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Valent P, Akin C, Arock M. Reversible Elevation of Tryptase Over the Individual's Baseline: Why is It the Best Biomarker for Severe Systemic Mast Cell Activation and MCAS? Curr Allergy Asthma Rep 2024; 24:133-141. [PMID: 38308674 PMCID: PMC10960756 DOI: 10.1007/s11882-024-01124-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/03/2024] [Indexed: 02/05/2024]
Abstract
PURPOSE OF REVIEW Mast cell (MC) activation syndromes (MCAS) are conditions defined by recurrent episodes of severe systemic anaphylaxis or similar systemic events triggered by MC-derived mediators that can be measured in biological fluids. Since some symptoms of MC activation may occur due to other, non-MC etiologies and lead to confusion over diagnosis, it is of crucial importance to document the involvement of MC and their products in the patients´ symptomatology. RECENT FINDINGS The most specific and generally accepted marker of severe systemic MC activation is an event-related, transient increase in the serum tryptase level over the individual baseline of the affected individual. However, baseline concentrations of serum tryptase vary among donors, depending on the genetic background, age, kidney function, and underlying disease. As a result, it is of critical importance to provide a flexible equation that defines the diagnostic increase in tryptase qualifying as MCAS criterion in all patients, all situations, and all ranges of baseline serum tryptase. In 2012, the consensus group proposed the 120% + 2 ng/ml formula, which covers the great majority of groups, including cases with low, normal, or elevated basal serum tryptase level. This formula has been validated in subsequent studies and has proven to be a robust and consistent diagnostic criterion of MCAS. The present article is discussing the impact of this formula and possible limitations as well as alternative markers and mediators that may be indicative of MCAS.
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Affiliation(s)
- Peter Valent
- Department of Internal Medicine I, Division of Hematology and Hemostaseology, Medical University of Vienna, Vienna, Austria.
- Ludwig Boltzmann Institute for Hematology and Oncology, Medical University of Vienna, Vienna, Austria.
| | - Cem Akin
- Division of Allergy and Clinical Immunology, University of Michigan, Ann Arbor, MI, USA
| | - Michel Arock
- Platform of Molecular Analysis for Mastocytosis and MCAD (CEREMAST), Department of Biological Hematology, Pitié-Salpêtrière Hospital, AP-HP, Paris Sorbonne University, Paris, France
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Valent P, Hoermann G, Bonadonna P, Hartmann K, Sperr WR, Broesby-Olsen S, Brockow K, Niedoszytko M, Hermine O, Chantran Y, Butterfield JH, Greiner G, Carter MC, Sabato V, Radia DH, Siebenhaar F, Triggiani M, Gülen T, Alvarez-Twose I, Staudinger T, Traby L, Sotlar K, Reiter A, Horny HP, Orfao A, Galli SJ, Schwartz LB, Lyons JJ, Gotlib J, Metcalfe DD, Arock M, Akin C. The Normal Range of Baseline Tryptase Should Be 1 to 15 ng/mL and Covers Healthy Individuals With HαT. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY. IN PRACTICE 2023; 11:3010-3020. [PMID: 37572755 DOI: 10.1016/j.jaip.2023.08.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 07/27/2023] [Accepted: 08/01/2023] [Indexed: 08/14/2023]
Abstract
Physiological levels of basal serum tryptase vary among healthy individuals, depending on the numbers of mast cells, basal secretion rate, copy numbers of the TPSAB1 gene encoding alpha tryptase, and renal function. Recently, there has been a growing debate about the normal range of tryptase because individuals with the hereditary alpha tryptasemia (HαT) trait may or may not be symptomatic, and if symptomatic, uncertainty exists as to whether this trait directly causes clinical phenotypes or aggravates certain conditions. In fact, most HαT-positive cases are regarded as asymptomatic concerning mast cell activation. To address this point, experts of the European Competence Network on Mastocytosis (ECNM) and the American Initiative in Mast Cell Diseases met at the 2022 Annual ECNM meeting and discussed the physiological tryptase range. Based on this discussion, our faculty concluded that the normal serum tryptase range should be defined in asymptomatic controls, inclusive of individuals with HαT, and based on 2 SDs covering the 95% confidence interval. By applying this definition in a literature screen, the normal basal tryptase in asymptomatic controls (HαT-positive persons included) ranges between 1 and 15 ng/mL. This definition should avoid overinterpretation, unnecessary referrals, and unnecessary anxiety or anticipatory fear of illness in healthy individuals.
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Affiliation(s)
- Peter Valent
- Division of Haematology, Department of Internal Medicine I, Medical University of Vienna, Vienna, Austria; Ludwig Boltzmann Institute for Hematology and Oncology, Medical University of Vienna, Vienna, Austria.
| | - Gregor Hoermann
- Ludwig Boltzmann Institute for Hematology and Oncology, Medical University of Vienna, Vienna, Austria; MLL Munich Leukemia Laboratory, Munich, Germany
| | | | - Karin Hartmann
- Division of Allergy, Department of Dermatology, University Hospital Basel and University of Basel, Basel, Switzerland; Department of Biomedicine, University Hospital Basel and University of Basel, Basel, Switzerland
| | - Wolfgang R Sperr
- Division of Haematology, Department of Internal Medicine I, Medical University of Vienna, Vienna, Austria; Ludwig Boltzmann Institute for Hematology and Oncology, Medical University of Vienna, Vienna, Austria
| | - Sigurd Broesby-Olsen
- Department of Dermatology and Allergy Centre, Odense University Hospital, Odense, Denmark
| | - Knut Brockow
- Department of Dermatology and Allergy Biederstein, Technical University of Munich, Munich, Germany
| | - Marek Niedoszytko
- Department of Allergology, Medical University of Gdansk, Gdansk, Poland
| | - Olivier Hermine
- Service d'hématologie, Imagine Institute Université de Paris, Centre national de référence des mastocytoses, Hôpital Necker, Assistance publique hôpitaux de Paris, Paris, France
| | - Yannick Chantran
- Department of Biological Immunology, Saint-Antoine Hospital, Paris Sorbonne University, Paris, France
| | | | - Georg Greiner
- Ludwig Boltzmann Institute for Hematology and Oncology, Medical University of Vienna, Vienna, Austria; Ihr Labor, Medical Diagnostic Laboratories, Vienna, Austria
| | - Melody C Carter
- Laboratory of Allergic Diseases, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, Md
| | - Vito Sabato
- Faculty of Medicine and Health Sciences, Department of Immunology-Allergology-Rheumatology, University of Antwerp and Antwerp University Hospital, Antwerp, Belgium
| | - Deepti H Radia
