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Zhou W, He P, Liu H, Wei H, Yu J. A luciferase based automated assay for rapid and sensitive detection of SARS-CoV-2 antibodies. Anal Chim Acta 2023; 1238:340633. [PMID: 36464447 PMCID: PMC9672313 DOI: 10.1016/j.aca.2022.340633] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 11/12/2022] [Accepted: 11/15/2022] [Indexed: 11/17/2022]
Abstract
The Coronavirus disease 2019 (COVID-19) pandemic brings great challenges to the public health and social economics around the world. As the pandemic continues and the mass vaccination goes on, monitoring the antibodies is particularly important for the epidemiological survey and vaccine assessment. Here, we developed a luciferase immunoprecipitation assay combined with an automated platform to detect anti-Receptor Binding Domain (RBD) antibody, where protein A and protein G modified magnetic beads were used to capture antibodies in serum samples and SARS-CoV-2 RBD was fused with Gaussia luciferase to label the captured target antibodies. The whole detection procedure can be completed within 20 min. The developed assay has proven up to 32 times more sensitive than ELISA for the detection of RBD antibodies. Furthermore, the results of the antibody detection of sera from vaccination as well as convalescence displayed good performance. The automated platform may provide a powerful tool for the control of COVID-19 pandemic by vaccination and the research of SARS-CoV-2 seroconversion.
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Affiliation(s)
- Wenhao Zhou
- CAS Key Laboratory of Special Pathogens and Biosafety, Center for Biosafety Mega-Science, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, 430071, China,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Ping He
- CAS Key Laboratory of Special Pathogens and Biosafety, Center for Biosafety Mega-Science, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, 430071, China,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Huan Liu
- CAS Key Laboratory of Special Pathogens and Biosafety, Center for Biosafety Mega-Science, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, 430071, China,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Hongping Wei
- CAS Key Laboratory of Special Pathogens and Biosafety, Center for Biosafety Mega-Science, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, 430071, China,University of Chinese Academy of Sciences, Beijing, 100049, China,Corresponding author. No.44 Xiaohongshan, Wuchang, Wuhan, Hubei, 430071, China
| | - Junping Yu
- CAS Key Laboratory of Special Pathogens and Biosafety, Center for Biosafety Mega-Science, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, 430071, China,University of Chinese Academy of Sciences, Beijing, 100049, China,Corresponding author. No.44 Xiaohongshan, Wuchang, Wuhan, Hubei, 430071, China
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Marzinotto I, Dottori L, Baldaro F, Dilaghi E, Brigatti C, Bazzigaluppi E, Esposito G, Davidson HW, Piemonti L, Lampasona V, Lahner E. Intrinsic factor autoantibodies by luminescent immuno-precipitation system in patients with corpus atrophic gastritis. J Transl Autoimmun 2022; 4:100131. [PMID: 35005595 PMCID: PMC8716657 DOI: 10.1016/j.jtauto.2021.100131] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 10/28/2021] [Accepted: 10/29/2021] [Indexed: 11/30/2022] Open
Abstract
Background Corpus atrophic gastritis (CAG) may lead to intrinsic factor (IF) deficiency and vitamin B12 malabsorption. Intrinsic factor autoantibodies (IFA) are considered markers of pernicious anemia, but their clinical utility in CAG has not been evaluated. This study aimed to assess IFA in CAG patients and controls using a luciferase immunoprecipitation system (LIPS). Methods Recombinant nanoluciferase-tagged IF secreted from transfected Expi293F cells was used as antigen in an IFA-LIPS assay. IFA IgG were measured in sera from subjects undergoing gastroscopy and biopsy (updated Sydney system) mainly for anemia (57%) or dyspepsia (34%). This cohort comprised 105 patients with histologically-proven-CAG (cases: median age 64 years, 68% females) and 110 subjects with suspected CAG that were histologically negative (controls: median age 67 years, 54% females). Cut-off values were selected by Q-Q-plot analysis (negative: <2.5 arbitrary units). Results IFA levels were higher in cases than in controls (Mann-Whitney:p < 10−5). The ROC-AUC was 0.67 (95%CI 0.60–0.73, p < 0.0001). The IFA LIPS sensitivity and specificity for CAG were 32% (95% CI 24–42) and 95% (95% CI 