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Jiang Y, Zhang H, Wang J, Chen J, Guo Z, Liu Y, Hua H. Exploiting RIG-I-like receptor pathway for cancer immunotherapy. J Hematol Oncol 2023; 16:8. [PMID: 36755342 PMCID: PMC9906624 DOI: 10.1186/s13045-023-01405-9] [Citation(s) in RCA: 30] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Accepted: 01/30/2023] [Indexed: 02/10/2023] Open
Abstract
RIG-I-like receptors (RLRs) are intracellular pattern recognition receptors that detect viral or bacterial infection and induce host innate immune responses. The RLRs family comprises retinoic acid-inducible gene 1 (RIG-I), melanoma differentiation-associated gene 5 (MDA5) and laboratory of genetics and physiology 2 (LGP2) that have distinctive features. These receptors not only recognize RNA intermediates from viruses and bacteria, but also interact with endogenous RNA such as the mislocalized mitochondrial RNA, the aberrantly reactivated repetitive or transposable elements in the human genome. Evasion of RLRs-mediated immune response may lead to sustained infection, defective host immunity and carcinogenesis. Therapeutic targeting RLRs may not only provoke anti-infection effects, but also induce anticancer immunity or sensitize "immune-cold" tumors to immune checkpoint blockade. In this review, we summarize the current knowledge of RLRs signaling and discuss the rationale for therapeutic targeting RLRs in cancer. We describe how RLRs can be activated by synthetic RNA, oncolytic viruses, viral mimicry and radio-chemotherapy, and how the RNA agonists of RLRs can be systemically delivered in vivo. The integration of RLRs agonism with RNA interference or CAR-T cells provides new dimensions that complement cancer immunotherapy. Moreover, we update the progress of recent clinical trials for cancer therapy involving RLRs activation and immune modulation. Further studies of the mechanisms underlying RLRs signaling will shed new light on the development of cancer therapeutics. Manipulation of RLRs signaling represents an opportunity for clinically relevant cancer therapy. Addressing the challenges in this field will help develop future generations of cancer immunotherapy.
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Affiliation(s)
- Yangfu Jiang
- Laboratory of Oncogene, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, 610041, China.
| | - Hongying Zhang
- Laboratory of Oncogene, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, 610041, China
| | - Jiao Wang
- School of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, 610075, China
| | - Jinzhu Chen
- Laboratory of Oncogene, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, 610041, China
| | - Zeyu Guo
- Laboratory of Oncogene, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, 610041, China
| | - Yongliang Liu
- Laboratory of Oncogene, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, 610041, China
| | - Hui Hua
- Laboratory of Stem Cell Biology, West China Hospital, Sichuan University, Chengdu, 610041, China.
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2
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Choi E, Mun GI, Lee J, Lee H, Cho J, Lee YS. BRCA1 deficiency in triple-negative breast cancer: Protein stability as a basis for therapy. Biomed Pharmacother 2023; 158:114090. [PMID: 36493696 DOI: 10.1016/j.biopha.2022.114090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 11/24/2022] [Accepted: 12/02/2022] [Indexed: 12/12/2022] Open
Abstract
Mutations in breast cancer-associated 1 (BRCA1) increase the lifetime risk of developing breast cancer by up to 51% over the risk of the general population. Many aspects of this multifunctional protein have been revealed, including its essential role in homologous recombination repair, E3 ubiquitin ligase activity, transcriptional regulation, and apoptosis. Although most studies have focused on BRCA1 deficiency due to mutations, only a minority of patients carry BRCA1 mutations. A recent study has suggested an expanded definition of BRCA1 deficiency with reduced BRCA1 levels, which accounts for almost half of all triple-negative breast cancer (TNBC) patients. Reduced BRCA1 levels can result from epigenetic modifications or increased proteasomal degradation. In this review, we discuss how this knowledge of BRCA1 function and regulation of BRCA1 protein stability can help overcome the challenges encountered in the clinic and advance current treatment strategies for BRCA1-related breast cancer patients, especially focusing on TNBC.
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Affiliation(s)
- Eun Choi
- Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Gil-Im Mun
- Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Joohyun Lee
- Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Hanhee Lee
- Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Jaeho Cho
- Department of Radiation Oncology, Yonsei University College of Medicine, Seoul 03722, Republic of Korea
| | - Yun-Sil Lee
- Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul 03760, Republic of Korea.
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3
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Kang J, Lee J, Lee A, Lee YS. Prediction of homologous recombination deficiency from cancer gene expression data. J Int Med Res 2022; 50:3000605221133655. [DOI: 10.1177/03000605221133655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Objective Homologous recombination deficiency (HRD) is the main mechanism of tumorigenesis in some cancers. HRD causes abnormal double-strand break repair, resulting in genomic scars. Some scoring HRD tests have been approved as companion diagnostics of polyadenosine diphosphate-ribose polymerase (PARP) inhibitor treatment. This study aimed to build an HRD prediction model using gene expression data from various cancer types. Methods The cancer genome atlas data were used for HRD prediction modeling. A total of 10,567 cases of 33 cancer types were included, and expression data from 5128 out of 20,502 genes were included as predictors. A penalized logistic regression model was chosen as a modeling technique. Results The area under the curve of the receiver operating characteristic curve of HRD status prediction was 0.98 for the training set and 0.93 for the test set. The accuracy of HRD status prediction was 0.93 for the training set and 0.88 for the test set. Conclusions Our study suggests that the HRD prediction model based on penalized logistic regression using gene expression data can be used to select patients for treatment with PARP inhibitors.
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Affiliation(s)
- Jun Kang
- Department of Hospital Pathology, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Jieun Lee
- Division of Medical Oncology, Department of Internal Medicine, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Ahwon Lee
- Department of Hospital Pathology, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
- Cancer Research Institute, The Catholic University of Korea, Seoul, Korea
| | - Youn Soo Lee
- Department of Hospital Pathology, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
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Beinse G, Just PA, Le Frere Belda MA, Laurent-Puig P, Jacques S, Koual M, Garinet S, Leroy K, Delanoy N, Blons H, Gervais C, Durdux C, Chapron C, Goldwasser F, Terris B, Badoual C, Taly V, Bats AS, Borghese B, Alexandre J. Discovery and validation of a transcriptional signature identifying homologous recombination-deficient breast, endometrial and ovarian cancers. Br J Cancer 2022; 127:1123-1132. [PMID: 35752712 DOI: 10.1038/s41416-022-01900-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 06/03/2022] [Accepted: 06/15/2022] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND Molecular alterations leading to homologous recombination deficiency (HRD) are heterogeneous. We aimed to identify a transcriptional profile shared by endometrial (UCEC), breast (BRCA) and ovarian (OV) cancers with HRD. METHODS Genes differentially expressed with HRD genomic score (continuous gHRD score) in UCEC/BRCA/OV were identified using edgeR, and used to train a RNAseq score (ridge-regression model) predictive of the gHRD score (PanCanAtlas, N = 1684 samples). The RNAseq score was applied in independent gynaecological datasets (CARPEM/CPTAC/SCAN/TCGA, N = 4038 samples). Validations used ROC curves, linear regressions and Pearson correlations. Overall survival (OS) analyses used Kaplan-Meier curves and Cox models. RESULTS In total, 656 genes were commonly up/downregulated with gHRD score in UCEC/BRCA/OV. Upregulated genes were enriched for nuclear/chromatin/DNA-repair processes, while downregulated genes for cytoskeleton (gene ontologies). The RNAseq score correlated with gHRD score in independent gynaecological cancers (R² = 0.4-0.7, Pearson correlation = 0.64-0.86, all P < 10-11), and was predictive of gHRD score >42 (RNAseq HRD profile; AUC = 0.95/0.92/0.78 in UCEC/BRCA/OV). RNAseq HRD profile was associated (i) with better OS in platinum-treated advanced TP53-mutated-UCEC (P < 0.001) and OV (P = 0.013), and (ii) with poorer OS (P < 0.001) and higher benefit of adjuvant chemotherapy in Stage I-III BRCA (interaction test, P < 0.001). CONCLUSIONS UCEC/BRCA/OV with HRD-associated genomic scars share a common transcriptional profile. RNAseq signatures might be relevant for identifying HRD-gynaecological cancers, for prognostication and for therapeutic decision.
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Affiliation(s)
- Guillaume Beinse
- Centre de Recherche des Cordeliers, « Equipe labélisée Ligue Contre le Cancer », CNRS SNC 5096, Sorbonne Université, Université de Paris Cité, INSERM, Paris, France.,Institut du Cancer Paris CARPEM, AP-HP, APHP.Centre, Department of Medical Oncology, Hopital Cochin, Paris, France
| | - Pierre-Alexandre Just
- Institut du Cancer Paris CARPEM, AP-HP, APHP.Centre, Department of Pathology, Hopital Cochin, Paris, France.,Université de Paris Cité, Paris, France
| | - Marie-Aude Le Frere Belda
- Institut du Cancer Paris CARPEM, AP-HP, APHP.Centre, Department of Pathology, Hopital Européen Georges Pompidou, Paris, France
| | - Pierre Laurent-Puig
- Centre de Recherche des Cordeliers, « Equipe labélisée Ligue Contre le Cancer », CNRS SNC 5096, Sorbonne Université, Université de Paris Cité, INSERM, Paris, France.,Université de Paris Cité, Paris, France.,Institut du Cancer Paris CARPEM, AP-HP, APHP.Centre, Department of Biology, Hopital Européen Georges Pompidou, Paris, France.,Institut du Cancer Paris CARPEM, AP-HP, APHP.Centre, Paris, France
| | | | - Meriem Koual
- Université de Paris Cité, Paris, France.,Institut du Cancer Paris CARPEM, AP-HP, APHP.Centre, Department of Gynecological Surgery, Hopital Européen Georges Pompidou, Paris, France
| | - Simon Garinet
- Centre de Recherche des Cordeliers, « Equipe labélisée Ligue Contre le Cancer », CNRS SNC 5096, Sorbonne Université, Université de Paris Cité, INSERM, Paris, France.,Université de Paris Cité, Paris, France.,Institut du Cancer Paris CARPEM, AP-HP, APHP.Centre, Department of Biology, Hopital Européen Georges Pompidou, Paris, France
| | - Karen Leroy
- Université de Paris Cité, Paris, France.,Institut du Cancer Paris CARPEM, AP-HP, APHP.Centre, Department of Biology, Hopital Européen Georges Pompidou, Paris, France
| | - Nicolas Delanoy
- Institut du Cancer Paris CARPEM, AP-HP, APHP.Centre, Department of Medical Oncology, Hopital Européen Georges Pompidou, Paris, France
| | - Helene Blons
- Université de Paris Cité, Paris, France.,Institut du Cancer Paris CARPEM, AP-HP, APHP.Centre, Department of Biology, Hopital Européen Georges Pompidou, Paris, France
| | - Claire Gervais
- Université de Paris Cité, Paris, France.,Institut du Cancer Paris CARPEM, AP-HP, APHP.Centre, Department of Medical Oncology, Hopital Européen Georges Pompidou, Paris, France
| | - Catherine Durdux
- Université de Paris Cité, Paris, France.,Institut du Cancer Paris CARPEM, AP-HP, APHP.Centre, Department of Radiotherapy, Hopital Européen Georges Pompidou, Paris, France
| | - Charles Chapron
- Université de Paris Cité, Paris, France.,Institut du Cancer Paris CARPEM, AP-HP, APHP.Centre, Department of Gynecological Surgery, Hopital Cochin, Paris, France
| | - François Goldwasser
- Institut du Cancer Paris CARPEM, AP-HP, APHP.Centre, Department of Medical Oncology, Hopital Cochin, Paris, France.,Université de Paris Cité, Paris, France
| | - Benoit Terris
- Institut du Cancer Paris CARPEM, AP-HP, APHP.Centre, Department of Pathology, Hopital Cochin, Paris, France.,Université de Paris Cité, Paris, France
| | - Cecile Badoual
- Université de Paris Cité, Paris, France.,Institut du Cancer Paris CARPEM, AP-HP, APHP.Centre, Department of Pathology, Hopital Européen Georges Pompidou, Paris, France
| | - Valerie Taly
- Centre de Recherche des Cordeliers, « Equipe labélisée Ligue Contre le Cancer », CNRS SNC 5096, Sorbonne Université, Université de Paris Cité, INSERM, Paris, France
| | - Anne-Sophie Bats
- Centre de Recherche des Cordeliers, « Equipe labélisée Ligue Contre le Cancer », CNRS SNC 5096, Sorbonne Université, Université de Paris Cité, INSERM, Paris, France.,Université de Paris Cité, Paris, France.,Institut du Cancer Paris CARPEM, AP-HP, APHP.Centre, Department of Gynecological Surgery, Hopital Européen Georges Pompidou, Paris, France
| | - Bruno Borghese
- Centre de Recherche des Cordeliers, « Equipe labélisée Ligue Contre le Cancer », CNRS SNC 5096, Sorbonne Université, Université de Paris Cité, INSERM, Paris, France.,Université de Paris Cité, Paris, France.,Institut du Cancer Paris CARPEM, AP-HP, APHP.Centre, Department of Gynecological Surgery, Hopital Cochin, Paris, France
| | - Jérôme Alexandre
- Centre de Recherche des Cordeliers, « Equipe labélisée Ligue Contre le Cancer », CNRS SNC 5096, Sorbonne Université, Université de Paris Cité, INSERM, Paris, France. .,Institut du Cancer Paris CARPEM, AP-HP, APHP.Centre, Department of Medical Oncology, Hopital Cochin, Paris, France. .,Université de Paris Cité, Paris, France.
