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Jia Y, Li F, Liu Z, Liu S, Huang M, Gao X, Su X, Wang Z, Wang T. Interaction between the SFTSV envelope glycoprotein Gn and STING inhibits the formation of the STING-TBK1 complex and suppresses the NF-κB signaling pathway. J Virol 2024; 98:e0181523. [PMID: 38421179 PMCID: PMC10949458 DOI: 10.1128/jvi.01815-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Accepted: 02/11/2024] [Indexed: 03/02/2024] Open
Abstract
Severe fever with thrombocytopenia syndrome virus (SFTSV) is an emerging tick-borne bunyavirus with high pathogenicity. There has been a gradual increase in the number of reported cases in recent years, with high morbidity and mortality rates. The cyclic GMP-AMP synthase (cGAS)-stimulator of interferon genes (STING) signaling pathway plays an important role in the innate immune defense activated by viral infection; however, the role of the cGAS-STING signaling pathway during SFTSV infection is still unclear. In this study, we investigated the relationship between SFTSV infection and cGAS-STING signaling. We found that SFTSV infection caused the release of mitochondrial DNA into the cytoplasm and inhibits downstream innate immune signaling pathways by activating the cytoplasmic DNA receptor cGAS. We found that the SFTSV envelope glycoprotein Gn was a potent inhibitor of the cGAS-STING pathway and blocked the nuclear accumulation of interferon regulatory factor 3 and p65 to inhibit downstream innate immune signaling. Gn of SFTSV interacted with STING to inhibit STING dimerization and inhibited K27-ubiquitin modification of STING to disrupt the assembly of the STING-TANK-binding kinase 1 complex and downstream signaling. In addition, Gn was found to be involved in inducing STING degradation, further inhibiting the downstream immune response. In conclusion, this study identified the important role of the glycoprotein Gn in the antiviral innate immune response and revealed a novel mechanism of immune escape for SFTSV. Moreover, this study increases the understanding of the pathogenic mechanism of SFTSV and provides new insights for further treatment of SFTS. IMPORTANCE Severe fever with thrombocytopenia syndrome virus (SFTSV) is a newly discovered virus associated with severe hemorrhagic fever in humans. However, the role of the cyclic GMP-AMP synthase (cGAS)-stimulator of interferon genes (STING) signaling pathway during SFTSV infection is still unclear. We found that SFTSV infection inhibits downstream innate immune signaling pathways by activating the cytoplasmic DNA receptor cGAS. In addition, SFTSV Gn blocked the nuclear accumulation of interferon regulatory factor 3 and p65 to inhibit downstream innate immune signaling. Moreover, we determined that Gn of SFTSV inhibited K27-ubiquitin modification of STING to disrupt the assembly of the STING-TANK-binding kinase 1 complex and downstream signaling. We found that the SFTSV envelope glycoprotein Gn is a potent inhibitor of the cGAS-STING pathway. In conclusion, this study highlights the crucial function of the glycoprotein Gn in the antiviral innate immune response and reveals a new method of immune escape of SFTSV.
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Affiliation(s)
- Yupei Jia
- School of Life Sciences, Tianjin University, Tianjin, China
| | - Feifei Li
- School of Life Sciences, Tianjin University, Tianjin, China
| | - Zixiang Liu
- School of Life Sciences, Tianjin University, Tianjin, China
| | - Sihua Liu
- School of Life Sciences, Tianjin University, Tianjin, China
| | - Mengqian Huang
- School of Life Sciences, Tianjin University, Tianjin, China
| | - Xiaoning Gao
- School of Life Sciences, Tianjin University, Tianjin, China
| | - Xin Su
- School of Life Sciences, Tianjin University, Tianjin, China
| | - Zhiyun Wang
- School of Environmental Science and Engineering, Tianjin University, Tianjin, China
| | - Tao Wang
- School of Life Sciences, Tianjin University, Tianjin, China
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2
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Sano K, Kimura M, Sataka A, Hasegawa H, Tani H, Suzuki T. Characterization of antibodies targeting severe fever with thrombocytopenia syndrome virus glycoprotein Gc. Arch Virol 2024; 169:40. [PMID: 38308735 DOI: 10.1007/s00705-024-05968-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Accepted: 12/07/2023] [Indexed: 02/05/2024]
Abstract
Severe fever with thrombocytopenia syndrome (SFTS) is a hemorrhagic fever caused by SFTS virus (SFTSV), which is primarily found in East Asian countries. Despite its high mortality rate and increasing incidence, no vaccines or therapeutics have yet been approved for use against SFTS. Antibody drugs have shown promise in treating lethal infectious diseases that currently have no established treatments. In the case of SFTS, however, only a limited amount of research has been done on SFTSV-neutralizing antibodies targeting the transmembrane proteins Gn and Gc, which play critical roles in viral infection. This study focuses on the production and characterization of antibodies targeting the SFTSV Gc protein. Monoclonal antibodies against Gc were generated through immunization of mice, and their antiviral activity was evaluated. Three out of four anti-Gc antibody clones from this study demonstrated dose-dependent SFTSV neutralization activity, two of which exhibited a synergistic effect on the neutralization activity of the anti-Gn antibody clone Mab4-5. Further studies are necessary to identify key sites on the SFTSV glycoprotein and to develop novel agents as well as antibodies with diverse mechanisms of action against SFTSV.
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Affiliation(s)
- Kaori Sano
- Department of Pathology, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku, Shinjuku, Tokyo, 162-8640, Japan
- Research Center for Influenza and Respiratory Viruses, National Institute of Infectious Diseases, Musashimurayama, Tokyo, Japan
| | - Miyuki Kimura
- Department of Microbiology, Faculty of Medicine, University of Toyama, Toyama, Japan
| | - Akiko Sataka
- Department of Pathology, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku, Shinjuku, Tokyo, 162-8640, Japan
| | - Hideki Hasegawa
- Research Center for Influenza and Respiratory Viruses, National Institute of Infectious Diseases, Musashimurayama, Tokyo, Japan
| | - Hideki Tani
- Department of Microbiology, Faculty of Medicine, University of Toyama, Toyama, Japan
- Department of Virology, Toyama Institute of Health, Toyama, Japan
| | - Tadaki Suzuki
- Department of Pathology, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku, Shinjuku, Tokyo, 162-8640, Japan.
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3
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Kim D, Kim E, Kim S, Chung Y, Cho SD, Choi Y, Lai CJ, Dai X, Kang S, Kwak MJ, Cha I, Liu Z, Choi Y, Park SH, Choi YK, Jung JU. Self-assembling Gn head ferritin nanoparticle vaccine provides full protection from lethal challenge of Dabie Bandavirus in aged ferrets. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.07.19.549761. [PMID: 37503275 PMCID: PMC10370104 DOI: 10.1101/2023.07.19.549761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/29/2023]
Abstract
Dabie Bandavirus (DBV), previously known as Severe Fever with Thrombocytopenia Syndrome (SFTS) Virus, induces a characteristic thrombocytopenia with a mortality rate ranging from 12% to as high as 30%. The sero-prevalence of DBV in healthy people is not significantly different among age groups, but clinically diagnosed SFTS patients are older than ~50 years, suggesting that age is the critical risk factor for SFTS morbidity and mortality. Accordingly, our immune-competent ferret model demonstrates an age (>4 years old)-dependent DBV infection and pathogenesis that fully recapitulates human clinical manifestation. To protect the aged population from DBV-induced SFTS, vaccine should carry robust immunogenicity with high safety profile. Previous studies have shown that glycoproteins Gn/Gc are the most effective antigens for inducing both neutralizing antibody (NAb)- and T cell-mediated immunity and, thereby, protection. Here, we report the development of a protein subunit vaccine with 24-mer self-assembling ferritin (FT) nanoparticle to present DBV Gn head region (GnH) for enhanced immunogenicity. Anion exchange chromatography and size exclusion chromatography readily purified the GnH-FT nanoparticles to homogeneity with structural integrity. Mice immunized with GnH-FT nanoparticles induced robust NAb response and T-cell immunity against DBV Gn. Furthermore, aged ferrets immunized with GnH-FT nanoparticles were fully protected from DBV challenge without SFTS symptoms such as body weight loss, thrombocytopenia, leukopenia, and fatality. This study demonstrates that DBV GnH-FT nanoparticles provide an efficient vaccine efficacy in mouse and aged ferret models and should be an outstanding vaccine candidate targeted for the aged population against fatal DBV infection.
