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de Figueiredo AM, Glória JC, Chaves YO, Neves WLL, Mariúba LAM. Diagnostic applications of microsphere-based flow cytometry: A review. Exp Biol Med (Maywood) 2022; 247:1852-1861. [PMID: 35974694 PMCID: PMC9679357 DOI: 10.1177/15353702221113856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Microsphere-based flow cytometry is a highly sensitive emerging technology for specific detection and clinical analysis of antigens, antibodies, and nucleic acids of interest. In this review, studies that focused on the application of flow cytometry as a viable alternative for the investigation of infectious diseases were analyzed. Many of the studies involve research aimed at epidemiological surveillance, vaccine candidates and early diagnosis, non-infectious diseases, specifically cancer, and emphasize the simultaneous detection of biomarkers for early diagnosis, with accurate results in a non-invasive approach. The possibility of carrying out multiplexed assays affords this technique high versatility and performance, which is evidenced in a series of clinical studies that have verified the ability to detect several molecules in low concentrations and with minimal sample volume. As such, we demonstrate that microsphere-based flow cytometry presents itself as a promising technique that can be adopted as a fundamental element in the development of new diagnostic methods for a number of diseases.
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Affiliation(s)
| | - Juliane Corrêa Glória
- Programa de Pós-Graduação em Biotecnologia, Universidade Federal do Amazonas (UFAM), Manaus 69067-005, Brazil
| | - Yury Oliveira Chaves
- Instituto Leônidas e Maria Deane (ILMD), Fundação Oswaldo Cruz (FIOCRUZ), Manaus 69057-070, Brazil,Programa de Pós-graduação em biologia parasitária, Instituto Oswaldo Cruz – FIOCRUZ, Manaus 21040-360, Brazil
| | - Walter Luiz Lima Neves
- Programa de Pós-Graduação em Imunologia Básica e Aplicada, Instituto de Ciências Biológicas, Universidade Federal do Amazonas (UFAM), Manaus 69067-00, Brazil
| | - Luis André Morais Mariúba
- Programa de Pós-Graduação em Biotecnologia, Universidade Federal do Amazonas (UFAM), Manaus 69067-005, Brazil,Instituto Leônidas e Maria Deane (ILMD), Fundação Oswaldo Cruz (FIOCRUZ), Manaus 69057-070, Brazil,Programa de Pós-Graduação em Imunologia Básica e Aplicada, Instituto de Ciências Biológicas, Universidade Federal do Amazonas (UFAM), Manaus 69067-00, Brazil,Luis André Morais Mariúba.
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2
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Wu Y, Wu X, Chen J, Hu J, Huang X, Zhou B. A novel protein chip for simultaneous detection of antibodies against four epidemic swine viruses in China. BMC Vet Res 2020; 16:162. [PMID: 32456688 PMCID: PMC7249397 DOI: 10.1186/s12917-020-02375-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Accepted: 05/14/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND At present, pig industry in China is faced with the complex situation of mixed infection caused by multiple pathogens. It is urgent to develop some new high-throughput molecular diagnosis assays to simultaneously detect pathogens or antibodies. Biochip array technology has made it possible to screen thousands of samples simultaneously; it has been twice named as one of the top 10 scientific and technological breakthroughs. Studies have reported encouraging results using protein biochips for detecting antibodies against avian infectious bronchitis virus and ruminant bluetongue virus, but the research of this technology for the diagnosis of swine diseases is still sparse. RESULTS In this study, a novel protein chip was developed that can simultaneously detect the antibodies of four important swine viruses as follow, classical swine fever virus (CSFV), porcine parvovirus (PPV), Japanese encephalitis virus (JEV), and porcine reproductive and respiratory syndrome virus (PRRSV). Four prokaryotic expression plasmids pET-32a-E2 of CSFV, -VP2 of PPV, -EDIII of JEV, and -N of PRRSV were induced by IPTG (Isopropyl β-D-1-Thiogalactopyranoside) and overexpressed in E.coli, respectively. The purified proteins were identified by Western blotting and then printed on epoxy-coated glass slides. The optimized parameters of this diagnostic chip showed that the spotting concentrations of E2、VP2、EDIII、N proteins were 0.2, 0.4, 0.4, and 0.4 mg/mL. The optimal primary and secondary antibody dilutions were 1:50 and 1: 600. Compared with the commercial ELISA (Enzyme-linked immunosorbent assay) kits, the positive and negative coincidence rates of this chip were 95.8% ~ 100 and 86.2% ~ 100%, as well as, no cross-reaction. CONCLUSION This protein chip provided a fast, specific, and sensitive method for simultaneous detection of antibodies in clinical serum samples. Compared with traditional methods, this protein chip can monitor very small amount of serum.
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Affiliation(s)
- Yue Wu
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Xudan Wu
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Jing Chen
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Jingfei Hu
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Xiaobo Huang
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Bin Zhou
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China.
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3
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Carter MJ, Gurung P, Jones C, Rajkarnikar S, Kandasamy R, Gurung M, Thorson S, Gautam MC, Prajapati KG, Khadka B, Maharjan A, Knight JC, Murdoch DR, Darton TC, Voysey M, Wahl B, O'Brien KL, Kelly S, Ansari I, Shah G, Ekström N, Melin M, Pollard AJ, Kelly DF, Shrestha S. Assessment of an Antibody-in-Lymphocyte Supernatant Assay for the Etiological Diagnosis of Pneumococcal Pneumonia in Children. Front Cell Infect Microbiol 2020; 9:459. [PMID: 32039044 PMCID: PMC6988833 DOI: 10.3389/fcimb.2019.00459] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Accepted: 12/16/2019] [Indexed: 12/26/2022] Open
Abstract
New diagnostic tests for the etiology of childhood pneumonia are needed. We evaluated the antibody-in-lymphocyte supernatant (ALS) assay to detect immunoglobulin (Ig) G secretion from ex vivo peripheral blood mononuclear cell (PBMC) culture, as a potential diagnostic test for pneumococcal pneumonia. We enrolled 348 children with pneumonia admitted to Patan Hospital, Kathmandu, Nepal between December 2015 and September 2016. PBMCs sampled from participants were incubated for 48 h before harvesting of cell culture supernatant (ALS). We used a fluorescence-based multiplexed immunoassay to measure the concentration of IgG in ALS against five conserved pneumococcal protein antigens. Of children with pneumonia, 68 had a confirmed etiological diagnosis: 12 children had pneumococcal pneumonia (defined as blood or pleural fluid culture-confirmed; or plasma CRP concentration ≥60 mg/l and nasopharyngeal carriage of serotype 1 pneumococci), and 56 children had non-pneumococcal pneumonia. Children with non-pneumococcal pneumonia had either a bacterial pathogen isolated from blood (six children); or C-reactive protein <60 mg/l, absence of radiographic consolidation and detection of a pathogenic virus by multiplex PCR (respiratory syncytial virus, influenza viruses, or parainfluenza viruses; 23 children). Concentrations of ALS IgG to all five pneumococcal proteins were significantly higher in children with pneumococcal pneumonia than in children with non-pneumococcal pneumonia. The concentration of IgG in ALS to the best-performing antigen discriminated between children with pneumococcal and non-pneumococcal pneumonia with a sensitivity of 1.0 (95% CI 0.73-1.0), specificity of 0.66 (95% CI 0.52-0.78) and area under the receiver-operating characteristic curve (AUROCC) 0.85 (95% CI 0.75-0.94). Children with pneumococcal pneumonia were older than children with non-pneumococcal pneumonia (median 5.6 and 2.0 years, respectively, p < 0.001). When the analysis was limited to children ≥2 years of age, assay of IgG ALS to pneumococcal proteins was unable to discriminate between children with pneumococcal pneumonia and non-pneumococcal pneumonia (AUROCC 0.67, 95% CI 0.47-0.88). This method detected spontaneous secretion of IgG to pneumococcal protein antigens from cultured PBMCs. However, when stratified by age group, assay of IgG in ALS to pneumococcal proteins showed limited utility as a test to discriminate between pneumococcal and non-pneumococcal pneumonia in children.
