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Pakjoo M, Ahmadi SE, Zahedi M, Jaafari N, Khademi R, Amini A, Safa M. Interplay between proteasome inhibitors and NF-κB pathway in leukemia and lymphoma: a comprehensive review on challenges ahead of proteasome inhibitors. Cell Commun Signal 2024; 22:105. [PMID: 38331801 PMCID: PMC10851565 DOI: 10.1186/s12964-023-01433-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2023] [Accepted: 12/11/2023] [Indexed: 02/10/2024] Open
Abstract
The current scientific literature has extensively explored the potential role of proteasome inhibitors (PIs) in the NF-κB pathway of leukemia and lymphoma. The ubiquitin-proteasome system (UPS) is a critical component in regulating protein degradation in eukaryotic cells. PIs, such as BTZ, are used to target the 26S proteasome in hematologic malignancies, resulting in the prevention of the degradation of tumor suppressor proteins, the activation of intrinsic mitochondrial-dependent cell death, and the inhibition of the NF-κB signaling pathway. NF-κB is a transcription factor that plays a critical role in the regulation of apoptosis, cell proliferation, differentiation, inflammation, angiogenesis, and tumor migration. Despite the successful use of PIs in various hematologic malignancies, there are limitations such as resistant to these inhibitors. Some reports suggest that PIs can induce NF-κB activation, which increases the survival of malignant cells. This article discusses the various aspects of PIs' effects on the NF-κB pathway and their limitations. Video Abstract.
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Affiliation(s)
- Mahdi Pakjoo
- Department of Hematology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
- ATMP department, Breast cancer research center, Motamed cancer institute, ACECR, P.O. BOX:15179/64311, Tehran, Iran
| | - Seyed Esmaeil Ahmadi
- Department of Hematology and Blood Banking, Faculty of Allied Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Mohammad Zahedi
- Department of Medical Biotechnology, School of Allied Medicine, Student Research Committee, Iran University of Medical Sciences, Tehran, Iran
| | - Niloofar Jaafari
- Department of Hematology and Blood Banking, Faculty of Allied Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Reyhane Khademi
- Thalassemia & Hemoglobinopathy Research Center, Health Research Institute, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Ali Amini
- Department of Hematology and Blood Banking, Faculty of Allied Medicine, Iran University of Medical Sciences, Tehran, Iran.
| | - Majid Safa
- Department of Hematology and Blood Banking, Faculty of Allied Medicine, Iran University of Medical Sciences, Tehran, Iran.
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2
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Di Francesco B, Verzella D, Capece D, Vecchiotti D, Di Vito Nolfi M, Flati I, Cornice J, Di Padova M, Angelucci A, Alesse E, Zazzeroni F. NF-κB: A Druggable Target in Acute Myeloid Leukemia. Cancers (Basel) 2022; 14:3557. [PMID: 35884618 PMCID: PMC9319319 DOI: 10.3390/cancers14143557] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 07/18/2022] [Accepted: 07/19/2022] [Indexed: 02/01/2023] Open
Abstract
Acute Myeloid Leukemia (AML) is an aggressive hematological malignancy that relies on highly heterogeneous cytogenetic alterations. Although in the last few years new agents have been developed for AML treatment, the overall survival prospects for AML patients are still gloomy and new therapeutic options are still urgently needed. Constitutive NF-κB activation has been reported in around 40% of AML patients, where it sustains AML cell survival and chemoresistance. Given the central role of NF-κB in AML, targeting the NF-κB pathway represents an attractive strategy to treat AML. This review focuses on current knowledge of NF-κB's roles in AML pathogenesis and summarizes the main therapeutic approaches used to treat NF-κB-driven AML.
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3
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Lower RNA expression of ALDH1A1 distinguishes the favorable risk group in acute myeloid leukemia. Mol Biol Rep 2022; 49:3321-3331. [PMID: 35028852 DOI: 10.1007/s11033-021-07073-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Accepted: 12/08/2021] [Indexed: 02/06/2023]
Abstract
The expression and activity of enzymes that belong to the aldehyde dehydrogenases is a characteristic of both normal and malignant stem cells. ALDH1A1 is an enzyme critical in cancer stem cells. In acute myeloid leukemia (AML), ALDH1A1 protects leukemia-initiating cells from a number of antineoplastic agents, which include inhibitors of protein tyrosine kinases. Furthermore, ALDH1A1 proves vital for the establishment of human AML xenografts in mice. We review here important studies characterizing the role of ALDH1A1 in AML and its potential as a therapeutic target. We also analyze datasets from leading studies, and show that decreased ALDH1A1 RNA expression consistently characterizes the AML patient risk group with a favorable prognosis, while there is a consistent association of high ALDH1A1 RNA expression with high risk and poor overall survival. Our review and analysis reinforces the notion to employ both novel as well as existing inhibitors of the ALDH1A1 protein against AML.
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4
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Fisher DAC, Fowles JS, Zhou A, Oh ST. Inflammatory Pathophysiology as a Contributor to Myeloproliferative Neoplasms. Front Immunol 2021; 12:683401. [PMID: 34140953 PMCID: PMC8204249 DOI: 10.3389/fimmu.2021.683401] [Citation(s) in RCA: 56] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2021] [Accepted: 05/12/2021] [Indexed: 12/12/2022] Open
Abstract
Myeloid neoplasms, including acute myeloid leukemia (AML), myeloproliferative neoplasms (MPNs), and myelodysplastic syndromes (MDS), feature clonal dominance and remodeling of the bone marrow niche in a manner that promotes malignant over non-malignant hematopoiesis. This take-over of hematopoiesis by the malignant clone is hypothesized to include hyperactivation of inflammatory signaling and overproduction of inflammatory cytokines. In the Ph-negative MPNs, inflammatory cytokines are considered to be responsible for a highly deleterious pathophysiologic process: the phenotypic transformation of polycythemia vera (PV) or essential thrombocythemia (ET) to secondary myelofibrosis (MF), and the equivalent emergence of primary myelofibrosis (PMF). Bone marrow fibrosis itself is thought to be mediated heavily by the cytokine TGF-β, and possibly other cytokines produced as a result of hyperactivated JAK2 kinase in the malignant clone. MF also features extramedullary hematopoiesis and progression to bone marrow failure, both of which may be mediated in part by responses to cytokines. In MF, elevated levels of individual cytokines in plasma are adverse prognostic indicators: elevated IL-8/CXCL8, in particular, predicts risk of transformation of MF to secondary AML (sAML). Tumor necrosis factor (TNF, also known as TNFα), may underlie malignant clonal dominance, based on results from mouse models. Human PV and ET, as well as MF, harbor overproduction of multiple cytokines, above what is observed in normal aging, which can lead to cellular signaling abnormalities separate from those directly mediated by hyperactivated JAK2 or MPL kinases. Evidence that NFκB pathway signaling is frequently hyperactivated in a pan-hematopoietic pattern in MPNs, including in cells outside the malignant clone, emphasizes that MPNs are pan-hematopoietic diseases, which remodel the bone marrow milieu to favor persistence of the malignancy. Clinical evidence that JAK2 inhibition by ruxolitinib in MF neither reliably reduces malignant clonal burden nor eliminates cytokine elevations, suggests targeting cytokine mediated signaling as a therapeutic strategy, which is being pursued in new clinical trials. Greater knowledge of inflammatory pathophysiology in MPNs can therefore contribute to the development of more effective therapy.
