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Parashar D, Geethadevi A, Mittal S, McAlarnen LA, George J, Kadamberi IP, Gupta P, Uyar DS, Hopp EE, Drendel H, Bishop EA, Bradley WH, Bone KM, Rader JS, Pradeep S, Chaluvally-Raghavan P. Patient-Derived Ovarian Cancer Spheroids Rely on PI3K-AKT Signaling Addiction for Cancer Stemness and Chemoresistance. Cancers (Basel) 2022; 14:cancers14040958. [PMID: 35205706 PMCID: PMC8870411 DOI: 10.3390/cancers14040958] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 02/03/2022] [Accepted: 02/08/2022] [Indexed: 02/05/2023] Open
Abstract
Simple Summary Epithelial ovarian cancer (EOC) is the most fatal gynecological cancer with poor survival rates and high mortality. EOC patients respond to standard platinum-based chemotherapy in the beginning, but relapse often due to chemoresistance. Ovarian cancer cells disseminate from the ovarian tumors and spread within the abdomen, where ascites fluid supports the growth and transition. Malignant ascites is present in a third of patients at diagnosis and is considered as a major source of chemoresistance, recurrence, poor survival, and mortality. Malignant ascites is a complex fluid that contains a pro-tumorigenic environment with disseminated cancer cells in 3D spheroids form. In this study, we established an ovarian cancer cell line and identified that 3D spheroids develop from the 2D monolayer, and the platinum-resistant phenotype develops due to the aberrant PI3K-AKT signaling in tumor cells. Furthermore, when we used a combinatorial approach of cisplatin with LY-294002 (a PI3K-AKT dual kinase inhibitor) to treat the cisplatin version of both MCW-OV-SL-3 and A-2780 cell lines, it prevented the 3D spheroid formation ability and also sensitized the cells for cisplatin. In brief, our results provided evidence to advance therapeutic approaches to treat cisplatin resistance in ovarian cancer patients. Abstract Ovarian cancer is the most lethal gynecological malignancy among women worldwide and is characterized by aggressiveness, cancer stemness, and frequent relapse due to resistance to platinum-based therapy. Ovarian cancer cells metastasize through ascites fluid as 3D spheroids which are more resistant to apoptosis and chemotherapeutic agents. However, the precise mechanism as an oncogenic addiction that makes 3D spheroids resistant to apoptosis and chemotherapeutic agents is not understood. To study the signaling addiction mechanism that occurs during cancer progression in patients, we developed an endometrioid subtype ovarian cancer cell line named ‘MCW-OV-SL-3’ from the ovary of a 70-year-old patient with stage 1A endometrioid adenocarcinoma of the ovary. We found that the cell line MCW-OV-SL-3 exhibits interstitial duplication of 1q (q21–q42), where this duplication resulted in high expression of the PIK3C2B gene and aberrant activation of PI3K-AKT-ERK signaling. Using short tandem repeat (STR) analysis, we demonstrated that the cell line exhibits a unique genetic identity compared to existing ovarian cancer cell lines. Notably, the MCW-OV-SL-3 cell line was able to form 3D spheroids spontaneously, which is an inherent property of tumor cells when plated on cell culture dishes. Importantly, the tumor spheroids derived from the MCW-OV-SL-3 cell line expressed high levels of c-Kit, PROM1, ZEB1, SNAI, VIM, and Twist1 compared to 2D monolayer cells. We also observed that the hyperactivation of ERK and PI3K/AKT signaling in these cancer cells resulted in resistance to cisplatin. In summary, the MCW-OV-SL3 endometrioid cell line is an excellent model to study the mechanism of cancer stemness and chemoresistance in endometrioid ovarian cancer.
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Affiliation(s)
- Deepak Parashar
- Department of Obstetrics and Gynecology, Medical College of Wisconsin, Milwaukee, WI 53226, USA; (D.P.); (A.G.); (S.M.); (L.A.M.); (J.G.); (I.P.K.); (P.G.); (D.S.U.); (E.E.H.); (E.A.B.); (W.H.B.); (J.S.R.); (S.P.)
| | - Anjali Geethadevi
- Department of Obstetrics and Gynecology, Medical College of Wisconsin, Milwaukee, WI 53226, USA; (D.P.); (A.G.); (S.M.); (L.A.M.); (J.G.); (I.P.K.); (P.G.); (D.S.U.); (E.E.H.); (E.A.B.); (W.H.B.); (J.S.R.); (S.P.)
| | - Sonam Mittal
- Department of Obstetrics and Gynecology, Medical College of Wisconsin, Milwaukee, WI 53226, USA; (D.P.); (A.G.); (S.M.); (L.A.M.); (J.G.); (I.P.K.); (P.G.); (D.S.U.); (E.E.H.); (E.A.B.); (W.H.B.); (J.S.R.); (S.P.)
| | - Lindsey A. McAlarnen
- Department of Obstetrics and Gynecology, Medical College of Wisconsin, Milwaukee, WI 53226, USA; (D.P.); (A.G.); (S.M.); (L.A.M.); (J.G.); (I.P.K.); (P.G.); (D.S.U.); (E.E.H.); (E.A.B.); (W.H.B.); (J.S.R.); (S.P.)
| | - Jasmine George
- Department of Obstetrics and Gynecology, Medical College of Wisconsin, Milwaukee, WI 53226, USA; (D.P.); (A.G.); (S.M.); (L.A.M.); (J.G.); (I.P.K.); (P.G.); (D.S.U.); (E.E.H.); (E.A.B.); (W.H.B.); (J.S.R.); (S.P.)
| | - Ishaque P. Kadamberi
- Department of Obstetrics and Gynecology, Medical College of Wisconsin, Milwaukee, WI 53226, USA; (D.P.); (A.G.); (S.M.); (L.A.M.); (J.G.); (I.P.K.); (P.G.); (D.S.U.); (E.E.H.); (E.A.B.); (W.H.B.); (J.S.R.); (S.P.)
| | - Prachi Gupta
- Department of Obstetrics and Gynecology, Medical College of Wisconsin, Milwaukee, WI 53226, USA; (D.P.); (A.G.); (S.M.); (L.A.M.); (J.G.); (I.P.K.); (P.G.); (D.S.U.); (E.E.H.); (E.A.B.); (W.H.B.); (J.S.R.); (S.P.)
| | - Denise S. Uyar
- Department of Obstetrics and Gynecology, Medical College of Wisconsin, Milwaukee, WI 53226, USA; (D.P.); (A.G.); (S.M.); (L.A.M.); (J.G.); (I.P.K.); (P.G.); (D.S.U.); (E.E.H.); (E.A.B.); (W.H.B.); (J.S.R.); (S.P.)
| | - Elizabeth E. Hopp
- Department of Obstetrics and Gynecology, Medical College of Wisconsin, Milwaukee, WI 53226, USA; (D.P.); (A.G.); (S.M.); (L.A.M.); (J.G.); (I.P.K.); (P.G.); (D.S.U.); (E.E.H.); (E.A.B.); (W.H.B.); (J.S.R.); (S.P.)
| | - Holli Drendel
- Department of Pathology, Medical College of Wisconsin, Milwaukee, WI 53226, USA; (H.D.); (K.M.B.)
| | - Erin A. Bishop
- Department of Obstetrics and Gynecology, Medical College of Wisconsin, Milwaukee, WI 53226, USA; (D.P.); (A.G.); (S.M.); (L.A.M.); (J.G.); (I.P.K.); (P.G.); (D.S.U.); (E.E.H.); (E.A.B.); (W.H.B.); (J.S.R.); (S.P.)
| | - William H. Bradley
- Department of Obstetrics and Gynecology, Medical College of Wisconsin, Milwaukee, WI 53226, USA; (D.P.); (A.G.); (S.M.); (L.A.M.); (J.G.); (I.P.K.); (P.G.); (D.S.U.); (E.E.H.); (E.A.B.); (W.H.B.); (J.S.R.); (S.P.)
| | - Kathleen M. Bone
- Department of Pathology, Medical College of Wisconsin, Milwaukee, WI 53226, USA; (H.D.); (K.M.B.)
| | - Janet S. Rader
- Department of Obstetrics and Gynecology, Medical College of Wisconsin, Milwaukee, WI 53226, USA; (D.P.); (A.G.); (S.M.); (L.A.M.); (J.G.); (I.P.K.); (P.G.); (D.S.U.); (E.E.H.); (E.A.B.); (W.H.B.); (J.S.R.); (S.P.)
| | - Sunila Pradeep
- Department of Obstetrics and Gynecology, Medical College of Wisconsin, Milwaukee, WI 53226, USA; (D.P.); (A.G.); (S.M.); (L.A.M.); (J.G.); (I.P.K.); (P.G.); (D.S.U.); (E.E.H.); (E.A.B.); (W.H.B.); (J.S.R.); (S.P.)
- Department of Physiology, Medical College of Wisconsin, Milwaukee, WI 53226, USA
- Cancer Center, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Pradeep Chaluvally-Raghavan
- Department of Obstetrics and Gynecology, Medical College of Wisconsin, Milwaukee, WI 53226, USA; (D.P.); (A.G.); (S.M.); (L.A.M.); (J.G.); (I.P.K.); (P.G.); (D.S.U.); (E.E.H.); (E.A.B.); (W.H.B.); (J.S.R.); (S.P.)
- Department of Physiology, Medical College of Wisconsin, Milwaukee, WI 53226, USA
- Cancer Center, Medical College of Wisconsin, Milwaukee, WI 53226, USA
- Correspondence:
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Vaidyanathan A, Sawers L, Gannon AL, Chakravarty P, Scott AL, Bray SE, Ferguson MJ, Smith G. ABCB1 (MDR1) induction defines a common resistance mechanism in paclitaxel- and olaparib-resistant ovarian cancer cells. Br J Cancer 2016; 115:431-41. [PMID: 27415012 PMCID: PMC4985349 DOI: 10.1038/bjc.2016.203] [Citation(s) in RCA: 222] [Impact Index Per Article: 27.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Revised: 05/26/2016] [Accepted: 06/02/2016] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Clinical response to chemotherapy for ovarian cancer is frequently compromised by the development of drug-resistant disease. The underlying molecular mechanisms and implications for prescription of routinely prescribed chemotherapy drugs are poorly understood. METHODS We created novel A2780-derived ovarian cancer cell lines resistant to paclitaxel and olaparib following continuous incremental drug selection. MTT assays were used to assess chemosensitivity to paclitaxel and olaparib in drug-sensitive and drug-resistant cells±the ABCB1 inhibitors verapamil and elacridar and cross-resistance to cisplatin, carboplatin, doxorubicin, rucaparib, veliparib and AZD2461. ABCB1 expression was assessed by qRT-PCR, copy number, western blotting and immunohistochemical analysis and ABCB1 activity assessed by the Vybrant and P-glycoprotein-Glo assays. RESULTS Paclitaxel-resistant cells were cross-resistant to olaparib, doxorubicin and rucaparib but not to veliparib or AZD2461. Resistance correlated with increased ABCB1 expression and was reversible following treatment with the ABCB1 inhibitors verapamil and elacridar. Active efflux of paclitaxel, olaparib, doxorubicin and rucaparib was confirmed in drug-resistant cells and in ABCB1-expressing bacterial membranes. CONCLUSIONS We describe a common ABCB1-mediated mechanism of paclitaxel and olaparib resistance in ovarian cancer cells. Optimal choice of PARP inhibitor may therefore limit the progression of drug-resistant disease, while routine prescription of first-line paclitaxel may significantly limit subsequent chemotherapy options in ovarian cancer patients.
