, Changsha, 410008, China
| | - Keqiang Yan
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China.,BGI-Shenzhen, Shenzhen, 518083, China
| | - Miao Jin
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-XIANGYA, Changsha, 410008, China
| | - Huiling Hu
- Institute of Reproductive and Stem Cell Engineering, School of Basic Medical Science, Key Laboratory of National Health and Family Planning Commission, Central South University, Changsha, 410008, Hunan, China
| | - Zhen Ma
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China.,BGI-Shenzhen, Shenzhen, 518083, China
| | - Fei Gong
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-XIANGYA, Changsha, 410008, China.,Institute of Reproductive and Stem Cell Engineering, School of Basic Medical Science, Key Laboratory of National Health and Family Planning Commission, Central South University, Changsha, 410008, Hunan, China
| | - Guangxiu Lu
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-XIANGYA, Changsha, 410008, China.,Institute of Reproductive and Stem Cell Engineering, School of Basic Medical Science, Key Laboratory of National Health and Family Planning Commission, Central South University, Changsha, 410008, Hunan, China
| | - Yan Ren
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China.,BGI-Shenzhen, Shenzhen, 518083, China
| | - Liang Lin
- BGI-Shenzhen, Shenzhen, 518083, China
| | - Ge Lin
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-XIANGYA, Changsha, 410008, China.,Institute of Reproductive and Stem Cell Engineering, School of Basic Medical Science, Key Laboratory of National Health and Family Planning Commission, Central South University, Changsha, 410008, Hunan, China
| | - Liang Hu
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-XIANGYA, Changsha, 410008, China. .,Institute of Reproductive and Stem Cell Engineering, School of Basic Medical Science, Key Laboratory of National Health and Family Planning Commission, Central South University, Changsha, 410008, Hunan, China.
| | - Siqi Liu
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China. .,BGI-Shenzhen, Shenzhen, 518083, China.
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Anvar Z, Chakchouk I, Demond H, Sharif M, Kelsey G, Van den Veyver IB. DNA Methylation Dynamics in the Female Germline and Maternal-Effect Mutations That Disrupt Genomic Imprinting. Genes (Basel) 2021; 12:genes12081214. [PMID: 34440388 PMCID: PMC8394515 DOI: 10.3390/genes12081214] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 07/30/2021] [Accepted: 08/03/2021] [Indexed: 11/16/2022] Open
Abstract
Genomic imprinting is an epigenetic marking process that results in the monoallelic expression of a subset of genes. Many of these ‘imprinted’ genes in mice and humans are involved in embryonic and extraembryonic growth and development, and some have life-long impacts on metabolism. During mammalian development, the genome undergoes waves of (re)programming of DNA methylation and other epigenetic marks. Disturbances in these events can cause imprinting disorders and compromise development. Multi-locus imprinting disturbance (MLID) is a condition by which imprinting defects touch more than one locus. Although most cases with MLID present with clinical features characteristic of one imprinting disorder. Imprinting defects also occur in ‘molar’ pregnancies-which are characterized by highly compromised embryonic development-and in other forms of reproductive compromise presenting clinically as infertility or early pregnancy loss. Pathogenic variants in some of the genes encoding proteins of the subcortical maternal complex (SCMC), a multi-protein complex in the mammalian oocyte, are responsible for a rare subgroup of moles, biparental complete hydatidiform mole (BiCHM), and other adverse reproductive outcomes which have been associated with altered imprinting status of the oocyte, embryo and/or placenta. The finding that defects in a cytoplasmic protein complex could have severe impacts on genomic methylation at critical times in gamete or early embryo development has wider implications beyond these relatively rare disorders. It signifies a potential for adverse maternal physiology, nutrition, or assisted reproduction to cause epigenetic defects at imprinted or other genes. Here, we review key milestones in DNA methylation patterning in the female germline and the embryo focusing on humans. We provide an overview of recent findings regarding DNA methylation deficits causing BiCHM, MLID, and early embryonic arrest. We also summarize identified SCMC mutations with regard to early embryonic arrest, BiCHM, and MLID.
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Affiliation(s)
- Zahra Anvar
- Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, TX 77030, USA; (Z.A.); (I.C.); (M.S.)
- Duncan Neurological Research Institute, Texas Children’s Hospital, Houston, TX 77030, USA
| | - Imen Chakchouk
- Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, TX 77030, USA; (Z.A.); (I.C.); (M.S.)
- Duncan Neurological Research Institute, Texas Children’s Hospital, Houston, TX 77030, USA
| | - Hannah Demond
- Epigenetics Programme, Babraham Institute, Cambridge CB22 3AT, UK;
| | - Momal Sharif
- Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, TX 77030, USA; (Z.A.); (I.C.); (M.S.)
- Duncan Neurological Research Institute, Texas Children’s Hospital, Houston, TX 77030, USA
| | - Gavin Kelsey
- Epigenetics Programme, Babraham Institute, Cambridge CB22 3AT, UK;
- Centre for Trophoblast Research, University of Cambridge, Cambridge CB2 3EG, UK
- Correspondence: (G.K.); (I.B.V.d.V.); Tel.: +44-1223-496332 (G.K.); +832-824-8125 (I.B.V.d.V.)
| | - Ignatia B. Van den Veyver
- Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, TX 77030, USA; (Z.A.); (I.C.); (M.S.)
