Journal
FOODS
Volume 12, Issue 13, Pages -Publisher
MDPI
DOI: 10.3390/foods12132636
Keywords
p-hydroxycinnamic acids; ferulic acid; caffeic acid; sinapic acid; p-coumaric acid; intestinal barrier
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The review summarizes the protective effects of p-Hydroxycinnamic acids (HCAs) on the intestinal barrier. These effects are achieved through four mechanisms: preserving tight junction proteins, modulating pro-inflammatory cytokines, exerting antioxidant activity, and regulating the intestinal microbiota.
It is well established that p-Hydroxycinnamic acids (HCAs), including ferulic, caffeic, sinapic, and p-coumaric acids, possess a characteristic phenylpropanoid C6-C3 backbone and account for about one-third of the phenolic compounds in our diet. HCAs are typically associated with various plant cell wall components, including mono-, di-, and polysaccharides, sterols, polyamines, glycoproteins, and lignins. Interestingly, enzymes produced by intestinal microbes liberate HCAs from these associations. HCAs are completely absorbed in their free form upon ingestion and undergo specific reactions upon absorption in the small intestine or liver. The gut epithelium, composed of intestinal epithelial cells (IECs), acts as a physical barrier against harmful bacteria and a site for regulated interactions between bacteria and the gut lumen. Thus, maintaining the integrity of the epithelial barrier is essential for establishing a physiochemical environment conducive to homeostasis. This review summarizes the protective effects of HCAs on the intestinal barrier, achieved through four mechanisms: preserving tight junction proteins (TJPs), modulating pro-inflammatory cytokines, exerting antioxidant activity, and regulating the intestinal microbiota.
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