1
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He Q, Liu C, Liu Q, Wang L, Song L. CgADAR1 involved in regulating the synthesis of interferon-like protein in Crassostrea gigas. FISH & SHELLFISH IMMUNOLOGY 2024; 150:109620. [PMID: 38740229 DOI: 10.1016/j.fsi.2024.109620] [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: 03/15/2024] [Revised: 04/24/2024] [Accepted: 05/10/2024] [Indexed: 05/16/2024]
Abstract
Adenosine deaminases acting on RNA 1 (ADAR1) is a dsRNA adenosine (A)-to-inosine (I) editing enzyme that regulates the innate immune response against virus invasion. In the present study, a novel CgADAR1 was identified from the oyster Crassostrea gigas. The open reading frame (ORF) of CgADAR1 was of 3444 bp encoding a peptide of 1147 amino acid residues with two Zα domains, one dsRNA binding motif (DSRM) and one RNA adenosine deaminase domain (ADEAMc). The mRNA transcripts of CgADAR1 were detected in all the examined tissues, with higher expression levels in mantle and gill, which were 7.11-fold and 4.90-fold (p < 0.05) of that in labial palp, respectively. The mRNA transcripts of CgADAR1 in haemocytes were significantly induced at 24 h and 36 h after Poly (A: U) stimulation, which were 6.03-fold (p < 0.01) and 1.37-fold (p < 0.001) of that in control group, respectively. At 48 h after Poly (A:U) stimulation, the mRNA expression of CgRIG-Ⅰ, CgIRF8 and CgIFNLP significantly increased, which were 4.36-fold (p < 0.001), 1.82-fold (p < 0.05) and 1.92-fold (p < 0.05) of that in control group. After CgADAR1 expression was inhibited by RNA interference (RNAi), the mRNA expression levels of CgMDA5, CgRIG-Ⅰ, CgTBK1, CgIRF8 and CgIFNLP were significantly increased, which were 11.88-fold, 11.51-fold, 2.22-fold, 2.85-fold and 2.52-fold of that in control group (p < 0.001), and the phosphorylation level of CgTBK1 was also significantly increased. These results suggested that CgADAR1 played a regulation role in the early stages of viral infection by inhibiting the synthesis of interferon-like protein.
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Affiliation(s)
- Qianqian He
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian, 116023, China; Dalian Key Laboratory of Aquatic Animal Disease Prevention and Control, Dalian Ocean University, Dalian, 116023, China; Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian, 116023, China
| | - Chang Liu
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian, 116023, China; Dalian Key Laboratory of Aquatic Animal Disease Prevention and Control, Dalian Ocean University, Dalian, 116023, China; Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian, 116023, China.
| | - Qian Liu
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian, 116023, China; Dalian Key Laboratory of Aquatic Animal Disease Prevention and Control, Dalian Ocean University, Dalian, 116023, China; Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian, 116023, China
| | - Lingling Wang
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian, 116023, China; Dalian Key Laboratory of Aquatic Animal Disease Prevention and Control, Dalian Ocean University, Dalian, 116023, China; Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian, 116023, China; Southern Laboratory of Ocean Science and Engineering, Guangdong, Zhuhai, 519000, China
| | - Linsheng Song
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian, 116023, China; Dalian Key Laboratory of Aquatic Animal Disease Prevention and Control, Dalian Ocean University, Dalian, 116023, China; Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian, 116023, China; Southern Laboratory of Ocean Science and Engineering, Guangdong, Zhuhai, 519000, China.
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2
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Song Y, Cui J, Zhu J, Kim B, Kuo ML, Potts PR. RNATACs: Multispecific small molecules targeting RNA by induced proximity. Cell Chem Biol 2024; 31:1101-1117. [PMID: 38876100 DOI: 10.1016/j.chembiol.2024.05.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2024] [Revised: 05/09/2024] [Accepted: 05/22/2024] [Indexed: 06/16/2024]
Abstract
RNA-targeting small molecules (rSMs) have become an attractive modality to tackle traditionally undruggable proteins and expand the druggable space. Among many innovative concepts, RNA-targeting chimeras (RNATACs) represent a new class of multispecific, induced proximity small molecules that act by chemically bringing RNA targets into proximity with an endogenous RNA effector, such as a ribonuclease (RNase). Depending on the RNA effector, RNATACs can alter the stability, localization, translation, or splicing of the target RNA. Although still in its infancy, this new modality has the potential for broad applications in the future to treat diseases with high unmet need. In this review, we discuss potential advantages of RNATACs, recent progress in the field, and challenges to this cutting-edge technology.
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Affiliation(s)
- Yan Song
- Induced Proximity Platform, Amgen Research, Thousand Oaks, CA 91320, USA.
| | - Jia Cui
- Induced Proximity Platform, Amgen Research, Thousand Oaks, CA 91320, USA
| | - Jiaqiang Zhu
- Induced Proximity Platform, Amgen Research, Thousand Oaks, CA 91320, USA
| | - Boseon Kim
- Induced Proximity Platform, Amgen Research, Thousand Oaks, CA 91320, USA
| | - Mei-Ling Kuo
- Induced Proximity Platform, Amgen Research, Thousand Oaks, CA 91320, USA
| | - Patrick Ryan Potts
- Induced Proximity Platform, Amgen Research, Thousand Oaks, CA 91320, USA.
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3
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Xi J, Snieckute G, Martínez JF, Arendrup FSW, Asthana A, Gaughan C, Lund AH, Bekker-Jensen S, Silverman RH. Initiation of a ZAKα-dependent ribotoxic stress response by the innate immunity endoribonuclease RNase L. Cell Rep 2024; 43:113998. [PMID: 38551960 PMCID: PMC11090160 DOI: 10.1016/j.celrep.2024.113998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 02/13/2024] [Accepted: 03/08/2024] [Indexed: 04/09/2024] Open
Abstract
RNase L is an endoribonuclease of higher vertebrates that functions in antiviral innate immunity. Interferons induce oligoadenylate synthetase enzymes that sense double-stranded RNA of viral origin leading to the synthesis of 2',5'-oligoadenylate (2-5A) activators of RNase L. However, it is unknown precisely how RNase L remodels the host cell transcriptome. To isolate effects of RNase L from other effects of double-stranded RNA or virus, 2-5A is directly introduced into cells. Here, we report that RNase L activation by 2-5A causes a ribotoxic stress response involving the MAP kinase kinase kinase (MAP3K) ZAKα, MAP2Ks, and the stress-activated protein kinases JNK and p38α. RNase L activation profoundly alters the transcriptome by widespread depletion of mRNAs associated with different cellular functions but also by JNK/p38α-stimulated induction of inflammatory genes. These results show that the 2-5A/RNase L system triggers a protein kinase cascade leading to proinflammatory signaling and apoptosis.
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Affiliation(s)
- Jiajia Xi
- Department Cancer Biology, Cleveland Clinic Foundation, Lerner Research Institute, Cleveland, OH 44195, USA.
| | - Goda Snieckute
- Center for Healthy Aging, Department of Cellular and Molecular Medicine, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark; Center for Gene Expression, Department of Cellular and Molecular Medicine, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark
| | - José Francisco Martínez
- Center for Healthy Aging, Department of Cellular and Molecular Medicine, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark; Center for Gene Expression, Department of Cellular and Molecular Medicine, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark
| | | | - Abhishek Asthana
- Department Cancer Biology, Cleveland Clinic Foundation, Lerner Research Institute, Cleveland, OH 44195, USA
| | - Christina Gaughan
- Department Cancer Biology, Cleveland Clinic Foundation, Lerner Research Institute, Cleveland, OH 44195, USA
| | - Anders H Lund
- Biotech Research and Innovation Center, University of Copenhagen, Ole Maaløes Vej 5, 2200 Copenhagen, Denmark
| | - Simon Bekker-Jensen
- Center for Healthy Aging, Department of Cellular and Molecular Medicine, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark; Center for Gene Expression, Department of Cellular and Molecular Medicine, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark.
| | - Robert H Silverman
- Department Cancer Biology, Cleveland Clinic Foundation, Lerner Research Institute, Cleveland, OH 44195, USA.
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4
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Xi J, Snieckute G, Asthana A, Gaughan C, Bekker-Jensen S, Silverman RH. Initiation of a ZAKα-dependent Ribotoxic Stress Response by the Innate Immunity Endoribonuclease RNase L. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.10.12.562082. [PMID: 37873202 PMCID: PMC10592832 DOI: 10.1101/2023.10.12.562082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2023]
Abstract
RNase L is a regulated endoribonuclease in higher vertebrates that functions in antiviral innate immunity. Interferons induce OAS enzymes that sense double-stranded RNA of viral origin leading to synthesis of 2',5'-oligoadenylate (2-5A) activators of RNase L. However, it is unknown precisely how RNase L inhibits viral infections. To isolate effects of RNase L from other effects of double-stranded RNA or virus, 2-5A was directly introduced into cells. Here we report that RNase L activation by 2-5A causes a ribotoxic stress response that requires the ribosome-associated MAP3K, ZAKα. Subsequently, the stress-activated protein kinases (SAPK) JNK and p38α are phosphorylated. RNase L activation profoundly altered the transcriptome by widespread depletion of mRNAs associated with different cellular functions, but also by SAPK-dependent induction of inflammatory genes. Our findings show that 2-5A is a ribotoxic stressor that causes RNA damage through RNase L triggering a ZAKα kinase cascade leading to proinflammatory signaling and apoptosis.
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Affiliation(s)
- Jiajia Xi
- Department Cancer Biology, Cleveland Clinic Foundation, Lerner Research Institute, Cleveland, OH, 44195, USA
| | - Goda Snieckute
- Center for Healthy Aging, Department of Cellular and Molecular Medicine, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark
- Center for Gene Expression, Department of Cellular and Molecular Medicine, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark
| | - Abhishek Asthana
- Department Cancer Biology, Cleveland Clinic Foundation, Lerner Research Institute, Cleveland, OH, 44195, USA
| | - Christina Gaughan
- Department Cancer Biology, Cleveland Clinic Foundation, Lerner Research Institute, Cleveland, OH, 44195, USA
| | - Simon Bekker-Jensen
- Center for Healthy Aging, Department of Cellular and Molecular Medicine, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark
- Center for Gene Expression, Department of Cellular and Molecular Medicine, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark
| | - Robert H Silverman
- Department Cancer Biology, Cleveland Clinic Foundation, Lerner Research Institute, Cleveland, OH, 44195, USA
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Luqman-Fatah A, Miyoshi T. Human LINE-1 retrotransposons: impacts on the genome and regulation by host factors. Genes Genet Syst 2023; 98:121-154. [PMID: 36436935 DOI: 10.1266/ggs.22-00038] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Genome sequencing revealed that nearly half of the human genome is comprised of transposable elements. Although most of these elements have been rendered inactive due to mutations, full-length intact long interspersed element-1 (LINE-1 or L1) copies retain the ability to mobilize through RNA intermediates by a so-called "copy-and-paste" mechanism, termed retrotransposition. L1 is the only known autonomous mobile genetic element in the genome, and its retrotransposition contributes to inter- or intra-individual genetic variation within the human population. However, L1 retrotransposition also poses a threat to genome integrity due to gene disruption and chromosomal instability. Moreover, recent studies suggest that aberrant L1 expression can impact human health by causing diseases such as cancer and chronic inflammation that might lead to autoimmune disorders. To counteract these adverse effects, the host cells have evolved multiple layers of defense mechanisms at the epigenetic, RNA and protein levels. Intriguingly, several host factors have also been reported to facilitate L1 retrotransposition, suggesting that there is competition between negative and positive regulation of L1 by host factors. Here, we summarize the known host proteins that regulate L1 activity at different stages of the replication cycle and discuss how these factors modulate disease-associated phenotypes caused by L1.
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Affiliation(s)
- Ahmad Luqman-Fatah
- Department of Gene Mechanisms, Graduate School of Biostudies, Kyoto University
- Department of Stress Response, Radiation Biology Center, Graduate School of Biostudies, Kyoto University
| | - Tomoichiro Miyoshi
- Department of Gene Mechanisms, Graduate School of Biostudies, Kyoto University
- Department of Stress Response, Radiation Biology Center, Graduate School of Biostudies, Kyoto University
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6
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Springer NA, Meyer SM, Taghavi A, Benhamou RI, Tong Y, Childs-Disney JL, Disney MD. Methods for the study of ribonuclease targeting chimeras (RiboTACs). Methods Enzymol 2023; 692:249-298. [PMID: 37925183 PMCID: PMC10763923 DOI: 10.1016/bs.mie.2023.06.006] [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] [Indexed: 11/06/2023]
Abstract
Recently, a class of heterobifunctional small molecules called ribonuclease targeting chimeras (RiboTACs) have been developed that selectively induce degradation of RNAs in cells. These molecules function by recruiting latent ribonuclease (RNase L), an endoribonuclease involved in the innate immune response, to targeted RNA structures. The RiboTACs must activate RNase L in proximity to the RNA, resulting in cleavage of the RNA and downstream degradation. To develop and validate a new RiboTAC, several steps must be taken. First, small molecule activators that bind to RNase L must be identified. Next, since RNase L is only catalytically active upon ligand-induced homodimerization, the capability of identified small molecules to activate RNase L must be assessed. RNase L-activating small molecules should then be coupled to validated RNA-binding small molecules to construct the active RiboTAC. This RiboTAC can finally be assessed in cells for RNase L-dependent degradation of target RNAs. This chapter will provide several methods that are helpful to develop and assess RiboTACs throughout this process, including recombinant RNase L expression, methods to assess RNase L engagement in vitro such as saturation transfer difference nuclear magnetic resonance (STD NMR), an in vitro assay to assess activation of RNase L, and cellular methods to demonstrate RNase L-dependent cleavage.
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Affiliation(s)
- Noah A Springer
- The Scripps Research Institute & The Herbert Wertheim UF Scripps Institute for Biomedical Innovation & Technology, Department of Chemistry, Scripps Way, Jupiter, FL, United States
| | - Samantha M Meyer
- The Scripps Research Institute & The Herbert Wertheim UF Scripps Institute for Biomedical Innovation & Technology, Department of Chemistry, Scripps Way, Jupiter, FL, United States
| | - Amirhossein Taghavi
- The Scripps Research Institute & The Herbert Wertheim UF Scripps Institute for Biomedical Innovation & Technology, Department of Chemistry, Scripps Way, Jupiter, FL, United States
| | - Raphael I Benhamou
- Institute for Drug Research, The School of Pharmacy, The Hebrew University of Jerusalem, Hadassah-Ein Kerem, Jerusalem, Israel
| | - Yuquan Tong
- The Scripps Research Institute & The Herbert Wertheim UF Scripps Institute for Biomedical Innovation & Technology, Department of Chemistry, Scripps Way, Jupiter, FL, United States
| | - Jessica L Childs-Disney
- The Scripps Research Institute & The Herbert Wertheim UF Scripps Institute for Biomedical Innovation & Technology, Department of Chemistry, Scripps Way, Jupiter, FL, United States
| | - Matthew D Disney
- The Scripps Research Institute & The Herbert Wertheim UF Scripps Institute for Biomedical Innovation & Technology, Department of Chemistry, Scripps Way, Jupiter, FL, United States.
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7
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Govande AA, Babnis AW, Urban C, Habjan M, Hartmann R, Kranzusch PJ, Pichlmair A. RNase L-activating 2'-5' oligoadenylates bind ABCF1, ABCF3 and Decr-1. J Gen Virol 2023; 104. [PMID: 37676257 DOI: 10.1099/jgv.0.001890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/08/2023] Open
Abstract
A notable signalling mechanism employed by mammalian innate immune signalling pathways uses nucleotide-based second messengers such as 2'3'-cGAMP and 2'-5'-oligoadenylates (OAs), which bind and activate STING and RNase L, respectively. Interestingly, the involvement of nucleotide second messengers to activate antiviral responses is evolutionarily conserved, as evidenced by the identification of an antiviral cGAMP-dependent pathway in Drosophila. Using a mass spectrometry approach, we identified several members of the ABCF family in human, mouse and Drosophila cell lysates as 2'-5' OA-binding proteins, suggesting an evolutionarily conserved function. Biochemical characterization of these interactions demonstrates high-affinity binding of 2'-5' OA to ABCF1, dependent on phosphorylated 2'-5' OA and an intact Walker A/B motif of the ABC cassette of ABCF1. As further support for species-specific interactions with 2'-5' OA, we additionally identified that the metabolic enzyme Decr1 from mouse, but not human or Drosophila cells, forms a high-affinity complex with 2'-5' OA. A 1.4 Å co-crystal structure of the mouse Decr1-2'-5' OA complex explains high-affinity recognition of 2'-5' OA and the mechanism of species specificity. Despite clear evidence of physical interactions, we could not identify profound antiviral functions of ABCF1, ABCF3 or Decr1 or 2'-5' OA-dependent regulation of cellular translation rates, as suggested by the engagement of ABCF proteins. Thus, although the biological consequences of the here identified interactions need to be further studied, our data suggest that 2'-5' OA can serve as a signalling hub to distribute a signal to different recipient proteins.