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Toward More Comprehensive Homologous Recombination Deficiency Assays in Ovarian Cancer, Part 1: Technical Considerations. Cancers (Basel) 2022; 14:cancers14051132. [PMID: 35267439 PMCID: PMC8909526 DOI: 10.3390/cancers14051132] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 02/19/2022] [Accepted: 02/22/2022] [Indexed: 02/05/2023] Open
Abstract
Simple Summary High-grade serous ovarian cancer (HGSOC) is the most frequent and lethal form of ovarian cancer and is associated with homologous recombination deficiency (HRD) in 50% of cases. This specific alteration is associated with sensitivity to PARP inhibitors (PARPis). Despite vast prognostic improvements due to PARPis, current molecular assays assessing HRD status suffer from several limitations, and there is an urgent need for a more accurate evaluation. In these companion reviews (Part 1: Technical considerations; Part 2: Medical perspectives), we develop an integrative review to provide physicians and researchers involved in HGSOC management with a holistic perspective, from translational research to clinical applications. Abstract High-grade serous ovarian cancer (HGSOC), the most frequent and lethal form of ovarian cancer, exhibits homologous recombination deficiency (HRD) in 50% of cases. In addition to mutations in BRCA1 and BRCA2, which are the best known thus far, defects can also be caused by diverse alterations to homologous recombination-related genes or epigenetic patterns. HRD leads to genomic instability (genomic scars) and is associated with PARP inhibitor (PARPi) sensitivity. HRD is currently assessed through BRCA1/2 analysis, which produces a genomic instability score (GIS). However, despite substantial clinical achievements, FDA-approved companion diagnostics (CDx) based on GISs have important limitations. Indeed, despite the use of GIS in clinical practice, the relevance of such assays remains controversial. Although international guidelines include companion diagnostics as part of HGSOC frontline management, they also underscore the need for more powerful and alternative approaches for assessing patient eligibility to PARP inhibitors. In these companion reviews, we review and present evidence to date regarding HRD definitions, achievements and limitations in HGSOC. Part 1 is dedicated to technical considerations and proposed perspectives that could lead to a more comprehensive and dynamic assessment of HR, while Part 2 provides a more integrated approach for clinicians.
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Pawar A, Chowdhury OR, Chauhan R, Talole S, Bhattacharjee A. Identification of key gene signatures for the overall survival of ovarian cancer. J Ovarian Res 2022; 15:12. [PMID: 35057823 PMCID: PMC8780391 DOI: 10.1186/s13048-022-00942-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Accepted: 12/31/2021] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND The five-year overall survival (OS) of advanced-stage ovarian cancer remains nearly 25-35%, although several treatment strategies have evolved to get better outcomes. A considerable amount of heterogeneity and complexity has been seen in ovarian cancer. This study aimed to establish gene signatures that can be used in better prognosis through risk prediction outcome for the survival of ovarian cancer patients. Different studies' heterogeneity into a single platform is presented to explore the penetrating genes for poor or better survival. The integrative analysis of multiple data sets was done to determine the genes that influence poor or better survival. A total of 6 independent data sets was considered. The Cox Proportional Hazard model was used to obtain significant genes that had an impact on ovarian cancer patients. The gene signatures were prepared by splitting the over-expressed and under-expressed genes parallelly by the variable selection technique. The data visualisation techniques were prepared to predict the overall survival, and it could support the therapeutic regime. RESULTS We preferred to select 20 genes in each data set as upregulated and downregulated. Irrespective of the selection of multiple genes, not even a single gene was found common among data sets for the survival of ovarian cancer patients. However, the same analytical approach adopted. The chord plot was presented to make a comprehensive understanding of the outcome. CONCLUSIONS This study helps us to understand the results obtained from different studies. It shows the impact of the heterogeneity from one study to another. It shows the requirement of integrated studies to make a holistic view of the gene signature for ovarian cancer survival.
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Affiliation(s)
- Akash Pawar
- Section of Biostatistics, Center for Cancer Epidemiology, Tata Memorial Centre, Mumbai, India
| | - Oindrila Roy Chowdhury
- Section of Biostatistics, Center for Cancer Epidemiology, Tata Memorial Centre, Mumbai, India
| | - Ruby Chauhan
- Section of Biostatistics, Center for Cancer Epidemiology, Tata Memorial Centre, Mumbai, India
| | - Sanjay Talole
- Section of Biostatistics, Center for Cancer Epidemiology, Tata Memorial Centre, Mumbai, India
- Homi Bhabha National Institute, Mumbai, India
| | - Atanu Bhattacharjee
- Section of Biostatistics, Center for Cancer Epidemiology, Tata Memorial Centre, Mumbai, India.
- Homi Bhabha National Institute, Mumbai, India.
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Abstract
PURPOSE This article will briefly review the origins and evolution of functional genomics, first describing the experimental technology, and then some of the approaches applied to data analysis and visualization. It will emphasize application of functional genomics to radiation biology, using examples from the author's work to illustrate several key types of analysis. It concludes with a look at non-coding RNA, alternative reading of the genome, and single-cell transcriptomics, some of the innovative areas that may help to shape future research in radiation biology and oncology. CONCLUSIONS Transcriptomic approaches have provided insight into many areas of radiation biology and medicine, and innovations in technology and data analysis approaches promise continued contributions to radiation science in the future.
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Billaud A, Chevalier LM, Augereau P, Frenel JS, Passot C, Campone M, Morel A. Functional pre-therapeutic evaluation by genome editing of variants of uncertain significance of essential tumor suppressor genes. Genome Med 2021; 13:174. [PMID: 34749799 PMCID: PMC8576946 DOI: 10.1186/s13073-021-00976-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Accepted: 09/23/2021] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND Targeted therapies in oncology are promising but variants of uncertain significance (VUS) limit their use for clinical management and necessitate functional testing in vitro. Using BRCA1 and BRCA2 variants, which have consequences on PARP inhibitor sensitivity, and POLE variants, potential biomarkers of immunotherapy response, we developed a rapid functional assay based on CRISPR-Cas9 genome editing to determine the functional consequences of these variants having potentially direct implications on patients' access to targeted therapies. METHODS We first evaluated the functional impact of 26 BRCA1 and 7 BRCA2 variants by editing and comparing NGS results between the variant of interest and a silent control variant. Ten of these variants had already been classified as benign or pathogenic and were used as controls. Finally, we extended this method to the characterization of POLE VUS. RESULTS For the 23 variants that were unclassified or for which conflicting interpretations had been reported, 15 were classified as functionally normal and 6 as functionally abnormal. Another two variants were found to have intermediate consequences, both with potential impacts on splicing. We then compared these scores to the patients' responses to PARP inhibitors when possible. Finally, to prove the application of our method to the classification of variants from other tumor suppressor genes, we exemplified with three POLE VUS. Among them, two were classified with an intermediate functional impact and one was functionally abnormal. Eventually, four POLE variants previously classified in databases were also evaluated. However, we found evidence of a discordance with the classification, variant p.Leu424Val being found here functionally normal. CONCLUSIONS Our new rapid functional assay can be used to characterize the functional implication of BRCA1 and BRCA2 variants, giving patients whose variants were evaluated as functionally abnormal access to PARP inhibitor treatment. Retrospective analysis of patients' responses to PARP inhibitors, where accessible, was consistent with our functional score evaluation and confirmed the accuracy of our protocol. This method could potentially be extended to the classification of VUS from all essential tumor suppressor genes and can be performed within a timeframe compatible with clinical applications, thereby having a direct theranostic impact.
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Affiliation(s)
- Amandine Billaud
- Université d'Angers, Inserm, CRCINA, SFR ICAT, F-49000, Angers, France
- Institut de Cancérologie de l'Ouest Nantes-Angers, F-49000, Angers, France
| | - Louise-Marie Chevalier
- Université d'Angers, Inserm, CRCINA, SFR ICAT, F-49000, Angers, France
- Institut de Cancérologie de l'Ouest Nantes-Angers, F-49000, Angers, France
| | - Paule Augereau
- Institut de Cancérologie de l'Ouest Nantes-Angers, F-49000, Angers, France
| | - Jean-Sebastien Frenel
- Institut de Cancérologie de l'Ouest Nantes-Angers, F-49000, Angers, France
- Université de Nantes, Inserm, CRCINA, F-44000, Nantes, France
| | - Christophe Passot
- Institut de Cancérologie de l'Ouest Nantes-Angers, F-49000, Angers, France
| | - Mario Campone
- Institut de Cancérologie de l'Ouest Nantes-Angers, F-49000, Angers, France
- Université de Nantes, Inserm, CRCINA, F-44000, Nantes, France
| | - Alain Morel
- Université d'Angers, Inserm, CRCINA, SFR ICAT, F-49000, Angers, France.
- Institut de Cancérologie de l'Ouest Nantes-Angers, F-49000, Angers, France.
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Wong OGW, Li J, Cheung ANY. Targeting DNA Damage Response Pathway in Ovarian Clear Cell Carcinoma. Front Oncol 2021; 11:666815. [PMID: 34737943 PMCID: PMC8560708 DOI: 10.3389/fonc.2021.666815] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Accepted: 09/08/2021] [Indexed: 12/24/2022] Open
Abstract
Ovarian clear cell carcinoma (OCCC) is one of the major types of ovarian cancer and is of higher relative prevalence in Asians. It also shows higher possibility of resistance to cisplatin-based chemotherapy leading to poor prognosis. This may be attributed to the relative lack of mutations and aberrations in homologous recombination-associated genes, which are crucial in DNA damage response (DDR), such as BRCA1, BRCA2, p53, RAD51, and genes in the Fanconi anemia pathway. On the other hand, OCCC is characterized by a number of genetic defects rendering it vulnerable to DDR-targeting therapy, which is emerging as a potent treatment strategy for various cancer types. Mutations of ARID1A, PIK3CA, PTEN, and catenin beta 1 (CTNNB1), as well as overexpression of transcription factor hepatocyte nuclear factor-1β (HNF-1β), and microsatellite instability are common in OCCC. Of particular note is the loss-of-function mutations in ARID1A, which is found in approximately 50% of OCCC. ARID1A is crucial for processing of DNA double-strand break (DSB) and for sustaining DNA damage signaling, rendering ARID1A-deficient cells prone to impaired DNA damage checkpoint regulation and hence sensitive to poly ADP ribose polymerase (PARP) inhibitors. However, while preclinical studies have demonstrated the possibility to exploit DDR deficiency in OCCC for therapeutic purpose, progress in clinical application is lagging. In this review, we will recapitulate the preclinical studies supporting the potential of DDR targeting in OCCC treatment, with emphasis on the role of ARID1A in DDR. Companion diagnostic tests (CDx) for predicting susceptibility to PARP inhibitors are rapidly being developed for solid tumors including ovarian cancers and may readily be applicable on OCCC. The potential of various available DDR-targeting drugs for treating OCCC by drawing analogies with other solid tumors sharing similar genetic characteristics with OCCC will also be discussed.
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10
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Wiggins GAR, Black MA, Dunbier A, Morley-Bunker AE, Pearson JF, Walker LC. Increased gene expression variability in BRCA1-associated and basal-like breast tumours. Breast Cancer Res Treat 2021; 189:363-375. [PMID: 34287743 PMCID: PMC8357684 DOI: 10.1007/s10549-021-06328-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Accepted: 07/07/2021] [Indexed: 11/21/2022]
Abstract
Purpose Inherited variants in the cancer susceptibility genes, BRCA1 and BRCA2 account for up to 5% of breast cancers. Multiple gene expression studies have analysed gene expression patterns that maybe associated with BRCA12 pathogenic variant status; however, results from these studies lack consensus. These studies have focused on the differences in population means to identified genes associated with BRCA1/2-carriers with little consideration for gene expression variability, which is also under genetic control and is a feature of cellular function. Methods We measured differential gene expression variability in three of the largest familial breast cancer datasets and a 2116 breast cancer meta-cohort. Additionally, we used RNA in situ hybridisation to confirm expression variability of EN1 in an independent cohort of more than 500 breast tumours. Results BRCA1-associated breast tumours exhibited a 22.8% (95% CI 22.3–23.2) increase in transcriptome-wide gene expression variability compared to BRCAx tumours. Additionally, 40 genes were associated with BRCA1-related breast cancers that had ChIP-seq data suggestive of enriched EZH2 binding. Of these, two genes (EN1 and IGF2BP3) were significantly variable in both BRCA1-associated and basal-like breast tumours. RNA in situ analysis of EN1 supported a significant (p = 6.3 × 10−04) increase in expression variability in BRCA1-associated breast tumours. Conclusion Our novel results describe a state of increased gene expression variability in BRCA1-related and basal-like breast tumours. Furthermore, genes with increased variability may be driven by changes in DNA occupancy of epigenetic effectors. The variation in gene expression is replicable and led to the identification of novel associations between genes and disease phenotypes. Supplementary Information The online version contains supplementary material available at 10.1007/s10549-021-06328-y.
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Affiliation(s)
- George A R Wiggins
- Department of Pathology and Biomedical Science, University of Otago, Christchurch, New Zealand
| | - Michael A Black
- Department of Biochemistry, University of Otago, Dunedin, New Zealand
| | - Anita Dunbier
- Department of Biochemistry, University of Otago, Dunedin, New Zealand
| | - Arthur E Morley-Bunker
- Department of Pathology and Biomedical Science, University of Otago, Christchurch, New Zealand
| | | | - John F Pearson
- Department of Pathology and Biomedical Science, University of Otago, Christchurch, New Zealand.,Biostatistics and Computational Biology Unit, University of Otago, Christchurch, New Zealand
| | - Logan C Walker
- Department of Pathology and Biomedical Science, University of Otago, Christchurch, New Zealand.
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11
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Vriend J, Nachtigal MW. Ubiquitin Proteasome Pathway Transcriptome in Epithelial Ovarian Cancer. Cancers (Basel) 2021; 13:cancers13112659. [PMID: 34071321 PMCID: PMC8198060 DOI: 10.3390/cancers13112659] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2021] [Revised: 05/22/2021] [Accepted: 05/24/2021] [Indexed: 12/26/2022] Open
Abstract
In this article, we reviewed the transcription of genes coding for components of the ubiquitin proteasome pathway in publicly available datasets of epithelial ovarian cancer (EOC). KEGG analysis was used to identify the major pathways distinguishing EOC of low malignant potential (LMP) from invasive high-grade serous ovarian carcinomas (HGSOC), and to identify the components of the ubiquitin proteasome system that contributed to these pathways. We identified elevated transcription of several genes encoding ubiquitin conjugases associated with HGSOC. Fifty-eight genes coding for ubiquitin ligases and more than 100 genes encoding ubiquitin ligase adaptors that were differentially expressed between LMP and HGSOC were also identified. Many differentially expressed genes encoding E3 ligase adaptors were Cullin Ring Ligase (CRL) adaptors, and 64 of them belonged to the Cullin 4 DCX/DWD family of CRLs. The data suggest that CRLs play a role in HGSOC and that some of these proteins may be novel therapeutic targets. Differential expression of genes encoding deubiquitinases and proteasome subunits was also noted.
