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Song Y, Lian S, Fan H, Ma C, Zheng L, Huang F, Huang S, Tang Y, Shi A, Shu L, Zhao L, Xu Y, Guo S, Liu Z, Zhang Z. Bmi1 facilitates the progression of cholangiocarcinoma by inhibiting Foxn2 expression dependent on a histone H2A ubiquitination manner. Cancer Lett 2024; 592:216921. [PMID: 38705565 DOI: 10.1016/j.canlet.2024.216921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Revised: 04/16/2024] [Accepted: 04/27/2024] [Indexed: 05/07/2024]
Abstract
Cholangiocarcinoma (CCA), an exceptionally aggressive malignancy originating from the epithelium of the bile duct, poses a formidable challenge in cancer research and clinical management. Currently, attention is focused on exploring the oncogenic role and prognostic implications associated with Bmi1 in the context of CCA. In our study, we assessed the correlation of Bmi1 and Foxn2 expression across all types of CCA and evaluated their prognostic significance. Our results demonstrated that Bmi1 exhibits significantly upregulated expression in CCA tissues, while Foxn2 expression shows an inverse pattern. Simultaneously, the high expression of Bmi1, coupled with the low expression of Foxn2, indicates an unfavorable prognosis. Through in vitro and in vivo experiments, we confirmed the crucial role of Foxn2 in the proliferation, metastasis, and epithelial-mesenchymal transition (EMT) of CCA. Mechanistically, Bmi1 promotes the ubiquitination of histone H2A (H2AUb), leading to chromatin opening attenuation and a decrease in Foxn2 expression, ultimately driving CCA progression. Additionally, we described the potential value of Bmi1 and H2AUb inhibitors in treating CCA through in vitro experiments and orthotopic models. This study is of significant importance in deepening our understanding of the interaction between Bmi1 and Foxn2 in CCA and has the potential to advance the development of precision therapies for CCA.
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Affiliation(s)
- Yan Song
- Department of General Surgery, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Shuo Lian
- Department of General Surgery, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Huikang Fan
- Department of General Surgery, Qilu Hospital (Qingdao), Cheeloo College of Medicine, Shandong University, Qingdao, Shandong, 266035, China
| | - Changlin Ma
- Department of Hepatobiliary Surgery, Jining First People's Hospital, Jining, Shandong, 272002, China
| | - Lijie Zheng
- Department of General Surgery, Qilu Hospital (Qingdao), Cheeloo College of Medicine, Shandong University, Qingdao, Shandong, 266035, China
| | - Fan Huang
- Department of General Surgery, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Shaohui Huang
- Department of General Surgery, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Yongchang Tang
- Department of General Surgery, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Anda Shi
- Department of General Surgery, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Lizhuang Shu
- Department of General Surgery, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Liming Zhao
- Department of General Surgery, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Yunfei Xu
- Department of General Surgery, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Sen Guo
- Department of General Surgery, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China.
| | - Zengli Liu
- Department of General Surgery, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China; Department of General Surgery, Qilu Hospital (Qingdao), Cheeloo College of Medicine, Shandong University, Qingdao, Shandong, 266035, China.
| | - Zongli Zhang
- Department of General Surgery, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China.
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Liu Z, Hu C, Zheng L, Liu J, Li K, Li X, Wang Y, Mu W, Chen T, Shi A, Qiu B, Zhang X, Zhang Z, Xu Y. BMI1 promotes cholangiocarcinoma progression and correlates with antitumor immunity in an exosome-dependent manner. Cell Mol Life Sci 2022; 79:469. [PMID: 35932322 PMCID: PMC11071914 DOI: 10.1007/s00018-022-04500-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Revised: 07/04/2022] [Accepted: 07/18/2022] [Indexed: 11/24/2022]
Abstract
BACKGROUND Cholangiocarcinoma (CCA) is a class of malignant tumors originating from bile duct epithelial cells. Due to difficult early diagnosis and limited treatment, the prognosis of CCA is extremely poor. BMI1 is dysregulated in many human malignancies. However, the prognostic significance and oncogenic role of BMI1 in cholangiocarcinoma (CCA) are not well elucidated. METHODS In the present study, we investigated its clinical importance and the potential mechanisms in the progression of CCA. We detected BMI1 expression in a large CCA cohort. We demonstrated that BMI1 was substantially upregulated in CCA tissues and was identified as an independent prognostic biomarker of CCA. Moreover, overexpression of BMI1 promoted CCA proliferation, migration, and invasion. And BMI1 knockdown could inhibit proliferation and metastases of CCA in vitro and in vitro/vivo validation. Interestingly, we found that CCA-derived exosomes contain BMI1 proteins, which can transfer BMI1 between CCA cells. The unique BMI1-containing exosomes promote CCA proliferation and metastasis through autocrine/paracrine mechanisms. In addition, we demonstrated that BMI1 inhibits CD8+T cell-recruiting chemokines by promoting repressive H2A ubiquitination in CCA cells. CONCLUSIONS BMI1 is an unfavorable prognostic biomarker of CCA. Our data depict a novel function of BMI1 in CCA tumorigenesis and metastasis mediated by exosomes. Besides, BMI1 inhibition may augment immune checkpoint blockade to inhibit tumor progression by activating cell-intrinsic immunity of CCA.
