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Mito JK, Agoston AT, Dal Cin P, Srivastava A. Prevalence and significance of HMGA2 expression in oesophageal adenocarcinoma. Histopathology 2017; 71:909-917. [PMID: 28710822 DOI: 10.1111/his.13310] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Accepted: 07/12/2017] [Indexed: 12/20/2022]
Abstract
AIMS Oesophageal adenocarcinoma (EAC) tumorigenesis has been linked primarily to loss-of-function mutations in tumour suppressor genes. Knowledge of specific oncogenes that drive tumour progression, and their relationship to outcomes, is limited. High mobility group AT-hook 2 (HMGA2) has been reported to be amplified in a subset of EACs, but the clinicopathological and prognostic implications of HMGA2 expression in EAC are unknown. METHODS AND RESULTS We performed HMGA2 immunohistochemistry and fluorescence in-situ hybridization (FISH) in EAC to determine its clinicopathological and prognostic significance. Ninety-one primary EAC resections without neoadjuvant treatment were identified and immunohistochemistry for HMGA2 was performed. The presence or absence of nuclear staining was evaluated and correlated with predetermined clinicopathological parameters and patient outcomes. A selected subset of tumours was subjected to FISH to identify alterations at the HMGA2 locus. HMGA2 expression was present in 25 of 91 (27.4%) tumours. HMGA2-expressing cells were present in solid, poorly differentiated areas of the tumours at the invasive front, or as single infiltrating cells. FISH showed that three to four copies of HMGA2 are frequently present in EAC irrespective of HMGA2 protein expression and that high level HMGA2 amplification is a rare event. HMGA2 expression was associated with numerous adverse clinicopathological parameters, including higher T- and N-stage, the presence of lymphovascular invasion and with a worse recurrence-free and overall survival. CONCLUSION Our data suggest that HMGA2 is regulated in EAC primarily through non-chromosomal-level alterations that lead to increased HMGA2 expression. HMGA2-positive EAC correlates with adverse pathological features and worse patient outcomes.
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Affiliation(s)
- Jeffrey K Mito
- Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Agoston T Agoston
- Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Paola Dal Cin
- Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Amitabh Srivastava
- Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
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52
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Cheng Y, Yang H, Sun Y, Zhang H, Yu S, Lu Z, Chen J. RUNX1 promote invasiveness in pancreatic ductal adenocarcinoma through regulating miR-93. Oncotarget 2017; 8:99567-99579. [PMID: 29245924 PMCID: PMC5725115 DOI: 10.18632/oncotarget.20433] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Accepted: 07/26/2017] [Indexed: 01/05/2023] Open
Abstract
Runt-related transcription factor 1(RUNX1), a key factor in hematopoiesis that mediates specification and homeostasis of hematopoietic stem and progenitor cells (HSPCs), is also overexpressed in several solid human cancers, and correlated with tumor progression. However, the expression and function of RUNX1 in pancreatic ductal adenocarcinoma were still unclear. Here, we show that RUNX1 is highly expressed in pancreatic adenocarcinoma tissues and knocking down of RUNX1 attenuated aggressiveness in pancreatic cell lines. Moreover, we found that RUNX1 could negatively regulate the expression of miR-93. Bioinformatics method showed that there are two binding sites in the the promotor region of miR-93 precursor and through ChIP-qPCR and firefly luciferase reporter assay, we vertified that these two binding sites each have transcriptive activity in one pancreatic cell lines. This result supported our presumption that RUNX1 regulate miR-93 through binding to the promotor region of miR-93. Besides, the expression and function of miR-93 is quite the opposite, miR-93 overexpression suppresses migration and invasiveness in pancreatic cell lines supporting that RUNX1 negatively regulated miR-93. Our findings provided evidence regarding the role of RUNX1 as an oncogene through the inhibition of miR-93. Targeting RUNX1 can be a potential therapeutic strategy in pancreatic cancer.
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Affiliation(s)
- Yin Cheng
- Department of Pathology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Haiyan Yang
- Department of Pathology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Yang Sun
- Department of Pathology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Hongkai Zhang
- Department of Pathology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Shuangni Yu
- Department of Pathology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Zhaohui Lu
- Department of Pathology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Jie Chen
- Department of Pathology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
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53
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Gao X, Dai M, Li Q, Wang Z, Lu Y, Song Z. HMGA2 regulates lung cancer proliferation and metastasis. Thorac Cancer 2017; 8:501-510. [PMID: 28752530 PMCID: PMC5582513 DOI: 10.1111/1759-7714.12476] [Citation(s) in RCA: 77] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Revised: 06/13/2017] [Accepted: 06/13/2017] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND This study aimed to explore the effects of HMGA2 on cell proliferation and metastases in lung cancer and its underlying mechanism. METHODS HMGA2 expression in lung cancer tissues and its association with overall survival were analyzed based on data from a public database. The roles of HMGA2 were validated via loss-of-function and gain-of-function experiments in vitro. HMGA2 regulation by microRNA-195 (miR-195) was validated by real time-PCR, Western blotting, and luciferase reporter assays. RESULTS HMGA2 was upregulated and associated with reduced overall survival in patients with lung adenocarcinoma. HMGA2 knockdown suppressed the proliferation and motility of H1299 cells, while HMGA2 ectopic expression in A549 cells increased cell proliferation and migration. HMGA2 affected cell apoptosis through caspase 3/9 and Bcl-2, and regulated epithelial-to-mesenchymal transition by targeting Twist 1. Moreover, miR-195 was found to directly target the 3' untranslated region of HMGA2 messenger RNA and suppress its expression in lung cancer. CONCLUSION This study demonstrated that HMGA2, regulated by miR-195, played important roles in proliferation, metastases, and epithelial-to-mesenchymal transition in lung cancer. HMGA2 might serve as a biomarker and potential therapeutic target for lung cancer treatment.
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Affiliation(s)
- Xiaotian Gao
- Department of Cardiothoracic Surgery, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China.,Department of Cardiac Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Ming Dai
- Department of Cardiothoracic Surgery, Central People's Hospital of Zhanjiang, Zhanjiang, China
| | - Qinglan Li
- Department of Respiratory Medicine, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Zhigang Wang
- Department of Cardiothoracic Surgery, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Yonglin Lu
- Department of Respiratory Medicine, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Zeqing Song
- Department of Respiratory Medicine, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
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54
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Volk DE, Lokesh GLR. Development of Phosphorothioate DNA and DNA Thioaptamers. Biomedicines 2017; 5:E41. [PMID: 28703779 PMCID: PMC5618299 DOI: 10.3390/biomedicines5030041] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Revised: 07/03/2017] [Accepted: 07/11/2017] [Indexed: 02/07/2023] Open
Abstract
Nucleic acid aptamers are short RNA- or DNA-based affinity reagents typically selected from combinatorial libraries to bind to a specific target such as a protein, a small molecule, whole cells or even animals. Aptamers have utility in the development of diagnostic, imaging and therapeutic applications due to their size, physico-chemical nature and ease of synthesis and modification to suit the application. A variety of oligonucleotide modifications have been used to enhance the stability of aptamers from nuclease degradation in vivo. The non-bridging oxygen atoms of the phosphodiester backbones of RNA and DNA aptamers can be substituted with one or two sulfur atoms, resulting in thioaptamers with phosphorothioate or phosphorodithioate linkages, respectively. Such thioaptamers are known to have increased binding affinity towards their target, as well as enhanced resistance to nuclease degradation. In this review, we discuss the development of phosphorothioate chemistry and thioaptamers, with a brief review of selection methods.
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Affiliation(s)
- David E Volk
- McGovern Medical School, Brown Foundation Institute of Molecular Medicine for the Prevention of Human Diseases, University of Texas Health Science Center, Houston, TX 77030, USA.
| | - Ganesh L R Lokesh
- McGovern Medical School, Brown Foundation Institute of Molecular Medicine for the Prevention of Human Diseases, University of Texas Health Science Center, Houston, TX 77030, USA.
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55
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miR-509-5p and miR-1243 increase the sensitivity to gemcitabine by inhibiting epithelial-mesenchymal transition in pancreatic cancer. Sci Rep 2017. [PMID: 28638102 PMCID: PMC5479822 DOI: 10.1038/s41598-017-04191-w] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The epithelial-mesenchymal transition (EMT) contributes to various processes in cancer progression, such as metastasis and drug resistance. Since we have already established a cell-based reporter system for identifying EMT-suppressive microRNAs (miRNAs) in the pancreatic cancer cell line Panc1, we performed a function-based screening assay by combining this reporter system and a miRNA library composed of 1,090 miRNAs. As a result, we identified miR-509-5p and miR-1243 as EMT-suppressive miRNAs, although the mechanisms for EMT-suppression induced by these miRNAs have yet to be clarified. Herein, we demonstrated that overexpression of miR-509-5p and miR-1243 increased the expression of E-cadherin through the suppression of EMT-related gene expression and that drug sensitivity increased with a combination of each of these miRNAs and gemcitabine. Moreover, miR-509-5p was associated with worse overall survival in patients with pancreatic cancer and was identified as an independently selected predictor of mortality. Our findings suggest that miR-509-5p and miR-1243 might be novel chemotherapeutic targets and serve as biomarkers in pancreatic cancer.
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56
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Strell C, Norberg KJ, Mezheyeuski A, Schnittert J, Kuninty PR, Moro CF, Paulsson J, Schultz NA, Calatayud D, Löhr JM, Frings O, Verbeke CS, Heuchel RL, Prakash J, Johansen JS, Östman A. Stroma-regulated HMGA2 is an independent prognostic marker in PDAC and AAC. Br J Cancer 2017; 117:65-77. [PMID: 28524160 PMCID: PMC5520204 DOI: 10.1038/bjc.2017.140] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Revised: 04/21/2017] [Accepted: 04/26/2017] [Indexed: 12/14/2022] Open
Abstract
Background: The HMGA2 protein has experimentally been linked to EMT and cancer stemness. Recent studies imply that tumour–stroma interactions regulate these features and thereby contribute to tumour aggressiveness. Methods: We analysed 253 cases of pancreatic ductal adenocarcinoma (PDAC) and 155 cases of ampullary adenocarcinoma (AAC) for HMGA2 expression by IHC. The data were correlated with stroma abundance and supplemented by experimental studies. Results: HMGA2 acts as an independent prognostic marker associated with a significantly shorter overall survival in both tumour types. Overall, HMGA2-positivity was more frequent in patients with PDAC than with AAC. The HMGA2 status in tumour cells significantly correlated with the abundance of PDGFRβ-defined stroma cells. In vivo co-injection of Panc-1 cancer cells with pancreatic stellate cells increased tumour growth in a manner associated with increased HMGA2 expression. Furthermore, in vitro treatment of Panc-1 with conditioned media from PDGF-BB-activated stellate cells increased their ability to form tumour spheroids. Conclusions: This study identifies HMGA2 expression in tumour cells as an independent prognostic marker in PDAC and AAC. Correlative data analysis gives novel tissue-based evidence for a heterotypic cross-talk with stroma cells as a possible mechanism for HMGA2 induction, which is further supported by experimental models.
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Affiliation(s)
- Carina Strell
- Department of Oncology-Pathology, Cancer Center Karolinska (CCK), Karolinska Institutet, Stockholm 17176, Sweden
| | - Karin Jessica Norberg
- Department of Clinical Intervention and Technology (CLINTEC), Center for Digestive Diseases, Karolinska University Hospital and Division of Surgery, Karolinska Institutet, Stockholm 14186, Sweden
| | - Artur Mezheyeuski
- Department of Oncology-Pathology, Cancer Center Karolinska (CCK), Karolinska Institutet, Stockholm 17176, Sweden
| | - Jonas Schnittert
- Department of Biomaterials Science and Technology, Targeted Therapeutics, MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, Zuidhorst building, ZH254, Enschede 7500AE, The Netherlands
| | - Praneeth R Kuninty
- Department of Biomaterials Science and Technology, Targeted Therapeutics, MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, Zuidhorst building, ZH254, Enschede 7500AE, The Netherlands
| | - Carlos Fernández Moro
- Department of Laboratory Medicine (LabMed) Division of Pathology, Karolinska Institutet, Stockholm 14186, Sweden.,Department of Clinical Pathology/Cytology, Karolinska University Hospital, Stockholm 14186, Sweden
| | - Janna Paulsson
- Department of Oncology-Pathology, Cancer Center Karolinska (CCK), Karolinska Institutet, Stockholm 17176, Sweden
| | - Nicolai Aagaard Schultz
- Department of Surgical Gastroenterology and Transplantation, Rigshospitalet, Copenhagen University Hospital, Copenhagen 2100, Denmark
| | - Dan Calatayud
- Department of Surgical Gastroenterology and Transplantation, Rigshospitalet, Copenhagen University Hospital, Copenhagen 2100, Denmark
| | - Johannes Matthias Löhr
- Department of Clinical Intervention and Technology (CLINTEC), Center for Digestive Diseases, Karolinska University Hospital and Division of Surgery, Karolinska Institutet, Stockholm 14186, Sweden
| | - Oliver Frings
- Department of Oncology-Pathology, Science for Life Laboratory, Karolinska Institutet, Stockholm 17176, Sweden
| | - Caroline Sophie Verbeke
- Institute of Clinical Medicine, University of Oslo, Postbox 1171 Blindern, Oslo 0318, Norway.,Department of Pathology, Oslo University Hospital, Rikshospitalet, Postbox 4956 Nydalen, Oslo 0424, Norway
| | - Rainer Lothar Heuchel
- Department of Clinical Intervention and Technology (CLINTEC), Center for Digestive Diseases, Karolinska University Hospital and Division of Surgery, Karolinska Institutet, Stockholm 14186, Sweden
| | - Jai Prakash
- Department of Oncology-Pathology, Cancer Center Karolinska (CCK), Karolinska Institutet, Stockholm 17176, Sweden.,Department of Biomaterials Science and Technology, Targeted Therapeutics, MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, Zuidhorst building, ZH254, Enschede 7500AE, The Netherlands
| | - Julia Sidenius Johansen
- Department of Oncology and Medicine, Herlev and Gentofte Hospital, Copenhagen University Hospital, Herlev 2730, Denmark
| | - Arne Östman
- Department of Oncology-Pathology, Cancer Center Karolinska (CCK), Karolinska Institutet, Stockholm 17176, Sweden
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57
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Heery R, Finn SP, Cuffe S, Gray SG. Long Non-Coding RNAs: Key Regulators of Epithelial-Mesenchymal Transition, Tumour Drug Resistance and Cancer Stem Cells. Cancers (Basel) 2017; 9:cancers9040038. [PMID: 28430163 PMCID: PMC5406713 DOI: 10.3390/cancers9040038] [Citation(s) in RCA: 129] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Revised: 04/14/2017] [Accepted: 04/18/2017] [Indexed: 02/07/2023] Open
Abstract
Epithelial mesenchymal transition (EMT), the adoption by epithelial cells of a mesenchymal-like phenotype, is a process co-opted by carcinoma cells in order to initiate invasion and metastasis. In addition, it is becoming clear that is instrumental to both the development of drug resistance by tumour cells and in the generation and maintenance of cancer stem cells. EMT is thus a pivotal process during tumour progression and poses a major barrier to the successful treatment of cancer. Non-coding RNAs (ncRNA) often utilize epigenetic programs to regulate both gene expression and chromatin structure. One type of ncRNA, called long non-coding RNAs (lncRNAs), has become increasingly recognized as being both highly dysregulated in cancer and to play a variety of different roles in tumourigenesis. Indeed, over the last few years, lncRNAs have rapidly emerged as key regulators of EMT in cancer. In this review, we discuss the lncRNAs that have been associated with the EMT process in cancer and the variety of molecular mechanisms and signalling pathways through which they regulate EMT, and finally discuss how these EMT-regulating lncRNAs impact on both anti-cancer drug resistance and the cancer stem cell phenotype.
