1
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Zhang D, Chen H, Wang J, Ji J, Imam M, Zhang Z, Yan S. Current progress and prospects for G protein-coupled estrogen receptor in triple-negative breast cancer. Front Cell Dev Biol 2024; 12:1338448. [PMID: 38476263 PMCID: PMC10928007 DOI: 10.3389/fcell.2024.1338448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Accepted: 02/08/2024] [Indexed: 03/14/2024] Open
Abstract
Triple-negative breast cancer (TNBC) is a biologically and clinically heterogeneous disease. The G protein-coupled estrogen receptor (GPER) plays a crucial role in mediating the effect of estrogen and estrogen-like compounds in TNBC cells. Compared with other subtypes, GPER has a higher expression in TNBC. The GPER mechanisms have been thoroughly characterized and analyzed in estrogen receptor α (ERα) positive breast cancer, but not in TNBC. Our previous work revealed that a higher expression of GPER mRNA indicates a better prognosis for ERα-positive breast cancer; however, its effects in TNBC differ. Whether GPER could serve as a predictive prognostic marker or therapeutic target for TNBC remains unclear. In this review, we provide a detailed introduction to the subcellular localization of GPER, the different effects of various ligands, and the interactions between GPER and closely associated factors in TNBC. We focused on the internal molecular mechanisms specific to TNBC and thoroughly explored the role of GPER in promoting tumor development. We also discussed the interaction of GPER with specific cytokines and chemokines, and the relationship between GPER and immune evasion. Additionally, we discussed the feasibility of using GPER as a therapeutic target in the context of existing studies. This comprehensive review highlights the effects of GPER on TNBC, providing a framework and directions for future research.
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Affiliation(s)
| | | | | | | | | | | | - Shunchao Yan
- Department of Oncology, Shengjing Hospital of China Medical University, Shenyang, China
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2
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Kurozumi S, Seki N, Narusawa E, Honda C, Tokuda S, Nakazawa Y, Yokobori T, Katayama A, Mongan NP, Rakha EA, Oyama T, Fujii T, Shirabe K, Horiguchi J. Identification of MicroRNAs Associated with Histological Grade in Early-Stage Invasive Breast Cancer. Int J Mol Sci 2023; 25:35. [PMID: 38203206 PMCID: PMC10779190 DOI: 10.3390/ijms25010035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 12/11/2023] [Accepted: 12/13/2023] [Indexed: 01/12/2024] Open
Abstract
This study aimed to identify microRNAs associated with histological grade using comprehensive microRNA analysis data obtained by next-generation sequencing from early-stage invasive breast cancer. RNA-seq data from normal breast and breast cancer samples were compared to identify candidate microRNAs with differential expression using bioinformatics. A total of 108 microRNAs were significantly differentially expressed in normal breast and breast cancer tissues. Using clinicopathological information and microRNA sequencing data of 430 patients with breast cancer from The Cancer Genome Atlas (TCGA), the differences in candidate microRNAs between low- and high-grade tumors were identified. Comparing the expression of the 108 microRNAs between low- and high-grade cases, 25 and 18 microRNAs were significantly upregulated and downregulated, respectively, in high-grade cases. Clustering analysis of the TCGA cohort using these 43 microRNAs identified two groups strongly predictive of histological grade. miR-3677 is a microRNA upregulated in high-grade breast cancer. The outcome analysis revealed that patients with high miR-3677 expression had significantly worse prognosis than those with low miR-3677 expression. This study shows that microRNAs are associated with histological grade in early-stage invasive breast cancer. These findings contribute to the elucidation of a new mechanism of breast cancer growth regulated by specific microRNAs.
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Affiliation(s)
- Sasagu Kurozumi
- Department of Breast Surgery, International University of Health and Welfare, Chiba 286-8520, Japan
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Gunma 371-8511, Japan (T.F.)
| | - Naohiko Seki
- Department of Functional Genomics, Chiba University Graduate School of Medicine, Chiba 260-8670, Japan;
| | - Eriko Narusawa
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Gunma 371-8511, Japan (T.F.)
| | - Chikako Honda
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Gunma 371-8511, Japan (T.F.)
| | - Shoko Tokuda
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Gunma 371-8511, Japan (T.F.)
| | - Yuko Nakazawa
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Gunma 371-8511, Japan (T.F.)
| | - Takehiko Yokobori
- Initiative for Advanced Research, Gunma University, Gunma 371-8511, Japan
| | - Ayaka Katayama
- Department of Diagnostic Pathology, Gunma University Graduate School of Medicine, Gunma 371-8511, Japan (T.O.)
| | - Nigel P. Mongan
- Biodiscovery Institute, Faculty of Medicine and Health Sciences, University of Nottingham, Nottingham NG7 2RD, UK
| | - Emad A. Rakha
- Academic Unit for Translational Medical Sciences, School of Medicine, University of Nottingham, Nottingham NG7 2RD, UK
- Pathology Department, Hamad Medical Corporation, Doha P.O. Box 3050, Qatar
| | - Tetsunari Oyama
- Department of Diagnostic Pathology, Gunma University Graduate School of Medicine, Gunma 371-8511, Japan (T.O.)
| | - Takaaki Fujii
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Gunma 371-8511, Japan (T.F.)
| | - Ken Shirabe
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Gunma 371-8511, Japan (T.F.)
| | - Jun Horiguchi
- Department of Breast Surgery, International University of Health and Welfare, Chiba 286-8520, Japan
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3
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Dabbs DJ, Huang RS, Ross JS. Novel markers in breast pathology. Histopathology 2023; 82:119-139. [PMID: 36468266 DOI: 10.1111/his.14770] [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: 06/27/2022] [Revised: 08/07/2022] [Accepted: 08/08/2022] [Indexed: 12/12/2022]
Abstract
Breast pathology is an ever-expanding database of information which includes markers, or biomarkers, that detect or help treat the disease as prognostic or predictive information. This review focuses on these aspects of biomarkers which are grounded in immunohistochemistry, liquid biopsies and next-generation sequencing.
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Affiliation(s)
- David J Dabbs
- PreludeDx, Laguna Hills, CA, USA.,Department of Pathology, University of Pittsburgh, Board Member, CASI (Consortium for Analytical Standardization in Immunohistochemistry), Pittsburgh, PA, USA
| | - Richard S Huang
- Clinical Development, Foundation Medicine, Cambridge, MA, USA
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4
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Yu G, Chen Y, Hu Y, Zhou Y, Ding X, Zhou X. Roles of transducin-like enhancer of split (TLE) family proteins in tumorigenesis and immune regulation. Front Cell Dev Biol 2022; 10:1010639. [PMID: 36438567 PMCID: PMC9692235 DOI: 10.3389/fcell.2022.1010639] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Accepted: 10/31/2022] [Indexed: 08/16/2023] Open
Abstract
Mammalian transducin-like enhancer of split family proteins (TLEs) are homologous to Drosophila Groucho (Gro) and are essential transcriptional repressors. Seven TLE family members, TLE1-7, have been identified to date. These proteins do not bind DNA directly; instead, they bind a set of transcription factors and thereby inhibit target gene expression. Loss of TLEs in mice usually leads to defective early development; however, TLE functions in developmentally mature cells are unclear. Recent studies have revealed that TLEs are dysregulated in certain human cancer types and may function as oncogenes or tumor suppressors in different contexts. TLE levels also affect the efficacy of cancer treatments and the development of drug resistance. In addition, TLEs play critical roles in the development and function of immune cells, including macrophages and lymphocytes. In this review, we provide updates on the expression, function, and mechanism of TLEs; discuss the roles played by TLEs in tumorigenesis and the inflammatory response; and elaborate on several TLE-associated signaling pathways, including the Notch, Wnt, and MAPK pathways. Finally, we discuss potential strategies for targeting TLEs in cancer therapy.
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Affiliation(s)
- Guiping Yu
- Department of Immunology, Nantong University, School of Medicine, Nantong, China
- Department of Cardiothoracic Surgery, The Affiliated Jiangyin Hospital of Nantong University, Jiangyin, China
| | - Yiqi Chen
- Department of Immunology, Nantong University, School of Medicine, Nantong, China
| | - Yuwen Hu
- Department of Immunology, Nantong University, School of Medicine, Nantong, China
| | - Yan Zhou
- Department of Periodontology, The Affiliated Nantong Stomatological Hospital of Nantong University, Nantong, China
| | - Xiaoling Ding
- Department of Gastroenterology, The Affiliated Hospital of Nantong University, Nantong, China
| | - Xiaorong Zhou
- Department of Immunology, Nantong University, School of Medicine, Nantong, China
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5
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Pavanelli AC, Mangone FR, Yoganathan P, Bessa SA, Nonogaki S, de Toledo Osório CAB, de Andrade VP, Soares IC, de Mello ES, Mulligan LM, Nagai MA. Comprehensive immunohistochemical analysis of RET, BCAR1, and BCAR3 expression in patients with Luminal A and B breast cancer subtypes. Breast Cancer Res Treat 2022; 192:43-52. [PMID: 35031902 DOI: 10.1007/s10549-021-06452-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Accepted: 11/14/2021] [Indexed: 12/19/2022]
Abstract
PURPOSE Breast cancer (BC) is considered a heterogeneous disease composed of distinct subtypes with diverse clinical outcomes. Luminal subtype tumors have the best prognosis, and patients benefit from endocrine therapy. However, resistance to endocrine therapies in BC is an obstacle to successful treatment, and novel biomarkers are needed to understand and overcome this mechanism. The RET, BCAR1, and BCAR3 genes may be associated with BC progression and endocrine resistance. METHODS Aiming to evaluate the expression profile and prognostic value of RET, BCAR1, and BCAR3, we performed immunohistochemistry on tissue microarrays (TMAs) containing a cohort of 361 Luminal subtype BC. RESULTS Low expression levels of these three proteins were predominantly observed. BCAR1 expression was correlated with nuclear grade (p = 0.057), and BCAR3 expression was correlated with lymph node status (p = 0.011) and response to hormonal therapy (p = 0.021). Further, low expression of either BCAR1 or BCAR3 was significantly associated with poor prognosis (p = 0.005; p = 0.042). Pairwise analysis showed that patients with tumors with low BCAR1/low BCAR3 expression had a poorer overall survival (p = 0.013), and the low BCAR3 expression had the worst prognosis with RET high expression stratifying these patients into two different groups. Regarding the response to hormonal therapy, non-responder patients presented lower expression of RET in comparison to the responder group (p = 0.035). Additionally, the low BCAR1 expression patients had poorer outcomes than BCAR1 high (p = 0.015). CONCLUSION Our findings suggest RET, BCAR1, and BCAR3 as potential candidate markers for endocrine therapy resistance in Luminal BC.
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Affiliation(s)
- Ana Carolina Pavanelli
- Discipline of Oncology, Department of Radiology and Oncology, Faculty of Medicine, University of São Paulo, São Paulo, 01246-903, Brazil
- Laboratory of Molecular Genetics, Center for Translational Research in Oncology, Cancer Institute of Sao Paulo, São Paulo, 01246-000, Brazil
| | - Flavia Rotea Mangone
- Discipline of Oncology, Department of Radiology and Oncology, Faculty of Medicine, University of São Paulo, São Paulo, 01246-903, Brazil
- Laboratory of Molecular Genetics, Center for Translational Research in Oncology, Cancer Institute of Sao Paulo, São Paulo, 01246-000, Brazil
| | - Piriya Yoganathan
- Department of Pathology and Molecular Medicine, Cancer Research Institute, Queen's University Kingston, 18 Stuart Street, Kingston, ON, K7L 3N6, Canada
| | - Simone Aparecida Bessa
- Discipline of Oncology, Department of Radiology and Oncology, Faculty of Medicine, University of São Paulo, São Paulo, 01246-903, Brazil
- Laboratory of Molecular Genetics, Center for Translational Research in Oncology, Cancer Institute of Sao Paulo, São Paulo, 01246-000, Brazil
| | - Suely Nonogaki
- Department of Pathological Anatomy, A. C. Camargo Cancer Center, São Paulo, 01509-020, Brazil
| | | | - Victor Piana de Andrade
- Department of Pathological Anatomy, A. C. Camargo Cancer Center, São Paulo, 01509-020, Brazil
| | - Iberê Cauduro Soares
- Department of Pathology, Cancer Institute of Sao Paulo, Hospital das Clinicas, Faculty of Medicine, University of São Paulo, HCFMUSP, São Paulo, 01246-903, Brazil
| | - Evandro Sobrosa de Mello
- Department of Pathology, Cancer Institute of Sao Paulo, Hospital das Clinicas, Faculty of Medicine, University of São Paulo, HCFMUSP, São Paulo, 01246-903, Brazil
| | - Lois M Mulligan
- Department of Pathology and Molecular Medicine, Cancer Research Institute, Queen's University Kingston, 18 Stuart Street, Kingston, ON, K7L 3N6, Canada
| | - Maria Aparecida Nagai
- Discipline of Oncology, Department of Radiology and Oncology, Faculty of Medicine, University of São Paulo, São Paulo, 01246-903, Brazil.
- Laboratory of Molecular Genetics, Center for Translational Research in Oncology, Cancer Institute of Sao Paulo, São Paulo, 01246-000, Brazil.
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6
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Zhang Z, Wang Y, Wang Y, Wang C, Shuai Y, Luo J, Liu R. BCAR3 promotes head and neck cancer growth and is associated with poor prognosis. Cell Death Discov 2021; 7:316. [PMID: 34707118 PMCID: PMC8551282 DOI: 10.1038/s41420-021-00714-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Accepted: 10/14/2021] [Indexed: 01/15/2023] Open
Abstract
Breast cancer anti-estrogen resistance protein 3 (BCAR3) is involved in anti-estrogen resistance and other important aspects of breast cancer. However, the role of BCAR3 in other solid tumors remains unclear. The relationship between the clinicopathologic characteristics of head and neck squamous cell carcinoma (HNSCC) patients and BCAR3 was analyzed using the Wilcoxon’s signed-rank test and logistic regression. The association between BCAR3 expression and clinicopathologic features and survival was analyzed using Cox regression and the Kaplan–Meier method. In vivo and in vitro assays were performed to validate the effect of BCAR3 on HNSCC growth. BCAR3-related mRNAs were determined by calculating the Pearson’s correlation coefficient based on The Cancer Genome Atlas (TCGA). Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analyses, and gene set enrichment analysis (GSEA) were used to predict the potential functions of BCAR3. BCAR3 expression is overexpressed in HNSCC and was shown to be associated with perineural invasion (PNI) and poor survival. BCAR3 silencing significantly attenuated the proliferation of HNSCC cells, whereas BCAR3 depletion inhibited tumor growth in vitro. GO and KEGG functional enrichment analyses, and GSEA showed that BCAR3 expression in HNSCC was associated with biological processes, such as cell adhesion, actin binding, cadherin binding, and angiogenesis. BCAR3, which promotes HNSCC growth, is associated with perineural invasion and may be a potential molecular prognostic marker of poor survival in HNSCC.
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Affiliation(s)
- Ze Zhang
- Department of Maxillofacial and Otorhinolaryngology Oncology, and Department of Head and Neck Oncology, Tianjin Medical University Cancer Institute and Hospital, Tianjin, 300060, China.,Key Laboratory of Cancer Prevention and Therapy, National Clinical Research Center for Cancer, Tianjin, 300060, China.,Tianjin's Clinical Research Center for Cancer, Tianjin, 300060, China
| | - Yafei Wang
- Department of Maxillofacial and Otorhinolaryngology Oncology, and Department of Head and Neck Oncology, Tianjin Medical University Cancer Institute and Hospital, Tianjin, 300060, China.,Key Laboratory of Cancer Prevention and Therapy, National Clinical Research Center for Cancer, Tianjin, 300060, China.,Tianjin's Clinical Research Center for Cancer, Tianjin, 300060, China
| | - Yun Wang
- Department of Maxillofacial and Otorhinolaryngology Oncology, and Department of Head and Neck Oncology, Tianjin Medical University Cancer Institute and Hospital, Tianjin, 300060, China.,Key Laboratory of Cancer Prevention and Therapy, National Clinical Research Center for Cancer, Tianjin, 300060, China.,Tianjin's Clinical Research Center for Cancer, Tianjin, 300060, China
| | - Chunli Wang
- Department of Maxillofacial and Otorhinolaryngology Oncology, and Department of Head and Neck Oncology, Tianjin Medical University Cancer Institute and Hospital, Tianjin, 300060, China.,Key Laboratory of Cancer Prevention and Therapy, National Clinical Research Center for Cancer, Tianjin, 300060, China.,Tianjin's Clinical Research Center for Cancer, Tianjin, 300060, China
| | - Yanjie Shuai
- Department of Maxillofacial and Otorhinolaryngology Oncology, and Department of Head and Neck Oncology, Tianjin Medical University Cancer Institute and Hospital, Tianjin, 300060, China.,Key Laboratory of Cancer Prevention and Therapy, National Clinical Research Center for Cancer, Tianjin, 300060, China.,Tianjin's Clinical Research Center for Cancer, Tianjin, 300060, China
| | - Jingtao Luo
- Department of Maxillofacial and Otorhinolaryngology Oncology, and Department of Head and Neck Oncology, Tianjin Medical University Cancer Institute and Hospital, Tianjin, 300060, China. .,Key Laboratory of Cancer Prevention and Therapy, National Clinical Research Center for Cancer, Tianjin, 300060, China. .,Tianjin's Clinical Research Center for Cancer, Tianjin, 300060, China.
| | - Ruoyan Liu
- Key Laboratory of Cancer Prevention and Therapy, National Clinical Research Center for Cancer, Tianjin, 300060, China. .,Tianjin's Clinical Research Center for Cancer, Tianjin, 300060, China. .,Department of Gynaecological Oncology, Tianjin Medical University Cancer Institute and Hospital, Tianjin, 300060, China.
