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Karstensen S, Kaiser K, Moos C, Poulsen TS, Jochumsen K, Høgdall C, Lauszus F, Høgdall E. DNA alterations in ovarian adult granulosa cell tumours: A scoping review protocol. PLoS One 2024; 19:e0303989. [PMID: 38875223 PMCID: PMC11178167 DOI: 10.1371/journal.pone.0303989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Accepted: 05/03/2024] [Indexed: 06/16/2024] Open
Abstract
BACKGROUND Identifying and describing molecular alterations in tumors has become common with the development of high-throughput sequencing. However, DNA sequencing in rare tumors, such as ovarian adult granulosa cell tumor (aGCT), often lacks statistical power due to the limited number of cases in each study. Questions regarding personalized treatment or prognostic biomarkers for recurrence or other malignancies therefore still need to be elucidated. This scoping review protocol aims to systematically map the current evidence and identify knowledge gaps regarding DNA alterations, actionable variations and prognostic biomarkers in aGCT. METHODS This scoping review will be conducted based on Arksey and O'Malley's methodological framework and later modifications by JBI Evidence Synthesis. The protocol complies with Preferred Reporting Items for Systematic Reviews and Meta-Analyses extension for scoping reviews. All original publications describing molecular alterations of aGCT will be included. The search will be performed in May 2024 in the following databases: MEDLINE (Ovid), Embase (Ovid), Web of Science Core Collection and Google Scholar (100-top ranked). DISCUSSION This scoping review will identify knowledge and gaps in the current understanding of the molecular landscape of aGCT, clinical trials on actionable variations and priorities for future research. As aGCT are rare, a possible limitation will be the small sample sizes and heterogenic study settings. SCOPING REVIEW REGISTRATION The review protocol is registered at Open Science Framework under https://doi.org/10.17605/OSF.IO/PX4MF.
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Affiliation(s)
- Sven Karstensen
- Department of Womens’s Health, University of Southern Denmark, Sygehus Sønderjylland, Aabenraa, Denmark
| | - Karsten Kaiser
- Department of Womens’s Health, University of Southern Denmark, Sygehus Sønderjylland, Aabenraa, Denmark
| | - Caroline Moos
- Department of Clinical Research, University of Southern Denmark, Sygehus Sønderjylland, Aabenraa, Denmark
| | - Tim Svenstrup Poulsen
- Department of Pathology, Molecular Unit, University of Copenhagen, Herlev Hospital, Herlev, Denmark
| | - Kirsten Jochumsen
- Department of Gynecology, University of Southern Denmark, Odense University Hospital, Odense, Denmark
| | - Claus Høgdall
- Department of Gynecology, University of Copenhagen, Rigshospitalet, Copenhagen, Denmark
| | - Finn Lauszus
- Department of Womens’s Health, University of Southern Denmark, Sygehus Sønderjylland, Aabenraa, Denmark
| | - Estrid Høgdall
- Department of Pathology, Molecular Unit, University of Copenhagen, Herlev Hospital, Herlev, Denmark
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Prognostic predictors in recurrent adult granulosa cell tumors of the ovary: a systematic review and meta-analysis. Arch Gynecol Obstet 2021; 306:315-321. [PMID: 34799743 DOI: 10.1007/s00404-021-06305-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2021] [Accepted: 10/18/2021] [Indexed: 10/19/2022]
Abstract
BACKGROUND Ovarian adult granulosa cell tumours are low-grade malignant sex cord-stromal neoplasm with a low recurrence rate. Prognostic factors for recurrence include tumor stage, tumor rupture in Stage I neoplasms and the presence of residual tumors after surgery. However, in recurrent tumors, prognostic factors for overall survival (OS) are lacking. In the present paper, we conducted a systematic meta-analysis with the aim to assess prognostic factors for OS in patients with recurrent GCT. METHODS Electronic databases were searched for all studies assessing prognostic factors in recurrent adult granulosa cell tumor of the ovary. Student T test, Fisher's exact test and Kaplan-Meier survival analysis with long-rank test were used to assess differences among groups; a p value < 0.05 was considered significant. RESULTS Eleven studies analyzing 102 recurrent tumors were included in the systematic review. Tumor stage and localization of recurrent tumors were significantly associated with OS on Kaplan-Meier analysis; Cox regression analysis showed a HR of 0.879 for the stage II, of 3.052 for the stage III, and of 2.734 for stage IV tumor was significantly associated with OS (p = 0.037); observed HRs for abdominal and thoracic locations were of 2.405 and of 4.024, respectively. CONCLUSIONS In conclusion, the present article emphasizes the prognostic significance of tumor stage > II and extrapelvic anatomic sites of recurrences in patients with recurrent granuolase cell tumors of the ovary.
