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Wang R, Cheng F, Yang X. FTO attenuates the cytotoxicity of cisplatin in KGN granulosa cell-like tumour cells by regulating the Hippo/YAP1 signalling pathway. J Ovarian Res 2024; 17:62. [PMID: 38491479 PMCID: PMC10941382 DOI: 10.1186/s13048-024-01385-5] [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: 09/16/2023] [Accepted: 03/01/2024] [Indexed: 03/18/2024] Open
Abstract
Premature ovarian failure (POF) is a devastating condition for women under 40 years old. Chemotherapy, especially the use of cisplatin, has been demonstrated to promote the apoptosis of granulosa cells in primary and secondary follicles, leading to POF. Our previous studies demonstrated that fat mass- and obesity-associated (FTO) plays an essential role in protecting granulosa cells from cisplatin-induced cytotoxicity. Various studies have suggested that the Hippo/YAP signalling pathway plays a significant role in regulating cell apoptosis and proliferation. Additionally, YAP1 is the main downstream target of the Hippo signalling pathway and is negatively regulated by the Hippo signalling pathway. However, whether the Hippo/YAP signalling pathway is involved in the protective effect of FTO on granulosa cells has not been determined. In this study, we found that after cisplatin treatment, the apoptosis of granulosa cells increased in a concentration-dependent manner, accompanied by the downregulation of FTO and YAP1. Furthermore, overexpression of FTO decreased cisplatin-induced granulosa cell apoptosis, inhibited the Hippo/YAP kinase cascade-induced phosphorylation of YAP1, and promoted the entry of YAP1 into the nucleus. The downstream targets of YAP1 (CTGF, CYR61, and ANKRD1) were also increased. Si-RNA-mediated downregulation of FTO promoted cisplatin-induced granulosa cell apoptosis, activated the Hippo/YAP kinase cascade, and inhibited the YAP1 entry into the nucleus. These effects were completely reversed by the small molecule inhibitor of YAP1-verteporfin (VP). Taken together, these data suggested that FTO-YAP1 plays a positive role in regulating the proliferation of injured granulosa cells induced by cisplatin.
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Affiliation(s)
- Rongli Wang
- Department of Obstetrics and Gynecology, Peking University People's Hospital, No. 11, Xi-Zhi-Men South Street, Xi Cheng District, Beijing, 100044, China.
- Department of Obstetrics and Gynecology, First Affiliated Hospital, Xi'an Jiaotong University, Xi'an, 710061, China.
| | - Feiyan Cheng
- Department of Obstetrics and Gynecology, First Affiliated Hospital, Xi'an Jiaotong University, Xi'an, 710061, China
| | - Xinyuan Yang
- Department of Obstetrics and Gynecology, First Affiliated Hospital, Xi'an Jiaotong University, Xi'an, 710061, China.
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2
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Huang Z, Xu T, Liu C, Wu H, Weng L, Cai J, Liang N, Ge H. Correlation between ovarian follicular development and Hippo pathway in polycystic ovary syndrome. J Ovarian Res 2024; 17:14. [PMID: 38216976 PMCID: PMC10785326 DOI: 10.1186/s13048-023-01305-z] [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: 07/12/2023] [Accepted: 11/02/2023] [Indexed: 01/14/2024] Open
Abstract
BACKGROUND For women of childbearing age, the biggest problem caused by polycystic ovary syndrome (PCOS) is infertility, which is mainly caused by anovulation, abnormal follicular development, proliferation of small antral follicles, and cystic follicles. The mechanism underlying its occurrence is not clear. The abnormal proliferation and development of follicles in PCOS patients is a complex process, which is affected by many factors. The objective of this study was to investigate the relationship between the Hippo pathway and follicular development in PCOS, and to further explore this relationship by using the YAP inhibitor verteporfin (VP). METHOD 30 3-week-old BALB/C female rats were randomly divided into control group (n = 10), DHEA group (n = 10) and DHEA + VP group (n = 10). The morphology of ovary and the degree of follicular development were observed by HE staining, and the expression and location of AMH in ovarian follicles were observed by immunofluorescence. The ovarian reserve function index AMH, cell proliferation index PCNA and the ratio of Hippo pathway related proteins MST, LATS, YAP, P-YAP and P-YAP/YAP were detected by Western blot. RESULTS After dividing 30 3-week-old female mice into control, dehydroepiandrosterone (DHEA; model of PCOS), and DHEA + VP groups, we found that the number of small follicles increased in the DHEA group compared to the control group. Additionally, in the DHEA group compared to the control group, anti-müllerian hormone (AMH; ovarian reserve index) increased, proliferating cell nuclear antigen (PCNA; cell proliferation index) decreased, and upstream (MST and LATS) and downstream (YAP and p-YAP) proteins in the Hippo pathway increased, though the p-YAP/YAP ratio decreased. VP ameliorated the increases in AMH, MST, LATS, YAP and p-YAP, but did not ameliorate the decrease in the p-YAP/YAP ratio. CONCLUSIONS This study indicates that the increased small follicles in the ovaries and changes in ovarian reserve and cell proliferation may be closely related to Hippo pathway activation. This suggests that the Hippo pathway may be an important pathway affecting the proliferation and development of follicles and the occurrence of PCOS.
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Affiliation(s)
- Zichao Huang
- Graduate School, Nanjing University of Chinese Medicine, Nanjing, China
- Reproduction Medicine Centre, The Affiliated Taizhou People's Hospital of Nanjing Medical University, Taizhou, China
| | - Tianyue Xu
- Graduate School, Nanjing University of Chinese Medicine, Nanjing, China
- Reproduction Medicine Centre, The Affiliated Taizhou People's Hospital of Nanjing Medical University, Taizhou, China
| | - Chunling Liu
- Center for Reproductive Medicine, the Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu, 215004, China
| | - Honghui Wu
- Graduate School, Nanjing University of Chinese Medicine, Nanjing, China
- Graduate School, Dalian Medical University, Liaoning, China
| | - Linglin Weng
- Graduate School, Nanjing University of Chinese Medicine, Nanjing, China
- Reproduction Medicine Centre, The Affiliated Taizhou People's Hospital of Nanjing Medical University, Taizhou, China
| | - Jieyu Cai
- Graduate School, Nanjing University of Chinese Medicine, Nanjing, China
- Reproduction Medicine Centre, The Affiliated Taizhou People's Hospital of Nanjing Medical University, Taizhou, China
| | - Na Liang
- Graduate School, Nanjing University of Chinese Medicine, Nanjing, China
- Graduate School, Dalian Medical University, Liaoning, China
| | - Hongshan Ge
- Graduate School, Nanjing University of Chinese Medicine, Nanjing, China.
- Reproduction Medicine Centre, The Affiliated Taizhou People's Hospital of Nanjing Medical University, Taizhou, China.
- Graduate School, Dalian Medical University, Liaoning, China.
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Xia L, Shen Y, Liu S, Du J. Iron overload triggering ECM-mediated Hippo/YAP pathway in follicle development: a hypothetical model endowed with therapeutic implications. Front Endocrinol (Lausanne) 2023; 14:1174817. [PMID: 37223010 PMCID: PMC10200985 DOI: 10.3389/fendo.2023.1174817] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Accepted: 04/12/2023] [Indexed: 05/25/2023] Open
Abstract
Disruption of iron homeostasis plays a negative role in follicle development. The dynamic changes in follicle growth are dependent on Hippo/YAP signaling and mechanical forces. However, little is known about the liaison between iron overload and the Hippo/YAP signalling pathway in term of folliculogenesis. Here, based on the available evidence, we established a hypothesized model linking excessive iron, extracellular matrix (ECM), transforming growth factor-β (TGF-β) and Hippo/Yes-associated protein (YAP) signal regarding follicle development. Hypothetically, the TGF-β signal and iron overload may play a synergistic role in ECM production via YAP. We speculate that the dynamic homeostasis of follicular iron interacts with YAP, increasing the risk of ovarian reserve loss and may enhance the sensitivity of follicles to accumulated iron. Hence, therapeutic interventions targeting iron metabolism disorders, and Hippo/YAP signal may alter the consequences of the impaired developmental process based on our hypothesis, which provides potential targets and inspiration for further drug discovery and development applied to clinical treatment.
