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Wu L, Zheng A, Tang Y, Chai Y, Chen J, Cheng L, Hu Y, Qu J, Lei W, Liu WJ, Wu G, Zeng S, Yang H, Wang Q, Gao GF. A pan-coronavirus peptide inhibitor prevents SARS-CoV-2 infection in mice by intranasal delivery. SCIENCE CHINA. LIFE SCIENCES 2023; 66:2201-2213. [PMID: 37574525 DOI: 10.1007/s11427-023-2410-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Accepted: 07/05/2023] [Indexed: 08/15/2023]
Abstract
Coronaviruses (CoVs) have brought serious threats to humans, particularly severe acute respiratory syndrome Coronavirus 2 (SARS-CoV-2), which continually evolves into multiple variants. These variants, especially Omicron, reportedly escape therapeutic antibodies and vaccines, indicating an urgent need for new antivirals with pan-SARS-CoV-2 inhibitory activity. We previously reported that a peptide fusion inhibitor, P3, targeting heptad repeated-1 (HR1) of SARS-CoV-2 spike (S) protein, could inhibit viral infections. Here, we further designed multiple derivatives of the P3 based on structural analysis and found that one derivative, the P315V3, showed the most efficient antiviral activity against SARS-CoV-2 variants and several other sarbecoviruses, as well as other human-CoVs (HCoVs). P315V3 also exhibited effective prophylactic efficacy against the SARS-CoV-2 Delta and Omicron variants in mice via intranasal administration. These results suggest that P315V3, which is in Phase II clinical trial, is promising for further development as a nasal pan-SARS-CoV-2 or pan-CoVs inhibitor to prevent or treat CoV diseases.
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Affiliation(s)
- Lili Wu
- CAS Key Laboratory of Pathogen Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Anqi Zheng
- CAS Key Laboratory of Pathogen Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
- University of the Chinese Academy of Sciences, Beijing, 100049, China
| | - Yangming Tang
- Hybio Pharmaceutical Co., Ltd., Shenzhen, 518109, China
| | - Yan Chai
- CAS Key Laboratory of Pathogen Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Jiantao Chen
- Hybio Pharmaceutical Co., Ltd., Shenzhen, 518109, China
| | - Lin Cheng
- Institute for Hepatology, National Clinical Research Center for Infectious Disease, Shenzhen Third People's Hospital, Shenzhen, 518112, China
| | - Yu Hu
- CAS Key Laboratory of Pathogen Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
- School of Life Sciences, University of Science and Technology of China, Hefei, 230026, China
| | - Jing Qu
- Shenzhen Center for Disease Control and Prevention, Shenzhen, 518055, China
| | - Wenwen Lei
- NHC Key Laboratory of Biosafety, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China
| | - William Jun Liu
- NHC Key Laboratory of Biosafety, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China
| | - Guizhen Wu
- NHC Key Laboratory of Biosafety, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China
| | - Shaogui Zeng
- Hybio Pharmaceutical Co., Ltd., Shenzhen, 518109, China
| | - Hang Yang
- University of the Chinese Academy of Sciences, Beijing, 100049, China.
- CAS Key Laboratory of Special Pathogens and Biosafety, Center for Biosafety Mega-Science, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, 430071, China.
- Hubei Jiangxia Laboratory, Wuhan, 430299, China.
| | - Qihui Wang
- CAS Key Laboratory of Pathogen Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China.
- University of the Chinese Academy of Sciences, Beijing, 100049, China.
| | - George Fu Gao
- CAS Key Laboratory of Pathogen Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China.
- University of the Chinese Academy of Sciences, Beijing, 100049, China.
- Chinese Center for Disease Control and Prevention (China CDC), Beijing, 102206, China.
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2
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Zannella C, Chianese A, Greco G, Santella B, Squillaci G, Monti A, Doti N, Sanna G, Manzin A, Morana A, De Filippis A, D’Angelo G, Palmieri F, Franci G, Galdiero M. Design of Three Residues Peptides against SARS-CoV-2 Infection. Viruses 2022; 14:v14102103. [PMID: 36298659 PMCID: PMC9612326 DOI: 10.3390/v14102103] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 09/11/2022] [Accepted: 09/19/2022] [Indexed: 11/20/2022] Open
Abstract
The continuous and rapid spread of the COVID-19 pandemic has emphasized the need to seek new therapeutic and prophylactic treatments. Peptide inhibitors are a valid alternative approach for the treatment of emerging viral infections, mainly due to their low toxicity and high efficiency. Recently, two small nucleotide signatures were identified in the genome of some members of the Coronaviridae family and many other human pathogens. In this study, we investigated whether the corresponding amino acid sequences of such nucleotide sequences could have effects on the viral infection of two representative human coronaviruses: HCoV-OC43 and SARS-CoV-2. Our results showed that the synthetic peptides analyzed inhibit the infection of both coronaviruses in a dose-dependent manner by binding the RBD of the Spike protein, as suggested by molecular docking and validated by biochemical studies. The peptides tested do not provide toxicity on cultured cells or human erythrocytes and are resistant to human serum proteases, indicating that they may be very promising antiviral peptides.
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Affiliation(s)
- Carla Zannella
- Department of Experimental Medicine, Università degli Studi della Campania Luigi Vanvitelli, 80138 Naples, Italy
| | - Annalisa Chianese
- Department of Experimental Medicine, Università degli Studi della Campania Luigi Vanvitelli, 80138 Naples, Italy
| | - Giuseppe Greco
- Department of Experimental Medicine, Università degli Studi della Campania Luigi Vanvitelli, 80138 Naples, Italy
| | - Biagio Santella
- Department of Experimental Medicine, Università degli Studi della Campania Luigi Vanvitelli, 80138 Naples, Italy
| | - Giuseppe Squillaci
- Research Institute on Terrestrial Ecosystems, National Research Council (CNR), Via Pietro Castellino 111, 80131 Naples, Italy
| | - Alessandra Monti
- Institute of Biostructures and Bioimaging (IBB), National Research Council (CNR), 80134 Naples, Italy
| | - Nunzianna Doti
- Institute of Biostructures and Bioimaging (IBB), National Research Council (CNR), 80134 Naples, Italy
| | - Giuseppina Sanna
- Department of Biomedical Sciences, University of Cagliari, Cittadella Universitaria, 09042 Cagliari, Italy
| | - Aldo Manzin
- Department of Biomedical Sciences, University of Cagliari, Cittadella Universitaria, 09042 Cagliari, Italy
| | - Alessandra Morana
- Research Institute on Terrestrial Ecosystems, National Research Council (CNR), Via Pietro Castellino 111, 80131 Naples, Italy
| | - Anna De Filippis
- Department of Experimental Medicine, Università degli Studi della Campania Luigi Vanvitelli, 80138 Naples, Italy
| | - Gianni D’Angelo
- Department of Computer Science, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy
| | - Francesco Palmieri
- Department of Computer Science, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy
| | - Gianluigi Franci
- Department of Medicine, Surgery and Dentistry, “Scuola Medica Salernitana”, University of Salerno, 84081 Baronissi, Italy
- Correspondence:
| | - Massimiliano Galdiero
- Department of Experimental Medicine, Università degli Studi della Campania Luigi Vanvitelli, 80138 Naples, Italy
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Identification and characterization of coiled-coil motifs across Autographa californica multiple nucleopolyhedrovirus genome. Heliyon 2022; 8:e10588. [PMID: 36132175 PMCID: PMC9483598 DOI: 10.1016/j.heliyon.2022.e10588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 05/15/2022] [Accepted: 09/05/2022] [Indexed: 12/02/2022] Open
Abstract
Coiled coils (CCs) are protein structural motifs universally found in proteins and mediate a plethora of biological interactions, and thus their reliable annotation is crucial for studies of protein structure and function. Autographa californica multiple nucleopolyhedrovirus (AcMNPV) is a large double-stranded DNA (dsDNA) virus and encodes 154 proteins. In this study, genome-wide scans of previously uncharacterized CC motifs throughout AcMNPV was conducted using CC prediction software. In total, 24 CC motifs in 19 CC proteins with high confidence were identified. The characteristic of viral CC motifs were analyzed. The CC proteins could be divided into 12 viral structural proteins and 7 non-structural proteins, including viral membrane fusion proteins, enzymes, and transcription factors. Moreover, CC motifs are conserved in the baculoviral orthologs of 14 of the 19 proteins. It is noted that five CC proteins, including Ac51, Ac66, Exon0, Ac13, and GP16, were previously identified to function in the nuclear egress of nucleocapsids, and Ac66 contains multiple CC motifs, the longest of which comprises 252 amino acids, suggesting a role of CC motifs in this process. Taken together, the CC motifs identified in this study are valuable resource for studying protein function and protein interaction networks during virus replication.
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Inhibition of calcium-triggered secretion by hydrocarbon-stapled peptides. Nature 2022; 603:949-956. [PMID: 35322233 PMCID: PMC8967716 DOI: 10.1038/s41586-022-04543-1] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Accepted: 02/11/2022] [Indexed: 02/06/2023]
Abstract
Membrane fusion triggered by Ca2+ is orchestrated by a conserved set of proteins to mediate synaptic neurotransmitter release, mucin secretion and other regulated exocytic processes1–4. For neurotransmitter release, the Ca2+ sensitivity is introduced by interactions between the Ca2+ sensor synaptotagmin and the SNARE complex5, and sequence conservation and functional studies suggest that this mechanism is also conserved for mucin secretion6. Disruption of Ca2+-triggered membrane fusion by a pharmacological agent would have therapeutic value for mucus hypersecretion as it is the major cause of airway obstruction in the pathophysiology of respiratory viral infection, asthma, chronic obstructive pulmonary disease and cystic fibrosis7–11. Here we designed a hydrocarbon-stapled peptide that specifically disrupts Ca2+-triggered membrane fusion by interfering with the so-called primary interface between the neuronal SNARE complex and the Ca2+-binding C2B domain of synaptotagmin-1. In reconstituted systems with these neuronal synaptic proteins or with their airway homologues syntaxin-3, SNAP-23, VAMP8, synaptotagmin-2, along with Munc13-2 and Munc18-2, the stapled peptide strongly suppressed Ca2+-triggered fusion at physiological Ca2+ concentrations. Conjugation of cell-penetrating peptides to the stapled peptide resulted in efficient delivery into cultured human airway epithelial cells and mouse airway epithelium, where it markedly and specifically reduced stimulated mucin secretion in both systems, and substantially attenuated mucus occlusion of mouse airways. Taken together, peptides that disrupt Ca2+-triggered membrane fusion may enable the therapeutic modulation of mucin secretory pathways. Peptides that disrupt Ca2+-triggered membrane fusion may enable the therapeutic modulation of mucin secretory pathways.
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5
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Ebola Virus Entry Inhibitors. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2022; 1366:155-170. [DOI: 10.1007/978-981-16-8702-0_10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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6
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Cross-Neutralisation of Novel Bombali Virus by Ebola Virus Antibodies and Convalescent Plasma Using an Optimised Pseudotype-Based Neutralisation Assay. Trop Med Infect Dis 2021; 6:tropicalmed6030155. [PMID: 34449756 PMCID: PMC8412100 DOI: 10.3390/tropicalmed6030155] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 08/20/2021] [Accepted: 08/21/2021] [Indexed: 11/17/2022] Open
Abstract
Ebolaviruses continue to pose a significant outbreak threat, and while Ebola virus (EBOV)-specific vaccines and antivirals have been licensed, efforts to develop candidates offering broad species cross-protection are continuing. The use of pseudotyped virus in place of live virus is recognised as an alternative, safer, high-throughput platform to evaluate anti-ebolavirus antibodies towards their development, yet it requires optimisation. Here, we have shown that the target cell line impacts neutralisation assay results and cannot be selected purely based on permissiveness. In expanding the platform to incorporate each of the ebolavirus species envelope glycoprotein, allowing a comprehensive assessment of cross-neutralisation, we found that the recently discovered Bombali virus has a point mutation in the receptor-binding domain which prevents entry into a hamster cell line and, importantly, shows that this virus can be cross-neutralised by EBOV antibodies and convalescent plasma.
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Pu J, Zhou JT, Liu P, Yu F, He X, Lu L, Jiang S. Viral Entry Inhibitors Targeting Six-Helical Bundle Core Against Highly Pathogenic Enveloped Viruses with Class I Fusion Proteins. Curr Med Chem 2021; 29:700-718. [PMID: 33992055 DOI: 10.2174/0929867328666210511015808] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 02/12/2021] [Accepted: 02/13/2021] [Indexed: 11/22/2022]
Abstract
TypeⅠ enveloped viruses bind to cell receptors through surface glycoproteins to initiate infection or undergo receptor-mediated endocytosis. They also initiate membrane fusion in the acidic environment of endocytic compartments, releasing genetic material into the cell. In the process of membrane fusion, envelope protein exposes fusion peptide, followed by insertion into the cell membrane or endosomal membrane. Further conformational changes ensue in which the type 1 envelope protein forms a typical six-helix bundle structure, shortening the distance between viral and cell membranes so that fusion can occur. Entry inhibitors targeting viral envelope proteins, or host factors, are effective antiviral agents and have been widely studied. Some have been used clinically, such as T20 and Maraviroc for human immunodeficiency virus 1 (HIV-1) or Myrcludex B for hepatitis D virus (HDV). This review focuses on entry inhibitors that target the six-helical bundle core against highly pathogenic enveloped viruses with class I fusion proteins, including retroviruses, coronaviruses, influenza A viruses, paramyxoviruses, and filoviruses.
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Affiliation(s)
- Jing Pu
- Key Laboratory of Medical Molecular Virology of MOE/MOH/CAMS, School of Basic Medical Sciences & Shanghai Public Health Clinical Center, Fudan University, Shanghai 200032, China
| | - Joey Tianyi Zhou
- Institute of High Performance Computing, The Agency for Science, Technology and Research, Singapore
| | - Ping Liu
- Institute of High Performance Computing, The Agency for Science, Technology and Research, Singapore
| | - Fei Yu
- College of Life Sciences, Hebei Agricultural University, Baoding, China
| | - Xiaoyang He
- Beijing Institute of Radiation Medicine, Beijing, China
| | - Lu Lu
- Key Laboratory of Medical Molecular Virology of MOE/MOH/CAMS, School of Basic Medical Sciences & Shanghai Public Health Clinical Center, Fudan University, Shanghai 200032, China
| | - Shibo Jiang
- Key Laboratory of Medical Molecular Virology of MOE/MOH/CAMS, School of Basic Medical Sciences & Shanghai Public Health Clinical Center, Fudan University, Shanghai 200032, China
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8
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Ashaolu TJ, Nawaz A, Walayat N, Khalifa I. Potential "biopeptidal" therapeutics for severe respiratory syndrome coronaviruses: a review of antiviral peptides, viral mechanisms, and prospective needs. Appl Microbiol Biotechnol 2021; 105:3457-3470. [PMID: 33876282 PMCID: PMC8054851 DOI: 10.1007/s00253-021-11267-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 03/25/2021] [Accepted: 04/04/2021] [Indexed: 01/10/2023]
Abstract
Although great advances have been made on large-scale manufacturing of vaccines and antiviral-based drugs, viruses persist as the major cause of human diseases nowadays. The recent pandemic of coronavirus disease-2019 (COVID-19) mounts a lot of stress on the healthcare sector and the scientific society to search continuously for novel components with antiviral possibility. Herein, we narrated the different tactics of using biopeptides as antiviral molecules that could be used as an interesting alternative to treat COVID-19 patients. The number of peptides with antiviral effects is still low, but such peptides already displayed huge potentials to become pharmaceutically obtainable as antiviral medications. Studies showed that animal venoms, mammals, plant, and artificial sources are the main sources of antiviral peptides, when bioinformatics tools are used. This review spotlights bioactive peptides with antiviral activities against human viruses, especially the coronaviruses such as severe acute respiratory syndrome (SARS) virus, Middle East respiratory syndrome (MERS) virus, and severe acute respiratory syndrome coronavirus 2 (SARS-COV-2 or SARS-nCOV19). We also showed the data about well-recognized peptides that are still under investigations, while presenting the most potent ones that may become medications for clinical use.
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Affiliation(s)
- Tolulope Joshua Ashaolu
- Institute of Research and Development, Duy Tan University, Da Nang, 550000 Vietnam
- Faculty of Environmental and Chemical Engineering, Duy Tan University, Da Nang, 550000 Vietnam
| | - Asad Nawaz
- Jiangsu Key Laboratory of Crop Genetics and Physiology, Key Laboratory of Plant Functional Genomics of the Ministry of Education, College of Agriculture, Yangzhou University, Yangzhou, People’s Republic of China
| | - Noman Walayat
- Department of Food Science and Engineering, College of Ocean, Zhejiang University of Technology, Hangzhou, People’s Republic of China
| | - Ibrahim Khalifa
- Food Technology Department, Faculty of Agriculture, Banha University, 13736, Moshtohor, Cairo, Egypt
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9
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Wang LL, Palermo N, Estrada L, Thompson C, Patten JJ, Anantpadma M, Davey RA, Xiang SH. Identification of filovirus entry inhibitors targeting the endosomal receptor NPC1 binding site. Antiviral Res 2021; 189:105059. [PMID: 33705865 DOI: 10.1016/j.antiviral.2021.105059] [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] [Received: 12/03/2020] [Revised: 02/27/2021] [Accepted: 03/04/2021] [Indexed: 12/20/2022]
Abstract
Filoviruses, mainly consisting of Ebola viruses (EBOV) and Marburg viruses (MARV), are enveloped negative-strand RNA viruses which can infect humans to cause severe hemorrhagic fevers and outbreaks with high mortality rates. The filovirus infection is mediated by the interaction of viral envelope glycoprotein (GP) and the human endosomal receptor Niemann-Pick C1 (NPC1). Blocking this interaction will prevent the infection. Therefore, we utilized an In silico screening approach to conduct virtual compound screening against the NPC1 receptor-binding site (RBS). Twenty-six top-hit compounds were purchased and evaluated by in vitro cell based inhibition assays against pseudotyped or replication-competent filoviruses. Two classes (A and U) of compounds were identified to have potent inhibitory activity against both Ebola and Marburg viruses. The IC50 values are in the lower level of micromolar concentrations. One compound (compd-A) was found to have a sub-micromolar IC50 value (0.86 μM) against pseudotyped Marburg virus. The cytotoxicity assay (MTT) indicates that compd-A has a moderate cytotoxicity level but the compd-U has much less toxicity and the CC50 value was about 100 μM. Structure-activity relationship (SAR) study has found some analogs of compd-A and -U have reduced the toxicity and enhanced the inhibitory activity. In conclusion, this work has identified several qualified lead-compounds for further drug development against filovirus infection.
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Affiliation(s)
- Leah Liu Wang
- School of Veterinary Medicine and Biomedical Sciences, University of Nebraska-Lincoln, Lincoln, NE, 68583, USA; Nebraska Center for Virology, University of Nebraska-Lincoln, Lincoln, NE, 68583, USA
| | - Nicholas Palermo
- Computational Chemistry Core Facility, VCR Cores, University of Nebraska Medical Center, Omaha, NE, 68198, USA
| | - Leslie Estrada
- Nebraska Center for Virology, University of Nebraska-Lincoln, Lincoln, NE, 68583, USA
| | - Colton Thompson
- Nebraska Center for Virology, University of Nebraska-Lincoln, Lincoln, NE, 68583, USA
| | - J J Patten
- National Emerging Infectious Diseases Laboratories, Boston University, Boston, MA, 0211, USA
| | - Manu Anantpadma
- National Emerging Infectious Diseases Laboratories, Boston University, Boston, MA, 0211, USA
| | - Robert A Davey
- National Emerging Infectious Diseases Laboratories, Boston University, Boston, MA, 0211, USA
| | - Shi-Hua Xiang
- School of Veterinary Medicine and Biomedical Sciences, University of Nebraska-Lincoln, Lincoln, NE, 68583, USA; Nebraska Center for Virology, University of Nebraska-Lincoln, Lincoln, NE, 68583, USA.
