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Tetkova A, Susor A, Kubelka M, Nemcova L, Jansova D, Dvoran M, Del Llano E, Holubcova Z, Kalous J. Follicle-stimulating hormone administration affects amino acid metabolism in mammalian oocytes†. Biol Reprod 2020; 101:719-732. [PMID: 31290535 DOI: 10.1093/biolre/ioz117] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Revised: 06/18/2019] [Accepted: 07/04/2019] [Indexed: 12/27/2022] Open
Abstract
Culture media used in assisted reproduction are commonly supplemented with gonadotropin hormones to support the nuclear and cytoplasmic maturation of in vitro matured oocytes. However, the effect of gonadotropins on protein synthesis in oocytes is yet to be fully understood. As published data have previously documented a positive in vitro effect of follicle-stimulating hormone (FSH) on cytoplasmic maturation, we exposed mouse denuded oocytes to FSH in order to evaluate the changes in global protein synthesis. We found that dose-dependent administration of FSH resulted in a decrease of methionine incorporation into de novo synthesized proteins in denuded mouse oocytes and oocytes cultured in cumulus-oocyte complexes. Similarly, FSH influenced methionine incorporation in additional mammalian species including human. Furthermore, we showed the expression of FSH-receptor protein in oocytes. We found that major translational regulators were not affected by FSH treatment; however, the amino acid uptake became impaired. We propose that the effect of FSH treatment on amino acid uptake is influenced by FSH receptor with the effect on oocyte metabolism and physiology.
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Affiliation(s)
- Anna Tetkova
- Institute of Animal Physiology and Genetics, Czech Academy of Science, Libechov, Czech Republic.,Department of Cell Biology, Faculty of Science, Charles University in Prague, Prague 2, Czech Republic
| | - Andrej Susor
- Institute of Animal Physiology and Genetics, Czech Academy of Science, Libechov, Czech Republic
| | - Michal Kubelka
- Institute of Animal Physiology and Genetics, Czech Academy of Science, Libechov, Czech Republic
| | - Lucie Nemcova
- Institute of Animal Physiology and Genetics, Czech Academy of Science, Libechov, Czech Republic
| | - Denisa Jansova
- Institute of Animal Physiology and Genetics, Czech Academy of Science, Libechov, Czech Republic
| | - Michal Dvoran
- Institute of Animal Physiology and Genetics, Czech Academy of Science, Libechov, Czech Republic.,Department of Cell Biology, Faculty of Science, Charles University in Prague, Prague 2, Czech Republic
| | - Edgar Del Llano
- Institute of Animal Physiology and Genetics, Czech Academy of Science, Libechov, Czech Republic.,Department of Cell Biology, Faculty of Science, Charles University in Prague, Prague 2, Czech Republic
| | - Zuzana Holubcova
- Department of Histology and Embryology, Faculty of Medicine, Masaryk University, Brno, Czech Republic.,Reprofit International, Clinic of Reproductive Medicine, Brno, Czech Republic
| | - Jaroslav Kalous
- Institute of Animal Physiology and Genetics, Czech Academy of Science, Libechov, Czech Republic
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2
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Investigating the role of BCAR4 in ovarian physiology and female fertility by genome editing in rabbit. Sci Rep 2020; 10:4992. [PMID: 32193429 PMCID: PMC7081282 DOI: 10.1038/s41598-020-61689-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Accepted: 02/26/2020] [Indexed: 12/02/2022] Open
Abstract
Breast Cancer Anti-estrogen Resistance 4 (BCAR4) was previously characterised in bovine species as a gene preferentially expressed in oocytes, whose inhibition is detrimental to in vitro embryo development. But its role in oogenesis, folliculogenesis and globally fertility in vivo remains unknown. Because the gene is not conserved in mice, rabbits were chosen for investigation of BCAR4 expression and function in vivo. BCAR4 displayed preferential expression in the ovary compared to somatic organs, and within the ovarian follicle in the oocyte compared to somatic cells. The transcript was detected in follicles as early as the preantral stage. Abundance decreased throughout embryo development until the blastocyst stage. A lineage of genome-edited rabbits was produced; BCAR4 expression was abolished in follicles from homozygous animals. Females of wild-type, heterozygous and homozygous genotypes were examined for ovarian physiology and reproductive parameters. Follicle growth and the number of ovulations in response to hormonal stimulation were not significantly different between genotypes. Following insemination, homozygous females displayed a significantly lower delivery rate than their heterozygous counterparts (22 ± 7% vs 71 ± 11% (mean ± SEM)), while prolificacy was 1.8 ± 0.7 vs 6.0 ± 1.4 kittens per insemination. In conclusion, BCAR4 is not essential for follicular growth and ovulation but it contributes to optimal fertility in rabbits.