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Affiliation(s)
- Lingjin Xia
- National Health Commission of the People's Republic of China (NHC) Key Lab of Reproduction Regulation (Shanghai Institute for Biomedical and Pharmaceutical Technologies), School of Pharmacy, Fudan University, Shanghai, China
| | - Yupei Shen
- National Health Commission of the People's Republic of China (NHC) Key Lab of Reproduction Regulation (Shanghai Institute for Biomedical and Pharmaceutical Technologies), School of Pharmacy, Fudan University, Shanghai, China
| | - Suying Liu
- Reproductive Medicine Center, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Jing Du
- National Health Commission of the People's Republic of China (NHC) Key Lab of Reproduction Regulation (Shanghai Institute for Biomedical and Pharmaceutical Technologies), School of Pharmacy, Fudan University, Shanghai, China
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4
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Clark KL, George JW, Przygrodzka E, Plewes MR, Hua G, Wang C, Davis JS. Hippo Signaling in the Ovary: Emerging Roles in Development, Fertility, and Disease. Endocr Rev 2022; 43:1074-1096. [PMID: 35596657 PMCID: PMC9695108 DOI: 10.1210/endrev/bnac013] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Indexed: 01/09/2023]
Abstract
Emerging studies indicate that the Hippo pathway, a highly conserved pathway that regulates organ size control, plays an important role in governing ovarian physiology, fertility, and pathology. Specific to the ovary, the spatiotemporal expression of the major components of the Hippo signaling cascade are observed throughout the reproductive lifespan. Observations from multiple species begin to elucidate the functional diversity and molecular mechanisms of Hippo signaling in the ovary in addition to the identification of interactions with other signaling pathways and responses to various external stimuli. Hippo pathway components play important roles in follicle growth and activation, as well as steroidogenesis, by regulating several key biological processes through mechanisms of cell proliferation, migration, differentiation, and cell fate determination. Given the importance of these processes, dysregulation of the Hippo pathway contributes to loss of follicular homeostasis and reproductive disorders such as polycystic ovary syndrome (PCOS), premature ovarian insufficiency, and ovarian cancers. This review highlights what is currently known about the Hippo pathway core components in ovarian physiology, including ovarian development, follicle development, and oocyte maturation, while identifying areas for future research to better understand Hippo signaling as a multifunctional pathway in reproductive health and biology.
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Affiliation(s)
- Kendra L Clark
- Olson Center for Women's Health, Department of Obstetrics and Gynecology, University of Nebraska Medical Center, Omaha, NE 68198, USA.,Veterans Affairs Nebraska Western Iowa Health Care System, Omaha, NE 68105, USA
| | - Jitu W George
- Olson Center for Women's Health, Department of Obstetrics and Gynecology, University of Nebraska Medical Center, Omaha, NE 68198, USA.,Veterans Affairs Nebraska Western Iowa Health Care System, Omaha, NE 68105, USA
| | - Emilia Przygrodzka
- Olson Center for Women's Health, Department of Obstetrics and Gynecology, University of Nebraska Medical Center, Omaha, NE 68198, USA.,Veterans Affairs Nebraska Western Iowa Health Care System, Omaha, NE 68105, USA
| | - Michele R Plewes
- Olson Center for Women's Health, Department of Obstetrics and Gynecology, University of Nebraska Medical Center, Omaha, NE 68198, USA.,Veterans Affairs Nebraska Western Iowa Health Care System, Omaha, NE 68105, USA
| | - Guohua Hua
- Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, College of Animal Science & Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, China
| | - Cheng Wang
- Department of Obstetrics and Gynecology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - John S Davis
- Olson Center for Women's Health, Department of Obstetrics and Gynecology, University of Nebraska Medical Center, Omaha, NE 68198, USA.,Veterans Affairs Nebraska Western Iowa Health Care System, Omaha, NE 68105, USA
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Expression of Key Factors of the Hippo Signaling Pathway in Yak (Bos grunniens) Mammary Gland. Animals (Basel) 2022; 12:ani12162103. [PMID: 36009693 PMCID: PMC9404922 DOI: 10.3390/ani12162103] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 08/10/2022] [Accepted: 08/15/2022] [Indexed: 11/16/2022] Open
Abstract
Simple Summary The Hippo signaling pathway plays a significant role in regulating the organ development processes of mammals. Our research aimed to investigate the expression and distribution of key members of the Hippo signaling pathway in yak mammary glands during different stages. Using immunohistochemistry, Western blot, and relative quantitative real-time polymerase chain reaction techniques, we found that the protein and mRNA expression levels of MST1, LATS1, YAP1 and TEAD1 in the yak’s mammary gland varies with the growth, lactation, and dry periods. The differential expression in the yak’s mammary gland at different stages strongly suggests that the Hippo signaling pathway plays an important role in regulating the mammary gland development processes under different physiological conditions. Abstract Due to its rich nutritional value, yak milk is an important food source in the alpine pastoral areas. However, yaks have a low milk yield. The Hippo pathway participates in cell proliferation and organ development. We aimed to determine the regulatory mechanism of this pathway in yak mammary cells. A greater understanding of how the expression of its essential genes influence the reproductive cycle could lead to improvements in lactation performance. The expression levels of the key genes MST1, LATS1, YAP1, and TEAD1 were detected by quantitative real-time PCR, Western blotting, and immunohistochemistry during the growth, lactation, and dry periods (GP, LP and DP, respectively). The MST1 and LATS1 mRNA and protein expression level was highest during GP and lowest during LP. The YAP1 and TEAD1 mRNA and protein expression level decreased from GP to LP and DP. MST1 and LATS1 were expressed in the cytoplasm whereas YAP1 and TEAD1 were expressed in the nucleus and cytoplasm, respectively. The differential expression of MST1, LATS1, YAP1, and TEAD1 expression in the yak mammary gland during different developmental stages strongly suggests that they play an important role in the regulation of developmental functions under different physiological conditions.
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Lidaka L, Bekere L, Lazdane G, Lazovska M, Dzivite-Krisane I, Gailite L. Role of Single Nucleotide Variants in the YAP1 Gene in Adolescents with Polycystic Ovary Syndrome. Biomedicines 2022; 10:biomedicines10071688. [PMID: 35884992 PMCID: PMC9312887 DOI: 10.3390/biomedicines10071688] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 07/08/2022] [Accepted: 07/11/2022] [Indexed: 11/29/2022] Open
Abstract
Background: Polycystic ovary syndrome (PCOS) is one of the most common endocrinopathies in women. It can manifest in adolescence, affecting up to 8% of adolescents. Long-term health consequences characteristic of PCOS are impaired fertility, increased risk of type 2 diabetes, metabolic disorders and cardiovascular disease. All of these sequelae are exacerbated by increased body weight, a major feature of PCOS. The protein encoded by the YAP1 gene plays a key role in one of the pivotal mechanisms that govern cellular/organismal metabolism and contributes to the pathogenesis of metabolic diseases. Aim: To compare the prevalence of single nucleotide variants (SNVs) in the YAP1 gene among adolescents with PCOS, adolescents at risk of PCOS development and healthy adolescents, and assess their association with the clinical characteristics of PCOS. Results: The frequencies of the five investigated YAP1 gene SNVs (rs11225161, rs11225166, rs3858420, rs11225138 and rs79981660) were not significantly different among adolescents with PCOS, risk group patients and healthy controls. Furthermore, none of the SNVs contributed to the clinical characteristics of adolescents with PCOS and adolescents at risk of PCOS development. Conclusions: No significant associations were found between PCOS in adolescents and the five investigated SNVs in the YAP1 gene.
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Affiliation(s)
- Lasma Lidaka
- Department of Paediatric Gynaecology, Children’s Clinical University Hospital, LV-1004 Riga, Latvia
- Department of Obstetrics and Gynaecology, Riga Stradins University, LV-1007 Riga, Latvia;
- Correspondence:
| | - Laine Bekere
- Faculty of Residency, Riga Stradins University, LV-1007 Riga, Latvia;
| | - Gunta Lazdane
- Department of Obstetrics and Gynaecology, Riga Stradins University, LV-1007 Riga, Latvia;
| | - Marija Lazovska
- Scientific Laboratory of Molecular Genetics, Riga Stradins University, LV-1007 Riga, Latvia; (M.L.); (L.G.)
| | - Iveta Dzivite-Krisane
- Department of Paediatric Endocrinology, Children’s Clinical University Hospital, LV-1004 Riga, Latvia;
| | - Linda Gailite
- Scientific Laboratory of Molecular Genetics, Riga Stradins University, LV-1007 Riga, Latvia; (M.L.); (L.G.)
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Moon S, Hwang S, Kim B, Lee S, Kim H, Lee G, Hong K, Song H, Choi Y. Hippo Signaling in the Endometrium. Int J Mol Sci 2022; 23:ijms23073852. [PMID: 35409214 PMCID: PMC8998929 DOI: 10.3390/ijms23073852] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 03/22/2022] [Accepted: 03/22/2022] [Indexed: 01/27/2023] Open
Abstract
The uterus is essential for embryo implantation and fetal development. During the estrous cycle, the uterine endometrium undergoes dramatic remodeling to prepare for pregnancy. Angiogenesis is an essential biological process in endometrial remodeling. Steroid hormones regulate the series of events that occur during such remodeling. Researchers have investigated the potential factors, including angiofactors, involved in endometrial remodeling. The Hippo signaling pathway discovered in the 21st century, plays important roles in various cellular functions, including cell proliferation and cell death. However, its role in the endometrium remains unclear. In this review, we describe the female reproductive system and its association with the Hippo signaling pathway, as well as novel Hippo pathway genes and potential target genes.
