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Fan X, Wang J, Ma Y, Chai D, Han S, Xiao C, Huang Y, Wang X, Wang J, Wang S, Xiao L, Zhang C. Activation of P2X7 Receptor Mediates the Abnormal Ovulation Induced by Chronic Restraint Stress and Chronic Cold Stress. BIOLOGY 2024; 13:620. [PMID: 39194558 DOI: 10.3390/biology13080620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2024] [Revised: 08/06/2024] [Accepted: 08/12/2024] [Indexed: 08/29/2024]
Abstract
Chronic stress has become a major problem that endangers people's physical and mental health. Studies have shown that chronic stress impairs female reproduction. However, the related mechanism is not fully understood. P2X7 receptor (P2X7R) is involved in a variety of pathological changes induced by chronic stress. Whether P2X7R is involved in the effect of chronic stress on female reproduction has not been studied. In this study, we established a chronic restraint stress mouse model and chronic cold stress mouse model. We found that the number of corpora lutea was significantly reduced in the two chronic stress models. The number of corpora lutea indirectly reflects the ovulation, suggesting that chronic stress influences ovulation. P2X7R expression was significantly increased in ovaries of the two chronic stress models. A superovulation experiment showed that P2X7R inhibitor A-438079 HCL partially rescued the ovulation rate of the two chronic stress models. Further studies showed that activation of P2X7R signaling inhibited the cumulus expansion and promoted the expression of NPPC in granulosa cells, one key negative factor of cumulus expansion. Moreover, sirius red staining showed that the ovarian fibrosis was increased in the two chronic stress models. For the fibrosis-related factors, TGF-β1 was increased and MMP2 was decreased. In vitro studies also showed that activation of P2X7R signaling upregulated the expression of TGF-β1 and downregulated the expression of MMP2 in granulosa cells. In conclusion, P2X7R expression was increased in the ovaries of the chronic restraint-stress and chronic cold-stress mouse models. Activation of P2X7R signaling promoted NPPC expression and cumulus expansion disorder, which contributed to the abnormal ovulation of the chronic stress model. Activation of P2X7R signaling is also associated with the ovarian fibrosis changes in the chronic stress model.
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Affiliation(s)
- Xiang Fan
- Department of Cell Biology, School of Basic Medical Sciences, Jiangxi Medical College, Nanchang University, Nanchang 330031, China
- Institute of Rehabilitation Science, Shaanxi Provincial Rehabilitation Hospital, Xi'an 710065, China
| | - Jing Wang
- Department of Microbiology, School of Basic Medical Sciences, Jiangxi Medical College, Nanchang University, Nanchang 330031, China
| | - Yinyin Ma
- Department of Cell Biology, School of Basic Medical Sciences, Jiangxi Medical College, Nanchang University, Nanchang 330031, China
| | - Dandan Chai
- Shangrao People's Hospital, Shangrao 334000, China
| | - Suo Han
- Department of Cell Biology, School of Basic Medical Sciences, Jiangxi Medical College, Nanchang University, Nanchang 330031, China
| | - Chuyu Xiao
- Department of Cell Biology, School of Basic Medical Sciences, Jiangxi Medical College, Nanchang University, Nanchang 330031, China
| | - Yingtong Huang
- Department of Cell Biology, School of Basic Medical Sciences, Jiangxi Medical College, Nanchang University, Nanchang 330031, China
| | - Xiaojie Wang
- Department of Cell Biology, School of Basic Medical Sciences, Jiangxi Medical College, Nanchang University, Nanchang 330031, China
| | - Jianming Wang
- Department of Cell Biology, School of Basic Medical Sciences, Jiangxi Medical College, Nanchang University, Nanchang 330031, China
| | - Shimeng Wang
- Department of Cell Biology, School of Basic Medical Sciences, Jiangxi Medical College, Nanchang University, Nanchang 330031, China
| | - Li Xiao
- Department of Cell Biology, School of Basic Medical Sciences, Jiangxi Medical College, Nanchang University, Nanchang 330031, China
| | - Chunping Zhang
- Department of Cell Biology, School of Basic Medical Sciences, Jiangxi Medical College, Nanchang University, Nanchang 330031, China
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Tang Y, Cui J, Wang X, Yang Q, Yue Y, Gao C, Wang Y, Wang W, Zhang S, Tian J, Xi G, An L. "Meiosis arrester" C-natriuretic peptide directly stimulates oocyte mtDNA accumulation and is implicated in aging-associated oocyte mtDNA loss. FASEB J 2023; 37:e23295. [PMID: 37984844 DOI: 10.1096/fj.202300886r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 09/30/2023] [Accepted: 10/25/2023] [Indexed: 11/22/2023]
Abstract
C-natriuretic peptide (CNP) is the central regulator of oocyte meiosis progression, thus coordinating synchronization of oocyte nuclear-cytoplasmic maturation. However, whether CNP can independently regulate cytoplasmic maturation has been long overlooked. Mitochondrial DNA (mtDNA) accumulation is the hallmark event of cytoplasmic maturation, but the mechanism underlying oocyte mtDNA replication remains largely elusive. Herein, we report that CNP can directly stimulate oocyte mtDNA replication at GV stage, and deficiency of follicular CNP may contribute largely to lower mtDNA copy number in in vitro matured oocytes. The mechanistic study showed that cAMP-PKA-CREB1 signaling cascade underlies the regulatory role of CNP in stimulating mtDNA replication and upregulating related genes. Of interest, we also report that CNP-NPR2 signaling is inhibited in aging follicles, and this inhibition is implicated in lower mtDNA copy number in oocytes from aging females. Together, our study provides the first direct functional link between follicular CNP and oocyte mtDNA replication, and identifies its involvement in aging-associated mtDNA loss in oocytes. These findings, not only update the current knowledge of the functions of CNP in coordinating oocyte maturation but also present a promising strategy for improving in vitro fertilization outcomes of aging females.
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Affiliation(s)
- Yawen Tang
- Key Laboratory of Animal Genetics, Breeding and Reproduction of the Ministry of Agriculture and Rural Affairs, National Engineering Laboratory for Animal Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Jian Cui
- Key Laboratory of Animal Genetics, Breeding and Reproduction of the Ministry of Agriculture and Rural Affairs, National Engineering Laboratory for Animal Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Xiaodong Wang
- Key Laboratory of Animal Genetics, Breeding and Reproduction of the Ministry of Agriculture and Rural Affairs, National Engineering Laboratory for Animal Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Qianying Yang
- Key Laboratory of Animal Genetics, Breeding and Reproduction of the Ministry of Agriculture and Rural Affairs, National Engineering Laboratory for Animal Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Yuan Yue
- Key Laboratory of Animal Genetics, Breeding and Reproduction of the Ministry of Agriculture and Rural Affairs, National Engineering Laboratory for Animal Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Chunxiao Gao
- Key Laboratory of Animal Genetics, Breeding and Reproduction of the Ministry of Agriculture and Rural Affairs, National Engineering Laboratory for Animal Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Yue Wang
- Key Laboratory of Animal Genetics, Breeding and Reproduction of the Ministry of Agriculture and Rural Affairs, National Engineering Laboratory for Animal Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Wenjing Wang
- Key Laboratory of Animal Genetics, Breeding and Reproduction of the Ministry of Agriculture and Rural Affairs, National Engineering Laboratory for Animal Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Shuai Zhang
- Key Laboratory of Animal Genetics, Breeding and Reproduction of the Ministry of Agriculture and Rural Affairs, National Engineering Laboratory for Animal Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Jianhui Tian
- Key Laboratory of Animal Genetics, Breeding and Reproduction of the Ministry of Agriculture and Rural Affairs, National Engineering Laboratory for Animal Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Guangyin Xi
- Key Laboratory of Animal Genetics, Breeding and Reproduction of the Ministry of Agriculture and Rural Affairs, National Engineering Laboratory for Animal Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Lei An
- Key Laboratory of Animal Genetics, Breeding and Reproduction of the Ministry of Agriculture and Rural Affairs, National Engineering Laboratory for Animal Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
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3
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Pei Z, Deng K, Xu C, Zhang S. The molecular regulatory mechanisms of meiotic arrest and resumption in Oocyte development and maturation. Reprod Biol Endocrinol 2023; 21:90. [PMID: 37784186 PMCID: PMC10544615 DOI: 10.1186/s12958-023-01143-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Accepted: 09/20/2023] [Indexed: 10/04/2023] Open
Abstract
In human female primordial germ cells, the transition from mitosis to meiosis begins from the fetal stage. In germ cells, meiosis is arrested at the diplotene stage of prophase in meiosis I (MI) after synapsis and recombination of homologous chromosomes, which cannot be segregated. Within the follicle, the maintenance of oocyte meiotic arrest is primarily attributed to high cytoplasmic concentrations of cyclic adenosine monophosphate (cAMP). Depending on the specific species, oocytes can remain arrested for extended periods of time, ranging from months to even years. During estrus phase in animals or the menstrual cycle in humans, the resumption of meiosis occurs in certain oocytes due to a surge of luteinizing hormone (LH) levels. Any factor interfering with this process may lead to impaired oocyte maturation, which in turn affects female reproductive function. Nevertheless, the precise molecular mechanisms underlying this phenomenon has not been systematically summarized yet. To provide a comprehensive understanding of the recently uncovered regulatory network involved in oocyte development and maturation, the progress of the cellular and molecular mechanisms of oocyte nuclear maturation including meiosis arrest and meiosis resumption is summarized. Additionally, the advancements in understanding the molecular cytoplasmic events occurring in oocytes, such as maternal mRNA degradation, posttranslational regulation, and organelle distribution associated with the quality of oocyte maturation, are reviewed. Therefore, understanding the pathways regulating oocyte meiotic arrest and resumption will provide detailed insight into female reproductive system and provide a theoretical basis for further research and potential approaches for novel disease treatments.
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Affiliation(s)
- Zhenle Pei
- Shanghai Ji Ai Genetics & IVF Institute, Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Obstetrics and Gynecology Hospital of Fudan University, Shanghai, 200011, China
| | - Ke Deng
- Shanghai Ji Ai Genetics & IVF Institute, Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Obstetrics and Gynecology Hospital of Fudan University, Shanghai, 200011, China
| | - Congjian Xu
- Shanghai Ji Ai Genetics & IVF Institute, Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Obstetrics and Gynecology Hospital of Fudan University, Shanghai, 200011, China.
- Department of Obstetrics and Gynecology of Shanghai Medical School, Fudan University, Shanghai, 200032, China.
| | - Shuo Zhang
- Shanghai Ji Ai Genetics & IVF Institute, Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Obstetrics and Gynecology Hospital of Fudan University, Shanghai, 200011, China.
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Fan W, Yuan Z, Li M, Zhang Y, Nan F. Decreased oocyte quality in patients with endometriosis is closely related to abnormal granulosa cells. Front Endocrinol (Lausanne) 2023; 14:1226687. [PMID: 37664845 PMCID: PMC10469306 DOI: 10.3389/fendo.2023.1226687] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Accepted: 08/01/2023] [Indexed: 09/05/2023] Open
Abstract
Infertility and menstrual abnormalities in endometriosis patients are frequently caused by aberrant follicular growth or a reduced ovarian reserve. Endometriosis typically does not directly harm the oocyte, but rather inhibits the function of granulosa cells, resulting in a decrease in oocyte quality. Granulosa cells, as oocyte nanny cells, can regulate meiosis, provide the most basic resources required for oocyte development, and influence ovulation. Endometriosis affects oocyte development and quality by causing granulosa cells apoptosis, inflammation, oxidative stress, steroid synthesis obstacle, and aberrant mitochondrial energy metabolism. These aberrant states frequently interact with one another, however there is currently relatively little research in this field to understand the mechanism of linkage between abnormal states.
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Affiliation(s)
- Weisen Fan
- The First Clinical Medical College, Shandong University of Traditional Chinese Medicine, Jinan, Shandong, China
| | - Zheng Yuan
- Department of Gynecology, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, Shandong, China
| | - Muzhen Li
- College of Acupuncture and Tuina, Shandong University of Traditional Chinese Medicine, Jinan, Shandong, China
| | - Yingjie Zhang
- The First Clinical Medical College, Shandong University of Traditional Chinese Medicine, Jinan, Shandong, China
| | - Fengjuan Nan
- Department of Gynecology, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, Shandong, China
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Liu Y, Zhong Y, Shen X, Guo X, Wu R, Yang T, Chen M. Luteinizing hormone stimulates the expression of amphiregulin in human theca cells. J Ovarian Res 2022; 15:129. [PMID: 36476625 PMCID: PMC9730684 DOI: 10.1186/s13048-022-01062-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Accepted: 11/20/2022] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Luteinizing hormone (LH) can stimulate mural granulosa cells to produce Amphiregulin (AREG), which can induce the resumption of meiosis in oocytes. Theca cells are present in the outer layer of follicles, providing communication with the pituitary axis through the established vascular system around the follicle. As LH target cells, it is unknown whether theca cells can produce AREG after LH stimulation. METHODS Primary cultured human theca cells were treated with LH (with or without the inhibitor of PKA, H89), or agonists of adenylate cyclase (forskolin or db-cAMP). The mRNA and protein levels of AREG were evaluated by RT-qPCR, immunochemistry, immunofluorescence, western blotting, and ELISA. RESULTS Immunohistochemistry of normal ovarian tissue obtained in the early-mid follicle phase showed that AREG expression was absent in both the theca layer and the granulosa cell layer of antral follicles. Double immunofluorescent staining revealed colocalization of AREG and CYP17A1 in human theca cells and colocalization of FSHR and AREG in human granulosa cells isolated from follicular fluid collected during IVF/ICSI after hCG trigger. LH significantly increased the mRNA and protein levels of AREG in human theca cells and the concentration of AREG in the culture medium. Forskolin and db-cAMP, activators of the cAMP/PKA signalling pathway, also significantly increased the mRNA and protein levels of AREG in human theca cells and the concentration of AREG in the culture medium. H89 antagonized the stimulating effect of LH on AREG expression in human theca cells. In addition, the concentration of AREG was lower in polycystic ovarian syndrome (PCOS) follicular fluid than in normal follicular fluid. The mRNA levels of AREG were significantly lower in PCOS granulosa cells and theca cells than in normal granulosa cells and theca cells. CONCLUSION LH can stimulate the expression of AREG in human theca cells, and the adenylate cyclase/cAMP/PKA cascade may mediate this process. Expression of AREG is decreased in PCOS theca cells compared to normal theca cells, with or without LH stimulation.
