1
|
Keelapang P, Kraivong R, Pulmanausahakul R, Sriburi R, Prompetchara E, Kaewmaneephong J, Charoensri N, Pakchotanon P, Duangchinda T, Suparattanagool P, Luangaram P, Masrinoul P, Mongkolsapaya J, Screaton G, Ruxrungtham K, Auewarakul P, Yoksan S, Malasit P, Puttikhunt C, Ketloy C, Sittisombut N. Blockade-of-Binding Activities toward Envelope-Associated, Type-Specific Epitopes as a Correlative Marker for Dengue Virus-Neutralizing Antibody. Microbiol Spectr 2023; 11:e0091823. [PMID: 37409936 PMCID: PMC10433959 DOI: 10.1128/spectrum.00918-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Accepted: 06/20/2023] [Indexed: 07/07/2023] Open
Abstract
Humans infected with dengue virus (DENV) acquire long-term protection against the infecting serotype, whereas cross-protection against other serotypes is short-lived. Long-term protection induced by low levels of type-specific neutralizing antibodies can be assessed using the virus-neutralizing antibody test. However, this test is laborious and time-consuming. In this study, a blockade-of-binding enzyme-linked immunoassay was developed to assess antibody activity by using a set of neutralizing anti-E monoclonal antibodies and blood samples from dengue virus-infected or -immunized macaques. Diluted blood samples were incubated with plate-bound dengue virus particles before the addition of an enzyme-conjugated antibody specific to the epitope of interest. Based on blocking reference curves constructed using autologous purified antibodies, sample blocking activity was determined as the relative concentration of unconjugated antibody that resulted in the same percent signal reduction. In separate DENV-1-, -2-, -3-, and -4-related sets of samples, moderate to strong correlations of the blocking activity with neutralizing antibody titers were found with the four type-specific antibodies 1F4, 3H5, 8A1, and 5H2, respectively. Significant correlations were observed for single samples taken 1 month after infection as well as samples drawn before and at various time points after infection/immunization. Similar testing using a cross-reactive EDE-1 antibody revealed a moderate correlation between the blocking activity and the neutralizing antibody titer only for the DENV-2-related set. The potential usefulness of the blockade-of-binding activity as a correlative marker of neutralizing antibodies against dengue viruses needs to be validated in humans. IMPORTANCE This study describes a blockade-of-binding assay for the determination of antibodies that recognize a selected set of serotype-specific or group-reactive epitopes in the envelope of dengue virus. By employing blood samples collected from dengue virus-infected or -immunized macaques, moderate to strong correlations of the epitope-blocking activities with the virus-neutralizing antibody titers were observed with serotype-specific blocking activities for each of the four dengue serotypes. This simple, rapid, and less laborious method should be useful for the evaluation of antibody responses to dengue virus infection and may serve as, or be a component of, an in vitro correlate of protection against dengue in the future.
Collapse
Affiliation(s)
- Poonsook Keelapang
- Department of Microbiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
- Medical Biotechnology Research Unit, BIOTEC, NSTDA, Bangkok, Thailand
| | - Romchat Kraivong
- Medical Biotechnology Research Unit, BIOTEC, NSTDA, Bangkok, Thailand
- Molecular Biology of Dengue and Flaviviruses Research Team, Medical Molecular Biotechnology Research Group, National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Pathumthani, Thailand
- Division of Dengue Hemorrhagic Fever Research, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
- Siriraj Center of Research Excellence in Dengue and Emerging Pathogens, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | | | - Rungtawan Sriburi
- Department of Microbiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
- Medical Biotechnology Research Unit, BIOTEC, NSTDA, Bangkok, Thailand
| | - Eakachai Prompetchara
- Center of Excellence in Vaccine Research and Development (Chula-VRC), Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
- Department of Laboratory Medicine, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - Jutamart Kaewmaneephong
- Department of Microbiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
| | - Nicha Charoensri
- Center for Research and Development of Medical Diagnostic Laboratories, Faculty of Associated Medical Sciences, Khon Kaen University, Khon Kaen, Thailand
| | - Pattarakul Pakchotanon
- Medical Biotechnology Research Unit, BIOTEC, NSTDA, Bangkok, Thailand
- Molecular Biology of Dengue and Flaviviruses Research Team, Medical Molecular Biotechnology Research Group, National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Pathumthani, Thailand
| | - Thaneeya Duangchinda
- Medical Biotechnology Research Unit, BIOTEC, NSTDA, Bangkok, Thailand
- Molecular Biology of Dengue and Flaviviruses Research Team, Medical Molecular Biotechnology Research Group, National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Pathumthani, Thailand
- Division of Dengue Hemorrhagic Fever Research, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