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8
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Dri M, Klinger FG, De Felici M. The ovarian reserve as target of insulin/IGF and ROS in metabolic disorder-dependent ovarian dysfunctions. REPRODUCTION AND FERTILITY 2022; 2:R103-R112. [PMID: 35118400 PMCID: PMC8801032 DOI: 10.1530/raf-21-0038] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 08/17/2021] [Indexed: 11/20/2022] Open
Abstract
It is known for a long time that metabolic disorders can cause ovarian dysfunctions and affect a woman’s fertility either by direct targeting follicular cells and/or the oocytes or by indirect interference with the pituitary-hypothalamic axis, resulting in dysfunctional oogenesis. Such disorders may also influence the efficiency of the embryo implantation and the quality of the embryo with permanent effects on the fertility and health of the offspring. Thanks to the expanding knowledge on the molecular mechanisms governing oogenesis and folliculogenesis in mammals, we are beginning to understand how such disorders can negatively affect this process and consequently fertility in women. In the present review, we point out and discuss how the disturbance of insulin/IGF-dependent signalling and increased reactive oxygen species (ROS) level in the ovary typically associated to metabolic disorders such as type II diabetes and obesity can dysregulate the dynamics of the ovarian reserve and/or impair the survival and competence of the oocytes.
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Affiliation(s)
- Maria Dri
- Department of Biomedicine and Prevention, University of Rome Tor Vergata, Rome, Italy
| | | | - Massimo De Felici
- Department of Biomedicine and Prevention, University of Rome Tor Vergata, Rome, Italy
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9
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Qazi IH, Cao Y, Yang H, Angel C, Pan B, Zhou G, Han H. Impact of Dietary Selenium on Modulation of Expression of Several Non-Selenoprotein Genes Related to Key Ovarian Functions, Female Fertility, and Proteostasis: a Transcriptome-Based Analysis of the Aging Mice Ovaries. Biol Trace Elem Res 2021; 199:633-648. [PMID: 32430805 DOI: 10.1007/s12011-020-02192-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Accepted: 05/10/2020] [Indexed: 02/07/2023]
Abstract
Female reproductive (ovarian) aging is characterized by a marked decline in quantity and quality of follicles and oocytes, as well as alterations in the surrounding ovarian stroma. In our previous report, we have shown that dietary selenium (Se) insufficiency and supplementation differentially impacted the reproductive efficiency in aging mice; however, the precise understanding of such modulation is still incomplete. In the present study, we sought to determine the impact of low (mildly low level) and moderately high (medium level) Se diets on expression profile of non-selenoprotein genes in the ovaries of aging mice. For this purpose, the aged mice were divided in two groups and fed either a low Se (Se-L; 0.08 mg Se/kg) diet or a moderately high Se (Se-M; 0.33 mg Se/kg) diet. RNA-seq analysis revealed that a total of 168 genes were differentially expressed between the two groups. From these, 72 and 96 differentially expressed genes (DEGs) were found to be upregulated and downregulated, respectively. Gene Ontology (GO) and pathways enrichment (KEGG) analyses revealed that these DEGs were enriched in several key GO terms and biological pathways including PI3K-Akt signaling pathway, steroid hormone biosynthesis, signaling pathways regulating pluripotency of stem cells, Hippo signaling pathway, ovarian steroidogenesis, and Wnt signaling pathway. Further filtering of RNA-seq data revealed that several DEGs such as Star, Hsd3b6, Scd1, Bmp7, Aqp8, Gas1, Fzd1, and Wwc1 were implicated in key ovarian- and fertility-related functions. In addition, some of the DEGs were related to ER homeostasis and/or proteostasis. These results highlight that dietary low and moderately high (medium level) Se diets, in addition to modulation of selenoproteins, can also have an impact on expression of several non-selenoprotein genes in the ovaries of aging mice. To sum up, these findings add more value to our understanding of Se modulation of ovarian functions and female fertility and will pave a way for the focused mechanistic and functional studies in this domain.
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Affiliation(s)
- Izhar Hyder Qazi
- Beijing Key Laboratory for Animal Genetic Improvement, College of Animal Science and Technology, China Agricultural University, Beijing, 100193, China
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, 611130, China
- Department of Veterinary Anatomy & Histology, Shaheed Benazir Bhutto University of Veterinary and Animal Sciences, Sakrand, 67210, Sindh, Pakistan
| | - Yutao Cao
- Beijing Key Laboratory for Animal Genetic Improvement, College of Animal Science and Technology, China Agricultural University, Beijing, 100193, China
| | - Haoxuan Yang
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, 611130, China
| | - Christiana Angel
- Department of Veterinary Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
- Department of Veterinary Parasitology, Faculty of Veterinary Sciences, Shaheed Benazir Bhutto University of Veterinary and Animal Sciences, Sakrand, 67210, Sindh, Pakistan
| | - Bo Pan
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, 611130, China
| | - Guangbin Zhou
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, 611130, China.
| | - Hongbing Han
- Beijing Key Laboratory for Animal Genetic Improvement, College of Animal Science and Technology, China Agricultural University, Beijing, 100193, China.
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Papageorgiou K, Mastora E, Zikopoulos A, Grigoriou ME, Georgiou I, Michaelidis TM. Interplay Between mTOR and Hippo Signaling in the Ovary: Clinical Choice Guidance Between Different Gonadotropin Preparations for Better IVF. Front Endocrinol (Lausanne) 2021; 12:702446. [PMID: 34367070 PMCID: PMC8334720 DOI: 10.3389/fendo.2021.702446] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Accepted: 07/05/2021] [Indexed: 01/18/2023] Open
Abstract
One of the most widely used types of assisted reproduction technology is the in vitro fertilization (IVF), in which women undergo controlled ovarian stimulation through the administration of the appropriate hormones to produce as many mature follicles, as possible. The most common hormone combination is the co-administration of gonadotropin-releasing hormone (GnRH) analogues with recombinant or urinary-derived follicle-stimulating hormone (FSH). In the last few years, scientists have begun to explore the effect that different gonadotropin preparations have on granulosa cells' maturation and apoptosis, aiming to identify new predictive markers of oocyte quality and successful fertilization. Two major pathways that control the ovarian development, as well as the oocyte-granulosa cell communication and the follicular growth, are the PI3K/Akt/mTOR and the Hippo signaling. The purpose of this article is to briefly review the current knowledge about the effects that the different gonadotropins, used for ovulation induction, may exert in the biology of granulosa cells, focusing on the importance of these two pathways, which are crucial for follicular maturation. We believe that a better understanding of the influence that the various ovarian stimulation protocols have on these critical molecular cascades will be invaluable in choosing the best approach for a given patient, thereby avoiding cancelled cycles, reducing frustration and potential treatment-related complications, and increasing the pregnancy rate. Moreover, individualizing the treatment plan will help clinicians to better coordinate assisted reproductive technology (ART) programs, discuss the specific options with the couples undergoing IVF, and alleviate stress, thus making the IVF experience easier.