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Affiliation(s)
- Aparajitha Vaidyanathan
- Division of Cancer Research, University of Dundee, Ninewells Hospital and Medical School, Dundee DD1 9SY, UK
| | - Lynne Sawers
- Division of Cancer Research, University of Dundee, Ninewells Hospital and Medical School, Dundee DD1 9SY, UK
| | - Anne-Louise Gannon
- Division of Cancer Research, University of Dundee, Ninewells Hospital and Medical School, Dundee DD1 9SY, UK
| | - Probir Chakravarty
- Bioinformatics and Biostatistics Service, Cancer Research UK, 44 Lincolns Inn Fields, London WC2A 3PX, UK
| | - Alison L Scott
- Division of Cancer Research, University of Dundee, Ninewells Hospital and Medical School, Dundee DD1 9SY, UK
| | - Susan E Bray
- Tayside Tissue Bank, University of Dundee, Ninewells Hospital and Medical School, Dundee DD1 9SY, UK
| | | | - Gillian Smith
- Division of Cancer Research, University of Dundee, Ninewells Hospital and Medical School, Dundee DD1 9SY, UK
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Vaidyanathan A, Sawers L, Gannon AL, Chakravarty P, Scott AL, Bray SE, Ferguson MJ, Smith G. ABCB1 (MDR1) induction defines a common resistance mechanism in paclitaxel- and olaparib-resistant ovarian cancer cells. Br J Cancer 2016. [PMID: 27415012 DOI: 10.1038/bjc.2016.203] [] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
BACKGROUND Clinical response to chemotherapy for ovarian cancer is frequently compromised by the development of drug-resistant disease. The underlying molecular mechanisms and implications for prescription of routinely prescribed chemotherapy drugs are poorly understood. METHODS We created novel A2780-derived ovarian cancer cell lines resistant to paclitaxel and olaparib following continuous incremental drug selection. MTT assays were used to assess chemosensitivity to paclitaxel and olaparib in drug-sensitive and drug-resistant cells±the ABCB1 inhibitors verapamil and elacridar and cross-resistance to cisplatin, carboplatin, doxorubicin, rucaparib, veliparib and AZD2461. ABCB1 expression was assessed by qRT-PCR, copy number, western blotting and immunohistochemical analysis and ABCB1 activity assessed by the Vybrant and P-glycoprotein-Glo assays. RESULTS Paclitaxel-resistant cells were cross-resistant to olaparib, doxorubicin and rucaparib but not to veliparib or AZD2461. Resistance correlated with increased ABCB1 expression and was reversible following treatment with the ABCB1 inhibitors verapamil and elacridar. Active efflux of paclitaxel, olaparib, doxorubicin and rucaparib was confirmed in drug-resistant cells and in ABCB1-expressing bacterial membranes. CONCLUSIONS We describe a common ABCB1-mediated mechanism of paclitaxel and olaparib resistance in ovarian cancer cells. Optimal choice of PARP inhibitor may therefore limit the progression of drug-resistant disease, while routine prescription of first-line paclitaxel may significantly limit subsequent chemotherapy options in ovarian cancer patients.
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Affiliation(s)
- Aparajitha Vaidyanathan
- Division of Cancer Research, University of Dundee, Ninewells Hospital and Medical School, Dundee DD1 9SY, UK
| | - Lynne Sawers
- Division of Cancer Research, University of Dundee, Ninewells Hospital and Medical School, Dundee DD1 9SY, UK
| | - Anne-Louise Gannon
- Division of Cancer Research, University of Dundee, Ninewells Hospital and Medical School, Dundee DD1 9SY, UK
| | - Probir Chakravarty
- Bioinformatics and Biostatistics Service, Cancer Research UK, 44 Lincolns Inn Fields, London WC2A 3PX, UK
| | - Alison L Scott
- Division of Cancer Research, University of Dundee, Ninewells Hospital and Medical School, Dundee DD1 9SY, UK
| | - Susan E Bray
- Tayside Tissue Bank, University of Dundee, Ninewells Hospital and Medical School, Dundee DD1 9SY, UK
| | | | - Gillian Smith
- Division of Cancer Research, University of Dundee, Ninewells Hospital and Medical School, Dundee DD1 9SY, UK
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Kudesia R, Li M, Smith J, Patel A, Williams Z. Rescue karyotyping: a case series of array-based comparative genomic hybridization evaluation of archival conceptual tissue. Reprod Biol Endocrinol 2014; 12:19. [PMID: 24589081 PMCID: PMC3996014 DOI: 10.1186/1477-7827-12-19] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Accepted: 02/27/2014] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND Determination of fetal aneuploidy is central to evaluation of recurrent pregnancy loss (RPL). However, obtaining this information at the time of a miscarriage is not always possible or may not have been ordered. Here we report on "rescue karyotyping", wherein DNA extracted from archived paraffin-embedded pregnancy loss tissue from a prior dilation and curettage (D&C) is evaluated by array-based comparative genomic hybridization (aCGH). METHODS A retrospective case series was conducted at an academic medical center. Patients included had unexplained RPL and a prior pregnancy loss for which karyotype information would be clinically informative but was unavailable. After extracting DNA from slides of archived tissue, aCGH with a reduced stringency approach was performed, allowing for analysis of partially degraded DNA. Statistics were computed using STATA v12.1 (College Station, TX). RESULTS Rescue karyotyping was attempted on 20 specimens from 17 women. DNA was successfully extracted in 16 samples (80.0%), enabling analysis at either high or low resolution. The longest interval from tissue collection to DNA extraction was 4.2 years. There was no significant difference in specimen sufficiency for analysis in the collection-to-extraction interval (p=0.14) or gestational age at pregnancy loss (p=0.32). Eight specimens showed copy number variants: 3 trisomies, 2 partial chromosomal deletions, 1 mosaic abnormality and 2 unclassified variants. CONCLUSIONS Rescue karyotyping using aCGH on DNA extracted from paraffin-embedded tissue provides the opportunity to obtain critical fetal cytogenetic information from a prior loss, even if it occurred years earlier. Given the ubiquitous archiving of paraffin embedded tissue obtained during a D&C and the ease of obtaining results despite long loss-to-testing intervals or early gestational age at time of fetal demise, this may provide a useful technique in the evaluation of couples with recurrent pregnancy loss.
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Affiliation(s)
- Rashmi Kudesia
- Program for Early and Recurrent Pregnancy Loss (PEARL), Department of Obstetrics, Gynecology & Women’s Health, Albert Einstein College of Medicine, 1301 Morris Park Avenue, Price Building, Room 474, Bronx, NY 10461, USA
| | - Marilyn Li
- Department of Molecular and Human Genetics, Baylor College of Medicine, One Baylor Plaza, Mail Stop NAB 2015, Houston, TX 77030, USA
| | - Janice Smith
- Department of Molecular and Human Genetics, Baylor College of Medicine, One Baylor Plaza, Mail Stop NAB 2015, Houston, TX 77030, USA
| | - Ankita Patel
- Department of Molecular and Human Genetics, Baylor College of Medicine, One Baylor Plaza, Mail Stop NAB 2015, Houston, TX 77030, USA
| | - Zev Williams
- Program for Early and Recurrent Pregnancy Loss (PEARL), Department of Obstetrics, Gynecology & Women’s Health, Albert Einstein College of Medicine, 1301 Morris Park Avenue, Price Building, Room 474, Bronx, NY 10461, USA
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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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Hoskins E, Rodriguez-Canales J, Hewitt SM, Elmasri W, Han J, Han S, Davidson B, Kohn EC. Paracrine SLPI secretion upregulates MMP-9 transcription and secretion in ovarian cancer cells. Gynecol Oncol 2011; 122:656-62. [PMID: 21676452 PMCID: PMC3152651 DOI: 10.1016/j.ygyno.2011.04.052] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2011] [Revised: 04/27/2011] [Accepted: 04/30/2011] [Indexed: 01/03/2023]
Abstract
OBJECTIVES Secretory leukocyte protease inhibitor (SLPI) is amplified in serous ovarian cancer. We have dissected its function, showing it is a survival factor for ovarian cancer and promotes tumorigenesis and paclitaxel-resistance. We hypothesized that the protease inhibitory function was responsible for modulating SLPI's invasive capacity. METHODS Stable HEYA8 ovarian cancer transfectants expressing vector, wild type SLPI, and protease inhibitor null (F-)SLPI were examined in vitro and in xenografts. Invasion, enzyme activity, and MMP production and function assays were applied. SLPI and MMP immunoexpression was graded on tissue microarray and clinical samples. Statistical comparisons used unpaired t test and ANOVA, where appropriate. RESULTS SLPI and F-SLPI cells caused greater parenchymal and peritoneal dissemination over control cells in xenografts and invasion assays (p<0.001). MMP-9 protease activity was increased in SLPI and F-SLPI cells over control. SLPI, but not F-SLPI, inhibited plasmin activity, necessary for MMP-9 activation and release, and inhibited activation of MMP-9. However, paradoxically, both induced quantitative MMP-9 transcription (p<0.05) and protein (p<0.008), yielding an increased net MMP-9 activity in the face of plasmin inhibition. SLPI and MMP-9 expression were strongly correlated in serous ovarian cancers (r(2)=0.986) and a set of ovarian cancers (p<0.02). SLPI expression was greater in serous than endometrioid ovarian cancers (p=0.04). CONCLUSIONS SLPI stimulates ovarian cancer invasion, modulated in part by its serine protease inhibitory activity attenuating MMP-9 release. However, SLPI induction of MMP-9, independent of protease inhibition activity, is greater yielding a net pro-invasive behavior. These findings further support SLPI as a molecular target for ovarian cancer.
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Affiliation(s)
- Ebony Hoskins
- Molecular Signaling Section, Medical Oncology Branch, National Cancer Institute, Bethesda, Maryland 20892
| | - Jaime Rodriguez-Canales
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, Bethesda, Maryland 20892
| | - Stephen M. Hewitt
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, Bethesda, Maryland 20892
| | - Wafic Elmasri
- Molecular Signaling Section, Medical Oncology Branch, National Cancer Institute, Bethesda, Maryland 20892
| | - Jasmine Han
- Molecular Signaling Section, Medical Oncology Branch, National Cancer Institute, Bethesda, Maryland 20892
| | - Shing Han
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, Bethesda, Maryland 20892
| | - Ben Davidson
- Division of Pathology, Norwegian Radium Hospital, Oslo University Hospital; The Medical Faculty, University of Oslo, Norway
| | - Elise C. Kohn
- Molecular Signaling Section, Medical Oncology Branch, National Cancer Institute, Bethesda, Maryland 20892
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Abstract
Ovarian carcinomas are a heterogeneous group of neoplasms and are traditionally subclassified based on type and degree of differentiation. Although current clinical management of ovarian carcinoma largely fails to take this heterogeneity into account, it is becoming evident that each major histological type has characteristic genetic defects that deregulate specific signaling pathways in the tumor cells. Moreover, within the most common histological types, the molecular pathogenesis of low-grade versus high-grade tumors appears to be largely distinct. Mouse models of ovarian carcinoma have been developed that recapitulate many of the morphological features, biological behavior, and gene-expression patterns of selected subtypes of ovarian cancer. Such models will likely prove useful for studying ovarian cancer biology and for preclinical testing of molecularly targeted therapeutics, which may ultimately lead to better clinical outcomes for women with ovarian cancer.
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Affiliation(s)
- Kathleen R Cho
- Departments of Pathology and Internal Medicine and the Comprehensive Cancer Center, University of Michigan Medical School, Ann Arbor, MI 48109, USA.
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Copy Number Changes in 1q21.3 and 1q23.3 have Different Clinical Relevance in Ovarian Tumors. Balkan J Med Genet 2009. [DOI: 10.2478/v10034-010-0009-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Copy Number Changes in 1q21.3 and 1q23.3 have Different Clinical Relevance in Ovarian TumorsMany studies have reported aberrations such as amplifications, deletions and translocations of 1q21-q23 in ovarian tumors. These findings increase the scientific interest in analyzing this region using specific gene probes. We investigated the frequency of copy number changes of two specific bacterial artificial chromosomes (BAC) clones in 1q21.3 and 1q23.3 by fluorescent in situ hybridization (FISH) on tissue microarrays consisting of 540 ovarian tumors of different malignancies, histology, stage and grade. Such changes in 1q21.3 were established in 9.64% of malignant (2.41% amplification), in 8.33% of low malignant potential (LMP) and in 13.13% of benign ovarian tumors. Copy number changes of 1q23.3 were found in 17.78% of malignant (1.48% amplification), in 16.67% of LMP and in 12.64% of benign ovarian tumors. We found a significantly higher gain of 1q23.3 in non epithelial (50%) compared to epithelial tumors (14.73%) (p <0.03). The gain of 1q21.3 prevailed in non serous malignant and LMP ovarian tumors in comparison to serous tumors. In non serous tumors, both gains were associated with higher grade. The frequency of gain in 1q23.3 was 2.5-times higher than that in 1q21.3 of ovarian cancers.
