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Jeffreys SA, Becker TM, Khan S, Soon P, Neubauer H, de Souza P, Powter B. Prognostic and Predictive Value of CCND1/Cyclin D1 Amplification in Breast Cancer With a Focus on Postmenopausal Patients: A Systematic Review and Meta-Analysis. Front Endocrinol (Lausanne) 2022; 13:895729. [PMID: 35784572 PMCID: PMC9249016 DOI: 10.3389/fendo.2022.895729] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Accepted: 05/10/2022] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND Up to 80% of breast cancers (BCa) are estrogen receptor positive and current treatments target the estrogen receptor (endocrine therapies) and/or CDK4/6 (CDK4/6 inhibitors). CCND1 encodes the protein cyclin D1, responsible for regulation of G1 to S phase transition in the cell cycle. CCND1 amplification is common in BCa and contributes to increased cyclin D1 expression. As there are signalling interactions between cyclin D1 and the estrogen receptor, understanding the impact of CCND1 amplification on estrogen receptor positive patients' disease outcomes, is vital. This review aims to evaluate CCND1 amplification as a prognostic and predictive biomarker in BCa. MATERIALS AND METHODS Publications were retrieved from the databases: PubMed, MEDLINE, Embase and Cochrane library. Exclusion criteria were duplication, publication type, non-English language, in vitro and animal studies, not BCa, male BCa, premenopausal BCa, cohort size <35, CCND1 amplification not reported. Publications with cohort duplication, and inadequate recurrence free survival (RFS) and overall survival (OS) data, were also excluded. Included publications were assessed for Risk of Bias (RoB) using the Quality In Prognosis Studies tool. Statistical analyses (Inverse Variance and Mantel-Haenszel) were performed in Review Manager. The PROSPERO registration number is [CRD42020208179]. RESULTS CCND1 amplification was significantly associated with positive estrogen receptor status (OR:1.70, 95% CI:1.19-2.43, p = 0.004) and cyclin D1 overexpression (OR: 5.64, 95% CI: 2.32-13.74, p=0.0001). CCND1 amplification was significantly associated with shorter RFS (OR: 1.64, 95% CI: 1.13-2.38, p = 0.009), and OS (OR: 1.51, 95% CI: 1.19-1.92, p = 0.0008) after removal of studies with a high RoB. In endocrine therapy treated patients specifically, CCND1 amplification predicted shorter RFS (HR: 2.59, 95% CI: 1.96-3.41, p < 0.00001) and OS (HR: 1.59, 95% CI: 1.00-2.49, p = 0.05) also after removal of studies with a high RoB. CONCLUSION While a lack of standardised approach for the detection of CCND1 amplification is to be considered as a limitation, CCND1 amplification was found to be prognostic of shorter RFS and OS in BCa. CCND1 amplification is also predictive of reduced RFS and OS in endocrine therapy treated patients specifically. With standardised methods and cut offs for the detection of CCND1 amplification, CCND1 amplification would have potential as a predictive biomarker in breast cancer patients. SYSTEMATIC REVIEW REGISTRATION https://www.crd.york.ac.uk/prospero/, identifier CRD42020208179.