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Affiliation(s)
- Daniel Arthur Corpuz Fisher
- Divisions of Hematology & Oncology, School of Medicine, Washington University in St. Louis, Saint Louis, MO, United States
| | - Jared Scott Fowles
- Divisions of Hematology & Oncology, School of Medicine, Washington University in St. Louis, Saint Louis, MO, United States
| | - Amy Zhou
- Divisions of Hematology & Oncology, School of Medicine, Washington University in St. Louis, Saint Louis, MO, United States
| | - Stephen Tracy Oh
- Divisions of Hematology & Oncology, School of Medicine, Washington University in St. Louis, Saint Louis, MO, United States
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5
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Khan I, Eklund EE, Gartel AL. Therapeutic Vulnerabilities of Transcription Factors in AML. Mol Cancer Ther 2020; 20:229-237. [PMID: 33158995 DOI: 10.1158/1535-7163.mct-20-0115] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Revised: 08/13/2020] [Accepted: 10/19/2020] [Indexed: 11/16/2022]
Abstract
Acute myeloid leukemia (AML) is characterized by impaired myeloid lineage differentiation, uncontrolled proliferation, and inhibition of proapoptotic pathways. In spite of a relatively homogeneous clinical disease presentation, risk of long-term survival in AML varies from 20% to 80% depending on molecular disease characteristics. In recognition of the molecular heterogeneity of AML, the European Leukemia Net (ELN) and WHO classification systems now incorporate cytogenetics and increasing numbers of gene mutations into AML prognostication. Several of the genomic AML subsets are characterized by unique transcription factor alterations that are highlighted in this review. There are many mechanisms of transcriptional deregulation in leukemia. We broadly classify transcription factors based on mechanisms of transcriptional deregulation including direct involvement of transcription factors in recurrent translocations, loss-of-function mutations, and intracellular relocalization. Transcription factors, due to their pleiotropic effects, have been attractive but elusive targets. Indirect targeting approaches include inhibition of upstream kinases such as TAK1 for suppression of NFκB signaling and downstream effectors such as FGF signaling in HOXA-upregulated leukemia. Other strategies include targeting scaffolding proteins like BrD4 in the case of MYC or coactivators such as menin to suppress HOX expression; disrupting critical protein interactions in the case of β-catenin:TCF/LEF, and preventing transcription factor binding to DNA as in the case of PU.1 or FOXM1. We comprehensively describe the mechanism of deregulation of transcription factors in genomic subsets of AML, consequent pathway addictions, and potential therapeutic strategies.
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Affiliation(s)
- Irum Khan
- Department of Medicine, University of Illinois, Chicago, Illinois
| | - Elizabeth E Eklund
- Feinberg School of Medicine and Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago, Illinois.,Jesse Brown VA Medical Center, Chicago, Illinois
| | - Andrei L Gartel
- Department of Medicine, University of Illinois, Chicago, Illinois.
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6
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Fisher DAC, Miner CA, Engle EK, Hu H, Collins TB, Zhou A, Allen MJ, Malkova ON, Oh ST. Cytokine production in myelofibrosis exhibits differential responsiveness to JAK-STAT, MAP kinase, and NFκB signaling. Leukemia 2019; 33:1978-1995. [PMID: 30718771 PMCID: PMC6813809 DOI: 10.1038/s41375-019-0379-y] [Citation(s) in RCA: 93] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 12/13/2018] [Accepted: 12/19/2018] [Indexed: 12/31/2022]
Abstract
The distinct clinical features of myelofibrosis (MF) have been attributed in part to dysregulated inflammatory cytokine production. Circulating cytokine levels are elevated in MF patients; a subset of which have been shown to be poor prognostic indicators. In this study, cytokine overproduction was examined in MF patient plasma and in MF blood cells ex vivo using mass cytometry. Plasma cytokines measured following treatment with ruxolitinib remained markedly abnormal, indicating that aberrant cytokine production persists despite therapeutic JAK2 inhibition. In MF patient samples, 14/15 cytokines measured by mass cytometry were found to be constitutively overproduced, with the principal cellular source for most cytokines being monocytes, implicating a non-cell-autonomous role for monocyte-derived cytokines impacting disease-propagating stem/progenitor cells in MF. The majority of cytokines elevated in MF exhibited ex vivo hypersensitivity to thrombopoietin (TPO), toll-like receptor (TLR) ligands, and/or tumor necrosis factor (TNF). A subset of this group (including TNF, IL-6, IL-8, IL-10) was minimally sensitive to ruxolitinib. All TPO/TLR/TNF-sensitive cytokines, however, were sensitive to pharmacologic inhibition of NFκB and/or MAP kinase signaling. These results indicate that NFκB and MAP kinase signaling maintain cytokine overproduction in MF, and that inhibition of these pathways may provide optimal control of inflammatory pathophysiology in MF.
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Affiliation(s)
- Daniel A C Fisher
- Division of Hematology, Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA
| | - Cathrine A Miner
- Immunomonitoring Laboratory, Center for Human Immunology and Immunotherapy Programs, Washington University School of Medicine, St. Louis, MO, USA
| | - Elizabeth K Engle
- Division of Hematology, Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA
| | - Hengrui Hu
- Division of Hematology, Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA
- Program in Biostatistics, Washington University School of Medicine, St. Louis, MO, USA
| | - Taylor B Collins
- Division of Hematology, Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA
| | - Amy Zhou
- Division of Hematology, Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA
| | - Maggie J Allen
- Division of Hematology, Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA
| | - Olga N Malkova
- Immunomonitoring Laboratory, Center for Human Immunology and Immunotherapy Programs, Washington University School of Medicine, St. Louis, MO, USA
| | - Stephen T Oh
- Division of Hematology, Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA.
- Immunomonitoring Laboratory, Center for Human Immunology and Immunotherapy Programs, Washington University School of Medicine, St. Louis, MO, USA.
