51
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Zhu X, Tian X, Yu C, Shen C, Yan T, Hong J, Wang Z, Fang JY, Chen H. A long non-coding RNA signature to improve prognosis prediction of gastric cancer. Mol Cancer 2016; 15:60. [PMID: 27647437 PMCID: PMC5029104 DOI: 10.1186/s12943-016-0544-0] [Citation(s) in RCA: 139] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Accepted: 09/07/2016] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Increasing evidence suggests long non-coding RNAs (lncRNAs) are frequently aberrantly expressed in cancers, however, few related lncRNA signatures have been established for prediction of cancer prognosis. We aimed at developing alncRNA signature to improve prognosis prediction of gastric cancer (GC). METHODS Using a lncRNA-mining approach, we performed lncRNA expression profiling in large GC cohorts from Gene Expression Ominus (GEO), including GSE62254 data set (N = 300) and GSE15459 data set (N = 192). We established a set of 24-lncRNAs that were significantly associated with the disease free survival (DFS) in the test series. RESULTS Based on this 24-lncRNA signature, the test series patients could be classified into high-risk or low-risk subgroup with significantly different DFS (HR = 1.19, 95 % CI = 1.13-1.25, P < 0.0001). The prognostic value of this 24-lncRNA signature was confirmed in the internal validation series and another external validation series, respectively. Further analysis revealed that the prognostic value of this signature was independent of lymph node ratio (LNR) and postoperative chemotherapy. Gene set enrichment analysis (GSEA) indicated that high risk score group was associated with several cancer recurrence and metastasis associated pathways. CONCLUSIONS The identification of the prognostic lncRNAs indicates the potential roles of lncRNAs in GC biogenesis. Our results may provide an efficient classification tool for clinical prognosis evaluation of GC.
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Affiliation(s)
- Xiaoqiang Zhu
- Division of Gastroenterology and Hepatology, Key Laboratory of Gastroenterology and Hepatology, Ministry of Health, State Key Laboratory for Oncogenes and Related Genes, Renji Hospital, School of Medicine, Shanghai JiaoTong University, Shanghai Institute of Digestive Disease, 145 Middle Shandong Road, Shanghai, 200001 China
| | - Xianglong Tian
- Division of Gastroenterology and Hepatology, Key Laboratory of Gastroenterology and Hepatology, Ministry of Health, State Key Laboratory for Oncogenes and Related Genes, Renji Hospital, School of Medicine, Shanghai JiaoTong University, Shanghai Institute of Digestive Disease, 145 Middle Shandong Road, Shanghai, 200001 China
| | - Chenyang Yu
- Division of Gastroenterology and Hepatology, Key Laboratory of Gastroenterology and Hepatology, Ministry of Health, State Key Laboratory for Oncogenes and Related Genes, Renji Hospital, School of Medicine, Shanghai JiaoTong University, Shanghai Institute of Digestive Disease, 145 Middle Shandong Road, Shanghai, 200001 China
| | - Chaoqin Shen
- Division of Gastroenterology and Hepatology, Key Laboratory of Gastroenterology and Hepatology, Ministry of Health, State Key Laboratory for Oncogenes and Related Genes, Renji Hospital, School of Medicine, Shanghai JiaoTong University, Shanghai Institute of Digestive Disease, 145 Middle Shandong Road, Shanghai, 200001 China
| | - Tingting Yan
- Division of Gastroenterology and Hepatology, Key Laboratory of Gastroenterology and Hepatology, Ministry of Health, State Key Laboratory for Oncogenes and Related Genes, Renji Hospital, School of Medicine, Shanghai JiaoTong University, Shanghai Institute of Digestive Disease, 145 Middle Shandong Road, Shanghai, 200001 China
| | - Jie Hong
- Division of Gastroenterology and Hepatology, Key Laboratory of Gastroenterology and Hepatology, Ministry of Health, State Key Laboratory for Oncogenes and Related Genes, Renji Hospital, School of Medicine, Shanghai JiaoTong University, Shanghai Institute of Digestive Disease, 145 Middle Shandong Road, Shanghai, 200001 China
| | - Zheng Wang
- Department of gastrointestinal surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127 China
| | - Jing-Yuan Fang
- Division of Gastroenterology and Hepatology, Key Laboratory of Gastroenterology and Hepatology, Ministry of Health, State Key Laboratory for Oncogenes and Related Genes, Renji Hospital, School of Medicine, Shanghai JiaoTong University, Shanghai Institute of Digestive Disease, 145 Middle Shandong Road, Shanghai, 200001 China
| | - Haoyan Chen
- Division of Gastroenterology and Hepatology, Key Laboratory of Gastroenterology and Hepatology, Ministry of Health, State Key Laboratory for Oncogenes and Related Genes, Renji Hospital, School of Medicine, Shanghai JiaoTong University, Shanghai Institute of Digestive Disease, 145 Middle Shandong Road, Shanghai, 200001 China
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Santarpia L, Bottai G, Kelly CM, Győrffy B, Székely B, Pusztai L. Deciphering and Targeting Oncogenic Mutations and Pathways in Breast Cancer. Oncologist 2016; 21:1063-78. [PMID: 27384237 PMCID: PMC5016060 DOI: 10.1634/theoncologist.2015-0369] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Accepted: 04/16/2016] [Indexed: 12/27/2022] Open
Abstract
UNLABELLED : Advances in DNA and RNA sequencing revealed substantially greater genomic complexity in breast cancer than simple models of a few driver mutations would suggest. Only very few, recurrent mutations or copy-number variations in cancer-causing genes have been identified. The two most common alterations in breast cancer are TP53 (affecting the majority of triple-negative breast cancers) and PIK3CA (affecting almost half of estrogen receptor-positive cancers) mutations, followed by a long tail of individually rare mutations affecting <1%-20% of cases. Each cancer harbors from a few dozen to a few hundred potentially high-functional impact somatic variants, along with a much larger number of potentially high-functional impact germline variants. It is likely that it is the combined effect of all genomic variations that drives the clinical behavior of a given cancer. Furthermore, entirely new classes of oncogenic events are being discovered in the noncoding areas of the genome and in noncoding RNA species driven by errors in RNA editing. In light of this complexity, it is not unexpected that, with the exception of HER2 amplification, no robust molecular predictors of benefit from targeted therapies have been identified. In this review, we summarize the current genomic portrait of breast cancer, focusing on genetic aberrations that are actively being targeted with investigational drugs. IMPLICATIONS FOR PRACTICE Next-generation sequencing is now widely available in the clinic, but interpretation of the results is challenging, and its impact on treatment selection is often limited. This work provides an overview of frequently encountered molecular abnormalities in breast cancer and discusses their potential therapeutic implications. This review emphasizes the importance of administering investigational targeted therapies, or off-label use of approved targeted drugs, in the context of a formal clinical trial or registry programs to facilitate learning about the clinical utility of tumor target profiling.
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Affiliation(s)
- Libero Santarpia
- Oncology Experimental Therapeutics, Istituto di Ricovero e Cura a Carattere Scientifico Humanitas Clinical and Research Institute, Milan, Italy
| | - Giulia Bottai
- Oncology Experimental Therapeutics, Istituto di Ricovero e Cura a Carattere Scientifico Humanitas Clinical and Research Institute, Milan, Italy
| | | | - Balázs Győrffy
- 2nd Department of Pediatrics, Semmelweis University, Budapest, Hungary
| | - Borbala Székely
- 2nd Department of Pathology, Semmelweis University, Budapest, Hungary
| | - Lajos Pusztai
- Yale Cancer Center, School of Medicine, Yale University, New Haven, Connecticut, USA
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53
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Bach AS, Derocq D, Laurent-Matha V, Montcourrier P, Sebti S, Orsetti B, Theillet C, Gongora C, Pattingre S, Ibing E, Roger P, Linares LK, Reinheckel T, Meurice G, Kaiser FJ, Gespach C, Liaudet-Coopman E. Nuclear cathepsin D enhances TRPS1 transcriptional repressor function to regulate cell cycle progression and transformation in human breast cancer cells. Oncotarget 2016; 6:28084-103. [PMID: 26183398 PMCID: PMC4695046 DOI: 10.18632/oncotarget.4394] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2015] [Accepted: 06/15/2015] [Indexed: 11/25/2022] Open
Abstract
The lysosomal protease cathepsin D (Cath-D) is overproduced in breast cancer cells (BCC) and supports tumor growth and metastasis formation. Here, we describe the mechanism whereby Cath-D is accumulated in the nucleus of ERα-positive (ER+) BCC. We identified TRPS1 (tricho-rhino-phalangeal-syndrome 1), a repressor of GATA-mediated transcription, and BAT3 (Scythe/BAG6), a nucleo-cytoplasmic shuttling chaperone protein, as new Cath-D-interacting nuclear proteins. Cath-D binds to BAT3 in ER+ BCC and they partially co-localize at the surface of lysosomes and in the nucleus. BAT3 silencing inhibits Cath-D accumulation in the nucleus, indicating that Cath-D nuclear targeting is controlled by BAT3. Fully mature Cath-D also binds to full-length TRPS1 and they co-localize in the nucleus of ER+ BCC where they are associated with chromatin. Using the LexA-VP16 fusion co-activator reporter assay, we then show that Cath-D acts as a transcriptional repressor, independently of its catalytic activity. Moreover, microarray analysis of BCC in which Cath-D and/or TRPS1 expression were silenced indicated that Cath-D enhances TRPS1-mediated repression of several TRPS1-regulated genes implicated in carcinogenesis, including PTHrP, a canonical TRPS1 gene target. In addition, co-silencing of TRPS1 and Cath-D in BCC affects the transcription of cell cycle, proliferation and transformation genes, and impairs cell cycle progression and soft agar colony formation. These findings indicate that Cath-D acts as a nuclear transcriptional cofactor of TRPS1 to regulate ER+ BCC proliferation and transformation in a non-proteolytic manner.
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Affiliation(s)
- Anne-Sophie Bach
- IRCM, Institut de Recherche en Cancérologie de Montpellier, Montpellier, France.,INSERM U1194, Montpellier, France.,Université de Montpellier, Montpellier, France.,Institut Régional du Cancer de Montpellier, Montpellier, France
| | - Danielle Derocq
- IRCM, Institut de Recherche en Cancérologie de Montpellier, Montpellier, France.,INSERM U1194, Montpellier, France.,Université de Montpellier, Montpellier, France.,Institut Régional du Cancer de Montpellier, Montpellier, France
| | - Valérie Laurent-Matha
- IRCM, Institut de Recherche en Cancérologie de Montpellier, Montpellier, France.,INSERM U1194, Montpellier, France.,Université de Montpellier, Montpellier, France.,Institut Régional du Cancer de Montpellier, Montpellier, France
| | - Philippe Montcourrier
- IRCM, Institut de Recherche en Cancérologie de Montpellier, Montpellier, France.,INSERM U1194, Montpellier, France.,Université de Montpellier, Montpellier, France.,Institut Régional du Cancer de Montpellier, Montpellier, France
| | - Salwa Sebti
- IRCM, Institut de Recherche en Cancérologie de Montpellier, Montpellier, France.,INSERM U1194, Montpellier, France.,Université de Montpellier, Montpellier, France.,Institut Régional du Cancer de Montpellier, Montpellier, France
| | - Béatrice Orsetti
- IRCM, Institut de Recherche en Cancérologie de Montpellier, Montpellier, France.,INSERM U1194, Montpellier, France.,Université de Montpellier, Montpellier, France.,Institut Régional du Cancer de Montpellier, Montpellier, France
| | - Charles Theillet
- IRCM, Institut de Recherche en Cancérologie de Montpellier, Montpellier, France.,INSERM U1194, Montpellier, France.,Université de Montpellier, Montpellier, France.,Institut Régional du Cancer de Montpellier, Montpellier, France
| | - Céline Gongora
- IRCM, Institut de Recherche en Cancérologie de Montpellier, Montpellier, France.,INSERM U1194, Montpellier, France.,Université de Montpellier, Montpellier, France.,Institut Régional du Cancer de Montpellier, Montpellier, France
| | - Sophie Pattingre
- IRCM, Institut de Recherche en Cancérologie de Montpellier, Montpellier, France.,INSERM U1194, Montpellier, France.,Université de Montpellier, Montpellier, France.,Institut Régional du Cancer de Montpellier, Montpellier, France
| | - Eva Ibing
- Universität zu Lübeck, Lübeck, Germany
| | - Pascal Roger
- Department of Pathology, CHU Nimes, Nimes, France
| | - Laetitia K Linares
- IRCM, Institut de Recherche en Cancérologie de Montpellier, Montpellier, France.,INSERM U1194, Montpellier, France.,Université de Montpellier, Montpellier, France.,Institut Régional du Cancer de Montpellier, Montpellier, France
| | - Thomas Reinheckel
- Institute of Molecular Medicine and Cell Research, Albert-Ludwigs-University, Freiburg, Germany
| | - Guillaume Meurice
- Functional Genomic Plateform, Institut Gustave Roussy, Villejuif, France
| | | | - Christian Gespach
- INSERM U938, Molecular and Clinical Oncology, Paris 6 University Pierre et Marie Curie, Hôpital Saint-Antoine, Paris, France
| | - Emmanuelle Liaudet-Coopman
- IRCM, Institut de Recherche en Cancérologie de Montpellier, Montpellier, France.,INSERM U1194, Montpellier, France.,Université de Montpellier, Montpellier, France.,Institut Régional du Cancer de Montpellier, Montpellier, France
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Ferrari A, Vincent-Salomon A, Pivot X, Sertier AS, Thomas E, Tonon L, Boyault S, Mulugeta E, Treilleux I, MacGrogan G, Arnould L, Kielbassa J, Le Texier V, Blanché H, Deleuze JF, Jacquemier J, Mathieu MC, Penault-Llorca F, Bibeau F, Mariani O, Mannina C, Pierga JY, Trédan O, Bachelot T, Bonnefoi H, Romieu G, Fumoleau P, Delaloge S, Rios M, Ferrero JM, Tarpin C, Bouteille C, Calvo F, Gut IG, Gut M, Martin S, Nik-Zainal S, Stratton MR, Pauporté I, Saintigny P, Birnbaum D, Viari A, Thomas G. A whole-genome sequence and transcriptome perspective on HER2-positive breast cancers. Nat Commun 2016; 7:12222. [PMID: 27406316 PMCID: PMC4947184 DOI: 10.1038/ncomms12222] [Citation(s) in RCA: 103] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2015] [Accepted: 06/12/2016] [Indexed: 02/06/2023] Open
Abstract
HER2-positive breast cancer has long proven to be a clinically distinct class of breast cancers for which several targeted therapies are now available. However, resistance to the treatment associated with specific gene expressions or mutations has been observed, revealing the underlying diversity of these cancers. Therefore, understanding the full extent of the HER2-positive disease heterogeneity still remains challenging. Here we carry out an in-depth genomic characterization of 64 HER2-positive breast tumour genomes that exhibit four subgroups, based on the expression data, with distinctive genomic features in terms of somatic mutations, copy-number changes or structural variations. The results suggest that, despite being clinically defined by a specific gene amplification, HER2-positive tumours melt into the whole luminal-basal breast cancer spectrum rather than standing apart. The results also lead to a refined ERBB2 amplicon of 106 kb and show that several cases of amplifications are compatible with a breakage-fusion-bridge mechanism.