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Affiliation(s)
- Kyriaki Papageorgiou
- Department of Biological Applications & Technologies, School of Health Sciences, University of Ioannina, Ioannina, Greece
- Institute of Molecular Biology and Biotechnology, Division of Biomedical Research, Foundation for Research and Technology – Hellas, Ioannina, Greece
| | - Eirini Mastora
- Laboratory of Medical Genetics of Human Reproduction, Medical School, University of Ioannina, Ioannina, Greece
- Medical Genetics and Assisted Reproduction Unit, Department of Obstetrics and Gynecology, Ioannina University Hospital, Ioannina, Greece
| | - Athanasios Zikopoulos
- Laboratory of Medical Genetics of Human Reproduction, Medical School, University of Ioannina, Ioannina, Greece
- Medical Genetics and Assisted Reproduction Unit, Department of Obstetrics and Gynecology, Ioannina University Hospital, Ioannina, Greece
| | - Maria E. Grigoriou
- Department of Molecular Biology & Genetics, Democritus University of Thrace, Alexandroupolis, Greece
| | - Ioannis Georgiou
- Laboratory of Medical Genetics of Human Reproduction, Medical School, University of Ioannina, Ioannina, Greece
- Medical Genetics and Assisted Reproduction Unit, Department of Obstetrics and Gynecology, Ioannina University Hospital, Ioannina, Greece
| | - Theologos M. Michaelidis
- Department of Biological Applications & Technologies, School of Health Sciences, University of Ioannina, Ioannina, Greece
- Institute of Molecular Biology and Biotechnology, Division of Biomedical Research, Foundation for Research and Technology – Hellas, Ioannina, Greece
- *Correspondence: Theologos M. Michaelidis, ;
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11
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Retinoic acid and fibroblast growth factor-2 play a key role on modulation of sex hormones and apoptosis in a mouse model of polycystic ovary syndrome induced by estradiol valerate. Taiwan J Obstet Gynecol 2020; 59:882-890. [PMID: 33218406 DOI: 10.1016/j.tjog.2020.08.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/01/2020] [Indexed: 11/22/2022] Open
Abstract
OBJECTIVE The main goal of the present study is to investigate the effects of retinoic acid and fibroblast growth factor-2 on serum levels of FSH and LH, histology, and apoptosis in the mouse model of Poly Cystic Ovary Syndrome (PCOS). MATERIALS AND METHODS 80 female NMRI mice have been randomly divided into eight groups. Group 1 received normal saline as a control, and Group 2 received estradiol valerate (EV) at 4 mg/100 g of body weight. Moreover, Groups 3-4 were administered with RA (a dose of 0.05 μg/μl) and FGF2 (a dose of 0.01 μg/kg), respectively. Groups 5 and 6 respectively received the EV plus the RA (0.05 μg/μl) and FGF2 (0.01 μg/kg). Group 7 received the RA and FGF2 at doses corresponding to healthy mice, and Group 8 received the EV plus the RA + FGF2 (similar to previous doses). RA and FGF2 were injected three times per week for four weeks. Finally, histological and immunohistological parameters of the ovary were evaluated. RESULTS The study revealed that both single and combined injection of fibroblast growth factor-2 (FGF2) and retinoic acid (RA) in groups 5, 6, and 8 significantly reduced follicular diameters compared to group 2. Measurements confirmed that simultaneous injection of RA and FGF2 into polycystic mice significantly increased antral follicles, corpus luteum (CL), epithelial thickness, and oocyte diameter as well as decreased cystic follicles. Positive TUNEL cells that were considerably increased in the antral follicle of group 2 significantly decreased in the RA and FGF2 recipient groups, either alone or in combination. Besides, the injection of FGF2 increased preantral follicles and CL. CONCLUSION The findings of the present investigation reveal that injection of RA and FGF2 has both protective and ameliorative effects that can promise new therapies for women with PCOS.
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Lu T, Zou X, Liu G, Deng M, Sun B, Guo Y, Liu D, Li Y. A Preliminary Study on the Characteristics of microRNAs in Ovarian Stroma and Follicles of Chuanzhong Black Goat during Estrus. Genes (Basel) 2020; 11:genes11090970. [PMID: 32825655 PMCID: PMC7564575 DOI: 10.3390/genes11090970] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 08/16/2020] [Accepted: 08/19/2020] [Indexed: 02/08/2023] Open
Abstract
microRNAs (miRNAs) play a significant role in ovarian follicular maturity, but miRNA expression patterns in ovarian stroma (OS), large follicles (LF), and small follicles (SF) have been rarely explored. We herein aimed to identify miRNAs, their target genes and signaling pathways, as well as their interaction networks in OS, LF, and SF of Chuanzhong black goats at the estrus phase using small RNA-sequencing. We found that the miRNA expression profiles of LF and SF were more similar than those of OS—32, 16, and 29 differentially expressed miRNAs were identified in OS vs. LF, OS vs. SF, and LF vs. SF, respectively. Analyses of functional enrichment and the miRNA-targeted gene interaction network suggested that miR-182 (SMC3), miR-122 (SGO1), and miR-206 (AURKA) were involved in ovarian organogenesis and hormone secretion by oocyte meiosis. Furthermore, miR-202-5p (EREG) and miR-485-3p (FLT3) were involved in follicular maturation through the MAPK signaling pathway, and miR-2404 (BMP7 and CDKN1C) played a key role in follicular development through the TGF-β signaling pathway and cell cycle; nevertheless, further research is warranted. To our knowledge, this is the first study to investigate miRNA expression patterns in OS, LF, and SF of Chuanzhong black goats during estrus. Our findings provide a theoretical basis to elucidate the role of miRNAs in follicular maturation. These key miRNAs might provide candidate biomarkers for the diagnosis of follicular maturation and will assist in developing new therapeutic targets for female goat infertility.
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Affiliation(s)
- Tingting Lu
- College of Animal Science, South China Agricultural University, Guangzhou 510642, China; (T.L.); (X.Z.); (G.L.); (M.D.); (B.S.); (Y.G.); (D.L.)
| | - Xian Zou
- College of Animal Science, South China Agricultural University, Guangzhou 510642, China; (T.L.); (X.Z.); (G.L.); (M.D.); (B.S.); (Y.G.); (D.L.)
- State Key Laboratory of Livestock and Poultry Breeding, Guangdong Key Laboratory of Animal Breeding and Nutrition, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
| | - Guangbin Liu
- College of Animal Science, South China Agricultural University, Guangzhou 510642, China; (T.L.); (X.Z.); (G.L.); (M.D.); (B.S.); (Y.G.); (D.L.)
| | - Ming Deng
- College of Animal Science, South China Agricultural University, Guangzhou 510642, China; (T.L.); (X.Z.); (G.L.); (M.D.); (B.S.); (Y.G.); (D.L.)
| | - Baoli Sun
- College of Animal Science, South China Agricultural University, Guangzhou 510642, China; (T.L.); (X.Z.); (G.L.); (M.D.); (B.S.); (Y.G.); (D.L.)
| | - Yongqing Guo
- College of Animal Science, South China Agricultural University, Guangzhou 510642, China; (T.L.); (X.Z.); (G.L.); (M.D.); (B.S.); (Y.G.); (D.L.)
| | - Dewu Liu
- College of Animal Science, South China Agricultural University, Guangzhou 510642, China; (T.L.); (X.Z.); (G.L.); (M.D.); (B.S.); (Y.G.); (D.L.)
| | - Yaokun Li
- College of Animal Science, South China Agricultural University, Guangzhou 510642, China; (T.L.); (X.Z.); (G.L.); (M.D.); (B.S.); (Y.G.); (D.L.)
- Correspondence: ; Tel.: +86-1862-019-3682
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13
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Newly Identified Regulators of Ovarian Folliculogenesis and Ovulation. Int J Mol Sci 2020; 21:ijms21124565. [PMID: 32604954 PMCID: PMC7349727 DOI: 10.3390/ijms21124565] [Citation(s) in RCA: 74] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 06/19/2020] [Accepted: 06/23/2020] [Indexed: 02/06/2023] Open
Abstract
Each follicle represents the basic functional unit of the ovary. From its very initial stage of development, the follicle consists of an oocyte surrounded by somatic cells. The oocyte grows and matures to become fertilizable and the somatic cells proliferate and differentiate into the major suppliers of steroid sex hormones as well as generators of other local regulators. The process by which a follicle forms, proceeds through several growing stages, develops to eventually release the mature oocyte, and turns into a corpus luteum (CL) is known as “folliculogenesis”. The task of this review is to define the different stages of folliculogenesis culminating at ovulation and CL formation, and to summarize the most recent information regarding the newly identified factors that regulate the specific stages of this highly intricated process. This information comprises of either novel regulators involved in ovarian biology, such as Ube2i, Phoenixin/GPR73, C1QTNF, and α-SNAP, or recently identified members of signaling pathways previously reported in this context, namely PKB/Akt, HIPPO, and Notch.
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14
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Sun T, Diaz FJ. Ovulatory signals alter granulosa cell behavior through YAP1 signaling. Reprod Biol Endocrinol 2019; 17:113. [PMID: 31883523 PMCID: PMC6935177 DOI: 10.1186/s12958-019-0552-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Accepted: 11/29/2019] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND The Hippo pathway plays critical roles in regulating cell proliferation, differentiation and survival among species. Hippo pathway proteins are expressed in the ovary and are involved in ovarian function. Deletion of Lats1 causes germ cell loss, ovarian stromal tumors and reduced fertility. Ovarian fragmentation induces nuclear YAP1 accumulation and increased follicular development. At ovulation, follicular cells stop proliferating and terminally differentiate, but the mechanisms controlling this transition are not completely known. Here we explore the role of Hippo signaling in mouse granulosa cells before and during ovulation. METHODS To assess the effect of oocytes on Hippo transcripts in cumulus cells, cumulus granulosa cells were cultured with oocytes and cumulus oocyte complexes (COCs) were cultured with a pSMAD2/3 inhibitor. Secondly, to evaluate the criticality of YAP1 on granulosa cell proliferation, mural granulosa cells were cultured with oocytes, YAP1-TEAD inhibitor verteporfin or both, followed by cell viability assay. Next, COCs were cultured with verteporfin to reveal its role during cumulus expansion. Media progesterone levels were measured using ELISA assay and Hippo transcripts and expansion signatures from COCs were assessed. Lastly, the effects of ovulatory signals (EGF in vitro and hCG in vivo) on Hippo protein levels and phosphorylation were examined. Throughout, transcripts were quantified by qRT-PCR and proteins were quantified by immunoblotting. Data were analyzed by student's t-test or one-way ANOVA followed by Tukey's post-hoc test or Dunnett's post-hoc test. RESULTS Our data show that before ovulation oocytes inhibit expression of Hippo transcripts and promote granulosa cell survival likely through YAP1. Moreover, the YAP1 inhibitor verteporfin, triggers premature differentiation as indicated by upregulation of expansion transcripts and increased progesterone production from COCs in vitro. In vivo, ovulatory signals cause an increase in abundance of Hippo transcripts and stimulate Hippo pathway activity as indicated by increased phosphorylation of the Hippo targets YAP1 and WWTR1 in the ovary. In vitro, EGF causes a transient increase in YAP1 phosphorylation followed by decreased YAP1 protein with only modest effects on WWTR1 in COCs. CONCLUSIONS Our results support a YAP1-mediated mechanism that controls cell survival and differentiation of granulosa cells during ovulation.