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Matos ACHDS, Consalter A, Dos Santos Batista BP, Fonseca ABM, Ferreira AMR, Leite JDS. Immunohistochemical expression of HER - 2 and Ki - 67 in granulosa cell tumor in bitches. Reprod Domest Anim 2021; 56:667-672. [PMID: 33527594 DOI: 10.1111/rda.13903] [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: 09/26/2020] [Revised: 01/21/2021] [Accepted: 01/24/2021] [Indexed: 11/28/2022]
Abstract
Granulosa cell tumour, an ovarian neoplasm of stromal origin, is an important tumour related to oestrogenic dominance syndrome and cystic endometrial hyperplasia-pyometra complex. In order to analyse ovarian tumour´s malignant potential, immunohistochemical markers can be used, such as anti-HER2 and anti-Ki-67. The aim of this study was to evaluate the expression of immunohistochemical markers HER-2 and Ki-67 in granulosa cell tumour from bitches´ ovaries. In HER-2 immunomarker analysis using the HercepTest® method, most tumours were classified as 2+ (moderate labelling). Concerning Ki-67 immunomarker, only one case was described as having a high proliferative index. An association was found between immunostained cell percentage by anti-HER-2 antibodies and high pleomorphism, represented by the pattern of follicular/trabecular tumour arrangement. There was no correlation between anti-Ki-67 and anti-HER-2 antibody immunostaining intensities, probably due to only one case with a high Ki-67 index. With an effective protocol for HER-2 and Ki-67 immunohistochemical identification in granulosa cell tumours in bitches, it was possible to characterize this neoplasm proliferation profile.
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Affiliation(s)
- Ana Carina Heil da Silva Matos
- Programa de Pós-Graduação em Medicina Veterinária (Clínica e Reprodução Animal), Universidade Federal Fluminense, Niterói, Brasil
| | - Angélica Consalter
- Programa de Pós-Graduação em Medicina Veterinária (Clínica e Reprodução Animal), Universidade Federal Fluminense, Niterói, Brasil
| | - Bárbara Paula Dos Santos Batista
- Programa de Pós-Graduação em Medicina Veterinária (Clínica e Reprodução Animal), Universidade Federal Fluminense, Niterói, Brasil
| | | | - Ana Maria Reis Ferreira
- Departamento de Patologia e Clínica Veterinária, Universidade Federal Fluminense, Niterói, Brasil
| | - Juliana da Silva Leite
- Departamento de Patologia e Clínica Veterinária, Universidade Federal Fluminense, Niterói, Brasil
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4
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Fuller P, Leung D, Chu S. Genetics and genomics of ovarian sex cord-stromal tumors. Clin Genet 2017; 91:285-291. [DOI: 10.1111/cge.12917] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Revised: 10/22/2016] [Accepted: 10/24/2016] [Indexed: 12/20/2022]
Affiliation(s)
- P.J. Fuller
- Centre for Endocrinology and Metabolism; Hudson Institute of Medical Research; Clayton Australia
- Department of Molecular and Translational Science; Monash University; Clayton Australia
| | - D. Leung
- Centre for Endocrinology and Metabolism; Hudson Institute of Medical Research; Clayton Australia
- Department of Molecular and Translational Science; Monash University; Clayton Australia
| | - S. Chu
- Centre for Endocrinology and Metabolism; Hudson Institute of Medical Research; Clayton Australia
- Department of Molecular and Translational Science; Monash University; Clayton Australia
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Chalanki MV, Dattatreya S, Padmaja P, Dayal M, Parakh M, Rao VVSP. Granulosa cell tumor induced massive recurrence of post hysterectomy leiomyoma. Indian J Nucl Med 2014; 29:179-81. [PMID: 25210289 PMCID: PMC4157197 DOI: 10.4103/0972-3919.136584] [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] [Indexed: 11/04/2022] Open
Abstract
The authors report a very unusual occurrence of a massive recurrence of leiomyoma from post hysterectomy stump diagnosed on fluorine-18 fluorodeoxyglucose positron emission tomography/computed tomography (F-18-FDG PET/CT). The case also has an additional complexity of granulosa cell tumor (GCT) of ovary probably contributing to the recurrence and massive size.
