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Ceconi M, Ariën KK, Delputte P. Diagnosing arthropod-borne flaviviruses: non-structural protein 1 (NS1) as a biomarker. Trends Microbiol 2024; 32:678-696. [PMID: 38135616 DOI: 10.1016/j.tim.2023.11.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 11/29/2023] [Accepted: 11/30/2023] [Indexed: 12/24/2023]
Abstract
In recent decades, the presence of flaviviruses of concern for human health in Europe has drastically increased,exacerbated by the effects of climate change - which has allowed the vectors of these viruses to expand into new territories. Co-circulation of West Nile virus (WNV), Usutu virus (USUV), and tick-borne encephalitis virus (TBEV) represents a threat to the European continent, and this is further complicated by the difficulty of obtaining an early and discriminating diagnosis of infection. Moreover, the possibility of introducing non-endemic pathogens, such as Japanese encephalitis virus (JEV), further complicates accurate diagnosis. Current flavivirus diagnosis is based mainly on RT-PCR and detection of virus-specific antibodies. Yet, both techniques suffer from limitations, and the development of new assays that can provide an early, rapid, low-cost, and discriminating diagnosis of viral infection is warranted. In the pursuit of ideal diagnostic assays, flavivirus non-structural protein 1 (NS1) serves as an excellent target for developing diagnostic assays based on both the antigen itself and the antibodies produced against it. This review describes the potential of such NS1-based diagnostic methods, focusing on the application of flaviviruses that co-circulate in Europe.
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Affiliation(s)
- Martina Ceconi
- Laboratory for Microbiology, Parasitology and Hygiene, Infla-Med Centre of Excellence, University of Antwerp, Antwerp 2610, Belgium
| | - Kevin K Ariën
- Virology Unit, Department of Biomedical Sciences, Institute of Tropical Medicine, Antwerp 2000, Belgium; Department of Biomedical Sciences, University of Antwerp, Antwerp 2610, Belgium
| | - Peter Delputte
- Laboratory for Microbiology, Parasitology and Hygiene, Infla-Med Centre of Excellence, University of Antwerp, Antwerp 2610, Belgium.
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2
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Muslihati A, Septiani NLW, Gumilar G, Nugraha N, Wasisto HS, Yuliarto B. Peptide-Based Flavivirus Biosensors: From Cell Structure to Virological and Serological Detection Methods. ACS Biomater Sci Eng 2024; 10:2041-2061. [PMID: 38526408 DOI: 10.1021/acsbiomaterials.3c01965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/26/2024]
Abstract
In tropical and developing countries, mosquito-borne diseases by flaviviruses pose a serious threat to public health. Early detection is critical for preventing their spread, but conventional methods are time-consuming and require skilled technicians. Biosensors have been developed to address this issue, but cross-reactivity with other flaviviruses remains a challenge. Peptides are essentially biomaterials used in diagnostics that allow virological and serological techniques to identify flavivirus selectively. This biomaterial originated as a small protein consisting of two to 50 amino acid chains. They offer flexibility in chemical modification and can be easily synthesized and applied to living cells in the engineering process. Peptides could potentially be developed as robust, low-cost, sensitive, and selective receptors for detecting flaviviruses. However, modification and selection of the receptor agents are crucial to determine the effectiveness of binding between the targets and the receptors. This paper addresses two potential peptide nucleic acids (PNAs) and affinity peptides that can detect flavivirus from another target-based biosensor as well as the potential peptide behaviors of flaviviruses. The PNAs detect flaviviruses based on the nucleotide base sequence of the target's virological profile via Watson-Crick base pairing, while the affinity peptides sense the epitope or immunological profile of the targets. Recent developments in the functionalization of peptides for flavivirus biosensors are explored in this Review by division into electrochemical, optical, and other detection methods.
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Affiliation(s)
- Atqiya Muslihati
- Doctoral Program of Engineering Physics, Faculty of Industrial Technology, Institut Teknologi Bandung, Ganesha 10, Bandung 40132, Indonesia
- Advanced Functional Material Laboratory, Faculty of Industrial Technology, Institut Teknologi Bandung, Jl. Ganesha No. 10, Bandung 41032, Indonesia
- PT Biostark Analitika Inovasi, Bandung 40375, Indonesia
| | - Ni Luh Wulan Septiani
- Advanced Functional Material Laboratory, Faculty of Industrial Technology, Institut Teknologi Bandung, Jl. Ganesha No. 10, Bandung 41032, Indonesia
- Research Center for Nanotechnology Systems, National Research and Innovation Agency (BRIN), Kawasan Puspiptek, South Tangerang 15134, Indonesia
| | - Gilang Gumilar
- Research Center for Electronics, National Research and Innovation Agency (BRIN), Bandung 40135, Indonesia
| | - Nugraha Nugraha
- Advanced Functional Material Laboratory, Faculty of Industrial Technology, Institut Teknologi Bandung, Jl. Ganesha No. 10, Bandung 41032, Indonesia
- Research Center for Nanosciences and Nanotechnology (RCNN), Institut Teknologi Bandung, Jl. Ganesha No. 10, Bandung 41032, Indonesia
| | | | - Brian Yuliarto
- Advanced Functional Material Laboratory, Faculty of Industrial Technology, Institut Teknologi Bandung, Jl. Ganesha No. 10, Bandung 41032, Indonesia
- Research Center for Nanosciences and Nanotechnology (RCNN), Institut Teknologi Bandung, Jl. Ganesha No. 10, Bandung 41032, Indonesia
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3
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Kapoor T, Murray L, Kuvaldina M, Jiang CS, Peace AA, Agudelo M, Jurado A, Robbiani DF, Klemens O, Lattwein E, Sabalza M, Fallon BA, MacDonald MR. Prevalence of Powassan Virus Seropositivity Among People with History of Lyme Disease and Non-Lyme Community Controls in the Northeastern United States. Vector Borne Zoonotic Dis 2024; 24:226-236. [PMID: 38436222 PMCID: PMC11035843 DOI: 10.1089/vbz.2022.0030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2024] Open
Abstract
Introduction: Lyme disease (LD) affects ∼476,000 people each year in the United States. Symptoms are variable and include rash and flu-like symptoms. Reasons for the wide variation in disease outcomes are unknown. Powassan virus (POWV) is a tick-borne flavivirus that causes disease ranging from asymptomatic infection to encephalitis, neurologic damage, and death. POWV and LD geographic case distributions overlap, with Ixodes species ticks as the common vectors. Clinical ramifications of coinfection or sequential infection are unknown. Objectives: This study's primary objective was to determine the prevalence of POWV-reactive antibodies in sera samples collected from previously studied cohorts of individuals with self-reported LD history residing in the Northeastern United States. As a secondary objective, we studied clinical differences between people with self-reported LD history and low versus high POWV antibody levels. Methods: We used an enzyme-linked immunosorbent assay (ELISA) to quantify IgG directed at the POWV envelope (E) protein domain III in 538 samples from individuals with self-reported LD history and 16 community controls. The samples were also tested with an ELISA assay to quantify IgG directed at the POWV NS1 protein. Results: The percentage of individuals with LD history and possible evidence of POWV exposure varied depending on the assay utilized. We found no significant difference in clinical symptoms between those with low or high POWV IgG levels in the in-house assay. Congruence of the EDIII and NS1 assays was low with only 12% of those positive in the in-house EDIII ELISA testing positive in the POWV NS1 ELISA. Conclusions: The results highlight the difficulty in flavivirus diagnostic testing, particularly in the retrospective detection of flavivirus exposure. The findings suggest that a prospective study with symptomatic patients using approved clinical testing is necessary to address the incidence and clinical implications of LD and POWV co-infection or sequential infection.
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Affiliation(s)
- Tania Kapoor
- Laboratory of Molecular Immunology, The Rockefeller University, New York, New York, USA
| | - Lilly Murray
- Department of Psychiatry, Columbia University, and New York State Psychiatric Institute, New York, New York, USA
| | - Maria Kuvaldina
- Department of Psychiatry, Columbia University, and New York State Psychiatric Institute, New York, New York, USA
| | - Caroline S. Jiang
- Department of Hospital Biostatistics, The Rockefeller University, New York, New York, USA
| | - Avery A. Peace
- Laboratory of Virology and Infectious Disease, The Rockefeller University, New York, New York, USA
| | - Marianna Agudelo
- Laboratory of Molecular Immunology, The Rockefeller University, New York, New York, USA
| | - Andrea Jurado
- Laboratory of Virology and Infectious Disease, The Rockefeller University, New York, New York, USA
| | - Davide F. Robbiani
- Laboratory of Molecular Immunology, The Rockefeller University, New York, New York, USA
| | - Oliver Klemens
- Institute for Experimental Immunology, affiliated to EUROIMMUN Medizinische Labordiagnostika AG, Lübeck, Germany
| | - Erik Lattwein
- Institute for Experimental Immunology, affiliated to EUROIMMUN Medizinische Labordiagnostika AG, Lübeck, Germany
| | | | - Brian A. Fallon
- Department of Psychiatry, Columbia University, and New York State Psychiatric Institute, New York, New York, USA
| | - Margaret R. MacDonald
- Laboratory of Virology and Infectious Disease, The Rockefeller University, New York, New York, USA
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Valle C, Shrestha S, Godeke GJ, Hoogerwerf MN, Reimerink J, Eggink D, Reusken C. Multiplex Serology for Sensitive and Specific Flavivirus IgG Detection: Addition of Envelope Protein Domain III to NS1 Increases Sensitivity for Tick-Borne Encephalitis Virus IgG Detection. Viruses 2024; 16:286. [PMID: 38400061 PMCID: PMC10892675 DOI: 10.3390/v16020286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 01/31/2024] [Accepted: 02/07/2024] [Indexed: 02/25/2024] Open
Abstract
Tick-borne encephalitis is a vaccine-preventable disease of concern for public health in large parts of Europe, with EU notification rates increasing since 2018. It is caused by the orthoflavivirus tick-borne encephalitis virus (TBEV) and a diagnosis of infection is mainly based on serology due to its short viremic phase, often before symptom onset. The interpretation of TBEV serology is hampered by a history of orthoflavivirus vaccination and by previous infections with related orthoflaviviruses. Here, we sought to improve TBEV sero-diagnostics using an antigen combination of in-house expressed NS1 and EDIII in a multiplex, low-specimen-volume set-up for the detection of immune responses to TBEV and other clinically important orthoflaviviruses (i.e., West Nile virus, dengue virus, Japanese encephalitis virus, Usutu virus and Zika virus). We show that the combined use of NS1 and EDIII results in both a specific and sensitive test for the detection of TBEV IgG for patient diagnostics, vaccination responses and in seroprevalence studies. This novel approach potentially allows for a low volume-based, simultaneous analysis of IgG responses to a range of orthoflaviviruses with overlapping geographic circulations and clinical manifestations.