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Affiliation(s)
- Dokyun Kim
- Department of Cancer Biology, Infection Biology Program, and Global Center for Pathogen and Human Health Research, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Eunha Kim
- College of Medicine and Medical Research Institute, Chungbuk National University, Cheongju, Republic of Korea
- Zoonotic Infectious Disease Research Center, Chungbuk National University, Cheongju, Republic of Korea
- Center for Study of Emerging and Re-emerging Viruses, Korea Virus Research Institute, Institute for Basic Sciences, Daejeon, Republic of Korea
| | - Semi Kim
- College of Medicine and Medical Research Institute, Chungbuk National University, Cheongju, Republic of Korea
- Zoonotic Infectious Disease Research Center, Chungbuk National University, Cheongju, Republic of Korea
- Center for Study of Emerging and Re-emerging Viruses, Korea Virus Research Institute, Institute for Basic Sciences, Daejeon, Republic of Korea
| | - Youseung Chung
- Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
| | - Sung-Dong Cho
- Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
| | - Yunseo Choi
- Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
| | - Chih-Jen Lai
- Department of Cancer Biology, Infection Biology Program, and Global Center for Pathogen and Human Health Research, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Xinghong Dai
- Department of Physiology and Biophysics, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Seokmin Kang
- Department of Cancer Biology, Infection Biology Program, and Global Center for Pathogen and Human Health Research, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Mi-Jeong Kwak
- Department of Cancer Biology, Infection Biology Program, and Global Center for Pathogen and Human Health Research, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Inho Cha
- Department of Cancer Biology, Infection Biology Program, and Global Center for Pathogen and Human Health Research, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Ziyi Liu
- Department of Cancer Biology, Infection Biology Program, and Global Center for Pathogen and Human Health Research, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Younho Choi
- Florida Research and Innovation Center, Cleveland Clinic, Port St. Lucie, FL, USA
| | - Su-Hyung Park
- Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
| | - Young Ki Choi
- College of Medicine and Medical Research Institute, Chungbuk National University, Cheongju, Republic of Korea
- Zoonotic Infectious Disease Research Center, Chungbuk National University, Cheongju, Republic of Korea
- Center for Study of Emerging and Re-emerging Viruses, Korea Virus Research Institute, Institute for Basic Sciences, Daejeon, Republic of Korea
| | - Jae U. Jung
- Department of Cancer Biology, Infection Biology Program, and Global Center for Pathogen and Human Health Research, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
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Kim D, Lai CJ, Cha I, Kang S, Yang WS, Choi Y, Jung JU. SFTSV Gn-Head mRNA vaccine confers efficient protection against lethal viral challenge. J Med Virol 2023; 95:e29203. [PMID: 37909776 DOI: 10.1002/jmv.29203] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 10/16/2023] [Accepted: 10/17/2023] [Indexed: 11/03/2023]
Abstract
Severe fever with thrombocytopenia syndrome virus (SFTSV) is an emerging tick-borne virus, causing thrombocytopenia and hemorrhagic fever, with a fatality rate ranging from 12% to 30%. SFTSV possesses Gn and Gc glycoproteins, which are responsible for host cell receptor attachment and membrane fusion, respectively, to infect host cells. We have previously reported a protein subunit vaccine candidate (sGn-H-FT) of the SFTSV soluble Gn head region (sGn-H) fused with self-assembling ferritin (FT) nanoparticles, displaying strong protective immunogenicity. In this study, we present messenger RNA (mRNA) vaccine candidates encoding sGn-H or sGn-H-FT, both of which exhibit potent in vivo immunogenicity and protection capacity. Mice immunized with either sGn-H or sGn-H-FT mRNA lipid nanoparticle (LNP) vaccine produced strong total antibodies and neutralizing antibodies (NAbs) against sGn-H. Importantly, NAb titers remained high for an extended period. Finally, mice immunized with sGn-H or sGn-H-FT mRNA LNP vaccine were fully protected from a lethal dose of SFTSV challenge, showing no fatality. These findings underscore the promise of sGn-H and sGn-H-FT as vaccine antigen candidates capable of providing protective immunity against SFTSV infection.
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Affiliation(s)
- Dokyun Kim
- Department of Cancer Biology and Infection Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
- Global Center for Pathogen Research and Human Health, Lerner Research Institute, Cleveland Clinic, Ohio, USA
| | - Chih-Jen Lai
- Department of Cancer Biology and Infection Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
- Global Center for Pathogen Research and Human Health, Lerner Research Institute, Cleveland Clinic, Ohio, USA
| | - Inho Cha
- Department of Cancer Biology and Infection Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
- Department of Molecular Biology and Microbiology, Case Western Reserve University School of Medicine, Cleveland, Ohio, USA
| | - Seokmin Kang
- Department of Cancer Biology and Infection Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
- Global Center for Pathogen Research and Human Health, Lerner Research Institute, Cleveland Clinic, Ohio, USA
| | - Wan-Shan Yang
- Department of Cancer Biology and Infection Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
- Global Center for Pathogen Research and Human Health, Lerner Research Institute, Cleveland Clinic, Ohio, USA
| | - Younho Choi
- Florida Research and Innovation Center, Cleveland Clinic, Port St. Lucie, Florida, USA
| | - Jae U Jung
- Department of Cancer Biology and Infection Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
- Global Center for Pathogen Research and Human Health, Lerner Research Institute, Cleveland Clinic, Ohio, USA
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5
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Kim D, Kim E, Kim S, Chung Y, Lai CJ, Cha I, Cho SD, Choi Y, Dai X, Kim S, Kang S, Kwak MJ, Liu Z, Choi Y, Park SH, Choi YK, Jung JU. Self-assembling Gn head ferritin nanoparticle vaccine provides full protection from lethal challenge of Dabie bandavirus in aged ferrets. mBio 2023; 14:e0186823. [PMID: 37712692 PMCID: PMC10653821 DOI: 10.1128/mbio.01868-23] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Accepted: 07/24/2023] [Indexed: 09/16/2023] Open
Abstract
IMPORTANCE Dabie bandavirus (DBV) is an emerging tick-borne virus that causes severe fever with thrombocytopenia syndrome (SFTS) in infected patients. Human SFTS symptoms progress from fever, fatigue, and muscle pain to the depletion of white blood cells and platelets with fatality rates up to 30%. The recent spread of its vector tick to over 20 states in the United States increases the potential for outbreaks of the SFTS beyond the East Asia. Thus, the development of vaccine to control this rapidly emerging virus is a high priority. In this study, we applied self-assembling ferritin (FT) nanoparticle to enhance the immunogenicity of DBV Gn head domain (GnH) as a vaccine target. Mice immunized with the GnH-FT nanoparticle vaccine induced potent antibody responses and cellular immunity. Immunized aged ferrets were fully protected from the lethal challenge of DBV. Our study describes the GnH-FT nanoparticle vaccine candidate that provides protective immunity against the emerging DBV infection.
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Affiliation(s)
- Dokyun Kim
- Department of Cancer Biology, Infection Biology Program, and Global Center for Pathogen and Human Health Research, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Eunha Kim
- College of Medicine and Medical Research Institute, Chungbuk National University, Cheongju, Republic of Korea
- Zoonotic Infectious Disease Research Center, Chungbuk National University, Cheongju, Republic of Korea
- Center for Study of Emerging and Re-emerging Viruses, Korea Virus Research Institute, Institute for Basic Sciences, Daejeon, Republic of Korea
| | - Semi Kim
- College of Medicine and Medical Research Institute, Chungbuk National University, Cheongju, Republic of Korea
- Zoonotic Infectious Disease Research Center, Chungbuk National University, Cheongju, Republic of Korea
- Center for Study of Emerging and Re-emerging Viruses, Korea Virus Research Institute, Institute for Basic Sciences, Daejeon, Republic of Korea
| | - Youseung Chung
- Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
| | - Chih-Jen Lai
- Department of Cancer Biology, Infection Biology Program, and Global Center for Pathogen and Human Health Research, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Inho Cha
- Department of Cancer Biology, Infection Biology Program, and Global Center for Pathogen and Human Health Research, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Sung-Dong Cho
- Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
| | - Yunseo Choi
- Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
| | - Xinghong Dai
- Department of Physiology and Biophysics, Case Western Reserve University, Cleveland, Ohio, USA
| | - Stephanie Kim
- Department of Cancer Biology, Infection Biology Program, and Global Center for Pathogen and Human Health Research, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Seokmin Kang
- Department of Cancer Biology, Infection Biology Program, and Global Center for Pathogen and Human Health Research, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Mi-Jeong Kwak
- Department of Cancer Biology, Infection Biology Program, and Global Center for Pathogen and Human Health Research, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Ziyi Liu
- Department of Cancer Biology, Infection Biology Program, and Global Center for Pathogen and Human Health Research, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Younho Choi
- Florida Research and Innovation Center, Cleveland Clinic, Port St. Lucie, Florida, USA
| | - Su-Hyung Park
- Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
| | - Young Ki Choi
- College of Medicine and Medical Research Institute, Chungbuk National University, Cheongju, Republic of Korea
- Zoonotic Infectious Disease Research Center, Chungbuk National University, Cheongju, Republic of Korea
- Center for Study of Emerging and Re-emerging Viruses, Korea Virus Research Institute, Institute for Basic Sciences, Daejeon, Republic of Korea
| | - Jae U. Jung
- Department of Cancer Biology, Infection Biology Program, and Global Center for Pathogen and Human Health Research, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
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Hu Q, Zhang Y, Jiang J, Zheng A. Two Point Mutations in the Glycoprotein of SFTSV Enhance the Propagation Recombinant Vesicular Stomatitis Virus Vectors at Assembly Step. Viruses 2023; 15:800. [PMID: 36992507 PMCID: PMC10052781 DOI: 10.3390/v15030800] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2023] [Revised: 03/15/2023] [Accepted: 03/17/2023] [Indexed: 03/31/2023] Open
Abstract
Severe fever with thrombocytopenia syndrome virus (SFTSV) is an emerging tick-borne pathogen for which approved therapeutic drugs or vaccines are not available. We previously developed a recombinant vesicular stomatitis virus-based vaccine candidate (rVSV-SFTSV) by replacing the original glycoprotein with Gn/Gc from SFTSV, which conferred complete protection in a mouse model. Here, we found that two spontaneous mutations, M749T/C617R, emerged in the Gc glycoprotein during passaging that could significantly increase the titer of rVSV-SFTSV. M749T/C617R enhanced the genetic stability of rVSV-SFTSV, and no further mutations appeared after 10 passages. Using immunofluorescence analysis, we found that M749T/C617R could increase glycoprotein traffic to the plasma membrane, thus facilitating virus assembly. Remarkably, the broad-spectrum immunogenicity of rVSV-SFTSV was not affected by the M749T/C617R mutations. Overall, M749T/C617R could enhance the further development of rVSV-SFTSV into an effective vaccine in the future.
