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Paulsen B, Piechota S, Barrachina F, Giovannini A, Kats S, Potts KS, Rockwell G, Marchante M, Estevez SL, Noblett AD, Figueroa AB, Aschenberger C, Kelk DA, Forti M, Marcinyshyn S, Wiemer K, Sanchez M, Belchin P, Lee JA, Buyuk E, Slifkin RE, Smela MP, Fortuna PRJ, Chatterjee P, McCulloh DH, Copperman AB, Ordonez-Perez D, Klein JU, Kramme CC. Rescue in vitro maturation using ovarian support cells of human oocytes from conventional stimulation cycles yields oocytes with improved nuclear maturation and transcriptomic resemblance to in vivo matured oocytes. J Assist Reprod Genet 2024:10.1007/s10815-024-03143-4. [PMID: 38814543 DOI: 10.1007/s10815-024-03143-4] [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: 08/10/2023] [Accepted: 05/09/2024] [Indexed: 05/31/2024] Open
Abstract
PURPOSE Determine if the gene expression profiles of ovarian support cells (OSCs) and cumulus-free oocytes are bidirectionally influenced by co-culture during in vitro maturation (IVM). METHODS Fertility patients aged 25 to 45 years old undergoing conventional ovarian stimulation donated denuded immature oocytes for research. Oocytes were randomly allocated to either OSC-IVM culture (intervention) or Media-IVM culture (control) for 24-28 h. The OSC-IVM culture condition was composed of 100,000 OSCs in suspension culture with human chorionic gonadotropin (hCG), recombinant follicle stimulating hormone (rFSH), androstenedione, and doxycycline supplementation. The Media-IVM control lacked OSCs and contained the same supplementation. A limited set of in vivo matured MII oocytes were donated for comparative evaluation. Endpoints consisted of MII formation rate, morphological and spindle quality assessment, and gene expression analysis compared to in vitro and in vivo controls. RESULTS OSC-IVM resulted in a statistically significant improvement in MII formation rate compared to the Media-IVM control, with no apparent effect on morphology or spindle assembly. OSC-IVM MII oocytes displayed a closer transcriptomic maturity signature to IVF-MII controls than Media-IVM control MII oocytes. The gene expression profile of OSCs was modulated in the presence of oocytes, displaying culture- and time-dependent differential gene expression during IVM. CONCLUSION The OSC-IVM platform is a novel tool for rescue maturation of human oocytes, yielding oocytes with improved nuclear maturation and a closer transcriptomic resemblance to in vivo matured oocytes, indicating a potential enhancement in oocyte cytoplasmic maturation. These improvements on oocyte quality after OSC-IVM are possibly occurring through bidirectional crosstalk of cumulus-free oocytes and ovarian support cells.
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Affiliation(s)
- Bruna Paulsen
- Gameto Inc., 430 E. 29th St Fl 14, New York, NY, 10016, USA
| | | | | | | | - Simone Kats
- Gameto Inc., 430 E. 29th St Fl 14, New York, NY, 10016, USA
| | | | | | | | - Samantha L Estevez
- Obstetrics, Gynecology, and Reproductive Science, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | | | | | | | | | | | | | | | - Marta Sanchez
- Ruber Juan Bravo University Hospital, Eugin Group, Madrid, Spain
| | - Pedro Belchin
- Ruber Juan Bravo University Hospital, Eugin Group, Madrid, Spain
| | - Joseph A Lee
- Reproductive Medicine Associates of New York, New York, NY, USA
| | - Erkan Buyuk
- Obstetrics, Gynecology, and Reproductive Science, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Reproductive Medicine Associates of New York, New York, NY, USA
| | - Rick E Slifkin
- Reproductive Medicine Associates of New York, New York, NY, USA
| | - Merrick Pierson Smela
- Wyss Institute, Harvard Medical School, Boston, MA, USA
- Department of Genetics, Harvard Medical School, Boston, MA, USA
| | - Patrick R J Fortuna
- Wyss Institute, Harvard Medical School, Boston, MA, USA
- Department of Genetics, Harvard Medical School, Boston, MA, USA
| | - Pranam Chatterjee
- Department of Biomedical Engineering, Duke University, Durham, NC, USA
- Department of Computer Science, Duke University, Durham, NC, USA
| | | | - Alan B Copperman
- Obstetrics, Gynecology, and Reproductive Science, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Reproductive Medicine Associates of New York, New York, NY, USA
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Yu T, Ning J, Chen M, Wang F, Liu G, Wang Q, Xu X, Wang C, Lu X. Potential Involvement of DNA Methylation in Hybrid Sterility in Hermaphroditic Argopecten Scallops. MARINE BIOTECHNOLOGY (NEW YORK, N.Y.) 2023; 25:701-717. [PMID: 37548862 DOI: 10.1007/s10126-023-10233-4] [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: 04/18/2023] [Accepted: 07/19/2023] [Indexed: 08/08/2023]
Abstract
DNA methylation is an important epigenetic modification factor in regulating fertility. Corresponding process remains poorly investigated in hermaphroditic scallops. The interspecific F1 hybrids between the hermaphroditic bay scallops (Argopecten irradians) and Peruvian scallops (Argopecten purpuratus) exhibited significant heterosis in yield, but sterility in hybrids obstructs the utilization of the genetic resources. However, the determination mechanism of hybrid sterility in the hermaphroditic Argopecten scallops is still unclear. In this study, the effect of DNA methylation in the hybrid sterility of hermaphroditic Argopecten scallops was explored. The results showed that the mean methylation level was higher in sterile hybrids than fertile hybrids, especially on chromosome 11 of the paternal parent. A total of 61,062 differentially methylated regions (DMRs) were identified, containing 3619 differentially methylated genes (DMGs) and 1165 differentially methylated promoters that are located in the DMRs of CG sequence context. The hyper-methylated genes were enriched into five KEGG pathways, including ubiquitin-mediated proteolysis, ECM-receptor interaction, non-homologous end-joining, notch signaling, and the mismatch repair pathways. The DMGs might induce hybrid sterility by inhibition of oogenesis and egg maturation, induction of apoptosis, increased ROS, and insufficient ATP supply. Our results would enrich the determination mechanism of hybrid sterility and provide new insights into the utilization of the genetic resources of the interspecific hybrids.
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Affiliation(s)
- Tieying Yu
- Research and Development Center for Efficient Utilization of Coastal Bioresources, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, 264003, Yantai, Shandong, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Junhao Ning
- Research and Development Center for Efficient Utilization of Coastal Bioresources, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, 264003, Yantai, Shandong, China
| | - Min Chen
- Research and Development Center for Efficient Utilization of Coastal Bioresources, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, 264003, Yantai, Shandong, China
| | - Fukai Wang
- College of Marine Science and Engineering, Qingdao Agricultural University, 266109, Qingdao, Shandong, China
| | - Guilong Liu
- Yantai Spring-Sea AquaSeed, Ltd., 264006, Yantai, China
| | - Quanchao Wang
- Research and Development Center for Efficient Utilization of Coastal Bioresources, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, 264003, Yantai, Shandong, China
| | - Xin Xu
- Yantai Spring-Sea AquaSeed, Ltd., 264006, Yantai, China
| | - Chunde Wang
- Research and Development Center for Efficient Utilization of Coastal Bioresources, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, 264003, Yantai, Shandong, China
- College of Marine Science and Engineering, Qingdao Agricultural University, 266109, Qingdao, Shandong, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xia Lu
- Research and Development Center for Efficient Utilization of Coastal Bioresources, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, 264003, Yantai, Shandong, China.
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Riepsamen AH, Donoghoe MW, Indran IR, Hechtman L, Robertson DM, Gilchrist RB, Ledger WL, Yong E. Serum GDF9 and BMP15 as potential markers of ovarian function in women with and without polycystic ovary syndrome. Clin Endocrinol (Oxf) 2023; 98:567-577. [PMID: 36372988 PMCID: PMC10952143 DOI: 10.1111/cen.14851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 10/31/2022] [Accepted: 11/11/2022] [Indexed: 11/16/2022]
Abstract
OBJECTIVE Growth differentiation factor-9 (GDF9) and bone morphogenetic protein-15 (BMP15) are critical paracrine regulators of female fertility and are predominantly expressed by oocytes. However, it is unknown if serum concentrations reflect changes in ovarian function and/or reproductive endocrine disorders. This study aimed to determine if serum GDF9/BMP15 are associated with ovarian, pituitary, oestrogenic, androgenic and metabolic characteristics and the ovarian pathologies, polycystic ovarian morphology (PCOM) and polycystic ovary syndrome (PCOS). DESIGN Women aged 21-45 years (n = 381) were included from a cross-sectional study at the National University Hospital, Singapore. PATIENTS Participants were volunteers and patients with possible PCOS. MEASUREMENTS Anthropometric measurements, transvaginal ultrasound scans and serum sampling were performed and a questionnairecompleted. Serum GDF9 and BMP15 concentrations were matched with menstrual cycle length, ovarian protein and steroid hormone production, pituitary hormone production and metabolic assessments in women with PCOM or PCOS and those with neither (control). RESULTS Serum GDF9 and BMP15 were detectable in 40% and 41% of women, respectively and were positively correlated with each other (r = 0.08, p = 0.003). GDF9, but not BMP15, was positively correlated with ovarian volume (p = 0.02) and antral follicle count (AFC) (p = 0.004), but not with anti-Müllerian hormone (p = 0.05). However, serum GDF9 and BMP15 concentrations were not significantly different between control, PCOM and PCOS women, nor associated with androgenic or metabolic PCOS features. However, the relationship between GDF9 and AFC differed between control, PCOM and PCOS women (p = 0.02). CONCLUSIONS Serum GDF9 and BMP15 concentrations somewhat reflect ovarian but not androgenic or metabolic characteristics of PCOS, with increased GDF9 reflecting high AFC as seen in PCOM/PCOS.