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Affiliation(s)
- Yang Liu
- grid.412615.50000 0004 1803 6239Reproductive Medicine Center, The First Affiliated Hospital of Sun Yat-sen University, Zhoushan 2 Road, Guangzhou, Guangdong People’s Republic of China ,grid.412615.50000 0004 1803 6239Guangdong Provincial Key Laboratory of Reproductive Medicine, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China ,grid.8547.e0000 0001 0125 2443Obstetrics and Gynaecology Hospital of Fudan University, Shanghai, China
| | - Yiping Zhong
- grid.412615.50000 0004 1803 6239Reproductive Medicine Center, The First Affiliated Hospital of Sun Yat-sen University, Zhoushan 2 Road, Guangzhou, Guangdong People’s Republic of China ,grid.412615.50000 0004 1803 6239Guangdong Provincial Key Laboratory of Reproductive Medicine, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Xiaoting Shen
- grid.412615.50000 0004 1803 6239Reproductive Medicine Center, The First Affiliated Hospital of Sun Yat-sen University, Zhoushan 2 Road, Guangzhou, Guangdong People’s Republic of China ,grid.412615.50000 0004 1803 6239Guangdong Provincial Key Laboratory of Reproductive Medicine, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Xi Guo
- grid.412615.50000 0004 1803 6239Reproductive Medicine Center, The First Affiliated Hospital of Sun Yat-sen University, Zhoushan 2 Road, Guangzhou, Guangdong People’s Republic of China ,grid.412615.50000 0004 1803 6239Guangdong Provincial Key Laboratory of Reproductive Medicine, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Rihan Wu
- grid.412615.50000 0004 1803 6239Reproductive Medicine Center, The First Affiliated Hospital of Sun Yat-sen University, Zhoushan 2 Road, Guangzhou, Guangdong People’s Republic of China ,grid.412615.50000 0004 1803 6239Guangdong Provincial Key Laboratory of Reproductive Medicine, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Turui Yang
- grid.412615.50000 0004 1803 6239Reproductive Medicine Center, The First Affiliated Hospital of Sun Yat-sen University, Zhoushan 2 Road, Guangzhou, Guangdong People’s Republic of China ,grid.412615.50000 0004 1803 6239Guangdong Provincial Key Laboratory of Reproductive Medicine, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Minghui Chen
- grid.412615.50000 0004 1803 6239Reproductive Medicine Center, The First Affiliated Hospital of Sun Yat-sen University, Zhoushan 2 Road, Guangzhou, Guangdong People’s Republic of China ,grid.412615.50000 0004 1803 6239Guangdong Provincial Key Laboratory of Reproductive Medicine, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
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SphK-produced S1P in somatic cells is indispensable for LH-EGFR signaling-induced mouse oocyte maturation. Cell Death Dis 2022; 13:963. [PMID: 36396932 PMCID: PMC9671891 DOI: 10.1038/s41419-022-05415-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2022] [Revised: 11/06/2022] [Accepted: 11/07/2022] [Indexed: 11/19/2022]
Abstract
Germ cell division and differentiation require intimate contact and interaction with the surrounding somatic cells. Luteinizing hormone (LH) triggers epidermal growth factor (EGF)-like growth factors to promote oocyte maturation and developmental competence by activating EGF receptor (EGFR) in somatic cells. Here, we showed that LH-EGFR signaling-activated sphingosine kinases (SphK) in somatic cells. The activation of EGFR by EGF increased S1P and calcium levels in cumulus-oocyte complexes (COCs), and decreased the binding affinity of natriuretic peptide receptor 2 (NPR2) for natriuretic peptide type C (NPPC) to release the cGMP-mediated meiotic arrest. These functions of EGF were blocked by the SphK inhibitor SKI-II, which could be reversed by the addition of S1P. S1P also activated the Akt/mTOR cascade reaction in oocytes and promoted targeting protein for Xklp2 (TPX2) accumulation and oocyte developmental competence. Specifically depleting Sphk1/2 in somatic cells reduced S1P levels and impaired oocyte meiotic maturation and developmental competence, resulting in complete female infertility. Collectively, SphK-produced S1P in somatic cells serves as a functional transmitter of LH-EGFR signaling from somatic cells to oocytes: acting on somatic cells to induce oocyte meiotic maturation, and acting on oocytes to improve oocyte developmental competence.
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Das D, Arur S. Regulation of oocyte maturation: Role of conserved ERK signaling. Mol Reprod Dev 2022; 89:353-374. [PMID: 35908193 PMCID: PMC9492652 DOI: 10.1002/mrd.23637] [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: 03/25/2022] [Revised: 07/12/2022] [Accepted: 07/18/2022] [Indexed: 11/11/2022]
Abstract
During oogenesis, oocytes arrest at meiotic prophase I to acquire competencies for resuming meiosis, fertilization, and early embryonic development. Following this arrested period, oocytes resume meiosis in response to species-specific hormones, a process known as oocyte maturation, that precedes ovulation and fertilization. Involvement of endocrine and autocrine/paracrine factors and signaling events during maintenance of prophase I arrest, and resumption of meiosis is an area of active research. Studies in vertebrate and invertebrate model organisms have delineated the molecular determinants and signaling pathways that regulate oocyte maturation. Cell cycle regulators, such as cyclin-dependent kinase (CDK1), polo-like kinase (PLK1), Wee1/Myt1 kinase, and the phosphatase CDC25 play conserved roles during meiotic resumption. Extracellular signal-regulated kinase (ERK), on the other hand, while activated during oocyte maturation in all species, regulates both species-specific, as well as conserved events among different organisms. In this review, we synthesize the general signaling mechanisms and focus on conserved and distinct functions of ERK signaling pathway during oocyte maturation in mammals, non-mammalian vertebrates, and invertebrates such as Drosophila and Caenorhabditis elegans.
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Affiliation(s)
- Debabrata Das
- Department of Genetics, UT MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Swathi Arur
- Department of Genetics, UT MD Anderson Cancer Center, Houston, TX 77030, USA
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Hatırnaz Ş, Hatırnaz ES, Ellibeş Kaya A, Hatırnaz K, Soyer Çalışkan C, Sezer Ö, Dokuzeylül Güngor N, Demirel C, Baltacı V, Tan S, Dahan M. Oocyte maturation abnormalities - A systematic review of the evidence and mechanisms in a rare but difficult to manage fertility pheneomina. Turk J Obstet Gynecol 2022; 19:60-80. [PMID: 35343221 PMCID: PMC8966321 DOI: 10.4274/tjod.galenos.2022.76329] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
A small proportion of infertile women experience repeated oocyte maturation abnormalities (OMAS). OMAS include degenerated and dysmorphic oocytes, empty follicle syndrome, oocyte maturation arrest (OMA), resistant ovary syndrome and maturation defects due to primary ovarian insufficiency. Genetic factors play an important role in OMAS but still need specifications. This review documents the spectrum of OMAS and to evaluate the multiple subtypes classified as OMAS. In this review, readers will be able to understand the oocyte maturation mechanism, gene expression and their regulation that lead to different subtypes of OMAs, and it will discuss the animal and human studies related to OMAS and lastly the treatment options for OMAs. Literature searches using PubMed, MEDLINE, Embase, National Institute for Health and Care Excellence were performed to identify articles written in English focusing on Oocyte Maturation Abnormalities by looking for the following relevant keywords. A search was made with the specified keywords and included books and documents, clinical trials, animal studies, human studies, meta-analysis, randomized controlled trials, reviews, systematic reviews and options written in english. The search detected 3,953 sources published from 1961 to 2021. After title and abstract screening for study type, duplicates and relevancy, 2,914 studies were excluded. The remaining 1,039 records were assessed for eligibility by full-text reading and 886 records were then excluded. Two hundred and twenty seven full-text articles and 0 book chapters from the database were selected for inclusion. Overall, 227 articles, one unpublished and one abstract paper were included in this final review. In this review study, OMAS were classified and extensively evaluatedand possible treatment options under the light of current information, present literature and ongoing studies. Either genetic studies or in vitro maturation studies that will be handled in the future will lead more informations to be reached and may make it possible to obtain pregnancies.
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Affiliation(s)
- Şafak Hatırnaz
- Medicana Samsun International Hospital, In Vitro Fertilization-In Vitro Maturation Unit, Samsun, Turkey
| | - Ebru Saynur Hatırnaz
- Medicana Samsun International Hospital, In Vitro Fertilization-In Vitro Maturation Unit, Samsun, Turkey
| | - Aşkı Ellibeş Kaya
- Private Office, Clinic of Obstetrics and Gynecology Specialist, Samsun, Turkey
| | - Kaan Hatırnaz
- Ondokuz Mayıs University Faculty of Medicine, Department of Molecular Biology and Genetics, Samsun, Turkey
| | - Canan Soyer Çalışkan
- University of Health Sciences Turkey, Samsun Training and Research Hospital, Clinic of Obstetrics and Gynecology, Samsun, Turkey
| | - Özlem Sezer
- University of Health Sciences Turkey, Samsun Training and Research Hospital, Clinic of Genetics, Samsun, Turkey
| | | | - Cem Demirel
- Memorial Ataşehir Hospital, In Vitro Fertilization Unit, İstanbul, Turkey
| | | | - Seang Tan
- James Edmund Dodds Chair in ObGyn, Department of ObGyn, McGill University, OriginElle Fertility Clinic and Women, QC, Canada
| | - Michael Dahan
- McGill Reproductive Centre, Department of ObGyn, McGill University Montreal, Quebec, Canada
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Single-Cell Sequencing Reveals an Intrinsic Heterogeneity of the Preovulatory Follicular Microenvironment. Biomolecules 2022; 12:biom12020231. [PMID: 35204732 PMCID: PMC8961562 DOI: 10.3390/biom12020231] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 01/19/2022] [Accepted: 01/26/2022] [Indexed: 02/04/2023] Open
Abstract
The follicular microenvironment, including intra-follicular granulosa cells (GCs), is responsible for oocyte maturation and subsequent ovulation. However, the functions of GCs and cellular components of the follicular microenvironment in preovulatory follicles have not been extensively explored. Here, we surveyed the single-cell transcriptome of the follicular microenvironment around MII oocytes in six human preovulatory follicles in in vitro fertilization. There were six different cell types in the preovulatory follicles, including GCs and various immune cells. In GCs, we identified nine different functional clusters with different functional transcriptomic profiles, including specific clusters involved in inflammatory responses and adhesive function. Follicular macrophages are involved in immune responses, extracellular matrix remoulding and assist GCs in promoting the oocyte meiotic resumption. Interestingly, we observed that the specific terminal state subcluster of GCs with high levels of adhesive-related molecules should result in macrophage recruitment and residence, further contributing to an obvious heterogeneity of the immune cell proportion in preovulatory follicles from different patients. Our results provide a comprehensive understanding of the transcriptomic landscape of the preovulatory follicular microenvironment at the single-cell level. It provides valuable insights into understanding the regulation of the oocyte maturation and ovulation process, offering potential clues for the diagnosis and treatment of oocyte-maturation-related and ovulation-related diseases.
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10
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Lu S, Zhang H, Tang Y, Xu R, Liu J, Yao R, Wei J, Li C, Zhao X, Wei Q, Ma B. G protein-coupled estrogen receptor signaling dependent epidermal growth-like factor expression is required for NPR2 inhibition and meiotic resumption in goat oocytes. Theriogenology 2021; 176:35-42. [PMID: 34571396 DOI: 10.1016/j.theriogenology.2021.09.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 09/13/2021] [Accepted: 09/15/2021] [Indexed: 01/12/2023]
Abstract
G protein-coupled estrogen receptor (GPER), which is different from traditional estrogen nuclear receptors (ERs), mediates the rapid transduction of nongenomic signals in cells, and works by regulating transcription and intracellular second messengers. Studies have shown that GPER may regulate oocyte maturation, but the relevant mechanism is not entirely clear. Here, goat cumulus-oocyte complexes (COCs) were used as a model to explore the regulation and mechanism of GPER on oocyte maturation. Our study showed that 17β-estradiol (E2) significantly reduced cyclic guanosine monophosphate (cGMP) synthesis in COCs and accelerated the meiotic resumption of goat oocytes via GPER. Further investigation found that GPER mediated the downregulation of natriuretic peptide receptor 2 (NPR2) protein expression in goat cumulus cells by E2. In addition, we found that E2 significantly upregulated the mRNA levels of epidermal growth (EGF)-like factors in goat cumulus cells through GPER, and activated the downstream EGF receptor (EGFR) and extracellular signal-regulated kinase 1/2 (ERK1/2) signaling pathways. Both AG1478 (EGFR inhibitor) and U0126 (ERK1/2 inhibitor) abolished the inhibitory effect of E2 on the protein expression of NPR2. These results indicate that, through GPER, E2 upregulates the mRNA levels of EGF-like factors in goat cumulus cells and activates the downstream EGF signaling network to suppress the expression of NPR2 protein, which results in a decrease in cGMP synthesis and acceleration of meiotic resumption in goat oocytes.
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Affiliation(s)
- Sihai Lu
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, People's Republic of China; Key Laboratory of Animal Biotechnology, Ministry of Agriculture, Yangling, Shaanxi, People's Republic of China
| | - Hui Zhang
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, People's Republic of China; Key Laboratory of Animal Biotechnology, Ministry of Agriculture, Yangling, Shaanxi, People's Republic of China
| | - Yaju Tang
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, People's Republic of China; Key Laboratory of Animal Biotechnology, Ministry of Agriculture, Yangling, Shaanxi, People's Republic of China
| | - Rui Xu
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, People's Republic of China; Key Laboratory of Animal Biotechnology, Ministry of Agriculture, Yangling, Shaanxi, People's Republic of China
| | - Jie Liu
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, People's Republic of China; Key Laboratory of Animal Biotechnology, Ministry of Agriculture, Yangling, Shaanxi, People's Republic of China
| | - Ru Yao
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, People's Republic of China; Key Laboratory of Animal Biotechnology, Ministry of Agriculture, Yangling, Shaanxi, People's Republic of China
| | - Juncai Wei
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, People's Republic of China; Key Laboratory of Animal Biotechnology, Ministry of Agriculture, Yangling, Shaanxi, People's Republic of China
| | - Chan Li
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, People's Republic of China; Key Laboratory of Animal Biotechnology, Ministry of Agriculture, Yangling, Shaanxi, People's Republic of China
| | - Xiaoe Zhao
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, People's Republic of China; Key Laboratory of Animal Biotechnology, Ministry of Agriculture, Yangling, Shaanxi, People's Republic of China
| | - Qiang Wei
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, People's Republic of China; Key Laboratory of Animal Biotechnology, Ministry of Agriculture, Yangling, Shaanxi, People's Republic of China
| | - Baohua Ma
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, People's Republic of China; Key Laboratory of Animal Biotechnology, Ministry of Agriculture, Yangling, Shaanxi, People's Republic of China.
