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Pishas KI, Cowley KJ, Llaurado-Fernandez M, Kim H, Luu J, Vary R, Bowden NA, Campbell IG, Carey MS, Simpson KJ, Cheasley D. High-throughput drug screening identifies novel therapeutics for Low Grade Serous Ovarian Carcinoma. Sci Data 2024; 11:1024. [PMID: 39300112 DOI: 10.1038/s41597-024-03869-x] [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: 03/18/2024] [Accepted: 09/06/2024] [Indexed: 09/22/2024] Open
Abstract
Low grade serous carcinoma (LGSOC) is a rare epithelial ovarian cancer with unique molecular characteristics compared to the more common tubo-ovarian high-grade serous ovarian carcinoma. Pivotal clinical trials guiding the management of epithelial ovarian cancer lack sufficient cases of LGSOC for meaningful subgroup analysis, hence overall findings cannot be extrapolated to rarer chemo-resistant subtypes such as LGSOC. Furthermore, there is a need for more effective therapies for the treatment of relapsed disease, as treatment options are limited. To address this, we conducted the largest quantitative high-throughput drug screening effort (n = 3436 compounds) in 12 patient-derived LGSOC cell lines and one normal ovary cell line to identify unexplored therapeutic avenues. Using a combination of high-throughput robotics, high-content imaging and novel data analysis pipelines, our data set identified 60 high and 19 moderate confidence hits which induced cancer cell specific cytotoxicity at the lowest compound dose assessed (0.1 µM). We also revealed a series of known (mTOR/PI3K/AKT) and novel (EGFR and MDM2-p53) drug classes in which LGSOC cell lines showed demonstrable susceptibility to.
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Affiliation(s)
- Kathleen I Pishas
- Peter MacCallum Cancer Centre, Melbourne, Victoria, 3000, Australia
- The Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, Victoria, 3010, Australia
| | - Karla J Cowley
- Victorian Centre for Functional Genomics, Peter MacCallum Cancer Centre, Melbourne, Victoria, 3000, Australia
| | - Marta Llaurado-Fernandez
- Division of Gynecology Oncology, Department of Obstetrics and Gynecology, University of British Columbia, Vancouver, British Columbia, V5Z 1M9, Canada
- Department of Clinical Research, BC Cancer, Vancouver, British Columbia, V5Z 4E6, Canada
| | - Hannah Kim
- Division of Gynecology Oncology, Department of Obstetrics and Gynecology, University of British Columbia, Vancouver, British Columbia, V5Z 1M9, Canada
- Department of Clinical Research, BC Cancer, Vancouver, British Columbia, V5Z 4E6, Canada
| | - Jennii Luu
- Victorian Centre for Functional Genomics, Peter MacCallum Cancer Centre, Melbourne, Victoria, 3000, Australia
| | - Robert Vary
- Victorian Centre for Functional Genomics, Peter MacCallum Cancer Centre, Melbourne, Victoria, 3000, Australia
| | - Nikola A Bowden
- School of Medicine and Public Health, University of Newcastle, Callaghan, New South Wales, Australia
- Drug Repurposing and Medicines Research Program, Hunter Medical Research Institute, New Lambton, New South Wales, 2305, Australia
| | - Ian G Campbell
- Peter MacCallum Cancer Centre, Melbourne, Victoria, 3000, Australia
- The Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, Victoria, 3010, Australia
| | - Mark S Carey
- Division of Gynecology Oncology, Department of Obstetrics and Gynecology, University of British Columbia, Vancouver, British Columbia, V5Z 1M9, Canada
- Department of Clinical Research, BC Cancer, Vancouver, British Columbia, V5Z 4E6, Canada
| | - Kaylene J Simpson
- The Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, Victoria, 3010, Australia.
- Victorian Centre for Functional Genomics, Peter MacCallum Cancer Centre, Melbourne, Victoria, 3000, Australia.
- Department of Biochemistry and Pharmacology, The University of Melbourne, Parkville, Victoria, 3010, Australia.
| | - Dane Cheasley
- Peter MacCallum Cancer Centre, Melbourne, Victoria, 3000, Australia
- The Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, Victoria, 3010, Australia
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Crowley F, Broderick S, Francis JH, O'Cearbhaill RE, Canestraro J. Ocular side effects of anticancer agents used in the treatment of gynecologic cancers. Gynecol Oncol 2024; 188:147-157. [PMID: 38964252 DOI: 10.1016/j.ygyno.2024.06.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2024] [Revised: 05/31/2024] [Accepted: 06/02/2024] [Indexed: 07/06/2024]
Abstract
The treatment landscape of gynecologic cancers has expanded in recent years to include targeted and immune-based therapies. These therapies often have ocular side effects not seen with conventional chemotherapies, some of which can cause significant visual impairment if not recognized in a timely fashion. Clinicians must know how to appropriately identify, mitigate, and treat these ocular adverse events. Management often involves working with an interdisciplinary team of eye specialists, and it is important to know when to refer patients for specialized care. Proactive identification of eye specialists, especially in rural and community settings where access to care can be limited, may be necessary. Here, we discuss the management of common ocular toxicities seen with novel anticancer agents used to treat gynecologic cancers.
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Affiliation(s)
- Fionnuala Crowley
- Department of Hematology Oncology, Icahn School of Medicine at Mount Sinai, New York, USA; Department of Geriatrics and Palliative Care, Icahn School of Medicine at Mount Sinai, New York, USA
| | | | - Jasmine H Francis
- Ophthalmic Oncology Service, Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, USA; Department of Ophthalmology, Weill Cornell Medical College, New York, USA
| | - Roisin E O'Cearbhaill
- Gynecologic Medical Oncology, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, USA; Department of Medicine, Weill Cornell Medical College, New York, USA.
| | - Julia Canestraro
- Department of Hematology Oncology, Icahn School of Medicine at Mount Sinai, New York, USA; Ophthalmic Oncology Service, Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, USA.
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3
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Barakzai SK, Bregar AJ, Del Carmen MG, Eisenhauer EL, Goodman A, Rauh-Hain JA, Gockley AA, Melamed A. The association of maintenance hormone therapy with overall survival in advanced-stage low-grade serous ovarian carcinoma: A risk-set matched retrospective study. Gynecol Oncol 2024; 190:119-123. [PMID: 39178527 DOI: 10.1016/j.ygyno.2024.08.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2024] [Revised: 07/23/2024] [Accepted: 08/04/2024] [Indexed: 08/26/2024]
Abstract
OBJECTIVE We conducted a multi-institutional observational study to investigate whether maintenance hormone therapy following primary treatment of low-grade advanced-stage ovarian cancer (LGSOC) is associated with an overall survival advantage. METHODS We included patients with histologically confirmed stage III or IV LGSOC diagnosed between Jan 1, 2004, and Dec 31, 2019, treated in Commission on Cancer-accredited cancer programs in the US. Patients who received hormone therapy within six months of diagnosis were matched to controls who did not initiate hormone therapy during this timeframe by risk-set propensity score matching. The primary outcome was the risk of death from any cause within five years of initiation of HT or observation. RESULTS There were 296 patients who initiated maintenance hormone therapy within six months of diagnosis and 2805 potential controls. Patients who received hormone therapy were more often treated in academic medical centers (55% vs. 44%), diagnosed later in the study period (62% vs. 23% diagnosed in 2018-2019), and frequently received no chemotherapy during initial treatment (45% vs. 17%). After risk set propensity score matching, we identified 225 patients treated with HT and 225 untreated controls who were otherwise similar with respect to measured covariates. In the matched cohort, hormone therapy was associated with a reduction in the risk of death (hazard ratio 0.60; 95% CI 0.38-0.94), corresponding to a 60-month survival of 75% compared with 65%. CONCLUSIONS Following primary management of LGSOC, maintenance hormone therapy was associated with improved overall survival compared with observation.
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Affiliation(s)
- Syem K Barakzai
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, Massachusetts General Hospital, Boston, MA, United States of America
| | - Amy J Bregar
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, Massachusetts General Hospital, Boston, MA, United States of America
| | - Marcela G Del Carmen
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, Massachusetts General Hospital, Boston, MA, United States of America
| | - Eric L Eisenhauer
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, Massachusetts General Hospital, Boston, MA, United States of America
| | - Annekathryn Goodman
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, Massachusetts General Hospital, Boston, MA, United States of America
| | - Jose A Rauh-Hain
- Department of Gynecologic Oncology and Reproductive Medicine, MD Anderson Cancer Center, Houston, TX, United States of America
| | - Allison A Gockley
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, Massachusetts General Hospital, Boston, MA, United States of America
| | - Alexander Melamed
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, Massachusetts General Hospital, Boston, MA, United States of America.
