1
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García de Herreros A. Dual role of Snail1 as transcriptional repressor and activator. Biochim Biophys Acta Rev Cancer 2024; 1879:189037. [PMID: 38043804 DOI: 10.1016/j.bbcan.2023.189037] [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: 10/24/2023] [Revised: 11/27/2023] [Accepted: 11/27/2023] [Indexed: 12/05/2023]
Abstract
Snail1 transcriptional factor plays a key role in the control of epithelial to mesenchymal transition, a process that remodels tumor cells increasing their invasion and chemo-resistance as well as reprograms their metabolism and provides stemness properties. During this transition, Snail1 acts as a transcriptional repressor and, as growing evidences have demonstrated, also as a direct activator of mesenchymal genes. In this review, I describe the different proteins that interact with Snail1 and are responsible for these two different functions on gene expression; I focus on the transcriptional factors that associate to Snail1 in their target promoters, both activated and repressed. I also present working models for Snail1 action both as repressor and activator and raise some issues that still need to be investigated.
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Affiliation(s)
- Antonio García de Herreros
- Programa de Recerca en Càncer, Hospital del Mar Research Institute (IMIM), Unidad Asociada al CSIC, Barcelona, Spain; Departament de Medicina i Ciències de la Vida, Universitat Pompeu Fabra, Barcelona, Spain.
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2
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Abstract
Neural crest cells (NCCs) are a dynamic, multipotent, vertebrate-specific population of embryonic stem cells. These ectodermally-derived cells contribute to diverse tissue types in developing embryos including craniofacial bone and cartilage, the peripheral and enteric nervous systems and pigment cells, among a host of other cell types. Due to their contribution to a significant number of adult tissue types, the mechanisms that drive their formation, migration and differentiation are highly studied. NCCs have a unique ability to transition from tightly adherent epithelial cells to mesenchymal and migratory cells by altering their polarity, expression of cell-cell adhesion molecules and gaining invasive abilities. In this Review, we discuss classical and emerging factors driving NCC epithelial-to-mesenchymal transition and migration, highlighting the role of signaling and transcription factors, as well as novel modifying factors including chromatin remodelers, small RNAs and post-translational regulators, which control the availability and longevity of major NCC players.
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Affiliation(s)
| | - Crystal D. Rogers
- Department of Anatomy, Physiology, and Cell Biology, UC Davis School of Veterinary Medicine, 1089 Veterinary Medicine Drive, Davis, CA 95616, USA
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3
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Zhao W, Dai S, Yue L, Xu F, Gu J, Dai X, Qian X. Emerging mechanisms progress of colorectal cancer liver metastasis. Front Endocrinol (Lausanne) 2022; 13:1081585. [PMID: 36568117 PMCID: PMC9772455 DOI: 10.3389/fendo.2022.1081585] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Accepted: 11/28/2022] [Indexed: 12/12/2022] Open
Abstract
Colorectal cancer (CRC) is the third most common malignancy and the second most common cause of cancer-related mortality worldwide. A total of 20% of CRC patients present with distant metastasis. The hepatic portal venous system, responsible for collecting most intestinal blood, makes the liver the most common site of CRC metastasis. The formation of liver metastases from colorectal cancer is a long and complex process. It involves the maintenance of primary tumors, vasculature invasion, distant colonization, and metastasis formation. In this review, we serve on how the CRC cells acquire stemness, invade the vascular, and colonize the liver. In addition, we highlight how the resident cells of the liver and immune cells interact with CRC cells. We also discuss the current immunotherapy approaches and challenges we face, and finally, we look forward to finding new therapeutic targets based on novel sequencing technologies.
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4
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Huang X, Ferris ST, Kim S, Choudhary MNK, Belk JA, Fan C, Qi Y, Sudan R, Xia Y, Desai P, Chen J, Ly N, Shi Q, Bagadia P, Liu T, Guilliams M, Egawa T, Colonna M, Diamond MS, Murphy TL, Satpathy AT, Wang T, Murphy KM. Differential usage of transcriptional repressor Zeb2 enhancers distinguishes adult and embryonic hematopoiesis. Immunity 2021; 54:1417-1432.e7. [PMID: 34004142 PMCID: PMC8282756 DOI: 10.1016/j.immuni.2021.04.015] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 03/02/2021] [Accepted: 04/14/2021] [Indexed: 12/11/2022]
Abstract
The transcriptional repressor ZEB2 regulates development of many cell fates among somatic, neural, and hematopoietic lineages, but the basis for its requirement in these diverse lineages is unclear. Here, we identified a 400-basepair (bp) region located 165 kilobases (kb) upstream of the Zeb2 transcriptional start site (TSS) that binds the E proteins at several E-box motifs and was active in hematopoietic lineages. Germline deletion of this 400-bp region (Zeb2Δ-165mice) specifically prevented Zeb2 expression in hematopoietic stem cell (HSC)-derived lineages. Zeb2Δ-165 mice lacked development of plasmacytoid dendritic cells (pDCs), monocytes, and B cells. All macrophages in Zeb2Δ-165 mice were exclusively of embryonic origin. Using single-cell chromatin profiling, we identified a second Zeb2 enhancer located at +164-kb that was selectively active in embryonically derived lineages, but not HSC-derived ones. Thus, Zeb2 expression in adult, but not embryonic, hematopoiesis is selectively controlled by the -165-kb Zeb2 enhancer.
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Affiliation(s)
- Xiao Huang
- Department of Pathology and Immunology, Washington University in St. Louis, School of Medicine, St. Louis, MO 63110, USA
| | - Stephen T Ferris
- Department of Pathology and Immunology, Washington University in St. Louis, School of Medicine, St. Louis, MO 63110, USA
| | - Sunkyung Kim
- Department of Pathology and Immunology, Washington University in St. Louis, School of Medicine, St. Louis, MO 63110, USA
| | - Mayank N K Choudhary
- Department of Genetics, Washington University in St. Louis, School of Medicine, St. Louis, MO 63110, USA; The Edison Family Center for Genome Sciences and Systems Biology, Washington University in St. Louis, School of Medicine, St. Louis, MO 63110, USA
| | - Julia A Belk
- Department of Computer Science, Stanford University, Stanford, CA, USA
| | - Changxu Fan
- Department of Genetics, Washington University in St. Louis, School of Medicine, St. Louis, MO 63110, USA; The Edison Family Center for Genome Sciences and Systems Biology, Washington University in St. Louis, School of Medicine, St. Louis, MO 63110, USA
| | - Yanyan Qi
- Department of Pathology, Stanford University School of Medicine, Stanford, CA, USA
| | - Raki Sudan
- Department of Pathology and Immunology, Washington University in St. Louis, School of Medicine, St. Louis, MO 63110, USA
| | - Yu Xia
- Department of Pathology and Immunology, Washington University in St. Louis, School of Medicine, St. Louis, MO 63110, USA
| | - Pritesh Desai
- Department of Medicine, Washington University in St. Louis, School of Medicine, St. Louis, MO 63110, USA
| | - Jing Chen
- Department of Pathology and Immunology, Washington University in St. Louis, School of Medicine, St. Louis, MO 63110, USA
| | - Nghi Ly
- Department of Pathology, Stanford University School of Medicine, Stanford, CA, USA
| | - Quanming Shi
- Department of Pathology, Stanford University School of Medicine, Stanford, CA, USA
| | - Prachi Bagadia
- Department of Oncology, Amgen, 1120 Veterans Boulevard, South San Francisco, CA 94080, USA
| | - Tiantian Liu
- Department of Pathology and Immunology, Washington University in St. Louis, School of Medicine, St. Louis, MO 63110, USA
| | - Martin Guilliams
- Unit of Immunoregulation and Mucosal Immunology, VIB Inflammation Research Center, Ghent 9052, Belgium; Department of Biomedical Molecular Biology, Ghent University, Ghent 9000, Belgium
| | - Takeshi Egawa
- Department of Pathology and Immunology, Washington University in St. Louis, School of Medicine, St. Louis, MO 63110, USA
| | - Marco Colonna
- Department of Pathology and Immunology, Washington University in St. Louis, School of Medicine, St. Louis, MO 63110, USA
| | - Michael S Diamond
- Department of Pathology and Immunology, Washington University in St. Louis, School of Medicine, St. Louis, MO 63110, USA; Department of Medicine, Washington University in St. Louis, School of Medicine, St. Louis, MO 63110, USA; Department of Molecular Microbiology, Washington University in St. Louis, School of Medicine, St. Louis, MO 63110, USA; The Andrew M. and Jane M. Bursky Center for Human Immunology and Immunotherapy Programs, Washington University in St. Louis, School of Medicine, St. Louis, MO 63110, USA
| | - Theresa L Murphy
- Department of Pathology and Immunology, Washington University in St. Louis, School of Medicine, St. Louis, MO 63110, USA
| | - Ansuman T Satpathy
- Department of Pathology, Stanford University School of Medicine, Stanford, CA, USA
| | - Ting Wang
- Department of Genetics, Washington University in St. Louis, School of Medicine, St. Louis, MO 63110, USA; The Edison Family Center for Genome Sciences and Systems Biology, Washington University in St. Louis, School of Medicine, St. Louis, MO 63110, USA; McDonnell Genome Institute, Washington University in St. Louis, School of Medicine, St. Louis, MO 63110, USA
| | - Kenneth M Murphy
- Department of Pathology and Immunology, Washington University in St. Louis, School of Medicine, St. Louis, MO 63110, USA.
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5
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Birkhoff JC, Huylebroeck D, Conidi A. ZEB2, the Mowat-Wilson Syndrome Transcription Factor: Confirmations, Novel Functions, and Continuing Surprises. Genes (Basel) 2021; 12:1037. [PMID: 34356053 PMCID: PMC8304685 DOI: 10.3390/genes12071037] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 06/30/2021] [Accepted: 07/01/2021] [Indexed: 12/15/2022] Open
Abstract
After its publication in 1999 as a DNA-binding and SMAD-binding transcription factor (TF) that co-determines cell fate in amphibian embryos, ZEB2 was from 2003 studied by embryologists mainly by documenting the consequences of conditional, cell-type specific Zeb2 knockout (cKO) in mice. In between, it was further identified as causal gene causing Mowat-Wilson Syndrome (MOWS) and novel regulator of epithelial-mesenchymal transition (EMT). ZEB2's functions and action mechanisms in mouse embryos were first addressed in its main sites of expression, with focus on those that helped to explain neurodevelopmental and neural crest defects seen in MOWS patients. By doing so, ZEB2 was identified in the forebrain as the first TF that determined timing of neuro-/gliogenesis, and thereby also the extent of different layers of the cortex, in a cell non-autonomous fashion, i.e., by its cell-intrinsic control within neurons of neuron-to-progenitor paracrine signaling. Transcriptomics-based phenotyping of Zeb2 mutant mouse cells have identified large sets of intact-ZEB2 dependent genes, and the cKO approaches also moved to post-natal brain development and diverse other systems in adult mice, including hematopoiesis and various cell types of the immune system. These new studies start to highlight the important adult roles of ZEB2 in cell-cell communication, including after challenge, e.g., in the infarcted heart and fibrotic liver. Such studies may further evolve towards those documenting the roles of ZEB2 in cell-based repair of injured tissue and organs, downstream of actions of diverse growth factors, which recapitulate developmental signaling principles in the injured sites. Evident questions are about ZEB2's direct target genes, its various partners, and ZEB2 as a candidate modifier gene, e.g., in other (neuro)developmental disorders, but also the accurate transcriptional and epigenetic regulation of its mRNA expression sites and levels. Other questions start to address ZEB2's function as a niche-controlling regulatory TF of also other cell types, in part by its modulation of growth factor responses (e.g., TGFβ/BMP, Wnt, Notch). Furthermore, growing numbers of mapped missense as well as protein non-coding mutations in MOWS patients are becoming available and inspire the design of new animal model and pluripotent stem cell-based systems. This review attempts to summarize in detail, albeit without discussing ZEB2's role in cancer, hematopoiesis, and its emerging roles in the immune system, how intense ZEB2 research has arrived at this exciting intersection.
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Affiliation(s)
- Judith C. Birkhoff
- Department of Cell Biology, Erasmus University Medical Center, 3015 CN Rotterdam, The Netherlands; (J.C.B.); (D.H.)
| | - Danny Huylebroeck
- Department of Cell Biology, Erasmus University Medical Center, 3015 CN Rotterdam, The Netherlands; (J.C.B.); (D.H.)
- Department of Development and Regeneration, Unit Stem Cell and Developmental Biology, Biomedical Sciences Group, KU Leuven, 3000 Leuven, Belgium
| | - Andrea Conidi
- Department of Cell Biology, Erasmus University Medical Center, 3015 CN Rotterdam, The Netherlands; (J.C.B.); (D.H.)
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6
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Cai Y, Wang B, Li B, Huang X, Guo H, Liu Y, Chen B, Zhao S, Wu S, Li W, Wang L, Jia K, Wang H, Chen P, Jiang M, Tang X, Qi H, Dai C, Ye J, He Y. Collection on reports of molecules linked to epithelial-mesenchymal transition in the process of treating metastasizing cancer: a narrative review. ANNALS OF TRANSLATIONAL MEDICINE 2021; 9:946. [PMID: 34350261 PMCID: PMC8263858 DOI: 10.21037/atm-20-7002] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Accepted: 04/12/2021] [Indexed: 12/26/2022]
Abstract
Epithelial-mesenchymal transition (EMT) is a morphological process in which epithelial cells transform into mesenchymal cells via a specific procedure. EMT plays an important role in the cancer invasion-metastasis cascade and the current treatment of metastatic cancer, influences the migration, polarity, and adhesion of tumor cells, promotes their migration, invasiveness, anti-apoptotic ability. It contributes to the changes of the tumor microenvironment and suppresses the sensitivity of tumor cells to chemotherapy, causing cancer metastasis and worse, hindering the control and therapy of it. This paper reviews the mechanisms, detection, and treatments of cancer metastasis that have been identified and applied to date, summarizes the EMT-related biological molecules, providing a reference for EMT-targeted research and therapy. As EMT is significant in the progress of tumor metastasis, it is meaningful for the therapy and control of metastatic cancer to understand the mechanism of EMT at the molecular level. We summarized the mechanisms, detection and therapeutic implications of EMT, listed the research progress of molecules like genes, miRNAs, signaling pathways in EMT. We also discussed the prospects of EMT-targeted treatment in cancer metastasis interventions and the challenges the treatment and researches are facing. The summary is conducive to the treatment and further research of EMT and metastatic cancer.
