Effect of Gliadin on Permeability of Intestinal Biopsy Explants From Celiac and Non-Celiac Gluten Sensitivity Patients

This study examined whether gliadin — a component of gluten — increases “leaky gut,” the intestinal permeability hypothesized to drive inflammation, using tissue biopsies from celiac and non-celiac individuals.

Gliadin exposure increased permeability across all groups, including people with non-celiac gluten sensitivity and even some controls, with the greatest effect in active celiac disease. The work is associated with Alessio Fasano’s research on the gut-barrier protein zonulin and the broader hypothesis linking intestinal permeability to systemic inflammation.

The connection to cardiovascular disease is indirect and speculative — chronic low-grade inflammation is a cardiovascular risk factor, and gut barrier integrity is one proposed contributor — but this study is about intestinal physiology, not the heart, and uses a small ex vivo sample.

We rate the evidence moderate-to-limited. It is a competent mechanistic study in a niche area; its relevance to cardiovascular prevention is several inferential steps removed and unproven.