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Affiliation(s)
- Mohana Vamsy Chalanki
- Department of Surgical Oncology, Omega Hospitals, Banjara Hills, Hyderabad, Andhra Pradesh, India
| | - Satya Dattatreya
- Department of Medical Oncology, Omega Hospitals, Banjara Hills, Hyderabad, Andhra Pradesh, India
| | - Parvathaneni Padmaja
- Department of Surgical Oncology, Omega Hospitals, Banjara Hills, Hyderabad, Andhra Pradesh, India
| | - Monal Dayal
- Department of Pathology, Omega Hospitals, Banjara Hills, Hyderabad, Andhra Pradesh, India
| | - Megha Parakh
- Department of Radio Diagnosis, Omega Hospitals, Banjara Hills, Hyderabad, Andhra Pradesh, India
| | - Vatturi Venkata Satya Prabhakar Rao
- Department of Nuclear Medicine and Positron Emission Tomography Computerized Tomography, Omega Hospitals, Banjara Hills, Hyderabad, Andhra Pradesh, India
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Ud Din N, Kayani N. Recurrence of adult granulosa cell tumor of the ovary: experience at a tertiary care center. Ann Diagn Pathol 2014; 18:125-8. [DOI: 10.1016/j.anndiagpath.2014.02.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2014] [Accepted: 02/04/2014] [Indexed: 11/15/2022]
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Fu D, Lv X, Hua G, He C, Dong J, Lele SM, Li DWC, Zhai Q, Davis JS, Wang C. YAP regulates cell proliferation, migration, and steroidogenesis in adult granulosa cell tumors. Endocr Relat Cancer 2014; 21:297-310. [PMID: 24389730 PMCID: PMC4222524 DOI: 10.1530/erc-13-0339] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The Hippo signaling pathway has been implicated as a conserved regulator of organ size in both Drosophila and mammals. Yes-associated protein (YAP), the central component of the Hippo signaling cascade, functions as an oncogene in several malignancies. Ovarian granulosa cell tumors (GCT) are characterized by enlargement of the ovary, excess production of estrogen, a high frequency of recurrence, and the potential for malignancy and metastasis. Whether the Hippo pathway plays a role in the pathogenesis of GCT is unknown. This study was conducted to examine the expression of YAP in human adult GCTs and to determine the role of YAP in the proliferation and steroidogenesis of GCT cells. Compared with age-matched normal human ovaries, GCT tissues exhibited higher levels of YAP expression. YAP protein was predominantly expressed in the nucleus of tumor cells, whereas the non-tumor ovarian stromal cells expressed very low levels of YAP. YAP was also expressed in cultured primary human granulosa cells and in KGN and COV434 GCT cell lines. siRNA-mediated knockdown of YAP in KGN cells resulted in a significant reduction in cell proliferation (P<0.001). Conversely, overexpression of wild type YAP or a constitutively active YAP (YAP1) mutant resulted in a significant increase in KGN cell proliferation and migration. Moreover, YAP knockdown reduced FSH-induced aromatase (CYP19A1) protein expression and estrogen production in KGN cells. These results demonstrate that YAP plays an important role in the regulation of GCT cell proliferation, migration, and steroidogenesis. Targeting the Hippo/YAP pathway may provide a novel therapeutic approach for GCT.