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7
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Loo SY, Syn NL, Koh APF, Teng JCF, Deivasigamani A, Tan TZ, Thike AA, Vali S, Kapoor S, Wang X, Wang JW, Tan PH, Yip GW, Sethi G, Huang RYJ, Hui KM, Wang L, Goh BC, Kumar AP. Epigenetic derepression converts PPARγ into a druggable target in triple-negative and endocrine-resistant breast cancers. Cell Death Discov 2021; 7:265. [PMID: 34580286 PMCID: PMC8476547 DOI: 10.1038/s41420-021-00635-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 08/23/2021] [Accepted: 09/03/2021] [Indexed: 01/04/2023] Open
Abstract
Clinical trials repurposing peroxisome proliferator-activated receptor-gamma (PPARγ) agonists as anticancer agents have exhibited lackluster efficacy across a variety of tumor types. Here, we report that increased PPARG expression is associated with a better prognosis but is anticorrelated with histone deacetylase (HDAC) 1 and 2 expressions. We show that HDAC overexpression blunts anti-proliferative and anti-angiogenic responses to PPARγ agonists via transcriptional and post-translational mechanisms, however, these can be neutralized with clinically approved and experimental HDAC inhibitors. Supporting this notion, concomitant treatment with HDAC inhibitors was required to license the tumor-suppressive effects of PPARγ agonists in triple-negative and endocrine-refractory breast cancer cells, and combination therapy also restrained angiogenesis in a tube formation assay. This combination was also synergistic in estrogen receptor-alpha (ERα)-positive cells because HDAC blockade abrogated ERα interference with PPARγ-regulated transcription. Following a pharmacokinetics optimization study, the combination of rosiglitazone and a potent pan-HDAC inhibitor, LBH589, stalled disease progression in a mouse model of triple-negative breast cancer greater than either of the monotherapies, while exhibiting a favorable safety profile. Our findings account for historical observations of de-novo resistance to PPARγ agonist monotherapy and propound a therapeutically cogent intervention against two aggressive breast cancer subtypes.
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Affiliation(s)
- Ser Yue Loo
- Cancer Science Institute of Singapore and Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.,Genome Institute of Singapore, A*STAR, Singapore, Singapore
| | - Nicholas L Syn
- Department of Haematology-Oncology, National University Cancer Institute, Singapore, Singapore.,Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Angele Pei-Fern Koh
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, Singapore
| | - Janet Cheng-Fei Teng
- Department of Anatomy, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Amudha Deivasigamani
- Division of Cellular and Molecular Research, National Cancer Centre Singapore, Singapore, Singapore
| | - Tuan Zea Tan
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, Singapore
| | - Aye Aye Thike
- Department of Pathology, Singapore General Hospital, Singapore, Singapore
| | - Shireen Vali
- Cellworks Research India Pvt. Ltd., Bengaluru, India
| | - Shweta Kapoor
- Cellworks Research India Pvt. Ltd., Bengaluru, India
| | - Xiaoyuan Wang
- Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.,Cardiovascular Research Institute (CVRI), National University Heart Centre, Singapore (NUHCS), National University Health System, Singapore, Singapore
| | - Jiong Wei Wang
- Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.,Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Puay Hoon Tan
- Department of Pathology, Singapore General Hospital, Singapore, Singapore
| | - George W Yip
- Department of Anatomy, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Gautam Sethi
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Ruby Yun-Ju Huang
- School of Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Kam Man Hui
- Division of Cellular and Molecular Research, National Cancer Centre Singapore, Singapore, Singapore
| | - Lingzhi Wang
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, Singapore
| | - Boon Cher Goh
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, Singapore.,Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.,NUS Centre for Cancer Research (N2CR), Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.,National University Cancer Institute, National University Health System, Singapore, Singapore.,Department of Haematology-Oncology, National University Hospital, National University Health System, Singapore, Singapore
| | - Alan Prem Kumar
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, Singapore. .,NUS Centre for Cancer Research (N2CR), Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore. .,National University Cancer Institute, National University Health System, Singapore, Singapore.
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8
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Ortiz MA, Mikhailova T, Li X, Porter BA, Bah A, Kotula L. Src family kinases, adaptor proteins and the actin cytoskeleton in epithelial-to-mesenchymal transition. Cell Commun Signal 2021; 19:67. [PMID: 34193161 PMCID: PMC8247114 DOI: 10.1186/s12964-021-00750-x] [Citation(s) in RCA: 48] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Accepted: 05/14/2021] [Indexed: 12/20/2022] Open
Abstract
Over a century of scientific inquiry since the discovery of v-SRC but still no final judgement on SRC function. However, a significant body of work has defined Src family kinases as key players in tumor progression, invasion and metastasis in human cancer. With the ever-growing evidence supporting the role of epithelial-mesenchymal transition (EMT) in invasion and metastasis, so does our understanding of the role SFKs play in mediating these processes. Here we describe some key mechanisms through which Src family kinases play critical role in epithelial homeostasis and how their function is essential for the propagation of invasive signals. Video abstract.
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Affiliation(s)
- Maria A Ortiz
- Department of Biochemistry and Molecular Biology, SUNY Upstate Medical University, Syracuse, USA.,Department of Urology, SUNY Upstate Medical University, Syracuse, USA
| | - Tatiana Mikhailova
- Department of Biochemistry and Molecular Biology, SUNY Upstate Medical University, Syracuse, USA
| | - Xiang Li
- Department of Biochemistry and Molecular Biology, SUNY Upstate Medical University, Syracuse, USA.,Department of Urology, SUNY Upstate Medical University, Syracuse, USA
| | - Baylee A Porter
- Department of Biochemistry and Molecular Biology, SUNY Upstate Medical University, Syracuse, USA.,Department of Urology, SUNY Upstate Medical University, Syracuse, USA
| | - Alaji Bah
- Department of Biochemistry and Molecular Biology, SUNY Upstate Medical University, Syracuse, USA
| | - Leszek Kotula
- Department of Biochemistry and Molecular Biology, SUNY Upstate Medical University, Syracuse, USA. .,Department of Urology, SUNY Upstate Medical University, Syracuse, USA.
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9
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Wang MQ, Zhu WJ, Gao P. New insights into long non-coding RNAs in breast cancer: Biological functions and therapeutic prospects. Exp Mol Pathol 2021; 120:104640. [PMID: 33878314 DOI: 10.1016/j.yexmp.2021.104640] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 03/24/2021] [Accepted: 04/16/2021] [Indexed: 11/29/2022]
Abstract
Breast cancer (BC) has become one of the most common malignant tumors in the world, seriously endangering women's health and life. However, the underlying molecular mechanisms of BC remain unclear. Over the past decade, long non-coding RNAs (lncRNAs) were gradually discovered and appreciated to play pivotal regulatory role in the progression of BC. It has been demonstrated that lncRNAs are implicated in regulating plenty of biological phenomena including cell proliferation, apoptosis, invasion and metastasis by interacting with DNA, RNA or proteins. In addition to these, the function of lncRNAs in tumor resistance has increasingly attracted more attention. In this review, we summarized the emerging impact of lncRNAs on the occurrence and progression of human BC, specifically focusing on the functions and mechanisms of them, with the aim of exploring the potential value of lncRNAs as oncogenic drivers or tumor suppressors. Furthermore, the potential clinical application of lncRNAs as diagnostic biomarkers and therapeutic targets in BC was also discussed.
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Affiliation(s)
- Meng-Qi Wang
- Key Laboratory for Experimental Teratology of Ministry of Education, Department of Pathology, School of Basic Medical Sciences, CheeLoo College of Medicine, Shandong University, Jinan, Shandong 250012, China; Department of Pathology, Qilu Hospital, Shandong University, Jinan, Shandong 250012, China
| | - Wen-Jie Zhu
- Key Laboratory for Experimental Teratology of Ministry of Education, Department of Pathology, School of Basic Medical Sciences, CheeLoo College of Medicine, Shandong University, Jinan, Shandong 250012, China; Department of Pathology, Qilu Hospital, Shandong University, Jinan, Shandong 250012, China.
| | - Peng Gao
- Key Laboratory for Experimental Teratology of Ministry of Education, Department of Pathology, School of Basic Medical Sciences, CheeLoo College of Medicine, Shandong University, Jinan, Shandong 250012, China; Department of Pathology, Qilu Hospital, Shandong University, Jinan, Shandong 250012, China.
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10
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Li M, Du M, Cong H, Gu Y, Fang Y, Li J, Gan Y, Tu H, Gu J, Xia Q. Characterization of hepatitis B virus DNA integration patterns in intrahepatic cholangiocarcinoma. Hepatol Res 2021; 51:102-115. [PMID: 33037855 DOI: 10.1111/hepr.13580] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 09/19/2020] [Accepted: 09/24/2020] [Indexed: 12/13/2022]
Abstract
AIM Hepatitis B virus (HBV) integration is one of the mechanisms contributing to hepatocellular carcinoma (HCC) development. However, the status of HBV integration in intrahepatic cholangiocarcinoma (ICC) is poorly understood. This study aims to characterize the viral integration in HBV-related ICC. METHODS The presence of HBV S and C gene in ICCs and the paratumor tissue was determined by polymerase chain reaction direct sequencing. Hepatitis B virus integration was detected by a high-throughput capture sequencing method. The expression analysis of the genes targeted by HBV in ICC was undertaken in The Cancer Genome Atlas dataset. RESULTS Hepatitis B virus S and/or C gene fragments were detected in 71.43% (10/14) ICCs and 57.14% (8/14) paratumor tissues. Using the high-throughput capture sequencing approach, 139 and 183 HBV integration breakpoints were identified from seven ICC and seven paired paratumor tissues, respectively. Seven genes (TERT, CEACAM20, SPATA18, TRERF1, ZNF23, LINC01449, and LINC00486) were recurrently targeted by HBV-DNA in different ICC tissues or different cell populations of the same tissue. TERT, which is the most preferential HBV target gene in HCC, was found to be repeatedly interrupted by HBV-DNA in three different ICC tissues. Based on The Cancer Genome Atlas dataset, TERT, as well as three other HBV recurrently targeted genes (SPATA18, TRERF1, and ZNF23), showed differential expression levels between ICC and para-ICC tissues. CONCLUSIONS Taken together, HBV integration is a common event in HBV-related ICC. The HBV recurrent integration genes identified from this study, such as TERT, provide new clues for further research on the causative link between HBV infection and ICC.
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Affiliation(s)
- Mengge Li
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Min Du
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hui Cong
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yuanyuan Gu
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Department of Emergency, Nanjing First Hospital, Nanjing, China
| | - Yuan Fang
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Organ Transplantation Center, The First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Jin Li
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yu Gan
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hong Tu
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jinyang Gu
- Department of Transplantation, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Qiang Xia
- Department of Liver Surgery, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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11
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Cai S, Yu X, Gu Z, Yang Q, Wen B, Sheng J, Guan R. A 10-gene prognostic methylation signature for stage I-III cervical cancer. Arch Gynecol Obstet 2020; 301:1275-1287. [PMID: 32274635 DOI: 10.1007/s00404-020-05524-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Accepted: 03/28/2020] [Indexed: 12/14/2022]
Abstract
PURPOSE Cervical cancer (CC) patients usually have poor prognosis. The present study aims to find a DNA methylation signature for predicting survival of CC patients. METHODS We selected CC patients at pathological stage I-III with corresponding information on radiotherapy and overall survival (OS) from TCGA. Differential expression and methylation analysis was done between patients with and without radiotherapy. We selected feature genes using recursive feature elimination algorithm to build a support vector machine classifier. DNA methylation biomarkers predictive of prognosis were identified using a LASSO Cox-Proportional Hazards model to construct a prognostic scoring model. The classifier and the prognostic model were tested on the training set and the validation set. Nomogram combining risk score and prognostic clinical factors were used. RESULTS We obtained 497 differentially expressed genes (DEGs) and 865 differentially methylated genes (DMGs). Fifteen feature genes were selected from the 292 common genes between the DEGs and the DMGs to construct a classification model for radiotherapy. A DNA methylation signature including 10 genes was identified and used to establish a prognostic scoring model. The 10-gene methylation signature could effectively separate patients into two risk groups with markedly different OS time. Predictive capability of the methylation signature was successfully confirmed on the validation set. A nomogram comprised of risk score, radiotherapy, and recurrence was applied, with calibration plots displaying good concordance between predicted and actual OS. The DEGs were involved in 12 KEGG pathways most of which were correlated with metastasis and proliferation of various cancers, such as pathways in cancer, basal cell carcinoma, transcriptional misregulation in cancer and ECM-receptor interaction. CONCLUSION We Identified a 10-gene methylation signature for risk stratification of CC patients at pathological stages I-III, and ten methylation biomarkers might be novel therapeutic targets for CC.
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Affiliation(s)
- Shengyun Cai
- Department of Obstetrics and Gynecology, Changhai Hospital, Second Military Medical University, NO.168, Changhai Road, Shanghai, 200433, People's Republic of China
| | - Xiaomin Yu
- Department of Obstetrics and Gynecology, Changhai Hospital, Second Military Medical University, NO.168, Changhai Road, Shanghai, 200433, People's Republic of China
| | - Zhongyi Gu
- Department of Obstetrics and Gynecology, Changhai Hospital, Second Military Medical University, NO.168, Changhai Road, Shanghai, 200433, People's Republic of China
| | - Qingqing Yang
- Department of Obstetrics and Gynecology, Changhai Hospital, Second Military Medical University, NO.168, Changhai Road, Shanghai, 200433, People's Republic of China
| | - Biwei Wen
- Department of Obstetrics and Gynecology, Changhai Hospital, Second Military Medical University, NO.168, Changhai Road, Shanghai, 200433, People's Republic of China
| | - Jizi Sheng
- Department of Obstetrics and Gynecology, Changhai Hospital, Second Military Medical University, NO.168, Changhai Road, Shanghai, 200433, People's Republic of China
| | - Rui Guan
- Department of Obstetrics and Gynecology, Changhai Hospital, Second Military Medical University, NO.168, Changhai Road, Shanghai, 200433, People's Republic of China.
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12
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ER and PI3K Pathway Activity in Primary ER Positive Breast Cancer Is Associated with Progression-Free Survival of Metastatic Patients under First-Line Tamoxifen. Cancers (Basel) 2020; 12:cancers12040802. [PMID: 32230714 PMCID: PMC7226576 DOI: 10.3390/cancers12040802] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 03/24/2020] [Accepted: 03/25/2020] [Indexed: 12/29/2022] Open
Abstract
Estrogen receptor positive (ER+) breast cancer patients are eligible for hormonal treatment, but only around half respond. A test with higher specificity for prediction of endocrine therapy response is needed to avoid hormonal overtreatment and to enable selection of alternative treatments. A novel testing method was reported before that enables measurement of functional signal transduction pathway activity in individual cancer tissue samples, using mRNA levels of target genes of the respective pathway-specific transcription factor. Using this method, 130 primary breast cancer samples were analyzed from non-metastatic ER+ patients, treated with surgery without adjuvant hormonal therapy, who subsequently developed metastatic disease that was treated with first-line tamoxifen. Quantitative activity levels were measured of androgen and estrogen receptor (AR and ER), PI3K-FOXO, Hedgehog (HH), NFκB, TGFβ, and Wnt pathways. Based on samples with known pathway activity, thresholds were set to distinguish low from high activity. Subsequently, pathway activity levels were correlated with the tamoxifen treatment response and progression-free survival. High ER pathway activity was measured in 41% of the primary tumors and was associated with longer time to progression (PFS) of metastases during first-line tamoxifen treatment. In contrast, high PI3K, HH, and androgen receptor pathway activity was associated with shorter PFS, and high PI3K and TGFβ pathway activity with worse treatment response. Potential clinical utility of assessment of ER pathway activity lies in predicting response to hormonal therapy, while activity of PI3K, HH, TGFβ, and AR pathways may indicate failure to respond, but also opens new avenues for alternative or complementary targeted treatments.