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Mayr D, Hirschmann A, Marlow S, Horvath C, Diebold J. Analysis of selected oncogenes (AKT1, FOS, BCL2L2, TGFbeta) on chromosome 14 in granulosa cell tumors (GCTs): a comprehensive study on 30 GCTs combining comparative genomic hybridization (CGH) and fluorescence-in situ-hybridization (FISH). Pathol Res Pract 2008; 204:823-30. [PMID: 18774655 DOI: 10.1016/j.prp.2008.07.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2008] [Revised: 07/17/2008] [Accepted: 07/23/2008] [Indexed: 10/21/2022]
Abstract
In previous studies, we have demonstrated a number of cytogenetic alterations in granulosa cell tumors (GCTs), especially on chromosomes X, 12, 14, and 22. However, little is known about specific loci on 14q, which could play an important role in tumor pathology. Therefore, we assessed four important genes in 30 GCTs using fluorescence-in situ-hybridization (FISH). Comparative genomic hybridization (CGH) was performed on paraffin-embedded material. Then, we applied FISH with gene-specific DNA probes for AKT1 (14q32.32), FOS (14q24.3), BCL2L2 (14q11.2-q12), and TGFbeta3 (14q24), and tried to find a correlation between CGH, FISH, tumor stage, and survival. In CGH, 7 of 30 cases (23.3%) showed complete gains on chromosome 14. FISH of the four loci revealed gains of hybridization signals in 8 of 30 cases (26.6%), indicating trisomy of the whole chromosome arm. The same aberration was detected by FISH in 2 of 30 cases (6.6%), which were negative using CGH. One case (1 of 30; 3.3%) was found to have a gain on chromosome 14 by CGH, which could not be confirmed by FISH. A correlation with tumor stage or survival could not be established. Our results suggest that GCTs may be characterized by trisomy of chromosome 14. A specific oncogene that could play a particular role in the tumorigenesis of GCTs was not identified on chromosome 14.
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Affiliation(s)
- Doris Mayr
- Department of Pathology, Ludwig-Maximilians-University of Munich, Thalkirchner Strasse 36, München, Germany.
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Nowee ME, Snijders AM, Rockx DAP, de Wit RM, Kosma VM, Hämäläinen K, Schouten JP, Verheijen RHM, van Diest PJ, Albertson DG, Dorsman JC. DNA profiling of primary serous ovarian and fallopian tube carcinomas with array comparative genomic hybridization and multiplex ligation-dependent probe amplification. J Pathol 2007; 213:46-55. [PMID: 17668415 DOI: 10.1002/path.2217] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Primary serous ovarian carcinoma (OVCA) and serous Fallopian tube carcinoma (FTC), both belonging to the BRCA-linked tumour spectrum, share many properties and are treated similarly. However, a detailed molecular comparison has been lacking. We hypothesized that comparative genomic studies of serous OVCAs and FTCs should point to gene regions critically involved in their tumorigenesis. Array comparative genomic hybridization (array CGH) analysis indicated that serous OVCAs and serous FTCs displayed common but also more distinctive patterns of recurrent changes. Targeted gene identification using a dedicated multiplex ligation-dependent probe amplification (MLPA) probe set directly identified EIF2C2 on 8q as a potentially important driver gene. Other previously unappreciated gained/amplified genes included PSMB4 on 1q, MTSS1 on 8q, TEAD4 and TSPAN9 on 12p, and BCAS4 on 20q. SPINT2 and ACTN4 on 19q were predominantly found in FTCs. Gains/amplifications of CCNE1 and MYC, often in conjunction with changes in genes of the AKT pathway, EVI1 and PTK2, seemed to be involved at earlier stages, whereas changes of ERBB2 were associated with advanced stages. The only BRCA1-mutated FTC shared common denominators with the sporadic tumours. In conclusion, the data suggest that serous OVCAs and FTCs, although related, exhibit differences in genomic profiles. In addition to known pathways, new genes/pathways are likely to be involved, with changes in an miRNA-associated gene, EIF2C2, as one important new feature. Dedicated MLPA sets constitute potentially important tools for differential diagnosis and may provide footholds for tailored therapy.
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Affiliation(s)
- M E Nowee
- Department of Obstetrics and Gynaecology, VU University Medical Center, Amsterdam, The Netherlands
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11
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Wojnarowicz PM, Breznan A, Arcand SL, Filali-Mouhim A, Provencher DM, Mes-Masson AM, Tonin PN. Construction of a chromosome 17 transcriptome in serous ovarian cancer identifies differentially expressed genes. Int J Gynecol Cancer 2007; 18:963-75. [PMID: 18028382 DOI: 10.1111/j.1525-1438.2007.01134.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Cytogenetic, molecular genetic, and functional analyses have implicated chromosome 17 genes in epithelial ovarian cancer (EOC). To further characterize the contribution of chromosome 17 genes in EOC, the Affymetrix U133A GeneChip was used to perform transcriptome analyses of 15 primary cultures of normal ovarian surface epithelial (NOSE) cells and 17 malignant ovarian tumor (TOV) samples of the serous histopathologic subtype. A two-way comparative analysis of 776 known genes and expressed sequences identified 253 genes that exhibited at least a threefold difference in expression in at least one TOV sample compared to the mean of NOSE samples. Within this data set, 99 of the 253 (39.1%) genes exhibited similar patterns of expression across all tested samples, suggesting a high degree of concordance in the chromosome 17 transcriptome. This observation was supported by hierarchical clustering analysis that segregated the TOV and NOSE samples into two separate groups. There were 77 genes that were differentially expressed in at least 50% of the TOV samples. Five genes (AdoRA(2B)at 17p12, CCL2 at 17q12, ACLY at 17q21.2, WIPI1 at 17q24.2, and SLC16A3 at 17q25.3) were significantly (P < 5.13E-11) differentially expressed at least threefold in all serous TOV samples, and all five genes were underexpressed in these TOV samples as compared to the NOSE samples. Interestingly, several of these differentially expressed genes have been previously associated with response to hypoxia.
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Affiliation(s)
- P M Wojnarowicz
- Department of Human Genetics, McGill University, Montreal, Canada
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12
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Kim SW, Kim JW, Kim YT, Kim JH, Kim S, Yoon BS, Nam EJ, Kim HY. Analysis of chromosomal changes in serous ovarian carcinoma using high-resolution array comparative genomic hybridization: Potential predictive markers of chemoresistant disease. Genes Chromosomes Cancer 2007; 46:1-9. [PMID: 17044060 DOI: 10.1002/gcc.20384] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
The mechanism of drug resistance in cancer is multifactorial, and the accumulation of multiple genetic changes may lead to drug-resistant phenotypes. This study sought to determine characteristic genetic changes in chemoresistant serous ovarian carcinomas using high-resolution array comparative genomic hybridization (aCGH), and identified genomic aberrations that could be used as predictive markers of chemoresistant disease. Seventeen primary ovarian tumors from optimally debulked stage IIIc serous ovarian carcinoma patients were analyzed using aCGH. Ten patients had chemoresistant disease (progression within 12 months of initial chemotherapy), whereas seven patients had chemosensitive disease (no recurrence for more than 36 months). Receiver operating characteristics curve analysis was used to select chromosomal aberrations that could help distinguish chemoresistant disease from chemosensitive disease. In 17 tumors, frequent increases in DNA copy number were seen on 1p36.33, 3q26.2, 8q24.3, 10q26.3, 12p11.21, 20q13.33, and 21q22.3, and frequent losses were observed on 4p12, 5q13.2, 7q11.21, 8p23.1, 14q32.33, Xq13.3, and Xq21.31. The gains on 5p15.33 and 14q11.2, and losses on 4q34.2, 4q35.2, 5q15, 8p21.1, 8p21.2, 11p15.5, 13q14.13, 13q14.2, 13q32.1, 13q34, 16q22.2, 17p11.2, 17p12, and 22q12.3 were more frequent in chemoresistant disease. The losses on 13q32.1 and 8p21.1 had the largest areas under the curve (AUC 0.90 and 0.85, respectively). The most reliable combination of chromosomal aberrations for detecting chemoresistant disease was the loss on 13q32.1 and 8p21.1 (AUC 0.950). Our findings suggest that these chromosomal aberrations are potential predictive markers of chemoresistant disease in patients with serous ovarian carcinomas.
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Affiliation(s)
- Sang Wun Kim
- Department of Obstetrics and Gynecology, Women's Cancer Clinic, Institute of Women's Life Science, Yonsei University College of Medicine, Seoul, Korea
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13
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Helou K, Padilla-Nash H, Wangsa D, Karlsson E, Osterberg L, Karlsson P, Ried T, Knutsen T. Comparative genome hybridization reveals specific genomic imbalances during the genesis from benign through borderline to malignant ovarian tumors. ACTA ACUST UNITED AC 2006; 170:1-8. [PMID: 16965948 DOI: 10.1016/j.cancergencyto.2006.04.010] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2005] [Revised: 04/07/2006] [Accepted: 04/11/2006] [Indexed: 10/24/2022]
Abstract
Ovarian cancer is one of the most common types of malignancy in women throughout the developed world. Despite recent therapeutic advances, long-term survival is poor because ovarian cancer is largely asymptomatic in its early stages. Comparative genomic hybridization (CGH) was applied to a series of 8 benign, 8 borderline, and 17 malignant ovarian to establish genomic imbalances associated with tumor progression. Benign and borderline tumors were characterized by losses at 1p32 approximately p11, 2q14 approximately q34, 4q13 approximately q34, 5q11 approximately q23, and 6q12 approximately q24, as well as gains of 6p and chromosome 12. Similar chromosomal changes were also detected in malignant tumors but included additional chromosomal changes: gains at 1q21 approximately q31, 2p, 3q, 5p, 7, 10p, 12p, 16p, 17, 19q, 20q, and 22q, as well as losses at X, 3p, 8p, 9, 11p, 13, 14, and 18. Some individual cases of benign and borderline tumors revealed no genetic alterations detectable by CGH, suggesting that these tumors may represent a subset of tumors that originate by an alternative mechanism of tumorigenesis. Furthermore, our findings reveal that borderline tumors are more similar to benign tumors than to malignant tumors with respect to their genetic profiles.
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Affiliation(s)
- Khalil Helou
- Department of Oncology, Institute of Clinical Sciences, Göteborg University, Blå Stråket 2, SE-413 45 Göteborg, Sweden.
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14
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Staebler A, Karberg B, Behm J, Kuhlmann P, Neubert U, Schmidt H, Korsching E, Bürger H, Lelle R, Kiesel L, Böcker W, Shih IM, Buchweitz O. Chromosomal losses of regions on 5q and lack of high-level amplifications at 8q24 are associated with favorable prognosis for ovarian serous carcinoma. Genes Chromosomes Cancer 2006; 45:905-17. [PMID: 16845658 DOI: 10.1002/gcc.20356] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
In this study, we describe characteristic chromosomal alterations in a consecutive series of 96 serous ovarian tumors by comparative genomic hybridization. We analyze their association with different pathways of progression, histological grade, and clinical outcome. The most striking difference between low-grade and high-grade serous carcinomas was seen in a higher incidence of chromosomal gains at 3q and 20q and losses of 13q in the high-grade carcinomas. In addition, high-level amplifications were significantly more frequent in high-grade carcinomas, specifically involving regions on 3q and 8q. Chromosomal amplifications of 19p and 19q and losses of 4q and 5q were among the most frequent changes found in both low-grade and high-grade carcinomas, distinguishing them from borderline tumors, which had very few recurrent alterations. The most significant impact on survival of patients with invasive carcinomas Stage II-IV was observed for high-level amplifications of regions on 8q (mean overall survival (OS) 69 versus 27 months, P = 0.0006). Interestingly, low-level gains on 8q do not show any impact compared to cases with no alteration. Surprisingly, chromosomal losses on 5q had a protective impact (mean OS 36 versus 76 months, P = 0.0007). Combination of both parameters resulted in two risk groups. Low risk: loss on 5q, no amplification on 8q (mean OS 84 months); high risk: no loss on 5q, amplification on 8q (mean OS 26 months). This difference is even more pronounced, if only cases with residual tumor of less than 2 cm are included, resulting in a 5-year survival of 100% and 0% (P = 0.0005).