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4
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Hollis RL, Elliott R, Dawson JC, Ilenkovan N, Matthews RM, Stillie LJ, Oswald AJ, Kim H, Llaurado Fernandez M, Churchman M, Porter JM, Roxburgh P, Unciti-Broceta A, Gershenson DM, Herrington CS, Carey MS, Carragher NO, Gourley C. High throughput screening identifies dasatinib as synergistic with trametinib in low grade serous ovarian carcinoma. Gynecol Oncol 2024; 186:42-52. [PMID: 38582027 DOI: 10.1016/j.ygyno.2024.03.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Revised: 03/26/2024] [Accepted: 03/31/2024] [Indexed: 04/08/2024]
Abstract
BACKGROUND Low grade serous ovarian carcinoma (LGSOC) is a distinct histotype of ovarian cancer characterised high levels of intrinsic chemoresistance, highlighting the urgent need for new treatments. High throughput screening in clinically-informative cell-based models represents an attractive strategy for identifying candidate treatment options for prioritisation in clinical studies. METHODS We performed a high throughput drug screen of 1610 agents across a panel of 6 LGSOC cell lines (3 RAS/RAF-mutant, 3 RAS/RAF-wildtype) to identify novel candidate therapeutic approaches. Validation comprised dose-response analysis across 9 LGSOC models and 5 high grade serous comparator lines. RESULTS 16 hits of 1610 screened compounds were prioritised for validation based on >50% reduction in nuclei counts in over half of screened cell lines at 1000 nM concentration. 11 compounds passed validation, and the four agents of greatest interest (dasatinib, tyrosine kinase inhibitor; disulfiram, aldehyde dehydrogenase inhibitor; carfilzomib, proteasome inhibitor; romidepsin, histone deacetylase inhibitor) underwent synergy profiling with the recently approved MEK inhibitor trametinib. Disulfiram demonstrated excellent selectivity for LGSOC versus high grade serous ovarian carcinoma comparator lines (P = 0.003 for IC50 comparison), while the tyrosine kinase inhibitor dasatinib demonstrated favourable synergy with trametinib across multiple LGSOC models (maximum zero interaction potency synergy score 46.9). The novel, highly selective Src family kinase (SFK) inhibitor NXP900 demonstrated a similar trametinib synergy profile to dasatinib, suggesting that SFK inhibition is the likely driver of synergy. CONCLUSION Dasatinib and other SFK inhibitors represent novel candidate treatments for LGSOC and demonstrate synergy with trametinib. Disulfiram represents an additional treatment strategy worthy of investigation.
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Affiliation(s)
- Robert L Hollis
- The Nicola Murray Centre for Ovarian Cancer Research, Cancer Research UK Scotland Centre, University of Edinburgh, Edinburgh, UK.
| | - Richard Elliott
- Edinburgh Cancer Research, Cancer Research UK Scotland Centre, University of Edinburgh, Edinburgh, UK
| | - John C Dawson
- Edinburgh Cancer Research, Cancer Research UK Scotland Centre, University of Edinburgh, Edinburgh, UK
| | - Narthana Ilenkovan
- The Nicola Murray Centre for Ovarian Cancer Research, Cancer Research UK Scotland Centre, University of Edinburgh, Edinburgh, UK; Cancer Research UK Scotland Institute, Glasgow, UK
| | - Rosie M Matthews
- The Nicola Murray Centre for Ovarian Cancer Research, Cancer Research UK Scotland Centre, University of Edinburgh, Edinburgh, UK
| | - Lorna J Stillie
- The Nicola Murray Centre for Ovarian Cancer Research, Cancer Research UK Scotland Centre, University of Edinburgh, Edinburgh, UK; Cancer Research UK Scotland Institute, Glasgow, UK
| | - Ailsa J Oswald
- The Nicola Murray Centre for Ovarian Cancer Research, Cancer Research UK Scotland Centre, University of Edinburgh, Edinburgh, UK
| | - Hannah Kim
- Department of Obstetrics and Gynecology, University of British Columbia, Vancouver, BC, Canada
| | | | - Michael Churchman
- The Nicola Murray Centre for Ovarian Cancer Research, Cancer Research UK Scotland Centre, University of Edinburgh, Edinburgh, UK
| | - Joanna M Porter
- The Nicola Murray Centre for Ovarian Cancer Research, Cancer Research UK Scotland Centre, University of Edinburgh, Edinburgh, UK
| | - Patricia Roxburgh
- Cancer Research UK Scotland Institute, Glasgow, UK; CRUK Scotland Centre, School of Cancer Sciences, Glasgow, UK
| | - Asier Unciti-Broceta
- Edinburgh Cancer Research, Cancer Research UK Scotland Centre, University of Edinburgh, Edinburgh, UK
| | - David M Gershenson
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - C Simon Herrington
- The Nicola Murray Centre for Ovarian Cancer Research, Cancer Research UK Scotland Centre, University of Edinburgh, Edinburgh, UK
| | - Mark S Carey
- Department of Obstetrics and Gynecology, University of British Columbia, Vancouver, BC, Canada
| | - Neil O Carragher
- Edinburgh Cancer Research, Cancer Research UK Scotland Centre, University of Edinburgh, Edinburgh, UK
| | - Charlie Gourley
- The Nicola Murray Centre for Ovarian Cancer Research, Cancer Research UK Scotland Centre, University of Edinburgh, Edinburgh, UK
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5
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Badlaeva A, Tregubova A, Palicelli A, Asaturova A. Eosinophilic Cells in Ovarian Borderline Serous Tumors as a Predictor of BRAF Mutation. Cancers (Basel) 2024; 16:2322. [PMID: 39001384 PMCID: PMC11240704 DOI: 10.3390/cancers16132322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2024] [Revised: 06/10/2024] [Accepted: 06/18/2024] [Indexed: 07/16/2024] Open
Abstract
According to recent reports, ovarian serous borderline tumor (SBT) harboring the BRAF V600E mutation is associated with a lower risk of progression to low-grade serous carcinoma. Preliminary observations suggest that there may be an association between eosinophilic cells (ECs) and the above-mentioned mutation, so this study aimed to evaluate interobserver reproducibility for assessing ECs. Forty-two samples of SBTs were analyzed for ECs with abundant eosinophilic cytoplasm. Immunohistochemical staining and genetic pro-filing were performed in all cases to verify the BRAF V600E mutation. A BRAF V600E mutation was found in 19 of 42 (45%) cases. Inter-observer reproducibility in the assessment of ECs was substantial (κ = 0.7). The sensitivity and specificity for predicting the mutation were 79% and 91%, respectively. Patients with BRAF-mutated SBTs were significantly younger than those without mutation (p = 0.005). SBTs with BRAF mutation were less likely to be accompanied by non-invasive implants than wild-type SBT: 12% (2/17) versus 33% (6/18). Seven cases were excluded due to incomplete cytoreductive surgery. Nevertheless, Fisher's exact test showed no significant differences between the two groups (p = 0.228). Overall, this study strengthens the idea that ECs in ovarian SBTs may represent a mutation with prognostic significance, which can serve as a primary screening test for BRAF V600E mutation in this pathologic entity.
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Affiliation(s)
- Alina Badlaeva
- National Medical Research Center for Obstetrics, Gynecology and Perinatology Named after Academician V.I. Kulakov of the Ministry of Health of Russia, Bldg. 4, Oparina Street, 117513 Moscow, Russia; (A.B.); (A.T.)
| | - Anna Tregubova
- National Medical Research Center for Obstetrics, Gynecology and Perinatology Named after Academician V.I. Kulakov of the Ministry of Health of Russia, Bldg. 4, Oparina Street, 117513 Moscow, Russia; (A.B.); (A.T.)
| | - Andrea Palicelli
- Pathology Unit, Azienda Unità Sanitaria Locale—IRCCS di Reggio Emilia, 42123 Reggio Emilia, Italy;
| | - Aleksandra Asaturova
- National Medical Research Center for Obstetrics, Gynecology and Perinatology Named after Academician V.I. Kulakov of the Ministry of Health of Russia, Bldg. 4, Oparina Street, 117513 Moscow, Russia; (A.B.); (A.T.)