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13
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Chen R, Guo S, Yang C, Sun L, Zong B, Li K, Liu L, Tu G, Liu M, Liu S. Although c‑MYC contributes to tamoxifen resistance, it improves cisplatin sensitivity in ER‑positive breast cancer. Int J Oncol 2020; 56:932-944. [PMID: 32319562 PMCID: PMC7050981 DOI: 10.3892/ijo.2020.4987] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Accepted: 01/24/2020] [Indexed: 12/19/2022] Open
Abstract
Tamoxifen (TAM) resistance is a major challenge in the treatment of estrogen receptor‑positive (ER+) breast cancer. To date, to the best of our knowledge, there are only a few studies available examining the response of patients with TAM‑resistant breast cancer to chemotherapy, and the guidelines do not specify recommended drugs for these patients. In the present study, TAM‑resistant cells were shown to exhibit increased proliferation and invasion compared with the parent cells, and the increased expression of c‑MYC was demonstrated to play an important role in TAM resistance. Furthermore, the TAM‑resistant cells were significantly more sensitive to cisplatin compared with the parent cells, and the silencing of c‑MYC expression desensitized the cells to cisplatin through the inhibition of the cell cycle. An increased c‑MYC expression was observed in 28 pairs of primary and metastatic tumors from patients treated with TAM, and the clinical remission rate of cisplatin‑based chemotherapy was significantly higher compared with other chemotherapy‑based regimens in 122 patients with TAM resistant breast cancer. Taken together, the data of the present study demonstrated that although c‑MYC was involved in TAM resistance, it increased the sensitivity of ER+ breast cancer to cisplatin. Thus, cisplatin may be a preferred chemotherapeutic agent for the treatment of patients with TAM‑resistant breast cancer, particularly in patients where the rapid control of disease progression is required.
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Affiliation(s)
- Rui Chen
- Department of Endocrine and Breast Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
| | - Shipeng Guo
- Department of Endocrine and Breast Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
| | - Chengcheng Yang
- Department of Breast Surgery, The People's Hospital of Deyang, Deyang, Sichuan 618000, P.R. China
| | - Lu Sun
- Department of Endocrine and Breast Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
| | - Beige Zong
- Department of Endocrine and Breast Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
| | - Kang Li
- Department of Endocrine and Breast Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
| | - Li Liu
- Department of Endocrine and Breast Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
| | - Gang Tu
- Department of Endocrine and Breast Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
| | - Manran Liu
- Key Laboratory of Laboratory Medical Diagnostics, Chinese Ministry of Education, Chongqing Medical University, Chongqing 400016, P.R. China
| | - Shengchun Liu
- Department of Endocrine and Breast Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
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Hinz N, Jücker M. Distinct functions of AKT isoforms in breast cancer: a comprehensive review. Cell Commun Signal 2019; 17:154. [PMID: 31752925 PMCID: PMC6873690 DOI: 10.1186/s12964-019-0450-3] [Citation(s) in RCA: 164] [Impact Index Per Article: 32.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Accepted: 10/04/2019] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND AKT, also known as protein kinase B, is a key element of the PI3K/AKT signaling pathway. Moreover, AKT regulates the hallmarks of cancer, e.g. tumor growth, survival and invasiveness of tumor cells. After AKT was discovered in the early 1990s, further studies revealed that there are three different AKT isoforms, namely AKT1, AKT2 and AKT3. Despite their high similarity of 80%, the distinct AKT isoforms exert non-redundant, partly even opposing effects under physiological and pathological conditions. Breast cancer as the most common cancer entity in women, frequently shows alterations of the PI3K/AKT signaling. MAIN CONTENT A plethora of studies addressed the impact of AKT isoforms on tumor growth, metastasis and angiogenesis of breast cancer as well as on therapy response and overall survival in patients. Therefore, this review aimed to give a comprehensive overview about the isoform-specific effects of AKT in breast cancer and to summarize known downstream and upstream mechanisms. Taking account of conflicting findings among the studies, the majority of the studies reported a tumor initiating role of AKT1, whereas AKT2 is mainly responsible for tumor progression and metastasis. In detail, AKT1 increases cell proliferation through cell cycle proteins like p21, p27 and cyclin D1 and impairs apoptosis e.g. via p53. On the downside AKT1 decreases migration of breast cancer cells, for instance by regulating TSC2, palladin and EMT-proteins. However, AKT2 promotes migration and invasion most notably through regulation of β-integrins, EMT-proteins and F-actin. Whilst AKT3 is associated with a negative ER-status, findings about the role of AKT3 in regulation of the key properties of breast cancer are sparse. Accordingly, AKT1 is mutated and AKT2 is amplified in some cases of breast cancer and AKT isoforms are associated with overall survival and therapy response in an isoform-specific manner. CONCLUSIONS Although there are several discussed hypotheses how isoform specificity is achieved, the mechanisms behind the isoform-specific effects remain mostly unrevealed. As a consequence, further effort is necessary to achieve deeper insights into an isoform-specific AKT signaling in breast cancer and the mechanism behind it.
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Affiliation(s)
- Nico Hinz
- Institute of Biochemistry and Signal Transduction, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246, Hamburg, Germany
| | - Manfred Jücker
- Institute of Biochemistry and Signal Transduction, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246, Hamburg, Germany.
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15
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G-Protein Coupled Estrogen Receptor in Breast Cancer. Int J Mol Sci 2019; 20:ijms20020306. [PMID: 30646517 PMCID: PMC6359026 DOI: 10.3390/ijms20020306] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 01/10/2019] [Accepted: 01/12/2019] [Indexed: 12/16/2022] Open
Abstract
The G-protein coupled estrogen receptor (GPER), an alternate estrogen receptor (ER) with a structure distinct from the two canonical ERs, being ERα, and ERβ, is expressed in 50% to 60% of breast cancer tissues and has been presumed to be associated with the development of tamoxifen resistance in ERα positive breast cancer. On the other hand, triple-negative breast cancer (TNBC) constitutes 15% to 20% of breast cancers and frequently displays a more aggressive behavior. GPER is prevalent and involved in TNBC and can be a therapeutic target. However, contradictory results exist regarding the function of GPER in breast cancer, proliferative or pro-apoptotic. A better understanding of the GPER, its role in breast cancer, and the interactions with the ER and epidermal growth factor receptor will be beneficial for the disease management and prevention in the future.
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16
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Uhr K, Sieuwerts AM, de Weerd V, Smid M, Hammerl D, Foekens JA, Martens JWM. Association of microRNA-7 and its binding partner CDR1-AS with the prognosis and prediction of 1 st-line tamoxifen therapy in breast cancer. Sci Rep 2018; 8:9657. [PMID: 29941867 PMCID: PMC6018428 DOI: 10.1038/s41598-018-27987-w] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Accepted: 06/12/2018] [Indexed: 12/12/2022] Open
Abstract
The large number of non-coding RNAs (ncRNAs) and their breadth of functionalities has fuelled many studies on their roles in cancer. We previously linked four microRNAs to breast cancer prognosis. One of these microRNAs, hsa-miR-7, was found to be regulated by another type of ncRNA, the circular non-coding RNA (circRNA) CDR1-AS, which contains multiple hsa-miR-7 binding sites. Based on this finding, we studied the potential clinical value of this circRNA on breast cancer prognosis in a cohort based on a cohort that was previously analysed for hsa-miR-7 and in an adjuvant hormone-naïve cohort for 1st-line tamoxifen treatment outcomes, in which we also analysed hsa-miR-7. A negative correlation was observed between hsa-miR-7 and CDR1-AS in both cohorts. Despite associations with various clinical metrics (e.g., tumour grade, tumour size, and relapse location), CDR1-AS was neither prognostic nor predictive of relevant outcomes in our cohorts. However, we did observe stromal CDR1-AS expression, suggesting a possible cell-type specific interaction. Next to the known association of hsa-miR-7 expression with poor prognosis in primary breast cancer, we found that high hsa-miR-7 expression was predictive of an adverse response to tamoxifen therapy and poor progression-free and post-relapse overall survival in patients with recurrent disease.
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Affiliation(s)
- K Uhr
- Erasmus MC Cancer Institute, Erasmus University Medical Centre, Department of Medical Oncology and Cancer Genomics, Wytemaweg 80, 3015 CN, Rotterdam, The Netherlands
| | - A M Sieuwerts
- Erasmus MC Cancer Institute, Erasmus University Medical Centre, Department of Medical Oncology and Cancer Genomics, Wytemaweg 80, 3015 CN, Rotterdam, The Netherlands.
| | - V de Weerd
- Erasmus MC Cancer Institute, Erasmus University Medical Centre, Department of Medical Oncology and Cancer Genomics, Wytemaweg 80, 3015 CN, Rotterdam, The Netherlands
| | - M Smid
- Erasmus MC Cancer Institute, Erasmus University Medical Centre, Department of Medical Oncology and Cancer Genomics, Wytemaweg 80, 3015 CN, Rotterdam, The Netherlands
| | - D Hammerl
- Erasmus MC Cancer Institute, Erasmus University Medical Centre, Department of Medical Oncology and Cancer Genomics, Wytemaweg 80, 3015 CN, Rotterdam, The Netherlands
| | - J A Foekens
- Erasmus MC Cancer Institute, Erasmus University Medical Centre, Department of Medical Oncology and Cancer Genomics, Wytemaweg 80, 3015 CN, Rotterdam, The Netherlands
| | - J W M Martens
- Erasmus MC Cancer Institute, Erasmus University Medical Centre, Department of Medical Oncology and Cancer Genomics, Wytemaweg 80, 3015 CN, Rotterdam, The Netherlands
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17
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Zhou C, Yu C, Guo L, Wang X, Li H, Cao Q, Li F. In Vivo Study of the Effects of ER β on Apoptosis and Proliferation of Hormone-Independent Prostate Cancer Cell Lines PC-3M. BIOMED RESEARCH INTERNATIONAL 2018; 2018:1439712. [PMID: 30018975 PMCID: PMC6029510 DOI: 10.1155/2018/1439712] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/02/2017] [Revised: 04/09/2018] [Accepted: 04/19/2018] [Indexed: 11/18/2022]
Abstract
OBJECTIVE To evaluate the in vivo therapeutic effects of attenuated Salmonella carrying PCDNA3.1-ERβ plasmid in hormone-independent prostatic cancer in nude mice and to clarify the mechanism by which estrogen receptor β (ERβ) induces apoptosis and proliferation in prostatic cancer cells in mice. METHODS The orthotopic prostatic cancer models of mice were randomly divided as follows: MOCK group, treated with PBS, PQ group, treated with attenuated Salmonella alone, PQ-PCDNA3.1 group, treated with attenuated Salmonella carrying PCDNA3.1 plasmid, and PQ-PCDNA3.1-ERβ group, treated with the attenuated Salmonella carrying PCDNA3.1-ERβ plasmid. Then, 10 μl of the plasmid-containing solution, comprising 1 × 107 cfu of the bacteria, was administered via intranasal delivery to each group except the MOCK group. The experimental methods included flow cytometry and terminal deoxyribonucleotidyl transferase-mediated dUTP-digoxigenin nick end-labelling (TUNEL) assay, immunohistochemistry, and western blotting. RESULTS Compared with the MOCK, PQ, and PQ-PCDNA3.1 groups, the weights of tumors in the PQ-PCDNA3.1-ERβ group were significantly reduced. The results of flow cytometry and TUNEL assay revealed that the number of apoptotic cells in the PQ-PCDNA3.1-ERβ group significantly increased. Compared with PQ-PCDNA3.1 group, the protein expression levels of ERβ, Bad, p-caspase 9, p-caspase 3, and cleaved PARP in the PQ-PCDNA3.1-ERβ group were significantly increased, while the expression levels of Akt, p-Akt, and Bcl-xl were decreased (P < 0.05). CONCLUSION The attenuated Salmonella carrying PCDNA3.1-ERβ plasmid could inhibit the growth of orthotopic prostatic cancer in mice by increasing the expression of ERβ.
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Affiliation(s)
- Changli Zhou
- School of Nursing, Jilin University, 965 Xinjiang Street, Changchun, Jilin 130020, China
| | - Chunyu Yu
- Basic Medical School, Jilin University, 126 Xinmin Street, Changchun, Jilin 130020, China
| | - Lirong Guo
- School of Nursing, Jilin University, 965 Xinjiang Street, Changchun, Jilin 130020, China
| | - Xige Wang
- School of Nursing, Jilin University, 965 Xinjiang Street, Changchun, Jilin 130020, China
| | - Huimin Li
- School of Nursing, Jilin University, 965 Xinjiang Street, Changchun, Jilin 130020, China
| | - Qinqin Cao
- School of Nursing, Jilin University, 965 Xinjiang Street, Changchun, Jilin 130020, China
| | - Feng Li
- School of Nursing, Jilin University, 965 Xinjiang Street, Changchun, Jilin 130020, China
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18
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Mitochondrial DNA content in breast cancer: Impact on in vitro and in vivo phenotype and patient prognosis. Oncotarget 2018; 7:29166-76. [PMID: 27081694 PMCID: PMC5045386 DOI: 10.18632/oncotarget.8688] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2015] [Accepted: 03/28/2016] [Indexed: 01/01/2023] Open
Abstract
Reduced mitochondrial DNA (mtDNA) content in breast cancer cell lines has been associated with transition towards a mesenchymal phenotype, but its clinical consequences concerning breast cancer dissemination remain unidentified. Here, we aimed to clarify the link between mtDNA content and a mesenchymal phenotype and its relation to prognosis of breast cancer patients. We analyzed mtDNA content in 42 breast cancer cell lines and 207 primary breast tumor specimens using a combination of quantitative PCR and array-based copy number analysis. By associating mtDNA content with expression levels of genes involved in epithelial-to-mesenchymal transition (EMT) and with the intrinsic breast cancer subtypes, we could not identify a relation between low mtDNA content and mesenchymal properties in the breast cancer cell lines or in the primary breast tumors. In addition, we explored the relation between mtDNA content and prognosis in our cohort of primary breast tumor specimens that originated from patients with lymph node-negative disease who did not receive any (neo)adjuvant systemic therapy. When patients were divided based on the tumor quartile levels of mtDNA content, those in the lowest quarter (≤ 350 mtDNA molecules per cell) showed a poorer 10-year distant metastasis-free survival than patients with > 350 mtDNA molecules per cell (HR 0.50 [95% CI 0.29-0.87], P = 0.015). The poor prognosis was independent of established clinicopathological markers (HR 0.54 [95% CI 0.30-0.97], P = 0.038). We conclude that, despite a lack of evidence between mtDNA content and EMT, low mtDNA content might provide meaningful prognostic value for distant metastasis in breast cancer.
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Weerts MJA, Hollestelle A, Sieuwerts AM, Foekens JA, Sleijfer S, Martens JWM. Low Tumor Mitochondrial DNA Content Is Associated with Better Outcome in Breast Cancer Patients Receiving Anthracycline-Based Chemotherapy. Clin Cancer Res 2017; 23:4735-4743. [PMID: 28420722 DOI: 10.1158/1078-0432.ccr-17-0032] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Revised: 02/20/2017] [Accepted: 04/11/2017] [Indexed: 11/16/2022]
Abstract
Purpose: In this study, we aimed to explore whether low levels of mitochondrial DNA (mtDNA) content in the primary tumor could predict better outcome for breast cancer patients receiving anthracycline-based therapies. We hypothesized that tumor cells with low mtDNA content are more susceptible to mitochondrial damage induced by anthracyclines, and thus are more susceptible to anthracycline treatment.Experimental Design: We measured mtDNA content by a qPCR approach in 295 primary breast tumor specimens originating from two well-defined cohorts: 174 lymph node-positive patients who received adjuvant chemotherapy and 121 patients with advanced disease who received chemotherapy as first-line palliative treatment. The chemotherapy regimens given were either anthracycline-based (FAC/FEC) or methotrexate-based (CMF).Results: In both the adjuvant and advanced settings, we observed increased benefit for patients with low mtDNA content in their primary tumor, but only when treated with FAC/FEC. In multivariable Cox regression analysis for respectively distant metastasis-free survival and progression-free survival, the HR for the FAC/FEC-treated mtDNA low group in the adjuvant setting was 0.46 [95% confidence interval (CI), 0.24-0.89; P = 0.020] and in the advanced setting 0.49 (95% CI, 0.27-0.90; P = 0.022) compared with the FAC/FEC-treated mtDNA high group. We did not observe these associations in the patients treated with CMF.Conclusions: In our two study cohorts, breast cancer patients with low mtDNA content in their primary tumor had better outcome from anthracycline-containing chemotherapy. The frequently observed decrease in mtDNA content in primary breast tumors may be exploited by guiding chemotherapeutic regimen decision making. Clin Cancer Res; 23(16); 4735-43. ©2017 AACR.
