1
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Larue AEM, Atlasi Y. The epigenetic landscape in intestinal stem cells and its deregulation in colorectal cancer. Stem Cells 2024; 42:509-525. [PMID: 38597726 PMCID: PMC11177158 DOI: 10.1093/stmcls/sxae027] [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: 10/08/2023] [Accepted: 03/25/2024] [Indexed: 04/11/2024]
Abstract
Epigenetic mechanisms play a pivotal role in controlling gene expression and cellular plasticity in both normal physiology and pathophysiological conditions. These mechanisms are particularly important in the regulation of stem cell self-renewal and differentiation, both in embryonic development and within adult tissues. A prime example of this finely tuned epigenetic control is observed in the gastrointestinal lining, where the small intestine undergoes renewal approximately every 3-5 days. How various epigenetic mechanisms modulate chromatin functions in intestinal stem cells (ISCs) is currently an active area of research. In this review, we discuss the main epigenetic mechanisms that control ISC differentiation under normal homeostasis. Furthermore, we explore the dysregulation of these mechanisms in the context of colorectal cancer (CRC) development. By outlining the main epigenetic mechanisms contributing to CRC, we highlight the recent therapeutics development and future directions for colorectal cancer research.
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Affiliation(s)
- Axelle E M Larue
- Patrick G Johnston Centre for Cancer Research, Queen’s University Belfast, Belfast BT9 7AE, United Kingdom
| | - Yaser Atlasi
- Patrick G Johnston Centre for Cancer Research, Queen’s University Belfast, Belfast BT9 7AE, United Kingdom
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2
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Longhurst AD, Wang K, Suresh HG, Ketavarapu M, Ward HN, Jones IR, Narayan V, Hundley FV, Hassan AZ, Boone C, Myers CL, Shen Y, Ramani V, Andrews BJ, Toczyski DP. The PRC2.1 Subcomplex Opposes G1 Progression through Regulation of CCND1 and CCND2. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.03.18.585604. [PMID: 38562687 PMCID: PMC10983909 DOI: 10.1101/2024.03.18.585604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
Progression through the G1 phase of the cell cycle is the most highly regulated step in cellular division. We employed a chemogenomics approach to discover novel cellular networks that regulate cell cycle progression. This approach uncovered functional clusters of genes that altered sensitivity of cells to inhibitors of the G1/S transition. Mutation of components of the Polycomb Repressor Complex 2 rescued growth inhibition caused by the CDK4/6 inhibitor palbociclib, but not to inhibitors of S phase or mitosis. In addition to its core catalytic subunits, mutation of the PRC2.1 accessory protein MTF2, but not the PRC2.2 protein JARID2, rendered cells resistant to palbociclib treatment. We found that PRC2.1 (MTF2), but not PRC2.2 (JARID2), was critical for promoting H3K27me3 deposition at CpG islands genome-wide and in promoters. This included the CpG islands in the promoter of the CDK4/6 cyclins CCND1 and CCND2, and loss of MTF2 lead to upregulation of both CCND1 and CCND2. Our results demonstrate a role for PRC2.1, but not PRC2.2, in promoting G1 progression.
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Affiliation(s)
- Adam D Longhurst
- University of California, San Francisco, San Francisco, CA 94158, USA
- Tetrad Graduate Program, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Kyle Wang
- Department of Molecular Genetics, University of Toronto, 160 College Street, Toronto, Ontario M5S 3E1, Canada
- The Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, ON, Canada
| | - Harsha Garadi Suresh
- Department of Molecular Genetics, University of Toronto, 160 College Street, Toronto, Ontario M5S 3E1, Canada
| | - Mythili Ketavarapu
- Gladstone Institute for Data Science and Biotechnology, J. David Gladstone Institutes, San Francisco, CA, USA
- Department of Biochemistry and Biophysics, University of California San Francisco, San Francisco, CA, USA
| | - Henry N Ward
- Bioinformatics and Computational Biology Graduate Program, University of Minnesota - Twin Cities Minneapolis MN USA
| | - Ian R Jones
- Institute for Human Genetics, University of California, San Francisco, San Francisco, CA, USA
- Pharmaceutical Sciences and Pharmacogenomics Graduate Program, University of California
| | - Vivek Narayan
- Institute for Human Genetics, University of California, San Francisco, San Francisco, CA, USA
| | - Frances V Hundley
- University of California, San Francisco, San Francisco, CA 94158, USA
- Tetrad Graduate Program, University of California, San Francisco, San Francisco, CA 94158, USA
- Department of Cell Biology, Blavatnik Institute of Harvard Medical School, Boston, MA 02115, USA
| | - Arshia Zernab Hassan
- Department of Computer Science and Engineering, University of Minnesota - Twin Cities Minneapolis MN USA
| | - Charles Boone
- Department of Molecular Genetics, University of Toronto, 160 College Street, Toronto, Ontario M5S 3E1, Canada
- The Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, ON, Canada
| | - Chad L Myers
- Bioinformatics and Computational Biology Graduate Program, University of Minnesota - Twin Cities Minneapolis MN USA
- Department of Cell Biology, Blavatnik Institute of Harvard Medical School, Boston, MA 02115, USA
| | - Yin Shen
- Institute for Human Genetics, University of California, San Francisco, San Francisco, CA, USA
- Department of Neurology, University of California, San Francisco, San Francisco, CA, USA
- Weill Institute for Neurosciences, University of California, San Francisco, San Francisco, CA, USA
| | - Vijay Ramani
- Gladstone Institute for Data Science and Biotechnology, J. David Gladstone Institutes, San Francisco, CA, USA
- Department of Biochemistry and Biophysics, University of California San Francisco, San Francisco, CA, USA
| | - Brenda J Andrews
- The Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, ON, Canada
| | - David P Toczyski
- University of California, San Francisco, San Francisco, CA 94158, USA
- Department of Biochemistry and Biophysics, University of California San Francisco, San Francisco, CA, USA
- Weill Institute for Neurosciences, University of California, San Francisco, San Francisco, CA, USA
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3
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Wydorski PJ, Kozlowska W, Zmijewska A, Franczak A. Exposure to the extremely low-frequency electromagnetic field induces changes in the epigenetic regulation of gene expression in the endometrium. Theriogenology 2024; 217:72-82. [PMID: 38262222 DOI: 10.1016/j.theriogenology.2024.01.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 01/10/2024] [Accepted: 01/14/2024] [Indexed: 01/25/2024]
Abstract
Increasing technological development results in more sources of the extremely low-frequency electromagnetic field (ELF-EMF), which is recognized as an environmental risk factor. The results of the past study indicate that the ELF-EMF can affect the level of DNA methylation. The study aimed to determine whether the ELF-EMF induces changes in epigenetic regulation of gene expression in the endometrium of pigs during the peri-implantation period. Endometrial slices (100 ± 5 mg) collected on days 15-16 of pregnancy were exposed in vitro to the ELF-EMF at a frequency of 50 Hz for 2 h of treatment duration. To determine the impact of the ELF-EMF on elements of epigenetic regulations involved in DNA methylation, histone modification, and microRNA biogenesis in the endometrium, the DNMT1 and DNMT3a; EZH2, UHRF1, and MBD1; DICER1 and DGCR8 mRNA transcript and protein abundance were analyzed using Real-Time PCR and Western blot, respectively. Moreover, EED and SUZ12 mRNA transcript, global DNA methylation, and the activity of histone deacetylase (HDAC) were analyzed. The changes in the abundance of DNMT1 and DNMT3a, EZH2 mRNA transcript and protein, EED and SUZ12 mRNA transcript, global DNA methylation level, HDAC activity, and the abundance of proteins involved in microRNA biogenesis evoked by the ELF-EMF in the endometrium were observed. The ELF-EMF possesses the potential to alter epigenetic regulation of gene expression in the porcine endometrium. Observed alterations may be the reason for changes in the transcriptomic profile of the endometrium exposed to the ELF-EMF which in turn may disrupt biological processes in the uterus during peri-implantation.
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Affiliation(s)
- Pawel Jozef Wydorski
- Department of Animal Anatomy and Physiology, Faculty of Biology and Biotechnology, University of Warmia and Mazury in Olsztyn, Oczapowskiego 1A, 10-719, Olsztyn, Poland.
| | - Wiktoria Kozlowska
- Department of Animal Anatomy and Physiology, Faculty of Biology and Biotechnology, University of Warmia and Mazury in Olsztyn, Oczapowskiego 1A, 10-719, Olsztyn, Poland.
| | - Agata Zmijewska
- Department of Animal Anatomy and Physiology, Faculty of Biology and Biotechnology, University of Warmia and Mazury in Olsztyn, Oczapowskiego 1A, 10-719, Olsztyn, Poland.
| | - Anita Franczak
- Department of Animal Anatomy and Physiology, Faculty of Biology and Biotechnology, University of Warmia and Mazury in Olsztyn, Oczapowskiego 1A, 10-719, Olsztyn, Poland.
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4
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VanDyke D, Xu L, Sargunas PR, Gilbreth RN, Baca M, Gao C, Hunt J, Spangler JB. Redirecting the specificity of tripartite motif containing-21 scaffolds using a novel discovery and design approach. J Biol Chem 2023; 299:105381. [PMID: 37866632 PMCID: PMC10694607 DOI: 10.1016/j.jbc.2023.105381] [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: 04/05/2023] [Revised: 09/30/2023] [Accepted: 10/16/2023] [Indexed: 10/24/2023] Open
Abstract
Hijacking the ubiquitin proteasome system to elicit targeted protein degradation (TPD) has emerged as a promising therapeutic strategy to target and destroy intracellular proteins at the post-translational level. Small molecule-based TPD approaches, such as proteolysis-targeting chimeras (PROTACs) and molecular glues, have shown potential, with several agents currently in clinical trials. Biological PROTACs (bioPROTACs), which are engineered fusion proteins comprised of a target-binding domain and an E3 ubiquitin ligase, have emerged as a complementary approach for TPD. Here, we describe a new method for the evolution and design of bioPROTACs. Specifically, engineered binding scaffolds based on the third fibronectin type III domain of human tenascin-C (Tn3) were installed into the E3 ligase tripartite motif containing-21 (TRIM21) to redirect its degradation specificity. This was achieved via selection of naïve yeast-displayed Tn3 libraries against two different oncogenic proteins associated with B-cell lymphomas, mucosa-associated lymphoid tissue lymphoma translocation protein 1 (MALT1) and embryonic ectoderm development protein (EED), and replacing the native substrate-binding domain of TRIM21 with our evolved Tn3 domains. The resulting TRIM21-Tn3 fusion proteins retained the binding properties of the Tn3 as well as the E3 ligase activity of TRIM21. Moreover, we demonstrated that TRIM21-Tn3 fusion proteins efficiently degraded their respective target proteins through the ubiquitin proteasome system in cellular models. We explored the effects of binding domain avidity and E3 ligase utilization to gain insight into the requirements for effective bioPROTAC design. Overall, this study presents a versatile engineering approach that could be used to design and engineer TRIM21-based bioPROTACs against therapeutic targets.
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Affiliation(s)
- Derek VanDyke
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, Maryland, USA; Translational Tissue Engineering Center, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA; Biologics Engineering, R&D, AstraZeneca, Gaithersburg, Maryland, USA
| | - Linda Xu
- Biologics Engineering, R&D, AstraZeneca, Gaithersburg, Maryland, USA
| | - Paul R Sargunas
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, Maryland, USA; Translational Tissue Engineering Center, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Ryan N Gilbreth
- Biologics Engineering, R&D, AstraZeneca, Gaithersburg, Maryland, USA
| | - Manuel Baca
- Biologics Engineering, R&D, AstraZeneca, Gaithersburg, Maryland, USA
| | - Changshou Gao
- Biologics Engineering, R&D, AstraZeneca, Gaithersburg, Maryland, USA
| | - James Hunt
- Biologics Engineering, R&D, AstraZeneca, Cambridge, UK
| | - Jamie B Spangler
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, Maryland, USA; Translational Tissue Engineering Center, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA; Bloomberg∼Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University, Baltimore, Maryland, USA; Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, Maryland, USA; Department of Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA; Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA; Department of Ophthalmology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.
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5
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Abstract
Proteolysis-targeting chimeras (PROTACs) are heterobifunctional small molecules that induce the ternary complex formation between a protein-of-interest (POI) and an E3 ligase, leading to targeted polyubiquitination and degradation of the POI. Particularly, PROTACs have the distinct advantage of targeting both canonical and noncanonical functions of epigenetic targets over traditional inhibitors, which typically target canonical functions only, resulting in greater therapeutic efficacy. In this review, we methodically analyze published PROTAC degraders of epigenetic writer, reader, and eraser proteins and their in vitro and in vivo effects. We highlight the mechanism of action of these degraders and their advantages in targeting both canonical and noncanonical functions of epigenetic targets in the context of cancer treatment. Furthermore, we present a future outlook for this exciting field. Overall, pharmacological degradation of epigenetic targets has emerged as an effective and attractive strategy to thwart cancer progression and growth.
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Affiliation(s)
- Md Kabir
- Mount Sinai Center for Therapeutics Discovery, Departments of Pharmacological Sciences, Oncological Sciences and Neuroscience, Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, New York 10029, USA.
| | - Xufen Yu
- Mount Sinai Center for Therapeutics Discovery, Departments of Pharmacological Sciences, Oncological Sciences and Neuroscience, Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, New York 10029, USA.
| | - H Ümit Kaniskan
- Mount Sinai Center for Therapeutics Discovery, Departments of Pharmacological Sciences, Oncological Sciences and Neuroscience, Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, New York 10029, USA.
| | - Jian Jin
- Mount Sinai Center for Therapeutics Discovery, Departments of Pharmacological Sciences, Oncological Sciences and Neuroscience, Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, New York 10029, USA.
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6
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Xu H, Zheng Y, Chen D, Cheng Y, Fang X, Zhong C, Huang X, Huang Q, Xu J, Xu J, Xue C. Branch-Shaped Trapping Device Regulates Accelerated Catalyzed Hairpin Assembly and Its Application for MicroRNA In Situ Imaging. Anal Chem 2023; 95:1210-1218. [PMID: 36583970 DOI: 10.1021/acs.analchem.2c03956] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Enzyme-free DNA strand displacement process is often practical when detecting miRNAs expressed at low levels in living cells. However, the poor kinetics, tedious reaction period, and multicomponent system hamper its in vivo applications to a great extent. Herein, we design a branch-shaped trapping device (BTD)-based spatial confinement reactor and applied it for accelerated miRNA in situ imaging. The reactor consists of a pair of trapped probe-based catalyzed hairpin assembly (T-CHA) reactions attached around the BTD. The trapping device naturally offered CHA reactions a good spatial-confinement effect by integrating the metastable probes (MHPa and MHPb) of the traditional CHA with the four-branched arm of BTD, which greatly improved the localized concentration of probes and shortened their physical distance. The autonomous and progressive walk of miRNA on the four-arm nanoprobes via T-CHA can rapidly tie numerous four-arm nanoprobes into figure-of-eight nanoknots (FENs), yielding strong fluorescence that is proportional to the miRNA expression level. The unique nanoarchitecture of the FEN also benefits the restricted freedom of movement (FOM) in a confined cellular environment, which makes the system ideally suitable for in situ imaging of intracellular miRNAs. In vitro and in situ analyses also demonstrated that the T-CHA overall outperformed the dissociative probe-based CHA (D-CHA) in stability, reaction speed, and amplification sensitivity. The final application of the T-CHA-based four-arm nanoprobe for imagings of both cancer cells and normal cells shows the potential of the platform for accurately and timely revealing miRNA in biological systems.