- Guy's & St. Thomas' National Health Service (NHS) Foundation Trust, Guy's Hospital, London, UK
| | - Frank Siebenhaar
- Institute of Allergology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany; Fraunhofer Institute for Translational Medicine and Pharmacology (ITMP), Immunology and Allergology (IA), Berlin, Germany
| | - Massimo Triggiani
- Division of Allergy and Clinical Immunology, University of Salerno, Salerno, Italy
| | - Theo Gülen
- Department of Respiratory Medicine and Allergy, Karolinska University Hospital Huddinge, Stockholm, Sweden; Department of Medicine Solna, Division of Immunology and Allergy, Karolinska Institutet, Stockholm, Sweden
| | - Ivan Alvarez-Twose
- Instituto de Estudios de Mastocitosis de Castilla La Mancha (CLMast) and CIBERONC, Hospital Virgen del Valle, Toledo, Spain
| | - Thomas Staudinger
- Department of Internal Medicine I, Intensive Care Unit, Medical University of Vienna, Vienna, Austria
| | - Ludwig Traby
- Department of Internal Medicine I, Division of Infectious Diseases and Tropical Medicine, Medical University of Vienna, Vienna, Austria
| | - Karl Sotlar
- Institute of Pathology, University Hospital Salzburg, Paracelsus Medical University, Salzburg, Austria
| | - Andreas Reiter
- Department of Hematology and Oncology, University Hospital Mannheim, Mannheim, Germany
| | - Hans-Peter Horny
- Institute of Pathology, Ludwig-Maximilians-University, Munich, Germany
| | - Alberto Orfao
- Servicio Central de Citometria, Centro de Investigacion del Cancer (IBMCC CSIC/USAL) Instituto Biosanitario de Salamanca (IBSAL), CIBERONC and Department of Medicine, University of Salamanca, Salamanca, Spain
| | - Stephen J Galli
- Department of Pathology, Department of Microbiology and Immunology, Sean N. Parker Center for Allergy and Asthma Research, Stanford University School of Medicine, Stanford, Calif
| | - Lawrence B Schwartz
- Department of Internal Medicine, Division of Rheumatology, Allergy, and Immunology, Virginia Commonwealth University, Richmond, Va
| | - Jonathan J Lyons
- Translational Allergic Immunopathology Unit, Laboratory of Allergic Diseases, NIAID, NIH, Bethesda, Md
| | - Jason Gotlib
- Stanford University School of Medicine/Stanford Cancer Institute, Stanford, Calif
| | - Dean D Metcalfe
- Laboratory of Allergic Diseases, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, Md
| | - Michel Arock
- Department of Hematological Biology, Pitié-Salpêtrière Hospital, Paris Sorbonne University, Paris, France
| | - Cem Akin
- Division of Allergy and Clinical Immunology, University of Michigan, Ann Arbor, Mich
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Rama TA, Torrado I, Henriques AF, Sánchez-Muñoz L, Jara-Acevedo M, Navarro-Navarro P, Caldas C, Mayado A, Muñoz-González J, García-Montero A, Mollejo M, Redondo E, Garbán A, Moreira A, Órfão A, Álvarez-Twose I. Mast Cell Activation Syndromes: Comparison Between Two Scoring Models to Predict for Mast Cell Clonality. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY. IN PRACTICE 2023; 11:908-919.e4. [PMID: 36535520 DOI: 10.1016/j.jaip.2022.11.042] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 10/24/2022] [Accepted: 11/30/2022] [Indexed: 12/23/2022]
Abstract
BACKGROUND The Red Española de Mastocitosis (Spanish Network on Mastocytosis) score (REMAs) and the National Institutes of Health idiopathic clonal anaphylaxis score (NICAS) were developed for more efficient screening of mast cell (MC) clonality in MC activation syndromes. In a limited idiopathic anaphylaxis case series, the NICAS showed higher accuracy compared with the REMAs. OBJECTIVE To compare the performance of the REMAs against the NICAS in the diagnosis of MC clonality. METHODS We compared the diagnostic value of the REMAs against the NICAS in 182 patients (63% men, median age 56 years) who presented with anaphylaxis triggered by Hymenoptera venom allergy (45%), drugs (15%), food (11%), idiopathic anaphylaxis (20%), and mixed causes (10%). KIT mutation was assessed in parallel in whole blood and bone marrow (BM) and, when negative, in highly purified BM MC. TPSAB1 was genotyped in a subset of 71 patients. RESULTS We found higher accuracy and rates of correctly classified patients for the REMAs (82% and 84%) compared with the NICAS (75% and 75%; P = .02 and P = .03, respectively), particularly among men (P = .05), patients with systemic mastocytosis (P = .05), those presenting anaphylaxis owing to any cause featuring urticaria (P = .04), cardiovascular symptoms (P = .02), and/or presyncope (P = .02) and those with a blood-negative/BM-positive KIT mutational profile (P = .002), but not hereditary α-tryptasemia-associated genotypes. Combined assessment of the REMAs and KITD816V in blood yielded an overall improved classification efficiency of 86% versus 84% for REMAs. CONCLUSIONS The combined use of the REMAs and blood detection of KITD816V is recommended, but more sensitive blood-based molecular assays to detect KITD816V are needed.
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Affiliation(s)
- Tiago Azenha Rama
- Serviço de Imunoalergologia, Centro Hospitalar Universitário São João, Porto, Portugal; Serviço de Imunologia Básica e Clínica, Departamento de Patologia, Faculdade de Medicina da Universidade do Porto, Porto, Portugal; EPIUnit, Institute of Public Health, University of Porto, Porto, Portugal; Laboratory for Integrative and Translational Research in Population Health, Porto, Portugal
| | - Inés Torrado
- Instituto de Estudios de Mastocitosis de Castilla La Mancha, Reference Center for Mastocytosis, Hospital Virgen del Valle, Complejo Hospitalario Universitario de Toledo, Toledo, Spain
| | - Ana Filipa Henriques
- Instituto de Estudios de Mastocitosis de Castilla La Mancha, Reference Center for Mastocytosis, Hospital Virgen del Valle, Complejo Hospitalario Universitario de Toledo, Toledo, Spain; Spanish Network on Mastocytosis, Toledo and Salamanca, Spain
| | - Laura Sánchez-Muñoz
- Instituto de Estudios de Mastocitosis de Castilla La Mancha, Reference Center for Mastocytosis, Hospital Virgen del Valle, Complejo Hospitalario Universitario de Toledo, Toledo, Spain; Spanish Network on Mastocytosis, Toledo and Salamanca, Spain; Centro de Investigación Biomédica en Red de Cáncer, Instituto de Salud Carlos III, Madrid, Spain
| | - Maria Jara-Acevedo
- Spanish Network on Mastocytosis, Toledo and Salamanca, Spain; Centro de Investigación Biomédica en Red de Cáncer, Instituto de Salud Carlos III, Madrid, Spain; DNA Sequencing Service, Instituto de Investigación Biomédica de Salamanca, University of Salamanca, Salamanca, Spain
| | - Paula Navarro-Navarro
- Spanish Network on Mastocytosis, Toledo and Salamanca, Spain; Centro de Investigación Biomédica en Red de Cáncer, Instituto de Salud Carlos III, Madrid, Spain; DNA Sequencing Service, Instituto de Investigación Biomédica de Salamanca, University of Salamanca, Salamanca, Spain