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Affiliation(s)
- Qiang Hu
- College of Life Science, Hebei University, Baoding 071002, China
| | - Yuhang Zhang
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
- CAS Center for Excellence in Biotic Interactions, University of Chinese Academy of Sciences, Beijing 100101, China
| | - Jiafu Jiang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China
| | - Aihua Zheng
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
- CAS Center for Excellence in Biotic Interactions, University of Chinese Academy of Sciences, Beijing 100101, China
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7
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Xia T, Wu X, Hong E, Jung K, Lai CJ, Kwak MJ, Seo H, Kim S, Jiang Z, Cha I, Jung JU. Glucosylceramide is essential for Heartland and Dabie bandavirus glycoprotein-induced membrane fusion. PLoS Pathog 2023; 19:e1011232. [PMID: 36920967 PMCID: PMC10016662 DOI: 10.1371/journal.ppat.1011232] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Accepted: 02/22/2023] [Indexed: 03/16/2023] Open
Abstract
Due to climate changes, there has been a large expansion of emerging tick-borne zoonotic viruses, including Heartland bandavirus (HRTV) and Dabie bandavirus (DBV). As etiologic agents of hemorrhagic fever with high fatality, HRTV and DBV have been recognized as dangerous viral pathogens that likely cause future wide epidemics. Despite serious health concerns, the mechanisms underlying viral infection are largely unknown. HRTV and DBV Gn and Gc are viral surface glycoproteins required for early entry events during infection. Glycosphingolipids, including galactosylceramide (GalCer), glucosylceramide (GlcCer) and lactosylceramide (LacCer), are a class of membrane lipids that play essential roles in membrane structure and viral lifecycle. Here, our genome-wide CRISPR/Cas9 knockout screen identifies that glycosphingolipid biosynthesis pathway is essential for HRTV and DBV infection. The deficiency of UDP-glucose ceramide glucosyltransferase (UGCG) that produces GlcCer resulted in the loss of infectivity of recombinant viruses pseudotyped with HRTV or DBV Gn/Gc glycoproteins. Conversely, exogenous supplement of GlcCer, but not GalCer or LacCer, recovered viral entry of UGCG-deficient cells in a dose-dependent manner. Biophysical analyses showed that GlcCer targeted the lipid-head-group binding pocket of Gc to form a stable protein-lipid complex, which allowed the insertion of Gc protein into host lysosomal membrane lipid bilayers for viral fusion. Mutagenesis showed that D841 residue at the Gc lipid binding pocket was critical for GlcCer interaction and thereby, viral entry. These findings reveal detailed mechanism of GlcCer glycosphingolipid in HRTV and DBV Gc-mediated membrane fusion and provide a potential therapeutic target for tickborne virus infection.
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Affiliation(s)
- Tian Xia
- Department of Cancer Biology, Infection Biology Program, and Global Center for Pathogen and Human Health Research, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Xin Wu
- Department of Cancer Biology, Infection Biology Program, and Global Center for Pathogen and Human Health Research, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Eunjin Hong
- Department of Molecular Microbiology and Immunology, Keck School of Medicine, University of Southern California, California, United States of America
| | - Kyle Jung
- Department of Cancer Biology, Infection Biology Program, and Global Center for Pathogen and Human Health Research, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Chih-Jen Lai
- Department of Cancer Biology, Infection Biology Program, and Global Center for Pathogen and Human Health Research, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Mi-Jeong Kwak
- Department of Cancer Biology, Infection Biology Program, and Global Center for Pathogen and Human Health Research, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Hogyu Seo
- Department of Cancer Biology, Infection Biology Program, and Global Center for Pathogen and Human Health Research, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Stephanie Kim
- Department of Cancer Biology, Infection Biology Program, and Global Center for Pathogen and Human Health Research, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Zhongyi Jiang
- Department of Cancer Biology, Infection Biology Program, and Global Center for Pathogen and Human Health Research, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Inho Cha
- Department of Cancer Biology, Infection Biology Program, and Global Center for Pathogen and Human Health Research, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Jae U. Jung
- Department of Cancer Biology, Infection Biology Program, and Global Center for Pathogen and Human Health Research, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
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8
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Chen R, Huang W, Wang Y. Pseudotyped Virus for Bandavirus. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2023; 1407:265-277. [PMID: 36920702 DOI: 10.1007/978-981-99-0113-5_14] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
Abstract
The genus Bandavirus, belonging to family Phenuiviridae, order Bunyavirales, consists of eight tick-borne bunyaviruses. The Dabie bandavirus, formerly known as severe fever with thrombocytopenia virus (SFTSV), belongs to the genus Bandavirus. This emerging pathogen was first identified in central China in 2009. In recent years, the disease has been reported to cause several outbreaks in eastern Asia areas, including China, Japan, Korea, and Vietnam. Tick-to-human transmission is the main route of infection in humans, and transmission via the contact of body fluids from person-to-person was also reported. Despite its high fatality rate, there is currently no vaccine or antiviral therapy available. The therapeutic efficacies of several antiviral agents against Dabie bandavirus are still being evaluated. However, the virus is a potent pathogen with high biosafety experimental conditions. Therefore, replication-incompetent pseudotyped viruses play an important role. In this chapter, we succinctly summarize the basic features concerning Dabie bandavirus, including virion structure, genome characteristics, especially the characteristics of glycoprotein, and probable pathogenic mechanism. And, we put an important part in expounding the construction of pseudoviruses and its application.
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Affiliation(s)
- Ruifeng Chen
- Immunotech Applied Science Limited, Beijing, China
| | - Weijing Huang
- Division of HIV/AIDS and Sex-transmitted Virus Vaccines, National Institutes for Food and Drug Control (NIFDC) and WHO Collaborating Center for Standardization and Evaluation of Biologicals, Beijing, China
| | - Youchun Wang
- Chinese Academy of Medical Science & Peking Union Medical College, Beijing, China. .,Institute of Medical Biology, Chinese Academy of Medical Science & Peking Union Medical College, Kunming, China.
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9
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Fine mapping of the antigenic epitopes of the Gc protein of Guertu virus. PLoS One 2022; 17:e0271878. [PMID: 35881569 PMCID: PMC9321374 DOI: 10.1371/journal.pone.0271878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Accepted: 07/08/2022] [Indexed: 11/19/2022] Open
Abstract
Guertu virus (GTV), a newly discovered member of the genus Banyangvirus in the family Phenuiviridae, poses a potential health threat to humans and animals. The viral glycoprotein (GP) binds to host cell receptors to induce a neutralizing immune response in the host. Therefore, identification of the B-cell epitopes (BCEs) in the immunodominant region of the GTV Gc protein is important for the elucidation of the virus–host cell interactions and the development of GTV epitope assays and vaccines. In this study, an improved overlapping biosynthetic peptide method and rabbit anti-GTV Gc polyclonal antibodies were used for fine mapping of the minimal motifs of linear BCEs of the GTV Gc protein. Thirteen BCE motifs were identified from eleven positive 16mer-peptides, namely EGc1 (19KVCATTGRA27), EGc2 (58KKINLKCKK66), EGc3 (68SSYYVPDA75), EGc4 (75ARSRCTSVRR84), EGc5 (79CTSVRRCRWA88), EGc6 (90DCQSGCPS97), EGc7 (96PSHFTSNS103), EGc8 (115AGLGFSG121), EGc9 (148ENPHGVI154), EGc10 (179KVFHPMS185), EGc11 (230QAGMGVVG237), EGc12 (303RSHDSQGKIS312), and EGc13 (430DIPRFV435). Of these, 7 could be recognized by GTV IgG-positive sheep sera. Three-dimensional structural analysis revealed that all 13 BCEs were present on the surface of the Gc protein. Sequence alignment of the 13 BCEs against homologous proteins from 10 closely related strains of severe fever with thrombocytopenia syndrome virus from different geographical regions revealed that the amino acid sequences of EGc4, EGc5, EGc8, EGc11, and EGc12 were highly conserved, with 100% similarity. The remaining 8 epitopes (EGc1, EGc2, EGc3, EGc6, EGc7, EGc9, EGc10, and EGc13) showed high sequence similarity in the range of 71.43%–87.50%. These 13 BCEs of the GTV Gc protein provide a molecular foundation for future studies of the immunological properties of GTV glycoproteins and the development of GTV multi-epitope assays and vaccines.