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Affiliation(s)
- Richard Heery
- Thoracic Oncology Research Group, Rm 2.09, Trinity Translational Medical Institute, St. James's Hospital, Dublin D08 W9RT, Ireland.
- Masters in Translational Oncology Program, Department of Surgery, Trinity College Dublin, Trinity Translational Medical Institute, St. James's Hospital, Dublin D08 W9RT, Ireland.
| | - Stephen P Finn
- Department of Histopathology & Morbid Anatomy, Trinity College Dublin, Dublin D08 RX0X, Ireland.
| | - Sinead Cuffe
- HOPE Directorate, St. James's Hospital, Dublin D08 RT2X, Ireland.
| | - Steven G Gray
- Thoracic Oncology Research Group, Rm 2.09, Trinity Translational Medical Institute, St. James's Hospital, Dublin D08 W9RT, Ireland.
- HOPE Directorate, St. James's Hospital, Dublin D08 RT2X, Ireland.
- Department of Clinical Medicine, School of Medicine, Trinity College Dublin, Dublin D02 R590, Ireland.
- Labmed Directorate, St. James's Hospital, Dublin D08 K0Y5, Ireland.
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58
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Träger MM, Dhayat SA. Epigenetics of epithelial-to-mesenchymal transition in pancreatic carcinoma. Int J Cancer 2017; 141:24-32. [DOI: 10.1002/ijc.30626] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Revised: 01/09/2017] [Accepted: 01/25/2017] [Indexed: 12/14/2022]
Affiliation(s)
- Max M. Träger
- Department of General and Visceral Surgery; University Hospital of Muenster; Muenster Germany
| | - Sameer A. Dhayat
- Department of General and Visceral Surgery; University Hospital of Muenster; Muenster Germany
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59
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Sun J, Sun B, Zhu D, Zhao X, Zhang Y, Dong X, Che N, Li J, Liu F, Zhao N, Zhang D, Liu T, Lin X. HMGA2 regulates CD44 expression to promote gastric cancer cell motility and sphere formation. Am J Cancer Res 2017; 7:260-274. [PMID: 28337375 PMCID: PMC5336500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Accepted: 10/28/2016] [Indexed: 06/06/2023] Open
Abstract
High mobility group AT-hook 2 (HMGA2) is a transcriptional modulator that mediates motility and self-renewal in cancer stem cells. Gastric cancer (GC) is the third leading cause of cancer-related deaths worldwide. GC contains a population of stem-like cells that promote tumor invasion and resistance to therapy. In the current study, we investigated the expression of HMGA2 and the cancer stem cell marker CD44 in 200 GC samples and found that HMGA2 and CD44 were significantly associated with distant metastasis, histological differentiation and poor prognosis in GC patients. Positive clinical correlations of HMGA2 with CD44 were also observed in tissue sections. In vitro, overexpression of HMGA2 promoted GC sphere formation and migration in MKN74/MKN28 cells, whereas downregulation of HMGA2 decreased GC sphere formation and migration in MKN45/MGC803 cells. In addition, western blot and immunofluorescent analyses showed that HMGA2 increased the expression of the stem cell markers CD44, ALDH1, Sox2, and Oct4 and the EMT-related factors Snail and β-catenin. In a xenograft mouse model, overexpression of HMGA2 promoted tumor growth. Further immunohistochemical (IHC) analysis showed that HMGA2 increased the expression of CD44 and β-catenin, resulting in the promotion of tumor growth. Taken together, our findings indicate that HMGA2 promotes GC cancer stem cell induction and cell motility by regulating the expression of CD44. Therefore, targeting HMGA2 in GC may be therapeutically beneficial.
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Affiliation(s)
- Junying Sun
- Department of Pathology, Tianjin Medical UniversityTianjin 300070, China
| | - Baocun Sun
- Department of Pathology, Tianjin Medical UniversityTianjin 300070, China
- Department of Pathology, Tianjin General Hospital, Tianjin Medical UniversityTianjin 300052, China
- Department of Pathology, Tianjin Cancer Hospital, Tianjin Medical UniversityTianjin 300060, China
| | - Dongwang Zhu
- Department of Prosthodontics, Affiliated Stomatological Hospital, Tianjin Medical UniversityTianjin 300070, China
| | - Xiulan Zhao
- Department of Pathology, Tianjin Medical UniversityTianjin 300070, China
- Department of Pathology, Tianjin General Hospital, Tianjin Medical UniversityTianjin 300052, China
| | - Yanhui Zhang
- Department of Pathology, Tianjin Cancer Hospital, Tianjin Medical UniversityTianjin 300060, China
| | - Xueyi Dong
- Department of Pathology, Tianjin Medical UniversityTianjin 300070, China
| | - Na Che
- Department of Pathology, Tianjin Medical UniversityTianjin 300070, China
- Department of Pathology, Tianjin General Hospital, Tianjin Medical UniversityTianjin 300052, China
| | - Jing Li
- Department of Pathology, Tianjin Medical UniversityTianjin 300070, China
- Department of Pathology, Tianjin General Hospital, Tianjin Medical UniversityTianjin 300052, China
| | - Fang Liu
- Department of Pathology, Tianjin Medical UniversityTianjin 300070, China
| | - Nan Zhao
- Department of Pathology, Tianjin Medical UniversityTianjin 300070, China
- Department of Pathology, Tianjin General Hospital, Tianjin Medical UniversityTianjin 300052, China
| | - Danfang Zhang
- Department of Pathology, Tianjin Medical UniversityTianjin 300070, China
- Department of Pathology, Tianjin General Hospital, Tianjin Medical UniversityTianjin 300052, China
| | - Tieju Liu
- Department of Pathology, Tianjin Medical UniversityTianjin 300070, China
- Department of Pathology, Tianjin General Hospital, Tianjin Medical UniversityTianjin 300052, China
| | - Xian Lin
- Department of Pathology, Tianjin Medical UniversityTianjin 300070, China
- Department of Pathology, Tianjin General Hospital, Tianjin Medical UniversityTianjin 300052, China
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Stacy AJ, Craig MP, Sakaram S, Kadakia M. ΔNp63α and microRNAs: leveraging the epithelial-mesenchymal transition. Oncotarget 2017; 8:2114-2129. [PMID: 27924063 PMCID: PMC5356785 DOI: 10.18632/oncotarget.13797] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Accepted: 11/22/2016] [Indexed: 12/16/2022] Open
Abstract
The epithelial-mesenchymal transition (EMT) is a cellular reprogramming mechanism that is an underlying cause of cancer metastasis. Recent investigations have uncovered an intricate network of regulation involving the TGFβ, Wnt, and Notch signaling pathways and small regulatory RNA species called microRNAs (miRNAs). The activity of a transcription factor vital to the maintenance of epithelial stemness, ΔNp63α, has been shown to modulate the activity of these EMT pathways to either repress or promote EMT. Furthermore, ΔNp63α is a known regulator of miRNA, including those directly involved in EMT. This review discusses the evidence of ΔNp63α as a master regulator of EMT components and miRNA, highlighting the need for a deeper understanding of its role in EMT. This expanded knowledge may provide a basis for new developments in the diagnosis and treatment of metastatic cancer.
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Affiliation(s)
- Andrew J. Stacy
- Department of Biochemistry and Molecular Biology, Wright State University, Dayton, OH, USA
| | - Michael P. Craig
- Department of Biochemistry and Molecular Biology, Wright State University, Dayton, OH, USA
| | - Suraj Sakaram
- Department of Biochemistry and Molecular Biology, Wright State University, Dayton, OH, USA
| | - Madhavi Kadakia
- Department of Biochemistry and Molecular Biology, Wright State University, Dayton, OH, USA
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Kaur H, Ali SZ, Huey L, Hütt-Cabezas M, Taylor I, Mao XG, Weingart M, Chu Q, Rodriguez FJ, Eberhart CG, Raabe EH. The transcriptional modulator HMGA2 promotes stemness and tumorigenicity in glioblastoma. Cancer Lett 2016; 377:55-64. [PMID: 27102002 DOI: 10.1016/j.canlet.2016.04.020] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Revised: 04/08/2016] [Accepted: 04/11/2016] [Indexed: 01/17/2023]
Abstract
Glioblastoma (GBM) contains a population of stem-like cells that promote tumor invasion and resistance to therapy. Identifying and targeting stem cell factors in GBM may lead to the development of more effective therapies. High Mobility Group AT-hook 2 (HMGA2) is a transcriptional modulator that mediates motility and self-renewal in normal and cancer stem cells. We identified increased expression of HMGA2 in the majority of primary human GBM tumors and cell lines compared to normal brain. Additionally, HMGA2 expression was increased in CD133+ GBM neurosphere cells compared to CD133- cells. Targeting HMGA2 with lentiviral short hairpin RNA (shRNA) led to decreased GBM stemness, invasion, and tumorigenicity. Ectopic expression of HMGA2 in GBM cell lines promoted stemness, invasion, and tumorigenicity. Our data suggests that targeting HMGA2 in GBM may be therapeutically beneficial.
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Affiliation(s)
- Harpreet Kaur
- Division of Neuropathology and Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, MD 21287, USA; Division of Pediatric Oncology, Johns Hopkins University, Bloomberg Children's Hospital, Room 11379, 1800 Orleans St, Baltimore, MD 21287, USA
| | - Sabeen Zulfiqar Ali
- Division of Neuropathology and Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, MD 21287, USA
| | - Lauren Huey
- Division of Neuropathology and Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, MD 21287, USA
| | - Marianne Hütt-Cabezas
- Division of Neuropathology and Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, MD 21287, USA; Division of Pediatric Oncology, Johns Hopkins University, Bloomberg Children's Hospital, Room 11379, 1800 Orleans St, Baltimore, MD 21287, USA
| | - Isabella Taylor
- Division of Pediatric Oncology, Johns Hopkins University, Bloomberg Children's Hospital, Room 11379, 1800 Orleans St, Baltimore, MD 21287, USA
| | - Xing-Gang Mao
- Division of Neuropathology and Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, MD 21287, USA
| | - Melanie Weingart
- Division of Neuropathology and Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, MD 21287, USA
| | - Qian Chu
- Division of Neuropathology and Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, MD 21287, USA
| | - Fausto J Rodriguez
- Division of Neuropathology and Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, MD 21287, USA
| | - Charles G Eberhart
- Division of Neuropathology and Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, MD 21287, USA
| | - Eric H Raabe
- Division of Neuropathology and Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, MD 21287, USA; Division of Pediatric Oncology, Johns Hopkins University, Bloomberg Children's Hospital, Room 11379, 1800 Orleans St, Baltimore, MD 21287, USA.
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Taucher V, Mangge H, Haybaeck J. Non-coding RNAs in pancreatic cancer: challenges and opportunities for clinical application. Cell Oncol (Dordr) 2016; 39:295-318. [DOI: 10.1007/s13402-016-0275-7] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/17/2016] [Indexed: 01/17/2023] Open
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Xi Y, Shen W, Ma L, Zhao M, Zheng J, Bu S, Hino S, Nakao M. HMGA2 promotes adipogenesis by activating C/EBPβ-mediated expression of PPARγ. Biochem Biophys Res Commun 2016; 472:617-23. [PMID: 26966068 DOI: 10.1016/j.bbrc.2016.03.015] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Accepted: 03/06/2016] [Indexed: 12/11/2022]
Abstract
Adipogenesis is orchestrated by a highly ordered network of transcription factors including peroxisome-proliferator activated receptor-gamma (PPARγ) and CCAAT-enhancer binding protein (C/EBP) family proteins. High mobility group protein AT-hook 2 (HMGA2), an architectural transcription factor, has been reported to play an essential role in preadipocyte proliferation, and its overexpression has been implicated in obesity in mice and humans. However, the direct role of HMGA2 in regulating the gene expression program during adipogenesis is not known. Here, we demonstrate that HMGA2 is required for C/EBPβ-mediated expression of PPARγ, and thus promotes adipogenic differentiation. We observed a transient but marked increase of Hmga2 transcript at an early phase of differentiation of mouse 3T3-L1 preadipocytes. Importantly, Hmga2 knockdown greatly impaired adipocyte formation, while its overexpression promoted the formation of mature adipocytes. We found that HMGA2 colocalized with C/EBPβ in the nucleus and was required for the recruitment of C/EBPβ to its binding element at the Pparγ2 promoter. Accordingly, HMGA2 and C/EBPβ cooperatively enhanced the Pparγ2 promoter activity. Our results indicate that HMGA2 is an essential constituent of the adipogenic transcription factor network, and thus its function may be affected during the course of obesity.
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Affiliation(s)
- Yang Xi
- Diabetes Center, and Zhejiang Provincial Key Laboratory of Pathophysiology, Institute of Biochemistry and Molecular Biology, School of Medicine, Ningbo University, Ningbo 315211, China
| | - Wanjing Shen
- Diabetes Center, and Zhejiang Provincial Key Laboratory of Pathophysiology, Institute of Biochemistry and Molecular Biology, School of Medicine, Ningbo University, Ningbo 315211, China
| | - Lili Ma
- Diabetes Center, and Zhejiang Provincial Key Laboratory of Pathophysiology, Institute of Biochemistry and Molecular Biology, School of Medicine, Ningbo University, Ningbo 315211, China
| | - Ming Zhao
- Diabetes Center, and Zhejiang Provincial Key Laboratory of Pathophysiology, Institute of Biochemistry and Molecular Biology, School of Medicine, Ningbo University, Ningbo 315211, China
| | - Jiachen Zheng
- Diabetes Center, and Zhejiang Provincial Key Laboratory of Pathophysiology, Institute of Biochemistry and Molecular Biology, School of Medicine, Ningbo University, Ningbo 315211, China
| | - Shizhong Bu
- Diabetes Center, and Zhejiang Provincial Key Laboratory of Pathophysiology, Institute of Biochemistry and Molecular Biology, School of Medicine, Ningbo University, Ningbo 315211, China.
| | - Shinjiro Hino
- Department of Medical Cell Biology, Institute of Molecular Embryology and Genetics, Kumamoto University, Kumamoto, 860-0811, Japan
| | - Mitsuyoshi Nakao
- Department of Medical Cell Biology, Institute of Molecular Embryology and Genetics, Kumamoto University, Kumamoto, 860-0811, Japan; Core Research for Evolutional Science and Technology (CREST), Japan Agency for Medical Research and Development, Tokyo, Japan.
