The Utility of Measuring Urinary Metabolites of Mast Cell Mediators in Systemic Mastocytosis and Mast Cell Activation Syndrome.

The Journal of Allergy and Clinical Immunology. in Practice
Joseph H Butterfield, Catherine R Weiler

Abstract

Mast cells (MCs) leave evidence of their presence and activation. Aside from increased numbers of MCs in tissues, this evidence includes detecting elevated serum levels of tryptase and discovering increased excretion of urinary metabolites of prostaglandin (PG) D2, leukotriene (LT) C4, and/or histamine. The importance of measuring these nontryptase mediator metabolites has largely gone unnoticed. We reviewed the utility of quantitating urinary levels of MC mediator metabolites in systemic mastocytosis (SM) and MC activation disorders and summarized the relative production of these mediators by MCs and other cell types. Quantitation of urinary n-methyl histamine, 2,3-dinor-11βPGF2α, and LTE4 offers a simple, noninvasive avenue to monitor their constitutive release as well as contemporaneous discharge during MC activation as well as supporting a diagnosis of SM. These increases can occur independently of or in addition to raised levels of tryptase. Quantitation of these mediator metabolites potentially offers targets for therapeutic intervention. Synthesis of PGD2, a product nearly exclusively of MCs, can be controlled with aspirin, histamine increase by H1 and H2 receptor blockade, and LTC4 by a 5-LO inhibitor or LT receptor ant...Continue Reading

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Citations

Dec 3, 2020·International Journal of Molecular Sciences·Peter ValentDean D Metcalfe
Mar 23, 2021·The Journal of Allergy and Clinical Immunology·Jason GotlibCem Akin
May 25, 2021·Prostaglandins & Other Lipid Mediators·Joseph H Butterfield, Ravinder J Singh
Jun 25, 2021·The Journal of Allergy and Clinical Immunology. in Practice·Theo GülenPeter Valent
Jul 4, 2021·Annals of Allergy, Asthma & Immunology : Official Publication of the American College of Allergy, Asthma, & Immunology·Matthew P Giannetti

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