1
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Wang L, Candia J, Ma L, Zhao Y, Imberti L, Sottini A, Quiros-Roldan E, Dobbs K, Burbelo PD, Cohen JI, Delmonte OM, Forgues M, Liu H, Matthews HF, Shaw E, Stack MA, Weber SE, Zhang Y, Lisco A, Sereti I, Su HC, Notarangelo LD, Wang XW. Serological responses to human virome define clinical outcomes of Italian patients infected with SARS-CoV-2. Int J Biol Sci 2022; 18:5591-5606. [PMID: 36263161 PMCID: PMC9576512 DOI: 10.7150/ijbs.78002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2022] [Accepted: 08/14/2022] [Indexed: 01/12/2023] Open
Abstract
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is responsible for the pandemic respiratory infectious disease COVID-19. However, clinical manifestations and outcomes differ significantly among COVID-19 patients, ranging from asymptomatic to extremely severe, and it remains unclear what drives these disparities. Here, we studied 159 sequentially enrolled hospitalized patients with COVID-19-associated pneumonia from Brescia, Italy using the VirScan phage-display method to characterize circulating antibodies binding to 96,179 viral peptides encoded by 1,276 strains of human viruses. SARS-CoV-2 infection was associated with a marked increase in immune antibody repertoires against many known pathogenic and non-pathogenic human viruses. This antiviral antibody response was linked to longitudinal trajectories of disease severity and was further confirmed in additional 125 COVID-19 patients from the same geographical region in Northern Italy. By applying a machine-learning-based strategy, a viral exposure signature predictive of COVID-19-related disease severity linked to patient survival was developed and validated. These results provide a basis for understanding the role of memory B-cell repertoire to viral epitopes in COVID-19-related symptoms and suggest that a unique anti-viral antibody repertoire signature may be useful to define COVID-19 clinical severity.
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Affiliation(s)
- Limin Wang
- Laboratory of Human Carcinogenesis, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, Maryland 20892,These authors contributed equally
| | - Julián Candia
- Laboratory of Human Carcinogenesis, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, Maryland 20892,These authors contributed equally
| | - Lichun Ma
- Laboratory of Human Carcinogenesis, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, Maryland 20892,These authors contributed equally
| | - Yongmei Zhao
- CCR-SF Bioinformatics Group, Advanced Biomedical and Computational Sciences, Frederick National Laboratory for Cancer Research, 8560 Progress Drive, Frederick, Maryland 21701,These authors contributed equally
| | - Luisa Imberti
- CREA Laboratory, Diagnostic Department, ASST Spedali Civili di Brescia, Brescia, Italy
| | - Alessandra Sottini
- CREA Laboratory, Diagnostic Department, ASST Spedali Civili di Brescia, Brescia, Italy
| | - Eugenia Quiros-Roldan
- Department of Infectious and Tropical Diseases, University of Brescia and ASST Spedali Civili, Brescia, Italy
| | - Kerry Dobbs
- Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, Maryland 20892
| | - Peter D. Burbelo
- National Institute of Dental and Craniofacial Research, NIH, Bethesda, Maryland 20892
| | - Jeffrey I. Cohen
- Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, Maryland 20892
| | - Ottavia M. Delmonte
- Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, Maryland 20892
| | - Marshonna Forgues
- Laboratory of Human Carcinogenesis, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, Maryland 20892
| | - Hui Liu
- Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, Maryland 20892
| | - Helen F. Matthews
- Laboratory of Immunology, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, Maryland 20892
| | - Elana Shaw
- Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, Maryland 20892
| | - Michael A. Stack
- Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, Maryland 20892
| | - Sarah E. Weber
- Section of Molecular Development of the Immune System, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, Maryland 20892
| | - Yu Zhang
- Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, Maryland 20892
| | - Andrea Lisco
- Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, Maryland 20892
| | - Irini Sereti
- Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, Maryland 20892
| | - Helen C. Su
- Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, Maryland 20892
| | - Luigi D. Notarangelo
- Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, Maryland 20892,✉ Corresponding author: ; . Lead contact: Xin Wei Wang, Laboratory of Human Carcinogenesis, Center for Cancer Research, National Cancer Institute, 37 Convent Drive, Building 37, Room 3044A, Bethesda, MD 20892; 240-760-6858;
| | - Xin Wei Wang
- Laboratory of Human Carcinogenesis, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, Maryland 20892,Liver Cancer Program, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, Maryland 20892,Lead Contact,✉ Corresponding author: ; . Lead contact: Xin Wei Wang, Laboratory of Human Carcinogenesis, Center for Cancer Research, National Cancer Institute, 37 Convent Drive, Building 37, Room 3044A, Bethesda, MD 20892; 240-760-6858;