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3
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Spatio-temporal expression of ANK2 promotes cytokinesis in oocytes. Sci Rep 2019; 9:13121. [PMID: 31511568 PMCID: PMC6739377 DOI: 10.1038/s41598-019-49483-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Accepted: 08/21/2019] [Indexed: 01/01/2023] Open
Abstract
In the absence of transcription, the regulation of gene expression in oocytes is controlled almost exclusively at the level of transcriptome and proteome stabilization, and translation. A subset of maternal transcripts is stored in a translationally dormant state in the oocyte, and temporally driven translation of specific mRNAs propel meiotic progression, oocyte-to-embryo transition and early embryo development. We identified Ank2.3 as the only transcript variant present in the mouse oocyte and discovered that it is translated after nuclear envelope breakdown. Here we show that Ank2.3 mRNA is localized in higher concentration in the oocyte nucleoplasm and, after nuclear envelope breakdown, in the newly forming spindle where its translation occurs. Furthermore, we reveal that Ank2.3 mRNA contains an oligo-pyrimidine motif at 5'UTR that predetermines its translation through a cap-dependent pathway. Lastly, we show that prevention of ANK2 translation leads to abnormalities in oocyte cytokinesis.
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4
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Christou-Kent M, Kherraf ZE, Amiri-Yekta A, Le Blévec E, Karaouzène T, Conne B, Escoffier J, Assou S, Guttin A, Lambert E, Martinez G, Boguenet M, Fourati Ben Mustapha S, Cedrin Durnerin I, Halouani L, Marrakchi O, Makni M, Latrous H, Kharouf M, Coutton C, Thierry-Mieg N, Nef S, Bottari SP, Zouari R, Issartel JP, Ray PF, Arnoult C. PATL2 is a key actor of oocyte maturation whose invalidation causes infertility in women and mice. EMBO Mol Med 2019; 10:emmm.201708515. [PMID: 29661911 PMCID: PMC5938616 DOI: 10.15252/emmm.201708515] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
The genetic causes of oocyte meiotic deficiency (OMD), a form of primary infertility characterised by the production of immature oocytes, remain largely unexplored. Using whole exome sequencing, we found that 26% of a cohort of 23 subjects with OMD harboured the same homozygous nonsense pathogenic mutation in PATL2, a gene encoding a putative RNA‐binding protein. Using Patl2 knockout mice, we confirmed that PATL2 deficiency disturbs oocyte maturation, since oocytes and zygotes exhibit morphological and developmental defects, respectively. PATL2's amphibian orthologue is involved in the regulation of oocyte mRNA as a partner of CPEB. However, Patl2's expression profile throughout oocyte development in mice, alongside colocalisation experiments with Cpeb1, Msy2 and Ddx6 (three oocyte RNA regulators) suggest an original role for Patl2 in mammals. Accordingly, transcriptomic analysis of oocytes from WT and Patl2−/− animals demonstrated that in the absence of Patl2, expression levels of a select number of highly relevant genes involved in oocyte maturation and early embryonic development are deregulated. In conclusion, PATL2 is a novel actor of mammalian oocyte maturation whose invalidation causes OMD in humans.