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11
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Sgpl1 deletion elevates S1P levels, contributing to NPR2 inactivity and p21 expression that block germ cell development. Cell Death Dis 2021; 12:574. [PMID: 34083520 PMCID: PMC8175456 DOI: 10.1038/s41419-021-03848-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 05/19/2021] [Accepted: 05/20/2021] [Indexed: 11/20/2022]
Abstract
Sphingosine phosphate lyase 1 (SGPL1) is a highly conserved enzyme that irreversibly degrades sphingosine-1-phosphate (S1P). Sgpl1-knockout mice fail to develop germ cells, resulting in infertility. However, the molecular mechanism remains unclear. The results of the present study showed that SGPL1 was expressed mainly in granulosa cells, Leydig cells, spermatocytes, and round spermatids. Sgpl1 deletion led to S1P accumulation in the gonads. In the ovary, S1P decreased natriuretic peptide receptor 2 (NPR2) activity in granulosa cells and inhibited early follicle growth. In the testis, S1P increased the levels of cyclin-dependent kinase inhibitor 1A (p21) and apoptosis in Leydig cells, thus resulting in spermatogenesis arrest. These results indicate that Sgpl1 deletion increases intracellular S1P levels, resulting in the arrest of female and male germ cell development via different signaling pathways.
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12
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He M, Zhang T, Yang Y, Wang C. Mechanisms of Oocyte Maturation and Related Epigenetic Regulation. Front Cell Dev Biol 2021; 9:654028. [PMID: 33842483 PMCID: PMC8025927 DOI: 10.3389/fcell.2021.654028] [Citation(s) in RCA: 52] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Accepted: 02/25/2021] [Indexed: 12/16/2022] Open
Abstract
Meiosis is the basis of sexual reproduction. In female mammals, meiosis of oocytes starts before birth and sustains at the dictyate stage of meiotic prophase I before gonadotropins-induced ovulation happens. Once meiosis gets started, the oocytes undergo the leptotene, zygotene, and pachytene stages, and then arrest at the dictyate stage. During each estrus cycle in mammals, or menstrual cycle in humans, a small portion of oocytes within preovulatory follicles may resume meiosis. It is crucial for females to supply high quality mature oocytes for sustaining fertility, which is generally achieved by fine-tuning oocyte meiotic arrest and resumption progression. Anything that disturbs the process may result in failure of oogenesis and seriously affect both the fertility and the health of females. Therefore, uncovering the regulatory network of oocyte meiosis progression illuminates not only how the foundations of mammalian reproduction are laid, but how mis-regulation of these steps result in infertility. In order to provide an overview of the recently uncovered cellular and molecular mechanism during oocyte maturation, especially epigenetic modification, the progress of the regulatory network of oocyte meiosis progression including meiosis arrest and meiosis resumption induced by gonadotropins is summarized. Then, advances in the epigenetic aspects, such as histone acetylation, phosphorylation, methylation, glycosylation, ubiquitination, and SUMOylation related to the quality of oocyte maturation are reviewed.
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Affiliation(s)
- Meina He
- Department of Biology, School of Basic Medical Science, Guizhou Medical University, Guiyang, China
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, China
- Key Laboratory of Ministry of Education for Conservation and Utilization of Special Biological Resources in the Western China, College of Life Science, Ningxia University, Yinchuan, China
| | - Tuo Zhang
- Department of Physiology, School of Basic Medical Sciences, Guizhou Medical University, Guiyang, China
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, China
- Key Laboratory of Ministry of Education for Conservation and Utilization of Special Biological Resources in the Western China, College of Life Science, Ningxia University, Yinchuan, China
| | - Yi Yang
- Key Laboratory of Ministry of Education for Conservation and Utilization of Special Biological Resources in the Western China, College of Life Science, Ningxia University, Yinchuan, China
| | - Chao Wang
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, China
- Key Laboratory of Ministry of Education for Conservation and Utilization of Special Biological Resources in the Western China, College of Life Science, Ningxia University, Yinchuan, China
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13
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Abbassi L, El-Hayek S, Carvalho KF, Wang W, Yang Q, Granados-Aparici S, Mondadori R, Bordignon V, Clarke HJ. Epidermal growth factor receptor signaling uncouples germ cells from the somatic follicular compartment at ovulation. Nat Commun 2021; 12:1438. [PMID: 33664246 PMCID: PMC7933413 DOI: 10.1038/s41467-021-21644-z] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Accepted: 02/07/2021] [Indexed: 01/31/2023] Open
Abstract
Germ cells are physically coupled to somatic support cells of the gonad during differentiation, but this coupling must be disrupted when they are mature, freeing them to participate in fertilization. In mammalian females, coupling occurs via specialized filopodia that project from the ovarian follicular granulosa cells to the oocyte. Here, we show that signaling through the epidermal growth factor receptor (EGFR) in the granulosa, which becomes activated at ovulation, uncouples the germ and somatic cells by triggering a massive and temporally synchronized retraction of the filopodia. Although EGFR signaling triggers meiotic maturation of the oocyte, filopodial retraction is independent of the germ cell state, being regulated solely within the somatic compartment, where it requires ERK-dependent calpain-mediated loss of filopodia-oocyte adhesion followed by Arp2/3-mediated filopodial shortening. By uncovering the mechanism regulating germ-soma uncoupling at ovulation, our results open a path to improving oocyte quality in human and animal reproduction.
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Affiliation(s)
- Laleh Abbassi
- Research Institute of the McGill University Health Centre, Montreal, Canada
- Division of Experimental Medicine, McGill University, Montreal, Canada
- Princess Margaret Cancer Centre, University Health Network, Toronto, Canada
| | - Stephany El-Hayek
- Research Institute of the McGill University Health Centre, Montreal, Canada
- Department of Biology, McGill University, Montreal, Canada
- Centre for Arab Genomic Studies, Dubai, United Arab Emirates
| | - Karen Freire Carvalho
- Research Institute of the McGill University Health Centre, Montreal, Canada
- Division of Experimental Medicine, McGill University, Montreal, Canada
| | - Wusu Wang
- Research Institute of the McGill University Health Centre, Montreal, Canada
- College of Animal Science and Technology, Northwest A&F University, Shaanxi, PR China
| | - Qin Yang
- Research Institute of the McGill University Health Centre, Montreal, Canada
| | | | - Rafael Mondadori
- Department of Animal Science, McGill University, Montreal, Canada
| | - Vilceu Bordignon
- Department of Animal Science, McGill University, Montreal, Canada
| | - Hugh J Clarke
- Research Institute of the McGill University Health Centre, Montreal, Canada.
- Division of Experimental Medicine, McGill University, Montreal, Canada.
- Department of Biology, McGill University, Montreal, Canada.
- Department of Obstetrics and Gynecology, McGill University, Montreal, Canada.
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14
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Idrees M, Kumar V, Joo MD, Ali N, Lee KW, Kong IK. SHP2 Nuclear/Cytoplasmic Trafficking in Granulosa Cells Is Essential for Oocyte Meiotic Resumption and Maturation. Front Cell Dev Biol 2021; 8:611503. [PMID: 33553147 PMCID: PMC7862566 DOI: 10.3389/fcell.2020.611503] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 11/30/2020] [Indexed: 12/21/2022] Open
Abstract
Src-homology-2-containing phosphotyrosine phosphatase (SHP2), a classic cytoplasmic protein and a major regulator of receptor tyrosine kinases and G protein-coupled receptors, plays a significant role in preimplantation embryo development. In this study, we deciphered the role of SHP2 in the somatic compartment of oocytes during meiotic maturation. SHP2 showed nuclear/cytoplasmic localization in bovine cumulus and human granulosa (COV434) cells. Follicle-stimulating hormone (FSH) treatment significantly enhanced cytoplasmic SHP2 localization, in contrast to the E2 treatment, which augmented nuclear localization. Enhanced cytoplasmic SHP2 was found to negatively regulate the expression of the ERα-transcribed NPPC and NPR2 mRNAs, which are vital for oocyte meiotic arrest. The co-immunoprecipitation results revealed the presence of the SHP2/ERα complex in the germinal vesicle-stage cumulus-oocyte complexes, and this complex significantly decreased with the progression of meiotic maturation. The complex formation between ERα and SHP2 was also confirmed by using a series of computational modeling methods. To verify the correlation between SHP2 and NPPC/NPR2, SHP2 was knocked down via RNA interference, and NPPC and NPR2 mRNAs were analyzed in the control, E2, and FSH-stimulated COV434 cells. Furthermore, phenyl hydrazonopyrazolone sulfonate 1, a site-directed inhibitor of active SHP2, showed no significant effect on the ERα-transcribed NPPC and NPR2 mRNAs. Taken together, these findings support a novel nuclear/cytoplasmic role of SHP2 in oocyte meiotic resumption and maturation.
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Affiliation(s)
- Muhammad Idrees
- Division of Applied Life Science (BK21 Four), Institute of Agriculture and Life Science (IALS), Gyeongsang National University, Jinju, South Korea
| | - Vikas Kumar
- Division of Applied Life Science, Department of Bio and Medical Big Data (BK21 Four), Research Institute of Natural Science (RINS), Gyeongsang National University (GNU), Jinju, South Korea
| | - Myeong-Don Joo
- Division of Applied Life Science (BK21 Four), Institute of Agriculture and Life Science (IALS), Gyeongsang National University, Jinju, South Korea
| | - Niaz Ali
- Institute of Basic Medical Sciences, Khybar Medical University, Peshawar, Pakistan
| | - Keun-Woo Lee
- Division of Applied Life Science, Department of Bio and Medical Big Data (BK21 Four), Research Institute of Natural Science (RINS), Gyeongsang National University (GNU), Jinju, South Korea
| | - Il-Keun Kong
- Division of Applied Life Science (BK21 Four), Institute of Agriculture and Life Science (IALS), Gyeongsang National University, Jinju, South Korea.,The King Kong Corp. Ltd., Gyeongsang National University, Jinju, South Korea
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15
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Wang H, Cai H, Wang X, Zhang M, Liu B, Chen Z, Yang T, Fang J, Zhang Y, Liu W, Han J, Guo Q, Zhang H, Wang H, Xia G, Wang C. HDAC3 maintains oocyte meiosis arrest by repressing amphiregulin expression before the LH surge. Nat Commun 2019; 10:5719. [PMID: 31844300 PMCID: PMC6915726 DOI: 10.1038/s41467-019-13671-8] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Accepted: 11/18/2019] [Indexed: 11/21/2022] Open
Abstract
It is known that granulosa cells (GCs) mediate gonadotropin-induced oocyte meiosis resumption by releasing EGF-like factors in mammals, however, the detailed molecular mechanisms remain unclear. Here, we demonstrate that luteinizing hormone (LH) surge-induced histone deacetylase 3 (HDAC3) downregulation in GCs is essential for oocyte maturation. Before the LH surge, HDAC3 is highly expressed in GCs. Transcription factors, such as FOXO1, mediate recruitment of HDAC3 to the amphiregulin (Areg) promoter, which suppresses AREG expression. With the LH surge, decreased HDAC3 in GCs enables histone H3K14 acetylation and binding of the SP1 transcription factor to the Areg promoter to initiate AREG transcription and oocyte maturation. Conditional knockout of Hdac3 in granulosa cells in vivo or inhibition of HDAC3 activity in vitro promotes the maturation of oocytes independent of LH. Taking together, HDAC3 in GCs within ovarian follicles acts as a negative regulator of EGF-like growth factor expression before the LH surge. Before ovulation, a surge of luteinizing hormone (LH) triggers the resumption of meiosis in oocytes, which is mediated by EGF-like growth factors. Here, the authors show that HDAC3 inhibits mouse oocyte maturation by negatively regulating the expression of EGF-like factor before the LH surge.
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Affiliation(s)
- Huarong Wang
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, 100193, Beijing, China.,Medical College of Xiamen University, 361005, Xiamen, China
| | - Han Cai
- Medical College of Xiamen University, 361005, Xiamen, China
| | - Xiao Wang
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, 100193, Beijing, China.,Beijing Advanced Innovation Center for Genomics, Biomedical Pioneering Innovation Center, College of Life Sciences, Peking University, 100871, Beijing, China
| | - Meiling Zhang
- Shanghai Key Laboratory for Assistant Reproduction and Reproductive Genetics, Center for Reproductive Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, 200127, Shanghai, China
| | - Bingying Liu
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, 100193, Beijing, China
| | - Ziqi Chen
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, 100193, Beijing, China
| | - Tingting Yang
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, 100193, Beijing, China
| | - Junshun Fang
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, 100193, Beijing, China.,Reproductive Medical Center, Drum Tower Hospital Affiliated to Nanjing University Medical College, Zhongshan Road 321, 210008, Nanjing, China
| | - Yanhao Zhang
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, 100193, Beijing, China
| | - Wei Liu
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, 100193, Beijing, China
| | - Jun Han
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, 100193, Beijing, China
| | - Qirui Guo
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, 100193, Beijing, China
| | - Hua Zhang
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, 100193, Beijing, China
| | - Haibin Wang
- Medical College of Xiamen University, 361005, Xiamen, China
| | - Guoliang Xia
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, 100193, Beijing, China.,Key Laboratory of Ministry of Education for Conservation and Utilization of Special Biological Resources in the Western China, College of Life Science, Ningxia University, 750021, Yinchuan, Ningxia, China
| | - Chao Wang
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, 100193, Beijing, China.
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16
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Zhang Y, Yang J, Yang J, Li J, Zhang M. CREB activity is required for epidermal growth factor‐induced mouse cumulus expansion. Mol Reprod Dev 2019; 86:1887-1900. [DOI: 10.1002/mrd.23285] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Accepted: 09/28/2019] [Indexed: 12/28/2022]
Affiliation(s)
- Yu Zhang
- State Key Laboratory for Agrobiotechnology, College of Biological SciencesChina Agricultural University Beijing China
| | - Jian Yang
- State Key Laboratory for Agrobiotechnology, College of Biological SciencesChina Agricultural University Beijing China
| | - Jing Yang
- State Key Laboratory for Agrobiotechnology, College of Biological SciencesChina Agricultural University Beijing China
| | - Jia Li
- State Key Laboratory for Agrobiotechnology, College of Biological SciencesChina Agricultural University Beijing China
| | - Meijia Zhang
- State Key Laboratory for Agrobiotechnology, College of Biological SciencesChina Agricultural University Beijing China
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17
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Clarke H. Control of Mammalian Oocyte Development by Interactions with the Maternal Follicular Environment. Results Probl Cell Differ 2019; 63:17-41. [PMID: 28779312 DOI: 10.1007/978-3-319-60855-6_2] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Development of animal germ cells depends critically on continuous contact and communication with the somatic compartment of the gonad. In females, each oocyte is enclosed within a follicle, whose somatic cells supply nutrients that sustain basal metabolic activity of the oocyte and send signals that regulate its differentiation. This maternal microenvironment thus plays an indispensable role in ensuring the production of fully differentiated oocytes that can give rise to healthy embryos. The granulosa cells send signals, likely membrane-associated Kit ligand, which trigger oocytes within resting-stage primordial follicles to initiate growth. During growth, the granulosa cells feed amino acids, nucleotides, and glycolytic substrates to the oocyte. These factors are necessary for the oocyte to complete its growth and are delivered via gap junctions that couple the granulosa cells to the oocyte. In a complementary manner, growing oocytes also release growth factors, notably growth-differentiation factor 9 and bone morphogenetic protein 15, which are necessary for proper differentiation of the granulosa cells and for these cells to support oocyte growth. During the late stages of oocyte growth, cyclic GMP that is synthesized by the granulosa cells and diffuses into the oocyte is required to prevent its precocious entry into meiotic maturation. Finally, at the early stages of maturation, granulosa cell signals promote the synthesis of a subset of proteins within the oocyte that enhance their ability to develop as embryos. Thus, the maternal legacy of the follicular microenvironment is witnessed by the fertilization of the ovulated oocyte and subsequent birth of healthy offspring.