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10
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Zhang Q, Liang T, Nandakumar KS, Liu S. Emerging and state of the art hemagglutinin-targeted influenza virus inhibitors. Expert Opin Pharmacother 2020; 22:715-728. [PMID: 33327812 DOI: 10.1080/14656566.2020.1856814] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Introduction: Seasonal influenza vaccination, together with FDA-approved neuraminidase (NA) and polymerase acidic (PA) inhibitors, is the most effective way for prophylaxis and treatment of influenza infections. However, the low efficacy of prevailing vaccines to newly emerging influenza strains and increasing resistance to available drugs drives intense research to explore more effective inhibitors. Hemagglutinin (HA), one of the major surface proteins of influenza strains, represents an attractive therapeutic target to develop such new inhibitors.Areas covered: This review summarizes the current progress of HA-based influenza virus inhibitors and their mechanisms of action, which may facilitate further research in developing novel antiviral inhibitors for controlling influenza infections.Expert opinion: HA-mediated entry of influenza virus is an essential step for successful infection of the host, which makes HA a promising target for the development of antiviral drugs. Recent progress in delineating the crystal structures of HA, especially HA-inhibitors complexes, has revealed a number of key residues and conserved binding pockets within HA. This has opened up important insights for developing HA-based antiviral inhibitors that have a high resistance barrier and broad-spectrum activities.
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Affiliation(s)
- Qiao Zhang
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, P. R. China
| | - Taizhen Liang
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, P. R. China
| | - Kutty Selva Nandakumar
- Southern Medical University-Karolinska Institute United Medical Inflammation Center, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, P.R. China
| | - Shuwen Liu
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, P. R. China.,State Key Laboratory of Organ Failure Research, Institute of Kidney Disease of Guangdong, Southern Medical University, Guangzhou, P. R. China
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11
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Schütz D, Ruiz-Blanco YB, Münch J, Kirchhoff F, Sanchez-Garcia E, Müller JA. Peptide and peptide-based inhibitors of SARS-CoV-2 entry. Adv Drug Deliv Rev 2020; 167:47-65. [PMID: 33189768 PMCID: PMC7665879 DOI: 10.1016/j.addr.2020.11.007] [Citation(s) in RCA: 112] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 11/08/2020] [Accepted: 11/10/2020] [Indexed: 12/18/2022]
Abstract
To date, no effective vaccines or therapies are available against the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the causative pandemic agent of the coronavirus disease 2019 (COVID-19). Due to their safety, efficacy and specificity, peptide inhibitors hold great promise for the treatment of newly emerging viral pathogens. Based on the known structures of viral proteins and their cellular targets, antiviral peptides can be rationally designed and optimized. The resulting peptides may be highly specific for their respective targets and particular viral pathogens or exert broad antiviral activity. Here, we summarize the current status of peptides inhibiting SARS-CoV-2 entry and outline the strategies used to design peptides targeting the ACE2 receptor or the viral spike protein and its activating proteases furin, transmembrane serine protease 2 (TMPRSS2), or cathepsin L. In addition, we present approaches used against related viruses such as SARS-CoV-1 that might be implemented for inhibition of SARS-CoV-2 infection.
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Affiliation(s)
- Desiree Schütz
- Institute of Molecular Virology, Ulm University Medical Center, 89081 Ulm, Germany
| | - Yasser B Ruiz-Blanco
- Computational Biochemistry, Center of Medical Biotechnology, University of Duisburg-Essen, 45117 Essen, Germany
| | - Jan Münch
- Institute of Molecular Virology, Ulm University Medical Center, 89081 Ulm, Germany
| | - Frank Kirchhoff
- Institute of Molecular Virology, Ulm University Medical Center, 89081 Ulm, Germany
| | - Elsa Sanchez-Garcia
- Computational Biochemistry, Center of Medical Biotechnology, University of Duisburg-Essen, 45117 Essen, Germany.
| | - Janis A Müller
- Institute of Molecular Virology, Ulm University Medical Center, 89081 Ulm, Germany.
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12
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Mangion M, Gélinas JF, Bakhshi Zadeh Gashti A, Azizi H, Kiesslich S, Nassoury N, Chahal PS, Kobinger G, Gilbert R, Garnier A, Gaillet B, Kamen A. Evaluation of novel HIV vaccine candidates using recombinant vesicular stomatitis virus vector produced in serum-free Vero cell cultures. Vaccine 2020; 38:7949-7955. [PMID: 33139138 DOI: 10.1016/j.vaccine.2020.10.058] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 10/09/2020] [Accepted: 10/18/2020] [Indexed: 12/20/2022]
Abstract
Acquired Immune Deficiency Syndrome (AIDS) in humans is a result of the destruction of the immune system caused by Human Immunodeficiency Virus (HIV) infection. This serious epidemic is still progressing world-wide. Despite advances in treatment, a safe and effective preventive HIV vaccine is desired to combat this disease, and to save millions of lives. However, such a vaccine is not available yet although extensive amounts of resources in research and development have been invested over three decades. In light of the recently approved Ebola virus disease vaccine based on a recombinant vesicular stomatitis virus (rVSV-ZEBOV), we present the results of our work on three novel VSV-vectored HIV vaccine candidates. We describe the design, rescue, production and purification method and evaluate their immunogenicity in mice prior to preclinical studies that will be performed in non-human primates. The production of each of the three candidate vaccines (rVSV-B6-NL4.3Env/SIVtm, rVSV-B6-NL4.3Env/Ebtm and rVSV-B6-A74Env(PN6)/SIVtm) was evaluated in small scale in Vero cells and it was found that production kinetics on Vero cells vary depending on the HIV gp surface protein used. Purified virus preparations complied with the WHO restrictions for the residual DNA and host cell protein contents. Finally, when administered to mice, all three rVSV-HIV vaccine candidates induced an HIV gp140-specific antibody response.
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Affiliation(s)
- Mathias Mangion
- Département de génie chimique, Université Laval, Québec, QC, Canada
| | | | | | - Hiva Azizi
- Centre de Recherche en Infectiologie, Centre Hospitalier Universitaire de Québec, Université Laval, Quebec, QC, Canada
| | - Sascha Kiesslich
- Department of Bioengineering, McGill University, Montreal, QC, Canada
| | - Nasha Nassoury
- Human Health Therapeutics, National Research Council Canada, Montreal, QC, Canada
| | - Parminder S Chahal
- Human Health Therapeutics, National Research Council Canada, Montreal, QC, Canada
| | - Gary Kobinger
- Centre de Recherche en Infectiologie, Centre Hospitalier Universitaire de Québec, Université Laval, Quebec, QC, Canada
| | - Rénald Gilbert
- Human Health Therapeutics, National Research Council Canada, Montreal, QC, Canada
| | - Alain Garnier
- Département de génie chimique, Université Laval, Québec, QC, Canada
| | - Bruno Gaillet
- Département de génie chimique, Université Laval, Québec, QC, Canada
| | - Amine Kamen
- Department of Bioengineering, McGill University, Montreal, QC, Canada.
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Barfoot S, Poger D, Mark AE. Understanding the Activated Form of a Class-I Fusion Protein: Modeling the Interaction of the Ebola Virus Glycoprotein 2 with a Lipid Bilayer. Biochemistry 2020; 59:4051-4058. [PMID: 32960042 DOI: 10.1021/acs.biochem.0c00527] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The fusion of the viral and target cell membranes is a key step in the life cycle of all enveloped viruses. Here, a range of structural data is used to generate an evidence-based model of the active conformation of an archetypical type-I fusion protein, the Ebola glycoprotein 2 (GP2). The stability of the trimeric complex is demonstrated using molecular dynamics and validated by simulating the interaction of the complex with a lipid bilayer. In this model, the fusion peptides project away from the central helix bundle parallel to the target membrane. This maximizes contact with the host membrane, enhances lateral stability, and would explain why, when activated, viral fusion proteins are trimeric.
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Affiliation(s)
- Shelley Barfoot
- School of Chemistry & Molecular Biosciences, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - David Poger
- School of Chemistry & Molecular Biosciences, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - Alan E Mark
- School of Chemistry & Molecular Biosciences, The University of Queensland, St Lucia, Queensland 4072, Australia
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14
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Krishna G, Pillai VS, Veettil MV. Approaches and advances in the development of potential therapeutic targets and antiviral agents for the management of SARS-CoV-2 infection. Eur J Pharmacol 2020; 885:173450. [PMID: 32739174 PMCID: PMC7834013 DOI: 10.1016/j.ejphar.2020.173450] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 07/24/2020] [Accepted: 07/29/2020] [Indexed: 12/16/2022]
Abstract
Virus onslaughts continue to spread fear and cause rampage across the world every now and then. The twenty first century is yet again witnessing a gross global pandemic, Coronavirus Disease 2019 (COVID-19) caused by Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2). Globally no vaccines or drug specific to COVID-19 is available. Corona viruses have been in mutual relationship with humans and other hosts over many decades though aggressive zoonotic strains have caused havoc. Zoonotic emergent corona viruses prior to SARS-COV-2 included severe acute respiratory syndrome coronavirus (SARS-CoV) and Middle East respiratory syndrome coronavirus (MERS-CoV), with the former leading to aggressive infectious spread and the later with high mortality rate. Although they emerged in the early period of the twenty first century, resilient biomedical and expertise in pharmaceutical domain could not appropriate any proprietary therapeutics. Studies envisaged towards curtailing their spread employed different stages of the virus life cycle with all zoonotic coronaviruses (CoVs) sharing genomic and structural similarities. Hence the strategies against SARS-CoV and MERS-CoV could prove effective against the recent outbreak of SAR-CoV-2. The review unravels key events involved in the lifecycle of SARS-CoV-2 while highlighting the possible avenues of therapy. The review also holds the scope in better understanding a broad-spectrum antivirals, monoclonal antibodies and small molecule inhibitors against viral glycoproteins, host cell receptor, viral mRNA synthesis, RNA-dependent RNA polymerase (RdRp) and viral proteases in order to design and develop antiviral drugs for SARS-CoV-2.
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15
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Villa TG, Abril AG, Sánchez S, de Miguel T, Sánchez-Pérez A. Animal and human RNA viruses: genetic variability and ability to overcome vaccines. Arch Microbiol 2020; 203:443-464. [PMID: 32989475 PMCID: PMC7521576 DOI: 10.1007/s00203-020-02040-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2020] [Revised: 06/29/2020] [Accepted: 09/12/2020] [Indexed: 02/06/2023]
Abstract
RNA viruses, in general, exhibit high mutation rates; this is mainly due to the low fidelity displayed by the RNA-dependent polymerases required for their replication that lack the proofreading machinery to correct misincorporated nucleotides and produce high mutation rates. This lack of replication fidelity, together with the fact that RNA viruses can undergo spontaneous mutations, results in genetic variants displaying different viral morphogenesis, as well as variation on their surface glycoproteins that affect viral antigenicity. This diverse viral population, routinely containing a variety of mutants, is known as a viral ‘quasispecies’. The mutability of their virions allows for fast evolution of RNA viruses that develop antiviral resistance and overcome vaccines much more rapidly than DNA viruses. This also translates into the fact that pathogenic RNA viruses, that cause many diseases and deaths in humans, represent the major viral group involved in zoonotic disease transmission, and are responsible for worldwide pandemics.
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Affiliation(s)
- T G Villa
- Department of Microbiology, Faculty of Pharmacy, University of Santiago de Compostela, 5706, Santiago de Compostela, Spain.
| | - Ana G Abril
- Department of Microbiology, Faculty of Pharmacy, University of Santiago de Compostela, 5706, Santiago de Compostela, Spain
| | - S Sánchez
- Department of Microbiology, Faculty of Pharmacy, University of Santiago de Compostela, 5706, Santiago de Compostela, Spain
| | - T de Miguel
- Department of Microbiology, Faculty of Pharmacy, University of Santiago de Compostela, 5706, Santiago de Compostela, Spain
| | - A Sánchez-Pérez
- Sydney School of Veterinary Science, Faculty of Science, University of Sydney, Sydney, NSW, 2006, Australia
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16
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Khavinson V, Linkova N, Dyatlova A, Kuznik B, Umnov R. Peptides: Prospects for Use in the Treatment of COVID-19. Molecules 2020; 25:E4389. [PMID: 32987757 PMCID: PMC7583759 DOI: 10.3390/molecules25194389] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Revised: 09/18/2020] [Accepted: 09/21/2020] [Indexed: 01/08/2023] Open
Abstract
There is a vast practice of using antimalarial drugs, RAS inhibitors, serine protease inhibitors, inhibitors of the RNA-dependent RNA polymerase of the virus and immunosuppressants for the treatment of the severe form of COVID-19, which often occurs in patients with chronic diseases and older persons. Currently, the clinical efficacy of these drugs for COVID-19 has not been proven yet. Side effects of antimalarial drugs can worsen the condition of patients and increase the likelihood of death. Peptides, given their physiological mechanism of action, have virtually no side effects. Many of them are geroprotectors and can be used in patients with chronic diseases. Peptides may be able to prevent the development of the pathological process during COVID-19 by inhibiting SARS-CoV-2 virus proteins, thereby having immuno- and bronchoprotective effects on lung cells, and normalizing the state of the hemostasis system. Immunomodulators (RKDVY, EW, KE, AEDG), possessing a physiological mechanism of action at low concentrations, appear to be the most promising group among the peptides. They normalize the cytokines' synthesis and have an anti-inflammatory effect, thereby preventing the development of disseminated intravascular coagulation, acute respiratory distress syndrome and multiple organ failure.
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Affiliation(s)
- Vladimir Khavinson
- Department of Biogerontology, Saint Petersburg Institute of Bioregulation and Gerontology, 197110 Saint Petersburg, Russia; (V.K.); (A.D.); (R.U.)
- The Group of Peptide Regulation of Aging, Pavlov Institute of Physiology of RAS, 199034 St. Petersburg, Russia
| | - Natalia Linkova
- Department of Biogerontology, Saint Petersburg Institute of Bioregulation and Gerontology, 197110 Saint Petersburg, Russia; (V.K.); (A.D.); (R.U.)
- Department of Therapy, Geriatry, and Anti-Aging Medicine, Academy of Postgraduate Education under FSBU FSCC of FMBA of Russia, 125310 Moscow, Russia
- Department of Medical and Biological Disciplines, Belgorod State University, 308015 Belgorod, Russia
| | - Anastasiia Dyatlova
- Department of Biogerontology, Saint Petersburg Institute of Bioregulation and Gerontology, 197110 Saint Petersburg, Russia; (V.K.); (A.D.); (R.U.)
| | - Boris Kuznik
- Department of the normal physiology, Chita State Medical Academy, 672000 Chita, Russia;
| | - Roman Umnov
- Department of Biogerontology, Saint Petersburg Institute of Bioregulation and Gerontology, 197110 Saint Petersburg, Russia; (V.K.); (A.D.); (R.U.)
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17
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Pillaiyar T, Wendt LL, Manickam M, Easwaran M. The recent outbreaks of human coronaviruses: A medicinal chemistry perspective. Med Res Rev 2020; 41:72-135. [PMID: 32852058 PMCID: PMC7461420 DOI: 10.1002/med.21724] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 07/22/2020] [Accepted: 08/08/2020] [Indexed: 01/18/2023]
Abstract
Coronaviruses (CoVs) infect both humans and animals. In humans, CoVs can cause respiratory, kidney, heart, brain, and intestinal infections that can range from mild to lethal. Since the start of the 21st century, three β‐coronaviruses have crossed the species barrier to infect humans: severe‐acute respiratory syndrome (SARS)‐CoV‐1, Middle East respiratory syndrome (MERS)‐CoV, and SARS‐CoV‐2 (2019‐nCoV). These viruses are dangerous and can easily be transmitted from human to human. Therefore, the development of anticoronaviral therapies is urgently needed. However, to date, no approved vaccines or drugs against CoV infections are available. In this review, we focus on the medicinal chemistry efforts toward the development of antiviral agents against SARS‐CoV‐1, MERS‐CoV, SARS‐CoV‐2, targeting biochemical events important for viral replication and its life cycle. These targets include the spike glycoprotein and its host‐receptors for viral entry, proteases that are essential for cleaving polyproteins to produce functional proteins, and RNA‐dependent RNA polymerase for viral RNA replication.
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Affiliation(s)
- Thanigaimalai Pillaiyar
- PharmaCenter Bonn, Pharmaceutical Institute, Pharmaceutical & Medicinal Chemistry, University of Bonn, Bonn, Germany
| | - Lukas L Wendt
- PharmaCenter Bonn, Pharmaceutical Institute, Pharmaceutical & Medicinal Chemistry, University of Bonn, Bonn, Germany
| | - Manoj Manickam
- Department of Chemistry, PSG Institute of Technology and Applied Research, Coimbatore, Tamil Nadu, India
| | - Maheswaran Easwaran
- Department of Biomedical Engineering, Sethu Institute of Technology, Virudhunagar, Tamilnadu, India
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18
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Gélinas JF, Azizi H, Kiesslich S, Lanthier S, Perdersen J, Chahal PS, Ansorge S, Kobinger G, Gilbert R, Kamen AA. Production of rVSV-ZEBOV in serum-free suspension culture of HEK 293SF cells. Vaccine 2019; 37:6624-6632. [DOI: 10.1016/j.vaccine.2019.09.044] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Revised: 08/28/2019] [Accepted: 09/11/2019] [Indexed: 12/13/2022]
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19
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Computer-designed orthogonal RNA aptamers programmed to recognize Ebola virus glycoproteins. BIOSAFETY AND HEALTH 2019. [DOI: 10.1016/j.bsheal.2019.11.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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20
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Burns AL, Dans MG, Balbin JM, de Koning-Ward TF, Gilson PR, Beeson JG, Boyle MJ, Wilson DW. Targeting malaria parasite invasion of red blood cells as an antimalarial strategy. FEMS Microbiol Rev 2019; 43:223-238. [PMID: 30753425 PMCID: PMC6524681 DOI: 10.1093/femsre/fuz005] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2018] [Accepted: 02/11/2019] [Indexed: 12/20/2022] Open
Abstract
Plasmodium spp. parasites that cause malaria disease remain a significant global-health burden. With the spread of parasites resistant to artemisinin combination therapies in Southeast Asia, there is a growing need to develop new antimalarials with novel targets. Invasion of the red blood cell by Plasmodium merozoites is essential for parasite survival and proliferation, thus representing an attractive target for therapeutic development. Red blood cell invasion requires a co-ordinated series of protein/protein interactions, protease cleavage events, intracellular signals, organelle release and engagement of an actin-myosin motor, which provide many potential targets for drug development. As these steps occur in the bloodstream, they are directly susceptible and exposed to drugs. A number of invasion inhibitors against a diverse range of parasite proteins involved in these different processes of invasion have been identified, with several showing potential to be optimised for improved drug-like properties. In this review, we discuss red blood cell invasion as a drug target and highlight a number of approaches for developing antimalarials with invasion inhibitory activity to use in future combination therapies.
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Affiliation(s)
- Amy L Burns
- Research Centre for Infectious Diseases, School of Biological Sciences, University of Adelaide, Adelaide, Australia 5005
| | - Madeline G Dans
- Burnet Institute, Melbourne, Victoria, Australia 3004.,Deakin University, School of Medicine, Waurn Ponds, Victoria, Australia 3216
| | - Juan M Balbin
- Research Centre for Infectious Diseases, School of Biological Sciences, University of Adelaide, Adelaide, Australia 5005
| | | | - Paul R Gilson
- Burnet Institute, Melbourne, Victoria, Australia 3004
| | - James G Beeson
- Burnet Institute, Melbourne, Victoria, Australia 3004.,Central Clinical School and Department of Microbiology, Monash University 3004.,Department of Medicine, University of Melbourne, Australia 3052
| | - Michelle J Boyle
- Burnet Institute, Melbourne, Victoria, Australia 3004.,QIMR Berghofer Medical Research Institute, Herston, Queensland, Australia 4006
| | - Danny W Wilson
- Research Centre for Infectious Diseases, School of Biological Sciences, University of Adelaide, Adelaide, Australia 5005.,Burnet Institute, Melbourne, Victoria, Australia 3004
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21
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Xia S, Yan L, Xu W, Agrawal AS, Algaissi A, Tseng CTK, Wang Q, Du L, Tan W, Wilson IA, Jiang S, Yang B, Lu L. A pan-coronavirus fusion inhibitor targeting the HR1 domain of human coronavirus spike. SCIENCE ADVANCES 2019; 5:eaav4580. [PMID: 30989115 PMCID: PMC6457931 DOI: 10.1126/sciadv.aav4580] [Citation(s) in RCA: 342] [Impact Index Per Article: 68.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Accepted: 02/14/2019] [Indexed: 05/07/2023]
Abstract
Continuously emerging highly pathogenic human coronaviruses (HCoVs) remain a major threat to human health, as illustrated in past SARS-CoV and MERS-CoV outbreaks. The development of a drug with broad-spectrum HCoV inhibitory activity would address this urgent unmet medical need. Although previous studies have suggested that the HR1 of HCoV spike (S) protein is an important target site for inhibition against specific HCoVs, whether this conserved region could serve as a target for the development of broad-spectrum pan-CoV inhibitor remains controversial. Here, we found that peptide OC43-HR2P, derived from the HR2 domain of HCoV-OC43, exhibited broad fusion inhibitory activity against multiple HCoVs. EK1, the optimized form of OC43-HR2P, showed substantially improved pan-CoV fusion inhibitory activity and pharmaceutical properties. Crystal structures indicated that EK1 can form a stable six-helix bundle structure with both short α-HCoV and long β-HCoV HR1s, further supporting the role of HR1 region as a viable pan-CoV target site.
