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Kim DH, Kim JH, Lim KB, Lee JB, Park SY, Song CS, Lee SW, Lee DH, Choi IS. Antiviral activity of adenoviral vector expressing human interferon lambda-4 against influenza virus. J Med Virol 2024; 96:e29605. [PMID: 38634474 DOI: 10.1002/jmv.29605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Revised: 03/13/2024] [Accepted: 04/04/2024] [Indexed: 04/19/2024]
Abstract
Interferon lambda (IFNλ), classified as a type III IFN, is a representative cytokine that plays an important role in innate immunity along with type I IFN. IFNλ can elicit antiviral states by inducing peculiar sets of IFN-stimulated genes (ISGs). In this study, an adenoviral vector expression system with a tetracycline operator system was used to express human IFNλ4 in cells and mice. The formation of recombinant adenovirus (rAd-huIFNλ4) was confirmed using immunohistochemistry assays and transmission electron microscopy. Its purity was verified by quantifying host cell DNA and host cell proteins, as well as by confirming the absence of the replication-competent adenovirus. The transduction of rAd-huIFNλ4 induced ISGs and inhibited four subtypes of the influenza virus in both mouse-derived (LA-4) and human-derived cells (A549). The antiviral state was confirmed in BALB/c mice following intranasal inoculation with 109 PFU of rAd-huIFNλ4, which led to the inhibition of four subtypes of the influenza virus in mouse lungs, with reduced inflammatory lesions. These results imply that human IFNλ4 could induce antiviral status by modulating ISG expression in mice.
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Affiliation(s)
- Dong-Hwi Kim
- Department of Infectious Diseases, College of Veterinary Medicine, Konkuk University, Gwangjin-gu, Seoul, Republic of Korea
| | - Jae-Hyeong Kim
- Department of Infectious Diseases, College of Veterinary Medicine, Konkuk University, Gwangjin-gu, Seoul, Republic of Korea
| | - Kyu-Beom Lim
- Department of Infectious Diseases, College of Veterinary Medicine, Konkuk University, Gwangjin-gu, Seoul, Republic of Korea
| | - Joong-Bok Lee
- Department of Infectious Diseases, College of Veterinary Medicine, Konkuk University, Gwangjin-gu, Seoul, Republic of Korea
- Konkuk University Zoonotic Diseases Research Center, Konkuk University, Gwangjin-gu, Seoul, Republic of Korea
| | - Seung-Yong Park
- Department of Infectious Diseases, College of Veterinary Medicine, Konkuk University, Gwangjin-gu, Seoul, Republic of Korea
- Konkuk University Zoonotic Diseases Research Center, Konkuk University, Gwangjin-gu, Seoul, Republic of Korea
| | - Chang-Seon Song
- Department of Infectious Diseases, College of Veterinary Medicine, Konkuk University, Gwangjin-gu, Seoul, Republic of Korea
- Konkuk University Zoonotic Diseases Research Center, Konkuk University, Gwangjin-gu, Seoul, Republic of Korea
| | - Sang-Won Lee
- Department of Infectious Diseases, College of Veterinary Medicine, Konkuk University, Gwangjin-gu, Seoul, Republic of Korea
- Konkuk University Zoonotic Diseases Research Center, Konkuk University, Gwangjin-gu, Seoul, Republic of Korea
| | - Dong-Hun Lee
- Department of Infectious Diseases, College of Veterinary Medicine, Konkuk University, Gwangjin-gu, Seoul, Republic of Korea
- Konkuk University Zoonotic Diseases Research Center, Konkuk University, Gwangjin-gu, Seoul, Republic of Korea
| | - In-Soo Choi
- Department of Infectious Diseases, College of Veterinary Medicine, Konkuk University, Gwangjin-gu, Seoul, Republic of Korea
- Konkuk University Zoonotic Diseases Research Center, Konkuk University, Gwangjin-gu, Seoul, Republic of Korea
- KU Center for Animal Blood Medical Science, Konkuk University, Gwangjin-gu, Seoul, Republic of Korea
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Salazar S, Luong KTY, Koyuncu OO. Cell Intrinsic Determinants of Alpha Herpesvirus Latency and Pathogenesis in the Nervous System. Viruses 2023; 15:2284. [PMID: 38140525 PMCID: PMC10747186 DOI: 10.3390/v15122284] [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: 10/20/2023] [Revised: 11/10/2023] [Accepted: 11/19/2023] [Indexed: 12/24/2023] Open
