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Fisher R, Lustig Y, Sklan EH, Schwartz E. The Role of NS1 Protein in the Diagnosis of Flavivirus Infections. Viruses 2023; 15:v15020572. [PMID: 36851784 PMCID: PMC9963814 DOI: 10.3390/v15020572] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 02/12/2023] [Accepted: 02/17/2023] [Indexed: 02/22/2023] Open
Abstract
Nonstructural protein 1 (NS1) is a glycoprotein among the flavivirus genus. It is found in both membrane-associated and soluble secreted forms, has an essential role in viral replication, and modulates the host immune response. NS1 is secreted from infected cells within hours after viral infection, and thus immunodetection of NS1 can be used for early serum diagnosis of dengue fever infections instead of real-time (RT)-PCR. This method is fast, simple, and affordable, and its availability could provide an easy point-of-care testing solution for developing countries. Early studies show that detecting NS1 in cerebrospinal fluid (CSF) samples is possible and can improve the surveillance of patients with dengue-associated neurological diseases. NS1 can be detected postmortem in tissue specimens. It can also be identified using noninvasive methods in urine, saliva, and dried blood spots, extending the availability and effective detection period. Recently, an enzyme-linked immunosorbent assay (ELISA) assay for detecting antibodies directed against Zika virus NS1 has been developed and used for diagnosing Zika infection. This NS1-based assay was significantly more specific than envelope protein-based assays, suggesting that similar assays might be more specific for other flaviviruses as well. This review summarizes the knowledge on flaviviruses' NS1's potential role in antigen and antibody diagnosis.
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Affiliation(s)
- Ron Fisher
- Department of Otolaryngology/Head & Neck Surgery, Hadassah Hebrew; University Medical Center, Jerusalem 91120, Israel
| | - Yaniv Lustig
- Central Virology Laboratory, Ministry of Health, Sheba Medical Center, Ramat-Gan 52621, Israel
- Sackler Faculty of Medicine, Tel-Aviv University, Tel Aviv 69978, Israel
| | - Ella H. Sklan
- Sackler Faculty of Medicine, Tel-Aviv University, Tel Aviv 69978, Israel
| | - Eli Schwartz
- Sackler Faculty of Medicine, Tel-Aviv University, Tel Aviv 69978, Israel
- The Center of Geographic Medicine and Tropical Diseases, Sheba Medical Center, Ramat-Gan 52621, Israel
- Correspondence:
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Agarwal A, Gupta S, Chincholkar T, Singh V, Umare IK, Ansari K, Paliya S, Yadav AK, Chowdhary R, Purwar S, Biswas D. Co-circulation of dengue virus serotypes in Central India: Evidence of prolonged viremia in DENV-2. INFECTION GENETICS AND EVOLUTION 2019; 70:72-79. [DOI: 10.1016/j.meegid.2019.02.024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Revised: 02/15/2019] [Accepted: 02/20/2019] [Indexed: 01/01/2023]
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Ahamed SF, Rosario V, Britto C, Dias M, Nayak K, Chandele A, Kaja MK, Shet A. Emergence of new genotypes and lineages of dengue viruses during the 2012-15 epidemics in southern India. Int J Infect Dis 2019; 84S:S34-S43. [PMID: 30639622 DOI: 10.1016/j.ijid.2019.01.014] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2018] [Revised: 01/06/2019] [Accepted: 01/07/2019] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVES To genotypically characterize dengue virus (DENV) isolates among dengue-infected children from 2012-13/2014-15 outbreaks in southern India. METHODS Children hospitalized with suspected dengue were tested for dengue RT-PCR targeting Capsid-preMembrane (C-prM) and Envelope (Env) regions. Following virologic confirmation (n=612), a representative selection of DENV isolates (n=99) were sequenced for C-prM, aligned using ClustalW and subjected to phylogenetic analysis by maximum-likelihood method in MEGA6. RESULTS In 2012-13 (n=113), DENV-3 (44, 38.9%) and DENV-2 (43, 38.1%) predominated; DENV-1 (22, 19.5%) and DENV-4 (1, 0.9%) were less common. The pattern changed in 2014-15 (n=499), when DENV-1 (329, 65.7%) predominated, followed by DENV-2 (97, 21.2%), DENV-3 (36, 6.7%) and DENV-4 (10, 2.0%). Multiple-serotype co-infections occurred in 2.7% and 5.4% in 2012-13 and 2014-15, respectively. Genotype III (GIII) of DENV-1 predominated (85.7%) in 2012-13, ceding to GI predominance (80.8%) in 2014-15. Among DENV-2, 71.9% (23/32) showed distinct clustering suggesting a new lineage, 'GIVc'. All tested DENV-4 were GIC, whose clustering pattern showed the emergence of two distinct clades. CONCLUSIONS New genotypic/lineage variations in DENV-1 and DENV-2 may have influenced the magnitude and severity of dengue epidemics in southern India during this period. These findings emphasize the role of active surveillance of DENV serotypes/genotypes in aiding outbreak control and vaccine studies.
