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Yang Z, Liu X, Yang X, Liao QP. Second primary malignancies after ovarian cancer: A SEER-based analysis (1975-2016). Taiwan J Obstet Gynecol 2022; 61:80-85. [PMID: 35181052 DOI: 10.1016/j.tjog.2021.11.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/06/2021] [Indexed: 10/19/2022] Open
Abstract
OBJECTIVE To investigate the risk of occurrence of second primary malignancies (SPMs) in survivors of ovarian cancer (OC) using large data from the Surveillance, Epidemiology, and End Results (SEER) database. MATERIALS AND METHODS Multiple primaries standardized incidence ratios (MP-SIRs) to calculate the risk of developing second primary malignancies after a diagnosis of ovarian cancer. RESULTS Of our included 59,880 women with OC, 3972 cases (6.6%) developed 4495 s primary malignancies over an average follow-up period of 114.39 (±102.66) months. Overall, the risk of occurrence of second primary malignancies after a diagnosis of OC was greater than what would be expected for a reference US population (SIR = 1.05, 95%CI = 1.02-1.08, p-value < 0.05). The occurrence of second myeloid malignancies and second thyroid cancer were most notable across our latency periods. Among the most significant second primary malignancies by latency were malignancies of the appendix (SIR = 14.04, 95%CI = 5.65-28.93, p-value <0.05) at 2-11 months, the small intestine (SIR = 3.15, 95%CI = 1.76-5.2, p-value <0.05) at 12-59 months, and the urinary bladder (SIR = 1.63, 95%CI = 1.3-2.02, p-value <0.05) after 10 years of an OC diagnosis. CONCLUSION Women with OC are at significant risk for the development of second primary malignancies across all sites, as compared to a reference US population, and may benefit from second primary malignancies site-specific screening post-diagnosis.
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Affiliation(s)
- Zihui Yang
- Department of Obstetrics and Gynecology, Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, Beijing, 102218, China.
| | - Xinyu Liu
- Department of Reproductive Medicine, Shenyang 204 Hospital, Liaoning, 110000, China.
| | - Xi Yang
- Department of Obstetrics and Gynecology, Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, Beijing, 102218, China.
| | - Qin-Ping Liao
- Department of Obstetrics and Gynecology, Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, Beijing, 102218, China.
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2
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Evangelista EA, Cho CW, Aliwarga T, Totah RA. Expression and Function of Eicosanoid-Producing Cytochrome P450 Enzymes in Solid Tumors. Front Pharmacol 2020; 11:828. [PMID: 32581794 PMCID: PMC7295938 DOI: 10.3389/fphar.2020.00828] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Accepted: 05/20/2020] [Indexed: 12/14/2022] Open
Abstract
Oxylipins derived from the oxidation of polyunsaturated fatty acids (PUFAs) act as important paracrine and autocrine signaling molecules. A subclass of oxylipins, the eicosanoids, have a broad range of physiological outcomes in inflammation, the immune response, cardiovascular homeostasis, and cell growth regulation. Consequently, eicosanoids are implicated in the pathophysiology of various diseases, most notably cancer, where eicosanoid mediated signaling is involved in tumor development, progression, and angiogenesis. Cytochrome P450s (CYPs) are a superfamily of heme monooxygenases generally involved in the clearance of xenobiotics while a subset of isozymes oxidize PUFAs to eicosanoids. Several eicosanoid forming CYPs are overexpressed in tumors, elevating eicosanoid levels and suggesting a key function in tumorigenesis and progression of tumors in the lung, breast, prostate, and kidney. This review summarizes the current understanding of CYPs' involvement in solid tumor etiology and progression providing supporting public data for gene expression from The Cancer Genome Atlas.