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Affiliation(s)
- Coralie Valle
- Centre for Infectious Disease Control, National Institute for Public Health and the Environment, 3721 MA Bilthoven, The Netherlands (M.N.H.); (J.R.)
- Unité des Virus Emergents (UVE), Aix-Marseille Université, IRD 190, Inserm 1207, 13005 Marseille, France
| | - Sandhya Shrestha
- Centre for Infectious Disease Control, National Institute for Public Health and the Environment, 3721 MA Bilthoven, The Netherlands (M.N.H.); (J.R.)
| | - Gert-Jan Godeke
- Centre for Infectious Disease Control, National Institute for Public Health and the Environment, 3721 MA Bilthoven, The Netherlands (M.N.H.); (J.R.)
| | - Marieke N. Hoogerwerf
- Centre for Infectious Disease Control, National Institute for Public Health and the Environment, 3721 MA Bilthoven, The Netherlands (M.N.H.); (J.R.)
| | - Johan Reimerink
- Centre for Infectious Disease Control, National Institute for Public Health and the Environment, 3721 MA Bilthoven, The Netherlands (M.N.H.); (J.R.)
| | - Dirk Eggink
- Centre for Infectious Disease Control, National Institute for Public Health and the Environment, 3721 MA Bilthoven, The Netherlands (M.N.H.); (J.R.)
| | - Chantal Reusken
- Centre for Infectious Disease Control, National Institute for Public Health and the Environment, 3721 MA Bilthoven, The Netherlands (M.N.H.); (J.R.)
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5
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Castro-Trujillo S, Segura K, Bolívar-Marín S, Salgado DM, Bosch I, Vega R, Rojas MC, Narváez CF. NS1-Specific Antibody Response Facilitates the Identification of Children With Dengue and Zika in Hyperendemic Areas. Pediatr Infect Dis J 2024; 43:178-185. [PMID: 37963312 DOI: 10.1097/inf.0000000000004163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2023]
Abstract
BACKGROUND Infections by dengue virus (DENV) and Zika virus (ZIKV) have some similar symptoms and a cross-reactive immune response, although with different risk populations and outcomes. Here, we evaluated the virologic characteristics and the nonstructural protein 1 (NS1)-specific antibody responses to DENV and ZIKV in children suspected of dengue in different epidemiologic moments in Colombia. METHODS Viral RNA, circulating NS1 and IgM/IgG specific for DENV and ZIKV were performed by reverse transcription-quantitative polymerase chain reaction and enzyme-linked immunosorbent assay (ELISA) in 301 children suspected of dengue enrolled in a hospital setting during the ZIKV epidemic and a primary healthcare setting during a DENV epidemic. For the detection of DENV and ZIKV-specific IgM, an NS1-based ELISA was validated using characterized pediatric samples. Clinical and laboratory parameters were also evaluated. RESULTS DENV RNA or NS1 antigen was detected in the plasma of 62% of children, and in none, the ZIKV RNA was found. NS1-based ELISA for DENV and ZIKV IgM showed a sensitivity/specificity of 90/84% and 73/98%, respectively. Of 114 children without detectable viremia or antigenemia, 30.7%, 17.5%, 22% and 30% were IgM-DENV + , IgM-ZIKV + , IgM-DENV + ZIKV + and IgM-DENV - ZIKV - , respectively. The ZIKV/DENV IgM-NS1 ratio allows the identification of the infecting orthoflavivirus in 88% of the children with IgM-DENV + ZIKV + , confirming a high predominance of DENV infections in the 2 pediatric settings. CONCLUSION Overall, 88% of the children with clinical suspicion of dengue had an identifiable orthoflaviviral infection, with 80% caused by DENV, 7% by ZIKV and 0.7% classified as recent infections or coinfection, demonstrating active viral cocirculation in the pediatric population of southern Colombia. The IgM-NS1 detection improved the identification of orthoflaviviral infections in children without viremia or antigenemia, suggesting it is a helpful complementary tool for medical personnel in tropical regions with high viral cocirculation and different clinical scenes.
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Affiliation(s)
- Sebastián Castro-Trujillo
- From the División de Inmunología, Programa de Medicina, Facultad de Salud, Universidad Surcolombiana, Neiva, Huila, Colombia
| | - Katherine Segura
- Instituto de Genética Humana, Facultad de Medicina, Pontificia Universidad Javeriana, Bogotá, Colombia
- Dirección Laboratorio de Salud Pública, Secretaría de Salud Departamental, Gobernación del Huila, Neiva, Huila, Colombia
| | - Sara Bolívar-Marín
- From the División de Inmunología, Programa de Medicina, Facultad de Salud, Universidad Surcolombiana, Neiva, Huila, Colombia
| | - Doris M Salgado
- Área de Pediatría, Departamento de Ciencias Clínicas, Facultad de Salud, Universidad Surcolombiana, Neiva, Huila, Colombia
| | - Irene Bosch
- Department of Microbiology, Harvard Medical School, Boston, Massachusetts
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology (MIT), Cambridge, Massachusetts, USA
| | - Rocío Vega
- Área de Pediatría, Departamento de Ciencias Clínicas, Facultad de Salud, Universidad Surcolombiana, Neiva, Huila, Colombia
- Departamento de Pediatría, Hospital Universitario de Neiva, Neiva, Huila, Colombia
| | - María Clemencia Rojas
- Dirección Laboratorio de Salud Pública, Secretaría de Salud Departamental, Gobernación del Huila, Neiva, Huila, Colombia
| | - Carlos F Narváez
- Área de Pediatría, Departamento de Ciencias Clínicas, Facultad de Salud, Universidad Surcolombiana, Neiva, Huila, Colombia
- Dirección Laboratorio de Salud Pública, Secretaría de Salud Departamental, Gobernación del Huila, Neiva, Huila, Colombia
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Ackermann-Gäumann R, Lang P, Zens KD. Defining the "Correlate(s) of Protection" to tick-borne encephalitis vaccination and infection - key points and outstanding questions. Front Immunol 2024; 15:1352720. [PMID: 38318179 PMCID: PMC10840404 DOI: 10.3389/fimmu.2024.1352720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Accepted: 01/05/2024] [Indexed: 02/07/2024] Open
Abstract
Tick-borne Encephalitis (TBE) is a severe disease of the Central Nervous System (CNS) caused by the tick-borne encephalitis virus (TBEV). The generation of protective immunity after TBEV infection or TBE vaccination relies on the integrated responses of many distinct cell types at distinct physical locations. While long-lasting memory immune responses, in particular, form the basis for the correlates of protection against many diseases, these correlates of protection have not yet been clearly defined for TBE. This review addresses the immune control of TBEV infection and responses to TBE vaccination. Potential correlates of protection and the durability of protection against disease are discussed, along with outstanding questions in the field and possible areas for future research.