Abstract
Alpha herpesvirus infections (α-HVs) are widespread, affecting more than 70% of the adult human population. Typically, the infections start in the mucosal epithelia, from which the viral particles invade the axons of the peripheral nervous system. In the nuclei of the peripheral ganglia, α-HVs establish a lifelong latency and eventually undergo multiple reactivation cycles. Upon reactivation, viral progeny can move into the nerves, back out toward the periphery where they entered the organism, or they can move toward the central nervous system (CNS). This latency-reactivation cycle is remarkably well controlled by the intricate actions of the intrinsic and innate immune responses of the host, and finely counteracted by the viral proteins in an effort to co-exist in the population. If this yin-yang- or Nash-equilibrium-like balance state is broken due to immune suppression or genetic mutations in the host response factors particularly in the CNS, or the presence of other pathogenic stimuli, α-HV reactivations might lead to life-threatening pathologies. In this review, we will summarize the molecular virus-host interactions starting from mucosal epithelia infections leading to the establishment of latency in the PNS and to possible CNS invasion by α-HVs, highlighting the pathologies associated with uncontrolled virus replication in the NS.
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Affiliation(s)
| | | | - Orkide O. Koyuncu
- Department of Microbiology & Molecular Genetics, School of Medicine and Center for Virus Research, University of California, Irvine, CA 92697, USA; (S.S.); (K.T.Y.L.)
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3
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Salazar S, Luong KTY, Nua T, Koyuncu OO. Interferon-λ Activates a Differential Response in Peripheral Neurons That Is Effective against Alpha Herpesvirus Infections. Pathogens 2023; 12:1142. [PMID: 37764950 PMCID: PMC10536099 DOI: 10.3390/pathogens12091142] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2023] [Revised: 09/01/2023] [Accepted: 09/04/2023] [Indexed: 09/29/2023] Open
Abstract
Alpha herpesviruses (α-HV) infect host mucosal epithelial cells prior to establishing a life-long latent infection in the peripheral nervous system. The initial spread of viral particles from mucosa to the nervous system and the role of intrinsic immune responses at this barrier is not well understood. Using primary neurons cultured in compartmentalized chambers, prior studies performed on Pseudorabies virus (PRV) have demonstrated that type I and type II interferons (IFNs) induce a local antiviral response in axons via distinct mechanisms leading to a reduction in viral particle transport to the neuronal nucleus. A new class of interferons known as type III IFNs has been shown to play an immediate role against viral infection in mucosal epithelial cells. However, the antiviral effects of type III IFNs within neurons during α-HV infection are largely unknown. In this study, we focused on elucidating the antiviral activity of type III IFN against PRV neuronal infection, and we compared the interferon-stimulated gene (ISGs) induction pattern in neurons to non-neuronal cells. We found that IFN pre-exposure of both primary neurons and fibroblast cells significantly reduces PRV virus yield, albeit by differential STAT activation and ISG induction patterns. Notably, we observed that type III IFNs trigger the expression of a subset of ISGs mainly through STAT1 activation to induce an antiviral state in primary peripheral neurons.
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Affiliation(s)
| | | | | | - Orkide O. Koyuncu
- Department of Microbiology and Molecular Genetics, School of Medicine and Center for Virus Research, University of California, Irvine, CA 92697, USA; (S.S.); (K.T.Y.L.); (T.N.)