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Affiliation(s)
- Anthony Ferrari
- Synergie Lyon Cancer, Plateforme de bioinformatique ‘Gilles Thomas' Centre Léon Bérard, 28 rue Laënnec, 69008 Lyon, France
| | - Anne Vincent-Salomon
- Institut Curie, PSL Research University, Département de Pathologie, INSERM U934, 26 rue d'Ulm, 75248 Paris, France
| | - Xavier Pivot
- Centre Hospitalier Universitaire de Minjoz, UMR INSERM 1098, Boulevard A. Fleming, Besançon 25000, France
| | - Anne-Sophie Sertier
- Synergie Lyon Cancer, Plateforme de bioinformatique ‘Gilles Thomas' Centre Léon Bérard, 28 rue Laënnec, 69008 Lyon, France
| | - Emilie Thomas
- Synergie Lyon Cancer, Plateforme de bioinformatique ‘Gilles Thomas' Centre Léon Bérard, 28 rue Laënnec, 69008 Lyon, France
| | - Laurie Tonon
- Synergie Lyon Cancer, Plateforme de bioinformatique ‘Gilles Thomas' Centre Léon Bérard, 28 rue Laënnec, 69008 Lyon, France
| | - Sandrine Boyault
- Plateforme de génomique des cancers, Centre Léon Bérard, 28 rue Laënnec, 69008 Lyon, France
| | - Eskeatnaf Mulugeta
- Institut Curie, UMR 3215 CNRS, Génétique et biologie du développement, Epigénèse et développement des mammifères, U934 Inserm, 26 rue d'Ulm, 75248 Paris, France
| | - Isabelle Treilleux
- Centre Léon Bérard, Département de Pathologie, 28 rue Laënnec, 69008 Lyon, France
| | - Gaëtan MacGrogan
- Département de Biopathologie, Unité Inserm U916, Institut Bergonié, 229 cours de l'Argonne, 33076 Bordeaux, France
| | - Laurent Arnould
- Centre Georges-François Leclerc et CRB Ferdinand Cabanne, 1 rue du Professeur Marion, Inserm U866-UBFC, 21000 Dijon, France
| | - Janice Kielbassa
- Synergie Lyon Cancer, Plateforme de bioinformatique ‘Gilles Thomas' Centre Léon Bérard, 28 rue Laënnec, 69008 Lyon, France
| | - Vincent Le Texier
- Synergie Lyon Cancer, Plateforme de bioinformatique ‘Gilles Thomas' Centre Léon Bérard, 28 rue Laënnec, 69008 Lyon, France
| | - Hélène Blanché
- Centre d'Etude du Polymorphisme Humain (CEPH), Fondation Jean Dausset, 27 rue Juliette Dodu, 75010 Paris, France
| | - Jean-François Deleuze
- Centre d'Etude du Polymorphisme Humain (CEPH), Fondation Jean Dausset, 27 rue Juliette Dodu, 75010 Paris, France
| | - Jocelyne Jacquemier
- Institut Paoli-Calmettes, Département de Pathologie, 232 Boulevard de Sainte-Marguerite, 13009 Marseille, France
| | - Marie-Christine Mathieu
- Institut Gustave Roussy, Comité de Pathologie Mammaire, 114 rue Edouard Vaillant, 94805 Villejuif, France
| | - Frédérique Penault-Llorca
- Centre Jean Perrin, Département de Biopathologie, EA 4677 ERTICa, Université d'Auvergne, 58 rue Montalembert, 63000 Clermont-Ferrand, France
| | - Frédéric Bibeau
- Institut Régional du Cancer de Montpellier (ICM), Département de Pathologie, 208 Avenue des Apothicaires, 34298 Montpellier, France
| | - Odette Mariani
- Institut Curie, PSL Research University, Service de Pathologie, Centre de Ressources Biologiques, BRIF BB-0033-00048, 26 rue d'Ulm, 75248 Paris, France
| | - Cécile Mannina
- Département de Pathologie, Institut Bergonié, 229 cours de l'Argonne, CS 61283, 33076 Bordeaux, France
| | - Jean-Yves Pierga
- Institut Curie, PSL Research University, Département d'Oncologie Médicale, Université Paris Descartes, 26 rue d'Ulm, 75248 Paris, France
| | - Olivier Trédan
- Centre Léon Bérard, Département de Cancérologie Médicale, 28 rue Laënnec, 69008 Lyon, France
| | - Thomas Bachelot
- Centre Léon Bérard, Département de Cancérologie Médicale, 28 rue Laënnec, 69008 Lyon, France
| | - Hervé Bonnefoi
- Department of Medical Oncology, Institut Bergonié Unicancer, University of Bordeaux, INSERM U916, CIC1401, 229 cours de l'Argonne, CS 61283, 33076 Bordeaux, France
| | - Gilles Romieu
- Institut Régional du Cancer de Montpellier (ICM), Oncologie Sénologie, 208 Avenue des Apothicaires, 34298 Montpellier, France
| | - Pierre Fumoleau
- Centre Georges-François Leclerc et CRB Ferdinand Cabanne, 1 rue du Professeur Marion, Inserm U866-UBFC, 21000 Dijon, France
| | - Suzette Delaloge
- Institut Gustave Roussy, Comité de Pathologie Mammaire, 114 rue Edouard Vaillant, 94805 Villejuif, France
| | - Maria Rios
- Centre Alexis Vautrin, Département d'Oncologie Médicale, 6 Avenue de Bourgogne, 54511 Vandoeuvre Les Nancy, France
| | - Jean-Marc Ferrero
- Centre Antoine Lacassagne, Département d'Oncologie Médicale, 33 Avenue de Valombrose, 06189 Nice, France
| | - Carole Tarpin
- Institut Paoli-Calmettes, Département d'Oncologie Médicale, 232 Boulevard de Sainte-Marguerite, 13009 Marseille, France
| | - Catherine Bouteille
- Clinique Mutualiste de Bellevue, Chirurgie Gynécologique et Mammaire, 3 rue le Verrier, 42100 Saint-Etienne, France
| | - Fabien Calvo
- Institut Gustave Roussy, Cancer Core Europe, 39 rue Camille Desmoulins, Villejuif 94805, France
| | - Ivo Glynne Gut
- CNAG-CRG, Centre for Genomic Regulation (CRG), C/Baldiri Reixac 4, 08028 Barcelona, Spain
- Universitat Pompeu Fabra, Plaça de la Mercè, 10, 08002 Barcelona, Spain
| | - Marta Gut
- CNAG-CRG, Centre for Genomic Regulation (CRG), C/Baldiri Reixac 4, 08028 Barcelona, Spain
- Universitat Pompeu Fabra, Plaça de la Mercè, 10, 08002 Barcelona, Spain
| | - Sancha Martin
- Wellcome Trust Sanger Institute, Hinxton, Cambridge CB10 1SA, UK
| | - Serena Nik-Zainal
- Wellcome Trust Sanger Institute, Hinxton, Cambridge CB10 1SA, UK
- East Anglian Medical Genetics Service, Cambridge University Hospitals NHS Foundation Trust, Cambridge CB2 9NB, UK
| | | | - Iris Pauporté
- Institut National du Cancer, Département de Recherche Clinique, 52 Avenue Morizet, 92513 Boulogne-Billancourt, France
| | - Pierre Saintigny
- INSERM U1052-CNRS 5286, Cancer Research Center of Lyon, F-69008 Lyon, France
- Université de Lyon, F-69622 Lyon, France
- Centre Léon Bérard, 28 rue Laënnec, 69008 Lyon, France
| | - Daniel Birnbaum
- Département d'Oncologie Moléculaire, Institut Paoli-Calmettes, Centre de Recherche en Cancérologie de Marseille, INSERM, CNRS, Aix-Marseille Université, 232 boulevard de Sainte-Marguerite, 13009 Marseille, France
| | - Alain Viari
- Synergie Lyon Cancer, Plateforme de bioinformatique ‘Gilles Thomas' Centre Léon Bérard, 28 rue Laënnec, 69008 Lyon, France
- Equipe Erable, INRIA Grenoble-Rhône-Alpes, 655 Avenue de l'Europe, 38330 Montbonnot-Saint Martin, France
| | - Gilles Thomas
- Synergie Lyon Cancer, Plateforme de bioinformatique ‘Gilles Thomas' Centre Léon Bérard, 28 rue Laënnec, 69008 Lyon, France
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Xu HX, Wu KJ, Tian YJ, Liu Q, Han N, He XL, Yuan X, Wu GS, Wu KM. Expression profile of SIX family members correlates with clinic-pathological features and prognosis of breast cancer: A systematic review and meta-analysis. Medicine (Baltimore) 2016; 95:e4085. [PMID: 27399099 PMCID: PMC5058828 DOI: 10.1097/md.0000000000004085] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2016] [Revised: 05/30/2016] [Accepted: 06/06/2016] [Indexed: 12/21/2022] Open
Abstract
Sineoculis homeobox homolog (SIX) family proteins, including SIX1, SIX2, SIX3, SIX4, SIX5, and SIX6, have been implicated in the initiation and progression of breast cancer, but the role of each member in breast tumor is not fully understood. We conducted a systematic review and meta-analysis to evaluate the association between the mRNA levels of all 6 members and clinic-pathological characteristics and clinical outcome of breast cancer patients based on the PRISMA statement criteria.ArrayExpress and Oncomine were searched for eligible databases published up to December 10, 2015. The association between the mRNA expression of SIX family members and clinic-pathological features and prognosis was measured by the odds ratio (OR), hazard ratio (HR), and the corresponding 95% confidence interval (CI), respectively. All statistical analyses were performed using STATA software.In total, 20 published Gene Expression Omnibus (GEO) databases with 3555 patients were analyzed. Our analysis revealed that patients with SIX1 overexpression had worse overall survival (OS) (HR: 1.28, 95% CI: 1.03-1.58) and shorter relapse-free survival (RFS) (HR: 1.28, 95% CI: 1.05-1.56), and much worse prognosis for luminal breast cancer patients with SIX1 overexpression (OS: HR: 1.64, 95% CI: 1.13-2.39; RFS: HR: 1.43, 95% CI: 1.06-1.93). We found that patients with higher SIX2 level had shorter time to both relapse and metastasis. However, high SIX3 mRNA level was a protective factor for OS and RFS of basal-like breast cancer patients.Our study suggested that members of SIX family played distinct roles in breast cancer. Detailed analysis of the expression of the SIX family members might provide useful information to predict breast cancer progression and prognosis.
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Affiliation(s)
- Han-Xiao Xu
- Department of Oncology, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei
| | - Kong-Ju Wu
- Nursing School of Pingdingshan University, Pingdingshan, Henan
| | - Yi-Jun Tian
- Department of Oncology, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei
| | - Qian Liu
- Department of Oncology, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei
| | - Na Han
- Department of Oncology, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei
| | - Xue-Lian He
- Clinical Research Center, Wuhan Medical and Healthcare Center for Women and Children, Wuhan, Hubei, People's Republic of China
| | - Xun Yuan
- Department of Oncology, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei
- Departments of Oncology and Pathology, Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit, MI
| | - Gen Sheng Wu
- Departments of Oncology and Pathology, Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit, MI
| | - Kong-Ming Wu
- Department of Oncology, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei
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56
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Vaidyanathan S, Thangavelu PU, Duijf PHG. Overexpression of Ran GTPase Components Regulating Nuclear Export, but not Mitotic Spindle Assembly, Marks Chromosome Instability and Poor Prognosis in Breast Cancer. Target Oncol 2016; 11:677-686. [DOI: 10.1007/s11523-016-0432-y] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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57
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Cyclin E amplification, over-expression, and relapse-free survival in HER-2-positive primary breast cancer. Tumour Biol 2016; 37:9813-23. [PMID: 26810187 DOI: 10.1007/s13277-016-4870-z] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Accepted: 01/14/2016] [Indexed: 12/25/2022] Open
Abstract
Cyclin E is a well-characterized cell cycle regulator and an amplified oncogene in breast cancer. Over-expression of cyclin E has generally been associated with poor survival. Recent studies have shown an interaction between HER-2 (ERBB2) and cyclin E, but the exact mechanism is unknown. Interestingly, cyclin E over-expression has been associated with trastuzumab resistance. We studied cyclin E over-expression, CCNE1 amplification, and relapse-free survival in HER-2-positive primary breast cancers treated with and without trastuzumab therapy. Formalin-fixed paraffin-embedded tissue samples from 202 HER-2-positive breast carcinomas were studied. Expression levels of cyclin E and proliferation marker Ki-67 were determined using immunohistochemistry. Chromogenic in situ hybridization (CISH) with a gene-specific bacterial artificial chromosome (BAC) probe was used to analyze presence of CCNE1 amplification. Majority of HER-2-positive breast carcinomas exhibited nuclear staining for cyclin E protein. Cyclin E was highly expressed (≥50 % cells) in 37 % of cases. Incidence of CCNE1 amplification (≥6 gene copies/cell or clusters) was 8 %. Cyclin E amplification and over-expression were strongly associated with each other, grade, hormone receptors, and Ki-67. Neither high cyclin E expression nor CCNE1 amplification was associated with relapse-free survival (RFS) irrespective of short-term (9-week regimen) adjuvant trastuzumab therapy. These results confirm cyclin E and HER-2 gene co-amplification in a fraction of HER-2-positive breast cancers. Cyclin E is frequently over-expressed but appears to have limited value as a prognostic or predictive factor in HER-2-positive breast cancer regardless of trastuzumab therapy.
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Xu H, Tian Y, Yuan X, Liu Y, Wu H, Liu Q, Wu GS, Wu K. Enrichment of CD44 in basal-type breast cancer correlates with EMT, cancer stem cell gene profile, and prognosis. Onco Targets Ther 2016; 9:431-44. [PMID: 26855592 PMCID: PMC4727509 DOI: 10.2147/ott.s97192] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Cluster of differentiation 44 (CD44) is a transmembrane glycoprotein that serves as the receptor for the extracellular matrix component hyaluronic acid. CD44 has been reported to play key roles in cell proliferation, motility, and survival, but its role in breast cancer remains controversial. In this study, we conducted a meta-analysis. A total of 23 published Gene Expression Omnibus databases were included to evaluate the association between CD44 mRNA expression and clinicopathological characteristics or prognosis of the patients with breast cancer. Our analysis revealed that CD44 expression was associated with clinicopathological features, including the histological grade, estrogen receptor status, progesterone receptor status, and human epidermal growth factor receptor-2 status. Higher levels of CD44 expression were observed in the basal subtype of breast cancer both at the mRNA and protein levels (odds ratio [OR] =2.08, 95% confidence interval [CI]: 1.72–2.52; OR =2.11, 95% CI: 1.67–2.68). Patients with CD44 overexpression exhibited significantly worse overall survival (hazard ratio =1.27; 95% CI: 1.04–1.55). Whole gene profile analysis revealed that CD44 expression was enriched in basal-type breast cancer and correlated with epithelial–mesenchymal transition and cancer stem cell gene profiles. In summary, our analyses indicated that CD44 potentially might be a prognostic marker for breast cancer and thus can serve as a therapeutic target for basal-type breast cancer.