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Affiliation(s)
- Marjolein J A Weerts
- Department of Medical Oncology and Cancer Genomics Netherlands, Erasmus MC Cancer Institute, Erasmus University Medical Center, Rotterdam, the Netherlands.
| | - Antoinette Hollestelle
- Department of Medical Oncology and Cancer Genomics Netherlands, Erasmus MC Cancer Institute, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - Anieta M Sieuwerts
- Department of Medical Oncology and Cancer Genomics Netherlands, Erasmus MC Cancer Institute, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - John A Foekens
- Department of Medical Oncology and Cancer Genomics Netherlands, Erasmus MC Cancer Institute, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - Stefan Sleijfer
- Department of Medical Oncology and Cancer Genomics Netherlands, Erasmus MC Cancer Institute, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - John W M Martens
- Department of Medical Oncology and Cancer Genomics Netherlands, Erasmus MC Cancer Institute, Erasmus University Medical Center, Rotterdam, the Netherlands
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Ross JS, Gay LM. Comprehensive genomic sequencing and the molecular profiles of clinically advanced breast cancer. Pathology 2017; 49:120-132. [DOI: 10.1016/j.pathol.2016.11.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Revised: 11/09/2016] [Accepted: 11/09/2016] [Indexed: 02/06/2023]
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Liu J, Sieuwerts AM, Look MP, van der Vlugt-Daane M, Meijer-van Gelder ME, Foekens JA, Hollestelle A, Martens JWM. The 29.5 kb APOBEC3B Deletion Polymorphism Is Not Associated with Clinical Outcome of Breast Cancer. PLoS One 2016; 11:e0161731. [PMID: 27552096 PMCID: PMC4995039 DOI: 10.1371/journal.pone.0161731] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Accepted: 08/10/2016] [Indexed: 12/25/2022] Open
Abstract
Increased APOBEC3B mRNA levels are associated with a hypermutator phenotype and poor prognosis in ER-positive breast cancer patients. In addition, a 29.5 kb deletion polymorphism of APOBEC3B, resulting in an APOBEC3A-B hybrid transcript, has been associated with an increased breast cancer risk and the hypermutator phenotype. Here we evaluated whether the APOBEC3B deletion polymorphism also associates with clinical outcome of breast cancer. Copy number analysis was performed by quantitative PCR (qPCR) in primary tumors of 1,756 Dutch breast cancer patients. The APOBEC3B deletion was found in 187 patients of whom 16 carried a two-copy deletion and 171 carried a one-copy deletion. The prognostic value of the APOBEC3B deletion for the natural course of the disease was evaluated among 1,076 lymph-node negative (LNN) patients who did not receive adjuvant systemic treatment. No association was found between APOBEC3B copy number values and the length of metastasis-free survival (MFS; hazard ratio (HR) = 1.00, 95% confidence interval (CI) = 0.90–1.11, P = 0.96). Subgroup analysis by ER status also did not reveal an association between APOBEC3B copy number values and the length of MFS. The predictive value of the APOBEC3B deletion was assessed among 329 ER-positive breast cancer patients who received tamoxifen as the first-line therapy for recurrent disease and 226 breast cancer patients who received first-line chemotherapy for recurrent disease. No association between APOBEC3B copy number values and the overall response rate (ORR) to either tamoxifen (odds ratio (OR) = 0.88, 95% CI = 0.69–1.13, P = 0.31) or chemotherapy (OR = 0.97, 95% CI = 0.71–1.33, P = 0.87) was found. Thus, in contrast to APOBEC3B mRNA levels, the APOBEC3B deletion polymorphism has neither a prognostic nor a predictive value for breast cancer patients. Although a correlation exists between APOBEC3B copy number and mRNA expression, it is relatively weak. This suggests that other mechanisms exist that may affect and therefore determine the prognostic value of APOBEC3B mRNA levels.
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Affiliation(s)
- Jingjing Liu
- Department of Medical Oncology, Erasmus MC Cancer Institute, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - Anieta M. Sieuwerts
- Department of Medical Oncology, Erasmus MC Cancer Institute, Erasmus University Medical Center, Rotterdam, the Netherlands
- Cancer Genomics Netherlands, Utrecht, the Netherlands
| | - Maxime P. Look
- Department of Medical Oncology, Erasmus MC Cancer Institute, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - Michelle van der Vlugt-Daane
- Department of Medical Oncology, Erasmus MC Cancer Institute, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - Marion E. Meijer-van Gelder
- Department of Medical Oncology, Erasmus MC Cancer Institute, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - John A. Foekens
- Department of Medical Oncology, Erasmus MC Cancer Institute, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - Antoinette Hollestelle
- Department of Medical Oncology, Erasmus MC Cancer Institute, Erasmus University Medical Center, Rotterdam, the Netherlands
- * E-mail:
| | - John W. M. Martens
- Department of Medical Oncology, Erasmus MC Cancer Institute, Erasmus University Medical Center, Rotterdam, the Netherlands
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22
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Menendez JA, Vellon L, Espinoza I, Lupu R. The metastasis inducer CCN1 (CYR61) activates the fatty acid synthase (FASN)-driven lipogenic phenotype in breast cancer cells. Oncoscience 2016; 3:242-257. [PMID: 27713913 PMCID: PMC5043073 DOI: 10.18632/oncoscience.314] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Accepted: 07/08/2016] [Indexed: 11/25/2022] Open
Abstract
The angiogenic inducer CCN1 (Cysteine-rich 61, CYR61) is differentially activated in metastatic breast carcinomas. However, little is known about the precise mechanisms that underlie the pro-metastatic actions of CCN1. Here, we investigated the impact of CCN1 expression on fatty acid synthase (FASN), a metabolic oncogene thought to provide cancer cells with proliferative and survival advantages. Forced expression of CCN1 in MCF-7 cells robustly up-regulated FASN protein expression and also significantly increased FASN gene promoter activity 2- to 3-fold, whereas deletion of the sterol response element-binding protein (SREBP) binding site in the FASN promoter completely abrogated CCN1-driven transcriptional activation. Pharmacological blockade of MAPK or PI-3'K activation similarly prevented the ability of CCN1 to induce FASN gene activation. Pharmacological inhibition of FASN activity with the mycotoxin cerulenin or the small compound C75 reversed CCN1-induced acquisition of estrogen independence and resistance to hormone therapies such as tamoxifen and fulvestrant in anchorage-independent growth assays. This study uncovers FASNdependent endogenous lipogenesis as a new mechanism controlling the metastatic phenotype promoted by CCN1. Because estrogen independence and progression to a metastatic phenotype are hallmarks of therapeutic resistance and mortality in breast cancer, this previously unrecognized CCN1-driven lipogenic phenotype represents a novel metabolic target to clinically manage metastatic disease progression.
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Affiliation(s)
- Javier A Menendez
- ProCURE (Program Against Cancer Therapeutic Resistance), Metabolism and Cancer Group, Catalan Institute of Oncology, Girona, Catalonia, Spain; Girona Biomedical Research Institute (IDIBGI), Girona, Spain
| | - Luciano Vellon
- IBYME, CONICET-Laboratorio de Immunohematología, Buenos Aires, Argentina
| | - Ingrid Espinoza
- Cancer Institute, University of Mississippi, Jackson, MS, USA; Department of Preventive Medicine, University of Mississippi, Jackson, MS, USA
| | - Ruth Lupu
- Mayo Clinic, Department of Laboratory Medicine and Pathology, Division of Experimental Pathology, Rochester, MN, USA; Mayo Clinic Cancer Center, Rochester, MN, USA
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23
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De Marchi T, Foekens JA, Umar A, Martens JWM. Endocrine therapy resistance in estrogen receptor (ER)-positive breast cancer. Drug Discov Today 2016; 21:1181-8. [PMID: 27233379 DOI: 10.1016/j.drudis.2016.05.012] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Revised: 04/25/2016] [Accepted: 05/18/2016] [Indexed: 12/20/2022]
Abstract
Estrogen receptor (ER)-positive breast cancer represents the majority (∼70%) of all breast malignancies. In this subgroup of breast cancers, endocrine therapies are effective both in the adjuvant and recurrent settings, although resistance remains a major issue. Several high-throughput approaches have been used to elucidate mechanisms of resistance and to derive potential predictive markers or alternative therapies. In this review, we cover the state-of-the-art of endocrine-resistance biomarker discovery with regard to the latest technological developments, and discuss current opportunities and restrictions for their implementation into a clinical setting.
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Affiliation(s)
- Tommaso De Marchi
- Department of Medical Oncology, Erasmus MC Cancer Institute, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - John A Foekens
- Department of Medical Oncology, Erasmus MC Cancer Institute, Erasmus University Medical Center, Rotterdam, The Netherlands.
| | - Arzu Umar
- Department of Medical Oncology, Erasmus MC Cancer Institute, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - John W M Martens
- Department of Medical Oncology, Erasmus MC Cancer Institute, Erasmus University Medical Center, Rotterdam, The Netherlands
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24
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GATA3 mRNA expression, but not mutation, associates with longer progression-free survival in ER-positive breast cancer patients treated with first-line tamoxifen for recurrent disease. Cancer Lett 2016; 376:104-9. [PMID: 27018307 DOI: 10.1016/j.canlet.2016.03.038] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Revised: 03/22/2016] [Accepted: 03/22/2016] [Indexed: 11/22/2022]
Abstract
In breast cancer, GATA3 mutations have been associated with a favorable prognosis and the response to neoadjuvant aromatase inhibitor treatment. Therefore, we investigated whether GATA3 mutations predict the outcome of tamoxifen treatment in the advanced setting. In a retrospective study consisting of 235 hormone-naive patients with ER-positive breast cancer who received tamoxifen as first-line treatment for recurrent disease, GATA3 mutations (in 14.0% of patients) did not significantly associate with either the overall response rate (ORR) or with the length of progression-free survival (PFS) after the start of tamoxifen therapy. Interestingly, among 148 patients for whom both mutation and mRNA expression data were available, GATA3 mutations associated with an increased expression of GATA3. However, only 23.7% of GATA3 high tumors had a mutation. Evaluation of the clinical significance of GATA3 mRNA revealed that it was associated with prolonged PFS, but not with the ORR, also in multivariate analysis. Thus, GATA3 mRNA expression, but not GATA3 mutation, is an independent predictor of prolonged PFS in ER-positive breast cancer patients who received first-line tamoxifen for recurrent disease. Besides GATA3 mutation, other mechanisms must exist that underlie increased GATA3 levels.
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25
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Zhou JW, Li Y, Yue LX, Luo CL, Chen Y, Zhang JY. Autoantibody response to Sui1 and its tissue-specific expression in hepatocellular carcinoma. Tumour Biol 2015; 37:2547-53. [DOI: 10.1007/s13277-015-4074-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Accepted: 09/13/2015] [Indexed: 01/09/2023] Open
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26
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van Agthoven T, Dorssers LCJ, Lehmann U, Kreipe H, Looijenga LHJ, Christgen M. Breast Cancer Anti-Estrogen Resistance 4 (BCAR4) Drives Proliferation of IPH-926 lobular Carcinoma Cells. PLoS One 2015; 10:e0136845. [PMID: 26317614 PMCID: PMC4552740 DOI: 10.1371/journal.pone.0136845] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2015] [Accepted: 08/10/2015] [Indexed: 12/14/2022] Open
Abstract
Background Most breast cancers depend on estrogenic growth stimulation. Functional genetic screenings in in vitro cell models have identified genes, which override growth suppression induced by anti-estrogenic drugs like tamoxifen. Using that approach, we have previously identified Breast Cancer Anti-Estrogen Resistance 4 (BCAR4) as a mediator of cell proliferation and tamoxifen-resistance. Here, we show high level of expression and function of BCAR4 in human breast cancer. Methods BCAR4 mRNA expression was evaluated by (q)RT-PCR in a panel of human normal tissues, primary breast cancers and cell lines. A new antibody raised against C78-I97 of the putative BCAR4 protein and used for western blot and immunoprecipitation assays. Furthermore, siRNA-mediated gene silencing was implemented to study the function of BCAR4 and its downstream targets ERBB2/3. Results Except for placenta, all human normal tissues tested were BCAR4-negative. In primary breast cancers, BCAR4 expression was comparatively rare (10%), but associated with enhanced proliferation. Relative high BCAR4 mRNA expression was identified in IPH-926, a cell line derived from an endocrine-resistant lobular breast cancer. Moderate BCAR4 expression was evident in MDA-MB-134 and MDA-MB-453 breast cancer cells. BCAR4 protein was detected in breast cancer cells with ectopic (ZR-75-1-BCAR4) and endogenous (IPH-926, MDA-MB-453) BCAR4 mRNA expression. Knockdown of BCAR4 inhibited cell proliferation. A similar effect was observed upon knockdown of ERBB2/3 and exposure to lapatinib, implying that BCAR4 acts in an ERBB2/3-dependent manner. Conclusion BCAR4 encodes a functional protein, which drives proliferation of endocrine-resistant breast cancer cells. Lapatinib, a clinically approved EGFR/ERBB2 inhibitor, counteracts BCAR4-driven tumor cell growth, a clinical relevant observation.
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MESH Headings
- Adult
- Aged
- Breast Neoplasms/genetics
- Breast Neoplasms/metabolism
- Breast Neoplasms/pathology
- Carcinoma, Lobular/genetics
- Carcinoma, Lobular/metabolism
- Carcinoma, Lobular/pathology
- Cell Line, Tumor
- Cell Proliferation/drug effects
- Female
- Humans
- Lapatinib
- Middle Aged
- Protein Kinase Inhibitors/pharmacology
- Quinazolines/pharmacology
- RNA, Long Noncoding/genetics
- RNA, Long Noncoding/metabolism
- Receptor, ErbB-2/genetics
- Receptor, ErbB-2/metabolism
- Receptor, ErbB-3/genetics
- Receptor, ErbB-3/metabolism
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Affiliation(s)
- Ton van Agthoven
- Department of Pathology, Erasmus MC Cancer Institute, Rotterdam, the Netherlands
- * E-mail:
| | | | - Ulrich Lehmann
- Institute of Pathology, Hannover Medical School, Hannover, Germany
| | - Hans Kreipe
- Institute of Pathology, Hannover Medical School, Hannover, Germany
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27
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Dalm SU, Sieuwerts AM, Look MP, Melis M, van Deurzen CHM, Foekens JA, de Jong M, Martens JWM. Clinical Relevance of Targeting the Gastrin-Releasing Peptide Receptor, Somatostatin Receptor 2, or Chemokine C-X-C Motif Receptor 4 in Breast Cancer for Imaging and Therapy. J Nucl Med 2015; 56:1487-93. [PMID: 26251419 DOI: 10.2967/jnumed.115.160739] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2015] [Accepted: 07/21/2015] [Indexed: 02/07/2023] Open
Abstract
UNLABELLED Imaging and therapy using radioligands targeting receptors overexpressed on tumor cells is successfully applied in neuroendocrine tumor patients. Because expression of the gastrin-releasing peptide receptor (GRPR), somatostatin receptor 2 (SSTR2), and chemokine C-X-C motif receptor 4 (CXCR4) has been demonstrated in breast cancer, targeting these receptors using radioligands might offer new imaging and therapeutic opportunities for breast cancer patients. The aim of this study was to correlate messenger RNA (mRNA) expression of GRPR, SSTR2, and CXCR4 with clinicopathologic and biologic factors, and with prognosis and prediction to therapy response, in order to identify specific breast cancer patient groups suited for the application of radioligands targeting these receptors. METHODS First, we studied GRPR and SSTR2 expression in 13 clinical breast cancer specimens by in vitro autoradiography and correlated this with corresponding mRNA levels to investigate whether mRNA levels reliably represent cell surface expression. Next, GRPR, SSTR2, and CXCR4 mRNA levels were measured by quantitative reverse transcriptase polymerase chain reaction in 915 primary breast cancer tissues and correlated with known clinicopathologic and biologic factors, disease-free survival, distant metastasis-free survival, and overall survival (DFS, MFS, and OS, respectively). In 224 adjuvant hormonal treatment-naïve estrogen receptor (ER, ESR1)-positive patients who received tamoxifen as first-line therapy for recurrent or metastatic disease, the expression levels of the receptors were correlated with progression-free survival. RESULTS Our results showed a significant positive correlation between GRPR and SSTR2 expression analyzed by in vitro autoradiography and by quantitative reverse transcriptase polymerase chain reaction (Spearman's rank correlation coefficient [Rs]=0.94, P<0.001, and Rs=0.73, P=0.0042, respectively). Furthermore, high GRPR and SSTR2 mRNA levels were observed more frequently in ESR1-positive specimens, whereas high CXCR4 expression was associated with ESR1-negative specimens. Also, high mRNA expression of CXCR4 was associated with a prolonged DFS, MFS, and OS (multivariate hazard ratio MFS=0.76 [95% confidence interval, 0.64-0.90], P=0.001), whereas high mRNA levels of GRPR were associated with a prolonged progression-free survival after the start of first-line tamoxifen treatment (multivariate hazard ratio=0.68 [95% confidence interval, 0.48-0.97], P=0.031). CONCLUSION Our data indicate that imaging and therapy using GRPR or SSTR2 radioligands might especially be beneficial for ESR1-positive breast cancer and CXCR4 radioligands for ESR1-negative breast cancer.