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Affiliation(s)
- Jerry Vriend
- Department of Human Anatomy and Cell Science, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB R3E 0J9, Canada
- Correspondence: ; Tel.: +1-204-789-3732
| | - Mark W. Nachtigal
- Department of Biochemistry and Medical Genetics, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB R3E 0J9, Canada;
- Department of Obstetrics, Gynecology & Reproductive Sciences, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB R3E 0J9, Canada
- CancerCare Manitoba Research Institute, Winnipeg, MB R3E 0V9, Canada
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12
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Arakelyan A, Melkonyan A, Hakobyan S, Boyarskih U, Simonyan A, Nersisyan L, Nikoghosyan M, Filipenko M, Binder H. Transcriptome Patterns of BRCA1- and BRCA2- Mutated Breast and Ovarian Cancers. Int J Mol Sci 2021; 22:1266. [PMID: 33525353 PMCID: PMC7865215 DOI: 10.3390/ijms22031266] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 01/06/2021] [Accepted: 01/07/2021] [Indexed: 02/06/2023] Open
Abstract
Mutations in the BRCA1 and BRCA2 genes are known risk factors and drivers of breast and ovarian cancers. So far, few studies have been focused on understanding the differences in transcriptome and functional landscapes associated with the disease (breast vs. ovarian cancers), gene (BRCA1 vs. BRCA2), and mutation type (germline vs. somatic). In this study, we were aimed at systemic evaluation of the association of BRCA1 and BRCA2 germline and somatic mutations with gene expression, disease clinical features, outcome, and treatment. We performed BRCA1/2 mutation centered RNA-seq data analysis of breast and ovarian cancers from the TCGA repository using transcriptome and phenotype "portrayal" with multi-layer self-organizing maps and functional annotation. The results revealed considerable differences in BRCA1- and BRCA2-dependent transcriptome landscapes in the studied cancers. Furthermore, our data indicated that somatic and germline mutations for both genes are characterized by deregulation of different biological functions and differential associations with phenotype characteristics and poly(ADP-ribose) polymerase (PARP)-inhibitor gene signatures. Overall, this study demonstrates considerable variation in transcriptomic landscapes of breast and ovarian cancers associated with the affected gene (BRCA1 vs. BRCA2), as well as the mutation type (somatic vs. germline). These results warrant further investigations with larger groups of mutation carriers aimed at refining the understanding of molecular mechanisms of breast and ovarian cancers.
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Affiliation(s)
- Arsen Arakelyan
- Group of Bioinformatics, Institute of Molecular Biology National Academy of Sciences of Armenia, 0014 Yerevan, Armenia; (S.H.); (A.S.); (L.N.); (M.N.)
- Institute of Biomedicine and Pharmacy, Russian-Armenian University, 0051 Yerevan, Armenia
| | - Ani Melkonyan
- Laboratory of Human Genomics and Immunomics, Institute of Molecular Biology National Academy of Sciences of Armenia, 0014 Yerevan, Armenia;
| | - Siras Hakobyan
- Group of Bioinformatics, Institute of Molecular Biology National Academy of Sciences of Armenia, 0014 Yerevan, Armenia; (S.H.); (A.S.); (L.N.); (M.N.)
| | - Uljana Boyarskih
- Institute of Chemical Biology and Fundamental Medicine, Siberian Branch of the Russian Academy of Sciences (SB RAS), 630090 Novosibirsk, Russia; (U.B.); (M.F.)
| | - Arman Simonyan
- Group of Bioinformatics, Institute of Molecular Biology National Academy of Sciences of Armenia, 0014 Yerevan, Armenia; (S.H.); (A.S.); (L.N.); (M.N.)
| | - Lilit Nersisyan
- Group of Bioinformatics, Institute of Molecular Biology National Academy of Sciences of Armenia, 0014 Yerevan, Armenia; (S.H.); (A.S.); (L.N.); (M.N.)
| | - Maria Nikoghosyan
- Group of Bioinformatics, Institute of Molecular Biology National Academy of Sciences of Armenia, 0014 Yerevan, Armenia; (S.H.); (A.S.); (L.N.); (M.N.)
- Institute of Biomedicine and Pharmacy, Russian-Armenian University, 0051 Yerevan, Armenia
| | - Maxim Filipenko
- Institute of Chemical Biology and Fundamental Medicine, Siberian Branch of the Russian Academy of Sciences (SB RAS), 630090 Novosibirsk, Russia; (U.B.); (M.F.)
| | - Hans Binder
- Interdisciplinary Centre for Bioinformatics, University of Leipzig, D-04107 Leipzig, Germany;
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13
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Kim O, Park EY, Kwon SY, Shin S, Emerson RE, Shin YH, DeMayo FJ, Lydon JP, Coffey DM, Hawkins SM, Quilliam LA, Cheon DJ, Fernández FM, Nephew KP, Karpf AR, Widschwendter M, Sood AK, Bast RC, Godwin AK, Miller KD, Cho CH, Kim J. Targeting progesterone signaling prevents metastatic ovarian cancer. Proc Natl Acad Sci U S A 2020; 117:31993-32004. [PMID: 33262282 PMCID: PMC7749341 DOI: 10.1073/pnas.2013595117] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Effective cancer prevention requires the discovery and intervention of a factor critical to cancer development. Here we show that ovarian progesterone is a crucial endogenous factor inducing the development of primary tumors progressing to metastatic ovarian cancer in a mouse model of high-grade serous carcinoma (HGSC), the most common and deadliest ovarian cancer type. Blocking progesterone signaling by the pharmacologic inhibitor mifepristone or by genetic deletion of the progesterone receptor (PR) effectively suppressed HGSC development and its peritoneal metastases. Strikingly, mifepristone treatment profoundly improved mouse survival (∼18 human years). Hence, targeting progesterone/PR signaling could offer an effective chemopreventive strategy, particularly in high-risk populations of women carrying a deleterious mutation in the BRCA gene.
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MESH Headings
- Adult
- Animals
- BRCA1 Protein/genetics
- Breast/pathology
- Breast Neoplasms/genetics
- Breast Neoplasms/pathology
- Breast Neoplasms/prevention & control
- Cystadenocarcinoma, Serous/chemistry
- Cystadenocarcinoma, Serous/genetics
- Cystadenocarcinoma, Serous/pathology
- Cystadenocarcinoma, Serous/prevention & control
- Disease Models, Animal
- Estradiol/administration & dosage
- Female
- Humans
- Mice
- Middle Aged
- Mifepristone/pharmacology
- Mifepristone/therapeutic use
- Mutation
- Neoplasms, Experimental/chemically induced
- Neoplasms, Experimental/genetics
- Neoplasms, Experimental/pathology
- Neoplasms, Experimental/prevention & control
- Ovarian Neoplasms/chemically induced
- Ovarian Neoplasms/genetics
- Ovarian Neoplasms/pathology
- Ovarian Neoplasms/prevention & control
- Ovary/pathology
- Ovary/surgery
- Progesterone/administration & dosage
- Progesterone/antagonists & inhibitors
- Progesterone/metabolism
- Receptors, Progesterone/genetics
- Receptors, Progesterone/metabolism
- Salpingo-oophorectomy
- Signal Transduction/drug effects
- Signal Transduction/genetics
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Affiliation(s)
- Olga Kim
- Department of Biochemistry and Molecular Biology, Indiana University Melvin and Bren Simon Comprehensive Cancer Center, Indiana University School of Medicine, Indianapolis, IN 46202
| | - Eun Young Park
- Department of Biochemistry and Molecular Biology, Indiana University Melvin and Bren Simon Comprehensive Cancer Center, Indiana University School of Medicine, Indianapolis, IN 46202
| | - Sun Young Kwon
- Department of Pathology, School of Medicine, Keimyung University, 41931 Daegu, Republic of Korea
| | - Sojin Shin
- Department of Obstetrics and Gynecology, School of Medicine, Keimyung University, 41931 Daegu, Republic of Korea
| | - Robert E Emerson
- Department of Pathology and Laboratory Medicine, Indiana University School of Medicine, Indianapolis, IN 46202
| | - Yong-Hyun Shin
- Department of Biochemistry and Molecular Biology, Indiana University Melvin and Bren Simon Comprehensive Cancer Center, Indiana University School of Medicine, Indianapolis, IN 46202
| | - Francesco J DeMayo
- Reproductive and Developmental Biology Laboratory, National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709
| | - John P Lydon
- Department of Molecular and Cell Biology, Baylor College of Medicine, Houston, TX 77030
| | - Donna M Coffey
- Department of Pathology and Genomic Medicine, Houston Methodist and Weill Cornell Medical College, Houston, TX 77030
| | - Shannon M Hawkins
- Department of Obstetrics and Gynecology, Indiana University Melvin and Bren Simon Comprehensive Cancer Center, Indiana University School of Medicine, Indianapolis, IN 46202
| | - Lawrence A Quilliam
- Department of Biochemistry and Molecular Biology, Indiana University Melvin and Bren Simon Comprehensive Cancer Center, Indiana University School of Medicine, Indianapolis, IN 46202
| | - Dong-Joo Cheon
- Department of Regenerative and Cancer Cell Biology, Albany Medical College, Albany, NY 12208
| | - Facundo M Fernández
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA 30332
| | - Kenneth P Nephew
- Medical Sciences Program, Indiana University School of Medicine, Bloomington, IN 47405
| | - Adam R Karpf
- Eppley Institute for Cancer Research, Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, NE 68198
| | - Martin Widschwendter
- Department of Women's Cancer, Institute for Women's Health, University College London, WC1E 6AU London, United Kingdom
- Research Institute for Biomedical Aging Research, Universität Innsbruck, 6020 Innsbruck, Austria
- European Translational Oncology Prevention and Screening (EUTOPS) Institute, Universität Innsbruck, 6060 Hall in Tirol, Austria
| | - Anil K Sood
- Department of Gynecologic Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030
- Department of Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX 77030
| | - Robert C Bast
- Department of Experimental Therapeutics, The University of Texas MD Anderson Cancer Center, Houston, TX 77030
| | - Andrew K Godwin
- Department of Pathology and Laboratory Medicine, University of Kansas Medical Center, Kansas City, KS 66160
| | - Kathy D Miller
- Department of Medicine, Indiana University Melvin and Bren Simon Comprehensive Cancer Center, Indiana University School of Medicine, Indianapolis, IN 46202
| | - Chi-Heum Cho
- Department of Obstetrics and Gynecology, School of Medicine, Keimyung University, 41931 Daegu, Republic of Korea;
| | - Jaeyeon Kim
- Department of Biochemistry and Molecular Biology, Indiana University Melvin and Bren Simon Comprehensive Cancer Center, Indiana University School of Medicine, Indianapolis, IN 46202;
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14
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Rojas AP, Vo DV, Mwangi L, Rehman S, Peiris AN. Oncologic manifestations of Klinefelter syndrome. Hormones (Athens) 2020; 19:497-504. [PMID: 33000452 DOI: 10.1007/s42000-020-00241-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2019] [Accepted: 09/01/2020] [Indexed: 10/23/2022]
Abstract
Klinefelter syndrome (47,XXY) has a prevalence of approximately 1 in 500 males. It is a condition characterized by an extra X chromosome and is an underdiagnosed clinical entity. Inactivation of genes enables their escape from regulatory mechanisms, which can result in such classic physical manifestations as hypogonadism, gynecomastia, infertility, and various hormonal and physical abnormalities. While the endocrine manifestations of 47,XXY are well-known, the oncologic manifestations have received less attention. An association between cancer and 47,XXY has not as yet been clearly defined, with variability noted in the prevalence of different malignancies in 47,XXY patients. The mechanisms underlying these altered oncologic risks are still under debate. Some of the proposed explanations include hormone imbalance, developmental malfunctions, and failed DNA repair mechanisms. However, the recognition of the oncological associations linked to 47,XXY could be helpful. Screening measures in certain malignancies may enable an earlier diagnosis of 47,XXY and the implementation of more customized care in 47,XXY and the mosaic variants.. The data for this review was compiled from relevant PubMed articles published within the last three decades and organized based on cancer type.
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Affiliation(s)
- Alexsandra P Rojas
- School of Medicine, Texas Tech University Health Sciences Center, Lubbock, TX, USA.
- , Lubbock, TX, USA.
| | - Diana V Vo
- School of Medicine, Texas Tech University Health Sciences Center, Lubbock, TX, USA
| | - Lance Mwangi
- School of Medicine, Texas Tech University Health Sciences Center, Lubbock, TX, USA
| | - Shabnam Rehman
- Oncology Division of Internal medicine, Texas Tech University Health Sciences Center, Lubbock, TX, USA
| | - Alan N Peiris
- Clinical Research Institute and Department of Internal Medicine, Texas Tech University Health Sciences Center, Lubbock, TX, USA
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15
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Genome-Wide Gene Expression Analyses of BRCA1- and BRCA2-Associated Breast and Ovarian Tumours. Cancers (Basel) 2020; 12:cancers12103015. [PMID: 33081408 PMCID: PMC7603076 DOI: 10.3390/cancers12103015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 09/28/2020] [Accepted: 10/14/2020] [Indexed: 12/13/2022] Open
Abstract
Germline pathogenic variants in BRCA1 and BRCA2 increase cumulative lifetime risk up to 75% for breast cancer and 76% for ovarian cancer. Genetic testing for BRCA1 and BRCA2 pathogenic variants has become an important part of clinical practice for cancer risk assessment and for reducing individual risk of developing cancer. Genetic testing can produce three outcomes: positive (a pathogenic variant), uninformative (no pathogenic variant) and uncertain significance (a variant of unknown clinical significance). More than one third of BRCA1 and BRCA2 variants identified have been classified as variants of uncertain significance, presenting a challenge for clinicians. To address this important clinical challenge, a number of studies have been undertaken to establish a gene expression phenotype for pathogenic BRCA1 and BRCA2 variant carriers in several diseased and normal tissues. However, the consistency of gene expression phenotypes described in studies has been poor. To determine if gene expression analysis has been a successful approach for variant classification, we describe the design and comparability of 23 published gene expression studies that have profiled cells from BRCA1 and BRCA2 pathogenic variant carriers. We show the impact of advancements in expression-based technologies, the importance of developing larger study cohorts and the necessity to better understand variables affecting gene expression profiles across different tissue types.