90–99). This diagnostic performance remained similar after stratification for the presence/absence of anemia, dyspepsia or vitamin B12 deficiency. IFA levels were higher in females compared with males (p = 0.0127). In females aged <65 years, IFA-positives were more prevalent than in males (43.5% vs 6.6%, p = 0.011). Conclusions The IFA-LIPS assay discriminated between CAG patients and controls showing a good specificity (95%) at the cost of sensitivity (32%). IFA-positivity occurred independently from anemia and vitamin B12 deficiency, but was more frequent in younger females. IFA testing should be considered in patients at high clinical suspicion of CAG. A novel diagnostic autoantibody test for intrinsic factor autoantibodies using a LIPS in histologically-proven CAG patients and controls. This assay discriminated between patients and controls with a good specificity and a relatively low sensitivity that reflects the likely low prevalence of intrinsic factor antibodies in CAG. Positivity occurred independently from anemia and vitamin B12 deficiency. Intrinsic factor antibodies should be assessed in patients at high clinical suspicion of CAG.
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Affiliation(s)
- Ilaria Marzinotto
- San Raffaele Diabetes Research Institute, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Ludovica Dottori
- Medical-Surgical Department of Clinical Sciences and Translational Medicine, Sant'Andrea Hospital, School of Medicine, University Sapienza, Rome, Italy
| | - Francesca Baldaro
- Medical-Surgical Department of Clinical Sciences and Translational Medicine, Sant'Andrea Hospital, School of Medicine, University Sapienza, Rome, Italy
| | - Emanuele Dilaghi
- Medical-Surgical Department of Clinical Sciences and Translational Medicine, Sant'Andrea Hospital, School of Medicine, University Sapienza, Rome, Italy
| | - Cristina Brigatti
- San Raffaele Diabetes Research Institute, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Elena Bazzigaluppi
- San Raffaele Diabetes Research Institute, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Gianluca Esposito
- Medical-Surgical Department of Clinical Sciences and Translational Medicine, Sant'Andrea Hospital, School of Medicine, University Sapienza, Rome, Italy
| | - Howard W Davidson
- Barbara Davis Center for Diabetes, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Lorenzo Piemonti
- San Raffaele Diabetes Research Institute, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Vito Lampasona
- San Raffaele Diabetes Research Institute, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Edith Lahner
- Medical-Surgical Department of Clinical Sciences and Translational Medicine, Sant'Andrea Hospital, School of Medicine, University Sapienza, Rome, Italy
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Temmam S, Barbarino A, Maso D, Behillil S, Enouf V, Huon C, Jaraud A, Chevallier L, Backovic M, Pérot P, Verwaerde P, Tiret L, van der Werf S, Eloit M. Absence of SARS-CoV-2 infection in cats and dogs in close contact with a cluster of COVID-19 patients in a veterinary campus. One Health 2020; 10:100164. [PMID: 32904469 PMCID: PMC7455794 DOI: 10.1016/j.onehlt.2020.100164] [Citation(s) in RCA: 78] [Impact Index Per Article: 19.5] [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] [Received: 07/06/2020] [Revised: 08/18/2020] [Accepted: 08/18/2020] [Indexed: 01/03/2023] Open
Abstract
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), which originated in Wuhan, China, in 2019, is responsible for the COVID-19 pandemic. It is now accepted that the wild fauna, probably bats, constitute the initial reservoir of the virus, but little is known about the role pets can play in the spread of the disease in human communities, knowing the ability of SARS-CoV-2 to infect some domestic animals. In this cross-sectional study, we tested the antibody response in a cluster of 21 domestic pets (9 cats and 12 dogs) living in close contact with their owners (belonging to a veterinary community of 20 students) in which two students tested positive for COVID-19 and several others (n = 11/18) consecutively showed clinical signs (fever, cough, anosmia, etc.) compatible with COVID-19 infection. Although a few pets presented many clinical signs indicative for a coronavirus infection, no antibodies against SARS-CoV-2 were detectable in their blood one month after the index case was reported, using an immunoprecipitation assay. These original data can serve a better evaluation of the host range of SARS-CoV-2 in natural environment exposure conditions.