| | - Carolina Caldas
- Spanish Network on Mastocytosis, Toledo and Salamanca, Spain; Centro de Investigación Biomédica en Red de Cáncer, Instituto de Salud Carlos III, Madrid, Spain; DNA Sequencing Service, Instituto de Investigación Biomédica de Salamanca, University of Salamanca, Salamanca, Spain
| | - Andrea Mayado
- Spanish Network on Mastocytosis, Toledo and Salamanca, Spain; Centro de Investigación Biomédica en Red de Cáncer, Instituto de Salud Carlos III, Madrid, Spain; Cancer Research Center, Department of Medicine, Cytometry Service, Instituto de Investigación Biomédica de Salamanca, University of Salamanca, Salamanca, Spain
| | - Javier Muñoz-González
- Spanish Network on Mastocytosis, Toledo and Salamanca, Spain; Centro de Investigación Biomédica en Red de Cáncer, Instituto de Salud Carlos III, Madrid, Spain; Cancer Research Center, Department of Medicine, Cytometry Service, Instituto de Investigación Biomédica de Salamanca, University of Salamanca, Salamanca, Spain
| | - Andrés García-Montero
- Spanish Network on Mastocytosis, Toledo and Salamanca, Spain; Centro de Investigación Biomédica en Red de Cáncer, Instituto de Salud Carlos III, Madrid, Spain; Cancer Research Center, Department of Medicine, Cytometry Service, Instituto de Investigación Biomédica de Salamanca, University of Salamanca, Salamanca, Spain
| | - Manuela Mollejo
- Pathology Department, Hospital Virgen de la Salud, Complejo Hospitalario Universitario de Toledo, Toledo, Spain
| | - Elba Redondo
- Servicio de Alergologia, Hospital Clínico San Carlos, Madrid, Spain
| | - Andrea Garbán
- Servicio de Alergologia, Hospital Clínico San Carlos, Madrid, Spain
| | - André Moreira
- Serviço de Imunoalergologia, Centro Hospitalar Universitário São João, Porto, Portugal; Serviço de Imunologia Básica e Clínica, Departamento de Patologia, Faculdade de Medicina da Universidade do Porto, Porto, Portugal; EPIUnit, Institute of Public Health, University of Porto, Porto, Portugal; Laboratory for Integrative and Translational Research in Population Health, Porto, Portugal
| | - Alberto Órfão
- Spanish Network on Mastocytosis, Toledo and Salamanca, Spain; Centro de Investigación Biomédica en Red de Cáncer, Instituto de Salud Carlos III, Madrid, Spain; Cancer Research Center, Department of Medicine, Cytometry Service, Instituto de Investigación Biomédica de Salamanca, University of Salamanca, Salamanca, Spain
| | - Iván Álvarez-Twose
- Instituto de Estudios de Mastocitosis de Castilla La Mancha, Reference Center for Mastocytosis, Hospital Virgen del Valle, Complejo Hospitalario Universitario de Toledo, Toledo, Spain; Spanish Network on Mastocytosis, Toledo and Salamanca, Spain; Centro de Investigación Biomédica en Red de Cáncer, Instituto de Salud Carlos III, Madrid, Spain.
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Michel M, Klingebiel C, Vitte J. Tryptase in type I hypersensitivity. Ann Allergy Asthma Immunol 2023; 130:169-177. [PMID: 36084866 DOI: 10.1016/j.anai.2022.08.996] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 08/21/2022] [Accepted: 08/29/2022] [Indexed: 02/07/2023]
Abstract
Tryptase is currently the main mast cell biomarker available in medical practice. Tryptase determination is a quantitative test performed in serum or plasma for the diagnosis, stratification, and follow-up of mast cell-related conditions. The continuous secretion of monomeric α and β protryptases forms the baseline tryptase level. Transient, activation-induced release of tryptase is known as acute tryptase. Because mast cells are tissue-resident cells, the detection of an acute tryptase release in the bloodstream is protracted, with a delay of 15 to 20 minutes after the onset of symptoms and a peak at approximately 1 hour. Constitutive release of tryptase is a marker of mast cell number and activity status, whereas transient release of mature tryptase is a marker of mast cell degranulation. Although consensual as a concept, the application of this statement in clinical practice has only been clarified since 2020. For baseline tryptase to be used as a biomarker, reference values need to be established. In contrast, defining a transient increase using acute tryptase can only be achieved as a function of the baseline status.
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Affiliation(s)
- Moïse Michel
- Immunology Laboratory, Centre Hospitalier Universitaire Nîmes, Nîmes, France; Microbes, Evolution, Phylogénie et Infection (MEPHI), Aix-Marseille University, Marseille, France
| | | | - Joana Vitte
- Microbes, Evolution, Phylogénie et Infection (MEPHI), Aix-Marseille University, Marseille, France; Institut Hospitalo-Universitaire (IHU) Méditerranée Infection, Marseille, France; Montpellier University, Institut Desbrest d'Épidémiologie et de Santé Publique, Institut National de la Sante et de la Recherche Medicale, UMR UA 11, Montpellier, France.
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5
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Paul Owens E, Grania Healy H, Andrew Vesey D, Elizabeth Hoy W, Carolyn Gobe G. Targeted biomarkers of progression in chronic kidney disease. Clin Chim Acta 2022; 536:18-28. [PMID: 36041551 DOI: 10.1016/j.cca.2022.08.025] [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: 07/03/2022] [Revised: 08/22/2022] [Accepted: 08/24/2022] [Indexed: 11/03/2022]
Abstract
BACKGROUND Chronic kidney disease (CKD) is an increasingly significant health issue worldwide. Early stages of CKD can be asymptomatic and disease trajectory difficult to predict. Not everyone with CKD progresses to kidney failure, where kidney replacement therapy is the only life-sustaining therapy. Predicting which patients will progress to kidney failure would allow better use of targeted treatments and more effective allocation of health resources. Current diagnostic tests to identify patients with progressive disease perform poorly but there is a suite of new and emerging predictive biomarkers with great clinical promise. METHODS This narrative review describes new and emerging biomarkers of pathophysiologic processes of CKD development and progression, accessible in blood or urine liquid biopsies. Biomarkers were selected based on their reported pathobiological functions in kidney injury, inflammation, oxidative stress, repair and fibrosis. Biomarker function and evidence of involvement in CKD development and progression are reported. CONCLUSION Many biomarkers reviewed here have received little attention to date, perhaps because of conflicting conclusions of their utility in CKD. The functional roles of the selected biomarkers in the underlying pathobiology of progression of CKD are a powerful rationale for advancing and validating these molecules as prognosticators and predictors of CKD trajectory.