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Affiliation(s)
- Michael J. Carter
- Oxford Vaccine Group, Department of Paediatrics, University of Oxford, Oxford, United Kingdom
- NIHR Oxford Biomedical Research Centre, Oxford, United Kingdom
- Patan Academy of Health Sciences, Kathmandu, Nepal
- School of Life Course Sciences, King's College London, London, United Kingdom
- Wellcome Centre for Human Genetics, University of Oxford, Oxford, United Kingdom
| | | | - Claire Jones
- Oxford Vaccine Group, Department of Paediatrics, University of Oxford, Oxford, United Kingdom
- NIHR Oxford Biomedical Research Centre, Oxford, United Kingdom
| | | | - Rama Kandasamy
- Oxford Vaccine Group, Department of Paediatrics, University of Oxford, Oxford, United Kingdom
- NIHR Oxford Biomedical Research Centre, Oxford, United Kingdom
| | - Meeru Gurung
- Patan Academy of Health Sciences, Kathmandu, Nepal
| | | | | | | | - Bibek Khadka
- Patan Academy of Health Sciences, Kathmandu, Nepal
| | | | - Julian C. Knight
- Wellcome Centre for Human Genetics, University of Oxford, Oxford, United Kingdom
| | - David R. Murdoch
- Department of Pathology, University of Otago, Christchurch, Christchurch, New Zealand
| | - Thomas C. Darton
- Oxford Vaccine Group, Department of Paediatrics, University of Oxford, Oxford, United Kingdom
- NIHR Oxford Biomedical Research Centre, Oxford, United Kingdom
- Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield Medical School, Sheffield, United Kingdom
| | - Merryn Voysey
- Oxford Vaccine Group, Department of Paediatrics, University of Oxford, Oxford, United Kingdom
- NIHR Oxford Biomedical Research Centre, Oxford, United Kingdom
| | - Brian Wahl
- International Vaccine Access Center, Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, United States
| | - Katherine L. O'Brien
- International Vaccine Access Center, Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, United States
| | - Sarah Kelly
- Oxford Vaccine Group, Department of Paediatrics, University of Oxford, Oxford, United Kingdom
- NIHR Oxford Biomedical Research Centre, Oxford, United Kingdom
| | - Imran Ansari
- Patan Academy of Health Sciences, Kathmandu, Nepal
| | - Ganesh Shah
- Patan Academy of Health Sciences, Kathmandu, Nepal
| | - Nina Ekström
- Expert Microbiology Unit, National Institute for Health and Welfare (THL), Helsinki, Finland
| | - Merit Melin
- Expert Microbiology Unit, National Institute for Health and Welfare (THL), Helsinki, Finland
| | - Andrew J. Pollard
- Oxford Vaccine Group, Department of Paediatrics, University of Oxford, Oxford, United Kingdom
- NIHR Oxford Biomedical Research Centre, Oxford, United Kingdom
| | - Dominic F. Kelly
- Oxford Vaccine Group, Department of Paediatrics, University of Oxford, Oxford, United Kingdom
- NIHR Oxford Biomedical Research Centre, Oxford, United Kingdom
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4
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Rogier E, van den Hoogen L, Herman C, Gurrala K, Joseph V, Stresman G, Presume J, Romilus I, Mondelus G, Elisme T, Ashton R, Chang M, Lemoine JF, Druetz T, Eisele TP, Existe A, Boncy J, Drakeley C, Udhayakumar V. High-throughput malaria serosurveillance using a one-step multiplex bead assay. Malar J 2019; 18:402. [PMID: 31801556 PMCID: PMC6894145 DOI: 10.1186/s12936-019-3027-0] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Accepted: 11/21/2019] [Indexed: 01/21/2023] Open
Abstract
Background Serological data indicating the presence and level of antibodies against infectious disease antigens provides indicators of exposure and transmission patterns in a population. Laboratory testing for large-scale serosurveys is often hindered by time-consuming immunoassays that employ multiple tandem steps. Some nations have recently begun using malaria serosurveillance data to make inferences about the malaria exposure in their populations, and serosurveys have grown increasingly larger as more accurate estimates are desired. Presented here is a novel approach of antibody detection using bead-based immunoassay that involves incubating all assay reagents concurrently overnight. Results A serosurvey in was performed in Haiti in early 2017 with both sera (n = 712) and dried blood spots (DBS, n = 796) collected for the same participants. The Luminex® multiplex bead-based assay (MBA) was used to detect total IgG against 8 malaria antigens: PfMSP1, PvMSP1, PmMSP1, PfCSP, PfAMA1, PfLSA1, PfGLURP-R0, PfHRP2. All sera and DBS samples were assayed by MBA using a standard immunoassay protocol with multiple steps, as well a protocol where sample and all reagents were incubated together overnight—termed here the OneStep assay. When compared to a standard multi-step assay, this OneStep assay amplified the assay signal for IgG detection for all 8 malaria antigens. The greatest increases in assay signal were seen at the low- and mid-range IgG titers and were indicative of an enhancement in the analyte detection, not simply an increase in the background signal of the assay. Seroprevalence estimates were generally similar for this sample Haitian population for all antigens regardless of serum or DBS sample type or assay protocol used. Conclusions When using the MBA for IgG detection, overnight incubation for the test sample and all assay reagents greatly minimized hands-on time for laboratory staff. Enhanced IgG signal was observed with the OneStep assay for all 8 malaria antigens employed in this study, and seroprevalence estimates for this sample population were similar regardless of assay protocol used. This overnight incubation protocol has the potential to be deployed for large-scale malaria serosurveys for the high-throughput and timely collection of antibody data, particularly for malaria seroprevalence estimates.
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Affiliation(s)
- Eric Rogier
- Malaria Branch, Division of Parasitic Diseases and Malaria, Centers for Disease Control and Prevention, Atlanta, GA, 30329, USA.