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Affiliation(s)
- Zengli Liu
- Department of General Surgery, Qilu Hospital, Cheeloo College of Medicine, Shandong University, 107 Wenhuaxi Road, Jinan, 250012, Shandong, China
| | - Chunxiao Hu
- Department of General Surgery, Qilu Hospital, Cheeloo College of Medicine, Shandong University, 107 Wenhuaxi Road, Jinan, 250012, Shandong, China
| | - Lijie Zheng
- Department of General Surgery, Qilu Hospital, Cheeloo College of Medicine, Shandong University, 107 Wenhuaxi Road, Jinan, 250012, Shandong, China
| | - Jialiang Liu
- Department of General Surgery, Qilu Hospital, Cheeloo College of Medicine, Shandong University, 107 Wenhuaxi Road, Jinan, 250012, Shandong, China
| | - Kangshuai Li
- Department of General Surgery, Qilu Hospital, Cheeloo College of Medicine, Shandong University, 107 Wenhuaxi Road, Jinan, 250012, Shandong, China
| | - Xingyong Li
- Department of General Surgery, Qilu Hospital, Cheeloo College of Medicine, Shandong University, 107 Wenhuaxi Road, Jinan, 250012, Shandong, China
- Department of Hepatobiliary Surgery, Shandong Provincial Third Hospital, Cheeloo College of Medicine, Shandong University, 11 Wuyingshan Middle Road, Jinan, 250031, Shandong, China
| | - Yue Wang
- Department of General Surgery, Qilu Hospital, Cheeloo College of Medicine, Shandong University, 107 Wenhuaxi Road, Jinan, 250012, Shandong, China
| | - Wentao Mu
- Department of General Surgery, Qilu Hospital, Cheeloo College of Medicine, Shandong University, 107 Wenhuaxi Road, Jinan, 250012, Shandong, China
| | - Tianli Chen
- Department of General Surgery, Qilu Hospital, Cheeloo College of Medicine, Shandong University, 107 Wenhuaxi Road, Jinan, 250012, Shandong, China
| | - Anda Shi
- Department of General Surgery, Qilu Hospital, Cheeloo College of Medicine, Shandong University, 107 Wenhuaxi Road, Jinan, 250012, Shandong, China
| | - Bo Qiu
- Department of General Surgery, Qilu Hospital, Cheeloo College of Medicine, Shandong University, 107 Wenhuaxi Road, Jinan, 250012, Shandong, China
| | - Xin Zhang
- Department of Clinical Laboratory, Qilu Hospital, Cheeloo College of Medicine, Shandong University, 107 Wenhuaxi Road, Jinan, 250012, Shandong, China
| | - Zongli Zhang
- Department of General Surgery, Qilu Hospital, Cheeloo College of Medicine, Shandong University, 107 Wenhuaxi Road, Jinan, 250012, Shandong, China.
| | - Yunfei Xu
- Department of General Surgery, Qilu Hospital, Cheeloo College of Medicine, Shandong University, 107 Wenhuaxi Road, Jinan, 250012, Shandong, China.