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Affiliation(s)
- Sarah Temmam
- Institut Pasteur, Pathogen Discovery Laboratory, Paris, France
- Institut Pasteur, The OIE Collaborating Centre for Detection and Identification in Humans of Emerging Animal Pathogens, Paris, France
| | - Alix Barbarino
- École nationale vétérinaire d'Alfort, Maisons-Alfort, France
| | - Djérène Maso
- École nationale vétérinaire d'Alfort, Maisons-Alfort, France
| | - Sylvie Behillil
- Institut Pasteur, National Reference Center for Respiratory Viruses, Molecular Genetics of RNA Viruses, CNRS-UMR 3569, Univ Paris, Paris, France
| | - Vincent Enouf
- Institut Pasteur, National Reference Center for Respiratory Viruses, Molecular Genetics of RNA Viruses, CNRS-UMR 3569, Univ Paris, Paris, France
| | - Christèle Huon
- Institut Pasteur, Pathogen Discovery Laboratory, Paris, France
| | - Ambre Jaraud
- École nationale vétérinaire d'Alfort, Maisons-Alfort, France
- Univ Paris Est Creteil, INSERM, IMRB, Creteil, France
- EFS, IMRB, Creteil, France
| | - Lucie Chevallier
- École nationale vétérinaire d'Alfort, Maisons-Alfort, France
- Univ Paris Est Creteil, INSERM, IMRB, Creteil, France
- EFS, IMRB, Creteil, France
| | - Marija Backovic
- Institut Pasteur, Unité de Virologie Structurale - CNRS, UMR3569, Paris, France
| | - Philippe Pérot
- Institut Pasteur, Pathogen Discovery Laboratory, Paris, France
- Institut Pasteur, The OIE Collaborating Centre for Detection and Identification in Humans of Emerging Animal Pathogens, Paris, France
| | - Patrick Verwaerde
- École nationale vétérinaire d'Alfort, Maisons-Alfort, France
- Univ Paris Est Creteil, INSERM, IMRB, Creteil, France
| | - Laurent Tiret
- École nationale vétérinaire d'Alfort, Maisons-Alfort, France
- Univ Paris Est Creteil, INSERM, IMRB, Creteil, France
- EFS, IMRB, Creteil, France
| | - Sylvie van der Werf
- Institut Pasteur, National Reference Center for Respiratory Viruses, Molecular Genetics of RNA Viruses, CNRS-UMR 3569, Univ Paris, Paris, France
| | - Marc Eloit
- Institut Pasteur, Pathogen Discovery Laboratory, Paris, France
- Institut Pasteur, The OIE Collaborating Centre for Detection and Identification in Humans of Emerging Animal Pathogens, Paris, France
- École nationale vétérinaire d'Alfort, Maisons-Alfort, France
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Aye KM, Nagayasu E, Nyunt MH, Zaw NN, Thant KZ, Kyaw MP, Maruyama H. Seroprevalence of toxoplasmosis among reproductive-aged women in Myanmar and evaluation of luciferase immunoprecipitation system assay. BMC Infect Dis 2020; 20:906. [PMID: 33256616 PMCID: PMC7706230 DOI: 10.1186/s12879-020-05650-y] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Accepted: 11/22/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUNDS Primary infection with Toxoplasma gondii during pregnancy can pose serious health problems for the fetus. However, the epidemiological status of toxoplasmosis among reproductive-aged population in Myanmar is largely unknown. Although luciferase immunoprecipitation system (LIPS) assays for serodiagnosis of toxoplasmosis was developed mostly using mouse infection model, had not been tested by using field-derived human samples. METHODS A total of 251 serum samples were collected from reproductive-aged women, residing in Shwegyin township, Bago region, Myanmar and analyzed with a commercial ELISA kit, as well as in-house LIPS assays. RESULTS The overall seroprevalence for Toxoplasma gondii infection by the commercial ELISA was 11.5%. No clear risk factor was identified except for being in the younger age group (15-30 years old). Overall, LIPS assays showed low sensitivity when the commercial ELSA was used as a reference test. CONCLUSION We identified the epidemiological situation of toxoplasmosis in some rural communities in Myanmar. The data obtained here will serve as a primary information for the effort to reduce toxoplasmosis in this region. Although looked promising in the previous experiments with mouse infection model, we found that the reported LIPS procedures need further improvements to increase the sensitivities.