| | - Lotus van den Hoogen
- Department of Infection Biology, London School of Hygiene & Tropical Medicine, London, WC1E 7HT, UK
| | - Camelia Herman
- Malaria Branch, Division of Parasitic Diseases and Malaria, Centers for Disease Control and Prevention, Atlanta, GA, 30329, USA.,CDC Foundation, Atlanta, GA, 30308, USA
| | - Kevin Gurrala
- Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Vena Joseph
- Center for Applied Malaria Research and Evaluation, Department of Tropical Medicine, Tulane University School of Public Health and Tropical Medicine, New Orleans, LA, 70112, USA
| | - Gillian Stresman
- Department of Infection Biology, London School of Hygiene & Tropical Medicine, London, WC1E 7HT, UK
| | - Jacquelin Presume
- Laboratoire National de Santé Publique (LNSP), Ministère de la Santé Publique et de la Population (MSPP), Port-au-Prince, Haiti
| | - Ithamare Romilus
- Laboratoire National de Santé Publique (LNSP), Ministère de la Santé Publique et de la Population (MSPP), Port-au-Prince, Haiti
| | - Gina Mondelus
- Laboratoire National de Santé Publique (LNSP), Ministère de la Santé Publique et de la Population (MSPP), Port-au-Prince, Haiti
| | - Tamara Elisme
- Laboratoire National de Santé Publique (LNSP), Ministère de la Santé Publique et de la Population (MSPP), Port-au-Prince, Haiti
| | - Ruth Ashton
- Center for Applied Malaria Research and Evaluation, Department of Tropical Medicine, Tulane University School of Public Health and Tropical Medicine, New Orleans, LA, 70112, USA
| | - Michelle Chang
- Malaria Branch, Division of Parasitic Diseases and Malaria, Centers for Disease Control and Prevention, Atlanta, GA, 30329, USA
| | - Jean F Lemoine
- Programme National de Contrôle de la Malaria/MSPP, Port-au-Prince, Haiti
| | - Thomas Druetz
- Center for Applied Malaria Research and Evaluation, Department of Tropical Medicine, Tulane University School of Public Health and Tropical Medicine, New Orleans, LA, 70112, USA.,Department of Social and Preventive Medicine, University of Montreal School of Public Health, Montreal, QC, H3X 1X9, Canada
| | - Thomas P Eisele
- Center for Applied Malaria Research and Evaluation, Department of Tropical Medicine, Tulane University School of Public Health and Tropical Medicine, New Orleans, LA, 70112, USA
| | - Alexandre Existe
- Laboratoire National de Santé Publique (LNSP), Ministère de la Santé Publique et de la Population (MSPP), Port-au-Prince, Haiti
| | - Jacques Boncy
- Laboratoire National de Santé Publique (LNSP), Ministère de la Santé Publique et de la Population (MSPP), Port-au-Prince, Haiti
| | - Chris Drakeley
- Department of Infection Biology, London School of Hygiene & Tropical Medicine, London, WC1E 7HT, UK
| | - Venkatachalam Udhayakumar
- Malaria Branch, Division of Parasitic Diseases and Malaria, Centers for Disease Control and Prevention, Atlanta, GA, 30329, USA
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5
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Li L, Bannantine JP, Campo JJ, Randall A, Grohn YT, Schilling MA, Katani R, Radzio-Basu J, Easterling L, Kapur V. Identification of Sero-Diagnostic Antigens for the Early Diagnosis of Johne's Disease using MAP Protein Microarrays. Sci Rep 2019; 9:17573. [PMID: 31772281 PMCID: PMC6879513 DOI: 10.1038/s41598-019-53973-x] [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: 04/10/2019] [Accepted: 11/07/2019] [Indexed: 01/20/2023] Open
Abstract
Considerable effort has been directed toward controlling Johne’s disease (JD), a chronic granulomatous intestinal inflammatory disease caused by Mycobacterium avium subsp. paratuberculosis (MAP) in cattle and other ruminants. However, progress in controlling the spread of MAP infection has been impeded by the lack of reliable diagnostic tests that can identify animals early in the infection process and help break the transmission chain. To identify reliable antigens for early diagnosis of MAP infection, we constructed a MAP protein array with 868 purified recombinant MAP proteins, and screened a total of 180 well-characterized serum samples from cows assigned to 4 groups based on previous serological and fecal test results: negative low exposure (NL, n = 30); negative high exposure (NH, n = 30); fecal-positive, ELISA-negative (F + E−, n = 60); and both fecal- and ELISA-positive (F + E+, n = 60). The analyses identified a total of 49 candidate antigens in the NH, F + E−, and F + E+ with reactivity compared with the NL group (p < 0.01), a majority of which have not been previously identified. While some of the antigens were identified as reactive in only one of the groups, others showed reactivity in multiple groups, including NH (n = 28), F + E− (n = 26), and F + E+ (n = 17) groups. Using combinations of top reactive antigens in each group, the results reveal sensitivities of 60.0%, 73.3%, and 81.7% in the NH, F + E−, and F + E+, respectively at 90% specificity, suggesting that early detection of infection in animals may be possible and enable better opportunities to reduce within herd transmission that may be otherwise missed by traditional serological assays that are biased towards more heavily infected animals. Together, the results suggest that several of the novel candidate antigens identified in this study, particularly those that were reactive in the NH and F + E− groups, have potential utility for the early sero-diagnosis of MAP infection.
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Affiliation(s)
- Lingling Li
- Department of Veterinary and Biomedical Sciences, The Pennsylvania State University, University Park, PA, United States of America.,Huck Institutes of Life Sciences, The Pennsylvania State University, University Park, PA, United States of America
| | - John P Bannantine
- National Animal Disease Center, USDA-ARS, Ames, IA, United States of America
| | - Joseph J Campo
- Antigen Discovery, Inc., Irvine, CA, United States of America
| | - Arlo Randall
- Antigen Discovery, Inc., Irvine, CA, United States of America
| | - Yrjo T Grohn
- Department of Population Medicine and Diagnostic Sciences, Cornell University, Ithaca, NY, United States of America
| | - Megan A Schilling
- Huck Institutes of Life Sciences, The Pennsylvania State University, University Park, PA, United States of America.,Department of Animal Science, Pennsylvania State University, University Park, PA, United States of America
| | - Robab Katani
- Huck Institutes of Life Sciences, The Pennsylvania State University, University Park, PA, United States of America.,Department of Animal Science, Pennsylvania State University, University Park, PA, United States of America.,Applied Biological and Biosafety Research Laboratory, The Pennsylvania State University, University Park, PA, United States of America
| | - Jessica Radzio-Basu
- Huck Institutes of Life Sciences, The Pennsylvania State University, University Park, PA, United States of America.,Applied Biological and Biosafety Research Laboratory, The Pennsylvania State University, University Park, PA, United States of America
| | - Laurel Easterling
- Huck Institutes of Life Sciences, The Pennsylvania State University, University Park, PA, United States of America.,Department of Animal Science, Pennsylvania State University, University Park, PA, United States of America
| | - Vivek Kapur
- Huck Institutes of Life Sciences, The Pennsylvania State University, University Park, PA, United States of America. .,Department of Animal Science, Pennsylvania State University, University Park, PA, United States of America. .,Applied Biological and Biosafety Research Laboratory, The Pennsylvania State University, University Park, PA, United States of America.
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6
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Sheen YH, Kizilbash S, Ryoo E, Wi CI, Park M, Abraham RS, Ryu E, Divekar R, Juhn Y. Relationship between asthma status and antibody response pattern to 23-valent pneumococcal vaccination. J Asthma 2019; 57:381-390. [PMID: 30784333 DOI: 10.1080/02770903.2019.1575394] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Objective: Asthma poses an increased risk for serious pneumococcal disease, but little is known about the influence of asthma status on the 23-valent serotype-specific pneumococcal antibody response. We examined differences in antibody titers between pre- and post-vaccination with 23-valent pneumococcal polysaccharide vaccine (PPSV-23) in relation to asthma status. Methods: Asthma status was retrospectively ascertained by the Predetermined Asthma Criteria in an existing vaccine cohort through comprehensive medical record review. Twenty-three serotype-specific pneumococcal antibody titers measured at baseline and 4-6 weeks post-vaccination were analyzed. Vaccine responses to PPSV-23 were calculated from pre- to post-vaccine titers for each of the serotypes. Results: Of the 64 eligible and enrolled subjects, 18 (28%) had asthma. Controls (i.e., subjects without asthma) demonstrated a statistically significant fold change response compared to their baseline for all serotypes, while those with asthma did not mount a significant response to serotypes 7F, 22F, and 23F. The overall vaccine response as measured by fold change over baseline was lower in subjects with asthma than controls. Conclusions: Poorer humoral immune responses to PPSV-23 as measured by fold change were more likely to be observed in subjects with asthma compared to controls. We recommend the consideration of asthma status when interpreting vaccine response for immune competence workup through larger studies. Further studies are warranted to replicate these findings.
