51
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Liu J, Wang HL, Ma FM, Guo HP, Fang NN, Wang SS, Li XH. Systematic module approach identifies altered genes and pathways in four types of ovarian cancer. Mol Med Rep 2017; 16:7907-7914. [PMID: 28983627 PMCID: PMC5779873 DOI: 10.3892/mmr.2017.7649] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Accepted: 01/09/2017] [Indexed: 12/24/2022] Open
Abstract
The present study aimed to identify altered genes and pathways associated with four histotypes of ovarian cancer, according to the systematic tracking of dysregulated modules of reweighted protein-protein interaction (PPI) networks. Firstly, the PPI network and gene expression data were initially integrated to infer and reweight normal ovarian and four types of ovarian cancer (endometrioid, serous, mucinous and clear cell carcinoma) PPI networks based on Spearman's correlation coefficient. Secondly, modules in the PPI network were mined using a clique-merging algorithm and the differential modules were identified through maximum weight bipartite matching. Finally, the gene compositions in the altered modules were analyzed, and pathway functional enrichment analyses for disrupted module genes were performed. In five conditional-specific networks, universal alterations in gene correlations were revealed, which leads to the differential correlation density among disrupted module pairs. The analyses revealed 28, 133, 139 and 33 altered modules in endometrioid, serous, mucinous and clear cell carcinoma, respectively. Gene composition analyses of the disrupted modules revealed five common genes (mitogen-activated protein kinase 1, phosphoinositide 3-kinase-encoding catalytic 110-KDα, AKT serine/threonine kinase 1, cyclin D1 and tumor protein P53) across the four subtypes of ovarian cancer. In addition, pathway enrichment analysis confirmed one common pathway (pathways in cancer), in the four histotypes. This systematic module approach successfully identified altered genes and pathways in the four types of ovarian cancer. The extensive differences of gene correlations result in dysfunctional modules, and the coordinated disruption of these modules contributes to the development and progression of ovarian cancer.
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Affiliation(s)
- Jing Liu
- Physical Examination Center, People's Hospital of Binzhou, Binzhou, Shandong 256610, P.R. China
| | - Hui-Ling Wang
- Department of Gynecology, People's Hospital of Binzhou, Binzhou, Shandong 256610, P.R. China
| | - Feng-Mei Ma
- Department of Infectious Disease, People's Hospital of Binzhou, Binzhou, Shandong 256610, P.R. China
| | - Hong-Ping Guo
- Physical Examination Center, People's Hospital of Binzhou, Binzhou, Shandong 256610, P.R. China
| | - Ning-Ning Fang
- Intensive Care Unit, People's Hospital of Binzhou, Binzhou, Shandong 256610, P.R. China
| | - Shan-Shan Wang
- Department of Obstetrics, People's Hospital of Binzhou, Binzhou, Shandong 256610, P.R. China
| | - Xin-Hong Li
- Department of Internal Medicine, Jinan Central Hospital, Jinan, Shandong 250013, P.R. China
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52
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Cochrane DR, Tessier-Cloutier B, Lawrence KM, Nazeran T, Karnezis AN, Salamanca C, Cheng AS, McAlpine JN, Hoang LN, Gilks CB, Huntsman DG. Clear cell and endometrioid carcinomas: are their differences attributable to distinct cells of origin? J Pathol 2017; 243:26-36. [PMID: 28678427 DOI: 10.1002/path.4934] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2017] [Revised: 06/09/2017] [Accepted: 06/29/2017] [Indexed: 01/18/2023]
Abstract
Endometrial epithelium is the presumed tissue of origin for both eutopic and endometriosis-derived clear cell and endometrioid carcinomas. We had previously hypothesized that the morphological, biological and clinical differences between these carcinomas are due to histotype-specific mutations. Although some mutations and genomic landscape features are more likely to be found in one of these histotypes, we were not able to identify a single class of mutations that was exclusively present in one histotype and not the other. This lack of genomic differences led us to an alternative hypothesis that these cancers could arise from distinct cells of origin within endometrial tissue, and that it is the cellular context that accounts for their differences. In a proteomic screen, we identified cystathionine γ-lyase (CTH) as a marker for clear cell carcinoma, as it is expressed at high levels in clear cell carcinomas of the ovary and endometrium. In the current study, we analysed normal Müllerian tissues, and found that CTH is expressed in ciliated cells of endometrium (both eutopic endometrium and endometriosis) and fallopian tubes. We then demonstrated that other ciliated cell markers are expressed in clear cell carcinomas, whereas endometrial secretory cell markers are expressed in endometrioid carcinomas. The same differential staining of secretory and ciliated cells was demonstrable in a three-dimensional organoid culture system, in which stem cells were stimulated to differentiate into an admixture of secretory and ciliated cells. These data suggest that endometrioid carcinomas are derived from cells of the secretory cell lineage, whereas clear cell carcinomas are derived from, or have similarities to, cells of the ciliated cell lineage. Copyright © 2017 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
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Affiliation(s)
- Dawn R Cochrane
- Department of Molecular Oncology, BC Cancer Agency, Vancouver, BC, Canada
| | - Basile Tessier-Cloutier
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC, Canada
| | | | - Tayyebeh Nazeran
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Anthony N Karnezis
- Department of Molecular Oncology, BC Cancer Agency, Vancouver, BC, Canada.,Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Clara Salamanca
- Department of Molecular Oncology, BC Cancer Agency, Vancouver, BC, Canada
| | - Angela S Cheng
- Department of Molecular Oncology, BC Cancer Agency, Vancouver, BC, Canada
| | - Jessica N McAlpine
- Department of Gynecology and Obstetrics, University of British Columbia, Vancouver, BC, Canada
| | - Lien N Hoang
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC, Canada.,Department of Anatomical Pathology, Vancouver General Hospital, Vancouver, BC, Canada
| | - C Blake Gilks
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC, Canada.,Department of Anatomical Pathology, Vancouver General Hospital, Vancouver, BC, Canada
| | - David G Huntsman
- Department of Molecular Oncology, BC Cancer Agency, Vancouver, BC, Canada.,Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC, Canada.,Department of Gynecology and Obstetrics, University of British Columbia, Vancouver, BC, Canada.,Department of Anatomical Pathology, Vancouver General Hospital, Vancouver, BC, Canada
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53
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Kamali M, Hamadani S, Neamatzadeh H, Mazaheri M, Zare Shehneh M, Modaress Gilani M, Haghighi F. Association of XRCC2 rs3218536 Polymorphism with Susceptibility of Breast and Ovarian Cancer: A Systematic Review and Meta-Analysis. Asian Pac J Cancer Prev 2017; 18:1743-1749. [PMID: 28749098 PMCID: PMC5648374 DOI: 10.22034/apjcp.2017.18.7.1743] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Background: Previous studies have investigated the association of X-Ray Repair Cross-Complementing Group
2 (XRCC2) rs3218536 polymorphism with breast and ovarian cancer. However, this association remains conflicting.
Therefore, we have performed the current systematic review and meta-analysis to clarify the association between
XRCC2 rs3218536 polymorphism with risk of breast and ovarian cancer. Methods: We conducted a search in
PubMed, Google Scholar and ISI Web of Science to select relevant studies on the association of XRCC2 rs3218536
polymorphism with breast and ovarian cancer susceptibility. We calculated the odds ratios (OR) and 95% confidence
intervals (CI) for five genetic contrasts. In addition, a stratified analysis was conducted cancer type, ethnicity and HWE
status. Results: A total of 17 studies with 5694 cases and 6450 controls for breast cancer and nine case-control studies
with 4464 cases and 6353 controls for ovarian cancer were identified for the analysis of the association with XRCC2
rs3218536 polymorphism. The pooled ORs revealed that XRCC2 rs3218536 polymorphism was associated with breast
cancer under the heterozygote contrast (AG vs. GG: OR = 0.929, 95% CI = 0.873-0.987, p=0.018) and ovarian cancer
under dominant contrast (AA+AG vs. GG: OR = 0.725, 95% CI = 0.537-0.979, p=0.036) in the overall population.
The stratified analysis indicated a significant association of XRCC2 rs3218536 polymorphism with breast and ovarian
cancer risk among Caucasians. Conclusion: Inconsistent with previous meta-analysis, this meta-analysis shows that the
XRCC2 rs3218536 polymorphism was associated with breast and ovarian cancer risk in overall population, especially
among Caucasians.
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Affiliation(s)
- Mahdieh Kamali
- Department of Perinatology, School of Medicine, Tehran University Medical
of Sciences, Tehran, Iran.,Maternal-Fetal and Neonatal Research Center, Tehran University Medical of Sciences, Tehran, Iran.
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54
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Toth R, Scherer D, Kelemen LE, Risch A, Hazra A, Balavarca Y, Issa JPJ, Moreno V, Eeles RA, Ogino S, Wu X, Ye Y, Hung RJ, Goode EL, Ulrich CM. Genetic Variants in Epigenetic Pathways and Risks of Multiple Cancers in the GAME-ON Consortium. Cancer Epidemiol Biomarkers Prev 2017; 26:816-825. [PMID: 28115406 PMCID: PMC6054308 DOI: 10.1158/1055-9965.epi-16-0728] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2016] [Revised: 12/16/2016] [Accepted: 12/19/2016] [Indexed: 11/16/2022] Open
Abstract
Background: Epigenetic disturbances are crucial in cancer initiation, potentially with pleiotropic effects, and may be influenced by the genetic background.Methods: In a subsets (ASSET) meta-analytic approach, we investigated associations of genetic variants related to epigenetic mechanisms with risks of breast, lung, colorectal, ovarian and prostate carcinomas using 51,724 cases and 52,001 controls. False discovery rate-corrected P values (q values < 0.05) were considered statistically significant.Results: Among 162,887 imputed or genotyped variants in 555 candidate genes, SNPs in eight genes were associated with risk of more than one cancer type. For example, variants in BABAM1 were confirmed as a susceptibility locus for squamous cell lung, overall breast, estrogen receptor (ER)-negative breast, and overall prostate, and overall serous ovarian cancer; the most significant variant was rs4808076 [OR = 1.14; 95% confidence interval (CI) = 1.10-1.19; q = 6.87 × 10-5]. DPF1 rs12611084 was inversely associated with ER-negative breast, endometrioid ovarian, and overall and aggressive prostate cancer risk (OR = 0.93; 95% CI = 0.91-0.96; q = 0.005). Variants in L3MBTL3 were associated with colorectal, overall breast, ER-negative breast, clear cell ovarian, and overall and aggressive prostate cancer risk (e.g., rs9388766: OR = 1.06; 95% CI = 1.03-1.08; q = 0.02). Variants in TET2 were significantly associated with overall breast, overall prostate, overall ovarian, and endometrioid ovarian cancer risk, with rs62331150 showing bidirectional effects. Analyses of subpathways did not reveal gene subsets that contributed disproportionately to susceptibility.Conclusions: Functional and correlative studies are now needed to elucidate the potential links between germline genotype, epigenetic function, and cancer etiology.Impact: This approach provides novel insight into possible pleiotropic effects of genes involved in epigenetic processes. Cancer Epidemiol Biomarkers Prev; 26(6); 816-25. ©2017 AACR.
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Affiliation(s)
- Reka Toth
- National Center for Tumor Diseases and German Cancer Research Center (DKFZ), Heidelberg, Germany
- Division of Epigenomics and Cancer Risk Factors, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Dominique Scherer
- National Center for Tumor Diseases and German Cancer Research Center (DKFZ), Heidelberg, Germany
- Institute of Medical Biometry and Informatics, University of Heidelberg, Heidelberg, Germany
| | - Linda E Kelemen
- Medical University of South Carolina and Hollings Cancer Center, Charleston, South Carolina
| | - Angela Risch
- Division of Epigenomics and Cancer Risk Factors, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Division of Cancer Research and Epigenetics, Department of Molecular Biology, University of Salzburg, Salzburg, Austria
- Cancer Cluster Salzburg, Salzburg, Austria
- Translational Lung Research Center Heidelberg (TLRC-H), Member of the German Center for Lung Research (DZL), Heidelberg, Germany
| | - Aditi Hazra
- Brigham and Women's Hospital, Harvard Medical School, Harvard T.H. Chan School of Public Health, Boston, Massachusetts
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Yesilda Balavarca
- National Center for Tumor Diseases and German Cancer Research Center (DKFZ), Heidelberg, Germany
| | | | - Victor Moreno
- Catalan Institute of Oncology, IDIBELL, L'Hospitalet de Llobregat, Barcelona, Catalonia, Spain
| | | | - Shuji Ogino
- Department of Pathology, Brigham and Women's Hospital, and Harvard Medical School, Boston, Massachusetts
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts
| | - Xifeng Wu
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Yuanqing Ye
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Rayjean J Hung
- Lunenfeld-Tanenbaum Research Institute of Mount Sinai Hospital, Toronto, Ontario, Canada
- University of Toronto, Toronto, Canada
| | - Ellen L Goode
- Mayo Clinic College of Medicine, Rochester, Minnesota
| | - Cornelia M Ulrich
- National Center for Tumor Diseases and German Cancer Research Center (DKFZ), Heidelberg, Germany.
- Fred Hutchinson Cancer Research Center, Seattle, Washington
- Huntsman Cancer Institute, Salt Lake City, Utah
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55
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Gupta I, Burney I, Al-Moundhri MS, Tamimi Y. Molecular genetics complexity impeding research progress in breast and ovarian cancers. Mol Clin Oncol 2017; 7:3-14. [PMID: 28685067 PMCID: PMC5492732 DOI: 10.3892/mco.2017.1275] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Accepted: 05/22/2017] [Indexed: 12/21/2022] Open
Abstract
Breast and ovarian cancer are heterogeneous diseases. While breast cancer accounts for 25% of cancers worldwide, ovarian cancer accounts for 3.5% of all cancers and it is considered to be the most lethal type of cancer among women. In Oman, breast cancer accounts for 25% and ovarian cancer for 4.5% of all cancer cases. Various risk factors, including variable biological and clinical traits, are involved in the onset of breast and ovarian cancer. Although highly developed diagnostic and therapeutic methods have paved the way for better management, targeted therapy against specific biomarkers has not yet shown any significant improvement, particularly in triple-negative breast cancer and epithelial ovarian cancer, which are associated with high mortality rates. Thus, elucidating the mechanisms underlying the pathology of these diseases is expected to improve their prevention, prognosis and management. The aim of the present study was to provide a comprehensive review and updated information on genomics and proteomics alterations associated with cancer pathogenesis, as reported by several research groups worldwide. Furthermore, molecular research in our laboratory, aimed at identifying new pathways involved in the pathogenesis of breast and ovarian cancer using microarray and chromatin immunoprecipitation (ChIP), is discussed. Relevant candidate genes were found to be either up- or downregulated in a cohort of breast cancer cases. Similarly, ChIP analysis revealed that relevant candidate genes were regulated by the E2F5 transcription factor in ovarian cancer tissue. An ongoing study aims to validate these genes with a putative role as biological markers that may contribute to the development of targeted therapies for breast and ovarian cancer.