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Affiliation(s)
- Huo Xu
- College of Materials and Chemical Engineering, Minjiang University, Fuzhou 350108, Fujian, China
| | - Yanhui Zheng
- College of Materials and Chemical Engineering, Minjiang University, Fuzhou 350108, Fujian, China
| | - Danlong Chen
- College of Materials and Chemical Engineering, Minjiang University, Fuzhou 350108, Fujian, China
| | - Yinghao Cheng
- Key Laboratory of Laboratory Medicine, Ministry of Education of China, and Zhejiang Provincial Key Laboratory of Medical Genetics, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou 325035, China
| | - Xiaojun Fang
- College of Materials and Chemical Engineering, Minjiang University, Fuzhou 350108, Fujian, China
| | - Chunlian Zhong
- College of Materials and Chemical Engineering, Minjiang University, Fuzhou 350108, Fujian, China
| | - Xinmei Huang
- College of Materials and Chemical Engineering, Minjiang University, Fuzhou 350108, Fujian, China
| | - Qi Huang
- College of Materials and Chemical Engineering, Minjiang University, Fuzhou 350108, Fujian, China
| | - Jiawei Xu
- College of Materials and Chemical Engineering, Minjiang University, Fuzhou 350108, Fujian, China
| | - Jianguo Xu
- Engineering Research Center of Bio-process, Ministry of Education, School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, China
| | - Chang Xue
- Key Laboratory of Laboratory Medicine, Ministry of Education of China, and Zhejiang Provincial Key Laboratory of Medical Genetics, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou 325035, China
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7
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Guo Y, Yu Y, Wang GG. Polycomb Repressive Complex 2 in Oncology. Cancer Treat Res 2023; 190:273-320. [PMID: 38113005 DOI: 10.1007/978-3-031-45654-1_9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2023]
Abstract
Dynamic regulation of the chromatin state by Polycomb Repressive Complex 2 (PRC2) provides an important mean for epigenetic gene control that can profoundly influence normal development and cell lineage specification. PRC2 and PRC2-induced methylation of histone H3 lysine 27 (H3K27) are critically involved in a wide range of DNA-templated processes, which at least include transcriptional repression and gene imprinting, organization of three-dimensional chromatin structure, DNA replication and DNA damage response and repair. PRC2-based genome regulation often goes wrong in diseases, notably cancer. This chapter discusses about different modes-of-action through which PRC2 and EZH2, a catalytic subunit of PRC2, mediate (epi)genomic and transcriptomic regulation. We will also discuss about how alteration or mutation of the PRC2 core or axillary component promotes oncogenesis, how post-translational modification regulates functionality of EZH2 and PRC2, and how PRC2 and other epigenetic pathways crosstalk. Lastly, we will briefly touch on advances in targeting EZH2 and PRC2 dependence as cancer therapeutics.
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Affiliation(s)
- Yiran Guo
- Department of Pharmacology and Cancer Biology, Duke University School of Medicine, Durham, NC, 27710, USA.
- Duke Cancer Institute, Duke University School of Medicine, Durham, NC, 27710, USA.
| | - Yao Yu
- Department of Pharmacology and Cancer Biology, Duke University School of Medicine, Durham, NC, 27710, USA
- Duke Cancer Institute, Duke University School of Medicine, Durham, NC, 27710, USA
| | - Gang Greg Wang
- Department of Pharmacology and Cancer Biology, Duke University School of Medicine, Durham, NC, 27710, USA.
- Duke Cancer Institute, Duke University School of Medicine, Durham, NC, 27710, USA.
- Department of Pathology, Duke University School of Medicine, Durham, NC, 27710, USA.
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8
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Day CA, Hinchcliffe EH, Robinson JP. H3K27me3 in Diffuse Midline Glioma and Epithelial Ovarian Cancer: Opposing Epigenetic Changes Leading to the Same Poor Outcomes. Cells 2022; 11:cells11213376. [PMID: 36359771 PMCID: PMC9655269 DOI: 10.3390/cells11213376] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 10/19/2022] [Accepted: 10/24/2022] [Indexed: 11/29/2022] Open
Abstract
Histone post-translational modifications modulate gene expression through epigenetic gene regulation. The core histone H3 family members, H3.1, H3.2, and H3.3, play a central role in epigenetics. H3 histones can acquire many post-translational modifications, including the trimethylation of H3K27 (H3K27me3), which represses transcription. Triple methylation of H3K27 is performed by the histone methyltransferase Enhancer of Zeste Homologue 2 (EZH2), a component of the Polycomb Repressive Complex 2. Both global increases and decreases in H3K27me3 have been implicated in a wide range of cancer types. Here, we explore how opposing changes in H3K27me3 contribute to cancer by highlighting its role in two vastly different cancer types; (1) a form of glioma known as diffuse midline glioma H3K27-altered and (2) epithelial ovarian cancer. These two cancers vary widely in the age of onset, sex, associated mutations, and cell and organ type. However, both diffuse midline glioma and ovarian cancer have dysregulation of H3K27 methylation, triggering changes to the cancer cell transcriptome. In diffuse midline glioma, the loss of H3K27 methylation is a primary driving factor in tumorigenesis that promotes glial cell stemness and silences tumor suppressor genes. Conversely, hypermethylation of H3K27 occurs in late-stage epithelial ovarian cancer, which promotes tumor vascularization and tumor cell migration. By using each cancer type as a case study, this review emphasizes the importance of H3K27me3 in cancer while demonstrating that the mechanisms of histone H3 modification and subsequent gene expression changes are not a one-size-fits-all across cancer types.
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Affiliation(s)
- Charles A. Day
- Hormel Institute, University of Minnesota, Austin, MN 55912, USA
- Mayo Clinic, Rochester, MN 55902, USA
- Correspondence:
| | - Edward H. Hinchcliffe
- Hormel Institute, University of Minnesota, Austin, MN 55912, USA
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN 55455, USA
| | - James P. Robinson
- Hormel Institute, University of Minnesota, Austin, MN 55912, USA
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN 55455, USA
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9
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Critical Roles of Polycomb Repressive Complexes in Transcription and Cancer. Int J Mol Sci 2022; 23:ijms23179574. [PMID: 36076977 PMCID: PMC9455514 DOI: 10.3390/ijms23179574] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2022] [Revised: 08/16/2022] [Accepted: 08/18/2022] [Indexed: 11/17/2022] Open
Abstract
Polycomp group (PcG) proteins are members of highly conserved multiprotein complexes, recognized as gene transcriptional repressors during development and shown to play a role in various physiological and pathological processes. PcG proteins consist of two Polycomb repressive complexes (PRCs) with different enzymatic activities: Polycomb repressive complexes 1 (PRC1), a ubiquitin ligase, and Polycomb repressive complexes 2 (PRC2), a histone methyltransferase. Traditionally, PRCs have been described to be associated with transcriptional repression of homeotic genes, as well as gene transcription activating effects. Particularly in cancer, PRCs have been found to misregulate gene expression, not only depending on the function of the whole PRCs, but also through their separate subunits. In this review, we focused especially on the recent findings in the transcriptional regulation of PRCs, the oncogenic and tumor-suppressive roles of PcG proteins, and the research progress of inhibitors targeting PRCs.
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10
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Su R, Wu X, Tao L, Wang C. The role of epigenetic modifications in Colorectal Cancer Metastasis. Clin Exp Metastasis 2022; 39:521-539. [PMID: 35429301 PMCID: PMC9338907 DOI: 10.1007/s10585-022-10163-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Accepted: 03/18/2022] [Indexed: 12/19/2022]
Abstract
Distant metastasis is the major contributor to the high mortality rate of colorectal cancer (CRC). To overcome the poor prognosis caused by distant metastasis, the mechanisms of CRC metastasis should be further explored. Epigenetic events are the main mediators of gene regulation and further affect tumor progression. Recent studies have found that some epigenetic enzymes are often dysregulated or mutated in multiple tumor types, which prompted us to study the roles of these enzymes in CRC metastasis. In this review, we summarized the alteration of enzymes related to various modifications, including histone modification, nonhistone modification, DNA methylation, and RNA methylation, and their epigenetic mechanisms during the progression of CRC metastasis. Existing data suggest that targeting epigenetic enzymes is a promising strategy for the treatment of CRC metastasis.
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Affiliation(s)
- Riya Su
- Department of pharmacology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Xinlin Wu
- Department of General Surgery, the Affiliated Hospital of Inner Mongolia Medical University, Huhhot, China
| | - Liang Tao
- Department of pharmacology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.
| | - Changshan Wang
- The State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, School of Life Sciences, Inner Mongolia University, Hohhot, China.
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11
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Parreno V, Martinez AM, Cavalli G. Mechanisms of Polycomb group protein function in cancer. Cell Res 2022; 32:231-253. [PMID: 35046519 PMCID: PMC8888700 DOI: 10.1038/s41422-021-00606-6] [Citation(s) in RCA: 50] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Accepted: 12/10/2021] [Indexed: 02/01/2023] Open
Abstract
AbstractCancer arises from a multitude of disorders resulting in loss of differentiation and a stem cell-like phenotype characterized by uncontrolled growth. Polycomb Group (PcG) proteins are members of multiprotein complexes that are highly conserved throughout evolution. Historically, they have been described as essential for maintaining epigenetic cellular memory by locking homeotic genes in a transcriptionally repressed state. What was initially thought to be a function restricted to a few target genes, subsequently turned out to be of much broader relevance, since the main role of PcG complexes is to ensure a dynamically choregraphed spatio-temporal regulation of their numerous target genes during development. Their ability to modify chromatin landscapes and refine the expression of master genes controlling major switches in cellular decisions under physiological conditions is often misregulated in tumors. Surprisingly, their functional implication in the initiation and progression of cancer may be either dependent on Polycomb complexes, or specific for a subunit that acts independently of other PcG members. In this review, we describe how misregulated Polycomb proteins play a pleiotropic role in cancer by altering a broad spectrum of biological processes such as the proliferation-differentiation balance, metabolism and the immune response, all of which are crucial in tumor progression. We also illustrate how interfering with PcG functions can provide a powerful strategy to counter tumor progression.
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12
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Yang Q, Wang Y, Li M, Wang Z, Zhang J, Dai W, Pei M, Hong L, Xiao Y, Hu H, Li J, Lin J, Wu X, Chen Y, Huang M, Li A, Liu S, Tang W, Xiang L, Wang J. HMGA1 promotes gastric cancer growth and metastasis by transactivating SUZ12 and CCDC43 expression. Aging (Albany NY) 2021; 13:16043-16061. [PMID: 34167089 PMCID: PMC8266323 DOI: 10.18632/aging.203130] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 05/13/2021] [Indexed: 12/12/2022]
Abstract
HMGA1 protein is an architectural transcription factor that has been implicated in the progression of multiple malignant tumors. However, the role of HMGA1 in the growth and metastasis of gastric cancer (GC) has not yet been elucidated. Here, we show that HMGA1 is overexpressed in GC cells and the high expression of HMGA1 was correlated with worse survival in GC patients using a bioinformatics assay. Functionally, HMGA1 affected the EdU incorporation, colony formation, migration and invasion of GC cells by exogenously increasing or decreasing the expression of HMGA1. Mechanistically, HMGA1 directly bound to the SUZ12 and CCDC43 promoter and transactivated its expression in GC cells. Inhibition of SUZ12 and CCDC43 attenuated the proliferation, migration and invasiveness of HMGA1-overexpressing GC cells in vitro. Moreover, both HMGA1 and SUZ12/CCDC43 were highly expressed in cancer cells but not in normal gastric tissues, and their expressions were positively correlated. Finally, a tail vein metastatic assay showed that HMGA1 promoted SUZ12/CCDC43-mediated GC cell metastasis in vivo. Our findings suggest that HMGA1 promotes GC growth and metastasis by transactivating SUZ12 and CCDC43 expression, highlighting HMGA1 as a potential prognostic biomarker in the treatment of GC.
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Affiliation(s)
- Qiong Yang
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China.,The Second Affiliated Hospital of University of South China, Hengyang 421001, China
| | - Yusi Wang
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Mengshu Li
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Zhi Wang
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Jieming Zhang
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Weiyu Dai
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Miaomiao Pei
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Linjie Hong
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Yizhi Xiao
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Hongsong Hu
- Department of Gastroenterology, Longgang District People's Hospital, Shenzhen 518172, China
| | - Jiaying Li
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Jianjiao Lin
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China.,Department of Gastroenterology, Longgang District People's Hospital, Shenzhen 518172, China
| | - Xiaosheng Wu
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Yaying Chen
- Department of Gastroenterology, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou 510150, China
| | - Miaojuan Huang
- Department of Gastroenterology, Longgang District People's Hospital, Shenzhen 518172, China
| | - Aimin Li
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Side Liu
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China.,Department of Gastroenterology, Longgang District People's Hospital, Shenzhen 518172, China
| | - Weimei Tang
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Li Xiang
- Department of Gastroenterology, Longgang District People's Hospital, Shenzhen 518172, China
| | - Jide Wang
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China.,Department of Gastroenterology, Longgang District People's Hospital, Shenzhen 518172, China
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13
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Hong S, Li S, Bi M, Yu H, Yan Z, Liu T, Wang H. lncRNA ILF3-AS1 promotes proliferation and metastasis of colorectal cancer cells by recruiting histone methylase EZH2. MOLECULAR THERAPY. NUCLEIC ACIDS 2021; 24:1012-1023. [PMID: 34141456 PMCID: PMC8167202 DOI: 10.1016/j.omtn.2021.04.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Accepted: 04/07/2021] [Indexed: 12/11/2022]
Abstract
The role of long non-coding RNA (lncRNA) has been displayed in colorectal cancer (CRC). Here, we aimed to discuss the role of lncRNA interleukin enhancer-binding factor 3-antisense RNA 1 (ILF3-AS1)/enhancer of zeste homolog 2 (EZH2)/cyclin-dependent kinase inhibitor 2 (CDKN2A)/histone 3 (H3) lysine 27 trimethylation (H3K27me3) in cell proliferation and metastasis of CRC. ILF3-AS1, EZH2, and CDKN2A levels in CRC tissues and cells were detected. The relationship between ILF3-AS1/EZH2 expression and the clinicopathological features of CRC was analyzed. High/low expression of ILF3-AS1/EZH2 plasmids were composed to explore the function of ILF3-AS1/EZH2 in invasion, migration, proliferation, colony formation, and apoptosis of CRC cells. The growth status of nude mice was observed to verify the in vitro results from in vivo experiment. ILF3-AS1 and EZH2 increased, whereas CDKN2A reduced in CRC tissues and cells. ILF3-AS1 and EZH2 expression was linked to Dukes stage, distant metastasis, vascular invasion, and lymph node metastasis of CRC patients. Depleted ILF3-AS1 or reduced EZH2 suppressed proliferation, migration, colony-formation, and invasion ability, as well as facilitated apoptosis of CRC cells and attenuated the tumor growth in CRC mice. ILF3-AS1 accelerates the proliferation and metastasis of CRC cells by recruiting histone methylase EZH2 to induce trimethylation of H3K27 and downregulate CDKN2A.