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6
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Da-Anoy A, Kang EY, Lee CH, Cheasley D, Llaurado Fernandez M, Carey MS, Cameron A, Köbel M. Molecular Surrogate Subtypes of Ovarian and Peritoneal Low-grade Serous Carcinoma. Int J Gynecol Pathol 2024:00004347-990000000-00168. [PMID: 38914014 DOI: 10.1097/pgp.0000000000001043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/26/2024]
Abstract
Low-grade serous carcinoma (LGSC) is an uncommon histotype of ovarian carcinoma, accounting for ~3% of cases. There is evidence that survival of peritoneal LGSC (pLGSC) is longer than that of ovarian LGSC (oLGSC). Key molecular alterations of LGSC have been established, including loss of CDKN2A and PR expression, MAPK pathway alterations, and loss of USP9X expression. We hypothesized that LGSC could be subclassified into clinically applicable molecular subtypes by a few surrogate tests similar to endometrioid carcinomas using a hierarchical decision tree based on the strength of the prognostic associations of the individual alterations. Our study included 71 LGSCs. Immunohistochemistry for CDKN2A, ER, PR, NF1, and USP9X and sequencing for KRAS, NRAS, and BRAF were performed. Our data showed the co-occurrence of key molecular alterations, and despite suggestive trends, hierarchical molecular subtyping did not provide significantly different stratification of patients according to survival in this cohort. We confirmed that patients diagnosed with pLGSC have a longer survival than high-stage oLGSC, with the intriguing observation that normal CDKN2A and PR status were associated with excellent survival in pLGSC. Therefore, CDKN2A and PR status might aid in the classification of indeterminate implants, where abnormal findings favor pLGSC over noninvasive implants. Molecular subtypes should be further evaluated in larger cohorts for their prognostic and potentially predictive value.
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Affiliation(s)
- Annalyn Da-Anoy
- Department of Pathology and Laboratory Medicine, University of Calgary, Calgary
| | - Eun Young Kang
- Department of Pathology and Laboratory Medicine, University of Calgary, Calgary
| | - Cheng Han Lee
- Department of Pathology and Laboratory Medicine, University of Alberta, Edmonton, Alberta
| | - Dane Cheasley
- Cancer Genetics Laboratory, Peter MacCallum Cancer Centre, Melbourne
- Sir Peter MacCallum Department of Oncology, University of Melbourne, VIC, Australia
| | - Marta Llaurado Fernandez
- Department of Obstetrics & Gynecology, Faculty of Medicine, University of British Columbia, and the Department of Clinical Research, BC Cancer, Vancouver, BC
| | - Mark S Carey
- Department of Obstetrics & Gynecology, Faculty of Medicine, University of British Columbia, and the Department of Clinical Research, BC Cancer, Vancouver, BC
| | - Anna Cameron
- Department of Obstetrics & Gynecology, Faculty of Medicine, University of British Columbia, and the Department of Clinical Research, BC Cancer, Vancouver, BC
| | - Martin Köbel
- Department of Pathology and Laboratory Medicine, University of Calgary, Calgary
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Sama S, Rosqvist S, Savage T, Lomo L, Sibbald K, Straubhar A, Werner TL. Durable response to BRAF inhibitor monotherapy in recurrent metastatic low grade serous ovarian cancer. Gynecol Oncol Rep 2024; 53:101412. [PMID: 38779189 PMCID: PMC11109349 DOI: 10.1016/j.gore.2024.101412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Revised: 05/05/2024] [Accepted: 05/06/2024] [Indexed: 05/25/2024] Open
Abstract
Low grade serous ovarian cancers (LGSOC) in an advanced setting have limited systemic treatment options. In this paper we report a case of metastatic LGSOC harboring a BRAF mutation, treated with dabrafenib. We discuss the clinical, pathologic and molecular characteristics as well as surgical considerations and ongoing investigations in LGSOC.
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Affiliation(s)
- Shashank Sama
- Huntsman Cancer Institute at the University of Utah, Salt Lake City, UT, USA
| | | | - Talicia Savage
- Huntsman Cancer Institute at the University of Utah, Salt Lake City, UT, USA
| | - Lesley Lomo
- Huntsman Cancer Institute at the University of Utah, Salt Lake City, UT, USA
| | | | | | - Theresa L. Werner
- Huntsman Cancer Institute at the University of Utah, Salt Lake City, UT, USA
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Giannecchini GV, da Silva JL, de Oliveira Bretas G, Dos Santos ALS, Baltar LFR, de Melo AC. Exploring novel approaches in the systemic therapy of low-grade serous carcinoma of the ovary: a literature review. Front Med (Lausanne) 2024; 11:1366603. [PMID: 38835797 PMCID: PMC11148250 DOI: 10.3389/fmed.2024.1366603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2024] [Accepted: 04/26/2024] [Indexed: 06/06/2024] Open
Abstract
By presenting a comprehensive analysis of low-grade serous carcinomas (LGSCs), a subset of epithelial ovarian cancers, this review delves into their distinct molecular characteristics, clinicopathological features and systemic therapy options, emphasizing their differences from high-grade serous carcinomas (HGSCs). Notably, LGSCs exhibit prevalent RAS/RAF/MEK/MAPK pathway activation, KRAS and BRAF mutations, and infrequent p53 mutations. While chemotherapy is commonly employed, LGSCs display lower responsiveness compared to HGSCs. Hormone therapy, particularly endocrine maintenance therapy, is explored due to the higher estrogen receptor expression. Novel therapeutic approaches involving CDK4/6 inhibitors, MEK inhibitors, and antiangiogenic agents like bevacizumab are also investigated. Ongoing clinical trials are striving to enhance LGSC treatment strategies, offering valuable insights for future therapeutic advancements in this challenging ovarian cancer subtype.
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Affiliation(s)
| | - Jessé Lopes da Silva
- Oncoclínicas&Co - Medica Scientia Innovation Research (MEDSIR), Sao Paulo, Brazil
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9
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Wang Q, Cao SH, Li YY, Zhang JB, Yang XH, Zhang B. Advances in precision therapy of low-grade serous ovarian cancer: A review. Medicine (Baltimore) 2024; 103:e34306. [PMID: 38669365 PMCID: PMC11049748 DOI: 10.1097/md.0000000000034306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Accepted: 06/19/2023] [Indexed: 04/28/2024] Open
Abstract
Low-grade serous ovarian carcinoma (LGSOC) is a rare subtype of ovarian cancer that accounts for approximately 6% to 10% of serous ovarian cancers. The clinical treatment of LGSOC is similar to that of high-grade serous ovarian carcinoma, however, its clinical and molecular characteristics are different from those of high-grade serous ovarian carcinoma. This article reviews the research on gene diagnosis, surgical treatment, chemotherapy, and biological therapy of LGSOC, providing reference for clinical diagnosis and treatment of LGSOC. Surgery is the cornerstone of LGSOC treatment and maximum effort must be made to achieve R0 removal. Although LGSOC is not sensitive to chemotherapy, postoperative platinum-based combination chemotherapy remains the first-line treatment option for LGSOC. Additional clinical trials are needed to confirm the clinical benefits of chemotherapy and explore new chemotherapy protocols. Hormone and targeted therapies may also play important roles. Some patients, particularly those with residual lesions after treatment, may benefit from hormone maintenance therapy after chemotherapy. Targeted therapies, such as MEKi, show good application prospects and are expected to change the treatment pattern of LGSOC. Continuing to further study the genomics of LGSOC, identify its specific gene changes, and combine traditional treatment methods with precision targeted therapy based on second-generation sequencing may be the direction for LGSOC to overcome the treatment bottleneck. In future clinical work, comprehensive genetic testing should be carried out for LGSOC patients to accumulate data for future scientific research, in order to find more effective methods and drugs for the treatment of LGSOC.