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64
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Kao CY, Yang PM, Wu MH, Huang CC, Lee YC, Lee KH. Heat shock protein 90 is involved in the regulation of HMGA2-driven growth and epithelial-to-mesenchymal transition of colorectal cancer cells. PeerJ 2016; 4:e1683. [PMID: 26893968 PMCID: PMC4756735 DOI: 10.7717/peerj.1683] [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: 10/15/2015] [Accepted: 01/21/2016] [Indexed: 01/05/2023] Open
Abstract
High Mobility Group AT-hook 2 (HMGA2) is a nonhistone chromatin-binding protein which acts as a transcriptional regulating factor involved in gene transcription. In particular, overexpression of HMGA2 has been demonstrated to associate with neoplastic transformation and tumor progression in Colorectal Cancer (CRC). Thus, HMGA2 is a potential therapeutic target in cancer therapy. Heat Shock Protein 90 (Hsp90) is a chaperone protein required for the stability and function for a number of proteins that promote the growth, mobility, and survival of cancer cells. Moreover, it has shown strong positive connections were observed between Hsp90 inhibitors and CRC, which indicated their potential for use in CRC treatment by using combination of data mining and experimental designs. However, little is known about the effect of Hsp90 inhibition on HMGA2 protein expression in CRC. In this study, we tested the hypothesis that Hsp90 may regulate HMGA2 expression and investigated the relationship between Hsp90 and HMGA2 signaling. The use of the second-generation Hsp90 inhibitor, NVP-AUY922, considerably knocked down HMGA2 expression, and the effects of Hsp90 and HMGA2 knockdown were similar. In addition, Hsp90 knockdown abrogates colocalization of Hsp90 and HMGA2 in CRC cells. Moreover, the suppression of HMGA2 protein expression in response to NVP-AUY922 treatment resulted in ubiquitination and subsequent proteasome-dependant degradation of HMGA2. Furthermore, RNAi-mediated silencing of HMGA2 reduced the survival of CRC cells and increased the sensitivity of these cells to chemotherapy. Finally, we found that the NVP-AUY922-dependent mitigation of HMGA2 signaling occurred also through indirect reactivation of the tumor suppressor microRNA (miRNA), let-7a, or the inhibition of ERK-regulated HMGA2 involved in regulating the growth of CRC cells. Collectively, our studies identify the crucial role for the Hsp90-HMGA2 interaction in maintaining CRC cell survival and migration. These findings have significant implications for inhibition HMGA2-dependent tumorigenesis by clinically available Hsp90 inhibitors.
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Affiliation(s)
- Chun-Yu Kao
- Department of Pediatric Surgery, Taipei Medical University-Shuang Ho Hospital, New Taipei City, Taiwan
| | - Pei-Ming Yang
- Graduate Institute of Cancer Biology and Drug Discovery, College of Medical Science and Technology, Taipei Medical University, Taipei, Taiwan
| | - Ming-Heng Wu
- Graduate Institute of Translational Medicine, College of Medical Science and Technology, Taipei Medical University, Taipei, Taiwan
| | - Chi-Chen Huang
- Graduate Institute of Neural Regenerative Medicine, College of Medical Science and Technology, Taipei Medical University, Taipei, Taiwan
| | - Yi-Chao Lee
- Graduate Institute of Neural Regenerative Medicine, College of Medical Science and Technology, Taipei Medical University, Taipei, Taiwan
| | - Kuen-Haur Lee
- Graduate Institute of Cancer Biology and Drug Discovery, College of Medical Science and Technology, Taipei Medical University, Taipei, Taiwan
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65
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Matouk IJ, Halle D, Raveh E, Gilon M, Sorin V, Hochberg A. The role of the oncofetal H19 lncRNA in tumor metastasis: orchestrating the EMT-MET decision. Oncotarget 2016; 7:3748-65. [PMID: 26623562 PMCID: PMC4826167 DOI: 10.18632/oncotarget.6387] [Citation(s) in RCA: 102] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Accepted: 11/15/2015] [Indexed: 12/14/2022] Open
Abstract
Long non-coding RNA (lncRNA) genes are emerging as key players in the metastatic cascade. Current evidence indicate that H19 lncRNA and the microRNA(miRNA) miR-675, which is processed from it, play crucial roles in metastasis, through the regulation of critical events specifically the epithelial to mesenchymal (EMT) and the mesenchymal to epithelial transitions (MET). This review summarizes recent mechanistic pathways and tries to put together seemingly conflicting data from different reports under one proposed general scheme underlying the various roles of H19/miR-675 in the metastatic cascade. We propose several approaches to harnessing this knowledge for translational medicine.
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Affiliation(s)
- Imad J. Matouk
- Department of Biological Chemistry, Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem, Israel
- Department of Biological Sciences, Faculty of Science and Technology, Al-Quds University, Jerusalem, West Bank
| | - David Halle
- Department of Biological Chemistry, Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Eli Raveh
- Department of Biological Chemistry, Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Michal Gilon
- Department of Biological Chemistry, Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Vladimir Sorin
- Department of Biological Chemistry, Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Avraham Hochberg
- Department of Biological Chemistry, Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem, Israel
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66
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Macrì S, Simula L, Pellarin I, Pegoraro S, Onorati M, Sgarra R, Manfioletti G, Vignali R. Hmga2 is required for neural crest cell specification in Xenopus laevis. Dev Biol 2016; 411:25-37. [PMID: 26806704 DOI: 10.1016/j.ydbio.2016.01.014] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Revised: 12/23/2015] [Accepted: 01/20/2016] [Indexed: 12/12/2022]
Abstract
HMGA proteins are small nuclear proteins that bind DNA by conserved AT-hook motifs, modify chromatin architecture and assist in gene expression. Two HMGAs (HMGA1 and HMGA2), encoded by distinct genes, exist in mammals and are highly expressed during embryogenesis or reactivated in tumour progression. We here addressed the in vivo role of Xenopus hmga2 in the neural crest cells (NCCs). We show that hmga2 is required for normal NCC specification and development. hmga2 knockdown leads to severe disruption of major skeletal derivatives of anterior NCCs. We show that, within the NCC genetic network, hmga2 acts downstream of msx1, and is required for msx1, pax3 and snail2 activities, thus participating at different levels of the network. Because of hmga2 early effects in NCC specification, the subsequent epithelial-mesenchymal transition (EMT) and migration of NCCs towards the branchial pouches are also compromised. Strictly paralleling results on embryos, interfering with Hmga2 in a breast cancer cell model for EMT leads to molecular effects largely consistent with those observed on NCCs. These data indicate that Hmga2 is recruited in key molecular events that are shared by both NCCs and tumour cells.
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Affiliation(s)
- Simone Macrì
- Dipartimento di Biologia, Unità di Biologia Cellulare e dello Sviluppo, Università degli Studi di Pisa, SS12 Abetone e Brennero 4, 56127 Pisa, Italy
| | - Luca Simula
- Dipartimento di Biologia, Unità di Biologia Cellulare e dello Sviluppo, Università degli Studi di Pisa, SS12 Abetone e Brennero 4, 56127 Pisa, Italy
| | - Ilenia Pellarin
- Dipartimento di Scienze della Vita, Università degli Studi di Trieste, via Giorgieri 5, 34127 Trieste, Italy
| | - Silvia Pegoraro
- Dipartimento di Scienze della Vita, Università degli Studi di Trieste, via Giorgieri 5, 34127 Trieste, Italy
| | - Marco Onorati
- Dipartimento di Biologia, Unità di Biologia Cellulare e dello Sviluppo, Università degli Studi di Pisa, SS12 Abetone e Brennero 4, 56127 Pisa, Italy
| | - Riccardo Sgarra
- Dipartimento di Scienze della Vita, Università degli Studi di Trieste, via Giorgieri 5, 34127 Trieste, Italy
| | - Guidalberto Manfioletti
- Dipartimento di Scienze della Vita, Università degli Studi di Trieste, via Giorgieri 5, 34127 Trieste, Italy
| | - Robert Vignali
- Dipartimento di Biologia, Unità di Biologia Cellulare e dello Sviluppo, Università degli Studi di Pisa, SS12 Abetone e Brennero 4, 56127 Pisa, Italy.
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67
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Kaller M, Hermeking H. Interplay Between Transcription Factors and MicroRNAs Regulating Epithelial-Mesenchymal Transitions in Colorectal Cancer. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2016; 937:71-92. [DOI: 10.1007/978-3-319-42059-2_4] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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HDAC inhibition impedes epithelial-mesenchymal plasticity and suppresses metastatic, castration-resistant prostate cancer. Oncogene 2015; 35:3781-95. [PMID: 26640144 PMCID: PMC4896852 DOI: 10.1038/onc.2015.444] [Citation(s) in RCA: 100] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Revised: 08/28/2015] [Accepted: 10/05/2015] [Indexed: 02/07/2023]
Abstract
PI3K/AKT and RAS/MAPK pathway co-activation in the prostate epithelium promotes both epithelial-mesenchymal transition (EMT) and metastatic castration-resistant prostate cancer (mCRPC), which is currently incurable. To study the dynamic regulation of the EMT process, we developed novel genetically-defined cellular and in vivo model systems from which epithelial, EMT, and mesenchymal-like tumor cells with Pten deletion and Kras activation can be isolated. When cultured individually, each population has the capacity to regenerate all three tumor cell populations, indicative of epithelial-mesenchymal plasticity. Despite harboring the same genetic alterations, mesenchymal-like tumor cells are resistant to PI3K and MAPK pathway inhibitors, suggesting that epigenetic mechanisms may regulate the EMT process, as well as dictate the heterogeneous responses of cancer cells to therapy. Among differentially expressed epigenetic regulators, the chromatin remodeling protein HMGA2 is significantly upregulated in EMT and mesenchymal-like tumors cells, as well as in human mCRPC. Knockdown of HMGA2, or suppressing HMGA2 expression with the histone deacetylase (HDAC) inhibitor LBH589, inhibits epithelial-mesenchymal plasticity and stemness activities in vitro and dramatically reduces tumor growth and metastasis in vivo through successful targeting of EMT and mesenchymal-like tumor cells. Importantly, LBH589 treatment in combination with castration prevents mCRPC development and significantly prolongs survival following castration by enhancing p53 and AR acetylation and in turn sensitizing castration-resistant mesenchymal-like tumor cells to ADT. Taken together, these findings demonstrate that cellular plasticity is regulated epigenetically, and that mesenchymal-like tumor cell populations in mCRPC that are resistant to conventional and targeted therapies can be effectively treated with the epigenetic inhibitor LBH589.
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69
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MiRNAs and Other Epigenetic Changes as Biomarkers in Triple Negative Breast Cancer. Int J Mol Sci 2015; 16:28347-76. [PMID: 26633365 PMCID: PMC4691037 DOI: 10.3390/ijms161226090] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Revised: 10/30/2015] [Accepted: 11/12/2015] [Indexed: 02/06/2023] Open
Abstract
Triple negative breast cancer (TNBC) is characterised by the lack of receptors for estrogen (ER), progesterone (PR), and human epidermal growth factor 2 (HER2). Since it cannot be treated by current endocrine therapies which target these receptors and due to its aggressive nature, it has one of the worst prognoses of all breast cancer subtypes. The only treatments remain chemo- and/or radio-therapy and surgery and because of this, novel biomarkers or treatment targets are urgently required to improve disease outcomes. MicroRNAs represent an attractive candidate for targeted therapies against TNBC, due to their natural ability to act as antisense interactors and regulators of entire gene sets involved in malignancy and their superiority over mRNA profiling to accurately classify disease. Here we review the current knowledge regarding miRNAs as biomarkers in TNBC and their potential use as therapeutic targets in this disease. Further, we review other epigenetic changes and interactions of these changes with microRNAs in this breast cancer subtype, which may lead to the discovery of new treatment targets for TNBC.
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70
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Roy N, Malik S, Villanueva KE, Urano A, Lu X, Von Figura G, Seeley ES, Dawson DW, Collisson EA, Hebrok M. Brg1 promotes both tumor-suppressive and oncogenic activities at distinct stages of pancreatic cancer formation. Genes Dev 2015; 29:658-71. [PMID: 25792600 PMCID: PMC4378197 DOI: 10.1101/gad.256628.114] [Citation(s) in RCA: 119] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Pancreatic Ductal Adenocarcinoma (PDA) develops predominantly through pancreatic intraepithelial neoplasia (PanIN) and intraductal papillary mucinous neoplasm (IPMN) precursor lesions. Roy et al. identify critical antagonistic roles for Brg1, a catalytic subunit of the SWI/SNF complexes, during IPMN-PDA development. In mature duct cells Brg1 inhibits the dedifferentiation that precedes neoplastic transformation. In contrast, Brg1 promotes tumorigenesis in full-blown PDA by supporting a mesenchymal-like transcriptional landscape. JQ1 impairs PDA tumorigenesis by both mimicking some and inhibiting other Brg1-mediated functions. Pancreatic ductal adenocarcinoma (PDA) develops predominantly through pancreatic intraepithelial neoplasia (PanIN) and intraductal papillary mucinous neoplasm (IPMN) precursor lesions. Pancreatic acinar cells are reprogrammed to a “ductal-like” state during PanIN-PDA formation. Here, we demonstrate a parallel mechanism operative in mature duct cells during which functional cells undergo “ductal retrogression” to form IPMN-PDA. We further identify critical antagonistic roles for Brahma-related gene 1 (Brg1), a catalytic subunit of the SWI/SNF complexes, during IPMN-PDA development. In mature duct cells, Brg1 inhibits the dedifferentiation that precedes neoplastic transformation, thus attenuating tumor initiation. In contrast, Brg1 promotes tumorigenesis in full-blown PDA by supporting a mesenchymal-like transcriptional landscape. We further show that JQ1, a drug that is currently being tested in clinical trials for hematological malignancies, impairs PDA tumorigenesis by both mimicking some and inhibiting other Brg1-mediated functions. In summary, our study demonstrates the context-dependent roles of Brg1 and points to potential therapeutic treatment options based on epigenetic regulation in PDA.
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Affiliation(s)
- Nilotpal Roy
- Diabetes Center, Department of Medicine, University of California at San Francisco, San Francisco, California 94143, USA
| | - Shivani Malik
- Department of Medicine/Hematology and Oncology, University of California at San Francisco, San Francisco, California 94143, USA
| | - Karina E Villanueva
- Diabetes Center, Department of Medicine, University of California at San Francisco, San Francisco, California 94143, USA
| | - Atsushi Urano
- Diabetes Center, Department of Medicine, University of California at San Francisco, San Francisco, California 94143, USA
| | - Xinyuan Lu
- Department of Medicine/Hematology and Oncology, University of California at San Francisco, San Francisco, California 94143, USA
| | - Guido Von Figura
- II. Medizinische Klinik und Poliklinik, Klinikum Rechts der Isar der Technischen Universität München, 81675 Munich, Germany
| | - E Scott Seeley
- Department of Pathology, University of California at San Francisco, San Francisco, California 94143, USA
| | - David W Dawson
- Department of Pathology and Laboratory Medicine, University of California at Los Angeles, Los Angeles, California 90095, USA
| | - Eric A Collisson
- Department of Medicine/Hematology and Oncology, University of California at San Francisco, San Francisco, California 94143, USA
| | - Matthias Hebrok
- Diabetes Center, Department of Medicine, University of California at San Francisco, San Francisco, California 94143, USA;
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Kourtidis A, Ngok SP, Pulimeno P, Feathers RW, Carpio LR, Baker TR, Carr JM, Yan IK, Borges S, Perez EA, Storz P, Copland JA, Patel T, Thompson EA, Citi S, Anastasiadis PZ. Distinct E-cadherin-based complexes regulate cell behaviour through miRNA processing or Src and p120 catenin activity. Nat Cell Biol 2015; 17:1145-57. [PMID: 26302406 PMCID: PMC4975377 DOI: 10.1038/ncb3227] [Citation(s) in RCA: 82] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Accepted: 07/20/2015] [Indexed: 12/11/2022]
Abstract
E-cadherin and p120 catenin (p120) are essential for epithelial homeostasis, but can also exert pro-tumorigenic activities. Here, we resolve this apparent paradox by identifying two spatially and functionally distinct junctional complexes in non-transformed polarized epithelial cells: one growth suppressing at the apical zonula adherens (ZA), defined by the p120 partner PLEKHA7 and a non-nuclear subset of the core microprocessor components DROSHA and DGCR8, and one growth promoting at basolateral areas of cell-cell contact containing tyrosine-phosphorylated p120 and active Src. Recruitment of DROSHA and DGCR8 to the ZA is PLEKHA7 dependent. The PLEKHA7-microprocessor complex co-precipitates with primary microRNAs (pri-miRNAs) and possesses pri-miRNA processing activity. PLEKHA7 regulates the levels of select miRNAs, in particular processing of miR-30b, to suppress expression of cell transforming markers promoted by the basolateral complex, including SNAI1, MYC and CCND1. Our work identifies a mechanism through which adhesion complexes regulate cellular behaviour and reveals their surprising association with the microprocessor.
