1
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Oei V, Chuang LSH, Matsuo J, Srivastava S, Teh M, Ito Y. RUNX3 inactivates oncogenic MYC through disruption of MYC/MAX complex and subsequent recruitment of GSK3β-FBXW7 cascade. Commun Biol 2023; 6:689. [PMID: 37400551 DOI: 10.1038/s42003-023-05037-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Accepted: 06/12/2023] [Indexed: 07/05/2023] Open
Abstract
MYC is one of the most commonly dysregulated proto-oncogenes in cancer. MYC promotes cancer initiation and maintenance by regulating multiple biological processes, such as proliferation and stem cell function. Here, we show that developmental regulator RUNX3 targets MYC protein for rapid degradation through the glycogen synthase kinase-3 beta-F-box/WD repeat-containing protein 7 (GSK3β-FBXW7) proteolytic pathway. The evolutionarily conserved Runt domain of RUNX3 interacts directly with the basic helix-loop-helix leucine zipper of MYC, resulting in the disruption of MYC/MAX and MYC/MIZ-1 interactions, enhanced GSK3β-mediated phosphorylation of MYC protein at threonine-58 and its subsequent degradation via the ubiquitin-proteasomal pathway. We therefore uncover a previously unknown mode of MYC destabilization by RUNX3 and provide an explanation as to why RUNX3 inhibits early-stage cancer development in gastrointestinal and lung mouse cancer models.
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Affiliation(s)
- Vincent Oei
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, Singapore
- NUS Graduate School, Integrative Sciences and Engineering Programme, Singapore, Singapore
| | - Linda Shyue Huey Chuang
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, Singapore
| | - Junichi Matsuo
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, Singapore
| | - Supriya Srivastava
- Department of Medicine, National University of Singapore, Singapore, Singapore
| | - Ming Teh
- Department of Pathology, National University of Singapore, Singapore, Singapore
| | - Yoshiaki Ito
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, Singapore.
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2
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The RUNX Family Defines Trk Phenotype and Aggressiveness of Human Neuroblastoma through Regulation of p53 and MYCN. Cells 2023; 12:cells12040544. [PMID: 36831211 PMCID: PMC9954111 DOI: 10.3390/cells12040544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 02/03/2023] [Accepted: 02/06/2023] [Indexed: 02/11/2023] Open
Abstract
The Runt-related transcription factor (RUNX) family, which is essential for the differentiation of cells of neural crest origin, also plays a potential role in neuroblastoma tumorigenesis. Consecutive studies in various tumor types have demonstrated that the RUNX family can play either pro-tumorigenic or anti-tumorigenic roles in a context-dependent manner, including in response to chemotherapeutic agents. However, in primary neuroblastomas, RUNX3 acts as a tumor-suppressor, whereas RUNX1 bifunctionally regulates cell proliferation according to the characterized genetic and epigenetic backgrounds, including MYCN oncogenesis. In this review, we first highlight the current knowledge regarding the mechanism through which the RUNX family regulates the neurotrophin receptors known as the tropomyosin-related kinase (Trk) family, which are significantly associated with neuroblastoma aggressiveness. We then focus on the possible involvement of the RUNX family in functional alterations of the p53 family members that execute either tumor-suppressive or dominant-negative functions in neuroblastoma tumorigenesis. By examining the tripartite relationship between the RUNX, Trk, and p53 families, in addition to the oncogene MYCN, we endeavor to elucidate the possible contribution of the RUNX family to neuroblastoma tumorigenesis for a better understanding of potential future molecular-based therapies.
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3
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Dutta B, Osato M. The RUNX Family, a Novel Multifaceted Guardian of the Genome. Cells 2023; 12:255. [PMID: 36672189 PMCID: PMC9856552 DOI: 10.3390/cells12020255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Revised: 12/24/2022] [Accepted: 12/30/2022] [Indexed: 01/11/2023] Open
Abstract
The DNA repair machinery exists to protect cells from daily genetic insults by orchestrating multiple intrinsic and extrinsic factors. One such factor recently identified is the Runt-related transcription factor (RUNX) family, a group of proteins that act as a master transcriptional regulator for multiple biological functions such as embryonic development, stem cell behaviors, and oncogenesis. A significant number of studies in the past decades have delineated the involvement of RUNX proteins in DNA repair. Alterations in RUNX genes cause organ failure and predisposition to cancers, as seen in patients carrying mutations in the other well-established DNA repair genes. Herein, we review the currently existing findings and provide new insights into transcriptional and non-transcriptional multifaceted regulation of DNA repair by RUNX family proteins.
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Affiliation(s)
- Bibek Dutta
- Department of Paediatrics, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117599, Singapore
- Cancer Science Institute of Singapore, National University of Singapore, Singapore 117599, Singapore
| | - Motomi Osato
- Department of Paediatrics, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117599, Singapore
- Cancer Science Institute of Singapore, National University of Singapore, Singapore 117599, Singapore
- International Research Center for Medical Sciences, Kumamoto University, Kumamoto 860-0811, Japan
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4
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Marchionni L, Lobo FP, Kostadinov R, Serra A, Besso FG, Deaglio S, Stratta P, Berrino M, Zanettini C, Imada EL, Omar MN, Gaidano G, Bruno B, Saglio G, Amoroso A. Donor-derived acute myeloid leukemia in solid organ transplantation. Am J Transplant 2022; 22:3111-3119. [PMID: 35979657 PMCID: PMC9897593 DOI: 10.1111/ajt.17174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 08/03/2022] [Accepted: 08/12/2022] [Indexed: 02/05/2023]
Abstract
We report the transmission of acute myeloid leukemia (AML) undetected at donation from a deceased organ donor to two kidneys and one liver recipients. We reviewed the medical records, and performed molecular analyses and whole exome sequencing (WES) to ascertain AML donor origin and its molecular evolution. The liver recipient was diagnosed 11 months after transplantation and died from complications 2 months later. The two kidney recipients (R1 and R2) were diagnosed 19 and 20 months after transplantation and both received treatment for leukemia. R1 died of complications 11 months after diagnosis, while R2 went into complete remission for 44 months, before relapsing. R2 died 10 months later of complications from allogenic bone marrow transplantation. Microsatellite analysis demonstrated donor chimerism in circulating cells from both kidney recipients. Targeted molecular analyses and medical records revealed NPM1 mutation present in the donor and recipients, while FLT3 was mutated only in R1. These findings were confirmed by WES, which revealed additional founder and clonal mutations, and HLA genomic loss in R2. In conclusion, we report the first in-depth genomic analysis of AML transmission following solid organ transplantation, revealing distinct clonal evolution, and providing a potential molecular explanation for tumor escape.
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Affiliation(s)
- Luigi Marchionni
- Department of Pathology and Laboratory Medicine, Weill Cornell Medicine, New York, NY, USA
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Francisco Pereira Lobo
- Department of Genetics, Ecology and Evolution, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Rumen Kostadinov
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Anna Serra
- Department of Clinical and Biological Sciences, University of Turin, Torino, Italy
| | - Federico Genzano Besso
- Immunogenetics and Transplant Biology Service, Azienda Ospedaliero-Universitaria Città della Salute e della Scienza, Torino, Italy
| | - Silvia Deaglio
- Immunogenetics and Transplant Biology Service, Azienda Ospedaliero-Universitaria Città della Salute e della Scienza, Torino, Italy
- Department of Medical Sciences, University of Turin, Torino, Italy
| | - Piero Stratta
- Department of Clinical and Experimental Medicine, University of Eastern Piedmont, Novara, Italy
| | - Monica Berrino
- Immunogenetics and Transplant Biology Service, Azienda Ospedaliero-Universitaria Città della Salute e della Scienza, Torino, Italy
| | - Claudio Zanettini
- Department of Pathology and Laboratory Medicine, Weill Cornell Medicine, New York, NY, USA
| | - Eddie Luidy Imada
- Department of Pathology and Laboratory Medicine, Weill Cornell Medicine, New York, NY, USA
| | - Mohamed N. Omar
- Department of Pathology and Laboratory Medicine, Weill Cornell Medicine, New York, NY, USA
| | - Gianluca Gaidano
- Department of Translational Medicine, University of Eastern Piedmont, Novara, Italy
| | - Benedetto Bruno
- Department of Molecular Biotechnology and Health Sciences, University of Turin, Italy
| | - Giuseppe Saglio
- Department of Clinical and Biological Sciences, University of Turin, Torino, Italy
| | - Antonio Amoroso
- Immunogenetics and Transplant Biology Service, Azienda Ospedaliero-Universitaria Città della Salute e della Scienza, Torino, Italy
- Department of Medical Sciences, University of Turin, Torino, Italy
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5
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Histone Deacetylase Inhibitor I3 Induces the Differentiation of Acute Myeloid Leukemia Cells with t (8; 21) or MLL Gene Translocation and Leukemic Stem-Like Cells. JOURNAL OF ONCOLOGY 2022; 2022:3345536. [PMID: 36072977 PMCID: PMC9441378 DOI: 10.1155/2022/3345536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Accepted: 06/21/2022] [Indexed: 11/28/2022]
Abstract
Acute myeloid leukemia (AML) is a heterogeneous disorder characterized by the clonal expansion and differentiation arrest of leukemic cells in peripheral blood and bone marrow. Though the treatment using cytarabine-based protocol for AML patients with t (8; 21) translocation has improved the 5-year overall survival rate, drug resistance continues to be the principal limiting factor for the cure of the disease. In addition, very few AML patients with mixed lineage leukemia gene rearrangements (MLLr) have a desirable outcome. This study evaluated the cell differentiation effect of a potent HDAC (histone deacetylase) inhibitor, I3, and its possible mechanism on the AML cells with t (8; 21) translocation or MLLr and leukemic stem-like cells (Kasumi-1, KG-1, MOLM-13, and THP-1). I3 exhibited efficient anti-proliferative activity on these cells via promoting cell differentiation, accompanied by the cell cycle exit at G0/G1. Importantly, I3 showed the properties of HDAC inhibition, as assessed by the acetylation of histones H3 and H4, which resulted in blocking the activation of the VEGF (vascular endothelial growth factor)-MAPK (mitogen-activated protein kinase) signaling pathway in the Kasumi-1 cell line. These data demonstrate that I3 could be a potent chromatin-remodeling agent to surmount the differentiation block in AML patients, including those with t (8; 21) translocation or MLLr, and could be a potent and selective agent for AML treatment.
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6
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Wu Y, Zhang B, Dong X, Ma S, Hu S. Discovery of Novel Small Molecule HDAC1, 2, 3 Inhibitors -- Combined
Receptor-Based and Ligand-Based Virtual Screening Strategy. LETT DRUG DES DISCOV 2022. [DOI: 10.2174/1570180819666211220124300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Aims:
This study aims to investigate and validate the potential drug target to HDAC1.
Background:
Human histone deacetylase 1 (HDAC1) can catalyze the deacetylation of histones belonging
to the family of human histone deacetylases (HDACs). Amide hydrolase HDAC1 plays a key role in
the development of many serious cancers such as prostate cancer, gastric cancer, lung cancer, esophageal
cancer, colon cancer, and breast cancer. Therefore, HDAC1 inhibitors, promoting the transcription of a
series of key genes such as the p53 gene and inhibiting the development of cancer through various downstream
mechanisms, have great potential for the treatment of cancer.
Objective:
The objective of this study is to discover new skeleton HDAC1 inhibitors efficiently and conveniently
with therapeutic potential for cancer.
Method:
Based on the crystal structure of HDAC1, through the combination of receptor-based and ligand-
based virtual screening from the commercial compound library, the top-ranked compounds are selected
for purchase through binding modes analysis, and their activities were verified through in vitro
HDAC1 inhibitory biological experiments.
Results:
Based on LeDock, 5ICN showed good distinguishing ability and was used as the receptor. According
to the results of the LeDock docking scoring from receptor-based virtual screening, 69 compounds
with binding energy less than -7.5 kcal/mol were obtained and used for ligand-based virtual
screening. A total of 21 novel compounds with high potential HDAC1 inhibitory activity were collected
by combining the similarity searching (NN) and the multinomial Naive Bayes machine learning model
(NB) methods. Through binding modes analysis, 10 compounds with different structures with potential
HDAC1 inhibitory activity were selected and screened HDAC1 inhibitory in vitro. May267 showed moderate
HDAC1 inhibitory activity, and the inhibition rate was 48% at a concentration of 20 μM.
Conclusion:
This study discovers novel small molecule HDAC1 inhibitors by combined receptor-based
and ligand-based virtual screening strategy, which provides an efficient method for the discovery of other
small molecule drugs. May267 shows moderate HDAC1 inhibitory activity, which can be further optimized
as a lead compound. However, it still has the problem of poor kinase selectivity to be solved.
