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Filograna A, De Tito S, Monte ML, Oliva R, Bruzzese F, Roca MS, Zannetti A, Greco A, Spano D, Ayala I, Liberti A, Petraccone L, Dathan N, Catara G, Schembri L, Colanzi A, Budillon A, Beccari AR, Del Vecchio P, Luini A, Corda D, Valente C. Identification and characterization of a new potent inhibitor targeting CtBP1/BARS in melanoma cells. J Exp Clin Cancer Res 2024; 43:137. [PMID: 38711119 PMCID: PMC11071220 DOI: 10.1186/s13046-024-03044-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Accepted: 04/10/2024] [Indexed: 05/08/2024] Open
Abstract
BACKGROUND The C-terminal-binding protein 1/brefeldin A ADP-ribosylation substrate (CtBP1/BARS) acts both as an oncogenic transcriptional co-repressor and as a fission inducing protein required for membrane trafficking and Golgi complex partitioning during mitosis, hence for mitotic entry. CtBP1/BARS overexpression, in multiple cancers, has pro-tumorigenic functions regulating gene networks associated with "cancer hallmarks" and malignant behavior including: increased cell survival, proliferation, migration/invasion, epithelial-mesenchymal transition (EMT). Structurally, CtBP1/BARS belongs to the hydroxyacid-dehydrogenase family and possesses a NAD(H)-binding Rossmann fold, which, depending on ligands bound, controls the oligomerization of CtBP1/BARS and, in turn, its cellular functions. Here, we proposed to target the CtBP1/BARS Rossmann fold with small molecules as selective inhibitors of mitotic entry and pro-tumoral transcriptional activities. METHODS Structured-based screening of drug databases at different development stages was applied to discover novel ligands targeting the Rossmann fold. Among these identified ligands, N-(3,4-dichlorophenyl)-4-{[(4-nitrophenyl)carbamoyl]amino}benzenesulfonamide, called Comp.11, was selected for further analysis. Fluorescence spectroscopy, isothermal calorimetry, computational modelling and site-directed mutagenesis were employed to define the binding of Comp.11 to the Rossmann fold. Effects of Comp.11 on the oligomerization state, protein partners binding and pro-tumoral activities were evaluated by size-exclusion chromatography, pull-down, membrane transport and mitotic entry assays, Flow cytometry, quantitative real-time PCR, motility/invasion, and colony assays in A375MM and B16F10 melanoma cell lines. Effects of Comp.11 on tumor growth in vivo were analyzed in mouse tumor model. RESULTS We identify Comp.11 as a new, potent and selective inhibitor of CtBP1/BARS (but not CtBP2). Comp.11 directly binds to the CtBP1/BARS Rossmann fold affecting the oligomerization state of the protein (unlike other known CtBPs inhibitors), which, in turn, hinders interactions with relevant partners, resulting in the inhibition of both CtBP1/BARS cellular functions: i) membrane fission, with block of mitotic entry and cellular secretion; and ii) transcriptional pro-tumoral effects with significantly hampered proliferation, EMT, migration/invasion, and colony-forming capabilities. The combination of these effects impairs melanoma tumor growth in mouse models. CONCLUSIONS: This study identifies a potent and selective inhibitor of CtBP1/BARS active in cellular and melanoma animal models revealing new opportunities to study the role of CtBP1/BARS in tumor biology and to develop novel melanoma treatments.
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Affiliation(s)
- Angela Filograna
- Institute of Experimental Endocrinology and Oncology "G. Salvatore"(IEOS), National Research Council (CNR), 80131, Naples, Italy
| | - Stefano De Tito
- Molecular Cell Biology of Autophagy, The Francis Crick Institute, London, UK. The Study Has Been Previously Performed at IEOS-CNR, Naples, Italy
| | - Matteo Lo Monte
- Institute of Experimental Endocrinology and Oncology "G. Salvatore"(IEOS), National Research Council (CNR), 80131, Naples, Italy
| | - Rosario Oliva
- Department of Chemical Sciences, University of Naples Federico II, 80126, Naples, Italy
| | - Francesca Bruzzese
- Animal Facility Unit, Istituto Nazionale Tumori-IRCCS-Fondazione G. Pascale, 80131, Naples, Italy
| | - Maria Serena Roca
- Experimental Pharmacology Unit, Istituto Nazionale Tumori-IRCCS-Fondazione G. Pascale, Naples, 80131, Italy
| | - Antonella Zannetti
- Institute of Biostructures and Bioimaging (IBB), National Research Council (CNR), Naples, 80145, Italy
| | - Adelaide Greco
- Interdepartmental Service Center of Veterinary Radiology, University of Naples Federico II, 80137, Naples, Italy
| | - Daniela Spano
- Institute of Experimental Endocrinology and Oncology "G. Salvatore"(IEOS), National Research Council (CNR), 80131, Naples, Italy
| | - Inmaculada Ayala
- Institute of Experimental Endocrinology and Oncology "G. Salvatore"(IEOS), National Research Council (CNR), 80131, Naples, Italy
| | - Assunta Liberti
- National Research Council (CNR), Piazzale Aldo Moro, 700185, Rome, Italy
- Biology and Evolution of Marine Organisms (BEOM), Stazione Zoologica Anton Dohrn, Naples, Italy
| | - Luigi Petraccone
- Department of Chemical Sciences, University of Naples Federico II, 80126, Naples, Italy
| | - Nina Dathan
- Institute of Experimental Endocrinology and Oncology "G. Salvatore"(IEOS), National Research Council (CNR), 80131, Naples, Italy
| | - Giuliana Catara
- Institute of Biochemistry and Cell Biology, National Research Council (CNR), 80131, Naples, Italy
| | - Laura Schembri
- National Research Council (CNR), Piazzale Aldo Moro, 700185, Rome, Italy
- Department of Pharmacy, University of Naples Federico II, 80131, Naples, Italy
| | - Antonino Colanzi
- Institute of Experimental Endocrinology and Oncology "G. Salvatore"(IEOS), National Research Council (CNR), 80131, Naples, Italy
| | - Alfredo Budillon
- Scientific Directorate, Istituto Nazionale Tumori-IRCCS-Fondazione G. Pascale, 80131, Naples, Italy
| | | | - Pompea Del Vecchio
- Department of Chemical Sciences, University of Naples Federico II, 80126, Naples, Italy
| | - Alberto Luini
- Institute of Experimental Endocrinology and Oncology "G. Salvatore"(IEOS), National Research Council (CNR), 80131, Naples, Italy
| | - Daniela Corda
- Institute of Experimental Endocrinology and Oncology "G. Salvatore"(IEOS), National Research Council (CNR), 80131, Naples, Italy.
| | - Carmen Valente
- Institute of Experimental Endocrinology and Oncology "G. Salvatore"(IEOS), National Research Council (CNR), 80131, Naples, Italy.
- Present address: Dompé Farmaceutici S.P.A, L'Aquila, Italy.
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2
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Rangel N, Sánchez IL, Valbuena DS, Rondón-Lagos M. ZNF217 Gene Copy Number as a Marker of Response to Standard Therapy Drugs According to ERα Status in Breast Cancer. BREAST CANCER (DOVE MEDICAL PRESS) 2024; 16:127-139. [PMID: 38505863 PMCID: PMC10950081 DOI: 10.2147/bctt.s445753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Accepted: 01/24/2024] [Indexed: 03/21/2024]
Abstract
Purpose The therapeutic decision for the management of breast cancer (BC) patients is based on the evaluation of prognostic factors alongside clinical and pathological parameters. Despite the use of standard biomarkers, response and resistance to therapy represent a challenge for clinicians. Among the new potential biomarkers for BC the ZNF217 gene have gained importance in recent years. However, while associations between ZNF217 gene copy number and clinicopathological characteristics have been established, its correlation with treatment response remains unclear. Patients and Methods This study aimed to evaluate the ZNF217 gene copy number and establish its associations with treatment response in estrogen receptor positive (ERα+) and ERα negative (ERα-) BC cell lines. In addition, a validation of the relationship between ZNF217 gene copy number and its prognostic value was performed using datasets of BC patients retrieved from the cBioPortal public database. Results Our data show that in ERα+ cells, ZNF217 gene copy number increase (amplification), while cell proliferation decreases in response to standard drug treatments. In contrast, both ZNF217 gene copy number (gain) and cell proliferation increases in response to standard drug treatments in ERα- cells. The results obtained align with findings from the cBioPortal database analysis, demonstrating that ERα+/HER2- low proliferation patients, exhibiting ZNF217 gene amplification or gain, have a significantly higher survival probability after treatment, compared to ERα-/HER2- and HER2+ patients. Conclusion Our results suggest that in ERα+ BC cells, ZNF217 gene amplification could be indicative of a favorable response, while in ERα- BC cells, ZNF217 gene gain could be postulated as a potential predictor of treatment resistance. A broader understanding of the role of ZNF217 gene in treatment response, together with prospective studies in BC patients, could contribute to confirming our data, as well as optimizing existing treatments and exploring novel approaches to improve overall cancer treatment outcomes.
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Affiliation(s)
- Nelson Rangel
- Departamento de Nutrición y Bioquímica, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá, 110231, Colombia
| | - Iris Lorena Sánchez
- School of Biological Sciences, Universidad Pedagógica Y Tecnológica de Colombia, Tunja, 150003, Colombia
| | - Duván Sebastián Valbuena
- School of Biological Sciences, Universidad Pedagógica Y Tecnológica de Colombia, Tunja, 150003, Colombia
| | - Milena Rondón-Lagos
- School of Biological Sciences, Universidad Pedagógica Y Tecnológica de Colombia, Tunja, 150003, Colombia
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3
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Mamedov MR, Vedova S, Freimer JW, Sahu AD, Ramesh A, Arce MM, Meringa AD, Ota M, Chen PA, Hanspers K, Nguyen VQ, Takeshima KA, Rios AC, Pritchard JK, Kuball J, Sebestyen Z, Adams EJ, Marson A. CRISPR screens decode cancer cell pathways that trigger γδ T cell detection. Nature 2023; 621:188-195. [PMID: 37648854 PMCID: PMC11003766 DOI: 10.1038/s41586-023-06482-x] [Citation(s) in RCA: 25] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Accepted: 07/26/2023] [Indexed: 09/01/2023]
Abstract
γδ T cells are potent anticancer effectors with the potential to target tumours broadly, independent of patient-specific neoantigens or human leukocyte antigen background1-5. γδ T cells can sense conserved cell stress signals prevalent in transformed cells2,3, although the mechanisms behind the targeting of stressed target cells remain poorly characterized. Vγ9Vδ2 T cells-the most abundant subset of human γδ T cells4-recognize a protein complex containing butyrophilin 2A1 (BTN2A1) and BTN3A1 (refs. 6-8), a widely expressed cell surface protein that is activated by phosphoantigens abundantly produced by tumour cells. Here we combined genome-wide CRISPR screens in target cancer cells to identify pathways that regulate γδ T cell killing and BTN3A cell surface expression. The screens showed previously unappreciated multilayered regulation of BTN3A abundance on the cell surface and triggering of γδ T cells through transcription, post-translational modifications and membrane trafficking. In addition, diverse genetic perturbations and inhibitors disrupting metabolic pathways in the cancer cells, particularly ATP-producing processes, were found to alter BTN3A levels. This induction of both BTN3A and BTN2A1 during metabolic crises is dependent on AMP-activated protein kinase (AMPK). Finally, small-molecule activation of AMPK in a cell line model and in patient-derived tumour organoids led to increased expression of the BTN2A1-BTN3A complex and increased Vγ9Vδ2 T cell receptor-mediated killing. This AMPK-dependent mechanism of metabolic stress-induced ligand upregulation deepens our understanding of γδ T cell stress surveillance and suggests new avenues available to enhance γδ T cell anticancer activity.
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Affiliation(s)
- Murad R. Mamedov
- Gladstone-UCSF Institute of Genomic Immunology, San Francisco, CA, USA
- Department of Medicine, University of California, San Francisco, San Francisco, CA, USA
| | - Shane Vedova
- Gladstone-UCSF Institute of Genomic Immunology, San Francisco, CA, USA
- Department of Medicine, University of California, San Francisco, San Francisco, CA, USA
| | - Jacob W. Freimer
- Gladstone-UCSF Institute of Genomic Immunology, San Francisco, CA, USA
- Department of Medicine, University of California, San Francisco, San Francisco, CA, USA
- Department of Genetics, Stanford University, Stanford, CA, USA
| | - Avinash Das Sahu
- Department of Data Science, Dana-Farber Cancer Institute, Boston, MA, USA
- Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, MA, USA
- UNM Comprehensive Cancer Center, University of New Mexico, Albuquerque, NM, USA
| | - Amrita Ramesh
- Department of Biochemistry and Molecular Biology, University of Chicago, Chicago, IL, USA
| | - Maya M. Arce
- Gladstone-UCSF Institute of Genomic Immunology, San Francisco, CA, USA
- Department of Medicine, University of California, San Francisco, San Francisco, CA, USA
| | - Angelo D. Meringa
- Center for Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, the Netherlands
| | - Mineto Ota
- Gladstone-UCSF Institute of Genomic Immunology, San Francisco, CA, USA
- Department of Medicine, University of California, San Francisco, San Francisco, CA, USA
- Department of Genetics, Stanford University, Stanford, CA, USA
| | - Peixin Amy Chen
- Gladstone-UCSF Institute of Genomic Immunology, San Francisco, CA, USA
- Department of Medicine, University of California, San Francisco, San Francisco, CA, USA
| | - Kristina Hanspers
- Institute of Data Science and Biotechnology, Gladstone Institutes, San Francisco, CA, USA
| | - Vinh Q. Nguyen
- Gladstone-UCSF Institute of Genomic Immunology, San Francisco, CA, USA
- Department of Surgery, University of California, San Francisco, San Francisco, CA, USA
- Diabetes Center, University of California, San Francisco, San Francisco, CA, USA
- UCSF CoLabs, University of California, San Francisco, San Francisco, CA, USA
| | | | - Anne C. Rios
- Princess Máxima Center for Pediatric Oncology, Utrecht, the Netherlands
- Oncode Institute, Utrecht, the Netherlands
| | - Jonathan K. Pritchard
- Department of Genetics, Stanford University, Stanford, CA, USA
- Department of Biology, Stanford University, Stanford, CA, USA
| | - Jürgen Kuball
- Center for Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, the Netherlands
- Department of Hematology, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Zsolt Sebestyen
- Center for Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, the Netherlands
| | - Erin J. Adams
- Department of Biochemistry and Molecular Biology, University of Chicago, Chicago, IL, USA
- Committee on Immunology, University of Chicago, Chicago, IL, USA
| | - Alexander Marson
- Gladstone-UCSF Institute of Genomic Immunology, San Francisco, CA, USA
- Department of Medicine, University of California, San Francisco, San Francisco, CA, USA
- Diabetes Center, University of California, San Francisco, San Francisco, CA, USA
- Department of Microbiology and Immunology, University of California, San Francisco, San Francisco, CA, USA
- Innovative Genomics Institute, University of California-Berkeley, Berkeley, CA, USA
- UCSF Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, San Francisco, CA, USA
- Parker Institute for Cancer Immunotherapy, University of California, San Francisco, San Francisco, CA, USA
- Institute for Human Genetics, University of California, San Francisco, San Francisco, CA, USA
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4
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Raicu AM, Kadiyala D, Niblock M, Jain A, Yang Y, Bird KM, Bertholf K, Seenivasan A, Siddiq M, Arnosti DN. The Cynosure of CtBP: Evolution of a Bilaterian Transcriptional Corepressor. Mol Biol Evol 2023; 40:msad003. [PMID: 36625090 PMCID: PMC9907507 DOI: 10.1093/molbev/msad003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 12/16/2022] [Accepted: 01/03/2023] [Indexed: 01/11/2023] Open
Abstract
Evolution of sequence-specific transcription factors clearly drives lineage-specific innovations, but less is known about how changes in the central transcriptional machinery may contribute to evolutionary transformations. In particular, transcriptional regulators are rich in intrinsically disordered regions that appear to be magnets for evolutionary innovation. The C-terminal Binding Protein (CtBP) is a transcriptional corepressor derived from an ancestral lineage of alpha hydroxyacid dehydrogenases; it is found in mammals and invertebrates, and features a core NAD-binding domain as well as an unstructured C-terminus (CTD) of unknown function. CtBP can act on promoters and enhancers to repress transcription through chromatin-linked mechanisms. Our comparative phylogenetic study shows that CtBP is a bilaterian innovation whose CTD of about 100 residues is present in almost all orthologs. CtBP CTDs contain conserved blocks of residues and retain a predicted disordered property, despite having variations in the primary sequence. Interestingly, the structure of the C-terminus has undergone radical transformation independently in certain lineages including flatworms and nematodes. Also contributing to CTD diversity is the production of myriad alternative RNA splicing products, including the production of "short" tailless forms of CtBP in Drosophila. Additional diversity stems from multiple gene duplications in vertebrates, where up to five CtBP orthologs have been observed. Vertebrate lineages show fewer major modifications in the unstructured CTD, possibly because gene regulatory constraints of the vertebrate body plan place specific constraints on this domain. Our study highlights the rich regulatory potential of this previously unstudied domain of a central transcriptional regulator.