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Affiliation(s)
- Sarah A. Jeffreys
- Centre of Circulating Tumour Cell Diagnostics and Research, Ingham Institute of Applied Medical Research, Liverpool, NSW, Australia
- School of Medicine, Western Sydney University, Campbelltown, NSW, Australia
- *Correspondence: Sarah A. Jeffreys,
| | - Therese M. Becker
- Centre of Circulating Tumour Cell Diagnostics and Research, Ingham Institute of Applied Medical Research, Liverpool, NSW, Australia
- South Western Sydney Clinical School, University of New South Wales, Liverpool Hospital, Liverpool, NSW, Australia
| | - Sarah Khan
- Department of Medical Oncology, Bankstown Cancer Centre, Bankstown, NSW, Australia
| | - Patsy Soon
- Centre of Circulating Tumour Cell Diagnostics and Research, Ingham Institute of Applied Medical Research, Liverpool, NSW, Australia
- South Western Sydney Clinical School, University of New South Wales, Liverpool Hospital, Liverpool, NSW, Australia
- Department of Surgery, Bankstown Hospital, Bankstown, NSW, Australia
| | - Hans Neubauer
- Department of Obstetrics and Gynaecology, University Hospital and Medical Faculty of the Heinrich-Heine University Düsseldorf, Düsseldorf, Germany
| | - Paul de Souza
- Centre of Circulating Tumour Cell Diagnostics and Research, Ingham Institute of Applied Medical Research, Liverpool, NSW, Australia
- School of Medicine, Western Sydney University, Campbelltown, NSW, Australia
- South Western Sydney Clinical School, University of New South Wales, Liverpool Hospital, Liverpool, NSW, Australia
| | - Branka Powter
- Centre of Circulating Tumour Cell Diagnostics and Research, Ingham Institute of Applied Medical Research, Liverpool, NSW, Australia
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Novel Approaches to Immunotherapy in Triple Negative Breast Cancer. INTERNATIONAL JOURNAL OF CANCER MANAGEMENT 2018. [DOI: 10.5812/ijcm.87024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Genomics Role in Cancer Immunosurveillance: Impact on Immunotherapy Response. INTERNATIONAL JOURNAL OF CANCER MANAGEMENT 2018. [DOI: 10.5812/ijcm.85552] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Azarnezhad A, Tabrizi M, Atri M, Mehdipour P. ESR1 gene amplification in an Iranian population with early onset invasive ductal breast carcinoma. BREAST CANCER MANAGEMENT 2018. [DOI: 10.2217/bmt-2017-0018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Aim: The study aimed to evaluate a modified SYBR Green qPCR method to study the inter-relations of ESR1 amplification to other parameters including ER expression status, clinicopathological features and responsiveness to tamoxifen. Materials & methods: 35 breast cancer tissues were assessed for ESR1 amplification by a modified qPCR. Results: Amplification of ESR1 was observed in 31.4% out of 35 samples. ESR1 amplification and overexpression were significantly correlated (Spearman's Rho = 0.658; p < 0.001). ESR1 amplification was also statistically associated with positive response to tamoxifen (p = 0.0005), lower tumor grade (p = 0.027) and lower tumor stage (p = 0.005). Conclusion: Findings showed a positive correlation between ER amplification and ER-α expression and highlighted the potential clinical value of using SYBR Green qPCR to quantify amplification of ESR1. ESR1 amplification could be used as an indicator of positive response to tamoxifen and might have a clinicopathological significance. However, the qPCR data should be confirmed by fluorescence in situ hybridization.
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Affiliation(s)
- Asaad Azarnezhad
- Department of Medical Genetics, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Mina Tabrizi
- Department of Medical Genetics, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Morteza Atri
- Department of Surgery, Cancer Institute, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Parvin Mehdipour
- Department of Medical Genetics, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
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Rizzolo P, Navazio AS, Silvestri V, Valentini V, Zelli V, Zanna I, Masala G, Bianchi S, Scarnò M, Tommasi S, Palli D, Ottini L. Somatic alterations of targetable oncogenes are frequently observed in BRCA1/2 mutation negative male breast cancers. Oncotarget 2018; 7:74097-74106. [PMID: 27765917 PMCID: PMC5342038 DOI: 10.18632/oncotarget.12272] [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: 07/02/2016] [Accepted: 09/16/2016] [Indexed: 12/14/2022] Open
Abstract
Male breast cancer (MBC) is a rare disease. Due to its rarity, MBC research and clinical approach are mostly based upon data derived from its largely known female counterpart. We aimed at investigating whether MBC cases harbor somatic alterations of genes known as prognostic biomarkers and molecular therapeutic targets in female breast cancer. We examined 103 MBC cases, all characterized for germ-line BRCA1/2 mutations, for somatic alterations in PIK3CA, EGFR, ESR1 and CCND1 genes. Pathogenic mutations of PIK3CA were detected in 2% of MBCs. No pathogenic mutations were identified in ESR1 and EGFR. Gene copy number variations (CNVs) analysis showed amplification of PIK3CA in 8.1%, EGFR in 6.8% and CCND1 in 16% of MBCs, whereas deletion of ESR1 was detected in 15% of MBCs. Somatic mutations and gene amplification were found only in BRCA1/2 mutation negative MBCs. Significant associations emerged between EGFR amplification and large tumor size (T4), ER-negative and HER2-positive status, between CCND1 amplification and HER2-positive and MIB1-positive status, and between ESR1 deletion and ER-negative status. Our results show that amplification of targetable oncogenes is frequent in BRCA1/2 mutation negative MBCs and may identify MBC subsets characterized by aggressive phenotype that may benefit from potential targeted therapeutic approaches.