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16
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Hu ZY, Liu L, Xie N, Lu J, Liu Z, Tang Y, Wang Y, Yang J, Ouyang Q. Germline PALB2 Mutations in Cancers and Its Distinction From Somatic PALB2 Mutations in Breast Cancers. Front Genet 2020; 11:829. [PMID: 33193564 PMCID: PMC7482549 DOI: 10.3389/fgene.2020.00829] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Accepted: 07/09/2020] [Indexed: 12/27/2022] Open
Abstract
PALB2 is an important BRCAx candidate for familial breast cancers (FBC). PALB2 pathogenic variants (PVs) may not to conform to "two hit" paradigm. However, a recent study demonstrates that in the majority PALB2 germline mutant breast cancers, the loss of heterozygosity (LOH) and somatic point mutations are the "second hit." This study aimed to investigate the second hits in germline PALB2 mutations in breast cancers. We screened out 28 germline PALB2-mutation carriers among 480 familial cancer patients (including 143 FBC patients) in Geneplus database pool. Of the 143 patients with FBC, 10 had mono-allelic PALB2 germline mutations. All these germline PALB2 mutations were high-risk stop-gain, frameshift, or splicing mutations that concentrated in EX5-EX9 and might led to truncated proteins, severe functional defects and malignant phenotype. The hotspots were c.1057A[3 > 2] and c.3114-1G > A. Other mutations included c.389delA, c.2068C > T, c.2167_2168delAT, c.2629delT and c.2968G > T. Only one FBC patient has PALB2 somatic mutation and two patients had LOH of PALB2. All germline PALB2 mutations were high-risk mutations, whereas the somatic PALB2 mutations were moderate-risk missense mutations. We also distinguished PALB2 "novel mutations" from "reported mutations." In conclusion, germline PALB2 mutation should be put into the context of future screening.
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Affiliation(s)
- Zhe-Yu Hu
- Affiliated Cancer Hospital of Xiangya Medical School, Central South University/Hunan Cancer Hospital, Changsha, China.,Department of Breast Cancer Medical Oncology, Hunan Cancer Hospital, Changsha, China
| | - Liping Liu
- Affiliated Cancer Hospital of Xiangya Medical School, Central South University/Hunan Cancer Hospital, Changsha, China.,Department of Breast Cancer Medical Oncology, Hunan Cancer Hospital, Changsha, China
| | - Ning Xie
- Affiliated Cancer Hospital of Xiangya Medical School, Central South University/Hunan Cancer Hospital, Changsha, China.,Department of Breast Cancer Medical Oncology, Hunan Cancer Hospital, Changsha, China
| | - Jun Lu
- Affiliated Cancer Hospital of Xiangya Medical School, Central South University/Hunan Cancer Hospital, Changsha, China.,Department of Breast Cancer Medical Oncology, Hunan Cancer Hospital, Changsha, China
| | | | - Yu Tang
- Affiliated Cancer Hospital of Xiangya Medical School, Central South University/Hunan Cancer Hospital, Changsha, China.,Department of Breast Cancer Medical Oncology, Hunan Cancer Hospital, Changsha, China
| | - Yikai Wang
- Department of Biostatistics and Bioinformatics, Emory University Rollins School of Public Health, Atlanta, GA, United States
| | - Jianbo Yang
- Affiliated Cancer Hospital of Xiangya Medical School, Central South University/Hunan Cancer Hospital, Changsha, China.,Fujian Medical University Union Hospital, Fuzhou, China.,Department of Otolaryngology, Medical School, University of Minnesota, Minneapolis, MN, United States
| | - Quchang Ouyang
- Affiliated Cancer Hospital of Xiangya Medical School, Central South University/Hunan Cancer Hospital, Changsha, China.,Department of Breast Cancer Medical Oncology, Hunan Cancer Hospital, Changsha, China
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17
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Abstract
Long non-coding RNA (lncRNA) Xist has emerged as a key modulator in dosage compensation by randomly inactivating one of the X chromosomes in mammals during embryonic development. Dysregulation of X chromosome inactivation (XCI) due to deletion of Xist has been proven to induce hematologic cancer in mice. However, this phenomenon is not consistent in humans as growing evidence suggests Xist can suppress or promote cancer growth in different organs of the human body. In this review, we discuss recent advances of XCI in human embryonic stem cells and provide an explanation for the seemingly contradictory roles of Xist in development of human cancer.
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Affiliation(s)
- Yung-Kang Chen
- School of Medicine, Taipei Medical University, Taipei, Taiwan.,Department of General Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Yun Yen
- Graduate Institute of Medical Informatics, Taipei Medical University, Taipei, Taiwan. .,TMU Research Center of Cancer Translational Medicine, Taipei Medical University, 250 Wuxing Street, Taipei City, 110, Taiwan. .,Taipei Municipal Wanfang Hospital, Taipei Medical University, Taipei, Taiwan. .,Program for Cancer Molecular Biology and Drug Discovery, College of Medical Science and Technology, Taipei Medical University, Taipei, Taiwan.
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18
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Ovarian Cancer Dissemination-A Cell Biologist's Perspective. Cancers (Basel) 2019; 11:cancers11121957. [PMID: 31817625 PMCID: PMC6966436 DOI: 10.3390/cancers11121957] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Accepted: 12/04/2019] [Indexed: 12/16/2022] Open
Abstract
Epithelial ovarian cancer (EOC) comprises multiple disease states representing a variety of distinct tumors that, irrespective of tissue of origin, genetic aberrations and pathological features, share common patterns of dissemination to the peritoneal cavity. EOC peritoneal dissemination is a stepwise process that includes the formation of malignant outgrowths that detach and establish widespread peritoneal metastases through adhesion to serosal membranes. The cell biology associated with outgrowth formation, detachment, and de novo adhesion is at the nexus of diverse genetic backgrounds that characterize the disease. Development of treatment for metastatic disease will require detailed characterization of cellular processes involved in each step of EOC peritoneal dissemination. This article offers a review of the literature that relates to the current stage of knowledge about distinct steps of EOC peritoneal dissemination, with emphasis on the cell biology aspects of the process.
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19
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Hoppe MM, Sundar R, Tan DSP, Jeyasekharan AD. Biomarkers for Homologous Recombination Deficiency in Cancer. J Natl Cancer Inst 2019; 110:704-713. [PMID: 29788099 DOI: 10.1093/jnci/djy085] [Citation(s) in RCA: 208] [Impact Index Per Article: 41.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Accepted: 04/06/2018] [Indexed: 12/11/2022] Open
Abstract
Defective DNA repair is a common hallmark of cancer. Homologous recombination is a DNA repair pathway of clinical interest due to the sensitivity of homologous recombination-deficient cells to poly-ADP ribose polymerase (PARP) inhibitors. The measurement of homologous recombination deficiency (HRD) in cancer is therefore vital to the appropriate design of clinical trials incorporating PARP inhibitors. However, methods to identify HRD in tumors are varied and controversial. Understanding existing and new methods to measure HRD is important to their appropriate use in clinical trials and practice. The aim of this review is to summarize the biology and clinical validation of current methods to measure HRD, to aid decision-making for patient stratification and translational research in PARP inhibitor trials. We discuss the current clinical development of PARP inhibitors, along with established indicators for HRD such as germline BRCA1/2 mutation status and clinical response to platinum-based therapy. We then examine newer assays undergoing clinical validation, including 1) somatic mutations in homologous recombination genes, 2) "genomic scar" assays using array-based comparative genomic hybridization (aCGH), single nucleotide polymorphism (SNP) analysis or mutational signatures derived from next-generation sequencing, 3) transcriptional profiles of HRD, and 4) phenotypic or functional assays of protein expression and localization. We highlight the strengths and weaknesses of each of these assays, for consideration during the design of studies involving PARP inhibitors.
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Affiliation(s)
- Michal M Hoppe
- Cancer Science Institute of Singapore, National University Hospital, Singapore
| | - Raghav Sundar
- Department of Haematology-Oncology, National University Hospital, Singapore
| | - David S P Tan
- Cancer Science Institute of Singapore, National University Hospital, Singapore.,Department of Haematology-Oncology, National University Hospital, Singapore
| | - Anand D Jeyasekharan
- Cancer Science Institute of Singapore, National University Hospital, Singapore.,Department of Haematology-Oncology, National University Hospital, Singapore
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20
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Chen J, Haanpää MK, Gruber JJ, Jäger N, Ford JM, Snyder MP. High-Resolution Bisulfite-Sequencing of Peripheral Blood DNA Methylation in Early-Onset and Familial Risk Breast Cancer Patients. Clin Cancer Res 2019; 25:5301-5314. [PMID: 31175093 DOI: 10.1158/1078-0432.ccr-18-2423] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Revised: 04/11/2019] [Accepted: 06/05/2019] [Indexed: 12/14/2022]
Abstract
PURPOSE Understanding and explaining hereditary predisposition to cancer has focused on the genetic etiology of the disease. However, mutations in known genes associated with breast cancer, such as BRCA1 and BRCA2, account for less than 25% of familial cases of breast cancer. Recently, specific epigenetic modifications at BRCA1 have been shown to promote hereditary breast cancer, but the broader potential for epigenetic contribution to hereditary breast cancer is not yet well understood. EXPERIMENTAL DESIGN We examined DNA methylation through deep bisulfite sequencing of CpG islands and known promoter or regulatory regions in peripheral blood DNA from 99 patients with familial or early-onset breast or ovarian cancer, 6 unaffected BRCA mutation carriers, and 49 unaffected controls. RESULTS In 9% of patients, we observed altered methylation in the promoter regions of genes known to be involved in cancer, including hypermethylation at the tumor suppressor PTEN and hypomethylation at the proto-oncogene TEX14. These alterations occur in the form of allelic methylation that span up to hundreds of base pairs in length. CONCLUSIONS Our observations suggest a broader role for DNA methylation in early-onset, familial risk breast cancer. Further studies are warranted to clarify these mechanisms and the benefits of DNA methylation screening for early risk prediction of familial cancers.
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Affiliation(s)
- Justin Chen
- Department of Genetics, Stanford University, Stanford, California
| | - Maria K Haanpää
- Department of Medicine, Oncology Division, Stanford University, Stanford, California
| | - Joshua J Gruber
- Department of Genetics, Stanford University, Stanford, California.,Department of Medicine, Oncology Division, Stanford University, Stanford, California
| | - Natalie Jäger
- Department of Genetics, Stanford University, Stanford, California
| | - James M Ford
- Department of Genetics, Stanford University, Stanford, California. .,Department of Medicine, Oncology Division, Stanford University, Stanford, California
| | - Michael P Snyder
- Department of Genetics, Stanford University, Stanford, California.
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21
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Hollingsworth J, Lau A, Tone A, Kollara A, Allen L, Colgan TJ, Dube V, Rosen B, Murphy KJ, Greenblatt EM, Feigenberg T, Virtanen C, Brown TJ. BRCA1 Mutation Status and Follicular Fluid Exposure Alters NFκB Signaling and ISGylation in Human Fallopian Tube Epithelial Cells. Neoplasia 2018; 20:697-709. [PMID: 29852322 PMCID: PMC6030391 DOI: 10.1016/j.neo.2018.05.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Revised: 05/07/2018] [Accepted: 05/11/2018] [Indexed: 12/31/2022] Open
Abstract
Germline BRCA1 or BRCA2 mutations (mtBRCA1 and mtBRCA2) increase risk for high-grade serous ovarian cancer (HGSOC), the most commonly diagnosed epithelial ovarian cancer histotype. Other identified risk factors for this cancer, which originates primarily in the distal fallopian tube epithelium (FTE), implicate ovulation, during which the FTE cells become transiently exposed to follicular fluid (FF). To test whether mtBRCA1 or mtBRCA2 nonmalignant FTE cells respond differently to periovulatory FF exposure than control patient FTE cells, gene expression profiles from primary FTE cultures derived from BRCA1 or BRCA2 mutation carriers or control patients were compared at baseline, 24 hours after FF exposure, and 24 hours after FF replacement with culture medium. Hierarchical clustering revealed both FF exposure and BRCA mutation status affect gene expression, with BRCA1 mutation having the greatest impact. Gene set enrichment analysis revealed increased NFκB and EGFR signaling at baseline in mtBRCA1 samples, with increased interferon target gene expression, including members of the ISGylation pathway, observed after recovery from FF exposure. Gene set enrichment analysis did not identify altered pathway signaling in mtBRCA2 samples. An inverse relationship between EGFR signaling and ISGylation with BRCA1 protein levels was verified in an immortalized FTE cell line, OE-E6/E7, stably transfected with BRCA1 cDNA. Suppression of ISG15 and ISGylated protein levels by increased BRCA1 expression was found to be mediated by decreased NFκB signaling. These studies indicate that increased NFκB signaling associated with decreased BRCA1 expression results in increased ISG15 and protein ISGylation following FF exposure, which may be involved in predisposition to HGSOC.