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Affiliation(s)
- Apurva A Govande
- Department of Microbiology, Harvard Medical School, Boston, MA 02115, USA
- Department of Cancer Immunology and Virology, Dana-Farber Cancer Institute, Boston, MA 02115, USA
| | | | - Christian Urban
- Institute of Virology, Technical University of Munich, Munich, Germany
| | - Matthias Habjan
- Institute of Virology, Technical University of Munich, Munich, Germany
| | - Rune Hartmann
- Department of Molecular Biology and Genetics, Aarhus University, Aarhus, Denmark
| | - Philip J Kranzusch
- Department of Microbiology, Harvard Medical School, Boston, MA 02115, USA
- Department of Cancer Immunology and Virology, Dana-Farber Cancer Institute, Boston, MA 02115, USA
- Parker Institute for Cancer Immunotherapy at Dana-Farber Cancer Institute, Boston, MA 02115, USA
| | - Andreas Pichlmair
- Institute of Virology, Technical University of Munich, Munich, Germany
- German Center for Infection Research (DZIF), Munich partner site, Munich, Germany
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8
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Lee D, Le Pen J, Yatim A, Dong B, Aquino Y, Ogishi M, Pescarmona R, Talouarn E, Rinchai D, Zhang P, Perret M, Liu Z, Jordan I, Elmas Bozdemir S, Bayhan GI, Beaufils C, Bizien L, Bisiaux A, Lei W, Hasan M, Chen J, Gaughan C, Asthana A, Libri V, Luna JM, Jaffré F, Hoffmann HH, Michailidis E, Moreews M, Seeleuthner Y, Bilguvar K, Mane S, Flores C, Zhang Y, Arias AA, Bailey R, Schlüter A, Milisavljevic B, Bigio B, Le Voyer T, Materna M, Gervais A, Moncada-Velez M, Pala F, Lazarov T, Levy R, Neehus AL, Rosain J, Peel J, Chan YH, Morin MP, Pino-Ramirez RM, Belkaya S, Lorenzo L, Anton J, Delafontaine S, Toubiana J, Bajolle F, Fumadó V, DeDiego ML, Fidouh N, Rozenberg F, Pérez-Tur J, Chen S, Evans T, Geissmann F, Lebon P, Weiss SR, Bonnet D, Duval X, Pan-Hammarström Q, Planas AM, Meyts I, Haerynck F, Pujol A, Sancho-Shimizu V, Dalgard CL, Bustamante J, Puel A, Boisson-Dupuis S, Boisson B, Maniatis T, Zhang Q, Bastard P, Notarangelo L, Béziat V, Perez de Diego R, Rodriguez-Gallego C, Su HC, Lifton RP, Jouanguy E, Cobat A, Alsina L, Keles S, Haddad E, Abel L, Belot A, Quintana-Murci L, Rice CM, Silverman RH, Zhang SY, Casanova JL. Inborn errors of OAS-RNase L in SARS-CoV-2-related multisystem inflammatory syndrome in children. Science 2023; 379:eabo3627. [PMID: 36538032 PMCID: PMC10451000 DOI: 10.1126/science.abo3627] [Citation(s) in RCA: 61] [Impact Index Per Article: 61.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Revised: 08/16/2022] [Accepted: 12/14/2022] [Indexed: 12/24/2022]
Abstract
Multisystem inflammatory syndrome in children (MIS-C) is a rare and severe condition that follows benign COVID-19. We report autosomal recessive deficiencies of OAS1, OAS2, or RNASEL in five unrelated children with MIS-C. The cytosolic double-stranded RNA (dsRNA)-sensing OAS1 and OAS2 generate 2'-5'-linked oligoadenylates (2-5A) that activate the single-stranded RNA-degrading ribonuclease L (RNase L). Monocytic cell lines and primary myeloid cells with OAS1, OAS2, or RNase L deficiencies produce excessive amounts of inflammatory cytokines upon dsRNA or severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) stimulation. Exogenous 2-5A suppresses cytokine production in OAS1-deficient but not RNase L-deficient cells. Cytokine production in RNase L-deficient cells is impaired by MDA5 or RIG-I deficiency and abolished by mitochondrial antiviral-signaling protein (MAVS) deficiency. Recessive OAS-RNase L deficiencies in these patients unleash the production of SARS-CoV-2-triggered, MAVS-mediated inflammatory cytokines by mononuclear phagocytes, thereby underlying MIS-C.
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Affiliation(s)
- Danyel Lee
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY, USA
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Paris, France
- Paris City University, Imagine Institute, Paris, France
| | - Jérémie Le Pen
- Laboratory of Virology and Infectious Disease, The Rockefeller University, New York, NY, USA
| | - Ahmad Yatim
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY, USA
| | - Beihua Dong
- Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Yann Aquino
- Human Evolutionary Genetics Unit, Institut Pasteur, Paris City University, CNRS UMR 2000, Paris, France
- Doctoral College, Sorbonne University, Paris, France
| | - Masato Ogishi
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY, USA
| | | | - Estelle Talouarn
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Paris, France
- Paris City University, Imagine Institute, Paris, France
| | - Darawan Rinchai
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY, USA
| | - Peng Zhang
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY, USA
| | - Magali Perret
- Laboratory of Immunology, Lyon Sud Hospital, Lyon, France
| | - Zhiyong Liu
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY, USA
| | - Iolanda Jordan
- Pediatric Intensive Care Department, Hospital Sant Joan de Déu, Barcelona, Spain
- Kids Corona Platform, Barcelona, Spain
- Center for Biomedical Network Research on Epidemiology and Public Health (CIBERESP), Instituto de Salud Carlos III, Madrid, Spain
- Department of Surgery and Surgical Specializations, Faculty of Medicine and Health Sciences, University of Barcelona, Barcelona, Spain
- Respiratory and Immunological Dysfunction in Pediatric Critically Ill Patients, Institute of Recerca Sant Joan de Déu, Barcelona, Spain
| | | | | | - Camille Beaufils
- Immunology and Rheumatology Division, Department of Pediatrics, University of Montreal, CHU Sainte-Justine, Montreal, QC, Canada
| | - Lucy Bizien
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Paris, France
- Paris City University, Imagine Institute, Paris, France
| | - Aurelie Bisiaux
- Human Evolutionary Genetics Unit, Institut Pasteur, Paris City University, CNRS UMR 2000, Paris, France
| | - Weite Lei
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY, USA
| | - Milena Hasan
- Center for Translational Research, Institut Pasteur, Paris City University, Paris, France
| | - Jie Chen
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY, USA
| | - Christina Gaughan
- Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Abhishek Asthana
- Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Valentina Libri
- Center for Translational Research, Institut Pasteur, Paris City University, Paris, France
| | - Joseph M. Luna
- Laboratory of Virology and Infectious Disease, The Rockefeller University, New York, NY, USA
- Department of Biochemistry and Center for RNA Science and Therapeutics, Case Western Reserve University, Cleveland, OH, USA
| | - Fabrice Jaffré
- Department of Surgery, Weill Cornell Medical College, New York, NY, USA
| | - H.-Heinrich Hoffmann
- Laboratory of Virology and Infectious Disease, The Rockefeller University, New York, NY, USA
| | - Eleftherios Michailidis
- Laboratory of Virology and Infectious Disease, The Rockefeller University, New York, NY, USA
- Department of Pediatrics, School of Medicine, Emory University, Atlanta, GA, USA
| | - Marion Moreews
- International Center of Infectiology Research (CIRI), University of Lyon, INSERM U1111, Claude Bernard University, Lyon 1, CNRS, UMR5308, ENS of Lyon, Lyon, France
| | - Yoann Seeleuthner
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Paris, France
- Paris City University, Imagine Institute, Paris, France
| | - Kaya Bilguvar
- Departments of Neurosurgery and Genetics and Yale Center for Genome Analysis, Yale School of Medicine, New Haven, CT, USA
- Department of Medical Genetics, School of Medicine, Acibadem Mehmet Ali Aydinlar University, Istanbul, Turkey
| | - Shrikant Mane
- Department of Genetics, Yale University School of Medicine, New Haven, CT, USA
| | - Carlos Flores
- Research Unit, Nuestra Señora de la Candelaria University Hospital, Santa Cruz de Tenerife, Spain
- Genomics Division, Institute of Technology and Renewable Energies (ITER), Granadilla de Abona, Spain
- CIBERES, ISCIII, Madrid, Spain
| | - Yu Zhang
- Laboratory of Clinical Immunology and Microbiology, Division of Intramural Research, NIAID, NIH, Bethesda, MD, USA
- NIAID Clinical Genomics Program, NIH, Laboratory of Clinical Immunology and Microbiology, Division of Intramural Research, NIAID, NIH, Bethesda, MD, USA
| | - Andrés A. Arias
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY, USA
- Primary Immunodeficiencies Group, University of Antioquia (UdeA), Medellin, Colombia
- School of Microbiology, University of Antioquia (UdeA), Medellin, Colombia
| | - Rasheed Bailey
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY, USA
| | - Agatha Schlüter
- Neurometabolic Diseases Laboratory, IDIBELL–Hospital Duran I Reynals, CIBERER U759, ISIiii, Madrid, Spain
| | - Baptiste Milisavljevic
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY, USA
| | - Benedetta Bigio
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY, USA
| | - Tom Le Voyer
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Paris, France
- Paris City University, Imagine Institute, Paris, France
| | - Marie Materna
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Paris, France
- Paris City University, Imagine Institute, Paris, France
| | - Adrian Gervais
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Paris, France
- Paris City University, Imagine Institute, Paris, France
| | - Marcela Moncada-Velez
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY, USA
| | - Francesca Pala
- Laboratory of Clinical Immunology and Microbiology, Division of Intramural Research, NIAID, NIH, Bethesda, MD, USA
| | - Tomi Lazarov
- Immunology Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Romain Levy
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Paris, France
- Paris City University, Imagine Institute, Paris, France
| | - Anna-Lena Neehus
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Paris, France
- Paris City University, Imagine Institute, Paris, France
| | - Jérémie Rosain
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Paris, France
- Paris City University, Imagine Institute, Paris, France
| | - Jessica Peel
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY, USA
| | - Yi-Hao Chan
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY, USA
| | - Marie-Paule Morin
- Immunology and Rheumatology Division, Department of Pediatrics, University of Montreal, CHU Sainte-Justine, Montreal, QC, Canada
| | | | - Serkan Belkaya
- Department of Molecular Biology and Genetics, Bilkent University, Ankara, Turkey
| | - Lazaro Lorenzo
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY, USA
| | - Jordi Anton
- Department of Surgery and Surgical Specializations, Faculty of Medicine and Health Sciences, University of Barcelona, Barcelona, Spain
- Pediatric Rheumatology Division, Hospital Sant Joan de Déu, Barcelona, Spain
- Study Group for Immune Dysfunction Diseases in Children (GEMDIP), Institute of Recerca Sant Joan de Déu, Barcelona, Spain
| | | | - Julie Toubiana
- Department of General Pediatrics and Pediatric Infectious Diseases, Necker Hospital for Sick Children, Assistance Publique–Hôpitaux de Paris (AP-HP), Paris City University, Paris, France
- Biodiversity and Epidemiology of Bacterial Pathogens, Pasteur Institute, Paris, France
| | - Fanny Bajolle
- Department of Pediatric Cardiology, Necker Hospital for Sick Children, AP-HP, Paris City University, Paris, France
| | - Victoria Fumadó
- Kids Corona Platform, Barcelona, Spain
- Department of Surgery and Surgical Specializations, Faculty of Medicine and Health Sciences, University of Barcelona, Barcelona, Spain
- Pediatrics Infectious Diseases Division, Hospital Sant Joan de Déu, Barcelona, Spain
- Infectious Diseases and Microbiome, Institute of Recerca Sant Joan de Déu, Barcelona, Spain
| | - Marta L. DeDiego
- Department of Molecular and Cellular Biology, National Center for Biotechnology (CNB-CSIC), Madrid, Spain
| | - Nadhira Fidouh
- Laboratory of Virology, Bichat–Claude Bernard Hospital, Paris, France
| | - Flore Rozenberg
- Laboratory of Virology, AP-HP, Cochin Hospital, Paris, France
| | - Jordi Pérez-Tur
- Molecular Genetics Unit, Institute of Biomedicine of Valencia (IBV-CSIC), Valencia, Spain
- CIBERNED, ISCIII, Madrid, Spain
- Joint Research Unit in Neurology and Molecular Genetics, Institut of Investigation Sanitaria La Fe, Valencia, Spain
| | - Shuibing Chen
- Department of Surgery, Weill Cornell Medical College, New York, NY, USA
| | - Todd Evans
- Department of Surgery, Weill Cornell Medical College, New York, NY, USA
| | - Frédéric Geissmann
- Immunology Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Pierre Lebon
- Medical School, Paris City University, Paris, France
| | - Susan R. Weiss
- Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Damien Bonnet
- Department of Pediatric Cardiology, Necker Hospital for Sick Children, AP-HP, Paris City University, Paris, France
| | - Xavier Duval
- Bichat–Claude Bernard Hospital, Paris, France
- University Paris Diderot, Paris 7, UFR of Médecine-Bichat, Paris, France
- IAME, INSERM, UMRS1137, Paris City University, Paris, France
- Infectious and Tropical Diseases Department, AP-HP, Bichat–Claude Bernard Hospital, Paris, France
| | - CoV-Contact Cohort§
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY, USA
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Paris, France
- Paris City University, Imagine Institute, Paris, France
- Laboratory of Virology and Infectious Disease, The Rockefeller University, New York, NY, USA
- Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
- Human Evolutionary Genetics Unit, Institut Pasteur, Paris City University, CNRS UMR 2000, Paris, France
- Doctoral College, Sorbonne University, Paris, France
- Laboratory of Immunology, Lyon Sud Hospital, Lyon, France
- Pediatric Intensive Care Department, Hospital Sant Joan de Déu, Barcelona, Spain
- Kids Corona Platform, Barcelona, Spain
- Center for Biomedical Network Research on Epidemiology and Public Health (CIBERESP), Instituto de Salud Carlos III, Madrid, Spain
- Department of Surgery and Surgical Specializations, Faculty of Medicine and Health Sciences, University of Barcelona, Barcelona, Spain
- Respiratory and Immunological Dysfunction in Pediatric Critically Ill Patients, Institute of Recerca Sant Joan de Déu, Barcelona, Spain
- Bursa City Hospital, Bursa, Turkey
- Ankara City Hospital, Yildirim Beyazit University, Ankara, Turkey
- Immunology and Rheumatology Division, Department of Pediatrics, University of Montreal, CHU Sainte-Justine, Montreal, QC, Canada
- Center for Translational Research, Institut Pasteur, Paris City University, Paris, France
- Department of Biochemistry and Center for RNA Science and Therapeutics, Case Western Reserve University, Cleveland, OH, USA
- Department of Surgery, Weill Cornell Medical College, New York, NY, USA
- Department of Pediatrics, School of Medicine, Emory University, Atlanta, GA, USA
- International Center of Infectiology Research (CIRI), University of Lyon, INSERM U1111, Claude Bernard University, Lyon 1, CNRS, UMR5308, ENS of Lyon, Lyon, France
- Departments of Neurosurgery and Genetics and Yale Center for Genome Analysis, Yale School of Medicine, New Haven, CT, USA
- Department of Medical Genetics, School of Medicine, Acibadem Mehmet Ali Aydinlar University, Istanbul, Turkey
- Department of Genetics, Yale University School of Medicine, New Haven, CT, USA
- Research Unit, Nuestra Señora de la Candelaria University Hospital, Santa Cruz de Tenerife, Spain
- Genomics Division, Institute of Technology and Renewable Energies (ITER), Granadilla de Abona, Spain
- CIBERES, ISCIII, Madrid, Spain
- Department of Clinical Sciences, University Fernando Pessoa Canarias, Las Palmas de Gran Canaria, Spain
- Laboratory of Clinical Immunology and Microbiology, Division of Intramural Research, NIAID, NIH, Bethesda, MD, USA
- NIAID Clinical Genomics Program, NIH, Laboratory of Clinical Immunology and Microbiology, Division of Intramural Research, NIAID, NIH, Bethesda, MD, USA
- Primary Immunodeficiencies Group, University of Antioquia (UdeA), Medellin, Colombia
- School of Microbiology, University of Antioquia (UdeA), Medellin, Colombia
- Neurometabolic Diseases Laboratory, IDIBELL–Hospital Duran I Reynals, CIBERER U759, ISIiii, Madrid, Spain
- Immunology Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA
- Pediatrics Department, Hospital Sant Joan de Déu, Barcelona, Spain
- Department of Molecular Biology and Genetics, Bilkent University, Ankara, Turkey
- Pediatric Rheumatology Division, Hospital Sant Joan de Déu, Barcelona, Spain
- Study Group for Immune Dysfunction Diseases in Children (GEMDIP), Institute of Recerca Sant Joan de Déu, Barcelona, Spain
- Department of Pediatrics, University Hospitals Leuven, Leuven, Belgium
- Department of General Pediatrics and Pediatric Infectious Diseases, Necker Hospital for Sick Children, Assistance Publique–Hôpitaux de Paris (AP-HP), Paris City University, Paris, France
- Biodiversity and Epidemiology of Bacterial Pathogens, Pasteur Institute, Paris, France
- Department of Pediatric Cardiology, Necker Hospital for Sick Children, AP-HP, Paris City University, Paris, France
- Pediatrics Infectious Diseases Division, Hospital Sant Joan de Déu, Barcelona, Spain
- Infectious Diseases and Microbiome, Institute of Recerca Sant Joan de Déu, Barcelona, Spain
- Department of Molecular and Cellular Biology, National Center for Biotechnology (CNB-CSIC), Madrid, Spain
- Laboratory of Virology, Bichat–Claude Bernard Hospital, Paris, France
- Laboratory of Virology, AP-HP, Cochin Hospital, Paris, France
- Molecular Genetics Unit, Institute of Biomedicine of Valencia (IBV-CSIC), Valencia, Spain
- CIBERNED, ISCIII, Madrid, Spain
- Joint Research Unit in Neurology and Molecular Genetics, Institut of Investigation Sanitaria La Fe, Valencia, Spain
- Medical School, Paris City University, Paris, France
- Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
- Bichat–Claude Bernard Hospital, Paris, France
- University Paris Diderot, Paris 7, UFR of Médecine-Bichat, Paris, France
- IAME, INSERM, UMRS1137, Paris City University, Paris, France
- Infectious and Tropical Diseases Department, AP-HP, Bichat–Claude Bernard Hospital, Paris, France
- Department of Biosciences and Nutrition, Karolinska Institutet, Huddinge, Sweden
- Department of Neuroscience and Experimental Therapeutics, Institute for Biomedical Research of Barcelona (IIBB), Spanish National Research Council (CSIC), Barcelona, Spain
- Institute for Biomedical Investigations August Pi i Sunyer (IDIBAPS), Barcelona, Spain
- Department of Pediatrics, University Hospitals Leuven and Laboratory for Inborn Errors of Immunity, KU Leuven, Leuven, Belgium
- Primary Immunodeficiency Research Laboratory, Center for Primary Immunodeficiency Ghent, Ghent University Hospital, Ghent, Belgium
- Neurometabolic Diseases Laboratory, IDIBELL–Hospital Duran I Reynals; and Catalan Institution for Research and Advanced Studies (ICREA), Barcelona, Spain
- CIBERER U759, ISCiii, Madrid, Spain
- Department of Paediatric Infectious Diseases and Virology, Imperial College London, London, UK
- Centre for Paediatrics and Child Health, Faculty of Medicine, Imperial College London, London, UK
- The American Genome Center, Collaborative Health Initiative Research Program, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
- Department of Anatomy, Physiology, and Genetics, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
- Study Center for Primary Immunodeficiencies, Necker Hospital for Sick Children, AP-HP, Paris, France