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Affiliation(s)
- Rahel Ackermann-Gäumann
- Microbiologie, ADMED Analyses et Diagnostics Médicaux, La Chaux-de-Fonds, Switzerland
- Swiss National Reference Center for Tick-transmitted Diseases, La Chaux-de-Fonds, Switzerland
| | - Phung Lang
- Epidemiology, Biostatistics and Prevention Institute, University of Zurich, Zurich, Switzerland
| | - Kyra D. Zens
- Epidemiology, Biostatistics and Prevention Institute, University of Zurich, Zurich, Switzerland
- Institute for Experimental Immunology, University of Zurich, Zurich, Switzerland
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7
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Albinsson B, Hoffman T, Kolstad L, Bergström T, Bogdanovic G, Heydecke A, Hägg M, Kjerstadius T, Lindroth Y, Petersson A, Stenberg M, Vene S, Ellström P, Rönnberg B, Lundkvist Å. Seroprevalence of tick-borne encephalitis virus and vaccination coverage of tick-borne encephalitis, Sweden, 2018 to 2019. Euro Surveill 2024; 29:2300221. [PMID: 38214080 PMCID: PMC10785208 DOI: 10.2807/1560-7917.es.2024.29.2.2300221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Accepted: 11/07/2023] [Indexed: 01/13/2024] Open
Abstract
BackgroundIn Sweden, information on seroprevalence of tick-borne encephalitis virus (TBEV) in the population, including vaccination coverage and infection, is scattered. This is largely due to the absence of a national tick-borne encephalitis (TBE) vaccination registry, scarcity of previous serological studies and use of serological methods not distinguishing between antibodies induced by vaccination and infection. Furthermore, the number of notified TBE cases in Sweden has continued to increase in recent years despite increased vaccination.AimThe aim was to estimate the TBEV seroprevalence in Sweden.MethodsIn 2018 and 2019, 2,700 serum samples from blood donors in nine Swedish regions were analysed using a serological method that can distinguish antibodies induced by vaccination from antibodies elicited by infection. The regions were chosen to reflect differences in notified TBE incidence.ResultsThe overall seroprevalence varied from 9.7% (95% confidence interval (CI): 6.6-13.6%) to 64.0% (95% CI: 58.3-69.4%) between regions. The proportion of vaccinated individuals ranged from 8.7% (95% CI: 5.8-12.6) to 57.0% (95% CI: 51.2-62.6) and of infected from 1.0% (95% CI: 0.2-3.0) to 7.0% (95% CI: 4.5-10.7). Thus, more than 160,000 and 1,600,000 individuals could have been infected by TBEV and vaccinated against TBE, respectively. The mean manifestation index was 3.1%.ConclusionA difference was observed between low- and high-incidence TBE regions, on the overall TBEV seroprevalence and when separated into vaccinated and infected individuals. The estimated incidence and manifestation index argue that a large proportion of TBEV infections are not diagnosed.
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Affiliation(s)
- Bo Albinsson
- Zoonosis Science Center, Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden
- These authors contributed equally to the work and share the first authorship
- Laboratory of Clinical Microbiology, Uppsala University Hospital, Uppsala, Sweden
| | - Tove Hoffman
- Zoonosis Science Center, Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden
- These authors contributed equally to the work and share the first authorship
| | - Linda Kolstad
- Zoonosis Science Center, Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden
| | - Tomas Bergström
- Department of Infectious Diseases, Institute of Biomedicine, University of Gothenburg, Gothenburg, Sweden
| | - Gordana Bogdanovic
- Department of Clinical Microbiology, Karolinska University Hospital, Stockholm, Sweden
| | - Anna Heydecke
- Centre for Research and Development, Uppsala University, Region Gävleborg, Gävle, Sweden
| | - Mirja Hägg
- Department of Clinical Microbiology, Karolinska University Hospital, Stockholm, Sweden
| | | | - Ylva Lindroth
- Department of Laboratory Medicine, Medical Microbiology, Lund University, Skåne Laboratory Medicine, Lund, Sweden
| | - Annika Petersson
- Department of Clinical Chemistry and Transfusion Medicine, Växjö Central Hospital, Växjö, Sweden
| | - Marie Stenberg
- Laboratory Medical Center Gotland, Visby hospital, Visby, Sweden
| | - Sirkka Vene
- Zoonosis Science Center, Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden
| | - Patrik Ellström
- Laboratory of Clinical Microbiology, Uppsala University Hospital, Uppsala, Sweden
- Zoonosis Science Center, Department of Medical Sciences, Uppsala University, Uppsala, Sweden
| | - Bengt Rönnberg
- Zoonosis Science Center, Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden
- Laboratory of Clinical Microbiology, Uppsala University Hospital, Uppsala, Sweden
| | - Åke Lundkvist
- Zoonosis Science Center, Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden
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Ackermann-Gäumann R, Brêchet A, Smetana J, Salát J, Lienhard R, Croxatto A, Polcarová P, Chlíbek R, Růžek D. Vaccination against tick-borne encephalitis elicits a detectable NS1 IgG antibody response. J Virol Methods 2023; 322:114831. [PMID: 37838083 DOI: 10.1016/j.jviromet.2023.114831] [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: 07/19/2023] [Revised: 10/10/2023] [Accepted: 10/11/2023] [Indexed: 10/16/2023]
Abstract
Vaccine-induced protection against tick-borne encephalitis virus (TBEV) is mediated by antibodies to the viral particle/envelope protein. The detection of non-structural protein 1 (NS1) specific antibodies has been suggested as a marker indicative of natural infections. However, recent work has shown that TBEV vaccines contain traces of NS1, and immunization of mice induced low amounts of NS1-specific antibodies. In this study, we investigated if vaccination induces TBEV NS1-specific antibodies in humans. Healthy army members (n = 898) were asked to fill in a questionnaire relating to flavivirus vaccination or infection, and blood samples were collected. In addition, samples of 71 suspected acute TBE cases were included. All samples were screened for the presence of TBEV NS1-specific IgG antibodies using an in-house developed ELISA. Antibodies were quantified as percent positivity in reference to a positive control. For qualitative evaluation, cut-off for positivity was defined based on the mean OD of the lower 95% of the vaccinated individuals + 3 SD. We found significantly higher NS1-specific IgG antibody titers (i.e., quantitative evaluation) in individuals having received 2, 3, or 4 or more vaccine doses than in non-vaccinated individuals. Similarly, the percentage of individuals with a positive test result (i.e., qualitative evaluation) was higher in individuals vaccinated against tick-borne encephalitis than in unvaccinated study participants. Although NS1-specific IgG titers remained at a relatively low level when compared to TBE patients, a clear distinction was not always possible. Establishing a clear cut-off point in detection systems is critical for NS1-specific antibodies to serve as a marker for distinguishing the immune response after vaccination and infection.
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Affiliation(s)
- Rahel Ackermann-Gäumann
- Microbiologie, ADMED Analyses et Diagnostics Médicaux, La Chaux-de-Fonds, Switzerland; Swiss National Reference Center for Tick-Transmitted Diseases, Switzerland.
| | - Arthur Brêchet
- Microbiologie, ADMED Analyses et Diagnostics Médicaux, La Chaux-de-Fonds, Switzerland
| | - Jan Smetana
- Faculty of Military Health Sciences, University of Defence, Hradec Kralove, Czech Republic
| | - Jiři Salát
- Laboratory of Emerging Viral Infections, Veterinary Research Institute, Brno, Czech Republic; Laboratory of Arbovirology, Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, Ceske Budejovice, Czech Republic; Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Reto Lienhard
- Microbiologie, ADMED Analyses et Diagnostics Médicaux, La Chaux-de-Fonds, Switzerland; Swiss National Reference Center for Tick-Transmitted Diseases, Switzerland
| | - Antony Croxatto
- Microbiologie, ADMED Analyses et Diagnostics Médicaux, La Chaux-de-Fonds, Switzerland; Swiss National Reference Center for Tick-Transmitted Diseases, Switzerland
| | - Petra Polcarová
- Faculty of Military Health Sciences, University of Defence, Hradec Kralove, Czech Republic
| | - Roman Chlíbek
- Faculty of Military Health Sciences, University of Defence, Hradec Kralove, Czech Republic
| | - Daniel Růžek
- Laboratory of Emerging Viral Infections, Veterinary Research Institute, Brno, Czech Republic; Laboratory of Arbovirology, Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, Ceske Budejovice, Czech Republic; Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic
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9
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Bernardo-Menezes LC, Agrelli A, Oliveira ASLED, Azevedo EDAN, Morais CNLD. Zika virus: Critical crosstalk between pathogenesis, cytopathic effects, and macroautophagy. J Cell Biochem 2023. [PMID: 37334850 DOI: 10.1002/jcb.30438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 05/06/2023] [Accepted: 06/06/2023] [Indexed: 06/21/2023]
Abstract
Zika virus (ZIKV) is a re-emerging positive-sense RNA arbovirus. Its genome encodes a polyprotein that is cleaved by proteases into three structural proteins (Envelope, pre-Membrane, and Capsid) and seven nonstructural proteins (NS1, NS2A, NS2B, NS3, NS4A, NS4B, and NS5). These proteins have essential functions in viral replication cycle, cytopathic effects, and host cellular response. When infected by ZIKV, host cells promote macroautophagy, which is believed to favor virus entry. Although several authors have attempted to understand this link between macroautophagy and viral infection, little is known. Herein, we performed a narrative review of the molecular connection between macroautophagy and ZIKV infection while focusing on the roles of the structural and nonstructural proteins. We concluded that ZIKV proteins are major virulence factors that modulate host-cell machinery to its advantage by disrupting and/or blocking specific cellular systems and organelles' function, such as endoplasmic reticulum stress and mitochondrial dysfunction.