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Affiliation(s)
- Hanxiao Xu
- Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Yijun Tian
- Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Xun Yuan
- Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Yu Liu
- Department of Geriatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Hua Wu
- Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Qian Liu
- Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Gen Sheng Wu
- Department of Oncology, Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit, MI, USA; Department of Pathology, Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit, MI, USA
| | - Kongming Wu
- Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
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Cdk12 is essential for embryonic development and the maintenance of genomic stability. Cell Death Differ 2015; 23:1038-48. [PMID: 26658019 PMCID: PMC4987723 DOI: 10.1038/cdd.2015.157] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2015] [Revised: 10/28/2015] [Accepted: 10/30/2015] [Indexed: 01/06/2023] Open
Abstract
The maintenance of genomic integrity during early embryonic development is important in order to ensure the proper development of the embryo. Studies from cultured cells have demonstrated that cyclin-dependent kinase 12 (Cdk12) is a multifunctional protein that maintains genomic stability and the pluripotency of embryonic stem cells. Perturbation of its functions is also known to be associated with pathogenesis and drug resistance in human cancers. However, the biological significance of Cdk12 in vivo is unclear. Here we bred mice that are deficient in Cdk12 and demonstrated that Cdk12 depletion leads to embryonic lethality shortly after implantation. We also used an in vitro culture system of blastocysts to examine the molecular mechanisms associated with the embryonic lethality of Cdk12-deficient embryos. Cdk12−/− blastocysts fail to undergo outgrowth of the inner cell mass because of an increase in the apoptosis of these cells. Spontaneous DNA damage was revealed by an increase in 53BP1 foci among cells cultured from Cdk12−/− embryos. Furthermore, the expression levels of various DNA damage response genes, namely Atr, Brca1, Fanci and Fancd2, are reduced in Cdk12−/− embryos. These findings indicate that Cdk12 is important for the correct expression of some DNA damage response genes and indirectly has an influence on the efficiency of DNA repair. Our report also highlights that DNA breaks occurring during DNA replication are frequent in mouse embryonic cells and repair of such damage is critical to the successful development of mouse embryos.
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Jézéquel P, Sharif Z, Lasla H, Gouraud W, Guérin-Charbonnel C, Campion L, Chrétien S, Campone M. Gene-expression signature functional annotation of breast cancer tumours in function of age. BMC Med Genomics 2015; 8:80. [PMID: 26597277 PMCID: PMC4657228 DOI: 10.1186/s12920-015-0153-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Accepted: 11/17/2015] [Indexed: 02/04/2023] Open
Abstract
BACKGROUND Breast cancer biological characteristics change as age advances. Today, there is a lack of knowledge regarding age-specific molecular alterations that characterize breast tumours, notably in elderly patients. The vast majority of studies that aimed at exploring breast cancer in function of age are based on clinico-pathological data. Gene-expression signatures (GES), which in some ways capture biological information in a non-reductionist manner, represent powerful tools able to explore tumour heterogeneity. METHODS Twenty-five GES were used for functional annotation of breast tumours in function of age: five for molecular subtyping, seven for immune response, three for metabolism, seven for critical pathways in cancer and three for prognosis. Affymetrix® genomics datasets were exclusively used to avoid cross-platform normalization issues. Available corresponding clinico-pathological data were also retrieved and analysed. RESULTS Fifteen publicly available datasets were pooled for a total of 2378 breast cancer patients (whole cohort), out of whom 1413 were of Caucasian origin. Three age groups were defined: ≤ 40 years (AG1), > 40 to < 70 years (AG2) and ≥ 70 years (AG3). We confirmed that age influenced the incidence of molecular subtypes. We found a significant growing incidence of luminal B and a decreasing kinetics for basal-like in function of age. We showed that AG3 luminal B tumours were less aggressive than AG1 luminal B tumours based on different GES (iron metabolism, mitochondrial oxidative phosphorylation and reactive stroma), recurrence score prognostic GES and histological grade (SBR). Contrary to tumours of young patients, tumours of elderly patients concentrated favourable GES scores: high oestrogen receptor and mitochondrial oxidative phosphorylation, low proliferation, basal-like, glycolysis, chromosomal instability and iron metabolism, and low GES prognostic scores (van't Veer 70-GES, genomic grade index and recurrence score). CONCLUSIONS Functional annotation of breast tumours by means of 25 GES demonstrated a decreasing aggressiveness of breast tumours in function of age. This strategy, which can be strengthened by increasing the number of representative GES to gain more insight into biological systems involved in this disease, provides a framework to develop rational therapeutic strategies in function of age.
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Affiliation(s)
- Pascal Jézéquel
- Bioinfomics unit, Integrated Centre for Oncology - René Gauducheau, Bd J. Monod, Nantes, Saint Herblain Cedex, 44805, France. .,Cancer Genomic Unit, Integrated Centre for Oncology - René Gauducheau, Bd J. Monod, Nantes, Saint Herblain Cedex, 44805, France. .,INSERM U892, IRT-UN, 8 quai Moncousu, Nantes Cedex, 44007, France. .,Biopatholgy department, Integrated Centre for Oncology - René Gauducheau, Bd J. Monod, Nantes, Saint Herblain Cedex, 44805, France.
| | - Zein Sharif
- Départemental de Vendée - site de Montaigu, Polyvalent medicine service, Centre Hospitalier, 54, rue Saint Jacques, BP 259, Montaigu, 85602, France.
| | - Hamza Lasla
- Bioinfomics unit, Integrated Centre for Oncology - René Gauducheau, Bd J. Monod, Nantes, Saint Herblain Cedex, 44805, France.
| | - Wilfried Gouraud
- Bioinfomics unit, Integrated Centre for Oncology - René Gauducheau, Bd J. Monod, Nantes, Saint Herblain Cedex, 44805, France. .,Cancer Genomic Unit, Integrated Centre for Oncology - René Gauducheau, Bd J. Monod, Nantes, Saint Herblain Cedex, 44805, France. .,INSERM U892, IRT-UN, 8 quai Moncousu, Nantes Cedex, 44007, France.
| | - Catherine Guérin-Charbonnel
- Bioinfomics unit, Integrated Centre for Oncology - René Gauducheau, Bd J. Monod, Nantes, Saint Herblain Cedex, 44805, France. .,Cancer Genomic Unit, Integrated Centre for Oncology - René Gauducheau, Bd J. Monod, Nantes, Saint Herblain Cedex, 44805, France. .,INSERM U892, IRT-UN, 8 quai Moncousu, Nantes Cedex, 44007, France.
| | - Loïc Campion
- INSERM U892, IRT-UN, 8 quai Moncousu, Nantes Cedex, 44007, France. .,Biostatistics unit, Integrated Centre for Oncology - René Gauducheau, Bd J. Monod, Nantes, Saint Herblain Cedex, 44805, France.
| | - Stéphane Chrétien
- Mathematics laboratory, UMR CNRS 6623 et Université de Franche Comté, 16 route de Gray, Besançon Cedex, 25030, France.
| | - Mario Campone
- Bioinfomics unit, Integrated Centre for Oncology - René Gauducheau, Bd J. Monod, Nantes, Saint Herblain Cedex, 44805, France. .,INSERM U892, IRT-UN, 8 quai Moncousu, Nantes Cedex, 44007, France. .,Medical oncology service, Integrated Centre for Oncology - René Gauducheau, Bd J. Monod, Nantes, Saint Herblain Cedex, 44805, France.
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Investigating inter-chromosomal regulatory relationships through a comprehensive meta-analysis of matched copy number and transcriptomics data sets. BMC Genomics 2015; 16:967. [PMID: 26581858 PMCID: PMC4650296 DOI: 10.1186/s12864-015-2100-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2015] [Accepted: 10/15/2015] [Indexed: 12/16/2022] Open
Abstract
Background Gene regulatory relationships can be inferred using matched array comparative genomics and transcriptomics data sets from cancer samples. The way in which copy numbers of genes in cancer samples are often greatly disrupted works like a natural gene amplification/deletion experiment. There are now a large number of such data sets publicly available making a meta-analysis of the data possible. Results We infer inter-chromosomal acting gene regulatory relationships from a meta-analysis of 31 publicly available matched array comparative genomics and transcriptomics data sets in humans. We obtained statistically significant predictions of target genes for 1430 potential regulatory genes. The regulatory relationships being inferred are either direct relationships, of a transcription factor on its target, or indirect ones, through pathways containing intermediate steps. We analyse the predictions in terms of cocitations, both publications which cite a regulator with any of its inferred targets and cocitations of any genes in a target list. Conclusions The most striking observation from the results is the greater number of inter-chromosomal regulatory relationships involving repression compared to those involving activation. The complete results of the meta-analysis are presented in the database METAMATCHED. We anticipate that the predictions contained in the database will be useful in informing experiments and in helping to construct networks of regulatory relationships. Electronic supplementary material The online version of this article (doi:10.1186/s12864-015-2100-5) contains supplementary material, which is available to authorized users.
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Yan JF, Kim H, Jeong SK, Lee HJ, Sethi MK, Lee LY, Beavis RC, Im H, Snyder MP, Hofree M, Ideker T, Wu SL, Paik YK, Fanayan S, Hancock WS. Integrated Proteomic and Genomic Analysis of Gastric Cancer Patient Tissues. J Proteome Res 2015; 14:4995-5006. [PMID: 26435392 DOI: 10.1021/acs.jproteome.5b00827] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
V-erb-b2 erythroblastic leukemia viral oncogene homologue 2, known as ERBB2, is an important oncogene in the development of certain cancers. It can form a heterodimer with other epidermal growth factor receptor family members and activate kinase-mediated downstream signaling pathways. ERBB2 gene is located on chromosome 17 and is amplified in a subset of cancers, such as breast, gastric, and colon cancer. Of particular interest to the Chromosome-Centric Human Proteome Project (C-HPP) initiative is the amplification mechanism that typically results in overexpression of a set of genes adjacent to ERBB2, which provides evidence of a linkage between gene location and expression. In this report we studied patient samples from ERBB2-positive together with adjacent control nontumor tissues. In addition, non-ERBB2-expressing patient samples were selected as comparison to study the effect of expression of this oncogene. We detected 196 proteins in ERBB2-positive patient tumor samples that had minimal overlap (29 proteins) with the non-ERBB2 tumor samples. Interaction and pathway analysis identified extracellular signal regulated kinase (ERK) cascade and actin polymerization and actinmyosin assembly contraction as pathways of importance in ERBB2+ and ERBB2- gastric cancer samples, respectively. The raw data files are deposited at ProteomeXchange (identifier: PXD002674) as well as GPMDB.
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Affiliation(s)
- Julia Fangfei Yan
- Barnett Institute and Department of Chemistry and Chemical Biology, Northeastern University , 360 Huntington Avenue, Boston, Massachusetts 02115, United States
| | - Hoguen Kim
- Yonsei University College of Medicine, Yonsei University , 50-1 Yonsei-Ro, Seodaemun-gu, Seoul 120-752, Korea
| | - Seul-Ki Jeong
- Yonsei Proteome Research Center, Yonsei University , 262 Seongsanno, Seodaemun-gu, Seoul 120-749, Korea
| | - Hyoung-Joo Lee
- Yonsei Proteome Research Center, Yonsei University , 262 Seongsanno, Seodaemun-gu, Seoul 120-749, Korea
| | - Manveen K Sethi
- Department of Chemistry and Biomolecular Sciences, Macquarie University , Sydney, New South Wales 2109, Australia
| | - Ling Y Lee
- Department of Chemistry and Biomolecular Sciences, Macquarie University , Sydney, New South Wales 2109, Australia
| | - Ronald C Beavis
- Department of Biochemistry and Medical Genetics, Faculty of Health Sciences, University of Manitoba , 745 Bannatyne Avenue, Winnipeg, Manitoba R3E 0J9, Canada
| | - Hogune Im
- Department of Genetics, Stanford University , Stanford, California 94305, United States
| | - Michael P Snyder
- Department of Genetics, Stanford University , Stanford, California 94305, United States
| | - Matan Hofree
- Department of Computer Science and Engineering, University of California, San Diego , 9500 Gilman Drive, La Jolla, California 92093, United States
| | - Trey Ideker
- Program in Bioinformatics, University of California, San Diego , 9500 Gilman Drive, La Jolla, California 92093, United States
| | - Shiaw-Lin Wu
- Barnett Institute and Department of Chemistry and Chemical Biology, Northeastern University , 360 Huntington Avenue, Boston, Massachusetts 02115, United States
| | - Young-Ki Paik
- Yonsei University College of Medicine, Yonsei University , 50-1 Yonsei-Ro, Seodaemun-gu, Seoul 120-752, Korea.,Yonsei Proteome Research Center, Yonsei University , 262 Seongsanno, Seodaemun-gu, Seoul 120-749, Korea
| | - Susan Fanayan
- Department of Biomedical Sciences, Macquarie University , Sydney, New South Wales 2109, Australia
| | - William S Hancock
- Barnett Institute and Department of Chemistry and Chemical Biology, Northeastern University , 360 Huntington Avenue, Boston, Massachusetts 02115, United States
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Rao PH, Zhao S, Zhao YJ, Yu A, Rainusso N, Trucco M, Allen-Rhoades W, Satterfield L, Fuja D, Borra VJ, Man TK, Donehower LA, Yustein JT. Coamplification ofMyc/Pvt1and homozygous deletion ofNlrp1locus are frequent genetics changes in mouse osteosarcoma. Genes Chromosomes Cancer 2015; 54:796-808. [DOI: 10.1002/gcc.22291] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Revised: 07/19/2015] [Accepted: 07/29/2015] [Indexed: 01/10/2023] Open
Affiliation(s)
- Pulivarthi H. Rao
- Texas Children's Cancer and Hematology Centers, Department of Pediatrics; Baylor College of Medicine; Houston TX 77030
| | - Shuying Zhao
- Texas Children's Cancer and Hematology Centers, Department of Pediatrics; Baylor College of Medicine; Houston TX 77030
| | - Yi-Jue Zhao
- Texas Children's Cancer and Hematology Centers, Department of Pediatrics; Baylor College of Medicine; Houston TX 77030
| | - Alexander Yu
- Texas Children's Cancer and Hematology Centers, Department of Pediatrics; Baylor College of Medicine; Houston TX 77030
| | - Nino Rainusso
- Texas Children's Cancer and Hematology Centers, Department of Pediatrics; Baylor College of Medicine; Houston TX 77030
| | - Matteo Trucco
- Texas Children's Cancer and Hematology Centers, Department of Pediatrics; Baylor College of Medicine; Houston TX 77030
| | - Wendy Allen-Rhoades
- Texas Children's Cancer and Hematology Centers, Department of Pediatrics; Baylor College of Medicine; Houston TX 77030
| | - Laura Satterfield
- Integrative Molecular and Biological Sciences Program; Baylor College of Medicine; Houston TX 77030
| | - Daniel Fuja
- Integrative Molecular and Biological Sciences Program; Baylor College of Medicine; Houston TX 77030
| | - Vishnupriya J. Borra
- Texas Children's Cancer and Hematology Centers, Department of Pediatrics; Baylor College of Medicine; Houston TX 77030
| | - Tsz-Kwong Man
- Texas Children's Cancer and Hematology Centers, Department of Pediatrics; Baylor College of Medicine; Houston TX 77030
| | - Lawrence A. Donehower
- Texas Children's Cancer and Hematology Centers, Department of Pediatrics; Baylor College of Medicine; Houston TX 77030
- Department of Molecular & Cellular Biology; Baylor College of Medicine; Houston TX 77030
- Department of Molecular Virology & Microbiology; Baylor College of Medicine; Houston TX 77030
- Integrative Molecular and Biological Sciences Program; Baylor College of Medicine; Houston TX 77030
| | - Jason T. Yustein
- Texas Children's Cancer and Hematology Centers, Department of Pediatrics; Baylor College of Medicine; Houston TX 77030
- Department of Molecular & Cellular Biology; Baylor College of Medicine; Houston TX 77030
- Integrative Molecular and Biological Sciences Program; Baylor College of Medicine; Houston TX 77030
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64
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Wu L, Wang Y, Liu Y, Yu S, Xie H, Shi X, Qin S, Ma F, Tan TZ, Thiery JP, Chen L. A central role for TRPS1 in the control of cell cycle and cancer development. Oncotarget 2015; 5:7677-90. [PMID: 25277197 PMCID: PMC4202153 DOI: 10.18632/oncotarget.2291] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
The eukaryotic cell cycle is controlled by a complex regulatory network, which is still poorly understood. Here we demonstrate that TRPS1, an atypical GATA factor, modulates cell proliferation and controls cell cycle progression. Silencing TRPS1 had a differential effect on the expression of nine key cell cycle-related genes. Eight of these genes are known to be involved in the regulation of the G2 phase and the G2/M transition of the cell cycle. Using cell synchronization studies, we confirmed that TRPS1 plays an important role in the control of cells in these phases of the cell cycle. We also show that silencing TRPS1 controls the expression of 53BP1, but not TP53. TRPS1 silencing also decreases the expression of two histone deacetylases, HDAC2 and HDAC4, as well as the overall HDAC activity in the cells, and leads to the subsequent increase in the acetylation of histone4 K16 but not of histone3 K9 or K18. Finally, we demonstrate that TRPS1 expression is elevated in luminal breast cancer cells and luminal breast cancer tissues as compared with other breast cancer subtypes. Overall, our study proposes that TRPS1 acts as a central hub in the control of cell cycle and proliferation during cancer development.
