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Citation Information: JCI Insight. 2025;10(19):e178595. https://doi.org/10.1172/jci.insight.178595.
Abstract
Clinical trials have identified 2 distinct eosinophilic esophagitis (EoE) treatment phenotypes: those that show proton pump inhibitor (PPI) responsiveness (PPI-R) and those that show PPI unresponsiveness (PPI-UR). Comprehensive clinical, endoscopic, and RNA-Seq analyses of patients with EoE prior to and following PPI therapy have not previously been performed to our knowledge. We showed that clinical, endoscopic, and histologic evaluation of esophageal biopsies from pediatric PPI-R and PPI-UR individuals with EoE prior to PPI therapy (diagnosis) were indistinguishable. RNA-Seq analyses revealed common immune and inflammatory transcriptional signatures in both PPI-R EoE and PPI-UR EoE esophageal biopsy samples at diagnosis and distinct signatures enriched for processes related to neuropeptide signaling and cell cycle and division. PPI therapy induced histologic, endoscopic, and transcriptional remission in PPI-R EoE, but not in PPI-UR EoE. Persistent disease in PPI-UR EoE was associated with the presence of Th2 inflammatory and dedifferentiated esophageal epithelial transcriptomic signatures, while PPI-R EoE revealed genes enriched in cellular responses to LPS, host defense against viruses, and type I IFN signaling. In silico analyses identified common and unique EoE disease gene drivers in PPI-R and PPI-UR EoE. These studies indicate that the 2 EoE phenotypes have unique transcriptomic elements that underlie the molecular nature of PPI-R and PPI-UR EoE disease.
Authors
Somdutta Chakraborty, Ankit Sharma, Sahiti Marella, Christian F. Rizza, Patrick A. O’Brien, Varsha Ganesan, Gila Idelman, Susie Min, Mayee Chen, Talaya McCright-Gill, Nancy Gonzalez, Alexandros D. Polydorides, Paul S. Foster, Simon P. Hogan, Mirna Chehade
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