- New York Genome Center, New York, NY, USA
- Pediatric Hematology-Immunology and Rheumatology Unit, Necker Hospital for Sick Children, AP-HP, Paris, France
- Laboratory of Immunogenetics of Human Diseases, Innate Immunity Group, IdiPAZ Institute for Health Research, La Paz Hospital, Madrid, Spain
- Interdepartmental Group of Immunodeficiencies, Madrid, Spain
- Department of Immunology, University Hospital of Gran Canaria Dr. Negrín, Canarian Health System, Las Palmas de Gran Canaria, Spain
- Laboratory of Human Genetics and Genomics, The Rockefeller University, New York, NY, USA
- Clinical Immunology and Primary Immunodeficiencies Unit, Pediatric Allergy and Clinical Immunology Department, Hospital Sant Joan de Déu, Barcelona, Spain
- Necmettin Erbakan University, Konya, Turkey
- Department of Pediatrics, Department of Microbiology, Immunology and Infectious Diseases, University of Montreal and Immunology and Rheumatology Division, CHU Sainte-Justine, Montreal, QC, Canada
- National Reference Center for Rheumatic, Autoimmune and Systemic Diseases in Children (RAISE), Pediatric Nephrology, Rheumatology, Dermatology Unit, Hospital of Mother and Child, Hospices Civils of Lyon, Lyon, France
- Human Genomics and Evolution, Collège de France, Paris, France
- Department of Pediatrics, Necker Hospital for Sick Children, Paris, France
- Howard Hughes Medical Institute, The Rockefeller University, New York, NY, USA
| | - COVID Human Genetic Effort¶
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY, USA
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Paris, France
- Paris City University, Imagine Institute, Paris, France
- Laboratory of Virology and Infectious Disease, The Rockefeller University, New York, NY, USA
- Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
- Human Evolutionary Genetics Unit, Institut Pasteur, Paris City University, CNRS UMR 2000, Paris, France
- Doctoral College, Sorbonne University, Paris, France
- Laboratory of Immunology, Lyon Sud Hospital, Lyon, France
- Pediatric Intensive Care Department, Hospital Sant Joan de Déu, Barcelona, Spain
- Kids Corona Platform, Barcelona, Spain
- Center for Biomedical Network Research on Epidemiology and Public Health (CIBERESP), Instituto de Salud Carlos III, Madrid, Spain
- Department of Surgery and Surgical Specializations, Faculty of Medicine and Health Sciences, University of Barcelona, Barcelona, Spain
- Respiratory and Immunological Dysfunction in Pediatric Critically Ill Patients, Institute of Recerca Sant Joan de Déu, Barcelona, Spain
- Bursa City Hospital, Bursa, Turkey
- Ankara City Hospital, Yildirim Beyazit University, Ankara, Turkey
- Immunology and Rheumatology Division, Department of Pediatrics, University of Montreal, CHU Sainte-Justine, Montreal, QC, Canada
- Center for Translational Research, Institut Pasteur, Paris City University, Paris, France
- Department of Biochemistry and Center for RNA Science and Therapeutics, Case Western Reserve University, Cleveland, OH, USA
- Department of Surgery, Weill Cornell Medical College, New York, NY, USA
- Department of Pediatrics, School of Medicine, Emory University, Atlanta, GA, USA
- International Center of Infectiology Research (CIRI), University of Lyon, INSERM U1111, Claude Bernard University, Lyon 1, CNRS, UMR5308, ENS of Lyon, Lyon, France
- Departments of Neurosurgery and Genetics and Yale Center for Genome Analysis, Yale School of Medicine, New Haven, CT, USA
- Department of Medical Genetics, School of Medicine, Acibadem Mehmet Ali Aydinlar University, Istanbul, Turkey
- Department of Genetics, Yale University School of Medicine, New Haven, CT, USA
- Research Unit, Nuestra Señora de la Candelaria University Hospital, Santa Cruz de Tenerife, Spain
- Genomics Division, Institute of Technology and Renewable Energies (ITER), Granadilla de Abona, Spain
- CIBERES, ISCIII, Madrid, Spain
- Department of Clinical Sciences, University Fernando Pessoa Canarias, Las Palmas de Gran Canaria, Spain
- Laboratory of Clinical Immunology and Microbiology, Division of Intramural Research, NIAID, NIH, Bethesda, MD, USA
- NIAID Clinical Genomics Program, NIH, Laboratory of Clinical Immunology and Microbiology, Division of Intramural Research, NIAID, NIH, Bethesda, MD, USA
- Primary Immunodeficiencies Group, University of Antioquia (UdeA), Medellin, Colombia
- School of Microbiology, University of Antioquia (UdeA), Medellin, Colombia
- Neurometabolic Diseases Laboratory, IDIBELL–Hospital Duran I Reynals, CIBERER U759, ISIiii, Madrid, Spain
- Immunology Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA
- Pediatrics Department, Hospital Sant Joan de Déu, Barcelona, Spain
- Department of Molecular Biology and Genetics, Bilkent University, Ankara, Turkey
- Pediatric Rheumatology Division, Hospital Sant Joan de Déu, Barcelona, Spain
- Study Group for Immune Dysfunction Diseases in Children (GEMDIP), Institute of Recerca Sant Joan de Déu, Barcelona, Spain
- Department of Pediatrics, University Hospitals Leuven, Leuven, Belgium
- Department of General Pediatrics and Pediatric Infectious Diseases, Necker Hospital for Sick Children, Assistance Publique–Hôpitaux de Paris (AP-HP), Paris City University, Paris, France
- Biodiversity and Epidemiology of Bacterial Pathogens, Pasteur Institute, Paris, France
- Department of Pediatric Cardiology, Necker Hospital for Sick Children, AP-HP, Paris City University, Paris, France
- Pediatrics Infectious Diseases Division, Hospital Sant Joan de Déu, Barcelona, Spain
- Infectious Diseases and Microbiome, Institute of Recerca Sant Joan de Déu, Barcelona, Spain
- Department of Molecular and Cellular Biology, National Center for Biotechnology (CNB-CSIC), Madrid, Spain
- Laboratory of Virology, Bichat–Claude Bernard Hospital, Paris, France
- Laboratory of Virology, AP-HP, Cochin Hospital, Paris, France
- Molecular Genetics Unit, Institute of Biomedicine of Valencia (IBV-CSIC), Valencia, Spain
- CIBERNED, ISCIII, Madrid, Spain
- Joint Research Unit in Neurology and Molecular Genetics, Institut of Investigation Sanitaria La Fe, Valencia, Spain
- Medical School, Paris City University, Paris, France
- Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
- Bichat–Claude Bernard Hospital, Paris, France
- University Paris Diderot, Paris 7, UFR of Médecine-Bichat, Paris, France
- IAME, INSERM, UMRS1137, Paris City University, Paris, France
- Infectious and Tropical Diseases Department, AP-HP, Bichat–Claude Bernard Hospital, Paris, France
- Department of Biosciences and Nutrition, Karolinska Institutet, Huddinge, Sweden
- Department of Neuroscience and Experimental Therapeutics, Institute for Biomedical Research of Barcelona (IIBB), Spanish National Research Council (CSIC), Barcelona, Spain
- Institute for Biomedical Investigations August Pi i Sunyer (IDIBAPS), Barcelona, Spain
- Department of Pediatrics, University Hospitals Leuven and Laboratory for Inborn Errors of Immunity, KU Leuven, Leuven, Belgium
- Primary Immunodeficiency Research Laboratory, Center for Primary Immunodeficiency Ghent, Ghent University Hospital, Ghent, Belgium
- Neurometabolic Diseases Laboratory, IDIBELL–Hospital Duran I Reynals; and Catalan Institution for Research and Advanced Studies (ICREA), Barcelona, Spain
- CIBERER U759, ISCiii, Madrid, Spain
- Department of Paediatric Infectious Diseases and Virology, Imperial College London, London, UK
- Centre for Paediatrics and Child Health, Faculty of Medicine, Imperial College London, London, UK
- The American Genome Center, Collaborative Health Initiative Research Program, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
- Department of Anatomy, Physiology, and Genetics, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
- Study Center for Primary Immunodeficiencies, Necker Hospital for Sick Children, AP-HP, Paris, France
- New York Genome Center, New York, NY, USA
- Pediatric Hematology-Immunology and Rheumatology Unit, Necker Hospital for Sick Children, AP-HP, Paris, France
- Laboratory of Immunogenetics of Human Diseases, Innate Immunity Group, IdiPAZ Institute for Health Research, La Paz Hospital, Madrid, Spain
- Interdepartmental Group of Immunodeficiencies, Madrid, Spain
- Department of Immunology, University Hospital of Gran Canaria Dr. Negrín, Canarian Health System, Las Palmas de Gran Canaria, Spain
- Laboratory of Human Genetics and Genomics, The Rockefeller University, New York, NY, USA
- Clinical Immunology and Primary Immunodeficiencies Unit, Pediatric Allergy and Clinical Immunology Department, Hospital Sant Joan de Déu, Barcelona, Spain
- Necmettin Erbakan University, Konya, Turkey
- Department of Pediatrics, Department of Microbiology, Immunology and Infectious Diseases, University of Montreal and Immunology and Rheumatology Division, CHU Sainte-Justine, Montreal, QC, Canada
- National Reference Center for Rheumatic, Autoimmune and Systemic Diseases in Children (RAISE), Pediatric Nephrology, Rheumatology, Dermatology Unit, Hospital of Mother and Child, Hospices Civils of Lyon, Lyon, France
- Human Genomics and Evolution, Collège de France, Paris, France
- Department of Pediatrics, Necker Hospital for Sick Children, Paris, France
- Howard Hughes Medical Institute, The Rockefeller University, New York, NY, USA
| | | | - Anna M. Planas
- Department of Neuroscience and Experimental Therapeutics, Institute for Biomedical Research of Barcelona (IIBB), Spanish National Research Council (CSIC), Barcelona, Spain
- Institute for Biomedical Investigations August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Isabelle Meyts
- Department of Pediatrics, University Hospitals Leuven and Laboratory for Inborn Errors of Immunity, KU Leuven, Leuven, Belgium
| | - Filomeen Haerynck
- Primary Immunodeficiency Research Laboratory, Center for Primary Immunodeficiency Ghent, Ghent University Hospital, Ghent, Belgium
| | - Aurora Pujol
- Neurometabolic Diseases Laboratory, IDIBELL–Hospital Duran I Reynals; and Catalan Institution for Research and Advanced Studies (ICREA), Barcelona, Spain
- CIBERER U759, ISCiii, Madrid, Spain
| | - Vanessa Sancho-Shimizu
- Department of Paediatric Infectious Diseases and Virology, Imperial College London, London, UK
- Centre for Paediatrics and Child Health, Faculty of Medicine, Imperial College London, London, UK
| | - Clifford L. Dalgard
- The American Genome Center, Collaborative Health Initiative Research Program, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
- Department of Anatomy, Physiology, and Genetics, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| | - Jacinta Bustamante
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY, USA
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Paris, France
- Paris City University, Imagine Institute, Paris, France
- Study Center for Primary Immunodeficiencies, Necker Hospital for Sick Children, AP-HP, Paris, France
| | - Anne Puel
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY, USA
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Paris, France
- Paris City University, Imagine Institute, Paris, France
| | - Stéphanie Boisson-Dupuis
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY, USA
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Paris, France
- Paris City University, Imagine Institute, Paris, France
| | - Bertrand Boisson
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY, USA
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Paris, France
- Paris City University, Imagine Institute, Paris, France
| | | | - Qian Zhang
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY, USA
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Paris, France
- Paris City University, Imagine Institute, Paris, France
| | - Paul Bastard
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY, USA
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Paris, France
- Paris City University, Imagine Institute, Paris, France
- Pediatric Hematology-Immunology and Rheumatology Unit, Necker Hospital for Sick Children, AP-HP, Paris, France
| | - Luigi Notarangelo
- Laboratory of Clinical Immunology and Microbiology, Division of Intramural Research, NIAID, NIH, Bethesda, MD, USA
| | - Vivien Béziat
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY, USA
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Paris, France
- Paris City University, Imagine Institute, Paris, France
| | - Rebeca Perez de Diego
- Laboratory of Immunogenetics of Human Diseases, Innate Immunity Group, IdiPAZ Institute for Health Research, La Paz Hospital, Madrid, Spain
- Interdepartmental Group of Immunodeficiencies, Madrid, Spain
| | - Carlos Rodriguez-Gallego
- Department of Clinical Sciences, University Fernando Pessoa Canarias, Las Palmas de Gran Canaria, Spain
- Department of Immunology, University Hospital of Gran Canaria Dr. Negrín, Canarian Health System, Las Palmas de Gran Canaria, Spain
| | - Helen C. Su
- Laboratory of Clinical Immunology and Microbiology, Division of Intramural Research, NIAID, NIH, Bethesda, MD, USA
- NIAID Clinical Genomics Program, NIH, Laboratory of Clinical Immunology and Microbiology, Division of Intramural Research, NIAID, NIH, Bethesda, MD, USA
| | - Richard P. Lifton
- Department of Genetics, Yale University School of Medicine, New Haven, CT, USA
- Laboratory of Human Genetics and Genomics, The Rockefeller University, New York, NY, USA
| | - Emmanuelle Jouanguy
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY, USA
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Paris, France
- Paris City University, Imagine Institute, Paris, France
| | - Aurélie Cobat
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY, USA
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Paris, France
- Paris City University, Imagine Institute, Paris, France
| | - Laia Alsina
- Kids Corona Platform, Barcelona, Spain
- Department of Surgery and Surgical Specializations, Faculty of Medicine and Health Sciences, University of Barcelona, Barcelona, Spain
- Study Group for Immune Dysfunction Diseases in Children (GEMDIP), Institute of Recerca Sant Joan de Déu, Barcelona, Spain
- Clinical Immunology and Primary Immunodeficiencies Unit, Pediatric Allergy and Clinical Immunology Department, Hospital Sant Joan de Déu, Barcelona, Spain
| | | | - Elie Haddad
- Department of Pediatrics, Department of Microbiology, Immunology and Infectious Diseases, University of Montreal and Immunology and Rheumatology Division, CHU Sainte-Justine, Montreal, QC, Canada
| | - Laurent Abel
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY, USA
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Paris, France
- Paris City University, Imagine Institute, Paris, France
| | - Alexandre Belot
- International Center of Infectiology Research (CIRI), University of Lyon, INSERM U1111, Claude Bernard University, Lyon 1, CNRS, UMR5308, ENS of Lyon, Lyon, France
- National Reference Center for Rheumatic, Autoimmune and Systemic Diseases in Children (RAISE), Pediatric Nephrology, Rheumatology, Dermatology Unit, Hospital of Mother and Child, Hospices Civils of Lyon, Lyon, France
| | - Lluis Quintana-Murci
- Human Evolutionary Genetics Unit, Institut Pasteur, Paris City University, CNRS UMR 2000, Paris, France
- Human Genomics and Evolution, Collège de France, Paris, France
| | - Charles M. Rice
- Laboratory of Virology and Infectious Disease, The Rockefeller University, New York, NY, USA
| | - Robert H. Silverman
- Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Shen-Ying Zhang
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY, USA
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Paris, France
- Paris City University, Imagine Institute, Paris, France
| | - Jean-Laurent Casanova
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY, USA
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Paris, France
- Paris City University, Imagine Institute, Paris, France
- Department of Pediatrics, Necker Hospital for Sick Children, Paris, France
- Howard Hughes Medical Institute, The Rockefeller University, New York, NY, USA
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Sun H, Chan JFW, Yuan S. Cellular Sensors and Viral Countermeasures: A Molecular Arms Race between Host and SARS-CoV-2. Viruses 2023; 15:352. [PMID: 36851564 PMCID: PMC9962416 DOI: 10.3390/v15020352] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2022] [Revised: 01/23/2023] [Accepted: 01/24/2023] [Indexed: 01/28/2023] Open
Abstract
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is the causative agent of the coronavirus disease 2019 (COVID-19) pandemic that has caused disastrous effects on the society and human health globally. SARS-CoV-2 is a sarbecovirus in the Coronaviridae family with a positive-sense single-stranded RNA genome. It mainly replicates in the cytoplasm and viral components including RNAs and proteins can be sensed by pattern recognition receptors including toll-like receptors (TLRs), RIG-I-like receptors (RLRs), and NOD-like receptors (NLRs) that regulate the host innate and adaptive immune responses. On the other hand, the SARS-CoV-2 genome encodes multiple proteins that can antagonize the host immune response to facilitate viral replication. In this review, we discuss the current knowledge on host sensors and viral countermeasures against host innate immune response to provide insights on virus-host interactions and novel approaches to modulate host inflammation and antiviral responses.
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Affiliation(s)
- Haoran Sun
- Department of Infectious Disease and Microbiology, The University of Hong Kong-Shenzhen Hospital, Shenzhen 518009, China
| | - Jasper Fuk-Woo Chan
- Department of Infectious Disease and Microbiology, The University of Hong Kong-Shenzhen Hospital, Shenzhen 518009, China
- State Key Laboratory of Emerging Infectious Diseases, Carol Yu Centre for Infection, Department of Microbiology, School of Clinical Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
- Centre for Virology, Vaccinology and Therapeutics, Hong Kong Science and Technology Park, Hong Kong, China
| | - Shuofeng Yuan
- Department of Infectious Disease and Microbiology, The University of Hong Kong-Shenzhen Hospital, Shenzhen 518009, China
- State Key Laboratory of Emerging Infectious Diseases, Carol Yu Centre for Infection, Department of Microbiology, School of Clinical Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
- Centre for Virology, Vaccinology and Therapeutics, Hong Kong Science and Technology Park, Hong Kong, China
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10
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Lightfoot HL, Smith GF. Targeting RNA with small molecules-A safety perspective. Br J Pharmacol 2023. [PMID: 36631428 DOI: 10.1111/bph.16027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 06/30/2022] [Accepted: 12/20/2022] [Indexed: 01/13/2023] Open
Abstract
RNA is a major player in cellular function, and consequently can drive a number of disease pathologies. Over the past several years, small molecule-RNA targeting (smRNA targeting) has developed into a promising drug discovery approach. Numerous techniques, tools, and assays have been developed to support this field, and significant investments have been made by pharmaceutical and biotechnology companies. To date, the focus has been on identifying disease validated primary targets for smRNA drug development, yet RNA as a secondary (off) target for all small molecule drug programs largely has been unexplored. In this perspective, we discuss structure, target, and mechanism-driven safety aspects of smRNAs and highlight how these parameters can be evaluated in drug discovery programs to produce potentially safer drugs.