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Affiliation(s)
- Qing Wang
- Department of Obstetrics and Gynecology, Xuzhou Central Hospital, Xuzhou, Jiangsu, China
| | - Sheng-Han Cao
- Graduate School of Bengbu Medical University, Bengbu, Anhui, China
| | - Yan-Yu Li
- Department of Obstetrics and Gynecology, Xuzhou Central Hospital, Xuzhou, Jiangsu, China
| | - Jing-Bo Zhang
- Department of Obstetrics and Gynecology, Xuzhou Central Hospital, Xuzhou, Jiangsu, China
| | - Xin-Hui Yang
- Department of Obstetrics and Gynecology, Xuzhou Central Hospital, Xuzhou, Jiangsu, China
| | - Bei Zhang
- Department of Obstetrics and Gynecology, Xuzhou Central Hospital, Xuzhou, Jiangsu, China
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10
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Salutari V, Giudice E, Lorusso D. Maintenance therapy for newly and recurrent epithelial ovarian cancer: current therapies and future perspectives. Curr Opin Obstet Gynecol 2024; 36:9-17. [PMID: 38170548 DOI: 10.1097/gco.0000000000000931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
PURPOSE OF REVIEW Epithelial ovarian cancer (EOC) is the fifth cause of cancer death among women, and 70-80% of patients relapse within 2 years from the last cycle of first-line chemotherapy despite a complete response to chemotherapy and optimal debulking surgery. In this context, the goal of the maintenance treatment strategy is to prolong the time to recurrence. The recent development of targeted molecular therapies resulted in a broader spectrum of maintenance therapeutic options with consequent higher clinical benefit but less toxicity. This review summarizes the currently available maintenance strategies for newly and recurrent EOC, focusing on the decision-making process to personalize treatment and future perspectives. RECENT FINDINGS Over the past 10 years, several studies have demonstrated the clear benefit in terms of survival with the addition of a maintenance treatment strategy over the 'watchful waiting' approach both in the first line and recurrent setting. Since December 2016, the United States Food and Drug Administration and European Medicines Agency have approved four drugs for ovarian cancer maintenance based on the results of several clinical trials demonstrating efficacy and tolerability. These include the antiangiogenic drug Bevacizumab and three polyadenosine diphosphate-ribose polymerase (PARP) inhibitors: olaparib, niraparib, and rucaparib. SUMMARY These data led American and European Treatment guidelines to include bevacizumab, olaparib, niraparib, rucaparib, and combination bevacizumab-olaparib as maintenance treatment options in first-line and recurrent ovarian cancer therapy. However, with the availability of different maintenance options, identifying the best treatment choice for each patient can be challenging, and several clinical and molecular aspects have to be taken into account in the decision-making process.
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Affiliation(s)
- Vanda Salutari
- Gynaecology Oncology Unit, Fondazione Policlinico Universitario A Gemelli IRCCS
| | - Elena Giudice
- Gynaecology Oncology Unit, Fondazione Policlinico Universitario A Gemelli IRCCS
| | - Domenica Lorusso
- Gynaecology Oncology Unit, Fondazione Policlinico Universitario A Gemelli IRCCS
- Catholic University of Sacred Heart, Rome, Italy
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11
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Schweizer L, Krishnan R, Shimizu A, Metousis A, Kenny H, Mendoza R, Nordmann TM, Rauch S, Kelliher L, Heide J, Rosenberger FA, Bilecz A, Borrego SN, Strauss MT, Thielert M, Rodriguez E, Müller-Reif JB, Chen M, Yamada SD, Mund A, Lastra RR, Mann M, Lengyel E. Spatial proteo-transcriptomic profiling reveals the molecular landscape of borderline ovarian tumors and their invasive progression. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2023:2023.11.13.23298409. [PMID: 38014221 PMCID: PMC10680885 DOI: 10.1101/2023.11.13.23298409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
Serous borderline tumors (SBT) are epithelial neoplastic lesions of the ovaries that commonly have a good prognosis. In 10-15% of cases, however, SBT will recur as low-grade serous cancer (LGSC), which is deeply invasive and responds poorly to current standard chemotherapy1,2,3. While genetic alterations suggest a common origin, the transition from SBT to LGSC remains poorly understood4. Here, we integrate spatial proteomics5 with spatial transcriptomics to elucidate the evolution from SBT to LGSC and its corresponding metastasis at the molecular level in both the stroma and the tumor. We show that the transition of SBT to LGSC occurs in the epithelial compartment through an intermediary stage with micropapillary features (SBT-MP), which involves a gradual increase in MAPK signaling. A distinct subset of proteins and transcripts was associated with the transition to invasive tumor growth, including the neuronal splicing factor NOVA2, which was limited to expression in LGSC and its corresponding metastasis. An integrative pathway analysis exposed aberrant molecular signaling of tumor cells supported by alterations in angiogenesis and inflammation in the tumor microenvironment. Integration of spatial transcriptomics and proteomics followed by knockdown of the most altered genes or pharmaceutical inhibition of the most relevant targets confirmed their functional significance in regulating key features of invasiveness. Combining cell-type resolved spatial proteomics and transcriptomics allowed us to elucidate the sequence of tumorigenesis from SBT to LGSC. The approach presented here is a blueprint to systematically elucidate mechanisms of tumorigenesis and find novel treatment strategies.
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Affiliation(s)
- Lisa Schweizer
- Proteomics and Signal Transduction, Max Planck Institute of Biochemistry, Martinsried, Germany
- Department of Obstetrics and Gynecology/Section of Gynecologic Oncology, University of Chicago, Chicago, IL, USA
| | - Rahul Krishnan
- Department of Obstetrics and Gynecology/Section of Gynecologic Oncology, University of Chicago, Chicago, IL, USA
| | - Aasa Shimizu
- Department of Obstetrics and Gynecology/Section of Gynecologic Oncology, University of Chicago, Chicago, IL, USA
| | - Andreas Metousis
- Proteomics and Signal Transduction, Max Planck Institute of Biochemistry, Martinsried, Germany
| | - Hilary Kenny
- Department of Obstetrics and Gynecology/Section of Gynecologic Oncology, University of Chicago, Chicago, IL, USA
| | - Rachelle Mendoza
- Department of Pathology, The University of Chicago, Chicago, IL, USA
| | - Thierry M. Nordmann
- Proteomics and Signal Transduction, Max Planck Institute of Biochemistry, Martinsried, Germany
| | - Sarah Rauch
- Department of Obstetrics and Gynecology/Section of Gynecologic Oncology, University of Chicago, Chicago, IL, USA
| | - Lucy Kelliher
- Department of Obstetrics and Gynecology/Section of Gynecologic Oncology, University of Chicago, Chicago, IL, USA
| | - Janna Heide
- Department of Obstetrics and Gynecology/Section of Gynecologic Oncology, University of Chicago, Chicago, IL, USA
| | - Florian A. Rosenberger
- Proteomics and Signal Transduction, Max Planck Institute of Biochemistry, Martinsried, Germany
| | - Agnes Bilecz
- Department of Obstetrics and Gynecology/Section of Gynecologic Oncology, University of Chicago, Chicago, IL, USA
| | - Sanaa Nakad Borrego
- Department of Obstetrics and Gynecology/Section of Gynecologic Oncology, University of Chicago, Chicago, IL, USA
| | - Maximillian T. Strauss
- Proteomics Program, Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Marvin Thielert
- Proteomics and Signal Transduction, Max Planck Institute of Biochemistry, Martinsried, Germany
| | - Edwin Rodriguez
- Proteomics and Signal Transduction, Max Planck Institute of Biochemistry, Martinsried, Germany
| | - Johannes B. Müller-Reif
- Proteomics and Signal Transduction, Max Planck Institute of Biochemistry, Martinsried, Germany
| | - Mengjie Chen
- Medicine/Section of Genetic Medicine, The University of Chicago, Chicago, IL, USA
| | - S. Diane Yamada
- Department of Obstetrics and Gynecology/Section of Gynecologic Oncology, University of Chicago, Chicago, IL, USA
| | - Andreas Mund
- Proteomics Program, Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Ricardo R. Lastra
- Department of Pathology, The University of Chicago, Chicago, IL, USA
| | - Matthias Mann
- Proteomics and Signal Transduction, Max Planck Institute of Biochemistry, Martinsried, Germany
- Proteomics Program, Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Ernst Lengyel
- Department of Obstetrics and Gynecology/Section of Gynecologic Oncology, University of Chicago, Chicago, IL, USA
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12
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Hollis RL, Thomson JP, van Baal J, Ilenkovan N, Churchman M, van de Vijver K, Dijk F, Meynert AM, Bartos C, Rye T, Croy I, Diana P, van Gent M, Creedon H, Nirsimloo R, Lok C, Gourley C, Herrington CS. Distinct histopathological features are associated with molecular subtypes and outcome in low grade serous ovarian carcinoma. Sci Rep 2023; 13:7681. [PMID: 37169775 PMCID: PMC10175560 DOI: 10.1038/s41598-023-34627-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Accepted: 05/04/2023] [Indexed: 05/13/2023] Open
Abstract
Low grade serous ovarian carcinoma (LGSOC) demonstrates unique clinical and molecular features compared to other ovarian cancer types. The relationship between common histological features of LGSOC and molecular events, such as hormone receptor expression patterns and MAPK gene mutation status, remains poorly understood. Recent data suggest some of these molecular features may be biomarkers of response to recently introduced biologically-targeted therapies, namely endocrine therapy and MEK inhibitors. We utilize a cohort of 63 pathologically-confirmed LGSOC cases with whole exome sequencing and hormone receptor expression data to investigate these relationships. LGSOC cases demonstrated uniformly high oestrogen receptor (ER) expression, but variable progesterone receptor (PR) expression intensity. 60% and 37% of cases demonstrated micropapillary and macropapillary patterns of stromal invasion, respectively. 63% of cases demonstrated desmoplasia, which was significantly associated with advanced disease stage and visible residual disease after cytoreductive surgery. MAPK-mutant cases (KRAS, BRAF, NRAS) more frequently demonstrated macropapillary stromal invasion, while Chr1p loss was associated with desmoplasia and low PR expression. Presence of micropapillary stromal invasion and low PR expression were associated with significantly poorer survival after accounting for stage and residual disease status. Together, these data identify novel relationships between histopathological features and molecularly-defined subgroups in LGSOC.