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Affiliation(s)
- Ana-Maria Raicu
- Cell and Molecular Biology Program, Michigan State University, East Lansing, Michigan
| | - Dhruva Kadiyala
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan
| | - Madeline Niblock
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan
| | | | - Yahui Yang
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan
| | - Kalynn M Bird
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan
| | - Kayla Bertholf
- Biochemistry and Molecular Biology Program, College of Wooster
| | - Akshay Seenivasan
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan
| | - Mohammad Siddiq
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, Michigan
- Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, Michigan
| | - David N Arnosti
- Cell and Molecular Biology Program, Michigan State University, East Lansing, Michigan
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan
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5
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The Intricate Interplay between the ZNF217 Oncogene and Epigenetic Processes Shapes Tumor Progression. Cancers (Basel) 2022; 14:cancers14246043. [PMID: 36551531 PMCID: PMC9776013 DOI: 10.3390/cancers14246043] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 12/02/2022] [Accepted: 12/05/2022] [Indexed: 12/14/2022] Open
Abstract
The oncogenic transcription factor ZNF217 orchestrates several molecular signaling networks to reprogram integrated circuits governing hallmark capabilities within cancer cells. High levels of ZNF217 expression provide advantages to a specific subset of cancer cells to reprogram tumor progression, drug resistance and cancer cell plasticity. ZNF217 expression level, thus, provides a powerful biomarker of poor prognosis and a predictive biomarker for anticancer therapies. Cancer epigenetic mechanisms are well known to support the acquisition of hallmark characteristics during oncogenesis. However, the complex interactions between ZNF217 and epigenetic processes have been poorly appreciated. Deregulated DNA methylation status at ZNF217 locus or an intricate cross-talk between ZNF217 and noncoding RNA networks could explain aberrant ZNF217 expression levels in a cancer cell context. On the other hand, the ZNF217 protein controls gene expression signatures and molecular signaling for tumor progression by tuning DNA methylation status at key promoters by interfering with noncoding RNAs or by refining the epitranscriptome. Altogether, this review focuses on the recent advances in the understanding of ZNF217 collaboration with epigenetics processes to orchestrate oncogenesis. We also discuss the exciting burgeoning translational medicine and candidate therapeutic strategies emerging from those recent findings connecting ZNF217 to epigenetic deregulation in cancer.
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6
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Herbert A, Fedorov A, Poptsova M. Mono a Mano: ZBP1’s Love–Hate Relationship with the Kissing Virus. Int J Mol Sci 2022; 23:ijms23063079. [PMID: 35328502 PMCID: PMC8955656 DOI: 10.3390/ijms23063079] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 02/24/2022] [Accepted: 03/09/2022] [Indexed: 12/27/2022] Open
Abstract
Z-DNA binding protein (ZBP1) very much represents the nuclear option. By initiating inflammatory cell death (ICD), ZBP1 activates host defenses to destroy infectious threats. ZBP1 is also able to induce noninflammatory regulated cell death via apoptosis (RCD). ZBP1 senses the presence of left-handed Z-DNA and Z-RNA (ZNA), including that formed by expression of endogenous retroelements. Viruses such as the Epstein–Barr “kissing virus” inhibit ICD, RCD and other cell death signaling pathways to produce persistent infection. EBV undergoes lytic replication in plasma cells, which maintain detectable levels of basal ZBP1 expression, leading us to suggest a new role for ZBP1 in maintaining EBV latency, one of benefit for both host and virus. We provide an overview of the pathways that are involved in establishing latent infection, including those regulated by MYC and NF-κB. We describe and provide a synthesis of the evidence supporting a role for ZNA in these pathways, highlighting the positive and negative selection of ZNA forming sequences in the EBV genome that underscores the coadaptation of host and virus. Instead of a fight to the death, a state of détente now exists where persistent infection by the virus is tolerated by the host, while disease outcomes such as death, autoimmunity and cancer are minimized. Based on these new insights, we propose actionable therapeutic approaches to unhost EBV.
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Affiliation(s)
- Alan Herbert
- InsideOutBio, 42 8th Street, Charlestown, MA 02129, USA
- Laboratory of Bioinformatics, Faculty of Computer Science, National Research University Higher School of Economics, 11 Pokrovsky Bulvar, 101000 Moscow, Russia; (A.F.); (M.P.)
- Correspondence:
| | - Aleksandr Fedorov
- Laboratory of Bioinformatics, Faculty of Computer Science, National Research University Higher School of Economics, 11 Pokrovsky Bulvar, 101000 Moscow, Russia; (A.F.); (M.P.)
| | - Maria Poptsova
- Laboratory of Bioinformatics, Faculty of Computer Science, National Research University Higher School of Economics, 11 Pokrovsky Bulvar, 101000 Moscow, Russia; (A.F.); (M.P.)
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7
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Aoyagi T, Yoshino R, Mitsuta Y, Morita R, Harada R, Shigeta Y. Integrated In Silico Studies on the Role of Nicotinamide Adenine Dinucleotide (NADH) Binding in Activating C-Terminal Binding Protein 2 (CtBP2). CHEM LETT 2022. [DOI: 10.1246/cl.210548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Tsukasa Aoyagi
- Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571, Japan
| | - Ryunosuke Yoshino
- Transborder Medical Research Center, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
- Center for Computational Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
| | - Yuki Mitsuta
- Center for Computational Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Rikuri Morita
- Center for Computational Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
| | - Ryuhei Harada
- Center for Computational Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
| | - Yasuteru Shigeta
- Center for Computational Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
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8
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Li Y, Wu H, Wang Q, Xu S. ZNF217: the cerberus who fails to guard the gateway to lethal malignancy. Am J Cancer Res 2021; 11:3378-3405. [PMID: 34354851 PMCID: PMC8332857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Accepted: 05/14/2021] [Indexed: 06/13/2023] Open
Abstract
The aberrant expression of the zinc finger protein 217 (ZNF217) promotes multiple malignant phenotypes, such as replicative immortality, maintenance of proliferation, malignant heterogeneity, metastasis, and cell death resistance, via diverse mechanisms, including transcriptional activation, mRNA N6-methyladenosine (m6A) regulation, and protein interactions. The induction of these cellular processes by ZNF217 leads to therapeutic resistance and patients' poor outcomes. However, few ZNF217 related clinical applications or trials, have been reported. Moreover, looming observations about ZNF217 roles in m6A regulation and cancer immune response triggered significant attention while lacking critical evidence. Thus, in this review, we revisit the literature about ZNF217 and emphasize its importance as a prognostic biomarker for early prevention and as a therapeutic target.
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Affiliation(s)
- Yingpu Li
- Department of Breast Surgery, Harbin Medical University Cancer HospitalHarbin, China
| | - Hao Wu
- Sino-Russian Medical Research Center, Harbin Medical University Cancer HospitalHarbin, China
- Heilongjiang Academy of Medical SciencesHarbin, China
| | - Qin Wang
- Department of Breast Surgery, Harbin Medical University Cancer HospitalHarbin, China
- Sino-Russian Medical Research Center, Harbin Medical University Cancer HospitalHarbin, China
- Heilongjiang Academy of Medical SciencesHarbin, China
| | - Shouping Xu
- Department of Breast Surgery, Harbin Medical University Cancer HospitalHarbin, China
- Sino-Russian Medical Research Center, Harbin Medical University Cancer HospitalHarbin, China
- Heilongjiang Academy of Medical SciencesHarbin, China
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9
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Bellanger A, Le DT, Vendrell J, Wierinckx A, Pongor LS, Solassol J, Lachuer J, Clezardin P, Győrffy B, Cohen PA. Exploring the Significance of the Exon 4-Skipping Isoform of the ZNF217 Oncogene in Breast Cancer. Front Oncol 2021; 11:647269. [PMID: 34277402 PMCID: PMC8283766 DOI: 10.3389/fonc.2021.647269] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Accepted: 05/31/2021] [Indexed: 12/30/2022] Open
Abstract
Oncogene alternative splicing events can create distinct functional transcripts that offer new candidate prognostic biomarkers for breast cancer. ZNF217 is a well-established oncogene but its exon 4-skipping isoform (ZNF217-ΔE4) has never been investigated in terms of clinical or biological relevance. Using in silico RNA-seq and RT-qPCR analyses, we demonstrated for the first time the existence of ZNF217-ΔE4 transcripts in primary breast tumors, and a positive correlation between ZNF217-ΔE4 mRNA levels and those of the wild-type oncogene (ZNF217-WT). A pilot retrospective analysis revealed that, in the Luminal subclass, the combination of the two ZNF217 variants (the ZNF217-ΔE4-WT gene-expression signature) provided more information than the mRNA expression levels of each isoform alone. Ectopic overexpression of ZNF217-ΔE4 in breast cancer cells promoted an aggressive phenotype and an increase in ZNF217-WT expression levels that was inversely correlated with DNA methylation of the ZNF217 gene. This study provides new insights into the possible role of the ZNF217-ΔE4 splice variant in breast cancer and suggests a close interplay between the ZNF217-WT and ZNF217-ΔE4 isoforms. Our data suggest that a dual signature combining the expression levels of these two isoforms may serve as a novel prognostic biomarker allowing better stratification of breast cancers with good prognosis and aiding clinicians in therapeutic decisions.
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Affiliation(s)
- Aurélie Bellanger
- Université Lyon 1, Lyon, France.,CRCL-Centre de Recherche en Cancérologie de Lyon-Inserm U1052-CNRS U5286, Lyon, France
| | - Diep T Le
- Université Lyon 1, Lyon, France.,INSERM, UMR1033 LYOS, Lyon, France
| | - Julie Vendrell
- Département de Pathologie et Oncobiologie, Laboratoire de Biologie des Tumeurs Solides, CHU Montpellier, Univ. Montpellier, Montpellier, France
| | - Anne Wierinckx
- Université Lyon 1, Lyon, France.,CRCL-Centre de Recherche en Cancérologie de Lyon-Inserm U1052-CNRS U5286, Lyon, France.,ProfileXpert, SFR-Est, CNRS UMR-S3453, INSERM US7, Lyon, France
| | - Lőrinc S Pongor
- Department of Bioinformatics, Semmelweis University, Budapest, Hungary.,TTK "TermészetTudományi Kutatóközpont" Momentum Cancer Biomarker Research Group, Institute of Enzymology, Budapest, Hungary
| | - Jérôme Solassol
- Département de Pathologie et Oncobiologie, Laboratoire de Biologie des Tumeurs Solides, CHU Montpellier, Univ. Montpellier, Montpellier, France.,Institut de Recherche en Cancérologie de Montpellier (IRCM), INSERM U1194, Univ. Montpellier, Montpellier, France
| | - Joël Lachuer
- Université Lyon 1, Lyon, France.,CRCL-Centre de Recherche en Cancérologie de Lyon-Inserm U1052-CNRS U5286, Lyon, France.,ProfileXpert, SFR-Est, CNRS UMR-S3453, INSERM US7, Lyon, France
| | | | - Balázs Győrffy
- Department of Bioinformatics, Semmelweis University, Budapest, Hungary.,TTK "TermészetTudományi Kutatóközpont" Momentum Cancer Biomarker Research Group, Institute of Enzymology, Budapest, Hungary
| | - Pascale A Cohen
- Université Lyon 1, Lyon, France.,CRCL-Centre de Recherche en Cancérologie de Lyon-Inserm U1052-CNRS U5286, Lyon, France.,INSERM, UMR1033 LYOS, Lyon, France.,ProfileXpert, SFR-Est, CNRS UMR-S3453, INSERM US7, Lyon, France
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10
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The transrepression and transactivation roles of CtBPs in the pathogenesis of different diseases. J Mol Med (Berl) 2021; 99:1335-1347. [PMID: 34196767 DOI: 10.1007/s00109-021-02107-w] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 05/31/2021] [Accepted: 06/25/2021] [Indexed: 02/06/2023]
Abstract
Gene transcription is strictly controlled by transcriptional complexes, which are assemblies of transcription factors, transcriptional regulators, and co-regulators. Mammalian genomes encode two C-terminal-binding proteins (CtBPs), CtBP1 and CtBP2, which are both well-known transcriptional corepressors of oncogenic processes. Their overexpression in tumors is associated with malignant behavior, such as uncontrolled cell proliferation, migration, and invasion, as well as with an increase in the epithelial-mesenchymal transition. CtBPs coordinate with other transcriptional regulators, such as histone deacetylases (HDACs) and histone acetyltransferases (p300 and CBP [CREBP-binding protein]) that contain the PXDLS motif, and with transcription factors to assemble transcriptional complexes that dock onto the promoters of genes to initiate gene transcription. Emerging evidence suggests that CtBPs function as both corepressors and coactivators in different biological processes ranging from apoptosis to inflammation and osteogenesis. Therapeutic targeting of CtBPs or the interactions required to form transcriptional complexes has also shown promising effects in preventing disease progression. This review summarizes the most recent progress in the study of CtBP functions and therapeutic inhibitors in different biological processes. This knowledge may enable a better understanding of the complexity of the roles of CtBPs, while providing new insights into therapeutic strategies that target CtBPs.
