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Wang Z, Thakare RP, Chitale S, Mishra AK, Goldstein SI, Fan AC, Li R, Zhu LJ, Brown LE, Cencic R, Huang S, Green MR, Pelletier J, Malonia SK, Porco JA. Identification of Rocaglate Acyl Sulfamides as Selective Inhibitors of Glioblastoma Stem Cells. ACS CENTRAL SCIENCE 2024; 10:1640-1656. [PMID: 39220711 PMCID: PMC11363328 DOI: 10.1021/acscentsci.4c01073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/02/2024] [Revised: 07/22/2024] [Accepted: 07/23/2024] [Indexed: 09/04/2024]
Abstract
Glioblastoma (GBM) is the most aggressive and frequently occurring type of malignant brain tumor in adults. The initiation, progression, and recurrence of malignant tumors are known to be driven by a small subpopulation of cells known as tumor-initiating cells or cancer stem cells (CSCs). GBM CSCs play a pivotal role in orchestrating drug resistance and tumor relapse. As a prospective avenue for GBM intervention, the targeted suppression of GBM CSCs holds considerable promise. In this study, we found that rocaglates, compounds which are known to inhibit translation via targeting of the DEAD-box helicase eIF4A, exert a robust, dose-dependent cytotoxic impact on GBM CSCs with minimal killing of nonstem GBM cells. Subsequent optimization identified novel rocaglate derivatives (rocaglate acyl sulfamides or Roc ASFs) that selectively inhibit GBM CSCs with nanomolar EC50 values. Furthermore, comparative evaluation of a lead CSC-optimized Roc ASF across diverse mechanistic and target profiling assays revealed suppressed translation inhibition relative to that of other CSC-selective rocaglates, with enhanced targeting of the DEAD-box helicase DDX3X, a recently identified secondary target of rocaglates. Overall, these findings suggest a promising therapeutic strategy for targeting GBM CSCs.
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Affiliation(s)
- Zihao Wang
- Department
of Chemistry and Center for Molecular Discovery (BU-CMD), Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215, United States
| | - Ritesh P. Thakare
- Department
of Molecular, Cell and Cancer Biology, University
of Massachusetts Chan Medical School, Worcester, Massachusetts 01605, United States
| | - Shalaka Chitale
- Department
of Molecular, Cell and Cancer Biology, University
of Massachusetts Chan Medical School, Worcester, Massachusetts 01605, United States
| | - Alok K. Mishra
- Department
of Molecular, Cell and Cancer Biology, University
of Massachusetts Chan Medical School, Worcester, Massachusetts 01605, United States
| | - Stanley I. Goldstein
- Boston
University Target Discovery Laboratory (BU-TDL), Boston, Massachusetts 02215, United States
- Department
of Pharmacology, Physiology, and Biophysics, Boston University, Boston, Massachusetts 02118, United States
| | - Alice C. Fan
- Department
of Chemistry and Center for Molecular Discovery (BU-CMD), Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215, United States
- Boston
University Target Discovery Laboratory (BU-TDL), Boston, Massachusetts 02215, United States
| | - Rui Li
- Department
of Molecular, Cell and Cancer Biology, University
of Massachusetts Chan Medical School, Worcester, Massachusetts 01605, United States
- Department
of Molecular Medicine and Program in Bioinformatics and Integrative
Biology, University of Massachusetts Chan
Medical School, Worcester, Massachusetts 01605, United States
| | - Lihua Julie Zhu
- Department
of Molecular, Cell and Cancer Biology, University
of Massachusetts Chan Medical School, Worcester, Massachusetts 01605, United States
- Department
of Molecular Medicine and Program in Bioinformatics and Integrative
Biology, University of Massachusetts Chan
Medical School, Worcester, Massachusetts 01605, United States
| | - Lauren E. Brown
- Department
of Chemistry and Center for Molecular Discovery (BU-CMD), Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215, United States
| | - Regina Cencic
- Department
of Biochemistry, McGill University, Montreal, QC H3G 1Y6, Canada
| | - Sidong Huang
- Department
of Biochemistry, McGill University, Montreal, QC H3G 1Y6, Canada
| | - Michael R. Green
- Department
of Molecular, Cell and Cancer Biology, University
of Massachusetts Chan Medical School, Worcester, Massachusetts 01605, United States
| | - Jerry Pelletier
- Department
of Biochemistry, McGill University, Montreal, QC H3G 1Y6, Canada
| | - Sunil K. Malonia
- Department
of Molecular, Cell and Cancer Biology, University
of Massachusetts Chan Medical School, Worcester, Massachusetts 01605, United States
| | - John A. Porco
- Department
of Chemistry and Center for Molecular Discovery (BU-CMD), Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215, United States
- Boston
University Target Discovery Laboratory (BU-TDL), Boston, Massachusetts 02215, United States
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2
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Zhang H, Mañán-Mejías PM, Miles HN, Putnam AA, MacGillivray LR, Ricke WA. DDX3X and Stress Granules: Emerging Players in Cancer and Drug Resistance. Cancers (Basel) 2024; 16:1131. [PMID: 38539466 PMCID: PMC10968774 DOI: 10.3390/cancers16061131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Revised: 03/09/2024] [Accepted: 03/11/2024] [Indexed: 05/02/2024] Open
Abstract
The DEAD (Asp-Glu-Ala-Asp)-box helicase 3 X-linked (DDX3X) protein participates in many aspects of mRNA metabolism and stress granule (SG) formation. DDX3X has also been associated with signal transduction and cell cycle regulation that are important in maintaining cellular homeostasis. Malfunctions of DDX3X have been implicated in multiple cancers, including brain cancer, leukemia, prostate cancer, and head and neck cancer. Recently, literature has reported SG-associated cancer drug resistance, which correlates with a negative disease prognosis. Based on the connections between DDX3X, SG formation, and cancer pathology, targeting DDX3X may be a promising direction for cancer therapeutics development. In this review, we describe the biological functions of DDX3X in terms of mRNA metabolism, signal transduction, and cell cycle regulation. Furthermore, we summarize the contributions of DDX3X in SG formation and cellular stress adaptation. Finally, we discuss the relationships of DDX3X, SG, and cancer drug resistance, and discuss the current research progress of several DDX3X inhibitors for cancer treatment.