- Duncan Neurological Research Institute, Texas Children’s Hospital, Houston, TX 77030, USA
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
- Correspondence: (G.K.); (I.B.V.d.V.); Tel.: +44-1223-496332 (G.K.); +832-824-8125 (I.B.V.d.V.)
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Huang B, Zhao Y, Zhou L, Gong T, Feng J, Han P, Qian J. PADI6 Regulates Trophoblast Cell Migration-Invasion Through the Hippo/YAP1 Pathway in Hydatidiform Moles. J Inflamm Res 2021; 14:3489-3500. [PMID: 34326657 PMCID: PMC8314932 DOI: 10.2147/jir.s313422] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Accepted: 06/29/2021] [Indexed: 12/25/2022] Open
Abstract
Purpose Peptidyl arginine deiminase, type VI (PADI6), a member of the subcortical maternal complex, plays an important role in oocyte growth and the development of fertilized oocytes. Human patients with PADI6 mutations can suffer from multiple reproductive deficiencies including hydatidiform moles and miscarriages. Recent studies have demonstrated that the Hippo signaling pathway plays a central role in the specification of the first cell fates and the maintenance of the human placental trophoblast epithelium. The present study aimed to verify the hypothesis that PADI6 regulates the biological functions of trophoblast cells by targeting YAP1 and to explore the mechanism by which PADI6 accomplishes this in trophoblast cells. Methods Villi from HMs and human trophoblast cell lines were used to identify the localization of PADI6 and YAP1 by immunohistochemistry and immunocytochemistry. PADI6 overexpression and knockdown were induced in human trophoblast cells. Co-immunoprecipitation was used to explore the interaction between PADI6 and YAP1. Wound healing, Transwell and EdU staining assays were used to detect migration, invasion and proliferation. Flow cytometric analysis was used to analyze the cell cycle and apoptosis. β-Tubulin and F-actin levels were determined by Western blot, quantitative real-time PCR and phalloidin staining. Results The results showed that PADI6 and YAP1 had the same expression pattern in villi and colocalized in the cytotrophoblast. An interaction between PADI6 and YAP1 was also confirmed in human trophoblast cell lines. We found that PADI6 positively regulated the expression of YAP1. Functionally, overexpression of PADI6 promoted cell cycle progression and enhanced migration, invasion, proliferation and apoptosis, whereas downregulation of PADI6 showed the opposite effects. Conclusion This study demonstrates that YAP1 is a novel target of PADI6 that serves as an important regulator of trophoblast dysfunction. The crosstalk between the Hippo/YAP1 pathway and the SCMC might be a new topic to explore to uncover the pathological mechanisms of HMs.
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Affiliation(s)
- Bo Huang
- Department of Gynecology and Obstetrics, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou City, 310003, Zhejiang Province, People's Republic of China
| | - Yating Zhao
- Department of Gynecology and Obstetrics, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou City, 310003, Zhejiang Province, People's Republic of China
| | - Lin Zhou
- Department of Gynecology and Obstetrics, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou City, 310003, Zhejiang Province, People's Republic of China
| | - Tingyu Gong
- Department of Gynecology and Obstetrics, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou City, 310003, Zhejiang Province, People's Republic of China
| | - Jiawen Feng
- Department of Gynecology and Obstetrics, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou City, 310003, Zhejiang Province, People's Republic of China
| | - Peilin Han
- Department of Gynecology and Obstetrics, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou City, 310003, Zhejiang Province, People's Republic of China
| | - Jianhua Qian
- Department of Gynecology and Obstetrics, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou City, 310003, Zhejiang Province, People's Republic of China
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Eggermann T. Maternal Effect Mutations: A Novel Cause for Human Reproductive Failure. Geburtshilfe Frauenheilkd 2021; 81:780-788. [PMID: 34294945 PMCID: PMC8288500 DOI: 10.1055/a-1396-4390] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Accepted: 02/19/2021] [Indexed: 12/12/2022] Open
Abstract
Genetic alterations significantly contribute to the aetiology of reproductive failure and comprise monogenic, chromosomal and epigenetic disturbances. The implementation of next-generation sequencing (NGS) based approaches in research and diagnostics allows the comprehensive analysis of these genetic causes, and the increasing detection rates of genetic mutations causing reproductive complications confirm the potential of the new techniques. Whereas mutations affecting the fetal genome are well known to affect pregnancies and their outcome, the contribution of alterations of the maternal genome was widely unclear. With the recent mainly NGS-based identification of maternal effect variants, a new cause of human reproductive failure has been identified. Maternal effect mutations affect the expression of subcortical maternal complex (SCMC) proteins from the maternal genome, and thereby disturb oocyte maturation and progression of the early embryo. They cause a broad range of reproductive failures and pregnancy complications, including infertility, miscarriages, hydatidiform moles, aneuploidies and imprinting disturbances in the fetus. The identification of women carrying these molecular alterations in SCMC encoding genes is therefore essential for a personalised reproductive and genetic counselling. The diagnostic application of new NGS-based assays allows the comprehensive analysis of these factors, and helps to further decipher these functional links between the factors and their disturbances. A close interdisciplinary collaboration between different disciplines is definitely required to further decipher the complex regulation of early embryo development, and to translate the basic research results into clinical practice.
