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Johnson DP, Spitz-Becker GS, Chakraborti K, Bhaskara S. Assessment of epigenetic mechanisms and DNA double-strand break repair using laser micro-irradiation technique developed for hematological cells. EBioMedicine 2019; 43:138-149. [PMID: 31000418 PMCID: PMC6562062 DOI: 10.1016/j.ebiom.2019.03.083] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Revised: 03/18/2019] [Accepted: 03/28/2019] [Indexed: 12/28/2022] Open
Abstract
Background Certain tumors rely heavily on their DNA repair capability to survive the DNA damage induced by chemotherapeutic agents. Therefore, it is important to monitor the dynamics of DNA repair in patient samples during the course of their treatment, in order to determine whether a particular drug regimen perturbs the DNA repair networks in cancer cells and provides therapeutic benefits. Quantitative measurement of proteins and/or their posttranslational modification(s) at DNA double strand breaks (DSBs) induced by laser microirradiation provides an applicable diagnostic approach to examine DNA repair and its dynamics. However, its use is restricted to adherent cell lines and not employed in suspension tumor cells that include the many hematological malignancies. Methods Here, we report the development of an assay to laser micro-irradiate and quantitatively measure DNA repair transactions at DSB sites in normal mononuclear cells and a variety of suspension leukemia and lymphoma cells including primary patient samples. Findings We show that global changes in the H3K27me3-ac switch modulated by inhibitors of Class I HDACs, EZH2 methyltransferase and (or) H3K27me3 demethylases do not reflect the dynamic changes in H3K27me3 that occur at double-strand break sites during DNA repair. Interpretation Results from our mechanistic studies and proof-of-principle data with patient samples together show the effectiveness of using the modified micro-laser-based assay to examine DNA repair directly in suspension cancer cells, and has important clinical implications by serving as a valuable tool to assess drug efficacies in hematological cancer cells that grow in suspension.
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Affiliation(s)
- Danielle P Johnson
- Department of Oncological Sciences, Huntsman Cancer Institute, University of Utah School of Medicine, Salt Lake City, UT, USA
| | - Gabriella S Spitz-Becker
- Department of Radiation Oncology, Huntsman Cancer Institute, University of Utah School of Medicine, Salt Lake City, UT, USA
| | - Korak Chakraborti
- Department of Radiation Oncology, Huntsman Cancer Institute, University of Utah School of Medicine, Salt Lake City, UT, USA
| | - Srividya Bhaskara
- Department of Oncological Sciences, Huntsman Cancer Institute, University of Utah School of Medicine, Salt Lake City, UT, USA; Department of Radiation Oncology, Huntsman Cancer Institute, University of Utah School of Medicine, Salt Lake City, UT, USA.
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Mellini P, Marrocco B, Borovika D, Polletta L, Carnevale I, Saladini S, Stazi G, Zwergel C, Trapencieris P, Ferretti E, Tafani M, Valente S, Mai A. Pyrazole-based inhibitors of enhancer of zeste homologue 2 induce apoptosis and autophagy in cancer cells. Philos Trans R Soc Lond B Biol Sci 2019; 373:rstb.2017.0150. [PMID: 29685965 DOI: 10.1098/rstb.2017.0150] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/11/2017] [Indexed: 12/14/2022] Open
Abstract
Novel pyrazole-based EZH2 inhibitors have been prepared through a molecular pruning approach from known inhibitors bearing a bicyclic moiety as a central scaffold. The hit compound 1o (N-((4,6-dimethyl-2-oxo-1,2-dihydropyridin-3-yl)methyl)-5-methyl-1-phenyl-1H-pyrazole-4-carboxamide) showed low micromolar EZH2/PRC2 inhibition and high selectivity towards a panel of other methyltransferases. Moreover, 1o displayed cell growth arrest in breast MDA-MB231, leukaemia K562, and neuroblastoma SK-N-BE cancer cells joined to reduction of H3K27me3 levels and induction of apoptosis and autophagy.This article is part of a discussion meeting issue 'Frontiers in epigenetic chemical biology'.
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Affiliation(s)
- Paolo Mellini
- Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185 Roma, Italy
| | - Biagina Marrocco
- Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185 Roma, Italy
| | - Diana Borovika
- Department of Organic Chemistry, Latvian Institute of Organic Synthesis, Aizkraukles iela 21, Riga LV-1006, Latvia
| | - Lucia Polletta
- Dipartimento di Medicina Sperimentale, Sapienza Università di Roma, Viale Regina Elena 324, 00161 Roma, Italy
| | - Ilaria Carnevale
- Dipartimento di Medicina Sperimentale, Sapienza Università di Roma, Viale Regina Elena 324, 00161 Roma, Italy
| | - Serena Saladini
- Dipartimento di Medicina Sperimentale, Sapienza Università di Roma, Viale Regina Elena 324, 00161 Roma, Italy
| | - Giulia Stazi
- Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185 Roma, Italy
| | - Clemens Zwergel
- Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185 Roma, Italy
| | - Peteris Trapencieris
- Department of Organic Chemistry, Latvian Institute of Organic Synthesis, Aizkraukles iela 21, Riga LV-1006, Latvia
| | - Elisabetta Ferretti
- Dipartimento di Medicina Sperimentale, Sapienza Università di Roma, Viale Regina Elena 324, 00161 Roma, Italy
| | - Marco Tafani
- Dipartimento di Medicina Sperimentale, Sapienza Università di Roma, Viale Regina Elena 324, 00161 Roma, Italy
| | - Sergio Valente
- Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185 Roma, Italy
| | - Antonello Mai
- Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185 Roma, Italy .,Istituto Pasteur-Fondazione Cenci Bolognetti, Sapienza Università di Roma, Roma, Italy
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53
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Skourti-Stathaki K, Torlai Triglia E, Warburton M, Voigt P, Bird A, Pombo A. R-Loops Enhance Polycomb Repression at a Subset of Developmental Regulator Genes. Mol Cell 2019; 73:930-945.e4. [PMID: 30709709 PMCID: PMC6414425 DOI: 10.1016/j.molcel.2018.12.016] [Citation(s) in RCA: 63] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Revised: 09/14/2018] [Accepted: 12/14/2018] [Indexed: 12/26/2022]
Abstract
R-loops are three-stranded nucleic acid structures that form during transcription, especially over unmethylated CpG-rich promoters of active genes. In mouse embryonic stem cells (mESCs), CpG-rich developmental regulator genes are repressed by the Polycomb complexes PRC1 and PRC2. Here, we show that R-loops form at a subset of Polycomb target genes, and we investigate their contribution to Polycomb repression. At R-loop-positive genes, R-loop removal leads to decreased PRC1 and PRC2 recruitment and Pol II activation into a productive elongation state, accompanied by gene derepression at nascent and processed transcript levels. Stable removal of PRC2 derepresses R-loop-negative genes, as expected, but does not affect R-loops, PRC1 recruitment, or transcriptional repression of R-loop-positive genes. Our results highlight that Polycomb repression does not occur via one mechanism but consists of different layers of repression, some of which are gene specific. We uncover that one such mechanism is mediated by an interplay between R-loops and RING1B recruitment. R-loops form at a subset of PcG target genes R-loops contribute to PcG recruitment genome-wide Loss of R-loops leads to transcriptional activation of R-loop-positive PcG targets R-loops and PRC1 contribute to transcriptional repression of PcG targets
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Affiliation(s)
- Konstantina Skourti-Stathaki
- Wellcome Trust Centre for Cell Biology, University of Edinburgh, EH9 3BF Edinburgh, UK; Berlin Institute for Medical Systems Biology, Max Delbrueck Centre for Molecular Medicine, Berlin-Buch 13092, Germany.
| | - Elena Torlai Triglia
- Berlin Institute for Medical Systems Biology, Max Delbrueck Centre for Molecular Medicine, Berlin-Buch 13092, Germany
| | - Marie Warburton
- Wellcome Trust Centre for Cell Biology, University of Edinburgh, EH9 3BF Edinburgh, UK
| | - Philipp Voigt
- Wellcome Trust Centre for Cell Biology, University of Edinburgh, EH9 3BF Edinburgh, UK
| | - Adrian Bird
- Wellcome Trust Centre for Cell Biology, University of Edinburgh, EH9 3BF Edinburgh, UK
| | - Ana Pombo
- Berlin Institute for Medical Systems Biology, Max Delbrueck Centre for Molecular Medicine, Berlin-Buch 13092, Germany; Berlin Institute of Health, Berlin, Germany; Institute for Biology, Humboldt-Universitat zu Berlin, Berlin, Germany.
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54
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Zheng N, Wang L, Hou Y, Zhou X, He Y, Wang Z. Rottlerin inhibits cell growth and invasion via down-regulation of EZH2 in prostate cancer. Cell Cycle 2018; 17:2460-2473. [PMID: 30394832 DOI: 10.1080/15384101.2018.1542897] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Rottlerin as a natural agent, which is isolated from Mallotus philippinensis, has been identified to play a critical role in tumor inhibition. However, the molecular mechanism of rottlerin-mediated anti-tumor activity is still ambiguous. It has been reported that EZH2 exhibits oncogenic functions in a variety of human cancers. Therefore, inhibition of EZH2 could be a promising strategy for the treatment of human cancers. In this study, we aim to explore whether rottlerin could inhibit tumorigenesis via suppression of EZH2 in prostate cancer cells. Multiple approaches such as FACS, Transwell invasion assay, RT-PCR, Western blotting, and transfection were performed to determine our aim. We found that rottlerin treatment led to inhibition of cell growth, migration and invasion, but induction of apoptosis in prostate cancer cells. Importantly, we defined that rottlerin decreased the expression of EZH2 and H3K27me3 in prostate cancer cells. Moreover, overexpression of EZH2 abrogated the rottlerin-induced inhibition of cell growth, migration, and invasion in prostate cancer cells. Consistently, down-regulation of EZH2 enhanced rottlerin-triggered anti-tumor function. Collectively, our work demonstrated that rottlerin exerted its tumor suppressive function via inhibition of EZH2 expression in prostate cancer cells. Our findings indicated that rottlerin might be a potential therapeutic compound for treating patients with prostate cancer.