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Affiliation(s)
- Piera Rizzolo
- Department of Molecular Medicine, Sapienza University of Rome, Rome, Italy
| | - Anna Sara Navazio
- Department of Molecular Medicine, Sapienza University of Rome, Rome, Italy
| | | | - Virginia Valentini
- Department of Molecular Medicine, Sapienza University of Rome, Rome, Italy
| | - Veronica Zelli
- Department of Molecular Medicine, Sapienza University of Rome, Rome, Italy
| | - Ines Zanna
- Molecular and Nutritional Epidemiology Unit, Cancer Research and Prevention Institute (ISPO), Florence, Italy
| | - Giovanna Masala
- Molecular and Nutritional Epidemiology Unit, Cancer Research and Prevention Institute (ISPO), Florence, Italy
| | - Simonetta Bianchi
- Division of Pathological Anatomy, Department of Medical and Surgical Critical Care, University of Florence, Florence, Italy
| | - Marco Scarnò
- CINECA (Inter University Consortium for Super Computing), Rome, Italy
| | - Stefania Tommasi
- Molecular Genetics Laboratory, Istituto Tumori "Giovanni Paolo II", Bari, Italy
| | - Domenico Palli
- Molecular and Nutritional Epidemiology Unit, Cancer Research and Prevention Institute (ISPO), Florence, Italy
| | - Laura Ottini
- Department of Molecular Medicine, Sapienza University of Rome, Rome, Italy
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Wang H, Yan W, Zhang S, Gu Y, Wang Y, Wei Y, Liu H, Wang F, Wu Q, Zhang Y. Survival differences of CIMP subtypes integrated with CNA information in human breast cancer. Oncotarget 2017; 8:48807-48819. [PMID: 28415743 PMCID: PMC5564726 DOI: 10.18632/oncotarget.16178] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Accepted: 03/01/2017] [Indexed: 12/31/2022] Open
Abstract
CpG island methylator phenotype of breast cancer is associated with widespread aberrant methylation at specified CpG islands and distinct patient outcomes. However, the influence of copy number contributing to the prognosis of tumors with different CpG island methylator phenotypes is still unclear. We analyzed both genetic (copy number) and epigenetic alterations in 765 breast cancers from The Cancer Genome Atlas data portal and got a panel of 15 biomarkers for copy number and methylation status evaluation. The gene panel identified two groups corresponding to distinct copy number profiles. In status of mere-loss copy number, patients were faced with a greater risk if they presented a higher CpG islands methylation pattern in biomarker panels. But for samples presenting merely-gained copy number, higher methylation level of CpG islands was associated with improved viability. In all, the integration of copy number alteration and methylation information enhanced the classification power on prognosis. Moreover, we found the molecular subtypes of breast cancer presented different distributions in two CpG island methylation phenotypes. Generated by the same set of human methylation 450K data, additional copy number information could provide insights into survival prediction of cancers with less heterogeneity and might help to determine the biomarkers for diagnosis and treatment for breast cancer patients in a more personalized approach.