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2
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Carmona-Rivera C, Zhang Y, Dobbs K, Markowitz TE, Dalgard CL, Oler AJ, Claybaugh DR, Draper D, Truong M, Delmonte OM, Licciardi F, Ramenghi U, Crescenzio N, Imberti L, Sottini A, Quaresima V, Fiorini C, Discepolo V, Lo Vecchio A, Guarino A, Pierri L, Catzola A, Biondi A, Bonfanti P, Poli Harlowe MC, Espinosa Y, Astudillo C, Rey-Jurado E, Vial C, de la Cruz J, Gonzalez R, Pinera C, Mays JW, Ng A, Platt A, Drolet B, Moon J, Cowen EW, Kenney H, Weber SE, Castagnoli R, Magliocco M, Stack MA, Montealegre G, Barron K, Fink DL, Kuhns DB, Hewitt SM, Arkin LM, Chertow DS, Su HC, Notarangelo LD, Kaplan MJ. Multicenter analysis of neutrophil extracellular trap dysregulation in adult and pediatric COVID-19. JCI Insight 2022; 7:160332. [PMID: 35852866 PMCID: PMC9534551 DOI: 10.1172/jci.insight.160332] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [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: 03/21/2022] [Accepted: 07/14/2022] [Indexed: 12/02/2022] Open
Abstract
Dysregulation in neutrophil extracellular trap (NET) formation and degradation may play a role in the pathogenesis and severity of COVID-19; however, its role in the pediatric manifestations of this disease, including multisystem inflammatory syndrome in children (MIS-C) and chilblain-like lesions (CLLs), otherwise known as “COVID toes,” remains unclear. Studying multinational cohorts, we found that, in CLLs, NETs were significantly increased in serum and skin. There was geographic variability in the prevalence of increased NETs in MIS-C, in association with disease severity. MIS-C and CLL serum samples displayed decreased NET degradation ability, in association with C1q and G-actin or anti-NET antibodies, respectively, but not with genetic variants of DNases. In adult COVID-19, persistent elevations in NETs after disease diagnosis were detected but did not occur in asymptomatic infection. COVID-19–affected adults displayed significant prevalence of impaired NET degradation, in association with anti-DNase1L3, G-actin, and specific disease manifestations, but not with genetic variants of DNases. NETs were detected in many organs of adult patients who died from COVID-19 complications. Infection with the Omicron variant was associated with decreased NET levels when compared with other SARS-CoV-2 strains. These data support a role for NETs in the pathogenesis and severity of COVID-19 in pediatric and adult patients.
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Affiliation(s)
- Carmelo Carmona-Rivera
- Systemic Autoimmunity Branch, National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS)
| | - Yu Zhang
- Human Immunological Diseases Section, Laboratory of Clinical Immunology and Microbiology (LCIM), National Institute of Allergy and Infectious Diseases (NIAID); and
| | | | | | - Clifton L. Dalgard
- Department of Anatomy, Physiology & Genetics, School of Medicine, and the American Genome Center, Uniformed Services University of the Health Sciences (USUHS), Bethesda, Maryland, USA
| | - Andrew J. Oler
- Bioinformatics and Computational Biosciences Branch, Office of Cyber Infrastructure and Computational Biology, NIAID, NIH, Bethesda, Maryland, USA
| | - Dillon R. Claybaugh
- Systemic Autoimmunity Branch, National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS)
| | | | | | | | | | - Ugo Ramenghi
- Department of Public Health and Pediatric Sciences and
| | - Nicoletta Crescenzio
- Pediatric Hematology, “Regina Margherita” Children Hospital, University of Turin, Turin, Italy
| | - Luisa Imberti
- Centro di Ricerca Emato-oncologica AIL, Diagnostic Department, ASST Spedali Civili di Brescia, Brescia, Italy
| | - Alessandra Sottini
- Centro di Ricerca Emato-oncologica AIL, Diagnostic Department, ASST Spedali Civili di Brescia, Brescia, Italy
| | - Virginia Quaresima
- Centro di Ricerca Emato-oncologica AIL, Diagnostic Department, ASST Spedali Civili di Brescia, Brescia, Italy
| | - Chiara Fiorini
- Centro di Ricerca Emato-oncologica AIL, Diagnostic Department, ASST Spedali Civili di Brescia, Brescia, Italy
| | - Valentina Discepolo
- Department of Translational Medical Sciences, Pediatric Section, University of Naples Federico II, Naples, Italy
| | - Andrea Lo Vecchio
- Department of Translational Medical Sciences, Pediatric Section, University of Naples Federico II, Naples, Italy
| | - Alfredo Guarino
- Department of Translational Medical Sciences, Pediatric Section, University of Naples Federico II, Naples, Italy
| | - Luca Pierri
- Department of Translational Medical Sciences, Pediatric Section, University of Naples Federico II, Naples, Italy
| | - Andrea Catzola
- Department of Translational Medical Sciences, Pediatric Section, University of Naples Federico II, Naples, Italy
| | - Andrea Biondi
- Department of Pediatrics, University of Milano-Bicocca, European Reference Network (ERN) PaedCan, EuroBloodNet, MetabERN, Fondazione MBBM/Ospedale San Gerardo, Monza, Italy
| | - Paolo Bonfanti
- Department of Infectious Diseases, San Gerardo Hospital–University of Milano-Bicocca, Monza, Italy
| | - Maria C. Poli Harlowe
- Programa de Inmunogenética e Inmunología Traslacional, Instituto de Ciencias e Innovación en Medicina, Facultad de Medicina Clínica Alemana, Universidad del Desarrollo, Santiago, Chile