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Affiliation(s)
- David Fu
- Olson Center for Women’s Health, University of Nebraska Medical Center, Omaha, NE 68198
- Department of Obstetrics and Gynecology, University of Nebraska Medical Center, Omaha, NE 68198
| | - Xiangmin Lv
- Olson Center for Women’s Health, University of Nebraska Medical Center, Omaha, NE 68198
- Department of Obstetrics and Gynecology, University of Nebraska Medical Center, Omaha, NE 68198
| | - Guohua Hua
- Olson Center for Women’s Health, University of Nebraska Medical Center, Omaha, NE 68198
- Department of Obstetrics and Gynecology, University of Nebraska Medical Center, Omaha, NE 68198
- College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, China
| | - Chunbo He
- Olson Center for Women’s Health, University of Nebraska Medical Center, Omaha, NE 68198
- Department of Obstetrics and Gynecology, University of Nebraska Medical Center, Omaha, NE 68198
| | - Jixin Dong
- The Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, NE 68198
| | - Subodh M. Lele
- Department of Pathology, University of Nebraska Medical Center, Omaha, NE 68198
| | - David Wan-Cheng Li
- Department of Ophthalmology and visual Science, University of Nebraska Medical Center, Omaha, NE 68198
| | - Qiongli Zhai
- Department of Pathology, Tianjin Medical University Cancer Hospital, Tianjin, China
| | - John S. Davis
- Olson Center for Women’s Health, University of Nebraska Medical Center, Omaha, NE 68198
- Department of Obstetrics and Gynecology, University of Nebraska Medical Center, Omaha, NE 68198
- The Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, NE 68198
- Omaha Veterans Affairs Medical Center, Omaha NE 68105
| | - Cheng Wang
- Olson Center for Women’s Health, University of Nebraska Medical Center, Omaha, NE 68198
- Department of Obstetrics and Gynecology, University of Nebraska Medical Center, Omaha, NE 68198
- The Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, NE 68198
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Färkkilä A, Andersson N, Bützow R, Leminen A, Heikinheimo M, Anttonen M, Unkila-Kallio L. HER2 and GATA4 are new prognostic factors for early-stage ovarian granulosa cell tumor-a long-term follow-up study. Cancer Med 2014; 3:526-36. [PMID: 24687970 PMCID: PMC4101743 DOI: 10.1002/cam4.230] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2013] [Revised: 02/10/2014] [Accepted: 02/14/2014] [Indexed: 12/11/2022] Open
Abstract
Granulosa cell tumors (GCTs) carry a risk of recurrence also at an early stage, but reliable prognostic factors are lacking. We assessed clinicopathological prognostic factors and the prognostic roles of the human epidermal growth factor receptors (HER 2–4) and the transcription factor GATA4 in GCTs. We conducted a long-term follow-up study of 80 GCT patients with a mean follow-up time of 16.8 years. A tumor-tissue microarray was immunohistochemically stained for HER2–4 and GATA4. Expression of HER2–4 mRNA was studied by means of real time polymerase chain reaction and HER2 gene amplification was analyzed by means of silver in situ hybridization. The results were correlated to clinical data on recurrences and survival. We found that GCTs have an indolent prognosis, with 5-year disease-specific survival (DSS) being 97.5%. Tumor recurrence was detected in 24% of the patients at a median of 7.0 years (range 2.6–18 years) after diagnosis. Tumor stage was not prognostic of disease-free survival (DFS). Of the molecular prognostic factors, high-level expression of HER2, and GATA4, and high nuclear atypia were prognostic of shorter DFS. In multivariate analyses, high-level coexpression of HER2 and GATA4 independently predicted DFS (hazard ratio [HR] 8.75, 95% CI 2.20–39.48, P = 0.002). High-level expression of GATA4 also predicted shorter DSS (HR 3.96, 95% CI 1.45–12.57, P = 0.006). In multivariate analyses, however, tumor stage (II–III) and nuclear atypia were independent prognostic factors of DSS. In conclusion HER2 and GATA4 are new molecular prognostic markers of GCT recurrence, which could be utilized to optimize the management and follow-up of patients with early-stage GCTs.