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7
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Hillert LK, Bettermann‐Bethge K, Nimmagadda SC, Fischer T, Naumann M, Lavrik IN. Targeting RIPK1 in AML cells carrying FLT3‐ITD. Int J Cancer 2019; 145:1558-1569. [DOI: 10.1002/ijc.32246] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Revised: 12/11/2018] [Accepted: 01/22/2019] [Indexed: 11/11/2022]
Affiliation(s)
- Laura K. Hillert
- Translational Inflammation Research, Health Campus Immunology, Infectiology and Inflammation, Center of Dynamic Systems, Medical FacultyOtto von Guericke University Magdeburg Germany
| | - Kira Bettermann‐Bethge
- Translational Inflammation Research, Health Campus Immunology, Infectiology and Inflammation, Center of Dynamic Systems, Medical FacultyOtto von Guericke University Magdeburg Germany
| | - Subbaiah Chary Nimmagadda
- Department of Hematology and Oncology, Health Campus Immunology, Infectiology and InflammationOtto von Guericke University, Medical Faculty Magdeburg Germany
| | - Thomas Fischer
- Department of Hematology and Oncology, Health Campus Immunology, Infectiology and InflammationOtto von Guericke University, Medical Faculty Magdeburg Germany
| | - Michael Naumann
- Institute of Experimental Internal Medicine, Health Campus Immunology, Infectiology and InflammationOtto von Guericke University, Medical Faculty Magdeburg Germany
| | - Inna N. Lavrik
- Translational Inflammation Research, Health Campus Immunology, Infectiology and Inflammation, Center of Dynamic Systems, Medical FacultyOtto von Guericke University Magdeburg Germany
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8
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Ignatz-Hoover JJ, Wang V, Mackowski NM, Roe AJ, Ghansah IK, Ueda M, Lazarus HM, de Lima M, Paietta E, Fernandez H, Cripe L, Tallman M, Wald DN. Aberrant GSK3β nuclear localization promotes AML growth and drug resistance. Blood Adv 2018; 2:2890-2903. [PMID: 30385433 PMCID: PMC6234355 DOI: 10.1182/bloodadvances.2018016006] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Accepted: 08/23/2018] [Indexed: 12/12/2022] Open
Abstract
Acute myeloid leukemia (AML) is a devastating disease with poor patient survival. As targetable mutations in AML are rare, novel oncogenic mechanisms are needed to define new therapeutic targets. We identified AML cells that exhibit an aberrant pool of nuclear glycogen synthase kinase 3β (GSK3β). This nuclear fraction drives AML growth and drug resistance. Nuclear, but not cytoplasmic, GSK3β enhances AML colony formation and AML growth in mouse models. Nuclear GSK3β drives AML partially by promoting nuclear localization of the NF-κB subunit, p65. Finally, nuclear GSK3β localization has clinical significance as it strongly correlates to worse patient survival (n = 86; hazard ratio = 2.2; P < .01) and mediates drug resistance in cell and animal models. Nuclear localization of GSK3β may define a novel oncogenic mechanism in AML and represent a new therapeutic target.
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MESH Headings
- Animals
- Antineoplastic Agents/pharmacology
- Antineoplastic Agents/therapeutic use
- Cell Line, Tumor
- Cell Nucleus/metabolism
- Cell Proliferation/drug effects
- Cell Survival/drug effects
- Drug Resistance, Neoplasm
- Female
- Glycogen Synthase Kinase 3 beta/metabolism
- Humans
- Leukemia, Myeloid, Acute/drug therapy
- Leukemia, Myeloid, Acute/mortality
- Leukemia, Myeloid, Acute/pathology
- Mice
- Mice, Inbred NOD
- Mice, SCID
- Myeloid-Lymphoid Leukemia Protein/metabolism
- NF-kappa B/metabolism
- Oncogene Proteins, Fusion/metabolism
- Proportional Hazards Models
- Survival Rate
- Transplantation, Heterologous
- Up-Regulation
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Affiliation(s)
| | - Victoria Wang
- Eastern Cooperative Oncology Group-American College of Radiology Imaging Network (ECOG-ACRIN) Biostatistics Center, Dana-Farber Cancer Institute, Boston, MA
| | | | - Anne J Roe
- Department of Pathology, Case Western Reserve University, Cleveland, OH
| | - Isaac K Ghansah
- Department of Pathology, Case Western Reserve University, Cleveland, OH
| | - Masumi Ueda
- Department of Pathology, Case Western Reserve University, Cleveland, OH
| | - Hillard M Lazarus
- Department of Hematology and Oncology, University Hospitals Case Medical Center and Case Western Reserve University, Cleveland, OH
| | - Marcos de Lima
- Department of Hematology and Oncology, University Hospitals Case Medical Center and Case Western Reserve University, Cleveland, OH
| | | | - Hugo Fernandez
- Department of Blood and Marrow Transplant, Moffitt Cancer Center, Tampa, FL
| | - Larry Cripe
- Department of Medicine, Indiana University, Indianapolis, IN
| | - Martin Tallman
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY; and
| | - David N Wald
- Department of Pathology, Case Western Reserve University, Cleveland, OH
- Department of Pathology, University Hospitals Case Medical Center, Cleveland, OH
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9
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Carretta M, Brouwers-Vos AZ, Bosman M, Horton SJ, Martens JHA, Vellenga E, Schuringa JJ. BRD3/4 inhibition and FLT3-ligand deprivation target pathways that are essential for the survival of human MLL-AF9+ leukemic cells. PLoS One 2017; 12:e0189102. [PMID: 29240787 PMCID: PMC5730124 DOI: 10.1371/journal.pone.0189102] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Accepted: 11/13/2017] [Indexed: 01/15/2023] Open
Abstract
In the present work we aimed to identify targetable signaling networks in human MLL-AF9 leukemias. We show that MLL-AF9 cells critically depend on FLT3-ligand induced pathways as well as on BRD3/4 for their survival. We evaluated the in vitro and in vivo efficacy of the BRD3/4 inhibitor I-BET151 in various human MLL-AF9 (primary) models and patient samples and analyzed the transcriptome changes following treatment. To further understand the mode of action of BRD3/4 inhibition, we performed ChIP-seq experiments on the MLL-AF9 complex in THP1 cells and compared it to RNA-seq data of I-BET151 treated cells. While we could confirm a consistent and specific downregulation of key-oncogenic drivers such as MYC and BCL2, we found that the majority of I-BET151-responsive genes were not direct MLL-AF9 targets. In fact, MLL-AF9 specific targets such as the HOXA cluster, MEIS1 and other cell cycle regulators such as CDK6 were not affected by I-BET151 treatment. Furthermore, we also highlight how MLL-AF9 transformed cells are dependent on the function of non-mutated hematopoietic transcription factors and tyrosine kinases such as the FLT3-TAK1/NF-kB pathway, again impacting on BCL2 but not on the HOXA cluster. We conclude that BRD3/4 and the FLT3-TAK1/NF-kB pathways collectively control a set of targets that are critically important for the survival of human MLL-AF9 cells.