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Affiliation(s)
- Khin Myo Aye
- Department of Medical Research, Ministry of Health and Sports, Yangon, Myanmar.,Division of Parasitology, Department of Infectious Diseases, Faculty of Medicine, University of Miyazaki, Kiyotake, Japan
| | - Eiji Nagayasu
- Division of Parasitology, Department of Infectious Diseases, Faculty of Medicine, University of Miyazaki, Kiyotake, Japan.
| | - Myat Htut Nyunt
- Department of Medical Research, Ministry of Health and Sports, Yangon, Myanmar
| | - Ni Ni Zaw
- Department of Medical Research, Ministry of Health and Sports, Yangon, Myanmar
| | - Kyaw Zin Thant
- Department of Medical Research, Ministry of Health and Sports, Yangon, Myanmar
| | - Myat Phone Kyaw
- Department of Medical Research, Ministry of Health and Sports, Yangon, Myanmar
| | - Haruhiko Maruyama
- Division of Parasitology, Department of Infectious Diseases, Faculty of Medicine, University of Miyazaki, Kiyotake, Japan
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Lahner E, Marzinotto I, Brigatti C, Davidson H, Wenzlau J, Piemonti L, Annibale B, Lampasona V. Measurement of Autoantibodies to Gastric H+,K+-ATPase (ATP4A/B) Using a Luciferase Immunoprecipitation System (LIPS). Methods Mol Biol 2019; 1901:113-131. [PMID: 30539573 DOI: 10.1007/978-1-4939-8949-2_10] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [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] [Indexed: 06/09/2023]
Abstract
The Luciferase Immuno Precipitation System (LIPS) enables the detection of specific serum antibodies by immunoprecipitation of recombinant antigens tagged with a luciferase reporter. Here we describe LIPS assays for the quantification of autoantibodies to the H+, K+-ATPase A (ATP4A) and B (ATP4B) subunits, two serological markers of autoimmune atrophic gastritis and pernicious anemia. In particular, we will describe the expression of luciferase-tagged recombinant ATP4A and ATP4B, their immunoprecipitation with test sera, the recovery and washing of immune-complexes with a protein-A coated resin, and the quantification of autoantibodies by addition of a luciferase substrate and the measurement of the light output from captured luciferase-tagged antigens.
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Affiliation(s)
- Edith Lahner
- Medical-Surgical Department of Clinical Sciences and Translational Medicine, Sant'Andrea Hospital, Sapienza University of Rome, Rome, Italy
| | - Ilaria Marzinotto
- Division of Genetics and Cell Biology, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Cristina Brigatti
- Beta Cell Biology Unit, Diabetes Research Institute, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Howard Davidson
- Barbara Davis Center for Diabetes, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Janet Wenzlau
- Barbara Davis Center for Diabetes, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Lorenzo Piemonti
- Beta Cell Biology Unit, Diabetes Research Institute, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Bruno Annibale
- Medical-Surgical Department of Clinical Sciences and Translational Medicine, Sant'Andrea Hospital, Sapienza University of Rome, Rome, Italy
| | - Vito Lampasona
- Division of Genetics and Cell Biology, IRCCS San Raffaele Scientific Institute, Milan, Italy.