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Affiliation(s)
- Nana Zheng
- a The Cyrus Tang Hematology Center and Collaborative Innovation Center of Hematology, Soochow University , Suzhou , China
| | - Lixia Wang
- a The Cyrus Tang Hematology Center and Collaborative Innovation Center of Hematology, Soochow University , Suzhou , China
| | - Yingying Hou
- a The Cyrus Tang Hematology Center and Collaborative Innovation Center of Hematology, Soochow University , Suzhou , China
| | - Xiuxia Zhou
- a The Cyrus Tang Hematology Center and Collaborative Innovation Center of Hematology, Soochow University , Suzhou , China
| | - Youhua He
- b Department of Urology , The Second Affiliated Hospital of Wenzhou Medical University , Wenzhou, Zhejiang , China
| | - Zhiwei Wang
- a The Cyrus Tang Hematology Center and Collaborative Innovation Center of Hematology, Soochow University , Suzhou , China.,b Department of Urology , The Second Affiliated Hospital of Wenzhou Medical University , Wenzhou, Zhejiang , China.,c Department of Biochemistry and Molecular Biology , School of Laboratory Medicine, Bengbu Medical College , Anhui , China
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55
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Abstract
The enhancer of zeste homolog 2 (EZH2) is the enzymatic subunit of the polycomb repressive complex 2 (PRC2) that exerts important functions during normal development as well as disease. PRC2 through EZH2 tri-methylates histone H3 lysine tail residue 27 (H3K27me3), a modification associated with repression of gene expression programs related to stem cell self-renewal, cell cycle, cell differentiation, and cellular transformation. EZH2 is deregulated and subjected to gain of function or loss of function mutations, and hence functions as an oncogene or tumor suppressor gene in a context-dependent manner. The development of highly selective inhibitors against the histone methyltransferase activity of EZH2 has also contributed to insight into the role of EZH2 and PRC2 in tumorigenesis, and their potential as therapeutic targets in cancer. EZH2 can function as an oncogene in multiple myeloma (MM) by repressing tumor suppressor genes that control apoptosis, cell cycle control and adhesion properties. Taken together these findings have raised the possibility that EZH2 inhibitors could be a useful therapeutic modality in MM alone or in combination with other targeted agents in MM. Therefore, we review the current knowledge on the regulation of EZH2 and its biological impact in MM, the anti-myeloma activity of EZH2 inhibitors and their potential as a targeted therapy in MM.
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Affiliation(s)
- Mohammad Alzrigat
- Division of Hematology and Oncology, Department of Medicine, University of Florida Health Cancer Center, University of Florida, Gainesville, FL 32610, USA;
| | - Helena Jernberg-Wiklund
- Science for Life Laboratory, Department of Immunology, Genetics and Pathology, Rudbeck Laboratory, Uppsala University, Uppsala, SE-75185 Uppsala, Sweden;
| | - Jonathan D Licht
- Division of Hematology and Oncology, Department of Medicine, University of Florida Health Cancer Center, University of Florida, Gainesville, FL 32610, USA;
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Yang F, Li X, Zhang L, Cheng L, Li X. LncRNA TUG1 promoted viability and associated with gemcitabine resistant in pancreatic ductal adenocarcinoma. J Pharmacol Sci 2018; 137:116-121. [PMID: 29960845 DOI: 10.1016/j.jphs.2018.06.002] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Revised: 04/17/2018] [Accepted: 05/08/2018] [Indexed: 12/23/2022] Open
Abstract
OBJECTIVE To investigate the underlying mechanism of lncRNA TUG1 in pancreatic ductal adenocarcinoma (PDAC). METHODS The expression of TUG1 was defined by qRT-PCR. The apoptotic cells were detected by flow cytometry assay. The cell migration and invasion were measured by scratch assay and Transwell assay. The level of ERK pathway was detected using Western blot. RESULTS Compared with normal tissues and cells, the expression of TUG1 was up-regulated in pancreatic cancer tissue and cells. Meanwhile, knockdown of TUG1 could promote PDAC cells apoptosis and inhibit PDAC cells viability, migration and invasion. In addition, overexpression of TUG1 enhanced the gemcitabine chemoresistance of PDAC cells. Surprisingly, gemcitabine combined with SCH772984 (a suppressor of ERK pathway) could reverse the drug resistance resulted from overexpression of TUG1. CONCLUSION TUG1 promoted the viability of PDAC cells and enhanced its resistance of gemcitabine.
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Affiliation(s)
- Fan Yang
- Department of Gastroenterology, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, 450003, China
| | - Xiaofang Li
- Department of Gastroenterology, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, 450003, China
| | - Lingjuan Zhang
- Department of Gastroenterology, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, 450003, China
| | - Lina Cheng
- Department of Gastroenterology, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, 450003, China
| | - Xiuling Li
- Department of Gastroenterology, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, 450003, China.
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57
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Choi HJ, Lee HB, Park HK, Cho SM, Han HJ, Lee SJ, Lee JY, Nam SJ, Cho EH, Son WC. EZH2 Expression in Naturally Occurring Canine Tumors. Comp Med 2018; 68:148-155. [PMID: 29663940 PMCID: PMC5897971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Revised: 08/16/2017] [Accepted: 10/15/2017] [Indexed: 06/08/2023]
Abstract
Enhancer of zeste homolog 2 (EZH2) shows upregulated expression in tumors and is an important driver of tumor development and progression. However, the mechanism underlying the mediation of tumor aggressiveness by EZH2 remains unclear. We here investigated the levels of EZH2 in various normal and tumorous dog tissues and compared these patterns with those of the corresponding human tissues. Immunohistochemical analysis showed positive staining for EZH2 in 76 of 82 cases of canine tumors, whereas low or negligible staining occurred in normal tissues and other canine tumors, including hepatocellular adenoma and lipoma. In particular, canine lymphoma, melanoma, basal cell tumors, squamous cell carcinoma, and prostate cancer all show EZH2 overexpression, as do their human counterparts. Given the similarities of spontaneous canine tumors to human cancers, we believe that these canine tumors can be used as animal models in future research and clinical trials in the development of EZH2 inhibitors.
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Affiliation(s)
- Hyun-Ji Choi
- University of Ulsan College of Medicine, Asan Institute for Life Sciences, and Department of Pathology, Asan Medical Center, Seoul, Korea
| | - Han-Byul Lee
- University of Ulsan College of Medicine, Asan Institute for Life Sciences, and Department of Pathology, Asan Medical Center, Seoul, Korea
| | - Hyun-Kyu Park
- University of Ulsan College of Medicine, Asan Institute for Life Sciences, and Department of Pathology, Asan Medical Center, Seoul, Korea
| | - Sung-Min Cho
- University of Ulsan College of Medicine, Asan Institute for Life Sciences, and Department of Pathology, Asan Medical Center, Seoul, Korea
| | - Hyo-Jeong Han
- University of Ulsan College of Medicine, Asan Institute for Life Sciences, and Department of Pathology, Asan Medical Center, Seoul, Korea
| | - Sang-Joon Lee
- University of Ulsan College of Medicine, Asan Institute for Life Sciences, and Department of Pathology, Asan Medical Center, Seoul, Korea
| | - Ji-Young Lee
- University of Ulsan College of Medicine, Asan Institute for Life Sciences, and Department of Pathology, Asan Medical Center, Seoul, Korea
| | - Su-Jeong Nam
- University of Ulsan College of Medicine, Asan Institute for Life Sciences, and Department of Pathology, Asan Medical Center, Seoul, Korea
| | - Eun-Ho Cho
- University of Ulsan College of Medicine, Asan Institute for Life Sciences, and Department of Pathology, Asan Medical Center, Seoul, Korea
| | - Woo-Chan Son
- University of Ulsan College of Medicine, Asan Institute for Life Sciences, and Department of Pathology, Asan Medical Center, Seoul, Korea.,
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58
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Li Y, Luo X, Guo Q, Nie Y, Wang T, Zhang C, Huang Z, Wang X, Liu Y, Chen Y, Zheng J, Yang S, Fan Y, Xiang R. Discovery of N1-(4-((7-Cyclopentyl-6-(dimethylcarbamoyl)-7H-pyrrolo[2,3-d]pyrimidin-2-yl)amino)phenyl)-N8-hydroxyoctanediamide as a Novel Inhibitor Targeting Cyclin-dependent Kinase 4/9 (CDK4/9) and Histone Deacetlyase1 (HDAC1) against Malignant Cancer. J Med Chem 2018. [PMID: 29518312 DOI: 10.1021/acs.jmedchem.8b00209] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Yongtao Li
- Department of Medicinal Chemistry, School of Medicine, Nankai University, 94 Weijin Road, Tianjin 300071, China
| | - Xiaohe Luo
- Department of Medicinal Chemistry, School of Medicine, Nankai University, 94 Weijin Road, Tianjin 300071, China
| | - Qingxiang Guo
- Department of Medicinal Chemistry, School of Medicine, Nankai University, 94 Weijin Road, Tianjin 300071, China
| | - Yongwei Nie
- Department of Medicinal Chemistry, School of Medicine, Nankai University, 94 Weijin Road, Tianjin 300071, China
| | - Tianqi Wang
- Department of Medicinal Chemistry, School of Medicine, Nankai University, 94 Weijin Road, Tianjin 300071, China
| | - Chao Zhang
- Department of Medicinal Chemistry, School of Medicine, Nankai University, 94 Weijin Road, Tianjin 300071, China
| | - Zhi Huang
- Department of Medicinal Chemistry, School of Medicine, Nankai University, 94 Weijin Road, Tianjin 300071, China
| | - Xin Wang
- Department of Medicinal Chemistry, School of Medicine, Nankai University, 94 Weijin Road, Tianjin 300071, China
| | - Yanhua Liu
- Department of Medicinal Chemistry, School of Medicine, Nankai University, 94 Weijin Road, Tianjin 300071, China
| | - Yanan Chen
- Department of Medicinal Chemistry, School of Medicine, Nankai University, 94 Weijin Road, Tianjin 300071, China
| | - Jianyu Zheng
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, Tianjin 300071, China
| | - Shengyong Yang
- Medical Oncology, Cancer Center, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Yan Fan
- Department of Medicinal Chemistry, School of Medicine, Nankai University, 94 Weijin Road, Tianjin 300071, China
- State Key Laboratory of Medicinal Chemical Biology, 94 Weijin Road, Tianjin 300071, China
- 2011 Project Collaborative Innovation Center for Biotherapy of Ministry of Education, 94 Weijin Road, Tianjin 300071, China
| | - Rong Xiang
- Department of Medicinal Chemistry, School of Medicine, Nankai University, 94 Weijin Road, Tianjin 300071, China
- State Key Laboratory of Medicinal Chemical Biology, 94 Weijin Road, Tianjin 300071, China
- 2011 Project Collaborative Innovation Center for Biotherapy of Ministry of Education, 94 Weijin Road, Tianjin 300071, China
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Abstract
Dysregulation of the histone methyltransferase EZH2 plays a critical role in the development of a variety of malignancies including B-cell lymphomas. As a result, a series of small molecule inhibitors of EZH2 have been developed and studied in the pre-clinical setting. Three EZH2 inhibitors: tazemetostat (EPZ-6438), GSK2816126 and CPI-1205 have moved into phase I/phase II clinical trials in patients with non-Hodgkin lymphoma and genetically defined solid tumors. Early data from the tazemetostat trials indicate an acceptable safety profile and early signs of activity in diffuse large B-cell lymphoma and follicular lymphoma, including patients with EZH2 wild-type and mutant tumors. In this review, we present the rationale, key pre-clinical and early clinical findings of small molecule EZH2 inhibitors for use in lymphoma as well as future challenges and potential opportunities for combination therapies.