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Affiliation(s)
- Helen L Lightfoot
- Safety and Mechanistic Pharmacology, Clinical Pharmacology and Safety Sciences, R&D, AstraZeneca, Cambridge, UK
| | - Graham F Smith
- Data Science and AI, Clinical Pharmacology and Safety Sciences, R&D, AstraZeneca, Cambridge, UK
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11
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Junghare V, Alex R, Baidya A, Paul M, Alyethodi RR, Sengar GS, Kumar S, Singh U, Deb R, Hazra S. In silico modeling revealed new insights into the mechanism of action of enzyme 2'-5'-oligoadenylate synthetase in cattle. J Biomol Struct Dyn 2022; 40:14013-14026. [PMID: 34873989 DOI: 10.1080/07391102.2021.2001373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The innate immune system has an important role in developing the initial resistance to virus infection, and the ability of oligoadenylate synthetase to overcome viral evasion and enhance innate immunity is already established in humans. In the present study, we have tried to explore the molecular and structural variations present in Sahiwal (indigenous) and crossbred (Frieswal) cattle to identify the molecular mechanism of action of OAS1 gene in activation of innate immune response. The significant changes in structural alignment in terms of orientation of loops, shortening of β-sheets and formation of 3-10 α-helix was noticed in Sahiwal and Frieswal cattle. Further, it has been observed that OAS1 from Sahiwal had better binding with APC and DTP ligand than Frieswal OAS1. A remarkable change was seen in orientation at the nucleoside base region of both the ligands, which are bound with OAS1 protein from Frieswal and Sahiwal cattle. The Molecular Dynamic study of apo and ligand complex structures was provided more insight towards the stability of OAS1 from both cattle. This analysis displayed that the Sahiwal cattle protein has more steady nature throughout the simulation and has better binding towards Frieswal in terms of APC and DTP binding. Thus, OAS1 protein is the potential target for explaining the innate immune response in Sahiwal than Frieswal.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Vivek Junghare
- Department of Biotechnology, Indian Institute of Technology Roorkee, Roorkee, India
| | - Rani Alex
- ICAR-Central Institute for Research on Cattle, Meerut Cantt, India
| | - Apoorva Baidya
- Department of Chemistry, Indian Intitute of Technology Bombay, Mumbai, India
| | - Manish Paul
- Department of Biotechnology, Maharaja Sriram Chandra Bhanja Deo University, Baripada, India
| | | | | | - Sushil Kumar
- ICAR-National Research Center on Pig, Guwahati, India
| | - Umesh Singh
- ICAR-National Research Center on Pig, Guwahati, India
| | - Rajib Deb
- ICAR-National Research Center on Pig, Guwahati, India
| | - Saugata Hazra
- Department of Biotechnology, Indian Institute of Technology Roorkee, Roorkee, India.,Center of Nanotechnology, Indian Institute of Technology Roorkee, Roorkee, India
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12
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Rotavirus NSP1 Subverts the Antiviral Oligoadenylate Synthetase-RNase L Pathway by Inducing RNase L Degradation. mBio 2022; 13:e0299522. [PMID: 36413023 PMCID: PMC9765674 DOI: 10.1128/mbio.02995-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The interferon (IFN)-inducible 2',5'-oligoadenylate synthetase (OAS)-RNase L pathway plays a critical role in antiviral immunity. Group A rotaviruses, including the simian SA11 strain, inhibit this pathway through two activities: an E3-ligase related activity of NSP1 that degrades proteins necessary for IFN signaling, and a phosphodiesterase (PDE) activity of VP3 that hydrolyzes the RNase L-activator 2',5'-oligoadenylate. Unexpectedly, we found that a recombinant (r) SA11 double mutant virus deficient in both activities (rSA11-VP3H797R-NSP1ΔC17) retained the ability to prevent RNase L activation. Mass spectrometry led to the discovery that NSP1 interacts with RNase L in rSA11-infected HT29 cells. This interaction was confirmed through copulldown assay of cells transiently expressing NSP1 and RNase L. Immunoblot analysis showed that infection with wild-type rSA11 virus, rSA11-VP3H797R-NSP1ΔC17 double mutant virus, or single mutant forms of the latter virus all resulted in the depletion of endogenous RNase L. The loss of RNase L was reversed by addition of the neddylation inhibitor MLN4924, but not the proteasome inhibitor MG132. Analysis of additional mutant forms of rSA11 showed that RNase L degradation no longer occurred when either the N-terminal RING domain of NSP1 was mutated or the C-terminal 98 amino acids of NSP1 were deleted. The C-terminal RNase L degradation domain is positioned upstream and is functionally independent of the NSP1 domain necessary for inhibiting IFN expression. Our studies reveal a new role for NSP1 and its E3-ligase related activity as an antagonist of RNase L and uncover a novel virus-mediated strategy of inhibiting the OAS-RNase L pathway. IMPORTANCE For productive infection, rotavirus and other RNA viruses must suppress interferon (IFN) signaling and the expression of IFN-stimulated antiviral gene products. Particularly important is inhibiting the interferon (IFN)-inducible 2',5'-oligoadenylate synthetase (OAS)-RNase L pathway, as activated RNase L can direct the nonspecific degradation of viral and cellular RNAs, thereby blocking viral replication and triggering cell death pathways. In this study, we have discovered that the simian SA11 strain of rotavirus employs a novel strategy of inhibiting the OAS-RNase L pathway. This strategy is mediated by SA11 NSP1, a nonstructural protein that hijacks E3 cullin-RING ligases, causing the ubiquitination and degradation of host proteins essential for IFN induction. Our analysis shows that SA11 NSP1 also recognizes and causes the ubiquitination of RNase L, an activity resulting in depletion of endogenous RNase L. These data raise the possibility of using therapeutics targeting cellular E3 ligases to control rotavirus infections.
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13
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Doratt BM, Vance E, Malherbe DC, Ebbert MT, Messaoudi I. Transcriptional response to VZV infection is modulated by RNA polymerase III in lung epithelial cell lines. Front Cell Infect Microbiol 2022; 12:943587. [PMID: 35959363 PMCID: PMC9359802 DOI: 10.3389/fcimb.2022.943587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Accepted: 06/30/2022] [Indexed: 11/13/2022] Open
Abstract
Ancestral RNA polymerase III (Pol III) is a multi-subunit polymerase responsible for transcription of short non-coding RNA, such as double-stranded short interspersed nuclear elements (SINEs). Although SINE ncRNAs are generally transcriptionally repressed, they can be induced in response to viral infections and can stimulate immune signaling pathways. Indeed, mutations in RNA Pol III have been associated with poor antiviral interferon response following infection with varicella zoster virus (VZV). In this study, we probed the role of Pol III transcripts in the detection and initial immune response to VZV by characterizing the transcriptional response following VZV infection of wild type A549 lung epithelial cells as well as A549 cells lacking specific RNA sensors MAVS and TLR3, or interferon-stimulated genes RNase L and PKR in presence or absence of functional RNA Pol III. Multiple components of the antiviral sensing and interferon signaling pathways were involved in restricting VZV replication in lung epithelial cells thus suggesting an innate defense system with built-in redundancy. In addition, RNA Pol III silencing altered the antiviral transcriptional program indicating that it plays an essential role in the sensing of VZV infection.
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Affiliation(s)
- Brianna M. Doratt
- Department of Microbiology, Immunology and Molecular Genetics, College of Medicine, University of Kentucky, Lexington, KY, United States
| | - Elizabeth Vance
- Sanders-Brown Center on Aging, University of Kentucky, Lexington, KY, United States
- Department of Internal Medicine, Division of Biomedical Informatics, University of Kentucky, Lexington, KY, United States
- Department of Neuroscience, University of Kentucky, Lexington, KY, United States
| | - Delphine C. Malherbe
- Department of Microbiology, Immunology and Molecular Genetics, College of Medicine, University of Kentucky, Lexington, KY, United States
| | - Mark T.W. Ebbert
- Sanders-Brown Center on Aging, University of Kentucky, Lexington, KY, United States
- Department of Internal Medicine, Division of Biomedical Informatics, University of Kentucky, Lexington, KY, United States
- Department of Neuroscience, University of Kentucky, Lexington, KY, United States
| | - Ilhem Messaoudi
- Department of Microbiology, Immunology and Molecular Genetics, College of Medicine, University of Kentucky, Lexington, KY, United States
- *Correspondence: Ilhem Messaoudi,
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14
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Knabl L, Lee HK, Wieser M, Mur A, Zabernigg A, Knabl L, Rauch S, Bock M, Schumacher J, Kaiser N, Furth PA, Hennighausen L. BNT162b2 vaccination enhances interferon-JAK-STAT-regulated antiviral programs in COVID-19 patients infected with the SARS-CoV-2 Beta variant. COMMUNICATIONS MEDICINE 2022; 2:17. [PMID: 35465056 PMCID: PMC9029844 DOI: 10.1038/s43856-022-00083-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2021] [Accepted: 02/01/2022] [Indexed: 12/12/2022] Open
Abstract
Background SARS-CoV-2 infection activates interferon-controlled signaling pathways and elicits a wide spectrum of immune responses and clinical manifestations in human patients. Methods Here, we investigate the impact of prior vaccination on the innate immune response of hospitalized COVID-19 patients infected with the SARS-CoV-2 Beta variant through RNA sequencing of peripheral blood immune cells. Four patients had received the first dose of BNT162b2 about 11 days prior to the onset of COVID-19 symptoms and five patients were unvaccinated. Patients had received dexamethasone treatment. Immune transcriptomes were obtained at days 7-13, 20-32 and 42-60 after first symptomology. Results RNA-seq reveals an enhanced JAK-STAT-mediated immune transcriptome response at day 10 in vaccinated patients as compared to unvaccinated ones. This increase subsides by day 35. Expression of the gene encoding the antiviral protein oligoadenylate synthetase (OAS) 1, which is inversely correlated with disease severity, and other key antiviral proteins increases in the vaccinated group. We also investigate the immune transcriptome in naïve individuals receiving their first dose of BNT162b2 and identify a gene signature shared with the vaccinated COVID-19 patients. Conclusions Our study demonstrates that RNA-seq can be used to monitor molecular immune responses elicited by the BNT162b2 vaccine, both in naïve individuals and in COVID-19 patients, and it provides a biomarker-based approach to systems vaccinology.
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Affiliation(s)
| | - Hye Kyung Lee
- National Institute of Diabetes, Digestive and Kidney Diseases, Bethesda, MD 20892 USA
| | | | - Anna Mur
- Division of Internal Medicine, Krankenhaus Kufstein, Kufstein, Austria
| | - August Zabernigg
- Division of Internal Medicine, Krankenhaus Kufstein, Kufstein, Austria
| | | | - Simon Rauch
- Division of Anesthesia and Intensive Care Medicine, Krankenhaus Meran, Meran, Italy
| | - Matthias Bock
- Division of Anesthesia and Intensive Care Medicine, Krankenhaus Meran, Meran, Italy
- Department of Anesthesiology, perioperative Medicine and Intensive Care Medicine, Paracelsus Medical University, Salzburg, Austria
| | - Jana Schumacher
- Division of Internal Medicine, Krankenhaus St. Johann, St. Johann, Austria
| | - Norbert Kaiser
- Division of Internal Medicine, Krankenhaus St. Johann, St. Johann, Austria
| | - Priscilla A. Furth
- Departments of Oncology & Medicine, Georgetown University, Washington, DC USA
| | - Lothar Hennighausen
- National Institute of Diabetes, Digestive and Kidney Diseases, Bethesda, MD 20892 USA
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15
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Tang J, Dong B, Liu M, Liu S, Niu X, Gaughan C, Asthana A, Zhou H, Xu Z, Zhang G, Silverman RH, Huang H. Identification of Small Molecule Inhibitors of RNase L by Fragment-Based Drug Discovery. J Med Chem 2022; 65:1445-1457. [PMID: 34841869 PMCID: PMC10620946 DOI: 10.1021/acs.jmedchem.1c01156] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The pseudokinase-endoribonuclease RNase L plays important roles in antiviral innate immunity and is also implicated in many other cellular activities. The inhibition of RNase L showed therapeutic potential for Aicardi-Goutières syndrome (AGS). Thus, RNase L is a promising drug target. In this study, using an enzyme assay and NMR screening, we discovered 13 inhibitory fragments against RNase L. Cocrystal structures of RNase L separately complexed with two different fragments were determined in which both fragments bound to the ATP-binding pocket of the pseudokinase domain. Myricetin, vitexin, and hyperoside, three natural products sharing similar scaffolds with the fragment AC40357, demonstrated a potent inhibitory activity in vitro. In addition, myricetin has a promising cellular inhibitory activity. A cocrystal structure of RNase L with myricetin provided a structural basis for inhibitor design by allosterically modulating the ribonuclease activity. Our findings demonstrate that fragment screening can lead to the discovery of natural product inhibitors of RNase L.
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Affiliation(s)
- Jinle Tang
- State Key Laboratory of Chemical Oncogenomics, Laboratory of Structural Biology and Drug Discovery, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Beihua Dong
- Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Ming Liu
- State Key Laboratory of Chemical Oncogenomics, Laboratory of Structural Biology and Drug Discovery, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Shuyan Liu
- National Clinical Research Center for Infectious Diseases, Shenzhen Third People’s Hospital, Southern University of Science and Technology, Shenzhen 518112, China
| | - Xiaogang Niu
- College of Chemistry and Molecular Engineering, Beijing Nuclear Magnetic Resonance Center, Peking University, Beijing 100871, China
| | - Christina Gaughan
- Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Abhishek Asthana
- Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Huan Zhou
- Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, China
| | - Zhengshuang Xu
- State Key Laboratory of Chemical Oncogenomics, Laboratory of Structural Biology and Drug Discovery, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Guoliang Zhang
- National Clinical Research Center for Infectious Diseases, Shenzhen Third People’s Hospital, Southern University of Science and Technology, Shenzhen 518112, China
| | - Robert H. Silverman
- Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Hao Huang
- State Key Laboratory of Chemical Oncogenomics, Laboratory of Structural Biology and Drug Discovery, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen 518055, China
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16
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African Swine Fever Virus CD2v Protein Induces β-Interferon Expression and Apoptosis in Swine Peripheral Blood Mononuclear Cells. Viruses 2021; 13:v13081480. [PMID: 34452346 PMCID: PMC8402892 DOI: 10.3390/v13081480] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 07/23/2021] [Accepted: 07/25/2021] [Indexed: 12/12/2022] Open
Abstract
African swine fever (ASF) is a hemorrhagic disease of swine characterized by massive lymphocyte depletion in lymphoid tissues due to the apoptosis of B and T cells, a process likely triggered by factors released or secreted by infected macrophages. ASFV CD2v (EP402R) has been implicated in viral virulence and immunomodulation in vitro; however, its actual function(s) remains unknown. We found that CD2v expression in swine PK15 cells induces NF-κB-dependent IFN-β and ISGs transcription and an antiviral state. Similar results were observed for CD2v protein treated swine PBMCs and macrophages, the major ASFV target cell. Notably, treatment of swine PBMCs and macrophages with CD2v protein induced apoptosis. Immunoprecipitation and colocalization studies revealed that CD2v interacts with CD58, the natural host CD2 ligand. Additionally, CD58 knockdown in cells or treatment of cells with an NF-κB inhibitor significantly reduced CD2v-mediated NF-κB activation and IFN-β induction. Further, antibodies directed against CD2v inhibited CD2v-induced NF-κB activation and IFN-β transcription in cells. Overall, results indicate that ASFV CD2v activates NF-κB, which induces IFN signaling and apoptosis in swine lymphocytes/macrophages. We propose that CD2v released from infected macrophages may be a significant factor in lymphocyte apoptosis observed in lymphoid tissue during ASFV infection in pigs.
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17
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Karasik A, Jones GD, DePass AV, Guydosh NR. Activation of the antiviral factor RNase L triggers translation of non-coding mRNA sequences. Nucleic Acids Res 2021; 49:6007-6026. [PMID: 33556964 DOI: 10.1093/nar/gkab036] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 01/06/2021] [Accepted: 02/03/2021] [Indexed: 11/15/2022] Open
Abstract
Ribonuclease L (RNase L) is activated as part of the innate immune response and plays an important role in the clearance of viral infections. When activated, it endonucleolytically cleaves both viral and host RNAs, leading to a global reduction in protein synthesis. However, it remains unknown how widespread RNA decay, and consequent changes in the translatome, promote the elimination of viruses. To study how this altered transcriptome is translated, we assayed the global distribution of ribosomes in RNase L activated human cells with ribosome profiling. We found that RNase L activation leads to a substantial increase in the fraction of translating ribosomes in ORFs internal to coding sequences (iORFs) and ORFs within 5' and 3' UTRs (uORFs and dORFs). Translation of these alternative ORFs was dependent on RNase L's cleavage activity, suggesting that mRNA decay fragments are translated to produce short peptides that may be important for antiviral activity.
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Affiliation(s)
- Agnes Karasik
- Laboratory of Biochemistry and Genetics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892, USA.,Postdoctoral Research Associate Training Program, National Institute of General Medical Sciences, National Institutes of Health, Bethesda, MD 20892, USA
| | - Grant D Jones
- Laboratory of Biochemistry and Genetics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Andrew V DePass
- Laboratory of Biochemistry and Genetics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Nicholas R Guydosh
- Laboratory of Biochemistry and Genetics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892, USA
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18
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Zika virus employs the host antiviral RNase L protein to support replication factory assembly. Proc Natl Acad Sci U S A 2021; 118:2101713118. [PMID: 34031250 DOI: 10.1073/pnas.2101713118] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Infection with the flavivirus Zika virus (ZIKV) can result in tissue tropism, disease outcome, and route of transmission distinct from those of other flaviviruses; therefore, we aimed to identify host machinery that exclusively promotes the ZIKV replication cycle, which can inform on differences at the organismal level. We previously reported that deletion of the host antiviral ribonuclease L (RNase L) protein decreases ZIKV production. Canonical RNase L catalytic activity typically restricts viral infection, including that of the flavivirus dengue virus (DENV), suggesting an unconventional, proviral RNase L function during ZIKV infection. In this study, we reveal that an inactive form of RNase L supports assembly of ZIKV replication factories (RFs) to enhance infectious virus production. Compared with the densely concentrated ZIKV RFs generated with RNase L present, deletion of RNase L induced broader subcellular distribution of ZIKV replication intermediate double-stranded RNA (dsRNA) and NS3 protease, two constituents of ZIKV RFs. An inactive form of RNase L was sufficient to contain ZIKV genome and dsRNA within a smaller RF area, which subsequently increased infectious ZIKV release from the cell. Inactive RNase L can interact with cytoskeleton, and flaviviruses remodel cytoskeleton to construct RFs. Thus, we used the microtubule-stabilization drug paclitaxel to demonstrate that ZIKV repurposes RNase L to facilitate the cytoskeleton rearrangements required for proper generation of RFs. During infection with flaviviruses DENV or West Nile Kunjin virus, inactive RNase L did not improve virus production, suggesting that a proviral RNase L role is not a general feature of all flavivirus infections.