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Affiliation(s)
- Shuai Xia
- Shanghai Public Health Clinical Center and School of Basic Medical Sciences, and Key Laboratory of Medical Molecular Virology of MOE/MOH, Fudan University, Shanghai 200032, China
| | - Lei Yan
- Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, Shanghai 201210, China
| | - Wei Xu
- Shanghai Public Health Clinical Center and School of Basic Medical Sciences, and Key Laboratory of Medical Molecular Virology of MOE/MOH, Fudan University, Shanghai 200032, China
| | - Anurodh Shankar Agrawal
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX 77555, USA
| | - Abdullah Algaissi
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX 77555, USA
- Department of Medical Laboratories Technology, College of Applied Medical Sciences, Jazan University, Jazan, Saudi Arabia
| | - Chien-Te K. Tseng
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX 77555, USA
| | - Qian Wang
- Shanghai Public Health Clinical Center and School of Basic Medical Sciences, and Key Laboratory of Medical Molecular Virology of MOE/MOH, Fudan University, Shanghai 200032, China
| | - Lanying Du
- Lindsley F. Kimball Research Institute, New York Blood Center, New York, NY 10065, USA
| | - Wenjie Tan
- MOH Key Laboratory of Medical Virology, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Ian A. Wilson
- Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, Shanghai 201210, China
- Department of Integrative Structural and Computational Biology and the Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, BCC206, La Jolla, CA 92037, USA
- Corresponding author. (I.A.W.); (S.J.); (B.Y.); (L.L.)
| | - Shibo Jiang
- Shanghai Public Health Clinical Center and School of Basic Medical Sciences, and Key Laboratory of Medical Molecular Virology of MOE/MOH, Fudan University, Shanghai 200032, China
- Lindsley F. Kimball Research Institute, New York Blood Center, New York, NY 10065, USA
- Corresponding author. (I.A.W.); (S.J.); (B.Y.); (L.L.)
| | - Bei Yang
- Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, Shanghai 201210, China
- Corresponding author. (I.A.W.); (S.J.); (B.Y.); (L.L.)
| | - Lu Lu
- Shanghai Public Health Clinical Center and School of Basic Medical Sciences, and Key Laboratory of Medical Molecular Virology of MOE/MOH, Fudan University, Shanghai 200032, China
- Corresponding author. (I.A.W.); (S.J.); (B.Y.); (L.L.)
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22
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Si L, Meng K, Tian Z, Sun J, Li H, Zhang Z, Soloveva V, Li H, Fu G, Xia Q, Xiao S, Zhang L, Zhou D. Triterpenoids manipulate a broad range of virus-host fusion via wrapping the HR2 domain prevalent in viral envelopes. SCIENCE ADVANCES 2018; 4:eaau8408. [PMID: 30474060 PMCID: PMC6248931 DOI: 10.1126/sciadv.aau8408] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Accepted: 10/24/2018] [Indexed: 05/19/2023]
Abstract
A trimer-of-hairpins motif has been identified in triggering virus-cell fusion within a variety of viral envelopes. Chemically manipulating such a motif represents current repertoire of viral fusion inhibitors. Here, we report that triterpenoids, a class of natural products, antagonize this trimer-of-hairpins via its constitutive heptad repeat-2 (HR2), a prevalent α-helical coil in class I viral fusion proteins. Triterpenoids inhibit the entry of Ebola, Marburg, HIV, and influenza A viruses with distinct structure-activity relationships. Specifically, triterpenoid probes capture the viral envelope via photocrosslinking HR2. Profiling the Ebola HR2-triterpenoid interactions using amino acid substitution, surface plasmon resonance, and nuclear magnetic resonance revealed six residues accessible to triterpenoids, leading to wrapping of the hydrophobic helix and blocking of the HR1-HR2 interaction critical in the trimer-of-hairpins formation. This finding was also observed in the envelopes of HIV and influenza A viruses and might potentially extend to a broader variety of viruses, providing a mechanistic insight into triterpenoid-mediated modulation of viral fusion.
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Affiliation(s)
- Longlong Si
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Beijing 100191, China
| | - Kun Meng
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Beijing 100191, China
| | - Zhenyu Tian
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Beijing 100191, China
| | - Jiaqi Sun
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Beijing 100191, China
| | - Huiqiang Li
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Beijing 100191, China
| | - Ziwei Zhang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Beijing 100191, China
| | - Veronica Soloveva
- U.S. Army Medical Research Institute of Infectious Diseases, Fort Detrick, MD 21702, USA
| | - Haiwei Li
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Beijing 100191, China
| | - Ge Fu
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Beijing 100191, China
| | - Qing Xia
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Beijing 100191, China
| | - Sulong Xiao
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Beijing 100191, China
| | - Lihe Zhang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Beijing 100191, China
| | - Demin Zhou
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Beijing 100191, China
- Corresponding author.
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23
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Combinatorial use of disulfide bridges and native sulfur-SAD phasing for rapid structure determination of coiled-coils. Biosci Rep 2018; 38:BSR20181073. [PMID: 30135143 PMCID: PMC6146289 DOI: 10.1042/bsr20181073] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Revised: 08/06/2018] [Accepted: 08/13/2018] [Indexed: 01/16/2023] Open
Abstract
Coiled-coils are ubiquitous protein-protein interaction motifs found in many eukaryotic proteins. The elongated, flexible and often irregular nature of coiled-coils together with their tendency to form fibrous arrangements in crystals imposes challenges on solving the phase problem by molecular replacement. Here, we report the successful combinatorial use of native and rational engineered disulfide bridges together with sulfur-SAD phasing as a powerful tool to stabilize and solve the structure of coiled-coil domains in a straightforward manner. Our study is a key example of how modern sulfur SAD combined with mutagenesis can help to advance and simplify the structural study of challenging coiled-coil domains by X-ray crystallography.
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24
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Identification of a peptide derived from the heptad repeat 2 region of the porcine epidemic diarrhea virus (PEDV) spike glycoprotein that is capable of suppressing PEDV entry and inducing neutralizing antibodies. Antiviral Res 2017; 150:1-8. [PMID: 29203391 PMCID: PMC7113693 DOI: 10.1016/j.antiviral.2017.11.021] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Revised: 11/29/2017] [Accepted: 11/30/2017] [Indexed: 12/22/2022]
Abstract
Heptad repeat (HR) regions are highly conserved motifs located in the glycoproteins of enveloped viruses that form a six-helix bundle structure and is important in the process of virus fusion. Peptides derived from the HR regions of some viruses have also been shown to inhibit viral entry. Porcine epidemic diarrhea virus (PEDV) was predicted to have HR regions (HR1 and HR2) in the spike glycoprotein S2 subunit. Based on this analysis, six peptides derived from HR1 and HR2 were selected, expressed in Escherichia coli, purified, and characterized. Three peptides (HR2M, HR2L and HR2P) were identified as potential competitive inhibitors in PEDV in vitro infection assays, with the HR2P peptide representing the most potent inhibitor. Further study indicated that immunization of HR2P in mice elicited antibodies capable of neutralizing PEDV infection in vitro. These results demonstrate that the HR2P peptide and anti-HR2P antibody can serve as a tool for dissecting the fusion mechanism of PEDV, guiding the search for potent inhibitors with therapeutic value against PEDV infection. Six peptides derived from heptad repeat (HR) 1 and 2 regions of PEDV S glycoprotein were expressed and characterized. Three peptides (HR2M, HR2L and HR2P) exhibited antiviral activity in vitro. Immunization of the HR2P peptide in mice elicited antibodies capable of neutralizing PEDV infection in vitro. HR2P peptide can serve as a potential antiviral drug against PEDV infection.
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25
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ElSherif MS, Brown C, MacKinnon-Cameron D, Li L, Racine T, Alimonti J, Rudge TL, Sabourin C, Silvera P, Hooper JW, Kwilas SA, Kilgore N, Badorrek C, Ramsey WJ, Heppner DG, Kemp T, Monath TP, Nowak T, McNeil SA, Langley JM, Halperin SA. Assessing the safety and immunogenicity of recombinant vesicular stomatitis virus Ebola vaccine in healthy adults: a randomized clinical trial. CMAJ 2017. [PMID: 28630358 DOI: 10.1503/cmaj.170074] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
BACKGROUND The 2013-2016 Ebola virus outbreak in West Africa was the most widespread in history. In response, alive attenuated recombinant vesicular stomatitis virus (rVSV) vaccine expressing Zaire Ebolavirus glycoprotein (rVSVΔG-ZEBOV-GP) was evaluated in humans. METHODS In a phase 1, randomized, dose-ranging, observer-blind, placebo-controlled trial, healthy adults aged 18-65 years were randomized into 4 groups of 10 to receive one of 3 vaccine doses or placebo. Follow-up visits spanned 180 days postvaccination for safety monitoring, immunogenicity testing and any rVSV virus shedding. RESULTS Forty participants were injected with rVSVΔG-ZEBOV-GP vaccine (n = 30) or saline placebo (n = 10). No serious adverse events related to the vaccine or participant withdrawals were reported. Solicited adverse events during the 14-day follow-up period were mild to moderate and self-limited, with the exception of injection-site pain and headache. Viremia following vaccination was transient and no longer detectable after study day 3, with no virus shedding in saliva or urine. All vaccinated participants developed serum immunoglobulin G (IgG), as measured by Ebola virus envelope glycoprotein-based enzyme-linked immunosorbent assay (ELISA). Immunogenicity was comparable across all dose groups, and sustained IgG titers were detectable through to the last visit, at study day 180. INTERPRETATION In this phase 1 study, there were no safety concerns after a single dose of rVSVΔG-ZEBOV-GP vaccine. IgG ELISA showed persistent high titers at 180 days postimmunization. There was a period of reactogenicity, but in general, the vaccine was well tolerated. This study provides evidence of the safety and immunogenicity of rVSVΔG-ZEBOV-GP vaccine and importance of its further investigation. Trial registration: Clinical-Trials.gov no., NCT02374385.
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Affiliation(s)
- May S ElSherif
- Canadian Center for Vaccinology (ElSherif, Brown, MacKinnon-Cameron, Li, McNeil, Langley, Halperin), IWK Health Centre and Nova Scotia Health Authority, Dalhousie University, Halifax, NS; National Microbiology Laboratory (Racine, Alimonti), Winnipeg, Man.; Battelle Biomedical Research Center (Rudge, Sabourin), Columbus, Ohio; United States Army Medical Research Institute of Infectious Disease (Silvera, Hooper, Kwilas), Fort Detrick, Md.; Joint Program Executive Office for Chemical and Biological Defense Medical Countermeasure Systems' Joint Vaccine Acquisition Program (Kilgore, Badorrek), Fort Detrick, Md.; BioProtection Systems/NewLink Genetics Corporation (Ramsey, Heppner, Kemp, Monath), Ames, Iowa; Veristat LLC (Nowak), Southborough, Mass
| | - Catherine Brown
- Canadian Center for Vaccinology (ElSherif, Brown, MacKinnon-Cameron, Li, McNeil, Langley, Halperin), IWK Health Centre and Nova Scotia Health Authority, Dalhousie University, Halifax, NS; National Microbiology Laboratory (Racine, Alimonti), Winnipeg, Man.; Battelle Biomedical Research Center (Rudge, Sabourin), Columbus, Ohio; United States Army Medical Research Institute of Infectious Disease (Silvera, Hooper, Kwilas), Fort Detrick, Md.; Joint Program Executive Office for Chemical and Biological Defense Medical Countermeasure Systems' Joint Vaccine Acquisition Program (Kilgore, Badorrek), Fort Detrick, Md.; BioProtection Systems/NewLink Genetics Corporation (Ramsey, Heppner, Kemp, Monath), Ames, Iowa; Veristat LLC (Nowak), Southborough, Mass
| | - Donna MacKinnon-Cameron
- Canadian Center for Vaccinology (ElSherif, Brown, MacKinnon-Cameron, Li, McNeil, Langley, Halperin), IWK Health Centre and Nova Scotia Health Authority, Dalhousie University, Halifax, NS; National Microbiology Laboratory (Racine, Alimonti), Winnipeg, Man.; Battelle Biomedical Research Center (Rudge, Sabourin), Columbus, Ohio; United States Army Medical Research Institute of Infectious Disease (Silvera, Hooper, Kwilas), Fort Detrick, Md.; Joint Program Executive Office for Chemical and Biological Defense Medical Countermeasure Systems' Joint Vaccine Acquisition Program (Kilgore, Badorrek), Fort Detrick, Md.; BioProtection Systems/NewLink Genetics Corporation (Ramsey, Heppner, Kemp, Monath), Ames, Iowa; Veristat LLC (Nowak), Southborough, Mass
| | - Li Li
- Canadian Center for Vaccinology (ElSherif, Brown, MacKinnon-Cameron, Li, McNeil, Langley, Halperin), IWK Health Centre and Nova Scotia Health Authority, Dalhousie University, Halifax, NS; National Microbiology Laboratory (Racine, Alimonti), Winnipeg, Man.; Battelle Biomedical Research Center (Rudge, Sabourin), Columbus, Ohio; United States Army Medical Research Institute of Infectious Disease (Silvera, Hooper, Kwilas), Fort Detrick, Md.; Joint Program Executive Office for Chemical and Biological Defense Medical Countermeasure Systems' Joint Vaccine Acquisition Program (Kilgore, Badorrek), Fort Detrick, Md.; BioProtection Systems/NewLink Genetics Corporation (Ramsey, Heppner, Kemp, Monath), Ames, Iowa; Veristat LLC (Nowak), Southborough, Mass
| | - Trina Racine
- Canadian Center for Vaccinology (ElSherif, Brown, MacKinnon-Cameron, Li, McNeil, Langley, Halperin), IWK Health Centre and Nova Scotia Health Authority, Dalhousie University, Halifax, NS; National Microbiology Laboratory (Racine, Alimonti), Winnipeg, Man.; Battelle Biomedical Research Center (Rudge, Sabourin), Columbus, Ohio; United States Army Medical Research Institute of Infectious Disease (Silvera, Hooper, Kwilas), Fort Detrick, Md.; Joint Program Executive Office for Chemical and Biological Defense Medical Countermeasure Systems' Joint Vaccine Acquisition Program (Kilgore, Badorrek), Fort Detrick, Md.; BioProtection Systems/NewLink Genetics Corporation (Ramsey, Heppner, Kemp, Monath), Ames, Iowa; Veristat LLC (Nowak), Southborough, Mass
| | - Judie Alimonti
- Canadian Center for Vaccinology (ElSherif, Brown, MacKinnon-Cameron, Li, McNeil, Langley, Halperin), IWK Health Centre and Nova Scotia Health Authority, Dalhousie University, Halifax, NS; National Microbiology Laboratory (Racine, Alimonti), Winnipeg, Man.; Battelle Biomedical Research Center (Rudge, Sabourin), Columbus, Ohio; United States Army Medical Research Institute of Infectious Disease (Silvera, Hooper, Kwilas), Fort Detrick, Md.; Joint Program Executive Office for Chemical and Biological Defense Medical Countermeasure Systems' Joint Vaccine Acquisition Program (Kilgore, Badorrek), Fort Detrick, Md.; BioProtection Systems/NewLink Genetics Corporation (Ramsey, Heppner, Kemp, Monath), Ames, Iowa; Veristat LLC (Nowak), Southborough, Mass
| | - Thomas L Rudge
- Canadian Center for Vaccinology (ElSherif, Brown, MacKinnon-Cameron, Li, McNeil, Langley, Halperin), IWK Health Centre and Nova Scotia Health Authority, Dalhousie University, Halifax, NS; National Microbiology Laboratory (Racine, Alimonti), Winnipeg, Man.; Battelle Biomedical Research Center (Rudge, Sabourin), Columbus, Ohio; United States Army Medical Research Institute of Infectious Disease (Silvera, Hooper, Kwilas), Fort Detrick, Md.; Joint Program Executive Office for Chemical and Biological Defense Medical Countermeasure Systems' Joint Vaccine Acquisition Program (Kilgore, Badorrek), Fort Detrick, Md.; BioProtection Systems/NewLink Genetics Corporation (Ramsey, Heppner, Kemp, Monath), Ames, Iowa; Veristat LLC (Nowak), Southborough, Mass
| | - Carol Sabourin
- Canadian Center for Vaccinology (ElSherif, Brown, MacKinnon-Cameron, Li, McNeil, Langley, Halperin), IWK Health Centre and Nova Scotia Health Authority, Dalhousie University, Halifax, NS; National Microbiology Laboratory (Racine, Alimonti), Winnipeg, Man.; Battelle Biomedical Research Center (Rudge, Sabourin), Columbus, Ohio; United States Army Medical Research Institute of Infectious Disease (Silvera, Hooper, Kwilas), Fort Detrick, Md.; Joint Program Executive Office for Chemical and Biological Defense Medical Countermeasure Systems' Joint Vaccine Acquisition Program (Kilgore, Badorrek), Fort Detrick, Md.; BioProtection Systems/NewLink Genetics Corporation (Ramsey, Heppner, Kemp, Monath), Ames, Iowa; Veristat LLC (Nowak), Southborough, Mass
| | - Peter Silvera
- Canadian Center for Vaccinology (ElSherif, Brown, MacKinnon-Cameron, Li, McNeil, Langley, Halperin), IWK Health Centre and Nova Scotia Health Authority, Dalhousie University, Halifax, NS; National Microbiology Laboratory (Racine, Alimonti), Winnipeg, Man.; Battelle Biomedical Research Center (Rudge, Sabourin), Columbus, Ohio; United States Army Medical Research Institute of Infectious Disease (Silvera, Hooper, Kwilas), Fort Detrick, Md.; Joint Program Executive Office for Chemical and Biological Defense Medical Countermeasure Systems' Joint Vaccine Acquisition Program (Kilgore, Badorrek), Fort Detrick, Md.; BioProtection Systems/NewLink Genetics Corporation (Ramsey, Heppner, Kemp, Monath), Ames, Iowa; Veristat LLC (Nowak), Southborough, Mass
| | - Jay W Hooper
- Canadian Center for Vaccinology (ElSherif, Brown, MacKinnon-Cameron, Li, McNeil, Langley, Halperin), IWK Health Centre and Nova Scotia Health Authority, Dalhousie University, Halifax, NS; National Microbiology Laboratory (Racine, Alimonti), Winnipeg, Man.; Battelle Biomedical Research Center (Rudge, Sabourin), Columbus, Ohio; United States Army Medical Research Institute of Infectious Disease (Silvera, Hooper, Kwilas), Fort Detrick, Md.; Joint Program Executive Office for Chemical and Biological Defense Medical Countermeasure Systems' Joint Vaccine Acquisition Program (Kilgore, Badorrek), Fort Detrick, Md.; BioProtection Systems/NewLink Genetics Corporation (Ramsey, Heppner, Kemp, Monath), Ames, Iowa; Veristat LLC (Nowak), Southborough, Mass