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Affiliation(s)
- Lucas Coêlho Bernardo-Menezes
- Laboratory of Virology and Experimental Therapeutics (LaViTE), Aggeu Magalhães Institute, Oswaldo Cruz Foundation (Fiocruz), Recife, Pernambuco, Brazil
| | - Almerinda Agrelli
- Laboratory of Nanostructured Materials (LMNANO), Strategic Technologies Center of Northeast (CETENE), Recife, Pernambuco, Brazil
| | | | - Elisa de Almeida Neves Azevedo
- Laboratory of Virology and Experimental Therapeutics (LaViTE), Aggeu Magalhães Institute, Oswaldo Cruz Foundation (Fiocruz), Recife, Pernambuco, Brazil
| | - Clarice Neuenschwander Lins de Morais
- Laboratory of Virology and Experimental Therapeutics (LaViTE), Aggeu Magalhães Institute, Oswaldo Cruz Foundation (Fiocruz), Recife, Pernambuco, Brazil
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Malnero CM, Azevedo RC, Bergmann IE, de Meneses MDF, Cavalcanti AC, Ibáñez LI, Malirat V. Expression of recombinant dengue virus type 1 non-structural protein 1 in mammalian cells and preliminary assessment of its suitability to detect human IgG antibodies elicited by viral infection. J Immunol Methods 2023; 518:113503. [PMID: 37263391 DOI: 10.1016/j.jim.2023.113503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 05/18/2023] [Accepted: 05/25/2023] [Indexed: 06/03/2023]
Abstract
In recent years dengue has become a rapidly growing public health problem worldwide, however, the availability of accurate and affordable diagnostic immunoassays is limited, partly due to the difficulty of producing large quantities of purified antigen. Non-structural protein 1 (NS1) has shown to be a good candidate for inclusion in diagnostic assays and for serosurveys, particularly in endemic countries as a prerequisite for vaccination. In this work the NS1 antigen derived from dengue virus type-1 (DENV1) was expressed in HEK293-T cells and purified by affinity chromatography. The recombinant protein was recovered properly folded as dimers, highly purified and with good yield (1.5 mg/L). It was applied as a serological probe in an indirect ELISA developed in this work to detect human IgG antibodies. Preliminary comparative performance values of 81.1% sensitivity and 83.0% specificity of the developed and preliminary validated iELISA, relative to a commercial kit were obtained, suggesting that the purified recombinant DENV1 NS1 antigen is suitable to detect IgG antibodies, indicative of past DENV infection.
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Affiliation(s)
- Cristian Miguel Malnero
- Centro de Virología Humana y Animal (CEVHAN), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Abierta Interamericana (UAI), Buenos Aires C1287, Argentina
| | - Renata Campos Azevedo
- Department of Virology, Institute of Microbiology Paulo de Góes, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Ingrid Evelyn Bergmann
- Centro de Virología Humana y Animal (CEVHAN), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Abierta Interamericana (UAI), Buenos Aires C1287, Argentina
| | | | - Andrea Cony Cavalcanti
- Department of Virology, Institute of Microbiology Paulo de Góes, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil; Central Laboratory of Public Health Noel Nutels (LACEN-RJ), Rio de Janeiro, Brazil
| | - Lorena Itatí Ibáñez
- Instituto de Química Física de los Materiales, Medio Ambiente y Energía (INQUIMAE), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad de Buenos Aires (UBA), Buenos Aires C1428EGA, Argentina
| | - Viviana Malirat
- Centro de Virología Humana y Animal (CEVHAN), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Abierta Interamericana (UAI), Buenos Aires C1287, Argentina.
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11
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Dias BDP, Barbosa CC, Ferreira CS, Mayra Soares Alves Dos Santos S, Arrieta OAP, Malta WC, Gomes MLMD, Alves E Silva M, Fonseca JDM, Borges LP, Silva BDM. Challenges in Direct Detection of Flaviviruses: A Review. Pathogens 2023; 12:pathogens12050643. [PMID: 37242313 DOI: 10.3390/pathogens12050643] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 04/18/2023] [Accepted: 04/20/2023] [Indexed: 05/28/2023] Open
Abstract
Arthropods transmit arboviruses via mosquito and tick bites to humans and other animals. The genus flavivirus, which causes diseases, sequelae, and thousands of deaths, mainly in developing and underdeveloped countries, is among the arboviruses of interest to public health. Given the importance of early and accurate diagnosis, this review analyzes the methods of direct detection of flaviviruses, such as reverse transcription loop-mediated isothermal amplification, microfluidics, localized surface plasmon resonance, and surface-enhanced Raman scattering, and presents the advantages, disadvantages, and detection limits identified in studies reported in the literature for each methodology. Among the different methods available, it is essential to balance four fundamental indicators to determine the ideal test: good sensitivity, high specificity, low false positive rate, and rapid results. Among the methods analyzed, reverse transcription loop-mediated isothermal amplification stands out, owing to result availability within a few minutes, with good sensitivity and specificity; in addition, it is the best-characterized methodology.
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Affiliation(s)
- Bruna de Paula Dias
- Department of Biological Sciences, Federal University of Ouro Preto, Ouro Preto 35400-000, Brazil
| | - Camila Cavadas Barbosa
- Department of Biological Sciences, Federal University of Ouro Preto, Ouro Preto 35400-000, Brazil
| | - Cyntia Silva Ferreira
- Department of Biological Sciences, Federal University of Ouro Preto, Ouro Preto 35400-000, Brazil
| | | | | | | | | | - Mariela Alves E Silva
- Department of Biological Sciences, Federal University of Ouro Preto, Ouro Preto 35400-000, Brazil
| | - Júlia de Matos Fonseca
- Department of Biological Sciences, Federal University of Ouro Preto, Ouro Preto 35400-000, Brazil
| | - Lysandro Pinto Borges
- Department of Pharmacy, Federal University of Sergipe, São Cristóvão 9100-000, Brazil
| | - Breno de Mello Silva
- Department of Biological Sciences, Federal University of Ouro Preto, Ouro Preto 35400-000, Brazil
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12
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Coronel-Ruiz C, Velandia-Romero ML, Calvo E, Camacho-Ortega S, Parra-Alvarez S, Beltrán EO, Calderón-Pelaez MA, Porras-Ramírez A, Cortés-Muñoz F, Rojas-Hernandez JP, Velasco-Alvarez S, Pinzón-Junca A, Castellanos JE. Improving dengue diagnosis and case confirmation in children by combining rapid diagnostic tests, clinical, and laboratory variables. FRONTIERS IN TROPICAL DISEASES 2023. [DOI: 10.3389/fitd.2023.1118774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/22/2023] Open
Abstract
BackgroundDengue is the most widely distributed arboviral disease in tropical and subtropical countries. Most suspected cases are diagnosed according to the clinical criteria, and early diagnosis is difficult. Moreover, in underdeveloped countries, several factors continue to challenge the diagnosis and surveillance of dengue cases. This study aimed to design a diagnostic algorithm using rapid diagnostic tests (RDTs), ELISA tests, and clinical and hematological variables to confirm dengue cases in febrile patients in Colombia.MethodsAltogether, 505 samples were collected. Serum samples were evaluated by RDTs (IgM and IgG antibodies and NS1 antigen), capture IgM and IgG ELISAs, and endpoint hemi-nested RT-PCR assay (qualitative). We statistically analyzed the performance of individual tests to determine the most useful ones to confirm dengue cases accurately.ResultsIndividual results for IgM, IgG, and NS1 RDTs yielded lower sensitivity and specificity values than the reference standard. High sensitivity and specificity were obtained after combining IgM and NS1 ELISA results (96.3% and 96.4%) and NS1 RDT plus IgM ELISA results (90.3% and 96.2%), respectively. Adjusted odds ratios (aORs) were calculated for clinical variables and laboratory tests to differentiate dengue from other febrile illnesses (OFI). This approach showed that myalgia, abdominal tenderness, and platelet count were identified with higher sensitivity to confirm dengue cases. IgM RDT and NS1 RDT differentiated dengue cases from OFI. A positive IgM RDT or a positive NS1 RDT combined with specific signs or symptoms confirmed 81.6% of dengue cases. A combination of clinical findings and a positive NS1 RDT or positive ELISA IgM confirmed 90.6% of the cases.ConclusionOur findings showed that clinical diagnoses in pediatric population alone cannot confirm true dengue cases and needs to be complemented by laboratory diagnostic tests. We also demonstrate the usefulness of combining clinical criteria with RDTs, suggesting that their implementation with the IgM ELISA test improves dengue case confirmation.
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13
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Prudencio CR, Gomes da Costa V, Rocha LB, da Costa HHM, Orts DJB, da Silva Santos FR, Rahal P, Lino NAB, da Conceição PJP, Bittar C, Machado RRG, Durigon EL, Araujo JP, Polatto JM, da Silva MA, de Oliveira JA, Mitsunari T, Pereira LR, Andreata-Santos R, de Souza Ferreira LC, Luz D, Piazza RMF. Identification of Zika Virus NS1-Derived Peptides with Potential Applications in Serological Tests. Viruses 2023; 15:v15030654. [PMID: 36992364 PMCID: PMC10052002 DOI: 10.3390/v15030654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 02/14/2023] [Accepted: 02/23/2023] [Indexed: 03/05/2023] Open
Abstract
Zika virus (ZIKV), a mosquito-borne pathogen, is an emerging arbovirus associated with sporadic symptomatic cases of great medical concern, particularly among pregnant women and newborns affected with neurological disorders. Serological diagnosis of ZIKV infection is still an unmet challenge due to the co-circulation of the dengue virus, which shares extensive sequence conservation of structural proteins leading to the generation of cross-reactive antibodies. In this study, we aimed to obtain tools for the development of improved serological tests for the detection of ZIKV infection. Polyclonal sera (pAb) and a monoclonal antibody (mAb 2F2) against a recombinant form of the ZIKV nonstructural protein 1 (NS1) allowed the identification of linear peptide epitopes of the NS1 protein. Based on these findings, six chemically synthesized peptides were tested both in dot blot and ELISA assays using convalescent sera collected from ZIKV-infected patients. Two of these peptides specifically detected the presence of ZIKV antibodies and proved to be candidates for the detection of ZIKV-infected subjects. The availability of these tools opens perspectives for the development of NS1-based serological tests with enhanced sensitivity regarding other flaviviruses.