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Affiliation(s)
- Marie Christou-Kent
- Genetics, Epigenetics and Therapies of Infertility, Institute for Advanced Biosciences, Inserm U1209, CNRS UMR 5309, Université Grenoble Alpes, Grenoble, France
| | - Zine-Eddine Kherraf
- Genetics, Epigenetics and Therapies of Infertility, Institute for Advanced Biosciences, Inserm U1209, CNRS UMR 5309, Université Grenoble Alpes, Grenoble, France
| | - Amir Amiri-Yekta
- Genetics, Epigenetics and Therapies of Infertility, Institute for Advanced Biosciences, Inserm U1209, CNRS UMR 5309, Université Grenoble Alpes, Grenoble, France.,UM GI-DPI, CHU de Grenoble, Grenoble, France.,Department of Genetics, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
| | - Emilie Le Blévec
- Genetics, Epigenetics and Therapies of Infertility, Institute for Advanced Biosciences, Inserm U1209, CNRS UMR 5309, Université Grenoble Alpes, Grenoble, France
| | - Thomas Karaouzène
- Genetics, Epigenetics and Therapies of Infertility, Institute for Advanced Biosciences, Inserm U1209, CNRS UMR 5309, Université Grenoble Alpes, Grenoble, France
| | - Béatrice Conne
- Department of Genetic Medicine and Development, University of Geneva Medical School, Geneva, Switzerland
| | - Jessica Escoffier
- Genetics, Epigenetics and Therapies of Infertility, Institute for Advanced Biosciences, Inserm U1209, CNRS UMR 5309, Université Grenoble Alpes, Grenoble, France
| | - Said Assou
- IRMB, INSERM U1183, CHRU Montpellier, Université Montpellier, Montpellier, France
| | - Audrey Guttin
- Grenoble Neuroscience Institute, INSERM 1216, Université Grenoble Alpes, Grenoble, France
| | - Emeline Lambert
- Genetics, Epigenetics and Therapies of Infertility, Institute for Advanced Biosciences, Inserm U1209, CNRS UMR 5309, Université Grenoble Alpes, Grenoble, France
| | - Guillaume Martinez
- Genetics, Epigenetics and Therapies of Infertility, Institute for Advanced Biosciences, Inserm U1209, CNRS UMR 5309, Université Grenoble Alpes, Grenoble, France.,UM GI-DPI, CHU de Grenoble, Grenoble, France.,UM de Génétique Chromosomique, CHU de Grenoble, Grenoble, France
| | - Magalie Boguenet
- Genetics, Epigenetics and Therapies of Infertility, Institute for Advanced Biosciences, Inserm U1209, CNRS UMR 5309, Université Grenoble Alpes, Grenoble, France
| | | | - Isabelle Cedrin Durnerin
- Service de Médecine de la Reproduction, Centre Hospitalier Universitaire Jean Verdier, Assistance Publique - Hôpitaux de Paris, Bondy, France
| | - Lazhar Halouani
- Polyclinique les Jasmins, Centre d'Aide Médicale à la Procréation, Centre Urbain Nord, Tunis, Tunisia
| | - Ouafi Marrakchi
- Polyclinique les Jasmins, Centre d'Aide Médicale à la Procréation, Centre Urbain Nord, Tunis, Tunisia
| | - Mounir Makni
- Polyclinique les Jasmins, Centre d'Aide Médicale à la Procréation, Centre Urbain Nord, Tunis, Tunisia
| | - Habib Latrous
- Polyclinique les Jasmins, Centre d'Aide Médicale à la Procréation, Centre Urbain Nord, Tunis, Tunisia
| | - Mahmoud Kharouf
- Polyclinique les Jasmins, Centre d'Aide Médicale à la Procréation, Centre Urbain Nord, Tunis, Tunisia
| | - Charles Coutton