| | - Steven A Kwilas
- Canadian Center for Vaccinology (ElSherif, Brown, MacKinnon-Cameron, Li, McNeil, Langley, Halperin), IWK Health Centre and Nova Scotia Health Authority, Dalhousie University, Halifax, NS; National Microbiology Laboratory (Racine, Alimonti), Winnipeg, Man.; Battelle Biomedical Research Center (Rudge, Sabourin), Columbus, Ohio; United States Army Medical Research Institute of Infectious Disease (Silvera, Hooper, Kwilas), Fort Detrick, Md.; Joint Program Executive Office for Chemical and Biological Defense Medical Countermeasure Systems' Joint Vaccine Acquisition Program (Kilgore, Badorrek), Fort Detrick, Md.; BioProtection Systems/NewLink Genetics Corporation (Ramsey, Heppner, Kemp, Monath), Ames, Iowa; Veristat LLC (Nowak), Southborough, Mass
| | - Nicole Kilgore
- Canadian Center for Vaccinology (ElSherif, Brown, MacKinnon-Cameron, Li, McNeil, Langley, Halperin), IWK Health Centre and Nova Scotia Health Authority, Dalhousie University, Halifax, NS; National Microbiology Laboratory (Racine, Alimonti), Winnipeg, Man.; Battelle Biomedical Research Center (Rudge, Sabourin), Columbus, Ohio; United States Army Medical Research Institute of Infectious Disease (Silvera, Hooper, Kwilas), Fort Detrick, Md.; Joint Program Executive Office for Chemical and Biological Defense Medical Countermeasure Systems' Joint Vaccine Acquisition Program (Kilgore, Badorrek), Fort Detrick, Md.; BioProtection Systems/NewLink Genetics Corporation (Ramsey, Heppner, Kemp, Monath), Ames, Iowa; Veristat LLC (Nowak), Southborough, Mass
| | - Christopher Badorrek
- Canadian Center for Vaccinology (ElSherif, Brown, MacKinnon-Cameron, Li, McNeil, Langley, Halperin), IWK Health Centre and Nova Scotia Health Authority, Dalhousie University, Halifax, NS; National Microbiology Laboratory (Racine, Alimonti), Winnipeg, Man.; Battelle Biomedical Research Center (Rudge, Sabourin), Columbus, Ohio; United States Army Medical Research Institute of Infectious Disease (Silvera, Hooper, Kwilas), Fort Detrick, Md.; Joint Program Executive Office for Chemical and Biological Defense Medical Countermeasure Systems' Joint Vaccine Acquisition Program (Kilgore, Badorrek), Fort Detrick, Md.; BioProtection Systems/NewLink Genetics Corporation (Ramsey, Heppner, Kemp, Monath), Ames, Iowa; Veristat LLC (Nowak), Southborough, Mass
| | - W Jay Ramsey
- Canadian Center for Vaccinology (ElSherif, Brown, MacKinnon-Cameron, Li, McNeil, Langley, Halperin), IWK Health Centre and Nova Scotia Health Authority, Dalhousie University, Halifax, NS; National Microbiology Laboratory (Racine, Alimonti), Winnipeg, Man.; Battelle Biomedical Research Center (Rudge, Sabourin), Columbus, Ohio; United States Army Medical Research Institute of Infectious Disease (Silvera, Hooper, Kwilas), Fort Detrick, Md.; Joint Program Executive Office for Chemical and Biological Defense Medical Countermeasure Systems' Joint Vaccine Acquisition Program (Kilgore, Badorrek), Fort Detrick, Md.; BioProtection Systems/NewLink Genetics Corporation (Ramsey, Heppner, Kemp, Monath), Ames, Iowa; Veristat LLC (Nowak), Southborough, Mass
| | - D Gray Heppner
- Canadian Center for Vaccinology (ElSherif, Brown, MacKinnon-Cameron, Li, McNeil, Langley, Halperin), IWK Health Centre and Nova Scotia Health Authority, Dalhousie University, Halifax, NS; National Microbiology Laboratory (Racine, Alimonti), Winnipeg, Man.; Battelle Biomedical Research Center (Rudge, Sabourin), Columbus, Ohio; United States Army Medical Research Institute of Infectious Disease (Silvera, Hooper, Kwilas), Fort Detrick, Md.; Joint Program Executive Office for Chemical and Biological Defense Medical Countermeasure Systems' Joint Vaccine Acquisition Program (Kilgore, Badorrek), Fort Detrick, Md.; BioProtection Systems/NewLink Genetics Corporation (Ramsey, Heppner, Kemp, Monath), Ames, Iowa; Veristat LLC (Nowak), Southborough, Mass
| | - Tracy Kemp
- Canadian Center for Vaccinology (ElSherif, Brown, MacKinnon-Cameron, Li, McNeil, Langley, Halperin), IWK Health Centre and Nova Scotia Health Authority, Dalhousie University, Halifax, NS; National Microbiology Laboratory (Racine, Alimonti), Winnipeg, Man.; Battelle Biomedical Research Center (Rudge, Sabourin), Columbus, Ohio; United States Army Medical Research Institute of Infectious Disease (Silvera, Hooper, Kwilas), Fort Detrick, Md.; Joint Program Executive Office for Chemical and Biological Defense Medical Countermeasure Systems' Joint Vaccine Acquisition Program (Kilgore, Badorrek), Fort Detrick, Md.; BioProtection Systems/NewLink Genetics Corporation (Ramsey, Heppner, Kemp, Monath), Ames, Iowa; Veristat LLC (Nowak), Southborough, Mass
| | - Thomas P Monath
- Canadian Center for Vaccinology (ElSherif, Brown, MacKinnon-Cameron, Li, McNeil, Langley, Halperin), IWK Health Centre and Nova Scotia Health Authority, Dalhousie University, Halifax, NS; National Microbiology Laboratory (Racine, Alimonti), Winnipeg, Man.; Battelle Biomedical Research Center (Rudge, Sabourin), Columbus, Ohio; United States Army Medical Research Institute of Infectious Disease (Silvera, Hooper, Kwilas), Fort Detrick, Md.; Joint Program Executive Office for Chemical and Biological Defense Medical Countermeasure Systems' Joint Vaccine Acquisition Program (Kilgore, Badorrek), Fort Detrick, Md.; BioProtection Systems/NewLink Genetics Corporation (Ramsey, Heppner, Kemp, Monath), Ames, Iowa; Veristat LLC (Nowak), Southborough, Mass
| | - Teresa Nowak
- Canadian Center for Vaccinology (ElSherif, Brown, MacKinnon-Cameron, Li, McNeil, Langley, Halperin), IWK Health Centre and Nova Scotia Health Authority, Dalhousie University, Halifax, NS; National Microbiology Laboratory (Racine, Alimonti), Winnipeg, Man.; Battelle Biomedical Research Center (Rudge, Sabourin), Columbus, Ohio; United States Army Medical Research Institute of Infectious Disease (Silvera, Hooper, Kwilas), Fort Detrick, Md.; Joint Program Executive Office for Chemical and Biological Defense Medical Countermeasure Systems' Joint Vaccine Acquisition Program (Kilgore, Badorrek), Fort Detrick, Md.; BioProtection Systems/NewLink Genetics Corporation (Ramsey, Heppner, Kemp, Monath), Ames, Iowa; Veristat LLC (Nowak), Southborough, Mass
| | - Shelly A McNeil
- Canadian Center for Vaccinology (ElSherif, Brown, MacKinnon-Cameron, Li, McNeil, Langley, Halperin), IWK Health Centre and Nova Scotia Health Authority, Dalhousie University, Halifax, NS; National Microbiology Laboratory (Racine, Alimonti), Winnipeg, Man.; Battelle Biomedical Research Center (Rudge, Sabourin), Columbus, Ohio; United States Army Medical Research Institute of Infectious Disease (Silvera, Hooper, Kwilas), Fort Detrick, Md.; Joint Program Executive Office for Chemical and Biological Defense Medical Countermeasure Systems' Joint Vaccine Acquisition Program (Kilgore, Badorrek), Fort Detrick, Md.; BioProtection Systems/NewLink Genetics Corporation (Ramsey, Heppner, Kemp, Monath), Ames, Iowa; Veristat LLC (Nowak), Southborough, Mass
| | - Joanne M Langley
- Canadian Center for Vaccinology (ElSherif, Brown, MacKinnon-Cameron, Li, McNeil, Langley, Halperin), IWK Health Centre and Nova Scotia Health Authority, Dalhousie University, Halifax, NS; National Microbiology Laboratory (Racine, Alimonti), Winnipeg, Man.; Battelle Biomedical Research Center (Rudge, Sabourin), Columbus, Ohio; United States Army Medical Research Institute of Infectious Disease (Silvera, Hooper, Kwilas), Fort Detrick, Md.; Joint Program Executive Office for Chemical and Biological Defense Medical Countermeasure Systems' Joint Vaccine Acquisition Program (Kilgore, Badorrek), Fort Detrick, Md.; BioProtection Systems/NewLink Genetics Corporation (Ramsey, Heppner, Kemp, Monath), Ames, Iowa; Veristat LLC (Nowak), Southborough, Mass
| | - Scott A Halperin
- Canadian Center for Vaccinology (ElSherif, Brown, MacKinnon-Cameron, Li, McNeil, Langley, Halperin), IWK Health Centre and Nova Scotia Health Authority, Dalhousie University, Halifax, NS; National Microbiology Laboratory (Racine, Alimonti), Winnipeg, Man.; Battelle Biomedical Research Center (Rudge, Sabourin), Columbus, Ohio; United States Army Medical Research Institute of Infectious Disease (Silvera, Hooper, Kwilas), Fort Detrick, Md.; Joint Program Executive Office for Chemical and Biological Defense Medical Countermeasure Systems' Joint Vaccine Acquisition Program (Kilgore, Badorrek), Fort Detrick, Md.; BioProtection Systems/NewLink Genetics Corporation (Ramsey, Heppner, Kemp, Monath), Ames, Iowa; Veristat LLC (Nowak), Southborough, Mass.
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Yu DS, Weng TH, Wu XX, Wang FXC, Lu XY, Wu HB, Wu NP, Li LJ, Yao HP. The lifecycle of the Ebola virus in host cells. Oncotarget 2017; 8:55750-55759. [PMID: 28903457 PMCID: PMC5589696 DOI: 10.18632/oncotarget.18498] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Accepted: 05/29/2017] [Indexed: 01/01/2023] Open
Abstract
Ebola haemorrhagic fever causes deadly disease in humans and non-human primates resulting from infection with the Ebola virus (EBOV) genus of the family Filoviridae. However, the mechanisms of EBOV lifecycle in host cells, including viral entry, membrane fusion, RNP formation, GP-tetherin interaction, and VP40-inner leaflet association remain poorly understood. This review describes the biological functions of EBOV proteins and their roles in the lifecycle, summarizes the factors related to EBOV proteins or RNA expression throughout the different phases, and reviews advances with regards to the molecular events and mechanisms of the EBOV lifecycle. Furthermore, the review outlines the aspects remain unclear that urgently need to be solved in future research.
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Affiliation(s)
- Dong-Shan Yu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
| | - Tian-Hao Weng
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
| | - Xiao-Xin Wu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
| | - Frederick X C Wang
- Department of Bioengineering, Erik Jonsson School of Engineering and Computer Science, The University of Texas at Dallas, Dallas, TX, USA
| | - Xiang-Yun Lu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
| | - Hai-Bo Wu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
| | - Nan-Ping Wu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
| | - Lan-Juan Li
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
| | - Hang-Ping Yao
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
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Regules JA, Beigel JH, Paolino KM, Voell J, Castellano AR, Hu Z, Muñoz P, Moon JE, Ruck RC, Bennett JW, Twomey PS, Gutiérrez RL, Remich SA, Hack HR, Wisniewski ML, Josleyn MD, Kwilas SA, Van Deusen N, Mbaya OT, Zhou Y, Stanley DA, Jing W, Smith KS, Shi M, Ledgerwood JE, Graham BS, Sullivan NJ, Jagodzinski LL, Peel SA, Alimonti JB, Hooper JW, Silvera PM, Martin BK, Monath TP, Ramsey WJ, Link CJ, Lane HC, Michael NL, Davey RT, Thomas SJ. A Recombinant Vesicular Stomatitis Virus Ebola Vaccine. N Engl J Med 2017; 376:330-341. [PMID: 25830322 PMCID: PMC5408576 DOI: 10.1056/nejmoa1414216] [Citation(s) in RCA: 273] [Impact Index Per Article: 39.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
BACKGROUND The worst Ebola virus disease (EVD) outbreak in history has resulted in more than 28,000 cases and 11,000 deaths. We present the final results of two phase 1 trials of an attenuated, replication-competent, recombinant vesicular stomatitis virus (rVSV)-based vaccine candidate designed to prevent EVD. METHODS We conducted two phase 1, placebo-controlled, double-blind, dose-escalation trials of an rVSV-based vaccine candidate expressing the glycoprotein of a Zaire strain of Ebola virus (ZEBOV). A total of 39 adults at each site (78 participants in all) were consecutively enrolled into groups of 13. At each site, volunteers received one of three doses of the rVSV-ZEBOV vaccine (3 million plaque-forming units [PFU], 20 million PFU, or 100 million PFU) or placebo. Volunteers at one of the sites received a second dose at day 28. Safety and immunogenicity were assessed. RESULTS The most common adverse events were injection-site pain, fatigue, myalgia, and headache. Transient rVSV viremia was noted in all the vaccine recipients after dose 1. The rates of adverse events and viremia were lower after the second dose than after the first dose. By day 28, all the vaccine recipients had seroconversion as assessed by an enzyme-linked immunosorbent assay (ELISA) against the glycoprotein of the ZEBOV-Kikwit strain. At day 28, geometric mean titers of antibodies against ZEBOV glycoprotein were higher in the groups that received 20 million PFU or 100 million PFU than in the group that received 3 million PFU, as assessed by ELISA and by pseudovirion neutralization assay. A second dose at 28 days after dose 1 significantly increased antibody titers at day 56, but the effect was diminished at 6 months. CONCLUSIONS This Ebola vaccine candidate elicited anti-Ebola antibody responses. After vaccination, rVSV viremia occurred frequently but was transient. These results support further evaluation of the vaccine dose of 20 million PFU for preexposure prophylaxis and suggest that a second dose may boost antibody responses. (Funded by the National Institutes of Health and others; rVSV∆G-ZEBOV-GP ClinicalTrials.gov numbers, NCT02269423 and NCT02280408 .).
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Affiliation(s)
- Jason A Regules
- From the Walter Reed Army Institute of Research (J.A.R., K.M.P., A.R.C., J.E.M., R.C.R., J.W.B., P.S.T., S.A.R., H.R.H., M.S., L.L.J., S.A.P., N.L.M., S.J.T.) and Naval Medical Research Center (R.L.G.), Silver Spring, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research (J.H.B., W.J.), and the U.S. Army Medical Research Institute of Infectious Diseases (M.L.W., M.D.J., S.A.K., N.V.D., K.S.S., J.W.H., P.M.S.), Frederick, and the National Institute of Allergy and Infectious Diseases (NIAID) (J.V., Z.H., P.M., H.C.L., R.T.D.) and NIAID Vaccine Research Center (O.T.M., Y.Z., D.A.S., J.E.L., B.S.G., N.J.S.), Bethesda - all in Maryland; the Public Health Agency of Canada, Ottawa (J.B.A.); and BioProtection Systems-NewLink Genetics, Ames, IA (B.K.M., T.P.M., W.J.R., C.J.L.)
| | - John H Beigel
- From the Walter Reed Army Institute of Research (J.A.R., K.M.P., A.R.C., J.E.M., R.C.R., J.W.B., P.S.T., S.A.R., H.R.H., M.S., L.L.J., S.A.P., N.L.M., S.J.T.) and Naval Medical Research Center (R.L.G.), Silver Spring, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research (J.H.B., W.J.), and the U.S. Army Medical Research Institute of Infectious Diseases (M.L.W., M.D.J., S.A.K., N.V.D., K.S.S., J.W.H., P.M.S.), Frederick, and the National Institute of Allergy and Infectious Diseases (NIAID) (J.V., Z.H., P.M., H.C.L., R.T.D.) and NIAID Vaccine Research Center (O.T.M., Y.Z., D.A.S., J.E.L., B.S.G., N.J.S.), Bethesda - all in Maryland; the Public Health Agency of Canada, Ottawa (J.B.A.); and BioProtection Systems-NewLink Genetics, Ames, IA (B.K.M., T.P.M., W.J.R., C.J.L.)
| | - Kristopher M Paolino
- From the Walter Reed Army Institute of Research (J.A.R., K.M.P., A.R.C., J.E.M., R.C.R., J.W.B., P.S.T., S.A.R., H.R.H., M.S., L.L.J., S.A.P., N.L.M., S.J.T.) and Naval Medical Research Center (R.L.G.), Silver Spring, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research (J.H.B., W.J.), and the U.S. Army Medical Research Institute of Infectious Diseases (M.L.W., M.D.J., S.A.K., N.V.D., K.S.S., J.W.H., P.M.S.), Frederick, and the National Institute of Allergy and Infectious Diseases (NIAID) (J.V., Z.H., P.M., H.C.L., R.T.D.) and NIAID Vaccine Research Center (O.T.M., Y.Z., D.A.S., J.E.L., B.S.G., N.J.S.), Bethesda - all in Maryland; the Public Health Agency of Canada, Ottawa (J.B.A.); and BioProtection Systems-NewLink Genetics, Ames, IA (B.K.M., T.P.M., W.J.R., C.J.L.)
| | - Jocelyn Voell
- From the Walter Reed Army Institute of Research (J.A.R., K.M.P., A.R.C., J.E.M., R.C.R., J.W.B., P.S.T., S.A.R., H.R.H., M.S., L.L.J., S.A.P., N.L.M., S.J.T.) and Naval Medical Research Center (R.L.G.), Silver Spring, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research (J.H.B., W.J.), and the U.S. Army Medical Research Institute of Infectious Diseases (M.L.W., M.D.J., S.A.K., N.V.D., K.S.S., J.W.H., P.M.S.), Frederick, and the National Institute of Allergy and Infectious Diseases (NIAID) (J.V., Z.H., P.M., H.C.L., R.T.D.) and NIAID Vaccine Research Center (O.T.M., Y.Z., D.A.S., J.E.L., B.S.G., N.J.S.), Bethesda - all in Maryland; the Public Health Agency of Canada, Ottawa (J.B.A.); and BioProtection Systems-NewLink Genetics, Ames, IA (B.K.M., T.P.M., W.J.R., C.J.L.)
| | - Amy R Castellano
- From the Walter Reed Army Institute of Research (J.A.R., K.M.P., A.R.C., J.E.M., R.C.R., J.W.B., P.S.T., S.A.R., H.R.H., M.S., L.L.J., S.A.P., N.L.M., S.J.T.) and Naval Medical Research Center (R.L.G.), Silver Spring, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research (J.H.B., W.J.), and the U.S. Army Medical Research Institute of Infectious Diseases (M.L.W., M.D.J., S.A.K., N.V.D., K.S.S., J.W.H., P.M.S.), Frederick, and the National Institute of Allergy and Infectious Diseases (NIAID) (J.V., Z.H., P.M., H.C.L., R.T.D.) and NIAID Vaccine Research Center (O.T.M., Y.Z., D.A.S., J.E.L., B.S.G., N.J.S.), Bethesda - all in Maryland; the Public Health Agency of Canada, Ottawa (J.B.A.); and BioProtection Systems-NewLink Genetics, Ames, IA (B.K.M., T.P.M., W.J.R., C.J.L.)
| | - Zonghui Hu
- From the Walter Reed Army Institute of Research (J.A.R., K.M.P., A.R.C., J.E.M., R.C.R., J.W.B., P.S.T., S.A.R., H.R.H., M.S., L.L.J., S.A.P., N.L.M., S.J.T.) and Naval Medical Research Center (R.L.G.), Silver Spring, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research (J.H.B., W.J.), and the U.S. Army Medical Research Institute of Infectious Diseases (M.L.W., M.D.J., S.A.K., N.V.D., K.S.S., J.W.H., P.M.S.), Frederick, and the National Institute of Allergy and Infectious Diseases (NIAID) (J.V., Z.H., P.M., H.C.L., R.T.D.) and NIAID Vaccine Research Center (O.T.M., Y.Z., D.A.S., J.E.L., B.S.G., N.J.S.), Bethesda - all in Maryland; the Public Health Agency of Canada, Ottawa (J.B.A.); and BioProtection Systems-NewLink Genetics, Ames, IA (B.K.M., T.P.M., W.J.R., C.J.L.)