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Affiliation(s)
- Eric A Evangelista
- Department of Pharmacy, School of Pharmacy, University of Washington, Seattle, WA, United States
| | - Christi W Cho
- Department of Medicinal Chemistry, School of Pharmacy, University of Washington, Seattle, WA, United States
| | - Theresa Aliwarga
- Department of Pharmaceutics, School of Pharmacy, University of Washington, Seattle, WA, United States
| | - Rheem A Totah
- Department of Medicinal Chemistry, School of Pharmacy, University of Washington, Seattle, WA, United States
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MiR-200c sensitizes Olaparib-resistant ovarian cancer cells by targeting Neuropilin 1. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2020; 39:3. [PMID: 31898520 PMCID: PMC6939329 DOI: 10.1186/s13046-019-1490-7] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Accepted: 11/25/2019] [Indexed: 02/07/2023]
Abstract
BACKGROUND Ovarian cancer (OC) is the most lethal gynecological malignancy and the second leading cause of cancer-related death in women. Treatment with PARP inhibitors (PARPi), such as Olaparib, has been recently introduced for OC patients, but resistance may occur and underlying mechanisms are still poorly understood. The aim of this study is to identify target genes within the tumor cells that might cause resistance to Olaparib. We focused on Neuropilin 1 (NRP1), a transmembrane receptor expressed in OC and correlated with poor survival, which has been also proposed as a key molecule in OC multidrug resistance. METHODS Using three OC cell lines (UWB, UWB-BRCA and SKOV3) as model systems, we evaluated the biological and molecular effects of Olaparib on OC cell growth, cell cycle, DNA damage and apoptosis/autophagy induction, through MTT and colony forming assays, flow cytometry, immunofluorescence and Western blot analyses. We evaluated NRP1 expression in OC specimens and cell lines by Western blot and qRT-PCR, and used RNA interference to selectively inhibit NRP1. To identify miR-200c as a regulator of NRP1, we used miRNA target prediction algorithms and Pearsons' correlation analysis in biopsies from OC patients. Then, we used a stable transfection approach to overexpress miR-200c in Olaparib-resistant cells. RESULTS We observed that NRP1 is expressed at high levels in resistant cells (SKOV3) and is upmodulated in partially sensitive cells (UWB-BRCA) upon prolonged Olaparib treatment, leading to poor drug response. Our results show that the selective inhibition of NRP1 is able to overcome Olaparib resistance in SKOV3 cells. Moreover, we demonstrated that miR-200c can target NRP1 in OC cells, causing its downmodulation, and that miR-200c overexpression is a valid approach to restore Olaparib sensitivity in OC resistant cells. CONCLUSIONS These data demonstrate that miR-200c significantly enhanced the anti-cancer efficacy of Olaparib in drug-resistant OC cells. Thus, the combination of Olaparib with miRNA-based therapy may represent a promising treatment for drug resistant OC, and our data may help in designing novel precision medicine trials for optimizing the clinical use of PARPi.
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Lin Y, Kong F, Li Y, Wang Y, Song L, Zhao C. The tumor suppressor OVCA1 is a short half-life protein degraded by the ubiquitin-proteasome pathway. Oncol Lett 2019; 17:2328-2334. [PMID: 30675298 PMCID: PMC6341780 DOI: 10.3892/ol.2018.9852] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Accepted: 11/19/2018] [Indexed: 12/14/2022] Open
Abstract
Ovarian cancer gene 1 (OVCA1) is a tumor suppressor associated with ovarian cancer, which is involved in cell proliferation regulation, embryonic development and tumorigenesis. Loss of heterozygosity in the OVCA1 gene occurs in 50-86% of cases of ovarian cancer; however, the physiological and biochemical functions of OVCA1 are not yet clear. In the present study, the stability and degradation of OVCA1 were investigated in A2780, Hela and 293 cells. The results revealed that the OVCA1 protein was unstable by MG132 inhibiting proteasome mediated degradation, co-immunoprecipitation and half-life measurement experiments. The cellular protein levels of endogenous OVCA1 were too low to be detected by western blotting. In addition, carbobenzoxy-L-leucyl-L-leucyl-L-leucinal inhibited the degradation of OVCA1 in cells. The co-immunoprecipitation assay revealed that the OVCA1 protein interacted with ubiquitin to form a poly-ubiquitinated complex in cells. The half-life of OVCA1, measured by inhibiting protein synthesis with cycloheximide, was <2 h. The present study demonstrated that OVCA1 may be degraded by the ubiquitin-mediated proteasome pathway and may be considered a short half-life protein. In conclusion, the regulation of OVCA1 protein degradation via the ubiquitin-proteasome pathway may represent a novel direction in the development of ovarian cancer therapy.
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Affiliation(s)
- Yingwei Lin
- Department of Clinical Laboratory, The Second Hospital of Dalian Medical University, Dalian, Liaoning 116023, P.R. China
| | - Fandou Kong
- Department of Gynecology and Obstetrics, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, P.R. China
| | - Yan Li
- College of Laboratory Medicine, Dalian Medical University, Dalian, Liaoning 116044, P.R. China
| | - Yinghui Wang
- College of Laboratory Medicine, Dalian Medical University, Dalian, Liaoning 116044, P.R. China
| | - Ling Song
- College of Laboratory Medicine, Dalian Medical University, Dalian, Liaoning 116044, P.R. China
| | - Chunyan Zhao
- College of Laboratory Medicine, Dalian Medical University, Dalian, Liaoning 116044, P.R. China
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Loss of diphthamide pre-activates NF-κB and death receptor pathways and renders MCF7 cells hypersensitive to tumor necrosis factor. Proc Natl Acad Sci U S A 2015; 112:10732-7. [PMID: 26261303 DOI: 10.1073/pnas.1512863112] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The diphthamide on human eukaryotic translation elongation factor 2 (eEF2) is the target of ADP ribosylating diphtheria toxin (DT) and Pseudomonas exotoxin A (PE). This modification is synthesized by seven dipthamide biosynthesis proteins (DPH1-DPH7) and is conserved among eukaryotes and archaea. We generated MCF7 breast cancer cell line-derived DPH gene knockout (ko) cells to assess the impact of complete or partial inactivation on diphthamide synthesis and toxin sensitivity, and to address the biological consequence of diphthamide deficiency. Cells with heterozygous gene inactivation still contained predominantly diphthamide-modified eEF2 and were as sensitive to PE and DT as parent cells. Thus, DPH gene copy number reduction does not affect overall diphthamide synthesis and toxin sensitivity. Complete inactivation of DPH1, DPH2, DPH4, and DPH5 generated viable cells without diphthamide. DPH1ko, DPH2ko, and DPH4ko harbored unmodified eEF2 and DPH5ko ACP- (diphthine-precursor) modified eEF2. Loss of diphthamide prevented ADP ribosylation of eEF2, rendered cells resistant to PE and DT, but does not affect sensitivity toward other protein synthesis inhibitors, such as saporin or cycloheximide. Surprisingly, cells without diphthamide (independent of which the DPH gene compromised) were presensitized toward nuclear factor of kappa light polypeptide gene enhancer in B cells (NF-κB) and death-receptor pathways without crossing lethal thresholds. In consequence, loss of diphthamide rendered cells hypersensitive toward TNF-mediated apoptosis. This finding suggests a role of diphthamide in modulating NF-κB, death receptor, or apoptosis pathways.