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Affiliation(s)
- Angelique H. Riepsamen
- Fertility & Research Centre, School of Clinical MedicineUniversity of New South Wales SydneyNew South WalesSydneyAustralia
| | - Mark W. Donoghoe
- Stats Central, Mark Wainwright Analytical CentreUniversity of New South Wales SydneySydneyNew South WalesAustralia
| | - Inthrani R. Indran
- Department of Obstetrics & Gynaecology, Yong Loo Lin School of MedicineNational University of SingaporeSingaporeSingapore
- Department of Pharmacology, Yong Loo Lin School of MedicineNational University of SingaporeSingaporeSingapore
| | - Leah Hechtman
- Fertility & Research Centre, School of Clinical MedicineUniversity of New South Wales SydneyNew South WalesSydneyAustralia
| | - David M. Robertson
- Fertility & Research Centre, School of Clinical MedicineUniversity of New South Wales SydneyNew South WalesSydneyAustralia
| | - Robert B. Gilchrist
- Fertility & Research Centre, School of Clinical MedicineUniversity of New South Wales SydneyNew South WalesSydneyAustralia
| | - William L. Ledger
- Fertility & Research Centre, School of Clinical MedicineUniversity of New South Wales SydneyNew South WalesSydneyAustralia
| | - Eu‐Leong Yong
- Department of Obstetrics & Gynaecology, Yong Loo Lin School of MedicineNational University of SingaporeSingaporeSingapore
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Haddad-Filho H, Tosatti JAG, Vale FM, Gomes KB, Reis FM. Updates in diagnosing polycystic ovary syndrome-related infertility. Expert Rev Mol Diagn 2023; 23:123-132. [PMID: 36856088 DOI: 10.1080/14737159.2023.2177536] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2023]
Abstract
INTRODUCTION Polycystic ovary syndrome (PCOS) is a condition that affects approximately 13% of reproductive age women and is characterized by androgen excess, menstrual irregularity and altered ovarian morphology. PCOS presents a complex etiology and pathophysiology, which still requires a detailed investigation of biochemical signatures to identify the molecules and mechanisms that govern it. AREAS COVERED This narrative review summarizes the main molecular alterations found in the ovarian follicular fluid, endometrium and placenta of women with PCOS, and the genotypes potentially associated with the outcome of infertility treatments in PCOS. EXPERT OPINION PCOS is associated with multiple alterations in growth factors, sex steroid hormones, reactive oxygen species, proinflammatory cytokines and adipokines, which contribute to follicle arrest/ anovulation or suboptimal corpus luteum function, and ultimately to menstrual irregularity and hyperandrogenic symptoms. A panel of PCOS biomarkers should include, besides ovarian products, markers of adipose tissue function, insulin resistance, vascular health, and low-grade chronic inflammation. The effects of ovarian stimulation drugs on infertile women with PCOS are likely to be modified by genetic factors, but the available evidence is heterogeneous; therefore, future studies should evaluate standard treatments and pre-specified outcomes of interest to provide more conclusive answers.
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Affiliation(s)
- Hélio Haddad-Filho
- Graduate Program in Surgery, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.,Department of Medicine, Universidade Federal de Lavras, Lavras, Brazil
| | - Jéssica A G Tosatti
- Department of Clinical and Toxicological Analyzes - Faculty of Pharmacy, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Fernanda M Vale
- Department of Clinical and Toxicological Analyzes - Faculty of Pharmacy, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Karina B Gomes
- Department of Clinical and Toxicological Analyzes - Faculty of Pharmacy, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Fernando M Reis
- Division of Human Reproduction, Department of Obstetrics and Gynecology, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
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Wei L, Xia H, Liang Z, Yu H, Liang Z, Yang X, Li Y. Disrupted expression of long non-coding RNAs in the human oocyte: the possible epigenetic culprits leading to recurrent oocyte maturation arrest. J Assist Reprod Genet 2022; 39:2215-2225. [PMID: 36018477 PMCID: PMC9596671 DOI: 10.1007/s10815-022-02596-9] [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: 04/29/2022] [Accepted: 08/10/2022] [Indexed: 11/26/2022] Open
Abstract
PURPOSE To depict the lncRNA expression during human oocyte maturation and explore the lncRNAs leading to recurrent oocyte maturation arrest. METHODS LncRNA sequencing was performed on pooled RNA from 20 oocytes of each group (recurrent oocyte maturation arrest (ROMA), of germinal vesicle (GV), metaphase I (MI), or metaphase II (MII) stages. Bioinformatics software was deployed to compare the lncRNA differential expression between the normal and ROMA oocytes. The co-expression of lncRNA/mRNA was illustrated with the Cytoscape software. The pooled RNA from every 10 oocytes of each group (ROMA, GV, MI, MII) was extracted for further qPCR validation. RESULTS There were 17 downregulated and 3 upregulated lncRNAs in the ROMA oocyte. Among them, co-expression analysis indicated that NEAT1 and NORAD were both downregulated. Basing on the KEGG enrichment analysis, PRCKA and JAK3 might be the target genes in the PI3K-Akt pathway and modulated by NEAT1 and NORAD. As validated by qPCR, the expressional levels of lncRNA candidates (NEAT1 and NORAD) and their target genes (PRKCA and JAK3) were confirmed to be extremely lower in the ROMA oocyte than in the normal oocyte. CONCLUSION By targeting the PI3K-Akt pathway genes PRKCA and JAK3, the abnormal expression of NEAT1 and NORAD is suggested to impede oocyte maturation and impair oocyte genome integrity.
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Affiliation(s)
- Lina Wei
- Division of Histology and Embryology, International Joint Laboratory for Embryonic Development and Prenatal Medicine, Medical College, Jinan University, Guangzhou, China
| | - Huayang Xia
- Center for Reproductive Medicine, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, People's Republic of China
| | - Zhongkun Liang
- Center for Reproductive Medicine, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, People's Republic of China
| | - Hao Yu
- Urology Department, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, People's Republic of China
| | - Zhenjie Liang
- Center for Reproductive Medicine, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, People's Republic of China
| | - Xi Yang
- Center for Reproductive Medicine, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, People's Republic of China
| | - Yi Li
- Center for Reproductive Medicine, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, People's Republic of China.
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Kristensen SG, Kumar A, Mamsen LS, Kalra B, Pors SE, Bøtkjær JA, Macklon KT, Fedder J, Ernst E, Hardy K, Franks S, Andersen CY. Intrafollicular Concentrations of the Oocyte-secreted Factors GDF9 and BMP15 Vary Inversely in Polycystic Ovaries. J Clin Endocrinol Metab 2022; 107:e3374-e3383. [PMID: 35511085 PMCID: PMC9282257 DOI: 10.1210/clinem/dgac272] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2022] [Indexed: 11/19/2022]
Abstract
CONTEXT The oocyte-secreted factors growth differentiation factor 9 (GDF9) and bone morphogenetic protein 15 (BMP15) play essential roles in follicle development and oocyte maturation, and aberrant regulation might contribute to the pathogenesis of polycystic ovary syndrome. OBJECTIVE Are there measurable differences in concentrations of GDF9, BMP15, and the GDF9/BMP15 heterodimer in small antral follicle fluids from women with and without polycystic ovaries (PCO)? DESIGN AND SETTING Follicle fluids (n = 356) were collected from 4- to 11-mm follicles in unstimulated ovaries of 87 women undergoing ovarian tissue cryopreservation for fertility preservation. PATIENTS Twenty-seven women with PCO were identified and 60 women without PCO-like characteristics (non-PCO women) were matched according to age and follicle size. MAIN OUTCOME MEASURES Intrafollicular concentrations of GDF9, BMP15, GDF9/BMP15 heterodimer, anti-Mullerian hormone (AMH), inhibin-A and -B, total inhibin, activin-B and -AB, and follistatin were measured using enzyme-linked immunosorbent assays. RESULTS The detectability of GDF9, BMP15, and the GDF9/BMP15 heterodimer were 100%, 94.4%, and 91.5%, respectively, and concentrations were significantly negatively correlated with increasing follicle size (P < 0.0001). GDF9 was significantly higher in women with PCO (PCO: 4230 ± 189 pg/mL [mean ± SEM], n = 188; non-PCO: 3498 ± 199 pg/mL, n = 168; P < 0.03), whereas BMP15 was lower in women with PCO (PCO: 431 ± 40 pg/mL, n = 125; non-PCO: 573 ± 55 pg/mL, n = 109; P = 0.10), leading to a significantly higher GDF9:BMP15 ratio in women with PCO (P < 0.01). Significant positive associations between BMP15 and AMH, activins, and inhibins in non-PCO women switched to negative associations in women with PCO. CONCLUSIONS Intrafollicular concentrations of GDF9 and BMP15 varied inversely in women with PCO reflecting an aberrant endocrine environment. An increased GDF9:BMP15 ratio may be a new biomarker for PCO.
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Affiliation(s)
- Stine Gry Kristensen
- Correspondence: Stine Gry Kristensen, PhD, Laboratory of Reproductive Biology, Section 5701, Copenhagen University Hospital – Rigshospitalet, University of Copenhagen, Blegdamsvej 9, DK-2100 Copenhagen, Denmark.
| | | | - Linn Salto Mamsen
- Laboratory of Reproductive Biology, The Juliane Marie Centre for Women, Children and Reproduction, University Hospital of Copenhagen, 2100 Copenhagen, Denmark
| | | | - Susanne Elisabeth Pors
- Laboratory of Reproductive Biology, The Juliane Marie Centre for Women, Children and Reproduction, University Hospital of Copenhagen, 2100 Copenhagen, Denmark
| | - Jane Alrø Bøtkjær
- Laboratory of Reproductive Biology, The Juliane Marie Centre for Women, Children and Reproduction, University Hospital of Copenhagen, 2100 Copenhagen, Denmark
| | - Kirsten Tryde Macklon
- The Fertility Clinic, Copenhagen University Hospital, Rigshospitalet, 2100 Copenhagen, Denmark
| | - Jens Fedder
- Centre of Andrology & Fertility Clinic, Odense University Hospital, 5000 Odense, Denmark
| | - Erik Ernst
- Department of Gynecology and Obstetrics, Horsens Regional Hospital, 8700 Horsens, Denmark
| | - Kate Hardy
- Institute of Reproductive and Developmental Biology, Imperial College London, Hammersmith Hospital, London W12 0NN, United Kingdom
| | - Stephen Franks
- Institute of Reproductive and Developmental Biology, Imperial College London, Hammersmith Hospital, London W12 0NN, United Kingdom
| | - Claus Yding Andersen
- Laboratory of Reproductive Biology, The Juliane Marie Centre for Women, Children and Reproduction, University Hospital of Copenhagen, 2100 Copenhagen, Denmark
- Faculty of Health and Medical Sciences, University of Copenhagen, 2100 Copenhagen, Denmark
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Enhanced pro-apoptosis gene signature following the activation of TAp63α in oocytes upon γ irradiation. Cell Death Dis 2022; 13:204. [PMID: 35246516 PMCID: PMC8897389 DOI: 10.1038/s41419-022-04659-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 02/01/2022] [Accepted: 02/14/2022] [Indexed: 12/20/2022]
Abstract
Specialized surveillance mechanisms are essential to maintain the genetic integrity of germ cells, which are not only the source of all somatic cells but also of the germ cells of the next generation. DNA damage and chromosomal aberrations are, therefore, not only detrimental for the individual but affect the entire species. In oocytes, the surveillance of the structural integrity of the DNA is maintained by the p53 family member TAp63α. The TAp63α protein is highly expressed in a closed and inactive state and gets activated to the open conformation upon the detection of DNA damage, in particular DNA double-strand breaks. To understand the cellular response to DNA damage that leads to the TAp63α triggered oocyte death we have investigated the RNA transcriptome of oocytes following irradiation at different time points. The analysis shows enhanced expression of pro-apoptotic and typical p53 target genes such as CDKn1a or Mdm2, concomitant with the activation of TAp63α. While DNA repair genes are not upregulated, inflammation-related genes become transcribed when apoptosis is initiated by activation of STAT transcription factors. Furthermore, comparison with the transcriptional profile of the ΔNp63α isoform from other studies shows only a minimal overlap, suggesting distinct regulatory programs of different p63 isoforms.