| | - Paula Muñoz
- From the Walter Reed Army Institute of Research (J.A.R., K.M.P., A.R.C., J.E.M., R.C.R., J.W.B., P.S.T., S.A.R., H.R.H., M.S., L.L.J., S.A.P., N.L.M., S.J.T.) and Naval Medical Research Center (R.L.G.), Silver Spring, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research (J.H.B., W.J.), and the U.S. Army Medical Research Institute of Infectious Diseases (M.L.W., M.D.J., S.A.K., N.V.D., K.S.S., J.W.H., P.M.S.), Frederick, and the National Institute of Allergy and Infectious Diseases (NIAID) (J.V., Z.H., P.M., H.C.L., R.T.D.) and NIAID Vaccine Research Center (O.T.M., Y.Z., D.A.S., J.E.L., B.S.G., N.J.S.), Bethesda - all in Maryland; the Public Health Agency of Canada, Ottawa (J.B.A.); and BioProtection Systems-NewLink Genetics, Ames, IA (B.K.M., T.P.M., W.J.R., C.J.L.)
| | - James E Moon
- From the Walter Reed Army Institute of Research (J.A.R., K.M.P., A.R.C., J.E.M., R.C.R., J.W.B., P.S.T., S.A.R., H.R.H., M.S., L.L.J., S.A.P., N.L.M., S.J.T.) and Naval Medical Research Center (R.L.G.), Silver Spring, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research (J.H.B., W.J.), and the U.S. Army Medical Research Institute of Infectious Diseases (M.L.W., M.D.J., S.A.K., N.V.D., K.S.S., J.W.H., P.M.S.), Frederick, and the National Institute of Allergy and Infectious Diseases (NIAID) (J.V., Z.H., P.M., H.C.L., R.T.D.) and NIAID Vaccine Research Center (O.T.M., Y.Z., D.A.S., J.E.L., B.S.G., N.J.S.), Bethesda - all in Maryland; the Public Health Agency of Canada, Ottawa (J.B.A.); and BioProtection Systems-NewLink Genetics, Ames, IA (B.K.M., T.P.M., W.J.R., C.J.L.)
| | - Richard C Ruck
- From the Walter Reed Army Institute of Research (J.A.R., K.M.P., A.R.C., J.E.M., R.C.R., J.W.B., P.S.T., S.A.R., H.R.H., M.S., L.L.J., S.A.P., N.L.M., S.J.T.) and Naval Medical Research Center (R.L.G.), Silver Spring, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research (J.H.B., W.J.), and the U.S. Army Medical Research Institute of Infectious Diseases (M.L.W., M.D.J., S.A.K., N.V.D., K.S.S., J.W.H., P.M.S.), Frederick, and the National Institute of Allergy and Infectious Diseases (NIAID) (J.V., Z.H., P.M., H.C.L., R.T.D.) and NIAID Vaccine Research Center (O.T.M., Y.Z., D.A.S., J.E.L., B.S.G., N.J.S.), Bethesda - all in Maryland; the Public Health Agency of Canada, Ottawa (J.B.A.); and BioProtection Systems-NewLink Genetics, Ames, IA (B.K.M., T.P.M., W.J.R., C.J.L.)
| | - Jason W Bennett
- From the Walter Reed Army Institute of Research (J.A.R., K.M.P., A.R.C., J.E.M., R.C.R., J.W.B., P.S.T., S.A.R., H.R.H., M.S., L.L.J., S.A.P., N.L.M., S.J.T.) and Naval Medical Research Center (R.L.G.), Silver Spring, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research (J.H.B., W.J.), and the U.S. Army Medical Research Institute of Infectious Diseases (M.L.W., M.D.J., S.A.K., N.V.D., K.S.S., J.W.H., P.M.S.), Frederick, and the National Institute of Allergy and Infectious Diseases (NIAID) (J.V., Z.H., P.M., H.C.L., R.T.D.) and NIAID Vaccine Research Center (O.T.M., Y.Z., D.A.S., J.E.L., B.S.G., N.J.S.), Bethesda - all in Maryland; the Public Health Agency of Canada, Ottawa (J.B.A.); and BioProtection Systems-NewLink Genetics, Ames, IA (B.K.M., T.P.M., W.J.R., C.J.L.)
| | - Patrick S Twomey
- From the Walter Reed Army Institute of Research (J.A.R., K.M.P., A.R.C., J.E.M., R.C.R., J.W.B., P.S.T., S.A.R., H.R.H., M.S., L.L.J., S.A.P., N.L.M., S.J.T.) and Naval Medical Research Center (R.L.G.), Silver Spring, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research (J.H.B., W.J.), and the U.S. Army Medical Research Institute of Infectious Diseases (M.L.W., M.D.J., S.A.K., N.V.D., K.S.S., J.W.H., P.M.S.), Frederick, and the National Institute of Allergy and Infectious Diseases (NIAID) (J.V., Z.H., P.M., H.C.L., R.T.D.) and NIAID Vaccine Research Center (O.T.M., Y.Z., D.A.S., J.E.L., B.S.G., N.J.S.), Bethesda - all in Maryland; the Public Health Agency of Canada, Ottawa (J.B.A.); and BioProtection Systems-NewLink Genetics, Ames, IA (B.K.M., T.P.M., W.J.R., C.J.L.)
| | - Ramiro L Gutiérrez
- From the Walter Reed Army Institute of Research (J.A.R., K.M.P., A.R.C., J.E.M., R.C.R., J.W.B., P.S.T., S.A.R., H.R.H., M.S., L.L.J., S.A.P., N.L.M., S.J.T.) and Naval Medical Research Center (R.L.G.), Silver Spring, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research (J.H.B., W.J.), and the U.S. Army Medical Research Institute of Infectious Diseases (M.L.W., M.D.J., S.A.K., N.V.D., K.S.S., J.W.H., P.M.S.), Frederick, and the National Institute of Allergy and Infectious Diseases (NIAID) (J.V., Z.H., P.M., H.C.L., R.T.D.) and NIAID Vaccine Research Center (O.T.M., Y.Z., D.A.S., J.E.L., B.S.G., N.J.S.), Bethesda - all in Maryland; the Public Health Agency of Canada, Ottawa (J.B.A.); and BioProtection Systems-NewLink Genetics, Ames, IA (B.K.M., T.P.M., W.J.R., C.J.L.)
| | - Shon A Remich
- From the Walter Reed Army Institute of Research (J.A.R., K.M.P., A.R.C., J.E.M., R.C.R., J.W.B., P.S.T., S.A.R., H.R.H., M.S., L.L.J., S.A.P., N.L.M., S.J.T.) and Naval Medical Research Center (R.L.G.), Silver Spring, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research (J.H.B., W.J.), and the U.S. Army Medical Research Institute of Infectious Diseases (M.L.W., M.D.J., S.A.K., N.V.D., K.S.S., J.W.H., P.M.S.), Frederick, and the National Institute of Allergy and Infectious Diseases (NIAID) (J.V., Z.H., P.M., H.C.L., R.T.D.) and NIAID Vaccine Research Center (O.T.M., Y.Z., D.A.S., J.E.L., B.S.G., N.J.S.), Bethesda - all in Maryland; the Public Health Agency of Canada, Ottawa (J.B.A.); and BioProtection Systems-NewLink Genetics, Ames, IA (B.K.M., T.P.M., W.J.R., C.J.L.)
| | - Holly R Hack
- From the Walter Reed Army Institute of Research (J.A.R., K.M.P., A.R.C., J.E.M., R.C.R., J.W.B., P.S.T., S.A.R., H.R.H., M.S., L.L.J., S.A.P., N.L.M., S.J.T.) and Naval Medical Research Center (R.L.G.), Silver Spring, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research (J.H.B., W.J.), and the U.S. Army Medical Research Institute of Infectious Diseases (M.L.W., M.D.J., S.A.K., N.V.D., K.S.S., J.W.H., P.M.S.), Frederick, and the National Institute of Allergy and Infectious Diseases (NIAID) (J.V., Z.H., P.M., H.C.L., R.T.D.) and NIAID Vaccine Research Center (O.T.M., Y.Z., D.A.S., J.E.L., B.S.G., N.J.S.), Bethesda - all in Maryland; the Public Health Agency of Canada, Ottawa (J.B.A.); and BioProtection Systems-NewLink Genetics, Ames, IA (B.K.M., T.P.M., W.J.R., C.J.L.)
| | - Meagan L Wisniewski
- From the Walter Reed Army Institute of Research (J.A.R., K.M.P., A.R.C., J.E.M., R.C.R., J.W.B., P.S.T., S.A.R., H.R.H., M.S., L.L.J., S.A.P., N.L.M., S.J.T.) and Naval Medical Research Center (R.L.G.), Silver Spring, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research (J.H.B., W.J.), and the U.S. Army Medical Research Institute of Infectious Diseases (M.L.W., M.D.J., S.A.K., N.V.D., K.S.S., J.W.H., P.M.S.), Frederick, and the National Institute of Allergy and Infectious Diseases (NIAID) (J.V., Z.H., P.M., H.C.L., R.T.D.) and NIAID Vaccine Research Center (O.T.M., Y.Z., D.A.S., J.E.L., B.S.G., N.J.S.), Bethesda - all in Maryland; the Public Health Agency of Canada, Ottawa (J.B.A.); and BioProtection Systems-NewLink Genetics, Ames, IA (B.K.M., T.P.M., W.J.R., C.J.L.)
| | - Matthew D Josleyn
- From the Walter Reed Army Institute of Research (J.A.R., K.M.P., A.R.C., J.E.M., R.C.R., J.W.B., P.S.T., S.A.R., H.R.H., M.S., L.L.J., S.A.P., N.L.M., S.J.T.) and Naval Medical Research Center (R.L.G.), Silver Spring, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research (J.H.B., W.J.), and the U.S. Army Medical Research Institute of Infectious Diseases (M.L.W., M.D.J., S.A.K., N.V.D., K.S.S., J.W.H., P.M.S.), Frederick, and the National Institute of Allergy and Infectious Diseases (NIAID) (J.V., Z.H., P.M., H.C.L., R.T.D.) and NIAID Vaccine Research Center (O.T.M., Y.Z., D.A.S., J.E.L., B.S.G., N.J.S.), Bethesda - all in Maryland; the Public Health Agency of Canada, Ottawa (J.B.A.); and BioProtection Systems-NewLink Genetics, Ames, IA (B.K.M., T.P.M., W.J.R., C.J.L.)
| | - Steven A Kwilas
- From the Walter Reed Army Institute of Research (J.A.R., K.M.P., A.R.C., J.E.M., R.C.R., J.W.B., P.S.T., S.A.R., H.R.H., M.S., L.L.J., S.A.P., N.L.M., S.J.T.) and Naval Medical Research Center (R.L.G.), Silver Spring, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research (J.H.B., W.J.), and the U.S. Army Medical Research Institute of Infectious Diseases (M.L.W., M.D.J., S.A.K., N.V.D., K.S.S., J.W.H., P.M.S.), Frederick, and the National Institute of Allergy and Infectious Diseases (NIAID) (J.V., Z.H., P.M., H.C.L., R.T.D.) and NIAID Vaccine Research Center (O.T.M., Y.Z., D.A.S., J.E.L., B.S.G., N.J.S.), Bethesda - all in Maryland; the Public Health Agency of Canada, Ottawa (J.B.A.); and BioProtection Systems-NewLink Genetics, Ames, IA (B.K.M., T.P.M., W.J.R., C.J.L.)
| | - Nicole Van Deusen
- From the Walter Reed Army Institute of Research (J.A.R., K.M.P., A.R.C., J.E.M., R.C.R., J.W.B., P.S.T., S.A.R., H.R.H., M.S., L.L.J., S.A.P., N.L.M., S.J.T.) and Naval Medical Research Center (R.L.G.), Silver Spring, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research (J.H.B., W.J.), and the U.S. Army Medical Research Institute of Infectious Diseases (M.L.W., M.D.J., S.A.K., N.V.D., K.S.S., J.W.H., P.M.S.), Frederick, and the National Institute of Allergy and Infectious Diseases (NIAID) (J.V., Z.H., P.M., H.C.L., R.T.D.) and NIAID Vaccine Research Center (O.T.M., Y.Z., D.A.S., J.E.L., B.S.G., N.J.S.), Bethesda - all in Maryland; the Public Health Agency of Canada, Ottawa (J.B.A.); and BioProtection Systems-NewLink Genetics, Ames, IA (B.K.M., T.P.M., W.J.R., C.J.L.)
| | - Olivier Tshiani Mbaya
- From the Walter Reed Army Institute of Research (J.A.R., K.M.P., A.R.C., J.E.M., R.C.R., J.W.B., P.S.T., S.A.R., H.R.H., M.S., L.L.J., S.A.P., N.L.M., S.J.T.) and Naval Medical Research Center (R.L.G.), Silver Spring, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research (J.H.B., W.J.), and the U.S. Army Medical Research Institute of Infectious Diseases (M.L.W., M.D.J., S.A.K., N.V.D., K.S.S., J.W.H., P.M.S.), Frederick, and the National Institute of Allergy and Infectious Diseases (NIAID) (J.V., Z.H., P.M., H.C.L., R.T.D.) and NIAID Vaccine Research Center (O.T.M., Y.Z., D.A.S., J.E.L., B.S.G., N.J.S.), Bethesda - all in Maryland; the Public Health Agency of Canada, Ottawa (J.B.A.); and BioProtection Systems-NewLink Genetics, Ames, IA (B.K.M., T.P.M., W.J.R., C.J.L.)
| | - Yan Zhou
- From the Walter Reed Army Institute of Research (J.A.R., K.M.P., A.R.C., J.E.M., R.C.R., J.W.B., P.S.T., S.A.R., H.R.H., M.S., L.L.J., S.A.P., N.L.M., S.J.T.) and Naval Medical Research Center (R.L.G.), Silver Spring, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research (J.H.B., W.J.), and the U.S. Army Medical Research Institute of Infectious Diseases (M.L.W., M.D.J., S.A.K., N.V.D., K.S.S., J.W.H., P.M.S.), Frederick, and the National Institute of Allergy and Infectious Diseases (NIAID) (J.V., Z.H., P.M., H.C.L., R.T.D.) and NIAID Vaccine Research Center (O.T.M., Y.Z., D.A.S., J.E.L., B.S.G., N.J.S.), Bethesda - all in Maryland; the Public Health Agency of Canada, Ottawa (J.B.A.); and BioProtection Systems-NewLink Genetics, Ames, IA (B.K.M., T.P.M., W.J.R., C.J.L.)
| | - Daphne A Stanley
- From the Walter Reed Army Institute of Research (J.A.R., K.M.P., A.R.C., J.E.M., R.C.R., J.W.B., P.S.T., S.A.R., H.R.H., M.S., L.L.J., S.A.P., N.L.M., S.J.T.) and Naval Medical Research Center (R.L.G.), Silver Spring, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research (J.H.B., W.J.), and the U.S. Army Medical Research Institute of Infectious Diseases (M.L.W., M.D.J., S.A.K., N.V.D., K.S.S., J.W.H., P.M.S.), Frederick, and the National Institute of Allergy and Infectious Diseases (NIAID) (J.V., Z.H., P.M., H.C.L., R.T.D.) and NIAID Vaccine Research Center (O.T.M., Y.Z., D.A.S., J.E.L., B.S.G., N.J.S.), Bethesda - all in Maryland; the Public Health Agency of Canada, Ottawa (J.B.A.); and BioProtection Systems-NewLink Genetics, Ames, IA (B.K.M., T.P.M., W.J.R., C.J.L.)
| | - Wang Jing
- From the Walter Reed Army Institute of Research (J.A.R., K.M.P., A.R.C., J.E.M., R.C.R., J.W.B., P.S.T., S.A.R., H.R.H., M.S., L.L.J., S.A.P., N.L.M., S.J.T.) and Naval Medical Research Center (R.L.G.), Silver Spring, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research (J.H.B., W.J.), and the U.S. Army Medical Research Institute of Infectious Diseases (M.L.W., M.D.J., S.A.K., N.V.D., K.S.S., J.W.H., P.M.S.), Frederick, and the National Institute of Allergy and Infectious Diseases (NIAID) (J.V., Z.H., P.M., H.C.L., R.T.D.) and NIAID Vaccine Research Center (O.T.M., Y.Z., D.A.S., J.E.L., B.S.G., N.J.S.), Bethesda - all in Maryland; the Public Health Agency of Canada, Ottawa (J.B.A.); and BioProtection Systems-NewLink Genetics, Ames, IA (B.K.M., T.P.M., W.J.R., C.J.L.)
| | - Kirsten S Smith
- From the Walter Reed Army Institute of Research (J.A.R., K.M.P., A.R.C., J.E.M., R.C.R., J.W.B., P.S.T., S.A.R., H.R.H., M.S., L.L.J., S.A.P., N.L.M., S.J.T.) and Naval Medical Research Center (R.L.G.), Silver Spring, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research (J.H.B., W.J.), and the U.S. Army Medical Research Institute of Infectious Diseases (M.L.W., M.D.J., S.A.K., N.V.D., K.S.S., J.W.H., P.M.S.), Frederick, and the National Institute of Allergy and Infectious Diseases (NIAID) (J.V., Z.H., P.M., H.C.L., R.T.D.) and NIAID Vaccine Research Center (O.T.M., Y.Z., D.A.S., J.E.L., B.S.G., N.J.S.), Bethesda - all in Maryland; the Public Health Agency of Canada, Ottawa (J.B.A.); and BioProtection Systems-NewLink Genetics, Ames, IA (B.K.M., T.P.M., W.J.R., C.J.L.)
| | - Meng Shi
- From the Walter Reed Army Institute of Research (J.A.R., K.M.P., A.R.C., J.E.M., R.C.R., J.W.B., P.S.T., S.A.R., H.R.H., M.S., L.L.J., S.A.P., N.L.M., S.J.T.) and Naval Medical Research Center (R.L.G.), Silver Spring, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research (J.H.B., W.J.), and the U.S. Army Medical Research Institute of Infectious Diseases (M.L.W., M.D.J., S.A.K., N.V.D., K.S.S., J.W.H., P.M.S.), Frederick, and the National Institute of Allergy and Infectious Diseases (NIAID) (J.V., Z.H., P.M., H.C.L., R.T.D.) and NIAID Vaccine Research Center (O.T.M., Y.Z., D.A.S., J.E.L., B.S.G., N.J.S.), Bethesda - all in Maryland; the Public Health Agency of Canada, Ottawa (J.B.A.); and BioProtection Systems-NewLink Genetics, Ames, IA (B.K.M., T.P.M., W.J.R., C.J.L.)
| | - Julie E Ledgerwood
- From the Walter Reed Army Institute of Research (J.A.R., K.M.P., A.R.C., J.E.M., R.C.R., J.W.B., P.S.T., S.A.R., H.R.H., M.S., L.L.J., S.A.P., N.L.M., S.J.T.) and Naval Medical Research Center (R.L.G.), Silver Spring, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research (J.H.B., W.J.), and the U.S. Army Medical Research Institute of Infectious Diseases (M.L.W., M.D.J., S.A.K., N.V.D., K.S.S., J.W.H., P.M.S.), Frederick, and the National Institute of Allergy and Infectious Diseases (NIAID) (J.V., Z.H., P.M., H.C.L., R.T.D.) and NIAID Vaccine Research Center (O.T.M., Y.Z., D.A.S., J.E.L., B.S.G., N.J.S.), Bethesda - all in Maryland; the Public Health Agency of Canada, Ottawa (J.B.A.); and BioProtection Systems-NewLink Genetics, Ames, IA (B.K.M., T.P.M., W.J.R., C.J.L.)
| | - Barney S Graham
- From the Walter Reed Army Institute of Research (J.A.R., K.M.P., A.R.C., J.E.M., R.C.R., J.W.B., P.S.T., S.A.R., H.R.H., M.S., L.L.J., S.A.P., N.L.M., S.J.T.) and Naval Medical Research Center (R.L.G.), Silver Spring, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research (J.H.B., W.J.), and the U.S. Army Medical Research Institute of Infectious Diseases (M.L.W., M.D.J., S.A.K., N.V.D., K.S.S., J.W.H., P.M.S.), Frederick, and the National Institute of Allergy and Infectious Diseases (NIAID) (J.V., Z.H., P.M., H.C.L., R.T.D.) and NIAID Vaccine Research Center (O.T.M., Y.Z., D.A.S., J.E.L., B.S.G., N.J.S.), Bethesda - all in Maryland; the Public Health Agency of Canada, Ottawa (J.B.A.); and BioProtection Systems-NewLink Genetics, Ames, IA (B.K.M., T.P.M., W.J.R., C.J.L.)