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Affiliation(s)
- Yiyi Cai
- Department of Medical Oncology, Shanghai Pulmonary Hospital, Tongji University Medical School Cancer Institute, Tongji University School of Medicine, Shanghai, China.,Medical School, Tongji University, Shanghai, China
| | - Boyuan Wang
- Department of Medical Oncology, Shanghai Pulmonary Hospital, Tongji University Medical School Cancer Institute, Tongji University School of Medicine, Shanghai, China.,Medical School, Tongji University, Shanghai, China
| | - Bingying Li
- Department of Medical Oncology, Shanghai Pulmonary Hospital, Tongji University Medical School Cancer Institute, Tongji University School of Medicine, Shanghai, China.,Medical School, Tongji University, Shanghai, China
| | - Xintong Huang
- Department of Medical Oncology, Shanghai Pulmonary Hospital, Tongji University Medical School Cancer Institute, Tongji University School of Medicine, Shanghai, China.,Medical School, Tongji University, Shanghai, China
| | - Haoyue Guo
- Department of Medical Oncology, Shanghai Pulmonary Hospital, Tongji University Medical School Cancer Institute, Tongji University School of Medicine, Shanghai, China.,Medical School, Tongji University, Shanghai, China
| | - Yu Liu
- Department of Medical Oncology, Shanghai Pulmonary Hospital, Tongji University Medical School Cancer Institute, Tongji University School of Medicine, Shanghai, China.,Medical School, Tongji University, Shanghai, China
| | - Bin Chen
- Department of Medical Oncology, Shanghai Pulmonary Hospital, Tongji University Medical School Cancer Institute, Tongji University School of Medicine, Shanghai, China
| | - Sha Zhao
- Department of Medical Oncology, Shanghai Pulmonary Hospital, Tongji University Medical School Cancer Institute, Tongji University School of Medicine, Shanghai, China
| | - Shengyu Wu
- Department of Medical Oncology, Shanghai Pulmonary Hospital, Tongji University Medical School Cancer Institute, Tongji University School of Medicine, Shanghai, China.,Medical School, Tongji University, Shanghai, China
| | - Wei Li
- Department of Medical Oncology, Shanghai Pulmonary Hospital, Tongji University Medical School Cancer Institute, Tongji University School of Medicine, Shanghai, China
| | - Lei Wang
- Department of Medical Oncology, Shanghai Pulmonary Hospital, Tongji University Medical School Cancer Institute, Tongji University School of Medicine, Shanghai, China
| | - Keyi Jia
- Department of Medical Oncology, Shanghai Pulmonary Hospital, Tongji University Medical School Cancer Institute, Tongji University School of Medicine, Shanghai, China.,Medical School, Tongji University, Shanghai, China
| | - Hao Wang
- Department of Medical Oncology, Shanghai Pulmonary Hospital, Tongji University Medical School Cancer Institute, Tongji University School of Medicine, Shanghai, China.,Medical School, Tongji University, Shanghai, China
| | - Peixin Chen
- Department of Medical Oncology, Shanghai Pulmonary Hospital, Tongji University Medical School Cancer Institute, Tongji University School of Medicine, Shanghai, China.,Medical School, Tongji University, Shanghai, China
| | - Minlin Jiang
- Department of Medical Oncology, Shanghai Pulmonary Hospital, Tongji University Medical School Cancer Institute, Tongji University School of Medicine, Shanghai, China.,Medical School, Tongji University, Shanghai, China
| | - Xuzhen Tang
- Oncology and Immunology BU, Research Service Division, WuXi Apptec, Shanghai, China
| | - Hui Qi
- Oncology and Immunology BU, Research Service Division, WuXi Apptec, Shanghai, China
| | - Chunlei Dai
- Oncology and Immunology BU, Research Service Division, WuXi Apptec, Shanghai, China
| | - Junyan Ye
- Department of Medical Oncology, Shanghai Pulmonary Hospital, Tongji University Medical School Cancer Institute, Tongji University School of Medicine, Shanghai, China
| | - Yayi He
- Department of Medical Oncology, Shanghai Pulmonary Hospital, Tongji University Medical School Cancer Institute, Tongji University School of Medicine, Shanghai, China
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7
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Menuchin-Lasowski Y, Dagan B, Conidi A, Cohen-Gulkar M, David A, Ehrlich M, Giladi PO, Clark BS, Blackshaw S, Shapira K, Huylebroeck D, Henis YI, Ashery-Padan R. Zeb2 regulates the balance between retinal interneurons and Müller glia by inhibition of BMP-Smad signaling. Dev Biol 2020; 468:80-92. [PMID: 32950463 DOI: 10.1016/j.ydbio.2020.09.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Revised: 08/24/2020] [Accepted: 09/10/2020] [Indexed: 12/27/2022]
Abstract
The interplay between signaling molecules and transcription factors during retinal development is key to controlling the correct number of retinal cell types. Zeb2 (Sip1) is a zinc-finger multidomain transcription factor that plays multiple roles in central and peripheral nervous system development. Haploinsufficiency of ZEB2 causes Mowat-Wilson syndrome, a congenital disease characterized by intellectual disability, epilepsy and Hirschsprung disease. In the developing retina, Zeb2 is required for generation of horizontal cells and the correct number of interneurons; however, its potential function in controlling gliogenic versus neurogenic decisions remains unresolved. Here we present cellular and molecular evidence of the inhibition of Müller glia cell fate by Zeb2 in late stages of retinogenesis. Unbiased transcriptomic profiling of control and Zeb2-deficient early-postnatal retina revealed that Zeb2 functions in inhibiting Id1/2/4 and Hes1 gene expression. These neural progenitor factors normally inhibit neural differentiation and promote Müller glia cell fate. Chromatin immunoprecipitation (ChIP) supported direct regulation of Id1 by Zeb2 in the postnatal retina. Reporter assays and ChIP analyses in differentiating neural progenitors provided further evidence that Zeb2 inhibits Id1 through inhibition of Smad-mediated activation of Id1 transcription. Together, the results suggest that Zeb2 promotes the timely differentiation of retinal interneurons at least in part by repressing BMP-Smad/Notch target genes that inhibit neurogenesis. These findings show that Zeb2 integrates extrinsic cues to regulate the balance between neuronal and glial cell types in the developing murine retina.
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Affiliation(s)
- Yotam Menuchin-Lasowski
- Department of Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel
| | - Bar Dagan
- Department of Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel
| | - Andrea Conidi
- Department of Cell Biology, Erasmus University Medical Center, Rotterdam 3015 CN, the Netherlands
| | - Mazal Cohen-Gulkar
- Department of Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel
| | - Ahuvit David
- Department of Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel
| | - Marcelo Ehrlich
- Shumins School of Biomedicine and Cancer Research, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv 69978, Israel
| | - Pazit Oren Giladi
- Department of Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel
| | - Brian S Clark
- John F Hardesty, MD Department of Ophthalmology and Visual Sciences and Department of Developmental Biology, Washington University, St. Louis, MO 63110, USA
| | - Seth Blackshaw
- Solomon H. Snyder Department of Neuroscience, Baltimore, MD 21205, USA; Department of Ophthalmology, Baltimore, MD 21205, USA; Department of Neurology, Baltimore, MD 21205, USA; Center for Human Systems Biology, Baltimore, MD 21205, USA; Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Keren Shapira
- Shumins School of Biomedicine and Cancer Research, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv 69978, Israel; Sagol School of Neuroscience, Tel Aviv University, Tel Aviv 69978, Israel
| | - Danny Huylebroeck
- Department of Cell Biology, Erasmus University Medical Center, Rotterdam 3015 CN, the Netherlands; Department of Development and Regeneration, KU Leuven, Leuven 3000, Belgium
| | - Yoav I Henis
- Shumins School of Biomedicine and Cancer Research, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv 69978, Israel; Sagol School of Neuroscience, Tel Aviv University, Tel Aviv 69978, Israel
| | - Ruth Ashery-Padan
- Department of Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel; Sagol School of Neuroscience, Tel Aviv University, Tel Aviv 69978, Israel.
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8
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Intrinsic Balance between ZEB Family Members Is Important for Melanocyte Homeostasis and Melanoma Progression. Cancers (Basel) 2020; 12:cancers12082248. [PMID: 32796736 PMCID: PMC7465899 DOI: 10.3390/cancers12082248] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 08/06/2020] [Accepted: 08/07/2020] [Indexed: 02/07/2023] Open
Abstract
It has become clear that cellular plasticity is a main driver of cancer therapy resistance. Consequently, there is a need to mechanistically identify the factors driving this process. The transcription factors of the zinc-finger E-box-binding homeobox family, consisting of ZEB1 and ZEB2, are notorious for their roles in epithelial-to-mesenchymal transition (EMT). However, in melanoma, an intrinsic balance between ZEB1 and ZEB2 seems to determine the cellular state by modulating the expression of the master regulator of melanocyte homeostasis, microphthalmia-associated transcription factor (MITF). ZEB2 drives MITF expression and is associated with a differentiated/proliferative melanoma cell state. On the other hand, ZEB1 is correlated with low MITF expression and a more invasive, stem cell-like and therapy-resistant cell state. This intrinsic balance between ZEB1 and ZEB2 could prove to be a promising therapeutic target for melanoma patients. In this review, we will summarise what is known on the functional mechanisms of these transcription factors. Moreover, we will look specifically at their roles during melanocyte-lineage development and homeostasis. Finally, we will overview the current literature on ZEB1 and ZEB2 in the melanoma context and link this to the 'phenotype-switching' model of melanoma cellular plasticity.
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9
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Deryckere A, Stappers E, Dries R, Peyre E, van den Berghe V, Conidi A, Zampeta FI, Francis A, Bresseleers M, Stryjewska A, Vanlaer R, Maas E, Smal IV, van IJcken WFJ, Grosveld FG, Nguyen L, Huylebroeck D, Seuntjens E. Multifaceted actions of Zeb2 in postnatal neurogenesis from the ventricular-subventricular zone to the olfactory bulb. Development 2020; 147:dev184861. [PMID: 32253238 DOI: 10.1242/dev.184861] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Accepted: 03/23/2020] [Indexed: 03/01/2024]
Abstract
The transcription factor Zeb2 controls fate specification and subsequent differentiation and maturation of multiple cell types in various embryonic tissues. It binds many protein partners, including activated Smad proteins and the NuRD co-repressor complex. How Zeb2 subdomains support cell differentiation in various contexts has remained elusive. Here, we studied the role of Zeb2 and its domains in neurogenesis and neural differentiation in the young postnatal ventricular-subventricular zone (V-SVZ), in which neural stem cells generate olfactory bulb-destined interneurons. Conditional Zeb2 knockouts and separate acute loss- and gain-of-function approaches indicated that Zeb2 is essential for controlling apoptosis and neuronal differentiation of V-SVZ progenitors before and after birth, and we identified Sox6 as a potential downstream target gene of Zeb2. Zeb2 genetic inactivation impaired the differentiation potential of the V-SVZ niche in a cell-autonomous fashion. We also provide evidence that its normal function in the V-SVZ also involves non-autonomous mechanisms. Additionally, we demonstrate distinct roles for Zeb2 protein-binding domains, suggesting that Zeb2 partners co-determine neuronal output from the mouse V-SVZ in both quantitative and qualitative ways in early postnatal life.
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Affiliation(s)
- Astrid Deryckere
- Laboratory of Developmental Neurobiology, Department of Biology, KU Leuven, Leuven 3000, Belgium
| | - Elke Stappers
- Laboratory of Molecular Biology (Celgen), Department of Development and Regeneration, KU Leuven, Leuven 3000, Belgium
- Department of Cell Biology, Erasmus University Medical Center, Rotterdam 3015 CN, The Netherlands
| | - Ruben Dries
- Laboratory of Molecular Biology (Celgen), Department of Development and Regeneration, KU Leuven, Leuven 3000, Belgium
- Department of Cell Biology, Erasmus University Medical Center, Rotterdam 3015 CN, The Netherlands
| | - Elise Peyre
- GIGA-Stem Cells and GIGA-Neurosciences, Liège University, Liège 4000, Belgium
| | - Veronique van den Berghe
- Laboratory of Molecular Biology (Celgen), Department of Development and Regeneration, KU Leuven, Leuven 3000, Belgium
- Department of Developmental Neurobiology, Institute of Psychiatry, Psychology and Neuroscience, and MRC Centre for Neurodevelopmental Disorders, King's College London, London SE1 1UL, UK
| | - Andrea Conidi
- Department of Cell Biology, Erasmus University Medical Center, Rotterdam 3015 CN, The Netherlands
| | - F Isabella Zampeta
- Department of Cell Biology, Erasmus University Medical Center, Rotterdam 3015 CN, The Netherlands
| | - Annick Francis
- Laboratory of Molecular Biology (Celgen), Department of Development and Regeneration, KU Leuven, Leuven 3000, Belgium
| | - Marjolein Bresseleers
- Laboratory of Molecular Biology (Celgen), Department of Development and Regeneration, KU Leuven, Leuven 3000, Belgium
| | - Agata Stryjewska
- Laboratory of Molecular Biology (Celgen), Department of Development and Regeneration, KU Leuven, Leuven 3000, Belgium
| | - Ria Vanlaer
- Laboratory of Developmental Neurobiology, Department of Biology, KU Leuven, Leuven 3000, Belgium
| | - Elke Maas
- Department of Cardiovascular Sciences, Center for Molecular and Vascular Biology, KU Leuven, Leuven 3000, Belgium
| | - Ihor V Smal
- Department of Cell Biology, Erasmus University Medical Center, Rotterdam 3015 CN, The Netherlands
- Department of Molecular Genetics, Erasmus University Medical Center, Rotterdam 3015 CN, The Netherlands
| | - Wilfred F J van IJcken
- Department of Cell Biology, Erasmus University Medical Center, Rotterdam 3015 CN, The Netherlands
- Center for Biomics-Genomics, Department of Cell Biology, Erasmus University Medical Center, Rotterdam 3015 CN, The Netherlands
| | - Frank G Grosveld
- Department of Cell Biology, Erasmus University Medical Center, Rotterdam 3015 CN, The Netherlands
| | - Laurent Nguyen
- GIGA-Stem Cells and GIGA-Neurosciences, Liège University, Liège 4000, Belgium
| | - Danny Huylebroeck
- Laboratory of Molecular Biology (Celgen), Department of Development and Regeneration, KU Leuven, Leuven 3000, Belgium
- Department of Cell Biology, Erasmus University Medical Center, Rotterdam 3015 CN, The Netherlands
| | - Eve Seuntjens
- Laboratory of Developmental Neurobiology, Department of Biology, KU Leuven, Leuven 3000, Belgium
- Laboratory of Molecular Biology (Celgen), Department of Development and Regeneration, KU Leuven, Leuven 3000, Belgium
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10
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Bar Yaacov R, Eshel R, Farhi E, Shemuluvich F, Kaplan T, Birnbaum RY. Functional characterization of the ZEB2 regulatory landscape. Hum Mol Genet 2020; 28:1487-1497. [PMID: 30590588 PMCID: PMC6466108 DOI: 10.1093/hmg/ddy440] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Revised: 12/12/2018] [Accepted: 12/14/2018] [Indexed: 01/03/2023] Open
Abstract
Zinc finger E-box–binding homeobox 2 (ZEB2) is a key developmental regulator of the central nervous system (CNS). Although the transcriptional regulation of ZEB2 is essential for CNS development, the elements that regulate ZEB2 expression have yet to be identified. Here, we identified a proximal regulatory region of ZEB2 and characterized transcriptional enhancers during neuronal development. Using chromatin immunoprecipitation sequencing for active (H3K27ac) and repressed (H3K27me3) chromatin regions in human neuronal progenitors, combined with an in vivo zebrafish enhancer assay, we functionally characterized 18 candidate enhancers in the ZEB2 locus. Eight enhancers drove expression patterns that were specific to distinct mid/hindbrain regions (ZEB2#e3 and 5), trigeminal-like ganglia (ZEB2#e6 and 7), notochord (ZEB2#e2, 4 and 12) and whole brain (ZEB2#e14). We further dissected the minimal sequences that drive enhancer-specific activity in the mid/hindbrain and notochord. Using a reporter assay in human cells, we showed an increased activity of the minimal notochord enhancer ZEB2#e2 in response to AP-1 and DLX1/2 expressions, while repressed activity of this enhancer was seen in response to ZEB2 and TFAP2 expressions. We showed that Dlx1 but not Zeb2 and Tfap2 occupies Zeb2#e2 enhancer sequence in the mouse notochord at embryonic day 11.5. Using CRISPR/Cas9 genome editing, we deleted the ZEB2#e2 region, leading to reduction of ZEB2 expression in human cells. We thus characterized distal transcriptional enhancers and trans-acting elements that govern regulation of ZEB2 expression during neuronal development. These findings pave the path toward future analysis of the role of ZEB2 regulatory elements in neurodevelopmental disorders, such as Mowat–Wilson syndrome.