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3
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Guo J, Deng N, Xu Y, Li L, Kuang D, Li M, Li X, Xu Z, Xiang M, Xu C. Bmi1 drives the formation and development of intrahepatic cholangiocarcinoma independent of Ink4A/Arf repression. Pharmacol Res 2021; 164:105365. [PMID: 33307220 DOI: 10.1016/j.phrs.2020.105365] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 11/29/2020] [Accepted: 11/30/2020] [Indexed: 12/23/2022]
Abstract
Hepatocellular carcinoma (HCC) and intrahepatic cholangiocarcinoma (ICC) are the most prevalent types of primary liver cancer. Compared with HCC, for which several drugs have been approved, ICC is associated with shorter survival, and no drug has been approved for this type. Previously, we reported that Bmi1 drives HCC and is required for HCC development and growth. However, whether Bmi1 plays a critical role in ICC is not clear, although it reportedly is highly expressed in ICC. Therefore, we investigated its role in ICC. Here, we report that Bmi1 promotes ICC initiation and progression independent of the Ink4A/Arf pathway, a canonical downstream pathway of Bmi1. We found that Bmi1 is overexpressed in human ICC. Co-expression of Bmi1 and NRas induced ICC formation in mice. Knockdown or inactivation of Bmi1 inhibited ICC growth in vitro. Liver-specific knockout or inactivation of Bmi1 remarkably suppressed ICC tumor formation and development in vivo. Mechanistically, no correlation between Bmi1 and Ink4A/Arf levels was found in mouse and human ICC tissues. Together, our data indicate that Bmi1 functions as an oncogene independent of repression of the Ink4A/Arf locus in ICC and that it can serve as a target for ICC treatment.
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Affiliation(s)
- Jun Guo
- School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Nan Deng
- School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Yong Xu
- School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Lei Li
- School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Dong Kuang
- Department of Pathology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Min Li
- Department of Hepatobiliary Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022. China
| | - Xiaolei Li
- Department of Thyroid and Breast Surgery, The 960th Hospital of the PLA, Jinan, 250031, China
| | - Zhong Xu
- Department of Infectious Diseases, Guizhou Provincial People's Hospital, Guiyang, 550002, China
| | - Ming Xiang
- School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China.
| | - Chuanrui Xu
- School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China.
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4
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Li H, Long J, Xie F, Kang K, Shi Y, Xu W, Wu X, Lin J, Xu H, Du S, Xu Y, Zhao H, Zheng Y, Gu J. Transcriptomic analysis and identification of prognostic biomarkers in cholangiocarcinoma. Oncol Rep 2019; 42:1833-1842. [PMID: 31545466 PMCID: PMC6787946 DOI: 10.3892/or.2019.7318] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Accepted: 08/20/2019] [Indexed: 12/27/2022] Open
Abstract
Cholangiocarcinoma (CCA) is acknowledged as the second most commonly diagnosed primary liver tumor and is associated with a poor patient prognosis. The present study aimed to explore the biological functions, signaling pathways and potential prognostic biomarkers involved in CCA through transcriptomic analysis. Based on the transcriptomic dataset of CCA from The Cancer Genome Atlas (TCGA), differentially expressed protein-coding genes (DEGs) were identified. Biological function enrichment analysis, including Gene Ontology (GO) analysis and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analysis, was applied. Through protein-protein interaction (PPI) network analysis, hub genes were identified and further verified using open-access datasets and qRT-PCR. Finally, a survival analysis was conducted. A total of 1,463 DEGs were distinguished, including 267 upregulated genes and 1,196 downregulated genes. For the GO analysis, the upregulated DEGs were enriched in ‘cadherin binding in cell-cell adhesion’, ‘extracellular matrix (ECM) organization’ and ‘cell-cell adherens junctions’. Correspondingly, the downregulated DEGs were enriched in the ‘oxidation-reduction process’, ‘extracellular exosomes’ and ‘blood microparticles’. In regards to the KEGG pathway analysis, the upregulated DEGs were enriched in ‘ECM-receptor interactions’, ‘focal adhesions’ and ‘small cell lung cancer’. The downregulated DEGs were enriched in ‘metabolic pathways’, ‘complement and coagulation cascades’ and ‘biosynthesis of antibiotics’. The PPI network suggested that CDK1 and another 20 genes were hub genes. Furthermore, survival analysis suggested that CDK1, MKI67, TOP2A and PRC1 were significantly associated with patient prognosis. These results enhance the current understanding of CCA development and provide new insight into distinguishing candidate biomarkers for predicting the prognosis of CCA.