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Affiliation(s)
- Sen Hong
- Department of Colorectal and Anal Surgery, The First Hospital of Jilin University, Changchun 130021, Jilin, People’s Republic of China
| | - Shiquan Li
- Department of Colorectal and Anal Surgery, The First Hospital of Jilin University, Changchun 130021, Jilin, People’s Republic of China
| | - Miaomiao Bi
- Department of Ophthalmology, The China-Japan Union Hospital of Jilin University, Jilin University, Changchun 130022, Jilin, People’s Republic of China
| | - Haiyao Yu
- Chief Pharmacist, Changchun Food and Drug Inspection Center, Changchun, Jilin, People’s Republic of China
| | - Zhenkun Yan
- Endoscopy Center, The China-Japan Union Hospital of Jilin University, Changchun 130022, Jilin, People’s Republic of China
| | - Tao Liu
- Department of Colorectal and Anal Surgery, The First Hospital of Jilin University, Changchun 130021, Jilin, People’s Republic of China
| | - Helei Wang
- Department of Gastrointestinal Surgery, The First Hospital of Jilin University, Changchun 130021, Jilin, People’s Republic of China
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14
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Lorzadeh A, Romero-Wolf M, Goel A, Jadhav U. Epigenetic Regulation of Intestinal Stem Cells and Disease: A Balancing Act of DNA and Histone Methylation. Gastroenterology 2021; 160:2267-2282. [PMID: 33775639 PMCID: PMC8169626 DOI: 10.1053/j.gastro.2021.03.036] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 03/10/2021] [Accepted: 03/23/2021] [Indexed: 02/08/2023]
Abstract
Genetic mutations or regulatory failures underlie cellular malfunction in many diseases, including colorectal cancer and inflammatory bowel diseases. However, mutational defects alone fail to explain the complexity of such disorders. Epigenetic regulation-control of gene action through chemical and structural changes of chromatin-provides a platform to integrate multiple extracellular inputs and prepares the cellular genome for appropriate gene expression responses. Coregulation by polycomb repressive complex 2-mediated trimethylation of lysine 27 on histone 3 and DNA methylation has emerged as one of the most influential epigenetic controls in colorectal cancer and many other diseases, but molecular details remain inadequate. Here we review the molecular interplay of these epigenetic features in relation to gastrointestinal development, homeostasis, and disease biology. We discuss other epigenetic mechanisms pertinent to the balance of trimethylation of lysine 27 on histone 3 and DNA methylation and their actions in gastrointestinal cancers. We also review the current molecular understanding of chromatin control in the pathogenesis of inflammatory bowel diseases.
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Affiliation(s)
- Alireza Lorzadeh
- Department of Stem Cell Biology and Regenerative Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Maile Romero-Wolf
- Department of Stem Cell Biology and Regenerative Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Ajay Goel
- Department of Molecular Diagnostics and Experimental Therapeutics, Beckman Research Institute of City of Hope Comprehensive Cancer Center, Duarte, CA, USA
| | - Unmesh Jadhav
- Department of Stem Cell Biology and Regenerative Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California; Norris Comprehensive Cancer Center, Keck School of Medicine, University of Southern California, Los Angeles, California.
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15
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Zhang F, Yan Y, Cao X, Zhang J, Li Y, Guo C. Methylation of microRNA-338-5p by EED promotes METTL3-mediated translation of oncogene CDCP1 in gastric cancer. Aging (Albany NY) 2021; 13:12224-12238. [PMID: 33882457 PMCID: PMC8109089 DOI: 10.18632/aging.103822] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Accepted: 07/14/2020] [Indexed: 11/25/2022]
Abstract
Unmasking the complex regulatory pathways that mediate the malignant phenotypes of cancer cells can provide novel targets for therapies that could limit the recurrence and metastasis of gastric cancer (GC). Herein, we intended to clarify the role of embryonic ectoderm development protein (EED), microRNA-228-5p (miR-338-5p), methyltransferase like 3 (METTL3) and CUB domain containing protein 1 (CDCP1) in GC. Differentially expressed miRNAs and their target genes were extracted by in silico analysis. The studies revealed high expression of EED in GC tissues and cell lines and it high expression in GC patients was shown to be associated with poor prognosis. The chromatin immunoprecipitation assay identified that EED methylated miR-338-5p to inhibit its expression. EED knockdown could restrain the proliferative and invasive abilities of GC cells by inducing miR-338-5p. Furthermore, miR-338-5p targeted m6A methylase METTL3, while METTL3 amplified the translation of CDCP1 via m6A activity which led to accelerated proliferation and invasion of GC cells. Moreover, in vivo experiments validated that EED promoted the progression of GC through mediating the miR-338-5p/METTL3/CDCP1 axis. Collectively, EED downregulated miR-338-5p through histone methylation, which in turn impaired miR-338-5p-dependent METTL3 inhibition and enhanced CDCP1 translation, therefore contributing to the development of GC.
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Affiliation(s)
- Fangbin Zhang
- Department of Gastroenterology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, P. R. China
| | - Yan Yan
- Department of Oncology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, P. R. China
| | - Xinguang Cao
- Department of Gastroenterology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, P. R. China
| | - Jinping Zhang
- Department of Gastroenterology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, P. R. China
| | - Yingxia Li
- Department of Gastroenterology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, P. R. China
| | - Changqing Guo
- Department of Gastroenterology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, P. R. China
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16
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Song M, Zhong H. Efficient weighted univariate clustering maps outstanding dysregulated genomic zones in human cancers. Bioinformatics 2021; 36:5027-5036. [PMID: 32619008 PMCID: PMC7755420 DOI: 10.1093/bioinformatics/btaa613] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2019] [Revised: 05/24/2020] [Accepted: 06/26/2020] [Indexed: 12/14/2022] Open
Abstract
Motivation Chromosomal patterning of gene expression in cancer can arise from aneuploidy, genome disorganization or abnormal DNA methylation. To map such patterns, we introduce a weighted univariate clustering algorithm to guarantee linear runtime, optimality and reproducibility. Results We present the chromosome clustering method, establish its optimality and runtime and evaluate its performance. It uses dynamic programming enhanced with an algorithm to reduce search-space in-place to decrease runtime overhead. Using the method, we delineated outstanding genomic zones in 17 human cancer types. We identified strong continuity in dysregulation polarity—dominance by either up- or downregulated genes in a zone—along chromosomes in all cancer types. Significantly polarized dysregulation zones specific to cancer types are found, offering potential diagnostic biomarkers. Unreported previously, a total of 109 loci with conserved dysregulation polarity across cancer types give insights into pan-cancer mechanisms. Efficient chromosomal clustering opens a window to characterize molecular patterns in cancer genome and beyond. Availability and implementation Weighted univariate clustering algorithms are implemented within the R package ‘Ckmeans.1d.dp’ (4.0.0 or above), freely available at https://cran.r-project.org/package=Ckmeans.1d.dp. Supplementary information Supplementary data are available at Bioinformatics online.
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Affiliation(s)
- Mingzhou Song
- Department of Computer Science.,Molecular Biology Graduate Program, New Mexico State University, Las Cruces, NM 88003, USA
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17
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Chetverina DA, Lomaev DV, Georgiev PG, Erokhin MM. Genetic Impairments of PRC2 Activity in Oncology: Problems and Prospects. RUSS J GENET+ 2021. [DOI: 10.1134/s1022795421030042] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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18
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Wang G, Han J, Wang G, Wu X, Huang Y, Wu M, Chen Y. ERO1α mediates endoplasmic reticulum stress-induced apoptosis via microRNA-101/EZH2 axis in colon cancer RKO and HT-29 cells. Hum Cell 2021; 34:932-944. [PMID: 33559868 DOI: 10.1007/s13577-021-00494-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Accepted: 01/18/2021] [Indexed: 01/15/2023]
Abstract
Although colon cancer is a leading and typical gastrointestinal tumor, there is little published data on the underlying molecular mechanisms of endoplasmic reticulum (ER) stress. Here, we investigated the role of ERO1α and its impact on microRNA (miR)-101 expression and ER stress in colon cancer cells. Cell ER stress was established by treating RKO or HT-29 cells with 1 μM thapsigargin (THG). Cell biological behaviors were detected using CCK-8, bromodeoxyuridine assay, flow cytometry and western blot. We also investigated the expression of ERO1α and miR-101 after THG treatment using RT-qPCR. Moreover, effects of ERO1α and miR-101 on ER stress of colon cancer cells were detected. Additionally, miR-101 impact on EZH2 expression and relevance of this regulation was confirmed by RT-qPCR and luciferase reporter. The regulation of miR-101/EZH2 axis and Wnt/β-catenin pathway in ER stress were investigated. Our results demonstrated that THG induced ER stress in colon cancer cells. Silencing ERO1α further promoted ER stress-induced cell apoptosis. ERO1α knockdown up-regulated miR-101 expression and promoted colon cancer cell apoptosis via regulating miR-101. Surprisingly, miR-101 negatively regulated EZH2 expression via miRNA-mRNA targeting. Moreover, ER stress promoted colon cancer cell apoptosis via regulating miR-101/EZH2 axis. Wnt/β-catenin pathway was also involved in the regulation of ERO1α/miR-101/EZH2 in ER stress of colon cancer cells. These findings illustrated that silencing ERO1α regulated ER stress-induced apoptosis via miR-101/EZH2 axis in RKO and HT-29 cells.
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Affiliation(s)
- Guoqin Wang
- Cancer Biotherapy Center, The Third Affiliated Hospital of Kunming Medical University, Yunnan Cancer Hospital, Kunming, 650118, Yunnan, China
| | - Jiangqiong Han
- Integrated Traditional Chinese and Western Medicine Department, The Third Affiliated Hospital of Kunming Medical University, Yunnan Cancer Hospital, Kunming, 650118, Yunnan, China
| | - Gaowei Wang
- Cancer Biotherapy Center, The Third Affiliated Hospital of Kunming Medical University, Yunnan Cancer Hospital, Kunming, 650118, Yunnan, China
| | - Xuesong Wu
- Department Gastrointestinal Surgery, The Third Affiliated Hospital of Kunming Medical University, Kunming, 650101, Yunnan, China
| | - Youguang Huang
- Tumor Institute of Yunnan Province, The Third Affiliated Hospital of Kunming Medical University, Kunming, 650101, Yunnan, China
| | - Min Wu
- Tumor Institute of Yunnan Province, The Third Affiliated Hospital of Kunming Medical University, Kunming, 650101, Yunnan, China
| | - Yunlan Chen
- Cadre Medical Department, The Third Affiliated Hospital of Kunming Medical University, Yunnan Cancer Hospital, No. 517 Kunzhou Road, Xishan District, Kunming, 650118, Yunnan, China.
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19
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Liang Y, Nandakumar KS, Cheng K. Design and pharmaceutical applications of proteolysis-targeting chimeric molecules. Biochem Pharmacol 2020; 182:114211. [DOI: 10.1016/j.bcp.2020.114211] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 08/24/2020] [Accepted: 08/26/2020] [Indexed: 12/14/2022]
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20
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Jiang X, Wang L, Xie S, Chen Y, Song S, Lu Y, Lu D. Long noncoding RNA MEG3 blocks telomerase activity in human liver cancer stem cells epigenetically. Stem Cell Res Ther 2020; 11:518. [PMID: 33256840 PMCID: PMC7706068 DOI: 10.1186/s13287-020-02036-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Accepted: 11/18/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND MEG3 downregulated the expression in several tumors and inhibits human tumorigenesis. But so far, the mechanism of MEG3 in tumorigenesis is still unclear. METHODS In gene infection, cellular and molecular technologies and tumorigenesis test in vitro and in vivo were performed, respectively. RESULTS Our results indicate that MEG3 enhances the P53 expression by triggering the loading of P300 and RNA polymerase II onto its promoter regions dependent on HP1α. Moreover, MEG3 increases the methylation modification of histone H3 at the 27th lysine via P53. Furthermore, MEG3 inhibits the expression of TERT by increasing the H3K27me3 in TERT promoter regions, thereby inhibiting the activity of telomerase by reducing the binding of TERT to TERC. Furthermore, MEG3 also increases the expression of TERRA; therefore, the interaction between TERC and TERT was competitively attenuated by increasing the interaction between TERRA and TERT, which inhibits the activity of telomerase in hLCSCs. Strikingly, MEG3 reduces the length of telomere by blocking the formation of complex maintaining telomere length (POT1-Exo1-TRF2-SNM1B) and decreasing the binding of the complex to telomere by increasing the interplay between P53 and HULC. Ultimately, MEG3 inhibits the growth of hLCSCs by reducing the activity of telomerase and attenuating telomeric repeat binding factor 2(TRF2). CONCLUSIONS Our results demonstrates MEG3 inhibits the occurrence of human liver cancer by blocking telomere, and these findings provide an important insight into the prevention and treatment of human liver cancer.
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Affiliation(s)
- Xiaoxue Jiang
- Shanghai Putuo District People's Hospital, School of Life Science and Technology, Tongji University, Shanghai, 200092, China
| | - Liyan Wang
- Shanghai Putuo District People's Hospital, School of Life Science and Technology, Tongji University, Shanghai, 200092, China
| | - Sijie Xie
- Shanghai Putuo District People's Hospital, School of Life Science and Technology, Tongji University, Shanghai, 200092, China
| | - Yingjie Chen
- Shanghai Putuo District People's Hospital, School of Life Science and Technology, Tongji University, Shanghai, 200092, China
| | - Shuting Song
- Shanghai Putuo District People's Hospital, School of Life Science and Technology, Tongji University, Shanghai, 200092, China
| | - Yanan Lu
- Shanghai Putuo District People's Hospital, School of Life Science and Technology, Tongji University, Shanghai, 200092, China
| | - Dongdong Lu
- Shanghai Putuo District People's Hospital, School of Life Science and Technology, Tongji University, Shanghai, 200092, China.
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21
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O-GlcNAcylation Links Nutrition to the Epigenetic Downregulation of UNC5A during Colon Carcinogenesis. Cancers (Basel) 2020; 12:cancers12113168. [PMID: 33126652 PMCID: PMC7693889 DOI: 10.3390/cancers12113168] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Revised: 10/22/2020] [Accepted: 10/25/2020] [Indexed: 12/23/2022] Open
Abstract
Simple Summary Nutritional disorders represent major risk factors for colorectal cancer according to mechanisms of action that are still insufficiently known. The aim of our study was to investigate the putative involvement of nutrition in the epigenetic downregulation of the tumor suppressor genes of the UNC5 (Uncoordinated 5) family during colonic carcinogenesis and to understand its molecular relays. Herein, we provided evidence that the consumption of a High Carbohydrate Diet worsens colon carcinogenesis in mice and is correlated with the downregulation of several members of the UNC5 family whose UNC5A (Uncoordinated 5A). Mechanistically, we identified the nutritional sensor O-GlcNAcylation as one of the molecular relays that regulate the recruitment of the PRC2 complex onto the UNC5A promoter to repress its transcription. Abstract While it is now accepted that nutrition can influence the epigenetic modifications occurring in colorectal cancer (CRC), the underlying mechanisms are not fully understood. Among the tumor suppressor genes frequently epigenetically downregulated in CRC, the four related genes of the UNC5 family: UNC5A, UNC5B, UNC5C and UNC5D encode dependence receptors that regulate the apoptosis/survival balance. Herein, in a mouse model of CRC, we found that the expression of UNC5A, UNC5B and UNC5C was diminished in tumors but only in mice subjected to a High Carbohydrate Diet (HCD) thus linking nutrition to their repression in CRC. O-GlcNAcylation is a nutritional sensor which has enhanced levels in CRC and regulates many cellular processes amongst epigenetics. We then investigated the putative involvement of O-GlcNAcylation in the epigenetic downregulation of the UNC5 family members. By a combination of pharmacological inhibition and RNA interference approaches coupled to RT-qPCR (Reverse Transcription-quantitative Polymerase Chain Reaction) analyses, promoter luciferase assay and CUT&RUN (Cleavage Under Target & Release Using Nuclease) experiments, we demonstrated that the O-GlcNAcylated form of the histone methyl transferase EZH2 (Enhancer of Zeste Homolog 2) represses the transcription of UNC5A in human colon cancer cells. Collectively, our data support the hypothesis that O-GlcNAcylation could represent one link between nutrition and epigenetic downregulation of key tumor suppressor genes governing colon carcinogenesis including UNC5A.