- Genetics, Epigenetics and Therapies of Infertility, Institute for Advanced Biosciences, Inserm U1209, CNRS UMR 5309, Université Grenoble Alpes, Grenoble, France.,UM GI-DPI, CHU de Grenoble, Grenoble, France.,UM de Génétique Chromosomique, CHU de Grenoble, Grenoble, France
| | | | - Serge Nef
- Department of Genetic Medicine and Development, University of Geneva Medical School, Geneva, Switzerland
| | - Serge P Bottari
- Genetics, Epigenetics and Therapies of Infertility, Institute for Advanced Biosciences, Inserm U1209, CNRS UMR 5309, Université Grenoble Alpes, Grenoble, France
| | - Raoudha Zouari
- Polyclinique les Jasmins, Centre d'Aide Médicale à la Procréation, Centre Urbain Nord, Tunis, Tunisia
| | - Jean Paul Issartel
- Grenoble Neuroscience Institute, INSERM 1216, Université Grenoble Alpes, Grenoble, France
| | - Pierre F Ray
- Genetics, Epigenetics and Therapies of Infertility, Institute for Advanced Biosciences, Inserm U1209, CNRS UMR 5309, Université Grenoble Alpes, Grenoble, France.,UM GI-DPI, CHU de Grenoble, Grenoble, France
| | - Christophe Arnoult
- Genetics, Epigenetics and Therapies of Infertility, Institute for Advanced Biosciences, Inserm U1209, CNRS UMR 5309, Université Grenoble Alpes, Grenoble, France
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Kalous J, Tetkova A, Kubelka M, Susor A. Importance of ERK1/2 in Regulation of Protein Translation during Oocyte Meiosis. Int J Mol Sci 2018; 19:ijms19030698. [PMID: 29494492 PMCID: PMC5877559 DOI: 10.3390/ijms19030698] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Revised: 02/23/2018] [Accepted: 02/26/2018] [Indexed: 02/07/2023] Open
Abstract
Although the involvement of the extracellular signal-regulated kinases 1 and 2 (ERK1/2) pathway in the regulation of cytostatic factor (CSF) activity; as well as in microtubules organization during meiotic maturation of oocytes; has already been described in detail; rather less attention has been paid to the role of ERK1/2 in the regulation of mRNA translation. However; important data on the role of ERK1/2 in translation during oocyte meiosis have been documented. This review focuses on recent findings regarding the regulation of translation and the role of ERK1/2 in this process in the meiotic cycle of mammalian oocytes. The specific role of ERK1/2 in the regulation of mammalian target of rapamycin (mTOR); eukaryotic translation initiation factor 4E (eIF4E) and cytoplasmic polyadenylation element binding protein 1 (CPEB1) activity is addressed along with additional focus on the other key players involved in protein translation.
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Affiliation(s)
- Jaroslav Kalous
- Institute of Animal Physiology and Genetics, Academy of Sciences of the Czech Republic, Rumburska 89, 27721 Libechov, Czech Republic.
| | - Anna Tetkova
- Institute of Animal Physiology and Genetics, Academy of Sciences of the Czech Republic, Rumburska 89, 27721 Libechov, Czech Republic.
- Department of Cell Biology, Faculty of Science, Charles University in Prague, Albertov 6, 12843 Prague 2, Czech Republic.
| | - Michal Kubelka
- Institute of Animal Physiology and Genetics, Academy of Sciences of the Czech Republic, Rumburska 89, 27721 Libechov, Czech Republic.
| | - Andrej Susor
- Institute of Animal Physiology and Genetics, Academy of Sciences of the Czech Republic, Rumburska 89, 27721 Libechov, Czech Republic.