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Affiliation(s)
- Yi Wu
- Department of General Surgery, Nanjing Medical University, Hangzhou First People’s Hospital, Hangzhou, Zhejiang
310006, P.R. China
| | - Bo Zhang
- Department of Clinical Pharmacology, Key Laboratory of Clinical Cancer Pharmacology
and Toxicology Research of Zhejiang Province, Affiliated Hangzhou First People\'s Hospital, Cancer Center,
Zhejiang University School of Medicine, Hangzhou, Zhejiang 310006, P.R. China
| | - Xiaowu Dong
- Hangzhou Institute of Innovative
Medicine, Innovation Institute for Artificial Intelligence in Medicine, College of Pharmaceutical Sciences, Zhejiang
University, Hangzhou, Zhejiang 310058, P.R. China
| | - Shenglin Ma
- Department of Oncology, Nanjing Medical University, Hangzhou First People’s Hospital, Hangzhou,
Zhejiang 310006, P.R. China
| | - Shengquan Hu
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou,
Zhejiang 310058, P.R. China
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7
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Ma X, Zhao M, Wu ZX, Yao J, Zhang L, Wang J, Hu Z, Wei L, Chen ZS. The Histone Deacetylase Inhibitor I13 Induces Differentiation of M2, M3 and M5 Subtypes of Acute Myeloid Leukemia Cells and Leukemic Stem-Like Cells. Front Oncol 2022; 12:855570. [PMID: 35494054 PMCID: PMC9039182 DOI: 10.3389/fonc.2022.855570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Accepted: 03/14/2022] [Indexed: 11/25/2022] Open
Abstract
Acute myeloid leukemia (AML) is a heterogeneous hematologic malignancy characterized by reduced differentiation of myeloid cells and uncontrolled cell proliferation. AML is prone to drug resistance and has a high recurrence rate during treatment with cytarabine-based chemotherapy. Our study aims to explore the cell differentiation effect of a potent histone deacetylase inhibitor (HDACi), I13, and its possible mechanism on AML cell lines (Kasumi-1, KG-1, MOLM-13 and NB4). It has been shown that I13 can significantly inhibit proliferation and colony formation of these AML cells by inducing cell differentiation coupled with cell-cycle exit at G0/G1. Mechanically, I13 presented the property of HDAC inhibition, as assessed by the acetylation of histone H3, which led to the differentiation of Kasumi-1 cells. In addition, the HDAC inhibition of I13 likely dictated the activation of the antigen processing and presentation pathway, which maybe has the potential to promote immune cells to recognize leukemic cells and respond directly against leukemic cells. These results indicated that I13 could induce differentiation of M3 and M5 subtypes of AML cells, M2 subtype AML cells with t(8;21) translocation and leukemic stem-like cells. Therefore, I13 could be an alternative compound which is able to overcome differentiation blocks in AML.
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Affiliation(s)
- Xiangyu Ma
- School of Pharmacy, Weifang Medical University, Weifang, China
| | - Mengjie Zhao
- School of Pharmacy, Weifang Medical University, Weifang, China
| | - Zhuo-Xun Wu
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John's University, New York, NY, United States
| | - Jingfang Yao
- School of Pharmacy, Weifang Medical University, Weifang, China
| | - Lei Zhang
- School of Pharmacy, Weifang Medical University, Weifang, China
| | - Jinhong Wang
- School of Pharmacy, Weifang Medical University, Weifang, China
| | - Zhenbo Hu
- Laboratory for Stem Cell and Regenerative Medicine, Affiliated Hospital of Weifang Medical University, Weifang, China
| | - Liuya Wei
- School of Pharmacy, Weifang Medical University, Weifang, China
| | - Zhe-Sheng Chen
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John's University, New York, NY, United States
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8
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Rejeski K, Duque-Afonso J, Lübbert M. AML1/ETO and its function as a regulator of gene transcription via epigenetic mechanisms. Oncogene 2021; 40:5665-5676. [PMID: 34331016 PMCID: PMC8460439 DOI: 10.1038/s41388-021-01952-w] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 06/11/2021] [Accepted: 07/07/2021] [Indexed: 01/10/2023]
Abstract
The chromosomal translocation t(8;21) and the resulting oncofusion gene AML1/ETO have long served as a prototypical genetic lesion to model and understand leukemogenesis. In this review, we describe the wide-ranging role of AML1/ETO in AML leukemogenesis, with a particular focus on the aberrant epigenetic regulation of gene transcription driven by this AML-defining mutation. We begin by analyzing how structural changes secondary to distinct genomic breakpoints and splice changes, as well as posttranscriptional modifications, influence AML1/ETO protein function. Next, we characterize how AML1/ETO recruits chromatin-modifying enzymes to target genes and how the oncofusion protein alters chromatin marks, transcription factor binding, and gene expression. We explore the specific impact of these global changes in the epigenetic network facilitated by the AML1/ETO oncofusion on cellular processes and leukemic growth. Furthermore, we define the genetic landscape of AML1/ETO-positive AML, presenting the current literature concerning the incidence of cooperating mutations in genes such as KIT, FLT3, and NRAS. Finally, we outline how alterations in transcriptional regulation patterns create potential vulnerabilities that may be exploited by epigenetically active agents and other therapeutics.
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Affiliation(s)
- Kai Rejeski
- Department of Hematology, Oncology and Stem Cell Transplantation, University of Freiburg Medical Center, Freiburg, Germany.,Department of Hematology and Oncology, University Hospital of the LMU Munich, Munich, Germany.,German Cancer Consortium (DKTK) Freiburg Partner Site, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Jesús Duque-Afonso
- Department of Hematology, Oncology and Stem Cell Transplantation, University of Freiburg Medical Center, Freiburg, Germany.,Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Michael Lübbert
- Department of Hematology, Oncology and Stem Cell Transplantation, University of Freiburg Medical Center, Freiburg, Germany. .,German Cancer Consortium (DKTK) Freiburg Partner Site, German Cancer Research Center (DKFZ), Heidelberg, Germany. .,Faculty of Medicine, University of Freiburg, Freiburg, Germany.
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9
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Gene Expression at a Single Molecule Level: Implications for MDS and AML. Blood 2021; 138:625-636. [PMID: 34157070 DOI: 10.1182/blood.2019004261] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 12/03/2020] [Indexed: 12/11/2022] Open
Abstract
Non-genetic heterogeneity, or gene expression stochasticity, is an important source of variability in biological systems. With the advent and improvement of single molecule resolution technologies, it has been shown that transcription dynamics and resultant transcript number fluctuations generate significant cell-to-cell variability that has important biological effects and may contribute substantially to both tissue homeostasis and disease. In this respect, the pathophysiology of stem cell-derived malignancies such as AML and MDS, which has historically been studied at the ensemble level, may require re-evaluation. To that end, it is our aim in this review to highlight the results of recent single-molecule, biophysical, and systems studies of gene expression dynamics, with the explicit purpose of demonstrating how the insights from these basic science studies may help inform and progress the field of leukemia biology and, ultimately, research into novel therapies.
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10
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Zhao M, Wang J, Qu M, Zhao Y, Wang H, Ke Y, Liu Y, Lei ZN, Liu HM, Hu Z, Wei L, Chen ZS. OGP46 Induces Differentiation of Acute Myeloid Leukemia Cells via Different Optimal Signaling Pathways. Front Cell Dev Biol 2021; 9:652972. [PMID: 33748146 PMCID: PMC7969801 DOI: 10.3389/fcell.2021.652972] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Accepted: 02/09/2021] [Indexed: 11/13/2022] Open
Abstract
Acute myelogenous leukemia (AML) is characterized by blockage of cell differentiation leading to the accumulation of immature cells, which is the most prevalent form of acute leukemia in adults. It is well known that all-trans retinoic acid (ATRA) and arsenic trioxide (ATO) are the preferred drugs for acute promyelocytic leukemia (APL). However, they can lead to irreversible resistance which may be responsible for clinical failure after complete remission (CR). Moreover, the differentiation therapy of ATRA-based treatment has not been effective against AML with t(8;21) translocation. Here we aimed to identify the differentiation effect of OGP46 on AML cell lines (HL-60, NB4, and Kasumi-1) and explore its possible mechanisms. We found that OGP46 has significant inhibitory activity against these cells by triggering cell differentiation with cell-cycle exit at G1/G0 and inhibited the colony-formation capacity of the AML cells. It was shown that OGP46 induced the differentiation of NB4 cells via the transcriptional misregulation in cancer signaling pathway by PML-RARα depletion, while it was attributed to the hematopoietic cell lineage and phagosome pathway in Kasumi-1 cells, which are all critical pathways in cell differentiation. These results highlight that OGP46 is an active agent not only in the APL cell line NB4 but also in AML-M2 cell lines, especially Kasumi-1 with t(8;21) translocation. Therefore, OGP46 may be a potential compound for surmounting the differentiation blockage in AML.
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Affiliation(s)
- Min Zhao
- Laboratory for Stem Cell and Regenerative Medicine, Affiliated Hospital of Weifang Medical University, Weifang, China.,School of Pharmacy, Weifang Medical University, Weifang, China
| | - Jiangyun Wang
- Laboratory for Stem Cell and Regenerative Medicine, Affiliated Hospital of Weifang Medical University, Weifang, China.,School of Pharmacy, Weifang Medical University, Weifang, China
| | - Mei Qu
- Laboratory for Stem Cell and Regenerative Medicine, Affiliated Hospital of Weifang Medical University, Weifang, China.,School of Pharmacy, Weifang Medical University, Weifang, China
| | - Yao Zhao
- Laboratory for Stem Cell and Regenerative Medicine, Affiliated Hospital of Weifang Medical University, Weifang, China
| | - Haihua Wang
- Laboratory for Stem Cell and Regenerative Medicine, Affiliated Hospital of Weifang Medical University, Weifang, China
| | - Yu Ke
- School of Pharmacy, Zhengzhou University, Zhengzhou, China
| | - Ying Liu
- School of Pharmacy, Zhengzhou University, Zhengzhou, China
| | - Zi-Ning Lei
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John's University, New York, NY, United States.,School of Public Health, Guangzhou Medical University, Guangzhou, China
| | - Hong-Min Liu
- School of Pharmacy, Zhengzhou University, Zhengzhou, China
| | - Zhenbo Hu
- Laboratory for Stem Cell and Regenerative Medicine, Affiliated Hospital of Weifang Medical University, Weifang, China
| | - Liuya Wei
- Laboratory for Stem Cell and Regenerative Medicine, Affiliated Hospital of Weifang Medical University, Weifang, China.,School of Pharmacy, Weifang Medical University, Weifang, China
| | - Zhe-Sheng Chen
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John's University, New York, NY, United States
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11
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Qi X, Zhang X, Liu X, Tang W, Dai J, Chen A, Lin Q, Zhu T, Li J. HDN-1 induces cell differentiation toward apoptosis in promyelocytic leukemia cells depending on its selective effect on client proteins of Hsp90. Toxicol Appl Pharmacol 2021; 417:115459. [PMID: 33609515 DOI: 10.1016/j.taap.2021.115459] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 01/27/2021] [Accepted: 02/09/2021] [Indexed: 11/30/2022]
Abstract
Heat Shock Protein 90 (Hsp90) is frequently upregulated in many cancers, and its inhibition simultaneously blocks multiple signaling pathways, resulting in cell differentiation or apoptosis. However, the complexity of Hsp90 in differentiation and its relation with apoptosis have remained unsettled. In this study, we demonstrated that HDN-1, a C-terminal inhibitor of Hsp90, induced the differentiation of HL-60 cells toward apoptosis. HDN-1 induced the differentiation of cells containing mutant AML1-ETO into mature granulocytes, which was related to its selective effect on client proteins of Hsp90. HDN-1 destabilized AML1-ETO and preserved C/EBPβ at the same time, thereby induced a total increase in C/EBPβ levels because of AML1-ETO negative regulation to C/EBPβ expression. Neither HDN-1 nor 17-AAG (an N-terminal inhibitor of Hsp90) led to the differentiation of NB4 cells because mutant PML-RARα was not affected as a client protein of Hsp90; thus, no additional expression of C/EBPβ was induced. 17-AAG did not affect the differentiation of HL-60 cells due to decreased AML1-ETO and C/EBPβ levels. These results indicate that HDN-1 drives cell differentiation toward apoptosis depending on its selective influence on client proteins of Hsp90, establishing the relationship between differentiation and apoptosis and uncovering the mechanism of HDN-1 in promyelocytic leukemia cell differentiation. Moreover, HDN-1 is very promising for the development of anticancer agents with the induction of differentiation.
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MESH Headings
- Antineoplastic Agents/pharmacology
- Apoptosis/drug effects
- Benzoquinones/pharmacology
- CCAAT-Enhancer-Binding Protein-beta/genetics
- CCAAT-Enhancer-Binding Protein-beta/metabolism
- Cell Differentiation/drug effects
- Cell Lineage
- Core Binding Factor Alpha 2 Subunit/genetics
- Core Binding Factor Alpha 2 Subunit/metabolism
- Diketopiperazines/pharmacology
- Disulfides/pharmacology
- Gene Expression Regulation, Leukemic
- Granulocytes/drug effects
- Granulocytes/metabolism
- Granulocytes/pathology
- HL-60 Cells
- HSP90 Heat-Shock Proteins/antagonists & inhibitors
- HSP90 Heat-Shock Proteins/genetics
- HSP90 Heat-Shock Proteins/metabolism
- Humans
- Lactams, Macrocyclic/pharmacology
- Leukemia, Promyelocytic, Acute/drug therapy
- Leukemia, Promyelocytic, Acute/genetics
- Leukemia, Promyelocytic, Acute/metabolism
- Leukemia, Promyelocytic, Acute/pathology
- Oncogene Proteins, Fusion/genetics
- Oncogene Proteins, Fusion/metabolism
- RUNX1 Translocation Partner 1 Protein/genetics
- RUNX1 Translocation Partner 1 Protein/metabolism
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Affiliation(s)
- Xin Qi
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, PR China
| | - Xintong Zhang
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, PR China
| | - Xiaochun Liu
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, PR China
| | - Wei Tang
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, PR China
| | - Jiajia Dai
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, PR China
| | - Ao Chen
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, PR China
| | - Qian Lin
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, PR China
| | - Tianjiao Zhu
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, PR China; Open Studio for Druggability Research of Marine Natural Products, Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), 1 Wenhai Road, Aoshanwei, Jimo, Qingdao 266237, PR China
| | - Jing Li
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, PR China; Open Studio for Druggability Research of Marine Natural Products, Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), 1 Wenhai Road, Aoshanwei, Jimo, Qingdao 266237, PR China.