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Affiliation(s)
- Julia Hollingsworth
- The Lunenfeld-Tanenbaum Research Institute of Mount Sinai Hospital, Toronto, ON; Institute of Medical Sciences, University of Toronto, Toronto, ON; Department of Obstetrics and Gynecology, University of Toronto, Toronto, ON
| | - Angela Lau
- The Lunenfeld-Tanenbaum Research Institute of Mount Sinai Hospital, Toronto, ON; Department of Obstetrics and Gynecology, University of Toronto, Toronto, ON; Department of Physiology, University of Toronto, Toronto, ON
| | - Alicia Tone
- Department of Obstetrics and Gynecology, University of Toronto, Toronto, ON; Division of Gynecologic Oncology, Princess Margaret Cancer Centre, Toronto, ON
| | - Alexandra Kollara
- The Lunenfeld-Tanenbaum Research Institute of Mount Sinai Hospital, Toronto, ON; Department of Obstetrics and Gynecology, University of Toronto, Toronto, ON
| | - Lisa Allen
- Department of Obstetrics and Gynecology, University of Toronto, Toronto, ON
| | - Terence J Colgan
- The Lunenfeld-Tanenbaum Research Institute of Mount Sinai Hospital, Toronto, ON; Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON; Pathology and Laboratory Medicine, Mount Sinai Hospital, Toronto, ON
| | - Valerie Dube
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON; Department of Pathology, Women's College Hospital, Toronto, ON
| | - Barry Rosen
- Department of Obstetrics and Gynecology, University of Toronto, Toronto, ON; Division of Gynecologic Oncology, Princess Margaret Cancer Centre, Toronto, ON
| | - K Joan Murphy
- Department of Obstetrics and Gynecology, University of Toronto, Toronto, ON; Division of Gynecologic Oncology, Princess Margaret Cancer Centre, Toronto, ON
| | - Ellen M Greenblatt
- The Lunenfeld-Tanenbaum Research Institute of Mount Sinai Hospital, Toronto, ON; Department of Obstetrics and Gynecology, University of Toronto, Toronto, ON
| | - Tomer Feigenberg
- Department of Obstetrics and Gynecology, University of Toronto, Toronto, ON; Division of Gynecologic Oncology, Princess Margaret Cancer Centre, Toronto, ON
| | | | - Theodore J Brown
- The Lunenfeld-Tanenbaum Research Institute of Mount Sinai Hospital, Toronto, ON; Institute of Medical Sciences, University of Toronto, Toronto, ON; Department of Obstetrics and Gynecology, University of Toronto, Toronto, ON; Department of Physiology, University of Toronto, Toronto, ON.
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22
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Clifford C, Vitkin N, Nersesian S, Reid-Schachter G, Francis JA, Koti M. Multi-omics in high-grade serous ovarian cancer: Biomarkers from genome to the immunome. Am J Reprod Immunol 2018; 80:e12975. [DOI: 10.1111/aji.12975] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Accepted: 04/16/2018] [Indexed: 12/16/2022] Open
Affiliation(s)
- Cole Clifford
- Department of Biomedical and Molecular Sciences; Queen's University; Kingston ON Canada
| | - Natasha Vitkin
- Department of Biomedical and Molecular Sciences; Queen's University; Kingston ON Canada
- Cancer Biology and Genetics; Queen's Cancer Research Institute; Queen's University; Kingston ON Canada
| | - Sarah Nersesian
- Department of Biomedical and Molecular Sciences; Queen's University; Kingston ON Canada
- Cancer Biology and Genetics; Queen's Cancer Research Institute; Queen's University; Kingston ON Canada
| | | | - Julie-Ann Francis
- Department of Obstetrics and Gynecology; Kingston Health Sciences Center; Queen's University; Kingston ON Canada
| | - Madhuri Koti
- Department of Biomedical and Molecular Sciences; Queen's University; Kingston ON Canada
- Cancer Biology and Genetics; Queen's Cancer Research Institute; Queen's University; Kingston ON Canada
- Department of Obstetrics and Gynecology; Kingston Health Sciences Center; Queen's University; Kingston ON Canada
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23
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Watanabe G, Chiba N, Nomizu T, Furuta A, Sato K, Miyashita M, Tada H, Suzuki A, Ohuchi N, Ishida T. Increased centrosome number in BRCA-related breast cancer specimens determined by immunofluorescence analysis. Cancer Sci 2018; 109:2027-2035. [PMID: 29601120 PMCID: PMC5989840 DOI: 10.1111/cas.13595] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2017] [Revised: 03/04/2018] [Accepted: 03/21/2018] [Indexed: 01/25/2023] Open
Abstract
BRCA‐related breast carcinoma can be prevented through prophylactic surgery and an intensive follow‐up regimen. However, BRCA genetic tests cannot be routinely performed, and some BRCA mutations could not be defined as deleterious mutations or normal variants. Therefore, an easy functional assay of BRCA will be useful to evaluate BRCA status. As it has been reported that BRCA functions in the regulation of centrosome number, we focused on centrosome number in cancer tissues. Here, 70 breast cancer specimens with known BRCA status were analyzed using immunofluorescence of γ‐tubulin (a marker of centrosome) foci. The number of foci per cell was higher in cases with BRCA mutation compared to wild‐type cases, that is, 1.9 (95% confidence interval [CI], 1.5‐2.3) vs 0.5 (95% CI, 0.2‐0.8) (P < .001). Specifically, foci numbers per cell in BRCA1 and BRCA2 mutation cases were 1.2 (95% CI, 0.6‐1.8) and 2.2 (95% CI, 1.7‐2.6), respectively, both higher than those in wild‐type cases (P = .042 and P < .0001, respectively). The predictive value of γ‐tubulin foci as determined by area under the curve (AUC = 0.86) for BRCA status was superior to BRCAPRO (AUC = 0.69), Myriad Table (AUC = 0.61), and KOHBRA BRCA risk calculator (AUC = 0.65) pretest values. The use of γ‐tubulin foci to predict BRCA status had sensitivity = 83% (19/23), specificity = 89% (42/47), and positive predictive value = 77% (20/26). Thus, γ‐tubulin immunofluorescence, a functional assessment of BRCA, can be used as a new prospective test of BRCA status.
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Affiliation(s)
- Gou Watanabe
- Division of Surgical Oncology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Natsuko Chiba
- Department of Cancer Biology, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan
| | - Tadashi Nomizu
- Department of Surgery, Hoshi General Hospital, Fukushima, Japan
| | - Akihiko Furuta
- Department of Breast Surgery, Ishinomaki Red Cross Hospital, Ishinomaki, Japan
| | - Kaolu Sato
- Department of Breast Surgery, Ishinomaki Red Cross Hospital, Ishinomaki, Japan
| | - Minoru Miyashita
- Division of Surgical Oncology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Hiroshi Tada
- Division of Surgical Oncology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Akihiko Suzuki
- Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Noriaki Ohuchi
- Division of Surgical Oncology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Takanori Ishida
- Division of Surgical Oncology, Tohoku University Graduate School of Medicine, Sendai, Japan
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24
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Ghosh R, Roy S, Franco S. PARP1 depletion induces RIG-I-dependent signaling in human cancer cells. PLoS One 2018; 13:e0194611. [PMID: 29590171 PMCID: PMC5874037 DOI: 10.1371/journal.pone.0194611] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Accepted: 03/06/2018] [Indexed: 12/11/2022] Open
Abstract
DNA Damage Response (DDR) and DNA repair pathways are emerging as potent, ubiquitous suppressors of innate immune signaling in human cells. Here, we show that human cells surviving depletion of the Single Strand Break (SSB) repair protein PARP1 undergo p21-dependent senescence or cell cycle checkpoint activation in the context of activation of innate immune signaling, or viral mimicry. Specifically, we observe induction of a large number of interferon-stimulated genes (ISGs) and multiple pattern recognition receptors (PRRs; including RIG-I, MDA-5, MAVS, TLR3 and STING) and increased nuclear IRF3 staining. Mechanistically, depletion of the double-stranded RNA (dsRNA) helicase RIG-I or its downstream effector MAVS specifically rescues ISG induction in PARP1-depleted cells, suggesting that the RIG-I/MAVS pathway is required for sustained ISG expression in this context. Experiments with conditioned media or a neutralizing antibody to the α/β-IFN receptor revealed that persistent ISG expression additionally requires an autocrine/paracrine loop. Finally, loss of PARP1 and radiation-induced DNA damage strongly synergize in the induction of p21 and ISGs. Overall, these findings increase our understanding of how PARP1 may suppress deleterious phenotypes associated to aging, inflammation and cancer in humans.
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Affiliation(s)
- Rajib Ghosh
- Department of Radiation Oncology and Molecular Radiation Sciences, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, United States of America
| | - Sanchita Roy
- Department of Radiation Oncology and Molecular Radiation Sciences, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, United States of America
| | - Sonia Franco
- Department of Radiation Oncology and Molecular Radiation Sciences, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, United States of America
- * E-mail:
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25
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Alteration of Epigenetic Regulation by Long Noncoding RNAs in Cancer. Int J Mol Sci 2018; 19:ijms19020570. [PMID: 29443889 PMCID: PMC5855792 DOI: 10.3390/ijms19020570] [Citation(s) in RCA: 112] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Revised: 02/13/2018] [Accepted: 02/13/2018] [Indexed: 02/06/2023] Open
Abstract
Long noncoding RNAs (lncRNAs) are important regulators of the epigenetic status of the human genome. Besides their participation to normal physiology, lncRNA expression and function have been already associated to many diseases, including cancer. By interacting with epigenetic regulators and by controlling chromatin topology, their misregulation may result in an aberrant regulation of gene expression that may contribute to tumorigenesis. Here, we review the functional role and mechanisms of action of lncRNAs implicated in the aberrant epigenetic regulation that has characterized cancer development and progression.
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26
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Computational Investigation of Homologous Recombination DNA Repair Deficiency in Sporadic Breast Cancer. Sci Rep 2017; 7:15742. [PMID: 29146938 PMCID: PMC5691048 DOI: 10.1038/s41598-017-16138-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Accepted: 11/03/2017] [Indexed: 12/17/2022] Open
Abstract
BRCAness has important implications in the management and treatment of patients with breast and ovarian cancer. In this study, we propose a computational framework to measure the BRCAness of breast and ovarian tumor samples based on their gene expression profiles. We define a characteristic profile for BRCAness by comparing gene expression differences between BRCA1/2 mutant familial tumors and sporadic breast cancer tumors while adjusting for relevant clinical factors. With this BRCAness profile, our framework calculates sample-specific BRCA scores, which indicates homologous recombination (HR)-mediated DNA repair pathway activity of samples. We found that in sporadic breast cancer high BRCAness score is associated with aberrant copy number of HR genes rather than somatic mutation and other genomic features. Moreover, we observed significant correlations of BRCA score with genome instability and neoadjuvant chemotherapy. More importantly, BRCA score provides significant prognostic value in both breast and ovarian cancers after considering established clinical variables. In summary, the inferred BRCAness from our framework can be used as a robust biomarker for the prediction of prognosis and treatment response in breast and ovarian cancers.
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27
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Talens F, Jalving M, Gietema JA, Van Vugt MA. Therapeutic targeting and patient selection for cancers with homologous recombination defects. Expert Opin Drug Discov 2017; 12:565-581. [PMID: 28425306 DOI: 10.1080/17460441.2017.1322061] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
INTRODUCTION DNA double-strand breaks (DSBs) are toxic DNA lesions that can be repaired by non-homologous end-joining (NHEJ) or homologous recombination (HR). Mutations in HR genes elicit a predisposition to cancer; yet, they also result in increased sensitivity to certain DNA damaging agents and poly (ADP-ribose) polymerase (PARP) inhibitors. To optimally implement PARP inhibitor treatment, it is important that patients with HR-deficient tumors are adequately selected. Areas covered: Herein, the authors describe the HR pathway mechanistically and review the treatment of HR-deficient cancers, with a specific focus on PARP inhibition for BRCA1/2-mutated breast and ovarian cancer. In addition, mechanisms of acquired PARP inhibitor resistance are discussed. Furthermore, combination therapies with PARP inhibitors are reviewed, in the context of both HR-deficient and HR-proficient tumors and methods for proper patient selection are also discussed. Expert opinion: Currently, only patients with germline or somatic BRCA1/2 mutations are eligible for PARP inhibitor treatment and only a proportion of patients respond. Patients with HR-deficient tumors caused by other (epi)genetic events may also benefit from PARP inhibitor treatment. Ideally, selection of eligible patients for PARP inhibitor treatment include a functional HR read-out, in which cancer cells are interrogated for their ability to perform HR repair and maintain replication fork stability.
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Affiliation(s)
- Francien Talens
- a Department of Medical Oncology , University Medical Center Groningen, University of Groningen , Groningen , The Netherlands
| | - Mathilde Jalving
- a Department of Medical Oncology , University Medical Center Groningen, University of Groningen , Groningen , The Netherlands
| | - Jourik A Gietema
- a Department of Medical Oncology , University Medical Center Groningen, University of Groningen , Groningen , The Netherlands
| | - Marcel A Van Vugt
- a Department of Medical Oncology , University Medical Center Groningen, University of Groningen , Groningen , The Netherlands
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28
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Davies H, Glodzik D, Morganella S, Yates LR, Staaf J, Zou X, Ramakrishna M, Martin S, Boyault S, Sieuwerts AM, Simpson PT, King TA, Raine K, Eyfjord JE, Kong G, Borg Å, Birney E, Stunnenberg HG, van de Vijver MJ, Børresen-Dale AL, Martens JW, Span PN, Lakhani SR, Vincent-Salomon A, Sotiriou C, Tutt A, Thompson AM, Van Laere S, Richardson AL, Viari A, Campbell PJ, Stratton MR, Nik-Zainal S. HRDetect is a predictor of BRCA1 and BRCA2 deficiency based on mutational signatures. Nat Med 2017; 23:517-525. [PMID: 28288110 PMCID: PMC5833945 DOI: 10.1038/nm.4292] [Citation(s) in RCA: 660] [Impact Index Per Article: 94.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Accepted: 01/24/2017] [Indexed: 12/12/2022]
Abstract
Approximately 1-5% of breast cancers are attributed to inherited mutations in BRCA1 or BRCA2 and are selectively sensitive to poly(ADP-ribose) polymerase (PARP) inhibitors. In other cancer types, germline and/or somatic mutations in BRCA1 and/or BRCA2 (BRCA1/BRCA2) also confer selective sensitivity to PARP inhibitors. Thus, assays to detect BRCA1/BRCA2-deficient tumors have been sought. Recently, somatic substitution, insertion/deletion and rearrangement patterns, or 'mutational signatures', were associated with BRCA1/BRCA2 dysfunction. Herein we used a lasso logistic regression model to identify six distinguishing mutational signatures predictive of BRCA1/BRCA2 deficiency. A weighted model called HRDetect was developed to accurately detect BRCA1/BRCA2-deficient samples. HRDetect identifies BRCA1/BRCA2-deficient tumors with 98.7% sensitivity (area under the curve (AUC) = 0.98). Application of this model in a cohort of 560 individuals with breast cancer, of whom 22 were known to carry a germline BRCA1 or BRCA2 mutation, allowed us to identify an additional 22 tumors with somatic loss of BRCA1 or BRCA2 and 47 tumors with functional BRCA1/BRCA2 deficiency where no mutation was detected. We validated HRDetect on independent cohorts of breast, ovarian and pancreatic cancers and demonstrated its efficacy in alternative sequencing strategies. Integrating all of the classes of mutational signatures thus reveals a larger proportion of individuals with breast cancer harboring BRCA1/BRCA2 deficiency (up to 22%) than hitherto appreciated (∼1-5%) who could have selective therapeutic sensitivity to PARP inhibition.