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Affiliation(s)
- Simone U Dalm
- Departments of Nuclear Medicine and Radiology, Erasmus MC, Rotterdam, The Netherlands
| | - Anieta M Sieuwerts
- Department of Medical Oncology and Cancer Genomics Netherlands, Erasmus MC Cancer Institute, Erasmus MC, Rotterdam, The Netherlands; and
| | - Maxime P Look
- Department of Medical Oncology and Cancer Genomics Netherlands, Erasmus MC Cancer Institute, Erasmus MC, Rotterdam, The Netherlands; and
| | - Marleen Melis
- Departments of Nuclear Medicine and Radiology, Erasmus MC, Rotterdam, The Netherlands
| | | | - John A Foekens
- Department of Medical Oncology and Cancer Genomics Netherlands, Erasmus MC Cancer Institute, Erasmus MC, Rotterdam, The Netherlands; and
| | - Marion de Jong
- Departments of Nuclear Medicine and Radiology, Erasmus MC, Rotterdam, The Netherlands
| | - John W M Martens
- Department of Medical Oncology and Cancer Genomics Netherlands, Erasmus MC Cancer Institute, Erasmus MC, Rotterdam, The Netherlands; and
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28
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Sarma P, Bag I, Ramaiah MJ, Kamal A, Bhadra U, Pal Bhadra M. Bisindole-PBD regulates breast cancer cell proliferation via SIRT-p53 axis. Cancer Biol Ther 2015; 16:1486-501. [PMID: 26192233 DOI: 10.1080/15384047.2015.1071731] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
In a previous study we reported the role of potent bisindole-PBD conjugate as an inclusion in the arsenal of breast cancer therapeutics. In breast cancer cell proliferation, PI3K/AKT/mTOR pathway plays a crucial role by prosurvival mechanism that inhibits programmed cell death. Here, 2 breast cancer cells lines, MCF-7 and MDA-MB-231 were treated with Vorinostat (suberoylanilide hydroxamic acid / SAHA) and bisindole-PBD (5b). We have investigated the effect on PI3K/AKT/mTOR pathway and SIRT expression including epigenetic regulation. There was consistent decrease in the level of PI3K, AKT, mTOR proteins upon treatment of 5b in both MCF-7 and MDA-MB-231 cell lines compared to untreated controls. Treatment with caspase inhibitor (Q-VD-OPH) confirmed that the effect of 5b on PI3K signaling was ahead of apoptosis. Real time PCR and western blot analysis showed profound reduction in the mRNA and protein levels of SIRT1 and SIRT2. Molecular docking studies also supported the interaction of 5b with various amino acids of SIRT2 proteins. Treatment with 5b caused epigenetic changes that include increase of acetylated forms of p53, increase of histone acetylation at p21 promoter as well as decrease in methylation state of p21 gene. Compound 5b thus acts as SIRT inhibitor and cause p53 activation via inhibition of growth factor signaling and activation of p53 dependent apoptotic signaling. This present study focuses bisindole-PBD on epigenetic alteration putting 5b as a promising therapeutic tool in the realm of breast cancer research.
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Affiliation(s)
- Pranjal Sarma
- a Centre for Chemical Biology; CSIR-Indian Institute of Chemical Technology ; Tarnaka, Hyderabad , India
| | - Indira Bag
- a Centre for Chemical Biology; CSIR-Indian Institute of Chemical Technology ; Tarnaka, Hyderabad , India.,b Functional Genomics and Gene Silencing Group; CSIR-Center for Cellular and Molecular Biology ; Hyderabad , India
| | - M Janaki Ramaiah
- a Centre for Chemical Biology; CSIR-Indian Institute of Chemical Technology ; Tarnaka, Hyderabad , India.,c School of Chemical & Biotechnology; SASTRA University ; Tirumalaisamudram, Thanjavur , India
| | - Ahmed Kamal
- d Medicinal Chemistry and Pharmacology; CSIR-Indian Institute of Chemical Technology ; Tarnaka, Hyderabad , India
| | - Utpal Bhadra
- b Functional Genomics and Gene Silencing Group; CSIR-Center for Cellular and Molecular Biology ; Hyderabad , India
| | - Manika Pal Bhadra
- a Centre for Chemical Biology; CSIR-Indian Institute of Chemical Technology ; Tarnaka, Hyderabad , India
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29
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Deneka A, Korobeynikov V, Golemis EA. Embryonal Fyn-associated substrate (EFS) and CASS4: The lesser-known CAS protein family members. Gene 2015; 570:25-35. [PMID: 26119091 DOI: 10.1016/j.gene.2015.06.062] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2015] [Accepted: 06/23/2015] [Indexed: 01/15/2023]
Abstract
The CAS (Crk-associated substrate) adaptor protein family consists of four members: CASS1/BCAR1/p130Cas, CASS2/NEDD9/HEF1/Cas-L, CASS3/EFS/Sin and CASS4/HEPL. While CAS proteins lack enzymatic activity, they contain specific recognition and binding sites for assembly of larger signaling complexes that are essential for cell proliferation, survival, migration, and other processes. All family members are intermediates in integrin-dependent signaling pathways mediated at focal adhesions, and associate with FAK and SRC family kinases to activate downstream effectors regulating the actin cytoskeleton. Most studies of CAS proteins to date have been focused on the first two members, BCAR1 and NEDD9, with altered expression of these proteins now appreciated as influencing disease development and prognosis for cancer and other serious pathological conditions. For these family members, additional mechanisms of action have been defined in receptor tyrosine kinase (RTK) signaling, estrogen receptor signaling or cell cycle progression, involving discrete partner proteins such as SHC, NSP proteins, or AURKA. By contrast, EFS and CASS4 have been less studied, although structure-function analyses indicate they conserve many elements with the better-known family members. Intriguingly, a number of recent studies have implicated these proteins in immune system function, and the pathogenesis of developmental disorders, autoimmune disorders including Crohn's disease, Alzheimer's disease, cancer and other diseases. In this review, we summarize the current understanding of EFS and CASS4 protein function in the context of the larger CAS family group.
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Affiliation(s)
- Alexander Deneka
- Molecular Therapeutics Program, Fox Chase Cancer Center, Philadelphia, PA, 19111, United States; Kazan Federal University, 420000, Kazan, Russian Federation
| | - Vladislav Korobeynikov
- Molecular Therapeutics Program, Fox Chase Cancer Center, Philadelphia, PA, 19111, United States; Novosibirsk State University, Medical Department, 630090, Novosibirsk, Russian Federation
| | - Erica A Golemis
- Molecular Therapeutics Program, Fox Chase Cancer Center, Philadelphia, PA, 19111, United States.
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30
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ObRb downregulation increases breast cancer cell sensitivity to tamoxifen. Tumour Biol 2015; 36:6813-21. [DOI: 10.1007/s13277-015-3375-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2015] [Accepted: 03/24/2015] [Indexed: 01/12/2023] Open
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31
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Jansen MPHM, Sas L, Sieuwerts AM, Van Cauwenberghe C, Ramirez-Ardila D, Look M, Ruigrok-Ritstier K, Finetti P, Bertucci F, Timmermans MM, van Deurzen CHM, Martens JWM, Simon I, Roepman P, Linn SC, van Dam P, Kok M, Lardon F, Vermeulen PB, Foekens JA, Dirix L, Berns EMJJ, Van Laere S. Decreased expression of ABAT and STC2 hallmarks ER-positive inflammatory breast cancer and endocrine therapy resistance in advanced disease. Mol Oncol 2015; 9:1218-33. [PMID: 25771305 DOI: 10.1016/j.molonc.2015.02.006] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2015] [Revised: 02/12/2015] [Accepted: 02/13/2015] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Patients with Estrogen Receptor α-positive (ER+) Inflammatory Breast Cancer (IBC) are less responsive to endocrine therapy compared with ER+ non-IBC (nIBC) patients. The study of ER+ IBC samples might reveal biomarkers for endocrine resistant breast cancer. MATERIALS & METHODS Gene expression profiles of ER+ samples from 201 patients were explored for genes that discriminated between IBC and nIBC. Classifier genes were applied onto clinically annotated expression data from 947 patients with ER+ breast cancer and validated with RT-qPCR for 231 patients treated with first-line tamoxifen. Relationships with metastasis-free survival (MFS) and progression-free survival (PFS) following adjuvant and first-line endocrine treatment, respectively, were investigated using Cox regression analysis. RESULTS A metagene of six genes including the genes encoding for 4-aminobutyrate aminotransferase (ABAT) and Stanniocalcin-2 (STC2) were identified to distinguish 22 ER+ IBC from 43 ER+ nIBC patients and remained discriminatory in an independent series of 136 patients. The metagene and two genes were not prognostic in 517 (neo)adjuvant untreated lymph node-negative ER+ nIBC breast cancer patients. Only ABAT was related to outcome in 250 patients treated with adjuvant tamoxifen. Three independent series of in total 411 patients with advanced disease showed increased metagene scores and decreased expression of ABAT and STC2 to be correlated with poor first-line endocrine therapy outcome. The biomarkers remained predictive for first-line tamoxifen treatment outcome in multivariate analysis including traditional factors or published signatures. In an exploratory analysis, ABAT and STC2 protein expression levels had no relation with PFS after first-line tamoxifen. CONCLUSIONS This study utilized ER+ IBC to identify a metagene including ABAT and STC2 as predictive biomarkers for endocrine therapy resistance.
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Affiliation(s)
- Maurice P H M Jansen
- Department of Medical Oncology, Erasmus MC Cancer Institute, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3000 CA Rotterdam, The Netherlands.
| | - Leen Sas
- Translational Cancer Research Unit, GZA Hospitals St-Augustinus, Oosterveldlaan 24, Antwerp B2610, Belgium; Department of Medical Oncology, University Hospital Antwerp, Wilrijkstraat 10, B2650 Antwerp, Belgium
| | - Anieta M Sieuwerts
- Department of Medical Oncology, Erasmus MC Cancer Institute, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3000 CA Rotterdam, The Netherlands
| | - Caroline Van Cauwenberghe
- Neurodegenerative Brain Diseases Group, Department of Molecular Genetics, VIB, Antwerp, Belgium; Institute Born-Bunge, University of Antwerp, Antwerp, Belgium
| | - Diana Ramirez-Ardila
- Department of Medical Oncology, Erasmus MC Cancer Institute, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3000 CA Rotterdam, The Netherlands
| | - Maxime Look
- Department of Medical Oncology, Erasmus MC Cancer Institute, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3000 CA Rotterdam, The Netherlands
| | - Kirsten Ruigrok-Ritstier
- Department of Medical Oncology, Erasmus MC Cancer Institute, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3000 CA Rotterdam, The Netherlands
| | - Pascal Finetti
- Marseille Cancer Research Center (CRCM), UMR891 Inserm, Institut Paoli-Calmettes (IPC), Department of Molecular Oncology, Marseille, France
| | - François Bertucci
- Marseille Cancer Research Center (CRCM), UMR891 Inserm, Institut Paoli-Calmettes (IPC), Department of Molecular Oncology, Marseille, France
| | - Mieke M Timmermans
- Department of Medical Oncology, Erasmus MC Cancer Institute, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3000 CA Rotterdam, The Netherlands
| | - Carolien H M van Deurzen
- Department of Medical Oncology, Erasmus MC Cancer Institute, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3000 CA Rotterdam, The Netherlands
| | - John W M Martens
- Department of Medical Oncology, Erasmus MC Cancer Institute, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3000 CA Rotterdam, The Netherlands
| | - Iris Simon
- Research and Development, Agendia BV, Amsterdam, The Netherlands
| | - Paul Roepman
- Research and Development, Agendia BV, Amsterdam, The Netherlands
| | - Sabine C Linn
- The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Peter van Dam
- Translational Cancer Research Unit, GZA Hospitals St-Augustinus, Oosterveldlaan 24, Antwerp B2610, Belgium
| | - Marleen Kok
- The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Filip Lardon
- Department of Medical Oncology, University Hospital Antwerp, Wilrijkstraat 10, B2650 Antwerp, Belgium
| | - Peter B Vermeulen
- Translational Cancer Research Unit, GZA Hospitals St-Augustinus, Oosterveldlaan 24, Antwerp B2610, Belgium
| | - John A Foekens
- Department of Medical Oncology, Erasmus MC Cancer Institute, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3000 CA Rotterdam, The Netherlands
| | - Luc Dirix
- Translational Cancer Research Unit, GZA Hospitals St-Augustinus, Oosterveldlaan 24, Antwerp B2610, Belgium
| | - Els M J J Berns
- Department of Medical Oncology, Erasmus MC Cancer Institute, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3000 CA Rotterdam, The Netherlands
| | - Steven Van Laere
- Translational Cancer Research Unit, GZA Hospitals St-Augustinus, Oosterveldlaan 24, Antwerp B2610, Belgium; Department of Oncology, KU Leuven, Leuven, Belgium
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Braakman RBH, Bezstarosti K, Sieuwerts AM, de Weerd V, van Galen AM, Stingl C, Luider TM, Timmermans MAM, Smid M, Martens JWM, Foekens JA, Demmers JAA, Umar A. Integrative Analysis of Genomics and Proteomics Data on Clinical Breast Cancer Tissue Specimens Extracted with Acid Guanidinium Thiocyanate–Phenol–Chloroform. J Proteome Res 2015; 14:1627-36. [DOI: 10.1021/acs.jproteome.5b00046] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- René B. H. Braakman
- Department
of Medical Oncology, Erasmus MC Cancer Institute, University Medical Center Rotterdam,
Be401, P.O. Box 2040, 3000 CA Rotterdam, The Netherlands
- Postgraduate
School of Molecular Medicine, Erasmus MC, University Medical Center Rotterdam, Dr Molewaterplein 50, 3015 GE Rotterdam, The Netherlands
| | - Karel Bezstarosti
- Proteomics
Center, Erasmus MC, University Medical Center Rotterdam, Dr Molewaterplein
50, 3015 GE Rotterdam, The Netherlands
| | - Anieta M. Sieuwerts
- Department
of Medical Oncology, Erasmus MC Cancer Institute, University Medical Center Rotterdam,
Be401, P.O. Box 2040, 3000 CA Rotterdam, The Netherlands
- Postgraduate
School of Molecular Medicine, Erasmus MC, University Medical Center Rotterdam, Dr Molewaterplein 50, 3015 GE Rotterdam, The Netherlands
| | - Vanja de Weerd
- Department
of Medical Oncology, Erasmus MC Cancer Institute, University Medical Center Rotterdam,
Be401, P.O. Box 2040, 3000 CA Rotterdam, The Netherlands
| | - Anne M. van Galen
- Department
of Medical Oncology, Erasmus MC Cancer Institute, University Medical Center Rotterdam,
Be401, P.O. Box 2040, 3000 CA Rotterdam, The Netherlands
| | - Christoph Stingl
- Department
of Neurology, Erasmus MC, University Medical Center Rotterdam, Dr
Molewaterplein 50, 3015 GE Rotterdam, The Netherlands
| | - Theo M. Luider
- Department
of Neurology, Erasmus MC, University Medical Center Rotterdam, Dr
Molewaterplein 50, 3015 GE Rotterdam, The Netherlands
| | - Mieke A. M. Timmermans
- Department
of Medical Oncology, Erasmus MC Cancer Institute, University Medical Center Rotterdam,
Be401, P.O. Box 2040, 3000 CA Rotterdam, The Netherlands
| | - Marcel Smid
- Department
of Medical Oncology, Erasmus MC Cancer Institute, University Medical Center Rotterdam,
Be401, P.O. Box 2040, 3000 CA Rotterdam, The Netherlands
| | - John W. M. Martens
- Department
of Medical Oncology, Erasmus MC Cancer Institute, University Medical Center Rotterdam,
Be401, P.O. Box 2040, 3000 CA Rotterdam, The Netherlands
- Postgraduate
School of Molecular Medicine, Erasmus MC, University Medical Center Rotterdam, Dr Molewaterplein 50, 3015 GE Rotterdam, The Netherlands
| | - John A. Foekens
- Department
of Medical Oncology, Erasmus MC Cancer Institute, University Medical Center Rotterdam,
Be401, P.O. Box 2040, 3000 CA Rotterdam, The Netherlands
- Postgraduate
School of Molecular Medicine, Erasmus MC, University Medical Center Rotterdam, Dr Molewaterplein 50, 3015 GE Rotterdam, The Netherlands
| | - Jeroen A. A. Demmers
- Proteomics
Center, Erasmus MC, University Medical Center Rotterdam, Dr Molewaterplein
50, 3015 GE Rotterdam, The Netherlands
| | - Arzu Umar
- Department
of Medical Oncology, Erasmus MC Cancer Institute, University Medical Center Rotterdam,
Be401, P.O. Box 2040, 3000 CA Rotterdam, The Netherlands
- Postgraduate
School of Molecular Medicine, Erasmus MC, University Medical Center Rotterdam, Dr Molewaterplein 50, 3015 GE Rotterdam, The Netherlands
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Guo J, Canaff L, Rajadurai CV, Fils-Aimé N, Tian J, Dai M, Korah J, Villatoro M, Park M, Ali S, Lebrun JJ. Breast cancer anti-estrogen resistance 3 inhibits transforming growth factor β/Smad signaling and associates with favorable breast cancer disease outcomes. Breast Cancer Res 2014; 16:476. [PMID: 25499443 PMCID: PMC4311507 DOI: 10.1186/s13058-014-0476-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Accepted: 11/11/2014] [Indexed: 12/20/2022] Open
Abstract
INTRODUCTION This study helps to define the implications of breast cancer anti-estrogen resistance 3 (BCAR3) in breast cancer and extends the current understanding of its molecular mechanism of action. BCAR3 has been shown to promote cell proliferation, migration and attachment to extracellular matrix components. However, in a cohort of metastatic breast cancer patients who received tamoxifen treatment, high BCAR3 mRNA levels were associated with favorable progression-free survival outcome. These results suggest that, besides its established roles, BCAR3 may have additional mechanisms of action that regulate breast cancer aggressive phenotype. In this study, we investigated whether BCAR3 is a novel antagonist of the canonical transforming growth factor β (TGFβ) pathway, which induces potent migration and invasion responses in breast cancer cells. METHODS We surveyed functional genomics databases for correlations between BCAR3 expression and disease outcomes of breast cancer patients. We also studied how BCAR3 could regulate the TGFβ/Smad signaling axis using Western blot analysis, coimmunoprecipitation and luciferase assays. In addition, we examined whether BCAR3 could modulate TGFβ-induced cell migration and invasion by using an automated imaging system and a confocal microscopy imaging-based matrix degradation assay, respectively. RESULTS Relatively low levels of BCAR3 expression in primary breast tumors correlate with poor distant metastasis-free survival and relapse-free survival outcomes. We also found a strong correlation between the loss of heterozygosity at BCAR3 gene alleles and lymph node invasion in human breast cancer, further suggesting a role for BCAR3 in preventing disease progression. In addition, we found BCAR3 to inhibit Smad activation, Smad-mediated gene transcription, Smad-dependent cell migration and matrix digestion in breast cancer cells. Furthermore, we found BCAR3 to be downregulated by TGFβ through proteasome degradation, thus defining a novel positive feedback loop mechanism downstream of the TGFβ/Smad signaling pathway. CONCLUSION BCAR3 is considered to be associated with aggressive breast cancer phenotypes. However, our results indicate that BCAR3 acts as a putative suppressor of breast cancer progression by inhibiting the prometastatic TGFβ/Smad signaling pathway in invasive breast tumors. These data provide new insights into BCAR3's molecular mechanism of action and highlight BCAR3 as a novel TGFβ/Smad antagonist in breast cancer.