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Affiliation(s)
- Carlos Roberto Prudencio
- Laboratório de Imunobiotecnologia, Centro de Imunologia, Instituto Adolfo Lutz, Av. Dr. Arnaldo, 351, São Paulo 01246-902, SP, Brazil
- Correspondence: (C.R.P.); (D.L.); (R.M.F.P.); Tel.: +55-11-3068-2886 (C.R.P.); +55-11-2627-9708 (D.L.); +55-11-2627-9724 (R.M.F.P.)
| | - Vivaldo Gomes da Costa
- Instituto de Biociências Letras e Ciências Exatas, Universidade Estadual Paulista Júlio de Mesquita Filho, Rua Cristóvão Colombo, 2265, São Jose do Rio Preto 15054-000, SP, Brazil
| | - Leticia Barboza Rocha
- Laboratório de Bacteriologia, Instituto Butantan, Av. Vital Brazil, 1500, São Paulo 05503-900, SP, Brazil
| | - Hernan Hermes Monteiro da Costa
- Laboratório de Imunobiotecnologia, Centro de Imunologia, Instituto Adolfo Lutz, Av. Dr. Arnaldo, 351, São Paulo 01246-902, SP, Brazil
| | - Diego José Belato Orts
- Laboratório de Imunobiotecnologia, Centro de Imunologia, Instituto Adolfo Lutz, Av. Dr. Arnaldo, 351, São Paulo 01246-902, SP, Brazil
| | - Felipe Rocha da Silva Santos
- Laboratório de Imunobiotecnologia, Centro de Imunologia, Instituto Adolfo Lutz, Av. Dr. Arnaldo, 351, São Paulo 01246-902, SP, Brazil
| | - Paula Rahal
- Instituto de Biociências Letras e Ciências Exatas, Universidade Estadual Paulista Júlio de Mesquita Filho, Rua Cristóvão Colombo, 2265, São Jose do Rio Preto 15054-000, SP, Brazil
| | - Nikolas Alexander Borsato Lino
- Instituto de Biociências Letras e Ciências Exatas, Universidade Estadual Paulista Júlio de Mesquita Filho, Rua Cristóvão Colombo, 2265, São Jose do Rio Preto 15054-000, SP, Brazil
| | - Pâmela Jóyce Previdelli da Conceição
- Instituto de Biociências Letras e Ciências Exatas, Universidade Estadual Paulista Júlio de Mesquita Filho, Rua Cristóvão Colombo, 2265, São Jose do Rio Preto 15054-000, SP, Brazil
| | - Cintia Bittar
- Instituto de Biociências Letras e Ciências Exatas, Universidade Estadual Paulista Júlio de Mesquita Filho, Rua Cristóvão Colombo, 2265, São Jose do Rio Preto 15054-000, SP, Brazil
| | - Rafael Rahal Guaragna Machado
- Departamento de Microbiologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo 05508-000, SP, Brazil
| | - Edison Luiz Durigon
- Departamento de Microbiologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo 05508-000, SP, Brazil
| | - João Pessoa Araujo
- Instituto de Biotecnologia, Universidade Estadual Paulista Júlio de Mesquita Filho, Botucatu 18607-440, SP, Brazil
| | - Juliana Moutinho Polatto
- Laboratório de Bacteriologia, Instituto Butantan, Av. Vital Brazil, 1500, São Paulo 05503-900, SP, Brazil
| | - Miriam Aparecida da Silva
- Laboratório de Bacteriologia, Instituto Butantan, Av. Vital Brazil, 1500, São Paulo 05503-900, SP, Brazil
| | - Joyce Araújo de Oliveira
- Laboratório de Bacteriologia, Instituto Butantan, Av. Vital Brazil, 1500, São Paulo 05503-900, SP, Brazil
| | - Thais Mitsunari
- Laboratório de Bacteriologia, Instituto Butantan, Av. Vital Brazil, 1500, São Paulo 05503-900, SP, Brazil
| | - Lennon Ramos Pereira
- Departamento de Microbiologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo 05508-000, SP, Brazil
| | - Robert Andreata-Santos
- Departamento de Microbiologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo 05508-000, SP, Brazil
| | - Luís Carlos de Souza Ferreira
- Departamento de Microbiologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo 05508-000, SP, Brazil
- Plataforma Científica Pasteur USP, Universidade de São Paulo, São Paulo 05508-000, SP, Brazil
| | - Daniela Luz
- Laboratório de Bacteriologia, Instituto Butantan, Av. Vital Brazil, 1500, São Paulo 05503-900, SP, Brazil
- Correspondence: (C.R.P.); (D.L.); (R.M.F.P.); Tel.: +55-11-3068-2886 (C.R.P.); +55-11-2627-9708 (D.L.); +55-11-2627-9724 (R.M.F.P.)
| | - Roxane Maria Fontes Piazza
- Laboratório de Bacteriologia, Instituto Butantan, Av. Vital Brazil, 1500, São Paulo 05503-900, SP, Brazil
- Correspondence: (C.R.P.); (D.L.); (R.M.F.P.); Tel.: +55-11-3068-2886 (C.R.P.); +55-11-2627-9708 (D.L.); +55-11-2627-9724 (R.M.F.P.)
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14
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da Silva AG, Goulart LR, Löffler P, Code C, Neves AF. Development of a Molecular Aptamer Beacon Applied to Magnetic-Assisted RNA Extraction for Detection of Dengue and Zika Viruses Using Clinical Samples. Int J Mol Sci 2022; 23:ijms232213866. [PMID: 36430340 PMCID: PMC9693377 DOI: 10.3390/ijms232213866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 10/27/2022] [Accepted: 11/03/2022] [Indexed: 11/12/2022] Open
Abstract
Limitations in the detection of cocirculating flaviviruses such as Dengue and Zika lead us to propose the use of aptameric capture of the viral RNA in combination with RT-PCR (APTA-RT-PCR). Aptamers were obtained via SELEX and next-generation sequencing, followed by colorimetric and fluorescent characterizations. An APTA-RT-PCR assay was developed, optimized, and tested against the viral RNAs in 108 serum samples. After selection, sequence APTAZC10 was designed as a bifunctional molecular beacon (APTAZC10-MB), exhibiting affinity for the viral targets. APTA-RT-PCR was able to detect Dengue and Zika RNA in 43% and 8% of samples, respectively. Our results indicate that APTAZC10-MB and APTA-RT-PCR will be useful to improve the detection of Dengue and Zika viruses in a fast molecular assay for the improvement of infectious disease surveillance.
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Affiliation(s)
- Amanda Gabrielle da Silva
- Institute of Physics, Postgraduate Program in Exact and Technological Sciences, Universidade Federal de Catalão, Catalão 75704-020, Brazil
| | - Luiz Ricardo Goulart
- Nanobiotechnology Laboratory, Institute of Biotechnology, Universidade Federal de Uberlândia, Uberlândia 38402-022, Brazil
| | - Philipp Löffler
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, Campusvej 55, 5230 Odense, Denmark
| | - Christian Code
- Dianox ApS, Fruebjergvej 3, 2100 København, Denmark
- PhyLife Physical Life Sciences, Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, Campusvej 55, 5230 Odense, Denmark
| | - Adriana Freitas Neves
- Institute of Biotechnology, Molecular Biology Laboratory, Universidade Federal de Catalão, Catalão 75704-020, Brazil
- Correspondence:
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15
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Saivish MV, Menezes GDL, da Costa VG, da Silva GCD, Marques RE, Nogueira ML, Silva RAD. Predicting Antigenic Peptides from Rocio Virus NS1 Protein for Immunodiagnostic Testing Using Immunoinformatics and Molecular Dynamics Simulation. Int J Mol Sci 2022; 23:7681. [PMID: 35887029 PMCID: PMC9322101 DOI: 10.3390/ijms23147681] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Revised: 07/02/2022] [Accepted: 07/06/2022] [Indexed: 12/10/2022] Open
Abstract
The mosquito-borne disease caused by the Rocio virus is a neglected threat, and new immune inputs for serological testing are urgently required for diagnosis in low-resource settings and epidemiological surveillance. We used in silico approaches to identify a specific antigenic peptide (p_ROCV2) in the NS1 protein of the Rocio virus that was theoretically predicted to be stable and exposed on its surface, where it demonstrated key properties allowing it to interact with antibodies. These findings related to the molecular dynamics of this peptide provide important insights for advancing diagnostic platforms and investigating therapeutic alternatives.
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Affiliation(s)
- Marielena Vogel Saivish
- Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto (FAMERP), São José do Rio Preto 15090-000, SP, Brazil; (M.V.S.); (G.C.D.d.S.)