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Affiliation(s)
- Reut Bar Yaacov
- Department of Life Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel.,Center of Evolutionary Genomics and Medicine, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Reut Eshel
- Department of Life Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel.,Center of Evolutionary Genomics and Medicine, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Einan Farhi
- Department of Life Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel.,Center of Evolutionary Genomics and Medicine, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Fania Shemuluvich
- Department of Life Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel.,Center of Evolutionary Genomics and Medicine, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Tommy Kaplan
- School of Computer Science and Engineering, Hebrew University of Jerusalem, Jerusalem, Israel
| | - Ramon Y Birnbaum
- Department of Life Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel.,Center of Evolutionary Genomics and Medicine, Ben-Gurion University of the Negev, Beer-Sheva, Israel
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11
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Bagadia P, Huang X, Liu TT, Murphy KM. Shared Transcriptional Control of Innate Lymphoid Cell and Dendritic Cell Development. Annu Rev Cell Dev Biol 2019; 35:381-406. [PMID: 31283378 PMCID: PMC6886469 DOI: 10.1146/annurev-cellbio-100818-125403] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Innate immunity and adaptive immunity consist of highly specialized immune lineages that depend on transcription factors for both function and development. In this review, we dissect the similarities between two innate lineages, innate lymphoid cells (ILCs) and dendritic cells (DCs), and an adaptive immune lineage, T cells. ILCs, DCs, and T cells make up four functional immune modules and interact in concert to produce a specified immune response. These three immune lineages also share transcriptional networks governing the development of each lineage, and we discuss the similarities between ILCs and DCs in this review.
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Affiliation(s)
- Prachi Bagadia
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, Missouri 63108, USA;
| | - Xiao Huang
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, Missouri 63108, USA;
| | - Tian-Tian Liu
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, Missouri 63108, USA;
| | - Kenneth M Murphy
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, Missouri 63108, USA;
- Howard Hughes Medical Institute, Washington University School of Medicine, St. Louis, Missouri 63108, USA
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12
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Ye Y, Yang J, Hu Q, Mao J, Yang Q, Chen H, Li D, Li P, Duan L, Wang B, Chen J, Chen W. SIP1 serves a role in HBx‑induced liver cancer growth and metastasis. Int J Oncol 2019; 55:1019-1032. [PMID: 31793654 PMCID: PMC6776188 DOI: 10.3892/ijo.2019.4884] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Accepted: 07/30/2019] [Indexed: 12/24/2022] Open
Abstract
Hepatitis B virus (HBV) has been revealed to be involved in the development of hepatocellular carcinoma. However, the mechanism remains to be fully elucidated. Smad‑interacting protein 1 (SIP1) is a transcriptional repressor, which serves a pivotal role in cell metastasis. In the present study, the role of SIP1 in HBx‑induced hepatocyte EMT and cancer aggressiveness was examined. It was found that HBV X protein (HBx) increased the expression of SIP1 and recruited it to the promoter of E‑cadherin, resulting in depression of the transcription of E‑cadherin. Histone deacetylase 1 was also found to be involved in the repressive complex formation. Furthermore, in an orthotopic tumor transplantation model in vivo, HBx promoted tumor growth and metastasis, whereas the knockdown of SIP1 attenuated the effect of HBx. These results indicate a novel mechanism for the development of HBV‑related liver cancer.
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Affiliation(s)
- Yuanyuan Ye
- Department of Laboratory Medicine, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, P.R. China
| | - Jun Yang
- Department of Laboratory Medicine, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, P.R. China
| | - Qin Hu
- Department of Laboratory Medicine, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, P.R. China
| | - Jinju Mao
- Department of Laboratory Medicine, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, P.R. China
| | - Qianfan Yang
- Department of Laboratory Medicine, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, P.R. China
| | - Hong Chen
- Department of Laboratory Medicine, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, P.R. China
| | - Dandan Li
- Department of Laboratory Medicine, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, P.R. China
| | - Pu Li
- Department of Laboratory Medicine, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, P.R. China
| | - Liang Duan
- Department of Laboratory Medicine, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, P.R. China
| | - Bo Wang
- Department of Laboratory Medicine, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, P.R. China
| | - Juan Chen
- Key Laboratory of Molecular Biology of Infectious Diseases Designated by The Chinese Ministry of Education, Chongqing Medical University, Chongqing 400016, P.R. China
| | - Weixian Chen
- Department of Laboratory Medicine, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, P.R. China
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13
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Fardi M, Alivand M, Baradaran B, Farshdousti Hagh M, Solali S. The crucial role of ZEB2: From development to epithelial-to-mesenchymal transition and cancer complexity. J Cell Physiol 2019; 234:14783-14799. [PMID: 30773635 DOI: 10.1002/jcp.28277] [Citation(s) in RCA: 62] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Revised: 01/13/2019] [Accepted: 01/15/2019] [Indexed: 01/24/2023]
Abstract
Zinc finger E-box binding homeobox 2 (ZEB2) is a DNA-binding transcription factor, which is mainly involved in epithelial-to-mesenchymal transition (EMT). EMT is a conserved process during which mature and adherent epithelial-like state is converted into a mobile mesenchymal state. Emerging data indicate that ZEB2 plays a pivotal role in EMT-induced processes such as development, differentiation, and malignant mechanisms, for example, drug resistance, cancer stem cell-like traits, apoptosis, survival, cell cycle arrest, tumor recurrence, and metastasis. In this regard, the understanding of mentioned subjects in the development of normal and cancerous cells could be helpful in cancer complexity of diagnosis and therapy. In this study, we review recent findings about the biological properties of ZEB2 in healthy and cancerous states to find new approaches for cancer treatment.
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Affiliation(s)
- Masoumeh Fardi
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
- Immunology Department, Tabriz University of Medical Sciences, Tabriz, Iran
| | | | - Behzad Baradaran
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
- Immunology Department, Tabriz University of Medical Sciences, Tabriz, Iran
| | | | - Saeed Solali
- Immunology Department, Tabriz University of Medical Sciences, Tabriz, Iran
- Hematology and Oncology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
- Molecular Medicine Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
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14
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Gao Y, Guo X, Li Y, Sha W, She R. The decreased lncRNA ZEB2-AS1 in pre-eclampsia controls the trophoblastic cell line HTR-8/SVneo's invasive and migratory abilities via the miR-149/PGF axis. J Cell Biochem 2019; 120:17677-17686. [PMID: 31148230 DOI: 10.1002/jcb.29034] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2018] [Revised: 04/30/2019] [Accepted: 05/03/2019] [Indexed: 12/21/2022]
Abstract
Pre-eclampsia (PE) is a pregnancy disease that causes maternal death and threatens the health of newborns. Accumulating evidence has revealed the essential roles of long noncoding RNAs (lncRNAs) in the progression of PE. The present investigation determined lncRNA ZEB2 antisense RNA 1 (ZEB2-AS1) expression in PE and looked into the potential role of ZEB2-AS1 in modulating trophoblastic cell functions. Quantitative real-time polymerase chain reaction evaluated gene expression. Western blot analyzed the placental growth factor (PGF) protein level. Cell counting kit-8 and Transwell invasion assays assessed the proliferative and invasive abilities of placental trophoblast cells, respectively. Wound healing assay determined cell migratory potentials. Dual-luciferase reporter assay assessed the targeting relationship among ZEB2-AS1, miR-149, and PGF. Downregulation of lncRNA ZEB2-AS1 was detected in placentas from patients with PE when compared with those from normal pregnancies. Moreover, ZEB2-AS1 upregulation markedly promoted proliferative, migratory, and invasive potentials in HTR-8/SVneo cells, while knockdown of ZEB2-AS1 had the opposite effects. The effects on HTR-8/SVneo cells mediated by ZEB2-AS1 was correlated with the miR-149/PGF axis. These findings indicate that ZEB2-AS1 contributes to PE progression by affecting cell proliferative and invasive capacities via the miR-149/PGF axis in HTR-8/SVneo cells. In sum, we identified that ZEB2-AS1 was a novel aberrantly expressed lncRNA in the placentas of PE patients and lncRNA ZEB2-AS1 modulated trophoblastic cell line HTR-8/SVneo's proliferative and invasive potentials via targeting the miR-149/PGF axis.
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Affiliation(s)
- Yu Gao
- Department of Obstetrics and Gynecology, the Second Clinical Medical College of Jinan University, Shenzhen People's Hospital, Shenzhen, China
| | - Xiaohui Guo
- Department of Obstetrics and Gynecology, the Second Clinical Medical College of Jinan University, Shenzhen People's Hospital, Shenzhen, China
| | - Yan Li
- Department of Obstetrics and Gynecology, the Second Clinical Medical College of Jinan University, Shenzhen People's Hospital, Shenzhen, China
| | - Wenqiong Sha
- Department of Obstetrics and Gynecology, the Second Clinical Medical College of Jinan University, Shenzhen People's Hospital, Shenzhen, China
| | - Ruilian She
- Department of Obstetrics and Gynecology, the Second Clinical Medical College of Jinan University, Shenzhen People's Hospital, Shenzhen, China
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15
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Li C, Xiao XQ, Qian YH, Zhou ZY. The CtBP1-p300-FOXO3a transcriptional complex represses the expression of the apoptotic regulators Bax and Bim in human osteosarcoma cells. J Cell Physiol 2019; 234:22365-22377. [PMID: 31074088 DOI: 10.1002/jcp.28802] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Revised: 04/22/2019] [Accepted: 04/24/2019] [Indexed: 12/12/2022]
Abstract
C-terminal binding protein 1 (CtBP1), a well-known transcriptional corepressor, functions as an oncogene in multiple cancer types, including osteosarcoma, by modulating the transcription of many tumor suppressors, such as cadherin 1 (CDH1), phosphatase and tensin homolog (PTEN), Bcl2-associated X (Bax), Bcl-2-interacting mediator (Bim), and cyclin-dependent kinase inhibitor 1A (CDKN1A). However, it is still unclear how CtBP1 regulates the expression of these downstream targets. Here, we identified that CtBP1 is overexpressed in osteosarcoma cells and found that CtBP1 directly interacts with the transcription factor forkhead box O3 (FOXO3a) and the histone acetyltransferase p300 in vivo and in vitro. Through microarray analysis, we found that CtBP1 negatively regulates FOXO3a levels. In contrast to the CtBP1 level, the FOXO3a expression level was found to be significantly reduced in osteosarcoma cells. Knockdown of CtBP1 or overexpression of FOXO3a in U2OS cells resulted in different gene expression patterns, and the former caused upregulation of CtBP1 downstream target genes such as CDH1, PTEN, Bax, Bim, and CDKN1A, whereas the latter caused upregulation of Bax and Bim, but not CDH1, PTEN, and CDKN1A. Further analysis indicated that the CtBP1-p300-FOXO3a transcriptional complex specifically binds to the promoters of Bax and Bim. Inhibition of CtBP1 by the constitutive expression of Pep1-E1AWT peptide in U2OS and OSA cells reversed oncogenic phenotypes, including colony formation, cellular proliferation, and migration, and limited tumor growth in vivo. Together our results demonstrated that the CtBP1-p300-FOXO3a transcriptional complex represses the expression of the apoptotic regulators Bax and Bim in human osteosarcoma cells and that targeting CtBP1-mediated transcriptional events might be a potential therapeutic strategy for the osteosarcoma treatment.