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Affiliation(s)
- Lele Wu
- The Key Laboratory of Developmental Genes and Human Disease, Ministry of Education, Institute of Life Science, Southeast University, Nanjing, PR China. Contributed equally to this work
| | - Yuzhi Wang
- The Key Laboratory of Developmental Genes and Human Disease, Ministry of Education, Institute of Life Science, Southeast University, Nanjing, PR China. Contributed equally to this work
| | - Yan Liu
- The Key Laboratory of Developmental Genes and Human Disease, Ministry of Education, Institute of Life Science, Southeast University, Nanjing, PR China
| | - Shiyi Yu
- The Key Laboratory of Developmental Genes and Human Disease, Ministry of Education, Institute of Life Science, Southeast University, Nanjing, PR China
| | - Hao Xie
- The Key Laboratory of Developmental Genes and Human Disease, Ministry of Education, Institute of Life Science, Southeast University, Nanjing, PR China
| | - Xingjuan Shi
- The Key Laboratory of Developmental Genes and Human Disease, Ministry of Education, Institute of Life Science, Southeast University, Nanjing, PR China
| | - Sheng Qin
- Laboratory for Comparative Genomics and Bioinformatics and Jiangsu Key Laboratory for Biodiversity and Biotechnology, College of Life Science, Nanjing Normal University, Nanjing, China
| | - Fei Ma
- Laboratory for Comparative Genomics and Bioinformatics and Jiangsu Key Laboratory for Biodiversity and Biotechnology, College of Life Science, Nanjing Normal University, Nanjing, China
| | - Tuan Zea Tan
- Cancer Science Institute, National University of Singapore, 14 Medical Drive, Singapore
| | - Jean Paul Thiery
- Cancer Science Institute, National University of Singapore, 14 Medical Drive, Singapore. Institute of Molecular and Cell Biology, A*STAR, 61 Biopolis Drive, Singapore. Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, 8 Medical Drive, Singapore
| | - Liming Chen
- The Key Laboratory of Developmental Genes and Human Disease, Ministry of Education, Institute of Life Science, Southeast University, Nanjing, PR China
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Oztemur Y, Bekmez T, Aydos A, Yulug IG, Bozkurt B, Dedeoglu BG. A ranking-based meta-analysis reveals let-7 family as a meta-signature for grade classification in breast cancer. PLoS One 2015; 10:e0126837. [PMID: 25978727 PMCID: PMC4433233 DOI: 10.1371/journal.pone.0126837] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2014] [Accepted: 04/08/2015] [Indexed: 12/23/2022] Open
Abstract
Breast cancer is one of the most important causes of cancer-related deaths worldwide in women. In addition to gene expression studies, the progressing work in the miRNA area including miRNA microarray studies, brings new aspects to the research on the cancer development and progression. Microarray technology has been widely used to find new biomarkers in research and many transcriptomic microarray studies are available in public databases. In this study, the breast cancer miRNA and mRNA microarray studies were collected according to the availability of their data and clinical information, and combined by a newly developed ranking-based meta-analysis approach to find out candidate miRNA biomarkers (meta-miRNAs) that classify breast cancers according to their grades and explain the relation between miRNAs and mRNAs. This approach provided meta-miRNAs specific to breast cancer grades, pointing out let-7 family members as grade classifiers. The qRT-PCR studies performed with independent breast tumors confirmed the potential biomarker role of let-7 family members (meta-miRNAs). The concordance between the meta-mRNAs and miRNA target genes specific to tumor grade (common genes) supported the idea of mRNAs as miRNA targets. The pathway analysis results showed that most of the let-7 family miRNA targets, and also common genes, were significantly taking part in cancer-related pathways. The qRT-PCR studies, together with bioinformatic analyses, confirmed the results of meta-analysis approach, which is dynamic and allows combining datasets from different platforms.
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Affiliation(s)
| | - Tufan Bekmez
- Gazi University, Faculty of Dentistry, Ankara, Turkey
| | - Alp Aydos
- Ankara University, Biotechnology Institute, Ankara, Turkey
| | - Isik G. Yulug
- Bilkent University, Molecular Biology and Genetics Department, Ankara, Turkey
| | - Betul Bozkurt
- Ankara Numune Training and Research Hospital, Department of General Surgery, Ankara, Turkey
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66
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Ekumi KM, Paculova H, Lenasi T, Pospichalova V, Bösken CA, Rybarikova J, Bryja V, Geyer M, Blazek D, Barboric M. Ovarian carcinoma CDK12 mutations misregulate expression of DNA repair genes via deficient formation and function of the Cdk12/CycK complex. Nucleic Acids Res 2015; 43:2575-89. [PMID: 25712099 PMCID: PMC4357706 DOI: 10.1093/nar/gkv101] [Citation(s) in RCA: 93] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Revised: 01/05/2015] [Accepted: 01/30/2015] [Indexed: 12/11/2022] Open
Abstract
The Cdk12/CycK complex promotes expression of a subset of RNA polymerase II genes, including those of the DNA damage response. CDK12 is among only nine genes with recurrent somatic mutations in high-grade serous ovarian carcinoma. However, the influence of these mutations on the Cdk12/CycK complex and their link to cancerogenesis remain ill-defined. Here, we show that most mutations prevent formation of the Cdk12/CycK complex, rendering the kinase inactive. By examining the mutations within the Cdk12/CycK structure, we find that they likely provoke structural rearrangements detrimental to Cdk12 activation. Our mRNA expression analysis of the patient samples containing the CDK12 mutations reveals coordinated downregulation of genes critical to the homologous recombination DNA repair pathway. Moreover, we establish that the Cdk12/CycK complex occupies these genes and promotes phosphorylation of RNA polymerase II at Ser2. Accordingly, we demonstrate that the mutant Cdk12 proteins fail to stimulate the faithful DNA double strand break repair via homologous recombination. Together, we provide the molecular basis of how mutated CDK12 ceases to function in ovarian carcinoma. We propose that CDK12 is a tumor suppressor of which the loss-of-function mutations may elicit defects in multiple DNA repair pathways, leading to genomic instability underlying the genesis of the cancer.
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Affiliation(s)
- Kingsley M Ekumi
- Institute of Biomedicine, Biochemistry and Developmental Biology, University of Helsinki, Helsinki FIN-00014, Finland
| | - Hana Paculova
- Central European Institute of Technology (CEITEC), Masaryk University, 62500 Brno, Czech Republic
| | - Tina Lenasi
- Institute of Biomedicine, Biochemistry and Developmental Biology, University of Helsinki, Helsinki FIN-00014, Finland
| | - Vendula Pospichalova
- Institute of Experimental Biology, Faculty of Science, Masaryk University, 61137 Brno, Czech Republic
| | - Christian A Bösken
- Center of Advanced European Studies and Research, Group Physical Biochemistry, 53175 Bonn, Germany
| | - Jana Rybarikova
- Central European Institute of Technology (CEITEC), Masaryk University, 62500 Brno, Czech Republic
| | - Vitezslav Bryja
- Institute of Experimental Biology, Faculty of Science, Masaryk University, 61137 Brno, Czech Republic Institute of Biophysics, Academy of Sciences of the Czech Republic, 61265 Brno, Czech Republic
| | - Matthias Geyer
- Center of Advanced European Studies and Research, Group Physical Biochemistry, 53175 Bonn, Germany
| | - Dalibor Blazek
- Central European Institute of Technology (CEITEC), Masaryk University, 62500 Brno, Czech Republic
| | - Matjaz Barboric
- Institute of Biomedicine, Biochemistry and Developmental Biology, University of Helsinki, Helsinki FIN-00014, Finland
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Mehner C, Hockla A, Miller E, Ran S, Radisky DC, Radisky ES. Tumor cell-produced matrix metalloproteinase 9 (MMP-9) drives malignant progression and metastasis of basal-like triple negative breast cancer. Oncotarget 2015; 5:2736-49. [PMID: 24811362 PMCID: PMC4058041 DOI: 10.18632/oncotarget.1932] [Citation(s) in RCA: 258] [Impact Index Per Article: 28.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Matrix metalloproteinases (MMPs) have been implicated in diverse roles in breast cancer development and progression. While many of the different MMPs expressed in breast cancer are produced by stromal cells MMP-9 is produced mainly by the tumor cells themselves. To date, the functional role of tumor cell-produced MMP-9 has remained unclear. Here, we show that human breast cancer cell-produced MMP-9 is specifically required for invasion in cell culture and for pulmonary metastasis in a mouse orthotopic model of basal-like breast cancer. We also find that tumor cell-produced MMP-9 promotes tumor vascularization with only modest impact on primary tumor growth, and that silencing of MMP-9 expression in tumor cells leads to an altered transcriptional program consistent with reversion to a less malignant phenotype. MMP-9 is most highly expressed in human basal-like and triple negative tumors, where our data suggest that it contributes to metastatic progression. Our results suggest that MMP9 may offer a target for anti-metastatic therapies for basal-like triple negative breast cancers, a poor prognosis subtype with few available molecularly targeted therapeutic options.
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68
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Cichon MA, Nelson CM, Radisky DC. Regulation of epithelial-mesenchymal transition in breast cancer cells by cell contact and adhesion. Cancer Inform 2015; 14:1-13. [PMID: 25698877 PMCID: PMC4325704 DOI: 10.4137/cin.s18965] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Revised: 12/29/2014] [Accepted: 01/04/2015] [Indexed: 02/06/2023] Open
Abstract
Epithelial-mesenchymal transition (EMT) is a physiological program that is activated during cancer cell invasion and metastasis. We show here that EMT-related processes are linked to a broad and conserved program of transcriptional alterations that are influenced by cell contact and adhesion. Using cultured human breast cancer and mouse mammary epithelial cells, we find that reduced cell density, conditions under which cell contact is reduced, leads to reduced expression of genes associated with mammary epithelial cell differentiation and increased expression of genes associated with breast cancer. We further find that treatment of cells with matrix metalloproteinase-3 (MMP-3), an inducer of EMT, interrupts a defined subset of cell contact-regulated genes, including genes encoding a variety of RNA splicing proteins known to regulate the expression of Rac1b, an activated splice isoform of Rac1 known to be a key mediator of MMP-3-induced EMT in breast, lung, and pancreas. These results provide new insights into how MMPs act in cancer progression and how loss of cell-cell interactions is a key step in the earliest stages of cancer development.
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Affiliation(s)
- Magdalena A Cichon
- Department of Cancer Biology, Mayo Clinic Cancer Center, Jacksonville, FL USA
| | - Celeste M Nelson
- Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ, USA
- Department of Molecular Biology, Princeton University, Princeton, NJ, USA
| | - Derek C Radisky
- Department of Cancer Biology, Mayo Clinic Cancer Center, Jacksonville, FL USA
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Capdevila-Busquets E, Badiola N, Arroyo R, Alcalde V, Soler-López M, Aloy P. Breast cancer genes PSMC3IP and EPSTI1 play a role in apoptosis regulation. PLoS One 2015; 10:e0115352. [PMID: 25590583 PMCID: PMC4295872 DOI: 10.1371/journal.pone.0115352] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Accepted: 11/22/2014] [Indexed: 11/19/2022] Open
Abstract
A key element to delineate the biology of individual tumors is the regulation of apoptosis. In this work, we functionally characterize two breast cancer associated genes, the proteasome 26S subunit ATPase 3 interacting protein (PSMC3IP) and the epithelial-stromal interaction 1 (EPSTI1), to explore their potential apoptotic role in breast cancer. We first explore the existence of direct physical interactions with annotated BC-apoptotic genes. Based on the generated interaction network, we examine several apoptotic markers to determine the effect of PSMC3IP and EPSTI1 gene expression modulation in two different human breast cancer cell lines to suggest potential molecular mechanisms to unveil their role in the disease. Our results show that PSMC3IP and EPSTI1 are able to modulate the extrinsic apoptotic pathway in estrogen receptor positive and triple negative breast cancer cell lines, highlighting them as potential therapeutic targets.