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Affiliation(s)
- Helen Davies
- Wellcome Trust Sanger Institute, Hinxton, Cambridge CB10 1SA, UK
| | - Dominik Glodzik
- Wellcome Trust Sanger Institute, Hinxton, Cambridge CB10 1SA, UK
| | | | - Lucy R. Yates
- Wellcome Trust Sanger Institute, Hinxton, Cambridge CB10 1SA, UK
- Guys and St Thomas’ NHS Trust, London, UK
| | - Johan Staaf
- Division of Oncology and Pathology, Department of Clinical Sciences Lund, Lund University, Lund, SE-223 81, Sweden
| | - Xueqing Zou
- Wellcome Trust Sanger Institute, Hinxton, Cambridge CB10 1SA, UK
| | - Manasa Ramakrishna
- Wellcome Trust Sanger Institute, Hinxton, Cambridge CB10 1SA, UK
- Oncology, Innovative Medicines and Early Development Biotech Unit, AstraZeneca, Hodgkin Building, Chesterford Research Park, Little Chesterford, Cambridge CB10 1XL, UK
| | - Sancha Martin
- Wellcome Trust Sanger Institute, Hinxton, Cambridge CB10 1SA, UK
| | - Sandrine Boyault
- Centre Léon Bérard, Translational Research Lab Department, 28, rue Laënnec, 69373 Lyon Cedex 08, France
| | - Anieta M. Sieuwerts
- Department of Medical Oncology, Erasmus MC Cancer Institute and Cancer Genomics Netherlands, Erasmus University Medical Center, Rotterdam 3015CN, The Netherlands
| | - Peter T. Simpson
- The University of Queensland: UQ Centre for Clinical Research and School of Medicine, Brisbane, Queensland 4029, Australia
| | - Tari A. King
- Memorial Sloan Kettering Cancer Center, 1275 York Ave, New York, NY 10065, United States
| | - Keiran Raine
- Wellcome Trust Sanger Institute, Hinxton, Cambridge CB10 1SA, UK
| | - Jorunn E. Eyfjord
- Cancer Research Laboratory, Faculty of Medicine, University of Iceland, 101 Reykjavik, Iceland
| | - Gu Kong
- Department of Pathology, College of Medicine, Hanyang University, Seoul, 133-791, South Korea
| | - Åke Borg
- Division of Oncology and Pathology, Department of Clinical Sciences Lund, Lund University, Lund, SE-223 81, Sweden
| | - Ewan Birney
- European Molecular Biology Laboratory, European Bioinformatics Institute, Wellcome Trust Genome Campus,Hinxton, Cambridgeshire, CB10 1SD
| | - Hendrik G. Stunnenberg
- Department of Molecular Biology, Faculties of Science and Medicine, Radboud University, 6525GA, Nijmegen, Netherlands
| | - Marc J. van de Vijver
- Department of Pathology, Academic Medical Center, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands
| | - Anne-Lise Børresen-Dale
- Department of Cancer Genetics, Institute for Cancer Research, Oslo University Hospital The Norwegian Radium Hospital Oslo 0310, Norway
- K.G. Jebsen Centre for Breast Cancer Research, Institute for Clinical Medicine, University of Oslo, Oslo 0310, Norway
| | - John W.M. Martens
- Department of Medical Oncology, Erasmus MC Cancer Institute and Cancer Genomics Netherlands, Erasmus University Medical Center, Rotterdam 3015CN, The Netherlands
| | - Paul N. Span
- Department of Radiation Oncology, and department of Laboratory Medicine, Radboud university medical center, Nijmegen 6525GA, The Netherlands
| | - Sunil R Lakhani
- The University of Queensland: UQ Centre for Clinical Research and School of Medicine, Brisbane, Queensland 4029, Australia
- Pathology Queensland, The Royal Brisbane and Women’s Hospital, Brisbane, Queensland 4029, Australia
| | - Anne Vincent-Salomon
- Institut Curie, Department of Pathology and INSERM U934, 26 rue d'Ulm, 75248 Paris Cedex 05, France
| | - Christos Sotiriou
- Breast Cancer Translational Research Laboratory, Université Libre de Bruxelles, Institut Jules Bordet, Bd de Waterloo 121, B-1000 Brussels, Belgium
| | - Andrew Tutt
- Breast Cancer Now Research Unit, King’s College, London, UK
- Breast Cancer Now Toby Robin’s Research Centre, Institute of Cancer Research, London, UK
| | - Alastair M. Thompson
- Department of Breast Surgical Oncology, University of Texas MD Anderson Cancer Center, 1400 Pressler Street, Houston, Texas 77030, USA
| | - Steven Van Laere
- Translational Cancer Research Unit, Center for Oncological Research, Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
- HistoGeneX NV, Wilrijk, Belgium
| | - Andrea L. Richardson
- Department of Pathology, Brigham and Women's Hospital, Boston, MA 02115 USA
- Dana-Farber Cancer Institute, Boston, MA 02215 USA
| | - Alain Viari
- Equipe Erable, INRIA Grenoble-Rhône-Alpes, 655, Avenue de l'Europe, 38330 Montbonnot-Saint Martin, France
- Synergie Lyon Cancer, Centre Léon Bérard, 28 rue Laënnec, Lyon Cedex 08, France
| | - Peter J Campbell
- 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
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Ang YLE, Tan DSP. Development of PARP inhibitors in gynecological malignancies. Curr Probl Cancer 2017; 41:273-286. [PMID: 28583748 DOI: 10.1016/j.currproblcancer.2017.02.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Revised: 01/12/2017] [Accepted: 02/21/2017] [Indexed: 11/25/2022]
Abstract
PARP inhibitors demonstrate synthetic lethality in tumors with BRCA1/2 mutations and other homologous recombination repair deficiencies by interfering with DNA repair and causing direct toxicity to DNA through PARP trapping. PARP inhibitors have been shown to be beneficial in the treatment of BRCA1/2-mutated ovarian cancers, which has led to a shift in the treatment paradigm of this disease. Further studies to establish the role of PARP inhibitors during earlier stages of treatment are ongoing. The use of PARP inhibitors in other cancers with homologous recombination repair deficiencies, such as breast cancer and prostate cancer, is gradually evolving as well, including their use in the neoadjuvant and adjuvant settings. PARP inhibitor combination strategies with chemotherapy, targeted agents, radiotherapy, and immunotherapy are also being explored. The role of predictive biomarkers, including molecular signatures and homologous recombination deficiency scores based on loss of heterozygosity and other structural genomic aberrations, will be crucial to improved patient stratification to enhance the clinical utility of PARP inhibitors. This may also allow the use of PARP inhibitors to be extended beyond tumors with specific homologous recombination DNA repair gene mutations in the future. An improved understanding of the mechanisms underlying PARP inhibitor resistance will also be important to enable the development of new approaches to increase efficacy. This is a field rich in opportunity, and the coming years should see a better understanding of which patients we should be treating with PARP inhibitors and where these agents should come in over the course of treatment.
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Affiliation(s)
- Yvonne L E Ang
- Department of Hematology-Oncology, National University Cancer Institute, National University Health System, Singapore, Singapore
| | - David S P Tan
- Department of Hematology-Oncology, National University Cancer Institute, National University Health System, Singapore, Singapore; Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.
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30
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Yang T, Yildirim E. Epigenetic and LncRNA-Mediated Regulation of X Chromosome Inactivation and Its Impact on Pathogenesis. CURRENT PATHOBIOLOGY REPORTS 2017. [DOI: 10.1007/s40139-017-0120-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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31
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Lancaster JM, Dressman HK, Whitaker RS, Havrilesky L, Gray J, Marks JR, Nevins JR, Berchuck A. Gene Expression Patterns That Characterize Advanced Stage Serous Ovarian Cancers. ACTA ACUST UNITED AC 2016; 11:51-9. [PMID: 14706684 DOI: 10.1016/j.jsgi.2003.07.004] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
OBJECTIVE To identify gene expression patterns that characterize advanced stage serous ovarian cancers by using microarray expression analysis. METHODS Using genome-wide expression analysis, we compared a series of 31 advanced stage (III or IV) serous ovarian cancers from patients who survived either less than 2 years or more than 7 years with three normal ovarian epithelial samples. Array findings were validated by analysis of expression of the insulin-like growth factor binding protein 2 (IGFBP2) and tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) genes using quantitative real-time polymerase chain reaction (QRT-PCR). RESULTS Hierarchical clustering identified patterns of gene expression that distinguished cancer from normal ovarian epithelium. We also identified gene expression patterns that distinguish cancers on the basis of patient survival. These genes include many that are associated with immune function. Expression of IGFBP2 and TRAIL genes measured by array and QRT-PCR analysis demonstrated correlation coefficients of 0.63 and 0.78, respectively. CONCLUSION Global expression analysis can identify expression patterns and individual genes that contribute to ovarian cancer development and outcome. Many of the genes that determine ovarian cancer survival are associated with the immune response, suggesting that immune function influences ovarian cancer virulence. With the generation of newer arrays with more transcripts, larger studies are possible to fully characterize genetic signatures that predict survival that may ultimately be used to guide therapeutic decision-making.
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Affiliation(s)
- Johnathan M Lancaster
- Department of Obstetrics and Gynecology, Division of Gynecologic Oncology, Duke University Medical Center, Durham, North Carolina 27710, USA
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32
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Minn AJ. Interferons and the Immunogenic Effects of Cancer Therapy. Trends Immunol 2016; 36:725-737. [PMID: 26604042 DOI: 10.1016/j.it.2015.09.007] [Citation(s) in RCA: 91] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Revised: 09/17/2015] [Accepted: 09/17/2015] [Indexed: 01/04/2023]
Abstract
Much of our understanding on resistance mechanisms to conventional cancer therapies such as chemotherapy and radiation has focused on cell intrinsic properties that antagonize the detrimental effects of DNA and other cellular damage. However, it is becoming clear that the immune system and/or innate immune signaling pathways can integrate with these intrinsic mechanisms to profoundly influence treatment efficacy. In this context, recent evidence indicates that interferon (IFN) signaling has an important role in this integration by influencing immune and intrinsic/non-immune determinants of therapy response. However, IFN signaling can be both immunostimulatory and immunosuppressive, and the factors determining these outcomes in different disease settings are unclear. Here I discuss the regulation and molecular events in cancer that are associated with these dichotomous functions.
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Affiliation(s)
- Andy J Minn
- Department of Radiation Oncology and Abramson Family Cancer Research Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.
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33
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Gau DM, Lesnock JL, Hood BL, Bhargava R, Sun M, Darcy K, Luthra S, Chandran U, Conrads TP, Edwards RP, Kelley JL, Krivak TC, Roy P. BRCA1 deficiency in ovarian cancer is associated with alteration in expression of several key regulators of cell motility - A proteomics study. Cell Cycle 2016; 14:1884-92. [PMID: 25927284 DOI: 10.1080/15384101.2015.1036203] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Functional loss of expression of breast cancer susceptibility gene 1(BRCA1) has been implicated in genomic instability and cancer progression. There is emerging evidence that BRCA1 gene product (BRCA1) also plays a role in cancer cell migration. We performed a quantitative proteomics study of EOC patient tumor tissues and identified changes in expression of several key regulators of actin cytoskeleton/cell adhesion and cell migration (CAPN1, 14-3-3, CAPG, PFN1, SPTBN1, CFN1) associated with loss of BRCA1 function. Gene expression analyses demonstrate that several of these proteomic hits are differentially expressed between early and advanced stage EOC thus suggesting clinical relevance of these proteins to disease progression. By immunohistochemistry of ovarian tumors with BRCA1(+/+) and BRCA1(null) status, we further verified our proteomic-based finding of elevated PFN1 expression associated with BRCA1 deficiency. Finally, we established a causal link between PFN1 and BRCA1-induced changes in cell migration thus uncovering a novel mechanistic basis for BRCA1-dependent regulation of ovarian cancer cell migration. Overall, findings of this study open up multiple avenues by which BRCA1 can potentially regulate migration and metastatic phenotype of EOC cells.
