Antiallergic chromones. I. Disposition of 5-(3-p-cyanophenoxy-2-hydroxy-1-propoxy)-2-(1H-tetrazol-5-yl) chromone in four mammalian species

Muni, Indu A.; Leeling, Jerry L.; Helms, R J; Johnson, Ned

doi:10.1016/s0041-008x(78)80012-x

Cited by 5 publications

(1 citation statement)

References 3 publications

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“…However, reports on the metabolism or absorption properties of chromones are limited (Kanai et al, 1979; Maurizis et al, 1991; Muni et al, 1978). The present study indicated that aloesin possesses similar absorption pattern with aloe-emodin and also reaches physiological saturation levels at 50 µM.…”

Section: Discussionmentioning

confidence: 99%

Intestinal absorption of aloin, aloe-emodin, and aloesin; A comparative study using two in vitro absorption models

2009

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Aloe products are one of the top selling health-functional foods in Korea, however the adequate level of intake to achieve desirable effects are not well understood. The objective of this study was to determine the intestinal uptake and metabolism of physiologically active aloe components using in vitro intestinal absorption model. The Caco-2 cell monolayer and the everted gut sac were incubated with 5-50 µM of aloin, aloe-emodin, and aloesin. The basolateral appearance of test compounds and their glucuronosyl or sulfated forms were quantified using HPLC. The % absorption of aloin, aloe-emodin, and aloesin was ranged from 5.51% to 6.60%, 6.60% to 11.32%, and 7.61% to 13.64%, respectively. Up to 18.15%, 18.18%, and 38.86% of aloin, aloe-emodin, and aloesin, respectively, was absorbed as glucuronidated or sulfated form. These results suggest that a significant amount is transformed during absorption. The absorption rate of test compounds except aloesin was similar in two models; more aloesin was absorbed in the everted gut sac than in the Caco-2 monolayer. These results provide information to establish adequate intake level of aloe supplements to maintain effective plasma level.

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Section: Discussionmentioning

confidence: 99%