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Wang M, Tan W, Li J, Fang L, Yue M. The Endless Wars: Severe Fever With Thrombocytopenia Syndrome Virus, Host Immune and Genetic Factors. Front Cell Infect Microbiol 2022; 12:808098. [PMID: 35782112 PMCID: PMC9240209 DOI: 10.3389/fcimb.2022.808098] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Accepted: 05/10/2022] [Indexed: 01/10/2023] Open
Abstract
Severe fever with thrombocytopenia syndrome (SFTS) is an emerging arboviral infectious disease with a high rate of lethality in susceptible humans and caused by severe fever with thrombocytopenia syndrome bunyavirus (SFTSV). Currently, neither vaccine nor specific antiviral drugs are available. In recent years, given the fact that both the number of SFTS cases and epidemic regions are increasing year by year, SFTS has become a public health problem. SFTSV can be internalized into host cells through the interaction between SFTSV glycoproteins and cell receptors and can activate the host immune system to trigger antiviral immune response. However, SFTSV has evolved multiple strategies to manipulate host factors to create an optimal environment for itself. Not to be discounted, host genetic factors may be operative also in the never-ending winning or losing wars. Therefore, the identifications of SFTSV, host immune and genetic factors, and their interactions are critical for understanding the pathogenic mechanisms of SFTSV infection. This review summarizes the updated pathogenesis of SFTS with regard to virus, host immune response, and host genetic factors to provide some novel perspectives of the prevention, treatment, as well as drug and vaccine developments.
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Affiliation(s)
- Min Wang
- Department of Infectious Diseases, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Weilong Tan
- Department of Infection Disease, Huadong Research Institute for Medicine and Biotechniques, Nanjing, China
| | - Jun Li
- Department of Infectious Diseases, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Liqun Fang
- State Key Lab Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
- *Correspondence: Liqun Fang, ; Ming Yue,
| | - Ming Yue
- Department of Infectious Diseases, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
- *Correspondence: Liqun Fang, ; Ming Yue,
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11
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Subcellular localization of nucleocapsid protein of SFTSV and its assembly into the ribonucleoprotein complex with L protein and viral RNA. Sci Rep 2021; 11:22977. [PMID: 34836987 PMCID: PMC8626419 DOI: 10.1038/s41598-021-01985-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Accepted: 10/29/2021] [Indexed: 11/08/2022] Open
Abstract
Severe fever with thrombocytopenia syndrome virus (SFTSV) is an emerging bunyavirus that causes novel zoonotic diseases in Asian countries including China, Japan, South Korea, and Vietnam. In phleboviruses, viral proteins play a critical role in viral particle formation inside the host cells. Viral glycoproteins (GPs) and RNA-dependent RNA polymerase (RdRp) are colocalized in the Golgi apparatus and endoplasmic reticulum-Golgi intermediate compartment (ERGIC). The nucleocapsid (N) protein was widely expressed in the cytoplasm, even in cells coexpressing GP. However, the role of SFTSV N protein remains unclear. The subcellular localization of SFTSV structural proteins was investigated using a confocal microscope. Subsequently, minigenome and immunoprecipitation assays were carried out. The N protein interacts with viral RNA (vRNA) and further shows translational activity with RdRp which is L protein and localized in the ERGIC and Golgi apparatus when co-expressed with GP. On the other hand, mutant N protein did not interact with vRNA either localized in the ERGIC or Golgi apparatus. The interaction between the N protein of SFTSV and vRNA is important for the localization of viral proteins and viral assembly. This study provides useful insights into the life cycle of SFTSV, which will lead to the detection of antiviral targets.
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12
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Moming A, Shi S, Shen S, Qiao J, Yue X, Wang B, Ding J, Hu Z, Deng F, Zhang Y, Sun S. Fine mapping epitope on Glycoprotein-Gn from Severe Fever with Thrombocytopenia Syndrome Virus. PLoS One 2021; 16:e0248005. [PMID: 33651850 PMCID: PMC7924767 DOI: 10.1371/journal.pone.0248005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Accepted: 02/17/2021] [Indexed: 02/07/2023] Open
Abstract
Severe Fever with Thrombocytopenia Syndrome Virus (SFTSV) was recently identified as a tick-borne pathogen that threat to human health. Since 2010, many countries including China, South Korea, and Japan have reported Human SFTS caused by SFTSV infection. The glycoprotein encoded by the SFTSV M gene is the major antigenic component on the viral surface, and responsible for the viral entry, which makes it an important viral antigen and a clinical diagnostic target. The present study aimed to map linear B cell epitopes (BCEs) on the N-terminal glycoprotein (Gn) from SFTSV strain WCH/97/HN/China/2011 using the modified biosynthetic peptide method. Five fine epitopes (E1, 196FSQSEFPD203; E2, 232GHSHKII238; E3, 256VCYKEGTGPC265; E4, 285FCKVAG290, and E5, 316SYGGM320) were identified using the rabbit antisera. Western blot analysis showed that all the five epitopes interacted with the positive serum of sheep that had been naturally infected with SFTSV. Three-dimensional structural modeling analysis showed that all identified BCEs were located on the surface of the SFTSV-Gn and contained flexible loops. The sequence alignment revealed high conservation of the identified BCEs among 13 SFTSV strains from different lineage. These mapped epitopes will escalate the understanding of the epitope distribution and pathogenic mechanism of SFTSV, and could provide a basis for the development of a SFTSV multi-epitope detection antigen.
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Affiliation(s)
- Abulimiti Moming
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science and Technology, Xinjiang University, Urumqi, China
| | - Shen Shi
- Center for Disease Control and Prevention of Xinjiang Uygur Autonomous Region, Urumqi, China
| | - Shu Shen
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, China
| | - Jie Qiao
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, China
| | - Xihong Yue
- Center for Disease Control and Prevention of Xinjiang Uygur Autonomous Region, Urumqi, China
| | - Bo Wang
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, China
| | - Juntao Ding
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science and Technology, Xinjiang University, Urumqi, China
| | - Zhihong Hu
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, China
| | - Fei Deng
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, China
- * E-mail: (FD); (YZ); (SS)
| | - Yujiang Zhang
- Center for Disease Control and Prevention of Xinjiang Uygur Autonomous Region, Urumqi, China
- * E-mail: (FD); (YZ); (SS)
| | - Surong Sun
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science and Technology, Xinjiang University, Urumqi, China
- * E-mail: (FD); (YZ); (SS)
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13
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Baseline mapping of severe fever with thrombocytopenia syndrome virology, epidemiology and vaccine research and development. NPJ Vaccines 2020; 5:111. [PMID: 33335100 PMCID: PMC7746727 DOI: 10.1038/s41541-020-00257-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Accepted: 10/13/2020] [Indexed: 12/13/2022] Open
Abstract
Severe fever with thrombocytopenia syndrome virus (SFTSV) is a newly emergent tick-borne bunyavirus first discovered in 2009 in China. SFTSV is a growing public health problem that may become more prominent owing to multiple competent tick-vectors and the expansion of human populations in areas where the vectors are found. Although tick-vectors of SFTSV are found in a wide geographic area, SFTS cases have only been reported from China, South Korea, Vietnam, and Japan. Patients with SFTS often present with high fever, leukopenia, and thrombocytopenia, and in some cases, symptoms can progress to severe outcomes, including hemorrhagic disease. Reported SFTSV case fatality rates range from ~5 to >30% depending on the region surveyed, with more severe disease reported in older individuals. Currently, treatment options for this viral infection remain mostly supportive as there are no licensed vaccines available and research is in the discovery stage. Animal models for SFTSV appear to recapitulate many facets of human disease, although none of the models mirror all clinical manifestations. There are insufficient data available on basic immunologic responses, the immune correlate(s) of protection, and the determinants of severe disease by SFTSV and related viruses. Many aspects of SFTSV virology and epidemiology are not fully understood, including a detailed understanding of the annual numbers of cases and the vertebrate host of the virus, so additional research on this disease is essential towards the development of vaccines and therapeutics.