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Key Words
- BRCA1
- BRCA1, Breast cancer susceptibility gene 1
- BRCA2, Breast cancer susceptibility gene 2
- CAPG, Macrophage capping protein
- CAPN1, Calpain-1
- CFN1, Cofilin-1
- EOC, Epithelial Ovarian Cancer
- ERM, Ezrin-Radixin-Moesin
- FFPE, Formalin-fixed paraffin-embedded
- HYOU1, Hypoxia upregulated protein 1
- ID1, Inhibitor of differentiation-1
- IHC, Immunohistochemistry
- LC MS-MS, Liquid chromatography tandem mass spectrometry
- Luc, luciferase
- PFN1, Profilin-1
- PP2A, Protein phosphatase 2A
- SPTBN1, Non-erythrocytic spectrin β Chain-1
- WT, Wild-type
- cell Motility
- ovarian cancer
- profilin-1
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Affiliation(s)
- David M Gau
- a Department of Bioengineering; University of Pittsburgh ; Pittsburgh , PA , USA
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Zhang M, Liu G, Xue F, Edwards R, Sood AK, Zhang W, Yang D. Copy number deletion of RAD50 as predictive marker of BRCAness and PARP inhibitor response in BRCA wild type ovarian cancer. Gynecol Oncol 2016; 141:57-64. [PMID: 27016230 PMCID: PMC4967351 DOI: 10.1016/j.ygyno.2016.01.004] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Revised: 01/04/2016] [Accepted: 01/05/2016] [Indexed: 12/14/2022]
Abstract
OBJECTIVE To identify novel prognostic and therapeutic markers for PARP inhibitors in BRCA wild type ovarian cancer (OvCa). METHODS BRCAness status was defined by analyzing whole-exome deep sequencing data from 220 BRCAwt OvCa cases in TCGA. Thirty-three DNA-repair genes were screened in an integrated manner for BRCA-independent mechanism of BRCAness using multiple-dimensional genomic data. Publicly available databases and siRNA knock-down were used for external validation and evaluation of drug response in OvCa cell lines. RESULTS In 220 BRCAwt OvCa patients, tumors exhibiting the BRCAness signature have enhanced OS (HR [95% CI]=0.33 [0.15-0.69], P=0.004) and PFS (HR [95% CI]=0.51 [0.24-1.08], P=0.077), strongly suggesting a BRCA-independent mechanism of drug sensitivity in those patients. Systematic screening of driving molecular events of BRCAness revealed that RAD50 deletion is a marker of BRCAness. The RAD50 deletion occurred in 18% of BRCAwt OvCa patients. RAD50 deletion led to its decreased mRNA expression in tumors (fold change=0.63, P=3.56×10(-13)). In BRCAwt patients, RAD50 deletion was associated with significantly better OS (HR [95% CI]=0.44 [0.25-0.78], P=0.005) and PFS (HR [95% CI]=0.60 [0.37-0.99], P=0.044), adjusted by age and stage. Knockdown of RAD50 expression augmented OvCa cell's responses to cisplatin and olaparib. Among 19 OvCa cell lines, the RAD50 copy number deletion is significantly associated with better responses to two structurally distinct PARPis (i.e. olaparib and rucaparib). CONCLUSION Our study identified the copy number deletion of RAD50 as a candidate marker for survival and response to PARPis in BRCAwt OvCa tumors.
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Affiliation(s)
- Min Zhang
- Center for Pharmacogenetics, Department of Pharmaceutical Sciences, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Guoyan Liu
- Department of Gynecology and Obstetrics, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - Fengxia Xue
- Department of Gynecology and Obstetrics, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - Robert Edwards
- Department of Obstetrics, Gynecology & Reproductive Sciences, Magee-Womens Hospital of UPMC, Pittsburgh, PA 15213, USA
| | - Anil K Sood
- Department of Gynecologic Oncology and Reproductive Medicine, Center for RNAi and Non-Coding RNA, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Wei Zhang
- Department of Pathology, University of Texas MD Anderson Cancer Center Informatics Center, Houston, TX 77030, USA
| | - Da Yang
- Center for Pharmacogenetics, Department of Pharmaceutical Sciences, University of Pittsburgh, Pittsburgh, PA 15261, USA; Women's Cancer Research Center, University of Pittsburgh Cancer Institute, Pittsburgh, PA 15213, USA; Department of Computational & Systems Biology, University of Pittsburgh, Pittsburgh, PA 15261, USA.
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Abstract
Over the past 20 years, there has been considerable progress in our understanding of the biological functions of the BRCA1 and BRCA2 cancer susceptibility genes. This has led to the development of new therapeutic approaches that target tumours with loss-of-function mutations in either BRCA1 or BRCA2. Tumours that share molecular features of BRCA-mutant tumours - that is, those with 'BRCAness' - may also respond to similar therapeutic approaches. Several paradigm shifts require a reassessment of the concept of BRCAness, how this property is assayed and its relevance to our understanding of tumour biology and the treatment of cancer.
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Affiliation(s)
- Christopher J Lord
- Cancer Research UK Gene Function Laboratory and Breast Cancer Now Research Centre, The Institute of Cancer Research, London SW3 6JB, UK
| | - Alan Ashworth
- UCSF Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, California 94158, USA
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BRCAness revisited. NATURE REVIEWS. CANCER 2016. [PMID: 26775620 DOI: 10.1038/nrc.2015.21]+[] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Over the past 20 years, there has been considerable progress in our understanding of the biological functions of the BRCA1 and BRCA2 cancer susceptibility genes. This has led to the development of new therapeutic approaches that target tumours with loss-of-function mutations in either BRCA1 or BRCA2. Tumours that share molecular features of BRCA-mutant tumours - that is, those with 'BRCAness' - may also respond to similar therapeutic approaches. Several paradigm shifts require a reassessment of the concept of BRCAness, how this property is assayed and its relevance to our understanding of tumour biology and the treatment of cancer.
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Abstract
Over the past 20 years, there has been considerable progress in our understanding of the biological functions of the BRCA1 and BRCA2 cancer susceptibility genes. This has led to the development of new therapeutic approaches that target tumours with loss-of-function mutations in either BRCA1 or BRCA2. Tumours that share molecular features of BRCA-mutant tumours - that is, those with 'BRCAness' - may also respond to similar therapeutic approaches. Several paradigm shifts require a reassessment of the concept of BRCAness, how this property is assayed and its relevance to our understanding of tumour biology and the treatment of cancer.
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38
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Synowiec A, Wcisło G, Bodnar L, Górski B, Szenajch J, Szarlej-Wcisło K, Szczylik C. Clinical features and outcomes of germline mutation BRCA1-linked versus sporadic ovarian cancer patients. Hered Cancer Clin Pract 2016; 14:1. [PMID: 26753012 PMCID: PMC4706695 DOI: 10.1186/s13053-015-0044-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Accepted: 12/29/2015] [Indexed: 01/07/2023] Open
Abstract
Background The role of germline mutations in BRCA1 and BRCA2 genes in the risk of the development of ovarian cancer is clinically well established. BRCA1/2 testing seems to have increasing role in clinical management in patients with advanced ovarian cancer who require treatment with poly(ADP-ribose) polymerase inhibitors. Methods Between 2002 – 2008, 125 consecutive patients with ovarian cancer were categorized as having three founder mutations in the BRCA1 gene in Poland as: 5382insC [exon 20], 4153delA [exon 11.17], and 300 T > G [exon 5]. PFS (progression free survival) and OS (overall survival) were determined by Kaplan-Meier analysis with log rank test, univariate comparisons, and multivariate regression analysis using Cox proportional hazards model. Results Of the 125 patients, the founder mutations of BRCA1 were reported in 17 patients (13.6 %). The median OS was longer for BRCA mutated patients (not reached vs 35.6 months, p = 0.041). PFS was similar for both kinds of ovarian cancer. In multivariate analysis, age ≥70 years, suboptimal surgery, and BRCA1 wild type were poor prognostic factors. The BRCA1 mutation reduced the likelihood of death in ovarian cancer by 86 % (HR 0.14; CI: 0.032-0.650, p = 0.012). Conclusion In conclusion, we found better overall survival for ovarian cancer patients with BRCA1 germline mutations in comparison with patients without these mutations (sporadic) ovarian cancer. Thus, BRCA1 germline mutations appear to be an independent prognostic factor for ovarian cancer.
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Affiliation(s)
- Agnieszka Synowiec
- Department of Oncology, Military Institute of Medicine, 128 Szaserow Str., 04-141 Warsaw, Poland
| | - Gabriel Wcisło
- Department of Oncology, Military Institute of Medicine, 128 Szaserow Str., 04-141 Warsaw, Poland
| | - Lubomir Bodnar
- Department of Oncology, Military Institute of Medicine, 128 Szaserow Str., 04-141 Warsaw, Poland
| | - Bohdan Górski
- Department of Genetics and Pathology, Pomeranian Medical University, Szczecin, Poland
| | - Jolanta Szenajch
- Department of Oncology, Military Institute of Medicine, 128 Szaserow Str., 04-141 Warsaw, Poland
| | - Katarzyna Szarlej-Wcisło
- Department of Oncology, Military Institute of Medicine, 128 Szaserow Str., 04-141 Warsaw, Poland
| | - Cezary Szczylik
- Department of Oncology, Military Institute of Medicine, 128 Szaserow Str., 04-141 Warsaw, Poland
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Beirne JP, Irwin GW, McIntosh SA, Harley IJG, Harkin DP. The molecular and genetic basis of inherited cancer risk in gynaecology. ACTA ACUST UNITED AC 2015. [DOI: 10.1111/tog.12213] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- James P Beirne
- Northern Ireland Gynaecological Cancer Centre; Belfast City Hospital; Belfast Health and Social Care Trust; Belfast, Northern Ireland and Gynaecological Cancer Research Focus Group; Centre for Cancer Research and Cell Biology; Queens University; Belfast Northern Ireland
| | - Gareth W Irwin
- Northern Ireland Regional Breast Unit, Belfast City Hospital; Belfast Health and Social Care Trust; Belfast; Northern Ireland and Breast Cancer Research Focus Group; Centre for Cancer Research and Cell Biology; Queens University; Belfast Northern Ireland
| | - Stuart A McIntosh
- Northern Ireland Regional Breast Unit, Belfast City Hospital; Belfast Health and Social Care Trust; Belfast; Northern Ireland and Breast Cancer Research Focus Group; Centre for Cancer Research and Cell Biology; Queens University; Belfast Northern Ireland
| | - Ian JG Harley
- Northern Ireland Gynaecological Cancer Centre; Belfast City Hospital; Belfast Health and Social Care Trust; Belfast, Northern Ireland and Gynaecological Cancer Research Focus Group; Centre for Cancer Research and Cell Biology; Queens University; Belfast Northern Ireland
| | - D Paul Harkin
- Breast Cancer Research Focus Group; Centre for Cancer Research and Cell Biology; Queens University; Belfast Northern Ireland
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Nai GA, Filho MAG, Estrella MPS, Teixeira LDS. Study of the influence of the ph of water in the initiation of digestive tract injury in cadmium poisoning in rats. Toxicol Rep 2015; 2:1033-1038. [PMID: 28962445 PMCID: PMC5598283 DOI: 10.1016/j.toxrep.2015.07.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2015] [Revised: 07/14/2015] [Accepted: 07/14/2015] [Indexed: 12/02/2022] Open
Abstract
Cancer has genetic and environmental causes, one of which is the ingestion of heavy metals such as cadmium. Objective To evaluate the lesions caused by cadmium poisoning in the digestive tract and the possible effect of the drinking water pH in the initiation of these lesions. Methods 90 male Wistar rats were used, divided into six groups (n = 15): A – received 400 mg/l cadmium chloride (CdCl2) in drinking water at a neutral pH of 7.0; B – received CdCl2 (400 mg/l) in drinking water at an acidic pH of 5.0; C – received CdCl2 (400 mg/l) in drinking water at a basic pH of 8.0; D – received water at an acidic pH of 5.0; E – received water at a basic pH of 8.0; and F – received water at a neutral pH of 7.0. Animals were euthanized after 6 months. Samples of the esophagus, stomach, small intestine and large intestine of each rat were removed for microscopic analysis. Results There were no microscopic changes in either the esophagus or small and large intestines. Only cadmium-exposed animals showed mild dysplasia of the gastric mucosa (p = 0.012), regardless of the pH (p > 0.05). Conclusion Cadmium exposure led to the formation of dysplastic lesions in the gastric glandular epithelium, regardless of the water pH.
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Affiliation(s)
- Gisele Alborghetti Nai
- Department of Pathology, Universidade do Oeste Paulista (UNOESTE), Rua José Bongiovani, 700, 19050-680 Presidente Prudente, SP, Brazil
| | - Mozart Alves Gonçalves Filho
- Department of Internal Medicine, Universidade do Oeste Paulista (UNOESTE), Rua José Bongiovani, 700, 19050-680 Presidente Prudente, SP, Brazil
| | | | - Larissa Di Santi Teixeira
- Medical College, Universidade do Oeste Paulista (UNOESTE), Rua José Bongiovani, 700, 19050-680 Presidente Prudente, SP, Brazil
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41
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Veskimäe K, Staff S, Tabaro F, Nykter M, Isola J, Mäenpää J. Microarray analysis of differentially expressed genes in ovarian and fallopian tube epithelium from risk-reducing salpingo-oophorectomies. Genes Chromosomes Cancer 2015; 54:276-87. [PMID: 25706666 DOI: 10.1002/gcc.22241] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2014] [Accepted: 01/02/2015] [Indexed: 11/11/2022] Open
Abstract
Mutations in the BRCA1 and BRCA2 genes confer an increased lifetime risk for breast and ovarian cancer. Ovarian cancer risk can be decreased by risk-reducing salpingo-oophorectomy (RRSO). Studies on RRSO material have altered the paradigm of serous ovarian cancer pathogenesis. The purpose of this study was to identify candidate genes possibly involved in the pathogenesis of serous ovarian cancer by carrying out a microarray analysis of differentially expressed genes in BRCA1/2- mutation positive ovarian and fallopian tube epithelium derived from RRSO surgery. Freshly frozen ovarian and fallopian tube samples from nine BRCA1/2 mutation carriers scheduled for RRSO were prospectively collected together with five mutation-negative control patients undergoing salpingo-oophorectomy for benign indications. Microarray analysis of genome-wide gene expression was performed on ovarian and fallopian tube samples from the BRCA1/2 and control patients. The validation of microarray data was performed by quantitative real-time polymerase chain reaction (qRT-PCR) in selected cases of RRSO samples and also in high grade serous carcinoma samples collected from patients with a BRCA phenotype. From 22,733 genes, 454 transcripts were identified that were differentially expressed in BRCA1/2 mutation carriers when compared with controls, pooling all ovarian and fallopian tube samples together. Of these, 299 genes were statistically significantly downregulated and 155 genes upregulated. Differentially expressed genes in BRCA1/2 samples reported here might be involved in serous ovarian carcinogenesis and provide interesting targets for further studies.