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Affiliation(s)
- Han Zhang
- Division of Pharmaceutical Sciences, School of Pharmacy, University of Wisconsin-Madison, Madison, WI 53705, USA
| | - Paula M. Mañán-Mejías
- Division of Pharmaceutical Sciences, School of Pharmacy, University of Wisconsin-Madison, Madison, WI 53705, USA
| | - Hannah N. Miles
- Division of Pharmaceutical Sciences, School of Pharmacy, University of Wisconsin-Madison, Madison, WI 53705, USA
| | - Andrea A. Putnam
- Department of Biomolecular Chemistry, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI 53705, USA
| | | | - William A. Ricke
- Division of Pharmaceutical Sciences, School of Pharmacy, University of Wisconsin-Madison, Madison, WI 53705, USA
- Department of Urology, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI 53705, USA
- George M. O’Brien Urology Research Center of Excellence, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI 53705, USA
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3
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Jansen J, Kroeze S, Man S, Andreini M, Bakker JW, Zamperini C, Tarditi A, Kootstra NA, Geijtenbeek TBH. Noncanonical-NF-κB activation and DDX3 inhibition reduces the HIV-1 reservoir by elimination of latently infected cells ex-vivo. Microbiol Spectr 2024; 12:e0318023. [PMID: 38051053 PMCID: PMC10783037 DOI: 10.1128/spectrum.03180-23] [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: 08/24/2023] [Accepted: 10/28/2023] [Indexed: 12/07/2023] Open
Abstract
IMPORTANCE HIV-1 continues to be a major global health challenge. Current HIV-1 treatments are effective but need lifelong adherence. An HIV-1 cure should eliminate the latent viral reservoir that persists in people living with HIV-1. Different methods have been investigated that focus on reactivation and subsequent elimination of the HIV-1 reservoir, and it is becoming clear that a combination of compounds with different mechanisms of actions might be more effective. Here, we target two host factors, inhibitor of apoptosis proteins that control apoptosis and the DEAD-box helicase DDX3, facilitating HIV mRNA transport/translation. We show that targeting of these host factors with SMAC mimetics and DDX3 inhibitors induce reversal of viral latency and eliminate HIV-1-infected cells in vitro and ex vivo.
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Affiliation(s)
- Jade Jansen
- Department of Experimental Immunology, Amsterdam UMC Location University of Amsterdam, Amsterdam, the Netherlands
- Amsterdam Institute for Infection and Immunity, Amsterdam, the Netherlands
| | - Stefanie Kroeze
- Department of Experimental Immunology, Amsterdam UMC Location University of Amsterdam, Amsterdam, the Netherlands
- Amsterdam Institute for Infection and Immunity, Amsterdam, the Netherlands
| | - Shirley Man
- Department of Experimental Immunology, Amsterdam UMC Location University of Amsterdam, Amsterdam, the Netherlands
- Amsterdam Institute for Infection and Immunity, Amsterdam, the Netherlands
| | - Matteo Andreini
- First Health Pharmaceuticals B.V, Amsterdam, the Netherlands
| | | | | | - Alessia Tarditi
- First Health Pharmaceuticals B.V, Amsterdam, the Netherlands
| | - Neeltje A. Kootstra
- Department of Experimental Immunology, Amsterdam UMC Location University of Amsterdam, Amsterdam, the Netherlands
- Amsterdam Institute for Infection and Immunity, Amsterdam, the Netherlands
| | - Teunis B. H. Geijtenbeek
- Department of Experimental Immunology, Amsterdam UMC Location University of Amsterdam, Amsterdam, the Netherlands
- Amsterdam Institute for Infection and Immunity, Amsterdam, the Netherlands
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4
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Fatti E, Hirth A, Švorinić A, Günther M, Stier G, Cruciat CM, Acebrón SP, Papageorgiou D, Sinning I, Krijgsveld J, Höfer T, Niehrs C. DEAD box RNA helicases act as nucleotide exchange factors for casein kinase 2. Sci Signal 2023; 16:eabp8923. [PMID: 37098120 DOI: 10.1126/scisignal.abp8923] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/27/2023]
Abstract
DDX RNA helicases promote RNA processing, but DDX3X also activates casein kinase 1 (CK1ε). We show that other DDX proteins also stimulate the protein kinase activity of CK1ε and that this extends to casein kinase 2 (CK2). CK2 enzymatic activity was stimulated by various DDX proteins at high substrate concentrations. DDX1, DDX24, DDX41, and DDX54 were required for full kinase activity in vitro and in Xenopus embryos. Mutational analysis of DDX3X indicated that CK1 and CK2 kinase stimulation engages its RNA binding but not catalytic motifs. Mathematical modeling of enzyme kinetics and stopped-flow spectroscopy showed that DDX proteins function as nucleotide exchange factors toward CK2 and reduce unproductive reaction intermediates and substrate inhibition. Our study reveals protein kinase stimulation by nucleotide exchange as important for kinase regulation and as a generic function of DDX proteins.
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Affiliation(s)
- Edoardo Fatti
- Division of Molecular Embryology, DKFZ-ZMBH-Alliance, Deutsches Krebsforschungszentrum (DKFZ), 69120 Heidelberg, Germany
- Faculty of Biosciences, Ruprecht-Karls University of Heidelberg, 69120 Heidelberg, Germany
| | - Alexander Hirth
- Division of Molecular Embryology, DKFZ-ZMBH-Alliance, Deutsches Krebsforschungszentrum (DKFZ), 69120 Heidelberg, Germany
- Faculty of Biosciences, Ruprecht-Karls University of Heidelberg, 69120 Heidelberg, Germany
| | - Andrea Švorinić
- Division of Molecular Embryology, DKFZ-ZMBH-Alliance, Deutsches Krebsforschungszentrum (DKFZ), 69120 Heidelberg, Germany
- Faculty of Biosciences, Ruprecht-Karls University of Heidelberg, 69120 Heidelberg, Germany
- Heidelberg University Biochemistry Center (BZH), 69120 Heidelberg, Germany
| | - Matthias Günther
- Division of Theoretical Systems Biology, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany
| | - Gunter Stier
- Heidelberg University Biochemistry Center (BZH), 69120 Heidelberg, Germany
| | - Cristina-Maria Cruciat
- Division of Molecular Embryology, DKFZ-ZMBH-Alliance, Deutsches Krebsforschungszentrum (DKFZ), 69120 Heidelberg, Germany
| | - Sergio P Acebrón
- Division of Molecular Embryology, DKFZ-ZMBH-Alliance, Deutsches Krebsforschungszentrum (DKFZ), 69120 Heidelberg, Germany
| | - Dimitris Papageorgiou
- Proteomics of Stem Cells and Cancer, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 581, 69120 Heidelberg, Germany
- Medical Faculty, Heidelberg University, Im Neuenheimer Feld 672, 69120 Heidelberg, Germany
| | - Irmgard Sinning
- Heidelberg University Biochemistry Center (BZH), 69120 Heidelberg, Germany
| | - Jeroen Krijgsveld
- Proteomics of Stem Cells and Cancer, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 581, 69120 Heidelberg, Germany
- Medical Faculty, Heidelberg University, Im Neuenheimer Feld 672, 69120 Heidelberg, Germany
| | - Thomas Höfer
- Division of Theoretical Systems Biology, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany
| | - Christof Niehrs
- Division of Molecular Embryology, DKFZ-ZMBH-Alliance, Deutsches Krebsforschungszentrum (DKFZ), 69120 Heidelberg, Germany
- Institute of Molecular Biology (IMB), 55128 Mainz, Germany
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5
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Gao S, Han B, Xu B, Wang N, Zhang Y, Liu X, Zhang M, Wang G, Guan X, Huang J, Liu M, Shi W. SAV Nsp2 regulates NF-κB signaling to induce inflammatory responses by targeting host DDX3. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2023; 140:104612. [PMID: 36473548 DOI: 10.1016/j.dci.2022.104612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 12/02/2022] [Accepted: 12/02/2022] [Indexed: 06/17/2023]
Abstract
Salmon alphavirus (SAV) infection leads to severe pancreas disease (PD) with typical inflammatory responses in Atlantic salmon (Salmo salar) and rainbow trout (Oncorhynchus mykiss). Nsp2, an important nonstructural protein of SAV, can activate NF-κB signaling pathway to reduce inflammatory responses. However, the molecular mechanism remains unclear. In this study, the ML (279-421aa) of Nsp2 was revealed to be the key domain for activating NF-κB. We focused on a host protein, DEAD-box RNA helicase 3 (DDX3), that may interact with Nsp2 to regulate NF-κB-induced inflammatory. The interaction between DDX3 and Nsp2 was confirmed in vitro. Overexpression of DDX3 inhibited the activation of NF-κB by Nsp2. SAV Nsp2 relieves the inhibitory effect of DDX3 on NF-κB, thereby initiating the innate immune response. This study revealed the molecular mechanism of Nsp2-induced inflammatory response by targeting DDX3 to activate NF-κB, providing a theoretical basis for revealing the underlying infection mechanism and pathogenesis of SAV.