- Hospital Roberto del Rio, Santiago, Chile
| | | | | | - Emma Rey-Jurado
- Programa de Inmunogenética e Inmunología Traslacional, Instituto de Ciencias e Innovación en Medicina, Facultad de Medicina Clínica Alemana, Universidad del Desarrollo, Santiago, Chile
| | - Cecilia Vial
- Facultad de Medicina Clínica Alemana Universidad del Desarrollo, Programa Hantavirus, Instituto de Ciencias e Innovación en Medicina, Santiago, Chile
| | - Javiera de la Cruz
- Programa de Inmunogenética e Inmunología Traslacional, Instituto de Ciencias e Innovación en Medicina, Facultad de Medicina Clínica Alemana, Universidad del Desarrollo, Santiago, Chile
| | - Ricardo Gonzalez
- Pediatric Intensive Care Unit, Hospital Exequiel Gonzalez Cortés, Santiago, Chile
| | - Cecilia Pinera
- Infectious Diseases Unit, Hospital Dr. Exequiel González Cortés, Región Metropolitana, Chile
- Faculty of Medicine, Universidad de Chile, Santiago, Chile
| | - Jacqueline W. Mays
- National Institute of Dental and Craniofacial Research (NIDCR), NIH, Bethesda, Maryland, USA
| | - Ashley Ng
- Department of Dermatology, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA
| | - Andrew Platt
- Emerging Pathogens Section, Critical Care Medicine Department, Clinical Center, and Laboratory of Immunoregulation, NIAID, NIH, Bethesda, Maryland, USA
| | | | | | - Beth Drolet
- Department of Dermatology, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA
| | - John Moon
- Department of Dermatology, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA
| | | | | | | | | | - Mary Magliocco
- Molecular Development of the Immune System Section, Laboratory of Immune System Biology, NIAID; and
| | - Michael A. Stack
- Molecular Development of the Immune System Section, Laboratory of Immune System Biology, NIAID; and
| | - Gina Montealegre
- Division of Clinical Research, NIAID, NIH, Bethesda, Maryland, USA
| | - Karyl Barron
- Division of Clinical Research, NIAID, NIH, Bethesda, Maryland, USA
| | - Danielle L. Fink
- Applied/Developmental Research Directorate, Frederick and National Laboratory for Cancer Research, National Cancer Institute (NCI), NIH, Frederick, Maryland, USA
| | - Douglas B. Kuhns
- Applied/Developmental Research Directorate, Frederick and National Laboratory for Cancer Research, National Cancer Institute (NCI), NIH, Frederick, Maryland, USA
| | - Stephen M. Hewitt
- Laboratory of Pathology, Center for Cancer Research, NCI, NIH, Bethesda, Maryland, USA
| | - Lisa M. Arkin
- Department of Dermatology, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA
| | - Daniel S. Chertow
- Emerging Pathogens Section, Critical Care Medicine Department, Clinical Center, and Laboratory of Immunoregulation, NIAID, NIH, Bethesda, Maryland, USA
| | - Helen C. Su
- Human Immunological Diseases Section, Laboratory of Clinical Immunology and Microbiology (LCIM), National Institute of Allergy and Infectious Diseases (NIAID); and
| | | | - Mariana J. Kaplan
- Systemic Autoimmunity Branch, National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS)
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3
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Masvekar RR, Kosa P, Jin K, Dobbs K, Stack MA, Castagnoli R, Quaresima V, Su HC, Imberti L, Notarangelo LD, Bielekova B. Prognostic value of serum/plasma neurofilament light chain for COVID-19-associated mortality. Ann Clin Transl Neurol 2022; 9:622-632. [PMID: 35313387 PMCID: PMC9082006 DOI: 10.1002/acn3.51542] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [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: 01/19/2022] [Revised: 02/22/2022] [Accepted: 02/25/2022] [Indexed: 01/07/2023] Open
Abstract
OBJECTIVE Given the continued spread of coronavirus 2, the early predictors of coronavirus disease 19 (COVID-19) associated mortality might improve patients' outcomes. Increased levels of circulating neurofilament light chain (NfL), a biomarker of neuronal injury, have been observed in severe COVID-19 patients. We investigated whether NfL provides non-redundant clinical value to previously identified predictors of COVID-19 mortality. METHODS We measured serum or plasma NfL concentrations in a blinded fashion in 3 cohorts totaling 338 COVID-19 patients. RESULTS In cohort 1, we found significantly elevated NfL levels only in critically ill COVID-19 patients. Longitudinal cohort 2 data showed that NfL is elevated late in the course of the disease, following the two other prognostic markers of COVID-19: decrease in absolute lymphocyte count (ALC) and increase in lactate dehydrogenase (LDH). Significant correlations between ALC and LDH abnormalities and subsequent rise of NfL implicate that the multi-organ failure is the most likely cause of neuronal injury in severe COVID-19 patients. The addition of NfL to age and gender in cohort 1 significantly improved the accuracy of mortality prediction and these improvements were validated in cohorts 2 and 3. INTERPRETATION A substantial increase in serum/plasma NfL reproducibly enhanced COVID-19 mortality prediction. Combined with other prognostic markers, such as ALC and LDH that are routinely measured in ICU patients, NfL measurements might be useful to identify the patients at a high risk of COVID-19-associated mortality, who might still benefit from escalated care.
