A Systematic Review of Metabolic Alterations Underlying IgE-Mediated Food Allergy in Children

Ellen De Paepe, Lynn Van Gijseghem, Margot De Spiegeleer, Eric Cox, Lynn Vanhaecke

Research output: Contribution to journalArticlepeer-review

Abstract

Scope
Immunoglobulin E-mediated food allergies (IgE-FA) are characterized by an ever-increasing prevalence, currently reaching up to 10.4% of children in the European Union. Metabolomics has the potential to provide a deeper understanding of the pathogenic mechanisms behind IgE-FA.

Methods and Results
In this work, literature is systematically searched using Web of Science, PubMed, Scopus, and Embase, from January 2010 until May 2021, including human and animal metabolomic studies on multiple biofluids (urine, blood, feces). In total, 15 studies on IgE-FA are retained and a dataset of 277 potential biomarkers is compiled for in-depth pathway mapping. Decreased indoleamine 2,3-dioxygenase-1 (IDO- 1) activity is hypothesized due to altered plasma levels of tryptophan and its metabolites in IgE-FA children. In feces of children prior to IgE-FA, aberrant metabolization of sphingolipids and histidine is noted. Decreased fecal levels of (branched) short chain fatty acids ((B)SCFAs) compel a shift towards aerobic glycolysis and suggest dysbiosis, associated with an immune system shift towards T-helper 2 (Th2) responses. During animal anaphylaxis, a similar switch towards glycolysis is observed, combined with increased ketogenic pathways. Additionally, altered histidine, purine, pyrimidine, and lipid pathways are observed.

Conclusion
To conclude, this work confirms the unprecedented opportunities of metabolomics and supports the in-depth pathophysiological qualification in the quest towards improved diagnostic and prognostic biomarkers for IgE-FA.
Original languageEnglish
Article number2100536
JournalMolecular Nutrition & Food Research
Early online date20 Oct 2021
DOIs
Publication statusEarly online date - 20 Oct 2021

Keywords

  • systematic review
  • pathway analysis
  • food allergy
  • metabolomics
  • biomarker

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