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Affiliation(s)
- Thomas Eggermann
- Institute of Human Genetics, RWTH Aachen University, Aachen, Germany
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40
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Bebbere D, Albertini DF, Coticchio G, Borini A, Ledda S. The subcortical maternal complex: emerging roles and novel perspectives. Mol Hum Reprod 2021; 27:6311673. [PMID: 34191027 DOI: 10.1093/molehr/gaab043] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 05/19/2021] [Indexed: 11/13/2022] Open
Abstract
Since its recent discovery, the subcortical maternal complex (SCMC) is emerging as a maternally inherited and crucial biological structure for the initial stages of embryogenesis in mammals. Uniquely expressed in oocytes and preimplantation embryos, where it localizes to the cell subcortex, this multiprotein complex is essential for early embryo development in the mouse and is functionally conserved across mammalian species, including humans. The complex has been linked to key processes leading the transition from oocyte to embryo, including meiotic spindle formation and positioning, regulation of translation, organelle redistribution, and epigenetic reprogramming. Yet, the underlying molecular mechanisms for these diverse functions are just beginning to be understood, hindered by unresolved interplay of SCMC components and variations in early lethal phenotypes. Here we review recent advances confirming involvement of the SCMC in human infertility, revealing an unexpected relationship with offspring health. Moreover, SCMC organization is being further revealed in terms of novel components and interactions with additional cell constituents. Collectively, this evidence prompts new avenues of investigation into possible roles during the process of oogenesis and the regulation of maternal transcript turnover during the oocyte to embryo transition.
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Affiliation(s)
- Daniela Bebbere
- Department of Veterinary Medicine, University of Sassari, Sassari, Italy
| | | | | | | | - Sergio Ledda
- Department of Veterinary Medicine, University of Sassari, Sassari, Italy
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41
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Zhang M, Liu C, Chen B, Lv M, Zou H, Liu Y, Gao Y, Wang T, Xing Q, Zhu Y, Wu H, Zhang Z, Zhou P, Wei Z, He X, Xu Y, Cao Y. Identification of Novel Biallelic TLE6 Variants in Female Infertility With Preimplantation Embryonic Lethality. Front Genet 2021; 12:666136. [PMID: 34178031 PMCID: PMC8226231 DOI: 10.3389/fgene.2021.666136] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Accepted: 05/07/2021] [Indexed: 01/07/2023] Open
Abstract
Preimplantation embryonic lethality is a rare cause of primary female infertility. It has been reported that variants in the transducin-like enhancer of split 6 (TLE6) gene can lead to preimplantation embryonic lethality. However, the incidence of TLE6 variants in patients with preimplantation embryonic lethality is not fully understood. In this study, we identified four patients carrying novel biallelic TLE6 variants in a cohort of 28 patients with preimplantation embryonic lethality by whole-exome sequencing and bioinformatics analysis, accounting for 14.29% (4/28) of the cohort. Immunofluorescence showed that the TLE6 levels in oocytes from patients were much lower than in normal control oocytes, suggesting that the variants result in the lower expression of the TLE6 protein in oocytes. In addition, a retrospective analysis showed that the four patients underwent a total of nine failures of in vitro fertilization and intracytoplasmic sperm injection attempts, and one of them became pregnant on the first attempt using donated oocytes. Our study extends the genetic spectrum of female infertility caused by variants in TLE6 and further confirms previously reported findings that TLE6 plays an essential role in early embryonic development. In such case, oocyte donation may be the preferred treatment.
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Affiliation(s)
- Manyu Zhang
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, Hefei, China.,NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract Anhui Medical University, Hefei, China.,Key Laboratory of Population Health Across Life Cycle, Anhui Medical University, Ministry of Education of the People's Republic of China, Hefei, China
| | - Chunyu Liu
- Obstetrics and Gynecology Hospital, NHC Key Laboratory of Reproduction Regulation (Shanghai Institute of Planned Parenthood Research), State Key Laboratory of Genetic Engineering at School of Life Sciences, Fudan University, Shanghai, China.,Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Shanghai, China.,State Key Laboratory of Reproductive Medicine, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing, China
| | - Beili Chen
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, Hefei, China.,NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract Anhui Medical University, Hefei, China.,Key Laboratory of Population Health Across Life Cycle, Anhui Medical University, Ministry of Education of the People's Republic of China, Hefei, China
| | - Mingrong Lv
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, Hefei, China.,Anhui Province Key Laboratory of Reproductive Health and Genetics, Hefei, China.,Biopreservation and Artificial Organs, Anhui Provincial Engineering Research Center, Anhui Medical University, Hefei, China
| | - Huijuan Zou
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, Hefei, China.,Anhui Province Key Laboratory of Reproductive Health and Genetics, Hefei, China.,Biopreservation and Artificial Organs, Anhui Provincial Engineering Research Center, Anhui Medical University, Hefei, China
| | - Yajing Liu
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, Hefei, China.,Anhui Province Key Laboratory of Reproductive Health and Genetics, Hefei, China.,Biopreservation and Artificial Organs, Anhui Provincial Engineering Research Center, Anhui Medical University, Hefei, China
| | - Yang Gao
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, Hefei, China.,Anhui Province Key Laboratory of Reproductive Health and Genetics, Hefei, China.,Biopreservation and Artificial Organs, Anhui Provincial Engineering Research Center, Anhui Medical University, Hefei, China
| | - Tianjuan Wang