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Kashir J, Ganesh D, Jones C, Coward K. OUP accepted manuscript. Hum Reprod Open 2022; 2022:hoac003. [PMID: 35261925 PMCID: PMC8894871 DOI: 10.1093/hropen/hoac003] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 01/16/2022] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Oocyte activation deficiency (OAD) is attributed to the majority of cases underlying failure of ICSI cycles, the standard treatment for male factor infertility. Oocyte activation encompasses a series of concerted events, triggered by sperm-specific phospholipase C zeta (PLCζ), which elicits increases in free cytoplasmic calcium (Ca2+) in spatially and temporally specific oscillations. Defects in this specific pattern of Ca2+ release are directly attributable to most cases of OAD. Ca2+ release can be clinically mediated via assisted oocyte activation (AOA), a combination of mechanical, electrical and/or chemical stimuli which artificially promote an increase in the levels of intra-cytoplasmic Ca2+. However, concerns regarding safety and efficacy underlie potential risks that must be addressed before such methods can be safely widely used. OBJECTIVE AND RATIONALE Recent advances in current AOA techniques warrant a review of the safety and efficacy of these practices, to determine the extent to which AOA may be implemented in the clinic. Importantly, the primary challenges to obtaining data on the safety and efficacy of AOA must be determined. Such questions require urgent attention before widespread clinical utilization of such protocols can be advocated. SEARCH METHODS A literature review was performed using databases including PubMed, Web of Science, Medline, etc. using AOA, OAD, calcium ionophores, ICSI, PLCζ, oocyte activation, failed fertilization and fertilization failure as keywords. Relevant articles published until June 2019 were analysed and included in the review, with an emphasis on studies assessing large-scale efficacy and safety. OUTCOMES Contradictory studies on the safety and efficacy of AOA do not yet allow for the establishment of AOA as standard practice in the clinic. Heterogeneity in study methodology, inconsistent sample inclusion criteria, non-standardized outcome assessments, restricted sample size and animal model limitations render AOA strictly experimental. The main scientific concern impeding AOA utilization in the clinic is the non-physiological method of Ca2+ release mediated by most AOA agents, coupled with a lack of holistic understanding regarding the physiological mechanism(s) underlying Ca2+ release at oocyte activation. LIMITATIONS, REASONS FOR CAUTION The number of studies with clinical relevance using AOA remains significantly low. A much wider range of studies examining outcomes using multiple AOA agents are required. WIDER IMPLICATIONS In addition to addressing the five main challenges of studies assessing AOA safety and efficacy, more standardized, large-scale, multi-centre studies of AOA, as well as long-term follow-up studies of children born from AOA, would provide evidence for establishing AOA as a treatment for infertility. The delivery of an activating agent that can more accurately recapitulate physiological fertilization, such as recombinant PLCζ, is a promising prospect for the future of AOA. Further to PLCζ, many other avenues of physiological oocyte activation also require urgent investigation to assess other potential physiological avenues of AOA. STUDY FUNDING/COMPETING INTERESTS D.G. was supported by Stanford University’s Bing Overseas Study Program. J.K. was supported by a Healthcare Research Fellowship Award (HF-14-16) made by Health and Care Research Wales (HCRW), alongside a National Science, Technology, and Innovation plan (NSTIP) project grant (15-MED4186-20) awarded by the King Abdulaziz City for Science and Technology (KACST). The authors have no competing interests to declare.
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Affiliation(s)
| | | | - Celine Jones
- Nuffield Department of Women’s & Reproductive Health, University of Oxford, Level 3, Women’s Centre, John Radcliffe Hospital, Oxford, UK
| | - Kevin Coward
- Correspondence address. Nuffield Department of Women’s & Reproductive Health, University of Oxford, Level 3, Women’s Centre, John Radcliffe Hospital, Oxford, OS3 9DU, UK. E-mail: https://orcid.org/0000-0003-3577-4041
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Tsai TC, Chiung HK, Chen LH, Wu HM. The potential role of assisted oocyte activation in the management of a POSEIDON group 3 patient with fertilization failure: A case report and literature review. Taiwan J Obstet Gynecol 2021; 60:567-569. [PMID: 33966751 DOI: 10.1016/j.tjog.2021.03.034] [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] [Accepted: 05/18/2020] [Indexed: 12/01/2022] Open
Abstract
OBJECTIVE Assisted oocyte activation combined with ICSI (ICSI-AOA) has been reported to improve fertilization outcomes of couples with oocyte activation deficiency (OAD). Although there's no sufficient evidence to support ICSI-AOA as routine use, it might be beneficial for POSEIDON group 3 patients with suspected oocyte-related OAD. CASE REPORT A 29-year-old female presented with a history of primary infertility for two years. She was classified as a POSEIDON group 3 patient and had a total fertilization failure history. With the help of ICSI-AOA, six oocytes were successfully fertilized. Pregnancy was later confirmed after embryo transfer. A living infant was born after 34 weeks of pregnancy. CONCLUSION OAD should be taken into consideration for POSEIDON group 3 patients since low Antimüllerian hormone is associated decreased quality. Further research needs to be done to understand the mechanism underlying oocyte-related OAD and the potential role of ICSI-AOA in young patients with suboptimal ovarian response.
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Affiliation(s)
- Tian-Chi Tsai
- Department of Obstetrics and Gynecology, Chang Gung Memorial Hospital, Chang Gung University, Taipei, Taiwan
| | - Huan-Ka Chiung
- Department of Obstetrics and Gynecology, Chang Gung Memorial Hospital, Chang Gung University, Taipei, Taiwan
| | - Liang-Hsuan Chen
- Department of Obstetrics and Gynecology, Chang Gung Memorial Hospital, Chang Gung University, Taipei, Taiwan
| | - Hsien-Ming Wu
- Department of Obstetrics and Gynecology, Chang Gung Memorial Hospital, Chang Gung University, Taipei, Taiwan.
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Riepsamen AH, Donoghoe MW, Baerwald A, Pankhurst MW, Lien S, Chong YH, Robertson DM, Ledger WL, Gilchrist RB. Exploratory analysis of serum concentrations of oocyte biomarkers growth differentiation factor 9 and bone morphogenetic protein 15 in ovulatory women across the menstrual cycle. Fertil Steril 2021; 116:546-557. [PMID: 33775397 DOI: 10.1016/j.fertnstert.2021.02.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2020] [Revised: 01/18/2021] [Accepted: 02/01/2021] [Indexed: 10/21/2022]
Abstract
OBJECTIVE To characterize and evaluate the variation in serum concentrations of oocyte-secreted growth differentiation factor 9 (GDF9) and bone morphogenetic protein 15 (BMP15) throughout the menstrual cycle in women from young to advanced reproductive ages. DESIGN Cross-sectional, observational, and exploratory study. SETTING Multicenter university-based clinical practices and laboratories. PATIENT(S) Serum was collected every 1-3 days throughout the menstrual cycle from 3 cohorts of healthy, ovulatory women: menses to late luteal phase (21-29 years of age; n = 16; University of Otago) and across one interovulatory interval (18-35 years of age; n = 10; and 45-50 years of age; n = 15; University of Saskatchewan). INTERVENTION(S) None. MAIN OUTCOME MEASURE(S) To detect the changes in serum GDF9 and BMP15 across the cycle, mean concentration and variance were statistically modeled using a generalized additive model of location, shape and scale (GAMLSS). Follicle-stimulating hormone, luteinizing hormone, estradiol, progesterone, and anti-Müllerian hormone were also assessed. RESULT(S) GDF9 and BMP15 were detectable in 54% and 73% of women and varied 236-fold and 52-fold between women, respectively. Across the menstrual cycle, there were minimal changes in GDF9 or BMP15 within a woman for all cohorts, with no significant differences detected in the modeled mean concentrations. However, modeled variances were highest in the luteal phases of all women for BMP15 immediately after ovulation, regardless of age. CONCLUSION(S) Serial changes in GDF9 or BMP15 concentrations across the cycle were not statistically detected and are likewise similar across the reproductive lifespan. Further research is required to fully elucidate the utility of these oocyte biomarkers at diagnosing fertility potential and/or disease.
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Affiliation(s)
- Angelique H Riepsamen
- Fertility and Research Centre, School of Women's and Children's Health, University of New South Wales Sydney, New South Wales, Australia.
| | - Mark W Donoghoe
- Stats Central, Mark Wainwright Analytical Centre, University of New South Wales Sydney, New South Wales, Australia
| | - Angela Baerwald
- Department of Academic Family Medicine, West Winds Primary Health Center, Saskatchewan, Canada; College of Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Michael W Pankhurst
- Department of Anatomy, School of Biomedical Sciences, University of Otago, Dunedin, New Zealand
| | - Shelly Lien
- Fertility and Research Centre, School of Women's and Children's Health, University of New South Wales Sydney, New South Wales, Australia
| | - Yih Harng Chong
- Department of Anatomy, School of Biomedical Sciences, University of Otago, Dunedin, New Zealand
| | - David M Robertson
- Fertility and Research Centre, School of Women's and Children's Health, University of New South Wales Sydney, New South Wales, Australia
| | - William L Ledger
- Fertility and Research Centre, School of Women's and Children's Health, University of New South Wales Sydney, New South Wales, Australia
| | - Robert B Gilchrist
- Fertility and Research Centre, School of Women's and Children's Health, University of New South Wales Sydney, New South Wales, Australia
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11
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Eijkenboom L, Mulder C, van der Reijden B, van Mello N, van Leersum J, Koorenhof-Scheele T, Braat D, Beerendonk C, Peek R. Purging human ovarian cortex of contaminating leukaemic cells by targeting the mitotic catastrophe signalling pathway. J Assist Reprod Genet 2021; 38:1571-1588. [PMID: 33725274 PMCID: PMC8266964 DOI: 10.1007/s10815-021-02081-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Accepted: 01/19/2021] [Indexed: 12/18/2022] Open
Abstract
PURPOSE Is it possible to eliminate metastasised chronic myeloid leukaemia (CML) and acute myeloid leukaemia (AML) cells from ovarian cortex fragments by inhibition of Aurora B/C kinases (AURKB/C) without compromising ovarian tissue or follicles? METHODS Human ovarian cortex tissue with experimentally induced tumour foci of CML, AML and primary cells of AML patients were exposed to a 24h treatment with 1 μM GSK1070916, an AURKB/C inhibitor, to eliminate malignant cells by invoking mitotic catastrophe. After treatment, the inhibitor was removed, followed by an additional culture period of 6 days to allow any remaining tumour cells to form new foci. Ovarian tissue integrity after treatment was analysed by four different assays. Appropriate controls were included in all experiments. RESULTS Foci of metastasised CML and AML cells in ovarian cortex tissue were severely affected by a 24h ex vivo treatment with an AURKB/C inhibitor, leading to the formation of multi-nuclear syncytia and large-scale apoptosis. Ovarian tissue morphology and viability was not compromised by the treatment, as no significant difference was observed regarding the percentage of morphologically normal follicles, follicular viability, glucose uptake or in vitro growth of small follicles between ovarian cortex treated with 1 μM GSK1070916 and the control. CONCLUSION Purging of CML/AML metastases in ovarian cortex is possible by targeting the Mitotic Catastrophe Signalling Pathway using GSK1070916 without affecting the ovarian tissue. This provides a therapeutic strategy to prevent reintroduction of leukaemia and enhances safety of autotransplantation in leukaemia patients currently considered at high risk for ovarian involvement.