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Affiliation(s)
- Annette Staebler
- Institute of Pathology, University of Muenster, Muenster, Germany.
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15
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Dimova I, Zaharieva B, Raitcheva S, Dimitrov R, Doganov N, Toncheva D. Tissue microarray analysis of EGFR and erbB2 copy number changes in ovarian tumors. Int J Gynecol Cancer 2006; 16:145-51. [PMID: 16445625 DOI: 10.1111/j.1525-1438.2006.00286.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
The objective of this study was to assess the implication of copy number changes of epidermal growth factor receptor (EGFR) and erbB2 genes in the etiology and progression of ovarian tumors. In our study, we used the highly reliable method of fluorescent in situ hybridization, applied on tissue microarray, containing 1006 ovarian tumors from different malignancy, histologic type and grade, and tumor stage, in order to analyze the correlations between gene copy number changes and tumor phenotype. We established copy number changes of erbB2 in 15.30% of malignant ovarian tumors-8.16% amplifications and 7.14% gains. The frequency of EGFR copy number changes was 10.67%-3.65% amplifications and 7.02% gains. EGFR gains occurred with approximately the same frequency in malignant (7.02%), low malignant potential (8.33%), and benign (7.19%) ovarian tumors. ErbB2 amplification was associated with clear cell type of ovarian cancer (P < 0.04). No amplification of EGFR and erbB2 genes was established in tumors with low malignant potency and in benign tumors. Regarding cancer phenotype, there was no statistically significant association between erbB2 copy number changes and histologic grade as well as tumor stage of ovarian cancer. EGFR gains are early events in ovarian tumorigenesis. Our results showed similar frequencies of EGFR gains in different grade tumors, while EGFR amplification increased from grades 1 to 2 to 3.
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Affiliation(s)
- I Dimova
- Department of Medical Genetics, Medical Faculty, Sofia, Bulgaria
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16
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Osterberg L, Levan K, Partheen K, Helou K, Horvath G. Cytogenetic analysis of carboplatin resistance in early-stage epithelial ovarian carcinoma. ACTA ACUST UNITED AC 2006; 163:144-50. [PMID: 16337857 DOI: 10.1016/j.cancergencyto.2005.06.023] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2005] [Revised: 06/23/2005] [Accepted: 06/28/2005] [Indexed: 11/17/2022]
Abstract
Ovarian carcinoma is the leading cause of death among women with gynecological malignancies in western Europe. The high mortality rate is largely due to drug resistance. It is thus essential to increase knowledge and understanding of the underlying mechanisms of chemotherapy resistance, which might be caused by changes in the tumor genome. After surgery, carboplatin is the standard treatment for patients with early-stage ovarian cancer. Using comparative genomic hybridization (CGH), we explored cytogenetic alterations in 63 early-stage epithelial ovarian tumors, comparing the aberration patterns in the carboplatin-resistant and carboplatin-sensitive tumors. Several chromosomal regions were more frequently altered in the resistant tumors; some of these differences were statistically significant. We also found differences in tumor histology. Gains of 1q, 5q14 approximately q23, and 13q21 approximately q32, and losses of 8p and 9q were associated with clinical carboplatin resistance. Also, differences were found between the primary resistant and the secondary resistant tumors. Our findings demonstrate biologic observations of clinical drug resistance and specifically reveal chromosomal regions of interest for platinum resistance.
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Affiliation(s)
- Lovisa Osterberg
- Department of Oncology, Institute of Selected Clinical Sciences, Göteborg University, SE-413 45 Göteborg, Sweden.
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17
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Byrne JA, Balleine RL, Schoenberg Fejzo M, Mercieca J, Chiew YE, Livnat Y, St Heaps L, Peters GB, Byth K, Karlan BY, Slamon DJ, Harnett P, Defazio A. Tumor protein D52 (TPD52) is overexpressed and a gene amplification target in ovarian cancer. Int J Cancer 2005; 117:1049-54. [PMID: 15986428 DOI: 10.1002/ijc.21250] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Recurrent chromosome 8q gain in ovarian carcinoma is likely to reflect the existence of multiple target loci, as the separate gain of chromosome bands 8q21 and 8q24 has been reported in independent studies. Since tumor protein D52 (TPD52) has been identified as a chromosome 8q21 amplification target in breast and prostate carcinoma, we compared TPD52 expression in normal ovarian epithelium (n = 9), benign serous adenomas (n = 11), serous borderline tumors (n = 6) and invasive carcinomas of the major histologic subtypes (n = 57) using immunohistochemistry. These analyses revealed that all normal ovarian epithelium samples and benign serous tumors were predominantly TPD52-negative, whereas TPD52 was overexpressed in most (44/57; 77%) ovarian carcinomas regardless of histologic subtype. TPD52 subcellular localization was predominantly cytoplasmic, although nuclear localization was also frequently observed in mucinous and clear cell carcinomas. In an independent cohort of stage III serous carcinomas (n = 18), we also directly compared in situ TPD52 expression using immunohistochemistry and TPD52 copy number using interphase FISH analyses. This revealed that TPD52 dosage and TPD52 expression were significantly positively correlated. TPD52 therefore represents a novel molecular marker in ovarian cancer, which is broadly expressed across the different histologic subtypes and whose upregulation frequently reflects increased TPD52 copy number.
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Affiliation(s)
- Jennifer A Byrne
- Molecular Oncology Laboratory, Oncology Research Unit, The University of Sydney Discipline of Paediatrics and Child Health, The Children's Hospital at Westmead, New South Wales, Australia.
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18
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Chariyalertsak S, Khuhaprema T, Bhudisawasdi V, Sripa B, Wongkham S, Petmitr S. Novel DNA amplification on chromosomes 2p25.3 and 7q11.23 in cholangiocarcinoma identified by arbitrarily primed polymerase chain reaction. J Cancer Res Clin Oncol 2005; 131:821-8. [PMID: 16180024 DOI: 10.1007/s00432-005-0031-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2005] [Accepted: 08/22/2005] [Indexed: 12/26/2022]
Abstract
PURPOSE To detect and characterize amplified DNA sequences in cholangiocarcinoma (CCA). PATIENTS AND METHODS We extracted DNA from tumor and corresponding normal tissues of 30 patients with CCA and amplified with 30 random ten-mer arbitrary primers by the arbitrarily primed polymerase chain reaction (AP-PCR) technique. RESULTS Our results showed gains of genomic sequences at high frequency. Using the AX-11 arbitrary primer, we determined an amplified DNA fragment occurred frequently in the tumors analyzed. The DNA fragment was isolated and identified as two sequences mapped to chromosomes 2p25.3 and 7q11.23. Specific primers were designed employing these sequences and used for detecting amplification by real-time quantitative PCR. The amplification of the DNA sequences on chromosomes 2p25.3 and 7q11.23 was detected in 10 (33%) and 6 (20%) cases, respectively. Thirteen (43%) cases showed amplification on both or one of the chromosomes. In addition, amplification of the DNA on chromosome 2p25.3 was predominantly observed in poorly differentiated tumors. CONCLUSIONS Our findings suggest that the novel amplified DNA on chromosomal regions at 2p25.3 and 7q11.23 might be involved in the development and progression of CCA.
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Affiliation(s)
- S Chariyalertsak
- Department of Tropical Nutrition and Food Science, Faculty of Tropical Medicine, Mahidol University, Rajvithi Road, Bangkok, 10400, Thailand
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19
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Chen CH, Shen J, Lee WJ, Chow SN. Overexpression of cyclin D1 and c-Myc gene products in human primary epithelial ovarian cancer. Int J Gynecol Cancer 2005; 15:878-83. [PMID: 16174239 DOI: 10.1111/j.1525-1438.2005.00150.x] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Cyclin D1 and c-Myc are key participants in the cell-cycle pathway, in which aberrancies have been associated with malignant transformation. To date, data on the relationship of expression of these proteins and histologic subtype of epithelial ovarian cancer are still scarce and discordant. Immunohistochemical analysis was performed on 12 normal ovaries and 47 cases of serous, mucinous, endometrioid, and clear cell ovarian carcinomas. No abnormal expression of cyclin D1 or c-Myc was demonstrated in any of the 12 normal ovarian specimens. However, compared to normal ovarian tissues, overexpression of cyclin D1 and c-Myc was observed in 42.6% (20/47) and 65.9% (31/47) of tumors examined, respectively. There was no significant difference of overexpression of cyclin D1 or c-Myc gene products between these four histologic subtypes of ovarian adenocarcinomas. This study shows that cyclin D1 and c-Myc are frequently overexpressed in epithelial ovarian carcinomas, but they are not correlated with a particular histologic subtype. Although our preliminary results need to be validated in a larger number of tumors, the abnormal expression of cyclin D1 and c-Myc in epithelial ovarian cancer reaffirms the notion that they are crucial components in the pathway of tumorigenesis and deserve further study.
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Affiliation(s)
- C-H Chen
- Department of Obstetrics and Gynecology, National Taiwan University Hospital and College of Medicine, National Taiwan University, Taipei, Taiwan
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20
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Lassus H, Sihto H, Leminen A, Nordling S, Joensuu H, Nupponen NN, Butzow R. Genetic alterations and protein expression of KIT and PDGFRA in serous ovarian carcinoma. Br J Cancer 2005; 91:2048-55. [PMID: 15583695 PMCID: PMC2409787 DOI: 10.1038/sj.bjc.6602252] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
KIT and PDGFRA are receptor tyrosine kinases that can be specifically inactivated by small-molecule tyrosine kinase inhibitors, notably imatinib mesylate. In ovarian carcinoma, expression of KIT and PDGFRA protein has been documented, but the frequency and the molecular background of expression are poorly known. We analysed the expression of KIT and PDGFRA by immunohistochemistry in 522 serous ovarian carcinomas, and mutations of KIT and PDGFRA by denaturing high-performance liquid chromatographyin 125 and 187 serous ovarian carcinomas, respectively. No mutations of KIT or PDGFRA were detected. KIT expression was detected in 12% of carcinomas: low expression in 10% and high expression in 2% of cases. Using normal serous epithelium as a reference, decreased PDGFRA expression was detected in 12% and increased expression in 13% of carcinomas. Both KIT and PDGFRA expression were associated with high tumour grade, high proliferation index and poor patient outcome. By fluorescence in situ hybridisation, no KIT amplification was found in carcinomas with high KIT expression, but two cases showed a relative gain of chromosome 4. In conclusion, no mutations of KIT or PDGFRA were found, but a subset of serous ovarian carcinoma showed overexpression of the proteins, which was associated with aggressive tumour characteristics.
