Increased Serum Zonulin Levels as an Intestinal Permeability Marker in Autistic Subjects

The Journal of Pediatrics
Erman EsnafogluTevfik Noyan

Abstract

To evaluate the serum levels of zonulin, which regulates tight junctions between enterocytes and is a physiological modulator controlling intestinal permeability, in patients with autism spectrum disorders (ASDs). Serum zonulin levels were determined in 32 patients with ASD and 33 healthy controls using an enzyme-linked immunosorbent assay. The severity of ASD symptoms was assessed with the Childhood Autism Rating Scale. Serum zonulin levels were significantly higher in the patients with ASD (122.3 ± 98.46 ng/mL) compared with the healthy controls (41.89 ± 45.83 ng/mL). There was a positive correlation between zonulin levels and Childhood Autism Rating Scale score when all subjects were assessed (r = 0.523; P < .001). This study suggests that zonulin, which regulates intestinal permeability, plays a role in the development of symptoms of ASD.

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