| | - Nancy J Sullivan
- From the Walter Reed Army Institute of Research (J.A.R., K.M.P., A.R.C., J.E.M., R.C.R., J.W.B., P.S.T., S.A.R., H.R.H., M.S., L.L.J., S.A.P., N.L.M., S.J.T.) and Naval Medical Research Center (R.L.G.), Silver Spring, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research (J.H.B., W.J.), and the U.S. Army Medical Research Institute of Infectious Diseases (M.L.W., M.D.J., S.A.K., N.V.D., K.S.S., J.W.H., P.M.S.), Frederick, and the National Institute of Allergy and Infectious Diseases (NIAID) (J.V., Z.H., P.M., H.C.L., R.T.D.) and NIAID Vaccine Research Center (O.T.M., Y.Z., D.A.S., J.E.L., B.S.G., N.J.S.), Bethesda - all in Maryland; the Public Health Agency of Canada, Ottawa (J.B.A.); and BioProtection Systems-NewLink Genetics, Ames, IA (B.K.M., T.P.M., W.J.R., C.J.L.)
| | - Linda L Jagodzinski
- From the Walter Reed Army Institute of Research (J.A.R., K.M.P., A.R.C., J.E.M., R.C.R., J.W.B., P.S.T., S.A.R., H.R.H., M.S., L.L.J., S.A.P., N.L.M., S.J.T.) and Naval Medical Research Center (R.L.G.), Silver Spring, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research (J.H.B., W.J.), and the U.S. Army Medical Research Institute of Infectious Diseases (M.L.W., M.D.J., S.A.K., N.V.D., K.S.S., J.W.H., P.M.S.), Frederick, and the National Institute of Allergy and Infectious Diseases (NIAID) (J.V., Z.H., P.M., H.C.L., R.T.D.) and NIAID Vaccine Research Center (O.T.M., Y.Z., D.A.S., J.E.L., B.S.G., N.J.S.), Bethesda - all in Maryland; the Public Health Agency of Canada, Ottawa (J.B.A.); and BioProtection Systems-NewLink Genetics, Ames, IA (B.K.M., T.P.M., W.J.R., C.J.L.)
| | - Sheila A Peel
- From the Walter Reed Army Institute of Research (J.A.R., K.M.P., A.R.C., J.E.M., R.C.R., J.W.B., P.S.T., S.A.R., H.R.H., M.S., L.L.J., S.A.P., N.L.M., S.J.T.) and Naval Medical Research Center (R.L.G.), Silver Spring, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research (J.H.B., W.J.), and the U.S. Army Medical Research Institute of Infectious Diseases (M.L.W., M.D.J., S.A.K., N.V.D., K.S.S., J.W.H., P.M.S.), Frederick, and the National Institute of Allergy and Infectious Diseases (NIAID) (J.V., Z.H., P.M., H.C.L., R.T.D.) and NIAID Vaccine Research Center (O.T.M., Y.Z., D.A.S., J.E.L., B.S.G., N.J.S.), Bethesda - all in Maryland; the Public Health Agency of Canada, Ottawa (J.B.A.); and BioProtection Systems-NewLink Genetics, Ames, IA (B.K.M., T.P.M., W.J.R., C.J.L.)
| | - Judie B Alimonti
- From the Walter Reed Army Institute of Research (J.A.R., K.M.P., A.R.C., J.E.M., R.C.R., J.W.B., P.S.T., S.A.R., H.R.H., M.S., L.L.J., S.A.P., N.L.M., S.J.T.) and Naval Medical Research Center (R.L.G.), Silver Spring, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research (J.H.B., W.J.), and the U.S. Army Medical Research Institute of Infectious Diseases (M.L.W., M.D.J., S.A.K., N.V.D., K.S.S., J.W.H., P.M.S.), Frederick, and the National Institute of Allergy and Infectious Diseases (NIAID) (J.V., Z.H., P.M., H.C.L., R.T.D.) and NIAID Vaccine Research Center (O.T.M., Y.Z., D.A.S., J.E.L., B.S.G., N.J.S.), Bethesda - all in Maryland; the Public Health Agency of Canada, Ottawa (J.B.A.); and BioProtection Systems-NewLink Genetics, Ames, IA (B.K.M., T.P.M., W.J.R., C.J.L.)
| | - Jay W Hooper
- From the Walter Reed Army Institute of Research (J.A.R., K.M.P., A.R.C., J.E.M., R.C.R., J.W.B., P.S.T., S.A.R., H.R.H., M.S., L.L.J., S.A.P., N.L.M., S.J.T.) and Naval Medical Research Center (R.L.G.), Silver Spring, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research (J.H.B., W.J.), and the U.S. Army Medical Research Institute of Infectious Diseases (M.L.W., M.D.J., S.A.K., N.V.D., K.S.S., J.W.H., P.M.S.), Frederick, and the National Institute of Allergy and Infectious Diseases (NIAID) (J.V., Z.H., P.M., H.C.L., R.T.D.) and NIAID Vaccine Research Center (O.T.M., Y.Z., D.A.S., J.E.L., B.S.G., N.J.S.), Bethesda - all in Maryland; the Public Health Agency of Canada, Ottawa (J.B.A.); and BioProtection Systems-NewLink Genetics, Ames, IA (B.K.M., T.P.M., W.J.R., C.J.L.)
| | - Peter M Silvera
- From the Walter Reed Army Institute of Research (J.A.R., K.M.P., A.R.C., J.E.M., R.C.R., J.W.B., P.S.T., S.A.R., H.R.H., M.S., L.L.J., S.A.P., N.L.M., S.J.T.) and Naval Medical Research Center (R.L.G.), Silver Spring, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research (J.H.B., W.J.), and the U.S. Army Medical Research Institute of Infectious Diseases (M.L.W., M.D.J., S.A.K., N.V.D., K.S.S., J.W.H., P.M.S.), Frederick, and the National Institute of Allergy and Infectious Diseases (NIAID) (J.V., Z.H., P.M., H.C.L., R.T.D.) and NIAID Vaccine Research Center (O.T.M., Y.Z., D.A.S., J.E.L., B.S.G., N.J.S.), Bethesda - all in Maryland; the Public Health Agency of Canada, Ottawa (J.B.A.); and BioProtection Systems-NewLink Genetics, Ames, IA (B.K.M., T.P.M., W.J.R., C.J.L.)
| | - Brian K Martin
- From the Walter Reed Army Institute of Research (J.A.R., K.M.P., A.R.C., J.E.M., R.C.R., J.W.B., P.S.T., S.A.R., H.R.H., M.S., L.L.J., S.A.P., N.L.M., S.J.T.) and Naval Medical Research Center (R.L.G.), Silver Spring, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research (J.H.B., W.J.), and the U.S. Army Medical Research Institute of Infectious Diseases (M.L.W., M.D.J., S.A.K., N.V.D., K.S.S., J.W.H., P.M.S.), Frederick, and the National Institute of Allergy and Infectious Diseases (NIAID) (J.V., Z.H., P.M., H.C.L., R.T.D.) and NIAID Vaccine Research Center (O.T.M., Y.Z., D.A.S., J.E.L., B.S.G., N.J.S.), Bethesda - all in Maryland; the Public Health Agency of Canada, Ottawa (J.B.A.); and BioProtection Systems-NewLink Genetics, Ames, IA (B.K.M., T.P.M., W.J.R., C.J.L.)
| | - Thomas P Monath
- From the Walter Reed Army Institute of Research (J.A.R., K.M.P., A.R.C., J.E.M., R.C.R., J.W.B., P.S.T., S.A.R., H.R.H., M.S., L.L.J., S.A.P., N.L.M., S.J.T.) and Naval Medical Research Center (R.L.G.), Silver Spring, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research (J.H.B., W.J.), and the U.S. Army Medical Research Institute of Infectious Diseases (M.L.W., M.D.J., S.A.K., N.V.D., K.S.S., J.W.H., P.M.S.), Frederick, and the National Institute of Allergy and Infectious Diseases (NIAID) (J.V., Z.H., P.M., H.C.L., R.T.D.) and NIAID Vaccine Research Center (O.T.M., Y.Z., D.A.S., J.E.L., B.S.G., N.J.S.), Bethesda - all in Maryland; the Public Health Agency of Canada, Ottawa (J.B.A.); and BioProtection Systems-NewLink Genetics, Ames, IA (B.K.M., T.P.M., W.J.R., C.J.L.)
| | - W Jay Ramsey
- From the Walter Reed Army Institute of Research (J.A.R., K.M.P., A.R.C., J.E.M., R.C.R., J.W.B., P.S.T., S.A.R., H.R.H., M.S., L.L.J., S.A.P., N.L.M., S.J.T.) and Naval Medical Research Center (R.L.G.), Silver Spring, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research (J.H.B., W.J.), and the U.S. Army Medical Research Institute of Infectious Diseases (M.L.W., M.D.J., S.A.K., N.V.D., K.S.S., J.W.H., P.M.S.), Frederick, and the National Institute of Allergy and Infectious Diseases (NIAID) (J.V., Z.H., P.M., H.C.L., R.T.D.) and NIAID Vaccine Research Center (O.T.M., Y.Z., D.A.S., J.E.L., B.S.G., N.J.S.), Bethesda - all in Maryland; the Public Health Agency of Canada, Ottawa (J.B.A.); and BioProtection Systems-NewLink Genetics, Ames, IA (B.K.M., T.P.M., W.J.R., C.J.L.)
| | - Charles J Link
- From the Walter Reed Army Institute of Research (J.A.R., K.M.P., A.R.C., J.E.M., R.C.R., J.W.B., P.S.T., S.A.R., H.R.H., M.S., L.L.J., S.A.P., N.L.M., S.J.T.) and Naval Medical Research Center (R.L.G.), Silver Spring, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research (J.H.B., W.J.), and the U.S. Army Medical Research Institute of Infectious Diseases (M.L.W., M.D.J., S.A.K., N.V.D., K.S.S., J.W.H., P.M.S.), Frederick, and the National Institute of Allergy and Infectious Diseases (NIAID) (J.V., Z.H., P.M., H.C.L., R.T.D.) and NIAID Vaccine Research Center (O.T.M., Y.Z., D.A.S., J.E.L., B.S.G., N.J.S.), Bethesda - all in Maryland; the Public Health Agency of Canada, Ottawa (J.B.A.); and BioProtection Systems-NewLink Genetics, Ames, IA (B.K.M., T.P.M., W.J.R., C.J.L.)
| | - H Clifford Lane
- From the Walter Reed Army Institute of Research (J.A.R., K.M.P., A.R.C., J.E.M., R.C.R., J.W.B., P.S.T., S.A.R., H.R.H., M.S., L.L.J., S.A.P., N.L.M., S.J.T.) and Naval Medical Research Center (R.L.G.), Silver Spring, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research (J.H.B., W.J.), and the U.S. Army Medical Research Institute of Infectious Diseases (M.L.W., M.D.J., S.A.K., N.V.D., K.S.S., J.W.H., P.M.S.), Frederick, and the National Institute of Allergy and Infectious Diseases (NIAID) (J.V., Z.H., P.M., H.C.L., R.T.D.) and NIAID Vaccine Research Center (O.T.M., Y.Z., D.A.S., J.E.L., B.S.G., N.J.S.), Bethesda - all in Maryland; the Public Health Agency of Canada, Ottawa (J.B.A.); and BioProtection Systems-NewLink Genetics, Ames, IA (B.K.M., T.P.M., W.J.R., C.J.L.)
| | - Nelson L Michael
- From the Walter Reed Army Institute of Research (J.A.R., K.M.P., A.R.C., J.E.M., R.C.R., J.W.B., P.S.T., S.A.R., H.R.H., M.S., L.L.J., S.A.P., N.L.M., S.J.T.) and Naval Medical Research Center (R.L.G.), Silver Spring, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research (J.H.B., W.J.), and the U.S. Army Medical Research Institute of Infectious Diseases (M.L.W., M.D.J., S.A.K., N.V.D., K.S.S., J.W.H., P.M.S.), Frederick, and the National Institute of Allergy and Infectious Diseases (NIAID) (J.V., Z.H., P.M., H.C.L., R.T.D.) and NIAID Vaccine Research Center (O.T.M., Y.Z., D.A.S., J.E.L., B.S.G., N.J.S.), Bethesda - all in Maryland; the Public Health Agency of Canada, Ottawa (J.B.A.); and BioProtection Systems-NewLink Genetics, Ames, IA (B.K.M., T.P.M., W.J.R., C.J.L.)
| | - Richard T Davey
- From the Walter Reed Army Institute of Research (J.A.R., K.M.P., A.R.C., J.E.M., R.C.R., J.W.B., P.S.T., S.A.R., H.R.H., M.S., L.L.J., S.A.P., N.L.M., S.J.T.) and Naval Medical Research Center (R.L.G.), Silver Spring, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research (J.H.B., W.J.), and the U.S. Army Medical Research Institute of Infectious Diseases (M.L.W., M.D.J., S.A.K., N.V.D., K.S.S., J.W.H., P.M.S.), Frederick, and the National Institute of Allergy and Infectious Diseases (NIAID) (J.V., Z.H., P.M., H.C.L., R.T.D.) and NIAID Vaccine Research Center (O.T.M., Y.Z., D.A.S., J.E.L., B.S.G., N.J.S.), Bethesda - all in Maryland; the Public Health Agency of Canada, Ottawa (J.B.A.); and BioProtection Systems-NewLink Genetics, Ames, IA (B.K.M., T.P.M., W.J.R., C.J.L.)
| | - Stephen J Thomas
- From the Walter Reed Army Institute of Research (J.A.R., K.M.P., A.R.C., J.E.M., R.C.R., J.W.B., P.S.T., S.A.R., H.R.H., M.S., L.L.J., S.A.P., N.L.M., S.J.T.) and Naval Medical Research Center (R.L.G.), Silver Spring, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research (J.H.B., W.J.), and the U.S. Army Medical Research Institute of Infectious Diseases (M.L.W., M.D.J., S.A.K., N.V.D., K.S.S., J.W.H., P.M.S.), Frederick, and the National Institute of Allergy and Infectious Diseases (NIAID) (J.V., Z.H., P.M., H.C.L., R.T.D.) and NIAID Vaccine Research Center (O.T.M., Y.Z., D.A.S., J.E.L., B.S.G., N.J.S.), Bethesda - all in Maryland; the Public Health Agency of Canada, Ottawa (J.B.A.); and BioProtection Systems-NewLink Genetics, Ames, IA (B.K.M., T.P.M., W.J.R., C.J.L.)
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Davey RA, Shtanko O, Anantpadma M, Sakurai Y, Chandran K, Maury W. Mechanisms of Filovirus Entry. Curr Top Microbiol Immunol 2017; 411:323-352. [PMID: 28601947 DOI: 10.1007/82_2017_14] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Filovirus entry into cells is complex, perhaps as complex as any viral entry mechanism identified to date. However, over the past 10 years, the important events required for filoviruses to enter into the endosomal compartment and fuse with vesicular membranes have been elucidated (Fig. 1). Here, we highlight the important steps that are required for productive entry of filoviruses into mammalian cells.
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Affiliation(s)
- R A Davey
- Department of Virology and Immunology, Texas Biomedical Research Institute, San Antonio, TX, USA
| | - O Shtanko
- Department of Virology and Immunology, Texas Biomedical Research Institute, San Antonio, TX, USA
| | - M Anantpadma
- Department of Virology and Immunology, Texas Biomedical Research Institute, San Antonio, TX, USA
| | - Y Sakurai
- Department of Virology and Immunology, Texas Biomedical Research Institute, San Antonio, TX, USA
| | - K Chandran
- Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - W Maury
- Department of Microbiology, The University of Iowa, Iowa City, IA, USA.
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Rivera A, Messaoudi I. Molecular mechanisms of Ebola pathogenesis. J Leukoc Biol 2016; 100:889-904. [PMID: 27587404 PMCID: PMC6608070 DOI: 10.1189/jlb.4ri0316-099rr] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Revised: 08/02/2016] [Accepted: 08/03/2016] [Indexed: 12/13/2022] Open
Abstract
Ebola viruses (EBOVs) and Marburg viruses (MARVs) are among the deadliest human viruses, as highlighted by the recent and widespread Ebola virus outbreak in West Africa, which was the largest and longest epidemic of Ebola virus disease (EVD) in history, resulting in significant loss of life and disruptions across multiple continents. Although the number of cases has nearly reached its nadir, a recent cluster of 5 cases in Guinea on March 17, 2016, has extended the enhanced surveillance period to June 15, 2016. New, enhanced 90-d surveillance windows replaced the 42-d surveillance window to ensure the rapid detection of new cases that may arise from a missed transmission chain, reintroduction from an animal reservoir, or more important, reemergence of the virus that has persisted in an EVD survivor. In this review, we summarize our current understanding of EBOV pathogenesis, describe vaccine and therapeutic candidates in clinical trials, and discuss mechanisms of viral persistence and long-term health sequelae for EVD survivors.
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Affiliation(s)
- Andrea Rivera
- Division of Biomedical Sciences, University of California, Riverside, Riverside, California, USA
| | - Ilhem Messaoudi
- Division of Biomedical Sciences, University of California, Riverside, Riverside, California, USA
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Wang Q, Wong G, Lu G, Yan J, Gao GF. MERS-CoV spike protein: Targets for vaccines and therapeutics. Antiviral Res 2016; 133:165-77. [PMID: 27468951 PMCID: PMC7113765 DOI: 10.1016/j.antiviral.2016.07.015] [Citation(s) in RCA: 80] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2016] [Revised: 07/07/2016] [Accepted: 07/22/2016] [Indexed: 02/05/2023]
Abstract
The disease outbreak caused by Middle East respiratory syndrome coronavirus (MERS-CoV) is still ongoing in the Middle East. Over 1700 people have been infected since it was first reported in September 2012. Despite great efforts, licensed vaccines or therapeutics against MERS-CoV remain unavailable. The MERS-CoV spike (S) protein is an important viral antigen known to mediate host-receptor binding and virus entry, as well as induce robust humoral and cell-mediated responses in humans during infection. In this review, we highlight the importance of the S protein in the MERS-CoV life cycle, summarize recent advances in the development of vaccines and therapeutics based on the S protein, and discuss strategies that can be explored to develop new medical countermeasures against MERS-CoV. A licensed vaccine or therapeutic against MERS-CoV remains unavailable to date. The S protein plays a pivotal role for virus entry and thus is an ideal target for vaccine and antiviral development. DNA vaccines expressing the S protein merit further development for potential human application. nAbs and peptides targeting the S protein needs to be evaluated in NHPs before clinical trials.
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MESH Headings
- Animals
- Antibodies, Neutralizing/immunology
- Antibodies, Viral/immunology
- Antiviral Agents/pharmacology
- Antiviral Agents/therapeutic use
- Coronavirus Infections/prevention & control
- Coronavirus Infections/therapy
- Drug Discovery
- Humans
- Middle East Respiratory Syndrome Coronavirus/immunology
- Middle East Respiratory Syndrome Coronavirus/physiology
- Receptors, Virus/chemistry
- Receptors, Virus/metabolism
- Spike Glycoprotein, Coronavirus/chemistry
- Spike Glycoprotein, Coronavirus/genetics
- Spike Glycoprotein, Coronavirus/immunology
- Spike Glycoprotein, Coronavirus/metabolism
- Structure-Activity Relationship
- Vaccines, DNA/immunology
- Vaccines, Subunit/immunology
- Vaccines, Virus-Like Particle/immunology
- Viral Vaccines/immunology
- Virus Internalization
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Affiliation(s)
- Qihui Wang
- CAS Key Laboratory of Microbial Physiological and Metabolic Engineering, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China; Shenzhen Key Laboratory of Pathogen and Immunity, Shenzhen Third People's Hospital, Shenzhen 518112, China.
| | - Gary Wong
- Shenzhen Key Laboratory of Pathogen and Immunity, Shenzhen Third People's Hospital, Shenzhen 518112, China; CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China; CAS Center for Influenza Research and Early-warning (CASCIRE), Chinese Academy of Sciences, Beijing 100101, China
| | - Guangwen Lu
- West China Hospital Emergency Department (WCHED), State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, and Collaborative Innovation Center of Biotherapy, Chengdu, Sichuan 610041, China
| | - Jinghua Yan
- CAS Key Laboratory of Microbial Physiological and Metabolic Engineering, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China; Shenzhen Key Laboratory of Pathogen and Immunity, Shenzhen Third People's Hospital, Shenzhen 518112, China; CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - George F Gao
- Shenzhen Key Laboratory of Pathogen and Immunity, Shenzhen Third People's Hospital, Shenzhen 518112, China; CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China; CAS Center for Influenza Research and Early-warning (CASCIRE), Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China; National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention (China CDC), Beijing 102206, China; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Zhejiang University, Hangzhou 310003, China; Savaid Medical School, University of Chinese Academy of Sciences, Beijing 100049, China.