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Affiliation(s)
- Hanyu Li
- Department of Liver Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, P.R. China
| | - Junyu Long
- Department of Liver Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, P.R. China
| | - Fucun Xie
- Department of Liver Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, P.R. China
| | - Kai Kang
- Department of Liver Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, P.R. China
| | - Yue Shi
- Department of Liver Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, P.R. China
| | - Weiyu Xu
- Department of Liver Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, P.R. China
| | - Xiaoqian Wu
- Department of Liver Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, P.R. China
| | - Jianzhen Lin
- Department of Liver Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, P.R. China
| | - Haifeng Xu
- Department of Liver Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, P.R. China
| | - Shunda Du
- Department of Liver Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, P.R. China
| | - Yiyao Xu
- Department of Liver Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, P.R. China
| | - Haitao Zhao
- Department of Liver Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, P.R. China
| | - Yongchang Zheng
- Department of Liver Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, P.R. China
| | - Jin Gu
- MOE Key Laboratory of Bioinformatics, BNIRST Bioinformatics Division, Department of Automation, Tsinghua University, Beijing 100084, P.R. China
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5
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Li J, Jiang X, Li C, Liu Y, Kang P, Zhong X, Cui Y. LncRNA-MEG3 inhibits cell proliferation and invasion by modulating Bmi1/RNF2 in cholangiocarcinoma. J Cell Physiol 2019; 234:22947-22959. [PMID: 31119760 DOI: 10.1002/jcp.28856] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Revised: 05/05/2019] [Accepted: 05/07/2019] [Indexed: 12/15/2022]
Abstract
Cholangiocarcinoma (CCA) is a mortal cancer with gradually increasing incidences all over the world, whereas effective diagnosis and treatment for this disease are still lacking. As a classical long noncoding RNA (lncRNA), maternally expressed gene 3 (MEG3) has been reported to exhibit pivotal regulatory roles in the occurrence and development of various digestive system tumors. Nevertheless, the clinical relevance and biological function of MEG3 in CCA remain largely unclear. In this study, MEG3 expression was significantly downregulated in both CCA tissues and cells in comparison with that in nontumor controls, respectively, and this downexpression was prominently associated with advanced TNM stage, lymph node invasion, and poor survival. Moreover, decreased MEG3 was an independent forecaster of poor prognosis for CCA patients. Functionally, MEG3 overexpression inhibited CCA growth in vitro and in vivo. Enhanced MEG3 also suppressed migration and invasion of CCLP-1 and QBC939 cells by reversing epithelial-mesenchymal transition (EMT) process. On the contrary, the proliferation, metastasis, and EMT were facilitated via knocking down MEG3. In addition, the expression of B lymphoma Mo-MLV insertion region 1 (Bmi1) and RING finger protein 2 was impacted by gain or loss of MEG3, furthermore, the malignant processes induced by MEG3 knockdown were rescued by means of silencing Bmi1. These data suggested that MEG3 caused tumor suppressive effects partly through mediating polycomb repressive complex 1. Our findings elucidate that MEG3 exerts critical functions in CCA development and likely acts as a promising tumor indicator or intervention target for CCA.
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Affiliation(s)
- Jinglin Li
- Department of HPB Surgery, The 2nd Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
| | - Xingming Jiang
- Department of HPB Surgery, The 2nd Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
| | - Chunlong Li
- Department of HPB Surgery, The 2nd Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
| | - Yueping Liu
- Department of HPB Surgery, The 2nd Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
| | - Pengcheng Kang
- Department of HPB Surgery, The 2nd Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
| | - Xiangyu Zhong
- Department of HPB Surgery, The 2nd Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
| | - Yunfu Cui
- Department of HPB Surgery, The 2nd Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
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Neureiter D, Kiesslich T, Ritter M, Mayr C. Update on the role and therapeutic potential of polycomb repressive complexes in (biliary tract) cancer. Expert Opin Ther Targets 2017; 22:1-3. [PMID: 29148857 DOI: 10.1080/14728222.2018.1406923] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Daniel Neureiter