- Laboratório Nacional de Biociências, Centro Nacional de Pesquisa em Energia e Materiais (CNPEM), Campinas 13083-100, SP, Brazil;
| | - Gabriela de Lima Menezes
- Núcleo Colaborativo de Biosistemas, Universidade Federal de Jataí, Jataí 75801-615, GO, Brazil;
- Bioinformatics Multidisciplinary Environment, Programa de Pós Graduação em Bioinformática, Universidade Federal do Rio Grande do Norte, Natal 59078-400, RN, Brazil
| | - Vivaldo Gomes da Costa
- Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista (UNESP), São José do Rio Preto 15054-000, SP, Brazil;
| | - Gislaine Celestino Dutra da Silva
- Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto (FAMERP), São José do Rio Preto 15090-000, SP, Brazil; (M.V.S.); (G.C.D.d.S.)
| | - Rafael Elias Marques
- Laboratório Nacional de Biociências, Centro Nacional de Pesquisa em Energia e Materiais (CNPEM), Campinas 13083-100, SP, Brazil;
| | - Maurício Lacerda Nogueira
- Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto (FAMERP), São José do Rio Preto 15090-000, SP, Brazil; (M.V.S.); (G.C.D.d.S.)
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16
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Ward D, Gomes AR, Tetteh KKA, Sepúlveda N, Gomez LF, Campino S, Clark TG. Sero-epidemiological study of arbovirus infection following the 2015-2016 Zika virus outbreak in Cabo Verde. Sci Rep 2022; 12:11719. [PMID: 35810191 PMCID: PMC9271056 DOI: 10.1038/s41598-022-16115-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Accepted: 07/05/2022] [Indexed: 11/09/2022] Open
Abstract
In November 2015, cases of Zika virus infection were recorded in Cabo Verde (Africa), originating from Brazil. The outbreak subsided after seven months with 7580 suspected cases. We performed a serological survey (n = 431) in Praia, the capital city, 3 months after transmission ceased. Serum samples were screened for arbovirus antibodies using ELISA techniques and revealed seroconverted individuals with Zika (10.9%), dengue (1-4) (12.5%), yellow fever (0.2%) and chikungunya (2.6%) infections. Zika seropositivity was predominantly observed amongst females (70%). Using a logistic model, risk factors for increased odds of Zika seropositivity included age, self-reported Zika infection, and dengue seropositivity. Serological data from Zika and dengue virus assays were strongly correlated (Spearman's rs = 0.80), which reduced when using a double antigen binding ELISA (Spearman's rs = 0.54). Overall, our work improves an understanding of how Zika and other arboviruses have spread throughout the Cabo Verde population. It also demonstrates the utility of serological assay formats for outbreak investigations.
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Affiliation(s)
- Daniel Ward
- Department of Infection Biology, London School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, UK
| | | | - Kevin K A Tetteh
- Department of Infection Biology, London School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, UK
| | - Nuno Sepúlveda
- Warsaw University of Technology, Warsaw, Poland
- Universidade de Lisboa, Lisbon, Portugal
| | | | - Susana Campino
- Department of Infection Biology, London School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, UK
| | - Taane G Clark
- Department of Infection Biology, London School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, UK.
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17
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Salat J, Strakova P, Ruzek D. Dynamics of Whole Virus and Non-Structural Protein 1 (NS1) IgG Response in Mice Immunized with Two Commercial Tick-Borne Encephalitis Vaccines. Vaccines (Basel) 2022; 10:vaccines10071001. [PMID: 35891164 PMCID: PMC9320558 DOI: 10.3390/vaccines10071001] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 06/18/2022] [Accepted: 06/19/2022] [Indexed: 01/27/2023] Open
Abstract
The presence of a non-structural protein 1 (NS1) in tick-borne encephalitis (TBE) vaccines and the possible induction of an NS1-specific immune response in vaccinated individuals remains a somewhat controversial topic. Previously, we detected the presence of NS1 in the Encepur TBE vaccine by mass spectrometry and found the induction of NS1-specific IgG antibodies in mice vaccinated with the FSME-Immun TBE vaccine. Here, in this follow-up study, we examined the dynamics and extent of the NS1-specific IgG response in mice vaccinated with these two vaccines in more detail and compared it with the IgG response to the whole virus (WV). Mice were vaccinated at two-week intervals with a total of six doses of each vaccine, and levels of IgG antibodies to TBE virus WV and NS1 were measured by ELISA after each dose. Both vaccines elicited a robust anti-WV IgG response after two doses. The Encepur vaccine did not elicit NS1-specific IgG even after all six doses. In contrast, the FSME-Immun vaccine triggered the production of NS1-specific IgG after four doses. The results indicate that FSME-Immun is the only vaccine that elicits an NS1-specific antibody response in mice. However, compared to WV-specific IgG, the NS1-specific response is weaker, and a higher number of doses is required to induce detectable levels of NS1-specific IgG antibodies.
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Affiliation(s)
- Jiri Salat
- Laboratory of Emerging Viral Infections, Veterinary Research Institute, Hudcova 70, CZ-62100 Brno, Czech Republic;
- Laboratory of Arbovirology, Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, Branisovska 31, CZ-37005 Ceske Budejovice, Czech Republic
- Correspondence: (J.S.); (D.R.)
| | - Petra Strakova
- Laboratory of Emerging Viral Infections, Veterinary Research Institute, Hudcova 70, CZ-62100 Brno, Czech Republic;
- Laboratory of Arbovirology, Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, Branisovska 31, CZ-37005 Ceske Budejovice, Czech Republic
| | - Daniel Ruzek
- Laboratory of Emerging Viral Infections, Veterinary Research Institute, Hudcova 70, CZ-62100 Brno, Czech Republic;
- Laboratory of Arbovirology, Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, Branisovska 31, CZ-37005 Ceske Budejovice, Czech Republic
- Department of Experimental Biology, Faculty of Science, Masaryk University, Kamenice 735/5, CZ-62500 Brno, Czech Republic
- Correspondence: (J.S.); (D.R.)
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18
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Könenkamp L, Ziegler U, Naucke T, Groschup MH, Steffen I. Antibody ratios against NS1 antigens of tick-borne encephalitis and West Nile viruses support differential flavivirus serology in dogs. Transbound Emerg Dis 2022; 69:e2789-e2799. [PMID: 35704505 DOI: 10.1111/tbed.14630] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 05/06/2022] [Accepted: 06/13/2022] [Indexed: 12/01/2022]
Abstract
Flavivirus diagnostics are complicated by substantial cross-reactivity of antibodies between different flavivirus species. This is of particular importance in regions with multiple endemic flaviviruses in co-circulation. Tick-borne encephalitis virus (TBEV) is the causative agent of tick-borne encephalitis, the most common infection of the central nervous system in endemic regions of Europe and Asia. Since 2018, the related West Nile virus (WNV) has spread to Germany where its geographic distribution overlaps with TBEV endemic regions. Besides humans, various animal species are susceptible to TBEV and WNV infection. To compare antibody responses against these flaviviruses and test for cross-reactivity, we developed a multi-species luciferase immunoprecipitation system antibody detection assay for several different antigens. We performed a serosurvey of 682 dogs from five different European countries to detect antibodies against TBEV and WNV. Twelve specimens were positive for TBEV NS1 only and seven for WNV NS1 only. Two specimens were reactive to both NS1 antigens and another two were equivocal for WNV NS1. Interestingly, 89.5% of positive specimens had TBEV/WNV or WNV/TBEV signal ratios of 10 to >300 between individual NS1 antigens, allowing for a clear distinction between the two viruses. The remaining 10.5% of reactive specimens showed a five- to 10-fold difference between the two viruses and included possible dual exposures to both viruses. In contrast, equivocal samples showed low signal ratios between the NS1 antigens, suggesting unspecific reactivity. Based on these data, we found the NS1 protein to be a suitable antigen to distinguish between TBEV- and WNV-specific antibodies in dogs with sensitivity and specificity similar to virus neutralization tests.
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Affiliation(s)
- Laura Könenkamp
- Institute for Biochemistry, University of Veterinary Medicine, Hannover, Germany.,Research Center for Emerging Infections and Zoonoses, University of Veterinary Medicine, Hannover, Germany
| | - Ute Ziegler
- Friedrich-Loeffler-Institut, Institute of Novel and Emerging Infectious Diseases, Greifswald-Insel Riems, Germany
| | | | - Martin H Groschup
- Friedrich-Loeffler-Institut, Institute of Novel and Emerging Infectious Diseases, Greifswald-Insel Riems, Germany
| | - Imke Steffen
- Institute for Biochemistry, University of Veterinary Medicine, Hannover, Germany.,Research Center for Emerging Infections and Zoonoses, University of Veterinary Medicine, Hannover, Germany
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19
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Laboratory Findings in Patients with Probable Dengue Diagnosis from an Endemic Area in Colombia in 2018. Viruses 2021; 13:v13071401. [PMID: 34372606 PMCID: PMC8310201 DOI: 10.3390/v13071401] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 07/15/2021] [Accepted: 07/15/2021] [Indexed: 11/17/2022] Open
Abstract
As demonstrated with the novel coronavirus pandemic, rapid and accurate diagnosis is key to determine the clinical characteristic of a disease and to improve vaccine development. Once the infected person is identified, hematological findings may be used to predict disease outcome and offer the correct treatment. Rapid and accurate diagnosis and clinical parameters are pivotal to track infections during clinical trials and set protection status. This is also applicable for re-emerging diseases like dengue fever, which causes outbreaks in Asia and Latin America every 4 to 5 years. Some areas in the US are also endemic for the transmission of dengue virus (DENV), the causal agent of dengue fever. However, significant number of DENV infections in rural areas are diagnosed solely by clinical and hematological findings because of the lack of availability of ELISA or PCR-based tests or the infrastructure to implement them in the near future. Rapid diagnostic tests (RDT) are a less sensitive, yet they represent a timely way of detecting DENV infections. The purpose of this study was to determine whether there is an association between hematological findings and the probability for an NS1-based DENV RDT to detect the DENV NS1 antigen. We also aimed to describe the hematological parameters that are associated with the diagnosis through each test.