- Siriraj Center of Research Excellence in Dengue and Emerging Pathogens, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | | | - Prasit Luangaram
- Medical Biotechnology Research Unit, BIOTEC, NSTDA, Bangkok, Thailand
- Molecular Biology of Dengue and Flaviviruses Research Team, Medical Molecular Biotechnology Research Group, National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Pathumthani, Thailand
| | - Promsin Masrinoul
- Center for Vaccine Development, Institute of Molecular Biosciences, Mahidol University at Salaya, Nakhon Pathom, Thailand
| | - Juthathip Mongkolsapaya
- Division of Dengue Hemorrhagic Fever Research, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
- Siriraj Center of Research Excellence in Dengue and Emerging Pathogens, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
- Wellcome Centre for Human Genetics, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
- Chinese Academy of Medical Science (CAMS), Oxford Institute (COI), University of Oxford, Oxford, United Kingdom
| | - Gavin Screaton
- Wellcome Centre for Human Genetics, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
- Chinese Academy of Medical Science (CAMS), Oxford Institute (COI), University of Oxford, Oxford, United Kingdom
| | - Kiat Ruxrungtham
- Center of Excellence in Vaccine Research and Development (Chula-VRC), Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - Prasert Auewarakul
- Department of Microbiology, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Sutee Yoksan
- Center for Vaccine Development, Institute of Molecular Biosciences, Mahidol University at Salaya, Nakhon Pathom, Thailand
| | - Prida Malasit
- Medical Biotechnology Research Unit, BIOTEC, NSTDA, Bangkok, Thailand
- Molecular Biology of Dengue and Flaviviruses Research Team, Medical Molecular Biotechnology Research Group, National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Pathumthani, Thailand
- Division of Dengue Hemorrhagic Fever Research, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
- Siriraj Center of Research Excellence in Dengue and Emerging Pathogens, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Chunya Puttikhunt
- Medical Biotechnology Research Unit, BIOTEC, NSTDA, Bangkok, Thailand
- Molecular Biology of Dengue and Flaviviruses Research Team, Medical Molecular Biotechnology Research Group, National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Pathumthani, Thailand
- Division of Dengue Hemorrhagic Fever Research, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
- Siriraj Center of Research Excellence in Dengue and Emerging Pathogens, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Chutitorn Ketloy
- Center of Excellence in Vaccine Research and Development (Chula-VRC), Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
- Department of Laboratory Medicine, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - Nopporn Sittisombut
- Department of Microbiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
- Medical Biotechnology Research Unit, BIOTEC, NSTDA, Bangkok, Thailand
| |
Collapse
|
2
|
Saipin K, Thaisomboonsuk B, Siridechadilok B, Chaitaveep N, Ramasoota P, Puttikhunt C, Sangiambut S, Jones A, Kraivong R, Sriburi R, Keelapang P, Sittisombut N, Junjhon J. A replication competent luciferase-secreting DENV2 reporter for sero-epidemiological surveillance of neutralizing and enhancing antibodies. J Virol Methods 2022; 308:114577. [PMID: 35843366 DOI: 10.1016/j.jviromet.2022.114577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Revised: 06/21/2022] [Accepted: 07/06/2022] [Indexed: 10/17/2022]
Abstract
Dengue virus (DENV) specific neutralizing and enhancing antibodies play crucial roles in dengue disease prevention and pathogenesis. DENV reporters are gaining popularity in the evaluation of these antibodies; their accessibility and acceptance may improve with more efficient production systems and indications of their antigenic equivalence to the wild-type virus. This study aimed to generate a replication competent luciferase-secreting DENV reporter (LucDENV2) and evaluate its feasibility in neutralizing and infection-enhancing antibody assays in comparison with wild-type DENV2, strain 16681, and a luciferase-secreting, single-round infectious DENV2 reporter (LucSIP). LucDENV2 replicated to similarly high levels as that of the parent 16681 virus in a commonly used mosquito cell line. LucDENV2 was neutralized in an antibody concentration-dependent manner by a monoclonal antibody specific to the flavivirus fusion loop and two antibodies specific to the E domain III, which closely resembled the neutralization patterns employing the LucSIP and wild-type DENV2. Parallel analysis of LucDENV2 and wild-type DENV2 revealed good agreement between the luciferase-based and focus-based neutralization and enhancement assays in a 96-well microplate format when employed against a set of clinical sera, suggesting comparable antigenic properties of LucDENV2 with those of the parent virus. The high-titer, replication competent, luciferase-secreting DENV reporter presented here should be a useful tool for fast and reliable quantitation of neutralizing and infection-enhancing antibodies in populations living in DENV-endemic areas.