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22
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Chetverina DA, Lomaev DV, Erokhin MM. Polycomb and Trithorax Group Proteins: The Long Road from Mutations in Drosophila to Use in Medicine. Acta Naturae 2020; 12:66-85. [PMID: 33456979 PMCID: PMC7800605 DOI: 10.32607/actanaturae.11090] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Accepted: 09/30/2020] [Indexed: 12/12/2022] Open
Abstract
Polycomb group (PcG) and Trithorax group (TrxG) proteins are evolutionarily conserved factors responsible for the repression and activation of the transcription of multiple genes in Drosophila and mammals. Disruption of the PcG/TrxG expression is associated with many pathological conditions, including cancer, which makes them suitable targets for diagnosis and therapy in medicine. In this review, we focus on the major PcG and TrxG complexes, the mechanisms of PcG/TrxG action, and their recruitment to chromatin. We discuss the alterations associated with the dysfunction of a number of factors of these groups in oncology and the current strategies used to develop drugs based on small-molecule inhibitors.
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Affiliation(s)
- D. A. Chetverina
- Institute of Gene Biology, Russian Academy of Sciences, Moscow, 119334 Russia
| | - D. V. Lomaev
- Institute of Gene Biology, Russian Academy of Sciences, Moscow, 119334 Russia
| | - M. M. Erokhin
- Institute of Gene Biology, Russian Academy of Sciences, Moscow, 119334 Russia
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23
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Wang Y, Sun H, Zhang J, Xia Z, Chen W. Streptozotocin-induced diabetic cardiomyopathy in rats: ameliorative effect of PIPERINE via Bcl2, Bax/Bcl2, and caspase-3 pathways. Biosci Biotechnol Biochem 2020; 84:2533-2544. [PMID: 32892714 DOI: 10.1080/09168451.2020.1815170] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The objective of present investigation was to appraise the effects of piperine on STZ-induced diabetic cardiomyopathy in rats. Diabetes was induced in Sprague-Dawley rats with intraperitoneal STZ injection, and the rats were assigned to seven groups. Electrocardiograph, hemodynamic, various biochemical, molecular, and histological parameters were examined. Treatment with piperine significantly (p < 0.05) restored altered myocardial functions, inhibited cardiac marker, and restored electrocardiogram and hemodynamic alterations. The elevated level of cardiac oxido-nitrosative stress and decreased cardiac Na-K-ATPase concentration, after STZ administration, were significantly (p < 0.05) attenuated by piperine treatment. Piperine also considerably (p < 0.05) increased myocardial mitochondrial enzyme activity. STZ-induced alteration in heart ANP, BNP, cTn-I, Bcl2, Bax/Bcl2, and caspase3 mRNA expression was significantly (p < 0.05) restored by piperine treatment. Piperine administration reduced histopathological aberrations induced by STZ. In conclusion, the present investigation suggests that piperine ameliorates STZ-induced diabetic cardiomyopathy via modulation of caspase-3, Bcl2, Bax/Bcl2 pathways. Abbreviations: ACE: Angiotensin-Converting Enzyme; ANOVA: Analysis of Variance; ANP: Atrial Natriuretic Peptide; APAF: Apoptotic Protease-Activating Factor; ARB: Angiotensin Receptor Blockers; ATP: Adenosine Triphosphate; Bax: Bcl-2-associated X protein; Bcl2: B-cell lymphoma 2; BPM: Beats Per Minute; BNP: brain natriuretic peptide; CAD: Caspase-3-Activated DNase; cDNA: Complementary DNA; CK-MB: Creatine Kinase-MB; CPCSEA: Committee for the Purpose of Control And Supervision of Experiments on Animals; cTn-I: cardiac troponin I; DBP: Diastolic Blood Pressure; DCM: Diabetic Cardiomyopathy; DNA: Deoxyribonucleic Acid; DPX: DisterenePhthalate Xylene; ECG: Electrocardiogram; ETC: Electron Transport Chain; GOD-POD: Glucose Oxidase Peroxidase; GSH: Glutathione; IAEC: Institutional Animal Ethics Committee; IL-6: Interleukin-6; IL-1b: Interleukin-1b; LDH: Lactate Dehydrogenase; LV: Left Ventricle; LVEDP: left ventricular end-diastolic Pressure; MABP: Mean Arterial Blood Pressure; MDA: Malondialdehyde; mRNA: Messenger Ribonucleic Acid; MTT: 3- (4,5-Dimethylthiazol-2-yl)-2,5-DiphenyltetrazoliumBromide; NADH: Nicotinamide Adenine Dinucleotide Phosphate; NADPH: Nicotinamide Adenine Dinucleotide Phosphate Hydrogen; NO: nitric oxide; NP: Natriuretic Peptides; OXPHOS: Oxidative Phosphorylation; p.o.: per os; PCR: Polymerase Chain Reaction; RT-PCR: Reverse Transcriptionpolymerase Chain Reaction; PPAR: Peroxisome Proliferator-Activated Receptor Gamma; RAS: Renin-Angiotensin System; RNA: Ribonucleic Acid; ROS: Reactive Oxygen Species; SBP: Systolic Blood Pressure; SDH: Succinate Dehydrogenase; SEM: Standard Error Means; SOD: superoxide dismutase: STZ: Streptozotocin; TNF: Tumor Necrosis Factor Alpha; TnI: Troponin I.
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Affiliation(s)
- Yan Wang
- Department of Endocrinology, The Affiliated Hospital of North Sichuan Medical College , Nanchong City, Sichuan Province, China
| | - Hui Sun
- Department of Infectious Diseases, The Affiliated Hospital of North Sichuan Medical College , Nanchong City, Sichuan Province, China
| | - Jianwu Zhang
- Department of Pharmacology, School of Pharmacy, North Sichuan Medical College , Nanchong City, Sichuan Province, China
| | - Zhiyang Xia
- Department of Pathophysiology, School of Basic Medicine, North Sichuan Medical College , Nanchong City, Sichuan Province, China
| | - Wei Chen
- Department of Pathophysiology, School of Basic Medicine, North Sichuan Medical College , Nanchong City, Sichuan Province, China
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24
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Wang Q, Jiang S, Liu J, Ma G, Zheng J, Zhang Y. DEP Domain Containing 1 Promotes Proliferation, Invasion, and Epithelial-Mesenchymal Transition in Colorectal Cancer by Enhancing Expression of Suppressor of Zest 12. Cancer Biother Radiopharm 2020; 36:36-44. [PMID: 32343606 DOI: 10.1089/cbr.2019.3460] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Objective: DEP domain containing 1 (DEPDC1), aberrantly upregulated in various tumors, has been shown to be involved in the occurrence and development of tumors. This study aims to investigate pathophysiological roles of DEPDC1 in colorectal cancer (CRC). Materials and Methods: Expression level of DEPDC1 and suppressor of zest 12 (SUZ12) in CRC tissues and cell lines were analyzed by quantitative real-time polymerase chain reaction and immunohistochemistry. Staining with 5-bromo-2-deoxyuridine staining and colony formation assays were conducted to evaluate cell proliferation. Transwell or wound healing assay to evaluate invasion or migration, respectively. The effect on epithelial-mesenchymal transition (EMT) of CRC was determined by Western blot. Results: DEPDC1 and SUZ12 were increased in CRC tissues and cell lines. Silence of DEPDC1 suppressed cell proliferation, migration, and invasion of CRC. Moreover, DEPDC1 knockdown suppressed EMT of CRC. Mechanistically, the authors demonstrated silencing DEPDC1 decreased protein expression of SUZ12 and led to a remarkable reduction of trimethylation on the lysine 27 residue of histone H3 (H3K27Me3). Inhibitory ability of DEPDC1 knockdown on CRC progression was reversed by overexpression of SUZ12. Conclusions: DEPDC1 promoted CRC progression through regulation of SUZ12-mediated H3K27Me3, illuminating a novel DEPDC1-SUZ12 molecular axis as regulator in CRC progression and suggesting potential implications in treatment of CRC.
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Affiliation(s)
- Qiang Wang
- Department of Surgical Oncology, Mindong Hospital Affiliated to Fujian Medical University, Ningde, China
| | - Shijian Jiang
- Department of Surgical Oncology, Mindong Hospital Affiliated to Fujian Medical University, Ningde, China
| | - Jianchao Liu
- Department of General Surgery, Liaocheng People's Hospital, Liaocheng, China
| | - Genshun Ma
- Department of General Surgery, Liaocheng People's Hospital, Liaocheng, China
| | - Jianrui Zheng
- Department of Pathology, Mindong Hospital Affiliated to Fujian Medical University, Ningde, China
| | - Yajun Zhang
- Department of General Surgery, Liaocheng People's Hospital, Liaocheng, China
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25
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Sun X, Gao H, Yang Y, He M, Wu Y, Song Y, Tong Y, Rao Y. PROTACs: great opportunities for academia and industry. Signal Transduct Target Ther 2019; 4:64. [PMID: 31885879 PMCID: PMC6927964 DOI: 10.1038/s41392-019-0101-6] [Citation(s) in RCA: 346] [Impact Index Per Article: 69.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2019] [Revised: 11/17/2019] [Accepted: 11/21/2019] [Indexed: 02/07/2023] Open
Abstract
Although many kinds of therapies are applied in the clinic, drug-resistance is a major and unavoidable problem. Another disturbing statistic is the limited number of drug targets, which are presently only 20-25% of all protein targets that are currently being studied. Moreover, the focus of current explorations of targets are their enzymatic functions, which ignores the functions from their scaffold moiety. As a promising and appealing technology, PROteolysis TArgeting Chimeras (PROTACs) have attracted great attention both from academia and industry for finding available approaches to solve the above problems. PROTACs regulate protein function by degrading target proteins instead of inhibiting them, providing more sensitivity to drug-resistant targets and a greater chance to affect the nonenzymatic functions. PROTACs have been proven to show better selectivity compared to classic inhibitors. PROTACs can be described as a chemical knockdown approach with rapidity and reversibility, which presents new and different biology compared to other gene editing tools by avoiding misinterpretations that arise from potential genetic compensation and/or spontaneous mutations. PRTOACs have been widely explored throughout the world and have outperformed not only in cancer diseases, but also in immune disorders, viral infections and neurodegenerative diseases. Although PROTACs present a very promising and powerful approach for crossing the hurdles of present drug discovery and tool development in biology, more efforts are needed to gain to get deeper insight into the efficacy and safety of PROTACs in the clinic. More target binders and more E3 ligases applicable for developing PROTACs are waiting for exploration.
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Affiliation(s)
- Xiuyun Sun
- Ministry of Education (MOE) Key Laboratory of Protein Sciences, School of Pharmaceutical Sciences, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University, Beijing, 100084 P. R. China
- Tsinghua-Peking Center for Life Sciences, Beijing, 100084 P. R. China
| | - Hongying Gao
- Ministry of Education (MOE) Key Laboratory of Protein Sciences, School of Pharmaceutical Sciences, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University, Beijing, 100084 P. R. China
- Tsinghua-Peking Center for Life Sciences, Beijing, 100084 P. R. China
| | - Yiqing Yang
- Ministry of Education (MOE) Key Laboratory of Protein Sciences, School of Pharmaceutical Sciences, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University, Beijing, 100084 P. R. China
- Tsinghua-Peking Center for Life Sciences, Beijing, 100084 P. R. China
| | - Ming He
- Ministry of Education (MOE) Key Laboratory of Protein Sciences, School of Pharmaceutical Sciences, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University, Beijing, 100084 P. R. China
| | - Yue Wu
- Ministry of Education (MOE) Key Laboratory of Protein Sciences, School of Pharmaceutical Sciences, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University, Beijing, 100084 P. R. China
| | - Yugang Song
- Ministry of Education (MOE) Key Laboratory of Protein Sciences, School of Pharmaceutical Sciences, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University, Beijing, 100084 P. R. China
| | - Yan Tong
- Ministry of Education (MOE) Key Laboratory of Protein Sciences, School of Pharmaceutical Sciences, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University, Beijing, 100084 P. R. China
| | - Yu Rao
- Ministry of Education (MOE) Key Laboratory of Protein Sciences, School of Pharmaceutical Sciences, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University, Beijing, 100084 P. R. China
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, 450001 China
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26
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Qing Z, Hu J, Xu J, Zou Z, Lei Y, Qing T, Yang R. An intramolecular catalytic hairpin assembly on a DNA tetrahedron for mRNA imaging in living cells: improving reaction kinetics and signal stability. Chem Sci 2019; 11:1985-1990. [PMID: 34123293 PMCID: PMC8148388 DOI: 10.1039/c9sc04916a] [Citation(s) in RCA: 121] [Impact Index Per Article: 24.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Enzyme-free amplification techniques based on dynamic DNA self-assembly (DDSA) have recently been developed for the in situ detection of mRNA in living cells. However, signal generation in traditional DDSA amplifiers is mainly dependent on the random diffusion of dissociative probes in a bulk solution, which is generally accompanied by poor kinetics and interference from complex biological systems. In this work, a new amplifier based on the design of an intramolecular catalytic hairpin assembly (intra-CHA) is proposed for the FRET imaging of mRNA in living cells. Compared with that in the free catalytic hairpin assembly (free-CHA), probes H1 and H2 in intra-CHA were simultaneously fixed on a DNA tetrahedron. The distance between them was closer, the local concentration of H1 and H2 in intra-CHA was theoretically approximately 808-times higher than that in free-CHA, and the initial reaction rate was enhanced 15.6 fold. Due to the spatial confinement effect, the reaction kinetics for target-catalyzed signal generation were significantly improved. By virtue of the three-dimensional nanostructure, H1 and H2 in the intra-CHA amplifier entered cells without any transfection or nanocarrier, and the probes and their products were free from biological interference, providing much higher signal stability for the reliable imaging of mRNA in living cells. An intramolecular catalytic hairpin assembly is implemented on a DNA tetrahedron for mRNA imaging in living cells. The spatial confinement effect enables the acceleration of target-triggered signal generation, with excellent cell permeability and FRET signal stability.![]()
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Affiliation(s)
- Zhihe Qing
- Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, Hunan Provincial Engineering Research Center for Food Processing of Aquatic Biotic Resources, School of Chemistry and Food Engineering, Changsha University of Science and Technology Changsha 410114 P. R. China
| | - Jinlei Hu
- Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, Hunan Provincial Engineering Research Center for Food Processing of Aquatic Biotic Resources, School of Chemistry and Food Engineering, Changsha University of Science and Technology Changsha 410114 P. R. China
| | - Jingyuan Xu
- Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, Hunan Provincial Engineering Research Center for Food Processing of Aquatic Biotic Resources, School of Chemistry and Food Engineering, Changsha University of Science and Technology Changsha 410114 P. R. China
| | - Zhen Zou
- Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, Hunan Provincial Engineering Research Center for Food Processing of Aquatic Biotic Resources, School of Chemistry and Food Engineering, Changsha University of Science and Technology Changsha 410114 P. R. China
| | - Yanli Lei
- Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, Hunan Provincial Engineering Research Center for Food Processing of Aquatic Biotic Resources, School of Chemistry and Food Engineering, Changsha University of Science and Technology Changsha 410114 P. R. China
| | - Taiping Qing
- College of Environment and Resources, Xiangtan University Xiangtan 411105 P. R. China
| | - Ronghua Yang
- Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, Hunan Provincial Engineering Research Center for Food Processing of Aquatic Biotic Resources, School of Chemistry and Food Engineering, Changsha University of Science and Technology Changsha 410114 P. R. China
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27
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Potjewyd F, Turner AMW, Beri J, Rectenwald JM, Norris-Drouin JL, Cholensky SH, Margolis DM, Pearce KH, Herring LE, James LI. Degradation of Polycomb Repressive Complex 2 with an EED-Targeted Bivalent Chemical Degrader. Cell Chem Biol 2019; 27:47-56.e15. [PMID: 31831267 DOI: 10.1016/j.chembiol.2019.11.006] [Citation(s) in RCA: 119] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Revised: 10/04/2019] [Accepted: 11/12/2019] [Indexed: 12/18/2022]
Abstract
Protein degradation via the use of bivalent chemical degraders provides an alternative strategy to block protein function and assess the biological roles of putative drug targets. This approach capitalizes on the advantages of small-molecule inhibitors while moving beyond the restrictions of traditional pharmacology. Here, we report a chemical degrader (UNC6852) that targets polycomb repressive complex 2 (PRC2). UNC6852 contains an EED226-derived ligand and a ligand for VHL which bind to the WD40 aromatic cage of EED and CRL2VHL, respectively, to induce proteasomal degradation of PRC2 components, EED, EZH2, and SUZ12. Degradation of PRC2 with UNC6852 blocks the histone methyltransferase activity of EZH2, decreasing H3K27me3 levels in HeLa cells and diffuse large B cell lymphoma (DLBCL) cells containing EZH2 gain-of-function mutations. UNC6852 degrades both wild-type and mutant EZH2, and additionally displays anti-proliferative effects in this cancer model system.