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Affiliation(s)
- Shuai Gao
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, 150030, PR China
| | - Bing Han
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, 150030, PR China
| | - Baoxing Xu
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, 150030, PR China
| | - Na Wang
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, 150030, PR China
| | - Yanru Zhang
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, 150030, PR China
| | - Xuefei Liu
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, 150030, PR China
| | - Mengmeng Zhang
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, 150030, PR China
| | - Guanbo Wang
- Wellcome-Wolfson Institute for Exprerimental Medicine Queen's University Belfast, 97 Lisburn Rd, Belfast, BT9 7BL, UK
| | - Xueting Guan
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, 150030, PR China
| | - Jinshan Huang
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, 150030, PR China
| | - Min Liu
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, 150030, PR China.
| | - Wen Shi
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, 150030, PR China.
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6
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Rosendo Machado S, Qu J, Koopman WJH, Miesen P. The DEAD-box RNA helicase Dhx15 controls glycolysis and arbovirus replication in Aedes aegypti mosquito cells. PLoS Pathog 2022; 18:e1010694. [PMID: 36441781 PMCID: PMC9731432 DOI: 10.1371/journal.ppat.1010694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 12/08/2022] [Accepted: 11/11/2022] [Indexed: 11/30/2022] Open
Abstract
Aedes aegypti mosquitoes are responsible for the transmission of arthropod-borne (arbo)viruses including dengue and chikungunya virus (CHIKV) but in contrast to human hosts, arbovirus-infected mosquitoes are able to efficiently control virus replication to sub-pathological levels. Yet, our knowledge of the molecular interactions of arboviruses with their mosquito hosts is incomplete. Here, we aimed to identify and characterize novel host genes that control arbovirus replication in Aedes mosquitoes. RNA binding proteins (RBPs) are well-known to regulate immune signaling pathways in all kingdoms of life. We therefore performed a knockdown screen targeting 461 genes encoding predicted RBPs in Aedes aegypti Aag2 cells and identified 15 genes with antiviral activity against Sindbis virus. Amongst these, the three DEAD-box RNA helicases AAEL004419/Dhx15, AAEL008728, and AAEL004859 also acted as antiviral factors in dengue and CHIKV infections. Here, we explored the mechanism of Dhx15 in regulating an antiviral transcriptional response in mosquitoes by silencing Dhx15 in Aag2 cells followed by deep-sequencing of poly-A enriched RNAs. Dhx15 knockdown in uninfected and CHIKV-infected cells resulted in differential expression of 856 and 372 genes, respectively. Interestingly, amongst the consistently downregulated genes, glycolytic process was the most enriched gene ontology (GO) term as the expression of all core enzymes of the glycolytic pathway was reduced, suggesting that Dhx15 regulates glycolytic function. A decrease in lactate production indicated that Dhx15 silencing indeed functionally impaired glycolysis. Modified rates of glycolytic metabolism have been implicated in controlling the replication of several classes of viruses and strikingly, infection of Aag2 cells with CHIKV by itself also resulted in the decrease of several glycolytic genes. Our data suggests that Dhx15 regulates replication of CHIKV, and possibly other arboviruses, by controlling glycolysis in mosquito cells.
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Affiliation(s)
- Samara Rosendo Machado
- Department of Medical Microbiology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Jieqiong Qu
- Department of Medical Microbiology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Werner J. H. Koopman
- Department of Pediatrics, Amalia Children’s Hospital, Radboud Institute for Molecular Life Sciences, Radboud Center for Mitochondrial Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Pascal Miesen
- Department of Medical Microbiology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
- * E-mail:
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7
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Secchi M, Lodola C, Garbelli A, Bione S, Maga G. DEAD-Box RNA Helicases DDX3X and DDX5 as Oncogenes or Oncosuppressors: A Network Perspective. Cancers (Basel) 2022; 14:cancers14153820. [PMID: 35954483 PMCID: PMC9367324 DOI: 10.3390/cancers14153820] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 08/01/2022] [Accepted: 08/04/2022] [Indexed: 11/16/2022] Open
Abstract
Simple Summary The transformation of a normal cell into a cancerous one is caused by the deregulation of different metabolic pathways, involving a complex network of protein–protein interactions. The cellular enzymes DDX3X and DDX5 play important roles in the maintenance of normal cell metabolism, but their deregulation can accelerate tumor transformation. Both DDX3X and DDX5 interact with hundreds of different cellular proteins, and depending on the specific pathways in which they are involved, both proteins can either act as suppressors of cancer or as oncogenes. In this review, we summarize the current knowledge about the roles of DDX3X and DDX5 in different tumors. In addition, we present a list of interacting proteins and discuss the possible contribution of some of these protein–protein interactions in determining the roles of DDX3X and DDX5 in the process of cancer proliferation, also suggesting novel hypotheses for future studies. Abstract RNA helicases of the DEAD-box family are involved in several metabolic pathways, from transcription and translation to cell proliferation, innate immunity and stress response. Given their multiple roles, it is not surprising that their deregulation or mutation is linked to different pathological conditions, including cancer. However, while in some cases the loss of function of a given DEAD-box helicase promotes tumor transformation, indicating an oncosuppressive role, in other contexts the overexpression of the same enzyme favors cancer progression, thus acting as a typical oncogene. The roles of two well-characterized members of this family, DDX3X and DDX5, as both oncogenes and oncosuppressors have been documented in several cancer types. Understanding the interplay of the different cellular contexts, as defined by the molecular interaction networks of DDX3X and DDX5 in different tumors, with the cancer-specific roles played by these proteins could help to explain their apparently conflicting roles as cancer drivers or suppressors.