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Affiliation(s)
- Hugh Clarke
- Department of Obstetrics and Gynecology, Research Institute of the McGill University Health Centre, McGill University, Room E.M0.2218, Glen Research Building, 100 Boul Decarie, Montreal, QC, Canada, H4A 3J1.
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18
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Abstract
A central dogma of mammalian reproductive biology is that the size of the primordial follicle pool represents reproductive capacity in females. The assembly of the primordial follicle starts after the primordial germ cells (PGCs)-derived oocyte releases from the synchronously dividing germline cysts. PGCs initiate meiosis during fetal development. However, after synapsis and recombination of homologous chromosomes, they arrest at the diplotene stage of the first meiotic prophase (MI). The diplotene-arrested oocyte, together with the surrounding of a single layer of flattened granulosa cells, forms a basic unit of the ovary, the primordial follicle. At the start of each estrous (animal) or menstrual cycle (human), in response to a surge of luteinizing hormone (LH) from the pituitary gland, a limited number of primordial follicles are triggered to develop into primary follicles, preantral follicles, antral follicles and reach to preovulatory follicle stage. During the transition from the preantral to antral stages, the enclosed oocyte gradually acquires the capacity to resume meiosis. Meiotic resumption from the prophase of MI is morphologically characterized by the dissolution of the oocyte nuclear envelope, which is generally termed the "germinal vesicle breakdown" (GVBD). Following GVBD and completion of MI, the oocyte enters meiosis II without an obvious S-phase and arrests at metaphase phase II (MII) until fertilization. The underlying mechanism of meiotic arrest has been widely explored in numerous studies. Many studies indicated that two cellular second messengers, cyclic adenosine monophosphate (cAMP) and cyclic guanosine monophosphate (cGMP) play an essential role in maintaining oocyte meiotic arrest. This review will discuss how these two cyclic nucleotides regulate oocyte maturation by blocking or initiating meiotic processes, and to provide an insight in future research.
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Affiliation(s)
- Bo Pan
- Department of Animal Biosciences, University of Guelph, 50 Stone Road E, Building #70, Guelph, ON, N1G 2W1, Canada
| | - Julang Li
- Department of Animal Biosciences, University of Guelph, 50 Stone Road E, Building #70, Guelph, ON, N1G 2W1, Canada.
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19
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Wang L, Song S, Liu X, Zhang M, Xiang W. Low MFN2 expression related to ageing in granulosa cells is associated with assisted reproductive technology outcome. Reprod Biomed Online 2018; 38:152-158. [PMID: 30593438 DOI: 10.1016/j.rbmo.2018.10.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Revised: 10/20/2018] [Accepted: 10/23/2018] [Indexed: 12/29/2022]
Abstract
RESEARCH QUESTION Is low MFN2 expression associated with ageing in granulosa cells as well as assisted reproductive technology (ART) outcome, and what is the underlying mechanism of action of MFN2? DESIGN In a prospective study, fresh granulosa cells were obtained from 161 women aged 20-40 years who underwent IVF with embryo transfer and who were divided into two groups: the diminished ovarian reserve (DOR) group (n = 51) and the control group (n = 110). Patient characteristics including age, infertility duration, body mass index, FSH, anti-Müllerian hormone (AMH), antral follicle count (AFC) and husband's semen parameters and granulosa cell MFN2 expression levels, cell apoptosis, mitochondrial membrane potential (ΔΨm) and ATP levels were analysed. RESULTS There were no significant differences between the DOR and control groups in terms of age, infertility duration and husband'' semen parameters; however, significant (P< 0.05) changes were found between the two groups in FSH, AMH and AFC levels. MFN2 expression was remarkably lower in granulosa cells from the DOR group and decreased in both groups as age increased. Furthermore, among young patients, MFN2 levels significantly increased in patients with pregnancy. MFN2 protein levels and cell apoptosis were lower in the MFN2 knockdown (MFN2-siRNA) group than in the control (Cy3-siRNA) group. ΔΨm and ATP levels were reduced in the MFN2-siRNA group compared with the Cy3-siRNA group. CONCLUSIONS Low MFN2 expression levels in granulosa cells were related to ageing, which may be involved in the clinical outcome of ART by promoting cell apoptosis and affecting mitochondrial function.
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Affiliation(s)
- Lingjuan Wang
- Family Planning Research Institute, Tongji Medical College, Huazhong University of Science and Technology, China; Centre of Reproductive Medicine, Tongji Medical College, Huazhong University of Science and Technology, China
| | - Su Song
- Centre of Reproductive Medicine, Tongji Medical College, Huazhong University of Science and Technology, China
| | - Xuemei Liu
- Reproductive Medicine Centre, Yantai Yuhuangding Hospital of Qingdao University, China
| | - Mengdi Zhang
- Family Planning Research Institute, Tongji Medical College, Huazhong University of Science and Technology, China; Centre of Reproductive Medicine, Tongji Medical College, Huazhong University of Science and Technology, China
| | - Wenpei Xiang
- Family Planning Research Institute, Tongji Medical College, Huazhong University of Science and Technology, China; Centre of Reproductive Medicine, Tongji Medical College, Huazhong University of Science and Technology, China.
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20
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Dos Santos JT, De Cesaro MP, Ferst JG, Pereira Dau AM, da Rosa PRA, Pasqual BM, Antoniazzi AQ, Gasperin BG, Bordignon V, Gonçalves PBD. Luteinizing hormone upregulates NPPC and downregulates NPR3 mRNA abundance in bovine granulosa cells through activation of the EGF receptor. Theriogenology 2018; 119:28-34. [PMID: 29960164 DOI: 10.1016/j.theriogenology.2018.06.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2018] [Revised: 05/25/2018] [Accepted: 06/17/2018] [Indexed: 12/14/2022]
Abstract
During folliculogenesis, the luteinizing hormone (LH) surge triggers dynamic events in granulosa cells that culminate with ovulation. The aim of this study was to evaluate if the epidermal growth factor receptor (EGFR) is required for ovulation in cattle, and if it regulates the expression of the natriuretic peptide (NP) system in granulosa cells after gonadotropin-releasing hormone (GnRH)/LH stimulation. It was observed that GnRH induces amphiregulin (AREG) and epiregulin (EREG) mRNA at 3 and 6 h after in vivo treatment, but the expression of these genes was not regulated by atrial (ANP) and C-type (CNP) NPs in granulosa cells cultured in vitro. The abundance of mRNA encoding the NP receptors (NPR1, 2 and 3) was not altered by LH supplementation and/or EGFR inhibition (AG1478; AG) in granulosa cells after 6 h of in vitro culture. However, in the same conditions, mRNA encoding the natriuretic peptide precursor C (NPPC) was upregulated by LH, whereas AG (0.5 and 5 μM) inhibited the LH effect. In order to confirm those results, 5 μM AG or saline were intrafollicularly injected in preovulatory follicles and cows were simultaneously treated with GnRH intramuscularly. Granulosa cells harvested at 6 h after GnRH injection revealed higher NPR3 and lower NPPC mRNA levels in AG-treated, compared to control cows. However, intrafollicular injection of AG did not inhibit GnRH-induced ovulation. In granulosa cells cultured in vitro, ANP associated with LH increased prostaglandin-endoperoxide synthase 2 (PTGS2) mRNA abundance. In conclusion, we inferred that LH modulated NPPC and NPR3 mRNA abundance through EGFR in bovine granulosa cells, but ovulation in cattle did not seem to depend on EGFR activation.
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Affiliation(s)
- Joabel T Dos Santos
- Federal Institute of Education, Science and Technology of Rio Grande do Sul (IFRS), Frederico Westphalen, Brazil
| | - Matheus P De Cesaro
- Laboratory of Biotechnology and Animal Reproduction - BioRep, Federal University of Santa Maria, Santa Maria, RS, Brazil; Faculty of Veterinary Medicine, Meridional Institute (IMED), Passo Fundo, RS, Brazil; Department of Animal Science, McGill University, Sainte Anne de Bellevue, QC, Canada
| | - Juliana G Ferst
- Laboratory of Biotechnology and Animal Reproduction - BioRep, Federal University of Santa Maria, Santa Maria, RS, Brazil
| | - Andressa M Pereira Dau
- Federal Institute of Education, Science and Technology of Rio Grande do Sul (IFRS), Rolante, Brazil
| | - Paulo R A da Rosa
- Laboratory of Biotechnology and Animal Reproduction - BioRep, Federal University of Santa Maria, Santa Maria, RS, Brazil
| | - Bruno M Pasqual
- Laboratory of Biotechnology and Animal Reproduction - BioRep, Federal University of Santa Maria, Santa Maria, RS, Brazil
| | - Alfredo Q Antoniazzi
- Laboratory of Biotechnology and Animal Reproduction - BioRep, Federal University of Santa Maria, Santa Maria, RS, Brazil
| | - Bernardo G Gasperin
- Department of Animal Pathology, Federal University of Pelotas, Capão do Leão, Brazil
| | - Vilceu Bordignon
- Department of Animal Science, McGill University, Sainte Anne de Bellevue, QC, Canada.
| | - Paulo B D Gonçalves
- Laboratory of Biotechnology and Animal Reproduction - BioRep, Federal University of Santa Maria, Santa Maria, RS, Brazil
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21
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Sahu K, Gupta A, Sharma A, Tiwari M, Pandey AN, Prasad S, Yadav PK, Pandey AK, Shrivastav TG, Chaube SK. Role of granulosa cell mitogen-activated protein kinase 3/1 in gonadotropin-mediated meiotic resumption from diplotene arrest of mammalian oocytes. Growth Factors 2018; 36:41-47. [PMID: 29842809 DOI: 10.1080/08977194.2018.1475372] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
In mammals, preovulatory oocytes are encircled by several layers of granulosa cells (GCs) in follicular microenvironment. These follicular oocytes are arrested at diplotene arrest due to high level of cyclic nucleotides from encircling GCs. Pituitary gonadotropin acts at the level of encircling GCs and increases adenosine 3',5'-cyclic monophosphate (cAMP) and guanosine 3',5'-cyclic monophosphate (cGMP) and activates mitogen-activated protein kinase 3/1 (MAPK3/1) signaling pathway. The MAPK3/1 disrupts the gap junctions between encircling GCs and oocyte. The disruption of gap junctions interrupts the transfer of cyclic nucleotides to the oocyte that results a drop in intraoocyte cAMP level. A transient decrease in oocyte cAMP level triggers maturation promoting factor (MPF) destabilization. The destabilized MPF finally triggers meiotic resumption from diplotene arrest in follicular oocyte. Thus, MAPK3/1 from GCs origin plays important role in gonadotropin-mediated meiotic resumption from diplotene arrest in follicular oocyte of mammals.
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Affiliation(s)
- Kankshi Sahu
- a Cell Physiology Laboratory, Department of Zoology , Institute of Science, Banaras Hindu University , Varanasi , India
| | - Anumegha Gupta
- a Cell Physiology Laboratory, Department of Zoology , Institute of Science, Banaras Hindu University , Varanasi , India
| | - Alka Sharma
- a Cell Physiology Laboratory, Department of Zoology , Institute of Science, Banaras Hindu University , Varanasi , India
| | - Meenakshi Tiwari
- a Cell Physiology Laboratory, Department of Zoology , Institute of Science, Banaras Hindu University , Varanasi , India
| | - Ashutosh N Pandey
- a Cell Physiology Laboratory, Department of Zoology , Institute of Science, Banaras Hindu University , Varanasi , India
| | - Shilpa Prasad
- a Cell Physiology Laboratory, Department of Zoology , Institute of Science, Banaras Hindu University , Varanasi , India
| | - Pramod K Yadav
- a Cell Physiology Laboratory, Department of Zoology , Institute of Science, Banaras Hindu University , Varanasi , India
| | - Ajai K Pandey
- b Department of Kayachikitsa, Faculty of Ayurveda , Banaras Hindu University , Varanasi , India
| | - Tulsidas G Shrivastav
- c Department of Reproductive Biomedicine , National Institute of Health and Family Welfare , New Delhi , India
| | - Shail K Chaube
- a Cell Physiology Laboratory, Department of Zoology , Institute of Science, Banaras Hindu University , Varanasi , India
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Molecular Mechanisms of Prophase I Meiotic Arrest Maintenance and Meiotic Resumption in Mammalian Oocytes. Reprod Sci 2018; 26:1519-1537. [DOI: 10.1177/1933719118765974] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Mechanisms of meiotic prophase I arrest maintenance (germinal vesicle [GV] stage) and meiotic resumption (germinal vesicle breakdown [GVBD] stage) in mammalian oocytes seem to be very complicated. These processes are regulated via multiple molecular cascades at transcriptional, translational, and posttranslational levels, and many of them are interrelated. There are many molecular cascades of meiosis maintaining and meiotic resumption in oocyte which are orchestrated by multiple molecules produced by pituitary gland and follicular cells. Furthermore, many of these molecular cascades are duplicated, thus ensuring the stability of the entire system. Understanding mechanisms of oocyte maturation is essential to assess the oocyte status, develop effective protocols of oocyte in vitro maturation, and design novel contraceptive drugs. Mechanisms of meiotic arrest maintenance at prophase I and meiotic resumption in mammalian oocytes are covered in the present article.