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Affiliation(s)
- Anniina Färkkilä
- Department of Obstetrics and Gynecology, University of Helsinki and Helsinki University Central Hospital, Helsinki, Finland; Children's Hospital, University of Helsinki and Helsinki University Central Hospital, Helsinki, Finland
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9
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Abstract
Granulosa cell tumor (GCT) of the ovary is a rare tumor accounting for 2%-5% of ovarian malignancies. Although the usefulness of 18F-FDG PET/CT is well demonstrated in the staging and follow-up of the great majority of ovarian cancers, GCTs are known to cause false-negative results on FDG PET because of very low FDG avidity. We present a case of a GCT in which an 18F-FDG PET/CT proved very useful in the detection of recurrence.
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Wang C, Lv X, Jiang C, Cordes CM, Fu L, Lele SM, Davis JS. Transforming growth factor alpha (TGFα) regulates granulosa cell tumor (GCT) cell proliferation and migration through activation of multiple pathways. PLoS One 2012; 7:e48299. [PMID: 23155381 PMCID: PMC3498304 DOI: 10.1371/journal.pone.0048299] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2012] [Accepted: 09/28/2012] [Indexed: 12/18/2022] Open
Abstract
Granulosa cell tumors (GCTs) are the most common ovarian estrogen producing tumors, leading to symptoms of excessive estrogen such as endometrial hyperplasia and endometrial adenocarcinoma. These tumors have malignant potential and often recur. The etiology of GCT is unknown. TGFα is a potent mitogen for many different cells. However, its function in GCT initiation, progression and metastasis has not been determined. The present study aims to determine whether TGFα plays a role in the growth of GCT cells. KGN cells, which are derived from an invasive GCT and have many features of normal granulosa cells, were used as the cellular model. Immunohistochemistry, Western blot and RT-PCR results showed that the ErbB family of receptors is expressed in human GCT tissues and GCT cell lines. RT-PCR results also indicated that TGFα and EGF are expressed in the human granulosa cells and the GCT cell lines, suggesting that TGFα might regulate GCT cell function in an autocrine/paracrine manner. TGFα stimulated KGN cell DNA synthesis, cell proliferation, cell viability, cell cycle progression, and cell migration. TGFα rapidly activated EGFR/PI3K/Akt and mTOR pathways, as indicated by rapid phosphorylation of Akt, TSC2, Rictor, mTOR, P70S6K and S6 proteins following TGFα treatment. TGFα also rapidly activated the EGFR/MEK/ERK pathway, and P38 MAPK pathways, as indicated by the rapid phosphorylation of EGFR, MEK, ERK1/2, P38, and CREB after TGFα treatment. Whereas TGFα triggered a transient activation of Akt, it induced a sustained activation of ERK1/2 in KGN cells. Long-term treatment of KGN cells with TGFα resulted in a significant increase in cyclin D2 and a decrease in p27/Kip1, two critical regulators of granulosa cell proliferation and granulosa cell tumorigenesis. In conclusion, TGFα, via multiple signaling pathways, regulates KGN cell proliferation and migration and may play an important role in the growth and metastasis of GCTs.