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Affiliation(s)
- Evan Paul Owens
- NHMRC CKD CRE (CKD.QLD), The University of Queensland, Brisbane 4072, Australia; Faculty of Medicine, The University of Queensland, Brisbane 4072, Australia; Kidney Disease Research Collaborative, Translational Research Institute, Brisbane 4102, Australia
| | - Helen Grania Healy
- NHMRC CKD CRE (CKD.QLD), The University of Queensland, Brisbane 4072, Australia; Faculty of Medicine, The University of Queensland, Brisbane 4072, Australia; Kidney Health Service, Royal Brisbane and Women's Hospital, Brisbane 4029, Australia
| | - David Andrew Vesey
- NHMRC CKD CRE (CKD.QLD), The University of Queensland, Brisbane 4072, Australia; Faculty of Medicine, The University of Queensland, Brisbane 4072, Australia
| | - Wendy Elizabeth Hoy
- NHMRC CKD CRE (CKD.QLD), The University of Queensland, Brisbane 4072, Australia; Faculty of Medicine, The University of Queensland, Brisbane 4072, Australia; Centre for Chronic Disease, The University of Queensland, Brisbane 4072, Australia
| | - Glenda Carolyn Gobe
- NHMRC CKD CRE (CKD.QLD), The University of Queensland, Brisbane 4072, Australia; Faculty of Medicine, The University of Queensland, Brisbane 4072, Australia; Kidney Disease Research Collaborative, Translational Research Institute, Brisbane 4102, Australia.
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Ebo DG, De Puysseleyr LP, Van Gasse AL, Elst J, Poorten MLVD, Faber MA, Mertens C, Van Houdt M, Hagendorens MM, Sermeus L, Vitte J, Moise M, Garvey LH, Castells MC, Tacquard C, Mertes PM, Schwartz LB, Sabato V. Mast Cell Activation During Suspected Perioperative Hypersensitivity: A Need for Paired Samples Analysis. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY-IN PRACTICE 2021; 9:3051-3059.e1. [PMID: 33862269 DOI: 10.1016/j.jaip.2021.03.050] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 03/12/2021] [Accepted: 03/27/2021] [Indexed: 02/06/2023]
Abstract
BACKGROUND Perioperative hypersensitivity (POH) reactions constitute a significant clinical and diagnostic challenge. A transient increase in serum tryptase during POH reflects mast cell activation (MCA) and helps to recognize an underlying hypersensitivity mechanism. OBJECTIVE To determine the diagnostic performance of different tryptase decision thresholds based on single and paired measurements to document MCA in suspected POH. METHODS Acute serum tryptase (aST) and baseline serum tryptase (bST) samples were obtained from patients referred to our outpatients clinic because of clinical POH. Tryptase samples from controls were obtained before induction (Tt0) and 1.5 hours after induction (Tt1) in uneventful anesthesia. Different cutoff points for tryptase increase over bST and the percentage increase in tryptase (%T) were calculated and compared with existing thresholds: aST > [1.2 × (bST) + 2] (consensus formula), aST higher than 11.4 ng/mL, and aST higher than 14 ng/mL. RESULTS Patients with POH had higher bST and aST levels compared with controls (respectively 5.15 vs 2.28 ng/mL for bST and 20.30 vs 1.92 ng/mL for aST). The consensus formula and a tryptase increase over bST of greater than or equal to 3.2 ng/mL held the highest accuracies to document MCA in POH (respectively 81% and 82%). A bST of higher than 8 ng/mL was present in 4% of controls, 5% of patients with grade 1 POH, 24% of patients with grade 2 POH, 15% of patients with grade 3 POH, and 17% of patients with grade 4 POH. CONCLUSIONS Our data endorse the consensus formula for detection of MCA in POH. Furthermore, it shows that a bST of higher than 8 ng/mL was associated with occurrence of anaphylaxis.
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Affiliation(s)
- Didier G Ebo
- Faculty of Medicine and Health Sciences, Department of Immunology, Allergology, Rheumatology and the Infla-Med Centre of Excellence, University of Antwerp, Antwerp, Belgium; Department of Immunology, Allergology, Rheumatology, Antwerp University Hospital, Antwerp, Belgium; AZ Jan Palfijn Gent, Department of Immunology and Allergology, Ghent, Belgium.
| | - Leander P De Puysseleyr
- Faculty of Medicine and Health Sciences, Department of Immunology, Allergology, Rheumatology and the Infla-Med Centre of Excellence, University of Antwerp, Antwerp, Belgium; Department of Immunology, Allergology, Rheumatology, Antwerp University Hospital, Antwerp, Belgium
| | - Athina L Van Gasse
- Faculty of Medicine and Health Sciences, Department of Immunology, Allergology, Rheumatology and the Infla-Med Centre of Excellence, University of Antwerp, Antwerp, Belgium; Department of Immunology, Allergology, Rheumatology, Antwerp University Hospital, Antwerp, Belgium; Faculty of Medicine and Health Sciences, Department of Paediatrics and the Infla-Med Centre of Excellence, University of Antwerp, Antwerp, Belgium; Department of Paediatrics, Antwerp University Hospital, Antwerp, Belgium
| | - Jessy Elst
- Faculty of Medicine and Health Sciences, Department of Immunology, Allergology, Rheumatology and the Infla-Med Centre of Excellence, University of Antwerp, Antwerp, Belgium; Department of Immunology, Allergology, Rheumatology, Antwerp University Hospital, Antwerp, Belgium
| | - Marie-Line van der Poorten
- Faculty of Medicine and Health Sciences, Department of Immunology, Allergology, Rheumatology and the Infla-Med Centre of Excellence, University of Antwerp, Antwerp, Belgium; Department of Immunology, Allergology, Rheumatology, Antwerp University Hospital, Antwerp, Belgium; Faculty of Medicine and Health Sciences, Department of Paediatrics and the Infla-Med Centre of Excellence, University of Antwerp, Antwerp, Belgium; Department of Paediatrics, Antwerp University Hospital, Antwerp, Belgium
| | - Margaretha A Faber
- Faculty of Medicine and Health Sciences, Department of Immunology, Allergology, Rheumatology and the Infla-Med Centre of Excellence, University of Antwerp, Antwerp, Belgium; Department of Immunology, Allergology, Rheumatology, Antwerp University Hospital, Antwerp, Belgium
| | - Christel Mertens
- Faculty of Medicine and Health Sciences, Department of Immunology, Allergology, Rheumatology and the Infla-Med Centre of Excellence, University of Antwerp, Antwerp, Belgium; Department of Immunology, Allergology, Rheumatology, Antwerp University Hospital, Antwerp, Belgium
| | - Michel Van Houdt