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Affiliation(s)
- Antonis Kourtidis
- Department of Cancer Biology, Mayo Clinic Comprehensive Cancer Center, Mayo Clinic, 4500 San Pablo Road, Jacksonville, Florida 32224, USA
| | - Siu P. Ngok
- Department of Cancer Biology, Mayo Clinic Comprehensive Cancer Center, Mayo Clinic, 4500 San Pablo Road, Jacksonville, Florida 32224, USA
| | - Pamela Pulimeno
- Department of Molecular Biology, University of Geneva, 30 quai Ernest-Ansermet, CH-1211, Geneva 4, Switzerland
| | - Ryan W. Feathers
- Department of Cancer Biology, Mayo Clinic Comprehensive Cancer Center, Mayo Clinic, 4500 San Pablo Road, Jacksonville, Florida 32224, USA
| | - Lomeli R. Carpio
- Department of Cancer Biology, Mayo Clinic Comprehensive Cancer Center, Mayo Clinic, 4500 San Pablo Road, Jacksonville, Florida 32224, USA
| | - Tiffany R. Baker
- Department of Cancer Biology, Mayo Clinic Comprehensive Cancer Center, Mayo Clinic, 4500 San Pablo Road, Jacksonville, Florida 32224, USA
| | - Jennifer M. Carr
- Department of Cancer Biology, Mayo Clinic Comprehensive Cancer Center, Mayo Clinic, 4500 San Pablo Road, Jacksonville, Florida 32224, USA
| | - Irene K. Yan
- Department of Cancer Biology, Mayo Clinic Comprehensive Cancer Center, Mayo Clinic, 4500 San Pablo Road, Jacksonville, Florida 32224, USA
| | - Sahra Borges
- Department of Cancer Biology, Mayo Clinic Comprehensive Cancer Center, Mayo Clinic, 4500 San Pablo Road, Jacksonville, Florida 32224, USA
| | - Edith A. Perez
- Division of Hematology/Oncology, Mayo Clinic, 4500 San Pablo Road, Jacksonville, Florida 32224, USA
| | - Peter Storz
- Department of Cancer Biology, Mayo Clinic Comprehensive Cancer Center, Mayo Clinic, 4500 San Pablo Road, Jacksonville, Florida 32224, USA
| | - John A. Copland
- Department of Cancer Biology, Mayo Clinic Comprehensive Cancer Center, Mayo Clinic, 4500 San Pablo Road, Jacksonville, Florida 32224, USA
| | - Tushar Patel
- Department of Cancer Biology, Mayo Clinic Comprehensive Cancer Center, Mayo Clinic, 4500 San Pablo Road, Jacksonville, Florida 32224, USA
| | - E. Aubrey Thompson
- Department of Cancer Biology, Mayo Clinic Comprehensive Cancer Center, Mayo Clinic, 4500 San Pablo Road, Jacksonville, Florida 32224, USA
| | - Sandra Citi
- Department of Cell Biology and Institute of Genetics and Genomics of Geneva, University of Geneva, 30 quai Ernest-Ansermet, CH-1211, Geneva 4, Switzerland
| | - Panos Z. Anastasiadis
- Department of Cancer Biology, Mayo Clinic Comprehensive Cancer Center, Mayo Clinic, 4500 San Pablo Road, Jacksonville, Florida 32224, USA
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Sun L, Chua CYX, Tian W, Zhang Z, Chiao PJ, Zhang W. MicroRNA Signaling Pathway Network in Pancreatic Ductal Adenocarcinoma. J Genet Genomics 2015; 42:563-577. [PMID: 26554910 DOI: 10.1016/j.jgg.2015.07.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2015] [Revised: 07/16/2015] [Accepted: 07/22/2015] [Indexed: 01/15/2023]
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is considered to be the most lethal and aggressive malignancy with high mortality and poor prognosis. Their responses to current multimodal therapeutic regimens are limited. It is urgently needed to identify the molecular mechanism underlying pancreatic oncogenesis. Twelve core signaling cascades have been established critical in PDAC tumorigenesis by governing a wide variety of cellular processes. MicroRNAs (miRNAs) are aberrantly expressed in different types of tumors and play pivotal roles as post-transcriptional regulators of gene expression. Here, we will describe how miRNAs regulate different signaling pathways that contribute to pancreatic oncogenesis and progression.
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Affiliation(s)
- Longhao Sun
- Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston 77030, USA; Department of General Surgery, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - Corrine Ying Xuan Chua
- Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston 77030, USA; The University of Texas Graduate School of Biomedical Sciences, Houston 77030, USA
| | - Weijun Tian
- Department of General Surgery, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - Zhixiang Zhang
- Department of General Surgery, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - Paul J Chiao
- Department of Molecular and Cellular Oncology, The University of Texas MD Anderson Cancer Center, Houston 77030, USA; The University of Texas Graduate School of Biomedical Sciences, Houston 77030, USA
| | - Wei Zhang
- Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston 77030, USA; Department of Molecular and Cellular Oncology, The University of Texas MD Anderson Cancer Center, Houston 77030, USA; The University of Texas Graduate School of Biomedical Sciences, Houston 77030, USA; Department of General Surgery, Tianjin Medical University General Hospital, Tianjin 300052, China.
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Xia YY, Yin L, Jiang N, Guo WJ, Tian H, Jiang XS, Wu J, Chen M, Wu JZ, He X. Downregulating HMGA2 attenuates epithelial-mesenchymal transition-induced invasion and migration in nasopharyngeal cancer cells. Biochem Biophys Res Commun 2015; 463:357-63. [PMID: 26025649 DOI: 10.1016/j.bbrc.2015.05.068] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Accepted: 05/17/2015] [Indexed: 12/12/2022]
Abstract
BACKGROUND Epithelial-mesenchymal transition (EMT) is associated with invasion and metastasis of cancer cells. High-mobility group AT-hook 2 (HMGA2) has been found to play a critical role in EMT in a number of malignant tumors. However, whether HMGA2 regulates the EMT in human nasopharyngeal carcinoma (NPC) is unclear. OBJECTIVE The aim of this study was to investigate the effect and mechanism of HMGA2 in inducing invasion and migration in NPC. METHODS In NPC tissues samples, the association of HMGA2 mRNA expression with clinicopathological characteristics were estimated by real-time quantitative RT-PCR(qRT-PCR). In vitro, following the silencing of HMGA2 in CNE-1 and CNE-2 cell lines, the viability and metastatic ability were analyzed using Cell Counting Kit-8 (CCK8), colony formation assay, and transwell assay. EMT and transforming growth factor-beta (TGFβ)/Smad3 signaling pathway-related protein expression changes were evaluated using western blot. RESULTS HMGA2 was upregulated in NPC cell lines and clinical specimens (P < 0.01), and HMGA2 expression correlated significantly with metastasis (P = 0.02) and disease-free survival of NPC (hazard ratio: 3.52; 95% confidence interval: 1.34-7.79; P = 0.01). In addition, following in vitro knockdown of HMGA2, the aggressiveness of cells was markedly inhibited, Vimentin and Snail level was downregulated and E-cadherin expression was upregulated. Moreover, the expression of key proteins TGFβRII and p-Smad3 of the TGFβ/Smad3 signaling pathway was inhibited by the downregulation of HMGA2. CONCLUSION HMGA2 might maintain EMT-induced invasion and migration through the TGFβ/Smad3 signaling pathway in NPC cell lines.
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Affiliation(s)
- You-You Xia
- Department of Radiation Oncology, Lianyungang First People's Hospital, Lianyungang, Jiangsu, China; The Fourth Clinical Medical College of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Li Yin
- Department of Radiation Oncology, The Affiliated Jiangsu Cancer Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Ning Jiang
- Department of Radiation Oncology, The Affiliated Jiangsu Cancer Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Wen-Jie Guo
- Department of Radiation Oncology, The Affiliated Jiangsu Cancer Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Hao Tian
- The Fourth Clinical Medical College of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Xue-Song Jiang
- Department of Radiation Oncology, The Affiliated Jiangsu Cancer Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Jing Wu
- The Fourth Clinical Medical College of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Meng Chen
- The Fourth Clinical Medical College of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Jian-Zhong Wu
- Research Center of Clinical Oncology, The Affiliated Jiangsu Cancer Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Xia He
- Department of Radiation Oncology, The Affiliated Jiangsu Cancer Hospital of Nanjing Medical University, Nanjing, Jiangsu, China.
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Lee J, Ha S, Jung CK, Lee HH. High-mobility-group A2 overexpression provokes a poor prognosis of gastric cancer through the epithelial-mesenchymal transition. Int J Oncol 2015; 46:2431-8. [PMID: 25845850 DOI: 10.3892/ijo.2015.2947] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2015] [Accepted: 03/19/2015] [Indexed: 11/06/2022] Open
Abstract
Tumor metastases are the ultimate target in cancer therapy. In epithelial malignancies, the expression of high-mobility-group A2 (HMGA2) is associated with disease progression and the epithelial-mesenchymal transition (EMT), which is involved in the metastatic process. The present study assessed the clinical and molecular effects of HMGA2 with the malignant tissues of 170 patients with gastric cancer and gastric cancer cells expressing HMGA2. HMGA2 expression was determined using immunohistochemistry and analyzed with respect to the clinicopathological data of patients with this tumor. In the gastric cancer cell line MKN28, in which HMGA2 was knocked down by two different short-hairpin RNAs, Transwell migration and invasion assays were conducted and western blotting was used to detect the altered expression of EMT markers. In patients with gastric cancer, HMGA2 overexpression correlated with tumor progression and was indicative of a significantly worse overall survival. Migration and invasion assays using HMGA2-knocked down MKN28 cells showed a reduction in cell migration and invasion. The upregulation of E-cadherin, an epithelial marker, and the downregulation of N-cadherin, a mesenchymal marker were observed in HMGA2-knocked down cells. In addition, expression of the transcriptional factors Snail and Zeb1 and of the EMT-pathway molecule β-catenin were decreased. HMGA2 overexpression, through its relationship to EMT, thus seems to aggravate invasion and metastasis in gastric cancer. It may therefore serve as a predictive marker in determining the clinical outcome of patients with gastric cancer and offer a promising therapeutic target.
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Affiliation(s)
- Junhyun Lee
- Division of Gastrointestinal Surgery, Department of Surgery, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Shinjung Ha
- Division of Gastrointestinal Surgery, Department of Surgery, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Chan-Kwon Jung
- Department of Pathology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Han Hong Lee
- Division of Gastrointestinal Surgery, Department of Surgery, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
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Schomaker M, Heinemann D, Kalies S, Willenbrock S, Wagner S, Nolte I, Ripken T, Murua Escobar H, Meyer H, Heisterkamp A. Characterization of nanoparticle mediated laser transfection by femtosecond laser pulses for applications in molecular medicine. J Nanobiotechnology 2015; 13:10. [PMID: 25645721 PMCID: PMC4323028 DOI: 10.1186/s12951-014-0057-1] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Accepted: 12/01/2014] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND In molecular medicine, the manipulation of cells is prerequisite to evaluate genes as therapeutic targets or to transfect cells to develop cell therapeutic strategies. To achieve these purposes it is essential that given transfection techniques are capable of handling high cell numbers in reasonable time spans. To fulfill this demand, an alternative nanoparticle mediated laser transfection method is presented herein. The fs-laser excitation of cell-adhered gold nanoparticles evokes localized membrane permeabilization and enables an inflow of extracellular molecules into cells. RESULTS The parameters for an efficient and gentle cell manipulation are evaluated in detail. Efficiencies of 90% with a cell viability of 93% were achieved for siRNA transfection. The proof for a molecular medical approach is demonstrated by highly efficient knock down of the oncogene HMGA2 in a rapidly proliferating prostate carcinoma in vitro model using siRNA. Additionally, investigations concerning the initial perforation mechanism are conducted. Next to theoretical simulations, the laser induced effects are experimentally investigated by spectrometric and microscopic analysis. The results indicate that near field effects are the initial mechanism of membrane permeabilization. CONCLUSION This methodical approach combined with an automated setup, allows a high throughput targeting of several 100,000 cells within seconds, providing an excellent tool for in vitro applications in molecular medicine. NIR fs lasers are characterized by specific advantages when compared to lasers employing longer (ps/ns) pulses in the visible regime. The NIR fs pulses generate low thermal impact while allowing high penetration depths into tissue. Therefore fs lasers could be used for prospective in vivo applications.
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Affiliation(s)
- Markus Schomaker
- Department of Biomedical Optics, Laser Zentrum Hannover, Hollerithallee 8, 30419, Hannover, Germany.
| | - Dag Heinemann
- Department of Biomedical Optics, Laser Zentrum Hannover, Hollerithallee 8, 30419, Hannover, Germany.
| | - Stefan Kalies
- Department of Biomedical Optics, Laser Zentrum Hannover, Hollerithallee 8, 30419, Hannover, Germany.
| | - Saskia Willenbrock
- Small Animal Clinic, University of Veterinary Medicine Hannover, Bünteweg 9, 30559, Hannover, Germany.
| | - Siegfried Wagner
- Small Animal Clinic, University of Veterinary Medicine Hannover, Bünteweg 9, 30559, Hannover, Germany.
| | - Ingo Nolte
- Small Animal Clinic, University of Veterinary Medicine Hannover, Bünteweg 9, 30559, Hannover, Germany.
| | - Tammo Ripken
- Department of Biomedical Optics, Laser Zentrum Hannover, Hollerithallee 8, 30419, Hannover, Germany.
| | - Hugo Murua Escobar
- Small Animal Clinic, University of Veterinary Medicine Hannover, Bünteweg 9, 30559, Hannover, Germany. .,Department of Hematology, Oncology, and Palliative Medicine, University of Rostock, Ernst- Heydemann-Str. 6, 18057, Rostock, Germany.
| | - Heiko Meyer
- Department of Biomedical Optics, Laser Zentrum Hannover, Hollerithallee 8, 30419, Hannover, Germany. .,Department of Cardiothoracic Transplantation and Vascular Surgery, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany.
| | - Alexander Heisterkamp
- Department of Biomedical Optics, Laser Zentrum Hannover, Hollerithallee 8, 30419, Hannover, Germany. .,Institut für Quantenoptik Leibniz Universität Hannover Welfengarten 1, 30167, Hannover, Germany.