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Affiliation(s)
- Ruturaj R. Masvekar
- National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH)BethesdaMarylandUSA
| | - Peter Kosa
- National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH)BethesdaMarylandUSA
| | - Kimberly Jin
- National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH)BethesdaMarylandUSA
| | - Kerry Dobbs
- National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH)BethesdaMarylandUSA
| | - Michael A. Stack
- National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH)BethesdaMarylandUSA
| | - Riccardo Castagnoli
- National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH)BethesdaMarylandUSA
| | - Virginia Quaresima
- CREA Laboratory (AIL Center for Hemato‐Oncologic Research), Diagnostic DepartmentASST Spedali Civili di BresciaBresciaItaly
| | - Helen C. Su
- National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH)BethesdaMarylandUSA
| | - Luisa Imberti
- CREA Laboratory (AIL Center for Hemato‐Oncologic Research), Diagnostic DepartmentASST Spedali Civili di BresciaBresciaItaly
| | - Luigi D. Notarangelo
- National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH)BethesdaMarylandUSA
| | - Bibiana Bielekova
- National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH)BethesdaMarylandUSA
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4
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Sacco K, Castagnoli R, Vakkilainen S, Liu C, Delmonte OM, Oguz C, Kaplan IM, Alehashemi S, Burbelo PD, Bhuyan F, de Jesus AA, Dobbs K, Rosen LB, Cheng A, Shaw E, Vakkilainen MS, Pala F, Lack J, Zhang Y, Fink DL, Oikonomou V, Snow AL, Dalgard CL, Chen J, Sellers BA, Montealegre Sanchez GA, Barron K, Rey-Jurado E, Vial C, Poli MC, Licari A, Montagna D, Marseglia GL, Licciardi F, Ramenghi U, Discepolo V, Lo Vecchio A, Guarino A, Eisenstein EM, Imberti L, Sottini A, Biondi A, Mató S, Gerstbacher D, Truong M, Stack MA, Magliocco M, Bosticardo M, Kawai T, Danielson JJ, Hulett T, Askenazi M, Hu S, Cohen JI, Su HC, Kuhns DB, Lionakis MS, Snyder TM, Holland SM, Goldbach-Mansky R, Tsang JS, Notarangelo LD. Immunopathological signatures in multisystem inflammatory syndrome in children and pediatric COVID-19. Nat Med 2022; 28:1050-1062. [PMID: 35177862 PMCID: PMC9119950 DOI: 10.1038/s41591-022-01724-3] [Citation(s) in RCA: 121] [Impact Index Per Article: 60.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Accepted: 01/31/2022] [Indexed: 12/22/2022]
Abstract
Pediatric Coronavirus Disease 2019 (pCOVID-19) is rarely severe; however, a minority of children infected with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) might develop multisystem inflammatory syndrome in children (MIS-C), with substantial morbidity. In this longitudinal multi-institutional study, we applied multi-omics (analysis of soluble biomarkers, proteomics, single-cell gene expression and immune repertoire analysis) to profile children with COVID-19 (n = 110) and MIS-C (n = 76), along with pediatric healthy controls (pHCs; n = 76). pCOVID-19 was characterized by robust type I interferon (IFN) responses, whereas prominent type II IFN-dependent and NF-κB-dependent signatures, matrisome activation and increased levels of circulating spike protein were detected in MIS-C, with no correlation with SARS-CoV-2 PCR status around the time of admission. Transient expansion of TRBV11-2 T cell clonotypes in MIS-C was associated with signatures of inflammation and T cell activation. The association of MIS-C with the combination of HLA A*02, B*35 and C*04 alleles suggests genetic susceptibility. MIS-C B cells showed higher mutation load than pCOVID-19 and pHC. These results identify distinct immunopathological signatures in pCOVID-19 and MIS-C that might help better define the pathophysiology of these disorders and guide therapy.
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Affiliation(s)
- Keith Sacco
- Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Riccardo Castagnoli
- Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
- Pediatric Clinic, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy; Department of Clinical, Surgical, Diagnostic and Pediatric Sciences, University of Pavia, Pavia, Italy
| | - Svetlana Vakkilainen
- Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Can Liu
- Multiscale Systems Biology Section, Laboratory of Immune System Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
- Graduate Program in Biological Sciences, University of Maryland, College Park, MD, USA
| | - Ottavia M Delmonte
- Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Cihan Oguz
- NIAID Collaborative Bioinformatics Resource (NCBR), National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
- Advanced Biomedical Computational Science, Frederick National Laboratory for Cancer Research, Leidos Biomedical Research, Inc, Frederick, MD, USA
| | | | - Sara Alehashemi
- Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Peter D Burbelo
- National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA
| | - Farzana Bhuyan
- Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Adriana A de Jesus
- Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Kerry Dobbs
- Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Lindsey B Rosen
- Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Aristine Cheng
- Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Elana Shaw
- Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | | | - Francesca Pala
- Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Justin Lack