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8
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De Colibus L, Stunnenberg M, Geijtenbeek TB. DDX3X structural analysis: Implications in the pharmacology and innate immunity. CURRENT RESEARCH IN IMMUNOLOGY 2022; 3:100-109. [PMID: 35647523 PMCID: PMC9133689 DOI: 10.1016/j.crimmu.2022.05.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 05/01/2022] [Accepted: 05/04/2022] [Indexed: 11/13/2022] Open
Abstract
The human DEAD-Box Helicase 3 X-Linked (DDX3X) is an ATP-dependent RNA helicase involved in virtually every step of RNA metabolism, ranging from transcription regulation in the nucleus to translation initiation and stress granule (SG) formation, and plays crucial roles in innate immunity, as well as tumorigenesis and viral infections. This review discusses latest advances in DDX3X biology and structure-function relationship, including the implications of the recent DDX3X crystal structure in complex with double stranded RNA for RNA metabolism, DDX3X involvement in the cross-talk between innate immune responses and cell stress adaptation, and the roles of DDX3X in controlling cell fate. The human DDX3X, an ATP-dependent RNA helicase, plays a central role in a variety of cellular processes involving RNA. DDX3X is implicated in antiviral signalling pathways. DDX3X interacts with full-length NLRP3 and its NACHT domain. The recent crystal structure of DDX3X in complex with dsRNA offers a model for understanding its binding to the HIV-1 TAR hairpin sequence.
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9
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DEAD/H-box helicases:Anti-viral and pro-viral roles during infections. Virus Res 2021; 309:198658. [PMID: 34929216 DOI: 10.1016/j.virusres.2021.198658] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 11/26/2021] [Accepted: 12/14/2021] [Indexed: 02/08/2023]
Abstract
DEAD/H-box RNA helicases make the prominent family of helicases super family-2 which take part in almost all RNA-related processes, from initiation of transcription to RNA decay pathways. In addition to these RNA-related activities, in recent years a certain number of these helicases are reported to play important roles in anti-viral immunity through various ways. Along with RLHs, endosomal TLRs, and cytosolic DNA receptors, many RNA helicases including DDX3, DHX9, DDX6, DDX41, DHX33, DDX60, DHX36 and DDX1-DDX21-DHX36 complex act as viral nucleic acid sensors or co-sensors. These helicases mostly follow RLHs-MAVS and STING mediated signaling cascades to trigger induction of type-I interferons and pro-inflammatory cytokines. Many of them also function as downstream adaptor molecules (DDX3), segments of stress and processing bodies (DDX3 and DDX6) or negative regulators (DDX19, DDX24, DDX25, DDX39A and DDX46). On the contrary, many studies indicated that several DEAD/H-box helicases such as DDX1, DDX3, DDX6, DDX24, and DHX9 could be exploited by viruses to evade innate immune responses, suggesting that these helicases seem to have a dual function as anti-viral innate immune mediators and viral replication cofactors. In this review, we summarized the current knowledge on several representative DEAD/H-box helicases, with an emphasis on their functions in innate immunity responses, involved in their anti-viral and pro-viral roles.
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10
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Su C, Tang YD, Zheng C. DExD/H-box helicases: multifunctional regulators in antiviral innate immunity. Cell Mol Life Sci 2021; 79:2. [PMID: 34910251 PMCID: PMC8671602 DOI: 10.1007/s00018-021-04072-6] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 11/29/2021] [Accepted: 12/01/2021] [Indexed: 02/07/2023]
Abstract
DExD/H-box helicases play critical roles in multiple cellular processes, including transcription, cellular RNA metabolism, translation, and infections. Several seminal studies over the past decades have delineated the distinct functions of DExD/H-box helicases in regulating antiviral innate immune signaling pathways, including Toll-like receptors, retinoic acid-inducible gene I-like receptors, cyclic GMP-AMP synthase-the stimulator of interferon gene, and NOD-like receptors signaling pathways. Besides the prominent regulatory roles, there is increasing attention on their functions as nucleic acid sensors involved in antiviral innate immunity. Here we summarize the complex regulatory roles of DExD/H-box helicases in antiviral innate immunity. A better understanding of the underlying molecular mechanisms of DExD/H-box helicases' regulatory roles is vital for developing new therapeutics targeting DExD/H-box helicases and their mediated signaling transduction in viral infectious diseases.
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Affiliation(s)
- Chenhe Su
- Department of Immunology, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, China
- The Wistar Institute, Philadelphia, PA, USA
| | - Yan-Dong Tang
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute of Chinese Academy of Agricultural Sciences, Harbin, China
| | - Chunfu Zheng
- Department of Immunology, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, China.
- Department of Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, AB, Canada.
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11
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He X, Li T, Qin K, Luo S, Li Z, Ji Q, Song H, He H, Tang H, Han C, Li H, Luo Y. Demalonylation of DDX3 by Sirtuin 5 promotes antiviral innate immune responses. Am J Cancer Res 2021; 11:7235-7246. [PMID: 34158847 PMCID: PMC8210596 DOI: 10.7150/thno.52934] [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: 09/06/2020] [Accepted: 05/08/2021] [Indexed: 12/25/2022] Open
Abstract
Rationale: Hosts defend against viral infection by sensing viral pathogen-associated molecular patterns and activating antiviral innate immunity through TBK1-IRF3 signaling. However, the underlying molecular mechanism remains unclear. Methods: SiRNAs targeting Sirt1-7 were transfected into macrophages to screen the antiviral function. Sirt5 deficient mice or macrophages were subjected to viral infection to assess in vivo and in vitro function of Sirt5 by detecting cytokines, viral replicates and survival rate. Immunoprecipitation, WesternBlot and luciferase reporter assay were used to reveal molecular mechanism. Results: In this study, we functionally screened seven Sirtuin family members, and found that Sirtuin5 (Sirt5) promotes antiviral signaling and responses. Sirt5 deficiency leads to attenuated antiviral innate immunity in vivo and in vitro upon viral infection by decreasing TBK1-IRF3 activation and type I IFN production. Sirt5 overexpression increased antiviral innate immunity. Mechanism investigation revealed that Sirt5 interacts with DDX3 and demalonylates DDX3, which is critical for TBK1-IRF3 activation. Mutation of the demalonylation lysine sites (K66, K130, and K162) of DDX3 increased ifnβ transcription. Furthermore, the acetylation on lysine 118 of DDX3 positively regulated ifnβ transcription, whereas Sirt5 could not deacetylate this site. Conclusion: Sirt5 promotes anti- RNA and DNA virus innate immune responses by increasing TBK1 signaling through demalonylating DDX3, which identifies a novel regulatory pathway of antiviral innate immune response.