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12
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Zhao X, Liu HQ, Wang LN, Yang L, Liu XL. Current and emerging molecular and epigenetic disease entities in acute myeloid leukemia and a critical assessment of their therapeutic modalities. Semin Cancer Biol 2020; 83:121-135. [PMID: 33242577 DOI: 10.1016/j.semcancer.2020.11.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2020] [Revised: 11/15/2020] [Accepted: 11/16/2020] [Indexed: 01/08/2023]
Abstract
Acute myeloid leukemia (AML) is the most frequently diagnosed acute leukemia, and its incidence increases with age. Although the etiology of AML remains unknown, exposure to genotoxic agents or some prior hematologic disorders could lead to the development of this condition. The pathogenesis of AML involves the development of malignant transformation of hematopoietic stem cells that undergo successive genomic alterations, ultimately giving rise to a full-blown disease. From the disease biology perspective, AML is considered to be extremely complex with significant genetic, epigenetic, and phenotypic variations. Molecular and cytogenetic alterations in AML include mutations in those subsets of genes that are involved in normal cell proliferation, maturation and survival, thus posing significant challenge to targeting these pathways without attendant toxicity. In addition, multiple malignant cells co-exist in the majority of AML patients. Individual subclones are characterized by unique genetic and epigenetic abnormalities, which contribute to the differences in their response to treatment. As a result, despite a dramatic progress in our understanding of the pathobiology of AML, not much has changed in therapeutic approaches to treat AML in the past four decades. Dose and regimen modifications with improved supportive care have contributed to improved outcomes by reducing toxicity-related side effects. Several drug candidates are currently being developed, including targeted small-molecule inhibitors, cytotoxic chemotherapies, monoclonal antibodies and epigenetic drugs. This review summarizes the current state of affairs in the pathobiological and therapeutic aspects of AML.
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Affiliation(s)
- Xin Zhao
- Department of Paediatrics, The First Hospital of Jilin University, Changchun, China
| | - Huan-Qiu Liu
- Department of Anesthesiology, The First Hospital of Jilin University, Changchun, China
| | - Li-Na Wang
- Department of Paediatrics, The First Hospital of Jilin University, Changchun, China
| | - Le Yang
- Department of Endocrinology, The People's Hospital of Jilin Province, Changchun, China.
| | - Xiao-Liang Liu
- Department of Hematology, The First Hospital of Jilin University, Changchun, China.
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13
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Soares-Lima SC, Pombo-de-Oliveira MS, Carneiro FRG. The multiple ways Wnt signaling contributes to acute leukemia pathogenesis. J Leukoc Biol 2020; 108:1081-1099. [PMID: 32573851 DOI: 10.1002/jlb.2mr0420-707r] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 04/20/2020] [Accepted: 05/28/2020] [Indexed: 01/19/2023] Open
Abstract
WNT proteins constitute a very conserved family of secreted glycoproteins that act as short-range ligands for signaling with critical roles in hematopoiesis, embryonic development, and tissue homeostasis. These proteins transduce signals via the canonical pathway, which is β-catenin-mediated and better-characterized, or via more diverse noncanonical pathways that are β-catenin independent and comprise the planar cell polarity (PCP) pathway and the WNT/Ca++ pathways. Several proteins regulate Wnt signaling through a variety of sophisticated mechanisms. Disorders within the pathway can contribute to various human diseases, and the dysregulation of Wnt pathways by different molecular mechanisms is implicated in the pathogenesis of many types of cancer, including the hematological malignancies. The types of leukemia differ considerably and can be subdivided into chronic, myeloid or lymphocytic, and acute, myeloid or lymphocytic, leukemia, according to the differentiation stage of the predominant cells, the progenitor lineage, the diagnostic age strata, and the specific molecular drivers behind their development. Here, we review the role of Wnt signaling in normal hematopoiesis and discuss in detail the multiple ways canonical Wnt signaling can be dysregulated in acute leukemia, including alterations in gene expression and protein levels, epigenetic regulation, and mutations. Furthermore, we highlight the different impacts of these alterations, considering the distinct forms of the disease, and the therapeutic potential of targeting Wnt signaling.
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Affiliation(s)
- Sheila C Soares-Lima
- Epigenetics Group, Molecular Carcinogenesis Program, Brazilian National Cancer Institute, Rio de Janeiro, Brazil
| | - Maria S Pombo-de-Oliveira
- Pediatric Hematology-Oncology Program Research Center, National Cancer Institute, Rio de Janeiro, Brazil
| | - Flávia R G Carneiro
- FIOCRUZ, Center of Technological Development in Health (CDTS), Rio de Janeiro, Brazil.,FIOCRUZ, Laboratório Interdisciplinar de Pesquisas Médicas-Instituto Oswaldo Cruz, Rio de Janeiro, Brazil
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14
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Schoenherr C, Wohlan K, Dallmann I, Pich A, Hegermann J, Ganser A, Hilfiker-Kleiner D, Heidenreich O, Scherr M, Eder M. Stable depletion of RUNX1-ETO in Kasumi-1 cells induces expression and enhanced proteolytic activity of Cathepsin G and Neutrophil Elastase. PLoS One 2019; 14:e0225977. [PMID: 31826021 PMCID: PMC6905530 DOI: 10.1371/journal.pone.0225977] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Accepted: 11/15/2019] [Indexed: 01/24/2023] Open
Abstract
The oncogenic fusion protein RUNX1-ETO is a product of the t(8;21) translocation and consists of the hematopoietic transcriptional master regulator RUNX1 and the repressor ETO. RUNX1-ETO is found in 10–15% of acute myeloid leukemia and interferes with the expression of genes that are essential for myeloid differentiation. The neutrophil serine protease Cathepsin G is one of the genes suppressed by RUNX1-ETO, but little is known about its impact on the regulation of other lysosomal proteases. By lentiviral transduction of the t(8;21) positive cell line Kasumi-1 with an RUNX1-ETO specific shRNA, we analyzed long-term effects of stable RUNX1-ETO silencing on cellular phenotypes and target gene expression. Stable anti RUNX1-ETO RNAi reduces both proliferation and apoptosis in Kasumi-1 cells. In addition, long-term knockdown of RUNX1-ETO leads to an upregulation of proteolytic activity in Kasumi-1 cells, which may be released in vitro upon cell lysis leading to massive degradation of cellular proteins. We therefore propose that protein expression data of RUNX1-ETO-silenced Kasumi-1 cells must be analyzed with caution, as cell lysis conditions can heavily influence the results of studies on protein expression. Next, a mass spectrometry-based approach was used to identify protease cleavage patterns in RUNX1-ETO-depleted Kasumi-1 cells and Neutrophil Elastase has been identified as a RUNX1-ETO candidate target. Finally, proteolytic activity of Neutrophil Elastase and Cathepsin G was functionally confirmed by si/shRNA-mediated knockdown in Kasumi-1 cells.
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Affiliation(s)
- Caroline Schoenherr
- Department of Hematology, Hemostasis, Oncology and Stem Cell Transplantation, Hannover Medical School, Hannover, Germany
| | - Katharina Wohlan
- Department of Hematology, Hemostasis, Oncology and Stem Cell Transplantation, Hannover Medical School, Hannover, Germany
| | - Iris Dallmann
- Department of Hematology, Hemostasis, Oncology and Stem Cell Transplantation, Hannover Medical School, Hannover, Germany
| | - Andreas Pich
- Department of Toxicology, Research Core Unit Proteomics, Hannover Medical School, Hannover, Germany
| | - Jan Hegermann
- Department of Functional and Applied Anatomy, Research Core Unit Electron Microscopy, Hannover Medical School, Hannover, Germany
| | - Arnold Ganser
- Department of Hematology, Hemostasis, Oncology and Stem Cell Transplantation, Hannover Medical School, Hannover, Germany
| | | | - Olaf Heidenreich
- Wolfson Childhood Cancer Research Centre, Northern Institute for Cancer Research, Newcastle University, Newcastle, United Kingdom
- Princess Maxima Center for Pediatric Oncology, Utrecht, Netherlands
| | - Michaela Scherr
- Department of Hematology, Hemostasis, Oncology and Stem Cell Transplantation, Hannover Medical School, Hannover, Germany
- * E-mail: (MS); (ME)
| | - Matthias Eder
- Department of Hematology, Hemostasis, Oncology and Stem Cell Transplantation, Hannover Medical School, Hannover, Germany
- * E-mail: (MS); (ME)
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15
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Beghini A. Core Binding Factor Leukemia: Chromatin Remodeling Moves Towards Oncogenic Transcription. Cancers (Basel) 2019; 11:E1973. [PMID: 31817911 PMCID: PMC6966602 DOI: 10.3390/cancers11121973] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 12/02/2019] [Accepted: 12/05/2019] [Indexed: 11/25/2022] Open
Abstract
Acute myeloid leukemia (AML), the most common acute leukemia in adults, is a heterogeneous malignant clonal disorder arising from multipotent hematopoietic progenitor cells characterized by genetic and concerted epigenetic aberrations. Core binding factor-Leukemia (CBFL) is characterized by the recurrent reciprocal translocations t(8;21)(q22;q22) or inv(16)(p13;q22) that, expressing the distinctive RUNX1-RUNX1T1 (also known as Acute myeloid leukemia1-eight twenty-one, AML1-ETO or RUNX1/ETO) or CBFB-MYH11 (also known as CBFβ-ΣMMHX) translocation product respectively, disrupt the essential hematopoietic function of the CBF. In the past decade, remarkable progress has been achieved in understanding the structure, three-dimensional (3D) chromosomal topology, and disease-inducing genetic and epigenetic abnormalities of the fusion proteins that arise from disruption of the CBF subunit alpha and beta genes. Although CBFLs have a relatively good prognosis compared to other leukemia subtypes, 40-50% of patients still relapse, requiring intensive chemotherapy and allogenic hematopoietic cell transplantation (alloHCT). To provide a rationale for the CBFL-associated altered hematopoietic development, in this review, we summarize the current understanding on the various molecular mechanisms, including dysregulation of Wnt/β-catenin signaling as an early event that triggers the translocations, playing a pivotal role in the pathophysiology of CBFL. Translation of these findings into the clinical setting is just beginning by improvement in risk stratification, MRD assessment, and development of targeted therapies.
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16
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Shahrabi S, Maleknia M, Tavakolifar Y, D. Zayeri Z, Saki N. Neutropenia and leukemia development: genetic risk factors and prognosis. Leuk Lymphoma 2019; 60:3363-3374. [DOI: 10.1080/10428194.2019.1630622] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Saeid Shahrabi
- Department of Biochemistry and Hematology, Faculty of Medicine, Semnan University of Medical Sciences, Semnan, Iran
| | - Mohsen Maleknia
- Thalassemia & Hemoglobinopathy Research Center, Health Research Institute, Ahvaz Jundishapur, University of Medical Sciences, Ahvaz, Iran
| | - Yousef Tavakolifar
- Pediatric Health Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Zeinab D. Zayeri
- Thalassemia & Hemoglobinopathy Research Center, Health Research Institute, Ahvaz Jundishapur, University of Medical Sciences, Ahvaz, Iran
| | - Najmaldin Saki
- Thalassemia & Hemoglobinopathy Research Center, Health Research Institute, Ahvaz Jundishapur, University of Medical Sciences, Ahvaz, Iran
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17
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Zhang S, Zhao Y, Heaster TM, Fischer MA, Stengel KR, Zhou X, Ramsey H, Zhou MM, Savona MR, Skala MC, Hiebert SW. BET inhibitors reduce cell size and induce reversible cell cycle arrest in AML. J Cell Biochem 2019; 120:7309-7322. [PMID: 30417424 PMCID: PMC6513713 DOI: 10.1002/jcb.28005] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Accepted: 10/10/2018] [Indexed: 02/06/2023]
Abstract
Inhibitors of the bromodomain and extraterminal domain family (BETi) offer a new approach to treat hematological malignancies, with leukemias containing mixed lineage leukemia rearrangements being especially sensitive due to a reliance on the regulation of transcription elongation. We explored the mechanism of action of BETi in cells expressing the t(8;21), and show that these compounds reduced the size of acute myeloid leukemia cells, triggered a rapid but reversible G0 /G1 arrest, and with time, cause cell death. Meta-analysis of PRO-seq data identified ribosomal genes, which are regulated by MYC, were downregulated within 3 hours of addition of the BETi. This reduction of MYC regulated metabolic genes coincided with the loss of mitochondrial respiration and large reductions in the glycolytic rate. In addition, gene expression analysis showed that transcription of BCL2 was rapidly affected by BETi but this did not cause dramatic increases in cell death. Cell cycle arrest, lowered metabolic activity, and reduced BCL2 levels suggested that a second compound was needed to push these cells over the apoptotic threshold. Indeed, low doses of the BCL2 inhibitor, venetoclax, in combination with the BETi was a potent combination in t(8;21) containing cells. Thus, BET inhibitors that affect MYC and BCL2 expression should be considered for combination therapy with venetoclax.