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Affiliation(s)
- Ishita Gupta
- Department of Genetics, College of Medicine and Health Sciences, Sultan Qaboos University, Muscat, Sultanate of Oman
| | - Ikram Burney
- Department of Medicine, College of Medicine and Health Sciences, Sultan Qaboos University, Muscat, Sultanate of Oman
| | - Mansour S Al-Moundhri
- Department of Medicine, College of Medicine and Health Sciences, Sultan Qaboos University, Muscat, Sultanate of Oman
| | - Yahya Tamimi
- Department of Biochemistry, College of Medicine and Health Sciences, Sultan Qaboos University, Muscat, Sultanate of Oman
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56
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Etchegary H, Dicks E, Tamutis L, Dawson L. Quality of life following prophylactic gynecological surgery: experiences of female Lynch mutation carriers. Fam Cancer 2017; 17:53-61. [DOI: 10.1007/s10689-017-9997-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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57
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Reid BM, Permuth JB, Sellers TA. Epidemiology of ovarian cancer: a review. Cancer Biol Med 2017. [PMID: 28443200 DOI: 10.20892/j.issn.2095-3941.2016.0084]+[] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Ovarian cancer (OC) is the seventh most commonly diagnosed cancer among women in the world and the tenth most common in China. Epithelial OC is the most predominant pathologic subtype, with five major histotypes that differ in origination, pathogenesis, molecular alterations, risk factors, and prognosis. Genetic susceptibility is manifested by rare inherited mutations with high to moderate penetrance. Genome-wide association studies have additionally identified 29 common susceptibility alleles for OC, including 14 subtype-specific alleles. Several reproductive and hormonal factors may lower risk, including parity, oral contraceptive use, and lactation, while others such as older age at menopause and hormone replacement therapy confer increased risks. These associations differ by histotype, especially for mucinous OC, likely reflecting differences in etiology. Endometrioid and clear cell OC share a similar, unique pattern of associations with increased risks among women with endometriosis and decreased risks associated with tubal ligation. OC risks associated with other gynecological conditions and procedures, such as hysterectomy, pelvic inflammatory disease, and polycystic ovarian syndrome, are less clear. Other possible risk factors include environmental and lifestyle factors such as asbestos and talc powder exposures, and cigarette smoking. The epidemiology provides clues on etiology, primary prevention, early detection, and possibly even therapeutic strategies.
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Affiliation(s)
- Brett M Reid
- Department of Cancer Epidemiology, Division of Population Sciences, Moffitt Cancer Center, Tampa 33612, FL, USA
| | - Jennifer B Permuth
- Department of Cancer Epidemiology, Division of Population Sciences, Moffitt Cancer Center, Tampa 33612, FL, USA
| | - Thomas A Sellers
- Department of Cancer Epidemiology, Division of Population Sciences, Moffitt Cancer Center, Tampa 33612, FL, USA
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58
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Abstract
Ovarian cancer (OC) is the seventh most commonly diagnosed cancer among women in the world and the tenth most common in China. Epithelial OC is the most predominant pathologic subtype, with five major histotypes that differ in origination, pathogenesis, molecular alterations, risk factors, and prognosis. Genetic susceptibility is manifested by rare inherited mutations with high to moderate penetrance. Genome-wide association studies have additionally identified 29 common susceptibility alleles for OC, including 14 subtype-specific alleles. Several reproductive and hormonal factors may lower risk, including parity, oral contraceptive use, and lactation, while others such as older age at menopause and hormone replacement therapy confer increased risks. These associations differ by histotype, especially for mucinous OC, likely reflecting differences in etiology. Endometrioid and clear cell OC share a similar, unique pattern of associations with increased risks among women with endometriosis and decreased risks associated with tubal ligation. OC risks associated with other gynecological conditions and procedures, such as hysterectomy, pelvic inflammatory disease, and polycystic ovarian syndrome, are less clear. Other possible risk factors include environmental and lifestyle factors such as asbestos and talc powder exposures, and cigarette smoking. The epidemiology provides clues on etiology, primary prevention, early detection, and possibly even therapeutic strategies.
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Affiliation(s)
- Brett M Reid
- Department of Cancer Epidemiology, Division of Population Sciences, Moffitt Cancer Center, Tampa 33612, FL, USA
| | - Jennifer B Permuth
- Department of Cancer Epidemiology, Division of Population Sciences, Moffitt Cancer Center, Tampa 33612, FL, USA
| | - Thomas A Sellers
- Department of Cancer Epidemiology, Division of Population Sciences, Moffitt Cancer Center, Tampa 33612, FL, USA
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59
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Lavoué V, Rousselin A, Delplanque S, Pinsard M, Henno S, Foucher F, Levêque J, de la Motte Rouge T. [Can new molecular profiles in epithelial ovarian cancer modify therapeutics?]. J Gynecol Obstet Hum Reprod 2017; 46:107-112. [PMID: 28403964 DOI: 10.1016/j.jogoh.2016.09.002] [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: 05/05/2016] [Revised: 09/22/2016] [Accepted: 09/29/2016] [Indexed: 10/20/2022]
Abstract
Epithelial ovarian cancer (EOC) affects 4500 women a year in France, with a survival of 30% at 5 years. Treatment is based on extensive surgery and chemotherapy. Around 15% of EOCs are due to genetic mutation predisposition essentially with mutated BRCA1 and BRCA2 genes. Four histological subtypes are described (serous, endometrioid, and mucinous cells to clear), corresponding to different carcinogenesis and distinct molecular mutations. High-grade serous EOCs have a mutation of the BRCA genes in 20-30% of cases. This mutation causes a deficit of repair by homologous recombination of DNA in case of double strand break, allowing greater sensitivity to platinum salts and the use of PARP inhibitors, a protein involved in the repair of single-strand breaks of DNA. PARP inhibitors have shown efficacy in patients mutated BRCA but this effectiveness remains to be demonstrated in patients without congenital mutation, but with acquired BRCAness profile EOC. The BRCAness profile is defined by a tumor having a defect in DNA repair counterpart (not limited to BRCA mutation). Molecular definition of BRCAness is still not consensual but is necessary for the use of PARP inhibitors. Gene expression analyses have identified four subgroups of high-grade serous CEO: mesenchymal, proliferative, differentiated and immunoreactive. These four subtypes, not mutually exclusive, although correlated with prognosis, are not yet used in clinical routine.
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Affiliation(s)
- V Lavoué
- Service de chirurgie gynécologique, hôpital Sud, CHU de Rennes, 16, boulevard de Bulgarie, 35000 Rennes, France; Faculté de médecine, université de Rennes 1, 35000 Rennes, France; Inserm, Oncogenesis, Stress and Signaling, 35000 Rennes, France.
| | - A Rousselin
- Service de chirurgie gynécologique, hôpital Sud, CHU de Rennes, 16, boulevard de Bulgarie, 35000 Rennes, France; Faculté de médecine, université de Rennes 1, 35000 Rennes, France
| | - S Delplanque
- Service de chirurgie gynécologique, hôpital Sud, CHU de Rennes, 16, boulevard de Bulgarie, 35000 Rennes, France; Faculté de médecine, université de Rennes 1, 35000 Rennes, France
| | - M Pinsard
- Service de chirurgie gynécologique, hôpital Sud, CHU de Rennes, 16, boulevard de Bulgarie, 35000 Rennes, France; Faculté de médecine, université de Rennes 1, 35000 Rennes, France
| | - S Henno
- Inserm, Oncogenesis, Stress and Signaling, 35000 Rennes, France; Service d'anatomo-pathologie, CHU de Rennes, 35000 Rennes, France
| | - F Foucher
- Service de chirurgie gynécologique, hôpital Sud, CHU de Rennes, 16, boulevard de Bulgarie, 35000 Rennes, France
| | - J Levêque
- Service de chirurgie gynécologique, hôpital Sud, CHU de Rennes, 16, boulevard de Bulgarie, 35000 Rennes, France; Faculté de médecine, université de Rennes 1, 35000 Rennes, France; Inserm, Oncogenesis, Stress and Signaling, 35000 Rennes, France
| | - T de la Motte Rouge
- Inserm, Oncogenesis, Stress and Signaling, 35000 Rennes, France; Service d'oncologie médicale, CRLCC Eugène-Marquis, 35000 Rennes, France
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60
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Møller P, Seppälä T, Bernstein I, Holinski-Feder E, Sala P, Evans DG, Lindblom A, Macrae F, Blanco I, Sijmons R, Jeffries J, Vasen H, Burn J, Nakken S, Hovig E, Rødland EA, Tharmaratnam K, de Vos tot Nederveen Cappel WH, Hill J, Wijnen J, Green K, Lalloo F, Sunde L, Mints M, Bertario L, Pineda M, Navarro M, Morak M, Renkonen-Sinisalo L, Frayling IM, Plazzer JP, Pylvanainen K, Sampson JR, Capella G, Mecklin JP, Möslein G. Cancer incidence and survival in Lynch syndrome patients receiving colonoscopic and gynaecological surveillance: first report from the prospective Lynch syndrome database. Gut 2017; 66:464-472. [PMID: 26657901 PMCID: PMC5534760 DOI: 10.1136/gutjnl-2015-309675] [Citation(s) in RCA: 363] [Impact Index Per Article: 51.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2015] [Revised: 11/06/2015] [Accepted: 11/17/2015] [Indexed: 12/12/2022]
Abstract
OBJECTIVE Estimates of cancer risk and the effects of surveillance in Lynch syndrome have been subject to bias, partly through reliance on retrospective studies. We sought to establish more robust estimates in patients undergoing prospective cancer surveillance. DESIGN We undertook a multicentre study of patients carrying Lynch syndrome-associated mutations affecting MLH1, MSH2, MSH6 or PMS2. Standardised information on surveillance, cancers and outcomes were collated in an Oracle relational database and analysed by age, sex and mutated gene. RESULTS 1942 mutation carriers without previous cancer had follow-up including colonoscopic surveillance for 13 782 observation years. 314 patients developed cancer, mostly colorectal (n=151), endometrial (n=72) and ovarian (n=19). Cancers were detected from 25 years onwards in MLH1 and MSH2 mutation carriers, and from about 40 years in MSH6 and PMS2 carriers. Among first cancer detected in each patient the colorectal cancer cumulative incidences at 70 years by gene were 46%, 35%, 20% and 10% for MLH1, MSH2, MSH6 and PMS2 mutation carriers, respectively. The equivalent cumulative incidences for endometrial cancer were 34%, 51%, 49% and 24%; and for ovarian cancer 11%, 15%, 0% and 0%. Ten-year crude survival was 87% after any cancer, 91% if the first cancer was colorectal, 98% if endometrial and 89% if ovarian. CONCLUSIONS The four Lynch syndrome-associated genes had different penetrance and expression. Colorectal cancer occurred frequently despite colonoscopic surveillance but resulted in few deaths. Using our data, a website has been established at http://LScarisk.org enabling calculation of cumulative cancer risks as an aid to genetic counselling in Lynch syndrome.