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Affiliation(s)
- Eva Capdevila-Busquets
- Joint IRB-BSC-CRG Program in Computational Biology, Institute for Research in Biomedicine (IRB Barcelona), Barcelona, Catalonia, Spain
| | - Nahuai Badiola
- Joint IRB-BSC-CRG Program in Computational Biology, Institute for Research in Biomedicine (IRB Barcelona), Barcelona, Catalonia, Spain
| | - Rodrigo Arroyo
- Joint IRB-BSC-CRG Program in Computational Biology, Institute for Research in Biomedicine (IRB Barcelona), Barcelona, Catalonia, Spain
| | - Víctor Alcalde
- Joint IRB-BSC-CRG Program in Computational Biology, Institute for Research in Biomedicine (IRB Barcelona), Barcelona, Catalonia, Spain
| | - Montserrat Soler-López
- Joint IRB-BSC-CRG Program in Computational Biology, Institute for Research in Biomedicine (IRB Barcelona), Barcelona, Catalonia, Spain
| | - Patrick Aloy
- Joint IRB-BSC-CRG Program in Computational Biology, Institute for Research in Biomedicine (IRB Barcelona), Barcelona, Catalonia, Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Catalonia, Spain
- * E-mail:
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70
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Madden SF, Clarke C, Gaule P, Aherne ST, O'Donovan N, Clynes M, Crown J, Gallagher WM. BreastMark: an integrated approach to mining publicly available transcriptomic datasets relating to breast cancer outcome. Breast Cancer Res 2014; 15:R52. [PMID: 23820017 PMCID: PMC3978487 DOI: 10.1186/bcr3444] [Citation(s) in RCA: 109] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2012] [Revised: 05/14/2013] [Accepted: 07/02/2013] [Indexed: 12/21/2022] Open
Abstract
Introduction Breast cancer is a complex heterogeneous disease for which a substantial resource of transcriptomic data is available. Gene expression data have facilitated the division of breast cancer into, at least, five molecular subtypes, namely luminal A, luminal B, HER2, normal-like and basal. Once identified, breast cancer subtypes can inform clinical decisions surrounding patient treatment and prognosis. Indeed, it is important to identify patients at risk of developing aggressive disease so as to tailor the level of clinical intervention. Methods We have developed a user-friendly, web-based system to allow the evaluation of genes/microRNAs (miRNAs) that are significantly associated with survival in breast cancer and its molecular subtypes. The algorithm combines gene expression data from multiple microarray experiments which frequently also contain miRNA expression information, and detailed clinical data to correlate outcome with gene/miRNA expression levels. This algorithm integrates gene expression and survival data from 26 datasets on 12 different microarray platforms corresponding to approximately 17,000 genes in up to 4,738 samples. In addition, the prognostic potential of 341 miRNAs can be analysed. Results We demonstrated the robustness of our approach in comparison to two commercially available prognostic tests, oncotype DX and MammaPrint. Our algorithm complements these prognostic tests and is consistent with their findings. In addition, BreastMark can act as a powerful reductionist approach to these more complex gene signatures, eliminating superfluous genes, potentially reducing the cost and complexity of these multi-index assays. Known miRNA prognostic markers, mir-205 and mir-93, were used to confirm the prognostic value of this tool in a miRNA setting. We also applied the algorithm to examine expression of 58 receptor tyrosine kinases in the basal-like subtype, identifying six receptor tyrosine kinases associated with poor disease-free survival and/or overall survival (EPHA5, FGFR1, FGFR3, VEGFR1, PDGFRβ, and TIE1). A web application for using this algorithm is currently available. Conclusions BreastMark is a powerful tool for examining putative gene/miRNA prognostic markers in breast cancer. The value of this tool will be in the preliminary assessment of putative biomarkers in breast cancer. It will be of particular use to research groups with limited bioinformatics facilities.
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71
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Hu Q, Luo Z, Xu T, Zhang JY, Zhu Y, Chen WX, Zhong SL, Zhao JH, Tang JH. FOXA1: a promising prognostic marker in breast cancer. Asian Pac J Cancer Prev 2014; 15:11-6. [PMID: 24528009 DOI: 10.7314/apjcp.2014.15.1.11] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Accurate diagnosis and proper monitoring of cancer patients remain important obstacles for successful cancer treatment. The search for cancer biomarkers can aid in more accurate prediction of clinical outcome and may also reveal novel predictive factors and therapeutic targets. One such prognostic marker seems to be FOXA1. Many studies have shown that FOXA1 is strongly expressed in a vast majority of cancers, including breast cancer, in which high expression is associated with a good prognosis. In this review, we summarize the role of this transcription factor in the development and prognosis of breast cancer in the hope of providing insights into utility of FOXA1 as a novel biomarker.
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Affiliation(s)
- Qing Hu
- Department of General Surgery, Xuzhou Medical College, Xuzhou, China E-mail : ,
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72
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Newton R, Wernisch L. A meta-analysis of multiple matched copy number and transcriptomics data sets for inferring gene regulatory relationships. PLoS One 2014; 9:e105522. [PMID: 25148247 PMCID: PMC4141782 DOI: 10.1371/journal.pone.0105522] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2014] [Accepted: 07/21/2014] [Indexed: 12/25/2022] Open
Abstract
Inferring gene regulatory relationships from observational data is challenging. Manipulation and intervention is often required to unravel causal relationships unambiguously. However, gene copy number changes, as they frequently occur in cancer cells, might be considered natural manipulation experiments on gene expression. An increasing number of data sets on matched array comparative genomic hybridisation and transcriptomics experiments from a variety of cancer pathologies are becoming publicly available. Here we explore the potential of a meta-analysis of thirty such data sets. The aim of our analysis was to assess the potential of in silico inference of trans-acting gene regulatory relationships from this type of data. We found sufficient correlation signal in the data to infer gene regulatory relationships, with interesting similarities between data sets. A number of genes had highly correlated copy number and expression changes in many of the data sets and we present predicted potential trans-acted regulatory relationships for each of these genes. The study also investigates to what extent heterogeneity between cell types and between pathologies determines the number of statistically significant predictions available from a meta-analysis of experiments.
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Affiliation(s)
- Richard Newton
- Biostatistics Unit, Medical Research Council, Cambridge, United Kingdom
- * E-mail:
| | - Lorenz Wernisch
- Biostatistics Unit, Medical Research Council, Cambridge, United Kingdom
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73
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Hongisto V, Aure MR, Mäkelä R, Sahlberg KK. The HER2 amplicon includes several genes required for the growth and survival of HER2 positive breast cancer cells - A data description. GENOMICS DATA 2014; 2:249-53. [PMID: 26484103 PMCID: PMC4536024 DOI: 10.1016/j.gdata.2014.06.025] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/10/2014] [Revised: 06/26/2014] [Accepted: 06/30/2014] [Indexed: 12/02/2022]
Abstract
A large number of breast cancers are characterized by amplification and overexpression of the chromosome segment surrounding the HER2 (ERBB2) oncogene. As the HER2 amplicon at 17q12 contains multiple genes, we have systematically explored the role of the HER2 co-amplified genes in breast cancer cell growth and their relation to trastuzumab resistance. We integrated array comparative genomic hybridization (aCGH) data of the HER2 amplicon from 71 HER2 positive breast tumors and 10 cell lines with systematic functional RNA interference analysis of 23 core amplicon genes with several phenotypic endpoints in a panel of trastuzumab responding and non-responding HER2 positive breast cancer cells. In this Data in Brief we give a detailed description of the experimental procedures and the data analysis methods used in the study (1).
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Affiliation(s)
- Vesa Hongisto
- VTT Technical Research Centre of Finland, Turku, Finland
| | - Miriam Ragle Aure
- K.G. Jebsen Centre of Breast Cancer, Department of Genetics, Institute for Cancer Research, Oslo University Hospital, Oslo, Norway
| | - Rami Mäkelä
- VTT Technical Research Centre of Finland, Turku, Finland
| | - Kristine Kleivi Sahlberg
- K.G. Jebsen Centre of Breast Cancer, Department of Genetics, Institute for Cancer Research, Oslo University Hospital, Oslo, Norway ; Department of Research, VestreViken, Drammen, Norway
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74
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Li Y, Li S, Chen J, Shao T, Jiang C, Wang Y, Chen H, Xu J, Li X. Comparative epigenetic analyses reveal distinct patterns of oncogenic pathways activation in breast cancer subtypes. Hum Mol Genet 2014; 23:5378-93. [DOI: 10.1093/hmg/ddu256] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
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75
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Li S, Li S, Sun Y, Li L. The expression of β-catenin in different subtypes of breast cancer and its clinical significance. Tumour Biol 2014; 35:7693-8. [PMID: 24801904 DOI: 10.1007/s13277-014-1975-0] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2014] [Accepted: 04/15/2014] [Indexed: 12/21/2022] Open
Abstract
The Wnt/β-catenin signaling pathway is implicated in mammary oncogenesis. Reports of β-catenin expression and its association with outcome in breast cancer are controversial. This study was performed to address the distribution of β-catenin expression in invasive breast cancer and the correlation between β-catenin expression and survival of breast cancer patients, and to determine whether β-catenin was specifically activated in any molecular subtypes. Immunohistochemistry was performed on a tissue microarray containing 169 invasive breast cancers to detect expression of β-catenin. One hundred thirty one of the 169 patients were followed up. Correlation between β-catenin expression and different molecular subtypes was determined using chi-square analysis. Overall survival (OS) was analyzed by Kaplan-Meier method with log-rank test. The invasive breast cancer displayed the different patterns of β-catenin expression from normal tissues with significantly increased cytoplasmic and nuclear staining of β-catenin. Aberrant β-catenin expression was observed in 109 in the 169 cases (64.50 %), and there was no difference in β-catenin expression in the four molecular subtypes. Furthermore, aberrant β-catenin expression was significantly associated with adverse outcome not only in the entire cohort but also in each of the different molecular subtypes. β-catenin activation is preferentially found and is associated with a poor clinical outcome in invasive breast cancer independent of molecular subtype.
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Affiliation(s)
- Shuguang Li
- Department of Medical Oncology, Cancer Center, Qilu Hospital of Shandong University, Wenhuaxi Road 107#, 250012, Jinan, China
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76
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Frequent MYC coamplification and DNA hypomethylation of multiple genes on 8q in 8p11-p12-amplified breast carcinomas. Oncogenesis 2014; 3:e95. [PMID: 24662924 PMCID: PMC4038389 DOI: 10.1038/oncsis.2014.8] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2013] [Revised: 01/22/2014] [Accepted: 01/27/2014] [Indexed: 12/21/2022] Open
Abstract
Genetic and epigenetic (DNA methylation, histone modifications, microRNA expression) crosstalk promotes inactivation of tumor suppressor genes or activation of oncogenes by gene loss/hypermethylation or duplications/hypomethylation, respectively. The 8p11-p12 chromosomal region is a hotspot for genomic aberrations (chromosomal rearrangements, amplifications and deletions) in several cancer forms, including breast carcinoma where amplification has been associated with increased proliferation rates and reduced patient survival. Here, an integrative genomics screen (DNA copy number, transcriptional and DNA methylation profiling) performed in 229 primary invasive breast carcinomas identified substantial coamplification of the 8p11-p12 genomic region and the MYC oncogene (8q24.21), as well as aberrant methylation and transcriptional patterns for several genes spanning the 8q12.1-q24.22 genomic region (ENPP2, FABP5, IMPAD1, NDRG1, PLEKHF2, RRM2B, SQLE, TAF2, TATDN1, TRPS1, VPS13B). Taken together, our findings suggest that MYC activity and aberrant DNA methylation may also have a pivotal role in the aggressive tumor phenotype frequently observed in breast carcinomas harboring 8p11-p12 regional amplification.
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Hatzfeld M, Wolf A, Keil R. Plakophilins in Desmosomal Adhesion and Signaling. ACTA ACUST UNITED AC 2014; 21:25-42. [DOI: 10.3109/15419061.2013.876017] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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78
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Candidate luminal B breast cancer genes identified by genome, gene expression and DNA methylation profiling. PLoS One 2014; 9:e81843. [PMID: 24416132 PMCID: PMC3886975 DOI: 10.1371/journal.pone.0081843] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2013] [Accepted: 10/17/2013] [Indexed: 01/19/2023] Open
Abstract
Breast cancers (BCs) of the luminal B subtype are estrogen receptor-positive (ER+), highly proliferative, resistant to standard therapies and have a poor prognosis. To better understand this subtype we compared DNA copy number aberrations (CNAs), DNA promoter methylation, gene expression profiles, and somatic mutations in nine selected genes, in 32 luminal B tumors with those observed in 156 BCs of the other molecular subtypes. Frequent CNAs included 8p11-p12 and 11q13.1-q13.2 amplifications, 7q11.22-q34, 8q21.12-q24.23, 12p12.3-p13.1, 12q13.11-q24.11, 14q21.1-q23.1, 17q11.1-q25.1, 20q11.23-q13.33 gains and 6q14.1-q24.2, 9p21.3-p24,3, 9q21.2, 18p11.31-p11.32 losses. A total of 237 and 101 luminal B-specific candidate oncogenes and tumor suppressor genes (TSGs) presented a deregulated expression in relation with their CNAs, including 11 genes previously reported associated with endocrine resistance. Interestingly, 88% of the potential TSGs are located within chromosome arm 6q, and seven candidate oncogenes are potential therapeutic targets. A total of 100 candidate oncogenes were validated in a public series of 5,765 BCs and the overexpression of 67 of these was associated with poor survival in luminal tumors. Twenty-four genes presented a deregulated expression in relation with a high DNA methylation level. FOXO3, PIK3CA and TP53 were the most frequent mutated genes among the nine tested. In a meta-analysis of next-generation sequencing data in 875 BCs, KCNB2 mutations were associated with luminal B cases while candidate TSGs MDN1 (6q15) and UTRN (6q24), were mutated in this subtype. In conclusion, we have reported luminal B candidate genes that may play a role in the development and/or hormone resistance of this aggressive subtype.
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79
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Wang W, Deng Z, Hatcher H, Miller LD, Di X, Tesfay L, Sui G, D'Agostino RB, Torti FM, Torti SV. IRP2 regulates breast tumor growth. Cancer Res 2013; 74:497-507. [PMID: 24285726 DOI: 10.1158/0008-5472.can-13-1224] [Citation(s) in RCA: 93] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Experimental and epidemiologic evidence suggests that dysregulation of proteins involved in iron metabolism plays a critical role in cancer. The mechanisms by which cancer cells alter homeostatic iron regulation are just beginning to be understood. Here, we demonstrate that iron regulatory protein 2 (IRP2) plays a key role in iron accumulation in breast cancer. Although both IRP1 and IRP2 are overexpressed in breast cancer, the overexpression of IRP2, but not IRP1, is associated with decreased ferritin H and increased transferrin receptor 1 (TfR1). Knockdown of IRP2 in triple-negative MDA-MB-231 human breast cancer cells increases ferritin H expression and decreases TfR1 expression, resulting in a decrease in the labile iron pool. Further, IRP2 knockdown reduces growth of MDA-MB-231 cells in the mouse mammary fat pad. Gene expression microarray profiles of patients with breast cancer demonstrate that increased IRP2 expression is associated with high-grade cancer. Increased IRP2 expression is observed in luminal A, luminal B, and basal breast cancer subtypes, but not in breast tumors of the ERBB2 molecular subtype. These results suggest that dysregulation of IRP2 is an early nodal point underlying altered iron metabolism in breast cancer and may contribute to poor outcome of some patients with breast cancer.