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Affiliation(s)
- Susu Zhang
- Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, Tennessee 37232
| | - Yue Zhao
- Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, Tennessee 37232
| | - Tiffany M. Heaster
- Morgridge Institute for Research and the Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI 53706
| | - Melissa A. Fischer
- Department of Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee 37232
| | - Kristy R. Stengel
- Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, Tennessee 37232
| | - Xiaofan Zhou
- Department of Biological Sciences, Vanderbilt University School of Medicine, Nashville, Tennessee 37232
| | - Haley Ramsey
- Department of Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee 37232
| | - Ming-Ming Zhou
- Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, New York 10029
| | - Michael R. Savona
- Morgridge Institute for Research and the Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI 53706;,Vanderbilt-Ingram Cancer Center, Vanderbilt University School of Medicine, Nashville, Tennessee 37027
| | - Melissa C. Skala
- Morgridge Institute for Research and the Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI 53706
| | - Scott W. Hiebert
- Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, Tennessee 37232;,Vanderbilt-Ingram Cancer Center, Vanderbilt University School of Medicine, Nashville, Tennessee 37027,To whom correspondence should be sent: Department of Biochemistry, 512 Preston Research Building, Vanderbilt University School of Medicine, 2220 Pierce Ave., Nashville Tennessee, 37232, Phone: (615) 936-3582; Fax: (615) 936-1790;
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18
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Lee JW, Kim DM, Jang JW, Park TG, Song SH, Lee YS, Chi XZ, Park IY, Hyun JW, Ito Y, Bae SC. RUNX3 regulates cell cycle-dependent chromatin dynamics by functioning as a pioneer factor of the restriction-point. Nat Commun 2019; 10:1897. [PMID: 31015486 PMCID: PMC6479060 DOI: 10.1038/s41467-019-09810-w] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Accepted: 04/02/2019] [Indexed: 12/31/2022] Open
Abstract
The cellular decision regarding whether to undergo proliferation or death is made at the restriction (R)-point, which is disrupted in nearly all tumors. The identity of the molecular mechanisms that govern the R-point decision is one of the fundamental issues in cell biology. We found that early after mitogenic stimulation, RUNX3 binds to its target loci, where it opens chromatin structure by sequential recruitment of Trithorax group proteins and cell-cycle regulators to drive cells to the R-point. Soon after, RUNX3 closes these loci by recruiting Polycomb repressor complexes, causing the cell to pass through the R-point toward S phase. If the RAS signal is constitutively activated, RUNX3 inhibits cell cycle progression by maintaining R-point-associated genes in an open structure. Our results identify RUNX3 as a pioneer factor for the R-point and reveal the molecular mechanisms by which appropriate chromatin modifiers are selectively recruited to target loci for appropriate R-point decisions. The transcription factor RUNX3 plays a key role in the restriction point of cell cycle. Here the authors showed that RUNX3 binds and opens chromatin structure of restriction point associated genes, by sequential recruitment of chromatin remodeling complex, transcription complex and cell cycle regulators.
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Affiliation(s)
- Jung-Won Lee
- Department of Biochemistry, School of Medicine, and Institute for Tumor Research, Chungbuk National University, Cheongju, 28644, South Korea
| | - Da-Mi Kim
- Department of Biochemistry, School of Medicine, and Institute for Tumor Research, Chungbuk National University, Cheongju, 28644, South Korea
| | - Ju-Won Jang
- Department of Biochemistry, School of Medicine, and Institute for Tumor Research, Chungbuk National University, Cheongju, 28644, South Korea
| | - Tae-Geun Park
- Department of Biochemistry, School of Medicine, and Institute for Tumor Research, Chungbuk National University, Cheongju, 28644, South Korea
| | - Soo-Hyun Song
- Department of Biochemistry, School of Medicine, and Institute for Tumor Research, Chungbuk National University, Cheongju, 28644, South Korea
| | - You-Soub Lee
- Department of Biochemistry, School of Medicine, and Institute for Tumor Research, Chungbuk National University, Cheongju, 28644, South Korea
| | - Xin-Zi Chi
- Department of Biochemistry, School of Medicine, and Institute for Tumor Research, Chungbuk National University, Cheongju, 28644, South Korea
| | - Il Yeong Park
- College of Pharmacy, Chungbuk National University, Cheongju, 361-763, South Korea
| | - Jin-Won Hyun
- Department of Biochemistry, School of Medicine, Jeju National University, Jeju, 63243, South Korea
| | - Yoshiaki Ito
- Cancer Science Institute of Singapore, National University of Singapore, 14 Medical Drive, Singapore, Singapore, 117599
| | - Suk-Chul Bae
- Department of Biochemistry, School of Medicine, and Institute for Tumor Research, Chungbuk National University, Cheongju, 28644, South Korea.
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19
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Ko A, Han SY, Song J. Regulatory Network of ARF in Cancer Development. Mol Cells 2018; 41:381-389. [PMID: 29665672 PMCID: PMC5974615 DOI: 10.14348/molcells.2018.0100] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 04/03/2018] [Accepted: 04/04/2018] [Indexed: 12/21/2022] Open
Abstract
ARF is a tumor suppressor protein that has a pivotal role in the prevention of cancer development through regulating cell proliferation, senescence, and apoptosis. As a factor that induces senescence, the role of ARF as a tumor suppressor is closely linked to the p53-MDM2 axis, which is a key process that restrains tumor formation. Thus, many cancer cells either lack a functional ARF or p53, which enables them to evade cell oncogenic stress-mediated cycle arrest, senescence, or apoptosis. In particular, the ARF gene is a frequent target of genetic and epigenetic alterations including promoter hyper-methylation or gene deletion. However, as many cancer cells still express ARF, pathways that negatively modulate transcriptional or post-translational regulation of ARF could be potentially important means for cancer cells to induce cellular proliferation. These recent findings of regulators affecting ARF protein stability along with its low levels in numerous human cancers indicate the significance of an ARF post-translational mechanism in cancers. Novel findings of regulators stimulating or suppressing ARF function would provide new therapeutic targets to manage cancer- and senescence-related diseases. In this review, we present the current knowledge on the regulation and alterations of ARF expression in human cancers, and indicate the importance of regulators of ARF as a prognostic marker and in potential therapeutic strategies.
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Affiliation(s)
- Aram Ko
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul 03722,
Korea
| | - Su Yeon Han
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul 03722,
Korea
| | - Jaewhan Song
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul 03722,
Korea
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20
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Tijchon E, van Emst L, Yuniati L, van Ingen Schenau D, Gerritsen M, van der Meer LT, Williams O, Hoogerbrugge PM, Scheijen B, van Leeuwen FN. Tumor suppressor BTG1 limits activation of BCL6 expression downstream of ETV6-RUNX1. Exp Hematol 2018; 60:57-62.e3. [PMID: 29408281 DOI: 10.1016/j.exphem.2018.01.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Revised: 01/10/2018] [Accepted: 01/20/2018] [Indexed: 11/28/2022]
Abstract
Translocation t(12;21) (p13;q22), giving rise to the ETV6-RUNX1 fusion gene, is the most common genetic abnormality in childhood B-cell precursor acute lymphoblastic leukemia (BCP-ALL). This translocation usually arises in utero, but its expression is insufficient to induce leukemia and requires other cooperating genetic lesions for BCP-ALL to develop. Deletions affecting the transcriptional coregulator BTG1 are frequently observed in ETV6-RUNX1-positive leukemia. Here we report that Btg1 deficiency enhances the self-renewal capacity of ETV6-RUNX1-positive mouse fetal liver-derived hematopoietic progenitors (FL-HPCs). Combined expression of the fusion protein and a loss of BTG1 drive upregulation of the proto-oncogene Bcl6 and downregulation of BCL6 target genes, such as p19Arf and Tp53. Similarly, ectopic expression of BCL6 promotes the self-renewal and clonogenic replating capacity of FL-HPCs, by suppressing the expression of p19Arf and Tp53. Together these results identify BCL6 as a potential driver of ETV6-RUNX1-mediated leukemogenesis, which could involve loss of BTG1-dependent suppression of ETV6-RUNX1 function.
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Affiliation(s)
- Esther Tijchon
- Laboratory of Pediatric Oncology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Liesbeth van Emst
- Laboratory of Pediatric Oncology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Laurensia Yuniati
- Laboratory of Pediatric Oncology, Radboud University Medical Center, Nijmegen, The Netherlands
| | | | - Mylène Gerritsen
- Laboratory of Pediatric Oncology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Laurens T van der Meer
- Laboratory of Pediatric Oncology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Owen Williams
- Molecular Haematology and Cancer Biology Unit, UCL-Institute of Child Health, London, United Kingdom
| | | | - Blanca Scheijen
- Laboratory of Pediatric Oncology, Radboud University Medical Center, Nijmegen, The Netherlands; Department of Pathology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Frank N van Leeuwen
- Laboratory of Pediatric Oncology, Radboud University Medical Center, Nijmegen, The Netherlands.
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21
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Inoue K, Fry EA. Aberrant Expression of p14 ARF in Human Cancers: A New Biomarker? TUMOR & MICROENVIRONMENT 2018; 1:37-44. [PMID: 30740529 PMCID: PMC6364748 DOI: 10.4103/tme.tme_24_17] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The ARF and INK4a genes are located on the CDKN2a locus, both showing tumor suppressive activity. ARF has been shown to monitor potentially harmful oncogenic signalings, making early stage cancer cells undergo senescence or programmed cell death to prevent cancer. Conversely, INK4a detects both aging and incipient cancer cell signals, and thus these two gene functions are different. The efficiency of detection of oncogenic signals is more efficient for the for the former than the latter in the mouse system. Both ARF and INK4a genes are inactivated by gene deletion, promoter methylation, frame shift, aberrant splicing although point mutations for the coding region affect only the latter. Recent studies show the splicing alterations that affect only ARF or both ARF and INK4a genes suggesting that ARF is inactivated in human tumors more frequently than what was previously thought. The ARF gene is activated by E2Fs and Dmp1 transcription factors while it is repressed by Bmi1, Tbx2/3, Twist1, and Pokemon nuclear proteins. It is also regulated at protein levels by Arf ubiquitin ligase named ULF, MKRN1, and Siva1. The prognostic value of ARF overexpression is controversial since it is induced in early stage cancer cells to eliminate pre-malignant cells (better prognosis); however, it may also indicate that the tumor cells have mutant p53 associated with worse prognosis. The ARF tumor suppressive protein can be used as a biomarker to detect early stage cancer cells as well as advanced stage tumors with p53 inactivation.
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Affiliation(s)
- Kazushi Inoue
- The Department of Pathology, Wake Forest University Health Sciences, Winston-Salem, NC 27157
| | - Elizabeth A. Fry
- The Department of Pathology, Wake Forest University Health Sciences, Winston-Salem, NC 27157
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22
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Anderson G, Mackay N, Gilroy K, Hay J, Borland G, McDonald A, Bell M, Hassanudin SA, Cameron E, Neil JC, Kilbey A. RUNX-mediated growth arrest and senescence are attenuated by diverse mechanisms in cells expressing RUNX1 fusion oncoproteins. J Cell Biochem 2017; 119:2750-2762. [PMID: 29052866 PMCID: PMC5813226 DOI: 10.1002/jcb.26443] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Accepted: 10/04/2017] [Indexed: 01/27/2023]
Abstract
RUNX gene over‐expression inhibits growth of primary cells but transforms cells with tumor suppressor defects, consistent with reported associations with tumor progression. In contrast, chromosomal translocations involving RUNX1 are detectable in utero, suggesting an initiating role in leukemias. How do cells expressing RUNX1 fusion oncoproteins evade RUNX‐mediated growth suppression? Previous studies showed that the TEL‐RUNX1 fusion from t(12;21) B‐ALLs is unable to induce senescence‐like growth arrest (SLGA) in primary fibroblasts while potent activity is displayed by the RUNX1‐ETO fusion found in t(8;21) AMLs. We now show that SLGA potential is suppressed in TEL‐RUNX1 but reactivated by deletion of the TEL HLH domain or mutation of a key residue (K99R). Attenuation of SLGA activity is also a feature of RUNX1‐ETO9a, a minor product of t(8;21) translocations with increased leukemogenicity. Finally, while RUNX1‐ETO induces SLGA it also drives a potent senescence‐associated secretory phenotype (SASP), and promotes the immortalization of rare cells that escape SLGA. Moreover, the RUNX1‐ETO SASP is not strictly linked to growth arrest as it is largely suppressed by RUNX1 and partially activated by RUNX1‐ETO9a. These findings underline the heterogeneous nature of premature senescence and the multiple mechanisms by which this failsafe process is subverted in cells expressing RUNX1 oncoproteins.
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Affiliation(s)
- Gail Anderson
- Molecular Oncology Laboratory, Centre for Virus Research, Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, UK
| | - Nancy Mackay
- Molecular Oncology Laboratory, Centre for Virus Research, Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, UK
| | - Kathryn Gilroy
- Molecular Oncology Laboratory, Centre for Virus Research, Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, UK
| | - Jodie Hay
- Molecular Oncology Laboratory, Centre for Virus Research, Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, UK
| | - Gillian Borland
- Molecular Oncology Laboratory, Centre for Virus Research, Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, UK
| | - Alma McDonald
- Molecular Oncology Laboratory, Centre for Virus Research, Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, UK
| | - Margaret Bell
- School of Veterinary Medicine, University of Glasgow, Glasgow, UK
| | - Siti Ayuni Hassanudin
- Molecular Oncology Laboratory, Centre for Virus Research, Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, UK
| | - Ewan Cameron
- School of Veterinary Medicine, University of Glasgow, Glasgow, UK
| | - James C Neil
- Molecular Oncology Laboratory, Centre for Virus Research, Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, UK
| | - Anna Kilbey
- Molecular Oncology Laboratory, Centre for Virus Research, Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, UK
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Shah V, Boyd KD, Houlston RS, Kaiser MF. Constitutional mutation in CDKN2A is associated with long term survivorship in multiple myeloma: a case report. BMC Cancer 2017; 17:718. [PMID: 29110637 PMCID: PMC5674776 DOI: 10.1186/s12885-017-3715-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Accepted: 10/30/2017] [Indexed: 11/11/2022] Open
Abstract
Background Multiple Myeloma is a cancer of plasma cells associated with significantly reduced survival. Long term survivorship from myeloma is very rare and despite advances in its treatment the disease is generally considered incurable. We report a patient diagnosed with myeloma carrying a germline mutation of a tumour suppressor gene who has effectively been cured. Case presentation A 36-year-old woman was diagnosed with IgG lambda myeloma in 1985. She was treated with melphalan chemotherapy followed by high-dose melphalan and autologous stem cell rescue and since remained in complete remission despite not having received any additional therapy. After eliciting a prior history of multiple primary melanomas and breast cancer, she was tested for and shown to be a carrier for a germline mutation in CDKN2A. Conclusions This is the second case report of germline mutation of CDKN2A being associated with myeloma. CDKN2A is a stabiliser of p53. Long term survivorship after high dose DNA damaging chemotherapy with melphalan in this patient is compatible with an increased chemo-sensitivity due to impairment of the DNA repair pathway.