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14
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Perez-Sautu U, Gu SH, Caviness K, Song DH, Kim YJ, Paola ND, Lee D, Klein TA, Chitty JA, Nagle E, Kim HC, Chong ST, Beitzel B, Reyes DS, Finch C, Byrum R, Cooper K, Liang J, Kuhn JH, Zeng X, Kuehl KA, Coffin KM, Liu J, Oh HS, Seog W, Choi BS, Sanchez-Lockhart M, Palacios G, Jeong ST. A Model for the Production of Regulatory Grade Viral Hemorrhagic Fever Exposure Stocks: From Field Surveillance to Advanced Characterization of SFTSV. Viruses 2020; 12:v12090958. [PMID: 32872451 PMCID: PMC7552075 DOI: 10.3390/v12090958] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 08/25/2020] [Accepted: 08/26/2020] [Indexed: 02/05/2023] Open
Abstract
Severe fever with thrombocytopenia syndrome virus (SFTSV) is an emerging human pathogen, endemic in areas of China, Japan, and the Korea (KOR). It is primarily transmitted through infected ticks and can cause a severe hemorrhagic fever disease with case fatality rates as high as 30%. Despite its high virulence and increasing prevalence, molecular and functional studies in situ are scarce due to the limited availability of high-titer SFTSV exposure stocks. During the course of field virologic surveillance in 2017, we detected SFTSV in ticks and in a symptomatic soldier in a KOR Army training area. SFTSV was isolated from the ticks producing a high-titer viral exposure stock. Through the use of advanced genomic tools, we present here a complete, in-depth characterization of this viral stock, including a comparison with both the virus in its arthropod source and in the human case, and an in vivo study of its pathogenicity. Thanks to this detailed characterization, this SFTSV viral exposure stock constitutes a quality biological tool for the study of this viral agent and for the development of medical countermeasures, fulfilling the requirements of the main regulatory agencies.
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Affiliation(s)
- Unai Perez-Sautu
- Center for Genome Sciences, United States Army Medical Research Institute of Infectious Diseases (USAMRIID), Fort Detrick, Frederick, MD 21702, USA; (U.P.-S.); (K.C.); (N.D.P.); (J.A.C.); (E.N.); (B.B.); (D.S.R.)
| | - Se Hun Gu
- The 4th Research & Development Institute, Agency for Defense Development (ADD), Daejeon 34186, Korea; (S.H.G.); (D.H.S.); (D.L.)
| | - Katie Caviness
- Center for Genome Sciences, United States Army Medical Research Institute of Infectious Diseases (USAMRIID), Fort Detrick, Frederick, MD 21702, USA; (U.P.-S.); (K.C.); (N.D.P.); (J.A.C.); (E.N.); (B.B.); (D.S.R.)
| | - Dong Hyun Song
- The 4th Research & Development Institute, Agency for Defense Development (ADD), Daejeon 34186, Korea; (S.H.G.); (D.H.S.); (D.L.)
| | - Yu-Jin Kim
- Army Headquarters, Gyeryong-si 32800, Korea; (Y.-J.K.); (B.-S.C.)
| | - Nicholas Di Paola
- Center for Genome Sciences, United States Army Medical Research Institute of Infectious Diseases (USAMRIID), Fort Detrick, Frederick, MD 21702, USA; (U.P.-S.); (K.C.); (N.D.P.); (J.A.C.); (E.N.); (B.B.); (D.S.R.)
| | - Daesang Lee
- The 4th Research & Development Institute, Agency for Defense Development (ADD), Daejeon 34186, Korea; (S.H.G.); (D.H.S.); (D.L.)
| | - Terry A. Klein
- Force Health Protection and Preventive Medicine, Medical Department Activity-Korea/65th Medical Brigade, Unit 15281, APO AP 96271, USA; (T.A.K.); (H.-C.K.); (S.-T.C.)
| | - Joseph A. Chitty
- Center for Genome Sciences, United States Army Medical Research Institute of Infectious Diseases (USAMRIID), Fort Detrick, Frederick, MD 21702, USA; (U.P.-S.); (K.C.); (N.D.P.); (J.A.C.); (E.N.); (B.B.); (D.S.R.)
| | - Elyse Nagle
- Center for Genome Sciences, United States Army Medical Research Institute of Infectious Diseases (USAMRIID), Fort Detrick, Frederick, MD 21702, USA; (U.P.-S.); (K.C.); (N.D.P.); (J.A.C.); (E.N.); (B.B.); (D.S.R.)
| | - Heung-Chul Kim
- Force Health Protection and Preventive Medicine, Medical Department Activity-Korea/65th Medical Brigade, Unit 15281, APO AP 96271, USA; (T.A.K.); (H.-C.K.); (S.-T.C.)
| | - Sung-Tae Chong
- Force Health Protection and Preventive Medicine, Medical Department Activity-Korea/65th Medical Brigade, Unit 15281, APO AP 96271, USA; (T.A.K.); (H.-C.K.); (S.-T.C.)
| | - Brett Beitzel
- Center for Genome Sciences, United States Army Medical Research Institute of Infectious Diseases (USAMRIID), Fort Detrick, Frederick, MD 21702, USA; (U.P.-S.); (K.C.); (N.D.P.); (J.A.C.); (E.N.); (B.B.); (D.S.R.)
| | - Daniel S. Reyes
- Center for Genome Sciences, United States Army Medical Research Institute of Infectious Diseases (USAMRIID), Fort Detrick, Frederick, MD 21702, USA; (U.P.-S.); (K.C.); (N.D.P.); (J.A.C.); (E.N.); (B.B.); (D.S.R.)
| | - Courtney Finch
- Integrated Research Facility at Fort Detrick (IRF-Frederick), Division of Clinical Research (DCR), National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Fort Detrick, Frederick, MD 21702, USA; (C.F.); (R.B.); (K.C.); (J.L.); (J.H.K.)
| | - Russ Byrum
- Integrated Research Facility at Fort Detrick (IRF-Frederick), Division of Clinical Research (DCR), National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Fort Detrick, Frederick, MD 21702, USA; (C.F.); (R.B.); (K.C.); (J.L.); (J.H.K.)
| | - Kurt Cooper
- Integrated Research Facility at Fort Detrick (IRF-Frederick), Division of Clinical Research (DCR), National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Fort Detrick, Frederick, MD 21702, USA; (C.F.); (R.B.); (K.C.); (J.L.); (J.H.K.)
| | - Janie Liang
- Integrated Research Facility at Fort Detrick (IRF-Frederick), Division of Clinical Research (DCR), National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Fort Detrick, Frederick, MD 21702, USA; (C.F.); (R.B.); (K.C.); (J.L.); (J.H.K.)
| | - Jens H. Kuhn
- Integrated Research Facility at Fort Detrick (IRF-Frederick), Division of Clinical Research (DCR), National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Fort Detrick, Frederick, MD 21702, USA; (C.F.); (R.B.); (K.C.); (J.L.); (J.H.K.)
| | - Xiankun Zeng
- Pathology Division, United States Army Medical Research Institute of Infectious Diseases (USAMRIID), Fort Detrick, Frederick, MD 21702, USA; (X.Z.); (K.A.K.); (K.M.C.); (J.L.)
| | - Kathleen A. Kuehl
- Pathology Division, United States Army Medical Research Institute of Infectious Diseases (USAMRIID), Fort Detrick, Frederick, MD 21702, USA; (X.Z.); (K.A.K.); (K.M.C.); (J.L.)
| | - Kayla M. Coffin
- Pathology Division, United States Army Medical Research Institute of Infectious Diseases (USAMRIID), Fort Detrick, Frederick, MD 21702, USA; (X.Z.); (K.A.K.); (K.M.C.); (J.L.)
| | - Jun Liu
- Pathology Division, United States Army Medical Research Institute of Infectious Diseases (USAMRIID), Fort Detrick, Frederick, MD 21702, USA; (X.Z.); (K.A.K.); (K.M.C.); (J.L.)
| | - Hong Sang Oh
- Armed Forces Medical Command, Seongnam-si 13590, Korea; (H.S.O.); (W.S.)
| | - Woong Seog
- Armed Forces Medical Command, Seongnam-si 13590, Korea; (H.S.O.); (W.S.)
| | - Byung-Sub Choi
- Army Headquarters, Gyeryong-si 32800, Korea; (Y.-J.K.); (B.-S.C.)
| | - Mariano Sanchez-Lockhart
- Center for Genome Sciences, United States Army Medical Research Institute of Infectious Diseases (USAMRIID), Fort Detrick, Frederick, MD 21702, USA; (U.P.-S.); (K.C.); (N.D.P.); (J.A.C.); (E.N.); (B.B.); (D.S.R.)
- Department of Pathology & Microbiology, University of Nebraska Medical Centre, Omaha, NE 68198, USA
- Correspondence: (M.S.-L.); (G.P.); (S.T.J.)
| | - Gustavo Palacios
- Center for Genome Sciences, United States Army Medical Research Institute of Infectious Diseases (USAMRIID), Fort Detrick, Frederick, MD 21702, USA; (U.P.-S.); (K.C.); (N.D.P.); (J.A.C.); (E.N.); (B.B.); (D.S.R.)
- Correspondence: (M.S.-L.); (G.P.); (S.T.J.)
| | - Seong Tae Jeong
- The 4th Research & Development Institute, Agency for Defense Development (ADD), Daejeon 34186, Korea; (S.H.G.); (D.H.S.); (D.L.)
