ArticleThe World Allergy Organization journal2020
Standardization of a colorimetric technique for determination of enzymatic activity of diamine oxidase (DAO) and its application in patients with clinical diagnosis of histamine intolerance.
Article in The World Allergy Organization journal, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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10 citing papers in PubMed, 20 citations in OpenAlex.
- Histamine plasma levels from dietary histidine/histamine intake correlate with CGRP in trigeminal tissues.The journal of headache and pain · 2025Article
- Histamine Metabolism in IBD: Towards Precision Nutrition.Nutrients · 2025Review
- Therapeutic efficacy of fecal microbiota transplantation in severe food intolerance: a case report.Frontiers in nutrition · 2025Article
- Exploring the Relationship between Diamine Oxidase and Psychotropic Medications in Fibromyalgia Treatment, Finding No Reduction in Diamine Oxidase Levels and Activity except with Citalopram.Journal of clinical medicine · 2024Article
- Diamine Oxidase Interactions with Anti-Inflammatory and Anti-Migraine Medicines in the Treatment of Migraine.Journal of clinical medicine · 2023Article
- Ginseng Stem-and-Leaf Saponins Mitigate Chlorpyrifos-Evoked Intestinal Toxicity In Vivo and In Vitro: Oxidative Stress, Inflammatory Response and Apoptosis.International journal of molecular sciences · 2023Article
- Interaction of Diamine Oxidase with Psychostimulant Drugs for ADHD Management.Journal of clinical medicine · 2023Article
- Manganese cobalt-MOF@carbon nanofiber-based non-enzymatic histamine sensor for the determination of food freshness.Analytical and bioanalytical chemistry · 2023Article
- Electrochemical (Bio)Sensing Devices for Human-Microbiome-Related Biomarkers.Sensors (Basel, Switzerland) · 2023Review
- Histamine Intolerance-A Kind of Pseudoallergic Reaction.Biomolecules · 2022Review
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9 authors at 1 institution in 1 country.
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Abstract
backgroundDiamine Oxidase (DAO) has an essential role for degradation of exogenous histamine in the intestine; thus, histamine intolerance (HI) mainly has been correlated to a low concentration and/or activity of this enzyme. The objective of the study was to standardize a colorimetric technique to measure the enzymatic activity (function) of hDAO to then apply it to a series of 22 patients with a clinical diagnosis of HI.
methodsFor the standardization variables such as volume and type of sample, incubation time, wavelength of maximum absorption, types of substrates, and concentration of oxidized ascorbate were evaluated. Then the activity and concentration of DAO was determined in 22 patients diagnosed with HI and 22 healthy subjects.
resultsThe mean of serum DAO concentration in the 22 patients was of 9.268 ± 1.124 U/mL. The mean of serum DAO concentration in the 22 controls was of 20.710 ± 2.509 U/mL, being significantly higher (P value 0.0002) the mean of the samples. The mean of serum DAO activity of the patients was of 1.143 ± 0.085 U/L and the controls was 1.533 ± 0.119 U/L, significantly greater than the patients (P value 0.011). In addition, the sensitivity of both techniques was 0.63. In the measuring of DAO concentration the specificity was 0.9, constituting a good diagnostic test, especially to rule out the true negatives. The determination of DAO activity had a specificity of 0.68.
conclusionsAlthough we used a small number of patients and controls and the absorbance values were lower than expected, statistically significant differences were found in the levels of concentration and DAO activity between the patients with histamine intolerance and the controls. Therefore, the measuring of DAO concentration and DAO activity is a good diagnostic strategy for study suspect cases of HI. The simultaneous use of both assays allows to reduce positive and negative false results, for example, patients with normal DAO levels that could present a dysfunction in the activity of this enzyme.
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