- Faculty of Medicine and Health Sciences, Department of Immunology, Allergology, Rheumatology and the Infla-Med Centre of Excellence, University of Antwerp, Antwerp, Belgium; Department of Immunology, Allergology, Rheumatology, Antwerp University Hospital, Antwerp, Belgium
| | - Margo M Hagendorens
- Faculty of Medicine and Health Sciences, Department of Immunology, Allergology, Rheumatology and the Infla-Med Centre of Excellence, University of Antwerp, Antwerp, Belgium; Department of Immunology, Allergology, Rheumatology, Antwerp University Hospital, Antwerp, Belgium; Faculty of Medicine and Health Sciences, Department of Paediatrics and the Infla-Med Centre of Excellence, University of Antwerp, Antwerp, Belgium; Department of Paediatrics, Antwerp University Hospital, Antwerp, Belgium
| | - Luc Sermeus
- Department of Anaesthesia, Antwerp University Hospital, Antwerp, Belgium
| | - Joana Vitte
- Aix-Marseille University, IRD, APHM, MEPHI, IHU Méditerranée Infection, Marseille, France; IDESP, INSERM, University of Montpellier, Montpellier, France; Laboratoire d'Immunologie, CHU de Nîmes, Nîmes, France
| | - Michel Moise
- Aix-Marseille University, IRD, APHM, MEPHI, IHU Méditerranée Infection, Marseille, France; Laboratoire d'Immunologie, CHU de Nîmes, Nîmes, France
| | - Lene H Garvey
- Allergy Clinic, Department of Dermatology and Allergy, Gentofte Hospital, Gentofte, Denmark; Department of Clinical Medicine, Ha, Denmark
| | - Mariana C Castells
- Division of Allergy and Clinical Immunology, Brigham and Women's Hospital, Boston, Mass; Harvard Medical School, Boston, Mass
| | - Charles Tacquard
- Nouvel Hôpital Civil, hôpitaux universitaires de Strasbourg, service d'anesthésie-réanimation chirurgicale, Strasbourg, France
| | - Paul-Michel Mertes
- Nouvel Hôpital Civil, hôpitaux universitaires de Strasbourg, service d'anesthésie-réanimation chirurgicale, Strasbourg, France
| | - Lawrence B Schwartz
- Department of Internal Medicine, Division of Rheumatology, Allergy & Immunologie, Virginia Commonwealth University, Richmond, Va
| | - Vito Sabato
- Faculty of Medicine and Health Sciences, Department of Immunology, Allergology, Rheumatology and the Infla-Med Centre of Excellence, University of Antwerp, Antwerp, Belgium; Department of Immunology, Allergology, Rheumatology, Antwerp University Hospital, Antwerp, Belgium; AZ Jan Palfijn Gent, Department of Immunology and Allergology, Ghent, Belgium
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Vitte J, Sabato V, Tacquard C, Garvey LH, Michel M, Mertes PM, Ebo DG, Schwartz LB, Castells MC. Use and Interpretation of Acute and Baseline Tryptase in Perioperative Hypersensitivity and Anaphylaxis. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY-IN PRACTICE 2021; 9:2994-3005. [PMID: 33746087 DOI: 10.1016/j.jaip.2021.03.011] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 03/05/2021] [Accepted: 03/11/2021] [Indexed: 12/18/2022]
Abstract
Paired acute and baseline serum or plasma tryptase sampling and determination have recently been included as a mechanistic approach in the diagnostic and management guidelines of perioperative immediate hypersensitivity and anaphylaxis. The timing of this paired sampling is clearly defined in international consensus statements, with the optimal window for acute tryptase sampling between 30 minutes and 2 hours after the initiation of symptoms, whereas baseline tryptase should be measured in a sample collected before the event (preop) or at least 24 hours after all signs and symptoms have resolved. A transient elevation of the acute tryptase level greater than [2 + (1.2 × baseline tryptase level)] supports the involvement and activation of mast cells. Here, we provide the clinical, pathophysiological, and technical rationale for the procedure and interpretation of paired acute and baseline tryptase. Clinical examples, up-to-date knowledge of hereditary α-tryptasemia as a frequent cause of baseline tryptase of 7 μg/L and higher, mastocytosis, other clonal myeloid disorders, cardiovascular or renal failure, and technical improvements resulting in continued lowering of the 95th percentile value are discussed. Clues for improved management of perioperative immediate hypersensitivity and anaphylaxis include (1) sustained dissemination and implementation of updated guidelines; (2) preoperative sample storage for deferred analysis; (3) referral for thorough allergy investigation, screening for mast cell-related disorders, and recommendations for future anesthetic procedures; and (4) sustained collaboration between anesthesiologists, immunologists, and allergists.
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Affiliation(s)
- Joana Vitte
- Aix-Marseille Univ, IRD, APHM, MEPHI, Marseille, France; IHU Méditerranée Infection, Marseille, France; IDESP, INSERM UMR UA11, University of Montpellier, Montpellier, France
| | - Vito Sabato
- Faculty of Medicine and Health Sciences, Department of Immunology, Allergology, Rheumatology and the Infla-Med Centre of Excellence, University of Antwerp, Antwerp, Belgium; Immunology, Allergology, Rheumatology, Antwerp University Hospital, Antwerp, Belgium; AZ Jan Palfijn Gent, Department of Immunology and Allergology, Ghent, Belgium
| | - Charles Tacquard
- Nouvel Hôpital Civil, hôpitaux universitaires de Strasbourg, service d'anesthésie-réanimation chirurgicale, 1, place de l'Hôpital, Strasbourg, France
| | - Lene H Garvey
- Allergy Clinic, Department of Dermatology and Allergy, Gentofte Hospital, Gentofte, Denmark; Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Moïse Michel
- Aix-Marseille Univ, IRD, APHM, MEPHI, Marseille, France; IHU Méditerranée Infection, Marseille, France; Laboratoire d'Immunologie, CHU de Nîmes, Nîmes, France
| | - Paul-Michel Mertes
- Nouvel Hôpital Civil, hôpitaux universitaires de Strasbourg, service d'anesthésie-réanimation chirurgicale, 1, place de l'Hôpital, Strasbourg, France
| | - Didier G Ebo
- Faculty of Medicine and Health Sciences, Department of Immunology, Allergology, Rheumatology and the Infla-Med Centre of Excellence, University of Antwerp, Antwerp, Belgium; Immunology, Allergology, Rheumatology, Antwerp University Hospital, Antwerp, Belgium; AZ Jan Palfijn Gent, Department of Immunology and Allergology, Ghent, Belgium
| | - Lawrence B Schwartz
- Department of Internal Medicine, Division of Rheumatology, Allergy & Immunology, Virginia Commonwealth University, Richmond, Va
| | - Mariana C Castells
- Division of Allergy and Clinical Immunology, Brigham and Women's Hospital, Boston, Mass; Harvard Medical School, Boston, Mass.