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Affiliation(s)
- Pål Møller
- Research Group Inherited Cancer, Department of Medical Genetics, The Norwegian Radium Hospital, Oslo University Hospital, Oslo, Norway
| | - Toni Seppälä
- Department of Surgery, Central Finland Health Care District, Jyväskylä, Finland
| | - Inge Bernstein
- Danish HNPCC Register; Hvidovre University Hospital, Copenhagen, Denmark
- Department Surgical Gastroenterology, Aalborg University Hospital, Aalborg, Denmark
| | - Elke Holinski-Feder
- Medizinische Klinik und Poliklinik IV, Campus Innenstadt, Klinikum der Universität München, Ziemssenstr. 1, Munich, Germany
- MGZ—Medizinisch Genetisches Zentrum, Munich, Germany
| | - Paola Sala
- Unit of Hereditary Digestive Tract Tumors IRCCS Istituto Nazionale Tumori, Milan, Italy
| | - D Gareth Evans
- Manchester Centre for Genomic Medicine, Central Manchester University Hospitals NHS Foundation Trust, Manchester, UK
- Manchester Centre for Genomic Medicine, University of Manchester, Manchester, UK
| | - Annika Lindblom
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
| | - Finlay Macrae
- Colorectal Medicine and Genetics, The Royal Melbourne Hospital, Melbourne, Australia
- Department of Medicine, Melbourne University, Melbourne, Australia
| | - Ignacio Blanco
- Hereditary Cancer Program, Institut Català d'Oncologia-IDIBELL, L'Hospitalet de Llobregat, Barcelona, Spain
| | - Rolf Sijmons
- Department of Genetics, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Jacqueline Jeffries
- Institute of Medical Genetics, Cardiff University School of Medicine, Heath Park, Cardiff, UK
| | - Hans Vasen
- Department of Gastroenterology and Hepatology, Leiden University Medical Centre, Leiden, The Netherlands
| | - John Burn
- Institute of Genetic Medicine Newcastle University, Newcastle upon Tyne, UK
| | - Sigve Nakken
- Department of Tumor Biology, Institute of Cancer Research, The Norwegian Radium Hospital, part of Oslo University Hospital, Oslo, Norway
- Institute of Cancer Genetics and Informatics, The Norwegian Radium Hospital, part of Oslo University Hospital, Oslo, Norway
| | - Eivind Hovig
- Department of Tumor Biology, Institute of Cancer Research, The Norwegian Radium Hospital, part of Oslo University Hospital, Oslo, Norway
- Institute of Cancer Genetics and Informatics, The Norwegian Radium Hospital, part of Oslo University Hospital, Oslo, Norway
- Department of Informatics, University of Oslo, Oslo, Norway
| | - Einar Andreas Rødland
- Department of Tumor Biology, Institute of Cancer Research, The Norwegian Radium Hospital, part of Oslo University Hospital, Oslo, Norway
| | | | | | - James Hill
- Department of Surgery, Central Manchester University Hospitals NHS Foundation Trust and University of Manchester, Manchester, UK
| | - Juul Wijnen
- Department of Clinical Genetics and Department of Human Genetics Leiden University Medical Centre, Leiden, The Netherlands
| | - Kate Green
- Manchester Centre for Genomic Medicine, Central Manchester University Hospitals NHS Foundation Trust, Manchester, UK
| | - Fiona Lalloo
- Manchester Centre for Genomic Medicine, Central Manchester University Hospitals NHS Foundation Trust, Manchester, UK
| | - Lone Sunde
- Danish HNPCC Register; Hvidovre University Hospital, Copenhagen, Denmark
- Department of Clinical Genetics, Aarhus University Hospital, Aarhus, Denmark
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | - Miriam Mints
- Division of Obstetrics and Gynecology, Department of Women's and Children's health, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Lucio Bertario
- Unit of Hereditary Digestive Tract Tumors IRCCS Istituto Nazionale Tumori, Milan, Italy
| | - Marta Pineda
- Hereditary Cancer Program, Institut Català d'Oncologia-IDIBELL, L'Hospitalet de Llobregat, Barcelona, Spain
| | - Matilde Navarro
- Hereditary Cancer Program, Institut Català d'Oncologia-IDIBELL, L'Hospitalet de Llobregat, Barcelona, Spain
| | - Monika Morak
- Medizinische Klinik und Poliklinik IV, Campus Innenstadt, Klinikum der Universität München, Ziemssenstr. 1, Munich, Germany
- MGZ—Medizinisch Genetisches Zentrum, Munich, Germany
| | - Laura Renkonen-Sinisalo
- Department of Surgery, Helsinki University Hospital, Helsinki, Finland
- Genome-Scale Biology Research Program, University of Helsinki, Helsinki, Finland
| | - Ian M Frayling
- Institute of Medical Genetics, Cardiff University School of Medicine, Heath Park, Cardiff, UK
| | - John-Paul Plazzer
- Colorectal Medicine and Genetics, The Royal Melbourne Hospital, Melbourne, Australia
| | - Kirsi Pylvanainen
- Department of Education and Science, Central Finland Health Care District, Jyväskylä, Finland
| | - Julian R Sampson
- Institute of Medical Genetics, Cardiff University School of Medicine, Heath Park, Cardiff, UK
| | - Gabriel Capella
- Hereditary Cancer Program, Institut Català d'Oncologia-IDIBELL, L'Hospitalet de Llobregat, Barcelona, Spain
| | - Jukka-Pekka Mecklin
- Department of Education and Science, Central Finland Health Care District, Jyväskylä, Finland
- University of Eastern Finland, Jyväskylä, Finland
| | - Gabriela Möslein
- Department of Surgery, HELIOS St Josefs Hospital Bochum-Linden (Helios), Bochum, Germany
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Brandt S, Samartzis EP, Zimmermann AK, Fink D, Moch H, Noske A, Dedes KJ. Lack of MRE11-RAD50-NBS1 (MRN) complex detection occurs frequently in low-grade epithelial ovarian cancer. BMC Cancer 2017; 17:44. [PMID: 28073364 PMCID: PMC5223425 DOI: 10.1186/s12885-016-3026-2] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Accepted: 12/20/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND BRCA1/2-deficient ovarian carcinomas are recognized as target for Poly (ADP-ribose) polymerase (PARP) inhibitors. BRCA1 and BRCA2 proteins are involved in homologous recombination repair of double-strand DNA breaks. The relevance of other homologous recombination repair proteins, e.g. MRE11, RAD50, NBS1 (MRN complex) in ovarian carcinomas is unclear. The objective of this study was to investigate the prevalence of lack of MRE11, RAD50, NBS1 protein detection in epithelial ovarian cancer (EOC). METHODS A tissue microarray (TMA) with 134 EOC was immunohistochemically evaluated for MRE11, RAD50 and NBS1. Data was analysed for associations with clinicopathological parameters, histological subtype, patient overall survival and mismatch repair (MMR) protein status. Sensitivity towards the PARP inhibitor BMN673 was tested in two ovarian cancer cell lines (TOV-21 and OVTOKO) using colony formation assays. RESULTS Lack of MRN complex protein detection was seen in 41% (55/134) of EOC and was more frequent in low-grade (57.6%; 19/33) than in high-grade EOC (18.8%; 36/101; n = 134; p = 0.04). There was an association with the ovarian carcinoma subtype (60.3%; 35/58 lack of detection in type I versus 26.3%; 20/76 in type II; n = 134; p < 0.001) as well as undetectable DNA mismatch repair proteins MLH1 and MSH2 (89.3%; 25/28; n = 131; p < 0.001). MRE11 knockdown led to moderately increased sensitivity towards the PARP inhibitor BMN673 in one ovarian carcinoma cell line in vitro. CONCLUSIONS Frequent lack of MRE11, RAD50, NBS1 protein detection in type I human ovarian carcinomas is observed in EOC and our data suggests further investigation regarding sensitivity to PARP-inhibition in tumours lacking MRE11 expression.
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MESH Headings
- Acid Anhydride Hydrolases
- Adenocarcinoma, Clear Cell/drug therapy
- Adenocarcinoma, Clear Cell/metabolism
- Adenocarcinoma, Clear Cell/pathology
- Adenocarcinoma, Mucinous/drug therapy
- Adenocarcinoma, Mucinous/metabolism
- Adenocarcinoma, Mucinous/pathology
- Antineoplastic Combined Chemotherapy Protocols/therapeutic use
- Biomarkers, Tumor/metabolism
- Cell Cycle Proteins/metabolism
- Cystadenocarcinoma, Serous/drug therapy
- Cystadenocarcinoma, Serous/metabolism
- Cystadenocarcinoma, Serous/pathology
- DNA Repair Enzymes/metabolism
- DNA-Binding Proteins/metabolism
- Endometrial Neoplasms/drug therapy
- Endometrial Neoplasms/metabolism
- Endometrial Neoplasms/pathology
- Female
- Follow-Up Studies
- Humans
- MRE11 Homologue Protein
- Middle Aged
- Neoplasm Grading
- Neoplasm Recurrence, Local/drug therapy
- Neoplasm Recurrence, Local/metabolism
- Neoplasm Recurrence, Local/pathology
- Nuclear Proteins/metabolism
- Ovarian Neoplasms/drug therapy
- Ovarian Neoplasms/metabolism
- Ovarian Neoplasms/pathology
- Prognosis
- Survival Rate
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Affiliation(s)
- Simone Brandt
- Institute of Surgical Pathology, University Hospital Zurich, Zurich, Switzerland
| | | | | | - Daniel Fink
- Department of Gynecology, University Hospital Zurich, CH- 8091 Zurich, Switzerland
| | - Holger Moch
- Institute of Surgical Pathology, University Hospital Zurich, Zurich, Switzerland
| | - Aurelia Noske
- Institute of Surgical Pathology, University Hospital Zurich, Zurich, Switzerland
| | - Konstantin J. Dedes
- Department of Gynecology, University Hospital Zurich, CH- 8091 Zurich, Switzerland
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63
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Abstract
Ovarian cancer (OC) is the seventh most commonly diagnosed cancer among women in the world and the tenth most common in China. Epithelial OC is the most predominant pathologic subtype, with five major histotypes that differ in origination, pathogenesis, molecular alterations, risk factors, and prognosis. Genetic susceptibility is manifested by rare inherited mutations with high to moderate penetrance. Genome-wide association studies have additionally identified 29 common susceptibility alleles for OC, including 14 subtype-specific alleles. Several reproductive and hormonal factors may lower risk, including parity, oral contraceptive use, and lactation, while others such as older age at menopause and hormone replacement therapy confer increased risks. These associations differ by histotype, especially for mucinous OC, likely reflecting differences in etiology. Endometrioid and clear cell OC share a similar, unique pattern of associations with increased risks among women with endometriosis and decreased risks associated with tubal ligation. OC risks associated with other gynecological conditions and procedures, such as hysterectomy, pelvic inflammatory disease, and polycystic ovarian syndrome, are less clear. Other possible risk factors include environmental and lifestyle factors such as asbestos and talc powder exposures, and cigarette smoking. The epidemiology provides clues on etiology, primary prevention, early detection, and possibly even therapeutic strategies.
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Affiliation(s)
- Brett M Reid
- Department of Cancer Epidemiology, Division of Population Sciences, Moffitt Cancer Center, Tampa 33612, FL, USA
| | - Jennifer B Permuth
- Department of Cancer Epidemiology, Division of Population Sciences, Moffitt Cancer Center, Tampa 33612, FL, USA
| | - Thomas A Sellers
- Department of Cancer Epidemiology, Division of Population Sciences, Moffitt Cancer Center, Tampa 33612, FL, USA
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Sheffield BS, Hirsch-Reinshagen V, Schrader KA. How to Screen for Hereditary Cancers in General Pathology Practice. Arch Pathol Lab Med 2016; 140:899-909. [PMID: 27575265 DOI: 10.5858/arpa.2015-0457-ra] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
CONTEXT -As a pathologist, an awareness of the particular diagnoses that can serve as "sentinels" for an underlying genetic syndrome can be incredibly beneficial to patients and their families. This is a complex and ever-changing field of medicine, where remaining up to date with diagnostic and treatment options is challenging. Simply raising the possibility of an underlying syndrome may not, in itself, be diagnostic; however, this may present an opportunity for genetic assessment, and possibly early intervention or primary prevention of disease in the kindred. In the last decade, immunohistochemistry has emerged as a useful tool in hereditary cancer screening. This is best exemplified by the use of mismatch repair immunohistochemistry as a screening tool in colorectal and endometrioid carcinomas. Reflex testing of all tumors for deficiencies in these proteins is now resulting in superior identification and treatment of Lynch-associated cancers, and families harboring these syndromes. Despite the success and potential value of immunohistochemistry as a genetic screening tool, hematoxylin-eosin morphology remains a valuable tool for hereditary cancer screening and is the focus of this article. OBJECTIVE -To highlight the utility of hematoxylin-eosin morphology as a valuable tool for hereditary cancer screening. DATA SOURCES -Primary literature review with PubMed. CONCLUSIONS -Recognition of tumors associated with cancer predisposition may identify individuals and families at high risk for cancer and may also have peridiagnostic utility with regard to implications for targeted therapy.
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Affiliation(s)
| | | | - Kasmintan A Schrader
- From the Departments of Laboratory Medicine and Pathology (Drs Sheffield and Hirsch-Reinshagen) and Medical Genetics (Dr Schrader), University of British Columbia, Vancouver, British Columbia, Canada
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65
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Abstract
Epithelial ovarian cancer represents the most lethal gynecological malignancy in the developed world, and can be divided into five main histological subtypes: high grade serous, endometrioid, clear cell, mucinous and low grade serous. These subtypes represent distinct disease entities, both clinically and at the molecular level. Molecular analysis has revealed significant genetic heterogeneity in ovarian cancer, particularly within the high grade serous subtype. As such, this subtype has been the focus of much research effort to date, revealing molecular subgroups at both the genomic and transcriptomic level that have clinical implications. However, stratification of ovarian cancer patients based on the underlying biology of their disease remains in its infancy. Here, we summarize the molecular changes that characterize the five main ovarian cancer subtypes, highlight potential opportunities for targeted therapeutic intervention and outline priorities for future research.
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Affiliation(s)
- Robert L Hollis
- Edinburgh Cancer Research UK Centre, MRC Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, EH4 2XR, UK
| | - Charlie Gourley
- Edinburgh Cancer Research UK Centre, MRC Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, EH4 2XR, UK
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Ikeda Y, Kiyotani K, Yew PY, Kato T, Tamura K, Yap KL, Nielsen SM, Mester JL, Eng C, Nakamura Y, Grogan RH. Germline PARP4 mutations in patients with primary thyroid and breast cancers. Endocr Relat Cancer 2016; 23:171-9. [PMID: 26699384 PMCID: PMC5152685 DOI: 10.1530/erc-15-0359] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 12/23/2015] [Indexed: 12/20/2022]
Abstract
Germline mutations in the PTEN gene, which cause Cowden syndrome, are known to be one of the genetic factors for primary thyroid and breast cancers; however, PTEN mutations are found in only a small subset of research participants with non-syndrome breast and thyroid cancers. In this study, we aimed to identify germline variants that may be related to genetic risk of primary thyroid and breast cancers. Genomic DNAs extracted from peripheral blood of 14 PTEN WT female research participants with primary thyroid and breast cancers were analyzed by whole-exome sequencing. Gene-based case-control association analysis using the information of 406 Europeans obtained from the 1000 Genomes Project database identified 34 genes possibly associated with the phenotype with P < 1.0 × 10(-3). Among them, rare variants in the PARP4 gene were detected at significant high frequency (odds ratio = 5.2; P = 1.0 × 10(-5)). The variants, G496V and T1170I, were found in six of the 14 study participants (43%) while their frequencies were only 0.5% in controls. Functional analysis using HCC1143 cell line showed that knockdown of PARP4 with siRNA significantly enhanced the cell proliferation, compared with the cells transfected with siControl (P = 0.02). Kaplan-Meier analysis using Gene Expression Omnibus (GEO), European Genome-phenome Archive (EGA) and The Cancer Genome Atlas (TCGA) datasets showed poor relapse-free survival (P < 0.001, Hazard ratio 1.27) and overall survival (P = 0.006, Hazard ratio 1.41) in a PARP4 low-expression group, suggesting that PARP4 may function as a tumor suppressor. In conclusion, we identified PARP4 as a possible susceptibility gene of primary thyroid and breast cancer.