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Affiliation(s)
- Tianyanxin Sun
- Department of Obstetrics and Gynecology, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Francisco J Diaz
- Center for Reproductive Biology and Health and Department of Animal Science, The Pennsylvania State University, 313 FRL Building, University Park, PA, 16802, USA.
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15
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Plewes MR, Hou X, Zhang P, Liang A, Hua G, Wood JR, Cupp AS, Lv X, Wang C, Davis JS. Yes-associated protein 1 is required for proliferation and function of bovine granulosa cells in vitro†. Biol Reprod 2019; 101:1001-1017. [PMID: 31350850 PMCID: PMC6877782 DOI: 10.1093/biolre/ioz139] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 05/28/2019] [Accepted: 06/25/2019] [Indexed: 02/07/2023] Open
Abstract
Yes-associated protein 1 (YAP1) is a major component of the Hippo signaling pathway. Although the exact extracellular signals that control the Hippo pathway are currently unknown, increasing evidence supports a critical role for the Hippo pathway in embryonic development, regulation of organ size, and carcinogenesis. Granulosa cells (GCs) within the ovarian follicle proliferate and produce steroids and growth factors, which facilitate the growth of follicle and maturation of the oocyte. We hypothesize that YAP1 plays a role in proliferation and estrogen secretion of GCs. In the current study, we examined the expression of the Hippo signaling pathway in bovine ovaries and determined whether it was important for GC proliferation and estrogen production. Mammalian STE20-like protein kinase 1 (MST1) and large tumor suppressor kinase 2 (LATS2) were identified as prominent upstream components of the Hippo pathway expressed in granulosa and theca cells of the follicle and large and small cells of the corpus luteum. Immunohistochemistry revealed that YAP1 was localized to the nucleus of growing follicles. In vitro, nuclear localization of the downstream Hippo signaling effector proteins YAP1 and transcriptional co-activator with PDZ-binding motif (TAZ) was inversely correlated with GC density, with greater nuclear localization under conditions of low cell density. Treatment with verteporfin and siRNA targeting YAP1 or TAZ revealed a critical role for these transcriptional co-activators in GC proliferation. Furthermore, knockdown of YAP1 in GCs inhibited follicle-stimulating hormone (FSH)-induced estradiol biosynthesis. The data indicate that Hippo pathway transcription co-activators YAP1/TAZ play an important role in GC proliferation and estradiol synthesis, two processes necessary for maintaining normal follicle development.
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Affiliation(s)
- Michele R Plewes
- Department of Obstetrics and Gynecology, Olson Center for Women's Health, University of Nebraska Medical Center, Omaha, NE, USA
- Veterans Affairs Nebraska Western Iowa Health Care System, Omaha, NE, USA
| | - Xiaoying Hou
- Department of Obstetrics and Gynecology, Olson Center for Women's Health, University of Nebraska Medical Center, Omaha, NE, USA
| | - Pan Zhang
- Department of Obstetrics and Gynecology, Olson Center for Women's Health, University of Nebraska Medical Center, Omaha, NE, USA
| | - Aixin Liang
- Department of Obstetrics and Gynecology, Olson Center for Women's Health, University of Nebraska Medical Center, Omaha, NE, USA
- College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Guohua Hua
- Department of Obstetrics and Gynecology, Olson Center for Women's Health, University of Nebraska Medical Center, Omaha, NE, USA
- College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Jennifer R Wood
- Department of Animal Sciences, University of Nebraska–Lincoln, Lincoln, NE, USA
| | - Andrea S Cupp
- Department of Animal Sciences, University of Nebraska–Lincoln, Lincoln, NE, USA
| | - Xiangmin Lv
- Department of Obstetrics and Gynecology, Olson Center for Women's Health, University of Nebraska Medical Center, Omaha, NE, USA
| | - Cheng Wang
- Department of Obstetrics and Gynecology, Olson Center for Women's Health, University of Nebraska Medical Center, Omaha, NE, USA
| | - John S Davis
- Department of Obstetrics and Gynecology, Olson Center for Women's Health, University of Nebraska Medical Center, Omaha, NE, USA
- Veterans Affairs Nebraska Western Iowa Health Care System, Omaha, NE, USA
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16
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Lv X, He C, Huang C, Wang H, Hua G, Wang Z, Zhou J, Chen X, Ma B, Timm BK, Maclin V, Dong J, Rueda BR, Davis JS, Wang C. Timely expression and activation of YAP1 in granulosa cells is essential for ovarian follicle development. FASEB J 2019; 33:10049-10064. [PMID: 31199671 DOI: 10.1096/fj.201900179rr] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Although the role of the Hippo signaling pathway in development and tumorigenesis has been extensively studied in multiple organs, its role in ovarian follicle development remains largely unknown. Here, we report that Yes-Associated Protein 1 (YAP1), the major effector of Hippo signaling, is spatiotemporally expressed in ovarian granulosa cells and plays a critical role in the regulation of follicle development. We found that the active form of YAP1 (nuclear YAP1) was predominantly expressed in proliferative granulosa cells, whereas the inactive form of YAP1 (cytoplasmic YAP1) was mainly detected in luteal cells (terminally differentiated granulosa cells). Pharmacological inhibition of YAP1 activity disrupted mouse ovarian follicle development in vitro and in vivo. Foxl2 promoter-driven knockout of Yap1 in ovarian granulosa cells resulted in increased apoptosis of granulosa cells, decreased number of corpora lutea, reduced ovarian size, and subfertility in transgenic mice. However, Cyp19a1 promoter-driven knockout of Yap1 in differentiated granulosa cells of preovulatory follicles and luteal cells of corpora lutea had no effect on ovarian morphology and fertility. Mechanistic studies demonstrated that YAP1 interacted with epidermal growth factor receptor and TGF-β signaling pathways to regulate granulosa cell proliferation, differentiation, and survival. Results from this study identify YAP1 as a critical regulator of granulosa cell proliferation and differentiation. Balanced expression and activation of YAP1 is essential for follicle development and successful reproduction. YAP1 is a promising target for treatment of subfertility associated with abnormal granulosa cell function.-Lv, X., He, C., Huang, C., Wang, H., Hua, G., Wang, Z., Zhou, J., Chen, X., Ma, B., Timm, B. K., Maclin, V., Dong, J., Rueda, B. R., Davis, J. S., Wang, C. Timely expression and activation of YAP1 in granulosa cells is essential for ovarian follicle development.