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19
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SARS-CoV-2 induces double-stranded RNA-mediated innate immune responses in respiratory epithelial-derived cells and cardiomyocytes. Proc Natl Acad Sci U S A 2021; 118:2022643118. [PMID: 33811184 PMCID: PMC8072330 DOI: 10.1073/pnas.2022643118] [Citation(s) in RCA: 133] [Impact Index Per Article: 44.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
SARS-CoV-2 emergence in late 2019 led to the COVID-19 pandemic that has had devastating effects on human health and the economy. While early innate immune responses are essential for protection against virus invasion and inadequate responses are associated with severe COVID-19 disease, gaps remain in our knowledge about the interaction of SARS-CoV-2 with host antiviral pathways. We characterized the innate immune response to SARS-CoV-2 in relevant respiratory tract-derived cells and cardiomyocytes and found that SARS-CoV-2 activates two antiviral pathways, oligoadenylate synthetase–ribonuclease L and protein kinase R, while inducing minimal levels of interferon. This is in contrast to Middle East respiratory syndrome-CoV, which inhibits all three pathways. Activation of these pathways may contribute to the distinctive pathogenesis of SARS-CoV-2. Coronaviruses are adept at evading host antiviral pathways induced by viral double-stranded RNA, including interferon (IFN) signaling, oligoadenylate synthetase–ribonuclease L (OAS-RNase L), and protein kinase R (PKR). While dysregulated or inadequate IFN responses have been associated with severe coronavirus infection, the extent to which the recently emerged SARS-CoV-2 activates or antagonizes these pathways is relatively unknown. We found that SARS-CoV-2 infects patient-derived nasal epithelial cells, present at the initial site of infection; induced pluripotent stem cell-derived alveolar type 2 cells (iAT2), the major cell type infected in the lung; and cardiomyocytes (iCM), consistent with cardiovascular consequences of COVID-19 disease. Robust activation of IFN or OAS-RNase L is not observed in these cell types, whereas PKR activation is evident in iAT2 and iCM. In SARS-CoV-2–infected Calu-3 and A549ACE2 lung-derived cell lines, IFN induction remains relatively weak; however, activation of OAS-RNase L and PKR is observed. This is in contrast to Middle East respiratory syndrome (MERS)-CoV, which effectively inhibits IFN signaling and OAS-RNase L and PKR pathways, but is similar to mutant MERS-CoV lacking innate immune antagonists. Remarkably, OAS-RNase L and PKR are activated in MAVS knockout A549ACE2 cells, demonstrating that SARS-CoV-2 can induce these host antiviral pathways despite minimal IFN production. Moreover, increased replication and cytopathic effect in RNASEL knockout A549ACE2 cells implicates OAS-RNase L in restricting SARS-CoV-2. Finally, while SARS-CoV-2 fails to antagonize these host defense pathways, which contrasts with other coronaviruses, the IFN signaling response is generally weak. These host–virus interactions may contribute to the unique pathogenesis of SARS-CoV-2.
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20
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Pillon MC, Gordon J, Frazier MN, Stanley RE. HEPN RNases - an emerging class of functionally distinct RNA processing and degradation enzymes. Crit Rev Biochem Mol Biol 2021; 56:88-108. [PMID: 33349060 PMCID: PMC7856873 DOI: 10.1080/10409238.2020.1856769] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 11/06/2020] [Accepted: 11/24/2020] [Indexed: 10/22/2022]
Abstract
HEPN (Higher Eukaryotes and Prokaryotes Nucleotide-binding) RNases are an emerging class of functionally diverse RNA processing and degradation enzymes. Members are defined by a small α-helical bundle encompassing a short consensus RNase motif. HEPN dimerization is a universal requirement for RNase activation as the conserved RNase motifs are precisely positioned at the dimer interface to form a composite catalytic center. While the core HEPN fold is conserved, the organization surrounding the HEPN dimer can support large structural deviations that contribute to their specialized functions. HEPN RNases are conserved throughout evolution and include bacterial HEPN RNases such as CRISPR-Cas and toxin-antitoxin associated nucleases, as well as eukaryotic HEPN RNases that adopt large multi-component machines. Here we summarize the canonical elements of the growing HEPN RNase family and identify molecular features that influence RNase function and regulation. We explore similarities and differences between members of the HEPN RNase family and describe the current mechanisms for HEPN RNase activation and inhibition.
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Affiliation(s)
- Monica C. Pillon
- Signal Transduction Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, 111 T. W. Alexander Drive, Research Triangle Park, NC 27709, USA
| | - Jacob Gordon
- Signal Transduction Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, 111 T. W. Alexander Drive, Research Triangle Park, NC 27709, USA
| | - Meredith N. Frazier
- Signal Transduction Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, 111 T. W. Alexander Drive, Research Triangle Park, NC 27709, USA
| | - Robin E. Stanley
- Signal Transduction Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, 111 T. W. Alexander Drive, Research Triangle Park, NC 27709, USA
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21
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Abstract
The development of safe and effective vaccines against viruses is central to disease control. With advancements in DNA synthesis technology, the production of synthetic viral genomes has fueled many research efforts that aim to generate attenuated viruses by introducing synonymous mutations. Elucidation of the mechanisms underlying virus attenuation through synonymous mutagenesis is revealing interesting new biology that can be exploited for vaccine development. Here, we review recent advancements in this field of synthetic virology and focus on the molecular mechanisms of attenuation by genetic recoding of viruses. We highlight the action of the zinc finger antiviral protein (ZAP) and RNase L, two proteins involved in the inhibition of viruses enriched for CpG and UpA dinucleotides, that are often the products of virus recoding algorithms. Additionally, we discuss current challenges in the field as well as studies that may illuminate how other host functions, such as translation, are potentially involved in the attenuation of recoded viruses.
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22
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Li Y, Renner DM, Comar CE, Whelan JN, Reyes HM, Cardenas-Diaz FL, Truitt R, Tan LH, Dong B, Alysandratos KD, Huang J, Palmer JN, Adappa ND, Kohanski MA, Kotton DN, Silverman RH, Yang W, Morrisey E, Cohen NA, Weiss SR. SARS-CoV-2 induces double-stranded RNA-mediated innate immune responses in respiratory epithelial derived cells and cardiomyocytes. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2020. [PMID: 32995797 DOI: 10.1101/2020.09.24.312553] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Coronaviruses are adept at evading host antiviral pathways induced by viral double-stranded RNA, including interferon (IFN) signaling, oligoadenylate synthetase-ribonuclease L (OAS-RNase L), and protein kinase R (PKR). While dysregulated or inadequate IFN responses have been associated with severe coronavirus infection, the extent to which the recently emerged SARS-CoV-2 activates or antagonizes these pathways is relatively unknown. We found that SARS-CoV-2 infects patient-derived nasal epithelial cells, present at the initial site of infection, induced pluripotent stem cell-derived alveolar type 2 cells (iAT2), the major cell type infected in the lung, and cardiomyocytes (iCM), consistent with cardiovascular consequences of COVID-19 disease. Robust activation of IFN or OAS-RNase L is not observed in these cell types, while PKR activation is evident in iAT2 and iCM. In SARS-CoV-2 infected Calu-3 and A549 ACE2 lung-derived cell lines, IFN induction remains relatively weak; however activation of OAS-RNase L and PKR is observed. This is in contrast to MERS-CoV, which effectively inhibits IFN signaling as well as OAS-RNase L and PKR pathways, but similar to mutant MERS-CoV lacking innate immune antagonists. Remarkably, both OAS-RNase L and PKR are activated in MAVS knockout A549 ACE2 cells, demonstrating that SARS-CoV-2 can induce these host antiviral pathways despite minimal IFN production. Moreover, increased replication and cytopathic effect in RNASEL knockout A549 ACE2 cells implicates OAS-RNase L in restricting SARS-CoV-2. Finally, while SARS-CoV-2 fails to antagonize these host defense pathways, which contrasts with other coronaviruses, the IFN signaling response is generally weak. These host-virus interactions may contribute to the unique pathogenesis of SARS-CoV-2. Significance SARS-CoV-2 emergence in late 2019 led to the COVID-19 pandemic that has had devastating effects on human health and the economy. Early innate immune responses are essential for protection against virus invasion. While inadequate innate immune responses are associated with severe COVID-19 diseases, understanding of the interaction of SARS-CoV-2 with host antiviral pathways is minimal. We have characterized the innate immune response to SARS-CoV-2 infections in relevant respiratory tract derived cells and cardiomyocytes and found that SARS-CoV-2 activates two antiviral pathways, oligoadenylate synthetase-ribonuclease L (OAS-RNase L), and protein kinase R (PKR), while inducing minimal levels of interferon. This in contrast to MERS-CoV which inhibits all three pathways. Activation of these pathways may contribute to the distinctive pathogenesis of SARS-CoV-2.
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23
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Teoh PJ, Koh MY, Chng WJ. ADARs, RNA editing and more in hematological malignancies. Leukemia 2020; 35:346-359. [PMID: 33139858 DOI: 10.1038/s41375-020-01076-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 08/21/2020] [Accepted: 10/20/2020] [Indexed: 02/08/2023]
Abstract
Adenosine-to-inosine (A-to-I) editing is the most prevalent type of RNA editing in humans, mediated by the adenosine deaminases acting on RNA (ADARs). Physiologically, these enzymes are present in the nucleus and/or the cytoplasm, where they catalyze the conversion of adenosines (A) to inosines (I) on double-stranded mRNA molecules. Aberrant ADAR-mediated-editing is a prominent feature in a variety of cancers. Importantly, the biological functions of ADARs and its functional implications in hematological malignancies have recently been unraveled. In this review, we will highlight the functions of ADARs and their involvements in cancer, specifically in hematological malignancies. RNA editing-independent function of cellular processes by ADARs and the potential of developing novel therapeutic approaches revolving RNA editing will also be discussed.
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Affiliation(s)
- Phaik Ju Teoh
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.,Cancer Science Institute of Singapore, Singapore, Singapore
| | - Mun Yee Koh
- Cancer Science Institute of Singapore, Singapore, Singapore
| | - Wee Joo Chng
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore. .,Cancer Science Institute of Singapore, Singapore, Singapore. .,Department of Haematology-Oncology, National University Cancer Institute of Singapore, National University Health System, Singapore, Singapore.
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24
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Kumar V. Emerging Human Coronavirus Infections (SARS, MERS, and COVID-19): Where They Are Leading Us. Int Rev Immunol 2020; 40:5-53. [PMID: 32744465 DOI: 10.1080/08830185.2020.1800688] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Coronavirus infections are responsible for mild, moderate, and severe infections in birds and mammals. These were first isolated in humans as causal microorganisms responsible for common cold. The 2002-2003 SARS epidemic caused by SARS-CoV and 2012 MERS epidemic (64 countries affected) caused by MERS-CoV showed their acute and fatal side. These two CoV infections killed thousands of patients infected worldwide. However, WHO has still reported the MERS case in December 2019 in middle-eastern country (Saudi Arabia), indicating the MERS epidemic has not ended completely yet. Although we have not yet understood completely these two CoV epidemics, a third most dangerous and severe CoV infection has been originated in the Wuhan city, Hubei district of China in December 2019. This CoV infection called COVID-19 or SARS-CoV2 infection has now spread to 210 countries and territories around the world. COVID-19 has now been declared a pandemic by the World Health Organization (WHO). It has infected more than 16.69 million people with more than 663,540 deaths across the world. Thus the current manuscript aims to describe all three (SARS, MERS, and COVID-19) in terms of their causal organisms (SARS-CoV, MERS-CoV, and SARS-CoV2), similarities and differences in their clinical symptoms, outcomes, immunology, and immunopathogenesis, and possible future therapeutic approaches.
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Affiliation(s)
- Vijay Kumar
- Children's Health Queensland Clinical Unit, School of Clinical Medicine, Faculty of Medicine, Mater Research, University of Queensland, Brisbane, Queensland, Australia.,School of Biomedical Sciences, Faculty of Medicine, University of Queensland, Brisbane, Queensland, Australia
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25
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RNase L Amplifies Interferon Signaling by Inducing Protein Kinase R-Mediated Antiviral Stress Granules. J Virol 2020; 94:JVI.00205-20. [PMID: 32295917 PMCID: PMC7307175 DOI: 10.1128/jvi.00205-20] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Accepted: 04/08/2020] [Indexed: 02/07/2023] Open
Abstract
Double-stranded RNAs produced during viral infections serve as pathogen-associated molecular patterns (PAMPs) and bind pattern recognition receptors to stimulate IFN production. RNase L is an IFN-regulated endoribonuclease that is activated in virus-infected cells and cleaves single-stranded viral and cellular RNAs. The RNase L-cleaved dsRNAs signal to Rig-like helicases to amplify IFN production. This study identifies a novel role of antiviral stress granules induced by RNase L as an antiviral signaling hub to coordinate the RNA ligands with cognate receptors to mount an effective host response during viral infections. Virus infection leads to activation of the interferon (IFN)-induced endoribonuclease RNase L, which results in degradation of viral and cellular RNAs. Both cellular and viral RNA cleavage products of RNase L bind pattern recognition receptors (PRRs), like retinoic acid-inducible I (Rig-I) and melanoma differentiation-associated protein 5 (MDA5), to further amplify IFN production and antiviral response. Although much is known about the mechanics of ligand binding and PRR activation, how cells coordinate RNA sensing with signaling response and interferon production remains unclear. We show that RNA cleavage products of RNase L activity induce the formation of antiviral stress granules (avSGs) by regulating activation of double-stranded RNA (dsRNA)-dependent protein kinase R (PKR) and recruit the antiviral proteins Rig-I, PKR, OAS, and RNase L to avSGs. Biochemical analysis of purified avSGs showed interaction of a key stress granule protein, G3BP1, with only PKR and Rig-I and not with OAS or RNase L. AvSG assembly during RNase L activation is required for IRF3-mediated IFN production, but not IFN signaling or proinflammatory cytokine induction. Consequently, cells lacking avSG formation or RNase L signaling produced less IFN and showed higher susceptibility during Sendai virus infection, demonstrating the importance of avSGs in RNase L-mediated host defense. We propose a role during viral infection for RNase L-cleaved RNAs in inducing avSGs containing antiviral proteins to provide a platform for efficient interaction of RNA ligands with pattern recognition receptors to enhance IFN production to mount an effective antiviral response. IMPORTANCE Double-stranded RNAs produced during viral infections serve as pathogen-associated molecular patterns (PAMPs) and bind pattern recognition receptors to stimulate IFN production. RNase L is an IFN-regulated endoribonuclease that is activated in virus-infected cells and cleaves single-stranded viral and cellular RNAs. The RNase L-cleaved dsRNAs signal to Rig-like helicases to amplify IFN production. This study identifies a novel role of antiviral stress granules induced by RNase L as an antiviral signaling hub to coordinate the RNA ligands with cognate receptors to mount an effective host response during viral infections.
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26
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Panda BSK, Mohapatra SK, Chaudhary D, Alhussien MN, Kapila R, Dang AK. Proteomics and transcriptomics study reveals the utility of ISGs as novel molecules for early pregnancy diagnosis in dairy cows. J Reprod Immunol 2020; 140:103148. [PMID: 32447181 DOI: 10.1016/j.jri.2020.103148] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 04/22/2020] [Accepted: 05/07/2020] [Indexed: 01/10/2023]
Abstract
An early and precise diagnosis of pregnancy in cows is critical to short the calving interval and to improve their reproductive efficiency. Neutrophils are the first blood cells to sensitize the embryo in the uterus and participate in maternal recognition of pregnancy after getting induced by interferon tau (IFNτ). To study the protein abundance ratio, blood samples were collected on 0th, 10th, 18th and 36th day post-artificial insemination (AI) from crossbred Karan Fries cows. Neutrophils were isolated through density gradient centrifugation and studied for protein abundance by high-performance liquid chromatography coupled with mass spectrometry (LC-MS). Protein abundance ratios for Myxovirus resistance (MX1 and MX2) were found to be higher (P < 0.05) on day 10 and day 18 post-AI, whereas Oligoadenylate synthetase-1 (OAS1) and Interferon stimulated gene-15 ubiquitin-like modifier (ISG15) proteins were more abundant on day 18 post-AI. The relative mRNA expressions of these molecules were also studied by qPCR. The gene expression of ISG15, MX1, MX2 and OAS1 was found to be higher (P < 0.05) on day 10th, 18th and 36th post-AI compared to day 0. The study indicates that ISGs on blood neutrophils are essential for the establishment of pregnancy and may be targeted as potential biomarkers for pregnancy diagnosis in cows.
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Affiliation(s)
- Bibhudatta S K Panda
- Lactation and Immuno-Physiology Laboratory, ICAR-National Dairy Research Institute, Karnal, Haryana 132001, India
| | - Sunil Kumar Mohapatra
- Department of Animal Biochemistry, ICAR-National Dairy Research Institute, Karnal, Haryana 132001, India
| | - Dheeraj Chaudhary
- Lactation and Immuno-Physiology Laboratory, ICAR-National Dairy Research Institute, Karnal, Haryana 132001, India
| | | | - Rajeev Kapila
- Department of Animal Biochemistry, ICAR-National Dairy Research Institute, Karnal, Haryana 132001, India
| | - Ajay Kumar Dang
- Lactation and Immuno-Physiology Laboratory, ICAR-National Dairy Research Institute, Karnal, Haryana 132001, India.
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27
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Koul A, Gemmill D, Lubna N, Meier M, Krahn N, Booy EP, Stetefeld J, Patel TR, McKenna SA. Structural and Hydrodynamic Characterization of Dimeric Human Oligoadenylate Synthetase 2. Biophys J 2020; 118:2726-2740. [PMID: 32413313 PMCID: PMC7264852 DOI: 10.1016/j.bpj.2020.04.025] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Revised: 04/15/2020] [Accepted: 04/24/2020] [Indexed: 12/20/2022] Open
Abstract
Oligoadenylate synthetases (OASs) are a family of interferon-inducible enzymes that require double-stranded RNA (dsRNA) as a cofactor. Upon binding dsRNA, OAS undergoes a conformational change and is activated to polymerize ATP into 2'-5'-oligoadenylate chains. The OAS family consists of several isozymes, with unique domain organizations to potentially interact with dsRNA of variable length, providing diversity in viral RNA recognition. In addition, oligomerization of OAS isozymes, potentially OAS1 and OAS2, is hypothesized to be important for 2'-5'-oligoadenylate chain building. In this study, we present the solution conformation of dimeric human OAS2 using an integrated approach involving small-angle x-ray scattering, analytical ultracentrifugation, and dynamic light scattering techniques. We also demonstrate OAS2 dimerization using immunoprecipitation approaches in human cells. Whereas mutation of a key active-site aspartic acid residue prevents OAS2 activity, a C-terminal mutation previously hypothesized to disrupt OAS self-association had only a minor effect on OAS2 activity. Finally, we also present the solution structure of OAS1 monomer and dimer, comparing their hydrodynamic properties with OAS2. In summary, our work presents the first, to our knowledge, dimeric structural models of OAS2 that enhance our understanding of the oligomerization and catalytic function of OAS enzymes.