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Current perspectives on in vitro maturation and its effects on oocyte genetic and epigenetic profiles. SCIENCE CHINA-LIFE SCIENCES 2018; 61:633-643. [PMID: 29569023 DOI: 10.1007/s11427-017-9280-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Accepted: 12/26/2017] [Indexed: 12/14/2022]
Abstract
In vitro maturation (IVM), the maturation in culture of immature oocytes, has been used in clinic for more than 20 years. Although IVM has the specific advantages of low cost and minor side effects over controlled ovarian stimulation, the prevalence of IVM is less than 1% of routine in vitro fertilization and embryo transfer techniques in many reproductive centers. In this review, we searched the MEDLINE database for all full texts and/or abstract articles published in English with content related to oocyte IVM mainly between 2000 and 2016. Many different aspects of the IVM method may influence oocyte potential, including priming, gonadotrophin, growth factors, and culture times. The culture conditions of IVM result in alterations in the oocyte or cumulus cell transcriptome that are not observed under in vivo culture conditions. Additionally, epigenetic modifications, such as DNA methylation or acetylation, are also different between in vitro and in vivo cultured oocytes. In sum, current IVM technique is still not popular and requires more systematic and intensive research to improve its effects and applications. This review will help point our problems, supply evidence or clues for future improving IVM technique, thus assist patients for fertility treatment or preservation as an additional option.
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Macías-García B, González-Fernández L, Matilla E, Hernández N, Mijares J, Sánchez-Margallo FM. Oocyte holding in the Iberian red deer (Cervus elaphus hispanicus): Effect of initial oocyte quality and epidermal growth factor addition on in vitro maturation. Reprod Domest Anim 2017; 53:243-248. [PMID: 29110393 DOI: 10.1111/rda.13099] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Accepted: 09/19/2017] [Indexed: 11/29/2022]
Abstract
Current in vitro embryo production protocols in the Iberian red deer (Cervus elaphus hispanicus) need to be optimized; oocyte harvesting in situ followed by overnight holding could reduce the human effort and shipping costs. In our work, post-mortem ovaries were retrieved, and the oocytes were harvested and allocated to G1 group (good quality) or G2 + G3 group (low quality). The oocytes were separately subjected to immediate in vitro maturation (IVM) or held overnight in a holding medium composed of 40% of TCM 199 with Earle's salts, 40% TCM 199 with Hanks' salts and 20% fetal bovine serum (FBS), at room temperature (16 hr). In vitro maturation was carried out in a basal medium supplemented or not with 50 ng/ml of epidermal growth factor (EGF). Our data showed that addition of EGF to the maturation medium increases the percentage of G1 oocytes reaching metaphase II (3.9% vs. 50%, basal vs. EGF; p < .001) and decreased their degeneration rate (69.9% vs. 22.2%, basal vs. EGF; p < .01) when oocytes were immediately matured. Overnight holding increased the meiotic competence of G1 oocytes (37.5% matured in basal medium) and EGF increased prophase arrest in G2 + G3 oocytes (16.1% vs. 38.8% in germinal vesicle [GV] stage in basal medium vs. EGF added medium; p < .05). Our data demonstrate that oocyte holding can be used in Iberian red deer oocytes. Interestingly, EGF addition increases the oocytes' meiotic competence in immediately matured oocytes but not after oocyte holding depending upon initial oocyte quality.
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Affiliation(s)
- B Macías-García
- Jesús Usón Minimally Invasive Surgery Centre, Cáceres, Spain
| | - L González-Fernández
- Research Group of Intracellular Signalling and Technology of Reproduction (SINTREP), Institute of Biotechnology in Agriculture and Livestock (INBIO G+C), University of Extremadura, Cáceres, Spain
| | - E Matilla
- Jesús Usón Minimally Invasive Surgery Centre, Cáceres, Spain
| | - N Hernández
- Jesús Usón Minimally Invasive Surgery Centre, Cáceres, Spain
| | - J Mijares
- Jesús Usón Minimally Invasive Surgery Centre, Cáceres, Spain
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Sun W, Liu C, Feng Y, Zhuo G, Zhou W, Fei X, Zhang Z. Macrophage colony-stimulating factor (M-CSF) is an intermediate in the process of luteinizing hormone-induced decrease in natriuretic peptide receptor 2 (NPR2) and resumption of oocyte meiosis. J Ovarian Res 2017; 10:68. [PMID: 28978329 PMCID: PMC5628418 DOI: 10.1186/s13048-017-0364-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Accepted: 09/26/2017] [Indexed: 11/12/2022] Open
Abstract
Background Luteinizing hormone (LH) regulation of the ligand, natriuretic peptide precursor type C, and its receptor, natriuretic peptide receptor 2 (NPR2), is critical for oocyte maturation; however, the mechanism is not fully understood. Macrophage colony-stimulating factor (M-CSF) has recently been shown to be involved in oocyte maturation and ovulation. In the present study we determined whether or not M-CSF plays a role in the intermediate signal that mediates LH regulation of NPR2 in resumption of oocyte meiosis. Methods Immature female C57BL/6 mice were injected i.p. with 5 IU of equine chorionic gonadotropin (eCG) to stimulate follicle development. After 44–48 h, the eCG-stimulated mice were injected i.p. with an ovulatory dose of 5 IU of human chorionic gonadotropin (hCG). The ovaries were excised at selected times. Pre-ovulatory follicles (POFs) and cumulus-oocyte complexes were cultured in different media. Immunohistochemical and quantitative real-time PCR analyses were used to assess the expression of M-CSF, M-CSF receptor (M-CSF-R), and NPR2. The presence of germinal vesicle breakdown (GVBD) was examined under a stereomicroscope to morphologically evaluate resumption of oocyte meiosis. Results NPR2 was mainly expressed in cumulus cells of pre-ovulatory follicles, while M-CSF and M-CSF-R were expressed in both mural granulosa and cumulus cells. The levels of M-CSF/M-CSF-R and NPR2 decreased within 4 h after treatment of hCG. M-CSF not only reduced the expression of NPR2 mRNA via its receptor (M-CSF-R), but also increased the proportion of GVBD in oocytes. Conclusion M-CSF serves as an intermediate signal, thus inducing a vital decrease in the NPR2 levels in cumulus cells, and regulates the process of LH-induced resumption of meiosis.
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Affiliation(s)
- Wenchao Sun
- Center of Reductive Medicine, Hangzhou Obstetrics and Gynecology Hospital, Nanjing Medical University, Hangzhou, China
| | - Chang Liu
- Department of Gynecology, Hangzhou First People's Hospital, Nanjing Medical University, Hangzhou, China
| | - Ying Feng
- Division of Embryo Laboratory, Center of Reductive Medicine, Hangzhou Obstetrics and Gynecology Hospital, Nanjing Medical University, Hangzhou, China
| | - Guangchao Zhuo
- Central Laboratory, Hangzhou First People's Hospital, Nanjing Medical University, Hangzhou, China
| | - Wenjing Zhou
- Division of Embryo Laboratory, Center of Reductive Medicine, Hangzhou Obstetrics and Gynecology Hospital, Nanjing Medical University, Hangzhou, China
| | - Xiaoyang Fei
- Center of Reductive Medicine, Hangzhou Obstetrics and Gynecology Hospital, Nanjing Medical University, Hangzhou, China
| | - Zhifen Zhang
- Department of Gynecological Endocrinology, Hangzhou Obstetrics and Gynecology Hospital, Nanjing Medical University, 369 Kunpeng Road, Hangzhou, 310008, China.
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Xi G, An L, Jia Z, Tan K, Zhang J, Wang Z, Zhang C, Miao K, Wu Z, Tian J. Natriuretic peptide receptor 2 (NPR2) localized in bovine oocyte underlies a unique mechanism for C-type natriuretic peptide (CNP)-induced meiotic arrest. Theriogenology 2017; 106:198-209. [PMID: 29080478 DOI: 10.1016/j.theriogenology.2017.09.003] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Revised: 09/01/2017] [Accepted: 09/02/2017] [Indexed: 01/13/2023]
Abstract
Meiosis is of prime importance for successful gametogenesis, and insufficient maintenance of oocyte meiotic arrest compromises oocyte developmental competence. Recent studies have demonstrated that the C-type natriuretic peptide (CNP)-Natriuretic peptide receptor 2 (NPR2) pathway can inhibit mammalian oocyte meiotic resumption. In mouse and porcine, the inhibitory effect of mural granulosa cell (MGC)-derived CNP on oocyte meiotic resumption is mediated by NPR2 localized in cumulus cells (CCs) surrounding the oocytes. However, in the present study, we identified a novel mechanism for CNP-induced meiotic arrest that appears to be unique to bovine oocytes. Unlike mouse and porcine, bovine NPR2 not only localizes in CCs, but also in oocyte membranes. We also showed that CNP can directly activate intra-oocyte cGMP production via NPR2 localized in oocyte membranes, in parallel with the CC-mediated pathway. Furthermore, we demonstrated that Npr2 expression in bovine CCs and oocytes were synergistically regulated by estradiol and oocyte-derived growth factors. Finally, based on the profound inhibitory effect of CNP on meiotic resumption, we established a natural factor synchronized in vitro oocyte maturation (NFSOM) system, which can significantly improve the developmental competence of matured oocytes, thereby resulting in higher in vitro embryo production efficiency. Taken together, our study not only provides new insight into understanding the crosstalk between oocytes and follicular somatic cells in mammals, but also presents a promising strategy for improving the in vitro oocyte maturation systems of assisted reproductive technology (ART).
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Affiliation(s)
- Guangyin Xi
- National Engineering Laboratory for Animal Breeding, College of Animal Sciences and Technology, China Agricultural University, Beijing 100193, China
| | - Lei An
- National Engineering Laboratory for Animal Breeding, College of Animal Sciences and Technology, China Agricultural University, Beijing 100193, China
| | - Zhenwei Jia
- National Engineering Laboratory for Animal Breeding, College of Animal Sciences and Technology, China Agricultural University, Beijing 100193, China; College of Animal Science and Technology, Inner Mongolia University for the Nationalities, Inner Mongolia 028000, China
| | - Kun Tan
- National Engineering Laboratory for Animal Breeding, College of Animal Sciences and Technology, China Agricultural University, Beijing 100193, China
| | - Jiaxin Zhang
- Key Laboratory of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Inner Mongolia Agriculture University, Inner Mongolia 010018, China
| | - Zhuqing Wang
- National Engineering Laboratory for Animal Breeding, College of Animal Sciences and Technology, China Agricultural University, Beijing 100193, China
| | - Chao Zhang
- National Engineering Laboratory for Animal Breeding, College of Animal Sciences and Technology, China Agricultural University, Beijing 100193, China
| | - Kai Miao
- National Engineering Laboratory for Animal Breeding, College of Animal Sciences and Technology, China Agricultural University, Beijing 100193, China
| | - Zhonghong Wu
- National Engineering Laboratory for Animal Breeding, College of Animal Sciences and Technology, China Agricultural University, Beijing 100193, China
| | - Jianhui Tian
- National Engineering Laboratory for Animal Breeding, College of Animal Sciences and Technology, China Agricultural University, Beijing 100193, China.
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Tiwari M, Gupta A, Sharma A, Prasad S, Pandey AN, Yadav PK, Pandey AK, Shrivastav TG, Chaube SK. Role of Mitogen Activated Protein Kinase and Maturation Promoting Factor During the Achievement of Meiotic Competency in Mammalian Oocytes. J Cell Biochem 2017; 119:123-129. [DOI: 10.1002/jcb.26184] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Accepted: 06/01/2017] [Indexed: 12/25/2022]
Affiliation(s)
- Meenakshi Tiwari
- Cell Physiology LaboratoryDepartment of ZoologyInstitute of ScienceBanaras Hindu UniversityVaranasiUttar Pradesh 221005India
| | - Anumegha Gupta
- Cell Physiology LaboratoryDepartment of ZoologyInstitute of ScienceBanaras Hindu UniversityVaranasiUttar Pradesh 221005India
| | - Alka Sharma
- Cell Physiology LaboratoryDepartment of ZoologyInstitute of ScienceBanaras Hindu UniversityVaranasiUttar Pradesh 221005India
| | - Shilpa Prasad
- Cell Physiology LaboratoryDepartment of ZoologyInstitute of ScienceBanaras Hindu UniversityVaranasiUttar Pradesh 221005India
| | - Ashutosh N. Pandey
- Cell Physiology LaboratoryDepartment of ZoologyInstitute of ScienceBanaras Hindu UniversityVaranasiUttar Pradesh 221005India
| | - Pramod K. Yadav
- Cell Physiology LaboratoryDepartment of ZoologyInstitute of ScienceBanaras Hindu UniversityVaranasiUttar Pradesh 221005India
| | - Ajai K. Pandey
- Faculty of AyurvedaDepartment of KayachikitsaBanaras Hindu UniversityVaranasiUttar Pradesh 221005India
| | - Tulsidas G. Shrivastav
- Department of Reproductive BiomedicineNational Institute of Health and Family WelfareBaba Gang Nath MargMunirkaNew Delhi 110067India
| | - Shail K. Chaube
- Cell Physiology LaboratoryDepartment of ZoologyInstitute of ScienceBanaras Hindu UniversityVaranasiUttar Pradesh 221005India
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Zhao Y, Zhang Y, Li J, Zheng N, Xu X, Yang J, Xia G, Zhang M. MAPK3/1 participates in the activation of primordial follicles through mTORC1-KITL signaling. J Cell Physiol 2017; 233:226-237. [PMID: 28218391 DOI: 10.1002/jcp.25868] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Accepted: 02/17/2017] [Indexed: 12/13/2022]
Abstract
The majority of ovarian primordial follicles are preserved in a dormant state to maintain the female reproductive lifespan, and only a few primordial follicles are activated to enter the growing follicle pool in each wave. Recent studies have shown that primordial follicular activation depends on mammalian target of rapamycin complex 1 (mTORC1)-KIT ligand (KITL) signaling in pre-granulosa cells and its receptor (KIT)-phosphoinositol 3 kinase (PI3K) signaling in oocytes. However, the upstream regulator of mTORC1 signaling is unclear. The results of the present study showed that the phosphorylated mitogen-activated protein kinase3/1 (MAPK3/1) protein is expressed in some primordial follicles and all growing follicles. Culture of 3 days post-parturition (dpp) ovaries with the MAPK3/1 signaling inhibitor U0126 significantly reduced the number of activated follicles and was accompanied by dramatically reduced granulosa cell proliferation and increased oocyte apoptosis. Western blot and immunofluorescence analyses showed that U0126 significantly decreased the phosphorylation levels of Tsc2, S6K1, and rpS6 and the expression of KITL, indicating that U0126 inhibits mTORC1-KITL signaling. Furthermore, U0126 decreased the phosphorylation levels of Akt, resulting in a decreased number of oocytes with Foxo3 nuclear export. To further investigate MAPK3/1 signaling in primordial follicle activation, we used phosphatase and tensin homolog deleted on chromosome 10 (PTEN) inhibitor bpV(HOpic) to promote primordial follicle activation. In this model, U0126 also inhibited the activation of primordial follicles and mTORC1 signaling. Thus, these results suggest that MAPK3/1 participates in primordial follicle activation through mTORC1-KITL signaling.