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Affiliation(s)
- Xiangmin Lv
- Vincent Center for Reproductive Biology, Department of Obstetrics and Gynecology, Massachusetts General Hospital-Harvard Medical School, Boston, Massachusetts, USA.,Department of Obstetrics and Gynecology, Olson Center for Women's Health, University of Nebraska Medical Center, Omaha, Nebraska, USA
| | - Chunbo He
- Vincent Center for Reproductive Biology, Department of Obstetrics and Gynecology, Massachusetts General Hospital-Harvard Medical School, Boston, Massachusetts, USA.,Department of Obstetrics and Gynecology, Olson Center for Women's Health, University of Nebraska Medical Center, Omaha, Nebraska, USA.,College of Animal Sciences and Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Cong Huang
- Vincent Center for Reproductive Biology, Department of Obstetrics and Gynecology, Massachusetts General Hospital-Harvard Medical School, Boston, Massachusetts, USA
| | - Hongbo Wang
- Vincent Center for Reproductive Biology, Department of Obstetrics and Gynecology, Massachusetts General Hospital-Harvard Medical School, Boston, Massachusetts, USA.,Guangdong Province Key Laboratory of Liver Disease Research, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Guohua Hua
- Department of Obstetrics and Gynecology, Olson Center for Women's Health, University of Nebraska Medical Center, Omaha, Nebraska, USA.,College of Animal Sciences and Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Zhengfeng Wang
- Department of Obstetrics and Gynecology, Olson Center for Women's Health, University of Nebraska Medical Center, Omaha, Nebraska, USA
| | - Jin Zhou
- Department of Obstetrics and Gynecology, Olson Center for Women's Health, University of Nebraska Medical Center, Omaha, Nebraska, USA.,Department of Obstetrics and Gynecology, The Eighth Affiliated Hospital of Sun Yat-Sen University, Shenzhen, China
| | - Xingcheng Chen
- Fred and Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, Nebraska, USA.,Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, Nebraska, USA
| | - Bowen Ma
- Department of Obstetrics and Gynecology, Olson Center for Women's Health, University of Nebraska Medical Center, Omaha, Nebraska, USA
| | - Barbara K Timm
- Heartland Center for Reproductive Medicine, PC, Omaha, Nebraska, USA
| | - Victoria Maclin
- Heartland Center for Reproductive Medicine, PC, Omaha, Nebraska, USA
| | - Jixin Dong
- Fred and Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, Nebraska, USA
| | - Bo R Rueda
- Vincent Center for Reproductive Biology, Department of Obstetrics and Gynecology, Massachusetts General Hospital-Harvard Medical School, Boston, Massachusetts, USA
| | - John S Davis
- Department of Obstetrics and Gynecology, Olson Center for Women's Health, University of Nebraska Medical Center, Omaha, Nebraska, USA.,Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, Nebraska, USA
| | - Cheng Wang
- Vincent Center for Reproductive Biology, Department of Obstetrics and Gynecology, Massachusetts General Hospital-Harvard Medical School, Boston, Massachusetts, USA.,Department of Obstetrics and Gynecology, Olson Center for Women's Health, University of Nebraska Medical Center, Omaha, Nebraska, USA
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17
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Chen B, Xu P, Wang J, Zhang C. The role of MiRNA in polycystic ovary syndrome (PCOS). Gene 2019; 706:91-96. [PMID: 31054362 DOI: 10.1016/j.gene.2019.04.082] [Citation(s) in RCA: 85] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Accepted: 04/30/2019] [Indexed: 12/31/2022]
Abstract
Polycystic ovary syndrome (PCOS) is a prevalent endocrine disorder in reproductive-aged women. Clinical manifestations include hyperandrogenism, chronic anovulation, polycystic ovaries and being frequently accompanied by insulin resistance (IR) and obesity. MicroRNAs (miRNAs) are short non-coding RNAs which are involved in the regulation of gene expression at the post-transcriptional level. Altered miRNAs levels have been showed to be associated with a variety of diseases including diabetes, endometriosis and cancer. In recent years, more and more evidence suggests abnormal expression of miRNAs are detected in granulosa cells, theca cells, adipose tissue, follicular fluid, serum and peripheral blood leukocytes of women with PCOS and display vital role in the occurrence and development of PCOS. This will shed light on new strategies for the diagnosis and treatment of this syndrome. In this paper, we will review the recent research on miRNAs with respect to PCOS.
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Affiliation(s)
- Baiqi Chen
- School of Public Health, Nanchang University, Nanchang, Jiangxi 330006, People's Republic of China
| | - Ping Xu
- Second Clinical College, Nanchang University, Nanchang, Jiangxi 330006, People's Republic of China
| | - Jing Wang
- Department of Microbiology, Nanchang University, Nanchang, Jiangxi 330006, People's Republic of China
| | - Chunping Zhang
- Department of Cell Biology, School of Medicine, Nanchang University, Nanchang, Jiangxi 330006, China.
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18
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Photobiomodulation can improve ovarian activity in polycystic ovary syndrome-induced rats. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2019; 194:6-13. [PMID: 30897401 DOI: 10.1016/j.jphotobiol.2019.03.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Revised: 12/04/2018] [Accepted: 03/10/2019] [Indexed: 11/20/2022]
Abstract
Follicular cystic ovary disease is a common reproductive disorder in women and females of domestic animals, characterized by anovulation and the persistence of follicle is a common cause of reproductive failure in mammalian. Polycystic ovary syndrome (PCOS) is characterized by hyperandrogenism (HA), chronic anovulation and polycystic ovaries, and it is a common reproductive endocrine disease with clinical manifestations including hirsutism, acne, infertility and obesity that can affect 5-20% of women in their reproductive age. Photobiomodulation (PBM) has been investigated and used in clinical practice, related to biomodulatory influences on cellular functions in animals and humans, both in vivo and in vitro. In this study, we include endocrine and reproductive features in a rat model for PCOS and the effects of PBM on ovarian activities. Forty-five adult female Wistar rats PCOS-induced by a single dose of the estradiol valerate (EV) were used in the study. After the EV injection for PCO induction, rats were divided into 9 groups (n = 5/group) named C30, C45 and C60 (Control group), S30, S45 and S60 (PCO group) and L30, L45 and L60 (PCO/Laser group). The rats were irradiated with laser 3 times/week. The results shown that EV PCO-induced rats had increased body mass, reduced ovary mass, and reduced GSI. The plasma levels of P4 and T were increased, and the LH plasma level was decreased by PBM stimulation. The number of ovarian follicles and corpus luteum were increased, and the number of ovarian cysts was decreased by PBM stimulation. Thus, reproductive and endocrine characteristics were modulated by PBM.
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19
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Tri-ortho-cresyl phosphate (TOCP) induced ovarian failure in mice is related to the Hippo signaling pathway disruption. Reprod Toxicol 2019; 83:21-27. [DOI: 10.1016/j.reprotox.2018.10.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Revised: 09/27/2018] [Accepted: 10/13/2018] [Indexed: 01/25/2023]
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20
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Long-term apoptosis-related protein expression in the diabetic mouse ovary. PLoS One 2018; 13:e0203268. [PMID: 30192809 PMCID: PMC6128485 DOI: 10.1371/journal.pone.0203268] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2017] [Accepted: 08/19/2018] [Indexed: 02/06/2023] Open
Abstract
Emerging evidence has shown that oocytes from diabetic ovaries exhibit delayed maturation, mitochondrial dysfunction and meiotic defects, which are related increased apoptosis. The main objective of the present study was to analyze the apoptosis pathways activated during follicular loss at multiple time points in a diabetic mouse model. Twenty BALB/c mice were used in this study, and diabetes mellitus was induced by streptozotocin injection. Three diabetic and two control animals were sacrificed on days 15, 20, 70 and 80 posttreatment. The ovaries were then removed; one was used for follicular counting, TUNEL, immunohistochemistry and immunofluorescence, while the other was used for Western blot analysis. The proteins studied were BAX, BCL2, t-BID, FAS, FASL, active caspase 8, active caspase 9 and active caspase 3. Follicular apoptosis decreased over time, with the highest values observed at 15 days posttreatment. Granulosa cells were positive for active caspase 3, which showed constant expression levels at all time points. FAS, FASL, t-BID and active caspase 8 showed strong cytoplasmic immunostaining in the oocytes and granulosa cells of the diabetic mice, with significant increases observed at 15, 20 and 70 days posttreatment. BAX expression was slightly higher in the diabetic mouse ovaries than in the control ovaries at 15, 20 and 70 days posttreatment, whereas the highest active caspase 9 expression was at observed 20 days posttreatment. Low BCL2 protein levels were detected in the diabetic mouse ovaries at all time points. This study describes for the first time the behavior of apoptosis-related proteins in the diabetic mouse ovary and shows not only that the FAS/FASL pathway contributes to follicular loss but also that antral follicles are the most affected.
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21
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Maas K, Mirabal S, Penzias A, Sweetnam PM, Eggan KC, Sakkas D. Hippo signaling in the ovary and polycystic ovarian syndrome. J Assist Reprod Genet 2018; 35:1763-1771. [PMID: 30120633 DOI: 10.1007/s10815-018-1235-0] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2017] [Accepted: 06/08/2018] [Indexed: 01/07/2023] Open
Abstract
PURPOSE To provide a commentary on our understanding of the role that the Hippo signaling pathway may play in patients with polycystic ovarian syndrome (PCOS) and how this understanding may impact the diagnosis of PCOS. METHODS We assessed publications discussing the role of the Hippo signaling pathway in the ovary. In particular, we discuss how Hippo signaling disruption after ovarian fragmentation, combined with treating ovarian fragments with phosphatase and tensin homolog (PTEN) inhibitors and phosphoinositide-3-kinase stimulators to augment AKT signaling, has been used in treatment of patients with primary ovarian insufficiency. Furthermore, we discuss our own data on variations in Hippo signaling pathway gene expression in cumulus cells isolated from women undergoing IVF with a previous diagnosis of PCOS. RESULTS AND CONCLUSIONS Aberrant Hippo signaling in PCOS patients is likely a contributing mechanism to the multifactorial etiology of the disease. Given the challenge of discerning the underlying etiology of oligo-ovulation in some patients, especially those with normal body mass indices, and the need for customized stimulation protocols for PCOS patients who have an increased risk of over-response and higher percentage of immature oocyte yield, it is important to identify these patients prior to treatment. Hippo gene expression fingerprints could potentially be used to more accurately define patients with PCOS. Additionally, targeting this pathway with pharmacologic agents could lead to non-surgical therapeutic options for PCOS.