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, Hefei, China.,Anhui Province Key Laboratory of Reproductive Health and Genetics, Hefei, China.,Biopreservation and Artificial Organs, Anhui Provincial Engineering Research Center, Anhui Medical University, Hefei, China
| | - Qiong Xing
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, Hefei, China.,Anhui Province Key Laboratory of Reproductive Health and Genetics, Hefei, China.,Biopreservation and Artificial Organs, Anhui Provincial Engineering Research Center, Anhui Medical University, Hefei, China
| | - Yutong Zhu
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, Hefei, China.,Anhui Province Key Laboratory of Reproductive Health and Genetics, Hefei, China.,Biopreservation and Artificial Organs, Anhui Provincial Engineering Research Center, Anhui Medical University, Hefei, China
| | - Huan Wu
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, Hefei, China.,Anhui Province Key Laboratory of Reproductive Health and Genetics, Hefei, China.,Biopreservation and Artificial Organs, Anhui Provincial Engineering Research Center, Anhui Medical University, Hefei, China
| | - Zhiguo Zhang
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, Hefei, China.,Anhui Province Key Laboratory of Reproductive Health and Genetics, Hefei, China.,Biopreservation and Artificial Organs, Anhui Provincial Engineering Research Center, Anhui Medical University, Hefei, China
| | - Ping Zhou
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, Hefei, China.,Anhui Province Key Laboratory of Reproductive Health and Genetics, Hefei, China.,Biopreservation and Artificial Organs, Anhui Provincial Engineering Research Center, Anhui Medical University, Hefei, China
| | - Zhaolian Wei
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, Hefei, China.,Anhui Province Key Laboratory of Reproductive Health and Genetics, Hefei, China.,Biopreservation and Artificial Organs, Anhui Provincial Engineering Research Center, Anhui Medical University, Hefei, China
| | - Xiaojin He
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, Hefei, China.,NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract Anhui Medical University, Hefei, China.,Key Laboratory of Population Health Across Life Cycle, Anhui Medical University, Ministry of Education of the People's Republic of China, Hefei, China
| | - Yuping Xu
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, Hefei, China.,NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract Anhui Medical University, Hefei, China.,Key Laboratory of Population Health Across Life Cycle, Anhui Medical University, Ministry of Education of the People's Republic of China, Hefei, China
| | - Yunxia Cao
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, Hefei, China.,NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract Anhui Medical University, Hefei, China.,Key Laboratory of Population Health Across Life Cycle, Anhui Medical University, Ministry of Education of the People's Republic of China, Hefei, China
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Two novel mutations in PADI6 and TLE6 genes cause female infertility due to arrest in embryonic development. J Assist Reprod Genet 2021; 38:1551-1559. [PMID: 34036456 PMCID: PMC8266952 DOI: 10.1007/s10815-021-02194-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Accepted: 04/14/2021] [Indexed: 12/17/2022] Open
Abstract
Purpose This study aims to identify genetic causes of female infertility associated with recurrent failure of assisted reproductive technology (ART) characterized by embryonic developmental arrest. Methods We recruited infertile patients from two consanguineous families from the Reproductive Medicine Center of Guizhou Provincial People’s Hospital. Peripheral blood was collected for genomic DNA extraction. Two affected individuals and their family members were performed with whole-exome sequencing and Sanger validation in order to identify possible causative genes. For further analyzing the effect of splicing mutation on mRNA integrity in vivo, TLE6 cDNA from the peripheral blood lymphocyte of the affected individual was sequenced. In addition, the possible impact of the pathogenic mutation on the structure and function of the protein were also assessed. Results Two novel homozygous mutations in the peptidylarginine deiminase type VI (PADI6) and the transducin-like enhancer of split 6 (TLE6) genes were identified in the two families. One patient carried the frameshift deletion mutation c.831_832del:p.S278Pfs*59 of the PADI6 gene and the other patient carried the splicing mutation c.1245-2 A>G of the TLE6 gene. The analysis of the mRNA from the proband’s peripheral blood leukocytes confirmed aberrant splicing. Conclusions Our findings expand the mutational spectrum of PADI6 and TLE6 associated with embryonic developmental arrest and deepen our understanding of the genetic causes of infertility with recurrent ART failure.
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Wakabayashi M, Tamura S, Kanzaki S, Kosugi M, Yoshimura Y, Ito T, Nagata K, Sato K, Takada S, Sekita Y, Kimura T. Five multicopy gene family genes expressed during the maternal-to-zygotic transition are not essential for mouse development. Biochem Biophys Res Commun 2021; 534:752-757. [PMID: 33162025 DOI: 10.1016/j.bbrc.2020.11.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Accepted: 11/01/2020] [Indexed: 12/21/2022]
Abstract
Upon fertilization, oocytes transform into totipotent and pluripotent cleavage stage cells through the maternal-to-zygotic transition (MZT), which is regulated by maternal factors and zygotic genome activation (ZGA). Here, we investigated the in vivo function of 16 genes expressed with strong biases in oocytes and cleavage stage embryos by generating knockout (KO) mice. These MZT-associated genes are conserved across many mammalian species and include five multicopy gene family genes: the Nlrp9, Khdc1, Rfpl4, Trim43, and Zscan5 genes. Intercrosses between female KO and male KO mice, including Nlrp9a/b/c triple KO (TKO), Khdc1a/b/c TKO, Rfpl4a/b double KO (DKO), Trim43a/b/c TKO, and Zscan5b KO mice led to the birth to healthy offspring that in turn produced healthy offspring. Our study not only demonstrated that these MZT-associated genes are not essential for mouse development, but also provides valuable resources for analyzing the functions of these genes in other genetic backgrounds, in the presence of stressors, and under pathogenic conditions.