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Affiliation(s)
- Chen Li
- Department of Orthopaedics, People's Hospital of Jiangxi Province, Nanchang, Jiangxi, China
| | - Xiao-Qing Xiao
- Department of Oncology, People's Hospital of Jiangxi Province, Nanchang, Jiangxi, China
| | - Yi-Hong Qian
- Department of Orthopaedics, People's Hospital of Jiangxi Province, Nanchang, Jiangxi, China
| | - Zhi-Yong Zhou
- Department of Oncology, People's Hospital of Jiangxi Province, Nanchang, Jiangxi, China
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16
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Yalim‐Camci I, Balcik‐Ercin P, Cetin M, Odabas G, Tokay N, Sayan AE, Yagci T. ETS1 is coexpressed with ZEB2 and mediates ZEB2‐induced epithelial‐mesenchymal transition in human tumors. Mol Carcinog 2019; 58:1068-1081. [DOI: 10.1002/mc.22994] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Revised: 02/06/2019] [Accepted: 02/11/2019] [Indexed: 12/22/2022]
Affiliation(s)
- Irem Yalim‐Camci
- Department of Molecular Biology and Genetics, Laboratory of Molecular OncologyGebze Technical UniversityGebze/Kocaeli Turkey
| | - Pelin Balcik‐Ercin
- Department of Molecular Biology and Genetics, Laboratory of Molecular OncologyGebze Technical UniversityGebze/Kocaeli Turkey
| | - Metin Cetin
- Department of Molecular Biology and Genetics, Laboratory of Molecular OncologyGebze Technical UniversityGebze/Kocaeli Turkey
| | - Gorkem Odabas
- Department of Molecular Biology and Genetics, Laboratory of Molecular OncologyGebze Technical UniversityGebze/Kocaeli Turkey
| | - Nurettin Tokay
- Department of Molecular Biology and Genetics, Laboratory of Molecular OncologyGebze Technical UniversityGebze/Kocaeli Turkey
| | - A. Emre Sayan
- Cancer Sciences Unit and Cancer Research UK CentreUniversity of Southampton, Southampton General HospitalSouthampton UK
| | - Tamer Yagci
- Department of Molecular Biology and Genetics, Laboratory of Molecular OncologyGebze Technical UniversityGebze/Kocaeli Turkey
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17
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CtBP promotes metastasis of breast cancer through repressing cholesterol and activating TGF-β signaling. Oncogene 2018; 38:2076-2091. [PMID: 30442980 DOI: 10.1038/s41388-018-0570-z] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Revised: 10/19/2018] [Accepted: 10/26/2018] [Indexed: 02/06/2023]
Abstract
Metastasis is the process through which the primary cancer cells spread beyond the primary tumor and disseminate to other organs. Most cancer patients die of metastatic disease. EMT is proposed to be the initial event associated with cancer metastasis and how it occurred is still a mystery. CtBP is known as a co-repressor abundantly expressed in many types of cancer and regulates genes involved in cancer initiation, progression, and metastasis. We found that CtBP regulates intracellular cholesterol homeostasis in breast cancer cells by forming a complex with ZEB1 and transcriptionally repressing SREBF2 expression. Importantly, CtBP repression of intracellular cholesterol abundance leads to increased EMT and cell migration. The reason is that cholesterol negatively regulates the stability of TGF-β receptors on the cell membrane. Interestingly, TGF-β is also capable of reducing intracellular cholesterol relying on the increased recruitment of ZEB1 and CtBP complex to SREBF2 promoter. Thus, we propose a feedback loop formed by CtBP, cholesterol, and TGF-β signaling pathway, through which TGF-β triggers the cascade that mobilizes the cancer cells for metastasis. Consistently, the intravenous injection of breast cancer cells with ectopically CtBP expression show increased lung metastasis depending on the reduction of intracellular cholesterol. Finally, we analyzed the public breast cancer datasets and found that CtBP expression negatively correlates with SREBF2 and HMGCR expressions. High expression of CtBP and low expression of SREBF2 and HMGCR significantly correlates with high EMT of the primary tumors.
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18
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Nakuluri K, Mukhi D, Nishad R, Saleem MA, Mungamuri SK, Menon RK, Pasupulati AK. Hypoxia induces ZEB2 in podocytes: Implications in the pathogenesis of proteinuria. J Cell Physiol 2018; 234:6503-6518. [DOI: 10.1002/jcp.27387] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Accepted: 08/17/2018] [Indexed: 12/11/2022]
Affiliation(s)
- Krishnamurthy Nakuluri
- Department of Biochemistry School of Life Sciences, University of Hyderabad Hyderabad India
| | - Dhanunjay Mukhi
- Department of Biochemistry School of Life Sciences, University of Hyderabad Hyderabad India
| | - Rajkishor Nishad
- Department of Biochemistry School of Life Sciences, University of Hyderabad Hyderabad India
| | | | - Sathish Kumar Mungamuri
- Institute of Basic Sciences and Translational Research, Asian Health Care Foundation, Asian Institute of Gastroenterology Hyderabad India
| | - Ram K. Menon
- Department of Pediatrics University of Michigan Ann Arbor Michigan
- Department of Molecular and Integrative Physiology University of Michigan Ann Arbor Michigan
| | - Anil Kumar Pasupulati
- Department of Biochemistry School of Life Sciences, University of Hyderabad Hyderabad India
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19
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Balcik-Ercin P, Cetin M, Yalim-Camci I, Odabas G, Tokay N, Sayan AE, Yagci T. Genome-wide analysis of endogenously expressed ZEB2 binding sites reveals inverse correlations between ZEB2 and GalNAc-transferase GALNT3 in human tumors. Cell Oncol (Dordr) 2018; 41:379-393. [PMID: 29516288 DOI: 10.1007/s13402-018-0375-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/22/2018] [Indexed: 10/17/2022] Open
Abstract
BACKGROUND ZEB2 is a transcriptional repressor that regulates epithelial-to-mesenchymal transition (EMT) through binding to bipartite E-box motifs in gene regulatory regions. Despite the abundant presence of E-boxes within the human genome and the multiplicity of pathophysiological processes regulated during ZEB2-induced EMT, only a small fraction of ZEB2 targets has been identified so far. Hence, we explored genome-wide ZEB2 binding by chromatin immunoprecipitation-sequencing (ChIP-seq) under endogenous ZEB2 expression conditions. METHODS For ChIP-Seq we used an anti-ZEB2 monoclonal antibody, clone 6E5, in SNU398 hepatocellular carcinoma cells exhibiting a high endogenous ZEB2 expression. The ChIP-Seq targets were validated using ChIP-qPCR, whereas ZEB2-dependent expression of target genes was assessed by RT-qPCR and Western blotting in shRNA-mediated ZEB2 silenced SNU398 cells and doxycycline-induced ZEB2 overexpressing colorectal carcinoma DLD1 cells. Changes in target gene expression were also assessed using primary human tumor cDNA arrays in conjunction with RT-qPCR. Additional differential expression and correlation analyses were performed using expO and Human Protein Atlas datasets. RESULTS Over 500 ChIP-Seq positive genes were annotated, and intervals related to these genes were found to include the ZEB2 binding motif CACCTG according to TOMTOM motif analysis in the MEME Suite database. Assessment of ZEB2-dependent expression of target genes in ZEB2-silenced SNU398 cells and ZEB2-induced DLD1 cells revealed that the GALNT3 gene serves as a ZEB2 target with the highest, but inversely correlated, expression level. Remarkably, GALNT3 also exhibited the highest enrichment in the ChIP-qPCR validation assays. Through the analyses of primary tumor cDNA arrays and expO datasets a significant differential expression and a significant inverse correlation between ZEB2 and GALNT3 expression were detected in most of the tumors. We also explored ZEB2 and GALNT3 protein expression using the Human Protein Atlas dataset and, again, observed an inverse correlation in all analyzed tumor types, except malignant melanoma. In contrast to a generally negative or weak ZEB2 expression, we found that most tumor tissues exhibited a strong or moderate GALNT3 expression. CONCLUSIONS Our observation that ZEB2 negatively regulates a GalNAc-transferase (GALNT3) that is involved in O-glycosylation adds another layer of complexity to the role of ZEB2 in cancer progression and metastasis. Proteins glycosylated by GALNT3 may be exploited as novel diagnostics and/or therapeutic targets.
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Affiliation(s)
- Pelin Balcik-Ercin
- Department of Molecular Biology and Genetics, Laboratory of Molecular Oncology, Gebze Technical University, C2-Building, 41400, Gebze-Kocaeli, Turkey
| | - Metin Cetin
- Department of Molecular Biology and Genetics, Laboratory of Molecular Oncology, Gebze Technical University, C2-Building, 41400, Gebze-Kocaeli, Turkey
| | - Irem Yalim-Camci
- Department of Molecular Biology and Genetics, Laboratory of Molecular Oncology, Gebze Technical University, C2-Building, 41400, Gebze-Kocaeli, Turkey
| | - Gorkem Odabas
- Department of Molecular Biology and Genetics, Laboratory of Molecular Oncology, Gebze Technical University, C2-Building, 41400, Gebze-Kocaeli, Turkey
| | - Nurettin Tokay
- Department of Molecular Biology and Genetics, Laboratory of Molecular Oncology, Gebze Technical University, C2-Building, 41400, Gebze-Kocaeli, Turkey
| | - A Emre Sayan
- Faculty of Medicine, Cancer Sciences, University of Southampton, Somers Building, Tremona Road, Southampton, SO16 6YD, UK
| | - Tamer Yagci
- Department of Molecular Biology and Genetics, Laboratory of Molecular Oncology, Gebze Technical University, C2-Building, 41400, Gebze-Kocaeli, Turkey.
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20
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Li Y, Zhang J, Zhang W, Liu Y, Li Y, Wang K, Zhang Y, Yang C, Li X, Shi J, Su L, Hu D. MicroRNA-192 regulates hypertrophic scar fibrosis by targeting SIP1. J Mol Histol 2017; 48:357-366. [PMID: 28884252 DOI: 10.1007/s10735-017-9734-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Accepted: 09/04/2017] [Indexed: 02/08/2023]
Abstract
Hypertrophic scar (HS) is a fibro-proliferative disorder which is characterized by excessive deposition of collagen and accumulative activity of myofibroblasts. Increasing evidences have demonstrated miRNAs play a pivotal role in the pathogenesis of HS. MiR-192 is closely associated with renal fibrosis, but its effect on HS formation and skin fibrosis remains unknown. In the study, we presented that miR-192 was up-regulated in HS and HS derived fibroblasts (HSFs) compared to normal skin (NS) and NS derived fibroblasts (NSFs), accompanied by the reduction of smad interacting protein 1 (SIP1) expression and the increase of Col1, Col3 and α-SMA levels. Furthermore, we confirmed SIP1 was a direct target of miR-192 by using luciferase reporter assays. Meanwhile, the overexpression of miR-192 increased the levels of Col1, Col3 and α-SMA. The synthesis of collagen and more positive α-SMA staining were also observed in bleomycin-induced dermal fibrosis model of BALB/c mice treated with subcutaneous miR-192 mimics injection, whereas the inhibition of miR-192 decreased the expression of Col1, Col3 and α-SMA. Moreover, SIP1 siRNA could enhance the levels of Col1, Col3 and α-SMA, showing that the effect of knockdown SIP1 was similar to miR-192 mimics, and the phenomenon manifested miR-192 regulated HS fibrosis by targeting SIP1. Together, our results indicated that miR-192 was a critical factor of HS formation and facilitated skin fibrosis by targeting directly SIP1.
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Affiliation(s)
- Yan Li
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, 127 West Chang-le Road, Xi'an, 710032, China
| | - Julei Zhang
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, 127 West Chang-le Road, Xi'an, 710032, China
| | - Wei Zhang
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, 127 West Chang-le Road, Xi'an, 710032, China
| | - Yang Liu
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, 127 West Chang-le Road, Xi'an, 710032, China
| | - Yuehua Li
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, 127 West Chang-le Road, Xi'an, 710032, China
| | - Kejia Wang
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, 127 West Chang-le Road, Xi'an, 710032, China
| | - Yijie Zhang
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, 127 West Chang-le Road, Xi'an, 710032, China
| | - Chen Yang
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, 127 West Chang-le Road, Xi'an, 710032, China
| | - Xiaoqiang Li
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, 127 West Chang-le Road, Xi'an, 710032, China
| | - Jihong Shi
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, 127 West Chang-le Road, Xi'an, 710032, China
| | - Linlin Su
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, 127 West Chang-le Road, Xi'an, 710032, China
| | - Dahai Hu
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, 127 West Chang-le Road, Xi'an, 710032, China.
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Yao X, Pham T, Temple B, Gray S, Cannon C, Hardy C, Fletcher K, Ireland SK, Hossain A, Chen R, Abdel-Mageed AB, Biliran H. TLE1 inhibits anoikis and promotes tumorigenicity in human lung cancer cells through ZEB1-mediated E-cadherin repression. Oncotarget 2017; 8:72235-72249. [PMID: 29069783 PMCID: PMC5641126 DOI: 10.18632/oncotarget.19703] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Accepted: 06/26/2017] [Indexed: 01/06/2023] Open
Abstract
The Transducin-like enhancer of split 1 (TLE1) corepressor protein is overexpressed in human lung tumors and is a putative lung-specific oncogene. However, the molecular mechanism underlying its oncogenic function remains to be delineated. Here, we report an important role of TLE1 in promoting lung tumorigenesis by a mechanism involving induction of anoikis resistance. Using the human lung adenocarcinoma A549 and immortalized bronchial epithelial BEAS-2B cell lines, we observed that TLE1 inhibits anoikis through transcriptional repression of E-cadherin gene. In support of E-cadherin as a downstream target of TLE1 to block anoikis, forced expression of E-cadherin attenuated TLE1-induced anoikis resistance while E-cadherin downregulation decreased the anoikis sensitivity of TLE1 knockdown cells. Furthermore, we determined that E-cadherin expression is transcriptionally induced upon loss of cell attachment and functions as an effector of anoikis. Loss of E-cadherin via the siRNA strategy or exogenous TLE1 expression was sufficient to attenuate anoikis in A549 and BEAS-2B cells. Importantly, we demonstrated that the ZEB1 transcriptional factor is required for TLE1-mediated E-cadherin repression and anoikis resistance. ZEB1 interacted with and recruited the TLE1 to the E-cadherin promoter to impose histone deacetylation and gene silencing. In vivo, TLE1 strongly promoted tumorigenicity of A549 cells in a ZEB1-dependent manner. Underscoring its role in anoikis insensitivity of lung cancer cells, the TLE1-mediated E-cadherin repression was negatively regulated by the tumor suppressor Bcl-2 inhibitor of transcription 1 (Bit1) to effect anoikis. These findings identify the ZEB1/TLE1/E-cadherin transcriptional mechanism as a novel pathway that promotes anoikis resistance and oncogenicity of lung cancer cells.