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Affiliation(s)
- Amit Koul
- Department of Chemistry, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Darren Gemmill
- Alberta RNA Research and Training Institute, Department of Chemistry and Biochemistry, University of Lethbridge, Lethbridge, Alberta, Canada
| | - Nikhat Lubna
- Department of Chemistry, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Markus Meier
- Department of Chemistry, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Natalie Krahn
- Department of Molecular Biology and Biochemistry, Yale University, New Haven, Connecticut
| | - Evan P Booy
- Department of Chemistry, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Jörg Stetefeld
- Department of Chemistry, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Trushar R Patel
- Alberta RNA Research and Training Institute, Department of Chemistry and Biochemistry, University of Lethbridge, Lethbridge, Alberta, Canada; Department of Microbiology, Immunology and Infectious Disease, Cumming School of Medicine, University of Calgary, Northwest Calgary, Alberta, Canada; Li Ka Shing Institute of Virology and Discovery Lab, University of Alberta, Edmonton, Alberta, Canada.
| | - Sean A McKenna
- Department of Chemistry, University of Manitoba, Winnipeg, Manitoba, Canada; Department of Biochemistry and Medical Genetics, University of Manitoba, Winnipeg, Manitoba, Canada.
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28
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Kondratova AA, Cheon H, Dong B, Holvey-Bates EG, Hasipek M, Taran I, Gaughan C, Jha BK, Silverman RH, Stark GR. Suppressing PARylation by 2',5'-oligoadenylate synthetase 1 inhibits DNA damage-induced cell death. EMBO J 2020; 39:e101573. [PMID: 32323871 DOI: 10.15252/embj.2019101573] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 03/05/2020] [Accepted: 03/12/2020] [Indexed: 12/14/2022] Open
Abstract
High expression of 2',5'-oligoadenylate synthetase 1 (OAS1), which adds AMP residues in 2',5' linkage to a variety of substrates, is observed in many cancers as a part of the interferon-related DNA damage resistance signature (IRDS). Poly(ADP-ribose) (PAR) is rapidly synthesized from NAD+ at sites of DNA damage to facilitate repair, but excessive PAR synthesis due to extensive DNA damage results in cell death by energy depletion and/or activation of PAR-dependent programmed cell death pathways. We find that OAS1 adds AMP residues in 2',5' linkage to PAR, inhibiting its synthesis in vitro and reducing its accumulation in cells. Increased OAS1 expression substantially improves cell viability following DNA-damaging treatments that stimulate PAR synthesis during DNA repair. We conclude that high expression of OAS1 in cancer cells promotes their ability to survive DNA damage by attenuating PAR synthesis and thus preventing cell death.
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Affiliation(s)
- Anna A Kondratova
- Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA.,Department of Psychiatry, Case Western Reserve University, Cleveland, OH, USA
| | - HyeonJoo Cheon
- Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Beihua Dong
- Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Elise G Holvey-Bates
- Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Metis Hasipek
- Taussig Cancer Center, Cleveland Clinic, Cleveland, OH, USA
| | - Irina Taran
- Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Christina Gaughan
- Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Babal K Jha
- Taussig Cancer Center, Cleveland Clinic, Cleveland, OH, USA
| | - Robert H Silverman
- Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - George R Stark
- Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
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29
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Song Y, Feng N, Sanchez-Tacuba L, Yasukawa LL, Ren L, Silverman RH, Ding S, Greenberg HB. Reverse Genetics Reveals a Role of Rotavirus VP3 Phosphodiesterase Activity in Inhibiting RNase L Signaling and Contributing to Intestinal Viral Replication In Vivo. J Virol 2020; 94:e01952-19. [PMID: 32051268 PMCID: PMC7163120 DOI: 10.1128/jvi.01952-19] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Accepted: 02/07/2020] [Indexed: 12/13/2022] Open
Abstract
Our understanding of how rotavirus (RV) subverts host innate immune signaling has greatly increased over the past decade. However, the relative contribution of each virus-encoded innate immune antagonist has not been fully studied in the context of RV infection in vivo Here, we present both in vitro and in vivo evidence that the host interferon (IFN)-inducible 2'-5'-oligoadenylate synthetase (OAS) and RNase L pathway effectively suppresses the replication of heterologous RV strains. VP3 from homologous RVs relies on its 2'-5'-phosphodiesterase (PDE) domain to counteract RNase L-mediated antiviral signaling. Using an RV reverse-genetics system, we show that compared to the parental strain, VP3 PDE mutant RVs replicated at low levels in the small intestine and were shed less in the feces of wild-type mice, and such defects were rescued in Rnasel-/- suckling mice. Collectively, these findings highlight an important role of VP3 in promoting viral replication and pathogenesis in vivo in addition to its well-characterized function as the viral RNA-capping enzyme.IMPORTANCE Rotaviruses are significant human pathogens that result in diarrhea, dehydration, and deaths in many children around the world. Rotavirus vaccines have suboptimal efficacy in low- to middle-income countries, where the burden of the diseases is the most severe. With the ultimate goal of improving current vaccines, we aim to better understand how rotavirus interacts with the host innate immune system in the small intestine. Here, we demonstrate that interferon-activated RNase L signaling blocks rotavirus replication in a strain-specific manner. In addition, virus-encoded VP3 antagonizes RNase L activity both in vitro and in vivo These studies highlight an ever-evolving arms race between antiviral factors and viral pathogens and provide a new means of targeted attenuation for next-generation rotavirus vaccine design.
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Affiliation(s)
- Yanhua Song
- Department of Medicine, Division of Gastroenterology and Hepatology, Stanford University, Stanford, California, USA
- Department of Microbiology and Immunology, Stanford University, Stanford, California, USA
- Palo Alto Veterans Institute of Research, VA Palo Alto Health Care System, Palo Alto, California, USA
- Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Nanjing, China
| | - Ningguo Feng
- Department of Medicine, Division of Gastroenterology and Hepatology, Stanford University, Stanford, California, USA
- Department of Microbiology and Immunology, Stanford University, Stanford, California, USA
- Palo Alto Veterans Institute of Research, VA Palo Alto Health Care System, Palo Alto, California, USA
| | - Liliana Sanchez-Tacuba
- Department of Medicine, Division of Gastroenterology and Hepatology, Stanford University, Stanford, California, USA
- Department of Microbiology and Immunology, Stanford University, Stanford, California, USA
- Palo Alto Veterans Institute of Research, VA Palo Alto Health Care System, Palo Alto, California, USA
| | - Linda L Yasukawa
- Department of Medicine, Division of Gastroenterology and Hepatology, Stanford University, Stanford, California, USA
- Department of Microbiology and Immunology, Stanford University, Stanford, California, USA
- Palo Alto Veterans Institute of Research, VA Palo Alto Health Care System, Palo Alto, California, USA
| | - Lili Ren
- School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing, China
| | - Robert H Silverman
- Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Siyuan Ding
- Department of Molecular Microbiology, Washington University in St. Louis, St. Louis, Missouri, USA
| | - Harry B Greenberg
- Department of Medicine, Division of Gastroenterology and Hepatology, Stanford University, Stanford, California, USA
- Department of Microbiology and Immunology, Stanford University, Stanford, California, USA
- Palo Alto Veterans Institute of Research, VA Palo Alto Health Care System, Palo Alto, California, USA
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30
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Activation of RNase L in Egyptian Rousette Bat-Derived RoNi/7 Cells Is Dependent Primarily on OAS3 and Independent of MAVS Signaling. mBio 2019; 10:mBio.02414-19. [PMID: 31719180 PMCID: PMC6851283 DOI: 10.1128/mbio.02414-19] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Many RNA viruses that are highly pathogenic in humans are relatively apathogenic in their bat reservoirs, making it important to compare innate immune responses in bats to those well characterized in humans. One such antiviral response is the OAS-RNase L pathway. OASs, upon sensing dsRNA, produce 2-5A, leading to activation of RNase L which degrades viral and host RNA, limiting viral replication. Analysis of Egyptian Rousette bat sequences revealed three OAS genes expressing OAS1, OAS2, and OAS3 proteins. Interferon treatment or viral infection induces all three bat OAS mRNAs. In these bat cells as in human cells, RNase L activation and its antiviral activity are dependent primarily on OAS3 while MAVS signaling is not required. Importantly, our findings indicate the OAS-RNase L system is a primary response to virus rather than a secondary effect of interferon signaling and therefore can be activated early in infection or while interferon signaling is antagonized. Bats are reservoirs for many RNA viruses that are highly pathogenic in humans yet relatively apathogenic in the natural host. It has been suggested that differences in innate immunity are responsible. The antiviral OAS-RNase L pathway is well characterized in humans, but there is little known about its activation and antiviral activity in bats. During infection, OASs, upon sensing double-stranded RNA (dsRNA), produce 2′-5′ oligoadenylates (2-5A), leading to activation of RNase L which degrades viral and host RNA, limiting viral replication. Humans encode three active OASs (OAS1 to -3). Analysis of the Egyptian Rousette bat genome combined with mRNA sequencing from bat RoNi/7 cells revealed three homologous OAS proteins. Interferon alpha treatment or viral infection induced all three OAS mRNAs, but RNase L mRNA is constitutively expressed. Sindbis virus (SINV) or vaccinia virus (VACVΔE3L) infection of wild-type (WT) or OAS1-KO (knockout), OAS2-KO, or MAVS-KO RoNi/7 cells, but not RNase L-KO or OAS3-KO cells, induces robust RNase L activation. SINV replication is 100- to 200-fold higher in the absence of RNase L or OAS3 than in WT cells. However, MAVS-KO had no detectable effect on RNA degradation or replication. Thus, in RoNi/7 bat cells, as in human cells, activation of RNase L during infection and its antiviral activity are dependent primarily on OAS3 while MAVS signaling is not required for the activation of RNase L and restriction of infection. Our findings indicate that OAS proteins serve as pattern recognition receptors (PRRs) to recognize viral dsRNA and that this pathway is a primary response to virus rather than a secondary effect of interferon signaling.
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31
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Nogimori T, Nishiura K, Kawashima S, Nagai T, Oishi Y, Hosoda N, Imataka H, Kitamura Y, Kitade Y, Hoshino SI. Dom34 mediates targeting of exogenous RNA in the antiviral OAS/RNase L pathway. Nucleic Acids Res 2019; 47:432-449. [PMID: 30395302 PMCID: PMC6326797 DOI: 10.1093/nar/gky1087] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Accepted: 10/19/2018] [Indexed: 11/21/2022] Open
Abstract
The 2′-5′-oligoadenylate synthetase (OAS)/RNase L pathway is an innate immune system that protects hosts against pathogenic viruses and bacteria through cleavage of exogenous single-stranded RNA; however, this system's selective targeting mechanism remains unclear. Here, we identified an mRNA quality control factor Dom34 as a novel restriction factor for a positive-sense single-stranded RNA virus. Downregulation of Dom34 and RNase L increases viral replication, as well as half-life of the viral RNA. Dom34 directly binds RNase L to form a surveillance complex to recognize and eliminate the exogenous RNA in a manner dependent on translation. Interestingly, the feature detected by the surveillance complex is not the specific sequence of the viral RNA but the ‘exogenous nature’ of the RNA. We propose the following model for the selective targeting of exogenous RNA; OAS3 activated by the exogenous RNA releases 2′-5′-oligoadenylates (2–5A), which in turn converts latent RNase L to an active dimer. This accelerates formation of the Dom34-RNase L surveillance complex, and its selective localization to the ribosome on the exogenous RNA, thereby promoting degradation of the RNA. Our findings reveal that the selective targeting of exogenous RNA in antiviral defense occurs via a mechanism similar to that in the degradation of aberrant transcripts in RNA quality control.
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Affiliation(s)
- Takuto Nogimori
- Department of Biological Chemistry, Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya 467-8603, Japan
| | - Kyutatsu Nishiura
- Department of Biological Chemistry, Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya 467-8603, Japan
| | - Sho Kawashima
- Department of Biological Chemistry, Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya 467-8603, Japan
| | - Takahiro Nagai
- Department of Biological Chemistry, Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya 467-8603, Japan
| | - Yuka Oishi
- Department of Biological Chemistry, Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya 467-8603, Japan
| | - Nao Hosoda
- Department of Biological Chemistry, Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya 467-8603, Japan
| | - Hiroaki Imataka
- Department of Materials Science and Chemistry and Molecular Nanotechnology Research Center, Graduate School of Engineering, University of Hyogo, Himeji 671-2201, Japan
| | - Yoshiaki Kitamura
- Department of Biomolecular Science, Graduate School of Engineering, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Yukio Kitade
- Department of Biomolecular Science, Graduate School of Engineering, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Shin-Ichi Hoshino
- Department of Biological Chemistry, Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya 467-8603, Japan
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32
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Zika Virus Production Is Resistant to RNase L Antiviral Activity. J Virol 2019; 93:JVI.00313-19. [PMID: 31142667 DOI: 10.1128/jvi.00313-19] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Accepted: 05/24/2019] [Indexed: 12/18/2022] Open
Abstract
There is currently no knowledge of how the emerging human pathogen Zika virus (ZIKV) interacts with the antiviral endoribonuclease L (RNase L) pathway during infection. Since activation of RNase L during infection typically limits virus production dramatically, we used CRISPR-Cas9 gene editing technology to knockout (KO) targeted host genes involved in the RNase L pathway to evaluate the effects of RNase L on ZIKV infection in human A549 cells. RNase L was activated in response to ZIKV infection, which degraded ZIKV genomic RNA. Surprisingly, despite viral genome reduction, RNase L activity did not reduce ZIKV infectious titers. In contrast, both the flavivirus dengue virus and the alphavirus Sindbis virus replicated to significantly higher titers in RNase L KO cells compared to wild-type (WT) cells. Using MAVS/RNase L double KO cells, we demonstrated that the absence of increased ZIKV production in RNase L KO cells was not due to compensation by enhanced type I interferon transcripts to thus inhibit virus production. Finally, when synthetic double-stranded RNA was detected by OAS3 to induce RNase L antiviral activity prior to ZIKV infection, we observed reduced ZIKV replication factory formation, as well as a 42-fold reduction in virus yield in WT but not RNase L KO cells. This study proposes that ZIKV evades RNase L antiviral activity by generating a viral genome reservoir protected from RNase L cleavage during early infection, allowing for sufficient virus production before RNase L activation is detectable.IMPORTANCE With the onset of the 2015 ZIKV outbreak, ZIKV pathogenesis has been of extreme global public health interest, and a better understanding of interactions with the host would provide insight into molecular mechanisms driving the severe neurological outcomes of ZIKV disease. Here is the initial report on the relationship between ZIKV and the host oligoadenylate synthetase-RNase L (OAS-RNase L) system, a potent antiviral pathway effective at restricting replication of diverse viruses. Our study elucidated a unique mechanism whereby ZIKV production is impervious to antiviral RNase L activity, through a mechanism of viral RNA protection that is not mimicked during infection with numerous other RNase L-activating viruses, thus identifying a distinct replication strategy potentially important for ZIKV pathogenesis.
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Lamers MM, van den Hoogen BG, Haagmans BL. ADAR1: "Editor-in-Chief" of Cytoplasmic Innate Immunity. Front Immunol 2019; 10:1763. [PMID: 31404141 PMCID: PMC6669771 DOI: 10.3389/fimmu.2019.01763] [Citation(s) in RCA: 123] [Impact Index Per Article: 24.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Accepted: 07/11/2019] [Indexed: 12/12/2022] Open
Abstract
Specialized receptors that recognize molecular patterns such as double stranded RNA duplexes-indicative of viral replication-are potent triggers of the innate immune system. Although their activation is beneficial during viral infection, RNA transcribed from endogenous mobile genetic elements may also act as ligands potentially causing autoimmunity. Recent advances indicate that the adenosine deaminase ADAR1 through RNA editing is involved in dampening the canonical antiviral RIG-I-like receptor-, PKR-, and OAS-RNAse L pathways to prevent autoimmunity. However, this inhibitory effect must be overcome during viral infections. In this review we discuss ADAR1's critical role in balancing immune activation and self-tolerance.
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Lee WB, Choi WY, Lee DH, Shim H, Kim-Ha J, Kim YJ. OAS1 and OAS3 negatively regulate the expression of chemokines and interferon-responsive genes in human macrophages. BMB Rep 2019. [PMID: 30078389 PMCID: PMC6443328 DOI: 10.5483/bmbrep.2019.52.2.129] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Upon viral infection, the 2′, 5′-oligoadenylate synthetase (OAS)-ribonuclease L (RNaseL) system works to cleave viral RNA, thereby blocking viral replication. However, it is unclear whether OAS proteins have a role in regulating gene expression. Here, we show that OAS1 and OAS3 act as negative regulators of the expression of chemokines and interferon-responsive genes in human macrophages. Clustered regularly interspaced short palindromic repeats (CRISPR)-CRISPR-associated protein-9 nuclease (Cas9) technology was used to engineer human myeloid cell lines in which the OAS1 or OAS3 gene was deleted. Neither OAS1 nor OAS3 was exclusively responsible for the degradation of rRNA in macrophages stimulated with poly(I:C), a synthetic surrogate for viral double-stranded (ds)RNA. An mRNA sequencing analysis revealed that genes related to type I interferon signaling and chemokine activity were increased in OAS1−/− and OAS3−/− macrophages treated with intracellular poly(I:C). Indeed, retinoic-acid-inducible gene (RIG)-I- and interferon-induced helicase C domain-containing protein (IFIH1 or MDA5)-mediated induction of chemokines and interferon-stimulated genes was regulated by OAS3, but Toll-like receptor 3 (TLR3)- and TLR4-mediated induction of those genes was modulated by OAS1 in macrophages. However, stimulation of these cells with type I interferons had no effect on OAS1- or OAS3-mediated chemokine secretion. These data suggest that OAS1 and OAS3 negatively regulate the expression of chemokines and interferon-responsive genes in human macrophages.