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Affiliation(s)
- Robert L Hollis
- Nicola Murray Centre for Ovarian Cancer Research, Cancer Research UK Scotland Centre, Institute of Genetics and Cancer, University of Edinburgh, Crewe Road South, Edinburgh, EH4 2XU, UK.
| | - John P Thomson
- Nicola Murray Centre for Ovarian Cancer Research, Cancer Research UK Scotland Centre, Institute of Genetics and Cancer, University of Edinburgh, Crewe Road South, Edinburgh, EH4 2XU, UK
| | - Juliette van Baal
- Department of Gynaecologic Oncology, The Netherlands Cancer Institute, Antoni Van Leeuwenhoek, Amsterdam, The Netherlands
- Department of Pathology, The Netherlands Cancer Institute, Antoni Van Leeuwenhoek, Amsterdam, The Netherlands
| | - Narthana Ilenkovan
- Nicola Murray Centre for Ovarian Cancer Research, Cancer Research UK Scotland Centre, Institute of Genetics and Cancer, University of Edinburgh, Crewe Road South, Edinburgh, EH4 2XU, UK
- Cancer Research UK Scotland Centre, Beatson Institute for Cancer Research, Glasgow, UK
| | - Michael Churchman
- Nicola Murray Centre for Ovarian Cancer Research, Cancer Research UK Scotland Centre, Institute of Genetics and Cancer, University of Edinburgh, Crewe Road South, Edinburgh, EH4 2XU, UK
| | - Koen van de Vijver
- Department of Gynaecologic Oncology, The Netherlands Cancer Institute, Antoni Van Leeuwenhoek, Amsterdam, The Netherlands
- Department of Pathology, The Netherlands Cancer Institute, Antoni Van Leeuwenhoek, Amsterdam, The Netherlands
| | - Frederike Dijk
- Department of Gynaecologic Oncology, Amsterdam University Medical Centres, Amsterdam, The Netherlands
- Department of Pathology, Amsterdam University Medical Centres, Amsterdam, The Netherlands
| | - Alison M Meynert
- MRC Human Genetics Unit, Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, UK
| | - Clare Bartos
- Nicola Murray Centre for Ovarian Cancer Research, Cancer Research UK Scotland Centre, Institute of Genetics and Cancer, University of Edinburgh, Crewe Road South, Edinburgh, EH4 2XU, UK
| | - Tzyvia Rye
- Nicola Murray Centre for Ovarian Cancer Research, Cancer Research UK Scotland Centre, Institute of Genetics and Cancer, University of Edinburgh, Crewe Road South, Edinburgh, EH4 2XU, UK
| | - Ian Croy
- Nicola Murray Centre for Ovarian Cancer Research, Cancer Research UK Scotland Centre, Institute of Genetics and Cancer, University of Edinburgh, Crewe Road South, Edinburgh, EH4 2XU, UK
| | - Patricia Diana
- Nicola Murray Centre for Ovarian Cancer Research, Cancer Research UK Scotland Centre, Institute of Genetics and Cancer, University of Edinburgh, Crewe Road South, Edinburgh, EH4 2XU, UK
| | - Mignon van Gent
- Department of Gynaecologic Oncology, Amsterdam University Medical Centres, Amsterdam, The Netherlands
- Department of Pathology, Amsterdam University Medical Centres, Amsterdam, The Netherlands
| | - Helen Creedon
- Edinburgh Cancer Centre, Western General Hospital, NHS Lothian, Edinburgh, UK
| | - Rachel Nirsimloo
- Edinburgh Cancer Centre, Western General Hospital, NHS Lothian, Edinburgh, UK
| | - Christianne Lok
- Department of Gynaecologic Oncology, The Netherlands Cancer Institute, Antoni Van Leeuwenhoek, Amsterdam, The Netherlands
- Department of Pathology, The Netherlands Cancer Institute, Antoni Van Leeuwenhoek, Amsterdam, The Netherlands
| | - Charlie Gourley
- Nicola Murray Centre for Ovarian Cancer Research, Cancer Research UK Scotland Centre, Institute of Genetics and Cancer, University of Edinburgh, Crewe Road South, Edinburgh, EH4 2XU, UK
| | - C Simon Herrington
- Nicola Murray Centre for Ovarian Cancer Research, Cancer Research UK Scotland Centre, Institute of Genetics and Cancer, University of Edinburgh, Crewe Road South, Edinburgh, EH4 2XU, UK.
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13
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Grisham RN, Manning-Geist BL, Chui MH. Beyond the estrogen receptor: In search of predictive biomarkers for low-grade serous ovarian cancer. Cancer 2023; 129:1305-1307. [PMID: 36867575 DOI: 10.1002/cncr.34658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/04/2023]
Affiliation(s)
- Rachel N Grisham
- Department of Medicine, Memorial Sloan Kettering Cancer Center and Weill Cornell Medical College, New York, New York, USA
| | - Beryl L Manning-Geist
- Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, New York, USA
| | - M Herman Chui
- Department of Pathology and Laboratory Medicine, Memorial Sloan Kettering Cancer Center, New York, New York, USA
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14
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Němejcová K, Šafanda A, Bártů MK, Michálková R, Drozenová J, Fabian P, Hausnerová J, Laco J, Matěj R, Méhes G, Škapa P, Stružinská I, Dundr P. A comprehensive immunohistochemical analysis of 26 markers in 250 cases of serous ovarian tumors. Diagn Pathol 2023; 18:32. [PMID: 36855066 PMCID: PMC9972686 DOI: 10.1186/s13000-023-01317-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Accepted: 02/18/2023] [Indexed: 03/02/2023] Open
Abstract
BACKGROUND We examined a large cohort of serous tubo-ovarian tumors with 26 immunohistochemical markers, with the aim to assess their value for differential diagnosis and prognosis. METHODS Immunohistochemical analyses with 26 immunomarkers were performed on 250 primary tubo-ovarian tumors including 114 high grade serous carcinomas (HGSC), 97 low grade serous carcinomas (LGSC), and 39 serous borderline tumors (micropapillary variant, mSBT). The associations of overall positivity with clinicopathological characteristics were evaluated using the chi-squared test or Fisher's Exact test. RESULTS We found significantly different expression of p53, p16, ER, PR, PTEN, PAX2, Mammaglobin, RB1, Cyclin E1, stathmin, LMP2, L1CAM, CD44, and Ki67 in HGSCs compared to LGSCs. No significant differences were found between LGSC and mSBT. None of the other included markers (PAX8, ARID1A, HNF1B, Napsin A, CDX2, SATB2, MUC4, BRG1, AMACR, TTF1, BCOR, NTRK) showed any differences between the investigated serous tumors. Regarding the prognosis, only PR and stathmin showed a statistically significant prognostic meaning in LGSCs, with better overall survival (OS) and recurrence-free survival (RFS) in cases positive for PR, and worse outcome (RFS) for stathmin. None of the study markers showed prognostic significance in HGSCs. CONCLUSION We provided an extensive immunohistochemical analysis of serous ovarian/tubo-ovarian tumors. Although we found some differences in the expression of some markers in HGSCs compared to LGSCs, only p53, p16, and Ki67 seem to be useful in real diagnostic practice. We also suggested the best discriminative cut-off for Ki67 (10% of positive tumor cells) for distinguishing HGSC from LGSC. We found prognostic significance of PR and stathmin in LGSCs. Moreover, the high expression of stathmin could also be of predictive value in ovarian carcinomas as target-specific anti-stathmin effectors are potential therapeutic targets.