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Affiliation(s)
- Mizuki Wakabayashi
- Laboratory of Stem Cell Biology, Graduate School of Science, Japan; School of Science, Kitasato University, 1-15-1, Kitasato, Minami-ku, Sagamihara, Kanagawa, 252-0373, Japan
| | - Shiori Tamura
- Laboratory of Stem Cell Biology, Graduate School of Science, Japan; School of Science, Kitasato University, 1-15-1, Kitasato, Minami-ku, Sagamihara, Kanagawa, 252-0373, Japan
| | - Satoko Kanzaki
- Laboratory of Stem Cell Biology, Graduate School of Science, Japan; School of Science, Kitasato University, 1-15-1, Kitasato, Minami-ku, Sagamihara, Kanagawa, 252-0373, Japan
| | - Mayuko Kosugi
- Laboratory of Stem Cell Biology, Graduate School of Science, Japan; School of Science, Kitasato University, 1-15-1, Kitasato, Minami-ku, Sagamihara, Kanagawa, 252-0373, Japan
| | - Yuki Yoshimura
- Laboratory of Stem Cell Biology, Graduate School of Science, Japan; School of Science, Kitasato University, 1-15-1, Kitasato, Minami-ku, Sagamihara, Kanagawa, 252-0373, Japan
| | - Toshiaki Ito
- Laboratory of Stem Cell Biology, Graduate School of Science, Japan; School of Science, Kitasato University, 1-15-1, Kitasato, Minami-ku, Sagamihara, Kanagawa, 252-0373, Japan
| | - Kei Nagata
- School of Science, Kitasato University, 1-15-1, Kitasato, Minami-ku, Sagamihara, Kanagawa, 252-0373, Japan
| | - Kazuha Sato
- School of Science, Kitasato University, 1-15-1, Kitasato, Minami-ku, Sagamihara, Kanagawa, 252-0373, Japan
| | - Shuji Takada
- Department of Systems BioMedicine, National Research Institute for Child Health and Development, 2-10-1, Okura, Setagaya-ku, Tokyo, 157-8535, Japan
| | - Yoichi Sekita
- Laboratory of Stem Cell Biology, Graduate School of Science, Japan; School of Science, Kitasato University, 1-15-1, Kitasato, Minami-ku, Sagamihara, Kanagawa, 252-0373, Japan
| | - Tohru Kimura
- Laboratory of Stem Cell Biology, Graduate School of Science, Japan; School of Science, Kitasato University, 1-15-1, Kitasato, Minami-ku, Sagamihara, Kanagawa, 252-0373, Japan.
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44
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Lin J, Wang L. Oxidative Stress in Oocytes and Embryo Development: Implications for In Vitro Systems. Antioxid Redox Signal 2020; 34:1394-1406. [PMID: 33115254 DOI: 10.1089/ars.2020.8209] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Significance: To improve the outcomes of in vitro culture of human oocytes and embryos, the dynamic balance and roles of reactive oxygen species (ROS) in folliculogenesis and embryo development merit further consideration. Recent Advances: ROS have been demonstrated to participate in various signaling processes and act as mediators in various physiological events in germ cells. An imbalance between pro-oxidants and antioxidants seems to explain the high failure rate of assisted reproduction. Critical Issues: Oxidative stress induced by excessive ROS or insufficient antioxidant protection can cause detrimental effects on both male and female reproduction. In this study, oxidative stress in folliculogenesis and embryo development are summarized and the multiple modifiable factors of in vitro culture systems in relation to ROS are discussed. Future Directions: More studies are needed to establish an optimal redox state in in vitro culture systems for human oocytes and embryos.
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Affiliation(s)
- Jing Lin
- Laboratory for Reproductive Immunology, Hospital and Institute of Obstetrics and Gynecology, Shanghai Medical College, Fudan University, Shanghai, China
- Academy of Integrative Medicine, Fudan University, Shanghai, China
- Shanghai Key Laboratory of Female Reproductive Endocrine-Related Diseases, Shanghai, China
| | - Ling Wang
- Laboratory for Reproductive Immunology, Hospital and Institute of Obstetrics and Gynecology, Shanghai Medical College, Fudan University, Shanghai, China
- Academy of Integrative Medicine, Fudan University, Shanghai, China
- Shanghai Key Laboratory of Female Reproductive Endocrine-Related Diseases, Shanghai, China
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45
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Reproductive Outcomes from Maternal Loss of Nlrp2 Are Not Improved by IVF or Embryo Transfer Consistent with Oocyte-Specific Defect. Reprod Sci 2020; 28:1850-1865. [PMID: 33090377 DOI: 10.1007/s43032-020-00360-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Accepted: 10/11/2020] [Indexed: 12/23/2022]
Abstract
Nlrp2 encodes a protein of the oocyte subcortical maternal complex (SCMC), required for embryo development. We previously showed that loss of maternal Nlrp2 in mice causes subfertility, smaller litters with birth defects, and growth abnormalities in offspring, indicating that Nlrp2 is a maternal effect gene and that all embryos from Nlrp2-deficient females that were cultured in vitro arrested before the blastocysts stage. Here, we used time-lapse microscopy to examine the development of cultured embryos from superovulated Nlrp2-deficient and wild-type mice after in vivo and in vitro fertilization. Embryos from Nlrp2-deficient females had similar abnormal cleavage and fragmentation and arrested by blastocyst stage, irrespective of fertilization mode. This indicates that in vitro fertilization does not further perturb or improve the development of cultured embryos. We also transferred embryos from superovulated Nlrp2-deficient and wild-type females to wild-type recipients to investigate if the abnormal reproductive outcomes of Nlrp2-deficient females are primarily driven by oocyte dysfunction or if a suboptimal intra-uterine milieu is a necessary factor. Pregnancies with transferred embryos from Nlrp2-deficient females produced smaller litters, stillbirths, and offspring with birth defects and growth abnormalities. This indicates that the reproductive phenotype is oocyte-specific and is not rescued by development in a wild-type uterus. We further found abnormal DNA methylation at two maternally imprinted loci in the kidney of surviving young adult offspring, confirming persistent DNA methylation disturbances in surviving offspring. These findings have implications for fertility treatments for women with mutations in NLRP2 and other genes encoding SCMC proteins.