- Multiscale Systems Biology Section, Laboratory of Immune System Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
- NIAID Collaborative Bioinformatics Resource (NCBR), National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Yu Zhang
- Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Danielle L Fink
- Applied/Developmental Research Directorate, Frederick National Laboratory for Cancer Research, Frederick, MD, USA
| | - Vasileios Oikonomou
- Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Andrew L Snow
- Department of Pharmacology & Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| | - Clifton L Dalgard
- Department of Anatomy, Physiology & Genetics, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
- The American Genome Center, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| | - Jinguo Chen
- Trans-NIH Center for Human Immunology, Autoimmunity, and Inflammation (CHI), National Institutes of Health, Bethesda, MD, USA
| | - Brian A Sellers
- Trans-NIH Center for Human Immunology, Autoimmunity, and Inflammation (CHI), National Institutes of Health, Bethesda, MD, USA
| | - Gina A Montealegre Sanchez
- Intramural Clinical Management and Operation Branch (ICMOB), Division of Clinical Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Karyl Barron
- Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Emma Rey-Jurado
- Facultad de Medicina Clínica Alemana Universidad del Desarrollo, Santiago, Chile
| | - Cecilia Vial
- Facultad de Medicina Clínica Alemana Universidad del Desarrollo, Santiago, Chile
| | - Maria Cecilia Poli
- Facultad de Medicina Clínica Alemana Universidad del Desarrollo, Santiago, Chile
- Unidad de Inmunología y Reumatología, Hospital de niños Dr. Roberto del Río, Santiago, Chile
| | - Amelia Licari
- Pediatric Clinic, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy; Department of Clinical, Surgical, Diagnostic and Pediatric Sciences, University of Pavia, Pavia, Italy
| | - Daniela Montagna
- Pediatric Clinic, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy; Department of Clinical, Surgical, Diagnostic and Pediatric Sciences, University of Pavia, Pavia, Italy
- Laboratory of Immunology and Transplantation, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy
| | - Gian Luigi Marseglia
- Pediatric Clinic, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy; Department of Clinical, Surgical, Diagnostic and Pediatric Sciences, University of Pavia, Pavia, Italy
| | - Francesco Licciardi
- Department of Pediatric and Public Health Sciences, Regina Margherita Children's Hospital, A.O.U. Città Della Salute E Della Scienza Di Torino, University of Turin, Turin, Italy
| | - Ugo Ramenghi
- Department of Pediatric and Public Health Sciences, Regina Margherita Children's Hospital, A.O.U. Città Della Salute E Della Scienza Di Torino, University of Turin, Turin, Italy
| | - Valentina Discepolo
- Department of Translational Medical Sciences, Section of Pediatrics, University of Naples Federico II, Napoli, Italy
| | - Andrea Lo Vecchio
- Department of Translational Medical Sciences, Section of Pediatrics, University of Naples Federico II, Napoli, Italy
| | - Alfredo Guarino
- Department of Translational Medical Sciences, Section of Pediatrics, University of Naples Federico II, Napoli, Italy
| | - Eli M Eisenstein
- Department of Pediatrics, Hadassah-Hebrew University Medical Center, Mount Scopus, Jerusalem, Israel
| | - Luisa Imberti
- CREA Laboratory (AIL Center for Hemato-Oncologic Research), Diagnostic Department, ASST Spedali Civili di Brescia, Brescia, Italy
| | - Alessandra Sottini
- CREA Laboratory (AIL Center for Hemato-Oncologic Research), Diagnostic Department, ASST Spedali Civili di Brescia, Brescia, Italy
| | - Andrea Biondi
- Pediatric Department and Centro Tettamanti-European Reference Network PaedCan, EuroBloodNet, MetabERN, University of Milano Bicocca, Fondazione MBBM, Ospedale San Gerardo, Monza, Italy
| | - Sayonara Mató
- Randall Children's Hospital at Legacy Emanuel, Portland, OR, USA
| | - Dana Gerstbacher
- Division of Pediatric Rheumatology, Stanford Children's Hospital, Stanford, CA, USA
| | - Meng Truong
- Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Michael A Stack
- Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Mary Magliocco
- Molecular Development of the Immune System Section, Laboratory of Immune System Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Marita Bosticardo
- Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Tomoki Kawai
- Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Jeffrey J Danielson
- Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Tyler Hulett
- CDI Laboratories, Antygen Division, Baltimore, MD, USA
| | | | - Shaohui Hu
- CDI Laboratories, Antygen Division, Baltimore, MD, USA
| | - Jeffrey I Cohen
- Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Helen C Su
- Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Douglas B Kuhns
- Applied/Developmental Research Directorate, Frederick National Laboratory for Cancer Research, Frederick, MD, USA
| | - Michail S Lionakis
- Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | | | - Steven M Holland
- Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Raphaela Goldbach-Mansky
- Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - John S Tsang
- Multiscale Systems Biology Section, Laboratory of Immune System Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
- NIH Center for Human Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Luigi D Notarangelo
- Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA.