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4
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Choteau M, Scohy A, Messe S, Luyckx M, Dechamps M, Montiel V, Yombi JC, Gruson D, Limaye N, Michiels T, Dumoutier L. Development of SARS-CoV2 humoral response including neutralizing antibodies is not sufficient to protect patients against fatal infection. Sci Rep 2022; 12:2077. [PMID: 35136139 PMCID: PMC8827092 DOI: 10.1038/s41598-022-06038-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Accepted: 01/18/2022] [Indexed: 12/23/2022] Open
Abstract
More than a year after the start of the pandemic, COVID-19 remains a global health emergency. Although the immune response against SARS-CoV-2 has been extensively studied, some points remain controversial. One is the role of antibodies in viral clearance and modulation of disease severity. While passive transfer of neutralizing antibodies protects against SARS-CoV-2 infection in animal models, titers of anti-SARS-CoV-2 antibodies have been reported to be higher in patients suffering from more severe forms of the disease. A second key question for pandemic management and vaccine design is the persistence of the humoral response. Here, we characterized the antibody response in 187 COVID-19 patients, ranging from asymptomatic individuals to patients who died from COVID-19, and including patients who recovered. We developed in-house ELISAs to measure titers of IgG, IgM and IgA directed against the RBD or N regions in patient serum or plasma, and a spike-pseudotyped neutralization assay to analyse seroneutralization. Higher titers of virus-specific antibodies were detected in patients with severe COVID-19, including deceased patients, compared to asymptomatic patients. This demonstrates that fatal infection is not associated with defective humoral response. Finally, most of recovered patients still had anti-SARS-CoV-2 IgG more than 3 months after infection.
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Affiliation(s)
- Mathilde Choteau
- Experimental Medicine Unit, de Duve Institute, Université Catholique de Louvain, 74 Avenue Hippocrate, 1200, Brussels, Belgium
| | - Anaïs Scohy
- Department of Laboratory Medicine, Cliniques Universitaires Saint-Luc, Brussels, Belgium
- Institut de Recherche Expérimentale et Clinique (IREC), Université Catholique de Louvain, Brussels, Belgium
| | - Stéphane Messe
- Virology Unit, de Duve Institute, Université Catholique de Louvain, Brussels, Belgium
| | - Mathieu Luyckx
- Department of Gynecology-Andrology, Cliniques Universitaires Saint-Luc, Université Catholique de Louvain, Brussels, Belgium
- Tumor Infiltrating Lymphocytes Unit, de Duve Institute, Université Catholique de Louvain, Brussels, Belgium
| | - Mélanie Dechamps
- Pôle de Recherche Cardiovasculaire (CARD), Institut de Recherche Expérimentale et Clinique (IREC), Université Catholique de Louvain (UCLouvain), Brussels, Belgium
- Cardiovascular Intensive Care, Cliniques Universitaires Saint-Luc, Brussels, Belgium
| | - Virginie Montiel
- Intensive Care, Cliniques Universitaires Saint-Luc, Brussels, Belgium
- Pôle de Recherche Pharmacologie et de Thérapeutique (FATH), Institut de Recherche Expérimentale et Clinique (IREC), Université Catholique de Louvain (UCLouvain), Brussels, Belgium
| | - Jean Cyr Yombi
- Institut de Recherche Expérimentale et Clinique (IREC), Université Catholique de Louvain, Brussels, Belgium
- Department of Internal Medicine and Infectious Diseases, Cliniques Universitaires Saint-Luc, Brussels, Belgium
| | - Damien Gruson
- Department of Laboratory Medicine, Cliniques Universitaires Saint-Luc, Brussels, Belgium
- Institut de Recherche Expérimentale et Clinique (IREC), Université Catholique de Louvain, Brussels, Belgium
| | - Nisha Limaye
- Genetics of Autoimmune Diseases and Cancer, de Duve Institute, Université Catholique de Louvain, Brussels, Belgium
| | - Thomas Michiels
- Virology Unit, de Duve Institute, Université Catholique de Louvain, Brussels, Belgium
| | - Laure Dumoutier
- Experimental Medicine Unit, de Duve Institute, Université Catholique de Louvain, 74 Avenue Hippocrate, 1200, Brussels, Belgium.