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Affiliation(s)
- Youn H Sheen
- Department of Pediatric and Adolescent Medicine, Mayo Clinic, Rochester, MN, USA.,Department of Pediatrics, CHA University School of Medicine, Seoul, Korea
| | - Sarah Kizilbash
- Department of Pediatric and Adolescent Medicine, Mayo Clinic, Rochester, MN, USA.,Department of Pediatrics, School of Medicine, University of Minnesota, Twin Cities, MN, USA
| | - Eell Ryoo
- Department of Pediatric and Adolescent Medicine, Mayo Clinic, Rochester, MN, USA.,Department of Pediatrics, Gil Hospital, Gachon University, Incheon, Korea
| | - Chung-Il Wi
- Department of Pediatric and Adolescent Medicine, Mayo Clinic, Rochester, MN, USA
| | - Miguel Park
- Division of Allergic Diseases, Mayo Clinic, Rochester, MN, USA
| | - Roshini S Abraham
- Division of Clinical Biochemistry and Immunology, Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA
| | - Euijung Ryu
- Department of Health Sciences and Research, Mayo Clinic, Rochester, MN, USA
| | - Rohit Divekar
- Division of Allergic Diseases, Mayo Clinic, Rochester, MN, USA
| | - Young Juhn
- Department of Pediatric and Adolescent Medicine/Internal Medicine, Mayo Clinic, Rochester, MN, USA
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7
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Development and Validation of 13-plex Luminex-Based Assay for Measuring Human Serum Antibodies to Streptococcus pneumoniae Capsular Polysaccharides. mSphere 2018; 3:3/4/e00128-18. [PMID: 30089645 PMCID: PMC6083093 DOI: 10.1128/msphere.00128-18] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
The pneumococcal enzyme-linked immunosorbent assay (ELISA) measures IgG antibodies in human serum, and it is an important assay that supports licensure of pneumococcal vaccines. The immune correlate of protection, 0.35 µg/ml of IgG antibodies, was determined by the ELISA method. Pfizer has developed a new Luminex-based assay platform to replace the ELISA. These papers describe the important work of (i) validating the Luminex-based assay and (ii) bridging the immune correlate of protection (0.35 µg/ml IgG) to equivalent values reported by the Luminex platform. A Luminex-based direct immunoassay (dLIA) platform has been developed to replace the standardized pneumococcal enzyme-linked immunosorbent assay platform. The multiplex dLIA simultaneously measures the concentration of serum immunoglobulin G (IgG) antibodies specific for pneumococcal capsular polysaccharide (PnPS) serotypes 1, 3, 4, 5, 6A, 6B, 7F, 9V, 14, 18C, 19A, 19F, and 23F. The assay uses poly-l-lysine (PLL)-conjugated PnPS, chemically coupled to spectrally distinct Luminex microspheres. Assay validation experiments were performed using residual human serum samples obtained from 13-valent pneumococcal conjugate vaccine (13vPnC) clinical studies. Assay results are expressed as IgG antibody concentrations in micrograms per milliliter using the international reference serum, 007sp. The lower limit of quantitation (LLOQ) for all serotypes covered in the 13-plex dLIA fell within the range of 0.002 to 0.038 µg/ml serum IgG. The difference between the lower limit and upper limit of the assay range was >500-fold for all serotypes, and assay variability was <20% relative standard deviation (RSD) for all serotypes. IgG antibody measurements were shown to be serotype-specific (some cross-reactivity was observed only between the structurally related serotypes 6A and 6B as well as 19A and 19F), and no interference was observed between the serotypes when the assay was performed in the 13-plex format compared to the singleplex assays. The 13-plex dLIA platform developed by Pfizer Inc. generates up to 143 test results in a single 96-well plate and is a suitable replacement of the enzyme-linked immunosorbent assay (ELISA) platform for evaluating vaccine clinical trials. IMPORTANCE The pneumococcal enzyme-linked immunosorbent assay (ELISA) measures IgG antibodies in human serum, and it is an important assay that supports licensure of pneumococcal vaccines. The immune correlate of protection, 0.35 µg/ml of IgG antibodies, was determined by the ELISA method. Pfizer has developed a new Luminex-based assay platform to replace the ELISA. These papers describe the important work of (i) validating the Luminex-based assay and (ii) bridging the immune correlate of protection (0.35 µg/ml IgG) to equivalent values reported by the Luminex platform.
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8
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Borges IC, Andrade DC, Ekström N, Virta C, Melin M, Saukkoriipi A, Leinonen M, Ruuskanen O, Käyhty H, Nascimento-Carvalho CM. Comparison of serological assays using pneumococcal proteins or polysaccharides for detection of Streptococcus pneumoniae infection in children with community-acquired pneumonia. J Immunol Methods 2018; 460:72-78. [PMID: 29935210 DOI: 10.1016/j.jim.2018.06.011] [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: 05/15/2018] [Revised: 06/14/2018] [Accepted: 06/14/2018] [Indexed: 11/26/2022]
Abstract
The aim of this study was to compare the results of serological assays using pneumococcal proteins or polysaccharides for the detection of pneumococcal infection in childhood pneumonia. Serological assays measured IgG against eight pneumococcal proteins (Ply,CbpA,PspA1,PspA2,PcpA,PhtD,StkP-C,PcsB-N), C-polysaccharide [in the whole study population, n = 183], or 19 pneumococcal capsular polysaccharides (1,2,4,5,6B,7F,8,9 V,10A,11A,12F,14,15B,17F,18C,19F,20,23F,33F) [only in a subgroup of patients, n = 53] in paired serum samples of children aged <5 years-old hospitalized with clinical and radiological diagnosis of community-acquired pneumonia. We also performed an inhibition of binding test with the anti-capsular polysaccharide assay in order to confirm the specificity of the antibody responses detected. Invasive pneumococcal pneumonia was investigated by blood culture and PCR (ply-primer). Among 183 children, the anti-protein assay detected antibody response in 77/183(42.1%) patients and the anti-C-polysaccharide assay in 28/183(15.3%) patients. In a subgroup of 53 children, the anti-protein assay detected response in 32/53(60.4%) patients, the anti-C-polysaccharide assay in 11/53(20.8%) patients, and the anti-capsular polysaccharide in 25/53(47.2%) patients. Simultaneous antibody responses against ≥2 different capsular polysaccharides were detected in 11/53(20.8%) patients and this finding could not be explained by cross-reactivity between different serotypes. Among 13 patients with invasive pneumococcal pneumonia, the sensitivity of the anti-protein assay was 92.3%(12/13), of the anti-C-polysaccharide assay 30.8%(4/13), and of the anti-capsular polysaccharide assay 46.2%(6/13). The serological assay using pneumococcal proteins is more sensitive for the detection of pneumococcal infection in children with pneumonia than the assay using pneumococcal polysaccharides. Future studies on childhood pneumonia aetiology should consider applying serological assays using pneumococcal proteins.
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Affiliation(s)
- Igor C Borges
- Postgraduate Program in Health Sciences, Federal University of Bahia School of Medicine, Salvador, Brazil.