- Correspondence: (M.S.-L.); (G.P.); (S.T.J.)
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Liu T, Li J, Liu Y, Qu Y, Li A, Li C, Zhang Q, Wu W, Li J, Liu Y, Li D, Wang S, Liang M. SNX11 Identified as an Essential Host Factor for SFTS Virus Infection by CRISPR Knockout Screening. Virol Sin 2019; 34:508-520. [PMID: 31215001 PMCID: PMC6814687 DOI: 10.1007/s12250-019-00141-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Accepted: 05/17/2019] [Indexed: 01/23/2023] Open
Abstract
Severe fever with thrombocytopenia syndrome virus (SFTSV) is a highly pathogenic tick-borne bunyavirus that causes lethal infectious disease and severe fever with thrombocytopenia syndrome (SFTS) in humans. The molecular mechanisms and host cellular factors required for SFTSV infection remain uncharacterized. Using a genome-wide CRISPR-based screening strategy, we identified a host cellular protein, sorting nexin 11 (SNX11) which is involved in the intracellular endosomal trafficking pathway, as an essential cell factor for SFTSV infection. An SNX11-KO HeLa cell line was established, and SFTSV replication was significantly reduced. The glycoproteins of SFTSV were detected and remained in later endosomal compartments but were not detectable in the endoplasmic reticulum (ER) or Golgi apparatus. pH values in the endosomal compartments of the SNX11-KO cells increased compared with the pH of normal HeLa cells, and lysosomal-associated membrane protein 1 (LAMP1) expression was significantly elevated in the SNX11-KO cells. Overall, these results indicated that penetration of SFTSV from the endolysosomes into the cytoplasm of host cells was blocked in the cells lacking SNX11. Our study for the first time provides insight into the important role of the SNX11 as an essential host factor in the intracellular trafficking and penetrating process of SFTSV infection via potential regulation of viral protein sorting, membrane fusion, and other endocytic machinery.
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Affiliation(s)
- Tiezhu Liu
- Key Laboratory of Medical Virology and Viral Diseases, Ministry of Health of People's Republic of China, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China
| | - Jiajia Li
- Department of Microbiology, Anhui Medical University, Hefei, 230032, China
- The First Affiliated Hospital of Anhui Medical University, Hefei, 230022, China
| | - Yang Liu
- Key Laboratory of Medical Virology and Viral Diseases, Ministry of Health of People's Republic of China, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China
| | - Yuanyuan Qu
- Key Laboratory of Medical Virology and Viral Diseases, Ministry of Health of People's Republic of China, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China
| | - Aqian Li
- Key Laboratory of Medical Virology and Viral Diseases, Ministry of Health of People's Republic of China, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China
| | - Chuan Li
- Key Laboratory of Medical Virology and Viral Diseases, Ministry of Health of People's Republic of China, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China
| | - Quanfu Zhang
- Key Laboratory of Medical Virology and Viral Diseases, Ministry of Health of People's Republic of China, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China
| | - Wei Wu
- Key Laboratory of Medical Virology and Viral Diseases, Ministry of Health of People's Republic of China, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China
| | - Jiandong Li
- Key Laboratory of Medical Virology and Viral Diseases, Ministry of Health of People's Republic of China, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China
| | - Yan Liu
- Department of Microbiology, Anhui Medical University, Hefei, 230032, China
| | - Dexin Li
- Key Laboratory of Medical Virology and Viral Diseases, Ministry of Health of People's Republic of China, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China
| | - Shiwen Wang
- Key Laboratory of Medical Virology and Viral Diseases, Ministry of Health of People's Republic of China, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China.
- CDC-WIV Joint Research Center for Emerging Diseases and Biosafety, Wuhan, 430071, China.
| | - Mifang Liang
- Key Laboratory of Medical Virology and Viral Diseases, Ministry of Health of People's Republic of China, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China.
- CDC-WIV Joint Research Center for Emerging Diseases and Biosafety, Wuhan, 430071, China.
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16
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Tani H, Kawachi K, Kimura M, Taniguchi S, Shimojima M, Fukushi S, Igarashi M, Morikawa S, Saijo M. Identification of the amino acid residue important for fusion of severe fever with thrombocytopenia syndrome virus glycoprotein. Virology 2019; 535:102-110. [PMID: 31299486 DOI: 10.1016/j.virol.2019.06.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Revised: 06/17/2019] [Accepted: 06/26/2019] [Indexed: 12/20/2022]
Abstract
Severe fever with thrombocytopenia syndrome (SFTS) is an infectious disease with a high fatality rate, caused by SFTS virus (SFTSV). Because little is known about the nature of SFTSV, basic studies are required for the developments of vaccines and effective therapies. In the present study, we identified the amino acid residue important for membrane fusion induced by the SFTSV glycoprotein (GP). Syncytium formations were observed in cells expressing the GPs of SFTSV Japanese strain (YG-1 and SPL030). In contrast, no or only weak syncytium formations were induced in cells expressing GP of SFTSV Chinese strain (HB29). The replacement of arginine at amino acid residue 962 with serine in HB29 GP (R962S) induced membrane fusion, while the replacement of serine at residue 962 with arginine in YG1 GP (S962R) did not. These data indicate that serine at residue 962 in the SFTSV-GP is critical for inducing membrane fusion and viral infection.
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Affiliation(s)
- Hideki Tani
- Department of Virology I, National Institute of Infectious Diseases, Tokyo, Japan; Department of Virology, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan
| | - Kengo Kawachi
- Department of Virology I, National Institute of Infectious Diseases, Tokyo, Japan; Research Institute for Microbial Diseases, Osaka University, Osaka, Japan
| | - Miyuki Kimura
- Department of Virology, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan
| | - Satoshi Taniguchi
- Department of Virology I, National Institute of Infectious Diseases, Tokyo, Japan
| | - Masayuki Shimojima
- Department of Virology I, National Institute of Infectious Diseases, Tokyo, Japan
| | - Shuetsu Fukushi
- Department of Virology I, National Institute of Infectious Diseases, Tokyo, Japan
| | - Manabu Igarashi
- Division of Global Epidemiology, Research Center for Zoonosis Control, Hokkaido University, Sapporo, Japan; Global Station for Zoonosis Control, Global Institution for Collaborative Research and Education, Hokkaido University, Sapporo, Japan
| | - Shigeru Morikawa
- Department of Veterinary Science, National Institute of Infectious Diseases, Tokyo, Japan
| | - Masayuki Saijo
- Department of Virology I, National Institute of Infectious Diseases, Tokyo, Japan.
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17
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Plegge T, Spiegel M, Krüger N, Nehlmeier I, Winkler M, González Hernández M, Pöhlmann S. Inhibitors of signal peptide peptidase and subtilisin/kexin-isozyme 1 inhibit Ebola virus glycoprotein-driven cell entry by interfering with activity and cellular localization of endosomal cathepsins. PLoS One 2019; 14:e0214968. [PMID: 30973897 PMCID: PMC6459477 DOI: 10.1371/journal.pone.0214968] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Accepted: 03/24/2019] [Indexed: 11/30/2022] Open
Abstract
Emerging viruses such as severe fever and thrombocytopenia syndrome virus (SFTSV) and Ebola virus (EBOV) are responsible for significant morbidity and mortality. Host cell proteases that process the glycoproteins of these viruses are potential targets for antiviral intervention. The aspartyl protease signal peptide peptidase (SPP) has recently been shown to be required for processing of the glycoprotein precursor, Gn/Gc, of Bunyamwera virus and for viral infectivity. Here, we investigated whether SPP is also required for infectivity of particles bearing SFTSV-Gn/Gc. Entry driven by the EBOV glycoprotein (GP) and the Lassa virus glycoprotein (LASV-GPC) depends on the cysteine proteases cathepsin B and L (CatB/CatL) and the serine protease subtilisin/kexin-isozyme 1 (SKI-1), respectively, and was examined in parallel for control purposes. We found that inhibition of SPP and SKI-1 did not interfere with SFTSV Gn + Gc-driven entry but, unexpectedly, blocked entry mediated by EBOV-GP. The inhibition occurred at the stage of proteolytic activation and the SPP inhibitor was found to block CatL/CatB activity. In contrast, the SKI-1 inhibitor did not interfere with CatB/CatL activity but disrupted CatB localization in endo/lysosomes, the site of EBOV-GP processing. These results underline the potential of protease inhibitors for antiviral therapy but also show that previously characterized compounds might exert broader specificity than initially appreciated and might block viral entry via diverse mechanisms.