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Affiliation(s)
- Vallari Shah
- Division of Molecular Pathology, The Institute of Cancer Research, London, UK.
| | - Kevin D Boyd
- Department of Haemato-Oncology, Royal Marsden Hospital, London, UK
| | - Richard S Houlston
- Division of Molecular Pathology, The Institute of Cancer Research, London, UK.,Division of Genetics and Epidemiology, The Institute of Cancer Research, London, UK
| | - Martin F Kaiser
- Division of Molecular Pathology, The Institute of Cancer Research, London, UK
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Lin S, Mulloy JC, Goyama S. RUNX1-ETO Leukemia. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 962:151-173. [PMID: 28299657 DOI: 10.1007/978-981-10-3233-2_11] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
AML1-ETO leukemia is the most common cytogenetic subtype of acute myeloid leukemia, defined by the presence of t(8;21). Remarkable progress has been achieved in understanding the molecular pathogenesis of AML1-ETO leukemia. Proteomic surveies have shown that AML-ETO forms a stable complex with several transcription factors, including E proteins. Genome-wide transcriptome and ChIP-seq analyses have revealed the genes directly regulated by AML1-ETO, such as CEBPA. Several lines of evidence suggest that AML1-ETO suppresses endogenous DNA repair in cells to promote mutagenesis, which facilitates acquisition of cooperating secondary events. Furthermore, it has become increasingly apparent that a delicate balance of AML1-ETO and native AML1 is important to sustain the malignant cell phenotype. Translation of these findings into the clinical setting is just beginning.
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Affiliation(s)
- Shan Lin
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - James C Mulloy
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Susumu Goyama
- Division of Cellular Therapy, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan.
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Chuang LSH, Ito K, Ito Y. Roles of RUNX in Solid Tumors. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 962:299-320. [PMID: 28299665 DOI: 10.1007/978-981-10-3233-2_19] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
All RUNX genes have been implicated in the development of solid tumors, but the role each RUNX gene plays in the different tumor types is complicated by multiple interactions with major signaling pathways and tumor heterogeneity. Moreover, for a given tissue type, the specific role of each RUNX protein is distinct at different stages of differentiation. A regulatory function for RUNX in tissue stem cells points sharply to a causal effect in tumorigenesis. Understanding how RUNX dysregulation in cancer impinges on normal biological processes is important for identifying the molecular mechanisms that lead to malignancy. It will also indicate whether restoration of proper RUNX function to redirect cell fate is a feasible treatment for cancer. With the recent advances in RUNX research, it is time to revisit the many mechanisms/pathways that RUNX engage to regulate cell fate and decide whether cells proliferate, differentiate or die.
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Affiliation(s)
- Linda Shyue Huey Chuang
- Cancer Science Institute of Singapore, Center for Translational Medicine, National University of Singapore, 14 Medical Drive #12-01, Singapore, 117599, Singapore
| | - Kosei Ito
- Graduate School of Biomedical Sciences, Nagasaki University, 1-7-1 Sakamoto, Nagasaki, 852-8588, Japan
| | - Yoshiaki Ito
- Cancer Science Institute of Singapore, Center for Translational Medicine, National University of Singapore, 14 Medical Drive #12-01, Singapore, 117599, Singapore.
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Abstract
RUNX1 is a member of the core-binding factor family of transcription factors and is indispensable for the establishment of definitive hematopoiesis in vertebrates. RUNX1 is one of the most frequently mutated genes in a variety of hematological malignancies. Germ line mutations in RUNX1 cause familial platelet disorder with associated myeloid malignancies. Somatic mutations and chromosomal rearrangements involving RUNX1 are frequently observed in myelodysplastic syndrome and leukemias of myeloid and lymphoid lineages, that is, acute myeloid leukemia, acute lymphoblastic leukemia, and chronic myelomonocytic leukemia. More recent studies suggest that the wild-type RUNX1 is required for growth and survival of certain types of leukemia cells. The purpose of this review is to discuss the current status of our understanding about the role of RUNX1 in hematological malignancies.
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Ko A, Han SY, Song J. Dynamics of ARF regulation that control senescence and cancer. BMB Rep 2017; 49:598-606. [PMID: 27470213 PMCID: PMC5346319 DOI: 10.5483/bmbrep.2016.49.11.120] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Indexed: 12/16/2022] Open
Abstract
ARF is an alternative reading frame product of the INK4a/ARF locus, inactivated in numerous human cancers. ARF is a key regulator of cellular senescence, an irreversible cell growth arrest that suppresses tumor cell growth. It functions by sequestering MDM2 (a p53 E3 ligase) in the nucleolus, thus activating p53. Besides MDM2, ARF has numerous other interacting partners that induce either cellular senescence or apoptosis in a p53-independent manner. This further complicates the dynamics of the ARF network. Expression of ARF is frequently disrupted in human cancers, mainly due to epigenetic and transcriptional regulation. Vigorous studies on various transcription factors that either positively or negatively regulate ARF transcription have been carried out. However, recent focus on posttranslational modifications, particularly ubiquitination, indicates wider dynamic controls of ARF than previously known. In this review, we discuss the role and dynamic regulation of ARF in senescence and cancer.
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Affiliation(s)
- Aram Ko
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul 03722, Korea
| | - Su Yeon Han
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul 03722, Korea
| | - Jaewhan Song
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul 03722, Korea
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Runx Family Genes in Tissue Stem Cell Dynamics. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 962:117-138. [PMID: 28299655 DOI: 10.1007/978-981-10-3233-2_9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The Runx family genes play important roles in development and cancer, largely via their regulation of tissue stem cell behavior. Their involvement in two organs, blood and skin, is well documented. This review summarizes currently known Runx functions in the stem cells of these tissues. The fundamental core mechanism(s) mediated by Runx proteins has been sought; however, it appears that there does not exist one single common machinery that governs both tissue stem cells. Instead, Runx family genes employ multiple spatiotemporal mechanisms in regulating individual tissue stem cell populations. Such specific Runx requirements have been unveiled by a series of cell type-, developmental stage- or age-specific gene targeting studies in mice. Observations from these experiments revealed that the regulation of stem cells by Runx family genes turned out to be far more complex than previously thought. For instance, although it has been reported that Runx1 is required for the endothelial-to-hematopoietic cell transition (EHT) but not thereafter, recent studies clearly demonstrated that Runx1 is also needed during the period subsequent to EHT, namely at perinatal stage. In addition, Runx1 ablation in the embryonic skin mesenchyme eventually leads to complete loss of hair follicle stem cells (HFSCs) in the adult epithelium, suggesting that Runx1 facilitates the specification of skin epithelial stem cells in a cell extrinsic manner. Further in-depth investigation into how Runx family genes are involved in stem cell regulation is warranted.
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Lee SH, Manandhar S, Lee YM. Roles of RUNX in Hypoxia-Induced Responses and Angiogenesis. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 962:449-469. [PMID: 28299673 DOI: 10.1007/978-981-10-3233-2_27] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
During the past two decades, Runt domain transcription factors (RUNX1, 2, and 3) have been investigated in regard to their function, structural elements, genetic variants, and roles in normal development and pathological conditions. The Runt family proteins are evolutionarily conserved from Drosophila to mammals, emphasizing their physiological importance. A hypoxic microenvironment caused by insufficient blood supply is frequently observed in developing organs, growing tumors, and tissues that become ischemic due to impairment or blockage of blood vessels. During embryonic development and tumor growth, hypoxia triggers a stress response that overcomes low-oxygen conditions by increasing erythropoiesis and angiogenesis and triggering metabolic changes. This review briefly introduces hypoxic conditions and cellular responses, as well as angiogenesis and its related signaling pathways, and then describes our current knowledge on the functions and molecular mechanisms of Runx family proteins in hypoxic responses, especially in angiogenesis.
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Affiliation(s)
- Sun Hee Lee
- National Basic Research Laboratory of Vascular Homeostasis Regulation, BK21 Plus KNU Multi-Omics based Creative Drug Research Team, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Kyungpook National University, Daegu, 41566, South Korea
| | - Sarala Manandhar
- National Basic Research Laboratory of Vascular Homeostasis Regulation, BK21 Plus KNU Multi-Omics based Creative Drug Research Team, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Kyungpook National University, Daegu, 41566, South Korea
| | - You Mie Lee
- National Basic Research Laboratory of Vascular Homeostasis Regulation, BK21 Plus KNU Multi-Omics based Creative Drug Research Team, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Kyungpook National University, Daegu, 41566, South Korea.
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30
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Neil JC, Gilroy K, Borland G, Hay J, Terry A, Kilbey A. The RUNX Genes as Conditional Oncogenes: Insights from Retroviral Targeting and Mouse Models. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 962:247-264. [PMID: 28299662 DOI: 10.1007/978-981-10-3233-2_16] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The observation that the Runx genes act as targets for transcriptional activation by retroviral insertion identified a new family of dominant oncogenes. However, it is now clear that Runx genes are 'conditional' oncogenes whose over-expression is growth inhibitory unless accompanied by another event such as concomitant over-expression of MYC or loss of p53 function. Remarkably, while the oncogenic activities of either MYC or RUNX over-expression are suppressed while p53 is intact, the combination of both neutralises p53 tumour suppression in vivo by as yet unknown mechanisms. Moreover, there is emerging evidence that endogenous, basal RUNX activity is important to maintain the viability and proliferation of MYC-driven lymphoma cells. There is also growing evidence that the human RUNX genes play a similar conditional oncogenic role and are selected for over-expression in end-stage cancers of multiple types. Paradoxically, reduced RUNX activity can also predispose to cell immortalisation and transformation, particularly by mutant Ras. These apparently conflicting observations may be reconciled in a stage-specific model of RUNX involvement in cancer. A question that has yet to be fully addressed is the extent to which the three Runx genes are functionally redundant in cancer promotion and suppression.
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Affiliation(s)
- James C Neil
- Molecular Oncology Laboratory, Centre for Virus Research, University of Glasgow, Bearsden, Glasgow, G61 1QH, UK.
| | - Kathryn Gilroy
- Molecular Oncology Laboratory, Centre for Virus Research, University of Glasgow, Bearsden, Glasgow, G61 1QH, UK
| | - Gillian Borland
- Molecular Oncology Laboratory, Centre for Virus Research, University of Glasgow, Bearsden, Glasgow, G61 1QH, UK
| | - Jodie Hay
- Molecular Oncology Laboratory, Centre for Virus Research, University of Glasgow, Bearsden, Glasgow, G61 1QH, UK
| | - Anne Terry
- Molecular Oncology Laboratory, Centre for Virus Research, University of Glasgow, Bearsden, Glasgow, G61 1QH, UK
| | - Anna Kilbey
- Molecular Oncology Laboratory, Centre for Virus Research, University of Glasgow, Bearsden, Glasgow, G61 1QH, UK
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Honokiol induces proteasomal degradation of AML1-ETO oncoprotein via increasing ubiquitin conjugase UbcH8 expression in leukemia. Biochem Pharmacol 2016; 128:12-25. [PMID: 28043811 DOI: 10.1016/j.bcp.2016.12.022] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Accepted: 12/28/2016] [Indexed: 01/09/2023]
Abstract
AML1-ETO is the most common oncoprotein leading to acute myeloid leukemia (AML), in which 5-year survival rate is only about 30%. However, currently there are no specific therapies for AML patients with AML1-ETO. Here, we report that AML1-ETO protein is rapidly degraded by Honokiol (HNK), a natural phenolic compound isolated from the plant Magnolia officinalis. HNK induced the degradation of AML1-ETO in a concentration- and time-dependent manner in leukemic cell lines and primary AML blasts with t(8;21) translocation. Mechanistically, HNK obviously increased the expression of UbcH8, an E2-conjugase for the degradation of AML1-ETO, through triggering accumulation of acetylated histones in the promoter region of UbcH8. Knockdown of UbcH8 by small hairpin RNAs (shRNAs) prevented HNK-induced degradation of AML-ETO, suggesting that UbcH8 plays a critical role in the degradation of AML1-ETO. HNK inhibited cell proliferation and induced apoptotic death without activation of caspase-3, which was reported to cleave and degrade AML1-ETO protein. Thus, HNK-induced degradation of AML1-ETO is independent of activation of caspase-3. Finally, HNK reduced the angiogenesis and migration in Kasumi-1-injected zebrafish, decreased xenograft tumor size in a xenograft leukemia mouse model, and prolonged the survival time in mouse C1498 AML model. Collectively, HNK might be a potential treatment for t(8;21) leukemia by targeting AML1-ETO oncoprotein.
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32
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New insights into transcriptional and leukemogenic mechanisms of AML1-ETO and E2A fusion proteins. ACTA ACUST UNITED AC 2016; 11:285-304. [PMID: 28261265 DOI: 10.1007/s11515-016-1415-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
BACKGROUND Nearly 15% of acute myeloid leukemia (AML) cases are caused by aberrant expression of AML1-ETO, a fusion protein generated by the t(8;21) chromosomal translocation. Since its discovery, AML1-ETO has served as a prototype to understand how leukemia fusion proteins deregulate transcription to promote leukemogenesis. Another leukemia fusion protein, E2A-Pbx1, generated by the t(1;19) translocation, is involved in acute lymphoblastic leukemias (ALLs). While AML1-ETO and E2A-Pbx1 are structurally unrelated fusion proteins, we have recently shown that a common axis, the ETO/E-protein interaction, is involved in the regulation of both fusion proteins, underscoring the importance of studying protein-protein interactions in elucidating the mechanisms of leukemia fusion proteins. OBJECTIVE In this review, we aim to summarize these new developments while also providing a historic overview of the related early studies. METHODS A total of 218 publications were reviewed in this article, a majority of which were published after 2004.We also downloaded 3D structures of AML1-ETO domains from Protein Data Bank and provided a systematic summary of their structures. RESULTS By reviewing the literature, we summarized early and recent findings on AML1-ETO, including its protein-protein interactions, transcriptional and leukemogenic mechanisms, as well as the recently reported involvement of ETO family corepressors in regulating the function of E2A-Pbx1. CONCLUSION While the recent development in genomic and structural studies has clearly demonstrated that the fusion proteins function by directly regulating transcription, a further understanding of the underlying mechanisms, including crosstalk with other transcription factors and cofactors, and the protein-protein interactions in the context of native proteins, may be necessary for the development of highly targeted drugs for leukemia therapy.