| | - Dafne C Andrade
- Postgraduate Program in Health Sciences, Federal University of Bahia School of Medicine, Salvador, Brazil
| | - Nina Ekström
- Department of Health Security, National Institute for Health and Welfare, Helsinki, Finland
| | - Camilla Virta
- Department of Health Security, National Institute for Health and Welfare, Helsinki, Finland
| | - Merit Melin
- Department of Health Security, National Institute for Health and Welfare, Helsinki, Finland
| | - Annika Saukkoriipi
- Department of Public Health Solutions, National Institute for Health and Welfare, Oulu, Finland
| | - Maija Leinonen
- Department of Public Health Solutions, National Institute for Health and Welfare, Oulu, Finland
| | - Olli Ruuskanen
- Department of Paediatrics and Adolescent Medicine, University of Turku and Turku University Hospital, Turku, Finland
| | - Helena Käyhty
- Department of Health Security, National Institute for Health and Welfare, Helsinki, Finland
| | - Cristiana M Nascimento-Carvalho
- Postgraduate Program in Health Sciences, Federal University of Bahia School of Medicine, Salvador, Brazil; Department of Paediatrics, Federal University of Bahia School of Medicine, Salvador, Brazil
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9
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Andrade DC, Borges IC, Bouzas ML, Oliveira JR, Käyhty H, Ruuskanen O, Nascimento-Carvalho C. Antibody responses against Streptococcus pneumoniae, Haemophilus influenzae and Moraxella catarrhalis in children with acute respiratory infection with or without nasopharyngeal bacterial carriage. Infect Dis (Lond) 2018; 50:705-713. [PMID: 29688138 DOI: 10.1080/23744235.2018.1463451] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND We studied Immunoglobulin G (IgG) antibody responses against Streptococcus pneumoniae, Haemophilus influenzae and Moraxella catarrhalis in young children with acute viral type respiratory infection and analyzed the findings in a multivariate model including age, nasopharyngeal carriage of the tested bacteria and pneumococcal vaccination. METHODS We included 227 children aged 6-23 months with acute respiratory infection. Nasopharyngeal aspirates were tested for bacterial carriage through detection of messenger RNA (mRNA) transcript with nCounter analysis. Acute and convalescent serum samples were tested for IgG antibody response against eight pneumococcal proteins, three proteins from H. influenzae and five proteins from M. catarrhalis in a fluorescent multiplex immunoassay. RESULTS A two-fold or greater increase in antibodies to S. pneumoniae, H. influenzae and M. catarrhalis was detected in 27.8, 9.7 and 14.1%, respectively. Nasopharyngeal carriage of each of the studied bacteria was not associated with antibody response detection against each respective bacterium. Furthermore, neither age nor pneumococcal vaccination were independently associated to detection of antibody response against the studied bacteria. Children who carried H. influenzae had higher frequency of colonization by M. catarrhalis (175 [80.3%] vs. 2 [22.2%]; p < .001) than those without H. influenzae. Also, children with acute otitis media tended to have higher frequency of antibody response to S. pneumoniae. CONCLUSION Nasopharyngeal colonization by S. pneumoniae, H. influenzae and M. catarrhalis did not induce significant increases in antibody levels to these bacteria. Carriage of pathogenic bacteria in the nasopharynx is not able to elicit antibody responses to protein antigens similar to those caused by symptomatic infections.
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Affiliation(s)
- Dafne C Andrade
- a Postgraduate Programme in Health Sciences , Federal University of Bahia School of Medicine , Salvador , Brazil
| | - Igor C Borges
- a Postgraduate Programme in Health Sciences , Federal University of Bahia School of Medicine , Salvador , Brazil
| | - Maiara L Bouzas
- a Postgraduate Programme in Health Sciences , Federal University of Bahia School of Medicine , Salvador , Brazil
| | - Juliana R Oliveira
- a Postgraduate Programme in Health Sciences , Federal University of Bahia School of Medicine , Salvador , Brazil
| | - Helena Käyhty
- b Department of Vaccinations and Immune Protection , National Institute for Health and Welfare , Helsinki , Finland
| | - Olli Ruuskanen
- c Department of Paediatrics , Turku University and University Hospital , Turku , Finland
| | - Cristiana Nascimento-Carvalho
- d Postgraduate Programme in Health Sciences, Department of Paediatrics , Federal University of Bahia School of Medicine , Salvador , Brazil
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10
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Andrade DC, Borges IC, Vilas-Boas AL, Fontoura MSH, Araújo-Neto CA, Andrade SC, Brim RV, Meinke A, Barral A, Ruuskanen O, Käyhty H, Nascimento-Carvalho CM. Infection by Streptococcus pneumoniae in children with or without radiologically confirmed pneumonia. J Pediatr (Rio J) 2018; 94:23-30. [PMID: 28668258 DOI: 10.1016/j.jped.2017.03.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2016] [Revised: 01/18/2017] [Accepted: 01/30/2017] [Indexed: 11/17/2022] Open
Abstract
OBJECTIVE Community-acquired pneumonia is an important cause of morbidity in childhood, but the detection of its causative agent remains a diagnostic challenge. The authors aimed to evaluate the role of the chest radiograph to identify cases of community-aquired pneumonia caused by typical bacteria. METHODS The frequency of infection by Streptococcus pneumoniae, Haemophilus influenzae, and Moraxella catarrhalis was compared in non-hospitalized children with clinical diagnosis of community acquired pneumonia aged 2-59 months with or without radiological confirmation (n=249 and 366, respectively). Infection by S. pneumoniae was diagnosed by the detection of a serological response against at least one of eight pneumococcal proteins (defined as an increase ≥2-fold in the IgG levels against Ply, CbpA, PspA1 and PspA2, PhtD, StkP-C, and PcsB-N, or an increase ≥1.5-fold against PcpA). Infection by H. influenzae and M. catarrhalis was defined as an increase ≥2-fold on the levels of microbe-specific IgG. RESULTS Children with radiologically confirmed pneumonia had higher rates of infection by S. pneumoniae. The presence of pneumococcal infection increased the odds of having radiologically confirmed pneumonia by 2.8 times (95% CI: 1.8-4.3). The negative predictive value of the normal chest radiograph for infection by S. pneumoniae was 86.3% (95% CI: 82.4-89.7%). There was no difference on the rates of infection by H. influenzae and M. catarrhalis between children with community-acquired pneumonia with and without radiological confirmation. CONCLUSIONS Among children with clinical diagnosis of community-acquired pneumonia submitted to chest radiograph, those with radiologically confirmed pneumonia present a higher rate of infection by S. pneumoniae when compared with those with a normal chest radiograph.
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Affiliation(s)
- Dafne C Andrade
- Universidade Federal da Bahia (UFBA), Faculdade de Medicina, Programa de Pós-Graduação em Ciências da Saúde, Salvador, BA, Brazil.
| | - Igor C Borges
- Universidade Federal da Bahia (UFBA), Faculdade de Medicina, Programa de Pós-Graduação em Ciências da Saúde, Salvador, BA, Brazil
| | - Ana Luísa Vilas-Boas
- Universidade Federal da Bahia (UFBA), Faculdade de Medicina, Programa de Pós-Graduação em Ciências da Saúde, Salvador, BA, Brazil
| | - Maria S H Fontoura
- Universidade Federal da Bahia (UFBA), Faculdade de Medicina, Departamento de Pediatria, Salvador, BA, Brazil
| | - César A Araújo-Neto
- Universidade Federal da Bahia (UFBA), Faculdade de Medicina, Departamento de Medicina Interna e Apoio Diagnóstico, Salvador, BA, Brazil
| | - Sandra C Andrade
- Universidade Federal da Bahia (UFBA), Complexo Hospitalar Professor Edgard Santos (HUPES), Salvador, BA, Brazil
| | - Rosa V Brim
- Universidade Federal da Bahia (UFBA), Faculdade de Medicina, Departamento de Medicina Interna e Apoio Diagnóstico, Salvador, BA, Brazil
| | - Andreas Meinke
- Valneva Austria GmbH, Campus Vienna Biocenter 3, Vienna, Austria
| | - Aldina Barral
- Universidade Federal da Bahia (UFBA), Faculdade de Medicina, Departamento de Patologia, Salvador, BA, Brazil; Centro de Pesquisa Gonçalo Moniz, Fundação Oswaldo Cruz (FIOCRUZ), Salvador, BA, Brazil
| | - Olli Ruuskanen
- Turku University and University Hospital, Department of Pediatrics, Turku, Finland
| | - Helena Käyhty
- National Institute for Health and Welfare, Helsinki, Finland
| | - Cristiana M Nascimento-Carvalho
- Universidade Federal da Bahia (UFBA), Faculdade de Medicina, Programa de Pós-Graduação em Ciências da Saúde, Salvador, BA, Brazil; Universidade Federal da Bahia (UFBA), Faculdade de Medicina, Departamento de Pediatria, Salvador, BA, Brazil
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11
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Infection by Streptococcus pneumoniae in children with or without radiologically confirmed pneumonia. JORNAL DE PEDIATRIA (VERSÃO EM PORTUGUÊS) 2018. [DOI: 10.1016/j.jpedp.2017.06.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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12
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Early detection of Mycobacterium avium subsp. paratuberculosis infection in cattle with multiplex-bead based immunoassays. PLoS One 2017; 12:e0189783. [PMID: 29261761 PMCID: PMC5736219 DOI: 10.1371/journal.pone.0189783] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Accepted: 12/01/2017] [Indexed: 01/12/2023] Open
Abstract
Johne’s Disease (JD), caused by Mycobacterium avium subspecies paratuberculosis (MAP), results in significant economic loss to livestock production. The early detection of MAP infection in animals with extant serological assays has remained challenging due to the low sensitivity of commercially available ELISA tests, a fact that has hampered the development of effective JD control programs. Our recent protein microarray-based studies identified several promising candidate antigens that are immunogenic during different stages of MAP infection. To evaluate these antigens for use in diagnostic assays and reliably identify animals with MAP infection, a multiplex (Luminex®) assay was developed using color-coded flourescent beads coupled to 6 MAP recombinant proteins and applied to screen 180 serum and 90 milk samples from cows at different stages of MAP infection including negative (NL), fecal test positive/ELISA negative (F+E-), and fecal positive/ELISA positive (F+E+). The results show that while serum antibody reactivities to each of the 6 antigens were highest in F+E+ group, antibody reactivity to three of the six antigens were identified in the F+E- group, suggesting that these three antigens are expressed and provoke antibody responses during the early infection stages with MAP. Further, antibodies against all six antigens were elevated in milk samples from both the F+E- and F+E+ groups in comparison to the NL group (p<0.01). Taken together, the results of our investigation suggest that multiplex bead-based assays are able to reliably identify MAP infection, even during early stages when antibody responses in animals are undetectable with widely used commercial ELISA tests.