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Affiliation(s)
- Marco Carretta
- Department of Experimental Hematology, Cancer Research Center Groningen (CRCG), University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Annet Z. Brouwers-Vos
- Department of Experimental Hematology, Cancer Research Center Groningen (CRCG), University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Matthieu Bosman
- Department of Experimental Hematology, Cancer Research Center Groningen (CRCG), University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Sarah J. Horton
- Department of Experimental Hematology, Cancer Research Center Groningen (CRCG), University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Joost H. A. Martens
- Department of Molecular Biology, Faculty of Science and Medicine, Radboud Institute for Molecular Life Sciences, Radboud University Nijmegen, Nijmegen, The Netherlands
| | - Edo Vellenga
- Department of Experimental Hematology, Cancer Research Center Groningen (CRCG), University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Jan Jacob Schuringa
- Department of Experimental Hematology, Cancer Research Center Groningen (CRCG), University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
- * E-mail:
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10
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NF-κB in Hematological Malignancies. Biomedicines 2017; 5:biomedicines5020027. [PMID: 28561798 PMCID: PMC5489813 DOI: 10.3390/biomedicines5020027] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Revised: 05/24/2017] [Accepted: 05/26/2017] [Indexed: 12/30/2022] Open
Abstract
NF-κB (Nuclear Factor Κ-light-chain-enhancer of activated B cells) transcription factors are critical regulators of immunity, stress response, apoptosis, and differentiation. Molecular defects promoting the constitutive activation of canonical and non-canonical NF-κB signaling pathways contribute to many diseases, including cancer, diabetes, chronic inflammation, and autoimmunity. In the present review, we focus our attention on the mechanisms of NF-κB deregulation in hematological malignancies. Key positive regulators of NF-κB signaling can act as oncogenes that are often prone to chromosomal translocation, amplifications, or activating mutations. Negative regulators of NF-κB have tumor suppressor functions, and are frequently inactivated either by genomic deletions or point mutations. NF-κB activation in tumoral cells is also driven by the microenvironment or chronic signaling that does not rely on genetic alterations.
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11
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Fallahi S, Mohammadi SM, Tayefi Nasrabadi H, Alihemmati A, Samadi N, Gholami S, Shanehbandi D, Nozad Charoudeh H. Impact of C-rel inhibition of cord blood-derived B-, T-, and NK cells. J Immunotoxicol 2017; 14:15-22. [DOI: 10.1080/1547691x.2016.1250849] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Affiliation(s)
- Shirin Fallahi
- Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
- Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Seyede Momeneh Mohammadi
- Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
- Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hamid Tayefi Nasrabadi
- Tissue Engineering Research Group, Advanced Research School, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Alireza Alihemmati
- Tissue Engineering Research Group, Advanced Research School, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Naser Samadi
- Department of Clinical Biochemistry and Laboratory Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Sanaz Gholami
- Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
- Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Dariush Shanehbandi
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
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12
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Lin XC, Liu XG, Zhang YM, Li N, Yang ZG, Fu WY, Lan LB, Zhang HT, Dai Y. Integrated analysis of microRNA and transcription factor reveals important regulators and regulatory motifs in adult B-cell acute lymphoblastic leukemia. Int J Oncol 2016; 50:671-683. [PMID: 28101583 DOI: 10.3892/ijo.2016.3832] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Accepted: 12/16/2016] [Indexed: 11/06/2022] Open
Abstract
B-cell acute lymphoblastic leukemia (B‑ALL) is an aggressive hematological malignancy and a leading cause of cancer-related mortality in children and young adults. The molecular mechanisms involved in the regulation of its gene expression has yet to be fully elucidated. In the present study, we performed large scale expression profiling of microRNA (miRNA) and transcription factor (TF) by Illumina deep‑sequencing and TF array technology, respectively, and identified 291 differentially expressed miRNAs and 201 differentially expressed TFs in adult B‑ALL samples relative to their controls. After integrating expression profile data with computational prediction of miRNA and TF targets from different databases, we construct a comprehensive miRNA‑TF regulatory network specifically for adult B‑ALL. Network function analysis revealed 25 significantly enriched pathways, four pathways are well‑known to be involved in B‑ALL, such as PI3K‑Akt signaling pathway, Jak‑STAT signaling pathway, Ras signaling pathway and cell cycle pathway. By analyzing the network topology, we identified 28 hub miRNAs and 19 hub TFs in the network, and found nine potential B‑ALL regulators among these hub nodes. We also constructed a Jak‑STAT signaling sub‑network for B‑ALL. Based on the sub‑network analysis and literature survey, we proposed a cellular model to discuss MYC/miR‑15a‑5p/FLT3 feed-forward loop (FFL) with Jak‑STAT signaling pathway in B‑ALL. These findings enhance our understanding of this disease at the molecular level, as well as provide putative therapeutic targets for B-ALL.
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Affiliation(s)
- Xiao-Cong Lin
- Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics, Guangdong Medical University, Dongguan, Guangdong 523808, P.R. China
| | - Xin-Guang Liu
- Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics, Guangdong Medical University, Dongguan, Guangdong 523808, P.R. China
| | - Yu-Ming Zhang
- Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics, Guangdong Medical University, Dongguan, Guangdong 523808, P.R. China
| | - Ning Li
- Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics, Guangdong Medical University, Dongguan, Guangdong 523808, P.R. China
| | - Zhi-Gang Yang
- Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics, Guangdong Medical University, Dongguan, Guangdong 523808, P.R. China
| | - Wei-Yu Fu
- Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics, Guangdong Medical University, Dongguan, Guangdong 523808, P.R. China
| | - Liu-Bo Lan
- Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics, Guangdong Medical University, Dongguan, Guangdong 523808, P.R. China
| | - Hai-Tao Zhang
- Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics, Guangdong Medical University, Dongguan, Guangdong 523808, P.R. China
| | - Yong Dai
- Clinical Medical Research Center, Shenzhen People's Hospital, Shenzhen, Guangdong 518020, P.R. China
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13
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Mass cytometry analysis reveals hyperactive NF Kappa B signaling in myelofibrosis and secondary acute myeloid leukemia. Leukemia 2016; 31:1962-1974. [PMID: 28008177 PMCID: PMC5540814 DOI: 10.1038/leu.2016.377] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 10/14/2016] [Accepted: 11/28/2016] [Indexed: 12/26/2022]
Abstract
Myeloproliferative neoplasms (MPNs) feature a malignant clone containing the JAK2 V617F mutation, or another mutation causing dysregulated JAK2 kinase activity. The multiple disease phenotypes of MPNs, and their tendency to transform phenotypically, suggest pathophysiologic heterogeneities beyond a common phenomenon of JAK2 hyperactivation. JAK2 has the potential to activate multiple other signaling molecules, either directly through downstream effectors, or indirectly through induction of target gene expression. We have interrogated myeloproliferative signaling in myelofibrosis (MF) and secondary acute myeloid leukemia (sAML) patient samples using mass cytometry, which allows the quantitative measurement of multiple signaling molecules simultaneously at the single cell level, in cell populations representing a nearly complete spectrum of hematopoiesis. MF and sAML malignant cells demonstrated a high prevalence of hyperactivation of the JAK-STAT, MAP kinase, PI3 kinase, and NFκB signaling pathways. Constitutive NFκB signaling was evident across MF and sAML patients. A supporting GSEA analysis of MF showed many NFκB target genes to be expressed above normal levels in MF patient CD34+ cells. NFκB inhibition suppressed colony formation from MF CD34+ cells. This study indicates that NFκB signaling contributes to human myeloproliferative disease and is abnormally activated in MF and sAML.