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Affiliation(s)
- Xin Yao
- Department of Biological and Public Health Sciences, Xavier University of Louisiana, New Orleans, LA 70125, USA
| | - Tri Pham
- Department of Biological and Public Health Sciences, Xavier University of Louisiana, New Orleans, LA 70125, USA
| | - Brandi Temple
- Department of Biological and Public Health Sciences, Xavier University of Louisiana, New Orleans, LA 70125, USA
| | - Selena Gray
- Department of Biological and Public Health Sciences, Xavier University of Louisiana, New Orleans, LA 70125, USA
| | - Cornita Cannon
- Department of Biological and Public Health Sciences, Xavier University of Louisiana, New Orleans, LA 70125, USA
| | - Camry Hardy
- Department of Biological and Public Health Sciences, Xavier University of Louisiana, New Orleans, LA 70125, USA
| | - Kamari Fletcher
- Department of Biological and Public Health Sciences, Xavier University of Louisiana, New Orleans, LA 70125, USA
| | - Shubha Kale Ireland
- Department of Biological and Public Health Sciences, Xavier University of Louisiana, New Orleans, LA 70125, USA
| | - Ahamed Hossain
- Department of Biological and Public Health Sciences, Xavier University of Louisiana, New Orleans, LA 70125, USA
| | - Renwei Chen
- Center for Bioengineering, University of California, Santa Barbara, CA 93106, USA
| | - Asim B Abdel-Mageed
- Tulane Cancer Center, Tulane University School of Medicine, New Orleans, LA 70112, USA
| | - Hector Biliran
- Department of Biological and Public Health Sciences, Xavier University of Louisiana, New Orleans, LA 70125, USA
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Liao TT, Yang MH. Revisiting epithelial-mesenchymal transition in cancer metastasis: the connection between epithelial plasticity and stemness. Mol Oncol 2017. [PMID: 28649800 PMCID: PMC5496497 DOI: 10.1002/1878-0261.12096] [Citation(s) in RCA: 149] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Epithelial‐mesenchymal transition (EMT) is an important process in embryonic development, fibrosis, and cancer metastasis. During cancer progression, the activation of EMT permits cancer cells to acquire migratory, invasive, and stem‐like properties. A growing body of evidence supports the critical link between EMT and cancer stemness. However, contradictory results have indicated that the inhibition of EMT also promotes cancer stemness, and that mesenchymal‐epithelial transition, the reverse process of EMT, is associated with the tumor‐initiating ability required for metastatic colonization. The concept of ‘intermediate‐state EMT’ provides a possible explanation for this conflicting evidence. In addition, recent studies have indicated that the appearance of ‘hybrid’ epithelial‐mesenchymal cells is favorable for the establishment of metastasis. In summary, dynamic changes or plasticity between the epithelial and the mesenchymal states rather than a fixed phenotype is more likely to occur in tumors in the clinical setting. Further studies aimed at validating and consolidating the concept of intermediate‐state EMT and hybrid tumors are needed for the establishment of a comprehensive profile of cancer metastasis.
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Affiliation(s)
- Tsai-Tsen Liao
- Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Muh-Hwa Yang
- Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan.,Genome Research Center, National Yang-Ming University, Taipei, Taiwan.,Division of Medical Oncology, Department of Oncology, Taipei Veterans General Hospital, Taiwan
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Abstract
Endothelial cells (ECs) are confirmed as important regulators of vascular integrity, particularly in relation to angiogenesis, wound repair post-injury, and during embryogenesis. Futher, miRNAs have been implicated in EC function and proliferation. Moreover, knockdown of these miRNAs resulted in altered expressions of several important regulators of endothelial biology and angiogenesis including vascular endothelial growth factor receptor 2, endothelial nitric oxide synthase and tubule formation capacity. Several miRNAs have been identified to play a role in the regulation of function, proliferation and growth of vascular ECs. These miRNAs may be important therapeutic targets in the treatment of a range of ischemic diseases, as well as in the regulation of angiogenesis during cancer and tumour progression. The present review discuss some of the important miRNAs having confirmed regulatory role in EC in connection espically with cardiovascular disease.
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Affiliation(s)
- Yong Cao
- Department of Cardiology, Xuzhou Hospital of Traditional Chinese Medicine, Xuzhou, Jiangsu 221009, P.R. China
| | - Pei-Ying Zhang
- Department of Cardiology, Xuzhou Central Hospital, The Affiliated Xuzhou Hospital of Medical College of Southeast University, Xuzhou, Jiangsu 221009, P.R. China
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Brinkmann BG, Quintes S. Zeb2: Inhibiting the inhibitors in Schwann cells. NEUROGENESIS 2017; 4:e1271495. [PMID: 28203609 DOI: 10.1080/23262133.2016.1271495] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Revised: 12/02/2016] [Accepted: 12/06/2016] [Indexed: 10/20/2022]
Abstract
Development of Schwann cells is tightly regulated by concerted action of activating and inhibiting factors. Most of the regulatory feedback loops identified to date are transcriptional activators promoting induction of genes coding for integral myelin proteins and lipids. The mechanisms by which inhibitory factors are silenced during Schwann cell maturation are less well understood. We could recently show a pivotal function for the transcription factor zinc finger E-box binding homeobox 2 (Zeb2) during Schwann cell development and myelination as a transcriptional repressor of maturation inhibitors. Zeb2 belongs to a family of highly conserved 2-handed zinc-finger proteins and represses gene transcription by binding to E-box sequences in the regulatory region of target genes. The protein is known to repress E-cadherin during epithelial to mesenchymal transition (EMT) in tumor malignancy and mediates its functions by interacting with multiple co-factors. During nervous system development, Zeb2 is expressed in neural crest cells, the precursors of Schwann cells, the myelinating glial cells of peripheral nerves. Schwann cells lacking Zeb2 fail to fully differentiate and are unable to sort and myelinate peripheral nerve axons. The maturation inhibitors Sox2, Ednrb and Hey2 emerge as targets for Zeb2-mediated transcriptional repression and show persistent aberrant expression in Zeb2-deficient Schwann cells. While dispensible for adult Schwann cells, re-activation of Zeb2 is essential after nerve injury to allow remyelination and functional recovery. In summary, Zeb2 emerges as an "inhibitor of inhibitors," a novel concept in Schwann cell development and nerve repair.
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Affiliation(s)
- Bastian G Brinkmann
- Max Planck Institute of Experimental Medicine, Department of Neurogenetics , Göttingen, Germany
| | - Susanne Quintes
- Max Planck Institute of Experimental Medicine, Department of Neurogenetics, Göttingen, Germany; University Medical Center Göttingen (UMG), Department of Clinical Neurophysiology, Göttingen, Germany
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25
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Oncogenic ZEB2 activation drives sensitivity toward KDM1A inhibition in T-cell acute lymphoblastic leukemia. Blood 2017; 129:981-990. [PMID: 28069602 DOI: 10.1182/blood-2016-06-721191] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2016] [Accepted: 12/22/2016] [Indexed: 01/01/2023] Open
Abstract
Elevated expression of the Zinc finger E-box binding homeobox transcription factor-2 (ZEB2) is correlated with poor prognosis and patient outcome in a variety of human cancer subtypes. Using a conditional gain-of-function mouse model, we recently demonstrated that ZEB2 is an oncogenic driver of immature T-cell acute lymphoblastic leukemia (T-ALL), a heterogenic subgroup of human leukemia characterized by a high incidence of remission failure or hematological relapse after conventional chemotherapy. Here, we identified the lysine-specific demethylase KDM1A as a novel interaction partner of ZEB2 and demonstrated that mouse and human T-ALLs with increased ZEB2 levels critically depend on KDM1A activity for survival. Therefore, targeting the ZEB2 protein complex through direct disruption of the ZEB2-KDM1A interaction or pharmacological inhibition of the KDM1A demethylase activity itself could serve as a novel therapeutic strategy for this aggressive subtype of human leukemia and possibly other ZEB2-driven malignancies.
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Kim CW, Hwang KA, Choi KC. Anti-metastatic potential of resveratrol and its metabolites by the inhibition of epithelial-mesenchymal transition, migration, and invasion of malignant cancer cells. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2016; 23:1787-1796. [PMID: 27912881 DOI: 10.1016/j.phymed.2016.10.016] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Revised: 10/19/2016] [Accepted: 10/26/2016] [Indexed: 05/15/2023]
Abstract
BACKGROUND Increased epithelial-mesenchymal transition (EMT) and cell migration and invasion abilities of cancer cells play important roles in the metastatic process of cancer. Resveratrol is a stilbenoid, a type of natural polyphenol found in the skin of grapes, berries, and peanuts. A number of experiments have examined resveratrol's ability to target diverse pathways associated with carcinogenesis and cancer progression. PURPOSE This article aims to present updated overview of the knowledge that resveratrol and its metabolites or analogs have the potential to inhibit metastasis of cancer via affecting many signaling pathways related with EMT, cancer migration, and invasion in diverse organs of the body. CHAPTERS This article starts with a short introduction describing diverse beneficial effects of resveratrol including cancer prevention and the aim of the present study. To address the effects of resveratrol on cancer metastasis, mechanisms of EMT, migration, invasion, and their relevance with cancer metastasis, anti-metastatic effects of resveratrol through EMT-related signaling pathways and inhibitory effects of resveratrol on migration and invasion are highlighted. In addition, anti-metastatic potential of resveratrol metabolites and analogs is addressed. CONCLUSION Resveratrol was demonstrated to turn back the EMT process induced by diverse signaling pathways in several cellular and animal cancer models. In addition, resveratrol can exert chemopreventive efficacies on migration and invasion of cancer cells by inhibiting the related pathways and target molecules. Although these findings display the anti-metastatic potential of resveratrol, more patient-oriented clinical studies demonstrating the marked efficacies of resveratrol in humans are still needed.
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Affiliation(s)
- Cho-Won Kim
- Laboratory of Biochemistry and Immunology, Veterinary Medical Center and College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk 28644, Republic of Korea
| | - Kyung-A Hwang
- Laboratory of Biochemistry and Immunology, Veterinary Medical Center and College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk 28644, Republic of Korea.
| | - Kyung-Chul Choi
- Laboratory of Biochemistry and Immunology, Veterinary Medical Center and College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk 28644, Republic of Korea.
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Menuchin-Lasowski Y, Oren-Giladi P, Xie Q, Ezra-Elia R, Ofri R, Peled-Hajaj S, Farhy C, Higashi Y, Van de Putte T, Kondoh H, Huylebroeck D, Cvekl A, Ashery-Padan R. Sip1 regulates the generation of the inner nuclear layer retinal cell lineages in mammals. Development 2016; 143:2829-41. [PMID: 27385012 DOI: 10.1242/dev.136101] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Accepted: 06/15/2016] [Indexed: 01/11/2023]
Abstract
The transcription factor Sip1 (Zeb2) plays multiple roles during CNS development from early acquisition of neural fate to cortical neurogenesis and gliogenesis. In humans, SIP1 (ZEB2) haploinsufficiency leads to Mowat-Wilson syndrome, a complex congenital anomaly including intellectual disability, epilepsy and Hirschsprung disease. Here we uncover the role of Sip1 in retinogenesis. Somatic deletion of Sip1 from mouse retinal progenitors primarily affects the generation of inner nuclear layer cell types, resulting in complete loss of horizontal cells and reduced numbers of amacrine and bipolar cells, while the number of Muller glia is increased. Molecular analysis places Sip1 downstream of the eye field transcription factor Pax6 and upstream of Ptf1a in the gene network required for generating the horizontal and amacrine lineages. Intriguingly, characterization of differentiation dynamics reveals that Sip1 has a role in promoting the timely differentiation of retinal interneurons, assuring generation of the proper number of the diverse neuronal and glial cell subtypes that constitute the functional retina in mammals.
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Affiliation(s)
- Yotam Menuchin-Lasowski
- Department of Human Molecular Genetics and Biochemistry, Faculty of Medicine and Sagol School of Neuroscience, Tel-Aviv University, Tel Aviv 69978, Israel
| | - Pazit Oren-Giladi
- Department of Human Molecular Genetics and Biochemistry, Faculty of Medicine and Sagol School of Neuroscience, Tel-Aviv University, Tel Aviv 69978, Israel
| | - Qing Xie
- Department of Ophthalmology & Visual Sciences, Albert Einstein College of Medicine, Bronx, NY 10461, USA
| | - Raaya Ezra-Elia
- Koret School of Veterinary Medicine, Hebrew University of Jerusalem, Rehovot 7610001, Israel
| | - Ron Ofri
- Koret School of Veterinary Medicine, Hebrew University of Jerusalem, Rehovot 7610001, Israel
| | - Shany Peled-Hajaj
- Department of Human Molecular Genetics and Biochemistry, Faculty of Medicine and Sagol School of Neuroscience, Tel-Aviv University, Tel Aviv 69978, Israel
| | - Chen Farhy
- Department of Human Molecular Genetics and Biochemistry, Faculty of Medicine and Sagol School of Neuroscience, Tel-Aviv University, Tel Aviv 69978, Israel
| | - Yujiro Higashi
- Department of Perinatology, Institute for Developmental Research, Aichi Human Service Center, Kasugai, Aichi 480-0392, Japan
| | - Tom Van de Putte
- Department of Development and Regeneration, KU Leuven, Leuven 3000, Belgium
| | - Hisato Kondoh
- Faculty of Life Sciences, Kyoto Sangyo University, Kamigamo Motoyama, Kita-ku, Kyoto 603-8555, Japan
| | - Danny Huylebroeck
- Department of Development and Regeneration, KU Leuven, Leuven 3000, Belgium Department of Cell Biology, Erasmus University Medical Center, 3015 CN Rotterdam, The Netherlands
| | - Ales Cvekl
- Department of Ophthalmology & Visual Sciences, Albert Einstein College of Medicine, Bronx, NY 10461, USA
| | - Ruth Ashery-Padan
- Department of Human Molecular Genetics and Biochemistry, Faculty of Medicine and Sagol School of Neuroscience, Tel-Aviv University, Tel Aviv 69978, Israel
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Hegarty SV, Sullivan AM, O'Keeffe GW. Zeb2: A multifunctional regulator of nervous system development. Prog Neurobiol 2015; 132:81-95. [PMID: 26193487 DOI: 10.1016/j.pneurobio.2015.07.001] [Citation(s) in RCA: 78] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2015] [Revised: 07/14/2015] [Accepted: 07/15/2015] [Indexed: 12/19/2022]
Abstract
Zinc finger E-box binding homeobox (Zeb) 2 is a transcription factor, identified due its ability to bind Smad proteins, and consists of multiple functional domains which interact with a variety of transcriptional co-effectors. The complex nature of the Zeb2, both at its genetic and protein levels, underlie its multifunctional properties, with Zeb2 capable of acting individually or as part of a transcriptional complex to repress, and occasionally activate, target gene expression. This review introduces Zeb2 as an essential regulator of nervous system development. Zeb2 is expressed in the nervous system throughout its development, indicating its importance in neurogenic and gliogenic processes. Indeed, mutation of Zeb2 has dramatic neurological consequences both in animal models, and in humans with Mowat-Wilson syndrome, which results from heterozygous ZEB2 mutations. The mechanisms by which Zeb2 regulates the induction of the neuroectoderm (CNS primordium) and the neural crest (PNS primordium) are reviewed herein. We then describe how Zeb2 acts to direct the formation, delamination, migration and specification of neural crest cells. Zeb2 regulation of the development of a number of cerebral regions, including the neocortex and hippocampus, are then described. The diverse molecular mechanisms mediating Zeb2-directed development of various neuronal and glial populations are reviewed. The role of Zeb2 in spinal cord and enteric nervous system development is outlined, while its essential function in CNS myelination is also described. Finally, this review discusses how the neurodevelopmental defects of Zeb2 mutant mice delineate the developmental dysfunctions underpinning the multiple neurological defects observed in Mowat-Wilson syndrome patients.
