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Component-resolved diagnostics in pediatric wheat-dependent exercise-induced anaphylaxis: A case report.

Manabu Miyamoto1, Nobuyuki Maruyama2, Shigemi Yoshihara3,4

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Summary

Wheat-dependent exercise-induced anaphylaxis (WDEIA) diagnosis in children may require alternative markers. Alpha/beta gliadin-specific IgE shows promise when omega-5 gliadin tests are negative, improving diagnostic accuracy for pediatric wheat allergy.

Keywords:
allergensexercise-induced allergiesomega-5 gliadintriticum aestivumwheat hypersensitivity

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Area of Science:

  • Allergy and Immunology
  • Pediatric Allergy
  • Food Hypersensitivity

Background:

  • Wheat-dependent exercise-induced anaphylaxis (WDEIA) is an IgE-mediated allergic reaction triggered by wheat consumption followed by physical activity.
  • Diagnosis typically relies on omega-5 gliadin-specific IgE (sIgE) testing, but its sensitivity is lower in pediatric populations.
  • Accurate diagnosis is crucial for managing WDEIA and preventing severe allergic reactions.

Observation:

  • A 13-year-old male presented with anaphylaxis after ingesting wheat and exercising.
  • Initial ImmunoCAP testing showed positive wheat and gluten sIgE but negative omega-5 gliadin sIgE.
  • An oral food challenge with exercise confirmed WDEIA.

Findings:

  • Alpha/beta gliadin-specific IgE was detected via ELISA in the patient's serum, suggesting its utility.
  • This indicates that omega-5 gliadin sIgE alone may be insufficient for diagnosing WDEIA in children.
  • Alpha/beta gliadin sIgE can potentially serve as an alternative diagnostic marker in pediatric WDEIA cases.

Implications:

  • Current diagnostic strategies for WDEIA in children may need revision.
  • Testing for alpha/beta gliadin sIgE could improve diagnostic sensitivity and specificity in pediatric WDEIA.
  • A combination of wheat protein component testing may offer a more comprehensive approach to diagnosing WDEIA in children.