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Hess NJ, Brown ME, Capitini CM. GVHD Pathogenesis, Prevention and Treatment: Lessons From Humanized Mouse Transplant Models. Front Immunol 2021; 12:723544. [PMID: 34394131 PMCID: PMC8358790 DOI: 10.3389/fimmu.2021.723544] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Accepted: 07/15/2021] [Indexed: 01/14/2023] Open
Abstract
Graft-vs-host disease (GVHD) is the most common cause of non-relapse mortality following allogeneic hematopoietic stem cell transplantation (HSCT) despite advances in conditioning regimens, HLA genotyping and immune suppression. While murine studies have yielded important insights into the cellular responses of GVHD, differences between murine and human biology has hindered the translation of novel therapies into the clinic. Recently, the field has expanded the ability to investigate primary human T cell responses through the transplantation of human T cells into immunodeficient mice. These xenogeneic HSCT models benefit from the human T cell receptors, CD4 and CD8 proteins having cross-reactivity to murine MHC in addition to several cytokines and co-stimulatory proteins. This has allowed for the direct assessment of key factors in GVHD pathogenesis to be investigated prior to entering clinical trials. In this review, we will summarize the current state of clinical GVHD research and discuss how xenogeneic HSCT models will aid in advancing the current pipeline of novel GVHD prophylaxis therapies into the clinic.
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Affiliation(s)
- Nicholas J. Hess
- Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States
| | - Matthew E. Brown
- Department of Surgery, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States
| | - Christian M. Capitini
- Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States
- University of Wisconsin Carbone Cancer Center, Madison, WI, United States
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Cesaro T, Hayashi Y, Borghese F, Vertommen D, Wavreil F, Michiels T. PKR activity modulation by phosphomimetic mutations of serine residues located three aminoacids upstream of double-stranded RNA binding motifs. Sci Rep 2021; 11:9188. [PMID: 33911136 PMCID: PMC8080564 DOI: 10.1038/s41598-021-88610-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Accepted: 04/12/2021] [Indexed: 11/28/2022] Open
Abstract
Eukaryotic translation initiation factor 2 alpha kinase 2 (EIF2AK2), better known as PKR, plays a key role in the response to viral infections and cellular homeostasis by regulating mRNA translation. Upon binding dsRNA, PKR is activated through homodimerization and subsequent autophosphorylation on residues Thr446 and Thr451. In this study, we identified a novel PKR phosphorylation site, Ser6, located 3 amino acids upstream of the first double-stranded RNA binding motif (DRBM1). Another Ser residue occurs in PKR at position 97, the very same position relative to the DRBM2. Ser or Thr residues also occur 3 amino acids upstream DRBMs of other proteins such as ADAR1 or DICER. Phosphoinhibiting mutations (Ser-to-Ala) introduced at Ser6 and Ser97 spontaneously activated PKR. In contrast, phosphomimetic mutations (Ser-to-Asp) inhibited PKR activation following either poly (I:C) transfection or virus infection. These mutations moderately affected dsRNA binding or dimerization, suggesting a model where negative charges occurring at position 6 and 97 tighten the interaction of DRBMs with the kinase domain, thus keeping PKR in an inactive closed conformation even in the presence of dsRNA. This study provides new insights on PKR regulation mechanisms and identifies Ser6 and Ser97 as potential targets to modulate PKR activity for therapeutic purposes.
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Affiliation(s)
- Teresa Cesaro
- de Duve Institute, Université Catholique de Louvain, VIRO B1.74.07, 74, Avenue Hippocrate, 1200, Brussels, Belgium
| | - Yohei Hayashi
- de Duve Institute, Université Catholique de Louvain, VIRO B1.74.07, 74, Avenue Hippocrate, 1200, Brussels, Belgium.,Frontier Sciences Unit, Department of Medical Innovations, Otsuka Pharmaceutical Co., Ltd., Tokushima, Japan
| | - Fabian Borghese
- de Duve Institute, Université Catholique de Louvain, VIRO B1.74.07, 74, Avenue Hippocrate, 1200, Brussels, Belgium
| | - Didier Vertommen
- PHOS Unit and MASSPROT Platform, de Duve Institute, Université Catholique de Louvain, Brussels, Belgium
| | - Fanny Wavreil
- de Duve Institute, Université Catholique de Louvain, VIRO B1.74.07, 74, Avenue Hippocrate, 1200, Brussels, Belgium
| | - Thomas Michiels
- de Duve Institute, Université Catholique de Louvain, VIRO B1.74.07, 74, Avenue Hippocrate, 1200, Brussels, Belgium.
