Pediatric Eosinophilic Esophagitis: Searching for Serologic Markers

Area of Science:

• Immunology
• Gastroenterology
• Allergy

Background:

• Eosinophilic esophagitis (EoE) is a Th2-mediated allergic inflammatory disease of the esophagus.
• Current diagnosis relies on clinical symptoms and endoscopic biopsies showing esophageal eosinophilia.
• A reliable serologic marker for EoE diagnosis and monitoring is currently lacking.

Purpose of the Study:

• To identify a reliable serologic marker for eosinophilic esophagitis (EoE).
• To utilize custom-designed Luminex multiplex bead assays for screening potential biomarkers.

Main Methods:

• Luminex assays were used to measure serum levels of 11 analytes (including cytokines and immunoglobulins) in pediatric patients.
• The study cohort included patients with active EoE (n=30), EoE in remission (n=13), and healthy controls (n=34).

Main Results:

• No significant elevation or depression of the 11 tested analytes was observed in active EoE patients compared to other groups.
• None of the analytes correlated with peak esophageal eosinophil counts, endoscopic severity (EREFS), or esophageal thickness.

Conclusions:

• This study, the largest prospective survey of its kind, did not identify any reliable serologic markers for diagnosing or monitoring EoE.
• Luminex technology offers a rapid and cost-effective platform for screening multiple serum proteins in disease states.