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MESH Headings
- Apoptosis/drug effects
- Aurora Kinase B/genetics
- Aurora Kinase C/genetics
- Aza Compounds/pharmacology
- Cell Line, Tumor
- Cell Survival/drug effects
- Cryopreservation
- Female
- Humans
- Indoles/pharmacology
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/genetics
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/pathology
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/therapy
- Leukemia, Myeloid, Acute/genetics
- Leukemia, Myeloid, Acute/pathology
- Leukemia, Myeloid, Acute/therapy
- Mitosis/drug effects
- Mitosis/genetics
- Neoplasm Metastasis
- Ovarian Follicle/drug effects
- Ovarian Follicle/growth & development
- Signal Transduction/drug effects
- Transplantation, Autologous/standards
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Affiliation(s)
- Lotte Eijkenboom
- Department of Obstetrics and Gynaecology, Radboud University Medical Centre, Nijmegen, The Netherlands.
| | - Callista Mulder
- Department of Reproductive Biology, Amsterdam University Medical Centre, University of Amsterdam, Amsterdam, The Netherlands
| | - Bert van der Reijden
- Department of Laboratory Medicine, Laboratory of Haematology, Radboud Institute of Molecular Life Sciences, Nijmegen, The Netherlands
| | - Norah van Mello
- Department of Obstetrics and Gynaecology, Amsterdam University Medical Centre, Vrije Universiteit, Amsterdam, The Netherlands
| | - Julia van Leersum
- Department of Obstetrics and Gynaecology, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Thessa Koorenhof-Scheele
- Department of Laboratory Medicine, Laboratory of Haematology, Radboud Institute of Molecular Life Sciences, Nijmegen, The Netherlands
| | - Didi Braat
- Department of Obstetrics and Gynaecology, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Catharina Beerendonk
- Department of Obstetrics and Gynaecology, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Ronald Peek
- Department of Obstetrics and Gynaecology, Radboud University Medical Centre, Nijmegen, The Netherlands
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12
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A Bioinformatics Model of Human Diseases on the Basis of Differentially Expressed Genes (of Domestic Versus Wild Animals) That Are Orthologs of Human Genes Associated with Reproductive-Potential Changes. Int J Mol Sci 2021; 22:ijms22052346. [PMID: 33652917 PMCID: PMC7956675 DOI: 10.3390/ijms22052346] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2020] [Revised: 02/13/2021] [Accepted: 02/23/2021] [Indexed: 12/18/2022] Open
Abstract
Earlier, after our bioinformatic analysis of single-nucleotide polymorphisms of TATA-binding protein-binding sites within gene promoters on the human Y chromosome, we suggested that human reproductive potential diminishes during self-domestication. Here, we implemented bioinformatics models of human diseases using animal in vivo genome-wide RNA-Seq data to compare the effect of co-directed changes in the expression of orthologous genes on human reproductive potential and during the divergence of domestic and wild animals from their nearest common ancestor (NCA). For example, serotonin receptor 3A (HTR3A) deficiency contributes to sudden death in pregnancy, consistently with Htr3a underexpression in guinea pigs (Cavia porcellus) during their divergence from their NCA with cavy (C. aperea). Overall, 25 and three differentially expressed genes (hereinafter, DEGs) in domestic animals versus 11 and 17 DEGs in wild animals show the direction consistent with human orthologous gene-markers of reduced and increased reproductive potential. This indicates a reliable association between DEGs in domestic animals and human orthologous genes reducing reproductive potential (Pearson’s χ2 test p < 0.001, Fisher’s exact test p < 0.05, binomial distribution p < 0.0001), whereas DEGs in wild animals uniformly match human orthologous genes decreasing and increasing human reproductive potential (p > 0.1; binomial distribution), thus enforcing the norm (wild type).
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13
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Kehoe S, Jewgenow K, Johnston PR, Mbedi S, Braun BC. Signalling pathways and mechanistic cues highlighted by transcriptomic analysis of primordial, primary, and secondary ovarian follicles in domestic cat. Sci Rep 2021; 11:2683. [PMID: 33514822 PMCID: PMC7846758 DOI: 10.1038/s41598-021-82051-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Accepted: 01/11/2021] [Indexed: 12/16/2022] Open
Abstract
In vitro growth (IVG) of dormant primordial ovarian follicles aims to produce mature competent oocytes for assisted reproduction. Success is dependent on optimal in vitro conditions complemented with an understanding of oocyte and ovarian follicle development in vivo. Complete IVG has not been achieved in any other mammalian species besides mice. Furthermore, ovarian folliculogenesis remains sparsely understood overall. Here, gene expression patterns were characterised by RNA-sequencing in primordial (PrF), primary (PF), and secondary (SF) ovarian follicles from Felis catus (domestic cat) ovaries. Two major transitions were investigated: PrF-PF and PF-SF. Transcriptional analysis revealed a higher proportion in gene expression changes during the PrF-PF transition. Key influencing factors during this transition included the interaction between the extracellular matrix (ECM) and matrix metalloproteinase (MMPs) along with nuclear components such as, histone HIST1H1T (H1.6). Conserved signalling factors and expression patterns previously described during mammalian ovarian folliculogenesis were observed. Species-specific features during domestic cat ovarian folliculogenesis were also found. The signalling pathway terms "PI3K-Akt", "transforming growth factor-β receptor", "ErbB", and "HIF-1" from the functional annotation analysis were studied. Some results highlighted mechanistic cues potentially involved in PrF development in the domestic cat. Overall, this study provides an insight into regulatory factors and pathways during preantral ovarian folliculogenesis in domestic cat.
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Affiliation(s)
- Shauna Kehoe
- Reproduction Biology Department, Leibniz Institute for Zoo and Wildlife Research, Alfred-Kowalke-Straße 17, 10315, Berlin, Germany.
| | - Katarina Jewgenow
- Reproduction Biology Department, Leibniz Institute for Zoo and Wildlife Research, Alfred-Kowalke-Straße 17, 10315, Berlin, Germany
| | - Paul R Johnston
- Berlin Center for Genomics in Biodiversity Research BeGenDiv, Königin-Luise-Straße 6-8, D-14195, Berlin, Germany
- Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Müggelseedamm 310, 12587, Berlin, Germany
- Freie Universität Berlin, Institut für Biologie, Königin-Luise-Straße 1-3, 14195, Berlin, Germany
| | - Susan Mbedi
- Berlin Center for Genomics in Biodiversity Research BeGenDiv, Königin-Luise-Straße 6-8, D-14195, Berlin, Germany
- Museum für Naturkunde, Invalidenstraße 43, 10115, Berlin, Germany
| | - Beate C Braun
- Reproduction Biology Department, Leibniz Institute for Zoo and Wildlife Research, Alfred-Kowalke-Straße 17, 10315, Berlin, Germany
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14
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Li J, Lu M, Zhang P, Hou E, Li T, Liu X, Xu X, Wang Z, Fan Y, Zhen X, Li R, Liu P, Yu Y, Hang J, Qiao J. Aberrant spliceosome expression and altered alternative splicing events correlate with maturation deficiency in human oocytes. Cell Cycle 2020; 19:2182-2194. [PMID: 32779509 PMCID: PMC7513853 DOI: 10.1080/15384101.2020.1799295] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Different strategies of ovarian stimulation are widely used in IVF to retrieve mature metaphase II (MII) oocytes for fertilization. On average, approximately 70% of recovered oocytes are mature, while personalized administration of hCG and/or GnRH agonist trigger and in vitro maturation (IVM) management can further improve the maturation rate. However, even under such conditions, a complete absence of oocyte maturation is still observed sporadically. The probable causes for such maturation-deficient (MD) oocytes - which arrest abnormally at metaphase I (MI) stage - are still under investigation. In the present study, using single-cell transcriptomic RNA sequencing (RNA-seq) and differential expression analysis, we showed that gene expression profiles were aberrant, and alternative splicing (AS) patterns were changed in MD oocytes when compared with normally mature (MN) oocytes. Gene ontology (GO) enrichment demonstrated that the differently expressed genes (DEGs) were mostly correlated with pre-mRNA splicing, RNA transportation, RNA processing, and mRNA regulation. Subsequently, analysis of AS events revealed that genes with altered AS patterns were primarily associated with metabolism and cell cycle. With these findings, we have demonstrated aberrant gene expression in complete maturation-deficient oocytes, and we propose that alterations in post-transcriptional regulation constitute a potential underlying mechanism governing oocyte maturation.