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Affiliation(s)
- Huihan Wang
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, 150081, China
| | - Weili Yan
- School of Life Science and Technology, State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150001, China
| | - Shumei Zhang
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, 150081, China
| | - Yue Gu
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, 150081, China
| | - Yihan Wang
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, 150081, China
| | - Yanjun Wei
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, 150081, China
| | - Hongbo Liu
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, 150081, China
| | - Fang Wang
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, 150081, China
| | - Qiong Wu
- School of Life Science and Technology, State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150001, China
| | - Yan Zhang
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, 150081, China
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Tabarestani S, Motallebi M, Akbari ME. Are Estrogen Receptor Genomic Aberrations Predictive of Hormone Therapy Response in Breast Cancer? IRANIAN JOURNAL OF CANCER PREVENTION 2016; 9:e6565. [PMID: 27761212 PMCID: PMC5056018 DOI: 10.17795/ijcp-6565] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Revised: 05/21/2016] [Accepted: 08/06/2016] [Indexed: 11/25/2022]
Abstract
CONTEXT Breast cancer is the most common cancer in women worldwide. Estrogen receptor (ER) positive breast cancer constitutes the majority of these cancers. Hormone therapy has significantly improved clinical outcomes for early- and late-stage hormone receptor positive breast cancer. Although most patients with early stage breast cancer are treated with curative intent, approximately 20% - 30% of patients eventually experience a recurrence. During the last two decades, there have been tremendous efforts to understand the biological mechanisms of hormone therapy resistance, with the ultimate goal of implementing new therapeutic strategies to improve the current treatments for ER positive breast cancer. Several mechanisms of hormone therapy resistance have been proposed, including genetic alterations that lead to altered ER expression or ERs with changed protein sequence. EVIDENCE ACQUISITION A Pubmed search was performed utilizing various related terms. Articles over the past 20 years were analyzed and selected for review. RESULTS On the basis of published studies, the frequencies of ESR1 (the gene encoding ER) mutations in ER positive metastatic breast cancer range from 11% to 55%. Future larger prospective studies with standardized mutation detection methods may be necessary to determine the true incidence of ESR1 mutations. ESR1 amplification in breast cancer remains a controversial issue, with numerous studies either confirmed or challenged the reports of ESR1 amplification. The combination of intra-tumor heterogeneity regarding ESR1 copy number alterations and low level ESR1 copy number increase may account for these discrepancies. CONCLUSIONS While numerous unknown issues on the role of ESR1 mutations in advanced breast cancer remain, these new findings will certainly deepen current knowledge on molecular evolution of breast cancer and acquired resistance to hormone therapy.
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Affiliation(s)
- Sanaz Tabarestani
- Cancer Research Center, Shahid Beheshti Univeristy of Medical Sciences, Tehran, IR Iran
| | - Marzieh Motallebi
- Cancer Research Center, Shahid Beheshti Univeristy of Medical Sciences, Tehran, IR Iran
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You Y, Li H, Qin X, Zhang Y, Song W, Ran Y, Gao F. Decreased CDK10 expression correlates with lymph node metastasis and predicts poor outcome in breast cancer patients - a short report. Cell Oncol (Dordr) 2015; 38:485-91. [PMID: 26392360 DOI: 10.1007/s13402-015-0246-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/14/2015] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Cyclin-dependent kinase 10 (CDK10) has recently been identified as a tumor suppressor and, concordantly, its encoding gene has frequently been found to be inactivated in various human cancers. Here, we examined the expression status of CDK10 in a panel of primary human breast cancers and evaluated its correlation with clinicopathological parameters and clinical outcome. METHODS Western blotting was used to assess CDK10 protein levels in 20 paired breast cancer tissues and adjacent noncancerous tissues. In addition, immunohistochemistry was performed in 128 formalin-fixed, paraffin-embedded tumor tissues. Associations of CDK10 expression with various clinicopathological parameters were evaluated and Kaplan-Meier survival analyses and Cox proportional hazards models were used to estimate its effect on patient survival. RESULTS We found that CDK10 protein expression was markedly decreased in cancer tissues compared to adjacent noncancerous tissues. Immunohistochemistry revealed decreased CDK10 levels in 65/128 (50.8 %) of the primary breast cancer tissues tested. These decreased levels were found to be significantly associated with lymph node metastasis (P = 0.003), advanced tumor stage (P < 0.001) and unfavorable overall survival (P < 0.001). Furthermore, multivariate analyses indicated that CDK10 expression may serve as an independent prognostic factor for survival (P = 0.001). CONCLUSION Down-regulated CDK10 expression frequently occurs in breast cancers and correlates with disease progression and poor survival. CDK10 may serve as a prognostic biomarker for breast cancer.
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Affiliation(s)
- Yanjie You
- Pathological Examination and Research Center, Luohe Medical College, 148 Daxue-Road, Luohe, 462002, China
- Department of Pharmacy, Luohe Medical College, Luohe, 462002, China
- Luohe Key Laboratory of Medical Bioengineering, Luohe, 462002, China
- Bioengineering Laboratory, Luohe Medical College, Luohe, 462002, China
| | - Haijun Li
- Department of Radiation Oncology, the Second People's Hospital of Neijiang City, Neijaing, 641000, China
| | - Xin Qin
- Medical College, Hubei University of Arts and Science, Xiangyang, 441053, China
| | - Yinpo Zhang
- Pathological Examination and Research Center, Luohe Medical College, 148 Daxue-Road, Luohe, 462002, China
| | - Wengang Song
- Pathological Examination and Research Center, Luohe Medical College, 148 Daxue-Road, Luohe, 462002, China
| | - Yonggang Ran
- Department of Teaching and Training, Bethune Military Medical NCO Academy of PLA, Shijiazhuang, 050081, China
| | - Fenglan Gao
- Pathological Examination and Research Center, Luohe Medical College, 148 Daxue-Road, Luohe, 462002, China.
