In active celiac disease, intestinal cells produce excess IL-15, which sustains the activity of nearby immune cells in the gut lining, leading to ongoing tissue injury. This finding is from the abstract summary - full study details were not available.
Evidence from Studies
No evidence studies found yet.
What Would Prove This
Per GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this claim, ordered from strongest to weakest.
A systematic review could consolidate evidence from multiple studies showing consistent IL-15 upregulation in active celiac disease biopsies compared to controls, and its correlation with lymphocyte density and tissue damage severity.
A systematic review and meta-analysis of 20+ studies measuring IL-15 expression (via IHC or qPCR) in duodenal biopsies from patients with active celiac disease, treated celiac disease, and healthy controls, with standardized scoring of lymphocyte infiltration and villous atrophy.
An RCT could demonstrate that blocking IL-15 signaling reduces intraepithelial lymphocyte activation and improves histological damage in active celiac disease.
A double-blind RCT of 60 adults with active celiac disease on a gluten-free diet but persistent histologic damage, randomized to receive anti-IL-15 monoclonal antibody or placebo for 12 weeks, with primary outcome of change in intraepithelial lymphocyte count and villous height-to-crypt depth ratio on biopsy.
A prospective cohort could show that IL-15 levels in biopsy tissue predict progression from latent to active celiac disease.
A prospective cohort of 200 HLA-DQ2/DQ8-positive individuals with seropositivity but normal biopsy, followed for 3 years with annual biopsies measuring IL-15 expression, tracking conversion to villous atrophy and lymphocyte infiltration.
A cross-sectional study could correlate IL-15 expression levels with the degree of intraepithelial lymphocytosis and villous atrophy in a single biopsy sample.
A cross-sectional analysis of 150 duodenal biopsies from patients with celiac disease, measuring IL-15 protein levels by immunohistochemistry and quantifying intraepithelial lymphocytes and villous atrophy on the same samples.
An expert opinion can summarize existing hypotheses about IL-15's role in celiac pathogenesis without providing new data.
A narrative review compiling case reports, in vitro studies, and observational data to propose IL-15 as a key mediator in celiac disease progression.