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7
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Lozhkov AA, Klotchenko SA, Ramsay ES, Moshkoff HD, Moshkoff DA, Vasin AV, Salvato MS. The Key Roles of Interferon Lambda in Human Molecular Defense against Respiratory Viral Infections. Pathogens 2020; 9:pathogens9120989. [PMID: 33255985 PMCID: PMC7760417 DOI: 10.3390/pathogens9120989] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 11/23/2020] [Accepted: 11/24/2020] [Indexed: 12/18/2022] Open
Abstract
Interferons (IFN) are crucial for the innate immune response. Slightly more than two decades ago, a new type of IFN was discovered: the lambda IFN (type III IFN). Like other IFN, the type III IFN display antiviral activity against a wide variety of infections, they induce expression of antiviral, interferon-stimulated genes (MX1, OAS, IFITM1), and they have immuno-modulatory activities that shape adaptive immune responses. Unlike other IFN, the type III IFN signal through distinct receptors is limited to a few cell types, primarily mucosal epithelial cells. As a consequence of their greater and more durable production in nasal and respiratory tissues, they can determine the outcome of respiratory infections. This review is focused on the role of IFN-λ in the pathogenesis of respiratory viral infections, with influenza as a prime example. The influenza virus is a major public health problem, causing up to half a million lethal infections annually. Moreover, the virus has been the cause of four pandemics over the last century. Although IFN-λ are increasingly being tested in antiviral therapy, they can have a negative influence on epithelial tissue recovery and increase the risk of secondary bacterial infections. Therefore, IFN-λ expression deserves increased scrutiny as a key factor in the host immune response to infection.
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Affiliation(s)
- Alexey A. Lozhkov
- Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia; (A.A.L.); (D.A.M.); (A.V.V.)
- Smorodintsev Research Institute of Influenza, Russian Ministry of Health, 196376 St. Petersburg, Russia; (S.A.K.); (E.S.R.)
| | - Sergey A. Klotchenko
- Smorodintsev Research Institute of Influenza, Russian Ministry of Health, 196376 St. Petersburg, Russia; (S.A.K.); (E.S.R.)
| | - Edward S. Ramsay
- Smorodintsev Research Institute of Influenza, Russian Ministry of Health, 196376 St. Petersburg, Russia; (S.A.K.); (E.S.R.)
| | - Herman D. Moshkoff
- Russian Technological University (MIREA), 119454 Moscow, Russia;
- US Pharma Biotechnology, Inc., 5000 Thayer Center, Suite C, Oakland, MD 21550, USA
| | - Dmitry A. Moshkoff
- Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia; (A.A.L.); (D.A.M.); (A.V.V.)
- Smorodintsev Research Institute of Influenza, Russian Ministry of Health, 196376 St. Petersburg, Russia; (S.A.K.); (E.S.R.)
- US Pharma Biotechnology, Inc., 5000 Thayer Center, Suite C, Oakland, MD 21550, USA
- Global Virus Network(GVN), 725 W Lombard St, Baltimore, MD 21201, USA
| | - Andrey V. Vasin
- Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia; (A.A.L.); (D.A.M.); (A.V.V.)
- Smorodintsev Research Institute of Influenza, Russian Ministry of Health, 196376 St. Petersburg, Russia; (S.A.K.); (E.S.R.)