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Affiliation(s)
- Shane V Hegarty
- Department of Anatomy & Neuroscience, University College Cork, Cork, Ireland.
| | - Aideen M Sullivan
- Department of Anatomy & Neuroscience, University College Cork, Cork, Ireland
| | - Gerard W O'Keeffe
- Department of Anatomy & Neuroscience, University College Cork, Cork, Ireland
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Yang Z, Sun B, Li Y, Zhao X, Zhao X, Gu Q, An J, Dong X, Liu F, Wang Y. ZEB2 promotes vasculogenic mimicry by TGF-β1 induced epithelial-to-mesenchymal transition in hepatocellular carcinoma. Exp Mol Pathol 2015; 98:352-9. [DOI: 10.1016/j.yexmp.2015.03.030] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Accepted: 03/23/2015] [Indexed: 01/17/2023]
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MCRIP1, an ERK Substrate, Mediates ERK-Induced Gene Silencing during Epithelial-Mesenchymal Transition by Regulating the Co-Repressor CtBP. Mol Cell 2015; 58:35-46. [DOI: 10.1016/j.molcel.2015.01.023] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2013] [Revised: 12/05/2014] [Accepted: 01/14/2015] [Indexed: 12/30/2022]
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Overexpression of E2F1 in human gastric carcinoma is involved in anti-cancer drug resistance. BMC Cancer 2014; 14:904. [PMID: 25466554 PMCID: PMC4258940 DOI: 10.1186/1471-2407-14-904] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2014] [Accepted: 11/27/2014] [Indexed: 12/13/2022] Open
Abstract
Background Routine chemotherapy often cannot achieve good therapeutic effects because of multidrug resistance (MDR). MDR is frequently caused by the elevated expression of the MDR1 gene encoding P-glycoprotein (P-gp). E2F1 is a frequently overexpressed protein in human tumor cells that increases the activity of the MDR1 promoter, resulting in higher P-gp levels. The upregulation of P-gp might contribute to the survival of tumor cells during chemotherapy. E2F1 confers anticancer drug resistance; however, we speculate whether E2F1 affects MDR through other pathways. This study investigated the possible involvement of E2F1 in anticancer drug resistance of gastric carcinoma in vitro and in vivo. Methods A cisplatin-resistant SGC7901/DDP gastric cancer cell line with stable overexpression of E2F1 was established. Protein expression levels of E2F1, MDR1, MRP, TAp73, GAX, ZEB1, and ZEB2 were detected by western blotting. The influence of overexpression of E2F1 on anticancer drug resistance was assessed by measuring IC50 of SGC7901/DDP cells to cisplatin, doxorubicin, and 5-fluorouracil, as well as the rate of doxorubicin efflux, apoptosis, and cell cycle progression detected by flow cytometry. We determined the in vivo effects of E2F1-overexpression on tumor size in nude mice, and apoptotic cells in tumor tissues were detected by deoxynucleotidyl transferase-mediated dUTP-biotin nick end labeling and hematoxylin and eosin staining. Results The SGC7901/DDP gastric cancer cell line stably overexpressing E2F1 exhibited significantly inhibited sensitivity to cisplatin, doxorubicin, and 5-fluorouracil. Flow cytometry confirmed that the percentage of apoptotic cells decreased after E2F1 upregulation, and that upregulation of E2F1 potentiated S phase arrest of the cell cycle. Furthermore, upregulation of E2F1 significantly decreased intracellular accumulation of doxorubicin. Western blot revealed that E2F1 upregulation suppressed expression of GAX, and increased the expression of MDR1, MRP, ZEB1, TAp73, and ZEB2. Conclusions Overexpression of E2F1 promotes the development of MDR in gastric carcinoma, suggesting that E2F1 may represent an efficacious target for gastric cancer therapy.
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Transcription regulation of E-cadherin by zinc finger E-box binding homeobox proteins in solid tumors. BIOMED RESEARCH INTERNATIONAL 2014; 2014:921564. [PMID: 25197668 PMCID: PMC4147210 DOI: 10.1155/2014/921564] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Revised: 07/13/2014] [Accepted: 07/28/2014] [Indexed: 12/19/2022]
Abstract
Downregulation of E-cadherin in solid tumors with regional migration and systematic metastasis is well recognized. In view of its significance in tumorigenesis and solid cancer progression, studies on the regulatory mechanisms are important for the development of target treatment and prediction of clinical behavior for cancer patients. The vertebrate zinc finger E-box binding homeobox (ZEB) protein family comprises 2 major members: ZEB1 and ZEB2. Both contain the motif for specific binding to multiple enhancer boxes (E-boxes) located within the short-range transcription regulatory regions of the E-cadherin gene. Binding of ZEB1 and ZEB2 to the spaced E-cadherin E-boxes has been implicated in the regulation of E-cadherin expression in multiple human cancers. The widespread functions of ZEB proteins in human malignancies indicate their significance. Given the significance of E-cadherin in the solid tumors, a deeper understanding of the functional role of ZEB proteins in solid tumors could provide insights in the design of target therapy against the migratory nature of solid cancers.
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Nishizaki Y, Takagi T, Matsui F, Higashi Y. SIP1 expression patterns in brain investigated by generating a SIP1-EGFP reporter knock-in mouse. Genesis 2013; 52:56-67. [PMID: 24243579 DOI: 10.1002/dvg.22726] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2013] [Revised: 10/23/2013] [Accepted: 11/08/2013] [Indexed: 12/27/2022]
Abstract
A loss of function of SIP1 (Smad interacting protein 1) in the mouse as well as in human of Mowat-Wilson syndrome results in severe and multiple defects in neural tissue development, especially in the brain. However, no detailed expression analysis of SIP1 during brain development has been previously reported. In this study, we describe the generation of an EGFP knock-in reporter mouse for the Sip1 locus and our subsequent analysis of SIP1-EGFP fusion protein expression during brain development. SIP1-EGFP expression was observed in the pyramidal neurons of the hippocampus, the dentate gyrus, and the postmitotic neurons in the cerebral cortex. In layer 5 of the cerebral cortex, SIP1-EGFP expression was complementary to the Ctip2-expressing neurons, most of which are thought to be the cortico-spinal neurons. This suggested that SIP1-EGFP expressing cells might have the specific trajectory targets other than the spinal region. We further observed SIP1-EGFP expression in oligodendrocytes of the corpus callosum and fimbria, Bergmann glial cells of the cerebellum, the olfactory bulb, and in the serotonergic and dopaminergic neurons of the raphe nuclei in the brainstem. These findings may help to clarify the unknown roles of SIP1 in these cells and the pathoetiology of Mowat-Wilson syndrome.
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Affiliation(s)
- Yuriko Nishizaki
- Department of Perinatology, Institute for Developmental Research, Aichi Human Service Center, Kasugai, Aichi, Japan
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Conidi A, van den Berghe V, Leslie K, Stryjewska A, Xue H, Chen YG, Seuntjens E, Huylebroeck D. Four amino acids within a tandem QxVx repeat in a predicted extended α-helix of the Smad-binding domain of Sip1 are necessary for binding to activated Smad proteins. PLoS One 2013; 8:e76733. [PMID: 24146916 PMCID: PMC3795639 DOI: 10.1371/journal.pone.0076733] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2013] [Accepted: 08/28/2013] [Indexed: 12/20/2022] Open
Abstract
The zinc finger transcription factor Smad-interacting protein-1 (Sip1; Zeb2, Zfhx1b) plays an important role during vertebrate embryogenesis in various tissues and differentiating cell types, and during tumorigenesis. Previous biochemical analysis suggests that interactions with several partner proteins, including TGFβ family receptor-activated Smads, regulate the activities of Sip1 in the nucleus both as a DNA-binding transcriptional repressor and activator. Using a peptide aptamer approach we mapped in Sip1 its Smad-binding domain (SBD), initially defined as a segment of 51 amino acids, to a shorter stretch of 14 amino acids within this SBD. Modelling suggests that this short SBD stretch is part of an extended α-helix that may fit the binding to a hydrophobic corridor within the MH2 domain of activated Smads. Four amino acids (two polar Q residues and two non-polar V residues) that form the tandem repeat (QxVx)2 in this 14-residue stretch were found to be crucial for binding to both TGFβ/Nodal/Activin-Smads and BMP-Smads. A full-length Sip1 with collective mutation of these Q and V residues (to A) no longer binds to Smads, while it retains its binding activity to its cognate bipartite target DNA sequence. This missense mutant Sip1(AxAx)2 provides a new molecular tool to identify SBD (in)dependent target genes in Sip1-controlled TGFβ and/or BMP (de)regulated cellular, developmental and pathological processes.
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Affiliation(s)
- Andrea Conidi
- Laboratory of Molecular Biology (Celgen), Department of Development and Regeneration, Katholieke Universiteit Leuven, Leuven, Belgium
- Department of Cell Biology, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - Veronique van den Berghe
- Laboratory of Molecular Biology (Celgen), Department of Development and Regeneration, Katholieke Universiteit Leuven, Leuven, Belgium
| | - Kris Leslie
- Department of Cell Biology, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - Agata Stryjewska
- Laboratory of Molecular Biology (Celgen), Department of Development and Regeneration, Katholieke Universiteit Leuven, Leuven, Belgium
| | - Hua Xue
- The State Key Laboratory of Biomembrane and Membrane Biotechnology, Tsinghua-Beijing Centre for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, China
| | - Ye-Guang Chen
- The State Key Laboratory of Biomembrane and Membrane Biotechnology, Tsinghua-Beijing Centre for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, China
| | - Eve Seuntjens
- Laboratory of Molecular Biology (Celgen), Department of Development and Regeneration, Katholieke Universiteit Leuven, Leuven, Belgium
| | - Danny Huylebroeck
- Laboratory of Molecular Biology (Celgen), Department of Development and Regeneration, Katholieke Universiteit Leuven, Leuven, Belgium
- Department of Cell Biology, Erasmus University Medical Center, Rotterdam, The Netherlands
- * E-mail:
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Scott E, Loya K, Mountford J, Milligan G, Baker AH. MicroRNA regulation of endothelial homeostasis and commitment-implications for vascular regeneration strategies using stem cell therapies. Free Radic Biol Med 2013; 64:52-60. [PMID: 23665307 DOI: 10.1016/j.freeradbiomed.2013.04.037] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2012] [Revised: 04/22/2013] [Accepted: 04/30/2013] [Indexed: 11/23/2022]
Abstract
Human embryonic (hESC) and induced pluripotent (hiPSC) stem cells have broad therapeutic potential in the treatment of a range of diseases, including those of the vascular system. Both hESCs and hiPSCs have the capacity for indefinite self-renewal, in addition to their ability to differentiate into any adult cell type. These cells could provide a potentially unlimited source of cells for transplantation and, therefore, provide novel treatments, e.g. in the production of endothelial cells for vascular regeneration. MicroRNAs are short, noncoding RNAs that act posttranscriptionally to control gene expression and thereby exert influence over a wide range of cellular processes, including maintenance of pluripotency and differentiation. Expression patterns of these small RNAs are tissue specific, and changes in microRNA levels have often been associated with disease states in humans, including vascular pathologies. Here, we review the roles of microRNAs in endothelial cell function and vascular disease, as well as their role in the differentiation of pluripotent stem cells to the vascular endothelial lineage. Furthermore, we discuss the therapeutic potential of stem cells and how knowledge and manipulation of microRNAs in stem cells may enhance their capacity for vascular regeneration.
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Affiliation(s)
- Elizabeth Scott
- Institute of Cardiovascular and Medical Sciences, British Heart Foundation Glasgow Cardiovascular Research Centre, University of Glasgow, Glasgow G12 8TA, UK
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Fang Y, Wei J, Cao J, Zhao H, Liao B, Qiu S, Wang D, Luo J, Chen W. Protein expression of ZEB2 in renal cell carcinoma and its prognostic significance in patient survival. PLoS One 2013; 8:e62558. [PMID: 23658743 PMCID: PMC3642198 DOI: 10.1371/journal.pone.0062558] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2012] [Accepted: 03/23/2013] [Indexed: 11/19/2022] Open
Abstract
Background ZEB2 has been reportedly shown to mediate the epithelial-to-mesenchymal transition (EMT) and disease aggressiveness in human tumors. However, the expression status of ZEB2 in renal cell carcinoma (RCC) and ZEB2’s clinicopathologic/prognostic significance are poorly understood. Methodology/Principal Findings In this study, tissue microarray, immunohistochemistry (IHC) and western blot analyses were utilized to investigate the ZEB2 expression status in RCC and adjacent renal tissue samples. In our study, samples from 116 RCC patients treated with radical nephrectomy were used as a training set to generate a ZEB2 optimal cut-point for patient outcome by receiver operating characteristic (ROC) analysis. For validation, the correlation of ZEB2 expression with the clinical characteristics and patient outcomes in another set (including 113 patients) was analyzed to validate the obtained cut-point. In the training and validation sets, high expression of ZEB2, defined by ROC analysis, predicted a poorer overall survival and progression-free survival, as evidenced by the univariate and multivariate analyses. In different subsets of overall patients, ZEB2 expression was also a prognostic indicator in patients with stage I/II, stage III/IV, grade 1/2 and grade 3/4 disease (P<0.05). Downregulation of ZEB2 by shRNA decreased the migration and invasion ability of 769-P cells in vitro. Furthermore, high ZEB2 expression was positively correlated with vimentin expression and inversely linked to E-cadherin expression in RCC. Conclusions/Significance Our findings provide a basis for the concept that high ZEB2 expression in RCC may be important in the acquisition of an aggressive phenotype. This evidence suggests that ZEB2 overexpression (examined by IHC) is an independent biomarker for the poor prognosis of patients with RCC.