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Affiliation(s)
- Cheng Wang
- Departments of Obstetrics and Gynecology, Olson Center for Women's Health, College of Medicine, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
- * E-mail: (CW); (JSD)
| | - Xiangmin Lv
- Departments of Obstetrics and Gynecology, Olson Center for Women's Health, College of Medicine, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
- Key Laboratory of Protein Chemistry and Developmental Biology of Education Ministry of China, College of Life Sciences, Hunan Normal University, Changsha, Hunan, China
| | - Chao Jiang
- Departments of Obstetrics and Gynecology, Olson Center for Women's Health, College of Medicine, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
| | - Crystal M. Cordes
- Departments of Obstetrics and Gynecology, Olson Center for Women's Health, College of Medicine, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
| | - Lan Fu
- Departments of Obstetrics and Gynecology, Olson Center for Women's Health, College of Medicine, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
| | - Subodh M. Lele
- Department of Pathology and Microbiology, College of Medicine, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
| | - John S. Davis
- Departments of Obstetrics and Gynecology, Olson Center for Women's Health, College of Medicine, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
- Department of Biochemistry and Molecular Biology, College of Medicine, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
- VA Medical Center, Omaha, Nebraska, United States of America
- * E-mail: (CW); (JSD)
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Rico C, Laguë MN, Lefèvre P, Tsoi M, Dodelet-Devillers A, Kumar V, Lapointe E, Paquet M, Nadeau MÈ, Boerboom D. Pharmacological targeting of mammalian target of rapamycin inhibits ovarian granulosa cell tumor growth. Carcinogenesis 2012; 33:2283-92. [PMID: 22871496 DOI: 10.1093/carcin/bgs263] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Few targeted therapies have been developed for ovarian granulosa cell tumor (GCT), even though it represents 5% of all malignant ovarian tumors in women. As misregulation of PI3K/AKT signaling has been implicated in GCT development, we hypothesized that the AKT signaling effector mammalian target of rapamycin (mTOR) may play a role in the pathogenesis of GCT and could represent a therapeutic target. Analyses of human GCT samples showed an increase in protein levels of mTOR and its downstream effectors RPS6KB1, RPS6, eIF4B and PPARG relative to normal granulosa cells, suggestive of an increase in mTOR pathway activity and increased translational activity and/or protein stability. We next sought to evaluate mTOR as a GCT therapeutic target using the Pten (tm1Hwu/tmiHwu);Ctnnb1 (tm1Mmt/+);Amhr2 (tm3(cre)Bhr/+) (PCA) mouse model, in which mTOR, RPS6KB1, eIF4B and PPARG are upregulated in tumor cells in a manner similar to human GCT. Treatment of PCA mice with the mTOR-specific inhibitor everolimus reduced tumor growth rate (1.5-fold; P < 0.05) and also reduced total tumor burden (4.7-fold; P < 0.05) and increased survival rate (78 versus 44% in the vehicle group) in a PCA surgical model of GCT peritoneal carcinomatosis. Everolimus decreased tumor cell proliferation and tumor cell volume relative to controls (P < 0.05), whereas apoptosis was unaffected. Phosphorylation of RPS6KB1 and RPS6 were decreased (P < 0.05) by everolimus, but RPS6KB1, RPS6, eIF4B and PPARG expressions were not affected. These results suggest that mTOR is a valid and clinically useful pharmacological target for the treatment of GCT, although its inhibition does not reverse all consequences of aberrant PI3K/AKT signaling in the PCA model.
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Affiliation(s)
- Charlène Rico
- Centre de Recherche en Reproduction animale, Université de Montréal, St-Hyacinthe, Québec J2S 7C6, Canada
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Comparison of Proliferation Indices in Primary Adult-type Granulosa Cell Tumors of the Ovary and Their Corresponding Metastases: An Analysis of 14 Cases. Int J Gynecol Pathol 2009; 28:423-31. [DOI: 10.1097/pgp.0b013e31819d8153] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Imai M, Muraki M, Takamatsu K, Saito H, Seiki M, Takahashi Y. Spontaneous transformation of human granulosa cell tumours into an aggressive phenotype: a metastasis model cell line. BMC Cancer 2008; 8:319. [PMID: 18980698 PMCID: PMC2584659 DOI: 10.1186/1471-2407-8-319] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2007] [Accepted: 11/04/2008] [Indexed: 12/20/2022] Open
Abstract
Background Granulosa cell tumours (GCTs) are frequently seen in menopausal women and are relatively indolent. Although the physiological properties of normal granulosa cells have been studied extensively, little is known about the molecular mechanism of GCT progression. Here, we characterise the unique behavioural properties of a granulosa tumour cell line, KGN cells, for the molecular analysis of GCT progression. Methods Population doubling was carried out to examine the proliferation capacity of KGN cells. Moreover, the invasive capacity of these cells was determined using the in vitro invasion assay. The expression level of tumour markers in KGN cells at different passages was then determined by Western blot analysis. Finally, the growth and metastasis of KGN cells injected subcutaneously (s.c.) into nude mice was observed 3 months after injection. Results During in vitro culture, the advanced passage KGN cells grew 2-fold faster than the early passage cells, as determined by the population doubling assay. Moreover, we found that the advanced passage cells were 2-fold more invasive than the early passage cells. The expression pattern of tumour markers, such as p53, osteopontin, BAX and BAG-1, supported the notion that with passage, KGN cells became more aggressive. Strikingly, KGN cells at both early and advanced passages metastasized to the bowel when injected s.c. into nude mice. In addition, more tumour nodules were formed when the advanced passage cells were implanted. Conclusion KGN cells cultured in vitro acquire an aggressive phenotype, which was confirmed by the analysis of cellular activities and the expression of biomarkers. Interestingly, KGN cells injected s.c. are metastatic with nodule formation occurring mostly in the bowel. Thus, this cell line is a good model for analysing GCT progression and the mechanism of metastasis in vivo.