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11
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Vissers JHA, Dent LG, House CM, Kondo S, Harvey KF. Pits and CtBP Control Tissue Growth in Drosophila melanogaster with the Hippo Pathway Transcription Repressor Tgi. Genetics 2020; 215:117-128. [PMID: 32122936 PMCID: PMC7198276 DOI: 10.1534/genetics.120.303147] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2019] [Accepted: 03/01/2020] [Indexed: 12/11/2022] Open
Abstract
The Hippo pathway is an evolutionarily conserved signaling network that regulates organ size, cell fate, and tumorigenesis. In the context of organ size control, the pathway incorporates a large variety of cellular cues, such as cell polarity and adhesion, into an integrated transcriptional response. The central Hippo signaling effector is the transcriptional coactivator Yorkie, which controls gene expression in partnership with different transcription factors, most notably Scalloped. When it is not activated by Yorkie, Scalloped can act as a repressor of transcription, at least in part due to its interaction with the corepressor protein Tgi. The mechanism by which Tgi represses transcription is incompletely understood, and therefore we sought to identify proteins that potentially operate together with Tgi. Using an affinity purification and mass-spectrometry approach we identified Pits and CtBP as Tgi-interacting proteins, both of which have been linked to transcriptional repression. Both Pits and CtBP were required for Tgi to suppress the growth of the Drosophila melanogaster eye and CtBP loss suppressed the undergrowth of yorkie mutant eye tissue. Furthermore, as reported previously for Tgi, overexpression of Pits repressed transcription of Hippo pathway target genes. These findings suggest that Tgi might operate together with Pits and CtBP to repress transcription of genes that normally promote tissue growth. The human orthologs of Tgi, CtBP, and Pits (VGLL4, CTBP2, and IRF2BP2) have previously been shown to physically and functionally interact to control transcription, implying that the mechanism by which these proteins control transcriptional repression is conserved throughout evolution.
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Affiliation(s)
- Joseph H A Vissers
- Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia 3000
- Sir Peter MacCallum Department of Oncology, University of Melbourne, Parkville, Victoria, Australia 3010
| | - Lucas G Dent
- Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia 3000
- Sir Peter MacCallum Department of Oncology, University of Melbourne, Parkville, Victoria, Australia 3010
| | - Colin M House
- Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia 3000
- Sir Peter MacCallum Department of Oncology, University of Melbourne, Parkville, Victoria, Australia 3010
| | - Shu Kondo
- Laboratory of Invertebrate Genetics, National Institute of Genetics, Mishima, Shizuoka 411-8540, Japan
| | - Kieran F Harvey
- Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia 3000
- Sir Peter MacCallum Department of Oncology, University of Melbourne, Parkville, Victoria, Australia 3010
- Department of Anatomy and Developmental Biology, and Biomedicine Discovery Institute, Monash University, Clayton, Australia 3800
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12
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Song T, Yang Y, Wei H, Xie X, Lu J, Zeng Q, Peng J, Zhou Y, Jiang S, Peng J. Zfp217 mediates m6A mRNA methylation to orchestrate transcriptional and post-transcriptional regulation to promote adipogenic differentiation. Nucleic Acids Res 2020; 47:6130-6144. [PMID: 31037292 PMCID: PMC6614822 DOI: 10.1093/nar/gkz312] [Citation(s) in RCA: 102] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 04/14/2019] [Accepted: 04/28/2019] [Indexed: 02/06/2023] Open
Abstract
A complex and highly orchestrated gene expression program chiefly establishes the properties that define the adipocyte phenotype, in which the vast majority of factors are involved in transcriptional regulation. However, the mechanisms by post-transcriptional modulation are poorly understood. Here, we showed that zinc finger protein (Zfp217) couples gene transcription to m6A mRNA modification to facilitate adipogenesis. Zfp217 modulates m6A mRNA methylation by activating the transcription of m6A demethylase FTO. Consistently, depletion of Zfp217 compromises adipogenic differentiation of 3T3L1 cells and results in a global increase of m6A modification. Moreover, the interaction of Zfp217 with YTHDF2 is critical for allowing FTO to maintain its interaction with m6A sites on various mRNAs, as loss of Zfp217 leads to FTO decrease and augmented m6A levels. These findings highlight a role for Zfp217-dependent m6A modification to coordinate transcriptional and post-transcriptional regulation and thus promote adipogenic differentiation.
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Affiliation(s)
- Tongxing Song
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.,The Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
| | - Yang Yang
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.,The Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
| | - Hongkui Wei
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.,The Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
| | - Xiaowei Xie
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.,The Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
| | - Jinxin Lu
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.,The Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
| | - Qianhui Zeng
- The Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China.,Key Laboratory of Animal Genetics, Breeding and Reproduction Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Jie Peng
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.,The Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
| | - Yuanfei Zhou
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.,The Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
| | - Siwen Jiang
- The Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China.,Key Laboratory of Animal Genetics, Breeding and Reproduction Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Jian Peng
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.,The Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
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13
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Li H, Zhang C, Yang C, Blevins M, Norris D, Zhao R, Huang M. C-terminal binding proteins 1 and 2 in traumatic brain injury-induced inflammation and their inhibition as an approach for anti-inflammatory treatment. Int J Biol Sci 2020; 16:1107-1120. [PMID: 32174788 PMCID: PMC7053329 DOI: 10.7150/ijbs.42109] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Accepted: 12/29/2019] [Indexed: 01/10/2023] Open
Abstract
Traumatic brain injury (TBI) induces an acute inflammatory response in the central nervous system that involves both resident and peripheral immune cells. The ensuing chronic neuroinflammation causes cell death and tissue damage and may contribute to neurodegeneration. The molecular mechanisms involved in the maintenance of this chronic inflammation state remain underexplored. C-terminal binding protein (CtBP) 1 and 2 are transcriptional coregulators that repress diverse cellular processes. Unexpectedly, we find that the CtBPs can transactivate a common set of proinflammatory genes both in lipopolysaccharide-activated microglia, astrocytes and macrophages, and in a mouse model of the mild form of TBI. We also find that the expression of these genes is markedly enhanced by a single mild injury in both brain and peripheral blood leukocytes in a severity- and time-dependent manner. Moreover, we were able to demonstrate that specific inhibitors of the CtBPs effectively suppress the expression of the CtBP target genes and thus improve neurological outcome in mice receiving single and repeated mild TBIs. This discovery suggests new avenues for therapeutic modulation of the inflammatory response to brain injury.
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Affiliation(s)
- Hong Li
- Department of Dermatology, University of Colorado Anschutz Medical Campus, Aurora CO 80045, USA
| | - Caiguo Zhang
- Department of Dermatology, University of Colorado Anschutz Medical Campus, Aurora CO 80045, USA
| | - Chunxia Yang
- Department of Dermatology, University of Colorado Anschutz Medical Campus, Aurora CO 80045, USA
- Department of Psychiatry, First Hospital of Shanxi Medical University, Taiyuan, China
| | - Melanie Blevins
- Department of Biochemistry and Molecular Genetics, University of Colorado Anschutz Medical Campus, Aurora CO 80045, USA
| | - David Norris
- Department of Dermatology, University of Colorado Anschutz Medical Campus, Aurora CO 80045, USA
| | - Rui Zhao
- Department of Biochemistry and Molecular Genetics, University of Colorado Anschutz Medical Campus, Aurora CO 80045, USA
| | - Mingxia Huang
- Department of Dermatology, University of Colorado Anschutz Medical Campus, Aurora CO 80045, USA
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14
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Liu Q, Zhao Y, Wu R, Jiang Q, Cai M, Bi Z, Liu Y, Yao Y, Feng J, Wang Y, Wang X. ZFP217 regulates adipogenesis by controlling mitotic clonal expansion in a METTL3-m 6A dependent manner. RNA Biol 2019; 16:1785-1793. [PMID: 31434544 DOI: 10.1080/15476286.2019.1658508] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Obesity is becoming a global problem. Research into the detailed mechanism of adipocyte development is crucial for the treatment of excess fat. Zinc finger protein 217 plays roles in adipogenesis. However, the underlying mechanism remains unclear. Here, we demonstrated that ZFP217 knockdown prevented the mitotic clonal expansion process and caused adipogenesis inhibition. Depletion of ZFP217 increased the expression of the m6A methyltransferase METTL3, which upregulated the m6A level of cyclin D1 mRNA. METTL3 knockdown rescued the siZFP217-inhibited MCE and promoted CCND1 expression. YTH domain family 2 recognized and degraded the methylated CCND1 mRNA, leading to the downregulation of CCND1. Consequently, cell-cycle progression was blocked, and adipogenesis was inhibited. YTHDF2 knockdown relieved siZFP217-inhibited adipocyte differentiation. These findings reveal that ZFP217 knockdown-induced adipogenesis inhibition was caused by CCND1, which was mediated by METTL3 and YTHDF2 in an m6A-dependent manner. We have provided novel insight into the underlying molecular mechanisms by which m6A methylation is involved in the ZFP217 regulation of adipogenesis.
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Affiliation(s)
- Qing Liu
- College of Animal Sciences, Zhejiang University, Key Laboratory of Animal Nutrition & Feed Sciences, Ministry of Agriculture, Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Yuanling Zhao
- College of Animal Sciences, Zhejiang University, Key Laboratory of Animal Nutrition & Feed Sciences, Ministry of Agriculture, Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Ruifan Wu
- College of Animal Sciences, Zhejiang University, Key Laboratory of Animal Nutrition & Feed Sciences, Ministry of Agriculture, Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Qin Jiang
- College of Animal Sciences, Zhejiang University, Key Laboratory of Animal Nutrition & Feed Sciences, Ministry of Agriculture, Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Min Cai
- College of Animal Sciences, Zhejiang University, Key Laboratory of Animal Nutrition & Feed Sciences, Ministry of Agriculture, Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Zhen Bi
- College of Animal Sciences, Zhejiang University, Key Laboratory of Animal Nutrition & Feed Sciences, Ministry of Agriculture, Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Youhua Liu
- College of Animal Sciences, Zhejiang University, Key Laboratory of Animal Nutrition & Feed Sciences, Ministry of Agriculture, Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Yongxi Yao
- College of Animal Sciences, Zhejiang University, Key Laboratory of Animal Nutrition & Feed Sciences, Ministry of Agriculture, Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Jie Feng
- College of Animal Sciences, Zhejiang University, Key Laboratory of Animal Nutrition & Feed Sciences, Ministry of Agriculture, Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Yizhen Wang
- College of Animal Sciences, Zhejiang University, Key Laboratory of Animal Nutrition & Feed Sciences, Ministry of Agriculture, Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Xinxia Wang
- College of Animal Sciences, Zhejiang University, Key Laboratory of Animal Nutrition & Feed Sciences, Ministry of Agriculture, Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, Zhejiang, China
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15
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Kwak S, Kim TW, Kang BH, Kim JH, Lee JS, Lee HT, Hwang IY, Shin J, Lee JH, Cho EJ, Youn HD. Zinc finger proteins orchestrate active gene silencing during embryonic stem cell differentiation. Nucleic Acids Res 2019; 46:6592-6607. [PMID: 29846698 PMCID: PMC6061687 DOI: 10.1093/nar/gky454] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Accepted: 05/11/2018] [Indexed: 01/03/2023] Open
Abstract
Transcription factors and chromatin remodeling proteins control the transcriptional variability for ESC lineage commitment. During ESC differentiation, chromatin modifiers are recruited to the regulatory regions by transcription factors, thereby activating the lineage-specific genes or silencing the transcription of active ESC genes. However, the underlying mechanisms that link transcription factors to exit from pluripotency are yet to be identified. In this study, we show that the Ctbp2-interacting zinc finger proteins, Zfp217 and Zfp516, function as linkers for the chromatin regulators during ESC differentiation. CRISPR-Cas9-mediated knock-outs of both Zfp217 and Zfp516 in ESCs prevent the exit from pluripotency. Both zinc finger proteins regulate the Ctbp2-mediated recruitment of the NuRD complex and polycomb repressive complex 2 (PRC2) to active ESC genes, subsequently switching the H3K27ac to H3K27me3 during ESC differentiation for active gene silencing. We therefore suggest that some zinc finger proteins orchestrate to control the concise epigenetic states on active ESC genes during differentiation, resulting in natural lineage commitment.
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Affiliation(s)
- Sojung Kwak
- National Creative Research Center for Epigenome Reprogramming Network, Department of Biomedical Sciences, Ischemic/Hypoxic Disease Institute, Seoul National University College of Medicine, Seoul 03080, Republic of Korea
| | - Tae Wan Kim
- National Creative Research Center for Epigenome Reprogramming Network, Department of Biomedical Sciences, Ischemic/Hypoxic Disease Institute, Seoul National University College of Medicine, Seoul 03080, Republic of Korea
| | - Byung-Hee Kang
- National Creative Research Center for Epigenome Reprogramming Network, Department of Biomedical Sciences, Ischemic/Hypoxic Disease Institute, Seoul National University College of Medicine, Seoul 03080, Republic of Korea
| | - Jae-Hwan Kim
- National Creative Research Center for Epigenome Reprogramming Network, Department of Biomedical Sciences, Ischemic/Hypoxic Disease Institute, Seoul National University College of Medicine, Seoul 03080, Republic of Korea
| | - Jang-Seok Lee
- National Creative Research Center for Epigenome Reprogramming Network, Department of Biomedical Sciences, Ischemic/Hypoxic Disease Institute, Seoul National University College of Medicine, Seoul 03080, Republic of Korea
| | - Han-Teo Lee
- Department of Molecular Medicine & Biopharmaceutical Sciences, Graduate School of Convergence Science, Seoul National University, Seoul 03080, Republic of Korea
| | - In-Young Hwang
- National Creative Research Center for Epigenome Reprogramming Network, Department of Biomedical Sciences, Ischemic/Hypoxic Disease Institute, Seoul National University College of Medicine, Seoul 03080, Republic of Korea
| | - Jihoon Shin
- National Creative Research Center for Epigenome Reprogramming Network, Department of Biomedical Sciences, Ischemic/Hypoxic Disease Institute, Seoul National University College of Medicine, Seoul 03080, Republic of Korea
| | - Jong-Hyuk Lee
- National Creative Research Center for Epigenome Reprogramming Network, Department of Biomedical Sciences, Ischemic/Hypoxic Disease Institute, Seoul National University College of Medicine, Seoul 03080, Republic of Korea
| | - Eun-Jung Cho
- College of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Hong-Duk Youn
- National Creative Research Center for Epigenome Reprogramming Network, Department of Biomedical Sciences, Ischemic/Hypoxic Disease Institute, Seoul National University College of Medicine, Seoul 03080, Republic of Korea.,Department of Molecular Medicine & Biopharmaceutical Sciences, Graduate School of Convergence Science, Seoul National University, Seoul 03080, Republic of Korea
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16
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Association of Single-Nucleotide Polymorphism REX1 rs6815391, OCT4 rs13409 or rs3130932, and CTBP2 rs3740535 with Primary Lung Cancer Susceptibility: A Case-Control Study in a Chinese Population. DISEASE MARKERS 2019. [DOI: 10.1155/2019/4150263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The purpose of the current study is to explore the contribution of single-nucleotide polymorphisms (SNPs) of REX1 rs6815391, OCT4 rs13409 or rs3130932, and CTBP2 rs3740535 to the risk of lung cancer. A questionnaire survey was used to obtain basic information of the included subjects. A case control study was performed in 1121 patients and 1121 controls. All subjects were subjected to blood sampling for genomic DNA extraction and genotyping of the cancer stem cell-associated gene SNPs, including REX1 rs6815391, OCT4 rs13409 or rs3130932, and CTBP2 rs3740535 by real-time PCR. The association with the risk of primary lung cancer and interaction with environmental factors were assessed using unconditional logistic regression for the odds ratios and corresponding 95% confidence intervals. The genotype frequency distribution of OCT4 rs13409 loci was statistically significant, but there was no significant difference in the rest of the loci between lung cancer patients and healthy controls. The OCT4 gene was also related with lung cancer susceptibility in the genetic model after adjusting for lung cancer-related factors. Despite the presence of the dominant or recessive model, the four loci polymorphisms were associated with pollution near the place of residence, house type, worse ventilation situation, smoking, passive smoking, cooking oil fumes (COF), and family history of cancer, which increased the risk of lung cancer. Nonmarried status, 18.5≤BMI, COF, smoking, passive smoking, family history of cancer, and history of lung disease were independent risk factors of lung cancer susceptibility. Additionally, college degree or above, no pollution near the place of residence, protective genotype 1 or 2, and well ventilation can reduce the occurrence of lung cancer. There is an interaction between the four loci and environmental factors, and OCT4 rs13409 is a risk factor of primary lung cancer.