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Affiliation(s)
- Jimin Guo
- Division of Medical Oncology, Department of Medicine, McGill University Health Center, H7 Royal Victoria Hospital, 687 Pine Avenue West, Montreal, Quebec, H3A 1A1, Canada.
| | - Lucie Canaff
- Division of Medical Oncology, Department of Medicine, McGill University Health Center, H7 Royal Victoria Hospital, 687 Pine Avenue West, Montreal, Quebec, H3A 1A1, Canada.
| | - Charles Vincent Rajadurai
- Rosalind and Morris Goodman Cancer Center, 1160 Pine Avenue West, Montreal, Quebec, H3A 1A3, Canada.
| | - Nadège Fils-Aimé
- Division of Medical Oncology, Department of Medicine, McGill University Health Center, H7 Royal Victoria Hospital, 687 Pine Avenue West, Montreal, Quebec, H3A 1A1, Canada.
| | - Jun Tian
- Division of Medical Oncology, Department of Medicine, McGill University Health Center, H7 Royal Victoria Hospital, 687 Pine Avenue West, Montreal, Quebec, H3A 1A1, Canada.
| | - Meiou Dai
- Division of Medical Oncology, Department of Medicine, McGill University Health Center, H7 Royal Victoria Hospital, 687 Pine Avenue West, Montreal, Quebec, H3A 1A1, Canada.
| | - Juliana Korah
- Division of Medical Oncology, Department of Medicine, McGill University Health Center, H7 Royal Victoria Hospital, 687 Pine Avenue West, Montreal, Quebec, H3A 1A1, Canada.
| | - Manuel Villatoro
- Division of Medical Oncology, Department of Medicine, McGill University Health Center, H7 Royal Victoria Hospital, 687 Pine Avenue West, Montreal, Quebec, H3A 1A1, Canada.
| | - Morag Park
- Rosalind and Morris Goodman Cancer Center, 1160 Pine Avenue West, Montreal, Quebec, H3A 1A3, Canada.
| | - Suhad Ali
- Division of Hematology, Department of Medicine, McGill University Health Center, H7 Royal Victoria Hospital, 687 Pine Avenue West, Montreal, Quebec, H3A 1A1, Canada.
| | - Jean-Jacques Lebrun
- Division of Medical Oncology, Department of Medicine, McGill University Health Center, H7 Royal Victoria Hospital, 687 Pine Avenue West, Montreal, Quebec, H3A 1A1, Canada.
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Ghosh S, Gu F, Wang CM, Lin CL, Liu J, Wang H, Ravdin P, Hu Y, Huang THM, Li R. Genome-wide DNA methylation profiling reveals parity-associated hypermethylation of FOXA1. Breast Cancer Res Treat 2014; 147:653-9. [PMID: 25234841 DOI: 10.1007/s10549-014-3132-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Accepted: 09/09/2014] [Indexed: 12/23/2022]
Abstract
Early pregnancy in women by the age of 20 is known to have a profound effect on reduction of lifelong breast cancer risk as compared to their nulliparous counterparts. Additional pregnancies further enhance the protection against breast cancer development. Nationwide trend of delayed pregnancy may contribute to the recently reported increase in the incidence of advanced breast cancer among young women in this country. The underlying mechanism for the parity-associated reduction of breast cancer risk is not clearly understood. The purpose of the current study is to use whole-genome DNA methylation profiling to explore a potential association between parity and epigenetic changes in breast tissue from women with early parity and nulliparity. Breast tissue was collected from age-matched cancer-free women with early parity (age < 20; n = 15) or nulliparity (n = 13). The methyl-CpG binding domain-based capture-sequencing technology was used for whole-genome DNA methylation profiling. Potential parity-associated hypermethylated genes were further verified by locus-specific pyrosequencing, using an expanded cohort of parous (n = 19) and nulliparous (n = 16) women that included the initial samples used in the global analysis. Our study identified six genes that are hypermethylated in the parous group (P < 0.05). Pyrosequencing confirmed parity-associated hypermethylation at multiple CpG islands of the FOXA1 gene, which encodes a pioneer factor that facilitates chromatin binding of estrogen receptor α. Our work identifies several potential methylation biomarkers for parity-associated breast cancer risk assessment. In addition, the results are consistent with the notion that parity-associated epigenetic silencing of FOXA1 contributes to long-term attenuation of the estrogenic impact on breast cancer development.
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Affiliation(s)
- Sagar Ghosh
- Department of Molecular Medicine, Cancer Therapy and Research Center, University of Texas Health Science Center at San Antonio, San Antonio, TX, 78229, USA
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Jangal M, Couture JP, Bianco S, Magnani L, Mohammed H, Gévry N. The transcriptional co-repressor TLE3 suppresses basal signaling on a subset of estrogen receptor α target genes. Nucleic Acids Res 2014; 42:11339-48. [PMID: 25223786 PMCID: PMC4191390 DOI: 10.1093/nar/gku791] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Chromatin constitutes a repressive barrier to the process of ligand-dependent transcriptional activity of nuclear receptors. Nucleosomes prevent the binding of estrogen receptor α (ERα) in absence of ligand and thus represent an important level of transcriptional regulation. Here, we show that in breast cancer MCF-7 cells, TLE3, a co-repressor of the Groucho/Grg/TLE family, interacts with FoxA1 and is detected at regulatory elements of ERα target genes in absence of estrogen. As a result, the chromatin is maintained in a basal state of acetylation, thus preventing ligand-independent activation of transcription. In absence of TLE3, the basal expression of ERα target genes induced by E2 is increased. At the TFF1 gene, the recruitment of TLE3 to the chromatin is FoxA1-dependent and prevents ERα and RNA polymerase II recruitment to TFF1 gene regulatory elements. Moreover, the interaction of TLE3 with HDAC2 results in the maintenance of acetylation at a basal level. We also provide evidence that TLE3 is recruited at several other regulatory elements of ERα target genes and is probably an important co-regulator of the E2 signaling pathway. In sum, our results describe a mechanism by which TLE3 affects ligand dependency in ERα-regulated gene expression via its binding restricting function and its role in gene regulation by histone acetylation.
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Affiliation(s)
- Maïka Jangal
- Département de biologie, Faculté des sciences, Université de Sherbrooke, 2500 boulevard de l'Université, Sherbrooke, Québec J1K 2R1, Canada
| | - Jean-Philippe Couture
- Département de biologie, Faculté des sciences, Université de Sherbrooke, 2500 boulevard de l'Université, Sherbrooke, Québec J1K 2R1, Canada
| | - Stéphanie Bianco
- Département de biologie, Faculté des sciences, Université de Sherbrooke, 2500 boulevard de l'Université, Sherbrooke, Québec J1K 2R1, Canada
| | - Luca Magnani
- Department of Surgery and Cancer, Imperial Centre for Translational and Experimental Medecine, Imperial College Hammersmith, London W12 0NN, UK
| | - Hisham Mohammed
- Cancer Research UK Cambridge Research Institute, Li Ka Shing Centre, Robinson way, Cambridge CB2 0RE, UK
| | - Nicolas Gévry
- Département de biologie, Faculté des sciences, Université de Sherbrooke, 2500 boulevard de l'Université, Sherbrooke, Québec J1K 2R1, Canada
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Pérez-Tenorio G, Karlsson E, Stål O. Clinical value of isoform-specific detection and targeting of AKT1, AKT2 and AKT3 in breast cancer. BREAST CANCER MANAGEMENT 2014. [DOI: 10.2217/bmt.14.35] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
SUMMARY Overactivation of the PI3K/AKT signaling pathway is frequently reported in breast cancer, consequently inhibitors targeting this pathway are clinically useful. AKT constitutes a hub in the regulation of several cancer hallmarks, such as proliferation, survival and migration. Three AKT isoforms, named AKT1, AKT2 and AKT3, are identified in humans. AKT alterations, mainly upregulation of phosphorylated AKT in tumors may have prognostic and predictive value. Moreover, the AKT isoforms may possess partly divergent cellular functions and be upregulated in certain breast cancer subtypes, suggesting the importance of isoform-specific analyses. In conclusion, AKT isoform-specific detection and targeting in different tumor subtypes will hopefully result into a further developed personalized medicine.
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Affiliation(s)
- Gizeh Pérez-Tenorio
- Department of Clinical & Experimental Medicine & Department of Oncology, Linköping University, Linköping, SE-58185, Sweden
| | - Elin Karlsson
- Department of Clinical & Experimental Medicine & Department of Oncology, Linköping University, Linköping, SE-58185, Sweden
| | - Olle Stål
- Department of Clinical & Experimental Medicine & Department of Oncology, Linköping University, Linköping, SE-58185, Sweden
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Sieuwerts AM, Lyng MB, Meijer-van Gelder ME, de Weerd V, Sweep FCGJ, Foekens JA, Span PN, Martens JWM, Ditzel HJ. Evaluation of the ability of adjuvant tamoxifen-benefit gene signatures to predict outcome of hormone-naive estrogen receptor-positive breast cancer patients treated with tamoxifen in the advanced setting. Mol Oncol 2014; 8:1679-89. [PMID: 25081647 DOI: 10.1016/j.molonc.2014.07.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2014] [Accepted: 07/02/2014] [Indexed: 02/01/2023] Open
Abstract
To identify molecular markers indicative of response to tamoxifen and easily implemented in the routine setting, we recently reported three gene signatures that could stratify post-menopausal tamoxifen-treated, estrogen receptor-positive (ER+) patients according to outcome in the adjuvant setting. Here, we evaluated the predictive potential of the total of 14 genes included in the 3 gene signatures using 2 hormone-naïve Dutch ER+ cohorts of a total of 285 recurrent breast cancer patients treated with first-line tamoxifen. mRNA levels were measured by reverse transcriptase quantitative PCR (RT-qPCR) and the length of progression-free survival (PFS) was used as the primary endpoint. A Mann-Whitney U test was used to select for differentially expressed genes between tumors of patients who showed or did not show progressive disease within 6 months after start of tamoxifen treatment. Cox univariate and multivariate regression analysis for PFS were used to further assess their (independent) predictive potential. Five (BCAR3, BCL2, ESR1, IGF1R, and NCOA1) of the 14 genes analyzed showed significantly higher mRNA levels in tumors of patients who showed no disease progression within 6 months. Only BCAR3, BCL2 and NAT1 were significantly associated with a favorable PFS in multivariate analysis that included the traditional predictive factors: age, dominant relapse site, disease-free interval, ER and progesterone receptor (PGR), and adjuvant chemotherapy. This study shows that BCAR3, BCL2 and NAT1 in particular exhibit predictive promise regarding the efficacy of tamoxifen treatment in recurrent disease, in addition to the previously shown favorable outcome in the adjuvant setting.