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5
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Carmona-Rivera C, Zhang Y, Dobbs K, Markowitz TE, Dalgard CL, Oler AJ, Claybaugh DR, Draper D, Truong M, Delmonte OM, Licciardi F, Ramenghi U, Crescenzio N, Imberti L, Sottini A, Quaresima V, Fiorini C, Discepolo V, Lo Vecchio A, Guarino A, Pierri L, Catzola A, Biondi A, Bonfanti P, Poli Harlowe MC, Espinosa Y, Astudillo C, Rey-Jurado E, Vial C, de la Cruz J, Gonzalez R, Pinera C, Mays JW, Ng A, Platt A, Drolet B, Moon J, Cowen EW, Kenney H, Weber SE, Castagnoli R, Magliocco M, Stack MA, Montealegre G, Barron K, Hewitt SM, Arkin LM, Chertow DS, Su HC, Notarangelo LD, Kaplan MJ. Multicenter analysis of neutrophil extracellular trap dysregulation in adult and pediatric COVID-19. medRxiv 2022:2022.02.24.22271475. [PMID: 35262093 PMCID: PMC8902885 DOI: 10.1101/2022.02.24.22271475] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Dysregulation in neutrophil extracellular trap (NET) formation and degradation may play a role in the pathogenesis and severity of COVID-19; however, its role in the pediatric manifestations of this disease including MIS-C and chilblain-like lesions (CLL), otherwise known as "COVID toes", remains unclear. Studying multinational cohorts, we found that, in CLL, NETs were significantly increased in serum and skin. There was geographic variability in the prevalence of increased NETs in MIS-C, in association with disease severity. MIS-C and CLL serum samples displayed decreased NET degradation ability, in association with C1q and G-actin or anti-NET antibodies, respectively, but not with genetic variants of DNases. In adult COVID-19, persistent elevations in NETs post-disease diagnosis were detected but did not occur in asymptomatic infection. COVID-19-affected adults displayed significant prevalence of impaired NET degradation, in association with anti-DNase1L3, G-actin, and specific disease manifestations, but not with genetic variants of DNases. NETs were detected in many organs of adult patients who died from COVID-19 complications. Infection with the Omicron variant was associated with decreased levels of NETs when compared to other SARS-CoV-2 strains. These data support a role for NETs in the pathogenesis and severity of COVID-19 in pediatric and adult patients. Summary NET formation and degradation are dysregulated in pediatric and symptomatic adult patients with various complications of COVID-19, in association with disease severity. NET degradation impairments are multifactorial and associated with natural inhibitors of DNase 1, G-actin and anti-DNase1L3 and anti-NET antibodies. Infection with the Omicron variant is associated with decreased levels of NETs when compared to other SARS-CoV-2 strains.
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Affiliation(s)
- Carmelo Carmona-Rivera
- Systemic Autoimmunity Branch, National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS), National Institutes of Health (NIH), Bethesda, MD, USA
| | - Yu Zhang
- Human Immunological Diseases Section, Laboratory of Clinical Immunology and Microbiology (LCIM), National Institute of Allergy and Infectious Diseases (NIAID), NIH, Bethesda, MD, USA
| | | | - Tovah E. Markowitz
- Bioinformatics and Computational Biosciences Branch, Office of Cyber Infrastructure and Computational Biology, NIAID, NIH, Bethesda, MD
- Axle Informatics, Bethesda, MD, USA
| | - Clifton L. Dalgard
- Department of Anatomy, Physiology & Genetics, School of Medicine, Uniformed Services University of the Health Sciences (USUHS), Bethesda, MD and The American Genome Center, USUHS, Bethesda, MD, USA
| | - Andrew J. Oler
- Bioinformatics and Computational Biosciences Branch, Office of Cyber Infrastructure and Computational Biology, NIAID, NIH, Bethesda, MD
| | - Dillon R. Claybaugh
- Systemic Autoimmunity Branch, National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS), National Institutes of Health (NIH), Bethesda, MD, USA
| | | | | | | | - Francesco Licciardi
- Department of Public Health and Pediatric Sciences, “Regina Margherita” Children’s Hospital, University of Turin, Turin, Italy
| | - Ugo Ramenghi
- Department of Public Health and Pediatric Sciences, “Regina Margherita” Children’s Hospital, University of Turin, Turin, Italy
| | - Nicoletta Crescenzio
- Pediatric Hematology, “Regina Margherita” Children Hospital, University of Turin, Turin, Italy
| | - Luisa Imberti
- Centro di Ricerca Emato-oncologica AIL (CREA), Diagnostic Department, ASST Spedali Civili di Brescia, Brescia, Italy
| | - Alessandra Sottini
- Centro di Ricerca Emato-oncologica AIL (CREA), Diagnostic Department, ASST Spedali Civili di Brescia, Brescia, Italy
| | - Virginia Quaresima
- Centro di Ricerca Emato-oncologica AIL (CREA), Diagnostic Department, ASST Spedali Civili di Brescia, Brescia, Italy
| | - Chiara Fiorini
- Centro di Ricerca Emato-oncologica AIL (CREA), Diagnostic Department, ASST Spedali Civili di Brescia, Brescia, Italy
| | - Valentina Discepolo
- Department of Translational Medical Sciences, Pediatric Section, University of Naples Federico II, Naples, Italy
| | - Andrea Lo Vecchio
- Department of Translational Medical Sciences, Pediatric Section, University of Naples Federico II, Naples, Italy
| | - Alfredo Guarino
- Department of Translational Medical Sciences, Pediatric Section, University of Naples Federico II, Naples, Italy
| | - Luca Pierri