- a Institute of Pathology , Paracelsus Medical University/Salzburger Landeskliniken , Salzburg , Austria
| | - Tobias Kiesslich
- b Department of Internal Medicine I, Paracelsus Medical University/Salzburger Landeskliniken and Laboratory for Tumour Biology and Experimental Therapies, Institute of Physiology and Pathophysiology , Paracelsus Medical University , Salzburg , Austria
| | - Markus Ritter
- c Laboratory for Tumour Biology and Experimental Therapies & Laboratory for Functional and Molecular Membrane Physiology, Institute for Physiology and Pathophysiology , Paracelsus Medical University , Salzburg , Austria.,d Department for Radon Therapy Research , Ludwig Boltzmann Cluster for Arthritis and Rehabilitation , Salzburg , Austria
| | - Christian Mayr
- b Department of Internal Medicine I, Paracelsus Medical University/Salzburger Landeskliniken and Laboratory for Tumour Biology and Experimental Therapies, Institute of Physiology and Pathophysiology , Paracelsus Medical University , Salzburg , Austria
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Verlingue L, Hollebecque A, Boige V, Ducreux M, Malka D, Ferté C. Matching genomic molecular aberrations with molecular targeted agents: Are biliary tract cancers an ideal playground? Eur J Cancer 2017. [DOI: 10.1016/j.ejca.2017.05.006] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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8
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Mayr C, Ocker M, Ritter M, Pichler M, Neureiter D, Kiesslich T. Biliary tract cancer stem cells - translational options and challenges. World J Gastroenterol 2017; 23:2470-2482. [PMID: 28465631 PMCID: PMC5394510 DOI: 10.3748/wjg.v23.i14.2470] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Revised: 02/27/2017] [Accepted: 03/21/2017] [Indexed: 02/06/2023] Open
Abstract
Management of biliary tract cancer remains challenging. Tumors show high recurrence rates and therapeutic resistance, leading to dismal prognosis and short survival. The cancer stem cell model states that a tumor is a heterogeneous conglomerate of cells, in which a certain subpopulation of cells - the cancer stem cells - possesses stem cell properties. Cancer stem cells have high clinical relevance due to their potential contributions to development, progression and aggressiveness as well as recurrence and metastasis of malignant tumors. Consequently, reliable identification of as well as pharmacological intervention with cancer stem cells is an intensively investigated and promising research field. The involvement of cancer stem cells in biliary tract cancer is likely as a number of studies demonstrated their existence and the obvious clinical relevance of several established cancer stem cell markers in biliary tract cancer models and tissues. In the present article, we review and discuss the currently available literature addressing the role of putative cancer stem cells in biliary tract cancer as well as the connection between known contributors of biliary tract tumorigenesis such as oncogenic signaling pathways, micro-RNAs and the tumor microenvironment with cancer stem cells.
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Mayr C, Wagner A, Loeffelberger M, Bruckner D, Jakab M, Berr F, Di Fazio P, Ocker M, Neureiter D, Pichler M, Kiesslich T. The BMI1 inhibitor PTC-209 is a potential compound to halt cellular growth in biliary tract cancer cells. Oncotarget 2016; 7:745-58. [PMID: 26623561 PMCID: PMC4808030 DOI: 10.18632/oncotarget.6378] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Accepted: 11/14/2015] [Indexed: 02/07/2023] Open
Abstract
BMI1 is a core component of the polycomb repressive complex 1 (PRC1) and is up-regulated in biliary tract cancer (BTC), contributing to aggressive clinical features. In this study we investigated the cytotoxic effects of PTC-209, a recently developed inhibitor of BMI1, in BTC cells. PTC-209 reduced overall viability in BTC cell lines in a dose-dependent fashion (0.04 - 20 µM). Treatment with PTC-209 led to slightly enhanced caspase activity and stop of cell proliferation. Cell cycle analysis revealed that PTC-209 caused cell cycle arrest at the G1/S checkpoint. A comprehensive investigation of expression changes of cell cycle-related genes showed that PTC-209 caused significant down-regulation of cell cycle-promoting genes as well as of genes that contribute to DNA synthesis initiation and DNA repair, respectively. This was accompanied by significantly elevated mRNA levels of cell cycle inhibitors. In addition, PTC-209 reduced sphere formation and, in a cell line-dependent manner, aldehyde dehydrogease-1 positive cells. We conclude that PTC-209 might be a promising drug for future in vitro and in vivo studies in BTC.