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Suh KS, Park SW, Castro A, Patel H, Blake P, Liang M, Goy A. Ovarian cancer biomarkers for molecular biosensors and translational medicine. Expert Rev Mol Diagn 2014; 10:1069-83. [DOI: 10.1586/erm.10.87] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Abstract
Ovarian cancer is the leading cause of death among gynecological cancers. It exhibits great heterogeneity in tumor biology and treatment response. Germline mutations of DNA repair genes BRCA1/2 are the fundamental defects in hereditary ovarian cancer that expresses a distinct phenotype of high response rates to platinum agents, improved disease-free intervals and survival rates, and high-grade serous histology. The term "BRCAness" describes the phenotypic traits that some sporadic ovarian tumors share with tumors in BRCA1/2 germline mutation carriers and reflects similar causative molecular abnormalities. BRCA pathway studies and molecular profiling reveal BRCA-related defects in almost half of the cases of ovarian cancer. BRCA-like tumors are particularly sensitive to DNA-damaging agents (e.g., platinum agents) because of inadequate BRCA-mediated DNA repair mechanisms, such as nucleotide-excision repair and homologous recombination (HR). Additional inhibition of other DNA repair pathways leads to synthetic lethality in HR-deficient cells; this has been employed in the treatment of BRCA-like ovarian tumors with poly(ADP-ribose) polymerase inhibitors with promising results. This article presents a comprehensive review of the relevant literature on the role of BRCAness in ovarian cancer with respect to BRCA function, methods of BRCA epigenetic defect detection and molecular profiling, and the implications of BRCA dysfunction in the treatment of ovarian cancer.
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Affiliation(s)
- Georgios Rigakos
- Third Department of Medical Oncology, Hygeia Hospital, Athens, Greece.
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8
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Birch AH, Arcand SL, Oros KK, Rahimi K, Watters AK, Provencher D, Greenwood CM, Mes-Masson AM, Tonin PN. Chromosome 3 anomalies investigated by genome wide SNP analysis of benign, low malignant potential and low grade ovarian serous tumours. PLoS One 2011; 6:e28250. [PMID: 22163003 PMCID: PMC3232202 DOI: 10.1371/journal.pone.0028250] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2011] [Accepted: 11/04/2011] [Indexed: 02/01/2023] Open
Abstract
Ovarian carcinomas exhibit extensive heterogeneity, and their etiology remains unknown. Histological and genetic evidence has led to the proposal that low grade ovarian serous carcinomas (LGOSC) have a different etiology than high grade carcinomas (HGOSC), arising from serous tumours of low malignant potential (LMP). Common regions of chromosome (chr) 3 loss have been observed in all types of serous ovarian tumours, including benign, suggesting that these regions contain genes important in the development of all ovarian serous carcinomas. A high-density genome-wide genotyping bead array technology, which assayed >600,000 markers, was applied to a panel of serous benign and LMP tumours and a small set of LGOSC, to characterize somatic events associated with the most indolent forms of ovarian disease. The genomic patterns inferred were related to TP53, KRAS and BRAF mutations. An increasing frequency of genomic anomalies was observed with pathology of disease: 3/22 (13.6%) benign cases, 40/53 (75.5%) LMP cases and 10/11 (90.9%) LGOSC cases. Low frequencies of chr3 anomalies occurred in all tumour types. Runs of homozygosity were most commonly observed on chr3, with the 3p12-p11 candidate tumour suppressor region the most frequently homozygous region in the genome. An LMP harboured a homozygous deletion on chr6 which created a GOPC-ROS1 fusion gene, previously reported as oncogenic in other cancer types. Somatic TP53, KRAS and BRAF mutations were not observed in benign tumours. KRAS-mutation positive LMP cases displayed significantly more chromosomal aberrations than BRAF-mutation positive or KRAS and BRAF mutation negative cases. Gain of 12p, which harbours the KRAS gene, was particularly evident. A pathology review reclassified all TP53-mutation positive LGOSC cases, some of which acquired a HGOSC status. Taken together, our results support the view that LGOSC could arise from serous benign and LMP tumours, but does not exclude the possibility that HGOSC may derive from LMP tumours.