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12
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Selective cell death in HIV-1-infected cells by DDX3 inhibitors leads to depletion of the inducible reservoir. Nat Commun 2021; 12:2475. [PMID: 33931637 PMCID: PMC8087668 DOI: 10.1038/s41467-021-22608-z] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Accepted: 03/15/2021] [Indexed: 02/02/2023] Open
Abstract
An innovative approach to eliminate HIV-1-infected cells emerging out of latency, the major hurdle to HIV-1 cure, is to pharmacologically reactivate viral expression and concomitantly trigger intracellular pro-apoptotic pathways in order to selectively induce cell death (ICD) of infected cells, without reliance on the extracellular immune system. In this work, we demonstrate the effect of DDX3 inhibitors on selectively inducing cell death in latent HIV-1-infected cell lines, primary CD4+ T cells and in CD4+ T cells from cART-suppressed people living with HIV-1 (PLWHIV). We used single-cell FISH-Flow technology to characterise the contribution of viral RNA to inducing cell death. The pharmacological targeting of DDX3 induced HIV-1 RNA expression, resulting in phosphorylation of IRF3 and upregulation of IFNβ. DDX3 inhibition also resulted in the downregulation of BIRC5, critical to cell survival during HIV-1 infection, and selectively induced apoptosis in viral RNA-expressing CD4+ T cells but not bystander cells. DDX3 inhibitor treatment of CD4+ T cells from PLWHIV resulted in an approximately 50% reduction of the inducible latent HIV-1 reservoir by quantitation of HIV-1 RNA, by FISH-Flow, RT-qPCR and TILDA. This study provides proof of concept for pharmacological reversal of latency coupled to induction of apoptosis towards the elimination of the inducible reservoir.
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Mann M, Roberts DS, Zhu Y, Li Y, Zhou J, Ge Y, Brasier AR. Discovery of RSV-Induced BRD4 Protein Interactions Using Native Immunoprecipitation and Parallel Accumulation-Serial Fragmentation (PASEF) Mass Spectrometry. Viruses 2021; 13:v13030454. [PMID: 33799525 PMCID: PMC8000986 DOI: 10.3390/v13030454] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 03/08/2021] [Accepted: 03/09/2021] [Indexed: 12/19/2022] Open
Abstract
Respiratory Syncytial Virus (RSV) causes severe inflammation and airway pathology in children and the elderly by infecting the epithelial cells of the upper and lower respiratory tract. RSV replication is sensed by intracellular pattern recognition receptors upstream of the IRF and NF-κB transcription factors. These proteins coordinate an innate inflammatory response via Bromodomain-containing protein 4 (BRD4), a protein that functions as a scaffold for unknown transcriptional regulators. To better understand the pleiotropic regulatory function of BRD4, we examine the BRD4 interactome and identify how RSV infection dynamically alters it. To accomplish these goals, we leverage native immunoprecipitation and Parallel Accumulation—Serial Fragmentation (PASEF) mass spectrometry to examine BRD4 complexes isolated from human alveolar epithelial cells in the absence or presence of RSV infection. In addition, we explore the role of BRD4’s acetyl-lysine binding bromodomains in mediating these interactions by using a highly selective competitive bromodomain inhibitor. We identify 101 proteins that are significantly enriched in the BRD4 complex and are responsive to both RSV-infection and BRD4 inhibition. These proteins are highly enriched in transcription factors and transcriptional coactivators. Among them, we identify members of the AP1 transcription factor complex, a complex important in innate signaling and cell stress responses. We independently confirm the BRD4/AP1 interaction in primary human small airway epithelial cells. We conclude that BRD4 recruits multiple transcription factors during RSV infection in a manner dependent on acetyl-lysine binding domain interactions. This data suggests that BRD4 recruits transcription factors to target its RNA processing complex to regulate gene expression in innate immunity and inflammation.
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Affiliation(s)
- Morgan Mann
- Department of Medicine, University of Wisconsin-Madison School of Medicine and Public Health (SMPH), Madison, WI 53705, USA;
| | - David S. Roberts
- Department of Chemistry, University of Wisconsin-Madison, Madison, WI 53706, USA; (D.S.R.); (Y.G.)
| | - Yanlong Zhu
- Human Proteomics Program, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI 53705, USA;
- Department of Cell and Regenerative Biology, University of Wisconsin-Madison, Madison, WI 53705, USA
| | - Yi Li
- Department of Pharmacology and Toxicology, University of Texas Medical Branch, Galveston, TX 77550, USA; (Y.L.); (J.Z.)
| | - Jia Zhou
- Department of Pharmacology and Toxicology, University of Texas Medical Branch, Galveston, TX 77550, USA; (Y.L.); (J.Z.)
| | - Ying Ge
- Department of Chemistry, University of Wisconsin-Madison, Madison, WI 53706, USA; (D.S.R.); (Y.G.)
- Human Proteomics Program, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI 53705, USA;
- Department of Cell and Regenerative Biology, University of Wisconsin-Madison, Madison, WI 53705, USA
| | - Allan R. Brasier
- Institute for Clinical and Translational Research (ICTR), University of Wisconsin-Madison, Madison, WI 53705, USA
- Correspondence: ; Tel.: +1-608-263-7371
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14
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Li N, Jiang S, Zhao J, Yang Y, Deng K, Wei L, Cai Y, Li B, Liu S. Molecular identification of duck DDX3X and its potential role in response to Tembusu virus. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2020; 106:103599. [PMID: 31899305 DOI: 10.1016/j.dci.2019.103599] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 12/24/2019] [Accepted: 12/24/2019] [Indexed: 06/10/2023]
Abstract
ATP-dependent DEAD (Asp-Glu-Ala-Asp)-box RNA helicases not only regulate RNA metabolism, but also are involved in host antiviral innate immune responses. It is important to investigate the orthologs of this protein family to broaden our understanding of innate immunity and promote protective strategies against viral infections in ducks. In the current study, duck DDX3X (duDDX3X) was first cloned, which consists of 1959 bp encoding a protein of 652 amino acids. duDDX3X has the typical structure of this family, including nine motifs, DEAD and HELICc domains. The amino acid sequence of duDDX3X shares a high similarity with the DDX3Xs of avian and mammalian. Quantitative real-time PCR indicated that duDDX3X was ubiquitously expressed in nearly all tissues. Overexpression of duDDX3X could activate interferon (IFN)-β and enhance the RIG-I-induced IFN-β yield in duck embryo fibroblast cells. However, duDDX3X had no significant effect on the expression of proinflammatory cytokines such as IL-1β, IL-6, and CXCL-8. Tembusu virus (TMUV) infection significantly downregulated duDDX3X. Overexpression and siRNA interference studies showed that duDDX3X inhibited the replication of TMUV through IFN-β at the early stages of infection. Collectively, our results indicated that duDDX3X could positively modulate type I interferon and play an essential role in response to TMUV infection. This study will contribute to a better understanding of duDDX3X in the innate immune system of ducks and lay a solid foundation for further studies of duDDX3X in antiviral immunity.