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LIN XIAOCONG, XU YONG, SUN GUOPING, WEN JINLI, LI NING, ZHANG YUMING, YANG ZHIGANG, ZHANG HAITAO, DAI YONG. Molecular dysfunctions in acute myeloid leukemia revealed by integrated analysis of microRNA and transcription factor. Int J Oncol 2016; 48:2367-80. [DOI: 10.3892/ijo.2016.3489] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2015] [Accepted: 01/19/2016] [Indexed: 11/05/2022] Open
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Constitutive NF-κB activation in AML: Causes and treatment strategies. Crit Rev Oncol Hematol 2016; 98:35-44. [DOI: 10.1016/j.critrevonc.2015.10.001] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2015] [Revised: 08/12/2015] [Accepted: 10/01/2015] [Indexed: 01/01/2023] Open
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Zhou J, Ching YQ, Chng WJ. Aberrant nuclear factor-kappa B activity in acute myeloid leukemia: from molecular pathogenesis to therapeutic target. Oncotarget 2015; 6:5490-500. [PMID: 25823927 PMCID: PMC4467382 DOI: 10.18632/oncotarget.3545] [Citation(s) in RCA: 83] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2015] [Accepted: 02/15/2015] [Indexed: 02/07/2023] Open
Abstract
The overall survival of patients with acute myeloid leukemia (AML) has not been improved significantly over the last decade. Molecularly targeted agents hold promise to change the therapeutic landscape in AML. The nuclear factor kappa B (NF-κB) controls a plethora of biological process through switching on and off its long list of target genes. In AML, constitutive NF-κB has been detected in 40% of cases and its aberrant activity enable leukemia cells to evade apoptosis and stimulate proliferation. These facts suggest that NF-κB signaling pathway plays a fundamental role in the development of AML and it represents an attractive target for the intervention of AML. This review summarizes our current knowledge of NF-κB signaling transduction including canonical and non-canonical NF-κB pathways. Then we specifically highlight what factors contribute to the aberrant activation of NF-κB activity in AML, followed by an overview of 8 important clinical trials of the first FDA approved proteasome inhibitor, Bortezomib (Velcade), which is a NF-κB inhibitor too, in combination with other therapeutic agents in patients with AML. Finally, this review discusses the future directions of NF-κB inhibitor in treatment of AML, especially in targeting leukemia stem cells (LSCs).
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Affiliation(s)
- Jianbiao Zhou
- Cancer Science Institute of Singapore, National University of Singapore, 14 Medical Drive, Centre for Translational Medicine, Singapore, Republic of Singapore
| | - Ying Qing Ching
- Cancer Science Institute of Singapore, National University of Singapore, 14 Medical Drive, Centre for Translational Medicine, Singapore, Republic of Singapore
| | - Wee-Joo Chng
- Cancer Science Institute of Singapore, National University of Singapore, 14 Medical Drive, Centre for Translational Medicine, Singapore, Republic of Singapore
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Republic of Singapore
- Department of Hematology-Oncology, National University Cancer Institute of Singapore (NCIS), The National University Health System (NUHS), Singapore, Republic of Singapore
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Gerloff D, Grundler R, Wurm AA, Bräuer-Hartmann D, Katzerke C, Hartmann JU, Madan V, Müller-Tidow C, Duyster J, Tenen DG, Niederwieser D, Behre G. NF-κB/STAT5/miR-155 network targets PU.1 in FLT3-ITD-driven acute myeloid leukemia. Leukemia 2014; 29:535-47. [PMID: 25092144 DOI: 10.1038/leu.2014.231] [Citation(s) in RCA: 104] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2014] [Revised: 06/11/2014] [Accepted: 07/21/2014] [Indexed: 01/07/2023]
Abstract
Almost 30% of all acute myeloid leukemias (AML) are associated with an internal tandem duplication (ITD) in the juxtamembrane domain of FMS-like tyrosine kinase 3 receptor (FLT3). Patients with FLT3-ITD mutations tend to have a poor prognosis. MicroRNAs (miRNAs) have a pivotal role in myeloid differentiation and leukemia. MiRNA-155 (MiR-155) was found to be upregulated in FLT3-ITD-associated AMLs. In this study, we discovered that FLT3-ITD signaling induces the oncogenic miR-155. We show in vitro and in vivo that miR-155 expression is regulated by FLT3-ITD downstream targets nuclear factor-κB (p65) and signal transducer and activator of transcription 5 (STAT5). Further, we demonstrate that miR-155 targets the myeloid transcription factor PU.1. Knockdown of miR-155 or overexpression of PU.1 blocks proliferation and induces apoptosis of FLT3-ITD-associated leukemic cells. Our data demonstrate a novel network in which FLT3-ITD signaling induces oncogenic miR-155 by p65 and STAT5 in AML, thereby targeting transcription factor PU.1.
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Affiliation(s)
- D Gerloff
- Division of Hematology and Oncology, Leipzig University Hospital, Leipzig, Germany
| | - R Grundler
- Department of Internal Medicine III, Technical University Munich, Munich, Germany
| | - A A Wurm
- Division of Hematology and Oncology, Leipzig University Hospital, Leipzig, Germany
| | - D Bräuer-Hartmann
- Division of Hematology and Oncology, Leipzig University Hospital, Leipzig, Germany
| | - C Katzerke
- Division of Hematology and Oncology, Leipzig University Hospital, Leipzig, Germany
| | - J-U Hartmann
- Division of Hematology and Oncology, Leipzig University Hospital, Leipzig, Germany
| | - V Madan
- Cancer Science Institute, National University of Singapore, Singapore
| | - C Müller-Tidow
- Department of Medicine IV, Hematology and Oncology, University of Halle, Halle, Germany
| | - J Duyster
- Department of Hematology/Oncology 1, University Medical Center Freiburg, Freiburg, Germany
| | - D G Tenen
- 1] Cancer Science Institute, National University of Singapore, Singapore [2] Harvard Stem Cell Institute, Harvard Medical School, Boston, MA, USA
| | - D Niederwieser
- Division of Hematology and Oncology, Leipzig University Hospital, Leipzig, Germany
| | - G Behre
- Division of Hematology and Oncology, Leipzig University Hospital, Leipzig, Germany
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Karlic H, Herrmann H, Varga F, Thaler R, Reitermaier R, Spitzer S, Ghanim V, Blatt K, Sperr WR, Valent P, Pfeilstöcker M. The role of epigenetics in the regulation of apoptosis in myelodysplastic syndromes and acute myeloid leukemia. Crit Rev Oncol Hematol 2014; 90:1-16. [DOI: 10.1016/j.critrevonc.2013.10.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2013] [Revised: 09/03/2013] [Accepted: 10/02/2013] [Indexed: 01/17/2023] Open
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A phase II study of the EGFR inhibitor gefitinib in patients with acute myeloid leukemia. Leuk Res 2013; 38:430-4. [PMID: 24522247 DOI: 10.1016/j.leukres.2013.10.026] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2013] [Revised: 10/22/2013] [Accepted: 10/28/2013] [Indexed: 12/31/2022]
Abstract
Novel therapies for the treatment of acute myeloid leukemia are required to overcome disease resistance and to provide potentially less toxic therapies for older adults. Prior clinical trials involving patients with non-small cell lung cancer have demonstrated the safety and biologic activity of the administration of EGFR inhibitors in carefully selected patients. The potential efficacy of this approach in patients with acute myeloid leukemia is unknown. The effects of gefitinib on differentiation induction and cell viability in AML cell lines and primary patient AML cells were previously reported and cell viability was inhibited in a clinically achievable range. To determine if EGFR inhibitors would be therapeutically efficacious in advanced AML, we performed a phase II trial in which 18 patients with a median age of 72 (range, 57-84 years) were treated with gefitinib (750mg orally daily). While there were no unexpected toxicities, no patients experienced an objective response, though one had stable disease lasting 16 months. We conclude that in spite of pre-clinical activity and anecdotal cases of response to EGFR inhibitors, routine use of the EGFR inhibitor gefitinib as a single agent for advanced AML is not appropriate.
