New insights in eosinophilic gastrointestinal diseases

Eosinophilic esophagitis (EoE) is a chronic condition driven by type 2 immunity and commonly triggered by dietary antigens. Conventional diagnostic tools (skin prick, serum IgE) lack accuracy. It was demonstrated that ex vivo culturing of esophageal biopsies with food antigens elicited more relevant inflammatory responses than systemic tests. Identified cytokines (IL-5, IL-8, MCP-1, TNF) served as stronger predictors of food triggers.
A recently described phenomenon FIRE (Food-induced Immediate Response of the Esophagus) presents with rapid postprandial symptoms. High-resolution manometry showed that allergen exposure caused increased contractile vigor but no major motility abnormalities. This suggests that mechanisms beyond motility changes are responsible.
Treatment adherence was suboptimal in approximately 42% of patients with EoE, paralleling other chronic diseases. Younger age (<40) and low necessity beliefs were significant predictors of non-adherence. This underscores the need for enhanced shared decision-making and structured adherence monitoring.
A cohort of patients with non-EoE eosinophilic gastrointestinal disorders (EGIDs) was examined. Patients exhibited nonspecific symptoms and frequently normal endoscopy despite mucosal eosinophilia. No evidence of disease extension across sites or layers was observed. Symptom improvement was common, though standardized treatment strategies are lacking.
Finally, the role of eosinophils in ulcerative colitis (UC) was investigated. Elevated eosinophil counts correlated with severe disease but were not prognostic in new UC, suggesting a secondary inflammatory role rather than causality.