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Poggianella M, Bernedo R, Oloketuyi S, de Marco A. Nanobodies Selectively Binding to the Idiotype of a Dengue Virus Neutralizing Antibody Do Not Necessarily Mimic the Viral Epitope. Biomolecules 2023; 13:biom13030551. [PMID: 36979486 PMCID: PMC10046864 DOI: 10.3390/biom13030551] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 03/01/2023] [Accepted: 03/16/2023] [Indexed: 03/30/2023] Open
Abstract
Vaccination against dengue virus is challenged by the fact that a generic immune response can induce antibody-dependent-enhancement (ADE) in secondary infections. Only some antibodies targeting a quaternary epitope formed by the dimerization of the virus protein E possess sufficient neutralizing capacity. Therefore, the immunization with anti-idiotypic antibodies of neutralizing antibodies might represent a safe vaccination strategy. Starting from a large pre-immune library, we succeeded in isolating a wide set of anti-idiotypic nanobodies characterized by selective and strong binding to the paratope of the neutralizing antibody 1C10. However, the mice immunized with such constructs did not produce effective antibodies, despite at least some of them eliciting an immune response selective for the nanobody variable regions. The results suggest that complex conformational epitopes might be difficult to be recreated by anti-idiotypic structures. The selection process of the anti-idiotypic candidates might be optimized by applying epitope mapping and modeling approaches aimed at identifying the key residues that is necessary to bind to trigger selective immune response.
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Affiliation(s)
- Monica Poggianella
- Molecular Immunology Laboratory, International Centre for Genetic Engineering and Biotechnolgy, Padriciano 99, 34149 Trieste, Italy
| | - Robert Bernedo
- Laboratory for Environmental and Life Sciences, University of Nova Gorica, 5000 Nova Gorica, Slovenia
| | - Sandra Oloketuyi
- Laboratory for Environmental and Life Sciences, University of Nova Gorica, 5000 Nova Gorica, Slovenia
| | - Ario de Marco
- Laboratory for Environmental and Life Sciences, University of Nova Gorica, 5000 Nova Gorica, Slovenia
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Quantitative and Selective Surface Plasmon Resonance Response Based on a Reduced Graphene Oxide-Polyamidoamine Nanocomposite for Detection of Dengue Virus E-Proteins. NANOMATERIALS 2020; 10:nano10030569. [PMID: 32245185 PMCID: PMC7153703 DOI: 10.3390/nano10030569] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Revised: 01/31/2020] [Accepted: 02/11/2020] [Indexed: 12/12/2022]
Abstract
Dengue viral infection is one of the most common deadliest diseases and has become a recurrent issue for public health in tropical countries. Although the spectrum of clinical diagnosis and treatment have recently been established, the efficient and rapid detection of dengue virus (DENV) during viremia and the early febrile phase is still a great challenge. In this study, a dithiobis (succinimidyl undecanoate, DSU)/amine-functionalized reduced graphene oxide--polyamidoamine dendrimer (DSU/amine-functionalized rGO-PAMAM) thin film-based surface plasmon resonance (SPR) sensor was developed for the detection of DENV 2 E-proteins. Different concentrations of DENV 2 E-proteins were successfully tested by the developed SPR sensor-based system. The performance of the developed sensor showed increased shift in the SPR angle, narrow full-width-half-maximum of the SPR curve, high detection accuracy, excellent figure of merit and signal-to-noise ratio, good sensitivity values in the range of 0.08-0.5 pM (S = 0.2576°/pM, R2 = 0.92), and a high equilibrium association constant (KA) of 7.6452 TM-1. The developed sensor also showed a sensitive and selective response towards DENV 2 E-proteins compared to DENV 1 E-proteins and ZIKV (Zika virus) E-proteins. Overall, it was concluded that the Au/DSU/amine-functionalized rGO-PAMAM thin film-based SPR sensor has potential to serve as a rapid clinical diagnostic tool for DENV infection.