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Affiliation(s)
- Ning Li
- College of Animal Science and Technology, Shandong Agricultural University, 61 Daizong Road, Taian City, 271018, Shandong Province, China; Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Taian City, 271018, Shandong Province, China; Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Taian City, 271018, Shandong Province, China
| | - Shengnan Jiang
- College of Animal Science and Technology, Shandong Agricultural University, 61 Daizong Road, Taian City, 271018, Shandong Province, China; Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Taian City, 271018, Shandong Province, China; Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Taian City, 271018, Shandong Province, China
| | - Jun Zhao
- College of Animal Science and Technology, Shandong Agricultural University, 61 Daizong Road, Taian City, 271018, Shandong Province, China; Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Taian City, 271018, Shandong Province, China; Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Taian City, 271018, Shandong Province, China
| | - Yudong Yang
- College of Animal Science and Technology, Shandong Agricultural University, 61 Daizong Road, Taian City, 271018, Shandong Province, China; Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Taian City, 271018, Shandong Province, China; Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Taian City, 271018, Shandong Province, China
| | - Kai Deng
- College of Animal Science and Technology, Shandong Agricultural University, 61 Daizong Road, Taian City, 271018, Shandong Province, China; Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Taian City, 271018, Shandong Province, China; Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Taian City, 271018, Shandong Province, China
| | - Liangmeng Wei
- College of Animal Science and Technology, Shandong Agricultural University, 61 Daizong Road, Taian City, 271018, Shandong Province, China; Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Taian City, 271018, Shandong Province, China; Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Taian City, 271018, Shandong Province, China
| | - Yumei Cai
- College of Animal Science and Technology, Shandong Agricultural University, 61 Daizong Road, Taian City, 271018, Shandong Province, China; Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Taian City, 271018, Shandong Province, China; Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Taian City, 271018, Shandong Province, China
| | - Baoquan Li
- College of Animal Science and Technology, Shandong Agricultural University, 61 Daizong Road, Taian City, 271018, Shandong Province, China; Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Taian City, 271018, Shandong Province, China; Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Taian City, 271018, Shandong Province, China.
| | - Sidang Liu
- College of Animal Science and Technology, Shandong Agricultural University, 61 Daizong Road, Taian City, 271018, Shandong Province, China; Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Taian City, 271018, Shandong Province, China; Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Taian City, 271018, Shandong Province, China.
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15
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DEAD-box RNA Helicase DDX3: Functional Properties and Development of DDX3 Inhibitors as Antiviral and Anticancer Drugs. Molecules 2020; 25:molecules25041015. [PMID: 32102413 PMCID: PMC7070539 DOI: 10.3390/molecules25041015] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Revised: 02/05/2020] [Accepted: 02/21/2020] [Indexed: 12/11/2022] Open
Abstract
This short review is focused on enzymatic properties of human ATP-dependent RNA helicase DDX3 and the development of antiviral and anticancer drugs targeting cellular helicases. DDX3 belongs to the DEAD-box proteins, a large family of RNA helicases that participate in all aspects of cellular processes, such as cell cycle progression, apoptosis, innate immune response, viral replication, and tumorigenesis. DDX3 has a variety of functions in the life cycle of different viruses. DDX3 helicase is required to facilitate both the Rev-mediated export of unspliced/partially spliced human immunodeficiency virus (HIV) RNA from nucleus and Tat-dependent translation of viral genes. DDX3 silencing blocks the replication of HIV, HCV, and some other viruses. On the other hand, DDX displays antiviral effect against Dengue virus and hepatitis B virus through the stimulation of interferon beta production. The role of DDX3 in different types of cancer is rather controversial. DDX3 acts as an oncogene in one type of cancer, but demonstrates tumor suppressor properties in other types. The human DDX3 helicase is now considered as a new attractive target for the development of novel pharmaceutical drugs. The most interesting inhibitors of DDX3 helicase and the mechanisms of their actions as antiviral or anticancer drugs are discussed in this short review.
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16
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Piciw J, Winters A, Drewes‐Tartarotti T, Bowman J, Whitworth G, Hilliker A. Identification of
DED1
Suppressors Using Genomic Sequencing. FASEB J 2019. [DOI: 10.1096/fasebj.2019.33.1_supplement.629.6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | | | | | - John Bowman
- BiologyWashington and Lee UniversityLexingtonVA
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17
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From the magic bullet to the magic target: exploiting the diverse roles of DDX3X in viral infections and tumorigenesis. Future Med Chem 2019; 11:1357-1381. [PMID: 30816053 DOI: 10.4155/fmc-2018-0451] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
DDX3X is an ATPase/RNA helicase of the DEAD-box family and one of the most multifaceted helicases known up to date, acting in RNA metabolism, cell cycle control, apoptosis, stress response and innate immunity. Depending on the virus or the viral cycle stage, DDX3X can act either in a proviral fashion or as an antiviral factor. Similarly, in different cancer types, it can act either as an oncogene or a tumor-suppressor gene. Accumulating evidence indicated that DDX3X can be considered a promising target for anticancer and antiviral chemotherapy, but also that its exploitation requires a deeper understanding of the molecular mechanisms underlying its dual role in cancer and viral infections. In this Review, we will summarize the known roles of DDX3X in different tumor types and viral infections, and the different inhibitors available, illustrating the possible advantages and potential caveats of their use as anticancer and antiviral drugs.
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18
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Xuan P, Li ZF, Zhou L, Li JB. Mechanism of Viscum coloratum polysaccharide to regulate proliferation, migration, and invasion of gastric cancer cells. Shijie Huaren Xiaohua Zazhi 2019; 27:80-86. [DOI: 10.11569/wcjd.v27.i2.80] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Gastric cancer (GC) is the fifth most common cancer globally and the third leading cause of cancer death. Traditional Chinese medicine treatment can alleviate patients' pain and improve postoperative recurrence. Viscum coloratum polysaccharide is one of the main anti-tumor active components of Viscum coloratum and can inhibit proliferation and induce apoptosis of cancer cells.
AIM To investigate the effect of Viscum coloratum polysaccharide on the proliferation, migration, and invasion of human gastric cancer cells (SGC-7901) and the underlying mechanism.
METHODS Viability of SGC-7901 cells treated with Viscum coloratum polysaccharide at 20 μg/mL, 40 μg/mL, 60 μg/mL, 80 μg/mL, and 100 μg/mL for 48 h was detected by MTT assay. Cell migration and invasion were detected by Transwell assays, and the protein expression of cyclin-dependent kinases 4 (CDK4), matrix metalloproteinase 2 (MMP-2), matrix metalloproteinase 9 (MMP-9), and nuclear factor κB (NF-κB) p65 in SGC-7901 cells was detected by Western blot.
RESULTS Different concentrations of Viscum coloratum polysaccharide could inhibit the viability of SGC-7901 cells in a dose-dependent manner (P < 0.05). The results of Western blot indicted that the protein expression of CDK4, MMP-2, MMP-9, and NF-κB p65 in SGC-7901 cells treated with 100 μg/mL Viscum coloratum polysaccharide was down-regulated (P < 0.05), and Transwell assays showed that the numbers of migratory and invaded cells in the visual field were significantly decreased (P < 0.05).
CONCLUSION Viscum coloratum polysaccharide may inhibit the proliferation, migration, and invasion of SGC-7901 cells by regulating the NF-κB signaling pathway and the expression of CDK4, MMP-2, and MMP-9 proteins.