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Kaur H, Hütt-Cabezas M, Weingart MF, Xu J, Kuwahara Y, Erdreich-Epstein A, Weissman BE, Eberhart CG, Raabe EH. The chromatin-modifying protein HMGA2 promotes atypical teratoid/rhabdoid cell tumorigenicity. J Neuropathol Exp Neurol 2015; 74:177-85. [PMID: 25575139 PMCID: PMC4695975 DOI: 10.1097/nen.0000000000000161] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Atypical teratoid/rhabdoid tumor (AT/RT) is an aggressive pediatric central nervous system tumor. The poor prognosis of AT/RT warrants identification of novel therapeutic targets and strategies. High-mobility Group AT-hook 2 (HMGA2) is a developmentally important chromatin-modifying protein that positively regulates tumor growth, self-renewal, and invasion in other cancer types. High-mobility group A2 was recently identified as being upregulated in AT/RT tissue, but the role of HMGA2 in brain tumors remains unknown. We used lentiviral short-hairpin RNA to suppress HMGA2 in AT/RT cell lines and found that loss of HMGA2 led to decreased cell growth, proliferation, and colony formation and increased apoptosis. We also found that suppression of HMGA2 negatively affected in vivo orthotopic xenograft tumor growth, more than doubling median survival of mice from 58 days to 153 days. Our results indicate a role for HMGA2 in AT/RT in vitro and in vivo and demonstrate that HMGA2 is a potential therapeutic target in these lethal pediatric tumors.
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Affiliation(s)
- Harpreet Kaur
- From the Division of Neuropathology and Sidney Kimmel Comprehensive Cancer Center (HK, MH-C, MFW, CGE, EHR), Division of Pediatric Oncology (EHR), Johns Hopkins University School of Medicine, Bloomberg Children's Hospital, Baltimore, Maryland; Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, North Carolina (YK, BEW); and Division of Hematology, Oncology, and Blood and Bone Marrow Transplant, Children's Hospital Los Angeles (JX, AE-E); and the University of Southern California (AE-E), Los Angeles, California
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Xia YY, Yin L, Tian H, Guo WJ, Jiang N, Jiang XS, Wu J, Chen M, Wu JZ, He X. HMGA2 is associated with epithelial-mesenchymal transition and can predict poor prognosis in nasopharyngeal carcinoma. Onco Targets Ther 2015; 8:169-76. [PMID: 25653540 PMCID: PMC4303461 DOI: 10.2147/ott.s74397] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Objective High-mobility group protein 2 (HMGA2) and epithelial–mesenchymal transition (EMT)-associated proteins play key roles in cancer progression and metastasis. However, the clinical significance of HMGA2 and its relationship with EMT markers in nasopharyngeal carcinoma (NPC) is unclear. This study aimed to assess the clinicopathological significance and prognostic value of HMGA2, E-cadherin, and vimentin in NPC. Methods Using immunohistochemistry, HMGA2, E-cadherin, and vimentin expression levels were evaluated in NPC (n=124) and non-tumoral inflammatory nasopharynx (n=20) tissues. The association of HMGA2 and EMT markers with clinicopathological characteristics and relationships between the protein levels and overall survival were analyzed. Results Compared with non-tumorous tissues, HMGA2 and vimentin levels were markedly increased in NPC tissues, whereas decreased E-cadherin levels were observed (P<0.001). Moreover, HMGA2 expression was positively correlated with vimentin levels (r=0.431, P<0.001) and negatively correlated with E-cadherin amounts (r=−0.413, P<0.001) in NPC tissues. The expression of all three proteins correlated significantly with tumor N stage, TNM stage, and 2-year metastasis. Furthermore, significant correlations were found for T stage, N stage, TNM stage, HMGA2, E-cadherin, and vimentin (all P<0.013) with poor prognosis (univariate analysis). However, multivariate analyses showed that only HMGA2 (hazard ratio [HR]: 2.683, 95% confidence interval [CI]: 1.185–6.077, P=0.018) and N stage (HR: 7.892, 95% CI: 2.731–22.807, P<0.001) were independent predictors of poor prognosis. Conclusion These results demonstrated that HMGA2, an independent prognostic factor, may promote NPC progression and metastasis, and is significantly associated with EMT proteins. Therefore, HMGA2 may be considered a potential therapeutic target in NPC.
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Affiliation(s)
- You-You Xia
- The Fourth Clinical Medical College of Nanjing Medical University, Nanjing, Jiangsu, People's Republic of China
| | - Li Yin
- Department of Radiation Oncology, The Affiliated Jiangsu Cancer Hospital of Nanjing Medical University, Nanjing, Jiangsu, People's Republic of China
| | - Hao Tian
- The Fourth Clinical Medical College of Nanjing Medical University, Nanjing, Jiangsu, People's Republic of China
| | - Wen-Jie Guo
- Department of Radiation Oncology, The Affiliated Jiangsu Cancer Hospital of Nanjing Medical University, Nanjing, Jiangsu, People's Republic of China
| | - Ning Jiang
- Department of Radiation Oncology, The Affiliated Jiangsu Cancer Hospital of Nanjing Medical University, Nanjing, Jiangsu, People's Republic of China
| | - Xue-Song Jiang
- Department of Radiation Oncology, The Affiliated Jiangsu Cancer Hospital of Nanjing Medical University, Nanjing, Jiangsu, People's Republic of China
| | - Jing Wu
- The Fourth Clinical Medical College of Nanjing Medical University, Nanjing, Jiangsu, People's Republic of China
| | - Meng Chen
- The Fourth Clinical Medical College of Nanjing Medical University, Nanjing, Jiangsu, People's Republic of China
| | - Jian-Zhong Wu
- Research Center of Clinical Oncology, The Affiliated Jiangsu Cancer Hospital of Nanjing Medical University, Nanjing, Jiangsu, People's Republic of China
| | - Xia He
- Department of Radiation Oncology, The Affiliated Jiangsu Cancer Hospital of Nanjing Medical University, Nanjing, Jiangsu, People's Republic of China
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Liang JW, Shi ZZ, Shen TY, Che X, Wang Z, Shi SS, Xu X, Cai Y, Zhao P, Wang CF, Zhou ZX, Wang MR. Identification of genomic alterations in pancreatic cancer using array-based comparative genomic hybridization. PLoS One 2014; 9:e114616. [PMID: 25502777 PMCID: PMC4263743 DOI: 10.1371/journal.pone.0114616] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2014] [Accepted: 11/12/2014] [Indexed: 12/13/2022] Open
Abstract
Background Genomic aberration is a common feature of human cancers and also is one of the basic mechanisms that lead to overexpression of oncogenes and underexpression of tumor suppressor genes. Our study aims to identify frequent genomic changes in pancreatic cancer. Materials and Methods We used array comparative genomic hybridization (array CGH) to identify recurrent genomic alterations and validated the protein expression of selected genes by immunohistochemistry. Results Sixteen gains and thirty-two losses occurred in more than 30% and 60% of the tumors, respectively. High-level amplifications at 7q21.3–q22.1 and 19q13.2 and homozygous deletions at 1p33–p32.3, 1p22.1, 1q22, 3q27.2, 6p22.3, 6p21.31, 12q13.2, 17p13.2, 17q21.31 and 22q13.1 were identified. Especially, amplification of AKT2 was detected in two carcinomas and homozygous deletion of CDKN2C in other two cases. In 15 independent validation samples, we found that AKT2 (19q13.2) and MCM7 (7q22.1) were amplified in 6 and 9 cases, and CAMTA2 (17p13.2) and PFN1 (17p13.2) were homozygously deleted in 3 and 1 cases. AKT2 and MCM7 were overexpressed, and CAMTA2 and PFN1 were underexpressed in pancreatic cancer tissues than in morphologically normal operative margin tissues. Both GISTIC and Genomic Workbench software identified 22q13.1 containing APOBEC3A and APOBEC3B as the only homozygous deletion region. And the expression levels of APOBEC3A and APOBEC3B were significantly lower in tumor tissues than in morphologically normal operative margin tissues. Further validation showed that overexpression of PSCA was significantly associated with lymph node metastasis, and overexpression of HMGA2 was significantly associated with invasive depth of pancreatic cancer. Conclusion These recurrent genomic changes may be useful for revealing the mechanism of pancreatic carcinogenesis and providing candidate biomarkers.
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Affiliation(s)
- Jian-Wei Liang
- Department of Abdominal Surgical Oncology, Cancer Hospital and Institute, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China
| | - Zhi-Zhou Shi
- Faculty of Medicine, Kunming University of Science and Technology, Kunming, China
- * E-mail: (MRW); (ZZS)
| | - Tian-Yun Shen
- Faculty of Medicine, Kunming University of Science and Technology, Kunming, China
| | - Xu Che
- Department of Abdominal Surgical Oncology, Cancer Hospital and Institute, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China
| | - Zheng Wang
- Department of Abdominal Surgical Oncology, Cancer Hospital and Institute, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China
| | - Su-Sheng Shi
- Department of Pathology, Cancer Hospital and Institute, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China
| | - Xin Xu
- State Key Laboratory of Molecular Oncology, Cancer Hospital and Institute, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China
| | - Yan Cai
- State Key Laboratory of Molecular Oncology, Cancer Hospital and Institute, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China
| | - Ping Zhao
- Department of Abdominal Surgical Oncology, Cancer Hospital and Institute, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China
| | - Cheng-Feng Wang
- Department of Abdominal Surgical Oncology, Cancer Hospital and Institute, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China
| | - Zhi-Xiang Zhou
- Department of Abdominal Surgical Oncology, Cancer Hospital and Institute, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China
| | - Ming-Rong Wang
- State Key Laboratory of Molecular Oncology, Cancer Hospital and Institute, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China
- * E-mail: (MRW); (ZZS)
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79
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Lucero-Acuña A, Jeffery JJ, Abril ER, Nagle RB, Guzman R, Pagel MD, Meuillet EJ. Nanoparticle delivery of an AKT/PDK1 inhibitor improves the therapeutic effect in pancreatic cancer. Int J Nanomedicine 2014; 9:5653-65. [PMID: 25516710 PMCID: PMC4263440 DOI: 10.2147/ijn.s68511] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
The K-ras mutation in pancreatic cancer can inhibit drug delivery and increase drug resistance. This is exemplified by the therapeutic effect of PH-427, a small molecule inhibitor of AKT/PDK1, which has shown a good therapeutic effect against a BxPC3 pancreatic cancer model that has K-ras, but has a poor therapeutic effect against a MiaPaCa-2 pancreatic cancer model with mutant K-ras. To increase the therapeutic effect of PH-427 against the MiaPaCa-2 pancreatic cancer model with mutant K-ras, we encapsulated PH-427 into poly(lactic-co-glycolic acid) nanoparticles (PNP) to form drug-loaded PH-427-PNP. PH-427 showed a biphasic release from PH-427-PNP over 30 days during studies in sodium phosphate buffer, and in vitro studies revealed that the PNP was rapidly internalized into MiaPaCa-2 tumor cells, suggesting that PNP can improve PH-427 delivery into cells harboring mutant K-ras. In vivo studies of an orthotopic MiaPaCa-2 pancreatic cancer model showed reduced tumor load with PH-427-PNP as compared with treatment using PH-427 alone or with no treatment. Ex vivo studies confirmed the in vivo results, suggesting that PNP can improve drug delivery to pancreatic cancer harboring mutant K-ras.
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Affiliation(s)
- Armando Lucero-Acuña
- Department of Chemical and Environmental Engineering, University of Arizona, Tucson, AZ, USA
| | - Justin J Jeffery
- Department of Biomedical Engineering, University of Arizona, Tucson, AZ, USA
| | - Edward R Abril
- University of Arizona Cancer Center, University of Arizona, Tucson, AZ, USA ; Department of Pathology, University of Arizona, Tucson, AZ, USA
| | - Raymond B Nagle
- University of Arizona Cancer Center, University of Arizona, Tucson, AZ, USA ; Department of Pathology, University of Arizona, Tucson, AZ, USA
| | - Roberto Guzman
- Department of Chemical and Environmental Engineering, University of Arizona, Tucson, AZ, USA
| | - Mark D Pagel
- Department of Biomedical Engineering, University of Arizona, Tucson, AZ, USA ; University of Arizona Cancer Center, University of Arizona, Tucson, AZ, USA ; Department of Chemistry and Biochemistry, University of Arizona, Tucson, AZ, USA ; Department of Medical Imaging, University of Arizona, Tucson, AZ, USA
| | - Emmanuelle J Meuillet
- University of Arizona Cancer Center, University of Arizona, Tucson, AZ, USA ; Department of Molecular and Cell Biology, University of Arizona, Tucson, AZ, USA ; Department of Nutritional Sciences, University of Arizona, Tucson, AZ, USA
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Kang R, Chen R, Zhang Q, Hou W, Wu S, Cao L, Huang J, Yu Y, Fan XG, Yan Z, Sun X, Wang H, Wang Q, Tsung A, Billiar TR, Zeh HJ, Lotze MT, Tang D. HMGB1 in health and disease. Mol Aspects Med 2014; 40:1-116. [PMID: 25010388 PMCID: PMC4254084 DOI: 10.1016/j.mam.2014.05.001] [Citation(s) in RCA: 683] [Impact Index Per Article: 68.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Accepted: 05/05/2014] [Indexed: 12/22/2022]
Abstract
Complex genetic and physiological variations as well as environmental factors that drive emergence of chromosomal instability, development of unscheduled cell death, skewed differentiation, and altered metabolism are central to the pathogenesis of human diseases and disorders. Understanding the molecular bases for these processes is important for the development of new diagnostic biomarkers, and for identifying new therapeutic targets. In 1973, a group of non-histone nuclear proteins with high electrophoretic mobility was discovered and termed high-mobility group (HMG) proteins. The HMG proteins include three superfamilies termed HMGB, HMGN, and HMGA. High-mobility group box 1 (HMGB1), the most abundant and well-studied HMG protein, senses and coordinates the cellular stress response and plays a critical role not only inside of the cell as a DNA chaperone, chromosome guardian, autophagy sustainer, and protector from apoptotic cell death, but also outside the cell as the prototypic damage associated molecular pattern molecule (DAMP). This DAMP, in conjunction with other factors, thus has cytokine, chemokine, and growth factor activity, orchestrating the inflammatory and immune response. All of these characteristics make HMGB1 a critical molecular target in multiple human diseases including infectious diseases, ischemia, immune disorders, neurodegenerative diseases, metabolic disorders, and cancer. Indeed, a number of emergent strategies have been used to inhibit HMGB1 expression, release, and activity in vitro and in vivo. These include antibodies, peptide inhibitors, RNAi, anti-coagulants, endogenous hormones, various chemical compounds, HMGB1-receptor and signaling pathway inhibition, artificial DNAs, physical strategies including vagus nerve stimulation and other surgical approaches. Future work further investigating the details of HMGB1 localization, structure, post-translational modification, and identification of additional partners will undoubtedly uncover additional secrets regarding HMGB1's multiple functions.
