The intestinal epithelium as guardian of gut barrier integrity

Abstract excerpt

A single layer of epithelial cells separates the intestinal lumen from the underlying sterile tissue. It is exposed to a multitude of nutrients and a large number of commensal bacteria. Although the presence of commensal bacteria significantly contributes to nutrient digestion, vitamin synthesis and tissue maturation, their high number represents a permanent challenge to the integrity of the epithelial surface...

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