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17
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Dcona MM, Damle PK, Zarate-Perez F, Morris BL, Nawaz Z, Dennis MJ, Deng X, Korwar S, Singh SJ, Ellis KC, Royer WE, Bandyopadhyay D, Escalante C, Grossman SR. Active-Site Tryptophan, the Target of Antineoplastic C-Terminal Binding Protein Inhibitors, Mediates Inhibitor Disruption of CtBP Oligomerization and Transcription Coregulatory Activities. Mol Pharmacol 2019; 96:99-108. [PMID: 31036695 DOI: 10.1124/mol.118.114363] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Accepted: 04/21/2019] [Indexed: 01/20/2023] Open
Abstract
C-terminal binding proteins (CtBP1/2) are oncogenic transcriptional coregulators and dehydrogenases often overexpressed in multiple solid tumors, including breast, colon, and ovarian cancer, and associated with poor survival. CtBPs act by repressing expression of genes responsible for apoptosis (e.g., PUMA, BIK) and metastasis-associated epithelial-mesenchymal transition (e.g., CDH1), and by activating expression of genes that promote migratory and invasive properties of cancer cells (e.g., TIAM1) and genes responsible for enhanced drug resistance (e.g., MDR1). CtBP's transcriptional functions are also critically dependent on oligomerization and nucleation of transcriptional complexes. Recently, we have developed a family of CtBP dehydrogenase inhibitors, based on the parent 2-hydroxyimino-3-phenylpropanoic acid (HIPP), that specifically disrupt cancer cell viability, abrogate CtBP's transcriptional function, and block polyp formation in a mouse model of intestinal polyposis that depends on CtBP's oncogenic functions. Crystallographic analysis revealed that HIPP interacts with CtBP1/2 at a conserved active site tryptophan (W318/324; CtBP1/2) that is unique among eukaryotic D2-dehydrogenases. To better understand the mechanism of action of HIPP-class inhibitors, we investigated the contribution of W324 to CtBP2's biochemical and physiologic activities utilizing mutational analysis. Indeed, W324 was necessary for CtBP2 self-association, as shown by analytical ultracentrifugation and in vivo cross-linking. Additionally, W324 supported CtBP's association with the transcriptional corepressor CoREST, and was critical for CtBP2 induction of cell motility. Notably, the HIPP derivative 4-chloro-HIPP biochemically and biologically phenocopied mutational inactivation of CtBP2 W324. Our data support further optimization of W318/W324-interacting CtBP dehydrogenase inhibitors that are emerging as a novel class of cancer cell-specific therapeutic.
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Affiliation(s)
- M Michael Dcona
- Departments of Internal Medicine (M.M.D., P.K.D., Z.N., M.J.D., S.J.S., S.R.G.), Human and Molecular Genetics (B.L.M., S.R.G.), Physiology and Biophysics (F.Z.-P., C.E.), Medicinal Chemistry (S.K., K.C.E.), and Biostatistics (X.D., D.B.) and Massey Cancer Center (K.C.E., D.B., C.E., S.R.G.), Virginia Commonwealth University, Richmond, Virginia; and Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, Massachusetts (W.E.R.)
| | - Priyadarshan K Damle
- Departments of Internal Medicine (M.M.D., P.K.D., Z.N., M.J.D., S.J.S., S.R.G.), Human and Molecular Genetics (B.L.M., S.R.G.), Physiology and Biophysics (F.Z.-P., C.E.), Medicinal Chemistry (S.K., K.C.E.), and Biostatistics (X.D., D.B.) and Massey Cancer Center (K.C.E., D.B., C.E., S.R.G.), Virginia Commonwealth University, Richmond, Virginia; and Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, Massachusetts (W.E.R.)
| | - Francisco Zarate-Perez
- Departments of Internal Medicine (M.M.D., P.K.D., Z.N., M.J.D., S.J.S., S.R.G.), Human and Molecular Genetics (B.L.M., S.R.G.), Physiology and Biophysics (F.Z.-P., C.E.), Medicinal Chemistry (S.K., K.C.E.), and Biostatistics (X.D., D.B.) and Massey Cancer Center (K.C.E., D.B., C.E., S.R.G.), Virginia Commonwealth University, Richmond, Virginia; and Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, Massachusetts (W.E.R.)
| | - Benjamin L Morris
- Departments of Internal Medicine (M.M.D., P.K.D., Z.N., M.J.D., S.J.S., S.R.G.), Human and Molecular Genetics (B.L.M., S.R.G.), Physiology and Biophysics (F.Z.-P., C.E.), Medicinal Chemistry (S.K., K.C.E.), and Biostatistics (X.D., D.B.) and Massey Cancer Center (K.C.E., D.B., C.E., S.R.G.), Virginia Commonwealth University, Richmond, Virginia; and Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, Massachusetts (W.E.R.)
| | - Zaid Nawaz
- Departments of Internal Medicine (M.M.D., P.K.D., Z.N., M.J.D., S.J.S., S.R.G.), Human and Molecular Genetics (B.L.M., S.R.G.), Physiology and Biophysics (F.Z.-P., C.E.), Medicinal Chemistry (S.K., K.C.E.), and Biostatistics (X.D., D.B.) and Massey Cancer Center (K.C.E., D.B., C.E., S.R.G.), Virginia Commonwealth University, Richmond, Virginia; and Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, Massachusetts (W.E.R.)
| | - Michael J Dennis
- Departments of Internal Medicine (M.M.D., P.K.D., Z.N., M.J.D., S.J.S., S.R.G.), Human and Molecular Genetics (B.L.M., S.R.G.), Physiology and Biophysics (F.Z.-P., C.E.), Medicinal Chemistry (S.K., K.C.E.), and Biostatistics (X.D., D.B.) and Massey Cancer Center (K.C.E., D.B., C.E., S.R.G.), Virginia Commonwealth University, Richmond, Virginia; and Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, Massachusetts (W.E.R.)
| | - Xiaoyan Deng
- Departments of Internal Medicine (M.M.D., P.K.D., Z.N., M.J.D., S.J.S., S.R.G.), Human and Molecular Genetics (B.L.M., S.R.G.), Physiology and Biophysics (F.Z.-P., C.E.), Medicinal Chemistry (S.K., K.C.E.), and Biostatistics (X.D., D.B.) and Massey Cancer Center (K.C.E., D.B., C.E., S.R.G.), Virginia Commonwealth University, Richmond, Virginia; and Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, Massachusetts (W.E.R.)
| | - Sudha Korwar
- Departments of Internal Medicine (M.M.D., P.K.D., Z.N., M.J.D., S.J.S., S.R.G.), Human and Molecular Genetics (B.L.M., S.R.G.), Physiology and Biophysics (F.Z.-P., C.E.), Medicinal Chemistry (S.K., K.C.E.), and Biostatistics (X.D., D.B.) and Massey Cancer Center (K.C.E., D.B., C.E., S.R.G.), Virginia Commonwealth University, Richmond, Virginia; and Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, Massachusetts (W.E.R.)
| | - Sahib J Singh
- Departments of Internal Medicine (M.M.D., P.K.D., Z.N., M.J.D., S.J.S., S.R.G.), Human and Molecular Genetics (B.L.M., S.R.G.), Physiology and Biophysics (F.Z.-P., C.E.), Medicinal Chemistry (S.K., K.C.E.), and Biostatistics (X.D., D.B.) and Massey Cancer Center (K.C.E., D.B., C.E., S.R.G.), Virginia Commonwealth University, Richmond, Virginia; and Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, Massachusetts (W.E.R.)
| | - Keith C Ellis
- Departments of Internal Medicine (M.M.D., P.K.D., Z.N., M.J.D., S.J.S., S.R.G.), Human and Molecular Genetics (B.L.M., S.R.G.), Physiology and Biophysics (F.Z.-P., C.E.), Medicinal Chemistry (S.K., K.C.E.), and Biostatistics (X.D., D.B.) and Massey Cancer Center (K.C.E., D.B., C.E., S.R.G.), Virginia Commonwealth University, Richmond, Virginia; and Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, Massachusetts (W.E.R.)
| | - William E Royer
- Departments of Internal Medicine (M.M.D., P.K.D., Z.N., M.J.D., S.J.S., S.R.G.), Human and Molecular Genetics (B.L.M., S.R.G.), Physiology and Biophysics (F.Z.-P., C.E.), Medicinal Chemistry (S.K., K.C.E.), and Biostatistics (X.D., D.B.) and Massey Cancer Center (K.C.E., D.B., C.E., S.R.G.), Virginia Commonwealth University, Richmond, Virginia; and Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, Massachusetts (W.E.R.)
| | - Dipankar Bandyopadhyay
- Departments of Internal Medicine (M.M.D., P.K.D., Z.N., M.J.D., S.J.S., S.R.G.), Human and Molecular Genetics (B.L.M., S.R.G.), Physiology and Biophysics (F.Z.-P., C.E.), Medicinal Chemistry (S.K., K.C.E.), and Biostatistics (X.D., D.B.) and Massey Cancer Center (K.C.E., D.B., C.E., S.R.G.), Virginia Commonwealth University, Richmond, Virginia; and Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, Massachusetts (W.E.R.)
| | - Carlos Escalante
- Departments of Internal Medicine (M.M.D., P.K.D., Z.N., M.J.D., S.J.S., S.R.G.), Human and Molecular Genetics (B.L.M., S.R.G.), Physiology and Biophysics (F.Z.-P., C.E.), Medicinal Chemistry (S.K., K.C.E.), and Biostatistics (X.D., D.B.) and Massey Cancer Center (K.C.E., D.B., C.E., S.R.G.), Virginia Commonwealth University, Richmond, Virginia; and Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, Massachusetts (W.E.R.)
| | - Steven R Grossman
- Departments of Internal Medicine (M.M.D., P.K.D., Z.N., M.J.D., S.J.S., S.R.G.), Human and Molecular Genetics (B.L.M., S.R.G.), Physiology and Biophysics (F.Z.-P., C.E.), Medicinal Chemistry (S.K., K.C.E.), and Biostatistics (X.D., D.B.) and Massey Cancer Center (K.C.E., D.B., C.E., S.R.G.), Virginia Commonwealth University, Richmond, Virginia; and Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, Massachusetts (W.E.R.)
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18
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Hypoxia-inducible factors promote breast cancer stem cell specification and maintenance in response to hypoxia or cytotoxic chemotherapy. Adv Cancer Res 2019; 141:175-212. [PMID: 30691683 DOI: 10.1016/bs.acr.2018.11.001] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Clinical studies have revealed that breast cancers contain regions of intratumoral hypoxia (reduced oxygen availability), which activates hypoxia-inducible factors (HIFs). The relationship between intratumoral hypoxia, distant metastasis and cancer mortality has been well established. A major mechanism by which intratumoral hypoxia contributes to disease progression is through induction of the breast cancer stem cell (BCSC) phenotype. BCSCs are a small subpopulation of cells with the capability for self-renewal. BCSCs have been implicated in resistance to chemotherapy, disease recurrence, and metastasis. In this review, we will discuss our current understanding of the molecular mechanisms underlying HIF-dependent induction of the BCSC phenotype in response to hypoxia or chemotherapy.
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19
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Blevins MA, Huang M, Zhao R. The Role of CtBP1 in Oncogenic Processes and Its Potential as a Therapeutic Target. Mol Cancer Ther 2018; 16:981-990. [PMID: 28576945 DOI: 10.1158/1535-7163.mct-16-0592] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Revised: 11/11/2016] [Accepted: 02/22/2017] [Indexed: 12/24/2022]
Abstract
Transcriptional corepressor proteins have emerged as an important facet of cancer etiology. These corepressor proteins are often altered by loss- or gain-of-function mutations, leading to transcriptional imbalance. Thus, research directed at expanding our current understanding of transcriptional corepressors could impact the future development of new cancer diagnostics, prognostics, and therapies. In this review, our current understanding of the CtBP corepressors, and their role in both development and disease, is discussed in detail. Importantly, the role of CtBP1 overexpression in adult tissues in promoting the progression of multiple cancer types through their ability to modulate the transcription of developmental genes ectopically is explored. CtBP1 overexpression is known to be protumorigenic and affects the regulation of gene networks associated with "cancer hallmarks" and malignant behavior, including increased cell survival, proliferation, migration, invasion, and the epithelial-mesenchymal transition. As a transcriptional regulator of broad developmental processes capable of promoting malignant growth in adult tissues, therapeutically targeting the CtBP1 corepressor has the potential to be an effective method for the treatment of diverse tumor types. Although efforts to develop CtBP1 inhibitors are still in the early stages, the current progress and the future perspectives of therapeutically targeting this transcriptional corepressor are also discussed. Mol Cancer Ther; 16(6); 981-90. ©2017 AACR.
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Affiliation(s)
- Melanie A Blevins
- Department of Biochemistry and Molecular Genetics, University of Colorado School of Medicine, Aurora, Colorado
| | - Mingxia Huang
- Department of Dermatology, University of Colorado School of Medicine, Aurora, Colorado.
| | - Rui Zhao
- Department of Biochemistry and Molecular Genetics, University of Colorado School of Medicine, Aurora, Colorado.
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20
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Jiang X, Zhang C, Qi S, Guo S, Chen Y, Du E, Zhang H, Wang X, Liu R, Qiao B, Yang K, Zhang Z, Xu Y. Elevated expression of ZNF217 promotes prostate cancer growth by restraining ferroportin-conducted iron egress. Oncotarget 2018; 7:84893-84906. [PMID: 27768596 PMCID: PMC5356707 DOI: 10.18632/oncotarget.12753] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2016] [Accepted: 10/05/2016] [Indexed: 01/09/2023] Open
Abstract
Although we and other studies indicated ZNF217 expression was increased in prostate cancer (PCa), the factors mediating its misregulated expression and their oncogenic activity remain largely unexplored. Recent evidence demonstrated that ferroportin (FPN) reduction lead to decreased iron export and increased intercellular iron that consequently aggravates the oncogenic effects of iron. In the present study, ZNF217 was identified as a transcriptional repressor that inhibits FPN expression. Increased of ZNF217 expression led to decreased FPN concentration, coupled with resultant intracellular iron retention, increased iron-related cellular activities and enhanced tumor cell growth. In contrast, decreased of ZNF217 expression restrained tumor cell growth by promoting FPN-driven iron egress. Mechanistic investigation manifested that ZNF217 facilitated the H3K27me3 levels of FPN promoter by interacting with EZH2. Besides, we also found that MAZ increased the transcription level of ZNF217, and subsequently inhibited the FPN expression and their iron–related activities. Strikingly, the expression of MAZ, EZH2 and ZNF217 were concurrently upregulated in PCa, leading to decreased expression of FPN, which induce disordered iron metabolism. Collectively, this study underscored that elevated expression of ZNF217 promotes prostate cancer growth by restraining FPN-conducted iron egress.