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Affiliation(s)
- Yuji Ikeda
- Section of Hematology/OncologyDepartment of Medicine, The University of Chicago, Chicago, Illinois 60637, USAGenomic Medicine InstituteCleveland Clinic, Cleveland, Ohio 44195, USADepartment of Genetics and Genome SciencesComprehensive Cancer Center, Case Western Reserve University School of Medicine, Cleveland, Ohio 44106, USAEndocrine Surgery Research ProgramSection of General Surgery, Department of Surgery, The University of Chicago, 5841 S Maryland Avenue, Chicago, Illinois 60637, USA
| | - Kazuma Kiyotani
- Section of Hematology/OncologyDepartment of Medicine, The University of Chicago, Chicago, Illinois 60637, USAGenomic Medicine InstituteCleveland Clinic, Cleveland, Ohio 44195, USADepartment of Genetics and Genome SciencesComprehensive Cancer Center, Case Western Reserve University School of Medicine, Cleveland, Ohio 44106, USAEndocrine Surgery Research ProgramSection of General Surgery, Department of Surgery, The University of Chicago, 5841 S Maryland Avenue, Chicago, Illinois 60637, USA
| | - Poh Yin Yew
- Section of Hematology/OncologyDepartment of Medicine, The University of Chicago, Chicago, Illinois 60637, USAGenomic Medicine InstituteCleveland Clinic, Cleveland, Ohio 44195, USADepartment of Genetics and Genome SciencesComprehensive Cancer Center, Case Western Reserve University School of Medicine, Cleveland, Ohio 44106, USAEndocrine Surgery Research ProgramSection of General Surgery, Department of Surgery, The University of Chicago, 5841 S Maryland Avenue, Chicago, Illinois 60637, USA
| | - Taigo Kato
- Section of Hematology/OncologyDepartment of Medicine, The University of Chicago, Chicago, Illinois 60637, USAGenomic Medicine InstituteCleveland Clinic, Cleveland, Ohio 44195, USADepartment of Genetics and Genome SciencesComprehensive Cancer Center, Case Western Reserve University School of Medicine, Cleveland, Ohio 44106, USAEndocrine Surgery Research ProgramSection of General Surgery, Department of Surgery, The University of Chicago, 5841 S Maryland Avenue, Chicago, Illinois 60637, USA
| | - Kenji Tamura
- Section of Hematology/OncologyDepartment of Medicine, The University of Chicago, Chicago, Illinois 60637, USAGenomic Medicine InstituteCleveland Clinic, Cleveland, Ohio 44195, USADepartment of Genetics and Genome SciencesComprehensive Cancer Center, Case Western Reserve University School of Medicine, Cleveland, Ohio 44106, USAEndocrine Surgery Research ProgramSection of General Surgery, Department of Surgery, The University of Chicago, 5841 S Maryland Avenue, Chicago, Illinois 60637, USA
| | - Kai Lee Yap
- Section of Hematology/OncologyDepartment of Medicine, The University of Chicago, Chicago, Illinois 60637, USAGenomic Medicine InstituteCleveland Clinic, Cleveland, Ohio 44195, USADepartment of Genetics and Genome SciencesComprehensive Cancer Center, Case Western Reserve University School of Medicine, Cleveland, Ohio 44106, USAEndocrine Surgery Research ProgramSection of General Surgery, Department of Surgery, The University of Chicago, 5841 S Maryland Avenue, Chicago, Illinois 60637, USA
| | - Sarah M Nielsen
- Section of Hematology/OncologyDepartment of Medicine, The University of Chicago, Chicago, Illinois 60637, USAGenomic Medicine InstituteCleveland Clinic, Cleveland, Ohio 44195, USADepartment of Genetics and Genome SciencesComprehensive Cancer Center, Case Western Reserve University School of Medicine, Cleveland, Ohio 44106, USAEndocrine Surgery Research ProgramSection of General Surgery, Department of Surgery, The University of Chicago, 5841 S Maryland Avenue, Chicago, Illinois 60637, USA
| | - Jessica L Mester
- Section of Hematology/OncologyDepartment of Medicine, The University of Chicago, Chicago, Illinois 60637, USAGenomic Medicine InstituteCleveland Clinic, Cleveland, Ohio 44195, USADepartment of Genetics and Genome SciencesComprehensive Cancer Center, Case Western Reserve University School of Medicine, Cleveland, Ohio 44106, USAEndocrine Surgery Research ProgramSection of General Surgery, Department of Surgery, The University of Chicago, 5841 S Maryland Avenue, Chicago, Illinois 60637, USA
| | - Charis Eng
- Section of Hematology/OncologyDepartment of Medicine, The University of Chicago, Chicago, Illinois 60637, USAGenomic Medicine InstituteCleveland Clinic, Cleveland, Ohio 44195, USADepartment of Genetics and Genome SciencesComprehensive Cancer Center, Case Western Reserve University School of Medicine, Cleveland, Ohio 44106, USAEndocrine Surgery Research ProgramSection of General Surgery, Department of Surgery, The University of Chicago, 5841 S Maryland Avenue, Chicago, Illinois 60637, USA Section of Hematology/OncologyDepartment of Medicine, The University of Chicago, Chicago, Illinois 60637, USAGenomic Medicine InstituteCleveland Clinic, Cleveland, Ohio 44195, USADepartment of Genetics and Genome SciencesComprehensive Cancer Center, Case Western Reserve University School of Medicine, Cleveland, Ohio 44106, USAEndocrine Surgery Research ProgramSection of General Surgery, Department of Surgery, The University of Chicago, 5841 S Maryland Avenue, Chicago, Illinois 60637, USA
| | - Yusuke Nakamura
- Section of Hematology/OncologyDepartment of Medicine, The University of Chicago, Chicago, Illinois 60637, USAGenomic Medicine InstituteCleveland Clinic, Cleveland, Ohio 44195, USADepartment of Genetics and Genome SciencesComprehensive Cancer Center, Case Western Reserve University School of Medicine, Cleveland, Ohio 44106, USAEndocrine Surgery Research ProgramSection of General Surgery, Department of Surgery, The University of Chicago, 5841 S Maryland Avenue, Chicago, Illinois 60637, USA
| | - Raymon H Grogan
- Section of Hematology/OncologyDepartment of Medicine, The University of Chicago, Chicago, Illinois 60637, USAGenomic Medicine InstituteCleveland Clinic, Cleveland, Ohio 44195, USADepartment of Genetics and Genome SciencesComprehensive Cancer Center, Case Western Reserve University School of Medicine, Cleveland, Ohio 44106, USAEndocrine Surgery Research ProgramSection of General Surgery, Department of Surgery, The University of Chicago, 5841 S Maryland Avenue, Chicago, Illinois 60637, USA
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Rambau PF, Duggan MA, Ghatage P, Warfa K, Steed H, Perrier R, Kelemen LE, Köbel M. Significant frequency of MSH2/MSH6 abnormality in ovarian endometrioid carcinoma supports histotype-specific Lynch syndrome screening in ovarian carcinomas. Histopathology 2016; 69:288-97. [PMID: 26799366 DOI: 10.1111/his.12934] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2015] [Accepted: 01/16/2016] [Indexed: 02/06/2023]
Abstract
AIMS Lynch syndrome screening in ovarian carcinoma is controversial. The aim of this study was to assess the frequency of deficient mismatch repair (dMMR) protein in a retrospective cohort enriched for non-high-grade serous carcinomas and its association with outcome within histological types. METHODS AND RESULTS Tissue microarrays representing 612 ovarian carcinomas were tested for mismatch repair proteins (MLH1, PMS2, MSH2, and MSH6) by immunohistochemistry. dMMR was detected in 13.8% of endometrioid and 2.4% of clear cell carcinomas, but not in other histological types. Within endometrioid carcinomas, 11 of 25 dMMR cases showed abnormal MLH1/PMS2, 10 cases showed abnormal MSH2/MSH6, and four cases showed only abnormal MSH6, indicating that at least 7.7% of endometrioid carcinomas have dMMR probably related to Lynch syndrome. The four dMMR clear cell carcinomas showed abnormal MSH2/MSH6 in three cases and only abnormal MSH6 in one case, all probably related to Lynch syndrome. Within endometrioid carcinomas, dMMR was significantly associated with age <50 years, synchronous endometrial endometrioid carcinoma, a higher CA125 level at diagnosis, higher FIGO grade, absence of ARID1A, and at least 20 CD8-positive intraepithelial lymphocytes per high-power field, but was not associated with cancer-specific death. Age <50 years, higher CA125 levels at diagnosis and at least 20 CD8-positive intraepithelial lymphocytes per high-power field remained significant after adjustment for multiple testing, but their sensitivity for identifying dMMR remained insufficient. CONCLUSION Our data support the policy of histotype-specific Lynch syndrome screening in ovarian carcinoma confined to endometrioid and clear cell carcinomas.
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Affiliation(s)
- Peter F Rambau
- Department of Pathology, Catholic University of Health and Allied Sciences-Bugando, Mwanza, Tanzania.,Department of Pathology and Laboratory Medicine, Calgary Laboratory Services/Alberta Health Services and University of Calgary, Calgary, AB, Canada
| | - Máire A Duggan
- Department of Pathology and Laboratory Medicine, Calgary Laboratory Services/Alberta Health Services and University of Calgary, Calgary, AB, Canada
| | - Prafull Ghatage
- Department of Gynecological Oncology, Tom Baker Cancer Centre, University of Calgary, Calgary, AB, Canada
| | - Khadija Warfa
- Department of Obstetrics and Gynaecology, Aga Khan University Hospital, Nairobi, Kenya
| | - Helen Steed
- Department of Obstetrics and Gynecology, University of Alberta, Edmonton, AB, Canada
| | - Renee Perrier
- Department of Medical Genetics, University of Calgary, Calgary, AB, Canada
| | - Linda E Kelemen
- Department of Public Health Sciences, College of Medicine, Charleston, SC, USA.,Hollings Cancer Center, Medical University of South Carolina, Charleston, SC, USA
| | - Martin Köbel
- Department of Pathology and Laboratory Medicine, Calgary Laboratory Services/Alberta Health Services and University of Calgary, Calgary, AB, Canada
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Ilkhani H, Hughes T, Li J, Zhong CJ, Hepel M. Nanostructured SERS-electrochemical biosensors for testing of anticancer drug interactions with DNA. Biosens Bioelectron 2016; 80:257-264. [PMID: 26851584 DOI: 10.1016/j.bios.2016.01.068] [Citation(s) in RCA: 105] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2015] [Revised: 01/26/2016] [Accepted: 01/28/2016] [Indexed: 12/31/2022]
Abstract
Widely used anti-cancer treatments involving chemotherapeutic drugs result in cancer cell damage due to their strong interaction with DNA. In this work, we have developed laboratory biosensors for screening chemotherapeutic drugs and to aid in the assessment of DNA modification/damage caused by these drugs. The sensors utilize surface-enhanced Raman scattering (SERS) spectroscopy and electrochemical methods to monitor sensory film modification and observe the drug-DNA reactivity. The self-assembled monolayer protected gold-disk electrode (AuDE) was coated with a reduced graphene oxide (rGO), decorated with plasmonic gold-coated Fe2Ni@Au magnetic nanoparticles functionalized with double-stranded DNA (dsDNA), a sequence of the breast cancer gene BRCA1. The nanobiosensors AuDE/SAM/rGO/Fe2Ni@Au/dsDNA were then subjected to the action of a model chemotherapeutic drug, doxorubicin (DOX), to assess the DNA modification and its dose dependence. The designed novel nanobiosensors offer SERS/electrochemical transduction, enabling chemically specific and highly sensitive analytical signals generation. The SERS measurements have corroborated the DOX intercalation into the DNA duplex whereas the electrochemical scans have indicated that the DNA modification by DOX proceeds in a concentration dependent manner, with limit of detection LOD=8 µg/mL (S/N=3), with semilog linearity over 3 orders of magnitude. These new biosensors are sensitive to agents that interact with DNA and facilitate the analysis of functional groups for determination of the binding mode. The proposed nanobiosensors can be applied in the first stage of the drug development for testing the interactions of new drugs with DNA before the drug efficacy can be assessed in more expensive testing in vitro and in vivo.
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Affiliation(s)
- Hoda Ilkhani
- Department of Chemistry, State University of New York at Potsdam, Potsdam, NY 13676, USA
| | - Taylor Hughes
- Department of Chemistry, State University of New York at Potsdam, Potsdam, NY 13676, USA
| | - Jing Li
- Department of Chemistry, State University of New York at Binghamton, Binghamton, NY 13902, USA
| | - Chuan Jian Zhong
- Department of Chemistry, State University of New York at Binghamton, Binghamton, NY 13902, USA
| | - Maria Hepel
- Department of Chemistry, State University of New York at Potsdam, Potsdam, NY 13676, USA.
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69
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The impact of risk-reducing gynaecological surgery in premenopausal women at high risk of endometrial and ovarian cancer due to Lynch syndrome. Fam Cancer 2015; 14:51-60. [PMID: 25342222 DOI: 10.1007/s10689-014-9761-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Women with Lynch syndrome (LS) have a significantly increased lifetime risk of endometrial cancer (40-60 %) and ovarian cancer (7-12 %). Currently there is little evidence to support the efficacy of screening for the early detection of these cancers. Another option is risk-reducing hysterectomy and/or bilateral salpingo-oophorectomy (BSO). Research on the impact of BSO in premenopausal women with a non-LS associated family history cancer has generally shown that women have a high level of satisfaction about their decision to undergo surgery. However, debilitating menopausal symptoms and sexual dysfunction are common post-surgical problems. We used a mixed methods study to explore the impact of risk-reducing gynaecological surgery in women with LS: 24 women were invited to take part; 15 (62.5 %) completed validated questionnaires and 12 (50 %) participated in semi-structured interviews. Our results suggest that risk reducing surgery does not lead to significant psychological distress and the women tend not to think or worry much about developing cancer. However, they tend to be distressed about the physical and somatic symptoms associated with menopause; their social well-being is somewhat affected, but sexual difficulties are minimal. The women reported being overwhelmingly satisfied with their decision to have surgery and with the quality of information they received prior to the operation. However, they felt underprepared for menopausal symptoms and received conflicting advice about whether or not to use HRT. Recommendations from the study include that professionals discuss the menopause, its side effects and HRT in detail prior to surgery.