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Owens E, Tan KS, Ellis R, Del Vecchio S, Humphries T, Lennan E, Vesey D, Healy H, Hoy W, Gobe G. Development of a Biomarker Panel to Distinguish Risk of Progressive Chronic Kidney Disease. Biomedicines 2020; 8:E606. [PMID: 33327377 PMCID: PMC7764886 DOI: 10.3390/biomedicines8120606] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 12/09/2020] [Accepted: 12/10/2020] [Indexed: 12/12/2022] Open
Abstract
Chronic kidney disease (CKD) patients typically progress to kidney failure, but the rate of progression differs per patient or may not occur at all. Current CKD screening methods are sub-optimal at predicting progressive kidney function decline. This investigation develops a model for predicting progressive CKD based on a panel of biomarkers representing the pathophysiological processes of CKD, kidney function, and common CKD comorbidities. Two patient cohorts are utilised: The CKD Queensland Registry (n = 418), termed the Biomarker Discovery cohort; and the CKD Biobank (n = 62), termed the Predictive Model cohort. Progression status is assigned with a composite outcome of a ≥30% decline in eGFR from baseline, initiation of dialysis, or kidney transplantation. Baseline biomarker measurements are compared between progressive and non-progressive patients via logistic regression. In the Biomarker Discovery cohort, 13 biomarkers differed significantly between progressive and non-progressive patients, while 10 differed in the Predictive Model cohort. From this, a predictive model, based on a biomarker panel of serum creatinine, osteopontin, tryptase, urea, and eGFR, was calculated via linear discriminant analysis. This model has an accuracy of 84.3% when predicting future progressive CKD at baseline, greater than eGFR (66.1%), sCr (67.7%), albuminuria (53.2%), or albumin-creatinine ratio (53.2%).
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Affiliation(s)
- Evan Owens
- NHMRC CKD CRE (CKD.QLD), The University of Queensland, Brisbane 4067, Australia; (E.O.); (K.-S.T.); (H.H.)
- Faculty of Medicine, The University of Queensland, Brisbane 4067, Australia; (R.E.); (S.D.V.); (T.H.); (D.V.)
- Kidney Disease Research Collaborative, Translational Research Institute, Princess Alexandra Hospital, The University of Queensland, Brisbane 4102, Australia
| | - Ken-Soon Tan
- NHMRC CKD CRE (CKD.QLD), The University of Queensland, Brisbane 4067, Australia; (E.O.); (K.-S.T.); (H.H.)
- Renal Medicine, Metro South Hospital and Health Service, Logan Hospital, Meadowbrook 4131, Australia;
| | - Robert Ellis
- Faculty of Medicine, The University of Queensland, Brisbane 4067, Australia; (R.E.); (S.D.V.); (T.H.); (D.V.)
- Kidney Disease Research Collaborative, Translational Research Institute, Princess Alexandra Hospital, The University of Queensland, Brisbane 4102, Australia
| | - Sharon Del Vecchio
- Faculty of Medicine, The University of Queensland, Brisbane 4067, Australia; (R.E.); (S.D.V.); (T.H.); (D.V.)
- Kidney Disease Research Collaborative, Translational Research Institute, Princess Alexandra Hospital, The University of Queensland, Brisbane 4102, Australia
| | - Tyrone Humphries
- Faculty of Medicine, The University of Queensland, Brisbane 4067, Australia; (R.E.); (S.D.V.); (T.H.); (D.V.)
- Kidney Disease Research Collaborative, Translational Research Institute, Princess Alexandra Hospital, The University of Queensland, Brisbane 4102, Australia
| | - Erica Lennan
- Renal Medicine, Metro South Hospital and Health Service, Logan Hospital, Meadowbrook 4131, Australia;
| | - David Vesey
- Faculty of Medicine, The University of Queensland, Brisbane 4067, Australia; (R.E.); (S.D.V.); (T.H.); (D.V.)
- Kidney Disease Research Collaborative, Translational Research Institute, Princess Alexandra Hospital, The University of Queensland, Brisbane 4102, Australia
| | - Helen Healy
- NHMRC CKD CRE (CKD.QLD), The University of Queensland, Brisbane 4067, Australia; (E.O.); (K.-S.T.); (H.H.)
- Faculty of Medicine, The University of Queensland, Brisbane 4067, Australia; (R.E.); (S.D.V.); (T.H.); (D.V.)
- Kidney Health Service, Royal Brisbane and Women’s Hospital, Brisbane 4029, Australia
| | - Wendy Hoy
- NHMRC CKD CRE (CKD.QLD), The University of Queensland, Brisbane 4067, Australia; (E.O.); (K.-S.T.); (H.H.)
- Faculty of Medicine, The University of Queensland, Brisbane 4067, Australia; (R.E.); (S.D.V.); (T.H.); (D.V.)
- Centre for Chronic Disease, Faculty of Medicine, The University of Queensland, Brisbane 4067, Australia
| | - Glenda Gobe
- NHMRC CKD CRE (CKD.QLD), The University of Queensland, Brisbane 4067, Australia; (E.O.); (K.-S.T.); (H.H.)
- Faculty of Medicine, The University of Queensland, Brisbane 4067, Australia; (R.E.); (S.D.V.); (T.H.); (D.V.)
- Kidney Disease Research Collaborative, Translational Research Institute, Princess Alexandra Hospital, The University of Queensland, Brisbane 4102, Australia
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Lobbes H, Reynaud Q, Mainbourg S, Lega JC, Durieu I, Durupt S. [Tryptase: A practical guide for the physician]. Rev Med Interne 2020; 41:748-755. [PMID: 32712042 DOI: 10.1016/j.revmed.2020.06.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 05/24/2020] [Accepted: 06/07/2020] [Indexed: 12/19/2022]
Abstract
Tryptase is the most abundant endopeptidase released by mast cells degranulation, involved in many pro and anti-inflammatory processes. Normal serum tryptase range is 0-11.4 μg/L. Tryptase is a useful diagnostic tool for anaphylaxis, systemic mastocytosis (SM) and mast cell activation syndrome (MCAS), where specific threshold values must be used. SM diagnosis criteria include evidence of dense mast cell infiltrate either in the bone marrow or the affected organ (such as skin), presence of KIT D816V mutation and elevated serum tryptase level (>20 μg/L). In SM, tryptase level is correlated with the burden of mast cells in bone marrow. MCAS should be considered in case of severe and recurrent typical clinical signs of systemic mast cell activation involving at least two organs, associated with an increase in serum tryptase level of 20% + 2 μg/L from the individual's baseline. Anaphylaxis is the most severe among hypersensitivity reactions. A clonal mast cell disorder is a central question in anaphylaxis and appropriate explorations should be conducted in these patients. Triggers for anaphylactic reactions vary significantly in the general population and in patients with MS or MCAS. Finally, physicians must be aware of the many pathological and physiological situations that affect tryptase levels.