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Affiliation(s)
- Junsheng Li
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital , Beijing, China.,Key Laboratory of Assisted Reproduction, Ministry of Education , Beijing, China.,Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproduction , Beijing, China
| | - Minzhen Lu
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital , Beijing, China.,Key Laboratory of Assisted Reproduction, Ministry of Education , Beijing, China.,Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproduction , Beijing, China
| | - Puyao Zhang
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital , Beijing, China.,Key Laboratory of Assisted Reproduction, Ministry of Education , Beijing, China.,Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproduction , Beijing, China
| | - Entai Hou
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital , Beijing, China.,Key Laboratory of Assisted Reproduction, Ministry of Education , Beijing, China.,Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproduction , Beijing, China
| | - Tianjie Li
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital , Beijing, China.,Key Laboratory of Assisted Reproduction, Ministry of Education , Beijing, China.,Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproduction , Beijing, China
| | - Xian Liu
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences , Beijing, China
| | - Xiaofei Xu
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital , Beijing, China.,Key Laboratory of Assisted Reproduction, Ministry of Education , Beijing, China.,Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproduction , Beijing, China
| | - Zhaohui Wang
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences , Beijing, China
| | - Yong Fan
- Key Laboratory for Major Obstetric Diseases of Guangdong Province, The Third Affiliated Hospital of Guangzhou Medical University , Guangzhou, China
| | - Xiumei Zhen
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital , Beijing, China.,Key Laboratory of Assisted Reproduction, Ministry of Education , Beijing, China.,Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproduction , Beijing, China
| | - Rong Li
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital , Beijing, China.,Key Laboratory of Assisted Reproduction, Ministry of Education , Beijing, China.,Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproduction , Beijing, China
| | - Ping Liu
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital , Beijing, China.,Key Laboratory of Assisted Reproduction, Ministry of Education , Beijing, China.,Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproduction , Beijing, China
| | - Yang Yu
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital , Beijing, China.,Key Laboratory of Assisted Reproduction, Ministry of Education , Beijing, China.,Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproduction , Beijing, China
| | - Jing Hang
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital , Beijing, China.,Key Laboratory of Assisted Reproduction, Ministry of Education , Beijing, China.,Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproduction , Beijing, China
| | - Jie Qiao
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital , Beijing, China.,Key Laboratory of Assisted Reproduction, Ministry of Education , Beijing, China.,Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproduction , Beijing, China.,Peking-Tsinghua Center for Life Sciences, Peking University , Beijing, China
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15
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Zhao ZH, Meng TG, Li A, Schatten H, Wang ZB, Sun QY. RNA-Seq transcriptome reveals different molecular responses during human and mouse oocyte maturation and fertilization. BMC Genomics 2020; 21:475. [PMID: 32650721 PMCID: PMC7350670 DOI: 10.1186/s12864-020-06885-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Accepted: 07/06/2020] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Female infertility is a worldwide concern and the etiology of infertility has not been thoroughly demonstrated. Although the mouse is a good model system to perform functional studies, the differences between mouse and human also need to be considered. The objective of this study is to elucidate the different molecular mechanisms underlying oocyte maturation and fertilization between human and mouse. RESULTS A comparative transcriptome analysis was performed to identify the differentially expressed genes and associated biological processes between human and mouse oocytes. In total, 8513 common genes, as well as 15,165 and 6126 uniquely expressed genes were detected in human and mouse MII oocytes, respectively. Additionally, the ratios of non-homologous genes in human and mouse MII oocytes were 37 and 8%, respectively. Functional categorization analysis of the human MII non-homologous genes revealed that cAMP-mediated signaling, sister chromatid cohesin, and cell recognition were the major enriched biological processes. Interestingly, we couldn't detect any GO categories in mouse non-homologous genes. CONCLUSIONS This study demonstrates that human and mouse oocytes exhibit significant differences in gene expression profiles during oocyte maturation, which probably deciphers the differential molecular responses to oocyte maturation and fertilization. The significant differences between human and mouse oocytes limit the generalizations from mouse to human oocyte maturation. Knowledge about the limitations of animal models is crucial when exploring a complex process such as human oocyte maturation and fertilization.
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Affiliation(s)
- Zheng-Hui Zhao
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Tie-Gang Meng
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China.,Fertility Preservation Lab, Reproductive Medicine Center, Guangdong Second Provincial General Hospital, Guangzhou, 510317, China
| | - Ang Li
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Heide Schatten
- Department of Veterinary Pathobiology, University of Missouri, Columbia, MO, 65211, USA
| | - Zhen-Bo Wang
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China. .,University of Chinese Academy of Sciences, Beijing, China.
| | - Qing-Yuan Sun
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China. .,Fertility Preservation Lab, Reproductive Medicine Center, Guangdong Second Provincial General Hospital, Guangzhou, 510317, China.
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16
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Impact of nicotine, alcohol, and cocaine exposure on germline integrity and epigenome. Neuropharmacology 2020; 173:108127. [PMID: 32413368 DOI: 10.1016/j.neuropharm.2020.108127] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 04/29/2020] [Accepted: 04/30/2020] [Indexed: 12/19/2022]
Abstract
Converging evidence suggests that parental exposure to drugs of abuse can affect offspring phenotypes. The impacts of drug abuse on germ cell quality may mediate multigenerational and transgenerational inheritance, although biological pathways underlying this mode of inheritance are not yet characterized. Germline epigenetic marks are modified by drug exposure and have emerged as promising mechanistic candidates in recent work. Drug exposure also impacts overall germline integrity and reproductive functioning, although the role of these consequences in multi/transgenerational inheritance is unclear. This review synthesizes literature on effects of exposure to alcohol, cocaine, and nicotine on the germline with a focus on epigenetic modifications following drug exposure and broader impacts on germline integrity and reproductive functioning. We discuss potential interactions between reproductive functioning, germline integrity, and germline epigenome/transcriptome in pathways underlying multi/transgenerational inheritance. We find that existing data may support independent or interactive contributions of these germline impacts on offspring phenotypes in a manner that may mediate multi/transgenerational inheritance.
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17
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Kashir J. Increasing associations between defects in phospholipase C zeta and conditions of male infertility: not just ICSI failure? J Assist Reprod Genet 2020; 37:1273-1293. [PMID: 32285298 PMCID: PMC7311621 DOI: 10.1007/s10815-020-01748-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Accepted: 03/12/2020] [Indexed: 12/12/2022] Open
Abstract
PURPOSE Oocyte activation is a fundamental event at mammalian fertilization. In mammals, this process is initiated by a series of characteristic calcium (Ca2+) oscillations, induced by a sperm-specific phospholipase C (PLC) termed PLCzeta (PLCζ). Dysfunction/reduction/deletion of PLCζ is associated with forms of male infertility where the sperm is unable to initiate Ca2+ oscillations and oocyte activation, specifically in cases of fertilization failure. This review article aims to systematically summarize recent advancements and controversies in the field to update expanding clinical associations between PLCζ and various male factor conditions. This article also discusses how such associations may potentially underlie defective embryogenesis and recurrent implantation failure following fertility treatments, alongside potential diagnostic and therapeutic PLCζ approaches, aiming to direct future research efforts to utilize such knowledge clinically. METHODS An extensive literature search was performed using literature databases (PubMed/MEDLINE/Web of Knowledge) focusing on phospholipase C zeta (PLCzeta; PLCζ), oocyte activation, and calcium oscillations, as well as specific male factor conditions. RESULTS AND DISCUSSION Defective PLCζ or PLCζ-induced Ca2+ release can be linked to multiple forms of male infertility including abnormal sperm parameters and morphology, sperm DNA fragmentation and oxidation, and abnormal embryogenesis/pregnancies. Such sperm exhibit absent/reduced levels, and abnormal localization patterns of PLCζ within the sperm head. CONCLUSIONS Defective PLCζ and abnormal patterns of Ca2+ release are increasingly suspected a significant causative factor underlying abnormalities or insufficiencies in Ca2+ oscillation-driven early embryogenic events. Such cases could potentially strongly benefit from relevant therapeutic and diagnostic applications of PLCζ, or even alternative mechanisms, following further focused research efforts.
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Affiliation(s)
- Junaid Kashir
- College of Medicine, Alfaisal University, Riyadh, Kingdom of Saudi Arabia. .,School of Biosciences, Cardiff University, Cardiff, UK. .,Department of Comparative Medicine, King Faisal Specialist Hospital and Research Center, Riyadh, Kingdom of Saudi Arabia.
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18
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Luteinizing Hormone Action in Human Oocyte Maturation and Quality: Signaling Pathways, Regulation, and Clinical Impact. Reprod Sci 2020; 27:1223-1252. [PMID: 32046451 PMCID: PMC7190682 DOI: 10.1007/s43032-019-00137-x] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Accepted: 10/14/2019] [Indexed: 12/18/2022]
Abstract
The ovarian follicle luteinizing hormone (LH) signaling molecules that regulate oocyte meiotic maturation have recently been identified. The LH signal reduces preovulatory follicle cyclic nucleotide levels which releases oocytes from the first meiotic arrest. In the ovarian follicle, the LH signal reduces cyclic nucleotide levels via the CNP/NPR2 system, the EGF/EGF receptor network, and follicle/oocyte gap junctions. In the oocyte, reduced cyclic nucleotide levels activate the maturation promoting factor (MPF). The activated MPF induces chromosome segregation and completion of the first and second meiotic divisions. The purpose of this paper is to present an overview of the current understanding of human LH signaling regulation of oocyte meiotic maturation by identifying and integrating the human studies on this topic. We found 89 human studies in the literature that identified 24 LH follicle/oocyte signaling proteins. These studies show that human oocyte meiotic maturation is regulated by the same proteins that regulate animal oocyte meiotic maturation. We also found that these LH signaling pathway molecules regulate human oocyte quality and subsequent embryo quality. Remarkably, in vitro maturation (IVM) prematuration culture (PMC) protocols that manipulate the LH signaling pathway improve human oocyte quality of cultured human oocytes. This knowledge has improved clinical human IVM efficiency which may become a routine alternative ART for some infertile patients.
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19
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Eisa AA, De S, Detwiler A, Gilker E, Ignatious AC, Vijayaraghavan S, Kline D. YWHA (14-3-3) protein isoforms and their interactions with CDC25B phosphatase in mouse oogenesis and oocyte maturation. BMC DEVELOPMENTAL BIOLOGY 2019; 19:20. [PMID: 31640562 PMCID: PMC6805688 DOI: 10.1186/s12861-019-0200-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Accepted: 09/13/2019] [Indexed: 12/21/2022]
Abstract
Background Immature mammalian oocytes are held arrested at prophase I of meiosis by an inhibitory phosphorylation of cyclin-dependent kinase 1 (CDK1). Release from this meiotic arrest and germinal vesicle breakdown is dependent on dephosphorylation of CDK1 by the protein, cell cycle division 25B (CDC25B). Evidence suggests that phosphorylated CDC25B is bound to YWHA (14-3-3) proteins in the cytoplasm of immature oocytes and is thus maintained in an inactive form. The importance of YWHA in meiosis demands additional studies. Results Messenger RNA for multiple isoforms of the YWHA protein family was detected in mouse oocytes and eggs. All seven mammalian YWHA isoforms previously reported to be expressed in mouse oocytes, were found to interact with CDC25B as evidenced by in situ proximity ligation assays. Interaction of YWHAH with CDC25B was indicated by Förster Resonance Energy Transfer (FRET) microscopy. Intracytoplasmic microinjection of oocytes with R18, a known, synthetic, non-isoform-specific, YWHA-blocking peptide promoted germinal vesicle breakdown. This suggests that inhibiting the interactions between YWHA proteins and their binding partners releases the oocyte from meiotic arrest. Microinjection of isoform-specific, translation-blocking morpholino oligonucleotides to knockdown or downregulate YWHA protein synthesis in oocytes suggested a role for a specific YWHA isoform in maintaining the meiotic arrest. More definitively however, and in contrast to the knockdown experiments, oocyte-specific and global deletion of two isoforms of YWHA, YWHAH (14-3-3 eta) or YWHAE (14-3-3 epsilon) indicated that the complete absence of either or both isoforms does not alter oocyte development and release from the meiotic prophase I arrest. Conclusions Multiple isoforms of the YWHA protein are expressed in mouse oocytes and eggs and interact with the cell cycle protein CDC25B, but YWHAH and YWHAE isoforms are not essential for normal mouse oocyte maturation, fertilization and early embryonic development.
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Affiliation(s)
- Alaa A Eisa
- School of Biomedical Sciences, Kent State University, Kent, OH, 22422, USA
| | - Santanu De
- Department of Biological Sciences, Nova Southeastern University, Fort Lauderdale, FL, 33314, USA
| | - Ariana Detwiler
- Department of Environmental and Occupational Health, University of Pittsburgh Graduate School of Public Health, UPMC Hillman Cancer Center, Pittsburgh, PA, 15213, USA
| | - Eva Gilker
- Department of Physiology and Biophysics, Case Western Reserve University School of Medicine, Cleveland, OH, 44106, USA
| | | | | | - Douglas Kline
- Department of Biological Sciences, Kent State University, Kent, OH, 44242, USA.