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Dean M, Boland J, Yeager M, Im KM, Garland L, Rodriguez-Herrera M, Perez M, Mitchell J, Roberson D, Jones K, Lee HJ, Eggebeen R, Sawitzke J, Bass S, Zhang X, Robles V, Hollis C, Barajas C, Rath E, Arentz C, Figueroa JA, Nguyen DD, Nahleh Z. Addressing health disparities in Hispanic breast cancer: accurate and inexpensive sequencing of BRCA1 and BRCA2. Gigascience 2015; 4:50. [PMID: 26543556 PMCID: PMC4634732 DOI: 10.1186/s13742-015-0088-z] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Accepted: 08/13/2015] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND Germline mutations in the BRCA1 and BRCA2 genes account for 20-25 % of inherited breast cancers and about 10 % of all breast cancer cases. Detection of BRCA mutation carriers can lead to therapeutic interventions such as mastectomy, oophorectomy, hormonal prevention therapy, improved screening, and targeted therapies such as PARP-inhibition. We estimate that African Americans and Hispanics are 4-5 times less likely to receive BRCA screening, despite having similar mutation frequencies as non-Jewish Caucasians, who have higher breast cancer mortality. To begin addressing this health disparity, we initiated a nationwide trial of BRCA testing of Latin American women with breast cancer. Patients were recruited through community organizations, clinics, public events, and by mail and Internet. Subjects completed the consent process and questionnaire, and provided a saliva sample by mail or in person. DNA from 120 subjects was used to sequence the entirety of BRCA1 and BRCA2 coding regions and splice sites, and validate pathogenic mutations, with a total material cost of $85/subject. Subjects ranged in age from 23 to 81 years (mean age, 51 years), 6 % had bilateral disease, 57 % were ER/PR+, 23 % HER2+, and 17 % had triple-negative disease. RESULTS A total of seven different predicted deleterious mutations were identified, one newly described and the rest rare. In addition, four variants of unknown effect were found. CONCLUSIONS Application of this strategy on a larger scale could lead to improved cancer care of minority and underserved populations.
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Affiliation(s)
- Michael Dean
- Laboratory of Experimental Immunology, National Cancer Institute, Frederick, MD 21702 USA
| | - Joseph Boland
- Cancer Genetics Research Laboratory, Division of Cancer Epidemiology and Genetics, National Cancer Institute, Gaithersburg, MD USA
| | - Meredith Yeager
- Cancer Genetics Research Laboratory, Division of Cancer Epidemiology and Genetics, National Cancer Institute, Gaithersburg, MD USA
| | - Kate M. Im
- Laboratory of Experimental Immunology, National Cancer Institute, Frederick, MD 21702 USA
| | - Lisa Garland
- Laboratory of Experimental Immunology, National Cancer Institute, Frederick, MD 21702 USA
| | | | - Mylen Perez
- Laboratory of Experimental Immunology, National Cancer Institute, Frederick, MD 21702 USA
| | - Jason Mitchell
- Cancer Genetics Research Laboratory, Division of Cancer Epidemiology and Genetics, National Cancer Institute, Gaithersburg, MD USA
| | - David Roberson
- Cancer Genetics Research Laboratory, Division of Cancer Epidemiology and Genetics, National Cancer Institute, Gaithersburg, MD USA
| | - Kristine Jones
- Cancer Genetics Research Laboratory, Division of Cancer Epidemiology and Genetics, National Cancer Institute, Gaithersburg, MD USA
| | - Hyo Jung Lee
- Cancer Genetics Research Laboratory, Division of Cancer Epidemiology and Genetics, National Cancer Institute, Gaithersburg, MD USA
| | - Rebecca Eggebeen
- Cancer Genetics Research Laboratory, Division of Cancer Epidemiology and Genetics, National Cancer Institute, Gaithersburg, MD USA
| | - Julie Sawitzke
- Basic Science Program, Leidos Biomedical Research, Inc., Frederick, MD USA
| | - Sara Bass
- Cancer Genetics Research Laboratory, Division of Cancer Epidemiology and Genetics, National Cancer Institute, Gaithersburg, MD USA
| | - Xijun Zhang
- Cancer Genetics Research Laboratory, Division of Cancer Epidemiology and Genetics, National Cancer Institute, Gaithersburg, MD USA
| | | | - Celia Hollis
- Latino Community Development Agency, Oklahoma City, OK USA
| | | | - Edna Rath
- Texas Tech University Health Sciences Center, El Paso, TX USA
| | - Candy Arentz
- Texas Tech University Health Sciences Center, Lubbock, TX USA
| | | | - Diane D. Nguyen
- Texas Tech University Health Sciences Center, Lubbock, TX USA
| | - Zeina Nahleh
- Texas Tech University Health Sciences Center, El Paso, TX USA
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Zhang X, Guo G, Wang G, Zhao J, Wang B, Yu X, Ding Y. Profile of differentially expressed miRNAs in high-grade serous carcinoma and clear cell ovarian carcinoma, and the expression of miR-510 in ovarian carcinoma. Mol Med Rep 2015; 12:8021-31. [PMID: 26497752 PMCID: PMC4758286 DOI: 10.3892/mmr.2015.4485] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2014] [Accepted: 08/27/2015] [Indexed: 01/13/2023] Open
Abstract
Improved insight into the molecular and genetic profile of different types of epithelial ovarian cancer (EOC) is required for understanding the carcinogenesis of EOC and may potentially be exploited by future targeted therapies. The aim of the present study was to identify a unique microRNA (miRNA) patterns and key miRNAs, which may assist in predicting progression and prognosis in high‑grade serous carcinoma (HGSC) and clear cell carcinoma (CCC). To identify unique miRNA patterns associated with HGSC and CCC, a miRNA microarray was performed using Chinese tumor bank specimens of patients with HGSC or CCC in a retrospective analysis. The expression levels of four deregulated miRNAs were further validated using reverse transcription‑quantitative polymerase chain reaction (RT‑qPCR) in an external cohort of 42 cases of HGSC and 36 cases of CCC. Kaplan‑Meier analysis was performed to analyze the correlation between the expression levels of the four miRNAs and patient prognosis. Among these validated miRNAs, miR‑510 was further examined in another cohort of normal ovarian tissues, as well as the HGSC, low‑grade serous carcinoma (LGSC) and CCC specimens using RT‑qPCR and in situ hybridization. The results revealed that, of the 768 miRNAs analyzed in the microarray, 33 and 50 miRNAs were significantly upregulated and downregulated, respectively, with at least a 2‑fold difference in HGSC, compared with CCC. The quantitative analysis demonstrated that miR‑510 and miR‑129‑3p were significantly downregulated, and that miR‑483‑5p and miR‑miR‑449a were significantly upregulated in CCC, compared with HGSC (P<0.05), which was consistent with the microarray results. Kaplan‑Meier analysis revealed low expression levels of miR‑510 and low expression levels of miR‑129‑3p, advanced International Federation of Gynecology and Obstetrics (FIGO) stage, lymphatic metastasis and that HGSC was significantly associated with the poorer overall survival rates (P<0.05). The expression of miR‑510 was significantly higher in the LGSC and CCC tissues, compared with the HGSC and normal ovarian tissues. The results of the present study suggested that different subtypes of EOC have specific miRNA signatures, and that miR‑510 may be involved differently in HGSC and CCC. Thus, miR‑510 and miR‑129‑3p may be considered as potential novel candidate clinical biomarkers for predicting the outcome of EOC.
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Affiliation(s)
- Xinchen Zhang
- Department of Histology and Embryology, Dalian Medical University, Dalian, Liaoning 116044, P.R. China
| | - Gordon Guo
- Department of Radiation Oncology, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
| | - Guang Wang
- Department of Histology and Embryology, Dalian Medical University, Dalian, Liaoning 116044, P.R. China
| | - Jinyao Zhao
- Department of Histology and Embryology, Dalian Medical University, Dalian, Liaoning 116044, P.R. China
| | - Bo Wang
- Department of Pathology and Forensic Medicine, Dalian Medical University, Dalian, Liaoning 116044, P.R. China
| | - Xiaotang Yu
- Department of Pathology and Forensic Medicine, Dalian Medical University, Dalian, Liaoning 116044, P.R. China
| | - Yanfang Ding
- Department of Histology and Embryology, Dalian Medical University, Dalian, Liaoning 116044, P.R. China
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Saam J, Arnell C, Theisen A, Moyes K, Marino I, Roundy KM, Wenstrup RJ. Patients Tested at a Laboratory for Hereditary Cancer Syndromes Show an Overlap for Multiple Syndromes in Their Personal and Familial Cancer Histories. Oncology 2015; 89:288-93. [DOI: 10.1159/000437307] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2015] [Accepted: 06/27/2015] [Indexed: 11/19/2022]
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73
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Niskakoski A, Kaur S, Staff S, Renkonen-Sinisalo L, Lassus H, Järvinen HJ, Mecklin JP, Bützow R, Peltomäki P. Epigenetic analysis of sporadic and Lynch-associated ovarian cancers reveals histology-specific patterns of DNA methylation. Epigenetics 2015; 9:1577-87. [PMID: 25625843 PMCID: PMC4622692 DOI: 10.4161/15592294.2014.983374] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Diagnosis and treatment of epithelial ovarian cancer is challenging due to the poor understanding of the pathogenesis of the disease. Our aim was to investigate epigenetic mechanisms in ovarian tumorigenesis and, especially, whether tumors with different histological subtypes or hereditary background (Lynch syndrome) exhibit differential susceptibility to epigenetic inactivation of growth regulatory genes. Gene candidates for epigenetic regulation were identified from the literature and by expression profiling of ovarian and endometrial cancer cell lines treated with demethylating agents. Thirteen genes were chosen for methylation-specific multiplex ligation-dependent probe amplification assays on 104 (85 sporadic and 19 Lynch syndrome-associated) ovarian carcinomas. Increased methylation (i.e., hypermethylation) of variable degree was characteristic of ovarian carcinomas relative to the corresponding normal tissues, and hypermethylation was consistently more prominent in non-serous than serous tumors for individual genes and gene sets investigated. Lynch syndrome-associated clear cell carcinomas showed the highest frequencies of hypermethylation. Among endometrioid ovarian carcinomas, lower levels of promoter methylation of RSK4, SPARC, and HOXA9 were significantly associated with higher tumor grade; thus, the methylation patterns showed a shift to the direction of high-grade serous tumors. In conclusion, we provide evidence of a frequent epigenetic inactivation of RSK4, SPARC, PROM1, HOXA10, HOXA9, WT1-AS, SFRP2, SFRP5, OPCML, and MIR34B in the development of non-serous ovarian carcinomas of Lynch and sporadic origin, as compared to serous tumors. Our findings shed light on the role of epigenetic mechanisms in ovarian tumorigenesis and identify potential targets for translational applications.
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Affiliation(s)
- Anni Niskakoski
- a Department of Medical Genetics; Biomedicum Helsinki ; University of Helsinki ; Helsinki , Finland
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You Q, Yao Y, Zhang Y, Fu S, Du M, Zhang G. Effect of targeted ovarian cancer therapy using amniotic fluid mesenchymal stem cells transfected with enhanced green fluorescent protein-human interleukin-2 in vivo. Mol Med Rep 2015; 12:4859-66. [PMID: 26179662 PMCID: PMC4581758 DOI: 10.3892/mmr.2015.4076] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2014] [Accepted: 05/21/2015] [Indexed: 01/14/2023] Open
Abstract
The aim of the present study was to investigate the effect of using amniotic fluid mesenchymal stem cells (AF-MSCs) in targeted ovarian cancer therapy in vivo. AF-MSCs were isolated from human second trimester AF and a plasmid, enhanced green fluorescent protein-human interleukin-2 (pEGFP-hIL-2) was formed. The plasmid was stably transfected into the AF-MSCs and the cells were intravenously injected into ovarian cancer nude mice models. Following stable transfection of the vector, tumor formation, and the expression and activity of hIL-2 were investigated, and microscopic pathological examinations of the tumor were performed. It was found that AF-MSCs exhibited high motility during migration in vivo, and the vector, pEGFP-hIL-2 can be stably transfected into AF-MSCs. Following stable transfection, this type of stem cell is able to successfully transport the therapeutic gene, IL-2, migrate to the ovarian cancer tumor site to secrete the functional IL-2 and treat the tumor. Thus, AF-MSCs may serve as transporters for therapeutic genes targeting ovarian tumor sites and, therefore, be involved in the treatment of tumors.
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Affiliation(s)
- Qi You
- Department of Gynecology and Obstetrics, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
| | - Yuan Yao
- Department of Gynecology and Obstetrics, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
| | - Yuanlong Zhang
- Department of General Surgery, Harbin Red Cross Central Hospital, Harbin, Heilongjiang 150076, P.R. China
| | - Songbin Fu
- Department of Genetics, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Mei Du
- Department of Gynecology and Obstetrics, Harbin Maternal and Child Health Care Hospital, Harbin, Heilongjiang 150026, P.R. China
| | - Guangmei Zhang
- Department of Gynecology and Obstetrics, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
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Hereditary ovarian cancer: not only BRCA 1 and 2 genes. BIOMED RESEARCH INTERNATIONAL 2015; 2015:341723. [PMID: 26075229 PMCID: PMC4449870 DOI: 10.1155/2015/341723] [Citation(s) in RCA: 130] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/02/2015] [Revised: 04/27/2015] [Accepted: 04/29/2015] [Indexed: 01/10/2023]
Abstract
More than one-fifth of ovarian tumors have hereditary susceptibility and, in about 65-85% of these cases, the genetic abnormality is a germline mutation in BRCA genes. Nevertheless, several other suppressor genes and oncogenes have been associated with hereditary ovarian cancers, including the mismatch repair (MMR) genes in Lynch syndrome, the tumor suppressor gene, TP53, in the Li-Fraumeni syndrome, and several other genes involved in the double-strand breaks repair system, such as CHEK2, RAD51, BRIP1, and PALB2. The study of genetic discriminators and deregulated pathways involved in hereditary ovarian syndromes is relevant for the future development of molecular diagnostic strategies and targeted therapeutic approaches. The recent development and implementation of next-generation sequencing technologies have provided the opportunity to simultaneously analyze multiple cancer susceptibility genes, reduce the delay and costs, and optimize the molecular diagnosis of hereditary tumors. Particularly, the identification of mutations in ovarian cancer susceptibility genes in healthy women may result in a more personalized cancer risk management with tailored clinical and radiological surveillance, chemopreventive approaches, and/or prophylactic surgeries. On the other hand, for ovarian cancer patients, the identification of mutations may provide potential targets for biologic agents and guide treatment decision-making.