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Affiliation(s)
- H Lobbes
- Service de Médecine Interne, Hôpital Estaing, CHU de Clermont-Ferrand, 1 Place Lucie et Raymond Aubrac, 63000 Clermont-Ferrand, France; Service de Médecine Interne et Vasculaire, Hôpital Lyon Sud, Hospices Civils de Lyon, 165 Chemin du grand Revoyet, 69310 Pierre-Bénite, France.
| | - Q Reynaud
- Service de Médecine Interne et Vasculaire, Hôpital Lyon Sud, Hospices Civils de Lyon, 165 Chemin du grand Revoyet, 69310 Pierre-Bénite, France
| | - S Mainbourg
- Service de Médecine Interne et Vasculaire, Hôpital Lyon Sud, Hospices Civils de Lyon, 165 Chemin du grand Revoyet, 69310 Pierre-Bénite, France
| | - J C Lega
- Service de Médecine Interne et Vasculaire, Hôpital Lyon Sud, Hospices Civils de Lyon, 165 Chemin du grand Revoyet, 69310 Pierre-Bénite, France
| | - I Durieu
- Service de Médecine Interne et Vasculaire, Hôpital Lyon Sud, Hospices Civils de Lyon, 165 Chemin du grand Revoyet, 69310 Pierre-Bénite, France
| | - S Durupt
- Service de Médecine Interne et Vasculaire, Hôpital Lyon Sud, Hospices Civils de Lyon, 165 Chemin du grand Revoyet, 69310 Pierre-Bénite, France
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Usefulness of testing for hereditary alpha tryptasemia in symptomatic patients with elevated tryptase. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY-IN PRACTICE 2020; 8:2066-2067. [DOI: 10.1016/j.jaip.2020.01.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 12/26/2019] [Accepted: 01/06/2020] [Indexed: 12/18/2022]
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Lee AYS. Elevated Serum Tryptase in Non-Anaphylaxis Cases: A Concise Review. Int Arch Allergy Immunol 2020; 181:357-364. [PMID: 32126554 DOI: 10.1159/000506199] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2019] [Accepted: 01/27/2020] [Indexed: 11/19/2022] Open
Abstract
One of the most important blood tests in the field of allergy, mast cell tryptase has numerous diagnostic uses, particularly for anaphylactic reactions and for the diagnosis of mastocytosis. However, there are numerous other non-anaphylactic conditions where clinicians may see elevated serum tryptase (hypertryptasemia) and the practicing clinician ought to be aware of these important differential diagnoses. Such conditions include systemic mastocytosis, hematological malignancies, and chronic kidney disease. This article provides a comprehensive, updated summary on the variety of non-anaphylactic conditions where hypertryptasemia may be seen.
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Affiliation(s)
- Adrian Y S Lee
- Department of Allergy/Clinical Immunology and SA Pathology, Flinders Medical Centre, Bedford Park, South Australia, Australia, .,College of Medicine and Public Health, Flinders University, Bedford Park, South Australia, Australia,
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12
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Gastaminza G, Lafuente A, Goikoetxea MJ, D'Amelio CM, Bernad-Alonso A, Vega O, Martinez-Molina JA, Ferrer M, Nuñez-Cordoba JM. Improvement of the Elevated Tryptase Criterion to Discriminate IgE- From Non-IgE-Mediated Allergic Reactions. Anesth Analg 2019; 127:414-419. [PMID: 29189281 DOI: 10.1213/ane.0000000000002656] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND Differentiating between immunoglobulin E (IgE)-dependent and IgE-independent hypersensitivity reactions may improve the etiologic orientation and clinical management of patients with allergic reactions in the anesthesia setting. Serum tryptase levels may be useful to discriminate the immune mechanism of allergic reactions, but the diagnostic accuracy and optimal cutpoint remain unclear.We aimed to compare the diagnostic accuracy of tryptase during reaction (TDR) alone and the TDR/basal tryptase (TDR/BT) ratio for discriminating IgE- from non-IgE-mediated allergic reactions, and to estimate the best cut point for these indicators. METHODS We included 111 patients (45% men; aged 3-99 years) who had experienced an allergic reaction, even though the allergic reaction could be nonanaphylactic. Allergy tests were performed to classify the reaction as an IgE- or non-IgE-mediated one. The area under the curve (AUC) of the receiver operating characteristic analysis was performed to estimate the discriminative ability of TDR and TDR/BT ratio. RESULTS An IgE-mediated reaction was diagnosed in 49.5% of patients, and 56% of patients met anaphylaxis criteria. The median (quartiles) TDR for the IgE-mediated reactions was 8.0 (4.9-19.6) and 5.1 (3.5-8.1) for the non-IgE-mediated (P = .022). The median (quartiles) TDR/BT ratio was 2.7 (1.7-4.5) in IgE-mediated and 1.1 (1.0-1.6) in non-IgE-mediated reactions (P < .001). The TDR/BT ratio showed the greatest ability to discriminate IgE- from non-IgE-mediated reactions compared to TDR (AUC TDR/BT = 0.79 [95% confidence interval (CI), 0.70-0.88] and AUC TDR = 0.66 [95% CI, 0.56-0.76]; P = .001). The optimal cut point for TDR/BT (maximization of the sum of the sensitivity and specificity) was 1.66 (95% CI, 1.1-2.2). CONCLUSIONS The TDR/BT ratio showed a significantly better discriminative ability than TDR to discriminate IgE- from non-IgE-mediated allergic reactions. An optimal TDR/BT ratio threshold of approximately 1.66 may be useful in clinical practice to classify allergic reactions as IgE- or non-IgE-mediated.
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Affiliation(s)
| | | | | | | | | | - Olga Vega
- From the Departments of Allergology and Clinical Immunology
| | | | - Marta Ferrer
- From the Departments of Allergology and Clinical Immunology
| | - Jorge M Nuñez-Cordoba
- Research Support Service, Central Clinical Trials Unit, Clínica Universidad de Navarra, Pamplona, Spain
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13
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Valent P, Bonadonna P, Hartmann K, Broesby-Olsen S, Brockow K, Butterfield JH, Triggiani M, Lyons JJ, Oude Elberink JNG, Arock M, Metcalfe DD, Akin C. Why the 20% + 2 Tryptase Formula Is a Diagnostic Gold Standard for Severe Systemic Mast Cell Activation and Mast Cell Activation Syndrome. Int Arch Allergy Immunol 2019; 180:44-51. [PMID: 31256161 DOI: 10.1159/000501079] [Citation(s) in RCA: 80] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Accepted: 05/20/2019] [Indexed: 12/16/2022] Open
Abstract
Mast cell activation syndrome (MCAS) is a condition characterized by recurrent episodes of clinically relevant, systemic, severe reactions to mast cell (MC)-derived mediators released in the context of anaphylaxis or another acute MC-related event. It is important to document MC involvement in these reactions in order to establish the diagnosis MCAS. The most specific and reliable marker of systemic MC activation is an acute and substantial event-related (transient) increase in the serum tryptase level over the individual's baseline value. However, the baseline level of tryptase varies depending on the underlying disease and the genetic background. For example, an estimated 3-5% of healthy individuals exhibit duplications or multiple copies of the TPSAB1 gene encoding for alpha-tryptase, and over 30% of all patients with myeloid neoplasms, including mastocytosis, have elevated basal tryptase levels. Therefore, it is of utmost importance to adjust the event-related diagnostic (MCAS-confirming) increase in tryptase over the individual baseline in a robust approach. To address this challenge, the 20% + 2 formula was proposed by the consensus group in 2012. Since then, this approach has been validated in clinical practice by independent groups and found to be sound. In the current article, we discuss the emerging importance and value of the 20% + 2 formula in clinical practice and its role as a criterion of severe systemic MC activation and MCAS.