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Agustiningrum I, Nugraha J, Kahar H. MCP-1 LEVELS AND ATYPICAL LYMPHOCYTES IN EARLY FEVER OF DENGUE VIRUS INFECTION WITH NON-STRUCTURAL PROTEIN 1 (NS-1) ANTIGEN TEST IN dr DARSONO HOSPITAL, PACITAN. INDONESIAN JOURNAL OF TROPICAL AND INFECTIOUS DISEASE 2020. [DOI: 10.20473/ijtid.v8i1.12696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Dengue infection caused by DENV and transmitted by mosquitoes Aedes aegypti and Aedes albopictus is a major health problem in the world, including Indonesia. Clinical manifestations of dengue infection are very widely, from asymptomatic until dengue shock syndrome (DSS). DENV will attack macrophages and dendritic cells (DC) and replicate them. Monocytes are macrophages in the blood (±10% leukocytes). Macrophages produce cytokines and chemokines such as monocyte chemotactic protein-1 (MCP-1)/CCL2. The monocytes that are infected with DENV will express MCP-1, which will increase the permeability of vascular endothelial cells so that they have a risk of developing DHF/DSS. Macrophages and DC secrete NS1 proteins, which are the co-factors that are needed for viral replication and can be detected in the early phase of fever. The increased MCP-1 levels in dengue infection followed by an increase in the number of atypical lymphocytes indicate the arrival of macrophages and monocytes to the site of inflammation which triggers proliferation rather than lymphocytes. This is an observational analytical study with a cross-sectional design to determine the MCP-1 level in dengue infection patients with 1st until the 4th day of fever and the presence of atypical lymphocytes. Dengue infection was determined by rapid tests NS1 positive or negative and MCP-1 levels were measured using by ELISA sandwich method.MCP-1 level of sixty patients dengue infection NS-1 rapid positive or negative with 2nd until 4rt fever were significantly higher than healthy subjects (420.263±158,496vs29, 475±23.443;p=0.000), but there was no significant difference in subjects with DF, DHF or DSS (436,47±225,59 vs422,77±170,55vs 448,50±117,39; p =0.844). Atypicallymphosite differs significantly in healthy subjects than subjects infected with DENV an average of 2% (p= 0,000). In conclusion, this shows the arrival of macrophages and monocytes to the site of inflammation, which triggers the proliferation of lymphocytes.
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Foley DA, Yeoh DK, Karapanagiotidis T, Nhindri T, Catton M. Fever in the returned traveller: the utility of the Platelia Dengue NS1 antigen enzyme immunoassay for the diagnosis of dengue in a non-endemic setting. Pathology 2020; 52:370-372. [PMID: 32107080 DOI: 10.1016/j.pathol.2020.01.438] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 01/19/2020] [Accepted: 01/23/2020] [Indexed: 11/29/2022]
Abstract
Investigating fever in the returned traveller can be difficult and costly. Dengue is one of the most frequently reported aetiologies. NS1 is a non-structural dengue virus protein detectable during acute infection. The aim of this report is to describe the utility of the Platelia Dengue NS1 antigen enzyme immunoassay (EIA) for detection of dengue in a non-endemic region compared to a composite gold standard of contemporaneous molecular testing and seroconversion. We performed a retrospective analysis of all dengue serology tests from 6 February 2012 to 5 December 2018. Dengue serology and in-house flavivirus molecular results were identified using the laboratory information management system. Dengue serology was performed using the Bio-Rad Platelia Dengue NS1 antigen EIA, and Abbott Panbio Dengue IgG and IgM EIA. True positive NS1 result was defined as positive molecular test within one week of the positive NS1 result or seroconversion within 120 days. NS1 negative samples that remained negative to all dengue markers on repeat more than 10 and up to 120 days after were labelled as true negatives. More than 75% of cases had a serology pattern consistent with primary dengue. Sensitivity and specificity of NS1 Ag EIA was 96.4% (95% CI 92.3-98.7%) and 98.4% (95% CI 94.5-99.8%), respectively. Performance was poorer in serotype 4 infections (sensitivity 50%). Platelia Dengue NS1 antigen EIA test performance in the returned traveller cohort fulfils the remit as a single diagnostic test for acute dengue infection.
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Affiliation(s)
- David A Foley
- Victorian Infectious Diseases Reference Laboratory, Parkville, Vic, Australia; Department of Infectious Diseases, Perth Children's Hospital, Nedlands, WA, Australia.
| | - Daniel K Yeoh
- Department of Infectious Diseases, Perth Children's Hospital, Nedlands, WA, Australia
| | | | - Tinashe Nhindri
- Victorian Infectious Diseases Reference Laboratory, Parkville, Vic, Australia
| | - Mike Catton
- Victorian Infectious Diseases Reference Laboratory, Parkville, Vic, Australia
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Zhou Q, Bi Z, Yin D, Gu X, Xu Z, Huang R, Xing X, Qi K, Wang G. Development and application of an indirect ELISA for the serological detection of duck Tembusu virus infection based on the NS1 protein antigen. Arch Virol 2019; 165:709-714. [PMID: 31873767 DOI: 10.1007/s00705-019-04495-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Accepted: 11/06/2019] [Indexed: 02/01/2023]
Abstract
Duck Tembusu virus (DTMUV) has caused significant economic losses in China since 2010. However, there is still a lack of effective methods to diagnose the disease caused by this virus, and especially to differentiate infection from vaccination. In this study, we established a novel indirect enzyme-linked immunosorbent assay (iELISA) and performed a retrospective serological survey for DTMUV in Anhui province, China. Our results show that the iELISA displayed high specificity sensitivity, and with no serological cross-reaction with other duck pathogens. These findings indicate that the newly developed iELISA could be a useful screening tool for large-scale monitoring of the epidemiology of DTMUV infection in ducks.
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Affiliation(s)
- Qi Zhou
- College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China
| | - Zhuangli Bi
- College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China.,Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai, 200241, China
| | - Dongdong Yin
- College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China.,Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, Hefei, 230036, China
| | - Xiangxue Gu
- College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China
| | - Zejun Xu
- College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China
| | - Rong Huang
- College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China
| | - Xue Xing
- College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China
| | - Kezong Qi
- Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, Hefei, 230036, China.
| | - Guijun Wang
- College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China. .,Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, Hefei, 230036, China.