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Gambaro K, Quinn MCJ, Cáceres-Gorriti KY, Shapiro RS, Provencher D, Rahimi K, Mes-Masson AM, Tonin PN. Low levels of IGFBP7 expression in high-grade serous ovarian carcinoma is associated with patient outcome. BMC Cancer 2015; 15:135. [PMID: 25886299 PMCID: PMC4381406 DOI: 10.1186/s12885-015-1138-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2014] [Accepted: 02/26/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Insulin-like growth factor binding protein 7 (IGFBP7) has been suggested to act as a tumour suppressor gene in various human cancers, yet its role in epithelial ovarian cancer (EOC) has not yet been investigated. We previously observed that IGFBP7 was one of several genes found significantly upregulated in an EOC cell line model rendered non-tumourigenic as consequence of genetic manipulation. The aim of the present study was to investigate the role of IGFBP7 in high-grade serous ovarian carcinomas (HGSC), the most common type of EOC. METHODS We analysed IGFBP7 gene expression in 11 normal ovarian surface epithelial cells (NOSE), 79 high-grade serous ovarian carcinomas (HGSC), and seven EOC cell lines using a custom gene expression array platform. IGFBP7 mRNA expression profiles were also extracted from publicly available databases. Protein expression was assessed by immunohistochemistry of 175 HGSC and 10 normal fallopian tube samples using tissue microarray and related to disease outcome. We used EOC cells to investigate possible mechanisms of gene inactivation and describe various in vitro growth effects of exposing EOC cell lines to human recombinant IGFBP7 protein and conditioned media. RESULTS All HGSCs exhibited IGFBP7 expression levels that were significantly (p = 0.001) lower than the mean of the expression value of NOSE samples and that of a whole ovary sample. IGFBP7 gene and protein expression were lower in tumourigenic EOC cell lines relative to a non-tumourigenic EOC cell line. None of the EOC cell lines harboured a somatic mutation in IGFBP7, although loss of heterozygosity (LOH) of the IGFBP7 locus and epigenetic methylation silencing of the IGFBP7 promoter was observed in two of the cell lines exhibiting loss of gene/protein expression. In vitro functional assays revealed an alteration of the EOC cell migration capacity. Protein expression analysis of HGSC samples revealed that the large majority of tumour cores (72.6%) showed low or absence of IGFBP7 staining and revealed a significant correlation between IGFBP7 protein expression and a prolonged overall survival (p = 0.044). CONCLUSION The low levels of IGFPB7 in HGSC relative to normal tissues, and association with survival are consistent with a purported role in tumour suppressor pathways.
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Affiliation(s)
- Karen Gambaro
- Department of Human Genetics, McGill University, Montreal, H3A 1B1, Canada. .,Centre de recherche du Centre hospitalier de l'Université de Montréal/Institut du cancer de Montréal, Montreal, H2X 0B9, Canada.
| | - Michael C J Quinn
- Department of Human Genetics, McGill University, Montreal, H3A 1B1, Canada. .,Centre de recherche du Centre hospitalier de l'Université de Montréal/Institut du cancer de Montréal, Montreal, H2X 0B9, Canada.
| | - Katia Y Cáceres-Gorriti
- Centre de recherche du Centre hospitalier de l'Université de Montréal/Institut du cancer de Montréal, Montreal, H2X 0B9, Canada.
| | - Rebecca S Shapiro
- Department of Human Genetics, McGill University, Montreal, H3A 1B1, Canada.
| | - Diane Provencher
- Centre de recherche du Centre hospitalier de l'Université de Montréal/Institut du cancer de Montréal, Montreal, H2X 0B9, Canada. .,Department of Obstetric-Gynecology, Université de Montréal, Montreal, H2L 4M1, Canada.
| | - Kurosh Rahimi
- Department of Pathology, Université de Montréal, Montreal, H3C 3J7, Canada.
| | - Anne-Marie Mes-Masson
- Centre de recherche du Centre hospitalier de l'Université de Montréal/Institut du cancer de Montréal, Montreal, H2X 0B9, Canada. .,Department of Medicine, Université de Montréal, Montreal, H3C 3J7, Canada.
| | - Patricia N Tonin
- Department of Human Genetics, McGill University, Montreal, H3A 1B1, Canada. .,The Research Institute of the McGill University Health Centre, Montreal, H4A 3J1, Canada. .,Department of Medicine, McGill University, Montreal, H3G 1A4, Canada. .,Research Institute of the McGill University Health Centre, 1001 Decarie Boulevard, Site Glen Pavillion Block E, Cancer Research Program E026217 (cubicle E), Montreal, Quebec, H4A 3J1, Canada.
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Dong J, Zhang T, Wen B. Impact of Olaparib for Maintenance Monotherapy on Survival in Breast and Ovarian Cancer: A Systematic Review and Pooled Analysis of Published Trials. ACTA ACUST UNITED AC 2015. [DOI: 10.4236/ijmpcero.2015.44040] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Jégu M, Some Der A, Morcel K, Abadie C, Fritel X, Levêque J. [Breast and ovarian cancer due to BRCA1&2 hereditary cancer predisposition syndrome and reproduction: literature review]. J Gynecol Obstet Hum Reprod 2015; 44:10-17. [PMID: 25455630 DOI: 10.1016/j.jgyn.2014.10.011] [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: 01/09/2014] [Revised: 10/03/2014] [Accepted: 10/10/2014] [Indexed: 06/04/2023]
Abstract
INTRODUCTION Germline mutations BRCA1&2 are responsible in women for breast and ovarian cancers that commonly occur at a young age: as such, there are strong interactions between the oncological risks and the events of reproductive life, pregnancy, breastfeeding, and management of infertility. MATERIALS AND METHODS A review of the international literature from the PubMed database was conducted, and recommendations of French health agencies were exposed. Published studies are case-control and cohort studies in the majority, with a low level of evidence. RESULTS Pregnancy and lactation have no effect on breast and ovaries or even decreases the risk. The sex ratio among patients carrying the mutation is in favor of girls. It is not observed more infertility in patients carrying a mutation despite a strong suspicion of premature ovarian failure, and infertility treatments do not increase breast and ovarian risk. There are ethical debates concerning the place of pre-natal diagnosis: both experts and concerned patients recommend a case-by-case analysis of the requests.
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Affiliation(s)
- M Jégu
- Service de gynécologie obstétrique, CHU La Milétrie, 86000 Poitiers, France
| | - A Some Der
- Service de gynécologie, CHU Anne-de-Bretagne, 16, boulevard de Bulgarie, BP 90 347, 35203 Rennes cedex 2, France
| | - K Morcel
- Service de gynécologie, CHU Anne-de-Bretagne, 16, boulevard de Bulgarie, BP 90 347, 35203 Rennes cedex 2, France
| | - C Abadie
- Service de génétique, CHU Anne-de-Bretagne, 16, boulevard de Bulgarie, BP 90 347, 35203 Rennes cedex 2, France
| | - X Fritel
- Service de gynécologie obstétrique, CHU La Milétrie, 86000 Poitiers, France
| | - J Levêque
- Service de gynécologie, CHU Anne-de-Bretagne, 16, boulevard de Bulgarie, BP 90 347, 35203 Rennes cedex 2, France.
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Zhang J. Poly (ADP-ribose) polymerase inhibitor: an evolving paradigm in the treatment of prostate cancer. Asian J Androl 2014; 16:401-6. [PMID: 24589464 PMCID: PMC4023365 DOI: 10.4103/1008-682x.123684] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Recent phase I studies have reported single-agent activities of poly (ADP-ribose) polymerase (PARP) inhibitor in sporadic and in BRCA-mutant prostate cancers. Two of the most common genetic alterations in prostate cancer, ETS gene rearrangement and loss of PTEN, have been linked to increased sensitivity to PARP inhibitor in preclinical models. Emerging evidence also suggests that PARP1 plays an important role in mediating the transcriptional activities of androgen receptor (AR) and ETS gene rearrangement. In this article, the preclinical work and early-phase clinical trials in developing PARP inhibitor-based therapy as a new treatment paradigm for metastatic prostate cancer are reviewed.
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Affiliation(s)
- Jingsong Zhang
- Department of Genitourinary Oncology and Department of Cancer Imaging and Metabolism, H Lee Moffitt Cancer Center and Research Institute, Tampa, FL, USA
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80
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Al Bakir M, Gabra H. The molecular genetics of hereditary and sporadic ovarian cancer: implications for the future. Br Med Bull 2014; 112:57-69. [PMID: 25473022 DOI: 10.1093/bmb/ldu034] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
INTRODUCTION Epithelial ovarian cancer (EOC) is a heterogeneous condition with poor survival outcomes. The genetics of hereditary and sporadic ovarian cancers will be covered and its implications to management and future research are discussed. SOURCES OF DATA Key recent published literature. AREAS OF AGREEMENT Both genetic and environmental factors play a role in the development of EOC. Most EOCs develop sporadically and are divided into low-grade/genetically stable type I tumours and high-grade/genetically unstable type II tumours. The commonest hereditary syndromes are hereditary breast ovarian cancer syndrome (HBOC-BRCA mutations) and Lynch syndrome (DNA mismatch repair mutations). AREAS OF CONTROVERSY The different histological types of EOC may not solely originate from the ovary but from the fallopian tube and endometriosis deposits; there is increasing evidence to support this. GROWING POINTS Our understanding of the genetics and frequencies of mutations in ovarian cancer is expanding. The proportion of heritable EOC is larger than previously estimated and not all patients have a clear family history for this. Mutations in genes involving the downstream BRCA signalling pathway have recently been implicated in HBOC. TP53 mutations are the single most commonly identified mutations in aggressive sporadic high-grade serous carcinomas, affecting essentially 100% of such tumours. Furthermore, there is increasing recognition that the different histological sub-types need to be treated as separate entities. AREAS FOR TIMELY RESEARCH Given how heterogeneous 'ovarian' cancer is, trials into new drugs should report responses for the different histo-/geno-types rather than simply using staging. Although the effect of new drugs such as poly(ADP-ribose) polymerase inhibitors are being investigated in ovarian cancer, there is still a need to develop targeted therapies-especially to tackle mutations in PI3 K pathway, RAS pathway and TP53.
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Affiliation(s)
- Maise Al Bakir
- Ovarian Cancer Action Research Centre, Department of Surgery and Cancer, Imperial College London, Du Cane Road, London W12 0NN, UK
| | - Hani Gabra
- Ovarian Cancer Action Research Centre, Department of Surgery and Cancer, Imperial College London, Du Cane Road, London W12 0NN, UK
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Kim HJ, Park JM, Lee HW, Lee EH, Kim MK. One Case of a BRCA1 Germ Line Mutation Ovarian Carcinoma Patient Based on Abnormal Immunohistochemistry Finding. KOREAN JOURNAL OF PATHOLOGY 2014; 48:379-81. [PMID: 25366075 PMCID: PMC4215965 DOI: 10.4132/koreanjpathol.2014.48.5.379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2013] [Revised: 10/02/2013] [Accepted: 10/17/2013] [Indexed: 11/17/2022]
Affiliation(s)
- Hyun Joo Kim
- Department of Obstetrics and Gynecology, Samsung Medical Center, Seoul, Korea
| | - Jung Min Park
- Department of Obstetrics and Gynecology, Samsung Medical Center, Seoul, Korea
| | - Hyoun Wook Lee
- Department of Pathology, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea
| | - Eun Hee Lee
- Department of Pathology, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea
| | - Min Kyu Kim
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea
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Lee JY, Kim HS, Suh DH, Kim MK, Chung HH, Song YS. Ovarian cancer biomarker discovery based on genomic approaches. J Cancer Prev 2014; 18:298-312. [PMID: 25337559 PMCID: PMC4189448 DOI: 10.15430/jcp.2013.18.4.298] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2013] [Revised: 12/15/2013] [Accepted: 12/16/2013] [Indexed: 12/20/2022] Open
Abstract
Ovarian cancer presents at an advanced stage in more than 75% of patients. Early detection has great promise to improve clinical outcomes. Although the advancing proteomic technologies led to the discovery of numerous ovarian cancer biomarkers, no screening method has been recommended for early detection of ovarian cancer. Complexity and heterogeneity of ovarian carcinogenesis is a major obstacle to discover biomarkers. As cancer arises due to accumulation of genetic change, understanding the close connection between genetic changes and ovarian carcinogenesis would provide the opportunity to find novel gene-level ovarian cancer biomarkers. In this review, we summarize the various gene-based biomarkers by genomic technologies, including inherited gene mutations, epigenetic changes, and differential gene expression. In addition, we suggest the strategy to discover novel gene-based biomarkers with recently introduced next generation sequencing.
