Effect of sulfated polysaccharides on the digestion of DNA by pepsin under simulated gastric juice in vitro.

07:00 EST 13th February 2020 | BioPortfolio

Summary of "Effect of sulfated polysaccharides on the digestion of DNA by pepsin under simulated gastric juice in vitro."

The effect of sulfated polysaccharides on the digestion of dietary DNA by pepsin was studied using in vitro simulated gastric juice. The results showed that fucoidan (FUC), dextran sulfate (DS) and chondroitin sulfate (CS) could inhibit the digestion of DNA in a dose-dependent manner. Polysaccharides with high sulfate group content have stronger inhibition ability. Fluorescence spectroscopy results showed that polysaccharides could bind to pepsin, and transmission electron microscopy (TEM) confirmed that polysaccharides can interact with DNA, which not only is the main reason that polysaccharides inhibit the digestion of DNA by pepsin but also causes the digestion of DNA by DNase II to be inhibited. The finding suggests that the digestion of DNA should be reevaluated when eating foods rich in sulfated polysaccharides. This study enriched the known pharmacological properties of sulfated polysaccharides as pepsin inhibitors and provided inspiration for the use of sulfated polysaccharides as oligonucleotide drug delivery carriers.


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Name: Food & function
ISSN: 2042-650X


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Medical and Biotech [MESH] Definitions

Proenzymes secreted by chief cells, mucous neck cells, and pyloric gland cells, which are converted into pepsin in the presence of gastric acid or pepsin itself. (Dorland, 28th ed) In humans there are 2 related pepsinogen systems: PEPSINOGEN A (formerly pepsinogen I or pepsinogen) and PEPSINOGEN C (formerly pepsinogen II or progastricsin). Pepsinogen B is the name of a pepsinogen from pigs.

Epithelial cells that line the basal half of the GASTRIC GLANDS. Chief cells synthesize and export an inactive enzyme PEPSINOGEN which is converted into the highly proteolytic enzyme PEPSIN in the acid environment of the STOMACH.

Ulcer that occurs in the regions of the GASTROINTESTINAL TRACT which come into contact with GASTRIC JUICE containing PEPSIN and GASTRIC ACID. It occurs when there are defects in the MUCOSA barrier. The common forms of peptic ulcers are associated with HELICOBACTER PYLORI and the consumption of nonsteroidal anti-inflammatory drugs (NSAIDS).

A synthetic PGE2 analog that has an inhibitory effect on gastric acid secretion, a mucoprotective effect, and a postprandial lowering effect on gastrin. It has been shown to be efficient and safe in the treatment of gastroduodenal ulcers.

The remnants of plant cell walls that are resistant to digestion by the alimentary enzymes of man. It comprises various polysaccharides and lignins.

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