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46
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Zheng W, Hu H, Dai J, Zhang S, Gu Y, Dai C, Guo J, Xu X, Li Y, Zhang S, Hu L, Gong F, Lu G, Lin G. Expanding the genetic and phenotypic spectrum of the subcortical maternal complex genes in recurrent preimplantation embryonic arrest. Clin Genet 2020; 99:286-291. [PMID: 33020905 DOI: 10.1111/cge.13858] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2020] [Revised: 10/02/2020] [Accepted: 10/03/2020] [Indexed: 01/22/2023]
Abstract
The subcortical maternal complex (SCMC) is an oocyte-to-embryo-specific maternal functional module. Some variants of SCMC genes that contribute to preimplantation embryonic arrest have been identified. However, more novel variants should be identified to broaden the genetic and phenotypic spectrum of SCMC genes and establish their roles in embryonic development. We identified 13 novel variants in the SCMC genes, TLE6, NLRP5, NLRP2, and PADI6, from 10 of a total of 50 infertile females with recurrent preimplantation embryonic arrest. Six variants in TLE6 were found in five patients with embryonic arrest, accompanied by direct cleavage and severe fragmentation at the cleavage stage. Three patients carried NLRP5 variants, and one patient each who carried NLRP2 and PADI6 variants had subsequent poor or failed fertilization and cleavage arrest with a relatively lower ratio of severely fragmented embryos. Our findings expand the genetic and phenotypic spectrum of SCMC genes associated with human embryogenesis and might help lay the foundation for the genetic diagnosis of female infertility.
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Affiliation(s)
- Wei Zheng
- College of life science, Hunan Normal University, Changsha, China.,Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-XIANGYA, Changsha, China
| | - Huiling Hu
- Laboratory of Reproductive and Stem Cell Engineering, Key Lab of National Health and Family Planning Commission, Central South University, Changsha, China
| | - Jing Dai
- Laboratory of Reproductive and Stem Cell Engineering, Key Lab of National Health and Family Planning Commission, Central South University, Changsha, China
| | - Shuoping Zhang
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-XIANGYA, Changsha, China
| | - Yifan Gu
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-XIANGYA, Changsha, China.,Laboratory of Reproductive and Stem Cell Engineering, Key Lab of National Health and Family Planning Commission, Central South University, Changsha, China
| | - Can Dai
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-XIANGYA, Changsha, China
| | - Jing Guo
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-XIANGYA, Changsha, China
| | - Xinxin Xu
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-XIANGYA, Changsha, China
| | - Yuan Li
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-XIANGYA, Changsha, China
| | - Shunji Zhang
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-XIANGYA, Changsha, China
| | - Liang Hu
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-XIANGYA, Changsha, China.,Laboratory of Reproductive and Stem Cell Engineering, Key Lab of National Health and Family Planning Commission, Central South University, Changsha, China
| | - Fei Gong
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-XIANGYA, Changsha, China.,Laboratory of Reproductive and Stem Cell Engineering, Key Lab of National Health and Family Planning Commission, Central South University, Changsha, China
| | - Guangxiu Lu
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-XIANGYA, Changsha, China.,Laboratory of Reproductive and Stem Cell Engineering, Key Lab of National Health and Family Planning Commission, Central South University, Changsha, China
| | - Ge Lin
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-XIANGYA, Changsha, China.,Laboratory of Reproductive and Stem Cell Engineering, Key Lab of National Health and Family Planning Commission, Central South University, Changsha, China
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47
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Amoushahi M, Sunde L, Lykke-Hartmann K. The pivotal roles of the NOD-like receptors with a PYD domain, NLRPs, in oocytes and early embryo development†. Biol Reprod 2020; 101:284-296. [PMID: 31201414 DOI: 10.1093/biolre/ioz098] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Revised: 03/29/2019] [Accepted: 06/11/2019] [Indexed: 12/19/2022] Open
Abstract
Nucleotide-binding oligomerization domain (NOD)-like receptors with a pyrin domain (PYD), NLRPs, are pattern recognition receptors, well recognized for their important roles in innate immunity and apoptosis. However, several NLRPs have received attention for their new, specialized roles as maternally contributed genes important in reproduction and embryo development. Several NLRPs have been shown to be specifically expressed in oocytes and preimplantation embryos. Interestingly, and in line with divergent functions, NLRP genes reveal a complex evolutionary divergence. The most pronounced difference is the human-specific NLRP7 gene, not identified in rodents. However, mouse models have been extensively used to study maternally contributed NLRPs. The NLRP2 and NLRP5 proteins are components of the subcortical maternal complex (SCMC), which was recently identified as essential for mouse preimplantation development. The SCMC integrates multiple proteins, including KHDC3L, NLRP5, TLE6, OOEP, NLRP2, and PADI6. The NLRP5 (also known as MATER) has been extensively studied. In humans, inactivating variants in specific NLRP genes in the mother are associated with distinct phenotypes in the offspring, such as biparental hydatidiform moles (BiHMs) and preterm birth. Maternal-effect recessive mutations in KHDC3L and NLRP5 (and NLRP7) are associated with reduced reproductive outcomes, BiHM, and broad multilocus imprinting perturbations. The precise mechanisms of NLRPs are unknown, but research strongly indicates their pivotal roles in the establishment of genomic imprints and post-zygotic methylation maintenance, among other processes. Challenges for the future include translations of findings from the mouse model into human contexts and implementation in therapies and clinical fertility management.