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Ernst EH, Grøndahl ML, Grund S, Hardy K, Heuck A, Sunde L, Franks S, Andersen CY, Villesen P, Lykke-Hartmann K. Dormancy and activation of human oocytes from primordial and primary follicles: molecular clues to oocyte regulation. Hum Reprod 2017; 32:1684-1700. [PMID: 28854595 DOI: 10.1093/humrep/dex238] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Accepted: 06/14/2017] [Indexed: 01/07/2023] Open
Abstract
STUDY QUESTION Do specific transcriptome dynamics in human oocytes from primordial and primary follicles identify novel pathways in oocyte activation? SUMMARY ANSWER The transcriptomic profiles in oocytes from primordial and primary follicles, respectively, revealed several new canonical pathways as putative mediators of oocyte dormancy and activation. WHAT IS KNOWN ALREADY Cellular signaling pathways including PI3K/AKT and AKT/mTOR as well as TGF-β and IGF signaling are known to regulate the primordial-to-primary transition in mammalian follicle development. STUDY DESIGN, SIZE, DURATION We performed a class comparison study on human oocytes from primordial (n = 436) and primary (n = 182) follicles donated by three women having ovarian tissue cryopreserved before chemotherapy. PARTICIPANTS/MATERIALS, SETTING, METHODS RNA was extracted from oocytes from primordial and primary follicles isolated by Laser Capture Microdissection, and submitted to the HiSeq Illumina platform. Data mapping, quality control, filtering and expression analysis were performed using Tophat (2.0.4), Cufflinks (2.0.2), BWA (0.6.2) and software R. Modeling of complex biological systems was performed using the IPA® software. Finally, qPCR and immunohistochemistry were employed to explore expression and localization of selected genes and products in human ovarian tissue. MAIN RESULTS AND THE ROLE OF CHANCE We found 223 and 268 genes down-regulated and up-regulated, respectively, in the oocytes during the human primordial-to-primary follicle transition (P < 0.05 and/or FPKM fold-change >2). IPA® enrichment analysis revealed known pathways ('mTOR Signaling', 'PI3K/AKT Signaling' and 'PTEN Signaling') as well as enriched canonical pathways not previously associated with human ovarian follicle development such as 'ErB Signaling' and 'NGF Signaling' in the down-regulated category and 'Regulation of eIF4 and P70S6K Signaling' and 'HER-2 Signaling in Breast Cancer' in the up-regulated group. Additionally, immunohistochemistry on human ovarian tissue explored the intraovarian localization of VASA, FOXO1 and eIF4E. LARGE SCALE DATA http://users-birc.au.dk/biopv/published_data/ernst_2017/. LIMITATIONS, REASONS FOR CAUTION This is a descriptive analysis and no functional studies were performed. The study was based on a limited number of patients and the experimental design could not take into account the natural biological variance in human samples. Therefore, qPCR was used to confirm selected genes alongside immunohistochemical stainings. WIDER IMPLICATIONS OF THE FINDINGS This study shows, for the first time, a detailed molecular description of global gene transcription activities in oocytes from primordial and primary follicles, respectively. Knowing the global transcription profiles of human oocyte dormancy and activation are important in developing new clinical applications. STUDY FUNDING/COMPETING INTEREST(S) E.H.E. was supported by Health Faculty, Aarhus University and Kong Christian Den Tiendes Fond. K.H. and S.F. were supported by an MRC (UK) project grant MR/M012638/1. K.L.H. was supported by grants from Fonden til Lægevidenskabens Fremme, Kong Christian Den Tiendes Fond. K.L.H. and L.S. were supported by the IDEAS grant from Aarhus University Research Foundation (AUFF). There are no conflicts of interest.
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Affiliation(s)
- E H Ernst
- Department of Biomedicine, Aarhus University, Department of Biomedicine, Aarhus University, Wilhelm Meyers Allé 4, DK-8000 Aarhus C, Denmark
| | - M L Grøndahl
- Fertility Clinic, Herlev Hospital, Herlev Ringvej 75, DK-2730 Herlev, Denmark
| | - S Grund
- Bioinformatics Research Centre (BiRC), Aarhus University, C.F.Møllers Allé 8, DK-8000 Aarhus C, Denmark
| | - K Hardy
- Institute of Reproductive and Developmental Biology, Imperial College London, South Kensington Campus, London SW7 2AZ, UK
| | - A Heuck
- Department of Biomedicine, Aarhus University, Department of Biomedicine, Aarhus University, Wilhelm Meyers Allé 4, DK-8000 Aarhus C, Denmark
| | - L Sunde
- Department of Biomedicine, Aarhus University, Department of Biomedicine, Aarhus University, Wilhelm Meyers Allé 4, DK-8000 Aarhus C, Denmark
- Department of Clinical Genetics, Aarhus University Hospital, Brendstrupgårdsvej 21, DK-8200 Aarhus N, Denmark
| | - S Franks
- Institute of Reproductive and Developmental Biology, Imperial College London, South Kensington Campus, London SW7 2AZ, UK
| | - C Y Andersen
- Laboratory of Reproductive Biology, Copenhagen University Hospital, Rigshospitalet, Blegdamsvej 9, DK-2100 Copenhagen N, Denmark