Collapse
Affiliation(s)
- Krongkan Saipin
- Department of Microbiology, Faculty of Public Health, Mahidol University, Bangkok 10400, Thailand
| | - Butsaya Thaisomboonsuk
- Department of Virology, Armed Forces Research Institute of Medical Sciences (AFRIMS), Bangkok 10400, Thailand
| | - Bunpote Siridechadilok
- Frontier Biodesign and Bioengineering Research Team, National Center for Genetic Engineering and Biotechnology, Pathum-thani 12120, Thailand
| | - Nithinart Chaitaveep
- Royal Thai Army, Armed Forces Research Institute of Medical Sciences (AFRIMS), Bangkok 10400, Thailand
| | - Pongrama Ramasoota
- Center of Excellence for Antibody Research (CEAR), Department of Social and Environmental Medicine, Faculty of Tropical Medicine, Mahidol University, Bangkok 10400, Thailand
| | - Chunya Puttikhunt
- Molecular Biology of Dengue and Flaviviruses Research Team, Medical Molecular Biotechnology Research Group, National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency, Pathum-thani 12120, Thailand; Division of Dengue Hemorrhagic Fever Research and Siriraj Center of Research Excellence in Dengue and Emerging Pathogens, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand
| | - Sutha Sangiambut
- Molecular Biology of Dengue and Flaviviruses Research Team, Medical Molecular Biotechnology Research Group, National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency, Pathum-thani 12120, Thailand; Division of Dengue Hemorrhagic Fever Research and Siriraj Center of Research Excellence in Dengue and Emerging Pathogens, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand
| | - Anthony Jones
- Department of Virology, Armed Forces Research Institute of Medical Sciences (AFRIMS), Bangkok 10400, Thailand
| | - Romchat Kraivong
- Molecular Biology of Dengue and Flaviviruses Research Team, Medical Molecular Biotechnology Research Group, National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency, Pathum-thani 12120, Thailand; Division of Dengue Hemorrhagic Fever Research and Siriraj Center of Research Excellence in Dengue and Emerging Pathogens, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand
| | - Rungtawan Sriburi
- Department of Microbiology, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Poonsook Keelapang
- Department of Microbiology, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Nopporn Sittisombut
- Department of Microbiology, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Jiraphan Junjhon
- Department of Microbiology, Faculty of Public Health, Mahidol University, Bangkok 10400, Thailand.