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Aye KM, Nagayasu E, Baba M, Yoshida A, Takashima Y, Maruyama H. Evaluation of LIPS ( luciferase immunoprecipitation system) for serodiagnosis of Toxoplasmosis. J Immunol Methods 2018; 462:91-100. [PMID: 30201391 DOI: 10.1016/j.jim.2018.09.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [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: 04/13/2018] [Revised: 08/17/2018] [Accepted: 09/06/2018] [Indexed: 01/05/2023]
Abstract
Development of reliable, quantitative technologies for serodiagnosis of Toxoplasma gondii infection remains desirable. The luciferase immunoprecipitation system (LIPS) is a relatively simple, highly sensitive, and rapid quantitative immunoassay. The major advantages of this assay over ELISA are a wider dynamic range, shorter overall assay time, and less sample volume. In this study, we aimed to use this method for the serodiagnosis of toxoplasmosis. Recombinant Toxoplasma antigens (dense granule antigens GRA6, GRA7, and GRA8 and bradyzoite antigen BAG1) fused with nanoluciferase (Nluc, a small luciferase enzyme) were expressed in Escherichia coli, purified, and tested in LIPS assays with sera from experimental mice infected with T. gondii and a WHO standard anti-Toxoplasma human immunoglobulin (TOXM). In the experimentally infected mice, LIPS assays detected antibodies against Nluc-GRA6, Nluc-GRA7, and Nluc-GRA8 as early as day 14, whereas antibodies against Nluc-BAG1 remained undetected until day 21 and then showed significant elevation on day 60. In TOXM sera, LIPS assays with each Nluc recombinant protein produced reliable standard curves with a coefficient of determination (R2) of 0.980-0.989 for GRA6, 0.986-0.990 for GRA7, 0.998-0.999 for GRA8, and 0.942-0.987 for BAG1. The detection limits were estimated to be 3.9, 2, 1, and 1 IU/ml for rGRA6, rGRA7, rGRA8, and rBAG1, respectively. The LIPS assay for toxoplasmosis could detect antibodies against T. gondii in the mouse and human sera with a reasonably high sensitivity. We consider the LIPS assay to be a promising alternative tool for screening, diagnosing, and monitoring toxoplasmosis. In particular, detection of antibodies against BAG1 may be useful for a longitudinal seroprevalence study in suspected high-risk areas on the basis of its elevated serum concentration in the chronic phase.
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Affiliation(s)
- Khin Myo Aye
- Division of Parasitology, Department of Infectious Diseases, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan; Parasitology Research Division, Department of Medical Research, Yangon, Myanmar.
| | - Eiji Nagayasu
- Division of Parasitology, Department of Infectious Diseases, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan.
| | - Minami Baba
- Department of Veterinary Parasitology, Faculty of Applied Biological Sciences, Gifu University, Gifu, Japan; Proteo-Science Center, Division of Molecular Parasitology, Ehime University, Toon, Japan.
| | - Ayako Yoshida
- Laboratory of Veterinary Parasitic Diseases, Department of Veterinary Sciences, Faculty of Agriculture, University of Miyazaki, Miyazaki, Japan; Center for Animal Disease Control, University of Miyazaki, Miyazaki, Japan.
| | - Yasuhiro Takashima
- Department of Veterinary Parasitology, Faculty of Applied Biological Sciences, Gifu University, Gifu, Japan; Center for Highly Advanced Integration of Nano and Life Sciences, Gifu University (G-CHAIN), Gifu, Japan.
| | - Haruhiko Maruyama
- Division of Parasitology, Department of Infectious Diseases, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan.
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