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Fkih M'hamed I, Privat M, Ponelle F, Penault-Llorca F, Kenani A, Bignon YJ. Identification of miR-10b, miR-26a, miR-146a and miR-153 as potential triple-negative breast cancer biomarkers. Cell Oncol (Dordr) 2015; 38:433-42. [PMID: 26392359 PMCID: PMC4653246 DOI: 10.1007/s13402-015-0239-3] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/13/2015] [Indexed: 12/19/2022] Open
Abstract
Background Familial triple-negative breast cancers are often linked to mutations in the BRCA1 tumor suppressor gene. In sporadic triple-negative breast cancers BRCA1 is frequently inactivated at the transcriptional level, and it has been reported that this inactivation may be brought about by promoter methylation. More recently, it was found that BRCA1 may also be regulated at the post-transcriptional level by miRNAs. Here, we explored the expression of putative BRCA1-regulating miRNAs in sporadic human triple-negative breast cancer cells. Methods Nine sporadic human breast cancer-derived cell lines and one benign breast epithelium-derived cell line were assessed for their hormone receptor, growth factor receptor and cytokeratin status by immunocytochemistry. The expression of 5 selected miRNAs predicted to target BRCA1 was assessed using qRT-PCR in the 10 cell lines. In addition, expression profiles of 84 known breast cancer-associated miRNAs were established in these 10 cell lines using PCR Array and qRT-PCR, respectively. The putative role of pre-selected candidate miRNAs in breast cancer development was assessed through exogenous expression of these miRNAs and their anti-miRNAs (‘antagomirs’) in MDA-MB-231 and MCF7 breast cancer-derived cells. Results Based on our expression profiling results, four candidate miRNAs (miR-10b, miR-26a, miR-146a and miR-153) were selected as being potentially involved in triple-negative breast cancer development. Exogenous expression assays revealed that miR-10b and miR-26a, but not miR-146a, can down-regulate the expression of BRCA1 in both triple-negative MDA-MB-231 and luminal epithelial MCF7 breast cancer-derived cells, whereas miR-153 could down-regulate BRCA1 expression only in MCF7 cells. In silico analysis of The Cancer Genome Atlas (TCGA) data confirmed that miR-146a is significantly higher expressed in triple-negative breast tumors compared to other (non triple-negative) breast tumors. Conclusion Our work provides evidence for the involvement of specific miRNAs in triple-negative breast cancer development through regulating BRCA1 expression. Electronic supplementary material The online version of this article (doi:10.1007/s13402-015-0239-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Insaf Fkih M'hamed
- Département d'Oncogénétique, Centre Jean Perrin, BP 392, 63011, Clermont-Ferrand, France.,EA4677 ERTICA, Université d'Auvergne, Clermont-Ferrand, France.,Faculté de médecine de Monastir, Laboratoire de Biochimie, Unité de recherche UR 12ES08 "Signalisation Cellulaire et Pathologies", 5019, Monastir, Tunisie
| | - Maud Privat
- Département d'Oncogénétique, Centre Jean Perrin, BP 392, 63011, Clermont-Ferrand, France.,EA4677 ERTICA, Université d'Auvergne, Clermont-Ferrand, France
| | - Flora Ponelle
- Département d'Oncogénétique, Centre Jean Perrin, BP 392, 63011, Clermont-Ferrand, France.,EA4677 ERTICA, Université d'Auvergne, Clermont-Ferrand, France
| | | | - Abderraouf Kenani
- Faculté de médecine de Monastir, Laboratoire de Biochimie, Unité de recherche UR 12ES08 "Signalisation Cellulaire et Pathologies", 5019, Monastir, Tunisie
| | - Yves-Jean Bignon
- Département d'Oncogénétique, Centre Jean Perrin, BP 392, 63011, Clermont-Ferrand, France. .,EA4677 ERTICA, Université d'Auvergne, Clermont-Ferrand, France.
