Abstract
Lifestyle change, including diet changes, often lead to an impairment of biological rhythms regulating production of gastrointestinal hormones, enzymes, neuropeptides, and various cytokines that ensure proper functioning of the digestive tract. Such changes are almost always associated with microbiota disorders and increase permeability of the intestinal mucosa. Zonulin is a diagnostic marker regulating intestinal wall stability and modulating the density of intercellular connections. Its biological role and mechanism of action are being actively studied now. This literature review aims to summarize the results of latest studies published over the last five years analyzing the role of zonulin in various diseases and conditions. The article also covers some aspects suggesting that zonulin can be used as a marker of normal functioning of the intestinal barrier not only in therapeutic, but also in obstetric and pediatric practice. Key words: biomarker, inflammatory cytokines, gestation, depression, zonulin, intestinal barrier, metabolism, microbiota, intestinal wall permeability
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