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Affiliation(s)
- Wook-Bin Lee
- Korean Institute of Science and Technology (KIST), Gangneung Institute of Natural Products, Gangneung 25451, Korea
| | - Won Young Choi
- Department of Integrated Omics for Biomedical Science, Graduate School, Yonsei University, Seoul 03722, Korea
| | - Dong-Hyun Lee
- Department of Integrated Omics for Biomedical Science, Graduate School, Yonsei University, Seoul 03722, Korea
| | - Hyeran Shim
- Department of Integrative Bioscience and Biotechnology, College of Life Sciences, Sejong University, Seoul 05006; Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul 03722, Korea
| | - Jeongsil Kim-Ha
- Department of Integrative Bioscience and Biotechnology, College of Life Sciences, Sejong University, Seoul 05006, Korea
| | - Young-Joon Kim
- Department of Integrated Omics for Biomedical Science, Graduate School, Yonsei University, Seoul 03722; Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul 03722, Korea Korea
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OAS-RNase L innate immune pathway mediates the cytotoxicity of a DNA-demethylating drug. Proc Natl Acad Sci U S A 2019; 116:5071-5076. [PMID: 30814222 PMCID: PMC6421468 DOI: 10.1073/pnas.1815071116] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Drugs that cause epigenetic modification of DNA, such as 5-azacytidine (AZA), are used clinically to treat myelodysplastic syndromes and acute myeloid leukemia. In addition, AZA is being investigated for use against a range of different types of solid tumors, including lung and colorectal cancers. Treatment with AZA causes demethylation of DNA, thus increasing RNA synthesis, including the synthesis of double-stranded RNA, which is otherwise produced in virus-infected cells. We determined that cell death in response to AZA requires the antiviral enzyme RNase L. The results identify a drug target for enhancing the anticancer activity and reducing the toxicity of AZA and related drugs. Drugs that reverse epigenetic silencing, such as the DNA methyltransferase inhibitor (DNMTi) 5-azacytidine (AZA), have profound effects on transcription and tumor cell survival. AZA is an approved drug for myelodysplastic syndromes and acute myeloid leukemia, and is under investigation for different solid malignant tumors. AZA treatment generates self, double-stranded RNA (dsRNA), transcribed from hypomethylated repetitive elements. Self dsRNA accumulation in DNMTi-treated cells leads to type I IFN production and IFN-stimulated gene expression. Here we report that cell death in response to AZA treatment occurs through the 2′,5′-oligoadenylate synthetase (OAS)-RNase L pathway. OASs are IFN-induced enzymes that synthesize the RNase L activator 2-5A in response to dsRNA. Cells deficient in RNase L or OAS1 to 3 are highly resistant to AZA, as are wild-type cells treated with a small-molecule inhibitor of RNase L. A small-molecule inhibitor of c-Jun NH2-terminal kinases (JNKs) also antagonizes RNase L-dependent cell death in response to AZA, consistent with a role for JNK in RNase L-induced apoptosis. In contrast, the rates of AZA-induced and RNase L-dependent cell death were increased by transfection of 2-5A, by deficiencies in ADAR1 (which edits and destabilizes dsRNA), PDE12 or AKAP7 (which degrade 2-5A), or by ionizing radiation (which induces IFN-dependent signaling). Finally, OAS1 expression correlates with AZA sensitivity in the NCI-60 set of tumor cell lines, suggesting that the level of OAS1 can be a biomarker for predicting AZA sensitivity of tumor cells. These studies may eventually lead to pharmacologic strategies for regulating the antitumor activity and toxicity of AZA and related drugs.
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Intracellular RNA Sensing in Mammalian Cells: Role in Stress Response and Cancer Therapies. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2019; 344:31-89. [DOI: 10.1016/bs.ircmb.2018.08.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Secretome Screening Reveals Fibroblast Growth Factors as Novel Inhibitors of Viral Replication. J Virol 2018; 92:JVI.00260-18. [PMID: 29899088 DOI: 10.1128/jvi.00260-18] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Accepted: 06/05/2018] [Indexed: 12/17/2022] Open
Abstract
Cellular antiviral programs can efficiently inhibit viral infection. These programs are often initiated through signaling cascades induced by secreted proteins, such as type I interferons, interleukin-6 (IL-6), or tumor necrosis factor alpha (TNF-α). In the present study, we generated an arrayed library of 756 human secreted proteins to perform a secretome screen focused on the discovery of novel modulators of viral entry and/or replication. The individual secreted proteins were tested for the capacity to inhibit infection by two replication-competent recombinant vesicular stomatitis viruses (VSVs) with distinct glycoproteins utilizing different entry pathways. Fibroblast growth factor 16 (FGF16) was identified and confirmed as the most prominent novel inhibitor of both VSVs and therefore of viral replication, not entry. Importantly, an antiviral interferon signature was completely absent in FGF16-treated cells. Nevertheless, the antiviral effect of FGF16 is broad, as it was evident on multiple cell types and also on infection by coxsackievirus. In addition, other members of the FGF family also inhibited viral infection. Thus, our unbiased secretome screen revealed a novel protein family capable of inducing a cellular antiviral state. This previously unappreciated role of the FGF family may have implications for the development of new antivirals and the efficacy of oncolytic virus therapy.IMPORTANCE Viruses infect human cells in order to replicate, while human cells aim to resist infection. Several cellular antiviral programs have therefore evolved to resist infection. Knowledge of these programs is essential for the design of antiviral therapeutics in the future. The induction of antiviral programs is often initiated by secreted proteins, such as interferons. We hypothesized that other secreted proteins may also promote resistance to viral infection. Thus, we tested 756 human secreted proteins for the capacity to inhibit two pseudotypes of vesicular stomatitis virus (VSV). In this secretome screen on viral infection, we identified fibroblast growth factor 16 (FGF16) as a novel antiviral against multiple VSV pseudotypes as well as coxsackievirus. Subsequent testing of other FGF family members revealed that FGF signaling generally inhibits viral infection. This finding may lead to the development of new antivirals and may also be applicable for enhancing oncolytic virus therapy.
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Conserved Active-Site Residues Associated with OAS Enzyme Activity and Ubiquitin-Like Domains Are Not Required for the Antiviral Activity of goOASL Protein against Avian Tembusu Virus. Viruses 2018; 10:v10070371. [PMID: 30011971 PMCID: PMC6071104 DOI: 10.3390/v10070371] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 06/27/2018] [Accepted: 07/10/2018] [Indexed: 12/11/2022] Open
Abstract
Interferon (IFN)-induced 2′-5′-oligoadenylate synthetase (OAS) proteins exhibit an extensive and efficient antiviral effect against flavivirus infection in mammals and birds. Only the 2′-5′-oligoadenylate synthetase-like (OASL) gene has been identified thus far in birds, except for ostrich, which has both OAS1 and OASL genes. In this study, we first investigated the antiviral activity of goose OASL (goOASL) protein against a duck-origin Tembusu virus (DTMUV) in duck embryo fibroblast cells (DEFs). To investigate the relationship of conserved amino acids that are related to OAS enzyme activity and ubiquitin-like (UBL) domains with the antiviral activity of goOASL, a series of mutant goOASL plasmids was constructed, including goOASL-S64C/D76E/D78E/D144T, goOASL∆UBLs and goOASL∆UBLs-S64C/D76E/D78E/D144T. Interestingly, all these mutant proteins significantly inhibited the replication of DTMUV in DEFs in a dose-dependent manner. Immunofluorescence analysis showed that the goOASL, goOASL-S64C/D76E/D78E/D144T, goOASL∆UBLs and goOASL∆UBLs-S64C/D76E/D78E/D144T proteins were located not only in the cytoplasm where DTMUV replicates but also in the nucleus of DEFs. However, the goOASL and goOASL mutant proteins were mainly colocalized with DTMUV in the cytoplasm of infected cells. Our data indicated that goOASL could significantly inhibit DTMUV replication in vitro, while the active-site residues S64, D76, D78 and D144, which were associated with OAS enzyme activity, the UBL domains were not required for the antiviral activity of goOASL protein.
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Kimura S, Matsumiya T, Shiba Y, Nakanishi M, Hayakari R, Kawaguchi S, Yoshida H, Imaizumi T. The Essential Role of Double-Stranded RNA-Dependent Antiviral Signaling in the Degradation of Nonself Single-Stranded RNA in Nonimmune Cells. THE JOURNAL OF IMMUNOLOGY 2018; 201:1044-1052. [PMID: 29925678 DOI: 10.4049/jimmunol.1800456] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Accepted: 06/01/2018] [Indexed: 12/25/2022]
Abstract
The recognition of nonself dsRNA by retinoic acid-inducible gene-I (RIG-I) leads to the engagement of RIG-I-like receptor signaling. In addition, nonself dsRNA triggers a robust latent RNase (RNase L) activation and leads to the degradation of ribosomal structures and cell death. In contrast, nonself ssRNA is known to be recognized by TLR 7/8 in immune cells such as plasmacytoid dendritic cells and B cells, but little is known regarding the involvement of nonself ssRNA in antiviral signaling in nonimmune cells, including epithelial cells. Moreover, the fate of intracellular nonself ssRNA remains unknown. To address this issue, we developed a quantitative RT-PCR-based approach that monitors the kinetics of nonself ssRNA cleavage following the transfection of HeLa human cervical carcinoma cells, using model nonself ssRNA. We discovered that the degradation of ssRNA is independent of RIG-I and type I IFN signaling because ssRNA did not trigger RIG-I-mediated antiviral signaling. We also found that the kinetics of self (5'-capped) and nonself ssRNA decay were unaltered, suggesting that nonself ssRNA is not recognized by nonimmune cells. We further demonstrated that the cleavage of nonself ssRNA is accelerated when nonself dsRNA is also introduced into cells. In addition, the cleavage of nonself ssRNA is completely abolished by knockdown of RNase L. Overall, our data demonstrate the important role of dsRNA-RNase L in nonself ssRNA degradation and may partly explain the positive regulation of the antiviral responses in nonimmune cells.
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Affiliation(s)
- Sayaka Kimura
- Department of Vascular Biology, Institute of Brain Science, Hirosaki University Graduate School of Medicine, Hirosaki 036-8562, Japan; and
| | - Tomoh Matsumiya
- Department of Vascular Biology, Institute of Brain Science, Hirosaki University Graduate School of Medicine, Hirosaki 036-8562, Japan; and
| | - Yuko Shiba
- Department of Vascular Biology, Institute of Brain Science, Hirosaki University Graduate School of Medicine, Hirosaki 036-8562, Japan; and
| | - Michi Nakanishi
- Department of Vascular Biology, Institute of Brain Science, Hirosaki University Graduate School of Medicine, Hirosaki 036-8562, Japan; and
| | - Ryo Hayakari
- Department of Vascular Biology, Institute of Brain Science, Hirosaki University Graduate School of Medicine, Hirosaki 036-8562, Japan; and
| | - Shogo Kawaguchi
- Department of Gastroenterology and Hematology, Hirosaki University Graduate School of Medicine, Hirosaki 036-8562, Japan
| | - Hidemi Yoshida
- Department of Vascular Biology, Institute of Brain Science, Hirosaki University Graduate School of Medicine, Hirosaki 036-8562, Japan; and
| | - Tadaatsu Imaizumi
- Department of Vascular Biology, Institute of Brain Science, Hirosaki University Graduate School of Medicine, Hirosaki 036-8562, Japan; and
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Drappier M, Jha BK, Stone S, Elliott R, Zhang R, Vertommen D, Weiss SR, Silverman RH, Michiels T. A novel mechanism of RNase L inhibition: Theiler's virus L* protein prevents 2-5A from binding to RNase L. PLoS Pathog 2018; 14:e1006989. [PMID: 29652922 PMCID: PMC5927464 DOI: 10.1371/journal.ppat.1006989] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Revised: 04/30/2018] [Accepted: 03/23/2018] [Indexed: 11/18/2022] Open
Abstract
The OAS/RNase L pathway is one of the best-characterized effector pathways of the IFN antiviral response. It inhibits the replication of many viruses and ultimately promotes apoptosis of infected cells, contributing to the control of virus spread. However, viruses have evolved a range of escape strategies that act against different steps in the pathway. Here we unraveled a novel escape strategy involving Theiler's murine encephalomyelitis virus (TMEV) L* protein. Previously we found that L* was the first viral protein binding directly RNase L. Our current data show that L* binds the ankyrin repeats R1 and R2 of RNase L and inhibits 2'-5' oligoadenylates (2-5A) binding to RNase L. Thereby, L* prevents dimerization and oligomerization of RNase L in response to 2-5A. Using chimeric mouse hepatitis virus (MHV) expressing TMEV L*, we showed that L* efficiently inhibits RNase L in vivo. Interestingly, those data show that L* can functionally substitute for the MHV-encoded phosphodiesterase ns2, which acts upstream of L* in the OAS/RNase L pathway, by degrading 2-5A.
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Affiliation(s)
- Melissa Drappier
- Université catholique de Louvain, de Duve Institute, Brussels, Belgium
| | - Babal Kant Jha
- Translational Hematology and Oncology Research, Taussig Cancer Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Sasha Stone
- Department of Microbiology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
| | - Ruth Elliott
- Department of Microbiology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
| | - Rong Zhang
- Department of Microbiology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
| | - Didier Vertommen
- Université catholique de Louvain, de Duve Institute, Brussels, Belgium
| | - Susan R. Weiss
- Department of Microbiology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
| | - Robert H. Silverman
- Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Thomas Michiels
- Université catholique de Louvain, de Duve Institute, Brussels, Belgium
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Alex R, Ramesha KP, Singh U, Kumar S, Alyethodi RR, Deb R, Sharma S, Sengar GS, Kumar A, Prakash B. Promoter variants of OAS1 gene are associated with reproductive performance and incidence of normal calving in cattle. Theriogenology 2018; 108:255-261. [PMID: 29258042 DOI: 10.1016/j.theriogenology.2017.12.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Revised: 11/28/2017] [Accepted: 12/01/2017] [Indexed: 12/24/2022]
Abstract
2',5'-oligoadenylate synthetase (OAS) are important components of an interferon-mediated antiviral pathway. But no polymorphisms have yet been identified and associated with reproduction and reproduction traits in the bovine OAS1 gene. The objective of this study was to detect and evaluate the effects of mutations in the promoter region of bovine OAS1 gene with production and reproduction traits in cattle. Two single nuclear polymorphisms were identified, including A to T transversion (rs715937117:A>T) and A to G transition (rs480985443:A>G) and subsequently genotyped in Sahiwal and Frieswal populations. Three haplotypes were constructed including H1 (A-A), H2 (T-A) and H3 (T-G), among them H2 was the most abundant in the Sahiwal (0.677) and Frieswal (0.838) population. The analysis revealed that genotypes of promoter region had significant effect (P ≤ 0.05) on age at first breeding, age at first calving, service period and pregnancy rate. The animals with H1H2 diplotype had higher age at first breeding and age at first calving compared to H2H2 genotyped animals. Further logistic regression analysis also revealed that the probability of normal calving was found more in H2H2 diplotype, as the odds ratios of H1H2 and H2H3 in comparison to H2H2 were 0.516 and 0.486, respectively. H2H2 diplotyped animals also exhibited higher milk production also in terms of total milk yield, 300 day milk yield and peak yield. These results outlined that the bovine OAS1 gene can be used as candidate genes for simultaneous improvement of both production and reproductive performance of cattle.
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Affiliation(s)
- Rani Alex
- Animal Genetics and Breeding Section, ICAR-Central Institute for Research on Cattle, Grass Farm Road, P. O. Box 17, Meerut Cantt., Meerut 250 001, Uttar Pradesh, India.
| | - K P Ramesha
- Dairy Production, SRS, ICAR-National Dairy Research Institute, Bangalore, 560030, Karnataka, India
| | - Umesh Singh
- Animal Genetics and Breeding Section, ICAR-Central Institute for Research on Cattle, Grass Farm Road, P. O. Box 17, Meerut Cantt., Meerut 250 001, Uttar Pradesh, India
| | - Sushil Kumar
- Animal Genetics and Breeding Section, ICAR-Central Institute for Research on Cattle, Grass Farm Road, P. O. Box 17, Meerut Cantt., Meerut 250 001, Uttar Pradesh, India
| | - Rafeeque R Alyethodi
- Animal Genetics and Breeding Section, ICAR-Central Institute for Research on Cattle, Grass Farm Road, P. O. Box 17, Meerut Cantt., Meerut 250 001, Uttar Pradesh, India
| | - Rajib Deb
- Animal Genetics and Breeding Section, ICAR-Central Institute for Research on Cattle, Grass Farm Road, P. O. Box 17, Meerut Cantt., Meerut 250 001, Uttar Pradesh, India
| | - Sheetal Sharma
- Animal Genetics and Breeding Section, ICAR-Central Institute for Research on Cattle, Grass Farm Road, P. O. Box 17, Meerut Cantt., Meerut 250 001, Uttar Pradesh, India
| | - Gyanendra Singh Sengar
- Animal Genetics and Breeding Section, ICAR-Central Institute for Research on Cattle, Grass Farm Road, P. O. Box 17, Meerut Cantt., Meerut 250 001, Uttar Pradesh, India
| | - Ashish Kumar
- Animal Genetics and Breeding Section, ICAR-Central Institute for Research on Cattle, Grass Farm Road, P. O. Box 17, Meerut Cantt., Meerut 250 001, Uttar Pradesh, India
| | - B Prakash
- Animal Genetics and Breeding Section, ICAR-Central Institute for Research on Cattle, Grass Farm Road, P. O. Box 17, Meerut Cantt., Meerut 250 001, Uttar Pradesh, India
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ALEX RANI, RAMESHA KP, SINGH UMESH, KUMAR SUSHIL, ALYETHODI RAFEEQUER, DEB RAJIB, SHARMA SHEETAL, SENGAR GYANENDRAS, ASHISH ASHISH, PRAKASH B. Genomic variations in the 2'-5' oligoadenylate synthetase 1 (OAS1) gene in zebu cattle and its crossbreds of Indian origin. THE INDIAN JOURNAL OF ANIMAL SCIENCES 2017. [DOI: 10.56093/ijans.v87i11.75889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/03/2023]
Abstract
In the antiviral host defense mechanisms, the role of mammalian OAS/RNASEL pathway is very significant. These enzymes are interferon-inducible and activated by binding to double-stranded RNA (dsRNA) which are present in virus infected cells. The OAS proteins functions through its receptor, the 2-5Adependent ribonuclease (RNaseL) and activated OAS-RNaseL system degrades viral and cellular RNA and subsequently inhibits protein synthesis. Polymorphisms in the human and equine OAS gene cluster have been previously utilized for casecontrol analysis of virus-induced disease. But no polymorphisms have yet been identified in the bovine OAS1 genes for use in similar case-control studies. The promoter and coding regions of the OAS1 gene was amplified and screened for polymorphisms by PCR-SSCP and sequencing in Sahiwal and Frieswal animals. Two SNPs have been identified in the promoter region of OAS1 gene, which have predicted to create/delete sites for transcription factors. Specific amplification of the exonic regions of the OAS1 gene have identified 26 SNPs and one dinucleotide repeats, among them 14 are mis-sense variants. These polymorphisms are the first to be reported in OAS1 gene and will facilitate future case-control studies of cattle susceptibility to infectious diseases.
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Donovan J, Rath S, Kolet-Mandrikov D, Korennykh A. Rapid RNase L-driven arrest of protein synthesis in the dsRNA response without degradation of translation machinery. RNA (NEW YORK, N.Y.) 2017; 23:1660-1671. [PMID: 28808124 PMCID: PMC5648034 DOI: 10.1261/rna.062000.117] [Citation(s) in RCA: 95] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2017] [Accepted: 08/06/2017] [Indexed: 05/20/2023]
Abstract
Mammalian cells respond to double-stranded RNA (dsRNA) by activating a translation-inhibiting endoribonuclease, RNase L. Consensus in the field indicates that RNase L arrests protein synthesis by degrading ribosomal RNAs (rRNAs) and messenger RNAs (mRNAs). However, here we provide evidence for a different and far more efficient mechanism. By sequencing abundant RNA fragments generated by RNase L in human cells, we identify site-specific cleavage of two groups of noncoding RNAs: Y-RNAs, whose function is poorly understood, and cytosolic tRNAs, which are essential for translation. Quantitative analysis of human RNA cleavage versus nascent protein synthesis in lung carcinoma cells shows that RNase L stops global translation when tRNAs, as well as rRNAs and mRNAs, are still intact. Therefore, RNase L does not have to degrade the translation machinery to stop protein synthesis. Our data point to a rapid mechanism that transforms a subtle RNA cleavage into a cell-wide translation arrest.