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Affiliation(s)
- Yong Fang
- Department of Urology, First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Jinhuan Wei
- Department of Urology, First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Jiazheng Cao
- Department of Urology, Affiliated Jiangmen Hospital, Sun Yat-Sen University, Jiangmen, China
| | - Hongwei Zhao
- Department of Urology, Affiliated Yantai Yuhuangding Hospital, Qingdao University Medical College, Yantai, China
| | - Bing Liao
- Department of Pathology, First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Shaopeng Qiu
- Department of Urology, First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Daohu Wang
- Department of Urology, First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Junhang Luo
- Department of Urology, First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
- * E-mail: (JL) (JL); (WC) (WC)
| | - Wei Chen
- Department of Urology, First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
- * E-mail: (JL) (JL); (WC) (WC)
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McKinsey GL, Lindtner S, Trzcinski B, Visel A, Pennacchio LA, Huylebroeck D, Higashi Y, Rubenstein JLR. Dlx1&2-dependent expression of Zfhx1b (Sip1, Zeb2) regulates the fate switch between cortical and striatal interneurons. Neuron 2013; 77:83-98. [PMID: 23312518 DOI: 10.1016/j.neuron.2012.11.035] [Citation(s) in RCA: 109] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/28/2012] [Indexed: 02/05/2023]
Abstract
Mammalian pallial (cortical and hippocampal) and striatal interneurons are both generated in the embryonic subpallium, including the medial ganglionic eminence (MGE). Herein we demonstrate that the Zfhx1b (Sip1, Zeb2) zinc finger homeobox gene is required in the MGE, directly downstream of Dlx1&2, to generate cortical interneurons that express Cxcr7, MafB, and cMaf. In its absence, Nkx2-1 expression is not repressed, and cells that ordinarily would become cortical interneurons appear to transform toward a subtype of GABAergic striatal interneurons. These results show that Zfhx1b is required to generate cortical interneurons, and suggest a mechanism for the epilepsy observed in humans with Zfhx1b mutations (Mowat-Wilson syndrome).
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Affiliation(s)
- Gabriel L McKinsey
- Department of Psychiatry, Neuroscience Program, and the Nina Ireland Laboratory of Developmental Neurobiology, University of California, San Francisco (UCSF), San Francisco, CA 94158-2324, USA
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van den Berghe V, Stappers E, Vandesande B, Dimidschstein J, Kroes R, Francis A, Conidi A, Lesage F, Dries R, Cazzola S, Berx G, Kessaris N, Vanderhaeghen P, van Ijcken W, Grosveld FG, Goossens S, Haigh JJ, Fishell G, Goffinet A, Aerts S, Huylebroeck D, Seuntjens E. Directed migration of cortical interneurons depends on the cell-autonomous action of Sip1. Neuron 2013; 77:70-82. [PMID: 23312517 DOI: 10.1016/j.neuron.2012.11.009] [Citation(s) in RCA: 96] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/04/2012] [Indexed: 12/23/2022]
Abstract
GABAergic interneurons mainly originate in the medial ganglionic eminence (MGE) of the embryonic ventral telencephalon (VT) and migrate tangentially to the cortex, guided by membrane-bound and secreted factors. We found that Sip1 (Zfhx1b, Zeb2), a transcription factor enriched in migrating cortical interneurons, is required for their proper differentiation and correct guidance. The majority of Sip1 knockout interneurons fail to migrate to the neocortex and stall in the VT. RNA sequencing reveals that Sip1 knockout interneurons do not acquire a fully mature cortical interneuron identity and contain increased levels of the repulsive receptor Unc5b. Focal electroporation of Unc5b-encoding vectors in the MGE of wild-type brain slices disturbs migration to the neocortex, whereas reducing Unc5b levels in Sip1 knockout slices and brains rescues the migration defect. Our results reveal that Sip1, through tuning of Unc5b levels, is essential for cortical interneuron guidance.
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Affiliation(s)
- Veronique van den Berghe
- Laboratory of Molecular Biology (Celgen), Department of Development and Regeneration, University of Leuven, 3000 Leuven, Belgium
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Koopmansch B, Berx G, Foidart JM, Gilles C, Winkler R. Interplay between KLF4 and ZEB2/SIP1 in the regulation of E-cadherin expression. Biochem Biophys Res Commun 2013; 431:652-7. [DOI: 10.1016/j.bbrc.2013.01.070] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Accepted: 01/19/2013] [Indexed: 11/26/2022]
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Sánchez-Tilló E, Liu Y, de Barrios O, Siles L, Fanlo L, Cuatrecasas M, Darling DS, Dean DC, Castells A, Postigo A. EMT-activating transcription factors in cancer: beyond EMT and tumor invasiveness. Cell Mol Life Sci 2012; 69:3429-56. [PMID: 22945800 PMCID: PMC11115078 DOI: 10.1007/s00018-012-1122-2] [Citation(s) in RCA: 385] [Impact Index Per Article: 32.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2012] [Revised: 07/20/2012] [Accepted: 08/09/2012] [Indexed: 12/13/2022]
Abstract
Cancer is a complex multistep process involving genetic and epigenetic changes that eventually result in the activation of oncogenic pathways and/or inactivation of tumor suppressor signals. During cancer progression, cancer cells acquire a number of hallmarks that promote tumor growth and invasion. A crucial mechanism by which carcinoma cells enhance their invasive capacity is the dissolution of intercellular adhesions and the acquisition of a more motile mesenchymal phenotype as part of an epithelial-to-mesenchymal transition (EMT). Although many transcription factors can trigger it, the full molecular reprogramming occurring during an EMT is mainly orchestrated by three major groups of transcription factors: the ZEB, Snail and Twist families. Upregulated expression of these EMT-activating transcription factors (EMT-ATFs) promotes tumor invasiveness in cell lines and xenograft mice models and has been associated with poor clinical prognosis in human cancers. Evidence accumulated in the last few years indicates that EMT-ATFs also regulate an expanding set of cancer cell capabilities beyond tumor invasion. Thus, EMT-ATFs have been shown to cooperate in oncogenic transformation, regulate cancer cell stemness, override safeguard programs against cancer like apoptosis and senescence, determine resistance to chemotherapy and promote tumor angiogenesis. This article reviews the expanding portfolio of functions played by EMT-ATFs in cancer progression.
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Affiliation(s)
- Ester Sánchez-Tilló
- Group of Transcriptional Regulation of Gene Expression, Department of Oncology and Hematology, IDIBAPS, 08036 Barcelona, Spain
- CIBERehd (Gastrointestinal and Pancreatic Oncology), IDIBAPS, 08036 Barcelona, Spain
| | - Yongqing Liu
- James Graham Brown Cancer Center, Louisville Health Science Center, Louisville, KY 40202 USA
- Department of Ophthalmology and Birth Defects Center, Louisville Health Science Center, Louisville, KY 40202 USA
| | - Oriol de Barrios
- Group of Transcriptional Regulation of Gene Expression, Department of Oncology and Hematology, IDIBAPS, 08036 Barcelona, Spain
| | - Laura Siles
- Group of Transcriptional Regulation of Gene Expression, Department of Oncology and Hematology, IDIBAPS, 08036 Barcelona, Spain
| | - Lucia Fanlo
- Group of Transcriptional Regulation of Gene Expression, Department of Oncology and Hematology, IDIBAPS, 08036 Barcelona, Spain
- Master Program in Biomedical Research, University Pompeu Fabra, 08003 Barcelona, Spain
| | - Miriam Cuatrecasas
- Department of Pathology, Hospital Clinic and IDIBAPS’ Tumor Bank, 08036 Barcelona, Spain
| | - Douglas S. Darling
- Department of Oral Health and Rehabilitation, Center for Genetics and Molecular Medicine, University of Louisville, Louisville, KY 40202 USA
| | - Douglas C. Dean
- James Graham Brown Cancer Center, Louisville Health Science Center, Louisville, KY 40202 USA
- Department of Ophthalmology and Birth Defects Center, Louisville Health Science Center, Louisville, KY 40202 USA
| | - Antoni Castells
- CIBERehd (Gastrointestinal and Pancreatic Oncology), IDIBAPS, 08036 Barcelona, Spain
- Institute of Digestive and Metabolic Diseases, Hospital Clinic, 08036 Barcelona, Spain
| | - Antonio Postigo
- Group of Transcriptional Regulation of Gene Expression, Department of Oncology and Hematology, IDIBAPS, 08036 Barcelona, Spain
- CIBERehd (Gastrointestinal and Pancreatic Oncology), IDIBAPS, 08036 Barcelona, Spain
- James Graham Brown Cancer Center, Louisville Health Science Center, Louisville, KY 40202 USA
- ICREA, 08010 Barcelona, Spain
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Gheldof A, Hulpiau P, van Roy F, De Craene B, Berx G. Evolutionary functional analysis and molecular regulation of the ZEB transcription factors. Cell Mol Life Sci 2012; 69:2527-41. [PMID: 22349261 PMCID: PMC11115101 DOI: 10.1007/s00018-012-0935-3] [Citation(s) in RCA: 122] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2011] [Revised: 01/23/2012] [Accepted: 01/26/2012] [Indexed: 02/07/2023]
Abstract
ZEB1 and ZEB2, which are members of the ZEB family of transcription factors, play a pivotal role in the development of the vertebrate embryo. However, recent evidence shows that both proteins can also drive the process of epithelial-mesenchymal transition during malignant cancer progression. The understanding of how both ZEBs act as transcription factors opens up new possibilities for future treatment of advanced carcinomas. This review gives insight into the molecular mechanisms that form the basis of the multitude of cellular processes controlled by both ZEB factors. By using an evolutionary approach, we analyzed how the specific organization of the different domains and regulatory sites in ZEB1 and ZEB2 came into existence. On the basis of this analysis, a detailed overview is provided of the different cofactors and post-translational mechanisms that are associated with ZEB protein functionality.
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Affiliation(s)
- Alexander Gheldof
- Unit of Molecular and Cellular Oncology, Department for Molecular Biomedical Research, VIB, Technologiepark 927, 9052 Ghent, Belgium
- Department of Biomedical Molecular Biology, Ghent University, 9052 Ghent, Belgium
| | - Paco Hulpiau
- Department of Biomedical Molecular Biology, Ghent University, 9052 Ghent, Belgium
| | - Frans van Roy
- Department of Biomedical Molecular Biology, Ghent University, 9052 Ghent, Belgium
- Molecular Cell Biology Unit, Department for Molecular Biomedical Research, VIB, 9052 Ghent, Belgium
| | - Bram De Craene
- Unit of Molecular and Cellular Oncology, Department for Molecular Biomedical Research, VIB, Technologiepark 927, 9052 Ghent, Belgium
- Department of Biomedical Molecular Biology, Ghent University, 9052 Ghent, Belgium
| | - Geert Berx
- Unit of Molecular and Cellular Oncology, Department for Molecular Biomedical Research, VIB, Technologiepark 927, 9052 Ghent, Belgium
- Department of Biomedical Molecular Biology, Ghent University, 9052 Ghent, Belgium
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Wang Y, Shang Y. Epigenetic control of epithelial-to-mesenchymal transition and cancer metastasis. Exp Cell Res 2012; 319:160-9. [PMID: 22935683 DOI: 10.1016/j.yexcr.2012.07.019] [Citation(s) in RCA: 96] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2012] [Revised: 07/23/2012] [Accepted: 07/25/2012] [Indexed: 12/22/2022]
Abstract
Epithelial-mesenchymal transition (EMT) is vital for morphogenesis during embryonic development and is also critical for the conversion of early stage tumors into invasive malignancies. Several key inducers of EMT are transcription factors that repress the expression of E-cadherin, whose loss is a hallmark of EMT. Epigenetic regulation encompasses three types of changes: DNA methylation, histone modifications, and microRNAs, each of which has been shown to play a key role in controlling epithelial-mesenchymal transition and cancer metastasis. As we gain deeper understanding of epigenetic mechanisms controlling EMT processes and orchestrating all the metastatic steps, we broaden the therapeutic potentials of epigenetic drugs, such as DNA demethylating drugs and histone deacetylase/demethylase inhibitors, which can act upon metastasis-related genes, restoring their expression and biological functions.
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Affiliation(s)
- Yan Wang
- Tianjin Key Laboratory of Medical Epigenetics, Department of Biochemistry and Molecular Biology, Tianjin Medical University, 22 Qixiangtai Road, Tianjin 300070, China
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Conidi A, Cazzola S, Beets K, Coddens K, Collart C, Cornelis F, Cox L, Joke D, Dobreva MP, Dries R, Esguerra C, Francis A, Ibrahimi A, Kroes R, Lesage F, Maas E, Moya I, Pereira PNG, Stappers E, Stryjewska A, van den Berghe V, Vermeire L, Verstappen G, Seuntjens E, Umans L, Zwijsen A, Huylebroeck D. Few Smad proteins and many Smad-interacting proteins yield multiple functions and action modes in TGFβ/BMP signaling in vivo. Cytokine Growth Factor Rev 2011; 22:287-300. [PMID: 22119658 DOI: 10.1016/j.cytogfr.2011.11.006] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Signaling by the many ligands of the TGFβ family strongly converges towards only five receptor-activated, intracellular Smad proteins, which fall into two classes i.e. Smad2/3 and Smad1/5/8, respectively. These Smads bind to a surprisingly high number of Smad-interacting proteins (SIPs), many of which are transcription factors (TFs) that co-operate in Smad-controlled target gene transcription in a cell type and context specific manner. A combination of functional analyses in vivo as well as in cell cultures and biochemical studies has revealed the enormous versatility of the Smad proteins. Smads and their SIPs regulate diverse molecular and cellular processes and are also directly relevant to development and disease. In this survey, we selected appropriate examples on the BMP-Smads, with emphasis on Smad1 and Smad5, and on a number of SIPs, i.e. the CPSF subunit Smicl, Ttrap (Tdp2) and Sip1 (Zeb2, Zfhx1b) from our own research carried out in three different vertebrate models.