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Affiliation(s)
- Ping Xuan
- Department of Rehabilitation Medicine, Yiwu Central Hospital, Yiwu 322000, Zhejiang Province, China
| | - Zi-Fang Li
- Department of Rehabilitation Medicine, Yiwu Central Hospital, Yiwu 322000, Zhejiang Province, China
| | - Liang Zhou
- Department of Rehabilitation Medicine, Zhejiang People's Hospital, Hangzhou 310000, Zhejiang Province, China
| | - Jue-Bao Li
- Department of Rehabilitation Medicine, Zhejiang People's Hospital, Hangzhou 310000, Zhejiang Province, China
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19
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Perčulija V, Ouyang S. Diverse Roles of DEAD/DEAH-Box Helicases in Innate Immunity and Diseases. HELICASES FROM ALL DOMAINS OF LIFE 2019. [PMCID: PMC7158350 DOI: 10.1016/b978-0-12-814685-9.00009-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
DEAD/DEAH-box helicases are enzymes that belong to the DEAD/H-box family of SF2 helicase superfamily. These enzymes are essential in RNA metabolism, where they are involved in a number of processes that require manipulation of RNA structure. Recent studies have found that some DEAD/DEAH-box helicases play important roles in innate immunity, where they act as sensors of cytosolic DNA/RNA, as adaptor proteins, or as regulators of signaling and gene expression. In spite of their function in immunity, DEAD/DEAH-box helicases can also be hijacked and exploited by viruses to circumvent detection and aid in viral replication. These findings not only imply that DEAD/DEAH-box helicases have a broader function than previously thought, but also give us a much better understanding of immune mechanisms and diseases that arise due to the dysregulation or evasion thereof. In this chapter, we demonstrate the known scope of activities of human DEAD/DEAH-box helicases in innate immunity and interaction with viruses or other pathogens. Additionally, we give an outline of diseases in which they are, or may be, involved in the context of immunity.
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20
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Gillison ML, Akagi K, Xiao W, Jiang B, Pickard RKL, Li J, Swanson BJ, Agrawal AD, Zucker M, Stache-Crain B, Emde AK, Geiger HM, Robine N, Coombes KR, Symer DE. Human papillomavirus and the landscape of secondary genetic alterations in oral cancers. Genome Res 2018; 29:1-17. [PMID: 30563911 PMCID: PMC6314162 DOI: 10.1101/gr.241141.118] [Citation(s) in RCA: 144] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Accepted: 11/30/2018] [Indexed: 12/15/2022]
Abstract
Human papillomavirus (HPV) is a necessary but insufficient cause of a subset of oral squamous cell carcinomas (OSCCs) that is increasing markedly in frequency. To identify contributory, secondary genetic alterations in these cancers, we used comprehensive genomics methods to compare 149 HPV-positive and 335 HPV-negative OSCC tumor/normal pairs. Different behavioral risk factors underlying the two OSCC types were reflected in distinctive genomic mutational signatures. In HPV-positive OSCCs, the signatures of APOBEC cytosine deaminase editing, associated with anti-viral immunity, were strongly linked to overall mutational burden. In contrast, in HPV-negative OSCCs, T>C substitutions in the sequence context 5'-ATN-3' correlated with tobacco exposure. Universal expression of HPV E6*1 and E7 oncogenes was a sine qua non of HPV-positive OSCCs. Significant enrichment of somatic mutations was confirmed or newly identified in PIK3CA, KMT2D, FGFR3, FBXW7, DDX3X, PTEN, TRAF3, RB1, CYLD, RIPK4, ZNF750, EP300, CASZ1, TAF5, RBL1, IFNGR1, and NFKBIA Of these, many affect host pathways already targeted by HPV oncoproteins, including the p53 and pRB pathways, or disrupt host defenses against viral infections, including interferon (IFN) and nuclear factor kappa B signaling. Frequent copy number changes were associated with concordant changes in gene expression. Chr 11q (including CCND1) and 14q (including DICER1 and AKT1) were recurrently lost in HPV-positive OSCCs, in contrast to their gains in HPV-negative OSCCs. High-ranking variant allele fractions implicated ZNF750, PIK3CA, and EP300 mutations as candidate driver events in HPV-positive cancers. We conclude that virus-host interactions cooperatively shape the unique genetic features of these cancers, distinguishing them from their HPV-negative counterparts.
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Affiliation(s)
- Maura L Gillison
- Department of Thoracic/Head and Neck Medical Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas 77030, USA
| | - Keiko Akagi
- Department of Thoracic/Head and Neck Medical Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas 77030, USA
| | - Weihong Xiao
- Department of Thoracic/Head and Neck Medical Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas 77030, USA
| | - Bo Jiang
- Department of Thoracic/Head and Neck Medical Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas 77030, USA
| | - Robert K L Pickard
- Division of Medical Oncology, Department of Internal Medicine, Ohio State University, Columbus, Ohio 43210, USA
| | - Jingfeng Li
- Division of Medical Oncology, Department of Internal Medicine, Ohio State University, Columbus, Ohio 43210, USA
| | - Benjamin J Swanson
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, Nebraska 68198, USA
| | - Amit D Agrawal
- Department of Otolaryngology - Head and Neck Surgery, Ohio State University Comprehensive Cancer Center, Columbus, Ohio 43210, USA
| | - Mark Zucker
- Department of Biomedical Informatics, Ohio State University Comprehensive Cancer Center, Columbus, Ohio 43210, USA
| | | | | | | | | | - Kevin R Coombes
- Department of Biomedical Informatics, Ohio State University Comprehensive Cancer Center, Columbus, Ohio 43210, USA
| | - David E Symer
- Department of Lymphoma and Myeloma, University of Texas MD Anderson Cancer Center, Houston, Texas 77030, USA
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21
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Rosner A, Kravchenko O, Rinkevich B. IAP genes partake weighty roles in the astogeny and whole body regeneration in the colonial urochordate Botryllus schlosseri. Dev Biol 2018; 448:320-341. [PMID: 30385275 DOI: 10.1016/j.ydbio.2018.10.015] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Revised: 09/29/2018] [Accepted: 10/17/2018] [Indexed: 12/12/2022]
Abstract
Inhibitors of Apoptosis Protein (IAP) genes participate in processes like apoptosis, proliferation, innate immunity, inflammation, cell motility, differentiation and in malignancies. Here we reveal 25 IAP genes in the tunicate Botryllus schlosseri's genome and their functions in two developmental biology phenomena, a new mode of whole body regeneration (WBR) induced by budectomy, and blastogenesis, the four-staged cycles of botryllid ascidian astogeny. IAP genes that were specifically upregulated during these developmental phenomena were identified, and protein expression patterns of one of these genes, IAP28, were followed. Most of the IAP genes upregulation recorded at blastogenetic stages C/D was in concert with the upregulation at 100 μM H2O2 apoptotic-induced treatment and in parallel to expressions of AIF1, Bax, Mcl1, caspase 2 and two orthologues of caspase 7. Wnt agonist altered the takeover duration along with reduced IAP expressions, and displacement of IAP28+ phagocytes. WBR was initiated solely at blastogenetic stage D, where zooidal absorption was attenuated and regeneration centers were formed either from remains of partially absorbed zooids or from deformed ampullae. Subsequently, bud-bearing zooids developed, in concert with a massive IAP28-dependent phagocytic wave that eliminated the old zooids, then proceeded with the establishment of morphologically normal-looking colonies. IAP4, IAP14 and IAP28 were also involved in WBR, in conjunction with the expression of the pro-survival PI3K-Akt pathway. IAPs function deregulation by Smac mimetics resulted in severe morphological damages, attenuation in bud growth and differentiation, and in destabilization of colonial coordination. Longtime knockdown of IAP functions prior to the budectomy, resulted in colonial death.