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Affiliation(s)
- Teresa Plegge
- Infection Biology Unit, German Primate Center–Leibniz Institute for Primate Research, Göttingen, Germany
- Faculty of Biology and Psychology, University Göttingen, Göttingen, Germany
| | - Martin Spiegel
- Infection Biology Unit, German Primate Center–Leibniz Institute for Primate Research, Göttingen, Germany
- Institute of Microbiology and Virology, Brandenburg Medical School Theodor Fontane, Senftenberg, Germany
| | - Nadine Krüger
- Institute of Virology, University of Veterinary Medicine Hannover, Hannover, Germany
- Research Center for Emerging Infections and Zoonoses, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Inga Nehlmeier
- Infection Biology Unit, German Primate Center–Leibniz Institute for Primate Research, Göttingen, Germany
| | - Michael Winkler
- Infection Biology Unit, German Primate Center–Leibniz Institute for Primate Research, Göttingen, Germany
| | - Mariana González Hernández
- Infection Biology Unit, German Primate Center–Leibniz Institute for Primate Research, Göttingen, Germany
- Faculty of Biology and Psychology, University Göttingen, Göttingen, Germany
| | - Stefan Pöhlmann
- Infection Biology Unit, German Primate Center–Leibniz Institute for Primate Research, Göttingen, Germany
- Faculty of Biology and Psychology, University Göttingen, Göttingen, Germany
- * E-mail:
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18
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Kim KH, Kim J, Ko M, Chun JY, Kim H, Kim S, Min JY, Park WB, Oh MD, Chung J. An anti-Gn glycoprotein antibody from a convalescent patient potently inhibits the infection of severe fever with thrombocytopenia syndrome virus. PLoS Pathog 2019; 15:e1007375. [PMID: 30707748 PMCID: PMC6380599 DOI: 10.1371/journal.ppat.1007375] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 02/19/2019] [Accepted: 01/14/2019] [Indexed: 11/19/2022] Open
Abstract
Severe fever with thrombocytopenia syndrome (SFTS) is an emerging infectious disease localized to China, Japan, and Korea that is characterized by severe hemorrhage and a high fatality rate. Currently, no specific vaccine or treatment has been approved for this disease. To develop a therapeutic agent for SFTS, we isolated antibodies from a phage-displayed antibody library that was constructed from a patient who recovered from SFTS virus (SFTSV) infection. One antibody, designated as Ab10, was reactive to the Gn envelope glycoprotein of SFTSV and protected host cells and A129 mice from infection in both in vitro and in vivo experiments. Notably, Ab10 protected 80% of mice, even when injected 5 days after inoculation with a lethal dose of SFTSV. Using cross-linker assisted mass spectrometry and alanine scanning, we located the non-linear epitope of Ab10 on the Gn glycoprotein domain II and an unstructured stem region, suggesting that Ab10 may inhibit a conformational alteration that is critical for cell membrane fusion between the virus and host cell. Ab10 reacted to recombinant Gn glycoprotein in Gangwon/Korea/2012, HB28, and SD4 strains. Additionally, based on its epitope, we predict that Ab10 binds the Gn glycoprotein in 247 of 272 SFTSV isolates previously reported. Together, these data suggest that Ab10 has potential to be developed into a therapeutic agent that could protect against more than 90% of reported SFTSV isolates. Severe fever with thrombocytopenia syndrome (SFTS) is an emerging infectious disease localized to China, Japan, and Korea. The tick-borne virus that causes SFTS has infected more than 5,000 humans, with a 6.4% to 20.9% fatality rate. Currently, there are no prophylactic or therapeutic measures against this virus. Historically, antibodies from patients who recovered from viral infection have been used to treat new patients, and commercially available antiviral monoclonal antibodies have been developed. Palivizumab was approved for the prophylaxis of respiratory syncytial virus (RSV) infection, and ibalizumab-uiyk was recently approved for the treatment of human immunodeficiency virus (HIV)-infected patients. To develop an antiviral monoclonal antibody for SFTS patients, we selected 10 antibodies from a patient who recovered from SFTS and found that one antibody potently inhibited SFTS viral infection both in vitro and in animal studies. We mapped the binding site of this antibody on the SFTS virus, which allowed us to predict that this antibody could bind 247 out of the 272 SFTS virus isolates reported to date. We anticipate that this antibody could be developed into a therapeutic treatment against SFTS.
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Affiliation(s)
- Ki Hyun Kim
- Department of Biochemistry and Molecular Biology, Seoul National University College of Medicine, Seoul, Republic of Korea
- Cancer Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Jinhee Kim
- Respiratory Virus Laboratory, Institut Pasteur Korea, Gyeonggi-do, Republic of Korea
| | - Meehyun Ko
- Respiratory Virus Laboratory, Institut Pasteur Korea, Gyeonggi-do, Republic of Korea
| | - June Young Chun
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Hyori Kim
- Cancer Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Seungtaek Kim
- Zoonotic Virus Laboratory, Institut Pasteur Korea, Gyeonggi-do, Republic of Korea
| | - Ji-Young Min
- Respiratory Virus Laboratory, Institut Pasteur Korea, Gyeonggi-do, Republic of Korea
| | - Wan Beom Park
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Myoung-don Oh
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Junho Chung
- Department of Biochemistry and Molecular Biology, Seoul National University College of Medicine, Seoul, Republic of Korea
- Cancer Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea
- Department of Biomedical Science, Seoul National University College of Medicine, Seoul, Republic of Korea
- * E-mail:
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19
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Zuo JY, Jiao YJ, Zhu J, Ding SN. Rapid Detection of Severe Fever with Thrombocytopenia Syndrome Virus via Colloidal Gold Immunochromatography Assay. ACS OMEGA 2018; 3:15399-15406. [PMID: 30556007 PMCID: PMC6288773 DOI: 10.1021/acsomega.8b02366] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Accepted: 10/31/2018] [Indexed: 05/19/2023]
Abstract
To develop the point-of-care testing method to facilitate the clinical detection of severe fever with thrombocytopenia syndrome virus (SFTSV), colloidal gold paper-based lateral flow immunochromatography test strips (LFITSs) have been fabricated for the rapid detection for the first time. The pH value and the amount of monoclonal antibody to prepare colloidal gold nanoparticle-labeled monoclonal antibody bioconjugates were optimized. In addition, 0.4% bovine serum albumin was considered to be the best concentration for blocking nitrocellulose membranes. Under optimal conditions, the limit of detection for SFTSV was as low as 1 ng/mL depending on a visual line. Meanwhile, the entire detection process required no more than 10 min with a volume of only 50 μL of the analyte solution. Moreover, paper-based LFITSs were evaluated in real samples of human serum of patients with satisfactory results. In addition, all strips were of high stability and specificity. In the light of advantages such as simple, portable, rapid, and low cost, the developed LFITSs will extensively come into service, especially in remote areas.
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Affiliation(s)
- Jia-Ying Zuo
- Jiangsu
Province Hi-Tech Key Laboratory for Bio-Medical Research, School of
Chemistry and Chemical Engineering, Southeast
University, Nanjing 211189, China
| | - Yong-Jun Jiao
- Jiangsu
Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - Jin Zhu
- Huadong
Medical Institute of Biotechniques, Nanjing 210002, China
| | - Shou-Nian Ding
- Jiangsu
Province Hi-Tech Key Laboratory for Bio-Medical Research, School of
Chemistry and Chemical Engineering, Southeast
University, Nanjing 211189, China
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20
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Lundu T, Tsuda Y, Ito R, Shimizu K, Kobayashi S, Yoshii K, Yoshimatsu K, Arikawa J, Kariwa H. Targeting of severe fever with thrombocytopenia syndrome virus structural proteins to the ERGIC (endoplasmic reticulum Golgi intermediate compartment) and Golgi complex. Biomed Res 2018; 39:27-38. [PMID: 29467349 DOI: 10.2220/biomedres.39.27] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Severe fever with thrombocytopenia syndrome phlebovirus (SFTSV) is a newly emerged phlebovirus identified in China, Japan, and South Korea. Phlebovirus glycoproteins (GP) play a key role in targeting viral structural components to the budding compartments in the ER-Golgi intermediate compartment (ERGIC) and Golgi complex. However, the role of SFTSV GP in targeting structural proteins to the ERGIC and Golgi complex remains unresolved. In this study, we show that SFTSV GP plays a significant role in targeting RNA-dependent RNA polymerase (L) and nucleocapsid protein (NP) to the budding sites. Confocal microscopy was used to investigate the subcellular localization of SFTSV structural proteins. In SFTSV-infected cells, GP and L localized to the ER, ERGIC and Golgi complex, whereas NP localized to the ERGIC and Golgi complex. In addition, GP colocalized with L and NP in infected cells. In cells singly transfected with GP, L or NP, GP localized to the same subcellular compartments as in infected cells. However, L or NP alone did not localize to the ER, ERGIC, or Golgi complex. Cotransfection experiments showed that GP altered the localization of L to the ERGIC and Golgi complex but not that of NP. Interestingly, plasmid-expressed NP fused with a hemagglutinin tag localized to the ERGIC and Golgi complex when expressed in SFTSV-infected cells and colocalised with GP, suggesting that GP plays a role in the subcellular localization of L and NP in infected cells. Thus, the SFTSV structural components start to assemble at the ERGIC to Golgi complex. GP is required for transporting L and NP to the ERGIC and Golgi complex. In addition, targeting of NP requires interaction with other factors besides GP.