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Affiliation(s)
- Nitya Gulati
- a Division of Pediatric Hematology/Oncology, Department of Pediatrics , Weill Cornell Medical College , New York , NY , USA.,b Division of Pediatric Hematology/Oncology , Memorial Sloan Kettering Cancer Center , New York , NY , USA
| | - Wendy Béguelin
- c Division of Hematology/Oncology, Department of Medicine , Weill Cornell Medical College , New York , NY , USA
| | - Lisa Giulino-Roth
- a Division of Pediatric Hematology/Oncology, Department of Pediatrics , Weill Cornell Medical College , New York , NY , USA.,b Division of Pediatric Hematology/Oncology , Memorial Sloan Kettering Cancer Center , New York , NY , USA.,c Division of Hematology/Oncology, Department of Medicine , Weill Cornell Medical College , New York , NY , USA
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Peña-Llopis S, Wan Y, Martinez ED. Unique epigenetic gene profiles define human breast cancers with poor prognosis. Oncotarget 2018; 7:85819-85831. [PMID: 27863398 PMCID: PMC5349877 DOI: 10.18632/oncotarget.13334] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Accepted: 10/29/2016] [Indexed: 01/09/2023] Open
Abstract
Epigenetic enzymes are at the nexus of cellular regulatory cascades and can drive cancer-specific deregulation at all stages of the oncogenic process, yet little is known about their prognostic value in human patients. Here, we used qRT-PCR to profile at high resolution the expression of fifty-five epigenetic genes in over one hundred human breast cancer samples and patient-matched benign tissues. We correlated expression patterns with clinical and histological parameters and validated our findings in two independent large patient cohorts (TCGA and METABRIC). We found that human breast malignancies have unique epigenetic profiles and cluster into epigenetic subgroups. A subset of epigenetic genes defined an Epigenetic Signature as an independent predictor of patient survival that outperforms triple negative status and other clinical variables. Our results also suggest that breast cancer grade, but not stage, is driven by transcriptional alterations of epigenetic modifiers. Overall, this study uncovers the presence of epigenetic subtypes within human mammary malignancies and identifies tumor subgroups with specific pharmacologically targetable epigenetic susceptibilities not yet therapeutically exploited.
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Affiliation(s)
- Samuel Peña-Llopis
- Department of Pharmacology, UT Southwestern Medical Center, Dallas, TX, USA.,Department of Translational Oncology, National Center for Tumor Diseases and German Cancer Research Center, Heidelberg, Germany
| | - Yihong Wan
- Department of Pharmacology, UT Southwestern Medical Center, Dallas, TX, USA
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Chen S, Pu J, Bai J, Yin Y, Wu K, Wang J, Shuai X, Gao J, Tao K, Wang G, Li H. EZH2 promotes hepatocellular carcinoma progression through modulating miR-22/galectin-9 axis. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2018; 37:3. [PMID: 29316949 PMCID: PMC5761110 DOI: 10.1186/s13046-017-0670-6] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/21/2017] [Accepted: 12/26/2017] [Indexed: 01/01/2023]
Abstract
Background Recent studies have shown that interferon-γ (IFN-γ)-induced galectin-9 expression in Kupffer cells plays an essential role in modulatingthe microenvironment of hepatitis-associated hepatocellular carcinoma (HCC). However, whether or not IFN-γ induces galectin-9 expression in HCC cells, its biological role and regulatory mechanism in HCC development and progression are poorly defined. Methods Quantitative PCR and western blotting analysis were used to detect galectin-9 and EZH2 levels in HCC cell lines stimulated with IFN-γ. Bioinformatics analysis and luciferase reporter assay were utilized to confirmthe binding ofmiR-22 to the 3′ untranslated region (3’-UTR) of galectin-9. The methylation status of miR-22 promoter was analyzed by MSP (Methylation specific PCR) and BSP (bisulfite sequencing PCR), while chromatin immunoprecipitation (ChIP) assay identify the occupation status of EZH2 and H3K27me3 at the promoter. Furthermore, the effect of ectopic expression of galectin-9 and miR-22 on cell proliferation, migration, invasion and cell apoptosis was assessed by using CCK-8, transwell assays and flow cytometric analysis, respectively. Results IFN-γ induces up-regulation of galectin-9 and EZH2 in HCC cell lines. Galectin-9 is a target of miR-22 and EZH2 facilitates galectin-9 expression by tri-methylation of H3K27 on miR-22 promoter but not hyper-methylation status of DNA. MiR-22 overexpression suppressed HCC cell growth, invasion, and metastasis both in vitro and in vivo. Interestingly, galectin-9 also exhibited antitumor effects, and restoring galectin-9 expression in miR-22 overexpressing cells strengthened its antitumor effects. Conclusions These findings indicated that EZH2 facilitates galectin-9 expression by epigenetically repressing miR-22 and that galectin-9, which is known as an immunosuppressant, also functions as a tumor suppressor in HCC. Electronic supplementary material The online version of this article (10.1186/s13046-017-0670-6) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Shaofei Chen
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Jiarui Pu
- Department of Pediatric Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Jie Bai
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Yuping Yin
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Ke Wu
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Jiliang Wang
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Xiaoming Shuai
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Jinbo Gao
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Kaixiong Tao
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Guobin Wang
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Hang Li
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China.
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Pan MR, Hsu MC, Chen LT, Hung WC. Orchestration of H3K27 methylation: mechanisms and therapeutic implication. Cell Mol Life Sci 2018; 75:209-223. [PMID: 28717873 PMCID: PMC5756243 DOI: 10.1007/s00018-017-2596-8] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 06/06/2017] [Accepted: 07/13/2017] [Indexed: 01/08/2023]
Abstract
Histone proteins constitute the core component of the nucleosome, the basic unit of chromatin. Chemical modifications of histone proteins affect their interaction with genomic DNA, the accessibility of recognized proteins, and the recruitment of enzymatic complexes to activate or diminish specific transcriptional programs to modulate cellular response to extracellular stimuli or insults. Methylation of histone proteins was demonstrated 50 years ago; however, the biological significance of each methylated residue and the integration between these histone markers are still under intensive investigation. Methylation of histone H3 on lysine 27 (H3K27) is frequently found in the heterochromatin and conceives a repressive marker that is linked with gene silencing. The identification of enzymes that add or erase the methyl group of H3K27 provides novel insights as to how this histone marker is dynamically controlled under different circumstances. Here we summarize the methyltransferases and demethylases involved in the methylation of H3K27 and show the new evidence by which the H3K27 methylation can be established via an alternative mechanism. Finally, the progress of drug development targeting H3K27 methylation-modifying enzymes and their potential application in cancer therapy are discussed.
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Affiliation(s)
- Mei-Ren Pan
- Graduate Institute of Clinical Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, 807, Taiwan
| | - Ming-Chuan Hsu
- National Institute of Cancer Research, National Health Research Institutes, Tainan, 704, Taiwan
| | - Li-Tzong Chen
- National Institute of Cancer Research, National Health Research Institutes, Tainan, 704, Taiwan
- Division of Hematology/Oncology, Department of Internal Medicine, National Cheng Kung University Hospital, Tainan, 704, Taiwan
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, 804, Taiwan
| | - Wen-Chun Hung
- National Institute of Cancer Research, National Health Research Institutes, Tainan, 704, Taiwan.
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, 804, Taiwan.