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Patent highlights: February-March 2016. Pharm Pat Anal 2016; 5:203-9. [PMID: 27336587 DOI: 10.4155/ppa-2016-0019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A snapshot of noteworthy recent developments in the patent literature of relevance to pharmaceutical and medical research and development.
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Lai W, Wang C, Yu F, Lu L, Wang Q, Jiang X, Xu X, Zhang T, Wu S, Zheng X, Zhang Z, Dong F, Jiang S, Liu K. An effective strategy for recapitulating N-terminal heptad repeat trimers in enveloped virus surface glycoproteins for therapeutic applications. Chem Sci 2016; 7:2145-2150. [PMID: 29899942 PMCID: PMC5968561 DOI: 10.1039/c5sc04046a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2015] [Accepted: 11/30/2015] [Indexed: 11/21/2022] Open
Abstract
Sequestering peptides derived from the N-terminal heptad repeat (NHR) of class I viral fusion proteins into a non-aggregating trimeric coiled-coil conformation remains a major challenge. Here, we implemented a synthetic strategy to stabilize NHR-helical trimers, with the human immunodeficiency virus type 1 (HIV-1) gp41 fusion protein as the initial focus. A set of trimeric scaffolds was realized in a synthetic gp41 NHR-derived peptide sequence by relying on the tractability of coiled-coil structures and an additional isopeptide bridge-tethering strategy. Among them, (N36M)3 folded as a highly stable helical trimer and exhibited promising inhibitory activity against HIV-1 infection, exceptional resistance to proteolysis, and effective native ligand-binding capability. We anticipate that the trimeric coiled-coil recapitulation methodology described herein may have broader applicability to yield NHR trimers of other class I enveloped viruses and to prepare helical tertiary structure mimetics of certain natural protein-protein interactions for biomedical applications.
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Affiliation(s)
- Wenqing Lai
- State Key Laboratory of Toxicology and Medical Countermeasures , Beijing Institute of Pharmacology & Toxicology , 27 Tai-Ping Road , Beijing , 100850 , China . ; ; Tel: +86-10-6816-9363
| | - Chao Wang
- State Key Laboratory of Toxicology and Medical Countermeasures , Beijing Institute of Pharmacology & Toxicology , 27 Tai-Ping Road , Beijing , 100850 , China . ; ; Tel: +86-10-6816-9363
| | - Fei Yu
- Key Laboratory of Medical Molecular Virology of Ministries of Education and Health , Shanghai Medical College , Shanghai Public Health Clinical Center , Fudan University , Shanghai 200032 , China . ; ; Tel: +86-21-54237673
| | - Lu Lu
- Key Laboratory of Medical Molecular Virology of Ministries of Education and Health , Shanghai Medical College , Shanghai Public Health Clinical Center , Fudan University , Shanghai 200032 , China . ; ; Tel: +86-21-54237673
| | - Qian Wang
- Key Laboratory of Medical Molecular Virology of Ministries of Education and Health , Shanghai Medical College , Shanghai Public Health Clinical Center , Fudan University , Shanghai 200032 , China . ; ; Tel: +86-21-54237673
| | - Xifeng Jiang
- State Key Laboratory of Toxicology and Medical Countermeasures , Beijing Institute of Pharmacology & Toxicology , 27 Tai-Ping Road , Beijing , 100850 , China . ; ; Tel: +86-10-6816-9363
| | - Xiaoyu Xu
- State Key Laboratory of Toxicology and Medical Countermeasures , Beijing Institute of Pharmacology & Toxicology , 27 Tai-Ping Road , Beijing , 100850 , China . ; ; Tel: +86-10-6816-9363
| | - Tianhong Zhang
- State Key Laboratory of Toxicology and Medical Countermeasures , Beijing Institute of Pharmacology & Toxicology , 27 Tai-Ping Road , Beijing , 100850 , China . ; ; Tel: +86-10-6816-9363
| | - Shengming Wu
- National Center of Biomedical Analysis , 27 Tai-Ping Road , Beijing , 100850 , China
| | - Xi Zheng
- State Key Laboratory of Toxicology and Medical Countermeasures , Beijing Institute of Pharmacology & Toxicology , 27 Tai-Ping Road , Beijing , 100850 , China . ; ; Tel: +86-10-6816-9363
| | - Zhenqing Zhang
- State Key Laboratory of Toxicology and Medical Countermeasures , Beijing Institute of Pharmacology & Toxicology , 27 Tai-Ping Road , Beijing , 100850 , China . ; ; Tel: +86-10-6816-9363
| | - Fangting Dong
- National Center of Biomedical Analysis , 27 Tai-Ping Road , Beijing , 100850 , China
| | - Shibo Jiang
- Key Laboratory of Medical Molecular Virology of Ministries of Education and Health , Shanghai Medical College , Shanghai Public Health Clinical Center , Fudan University , Shanghai 200032 , China . ; ; Tel: +86-21-54237673
- Lindsley F. Kimball Research Institute , New York Blood Center , New York , NY 10065 , USA
| | - Keliang Liu
- State Key Laboratory of Toxicology and Medical Countermeasures , Beijing Institute of Pharmacology & Toxicology , 27 Tai-Ping Road , Beijing , 100850 , China . ; ; Tel: +86-10-6816-9363
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Miller CR, Johnson EL, Burke AZ, Martin KP, Miura TA, Wichman HA, Brown CJ, Ytreberg FM. Initiating a watch list for Ebola virus antibody escape mutations. PeerJ 2016; 4:e1674. [PMID: 26925318 PMCID: PMC4768679 DOI: 10.7717/peerj.1674] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Accepted: 01/18/2016] [Indexed: 12/26/2022] Open
Abstract
The 2014 Ebola virus (EBOV) outbreak in West Africa is the largest in recorded history and resulted in over 11,000 deaths. It is essential that strategies for treatment and containment be developed to avoid future epidemics of this magnitude. With the development of vaccines and antibody-based therapies using the envelope glycoprotein (GP) of the 1976 Mayinga strain, one important strategy is to anticipate how the evolution of EBOV might compromise these efforts. In this study we have initiated a watch list of potential antibody escape mutations of EBOV by modeling interactions between GP and the antibody KZ52. The watch list was generated using molecular modeling to estimate stability changes due to mutation. Every possible mutation of GP was considered and the list was generated from those that are predicted to disrupt GP-KZ52 binding but not to disrupt the ability of GP to fold and to form trimers. The resulting watch list contains 34 mutations (one of which has already been seen in humans) at six sites in the GP2 subunit. Should mutations from the watch list appear and spread during an epidemic, it warrants attention as these mutations may reflect an evolutionary response from the virus that could reduce the effectiveness of interventions such as vaccination. However, this watch list is incomplete and emphasizes the need for more experimental structures of EBOV interacting with antibodies in order to expand the watch list to other epitopes. We hope that this work provokes experimental research on evolutionary escape in both Ebola and other viral pathogens.
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Affiliation(s)
- Craig R Miller
- Department of Biological Sciences, University of Idaho, Moscow, ID, United States; Department of Mathematics, University of Idaho, Moscow, ID, United States; Center for Modeling Complex Interactions, University of Idaho, Moscow, ID, United States; Institute for Bioinformatics and Evolutionary Studies, University of Idaho, Moscow, ID, United States
| | - Erin L Johnson
- Center for Modeling Complex Interactions, University of Idaho , Moscow, ID , United States
| | - Aran Z Burke
- Center for Modeling Complex Interactions, University of Idaho, Moscow, ID, United States; Department of Physics, University of Idaho, Moscow, ID, United States
| | - Kyle P Martin
- Center for Modeling Complex Interactions, University of Idaho, Moscow, ID, United States; Department of Physics, University of Idaho, Moscow, ID, United States
| | - Tanya A Miura
- Department of Biological Sciences, University of Idaho, Moscow, ID, United States; Center for Modeling Complex Interactions, University of Idaho, Moscow, ID, United States
| | - Holly A Wichman
- Department of Biological Sciences, University of Idaho, Moscow, ID, United States; Center for Modeling Complex Interactions, University of Idaho, Moscow, ID, United States; Institute for Bioinformatics and Evolutionary Studies, University of Idaho, Moscow, ID, United States
| | - Celeste J Brown
- Department of Biological Sciences, University of Idaho, Moscow, ID, United States; Center for Modeling Complex Interactions, University of Idaho, Moscow, ID, United States; Institute for Bioinformatics and Evolutionary Studies, University of Idaho, Moscow, ID, United States
| | - F Marty Ytreberg
- Center for Modeling Complex Interactions, University of Idaho, Moscow, ID, United States; Institute for Bioinformatics and Evolutionary Studies, University of Idaho, Moscow, ID, United States; Department of Physics, University of Idaho, Moscow, ID, United States
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Miao C, Li M, Zheng YM, Cohen FS, Liu SL. Cell-cell contact promotes Ebola virus GP-mediated infection. Virology 2015; 488:202-15. [PMID: 26655238 DOI: 10.1016/j.virol.2015.11.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Revised: 11/18/2015] [Accepted: 11/19/2015] [Indexed: 10/22/2022]
Abstract
Ebola virus (EBOV) is a highly pathogenic filovirus that causes hemorrhagic fever in humans and animals. Here we provide evidence that cell-cell contact promotes infection mediated by the glycoprotein (GP) of EBOV. Interestingly, expression of EBOV GP alone, even in the absence of retroviral Gag-Pol, is sufficient to transfer a retroviral vector encoding Tet-off from cell to cell. Cell-to-cell infection mediated by EBOV GP is blocked by inhibitors of actin polymerization, but appears to be less sensitive to KZ52 neutralization. Treatment of co-cultured cells with cathepsin B/L inhibitors, or an entry inhibitor 3.47 that targets the receptor NPC1 for virus binding, also blocks cell-to-cell infection. Cell-cell contact also enhances spread of rVSV bearing GP in monocytes and macrophages, the primary targets of natural EBOV infection. Altogether, our study reveals that cell-cell contact promotes EBOV GP-mediated infection, and provides new insight into understanding EBOV spread and viral pathogenesis.
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Affiliation(s)
- Chunhui Miao
- Department of Molecular Microbiology and Immunology, Bond Life Sciences Center, University of Missouri, Columbia, MO 65211, USA
| | - Minghua Li
- Department of Molecular Microbiology and Immunology, Bond Life Sciences Center, University of Missouri, Columbia, MO 65211, USA
| | - Yi-Min Zheng
- Department of Molecular Microbiology and Immunology, Bond Life Sciences Center, University of Missouri, Columbia, MO 65211, USA
| | - Fredric S Cohen
- Department of Molecular Biophysics and Physiology, Rush University Medical Center, Chicago, IL 60612, USA
| | - Shan-Lu Liu
- Department of Molecular Microbiology and Immunology, Bond Life Sciences Center, University of Missouri, Columbia, MO 65211, USA.
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The heptad repeat region is a major selection target in MERS-CoV and related coronaviruses. Sci Rep 2015; 5:14480. [PMID: 26404138 PMCID: PMC4585914 DOI: 10.1038/srep14480] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2015] [Accepted: 09/01/2015] [Indexed: 01/08/2023] Open
Abstract
Middle East respiratory syndrome coronavirus (MERS-CoV) originated in bats and spread to humans via zoonotic transmission from camels. We analyzed the evolution of the spike (S) gene in betacoronaviruses (betaCoVs) isolated from different mammals, in bat coronavirus populations, as well as in MERS-CoV strains from the current outbreak. Results indicated several positively selected sites located in the region comprising the two heptad repeats (HR1 and HR2) and their linker. Two sites (R652 and V1060) were positively selected in the betaCoVs phylogeny and correspond to mutations associated with expanded host range in other coronaviruses. During the most recent evolution of MERS-CoV, adaptive mutations in the HR1 (Q/R/H1020) arose in camels or in a previous host and spread to humans. We determined that different residues at position 1020 establish distinct inter- and intra-helical interactions and affect the stability of the six-helix bundle formed by the HRs. A similar effect on stability was observed for a nearby mutation (T1015N) that increases MERS-CoV infection efficiency in vitro. Data herein indicate that the heptad repeat region was a major target of adaptive evolution in MERS-CoV-related viruses; these results are relevant for the design of fusion inhibitor peptides with antiviral function.
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Clinton TR, Weinstock MT, Jacobsen MT, Szabo-Fresnais N, Pandya MJ, Whitby FG, Herbert AS, Prugar LI, McKinnon R, Hill CP, Welch BD, Dye JM, Eckert DM, Kay MS. Design and characterization of ebolavirus GP prehairpin intermediate mimics as drug targets. Protein Sci 2015; 24:446-63. [PMID: 25287718 PMCID: PMC4380977 DOI: 10.1002/pro.2578] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2014] [Accepted: 10/01/2014] [Indexed: 01/07/2023]
Abstract
Ebolaviruses are highly lethal filoviruses that cause hemorrhagic fever in humans and nonhuman primates. With no approved treatments or preventatives, the development of an anti-ebolavirus therapy to protect against natural infections and potential weaponization is an urgent global health need. Here, we describe the design, biophysical characterization, and validation of peptide mimics of the ebolavirus N-trimer, a highly conserved region of the GP2 fusion protein, to be used as targets to develop broad-spectrum inhibitors of ebolavirus entry. The N-trimer region of GP2 is 90% identical across all ebolavirus species and forms a critical part of the prehairpin intermediate that is exposed during viral entry. Specifically, we fused designed coiled coils to the N-trimer to present it as a soluble trimeric coiled coil as it appears during membrane fusion. Circular dichroism, sedimentation equilibrium, and X-ray crystallography analyses reveal the helical, trimeric structure of the designed N-trimer mimic targets. Surface plasmon resonance studies validate that the N-trimer mimic binds its native ligand, the C-peptide region of GP2. The longest N-trimer mimic also inhibits virus entry, thereby confirming binding of the C-peptide region during viral entry and the presence of a vulnerable prehairpin intermediate. Using phage display as a model system, we validate the suitability of the N-trimer mimics as drug screening targets. Finally, we describe the foundational work to use the N-trimer mimics as targets in mirror-image phage display, which will be used to identify D-peptide inhibitors of ebolavirus entry.
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Affiliation(s)
- Tracy R Clinton
- Department of Biochemistry, University of Utah School of MedicineSalt Lake City, Utah, 84112-5650
| | - Matthew T Weinstock
- Department of Biochemistry, University of Utah School of MedicineSalt Lake City, Utah, 84112-5650
| | - Michael T Jacobsen
- Department of Biochemistry, University of Utah School of MedicineSalt Lake City, Utah, 84112-5650
| | - Nicolas Szabo-Fresnais
- Department of Biochemistry, University of Utah School of MedicineSalt Lake City, Utah, 84112-5650,Cardiology Section, Department of Internal Medicine, University of Utah School of MedicineSalt Lake City, Utah, 84148
| | - Maya J Pandya
- Department of Biochemistry, University of Utah School of MedicineSalt Lake City, Utah, 84112-5650
| | - Frank G Whitby
- Department of Biochemistry, University of Utah School of MedicineSalt Lake City, Utah, 84112-5650
| | - Andrew S Herbert
- U.S. Army Medical Research Institute of Infectious Diseases, Fort DetrickFrederick, Maryland, 21702-5011
| | - Laura I Prugar
- U.S. Army Medical Research Institute of Infectious Diseases, Fort DetrickFrederick, Maryland, 21702-5011
| | - Rena McKinnon
- D-Peptide Research Division, Navigen, Inc.Salt Lake City, Utah, 84108
| | - Christopher P Hill
- Department of Biochemistry, University of Utah School of MedicineSalt Lake City, Utah, 84112-5650
| | - Brett D Welch
- D-Peptide Research Division, Navigen, Inc.Salt Lake City, Utah, 84108
| | - John M Dye
- U.S. Army Medical Research Institute of Infectious Diseases, Fort DetrickFrederick, Maryland, 21702-5011
| | - Debra M Eckert
- Department of Biochemistry, University of Utah School of MedicineSalt Lake City, Utah, 84112-5650,*Correspondence to: Debra M. Eckert; Department of Biochemistry, University of Utah School of Medicine, 15 N. Medical Drive East, Rm 4100, Salt Lake City, UT 84112. E-mail: or Michael S. Kay; Department of Biochemistry, University of Utah School of Medicine, 15 N. Medical Drive East, Rm 4100, Salt Lake City, UT 84112. E-mail:
| | - Michael S Kay
- Department of Biochemistry, University of Utah School of MedicineSalt Lake City, Utah, 84112-5650,*Correspondence to: Debra M. Eckert; Department of Biochemistry, University of Utah School of Medicine, 15 N. Medical Drive East, Rm 4100, Salt Lake City, UT 84112. E-mail: or Michael S. Kay; Department of Biochemistry, University of Utah School of Medicine, 15 N. Medical Drive East, Rm 4100, Salt Lake City, UT 84112. E-mail:
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Abstract
![]()
The
Ebolaviruses are members of the family Filoviridae (“filoviruses”) and cause severe hemhorragic fever
with human case fatality rates as high as 90%. Infection requires
attachment of the viral particle to cells and triggering of membrane
fusion between the host and viral membranes, a process that occurs
in the host endosome and is facilitated by the envelope glycoprotein
(GP). One potential strategy for therapeutic intervention is the development
of agents (antibodies, peptides, and small molecules) that can interfere
with viral entry aspects such as attachment, uptake, priming, or membrane
fusion. This paper highlights recent developments in the discovery
and evaluation of therapeutic entry inhibitors and identifies opportunities
moving forward.
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Affiliation(s)
- Elisabeth K. Nyakatura
- Department
of Biochemistry, Albert Einstein College of Medicine, 1300 Morris
Park Avenue, Bronx, New York 10461, United States
| | - Julia C. Frei
- Department
of Biochemistry, Albert Einstein College of Medicine, 1300 Morris
Park Avenue, Bronx, New York 10461, United States
| | - Jonathan R. Lai
- Department
of Biochemistry, Albert Einstein College of Medicine, 1300 Morris
Park Avenue, Bronx, New York 10461, United States
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Xia S, Liu Q, Wang Q, Sun Z, Su S, Du L, Ying T, Lu L, Jiang S. Middle East respiratory syndrome coronavirus (MERS-CoV) entry inhibitors targeting spike protein. Virus Res 2014; 194:200-10. [PMID: 25451066 PMCID: PMC7114414 DOI: 10.1016/j.virusres.2014.10.007] [Citation(s) in RCA: 85] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2014] [Revised: 10/06/2014] [Accepted: 10/06/2014] [Indexed: 01/04/2023]
Abstract
The recent outbreak of Middle East respiratory syndrome (MERS) coronavirus (MERS-CoV) infection has led to more than 800 laboratory-confirmed MERS cases with a high case fatality rate (∼35%), posing a serious threat to global public health and calling for the development of effective and safe therapeutic and prophylactic strategies to treat and prevent MERS-CoV infection. Here we discuss the most recent studies on the structure of the MERS-CoV spike protein and its role in virus binding and entry, and the development of MERS-CoV entry/fusion inhibitors targeting the S1 subunit, particularly the receptor-binding domain (RBD), and the S2 subunit, especially the HR1 region, of the MERS-CoV spike protein. We then look ahead to future applications of these viral entry/fusion inhibitors, either alone or in combination with specific and nonspecific MERS-CoV replication inhibitors, for the treatment and prevention of MERS-CoV infection.