| | - P Villesen
- Bioinformatics Research Centre (BiRC), Aarhus University, C.F.Møllers Allé 8, DK-8000 Aarhus C, Denmark
- Department of Clinical Medicine, Aarhus University, Wilhelm Meyers Allé 4, DK-8000 Aarhus C, Denmark
| | - K Lykke-Hartmann
- Department of Biomedicine, Aarhus University, Department of Biomedicine, Aarhus University, Wilhelm Meyers Allé 4, DK-8000 Aarhus C, Denmark
- Department of Clinical Genetics, Aarhus University Hospital, Brendstrupgårdsvej 21, DK-8200 Aarhus N, Denmark
- Department of Clinical Medicine, Aarhus University, Wilhelm Meyers Allé 4, DK-8000 Aarhus C, Denmark
- Aarhus Institute of Advanced Studies, Aarhus University, Høegh-Guldbergs Gade 6B, DK-8000 Aarhus C, Denmark
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7
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Jansova D, Koncicka M, Tetkova A, Cerna R, Malik R, del Llano E, Kubelka M, Susor A. Regulation of 4E-BP1 activity in the mammalian oocyte. Cell Cycle 2017; 16:927-939. [PMID: 28272965 PMCID: PMC5462087 DOI: 10.1080/15384101.2017.1295178] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Revised: 01/31/2017] [Accepted: 02/08/2017] [Indexed: 01/03/2023] Open
Abstract
Fully grown mammalian oocytes utilize transcripts synthetized and stored during earlier development. RNA localization followed by a local translation is a mechanism responsible for the regulation of spatial and temporal gene expression. Here we show that the mouse oocyte contains 3 forms of cap-dependent translational repressor expressed on the mRNA level: 4E-BP1, 4E-BP2 and 4E-BP3. However, only 4E-BP1 is present as a protein in oocytes, it becomes inactivated by phosphorylation after nuclear envelope breakdown and as such it promotes cap-dependent translation after NEBD. Phosphorylation of 4E-BP1 can be seen in the oocytes after resumption of meiosis but it is not detected in the surrounding cumulus cells, indicating that 4E-BP1 promotes translation at a specific cell cycle stage. Our immunofluorescence analyses of 4E-BP1 in oocytes during meiosis I showed an even localization of global 4E-BP1, as well as of its 4E-BP1 (Thr37/46) phosphorylated form. On the other hand, 4E-BP1 phosphorylated on Ser65 is localized at the spindle poles, and 4E-BP1 phosphorylated on Thr70 localizes on the spindle. We further show that the main positive regulators of 4E-BP1 phosphorylation after NEBD are mTOR and CDK1 kinases, but not PLK1 kinase. CDK1 exerts its activity toward 4E-BP1 phosphorylation via phosphorylation and activation of mTOR. Moreover, both CDK1 and phosphorylated mTOR co-localize with 4E-BP1 phosphorylated on Thr70 on the spindle at the onset of meiotic resumption. Expression of the dominant negative 4E-BP1 mutant adversely affects translation and results in spindle abnormality. Taken together, our results show that the phosphorylation of 4E-BP1 promotes translation at the onset of meiosis to support the spindle assembly and suggest an important role of CDK1 and mTOR kinases in this process. We also show that the mTOR regulatory pathway is present in human oocytes and is likely to function in a similar way as in mouse oocytes.
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Affiliation(s)
- Denisa Jansova
- Institute of Animal Physiology and Genetics, ASC, Libechov, Czech Republic
| | - Marketa Koncicka
- Institute of Animal Physiology and Genetics, ASC, Libechov, Czech Republic
| | - Anna Tetkova
- Institute of Animal Physiology and Genetics, ASC, Libechov, Czech Republic
| | - Renata Cerna
- Institute of Animal Physiology and Genetics, ASC, Libechov, Czech Republic
| | - Radek Malik
- Institute of Molecular Genetics, ASCR, Prague, Czech Republic
| | - Edgar del Llano
- Institute of Animal Physiology and Genetics, ASC, Libechov, Czech Republic
| | - Michal Kubelka
- Institute of Animal Physiology and Genetics, ASC, Libechov, Czech Republic
| | - Andrej Susor
- Institute of Animal Physiology and Genetics, ASC, Libechov, Czech Republic
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8
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Abstract
Fully grown oocytes arrest meiosis at prophase I and deposit maternal RNAs. A subset of maternal transcripts is stored in a dormant state in the oocyte, and the timely driven translation of specific mRNAs guides meiotic progression, the oocyte-embryo transition, and early embryo development. In the absence of transcription, the regulation of gene expression in oocytes is controlled almost exclusively at the level of transcriptome and proteome stabilization and at the level of protein synthesis.This chapter focuses on the recent findings on RNA distribution related to the temporal and spatial translational control of the meiotic cycle progression in mammalian oocytes. We discuss the most relevant mechanisms involved in the organization of the oocyte's maternal transcriptome storage and localization, and the regulation of translation, in correlation with the regulation of oocyte meiotic progression.