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Schnetzke U, Fischer M, Spies-Weisshart B, Zirm E, Hochhaus A, Müller JP, Scholl S. The E3 ubiquitin ligase TRAF2 can contribute to TNF-α resistance in FLT3-ITD-positive AML cells. Leuk Res 2013; 37:1557-64. [DOI: 10.1016/j.leukres.2013.08.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2013] [Accepted: 08/05/2013] [Indexed: 01/21/2023]
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Alachkar H, Santhanam R, Harb JG, Lucas DM, Oaks JJ, Hickey CJ, Pan L, Kinghorn AD, Caligiuri MA, Perrotti D, Byrd JC, Garzon R, Grever MR, Marcucci G. Silvestrol exhibits significant in vivo and in vitro antileukemic activities and inhibits FLT3 and miR-155 expressions in acute myeloid leukemia. J Hematol Oncol 2013; 6:21. [PMID: 23497456 PMCID: PMC3623627 DOI: 10.1186/1756-8722-6-21] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2013] [Accepted: 02/14/2013] [Indexed: 01/02/2023] Open
Abstract
Background Activating mutations [internal tandem duplication (ITD)] or overexpression of the FMS-like tyrosine kinase receptor-3 (FLT3) gene are associated with poor outcome in acute myeloid leukemia (AML) patients, underscoring the need for novel therapeutic approaches. The natural product silvestrol has potent antitumor activity in several malignancies, but its therapeutic impact on distinct molecular high-risk AML subsets remains to be fully investigated. We examined here the preclinical activity of silvestrol in FLT3-ITD and FLT3 wild-type (wt) AML. Methods Silvestrol in vitro anti-leukemic activity was examined by colorimetric cell viability assay, colony-forming and flow cytometry assays assessing growth inhibition and apoptosis, respectively. Pharmacological activity of silvestrol on FLT3 mRNA translation, mRNA and protein expression was determined by RNA-immunoprecipitation, qRT-PCR and immunoblot analyses, respectively. Silvestrol in vivo efficacy was investigated using MV4-11 leukemia-engrafted mice. Results Silvestrol shows antileukemia activity at nanomolar concentrations both in FLT3-wt overexpressing (THP-1) and FLT3-ITD (MV4-11) expressing AML cell lines (IC50 = 3.8 and 2.7 nM, respectively) and patients’ primary blasts [IC50 = ~12 nM (FLT3-wt) and ~5 nM (FLT3-ITD)]. Silvestrol increased apoptosis (~4fold, P = 0.0001), and inhibited colony-formation (100%, P < 0.0001) in primary blasts. Silvestrol efficiently inhibited FLT3 translation reducing FLT3 protein expression by 80–90% and decreased miR-155 levels (~60%), a frequently co-regulated onco-miR in FLT3-ITD-positive AML. The median survival of silvestrol-treated vs vehicle-treated mice was 63 vs 29 days post-engraftment, respectively (P < 0.0001). Conclusions Silvestrol exhibits significant in vivo and in vitro antileukemic activities in AML through a novel mechanism resulting in inhibition of FLT3 and miR-155 expression. These encouraging results warrant a rapid translation of silvestrol for clinical testing in AML.
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Affiliation(s)
- Houda Alachkar
- Division of Hematology, Department of Medicine, The Ohio State University, Columbus, OH, USA.
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Belickova M, Merkerova MD, Stara E, Vesela J, Sponerova D, Mikulenkova D, Brdicka R, Neuwirtova R, Jonasova A, Cermak J. DNA repair gene variants are associated with an increased risk of myelodysplastic syndromes in a Czech population. J Hematol Oncol 2013; 6:9. [PMID: 23339595 PMCID: PMC3556100 DOI: 10.1186/1756-8722-6-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2012] [Accepted: 01/17/2013] [Indexed: 01/18/2023] Open
Abstract
Background Interactions between genetic variants and risk factors in myelodysplastic syndromes are poorly understood. In this case–control study, we analyzed 1 421 single nucleotide polymorphisms in 408 genes involved in cancer-related pathways in 198 patients and 292 controls. Methods The Illumina SNP Cancer Panel was used for genotyping of samples. The chi-squared, p-values, odds ratios and upper and lower limits of the 95% confidence interval were calculated for all the SNPs that passed the quality control filtering. Results Gene-based analysis showed nine candidate single nucleotide polymorphisms significantly associated with the disease susceptibility (q-value < 0.05). Four of these polymorphisms were located in oxidative damage/DNA repair genes (LIG1, RAD52, MSH3 and GPX3), which may play important roles in the pathobiology of myelodysplastic syndromes. Two of nine candidate polymorphisms were located in transmembrane transporters (ABCB1 and SLC4A2), contributing to individual variability in drug responses and patient prognoses. Moreover, the variations in the ROS1 and STK6 genes were associated with the overall survival of patients. Conclusions Our association study identified genetic variants in Czech population that may serve as potential markers for myelodysplastic syndromes.
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Affiliation(s)
- Monika Belickova
- Institute of Hematology and Blood Transfusion, U Nemocnice 1, Prague, Czech Republic.