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Affiliation(s)
- Ashley H. Birch
- Department of Human Genetics, McGill University, Montreal, Canada
| | - Suzanna L. Arcand
- The Research Institute of the McGill University Health Centre, Montreal, Canada
| | - Kathleen K. Oros
- Division of Clinical Epidemiology and Segal Cancer Centre, Lady Davis Research Institute, Jewish General Hospital, Montreal, Canada
| | - Kurosh Rahimi
- Department of Pathology, Centre Hospitalier de l'Université de Montréal (CHUM), Montréal, Canada
| | - A. Kevin Watters
- Department of Pathology, McGill University and McGill University Health Centre (MUHC), Montréal, Canada
| | - Diane Provencher
- Centre de recherche du Centre hospitalier de l'Université de Montréal (CRCHUM), Institut du cancer de Montréal, Montreal, Canada
- Division of Gynecologic Oncology, Université de Montréal, Montreal, Canada
| | - Celia M. Greenwood
- Division of Clinical Epidemiology and Segal Cancer Centre, Lady Davis Research Institute, Jewish General Hospital, Montreal, Canada
- Department of Oncology, McGill University, Montreal, Canada
- Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, Canada
| | - Anne-Marie Mes-Masson
- Centre de recherche du Centre hospitalier de l'Université de Montréal (CRCHUM), Institut du cancer de Montréal, Montreal, Canada
- Department of Medicine, Université de Montréal, Montreal, Canada
| | - Patricia N. Tonin
- Department of Human Genetics, McGill University, Montreal, Canada
- The Research Institute of the McGill University Health Centre, Montreal, Canada
- Department of Medicine, McGill University, Montreal, Canada
- * E-mail:
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9
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VanderWalde AM, Hurria A. Second malignancies among elderly survivors of cancer. Oncologist 2011; 16:1572-81. [PMID: 22042787 PMCID: PMC3233292 DOI: 10.1634/theoncologist.2011-0214] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2011] [Accepted: 08/29/2011] [Indexed: 12/18/2022] Open
Abstract
The U.S. population is aging, life expectancy is increasing, and cancer is a disease associated with aging. Advances in screening and therapeutics have led to a growing number of cancer survivors who are at risk for the development of secondary malignancies. Although the risks for the development of second malignancies following a first diagnosis of cancer are well described for survivors of childhood malignancies, there are fewer data for malignancies common in older adults. With the aging of the U.S. population, and with improving survival statistics in many adult malignancies, there is an increasing need to identify those second malignancies that might develop in the older adult survivor of cancer. In this paper, we describe the types and rates of second malignancies following cancers commonly seen in older adults and review the literature on these malignancies. Comparisons are made between older and younger adults with regard to the risks for developing treatment-related cancers with different modalities. Recommendations for early detection of second malignancies are summarized, though there remains an unmet need for evidence-based guidelines for screening for second malignancies in the older adult in particular.
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Affiliation(s)
- Ari M VanderWalde
- Department of Hematology and Hematopoietic Cell Transplantation, City of Hope Comprehensive Cancer Center, Duarte, California 91010, USA.