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Affiliation(s)
- Kristi Maas
- Boston IVF, 130 Second Ave., Waltham, MA, 02451, USA.,OB/GYN, REI Division, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA.,Fertility Specialists Medical Group, 8010 Frost Street Suite P, San Diego, CA, 92123, USA
| | - Sheyla Mirabal
- CellBridge LLC, Salem, MA, USA.,Nano Terra Inc, Cambridge, MA, USA
| | - Alan Penzias
- Boston IVF, 130 Second Ave., Waltham, MA, 02451, USA.,OB/GYN, REI Division, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Paul M Sweetnam
- CellBridge LLC, Salem, MA, USA.,Nano Terra Inc, Cambridge, MA, USA
| | | | - Denny Sakkas
- Boston IVF, 130 Second Ave., Waltham, MA, 02451, USA.
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22
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Hu LL, Su T, Luo RC, Zheng YH, Huang J, Zhong ZS, Nie J, Zheng LP. Hippo pathway functions as a downstream effector of AKT signaling to regulate the activation of primordial follicles in mice. J Cell Physiol 2018; 234:1578-1587. [PMID: 30078193 DOI: 10.1002/jcp.27024] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Accepted: 06/25/2018] [Indexed: 12/31/2022]
Abstract
Clarifying the molecular mechanisms by which primordial follicles are initiated is crucial for the prevention and treatment of female infertility and ovarian dysfunction. The Hippo pathway has been proven to have a spatiotemporal correlation with the size of the primordial follicle pool in mice in our previous work. But the role and underlying mechanisms of the Hippo pathway in primordial follicle activation remain unclear. Here, the localization and expression of the core components were examined in primordial follicles before and after activation. And the effects of the Hippo pathway on primordial follicle activation were determined by genetically manipulating yes-associated protein 1 (Yap1), the key transcriptional effector. Furthermore, an AKT specific inhibitor (MK2206) was added to determine the interaction between the Hippo pathway and AKT, an important signaling regulator of ovarian function. Results showed that the core components of the Hippo pathway were localized in both primordial and primary follicles and the expression levels of them changed significantly during the initiation of primordial follicles. Yap1 knockdown suppressed primordial follicle activation, while its overexpression led to the opposite trend. MK2206 downregulated the ratio of P-MST/MST1 and upregulated the ratio of P-YAP1/YAP1 significantly, whereas Yap1-treatment had no influence on AKT. In addition, YAP1 upregulation partially rescued the suppression of the primordial follicle activation induced by MK2206. Our findings revealed that the Hippo-YAP1 regulates primordial follicular activation, which is mediated by AKT signaling in mice, thus providing direct and new evidence to highlight the role of Hippo signaling in regulating ovarian follicles development.
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Affiliation(s)
- Liao-Liao Hu
- Department of Physiology, Jiangxi Medical College, Nanchang University, Nanchang, China
- Department of Reproductive Physiology, Jiangxi Key Laboratory of Reproductive Physiology and Pathology, Nanchang, China
| | - Tie Su
- Department of Physiology, Jiangxi Medical College, Nanchang University, Nanchang, China
- Department of Reproductive Physiology, Jiangxi Key Laboratory of Reproductive Physiology and Pathology, Nanchang, China
| | - Rui-Chen Luo
- Department of Physiology, Jiangxi Medical College, Nanchang University, Nanchang, China
- Department of Reproductive Physiology, Jiangxi Key Laboratory of Reproductive Physiology and Pathology, Nanchang, China
| | - Yue-Hui Zheng
- Department of Physiology, Jiangxi Medical College, Nanchang University, Nanchang, China
- Department of Reproductive Physiology, Jiangxi Key Laboratory of Reproductive Physiology and Pathology, Nanchang, China
| | - Jian Huang
- Department of Physiology, Jiangxi Medical College, Nanchang University, Nanchang, China
- Department of Reproductive Physiology, Jiangxi Key Laboratory of Reproductive Physiology and Pathology, Nanchang, China
| | - Zhi-Sheng Zhong
- Department of Physiology, Jiangxi Medical College, Nanchang University, Nanchang, China
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Jing Nie
- Department of Physiology, Jiangxi Medical College, Nanchang University, Nanchang, China
| | - Li-Ping Zheng
- Department of Physiology, Jiangxi Medical College, Nanchang University, Nanchang, China
- Department of Reproductive Physiology, Jiangxi Key Laboratory of Reproductive Physiology and Pathology, Nanchang, China
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Kawashima I, Kawamura K. Regulation of follicle growth through hormonal factors and mechanical cues mediated by Hippo signaling pathway. Syst Biol Reprod Med 2017; 64:3-11. [PMID: 29224376 DOI: 10.1080/19396368.2017.1411990] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The ovary is an interesting organ that shows major structural changes within a short period of time during each reproductive cycle. Follicle development is controlled by local paracrine and systemic endocrine factors. Many hormonal and molecular analyses have been conducted to find the mechanisms underlying structural changes in ovaries, However, exact mechanisms still remain to be determined. Recent development of mechanobiology facilitates the understanding on the contribution of physical forces and changes in the mechanical properties of cells and tissues to physiology and pathophysiology. The Hippo signaling pathway is one of the key players in mechanotransduction, providing an understanding of the molecular mechanisms by which cells sense and respond to mechanical signals to regulate cell proliferation and apoptosis for maintaining optimal organ sizes. Our group recently demonstrated the involvement of the Hippo signaling pathway in the regulation of ovarian follicle development. Fragmentation of ovarian cortex into small cubes changed cytoskeletal actin dynamics and induced disruption of the Hippo signaling pathway, leading to the production of CCN growth factors and anti-apoptotic BIRC. These factors, in turn, stimulated secondary follicle growth in vitro and in vivo. In this review, we summarized hormonal regulation of follicular structural changes and further focused on the role of Hippo signaling in the regulation of follicle development. We also suggest a new strategy of infertility treatments in patients with polycystic ovary syndrome and primary ovarian insufficiency based on mechanobiology.
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Affiliation(s)
- Ikko Kawashima
- a Department of Obstetrics and Gynecology , St. Marianna University School of Medicine , Kawasaki City , Kanagawa , Japan
| | - Kazuhiro Kawamura
- a Department of Obstetrics and Gynecology , St. Marianna University School of Medicine , Kawasaki City , Kanagawa , Japan
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Pathak S, Banerjee A, Meng WJ, Kumar Nandy S, Gopinath M, Sun XF. Significant expression of tafazzin (TAZ) protein in colon cancer cells and its downregulation by radiation. Int J Radiat Biol 2017; 94:79-87. [PMID: 29099643 DOI: 10.1080/09553002.2018.1400191] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Surajit Pathak
- Department of Oncology and Department of Clinical and Experimental Medicine, University of Linköping, Linköping, Sweden
- Chettinad Hospital & Research Institute (CHRI), Chettinad Academy of Research and Education (CARE), Kelambakkam, Chennai, India
| | - Antara Banerjee
- Chettinad Hospital & Research Institute (CHRI), Chettinad Academy of Research and Education (CARE), Kelambakkam, Chennai, India
| | - Wen-Jian Meng
- Department of Oncology and Department of Clinical and Experimental Medicine, University of Linköping, Linköping, Sweden
- Department of Gastrointestinal Surgery, West China Hospital, Sichuan University, Chengdu, China
| | - Suman Kumar Nandy
- Department of Biochemistry and Biophysics, University of Kalyani, Kalyani, India
- Bioinformatics Centre, Department of RDAP, North-Eastern Hill University, Tura Campus, Tura, India
| | - Madhumala Gopinath
- Chettinad Hospital & Research Institute (CHRI), Chettinad Academy of Research and Education (CARE), Kelambakkam, Chennai, India
| | - Xiao-Feng Sun
- Department of Oncology and Department of Clinical and Experimental Medicine, University of Linköping, Linköping, Sweden
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25
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Budna J, Bryja A, Celichowski P, Kranc W, Ciesiółka S, Borys S, Rybska M, Kolecka-Bednarczyk A, Jeseta M, Bukowska D, Antosik P, Brüssow KP, Bruska M, Nowicki M, Zabel M, Kempisty B. "Bone Development" Is an Ontology Group Upregulated in Porcine Oocytes Before In Vitro Maturation: A Microarray Approach. DNA Cell Biol 2017; 36:638-646. [PMID: 28574720 DOI: 10.1089/dna.2017.3677] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Mammalian cumulus-oocyte complexes (COCs) reach full developmental capability during folliculogenesis and oogenesis. It is well recognized that only gametes achieving MII stage after in vivo or in vitro maturation (IVM) are successfully fertilized by a single spermatozoon. Although the process of oocyte nuclear and/or cytoplasmic maturation in pigs is well determined, there exist many differences that promote these processes in vivo and in vitro. Therefore, this study aimed to investigate the differences in RNA expression profiles between porcine oocytes before and after IVM using microarray and real-time quantitative polymerase chain reaction (RT-qPCR) assays. Experiments were performed on oocytes isolated from 55 pubertal crossbred Landrace gilts. The oocytes were analyzed both before and after IVM and only Brilliant Cresyl Blue (BCB)-positive gametes were used for subsequent microarray analysis (Affymetrix) and RT-qPCR analysis. The microarray assay, which measures expression of 12,258 transcripts, revealed 419 differentially expressed transcripts in porcine oocytes, from which 379 were downregulated and 40 were upregulated before IVM compared to those analyzed after IVM. After DAVID analysis, we found eight different transcripts, including IHH, BMP1, WWTR1, CHRDL1, KLF10, EIF2AK3, MMP14, and STC1. Their expression is related to the "bone development" ontology group and was further subjected to hierarchical clusterization. Using RT-qPCR analysis, we confirmed the results of the microarray assay, showing increased expression of the eight genes in oocytes before IVM compared to oocytes after maturation in vitro. It has been suggested that "bone development" belongs to one ontological group involving genes substantially upregulated in porcine oocytes before IVM. We suggest that the gamete mRNA expression profile before IVM may comprise stored transcripts, which are templates for protein biosynthesis following fertilization. We also hypothesize that these mRNAs may be a specific "fingerprint" of folliculogenesis and oogenesis in pigs.