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Affiliation(s)
- Yu Zhao
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, People's Republic of China
| | - Yu Zhang
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, People's Republic of China
| | - Jia Li
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, People's Republic of China
| | - Nana Zheng
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, People's Republic of China
| | - Xiaoting Xu
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, People's Republic of China
| | - Jing Yang
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, People's Republic of China
| | - Guoliang Xia
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, People's Republic of China
| | - Meijia Zhang
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, People's Republic of China
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29
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Jaffe LA, Egbert JR. Regulation of Mammalian Oocyte Meiosis by Intercellular Communication Within the Ovarian Follicle. Annu Rev Physiol 2017; 79:237-260. [PMID: 27860834 PMCID: PMC5305431 DOI: 10.1146/annurev-physiol-022516-034102] [Citation(s) in RCA: 157] [Impact Index Per Article: 22.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Meiotic progression in mammalian preovulatory follicles is controlled by the granulosa cells around the oocyte. Cyclic GMP (cGMP) generated in the granulosa cells diffuses through gap junctions into the oocyte, maintaining meiotic prophase arrest. Luteinizing hormone then acts on receptors in outer granulosa cells to rapidly decrease cGMP. This occurs by two complementary pathways: cGMP production is decreased by dephosphorylation and inactivation of the NPR2 guanylyl cyclase, and cGMP hydrolysis is increased by activation of the PDE5 phosphodiesterase. The cGMP decrease in the granulosa cells results in rapid cGMP diffusion out of the oocyte, initiating meiotic resumption. Additional, more slowly developing mechanisms involving paracrine signaling by extracellular peptides (C-type natriuretic peptide and EGF receptor ligands) maintain the low level of cGMP in the oocyte. These coordinated signaling pathways ensure a fail-safe system to prepare the oocyte for fertilization and reproductive success.
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Affiliation(s)
- Laurinda A Jaffe
- Department of Cell Biology, University of Connecticut Health Center, Farmington, Connecticut 06030; ,
| | - Jeremy R Egbert
- Department of Cell Biology, University of Connecticut Health Center, Farmington, Connecticut 06030; ,
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30
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Wang Y, Hao X, Yang J, Li J, Zhang M. CREB activity is required for luteinizing hormone-induced the expression of EGF-like factors. Mol Reprod Dev 2016; 83:1116-1127. [DOI: 10.1002/mrd.22753] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2016] [Accepted: 10/14/2016] [Indexed: 12/11/2022]
Affiliation(s)
- Yakun Wang
- State Key Laboratory for Agrobiotechnology; College of Biological Sciences, China Agricultural University; Beijing People's Republic of China
| | - Xiaoqiong Hao
- State Key Laboratory for Agrobiotechnology; College of Biological Sciences, China Agricultural University; Beijing People's Republic of China
| | - Jing Yang
- State Key Laboratory for Agrobiotechnology; College of Biological Sciences, China Agricultural University; Beijing People's Republic of China
| | - Jia Li
- State Key Laboratory for Agrobiotechnology; College of Biological Sciences, China Agricultural University; Beijing People's Republic of China
| | - Meijia Zhang
- State Key Laboratory for Agrobiotechnology; College of Biological Sciences, China Agricultural University; Beijing People's Republic of China
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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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Finley J. Oocyte activation and latent HIV-1 reactivation: AMPK as a common mechanism of action linking the beginnings of life and the potential eradication of HIV-1. Med Hypotheses 2016; 93:34-47. [PMID: 27372854 DOI: 10.1016/j.mehy.2016.05.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Accepted: 05/12/2016] [Indexed: 01/22/2023]
Abstract
In all mammalian species studied to date, the initiation of oocyte activation is orchestrated through alterations in intracellular calcium (Ca(2+)) signaling. Upon sperm binding to the oocyte plasma membrane, a sperm-associated phospholipase C (PLC) isoform, PLC zeta (PLCζ), is released into the oocyte cytoplasm. PLCζ hydrolyzes phosphatidylinositol 4,5-bisphosphate (PIP2) to produce diacylglycerol (DAG), which activates protein kinase C (PKC), and inositol 1,4,5-trisphosphate (IP3), which induces the release of Ca(2+) from endoplasmic reticulum (ER) Ca(2+) stores. Subsequent Ca(2+) oscillations are generated that drive oocyte activation to completion. Ca(2+) ionophores such as ionomycin have been successfully used to induce artificial human oocyte activation, facilitating fertilization during intra-cytoplasmic sperm injection (ICSI) procedures. Early studies have also demonstrated that the PKC activator phorbol 12-myristate 13-acetate (PMA) acts synergistically with Ca(2+) ionophores to induce parthenogenetic activation of mouse oocytes. Interestingly, the Ca(2+)-induced signaling cascade characterizing sperm or chemically-induced oocyte activation, i.e. the "shock and live" approach, bears a striking resemblance to the reactivation of latently infected HIV-1 viral reservoirs via the so called "shock and kill" approach, a method currently being pursued to eradicate HIV-1 from infected individuals. PMA and ionomycin combined, used as positive controls in HIV-1 latency reversal studies, have been shown to be extremely efficient in reactivating latent HIV-1 in CD4(+) memory T cells by inducing T cell activation. Similar to oocyte activation, T cell activation by PMA and ionomycin induces an increase in intracellular Ca(2+) concentrations and activation of DAG, PKC, and downstream Ca(2+)-dependent signaling pathways necessary for proviral transcription. Interestingly, AMPK, a master regulator of cell metabolism that is activated thorough the induction of cellular stress (e.g. increase in Ca(2+) concentration, reactive oxygen species generation, increase in AMP/ATP ratio) is essential for oocyte maturation, T cell activation, and mitochondrial function. In addition to the AMPK kinase LKB1, CaMKK2, a Ca(2+)/calmodulin-dependent kinase that also activates AMPK, is present in and activated on T cell activation and is also present in mouse oocytes and persists until the zygote and two-cell stages. It is our hypothesis that AMPK activation represents a central node linking T cell activation-induced latent HIV-1 reactivation and both physiological and artificial oocyte activation. We further propose the novel observation that various compounds that have been shown to reactivate latent HIV-1 (e.g. PMA, ionomycin, metformin, bryostatin, resveratrol, etc.) or activate oocytes (PMA, ionomycin, ethanol, puromycin, etc.) either alone or in combination likely do so via stress-induced activation of AMPK.
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Egbert JR, Uliasz TF, Shuhaibar LC, Geerts A, Wunder F, Kleiman RJ, Humphrey JM, Lampe PD, Artemyev NO, Rybalkin SD, Beavo JA, Movsesian MA, Jaffe LA. Luteinizing Hormone Causes Phosphorylation and Activation of the cGMP Phosphodiesterase PDE5 in Rat Ovarian Follicles, Contributing, Together with PDE1 Activity, to the Resumption of Meiosis. Biol Reprod 2016; 94:110. [PMID: 27009040 PMCID: PMC4939740 DOI: 10.1095/biolreprod.115.135897] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Accepted: 03/14/2016] [Indexed: 12/16/2022] Open
Abstract
The meiotic cell cycle of mammalian oocytes in preovulatory follicles is held in prophase arrest by diffusion of cGMP from the surrounding granulosa cells into the oocyte. Luteinizing hormone (LH) then releases meiotic arrest by lowering cGMP in the granulosa cells. The LH-induced reduction of cGMP is caused in part by a decrease in guanylyl cyclase activity, but the observation that the cGMP phosphodiesterase PDE5 is phosphorylated during LH signaling suggests that an increase in PDE5 activity could also contribute. To investigate this idea, we measured cGMP-hydrolytic activity in rat ovarian follicles. Basal activity was due primarily to PDE1A and PDE5, and LH increased PDE5 activity. The increase in PDE5 activity was accompanied by phosphorylation of PDE5 at serine 92, a protein kinase A/G consensus site. Both the phosphorylation and the increase in activity were promoted by elevating cAMP and opposed by inhibiting protein kinase A, supporting the hypothesis that LH activates PDE5 by stimulating its phosphorylation by protein kinase A. Inhibition of PDE5 activity partially suppressed LH-induced meiotic resumption as indicated by nuclear envelope breakdown, but inhibition of both PDE5 and PDE1 activities was needed to completely inhibit this response. These results show that activities of both PDE5 and PDE1 contribute to the LH-induced resumption of meiosis in rat oocytes, and that phosphorylation and activation of PDE5 is a regulatory mechanism.
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Affiliation(s)
- Jeremy R Egbert
- Department of Cell Biology, University of Connecticut Health Center, Farmington, Connecticut
| | - Tracy F Uliasz
- Department of Cell Biology, University of Connecticut Health Center, Farmington, Connecticut
| | - Leia C Shuhaibar
- Department of Cell Biology, University of Connecticut Health Center, Farmington, Connecticut
| | - Andreas Geerts
- Bayer Pharma AG, Pharma Research Center, Wuppertal, Germany
| | - Frank Wunder
- Bayer Pharma AG, Pharma Research Center, Wuppertal, Germany
| | - Robin J Kleiman
- Translational Neuroscience Center, Boston Children's Hospital, Boston, Massachusetts
| | - John M Humphrey
- Pfizer Worldwide Research & Development, Groton, Connecticut
| | - Paul D Lampe
- Translational Research Program, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Nikolai O Artemyev
- Department of Molecular Physiology and Biophysics, University of Iowa, Iowa City, Iowa
| | - Sergei D Rybalkin
- Department of Pharmacology, University of Washington, Seattle, Washington
| | - Joseph A Beavo
- Department of Pharmacology, University of Washington, Seattle, Washington
| | - Matthew A Movsesian
- Cardiology Section, VA Salt Lake City Health Care System and Division of Cardiovascular Medicine, University of Utah School of Medicine, Salt Lake City, Utah
| | - Laurinda A Jaffe
- Department of Cell Biology, University of Connecticut Health Center, Farmington, Connecticut
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Yang L, Wei Q, Li W, Xi Q, Zhao X, Ma B. NPR2 is involved in FSH-mediated mouse oocyte meiotic resumption. J Ovarian Res 2016; 9:6. [PMID: 26880031 PMCID: PMC4754804 DOI: 10.1186/s13048-016-0218-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Accepted: 02/09/2016] [Indexed: 11/22/2022] Open
Abstract
Background Previous studies have reported that follicle-stimulating hormone (FSH) is often added to culture media to induce oocyte meiotic resumption and maturation and to improve subsequent embryonic development during in vitro maturation (IVM). However, the underlying mechanisms remain unclear. Methods Cumulus-oocyte complexes (COCs) were collected from ovaries 46–48 h after the female mice were intraperitoneally injected with 8 IU equine chorionic gonadotropin (eCG) and then the COCs were cultured in different medium. qRT-PCR analysis was used to assess mRNA expression of EGF-like factors and natriuretic peptide receptor 2 (NPR2). Western Blot analysis was used to assess phosphorylation of mitogen-activated protein kinase 3/1 (MAPK3/1). The oocytes were morphologically assessed for meiotic resumption. Results FSH stimulated the expression of EGF-like factors, the activation of MAPK3/1, a decrease in NPR2 mRNA and oocyte meiotic resumption. Moreover, the FSH-induced decrease in NPR2 and oocyte meiotic resumption occurred via the MAPK3/1 singling pathway, which was activated by the epidermal growth factor receptor (EGFR) pathway. Conclusions NPR2 is involved in FSH-mediated oocyte meiotic resumption, and this process is associated with the EGFR and MAPK3/1 signaling pathways.
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Affiliation(s)
- Lei Yang
- Key Laboratory of Animal Biotechnology of the Ministry of Agriculture, Northwest A&F University, Yangling, Shaanxi, 712100, China. .,College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, 712100, People's Republic of China.
| | - Qiang Wei
- Key Laboratory of Animal Biotechnology of the Ministry of Agriculture, Northwest A&F University, Yangling, Shaanxi, 712100, China. .,College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, 712100, People's Republic of China.
| | - Wei Li
- Key Laboratory of Animal Biotechnology of the Ministry of Agriculture, Northwest A&F University, Yangling, Shaanxi, 712100, China. .,College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, 712100, People's Republic of China.
| | - Qihui Xi
- Key Laboratory of Animal Biotechnology of the Ministry of Agriculture, Northwest A&F University, Yangling, Shaanxi, 712100, China. .,College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, 712100, People's Republic of China.
| | - Xiaoe Zhao
- Key Laboratory of Animal Biotechnology of the Ministry of Agriculture, Northwest A&F University, Yangling, Shaanxi, 712100, China. .,College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, 712100, People's Republic of China.
| | - Baohua Ma
- Key Laboratory of Animal Biotechnology of the Ministry of Agriculture, Northwest A&F University, Yangling, Shaanxi, 712100, China. .,College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, 712100, People's Republic of China.
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Cordeiro CN, Christianson MS, Selter JH, Segars JH. In Vitro Activation: A Possible New Frontier for Treatment of Primary Ovarian Insufficiency. Reprod Sci 2016; 23:429-38. [PMID: 26787101 DOI: 10.1177/1933719115625842] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
In vitro activation (IVA) represents a new frontier in the treatment of women with primary ovarian insufficiency as well as patients with cancer desiring fertility preservation. Here, we review the biological basis of IVA and the recent translation of IVA to humans by targeting Hippo and Akt-signaling pathways. We then provide a new integrated viewpoint on IVA, highlighting basic science research on the aspects of follicular development and ovarian tissue transplantation which may potentially optimize future translational research on IVA. Specific topics discussed include cryopreservation techniques, additional IVA pathway targets, the roles of actin polymerization, paracrine and endocrine factors, and the role of mechanical signaling and associated tissue rigidity in controlling ovarian follicular activation. Further research and improved understanding is needed to optimize success of IVA.
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Affiliation(s)
- Christina N Cordeiro
- Department of Gynecology & Obstetrics, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Mindy S Christianson
- Department of Gynecology & Obstetrics-Reproductive Endocrinology and Infertility, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | | | - James H Segars
- Division of Reproductive Sciences and Women's Health Research, Department of Gynecology & Obstetrics-Reproductive Endocrinology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
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36
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Xie L, Tang Q, Yang L, Chen L. Insulin-like growth factor I promotes oocyte maturation through increasing the expression and phosphorylation of epidermal growth factor receptor in the zebrafish ovary. Mol Cell Endocrinol 2016; 419:198-207. [PMID: 26599586 DOI: 10.1016/j.mce.2015.10.018] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Revised: 10/03/2015] [Accepted: 10/21/2015] [Indexed: 11/15/2022]
Abstract
The resumption of oocyte meiosis is a critical step for the progression of oocyte development, which requires an intimate collaboration of a variety of hormones and growth factors. Insulin-like growth factor I (IGF-I) and epidermal growth factor (EGF) family are well recognized to promote oocyte maturation. However, the mechanism by which they coordinate this process remains unknown. The present study demonstrated that IGF-I can increase egfr mRNA and protein levels in follicle cell culture or intact follicles. This stimulation can be significantly inhibited by IGF-IR specific inhibitor, NVP-ADW742. The inhibitors against phosphatidylinositol-3-kinase (PI3K), phosphoinositide-dependent protein kinase 1 (PDK1) and Akt also dramatically abolished IGF-I-induced egfr expression, suggesting that the classical PI3K/Akt pathway mediated the action of IGF-I in this regulation. We further found that not only was the protein level of Egfr increased, but also the phosphorylation level was enhanced by IGF-I. Unlike egfr, IGF-I failed to stimulate the expression of Egf-like ligands whereas decreased the level of protein-tyrosine phosphatase, receptor type, kappa (ptprk), a protein tyrosine phosphatase. The oocyte maturation assay further confirmed that IGF-I initiates this regulation through its cognate receptor in the follicle cells. Taken together, IGF-I promoted oocyte maturation, in part at least, through Egf-like ligands/Egfr pathway. This study sheds light on the cross-talk between two important growth factors in the zebrafish ovary and the mechanism underlying the IGF-I induction on oocyte maturation.