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13
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Andrade DC, Borges IC, Ekström N, Jartti T, Puhakka T, Barral A, Kayhty H, Ruuskanen O, Nascimento-Carvalho CM. Determination of avidity of IgG against protein antigens from Streptococcus pneumoniae: assay development and preliminary application in clinical settings. Eur J Clin Microbiol Infect Dis 2017; 37:77-89. [PMID: 29027028 DOI: 10.1007/s10096-017-3103-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Accepted: 09/04/2017] [Indexed: 11/27/2022]
Abstract
The measurement of antibody levels is a common test for the diagnosis of Streptococcus pneumoniae infection in research. However, the quality of antibody response, reflected by avidity, has not been adequately evaluated. We aimed to evaluate the role of avidity of IgG against eight pneumococcal proteins in etiologic diagnosis. Eight pneumococcal proteins (Ply, CbpA, PspA1 and 2, PcpA, PhtD, StkP-C, and PcsB-N) were used to develop a multiplex bead-based avidity immunoassay. The assay was tested for effects of the chaotropic agent, multiplexing, and repeatability. The developed assay was applied to paired samples from children with or without pneumococcal disease (n = 38 for each group), determined by either serology, polymerase chain reaction (PCR), or blood culture. We found a good correlation between singleplex and multiplex assays, with r ≥ 0.94.The assay was reproducible, with mean inter-assay variation ≤ 9% and intra-assay variation < 6%. Children with pneumococcal disease had lower median avidity indexes in the acute phase of disease for PspA1 and 2 (p = 0.042), PcpA (p = 0.002), PhtD (p = 0.014), and StkP-C (p < 0.001). When the use of IgG avidity as a diagnostic tool for pneumococcal infection was evaluated, the highest discriminative power was found for StkP-C, followed by PcpA (area under the curve [95% confidence interval, CI]: 0.868 [0.759-0.977] and 0.743 [0.607-879], respectively). The developed assay was robust and had no deleterious influence from multiplexing. Children with pneumococcal disease had lower median avidity against five pneumococcal proteins in the acute phase of disease compared to children without disease.
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Affiliation(s)
- D C Andrade
- Postgraduate Programme in Health Sciences, Federal University of Bahia School of Medicine, Salvador, Bahia, Brazil.
| | - I C Borges
- Postgraduate Programme in Health Sciences, Federal University of Bahia School of Medicine, Salvador, Bahia, Brazil
| | - N Ekström
- National Institute for Health and Welfare, Helsinki, Finland
| | - T Jartti
- Department of Paediatrics, University of Turku and Turku University Hospital, Turku, Finland
| | - T Puhakka
- Department of Otorhinolaryngology, University of Turku and Turku University Hospital, Turku, Finland
- Department of Otorhinolaryngology, Satakunta Central Hospital, Pori, Finland
| | - A Barral
- Pathology Department and Postgraduate Programme in Health Sciences, Federal University of Bahia School of Medicine and Centro de Pesquisa Gonçalo Muniz, Fundação Oswaldo Cruz, Salvador, Bahia, Brazil
| | - H Kayhty
- National Institute for Health and Welfare, Helsinki, Finland
| | - O Ruuskanen
- Department of Paediatrics, University of Turku and Turku University Hospital, Turku, Finland
| | - C M Nascimento-Carvalho
- Department of Pediatrics and Postgraduate Programme in Health Sciences, Federal University of Bahia School of Medicine, Salvador, Bahia, Brazil
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14
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Ortega GA, Pérez-Rodríguez S, Reguera E. Magnetic paper – based ELISA for IgM-dengue detection. RSC Adv 2017. [DOI: 10.1039/c6ra25992h] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
“Magnetic Paper – Based ELISA” for IgM-dengue antibodies detection provide a system with improved analytical response.
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Affiliation(s)
- G. A. Ortega
- Center for Applied Science and Advanced Technology of IPN
- Legaria Unit
- Mexico City
- Mexico
- University of Havana
| | - S. Pérez-Rodríguez
- National Autonomous University of Mexico
- Biomedical Research Institute
- Mexico City
- Mexico
| | - E. Reguera
- Center for Applied Science and Advanced Technology of IPN
- Legaria Unit
- Mexico City
- Mexico
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Natural Development of Antibodies against Streptococcus pneumoniae, Haemophilus influenzae, and Moraxella catarrhalis Protein Antigens during the First 13 Years of Life. CLINICAL AND VACCINE IMMUNOLOGY : CVI 2016; 23:878-883. [PMID: 27581439 DOI: 10.1128/cvi.00341-16] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Accepted: 08/26/2016] [Indexed: 12/27/2022]
Abstract
Conserved protein antigens have been investigated as vaccine candidates against respiratory pathogens. We evaluated the natural development of antibodies against Streptococcus pneumoniae, Haemophilus influenzae, and Moraxella catarrhalis proteins during childhood. Serum samples were collected from 50 healthy children from their first months to age 13 years (median sampling interval, 6 months). We also analyzed serum samples from 24 adults. Serum IgG antibodies against eight pneumococcal proteins (Ply, CbpA, PspA 1 and 2, PcpA, PhtD, StkP-C, and PcsB-N), three H. influenzae proteins, and five M. catarrhalis proteins were measured using a multiplexed bead-based immunoassay. Antibody levels were analyzed using multilevel mixed-effects regression and Spearman's correlation. Antibody levels against pneumococcal proteins peaked at 3 to 5 years of age and then reached a plateau. Antibody levels against H. influenzae proteins peaked during the second year and then stabilized. Antibody levels against M. catarrhalis proteins peaked during the first year and then slowly decreased. Peak antibody levels during childhood were higher than those of adults. Correlations among pneumococcal antibody levels were highest among anti-CbpA, anti-PcpA, and anti-PhtD antibodies (r = 0.71 to 0.75; P < 0.001). The children presented 854 symptomatic respiratory infections on 586 occasions. Symptomatic respiratory infections did not improve prediction of antibody levels in the regression model. The maturation of immune responses against the investigated pneumococcal proteins shares similarities, especially among CbpA, PcpA, and PhtD. Antibody production against H. influenzae and M. catarrhalis proteins starts early in life and reaches peak levels earlier than antibody production against the pneumococcal proteins. Basal antibody levels are not related to the occurrence of symptomatic respiratory infections.