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20
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Yang F, Wang M, Zhang B, Xiang W, Zhang K, Chu M, Wang P. Identification of new progestogen-associated networks in mammalian ovulation using bioinformatics. BMC SYSTEMS BIOLOGY 2018; 12:36. [PMID: 29615037 PMCID: PMC5883354 DOI: 10.1186/s12918-018-0577-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Accepted: 03/27/2018] [Indexed: 12/28/2022]
Abstract
Background Progesterone plays an essential role in mammalian ovulation. Although much is known about this process, the gene networks involved in ovulation have yet to be established. When analyze the mechanisms of ovulation, we often need to determine key genes or pathways to investigate the reproduction features. However, traditional experimental methods have a number of limitations. Results Data, in this study, were acquired from GSE41836 and GSE54584 which provided different samples. They were analyzed with the GEO2R and 546 differentially expressed genes were obtained from two data sets using bioinformatics (absolute log2 FC > 1, P < 0.05). This study identified four genes (PGR, RELN, PDE10A and PLA2G4A) by protein-protein interaction networks and pathway analysis, and their functional enrichments were associated with ovulation. Then, the top 25 statistical pathway enrichments related to hCG treatment were analyzed. Furthermore, gene network analysis identified certain interconnected genes and pathways involved in progestogenic mechanisms, including progesterone-mediated oocyte maturation, the MAPK signaling pathway, the GnRH signaling pathway and focal adhesion, etc. Moreover, we explored the four target gene pathways. q-PCR analysis following hCG and RU486 treatments confirmed the certain novel progestogenic-associated genes (GNAI1, PRKCA, CAV1, EGFR, RHOA, ZYX, VCL, GRB2 and RAP1A). Conclusions The results suggested four key genes, nine predicted genes and eight pathways to be involved in progestogenic networks. These networks provide important regulatory genes and signaling pathways which are involved in ovulation. This study provides a fundamental basis for subsequent functional studies to investigate the regulation of mammalian ovulation. Electronic supplementary material The online version of this article (10.1186/s12918-018-0577-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Fang Yang
- College of Bioengineering, Chongqing University, Chongqing, 400030, China.,Medical Molecular Biology Research Center, School of Basic Medical Sciences, Southwest Medical University, Luzhou, Sichuan, 646000, China
| | - Meng Wang
- College of Bioengineering, Chongqing University, Chongqing, 400030, China
| | - Baoyun Zhang
- College of Bioengineering, Chongqing University, Chongqing, 400030, China
| | - Wei Xiang
- College of Bioengineering, Chongqing University, Chongqing, 400030, China
| | - Ke Zhang
- College of Bioengineering, Chongqing University, Chongqing, 400030, China
| | - Mingxin Chu
- Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation of Ministry of Agriculture, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Pingqing Wang
- College of Bioengineering, Chongqing University, Chongqing, 400030, China.
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21
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Putative germline and pluripotent stem cells in adult mouse ovary and their in vitro differentiation potential into oocyte-like and somatic cells. ZYGOTE 2017; 25:358-375. [PMID: 28669362 DOI: 10.1017/s0967199417000235] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
According to classical knowledge of reproductive biology, in the ovary of female mammals there is a limited number of oocytes and there is no possibility of renewal if the oocytes are lost due to disease or injury. However, in recent years, the results of some studies on renewal and formation of oocytes and follicles in the adult mammalian ovary have led to the questioning of this opinion. The aim of our study is to demonstrate the presence of putative germline and pluripotent stem cells in the adult mouse ovary and their differentiation potential into germ and somatic cells. In ovary tissues and cells harvested from pre-differentiation step, the expression of pluripotent and germline stem cell markers was analysed by reverse transcription-polymerase chain reaction (RT-PCR), immunofluorescence staining and western blotting. Embryoid bodies that formed in this step were analysed using immunofluorescence staining and transmission electron microscopy. Ovarian stem cells were induced to differentiate into oocyte, osteoblast, chondrocyte and neural cells. Besides morphological observation, differentiated cells were analysed by RT-PCR, histochemical and immunofluorescence staining. Expression of germline and pluripotent stem cell markers both in mRNA and at the protein level were detected in the pre-differentiated cells and ovary tissues. As a result of the differentiation process, the formation of oocyte-like cells, osteoblasts, chondrocytes and neural cells was observed and characteristics of differentiated cells were confirmed using the methods mentioned above. Our study results revealed that the adult mouse ovary contains germline and pluripotent stem cells with the capacity to differentiate into oocyte-like cells, osteoblasts, chondrocytes and neural cells.
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22
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In vitro differentiation of human embryonic stem cells into ovarian follicle-like cells. Nat Commun 2017; 8:15680. [PMID: 28604658 PMCID: PMC5472783 DOI: 10.1038/ncomms15680] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2016] [Accepted: 04/19/2017] [Indexed: 12/20/2022] Open
Abstract
Understanding the unique mechanisms of human oogenesis necessitates the development of an in vitro system of stem cell differentiation into oocytes. Specialized cell types and organoids have been derived from human pluripotent stem cells in vitro, but generating a human ovarian follicle remains a challenge. Here we report that human embryonic stem cells can be induced to differentiate into ovarian follicle-like cells (FLCs) in vitro. First, we find that two RNA-binding proteins specifically expressed in germ cells, DAZL and BOULE, regulate the exit from pluripotency and entry into meiosis. By expressing DAZL and BOULE with recombinant human GDF9 and BMP15, these meiotic germ cells are further induced to form ovarian FLCs, including oocytes and granulosa cells. This robust in vitro differentiation system will allow the study of the unique molecular mechanisms underlying human pluripotent stem cell differentiation into late primordial germ cells, meiotic germ cells and ovarian follicles.
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23
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Yeste M, Jones C, Amdani SN, Coward K. Oocyte Activation and Fertilisation: Crucial Contributors from the Sperm and Oocyte. Results Probl Cell Differ 2017; 59:213-239. [PMID: 28247051 DOI: 10.1007/978-3-319-44820-6_8] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
This chapter intends to summarise the importance of sperm- and oocyte-derived factors in the processes of sperm-oocyte binding and oocyte activation. First, we describe the initial interaction between sperm and the zona pellucida, with particular regard to acrosome exocytosis. We then describe how sperm and oocyte membranes fuse, with special reference to the discovery of the sperm protein IZUMO1 and its interaction with the oocyte membrane receptor JUNO. We then focus specifically upon oocyte activation, the fundamental process by which the oocyte is alleviated from metaphase II arrest by a sperm-soluble factor. The identity of this sperm factor has been the source of much debate recently, although mounting evidence, from several different laboratories, provides strong support for phospholipase C ζ (PLCζ), a sperm-specific phospholipase. Herein, we discuss the evidence in support of PLCζ and evaluate the potential role of other candidate proteins, such as post-acrosomal WW-binding domain protein (PAWP/WBP2NL). Since the cascade of downstream events triggered by the sperm-borne oocyte activation factor heavily relies upon specialised cellular machinery within the oocyte, we also discuss the critical role of oocyte-borne factors, such as the inositol trisphosphate receptor (IP3R), protein kinase C (PKC), store-operated calcium entry (SOCE) and calcium/calmodulin-dependent protein kinase II (CaMKII), during the process of oocyte activation. In order to place the implications of these various factors and processes into a clinical context, we proceed to describe their potential association with oocyte activation failure and discuss how clinical techniques such as the in vitro maturation of oocytes may affect oocyte activation ability. Finally, we contemplate the role of artificial oocyte activating agents in the clinical rescue of oocyte activation deficiency and discuss options for more endogenous alternatives.
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Affiliation(s)
- Marc Yeste
- Unit of Cell Biology, Department of Biology, Faculty of Sciences, University of Girona, C/ Maria Aurèlia Campany, 69, Campus Montilivi, E-17071, Girona, Spain. .,Nuffield Department of Obstetrics and Gynaecology, University of Oxford, Level 3, Women's Centre, John Radcliffe Hospital, Headington, Oxford, UK.
| | - Celine Jones
- Nuffield Department of Obstetrics and Gynaecology, University of Oxford, Level 3, Women's Centre, John Radcliffe Hospital, Headington, Oxford, UK
| | - Siti Nornadhirah Amdani
- Nuffield Department of Obstetrics and Gynaecology, University of Oxford, Level 3, Women's Centre, John Radcliffe Hospital, Headington, Oxford, UK
| | - Kevin Coward
- Nuffield Department of Obstetrics and Gynaecology, University of Oxford, Level 3, Women's Centre, John Radcliffe Hospital, Headington, Oxford, UK
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24
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Early human embryos are naturally aneuploid-can that be corrected? J Assist Reprod Genet 2016; 34:15-21. [PMID: 27900612 PMCID: PMC5330987 DOI: 10.1007/s10815-016-0845-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Accepted: 11/14/2016] [Indexed: 11/16/2022] Open
Abstract
Aneuploidy is common and may be a natural occurrence in early human embryos. Selecting against embryos containing aneuploid cells for embryo transfer has been reported to increase clinical pregnancies per transfer in some studies, but not others. Some aneuploidy is due to misallocation of chromosomes during meiosis, in either the egg or sperm, but most aneuploidy is due to misallocation of chromosomes during mitoses after fertilization. Big questions are as follows: Why does this happen? How much aneuploidy in a preimplantation embryo is compatible with normal fetal development? Is aneuploidy increased by in vitro culture, and/or could it be prevented or corrected in the IVF lab?
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25
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Kordus RJ, LaVoie HA. Granulosa cell biomarkers to predict pregnancy in ART: pieces to solve the puzzle. Reproduction 2016; 153:R69-R83. [PMID: 27815559 DOI: 10.1530/rep-16-0500] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2016] [Revised: 10/31/2016] [Accepted: 11/04/2016] [Indexed: 12/12/2022]
Abstract
Cumulus and mural granulosa cells of the ovarian follicle surround and interact with the developing oocyte. These follicular cells reflect the oocyte's overall health and may indicate subsequent developmental competence of embryos. Biomarkers of granulosa cells associated with individual oocytes could potentially be used in assisted reproduction to indicate which embryos have the best chance of implanting in the uterus and completing gestation. In this review, we have performed a comprehensive assessment of the recent literature for human cumulus and mural granulosa cell mRNA biomarkers as they relate to pregnancy and live birth. A critical discussion of variables affecting granulosa gene expression profiles for in vitro fertilization patients, including patient demographics and ovarian stimulation regimens, is presented. Although studies with microarray data were evaluated, this synopsis focuses on expressed genes that have been validated by quantitative RT-PCR. Furthermore, we summarize the current published data that support or refute identified granulosa expressed genes as potential biomarkers of embryos that give rise to ongoing pregnancy and live birth. Finally, we review studies that offer predictive models for embryo selection for uterine transfer based on biomarkers that show differential gene expression.