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Affiliation(s)
- H Lassus
- Department of Obstetrics and Gynecology, Helsinki University Central Hospital, Haartmaninkatu 2, Helsinki 00290, Finland
| | - H Sihto
- Department of Oncology, Helsinki University Central Hospital, Haartmaninkatu 4, Helsinki 00290, Finland
| | - A Leminen
- Department of Obstetrics and Gynecology, Helsinki University Central Hospital, Haartmaninkatu 2, Helsinki 00290, Finland
| | - S Nordling
- Department of Pathology, University of Helsinki, PO Box 21 (Haartmaninkatu 3), Helsinki 00014, Finland
| | - H Joensuu
- Department of Oncology, Helsinki University Central Hospital, Haartmaninkatu 4, Helsinki 00290, Finland
| | - N N Nupponen
- Department of Oncology, Helsinki University Central Hospital, Haartmaninkatu 4, Helsinki 00290, Finland
| | - R Butzow
- Department of Obstetrics and Gynecology, Helsinki University Central Hospital, Haartmaninkatu 2, Helsinki 00290, Finland
- Department of Pathology, University of Helsinki, PO Box 21 (Haartmaninkatu 3), Helsinki 00014, Finland
- Department of Obstetrics and Gynecology, Helsinki University Central Hospital, Haartmaninkatu 2, Helsinki 00290, Finland. E-mail:
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21
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Lambros MBK, Fiegler H, Jones A, Gorman P, Roylance RR, Carter NP, Tomlinson IPM. Analysis of ovarian cancer cell lines using array-based comparative genomic hybridization. J Pathol 2005; 205:29-40. [PMID: 15586366 DOI: 10.1002/path.1681] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
In this study, 23 ovarian cancer cell lines were screened using array-comparative genomic hybridization (aCGH) based on large-insert clones at about 1 Mb density from throughout the genome. The most frequent recurrent changes at the level of the chromosome arm were loss of chromosome 4 or 4q, loss of 18q and gain of 20 or 20q; other recurrent changes included losses of 6q, 8p, 9p, 11p, 15q, 16q, 17p, and 22q, and gain of 7q. Losses of 4q and 18q occurred together more often than expected. Evidence was found for two types of ovarian cancer, one typically near-triploid and characterized by a generally higher frequency of chromosomal changes (especially losses of 4p, 4q, 13q, 15q, 16p, 16q, 18p and 18q), and the other typically near-diploid/tetraploid and with fewer changes overall, but with relatively high frequencies of 9p loss, 9q gain, and 20p gain. Multiple novel changes (amplifications, homozygous deletions, discrete regions of gain or loss, small overlapping regions of change and frequently changed clones) were also detected, each of which might indicate the locations of oncogenes or tumour suppressor loci. For example, at least two regions of amplification on chromosome 11q13, one including cyclin D1 and the other the candidate oncogene PAK1, were found. Amplification on 11q22 near the progesterone receptor gene and a cluster of matrix metalloproteinase loci was also detected. Other potential oncogenes, which mapped to regions found by this study, included cyclin E and PIK3C2G. Candidate tumour suppressor genes in regions of loss included CDKN2C, SMAD4-interacting protein and RASSF2.
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Affiliation(s)
- Maryou B K Lambros
- Molecular and Population Genetics Laboratory, Cancer Research UK, London, UK
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22
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Partheen K, Levan K, Osterberg L, Helou K, Horvath G. Analysis of cytogenetic alterations in stage III serous ovarian adenocarcinoma reveals a heterogeneous group regarding survival, surgical outcome, and substage. Genes Chromosomes Cancer 2004; 40:342-8. [PMID: 15188458 DOI: 10.1002/gcc.20053] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Ovarian cancer is the leading cause of death among patients with gynecological cancers, but the biology of these tumors is still among the least understood of all major human malignancies. In this study, comparative genomic hybridization was used to determine chromosomal alterations in 98 stage III serous papillary adenocarcinomas. The tumors were grouped according to survival and the main prognostic factors stage and surgical outcome. There were chromosomal imbalances that were significantly more common in tumors from patients who died than in tumors from patients who survived: gains of 1q24-qter and losses of 4p, 4q31.1-qter, 5q12-q22, 8p, 16q, and X. Furthermore, we observed that gains of 8q23-8q24.2 and losses of 4p, 4q13-4q26, 4q31.1-qter, 5q12-q22, 8p, and 16q were significantly more common in tumors from patients with macroscopic residual tumor after primary surgery, compared to tumors from those who had undergone radical surgery. Gains of 3q13.3-qter, 6p, 7q21-q31, and 11q13-q23 and losses of 4q31.1-qter and 16q were more common in stage IIIc tumors than in stage IIIa+b tumors. On the basis of our results, we suggest that there are biological differences among the groups mentioned above and that absence of chromosomal aberrations in specific regions predicts a good clinical outcome for individual patients.
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23
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Micci F, Teixeira MR, Haugom L, Kristensen G, Abeler VM, Heim S. Genomic aberrations in carcinomas of the uterine corpus. Genes Chromosomes Cancer 2004; 40:229-46. [PMID: 15139002 DOI: 10.1002/gcc.20038] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Endometrial carcinoma, the most common invasive neoplasm of the female genital tract, occurs either in a hormone-related, less virulent form (type I) or in a hormone-independent, more aggressive form (type II). Another cancer of the uterine corpus is carcinosarcoma, a biphasic or mixed epithelial-mesenchymal tumor, now classified as metaplastic carcinoma. We examined by karyotyping and comparative genomic hybridization a consecutive series of 67 endometrial carcinomas and 15 carcinosarcomas and compared the cytogenetic features of the different carcinoma subtypes. All three subtypes of uterine carcinoma had in common a nonrandom gain of material from 1q and 8q but differed from one another in other respects. Endometrial carcinomas of type I mostly presented gains from chromosome arms 1q and 8q and losses from Xp, 9p, 9q, 17p, 19p, and 19q, whereas endometrial carcinomas of type II showed a more complex imbalance picture, with gains from chromosome arms 1q, 2p, 3q, 5p, 6p, 7p, 8q, 10q, and 20q and losses from Xq, 5q, and 17p. The carcinosarcomas mostly showed gains of or from 1q, 5p, 8q, and 12q but losses from 9q, that is, they were much more similar to endometrial carcinomas in their pattern of acquired genomic changes than to sarcomas of the uterine corpus. It was also possible to identify different copy number changes among the different grades of type I carcinomas, between serous papillary and clear-cell carcinomas of type II, as well as between homologous and heterologous carcinosarcomas. Specifically, type I adenocarcinomas that were highly differentiated mostly showed gains from 1q and 10p; those that were moderately differentiated showed gains from 1q, 7p, 7q, and 10q as well as losses from Xp, 9p, 9q, 17p, 19p, and 19q; whereas those poorly differentiated showed gains from 1q, 2p, 2q, 3q, 6p, 8q, and 20q but losses from Xp, Xq, 5q, 9p, 9q, 17p, and 17q. The serous papillary carcinomas showed gains from 1q, 2p, 2q, 3q, 5p, 6p, 6q, 7p, 8q, 18q, 20p, and 20q but losses from 17p, whereas the clear-cell carcinomas showed gains from 3q, 7p, 8q, 10q, 16p, and 20q but losses from 6q. Finally, the homologous carcinosarcomas presented gains from 1p, 1q, 8q, 12q, and 17q as well as losses from 9q and 13q, whereas the heterologous tumors showed gains from 1q, 8p, and 8q. The reproducibility of the observed correlations between karyotypic aberration patterns and histological differentiation was underscored by the fact that those carcinosarcomas whose epithelial component resembled type I endometrial carcinomas also exhibiting a type I aberration profile, whereas carcinosarcomas with a type II carcinoma differentiation had karyotypic abnormalities similar to those of type II endometrial carcinomas.
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Affiliation(s)
- Francesca Micci
- Department of Cancer Genetics, The Norwegian Radium Hospital, Oslo, Norway
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Wang PH. Altered Sialylation and Sialyltransferase Expression in Gynecologic Cancers. Taiwan J Obstet Gynecol 2004. [DOI: 10.1016/s1028-4559(09)60057-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
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25
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Acs G, Pasha T, Zhang PJ. WT1 is Differentially Expressed in Serous, Endometrioid, Clear Cell, and Mucinous Carcinomas of the Peritoneum, Fallopian Tube, Ovary, and Endometrium. Int J Gynecol Pathol 2004; 23:110-8. [PMID: 15084838 DOI: 10.1097/00004347-200404000-00004] [Citation(s) in RCA: 152] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The Wilms' tumor gene WT1 plays complex roles in the development of the organs of the genitourinary tract and mesothelium, as well as Wilms' tumors. Although its biologic role is still unclear, most serous carcinomas of the ovary and peritoneum, mesotheliomas, and Wilms' tumor have been shown to express WT1. A recent study, however, found no WT1 expression in serous carcinomas of the endometrium, suggesting that WT1 could be useful in identifying the primary site of serous carcinomas. We examined the expression of WT1 and p53 by immunohistochemistry in 69 cases of endometrial carcinoma (35 endometrioid, 18 clear cell, 16 serous), 68 cases of ovarian carcinoma (28 serous, 11 endometrioid, 18 clear cell, and 11 mucinous), 14 fallopian tube carcinomas (12 serous, 2 endometrioid), and 20 primary peritoneal serous carcinomas. WT1 nuclear reactivity of any extent and intensity was considered positive. Immunohistochemical stains were evaluated semiquantitatively using a four-tiered scale. Among endometrial carcinomas, WT1 immunoreactivity was seen in 10 of 16 serous, but in none of 35 endometrioid or 18 clear cell carcinomas. Among ovarian tumors, WT1 expression was seen in 24 of 28 serous and 4 of 18 clear cell carcinomas, but in none of 11 endometrioid and 11 mucinous tumors. All 12 serous carcinomas but none of 2 endometrioid carcinomas of the fallopian tube were positive for WT1. WT1 expression was seen in 19 of 20 serous primary peritoneal carcinomas. The difference in WT1 expression was highly significant between serous and other types of tumors in all sites (p<0.0001, chi-square test), although the level of WT1 expression was significantly different among serous carcinomas arising at different sites (p<0.0001, Kruskal-Wallis test). A significant positive correlation was found between the level of p53 and WT1 expression in all carcinomas combined (r = 0.3935, p<0.0001, Spearman test), but when only serous carcinomas were analyzed, the correlation between p53 and WT1 expression levels did not reach statistical significance. Our results suggest that WT1 expression in epithelial tumors of the female genital tract may be related to cell differentiation and histologic subtypes of carcinomas, rather than to primary site of origin.
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Affiliation(s)
- Geza Acs
- Department of Pathology and Laboratory Medicine, University of Pennsylvania Medical Center, Philadelphia, Pennsylvania 19104, USA
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26
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Lassus H, Leminen A, Lundin J, Lehtovirta P, Butzow R. Distinct subtypes of serous ovarian carcinoma identified by p53 determination☆☆☆☆☆Supplementary data associated with this article can be found at doi: 10.1016/S0090-8258(03)00608-5. Gynecol Oncol 2003; 91:504-12. [PMID: 14675668 DOI: 10.1016/j.ygyno.2003.08.034] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
OBJECTIVE The overall prognosis of ovarian carcinoma is poor. However, the outcome of apparently similar cases is highly variable, and molecular markers that would predict disease outcome in a clinically useful manner are lacking. We investigated the value of p53 expression as a disease determinant in serous carcinoma, which is the most common type of ovarian carcinoma and has shown the highest frequency of p53 alterations. METHODS Tissue microarray constructed of 522 serous ovarian carcinomas was examined immunohistochemically using DO-7 monoclonal antibody against p53 protein. The findings were correlated with overall and disease-free survival, response to therapy, and clinicopathological characteristics of the patients. RESULTS Both excessive and completely negative p53 staining confered poor patient outcome and were considered aberrant p53 expression. Patients with aberrant p53 (59% of the carcinomas) showed 5-year overall survival of 26% (20-31%), whereas patients with normal p53 expression (41% of the carcinomas) showed 5-year overall survival of 79% (95% CI, 74-85%) (P < 0.0001). The association of aberrant p53 with poor prognosis was independent of clinicopathological parameters, e.g., stage and grade. In addition, aberrant p53 status was significantly associated with shorter disease-free survival (P < 0.0001) and poor response to therapy (P < 0.0001). In the most common subgroups, stage III and stage I carcinomas, 5-year overall survival rates for patients showing normal p53 vs. aberrant p53 were 72% vs. 19% (P < 0.0001) and 99% vs. 56% (P < 0.0001), respectively. CONCLUSION P53 expression status divides serous ovarian carcinomas into two distinct subtypes: one with a relatively good prognosis and the other with a particularly poor outcome.