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Affiliation(s)
- Kristýna Němejcová
- Institute of Pathology, First Faculty of Medicine, Charles University and General University Hospital in Prague, 12800, Prague, Czech Republic.
| | - Adam Šafanda
- grid.411798.20000 0000 9100 9940Institute of Pathology, First Faculty of Medicine, Charles University and General University Hospital in Prague, 12800 Prague, Czech Republic
| | - Michaela Kendall Bártů
- grid.411798.20000 0000 9100 9940Institute of Pathology, First Faculty of Medicine, Charles University and General University Hospital in Prague, 12800 Prague, Czech Republic
| | - Romana Michálková
- grid.411798.20000 0000 9100 9940Institute of Pathology, First Faculty of Medicine, Charles University and General University Hospital in Prague, 12800 Prague, Czech Republic
| | - Jana Drozenová
- grid.4491.80000 0004 1937 116XDepartment of Pathology, Charles University, 3rd Faculty of Medicine, University Hospital Královské Vinohrady, 10034 Prague, Czech Republic
| | - Pavel Fabian
- grid.419466.8Department of Oncological Pathology, Masaryk Memorial Cancer Institute, Brno, Czech Republic
| | - Jitka Hausnerová
- grid.10267.320000 0001 2194 0956Department of Pathology, University Hospital Brno and Medical Faculty, Masaryk University, Brno, Czech Republic
| | - Jan Laco
- grid.4491.80000 0004 1937 116XThe Fingerland Department of Pathology, Charles University Faculty of Medicine in Hradec Králové and University Hospital Hradec Králové, Hradec Králové, Czech Republic
| | - Radoslav Matěj
- grid.411798.20000 0000 9100 9940Institute of Pathology, First Faculty of Medicine, Charles University and General University Hospital in Prague, 12800 Prague, Czech Republic ,grid.4491.80000 0004 1937 116XDepartment of Pathology, Charles University, 3rd Faculty of Medicine, University Hospital Královské Vinohrady, 10034 Prague, Czech Republic ,grid.4491.80000 0004 1937 116XDepartment of Pathology and Molecular Medicine, Third Faculty of Medicine, Charles University, Thomayer University Hospital, Prague, Czech Republic
| | - Gábor Méhes
- grid.7122.60000 0001 1088 8582Department of Pathology, Faculty of Medicine, University of Debrecen, 4032 Debrecen, Hungary
| | - Petr Škapa
- grid.412826.b0000 0004 0611 0905Department of Pathology and Molecular Medicine, Second Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic
| | - Ivana Stružinská
- grid.411798.20000 0000 9100 9940Institute of Pathology, First Faculty of Medicine, Charles University and General University Hospital in Prague, 12800 Prague, Czech Republic
| | - Pavel Dundr
- grid.411798.20000 0000 9100 9940Institute of Pathology, First Faculty of Medicine, Charles University and General University Hospital in Prague, 12800 Prague, Czech Republic
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15
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Through the Looking Glass: Updated Insights on Ovarian Cancer Diagnostics. Diagnostics (Basel) 2023; 13:diagnostics13040713. [PMID: 36832201 PMCID: PMC9955065 DOI: 10.3390/diagnostics13040713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 01/30/2023] [Accepted: 02/11/2023] [Indexed: 02/16/2023] Open
Abstract
Epithelial ovarian cancer (EOC) is the deadliest gynaecological malignancy and the eighth most prevalent cancer in women, with an abysmal mortality rate of two million worldwide. The existence of multiple overlapping symptoms with other gastrointestinal, genitourinary, and gynaecological maladies often leads to late-stage diagnosis and extensive extra-ovarian metastasis. Due to the absence of any clear early-stage symptoms, current tools only aid in the diagnosis of advanced-stage patients, wherein the 5-year survival plummets further to less than 30%. Therefore, there is a dire need for the identification of novel approaches that not only allow early diagnosis of the disease but also have a greater prognostic value. Toward this, biomarkers provide a gamut of powerful and dynamic tools to allow the identification of a spectrum of different malignancies. Both serum cancer antigen 125 (CA-125) and human epididymis 4 (HE4) are currently being used in clinics not only for EOC but also peritoneal and GI tract cancers. Screening of multiple biomarkers is gradually emerging as a beneficial strategy for early-stage diagnosis, proving instrumental in administration of first-line chemotherapy. These novel biomarkers seem to exhibit an enhanced potential as a diagnostic tool. This review summarizes existing knowledge of the ever-growing field of biomarker identification along with potential future ones, especially for ovarian cancer.
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16
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Zwimpfer TA, Tal O, Geissler F, Coelho R, Rimmer N, Jacob F, Heinzelmann-Schwarz V. Low grade serous ovarian cancer - A rare disease with increasing therapeutic options. Cancer Treat Rev 2023; 112:102497. [PMID: 36525716 DOI: 10.1016/j.ctrv.2022.102497] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Revised: 12/02/2022] [Accepted: 12/06/2022] [Indexed: 12/14/2022]
Abstract
High-grade serous ovarian cancers (HGSOCs) most commonly arise from the fimbrial end of the fallopian tube and harbor TP53 gene mutations. In contrast, low-grade serous ovarian cancers (LGSOCs) appear to have different pathological, epidemiological, and clinical features and should be seen as a distinct serous epithelial ovarian cancer subtype. Our current understanding of LGSOC is limited, and treatment has generally been derived from the more common HGSOCs due to a lack of separate trial data. LGSOCs are characterized by slow tumor growth and are assumed to develop from serous borderline ovarian tumors as precursors. These cancers are often estrogen-receptor positive and show an activated mitogen-activated protein kinase pathway together with KRAS and BRAF mutations and, rarely, TP53 mutations. These characteristics are now commonly used to guide therapeutical decision making and, consequently, a substantial part of treatment consists of maintenance with endocrine treatment, thus balancing disease stabilization and mild toxicity. Additionally, new trials are ongoing that examine the role of targeted therapies such as MEK inhibitors in combination with endocrine treatments. The purpose of this work is to summarize current knowledge and present ongoing trial efforts for LGSOCs.
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Affiliation(s)
- Tibor A Zwimpfer
- Peter MacCallum Cancer Center, East Melbourne, Victoria 3002, Australia; Department of Gynecological Oncology, University Hospital Basel, 4031 Basel, Switzerland.