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Affiliation(s)
- Richard J Kordus
- Department of Cell Biology and AnatomyUniversity of South Carolina School of Medicine, Columbia, South Carolina, USA
| | - Holly A LaVoie
- Department of Cell Biology and AnatomyUniversity of South Carolina School of Medicine, Columbia, South Carolina, USA
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26
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Gupta A, Tiwari M, Prasad S, Chaube SK. Role of Cyclic Nucleotide Phosphodiesterases During Meiotic Resumption From Diplotene Arrest in Mammalian Oocytes. J Cell Biochem 2016; 118:446-452. [PMID: 27662514 DOI: 10.1002/jcb.25748] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Accepted: 09/22/2016] [Indexed: 01/09/2023]
Abstract
Cyclic nucleotide phosphodiesterases (PDEs) are group of enzymes that hydrolyze cyclic nucleotides in wide variety of cell types including encircling granulosa cells as well as associated oocytes. One group of PDEs are located in encircling granulosa cells and another group get expressed in the oocyte, while few other PDEs are expressed in both compartments. The PDE1A, PDE4D, PDE5A, PDE8A, and PDE8B are granulosa cell specific PDEs that hydrolyze adenosine 3',5'-cyclic monophosphate (cAMP) as well as guanosine 3',5'-cyclic monophosphate (cGMP) with different affinities. PDE3A, PDE8A as well as PDE9A are expressed in oocyte and specifically responsible for the cyclic nucleotide hydrolysis in the oocyte itself. Few other PDEs such as PDE7B, PDE10A, and PDE11A are either detected in granulosa cells or oocytes. Activation of these PDEs either in encircling granulosa cells or in oocyte directly or indirectly reduces intraoocyte cAMP level. Reduction of intraoocyte cAMP level modulates phosphorylation status of cyclin-dependent kinase 1 (Cdk1) and triggers cyclin B1 degradation that destabilizes maturation promoting factor (MPF) and/or increases Cdk1 activity. The destabilized MPF and/or increased Cdk1 activity leads to resumption of meiosis, which initiates the achievement of meiotic competency in preovulatory follicles of several mammalian species. Use of specific PDEs inhibitors block cyclic nucleotides hydrolysis that results in increase of intraoocyte cyclic nucleotides level, which leads to maintenance of meiotic arrest at diplotene stage in vivo as well as in vitro. Thus, cyclic nucleotide PDEs play important role in the achievement of meiotic competency by reducing intraoocyte cyclic nucleotides level in mammalian oocytes. J. Cell. Biochem. 118: 446-452, 2017. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Anumegha Gupta
- Cell Physiology Laboratory, Department of Zoology, Institute of Science, Banaras Hindu University, Varanasi-221005, Uttar Pradesh, India
| | - Meenakshi Tiwari
- Cell Physiology Laboratory, Department of Zoology, Institute of Science, Banaras Hindu University, Varanasi-221005, Uttar Pradesh, India
| | - Shilpa Prasad
- Cell Physiology Laboratory, Department of Zoology, Institute of Science, Banaras Hindu University, Varanasi-221005, Uttar Pradesh, India
| | - Shail K Chaube
- Cell Physiology Laboratory, Department of Zoology, Institute of Science, Banaras Hindu University, Varanasi-221005, Uttar Pradesh, India
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27
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Anesetti G, Chávez-Genaro R. Ovarian follicular dynamics after aromatizable or non aromatizable neonatal androgenization. J Mol Histol 2016; 47:491-501. [PMID: 27541036 DOI: 10.1007/s10735-016-9692-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Accepted: 08/10/2016] [Indexed: 11/29/2022]
Affiliation(s)
- Gabriel Anesetti
- Histology and Embryology Department, School of Medicine, General Flores 2125, CP 11800, Montevideo, Uruguay.
| | - Rebeca Chávez-Genaro
- Histology and Embryology Department, School of Medicine, General Flores 2125, CP 11800, Montevideo, Uruguay
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28
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Chen WW, Yi YH, Chien CH, Hsiung KC, Ma TH, Lin YC, Lo SJ, Chang TC. Specific polyunsaturated fatty acids modulate lipid delivery and oocyte development in C. elegans revealed by molecular-selective label-free imaging. Sci Rep 2016; 6:32021. [PMID: 27535493 PMCID: PMC4989181 DOI: 10.1038/srep32021] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Accepted: 08/01/2016] [Indexed: 12/12/2022] Open
Abstract
Polyunsaturated fatty acids (PUFAs) exhibit critical functions in biological systems and their importance during animal oocyte maturation has been increasingly recognized. However, the detailed mechanism of lipid transportation for oocyte development remains largely unknown. In this study, the transportation of yolk lipoprotein (lipid carrier) and the rate of lipid delivery into oocytes in live C. elegans were examined for the first time by using coherent anti-Stokes Raman scattering (CARS) microscopy. The accumulation of secreted yolk lipoprotein in the pseudocoelom of live C. elegans can be detected by CARS microscopy at both protein (~1665 cm−1) and lipid (~2845 cm−1) Raman bands. In addition, an image analysis protocol was established to quantitatively measure the levels of secreted yolk lipoprotein aberrantly accumulated in PUFA-deficient fat mutants (fat-1, fat-2, fat-3, fat-4) and PUFA-supplemented fat-2 worms (the PUFA add-back experiments). Our results revealed that the omega-6 PUFAs, not omega-3 PUFAs, play a critical role in modulating lipid/yolk level in the oocytes and regulating reproductive efficiency of C. elegans. This work demonstrates the value of using CARS microscopy as a molecular-selective label-free imaging technique for the study of PUFA regulation and oocyte development in C. elegans.
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Affiliation(s)
- Wei-Wen Chen
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 106, Taiwan.,Molecular Science and Technology Program, Taiwan International Graduate Program, Academia Sinica, Taipei 106, Taiwan.,Department of Chemistry, National Tsing Hua University, Hsinchu 300, Taiwan
| | - Yung-Hsiang Yi
- Center of Molecular Medicine, College of Medicine, Chang Gung University, Kwei-Shan, Tao-Yuan 333, Taiwan.,Department of Biomedical Sciences, College of Medicine, Chang Gung University, Kwei-Shan, Tao-Yuan 333, Taiwan
| | - Cheng-Hao Chien
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 106, Taiwan
| | - Kuei-Ching Hsiung
- Department of Biomedical Sciences, College of Medicine, Chang Gung University, Kwei-Shan, Tao-Yuan 333, Taiwan
| | - Tian-Hsiang Ma
- Department of Biomedical Sciences, College of Medicine, Chang Gung University, Kwei-Shan, Tao-Yuan 333, Taiwan
| | - Yi-Chun Lin
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 106, Taiwan
| | - Szecheng J Lo
- Center of Molecular Medicine, College of Medicine, Chang Gung University, Kwei-Shan, Tao-Yuan 333, Taiwan.,Department of Biomedical Sciences, College of Medicine, Chang Gung University, Kwei-Shan, Tao-Yuan 333, Taiwan
| | - Ta-Chau Chang
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 106, Taiwan.,Molecular Science and Technology Program, Taiwan International Graduate Program, Academia Sinica, Taipei 106, Taiwan
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29
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Lea RG, Amezaga MR, Loup B, Mandon-Pépin B, Stefansdottir A, Filis P, Kyle C, Zhang Z, Allen C, Purdie L, Jouneau L, Cotinot C, Rhind SM, Sinclair KD, Fowler PA. The fetal ovary exhibits temporal sensitivity to a 'real-life' mixture of environmental chemicals. Sci Rep 2016; 6:22279. [PMID: 26931299 PMCID: PMC4773987 DOI: 10.1038/srep22279] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2015] [Accepted: 02/10/2016] [Indexed: 01/09/2023] Open
Abstract
The development of fetal ovarian follicles is a critical determinant of adult female reproductive competence. Prolonged exposure to environmental chemicals (ECs) can perturb this process with detrimental consequences for offspring. Here we report on the exposure of pregnant ewes to an environmental mixture of ECs derived from pastures fertilized with sewage sludge (biosolids): a common global agricultural practice. Exposure of pregnant ewes to ECs over 80 day periods during early, mid or late gestation reduced the proportion of healthy early stage fetal follicles comprising the ovarian reserve. Mid and late gestation EC exposures had the most marked effects, disturbing maternal and fetal liver chemical profiles, masculinising fetal anogenital distance and greatly increasing the number of altered fetal ovarian genes and proteins. In conclusion, differential temporal sensitivity of the fetus and its ovaries to EC mixtures has implications for adult ovarian function following adverse exposures during pregnancy.
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Affiliation(s)
- Richard G Lea
- Schools of Veterinary Medicine and Biosciences, University of Nottingham, Leicestershire, LE12 5RD, UK
| | - Maria R Amezaga
- Institute of Medical Sciences, School of Medicine, Medical Sciences &Nutrition, University of Aberdeen, Foresterhill, Aberdeen, AB25 2ZD, UK
| | - Benoit Loup
- UMR BDR, INRA, Université Paris Saclay, 78350, Jouy-en-Josas, France
| | | | - Agnes Stefansdottir
- Institute of Medical Sciences, School of Medicine, Medical Sciences &Nutrition, University of Aberdeen, Foresterhill, Aberdeen, AB25 2ZD, UK
| | - Panagiotis Filis
- Institute of Medical Sciences, School of Medicine, Medical Sciences &Nutrition, University of Aberdeen, Foresterhill, Aberdeen, AB25 2ZD, UK
| | - Carol Kyle
- The James Hutton Institute, Craigiebuckler, Aberdeen, AB15 8QH, UK
| | - Zulin Zhang
- The James Hutton Institute, Craigiebuckler, Aberdeen, AB15 8QH, UK
| | - Ceri Allen
- Schools of Veterinary Medicine and Biosciences, University of Nottingham, Leicestershire, LE12 5RD, UK
| | - Laura Purdie
- Schools of Veterinary Medicine and Biosciences, University of Nottingham, Leicestershire, LE12 5RD, UK
| | - Luc Jouneau
- UMR BDR, INRA, Université Paris Saclay, 78350, Jouy-en-Josas, France
| | - Corinne Cotinot
- UMR BDR, INRA, Université Paris Saclay, 78350, Jouy-en-Josas, France
| | - Stewart M Rhind
- The James Hutton Institute, Craigiebuckler, Aberdeen, AB15 8QH, UK
| | - Kevin D Sinclair
- Schools of Veterinary Medicine and Biosciences, University of Nottingham, Leicestershire, LE12 5RD, UK
| | - Paul A Fowler
- Institute of Medical Sciences, School of Medicine, Medical Sciences &Nutrition, University of Aberdeen, Foresterhill, Aberdeen, AB25 2ZD, UK
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30
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Tob1 is expressed in developing and adult gonads and is associated with the P-body marker, Dcp2. Cell Tissue Res 2015; 364:443-51. [DOI: 10.1007/s00441-015-2328-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Accepted: 11/06/2015] [Indexed: 12/26/2022]
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31
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Yeste M, Jones C, Amdani SN, Patel S, Coward K. Oocyte activation deficiency: a role for an oocyte contribution? Hum Reprod Update 2015; 22:23-47. [DOI: 10.1093/humupd/dmv040] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Accepted: 08/13/2015] [Indexed: 12/11/2022] Open
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32
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Petersen TS, Kristensen SG, Jeppesen JV, Grøndahl ML, Wissing ML, Macklon KT, Andersen CY. Distribution and function of 3',5'-Cyclic-AMP phosphodiesterases in the human ovary. Mol Cell Endocrinol 2015; 403:10-20. [PMID: 25578602 DOI: 10.1016/j.mce.2015.01.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Revised: 01/03/2015] [Accepted: 01/05/2015] [Indexed: 12/29/2022]
Abstract
The concentration of the important second messenger cAMP is regulated by phosphodiesterases (PDEs) and hence an attractive drug target. However, limited human data are available about the PDEs in the ovary. The aim of the present study was to describe and characterise the PDEs in the human ovary. Results were obtained by analysis of mRNA microarray data from follicles and granulosa cells (GCs), combined RT-PCR and enzymatic activity analysis in GCs, immunohistochemical analysis of ovarian sections and by studying the effect of PDE inhibitors on progesterone production from cultured GCs. We found that PDE3, PDE4, PDE7 and PDE8 are the major families present while PDE11A was not detected. PDE8B was differentially expressed during folliculogenesis. In cultured GCs, inhibition of PDE7 and PDE8 increased basal progesterone secretion while PDE4 inhibition increased forskolin-stimulated progesterone secretion. In conclusion, we identified PDE3, PDE4, PDE7 and PDE8 as the major PDEs in the human ovary.