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63
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Li W, Hou G, Zhou D, Lou X, Xu Y, Liu S, Zhao X. The roles of AKR1C1 and AKR1C2 in ethyl-3,4-dihydroxybenzoate induced esophageal squamous cell carcinoma cell death. Oncotarget 2017; 7:21542-55. [PMID: 26934124 PMCID: PMC5008304 DOI: 10.18632/oncotarget.7775] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2015] [Accepted: 02/20/2016] [Indexed: 12/11/2022] Open
Abstract
The aldo-keto reductase (AKR) superfamily of enzymes is critical for the detoxification of drugs and toxins in the human body; these enzymes are involved not only in the development of drug resistance in cancer cells but also in the metabolism of polycyclic aromatic hydrocarbons. Here, we demonstrated that AKR1C1/C2 increased the metabolism of ethyl-3,4-dihydroxybenzoate (EDHB) in esophageal squamous cell carcinoma (ESCC) cells. Previous studies have shown that EDHB can effectively induce esophageal cancer cell autophagy and apoptosis, and the AKR1C family represents one set of highly expressed genes after EDHB treatment. To explore the cytotoxic effects of EDHB, esophageal cancer cells with higher (KYSE180) or lower (KYSE510) AKR1C expression levels were evaluated in this study. The proliferation of KYSE180 cells was inhibited more effectively than that of KYSE510 cells by EDHB treatment. Furthermore, the effective subunits of the AKR superfamily, AKR1C1/C2, were quantitatively identified using multiple reaction monitoring (MRM) assays. The sensitivity of esophageal cancer cells to EDHB was significantly attenuated by the siRNA knockdown of AKR1C1/C2. Moreover, the expression of autophagy inducers (Beclin, LC3II and BNIP3) and NDRG1 was significantly elevated in KYSE180 cells, but not in KYSE510 cells, after EDHB treatment. When autophagy was inhibited by 3-methyladenine, KYSE180 cells exhibited an increased sensitivity to EDHB, which may be a metabolic substrate of AKR1C1/C2. These results indicated that ESCC patients with high AKR1C1/C2 expression may be more sensitive to EDHB, and AKR1C1/C2 may facilitate EDHB-induced autophagy and apoptosis, thus providing potential guidance for the chemoprevention of ESCC.
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Affiliation(s)
- Wei Li
- State Key Laboratory of Molecular Oncology, Cancer Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing, China
| | - Guixue Hou
- CAS Key Laboratory of Genome Sciences and Information, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China.,Proteomics Division, BGI-Shenzhen, Shenzhen, Guangdong, China
| | - Dianrong Zhou
- Third School of Clinical Medicine, Southern Medical University, Guangzhou, China
| | - Xiaomin Lou
- CAS Key Laboratory of Genome Sciences and Information, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China
| | - Yang Xu
- State Key Laboratory of Molecular Oncology, Cancer Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing, China
| | - Siqi Liu
- CAS Key Laboratory of Genome Sciences and Information, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China.,Proteomics Division, BGI-Shenzhen, Shenzhen, Guangdong, China
| | - Xiaohang Zhao
- State Key Laboratory of Molecular Oncology, Cancer Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing, China
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64
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Lu R, Wang GG. Pharmacologic Targeting of Chromatin Modulators As Therapeutics of Acute Myeloid Leukemia. Front Oncol 2017; 7:241. [PMID: 29075615 PMCID: PMC5643408 DOI: 10.3389/fonc.2017.00241] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2017] [Accepted: 09/21/2017] [Indexed: 11/15/2022] Open
Abstract
Acute myeloid leukemia (AML), a common hematological cancer of myeloid lineage cells, generally exhibits poor prognosis in the clinic and demands new treatment options. Recently, direct sequencing of samples from human AMLs and pre-leukemic diseases has unveiled their mutational landscapes and significantly advanced the molecular understanding of AML pathogenesis. The newly identified recurrent mutations frequently “hit” genes encoding epigenetic modulators, a wide range of chromatin-modifying enzymes and regulatory factors involved in gene expression regulation, supporting aberration of chromatin structure and epigenetic modification as a main oncogenic mechanism and cancer-initiating event. Increasing body of evidence demonstrates that chromatin modification aberrations underlying the formation of blood cancer can be reversed by pharmacological targeting of the responsible epigenetic modulators, thus providing new mechanism-based treatment strategies. Here, we summarize recent advances in development of small-molecule inhibitors specific to chromatin factors and their potential applications in the treatment of genetically defined AMLs. These compounds selectively inhibit various subclasses of “epigenetic writers” (such as histone methyltransferases MLL/KMT2A, G9A/KMT1C, EZH2/KMT6A, DOT1L/KMT4, and PRMT1), “epigenetic readers” (such as BRD4 and plant homeodomain finger proteins), and “epigenetic erasers” (such as histone demethylases LSD1/KDM1A and JMJD2C/KDM4C). We also discuss about the molecular mechanisms underpinning therapeutic effect of these epigenetic compounds in AML and favor their potential usage for combinational therapy and treatment of pre-leukemia diseases.
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Affiliation(s)
- Rui Lu
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, NC, United States.,Department of Biochemistry and Biophysics, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Gang Greg Wang
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, NC, United States.,Department of Biochemistry and Biophysics, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
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65
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Ma Z, Huang H, Xu Y, He X, Wang J, Hui B, Ji H, Zhou J, Wang K. Current advances of long non-coding RNA highly upregulated in liver cancer in human tumors. Onco Targets Ther 2017; 10:4711-4717. [PMID: 29026319 PMCID: PMC5626378 DOI: 10.2147/ott.s136915] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Long non-coding RNAs (lncRNAs) are a group of non-coding RNAs (ncRNAs) >200 nucleotides in length that govern diverse biological processes. Recent evidence suggests that lncRNAs are involved in cancer cell proliferation, apoptosis, invasion, migration, and metastasis. Dysregulation of lncRNAs has been observed in various tumors, and lncRNAs act as oncogenes or tumor suppressors in these malignancies. It has been revealed that lncRNA highly upregulated in liver cancer (HULC) is tightly correlated with a number of cancers such as hepatocellular carcinoma, gastric cancer, colorectal cancer, osteosarcoma, and diffuse large B-cell lymphoma. Depletion of HULC suppressed cancer cell proliferation, migration, and invasion and induced apoptosis. Additionally, HULC may function as a diagnostic biomarker and prognostic indicator for some tumors. In this review, we summarize the current knowledge of the role of HULC in cancer progression and the clinical management of human cancers.
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Affiliation(s)
- Zhonghua Ma
- The Second Clinical Medical College.,Department of Oncology, Second Affiliated Hospital
| | - Hesuyuan Huang
- Department of Cardiothoracic Surgery, Children's Hospital
| | - Yetao Xu
- Department of Obstetrics and Gynecology, First Affiliated Hospital
| | - Xuezhi He
- Department of Biochemistry and Molecular Biology, Nanjing Medical University, Nanjing, Jiangsu, People's Republic of China
| | - Jirong Wang
- Department of Oncology, Second Affiliated Hospital
| | - Bingqing Hui
- The Second Clinical Medical College.,Department of Oncology, Second Affiliated Hospital
| | - Hao Ji
- The Second Clinical Medical College.,Department of Oncology, Second Affiliated Hospital
| | - Jing Zhou
- The Second Clinical Medical College.,Department of Oncology, Second Affiliated Hospital
| | - Keming Wang
- The Second Clinical Medical College.,Department of Oncology, Second Affiliated Hospital
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66
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Miele E, Valente S, Alfano V, Silvano M, Mellini P, Borovika D, Marrocco B, Po A, Besharat ZM, Catanzaro G, Battaglia G, Abballe L, Zwergel C, Stazi G, Milite C, Castellano S, Tafani M, Trapencieris P, Mai A, Ferretti E. The histone methyltransferase EZH2 as a druggable target in SHH medulloblastoma cancer stem cells. Oncotarget 2017; 8:68557-68570. [PMID: 28978137 PMCID: PMC5620277 DOI: 10.18632/oncotarget.19782] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Accepted: 06/20/2017] [Indexed: 12/21/2022] Open
Abstract
The histone methyltransferase EZH2 plays a role in maintenance of the stem component of cancer, and its overexpression and/or mutation typically drives tumor aggressiveness, drug resistance and patients' poor prognosis. In this study, we use mouse and human medulloblastoma stem-like cells belonging to the Sonic Hedgehog subgroup (SHH MB-SLCs) and demonstrate that genetic suppression of EZH2 reduces the level of its histone mark H3K27me3 and lowers proliferation and self-renewal. We designed an EZH2 inhibitor (EZH2i) as a simplified analog of EPZ005687 and GSK2816126, MC3629, and we tested its biological activity in SHH MB-SLCs. Pharmacological inhibition of EZH2 impairs SHH MB cells proliferation and self-renewal, and induces apoptosis in vitro. Finally, we generated xenograft MB-SLCs orthotopic tumors in nude mice to test MC3629 in vivo. In treated mice, we observed impairment of tumor growth, together with induction of apoptosis and reduction of proliferation and stemness. Overall, these findings describe EZH2 as a druggable target in MB and provide insight into the biological activity of MC3629 as an EZH2i.