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Hu G, Mallik DK, Yang W, Hou Y, Cheng Z, Chen P, Zhu W, Wang H, Shen L, Zhang H, Yang Z. Appropriate Clinical Strategies for Breast Cancer Coexisting with Acute Myeloid Leukemia in the Genomic-Molecular Era: A Case Report. Breast Care (Basel) 2016; 11:145-7. [PMID: 27239178 DOI: 10.1159/000443494] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
BACKGROUND The coexistence of breast cancer (BC) and acute myeloid leukemia (AML) has rarely been reported. Considering the fatality of AML, the management of this condition is based on treating the AML immediately while putting BC treatment on hold. CASE REPORT Here, we report a synchronous occurrence of BC and AML. Prognostic factors for both BC and AML were determined by genomic and molecular evaluation. The evaluation for AML showed a relatively good prognosis, and we simultaneously conducted treatment for AML and BC. The patient has survived for more than 3 years, which makes this the case with the longest survival reported. CONCLUSION In patients with BC and AML, it is essential to determine the prognosis through a genomic and molecular evaluation. For a certain group of patients whose prognosis of AML is good, simultaneous or initial treatment of BC before treatment of AML may be appropriate.
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Affiliation(s)
- Guangfu Hu
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Dipendra K Mallik
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Weige Yang
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Yingyong Hou
- Department of Pathology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Zhixiang Cheng
- Hematological Department, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Pu Chen
- Hematological Department, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Wei Zhu
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Hong Wang
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Lei Shen
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Hongwei Zhang
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Ziang Yang
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
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Cheng CK, Chan NPH, Wan TSK, Lam LY, Cheung CHY, Wong THY, Ip RKL, Wong RSM, Ng MHL. Helicase-like transcription factor is a RUNX1 target whose downregulation promotes genomic instability and correlates with complex cytogenetic features in acute myeloid leukemia. Haematologica 2016; 101:448-57. [PMID: 26802049 DOI: 10.3324/haematol.2015.137125] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2015] [Accepted: 01/13/2016] [Indexed: 12/27/2022] Open
Abstract
Helicase-like transcription factor is a SWI/SNF chromatin remodeling factor involved in various biological processes. However, little is known about its role in hematopoiesis. In this study, we measured helicase-like transcription factor mRNA expression in the bone marrow of 204 adult patients with de novo acute myeloid leukemia. Patients were dichotomized into low and high expression groups at the median level for clinicopathological correlations. Helicase-like transcription factor levels were dramatically reduced in the low expression patient group compared to those in the normal controls (n=40) (P<0.0001). Low helicase-like transcription factor expression correlated positively with French-American-British M4/M5 subtypes (P<0.0001) and complex cytogenetic abnormalities (P=0.02 for ≥3 abnormalities;P=0.004 for ≥5 abnormalities) but negatively with CEBPA double mutations (P=0.012). Also, low expression correlated with poorer overall (P=0.005) and event-free (P=0.006) survival in the intermediate-risk cytogenetic subgroup. Consistent with the more aggressive disease associated with low expression, helicase-like transcription factor knockdown in leukemic cells promoted proliferation and chromosomal instability that was accompanied by downregulation of mitotic regulators and impaired DNA damage response. The significance of helicase-like transcription factor in genome maintenance was further indicated by its markedly elevated expression in normal human CD34(+)hematopoietic stem cells. We further demonstrated that helicase-like transcription factor was a RUNX1 target and transcriptionally repressed by RUNX1-ETO and site-specific DNA methylation through a duplicated RUNX1 binding site in its promoter. Taken together, our findings provide new mechanistic insights on genomic instability linked to helicase-like transcription factor deregulation, and strongly suggest a tumor suppressor function of the SWI/SNF protein in acute myeloid leukemia.
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Affiliation(s)
- Chi Keung Cheng
- Department of Anatomical and Cellular Pathology, Prince of Wales Hospital, The Chinese University of Hong Kong, Cina
| | - Natalie P H Chan
- Department of Anatomical and Cellular Pathology, Prince of Wales Hospital, The Chinese University of Hong Kong, Cina
| | - Thomas S K Wan
- Department of Anatomical and Cellular Pathology, Prince of Wales Hospital, The Chinese University of Hong Kong, Cina
| | - Lai Ying Lam
- Department of Anatomical and Cellular Pathology, Prince of Wales Hospital, The Chinese University of Hong Kong, Cina
| | - Coty H Y Cheung
- Department of Anatomical and Cellular Pathology, Prince of Wales Hospital, The Chinese University of Hong Kong, Cina
| | - Terry H Y Wong
- Department of Anatomical and Cellular Pathology, Prince of Wales Hospital, The Chinese University of Hong Kong, Cina
| | - Rosalina K L Ip
- Department of Anatomical and Cellular Pathology, Prince of Wales Hospital, The Chinese University of Hong Kong, Cina
| | - Raymond S M Wong
- Department of Medicine and Therapeutics, Prince of Wales Hospital, The Chinese University of Hong Kong, Cina Sir Y. K. Pao Centre for Cancer, Prince of Wales Hospital, Hong Kong, Cina
| | - Margaret H L Ng
- Department of Anatomical and Cellular Pathology, Prince of Wales Hospital, The Chinese University of Hong Kong, Cina State Key Laboratory in Oncology in South China, The Chinese University of Hong Kong, Cina
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Yoon S, Eom GH. HDAC and HDAC Inhibitor: From Cancer to Cardiovascular Diseases. Chonnam Med J 2016; 52:1-11. [PMID: 26865995 PMCID: PMC4742605 DOI: 10.4068/cmj.2016.52.1.1] [Citation(s) in RCA: 303] [Impact Index Per Article: 37.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2015] [Revised: 11/27/2015] [Accepted: 12/01/2015] [Indexed: 01/15/2023] Open
Abstract
Histone deacetylases (HDACs) are epigenetic regulators that regulate the histone tail, chromatin conformation, protein-DNA interaction, and even transcription. HDACs are also post-transcriptional modifiers that regulate the protein acetylation implicated in several pathophysiologic states. HDAC inhibitors have been highlighted as a novel category of anti-cancer drugs. To date, four HDAC inhibitors, Vorinostat, Romidepsin, Panobinostat, and Belinostat, have been approved by the United States Food and Drug Administration. Principally, these HDAC inhibitors are used for hematologic cancers in clinic with less severe side effects. Clinical trials are continuously expanding to address other types of cancer and also nonmalignant diseases. HDAC inhibition also results in beneficial outcomes in various types of neurodegenerative diseases, inflammation disorders, and cardiovascular diseases. In this review, we will briefly discuss 1) the roles of HDACs in the acquisition of a cancer's phenotype and the general outcome of the HDAC inhibitors in cancer, 2) the functional relevance of HDACs in cardiovascular diseases and the possible therapeutic implications of HDAC inhibitors in cardiovascular disease.
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Affiliation(s)
- Somy Yoon
- Department of Pharmacology, Chonnam National University Medical School, Gwangju, Korea
| | - Gwang Hyeon Eom
- Department of Pharmacology, Chonnam National University Medical School, Gwangju, Korea
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Rajendran P, Dashwood WM, Li L, Kang Y, Kim E, Johnson G, Fischer KA, Löhr CV, Williams DE, Ho E, Yamamoto M, Lieberman DA, Dashwood RH. Nrf2 status affects tumor growth, HDAC3 gene promoter associations, and the response to sulforaphane in the colon. Clin Epigenetics 2015; 7:102. [PMID: 26388957 PMCID: PMC4575421 DOI: 10.1186/s13148-015-0132-y] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Accepted: 09/02/2015] [Indexed: 02/08/2023] Open
Abstract
Background The dietary agent sulforaphane (SFN) has been reported to induce nuclear factor erythroid 2 (NF-E2)-related factor 2 (Nrf2)-dependent pathways as well as inhibiting histone deacetylase (HDAC) activity. The current investigation sought to examine the relationships between Nrf2 status and HDAC expression in preclinical and translational studies. Results Wild type (WT) and Nrf2-deficient (Nrf2−/+) mice were treated with the colon carcinogen 1,2-dimethylhydrazine (DMH) followed by 400 ppm SFN in the diet (n = 35 mice/group). WT mice were more susceptible than Nrf2−/+ mice to tumor induction in the colon. Tumors from WT mice had higher HDAC levels globally and locally on genes such as cyclin-dependant kinase inhibitor 2a (Cdkn2a/p16) that were dysregulated during tumor development. The average tumor burden was reduced by SFN from 62.7 to 26.0 mm3 in WT mice and from 14.6 to 11.7 mm3 in Nrf2−/+ mice. The decreased antitumor activity of SFN in Nrf2−/+ mice coincided with attenuated Cdkn2a promoter interactions involving HDAC3. HDAC3 knockdown in human colon cancer cells recapitulated the effects of SFN on p16 induction. Human subjects given a broccoli sprout extract supplement (200 μmol SFN equivalents), or reporting more than five cruciferous vegetable servings per week, had increased p16 expression that was inversely associated with HDAC3 in circulating peripheral blood mononuclear cells (PBMCs) and in biopsies obtained during screening colonoscopy. Conclusions Nrf2 expression varies widely in both normal human colon and human colon cancers and likely contributes to the overall rate of tumor growth in the large intestine. It remains to be determined whether this influences global HDAC protein expression levels, as well as local HDAC interactions on genes dysregulated during human colon tumor development. If corroborated in future studies, Nrf2 status might serve as a biomarker of HDAC inhibitor efficacy in clinical trials using single agent or combination modalities to slow, halt, or regress the progression to later stages of solid tumors and hematological malignancies. Electronic supplementary material The online version of this article (doi:10.1186/s13148-015-0132-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Praveen Rajendran
- Center for Epigenetics & Disease Prevention, Texas A&M Health Science Center, Houston, TX USA
| | - Wan-Mohaiza Dashwood
- Center for Epigenetics & Disease Prevention, Texas A&M Health Science Center, Houston, TX USA
| | - Li Li
- Center for Epigenetics & Disease Prevention, Texas A&M Health Science Center, Houston, TX USA
| | - Yuki Kang
- Linus Pauling Institute, Oregon State University, Corvallis, OR USA
| | - Eunah Kim
- Center for Epigenetics & Disease Prevention, Texas A&M Health Science Center, Houston, TX USA
| | - Gavin Johnson
- Center for Epigenetics & Disease Prevention, Texas A&M Health Science Center, Houston, TX USA
| | - Kay A Fischer
- College of Veterinary Medicine, Oregon State University, Corvallis, OR USA
| | - Christiane V Löhr
- College of Veterinary Medicine, Oregon State University, Corvallis, OR USA
| | - David E Williams
- Linus Pauling Institute, Oregon State University, Corvallis, OR USA ; Department of Environmental and Molecular Toxicology, Oregon State University, Corvallis, OR USA
| | - Emily Ho
- Linus Pauling Institute, Oregon State University, Corvallis, OR USA ; College of Public Health and Human Sciences, Oregon State University, Corvallis, OR USA
| | - Masayuki Yamamoto
- Division of Medical Biochemistry, Tohoku University Graduate School of Medicine, Sendai, Miyagi Japan
| | - David A Lieberman
- Department of Medicine, Oregon Health & Science University, Portland, OR USA
| | - Roderick H Dashwood
- Center for Epigenetics & Disease Prevention, Texas A&M Health Science Center, Houston, TX USA ; Department of Food Science & Nutrition, Texas A&M University, College Station, TX USA ; Department of Molecular & Cellular Medicine, Texas A&M University, College Station, TX USA ; Department of Clinical Cancer Prevention, MD Anderson Cancer Center, Houston, TX USA
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Tschan MP, Federzoni EA, Haimovici A, Britschgi C, Moser BA, Jin J, Reddy VA, Sheeter DA, Fischer KM, Sun P, Torbett BE. Human DMTF1β antagonizes DMTF1α regulation of the p14(ARF) tumor suppressor and promotes cellular proliferation. BIOCHIMICA ET BIOPHYSICA ACTA-GENE REGULATORY MECHANISMS 2015; 1849:1198-208. [PMID: 26187004 DOI: 10.1016/j.bbagrm.2015.07.009] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Revised: 07/09/2015] [Accepted: 07/13/2015] [Indexed: 11/18/2022]
Abstract
The human DMTF1 (DMP1) transcription factor, a DNA binding protein that interacts with cyclin D, is a positive regulator of the p14ARF (ARF) tumor suppressor. Our earlier studies have shown that three differentially spliced human DMP1 mRNAs, α, β and γ, arise from the human gene. We now show that DMP1α, β and γ isoforms differentially regulate ARF expression and promote distinct cellular functions. In contrast to DMP1α, DMP1β and γ did not activate the ARF promoter, whereas only β resulted in a dose-dependent inhibition of DMP1α-induced transactivation of the ARF promoter. Ectopic expression of DMP1β reduced endogenous ARF mRNA levels in human fibroblasts. The DMP1β- and γ-isoforms share domains necessary for the inhibitory function of the β-isoform. That DMP1β may interact with DMP1α to antagonize its function was shown in DNA binding assays and in cells by the close proximity of DMP1α/β in the nucleus. Cells stably expressing DMP1β, as well as shRNA targeting all DMP1 isoforms, disrupted cellular growth arrest induced by serum deprivation or in PMA-derived macrophages in the presence or absence of cellular p53. DMP1 mRNA levels in acute myeloid leukemia samples, as compared to granulocytes, were reduced. Treatment of acute promyelocytic leukemia patient samples with all-trans retinoic acid promoted differentiation to granulocytes and restored DMP1 transcripts to normal granulocyte levels. Our findings imply that DMP1α- and β-ratios are tightly regulated in hematopoietic cells and DMP1β antagonizes DMP1α transcriptional regulation of ARF resulting in the alteration of cellular control with a gain in proliferation.