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16
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Borges IC, Andrade DC, Cardoso MRA, Meinke A, Barral A, Käyhty H, Ruuskanen O, Nascimento-Carvalho CM. Seasonal patterns and association of meteorological factors with infection caused by Streptococcus pneumoniae, Haemophilus influenzae, and Moraxella catarrhalis in childhood community-acquired pneumonia in a tropical region. Infect Dis (Lond) 2016; 49:147-150. [PMID: 27464260 DOI: 10.1080/23744235.2016.1212170] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Affiliation(s)
- Igor C Borges
- a Postgraduate Program in Health Sciences, Federal University of Bahia School of Medicine , Salvador , Brazil
| | - Dafne C Andrade
- b Postgraduate Program in Health Sciences, Federal University of Bahia School of Medicine , Salvador , Brazil
| | - Maria-Regina A Cardoso
- c Department of Epidemiology , University of São Paulo School of Public Health , São Paulo , Brazil
| | - Andreas Meinke
- d Valneva Austria GmbH, Campus Vienna Biocenter 3 , Vienna , Austria
| | - Aldina Barral
- e Postgraduate Program in Health Sciences, Federal University of Bahia School of Medicine , Salvador , Brazil.,f Department of Pathology , Federal University of Bahia School of Medicine and Centro de Pesquisas Gonçalo Moniz, Fundação Oswaldo Cruz , Salvador , Brazil
| | - Helena Käyhty
- g National Institute for Health and Welfare , Helsinki , Finland
| | - Olli Ruuskanen
- h Department of Paediatrics , Turku University and University Hospital , Turku , Finland
| | - Cristiana M Nascimento-Carvalho
- i Postgraduate Program in Health Sciences, Federal University of Bahia School of Medicine , Salvador , Brazil.,j Department of Paediatrics , Federal University of Bahia School of Medicine , Salvador , Brazil
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Effect of Pneumococcal Conjugate Vaccine on the Natural Antibodies and Antibody Responses Against Protein Antigens From Streptococcus pneumoniae, Haemophilus influenzae and Moraxella catarrhalis in Children With Community-acquired Pneumonia. Pediatr Infect Dis J 2016; 35:683-9. [PMID: 26954601 DOI: 10.1097/inf.0000000000001126] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Streptococcus pneumoniae, Haemophilus influenzae and Moraxella catarrhalis are common causative agents of respiratory infections. Pneumococcal conjugate vaccines have been introduced recently, but their effect on the natural immunity against protein antigens from these pathogens has not been elucidated. METHODS This was an age-matched observational controlled study that evaluated the influence of 10-valent pneumococcal conjugate vaccines on the levels of antibodies and frequencies of antibody responses against proteins from S. pneumoniae, H. influenzae and M. catarrhalis in serum samples of children with community-acquired pneumonia. Eight pneumococcal proteins (pneumolysin, choline-binding protein A, pneumococcal surface protein A families 1 and 2, pneumococcal choline-binding protein A, pneumococcal histidine triad protein D, serine/threonine protein kinase, protein required for cell wall separation of group B streptococcus), 3 proteins from H. influenzae (including protein D) and 5 M. catarrhalis proteins were investigated. RESULTS The study group comprised 38 vaccinated children and 114 age-matched controls (median age: 14.5 vs. 14.6 months, respectively; P = 0.997), all with community-acquired pneumonia. There was no difference on clinical baseline characteristics between vaccinated and unvaccinated children. Vaccinated children had significantly lower levels of antibodies against 4 of the studied pneumococcal antigens (P = 0.048 for Ply, P = 0.018 for pneumococcal surface protein A, P = 0.001 for StkP and P = 0.028 for PcsB) and higher levels of antibodies against M. catarrhalis (P = 0.015). Nevertheless, the vaccination status did not significantly affect the rates of antibody responses against S. pneumoniae, H. influenzae and M. catarrhalis. CONCLUSIONS In spite of the differences that have been found on the level of natural antibodies, no effect from pneumococcal vaccination was observed on the rate of immune responses associated with community-acquired pneumonia against protein antigens from S. pneumoniae, H. influenzae and M. catarrhalis.
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Andrade DC, Borges IC, Ivaska L, Peltola V, Meinke A, Barral A, Käyhty H, Ruuskanen O, Nascimento-Carvalho CM. Serological diagnosis of pneumococcal infection in children with pneumonia using protein antigens: A study of cut-offs with positive and negative controls. J Immunol Methods 2016; 433:31-7. [PMID: 26928648 DOI: 10.1016/j.jim.2016.02.021] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Revised: 02/25/2016] [Accepted: 02/25/2016] [Indexed: 11/28/2022]
Abstract
The etiological diagnosis of infection by Streptococcus pneumoniae in children is difficult, and the use of indirect techniques is frequently warranted. We aimed to study the use of pneumococcal proteins for the serological diagnosis of pneumococcal infection in children with pneumonia. We analyzed paired serum samples from 13 Brazilian children with invasive pneumococcal pneumonia (positive control group) and 23 Finnish children with viral pharyngitis (negative control group), all aged <5years-old. Children with pharyngitis were evaluated for oropharyngeal colonization, and none of them carried S. pneumoniae. We used a multiplex bead-based assay with eight proteins: Ply, CbpA, PspA1 and 2, PcpA, PhtD, StkP and PcsB. The optimal cut-off for increase in antibody level for the diagnosis of pneumococcal infection was determined for each antigen by ROC curve analysis. The positive control group had a significantly higher rate of ≥2-fold rise in antibody levels against all pneumococcal proteins, except Ply, compared to the negative controls. The cut-off of ≥2-fold increase in antibody levels was accurate for pneumococcal infection diagnosis for all investigated antigens. However, there was a substantial increase in the accuracy of the test with a cut-off of ≥1.52-fold rise in antibody levels for PcpA. When using the investigated protein antigens for the diagnosis of pneumococcal infection, the detection of response against at least one antigen was highly sensitive (92.31%) and specific (91.30%). The use of serology with pneumococcal proteins is a promising method for the diagnosis of pneumococcal infection in children with pneumonia. The use of a ≥2-fold increase cut-off is adequate for most pneumococcal proteins.
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Affiliation(s)
- Dafne Carvalho Andrade
- Postgraduate Programme in Health Sciences, Federal University of Bahia School of Medicine, Salvador, Bahia, Brazil.