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Affiliation(s)
- Syed Fazil Ahamed
- Division of Infectious Diseases, St. John's Research Institute, St. John's National Academy of Health Sciences, Bangalore, 560034, Karnataka, India; The University of Trans-Disciplinary Health Sciences & Technology (TDU), Bangalore, 560064, Karnataka, India.
| | - Vivek Rosario
- Division of Infectious Diseases, St. John's Research Institute, St. John's National Academy of Health Sciences, Bangalore, 560034, Karnataka, India.
| | - Carl Britto
- Oxford Vaccine Group, Department of Paediatrics, University of Oxford, UK.
| | - Mary Dias
- Division of Infectious Diseases, St. John's Research Institute, St. John's National Academy of Health Sciences, Bangalore, 560034, Karnataka, India; Department of Microbiology, St. John's Medical College Hospital, St. John's National Academy of Health Sciences, Bangalore, 560034, Karnataka, India.
| | - Kaustuv Nayak
- ICGEB-Emory Vaccine Centre, International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi, 110067, India.
| | - Anmol Chandele
- ICGEB-Emory Vaccine Centre, International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi, 110067, India.
| | - Murali-Krishna Kaja
- ICGEB-Emory Vaccine Centre, International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi, 110067, India; Department of Pediatrics, Emory University, 1760 Haygood Drive, Atlanta, GA, 30322, USA.
| | - Anita Shet
- International Vaccine Access Center, Johns Hopkins Bloomberg School of Public Health, 415 N Washington St, Baltimore 21231, USA.
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Kulkarni R, Tiraki D, Wani D, Mishra AC, Arankalle VA. Risk of transfusion-associated dengue: screening of blood donors from Pune, western India. Transfusion 2018; 59:458-462. [PMID: 30727040 DOI: 10.1111/trf.15007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 08/31/2018] [Accepted: 09/10/2018] [Indexed: 01/27/2023]
Abstract
BACKGROUND Dengue, a mosquito-borne viral disease, is endemic in >125 countries worldwide. The threat of blood-borne transmission of dengue virus (DENV) has been documented. STUDY DESIGN AND METHODS This study was conducted to assess the potential magnitude of transfusion-associated dengue, by determination of DENV seromarkers in blood donations from Pune, India, during two dengue seasons (2016 and 2017). These included DENV nonstructural protein 1 (NS1), anti-DENV immunoglobulin (Ig) M, anti-DENV IgG (enzyme-linked immunosorbent assay), and DENV RNA (reverse transcription-polymerase chain reaction). RESULTS NS1 (IgM) reactivity was 1 of 209, 0.48% (11/209, 5.3%) in 2016 and 2 of 311, 0.64% (20/311, 6.4%) in 2017. Of the 34 NS1/IgM reactives, 1 NS1-reactive donor and 10 IgM-reactive donors exhibited evidence of secondary infection. DENV RNA was not detected in any of the 34 NS1/IgM reactives. Among the NS1/IgM negatives, anti-DENV IgG reactivity was high in 2016 (75%) and further increased in 2017 (87%, p = 0.002). CONCLUSION Although RNA negative, detection of 34 NS1/IgM-reactive donations, of which 11 had evidence of secondary infection, suggests the need for further evaluation on the basis of potential risk to recipients of either dengue transmission or increased risk of secondary infection. These would include multicenter studies followed by cost-benefit analyses.
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Affiliation(s)
- Ruta Kulkarni
- Department of Communicable Diseases, Interactive Research School for Health Affairs, Bharati Vidyapeeth (Deemed To Be University), Pune, India
| | - Divya Tiraki
- Department of Communicable Diseases, Interactive Research School for Health Affairs, Bharati Vidyapeeth (Deemed To Be University), Pune, India
| | - Dileep Wani
- Department of Immunohaematology and Blood Transfusion, Bharati Medical College and Research Center, Bharati Vidyapeeth (Deemed To Be University), Pune, India
| | - Akhilesh C Mishra
- Department of Communicable Diseases, Interactive Research School for Health Affairs, Bharati Vidyapeeth (Deemed To Be University), Pune, India
| | - Vidya A Arankalle
- Department of Communicable Diseases, Interactive Research School for Health Affairs, Bharati Vidyapeeth (Deemed To Be University), Pune, India
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Santosh Kumar PS, M.C. A, Gupta SK, Nongkynrih B. Malaria, dengue and chikungunya in India – An update. INDIAN JOURNAL OF MEDICAL SPECIALITIES 2018. [DOI: 10.1016/j.injms.2017.12.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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