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Affiliation(s)
- Xingkang Jiang
- Department of Urology, The Second Hospital of Tianjin Medical University, Tianjin Institute of Urology, Tianjin 300211, China
| | - Changwen Zhang
- Department of Urology, The Second Hospital of Tianjin Medical University, Tianjin Institute of Urology, Tianjin 300211, China
| | - Shiyong Qi
- Department of Urology, The Second Hospital of Tianjin Medical University, Tianjin Institute of Urology, Tianjin 300211, China
| | - Shanqi Guo
- Department of Oncology, First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin 300112, China
| | - Yue Chen
- Department of Urology, The Second Hospital of Tianjin Medical University, Tianjin Institute of Urology, Tianjin 300211, China
| | - E Du
- Department of Urology, The Second Hospital of Tianjin Medical University, Tianjin Institute of Urology, Tianjin 300211, China
| | - Hongtuan Zhang
- Department of Urology, The Second Hospital of Tianjin Medical University, Tianjin Institute of Urology, Tianjin 300211, China
| | - Xiaoming Wang
- Department of Urology, The Second Hospital of Tianjin Medical University, Tianjin Institute of Urology, Tianjin 300211, China
| | - Ranlu Liu
- Department of Urology, The Second Hospital of Tianjin Medical University, Tianjin Institute of Urology, Tianjin 300211, China
| | - Baomin Qiao
- Department of Urology, The Second Hospital of Tianjin Medical University, Tianjin Institute of Urology, Tianjin 300211, China
| | - Kuo Yang
- Department of Urology, The Second Hospital of Tianjin Medical University, Tianjin Institute of Urology, Tianjin 300211, China
| | - Zhihong Zhang
- Department of Urology, The Second Hospital of Tianjin Medical University, Tianjin Institute of Urology, Tianjin 300211, China
| | - Yong Xu
- Department of Urology, The Second Hospital of Tianjin Medical University, Tianjin Institute of Urology, Tianjin 300211, China
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21
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Zemke NR, Berk AJ. The Adenovirus E1A C Terminus Suppresses a Delayed Antiviral Response and Modulates RAS Signaling. Cell Host Microbe 2017; 22:789-800.e5. [PMID: 29241042 PMCID: PMC5736016 DOI: 10.1016/j.chom.2017.11.008] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Revised: 08/01/2017] [Accepted: 11/17/2017] [Indexed: 01/22/2023]
Abstract
The N-terminal half of adenovirus e1a assembles multimeric complexes with host proteins that repress innate immune responses and force host cells into S-phase. In contrast, the functions of e1a's C-terminal interactions with FOXK, DCAF7, and CtBP are unknown. We found that these interactions modulate RAS signaling, and that a single e1a molecule must bind all three of these host proteins to suppress activation of a subset of IFN-stimulated genes (ISGs). These ISGs were otherwise induced in primary respiratory epithelial cells at 12 hr p.i. This delayed activation of ISGs required IRF3 and coincided with an ∼10-fold increase in IRF3 from protein stabilization. The induced IRF3 bound to chromatin and localized to the promoters of activated ISGs. While IRF3, STAT1/2, and IRF9 all greatly increased in concentration, there were no corresponding mRNA increases, suggesting that e1a regulates the stabilities of these key activators of innate immune responses, as shown directly for IRF3.
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Affiliation(s)
- Nathan R Zemke
- Molecular Biology Institute, University of California, Los Angeles, Los Angeles, CA 90095-1570, USA
| | - Arnold J Berk
- Molecular Biology Institute, University of California, Los Angeles, Los Angeles, CA 90095-1570, USA; Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles, Los Angeles, CA 90095-1570, USA.
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22
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ZNF516 suppresses EGFR by targeting the CtBP/LSD1/CoREST complex to chromatin. Nat Commun 2017; 8:691. [PMID: 28947780 PMCID: PMC5612949 DOI: 10.1038/s41467-017-00702-5] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Accepted: 07/18/2017] [Indexed: 01/01/2023] Open
Abstract
EGFR is required for animal development, and dysregulation of EGFR is critically implicated in malignant transformation. However, the molecular mechanism underlying the regulation of EGFR expression remains poorly explored. Here we report that the zinc-finger protein ZNF516 is a transcription repressor. ZNF516 is physically associated with the CtBP/LSD1/CoREST complex and transcriptionally represses a cohort of genes including EGFR that are critically involved in cell proliferation and motility. We demonstrate that the ZNF516–CtBP/LSD1/CoREST complex inhibits the proliferation and invasion of breast cancer cells in vitro and suppresses breast cancer growth and metastasis in vivo. Significantly, low expression of ZNF516 is positively associated with advanced pathological staging and poor survival of breast carcinomas. Our data indicate that ZNF516 is a transcription repressor and a potential suppressor of EGFR, adding to the understanding of EGFR-related breast carcinogenesis and supporting the pursuit of ZNF516 as a potential therapeutic target for breast cancer. EGFR is a well-known oncogene; however, the mechanisms regulating its expression are still unclear. Here, analysing genome-wide chromatin associations, the authors show that in breast cancer cells ZNF516 represses EGFR transcription through the interaction with the CtBP/LSD1/CoREST complex.
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23
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Zhai J, Liu J, Cheng X, Li S, Hong Y, Sun K, Chen ZJ, Du Y, Li W. Zinc finger gene 217 (ZNF217) Promoted Ovarian Hyperstimulation Syndrome (OHSS) through Regulating E 2 Synthesis and Inhibiting Thrombospondin-1 (TSP-1). Sci Rep 2017; 7:3245. [PMID: 28607476 PMCID: PMC5468349 DOI: 10.1038/s41598-017-03555-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Accepted: 05/02/2017] [Indexed: 01/24/2023] Open
Abstract
Zinc finger gene 217 (ZNF217) is a candidate gene of polycystic ovary syndrome (PCOS) which is vulnerable to ovarian hyperstimulation syndrome (OHSS). However, the relationship between ZNF217 and OHSS is largely unknown. Our study demonstrated that ZNF217 was mainly distributed in the granulosa cells of rat ovary. Significantly higher expression of ovarian ZNF217 was detected in OHSS rats, being consistent with serum 17β-estradiol concentration and ovarian aromatase. Moreover, OHSS rats also showed decreased ovarian TSP-1 mRNA, an acknowledged VEGF signaling suppressor. The same changes were detected in human granulosa cells and follicular fluid. Thus, the increased ZNF217 and decreased TSP-1 may participate in OHSS onset. In vitro experiment revealed that ZNF217 positively regulated E2 synthesis through promoting cAMP response element binding protein (CREB) and thereby CYP19A1 in KGN cells. Furthermore, ZNF217 negatively regulated TSP-1 in KGN cells while TSP-1 promoted claudin1 and inhibited nitric oxide (NO) in HUVECs and HAECs. Both of claudin1 and NO are responsible for the regulation of vascular permeability (VP). Therefore, we demonstrated that ZNF217 contributed to OHSS onset through promoting E2 synthesis and the increase of VP. Moreover, the increased ZNF217 and decreased TSP-1 provided new targets for the prevention or treatment of OHSS in the future.
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Affiliation(s)
- Junyu Zhai
- Center for Reproductive Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200135, China.,Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, 200135, China
| | - Jiansheng Liu
- Center for Reproductive Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200135, China.,Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, 200135, China
| | - Xiaoyue Cheng
- Center for Reproductive Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200135, China.,Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, 200135, China
| | - Shang Li
- Center for Reproductive Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200135, China.,Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, 200135, China
| | - Yan Hong
- Center for Reproductive Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200135, China.,Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, 200135, China
| | - Kang Sun
- Center for Reproductive Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200135, China.,Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, 200135, China
| | - Zi-Jiang Chen
- Center for Reproductive Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200135, China.,Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, 200135, China.,National Research Center for Assisted Reproductive Technology and Reproductive Genetics, The Key Laboratory for Reproductive Endocrinology of Ministry of Education, Shandong Provincial Key Laboratory of Reproductive Medicine, Center for Reproductive Medicine, Shandong Provincial Hospital, Shandong University, Jinan, 250021, China
| | - Yanzhi Du
- Center for Reproductive Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200135, China. .,Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, 200135, China.
| | - Weiping Li
- Center for Reproductive Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200135, China. .,Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, 200135, China.
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24
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Cohen PA, Donini CF, Nguyen NT, Lincet H, Vendrell JA. The dark side of ZNF217, a key regulator of tumorigenesis with powerful biomarker value. Oncotarget 2016; 6:41566-81. [PMID: 26431164 PMCID: PMC4747174 DOI: 10.18632/oncotarget.5893] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Accepted: 09/18/2015] [Indexed: 12/31/2022] Open
Abstract
The recently described oncogene ZNF217 belongs to a chromosomal region that is frequently amplified in human cancers. Recent findings have revealed that alternative mechanisms such as epigenetic regulation also govern the expression of the encoded ZNF217 protein. Newly discovered molecular functions of ZNF217 indicate that it orchestrates complex intracellular circuits as a new key regulator of tumorigenesis. In this review, we focus on recent research on ZNF217-driven molecular functions in human cancers, revisiting major hallmarks of cancer and highlighting the downstream molecular targets and signaling pathways of ZNF217. We also discuss the exciting translational medicine investigating ZNF217 expression levels as a new powerful biomarker, and ZNF217 as a candidate target for future anti-cancer therapies.
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Affiliation(s)
- Pascale A Cohen
- ISPB, Faculté de Pharmacie, Lyon, France.,Université Lyon 1, Lyon, France.,INSERM U1052, CNRS UMR5286, Centre de Recherche en Cancérologie de Lyon, Lyon, France
| | - Caterina F Donini
- ISPB, Faculté de Pharmacie, Lyon, France.,Université Lyon 1, Lyon, France.,INSERM U1052, CNRS UMR5286, Centre de Recherche en Cancérologie de Lyon, Lyon, France
| | - Nhan T Nguyen
- ISPB, Faculté de Pharmacie, Lyon, France.,Université Lyon 1, Lyon, France.,INSERM U1052, CNRS UMR5286, Centre de Recherche en Cancérologie de Lyon, Lyon, France
| | - Hubert Lincet
- ISPB, Faculté de Pharmacie, Lyon, France.,Université Lyon 1, Lyon, France.,INSERM U1052, CNRS UMR5286, Centre de Recherche en Cancérologie de Lyon, Lyon, France
| | - Julie A Vendrell
- ISPB, Faculté de Pharmacie, Lyon, France.,Université Lyon 1, Lyon, France.,INSERM U1052, CNRS UMR5286, Centre de Recherche en Cancérologie de Lyon, Lyon, France
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25
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Aguilo F, Zhang F, Sancho A, Fidalgo M, Di Cecilia S, Vashisht A, Lee DF, Chen CH, Rengasamy M, Andino B, Jahouh F, Roman A, Krig SR, Wang R, Zhang W, Wohlschlegel JA, Wang J, Walsh MJ. Coordination of m(6)A mRNA Methylation and Gene Transcription by ZFP217 Regulates Pluripotency and Reprogramming. Cell Stem Cell 2015; 17:689-704. [PMID: 26526723 DOI: 10.1016/j.stem.2015.09.005] [Citation(s) in RCA: 236] [Impact Index Per Article: 26.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2015] [Revised: 06/24/2015] [Accepted: 09/11/2015] [Indexed: 12/15/2022]
Abstract
Epigenetic and epitranscriptomic networks have important functions in maintaining the pluripotency of embryonic stem cells (ESCs) and somatic cell reprogramming. However, the mechanisms integrating the actions of these distinct networks are only partially understood. Here we show that the chromatin-associated zinc finger protein 217 (ZFP217) coordinates epigenetic and epitranscriptomic regulation. ZFP217 interacts with several epigenetic regulators, activates the transcription of key pluripotency genes, and modulates N6-methyladenosine (m(6)A) deposition on their transcripts by sequestering the enzyme m(6)A methyltransferase-like 3 (METTL3). Consistently, Zfp217 depletion compromises ESC self-renewal and somatic cell reprogramming, globally increases m(6)A RNA levels, and enhances m(6)A modification of the Nanog, Sox2, Klf4, and c-Myc mRNAs, promoting their degradation. ZFP217 binds its own target gene mRNAs, which are also METTL3 associated, and is enriched at promoters of m(6)A-modified transcripts. Collectively, these findings shed light on how a transcription factor can tightly couple gene transcription to m(6)A RNA modification to ensure ESC identity.
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Affiliation(s)
- Francesca Aguilo
- Department of Structural and Chemical Biology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Department of Pediatrics, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA.
| | - Fan Zhang
- Bioinformatics Laboratory, Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Ana Sancho
- Department of Structural and Chemical Biology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Department of Pediatrics, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Miguel Fidalgo
- Department of Developmental and Regenerative Biology and The Black Family Stem Cell Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Serena Di Cecilia
- Department of Structural and Chemical Biology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Department of Pediatrics, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Ajay Vashisht
- Department of Biological Chemistry and Institute of Genomics and Proteomics, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Dung-Fang Lee
- Department of Developmental and Regenerative Biology and The Black Family Stem Cell Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Chih-Hung Chen
- Department of Structural and Chemical Biology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Department of Pediatrics, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Madhumitha Rengasamy
- Department of Structural and Chemical Biology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Department of Pediatrics, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Blanca Andino
- Department of Structural and Chemical Biology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Department of Pediatrics, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Farid Jahouh
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Angel Roman
- Instituto Cajal, Consejo Superior de Investigaciones Científicas, Madrid 28002, Spain
| | - Sheryl R Krig
- Department of Biochemistry and Molecular Medicine, University of California Davis School of Medicine, Sacramento, CA 95817, USA
| | - Rong Wang
- Department of Structural and Chemical Biology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Weijia Zhang
- Bioinformatics Laboratory, Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - James A Wohlschlegel
- Department of Biological Chemistry and Institute of Genomics and Proteomics, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Jianlong Wang
- Department of Developmental and Regenerative Biology and The Black Family Stem Cell Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Martin J Walsh
- Department of Structural and Chemical Biology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Department of Pediatrics, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA.
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26
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Zannino DA, Sagerström CG. An emerging role for prdm family genes in dorsoventral patterning of the vertebrate nervous system. Neural Dev 2015; 10:24. [PMID: 26499851 PMCID: PMC4620005 DOI: 10.1186/s13064-015-0052-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Accepted: 10/13/2015] [Indexed: 12/13/2022] Open
Abstract
The embryonic vertebrate neural tube is divided along its dorsoventral (DV) axis into eleven molecularly discrete progenitor domains. Each of these domains gives rise to distinct neuronal cell types; the ventral-most six domains contribute to motor circuits, while the five dorsal domains contribute to sensory circuits. Following the initial neurogenesis step, these domains also generate glial cell types—either astrocytes or oligodendrocytes. This DV pattern is initiated by two morphogens—Sonic Hedgehog released from notochord and floor plate and Bone Morphogenetic Protein produced in the roof plate—that act in concentration gradients to induce expression of genes along the DV axis. Subsequently, these DV-restricted genes cooperate to define progenitor domains and to control neuronal cell fate specification and differentiation in each domain. Many genes involved in this process have been identified, but significant gaps remain in our understanding of the underlying genetic program. Here we review recent work identifying members of the Prdm gene family as novel regulators of DV patterning in the neural tube. Many Prdm proteins regulate transcription by controlling histone modifications (either via intrinsic histone methyltransferase activity, or by recruiting histone modifying enzymes). Prdm genes are expressed in spatially restricted domains along the DV axis of the neural tube and play important roles in the specification of progenitor domains, as well as in the subsequent differentiation of motor neurons and various types of interneurons. Strikingly, Prdm proteins appear to function by binding to, and modulating the activity of, other transcription factors (particularly bHLH proteins). The identity of key transcription factors in DV patterning of the neural tube has been elucidated previously (e.g. the nkx, bHLH and pax families), but it now appears that an additional family is also required and that it acts in a potentially novel manner.