| |
Collapse
|
3
|
Kraivong R, Traewachiwiphak S, Nilchan N, Tangthawornchaikul N, Pornmun N, Poraha R, Sriruksa K, Limpitikul W, Avirutnan P, Malasit P, Puttikhunt C. Cross-reactive antibodies targeting surface-exposed non-structural protein 1 (NS1) of dengue virus-infected cells recognize epitopes on the spaghetti loop of the β-ladder domain. PLoS One 2022; 17:e0266136. [PMID: 35617160 PMCID: PMC9135231 DOI: 10.1371/journal.pone.0266136] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Accepted: 03/14/2022] [Indexed: 11/30/2022] Open
Abstract
Non-structural protein 1 (NS1) is a glycoprotein component of dengue virus (DENV) that is essential for viral replication, infection and immune evasion. Immunization with NS1 has been shown to elicit antibody-mediated immune responses which protect mice against DENV infections. Here, we obtained peripheral blood mononuclear cells from human subjects with secondary dengue infections, which were used to construct a dengue immune phage library displaying single-chain variable fragments. Phage selective for DENV NS1 were obtained by biopanning. Twenty-one monoclonal antibodies (mAbs) against DENV NS1 were generated from the selected phage and characterized in detail. We found most anti-NS1 mAbs used IGHV1 heavy chain antibody genes. The mAbs were classified into strongly and weakly-reactive groups based on their binding to NS1 expressed in dengue virus 2 (DENV2)-infected cells. Antibody binding experiments with recombinant NS1 proteins revealed that the mAbs recognize conformational epitopes on the β-ladder domain (amino acid residues 178–273) of DENV NS1. Epitope mapping studies on alanine-substituted NS1 proteins identified distinct but overlapping epitopes. Protruding amino acids distributed around the spaghetti loop are required for the binding of the strongly-reactive mAbs, whereas the recognition residues of the weakly-reactive mAbs are likely to be located in inaccessible sites facing toward the cell membrane. This information could guide the design of an NS1 epitope-based vaccine that targets cross-reactive conserved epitopes on cell surface-associated DENV NS1.
Collapse
Affiliation(s)
- Romchat Kraivong
- Molecular Biology of Dengue and Flaviviruses Research Team, National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency, Pathum Thani, Thailand
- Medical Biotechnology Research Unit, National Center for Genetic Engineering and Biotechnology, Siriraj Hospital, Bangkok, Thailand
- Faculty of Medicine Siriraj Hospital, Siriraj Center of Research Excellence in Dengue and Emerging Pathogens, Mahidol University, Bangkok, Thailand
| | - Somchoke Traewachiwiphak
- Molecular Biology of Dengue and Flaviviruses Research Team, National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency, Pathum Thani, Thailand
| | - Napon Nilchan
- Molecular Biology of Dengue and Flaviviruses Research Team, National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency, Pathum Thani, Thailand
- Medical Biotechnology Research Unit, National Center for Genetic Engineering and Biotechnology, Siriraj Hospital, Bangkok, Thailand
- Faculty of Medicine Siriraj Hospital, Siriraj Center of Research Excellence in Dengue and Emerging Pathogens, Mahidol University, Bangkok, Thailand
| | - Nattaya Tangthawornchaikul
- Molecular Biology of Dengue and Flaviviruses Research Team, National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency, Pathum Thani, Thailand
- Medical Biotechnology Research Unit, National Center for Genetic Engineering and Biotechnology, Siriraj Hospital, Bangkok, Thailand
| | - Nuntaya Pornmun
- Faculty of Medicine Siriraj Hospital, Siriraj Center of Research Excellence in Dengue and Emerging Pathogens, Mahidol University, Bangkok, Thailand
- Faculty of Medicine Siriraj Hospital, Division of Dengue Hemorrhagic Fever Research, Mahidol University, Bangkok, Thailand
| | - Ranyikar Poraha