- Global Virus Network(GVN), 725 W Lombard St, Baltimore, MD 21201, USA
- St. Petersburg State Chemical-Pharmaceutical Academy, 197022 St. Petersburg, Russia
| | - Maria S. Salvato
- Global Virus Network(GVN), 725 W Lombard St, Baltimore, MD 21201, USA
- Institute of Human Virology, University of Maryland School of Medicine, Baltimore, MD 21201, USA
- Correspondence:
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8
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Development of reporter gene assays to determine the bioactivity of biopharmaceuticals. Biotechnol Adv 2020; 39:107466. [DOI: 10.1016/j.biotechadv.2019.107466] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 11/02/2019] [Accepted: 11/02/2019] [Indexed: 02/06/2023]
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9
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Disruption of Type III Interferon (IFN) Genes Ifnl2 and Ifnl3 Recapitulates Loss of the Type III IFN Receptor in the Mucosal Antiviral Response. J Virol 2019; 93:JVI.01073-19. [PMID: 31462571 DOI: 10.1128/jvi.01073-19] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Accepted: 08/20/2019] [Indexed: 12/13/2022] Open
Abstract
Type III interferon (IFN), or IFN lambda (IFN-λ), is an essential component of the innate immune response to mucosal viral infections. In both the intestine and the lung, signaling via the IFN-λ receptor (IFNLR) controls clinically important viral pathogens, including influenza virus, norovirus, and rotavirus. While it is thought that IFN-λ cytokines are the exclusive ligands for signaling through IFNLR, it is not known whether genetic ablation of these cytokines phenotypically recapitulates disruption of the receptor. Here, we report the serendipitous establishment of Ifnl2- / - Ifnl3- / - mice, which lack all known functional murine IFN-λ cytokines. We demonstrate that, like Ifnlr1- / - mice lacking IFNLR signaling, these mice display defective control of murine norovirus, reovirus, and influenza virus and therefore genocopy Ifnlr1- / - mice. Thus, for regulation of viral infections at mucosal sites of both the intestine and lung, signaling via IFNLR can be fully explained by the activity of known cytokines IFN-λ2 and IFN-λ3. Our results confirm the current understanding of ligand-receptor interactions for type III IFN signaling and highlight the importance of this pathway in regulation of mucosal viral pathogens.IMPORTANCE Type III interferons are potent antiviral cytokines important for regulation of viruses that infect at mucosal surfaces. Studies using mice lacking the Ifnlr1 gene encoding the type III interferon receptor have demonstrated that signaling through this receptor is critical for protection against influenza virus, norovirus, and reovirus. Using a genetic approach to disrupt murine type III interferon cytokine genes Ifnl2 and Ifnl3, we found that mice lacking these cytokines fully recapitulate the impaired control of viruses observed in mice lacking Ifnlr1 Our results support the idea of an exclusive role for known type III interferon cytokines in signaling via IFNLR to mediate antiviral effects at mucosal surfaces. These findings emphasize the importance of type III interferons in regulation of a variety of viral pathogens and provide important genetic evidence to support our understanding of the ligand-receptor interactions in this pathway.
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IFN-λ Decreases Murid Herpesvirus-4 Infection of the Olfactory Epithelium but Fails to Prevent Virus Reactivation in the Vaginal Mucosa. Viruses 2019; 11:v11080757. [PMID: 31426334 PMCID: PMC6722623 DOI: 10.3390/v11080757] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 08/13/2019] [Accepted: 08/14/2019] [Indexed: 12/14/2022] Open
Abstract
Murid herpesvirus-4 (MuHV-4), a natural gammaherpesvirus of rodents, can infect the mouse through the nasal mucosa, where it targets sustentacular cells and olfactory neurons in the olfactory epithelium before it propagates to myeloid cells and then to B cells in lymphoid tissues. After establishment of latency in B cells, viral reactivation occurs in the genital tract in 80% of female mice, which can lead to spontaneous sexual transmission to co-housed males. Interferon-lambda (IFN-λ) is a key player of the innate immune response at mucosal surfaces and is believed to limit the transmission of numerous viruses by acting on epithelial cells. We used in vivo plasmid-mediated IFN-λ expression to assess whether IFN-λ could prophylactically limit MuHV-4 infection in the olfactory and vaginal mucosae. In vitro, IFN-λ decreased MuHV-4 infection in cells that overexpressed IFN-λ receptor 1 (IFNLR1). In vivo, prophylactic IFN-λ expression decreased infection of the olfactory epithelium but did not prevent virus propagation to downstream organs, such as the spleen where the virus establishes latency. In the olfactory epithelium, sustentacular cells readily responded to IFN-λ. In contrast, olfactory neurons did not respond to IFN-λ, thus, likely allowing viral entry. In the female genital tract, columnar epithelial cells strongly responded to IFN-λ, as did most vaginal epithelial cells, although with some variation from mouse to mouse. IFN-λ expression, however, failed to prevent virus reactivation in the vaginal mucosa. In conclusion, IFN-λ decreased MuHV-4 replication in the upper respiratory epithelium, likely by protecting the sustentacular epithelial cells, but it did not protect olfactory neurons and failed to block virus reactivation in the genital mucosa.