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Affiliation(s)
- Jung-Yun Lee
- Department of Obstetrics and Gynecology, Seoul National University College of Medicine
| | - Hee Seung Kim
- Department of Obstetrics and Gynecology, Seoul National University College of Medicine
| | - Dong Hoon Suh
- Department of Obstetrics and Gynecology, Seoul National University College of Medicine
| | - Mi-Kyung Kim
- Department of Obstetrics and Gynecology, Seoul National University College of Medicine
| | - Hyun Hoon Chung
- Department of Obstetrics and Gynecology, Seoul National University College of Medicine
| | - Yong-Sang Song
- Department of Obstetrics and Gynecology, Seoul National University College of Medicine ; Cancer Research Institute, Seoul National University College of Medicine ; Major in Biomodulation, World Class University, Seoul National University, Seoul, Korea
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Dasari S, Tchounwou PB. Cisplatin in cancer therapy: molecular mechanisms of action. Eur J Pharmacol 2014; 740:364-78. [PMID: 25058905 PMCID: PMC4146684 DOI: 10.1016/j.ejphar.2014.07.025] [Citation(s) in RCA: 3424] [Impact Index Per Article: 342.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2014] [Revised: 07/13/2014] [Accepted: 07/14/2014] [Indexed: 02/06/2023]
Abstract
Cisplatin, cisplatinum, or cis-diamminedichloroplatinum (II), is a well-known chemotherapeutic drug. It has been used for treatment of numerous human cancers including bladder, head and neck, lung, ovarian, and testicular cancers. It is effective against various types of cancers, including carcinomas, germ cell tumors, lymphomas, and sarcomas. Its mode of action has been linked to its ability to crosslink with the purine bases on the DNA; interfering with DNA repair mechanisms, causing DNA damage, and subsequently inducing apoptosis in cancer cells. However, because of drug resistance and numerous undesirable side effects such as severe kidney problems, allergic reactions, decrease immunity to infections, gastrointestinal disorders, hemorrhage, and hearing loss especially in younger patients, other platinum-containing anti-cancer drugs such as carboplatin, oxaliplatin and others, have also been used. Furthermore, combination therapies of cisplatin with other drugs have been highly considered to overcome drug-resistance and reduce toxicity. This comprehensive review highlights the physicochemical properties of cisplatin and related platinum-based drugs, and discusses its uses (either alone or in combination with other drugs) for the treatment of various human cancers. A special attention is paid to its molecular mechanisms of action, and its undesirable side effects.
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Affiliation(s)
- Shaloam Dasari
- Cellomics and Toxicogenomics Research Laboratory, NIH/NIMHD RCMI-Center for Environmental Health, College of Science, Engineering and Technology, Jackson State University, 1400 Lynch Street, Box 18750, Jackson, MS 39217, USA
| | - Paul Bernard Tchounwou
- Cellomics and Toxicogenomics Research Laboratory, NIH/NIMHD RCMI-Center for Environmental Health, College of Science, Engineering and Technology, Jackson State University, 1400 Lynch Street, Box 18750, Jackson, MS 39217, USA.
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84
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Kan CWS, Howell VM, Hahn MA, Marsh DJ. Genomic alterations as mediators of miRNA dysregulation in ovarian cancer. Genes Chromosomes Cancer 2014; 54:1-19. [PMID: 25280227 DOI: 10.1002/gcc.22221] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2014] [Accepted: 09/10/2014] [Indexed: 12/18/2022] Open
Abstract
Ovarian cancer is the fifth most common cause of cancer death in women worldwide. Serous epithelial ovarian cancer (SEOC) is the most common and aggressive histological subtype. Widespread genomic alterations go hand-in-hand with aberrant DNA damage signaling and are a hallmark of high-grade SEOC. MicroRNAs (miRNAs) are a class of small noncoding RNA molecules that are nonrandomly distributed in the genome. They are frequently located in chromosomal regions susceptible to copy number variation (CNV) associated with malignancy that can influence their expression. Widespread changes in miRNA expression have been reported in multiple cancer types including ovarian cancer. This review examines CNV and single nucleotide polymorphisms, two common types of genomic alterations that occur in ovarian cancer, in the context of their influence on the expression of miRNA and the ability of miRNA to bind to and regulate their target genes. This includes genes encoding proteins involved in DNA repair and the maintenance of genomic stability. Improved understanding of mechanisms of miRNA dysregulation and the role of miRNA in ovarian cancer will provide further insight into the pathogenesis and treatment of this disease.
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Affiliation(s)
- Casina W S Kan
- Hormones and Cancer Group, Kolling Institute of Medical Research, University of Sydney, Royal North Shore Hospital, St Leonards, Sydney, NSW 2065, Australia
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Vierkoetter KR, Ayabe AR, VanDrunen M, Ahn HJ, Shimizu DM, Terada KY. Lynch Syndrome in patients with clear cell and endometrioid cancers of the ovary. Gynecol Oncol 2014; 135:81-4. [PMID: 25093288 DOI: 10.1016/j.ygyno.2014.07.100] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2014] [Revised: 07/24/2014] [Accepted: 07/28/2014] [Indexed: 12/19/2022]
Abstract
OBJECTIVE Patients with Lynch Syndrome are at an increased risk for a variety of malignancies, including ovarian cancer. Ovarian cancers associated with Lynch Syndrome are predominantly clear cell or endometrioid in histology. Lynch Syndrome is characterized by germline mutations in mismatch repair (MMR) genes. The current study aims to assess the prevalence of loss of MMR expression in patients with endometrioid and clear cell ovarian carcinoma. METHODS A retrospective review identified 90 patients with endometrioid and/or clear cell carcinomas. Slides made from tumor tissue microarray blocks were evaluated using immunohistochemical stains with antibodies against MLH1, PMS2, MSH2, and MSH6. Statistical analysis was performed. RESULTS Seven of the 90 cases (7.8%) had loss of MMR expression. The mean age of patients with loss of MMR expression (47 years) was significantly younger than those with retained MMR expression (p=0.014). Loss of MMR expression was present in 20% of patients under the age of 53 with clear cell or endometrioid cancers. Genetic studies found that 3 of the 5 patients with loss of MMR expression carried mutations consistent with Lynch Syndrome; acquired hypermethylation of MLH1 was noted in one patient. Six of 7 patients (86%) whose tumors lacked MMR expression had synchronous or metachronous primary malignancies, a significantly greater prevalence than those with retained MMR expression (p<0.001). CONCLUSION Patients under the age of 53 with clear cell or endometrioid ovarian carcinomas are at a clinically significant risk for loss of MMR expression and Lynch Syndrome; routine screening with immunohistochemical staining should be considered.
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Affiliation(s)
- Koah R Vierkoetter
- Department of Pathology, John A. Burns School of Medicine, University of Hawaii, Honolulu, HI, USA.
| | - Asia R Ayabe
- Department of Pathology, John A. Burns School of Medicine, University of Hawaii, Honolulu, HI, USA
| | - Maya VanDrunen
- Department of Obstetrics, Gynecology, and Women's Health, John A. Burns School of Medicine, University of Hawaii, Honolulu, HI, USA
| | - Hyeong Jun Ahn
- Biostatistics Core, John A. Burns School of Medicine, University of Hawaii, Honolulu, HI, USA
| | - David M Shimizu
- Department of Pathology, John A. Burns School of Medicine, University of Hawaii, Honolulu, HI, USA
| | - Keith Y Terada
- Department of Obstetrics, Gynecology, and Women's Health, John A. Burns School of Medicine, University of Hawaii, Honolulu, HI, USA
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86
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Cohen SA, Leininger A. The genetic basis of Lynch syndrome and its implications for clinical practice and risk management. APPLICATION OF CLINICAL GENETICS 2014; 7:147-58. [PMID: 25161364 PMCID: PMC4142571 DOI: 10.2147/tacg.s51483] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Lynch syndrome is the most common cause of hereditary colon cancer, and accounts for as much as 3% of all colon and endometrial cancers. The identification and management of individuals with Lynch syndrome have evolved over the past 20 years, yet the syndrome remains vastly underdiagnosed. It is important for clinicians to recognize individuals and families who are at risk in order to be able to manage them appropriately and reduce their morbidity and mortality from this condition. This review will touch on the history of Lynch syndrome, the current knowledge of genotype–phenotype correlations, the cancers associated with Lynch syndrome, and management of individuals who are gene carriers.
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Affiliation(s)
- Stephanie A Cohen
- Cancer Genetics Risk Assessment Program, St Vincent Health, Indianapolis, IN, USA
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87
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Lynch HT, Snyder C, Casey MJ. Hereditary ovarian and breast cancer: what have we learned? Ann Oncol 2014; 24 Suppl 8:viii83-viii95. [PMID: 24131978 DOI: 10.1093/annonc/mdt313] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
An autosomal-dominant inherited trait predisposing women to both breast cancer (BC) and ovarian cancer (OC) was first described in 1971. Subsequent strides were made in identifying mutations in the eventually cloned genes BRCA1 and BRCA2 as being responsible for hereditary BC and OC (HBOC) in many women with early-onset HBOC. More recently, modifiers of BC risk have also been identified and are under study. The biological and molecular genetic pathways for malignant transformation in OC (ovarian epithelium and/or epithelium of the fallopian tube or, possibly, the endometrium and endocervix) remain elusive. The answer to the question 'What have we learned?' which is part of our chapter title unfortunately remains incomplete. However, intensive worldwide research indicates that its malignant transformation is the product of a multi-step process where there is an array of mutations which account for three or more classes of genes, inclusive of proto-oncogenes, tumor suppressor genes and mutator genes. This causal uncertainty heralds an enormous clinical-pathology dilemma, given the fact that epithelial OC, together with related Müllerian duct carcinoma, harbor the highest fatality rates of all gynecologic malignancies.
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Affiliation(s)
- H T Lynch
- Department of Preventive Medicine and Public Health, Creighton University, Omaha
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88
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Aviel-Ronen S, Soriano D, Shmuel E, Schonman R, Rosenblatt K, Zadok O, Vituri A, Seidman D, Barshack I, Cohen Y. Surgically treated ovarian endometriosis association with BRCA1 and BRCA2 mutations. Pathol Res Pract 2014; 210:250-5. [DOI: 10.1016/j.prp.2013.12.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/02/2013] [Revised: 12/10/2013] [Accepted: 12/30/2013] [Indexed: 10/25/2022]
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89
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House CD, Hernandez L, Annunziata CM. Recent technological advances in using mouse models to study ovarian cancer. Front Oncol 2014; 4:26. [PMID: 24592355 PMCID: PMC3923136 DOI: 10.3389/fonc.2014.00026] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2013] [Accepted: 01/28/2014] [Indexed: 12/14/2022] Open
Abstract
Serous epithelial ovarian cancer (SEOC) is the most lethal gynecological cancer in the United States with disease recurrence being the major cause of morbidity and mortality. Despite recent advances in our understanding of the molecular mechanisms responsible for the development of SEOC, the survival rate for women with this disease has remained relatively unchanged in the last two decades. Preclinical mouse models of ovarian cancer, including xenograft, syngeneic, and genetically engineered mice, have been developed to provide a mechanism for studying the development and progression of SEOC. Such models strive to increase our understanding of the etiology and dissemination of ovarian cancer in order to overcome barriers to early detection and resistance to standard chemotherapy. Although there is not a single model that is most suitable for studying ovarian cancer, improvements have led to current models that more closely mimic human disease in their genotype and phenotype. Other advances in the field, such as live animal imaging techniques, allow effective monitoring of the microenvironment and therapeutic efficacy. New and improved preclinical mouse models, combined with technological advances to study such models, will undoubtedly render success of future human clinical trials for patients with SEOC.
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Affiliation(s)
| | - Lidia Hernandez
- Women's Malignancies Branch, National Cancer Institute , Bethesda, MD , USA
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90
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Jervis S, Song H, Lee A, Dicks E, Tyrer J, Harrington P, Easton DF, Jacobs IJ, Pharoah PPD, Antoniou AC. Ovarian cancer familial relative risks by tumour subtypes and by known ovarian cancer genetic susceptibility variants. J Med Genet 2014; 51:108-13. [PMID: 24277755 DOI: 10.1136/jmedgenet-2013-102015] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
BACKGROUND Family history is one of the most important risk factors for epithelial ovarian cancer (EOC). Little is known, however, on how EOC familial relative risks (FRRs) vary by factors such as tumour subtype or the combined effects of common EOC susceptibility alleles. In addition, no data currently exist on the FRRs associated with EOC after exclusion of BRCA1 or BRCA2 mutation carriers. METHODS EOC FRRs were computed from observed EOCs in relatives of 1548 patients with EOC recruited between 1999 and 2010 from a population-based cohort study with known BRCA1 and BRCA2 mutation status and tumour subtype, compared with the number expected in the general population. RESULTS The EOC FRR to all first-degree relatives was estimated to be 2.96 (95% CI 2.35 to 3.72) but there was no evidence of difference in the FRRs for mothers, sisters and daughters. There was significant evidence that the FRR for relatives of patients with EOC diagnosed under age 50 years is higher than that for older patients (4.72 (95% CI 3.21 to 6.95) and 2.53 (95% CI 1.91 to 3.35), p-diff=0.0052) and a suggestion that the FRR in relatives of patients with serous disease is higher than that for non-serous tumours (3.64 (95% CI 2.72 to 4.87) and 2.25 (95% CI 1.56 to 3.26), p-diff=0.0023). The FRR to relatives of cases without a deleterious mutation in BRCA1 or BRCA2 was estimated to be over twice that of the general population (2.24 (95% CI 1.71 to 2.94)). BRCA1 and BRCA2 mutations were estimated to account for about 24% of the EOC FRR to first-degree relatives. FRRs were found to increase with increasing polygenic risk score of the index patient, although the trend was not significant. CONCLUSIONS These estimates could be useful in the counselling of relatives of patients with ovarian cancer.
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Affiliation(s)
- Sarah Jervis
- Department of Public and Primary Care, Centre for Cancer Genetic Epidemiology, University of Cambridge, Cambridge, UK
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91
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The Fallopian Tube as the Origin of High Grade Serous Ovarian Cancer: Review of a Paradigm Shift. JOURNAL OF OBSTETRICS AND GYNAECOLOGY CANADA 2014; 36:133-140. [DOI: 10.1016/s1701-2163(15)30659-9] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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92
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Xiao X, Melton DW, Gourley C. Mismatch repair deficiency in ovarian cancer — Molecular characteristics and clinical implications. Gynecol Oncol 2014; 132:506-12. [DOI: 10.1016/j.ygyno.2013.12.003] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2013] [Revised: 11/26/2013] [Accepted: 12/02/2013] [Indexed: 01/24/2023]
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93
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Casey MJ, Salzman TA. Therapeutic, prophylactic, untoward, and contraceptive effects of combined oral contraceptives: catholic teaching, natural law, and the principle of double effect when deciding to prescribe and use. THE AMERICAN JOURNAL OF BIOETHICS : AJOB 2014; 14:20-34. [PMID: 24978407 DOI: 10.1080/15265161.2014.919364] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Combined oral contraceptives (COC) have been demonstrated to have significant benefits for the treatment and prevention of disease. These medications also are associated with untoward health effects, and they may be directly contraceptive. Prescribers and users must compare and weigh the intended beneficial health effects against foreseeable but unintended possible adverse effects in their decisions to prescribe and use. Additionally, those who intend to abide by Catholic teachings must consider prohibitions against contraception. Ethical judgments concerning both health benefits and contraception are approached in this essay through an overview of the therapeutic, prophylactic, untoward, and contraceptive effects of COC and discussion of magisterial and traditional Catholic teachings from natural law. Discerning through the principle of double effect, proportionate reason, and evidence gathered from the sciences, medical and moral conclusions are drawn that we believe to be fully compliant with good medicine and Catholic teaching.