- Faculty of Medicine Siriraj Hospital, Siriraj Center of Research Excellence in Dengue and Emerging Pathogens, Mahidol University, Bangkok, Thailand
- Faculty of Medicine Siriraj Hospital, Division of Dengue Hemorrhagic Fever Research, Mahidol University, Bangkok, Thailand
| | - Kanokwan Sriruksa
- Pediatric Department, Khon Kaen Hospital, Ministry of Public Health, Khon Kaen, Thailand
| | - Wannee Limpitikul
- Pediatric Department, Songkhla Hospital, Ministry of Public Health, Songkhla, Thailand
| | - Panisadee Avirutnan
- Medical Biotechnology Research Unit, National Center for Genetic Engineering and Biotechnology, Siriraj Hospital, Bangkok, Thailand
- Faculty of Medicine Siriraj Hospital, Siriraj Center of Research Excellence in Dengue and Emerging Pathogens, Mahidol University, Bangkok, Thailand
- Faculty of Medicine Siriraj Hospital, Division of Dengue Hemorrhagic Fever Research, Mahidol University, Bangkok, Thailand
| | - Prida Malasit
- Medical Biotechnology Research Unit, National Center for Genetic Engineering and Biotechnology, Siriraj Hospital, Bangkok, Thailand
- Faculty of Medicine Siriraj Hospital, Siriraj Center of Research Excellence in Dengue and Emerging Pathogens, Mahidol University, Bangkok, Thailand
- Faculty of Medicine Siriraj Hospital, Division of Dengue Hemorrhagic Fever Research, Mahidol University, Bangkok, Thailand
| | - Chunya Puttikhunt
- Molecular Biology of Dengue and Flaviviruses Research Team, National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency, Pathum Thani, Thailand
- Medical Biotechnology Research Unit, National Center for Genetic Engineering and Biotechnology, Siriraj Hospital, Bangkok, Thailand
- Faculty of Medicine Siriraj Hospital, Siriraj Center of Research Excellence in Dengue and Emerging Pathogens, Mahidol University, Bangkok, Thailand
- * E-mail:
| |
Collapse
|
4
|
Kraivong R, Luangaram P, Phaenthaisong N, Malasit P, Kasinrerk W, Puttikhunt C. A simple approach to identify functional antibody variable genes in murine hybridoma cells that coexpress aberrant kappa light transcripts by restriction enzyme digestion. Asian Pac J Allergy Immunol 2019; 39:287-295. [PMID: 31175718 DOI: 10.12932/10.12932/ap-031218-0452] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND Specific binding to target protein epitopes by a mouse monoclonal antibody (mAb) relies on its variable domains. However, the isolation of functional variable gene transcripts is sometimes hindered by co-expression of aberrant transcripts in hybridoma cells. OBJECTIVE To develop general strategies for identifying the functional variable transcripts of both heavy (VH) and kappa light (Vκ) chains from mouse hybridomas. METHODS VH and Vκ genes of anti-dengue hybridoma clones were PCR-amplified using set of degenerate primers covering all mouse immunoglobulin families. Vκ amplicons were additionally digested with BciVI to eliminate aberrant Vκ transcripts. The productive VH and Vκ sequences were identified by Immunogenetics (IMGT) database analysis and cloned into a dual human IgG expression vector to generate chimeric antibodies (chAbs) in mammalian cells. The reactivity of chAbs was tested by immunoblot and immunofluorescent assays. RESULTS Among 17 tested hybridoma clones, 400 bp Vκ amplicons were obtained using eight different Vκ primers. Amplicons from productive Vκ transcripts are resistant to BciVI digestion, whereas BciVI-digested amplicons indicated aberrant Vκ transcripts. 500-bp productive VH amplicons could be obtained from all clones using a set of five VH primers. The productive VH/Vκ genes of three anti-dengue NS1 mAbs (m2G6, m1F11 and m1A4) were cloned and mouse-human chAbs were generated. The binding reactivities of the chAbs to dengue NS1 were similar to the original mAbs. CONCLUSIONS A general protocol to identify productive/functional VH and Vκ genes was demonstrated. The method is useful for producing chAbs and genetic archiving of valuable hybridoma cell lines.