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Affiliation(s)
- Tapiwa Lundu
- Laboratory of Public Health, Department of Preventive Veterinary Science, Division of Veterinary Medicine, Graduate School of Veterinary Medicine, Hokkaido University.,Department of Biomedical Sciences, School of Veterinary Medicine, University of Zambia
| | - Yoshimi Tsuda
- Laboratory of Microbiology and Infectious Diseases, Department of Microbiology and Immunology, Faculty of Medicine, Hokkaido University
| | - Ryo Ito
- Laboratory of Microbiology and Infectious Diseases, Department of Microbiology and Immunology, Faculty of Medicine, Hokkaido University
| | - Kenta Shimizu
- Laboratory of Microbiology and Infectious Diseases, Department of Microbiology and Immunology, Faculty of Medicine, Hokkaido University
| | - Shintaro Kobayashi
- Laboratory of Public Health, Department of Preventive Veterinary Science, Division of Veterinary Medicine, Faculty of Veterinary Medicine, Hokkaido University
| | - Kentaro Yoshii
- Laboratory of Public Health, Department of Preventive Veterinary Science, Division of Veterinary Medicine, Faculty of Veterinary Medicine, Hokkaido University
| | - Kumiko Yoshimatsu
- Laboratory of Microbiology and Infectious Diseases, Department of Microbiology and Immunology, Faculty of Medicine, Hokkaido University
| | - Jiro Arikawa
- Laboratory of Microbiology and Infectious Diseases, Department of Microbiology and Immunology, Faculty of Medicine, Hokkaido University
| | - Hiroaki Kariwa
- Laboratory of Public Health, Department of Preventive Veterinary Science, Division of Veterinary Medicine, Faculty of Veterinary Medicine, Hokkaido University
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21
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Urata S, Uno Y, Kurosaki Y, Yasuda J. The cholesterol, fatty acid and triglyceride synthesis pathways regulated by site 1 protease (S1P) are required for efficient replication of severe fever with thrombocytopenia syndrome virus. Biochem Biophys Res Commun 2018; 503:631-636. [PMID: 29906459 DOI: 10.1016/j.bbrc.2018.06.053] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Accepted: 06/11/2018] [Indexed: 10/14/2022]
Abstract
Severe fever with thrombocytopenia syndrome (SFTS) is an emerging infectious disease caused by the SFTS virus (SFTSV), which has a high mortality rate. Currently, no licensed vaccines or therapeutic agents have been approved for use against SFTSV infection. Here, we report that the cholesterol, fatty acid, and triglyceride synthesis pathways regulated by S1P is involved in SFTSV replication, using CHO-K1 cell line (SRD-12B) that is deficient in site 1 protease (S1P) enzymatic activity, PF-429242, a small compound targeting S1P enzymatic activity, and Fenofibrate and Lovastatin, which inhibit triglyceride and cholesterol synthesis, respectively. These results enhance our understanding of the SFTSV replication mechanism and may contribute to the development of novel therapies for SFTSV infection.
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Affiliation(s)
- Shuzo Urata
- Department of Emerging Infectious Diseases, Institute of Tropical Medicine (NEKKEN), Japan; National Research Center for the Control and Prevention of Infectious Diseases (CCPID), Nagasaki University, 1-12-4 Sakamoto, Nagasaki, 852-8523, Japan.
| | - Yukiko Uno
- Department of Emerging Infectious Diseases, Institute of Tropical Medicine (NEKKEN), Japan.
| | - Yohei Kurosaki
- Department of Emerging Infectious Diseases, Institute of Tropical Medicine (NEKKEN), Japan.
| | - Jiro Yasuda
- Department of Emerging Infectious Diseases, Institute of Tropical Medicine (NEKKEN), Japan; National Research Center for the Control and Prevention of Infectious Diseases (CCPID), Nagasaki University, 1-12-4 Sakamoto, Nagasaki, 852-8523, Japan.
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22
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Reinke LM, Spiegel M, Plegge T, Hartleib A, Nehlmeier I, Gierer S, Hoffmann M, Hofmann-Winkler H, Winkler M, Pöhlmann S. Different residues in the SARS-CoV spike protein determine cleavage and activation by the host cell protease TMPRSS2. PLoS One 2017. [PMID: 28636671 PMCID: PMC5479546 DOI: 10.1371/journal.pone.0179177] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
The spike (S) protein of severe acute respiratory syndrome coronavirus (SARS-CoV) mediates viral entry into target cells. Cleavage and activation of SARS S by a host cell protease is essential for infectious viral entry and the responsible enzymes are potential targets for antiviral intervention. The type II transmembrane serine protease TMPRSS2 cleaves and activates SARS S in cell culture and potentially also in the infected host. Here, we investigated which determinants in SARS S control cleavage and activation by TMPRSS2. We found that SARS S residue R667, a previously identified trypsin cleavage site, is also required for S protein cleavage by TMPRSS2. The cleavage fragments produced by trypsin and TMPRSS2 differed in their decoration with N-glycans, suggesting that these proteases cleave different SARS S glycoforms. Although R667 was required for SARS S cleavage by TMPRSS2, this residue was dispensable for TMPRSS2-mediated S protein activation. Conversely, residue R797, previously reported to be required for SARS S activation by trypsin, was dispensable for S protein cleavage but required for S protein activation by TMPRSS2. Collectively, these results show that different residues in SARS S control cleavage and activation by TMPRSS2, suggesting that these processes are more complex than initially appreciated.
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Affiliation(s)
| | - Martin Spiegel
- Abteilung Infektionsbiologie, Deutsches Primatenzentrum, Göttingen, Germany
- Institut für Mikrobiologie und Virologie, Medizinische Hochschule Brandenburg Theodor Fontane, Senftenberg, Germany
| | - Teresa Plegge
- Abteilung Infektionsbiologie, Deutsches Primatenzentrum, Göttingen, Germany
| | - Anika Hartleib
- Abteilung Infektionsbiologie, Deutsches Primatenzentrum, Göttingen, Germany
| | - Inga Nehlmeier
- Abteilung Infektionsbiologie, Deutsches Primatenzentrum, Göttingen, Germany
| | - Stefanie Gierer
- Abteilung Infektionsbiologie, Deutsches Primatenzentrum, Göttingen, Germany
| | - Markus Hoffmann
- Abteilung Infektionsbiologie, Deutsches Primatenzentrum, Göttingen, Germany
| | | | - Michael Winkler
- Abteilung Infektionsbiologie, Deutsches Primatenzentrum, Göttingen, Germany
| | - Stefan Pöhlmann
- Abteilung Infektionsbiologie, Deutsches Primatenzentrum, Göttingen, Germany
- * E-mail:
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23
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Zhan J, Wang Q, Cheng J, Hu B, Li J, Zhan F, Song Y, Guo D. Current status of severe fever with thrombocytopenia syndrome in China. Virol Sin 2017; 32:51-62. [PMID: 28251515 DOI: 10.1007/s12250-016-3931-1] [Citation(s) in RCA: 143] [Impact Index Per Article: 20.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Accepted: 02/20/2017] [Indexed: 12/13/2022] Open
Abstract
Severe fever with thrombocytopenia syndrome (SFTS) is an emerging infectious disease caused by SFTS virus (SFTSV). SFTSV is associated with a high mortality rate and has been reported in China, South Korea and Japan. SFTSV undergoes rapid changes owing to evolution, gene mutations, and reassortment between different strains of SFTSV. In this review, we summarize the recent cases and general properties of SFTS, focusing on the epidemiology, genetic diversity, clinical features, and diagnostics of SFTSV in China. From 2010 to October 2016, SFTS cases were reported in 23 provinces of China, with increased numbers yearly. Infection and death cases are mainly found in central China, where the Haemaphysalis longicornis ticks are spread. The national average mortality rate of SFTS infection was 5.3%, with higher risk to elder people. The main epidemic period was from May to July, with a peak in May. Thus, SFTS reminds a significant public health problem, and development of prophylactic vaccines and effective antiviral drugs will be highly needed.
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Affiliation(s)
- Jianbo Zhan
- Wuhan University School of Basic Medical Sciences, Wuhan, 430072, China.,Hubei Provincial Center for Disease Control and Prevention, Wuhan, 430079, China
| | - Qin Wang
- Chinese Center for Disease Control and Prevention, Beijing, 102206, China
| | - Jing Cheng
- Wuhan University of Science and Technology, Wuhan, 430081, China
| | - Bing Hu
- Hubei Provincial Center for Disease Control and Prevention, Wuhan, 430079, China
| | - Jing Li
- Hubei Provincial Center for Disease Control and Prevention, Wuhan, 430079, China
| | - Faxian Zhan
- Hubei Provincial Center for Disease Control and Prevention, Wuhan, 430079, China.
| | - Yi Song
- Hubei Provincial Center for Disease Control and Prevention, Wuhan, 430079, China.
| | - Deyin Guo
- Wuhan University School of Basic Medical Sciences, Wuhan, 430072, China.
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