Blood Test for Identifying Food Triggers in Eosinophilic Esophagitis (EoE)

This important clinical study is exploring a new blood test that may help identify specific food triggers in patients with eosinophilic esophagitis (EoE). EoE is a chronic immune system disease where certain foods cause white blood cells (eosinophils) to build up in the esophagus, leading to inflammation and difficulty swallowing.

The study will enroll 50 participants (children and adults) who have been diagnosed with EoE but haven't yet identified which foods are causing their symptoms. Researchers will draw blood to test how immune cells (T cells) react to four common trigger foods: milk, soy, egg, and wheat. Based on these test results and standard medical practice, doctors will recommend a personalized elimination diet for each participant.

To measure whether the diet helps, participants will:

• Complete symptom surveys (PEESS)
• Undergo follow-up endoscopy with biopsies (standard care)

The research team hopes this blood test could become a valuable tool to help EoE patients identify their trigger foods without needing multiple elimination diets and endoscopies, which can be challenging especially for children.

This study is particularly exciting because current methods for identifying food triggers require strict elimination diets followed by repeated endoscopies - a process that can take months and be difficult to maintain. A reliable blood test could make diagnosis and management much easier for patients and families.

EoE research has grown significantly in recent years as more cases are being diagnosed. Understanding food triggers is crucial because dietary management is often the preferred treatment approach, especially for children who may want to avoid long-term medications. The condition affects people of all ages and can significantly impact quality of life, making studies like this critically important.

While this is a pilot study (proof-of-concept), it represents an important step toward personalized medicine for EoE patients. The researchers at Children's Hospital of Philadelphia are collaborating with leading patient advocacy groups to ensure this work addresses real patient needs.

For families affected by EoE, this type of research offers hope for simpler diagnosis and more effective dietary management in the future. The study may also contribute to our broader understanding of how food allergies and immune responses contribute to EoE development.