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Affiliation(s)
- Anieta M Sieuwerts
- Department of Medical Oncology, Erasmus MC Cancer Institute, Erasmus University Medical Center and Cancer Genomics Netherlands, P.O. Box 2040, 3000 CA Rotterdam, The Netherlands.
| | - Maria B Lyng
- Institute of Molecular Medicine, University of Southern Denmark, Odense, Denmark
| | - Marion E Meijer-van Gelder
- Department of Medical Oncology, Erasmus MC Cancer Institute, Erasmus University Medical Center and Cancer Genomics Netherlands, P.O. Box 2040, 3000 CA Rotterdam, The Netherlands
| | - Vanja de Weerd
- Department of Medical Oncology, Erasmus MC Cancer Institute, Erasmus University Medical Center and Cancer Genomics Netherlands, P.O. Box 2040, 3000 CA Rotterdam, The Netherlands
| | - Fred C G J Sweep
- Department of Laboratory Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
| | - John A Foekens
- Department of Medical Oncology, Erasmus MC Cancer Institute, Erasmus University Medical Center and Cancer Genomics Netherlands, P.O. Box 2040, 3000 CA Rotterdam, The Netherlands
| | - Paul N Span
- Department of Radiation Oncology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - John W M Martens
- Department of Medical Oncology, Erasmus MC Cancer Institute, Erasmus University Medical Center and Cancer Genomics Netherlands, P.O. Box 2040, 3000 CA Rotterdam, The Netherlands
| | - Henrik J Ditzel
- Institute of Molecular Medicine, University of Southern Denmark, Odense, Denmark; Department of Oncology, Odense University Hospital, Odense, Denmark
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Span P, Pollakis G, Paxton W, Sweep F, Foekens J, Martens J, Sieuwerts A, van Laarhoven H. Improved metastasis-free survival in nonadjuvantly treated postmenopausal breast cancer patients with chemokine receptor 5 del32 frameshift mutations. Int J Cancer 2014; 136:91-7. [DOI: 10.1002/ijc.28962] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Accepted: 04/24/2014] [Indexed: 11/10/2022]
Affiliation(s)
- P.N. Span
- Department of Radiation Oncology; Radboud University Medical Center; Nijmegen The Netherlands
| | - G. Pollakis
- Laboratory of Experimental Virology; Academic Medical Center, University of Amsterdam; Amsterdam The Netherlands
- Department of Clinical Infection Microbiology and Immunology; IGH, University of Liverpool; Liverpool United Kingdom
| | - W.A. Paxton
- Laboratory of Experimental Virology; Academic Medical Center, University of Amsterdam; Amsterdam The Netherlands
- Department of Clinical Infection Microbiology and Immunology; IGH, University of Liverpool; Liverpool United Kingdom
| | - F.C.G.J. Sweep
- Department of Laboratory Medicine; Radboud University Medical Center; Nijmegen The Netherlands
| | - J.A. Foekens
- Department of Medical Oncology; Erasmus MC Cancer Institute, Erasmus University Medical Center, and Cancer Genomics Netherlands; Rotterdam The Netherlands
| | - J.W.M. Martens
- Department of Medical Oncology; Erasmus MC Cancer Institute, Erasmus University Medical Center, and Cancer Genomics Netherlands; Rotterdam The Netherlands
| | - A.M. Sieuwerts
- Department of Medical Oncology; Erasmus MC Cancer Institute, Erasmus University Medical Center, and Cancer Genomics Netherlands; Rotterdam The Netherlands
| | - H.W.M. van Laarhoven
- Department of Medical Oncology; Academic Medical Center, University of Amsterdam; Amsterdam The Netherlands
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Moerkens M, Zhang Y, Wester L, van de Water B, Meerman JHN. Epidermal growth factor receptor signalling in human breast cancer cells operates parallel to estrogen receptor α signalling and results in tamoxifen insensitive proliferation. BMC Cancer 2014; 14:283. [PMID: 24758408 PMCID: PMC4021213 DOI: 10.1186/1471-2407-14-283] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2014] [Accepted: 04/08/2014] [Indexed: 02/07/2023] Open
Abstract
Background Tamoxifen resistance is a major problem in the treatment of estrogen receptor (ER) α -positive breast cancer patients. Although the mechanisms behind tamoxifen resistance are still not completely understood, clinical data suggests that increased expression of receptor tyrosine kinases is involved. Here, we studied the estrogen and anti-estrogen sensitivity of human breast cancer MCF7 cells that have a moderate, retroviral-mediated, ectopic expression of epidermal growth factor receptor (MCF7-EGFR). Methods Proliferation of MCF7-EGFR and parental cells was induced by 17β-estradiol (E2), epidermal growth factor (EGF) or a combination of these. Inhibition of proliferation under these conditions was investigated with 4-hydroxy-tamoxifen (TAM) or fulvestrant at 10-12 to 10-6 M. Cells were lysed at different time points to determine the phosphorylation status of EGFR, MAPK1/3, AKT and the expression of ERα. Knockdown of target genes was established using smartpool siRNAs. Transcriptomics analysis was done 6 hr after stimulation with growth factors using Affymetrix HG-U133 PM array plates. Results While proliferation of parental MCF7 cells could only be induced by E2, proliferation of MCF7-EGFR cells could be induced by either E2 or EGF. Treatment with TAM or fulvestrant did significantly inhibit proliferation of MCF7-EGFR cells stimulated with E2 alone. EGF treatment of E2/TAM treated cells led to a marked cell proliferation thereby overruling the anti-estrogen-mediated inhibition of cell proliferation. Under these conditions, TAM however did still inhibit ERα- mediated transcription. While siRNA-mediated knock-down of EGFR inhibited the EGF- driven proliferation under TAM/E2/EGF condition, knock down of ERα did not. The TAM resistant cell proliferation mediated by the conditional EGFR-signaling may be dependent on the PI3K/Akt pathway but not the MEK/MAPK pathway, since a MEK inhibitor (U0126), did not block the proliferation. Transcriptomic analysis under the various E2/TAM/EGF conditions revealed that E2 and EGF dependent transcription have little overlap and rather operate in a parallel fashion. Conclusions Our data indicate that enhanced EGFR-driven signalling is sufficient to overrule the TAM- mediated inhibition of E2-driven cell proliferation. This may have profound implications for the anti-estrogen treatment of ER-positive breast cancers that have increased levels of EGFR.
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Affiliation(s)
| | | | | | | | - John H N Meerman
- Leiden Academic Centre for Drug Research (LACDR), Department of Toxicology, Leiden University, Einsteinweg 55, 2333 CC Leiden The Netherlands.
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40
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Aiad HA, Wahed MMAE, Asaad NY, El-Tahmody M, Elhosary E. Immunohistochemical expression of GPR30 in breast carcinoma of Egyptian patients: an association with immunohistochemical subtypes. APMIS 2014; 122:976-84. [PMID: 24628533 DOI: 10.1111/apm.12241] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2013] [Accepted: 12/02/2013] [Indexed: 11/27/2022]
Abstract
Breast carcinoma in Egyptian women is a biologically more aggressive disease than those diagnosed in Western women, although a substantial number of cases are hormone responsive. G protein-coupled receptor-30 (GPR30), a seven transmembrane domain protein, is currently recognized as an estrogen receptor. This study aimed at evaluating the expression of GPR30 in breast carcinomas of Egyptian patients and its association with clinicopathologic parameters and immunohistochemical subtypes of breast carcinoma. Immunohistochemical staining for GPR30 was applied on 51 archival formalin-fixed paraffin-embedded cases of invasive ductal carcinoma. Staining was assessed using a semiquantitative scoring system taking staining intensity and extent into consideration. GPR30 was observed in 33/51 (65%) of invasive ductal carcinoma cases. GPR30 was significantly associated with larger tumor size (p = 0.009), increased number of positive lymph nodes (p = 0.04), definite lymph-vascular invasion (LVI) (p = 0.002), peri-nodal invasion (p = 0.02), and the presence of coagulative tumor cell necrosis (p = 0.02). Moreover, a significant association between positive GPR30 expression and ER positivity (p = 0.02), as well as HER2/neu positivity (p = 0.03), were also observed. Most of the luminal A and B subtypes were GPR30 positive; however, all the triple negative cases were GPR30 negative (p = 0.010). GPR30 might contribute to the aggressive behavior of Egyptian breast carcinoma. Therefore, it could be useful in the therapeutic decision making in breast cancer patients.
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Affiliation(s)
- Hayam A Aiad
- Department of Pathology, Faculty of Medicine, Menoufia University, Menoufia, Egypt
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Oida K, Matsuda A, Jung K, Xia Y, Jang H, Amagai Y, Ahn G, Nishikawa S, Ishizaka S, Jensen-Jarolim E, Matsuda H, Tanaka A. Nuclear factor-ĸB plays a critical role in both intrinsic and acquired resistance against endocrine therapy in human breast cancer cells. Sci Rep 2014; 4:4057. [PMID: 24531845 PMCID: PMC3925966 DOI: 10.1038/srep04057] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2013] [Accepted: 01/22/2014] [Indexed: 02/07/2023] Open
Abstract
Since more than 75% of breast cancers overexpress estrogen receptors (ER), endocrine therapy targeting ER has significantly improved the survival rate. Nonetheless, breast cancer still afflicts women worldwide and the major problem behind it is resistance to endocrine therapy. We have previously shown the involvement of nuclear factor-κB (NF-κB) in neoplastic proliferation of human breast cancer cells; however, the association with the transformation of ER-positive cells remains unclear. In the current study, we focused on roles of NF-κB in the hormone dependency of breast cancers by means of ER-positive MCF-7 cells. Blocking of NF-κB signals in ER-negative cells stopped proliferation by downregulation of D-type cyclins. In contrast, the MCF-7 cells were resistant to NF-κB inhibition. Under estrogen-free conditions, the ER levels were reduced when compared with the original MCF-7 cells and the established cell subline exhibited tamoxifen resistance. Additionally, NF-κB participated in cell growth instead of the estrogen-ER axis in the subline and consequently, interfering with the NF-κB signals induced additive anticancer effects with tamoxifen. MMP-9 production responsible for cell migration, as well as the cell expansion in vivo, were suppressed by NF-κB inhibition. Therefore, we suggest that NF-κB is a master switch in both ER-positive and ER-negative breast cancers.
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Affiliation(s)
- Kumiko Oida
- 1] Cooperative Major in Advanced Health Science, Graduate School of Bio-Applications and System Engineering, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan [2] Comparative Medicine, Messerli Research Institute of the University of Veterinary Medicine Vienna, Medical University of Vienna, University of Vienna, Veterinaerplatz 1, 1210 Vienna, Austria
| | - Akira Matsuda
- Laboratory of Veterinary Molecular Pathology and Therapeutics, Division of Animal Life Science, Institute of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
| | - Kyungsook Jung
- Laboratory of Comparative Animal Medicine, Division of Animal Life Science, Institute of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
| | - Yan Xia
- Cooperative Major in Advanced Health Science, Graduate School of Bio-Applications and System Engineering, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
| | - Hyosun Jang
- Cooperative Major in Advanced Health Science, Graduate School of Bio-Applications and System Engineering, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
| | - Yosuke Amagai
- Cooperative Major in Advanced Health Science, Graduate School of Bio-Applications and System Engineering, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
| | - Ginnae Ahn
- Laboratory of Comparative Animal Medicine, Division of Animal Life Science, Institute of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
| | - Sho Nishikawa
- Cooperative Major in Advanced Health Science, Graduate School of Bio-Applications and System Engineering, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
| | - Saori Ishizaka
- Cooperative Major in Advanced Health Science, Graduate School of Bio-Applications and System Engineering, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
| | - Erika Jensen-Jarolim
- 1] Comparative Medicine, Messerli Research Institute of the University of Veterinary Medicine Vienna, Medical University of Vienna, University of Vienna, Veterinaerplatz 1, 1210 Vienna, Austria [2] Comparative Immunology and Oncology, Institute of Pathophysiology and Allergy Research, Center of Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Waehringer Guertel 18-20, A-1090 Vienna, Austria
| | - Hiroshi Matsuda
- 1] Cooperative Major in Advanced Health Science, Graduate School of Bio-Applications and System Engineering, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan [2] Laboratory of Veterinary Molecular Pathology and Therapeutics, Division of Animal Life Science, Institute of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
| | - Akane Tanaka
- 1] Cooperative Major in Advanced Health Science, Graduate School of Bio-Applications and System Engineering, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan [2] Laboratory of Comparative Animal Medicine, Division of Animal Life Science, Institute of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
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Nagelkerke A, Sieuwerts AM, Bussink J, Sweep FCGJ, Look MP, Foekens JA, Martens JWM, Span PN. LAMP3 is involved in tamoxifen resistance in breast cancer cells through the modulation of autophagy. Endocr Relat Cancer 2014; 21:101-12. [PMID: 24434718 DOI: 10.1530/erc-13-0183] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Lysosome-associated membrane protein 3 (LAMP3) is a member of the LAMP-family of proteins, which are involved in the process of autophagy. Autophagy is induced by tamoxifen in breast cancer cells and may contribute to tamoxifen resistance. In this study, the significance of LAMP3 for tamoxifen resistance in breast cancer was examined. The methods employed included use of clonogenic assays to assess the survival of MCF7 breast cancer cells with LAMP3 knockdown after tamoxifen treatment and of quantitative real-time PCR of LAMP3 to evaluate its predictive value for first-line tamoxifen treatment in patients with advanced breast cancer. Results show that tamoxifen treatment of MCF7 cells induced LAMP3 mRNA expression. LAMP3 knockdown in these cells increased tamoxifen sensitivity. Evaluation of expression of the autophagy markers, LC3B and p62, after LAMP3 knockdown showed increased expression levels, indicating that cells with LAMP3 knockdown have a suppressed ability to complete the autophagic process. In addition, knockdown of autophagy-associated genes resulted in sensitization to tamoxifen. Next, tamoxifen-resistant MCF7 cells were cultured. These cells had a sevenfold higher LAMP3 mRNA expression, showed elevated basal autophagy levels, and could be significantly resensitized to tamoxifen by LAMP3 knockdown. In patients treated with first-line tamoxifen for advanced disease (n=304), high LAMP3 mRNA expression was associated with shorter progression-free survival (P=0.003) and shorter post-relapse overall survival (P=0.040), also in multivariate analysis. Together, these results indicate that LAMP3 contributes to tamoxifen resistance in breast cancer. Tamoxifen-resistant cells are resensitized to tamoxifen by the knockdown of LAMP3. Therefore, LAMP3 may be clinically relevant to countering tamoxifen resistance in breast cancer patients.
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Affiliation(s)
- Anika Nagelkerke
- Departments of Radiation Oncology, Laboratory Medicine, Radboud University Nijmegen Medical Centre, PO Box 9101, 6500 HB Nijmegen, The Netherlands Department of Medical Oncology, Erasmus MC Cancer Institute and Cancer Genomics Netherlands, PO Box 2040, 3000 CA Rotterdam, The Netherlands
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Retinoic acid receptor alpha is associated with tamoxifen resistance in breast cancer. Nat Commun 2014; 4:2175. [PMID: 23868472 PMCID: PMC3759040 DOI: 10.1038/ncomms3175] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2013] [Accepted: 06/20/2013] [Indexed: 02/07/2023] Open
Abstract
About one-third of oestrogen receptor alpha-positive breast cancer patients treated with tamoxifen relapse. Here we identify the nuclear receptor retinoic acid receptor alpha as a marker of tamoxifen resistance. Using quantitative mass spectrometry-based proteomics, we show that retinoic acid receptor alpha protein networks and levels differ in a tamoxifen-sensitive (MCF7) and a tamoxifen-resistant (LCC2) cell line. High intratumoural retinoic acid receptor alpha protein levels also correlate with reduced relapse-free survival in oestrogen receptor alpha-positive breast cancer patients treated with adjuvant tamoxifen solely. A similar retinoic acid receptor alpha expression pattern is seen in a comparable independent patient cohort. An oestrogen receptor alpha and retinoic acid receptor alpha ligand screening reveals that tamoxifen-resistant LCC2 cells have increased sensitivity to retinoic acid receptor alpha ligands and are less sensitive to oestrogen receptor alpha ligands compared with MCF7 cells. Our data indicate that retinoic acid receptor alpha may be a novel therapeutic target and a predictive factor for oestrogen receptor alpha-positive breast cancer patients treated with adjuvant tamoxifen.
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LeBeau AM, Sevillano N, King ML, Duriseti S, Murphy ST, Craik CS, Murphy LL, VanBrocklin HF. Imaging the urokinase plasminongen activator receptor in preclinical breast cancer models of acquired drug resistance. Am J Cancer Res 2014; 4:267-79. [PMID: 24505235 PMCID: PMC3915090 DOI: 10.7150/thno.7323] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2013] [Accepted: 12/15/2013] [Indexed: 11/30/2022] Open
Abstract
Subtype-targeted therapies can have a dramatic impact on improving the quality and quantity of life for women suffering from breast cancer. Despite an initial therapeutic response, cancer recurrence and acquired drug-resistance are commonplace. Non-invasive imaging probes that identify drug-resistant lesions are urgently needed to aid in the development of novel drugs and the effective utilization of established therapies for breast cancer. The protease receptor urokinase plasminogen activator receptor (uPAR) is a target that can be exploited for non-invasive imaging. The expression of uPAR has been associated with phenotypically aggressive breast cancer and acquired drug-resistance. Acquired drug-resistance was modeled in cell lines from two different breast cancer subtypes, the uPAR negative luminal A subtype and the uPAR positive triple negative subtype cell line MDA-MB-231. MCF-7 cells, cultured to be resistant to tamoxifen (MCF-7 TamR), were found to significantly over-express uPAR compared to the parental cell line. uPAR expression was maintained when resistance was modeled in triple-negative breast cancer by generating doxorubicin and paclitaxel resistant MDA-MB-231 cells (MDA-MB-231 DoxR and MDA-MB-231 TaxR). Using the antagonistic uPAR antibody 2G10, uPAR was imaged in vivo by near-infrared (NIR) optical imaging and 111In-single photon emission computed tomography (SPECT). Tumor uptake of the 111In-SPECT probe was high in the three drug-resistant xenografts (> 46 %ID/g) and minimal in uPAR negative xenografts at 72 hours post-injection. This preclinical study demonstrates that uPAR can be targeted for imaging breast cancer models of acquired resistance leading to potential clinical applications.