| | - Ori Tal
- Department of Obstetrics and Gynecology, Edith Wolfson Medical Center, Holon, Israel
| | - Franziska Geissler
- Department of Gynecological Oncology, University Hospital Basel, 4031 Basel, Switzerland
| | - Ricardo Coelho
- Ovarian Cancer Research, Department of Biomedicine, University of Basel, 4031 Basel, Switzerland
| | - Natalie Rimmer
- Ovarian Cancer Research, Department of Biomedicine, University of Basel, 4031 Basel, Switzerland
| | - Francis Jacob
- Ovarian Cancer Research, Department of Biomedicine, University of Basel, 4031 Basel, Switzerland
| | - Viola Heinzelmann-Schwarz
- Peter MacCallum Cancer Center, East Melbourne, Victoria 3002, Australia; Ovarian Cancer Research, Department of Biomedicine, University of Basel, 4031 Basel, Switzerland
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17
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Gershenson DM, Cobb LP, Westin SN, Zhang Y, Jazaeri A, Malpica A, Sun CC. Contemporary primary treatment of women with stage II-IV low-grade serous ovarian/peritoneal cancer (LGSOC): Determinants of relapse and disease-free survival. Gynecol Oncol 2022; 167:139-145. [PMID: 36137845 DOI: 10.1016/j.ygyno.2022.09.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Revised: 08/31/2022] [Accepted: 09/05/2022] [Indexed: 12/15/2022]
Abstract
OBJECTIVE The purpose of the present study is to describe a cohort who received contemporary primary treatment for stage II-IV low-grade serous ovarian/peritoneal cancer (LGSOC), including patient characteristics and determinants of relapse and disease-free survival. METHODS The study included 99 patients: 1) with pathologically confirmed stage II-IV LGSOC of the ovary or peritoneum, 2) who underwent primary treatment consisting of cytoreductive surgery and either a) platinum/taxane chemotherapy followed by aromatase inhibitor maintenance therapy or b) aromatase inhibitor monotherapy, and 3) for whom there was availability of clinical data. Descriptive statistics were used to characterize clinicodemographic features. Subgroups were compared for PFS and OS. Multivariable Cox regression analyses were performed. RESULTS Median PFS for the entire cohort was 56.8 months (95% CI, 41.3-NE), and median OS was 130.7 months (95% CI, 115.0-146.4). Forty-nine of 99 (49.5%) patients have relapsed to date. For these 49 patients, median time from diagnosis to relapse was 29.6 months (95% CI, 24.6-33.1) (range, 5.4-69.1 months). Only 1/49 (2%) patients who relapsed did so >5 years from diagnosis. Fifty (50.0%) patients have not experienced disease progression or relapse. Median follow-up time for these 50 patients is 86.2 months (range, 25.3-169.0). Thirty-three of the 50 (66.0%) have been followed for >5 years from diagnosis. On regression analyses, factors associated with improved patient outcomes-either PFS, OS, or both-included no gross residual disease, normal serum CA 125 at diagnosis, primary peritoneal site, and presence of extensive psammomatous calcifications. CONCLUSIONS This is the first report to describe the clinicopathologic features and outcomes of women with stage II-IV LGSOC who received contemporary primary therapy.
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Affiliation(s)
- David M Gershenson
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, PO Box 301439, Houston, TX 77230-1429, USA.
| | - Lauren P Cobb
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, PO Box 301439, Houston, TX 77230-1429, USA.
| | - Shannon N Westin
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, PO Box 301439, Houston, TX 77230-1429, USA.
| | - Yingao Zhang
- Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, TX 77030, USA.
| | - Amir Jazaeri
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, PO Box 301439, Houston, TX 77230-1429, USA
| | - Anais Malpica
- Department of Pathology, The University of Texas MD Anderson Cancer Center, PO Box 301439, Houston, TX 77230-1429, USA.
| | - Charlotte C Sun
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, PO Box 301439, Houston, TX 77230-1429, USA.
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18
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Molecular characterization of low-grade serous ovarian carcinoma identifies genomic aberrations according to hormone receptor expression. NPJ Precis Oncol 2022; 6:47. [PMID: 35768582 PMCID: PMC9242985 DOI: 10.1038/s41698-022-00288-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Accepted: 05/17/2022] [Indexed: 12/03/2022] Open
Abstract
Hormone receptor expression is a characteristic of low-grade serous ovarian carcinoma (LGSOC). Studies investigating estrogen receptor (ER) and progesterone receptor (PR) expression levels suggest its prognostic and predictive significance, although their associations with key molecular aberrations are not well understood. As such, we sought to describe the specific genomic profiles associated with different ER/PR expression patterns and survival outcomes in a cohort of patients with advanced disease. The study comprised fifty-five advanced-staged (III/IV) LGSOCs from the Canadian Ovarian Experimental Unified Resource (COEUR) for which targeted mutation sequencing, copy-number aberration, clinical and follow-up data were available. ER, PR, and p16 expression were assessed by immunohistochemistry. Tumors were divided into low and high ER/PR expression groups based on Allred scoring. Copy number analysis revealed that PR-low tumors (Allred score <2) had a higher fraction of the genome altered by copy number changes compared to PR-high tumors (p = 0.001), with cancer genes affected within specific loci linked to altered peptidyl-tyrosine kinase, MAP-kinase, and PI3-kinase signaling. Cox regression analysis showed that ER-high (p = 0.02), PR-high (p = 0.03), stage III disease (p = 0.02), low residual disease burden (p = 0.01) and normal p16 expression (p<0.001) were all significantly associated with improved overall survival. This study provides evidence that genomic aberrations are linked to ER/PR expression in primary LGSOC.
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19
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Ng CW, Wong KK. Impact of estrogen receptor expression on prognosis of ovarian cancer according to antibody clone used for immunohistochemistry: a meta-analysis. J Ovarian Res 2022; 15:63. [PMID: 35610648 PMCID: PMC9128086 DOI: 10.1186/s13048-022-01001-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2021] [Accepted: 05/16/2022] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND The prognostic value of the expression of estrogen receptor (ER) subtypes ER⍺ and ERβ in ovarian cancer has previously been evaluated by meta-analyses. However, the results are contradictory and controversial. METHODS We conducted an updated meta-analysis with stringent inclusion criteria to ensure homogeneous studies to determine the effect of ER subtypes on ovarian cancer prognosis. Articles were retrieved by systematic search of PubMed and Web of Science for articles dated up to June 2021. Only studies with known hazard ratio (HR) and antibody clone for immunochemistry (IHC) were included. Pooled HRs with the corresponding 95% confidence intervals (CIs) were calculated for the effect of ER⍺ and ERβ expression on ovarian cancer patient progression-free survival (PFS) and overall survival (OS). RESULTS A total of 17 studies were included, of which 11 and 13 studies examined the relationships between ER⍺ expression and PFS and OS, respectively, and 5 and 7 studies examined the relationships between ERβ expression and PFS and OS, respectively. Neither ER⍺ expression (random-effects model; HR = 0.99, 95% CI = 0.83-1.18) nor ERβ expression (fixed-effects model; HR = 0.94, 95% CI = 0.69-1.27) was associated with PFS. Random-effects models showed that ER⍺ expression (HR = 0.81, 95% CI = 0.64-1.02) and ERβ expression (HR = 0.75, 95% CI = 0.50-1.13) were only marginally and not significantly associated with better OS. Subgroup analysis revealed that ER⍺ expression determined using antibody clone 1D5 (HR = 0.75, 95% CI = 0.64-0.88) and ERβ expression determined using ERβ1-specific-antibody clone PPG5/10 or EMR02 (HR = 0.65, 95% CI = 0.50-0.86) were associated with significantly better OS, but ER expression determined using other antibodies was not. CONCLUSIONS In conclusion, a higher ER⍺ expression and ERβ expression are significantly associated with a better survival of ovarian cancer patients, but the results from previous prognostic studies are significantly dependent on the choice of specific ER antibody clones used in immunohistochemistry analysis.
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Affiliation(s)
- Chun Wai Ng
- Department of Gynecologic Oncology & Reproductive Medicine, Room T4-3900, Clinical Research Building, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX, 77030, USA
| | - Kwong-Kwok Wong
- Department of Gynecologic Oncology & Reproductive Medicine, Room T4-3900, Clinical Research Building, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX, 77030, USA.
- The University of Texas MD Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences, Houston, TX, USA.
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Low-Grade Serous Carcinoma of the Ovary: The Current Status. Diagnostics (Basel) 2022; 12:diagnostics12020458. [PMID: 35204549 PMCID: PMC8871133 DOI: 10.3390/diagnostics12020458] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Revised: 01/30/2022] [Accepted: 02/04/2022] [Indexed: 11/16/2022] Open
Abstract
Low-grade serous carcinoma (LGSC) of the ovary is a rare histological subtype of epithelial ovarian carcinoma. It has distinct clinical behavior and a specific molecular profile. Compared with high-grade serous carcinoma, this tumor presents at a younger age, has an indolent course, and is associated with prolonged survival. LGSC can arise de novo or originate following a serous borderline tumor (SBT). Pathological differentiation between LGSC and other ovarian carcinoma histological subtypes is fundamental. Several factors might influence the overall outcome, such as the age at diagnosis, current smoking, elevated body mass index, mutational status, hormonal receptors’ expression, and Ki-67 proliferation index. Surgery is the main treatment option in LGSC, and efforts must be maximized to achieve a microscopic residual in metastatic disease. Despite being relatively chemo-resistant, adjuvant platinum-based chemotherapy remains the standard of care in LGSC. Hormonal maintenance therapy after adjuvant chemotherapy results in improved outcomes. Treatment options for disease recurrence include secondary cytoreductive surgery, chemotherapy, hormonal therapy, targeted therapy, and clinical trials. Advancements in genomic studies and targeted therapies are expected to change the treatment landscape in LGSC.