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Affiliation(s)
| | - Lone Sunde
- Department of Biomedicine, Aarhus University, Aarhus, Denmark.,Department of Clinical Genetics, Aarhus University Hospital, Aarhus, Denmark
| | - Karin Lykke-Hartmann
- Department of Biomedicine, Aarhus University, Aarhus, Denmark.,Department of Clinical Genetics, Aarhus University Hospital, Aarhus, Denmark.,Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
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48
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Yatsenko SA, Rajkovic A. Genetics of human female infertility†. Biol Reprod 2020; 101:549-566. [PMID: 31077289 DOI: 10.1093/biolre/ioz084] [Citation(s) in RCA: 101] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 04/17/2019] [Accepted: 05/09/2019] [Indexed: 02/06/2023] Open
Abstract
About 10% of women of reproductive age are unable to conceive or carry a pregnancy to term. Female factors alone account for at least 35% of all infertility cases and comprise a wide range of causes affecting ovarian development, maturation of oocytes, and fertilization competence, as well as the potential of a fertilized egg for preimplantation development, implantation, and fetal growth. Genetic abnormalities leading to infertility in females comprise large chromosome abnormalities, submicroscopic chromosome deletion and duplications, and DNA sequence variations in the genes that control numerous biological processes implicated in oogenesis, maintenance of ovarian reserve, hormonal signaling, and anatomical and functional development of female reproductive organs. Despite the great number of genes implicated in reproductive physiology by the study of animal models, only a subset of these genes is associated with human infertility. In this review, we mainly focus on genetic alterations identified in humans and summarize recent knowledge on the molecular pathways of oocyte development and maturation, the crucial role of maternal-effect factors during embryogenesis, and genetic conditions associated with ovarian dysgenesis, primary ovarian insufficiency, early embryonic lethality, and infertility.
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Affiliation(s)
- Svetlana A Yatsenko
- Department of Pathology, University of Pittsburgh School of Medicine, Pittsburgh, PA.,Department of Obstetrics, Gynecology and Reproductive Sciences, University of Pittsburgh School of Medicine, Pittsburgh, PA.,Magee-Womens Research Institute, Pittsburgh, PA.,Department of Human Genetics, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA
| | - Aleksandar Rajkovic
- Department of Pathology, University of California San Francisco, San Francisco, CA.,Department of Obstetrics, Gynecology and Reproductive Sciences, University of California San Francisco, San Francisco, CA.,Institute of Human Genetics, University of California San Francisco, San Francisco, CA
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49
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Trebichalská Z, Kyjovská D, Kloudová S, Otevřel P, Hampl A, Holubcová Z. Cytoplasmic maturation in human oocytes: an ultrastructural study †. Biol Reprod 2020; 104:106-116. [PMID: 33404651 PMCID: PMC7786262 DOI: 10.1093/biolre/ioaa174] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 09/07/2020] [Accepted: 09/15/2020] [Indexed: 12/24/2022] Open
Abstract
Female fertility relies on successful egg development. Besides chromosome segregation, complex structural and biochemical changes in the cytoplasmic compartment are necessary to confer the female gamete the capacity to undergo normal fertilization and sustain embryonic development. Despite the profound impact on egg quality, morphological bases of cytoplasmic maturation remain largely unknown. Here, we report our findings from the ultrastructural analysis of 69 unfertilized human oocytes from 34 young and healthy egg donors. By comparison of samples fixed at three consecutive developmental stages, we explored how ooplasmic architecture changes during meiotic maturation in vitro. The morphometric image analysis supported observation that the major reorganization of cytoplasm occurs before polar body extrusion. The organelles initially concentrated around prophase nucleus were repositioned toward the periphery and evenly distributed throughout the ooplasm. As maturation progressed, distinct secretory apparatus appeared to transform into cortical granules that clustered underneath the oocyte's surface. The most prominent feature was the gradual formation of heterologous complexes composed of variable elements of endoplasmic reticulum and multiple mitochondria with primitive morphology. Based on the generated image dataset, we proposed a morphological map of cytoplasmic maturation, which may serve as a reference for future comparative studies. In conclusion, this work improves our understanding of human oocyte morphology, cytoplasmic maturation, and intracellular factors defining human egg quality. Although this analysis involved spare oocytes completing development in vitro, it provides essential insight into the enigmatic process by which human egg progenitors prepare for fertilization.