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10
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Analysis of gene expression in stage I serous tumors identifies critical pathways altered in ovarian cancer. Gynecol Oncol 2009; 114:3-11. [PMID: 19410283 DOI: 10.1016/j.ygyno.2009.04.002] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2009] [Revised: 03/26/2009] [Accepted: 04/02/2009] [Indexed: 01/22/2023]
Abstract
OBJECTIVE Despite recent advances in the conceptual understanding of the pathogenesis of ovarian cancer, it remains the foremost cause of death from gynecologic malignancies in developed countries. The main reason for such a high rate of mortality is the lack of sensitive and specific biomarkers and imaging techniques for early detection of ovarian cancer. Additional biological insights into early-stage ovarian carcinogenesis are needed to help speed the development of markers for early detection of ovarian cancer. The objective of this study was to characterize differentially expressed genes in high-grade stage I serous carcinoma of the ovary. METHODS We analyzed gene expression in macrodissected formalin-fixed, paraffin-embedded samples from 5 high-grade stage I serous carcinomas and 5 stage I borderline tumors of the ovary using the Illumina Whole Genome DASL assay (cDNA-mediated annealing, selection, extension, and ligation) corresponding to 24,000 genes. Significance Analysis of Microarrays was performed to determine differentially expressed genes in stage I serous carcinoma, and class prediction analysis was performed to determine the predictive value of differentially expressed gene sets to correctly classify serous carcinoma from borderline tumors in 3 independent data sets. Altered transcription factor pathways and biological pathways unique to stage I serous carcinoma were identified through class comparison of differentially expressed genes. RESULTS Unsupervised cluster analysis of gene expression correctly classified stage I serous carcinomas from serous borderline tumors. Supervised analysis identified several known, as well as novel, genes differentially expressed in stage I ovarian cancer. Using a differentially expressed gene set, class comparison prediction analysis correctly identified serous carcinomas from serous borderline tumors in 3 independent data sets at over 80% accuracy, sensitivity, and specificity. Pathway analysis demonstrated the significance of p53 and E2F pathways in serous carcinogenesis and significant involvements of cell cycle and immune response pathways in stage I serous epithelial ovarian cancer. CONCLUSION We have identified differentially expressed genes associated with the carcinogenesis of high-grade stage I serous EOC. Furthermore, integrative analysis of biological and transcription pathway data contributed to the confirmation of important biological pathways and discovery of additional unique genes and pathways that may have potential importance in ovarian pathogenesis and biomarker development.
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Vitaliani R, Spinazzi M, Del Mistro AR, Manara R, Tavolato B, Bonifati DM. Subacute onset of deafness and vertigo in a patient with leptomeningeal metastasis from ovarian cancer. Neurol Sci 2009; 30:65-7. [DOI: 10.1007/s10072-008-0006-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2008] [Accepted: 11/07/2008] [Indexed: 10/21/2022]
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Affiliation(s)
- Mary Clouser
- Division of Women's Cancers, Arizona Cancer Center, The University of Arizona, Tucson, AZ, USA
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13
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Swisher EM, Sakai W, Karlan BY, Wurz K, Urban N, Taniguchi T. Secondary BRCA1 mutations in BRCA1-mutated ovarian carcinomas with platinum resistance. Cancer Res 2008; 68:2581-6. [PMID: 18413725 DOI: 10.1158/0008-5472.can-08-0088] [Citation(s) in RCA: 373] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Although ovarian carcinomas with mutated BRCA1 or BRCA2 are sensitive to platinum compounds, such carcinomas eventually develop platinum resistance. Previously, we showed that acquired resistance to cisplatin in BRCA2-mutated tumors can be mediated by secondary intragenic mutations in BRCA2 that restore the wild-type BRCA2 reading frame. Here, we show that secondary mutations of BRCA1 also occur in BRCA1-mutated ovarian cancer with platinum resistance. We evaluated nine recurrent BRCA1-mutated ovarian cancers previously treated with platinum compounds, including five with acquired platinum resistance, one with primary platinum resistance, and three with platinum sensitivity. Four of the six recurrent platinum-resistant tumors had developed secondary genetic changes in BRCA1 that restored the reading frame of the BRCA1 protein, whereas none of the three platinum-sensitive recurrent tumors developed BRCA1 sequence alterations. We immunohistochemically confirmed restored expression of BRCA1 protein in two cases with secondary mutations. Intriguingly, the case with primary platinum resistance showed back mutation of BRCA1 in the primary tumor and showed another secondary mutation in the recurrent tumor. Our results suggest that secondary mutations in BRCA1 can mediate resistance to platinum in BRCA1-mutated ovarian tumors.
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Affiliation(s)
- Elizabeth M Swisher
- Department of Obstetrics and Gynecology, University of Washington, Seattle, Washington, USA
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14
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Sakai W, Swisher EM, Karlan BY, Agarwal MK, Higgins J, Friedman C, Villegas E, Jacquemont C, Farrugia DJ, Couch FJ, Urban N, Taniguchi T. Secondary mutations as a mechanism of cisplatin resistance in BRCA2-mutated cancers. Nature 2008; 451:1116-20. [PMID: 18264087 DOI: 10.1038/nature06633] [Citation(s) in RCA: 812] [Impact Index Per Article: 50.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2007] [Accepted: 01/03/2008] [Indexed: 12/18/2022]
Abstract
Ovarian carcinomas with mutations in the tumour suppressor BRCA2 are particularly sensitive to platinum compounds. However, such carcinomas ultimately develop cisplatin resistance. The mechanism of that resistance is largely unknown. Here we show that acquired resistance to cisplatin can be mediated by secondary intragenic mutations in BRCA2 that restore the wild-type BRCA2 reading frame. First, in a cisplatin-resistant BRCA2-mutated breast-cancer cell line, HCC1428, a secondary genetic change in BRCA2 rescued BRCA2 function. Second, cisplatin selection of a BRCA2-mutated pancreatic cancer cell line, Capan-1 (refs 3, 4), led to five different secondary mutations that restored the wild-type BRCA2 reading frame. All clones with secondary mutations were resistant both to cisplatin and to a poly(ADP-ribose) polymerase (PARP) inhibitor (AG14361). Finally, we evaluated recurrent cancers from patients whose primary BRCA2-mutated ovarian carcinomas were treated with cisplatin. The recurrent tumour that acquired cisplatin resistance had undergone reversion of its BRCA2 mutation. Our results suggest that secondary mutations that restore the wild-type BRCA2 reading frame may be a major clinical mediator of acquired resistance to platinum-based chemotherapy.