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The Evolution of Ovarian Carcinoma Subclassification. Cancers (Basel) 2022; 14:cancers14020416. [PMID: 35053578 PMCID: PMC8774015 DOI: 10.3390/cancers14020416] [Citation(s) in RCA: 42] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 01/11/2022] [Accepted: 01/11/2022] [Indexed: 02/06/2023] Open
Abstract
Simple Summary Historically, cancers presenting with their main tumor mass in the ovary have been classified as ovarian carcinomas (a concise term for epithelial ovarian cancer) and treated with a one-size-fits-all approach. Over the last two decades, a growing molecular understanding established that ovarian carcinomas consist of several distinct histologic types, which practically represent different diseases. Further research is now delineating several molecular subtypes within each histotype. This histotype/molecular subtype subclassification provides a framework of grouping tumors based on molecular similarities for research, clinical trial inclusion and future patient management. Abstract The phenotypically informed histotype classification remains the mainstay of ovarian carcinoma subclassification. Histotypes of ovarian epithelial neoplasms have evolved with each edition of the WHO Classification of Female Genital Tumours. The current fifth edition (2020) lists five principal histotypes: high-grade serous carcinoma (HGSC), low-grade serous carcinoma (LGSC), mucinous carcinoma (MC), endometrioid carcinoma (EC) and clear cell carcinoma (CCC). Since histotypes arise from different cells of origin, cell lineage-specific diagnostic immunohistochemical markers and histotype-specific oncogenic alterations can confirm the morphological diagnosis. A four-marker immunohistochemical panel (WT1/p53/napsin A/PR) can distinguish the five principal histotypes with high accuracy, and additional immunohistochemical markers can be used depending on the diagnostic considerations. Histotypes are further stratified into molecular subtypes and assessed with predictive biomarker tests. HGSCs have recently been subclassified based on mechanisms of chromosomal instability, mRNA expression profiles or individual candidate biomarkers. ECs are composed of the same molecular subtypes (POLE-mutated/mismatch repair-deficient/no specific molecular profile/p53-abnormal) with the same prognostic stratification as their endometrial counterparts. Although methylation analyses and gene expression and sequencing showed at least two clusters, the molecular subtypes of CCCs remain largely elusive to date. Mutational and immunohistochemical data on LGSC have suggested five molecular subtypes with prognostic differences. While our understanding of the molecular composition of ovarian carcinomas has significantly advanced and continues to evolve, the need for treatment options suitable for these alterations is becoming more obvious. Further preclinical studies using histotype-defined and molecular subtype-characterized model systems are needed to expand the therapeutic spectrum for women diagnosed with ovarian carcinomas.
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22
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Low Grade Serous Ovarian Cancer: Is disturbed Receptor Ratio (ER: PgR) an Etiogenic Factor? INDIAN JOURNAL OF GYNECOLOGIC ONCOLOGY 2021. [DOI: 10.1007/s40944-021-00556-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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23
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Frontline Maintenance Treatment for Ovarian Cancer. Curr Oncol Rep 2021; 23:97. [PMID: 34125335 PMCID: PMC8203502 DOI: 10.1007/s11912-021-01088-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/03/2021] [Indexed: 12/24/2022]
Abstract
Purpose of Review Advanced epithelial ovarian cancer remains the most lethal gynaecological cancer. Most patients with advanced disease will relapse within 3 years after primary treatment with surgery and chemotherapy. Recurrences become increasing difficult to treat due to the emergence of drug resistance and 5-year survival has changed little over the last decade. Maintenance treatment, here defined as treatment given beyond primary chemotherapy, can both consolidate the response and prolong the control of disease which is an approach to improve survival. Recent Findings Here we review maintenance strategies such as targeting angiogenesis, interference of DNA repair through inhibition of PARP, combinations of targeting agents, and immunotherapy and hormonal therapy. Summary Much has been learnt from the success and challenges of these treatments that have in the last few years which led to significant reduction in disease recurrence, changed the guidelines for treatment, and established a new paradigm for the treatment of ovarian cancer.
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24
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Voutsadakis IA. A systematic review and meta-analysis of hormone receptor expression in low-grade serous ovarian carcinoma. Eur J Obstet Gynecol Reprod Biol 2020; 256:172-178. [PMID: 33246201 DOI: 10.1016/j.ejogrb.2020.11.021] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 09/25/2020] [Accepted: 11/06/2020] [Indexed: 11/15/2022]
Abstract
OBJECTIVE Serous ovarian carcinoma is the most common histological type of ovarian cancer, with high-grade serous ovarian carcinoma (HGSOC) being more common than low-grade serous ovarian carcinoma (LGSOC). Despite pathogenic and clinical differences, both grades of serous ovarian carcinoma share the propensity to express receptors for the female hormones - oestrogen (ERs) and progesterone receptors (PRs) - albeit in differing frequencies. STUDY DESIGN Systematic review and meta-analysis of studies reporting the expression of hormone receptors in LGSOC, and comparison with expression in HGSOC. RESULTS Expression of ERs is observed in 80.7 % of patients with LGSOC [95 % confidence interval (CI) 72.2-89.1 %] and 61.5 % of patients with HGSOC (95 % CI 38.8-84.1 %). Expression of PRs is observed in 54.4 % of patients with LGSOC (95 % CI 44.3-64.4 %) and 30.7 % of patients with HGSOC (95 % CI 15.7-45.7 %). CONCLUSION A higher percentage of LGSOCs are positive for ER expression compared with HGSOCs. Similarly, a higher percentage of LGSOCs are positive for PR expression, although PR expression is lower than ER expression. Expression of hormone receptors may represent a therapeutic opportunity for treatment with agents that block their activity, especially in LGSOC which is less responsive to chemotherapy and therapeutic options are limited.
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Affiliation(s)
- Ioannis A Voutsadakis
- Division of Medical Oncology, Department of Internal Medicine, Sault Area Hospital, Sault Ste Marie, ON, Canada; Division of Clinical Sciences, Northern Ontario School of Medicine, Sudbury, ON, Canada.
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25
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Gershenson DM, Cobb LP, Sun CC. Endocrine therapy in the management of low-grade serous ovarian/peritoneal carcinoma: Mounting evidence for therelative efficacy of tamoxifen and aromatase inhibitors. Gynecol Oncol 2020; 159:601-603. [PMID: 33019983 DOI: 10.1016/j.ygyno.2020.09.049] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Accepted: 09/28/2020] [Indexed: 11/28/2022]
Affiliation(s)
- David M Gershenson
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, United States.
| | - Lauren P Cobb
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Charlotte C Sun
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
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26
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Therapeutic Approach to Low-Grade Serous Ovarian Carcinoma: State of Art and Perspectives of Clinical Research. Cancers (Basel) 2020; 12:cancers12051336. [PMID: 32456205 PMCID: PMC7281204 DOI: 10.3390/cancers12051336] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 05/14/2020] [Accepted: 05/21/2020] [Indexed: 12/14/2022] Open
Abstract
Low-grade serous ovarian carcinoma (LGSOC) is a distinct pathologic and clinical entity, characterized by less aggressive biological behavior, lower sensitivity to chemotherapy and longer survival compared with high-grade serous ovarian carcinoma. LGSOC often harbors activating mutations of genes involved in mitogen activated protein kinase (MAPK) pathway. Patients with disease confined to the gonad(s) should undergo bilateral salpingo-oophorectomy, total hysterectomy and comprehensive surgical staging, although fertility-sparing surgery can be considered in selected cases. Women with stage IA-IB disease should undergo observation alone after surgery, whereas observation, chemotherapy or endocrine therapy are all possible options for those with stage IC-IIA disease. Patients with advanced disease should undergo primary debulking surgery with the aim of removing all macroscopically detectable disease, whereas neoadjuvant chemotherapy followed by interval debuking surgery. After surgery, the patients can receive either carboplatin plus paclitaxel followed by endocrine therapy or endocrine therapy alone. Molecularly targeted agents, and especially MEK inhibitors and Cyclin-dependent kinase (CDK) inhibitors, are currently under evaluation. Additional research on the genomics of LGSOC and clinical trials on the combination of MEK inhibitors with hormonal agents, other molecularly targeted agents or metformin, are strongly warranted to improve the prognosis of patients with this malignancy.
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