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Affiliation(s)
- Christian Mayr
- 1 Department of Internal Medicine I, Salzburger Landeskliniken – SALK, Paracelsus Medical University, Salzburg, Austria
- 2 Laboratory for Tumor Biology and Experimental Therapies, Institute of Physiology and Pathophysiology, Paracelsus Medical University, Salzburg, Austria
| | - Andrej Wagner
- 1 Department of Internal Medicine I, Salzburger Landeskliniken – SALK, Paracelsus Medical University, Salzburg, Austria
| | - Magdalena Loeffelberger
- 2 Laboratory for Tumor Biology and Experimental Therapies, Institute of Physiology and Pathophysiology, Paracelsus Medical University, Salzburg, Austria
| | - Daniela Bruckner
- 3 Research Program for Experimental Ophthalmology and Glaucoma Research, University Clinic of Ophthalmology and Optometry, Salzburger Landeskliniken – SALK, Paracelsus Medical University, Salzburg, Austria
| | - Martin Jakab
- 4 Laboratory of Functional and Molecular Membrane Physiology, Institute of Physiology and Pathophysiology, Paracelsus Medical University, Salzburg, Austria
| | - Frieder Berr
- 2 Laboratory for Tumor Biology and Experimental Therapies, Institute of Physiology and Pathophysiology, Paracelsus Medical University, Salzburg, Austria
| | - Pietro Di Fazio
- 5 Department of Visceral, Thoracic and Vascular Surgery, Philipps-University Marburg, Marburg, Germany
| | - Matthias Ocker
- 6 Institute for Surgical Research, Philipps-University Marburg, Marburg, Germany
- 7 Present address: Experimental Medicine Oncology, Bayer Pharma AG, Berlin, Germany
- 8 Present address: Department of Gastroenterology, Campus Benjamin Franklin, Charité University Medicine, Berlin, Germany
| | - Daniel Neureiter
- 9 Institute of Pathology, Salzburger Landeskliniken – SALK, Paracelsus Medical University, Salzburg, Austria
| | - Martin Pichler
- 10 Division of Oncology, Department of Internal Medicine, Medical University of Graz (MUG), Graz, Austria
| | - Tobias Kiesslich
- 1 Department of Internal Medicine I, Salzburger Landeskliniken – SALK, Paracelsus Medical University, Salzburg, Austria
- 2 Laboratory for Tumor Biology and Experimental Therapies, Institute of Physiology and Pathophysiology, Paracelsus Medical University, Salzburg, Austria
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Mayr C, Neureiter D, Wagner A, Pichler M, Kiesslich T. The role of polycomb repressive complexes in biliary tract cancer. Expert Opin Ther Targets 2014; 19:363-75. [PMID: 25424424 DOI: 10.1517/14728222.2014.986460] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
INTRODUCTION Polycomb group proteins are major epigenetic regulators that modify histone tails. They are organized in two multi-protein complexes called polycomb repressive complex (PRC) 1 and 2. Aberrant PRC activity is known to contribute to the development and aggressiveness of many cancers. Biliary tract cancer (BTC) is a rare malignancy associated with high chemoresistance and poor clinical outcome. Here we review the role of the PRC complexes and the effects of RNAi and drug-mediated inhibition of PRC1 and PRC2 in BTC. AREAS COVERED This review gives a short overview of the composition, biochemical functions and oncogenic role of PRC complexes. We then focus on and summarize the results of current studies that address the role of PRC in BTC. Finally, we discuss options and results of therapeutic targeting of PRC in BTC. EXPERT OPINION Pharmacological inhibition of the two PRC complexes seems to be a promising strategy for treatment of BTC. To date, only few studies have addressed the therapeutic effect of PRC inhibition in BTC. Therefore, it will be important to test established PRC inhibitors, such as DZNep, as well as newly developed drugs, for example, PTC209, to gain more insight into the role of the PRC complexes in BTC and potentially to develop new therapeutic strategies.
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Affiliation(s)
- Christian Mayr
- Department of Internal Medicine I, Paracelsus Medical University / Salzburger Landeskliniken and Laboratory for Tumor Biology and Experimental Therapies, Institute of Physiology and Pathophysiology, Paracelsus Medical University , Salzburg , Austria +43 662 4482 2795 ;
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Sato Y, Ojima H, Onaya H, Mori T, Hiraoka N, Kishi Y, Nara S, Esaki M, Shimada K, Kosuge T, Sugihara K, Kanai Y. Histopathological characteristics of hypervascular cholangiocellular carcinoma as an early stage of cholangiocellular carcinoma. Hepatol Res 2014; 44:1119-29. [PMID: 24033892 DOI: 10.1111/hepr.12236] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/09/2012] [Revised: 08/06/2013] [Accepted: 09/02/2013] [Indexed: 01/14/2023]
Abstract
AIM Prognosis of hypervascular cholangiocellular carcinoma (h-CCC) is reportedly better than that of ordinary hypovascular CCC (o-CCC). The aim of this study is to clarify the histopathological characteristics of h-CCC. METHODS On the basis of the findings in the arterial phase of contrast-enhanced computed tomography, 16 cases of mass-forming-type CCC were divided into two groups (h-CCC, n = 8; o-CCC, n = 8). Areas of high (Area H-a) and low (Area H-b) attenuation in h-CCC cases and areas of low attenuation in o-CCC cases (Area O) were delineated. These areas were then evaluated histopathologically to determine the proportion of tumor cells, fibrous stroma, arterial vessel density, and immunohistochemical expression of Vascular endothelial growth factor; angiopoietin-2; cytokeratin 7, CK19, SOX9 and SOX17 genes; epithelial cell adhesion molecule; and the Bmi-1, Ki-67, epithelial membrane antigen and polyclonal carcinoembryonic antigen. RESULTS The areal ratio of tumor cells decreased and that of fibrous stroma increased in the following order: Area H-a, Area H-b and Area O. Values for AVD and neural cell adhesion molecule positivity rate were significantly higher in Area H-a than in Areas H-b or O. Expressions of vascular endothelial growth factor and angiopoietin-2 were significantly higher in Areas H-a and H-b than in Area O. The Ki-67 labeling index increased in the following order: Area H-a, Area H-b and Area O. CONCLUSION A high areal ratio of tumor cells and AVD as well as a high expression of stem cells and angiogenic markers were observed in cases of h-CCC, whereas the areal ratio of fibrous stroma and malignant potential were low. These results suggest that h-CCC may represent the early stage of CCC.