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Affiliation(s)
- Denise A Zannino
- Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, 364 Plantation St./LRB815, Worcester, MA, 01605-2324, USA.
| | - Charles G Sagerström
- Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, 364 Plantation St./LRB815, Worcester, MA, 01605-2324, USA.
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Reid A, Sherry TJ, Yücel D, Llamosas E, Nicholas HR. The C-terminal binding protein (CTBP-1) regulates dorsal SMD axonal morphology in Caenorhabditis elegans. Neuroscience 2015; 311:216-30. [PMID: 26480814 DOI: 10.1016/j.neuroscience.2015.10.026] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Revised: 10/09/2015] [Accepted: 10/13/2015] [Indexed: 12/31/2022]
Abstract
C-terminal binding proteins (CtBPs) are transcriptional co-repressors which cooperate with a variety of transcription factors to repress gene expression. Caenorhabditis elegans CTBP-1 expression has been observed in the nervous system and hypodermis. In C. elegans, CTBP-1 regulates several processes including Acute Functional Tolerance to ethanol and functions in the nervous system to modulate both lifespan and expression of a lipase gene called lips-7. Incorrect structure and/or function of the nervous system can lead to behavioral changes. Here, we demonstrate reduced exploration behavior in ctbp-1 mutants. Our examination of a subset of neurons involved in regulating locomotion revealed that the axonal morphology of dorsal SMD (SMDD) neurons is altered in ctbp-1 mutants at the fourth larval (L4) stage. Expressing CTBP-1 under the control of the endogenous ctbp-1 promoter rescued both the exploration behavior phenotype and defective SMDD axon structure in ctbp-1 mutants at the L4 stage. Interestingly, the pre-synaptic marker RAB-3 was found to localize to the mispositioned portion of SMDD axons in a ctbp-1 mutant. Further analysis of SMDD axonal morphology at days 1, 3 and 5 of adulthood revealed that the number of ctbp-1 mutants showing an SMDD axonal morphology defect increases in early adulthood and the observed defect appears to be qualitatively more severe. CTBP-1 is prominently expressed in the nervous system with weak expression detected in the hypodermis. Surprisingly, solely expressing CTBP-1a in the nervous system or hypodermis did not restore correct SMDD axonal structure in a ctbp-1 mutant. Our results demonstrate a role for CTBP-1 in exploration behavior and the regulation of SMDD axonal morphology in C. elegans.
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Affiliation(s)
- A Reid
- School of Molecular Bioscience, The University of Sydney, Sydney, NSW 2006, Australia
| | - T J Sherry
- School of Molecular Bioscience, The University of Sydney, Sydney, NSW 2006, Australia
| | - D Yücel
- School of Molecular Bioscience, The University of Sydney, Sydney, NSW 2006, Australia
| | - E Llamosas
- School of Molecular Bioscience, The University of Sydney, Sydney, NSW 2006, Australia
| | - H R Nicholas
- School of Molecular Bioscience, The University of Sydney, Sydney, NSW 2006, Australia.
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Stankiewicz TR, Gray JJ, Winter AN, Linseman DA. C-terminal binding proteins: central players in development and disease. Biomol Concepts 2015; 5:489-511. [PMID: 25429601 DOI: 10.1515/bmc-2014-0027] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2014] [Accepted: 10/07/2014] [Indexed: 01/06/2023] Open
Abstract
C-terminal binding proteins (CtBPs) were initially identified as binding partners for the E1A-transforming proteins. Although the invertebrate genome encodes one CtBP protein, two CtBPs (CtBP1 and CtBP2) are encoded by the vertebrate genome and perform both unique and duplicative functions. CtBP1 and CtBP2 are closely related and act as transcriptional corepressors when activated by nicotinamide adenine dinucleotide binding to their dehydrogenase domains. CtBPs exert transcriptional repression primarily via recruitment of a corepressor complex to DNA that consists of histone deacetylases (HDACs) and histone methyltransferases, although CtBPs can also repress transcription through HDAC-independent mechanisms. More recent studies have demonstrated a critical function for CtBPs in the transcriptional repression of pro-apoptotic genes such as Bax, Puma, Bik, and Noxa. Nonetheless, although recent efforts have characterized the essential involvement of CtBPs in promoting cellular survival, the dysregulation of CtBPs in both neurodegenerative disease and cancers remains to be fully elucidated.
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Kang H, McElroy KA, Jung YL, Alekseyenko AA, Zee BM, Park PJ, Kuroda MI. Sex comb on midleg (Scm) is a functional link between PcG-repressive complexes in Drosophila. Genes Dev 2015; 29:1136-50. [PMID: 26063573 PMCID: PMC4470282 DOI: 10.1101/gad.260562.115] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
In this study, Kang et al. investigate how PcG complexes form repressive chromatin domains. The findings show that Scm, a transcriptional repressor, is an important regulator of PRC1, PRC2, and transcriptional silencing and suggest that Scm coordinates PcG complexes and polymerizes, resulting in PcG silencing. The Polycomb group (PcG) proteins are key regulators of development in Drosophila and are strongly implicated in human health and disease. How PcG complexes form repressive chromatin domains remains unclear. Using cross-linked affinity purifications of BioTAP-Polycomb (Pc) or BioTAP-Enhancer of zeste [E(z)], we captured all PcG-repressive complex 1 (PRC1) or PRC2 core components and Sex comb on midleg (Scm) as the only protein strongly enriched with both complexes. Although previously not linked to PRC2, we confirmed direct binding of Scm and PRC2 using recombinant protein expression and colocalization of Scm with PRC1, PRC2, and H3K27me3 in embryos and cultured cells using ChIP-seq (chromatin immunoprecipitation [ChIP] combined with deep sequencing). Furthermore, we found that RNAi knockdown of Scm and overexpression of the dominant-negative Scm-SAM (sterile α motif) domain both affected the binding pattern of E(z) on polytene chromosomes. Aberrant localization of the Scm-SAM domain in long contiguous regions on polytene chromosomes revealed its independent ability to spread on chromatin, consistent with its previously described ability to oligomerize in vitro. Pull-downs of BioTAP-Scm captured PRC1 and PRC2 and additional repressive complexes, including PhoRC, LINT, and CtBP. We propose that Scm is a key mediator connecting PRC1, PRC2, and transcriptional silencing. Combined with previous structural and genetic analyses, our results strongly suggest that Scm coordinates PcG complexes and polymerizes to produce broad domains of PcG silencing.
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Affiliation(s)
- Hyuckjoon Kang
- Division of Genetics, Brigham and Women's Hospital, Boston, Massachusetts 02115, USA; Department of Genetics, Harvard Medical School, Boston, Massachusetts 02115, USA
| | - Kyle A McElroy
- Division of Genetics, Brigham and Women's Hospital, Boston, Massachusetts 02115, USA; Department of Genetics, Harvard Medical School, Boston, Massachusetts 02115, USA; Department of Molecular and Cellular Biology, Harvard University, Cambridge, Massachusetts 02138, USA
| | - Youngsook Lucy Jung
- Division of Genetics, Brigham and Women's Hospital, Boston, Massachusetts 02115, USA; Center for Biomedical Informatics, Harvard Medical School, Boston, Massachusetts 02115, USA
| | - Artyom A Alekseyenko
- Division of Genetics, Brigham and Women's Hospital, Boston, Massachusetts 02115, USA; Department of Genetics, Harvard Medical School, Boston, Massachusetts 02115, USA
| | - Barry M Zee
- Division of Genetics, Brigham and Women's Hospital, Boston, Massachusetts 02115, USA; Department of Genetics, Harvard Medical School, Boston, Massachusetts 02115, USA
| | - Peter J Park
- Division of Genetics, Brigham and Women's Hospital, Boston, Massachusetts 02115, USA; Center for Biomedical Informatics, Harvard Medical School, Boston, Massachusetts 02115, USA
| | - Mitzi I Kuroda
- Division of Genetics, Brigham and Women's Hospital, Boston, Massachusetts 02115, USA; Department of Genetics, Harvard Medical School, Boston, Massachusetts 02115, USA;
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Burg JM, Link JE, Morgan BS, Heller FJ, Hargrove AE, McCafferty DG. KDM1 class flavin-dependent protein lysine demethylases. Biopolymers 2015; 104:213-46. [PMID: 25787087 PMCID: PMC4747437 DOI: 10.1002/bip.22643] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2015] [Revised: 03/02/2015] [Accepted: 03/07/2015] [Indexed: 12/11/2022]
Abstract
Flavin-dependent, lysine-specific protein demethylases (KDM1s) are a subfamily of amine oxidases that catalyze the selective posttranslational oxidative demethylation of methyllysine side chains within protein and peptide substrates. KDM1s participate in the widespread epigenetic regulation of both normal and disease state transcriptional programs. Their activities are central to various cellular functions, such as hematopoietic and neuronal differentiation, cancer proliferation and metastasis, and viral lytic replication and establishment of latency. Interestingly, KDM1s function as catalytic subunits within complexes with coregulatory molecules that modulate enzymatic activity of the demethylases and coordinate their access to specific substrates at distinct sites within the cell and chromatin. Although several classes of KDM1-selective small molecule inhibitors have been recently developed, these pan-active site inhibition strategies lack the ability to selectively discriminate between KDM1 activity in specific, and occasionally opposing, functional contexts within these complexes. Here we review the discovery of this class of demethylases, their structures, chemical mechanisms, and specificity. Additionally, we review inhibition of this class of enzymes as well as emerging interactions with coregulatory molecules that regulate demethylase activity in highly specific functional contexts of biological and potential therapeutic importance.
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31
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Dewi V, Kwok A, Lee S, Lee MM, Tan YM, Nicholas HR, Isono KI, Wienert B, Mak KS, Knights AJ, Quinlan KGR, Cordwell SJ, Funnell APW, Pearson RCM, Crossley M. Phosphorylation of Krüppel-like factor 3 (KLF3/BKLF) and C-terminal binding protein 2 (CtBP2) by homeodomain-interacting protein kinase 2 (HIPK2) modulates KLF3 DNA binding and activity. J Biol Chem 2015; 290:8591-605. [PMID: 25659434 DOI: 10.1074/jbc.m115.638338] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Krüppel-like factor 3 (KLF3/BKLF), a member of the Krüppel-like factor (KLF) family of transcription factors, is a widely expressed transcriptional repressor with diverse biological roles. Although there is considerable understanding of the molecular mechanisms that allow KLF3 to silence the activity of its target genes, less is known about the signal transduction pathways and post-translational modifications that modulate KLF3 activity in response to physiological stimuli. We observed that KLF3 is modified in a range of different tissues and found that the serine/threonine kinase homeodomain-interacting protein kinase 2 (HIPK2) can both bind and phosphorylate KLF3. Mass spectrometry identified serine 249 as the primary phosphorylation site. Mutation of this site reduces the ability of KLF3 to bind DNA and repress transcription. Furthermore, we also determined that HIPK2 can phosphorylate the KLF3 co-repressor C-terminal binding protein 2 (CtBP2) at serine 428. Finally, we found that phosphorylation of KLF3 and CtBP2 by HIPK2 strengthens the interaction between these two factors and increases transcriptional repression by KLF3. Taken together, our results indicate that HIPK2 potentiates the activity of KLF3.
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Affiliation(s)
- Vitri Dewi
- From the School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Alister Kwok
- the School of Molecular Bioscience, University of Sydney, Sydney, New South Wales, 2006, Australia, and
| | - Stella Lee
- the School of Molecular Bioscience, University of Sydney, Sydney, New South Wales, 2006, Australia, and
| | - Ming Min Lee
- the School of Molecular Bioscience, University of Sydney, Sydney, New South Wales, 2006, Australia, and
| | - Yee Mun Tan
- the School of Molecular Bioscience, University of Sydney, Sydney, New South Wales, 2006, Australia, and
| | - Hannah R Nicholas
- the School of Molecular Bioscience, University of Sydney, Sydney, New South Wales, 2006, Australia, and
| | - Kyo-ichi Isono
- the RIKEN Research Center for Allergy and Immunology, Tsurumi-ku, Yokohama City, Kanagawa 230-0045, Japan
| | - Beeke Wienert
- From the School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Ka Sin Mak
- From the School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Alexander J Knights
- From the School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Kate G R Quinlan
- From the School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Stuart J Cordwell
- the School of Molecular Bioscience, University of Sydney, Sydney, New South Wales, 2006, Australia, and
| | - Alister P W Funnell
- From the School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Richard C M Pearson
- From the School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Merlin Crossley
- From the School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, New South Wales 2052, Australia, the School of Molecular Bioscience, University of Sydney, Sydney, New South Wales, 2006, Australia, and
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Li Z, Du L, Dong Z, Yang Y, Zhang X, Wang L, Li J, Zheng G, Qu A, Wang C. MiR-203 suppresses ZNF217 upregulation in colorectal cancer and its oncogenicity. PLoS One 2015; 10:e0116170. [PMID: 25621839 PMCID: PMC4306553 DOI: 10.1371/journal.pone.0116170] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Accepted: 12/03/2014] [Indexed: 12/11/2022] Open
Abstract
Zinc finger protein 217 (ZNF217) is essential for cell proliferation and has been implicated in tumorigenesis. However, its expression and exact roles in colorectal cancer (CRC) remain unclear. In this study, we demonstrated that ZNF217 expression was aberrantly upregulated in CRC tissues and associated with poor overall survival of CRC patients. In addition, we found that ZNF217 was a putative target of microRNA (miR)-203 using bioinformatics analysis and confirmed that using luciferase reporter assay. Moreover, in vitro knockdown of ZNF217 or enforced expression of miR-203 attenuated CRC cell proliferation, invasion and migration. Furthermore, combined treatment of ZNF217 siRNA and miR-203 exhibited synergistic inhibitory effects. Taken together, our results provide new evidences that ZNF217 has an oncogenic role in CRC and is regulated by miR-203, and open up the possibility of ZNF217- and miR-203-targeted therapy for CRC.