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Affiliation(s)
- Frances Potjewyd
- Center for Integrative Chemical Biology and Drug Discovery, Division of Chemical Biology and Medicinal Chemistry, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Anne-Marie W Turner
- UNC HIV Cure Center, Institute of Global Health and Infectious Diseases, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Joshua Beri
- UNC Proteomics Core Facility, Department of Pharmacology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Justin M Rectenwald
- Center for Integrative Chemical Biology and Drug Discovery, Division of Chemical Biology and Medicinal Chemistry, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA; Department of Biochemistry and Biophysics, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Jacqueline L Norris-Drouin
- Center for Integrative Chemical Biology and Drug Discovery, Division of Chemical Biology and Medicinal Chemistry, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Stephanie H Cholensky
- Center for Integrative Chemical Biology and Drug Discovery, Division of Chemical Biology and Medicinal Chemistry, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - David M Margolis
- UNC HIV Cure Center, Institute of Global Health and Infectious Diseases, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA; Department of Medicine, School Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA; Department of Microbiology and Immunology, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Kenneth H Pearce
- Center for Integrative Chemical Biology and Drug Discovery, Division of Chemical Biology and Medicinal Chemistry, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Laura E Herring
- UNC Proteomics Core Facility, Department of Pharmacology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Lindsey I James
- Center for Integrative Chemical Biology and Drug Discovery, Division of Chemical Biology and Medicinal Chemistry, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA; Lineberger Comprehensive Cancer Center, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
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28
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Abudurexiti M, Xie H, Jia Z, Zhu Y, Zhu Y, Shi G, Zhang H, Dai B, Wan F, Shen Y, Ye D. Development and External Validation of a Novel 12-Gene Signature for Prediction of Overall Survival in Muscle-Invasive Bladder Cancer. Front Oncol 2019; 9:856. [PMID: 31552180 PMCID: PMC6743371 DOI: 10.3389/fonc.2019.00856] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Accepted: 08/19/2019] [Indexed: 11/13/2022] Open
Abstract
Purpose: We aimed to develop and validate a novel gene signature from published data and improve the prediction of survival in muscle-invasive bladder cancer (MIBC). Methods: We searched the published gene signatures associated with the overall survival (OS) of MIBC and compiled all 274 genes to develop a novel gene signature. RNAseq data of TCGA (the Cancer Genome Atlas) bladder cohort were downloaded. All genes were included in a univariate Cox hazard ratio model. We then used a reduced multivariate Cox regression model, which included only genes achieving P < 0.05 in the univariate model. A total of 172 patients at Fudan University Shanghai Cancer Center (FUSCC) and 61 patients from GEO datasets were used as an external validation set. Results: A total of 327 patients in the TCGA cohort were enrolled. We identified 274 genes from eight published papers on the OS of MIBC. Using the TCGA database, we identified 12 genes that correlated with OS (P < 0.05 in both univariate and multivariate analyses). By integrating these genes with the RT-qPCR data in our validation dataset and GEO datasets, we confirmed that the power for predicting OS of the 12-gene panel (AUC of 0.741 and 0.727, respectively) was higher than just clinical data (including gender, age, T stage, grade, and N stage) alone in the TCGA and FUSCC cohort (AUC of 0.667 and 0.631, respectively). Additionally, upon combining the clinical data and 12-gene panel together, the AUC increased to 0.768, 0.757, and 0.88 in the TCGA, FUSCC and GSE13507 cohorts, respectively. Conclusions: Applying published gene signatures and TCGA data, we successfully built and externally validated a novel 12-gene signature for the survival of MIBC.
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Affiliation(s)
- MierXiati Abudurexiti
- Department of Urology, Fudan University Shanghai Cancer Center, Shanghai, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Huyang Xie
- Department of Urology, Affiliated Hospital of Nantong University, Nantong, China
| | - Zhongwei Jia
- Department of Medical Oncology, Clinical Medical College of Yangzhou University, Northern Jiangsu People's Hospital, Yangzhou, China
| | - Yiping Zhu
- Department of Urology, Fudan University Shanghai Cancer Center, Shanghai, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Yao Zhu
- Department of Urology, Fudan University Shanghai Cancer Center, Shanghai, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Guohai Shi
- Department of Urology, Fudan University Shanghai Cancer Center, Shanghai, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Hailiang Zhang
- Department of Urology, Fudan University Shanghai Cancer Center, Shanghai, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Bo Dai
- Department of Urology, Fudan University Shanghai Cancer Center, Shanghai, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Fangning Wan
- Department of Urology, Fudan University Shanghai Cancer Center, Shanghai, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Yijun Shen
- Department of Urology, Fudan University Shanghai Cancer Center, Shanghai, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Dingwei Ye
- Department of Urology, Fudan University Shanghai Cancer Center, Shanghai, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
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29
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Ying X, Pan R, Zhong J, Wu B, Jiang Y, Ying J, Zhou C, Dai J, Zhao S, Shen Y, Zhang W, Duan S. Significant association of EED promoter hypomethylation with colorectal cancer. Oncol Lett 2019; 18:1564-1570. [PMID: 31423224 DOI: 10.3892/ol.2019.10432] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2017] [Accepted: 03/12/2019] [Indexed: 01/02/2023] Open
Abstract
Colorectal cancer (CRC) is one of the most common and serious types of malignancy worldwide. The embryonic ectoderm development (EED) gene is important to maintain transcriptional repressive states of genes over successive cell generations. The present study aimed to investigate the association between EED methylation and CRC. A total of 111 CRC tissue samples, 111 paired para-tumor tissues and 20 colorectal normal tissues were obtained for EED methylation assay, which was performed using a quantitative methylation-specific polymerase chain reaction. The percentage of methylated reference was calculated to represent the DNA methylation level. A dual-luciferase reporter gene assay was used to detect the gene promoter activity of a EED fragment. The current results revealed a significant difference in the EED methylation levels among tumor, para-tumor and normal colorectal tissues (tumor vs. para-tumor vs. normal, 5.03±4.61 vs. 8.65±11.50 vs. 40.12±45.31; F=45.014; P<0.0001). The dual-luciferase reporter gene assay demonstrated that the transcriptional activity of recombinant pGL3-EED plasmid was significantly higher compared with that of the pGL3-Basic control vector (fold-change, 3.15; P=0.014), which suggests the EED fragment can promote gene expression. In conclusion, the present study demonstrated that EED hypomethylation may be an important factor associated with CRC.
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Affiliation(s)
- Xiuru Ying
- Medical Genetics Center, School of Medicine, Ningbo University, Ningbo, Zhejiang 315211, P.R. China
| | - Ranran Pan
- Medical Genetics Center, School of Medicine, Ningbo University, Ningbo, Zhejiang 315211, P.R. China
| | - Jie Zhong
- Medical Genetics Center, School of Medicine, Ningbo University, Ningbo, Zhejiang 315211, P.R. China
| | - Boyi Wu
- Medical Genetics Center, School of Medicine, Ningbo University, Ningbo, Zhejiang 315211, P.R. China
| | - Yuting Jiang
- Medical Genetics Center, School of Medicine, Ningbo University, Ningbo, Zhejiang 315211, P.R. China
| | - Jieer Ying
- Department of Medical Oncology, Zhejiang Cancer Hospital, Hangzhou, Zhejiang 310022, P.R. China
| | - Cong Zhou
- Medical Genetics Center, School of Medicine, Ningbo University, Ningbo, Zhejiang 315211, P.R. China
| | - Jie Dai
- Medical Genetics Center, School of Medicine, Ningbo University, Ningbo, Zhejiang 315211, P.R. China
| | - Shuangying Zhao
- Medical Genetics Center, School of Medicine, Ningbo University, Ningbo, Zhejiang 315211, P.R. China
| | - Yinan Shen
- Medical Genetics Center, School of Medicine, Ningbo University, Ningbo, Zhejiang 315211, P.R. China
| | - Wei Zhang
- Department of Preventive Medicine and The Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Feinberg School of Medicine, Chicago, IL 60611, USA
| | - Shiwei Duan
- Medical Genetics Center, School of Medicine, Ningbo University, Ningbo, Zhejiang 315211, P.R. China
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30
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Böhm J, Muenzner JK, Caliskan A, Ndreshkjana B, Erlenbach-Wünsch K, Merkel S, Croner R, Rau TT, Geppert CI, Hartmann A, Roehe AV, Schneider-Stock R. Loss of enhancer of zeste homologue 2 (EZH2) at tumor invasion front is correlated with higher aggressiveness in colorectal cancer cells. J Cancer Res Clin Oncol 2019; 145:2227-2240. [PMID: 31317325 PMCID: PMC6708512 DOI: 10.1007/s00432-019-02977-1] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Accepted: 07/06/2019] [Indexed: 12/11/2022]
Abstract
PURPOSE Enhancer of zeste homolog 2 (EZH2) is associated with epigenetic gene silencing and aggressiveness in many tumor types. However, the prognostic impact of high EZH2 expression is controversially discussed for colorectal cancer. For this reason, we immunohistochemically analyzed EZH2 expression in 105 specimens from colon cancer patients separately for tumor center and invasion front. METHODS All sections from tissue microarrays were evaluated manually and digitally using Definiens Tissue Studio software (TSS). To mirror-image the EZH2 status at the tumor invasion front, we treated HCT116 colon cancer cells with the EZH2 inhibitor 3-Deazaneplanocin A (DZNep) and studied the growth of in ovo xenografts in the chorioallantoic membrane (CAM) assay. RESULTS We showed a significant decrease in EZH2 expression and the repressive H3K27me3 code at the tumor invasion front as supported by the TSS-constructed heatmaps. Loss of EZH2 at tumor invasion front, but not in tumor center was correlated with unfavorable prognosis and more advanced tumor stages. The observed cell cycle arrest in vitro and in vivo was associated with higher tumor aggressiveness. Xenografts formed by DZNep-treated HCT116 cells showed loosely packed tumor masses, infiltrative growth into the CAM, and high vessel density. CONCLUSION The differences in EZH2 expression between tumor center and invasion front as well as different scoring and cutoff values can most likely explain controversial literature data concerning the prognostic value of EZH2. Epigenetic therapies using EZH2 inhibitors have to be carefully evaluated for each specific tumor type, since alterations in cell differentiation might lead to unfavorable results.
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Affiliation(s)
- Julian Böhm
- Experimental Tumorpathology, Institute of Pathology, Friedrich-Alexander-University of Erlangen-Nürnberg, Universitätsstr. 22, 91054, Erlangen, Germany.,Institute of Pathology, Friedrich-Alexander-University of Erlangen-Nürnberg, Krankenhausstr. 8-10, 91054, Erlangen, Germany
| | - Julienne Kathrin Muenzner
- Experimental Tumorpathology, Institute of Pathology, Friedrich-Alexander-University of Erlangen-Nürnberg, Universitätsstr. 22, 91054, Erlangen, Germany.,Institute of Pathology, Friedrich-Alexander-University of Erlangen-Nürnberg, Krankenhausstr. 8-10, 91054, Erlangen, Germany
| | - Aylin Caliskan
- Experimental Tumorpathology, Institute of Pathology, Friedrich-Alexander-University of Erlangen-Nürnberg, Universitätsstr. 22, 91054, Erlangen, Germany.,Institute of Pathology, Friedrich-Alexander-University of Erlangen-Nürnberg, Krankenhausstr. 8-10, 91054, Erlangen, Germany
| | - Benardina Ndreshkjana
- Experimental Tumorpathology, Institute of Pathology, Friedrich-Alexander-University of Erlangen-Nürnberg, Universitätsstr. 22, 91054, Erlangen, Germany.,Institute of Pathology, Friedrich-Alexander-University of Erlangen-Nürnberg, Krankenhausstr. 8-10, 91054, Erlangen, Germany
| | - Katharina Erlenbach-Wünsch
- Institute of Pathology, Friedrich-Alexander-University of Erlangen-Nürnberg, Krankenhausstr. 8-10, 91054, Erlangen, Germany
| | - Susanne Merkel
- Department of Surgery, Friedrich-Alexander-University of Erlangen-Nürnberg, Krankenhausstr. 12, 91054, Erlangen, Germany
| | - Roland Croner
- Department of Surgery, Friedrich-Alexander-University of Erlangen-Nürnberg, Krankenhausstr. 12, 91054, Erlangen, Germany.,Department of Surgery, Otto-von-Guericke University, Leipziger Str. 44, 39120, Magdeburg, Germany
| | - Tilman T Rau
- Institute of Pathology, Friedrich-Alexander-University of Erlangen-Nürnberg, Krankenhausstr. 8-10, 91054, Erlangen, Germany.,Institute of Pathology, University Bern, Murtenstr. 31, 3008, Bern, Switzerland
| | - Carol Immanuel Geppert
- Institute of Pathology, Friedrich-Alexander-University of Erlangen-Nürnberg, Krankenhausstr. 8-10, 91054, Erlangen, Germany
| | - Arndt Hartmann
- Institute of Pathology, Friedrich-Alexander-University of Erlangen-Nürnberg, Krankenhausstr. 8-10, 91054, Erlangen, Germany
| | - Adriana Vial Roehe
- Department of Pathology, Federal University of Health Sciences of Porto Alegre (UFCSPA), R. Sarmento Leite, 245-Centro Histórico, Porto Alegre, RS, 90050-170, Brazil
| | - Regine Schneider-Stock
- Experimental Tumorpathology, Institute of Pathology, Friedrich-Alexander-University of Erlangen-Nürnberg, Universitätsstr. 22, 91054, Erlangen, Germany. .,Institute of Pathology, Friedrich-Alexander-University of Erlangen-Nürnberg, Krankenhausstr. 8-10, 91054, Erlangen, Germany.
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Zhang J, Xu S, Xu J, Li Y, Zhang J, Zhang J, Lu X. miR‑767‑5p inhibits glioma proliferation and metastasis by targeting SUZ12. Oncol Rep 2019; 42:55-66. [PMID: 31115583 PMCID: PMC6549087 DOI: 10.3892/or.2019.7156] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Accepted: 04/09/2019] [Indexed: 12/14/2022] Open
Abstract
A growing body of evidence implicates aberrant expression of microRNAs (miRNAs) and dysregulation of mRNA translation in the development and growth of cancer cells. However, little is known about the mechanisms of action of miRNAs in glioma, the most common form of adult-onset malignant brain tumor. In the present study, the expression and function of miR-767-5p were examined in human glioblastoma multiforme (GBM) tissue specimens and cell lines. miR-767-5p expression levels were analyzed by quantitative reverse-transcription PCR; cell proliferation was assessed by CCK-8, colony formation and 5-ethynyl-2′-deoxyuridine (EDU) assays; the cell cycle phase and apoptosis were detected by flow cytometry; and cell invasiveness was analyzed using wound healing and Transwell invasion assays. It was revealed found that miR-767-5p was significantly upregulated in GBM tissues (n=18) compared with normal brain tissues (n=8) and in 6 GBM cell lines compared with normal human astrocytes. Ectopic expression of miR-767-5p suppressed proliferation, colony formation, and migration, and promoted cell cycle arrest and apoptosis in GBM cell lines in vitro, and inhibited GBM tumor growth in a mouse xenograft model. Bioinformatics analysis identified the PRC2 component suppressor of zeste-12 (SUZ12) as a putative target of miR-767-5p. Co-transfection of miR-767-5p inhibited the activity of a luciferase reporter construct driven by the wild-type 3′ untranslated region of SUZ12 mRNA, but this was abolished by mutation of the putative miR-767-5p-binding sites. Consistent with the possibility that miR-767-5p acts by regulating SUZ12 expression, it was revealed that the inhibitory effects of miR-767-5p on GBM cell phenotypes were reversed by overexpression of SUZ12. Our results indicated that forced upregulation of miR-767-5p may represent a novel therapeutic strategy for glioma patients by targeting SUZ12.