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Affiliation(s)
- Wei Wang
- Authors' Affiliations: Departments of Pathology, Cancer Biology, and Biostatistical Sciences, Wake Forest School of Medicine, Winston-Salem, North Carolina; Departments of Molecular, Microbial and Structural Biology and Internal Medicine, University of Connecticut Health Center, Farmington, Connecticut
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Bu W, Zhang X, Dai H, Huang S, Li Y. Mammary cells with active Wnt signaling resist ErbB2-induced tumorigenesis. PLoS One 2013; 8:e78720. [PMID: 24265712 PMCID: PMC3827100 DOI: 10.1371/journal.pone.0078720] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2013] [Accepted: 09/20/2013] [Indexed: 11/23/2022] Open
Abstract
Aberrant activation of Wnt signaling is frequent in human malignancies. In normal epithelial tissues, including the breast, Wnt signaling is active only in a subset of cells, but it is unknown whether this subset of Wnt signaling-active cells is at increased risk of carcinogenesis. We created transgenic mice (TOP-tva) in which the synthetic Wnt-responsive promoter TOP controlled the gene encoding TVA, which confers susceptibility to infection by the retroviral vector RCAS. Thus, only cells in which Wnt signaling is active will express tva and be targeted by RCAS. Surprisingly, we found that RCAS-mediated delivery of cDNA encoding a constitutively activated version of ErbB2 (HER2/Neu) into the small number of TVA+ mammary epithelial cells in TOP-tva mice failed to induce tumor, while the same virus readily induced mammary tumors after it was delivered into a comparable number of cells in our previously reported mouse line MMTV-tva, whose tva is broadly expressed in mammary epithelium. Furthermore, we could not even detect any early lesions or infected cells in TOP-tva mice at the time of necropsy. Therefore, we conclude that the Wnt pathway-active cell subset in the normal mammary epithelium does not evolve into tumors following ErbB2 activation–rather, they apparently die due to apoptosis, an anticancer “barrier” that we have reported to be erected in some mammary cells followed ErbB2 activation. In accord with these mouse model data, we found that unlike the basal subtype, ErbB2+ human breast cancers rarely involve aberrant activation of Wnt signaling. This is the first report of a defined sub-population of mammalian cells that is “protected” from tumorigenesis by a potent oncogene, and provides direct in vivo evidence that mammary epithelial cells are not equal in their response to oncogene-initiated transformation.
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Affiliation(s)
- Wen Bu
- Lester & Sue Smith Breast Center, Baylor College of Medicine, Houston, Texas, United States of America
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, Texas, United States of America
| | - Xiang Zhang
- Lester & Sue Smith Breast Center, Baylor College of Medicine, Houston, Texas, United States of America
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, Texas, United States of America
| | - Hua Dai
- Lester & Sue Smith Breast Center, Baylor College of Medicine, Houston, Texas, United States of America
- Department of Physiology, School of Medicine, Yangzhou University, Yangzhou, Jiangsu, China
| | - Shixia Huang
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, Texas, United States of America
| | - Yi Li
- Lester & Sue Smith Breast Center, Baylor College of Medicine, Houston, Texas, United States of America
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, Texas, United States of America
- * E-mail:
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81
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Adams A, van Brussel ASA, Vermeulen JF, Mali WPTM, van der Wall E, van Diest PJ, Elias SG. The potential of hypoxia markers as target for breast molecular imaging--a systematic review and meta-analysis of human marker expression. BMC Cancer 2013; 13:538. [PMID: 24206539 PMCID: PMC3903452 DOI: 10.1186/1471-2407-13-538] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2013] [Accepted: 10/23/2013] [Indexed: 02/07/2023] Open
Abstract
Background Molecular imaging of breast cancer is a promising emerging technology, potentially able to improve clinical care. Valid imaging targets for molecular imaging tracer development are membrane-bound hypoxia-related proteins, expressed when tumor growth outpaces neo-angiogenesis. We performed a systematic literature review and meta-analysis of such hypoxia marker expression rates in human breast cancer to evaluate their potential as clinically relevant molecular imaging targets. Methods We searched MEDLINE and EMBASE for articles describing membrane-bound proteins that are related to hypoxia inducible factor 1α (HIF-1α), the key regulator of the hypoxia response. We extracted expression rates of carbonic anhydrase-IX (CAIX), glucose transporter-1 (GLUT1), C-X-C chemokine receptor type-4 (CXCR4), or insulin-like growth factor-1 receptor (IGF1R) in human breast disease, evaluated by immunohistochemistry. We pooled study results using random-effects models and applied meta-regression to identify associations with clinicopathological variables. Results Of 1,705 identified articles, 117 matched our selection criteria, totaling 30,216 immunohistochemistry results. We found substantial between-study variability in expression rates. Invasive cancer showed pooled expression rates of 35% for CAIX (95% confidence interval (CI): 26-46%), 51% for GLUT1 (CI: 40-61%), 46% for CXCR4 (CI: 33-59%), and 46% for IGF1R (CI: 35-70%). Expression rates increased with tumor grade for GLUT1, CAIX, and CXCR4 (all p < 0.001), but decreased for IGF1R (p < 0.001). GLUT1 showed the highest expression rate in grade III cancers with 58% (45-69%). CXCR4 showed the highest expression rate in small T1 tumors with 48% (CI: 28-69%), but associations with size were only significant for CAIX (p < 0.001; positive association) and IGF1R (p = 0.047; negative association). Although based on few studies, CAIX, GLUT1, and CXCR4 showed profound lower expression rates in normal breast tissue and benign breast disease (p < 0.001), and high rates in carcinoma in situ. Invasive lobular carcinoma consistently showed lower expression rates (p < 0.001). Conclusions Our results support the potential of hypoxia-related markers as breast cancer molecular imaging targets. Although specificity is promising, combining targets would be necessary for optimal sensitivity. These data could help guide the choice of imaging targets for tracer development depending on the envisioned clinical application.
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Affiliation(s)
- Arthur Adams
- Department of Radiology, University Medical Center Utrecht, Utrecht, The Netherlands.
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82
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Dey N, Barwick BG, Moreno CS, Ordanic-Kodani M, Chen Z, Oprea-Ilies G, Tang W, Catzavelos C, Kerstann KF, Sledge GW, Abramovitz M, Bouzyk M, De P, Leyland-Jones BR. Wnt signaling in triple negative breast cancer is associated with metastasis. BMC Cancer 2013; 13:537. [PMID: 24209998 PMCID: PMC4226307 DOI: 10.1186/1471-2407-13-537] [Citation(s) in RCA: 192] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2013] [Accepted: 10/21/2013] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND Triple Negative subset of (TN) Breast Cancers (BC), a close associate of the basal-like subtype (with limited discordance) is an aggressive form of the disease which convey unpredictable, and poor prognosis due to limited treatment options and lack of proven effective targeted therapies. METHODS We conducted an expression study of 240 formalin-fixed, paraffin-embedded (FFPE) primary biopsies from two cohorts, including 130 TN tumors, to identify molecular mechanisms of TN disease. RESULTS The annotation of differentially expressed genes in TN tumors contained an overrepresentation of canonical Wnt signaling components in our cohort and others. These observations were supported by upregulation of experimentally induced oncogenic Wnt/β-catenin genes in TN tumors, recapitulated using targets induced by Wnt3A. A functional blockade of Wnt/β-catenin pathway by either a pharmacological Wnt-antagonist, WntC59, sulidac sulfide, or β-catenin (functional read out of Wnt/β-catenin pathway) SiRNA mediated genetic manipulation demonstrated that a functional perturbation of the pathway is causal to the metastasis- associated phenotypes including fibronectin-directed migration, F-actin organization, and invasion in TNBC cells. A classifier, trained on microarray data from β-catenin transfected mammary cells, identified a disproportionate number of TNBC breast tumors as compared to other breast cancer subtypes in a meta-analysis of 11 studies and 1,878 breast cancer patients, including the two cohorts published here. Patients identified by the Wnt/β-catenin classifier had a greater risk of lung and brain, but not bone metastases. CONCLUSION These data implicate transcriptional Wnt signaling as a hallmark of TNBC disease associated with specific metastatic pathways.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | - Brian R Leyland-Jones
- Edith Sanford Breast Cancer, Sanford Research, 2301 E 60th Street N, Sioux Falls, SD 57104, USA.
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83
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Matsenko NY, Kovalenko SP. DNA structural features on borders of ERBB2 amplicons in breast cancer. Mol Biol 2013. [DOI: 10.1134/s0026893313050142] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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84
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Abstract
Breast cancer is the most frequent and the most deadly cancer in women in Western countries. Different classifications of disease (anatomoclinical, pathological, prognostic, genetic) are used for guiding the management of patients. Unfortunately, they fail to reflect the whole clinical heterogeneity of the disease. Consequently, molecularly distinct diseases are grouped in similar clinical classes, likely explaining the different clinical outcome between patients in a given class, and the fact that selection of the most appropriate diagnostic or therapeutic strategy for each patient is not done accurately. Today, treatment is efficient in only 70.0–75.0% of cases overall. Our repertoire of efficient drugs is limited but is being expanded with the discovery of new molecular targets for new drugs, based on the identification of candidate oncogenes and tumor suppressor genes (TSG) functionally relevant in disease. Development of new drugs makes therapeutical decisions even more demanding of reliable classifiers and prognostic/predictive tests. Breast cancer is a complex, heterogeneous disease at the molecular level. The combinatorial molecular origin and the heterogeneity of malignant cells, and the variability of the host background, create distinct subgroups of tumors endowed with different phenotypic features such as response to therapy and clinical outcome. Cellular and molecular analyses can identify new classes biologically and clinically relevant, as well as provide new clinically relevant markers and targets. The various stages of mammary tumorigenesis are not clearly defined and the genetic and epigenetic events critical to the development and aggressiveness of breast cancer are not precisely known. Because the phenotype of tumors is dependent on many genes, a large-scale and integrated molecular characterization of the genetic and epigenetic alterations and gene expression deregulation should allow the identification of new molecular classes clinically relevant, as well as among the altered genes and/or pathways, the identification of more accurate molecular diagnostic, prognostic/predictive factors, and for some of them, after functional validation, the identification of new therapeutic targets.
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85
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Improving Pathological Assessment of Breast Cancer by Employing Array-Based Transcriptome Analysis. MICROARRAYS 2013; 2:228-42. [PMID: 27605190 PMCID: PMC5003464 DOI: 10.3390/microarrays2030228] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2013] [Revised: 08/17/2013] [Accepted: 08/22/2013] [Indexed: 01/13/2023]
Abstract
Breast cancer research has paved the way of personalized oncology with the introduction of hormonal therapy and the measurement of estrogen receptor as the first widely accepted clinical biomarker. The expression of another receptor—HER2/ERBB2/neu—was initially a sign of worse prognosis, but targeted therapy has granted improved outcome for these patients so that today HER2 positive patients have better prognosis than HER2 negative patients. Later, the introduction of multigene assays provided the pathologists with an unbiased assessment of the tumors’ molecular fingerprint. The recent FDA approval of complete microarray pipelines has opened new possibilities for the objective classification of breast cancer samples. Here we review the applications of microarrays for determining ER and HER2 status, molecular subtypes as well as predicting prognosis and grade for breast cancer patients. An open question remains the role of single genes within such signatures. Openly available microarray datasets enable the execution of an independent cross-validation of new marker and signature candidates. In summary, we review the current state regarding clinical applications of microarrays in breast cancer molecular pathology.
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86
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Exploring novel targets of basal-like breast carcinoma by comparative gene profiling and mechanism analysis. Breast Cancer Res Treat 2013; 141:23-32. [PMID: 23933801 DOI: 10.1007/s10549-013-2664-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2013] [Accepted: 08/02/2013] [Indexed: 12/30/2022]
Abstract
The heterogeneity of breast cancer makes its diagnosis and treatment far from being optimal. Analysis of traditional pathological and prognostic markers based on immunohistochemistry (IHC) is inadequate in elucidating the inherent heterogeneity of breast cancer, especially basal-like breast carcinoma (BLBC) which displays complex and unique epidemiological, phenotypic, and molecular features with distinctive relapse patterns and poor clinical outcomes. Gene expression profiling opened an avenue in research as independent predictors by classifying breast cancers into discrete groups with prognostic references, but it is not cost-effective in clinical application. It is necessary to develop an effective predictive gene list from gene profiling to optimize the treatment with traditional markers. In this report, we analyzed the correlation between IHC and gene profiling of breast cancer with an emphasis on the BLBC, highlighting the potential discovery of diagnostic markers and cellular mechanisms that may guide the development of BLBC-targeted therapy. Random forest-based classification and PAM50 gene-sets were used in the comparison analysis of traditional prognostic markers including estrogen receptor (ER), progesterone receptor (PR), human epidermal growth factor receptor 2 (HER2), and microarray profiles. An intrinsic 40-gene set was developed to classify breast cancer subtypes, and genes expression differentiations were used to explore the different mechanisms between the BLBC and non-BLBC subtypes based on the comparison of clinicopathological markers and microarray profiling. Pathways and DNA repairs were analyzed to evaluate the biological mechanisms in BLBC and other breast cancer subtypes. It is reasonable to define BLBC as those tumors that are negative for ER, PR, and HER2 by IHC for their accordance with gene expression profiles. Focal adhesion kinase, ERBB, and their signaling pathways may play crucial role in BLBC. The intrinsic 40-gene set can be used to classify breast cancer and help to optimize therapeutic management of BLBC.
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87
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Clarke C, Madden SF, Doolan P, Aherne ST, Joyce H, O'Driscoll L, Gallagher WM, Hennessy BT, Moriarty M, Crown J, Kennedy S, Clynes M. Correlating transcriptional networks to breast cancer survival: a large-scale coexpression analysis. Carcinogenesis 2013; 34:2300-8. [PMID: 23740839 DOI: 10.1093/carcin/bgt208] [Citation(s) in RCA: 267] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Weighted gene coexpression network analysis (WGCNA) is a powerful 'guilt-by-association'-based method to extract coexpressed groups of genes from large heterogeneous messenger RNA expression data sets. We have utilized WGCNA to identify 11 coregulated gene clusters across 2342 breast cancer samples from 13 microarray-based gene expression studies. A number of these transcriptional modules were found to be correlated to clinicopathological variables (e.g. tumor grade), survival endpoints for breast cancer as a whole (disease-free survival, distant disease-free survival and overall survival) and also its molecular subtypes (luminal A, luminal B, HER2+ and basal-like). Examples of findings arising from this work include the identification of a cluster of proliferation-related genes that when upregulated correlated to increased tumor grade and were associated with poor survival in general. The prognostic potential of novel genes, for example, ubiquitin-conjugating enzyme E2S (UBE2S) within this group was confirmed in an independent data set. In addition, gene clusters were also associated with survival for breast cancer molecular subtypes including a cluster of genes that was found to correlate with prognosis exclusively for basal-like breast cancer. The upregulation of several single genes within this coexpression cluster, for example, the potassium channel, subfamily K, member 5 (KCNK5) was associated with poor outcome for the basal-like molecular subtype. We have developed an online database to allow user-friendly access to the coexpression patterns and the survival analysis outputs uncovered in this study (available at http://glados.ucd.ie/Coexpression/).