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Affiliation(s)
- Wataru Sakai
- Division of Human Biology, Fred Hutchinson Cancer Research Center, Seattle, Washington 98109-1024, USA
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15
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Cai LY, Abe M, Izumi SI, Imura M, Yasugi T, Ushijima T. Identification of PRTFDC1 silencing and aberrant promoter methylation of GPR150, ITGA8 and HOXD11 in ovarian cancers. Life Sci 2007; 80:1458-65. [PMID: 17303177 DOI: 10.1016/j.lfs.2007.01.015] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2006] [Revised: 12/20/2006] [Accepted: 01/06/2007] [Indexed: 10/23/2022]
Abstract
Methylated promoter CpG islands (CGIs) can be used to find novel tumor-suppressor genes and disease markers. In this study, to identify promoter CGIs aberrantly methylated in human ovarian cancers, we performed a genome-wide screening for differentially methylated DNA fragments using methylation-sensitive-representational difference analysis (MS-RDA). MS-RDA isolated 185 DNA fragments specifically methylated in an ovarian cancer cell line (ES-2), compared with a normal human ovarian surface epithelial cell line (HOSE6-3), and 33 of them were derived from putative promoter CGIs. Ten ovarian cancer cell lines were analyzed by methylation-specific PCR, and seven (GPR150, LOC222171, PRTFDC1, LOC339210, ITGA8, C9orf64 and HOXD11) of the 33 CGIs were methylated in one or more of the cell lines. Their downstream genes were barely expressed in cell lines without unmethylated DNA molecules by quantitative reverse-transcription-PCR. Demethylation of methylated cell lines with 5-aza-2'-deoxycytidine restored expression of two genes (PRTFDC1 and C9orf64). In primary ovarian cancers, CGIs of GPR150 (in 4 of 15 cancers), ITGA8 (2/15), PRTFDC1 (1/15), and HOXD11 (1/15) were methylated. Silencing of PRTFDC1 was revealed here for the first time, and aberrant methylation of GPR150, ITGA8 and HOXD11 could be candidate tumor markers.
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Affiliation(s)
- Li-yi Cai
- Carcinogenesis Division, National Cancer Center Research Institute, Japan
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Thrall M, Gallion HH, Kryscio R, Kapali M, Armstrong DK, DeLoia JA. BRCA1 expression in a large series of sporadic ovarian carcinomas: a Gynecologic Oncology Group study. Int J Gynecol Cancer 2006; 16 Suppl 1:166-71. [PMID: 16515585 DOI: 10.1111/j.1525-1438.2006.00504.x] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
BRCA1 is a tumor suppressor gene that, when mutated, is associated with the development of hereditary ovarian cancer. A role for BRCA1 in the pathoetiology of sporadic ovarian epithelial cancer (OEC) development has been suggested, although spontaneous mutations of the BRCA1 gene in this disease are uncommon. Loss of gene function by epigenetic alteration is observed more commonly, while other means of gene inactivation have not been intensively investigated. We examined expression and localization of the BRCA1 gene product by immunohistochemistry and sought to clarify the relationship between protein expression and tumor stage, grade, histopathologic subtype, and outcome. Among 230 spontaneous OEC tumors, we found a statistically significant decrease in BRCA1 protein expression with advancing stages of OEC. There was no relationship between expression and tumor grade. There was a statistically significant relationship between the pathologic subtypes of OEC and BRCA1 expression. Minimal BRCA1 expression was protective for survival. These findings confirm a high rate of loss of BRCA1 protein expression in sporadic OEC and suggest a role of BRCA1 in the progression of sporadic ovarian carcinoma.