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Affiliation(s)
- Misa Imai
- Division of Reproductive Medicine, Department of Perinatal Medicine and Maternal Care, National Center for Child Health and Development, Tokyo 157-8535, Japan.
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Laguë MN, Paquet M, Fan HY, Kaartinen MJ, Chu S, Jamin SP, Behringer RR, Fuller PJ, Mitchell A, Doré M, Huneault LM, Richards JS, Boerboom D. Synergistic effects of Pten loss and WNT/CTNNB1 signaling pathway activation in ovarian granulosa cell tumor development and progression. Carcinogenesis 2008; 29:2062-72. [PMID: 18687666 DOI: 10.1093/carcin/bgn186] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
The mechanisms of granulosa cell tumor (GCT) development may involve the dysregulation of signaling pathways downstream of follicle-stimulating hormone, including the phosphoinosite-3 kinase (PI3K)/AKT pathway. To test this hypothesis, a genetically engineered mouse model was created to derepress the PI3K/AKT pathway in granulosa cells by conditional targeting of the PI3K antagonist gene Pten (Pten(flox/flox);Amhr2(cre/+)). The majority of Pten(flox/flox);Amhr2(cre/+) mice featured no ovarian anomalies, but occasionally ( approximately 7%) developed aggressive, anaplastic GCT with pulmonary metastases. The expression of the PI3K/AKT downstream effector FOXO1 was abrogated in Pten(flox/flox);Amhr2(cre/+) GCT, indicating a mechanism by which GCT cells may increase proliferation and evade apoptosis. To relate these findings to spontaneously occurring GCT, analyses of PTEN and phospho-AKT expression were performed on human and equine tumors. Although PTEN loss was not detected, many GCT (2/5 human, 7/17 equine) featured abnormal nuclear or perinuclear localization of phospho-AKT, suggestive of altered PI3K/AKT activity. As inappropriate activation of WNT/CTNNB1 signaling causes late-onset GCT development and cross talk between the PI3K/AKT and WNT/CTNNB1 pathways has been reported, we tested whether these pathways could synergize in GCT. Activation of both the PI3K/AKT and WNT/CTNNB1 pathways in the granulosa cells of a mouse model (Pten(flox/flox);Ctnnb1(flox(ex3)/+);Amhr2(cre/+)) resulted in the development of GCT similar to those observed in Pten(flox/flox);Amhr2(cre/+) mice, but with 100% penetrance, perinatal onset, extremely rapid growth and the ability to spread by seeding into the abdominal cavity. These data indicate a synergistic effect of dysregulated PI3K/AKT and WNT/CTNNB1 signaling in the development and progression of GCT and provide the first animal models for metastatic GCT.
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Affiliation(s)
- Marie-Noëlle Laguë
- Centre de Recherche en Reproduction Animale, Faculté de Médecine Vétérinaire, Université de Montréal, Saint-Hyacinthe, Québec J2S 7C6, Canada
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Wilkinson N, Osborn S, Young RH. Sex cord-stromal tumours of the ovary: a review highlighting recent advances. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.mpdhp.2008.06.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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