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Affiliation(s)
- Zewu Li
- Department of Clinical Laboratory, Qilu Hospital, Shandong University, Jinan, Shandong Province, China
| | - Lutao Du
- Department of Clinical Laboratory, Qilu Hospital, Shandong University, Jinan, Shandong Province, China
| | - Zhaogang Dong
- Department of Clinical Laboratory, Qilu Hospital, Shandong University, Jinan, Shandong Province, China
| | - Yongmei Yang
- Department of Clinical Laboratory, Qilu Hospital, Shandong University, Jinan, Shandong Province, China
| | - Xin Zhang
- Department of Clinical Laboratory, Qilu Hospital, Shandong University, Jinan, Shandong Province, China
| | - Lili Wang
- Department of Clinical Laboratory, Qilu Hospital, Shandong University, Jinan, Shandong Province, China
| | - Juan Li
- Department of Clinical Laboratory, Qilu Hospital, Shandong University, Jinan, Shandong Province, China
| | - Guixi Zheng
- Department of Clinical Laboratory, Qilu Hospital, Shandong University, Jinan, Shandong Province, China
| | - Ailin Qu
- Department of Clinical Laboratory, Qilu Hospital, Shandong University, Jinan, Shandong Province, China
| | - Chuanxin Wang
- Department of Clinical Laboratory, Qilu Hospital, Shandong University, Jinan, Shandong Province, China
- * E-mail:
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Boxer LD, Barajas B, Tao S, Zhang J, Khavari PA. ZNF750 interacts with KLF4 and RCOR1, KDM1A, and CTBP1/2 chromatin regulators to repress epidermal progenitor genes and induce differentiation genes. Genes Dev 2014; 28:2013-26. [PMID: 25228645 PMCID: PMC4173152 DOI: 10.1101/gad.246579.114] [Citation(s) in RCA: 109] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
ZNF750 controls epithelial homeostasis by inhibiting progenitor genes while inducing differentiation genes. Here, Boxer et al. characterized ZNF750 as a transcription factor that binds both the progenitor and differentiation genes that it controls at a CCNNAGGC DNA motif. ZNF750 controls differentiation in concert with RCOR1 and CTBP1/2 by acting with either KDM1A to repress progenitor genes or KLF4 to induce differentiation genes. ZNF750 controls epithelial homeostasis by inhibiting progenitor genes while inducing differentiation genes, a role underscored by pathogenic ZNF750 mutations in cancer and psoriasis. How ZNF750 accomplishes these dual gene regulatory impacts is unknown. Here, we characterized ZNF750 as a transcription factor that binds both the progenitor and differentiation genes that it controls at a CCNNAGGC DNA motif. ZNF750 interacts with the pluripotency transcription factor KLF4 and chromatin regulators RCOR1, KDM1A, and CTBP1/2 through conserved PLNLS sequences. ChIP-seq (chromatin immunoprecipitation [ChIP] followed by high-throughput sequencing) and gene depletion revealed that KLF4 colocalizes ∼10 base pairs from ZNF750 at differentiation target genes to facilitate their activation but is unnecessary for ZNF750-mediated progenitor gene repression. In contrast, KDM1A colocalizes with ZNF750 at progenitor genes and facilitates their repression but is unnecessary for ZNF750-driven differentiation. ZNF750 thus controls differentiation in concert with RCOR1 and CTBP1/2 by acting with either KDM1A to repress progenitor genes or KLF4 to induce differentiation genes.
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Affiliation(s)
- Lisa D Boxer
- Program in Epithelial Biology, Stanford University School of Medicine, Stanford, California 94305, USA; Department of Biology, Stanford University, Stanford, California 94305, USA
| | - Brook Barajas
- Program in Epithelial Biology, Stanford University School of Medicine, Stanford, California 94305, USA
| | - Shiying Tao
- Program in Epithelial Biology, Stanford University School of Medicine, Stanford, California 94305, USA
| | - Jiajing Zhang
- Program in Epithelial Biology, Stanford University School of Medicine, Stanford, California 94305, USA
| | - Paul A Khavari
- Program in Epithelial Biology, Stanford University School of Medicine, Stanford, California 94305, USA; Veterans Affairs Palo Alto Healthcare System, Palo Alto, California 94304, USA
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Frietze S, O'Geen H, Littlepage LE, Simion C, Sweeney CA, Farnham PJ, Krig SR. Global analysis of ZNF217 chromatin occupancy in the breast cancer cell genome reveals an association with ERalpha. BMC Genomics 2014; 15:520. [PMID: 24962896 PMCID: PMC4082627 DOI: 10.1186/1471-2164-15-520] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2014] [Accepted: 06/18/2014] [Indexed: 02/03/2023] Open
Abstract
BACKGROUND The ZNF217 gene, encoding a C2H2 zinc finger protein, is located at 20q13 and found amplified and overexpressed in greater than 20% of breast tumors. Current studies indicate ZNF217 drives tumorigenesis, yet the regulatory mechanisms of ZNF217 are largely unknown. Because ZNF217 associates with chromatin modifying enzymes, we postulate that ZNF217 functions to regulate specific gene signaling networks. Here, we present a large-scale functional genomic analysis of ZNF217, which provides insights into the regulatory role of ZNF217 in MCF7 breast cancer cells. RESULTS ChIP-seq analysis reveals that the majority of ZNF217 binding sites are located at distal regulatory regions associated with the chromatin marks H3K27ac and H3K4me1. Analysis of ChIP-seq transcription factor binding sites shows clustering of ZNF217 with FOXA1, GATA3 and ERalpha binding sites, supported by the enrichment of corresponding motifs for the ERalpha-associated cis-regulatory sequences. ERalpha expression highly correlates with ZNF217 in lysates from breast tumors (n = 15), and ERalpha co-precipitates ZNF217 and its binding partner CtBP2 from nuclear extracts. Transcriptome profiling following ZNF217 depletion identifies differentially expressed genes co-bound by ZNF217 and ERalpha; gene ontology suggests a role for ZNF217-ERalpha in expression programs associated with ER+ breast cancer studies found in the Molecular Signature Database. Data-mining of expression data from breast cancer patients correlates ZNF217 with reduced overall survival. CONCLUSIONS Our genome-wide ZNF217 data suggests a functional role for ZNF217 at ERalpha target genes. Future studies will investigate whether ZNF217 expression contributes to aberrant ERalpha regulatory events in ER+ breast cancer and hormone resistance.
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Affiliation(s)
- Seth Frietze
- School of Biological Sciences, University of Northern Colorado, Greeley, CO 80639, USA.
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A functional interplay between ZNF217 and estrogen receptor alpha exists in luminal breast cancers. Mol Oncol 2014; 8:1441-57. [PMID: 24973012 DOI: 10.1016/j.molonc.2014.05.013] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2014] [Revised: 05/26/2014] [Accepted: 05/26/2014] [Indexed: 01/15/2023] Open
Abstract
We aimed at highlighting the role of ZNF217, a Krüppel-like finger protein, in Estrogen Receptor-α (ERα)-positive (ER+) and luminal breast cancers. Here we report for the first time that ZNF217 and ERα proteins bind to each other in both breast cancer cells and breast tumour samples, via the ERα hinge domain and the ZNF217 C-terminal domain. ZNF217 enhances the recruitment of ERα to its estrogen response elements (ERE) and the ERα-dependent transcription of the GREB1 estrogen-regulated gene. The prognostic power of ZNF217 mRNA expression levels is most discriminatory in breast cancers classified with a "good prognosis", particularly the Luminal-A subclass. A new immunohistochemistry ZNF217 index, based on nuclear and cytoplasmic ZNF217 staining, also allowed the identification of intermediate/poor relapse-free survivors in the Luminal-A subgroup. ZNF217 confers tamoxifen resistance in ER+ breast cancer cells and is a predictor of relapse under endocrine therapy in patients with ER+ breast cancer. ZNF217 thus allows the re-stratification of patients with ER+ breast cancers considered as cancers with good prognosis where no other biomarkers are currently available and widely used. Here we propose a model in ER+ breast cancer where ZNF217-driven aggressiveness incorporates ZNF217 as a positive enhancer of ERα direct genomic activity and where ZNF217 possesses its highest discriminatory prognostic value.
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Hilbert BJ, Grossman SR, Schiffer CA, Royer WE. Crystal structures of human CtBP in complex with substrate MTOB reveal active site features useful for inhibitor design. FEBS Lett 2014; 588:1743-8. [PMID: 24657618 DOI: 10.1016/j.febslet.2014.03.026] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2013] [Revised: 03/10/2014] [Accepted: 03/11/2014] [Indexed: 10/25/2022]
Abstract
The oncogenic corepressors C-terminal Binding Protein (CtBP) 1 and 2 harbor regulatory d-isomer specific 2-hydroxyacid dehydrogenase (d2-HDH) domains. 4-Methylthio 2-oxobutyric acid (MTOB) exhibits substrate inhibition and can interfere with CtBP oncogenic activity in cell culture and mice. Crystal structures of human CtBP1 and CtBP2 in complex with MTOB and NAD(+) revealed two key features: a conserved tryptophan that likely contributes to substrate specificity and a hydrophilic cavity that links MTOB with an NAD(+) phosphate. Neither feature is present in other d2-HDH enzymes. These structures thus offer key opportunities for the development of highly selective anti-neoplastic CtBP inhibitors.
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Affiliation(s)
- Brendan J Hilbert
- Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, MA 01605, USA
| | - Steven R Grossman
- Division of Hematology, Oncology, and Palliative Care and Massey Cancer Center, Virginia Commonwealth University, Richmond, VA 23298, USA
| | - Celia A Schiffer
- Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, MA 01605, USA
| | - William E Royer
- Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, MA 01605, USA.
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Birts CN, Nijjar SK, Mardle CA, Hoakwie F, Duriez PJ, Blaydes JP, Tavassoli A. A cyclic peptide inhibitor of C-terminal binding protein dimerization links metabolism with mitotic fidelity in breast cancer cells. Chem Sci 2013; 4:3046-3057. [PMID: 30450179 PMCID: PMC6237275 DOI: 10.1039/c3sc50481f] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Identification of direct modulators of transcription factor protein-protein interactions is a key challenge for ligand discovery that promises to significantly advance current approaches to cancer therapy. Here, we report an inhibitor of NADH-dependent dimerization of the C-terminal binding protein (CtBP) transcriptional repressor, identified by screening genetically encoded cyclic peptide libraries of up to 64 million members. CtBP dimers form the core of transcription complexes associated with epigenetic regulation of multiple genes that control many characteristics of cancer cells, including proliferation, survival and migration. CtBP monomers also have distinct and critical cellular function, thus current experimental tools that deplete all forms of a targeted protein (e.g. siRNA) do not allow the cellular consequences of this metabolically regulated transcription factor to be deciphered. The most potent inhibitor from our screen (cyclo-SGWTVVRMY) is demonstrated to disrupt CtBP dimerization in vitro and in cells. This compound is used as a chemical tool to establish that the NADH-dependent dimerization of CtBPs regulates the maintenance of mitotic fidelity in cancer cells. Treatment of highly glycolytic breast cancer cell lines with the identified inhibitor significantly reduced their mitotic fidelity, proliferation and colony forming potential, whereas the compound does not affect mitotic fidelity of cells with lower glycolytic flux. This work not only links the altered metabolic state of transformed cells to a key determinant of the tumor cell phenotype, but the uncovered compound also serves as the starting point for the development of potential therapeutic agents that target tumors by disrupting the CtBP chromatin-modifying complex.
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Affiliation(s)
- Charles N Birts
- Chemistry, University of Southampton, Southampton, SO17 1BJ, UK
- Cancer Sciences, Faculty of Medicine, University of Southampton, Southampton, SO16 6YD, UK
| | - Sharandip K Nijjar
- Chemistry, University of Southampton, Southampton, SO17 1BJ, UK
- Cancer Sciences, Faculty of Medicine, University of Southampton, Southampton, SO16 6YD, UK
| | - Charlotte A Mardle
- Chemistry, University of Southampton, Southampton, SO17 1BJ, UK
- Cancer Sciences, Faculty of Medicine, University of Southampton, Southampton, SO16 6YD, UK
| | | | - Patrick J Duriez
- Cancer Sciences, Faculty of Medicine, University of Southampton, Southampton, SO16 6YD, UK
| | - Jeremy P Blaydes
- Cancer Sciences, Faculty of Medicine, University of Southampton, Southampton, SO16 6YD, UK
- Institute for Life Sciences, University of Southampton, UK
| | - Ali Tavassoli
- Chemistry, University of Southampton, Southampton, SO17 1BJ, UK
- Cancer Sciences, Faculty of Medicine, University of Southampton, Southampton, SO16 6YD, UK
- Institute for Life Sciences, University of Southampton, UK
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Subramanian T, Zhao LJ, Chinnadurai G. Interaction of CtBP with adenovirus E1A suppresses immortalization of primary epithelial cells and enhances virus replication during productive infection. Virology 2013; 443:313-20. [PMID: 23747199 DOI: 10.1016/j.virol.2013.05.018] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2013] [Revised: 04/29/2013] [Accepted: 05/10/2013] [Indexed: 10/26/2022]
Abstract
Adenovirus E1A induces cell proliferation, oncogenic transformation and promotes viral replication through interaction with p300/CBP, TRRAP/p400 multi-protein complex and the retinoblastoma (pRb) family proteins through distinct domains in the E1A N-terminal region. The C-terminal region of E1A suppresses E1A/Ras co-transformation and interacts with FOXK1/K2, DYRK1A/1B/HAN11 and CtBP1/2 (CtBP) protein complexes. To specifically dissect the role of CtBP interaction with E1A, we engineered a mutation (DL→AS) within the CtBP-binding motif, PLDLS, and investigated the effect of the mutation on immortalization and Ras cooperative transformation of primary cells and viral replication. Our results suggest that CtBP-E1A interaction suppresses immortalization and Ras co-operative transformation of primary rodent epithelial cells without significantly influencing the tumorigenic activities of transformed cells in immunodeficient and immunocompetent animals. During productive infection, CtBP-E1A interaction enhances viral replication in human cells. Between the two CtBP family proteins, CtBP2 appears to restrict viral replication more than CtBP1 in human cells.
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Affiliation(s)
- T Subramanian
- Institute for Molecular Virology, Saint Louis University Health Sciences Center, Doisy Research Center, 1100 South Grand Blvd., Saint Louis, MO 63104, USA
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Prestat E, de Morais SR, Vendrell JA, Thollet A, Gautier C, Cohen PA, Aussem A. Learning the local Bayesian network structure around the ZNF217 oncogene in breast tumours. Comput Biol Med 2013; 43:334-41. [PMID: 23375235 DOI: 10.1016/j.compbiomed.2012.12.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2011] [Revised: 07/23/2012] [Accepted: 12/07/2012] [Indexed: 01/18/2023]
Abstract
In this study, we discuss and apply a novel and efficient algorithm for learning a local Bayesian network model in the vicinity of the ZNF217 oncogene from breast cancer microarray data without having to decide in advance which genes have to be included in the learning process. ZNF217 is a candidate oncogene located at 20q13, a chromosomal region frequently amplified in breast and ovarian cancer, and correlated with shorter patient survival in these cancers. To properly address the difficulties in managing complex gene interactions given our limited sample, statistical significance of edge strengths was evaluated using bootstrapping and the less reliable edges were pruned to increase the network robustness. We found that 13 out of the 35 genes associated with deregulated ZNF217 expression in breast tumours have been previously associated with survival and/or prognosis in cancers. Identifying genes involved in lipid metabolism opens new fields of investigation to decipher the molecular mechanisms driven by the ZNF217 oncogene. Moreover, nine of the 13 genes have already been identified as putative ZNF217 targets by independent biological studies. We therefore suggest that the algorithms for inferring local BNs are valuable data mining tools for unraveling complex mechanisms of biological pathways from expression data. The source code is available at http://www710.univ-lyon1.fr/∼aaussem/Software.html.