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Affiliation(s)
- Jesse Donovan
- Department of Molecular Biology, Princeton University, Princeton, New Jersey 08544, USA
| | - Sneha Rath
- Department of Molecular Biology, Princeton University, Princeton, New Jersey 08544, USA
| | - David Kolet-Mandrikov
- Department of Molecular Biology, Princeton University, Princeton, New Jersey 08544, USA
| | - Alexei Korennykh
- Department of Molecular Biology, Princeton University, Princeton, New Jersey 08544, USA
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Pillon MC, Stanley RE. Nuclease integrated kinase super assemblies (NiKs) and their role in RNA processing. Curr Genet 2017; 64:183-190. [PMID: 28929238 DOI: 10.1007/s00294-017-0749-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Revised: 09/08/2017] [Accepted: 09/11/2017] [Indexed: 01/24/2023]
Abstract
Here we highlight the Grc3/Las1 complex, an essential RNA processing machine that is well conserved across eukaryotes and required for processing the pre-ribosomal RNA (pre-rRNA). Las1 is an endoribonuclease that cleaves the pre-rRNA while Grc3 is a polynucleotide kinase that phosphorylates the Las1-cleaved RNA product. Recently we showed that Grc3 and Las1 assemble into a higher-order complex composed of a dimer of Grc3/Las1 heterodimers that is required for nuclease and kinase activity. Unexpectedly, we found that the Grc3/Las1 complex draws numerous parallels with two other eukaryotic nucleases, Ire1 and RNase L. In this perspective we explore the similarities and differences between this family of nuclease integrated kinase super assemblies (NiKs) and their distinct roles in RNA cleavage.
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Affiliation(s)
- Monica C Pillon
- Signal Transduction Laboratory, Department of Health and Human Services, National Institute of Environmental Health Sciences, National Institutes of Health, 111 T. W. Alexander Drive, Research Triangle Park, NC, 27709, USA
| | - Robin E Stanley
- Signal Transduction Laboratory, Department of Health and Human Services, National Institute of Environmental Health Sciences, National Institutes of Health, 111 T. W. Alexander Drive, Research Triangle Park, NC, 27709, USA.
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Goto H, Kariya R, Kudo E, Okuno Y, Ueda K, Katano H, Okada S. Restoring PU.1 induces apoptosis and modulates viral transactivation via interferon-stimulated genes in primary effusion lymphoma. Oncogene 2017; 36:5252-5262. [PMID: 28481873 DOI: 10.1038/onc.2017.138] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Revised: 03/22/2017] [Accepted: 03/24/2017] [Indexed: 12/20/2022]
Abstract
Primary effusion lymphoma (PEL), which is an aggressive subgroup of B-cell lymphoma associated with Kaposi sarcoma-associated herpes virus/human herpes virus-8, is refractory to the standard treatment, and exhibits a poor survival. Although PU.1 is downregulated in PEL, the potential role of its reduction remains to be elucidated. In this investigation, we analyzed the DNA methylation of PU.1 cis-regulatory elements in PEL and the effect of restoring PU.1 on PEL cells. The mRNA level of PU.1 was downregulated in PEL cells. The methylated promoter and enhancer regions of the PU.1 gene were detected in PEL cells. Suppression of cell growth and apoptosis were caused by the restoration of PU.1 in PEL cells. A microarray analysis revealed that interferon-stimulated genes (ISGs) including pro-apoptotic ISGs were strongly increased in BCBL-1 cells after the induction of PU.1. Reporter assays showed that PU.1 transactivated pro-apoptotic ISG promoters, such as the XAF1, OAS1 and TRAIL promoters. Mutations at the PU.1 binding sequences suppressed its transactivation. We confirmed the binding of PU.1 to the XAF1, OAS1 and TRAIL promoters in a chromatin immunoprecipitation assay. PU.1 suppressed ORF57 activation by inducing IRF7. The reinduction of PU.1 reduced formation of ascites and lymphoma cell infiltration of distant organs in PEL xenograft model mice. Collectively, PU.1 has a role in tumor suppression in PEL and its down-regulation is associated with PEL development. Restoring PU.1 with demethylation agents may be a novel therapeutic approach for PEL.
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Affiliation(s)
- H Goto
- Division of Hematopoiesis, Center for AIDS Research, Kumamoto University, Honjo, Kumamoto, Japan
| | - R Kariya
- Division of Hematopoiesis, Center for AIDS Research, Kumamoto University, Honjo, Kumamoto, Japan
| | - E Kudo
- Division of Hematopoiesis, Center for AIDS Research, Kumamoto University, Honjo, Kumamoto, Japan
| | - Y Okuno
- Departments of Hematology, Rheumatology, and Infectious Disease, Kumamoto University Graduate School of Medicine, Honjo, Kumamoto, Japan
| | - K Ueda
- Division of Virology, Department of Microbiology and Immunology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - H Katano
- Department of Pathology, National Institute of Infectious Diseases, Toyama, Shinjuku, Tokyo, Japan
| | - S Okada
- Division of Hematopoiesis, Center for AIDS Research, Kumamoto University, Honjo, Kumamoto, Japan
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Tan Y, Yang T, Liu P, Chen L, Tian Q, Guo Y, He H, Liu Y, Chen Z. Association of the OAS3 rs1859330 G/A genetic polymorphism with severity of enterovirus-71 infection in Chinese Han children. Arch Virol 2017; 162:2305-2313. [PMID: 28444539 DOI: 10.1007/s00705-017-3381-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2017] [Accepted: 04/21/2017] [Indexed: 01/08/2023]
Abstract
The 2'5'-oligoadenylate synthetase (OAS) is an interferon (IFN)-induced protein that plays an important role in the antiviral action of IFN, with OAS3 being one of the four OAS classes (OAS1, OAS2, OAS3, OASL). The effect of OAS on several infectious viral diseases has been reported; however, a study of the effect of OAS3 on enterovirus 71 (EV71) is lacking. The purpose of this study was to evaluate the association of the OAS3 rs1859330 G/A genetic polymorphism with susceptibility and severity of EV71 infection. We investigated 370 Chinese Han children with hand-foot-mouth disease (HFMD) (214 of which were mild cases while 156 were severe). An improved multiplex ligation detection reaction (iMLDR) technique was carried out to examine the genotype. The AA genotype distribution (p = 0.002) and A allele frequency (OR = 1.83, 95% CI 1.32-2.52, p < 0.001) of OAS3 rs1859330 in severe cases were significantly higher than in mild cases. When comparing the different genotypes in EV71-infected patients, there were statistical differences in relation to rash (p = 0.03), oral ulcers (p = 0.005), pathologic reflex (p = 0.003), WBC counts (p = 0.032), CRP (p = 0.024), BG concentrations (p = 0.029), ALT (p = 0.02), and EEG (p = 0.019). However, there were no differences in relation to age, gender, AST, CK-MB, CT/ MRI, as well as some symptoms and signs (e.g. duration of fever (days), headache, convulsions, consciousness disturbance, paralysis, sign of meningeal irritation). In the cerebrospinal fluid (CSF) of severe cases, there were no differences in the levels of white cells, protein, glucose, chloride, lymphocytes and monocytes between the different genotypes. The plasma levels of IFN-γ in EV71-infected patients were significantly higher than in the control group (p < 0.01). IFN-γ concentrations in severe cases were lower in A allele carriers (AA+GA) (118.5 ± 12.6pg/mL) than in GG homozygotes (152.6 ± 56.3pg/mL p < 0.05). These findings suggest that the OAS3 rs1859330 G/A genetic polymorphism is associated with the severity of EV-71 infection, and that the A allele is a risk factor for the development of severe EV71 infection.
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Affiliation(s)
- Yuxia Tan
- Department of Pediatrics, The Affiliated Hospital of Qingdao University, No. 59, Haier Road, Qingdao, 266000, China
- Department of Pediatrics, Zibo City Maternal and Child Health Hospital, Zibo, 255029, Shandong, China
| | - Tingting Yang
- Department of Clinical Laboratory, The Affiliated Hospital of Qingdao University, No. 16 Jiangsu Road, Qingdao, 266003, China
| | - Peipei Liu
- Department of Pediatrics, The Affiliated Hospital of Qingdao University, No. 59, Haier Road, Qingdao, 266000, China
| | - Liping Chen
- Department of Pediatrics, Zibo City Maternal and Child Health Hospital, Zibo, 255029, Shandong, China
| | - Qingwu Tian
- Department of Clinical Laboratory, The Affiliated Hospital of Qingdao University, No. 16 Jiangsu Road, Qingdao, 266003, China
| | - Ya Guo
- Department of Pediatrics, The Affiliated Hospital of Qingdao University, No. 59, Haier Road, Qingdao, 266000, China
| | - Hongfang He
- Department of Pediatrics, The Affiliated Hospital of Qingdao University, No. 59, Haier Road, Qingdao, 266000, China
| | - Yedan Liu
- Department of Pediatrics, The Affiliated Hospital of Qingdao University, No. 59, Haier Road, Qingdao, 266000, China
| | - Zongbo Chen
- Department of Pediatrics, The Affiliated Hospital of Qingdao University, No. 59, Haier Road, Qingdao, 266000, China.
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Li Y, Banerjee S, Goldstein SA, Dong B, Gaughan C, Rath S, Donovan J, Korennykh A, Silverman RH, Weiss SR. Ribonuclease L mediates the cell-lethal phenotype of double-stranded RNA editing enzyme ADAR1 deficiency in a human cell line. eLife 2017; 6. [PMID: 28362255 PMCID: PMC5404912 DOI: 10.7554/elife.25687] [Citation(s) in RCA: 105] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Accepted: 03/30/2017] [Indexed: 12/13/2022] Open
Abstract
ADAR1 isoforms are adenosine deaminases that edit and destabilize double-stranded RNA reducing its immunostimulatory activities. Mutation of ADAR1 leads to a severe neurodevelopmental and inflammatory disease of children, Aicardi-Goutiéres syndrome. In mice, Adar1 mutations are embryonic lethal but are rescued by mutation of the Mda5 or Mavs genes, which function in IFN induction. However, the specific IFN regulated proteins responsible for the pathogenic effects of ADAR1 mutation are unknown. We show that the cell-lethal phenotype of ADAR1 deletion in human lung adenocarcinoma A549 cells is rescued by CRISPR/Cas9 mutagenesis of the RNASEL gene or by expression of the RNase L antagonist, murine coronavirus NS2 accessory protein. Our result demonstrate that ablation of RNase L activity promotes survival of ADAR1 deficient cells even in the presence of MDA5 and MAVS, suggesting that the RNase L system is the primary sensor pathway for endogenous dsRNA that leads to cell death. DOI:http://dx.doi.org/10.7554/eLife.25687.001
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Affiliation(s)
- Yize Li
- Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, United States
| | - Shuvojit Banerjee
- Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, United States
| | - Stephen A Goldstein
- Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, United States
| | - Beihua Dong
- Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, United States
| | - Christina Gaughan
- Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, United States
| | - Sneha Rath
- Department of Molecular Biology, Princeton University, Princeton, United States
| | - Jesse Donovan
- Department of Molecular Biology, Princeton University, Princeton, United States
| | - Alexei Korennykh
- Department of Molecular Biology, Princeton University, Princeton, United States
| | - Robert H Silverman
- Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, United States
| | - Susan R Weiss
- Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, United States
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Abstract
RNase L is a regulated endoribonuclease that functions in the interferon antiviral response. Activation of RNase L by 2', 5'-oligoadenylates has been linked to apoptosis, autophagy and inflammation. Genetic studies have also suggested the possible involvement of the RNase L gene (RNASEL) on chromosome 1q25.3 in several types of cancer. Here we report that ablation of RNase L in human prostate cancer PC3 cells by CRISPR/Cas9 gene editing technology enhanced cell migration as determined both by transwell assays and scratch wound healing assays. In addition, RNase L knockdown by means of RNAi increased migration of PC3 and DU145 cells in response to either fibronectin or serum stimulation, as did homozygous disruption of the RNase L gene in mouse embryonic fibroblasts. Serum or fibronectin stimulation of focal adhesion kinase (FAK) autophosphorylation on tyrosine-397 was increased by either knockdown or ablation of RNase L. In contrast, a missense mutant RNase L (R667A) lacking catalytic activity failed to suppress cell migration in PC3 cells. However, a nuclease-inactive mutant mouse RNase L (W630A) was able to partially inhibit migration of mouse fibroblasts. Consistent with a role for the catalytic activity of RNase L, transfection of PC3 cells with the RNase L activator, 2', 5'-oligoadenylate, suppressed cell migration. RNase L knockdown in PC3 cells enhanced tumor growth and metastasis following implantation in the mouse prostate. Our results suggest that naturally occurring mutations in the RNase L gene might promote enhanced cell migration and metastasis.
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Antagonism of RNase L Is Required for Murine Coronavirus Replication in Kupffer Cells and Liver Sinusoidal Endothelial Cells but Not in Hepatocytes. J Virol 2016; 90:9826-9832. [PMID: 27558415 DOI: 10.1128/jvi.01423-16] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Accepted: 08/14/2016] [Indexed: 01/08/2023] Open
Abstract
Mouse hepatitis virus strain A59 infection of mice is a useful tool for studying virus-host interaction during hepatitis development. The NS2H126R mutant is attenuated in liver replication due to loss of phosphodiesterase activity, which the wild-type (WT) virus uses to block the 2',5'-oligoadenylate synthetase (OAS)-RNase L (RNase L) antiviral pathway. The activation of RNase L by NS2H126R is cell type dependent and correlates with high basal expression levels of OAS, as found in myeloid cells. We tested the hypothesis that the resident liver macrophages, Kupffer cells (KC), represent the cell type most likely to restrict NS2H126R and prevent hepatitis. As found previously, A59 and NS2H126R replicate similarly in hepatocytes and neither activates RNase L, as assessed by an rRNA degradation assay. In contrast, in KC, A59 exhibited a 100-fold-higher titer than NS2H126R and NS2H126R induced rRNA degradation. Interestingly, in liver sinusoidal endothelial cells (LSEC), the cells that form a barrier between blood and liver parenchymal cells, NS2H126R activates RNase L, which limits viral replication. Similar growth kinetics were observed for the two viruses in KC and LSEC from RNase L-/- mice, demonstrating that both use RNase L to limit NS2H126R replication. Depletion of KC by gadolinium(III) chloride or of LSEC by cyclophosphamide partially restores liver replication of NS2H126R, leading to hepatitis. Thus, during mouse hepatitis virus (MHV) infection, hepatitis, which damages the parenchyma, is prevented by RNase L activity in both KC and LSEC but not in hepatocytes. This may be explained by the undetectable levels of RNase L as well as by the OASs expressed in hepatocytes. IMPORTANCE Mouse hepatitis virus infection of mice provides a useful tool for studying virus-host interactions during hepatitis development. The NS2H126R mutant is attenuated in liver replication due to loss of phosphodiesterase activity, by which the wild-type virus blocks the potent OAS-RNase L antiviral pathway. RNase L activation by NS2H126R is cell type dependent and correlates with high basal expression levels of OAS, as found in myeloid cells. We showed that the hepatocytes that comprise the liver parenchyma do not activate RNase L when infected with NS2H126R or restrict replication. However, both Kupffer cells (KC) (i.e., the liver-resident macrophages) and the liver sinusoidal endothelial cells (LSEC) which line the sinusoids activate RNase L in response to NS2H126R These data suggest that KC and LSEC prevent viral spread into the parenchyma, preventing hepatitis. Furthermore, hepatocytes express undetectable levels of OASs and RNase L, which likely explains the lack of RNase L activation during NS2H126R infection.
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Opposing Roles of Double-Stranded RNA Effector Pathways and Viral Defense Proteins Revealed with CRISPR-Cas9 Knockout Cell Lines and Vaccinia Virus Mutants. J Virol 2016; 90:7864-79. [PMID: 27334583 DOI: 10.1128/jvi.00869-16] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Accepted: 06/16/2016] [Indexed: 12/15/2022] Open
Abstract
UNLABELLED Vaccinia virus (VACV) decapping enzymes and cellular exoribonuclease Xrn1 catalyze successive steps in mRNA degradation and prevent double-stranded RNA (dsRNA) accumulation, whereas the viral E3 protein can bind dsRNA. We showed that dsRNA and E3 colocalized within cytoplasmic viral factories in cells infected with a decapping enzyme mutant as well as with wild-type VACV and that they coprecipitated with antibody. An E3 deletion mutant induced protein kinase R (PKR) and eukaryotic translation initiation factor alpha (eIF2α) phosphorylation earlier and more strongly than a decapping enzyme mutant even though less dsRNA was made, leading to more profound effects on viral gene expression. Human HAP1 and A549 cells were genetically modified by clustered regularly interspaced short palindromic repeat-Cas9 (CRISPR-Cas9) to determine whether the same pathways restrict E3 and decapping mutants. The E3 mutant replicated in PKR knockout (KO) HAP1 cells in which RNase L is intrinsically inactive but only with a double knockout (DKO) of PKR and RNase L in A549 cells, indicating that both pathways decreased replication equivalently and that no additional dsRNA pathway was crucial. In contrast, replication of the decapping enzyme mutant increased significantly (though less than that of wild-type virus) in DKO A549 cells but not in DKO HAP1 cells where a smaller increase in viral protein synthesis occurred. Xrn1 KO A549 cells were viable but nonpermissive for VACV; however, wild-type and mutant viruses replicated in triple-KO cells in which RNase L and PKR were also inactivated. Since KO of PKR and RNase L was sufficient to enable VACV replication in the absence of E3 or Xrn1, the poor replication of the decapping mutant, particularly in HAP1 DKO, cells indicated additional translational defects. IMPORTANCE Viruses have evolved ways of preventing or counteracting the cascade of antiviral responses that double-stranded RNA (dsRNA) triggers in host cells. We showed that the dsRNA produced in excess in cells infected with a vaccinia virus (VACV) decapping enzyme mutant and by wild-type virus colocalized with the viral E3 protein in cytoplasmic viral factories. Novel human cell lines defective in either or both protein kinase R and RNase L dsRNA effector pathways and/or the cellular 5' exonuclease Xrn1 were prepared by CRISPR-Cas9 gene editing. Inactivation of both pathways was necessary and sufficient to allow full replication of the E3 mutant and reverse the defect cause by inactivation of Xrn1, whereas the decapping enzyme mutant still exhibited defects in gene expression. The study provided new insights into functions of the VACV proteins, and the well-characterized panel of CRISPR-Cas9-modified human cell lines should have broad applicability for studying innate dsRNA pathways.
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