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11
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Fusade-Boyer M, Dupré G, Bessière P, Khiar S, Quentin-Froignant C, Beck C, Lecollinet S, Rameix-Welti MA, Eléouët JF, Tangy F, Lajoie B, Bertagnoli S, Vidalain PO, Gallardo F, Volmer R. Evaluation of the Antiviral Activity of Sephin1 Treatment and Its Consequences on eIF2α Phosphorylation in Response to Viral Infections. Front Immunol 2019; 10:134. [PMID: 30809223 PMCID: PMC6379315 DOI: 10.3389/fimmu.2019.00134] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Accepted: 01/16/2019] [Indexed: 12/27/2022] Open
Abstract
The guanabenz derivative Sephin1 has recently been proposed to increase the levels of translation initiation factor 2 (eIF2α) phosphorylation by inhibiting dephosphorylation by the protein phosphatase 1-GADD34 (PPP1R15A) complex. As phosphorylation of eIF2α by protein kinase R (PKR) is a prominent cellular antiviral pathway, we evaluated the consequences of Sephin1 treatment on virus replication. Our results provide evidence that Sephin1 downregulates replication of human respiratory syncytial virus, measles virus, human adenovirus 5 virus, human enterovirus D68, human cytomegalovirus, and rabbit myxoma virus. However, Sephin1 proved to be inactive against influenza virus, as well as against Japanese encephalitis virus. Sephin1 increased the levels of phosphorylated eIF2α in cells exposed to a PKR agonist. By contrast, in virus-infected cells, the levels of phosphorylated eIF2α did not always correlate with the inhibition of virus replication by Sephin1. This work identifies Sephin1 as an antiviral molecule in cell culture against RNA, as well as DNA viruses belonging to phylogenetically distant families.
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Affiliation(s)
| | - Gabriel Dupré
- Université de Toulouse, ENVT, INRA, UMR 1225, Toulouse, France
| | - Pierre Bessière
- Université de Toulouse, ENVT, INRA, UMR 1225, Toulouse, France
| | - Samira Khiar
- Viral Genomics and Vaccination Unit, CNRS UMR-3569, Institut Pasteur, Paris, France
| | - Charlotte Quentin-Froignant
- Université de Toulouse, ENVT, INRA, UMR 1225, Toulouse, France.,NeoVirTech SAS, Institute for Advanced Life Science Technology, Toulouse, France
| | - Cécile Beck
- UMR 1161 Virology, INRA, ANSES, Ecole Nationale Vétérinaire d'Alfort, ANSES Animal Health Laboratory, EURL for Equine Diseases, Maisons-Alfort, France
| | - Sylvie Lecollinet
- UMR 1161 Virology, INRA, ANSES, Ecole Nationale Vétérinaire d'Alfort, ANSES Animal Health Laboratory, EURL for Equine Diseases, Maisons-Alfort, France
| | - Marie-Anne Rameix-Welti
- UMR INSERM U1173 2I, UFR des Sciences de la Santé Simone Veil-UVSQ, Montigny-le-Bretonneux, France.,AP-HP, Laboratoire de Microbiologie, Hôpital Ambroise Paré, Boulogne-Billancourt, France
| | - Jean-François Eléouët
- Unité de Virologie et Immunologie Moléculaires (UR892), INRA, Université Paris-Saclay, Jouy-en-Josas, France
| | - Frédéric Tangy
- Viral Genomics and Vaccination Unit, CNRS UMR-3569, Institut Pasteur, Paris, France
| | - Barbora Lajoie
- Laboratoire de Génie Chimique CNRS, INPT, UPS Université de Toulouse III, Faculté des Sciences Pharmaceutiques, Toulouse, France
| | | | - Pierre-Olivier Vidalain
- Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, Equipe Chimie & Biologie, Modélisation et Immunologie pour la Thérapie, CNRS UMR 8601, Université Paris Descartes, Paris, France
| | - Franck Gallardo
- NeoVirTech SAS, Institute for Advanced Life Science Technology, Toulouse, France
| | - Romain Volmer
- Université de Toulouse, ENVT, INRA, UMR 1225, Toulouse, France
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