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94
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Tournier I, Marlin R, Walton K, Charbonnier F, Coutant S, Théry JC, Charbonnier C, Spurrell C, Vezain M, Ippolito L, Bougeard G, Roman H, Tinat J, Sabourin JC, Stoppa-Lyonnet D, Caron O, Bressac-de Paillerets B, Vaur D, King MC, Harrison C, Frebourg T. Germline mutations of inhibins in early-onset ovarian epithelial tumors. Hum Mutat 2013; 35:294-7. [PMID: 24302632 PMCID: PMC4284000 DOI: 10.1002/humu.22489] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2013] [Accepted: 11/22/2013] [Indexed: 01/26/2023]
Abstract
To identify novel genetic bases of early-onset epithelial ovarian tumors, we used the trio exome sequencing strategy in a patient without familial history of cancer who presented metastatic serous ovarian adenocarcinomas at 21 years of age. We identified a single de novo mutation (c.1157A>G/p.Asn386Ser) within the INHBA gene encoding the βA-subunit of inhibins/activins, which play a key role in ovarian development. In vitro, this mutation alters the ratio of secreted activins and inhibins. In a second patient with early-onset serous borderline papillary cystadenoma, we identified an unreported germline mutation (c.179G>T/p.Arg60Leu) of the INHA gene encoding the α-subunit, the partner of the βA-subunit. This mutation also alters the secreted activin/inhibin ratio, by disrupting both inhibin A and inhibin B biosynthesis. In a cohort of 62 cases, we detected an additional unreported germline mutation of the INHBA gene (c.839G>A/p.Gly280Glu). Our results strongly suggest that inhibin mutations contribute to the genetic determinism of epithelial ovarian tumors.
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Affiliation(s)
- Isabelle Tournier
- Inserm U1079, Institute for Research and Innovation in Biomedicine, University of Rouen, Rouen, Cancéropôle Nord-Ouest, France
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95
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Chuffa LGA, Fioruci-Fontanelli BA, Mendes LO, Fávaro WJ, Pinheiro PFF, Martinez M, Martinez FE. Characterization of chemically induced ovarian carcinomas in an ethanol-preferring rat model: influence of long-term melatonin treatment. PLoS One 2013; 8:e81676. [PMID: 24367487 PMCID: PMC3867328 DOI: 10.1371/journal.pone.0081676] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2013] [Accepted: 10/15/2013] [Indexed: 11/29/2022] Open
Abstract
Ovarian cancer is the fourth most common cause of cancer deaths among women, and chronic alcoholism may exert co-carcinogenic effects. Because melatonin (mel) has oncostatic properties, we aimed to investigate and characterize the chemical induction of ovarian tumors in a model of ethanol-preferring rats and to verify the influence of mel treatment on the overall features of these tumors. After rats were selected to receive ethanol (EtOH), they were surgically injected with 100 µg of 7,12-dimethyl-benz[a]anthracene (DMBA) plus sesame oil directly under the left ovarian bursa. At 260 days old, half of the animals received i.p. injections of 200 µg mel/100 g b.w. for 60 days. Four experimental groups were established: Group C, rats bearing ovarian carcinomas (OC); Group C+EtOH, rats voluntarily consuming 10% (v/v) EtOH and bearing OC; Group C+M, rats bearing OC and receiving mel; and Group C+EtOH+M, rats with OC consuming EtOH and receiving mel. Estrous cycle and nutritional parameters were evaluated, and anatomopathological analyses of the ovarian tumors were conducted. The incidence of ovarian tumors was higher in EtOH drinking animals 120 days post-DMBA administration, and mel efficiently reduced the prevalence of some aggressive tumors. Although mel promoted high EtOH consumption, it was effective in synchronizing the estrous cycle and reducing ovarian tumor mass by 20%. While rats in the C group displayed cysts containing serous fluid, C+EtOH rats showed solid tumor masses. After mel treatment, the ovaries of these rats presented as soft and mobile tissues. EtOH consumption increased the incidence of serous papillary carcinomas and sarcomas but not clear cell carcinomas. In contrast, mel reduced the incidence of sarcomas, endometrioid carcinomas and cystic teratomas. Combination of DMBA with EtOH intake potentiated the incidence of OC with malignant histologic subtypes. We concluded that mel reduces ovarian masses and the incidence of adenocarcinomas in ethanol-deprived rats.
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Affiliation(s)
- Luiz Gustavo A. Chuffa
- Departamento de Anatomia, Instituto de Biociências, UNESP – Universidade Estadual Paulista, Botucatu-SP, Brazil
- * E-mail:
| | - Beatriz A. Fioruci-Fontanelli
- Departamento de Anatomia, Instituto de Biociências, UNESP – Universidade Estadual Paulista, Botucatu-SP, Brazil
- Programa de Pós-Graduação em Biologia Celular e Estrutural, Instituto de Biologia, Universidade Estadual de Campinas – UNICAMP, Campinas-SP, Brazil
| | - Leonardo O. Mendes
- Departamento de Anatomia, Instituto de Biociências, UNESP – Universidade Estadual Paulista, Botucatu-SP, Brazil
- Programa de Pós-Graduação em Biologia Celular e Estrutural, Instituto de Biologia, Universidade Estadual de Campinas – UNICAMP, Campinas-SP, Brazil
| | - Wagner J. Fávaro
- Departamento de Anatomia, Biologia Celular e Fisiologia e Biofísica, UNICAMP – Universidade de Campinas, Campinas-SP, Brazil
| | | | - Marcelo Martinez
- Departamento de Morfologia e Patologia, UFSCar – Universidade Federal de São Carlos, São Carlos-SP, Brazil
| | - Francisco Eduardo Martinez
- Departamento de Anatomia, Instituto de Biociências, UNESP – Universidade Estadual Paulista, Botucatu-SP, Brazil
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96
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Niskakoski A, Kaur S, Renkonen-Sinisalo L, Lassus H, Järvinen HJ, Mecklin JP, Bützow R, Peltomäki P. Distinct molecular profiles in Lynch syndrome-associated and sporadic ovarian carcinomas. Int J Cancer 2013; 133:2596-608. [PMID: 23716351 DOI: 10.1002/ijc.28287] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2013] [Accepted: 05/10/2013] [Indexed: 01/13/2023]
Abstract
Ovarian carcinoma in Lynch syndrome (LS) is associated with unexpectedly high survival; yet, beyond DNA mismatch repair (MMR) defects, the developmental mechanisms are unknown. We used established (genetic) and new (epigenetic) classifiers of ovarian cancer to explore similarities and differences between LS-associated and sporadic diseases. To this end, all available ovarian carcinomas (n = 20) from MMR gene mutation carriers ascertained through a nation-wide registry and 87 sporadic ovarian carcinomas of the main histological types were molecularly profiled. LS-ovarian carcinomas were mostly of nonserous histology (12 endometrioid, seven clear cell and one serous), diagnosed at a mean age of 45.7 years, and associated with a 10-year survival of 87%. Among LS-ovarian carcinomas, 19/20 (95%) were MMR-deficient vs. 11/87 (13%) among sporadic cases (p < 0.0001). In a striking contrast to the sporadic cases, the expression of p53 was normal and KRAS/BRAF mutations absent in all LS-ovarian carcinomas. PIK3CA mutations, suggested to be a favorable prognostic factor, occurred with a frequency of 6/20 (30%), which was comparable to sporadic tumors of endometrioid or clear cell type. Tumor suppressor genes were more frequently methylated and LINE-1 hypomethylation less common in LS-ovarian carcinomas compared to their sporadic counterparts. The patterns of genetic and epigenetic alterations reflected the origin as LS vs. sporadic cases on one hand and the histological type on the other hand. In conclusion, the significant molecular differences observed between LS-associated and sporadic ovarian carcinomas help explain the different behavior of these tumors and emphasize the need for tailored clinical management.
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Affiliation(s)
- Anni Niskakoski
- Department of Medical Genetics, Haartman Institute, University of Helsinki, Helsinki, Finland
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97
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Kobayashi H, Ohno S, Sasaki Y, Matsuura M. Hereditary breast and ovarian cancer susceptibility genes (review). Oncol Rep 2013; 30:1019-29. [PMID: 23779253 DOI: 10.3892/or.2013.2541] [Citation(s) in RCA: 104] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2013] [Accepted: 05/20/2013] [Indexed: 11/06/2022] Open
Abstract
Women with hereditary breast and ovarian cancer (HBOC) syndrome represent a unique group who are diagnosed at a younger age and result in an increased lifetime risk for developing breast, ovarian and other cancers. This review integrates recent progress and insights into the molecular basis that underlie the HBOC syndrome. A review of English language literature was performed by searching MEDLINE published between January 1994 and October 2012. Mutations and common sequence variants in the BRCA1 and BRCA2 (BRCA) genes are responsible for the majority of HBOC syndrome. Lifetime cancer risks in BRCA mutation carriers are 60-80% for breast cancer and 20-40% for ovarian cancer. Mutations in BRCA genes cannot account for all cases of HBOC, indicating that the remaining cases can be attributed to the involvement of constitutive epimutations or other cancer susceptibility genes, which include Fanconi anemia (FA) cluster (FANCD2, FANCA and FANCC), mismatch repair (MMR) cluster (MLH1, MSH2, PMS1, PMS2 and MSH6), DNA repair cluster (ATM, ATR and CHK1/2), and tumor suppressor cluster (TP53, SKT11 and PTEN). Sporadic breast cancers with TP53 mutations or epigenetic silencing (hypermethylation), ER- and PgR-negative status, an earlier age of onset and high tumor grade resemble phenotypically BRCA1 mutated cancers termed 'BRCAness', those with no BRCA mutations but with a dysfunction of the DNA repair system. In conclusion, genetic or epigenetic loss-of-function mutations of genes that are known to be involved in the repair of DNA damage may lead to increased risk of developing a broad spectrum of breast and ovarian cancers.
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Affiliation(s)
- Hiroshi Kobayashi
- Department of Obstetrics and Gynecology, Nara Medical University, Kashihara, Nara 634-8522, Japan
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98
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Phenotypic heterogeneity of hereditary gynecologic cancers: a report from the Creighton hereditary cancer registry. Fam Cancer 2013; 12:719-40. [DOI: 10.1007/s10689-013-9651-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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99
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van Altena AM, van Aarle S, Kiemeney LALM, Hoogerbrugge N, Massuger LFAG, de Hullu JA. Adequacy of family history taking in ovarian cancer patients: a population-based study. Fam Cancer 2013; 11:343-9. [PMID: 22388872 PMCID: PMC3496539 DOI: 10.1007/s10689-012-9518-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The aim of this study was to evaluate the adequacy of family history taking in epithelial ovarian cancer (EOC) patients and to identify factors that determine adequacy. Furthermore, the validity of family history taking was assessed by comparison with self-administered questionnaires. Medical records of all 1,112 EOC patients registered by the nation-wide cancer registry and diagnosed in eleven Dutch hospitals between 1996 and 2006 were reviewed. Adequate family history taking was defined as a written notification of the presence or absence of relatives with breast or ovarian cancer. Factors that were correlated with family history taking were identified using univariable and multivariable logistic regression. 147 patients filled in a postal questionnaire. An adequate family history was taken in 41% of all cases. Younger age, an academic hospital and having undergone surgery and/or chemotherapy were associated with adequate family history taking. The comparison with self-administered questionnaires showed a disagreement in 64% mainly due to missing data in medical records. Documentation on family history is either absent or inadequate in the medical records in the majority of EOC patients. These data urge for better uptake of hereditary cancer risk assessment. Different strategies for this assessment like improved family history taking and genetic testing in EOC patients should be explored.
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Affiliation(s)
- Anne M van Altena
- Department of Obstetrics and Gynecology, Radboud University Medical Centre, P.O. Box 9101, 6500 HB, Nijmegen, The Netherlands.
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100
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Khanra K, Panda K, Mitra AK, Sarkar R, Bhattacharya C, Bhattacharya N. Exon 8-9 mutations of DNA polymerase β in ovarian carcinoma patients from Haldia, India. Asian Pac J Cancer Prev 2013; 13:4183-6. [PMID: 23098424 DOI: 10.7314/apjcp.2012.13.8.4183] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Ovarian cancer is the number one killer among all the gynecological cancers. We undertook association study to identify potential alterations in the genomic DNA of a DNA repair gene, DNA polymerase beta (polβ), involved in base excision repair (BER), in ovarian carcinomas of patients from Haldia, India. Mutations, splice variants have been reported earlier in different tumors other than ovarian tumors. AIM In this study we explored the possibility of association of any mutation of pol beta (Exon 8) with prognosis in 152 ovarian cancer samples. RESULTS Alteration in the exon 8 region (Exon 8:468, AgC; 15.1%) was noted among fifty seven polymorphism positive samples. Alteration in the intervening sequence 8 (IVS8, -25, AgC; 3.9%) was also noted. All alterations are heterozygous in nature. CONCLUSIONS We found no significant association among the samples from serous type, stage IV, and the polβ mutations (P ≤ 0.01). Only a slight tendency of association was evident between IVS8, -25, A to C; and stage III. Further analysis with a larger number of samples is needed.
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Affiliation(s)
- Kalyani Khanra
- Department of Biotechnology, Haldia Institute of Technology, Debhog, Haldia, India
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