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Affiliation(s)
- Joanna Budna
- 1 Department of Histology and Embryology, Poznan University of Medical Sciences , Poznan, Poland
| | - Artur Bryja
- 2 Department of Anatomy, Poznan University of Medical Sciences , Poznan, Poland
| | - Piotr Celichowski
- 1 Department of Histology and Embryology, Poznan University of Medical Sciences , Poznan, Poland
| | - Wiesława Kranc
- 2 Department of Anatomy, Poznan University of Medical Sciences , Poznan, Poland
| | - Sylwia Ciesiółka
- 1 Department of Histology and Embryology, Poznan University of Medical Sciences , Poznan, Poland
| | - Sylwia Borys
- 2 Department of Anatomy, Poznan University of Medical Sciences , Poznan, Poland
| | - Marta Rybska
- 3 Institute of Veterinary Sciences, Poznan University of Life Sciences , Poznan, Poland
| | | | - Michal Jeseta
- 5 Department of Obstetrics and Gynecology, University Hospital and Masaryk University , Brno, Czech Republic
| | - Dorota Bukowska
- 3 Institute of Veterinary Sciences, Poznan University of Life Sciences , Poznan, Poland
| | - Paweł Antosik
- 3 Institute of Veterinary Sciences, Poznan University of Life Sciences , Poznan, Poland
| | - Klaus P Brüssow
- 2 Department of Anatomy, Poznan University of Medical Sciences , Poznan, Poland
| | - Małgorzata Bruska
- 2 Department of Anatomy, Poznan University of Medical Sciences , Poznan, Poland
| | - Michał Nowicki
- 1 Department of Histology and Embryology, Poznan University of Medical Sciences , Poznan, Poland
| | - Maciej Zabel
- 1 Department of Histology and Embryology, Poznan University of Medical Sciences , Poznan, Poland
| | - Bartosz Kempisty
- 1 Department of Histology and Embryology, Poznan University of Medical Sciences , Poznan, Poland .,2 Department of Anatomy, Poznan University of Medical Sciences , Poznan, Poland
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26
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Lorthongpanich C, Jiamvoraphong N, Supraditaporn K, Klaihmon P, U-Pratya Y, Issaragrisil S. The Hippo pathway regulates human megakaryocytic differentiation. Thromb Haemost 2016; 117:116-126. [PMID: 27786336 DOI: 10.1160/th16-07-0564] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Accepted: 09/29/2016] [Indexed: 11/05/2022]
Abstract
The Hippo pathway is involved in several biological processes in both flies and mammals. Recent studies have shown that the Hippo pathway regulates Drosophila's haematopoiesis; however, understanding of its role in mammalian haematopoiesis is still limited. In flies, deletion of the Hippo component gene, Warts, affects crystal cell differentiation. We explored the role of the Hippo pathway in human haematopoiesis focusing on megakaryopoiesis. To investigate the role of LATS1/2 (a mammalian homolog of Warts) in human megakaryoblastic cell differentiation and platelet formation, megakaryoblastic cell (MEG-01) line was used as a model to gain insight into mechanism of the Hippo pathway in mammalian megakaryopoiesis. Effect of LATS1/2 on megakaryoblastic cell differentiation and platelet production were determined by functional changes. We found that depletion of LATS1/2 resulted in an increase of CD41+ megakaryocytes with impaired platelet biogenesis. Our study shows that the Hippo signalling pathway plays a crucial role in human megakaryoblastic cell differentiation and thrombopoiesis.
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Affiliation(s)
| | | | | | | | | | - Surapol Issaragrisil
- Prof. Surapol Issaragrisil, Division of Hematology, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand, Tel.: +662 419 4448-50, Fax: +662 411 2012, E-mail:
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27
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Abbassi L, Malki S, Cockburn K, Macaulay A, Robert C, Rossant J, Clarke HJ. Multiple Mechanisms Cooperate to Constitutively Exclude the Transcriptional Co-Activator YAP from the Nucleus During Murine Oogenesis. Biol Reprod 2016; 94:102. [PMID: 26985001 PMCID: PMC4939736 DOI: 10.1095/biolreprod.115.137968] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Accepted: 03/10/2016] [Indexed: 11/01/2022] Open
Abstract
Reproduction depends on the generation of healthy oocytes. Improving therapeutic strategies to prolong or rescue fertility depends on identifying the inter- and intracellular mechanisms that direct oocyte development under physiological conditions. Growth and proliferation of multiple cell types is regulated by the Hippo signaling pathway, whose chief effectors are the transcriptional co-activator YAP and its paralogue WWTR1. To resolve conflicting results concerning the potential role of Hippo in mammalian oocyte development, we systematically investigated the expression and localization of YAP in mouse oocytes. We report that that YAP is expressed in the germ cells beginning as early as Embryonic Day 15.5 and subsequently throughout pre- and postnatal oocyte development. However, YAP is restricted to the cytoplasm at all stages. YAP is phosphorylated at serine-112 in growing and fully grown oocytes, identifying a likely mechanistic basis for its nuclear exclusion, and becomes dephosphorylated at this site during meiotic maturation. Phosphorylation at serine-112 is regulated by a mechanism dependent on cyclic AMP and protein kinase A, which is known to be active in oocytes prior to maturation. Growing oocytes also contain a subpopulation of YAP, likely dephosphorylated, that is able enter the oocyte nucleus, but it is not retained there, implying that oocytes lack the cofactors required to retain YAP in the nucleus. Thus, although YAP is expressed throughout oocyte development, phosphorylation-dependent and -independent mechanisms cooperate to ensure that it does not accumulate in the nucleus. We conclude that nuclear YAP does not play a significant physiological role during oocyte development in mammals.
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Affiliation(s)
- Laleh Abbassi
- Department of Obstetrics and Gynecology, McGill University Health Centre, Montreal, Canada Division of Experimental Medicine, McGill University Health Centre, Montreal, Canada Research Institute of the McGill University Health Centre, Montreal, Canada
| | - Safia Malki
- Department of Embryology, Carnegie Institution for Science, Baltimore, Maryland
| | - Katie Cockburn
- Program in Developmental and Stem Cell Biology, The Hospital for Sick Children Research Institute, Toronto, Canada
| | - Angus Macaulay
- Département des sciences animales, Université Laval, Québec, Canada
| | - Claude Robert
- Département des sciences animales, Université Laval, Québec, Canada
| | - Janet Rossant
- Program in Developmental and Stem Cell Biology, The Hospital for Sick Children Research Institute, Toronto, Canada
| | - Hugh J Clarke
- Department of Obstetrics and Gynecology, McGill University Health Centre, Montreal, Canada Division of Experimental Medicine, McGill University Health Centre, Montreal, Canada Department of Biology, McGill University, McGill University Health Centre, Montreal, Canada Research Institute of the McGill University Health Centre, Montreal, Canada
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