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Affiliation(s)
- Kristina Veskimäe
- Department of Obstetrics and Gynecology, Tampere University Hospital, Tampere, Finland
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42
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Xu H, Xian J, Vire E, McKinney S, Wong J, Wei V, Tong R, Kouzarides T, Caldas C, Aparicio S. Up-regulation of the interferon-related genes in BRCA2 knockout epithelial cells. J Pathol 2014; 234:386-97. [PMID: 25043256 PMCID: PMC4882165 DOI: 10.1002/path.4404] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2014] [Revised: 07/03/2014] [Accepted: 07/06/2014] [Indexed: 12/30/2022]
Abstract
BRCA2 mutations are significantly associated with early-onset breast cancer, and the tumour-suppressing function of BRCA2 has been attributed to its involvement in homologous recombination (HR)-mediated DNA repair. In order to identify additional functions of BRCA2, we generated BRCA2-knockout HCT116 human colorectal carcinoma cells. Using genome-wide microarray analyses, we have discovered a link between the loss of BRCA2 and the up-regulation of a subset of interferon (IFN)-related genes, including APOBEC3F and APOBEC3G. The over-expression of IFN-related genes was confirmed in different human BRCA2(-/-) and mouse Brca2(-/-) tumour cell lines, and was independent of senescence and apoptosis. In isogenic wild-type BRCA2 cells, we observed over-expression of IFN-related genes after treatment with DNA-damaging agents, and following ionizing radiation. Cells with endogenous DNA damage because of defective BRCA1 or RAD51 also exhibited over-expression of IFN-related genes. Transcriptional activity of the IFN-stimulated response element (ISRE) was increased in BRCA2 knockout cells, and the expression of BRCA2 greatly decreased IFNα-stimulated ISRE reporter activity, suggesting that BRCA2 directly represses the expression of IFN-related genes through the ISRE. Finally, the colony-forming capacity of BRCA2 knockout cells was significantly reduced in the presence of either IFNβ or IFNγ, suggesting that IFNs may have potential as therapeutic agents in cancer cells with BRCA2 mutations. The GEO Accession No. for microarray analysis is GSE54830.
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Affiliation(s)
- Hong Xu
- Department of Molecular Oncology, British Columbia Cancer Agency, 675 West 10th Avenue, Vancouver, BC, V5Z 1L3, Canada
| | - Jian Xian
- Department of Oncology, University of Cambridge and Cancer Research UK Cambridge Research Institute, Li Ka Shing Centre, Cambridge, CB2 0RE, UK
| | - Emmanuelle Vire
- Wellcome Trust/Cancer Research UK Gurdon Institute, The Henry Wellcome Building of Cancer and Developmental Biology, University of Cambridge, Tennis Court Road, Cambridge CB2 1QN, UK
| | - Steven McKinney
- Department of Molecular Oncology, British Columbia Cancer Agency, 675 West 10th Avenue, Vancouver, BC, V5Z 1L3, Canada
| | - Jason Wong
- Department of Molecular Oncology, British Columbia Cancer Agency, 675 West 10th Avenue, Vancouver, BC, V5Z 1L3, Canada
| | - Vivien Wei
- Department of Microbiology and Immunology, University of British Columbia, 1365 - 2350 Health Sciences Mall, Vancouver, British Columbia, Canada, V6T 1Z3
| | - Rebecca Tong
- Department of Microbiology and Immunology, University of British Columbia, 1365 - 2350 Health Sciences Mall, Vancouver, British Columbia, Canada, V6T 1Z3
| | - Tony Kouzarides
- Wellcome Trust/Cancer Research UK Gurdon Institute, The Henry Wellcome Building of Cancer and Developmental Biology, University of Cambridge, Tennis Court Road, Cambridge CB2 1QN, UK
| | - Carlos Caldas
- Department of Oncology, University of Cambridge and Cancer Research UK Cambridge Research Institute, Li Ka Shing Centre, Cambridge, CB2 0RE, UK
| | - Samuel Aparicio
- Department of Molecular Oncology, British Columbia Cancer Agency, 675 West 10th Avenue, Vancouver, BC, V5Z 1L3, Canada
- Department of Pathology and Laboratory Medicine, University of British Columbia, Wesbrook Mall, Vancouver, BC, V6T 2B5 Vancouver, BC
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Correlation between gene expression and mutator phenotype predicts homologous recombination deficiency and outcome in ovarian cancer. J Mol Med (Berl) 2014; 92:1159-68. [PMID: 25062964 DOI: 10.1007/s00109-014-1191-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Revised: 05/29/2014] [Accepted: 06/03/2014] [Indexed: 12/14/2022]
Abstract
UNLABELLED New strategies are needed to predict response to platinum-based chemotherapy and outcome of ovarian cancers. We hypothesized that the mutator phenotype in the cancer genome represents the overuse of alternative DNA repair mechanisms, which might be a sign of homologous recombination (HR) deficiency and can be captured by gene expression. Multidimensional data of ovarian cancer patients and breast cancer patients from The Cancer Genome Atlas (TCGA) database were used for the development and validation of a potential clinical information-independent score that correlates with HR deficiency and predicts outcome. Correlation of the score with platinum response, outcome, and BRCA mutations was assessed. The score correlated with increased genomic mutation rate in both ovarian cancer and breast cancer cases that harbored a substantial subset of HR-deficient samples. Significantly improved outcomes were observed in the high-scoring group versus the low-scoring group in the TCGA dataset and in three large gene expression microarray datasets. A strong correlation was found between the score and the likelihood of achieving complete response to chemotherapy. The score was also found to be highly robust to noises in genomic mutations. Sixty-four patients harboring BRCA mutations were successfully divided into two groups based on scores, with the high-scoring group showing significantly improved outcomes compared with wild-type cases and the low-scoring group showing no significance in all the same analyses. The score was significantly correlated with the response to platinum therapy and outcome. Evaluation of the score as a prognostic tool in ovarian cancer patients is warranted. KEY MESSAGE We develop a diagnostic signature for the HR-deficiency based on a novel hypothesis. HR-deficiency score is significantly correlated to platinum therapy and outcomes. HRDS was validated by its association with OS, PFS, DFS and CR in validation datasets. Evaluation of the score as a prognostic tool in ovarian cancer patients is warranted.
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Transcriptome profiling of the cancer and normal tissues from gastric cancer patients by deep sequencing. Tumour Biol 2014; 35:7423-7. [DOI: 10.1007/s13277-014-2003-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2014] [Accepted: 04/22/2014] [Indexed: 11/26/2022] Open
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Lawlor D, Martin P, Busschots S, Thery J, O'Leary JJ, Hennessy BT, Stordal B. PARP Inhibitors as P-glyoprotein Substrates. J Pharm Sci 2014; 103:1913-20. [PMID: 24700236 DOI: 10.1002/jps.23952] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2013] [Revised: 02/27/2014] [Accepted: 02/28/2014] [Indexed: 01/23/2023]
Abstract
The cytotoxicity of PARP inhibitors olaparib, veliparib, and CEP-8983 were investigated in two P-glycoprotein (P-gp) overexpressing drug-resistant cell models (IGROVCDDP and KB-8-5-11). IGROVCDDP and KB-8-5-11 were both resistant to olaparib and resistance was reversible with the P-gp inhibitors elacridar, zosuquidar, and valspodar. In contrast, the P-gp overexpressing models were not resistant to veliparib or CEP-8983. Olaparib and veliparib did not induce protein expression of P-gp in IGROVCDDP or KB-8-5-11 at doses that successfully inhibit PARP. Olaparib therefore appears to be a P-gp substrate. Veliparib and CEP-8983 do not appear to be substrates. Veliparib and CEP-8983 may therefore be more useful in combined chemotherapy regimens with P-gp substrates and may be active in platinum and taxane-resistant ovarian cancer.
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Affiliation(s)
- Denise Lawlor
- Department of Histopathology, St James' Hospital and Trinity College, Dublin, Dublin 8, Ireland
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Jacq X, Kemp M, Martin NMB, Jackson SP. Deubiquitylating enzymes and DNA damage response pathways. Cell Biochem Biophys 2014; 67:25-43. [PMID: 23712866 PMCID: PMC3756857 DOI: 10.1007/s12013-013-9635-3] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Covalent post-translational modification of proteins by ubiquitin and ubiquitin-like factors has emerged as a general mechanism to regulate myriad intra-cellular processes. The addition and removal of ubiquitin or ubiquitin-like proteins from factors has recently been demonstrated as a key mechanism to modulate DNA damage response (DDR) pathways. It is thus, timely to evaluate the potential for ubiquitin pathway enzymes as DDR drug targets for therapeutic intervention. The synthetic lethal approach provides exciting opportunities for the development of targeted therapies to treat cancer: most tumours have lost critical DDR pathways, and thus rely more heavily on the remaining pathways, while normal tissues are still equipped with all DDR pathways. Here, we review key deubiquitylating enzymes (DUBs) involved in DDR pathways, and describe how targeting DUBs may lead to selective therapies to treat cancer patients.
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Affiliation(s)
- Xavier Jacq
- MISSION Therapeutics Ltd, Babraham Research Campus, Cambridge, CB22 3AT, UK.
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Shilpa V, Bhagat R, Premalata CS, Pallavi VR, Ramesh G, Krishnamoorthy L. BRCA1 promoter hypermethylation and protein expression in ovarian carcinoma--an Indian study. Tumour Biol 2014; 35:4277-84. [PMID: 24385383 DOI: 10.1007/s13277-013-1558-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2013] [Accepted: 12/13/2013] [Indexed: 01/05/2023] Open
Abstract
Mounting evidences suggest that aberrant methylation of CpG islands is a major pathway leading to the inactivation of tumour suppressor genes and the development of cancer. The aim of the current study was to examine the prevalence of the promoter hypermethylation and protein expression of the BRCA1 gene in epithelial ovarian carcinoma (EOC) to understand the role of epigenetic silencing in ovarian carcinogenesis. We studied the promoter methylation of the BRCA1 gene by methylation-specific PCR in a cohort of 88 patients with EOC, 14 low malignant potential (LMP) tumours and 20 patients with benign tumours of the ovary. The expression of the BRCA1 protein by immunohistochemical analysis was carried out in a subset of 64 EOCs, 10 LMP tumours, 10 benign tumours and 5 normal ovarian tissues. The frequencies of methylation in EOCs and LMP tumours were 51.2 and 57%, respectively, significantly higher (p = 0.000 and p = 0.001) in comparison to benign tumours and normal ovarian tissue where no methylation was seen. Expression of BRCA1 was significantly lower in EOCs (p = 0.003). Lack of protein expression correlated with tumour grade and type. The methylation status correlated well with downregulation of BRCA1 expression. Our results clearly demonstrate that hypermethylation of BRCA1 promoter is a frequent event in ovarian cancer. These data support the hypothesis that BRCA1 promoter methylation plays an important role in the functional inactivation of BRCA1. Follow-up clinical data will reveal the impact of BRCA1 methylation on survival.
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Affiliation(s)
- V Shilpa
- Department of Biochemistry, Kidwai Memorial Institute of Oncology, Dr. M. H. Marigowda Road, Bangalore, 560029, India,
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48
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Molecular targets for epithelial ovarian cancer. Mol Oncol 2013. [DOI: 10.1017/cbo9781139046947.055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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49
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Hirasawa A, Masuda K, Akahane T, Ueki A, Yokota M, Tsuruta T, Nomura H, Kataoka F, Tominaga E, Banno K, Makita K, Susumu N, Sugano K, Kosaki K, Kameyama K, Aoki D. Family history and BRCA1/BRCA2 status among Japanese ovarian cancer patients and occult cancer in a BRCA1 mutant case. Jpn J Clin Oncol 2013; 44:49-56. [PMID: 24218521 DOI: 10.1093/jjco/hyt171] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
BACKGROUND This study aimed to examine family history among Japanese ovarian cancer patients and to investigate the TP53 status of fallopian tube epithelial and ovarian cancer cells in a Japanese BRCA1 mutant case that may be associated with the transformed state in hereditary ovarian cancer. METHODS One hundred and two primary ovarian cancer patients were retrospectively evaluated in this cross-sectional study. The family history of cancer was determined in probands. In a BRCA1 mutant case, p53 immunostaining and direct sequencing, followed by laser-capture microdissection, were performed for the fallopian tube, considered the origin of ovarian cancer. RESULTS Nine of 102 (8.8%) families were regarded as having hereditary breast-ovarian cancer syndrome, two families (2.0%) were diagnosed with Lynch syndrome and six patients harbored BRCA1 or BRCA2 mutations. One case underwent risk-reductive salpingo-oophorectomy as a BRCA1 mutant carrier was retrospectively diagnosed as occult cancer. Common TP53 mutations were detected in cancer and fallopian tube epithelial cells in the case. CONCLUSIONS Here, we integrate family cancer history and histology in ovarian cancer cases as well as TP53 status in a BRCA1 mutant case into a discussion regarding carcinogenesis in a Japanese population. The TP53 status for the BRCA1 mutant case examined here supports the recently proposed theory that ovarian cancer develops because of BRCA1 or BRCA2 inactivation and/or TP53 mutations.
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Affiliation(s)
- Akira Hirasawa
- *Department of Obstetrics and Gynecology, School of Medicine, Keio University, 35 Shinanomachi, Shinjyuku-ku, Tokyo 160-8582, Japan.
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Abdallah BY, Horne SD, Kurkinen M, Stevens JB, Liu G, Ye CJ, Barbat J, Bremer SW, Heng HHQ. Ovarian cancer evolution through stochastic genome alterations: defining the genomic role in ovarian cancer. Syst Biol Reprod Med 2013; 60:2-13. [PMID: 24147962 DOI: 10.3109/19396368.2013.837989] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Ovarian cancer is the fifth leading cause of death among women worldwide. Characterized by complex etiology and multi-level heterogeneity, its origins are not well understood. Intense research efforts over the last decade have furthered our knowledge by identifying multiple risk factors that are associated with the disease. However, it is still unclear how genetic heterogeneity contributes to tumor formation, and more specifically, how genome-level heterogeneity acts as the key driving force of cancer evolution. Most current genomic approaches are based on 'average molecular profiling.' While effective for data generation, they often fail to effectively address the issue of high level heterogeneity because they mask variation that exists in a cell population. In this synthesis, we hypothesize that genome-mediated cancer evolution can effectively explain diverse factors that contribute to ovarian cancer. In particular, the key contribution of genome replacement can be observed during major transitions of ovarian cancer evolution including cellular immortalization, transformation, and malignancy. First, we briefly review major updates in the literature, and illustrate how current gene-mediated research will offer limited insight into cellular heterogeneity and ovarian cancer evolution. We next explain a holistic framework for genome-based ovarian cancer evolution and apply it to understand the genomic dynamics of a syngeneic ovarian cancer mouse model. Finally, we employ single cell assays to further test our hypothesis, discuss some predictions, and report some recent findings.
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