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Dynamics and Extent of Non-Structural Protein 1-Antibody Responses in Tick-Borne Encephalitis Vaccination Breakthroughs and Unvaccinated Patients. Viruses 2021; 13:v13061007. [PMID: 34072119 PMCID: PMC8228328 DOI: 10.3390/v13061007] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 05/21/2021] [Accepted: 05/26/2021] [Indexed: 12/16/2022] Open
Abstract
Tick-borne encephalitis (TBE) has a substantial impact on human public health in many parts of Europe and Asia. Effective inactivated purified whole-virus vaccines are in widespread use in TBE-endemic countries. Nevertheless, vaccination breakthroughs (VBTs) with manifest clinical disease do occur, and their specific serodiagnosis was shown to be facilitated by the detection of antibodies to a non-structural protein (NS1) that is produced during virus replication. However, recent data have shown that NS1 is also present in the current inactivated vaccines, with the potential of inducing corresponding antibodies and obscuring a proper interpretation of NS1-antibody assays for diagnosing VBTs. In our study, we quantified anti-virion and anti-NS1 antibody responses after vaccination as well as after natural infection in TBE patients, both without and with a history of previous TBE vaccination (VBTs). We did not find significant levels of NS1-specific antibodies in serum samples from 48 vaccinees with a completed vaccination schedule. In contrast, all TBE patients mounted an anti-NS1 antibody response, irrespective of whether they were vaccinated or not. Neither the dynamics nor the extent of NS1-antibody formation differed significantly between the two cohorts, arguing against substantial NS1-specific priming and an anamnestic NS1-antibody response in VBTs.
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21
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Raulino R, Thaurignac G, Butel C, Villabona-Arenas CJ, Foe T, Loul S, Ndimbo-Kumugo SP, Mbala-Kingebeni P, Makiala-Mandanda S, Ahuka-Mundeke S, Kerkhof K, Delaporte E, Ariën KK, Foulongne V, Mpoudi Ngole E, Peeters M, Ayouba A. Multiplex detection of antibodies to Chikungunya, O'nyong-nyong, Zika, Dengue, West Nile and Usutu viruses in diverse non-human primate species from Cameroon and the Democratic Republic of Congo. PLoS Negl Trop Dis 2021; 15:e0009028. [PMID: 33476338 PMCID: PMC7853492 DOI: 10.1371/journal.pntd.0009028] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 02/02/2021] [Accepted: 12/01/2020] [Indexed: 11/18/2022] Open
Abstract
Background Epidemic arbovirus transmission occurs among humans by mosquito bites and the sylvatic transmission cycles involving non-human primates (NHPs) still exists. However, limited data are available on the extent in NHPs infections and their role. In this study, we have developed and validated a high-throughput serological screening tool to study the circulation of multiple arboviruses that represent a significant threat to human health, in NHPs in Central Africa. Methodology/Principal findings Recombinant proteins NS1, envelope domain-3 (DIII) for the dengue (DENV), yellow fever (YFV), usutu (USUV), west nile (WNV) and zika (ZIKV) and envelope 2 for the chikungunya (CHIKV) and o'nyong-nyong (ONNV) were coupled to Luminex beads to detect IgG directed against these viruses. Evaluation of test performance was made using 161 human sera of known arboviral status (66 negative and 95 positive). The sensitivity and specificity of each antigen were determined by statistical methods and ROC curves (except for ONNV and USUV). All NS1 antigens (except NS1-YFV), CHIKV-E2 and WNV-DIII had sensitivities and specificities > 95%. For the other DIII antigens, the sensitivity was low, limiting the interest of their use for seroprevalence studies. Few simultaneous reactions were observed between the CHIKV+ samples and the NS1 antigens to the non-CHIKV arboviruses. On the other hand, the DENV+ samples crossed-reacted with NS1 of all the DENV serotypes (1 to 4), as well as with ZIKV, USUV and to a lesser extent with YFV. A total of 3,518 samples of 29 species of NHPs from Cameroon and the Democratic Republic of Congo (DRC) were tested against NS1 (except YFV), E2 (CHIKV/ONNV) and DIII (WNV) antigens. In monkeys (n = 2,100), the global prevalence varied between 2 and 5% for the ten antigens tested. When we stratified by monkey’s biotope, the arboreal species showed the highest reactivity. In monkeys from Cameroon, the highest IgG prevalence were observed against ONNV-E2 and DENV2-NS1 with 3.95% and 3.40% respectively and in DRC, ONNV-E2 (6.63%) and WNV-NS1 (4.42%). Overall prevalence was low in apes (n = 1,418): ranging from 0% for USUV-NS1 to 2.6% for CHIKV-E2. However, a very large disparity was observed among collection site and ape species, e.g. 18% (9/40) and 8.2% (4/49) of gorillas were reactive with CHIKV-E2 or WNV-NS1, respectively in two different sites in Cameroon. Conclusions/Significance We have developed a serological assay based on Luminex technology, with high specificity and sensitivity for simultaneous detection of antibodies to 10 antigens from 6 different arboviruses. This is the first study that evaluated on a large scale the presence of antibodies to arboviruses in NHPs to evaluate their role in sylvatic cycles. The overall low prevalence (<5%) in more than 3,500 NHPs samples from Cameroon and the DRC does not allow us to affirm that NHP are reservoirs, but rather, intermediate hosts of these viruses. In the last decades, chikungunya, zika, yellow fever, usutu and dengue viruses have (re)-emerged in different parts of the world and many of these outbreaks occur in resource-limited countries with limited or under-equipped health facilities and where endemic malaria with very similar clinical symptoms confounds surveillance. Most arboviruses that circulate today likely originated in Africa where sporadic human outbreaks occur. In this work, we developed a serological tool that allows simultaneous detection of IgG antibodies to multiple arbovirus in a biological sample. With this highly sensitive and specific multiplex assay, we screened more than 3,500 samples collected from 29 species of monkeys and apes in Africa. We found a global IgG antibody prevalence of less than 5%. However, this seroprevalence varied by collection site, NPHs species and virus type. Given these findings, we concluded that African non-human primates are most likely not the reservoirs, but rather are intermediate hosts.
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Affiliation(s)
- Raisa Raulino
- Recherches Translationnelles sur le VIH et Maladies Infectieuses/INSERM U1175, Institut de Recherche pour le Développement et Université de Montpellier, France
| | - Guillaume Thaurignac
- Recherches Translationnelles sur le VIH et Maladies Infectieuses/INSERM U1175, Institut de Recherche pour le Développement et Université de Montpellier, France
| | - Christelle Butel
- Recherches Translationnelles sur le VIH et Maladies Infectieuses/INSERM U1175, Institut de Recherche pour le Développement et Université de Montpellier, France
| | - Christian Julian Villabona-Arenas
- Recherches Translationnelles sur le VIH et Maladies Infectieuses/INSERM U1175, Institut de Recherche pour le Développement et Université de Montpellier, France
| | - Thomas Foe
- Recherches Translationnelles sur le VIH et Maladies Infectieuses/INSERM U1175, Institut de Recherche pour le Développement et Université de Montpellier, France
| | - Severin Loul
- Centre de Recherches sur les Maladies Émergentes, Ré-émergentes et la Médecine Nucléaire, Institut de Recherches Médicales et D'études des Plantes Médicinales, Yaoundé, Cameroun
| | | | | | | | - Steve Ahuka-Mundeke
- Institut National de Recherche Biomédicales, Kinshasa, République Démocratique du Congo
| | - Karen Kerkhof
- Department of Biomedical Sciences, Virology Unit, Institute of Tropical Medicine, Antwerp, Belgium
| | - Eric Delaporte
- Recherches Translationnelles sur le VIH et Maladies Infectieuses/INSERM U1175, Institut de Recherche pour le Développement et Université de Montpellier, France
| | - Kevin K. Ariën
- Department of Biomedical Sciences, Virology Unit, Institute of Tropical Medicine, Antwerp, Belgium
- Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium
| | - Vincent Foulongne
- Département de bactériologie-virologie, CHU de Montpellier, Montpellier, France
| | - Eitel Mpoudi Ngole
- Centre de Recherches sur les Maladies Émergentes, Ré-émergentes et la Médecine Nucléaire, Institut de Recherches Médicales et D'études des Plantes Médicinales, Yaoundé, Cameroun
| | - Martine Peeters
- Recherches Translationnelles sur le VIH et Maladies Infectieuses/INSERM U1175, Institut de Recherche pour le Développement et Université de Montpellier, France
| | - Ahidjo Ayouba
- Recherches Translationnelles sur le VIH et Maladies Infectieuses/INSERM U1175, Institut de Recherche pour le Développement et Université de Montpellier, France
- * E-mail:
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Kubinski M, Beicht J, Gerlach T, Volz A, Sutter G, Rimmelzwaan GF. Tick-Borne Encephalitis Virus: A Quest for Better Vaccines against a Virus on the Rise. Vaccines (Basel) 2020; 8:E451. [PMID: 32806696 PMCID: PMC7564546 DOI: 10.3390/vaccines8030451] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 08/06/2020] [Accepted: 08/10/2020] [Indexed: 12/15/2022] Open
Abstract
Tick-borne encephalitis virus (TBEV), a member of the family Flaviviridae, is one of the most important tick-transmitted viruses in Europe and Asia. Being a neurotropic virus, TBEV causes infection of the central nervous system, leading to various (permanent) neurological disorders summarized as tick-borne encephalitis (TBE). The incidence of TBE cases has increased due to the expansion of TBEV and its vectors. Since antiviral treatment is lacking, vaccination against TBEV is the most important protective measure. However, vaccination coverage is relatively low and immunogenicity of the currently available vaccines is limited, which may account for the vaccine failures that are observed. Understanding the TBEV-specific correlates of protection is of pivotal importance for developing novel and improved TBEV vaccines. For affording robust protection against infection and development of TBE, vaccines should induce both humoral and cellular immunity. In this review, the adaptive immunity induced upon TBEV infection and vaccination as well as novel approaches to produce improved TBEV vaccines are discussed.