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Affiliation(s)
- Amalia Rosner
- Israel Oceanographic&Limnological Research Institute, Tel Shikmona, P.O.B. 8030, Haifa 31080, Israel.
| | - Olha Kravchenko
- Israel Oceanographic&Limnological Research Institute, Tel Shikmona, P.O.B. 8030, Haifa 31080, Israel; National University of Life and Environmental Sciences of Ukraine, Heroiv Oborony, Str 17, building 2, of 45, Kyiv 03041, Ukraine
| | - Baruch Rinkevich
- Israel Oceanographic&Limnological Research Institute, Tel Shikmona, P.O.B. 8030, Haifa 31080, Israel
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22
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Bardin P, Marchal-Duval E, Sonneville F, Blouquit-Laye S, Rousselet N, Le Rouzic P, Corvol H, Tabary O. Small RNA and transcriptome sequencing reveal the role of miR-199a-3p in inflammatory processes in cystic fibrosis airways. J Pathol 2018; 245:410-420. [DOI: 10.1002/path.5095] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 04/11/2018] [Accepted: 04/26/2018] [Indexed: 01/11/2023]
Affiliation(s)
- Pauline Bardin
- Sorbonne Université, UPMC Univ Paris 06, INSERM, Centre de Recherche Saint Antoine (CRSA); Paris France
| | - Emmeline Marchal-Duval
- Sorbonne Université, UPMC Univ Paris 06, INSERM, Centre de Recherche Saint Antoine (CRSA); Paris France
| | - Florence Sonneville
- Sorbonne Université, UPMC Univ Paris 06, INSERM, Centre de Recherche Saint Antoine (CRSA); Paris France
| | - Sabine Blouquit-Laye
- Université de Versailles Saint Quentin en Yvelines; UFR des Sciences de la Santé, UMR 1173; Montigny-Le-Bretonneux France
| | - Nathalie Rousselet
- Sorbonne Université, UPMC Univ Paris 06, INSERM, Centre de Recherche Saint Antoine (CRSA); Paris France
| | - Philippe Le Rouzic
- Sorbonne Université, UPMC Univ Paris 06, INSERM, Centre de Recherche Saint Antoine (CRSA); Paris France
| | - Harriet Corvol
- Sorbonne Université, UPMC Univ Paris 06, INSERM, Centre de Recherche Saint Antoine (CRSA); Paris France
- Hôpital Trousseau; Paediatric Respiratory Department, AP-HP; Paris France
| | - Olivier Tabary
- Sorbonne Université, UPMC Univ Paris 06, INSERM, Centre de Recherche Saint Antoine (CRSA); Paris France
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23
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Wang X, Wang R, Luo M, Li C, Wang HX, Huan CC, Qu YR, Liao Y, Mao X. (DEAD)-box RNA helicase 3 modulates NF-κB signal pathway by controlling the phosphorylation of PP2A-C subunit. Oncotarget 2018; 8:33197-33213. [PMID: 28402257 PMCID: PMC5464861 DOI: 10.18632/oncotarget.16593] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Accepted: 03/17/2017] [Indexed: 01/29/2023] Open
Abstract
Asp-Glu-Ala-Asp (DEAD)-box RNA helicase 3 (DDX3), an ATP-dependent RNA helicase, is associated with RNA splicing, mRNA export, transcription, translation, and RNA decay. Recent studies revealed that DDX3 participates in innate immune response during virus infection by interacting with TBK1 and regulating the production of IFN-β. In our studies, we demonstrated that DDX3 regulated NF-κB signal pathway. We found that DDX3 knockdown reduced the phosphorylation of p65 and IKK-β and ultimately attenuated the production of inflammatory cytokines induced by poly(I:C) or TNF-α stimulation. The regulatory effect of DDX3 on NF-κB signal pathway was not affected by the loss of its ATPase or helicase activity. We further identified PP2A C subunit (PP2A-C) as an interaction partner of DDX3 by co-immunoprecipitation and mass spectrum analysis. We confirmed that DDX3 formed the complex with PP2A-C/IKK-β and regulated the interaction between IKK-β and PP2A-C. Furthermore, we demonstrated that DDX3 modulated the activity of PP2A by controlling the phosphorylation of PP2A-C, which might enable PP2A-C to regulate NF-κB signal pathway by dephosphorylating IKK-β. All these findings suggested DDX3 plays multiple roles in modulating innate immune system.
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Affiliation(s)
- Xin Wang
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province, 210095, China
| | - Rui Wang
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province, 210095, China
| | - Miao Luo
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province, 210095, China
| | - Chen Li
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province, 210095, China
| | - Hua-Xia Wang
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province, 210095, China
| | - Chang-Chao Huan
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province, 210095, China
| | - Yu-Rong Qu
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai, 200241, China
| | - Ying Liao
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai, 200241, China
| | - Xiang Mao
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province, 210095, China.,Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai, 200241, China
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A proteomic portrait of dinoflagellate chromatin reveals abundant RNA-binding proteins. Chromosoma 2017; 127:29-43. [PMID: 28852823 DOI: 10.1007/s00412-017-0643-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Revised: 08/09/2017] [Accepted: 08/11/2017] [Indexed: 12/20/2022]
Abstract
Dinoflagellate chromatin is unique among eukaryotes, as the chromosomes are permanently condensed in a liquid crystal state instead of being packed in nucleosomes. However, how it is organized is still an unsolved mystery, in part due to the lack of a comprehensive catalog of dinoflagellate nuclear proteins. Here, we report the results of CHromatin Enrichment for Proteomics (CHEP) followed by shotgun mass spectrometry sequencing of the chromatin-associated proteins from the dinoflagellate Lingulodinum polyedra. Our analysis identified proteins involved in DNA replication and repair, transcription, and mRNA splicing, and showed a low level of contamination by proteins from other organelles. A limited number of proteins containing DNA-binding domains were found, consistent with the lack of diversity of these proteins in dinoflagellate transcriptomes. However, the number of proteins containing RNA-binding domains was unexpectedly high supporting a potential role for this type of protein in mediating gene expression and chromatin organization. We also identified a number of proteins involved in chromosome condensation and cell cycle progression as well as a single histone protein (H4). Our results provide the first detailed look at the nuclear proteins associated with the unusual chromatin structure of dinoflagellate nuclei and provide important insights into the biochemical basis of its structure and function.
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