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Liu NQ, Stingl C, Look MP, Smid M, Braakman RBH, De Marchi T, Sieuwerts AM, Span PN, Sweep FCGJ, Linderholm BK, Mangia A, Paradiso A, Dirix LY, Van Laere SJ, Luider TM, Martens JWM, Foekens JA, Umar A. Comparative proteome analysis revealing an 11-protein signature for aggressive triple-negative breast cancer. J Natl Cancer Inst 2014; 106:djt376. [PMID: 24399849 PMCID: PMC3952199 DOI: 10.1093/jnci/djt376] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Background Clinical outcome of patients with triple-negative breast cancer (TNBC) is highly variable. This study aims to identify and validate a prognostic protein signature for TNBC patients to reduce unnecessary adjuvant systemic therapy. Methods Frozen primary tumors were collected from 126 lymph node–negative and adjuvant therapy–naive TNBC patients. These samples were used for global proteome profiling in two series: an in-house training (n = 63) and a multicenter test (n = 63) set. Patients who remained free of distant metastasis for a minimum of 5 years after surgery were defined as having good prognosis. Cox regression analysis was performed to develop a prognostic signature, which was independently validated. All statistical tests were two-sided. Results An 11-protein signature was developed in the training set (median follow-up for good-prognosis patients = 117 months) and subsequently validated in the test set (median follow-up for good-prognosis patients = 108 months) showing 89.5% sensitivity (95% confidence interval [CI] = 69.2% to 98.1%), 70.5% specificity (95% CI = 61.7% to 74.2%), 56.7% positive predictive value (95% CI = 43.8% to 62.1%), and 93.9% negative predictive value (95% CI = 82.3% to 98.9%) for poor-prognosis patients. The predicted poor-prognosis patients had higher risk to develop distant metastasis than the predicted good-prognosis patients in univariate (hazard ratio [HR] = 13.15; 95% CI = 3.03 to 57.07; P = .001) and multivariable (HR = 12.45; 95% CI = 2.67 to 58.11; P = .001) analysis. Furthermore, the predicted poor-prognosis group had statistically significantly more breast cancer–specific mortality. Using our signature as guidance, more than 60% of patients would have been exempted from unnecessary adjuvant chemotherapy compared with conventional prognostic guidelines. Conclusions We report the first validated proteomic signature to assess the natural course of clinical TNBC.
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Affiliation(s)
- Ning Qing Liu
- Affiliations of authors: Department of Medical Oncology, Erasmus MC Cancer Institute, Rotterdam, The Netherlands (NQL, MPL, MS, RBHB, TDM, AMS, JWMM, JAF, AU); Department of Neurology (CS, TML) and Postgraduate School of Molecular Medicine (NQL, RBHB, TDM, AMS, JWMM, JAF, AU), Erasmus University Medical Center, Rotterdam, The Netherlands; Department of Radiation Oncology (PNS) and Department of Laboratory Medicine (FCGJS), Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands; Department of Oncology, Sahlgrenska University Hospital, Gothenburg, Sweden (BKL); Department of Oncology/Pathology, Karolinska Institute, Stockholm, Sweden (BKL); Clinical Experimental Oncology Laboratory, National Cancer Centre Giovanni Paolo II, Bari, Italy (AM, AP); Translational Cancer Research Unit, Oncology Center, GZA Hospitals St-Augustinus, Antwerp, Belgium (LYD, SJVL); Netherlands Proteomics Centre, Utrecht, The Netherlands (NQL, AU); Cancer Genomics Centre, Utrecht, The Netherlands (MS, AMS, JWMM, JAF, AU); Center for Translational Molecular Medicine, Eindhoven, The Netherlands (RBHB, JAF, AU)
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Mo Z, Liu M, Yang F, Luo H, Li Z, Tu G, Yang G. GPR30 as an initiator of tamoxifen resistance in hormone-dependent breast cancer. Breast Cancer Res 2013; 15:R114. [PMID: 24289103 PMCID: PMC3978564 DOI: 10.1186/bcr3581] [Citation(s) in RCA: 91] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2012] [Accepted: 11/14/2013] [Indexed: 01/23/2023] Open
Abstract
Introduction Tamoxifen is widely used to treat hormone-dependent breast cancer, but its therapeutic benefit is limited by the development of drug resistance. Here, we investigated the role of estrogen G-protein coupled receptor 30 (GPR30) on Tamoxifen resistance in breast cancer. Methods Primary tumors (PTs) of breast cancer and corresponding metastases (MTs) were used to evaluate the expression of GPR30 and epidermal growth factor receptor (EGFR) immunohistochemically. Tamoxifen-resistant (TAM-R) subclones derived from parent MCF-7 cells were used to investigate the role of GPR30 in the development of tamoxifen resistance, using MTT assay, western blot, RT-PCR, immunofluorescence, ELISA and flow cytometry. TAM-R xenografts were established to assess anti-tumor effects of combination therapy with GPR30 antagonist G15 plus 4-hydroxytamoxifen (Tam), using tumor volume measurement and Terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL). Results In 53 human breast cancer specimens, GPR30 expression in MTs increased compared to matched PTs; in MTs, the expression patterns of GPR30 and EGFR were closely related. Compared to parent MCF-7 cells, TAM-R cells had greater growth responses to 17β-estradiol (E2), GPR30 agonist G1 and Tam, and significantly higher activation of Mitogen-activated protein (MAP) kinases; but this increased activity was abolished by G15 or AG1478. In TAM-R cells, GPR30 cell-surface translocation facilitated crosstalk with EGFR, and reduced cAMP generation, attenuating inhibition of EGFR signaling. Combination therapy both promoted apoptosis in TAM-R cells and decreased drug-resistant tumor progression. Conclusions Long-term endocrine treatment facilitates the translocation of GPR30 to cell surfaces, which interferes with the EGFR signaling pathway; GPR30 also attenuates the inhibition of MAP kinases. These factors contribute to tamoxifen resistance development in breast cancer. Combination therapy with GPR30 inhibitors and tamoxifen may provide a new therapeutic option for drug-resistant breast cancer.
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Hatami R, Sieuwerts AM, Izadmehr S, Yao Z, Qiao RF, Papa L, Look MP, Smid M, Ohlssen J, Levine AC, Germain D, Burstein D, Kirschenbaum A, DiFeo A, Foekens JA, Narla G. KLF6-SV1 drives breast cancer metastasis and is associated with poor survival. Sci Transl Med 2013; 5:169ra12. [PMID: 23345610 DOI: 10.1126/scitranslmed.3004688] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Metastasis is the major cause of cancer mortality. A more thorough understanding of the mechanisms driving this complex multistep process will aid in the identification and characterization of therapeutically targetable genetic drivers of disease progression. We demonstrate that KLF6-SV1, an oncogenic splice variant of the KLF6 tumor suppressor gene, is associated with increased metastatic potential and poor survival in a cohort of 671 lymph node-negative breast cancer patients. KLF6-SV1 overexpression in mammary epithelial cell lines resulted in an epithelial-to-mesenchymal-like transition and drove aggressive multiorgan metastatic disease in multiple in vivo models. Additionally, KLF6-SV1 loss-of-function studies demonstrated reversion to an epithelial and less invasive phenotype. Combined, these findings implicate KLF6-SV1 as a key driver of breast cancer metastasis that distinguishes between indolent and lethal early-stage disease and provides a potential therapeutic target for invasive breast cancer.
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Affiliation(s)
- Raheleh Hatami
- Department of Genetics and Genomic Sciences, Mount Sinai School of Medicine, New York, NY 10029, USA
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Antoon JW, Martin EC, Lai R, Salvo VA, Tang Y, Nitzchke AM, Elliott S, Nam SY, Xiong W, Rhodes LV, Collins-Burow B, David O, Wang G, Shan B, Beckman BS, Nephew KP, Burow ME. MEK5/ERK5 signaling suppresses estrogen receptor expression and promotes hormone-independent tumorigenesis. PLoS One 2013; 8:e69291. [PMID: 23950888 PMCID: PMC3739787 DOI: 10.1371/journal.pone.0069291] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2012] [Accepted: 06/12/2013] [Indexed: 01/20/2023] Open
Abstract
Endocrine resistance and metastatic progression are primary causes of treatment failure in breast cancer. While mitogen activated protein kinases (MAPKs) are known to promote ligand-independent cell growth, the role of the MEK5-ERK5 pathway in the progression of clinical breast carcinoma remains poorly understood. Here, we demonstrated increased ERK5 activation in 30 of 39 (76.9%) clinical tumor samples, as well as across breast cancer cell systems. Overexpression of MEK5 in MCF-7 cells promoted both hormone-dependent and hormone-independent tumorigenesis in vitro and in vivo and conferred endocrine therapy resistance to previously sensitive breast cancer cells. Expression of MEK5 suppressed estrogen receptor (ER)α, but not ER-β protein levels, and abrogated downstream estrogen response element (ERE) transcriptional activity and ER-mediated gene transcription. Global gene expression changes associated with upregulation of MEK5 included increased activation of ER-α independent growth signaling pathways and promotion of epithelial-to-mesenchymal transition (EMT) markers. Taken together, our findings show that the MEK5-ERK5 pathway mediates progression to an ER(-), mesenchymal and endocrine therapy resistant phenotype. Given the need for new clinical therapeutic targets, our results demonstrate the therapeutic potential of targeting the MEK5-ERK5 pathway in breast cancer.
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Affiliation(s)
- James W. Antoon
- Department of Pharmacology, Tulane University School of Medicine, New Orleans, Louisiana, United States of America
| | - Elizabeth C. Martin
- Department of Medicine, Section of Hematology & Medical Oncology, Tulane University School of Medicine, New Orleans, Louisiana, United States of America
| | - Rongye Lai
- Department of Cellular and Integrative Physiology, Indiana University School of Medicine, Bloomington, Indiana, United States of America
| | - Virgilo A. Salvo
- Department of Medicine, Section of Hematology & Medical Oncology, Tulane University School of Medicine, New Orleans, Louisiana, United States of America
| | - Yan Tang
- Department of Pharmacology, Tulane University School of Medicine, New Orleans, Louisiana, United States of America
| | - Ashley M. Nitzchke
- Department of Medicine, Section of Hematology & Medical Oncology, Tulane University School of Medicine, New Orleans, Louisiana, United States of America
| | - Steven Elliott
- Department of Medicine, Section of Hematology & Medical Oncology, Tulane University School of Medicine, New Orleans, Louisiana, United States of America
| | - Seung Yoon Nam
- Department of Chemistry, Xavier University, New Orleans, Louisiana, United States of America
| | - Wei Xiong
- Department of Pharmacology, Tulane University School of Medicine, New Orleans, Louisiana, United States of America
| | - Lyndsay V. Rhodes
- Department of Medicine, Section of Hematology & Medical Oncology, Tulane University School of Medicine, New Orleans, Louisiana, United States of America
| | - Bridgette Collins-Burow
- Department of Medicine, Section of Hematology & Medical Oncology, Tulane University School of Medicine, New Orleans, Louisiana, United States of America
| | - Odile David
- Department of Pathology, Tulane University School of Medicine, New Orleans, Louisiana, United States of America
| | - Guandi Wang
- Department of Chemistry, Xavier University, New Orleans, Louisiana, United States of America
| | - Bin Shan
- Department of Pulmonary Diseases, Critical Care, and Environmental Medicine, Tulane University School of Medicine, New Orleans, Louisiana, United States of America
| | - Barbara S. Beckman
- Department of Pharmacology, Tulane University School of Medicine, New Orleans, Louisiana, United States of America
| | - Kenneth P. Nephew
- Department of Cellular and Integrative Physiology, Indiana University School of Medicine, Bloomington, Indiana, United States of America
| | - Matthew E. Burow
- Department of Pharmacology, Tulane University School of Medicine, New Orleans, Louisiana, United States of America
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Broselid S, Cheng B, Sjöström M, Lövgren K, Klug-De Santiago HLP, Belting M, Jirström K, Malmström P, Olde B, Bendahl PO, Hartman L, Fernö M, Leeb-Lundberg LMF. G protein-coupled estrogen receptor is apoptotic and correlates with increased distant disease-free survival of estrogen receptor-positive breast cancer patients. Clin Cancer Res 2013; 19:1681-92. [PMID: 23554355 DOI: 10.1158/1078-0432.ccr-12-2376] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE G protein-coupled estrogen receptor 1 (GPER1), previously named GPR30, is a membrane receptor reported to mediate nongenomic estrogen responses. We investigated if GPER1 expression correlates with any clinicopathologic variables and distant disease-free survival (DDFS) in patients with breast cancer, if any prognostic impact of the receptor is dependent on estrogen receptor-α (ER-α) status, and if the receptor impacts apoptotic signaling in ER-positive breast cancer cells. EXPERIMENTAL DESIGN GPER1 expression was analyzed by immunohistochemistry in breast tumors from 273 pre- and postmenopausal stage II patients, all treated with adjuvant tamoxifen for 2 years (cohort I) and from 208 premenopausal lymph node-negative patients, of which 87% were not subjected to any adjuvant systemic treatment (cohort II). GPER1-dependent proapoptotic signaling was analyzed in MCF7 cells with and without GPER1 knockdown, T47D cells, HEK293 cells (HEK), and HEK stably expressing GPER1 (HEK-R). RESULTS GPER1 positively correlates with ER and progesterone receptor expression. Multivariate analysis showed that GPER1 is an independent prognostic marker of increased 10-year DDFS in the ER-positive subgroup. HEK-R has higher basal proapoptotic signaling compared with HEK including increased cytochrome C release, caspase-3 cleavage, PARP cleavage, and decreased cell viability. Treating HEK-R with the proteasome inhibitor epoxomicin, to decrease GPER1 degradation, further increases receptor-dependent proapoptotic signaling. Also, GPER1 knockdown decreases basal and agonist-stimulated proapoptotic receptor signaling in MCF7 cells. CONCLUSIONS GPER1 is a prognostic indicator for increased DDFS in ER-positive breast cancer, which may be associated with constitutive GPER1-dependent proapoptotic signaling in ER-positive breast cancer cells.
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Affiliation(s)
- Stefan Broselid
- Department of Experimental Medical Science, Lund University, Lund, Sweden
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Akt2 expression is associated with good long-term prognosis in oestrogen receptor positive breast cancer. Eur J Cancer 2013; 49:1196-204. [PMID: 23305873 DOI: 10.1016/j.ejca.2012.12.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2012] [Revised: 12/06/2012] [Accepted: 12/08/2012] [Indexed: 11/22/2022]
Abstract
INTRODUCTION Akt is a signalling modulator for many cellular processes, including metabolism, cell proliferation, cell survival and cell growth. Three isoforms of Akt have been identified, but only a few studies have concerned the isoform-specific roles in the prognosis of breast cancer patients. The aim of this study was to investigate the prognostic value of v-akt murine thymoma viral oncogene homologue 1 (Akt1) and v-akt murine thymoma viral oncogene homologue 2 (Akt2) in oestrogen receptor positive (ER+) and oestrogen receptor negative (ER-) breast cancer with long-term follow-up. MATERIAL AND METHODS The expression of Akt in tumour tissue was analysed with immunohistochemistry in a cohort of 272 postmenopausal patients with stage II breast cancer. The median follow-up time was 19 years. Hazard ratios (HRs) and 95% confidence intervals (CIs) were estimated using the Cox's proportional hazards model. RESULTS The risk of distant recurrence was reduced for patients with ER+ tumours expressing Akt2 compared to patients with no Akt2 expression (HR=0.49, 95% CI 0.29-0.82, p=0.007). When adjusting for important clinical tumour characteristics and treatment, Akt2 was still an independent prognostic factor (HR=0.38, 95% CI 0.21-0.68, p=0.001) and the association remained long-term. The prognostic value of Akt2 increased with higher oestrogen receptor levels from no effect among patients with ER- tumours to 68% risk reduction for the group with high ER-levels (P for trend=0.042). Akt1 showed no significant prognostic information. CONCLUSION Our results indicate that Akt2 expression is associated with a lower distant recurrence rate for patients with ER+ tumours and that this association remains long-term. The prognostic value of Akt2 increases with higher oestrogen receptor expression, motivating further mechanistic studies on the role of Akt2 in ER+ breast cancer.
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