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Schnetzke U, Fischer M, Kuhn AK, Spies-Weisshart B, Zirm E, Hochhaus A, Müller JP, Scholl S. The E3 ubiquitin ligase TRAF6 inhibits LPS-induced AKT activation in FLT3-ITD-positive MV4-11 AML cells. J Cancer Res Clin Oncol 2012; 139:605-15. [DOI: 10.1007/s00432-012-1362-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2012] [Accepted: 12/05/2012] [Indexed: 01/11/2023]
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Naik US, Gangadharan C, Abbagani K, Nagalla B, Dasari N, Manna SK. A study of nuclear transcription factor-kappa B in childhood autism. PLoS One 2011; 6:e19488. [PMID: 21573053 PMCID: PMC3090385 DOI: 10.1371/journal.pone.0019488] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2010] [Accepted: 04/08/2011] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND Several children with autism show regression in language and social development while maintaining normal motor milestones. A clear period of normal development followed by regression and subsequent improvement with treatment, suggests a multifactorial etiology. The role of inflammation in autism is now a major area of study. Viral and bacterial infections, hypoxia, or medication could affect both foetus and infant. These stressors could upregulate transcription factors like nuclear factor kappa B (NF-κB), a master switch for many genes including some implicated in autism like tumor necrosis factor (TNF). On this hypothesis, it was proposed to determine NF-κB in children with autism. METHODS Peripheral blood samples of 67 children with autism and 29 control children were evaluated for NF-κB using electrophoretic mobility shift assay (EMSA). A phosphor imaging technique was used to quantify values. The fold increase over the control sample was calculated and statistical analysis was carried out using SPSS 15. RESULTS We have noted significant increase in NF-κB DNA binding activity in peripheral blood samples of children with autism. When the fold increase of NF-κB in cases (n = 67) was compared with that of controls (n = 29), there was a significant difference (3.14 vs. 1.40, respectively; p<0.02). CONCLUSION This finding has immense value in understanding many of the known biochemical changes reported in autism. As NF-κB is a response to stressors of several kinds and a master switch for many genes, autism may then arise at least in part from an NF-κB pathway gone awry.
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Affiliation(s)
- Usha S. Naik
- Department of Psychiatry, Osmania Medical College, Hyderabad,
India
| | - Charitha Gangadharan
- Laboratory of Immunology, Centre for DNA Fingerprinting and Diagnostics,
Nampally, Hyderabad, India
| | | | | | - Niranjan Dasari
- Department of Psychiatry, Osmania Medical College, Hyderabad,
India
| | - Sunil K. Manna
- Laboratory of Immunology, Centre for DNA Fingerprinting and Diagnostics,
Nampally, Hyderabad, India
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Breccia M, Alimena G. NF-κB as a potential therapeutic target in myelodysplastic syndromes and acute myeloid leukemia. Expert Opin Ther Targets 2011; 14:1157-76. [PMID: 20858024 DOI: 10.1517/14728222.2010.522570] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
IMPORTANCE OF THE FIELD The inactive NF-κB-inhibitor of NF-κB (IκB) complex is activated by stimuli including pro-inflammatory cytokines, mitogens, growth factors and stress-inducing agents. The release of NF-κB facilitates its translocation to the nucleus, where it promotes cell survival by initiating transcription of genes encoding stress-response enzymes, cell-adhesion molecules, pro-inflammatory cytokines and anti-apoptotic proteins. NF-κB and associated regulatory factors (IκB kinase subunits and bcl-3) are implicated in hematological and solid tumour malignancies. NF-κB appears to be involved in cell proliferation control, apoptosis control, angiogenesis promotion and possibly regulation of diffusion of metastases. There are several reports that inhibition of NF-κB as a therapeutic target may have a role in tumour cell death or growth inhibition. AREA COVERED IN THIS REVIEW We review data about inhibition of NF-κB in acute myeloid leukemia (AML) and myelodysplastic syndromes (MDS). We describe the molecular mechanisms underlying NF-κB deregulation in these haematological malignancies. WHAT THE READER WILL GAIN Constitutive activation of NF-κB in the nucleus has been reported in some varieties of MDS/AML. The in vitro and in vivo results of NF-κB inhibition in myeloid malignancies are highlighted. TAKE HOME MESSAGE NF-κB selective inhibitory drugs may be useful, either as single agents or associated with conventional chemotherapy.
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Affiliation(s)
- Massimo Breccia
- Sapienza University, Department of Human Biotechnologies and Hematology, Rome, Italy.
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Abstract
Activation of nuclear factor (NF)-κB, one of the most investigated transcription factors, has been found to control multiple cellular processes in cancer including inflammation, transformation, proliferation, angiogenesis, invasion, metastasis, chemoresistance and radioresistance. NF-κB is constitutively active in most tumor cells, and its suppression inhibits the growth of tumor cells, leading to the concept of 'NF-κB addiction' in cancer cells. Why NF-κB is constitutively and persistently active in cancer cells is not fully understood, but multiple mechanisms have been delineated including agents that activate NF-κB (such as viruses, viral proteins, bacteria and cytokines), signaling intermediates (such as mutant receptors, overexpression of kinases, mutant oncoproteins, degradation of IκBα, histone deacetylase, overexpression of transglutaminase and iNOS) and cross talk between NF-κB and other transcription factors (such as STAT3, HIF-1α, AP1, SP, p53, PPARγ, β-catenin, AR, GR and ER). As NF-κB is 'pre-active' in cancer cells through unrelated mechanisms, classic inhibitors of NF-κB (for example, bortezomib) are unlikely to mediate their anticancer effects through suppression of NF-κB. This review discusses multiple mechanisms of NF-κB activation and their regulation by multitargeted agents in contrast to monotargeted agents, thus 'one size does not fit all' cancers.
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Dai Y, Guzman ML, Chen S, Wang L, Yeung SK, Pei XY, Dent P, Jordan CT, Grant S. The NF (Nuclear factor)-κB inhibitor parthenolide interacts with histone deacetylase inhibitors to induce MKK7/JNK1-dependent apoptosis in human acute myeloid leukaemia cells. Br J Haematol 2010; 151:70-83. [PMID: 20701602 DOI: 10.1111/j.1365-2141.2010.08319.x] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Interactions between the nuclear factor (NF)-κB inhibitor parthenolide and the pan-histone deacetylase inhibitors (HDACIs) vorinostat and LBH589 were investigated in human acute myeloid leukaemia (AML) cells, including primary AML blasts. Co-administration of parthenolide blocked HDACI-mediated phosphorylation/activation of IKK and RelA/p65 in association with increased JNK1 activation in various AML cell types. These events were accompanied by an increase in apoptosis in multiple AML cell lines (e.g. U937, HL-60, NB4, MV-4-11, and MOLM-13). Significantly, parthenolide also increased HDACI-mediated cell death in haematopoietic cells transduced with the MLL-MLLT1 fusion gene, which exhibit certain leukaemia-initiating cell characteristics, as well as primary AML blasts. Exposure to parthenolide/HDACI regimens clearly inhibited the growth of AML-colony-forming units but was relatively sparing toward normal haematopoietic progenitors. Notably, blockade of c-Jun N-terminal kinase (JNK) signalling by either pharmacological inhibitors or genetic means (e.g. dominant-negative JNK1 or JNK1 shRNA) diminished parthenolide/HDACI-mediated lethality. Moreover, dominant-negative MKK7, but not dominant-negative MKK4/SEK1, blocked JNK1 activation and apoptosis induced by parthenolide/HDACI regimens. Together, these findings indicate that parthenolide potentiates HDACI lethality in human AML cells through a process involving NF-κB inhibition and subsequent MKK7-dependent activation of the SAPK/JNK pathway. They also raise the possibility that this strategy may target leukaemic progenitor cells.