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Affiliation(s)
- M Thrall
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of Pittsburgh, Magee-Womens Research Institute, Pittsburgh, Pennsylvania 15213, USA
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Kerner R, Sabo E, Gershoni-Baruch R, Beck D, Ben-Izhak O. Expression of cell cycle regulatory proteins in ovaries prophylactically removed from Jewish Ashkenazi BRCA1 and BRCA2 mutation carriers: Correlation with histopathology. Gynecol Oncol 2005; 99:367-75. [PMID: 16051332 DOI: 10.1016/j.ygyno.2005.06.041] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2005] [Revised: 06/07/2005] [Accepted: 06/13/2005] [Indexed: 11/20/2022]
Abstract
OBJECTIVES Prophylactic oophorectomy in Ashkenazi Jewish women with BRCA mutations represents a unique opportunity to search for premalignant changes in ovaries. Reports on the presence of dysplastic lesions in these ovaries are contradictory. Our aim was to study the expression of cell cycle regulatory proteins--p53, Skp2, p27, Ki67, Bcl2 and p16--in correlation with histopathological changes. p16(INK4A) was not studied before in prophylactically removed ovaries. METHODS Ninety-four ovaries from 50 Ashkenazi Jewish BRCA carriers were compared with 42 ovaries removed for reasons unrelated to cancer and with 16 ovarian carcinomas. RESULTS Three (6%) patients from the high-risk group had an occult carcinoma. A significant association was found between BRCA-positive expression and the presence of atypical changes in the superficial ovarian epithelium (P = 0.014) as well as the presence of epithelial cortical clefts (P = 0.042). Expression of p53 in cortical inclusions was significantly higher in the BRCA-positive cases than in the benign control group (P = 0.03). The high-risk and the benign control group did not differ significantly by the expression of p16, BCL2, Ki67, p27 and SKP2 (P > 0.05). However, both groups significantly differed from the carcinoma group (P < 0.0001). A significant positive correlation was found between the expression of Ki67, and the grade of atypia in the high-risk group (R = 0.3, P = 0.01) and in the benign control group (R = 0.5, P = 0.02). CONCLUSIONS BRCA mutation carriers had more atypical changes in the superficial epithelium (P = 0.014) and more epithelial cortical clefts (P = 0.042) compared to the benign control group. The histopathology changes were not supported by significantly altered expressions of the proteins used in our study. Additional molecular studies could contribute to the disclosure of precancerous ovarian lesions.
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Affiliation(s)
- Ram Kerner
- Department of Obstetrics and Gynecology, Rabin Medical Center, Beilinson Campus, Petah Tiqva 49100, Israel.
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Tashiro H, Katabuchi H, Begum M, Li X, Nitta M, Ohtake H, Okamura H. Roles of luteinizing hormone/chorionic gonadotropin receptor in anchorage-dependent and -independent growth in human ovarian surface epithelial cell lines. Cancer Sci 2003; 94:953-9. [PMID: 14611671 PMCID: PMC11160306 DOI: 10.1111/j.1349-7006.2003.tb01384.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2003] [Revised: 09/18/2003] [Accepted: 09/22/2003] [Indexed: 11/30/2022] Open
Abstract
Epithelial ovarian carcinomas are thought to arise from cells of ovarian surface epithelium (OSE) covering the free surface of the human ovary. Two immortalized human cell lines, OSE2a (non-tumorigenic) and OSE2b-2 (tumorigenic), were previously established from normal OSE cells of a reproductive-age patient. In the present study, we found that expression of luteinizing hormone (LH)/chorionic gonadotropin (CG) receptor (LH/CGR) is present in OSE2a cells and absent in OSE2b-2 cells. In OSE2a cells, a low concentration (10(3) mIU/ml) of CG enhanced anchorage-dependent growth via up-regulation of insulin-like growth factor-1 (IGF1), whereas a high concentration (10(5) mIU/ml) of CG induced anchorage-independent growth and down-regulation of IGF1 expression. To investigate involvement of other genes in LH/CGR-related tumorigenicity, we compared cDNA expression arrays of OSE2a and OSE2b-2 cells, and found that the following genes had lower expression in OSE2b-2 than in OSE2a: integrin beta 1, intercellular adhesion molecule-1 (ICAM1), and Waf1/Cip1. Subsequent semiquantitative reverse transcription polymerase chain reaction using OSE2a cells showed that expression of integrin beta 1 was down-regulated by a high concentration (10(5) mIU/ml) of CG. These results suggest that LH/CGR affects anchorage-dependent and -independent growth by mediating up- and down-regulation of IGF1 and integrin beta 1. Repetitive and excessive activation of LH/CGR may cause genetic alteration of its signal transduction pathway, resulting in stimulation of growth of OSE cells, initiation of ovarian carcinogenesis, and cancer progression.