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Abstract
Cyclin D1 binds and activates cyclin-dependent kinases 4/6 (Cdk4/6) to phosphorylate the retinoblastoma (RB) family proteins, relieving E2F/DPs from the negative restraint of RB proteins and histone deacetylases. The cyclin D-Cdk4/6 complexes activate cyclin E/Cdk2 through titration of the Cdk inhibitors p21Cip1/p27Kip1. Cyclin E/Cdk2 further phosphorylates RBs, thereby activating E2F/DPs, and cells enter the S phase of the cell cycle. Cyclin D-Cdk4/6 also phosphorylates MEP50 subunit of the protein arginine methyltransferase 5 (PRMT5), which cooperates with cyclin D1 to drive lymphomagenesis in vivo. Activated PRMPT5 causes arginine methylation of p53 to suppress expression of pro-apoptotic and anti-proliferative target genes, explaining the molecular mechanism for tumorigenesis. Cyclin D1 physically interacts with transcription factors such as estrogen receptor, androgen receptor, and Myb family proteins to regulate gene expression in Cdk-independent fashion. Dmp1 is a Myb-like protein that quenches the oncogenic signals from activated Ras or HER2 by inducing Arf/p53-dependent cell cycle arrest. Cyclin D1 binds to Dmp1α to activate both Arf and Ink4a promoters to induce cell cycle arrest or apoptosis in non-transformed cells to prevent them from neoplastic transformation. Dmp1-deficiency significantly accelerates mouse mammary tumorigenesis with reduced apoptosis and increased metastasis. Cyclin D1 interferes with ligand activation of PPARγ involved in cellular differentiation; it also physically interacts with histone deacetylases (HDACs) and p300 to repress gene expression. It has also been shown that cyclin D1 accelerates tumorigenesis through transcriptional activation of miR-17/20 and Dicer1 which, in turn, represses cyclin D1 expression. Identification of cyclin D1-binding proteins/promoters will be essential for further clarification of its biological activities.
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Affiliation(s)
- Kazushi Inoue
- Department of Pathology, Wake Forest University Health Sciences, Medical Center Boulevard, Winston-Salem, NC 27157 USA
| | - Elizabeth A Fry
- Department of Pathology, Wake Forest University Health Sciences, Medical Center Boulevard, Winston-Salem, NC 27157 USA
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Lacle MM, Moelans CB, Kornegoor R, van der Pol C, Witkamp AJ, van der Wall E, Rueschoff J, Buerger H, van Diest PJ. Chromosome 17 copy number changes in male breast cancer. Cell Oncol (Dordr) 2015; 38:237-45. [PMID: 25906114 PMCID: PMC4445249 DOI: 10.1007/s13402-015-0227-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/01/2015] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND Overall, HER2-amplified female breast cancer (FBC) is associated with a high grade, an aggressive phenotype and a poor prognosis. In male breast cancer (MBC) amplification of HER2, located on chromosome 17, occurs at a lower frequency than in FBC, where it is part of complex rearrangements. So far, only few studies have addressed the occurrence of chromosome 17 alterations in small MBC cohorts. METHODS Multiplex ligation-dependent probe amplification (MLPA) and fluorescence in situ hybridization (FISH) were used to detect and characterize copy number changes on chromosome 17 in a cohort of 139 MBC. The results obtained were compared to those in FBC, and were correlated with clinicopathological features and patient outcome data. RESULTS We observed a lower frequency of chromosome 17 copy number changes with less complex rearrangement patterns in MBC compared to FBC. Chromosome 17 changes in MBC included gains of 17q and losses of 17p. Whole chromosome 17 polyploidies were not encountered. Two recurrent chromosome 17 amplicons were detected: on 17q12 (encompassing the NEUROD2, HER2, GRB7 and IKZF3 gens) and on 17q23.1 (encompassing the MIR21 and RPS6KB1 genes). Whole arm copy number gains of 17q were associated with decreased 5 year survival rates (p = 0.010). Amplification of HER2 was associated with a high tumor grade, but did not predict patient survival. Although copy number gains of HER2 and NEUROD2 were associated with a high tumor grade, a high mitotic count and a decreased 5 year survival rate (p = 0.015), only tumor size and NEUROD2 copy number gains emerged as independent prognostic factors. CONCLUSIONS In MBC chromosome 17 shows less complex rearrangements and fewer copy number changes compared to FBC. Frequent gains of 17q, encompassing two distinct amplicons, and losses of 17p were observed, but no whole chromosome 17 polyploidies. Only NEUROD2 gains seem to have an independent prognostic impact. These results suggest different roles of chromosome 17 aberrations in male versus female breast carcinogenesis.