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Affiliation(s)
- Evelina Miele
- Center for Life NanoScience@Sapienza, Istituto Italiano di Tecnologia, Rome 00161, Italy
- Current address: Department of Hematology/Oncology and Stem Cell Transplantation, Bambino Gesù, 28 Children's Hospital, IRCCS, Rome 00165, Italy
| | - Sergio Valente
- Department of Chemistry and Technologies of Drugs, Sapienza University of Rome, Rome 00185, Italy
| | - Vincenzo Alfano
- Department of Experimental Medicine, Sapienza University of Rome, Rome 00161, Italy
| | - Marianna Silvano
- Department of Experimental Medicine, Sapienza University of Rome, Rome 00161, Italy
| | - Paolo Mellini
- Department of Chemistry and Technologies of Drugs, Sapienza University of Rome, Rome 00185, Italy
| | - Diana Borovika
- Latvian Institute of Organic Synthesis, Riga LV-1006, Latvia
| | - Biagina Marrocco
- Department of Chemistry and Technologies of Drugs, Sapienza University of Rome, Rome 00185, Italy
| | - Agnese Po
- Department of Molecular Medicine, Sapienza University of Rome, Rome 00161, Italy
| | | | - Giuseppina Catanzaro
- Department of Experimental Medicine, Sapienza University of Rome, Rome 00161, Italy
| | | | - Luana Abballe
- Department of Experimental Medicine, Sapienza University of Rome, Rome 00161, Italy
| | - Clemens Zwergel
- Department of Chemistry and Technologies of Drugs, Sapienza University of Rome, Rome 00185, Italy
| | - Giulia Stazi
- Department of Chemistry and Technologies of Drugs, Sapienza University of Rome, Rome 00185, Italy
| | - Ciro Milite
- Department of Pharmacy, University of Salerno, Fisciano 84084, Italy
| | - Sabrina Castellano
- Department of Pharmacy, University of Salerno, Fisciano 84084, Italy
- Department of Medicine and Surgery, University of Salerno, Baronissi 84084, Italy
| | - Marco Tafani
- Department of Experimental Medicine, Sapienza University of Rome, Rome 00161, Italy
| | | | - Antonello Mai
- Department of Chemistry and Technologies of Drugs, Sapienza University of Rome, Rome 00185, Italy
- Pasteur Institute, Cenci-Bolognetti Foundation, Sapienza University of Rome, Rome 00185, Italy
| | - Elisabetta Ferretti
- Department of Experimental Medicine, Sapienza University of Rome, Rome 00161, Italy
- Neuromed Institute, Località Camerelle, Pozzilli 86077, Italy
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67
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Dupret B, Völkel P, Vennin C, Toillon RA, Le Bourhis X, Angrand PO. The histone lysine methyltransferase Ezh2 is required for maintenance of the intestine integrity and for caudal fin regeneration in zebrafish. BIOCHIMICA ET BIOPHYSICA ACTA-GENE REGULATORY MECHANISMS 2017; 1860:1079-1093. [PMID: 28887218 DOI: 10.1016/j.bbagrm.2017.08.011] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Revised: 08/16/2017] [Accepted: 08/27/2017] [Indexed: 10/18/2022]
Abstract
The histone lysine methyltransferase EZH2, as part of the Polycomb Repressive Complex 2 (PRC2), mediates H3K27me3 methylation which is involved in gene expression program repression. Through its action, EZH2 controls cell-fate decisions during the development and the differentiation processes. Here, we report the generation and the characterization of an ezh2-deficient zebrafish line. In contrast to its essential role in mouse early development, loss of ezh2 function does not affect zebrafish gastrulation. Ezh2 zebrafish mutants present a normal body plan but die at around 12 dpf with defects in the intestine wall, due to enhanced cell death. Thus, ezh2-deficient zebrafish can initiate differentiation toward the different developmental lineages but fail to maintain the intestinal homeostasis. Expression studies revealed that ezh2 mRNAs are maternally deposited. Then, ezh2 is ubiquitously expressed in the anterior part of the embryos at 24 hpf, but its expression becomes restricted to specific regions at later developmental stages. Pharmacological inhibition of Ezh2 showed that maternal Ezh2 products contribute to early development but are dispensable to body plan formation. In addition, ezh2-deficient mutants fail to properly regenerate their spinal cord after caudal fin transection suggesting that Ezh2 and H3K27me3 methylation might also be involved in the process of regeneration in zebrafish.
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Affiliation(s)
- Barbara Dupret
- Cell Plasticity & Cancer, Inserm U908/University of Lille, Lille, France
| | - Pamela Völkel
- Cell Plasticity & Cancer, Inserm U908/University of Lille, Lille, France; CNRS, Lille, France
| | - Constance Vennin
- Cell Plasticity & Cancer, Inserm U908/University of Lille, Lille, France; SIRIC ONCOLille, Lille, France
| | | | - Xuefen Le Bourhis
- Cell Plasticity & Cancer, Inserm U908/University of Lille, Lille, France
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68
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69
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Inhibitors of the Histone Methyltransferases EZH2/1 Induce a Potent Antiviral State and Suppress Infection by Diverse Viral Pathogens. mBio 2017; 8:mBio.01141-17. [PMID: 28811345 PMCID: PMC5559635 DOI: 10.1128/mbio.01141-17] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Epigenetic regulation is based on a network of complexes that modulate the chromatin character and structure of the genome to impact gene expression, cell fate, and development. Thus, epigenetic modulators represent novel therapeutic targets used to treat a range of diseases, including malignancies. Infectious pathogens such as herpesviruses are also regulated by cellular epigenetic machinery, and epigenetic therapeutics represent a novel approach used to control infection, persistence, and the resulting recurrent disease. The histone H3K27 methyltransferases EZH2 and EZH1 (EZH2/1) are epigenetic repressors that suppress gene transcription via propagation of repressive H3K27me3-enriched chromatin domains. However, while EZH2/1 are implicated in the repression of herpesviral gene expression, inhibitors of these enzymes suppressed primary herpes simplex virus (HSV) infection in vitro and in vivo. Furthermore, these compounds blocked lytic viral replication following induction of HSV reactivation in latently infected sensory ganglia. Suppression correlated with the induction of multiple inflammatory, stress, and antipathogen pathways, as well as enhanced recruitment of immune cells to in vivo infection sites. Importantly, EZH2/1 inhibitors induced a cellular antiviral state that also suppressed infection with DNA (human cytomegalovirus, adenovirus) and RNA (Zika virus) viruses. Thus, EZH2/1 inhibitors have considerable potential as general antivirals through the activation of cellular antiviral and immune responses. A significant proportion of the world’s population is infected with herpes simplex virus. Primary infection and subsequent recurrent reactivation can result in diseases ranging from mild lesions to severe ocular or neurological damage. Herpesviruses are subject to epigenetic regulation that modulates viral gene expression, lytic replication, and latency-reactivation cycles. Thus, epigenetic pharmaceuticals have the potential to alter the course of infection and disease. Here, while the histone methyltransferases EZH2/1 are implicated in the suppression of herpesviruses, inhibitors of these repressors unexpectedly suppress viral infection in vitro and in vivo by induction of key components of cellular innate defense pathways. These inhibitors suppress infection by multiple viral pathogens, indicating their potential as broad-spectrum antivirals.
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70
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Polycomb repressive complexes in hematological malignancies. Blood 2017; 130:23-29. [DOI: 10.1182/blood-2017-02-739490] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Accepted: 05/03/2017] [Indexed: 12/21/2022] Open
Abstract
Abstract
The deregulation of polycomb repressive complexes (PRCs) has been reported in a number of hematological malignancies. These complexes exert oncogenic or tumor-suppressive functions depending on tumor type. These findings have revolutionized our understanding of the pathophysiology of hematological malignancies and the impact of deregulated epigenomes in tumor development and progression. The therapeutic targeting of PRCs is currently attracting increasing attention and being extensively examined in clinical studies, leading to new therapeutic strategies that may improve the outcomes of patients with hematological malignancies.
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71
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Shi Y, Wang XX, Zhuang YW, Jiang Y, Melcher K, Xu HE. Structure of the PRC2 complex and application to drug discovery. Acta Pharmacol Sin 2017; 38:963-976. [PMID: 28414199 PMCID: PMC5519257 DOI: 10.1038/aps.2017.7] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Accepted: 01/10/2017] [Indexed: 02/07/2023] Open
Abstract
The polycomb repressive complexes 2 (PRC2) complex catalyzes tri-methylation of histone H3 lysine 27 (H3K27), a repressive chromatin marker associated with gene silencing. Overexpression and mutations of PRC2 are found in a wide variety of cancers, making the catalytic activity of PRC2 an important target of cancer therapy. This review highlights recent structural breakthroughs of the human PRC2 complex bound to the H3K27 peptide and a small molecule inhibitor, which provide critically needed insight into PRC2-targeted drug discovery.
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Affiliation(s)
- Yi Shi
- Key Laboratory of Receptor Research, VARI-SIMM Center, Center for Structure and Function of Drug Targets, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Xiao-xi Wang
- Key Laboratory of Receptor Research, VARI-SIMM Center, Center for Structure and Function of Drug Targets, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - You-wen Zhuang
- Key Laboratory of Receptor Research, VARI-SIMM Center, Center for Structure and Function of Drug Targets, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Yi Jiang
- Key Laboratory of Receptor Research, VARI-SIMM Center, Center for Structure and Function of Drug Targets, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Karsten Melcher
- Laboratory of Structural Sciences, Van Andel Research Institute, Grand Rapids, MI 49503, USA
| | - H Eric Xu
- Key Laboratory of Receptor Research, VARI-SIMM Center, Center for Structure and Function of Drug Targets, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
- Laboratory of Structural Sciences, Van Andel Research Institute, Grand Rapids, MI 49503, USA
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72
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Cofre J, Abdelhay E. Cancer Is to Embryology as Mutation Is to Genetics: Hypothesis of the Cancer as Embryological Phenomenon. ScientificWorldJournal 2017; 2017:3578090. [PMID: 28553657 PMCID: PMC5434308 DOI: 10.1155/2017/3578090] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Accepted: 03/20/2017] [Indexed: 01/20/2023] Open
Abstract
Despite numerous advances in cell biology, genetics, and developmental biology, cancer origin has been attributed to genetic mechanisms primarily involving mutations. Embryologists have expressed timidly cancer embryological origin with little success in leveraging the discussion that cancer could involve a set of conventional cellular processes used to build the embryo during morphogenesis. Thus, this "cancer process" allows the harmonious and coherent construction of the embryo structural base, and its implementation as the embryonic process involves joint regulation of differentiation, proliferation, cell invasion, and migration, enabling the human being recreation of every generation. On the other hand, "cancer disease" is the representation of an abnormal state of the cell that might happen in the stem cells of an adult person, in which the mechanism for joint gene regulating of differentiation, proliferation, cell invasion, and migration could be reactivated in an entirely inappropriate context.