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Affiliation(s)
- Colin Clarke
- National Institute for Cellular Biotechnology and
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88
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Sahlberg KK, Hongisto V, Edgren H, Mäkelä R, Hellström K, Due EU, Moen Vollan HK, Sahlberg N, Wolf M, Børresen-Dale AL, Perälä M, Kallioniemi O. The HER2 amplicon includes several genes required for the growth and survival of HER2 positive breast cancer cells. Mol Oncol 2013; 7:392-401. [PMID: 23253899 PMCID: PMC5528495 DOI: 10.1016/j.molonc.2012.10.012] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2012] [Revised: 10/25/2012] [Accepted: 10/25/2012] [Indexed: 10/27/2022] Open
Abstract
About 20% of breast cancers are characterized by amplification and overexpression of the HER2 oncogene. Although significant progress has been achieved for treating such patients with HER2 inhibitor trastuzumab, more than half of the patients respond poorly or become resistant to the treatment. Since the HER2 amplicon at 17q12 contains multiple genes, we have systematically explored the role of the HER2 co-amplified genes in breast cancer cell growth and their relation to trastuzumab resistance. We integrated aCGH data of the HER2 amplicon from 71 HER2 positive breast tumors and 10 cell lines with systematic functional RNA interference analysis of 23 core amplicon genes with several phenotypic endpoints in a panel of trastuzumab responding and non-responding HER2 positive breast cancer cells. Silencing of HER2 caused a greater growth arrest and apoptosis in the responding compared to the non-responding cell lines, indicating that the resistant cells are inherently less dependent on the HER2 pathway. Several other genes in the amplicon also showed a more pronounced effect when silenced; indicating that expression of HER2 co-amplified genes may be needed to sustain the growth of breast cancer cells. Importantly, co-silencing of STARD3, GRB7, PSMD3 and PERLD1 together with HER2 led to an additive inhibition of cell viability as well as induced apoptosis. These studies indicate that breast cancer cells may become addicted to the amplification of several genes that reside in the HER2 amplicon. The simultaneous targeting of these genes may increase the efficacy of the anti-HER2 therapies and possibly also counteract trastuzumab resistance. The observed additive effects seem to culminate to both apoptosis and cell proliferation pathways indicating that these pathways may be interesting targets for combinatorial treatment of HER2+ breast cancers.
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Affiliation(s)
- Kristine Kleivi Sahlberg
- Department of Genetics, Institute for Cancer Research, Division of Surgery and Cancer, Oslo University Hospital, Radiumhospitalet, 0310 Oslo, Norway
- Medical Biotechnology, VTT Technical Research Centre of Finland, Turku, Finland
| | - Vesa Hongisto
- Medical Biotechnology, VTT Technical Research Centre of Finland, Turku, Finland
| | - Henrik Edgren
- Institute for Molecular Medicine Finland (FIMM), University of Helsinki, Helsinki, Finland
| | - Rami Mäkelä
- Medical Biotechnology, VTT Technical Research Centre of Finland, Turku, Finland
| | - Kirsi Hellström
- Medical Biotechnology, VTT Technical Research Centre of Finland, Turku, Finland
| | - Eldri U. Due
- Department of Genetics, Institute for Cancer Research, Division of Surgery and Cancer, Oslo University Hospital, Radiumhospitalet, 0310 Oslo, Norway
| | - Hans Kristian Moen Vollan
- Department of Genetics, Institute for Cancer Research, Division of Surgery and Cancer, Oslo University Hospital, Radiumhospitalet, 0310 Oslo, Norway
- Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, 0318 Oslo, Norway
- Department of Breast and Endocrine Surgery, Division of Surgery and Cancer, Oslo University Hospital, Ullevål, 0450 Oslo, Norway
| | - Niko Sahlberg
- Medical Biotechnology, VTT Technical Research Centre of Finland, Turku, Finland
| | - Maija Wolf
- Institute for Molecular Medicine Finland (FIMM), University of Helsinki, Helsinki, Finland
| | - Anne-Lise Børresen-Dale
- Department of Genetics, Institute for Cancer Research, Division of Surgery and Cancer, Oslo University Hospital, Radiumhospitalet, 0310 Oslo, Norway
- Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, 0318 Oslo, Norway
| | - Merja Perälä
- Medical Biotechnology, VTT Technical Research Centre of Finland, Turku, Finland
| | - Olli Kallioniemi
- Medical Biotechnology, VTT Technical Research Centre of Finland, Turku, Finland
- Institute for Molecular Medicine Finland (FIMM), University of Helsinki, Helsinki, Finland
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89
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Schade B, Lesurf R, Sanguin-Gendreau V, Bui T, Deblois G, O'Toole SA, Millar EK, Zardawi SJ, Lopez-Knowles E, Sutherland RL, Giguère V, Kahn M, Hallett M, Muller WJ. β-Catenin Signaling Is a Critical Event in ErbB2-Mediated Mammary Tumor Progression. Cancer Res 2013; 73:4474-87. [DOI: 10.1158/0008-5472.can-12-3925] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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90
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Toloşi L, Theißen J, Halachev K, Hero B, Berthold F, Lengauer T. A method for finding consensus breakpoints in the cancer genome from copy number data. ACTA ACUST UNITED AC 2013; 29:1793-800. [PMID: 23716195 DOI: 10.1093/bioinformatics/btt300] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
MOTIVATION Recurrent DNA breakpoints in cancer genomes indicate the presence of critical functional elements for tumor development. Identifying them can help determine new therapeutic targets. High-dimensional DNA microarray experiments like arrayCGH afford the identification of DNA copy number breakpoints with high precision, offering a solid basis for computational estimation of recurrent breakpoint locations. RESULTS We introduce a method for identification of recurrent breakpoints (consensus breakpoints) from copy number aberration datasets. The method is based on weighted kernel counting of breakpoints around genomic locations. Counts larger than expected by chance are considered significant. We show that the consensus breakpoints facilitate consensus segmentation of the samples. We apply our method to three arrayCGH datasets and show that by using consensus segmentation we achieve significant dimension reduction, which is useful for the task of prediction of tumor phenotype based on copy number data. We use our approach for classification of neuroblastoma tumors from different age groups and confirm the recent recommendation for the choice of age cut-off for differential treatment of 18 months. We also investigate the (epi)genetic properties at consensus breakpoint locations for seven datasets and show enrichment in overlap with important functional genomic regions. AVAILABILITY Implementation in R of our approach can be found at http://www.mpi-inf.mpg.de/ ∼laura/FeatureGrouping.html. CONTACT laura@mpi-inf.mpg.de. SUPPLEMENTARY INFORMATION Supplementary data are available at Bioinformatics online.
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Affiliation(s)
- Laura Toloşi
- Department of Computational Biology and Applied Algorithmics, Max-Planck-Institute for Informatics, Campus E1.4, 66123 Saarbrücken, Germany
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91
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Iwakawa R, Takenaka M, Kohno T, Shimada Y, Totoki Y, Shibata T, Tsuta K, Nishikawa R, Noguchi M, Sato-Otsubo A, Ogawa S, Yokota J. Genome-wide identification of genes with amplification and/or fusion in small cell lung cancer. Genes Chromosomes Cancer 2013; 52:802-16. [PMID: 23716474 PMCID: PMC3806277 DOI: 10.1002/gcc.22076] [Citation(s) in RCA: 93] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2013] [Accepted: 04/25/2013] [Indexed: 02/04/2023] Open
Abstract
To obtain a landscape of gross genetic alterations in small cell lung cancer (SCLC), genome-wide copy number analysis and whole-transcriptome sequencing were performed in 58 and 42 SCLCs, respectively. Focal amplification of known oncogene loci, MYCL1 (1p34.2), MYCN (2p24.3), and MYC (8q24.21), was frequently and mutually exclusively detected. MYCL1 and MYC were co-amplified with other regions on either the same or the different chromosome in several cases. In addition, the 9p24.1 region was identified as being amplified in SCLCs without amplification of MYC family oncogenes. Notably, expression of the KIAA1432 gene in this region was significantly higher in KIAA1432 amplified cells than in non-amplified cells, and its mRNA expression showed strong correlations with the copy numbers. Thus, KIAA1432 is a novel gene activated by amplification in SCLCs. By whole-transcriptome sequencing, a total of 60 fusion transcripts, transcribed from 95 different genes, were identified as being expressed in SCLC cells. However, no in-frame fusion transcripts were recurrently detected in ≥2 SCLCs, and genes in the amplified regions, such as PVT1 neighboring MYC and RLF in MYCL1 amplicons, were recurrently fused with genes in the same amplicons or with those in different amplicons on either the same or different chromosome. Thus, it was indicated that amplification and fusion of several genes on chromosomes 1 and 8 occur simultaneously but not sequentially through chromothripsis in the development of SCLC, and amplification rather than fusion of genes plays an important role in its development.
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Affiliation(s)
- Reika Iwakawa
- Division of Multistep Carcinogenesis, National Cancer Center Research Institute, Tokyo 104-0045, Japan
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92
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The HER2 amplicon in breast cancer: Topoisomerase IIA and beyond. Biochim Biophys Acta Rev Cancer 2013; 1836:146-57. [PMID: 23628726 DOI: 10.1016/j.bbcan.2013.04.004] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2012] [Revised: 04/17/2013] [Accepted: 04/19/2013] [Indexed: 12/20/2022]
Abstract
HER2 gene amplification is observed in about 15% of breast cancers. The subgroup of HER2-positive breast cancers appears to be heterogeneous and presents complex patterns of gene amplification at the locus on chromosome 17q12-21. The molecular variations within the chromosome 17q amplicon and their clinical implications remain largely unknown. Besides the well-known TOP2A gene encoding Topoisomerase IIA, other genes might also be amplified and could play functional roles in breast cancer development and progression. This review will focus on the current knowledge concerning the HER2 amplicon heterogeneity, its clinical and biological impact and the pitfalls associated with the evaluation of gene amplifications at this locus, with particular attention to TOP2A and the link between TOP2A and anthracycline benefit. In addition it will discuss the clinical and biological implications of the amplification of ten other genes at this locus (MED1, STARD3, GRB7, THRA, RARA, IGFPB4, CCR7, KRT20, KRT19 and GAST) in breast cancer.
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93
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Woodward WA, Krishnamurthy S, Yamauchi H, El-Zein R, Ogura D, Kitadai E, Niwa SI, Cristofanilli M, Vermeulen P, Dirix L, Viens P, van Laere S, Bertucci F, Reuben JM, Ueno NT. Genomic and expression analysis of microdissected inflammatory breast cancer. Breast Cancer Res Treat 2013; 138:761-72. [PMID: 23568481 DOI: 10.1007/s10549-013-2501-6] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2012] [Accepted: 03/23/2013] [Indexed: 12/01/2022]
Abstract
Inflammatory breast cancer (IBC) is a unique clinical entity characterized by rapid onset of erythema and swelling of the breast often without an obvious breast mass. Many studies have examined and compared gene expression between IBC and non-IBC (nIBC), repeatedly finding clusters associated with receptor subtype, but no consistent gene signature associated with IBC has been validated. Here we compared microdissected IBC tumor cells to microdissected nIBC tumor cells matched based on estrogen and HER-2/neu receptor status. Gene expression analysis and comparative genomic hybridization were performed. An IBC gene set and genomic set were identified using a training set and validated on the remaining data. The IBC gene set was further tested using data from IBC consortium samples and publicly available data. Receptor driven clusters were identified in IBC; however, no IBC-specific gene signature was identified. Fifteen genes were correlated between increased genomic copy number and gene overexpression data. An expression-guided gene set upregulated in the IBC training set clustered the validation set into two clusters independent of receptor subtype but segregated only 75 % of samples in each group into IBC or nIBC. In a larger consortium cohort and in published data, the gene set failed to optimally enrich for IBC samples. However, this gene set had a high negative predictive value for excluding the diagnosis of IBC in publicly available data (100 %). An IBC enriched genomic data set accurately identified 10/16 cases in the validation data set. Even with microdissection, no IBC-specific gene signature distinguishes IBC from nIBC. Using microdissected data, a validated gene set was identified that is associated with IBC tumor cells. Inflammatory breast cancer comparative genomic hybridization data are presented, but a validated genomic data set that identifies IBC is not demonstrated.
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Affiliation(s)
- Wendy A Woodward
- Departments of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
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94
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Bravatà V, Cammarata FP, Forte GI, Minafra L. "Omics" of HER2-positive breast cancer. OMICS-A JOURNAL OF INTEGRATIVE BIOLOGY 2013; 17:119-29. [PMID: 23421906 DOI: 10.1089/omi.2012.0099] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
HER2/neu amplification/overexpression is the only somatic mutation widely considered to be a marker of disease outcome and response to treatment in breast cancer. Pathologists have made large efforts to achieve accuracy in characterizing HER2/neu status. The introduction of transtuzumab contributed to development of additional measures to identify sensitive and resistant subclasses of HER2/neu-positive tumors. In this article, we describe the latest advances in HER2/neu status diagnostic assessment and the most relevant research emerging from "Omics" (genomics, epigenetics, transcriptomics, and proteomics) studies on HER2/neu-positive breast cancer. A large quantity of biomarkers from different studies highlighted HER2/neu-positive specific proliferation, cell cycle arrest, and apoptosis mechanisms, as well as immunological and metabolic behavior. Major driver genes of tumor progression have had a candidate status (GRB7, MYC, CCND1, EGFR, etc.), even though the main role for HER2/neu is largely recognized. Nonetheless, existing omics data and HER2/neu-positive molecular profiles seem to suggest that few proteogenomic alterations in HER2, EGFR, and PI3K networks could significantly affect the effectiveness of transtuzumab. The systematic search of molecular alterations in and across these pathways can help to select the most appropriate drug for a given patient based on in-depth understanding of complexity in tumor biology.
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Affiliation(s)
- Valentina Bravatà
- Institute of Molecular Bioimaging and Physiology (IBFM), National Research Council (CNR), Cefalù Unit, Cefalù, Italy
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95
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Vincent-Chong VK, Anwar A, Karen-Ng LP, Cheong SC, Yang YH, Pradeep PJ, Rahman ZAA, Ismail SM, Zaini ZM, Prepageran N, Kallarakkal TG, Ramanathan A, Mohayadi NABM, Rosli NSBM, Mustafa WMW, Abraham MT, Tay KK, Zain RB. Genome wide analysis of chromosomal alterations in oral squamous cell carcinomas revealed over expression of MGAM and ADAM9. PLoS One 2013; 8:e54705. [PMID: 23405089 PMCID: PMC3566089 DOI: 10.1371/journal.pone.0054705] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2012] [Accepted: 12/14/2012] [Indexed: 12/26/2022] Open
Abstract
Despite the advances in diagnosis and treatment of oral squamous cell carcinoma (OSCC), mortality and morbidity rates have not improved over the past decade. A major drawback in diagnosis and treatment of OSCC is the lack of knowledge relating to how genetic instability in oral cancer genomes affects oral carcinogenesis. Hence, the key aim of this study was to identify copy number alterations (CNAs) that may be cancer associated in OSCC using high-resolution array comparative genomic hybridization (aCGH). To our knowledge this is the first study to use ultra-high density aCGH microarrays to profile a large number of OSCC genomes (n = 46). The most frequently amplified CNAs were located on chromosome 11q11(52%), 2p22.3(52%), 1q21.3-q22(54%), 6p21.32(59%), 20p13(61%), 7q34(52% and 72%),8p11.23-p11.22(80%), 8q11.1-q24.4(54%), 9q13-q34.3(54%), 11q23.3-q25(57%); 14q21.3-q31.1(54%); 14q31.3-q32.33(57%), 20p13-p12.3(54%) and 20q11.21-q13.33(52%). The most frequently deleted chromosome region was located on 3q26.1 (54%). In order to verify the CNAs from aCGH using quantitative polymerase chain reaction (qPCR), the three top most amplified regions and their associated genes, namely ADAM5P (8p11.23-p11.22), MGAM (7q34) and SIRPB1 (20p13.1), were selected in this study. The ADAM5P locus was found to be amplified in 39 samples and deleted in one; MGAM (24 amplifications and 3 deletions); and SIRPB1 (12 amplifications, others undetermined). On the basis of putative cancer-related annotations, two genes, namely ADAM metallopeptidase domain 9 (ADAM9) and maltase-glucoamylase alpha-glucosidase (MGAM), that mapped to CNA regions were selected for further evaluation of their mRNA expression using reverse transcriptase qPCR. The over-expression of MGAM was confirmed with a 6.6 fold increase in expression at the mRNA level whereas the fold change in ADAM9 demonstrated a 1.6 fold increase. This study has identified significant regions in the OSCC genome that were amplified and resulted in consequent over-expression of the MGAM and ADAM9 genes that may be utilized as biological markers for OSCC.