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9
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da Rosa PRA, Dau AMP, De Cesaro MP, dos Santos JT, Gasperin BG, Duggavathi R, Bordignon V, Gonçalves PBD. Mechanistic target of rapamycin is activated in bovine granulosa cells after LH surge but is not essential for ovulation. Reprod Domest Anim 2016; 51:766-73. [DOI: 10.1111/rda.12745] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Accepted: 07/01/2016] [Indexed: 12/15/2022]
Affiliation(s)
- PRA da Rosa
- Laboratory of Biotechnology and Animal Reproduction - BioRep; Federal University of Santa Maria; Santa Maria RS Brazil
| | - AMP Dau
- Laboratory of Biotechnology and Animal Reproduction - BioRep; Federal University of Santa Maria; Santa Maria RS Brazil
| | - MP De Cesaro
- Laboratory of Biotechnology and Animal Reproduction - BioRep; Federal University of Santa Maria; Santa Maria RS Brazil
| | - JT dos Santos
- Laboratory of Biotechnology and Animal Reproduction - BioRep; Federal University of Santa Maria; Santa Maria RS Brazil
| | - BG Gasperin
- Laboratory of Animal Reproduction - ReproPEL; Federal University of Pelotas; Pelotas RS Brazil
| | - R Duggavathi
- Department of Animal Science; McGill University; Sainte-Anne-de-Bellevue QC Canada
| | - V Bordignon
- Department of Animal Science; McGill University; Sainte-Anne-de-Bellevue QC Canada
| | - PBD Gonçalves
- Laboratory of Biotechnology and Animal Reproduction - BioRep; Federal University of Santa Maria; Santa Maria RS Brazil
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10
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Lee GK, Shin H, Lim HJ. Rapamycin Influences the Efficiency of In vitro Fertilization and Development in the Mouse: A Role for Autophagic Activation. ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES 2015; 29:1102-10. [PMID: 26954158 PMCID: PMC4932563 DOI: 10.5713/ajas.15.0762] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/11/2015] [Revised: 10/01/2015] [Accepted: 10/07/2015] [Indexed: 12/13/2022]
Abstract
The mammalian target of rapamycin (mTOR) regulates cellular processes such as cell growth, metabolism, transcription, translation, and autophagy. Rapamycin is a selective inhibitor of mTOR, and induces autophagy in various systems. Autophagy contributes to clearance and recycling of macromolecules and organelles in response to stress. We previously reported that vitrified-warmed mouse oocytes show acute increases in autophagy during warming, and suggested that it is a natural response to cold stress. In this follow-up study, we examined whether the modulation of autophagy influences survival, fertilization, and developmental rates of vitrified-warmed mouse oocytes. We used rapamycin to enhance autophagy in metaphase II (MII) oocytes before and after vitrification. The oocytes were then subjected to in vitro fertilization (IVF). The fertilization and developmental rates of vitrified-warmed oocytes after rapamycin treatment were significantly lower than those for control groups. Modulation of autophagy with rapamycin treatment shows that rapamycin-induced autophagy exerts a negative influence on fertilization and development of vitrified-warmed oocytes.