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Affiliation(s)
- Jaime Cofre
- Laboratório de Embriologia Molecular e Câncer, Universidade Federal de Santa Catarina, Sala 313b, 88040-900 Florianópolis, SC, Brazil
| | - Eliana Abdelhay
- Divisão de Laboratórios do CEMO, Instituto Nacional do Câncer, Rio de Janeiro, RJ, Brazil
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73
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Abstract
Cancer cell hallmarks are underpinned by transcriptional programmes operating in the context of a dynamic and complicit epigenomic environment. Somatic alterations of chromatin modifiers are among the most prevalent cancer perturbations. There is a pressing need for targeted chemical probes to dissect these complex, interconnected gene regulatory circuits. Validated chemical probes empower mechanistic research while providing the pharmacological proof of concept that is required to translate drug-like derivatives into therapy for cancer patients. In this Review, we describe chemical probe development for epigenomic effector proteins that are linked to cancer pathogenesis. By annotating these reagents, we aim to share our perspectives on an informative 'epigenomic toolbox' of broad utility to the research community.
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Affiliation(s)
- Jake Shortt
- Gene Regulation Laboratory, Research Division, Peter MacCallum Cancer Centre, Melbourne 3000, Australia
- Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville 3052, Australia
- School of Clinical Sciences at Monash Health, Monash University, Clayton 3168, Australia
| | - Christopher J Ott
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts 02215, USA
- Department of Medicine, Harvard Medical School, Boston, Massachusetts 02215, USA
- Center for the Science of Therapeutics, Broad Institute, Cambridge, Massachusetts 02142, USA
| | - Ricky W Johnstone
- Gene Regulation Laboratory, Research Division, Peter MacCallum Cancer Centre, Melbourne 3000, Australia
- Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville 3052, Australia
| | - James E Bradner
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts 02215, USA
- Department of Medicine, Harvard Medical School, Boston, Massachusetts 02215, USA
- Center for the Science of Therapeutics, Broad Institute, Cambridge, Massachusetts 02142, USA
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74
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Huang Y, Zhang J, Yu Z, Zhang H, Wang Y, Lingel A, Qi W, Gu J, Zhao K, Shultz MD, Wang L, Fu X, Sun Y, Zhang Q, Jiang X, Zhang J, Zhang C, Li L, Zeng J, Feng L, Zhang C, Liu Y, Zhang M, Zhang L, Zhao M, Gao Z, Liu X, Fang D, Guo H, Mi Y, Gabriel T, Dillon MP, Atadja P, Oyang C. Discovery of First-in-Class, Potent, and Orally Bioavailable Embryonic Ectoderm Development (EED) Inhibitor with Robust Anticancer Efficacy. J Med Chem 2017; 60:2215-2226. [DOI: 10.1021/acs.jmedchem.6b01576] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Ying Huang
- Novartis Institutes for BioMedical Research, 4218 Jinke Road, Shanghai 201203, China
| | - Jeff Zhang
- Novartis Institutes for BioMedical Research, 4218 Jinke Road, Shanghai 201203, China
| | - Zhengtian Yu
- Novartis Institutes for BioMedical Research, 4218 Jinke Road, Shanghai 201203, China
| | - Hailong Zhang
- Novartis Institutes for BioMedical Research, 4218 Jinke Road, Shanghai 201203, China
| | - Youzhen Wang
- Novartis Institutes for BioMedical Research, 4218 Jinke Road, Shanghai 201203, China
| | - Andreas Lingel
- Novartis Institutes for BioMedical Research, 5300 Chiron Way, Emeryville, California 94608, United States
| | - Wei Qi
- Novartis Institutes for BioMedical Research, 4218 Jinke Road, Shanghai 201203, China
| | - Justin Gu
- Novartis Institutes for BioMedical Research, 4218 Jinke Road, Shanghai 201203, China
| | - Kehao Zhao
- Novartis Institutes for BioMedical Research, 4218 Jinke Road, Shanghai 201203, China
| | - Michael D. Shultz
- Novartis Institutes for BioMedical Research, 4218 Jinke Road, Shanghai 201203, China
| | - Long Wang
- Novartis Institutes for BioMedical Research, 4218 Jinke Road, Shanghai 201203, China
| | - Xingnian Fu
- Novartis Institutes for BioMedical Research, 4218 Jinke Road, Shanghai 201203, China
| | - Yongfeng Sun
- Novartis Institutes for BioMedical Research, 4218 Jinke Road, Shanghai 201203, China
| | - Qiong Zhang
- Novartis Institutes for BioMedical Research, 4218 Jinke Road, Shanghai 201203, China
| | - Xiangqing Jiang
- Novartis Institutes for BioMedical Research, 4218 Jinke Road, Shanghai 201203, China
| | - Jiangwei Zhang
- Novartis Institutes for BioMedical Research, 4218 Jinke Road, Shanghai 201203, China
| | - Chunye Zhang
- Novartis Institutes for BioMedical Research, 4218 Jinke Road, Shanghai 201203, China
| | - Ling Li
- Novartis Institutes for BioMedical Research, 4218 Jinke Road, Shanghai 201203, China
| | - Jue Zeng
- Novartis Institutes for BioMedical Research, 4218 Jinke Road, Shanghai 201203, China
| | - Lijian Feng
- Novartis Institutes for BioMedical Research, 4218 Jinke Road, Shanghai 201203, China
| | - Chao Zhang
- Novartis Institutes for BioMedical Research, 4218 Jinke Road, Shanghai 201203, China
| | - Yueqin Liu
- Novartis Institutes for BioMedical Research, 4218 Jinke Road, Shanghai 201203, China
| | - Man Zhang
- Novartis Institutes for BioMedical Research, 4218 Jinke Road, Shanghai 201203, China
| | - Lijun Zhang
- Novartis Institutes for BioMedical Research, 4218 Jinke Road, Shanghai 201203, China
| | - Mengxi Zhao
- Novartis Institutes for BioMedical Research, 4218 Jinke Road, Shanghai 201203, China
| | - Zhenting Gao
- Novartis Institutes for BioMedical Research, 4218 Jinke Road, Shanghai 201203, China
| | - Xianghui Liu
- Novartis Institutes for BioMedical Research, 4218 Jinke Road, Shanghai 201203, China
| | - Douglas Fang
- Novartis Institutes for BioMedical Research, 4218 Jinke Road, Shanghai 201203, China
| | - Haibing Guo
- Novartis Institutes for BioMedical Research, 4218 Jinke Road, Shanghai 201203, China
| | - Yuan Mi
- Novartis Institutes for BioMedical Research, 4218 Jinke Road, Shanghai 201203, China
| | - Tobias Gabriel
- Novartis Institutes for BioMedical Research, 4218 Jinke Road, Shanghai 201203, China
| | - Michael P. Dillon
- Novartis Institutes for BioMedical Research, 5300 Chiron Way, Emeryville, California 94608, United States
| | - Peter Atadja
- Novartis Institutes for BioMedical Research, 4218 Jinke Road, Shanghai 201203, China
| | - Counde Oyang
- Novartis Institutes for BioMedical Research, 4218 Jinke Road, Shanghai 201203, China
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Xie R, Wu SN, Gao CC, Yang XZ, Wang HG, Zhang JL, Yan W, Ma TH. MicroRNA-30d inhibits the migration and invasion of human esophageal squamous cell carcinoma cells via the post‑transcriptional regulation of enhancer of zeste homolog 2. Oncol Rep 2017; 37:1682-1690. [PMID: 28184915 DOI: 10.3892/or.2017.5405] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Accepted: 09/06/2016] [Indexed: 11/09/2022] Open
Abstract
The present study was carried out to investigate the expression pattern, clinical significance and biological functions of microRNA-30d (miR-30d) in esophageal carcinogenesis. Quantitative real-time PCR was performed to detect the expression levels of miR-30d in esophageal squamous cell carcinoma (ESCC) tissues and cell lines. Then, associations between miR-30d expression and various clinicopathological features of patients with ESCC were statistically evaluated. In addition, the effects of miR-30d on the migration and invasion of two human ESCC cell lines transfected with miRNA or co-transfected with miRNA mimics and the expression vector of its target gene were determined. The results revealed that the expression levels of miR-30d were markedly decreased in ESCC tissues and cell lines, comparing with the corresponding normal controls. Notably, reduced expression of miR-30d occurred more frequently in ESCC patients with positive lymph node metastasis, moderate-poor differentiation and advanced tumor-node-metastasis stage than those with negative features. Functionally, enforced expression of miR-30d was found to inhibit cell invasion and migration of the ESCC cell lines. Luciferase reporter assay identified enhancer of zeste homolog 2 (EZH2) as a direct target gene of miR-30d. The expression level of EZH2 mRNA was negatively correlated with the expression of miR-30d in the ESCC tissues. Moreover, the inhibitory effect of miR-30d on ESCC cell motility was reversed by EZH2 overexpression. Collectively, these findings provide convincing evidence that decreased expression of miR-30d may be implicated in esophageal carcinogenesis and progression. We also confirmed miR-30d as a tumor-suppressor which may inhibit cancer cell motility by targeting EZH2, a potential therapeutic target for ESCC.