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Affiliation(s)
- Vui King Vincent-Chong
- Oral Cancer Research and Coordinating Centre, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia
| | - Arif Anwar
- Sengenics Sdn Bhd, Petaling Jaya, Selangor Darul Ehsan, Malaysia
| | - Lee Peng Karen-Ng
- Oral Cancer Research and Coordinating Centre, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia
| | - Sok Ching Cheong
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia
- Oral Cancer Research Team, Cancer Research Initiatives Foundation, Selangor Darul Ehsan, Malaysia
| | - Yi-Hsin Yang
- Department of Dental Hygiene, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Padmaja Jayaprasad Pradeep
- Oral Cancer Research and Coordinating Centre, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia
| | - Zainal Ariff Abdul Rahman
- Oral Cancer Research and Coordinating Centre, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia
| | - Siti Mazlipah Ismail
- Oral Cancer Research and Coordinating Centre, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia
| | - Zuraiza Mohamad Zaini
- Oral Cancer Research and Coordinating Centre, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia
- Department of Oral Pathology, Oral Medicine and Periodontology, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia
| | - Narayanan Prepageran
- Oral Cancer Research and Coordinating Centre, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia
- Department of Otorhinolaringology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Thomas George Kallarakkal
- Oral Cancer Research and Coordinating Centre, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia
- Department of Oral Pathology, Oral Medicine and Periodontology, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia
| | - Anand Ramanathan
- Oral Cancer Research and Coordinating Centre, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia
- Department of Oral Pathology, Oral Medicine and Periodontology, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia
| | | | | | | | | | - Keng Kiong Tay
- Oral Health Division, Ministry of Health, Putrajaya, Malaysia
| | - Rosnah Binti Zain
- Oral Cancer Research and Coordinating Centre, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia
- Department of Oral Pathology, Oral Medicine and Periodontology, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia
- * E-mail:
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96
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Shiu KK, Wetterskog D, Mackay A, Natrajan R, Lambros M, Sims D, Bajrami I, Brough R, Frankum J, Sharpe R, Marchio C, Horlings H, Reyal F, van der Vijver M, Turner N, Reis-Filho JS, Lord CJ, Ashworth A. Integrative molecular and functional profiling of ERBB2-amplified breast cancers identifies new genetic dependencies. Oncogene 2013; 33:619-31. [PMID: 23334330 DOI: 10.1038/onc.2012.625] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2012] [Revised: 11/04/2012] [Accepted: 11/14/2012] [Indexed: 12/30/2022]
Abstract
Overexpression of the receptor tyrosine kinase ERBB2 (also known as HER2) occurs in around 15% of breast cancers and is driven by amplification of the ERBB2 gene. ERBB2 amplification is a marker of poor prognosis, and although anti-ERBB2-targeted therapies have shown significant clinical benefit, de novo and acquired resistance remains an important problem. Genomic profiling has demonstrated that ERBB2+ve breast cancers are distinguished from ER+ve and 'triple-negative' breast cancers by harbouring not only the ERBB2 amplification on 17q12, but also a number of co-amplified genes on 17q12 and amplification events on other chromosomes. Some of these genes may have important roles in influencing clinical outcome, and could represent genetic dependencies in ERBB2+ve cancers and therefore potential therapeutic targets. Here, we describe an integrated genomic, gene expression and functional analysis to determine whether the genes present within amplicons are critical for the survival of ERBB2+ve breast tumour cells. We show that only a fraction of the ERBB2-amplified breast tumour lines are truly addicted to the ERBB2 oncogene at the mRNA level and display a heterogeneous set of additional genetic dependencies. These include an addiction to the transcription factor gene TFAP2C when it is amplified and overexpressed, suggesting that TFAP2C represents a genetic dependency in some ERBB2+ve breast cancer cells.
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Affiliation(s)
- K-K Shiu
- The Breakthrough Breast Cancer Research Centre, The Institute of Cancer Research, London, UK
| | - D Wetterskog
- The Breakthrough Breast Cancer Research Centre, The Institute of Cancer Research, London, UK
| | - A Mackay
- The Breakthrough Breast Cancer Research Centre, The Institute of Cancer Research, London, UK
| | - R Natrajan
- The Breakthrough Breast Cancer Research Centre, The Institute of Cancer Research, London, UK
| | - M Lambros
- The Breakthrough Breast Cancer Research Centre, The Institute of Cancer Research, London, UK
| | - D Sims
- The Breakthrough Breast Cancer Research Centre, The Institute of Cancer Research, London, UK
| | - I Bajrami
- The Breakthrough Breast Cancer Research Centre, The Institute of Cancer Research, London, UK
| | - R Brough
- The Breakthrough Breast Cancer Research Centre, The Institute of Cancer Research, London, UK
| | - J Frankum
- The Breakthrough Breast Cancer Research Centre, The Institute of Cancer Research, London, UK
| | - R Sharpe
- The Breakthrough Breast Cancer Research Centre, The Institute of Cancer Research, London, UK
| | - C Marchio
- Department of Biomedical Sciences and Human Oncology, University of Turin, Turin, Italy
| | - H Horlings
- Department of Pathology, Academic Medical Centre, Amsterdam, The Netherlands
| | - F Reyal
- Department of Pathology, Academic Medical Centre, Amsterdam, The Netherlands
| | - M van der Vijver
- Department of Pathology, Academic Medical Centre, Amsterdam, The Netherlands
| | - N Turner
- The Breakthrough Breast Cancer Research Centre, The Institute of Cancer Research, London, UK
| | - J S Reis-Filho
- The Breakthrough Breast Cancer Research Centre, The Institute of Cancer Research, London, UK
| | - C J Lord
- The Breakthrough Breast Cancer Research Centre, The Institute of Cancer Research, London, UK
| | - A Ashworth
- The Breakthrough Breast Cancer Research Centre, The Institute of Cancer Research, London, UK
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97
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Abstract
Over the last decade, our knowledge in somatic genetic events related to breast cancer has increased -enormously. Through usage of various genome-wide molecular approaches, it has become increasingly clear that breast cancer is a vastly heterogeneous disease. Microarray-based gene expression profiling has divided breast cancer into five distinct intrinsic subtypes termed basal-like, HER2-enriched, normal-like, luminal A, and luminal B. Importantly, these subtypes are closely correlated to clinical variables as well as different outcomes, with luminal A tumors as the good prognostic group. Initial studies using genome-wide DNA copy number data broadly partitioned breast cancers into three types, complex, amplifier, and simple, and moreover associated distinct copy number changes with the intrinsic subtypes defined by gene expression profiles. More recently, this genomic classification was refined into six genomic subtypes demonstrating strong resemblance to the intrinsic gene expression classification. Additionally, inherited BRCA1- and BRCA2-mutated tumors were significantly correlated to specific subtypes. In this chapter, we will review the current status regarding genomic subtypes of nonfamilial breast cancer.
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Affiliation(s)
- Markus Ringnér
- Department of Oncology, Clinical Sciences, Lund University, Lund, Sweden
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98
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Liu S, Im H, Bairoch A, Cristofanilli M, Chen R, Deutsch EW, Dalton S, Fenyo D, Fanayan S, Gates C, Gaudet P, Hincapie M, Hanash S, Kim H, Jeong SK, Lundberg E, Mias G, Menon R, Mu Z, Nice E, Paik YK, Uhlen M, Wells L, Wu SL, Yan F, Zhang F, Zhang Y, Snyder M, Omenn GS, Beavis RC, Hancock WS. A chromosome-centric human proteome project (C-HPP) to characterize the sets of proteins encoded in chromosome 17. J Proteome Res 2012; 12:45-57. [PMID: 23259914 DOI: 10.1021/pr300985j] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report progress assembling the parts list for chromosome 17 and illustrate the various processes that we have developed to integrate available data from diverse genomic and proteomic knowledge bases. As primary resources, we have used GPMDB, neXtProt, PeptideAtlas, Human Protein Atlas (HPA), and GeneCards. All sites share the common resource of Ensembl for the genome modeling information. We have defined the chromosome 17 parts list with the following information: 1169 protein-coding genes, the numbers of proteins confidently identified by various experimental approaches as documented in GPMDB, neXtProt, PeptideAtlas, and HPA, examples of typical data sets obtained by RNASeq and proteomic studies of epithelial derived tumor cell lines (disease proteome) and a normal proteome (peripheral mononuclear cells), reported evidence of post-translational modifications, and examples of alternative splice variants (ASVs). We have constructed a list of the 59 "missing" proteins as well as 201 proteins that have inconclusive mass spectrometric (MS) identifications. In this report we have defined a process to establish a baseline for the incorporation of new evidence on protein identification and characterization as well as related information from transcriptome analyses. This initial list of "missing" proteins that will guide the selection of appropriate samples for discovery studies as well as antibody reagents. Also we have illustrated the significant diversity of protein variants (including post-translational modifications, PTMs) using regions on chromosome 17 that contain important oncogenes. We emphasize the need for mandated deposition of proteomics data in public databases, the further development of improved PTM, ASV, and single nucleotide variant (SNV) databases, and the construction of Web sites that can integrate and regularly update such information. In addition, we describe the distribution of both clustered and scattered sets of protein families on the chromosome. Since chromosome 17 is rich in cancer-associated genes, we have focused the clustering of cancer-associated genes in such genomic regions and have used the ERBB2 amplicon as an example of the value of a proteogenomic approach in which one integrates transcriptomic with proteomic information and captures evidence of coexpression through coordinated regulation.
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Affiliation(s)
- Suli Liu
- Barnett Institute and Department of Chemistry and Chemical Biology, Northeastern University, Boston, Massachusetts 02115, United States
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99
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Marotta M, Chen X, Inoshita A, Stephens R, Budd GT, Crowe JP, Lyons J, Kondratova A, Tubbs R, Tanaka H. A common copy-number breakpoint of ERBB2 amplification in breast cancer colocalizes with a complex block of segmental duplications. Breast Cancer Res 2012. [PMID: 23181561 PMCID: PMC4053137 DOI: 10.1186/bcr3362] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Introduction Segmental duplications (low-copy repeats) are the recently duplicated genomic segments in the human genome that display nearly identical (> 90%) sequences and account for about 5% of euchromatic regions. In germline, duplicated segments mediate nonallelic homologous recombination and thus cause both non-disease-causing copy-number variants and genomic disorders. To what extent duplicated segments play a role in somatic DNA rearrangements in cancer remains elusive. Duplicated segments often cluster and form genomic blocks enriched with both direct and inverted repeats (complex genomic regions). Such complex regions could be fragile and play a mechanistic role in the amplification of the ERBB2 gene in breast tumors, because repeated sequences are known to initiate gene amplification in model systems. Methods We conducted polymerase chain reaction (PCR)-based assays for primary breast tumors and analyzed publically available array-comparative genomic hybridization data to map a common copy-number breakpoint in ERBB2-amplified primary breast tumors. We further used molecular, bioinformatics, and population-genetics approaches to define duplication contents, structural variants, and haplotypes within the common breakpoint. Results We found a large (> 300-kb) block of duplicated segments that was colocalized with a common-copy number breakpoint for ERBB2 amplification. The breakpoint that potentially initiated ERBB2 amplification localized in a region 1.5 megabases (Mb) on the telomeric side of ERBB2. The region is very complex, with extensive duplications of KRTAP genes, structural variants, and, as a result, a paucity of single-nucleotide polymorphism (SNP) markers. Duplicated segments are varied in size and degree of sequence homology, indicating that duplications have occurred recurrently during genome evolution. Conclusions Amplification of the ERBB2 gene in breast tumors is potentially initiated by a complex region that has unusual genomic features and thus requires rigorous, labor-intensive investigation. The haplotypes we provide could be useful to identify the potential association between the complex region and ERBB2 amplification.
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100
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Masferrer E, Ferrándiz-Pulido C, Lloveras B, Masferrer-Niubò M, Espinet B, Salido M, Rodríguez-Rivera M, Alemany L, Placer J, Gelabert A, Servitje O, García-Patos V, Pujol RM, Toll A. MYCCopy Number Gains are Associated with Poor Outcome in Penile Squamous Cell Carcinoma. J Urol 2012; 188:1965-71. [DOI: 10.1016/j.juro.2012.07.003] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2012] [Indexed: 11/26/2022]
Affiliation(s)
- Emili Masferrer
- Servei de Dermatologia, Facultat de Medicina, Universitat de Barcelona, Hospital del Mar, Parc de Salut Mar, Institut Hospital del Mar d'Investigacions Mèdiques, Barcelona, Spain
- Universitat Autònoma de Barcelona, Barcelona, Spain
| | | | | | | | - Blanca Espinet
- Laboratori de Citogenètica Mollecular, Servei d′Anatomia Patològica, Barcelona, Spain
| | - Marta Salido
- Laboratori de Citogenètica Mollecular, Servei d′Anatomia Patològica, Barcelona, Spain
| | | | - Laia Alemany
- Programa de Recerca en Epidemiologia del Càncer, Unitat d'Infeccions i Càncer, Institut Català d'Oncologia, Barcelona, Spain
- Institut d'Investigació Biomédica de Bellvitge, Consorcio de Investigación Biomédica de Epidemiologia i Salut Pública, Barcelona, Spain
| | - Jose Placer
- Servei d'Urologia, Hospital Universitari Vall d'Hebron, Barcelona, Spain
| | | | - Octavi Servitje
- Servei de Dermatologia, Hospital Universitari de Bellvitge, Barcelona, Spain
| | - Vicenç García-Patos
- Servei de Dermatologia, Facultat de Medicina, Universitat de Barcelona, Hospital del Mar, Parc de Salut Mar, Institut Hospital del Mar d'Investigacions Mèdiques, Barcelona, Spain
| | - Ramon M. Pujol
- Servei de Dermatologia, Hospital del Mar, Parc de Salut Mar, Institut Hospital del Mar d'Investigacions Mèdiques, Barcelona, Spain
| | - Agustí Toll
- Servei de Dermatologia, Hospital del Mar, Parc de Salut Mar, Institut Hospital del Mar d'Investigacions Mèdiques, Barcelona, Spain
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