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Affiliation(s)
- Heini Lassus
- Department of Obstetrics and Gynecology, Helsinki University Central Hospital, Haartmaninkatu 2, 00290, Helsinki, Finland
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Hamilton TC, Connolly DC, Nikitin AY, Garson K, Vanderhyden BC. Translational research in ovarian cancer: a must. Int J Gynecol Cancer 2003; 13 Suppl 2:220-30. [PMID: 14656284 DOI: 10.1111/j.1525-1438.2003.13350.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Ovarian cancer discovered at late clinical stage continues to be a fatal disease. It seems self-evident that if we are to make an impact on the survival of advanced ovarian cancer patients, we must begin to understand the disease more completely. This should improve the diagnosis of the disease at an early stage when it is curable by surgery or develop better/targeted drug treatments. Modern molecular techniques have provided insights into many of the molecular changes that occur when ovarian cancer develops, but one must understand that changes seen in this way can only be said to correlate with disease. It would be helpful to have a way to test candidate changes for causality. In many cancer types, genetically engineered animals are beginning to be used for this purpose and as a means to study the disease process in greater detail. To date, there has been no way to study ovarian cancer by this means. Efforts to model human ovarian cancer have been delayed by a general lack of understanding both of the disease process in humans and of the cells widely believed to be the precursors of epithelial ovarian cancer, the ovarian surface epithelial (OSE) cells. Here, we present recent progress in modeling ovarian cancer using genetically modified mice.
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Affiliation(s)
- T C Hamilton
- Fox Chase Cancer Center, Philadelphia, PA 19111, USA.
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Moilanen J, Lassus H, Leminen A, Vaheri A, Bützow R, Carpén O. Ezrin immunoreactivity in relation to survival in serous ovarian carcinoma patients. Gynecol Oncol 2003; 90:273-81. [PMID: 12893187 DOI: 10.1016/s0090-8258(03)00262-2] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
OBJECTIVE Ezrin is a membrane-cytoskeleton linker protein, which regulates cell polarity and signaling. Increased ezrin expression in astrocytomas and uveal melanomas is correlated with unfavorable prognostic factors and reduced patient survival. We investigated ezrin IR in normal ovarian surface epithelium and serous ovarian carcinomas, and its relation with clinical parameters and patient outcome. METHODS Tissue microarray blocks were constructed of all serous ovarian carcinoma tissue samples removed at a primary operation in Helsinki University Central Hospital between 1964 and 1999 and of healthy ovarian tissue samples. Ezrin expression was assessed by indirect immunohistochemistry using a monoclonal 3C12 ezrin antibody. Tissue samples (n = 440) were scored for the intensity of ezrin immunoreactivity, and the scores were compared with patient age, the stage and grade of disease, and disease outcome. RESULTS Healthy ovarian epithelium showed strong polarized ezrin immunoreactivity. In serous ovarian carcinoma, the reactivity varied from strong (15.0% of samples) to moderate (57.3%) or weak/negative (27.7%) and the subcellular distribution was typically diffuse. Weak or negative expression of ezrin was associated with shorter survival (P = 0.027) but also with an advanced age of the patients (P = 0.0001), and a higher histological grade of the disease (P = 0.032). In Cox multivariate survival analysis, ezrin immunoreactivity had no independent effect on survival, when controlling for the stage and grade of the disease, and patient age. CONCLUSIONS In contrast with astrocytomas and uveal melanomas, negative or weak ezrin immunoreactivity in serous ovarian carcinoma correlates with poor patient outcome.
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Affiliation(s)
- Jarna Moilanen
- Department of Obstetrics and Gynecology, Helsinki University Central Hospital, Helsinki, Finland
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30
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Hu J, Khanna V, Jones MW, Surti U. Comparative study of primary and recurrent ovarian serous carcinomas: comparative genomic hybridization analysis with a potential application for prognosis. Gynecol Oncol 2003; 89:369-75. [PMID: 12798697 DOI: 10.1016/s0090-8258(03)00056-8] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
OBJECTIVES The purpose of this study is to comparatively characterize genomic imbalances in primary and recurrent ovarian serous carcinomas and to identify genomic alterations that may be used as a marker for prognosis. METHODS Twenty ovarian serous carcinomas were studied by comparative genomic hybridization (CGH). RESULTS Genomic alterations were found in all of the tumors. The most common regions involving gain of DNA copy numbers are 1q41q44, 8q22q24, 19p12q13.1, 20q12q13, 3q26q29, 12p12p13, 2p22p25, 7p14p21, 5p15.2p15.3, and 17q22q25. The most common regions with loss of DNA copy numbers are Xp11.2q13, 4q31q35, Xp21p22.3, 18q22q23, 13q22q31, 9p22p24, and 16q22q24. High-level gains were detected at chromosomal regions of 1q41q44, 2p22p25, 3q26q29, and 19p12q13.1. Comparative analysis of primary and recurrent tumors showed that gains of 2p22p25, 19p12q13.1, and 20q12q13 and loss of 5q14q22 were more common in the recurrent high-grade tumors. About 85% of the tumors showed increases in DNA copy numbers in the regions (2p and 8q) harboring the myc family gene. Patients with tumor containing fewer than seven chromosomal aberrations showed longer survival time. CONCLUSION The myc oncogene family may play a role in the pathogenesis of ovarian serous carcinomas. Our study suggests that tumors with gains of 2p22p25, 19p12q13.1, and 20q12q13 and loss of 5q14q22 may be at high risk for recurrence. Furthermore, the patients' survival time inversely correlates with the numbers of chromosomal alterations found in their tumors. CGH analysis may have a clinical application in predicting prognosis and risk of recurrence in patients with ovarian serous carcinomas.
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Affiliation(s)
- J Hu
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of Pittsburgh, Pittsburgh, PA 15260, USA.
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Dent J, Hall GD, Wilkinson N, Perren TJ, Richmond I, Markham AF, Murphy H, Bell SM. Cytogenetic alterations in ovarian clear cell carcinoma detected by comparative genomic hybridisation. Br J Cancer 2003; 88:1578-83. [PMID: 12771925 PMCID: PMC2377123 DOI: 10.1038/sj.bjc.6600896] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Ovarian clear cell carcinoma (OCCC) accounts for a small but significant proportion of all ovarian cancers and is a distinct clinical and pathological entity. It tends to be associated with poorer response rates to chemotherapy and with a worse prognosis. Little is known about possible underlying genetic changes. DNA extracted from paraffin-embedded samples of 18 pure OCCC cases was analysed for genetic imbalances using comparative genomic hybridisation (CGH). All of the 18 cases showed genomic alterations. The mean number of alterations detected by CGH was 6 (range 1-15) indicating a moderate level of genetic instability. Chromosome deletions were more common than amplifications. The most prominent change involved chromosome 9 deletions in 10 cases (55%). This correlates with changes seen in other epithelial ovarian cancers. This deletion was confirmed using microsatellite markers to assess loss of heterozygosity (LOH) at four separate loci on chromosome 9. The most distinct region of loss detected was around the IFNA marker at 9p21 with 41% (11 out of 27 cases) LOH. Other frequent deletions involved 1p (five out of 18; 28%); 11q (four out of 18; 22%) and 16 (five out of 18; 28%). Amplification was most common at chromosome 3 (six out of 18; 33%); 13q (four out of 18; 22%) and 15 (three out of 18; 17%). No high-level amplifications were identified. These features may serve as useful prognostic indicators in the management of OCCC.
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Affiliation(s)
- J Dent
- Cancer Research UK Clinical Cancer Centre in Leeds, St James's University Hospital, Leeds LS9 7TF, UK.
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Gray JW, Suzuki S, Kuo WL, Polikoff D, Deavers M, Smith-McCune K, Berchuck A, Pinkel D, Albertson D, Mills GB. Specific keynote: genome copy number abnormalities in ovarian cancer. Gynecol Oncol 2003; 88:S16-21; discussion S22-4. [PMID: 12586079 DOI: 10.1006/gyno.2002.6677] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Joe W Gray
- University of California, Los Angeles, USA
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Mills GB, Fang X, Lu Y, Hasegawa Y, Eder A, Tanyi J, Tabassam FH, Mao M, Wang H, Cheng KW, Nakayama Y, Kuo W, Erickson J, Gershenson D, Kohn EC, Jaffe R, Bast RC, Gray J. Specific keynote: molecular therapeutics in ovarian cancer. Gynecol Oncol 2003; 88:S88-92; discussion S93-6. [PMID: 12586094 DOI: 10.1006/gyno.2002.6692] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Hu J, Khanna V, Jones MMW, Surti U. Genomic imbalances in ovarian borderline serous and mucinous tumors. CANCER GENETICS AND CYTOGENETICS 2002; 139:18-23. [PMID: 12547152 DOI: 10.1016/s0165-4608(02)00603-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We analyzed 25 ovarian borderline tumors (13 serous and 12 mucinous tumors) by comparative genomic hybridization (CGH). Genomic imbalance was detected in 85% of serous tumors and 75% of mucinous tumors. Different patterns of genomic alterations were identified in serous and mucinous tumors. Gain of the X chromosome was common in both serous (30%) and mucinous (42%) tumors. However, gain of chromosome 8 was detected exclusively in 38% of serous and mixed sero-mucinous tumors, but not in any pure mucinous tumors. According to the present and previous studies, gain of chromosome 8 is the most common abnormality in borderline serous tumors. Gain of the same chromosome is also common in high grade and advanced stage serous carcinomas, but uncommon in early stage serous carcinomas. In addition gain of chromosome X is common in borderline serous and mucinous tumors, while loss of chromosome X is predominant in invasive carcinomas. These findings do not support the multi-step progression theory from borderline tumor to high-grade, advanced stage carcinoma, but indicate that the borderline ovarian tumor is a distinct entity. Genes in chromosome 8 may be critical for the development and the differentiation of borderline serous tumors.
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Affiliation(s)
- Jie Hu
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of Pittsburgh, School of Medicine, Pittsburgh, PA 15213, USA
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Abstract
Clinical and cancer cytogenetics is a rapidly evolving discipline. The past decade has seen a dramatic change in molecular biology and fluorescence microscopy. The use of fluorescence in situ hybridization (FISH) technologies has enabled the rapid analysis of cytogenetic specimens as an adjunct to classical cytogenetic analysis. Spectral karyotyping (SKY) is a 24-color, multi-chromosomal painting assay that allows the visualization of all human chromosomes in one experiment. The ability for SKY analysis to detect equivocal or complex chromosomal rearrangements, as well as to identify the chromosomal origins of marker chromosomes and other extra-chromosomal structures, makes this a highly sensitive and valuable tool for identifying recurrent chromosomal aberrations. The SKY has been applied to various tumor groups including hematological malignancies, sarcomas, carcinomas and brain tumors, with the intent of identifying specific chromosomal abnormalities that may provide insight to the genes involved in the disease process as well as identifying recurrent cytogenetic markers for clinical diagnosis and prognostic assessment. The SKY has also been applied for the mouse genome, enabling investigators to extrapolate information from mouse models of cancer to their human counterparts. This review will address the advances that SKY has facilitated in the field of cancer cytogenetics, as well as its variety of application in the cancer research laboratories.