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Affiliation(s)
- Rui Xie
- Department of Gastroenterology, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, Jiangsu 223300, P.R. China
| | - Shang-Nong Wu
- Department of Gastroenterology, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, Jiangsu 223300, P.R. China
| | - Cheng-Cheng Gao
- Department of Gastroenterology, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, Jiangsu 223300, P.R. China
| | - Xiao-Zhong Yang
- Department of Gastroenterology, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, Jiangsu 223300, P.R. China
| | - Hong-Gang Wang
- Department of Gastroenterology, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, Jiangsu 223300, P.R. China
| | - Jia-Ling Zhang
- Department of Gastroenterology, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, Jiangsu 223300, P.R. China
| | - Wei Yan
- Department of Gastroenterology, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, Jiangsu 223300, P.R. China
| | - Tian-Heng Ma
- Department of Gastroenterology, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, Jiangsu 223300, P.R. China
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76
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Sarmento OF, Svingen PA, Xiong Y, Sun Z, Bamidele AO, Mathison AJ, Smyrk TC, Nair AA, Gonzalez MM, Sagstetter MR, Baheti S, McGovern DPB, Friton JJ, Papadakis KA, Gautam G, Xavier RJ, Urrutia RA, Faubion WA. The Role of the Histone Methyltransferase Enhancer of Zeste Homolog 2 (EZH2) in the Pathobiological Mechanisms Underlying Inflammatory Bowel Disease (IBD). J Biol Chem 2017; 292:706-722. [PMID: 27909059 PMCID: PMC5241744 DOI: 10.1074/jbc.m116.749663] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Revised: 11/21/2016] [Indexed: 12/14/2022] Open
Abstract
Regulatory T (Treg) cells expressing the transcription factor FOXP3 play a pivotal role in maintaining immunologic self-tolerance. We and others have shown previously that EZH2 is recruited to the FOXP3 promoter and its targets in Treg cells. To further address the role for EZH2 in Treg cellular function, we have now generated mice that lack EZH2 specifically in Treg cells (EZH2Δ/ΔFOXP3+). We find that EZH2 deficiency in FOXP3+ T cells results in lethal multiorgan autoimmunity. We further demonstrate that EZH2Δ/ΔFOXP3+ T cells lack a regulatory phenotype in vitro and secrete proinflammatory cytokines. Of special interest, EZH2Δ/ΔFOXP3+ mice develop spontaneous inflammatory bowel disease. Guided by these results, we assessed the FOXP3 and EZH2 gene networks by RNA sequencing in isolated intestinal CD4+ T cells from patients with Crohn's disease. Gene network analysis demonstrates that these CD4+ T cells display a Th1/Th17-like phenotype with an enrichment of gene targets shared by FOXP3 and EZH2. Combined, these results suggest that the inflammatory milieu found in Crohn's disease could lead to or result from deregulation of FOXP3/EZH2-enforced T cell gene networks contributing to the underlying intestinal inflammation.
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Affiliation(s)
- Olga F Sarmento
- From the Epigenetics and Chromatin Dynamics Laboratory, Division of Gastroenterology and Hepatology and Translational Epigenomic Program, Center for Individualized Medicine
| | - Phyllis A Svingen
- From the Epigenetics and Chromatin Dynamics Laboratory, Division of Gastroenterology and Hepatology and Translational Epigenomic Program, Center for Individualized Medicine
| | - Yuning Xiong
- From the Epigenetics and Chromatin Dynamics Laboratory, Division of Gastroenterology and Hepatology and Translational Epigenomic Program, Center for Individualized Medicine
| | - Zhifu Sun
- Division of Biomedical Statistics and Informatics, and
| | - Adebowale O Bamidele
- From the Epigenetics and Chromatin Dynamics Laboratory, Division of Gastroenterology and Hepatology and Translational Epigenomic Program, Center for Individualized Medicine
| | - Angela J Mathison
- From the Epigenetics and Chromatin Dynamics Laboratory, Division of Gastroenterology and Hepatology and Translational Epigenomic Program, Center for Individualized Medicine
| | - Thomas C Smyrk
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota 55905
| | - Asha A Nair
- Division of Biomedical Statistics and Informatics, and
| | - Michelle M Gonzalez
- From the Epigenetics and Chromatin Dynamics Laboratory, Division of Gastroenterology and Hepatology and Translational Epigenomic Program, Center for Individualized Medicine
| | - Mary R Sagstetter
- From the Epigenetics and Chromatin Dynamics Laboratory, Division of Gastroenterology and Hepatology and Translational Epigenomic Program, Center for Individualized Medicine
| | | | - Dermot P B McGovern
- the F. Widjaja Foundation Inflammatory Bowel and Immunobiology Research Institute, Cedars-Sinai Hospital, Los Angeles, California 90048
| | - Jessica J Friton
- From the Epigenetics and Chromatin Dynamics Laboratory, Division of Gastroenterology and Hepatology and Translational Epigenomic Program, Center for Individualized Medicine
| | - Konstantinos A Papadakis
- From the Epigenetics and Chromatin Dynamics Laboratory, Division of Gastroenterology and Hepatology and Translational Epigenomic Program, Center for Individualized Medicine
| | - Goel Gautam
- the Gastrointestinal Unit and Center for the Study of Inflammatory Bowel Disease, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, and
- the Center for Computational and Integrative Biology, The Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142
| | - Ramnik J Xavier
- the Gastrointestinal Unit and Center for the Study of Inflammatory Bowel Disease, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, and
- the Center for Computational and Integrative Biology, The Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142
| | - Raul A Urrutia
- From the Epigenetics and Chromatin Dynamics Laboratory, Division of Gastroenterology and Hepatology and Translational Epigenomic Program, Center for Individualized Medicine
| | - William A Faubion
- From the Epigenetics and Chromatin Dynamics Laboratory, Division of Gastroenterology and Hepatology and Translational Epigenomic Program, Center for Individualized Medicine,
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77
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Chen X, Hao A, Li X, Du Z, Li H, Wang H, Yang H, Fang Z. Melatonin inhibits tumorigenicity of glioblastoma stem-like cells via the AKT-EZH2-STAT3 signaling axis. J Pineal Res 2016; 61:208-17. [PMID: 27121240 DOI: 10.1111/jpi.12341] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2016] [Accepted: 04/26/2016] [Indexed: 01/10/2023]
Abstract
Glioblastoma stem-like cells (GSCs) displaying self-renewing and tumor-propagating capacity play a particularly important role in maintaining tumor growth, therapeutic resistance, and tumor recurrence. Therefore, new therapeutic strategies focusing on impairing GSC maintenance are urgently needed. Here, we used GSCs isolated from surgical specimens from patients with glioblastoma multiforme (GBM) to study the roles and underlying mechanisms associated with melatonin in GSC biology. The results showed that melatonin directly targeted glioma tumor cells by altering GSC biology and inhibiting GSC proliferation. Additionally, melatonin altered profile of transcription factors to inhibit tumor initiation and propagation. Furthermore, EZH2 S21 phosphorylation and EZH2-STAT3 interaction in GSCs were impaired following melatonin treatment. These results suggested that melatonin attenuated multiple key signals involved in GSC self-renewal and survival, and further supported melatonin as a promising GBM therapeutic.
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Affiliation(s)
- Xueran Chen
- Center of Medical Physics and Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui, China
- Cancer Hospital, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui, China
| | - Aijun Hao
- Department of Histology and Embryology, Key Laboratory of the Ministry of Education for Experimental Teratology, Shandong University School of Medicine, Jinan, Shandong, China
| | - Xian Li
- Department of Histology and Embryology, Key Laboratory of the Ministry of Education for Experimental Teratology, Shandong University School of Medicine, Jinan, Shandong, China
| | - Zhaoxia Du
- Department of Histology and Embryology, Key Laboratory of the Ministry of Education for Experimental Teratology, Shandong University School of Medicine, Jinan, Shandong, China
| | - Hao Li
- Center of Medical Physics and Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui, China
| | - Hongzhi Wang
- Center of Medical Physics and Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui, China
- Cancer Hospital, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui, China
| | - Haoran Yang
- Cancer Hospital, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui, China
| | - Zhiyou Fang
- Center of Medical Physics and Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui, China
- Cancer Hospital, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui, China
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78
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Abstract
Background Current studies report that aberrations in epigenetic regulators or chromatin modifications are related to tumor development and maintenance. EZH2 (Enhancer of zeste homolog 2) is one of the catalytic subunits of Polycomb repressive complex 2, a crucial epigenetic regulator. EZH2 has a master regulatory function in such processes as cell proliferation, stem cell differentiation, and early embryogenesis. In humans, EZH2 is linked to oncogenic function in several carcinomas, including breast cancer, and dysregulation of EZH2 has been particularly associated with loss of differentiation and the development of poorly differentiated breast cancer. In our present study, we were interested in determining whether EZH2 is increased in canine mammary tumors, which show similarities to human breast cancer. Results Investigation of the expression of EZH2 in canine mammary tumors revealed that EZH2 protein was overexpressed in canine mammary carcinomas, as in human breast cancer. In addition, the immunohistochemical expression level of EZH2 was associated with the degree of malignancy in canine mammary carcinoma. This is the first report to describe EZH2 expression in canine mammary tumors. Conclusions Because the expression of EZH2 was similar in canine mammary carcinoma and human breast cancer, spontaneous canine mammary tumors may be a suitable model for studying EZH2 and treatment development.