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Affiliation(s)
- Miangela M. Lacle
- />Department of Pathology, University Medical Center Utrecht, PO Box 85500, 3508 GA Utrecht, The Netherlands
| | - Cathy B. Moelans
- />Department of Pathology, University Medical Center Utrecht, PO Box 85500, 3508 GA Utrecht, The Netherlands
| | - Robert Kornegoor
- />Department of Pathology, University Medical Center Utrecht, PO Box 85500, 3508 GA Utrecht, The Netherlands
| | - Carmen van der Pol
- />Department of Surgery, University Medical Center, Utrecht, The Netherlands
| | - Arjen J. Witkamp
- />Department of Surgery, University Medical Center, Utrecht, The Netherlands
| | - Elsken van der Wall
- />Department of Division of Oncology, University Medical Center, Utrecht, The Netherlands
| | | | - Horst Buerger
- />Institute of Pathology Paderborn/Höxter and Brustzentrum, Paderborn, Germany
| | - Paul J. van Diest
- />Department of Pathology, University Medical Center Utrecht, PO Box 85500, 3508 GA Utrecht, The Netherlands
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Papanikolaou V, Stefanou N, Dubos S, Papathanasiou I, Palianopoulou M, Valiakou V, Tsezou A. Synergy of leptin/STAT3 with HER2 receptor induces tamoxifen resistance in breast cancer cells through regulation of apoptosis-related genes. Cell Oncol (Dordr) 2014; 38:155-64. [PMID: 25539992 DOI: 10.1007/s13402-014-0213-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/12/2014] [Indexed: 01/09/2023] Open
Abstract
PURPOSE Tamoxifen is a major treatment modality for estrogen receptor positive breast cancer, but the occurrence of resistance remains a problem. Recently, obesity-related leptin has been found to interfere with tamoxifen in breast cancer MCF-7 cells. In the present study we investigated the effect of leptin on three tamoxifen-treated breast cancer cell types (i.e., MDA-MB-231, MCF-7 and MCF-7/HER2). METHODS The effect of tamoxifen/leptin treatment was evaluated using a MTT cell viability assay. mRNA expression was assessed by real time PCR and protein expression by Western blotting. WWOX, Survivin and BCL2 gene promoter activities were evaluated by chromatin immunoprecipitation. RESULTS Cell viability assays revealed that estrogen receptor negative MDA-MB-231 cells were resistant, that estrogen receptor positive MCF-7 cells were sensitive and that MCF-7/HER2 cells were relatively resistant to tamoxifen, while leptin co-administration 'rescued' MCF-7 and, especially, MCF-7/HER2 cells from the anti-proliferative effect of tamoxifen. The cell lines also exhibited a different phosphorylation status of STAT3, a transcription factor that is activated by the obesity related leptin receptor b (Ob-Rb). Most importantly, chromatin immunoprecipitation assays revealed differential STAT3 binding to the anti-apoptotic BCL2 and pro-apoptotic WWOX gene promoters in MCF-7 and MCF-7/HER2 cells, leading to concomitant modifications of its mRNA/protein expression levels, thus providing a selective advantage to HER2 over-expressing MCF-7/HER2 cells after treatment with tamoxifen and tamoxifen plus leptin. CONCLUSIONS Our study provides novel evidence indicating that synergy between the leptin/Ob-Rb/STAT3 signalling pathway and the HER2 receptor protects tamoxifen-treated HER2 over-expressing cells from the inhibitory effect of tamoxifen through differential regulation of apoptosis-related genes.
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Affiliation(s)
- Vassilis Papanikolaou
- Department of Biomedical Research and Technology, Institute for Research and Technology-Thessaly (I.RE.TE.TH), Centre for Research and Technology-Hellas (CE.R.T.H.), Larissa, 41222, Greece
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Rawat A, Gopisetty G, Thangarajan R. E4BP4 is a repressor of epigenetically regulated SOSTDC1 expression in breast cancer cells. Cell Oncol (Dordr) 2014; 37:409-19. [DOI: 10.1007/s13402-014-0204-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/14/2014] [Indexed: 01/15/2023] Open
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