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Affiliation(s)
- Mareike Kubinski
- Research Center for Emerging Infections and Zoonoses (RIZ), University of Veterinary Medicine Hannover, Foundation (TiHo), Buenteweg 17, 30559 Hannover, Germany; (M.K.); (J.B.); (T.G.)
| | - Jana Beicht
- Research Center for Emerging Infections and Zoonoses (RIZ), University of Veterinary Medicine Hannover, Foundation (TiHo), Buenteweg 17, 30559 Hannover, Germany; (M.K.); (J.B.); (T.G.)
| | - Thomas Gerlach
- Research Center for Emerging Infections and Zoonoses (RIZ), University of Veterinary Medicine Hannover, Foundation (TiHo), Buenteweg 17, 30559 Hannover, Germany; (M.K.); (J.B.); (T.G.)
| | - Asisa Volz
- Institute of Virology, University of Veterinary Medicine Hannover, Foundation (TiHo), Buenteweg 17, 30559 Hannover, Germany;
| | - Gerd Sutter
- Institute for Infectious Diseases and Zoonoses, Ludwig-Maximilians-University (LMU) Munich, Veterinaerstr. 13, 80539 Munich, Germany;
| | - Guus F. Rimmelzwaan
- Research Center for Emerging Infections and Zoonoses (RIZ), University of Veterinary Medicine Hannover, Foundation (TiHo), Buenteweg 17, 30559 Hannover, Germany; (M.K.); (J.B.); (T.G.)
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Prevalence of locally undetected acute infections of Flaviviruses in North-Eastern Nigeria. Virus Res 2020; 286:198060. [PMID: 32561377 DOI: 10.1016/j.virusres.2020.198060] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 06/02/2020] [Accepted: 06/10/2020] [Indexed: 02/02/2023]
Abstract
The burden of Arboviral infections is largely underestimated in Africa, particularly in North-Eastern Nigeria. A total of 200 serum samples were collected from patients exhibiting febrile illness who visited the State Specialist Hospital in Maiduguri for medical attention between March and April 2018. Sera were tested for Flavivirus RNA by a pan-flaviviral primer set using hemi-nested RT PCR. Twenty-six samples were positive for flaviviral RNA and sequence analysis indicated a high number of West Nile virus infections and one case of Zika virus. In-house recombinant NS1-based IgM ELISA indicated 47 % of WNV and 22 % of ZIKV infections. These data were also compared to commercially available assays for West Nile and Zika viruses. Finally, NS1 IgG ELISA was conducted for Dengue, Zika, West Nile and Usutu viruses. For serum samples detected by at least one flavivirus, 945% tested positive by NS1 IgG antibodies, while only 5.5 % of the patients were negative for all. To conclude, there is a high prevalence rate of arbovirus infections in the region, including Zika and Usutu viruses that were not previously detected. Interestingly, the analysis was conducted using in-house tools to allow the implementation of a sustainable surveillance protocol locally.
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24
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Caracciolo I, Mora-Cardenas E, Aloise C, Carletti T, Segat L, Burali MS, Chiarvesio A, Totis V, Avšič–Županc T, Mastrangelo E, Manfroni G, D’Agaro P, Marcello A. Comprehensive response to Usutu virus following first isolation in blood donors in the Friuli Venezia Giulia region of Italy: Development of recombinant NS1-based serology and sensitivity to antiviral drugs. PLoS Negl Trop Dis 2020; 14:e0008156. [PMID: 32226028 PMCID: PMC7145266 DOI: 10.1371/journal.pntd.0008156] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 04/09/2020] [Accepted: 02/19/2020] [Indexed: 01/25/2023] Open
Abstract
Surveillance of Usutu virus is crucial to prevent future outbreaks both in Europe and in other countries currently naïve to the infection, such as the Americas. This goal remains difficult to achieve, notably because of the lack of large-scale cohort studies and the absence of commercially available diagnostic reagents for USUV. This work started with the first identification of USUV in a blood donor in the Friuli Venezia Giulia (FVG) Region in Northern-Eastern Italy, which is endemic for West Nile virus. Considering that only one IgG ELISA is commercially available, but none for IgM, a novel NS1 antigen based IgG/M ELISA has been developed. This assay tested successfully for the detection of Usutu virus in blood donors with the identification of a second case of transmission and high levels of exposure. Furthermore, two pan-flavivirus antiviral drugs, that we previously characterized to be inhibitors of other flavivirus infectivity, were successfully tested for inhibition of Usutu virus with inhibitory concentrations in the low micromolar range. To conclude, this work identifies North-Eastern Italy as endemic for Usutu virus with implications for the screening of transfusion blood. A novel NS1-based ELISA test has been implemented for the detection of IgM/G that will be of importance as a tool for the diagnosis and surveillance of Usutu virus infection. Finally, Usutu virus is shown to be sensitive to a class of promising pan-flavivirus drugs. Tropical viruses transmitted by ticks or mosquitoes are becoming a health threat in areas of the world that were previously naïve to these infections. Usutu virus is a mosquito-borne virus that is circulating in Europe causing massive outbreaks in birds. Transmission to humans is documented, with some reports of severe neurological disease. However, the real size of transmission to humans suffers from lack of data due to insufficient surveillance. The first confirmed case of human USUV infection in an asymptomatic blood donor from North-Eastern Italy is hereby demonstrated by molecular assays and virus isolation. Specific Usutu virus serology has also been developed taking advantage of the NS1 viral antigen, which is tested on a number of blood donors demonstrating a high level of Usutu positivity. These findings confirm the human transmission in the region and offer a novel tool for specific Usutu virus surveillance. Finally, two drugs that were previously shown to have a wide spectrum of activity towards members of this family of viruses are shown to inhibit also Usutu virus, opening the way to a novel class antivirals.
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Affiliation(s)
- Ilaria Caracciolo
- Regional Reference Centre for Arbovirus Infections, Department of Medical, Surgical and Health Sciences, University of Trieste, Trieste, Italy
| | - Erick Mora-Cardenas
- Laboratory of Molecular Virology, International Centre for Genetic Engineering and Biotechnology (ICGEB), Padriciano, Trieste, Italy
| | - Chiara Aloise
- Laboratory of Molecular Virology, International Centre for Genetic Engineering and Biotechnology (ICGEB), Padriciano, Trieste, Italy
| | - Tea Carletti
- Laboratory of Molecular Virology, International Centre for Genetic Engineering and Biotechnology (ICGEB), Padriciano, Trieste, Italy
| | - Ludovica Segat
- Regional Reference Centre for Arbovirus Infections, Department of Medical, Surgical and Health Sciences, University of Trieste, Trieste, Italy
- Azienda Sanitaria Universitaria Integrata di Trieste, UCO Igiene e Sanità Pubblica, Trieste, Italy
| | - Maria Sole Burali
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Perugia, Perugia, Italy
| | - Alexsia Chiarvesio
- Centro Unico Regionale Produzione Emocomponenti C.U.R.P.E. P.O. Palmanova A.A.S.2 Bassa Friulana Isontina, Palmanova, Italy
| | - Vivianna Totis
- Centro Unico Regionale Produzione Emocomponenti C.U.R.P.E. P.O. Palmanova A.A.S.2 Bassa Friulana Isontina, Palmanova, Italy
| | - Tatjana Avšič–Županc
- Laboratory of Diagnostics of Zoonoses and WHO Centre, Institute of Microbiology and Immunology, University of Ljubljana, Ljubljana, Slovenia
| | | | - Giuseppe Manfroni
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Perugia, Perugia, Italy
| | - Pierlanfranco D’Agaro
- Regional Reference Centre for Arbovirus Infections, Department of Medical, Surgical and Health Sciences, University of Trieste, Trieste, Italy
- Azienda Sanitaria Universitaria Integrata di Trieste, UCO Igiene e Sanità Pubblica, Trieste, Italy
- * E-mail: (PD); (AM)
| | - Alessandro Marcello
- Laboratory of Molecular Virology, International Centre for Genetic Engineering and Biotechnology (ICGEB), Padriciano, Trieste, Italy
- * E-mail: (PD); (AM)
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