Collapse
Affiliation(s)
- Romchat Kraivong
- Medical Biotechnology Research Unit, National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Bangkok, Thailand
| | - Prasit Luangaram
- Medical Biotechnology Research Unit, National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Bangkok, Thailand
| | - Narodom Phaenthaisong
- Medical Biotechnology Research Unit, National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Bangkok, Thailand
| | - Prida Malasit
- Medical Biotechnology Research Unit, National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Bangkok, Thailand.,Division of Dengue Hemorrhagic Fever Research, Department of Research and Development, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Watchara Kasinrerk
- Biomedical Technology Research Center, National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Chiang Mai, Thailand.,Division of Clinical Immunology, Department of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, Thailand
| | - Chunya Puttikhunt
- Medical Biotechnology Research Unit, National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Bangkok, Thailand.,Division of Dengue Hemorrhagic Fever Research, Department of Research and Development, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| |
Collapse
|
5
|
Kraivong R, Luangaram P, Phaenthaisong N, Malasit P, Kasinrerk W, Puttikhunt C. A simple approach to identify functional antibody variable genes in murine hybridoma cells that coexpress aberrant kappa light transcripts by restriction enzyme digestion. Asian Pac J Allergy Immunol 2019. [PMID: 31175718 DOI: 10.12932/ap-031218-0452] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND Specific binding to target protein epitopes by a mouse monoclonal antibody (mAb) relies on its variable domains. However, the isolation of functional variable gene transcripts is sometimes hindered by co-expression of aberrant transcripts in hybridoma cells. OBJECTIVE To develop general strategies for identifying the functional variable transcripts of both heavy (VH) and kappa light (Vκ) chains from mouse hybridomas. METHODS VH and Vκ genes of anti-dengue hybridoma clones were PCR-amplified using set of degenerate primers covering all mouse immunoglobulin families. Vκ amplicons were additionally digested with BciVI to eliminate aberrant Vκ transcripts. The productive VH and Vκ sequences were identified by Immunogenetics (IMGT) database analysis and cloned into a dual human IgG expression vector to generate chimeric antibodies (chAbs) in mammalian cells. The reactivity of chAbs was tested by immunoblot and immunofluorescent assays. RESULTS Among 17 tested hybridoma clones, 400 bp Vκ amplicons were obtained using eight different Vκ primers. Amplicons from productive Vκ transcripts are resistant to BciVI digestion, whereas BciVI-digested amplicons indicated aberrant Vκ transcripts. 500-bp productive VH amplicons could be obtained from all clones using a set of five VH primers. The productive VH/Vκ genes of three anti-dengue NS1 mAbs (m2G6, m1F11 and m1A4) were cloned and mouse-human chAbs were generated. The binding reactivities of the chAbs to dengue NS1 were similar to the original mAbs. CONCLUSIONS A general protocol to identify productive/functional VH and Vκ genes was demonstrated. The method is useful for producing chAbs and genetic archiving of valuable hybridoma cell lines.
Collapse
Affiliation(s)
- Romchat Kraivong
- Medical Biotechnology Research Unit, National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Bangkok, Thailand
| | - Prasit Luangaram
- Medical Biotechnology Research Unit, National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Bangkok, Thailand
| | - Narodom Phaenthaisong
- Medical Biotechnology Research Unit, National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Bangkok, Thailand
| | - Prida Malasit
- Medical Biotechnology Research Unit, National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Bangkok, Thailand.,Division of Dengue Hemorrhagic Fever Research, Department of Research and Development, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Watchara Kasinrerk
- Biomedical Technology Research Center, National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Chiang Mai, Thailand.,Division of Clinical Immunology, Department of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, Thailand
| | - Chunya Puttikhunt
- Medical Biotechnology Research Unit, National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Bangkok, Thailand.,Division of Dengue Hemorrhagic Fever Research, Department of Research and Development, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| |
Collapse
|
6
|
Kraivong R, Vasanawathana S, Limpitikul W, Malasit P, Tangthawornchaikul N, Botto M, Screaton GR, Mongkolsapaya J, Pickering MC. Complement alternative pathway genetic variation and Dengue infection in the Thai population. Clin Exp Immunol 2013; 174:326-34. [PMID: 23919682 PMCID: PMC3828836 DOI: 10.1111/cei.12184] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/30/2013] [Indexed: 12/21/2022] Open
Abstract
Dengue disease is a mosquito-borne infection caused by Dengue virus. Infection may be asymptomatic or variably manifest as mild Dengue fever (DF) to the most severe form, Dengue haemorrhagic fever (DHF). Mechanisms that influence disease severity are not understood. Complement, an integral component of the immune system, is activated during Dengue infection and the degree of activation increases with disease severity. Activation of the complement alternative pathway is influenced by polymorphisms within activation (factor B rs12614/rs641153, C3 rs2230199) and regulatory [complement factor H (CFH) rs800292] proteins, collectively termed a complotype. Here, we tested the hypothesis that the complotype influences disease severity during secondary Dengue infection. In addition to the complotype, we also assessed two other disease-associated CFH polymorphisms (rs1061170, rs3753394) and a structural polymorphism within the CFH protein family. We did not detect any significant association between the examined polymorphisms and Dengue infection severity in the Thai population. However, the minor allele frequencies of the factor B and C3 polymorphisms were less than 10%, so our study was not sufficiently powered to detect an association at these loci. We were also unable to detect a direct interaction between CFH and Dengue NS1 using both recombinant NS1 and DV2-infected culture supernatants. We conclude that the complotype does not influence secondary Dengue infection severity in the Thai population.