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Affiliation(s)
- Rui Kang
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA.
| | - Ruochan Chen
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA
| | - Qiuhong Zhang
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA
| | - Wen Hou
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA
| | - Sha Wu
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA
| | - Lizhi Cao
- Department of Pediatrics, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Jin Huang
- Department of Oncology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Yan Yu
- Department of Pediatrics, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Xue-Gong Fan
- Department of Infectious Diseases, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Zhengwen Yan
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA; Department of Neurology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Guangdong 510120, China
| | - Xiaofang Sun
- Key Laboratory for Major Obstetric Diseases of Guangdong Province, Key Laboratory of Reproduction and Genetics of Guangdong Higher Education Institutes, Experimental Department of Institute of Gynecology and Obstetrics, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510510, China
| | - Haichao Wang
- Laboratory of Emergency Medicine, The Feinstein Institute for Medical Research, Manhasset, NY 11030, USA
| | - Qingde Wang
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA
| | - Allan Tsung
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA
| | - Timothy R Billiar
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA
| | - Herbert J Zeh
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA
| | - Michael T Lotze
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA
| | - Daolin Tang
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA.
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Marino ALF, Evangelista AF, Vieira RAC, Macedo T, Kerr LM, Abrahão-Machado LF, Longatto-Filho A, Silveira HCS, Marques MMC. MicroRNA expression as risk biomarker of breast cancer metastasis: a pilot retrospective case-cohort study. BMC Cancer 2014; 14:739. [PMID: 25277099 PMCID: PMC4195914 DOI: 10.1186/1471-2407-14-739] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2013] [Accepted: 09/26/2014] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND MicroRNAs (miRNAs) are small, non-coding RNA molecules involved in post-transcriptional gene regulation and have recently been shown to play a role in cancer metastasis. In solid tumors, especially breast cancer, alterations in miRNA expression contribute to cancer pathogenesis, including metastasis. Considering the emerging role of miRNAs in metastasis, the identification of predictive markers is necessary to further the understanding of stage-specific breast cancer development. This is a retrospective analysis that aimed to identify molecular biomarkers related to distant breast cancer metastasis development. METHODS A retrospective case cohort study was performed in 64 breast cancer patients treated during the period from 1998-2001. The case group (n = 29) consisted of patients with a poor prognosis who presented with breast cancer recurrence or metastasis during follow up. The control group (n = 35) consisted of patients with a good prognosis who did not develop breast cancer recurrence or metastasis. These patient groups were stratified according to TNM clinical stage (CS) I, II and III, and the main clinical features of the patients were homogeneous. MicroRNA profiling was performed and biomarkers related to metastatic were identified independent of clinical stage. Finally, a hazard risk analysis of these biomarkers was performed to evaluate their relation to metastatic potential. RESULTS MiRNA expression profiling identified several miRNAs that were both specific and shared across all clinical stages (p ≤ 0.05). Among these, we identified miRNAs previously associated with cell motility (let-7 family) and distant metastasis (hsa-miR-21). In addition, hsa-miR-494 and hsa-miR-21 were deregulated in metastatic cases of CSI and CSII. Furthermore, metastatic miRNAs shared across all clinical stages did not present high sensitivity and specificity when compared to specific-CS miRNAs. Between them, hsa-miR-183 was the most significative of CSII, which miRNAs combination for CSII (hsa-miR-494, hsa-miR-183 and hsa-miR-21) was significant and were a more effective risk marker compared to the single miRNAs. CONCLUSIONS Women with metastatic breast cancer, especially CSII, presented up-regulated levels of miR-183, miR-494 and miR-21, which were associated with a poor prognosis. These miRNAs therefore represent new risk biomarkers of breast cancer metastasis and may be useful for future targeted therapies.
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Affiliation(s)
- Augusto LF Marino
- />Molecular Oncology Research Center, Barretos Cancer Hospital, Barretos, 14784-400 Brazil
| | - Adriane F Evangelista
- />Molecular Oncology Research Center, Barretos Cancer Hospital, Barretos, 14784-400 Brazil
| | - René AC Vieira
- />Department of Mastology and Breast Reconstruction, Barretos Cancer Hospital, Barretos, 14784-400 SP Brazil
| | - Taciane Macedo
- />Molecular Oncology Research Center, Barretos Cancer Hospital, Barretos, 14784-400 Brazil
| | - Ligia M Kerr
- />Department of Pathology, Barretos Cancer Hospital, CEP: 14784-400 Barretos, SP Brazil
| | | | - Adhemar Longatto-Filho
- />Molecular Oncology Research Center, Barretos Cancer Hospital, Barretos, 14784-400 Brazil
- />Laboratory of Medical Investigation (LIM) 14, Department of Pathology, University of São Paulo School of Medicine, São Paulo, SP 1246903 Brazil
- />Life and Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, 4704-553 Braga, Portugal
- />ICVS/3B’s-PT Government Associate Laboratory, 4710-057 Braga/Guimarães, Portugal
| | - Henrique CS Silveira
- />Molecular Oncology Research Center, Barretos Cancer Hospital, Barretos, 14784-400 Brazil
| | - Marcia MC Marques
- />Molecular Oncology Research Center, Barretos Cancer Hospital, Barretos, 14784-400 Brazil
- />Barretos School of Health Sciences - FACISB, Barretos, São Paulo Brazil
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HMGA2 induces transcription factor Slug expression to promote epithelial-to-mesenchymal transition and contributes to colon cancer progression. Cancer Lett 2014; 355:130-40. [PMID: 25218351 DOI: 10.1016/j.canlet.2014.09.007] [Citation(s) in RCA: 105] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2014] [Revised: 09/03/2014] [Accepted: 09/04/2014] [Indexed: 01/09/2023]
Abstract
Epithelial-to-mesenchymal transition (EMT) is considered to play an essential role in progression and metastasis. This study aims to investigate the expression and underlying molecular targets of high-mobility group AT-hook 2 (HMGA2) in the progression of colon cancer. The expression of HMGA2 is upregulated by both active extracellular signal-regulated kinase (ERK)1/2 and TGF-β signaling in colon cancer cells through a series of lentiviral infection and pharmacological assays. HMGA2 knockdown by specific shRNAs attenuates proliferation, motility and invasion of colon cancer cells in vitro and in vivo. Besides, exogenous HMGA2 expression caused EMT in colon cancer cells, which was confirmed by the downregulation of the epithelial markers and the upregulation of the mesenchymal markers. Moreover, HMGA2 positively regulates the Slug expression by directly binding to the regulatory region in Slug promoter. Importantly, the knockdown of Slug could reverse the HMGA2-induced EMT and decrease the migration and invasion ability of colon cancer cells. Taken together, our results reveal a critical role for HMGA2 in promoting EMT, migration, invasion, and proliferation of colon cancer cells, suggesting HMGA2 as a potential molecular target to prevent colon cancer progression.
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Role of miRNA let-7 and its major targets in prostate cancer. BIOMED RESEARCH INTERNATIONAL 2014; 2014:376326. [PMID: 25276782 PMCID: PMC4168040 DOI: 10.1155/2014/376326] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/16/2014] [Revised: 08/11/2014] [Accepted: 08/18/2014] [Indexed: 12/21/2022]
Abstract
Prostate cancer is worldwide the sixth leading cause of cancer related death in men thus early detection and successful treatment are still of major interest. The commonly performed screening of the prostate-specific antigen (PSA) is controversially discussed, as in many patients the prostate-specific antigen levels are chronically elevated in the absence of cancer. Due to the unsatisfying efficiency of available prostate cancer screening markers and the current treatment outcome of the aggressive hormone refractory prostate cancer, the evaluation of novel molecular markers and targets is considered an issue of high importance. MicroRNAs are relatively stable in body fluids orchestrating simultaneously the expression of many genes. These molecules are currently discussed to bear a greater diagnostic potential than protein-coding genes, being additionally promising therapeutic drugs and/or targets. Herein we review the potential impact of the microRNA let-7 family on prostate cancer and show how deregulation of several of its target genes could influence the cellular equilibrium in the prostate gland, promoting cancer development as they do in a variety of other human malignant neoplasias.
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84
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Liu H, Li P, Li B, Sun P, Zhang J, Wang B, Jia B. RKIP inhibits gastric cancer cell survival and invasion by regulating the expression of HMGA2 and OPN. Tumour Biol 2014; 35:11949-58. [PMID: 25172097 DOI: 10.1007/s13277-014-2486-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2014] [Accepted: 08/08/2014] [Indexed: 12/28/2022] Open
Abstract
The objective of this study was to explore the mechanism via which Raf kinase inhibitor protein (RKIP) suppresses the invasion of gastric cancer cells and promote apoptosis, with an attempt to provide evidences for the application of RKIP in treating gastric cancer. The recombinant plasmid pcDNA3.1-RKIP or RKIP-shRNA was transfected into the gastric cancer cell line SGC-7901 using liposome. Then, the messenger RNA (mRNA) and protein expressions of RKIP, HMGA2, and OPN were detected using qPCR and Western blotting. The effects of HMGA2 on the proliferation, apoptosis, and invasion of SGC-7901 cells were detected using flow cytometry and Transwell assay. To further explore the regulatory effect of PKIP on the biological activities of HMGA2, we over-expressed or knock down RKIP and HMGA2 simultaneously and detected its effects on the proliferation, apoptosis, and invasion of SGC-7901 cells. As shown by qPCR and Western blotting, after over-expression of RKIP in SGC-7901 cells, the mRNA and protein expressions of RKIP significantly increased (P < 0.01), whereas the mRNA and protein expressions of HMGA2 and OPN significantly decreased (P < 0.01). In contrast, the transfection of RKIP-shRNA in the SGC-7901 cells resulted in opposite results. After over-expression of HMGA2 in SGC-7901 cells, the protein expression of HMGA2 significantly increased (P < 0.01); however, it significantly decreased after the transfection of HMGA2-shRNA (P < 0.01). As shown by Transwell assay and flow cytometry, After the over-expression of HMGA2 in SGC-7901 cells, the (G2 + S) phase fraction significantly increased (P < 0.01); also, the percentage of the apoptotic cells significantly declined (P < 0.05) and the number of invasive cells significantly increased (P < 0.05). However, the interference of the expression of HMGA2 resulted in opposite results. The simultaneous over-expression of RKIP and HMGA2 in SGC-7901 cells or the simultaneous interference of RKIP and HMGA2 showed no significant difference with the control group in terms of (G2 + S) phase fraction, percentage of apoptotic cells, and number of invasive cells (P > 0.05). In conclusion, RKIP can inhibit the survival and invasion of gastric cancer cells and promote apoptosis, possibly by regulating the expression of HMGA2 or OPN.
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Affiliation(s)
- Hongyi Liu
- Department of Surgical Oncology, General Hospital of Chinese People's Liberation Army, No. 28, Fuxing Rd, Beijing, 100853, People's Republic of China
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85
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Hébrant A, Floor S, Saiselet M, Antoniou A, Desbuleux A, Snyers B, La C, de Saint Aubain N, Leteurtre E, Andry G, Maenhaut C. miRNA expression in anaplastic thyroid carcinomas. PLoS One 2014; 9:e103871. [PMID: 25153510 PMCID: PMC4143225 DOI: 10.1371/journal.pone.0103871] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2012] [Accepted: 07/08/2014] [Indexed: 12/13/2022] Open
Abstract
Anaplastic thyroid carcinoma (ATC) is the most lethal form of thyroid neoplasia and represents an end stage of thyroid tumor progression. No effective treatment exists so far. In this study, we analyzed the miRNA expression profiles of 11 ATC by microarrays and their relationship with the mRNA expression profiles of the same 11 ATC samples. ATC show distinct miRNA expression profiles compared to other less aggressive thyroid tumor types. ATC show 18 commonly deregulated miRNA compared to normal thyroid tissue (17 downregulated and 1 upregulated miRNA). First, the analysis of a combined approach of the mRNA gene expression and of the bioinformatically predicted mRNA targets of the deregulated miRNA suggested a role for these regulations in the epithelial to mesenchymal transition (EMT) process in ATC. Second, the direct interaction between one of the upregulated mRNA target, the LOX gene which is an EMT key player, and a downregulated miRNA, the miR-29a, was experimentally validated by a luciferase assay in HEK cell. Third, we confirmed that the ATC tissue is composed of about 50% of tumor associated macrophages (TAM) and suggested, by taking into account our data and published data, their most likely direct or paracrine intercommunication between them and the thyroid tumor cells, amplifying the tumor aggressiveness. Finally, we demonstrated by in situ hybridization a specific thyrocyte localization of 3 of the deregulated miRNA: let-7g, miR-29a and miR-30e and we pointed out the importance of identifying the cell type localization before drawing any conclusion on the physiopathological role of a given gene.
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Affiliation(s)
- Aline Hébrant
- Institute of Interdisciplinary Research (IRIBHM), School of Medicine, Université libre de Bruxelles, Campus Erasme, Brussels, Belgium
| | - Sébastien Floor
- Institute of Interdisciplinary Research (IRIBHM), School of Medicine, Université libre de Bruxelles, Campus Erasme, Brussels, Belgium
| | - Manuel Saiselet
- Institute of Interdisciplinary Research (IRIBHM), School of Medicine, Université libre de Bruxelles, Campus Erasme, Brussels, Belgium
| | - Aline Antoniou
- Institute of Interdisciplinary Research (IRIBHM), School of Medicine, Université libre de Bruxelles, Campus Erasme, Brussels, Belgium
| | - Alice Desbuleux
- Institute of Interdisciplinary Research (IRIBHM), School of Medicine, Université libre de Bruxelles, Campus Erasme, Brussels, Belgium
| | - Bérengère Snyers
- Institute of Interdisciplinary Research (IRIBHM), School of Medicine, Université libre de Bruxelles, Campus Erasme, Brussels, Belgium
| | - Caroline La
- Institute of Interdisciplinary Research (IRIBHM), School of Medicine, Université libre de Bruxelles, Campus Erasme, Brussels, Belgium
| | | | - Emmanuelle Leteurtre
- Université de Lille 2, Faculté de Médecine, Lille, France
- CHRU de Lille, Institut de Pathologie, Lille, France
| | - Guy Andry
- Institut Jules Bordet, Bruxelles, Belgium
| | - Carine Maenhaut
- Institute of Interdisciplinary Research (IRIBHM), School of Medicine, Université libre de Bruxelles, Campus Erasme, Brussels, Belgium
- WELBIO, School of Medicine, Université libre de Bruxelles, Campus Erasme, Brussels, Belgium
- * E-mail:
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86
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Rhim AD, Oberstein PE, Thomas DH, Mirek ET, Palermo CF, Sastra SA, Dekleva EN, Saunders T, Becerra CP, Tattersall IW, Westphalen CB, Kitajewski J, Fernandez-Barrena MG, Fernandez-Zapico ME, Iacobuzio-Donahue C, Olive KP, Stanger BZ. Stromal elements act to restrain, rather than support, pancreatic ductal adenocarcinoma. Cancer Cell 2014; 25:735-47. [PMID: 24856585 PMCID: PMC4096698 DOI: 10.1016/j.ccr.2014.04.021] [Citation(s) in RCA: 1510] [Impact Index Per Article: 151.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2013] [Revised: 03/18/2014] [Accepted: 04/25/2014] [Indexed: 12/11/2022]
Abstract
Sonic hedgehog (Shh), a soluble ligand overexpressed by neoplastic cells in pancreatic ductal adenocarcinoma (PDAC), drives formation of a fibroblast-rich desmoplastic stroma. To better understand its role in malignant progression, we deleted Shh in a well-defined mouse model of PDAC. As predicted, Shh-deficient tumors had reduced stromal content. Surprisingly, such tumors were more aggressive and exhibited undifferentiated histology, increased vascularity, and heightened proliferation--features that were fully recapitulated in control mice treated with a Smoothened inhibitor. Furthermore, administration of VEGFR blocking antibody selectively improved survival of Shh-deficient tumors, indicating that Hedgehog-driven stroma suppresses tumor growth in part by restraining tumor angiogenesis. Together, these data demonstrate that some components of the tumor stroma can act to restrain tumor growth.