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Verger A, Baert JL, Verreman K, Dewitte F, Ferreira E, Lens Z, de Launoit Y, Villeret V, Monté D. The Mediator complex subunit MED25 is targeted by the N-terminal transactivation domain of the PEA3 group members. Nucleic Acids Res 2013; 41:4847-59. [PMID: 23531547 PMCID: PMC3643604 DOI: 10.1093/nar/gkt199] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
PEA3, ERM and ER81 belong to the PEA3 subfamily of Ets transcription factors and play important roles in a number of tissue-specific processes. Transcriptional activation by PEA3 subfamily factors requires their characteristic amino-terminal acidic transactivation domain (TAD). However, the cellular targets of this domain remain largely unknown. Using ERM as a prototype, we show that the minimal N-terminal TAD activates transcription by contacting the activator interacting domain (ACID)/Prostate tumor overexpressed protein 1 (PTOV) domain of the Mediator complex subunit MED25. We further show that depletion of MED25 disrupts the association of ERM with the Mediator in vitro. Small interfering RNA-mediated knockdown of MED25 as well as the overexpression of MED25-ACID and MED25-VWA domains efficiently inhibit the transcriptional activity of ERM. Moreover, mutations of amino acid residues that prevent binding of MED25 to ERM strongly reduce transactivation by ERM. Finally we show that siRNA depletion of MED25 diminishes PEA3-driven expression of MMP-1 and Mediator recruitment. In conclusion, this study identifies the PEA3 group members as the first human transcriptional factors that interact with the MED25 ACID/PTOV domain and establishes MED25 as a crucial transducer of their transactivation potential.
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Affiliation(s)
- Alexis Verger
- IRI USR 3078 CNRS, Parc CNRS de la Haute Borne, 50 avenue de Halley, B.P. 70478, 59658 Villeneuve d'Ascq Cedex, France
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Bai Y, Vaddepalli P, Fulton L, Bhasin H, Hülskamp M, Schneitz K. ANGUSTIFOLIA is a central component of tissue morphogenesis mediated by the atypical receptor-like kinase STRUBBELIG. BMC PLANT BIOLOGY 2013; 13:16. [PMID: 23368817 PMCID: PMC3599385 DOI: 10.1186/1471-2229-13-16] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2013] [Accepted: 01/29/2013] [Indexed: 05/03/2023]
Abstract
BACKGROUND During plant tissue morphogenesis cells have to coordinate their behavior to allow the generation of the size, shape and cellular patterns that distinguish an organ. Despite impressive progress the underlying signaling pathways remain largely unexplored. In Arabidopsis thaliana, the atypical leucine-rich repeat receptor-like kinase STRUBBELIG (SUB) is involved in signal transduction in several developmental processes including the formation of carpels, petals, ovules and root hair patterning. The three STRUBBELIG-LIKE MUTANT (SLM) genes DETORQUEO (DOQ), QUIRKY (QKY) and ZERZAUST (ZET) are considered central elements of SUB-mediated signal transduction pathways as corresponding mutants share most phenotypic aspects with sub mutants. RESULTS Here we show that DOQ corresponds to the previously identified ANGUSTIFOLIA gene. The genetic analysis revealed that the doq-1 mutant exhibits all additional mutant phenotypes and conversely that other an alleles show the slm phenotypes. We further provide evidence that SUB and AN physically interact and that AN is not required for subcellular localization of SUB. CONCLUSIONS Our data suggest that AN is involved in SUB signal transduction pathways. In addition, they reveal previously unreported functions of AN in several biological processes, such as ovule development, cell morphogenesis in floral meristems, and root hair patterning. Finally, SUB and AN may directly interact at the plasma membrane to mediate SUB-dependent signaling.
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Affiliation(s)
- Yang Bai
- Botanisches Institut III, Universität Köln, Zülpicher Straße 47b, 50674, Köln, Germany
- Present address: Department of Plant Microbe Interactions, Max Planck Institute for Plant Breeding Research, Carl-von-Linné-Weg 10, 50829, Köln, Germany
| | - Prasad Vaddepalli
- Entwicklungsbiologie der Pflanzen, Wissenschaftszentrum Weihenstephan, Technische Universität München, Emil-Ramann-Str. 4, 85354, Freising, Germany
| | - Lynette Fulton
- Entwicklungsbiologie der Pflanzen, Wissenschaftszentrum Weihenstephan, Technische Universität München, Emil-Ramann-Str. 4, 85354, Freising, Germany
- Present address: School of Biological Sciences, Monash University, 3800, Melbourne, VIC, Australia
| | - Hemal Bhasin
- Botanisches Institut III, Universität Köln, Zülpicher Straße 47b, 50674, Köln, Germany
| | - Martin Hülskamp
- Botanisches Institut III, Universität Köln, Zülpicher Straße 47b, 50674, Köln, Germany
| | - Kay Schneitz
- Entwicklungsbiologie der Pflanzen, Wissenschaftszentrum Weihenstephan, Technische Universität München, Emil-Ramann-Str. 4, 85354, Freising, Germany
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Hohenauer T, Moore AW. The Prdm family: expanding roles in stem cells and development. Development 2012; 139:2267-82. [PMID: 22669819 DOI: 10.1242/dev.070110] [Citation(s) in RCA: 184] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Members of the Prdm family are characterized by an N-terminal PR domain that is related to the SET methyltransferase domain, and multiple zinc fingers that mediate sequence-specific DNA binding and protein-protein interactions. Prdm factors either act as direct histone methyltransferases or recruit a suite of histone-modifying enzymes to target promoters. In this way, they function in many developmental contexts to drive and maintain cell state transitions and to modify the activity of developmental signalling pathways. Here, we provide an overview of the structure and function of Prdm family members and discuss the roles played by these proteins in stem cells and throughout development.
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Affiliation(s)
- Tobias Hohenauer
- Disease Mechanism Research Core, RIKEN Brain Science Institute, Wako, Saitama, 351-0198, Japan
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Vendrell JA, Thollet A, Nguyen NT, Ghayad SE, Vinot S, Bièche I, Grisard E, Josserand V, Coll JL, Roux P, Corbo L, Treilleux I, Rimokh R, Cohen PA. ZNF217 Is a Marker of Poor Prognosis in Breast Cancer That Drives Epithelial–Mesenchymal Transition and Invasion. Cancer Res 2012; 72:3593-606. [DOI: 10.1158/0008-5472.can-11-3095] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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A regulatory potential of the Xist gene promoter in vole M. rossiaemeridionalis. PLoS One 2012; 7:e33994. [PMID: 22606223 PMCID: PMC3350511 DOI: 10.1371/journal.pone.0033994] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2011] [Accepted: 02/24/2012] [Indexed: 12/24/2022] Open
Abstract
X chromosome inactivation takes place in the early development of female mammals and depends on the Xist gene expression. The mechanisms of Xist expression regulation have not been well understood so far. In this work, we compared Xist promoter region of vole Microtus rossiaemeridionalis and other mammalian species. We observed three conserved regions which were characterized by computational analysis, DNaseI in vitro footprinting, and reporter construct assay. Regulatory factors potentially involved in Xist activation and repression in voles were determined. The role of CpG methylation in vole Xist expression regulation was established. A CTCF binding site was found in the 5' flanking region of the Xist promoter on the active X chromosome in both males and females. We suggest that CTCF acts as an insulator which defines an inactive Xist domain on the active X chromosome in voles.
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Littlepage LE, Adler AS, Kouros-Mehr H, Huang G, Chou J, Krig SR, Griffith OL, Korkola JE, Qu K, Lawson DA, Xue Q, Sternlicht MD, Dijkgraaf GJP, Yaswen P, Rugo HS, Sweeney CA, Collins CC, Gray JW, Chang HY, Werb Z. The transcription factor ZNF217 is a prognostic biomarker and therapeutic target during breast cancer progression. Cancer Discov 2012; 2:638-51. [PMID: 22728437 DOI: 10.1158/2159-8290.cd-12-0093] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
UNLABELLED The transcription factor ZNF217 is a candidate oncogene in the amplicon on chromosome 20q13 that occurs in 20% to 30% of primary human breast cancers and that correlates with poor prognosis. We show that Znf217 overexpression drives aberrant differentiation and signaling events, promotes increased self-renewal capacity, mesenchymal marker expression, motility, and metastasis, and represses an adult tissue stem cell gene signature downregulated in cancers. By in silico screening, we identified candidate therapeutics that at low concentrations inhibit growth of cancer cells expressing high ZNF217. We show that the nucleoside analogue triciribine inhibits ZNF217-induced tumor growth and chemotherapy resistance and inhibits signaling events [e.g., phospho-AKT, phospho-mitogen-activated protein kinase (MAPK)] in vivo. Our data suggest that ZNF217 is a biomarker of poor prognosis and a therapeutic target in patients with breast cancer and that triciribine may be part of a personalized treatment strategy in patients overexpressing ZNF217. Because ZNF217 is amplified in numerous cancers, these results have implications for other cancers. SIGNIFICANCE This study finds that ZNF217 is a poor prognostic indicator and therapeutic target in patients with breast cancer and may be a strong biomarker of triciribine treatment efficacy in patients. Because previous clinical trials for triciribine did not include biomarkers of treatment efficacy, this study provides a rationale for revisiting triciribine in the clinical setting as a therapy for patients with breast cancer who overexpress ZNF217.
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Affiliation(s)
- Laurie E Littlepage
- Department of Anatomy, University of California, San Francisco, CA 94143, USA
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Abstract
The Rb/E2F pathway is deregulated in virtually all human tumors. It is clear that, in addition to Rb itself, essential cofactors required for transcriptional repression and silencing of E2F target genes are mutated or lost in cancer. To identify novel cofactors required for Rb/E2F-mediated inhibition of cell proliferation, we performed a genome-wide short hairpin RNA screen. In addition to several known Rb cofactors, the screen identified components of the Mediator complex, a large multiprotein coactivator required for RNA polymerase II transcription. We show that the Mediator complex subunit MED13L is required for Rb/E2F control of cell growth, the complete repression of cell cycle target genes, and cell cycle inhibition.
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Nunez N, Clifton MMK, Funnell APW, Artuz C, Hallal S, Quinlan KGR, Font J, Vandevenne M, Setiyaputra S, Pearson RCM, Mackay JP, Crossley M. The multi-zinc finger protein ZNF217 contacts DNA through a two-finger domain. J Biol Chem 2011; 286:38190-38201. [PMID: 21908891 DOI: 10.1074/jbc.m111.301234] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Classical C2H2 zinc finger proteins are among the most abundant transcription factors found in eukaryotes, and the mechanisms through which they recognize their target genes have been extensively investigated. In general, a tandem array of three fingers separated by characteristic TGERP links is required for sequence-specific DNA recognition. Nevertheless, a significant number of zinc finger proteins do not contain a hallmark three-finger array of this type, raising the question of whether and how they contact DNA. We have examined the multi-finger protein ZNF217, which contains eight classical zinc fingers. ZNF217 is implicated as an oncogene and in repressing the E-cadherin gene. We show that two of its zinc fingers, 6 and 7, can mediate contacts with DNA. We examine its putative recognition site in the E-cadherin promoter and demonstrate that this is a suboptimal site. NMR analysis and mutagenesis is used to define the DNA binding surface of ZNF217, and we examine the specificity of the DNA binding activity using fluorescence anisotropy titrations. Finally, sequence analysis reveals that a variety of multi-finger proteins also contain two-finger units, and our data support the idea that these may constitute a distinct subclass of DNA recognition motif.
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Affiliation(s)
- Noelia Nunez
- School of Molecular Bioscience, University of Sydney, New South Wales 2006, Australia
| | - Molly M K Clifton
- School of Molecular Bioscience, University of Sydney, New South Wales 2006, Australia
| | - Alister P W Funnell
- School of Molecular Bioscience, University of Sydney, New South Wales 2006, Australia; School of Biotechnology and Biomolecular Sciences, University of New South Wales, New South Wales 2052, Australia
| | - Crisbel Artuz
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, New South Wales 2052, Australia
| | - Samantha Hallal
- School of Molecular Bioscience, University of Sydney, New South Wales 2006, Australia
| | - Kate G R Quinlan
- School of Molecular Bioscience, University of Sydney, New South Wales 2006, Australia
| | - Josep Font
- School of Molecular Bioscience, University of Sydney, New South Wales 2006, Australia
| | - Marylène Vandevenne
- School of Molecular Bioscience, University of Sydney, New South Wales 2006, Australia
| | - Surya Setiyaputra
- School of Molecular Bioscience, University of Sydney, New South Wales 2006, Australia
| | - Richard C M Pearson
- School of Molecular Bioscience, University of Sydney, New South Wales 2006, Australia; School of Biotechnology and Biomolecular Sciences, University of New South Wales, New South Wales 2052, Australia
| | - Joel P Mackay
- School of Molecular Bioscience, University of Sydney, New South Wales 2006, Australia
| | - Merlin Crossley
- School of Molecular Bioscience, University of Sydney, New South Wales 2006, Australia; School of Biotechnology and Biomolecular Sciences, University of New South Wales, New South Wales 2052, Australia.
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Mao XG, Yan M, Xue XY, Zhang X, Ren HG, Guo G, Wang P, Zhang W, Huo JL. Overexpression of ZNF217 in glioblastoma contributes to the maintenance of glioma stem cells regulated by hypoxia-inducible factors. J Transl Med 2011; 91:1068-78. [PMID: 21483406 DOI: 10.1038/labinvest.2011.56] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Glioblastoma multiforme (GBM) is the most aggressive and common kind of primary brain tumor in adults, and is thought to be driven by a subpopulation of glioma stem cells (GSCs). GSCs reside in a specialized hypoxic niche, which can regulate the tumorigenic capacity of GSCs primarily through the hypoxia-inducible factors (HIFs), HIF1α and HIF2α. ZNF217 is an oncogene frequently amplified in many kinds of tumors. It is associated with aggressive tumor behavior and poor clinical prognosis, but its role in gliomas is poorly known. Gene expression and copy number analysis from TCGA data reveal that ZNF217 is amplified in 32% and overexpressed in 71.2% of GBMs. Quantitative RT-PCR and western blotting of a cohort of glioma samples showed that ZNF217 was highly expressed in gliomas and increased with tumor grade. Analysis of a molecular database demonstrated that ZNF217 expression correlated with poor survival of glioma patients. Investigation of ZNF217 expression in GSCs, non-GSCs and normal neural stem cells (NSCs) indicated that ZNF217 was more highly expressed in GSCs than in non-GSCs and NSCs. Knockdown of ZNF217 in GSCs by small-interfering RNA (siRNA) inhibited their growth and promoted their differentiation. Interestingly, ZNF217 was upregulated in GSCs and the GBM cell line U87 when exposed to the hypoxic environment of 1% oxygen. Knockdown of either HIF1α or HIF2α, which has a central role in the hypoxia-induced responses of these cells, inhibited ZNF217 expression. In addition, ZNF217 upregulation was compromised under hypoxia in U87 and GSCs when either HIF1α or HIF2α was targeted by siRNA. HIF2α knockdown inhibited ZNF217 expression more efficiently in both normoxia and hypoxia than HIF1α knockdown. Therefore, ZNF217 is overexpressed in GBMs and contributes to the maintenance of GSCs, which is regulated by HIFs released by the hypoxic environment of the tumor.
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Affiliation(s)
- Xing-gang Mao
- Department of Neurosurgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi Province, China
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Jack BH, Pearson RC, Crossley M. C-terminal binding protein: A metabolic sensor implicated in regulating adipogenesis. Int J Biochem Cell Biol 2011; 43:693-6. [DOI: 10.1016/j.biocel.2011.01.017] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2010] [Revised: 01/21/2011] [Accepted: 01/21/2011] [Indexed: 12/31/2022]
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50
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Sumoylation of MEL1S at lysine 568 and its interaction with CtBP facilitates its repressor activity and the blockade of G-CSF-induced myeloid differentiation. Oncogene 2011; 30:4194-207. [DOI: 10.1038/onc.2011.132] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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