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Affiliation(s)
- Yuya Sato
- Division of Molecular Pathology, National Cancer Center Research Institute, Tokyo, Japan; Department of Surgical Oncology, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
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Koike H, Ueno Y, Naito T, Shiina T, Nakata S, Ouchi R, Obana Y, Sekine K, Zheng YW, Takebe T, Isono KI, Koseki H, Taniguchi H. Ring1B promotes hepatic stem/progenitor cell expansion through simultaneous suppression of Cdkn1a and Cdkn2a in mice. Hepatology 2014; 60:323-33. [PMID: 24497168 DOI: 10.1002/hep.27046] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2013] [Revised: 01/08/2014] [Accepted: 01/31/2014] [Indexed: 01/08/2023]
Abstract
UNLABELLED Polycomb-group (PcG) proteins play crucial roles in self-renewal of stem cells by suppressing a host of genes through histone modifications. Identification of the downstream genes of PcG proteins is essential for elucidation of the molecular mechanisms of stem cell self-renewal. However, little is known about the PcG target genes in tissue stem cells. We found that the PcG protein, Ring1B, which regulates expression of various genes through monoubiquitination of histone H2AK119, is essential for expansion of hepatic stem/progenitor cells. In mouse embryos with a conditional knockout of Ring1B, we found that the lack of Ring1B inhibited proliferation and differentiation of hepatic stem/progenitor cells and thereby inhibited hepatic organogenesis. These events were characterized by derepression of cyclin-dependent kinase inhibitors (CDKIs) Cdkn1a and Cdkn2a, known negative regulators of cell proliferation. We conducted clonal culture experiments with hepatic stem/progenitor cells to investigate the individual genetic functions of Ring1B, Cdkn1a, and Cdkn2a. The data showed that the cell-cycle inhibition caused by Ring1B depletion was reversed when Cdkn1a and Cdkn2a were suppressed simultaneously, but not when they were suppressed individually. CONCLUSION Our results show that expansion of hepatic stem/progenitor cells requires Ring1B-mediated epigenetic silencing of Cdkn1a and Cdkn2a, demonstrating that Ring1B simultaneously regulates multiple CDKIs in tissue stem/progenitor cells.