Collapse
Affiliation(s)
- R Kraivong
- Molecular Immunology, Imperial College, London, UK
| | | | | | | | | | | | | | | | | |
Collapse
|
7
|
Thitithanyanont A, Engering A, Uiprasertkul M, Ekchariyawat P, Wiboon-ut S, Kraivong R, Limsalakpetch A, Kum-Arb U, Yongvanitchit K, Sa-Ard-Iam N, Rukyen P, Mahanonda R, Kawkitinarong K, Auewarakul P, Utaisincharoen P, Sirisinha S, Mason CJ, Fukuda MM, Pichyangkul S. Antiviral immune responses in H5N1-infected human lung tissue and possible mechanisms underlying the hyperproduction of interferon-inducible protein IP-10. Biochem Biophys Res Commun 2010; 398:752-8. [PMID: 20627090 PMCID: PMC2940995 DOI: 10.1016/j.bbrc.2010.07.017] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2010] [Accepted: 07/08/2010] [Indexed: 11/30/2022]
Abstract
Information on the immune response against H5N1 within the lung is lacking. Here we describe the sustained antiviral immune responses, as indicated by the expression of MxA protein and IFN-alpha mRNA, in autopsy lung tissue from an H5N1-infected patient. H5N1 infection of primary bronchial/tracheal epithelial cells and lung microvascular endothelial cells induced IP-10, and also up-regulated the retinoic acid-inducible gene-I (RIG-I). Down-regulation of RIG-I gene expression decreased IP-10 response. Co-culturing of H5N1-infected pulmonary cells with TNF-alpha led to synergistically enhanced production of IP-10. In the absence of viral infection, TNF-alpha and IFN-alpha also synergistically enhanced IP-10 response. Methylprednisolone showed only a partial inhibitory effect on this chemokine response. Our findings strongly suggest that both the H5N1 virus and the locally produced antiviral cytokines; IFN-alpha and TNF-alpha may have an important role in inducing IP-10 hyperresponse, leading to inflammatory damage in infected lung.
Collapse
Affiliation(s)
| | - Anneke Engering
- U.S. Army Medical Component of the Armed Forces Research Institute of Medical Science, Bangkok, Thailand
| | - Monkol Uiprasertkul
- Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | | | | | | | - Amporn Limsalakpetch
- U.S. Army Medical Component of the Armed Forces Research Institute of Medical Science, Bangkok, Thailand
| | - Utaiwan Kum-Arb
- U.S. Army Medical Component of the Armed Forces Research Institute of Medical Science, Bangkok, Thailand
| | - Kosol Yongvanitchit
- U.S. Army Medical Component of the Armed Forces Research Institute of Medical Science, Bangkok, Thailand
| | | | - Pimprapa Rukyen
- Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand
| | | | | | - Prasert Auewarakul
- Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | | | | | - Carl J Mason
- U.S. Army Medical Component of the Armed Forces Research Institute of Medical Science, Bangkok, Thailand
| | - Mark M Fukuda
- U.S. Army Medical Component of the Armed Forces Research Institute of Medical Science, Bangkok, Thailand
| | - Sathit Pichyangkul
- U.S. Army Medical Component of the Armed Forces Research Institute of Medical Science, Bangkok, Thailand
| |
Collapse
|