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Affiliation(s)
- Mario P Tschan
- Department of Molecular and Experimental Medicine, La Jolla, CA 92037, USA; Division of Experimental Pathology, Institute of Pathology, University of Bern, Bern CH-3010, Switzerland
| | - Elena A Federzoni
- Department of Molecular and Experimental Medicine, La Jolla, CA 92037, USA
| | - Aladin Haimovici
- Division of Experimental Pathology, Institute of Pathology, University of Bern, Bern CH-3010, Switzerland
| | | | - Bettina A Moser
- Department of Biochemistry and Molecular Genetics, University of Illinois at Chicago, Chicago, IL 60607, USA
| | - Jing Jin
- Division of Experimental Pathology, Institute of Pathology, University of Bern, Bern CH-3010, Switzerland
| | | | - Dennis A Sheeter
- Department of Molecular and Experimental Medicine, La Jolla, CA 92037, USA
| | | | - Peiqing Sun
- Cell and Molecular Biology, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Bruce E Torbett
- Department of Molecular and Experimental Medicine, La Jolla, CA 92037, USA.
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38
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Gao XN, Yan F, Lin J, Gao L, Lu XL, Wei SC, Shen N, Pang JX, Ning QY, Komeno Y, Deng AL, Xu YH, Shi JL, Li YH, Zhang DE, Nervi C, Liu SJ, Yu L. AML1/ETO cooperates with HIF1α to promote leukemogenesis through DNMT3a transactivation. Leukemia 2015; 29:1730-40. [PMID: 25727291 DOI: 10.1038/leu.2015.56] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2014] [Revised: 02/16/2015] [Accepted: 02/23/2015] [Indexed: 12/27/2022]
Abstract
The mechanisms by which AML1/ETO (A/E) fusion protein induces leukemogenesis in acute myeloid leukemia (AML) without mutagenic events remain elusive. Here we show that interactions between A/E and hypoxia-inducible factor 1α (HIF1α) are sufficient to prime leukemia cells for subsequent aggressive growth. In agreement with this, HIF1α is highly expressed in A/E-positive AML patients and strongly predicts inferior outcomes, regardless of gene mutations. Co-expression of A/E and HIF1α in leukemia cells causes a higher cell proliferation rate in vitro and more serious leukemic status in mice. Mechanistically, A/E and HIF1α form a positive regulatory circuit and cooperate to transactivate DNMT3a gene leading to DNA hypermethylation. Pharmacological or genetic interventions in the A/E-HIF1α loop results in DNA hypomethylation, a re-expression of hypermethylated tumor-suppressor p15(INK4b) and the blockage of leukemia growth. Thus high HIF1α expression serves as a reliable marker, which identifies patients with a poor prognosis in an otherwise prognostically favorable AML group and represents an innovative therapeutic target in high-risk A/E-driven leukemia.
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Affiliation(s)
- X N Gao
- 1] Department of Hematology, Chinese PLA General Hospital, Medical School of Chinese PLA, Beijing, China [2] The Hormel Institute, University of Minnesota, Austin, MN, USA
| | - F Yan
- The Hormel Institute, University of Minnesota, Austin, MN, USA
| | - J Lin
- Institute of Basic Medicine, Chinese PLA General Hospital, Medical School of Chinese PLA, Beijing, China
| | - L Gao
- Department of Hematology, Chinese PLA General Hospital, Medical School of Chinese PLA, Beijing, China
| | - X L Lu
- Department of Hematology, Chinese PLA General Hospital, Medical School of Chinese PLA, Beijing, China
| | - S C Wei
- The Hormel Institute, University of Minnesota, Austin, MN, USA
| | - N Shen
- The Hormel Institute, University of Minnesota, Austin, MN, USA
| | - J X Pang
- The Hormel Institute, University of Minnesota, Austin, MN, USA
| | - Q Y Ning
- Department of Hematology, Chinese PLA General Hospital, Medical School of Chinese PLA, Beijing, China
| | - Y Komeno
- Department of Pathology and Division of Biological Sciences, Moores UCSD Cancer Center, University of California San Diego, La Jolla, CA, USA
| | - A L Deng
- Department of Hematology, Chinese PLA General Hospital, Medical School of Chinese PLA, Beijing, China
| | - Y H Xu
- Department of Hematology, Chinese PLA General Hospital, Medical School of Chinese PLA, Beijing, China
| | - J L Shi
- Department of Hematology, Chinese PLA General Hospital, Medical School of Chinese PLA, Beijing, China
| | - Y H Li
- Department of Hematology, Chinese PLA General Hospital, Medical School of Chinese PLA, Beijing, China
| | - D E Zhang
- Department of Pathology and Division of Biological Sciences, Moores UCSD Cancer Center, University of California San Diego, La Jolla, CA, USA
| | - C Nervi
- Department of Medical Surgical Sciences and Biotechnologies, University of Rome 'La Sapienza', Latina, Italy
| | - S J Liu
- The Hormel Institute, University of Minnesota, Austin, MN, USA
| | - L Yu
- Department of Hematology, Chinese PLA General Hospital, Medical School of Chinese PLA, Beijing, China
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39
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Schönheit J, Leutz A, Rosenbauer F. Chromatin Dynamics during Differentiation of Myeloid Cells. J Mol Biol 2015; 427:670-87. [DOI: 10.1016/j.jmb.2014.08.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2014] [Revised: 08/05/2014] [Accepted: 08/20/2014] [Indexed: 12/23/2022]
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Abstract
RUNX proteins belong to a family of metazoan transcription factors that serve as master regulators of development. They are frequently deregulated in human cancers, indicating a prominent and, at times, paradoxical role in cancer pathogenesis. The contextual cues that direct RUNX function represent a fast-growing field in cancer research and could provide insights that are applicable to early cancer detection and treatment. This Review describes how RUNX proteins communicate with key signalling pathways during the multistep progression to malignancy; in particular, we highlight the emerging partnership of RUNX with p53 in cancer suppression.
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Affiliation(s)
- Yoshiaki Ito
- 1] Cancer Science Institute of Singapore, National University of Singapore, Center for Translational Medicine, 14 Medical Drive #12-01, 117599, Singapore. [2]
| | - Suk-Chul Bae
- 1] Department of Biochemistry, School of Medicine, and Institute for Tumour Research, Chungbuk National University, Cheongju, 361763, South Korea. [2]
| | - Linda Shyue Huey Chuang
- 1] Cancer Science Institute of Singapore, National University of Singapore, Center for Translational Medicine, 14 Medical Drive #12-01, 117599, Singapore. [2]
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Esposito MT, So CWE. DNA damage accumulation and repair defects in acute myeloid leukemia: implications for pathogenesis, disease progression, and chemotherapy resistance. Chromosoma 2014; 123:545-61. [PMID: 25112726 DOI: 10.1007/s00412-014-0482-9] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2014] [Revised: 07/23/2014] [Accepted: 07/24/2014] [Indexed: 12/15/2022]
Abstract
DNA damage repair mechanisms are vital to maintain genomic integrity. Mutations in genes involved in the DNA damage response (DDR) can increase the risk of developing cancer. In recent years, a variety of polymorphisms in DDR genes have been associated with increased risk of developing acute myeloid leukemia (AML) or of disease relapse. Moreover, a growing body of literature has indicated that epigenetic silencing of DDR genes could contribute to the leukemogenic process. In addition, a variety of AML oncogenes have been shown to induce replication and oxidative stress leading to accumulation of DNA damage, which affects the balance between proliferation and differentiation. Conversely, upregulation of DDR genes can provide AML cells with escape mechanisms to the DDR anticancer barrier and induce chemotherapy resistance. The current review summarizes the DDR pathways in the context of AML and describes how aberrant DNA damage response can affect AML pathogenesis, disease progression, and resistance to standard chemotherapy, and how defects in DDR pathways may provide a new avenue for personalized therapeutic strategies in AML.
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Affiliation(s)
- Maria Teresa Esposito
- Leukemia and Stem Cell Biology Group, Department of Hematological Medicine, King's College London, Denmark Hill campus, SE5 9NU, London, UK
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42
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Wu K, Zhao XJ, Wong KW, Fan XY. Comparison of plasmid DNA versus PCR amplified gene of insert DNA for nucleofection in Kasumi-1 cells. Cytotechnology 2014; 67:275-83. [PMID: 24468832 DOI: 10.1007/s10616-013-9683-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2013] [Accepted: 12/23/2013] [Indexed: 01/08/2023] Open
Abstract
Plasmid electroporation, or its optimized version nucleofection, is an important technique for gene transfection of cells in suspension. However, substantial cell death and/or low transfection efficiency are still common for some cell lines. By using enhanced green fluorescent protein (EGFP) as a reporter, we compared the use of PCR amplified EGFP (PaEGFP) and its parental plasmid (pEGFP-N2) for nucleofection in Kasumi-1 cells. We found that PaEGFP induced significantly lower cell death but had similar transfection efficiency compared to its parent plasmid (pEGFP-N2). Most importantly, contrary to the pEGFP-N2-nucleofected cells, the PaEGFP-nucleofected cells subsequently grew properly. Tests in other cell lines also implied that PaEGFP indeed induced consistently less cell death, but transfection efficiencies varied, being good in suspension cell lines but lower in adhesive cell lines. We suggest that direct transfection with PCR amplified genes can be a simple and useful approach for optimization of electropulse-based transfection not only of Kasumi-1 cells, but also may be useful for other cell lines that are difficult to transfect in suspension.
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Affiliation(s)
- Kang Wu
- Key Laboratory of Medical Molecular Virology of MOE/MOH, Shanghai Public Health Clinical Center, Fudan University, 2901 Caolang Road, Shanghai, 201508, China
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Parbin S, Kar S, Shilpi A, Sengupta D, Deb M, Rath SK, Patra SK. Histone deacetylases: a saga of perturbed acetylation homeostasis in cancer. J Histochem Cytochem 2014; 62:11-33. [PMID: 24051359 PMCID: PMC3873803 DOI: 10.1369/0022155413506582] [Citation(s) in RCA: 99] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
In the current era of genomic medicine, diseases are identified as manifestations of anomalous patterns of gene expression. Cancer is the principal example among such maladies. Although remarkable progress has been achieved in the understanding of the molecular mechanisms involved in the genesis and progression of cancer, its epigenetic regulation, particularly histone deacetylation, demands further studies. Histone deacetylases (HDACs) are one of the key players in the gene expression regulation network in cancer because of their repressive role on tumor suppressor genes. Higher expression and function of deacetylases disrupt the finely tuned acetylation homeostasis in both histone and non-histone target proteins. This brings about alterations in the genes implicated in the regulation of cell proliferation, differentiation, apoptosis and other cellular processes. Moreover, the reversible nature of epigenetic modulation by HDACs makes them attractive targets for cancer remedy. This review summarizes the current knowledge of HDACs in tumorigenesis and tumor progression as well as their contribution to the hallmarks of cancer. The present report also describes briefly various assays to detect histone deacetylase activity and discusses the potential role of histone deacetylase inhibitors as emerging epigenetic drugs to cure cancer.
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Affiliation(s)
- Sabnam Parbin
- Department of Life Science, National Institute of Technology, Rourkela, Odisha, India (SP, SK, AS, DS, SKR, SKP)
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Lee YS, Lee JW, Jang JW, Chi XZ, Kim JH, Li YH, Kim MK, Kim DM, Choi BS, Kim EG, Chung JH, Lee OJ, Lee YM, Suh JW, Chuang LSH, Ito Y, Bae SC. Runx3 inactivation is a crucial early event in the development of lung adenocarcinoma. Cancer Cell 2013; 24:603-16. [PMID: 24229708 DOI: 10.1016/j.ccr.2013.10.003] [Citation(s) in RCA: 97] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2012] [Revised: 08/08/2013] [Accepted: 10/02/2013] [Indexed: 12/20/2022]
Abstract
Targeted inactivation of Runx3 in mouse lung induced mucinous and nonmucinous adenomas and markedly shortened latency of adenocarcinoma formation induced by oncogenic K-Ras. RUNX3 was frequently inactivated in K-RAS mutated human lung adenocarcinomas. A functional genetic screen of a fly mutant library and molecular analysis in cultured cell lines revealed that Runx3 forms a complex with BRD2 in a K-Ras-dependent manner in the early phase of the cell cycle; this complex induces expression of p14(ARF)/p19(Arf) and p21(WAF/CIP). When K-Ras was constitutively activated, the Runx3-BRD2 complex was stably maintained and expression of both p14(ARF) and p21(WAF/CIP) was prolonged. These results provide a missing link between oncogenic K-Ras and the p14(ARF)-p53 pathway, and may explain how cells defend against oncogenic K-Ras.