- Department of Translational Medical Sciences, Pediatric Section, University of Naples Federico II, Naples, Italy
| | - Andrea Catzola
- Department of Translational Medical Sciences, Pediatric Section, University of Naples Federico II, Naples, Italy
| | - Andrea Biondi
- Department of Pediatrics, University of Milano-Bicocca, European Reference Network (ERN) PaedCan, EuroBloodNet, MetabERN, Fondazione MBBM/Ospedale San Gerardo, Monza, Italy
| | - Paolo Bonfanti
- Department of Infectious Diseases, San Gerardo Hospital–University of Milano-Bicocca, Monza, Italy
| | - Maria Cecilia Poli Harlowe
- Programa de Inmunogenética e Inmunología Traslacional, Instituto de Ciencias e Innovación en Medicina, Facultad de Medicina Clínica Alemana, Universidad del Desarrollo, Santiago, Chile
- Hospital Roberto del Rio, Santiago, Chile
| | | | | | - Emma Rey-Jurado
- Programa de Inmunogenética e Inmunología Traslacional, Instituto de Ciencias e Innovación en Medicina, Facultad de Medicina Clínica Alemana, Universidad del Desarrollo, Santiago, Chile
| | - Cecilia Vial
- Facultad de Medicina Clínica Alemana Universidad del Desarrollo, Programa Hantavirus, Instituto de Ciencias e Innovación en Medicina, Santiago, Chile
| | - Javiera de la Cruz
- Programa de Inmunogenética e Inmunología Traslacional, Instituto de Ciencias e Innovación en Medicina, Facultad de Medicina Clínica Alemana, Universidad del Desarrollo, Santiago, Chile
| | - Ricardo Gonzalez
- Pediatric Intensive Care Unit, Hospital Exequiel Gonzalez Cortés, Santiago, Chile
| | - Cecilia Pinera
- Infectious Diseases Unit, Hospital Dr. Exequiel González Cortés, Región Metropolitana, Chile
- Faculty of Medicine, Universidad de Chile, Santiago, Chile
| | - Jacqueline W. Mays
- National Institute of Dental and Craniofacial Research, NIH, Bethesda, MD, USA
| | - Ashley Ng
- Department of Dermatology, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Andrew Platt
- Emerging Pathogens Section, Critical Care Medicine Department, Clinical Center, and Laboratory of Immunoregulation, NIAID, NIH, Bethesda, MD, USA
| | | | | | - Beth Drolet
- Department of Dermatology, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - John Moon
- Department of Dermatology, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Edward W. Cowen
- Molecular Development of the Immune System Section, Laboratory of Immune System Biology, NIAID, NIH, Bethesda, MD
| | | | | | | | | | | | | | - Karyl Barron
- Division of Clinical Research, NIAID, NIH, Bethesda, MD
| | - Stephen M. Hewitt
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD, USA
| | - Lisa M. Arkin
- Department of Dermatology, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Daniel S. Chertow
- Emerging Pathogens Section, Critical Care Medicine Department, Clinical Center, and Laboratory of Immunoregulation, NIAID, NIH, Bethesda, MD, USA
| | - Helen C. Su
- Human Immunological Diseases Section, Laboratory of Clinical Immunology and Microbiology (LCIM), National Institute of Allergy and Infectious Diseases (NIAID), NIH, Bethesda, MD, USA
| | | | - Mariana J. Kaplan
- Systemic Autoimmunity Branch, National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS), National Institutes of Health (NIH), Bethesda, MD, USA
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6
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Masvekar RR, Kosa P, Jin K, Dobbs K, Stack MA, Castagnoli R, Quaresima V, Su HC, Imberti L, Notarangelo LD, Bielekova B. Prognostic Value of Serum/Plasma Neurofilament Light Chain for COVID-19 Associated Mortality.. [PMID: 35075461 PMCID: PMC8786234 DOI: 10.1101/2022.01.13.22269244] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Given the continued spread of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), early predictors of coronavirus disease 19 (COVID-19) mortality might improve patients’ outcomes. Increased levels of circulating neurofilament light chain (NfL), a biomarker of neuro-axonal injury, have been observed in patients with severe COVID-19. We investigated whether NfL provides non-redundant clinical value to previously identified predictors of COVID-19 mortality. We measured serum or plasma NfL concentrations in a blinded fashion in 3 cohorts totaling 338 COVID-19 patients. In cohort 1, we found significantly elevated NfL levels only in critically ill COVID-19 patients compared to healthy controls. Longitudinal cohort 2 data showed that NfL is elevated late in the course of the disease, following two other prognostic markers of COVID-19: decrease in absolute lymphocyte count (ALC) and increase in lactate dehydrogenase (LDH). Significant correlations between LDH and ALC abnormalities and subsequent rise of NfL implicate multi-organ failure as a likely cause of neuronal injury at the later stages of COVID-19. Addition of NfL to age and gender in cohort 1 significantly improved the accuracy of mortality prediction and these improvements were validated in cohorts 2 and 3. In conclusion, although substantial increase in serum/plasma NfL reproducibly enhances COVID-19 mortality prediction, NfL has clinically meaningful prognostic value only close to death, which may be too late to alter medical management. When combined with other prognostic biomarkers, rising longitudinal NfL measurements triggered by LDH and ALC abnormalities would identify patients at risk of COVID-19 associated mortality who might still benefit from escalated care.
