Summary of Study ST001655
This data is available at the NIH Common Fund's National Metabolomics Data Repository (NMDR) website, the Metabolomics Workbench, https://www.metabolomicsworkbench.org, where it has been assigned Project ID PR001061. The data can be accessed directly via it's Project DOI: 10.21228/M8JQ37 This work is supported by NIH grant, U2C- DK119886.
See: https://www.metabolomicsworkbench.org/about/howtocite.php
This study contains a large results data set and is not available in the mwTab file. It is only available for download via FTP as data file(s) here.
| Study ID | ST001655 |
| Study Title | Characterization of anaphylaxis reveals different metabolic changes depending on severity and triggers - NMR (part-I) |
| Study Summary | Background: Despite its increasing incidence, the underlying molecular processes of anaphylaxis remain unclear and there are not known biomarkers for appropriate diagnosis. The mechanism associated to the reactions still needs to be clarified in humans. The rapid onset and potentially fatal outcome in the absence of managed treatment, prevent its study and prompt obvious technical and ethical implications. Methods: Twenty episodes of anaphylaxis were analyzed. Sera was collected at different times: during the acute phase (T1), the recovery phase (T2) and around 2-3 months after the anaphylactic reaction (T0). The analysis included untargeted metabolomics combining liquid chromatography coupled to mass spectrometry (LC-MS) and proton-nuclear magnetic resonance (1H-NMR). Reactions were classified according to the trigger (food and/or drug) and severity (moderate and severe). Results: “Food T1 vs T2” and “moderate T1 vs T2” anaphylaxis comparisons showed clear metabolic patterns during the onset of an anaphylactic reaction, which differed from those induced by drugs, food+drug or severe anaphylaxis “T1 vs T2”. Moreover, the model of food anaphylaxis was able to distinguish the well-characterized IgE (beta-lactam) from non-IgE- mediated anaphylaxis (NSAIDs), suggesting a differential metabolic pathway associated with the mechanism of action. Moreover, metabolic differences between “moderate vs severe” at T1 and T0 were studied. Among the metabolites, glucose, lipids, cortisol, betaine and oleamide were observed altered. Conclusions: The results of the study provide the first evidence that different anaphylactic triggers, induce differential metabolic changes. Besides, the basal status might identify high risk patients, thus opening new ways to understand, diagnose and treat anaphylaxis. |
| Institute | The Centre of Metabolomics and Bioanalysis |
| Department | Analytical chemistry |
| Last Name | Obeso Montero |
| First Name | David |
| Address | Av. de Montepríncipe, s/n |
| david.obesomontero@beca.ceu.es | |
| Phone | 607535650 |
| Submit Date | 2021-01-18 |
| Num Groups | 2 groups |
| Total Subjects | 20 |
| Raw Data Available | Yes |
| Raw Data File Type(s) | d |
| Analysis Type Detail | NMR |
| Release Date | 2022-01-18 |
| Release Version | 1 |
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Collection:
| Collection ID: | CO001725 |
| Collection Summary: | A prospective clinical and observational study of patients with anaphylactic reactions was performed. Patients of all ages and both sexes were recruited at outpatient clinics and the departments of Emergency, and other services at Hospital La Fe. All fulfilled clinical criteria of anaphylaxis and severity was graded following the classification by Brown, et al3. Patients were classified as food, drug or idiopathic origin, as well as in mild, moderate or severe according to the number of organs affected and clinical symptoms. The allergy evaluation was conducted by the Allergology Service of Hospital La Fe. The ethical committee approved the study protocol and all subjects were informed and provided written consent. Serum samples were taken during the acute moment of the reaction at the first moment of medical attention (< 2h, hereafter referred as ‘T1’), and after clinical recovery (approximately 2-4h later, referred to as ‘T2’). Patients were treated according to the Galaxy 2016 practical guide, using all necessary drugs to rescue them. Samples were collected, following specific standard operating procedures (SOPs)31-33. Briefly, these were collected in a vacutainer tube (Ref. 368965) and processed within the first 30 to 60 min after blood extraction. Sample aliquots were stored at -80ºC until further analyses. Subsequently, between 2-3 months after the anaphylaxis, a serum sample was taken when the allergy evaluation was performed (basal state, called ‘T0’). |
| Sample Type: | Blood (serum) |
| Storage Conditions: | -80℃ |