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Affiliation(s)
- Jane M Bayani
- Ontario Cancer Institute, Princess Margaret Hospital, University Health Network, Ontario, Toronto, Canada M5G 2M9
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Hauptmann S, Denkert C, Koch I, Petersen S, Schlüns K, Reles A, Dietel M, Petersen I. Genetic alterations in epithelial ovarian tumors analyzed by comparative genomic hybridization. Hum Pathol 2002; 33:632-41. [PMID: 12152163 DOI: 10.1053/hupa.2002.124913] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The genetic changes involved in the pathogenesis of ovarian carcinoma are not completely understood. To investigate this matter, we studied paraffin-embedded, microdissected tissue of 47 ovarian epithelial tumors (9 adenomas, 11 tumors of low malignant potential [LMP], 14 serous carcinomas, and 13 nonserous carcinomas) using comparative genomic hybridization (CGH). (The primary data used in this study are available at our CGH online tumor database at http://amba.charite.de/cgh.) Chromosomal imbalances were found in 1 serous adenoma and in 7 LMP tumors. In the latter the alterations appeared randomly and showed no overlap with alterations found in invasive carcinomas. Although the mean aberration number of low-grade serous carcinomas was comparable to LMP tumors, the imbalances of the former occurred with high incidence (>50%) and were found at different localizations. High-grade serous carcinomas had more than twice as much chromosomal imbalances as low-grade serous carcinomas and also had pronounced alterations. In serous carcinomas, gains were found on 3q, 6p, 7, 8q, and 20, and losses were found on 4q, 6q, 12q, 13q, and 16q. Comparing serous and nonserous carcinomas, the mean aberration number was comparable, but the number of high incidence changes was lower, and the most frequent imbalances were losses on 13q and gains on 20p. Overlapping alterations occurring in serous and nonserous carcinomas were gains on 3q and 6p, as well as losses on 4q. Chromosomal imbalances associated with poor prognosis of ovarian carcinomas were gains on 6p, 7q, and 13q and losses on 15q, 17p, 18q, and 21q. Our data indicate that serous LMP tumors and invasive carcinomas have different genetic aberrations, indicating that invasive carcinomas do not arise from preexisting serous LMP tumors. On the other hand, there are common genetic abnormalities in serous and nonserous carcinomas, suggesting that they have very early lesions in common but take different paths of further development.
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MESH Headings
- Adenoma/genetics
- Adult
- Aged
- Aged, 80 and over
- Carcinoma/genetics
- Chromosome Aberrations
- Chromosomes, Human, Pair 12
- Chromosomes, Human, Pair 13
- Chromosomes, Human, Pair 16
- Chromosomes, Human, Pair 20
- Chromosomes, Human, Pair 3
- Chromosomes, Human, Pair 4
- Chromosomes, Human, Pair 6
- Chromosomes, Human, Pair 7
- Chromosomes, Human, Pair 8
- Cystadenocarcinoma, Serous/genetics
- Cystadenoma, Serous/genetics
- Female
- Humans
- Middle Aged
- Nucleic Acid Hybridization
- Ovarian Neoplasms/genetics
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Affiliation(s)
- Steffen Hauptmann
- Institute of Pathology and Department of Gynecology and Obstetrics, Charité Hospital Berlin, Germany
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Struski S, Doco-Fenzy M, Cornillet-Lefebvre P. Compilation of published comparative genomic hybridization studies. CANCER GENETICS AND CYTOGENETICS 2002; 135:63-90. [PMID: 12072205 DOI: 10.1016/s0165-4608(01)00624-0] [Citation(s) in RCA: 105] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The power of comparative genomic hybridization (CGH) has been clearly proven since the first paper appeared in 1992 as a tool to characterize chromosomal imbalances in neoplasias. This review summarizes the chromosomal imbalances detected by CGH in solid tumors and in hemopathies. In May of 2001, we took a census of 430 articles providing information on 11,984 cases of human solid tumors or hematologic malignancies. Comparative generic hybridization has detected a number of recurrent regions of amplification or deletion that allows for identification of new chromosomal loci (oncogenes, tumor suppressor genes, or other genes) involved in the development, progression, and clonal evolution of tumors. When CGH data from different studies are combined, a pattern of nonrandom genetic aberrations appears. As expected, some of these gains and losses are common to different types of pathologies, while others are more tumor-specific.
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Affiliation(s)
- Stéphanie Struski
- Laboratoire d'Hématologie, Hôpital Robert Debré-CHU Reims, Reims, France
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Tapper J, Kettunen E, El-Rifai W, Seppälä M, Andersson LC, Knuutila S. Changes in gene expression during progression of ovarian carcinoma. CANCER GENETICS AND CYTOGENETICS 2001; 128:1-6. [PMID: 11454421 DOI: 10.1016/s0165-4608(01)00386-7] [Citation(s) in RCA: 104] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The molecular events leading to the development and progression of serous ovarian carcinoma are not completely understood. We performed a large scale survey for the identification of differentially expressed genes in serous ovarian carcinoma by using cDNA array analysis. Differences in gene expression between serous adenocarcinoma and benign serous adenoma, and between advanced and/or moderately or poorly differentiated and local, highly differentiated serous adenocarcinoma were assessed. The most striking difference between adenocarcinoma and benign adenoma was upregulation of RHOGDI2 in the carcinomas irrespective of the clinical tumor stage. Other changes in carcinoma were upregulation of MET and Ne-dlg, and downregulation of HGFAC, desmin, and PDGFA. The most prominent differences between advanced and local adenocarcinoma were upregulation of COL3A1, CFGR, and MET in advanced carcinoma, and downregulation of HGFAC, FZD3, and BFL1 in the same tumors. In conclusion, significant differences were found in the gene expression between benign and malignant serous ovarian tumors, and between local, highly differentiated and advanced and/or moderately or poorly differentiated serous adenocarcinomas. The differentially expressed genes may be related to the carcinogenesis and progression of the malignant growth.
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Affiliation(s)
- J Tapper
- Department of Obstetrics and Gynecology, Helsinki University Central Hospital, P.O. Box 140, Haartmaninkatu 2, FIN-00029 HUS, Helsinki, Finland
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Lassus H, Salovaara R, Aaltonen LA, Butzow R. Allelic analysis of serous ovarian carcinoma reveals two putative tumor suppressor loci at 18q22-q23 distal to SMAD4, SMAD2, and DCC. THE AMERICAN JOURNAL OF PATHOLOGY 2001; 159:35-42. [PMID: 11438451 PMCID: PMC1850432 DOI: 10.1016/s0002-9440(10)61670-7] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The distal half of chromosome arm 18q is frequently lost in ovarian carcinoma. To define the putative tumor suppressor locus/loci more precisely we performed allelic analysis with 27 polymorphic microsatellite markers located at 18q12.3-q23 in 64 serous and 9 mucinous ovarian carcinomas. Fifty-nine percent of the serous carcinomas, but only one (11%) of mucinous carcinomas, showed allelic loss at one or more loci (P = 0.018). In serous carcinomas, deletions were found to be associated with tumor grade and poor survival. The highest frequency of losses was detected at the distal part, 18q22-q23. Two minimal common regions of loss (MCRL) were identified at this region: MCRL1 between D18S465 and D18S61 at 18q22 (3.9 cM) and MCRL2 between D18S462 and D18S70 at 18q23 (5.8 cM). At 18q21.1, proximal to the MCRLs, there are three candidate tumor suppressor genes: SMAD4 (DPC4), SMAD2, and DCC. Their protein expression was studied by immunohistochemistry in normal ovarian tissue and serous carcinomas. Lost or very weak expression of SMAD4, SMAD2 and DCC was found in 28, 28, and 30% of serous carcinomas, respectively. Comparison of allelic loss and protein expression status indicated that none of these genes alone could be the target for the frequent allelic loss at 18q21.1. Together, these genes may account for a substantial proportion of the events, but not all of them. Thus, we propose that the frequent allelic loss at 18q is because of the effect of multiple genes, and there is at least one as yet unidentified tumor suppressor gene at 18q residing distal to SMAD4, SMAD2, and DCC involved in serous ovarian carcinoma.
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Affiliation(s)
- H Lassus
- Department of Obstetrics and Gynecology, Helsinki University Central Hospital, University of Helsinki, Helsinki, Finland
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40
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Sarantaus L, Vahteristo P, Bloom E, Tamminen A, Unkila-Kallio L, Butzow R, Nevanlinna H. BRCA1 and BRCA2 mutations among 233 unselected Finnish ovarian carcinoma patients. Eur J Hum Genet 2001; 9:424-30. [PMID: 11436123 DOI: 10.1038/sj.ejhg.5200652] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2000] [Revised: 03/12/2001] [Accepted: 03/13/2001] [Indexed: 11/09/2022] Open
Abstract
Germline mutations of BRCA1 and BRCA2 predispose to hereditary breast-ovarian cancer syndrome. In Finland, 20 different BRCA1/2 mutations have been identified, and 13 of them are founder mutations that account for the vast majority of Finnish BRCA1/2 families. The purpose of our study was to determine the prevalence of BRCA1/2 mutations in unselected Finnish ovarian carcinoma patients and to evaluate the relationship between mutation carrier status and personal/family history of cancer. Two hundred and thirty-three patients were screened for all the 20 BRCA1/2 mutations known in the Finnish population. Additionally, a subgroup of patients with personal history of breast cancer and/or family history of breast and/or ovarian cancer was screened for novel BRCA1/2 mutations. Thirteen patients (5.6%) had mutations: eleven in BRCA1 and two in BRCA2. All the mutation-positive patients were carriers of the previously known Finnish BRCA1/2 mutations, and seven recurrent founder mutations accounted for 12 of the 13 mutations detected. A logistic regression analysis was used to determine the odds of mutation for ovarian carcinoma patients. The most significant predictor of a mutation was the presence of both breast and ovarian cancer in the same woman, but family history of breast cancer was also strongly related to mutation carrier status. Although BRCA1/2 mutation testing is not warranted in the general Finnish ovarian cancer patient population, patients who have also been diagnosed with breast cancer or have family history of breast or breast and ovarian cancer could benefit from referral to genetic counselling and mutation testing.
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Affiliation(s)
- L Sarantaus
- Department of Obstetrics and Gynecology, Helsinki University Central Hospital, Biomedicum Helsinki, P.O. Box 700 (Haartmaninkatu 8), FIN-00029 HUS, Finland
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41
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Lassus H, Laitinen MP, Anttonen M, Heikinheimo M, Aaltonen LA, Ritvos O, Butzow R. Comparison of serous and mucinous ovarian carcinomas: distinct pattern of allelic loss at distal 8p and expression of transcription factor GATA-4. J Transl Med 2001; 81:517-26. [PMID: 11304571 DOI: 10.1038/labinvest.3780260] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
Using comparative genomic hybridization (CGH), we have previously demonstrated frequent loss of 8p, especially its distal part, in ovarian carcinoma. To compare the deletion map of distal 8p in serous and mucinous ovarian carcinomas, we performed allelic analysis with 18 polymorphic microsatellite markers at 8p21-p23. In serous carcinoma, loss of heterozygosity (LOH) was detected in 67% of the samples, and the majority of the carcinomas showed loss of all or most of the informative markers. In contrast, only 21% of mucinous carcinomas showed allelic loss, with only one or two loci showing LOH in each sample. In serous carcinomas, LOH was associated with higher grade tumors. Three distinct minimal common regions of loss could be defined in serous carcinomas (at 8p21.1, 8p22-p23.1, and 8p23.1). Expression of a transcription factor gene, GATA4, located at one of these regions (8p23.1) was studied in serous and mucinous ovarian carcinomas by Northern blotting and immunohistochemical staining of tumor microarray. Expression was found to be lost in most serous carcinomas but retained in the majority of mucinous carcinomas. Our results suggest distinct pathogenetic pathways in serous and mucinous ovarian carcinomas and the presence of more than one tumor suppressor gene at 8p involved in the tumorigenesis of serous carcinoma.