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7
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Stack MA, Fitzgerald G, O'Connell S, James KJ. Measurement of trihalomethanes in potable and recreational waters using solid phase micro extraction with gas chromatography-mass spectrometry. Chemosphere 2000; 41:1821-1826. [PMID: 11057623 DOI: 10.1016/s0045-6535(00)00047-3] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Solid phase micro extraction (SPME) was applied to the determination of selected trihalomethanes (THMs), chloroform, bromodichloromethane, dibromochloromethane, bromoform, in potable and recreational waters. The selected samples were environmentally significant due to mandatory limits imposed by regulatory agencies. Extraction of the analytes was performed using headspace SPME (fused silica fibre with a 100 microm poly(dimethylsiloxane coating) followed by thermal desorption at 220 degrees C and GC-MS analysis. A linear working range of 10-160 microg/l was established with relative standard deviations (%RSD) within the range, 0.9-19%. Limits of detection (LOD) were 1.0-2.8 microg/l. The highest THM concentration was 61.8 microg/l which was well within the proposed European Union directive of 100 microg/l. The total THMs determined in swimming pool waters ranged from 105-134 microg/l, with chloroform accounting for 84-86% of total THM.
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Affiliation(s)
- M A Stack
- Chemistry Department, Cork Institute of Technology, Bishopstown, Ireland.
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8
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Fitzgerald G, James KJ, MacNamara K, Stack MA. Characterisation of whiskeys using solid-phase microextraction with gas chromatography-mass spectrometry. J Chromatogr A 2000; 896:351-9. [PMID: 11093670 DOI: 10.1016/s0021-9673(00)00737-8] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The application of solid-phase microextraction and gas chromatography-mass spectrometry to the detection of flavour volatiles present in Irish and Scottish whiskeys was investigated. A method was developed to characterise these volatiles which included the extraction, identification and quantification of 17 congeners which included fusel alcohols, acetates and esters. The method validation produced the optimum fibre [85 microm poly(acrylate)], extraction time (35 min), sample volume size (3 ml) and desorption time (5 min). The impact of salt on the absorption process was also studied. Characteristic profiles were determined for each whiskey and the flavour congeners were quantified using 4-methyl-2-pentanol as the internal standard. Calibration ranges were determined for each of the congeners with coefficients of linearity ranging from 0.993 (butan-1-ol) to 0.999 (ethyl laurate) and relative standard deviations ranging from 2.5% (2-methylbutan-1-ol) to 21% (furfural) at a concentration of 18.2 mg/l. Detection limits ranged from 0.1 mg/l (ethyl caprate) to 21 mg/l (butan-2-ol).
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Affiliation(s)
- G Fitzgerald
- Chemistry Department, Cork Institute of Technology, Bishopstown, Ireland
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9
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James KJ, Furey A, Sherlock IR, Stack MA, Twohig M, Caudwell FB, Skulberg OM. Sensitive determination of anatoxin-a, homoanatoxin-a and their degradation products by liquid chromatography with fluorimetric detection. J Chromatogr A 1998; 798:147-57. [PMID: 9542136 DOI: 10.1016/s0021-9673(97)01207-7] [Citation(s) in RCA: 97] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Cyanobacterial neurotoxins have been implicated in animal deaths resulting from drinking contaminated water. Anatoxin-a (AN) and homoanatoxin-a (HMAN) have previously been analysed using high-performance liquid chromatography (HPLC) with UV detection, but this procedure is insufficiently sensitive and is subject to interferences. A sensitive fluorimetric (FL) method for determining AN was recently developed using derivatisation with 4-fluoro-7-nitro-2,1,3-benzoxadiazole (NBD-F) and this has been applied to the simultaneous determination of AN, HMAN and their epoxy and dihydro degradation products. Microscale syntheses were used to prepare the dihydro and epoxy derivatives from AN and HMAN. These compounds were produced in high yields, as confirmed by electrospray MS and HPLC-FL of their benzoxadiazole derivatives. All six NBD derivatives were readily separated using isocratic reversed-phase HPLC. The recoveries of these compounds from spiked water samples, using weak cation-exchange (WCX) solid-phase extraction (SPE), were 83.2-84.9% at concentrations of 10 micrograms/l. The R.S.D. values were 1.7-3.9% (n = 8) and the limits of detection were better than 10 ng/l for all six compounds, illustrating the high sensitivity of the method. This methodology was successfully applied to the analysis toxin degradation products in natural samples. Dihydroanatoxin-a (0.8 mg/g) was isolated from a benthic Oscillatoria bloom from Caragh Lake, Ireland, and was found to contain two isomers but their ratio was different from that found in the synthetic material.
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Affiliation(s)
- K J James
- Chemistry Department, Cork RTC, Bishopstown, Ireland
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10
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Abstract
A new sensitive high-performance liquid chromatographic (HPLC) method was used to determine anatoxin-a in freshwater, following blooms of cyanobacteria (blue-green algae). Anatoxin-a was converted into a highly fluorescent derivative using 4-fluoro-7-nitro-2,1,3-benzoxadiazole and HPLC analysis gave good linear calibrations even at low concentration ranges (1-10 micrograms/liter, r = 0.997). The detection limit for anatoxin-a was 0.02 ng/ml, and this new HPLC method should prove useful for the routine analysis of potable waters. Anatoxin-a was discovered in three major lakes in Ireland using this method and identification was confirmed using gas chromatraphy-mass spectrometry (GC-MS), following acetylation. Anatoxin-a was found in Anabaena, a planktonic cyanobacterium, as well as in a benthic Oscillatoria species. This is the first identification of anatoxin-a in Irish freshwater and this toxin was also implicated as the causative agent in incidents of fatal canine neurotoxicosis.
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Affiliation(s)
- K J James
- Chemistry Department, Cork RTC, Republic of Ireland
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