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Affiliation(s)
- Geun-Kyung Lee
- Department of Biomedical Science and Technology, Institute of Biomedical Science and Technology, Konkuk University, Seoul 143-701, Korea
| | - Hyejin Shin
- Department of Biomedical Science and Technology, Institute of Biomedical Science and Technology, Konkuk University, Seoul 143-701, Korea
| | - Hyunjung Jade Lim
- Department of Biomedical Science and Technology, Institute of Biomedical Science and Technology, Konkuk University, Seoul 143-701, Korea.,Department of Veterinary Medicine, Konkuk University, Seoul 143-701, Korea
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Makker A, Goel MM, Mahdi AA. PI3K/PTEN/Akt and TSC/mTOR signaling pathways, ovarian dysfunction, and infertility: an update. J Mol Endocrinol 2014; 53:R103-18. [PMID: 25312969 DOI: 10.1530/jme-14-0220] [Citation(s) in RCA: 149] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Abnormalities in ovarian function, including defective oogenesis and folliculogenesis, represent a key female reproductive deficiency. Accumulating evidence in the literature has shown that the PI3K/PTEN/Akt and TSC/mTOR signaling pathways are critical regulators of ovarian function including quiescence, activation, and survival of primordial follicles, granulosa cell proliferation and differentiation, and meiotic maturation of oocytes. Dysregulation of these signaling pathways may contribute to infertility caused by impaired follicular development, intrafollicular oocyte development, and ovulation. This article reviews the current state of knowledge of the functional role of the PI3K/PTEN/Akt and TSC/mTOR pathways during mammalian oogenesis and folliculogenesis and their association with female infertility.
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Affiliation(s)
- Annu Makker
- Post-Graduate Department of PathologyDepartment of BiochemistryKing George's Medical University, Lucknow 226003, Uttar Pradesh, India
| | - Madhu Mati Goel
- Post-Graduate Department of PathologyDepartment of BiochemistryKing George's Medical University, Lucknow 226003, Uttar Pradesh, India
| | - Abbas Ali Mahdi
- Post-Graduate Department of PathologyDepartment of BiochemistryKing George's Medical University, Lucknow 226003, Uttar Pradesh, India
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Liu X, Pan S, Li X, Sun Q, Yang X, Zhao R. Maternal low-protein diet affects myostatin signaling and protein synthesis in skeletal muscle of offspring piglets at weaning stage. Eur J Nutr 2014; 54:971-9. [PMID: 25266448 DOI: 10.1007/s00394-014-0773-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2014] [Accepted: 09/19/2014] [Indexed: 11/26/2022]
Abstract
PURPOSE We tested the hypothesis that maternal low-protein (LP) diet during gestation and lactation can program myostatin (MSTN) signaling and protein synthesis in skeletal muscle of offspring at weaning stage (35 days). METHODS Fourteen Meishan sows were fed either LP or standard-protein diets throughout gestation and lactation, male offspring piglets were killed at weaning stage and longissimus dorsi (LD) muscles were taken. The cross-sectional areas (CSA) of LD muscles were measured by hematoxylin and eosin staining. The levels of free amino acids in plasma were measured by amino acid auto-analyzer. Proteins and mRNA were determined by Western blot and RT-qPCR, respectively. RESULTS Body weight, LD muscle weight and the myofiber CSA were significantly decreased (P < 0.05) in LP piglets; meanwhile, the concentration of branched-chain amino acids was also significantly decreased (P < 0.001). MSTN protein content tended to be higher (P = 0.098) in LP piglets, while the expression of MSTN receptors, activin type II receptor-beta and transforming growth factor type-beta type I receptor kinase, was significantly up-regulated (P < 0.05). Furthermore, p38 mitogen-activated protein kinase, the downstream signaling factor of MSTN, was also enhanced significantly (P < 0.05). In addition, key factors of translation initiation, phosphorylated eukaryotic initiation factor 4E and the 70 kDa ribosomal protein S6 kinase, were significantly decreased (P < 0.05) in LP piglets. CONCLUSIONS Our results suggest that maternal LP diet during gestation and lactation affects MSTN signaling and protein synthesis in skeletal muscle of offspring at weaning stage.
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Affiliation(s)
- Xiujuan Liu
- Key Laboratory of Animal Physiology and Biochemistry, Ministry of Agriculture, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China
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