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Affiliation(s)
- Hironori Tashiro
- Department of Obstetrics and Gynecology, Kumamoto University School of Medicine, Kumumoto City, Kumamoto 860-8556
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Jazaeri AA, Yee CJ, Sotiriou C, Brantley KR, Boyd J, Liu ET. Gene expression profiles of BRCA1-linked, BRCA2-linked, and sporadic ovarian cancers. J Natl Cancer Inst 2002; 94:990-1000. [PMID: 12096084 DOI: 10.1093/jnci/94.13.990] [Citation(s) in RCA: 194] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
BACKGROUND Germline mutations in BRCA1 and BRCA2 are responsible for 5%-10% of epithelial ovarian cancers, but the molecular pathways affected by these mutations are unknown. We used complementary DNA (cDNA) microarrays to compare gene expression patterns in ovarian cancers associated with BRCA1 or BRCA2 mutations with gene expression patterns in sporadic epithelial ovarian cancers and to identify patterns common to both hereditary and sporadic tumors. METHODS Tumor samples from 61 patients with pathologically confirmed epithelial ovarian adenocarcinoma with matched clinicopathologic features were studied, including 18 with BRCA1 founder mutations, 16 with BRCA2 founder mutations, and 27 without either founder mutation (termed sporadic cancers). The cDNA microarrays contained 7651 sequence-verified features. Gene expression data were analyzed with a modified two-sided F test, with P<.0001 considered statistically significant. The expression level of six genes was also studied with reverse transcription-polymerase chain reaction. RESULTS The greatest contrast in gene expression was observed between tumors with BRCA1 mutations and those with BRCA2 mutations; 110 genes showed statistically significantly different expression levels (P<.0001). This group of genes could segregate sporadic tumors into two subgroups, "BRCA1-like" and "BRCA2-like," suggesting that BRCA1-related and BRCA2-related pathways are also involved in sporadic ovarian cancers. Fifty-three genes were differentially expressed between tumors with BRCA1 mutations and sporadic tumors; six of the 53 mapped to Xp11.23 and were expressed at higher levels in tumors with BRCA1 mutations than in sporadic tumors. Compared with the immortalized ovarian surface epithelial cells used as reference, several interferon-inducible genes were overexpressed in the majority of tumors with a BRCA mutation and in sporadic tumors. CONCLUSIONS Mutations in BRCA1 and BRCA2 may lead to carcinogenesis through distinct molecular pathways that also appear to be involved in sporadic cancers. Sporadic carcinogenic pathways may result from epigenetic aberrations of BRCA1 and BRCA2 or their downstream effectors.
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MESH Headings
- Adenocarcinoma, Clear Cell/genetics
- Adenocarcinoma, Clear Cell/metabolism
- Adenocarcinoma, Mucinous/genetics
- Adenocarcinoma, Mucinous/metabolism
- Aged
- BRCA1 Protein/genetics
- BRCA2 Protein/genetics
- Carcinoma, Endometrioid/genetics
- Carcinoma, Endometrioid/metabolism
- Cystadenocarcinoma, Serous/genetics
- Cystadenocarcinoma, Serous/metabolism
- DNA Primers/chemistry
- Female
- Gene Expression Profiling
- Gene Expression Regulation, Neoplastic
- Genotype
- Germ-Line Mutation
- Humans
- Middle Aged
- Oligonucleotide Array Sequence Analysis
- Ovarian Neoplasms/genetics
- Ovarian Neoplasms/metabolism
- RNA, Messenger/analysis
- RNA, Messenger/genetics
- RNA, Neoplasm/analysis
- Reverse Transcriptase Polymerase Chain Reaction
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Affiliation(s)
- Amir A Jazaeri
- Division of Clinical Sciences of the National Cancer Institute, Gaithersburg, MD,USA
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Kolomainen DF, Larkin JMG, Badran M, A'Hern RP, King DM, Fisher C, Bridges JE, Blake PR, Barton DPJ, Shepherd JH, Kaye SB, Gore ME. Epithelial ovarian cancer metastasizing to the brain: a late manifestation of the disease with an increasing incidence. J Clin Oncol 2002; 20:982-6. [PMID: 11844820 DOI: 10.1200/jco.2002.20.4.982] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
PURPOSE We present the Royal Marsden Hospital experience of cerebral metastases from primary epithelial ovarian carcinoma (EOC) over the last 20 years and examine the evidence for an increasing incidence of EOC metastasizing to this site. PATIENTS AND METHODS A total of 3,690 women with EOC were seen at the Royal Marsden Hospital from 1980 to 2000. Eighteen of these patients developed cerebral metastases. RESULTS Median age at diagnosis of EOC was 52 years (range, 39 to 67). All patients received at least one line of platinum-based chemotherapy; 56% (10 of 18) received more than one line of treatment; 17% (three of 18), two lines; 11% (two of 18), three lines; and 28% (five of 18), four lines. The median treatment interval between each line of chemotherapy was 12, 18, and 4 months. The median interval between diagnosis and CNS relapse was 46 months (range, 12 to 113), in comparison with 5 and 7.5 months for hematogenous relapse in lung or liver, respectively (P <.001). The incidence of CNS metastases in our population from 1980 to 1984 was 0.2%; from 1985 to 1989, 0%; from 1990 to 1994, 0.3%; and from 1995 to 1999, 1.3% (P <.001). An analysis of data from the literature also suggests that the incidence of cerebral metastases from EOC has increased over time. CONCLUSION CNS metastases in EOC are a rare and late manifestation of the disease, occurring in patients with a prolonged survival caused by repeated chemosensitive relapses. An analysis of our data and the data from the literature suggests that the incidence of metastasis at this site in patients with EOC is increasing.
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