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Affiliation(s)
- Z Trebichalská
- Department of Histology and Embryology, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - D Kyjovská
- Reprofit International, Clinic of Reproductive Medicine, Brno, Czech Republic
| | - S Kloudová
- Reprofit International, Clinic of Reproductive Medicine, Brno, Czech Republic
| | - P Otevřel
- Reprofit International, Clinic of Reproductive Medicine, Brno, Czech Republic
| | - A Hampl
- Department of Histology and Embryology, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Z Holubcová
- Department of Histology and Embryology, Faculty of Medicine, Masaryk University, Brno, Czech Republic.,Reprofit International, Clinic of Reproductive Medicine, Brno, Czech Republic
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50
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Cubellis MV, Pignata L, Verma A, Sparago A, Del Prete R, Monticelli M, Calzari L, Antona V, Melis D, Tenconi R, Russo S, Cerrato F, Riccio A. Loss-of-function maternal-effect mutations of PADI6 are associated with familial and sporadic Beckwith-Wiedemann syndrome with multi-locus imprinting disturbance. Clin Epigenetics 2020; 12:139. [PMID: 32928291 PMCID: PMC7489023 DOI: 10.1186/s13148-020-00925-2] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 08/25/2020] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND PADI6 is a component of the subcortical maternal complex, a group of proteins that is abundantly expressed in the oocyte cytoplasm, but is required for the correct development of early embryo. Maternal-effect variants of the subcortical maternal complex proteins are associated with heterogeneous diseases, including female infertility, hydatidiform mole, and imprinting disorders with multi-locus imprinting disturbance. While the involvement of PADI6 in infertility is well demonstrated, its role in imprinting disorders is less well established. RESULTS We have identified by whole-exome sequencing analysis four cases of Beckwith-Wiedemann syndrome with multi-locus imprinting disturbance whose mothers are carriers of PADI6 variants. In silico analysis indicates that these variants result in loss of function, and segregation analysis suggests they act as either recessive or dominant-negative maternal-effect mutations. Genome-wide methylation analysis revealed heterogeneous and extensively altered methylation profiles of imprinted loci in the patients, including two affected sisters, but not in their healthy siblings. CONCLUSION Our results firmly establish the role of PADI6 in imprinting disorders. We report loss-of-function maternal-effect variants of PADI6 that are associated with heterogeneous multi-locus imprinting disturbances in the progeny. The rare finding of two siblings affected by Beckwith-Wiedemann syndrome suggests that in some cases, familial recurrence risk of these variants may be high. However, the heterogeneous phenotypes of the other pedigrees suggest that altered oocyte PADI6 function results in stochastic maintenance of methylation imprinting with unpredictable consequences on early embryo health.
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Affiliation(s)
| | - Laura Pignata
- Department of Environmental Biological and Pharmaceutical Sciences and Technologies (DiSTABiF), Università degli Studi della Campania "Luigi Vanvitelli", Caserta, Italy
| | - Ankit Verma
- Department of Environmental Biological and Pharmaceutical Sciences and Technologies (DiSTABiF), Università degli Studi della Campania "Luigi Vanvitelli", Caserta, Italy
- Institute of Genetics and Biophysics (IGB) "Adriano Buzzati-Traverso", Consiglio Nazionale delle Ricerche (CNR), Naples, Italy
| | - Angela Sparago
- Department of Environmental Biological and Pharmaceutical Sciences and Technologies (DiSTABiF), Università degli Studi della Campania "Luigi Vanvitelli", Caserta, Italy
| | - Rosita Del Prete
- Department of Environmental Biological and Pharmaceutical Sciences and Technologies (DiSTABiF), Università degli Studi della Campania "Luigi Vanvitelli", Caserta, Italy
| | - Maria Monticelli
- Department of Biology, Università degli Studi di Napoli "Federico II", Napoli, Italy
| | - Luciano Calzari
- Medical Cytogenetics and Molecular Genetics Laboratory, Centro di Ricerche e Tecnologie Biomediche IRCCS, Istituto Auxologico Italiano, Milan, Italy
| | - Vincenzo Antona
- Department of Sciences for Health Promotion and Mother and Child Care "G. D'Alessandro", University of Palermo, Palermo, Italy
| | - Daniela Melis
- Medical, Surgical, and Dental Department, Università degli Studi di Salerno, Salerno, Italy
| | - Romano Tenconi
- Department of Pediatrics, Clinical Genetics, Università di Padova, Padova, Italy
| | - Silvia Russo
- Medical Cytogenetics and Molecular Genetics Laboratory, Centro di Ricerche e Tecnologie Biomediche IRCCS, Istituto Auxologico Italiano, Milan, Italy
| | - Flavia Cerrato
- Department of Environmental Biological and Pharmaceutical Sciences and Technologies (DiSTABiF), Università degli Studi della Campania "Luigi Vanvitelli", Caserta, Italy.
| | - Andrea Riccio
- Department of Environmental Biological and Pharmaceutical Sciences and Technologies (DiSTABiF), Università degli Studi della Campania "Luigi Vanvitelli", Caserta, Italy.
- Institute of Genetics and Biophysics (IGB) "Adriano Buzzati-Traverso", Consiglio Nazionale delle Ricerche (CNR), Naples, Italy.
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