| | - Igor Carmo Borges
- Postgraduate Programme in Health Sciences, Federal University of Bahia School of Medicine, Salvador, Bahia, Brazil
| | - Lauri Ivaska
- Department of Pediatrics and Adolescent Medicine, Turku University Hospital and University of Turku, Turku, Finland
| | - Ville Peltola
- Department of Pediatrics and Adolescent Medicine, Turku University Hospital and University of Turku, Turku, Finland
| | - Andreas Meinke
- Valneva Austria GmbH, Campus Vienna Biocenter 3, Vienna, Austria
| | - Aldina Barral
- Postgraduate Programme in Health Sciences, Federal University of Bahia School of Medicine, Salvador, Bahia, Brazil; Department of Pathology, Federal University of Bahia School of Medicine and Centro de Pesquisa Gonçalo Moniz, Fundação Oswaldo Cruz (FIOCRUZ), Salvador, Bahia, Brazil
| | - Helena Käyhty
- National Institute for Health and Welfare, Helsinki, Finland
| | - Olli Ruuskanen
- Department of Pediatrics and Adolescent Medicine, Turku University Hospital and University of Turku, Turku, Finland
| | - Cristiana Maria Nascimento-Carvalho
- Postgraduate Programme in Health Sciences, Federal University of Bahia School of Medicine, Salvador, Bahia, Brazil; Department of Pediatrics, Federal University of Bahia School of Medicine, Salvador, Bahia, Brazil
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Salieb-Beugelaar GB, Zhang B, Nigo MM, Frischmann S, Hunziker PR. Improving diagnosis of pneumococcal disease by multiparameter testing and micro/nanotechnologies. EUROPEAN JOURNAL OF NANOMEDICINE 2016. [DOI: 10.1515/ejnm-2016-0012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
AbstractThe diagnosis and management of pneumococcal disease remains challenging, in particular in children who often are asymptomatic carriers, and in low-income countries with a high morbidity and mortality from febrile illnesses where the broad range of bacterial, viral and parasitic cases are in contrast to limited, diagnostic resources. Integration of multiple markers into a single, rapid test is desirable in such situations. Likewise, the development of multiparameter tests for relevant arrays of pathogens is important to avoid overtreatment of febrile syndromes with antibiotics. Miniaturization of tests through use of micro- and nanotechnologies combines several advantages: miniaturization reduces sample requirements, reduces the use of consumables and reagents leading to a reduction in costs, facilitates parallelization, enables point-of-care use of diagnostic equipment and even reduces the amount of potentially infectious disposables, characteristics that are highly desirable in most healthcare settings. This critical review emphasizes our vision on the importance of multiparametric testing for diagnosing pneumococcal infections in patients with fever and examines recent relevant developments in micro/nanotechnologies to achieve this goal.
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Ortega GA, Zuaznabar-Gardona JC, Morales-Tarré O, Reguera E. Immobilization of dengue specific IgM antibodies on magnetite nanoparticles by using facile conjugation strategies. RSC Adv 2016. [DOI: 10.1039/c6ra23260d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Five strategies to conjugate IgM antibodies on magnetite nanoparticles were evaluated and the most effective used for IgM-dengue detection.
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Affiliation(s)
- G. A. Ortega
- Center for Applied Science and Advanced Technology of IPN
- Mexico City
- Mexico
- University of Havana
- Faculty of Chemistry
| | | | - O. Morales-Tarré
- Center of Molecular Immunology
- INIM
- Process Development Direction
- Havana
- Cuba
| | - E. Reguera
- Center for Applied Science and Advanced Technology of IPN
- Mexico City
- Mexico
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21
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Jiménez-Munguía I, van Wamel WJB, Olaya-Abril A, García-Cabrera E, Rodríguez-Ortega MJ, Obando I. Proteomics-driven design of a multiplex bead-based platform to assess natural IgG antibodies to pneumococcal protein antigens in children. J Proteomics 2015; 126:228-33. [PMID: 26122914 DOI: 10.1016/j.jprot.2015.06.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Revised: 06/06/2015] [Accepted: 06/20/2015] [Indexed: 10/23/2022]
Abstract
Pneumococcal surface proteins are potential candidates for the development of protein-based vaccines and serological assays. The objective of the study was to develop a multiple bead-based immunoassay using Luminex xMAP® technology for the quantitation of natural antibodies against Streptococcus pneumoniae proteins and the characterization of the acute serum response following pneumococcal pneumonia in children. Sixty-four recombinantly produced pneumococcal proteins, which were selected based on their proteomic experimental identification by "shaving" live cells with trypsin followed by LC/MS/MS analysis, were coupled to fluorescent SeroMAP® beads and anti-pneumococcal specific IgG levels were determined in sera. Multiplex assay was validated through comparison of IgG levels to 14 randomly chosen pneumococcal antigens by using multiplex and singleplex assays. Acute serum IgG levels against RrgB were significantly lower in children ≤ 4 years old with pneumococcal pneumonia than those in controls. In addition, there was a small trend toward slightly lower antibody levels for PrsA, RrgC and RrgB in pneumonia patients of the all age group.
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Affiliation(s)
- Irene Jiménez-Munguía
- Departamento de Bioquímica y Biología Molecular, Universidad de Córdoba, Campus de Excelencia Internacional CeiA3, Córdoba, Spain; Red Española de Investigación en Patología Infecciosa (REIPI), Instituto de Salud Carlos III, Madrid, Spain
| | - Willem J B van Wamel
- Department of Medical Microbiology and Infectious Diseases, Erasmus Medical Centre, Rotterdam, The Netherlands
| | - Alfonso Olaya-Abril
- Departamento de Bioquímica y Biología Molecular, Universidad de Córdoba, Campus de Excelencia Internacional CeiA3, Córdoba, Spain; Red Española de Investigación en Patología Infecciosa (REIPI), Instituto de Salud Carlos III, Madrid, Spain
| | | | - Manuel J Rodríguez-Ortega
- Departamento de Bioquímica y Biología Molecular, Universidad de Córdoba, Campus de Excelencia Internacional CeiA3, Córdoba, Spain; Red Española de Investigación en Patología Infecciosa (REIPI), Instituto de Salud Carlos III, Madrid, Spain
| | - Ignacio Obando
- Sección de Enfermedades Infecciosas Pediátricas e Inmunopatología, Hospital Universitario Infantil Virgen del Rocío, Sevilla, Spain.
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22
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Borges IC, Andrade DC, Vilas-Boas AL, Fontoura MSH, Laitinen H, Ekström N, Adrian PV, Meinke A, Cardoso MRA, Barral A, Ruuskanen O, Käyhty H, Nascimento-Carvalho CM. Detection of antibody responses against Streptococcus pneumoniae, Haemophilus influenzae, and Moraxella catarrhalis proteins in children with community-acquired pneumonia: effects of combining pneumococcal antigens, pre-existing antibody levels, sampling interval, age, and duration of illness. Eur J Clin Microbiol Infect Dis 2015; 34:1551-7. [DOI: 10.1007/s10096-015-2385-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2015] [Accepted: 03/31/2015] [Indexed: 10/23/2022]
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Rodrigues JP, Andrade HF. Efficient duplex solid-phase fluorescent assay (dFISA) for the simultaneous detection of specific anti-T. gondii IgG and IgM due to refined conjugates. J Immunol Methods 2015; 420:11-7. [PMID: 25796562 DOI: 10.1016/j.jim.2015.03.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Revised: 02/04/2015] [Accepted: 03/11/2015] [Indexed: 11/28/2022]
Abstract
Toxoplasma gondii infections are very common, causing occasional central nervous system and eye diseases, and must be screened in prenatal care for efficient therapy. Here, we developed a duplex solid-phase fluorescent assay (dFISA) for the simultaneous detection of anti-T. gondii IgG and IgM antibodies in prenatal care screening for toxoplasmosis. Assays using commercially available ion-exchange purified conjugates yielded poor results and high background fluorescence. Same-well IgG/IgM dFISA with refined conjugates was used to test 140 samples from university students, 120 samples from pregnant women and 24 samples from adult volunteers at a large public hospital. We found that dFISA offers high concordance, specificity and reproducibility for IgG (Kappa=0.883) and IgM (Kappa=0.918), which is useful in high-throughput applications for antenatal care.
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Affiliation(s)
- J P Rodrigues
- Instituto de Medicina Tropical de São Paulo, Universidade de São Paulo, Brazil; Instituto dos Laboratórios de Investigação Medica, HCFMUSP, Brazil; Laboratório de Protozoologia, Instituto de Medicina Tropical de São Paulo, Av. Dr. E. C. Aguiar, 470, 05403-000 São Paulo, SP Brazil
| | - H F Andrade
- Instituto de Medicina Tropical de São Paulo, Universidade de São Paulo, Brazil; Instituto dos Laboratórios de Investigação Medica, HCFMUSP, Brazil; Laboratório de Protozoologia, Instituto de Medicina Tropical de São Paulo, Av. Dr. E. C. Aguiar, 470, 05403-000 São Paulo, SP Brazil.
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