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Affiliation(s)
- Andrew D Rhim
- Division of Gastroenterology, Department of Internal Medicine and Comprehensive Cancer Center, University of Michigan Medical School, Ann Arbor, MI 48109, USA; Gastroenterology Division, Department of Medicine and Abramson Family Cancer Research Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Paul E Oberstein
- Division of Hematology and Oncology, Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, NY 10032, USA
| | - Dafydd H Thomas
- Division of Digestive and Liver Diseases in the Department of Medicine, Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, NY 10032, USA; Department of Pathology and Cell Biology, Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, NY 10032, USA
| | - Emily T Mirek
- Gastroenterology Division, Department of Medicine and Abramson Family Cancer Research Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Carmine F Palermo
- Division of Digestive and Liver Diseases in the Department of Medicine, Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, NY 10032, USA; Department of Pathology and Cell Biology, Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, NY 10032, USA
| | - Stephen A Sastra
- Division of Digestive and Liver Diseases in the Department of Medicine, Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, NY 10032, USA; Department of Pathology and Cell Biology, Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, NY 10032, USA
| | - Erin N Dekleva
- Gastroenterology Division, Department of Medicine and Abramson Family Cancer Research Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Tyler Saunders
- Sol Goldman Pancreatic Cancer Research Center and Department of Pathology, Johns Hopkins University, Baltimore, MD 21287, USA
| | - Claudia P Becerra
- Department of Pathology and Cell Biology, Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, NY 10032, USA
| | - Ian W Tattersall
- Department of Pathology and Cell Biology, Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, NY 10032, USA
| | - C Benedikt Westphalen
- Division of Digestive and Liver Diseases in the Department of Medicine, Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, NY 10032, USA
| | - Jan Kitajewski
- Department of Pathology and Cell Biology, Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, NY 10032, USA
| | | | | | - Christine Iacobuzio-Donahue
- Sol Goldman Pancreatic Cancer Research Center and Department of Pathology, Johns Hopkins University, Baltimore, MD 21287, USA
| | - Kenneth P Olive
- Division of Digestive and Liver Diseases in the Department of Medicine, Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, NY 10032, USA; Department of Pathology and Cell Biology, Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, NY 10032, USA.
| | - Ben Z Stanger
- Gastroenterology Division, Department of Medicine and Abramson Family Cancer Research Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.
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87
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H19 promotes pancreatic cancer metastasis by derepressing let-7’s suppression on its target HMGA2-mediated EMT. Tumour Biol 2014; 35:9163-9. [DOI: 10.1007/s13277-014-2185-5] [Citation(s) in RCA: 223] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2014] [Accepted: 06/02/2014] [Indexed: 02/07/2023] Open
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88
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Willenbrock S, Wagner S, Reimann-Berg N, Moulay M, Hewicker-Trautwein M, Nolte I, Escobar HM. Generation and characterisation of a canine EGFP-HMGA2 prostate cancer in vitro model. PLoS One 2014; 9:e98788. [PMID: 24914948 PMCID: PMC4051699 DOI: 10.1371/journal.pone.0098788] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Accepted: 05/07/2014] [Indexed: 12/15/2022] Open
Abstract
The architectural transcription factor HMGA2 is abundantly expressed during embryonic development. In several malignant neoplasias including prostate cancer, high re-expression of HMGA2 is correlated with malignancy and poor prognosis. The let-7 miRNA family is described to regulate HMGA2 negatively. The balance of let-7 and HMGA2 is discussed to play a major role in tumour aetiology. To further analyse the role of HMGA2 in prostate cancer a stable and highly reproducible in vitro model system is precondition. Herein we established a canine CT1258-EGFP-HMGA2 prostate cancer cell line stably overexpressing HMGA2 linked to EGFP and in addition the reference cell line CT1258-EGFP expressing solely EGFP to exclude EGFP-induced effects. Both recombinant cell lines were characterised by fluorescence microscopy, flow cytometry and immunocytochemistry. The proliferative effect of ectopically overexpressed HMGA2 was determined via BrdU assays. Comparative karyotyping of the derived and the initial CT1258 cell lines was performed to analyse chromosome consistency. The impact of the ectopic HMGA2 expression on its regulator let-7a was analysed by quantitative real-time PCR. Fluorescence microscopy and immunocytochemistry detected successful expression of the EGFP-HMGA2 fusion protein exclusively accumulating in the nucleus. Gene expression analyses confirmed HMGA2 overexpression in CT1258-EGFP-HMGA2 in comparison to CT1258-EGFP and native cells. Significantly higher let-7a expression levels were found in CT1258-EGFP-HMGA2 and CT1258-EGFP. The BrdU assays detected an increased proliferation of CT1258-HMGA2-EGFP cells compared to CT1258-EGFP and native CT1258. The cytogenetic analyses of CT1258-EGFP and CT1258-EGFP-HMGA2 resulted in a comparable hyperdiploid karyotype as described for native CT1258 cells. To further investigate the impact of recombinant overexpressed HMGA2 on CT1258 cells, other selected targets described to underlie HMGA2 regulation were screened in addition. The new fluorescent CT1258-EGFP-HMGA2 cell line is a stable tool enabling in vitro and in vivo analyses of the HMGA2-mediated effects on cells and the development and pathogenesis of prostate cancer.
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Affiliation(s)
- Saskia Willenbrock
- Small Animal Clinic, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Siegfried Wagner
- Small Animal Clinic, University of Veterinary Medicine Hannover, Hannover, Germany
- Institute of Biophysics, Leibniz University Hannover, Hannover, Germany
| | - Nicola Reimann-Berg
- Small Animal Clinic, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Mohammed Moulay
- Small Animal Clinic, University of Veterinary Medicine Hannover, Hannover, Germany
| | | | - Ingo Nolte
- Small Animal Clinic, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Hugo Murua Escobar
- Small Animal Clinic, University of Veterinary Medicine Hannover, Hannover, Germany
- Division of Medicine, Haematology, Oncology and Palliative Medicine, University of Rostock, Rostock, Germany
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89
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Mao XG, Hütt-Cabezas M, Orr BA, Weingart M, Taylor I, Rajan AKD, Odia Y, Kahlert U, Maciaczyk J, Nikkhah G, Eberhart CG, Raabe EH. LIN28A facilitates the transformation of human neural stem cells and promotes glioblastoma tumorigenesis through a pro-invasive genetic program. Oncotarget 2014; 4:1050-64. [PMID: 23846349 PMCID: PMC3759665 DOI: 10.18632/oncotarget.1131] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
The cellular reprogramming factor LIN28A promotes tumorigenicity in cancers arising outside the central nervous system, but its role in brain tumors is unknown. We detected LIN28A protein in a subset of human gliomas observed higher expression in glioblastoma (GBM) than in lower grade tumors. Knockdown of LIN28A using lentiviral shRNA in GBM cell lines inhibited their invasion, growth and clonogenicity. Expression of LIN28A in GBM cell lines increased the number and size of orthotopic xenograft tumors. LIN28A expression also enhanced the invasiveness of GBM cells in vitro and in vivo. Increasing LIN28A was associated with down-regulation of tumor suppressing microRNAs let-7b and let-7g and up-regulation of the chromatin modifying protein HMGA2. The increase in tumor cell aggressiveness in vivo and in vitro was accompanied by an upregulation of pro-invasive gene expression, including SNAI1. To further investigate the oncogenic potential of LIN28A, we infected hNSC with lentiviruses encoding LIN28A together with dominant negative R248W-TP53, constitutively active KRAS and hTERT. Resulting subclones proliferated at an increased rate and formed invasive GBM-like tumors in orthotopic xenografts in immunodeficient mice. Similar to LIN28A-transduced GBM neurosphere lines, hNSC-derived tumor cells showed increased expression of HMGA2. Taken together, these data suggest a role for LIN28A in high grade gliomas and illustrate an HMGA2-associated, pro-invasive program that can be activated in GBM by LIN28A-mediated suppression of let-7 microRNAs.
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Affiliation(s)
- Xing-gang Mao
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
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90
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Díaz-López A, Moreno-Bueno G, Cano A. Role of microRNA in epithelial to mesenchymal transition and metastasis and clinical perspectives. Cancer Manag Res 2014; 6:205-16. [PMID: 24812525 PMCID: PMC4008290 DOI: 10.2147/cmar.s38156] [Citation(s) in RCA: 95] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
The microRNAs (miRNAs) are a class of small, 20–22 nucleotides in length, endogenously expressed noncoding RNAs that regulate multiple targets posttranscriptionally. Interestingly, miRNAs have emerged as regulators of most physiological and pathological processes, including metastatic tumor progression, in part by controlling a reversible process called epithelial-to-mesenchymal transition (EMT). The activation of EMT increases the migratory and invasive properties fundamental for tumor cell spread while activation of the reverse mesenchymal-to-epithelial transition is required for metastasis outgrowth. The EMT triggering leads to the activation of a core of transcription factors (EMT-TFs) – SNAIL1/SNAIL2, bHLH (E47, E2-2, and TWIST1/TWIST2), and ZEB1/ZEB2 – that act as E-cadherin repressors and, ultimately, coordinate EMT. Recent evidence indicates that several miRNAs regulate the expression of EMT-TFs or EMT-activating signaling pathways. Interestingly, some miRNAs and EMT-TFs form tightly interconnected negative feedback loops that control epithelial cell plasticity, providing self-reinforcing signals and robustness to maintain the epithelial or mesenchymal cell status. Among the most significant feedback loops, we focus on the ZEB/miR-200 and the SNAIL1/miR-34 networks that hold a clear impact in the regulation of the epithelial-mesenchymal state. Recent insights into the p53 modulation of the EMT-TF/miRNA loops and epigenetic regulatory mechanisms in the context of metastasis dissemination will also be discussed. Understanding the regulation of EMT by miRNAs opens new avenues for the diagnosis and prognosis of tumors and identifies potential therapeutic targets that might help to negatively impact on metastasis dissemination and increasing patient survival.
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Affiliation(s)
- Antonio Díaz-López
- Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de Madrid, Instituto de Investigaciones Biomédicas "Alberto Sols" (CSIC-UAM), IdiPAZ, Madrid, Spain
| | - Gema Moreno-Bueno
- Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de Madrid, Instituto de Investigaciones Biomédicas "Alberto Sols" (CSIC-UAM), IdiPAZ, Madrid, Spain ; Fundación MDAnderson Internacional, Madrid, Spain
| | - Amparo Cano
- Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de Madrid, Instituto de Investigaciones Biomédicas "Alberto Sols" (CSIC-UAM), IdiPAZ, Madrid, Spain
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91
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Abstract
The transdifferentiation of epithelial cells into motile mesenchymal cells, a process known as epithelial-mesenchymal transition (EMT), is integral in development, wound healing and stem cell behaviour, and contributes pathologically to fibrosis and cancer progression. This switch in cell differentiation and behaviour is mediated by key transcription factors, including SNAIL, zinc-finger E-box-binding (ZEB) and basic helix-loop-helix transcription factors, the functions of which are finely regulated at the transcriptional, translational and post-translational levels. The reprogramming of gene expression during EMT, as well as non-transcriptional changes, are initiated and controlled by signalling pathways that respond to extracellular cues. Among these, transforming growth factor-β (TGFβ) family signalling has a predominant role; however, the convergence of signalling pathways is essential for EMT.
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92
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Probing into the biological processes influenced by ESC factor and oncoprotein HMGA2 using iPSCs. Stem Cell Rev Rep 2014; 9:514-22. [PMID: 22547345 DOI: 10.1007/s12015-012-9373-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Induced pluripotent stem cells (iPSCs) are rapidly evolving into an important research tool due to their close resemblance with pluripotent embryonic stem cells (ESCs). Of particular interest at this point are iPSC applications in disease modeling and drug discovery/testing. The high mobility group AT-hook 2 (HMGA2) protein is a nonhistone chromatin factor normally expressed in ESCs and during early developmental stages. Aberrant HMGA2 expression is associated, for example, with abnormal body stature, diabetes mellitus, heart development and uterine leiomyomas. Furthermore, the protein is re-expressed in many primary tumor cells and plays an important role in metastasis. Here we used iPSC formation in conjunction with exogenous human HMGA2 expression to gain insight into biological functions of HMGA2. Gene expression profiling and gene ontology analyses showed that anatomical development and cell adhesion/differentiation processes are strongly affected by HMGA2. This could help to uncover, at the molecular level, some of the known phenotypic consequences of aberrant HMGA2 expression. Furthermore, our data showed that expression of key diabetes susceptibility genes is influenced by HMGA2, which revealed an interesting link to the recently indentified Lin28/let-7 pathway regulating mammalian glucose metabolism. Contrary to a previous report, our results indicate that HMGA2 is not involved in the regulation of telomerase gene expression. Finally, our data support a model in which tight regulation of intracellular HMGA2 levels is important both to maintain a pluripotent ESC state and to induce differentiation into certain cell lineages during later developmental stages.
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93
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Hombach-Klonisch S, Natarajan S, Thanasupawat T, Medapati M, Pathak A, Ghavami S, Klonisch T. Mechanisms of therapeutic resistance in cancer (stem) cells with emphasis on thyroid cancer cells. Front Endocrinol (Lausanne) 2014; 5:37. [PMID: 24723911 PMCID: PMC3971176 DOI: 10.3389/fendo.2014.00037] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Accepted: 03/11/2014] [Indexed: 12/11/2022] Open
Abstract
The two main reasons for death of cancer patients, tumor recurrence and metastasis, are multi-stage cellular processes that involve increased cell plasticity and coincide with elevated resistance to anti-cancer treatments. Epithelial-to-mesenchymal transition (EMT) is a key contributor to metastasis in many cancer types, including thyroid cancer and is known to confer stem cell-like properties onto cancer cells. This review provides an overview of molecular mechanisms and factors known to contribute to cancer cell plasticity and capable of enhancing cancer cell resistance to radio- and chemotherapy. We elucidate the role of DNA repair mechanisms in contributing to therapeutic resistance, with a special emphasis on thyroid cancer. Next, we explore the emerging roles of autophagy and damage-associated molecular pattern responses in EMT and chemoresistance in tumor cells. Finally, we demonstrate how cancer cells, including thyroid cancer cells, can highjack the oncofetal nucleoprotein high-mobility group A2 to gain increased transformative cell plasticity, prevent apoptosis, and enhance metastasis of chemoresistant tumor cells.