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Affiliation(s)
- Lin Xie
- Institute of Organ Transplantation, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Key Laboratory of Organ Transplantation, Ministry of Health, and Key Laboratory of Organ Transplantation, Ministry of Education, Wuhan 430030, China.
| | | | - Ling Yang
- The Department of Infectious Diseases, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou 510120, China
| | - Lianyi Chen
- Hubei Medical Association, Wuhan 430071, China
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Celik O, Celik N, Gungor S, Haberal ET, Aydin S. Selective Regulation of Oocyte Meiotic Events Enhances Progress in Fertility Preservation Methods. BIOCHEMISTRY INSIGHTS 2015; 8:11-21. [PMID: 26417205 PMCID: PMC4577271 DOI: 10.4137/bci.s28596] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Revised: 08/23/2015] [Accepted: 08/24/2015] [Indexed: 11/15/2022]
Abstract
Following early embryonic germ cell migration, oocytes are surrounded by somatic cells and remain arrested at diplotene stage until luteinizing hormone (LH) surge. Strict regulation of both meiotic arrest and meiotic resumption during dormant stage are critical for future fertility. Inter-cellular signaling system between the somatic compartment and oocyte regulates these meiotic events and determines the follicle quality. As well as the collected number of eggs, their qualities are also important for in vitro fertilization (IVF) outcome. In spontaneous and IVF cycles, germinal vesicle (GV)–stage oocytes, premature GV breakdown, and persistence of first meiotic arrest limit the reproductive performance. Likewise, both women with premature ovarian aging and young cancer women are undergoing chemoradiotherapy under the risk of follicle loss because of unregulated meiotic events. Understanding of oocyte meiotic events is therefore critical for the prevention of functional ovarian reserve. High levels of cyclic guanosine monophophate (cGMP), cyclic adenosine monophophate (cAMP) and low phosphodiesterase (PDE) 3A enzyme activity inside the oocyte are responsible for maintaining of meiotic arrest before the LH surge. cGMP is produced in the somatic compartment, and natriuretic peptide precursor C (Nppc) and natriuretic peptide receptor 2 (Npr2) regulate its production. cGMP diffuses into the oocyte and reduces the PDE3A activity, which inhibits the conversion of cAMP to the 5′AMP, and cAMP levels are enhanced. In addition, oocyte itself has the ability to produce cAMP. Taken together, accumulation of cAMP inside the oocyte induces protein kinase activity, which leads to the inhibition of maturation-promoting factor and meiotic arrest also continues. By stimulating the expression of epidermal growth factor, LH inhibits the Nppc/Npr2 system, blocks cGMP synthesis, and initiates meiotic resumption. Oocytes lacking the functional of this pathway may lead to persistence of the GV oocyte, which reduces the number of good quality eggs. Selective regulation of somatic cell signals and oocyte meiotic events enhance progress in fertility preservation methods, which may give us the opportunity to prevent follicle loss in prematurely aging women and young women with cancer are undergoing chemoradiotherapy.
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Affiliation(s)
- Onder Celik
- Private Clinic, Obstetrics and Gynecology, Usak, Turkey
| | - Nilufer Celik
- Behçet Uz Children's Hospital, Department of Biochemistry, İzmir, Turkey
| | - Sami Gungor
- Private Medical Hospital, Obstetrics and Gynecology, Elazig, Turkey
| | - Esra Tustas Haberal
- Umraniye Education and Research Hospital, Obstetrics and Gynecology, İstanbul, Turkey
| | - Suleyman Aydin
- Department of Medical Biochemistry (Firat Hormone Research Group), School of Medicine, Firat University, Elazig, Turkey
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Combination effects of epidermal growth factor and glial cell line-derived neurotrophic factor on the in vitro developmental potential of porcine oocytes. ZYGOTE 2015; 24:465-76. [PMID: 26350562 DOI: 10.1017/s0967199415000416] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
The developmental potential of in vitro matured porcine oocytes is still lower than that of oocytes matured and fertilized in vivo. Major problems that account for the lower efficiency of in vitro production include the improper nuclear and cytoplasmic maturation of oocytes. With the aim of improving this issue, the single and combined effects of epidermal growth factor (EGF) and glial cell line-derived neurotrophic factor (GDNF) on oocyte developmental competence were investigated. Porcine cumulus-oocyte cell complexes (COCs) were matured in serum-free medium supplemented with EGF (0, 10 or 50 ng/ml) and/or GDNF (0, 10 or 50 ng/ml) for 44 h, and subsequently subjected to fertilization and cultured for 7 days in vitro. The in vitro-formed blastocysts derived from selected growth factor groups (i.e. EGF = 50 ng/ml; GDNF = 50 ng/ml; EGF = 50 ng/ml + GDNF = 50 ng/ml) were also used for mRNA expression analysis, or were subjected to Hoechst staining. The results showed that the addition of EGF and/or GDNF during oocyte maturation dose dependently enhanced oocyte developmental competence. Compared with the embryos obtained from control or single growth factor-treated oocytes, treatment with the combination of EGF and GDNF was shown to significantly improve oocyte competence in terms of blastocyst formation, blastocyst cell number and blastocyst hatching rate (P < 0.05), and also simultaneously induced the expression of BCL-xL and TERT and suppressed the expression of caspase-3 in resulting blastocysts (P < 0.05). These results suggest that both GDNF and EGF may play an important role in the regulation of porcine in vitro oocyte maturation and the combination of these growth factors could promote oocyte competency and blastocyst quality.
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39
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Anchordoquy JM, Anchordoquy JP, Testa JA, Sirini MÁ, Furnus CC. Influence of vascular endothelial growth factor and Cysteamine on in vitro bovine oocyte maturation and subsequent embryo development. Cell Biol Int 2015; 39:1090-8. [PMID: 25879691 DOI: 10.1002/cbin.10481] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Revised: 04/07/2015] [Accepted: 04/08/2015] [Indexed: 01/01/2023]
Abstract
The objective of this study was to investigate the effect of VEGF and Cysteamine during in vitro maturation (IVM) of bovine oocytes on GSH content and developmental competence. For this purpose, experiments were designed to evaluate the effect of 0, 100, 300, and 500 ng/mL VEGF in IVM medium on: GSH content in oocytes and cumulus cells (Exp. 1) and subsequent embryo development (Exp. 2). Also, influence of adding 500 ng/mL VEGF and 100 μM Cysteamine to IVM medium on GSH content in oocytes and cumulus cells (Exp. 3) and oocyte developmental capacity (Exp. 4) were evaluated. Oocytes were matured in: a) Control; b) VEGF 0-3 h; c) Cysteamine 4-24 h; d) VEGF 0-3 h + Cysteamine 4-24 h; and e) VEGF + Cysteamine 24 h. The results showed that: i) VEGF did not alter GSH content in oocytes and cumulus cells; (ii) supplementation of 300 and 500 ng/mL VEGF increased blastocyst yield; (iii) the presence of VEGF + Cysteamine simultaneously during 24 h improved GSH content but not embryo development; and (iv) the presence of VEGF during the first 3 h + Cysteamine from 4 to 24 h increased GSH concentrations and subsequent embryo development. In conclusion, the addition of VEGF and Cysteamine in two sequential steps to maturation medium result in an improvement of cytoplasmic maturation, with a positive impact on oocyte developmental capacity by increasing the efficiency of in vitro blastocyst production. However, the effect was detrimental when both VEGF and Cysteamine were present during 24 of IVM.
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Affiliation(s)
- Juan Mateo Anchordoquy
- Instituto de Genética Veterinaria Prof. Fernando N. Dulout (IGEVET), Facultad de Ciencias Veterinarias, Universidad Nacional de La Plata - CONICET, calle 60 y 118 s/n, CP (1900), La Plata, Buenos Aires, Argentina
| | - Juan Patricio Anchordoquy
- Instituto de Genética Veterinaria Prof. Fernando N. Dulout (IGEVET), Facultad de Ciencias Veterinarias, Universidad Nacional de La Plata - CONICET, calle 60 y 118 s/n, CP (1900), La Plata, Buenos Aires, Argentina.,Cátedra de Fisiología, Laboratorio de Nutrición Mineral, Facultad de Ciencias Veterinarias, Universidad Nacional de La Plata, calle 60 y 118 s/n, CP (1900), La Plata, Buenos Aires, Argentina
| | - Juan Alberto Testa
- Instituto de Genética Veterinaria Prof. Fernando N. Dulout (IGEVET), Facultad de Ciencias Veterinarias, Universidad Nacional de La Plata - CONICET, calle 60 y 118 s/n, CP (1900), La Plata, Buenos Aires, Argentina.,Cátedra de Fisiología, Laboratorio de Nutrición Mineral, Facultad de Ciencias Veterinarias, Universidad Nacional de La Plata, calle 60 y 118 s/n, CP (1900), La Plata, Buenos Aires, Argentina
| | - Matías Ángel Sirini
- Instituto de Genética Veterinaria Prof. Fernando N. Dulout (IGEVET), Facultad de Ciencias Veterinarias, Universidad Nacional de La Plata - CONICET, calle 60 y 118 s/n, CP (1900), La Plata, Buenos Aires, Argentina
| | - Cecilia C Furnus
- Instituto de Genética Veterinaria Prof. Fernando N. Dulout (IGEVET), Facultad de Ciencias Veterinarias, Universidad Nacional de La Plata - CONICET, calle 60 y 118 s/n, CP (1900), La Plata, Buenos Aires, Argentina.,Cátedra de Citología, Histología y Embriología "A", Facultad de Ciencias Médicas, Universidad Nacional de La Plata, calle 60 y 118 s/n, CP (1900), La Plata, Buenos Aires, Argentina
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40
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De Cesaro MP, Macedo MP, Santos JT, Rosa PRA, Ludke CA, Rissi VB, Gasperin BG, Gonçalves PBD. Natriuretic peptides stimulate oocyte meiotic resumption in bovine. Anim Reprod Sci 2015; 159:52-9. [PMID: 26051611 DOI: 10.1016/j.anireprosci.2015.05.012] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2014] [Revised: 05/05/2015] [Accepted: 05/13/2015] [Indexed: 01/15/2023]
Abstract
The aim of the present study was to evaluate the expression of mRNA encoding natriuretic peptides (NPs) and their receptors in the cumulus-oocyte complex in cattle, a monovular mammalian species, and also to investigate the role of NPs in oocyte meiotic resumption in vitro. mRNA was observed for the NP precursor type-A (NPPA), type-C (NPPC), NP receptor-1 (NPR-1), receptor-2 (NPR-2) and receptor-3 (NPR-3) in bovine cumulus cells, and NPR-2 mRNA was observed in oocytes. These results are different from those obtained in mouse and pig models. The effects of NPPA, NP precursor type-B (NPPB) and NPPC on the resumption of arrested meiosis maintained by forskolin were studied at three different doses (10, 100 and 1000nM) with a 12h culture system. The germinal vesicle breakdown rates were greater (P≤0.05) in oocytes that were cultured in the presence of one or a combination of NPs (from 44% to 73%) than the negative control (from 24% to 27%). Additionally, it was demonstrated that the concentration of cyclic guanosine 3',5'-monophosphate (cGMP) is increased by NPPA and NPPC in oocytes and cumulus cells after 3h of in vitro maturation. However, in both groups, the concentration of cyclic adenosine 3',5'-monophosphate (cAMP) in the oocyte did not increase between 3 and 6h of culture, even when forskolin was used. In summary, we observed the presence of mRNA for NPs and their receptors in the bovine cumulus-oocyte complex and demonstrated that, in vitro, NPPA, NPPB and NPPC stimulate oocyte meiotic resumption in a monovular species.
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Affiliation(s)
- Matheus P De Cesaro
- Laboratory of Biotechnology and Animal Reproduction-BioRep, Federal University of Santa Maria, Santa Maria, RS, Brazil.
| | - Mariana P Macedo
- Laboratory of Biotechnology and Animal Reproduction-BioRep, Federal University of Santa Maria, Santa Maria, RS, Brazil
| | - Joabel T Santos
- Laboratory of Biotechnology and Animal Reproduction-BioRep, Federal University of Santa Maria, Santa Maria, RS, Brazil
| | - Paulo R A Rosa
- Laboratory of Biotechnology and Animal Reproduction-BioRep, Federal University of Santa Maria, Santa Maria, RS, Brazil
| | - Charles A Ludke
- Laboratory of Biotechnology and Animal Reproduction-BioRep, Federal University of Santa Maria, Santa Maria, RS, Brazil
| | - Vitor B Rissi
- Laboratory of Biotechnology and Animal Reproduction-BioRep, Federal University of Santa Maria, Santa Maria, RS, Brazil
| | - Bernardo G Gasperin
- Laboratory of Animal Reproduction-ReproPEL, Federal University of Pelotas, Capão do Leão, RS, Brazil
| | - Paulo B D Gonçalves
- Laboratory of Biotechnology and Animal Reproduction-BioRep, Federal University of Santa Maria, Santa Maria, RS, Brazil
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Epidermal growth factor-mediated mitogen-activated protein kinase3/1 pathway is conducive to in vitro maturation of sheep oocytes. PLoS One 2015; 10:e0120418. [PMID: 25799554 PMCID: PMC4370456 DOI: 10.1371/journal.pone.0120418] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Accepted: 01/21/2015] [Indexed: 01/01/2023] Open
Abstract
Epidermal growth factor (EGF) has been shown to facilitate the in vitro maturation of sheep oocytes, and enhance embryo’s capability for further development. However, such kind of molecular mechanism has not yet been elucidated. In the present study, we investigated the effect of EGF-mediated mitogen-activated protein kinases 3 and 1 (MAPK3/1) pathway on in vitro maturation of sheep oocytes. U0126, a specific inhibitor of MEK (MAPK kinase), was added into the maturation culture medium to block the EGF-mediated MAPK3/1 pathway with different doses. Then, the nuclear maturation of sheep oocytes was examined. Additionally, the effect of EGF-mediated MAPK3/1 on cytoplasmic maturation was examined though in vitro fertilization and embryonic development. The rate of germinal vesicle breakdown (GVBD) after 6 h of culture with 10−4 mol/l of U0126 (50.4%) was significantly decreased compared with control (67.2%, p < 0.05), and the first polation body (PB1) extrusion rate after 22 h of culture in drug treatment was also significantly inhibited compared with control (28.6% vs. 48.4%, p < 0.05). However, 10−6 mol/l U0126 had slight effect on oocyte nuclear maturation. The normal distribution rate of α-tubulin in the oocytes after 22 h of in vitro maturation was significantly decreased in the 10−4 mol/l U0126 group (54%) compared with control (68%, p < 0.05). After in vitro fertilization, the cleavage rate in drug treatments (56.8% in 10−6 mol/l U0126 group and 42.6% in 10−4 mol/l U0126 group) was significantly decreased compared with control (72.3%, p < 0.01). The blastocyst rate in 10−4 mol/l U0126 group (17.6%) was also significantly decreased compared with control (29.9%, p < 0.05). Collectively, these results suggest that EGF-mediated MAPK3/1 pathway is conducive to in vitro maturation of sheep oocytes.
