Involvement of interleukin-18 in the pathogenesis of human eosinophilic esophagitis

Rituraj Niranjan, Priya Rajavelu, Sathisha Upparahalli Ventateshaiah, Jai Shankar Shukla, Asifa K Zaidi, Siddesha Jalahalli Mariswamy, Jochen Mattner, Ilana Fortgang, Monika Kowalczyk, Luis Balart, Anshi Shukla, Anil Mishra

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

IL-18 is induced in food allergy and EoE is food allergen-induced disease. Therefore, we tested the hypothesis whether IL-18 is involved in food allergen-induced EoE pathogenesis. Accordingly, we examined normal SPT + and SPT - EoE patient blood and biopsy samples for IL-18, IL-18Rα, ICAM and VCAM expression. Herein, we show increased IL-18 level is highly significant in food allergen SPT + compared to SPT. - EoE patients. We also report that IL-18Rα + cells and mRNA levels are induced in the esophageal biopsies of EoE patients and blood IL-18 levels correlate with esophageal eosinophilia (P < 0.01). Additionally, we report that the levels of esophageal eosinophil and mast cells correlate with ICAM expression in human EoE. Mechanistically, we show that IL-18 in vitro stimulates iNKT cells and endothelial cells and induce eosinophil active cytokines IL-5 and IL-13. We provide the evidence that IL-18 is critical cytokine involved in activation of iNKT cells and ICAM in promoting human EoE.

Original languageEnglish (US)
Pages (from-to)103-113
Number of pages11
JournalClinical Immunology
Volume157
Issue number2
DOIs
StatePublished - Apr 1 2015

Keywords

  • EoE
  • ICAM
  • IL-18Rα
  • INKT cells
  • Interleukin-IL-18

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology

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