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Affiliation(s)
- Andrea Conidi
- Laboratory of Molecular Biology (Celgen) of Center for Human Genetics, University of Leuven, Campus Gasthuisberg, Herestraat 49, B-3000 Leuven, Belgium.
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Transcription factor Dlx2 protects from TGFβ-induced cell-cycle arrest and apoptosis. EMBO J 2011; 30:4489-99. [PMID: 21897365 DOI: 10.1038/emboj.2011.319] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2011] [Accepted: 08/08/2011] [Indexed: 12/14/2022] Open
Abstract
Acquiring resistance against transforming growth factor β (TGFβ)-induced growth inhibition at early stages of carcinogenesis and shifting to TGFβ's tumour-promoting functions at later stages is a pre-requisite for malignant tumour progression and metastasis. We have identified the transcription factor distal-less homeobox 2 (Dlx2) to exert critical functions during this switch. Dlx2 counteracts TGFβ-induced cell-cycle arrest and apoptosis in mammary epithelial cells by at least two molecular mechanisms: Dlx2 acts as a direct transcriptional repressor of TGFβ receptor II (TGFβRII) gene expression and reduces canonical, Smad-dependent TGFβ signalling and expression of the cell-cycle inhibitor p21(CIP1) and increases expression of the mitogenic transcription factor c-Myc. On the other hand, Dlx2 directly induces the expression of the epidermal growth factor (EGF) family member betacellulin, which promotes cell survival by stimulating EGF receptor signalling. Finally, Dlx2 expression supports experimental tumour growth and metastasis of B16 melanoma cells and correlates with tumour malignancy in a variety of human cancer types. These results establish Dlx2 as one critical player in shifting TGFβ from its tumour suppressive to its tumour-promoting functions.
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Yaguchi S, Yaguchi J, Wei Z, Jin Y, Angerer LM, Inaba K. Fez function is required to maintain the size of the animal plate in the sea urchin embryo. Development 2011; 138:4233-43. [PMID: 21852402 DOI: 10.1242/dev.069856] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Partitioning ectoderm precisely into neurogenic and non-neurogenic regions is an essential step for neurogenesis of almost all bilaterian embryos. Although it is widely accepted that antagonism between BMP and its inhibitors primarily sets up the border between these two types of ectoderm, it is unclear how such extracellular, diffusible molecules create a sharp and precise border at the single-cell level. Here, we show that Fez, a zinc finger protein, functions as an intracellular factor attenuating BMP signaling specifically within the neurogenic region at the anterior end of sea urchin embryos, termed the animal plate. When Fez function is blocked, the size of this neurogenic ectoderm becomes smaller than normal. However, this reduction is rescued in Fez morphants simply by blocking BMP2/4 translation, indicating that Fez maintains the size of the animal plate by attenuating BMP2/4 function. Consistent with this, the gradient of BMP activity along the aboral side of the animal plate, as measured by pSmad1/5/8 levels, drops significantly in cells expressing Fez and this steep decline requires Fez function. Our data reveal that this neurogenic ectoderm produces an intrinsic system that attenuates BMP signaling to ensure the establishment of a stable, well-defined neural territory, the animal plate.
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Affiliation(s)
- Shunsuke Yaguchi
- Shimoda Marine Research Center, University of Tsukuba, 5-10-1 Shimoda, Shizuoka 415-0025, Japan.
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Subramaniam MM, Navarro S, Llombart-Bosch A. Immunohistochemical Study of Correlation Between Histologic Subtype and Expression of Epithelial-Mesenchymal Transition-Related Proteins in Synovial Sarcomas. Arch Pathol Lab Med 2011; 135:1001-9. [DOI: 10.5858/2010-0071-oar1] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Context.—Synovial sarcomas are mesenchymal tumors with epithelial nature and comprise biphasic and monophasic fibrous subtypes. However, factors determining epithelial or spindle cell differentiation are still unexplored. Aberrant epithelial-mesenchymal transition has been implicated in the pathogenesis of diverse human malignancies.
Objective.—To analyze the correlation between cellular phenotype and expression of proteins associated with different epithelial-mesenchymal transition-related pathways.
Design.—Immunohistochemical analysis of E-cadherin, Snail, Slug, and dysadherin, components of the Wnt/wingless and PI3K/Akt pathways, was performed on 14 biphasic and 27 monophasic fibrous tumors.
Results.—In monophasic fibrous tumors, increased expression of Snail (17 of 27; 63%), Slug (18 of 27; 67%), and dysadherin (14 of 27; 52%) and activation of Wnt (nucleocytoplasmic β-catenin accumulation in 63%; n = 27; and positive expression of GSK3 and pGSK3 in 24 of 27 [89%] and 21 of 27 [78%], respectively) and PI3K/Akt (Akt: 22 of 27 [81%]; pAkt: 25 of 27 [93%]; and PI3K: 20 of 27 [74%]) signaling correlated significantly with inactivated E-cadherin expression (1 of 27; 4%) (all P < .05). In contrast, preserved E-cadherin expression (12 of 14; 86%) in the glandular component of the biphasic subtype was associated with significantly decreased Snail (3 of 14; 21%) (P = .02) and dysadherin (2 of 14; 14%) expression (P < .001).
Conclusions.—Overexpression of Snail, Slug, and dysadherin and activation of Wnt and PI3K/Akt signaling was associated with inactivated E-cadherin in the spindle cells of monophasic fibrous synovial sarcomas, further supporting the hypothesis that this subtype may have developed through neoplastic epithelial-mesenchymal transition.
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Acun T, Oztas E, Yagci T, Yakicier MC. SIP1 is downregulated in hepatocellular carcinoma by promoter hypermethylation. BMC Cancer 2011; 11:223. [PMID: 21645397 PMCID: PMC3118200 DOI: 10.1186/1471-2407-11-223] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2010] [Accepted: 06/06/2011] [Indexed: 12/29/2022] Open
Abstract
Background Smad interacting protein-1 is a transcription factor that is implicated in transforming growth factor-β/bone morphogenetic protein signaling and a repressor of E-cadherin and human telomerase reverse transcriptase. It is also involved in epithelial-mesenchymal transition and tumorigenesis. However, genetic and epigenetic alterations of SIP1 have not been fully elucidated in cancers. In this study, we investigated mutations and promoter hypermethylation of the SIP1 gene in human hepatocellular carcinomas. Methods SIP1 expression was analyzed in HCC cell lines and primary tumors in comparison to normal and non-tumor liver tissues by using semi-quantitative RT-PCR, quantitative real-time RT-PCR and immunohistochemistry. Mutation and deletion screening of the SIP1 gene were performed by direct sequencing in HCC-derived cells. Restoration of SIP1 expression was sought by treating HCC cell lines with the DNA methyl transferase inhibitor, 5-AzaC, and the histone deacetylase inhibitor, TSA. SIP1 promoter methylation was analyzed by the combined bisulfite restriction analysis assay in in silico-predicted putative promoter and CpG island regions. Results We found that the expression of SIP1 was completely lost or reduced in five of 14 (36%) HCC cell lines and 17 of 23 (74%) primary HCC tumors. Immunohistochemical analysis confirmed that SIP1 mRNA downregulation was associated with decreased expression of the SIP1 protein in HCC tissues (82.8%). No somatic mutation was observed in SIP1 exons in any of the 14 HCC cell lines. Combined treatment with DNA methyl transferase and histone deacetylase inhibitors synergistically restored SIP1 expression in SIP1-negative cell lines. Analysis of three putative gene regulatory regions revealed tumor-specific methylation in more than half of the HCC cases. Conclusions Epigenetic mechanisms contribute significantly to the downregulation of SIP1 expression in HCC. This finding adds a new level of complexity to the role of SIP1 in hepatocarcinogenesis.
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Affiliation(s)
- Tolga Acun
- Bilkent University, Department of Molecular Biology and Genetics, Ankara, Turkey
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48
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Zhang ZF, Zhang YG, Hu DH, Shi JH, Liu JQ, Zhao ZT, Wang HT, Bai XZ, Cai WX, Zhu HY, Tang CW. Smad interacting protein 1 as a regulator of skin fibrosis in pathological scars. Burns 2011; 37:665-72. [PMID: 21236582 DOI: 10.1016/j.burns.2010.12.001] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2010] [Revised: 11/20/2010] [Accepted: 12/05/2010] [Indexed: 01/07/2023]
Abstract
Keloids and hypertrophic scars are significant symptomatic clinical problems characterized by the excessive and abnormal deposition of collagen-based extracellular matrix (ECM) components. However, the molecular basis of keloid and hypertrophic scar formation has not been fully elucidated. Here, we demonstrated that down-regulation of the transcription factor Smad interacting protein 1 (SIP1) could be relevant to keloid and hypertrophic scar formation. The results of the present study show that the level of SIP1 mRNA is significantly decreased in pathological scar tissues and in normal skin and pathological scar fibroblasts treated with transforming growth factor β1 (TGF-β1). In contrast, the expression of SIP1 mRNA is not decreased in normotrophic scar samples. The SIP1 mRNA level inversely correlates with the mRNA level of type I collagen (COL1A2) and directly correlates with the mRNA level of matrix metalloproteinase-1 (MMP1). Overexpression of SIP1 in keloid and hypertrophic scar fibroblasts represses TGF-β1-stimulated COL1A2 expression and induces MMP1 expression. Alternatively, knockdown of SIP1 in normal skin fibroblasts enhance TGF-β1-induced COL1A2 levels. These findings suggest that SIP1 could be a regulator of skin fibrosis, and depletion of SIP1 in pathological scar tissues could result in an up-regulation of collagen and down-regulation of matrix metalloproteinase, leading to an abnormal accumulation of ECM along with fibrosis and pathological scar formation.
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Affiliation(s)
- Zhan-Feng Zhang
- Department of Burns and Cutaneous Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China
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Kumar PA, Brosius FC, Menon RK. The glomerular podocyte as a target of growth hormone action: implications for the pathogenesis of diabetic nephropathy. Curr Diabetes Rev 2011; 7:50-5. [PMID: 21067510 PMCID: PMC4007067 DOI: 10.2174/157339911794273900] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2010] [Accepted: 09/10/2010] [Indexed: 01/28/2023]
Abstract
Involvement of the growth hormone (GH) / insulin-like growth factor 1 (IGF-I) axis in the pathogenesis of diabetic nephropathy (DN) is strongly suggested by studies investigating the impact of GH excess and deficiency on renal structure and function. GH excess in both the human (acromegaly) and in transgenic animal models is characterized by significant structural and functional changes in the kidney. In the human a direct relationship has been noted between the activity of the GH/IGF-1 axis and renal hypertrophy, microalbuminuria, and glomerulosclerosis. Conversely, states of GH deficiency or deficiency or inhibition of GH receptor (GHR) activity confer a protective effect against DN. The glomerular podocyte plays a central and critical role in the structural and functional integrity of the glomerular filtration barrier and maintenance of normal renal function. Recent studies have revealed that the glomerular podocyte is a target of GH action and that GH's actions on the podocyte could be detrimental to the structure and function of the podocyte. These results provide a novel mechanism for GH's role in the pathogenesis of DN and offer the possibility of targeting the GH/IGF-1 axis for the prevention and treatment of DN.
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Affiliation(s)
- P Anil Kumar
- Pediatrics & Communicable Diseases, University of Michigan, Ann Arbor, MI 48109-0718, USA
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Kumar PA, Kotlyarevska K, Dejkhmaron P, Reddy GR, Lu C, Bhojani MS, Menon RK. Growth hormone (GH)-dependent expression of a natural antisense transcript induces zinc finger E-box-binding homeobox 2 (ZEB2) in the glomerular podocyte: a novel action of gh with implications for the pathogenesis of diabetic nephropathy. J Biol Chem 2010; 285:31148-56. [PMID: 20682777 PMCID: PMC2951188 DOI: 10.1074/jbc.m110.132332] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2010] [Revised: 08/02/2010] [Indexed: 11/06/2022] Open
Abstract
Growth hormone (GH) excess results in structural and functional changes in the kidney and is implicated as a causative factor in the development of diabetic nephropathy (DN). Glomerular podocytes are the major barrier to the filtration of serum proteins, and altered podocyte function and/or reduced podocyte number is a key event in the pathogenesis of DN. We have previously shown that podocytes are a target for GH action. To elucidate the molecular basis for the effects of GH on the podocyte, we conducted microarray and RT-quantitative PCR analyses of immortalized human podocytes and identified zinc finger E-box-binding homeobox 2 (ZEB2) to be up-regulated in a GH dose- and time-dependent manner. We established that the GH-dependent increase in ZEB2 levels is associated with increased transcription of a ZEB2 natural antisense transcript required for efficient translation of the ZEB2 transcript. GH down-regulated expression of E- and P-cadherins, targets of ZEB2, and inhibited E-cadherin promoter activity. Mutation of ZEB2 binding sites on the E-cadherin promoter abolished this effect of GH on the E-cadherin promoter. Whereas GH increased podocyte permeability to albumin in a paracellular albumin influx assay, shRNA-mediated knockdown of ZEB2 expression abrogated this effect. We conclude that GH increases expression of ZEB2 in part by increasing expression of a ZEB2 natural antisense transcript. GH-dependent increase in ZEB2 expression results in loss of P- and E-cadherins in podocytes and increased podocyte permeability to albumin. Decreased expression of P- and E-cadherins is implicated in podocyte dysfunction and epithelial-mesenchymal transition observed in DN. We speculate that the actions of GH on ZEB2 and P- and E-cadherin expression play a role in the pathogenesis of microalbuminuria of DN.
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Affiliation(s)
| | | | | | | | - Chunxia Lu
- From Pediatrics and Communicable Diseases
| | | | - Ram K. Menon
- From Pediatrics and Communicable Diseases
- Molecular and Integrative Physiology, and
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