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Lima MDRQ, Chouin-Carneiro T, Azeredo E, Barbosa LS, Souza TMA, Silva JBCD, Nunes PCG, Dal Fabbro M, Facco IHR, Venâncio-da-Cunha R, Dos Santos FB. The inability of a dengue NS1 ELISA to detect Zika infections. Sci Rep 2019; 9:18596. [PMID: 31819129 PMCID: PMC6901494 DOI: 10.1038/s41598-019-55160-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Accepted: 11/25/2019] [Indexed: 12/27/2022] Open
Abstract
The presence of dengue virus (DENV), Zika virus (ZIKV) and Chikungunya virus (CHIKV) in Brazil, may result in a difficult diagnosis due to the signs and symptoms shared by those. Moreover, as DENV and ZIKV belong to the same family, serological assays may show a high rate of cross-reactivity. Here, we evaluated a Dengue NS1 capture assay for early and differential diagnosis of dengue during the Zika epidemic occurred in Brazil in 2016. Samples (n = 227) from 218 patients included sera, plasma and urine from previously confirmed acute cases of Zika, dengue and Zika/dengue co-infections. Nine of those patients presented two specimens. The Dengue NS1 test was very specific for dengue diagnosis (99.32%), even in the co-circulation with ZIKV, and exhibited a high accuracy in not detecting acute Zika infections (92.43%). Our findings showed that the dengue NS1 capture test analyzed here was not able to recognize the ZIKV NS1 and its potential for cross-reaction.
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Affiliation(s)
| | - Thais Chouin-Carneiro
- Viral Immunology Laboratory, Oswaldo Cruz Institute, Rio de Janeiro, 21045-360, Brazil
| | - Elzinandes Azeredo
- Viral Immunology Laboratory, Oswaldo Cruz Institute, Rio de Janeiro, 21045-360, Brazil
| | | | | | | | | | - Márcia Dal Fabbro
- Medical Clinic Department, Federal University of Mato Grosso do Sul, Campo Grande, 79070-900, Brazil
| | | | - Rivaldo Venâncio-da-Cunha
- Medical Clinic Department, Federal University of Mato Grosso do Sul, Campo Grande, 79070-900, Brazil
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Zhang T, Wang ML, Zhang GR, Liu W, Xiao XQ, Yang YS, Li JT, Xun ZM, Li DY, Chan PK. Recombinant DENV 2 NS5: An effective antigen for diagnosis of DENV infection. J Virol Methods 2019; 265:35-41. [DOI: 10.1016/j.jviromet.2018.12.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Revised: 12/13/2018] [Accepted: 12/15/2018] [Indexed: 12/12/2022]
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Zhong Y, Tang X, Sheng X, Xing J, Zhan W. Development and Characterization of Monoclonal Antibodies to the 32 kDa Viral Attachment Protein of Lymphocystis Disease Virus and Their Neutralizing Ability in Vitro. Int J Mol Sci 2018; 19:ijms19092536. [PMID: 30150566 PMCID: PMC6165272 DOI: 10.3390/ijms19092536] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Revised: 08/22/2018] [Accepted: 08/25/2018] [Indexed: 11/16/2022] Open
Abstract
In previous research, a 32 kDa protein in lymphocystis disease virus (LCDV) was identified as viral attachment protein (VAP) that specifically interacted with the 27.8 kDa cellular receptor from flounder Paralichthys olivaceus gill (FG) cells, and the recombinant VAP (rVAP) was expressed in Escherichia coli strain BL21 (DE3). In this study, monoclonal antibodies (MAbs) against 32 kDa VAP are produced by immunization of BALB/c mice with the rVAP. Seven hybridoma secreting MAbs were screened by enzyme-linked immunosorbent assay, five of which designated as 1C6, 1C8, 3B5, 3D11 and 3H10 are cloned by the limiting dilution method, depending on the strongly positive results of ELISA. Western blotting analysis shows that the five MAbs can specifically react with the 32 kDa protein of LCDV and the purified 50 kDa rVAP, and the subtype of the MAbs is identified as IgG. Immunofluorescence results demonstrate that the specific fluorescence signals for LCDV appear in the cytoplasm of FG cells at 24 h post LCDV infection. Neutralization assay results indicate that pre-incubations of LCDV with the five MAbs can significantly decrease the LCDV copy numbers and delay the development of the cytopathic effect in FG cells, revealing that the five MAbs can neutralize the LCDV particles and block viral infection in vitro. The neutralizing MAbs against 32 kDa VAP would be useful for the study on the LCDV⁻host interaction and might be promising inhibitors of LCDV infection in fish.
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Affiliation(s)
- Ying Zhong
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, Qingdao 266003, China.
| | - Xiaoqian Tang
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, Qingdao 266003, China.
| | - Xiuzhen Sheng
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, Qingdao 266003, China.
| | - Jing Xing
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, Qingdao 266003, China.
| | - Wenbin Zhan
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, Qingdao 266003, China.
- Function Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China.
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