Intestinal Permeability of Agaro-oligosaccharides: Transport Across Caco-2 Cell Monolayers and Pharmacokinetics in Rats

Overview

Journal Front Nutr

Specialty Nutritional Sciences

Date 2022 Oct 3

PMID 36185657

Authors

Ikuya Shirai

Koji Karasawa

Yusuke Kodaira

Yu Iwasaki

Yasutaka Shigemura

Hidefumi Makabe

Shigeru Katayama

Affiliations

Soon will be listed here.

Abstract

Agaro-oligosaccharides (AOSs), even-numbered oligosaccharides prepared from agar, are applied to various food, including supplements, drinks, and jellies because of their biological activities. This study aimed to evaluate the AOS permeation in the gastrointestinal tract and . Agarobiose (Abi), agarotetraose (Ate), and agarohexaose (Ahe) were detected in rat plasma after oral administration of AOSs. The detection level of agarobiose in the plasma was higher than that of agarohexaose, which was consistent with the permeation study using Caco-2 cell monolayers. Further, the adenosine triphosphate inhibitor (sodium azide) or endocytosis inhibitor (colchicine) did not inhibit AOS permeation through Caco-2 cell monolayers. Conversely, AOS permeation enhanced upon treatment with cytochalasin B, a tight junction disrupter, suggesting that AOSs might have passed mainly through the tight junctions between the intestinal epithelial cells. These results indicate that AOSs, especially agarobiose, can be absorbed as an intact form the gastrointestinal tract across the intestinal epithelium through the paracellular pathway.

Citing Articles

Orally administered low-molecular weight agaro-oligosaccharides are absorbed into the plasma of healthy humans.

Shirai I, Iwasaki Y, Karasawa K, Shigemura Y, Katayama S Front Nutr. 2023; 10:1273328.

PMID: 37818337 PMC: 10560721. DOI: 10.3389/fnut.2023.1273328.

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