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Affiliation(s)
- You-Soub Lee
- Department of Biochemistry, College of Medicine, Chungbuk National University, Cheongju 361-763, South Korea
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RUNX Family Participates in the Regulation of p53-Dependent DNA Damage Response. Int J Genomics 2013; 2013:271347. [PMID: 24078903 PMCID: PMC3775453 DOI: 10.1155/2013/271347] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2013] [Accepted: 08/01/2013] [Indexed: 11/24/2022] Open
Abstract
A proper DNA damage response (DDR), which monitors and maintains the genomic integrity, has been considered to be a critical barrier against genetic alterations to prevent tumor
initiation and progression. The representative tumor suppressor p53 plays an important role in the regulation of DNA damage response. When cells receive DNA damage, p53 is quickly activated
and induces cell cycle arrest and/or apoptotic cell death through transactivating its target genes implicated in the promotion of cell cycle arrest and/or apoptotic cell death such as
p21WAF1, BAX, and PUMA. Accumulating evidence strongly suggests that DNA damage-mediated activation as well as induction of p53
is regulated by posttranslational modifications and also by protein-protein interaction. Loss of p53 activity confers growth advantage and ensures survival in cancer cells by inhibiting apoptotic
response required for tumor suppression. RUNX family, which is composed of RUNX1, RUNX2, and RUNX3, is a sequence-specific transcription factor and is closely involved in a
variety of cellular processes including development, differentiation, and/or tumorigenesis. In this review, we describe a background of p53 and a functional collaboration between
p53 and RUNX family in response to DNA damage.
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Tan X, Anzick SL, Khan SG, Ueda T, Stone G, Digiovanna JJ, Tamura D, Wattendorf D, Busch D, Brewer CC, Zalewski C, Butman JA, Griffith AJ, Meltzer PS, Kraemer KH. Chimeric negative regulation of p14ARF and TBX1 by a t(9;22) translocation associated with melanoma, deafness, and DNA repair deficiency. Hum Mutat 2013; 34:1250-9. [PMID: 23661601 DOI: 10.1002/humu.22354] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2013] [Accepted: 04/29/2013] [Indexed: 12/15/2022]
Abstract
Melanoma is the most deadly form of skin cancer and DiGeorge syndrome (DGS) is the most frequent interstitial deletion syndrome. We characterized a novel balanced t(9;22)(p21;q11.2) translocation in a patient with melanoma, DNA repair deficiency, and features of DGS including deafness and malformed inner ears. Using chromosome sorting, we located the 9p21 breakpoint in CDKN2A intron 1. This resulted in underexpression of the tumor suppressor p14 alternate reading frame (p14ARF); the reduced DNA repair was corrected by transfection with p14ARF. Ultraviolet radiation-type p14ARF mutations in his melanoma implicated p14ARF in its pathogenesis. The 22q11.2 breakpoint was located in a palindromic AT-rich repeat (PATRR22). We identified a new gene, FAM230A, that contains PATRR22 within an intron. The 22q11.2 breakpoint was located 800 kb centromeric to TBX1, which is required for inner ear development. TBX1 expression was greatly reduced. The translocation resulted in a chimeric transcript encoding portions of p14ARF and FAM230A. Inhibition of chimeric p14ARF-FAM230A expression increased p14ARF and TBX1 expression and improved DNA repair. Expression of the chimera in normal cells produced dominant negative inhibition of p14ARF. Similar chimeric mRNAs may mediate haploinsufficiency in DGS or dominant negative inhibition of other genes such as those involved in melanoma.
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Affiliation(s)
- Xiaohui Tan
- DNA Repair Section, Dermatology Branch, Center for Cancer Research, National Cancer Institute, Bethesda, Maryland 20892-4258, USA
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47
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Zhuang WY, Cen JN, Zhao Y, Chen ZX. Epigenetic silencing of Bcl-2, CEBPA and p14(ARF) by the AML1-ETO oncoprotein contributing to growth arrest and differentiation block in the U937 cell line. Oncol Rep 2013; 30:185-92. [PMID: 23673926 DOI: 10.3892/or.2013.2459] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2013] [Accepted: 04/05/2013] [Indexed: 11/06/2022] Open
Abstract
The AML1-ETO fusion transcription factor generated by the t(8;21) translocation is considered to deregulate the expression of genes that are crucial for normal differentiation and proliferation of hematopoietic progenitors, resulting in acute myelogenous leukemia by recruiting co-repressor complexes to DNA. To investigate the role of AML1-ETO in leukemogenesis, we transfected the cloned AML1-ETO cDNA and expressed the AML1-ETO protein in U937 myelomonocytic leukemia cells. By focusing on the anti-apoptotic gene Bcl-2, the key regulator gene of granulocytic differentiation CCAAT/enhancer-binding protein α (CEBPA) and the tumor suppressor gene p14(ARF), we found that both AML1-ETO-expressing cell lines and t(8;21) leukemia samples displayed low levels of these three genes. Chromatin immunoprecipitation assays demonstrated that Bcl-2, CEBPA and p14(ARF) were direct transcriptional targets of AML1-ETO. The universal binding of AML1-ETO to genomic DNA resulted in recruitment of methyl-CpG binding protein 2 (MeCP2), reduction of histone H3 or H4 acetylation and increased trimethylation of histone H3 lysine 9 as well as lysine 27 indicating that AML1-ETO induced heterochromatic silencing of Bcl-2, CEBPA and p14(ARF). These results suggested that the aberrant transcription factor AML1-ETO epigenetically silenced the function of the Bcl-2, CEBPA and p14(ARF) genes by inducing repressed chromatin configurations at their promoters through histone modifications.
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Affiliation(s)
- Wen-Yue Zhuang
- The First Affiliated Hospital, Soochow University, Jiangsu Institute of Hematology, Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Suzhou, Jiangsu, P.R. China
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Keita M, Bachvarova M, Morin C, Plante M, Gregoire J, Renaud MC, Sebastianelli A, Trinh XB, Bachvarov D. The RUNX1 transcription factor is expressed in serous epithelial ovarian carcinoma and contributes to cell proliferation, migration and invasion. Cell Cycle 2013; 12:972-86. [PMID: 23442798 DOI: 10.4161/cc.23963] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Previously, we have identified the RUNX1 gene as hypomethylated and overexpressed in post-chemotherapy (CT) primary cultures derived from epithelial ovarian cancer (EOC) patients, when compared with primary cultures derived from matched primary (prior to CT) tumors. Here we show that RUNX1 displays a trend of hypomethylation, although not significant, in omental metastases compared with primary EOC tumors. Surprisingly, RUNX1 displayed significantly higher expression not only in metastatic tissue, but also in high-grade primary tumors and even in low malignant potential tumors. The RUNX1 expression levels were almost identical in primary tumors and omental metastases, suggesting that RUNX1 hypomethylation might have a limited impact on its overexpression in advanced (metastatic) stage of the disease. Knockdown of the RUNX1 expression in EOC cells led to sharp decrease of cell proliferation and induced G 1 cell cycle arrest. Moreover, RUNX1 suppression significantly inhibited EOC cell migration and invasion. Gene expression profiling and consecutive network and pathway analyses confirmed these findings, as numerous genes and pathways known previously to be implicated in ovarian tumorigenesis, including EOC tumor invasion and metastasis, were found to be downregulated upon RUNX1 suppression, while a number of pro-apoptotic genes and some EOC tumor suppressor genes were induced. Taken together, our data are indicative for a strong oncogenic potential of the RUNX1 gene in EOC progression and suggest that RUNX1 might be a novel EOC therapeutic target. Further studies are needed to more completely elucidate the functional implications of RUNX1 and other members of the RUNX gene family in ovarian tumorigenesis.
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Affiliation(s)
- Mamadou Keita
- Department of Molecular Medicine, Laval University, Québec, QC, Canada
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49
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Gao XN, Lin J, Ning QY, Gao L, Yao YS, Zhou JH, Li YH, Wang LL, Yu L. A histone acetyltransferase p300 inhibitor C646 induces cell cycle arrest and apoptosis selectively in AML1-ETO-positive AML cells. PLoS One 2013; 8:e55481. [PMID: 23390536 PMCID: PMC3563640 DOI: 10.1371/journal.pone.0055481] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2012] [Accepted: 12/24/2012] [Indexed: 11/30/2022] Open
Abstract
AML1-ETO fusion protein (AE) is generated by t(8;21)(q22;q22) chromosomal translocation, which is one of the most frequently observed structural abnormalities in acute myeloid leukemia (AML) and displays a pivotal role in leukemogenesis. The histone acetyltransferase p300 promotes self-renewal of leukemia cells by acetylating AE and facilitating its downstream gene expression as a transcriptional coactivator, suggesting that p300 may be a potential therapeutic target for AE-positive AML. However, the effects of p300 inhibitors on leukemia cells and the underlying mechanisms have not been extensively investigated. In the current study, we analyzed the anti-leukemia effects of C646, a selective and competitive p300 inhibitor, on AML cells. Results showed that C646 inhibited cellular proliferation, reduced colony formation, evoked partial cell cycle arrest in G1 phase, and induced apoptosis in AE-positive AML cell lines and primary blasts isolated from leukemic mice and AML patients. Nevertheless, no significant inhibitory effects were observed in granulocyte colony-stimulating factor-mobilized normal peripheral blood stem cells. Notably, AE-positive AML cells were more sensitive to lower C646 doses than AE-negative ones. And C646-induced growth inhibition on AE-positive AML cells was associated with reduced global histone H3 acetylation and declined c-kit and bcl-2 levels. Therefore, C646 may be a potential candidate for treating AE-positive AML.
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MESH Headings
- Acetylation/drug effects
- Animals
- Apoptosis/drug effects
- Cell Cycle Checkpoints/drug effects
- Cell Line, Tumor
- Cell Proliferation/drug effects
- Core Binding Factor Alpha 2 Subunit/genetics
- Core Binding Factor Alpha 2 Subunit/metabolism
- Enzyme Inhibitors/pharmacology
- Female
- Gene Expression Regulation, Leukemic/drug effects
- Granulocyte Colony-Stimulating Factor/pharmacology
- Hematopoietic Stem Cells/cytology
- Hematopoietic Stem Cells/drug effects
- Hematopoietic Stem Cells/metabolism
- Histones/genetics
- Histones/metabolism
- Humans
- Leukemia, Myeloid, Acute/drug therapy
- Leukemia, Myeloid, Acute/genetics
- Leukemia, Myeloid, Acute/metabolism
- Leukemia, Myeloid, Acute/pathology
- Mice
- Mice, Inbred C57BL
- Oncogene Proteins, Fusion/genetics
- Oncogene Proteins, Fusion/metabolism
- Proto-Oncogene Proteins c-bcl-2/genetics
- Proto-Oncogene Proteins c-bcl-2/metabolism
- Proto-Oncogene Proteins c-kit/genetics
- Proto-Oncogene Proteins c-kit/metabolism
- RUNX1 Translocation Partner 1 Protein
- Signal Transduction/drug effects
- p300-CBP Transcription Factors/antagonists & inhibitors
- p300-CBP Transcription Factors/genetics
- p300-CBP Transcription Factors/metabolism
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Affiliation(s)
- Xiao-ning Gao
- Department of Hematology, Chinese PLA General Hospital, Beijing, China
| | - Ji Lin
- Central Lab, Hainan Branch, Chinese PLA General Hospital, Sanya, China
| | - Qiao-yang Ning
- Department of Hematology, Chinese PLA General Hospital, Beijing, China
| | - Li Gao
- Department of Hematology, Chinese PLA General Hospital, Beijing, China
| | - Yu-shi Yao
- Department of Hematology, Chinese PLA General Hospital, Beijing, China
| | - Ji-hao Zhou
- Department of Hematology, Chinese PLA General Hospital, Beijing, China
| | - Yong-hui Li
- Department of Hematology, Chinese PLA General Hospital, Beijing, China
| | - Li-li Wang
- Department of Hematology, Chinese PLA General Hospital, Beijing, China
| | - Li Yu
- Department of Hematology, Chinese PLA General Hospital, Beijing, China
- * E-mail:
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Dreidax D, Gogolin S, Schroeder C, Muth D, Brueckner LM, Hess EM, Zapatka M, Theißen J, Fischer M, Ehemann V, Schwab M, Savelyeva L, Westermann F. Low p14ARF expression in neuroblastoma cells is associated with repressed histone mark status, and enforced expression induces growth arrest and apoptosis. Hum Mol Genet 2013; 22:1735-45. [PMID: 23343716 DOI: 10.1093/hmg/ddt020] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
The TP53 tumor suppressor pathway is abrogated by TP53 mutations in the majority of human cancers. Increased levels of wild-type TP53 in aggressive neuroblastomas appear paradox but are tolerated by tumor cells due to co-activation of the TP53 ubiquitin ligase, MDM2. The role of the MDM2 antagonist, p14(ARF), in controlling the TP53-MDM2 balance in neuroblastoma is unresolved. In the present study, we show that conditional p14(ARF) expression substantially suppresses viability, clonogenicity and anchorage-independent growth in p14(ARF)-deficient or MYCN-amplified neuroblastoma cell lines. Furthermore, ectopic 14(ARF) expression induced accumulation of cells in the G1 phase and apoptosis, which was paralleled by accumulation of TP53 and its targets. Comparative genomic hybridization analysis of 193 primary neuroblastomas detected one homozygous deletion of CDKN2A (encoding both p14(ARF) and p16(INK4A)) and heterozygous loss of CDKN2A in 22% of tumors. Co-expression analysis of p14(ARF) and its transactivator, E2F1, in a set of 68 primary tumors revealed only a weak correlation, suggesting that further regulatory mechanisms govern p14(ARF) expression in neuroblastomas. Intriguingly, analyses utilizing chromatin immunoprecipitation revealed different histone mark-defined epigenetic activity states of p14(ARF) in neuroblastoma cell lines that correlated with endogenous p14(ARF) expression but not with episomal p14(ARF) promoter reporter activity, indicating that the native chromatin context serves to epigenetically repress p14(ARF) in neuroblastoma cells. Collectively, the data pinpoint p14(ARF) as a critical factor for efficient TP53 response in neuroblastoma cells and assign p14(ARF) as a neuroblastoma suppressor candidate that is impaired by genomic loss and epigenetic repression.
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Affiliation(s)
- Daniel Dreidax
- Division of Tumor Genetics, German Cancer Research Center (DKFZ), Heidelberg, Germany
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