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Affiliation(s)
- Sabine Hombach-Klonisch
- Department of Human Anatomy and Cell Science, University of Manitoba, Winnipeg, MB, Canada
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of Manitoba, Winnipeg, MB, Canada
| | - Suchitra Natarajan
- Department of Human Anatomy and Cell Science, University of Manitoba, Winnipeg, MB, Canada
| | | | - Manoj Medapati
- Department of Human Anatomy and Cell Science, University of Manitoba, Winnipeg, MB, Canada
| | - Alok Pathak
- Department of Human Anatomy and Cell Science, University of Manitoba, Winnipeg, MB, Canada
- Department of Surgery, University of Manitoba, Winnipeg, MB, Canada
| | - Saeid Ghavami
- Department of Human Anatomy and Cell Science, University of Manitoba, Winnipeg, MB, Canada
- Manitoba Institute of Child Health, University of Manitoba, Winnipeg, MB, Canada
| | - Thomas Klonisch
- Department of Human Anatomy and Cell Science, University of Manitoba, Winnipeg, MB, Canada
- Department of Surgery, University of Manitoba, Winnipeg, MB, Canada
- Manitoba Institute of Child Health, University of Manitoba, Winnipeg, MB, Canada
- Department of Medical Microbiology and Infectious Diseases, University of Manitoba, Winnipeg, MB, Canada
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94
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Ozturk N, Singh I, Mehta A, Braun T, Barreto G. HMGA proteins as modulators of chromatin structure during transcriptional activation. Front Cell Dev Biol 2014; 2:5. [PMID: 25364713 PMCID: PMC4207033 DOI: 10.3389/fcell.2014.00005] [Citation(s) in RCA: 105] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Accepted: 02/07/2014] [Indexed: 01/12/2023] Open
Abstract
High mobility group (HMG) proteins are the most abundant non-histone chromatin associated proteins. HMG proteins bind to DNA and nucleosome and alter the structure of chromatin locally and globally. Accessibility to DNA within chromatin is a central factor that affects DNA-dependent nuclear processes, such as transcription, replication, recombination, and repair. HMG proteins associate with different multi-protein complexes to regulate these processes by mediating accessibility to DNA. HMG proteins can be subdivided into three families: HMGA, HMGB, and HMGN. In this review, we will focus on recent advances in understanding the function of HMGA family members, specifically their role in gene transcription regulation during development and cancer.
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Affiliation(s)
- Nihan Ozturk
- LOEWE Research Group Lung Cancer Epigenetic, Max-Planck-Institute for Heart and Lung Research Bad Nauheim, Germany
| | - Indrabahadur Singh
- LOEWE Research Group Lung Cancer Epigenetic, Max-Planck-Institute for Heart and Lung Research Bad Nauheim, Germany
| | - Aditi Mehta
- LOEWE Research Group Lung Cancer Epigenetic, Max-Planck-Institute for Heart and Lung Research Bad Nauheim, Germany
| | - Thomas Braun
- Department of Cardiac Development and Remodeling, Max-Planck-Institute for Heart and Lung Research Bad Nauheim, Germany
| | - Guillermo Barreto
- LOEWE Research Group Lung Cancer Epigenetic, Max-Planck-Institute for Heart and Lung Research Bad Nauheim, Germany
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95
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Reexpression of Let-7g microRNA inhibits the proliferation and migration via K-Ras/HMGA2/snail axis in hepatocellular carcinoma. BIOMED RESEARCH INTERNATIONAL 2014; 2014:742417. [PMID: 24724096 PMCID: PMC3960551 DOI: 10.1155/2014/742417] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/09/2013] [Revised: 01/16/2014] [Accepted: 01/26/2014] [Indexed: 01/26/2023]
Abstract
Let-7 family microRNAs have been reported to be downregulated in human hepatocellular carcinoma in comparison with normal hepatic tissues. Among them, let-7g was identified as the lowest expression using real-time RT-PCR. However, the mechanism by which let-7g works in hepatocellular carcinoma remains unknown. Here, in our present study, we have had let-7g reexpressed in vitro in hepatocellular carcinoma cell lines MHCC97-H and HCCLM3 via transfection. The proliferation after reexpression of let-7g was assayed using MTT method; the migration and invasion after restoration were detected by wound-healing and Transwell assay, respectively. We found using Western-blotting that let-7g can regulate epithelial-mesenchymal transition (EMT) by downregulating K-Ras and HMGA2A after reexpresssion. Xenografted nude mice were used to observe whether or not reexpression of let-7g could have potential therapeutic ability. In vivo, to observe the association with let-7g expression and overall prognosis, 40 paired cases of hepatocellular carcinoma were analyzed using in situ hybridization (ISH). It was found that reexpression of let-7g can inhibit the proliferation, migration, and invasion significantly, and that low expression of let-7g was significantly associated with poorer overall survival. Taken together, let-7g could be used as a promising therapeutic agent in vivo in the treatment of hepatocellular carcinoma at the earlier stage.
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Li HX, Lu ZH, Shen K, Cheng WJ, Malpica A, Zhang J, Wei JJ, Zhang ZH, Liu J. Advances in serous tubal intraepithelial carcinoma: correlation with high grade serous carcinoma and ovarian carcinogenesis. INTERNATIONAL JOURNAL OF CLINICAL AND EXPERIMENTAL PATHOLOGY 2014; 7:848-57. [PMID: 24696706 PMCID: PMC3971287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Received: 12/29/2013] [Accepted: 01/23/2014] [Indexed: 06/03/2023]
Abstract
Early serous carcinoma in fallopian tube or serous tubal intraepithelial carcinoma (STIC), an early lesion limited to the epithelium of the fallopian tube and firstly identified from specimen obtained by prophylactic salpingo-oophorectomy, has provided insight into pelvic high grade serous carcinoma (HGSC). Increasing evidence indicates that STIC is a likely precursor for HGSC and several studies have focused on this lesion and its clinical significance. This review addresses recent advances in recognizing STIC and its correlation with HGSC and ovarian carcinogenesis. It also describes evidence regarding the fallopian tube as a source of some HGSCs, the protocol for optimizing histological evaluation of the tubes, the spectrum of tubal lesions from benign to noninvasive carcinoma, changes in diagnostic criteria from purely morphologic characteristics to a combination of morphologic features and molecular biomarkers, and new studies about potential biomarkers. However, the direct evidence regarding STIC as the precursor of HGSC is still tantalizing due to other possibilities that may also explain the origin of pelvic HGSC. Further molecular genetic studies are required to address this important question.
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Affiliation(s)
- Hong-Xia Li
- Department of Pathology, The First Affiliated Hospital of Nanjing Medical UniversityNanjing, Jiangsu, P. R. China
- Department of Pathology, The University of Texas MD Anderson Cancer CenterHouston, TX, USA
| | - Zhao-Hui Lu
- Department of Pathology, The University of Texas MD Anderson Cancer CenterHouston, TX, USA
- Department of Pathology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing, P. R. China
| | - Keng Shen
- Department of Obstetric and Gynecology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing, P. R. China
| | - Wen-Jun Cheng
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Nanjing Medical UniversityNanjing, Jiangsu, P. R. China
| | - Anais Malpica
- Department of Pathology, The University of Texas MD Anderson Cancer CenterHouston, TX, USA
| | - Jing Zhang
- Department of Pathology, Forth Military Medical UniversityXi’an, Shanaxi, P. R. China
| | - Jian-Jun Wei
- Department of Pathology, Feinberg School of Medicine, Northwestern UniversityChicago, IL, USA
| | - Zhi-Hong Zhang
- Department of Pathology, The First Affiliated Hospital of Nanjing Medical UniversityNanjing, Jiangsu, P. R. China
| | - Jinsong Liu
- Department of Pathology, The First Affiliated Hospital of Nanjing Medical UniversityNanjing, Jiangsu, P. R. China
- Department of Pathology, The University of Texas MD Anderson Cancer CenterHouston, TX, USA
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Lu Y, Lu J, Li X, Zhu H, Fan X, Zhu S, Wang Y, Guo Q, Wang L, Huang Y, Zhu M, Wang Z. MiR-200a inhibits epithelial-mesenchymal transition of pancreatic cancer stem cell. BMC Cancer 2014; 14:85. [PMID: 24521357 PMCID: PMC3923443 DOI: 10.1186/1471-2407-14-85] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2013] [Accepted: 01/27/2014] [Indexed: 12/24/2022] Open
Abstract
Background Pancreatic cancer is one of the most aggressive cancers, and the aggressiveness of pancreatic cancer is in part due to its intrinsic and extrinsic drug resistance characteristics, which are also associated with the acquisition of epithelial-to-mesenchymal transition (EMT). Increasing evidence suggests that EMT-type cells share many biological characteristics with cancer stem-like cells. And miR-200 has been identified as a powerful regulator of EMT. Methods Cancer Stem Cells (CSCs) of human pancreatic cancer cell line PANC-1 were processed for CD24, CD44 and ESA multi-colorstaining, and sorted out on a BD FACS Aria II machine. RT-qPCR was performed using the miScript PCR Kit to assay the expression of miR-200 family. In order to find the role of miR-200a in the process of EMT, miR-200a mimic was transfected to CSCs. Results Pancreatic cancer cells with EMT phenotype displayed stem-like cell features characterized by the expression of cell surface markers CD24, CD44 and epithelial-specific antigen (ESA), which was associated with decreased expression of miR-200a. Moreover, overexpression of miR-200a was resulted in down-regulation of N-cadherin, ZEB1 and vimentin, but up-regulation of E-cadherin. In addition, miR-200a overexpression inhibited cell migration and invasion in CSCs. Conclusion In our study, we found that miR-200a played an important role in linking the characteristics of cancer stem-like cells with EMT-like cell signatures in pancreatic cancer. Selective elimination of cancer stem-like cells by reversing the EMT phenotype to mesenchymal-to-epithelial transition (MET) phenotype using novel agents would be useful for prevention and/or treatment of pancreatic cancer.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Mingyan Zhu
- Department of General Surgery, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province 226001, P, R, China.
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Macha MA, Seshacharyulu P, Krishn SR, Pai P, Rachagani S, Jain M, Batra SK. MicroRNAs (miRNAs) as biomarker(s) for prognosis and diagnosis of gastrointestinal (GI) cancers. Curr Pharm Des 2014; 20:5287-97. [PMID: 24479799 DOI: 10.2174/1381612820666140128213117] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2013] [Accepted: 03/12/2014] [Indexed: 12/19/2022]
Abstract
Gastrointestinal (GI) cancers remain one of the most common malignancies and are the second common cause of cancer deaths worldwide. The limited effectiveness of therapy for patients with advanced stage and recurrent disease is a reflection of an incomplete understanding of the molecular basis of GI carcinogenesis. Major advancements have improved our understanding of pathology and pathogenesis of GI cancers, but high mortality rates, unfavorable prognosis and lack of clinical predictive biomarkers provide an impetus to investigate new sensitive and specific diagnostic and prognostic markers for GI cancers. MicroRNAs (miRNAs) are short (19-24 nucleotides) noncoding RNA molecules that regulate gene expression at the posttranscriptional level thus playing an important role in modulating various biological processes including, but not limited to developmental processes, proliferation, apoptosis, metabolism, differentiation, epithelial-mechenchymal transition and are involved in the initiation and progression of various human cancers. Unique miRNA expression profiles have been observed in various cancer types at different stages, suggesting their potential as diagnostic and prognostic biomarkers. Due to their tumor-specific and tissue-specific expression profiles, stability, robust clinical assays for detection in serum as well as in formalin-fixed tissue samples, miRNAs have emerged as attractive candidates for diagnostic and prognostic applications. This review summarizes recent research supporting the utility of miRNAs as novel diagnostic and prognostic tools for GI cancers.
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Affiliation(s)
| | | | | | | | | | | | - Surinder K Batra
- Department of Biochemistry and Molecular Biology, Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, Nebraska, 68198-5870, USA
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Zhang K, Gao H, Wu X, Wang J, Zhou W, Sun G, Wang J, Wang Y, Mu B, Kim C, Chu P, Ho DM, Ann DK, Wong TT, Yen Y. Frequent overexpression of HMGA2 in human atypical teratoid/rhabdoid tumor and its correlation with let-7a3/let-7b miRNA. Clin Cancer Res 2014; 20:1179-89. [PMID: 24423609 DOI: 10.1158/1078-0432.ccr-13-1452] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE Atypical teratoid/rhabdoid tumors (AT/RT) are highly aggressive pediatric malignancies characterized by biallelic inactivation of the SMARCB1 tumor suppressor gene. We searched for novel genomic aberrations by investigating the copy number and expression alterations of let-7a3/let-7b microRNA (miRNA) and correlated these with expression of high-mobility group AT-hook 2 (HMGA2) oncoprotein, a target of let-7 miRNA family, in 18 AT/RT samples to elucidate potential roles of HMGA2 in the pathogenesis of AT/RT. EXPERIMENTAL DESIGN Genomic aberrations, let-7a3/let-7b miRNA and HMGA2 expression in AT/RT tissues were identified using quantitative PCR, reverse transcription PCR (RT-PCR), and immunohistochemistry. The impact of let-7b miRNA on HMGA2 expression and the malignant potential of human rhabdoid tumor cell G401 (SMARCB1(-/-)) were investigated by antisense inhibition and ectopic overexpression studies. RESULTS The copy number of let-7a3/let-7b miRNA was substantially decreased in 4 of 11 AT/RT samples. A significantly inverse correlation between let-7a3/let-7b miRNA expression and HMGA2 mRNA expression was observed in AT/RT tissues (R = -0.34; P < 0.05). Immunohistochemistry analysis demonstrated that HMGA2 was highly overexpressed in 83.3% (15 of 18) of AT/RT tissues. Restoration of let-7 miRNA or knockdown of HMGA2 expression significantly suppressed proliferation and colony formation, and almost abolished the invasive potential of G401 cells. CONCLUSION Reduction of let-7a3/let-7b miRNA may be one of mechanisms leading to overexpression of HMGA2 in AT/RT tissues. HMGA2 oncoprotein plays critical roles in the pathogenesis of AT/RT development; and reconstitution of let-7 miRNA or knockdown of HMGA2 oncoprotein may provide a novel therapeutic strategy for the treatment of patients with AT/RT.
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Affiliation(s)
- Keqiang Zhang
- Authors' Affiliations: Department of Molecular Pharmacology; Solexa Core Lab; Division of Information Sciences, Department of Molecular Medicine; Department of Pathology; Translational Research Laboratory, Beckman Research Institute, City of Hope National Medical Center, Duarte, California; Department of Pathology and Laboratory Medicine, Taipei Veterans General Hospital; Pediatric Neurosurgery, Department of Surgery, Cheng Hsin General Hospital; and Taipei Medical University, Taipei, Taiwan
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A mitochondrial thioredoxin-sensitive mechanism regulates TGF-β-mediated gene expression associated with epithelial–mesenchymal transition. Biochem Biophys Res Commun 2014; 443:821-7. [DOI: 10.1016/j.bbrc.2013.12.050] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2013] [Accepted: 12/09/2013] [Indexed: 12/28/2022]
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