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Affiliation(s)
- Jiale Zhang
- Department of Neurosurgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Shuo Xu
- Department of Intensive Care Unit, Zhenjiang First People's Hospital, Zhenjiang, Jiangsu 212002, P.R. China
| | - Jia Xu
- Department of Neurosurgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Yangyang Li
- Department of Neurosurgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Jie Zhang
- Department of Neurosurgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Jian Zhang
- Department of Neurosurgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Xiaoming Lu
- Department of Neurosurgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
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Overexpression of polycomb repressive complex 2 key components EZH2/SUZ12/EED as an unfavorable prognostic marker in cholangiocarcinoma. Pathol Res Pract 2019; 215:152451. [PMID: 31126817 DOI: 10.1016/j.prp.2019.152451] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 04/29/2019] [Accepted: 05/12/2019] [Indexed: 12/19/2022]
Abstract
BACKGROUND Cholangiocarcinoma (CCA) is a fatal liver cancer arising from bile duct epithelium. Polycomb repressive complex 2 (PRC2) is a histone methyltransferase enzyme that catalyzes trimethylation of histone H3 on lysine 27, resulting transcriptional gene silencing. The key components of PRC2 are EZH2, SUZ12 and EED, which EZH2 is a catalytic subunit. The defect of individual PRC2 components has been shown to enhance carcinogenesis and cancer progression. The aim of this study was to determine the expression of individual PRC2 components and evaluate its association with clinicopathological data in CCA patients. METHODS The expression of PRC2 components including EZH2, SUZ12 and EED was determined by immunohistochemistry in 40 CCA tissue samples. RESULTS The expression of EZH2 and SUZ12 in CCA tissue was significantly higher than that in adjacent non-cancerous tissue (P < 0.001). The high cytoplasmic EZH2 expression was significantly associated with short overall survival in CCA (P = 0.030). Interestingly, a combined high nuclear and cytoplasmic expression of EZH2 was found to be a worse prognostic marker for overall survival (P = 0.015). Moreover, combined high expression of EZH2 and SUZ12/EED was also associated with short overall survival (P < 0.05). CONCLUSIONS Our findings suggest that overexpression of the PRC2 key components especially EZH2 in both nucleus and cytoplasm can be potentially used as a prognostic marker for CCA.
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Identification of Transcriptional Signatures of Colon Tumor Stroma by a Meta-Analysis. JOURNAL OF ONCOLOGY 2019; 2019:8752862. [PMID: 31186640 PMCID: PMC6521457 DOI: 10.1155/2019/8752862] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Accepted: 03/31/2019] [Indexed: 12/24/2022]
Abstract
Background The tumor stroma plays pivotal roles in influencing tumor growth, invasion, and metastasis. Transcriptional signatures of colon tumor stroma (CTS) are significantly associated with prognosis of colon cancer. Thus, identification of the CTS transcriptional features could be useful for colon cancer diagnosis and therapy. Methods By a meta-analysis of three CTS gene expression profiles datasets, we identified differentially expressed genes (DEGs) between CTS and colon normal stroma. Furthermore, we identified the pathways, upstream regulators, and protein-protein interaction (PPI) network that were significantly associated with the DEGs. Moreover, we analyzed the enrichment levels of immune signatures in CTS. Finally, we identified CTS-associated gene signatures whose expression was significantly associated with prognosis in colon cancer. Results We identified numerous significantly upregulated genes (such as CTHRC1, NFE2L3, SULF1, SOX9, ENC1, and CCND1) and significantly downregulated genes (such as MYOT, ASPA, KIAA2022, ARHGEF37, BCL-2, and PPARGC1A) in CTS versus colon normal stroma. Furthermore, we identified significantly upregulated pathways in CTS that were mainly involved in cellular development, immune regulation, and metabolism, as well as significantly downregulated pathways in CTS that were mostly metabolism-related. Moreover, we identified upstream TFs (such as SUZ12, NFE2L2, RUNX1, STAT3, and SOX2), kinases (such as MAPK14, CSNK2A1, CDK1, CDK2, and CDK4), and master metabolic transcriptional regulators (MMTRs) (such as HNF1A, NFKB1, ZBTB7A, GATA2, and GATA5) regulating the DEGs. We found that CD8+ T cells were more enriched in CTS than in colon normal stroma. Interestingly, we found that many of the DEGs and their regulators were prognostic markers for colon cancer, including CEBPB, PPARGC1, STAT3, MTOR, BCL2, JAK2, and CDK1. Conclusions The identification of CTS-specific transcriptional signatures may provide insights into the tumor microenvironment that mediates the development of colon cancer and has potential clinical implications for colon cancer diagnosis and treatment.
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Lima-Fernandes E, Murison A, da Silva Medina T, Wang Y, Ma A, Leung C, Luciani GM, Haynes J, Pollett A, Zeller C, Duan S, Kreso A, Barsyte-Lovejoy D, Wouters BG, Jin J, Carvalho DDD, Lupien M, Arrowsmith CH, O'Brien CA. Targeting bivalency de-represses Indian Hedgehog and inhibits self-renewal of colorectal cancer-initiating cells. Nat Commun 2019; 10:1436. [PMID: 30926792 PMCID: PMC6441108 DOI: 10.1038/s41467-019-09309-4] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Accepted: 02/27/2019] [Indexed: 12/21/2022] Open
Abstract
In embryonic stem cells, promoters of key lineage-specific differentiation genes are found in a bivalent state, having both activating H3K4me3 and repressive H3K27me3 histone marks, making them poised for transcription upon loss of H3K27me3. Whether cancer-initiating cells (C-ICs) have similar epigenetic mechanisms that prevent lineage commitment is unknown. Here we show that colorectal C-ICs (CC-ICs) are maintained in a stem-like state through a bivalent epigenetic mechanism. Disruption of the bivalent state through inhibition of the H3K27 methyltransferase EZH2, resulted in decreased self-renewal of patient-derived C-ICs. Epigenomic analyses revealed that the promoter of Indian Hedgehog (IHH), a canonical driver of normal colonocyte differentiation, exists in a bivalent chromatin state. Inhibition of EZH2 resulted in de-repression of IHH, decreased self-renewal, and increased sensitivity to chemotherapy in vivo. Our results reveal an epigenetic block to differentiation in CC-ICs and demonstrate the potential for epigenetic differentiation therapy of a solid tumour through EZH2 inhibition.
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Affiliation(s)
- Evelyne Lima-Fernandes
- Structural Genomics Consortium, University of Toronto, Toronto, ON, M5G1L7, Canada.,Princess Margaret Cancer Centre, University Health Network, Toronto, ON, M5G1L7, Canada
| | - Alex Murison
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON, M5G1L7, Canada
| | - Tiago da Silva Medina
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON, M5G1L7, Canada
| | - Yadong Wang
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON, M5G1L7, Canada
| | - Anqi Ma
- Mount Sinai Center for Therapeutics Discovery, Departments of Pharmacological Sciences and Oncological Sciences, Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - Cherry Leung
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON, M5G1L7, Canada
| | - Genna M Luciani
- Structural Genomics Consortium, University of Toronto, Toronto, ON, M5G1L7, Canada.,Princess Margaret Cancer Centre, University Health Network, Toronto, ON, M5G1L7, Canada
| | - Jennifer Haynes
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON, M5G1L7, Canada
| | - Aaron Pollett
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, M5S1A8, Canada.,Lunenfeld-Tanenbaum Research Institute Toronto, Toronto, ON, M5G1X5, Canada
| | - Constanze Zeller
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON, M5G1L7, Canada
| | - Shili Duan
- Department of Medical Biophysics, University of Toronto, Toronto, ON, M5G1L7, Canada
| | - Antonija Kreso
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON, M5G1L7, Canada
| | | | - Bradly G Wouters
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON, M5G1L7, Canada.,Department of Medical Biophysics, University of Toronto, Toronto, ON, M5G1L7, Canada.,Department of Radiation Oncology, University of Toronto, Toronto, ON, M5G1L7, Canada
| | - Jian Jin
- Mount Sinai Center for Therapeutics Discovery, Departments of Pharmacological Sciences and Oncological Sciences, Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - Daniel D De Carvalho
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON, M5G1L7, Canada.,Department of Medical Biophysics, University of Toronto, Toronto, ON, M5G1L7, Canada
| | - Mathieu Lupien
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON, M5G1L7, Canada.,Department of Medical Biophysics, University of Toronto, Toronto, ON, M5G1L7, Canada.,Ontario Institute for Cancer Research, Toronto, ON, M5G1L7, Canada
| | - Cheryl H Arrowsmith
- Structural Genomics Consortium, University of Toronto, Toronto, ON, M5G1L7, Canada. .,Princess Margaret Cancer Centre, University Health Network, Toronto, ON, M5G1L7, Canada. .,Department of Medical Biophysics, University of Toronto, Toronto, ON, M5G1L7, Canada.
| | - Catherine A O'Brien
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON, M5G1L7, Canada. .,Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, M5S1A8, Canada. .,Department of Medical Biophysics, University of Toronto, Toronto, ON, M5G1L7, Canada. .,Department of Physiology, University of Toronto, Toronto, ON, M5G1L7, Canada. .,Department of Surgery, Toronto General Hospital, Toronto, ON, M5G2C4, Canada.
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Lin X, Xia Y, Hu D, Mao Q, Yu Z, Zhang H, Li C, Chen G, Liu F, Zhu W, Shi Y, Zhang H, Zheng J, Sun T, Xu J, Chao HH, Zheng X, Luο X. Transcriptome‑wide piRNA profiling in human gastric cancer. Oncol Rep 2019; 41:3089-3099. [PMID: 30896887 PMCID: PMC6448102 DOI: 10.3892/or.2019.7073] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2018] [Accepted: 03/08/2019] [Indexed: 12/11/2022] Open
Abstract
Piwi-interacting RNAs (piRNAs) comprise the largest class of non-coding RNAs. They represent a molecular feature shared by all non-aging biological systems, including germline and somatic cancer stem cells, which display an indefinite capacity of renewal and proliferation and are potentially immortal. They have been identified in animal stomachs, but their relationship with human gastric cancers remains largely unclear. The present study aimed to identify the piRNAs associated with human gastric cancers across the whole transcriptome. Fresh tumor tissues and adjacent non-tumorous tissues from stomachs were examined using a piRNA microarray (23,677 piRNAs) that was then validated by qPCR. The differential expression of piRNAs between cases and controls was analyzed. The transposable elements (TEs) that are potentially targeted by the risk piRNAs were searched. The expression of the nearest genes that are complementary to the sequences of the piRNAs was examined in the stomach tissue. The regulatory effects of genome-wide significant and replicated cancer-risk DNA variants on the piRNA expression in stomach were tested. Based on the findings, we identified a total of 8,759 piRNAs in human stomachs. Of all, 50 were significantly (P<0.05) and differentially (>2-fold change) expressed between the cases and controls, and 64.7% of the protein-coding genes potentially regulated by the gastric cancer-associated piRNAs were expressed in the human stomach. The expression of many cancer-associated piRNAs was correlated with the genome-wide and replicated cancer-risk SNPs. In conclusion, we conclude that piRNAs are abundant in human stomachs and may play important roles in the etiological processes of gastric cancers.
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Affiliation(s)
- Xiandong Lin
- Laboratory of Radiation Oncology and Radiobiology, Fujian Cancer Hospital and Fujian Medical University Cancer Hospital, Fuzhou, Fujian 350014, P.R. China
| | - Yan Xia
- Department of Pathology, Fujian Cancer Hospital and Fujian Medical University Cancer Hospital, Fuzhou, Fujian 350014, P.R. China
| | - Dan Hu
- Department of Pathology, Fujian Cancer Hospital and Fujian Medical University Cancer Hospital, Fuzhou, Fujian 350014, P.R. China
| | - Qiao Mao
- People's Hospital of Deyang City, Deyang, Sichun 618000, P.R. China
| | - Zongyang Yu
- Department of Medical Oncology, Fuzhou General Hospital of PLA, Fuzhou, Fujian 350025, P.R. China
| | - Hejun Zhang
- Department of Pathology, Fujian Cancer Hospital and Fujian Medical University Cancer Hospital, Fuzhou, Fujian 350014, P.R. China
| | - Chao Li
- Fujian Provincial Key Laboratory of Translational Cancer Medicine, Fuzhou, Fujian 350014, P.R. China
| | - Gang Chen
- Department of Pathology, Fujian Cancer Hospital and Fujian Medical University Cancer Hospital, Fuzhou, Fujian 350014, P.R. China
| | - Fen Liu
- Fujian University of Traditional Chinese Medicine, Fuzhou, Fujian 350002, P.R. China
| | - Weifeng Zhu
- Department of Pathology, Fujian Cancer Hospital and Fujian Medical University Cancer Hospital, Fuzhou, Fujian 350014, P.R. China
| | - Yi Shi
- Department of Pathology, Fujian Cancer Hospital and Fujian Medical University Cancer Hospital, Fuzhou, Fujian 350014, P.R. China
| | - Huihao Zhang
- The First Affiliated Hospital, Fujian Medical University, Fuzhou, Fujian 350001, P.R. China
| | - Jianming Zheng
- Huashan Hospital, Fudan University School of Medicine, Shanghai 200040, P.R. China
| | - Tao Sun
- Huashan Hospital, Fudan University School of Medicine, Shanghai 200040, P.R. China
| | - Jianying Xu
- Zhuhai Municipal Maternal and Children's Health Hospital, Zhuhai, Guangdong 519000, P.R. China
| | - Herta H Chao
- Department of Internal Medicine, Yale University School of Medicine, New Haven, CT 06510, P.R. China
| | - Xiongwei Zheng
- Fujian Provincial Key Laboratory of Translational Cancer Medicine, Fuzhou, Fujian 350014, P.R. China
| | - Xingguang Luο
- Huilongguan Hospital, Beijing University School of Clinical Medicine, Beijing 100096, P.R. China
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Xue C, Wang K, Jiang X, Gu C, Yu G, Zhong Y, Liu S, Nie Y, Zhou Y, Yang H. The Down-Regulation of SUZ12 Accelerates the Migration and Invasion of Liver Cancer Cells via Activating ERK1/2 Pathway. J Cancer 2019; 10:1375-1384. [PMID: 31031847 PMCID: PMC6485231 DOI: 10.7150/jca.29932] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Accepted: 01/18/2019] [Indexed: 12/13/2022] Open
Abstract
The suppressor of zest 12 (SUZ12), an essential subunit of the transcription polycomb repressive complex 2 (PRC2), has been found to be involved in HBV X-induced oncogenic transformation in hepatocellular carcinoma (HCC). However, the specific function of SUZ12 has not yet been determined in the pathogenesis of migration and invasion of HBV-associated HCC. Here, our results showed that SUZ12 was significantly down-regulated in HBV-related HCC tissues compared with adjacent non-tumor tissues by immunohistochemical and Western blot assays. The 5-years survival rate was worse in patients with low expression level of SUZ12. SUZ12 silencing increased the migration and invasion of HCC cells, and its overexpression impaired HCC cells migration and invasion. Knockdown of SUZ12 activated ERK1/2 pathway and increased MMP9 (matrix metallopeptidase 9) and MMP2 (matrix metallopeptidase 2) expression, whereas SUZ12 overexpression had opposite effects. Specific ERK1/2 inhibitor (SCH772984) significantly decreased HCC cells migration and invasion caused by SUZ12 shRNA. Thus, the liver cancer-down-regulated SUZ12 accelerated the invasion and metastasis of HCC cells. These effects might be associated with deregulation of SUZ12 activating ERK1/2, MMP2 and MMP9 in HCC cells.