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Affiliation(s)
- T S Petersen
- Laboratory of Reproductive Biology, The Juliane Marie Centre for Women, Children, and Reproduction - Copenhagen University Hospital, Copenhagen University, Copenhagen 2100, Denmark; Medical Department, LEO Pharma, Ballerup 2750, Denmark.
| | - S G Kristensen
- Laboratory of Reproductive Biology, The Juliane Marie Centre for Women, Children, and Reproduction - Copenhagen University Hospital, Copenhagen University, Copenhagen 2100, Denmark
| | - J V Jeppesen
- Laboratory of Reproductive Biology, The Juliane Marie Centre for Women, Children, and Reproduction - Copenhagen University Hospital, Copenhagen University, Copenhagen 2100, Denmark
| | - M L Grøndahl
- The Fertility Clinic, Herlev Hospital, Copenhagen University Hospital, Copenhagen University, Herlev 2730, Denmark
| | - M L Wissing
- The Fertility Clinic, Holbæk Sygehus, Holbæk 4300, Denmark
| | - K T Macklon
- The Fertility Clinic, The Juliane Marie Centre for Women, Children, and Reproduction - Copenhagen University Hospital, Copenhagen University, Copenhagen 2100, Denmark
| | - C Y Andersen
- Laboratory of Reproductive Biology, The Juliane Marie Centre for Women, Children, and Reproduction - Copenhagen University Hospital, Copenhagen University, Copenhagen 2100, Denmark
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33
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van Montfoort AP, Plösch T, Hoek A, Tietge UJ. Impact of maternal cholesterol metabolism on ovarian follicle development and fertility. J Reprod Immunol 2014; 104-105:32-6. [DOI: 10.1016/j.jri.2014.04.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2013] [Revised: 04/02/2014] [Accepted: 04/16/2014] [Indexed: 01/24/2023]
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34
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Condic ML. Totipotency: what it is and what it is not. Stem Cells Dev 2014; 23:796-812. [PMID: 24368070 PMCID: PMC3991987 DOI: 10.1089/scd.2013.0364] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2013] [Accepted: 12/23/2013] [Indexed: 02/03/2023] Open
Abstract
There is surprising confusion surrounding the concept of biological totipotency, both within the scientific community and in society at large. Increasingly, ethical objections to scientific research have both practical and political implications. Ethical controversy surrounding an area of research can have a chilling effect on investors and industry, which in turn slows the development of novel medical therapies. In this context, clarifying precisely what is meant by "totipotency" and how it is experimentally determined will both avoid unnecessary controversy and potentially reduce inappropriate barriers to research. Here, the concept of totipotency is discussed, and the confusions surrounding this term in the scientific and nonscientific literature are considered. A new term, "plenipotent," is proposed to resolve this confusion. The requirement for specific, oocyte-derived cytoplasm as a component of totipotency is outlined. Finally, the implications of twinning for our understanding of totipotency are discussed.
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Affiliation(s)
- Maureen L Condic
- Department of Neurobiology, School of Medicine, University of Utah , Salt Lake City, Utah
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35
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Wissing ML, Kristensen SG, Andersen CY, Mikkelsen AL, Høst T, Borup R, Grøndahl ML. Identification of new ovulation-related genes in humans by comparing the transcriptome of granulosa cells before and after ovulation triggering in the same controlled ovarian stimulation cycle. Hum Reprod 2014; 29:997-1010. [PMID: 24510971 DOI: 10.1093/humrep/deu008] [Citation(s) in RCA: 106] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
STUDY QUESTION Which genes and molecular mechanisms are involved in the human ovulatory cascade and final oocyte maturation? SUMMARY ANSWER Up-regulated genes in granulosa cells (GC) represented inflammation, angiogenesis, extracellular matrix, growth factors and genes previously associated with ovarian cancer, while down-regulated genes mainly represented cell cycle and proliferation. WHAT IS KNOWN ALREADY Radical changes occur in the follicle during final follicle maturation after the ovulatory trigger: these range from ensuring an optimal milieu for the oocyte in meiotic arrest to the release of a mature oocyte and remodeling into a corpus luteum. A wide range of mediators of final follicle maturation has been identified in rodents, non-human primates and cows. STUDY DESIGN, SIZE, DURATION Prospective cohort study including 24 women undergoing ovarian stimulation with the long gonadotrophin-releasing hormone agonist protocol during 2010-2012 at Holbæk Fertility Clinic. Nine paired samples of GC and 24 paired samples of follicular fluid (FF) were obtained before and after recombinant human chorionic gonadotrophin (rhCG) administration. PARTICIPANTS/MATERIALS, SETTING, METHODS Nine paired (nine arrays before rhCG and nine arrays after rhCG) samples of GC mRNA were amplified and hybridized to Affymetrix Human Gene 1.0 ST GeneChip arrays, compared and bioinformatically analyzed. Eleven selected genes were validated by quantitative reverse transcriptase PCR. FF hormones were analyzed by enzyme-linked immunosorbent assay. MAIN RESULTS AND THE ROLE OF CHANCE Eleven hundred and eighty-six genes were differentially expressed (>2-fold, P<0.0001, false discovery rate <0.0012) when comparing GC isolated before and 36 h after hCG, among those were genes known to be expressed at ovulation, i.e. ADAMTS1 and HAS2. Many new ovulation-related genes were revealed, such as CD24, ANKRD22, CLDN11 and FBXO32. FF estrogen, androstenedione and anti-Müllerian hormone decreased significantly while progesterone increased, accompanied by radical changes in the expression of steroidogenic genes (CYP17A, CYP19A, HSD11B1 and HSD11B2, StAR). Genes related to inflammation, angiogenesis, extracellular matrix formation, growth factors and cancer were up-regulated while cell cycle genes were massively down-regulated. Seventy-two genes previously described in connection with ovarian cancer were among the highly regulated genes. In silico analysis for top upstream regulators of the ovulatory trigger suggested--besides LH--TNF, IGF1, PGR, AR, EGR1 (early growth response 1), ERK1/2 (extracellular signal regulated kinase 1/2) and CDKN1A (cyclin-dependent kinase inhibitor 1A) as potential mediators of the LH/hCG response. LIMITATIONS, REASONS FOR CAUTION The present dataset was generated from women under hormonal stimulation. However, comparison with a macaque natural cycle whole follicle ovulation dataset revealed major overlap, supporting the idea that the ovulation-related genes found in this study are relevant in the human natural cycle. WIDER IMPLICATIONS OF THE FINDINGS These data will serve as a research resource for genes involved in human ovulation and final oocyte maturation. Ovulation-related genes might be good candidate biomarkers of follicle and oocyte health. Further, some of the ovulation-related genes may serve as future ovarian cancer biomarkers. STUDY FUNDING/COMPETING INTEREST(S) Grants from the Research Fund of Region Sjælland are gratefully acknowledged. None of the authors declared any conflict of interest. TRIAL REGISTRATION NUMBER Not applicable.
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Affiliation(s)
- M L Wissing
- The Fertility Clinic, Holbæk Sygehus, Holbæk, Denmark
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Bonnet A, Cabau C, Bouchez O, Sarry J, Marsaud N, Foissac S, Woloszyn F, Mulsant P, Mandon-Pepin B. An overview of gene expression dynamics during early ovarian folliculogenesis: specificity of follicular compartments and bi-directional dialog. BMC Genomics 2013; 14:904. [PMID: 24350644 PMCID: PMC3890531 DOI: 10.1186/1471-2164-14-904] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2013] [Accepted: 12/10/2013] [Indexed: 12/03/2022] Open
Abstract
Background Successful early folliculogenesis is crucial for female reproductive function. It requires appropriate gene specific expression of the different types of ovarian cells at different developmental stages. To date, most gene expression studies on the ovary were conducted in rodents and did not distinguish the type of cell. In mono-ovulating species, few studies have addressed gene expression profiles and mainly concerned human oocytes. Results We used a laser capture microdissection method combined with RNA-seq technology to explore the transcriptome in oocytes and granulosa cells (GCs) during development of the sheep ovarian follicle. We first documented the expression profile of 15 349 genes, then focused on the 5 129 genes showing differential expression between oocytes and GCs. Enriched functional categories such as oocyte meiotic arrest and GC steroid synthesis reflect two distinct cell fates. We identified the implication of GC signal transduction pathways such as SHH, WNT and RHO GTPase. In addition, signaling pathways (VEGF, NOTCH, IGF1, etc.) and GC transzonal projections suggest the existence of complex cell-cell interactions. Finally, we highlighted several transcription regulators and specifically expressed genes that likely play an important role in early folliculogenesis. Conclusions To our knowledge, this is the first comprehensive exploration of transcriptomes derived from in vivo oocytes and GCs at key stages in early follicular development in sheep. Collectively, our data advance our understanding of early folliculogenesis in mono-ovulating species and will be a valuable resource for unraveling human ovarian dysfunction such as premature ovarian failure (POF).
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Affiliation(s)
- Agnes Bonnet
- INRA, UMR444 Génétique Cellulaire, Auzeville, BP52627, F-31326, Castanet-Tolosan, France.
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