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Affiliation(s)
- Hiroyuki Koike
- Department of Regenerative Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Japan
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Pethe P, Nagvenkar P, Bhartiya D. Polycomb group protein expression during differentiation of human embryonic stem cells into pancreatic lineage in vitro. BMC Cell Biol 2014; 15:18. [PMID: 24885493 PMCID: PMC4038052 DOI: 10.1186/1471-2121-15-18] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2013] [Accepted: 05/20/2014] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Polycomb Group (PcG) proteins are chromatin modifiers involved in early embryonic development as well as in proliferation of adult stem cells and cancer cells. PcG proteins form large repressive complexes termed Polycomb Repressive Complexes (PRCs) of which PRC1 and PRC2 are well studied. Differentiation of human Embryonic Stem (hES) cells into insulin producing cells has been achieved to limited extent, but several aspects of differentiation remain unexplored. The PcG protein dynamics in human embryonic stem (hES) cells during differentiation into pancreatic lineage has not yet been reported. In the present study, the expression of RING1A, RING1B, BMI1, CBX2, SUZ12, EZH2, EED and JARID2 during differentiation of hES cells towards pancreatic lineage was examined. RESULTS In-house derived hES cell line KIND1 was used to study expression of PcG protein upon spontaneous and directed differentiation towards pancreatic lineage. qRT-PCR analysis showed expression of gene transcripts for various lineages in spontaneously differentiated KIND1 cells, but no differentiation into pancreatic lineage was observed. Directed differentiation induced KIND1 cells grown under feeder-free conditions to transition from definitive endoderm (Day 4), primitive gut tube stage (Day 8) and pancreatic progenitors (Day 12-Day 16) as evident from expression of SOX17, PDX1 and SOX9 by qRT-PCR and Western blotting. In spontaneously differentiating KIND1 cells, RING1A and SUZ12 were upregulated at day 15, while other PcG transcripts were downregulated. qRT-PCR analysis showed transcripts of RING1B, BMI1, SUZ12, EZH2 and EED were upregulated, while RING1A and CBX2 expression remained low and JARID2 was downregulated during directed differentiation of KIND1 cells. Upregulation of BMI1, EZH2 and SUZ12 during differentiation into pancreatic lineage was also confirmed by Western blotting. Histone modifications such as H3K27 trimethylation and monoubiquitinylation of H2AK119 increased during differentiation into pancreatic lineage as seen by Western blotting. CONCLUSION Our study shows expression of PcG proteins was distinct during spontaneous and directed differentiation. Differentiation into pancreatic lineage was achieved by directed differentiation approach and was associated with increased expression of PcG proteins RING1B, BMI1, EZH2 and SUZ12 accompanied by increase in monoubiquitinylation of H2AK119 and trimethylation of H3K27.
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Affiliation(s)
- Prasad Pethe
- Stem Cell Biology Department, National Institute for Research in Reproductive Health, J.M. Street, Parel-12, Mumbai, India
| | - Punam Nagvenkar
- Stem Cell Biology Department, National Institute for Research in Reproductive Health, J.M. Street, Parel-12, Mumbai, India
| | - Deepa Bhartiya
- Stem Cell Biology Department, National Institute for Research in Reproductive Health, J.M. Street, Parel-12, Mumbai, India
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KEMMERLING RALF, ALINGER BEATE, DIETZE OTTO, BÖSMÜLLER HANSCHRISTIAN, OCKER MATTHIAS, WOLKERSDÖRFER GERNOTW, BERR FRIEDER, NEUREITER DANIEL, KIESSLICH TOBIAS. Association of stem cell marker expression pattern and survival in human biliary tract cancer. Int J Oncol 2012; 41:511-22. [DOI: 10.3892/ijo.2012.1477] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2012] [Accepted: 03/13/2012] [Indexed: 12/21/2022] Open
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Gatto M, Bragazzi MC, Semeraro R, Napoli C, Gentile R, Torrice A, Gaudio E, Alvaro D. Cholangiocarcinoma: update and future perspectives. Dig Liver Dis 2010; 42:253-60. [PMID: 20097142 DOI: 10.1016/j.dld.2009.12.008] [Citation(s) in RCA: 136] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2009] [Accepted: 12/28/2009] [Indexed: 02/07/2023]
Abstract
Cholangiocarcinoma is commonly considered a rare cancer. However, if we consider the hepato-biliary system a single entity, cancers of the gallbladder, intra-hepatic and extra-hepatic biliary tree altogether represent approximately 30% of the total with incidence rates close to that of hepatocellular carcinoma, which is the third most common cause of cancer-related death worldwide. In addition, cholangiocarcinoma is characterized by a very poor prognosis and virtually no response to chemotherapeutics; radical surgery, the only effective treatment, is not frequently applicable because late diagnosis. Biomarkers for screening programs and for follow-up of categories at risk are under investigation, however, currently none of the proposed markers has reached clinical application. For all these considerations, cancers of the biliary tree system should merit much more scientific attention also because a progressive increase in incidence and mortality for these cancers has been reported worldwide. This manuscript deals with the most recent advances in the epidemiology, biology and clinical presentation of cholangiocarcinoma.
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Affiliation(s)
- Manuela Gatto
- Department of Clinical Medicine, Division of Gastroenterology, University of Rome Sapienza, Polo Pontino, R. Rosselini 51, Rome, Italy
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