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MESH Headings
- Adenocarcinoma, Mucinous/genetics
- Adenocarcinoma, Mucinous/metabolism
- Adenocarcinoma, Mucinous/pathology
- Blotting, Northern
- Chromosomes, Human, Pair 8
- Cystadenocarcinoma, Serous/genetics
- Cystadenocarcinoma, Serous/metabolism
- Cystadenocarcinoma, Serous/pathology
- DNA-Binding Proteins/biosynthesis
- DNA-Binding Proteins/genetics
- DNA-Binding Proteins/immunology
- Female
- GATA4 Transcription Factor
- Gene Expression Regulation, Neoplastic
- Humans
- Immunohistochemistry
- Loss of Heterozygosity
- Ovarian Neoplasms/genetics
- Ovarian Neoplasms/metabolism
- Ovarian Neoplasms/pathology
- RNA, Messenger/biosynthesis
- Transcription Factors/biosynthesis
- Transcription Factors/genetics
- Transcription Factors/immunology
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Affiliation(s)
- H Lassus
- Department of Obstetrics and Gynecology, Helsinki University Central Hospital, Helsinki, Finland
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42
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Comparative genomic hybridization detects genetic imbalances in primary ovarian carcinomas as correlated with grade of differentiation. Cancer 2001. [DOI: 10.1002/1097-0142(20010201)91:3<534::aid-cncr1031>3.0.co;2-t] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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43
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Pimkhaokham A, Shimada Y, Fukuda Y, Kurihara N, Imoto I, Yang ZQ, Imamura M, Nakamura Y, Amagasa T, Inazawa J. Nonrandom chromosomal imbalances in esophageal squamous cell carcinoma cell lines: possible involvement of the ATF3 and CENPF genes in the 1q32 amplicon. Jpn J Cancer Res 2000; 91:1126-33. [PMID: 11092977 PMCID: PMC5926289 DOI: 10.1111/j.1349-7006.2000.tb00895.x] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Using comparative genomic hybridization (CGH), we investigated copy number aberrations in 29 esophageal squamous cell carcinoma (ESC) cell lines. All lines displayed numerous chromosome imbalances. The most frequent losses were observed on chromosome 18q (65.5%), Xp (48. 3%), 3p (44.8%), 4q (44.8%), 8p (41.4%), 11q23 - 25 (34.5%) and 4p (27.6%), whereas the most common copy number gains were noted at 8q (86.2%), 3q (82.8%), 5p (69%), 7p (69%), 20q (65.5%), 9q (55.2%), 11q (55.2%), 1q (48.3%), Xq (44.8%) and 18p (37.9%). High-level gains (HLGs) were detected at 3q26 (9 cases), 8q23 (6 cases), 5p14 - 15 (6 cases), 18p11.2 - 11.3 (6 cases), 3q27 - 28 (5 cases), 5p13 (3 cases), 7p14 - 15 (3 cases), 20q12 - 13 (3 cases), 11q13 (3 cases), 14q21 (2 cases), 20p11.2 (2 cases), 13q32 (2 case), and 1q32 (1 case). Among them, HLGs of 1q32 have been reported in other types of cancer, including glioblastoma and breast cancers. We successfully narrowed down the smallest common amplicon involving 1q-gain to the genomic segment between D1S414 and D1S2860 by fluorescence in situ hybridization (FISH). Southern and northern blot analysis clearly demonstrated that ATF3, human activating transcription factor-3 and CENPF, centromere protein F, mapped within this region, were significantly amplified and over-expressed in 1q32 amplicon.
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Affiliation(s)
- A Pimkhaokham
- Department of Molecular Cytogenetics, Medical Research Institute, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo 113-8519, Japan
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44
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Allen HJ, DiCioccio RA, Hohmann P, Piver MS, Tworek H. Microsatellite instability in ovarian and other pelvic carcinomas. CANCER GENETICS AND CYTOGENETICS 2000; 117:163-6. [PMID: 10704691 DOI: 10.1016/s0165-4608(99)00167-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Twenty-six cases of ovarian carcinoma and six cases of other pelvic neoplasms were analyzed for microsatellite instability (MSI) using frozen specimens, fluorescence technology, and four selected markers (D2S123 on chromosome 2, D18S58 on chromosome 18, BAT26 on chromosome 2, and BAT40 on chromosome 1). This procedure also allowed the detection of loss of heterogeneity (LOH) at the four selected loci. One of the cases of ovarian carcinoma exhibited MSI and this was evident at three loci. Of 44 informative loci, 7 exhibited LOH representing 3 cases of ovarian carcinoma, 3 of 4 cases of primary peritoneal carcinoma, and one case of unknown primary. These data support other findings that MSI is not a frequent occurrence in ovarian cancer; however, LOH is a more frequent event and may be a target for the development of diagnostic/prognostic procedures for ovarian and primary peritoneal carcinoma.
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Affiliation(s)
- H J Allen
- Department of Gynecologic Oncology, Roswell Park Cancer Institute, Buffalo, NY 14263, USA
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45
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Ahmed MN, Kim K, Haddad B, Berchuck A, Qumsiyeh MB. Comparative genomic hybridization studies in hydatidiform moles and choriocarcinoma: amplification of 7q21-q31 and loss of 8p12-p21 in choriocarcinoma. CANCER GENETICS AND CYTOGENETICS 2000; 116:10-5. [PMID: 10616525 DOI: 10.1016/s0165-4608(99)00103-x] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Comparative genomic hybridization (CGH) was utilized to investigate genetic changes from archived cases of choriocarcinoma (n = 12) and hydatidiform moles (n = 7). Test DNA was extracted from paraffin-embedded tissues, amplified using total universal PCR, and co-hybridized with control DNA to normal metaphases. Comparative genomic hybridization findings showed chromosomal imbalances in 9 of 12 cases of choriocarcinoma. By contrast, all hydatidiform moles showed normal CGH profiles. Consistent findings in choriocarcinoma included deletion at 8p (5 cases) and amplification at 7q (4 cases). A tumor suppressor gene (e.g., N33) at 8p and/or a growth regulator at 7q could play a role in the initiation of choriocarcinoma and its progression. This is the first study showing specific alterations in choriocarcinomas by CGH, and illustrates the utility of this technique in elucidating genetic changes in gynecological tumors.
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Affiliation(s)
- M N Ahmed
- Department of Pathology, Duke University Medical Center, Durham, NC 27710, USA
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46
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Kirschner LS, Taymans SE, Pack S, Pak E, Pike BL, Chandrasekharappa SC, Zhuang Z, Stratakis CA. Genomic mapping of chromosomal region 2p15-p21 (D2S378-D2S391): integration of Genemap'98 within a framework of yeast and bacterial artificial chromosomes. Genomics 1999; 62:21-33. [PMID: 10585764 DOI: 10.1006/geno.1999.5957] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The region of chromosome 2 encompassed by the polymorphic markers D2S378 (centromeric) and D2S391 (telomeric) spans an approximately 10-cM distance in cytogenetic bands 2p15-p21. This area is frequently involved in cytogenetic alterations in human cancers. It also harbors the genes for several genetic disorders, including Type I hereditary nonpolyposis colorectal cancer (HNPCC), familial male precocious puberty (FMPP), Carney complex (CNC), Doyne's honeycomb retinal dystrophy (DHRD), and one form of familial dyslexia (DYX-3). Only a handful of known genes have been mapped to 2p16. These include MSH2, which is responsible for HNPCC, FSHR, the gene responsible for FMPP, EFEMP-1, the gene mutated in DHRD, GTBP, a DNA repair gene, and SPTBN1, nonerythryocytic beta-spectrin. The genes for CNC and DYX-3 remain unknown, due to lack of a contig of this region and its underrepresentation in the existing maps. This report presents a yeast- and bacterial-artificial chromosome (YAC and BAC, respectively) resource for the construction of a sequence-ready map of 2p15-p21 between the markers D2S378 and D2S391 at the centromeric and telomeric ends, respectively. The recently published Genemap'98 lists 146 expressed sequence tags (ESTs) in this region; we have used our YAC-BAC map to place each of these ESTs within a framework of 40 known and 3 newly cloned polymorphic markers and 37 new sequence-tagged sites. This map provides an integration of genetic, radiation hybrid, and physical mapping information for the region corresponding to cytogenetic bands 2p15-p21 and is expected to facilitate the identification of disease genes from the area.
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MESH Headings
- Chromosome Mapping/methods
- Chromosome Walking
- Chromosomes, Artificial, Yeast
- Chromosomes, Bacterial
- Chromosomes, Human, Pair 2/genetics
- Colorectal Neoplasms, Hereditary Nonpolyposis/genetics
- DNA, Recombinant/genetics
- Dyslexia/genetics
- Expressed Sequence Tags
- Genetic Diseases, Inborn/genetics
- Genetic Markers
- Genital Diseases, Male/genetics
- Humans
- In Situ Hybridization, Fluorescence
- Male
- Neoplastic Syndromes, Hereditary/genetics
- Retinal Diseases/genetics
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Affiliation(s)
- L S Kirschner
- Developmental Endocrinology Branch, National Institutes of Health, Bethesda, Maryland 20892, USA.
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47
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Wu R, Connolly DC, Ren X, Fearon ER, Cho KR. Somatic mutations of the PPP2R1B candidate tumor suppressor gene at chromosome 11q23 are infrequent in ovarian carcinomas. Neoplasia 1999; 1:311-4. [PMID: 10935485 PMCID: PMC1508096 DOI: 10.1038/sj.neo.7900042] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Previous studies have demonstrated frequent allelic losses of distal chromosome 11q in ovarian carcinomas. The tumor suppressor gene(s) presumably targeted by these losses have not yet been identified. PPP2R1B is a candidate tumor suppressor gene at 11q23 that has recently been shown to be mutated in a subset of colorectal and lung cancers. We evaluated 5 ovarian carcinoma cell lines and 27 primary ovarian carcinomas for allelic losses of 11q23 and for mutations in the open reading frame of PPP2R1B. We also evaluated the primary tumors for allelic losses at 17p13, another chromosomal region frequently affected by losses of heterozygosity (LOH) in ovarian cancers. 11q23 and 17p13 allelic losses were identified in 25% and 74% of the carcinomas, respectively. No mutations within PPP2R1B coding sequences were found. These findings indicate that mutations of the PPP2R1B gene are infrequent in ovarian cancer and that deletions affecting the distal portion of chromosome 11q in ovarian cancer likely target inactivation of other genes.
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Affiliation(s)
- R Wu
- Department of Pathology, University of Michigan Medical School, Ann Arbor 48109, USA
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48
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Wolf NG, Abdul-Karim FW, Farver C, Schr�ck E, du Manoir S, Schwartz S. Analysis of ovarian borderline tumors using comparative genomic hybridization and fluorescence in situ hybridization. Genes Chromosomes Cancer 1999. [DOI: 10.1002/(sici)1098-2264(199908)25:4<307::aid-gcc1>3.0.co;2-1] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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49
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Rooney PH, Murray GI, Stevenson DA, Haites NE, Cassidy J, McLeod HL. Comparative genomic hybridization and chromosomal instability in solid tumours. Br J Cancer 1999; 80:862-73. [PMID: 10360667 PMCID: PMC2362298 DOI: 10.1038/sj.bjc.6690433] [Citation(s) in RCA: 100] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Affiliation(s)
- P H Rooney
- Department of Medicine and Therapeutics, University of Aberdeen, Foresterhill, UK
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50
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Taymans SE, Kirschner LS, Giatzakis C, Stratakis CA. Radiation hybrid mapping of chromosomal region 2p15-p16: integration of expressed and polymorphic sequences maps at the Carney complex (CNC) and Doyne honeycomb retinal dystrophy (DHRD) loci. Genomics 1999; 56:344-9. [PMID: 10087203 DOI: 10.1006/geno.1998.5720] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Chromosomal region 2p15-p16, which corresponds to the genetic interval flanked by polymorphic markers D2S119 and D2S378 and covers a genetic distance of approximately 16 cM, is underrepresented in the existing maps of chromosome 2. This is primarily due to two large gaps of unknown physical distance within the known yeast and bacterial artificial chromosome (YAC and BAC, respectively) maps. In constructing a YAC/BAC contig covering 2p15-p16, a total of 55 sequence-tagged sites (25 of which are polymorphic), including new sequences derived from chromosomal walking, and 38 expressed sequence tags were screened by a commercially available RH panel (Stanford G3). A total of 45 of these sequences were placed; 32 of them were assigned at unique sites. The high-resolution TNG3 RH panel was then used to define further the chromosomal order of markers contained in the region flanked by D2S391 and D2S2153. This region harbors the genes for two autosomal dominant disorders, Carney complex (CNC), a multiple neoplasia syndrome, and Doyne honeycomb retinal dystrophy (DHRD), a disease leading to blindness at a young age. This is the first attempt to order cloned sequences in chromosomal region 2p15-p16, an area apparently resistant to YAC cloning. Construction of the 2p15-p16 RH map is critical for identifying the genes responsible for CNC and DHRD, as well as for the molecular elucidation of a chromosomal region that is frequently rearranged in tumors.
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Affiliation(s)
- S E Taymans
- Section on Pediatric Endocrinology, National Institute of Child Health and Human Development, Bethesda, Maryland, 20892-1862, USA.
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