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Affiliation(s)
- Cailin Xue
- Department of Gastroenterology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510260, P.R. China.,Department of Hepatobiliary Surgery, The Second Affiliation Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510260, P. R. China
| | - Kunyuan Wang
- Department of Gastroenterology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510260, P.R. China
| | - Xiaofeng Jiang
- Department of Hepatobiliary Surgery, The Second Affiliation Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510260, P. R. China
| | - Chengxin Gu
- Department of Gastroenterology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510260, P.R. China
| | - Ganxiang Yu
- Department of Gastroenterology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510260, P.R. China
| | - Yun Zhong
- Guangzhou Institute of Cardiovascular Disease, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510260, P.R. China
| | - Shiming Liu
- Guangzhou Institute of Cardiovascular Disease, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510260, P.R. China
| | - Yuqiang Nie
- Department of Gastroenterology, Guangzhou First People's Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510180, P.R. China
| | - Yongjian Zhou
- Department of Gastroenterology, Guangzhou First People's Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510180, P.R. China
| | - Hui Yang
- Department of Gastroenterology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510260, P.R. China
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Abstract
We aimed to investigate the significant role of long noncoding RNA X inactive specific transcript (XIST) in regulating tumor metastasis in colorectal cancer (CRC), as well as its possible mechanism. Expression of lncRNA XIST in CRC tissues and CRC cells was detected. CRC cells were transfected with pc-XIST, blank control si-XIST, or si-control, and then the effects of lncRNA XIST on CRC cell migration and invasion were investigated, along with the interaction between lncRNA XIST and miR-137. lncRNA XIST was upregulated in CRC tissues. Compared with HT29 cells that had low metastatic potential, XIST was markedly more highly expressed in LoVo cells that had a higher metastatic potential. Overexpression of XIST promoted the migratory and invasive potential of HT29 cells, while knockdown of XIST inhibited the migratory and invasive potential of LoVo cells. Moreover, epithelial-mesenchymal transition (EMT) markers, including E-cadherin, N-cadherin, and vimentin, exhibited corresponding expression changes. In addition, miR-137 was inhibited by XIST, and inhibition of miR-137 could reverse the effects of knockdown of XIST on the migratory and invasive potential of LoVo cells. Furthermore, enhancer of zeste homolog 2 (EZH2) was confirmed as a target of miR-137. Our data reveal that lncRNA XIST may promote tumor metastasis in CRC possibly through regulating the miR-137-EZH2 axis. lncRNA XIST may serve as a prognostic indicator for CRC progression.
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Affiliation(s)
- Xingxiang Liu
- *Department of Oncology, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu, P.R. China
- †Department of Oncology, The Second People’s Hospital of Taizhou, Taizhou, Jiangsu Province, P.R. China
| | - Lin Cui
- †Department of Oncology, The Second People’s Hospital of Taizhou, Taizhou, Jiangsu Province, P.R. China
| | - Dong Hua
- *Department of Oncology, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu, P.R. China
- ‡Department of Oncology, Affiliated Hospital of Jiangnan University, The Fourth People’s Hospital of Wuxi, Wuxi, Jiangsu, P.R. China
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Prognostic value of histone marks H3K27me3 and H3K9me3 and modifying enzymes EZH2, SETDB1 and LSD-1 in colorectal cancer. J Cancer Res Clin Oncol 2018; 144:2127-2137. [PMID: 30105513 DOI: 10.1007/s00432-018-2733-2] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Accepted: 08/04/2018] [Indexed: 12/27/2022]
Abstract
PURPOSE Studies on the performance of epigenetic-based biomarkers in colorectal cancer (CRC) are scarce and have shown contradictory results. Thus, we sought to examine the prognostic value of histone-modifying enzymes (EZH2, SETDB1 and LSD-1) and histone post-translational marks (H3K27me3 and H3K9me3) in CRC. METHODS A retrospective series of 207 CRC patients primarily submitted to surgery in a cancer center was included in this study. Clinicopathological data were retrieved. One representative paraffin block per case was selected for immunohistochemistry, including normal and CRC tissues whenever possible. The percentage of positive nuclear staining (digital image analysis) was used to classify patients into "low" and "high" expression groups for each biomarker. Correlations between immunoexpression levels, clinicopathological features and clinical outcomes [disease-specific (DSS) and disease-free (DFS) survival] were examined. Statistical significance was set at p < 0.05. RESULTS CRC tissues showed significantly lower expression of SETDB1 and higher expression of the remainder four biomarkers compared to normal mucosa. High EZH2 expression correlated with disease recurrence/progression, whereas low LSD1 expression and high H3K9me3 and H3K27me3 expression were associated with more advanced stage. In multivariable analysis, cases with high LSD1 expression displayed significantly better DSS and DFS (HR 0.477, 95% confidence interval: 0.247-0.923) adjusted for pathological TNM stage. CONCLUSION EZH2, SETDB1, LSD1, H3K9me3 and H3K27me3 expression are altered in CRC and may play a role in colorectal carcinogenesis. LSD1 immunoexpression levels independently predicted patient outcome in this cohort. Further investigations, using larger series, are warranted to confirm its potential clinical value and unravel underlying molecular mechanisms.
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EZH2 inhibition promotes methyl jasmonate-induced apoptosis of human colorectal cancer through the Wnt/β-catenin pathway. Oncol Lett 2018; 16:1231-1236. [PMID: 30061944 DOI: 10.3892/ol.2018.8779] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2016] [Accepted: 11/02/2017] [Indexed: 12/16/2022] Open
Abstract
Methyl jasmonate potentially induces the differentiation of human myeloid leukemia cells and inhibits their proliferation; it may induce the differentiation and apoptosis of human lymphocytic leukemia cells, but does not exert a damaging effect on normal lymphocytes. In the present study, the anticancer effect of methyl jasmonate on human colorectal cancer cells was investigated. Cell viability and apoptosis was assessed using a Cell Counting kit-8 assay and flow cytometry, respectively. Methyl jasmonate suppressed cell viability and induced apoptosis in human colorectal cancer cells. Additionally, methyl jasmonate increased the activation of caspase-3, inhibited the expression levels of enhancer of zeste 2 polycomb repressive complex 2 subunit (EZH2) and the Wnt/β-catenin pathway in human colorectal cancer. Downregulation of EZH2 expression enhanced the anticancer effect of methyl jasmonate on human colorectal cancer cells through suppression of the Wnt/β-catenin pathway. Thus, EZH2 downregulation promotes the anticancer effect of methyl jasmonate by inducing apoptosis in human colorectal cancer cells through the Wnt/β-catenin pathway.
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40
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Zhang J, Zhang J, Qiu W, Zhang J, Li Y, Kong E, Lu A, Xu J, Lu X. MicroRNA-1231 exerts a tumor suppressor role through regulating the EGFR/PI3K/AKT axis in glioma. J Neurooncol 2018; 139:547-562. [PMID: 29774498 PMCID: PMC6132976 DOI: 10.1007/s11060-018-2903-8] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Accepted: 05/09/2018] [Indexed: 11/26/2022]
Abstract
PURPOSE MicroRNAs (miRNAs) have been shown to be involved in the initiation and progression of glioma. However, the underlying molecular mechanisms are still unclear. METHODS We performed microarray analysis to evaluate miRNA expression levels in 158 glioma tissue samples, and examined miR-1231 levels in glioma samples and healthy brain tissues using qRT-PCR. In vitro analyses were performed using miR-1231 mimics, inhibitors, and siRNA targeting EGFR. We used flow cytometry, CCK-8 assays, and colony formation assays to examine glioma proliferation and cell cycle analysis. A dual luciferase reporter assay was performed to examine miR-1231 regulation of EGFR, and the effect of upregulated miR-1231 was investigated in a subcutaneous GBM model. RESULTS We found that miR-1231 expression was decreased in human glioma tissues and negatively correlated with EGFR levels. Moreover, the downregulation of miR-1231 negatively correlated with the clinical stage of human glioma patients. miR-1231 overexpression dramatically downregulated glioma cell proliferation, and suppressed tumor growth in a nude mouse model. Bioinformatics prediction and a luciferase assay confirmed EGFR as a direct target of miR-1231. EGFR overexpression abrogated the suppressive effect of miR-1231 on the PI3K/AKT pathway and G1 arrest. CONCLUSIONS Taken together, these results demonstrated that EGFR is a direct target of miR-1231. Our findings suggest that the miR-1231/EGFR axis may be a helpful future diagnostic target for malignant glioma.
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Affiliation(s)
- Jiale Zhang
- Department of Neurosurgery, The First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029, Jiangsu Province, People's Republic of China
| | - Jie Zhang
- Department of Neurosurgery, The First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029, Jiangsu Province, People's Republic of China
| | - Wenjin Qiu
- Department of Neurosurgery, The Affiliated Hospital of Guizhou Medical University, 28 Guiyi Street Road, Guiyang, 550004, Guizhou Province, People's Republic of China
| | - Jian Zhang
- Department of Neurosurgery, The First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029, Jiangsu Province, People's Republic of China
| | - Yangyang Li
- Department of Neurosurgery, The First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029, Jiangsu Province, People's Republic of China
| | - Enjun Kong
- Department of Emergency, Danyang People's Hospital of Jiangsu Province, 2 Xinmin West Road, Danyang, 212300, Jiangsu Province, People's Republic of China
| | - Ailin Lu
- Department of Neurosurgery, The First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029, Jiangsu Province, People's Republic of China
| | - Jia Xu
- Department of Neurosurgery, The First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029, Jiangsu Province, People's Republic of China
| | - Xiaoming Lu
- Department of Neurosurgery, The First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029, Jiangsu Province, People's Republic of China.
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Wu Y, Hu H, Zhang W, Li Z, Diao P, Wang D, Zhang W, Wang Y, Yang J, Cheng J. SUZ12 is a novel putative oncogene promoting tumorigenesis in head and neck squamous cell carcinoma. J Cell Mol Med 2018; 22:3582-3594. [PMID: 29667751 PMCID: PMC6010759 DOI: 10.1111/jcmm.13638] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Accepted: 03/08/2018] [Indexed: 12/16/2022] Open
Abstract
The suppressor of zest 12 (SUZ12), one of the core polycomb repressive complex 2 (PRC2) components, has increasingly appreciated as a key mediator during human tumorigenesis. However, its expression pattern and oncogenic roles in head and neck squamous cell carcinoma (HNSCC) remain largely unexplored yet. Here, we sought to determine its expression pattern, clinicopathological significance and biological roles in HNSCC. Through data mining and interrogation from multiple publicly available databases, our bioinformatics analyses revealed that SUZ12 mRNA was significantly overexpressed in multiple HNSCC patient cohorts. Moreover, SUZ12 protein was markedly up‐regulated in primary HNSCC samples from our patient cohort as assessed by immunohistochemical staining and its overexpression significantly associated with cervical node metastasis and reduced overall and disease‐free survival. In the 4‐nitroquinoline 1‐oxide (4NQO)‐induced HNSCC mouse model, increased SUZ12 immunostaining was observed along with disease progression from epithelial hyperplasia to squamous cell carcinoma in tongue. Furthermore, shRNA‐mediated SUZ12 knock‐down significantly inhibited cell proliferation, migration and invasion in HNSCC cells, and resulted in compromised tumour growth in vivo. Collectively, our data reveal that SUZ12 might serve as a putative oncogene by promoting cell proliferation, migration and invasion, and also a novel biomarker with diagnostic and prognostic significance for HNSCC.
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Affiliation(s)
- Yaping Wu
- Jiangsu Key Laboratory of Oral Disease, Nanjing Medical University, Jiangsu, China.,Department of Oral and Maxillofacial Surgery, Affiliated Stomatological Hospital, Nanjing Medical University, Jiangsu, China
| | - Huijun Hu
- Jiangsu Key Laboratory of Oral Disease, Nanjing Medical University, Jiangsu, China
| | - Wei Zhang
- Jiangsu Key Laboratory of Oral Disease, Nanjing Medical University, Jiangsu, China
| | - Zhongwu Li
- Department of Oral and Maxillofacial Surgery, Affiliated Stomatological Hospital, Nanjing Medical University, Jiangsu, China
| | - Pengfei Diao
- Jiangsu Key Laboratory of Oral Disease, Nanjing Medical University, Jiangsu, China.,Department of Oral and Maxillofacial Surgery, Affiliated Stomatological Hospital, Nanjing Medical University, Jiangsu, China
| | - Dongmiao Wang
- Department of Oral and Maxillofacial Surgery, Affiliated Stomatological Hospital, Nanjing Medical University, Jiangsu, China
| | - Wei Zhang
- Department of Oral Pathology, School of Stomatology, Nanjing Medical University, Jiangsu, China
| | - Yanling Wang
- Jiangsu Key Laboratory of Oral Disease, Nanjing Medical University, Jiangsu, China
| | - Jianrong Yang
- Department of Oral and Maxillofacial Surgery, Affiliated Stomatological Hospital, Nanjing Medical University, Jiangsu, China
| | - Jie Cheng
- Jiangsu Key Laboratory of Oral Disease, Nanjing Medical University, Jiangsu, China.,Department of Oral and Maxillofacial Surgery, Affiliated Stomatological Hospital, Nanjing Medical University, Jiangsu, China
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Key genes and regulatory networks involved in the initiation, progression and invasion of colorectal cancer. Future Sci OA 2018; 4:FSO278. [PMID: 29568567 PMCID: PMC5859335 DOI: 10.4155/fsoa-2017-0108] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Accepted: 12/05/2017] [Indexed: 02/06/2023] Open
Abstract
Aim Until now, identification of drug targets for treatment of patients with specific stages of colorectal cancer (CRC) has remained a challenging field of research. Herein, we aimed to identify the key genes and regulatory networks involved in each stage of CRC. Results The results of gene expression profiles were integrated with protein-protein interaction networks, and topologically analyzed. The most important regulatory genes (e.g., CDK1, UBC, ESR1 and ATXN1) and signaling pathways (e.g., Wnt, MAPK and JAK-STAT) in CRC initiation, progression and metastasis were identified. In vitro analysis confirmed some in silico findings. Conclusion Our study introduces functional hub genes, subnetworks, prioritizes signaling pathways and novel biomarkers in CRC that may guide further development of targeted therapy programs.
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El Bairi K, Tariq K, Himri I, Jaafari A, Smaili W, Kandhro AH, Gouri A, Ghazi B. Decoding colorectal cancer epigenomics. Cancer Genet 2018; 220:49-76. [PMID: 29310839 DOI: 10.1016/j.cancergen.2017.11.001] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Revised: 11/01/2017] [Accepted: 11/06/2017] [Indexed: 02/07/2023]
Abstract
Colorectal cancer (CRC) is very heterogeneous and presents different types of epigenetic alterations including DNA methylation, histone modifications and microRNAs. These changes are considered as characteristics of various observed clinical phenotypes. Undoubtedly, the discovery of epigenetic pathways with novel epigenetic-related mechanisms constitutes a promising advance in cancer biomarker discovery. In this review, we provide an evidence-based discussing of the current understanding of CRC epigenomics and its role in initiation, epithelial-to-mesenchymal transition and metastasis. We also discuss the recent findings regarding the potential clinical perspectives of these alterations as potent biomarkers for CRC diagnosis, prognosis, and therapy in the era of liquid biopsy.