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Affiliation(s)
- Yun Dai
- Division of Hematology/Oncology, Department of Medicine, Virginia Commonwealth University, 401 College Street, Richmond, VA 23298, USA
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Blalock WL, Bavelloni A, Piazzi M, Faenza I, Cocco L. A role for PKR in hematologic malignancies. J Cell Physiol 2010; 223:572-91. [PMID: 20232306 DOI: 10.1002/jcp.22092] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The double-stranded RNA-dependent kinase PKR has been described for many years as strictly a pro-apoptotic kinase. Recent data suggest that the main purpose of this kinase is damage control and repair following stress and, if all else fails, apoptosis. Aberrant activation of PKR has been reported in numerous neurodegenerative diseases and cancer. Although a subset of myelodysplastic syndromes (MDS) and chronic lymphocytic leukemia contain low levels of PKR expression and activity, elevated PKR activity and/or expression have been detected in a wide range of hematologic malignancies, from bone marrow failure disorders to acute leukemia. With the recent findings that cancers containing elevated PKR activity are highly sensitive to PKR inhibition, we explore the role of PKR in hematologic malignancies, signal transduction pathways affected by PKR, and how PKR may contribute to leukemic transformation.
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Affiliation(s)
- William L Blalock
- Department of Human Anatomical Sciences, University of Bologna, Bologna, Italy
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NF-kappaB and cancer: how intimate is this relationship. Mol Cell Biochem 2010; 336:25-37. [PMID: 19823771 PMCID: PMC3148942 DOI: 10.1007/s11010-009-0267-2] [Citation(s) in RCA: 307] [Impact Index Per Article: 21.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2009] [Accepted: 09/15/2009] [Indexed: 02/03/2023]
Abstract
NF-kappaB, a transcription factor first discovered in 1986, is now known to be closely connected to the process of tumorogenesis based on a multiplicity of evidence. (1) NF-kappaB is activated in response to tobacco, stress, dietary agents, obesity, alcohol, infectious agents, irradiation, and environmental stimuli that account for as much as 95% of all cancers. (2) The transcription factor has been linked with transformation of cells. (3) It is constitutively active in most tumor cells. (4) It has also been linked with the survival of cancer stem cells, an early progenitor cell that has acquired self-renewal potential. (5) NF-kappaB regulates the expression of most anti-apoptotic gene products associated with the survival of the tumor. (6) It also regulates the gene products linked with proliferation of tumors. (7) The transcription factor controls the expression of gene products linked with invasion, angiogenesis, and metastasis of cancer. (8) While most carcinogens activate NF-kappaB, most chemopreventive agents suppress its activation. These observations suggest that NF-kappaB is intimately intertwined with cancer growth and metastasis. The mechanism that leads to constitutive activation of NF-kappaB in hematological, gastrointestinal, genitourinary, gynecological, thoracic head and neck, breast, and skin cancers, and the ways NF-kappaB is activated are the topics of discussion in this review.
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Weisberg E, Barrett R, Liu Q, Stone R, Gray N, Griffin JD. FLT3 inhibition and mechanisms of drug resistance in mutant FLT3-positive AML. Drug Resist Updat 2009; 12:81-9. [PMID: 19467916 DOI: 10.1016/j.drup.2009.04.001] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2009] [Revised: 04/16/2009] [Accepted: 04/16/2009] [Indexed: 10/20/2022]
Abstract
An appealing therapeutic target in AML is constitutively activated, mutant FLT3, which is expressed in a subpopulation of AML patients and is generally a poor prognostic indicator in patients under the age of 65. There are currently several FLT3 inhibitors that are undergoing clinical investigation. However, the discovery of drug-resistant leukemic blast cells in FLT3 inhibitor-treated AML patients has prompted the search for novel, structurally diverse FLT3 inhibitors that could be alternatively used to circumvent drug resistance. Here, we provide an overview of FLT3 inhibitors under preclinical and clinical investigation, and we discuss mechanisms whereby AML cells develop resistance to FLT3 inhibitors, and the ways in which combination therapy could potentially be utilized to override drug resistance. We discuss how the cross-talk between major downstream signaling pathways, such as PI3K/PTEN/Akt/mTOR, RAS/Raf/MEK/ERK, and Jak/STAT, can be exploited for therapeutic purposes by targeting key signaling molecules with selective inhibitors, such as mTOR inhibitors, HSP90 inhibitors, or farnesyltransferase inhibitors, and identifying those agents with the ability to positively combine with inhibitors of FLT3, such as PKC412 and sunitinib. With the widespread onset of drug resistance associated with tyrosine kinase inhibitors, due to mechanisms involving development of point mutations or gene amplification of target proteins, the use of a multi-targeted therapeutic approach is of potential clinical benefit.
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Affiliation(s)
- Ellen Weisberg
- Department of Medical Oncology/Hematologic Neoplasia, Dana Farber Cancer Institute, 44 Binney Street, Boston, MA 02115, USA.
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Grosjean-Raillard J, Tailler M, Adès L, Perfettini JL, Fabre C, Braun T, De Botton S, Fenaux P, Kroemer G. ATM mediates constitutive NF-kappaB activation in high-risk myelodysplastic syndrome and acute myeloid leukemia. Oncogene 2008; 28:1099-109. [PMID: 19079347 DOI: 10.1038/onc.2008.457] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The anti-apoptotic transcription factor nuclear factor-kappaB (NF-kappaB) is constitutively activated in CD34(+) myeloblasts from high-risk myelodysplastic syndrome (MDS) and acute myeloid leukemia (AML) patients. Inhibition of NF-kappaB by suppressing the canonical NF-kappaB activation pathway, for instance by knockdown of the three subunits of the inhibitor of NF-kappaB (I kappaB) kinase (IKK) complex (IKK1, IKK2 and NEMO) triggers apoptosis in such cells. Here, we show that an MDS/AML model cell line exhibits a constitutive interaction, within the nucleus, of activated, S1981-phosphorylated ataxia telangiectasia mutated (ATM) with NEMO. Inhibition of ATM with two distinct pharmacological inhibitors suppressed the activating autophosphorylation of ATM, blocked the interaction of ATM and NEMO, delocalized NEMO as well as another putative NF-kappaB activator, PIDD, from the nucleus, abolished the activating phosphorylation of the catalytic proteins of the IKK complex (IKK1/2 on serines 176/180), enhanced the expression of I kappaB alpha and caused the relocalization of NF-kappaB from the nucleus to the cytoplasm, followed by apoptosis. Knockdown of ATM with small-interfering RNAs had a similar effect that could not be enhanced by knockdown of NEMO, PIDD and the p65 NF-kappaB subunit, suggesting that an ATM inhibition/depletion truly induced apoptosis through inhibition of the NF-kappaB system. Pharmacological inhibition of ATM also induced the nucleocytoplasmic relocalization of p65 in malignant myeloblasts purified from patients with high-risk MDS or AML, correlating with the induction of apoptosis. Altogether, these results support the contention that constitutively active ATM accounts for the activation of NF-kappaB in high-risk MDS and AML.
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