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79
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Calebiro D, Grassi ES, Eszlinger M, Ronchi CL, Godbole A, Bathon K, Guizzardi F, de Filippis T, Krohn K, Jaeschke H, Schwarzmayr T, Bircan R, Gozu HI, Sancak S, Niedziela M, Strom TM, Fassnacht M, Persani L, Paschke R. Recurrent EZH1 mutations are a second hit in autonomous thyroid adenomas. J Clin Invest 2016; 126:3383-8. [PMID: 27500488 DOI: 10.1172/jci84894] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Accepted: 06/16/2016] [Indexed: 12/22/2022] Open
Abstract
Autonomous thyroid adenomas (ATAs) are a frequent cause of hyperthyroidism. Mutations in the genes encoding the TSH receptor (TSHR) or the Gs protein α subunit (GNAS) are found in approximately 70% of ATAs. The involvement of other genes and the pathogenesis of the remaining cases are presently unknown. Here, we performed whole-exome sequencing in 19 ATAs that were paired with normal DNA samples and identified a recurrent hot-spot mutation (c.1712A>G; p.Gln571Arg) in the enhancer of zeste homolog 1 (EZH1) gene, which codes for a catalytic subunit of the polycomb complex. Targeted screening in an independent cohort confirmed that this mutation occurs with high frequency (27%) in ATAs. EZH1 mutations were strongly associated with known (TSHR, GNAS) or presumed (adenylate cyclase 9 [ADCY9]) alterations in cAMP pathway genes. Furthermore, functional studies revealed that the p.Gln571Arg EZH1 mutation caused increased histone H3 trimethylation and increased proliferation of thyroid cells. In summary, this study revealed that a hot-spot mutation in EZH1 is the second most frequent genetic alteration in ATAs. The association between EZH1 and TSHR mutations suggests a 2-hit model for the pathogenesis of these tumors, whereby constitutive activation of the cAMP pathway and EZH1 mutations cooperate to induce the hyperproliferation of thyroid cells.
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80
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Li Z, Shen J, Chan MTV, Wu WKK. TUG1: a pivotal oncogenic long non-coding RNA of human cancers. Cell Prolif 2016; 49:471-5. [PMID: 27339553 DOI: 10.1111/cpr.12269] [Citation(s) in RCA: 183] [Impact Index Per Article: 22.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Accepted: 04/28/2016] [Indexed: 12/14/2022] Open
Abstract
Long non-coding RNAs (lncRNAs) are a group greater than 200 nucleotides in length. An increasing number of studies has shown that lncRNAs play important roles in diverse cellular processes, including proliferation, differentiation, apoptosis, invasion and chromatin remodelling. In this regard, deregulation of lncRNAs has been documented in human cancers. TUG1 is a recently identified oncogenic lncRNA whose aberrant upregulation has been detected in different types of cancer, including B-cell malignancies, oesophageal squamous cell carcinoma, bladder cancer, hepatocellular carcinoma and osteosarcoma. In these malignancies, knock-down of TUG1 has been shown to suppress cell proliferation, invasion and/or colony formation. Interestingly, TUG1 has been found to be downregulated in non-small cell lung carcinoma, indicative of its tissue-specific function in tumourigenesis. Pertinent to clinical practice, TUG1 may act as a prognostic biomarker for tumours. In this review, we summarize current knowledge concerning the role of TUG1 in tumour progression and discuss mechanisms associated with it.
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Affiliation(s)
- Zheng Li
- Department of Orthopedics Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100042, China
| | - Jianxiong Shen
- Department of Orthopedics Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100042, China
| | - Matthew T V Chan
- Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Hong Kong, China
| | - William Ka Kei Wu
- Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Hong Kong, China.,State Key Laboratory of Digestive Disease, LKS Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong, China
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81
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Duncan VE, Ping Z, Varambally S, Peker D. Loss of RUNX3 expression is an independent adverse prognostic factor in diffuse large B-cell lymphoma. Leuk Lymphoma 2016; 58:179-184. [DOI: 10.1080/10428194.2016.1180686] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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82
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Brooun A, Gajiwala KS, Deng YL, Liu W, Bolaños B, Bingham P, He YA, Diehl W, Grable N, Kung PP, Sutton S, Maegley KA, Yu X, Stewart AE. Polycomb repressive complex 2 structure with inhibitor reveals a mechanism of activation and drug resistance. Nat Commun 2016; 7:11384. [PMID: 27122193 PMCID: PMC4853478 DOI: 10.1038/ncomms11384] [Citation(s) in RCA: 121] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Accepted: 03/21/2016] [Indexed: 12/13/2022] Open
Abstract
Polycomb repressive complex 2 (PRC2) mediates gene silencing through chromatin reorganization by methylation of histone H3 lysine 27 (H3K27). Overexpression of the complex and point mutations in the individual subunits of PRC2 have been shown to contribute to tumorigenesis. Several inhibitors of the PRC2 activity have shown efficacy in EZH2-mutated lymphomas and are currently in clinical development, although the molecular basis of inhibitor recognition remains unknown. Here we report the crystal structures of the inhibitor-bound wild-type and Y641N PRC2. The structures illuminate an important role played by a stretch of 17 residues in the N-terminal region of EZH2, we call the activation loop, in the stimulation of the enzyme activity, inhibitor recognition and the potential development of the mutation-mediated drug resistance. The work presented here provides new avenues for the design and development of next-generation PRC2 inhibitors through establishment of a structure-based drug design platform.
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Affiliation(s)
- Alexei Brooun
- Worldwide Medicinal Chemistry, Worldwide Research and Development, Pfizer Inc., San Diego, California 92121, USA
| | - Ketan S Gajiwala
- Worldwide Medicinal Chemistry, Worldwide Research and Development, Pfizer Inc., San Diego, California 92121, USA
| | - Ya-Li Deng
- Worldwide Medicinal Chemistry, Worldwide Research and Development, Pfizer Inc., San Diego, California 92121, USA
| | - Wei Liu
- Worldwide Medicinal Chemistry, Worldwide Research and Development, Pfizer Inc., San Diego, California 92121, USA
| | - Ben Bolaños
- Worldwide Medicinal Chemistry, Worldwide Research and Development, Pfizer Inc., San Diego, California 92121, USA
| | - Patrick Bingham
- Oncology Research Unit, Worldwide Research and Development, Pfizer Inc., San Diego, California 92121, USA
| | - You-Ai He
- Worldwide Medicinal Chemistry, Worldwide Research and Development, Pfizer Inc., San Diego, California 92121, USA
| | - Wade Diehl
- Worldwide Medicinal Chemistry, Worldwide Research and Development, Pfizer Inc., San Diego, California 92121, USA
| | - Nicole Grable
- Worldwide Medicinal Chemistry, Worldwide Research and Development, Pfizer Inc., San Diego, California 92121, USA
| | - Pei-Pei Kung
- Worldwide Medicinal Chemistry, Worldwide Research and Development, Pfizer Inc., San Diego, California 92121, USA
| | - Scott Sutton
- Worldwide Medicinal Chemistry, Worldwide Research and Development, Pfizer Inc., San Diego, California 92121, USA
| | - Karen A Maegley
- Oncology Research Unit, Worldwide Research and Development, Pfizer Inc., San Diego, California 92121, USA
| | - Xiu Yu
- Worldwide Medicinal Chemistry, Worldwide Research and Development, Pfizer Inc., San Diego, California 92121, USA
| | - Al E Stewart
- Worldwide Medicinal Chemistry, Worldwide Research and Development, Pfizer Inc., San Diego, California 92121, USA
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83
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Yen CY, Huang HW, Shu CW, Hou MF, Yuan SSF, Wang HR, Chang YT, Farooqi AA, Tang JY, Chang HW. DNA methylation, histone acetylation and methylation of epigenetic modifications as a therapeutic approach for cancers. Cancer Lett 2016; 373:185-92. [DOI: 10.1016/j.canlet.2016.01.036] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Revised: 12/23/2015] [Accepted: 01/18/2016] [Indexed: 02/09/2023]
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84
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Walsh L, Gallagher WM, O’Connor DP, Ní Chonghaile T. Diagnostic and Therapeutic Implications of Histone Epigenetic Modulators in Breast Cancer. Expert Rev Mol Diagn 2016; 16:541-51. [DOI: 10.1586/14737159.2016.1156534] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Louise Walsh
- Department of Molecular and Cellular Therapeutics, Royal College of Surgeons in Ireland, Dublin 2, Ireland
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin 2, Ireland
| | - William M. Gallagher
- Cancer Biology and Therapeutics Laboratory, UCD School of Biomolecular and Biomedical Science, UCD Conway Institute, University College Dublin, Dublin 4, Ireland
- OncoMark Limited, NovaUCD, Belfield Innovation Park, Belfield, Dublin 4, Ireland
| | - Darran P. O’Connor
- Department of Molecular and Cellular Therapeutics, Royal College of Surgeons in Ireland, Dublin 2, Ireland
| | - Tríona Ní Chonghaile
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin 2, Ireland
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85
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Hou HA, Tien HF. Mutations in epigenetic modifiers in acute myeloid leukemia and their clinical utility. Expert Rev Hematol 2016; 9:447-69. [DOI: 10.1586/17474086.2016.1144469] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Hsin-An Hou
- Division of Hematology, Department of Internal Medicine, National Taiwan University Hospital, National Taiwan University, Taipei, Taiwan
| | - Hwei-Fang Tien
- Division of Hematology, Department of Internal Medicine, National Taiwan University Hospital, National Taiwan University, Taipei, Taiwan
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86
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Gelato KA, Shaikhibrahim Z, Ocker M, Haendler B. Targeting epigenetic regulators for cancer therapy: modulation of bromodomain proteins, methyltransferases, demethylases, and microRNAs. Expert Opin Ther Targets 2016; 20:783-99. [DOI: 10.1517/14728222.2016.1134490] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
| | | | - Matthias Ocker
- Global Drug Discovery, Bayer Pharma AG, Berlin, Germany
- Department of Gastroenterology/Campus Benjamin Franklin, Charité-Universitätsmedizin Berlin, Berlin, Germany
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