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Affiliation(s)
- Shuai Xia
- Key Lab of Medical Molecular Virology of MOE/MOH, Shanghai Medical College, Fudan University, 130 Dong An Road, Xuhui District, Shanghai 200032, China
| | - Qi Liu
- Key Lab of Medical Molecular Virology of MOE/MOH, Shanghai Medical College, Fudan University, 130 Dong An Road, Xuhui District, Shanghai 200032, China; Department of Medical Microbiology and Immunology, School of Basic Medicine, Dali University, Dali 671000, China
| | - Qian Wang
- Key Lab of Medical Molecular Virology of MOE/MOH, Shanghai Medical College, Fudan University, 130 Dong An Road, Xuhui District, Shanghai 200032, China
| | - Zhiwu Sun
- Key Lab of Medical Molecular Virology of MOE/MOH, Shanghai Medical College, Fudan University, 130 Dong An Road, Xuhui District, Shanghai 200032, China
| | - Shan Su
- Key Lab of Medical Molecular Virology of MOE/MOH, Shanghai Medical College, Fudan University, 130 Dong An Road, Xuhui District, Shanghai 200032, China
| | - Lanying Du
- Lindsley F. Kimball Research Institute, New York Blood Center, New York, NY 10065, USA
| | - Tianlei Ying
- Key Lab of Medical Molecular Virology of MOE/MOH, Shanghai Medical College, Fudan University, 130 Dong An Road, Xuhui District, Shanghai 200032, China
| | - Lu Lu
- Key Lab of Medical Molecular Virology of MOE/MOH, Shanghai Medical College, Fudan University, 130 Dong An Road, Xuhui District, Shanghai 200032, China.
| | - Shibo Jiang
- Key Lab of Medical Molecular Virology of MOE/MOH, Shanghai Medical College, Fudan University, 130 Dong An Road, Xuhui District, Shanghai 200032, China; Lindsley F. Kimball Research Institute, New York Blood Center, New York, NY 10065, USA.
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Inhibition of arenavirus infection by a glycoprotein-derived peptide with a novel mechanism. J Virol 2014; 88:8556-64. [PMID: 24850726 DOI: 10.1128/jvi.01133-14] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
UNLABELLED The family Arenaviridae includes a number of viruses of public health importance, such as the category A hemorrhagic fever viruses Lassa virus, Junin virus, Machupo virus, Guanarito virus, and Sabia virus. Current chemotherapy for arenavirus infection is limited to the nucleoside analogue ribavirin, which is characterized by considerable toxicity and treatment failure. Using Pichinde virus as a model arenavirus, we attempted to design glycoprotein-derived fusion inhibitors similar to the FDA-approved anti-HIV peptide enfuvirtide. We have identified a GP2-derived peptide, AVP-p, with antiviral activity and no acute cytotoxicity. The 50% inhibitory dose (IC50) for the peptide is 7 μM, with complete inhibition of viral plaque formation at approximately 20 μM, and its antiviral activity is largely sequence dependent. AVP-p demonstrates activity against viruses with the Old and New World arenavirus viral glycoprotein complex but not against enveloped viruses of other families. Unexpectedly, fusion assays reveal that the peptide induces virus-liposome fusion at neutral pH and that the process is strictly glycoprotein mediated. As observed in cryo-electron micrographs, AVP-p treatment causes morphological changes consistent with fusion protein activation in virions, including the disappearance of prefusion glycoprotein spikes and increased particle diameters, and fluorescence microscopy shows reduced binding by peptide-treated virus. Steady-state fluorescence anisotropy measurements suggest that glycoproteins are destabilized by peptide-induced alterations in viral membrane order. We conclude that untimely deployment of fusion machinery by the peptide could render virions less able to engage in on-pathway receptor binding or endosomal fusion. AVP-p may represent a potent, highly specific, novel therapeutic strategy for arenavirus infection. IMPORTANCE Because the only drug available to combat infection by Lassa virus, a highly pathogenic arenavirus, is toxic and prone to treatment failure, we identified a peptide, AVP-p, derived from the fusion glycoprotein of a nonpathogenic model arenavirus, which demonstrates antiviral activity and no acute cytotoxicity. AVP-p is unique among self-derived inhibitory peptides in that it shows broad, specific activity against pseudoviruses bearing Old and New World arenavirus glycoproteins but not against viruses from other families. Further, the peptide's mechanism of action is highly novel. Biochemical assays and cryo-electron microscopy indicate that AVP-p induces premature activation of viral fusion proteins through membrane perturbance. Peptide treatment, however, does not increase the infectivity of cell-bound virus. We hypothesize that prematurely activated virions are less fit for receptor binding and membrane fusion and that AVP-p may represent a viable therapeutic strategy for arenavirus infection.
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Paragas J, Geisbert TW. Development of treatment strategies to combat Ebola and Marburg viruses. Expert Rev Anti Infect Ther 2014; 4:67-76. [PMID: 16441210 DOI: 10.1586/14787210.4.1.67] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Ebola and Marburg viruses are emerging/re-emerging pathogens that pose a significant threat to human health. These naturally occurring viral infections frequently cause a lethal hemorrhagic fever in humans and nonhuman primates. The disastrous consequences of infection with these viruses have been pursued as potential biological weapons. To date, there are no therapeutic options available for the prophylaxis or treatment of infected individuals. The recognition that Ebola and Marburg viruses may be exploited as biological weapons has resulted in major efforts to develop modalities to counter infection. In this review, select technologies and approaches will be highlighted as part of the critical path for the development of therapeutics to ameliorate the invariably devastating outcomes of human filoviral infections.
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Affiliation(s)
- Jason Paragas
- Virology Division, US Army Medical Research Institute of Infectious Diseases, Fort Detrick, MD 21702-5011, USA.
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Peptides corresponding to the predicted heptad repeat 2 domain of the feline coronavirus spike protein are potent inhibitors of viral infection. PLoS One 2013; 8:e82081. [PMID: 24312629 PMCID: PMC3849439 DOI: 10.1371/journal.pone.0082081] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2013] [Accepted: 10/30/2013] [Indexed: 02/05/2023] Open
Abstract
Background Feline infectious peritonitis (FIP) is a lethal immune-mediated disease caused by feline coronavirus (FCoV). Currently, no therapy with proven efficacy is available. In searching for agents that may prove clinically effective against FCoV infection, five analogous overlapping peptides were designed and synthesized based on the putative heptad repeat 2 (HR2) sequence of the spike protein of FCoV, and the antiviral efficacy was evaluated. Methods Plaque reduction assay and MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) cytotoxicity assay were performed in this study. Peptides were selected using a plaque reduction assay to inhibit Feline coronavirus infection. Results The results demonstrated that peptide (FP5) at concentrations below 20 μM inhibited viral replication by up to 97%. The peptide (FP5) exhibiting the most effective antiviral effect was further combined with a known anti-viral agent, human interferon-α (IFN-α), and a significant synergistic antiviral effect was observed. Conclusion Our data suggest that the synthetic peptide FP5 could serve as a valuable addition to the current FIP prevention methods.
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Structure of the fusion core and inhibition of fusion by a heptad repeat peptide derived from the S protein of Middle East respiratory syndrome coronavirus. J Virol 2013; 87:13134-40. [PMID: 24067982 DOI: 10.1128/jvi.02433-13] [Citation(s) in RCA: 122] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Middle East respiratory syndrome coronavirus (MERS-CoV) recently emerged as a severe worldwide public health concern. The virus is highly pathogenic, manifesting in infected patients with an approximately 50% fatality rate. It is known that the surface spike (S) proteins of coronaviruses mediate receptor recognition and membrane fusion, thereby playing an indispensable role in initiating infection. In this process, heptad repeats 1 and 2 (HR1 and HR2) of the S protein assemble into a complex called the fusion core, which represents a key membrane fusion architecture. To date, however, the MERS-CoV fusion core remains uncharacterized. In this study, we performed a series of biochemical and biophysical analyses characterizing the HR1/HR2 complexes of this novel virus. The HR sequences were variably truncated and then connected with a flexible amino acid linker. In each case, the recombinant protein automatically assembled into a trimer in solution, displaying a typical α-helical structure. One of these trimers was successfully crystallized, and its structure was solved at a resolution of 1.9 Å. A canonical 6-helix bundle, like those reported for other coronaviruses, was revealed, with three HR1 helices forming the central coiled-coil core and three HR2 chains surrounding the core in the HR1 side grooves. This demonstrates that MERS-CoV utilizes a mechanism similar to those of other class I enveloped viruses for membrane fusion. With this notion, we further identified an HR2-based peptide that could potently inhibit MERS-CoV fusion and entry by using a pseudotyped-virus system. These results lay the groundwork for future inhibitory peptidic drug design.
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Bhattacharyya S, Mulherkar N, Chandran K. Endocytic pathways involved in filovirus entry: advances, implications and future directions. Viruses 2013; 4:3647-64. [PMID: 23342373 PMCID: PMC3528284 DOI: 10.3390/v4123647] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Detailed knowledge of the host-virus interactions that accompany filovirus entry into cells is expected to identify determinants of viral virulence and host range, and to yield targets for the development of antiviral therapeutics. While it is generally agreed that filovirus entry into the host cytoplasm requires viral internalization into acidic endosomal compartments and proteolytic cleavage of the envelope glycoprotein by endo/lysosomal cysteine proteases, our understanding of the specific endocytic pathways co-opted by filoviruses remains limited. This review addresses the current knowledge on cellular endocytic pathways implicated in filovirus entry, highlights the consensus as well as controversies, and discusses important remaining questions.
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Affiliation(s)
- Suchita Bhattacharyya
- Department of Atomic Energy-Centre for Excellence in Basic Sciences, University of Mumbai, Health Centre Building, Vidyanagari, Kalina, Santacruz East, Mumbai 400098, India; E-Mail:
| | - Nirupama Mulherkar
- Department of Microbiology and Immunology, Albert Einstein College of Medicine, 1300 Morris Park Ave, Bronx, NY 10461, USA; E-Mail:
| | - Kartik Chandran
- Department of Microbiology and Immunology, Albert Einstein College of Medicine, 1300 Morris Park Ave, Bronx, NY 10461, USA; E-Mail:
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +1-718-430-8851
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Abstract
Filoviruses cause severe hemorrhagic fever in humans with high case-fatality rates. The cellular factors exploited by filoviruses for their spread constitute potential targets for intervention, but are incompletely defined. The viral glycoprotein (GP) mediates filovirus entry into host cells. Recent studies revealed important insights into the host cell molecules engaged by GP for cellular entry. The binding of GP to cellular lectins was found to concentrate virions onto susceptible cells and might contribute to the early and sustained infection of macrophages and dendritic cells, important viral targets. Tyrosine kinase receptors were shown to promote macropinocytic uptake of filoviruses into a subset of susceptible cells without binding to GP, while interactions between GP and human T cell Ig mucin 1 (TIM-1) might contribute to filovirus infection of mucosal epithelial cells. Moreover, GP engagement of the cholesterol transporter Niemann-Pick C1 was demonstrated to be essential for GP-mediated fusion of the viral envelope with a host cell membrane. Finally, mutagenic and structural analyses defined GP domains which interact with these host cell factors. Here, we will review the recent progress in elucidating the molecular interactions underlying filovirus entry and discuss their implications for our understanding of the viral cell tropism.
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A mutation in the Ebola virus envelope glycoprotein restricts viral entry in a host species- and cell-type-specific manner. J Virol 2013; 87:3324-34. [PMID: 23302883 DOI: 10.1128/jvi.01598-12] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Zaire Ebola virus (EBOV) is a zoonotic pathogen that causes severe hemorrhagic fever in humans. A single viral glycoprotein (GP) mediates viral attachment and entry. Here, virus-like particle (VLP)-based entry assays demonstrate that a GP mutant, GP-F88A, which is defective for entry into a variety of human cell types, including antigen-presenting cells (APCs), such as macrophages and dendritic cells, can mediate viral entry into mouse CD11b(+) APCs. Like that of wild-type GP (GP-wt), GP-F88A-mediated entry occurs via a macropinocytosis-related pathway and requires endosomal cysteine proteases and an intact fusion peptide. Several additional hydrophobic residues lie in close proximity to GP-F88, including L111, I113, L122, and F225. GP mutants in which these residues are mutated to alanine displayed preferential and often impaired entry into several cell types, although not in a species-specific manner. Niemann-Pick C1 (NPC1) protein is an essential filovirus receptor that binds directly to GP. Overexpression of NPC1 was recently demonstrated to rescue GP-F88A-mediated entry. A quantitative enzyme-linked immunosorbent assay (ELISA) demonstrated that while the F88A mutation impairs GP binding to human NPC1 by 10-fold, it has little impact on GP binding to mouse NPC1. Interestingly, not all mouse macrophage cell lines permit GP-F88A entry. The IC-21 cell line was permissive, whereas RAW 264.7 cells were not. Quantitative reverse transcription (RT)-PCR assays demonstrate higher NPC1 levels in GP-F88A permissive IC-21 cells and mouse peritoneal macrophages than in RAW 264.7 cells. Cumulatively, these studies suggest an important role for NPC1 in the differential entry of GP-F88A into mouse versus human APCs.
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AMP-activated protein kinase is required for the macropinocytic internalization of ebolavirus. J Virol 2012; 87:746-55. [PMID: 23115293 DOI: 10.1128/jvi.01634-12] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Identification of host factors that are needed for Zaire Ebolavirus (EBOV) entry provides insights into the mechanism(s) of filovirus uptake, and these factors may serve as potential antiviral targets. In order to identify novel host genes and pathways involved in EBOV entry, gene array findings in the National Cancer Institute's NCI-60 panel of human tumor cell lines were correlated with permissivity for EBOV glycoprotein (GP)-mediated entry. We found that the gene encoding the γ2 subunit of AMP-activated protein kinase (AMPK) strongly correlated with EBOV transduction in the tumor panel. The AMPK inhibitor compound C inhibited infectious EBOV replication in Vero cells and diminished EBOV GP-dependent, but not Lassa fever virus GPC-dependent, entry into a variety of cell lines in a dose-dependent manner. Compound C also prevented EBOV GP-mediated infection of primary human macrophages, a major target of filoviral replication in vivo. Consistent with a role for AMPK in filovirus entry, time-of-addition studies demonstrated that compound C abrogated infection when it was added at early time points but became progressively less effective when added later. Compound C prevented EBOV pseudovirion internalization at 37°C as cell-bound particles remained susceptible to trypsin digestion in the presence of the inhibitor but not in its absence. Mouse embryonic fibroblasts lacking the AMPKα1 and AMPKα2 catalytic subunits were significantly less permissive to EBOV GP-mediated infection than their wild-type counterparts, likely due to decreased macropinocytic uptake. In total, these findings implicate AMPK in macropinocytic events needed for EBOV GP-dependent entry and identify a novel cellular target for new filoviral antivirals.
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Martinez O, Leung LW, Basler CF. The role of antigen-presenting cells in filoviral hemorrhagic fever: gaps in current knowledge. Antiviral Res 2012; 93:416-28. [PMID: 22333482 PMCID: PMC3299938 DOI: 10.1016/j.antiviral.2012.01.011] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2011] [Revised: 01/26/2012] [Accepted: 01/30/2012] [Indexed: 12/01/2022]
Abstract
The filoviruses, Ebola virus (EBOV) and Marburg virus (MARV), are highly lethal zoonotic agents of concern as emerging pathogens and potential bioweapons. Antigen-presenting cells (APCs), particularly macrophages and dendritic cells, are targets of filovirus infection in vivo. Infection of these cell types has been proposed to contribute to the inflammation, activation of coagulation cascades and ineffective immune responses characteristic of filovirus hemorrhagic fever. However, many aspects of filovirus–APC interactions remain to be clarified. Among the unanswered questions: What determines the ability of filoviruses to replicate in different APC subsets? What are the cellular signaling pathways that sense infection and lead to production of copious quantities of cytokines, chemokines and tissue factor? What are the mechanisms by which innate antiviral responses are disabled by these viruses, and how may these mechanisms contribute to inadequate adaptive immunity? A better understanding of these issues will clarify the pathogenesis of filoviral hemorrhagic fever and provide new avenues for development of therapeutics.
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Affiliation(s)
- Osvaldo Martinez
- Department of Microbiology, Mount Sinai School of Medicine, New York, NY 10029, USA
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Filovirus entry: a novelty in the viral fusion world. Viruses 2012; 4:258-75. [PMID: 22470835 PMCID: PMC3315215 DOI: 10.3390/v4020258] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2011] [Revised: 01/24/2012] [Accepted: 01/30/2012] [Indexed: 12/18/2022] Open
Abstract
Ebolavirus (EBOV) and Marburgvirus (MARV) that compose the filovirus family of negative strand RNA viruses infect a broad range of mammalian cells. Recent studies indicate that cellular entry of this family of viruses requires a series of cellular protein interactions and molecular mechanisms, some of which are unique to filoviruses and others are commonly used by all viral glycoproteins. Details of this entry pathway are highlighted here. Virus entry into cells is initiated by the interaction of the viral glycoprotein(1) subunit (GP(1)) with both adherence factors and one or more receptors on the surface of host cells. On epithelial cells, we recently demonstrated that TIM-1 serves as a receptor for this family of viruses, but the cell surface receptors in other cell types remain unidentified. Upon receptor binding, the virus is internalized into endosomes primarily via macropinocytosis, but perhaps by other mechanisms as well. Within the acidified endosome, the heavily glycosylated GP(1) is cleaved to a smaller form by the low pH-dependent cellular proteases Cathepsin L and B, exposing residues in the receptor binding site (RBS). Details of the molecular events following cathepsin-dependent trimming of GP(1) are currently incomplete; however, the processed GP(1) specifically interacts with endosomal/lysosomal membranes that contain the Niemann Pick C1 (NPC1) protein and expression of NPC1 is required for productive infection, suggesting that GP/NPC1 interactions may be an important late step in the entry process. Additional events such as further GP(1) processing and/or reducing events may also be required to generate a fusion-ready form of the glycoprotein. Once this has been achieved, sequences in the filovirus GP(2) subunit mediate viral/cellular membrane fusion via mechanisms similar to those previously described for other enveloped viruses. This multi-step entry pathway highlights the complex and highly orchestrated path of internalization and fusion that appears unique for filoviruses.
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Hu L, Trefethen JM, Zeng Y, Yee L, Ohtake S, Lechuga‐Ballesteros D, Warfield KL, Aman MJ, Shulenin S, Unfer R, Enterlein SG, Truong‐Le V, Volkin DB, Joshi SB, Middaugh CR. Biophysical Characterization and Conformational Stability of Ebola and Marburg Virus-Like Particles. J Pharm Sci 2011; 100:5156-73. [DOI: 10.1002/jps.22724] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2011] [Revised: 07/01/2011] [Accepted: 07/13/2011] [Indexed: 11/11/2022]
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Ebolavirus delta-peptide immunoadhesins inhibit marburgvirus and ebolavirus cell entry. J Virol 2011; 85:8502-13. [PMID: 21697477 DOI: 10.1128/jvi.02600-10] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
With the exception of Reston and Lloviu viruses, filoviruses (marburgviruses, ebolaviruses, and "cuevaviruses") cause severe viral hemorrhagic fevers in humans. Filoviruses use a class I fusion protein, GP(1,2), to bind to an unknown, but shared, cell surface receptor to initiate virus-cell fusion. In addition to GP(1,2), ebolaviruses and cuevaviruses, but not marburgviruses, express two secreted glycoproteins, soluble GP (sGP) and small soluble GP (ssGP). All three glycoproteins have identical N termini that include the receptor-binding region (RBR) but differ in their C termini. We evaluated the effect of the secreted ebolavirus glycoproteins on marburgvirus and ebolavirus cell entry, using Fc-tagged recombinant proteins. Neither sGP-Fc nor ssGP-Fc bound to filovirus-permissive cells or inhibited GP(1,2)-mediated cell entry of pseudotyped retroviruses. Surprisingly, several Fc-tagged Δ-peptides, which are small C-terminal cleavage products of sGP secreted by ebolavirus-infected cells, inhibited entry of retroviruses pseudotyped with Marburg virus GP(1,2), as well as Marburg virus and Ebola virus infection in a dose-dependent manner and at low molarity despite absence of sequence similarity to filovirus RBRs. Fc-tagged Δ-peptides from three ebolaviruses (Ebola virus, Sudan virus, and Taï Forest virus) inhibited GP(1,2)-mediated entry and infection of viruses comparably to or better than the Fc-tagged RBRs, whereas the Δ-peptide-Fc of an ebolavirus nonpathogenic for humans (Reston virus) and that of an ebolavirus with lower lethality for humans (Bundibugyo virus) had little effect. These data indicate that Δ-peptides are functional components of ebolavirus proteomes. They join cathepsins and integrins as novel modulators of filovirus cell entry, might play important roles in pathogenesis, and could be exploited for the synthesis of powerful new antivirals.
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