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42
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Intercellular signaling via cyclic GMP diffusion through gap junctions restarts meiosis in mouse ovarian follicles. Proc Natl Acad Sci U S A 2015; 112:5527-32. [PMID: 25775542 DOI: 10.1073/pnas.1423598112] [Citation(s) in RCA: 109] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Meiosis in mammalian oocytes is paused until luteinizing hormone (LH) activates receptors in the mural granulosa cells of the ovarian follicle. Prior work has established the central role of cyclic GMP (cGMP) from the granulosa cells in maintaining meiotic arrest, but it is not clear how binding of LH to receptors that are located up to 10 cell layers away from the oocyte lowers oocyte cGMP and restarts meiosis. Here, by visualizing intercellular trafficking of cGMP in real-time in live follicles from mice expressing a FRET sensor, we show that diffusion of cGMP through gap junctions is responsible not only for maintaining meiotic arrest, but also for rapid transmission of the signal that reinitiates meiosis from the follicle surface to the oocyte. Before LH exposure, the cGMP concentration throughout the follicle is at a uniformly high level of ∼2-4 μM. Then, within 1 min of LH application, cGMP begins to decrease in the peripheral granulosa cells. As a consequence, cGMP from the oocyte diffuses into the sink provided by the large granulosa cell volume, such that by 20 min the cGMP concentration in the follicle is uniformly low, ∼100 nM. The decrease in cGMP in the oocyte relieves the inhibition of the meiotic cell cycle. This direct demonstration that a physiological signal initiated by a stimulus in one region of an intact tissue can travel across many layers of cells via cyclic nucleotide diffusion through gap junctions could provide a general mechanism for diverse cellular processes.
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43
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Zhang W, Chen Q, Yang Y, Liu W, Zhang M, Xia G, Wang C. Epidermal growth factor-network signaling mediates luteinizing hormone regulation of BNP and CNP and their receptor NPR2 during porcine oocyte meiotic resumption. Mol Reprod Dev 2014; 81:1030-41. [PMID: 25348585 DOI: 10.1002/mrd.22424] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2014] [Accepted: 09/07/2014] [Indexed: 11/06/2022]
Abstract
The epidermal growth factor (EGF) network, induced by luteinizing hormone (LH), plays an essential role during the regulation of oocyte maturation, cumulus expansion, and ovulation. Binding of brain natriuretic peptide (BNP) and C-type natriuretic peptide (CNP) to natriuretic receptor 2 (NPR2) generates cyclic guanosine monophosphate (cGMP), a key inhibitor that sustains porcine oocyte meiotic arrest. This correlation suggests that LH interacts with natriuretic-peptide signaling, possibly via the EGF network, to promote porcine meiotic resumption. In testing this hypothesis, we found that the majority of porcine oocytes remain arrested in the germinal-vesicle stage after 44 hr of co-culturing cumulus-oocyte complexes with 10(7) granulosa cells, which secreted active BNP and CNP; these natriuretic peptides associate with NPR2 on cumulus cells, thereby inhibiting porcine oocyte maturation. This inhibitory effect of BNP and CNP was relieved by EGF-like growth factors, whose expression naturally increases in granulosa cells 18 hr after human chorionic gonadotropin injection. LH and the EGF-like peptide amphiregulin (AREG) decreased BNP and CNP production in granulosa cells and down-regulated NPR2 expression in cumulus cells, which together decreased oocyte cGMP to levels that permit meiotic resumption. The effects of AREG on the gene expression of natriuretic-peptide signaling components and on oocyte maturation were completely blocked by the EGF receptor kinase inhibitor AG1478; the effect of LH, however, was only partially reversed by AG1478. Based on these results, LH regulates natriuretic-peptide signaling, although other pathways also cooperate with the EGF network to induce porcine oocyte maturation.
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Affiliation(s)
- Wenqiang Zhang
- State Key Laboratory of Agro-Biotechnology, College of Biological Sciences, China Agricultural University, Beijing, 100193, People's Republic of China
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Franciosi F, Coticchio G, Lodde V, Tessaro I, Modina SC, Fadini R, Dal Canto M, Renzini MM, Albertini DF, Luciano AM. Natriuretic Peptide Precursor C Delays Meiotic Resumption and Sustains Gap Junction-Mediated Communication in Bovine Cumulus-Enclosed Oocytes1. Biol Reprod 2014; 91:61. [DOI: 10.1095/biolreprod.114.118869] [Citation(s) in RCA: 81] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
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Carrying-over effects of GVBD blocking on post-blocking meiotic progression of oocytes: species difference and the signaling pathway leading to MPF activation. PLoS One 2014; 9:e103838. [PMID: 25078078 PMCID: PMC4117542 DOI: 10.1371/journal.pone.0103838] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2014] [Accepted: 07/07/2014] [Indexed: 11/19/2022] Open
Abstract
Efforts to improve the quality of in vitro matured oocytes by blocking germinal vesicle breakdown (GVBD) and allowing more time for ooplasmic maturation have achieved little due to a lack of knowledge on the molecular events during GVBD blocking. Such knowledge is also important for studies aimed at regulating gene expression in maturing oocytes prior to GVBD. We studied species difference and signaling pathways leading to the carrying-over effect of GVBD blocking on post-blocking meiotic progression (PBMP). Overall, GVBD-blocking with roscovitine decelerated PBMP of mouse oocytes but accelerated that of pig oocytes. During blocking culture, whereas cyclin B of pig oocytes increased continuously, that of mouse oocytes declined first and then increased slowly. In both species, (a) whereas active CDC2A showed a dynamics similar to cyclin B, inactive CDC2A decreased continuously; (b) when oocytes were blocked in blocking medium containing cycloheximide, PBMP was decelerated significantly while cyclin B and active CDC2A decreasing to the lowest level; (c) whereas sodium vanadate in blocking medium reduced PBMP, epidermal growth factor (EGF) in blocking medium accelerated PBMP significantly with no effect on cyclin B levels. In conclusion, the EGF signaling cascade accelerated PBMP by promoting the pre-MPF (M-phase-promoting factor) to MPF conversion during GVBD blocking with roscovitine. The significant difference in PBMP observed between mouse and pig oocytes was caused by species difference in cyclin B dynamics during blocking culture as no species difference was observed in either pre-MPF to MPF conversion or the EGF signaling activity.
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Zhang Y, Hao X, Xiang X, Wei K, Xia G, Zhang M. Porcine natriuretic peptide type B (pNPPB) maintains mouse oocyte meiotic arrest via natriuretic peptide receptor 2 (NPR2) in cumulus cells. Mol Reprod Dev 2014; 81:462-9. [PMID: 24615855 DOI: 10.1002/mrd.22311] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2013] [Accepted: 02/05/2014] [Indexed: 11/09/2022]
Abstract
In mouse ovarian follicles, the oocyte is maintained in meiotic prophase arrest by natriuretic peptide type C (NPPC) acting via its cognate receptor, natriuretic peptide receptor 2 (NPR2). As there is a marked species difference in the receptor selectivity of the natriuretic peptide family, this study examined the functional effect of other natriuretic peptides, type A (NPPA) and type B (NPPB), acting via NPR2 on mouse-oocyte meiotic arrest. The results by quantitative, reverse-transcriptase PCR showed that Npr2 was the predominant natriuretic peptide receptor transcript, and that Npr1 and Npr3 mRNA levels were negligible in cumulus cells isolated from equine chorionic gonadotropin (eCG)-primed, immature female mice. While NPPA and NPPB from human and rat had no effect on oocyte maturation, porcine NPPB (pNPPB) maintained oocyte meiotic arrest in a dose-dependent manner. Furthermore, pNPPB-mediated meiotic arrest and cGMP production could be completely blocked by the NPR2 inhibitor sphingosine-1-phosphate (S1P). Neither the NPR1 antagonist anantin or Npr1 knockout had an effect on pNPPB-mediated meiotic arrest. Thus, pNPPB can functionally maintain mouse-oocyte meiotic arrest by the receptor NPR2 of cumulus cells. These findings demonstrate that pNPPB may be used as a probe to identify the essential amino acid sequences for activation of NPR2.
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Affiliation(s)
- Yu Zhang
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, People's Republic of China
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Liu X, Xie F, Zamah AM, Cao B, Conti M. Multiple pathways mediate luteinizing hormone regulation of cGMP signaling in the mouse ovarian follicle. Biol Reprod 2014; 91:9. [PMID: 24740605 DOI: 10.1095/biolreprod.113.116814] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
Luteinizing hormone (LH) regulation of the epidermal growth factor (EGF) network is critical for oocyte maturation and the ovulatory process. Recent studies have indicated that C-type natriuretic peptide (CNP) and its receptor natriuretic peptide receptor B (NPR2) play an important role in the control of meiotic arrest. Here, we investigated the involvement of the EGF network in the LH-dependent regulation of the CNP/NPR2 axis and cGMP accumulation. LH/hCG treatment causes a major decrease in both cGMP and the CNP precursor (natriuretic peptide precursor C [Nppc]) mRNA accumulation in vivo and in vitro. However, the cGMP downregulation precedes the decrease in Nppc mRNA by more than 1 h. Amphiregulin, an EGF-like factor, suppresses Nppc mRNA levels in cultured follicles to the same extent as LH, and this effect is completely prevented by the EGF receptor (EGFR) kinase inhibitor AG1478. However, the LH-dependent suppression of Nppc is insensitive to AG1478. Similarly, Nppc suppression by LH occurs in follicles from EGFR null mice. These findings document that EGFR signaling is sufficient to downregulate CNP, but is not necessary for LH action. When cGMP concentration in the follicle is measured, the short-term, but not long-term, LH effects on cGMP are prevented by AG1478, suggesting that ligand availability may be responsible for the late response. Human CG decreases the CNP-dependent cGMP synthesis in wild-type and EGFR knockdown cumulus-oocyte complexes. These findings demonstrate that redundant pathways are involved in the regulation of cGMP. EGFR-dependent events are involved in the short-term regulation of cGMP, whereas the long-term effects may involve regulation of the CNP.
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Affiliation(s)
- Xueqing Liu
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, People's Republic of China Department of Obstetrics, Gynecology and Reproductive Sciences, Center for Reproductive Sciences, The Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California San Francisco (UCSF) Medical Center, UCSF, San Francisco, California
| | - Fang Xie
- Department of Obstetrics, Gynecology and Reproductive Sciences, Center for Reproductive Sciences, The Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California San Francisco (UCSF) Medical Center, UCSF, San Francisco, California
| | - Alberuni Musa Zamah
- Department of Obstetrics, Gynecology and Reproductive Sciences, Center for Reproductive Sciences, The Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California San Francisco (UCSF) Medical Center, UCSF, San Francisco, California
| | - Binyun Cao
- College of Animal Science and Technology, Northwest A&F, Yangling, Shaanxi, People's Republic of China
| | - Marco Conti
- Department of Obstetrics, Gynecology and Reproductive Sciences, Center for Reproductive Sciences, The Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California San Francisco (UCSF) Medical Center, UCSF, San Francisco, California
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Kawashima I, Umehara T, Noma N, Kawai T, Shitanaka M, Richards JS, Shimada M. Targeted disruption of Nrg1 in granulosa cells alters the temporal progression of oocyte maturation. Mol Endocrinol 2014; 28:706-21. [PMID: 24650175 DOI: 10.1210/me.2013-1316] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Neuregulin 1 (NRG1) is induced in granulosa cells by LH and acts on granulosa and cumulus cells during ovulation. In this study, we sought to determine the role of NRG1 in oocyte maturation by generating a granulosa cell-specific Nrg1 knockout mouse (Nrg1(flox/flox);Cyp19a1Cre mice [gcNrg1KO]). In the gcNrg1KO mice, meiosis was induced 2 hours earlier than in control mice. More than 60% of the oocytes in the mutant mice spontaneously re-resumed meiosis beyond the MII stage. The percentage of successful fertilization was comparable in oocytes of both genotypes collected at 14 or 16 hours after human chorionic gonadotropin injection but was significantly lower in oocytes of the gcNrg1KO mice at 18 or 20 hours. The number of pups per litter was significantly decreased in gcNrg1KO mice. To determine the molecular events associated with the abnormal progression of meiosis in the gcNrg1KO mouse oocytes, the defects of cumulus/granulosa cell functions were analyzed. The expression of genes involved in luteinization and cumulus expansion was significantly higher at 2 hours after human chorionic gonadotropin injection in the gcNrg1KO mice; this was related to abnormal activation of protein kinase C (PKC) and phosphorylation of connexin-43 in cumulus cells. Changes in connexin-43 by PKC might lead to early meiotic resumption of oocytes in gcNrg1KO mice. We conclude that NRG1 is induced by LH in mural granulosa cells and exerts an important regulatory role in oocyte meiotic maturation and competence by reducing PKC activation in cumulus cells and preventing premature progression to the MII stage that leads to abnormal fertilization and fertility.
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Affiliation(s)
- Ikko Kawashima
- Laboratory of Reproductive Endocrinology (I.K., T.U., N.N., T.K., M.S., M.S.), Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima,739-8528, Japan; and Department of Molecular and Cellular Biology (J.S.R.), Baylor College of Medicine, Houston, Texas 77030
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Gadella BM, Luna C. Cell biology and functional dynamics of the mammalian sperm surface. Theriogenology 2014; 81:74-84. [DOI: 10.1016/j.theriogenology.2013.09.005] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2013] [Revised: 09/07/2013] [Accepted: 09/08/2013] [Indexed: 12/11/2022]
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