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Affiliation(s)
- Khalid El Bairi
- Independent Research Team in Cancer Biology and Bioactive Compounds, Mohamed 1(st) University, Oujda, Morocco.
| | - Kanwal Tariq
- B-10 Jumani Center, Garden East, Karachi 74400, Pakistan
| | - Imane Himri
- Laboratory of Biochemistry, Faculty of Sciences, Mohamed I(st) Universiy, Oujda, Morocco; Delegation of the Ministry of Health, Oujda, Morocco
| | - Abdeslam Jaafari
- Laboratoire de Génie Biologique, Equipe d'Immunopharmacologie, Faculté des Sciences et Techniques, Université Sultan Moulay Slimane, Beni Mellal, Maroc
| | - Wiam Smaili
- Centre de Génomique Humaine, Faculté de Médecine et de Pharmacie, Université Mohamed V, Rabat, Maroc; Département de Génétique Médicale, Institut National d'Hygiène, Rabat, Maroc
| | - Abdul Hafeez Kandhro
- Department of Biochemistry, Healthcare Molecular and Diagnostic Laboratory, Hyderabad, Pakistan
| | - Adel Gouri
- Laboratory of Medical Biochemistry, Ibn Rochd University Hospital, Annaba, Algeria
| | - Bouchra Ghazi
- National Laboratory of Reference, Faculty of Medicine, Mohammed VI University of Health Sciences (UM6SS), Casablanca, Morocco
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Vilorio-Marqués L, Martín V, Diez-Tascón C, González-Sevilla MF, Fernández-Villa T, Honrado E, Davila-Batista V, Molina AJ. The role of EZH2 in overall survival of colorectal cancer: a meta-analysis. Sci Rep 2017; 7:13806. [PMID: 29061982 PMCID: PMC5653815 DOI: 10.1038/s41598-017-13670-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Accepted: 09/26/2017] [Indexed: 12/13/2022] Open
Abstract
Enhancer of zeste homolog 2 (EZH2) is the catalitic subunit of polycomb repressive complex 2 and mediates gene silencing. EZH2 is overexpressed in many cancers and correlates with poor prognosis. The role of the gene EZH2 in colorectal cancer survival is uncertainly, the aim of this study is clear this relationship. Relevant literaure was searched from electronic databases. A meta-analysis was performed with elegible studies which quantitatively evaluated the relationship between EZH2 overexpression and survival of patients with colorectal cancer. Survival data were aggregated and quantitatively analyzed. We performed a meta-analysis of 8 studies (n = 1059 patients) that evaluated the correlation between EZH2 overexpression and survival in patients with colorectal cancer. Combined hazard ratios suggested that EZH2 overexpression was associated with better prognosis of overall survival (OS) HR(hazard ratio) = 0.61 95% CI (0.38-0.84) We performed bias analysis according Egger and Begg,s test and we did not find publication bias. EZH2 overexpression indicates a better prognosis for colorectal cancer.
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Affiliation(s)
- Laura Vilorio-Marqués
- GIIGAS: Grupo de Investigación en Interacción Gen-Ambiente-Salud, Dpt of Biomedical Sciences, Area of Preventive Medicine and Public Health, Instituto de Biomedicina (IBIOMED), University of León, Leon, Spain
| | - Vicente Martín
- GIIGAS: Grupo de Investigación en Interacción Gen-Ambiente-Salud, Dpt of Biomedical Sciences, Area of Preventive Medicine and Public Health, Instituto de Biomedicina (IBIOMED), University of León, Leon, Spain
- CIBERESP, CIBER de Epidemiología y Salud Pública, Madrid, Spain
| | - Cristina Diez-Tascón
- Banco de Tumores, Servicio de Anatomía Patológica, Complejo Asistencial Universitario de León, Leon, Spain
| | - María Francisca González-Sevilla
- GIIGAS: Grupo en interacción Gen-Ambiente-Salud, Dpt of Biomedical Sciences, Area of Physiology, University of León, Leon, Spain
| | - Tania Fernández-Villa
- GIIGAS: Grupo de Investigación en Interacción Gen-Ambiente-Salud, Dpt of Biomedical Sciences, Area of Preventive Medicine and Public Health, Instituto de Biomedicina (IBIOMED), University of León, Leon, Spain
| | - Emiliano Honrado
- Servicio de Anatomía Patológica, Complejo Asistencial Universitario de León, Leon, Spain
| | - Veronica Davila-Batista
- GIIGAS: Grupo de Investigación en Interacción Gen-Ambiente-Salud, Dpt of Biomedical Sciences, Area of Preventive Medicine and Public Health, Instituto de Biomedicina (IBIOMED), University of León, Leon, Spain
| | - Antonio J Molina
- GIIGAS: Grupo de Investigación en Interacción Gen-Ambiente-Salud, Dpt of Biomedical Sciences, Area of Preventive Medicine and Public Health, Instituto de Biomedicina (IBIOMED), University of León, Leon, Spain.
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Polycomb Repressor Complex 2 in Genomic Instability and Cancer. Int J Mol Sci 2017; 18:ijms18081657. [PMID: 28758948 PMCID: PMC5578047 DOI: 10.3390/ijms18081657] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Revised: 07/19/2017] [Accepted: 07/25/2017] [Indexed: 02/07/2023] Open
Abstract
Polycomb repressor complexes PRC1 and PRC2 regulate chromatin compaction and gene expression, and are widely recognized for their fundamental contributions to developmental processes. Herein, we summarize the existing evidence and molecular mechanisms linking PRC-mediated epigenetic aberrations to genomic instability and malignancy, with a particular focus on the role of deregulated PRC2 in tumor suppressor gene expression, the DNA damage response, and the fidelity of DNA replication. We also discuss some of the recent advances in the development of pharmacological and dietary interventions affecting PRC2, which point to promising applications for the prevention and management of human malignancies.
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Li P, Zhang X, Wang L, Du L, Yang Y, Liu T, Li C, Wang C. lncRNA HOTAIR Contributes to 5FU Resistance through Suppressing miR-218 and Activating NF-κB/TS Signaling in Colorectal Cancer. MOLECULAR THERAPY. NUCLEIC ACIDS 2017; 8:356-369. [PMID: 28918035 PMCID: PMC5537205 DOI: 10.1016/j.omtn.2017.07.007] [Citation(s) in RCA: 104] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Revised: 07/06/2017] [Accepted: 07/06/2017] [Indexed: 12/30/2022]
Abstract
One major reason for the failure of advanced colorectal cancer (CRC) treatment is the occurrence of chemoresistance to fluoropyrimidine (FU)-based chemotherapy. Long non-coding RNA HOTAIR has been considered as a pro-oncogene in multiple cancers. However, the precise functional mechanism of HOTAIR in chemoresistance is not well known. In this study, we investigated the biological and clinical role of HOTAIR in 5FU resistance in CRC. Our results showed that HOTAIR negatively regulated miR-218 expression in CRC through an EZH2-targeting miR-218-2 promoter regulatory axis. HOTAIR knockdown dramatically inhibited cell viability and induced G1-phase arrest by promoting miR-218 expression. VOPP1 was shown to be a functional target of miR-218, and the main downstream signaling, NF-κB, was inactivated by HOTAIR through the suppression of miR-218 expression. Additionally, HOTAIR knockdown partially reversed 5FU resistance through promoting miR-218 and inactivating NF-κB signaling. Furthermore, HOTAIR restrained 5FU-induced cytotoxicity on CRC cells through promotion of thymidylate synthase expression. More importantly, high HOTAIR expression was associated with poor response to 5FU treatment. In conclusion, we demonstrated that HOTAIR contributes to 5FU resistance through suppressing miR-218 and activating NF-κB signaling in CRC. Thus, HOTAIR may serve as a promising therapeutic target for CRC patients.
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Affiliation(s)
- Peilong Li
- Department of Clinical Laboratory, The Second Hospital of Shandong University, Jinan, 250033 Shandong Province, China
| | - Xin Zhang
- Department of Clinical Laboratory, Qilu Hospital, Shandong University, Jinan, 250012 Shandong Province, China
| | - Lili Wang
- Department of Clinical Laboratory, Qilu Hospital, Shandong University, Jinan, 250012 Shandong Province, China
| | - Lutao Du
- Department of Clinical Laboratory, Qilu Hospital, Shandong University, Jinan, 250012 Shandong Province, China
| | - Yongmei Yang
- Department of Clinical Laboratory, Qilu Hospital, Shandong University, Jinan, 250012 Shandong Province, China
| | - Tong Liu
- Department of Clinical Laboratory, The Second Hospital of Shandong University, Jinan, 250033 Shandong Province, China
| | - Chen Li
- Department of Clinical Laboratory, The Second Hospital of Shandong University, Jinan, 250033 Shandong Province, China
| | - Chuanxin Wang
- Department of Clinical Laboratory, The Second Hospital of Shandong University, Jinan, 250033 Shandong Province, China.
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Hyun K, Jeon J, Park K, Kim J. Writing, erasing and reading histone lysine methylations. Exp Mol Med 2017; 49:e324. [PMID: 28450737 PMCID: PMC6130214 DOI: 10.1038/emm.2017.11] [Citation(s) in RCA: 694] [Impact Index Per Article: 99.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Accepted: 12/20/2016] [Indexed: 02/08/2023] Open
Abstract
Histone modifications are key epigenetic regulatory features that have important roles in many cellular events. Lysine methylations mark various sites on the tail and globular domains of histones and their levels are precisely balanced by the action of methyltransferases ('writers') and demethylases ('erasers'). In addition, distinct effector proteins ('readers') recognize specific methyl-lysines in a manner that depends on the neighboring amino-acid sequence and methylation state. Misregulation of histone lysine methylation has been implicated in several cancers and developmental defects. Therefore, histone lysine methylation has been considered a potential therapeutic target, and clinical trials of several inhibitors of this process have shown promising results. A more detailed understanding of histone lysine methylation is necessary for elucidating complex biological processes and, ultimately, for developing and improving disease treatments. This review summarizes enzymes responsible for histone lysine methylation and demethylation and how histone lysine methylation contributes to various biological processes.
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Affiliation(s)
- Kwangbeom Hyun
- Laboratory of Eukaryotic Transcription, Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, South Korea
| | - Jongcheol Jeon
- Laboratory of Eukaryotic Transcription, Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, South Korea
| | - Kihyun Park
- Laboratory of Eukaryotic Transcription, Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, South Korea
| | - Jaehoon Kim
- Laboratory of Eukaryotic Transcription, Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, South Korea
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Overexpression of suppressor of zest 12 is associated with cervical node metastasis and unfavorable prognosis in tongue squamous cell carcinoma. Cancer Cell Int 2017; 17:26. [PMID: 28228691 PMCID: PMC5307854 DOI: 10.1186/s12935-017-0395-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Accepted: 02/04/2017] [Indexed: 12/15/2022] Open
Abstract
OBJECTIVE Increased expression of suppressor of zest 12 (SUZ12), a core component of the polycomb repressive complex 2, contributes to human tumorigenesis and associates with patient prognosis. In the present study, we sought to investigate the expression of SUZ12 and its clinicopathological significance in primary tongue squamous cell carcinoma (TSCC). METHODS The expression of SUZ12 protein was determined by immunohistochemistry in clinical samples from a retrospective cohort of 72 patients with primary TSCC who were treated at our institution from Jan. 2007 to Dec. 2013. The potential associations between SUZ12 abundance and multiple clinicopathological parameters were assessed by Chi square test. Moreover, the effect of SUZ12 expression on patients' survival was further estimated by Kaplan-Meier and Cox regression analyses. RESULTS Our immunohistochemical staining data revealed aberrant overexpression of SUZ12 in a large subset of TSCC as compared to normal tongue mucosa. Elevated SUZ12 was found to be significantly associated with cervical nodes metastasis (P = 0.0325) and reduced overall as well as disease-free survival (Log-rank test, P = 0.0225, 0.0179, respectively). Both univariate and multivariate Cox regression analysis identified the expression status of SUZ12 (low/high) as an important independent prognostic factor for patients' survival. CONCLUSIONS Our data reveal that aberrant SUZ12 overexpression is associated with cervical nodes metastasis and reduced survival in TSCC. These findings suggest that SUZ12 might play critical roles during tongue tumorigenesis and serve as a novel biomarker with diagnostic and prognostic significance.
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Li P, Zhang X, Wang H, Wang L, Liu T, Du L, Yang Y, Wang C. MALAT1 Is Associated with Poor Response to Oxaliplatin-Based Chemotherapy in Colorectal Cancer Patients and Promotes Chemoresistance through EZH2. Mol Cancer Ther 2017; 16:739-751. [PMID: 28069878 DOI: 10.1158/1535-7163.mct-16-0591] [Citation(s) in RCA: 193] [Impact Index Per Article: 27.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Revised: 12/03/2016] [Accepted: 12/23/2016] [Indexed: 12/21/2022]
Abstract
A major reason for oxaliplatin chemoresistance in colorectal cancer is the acquisition of epithelial-mesenchymal transition (EMT) in cancer cells. The long noncoding RNA (lncRNA), MALAT1, is a highly conserved nuclear ncRNA and a key regulator of metastasis development in several cancers. However, its role in oxaliplatin-induced metastasis and chemoresistance is not well known. In this study, we aim to investigate the prognostic and therapeutic role of lncRNA MALAT1 in colorectal cancer patients receiving oxaliplatin-based therapy and further explore the potential transcriptional regulation through interaction with EZH2 based on the established HT29 oxaliplatin-resistant cells. Our results showed that high MALAT1 expression was associated with reduced patient survival and poor response to oxaliplatin-based chemotherapy in advanced colorectal cancer patients. Oxaliplatin-resistant colorectal cancer cells exhibited high MALAT1 expression and EMT. LncRNA MALAT1 knockdown enhances E-cadherin expression and inhibits oxaliplatin-induced EMT in colorectal cancer cells. EZH2 is highly expressed and associated with the 3' end region of lncRNA MALAT1 in colorectal cancer, and this association suppressed the expression of E-cadherin. Furthermore, targeted inhibition of MALAT1 or EZH2 reversed EMT and chemoresistance induced by oxaliplatin. Finally, the interaction between lncRNA MALAT1 and miR-218 was observed, which further indicated its prognostic value in patients who received standard FOLFOX (oxaliplatin combine with 5-fluorouracil and leucovorin) treatment. In conclusion, this study illuminates the prognostic role of lncRNA MALAT1 in colorectal cancer patients receiving oxaliplatin-based treatment and further demonstrates how lncRNA MALAT1 confers a chemoresistant function in colorectal cancer. Thus, lncRNA MALAT1 may serve as a promising prognostic and therapeutic target for colorectal cancer patients. Mol Cancer Ther; 16(4); 739-51. ©2017 AACR.
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Affiliation(s)
- Peilong Li
- 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
| | - Haiyan Wang
- Department of Clinical Laboratory, Women & Children's Hospital of Linyi, Linyi, Shandong Province, China
| | - Lili Wang
- Department of Clinical Laboratory, Qilu Hospital, Shandong University, Jinan, Shandong Province, China
| | - Tong Liu
- 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
| | - Yongmei Yang
- Department of Clinical Laboratory, Qilu Hospital, Shandong University, Jinan, Shandong Province, China
| | - Chuanxin Wang
- Department of Clinical Laboratory, The Second Hospital of Shandong University, Jinan, Shandong Province, China.
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