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Affiliation(s)
- Peter Valent
- Department of Internal Medicine I, Division of Hematology and Hemostaseology, and Ludwig Boltzmann Institute for Hematology and Oncology, Medical University of Vienna, Vienna, Austria,
| | | | - Karin Hartmann
- Division of Allergy, Department of Dermatology, University of Basel, Basel, Switzerland
| | - Sigurd Broesby-Olsen
- Department of Dermatology and Allergy Centre, Odense University Hospital, Odense, Denmark
| | - Knut Brockow
- Department of Dermatology and Allergy Biederstein, Technical University of Munich, Munich, Germany
| | | | - Massimo Triggiani
- Division of Allergy and Clinical Immunology, University of Salerno, Salerno, Italy
| | - Jonathan J Lyons
- Laboratory of Allergic Diseases, NIAID, NIH, Bethesda, Maryland, USA
| | - Joanna N G Oude Elberink
- Department of Allergology, University Medical Center of Groningen, University of Groningen, Groningen, The Netherlands
| | - Michel Arock
- Department of Hematological Biology, Pitié-Salpêtrière Hospital, Pierre et Marie Curie University (UPMC), Paris, France
| | - Dean D Metcalfe
- Laboratory of Allergic Diseases, NIAID, NIH, Bethesda, Maryland, USA
| | - Cem Akin
- Division of Allergy and Clinical Immunology, University of Michigan, Ann Arbor, Michigan, USA
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Beck SC, Wilding T, Buka RJ, Baretto RL, Huissoon AP, Krishna MT. Biomarkers in Human Anaphylaxis: A Critical Appraisal of Current Evidence and Perspectives. Front Immunol 2019; 10:494. [PMID: 31024519 PMCID: PMC6459955 DOI: 10.3389/fimmu.2019.00494] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Accepted: 02/25/2019] [Indexed: 12/12/2022] Open
Abstract
Anaphylaxis is a type I hypersensitivity reaction that is potentially fatal if not promptly treated. It is a clinical diagnosis, although measurement of serial serum total mast cell tryptase (MCT) is gold standard and may help differentiate anaphylaxis from its mimics. The performance characteristics of MCT assays in anaphylaxis has been variable in previous studies, due to multiple factors including differences in the definition of anaphylaxis, methods of MCT interpretation, clinical setting of anaphylaxis, causative agents, and timing of blood sample. An international consensus equation for MCT to interpret mast cell activation has been proposed and recently validated in the context of peri-operative anaphylaxis during general anesthesia. There has been an interest in the detection of newer biomarkers in anaphylaxis including platelet activation factor (PAF), chymase, carboxypeptidase A3, dipeptidyl peptidase I (DPPI), basogranulin, and CCL-2. The key determinants of an ideal biomarker in anaphylaxis are half-life, sample handling and processing requirements, and cost. There may be a role for metabolomics and systems biology in the exploration of novel biomarkers in anaphylaxis. Future studies applying these approaches might provide greater insight into factors determining severity, clinical risk stratification, identification of mast cell disorders and improving our understanding of this relatively complex acute immunological condition. Post mortem MCT evaluation is used in Forensic Medicine during autopsy for cases involving sudden death or suspected anaphylaxis. Interpretation of post mortem MCT is challenging since there is limited published evidence and the test is confounded by multiple variables largely linked to putrefaction and site of sampling. Thus, there is no international consensus on a reference range. In this state of the art review, we will focus on the practical challenges in the laboratory diagnosis of anaphylaxis and critically appraise (a) performance characteristics of MCT in anaphylaxis in different clinical scenarios (b) the role for novel biomarkers and (c) post mortem MCT and its role in fatal anaphylaxis.
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Affiliation(s)
- Sarah C Beck
- Department of Allergy and Immunology, Birmingham Heartlands Hospital, University Hospitals Birmingham NHS Foundation Trust, Birmingham, United Kingdom
| | - Thomas Wilding
- Department of Allergy and Immunology, Birmingham Heartlands Hospital, University Hospitals Birmingham NHS Foundation Trust, Birmingham, United Kingdom
| | - Richard J Buka
- Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, United Kingdom
| | - Richard L Baretto
- Department of Allergy and Immunology, Birmingham Heartlands Hospital, University Hospitals Birmingham NHS Foundation Trust, Birmingham, United Kingdom
| | - Aarnoud P Huissoon
- Department of Allergy and Immunology, Birmingham Heartlands Hospital, University Hospitals Birmingham NHS Foundation Trust, Birmingham, United Kingdom
| | - Mamidipudi T Krishna
- Department of Allergy and Immunology, Birmingham Heartlands Hospital, University Hospitals Birmingham NHS Foundation Trust, Birmingham, United Kingdom.,Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, United Kingdom
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15
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Nydegger U, Lung T, Risch L, Risch M, Medina Escobar P, Bodmer T. Inflammation Thread Runs across Medical Laboratory Specialities. Mediators Inflamm 2016; 2016:4121837. [PMID: 27493451 PMCID: PMC4963559 DOI: 10.1155/2016/4121837] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Accepted: 05/31/2016] [Indexed: 12/16/2022] Open
Abstract
We work on the assumption that four major specialities or sectors of medical laboratory assays, comprising clinical chemistry, haematology, immunology, and microbiology, embraced by genome sequencing techniques, are routinely in use. Medical laboratory markers for inflammation serve as model: they are allotted to most fields of medical lab assays including genomics. Incessant coding of assays aligns each of them in the long lists of big data. As exemplified with the complement gene family, containing C2, C3, C8A, C8B, CFH, CFI, and ITGB2, heritability patterns/risk factors associated with diseases with genetic glitch of complement components are unfolding. The C4 component serum levels depend on sufficient vitamin D whilst low vitamin D is inversely related to IgG1, IgA, and C3 linking vitamin sufficiency to innate immunity. Whole genome sequencing of microbial organisms may distinguish virulent from nonvirulent and antibiotic resistant from nonresistant varieties of the same species and thus can be listed in personal big data banks including microbiological pathology; the big data warehouse continues to grow.
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Affiliation(s)
- Urs Nydegger
- Labormedizinisches Zentrum Dr. Risch and Kantonsspital Graubünden, 7000 Chur, Switzerland
| | - Thomas Lung
- Labormedizinisches Zentrum Dr. Risch and Kantonsspital Graubünden, 7000 Chur, Switzerland
| | - Lorenz Risch
- Labormedizinisches Zentrum Dr. Risch and Kantonsspital Graubünden, 7000 Chur, Switzerland
| | - Martin Risch
- Labormedizinisches Zentrum Dr. Risch and Kantonsspital Graubünden, 7000 Chur, Switzerland
| | - Pedro Medina Escobar
- Labormedizinisches Zentrum Dr. Risch and Kantonsspital Graubünden, 7000 Chur, Switzerland
| | - Thomas Bodmer
- Labormedizinisches Zentrum Dr. Risch and Kantonsspital Graubünden, 7000 Chur, Switzerland
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