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Studies on the in vitro absorption of spice principles – Curcumin, capsaicin and piperine in rat intestines

Suresh, D. and Srinivasan, K. (2007) Studies on the in vitro absorption of spice principles – Curcumin, capsaicin and piperine in rat intestines. Food and Chemical Toxicology, 45 (8). pp. 1437-1442.

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Abstract

A comparative evaluation of the absorbability of three structurally similar and physiologically active spice principles in an in vitro system consisting of everted rat intestinal sacs was made. When everted sacs of rat intestines were incubated with 50–1000 lg of curcumin in 10 ml incubation medium, absorption of the spice principle was maximum at 100 lg concentration. The amount of absorbed curcumin present in the serosal fluid was negligible. This and the comparatively lower recovery of the original compound suggested that curcumin to some extent undergoes a modification during absorption. For similar concentrations of added piperine, about 44–63% of piperine disappeared from the mucosal side. Absorption of piperine which was maximum at 800 lg per 10 ml was about 63%. The absolute amounts of piperine absorbed in this in vitro system exceeded the amounts of curcumin. The absorbed piperine could be traced in both the serosal fluid and in the intestinal tissue, indicating that piperine did not undergo any metabolic change during the process of absorption. 7–12% of the absorbed piperine was found in the serosal fluid. When everted sacs of rat intestines were incubated with 10–500 lg of capsaicin, a maximum of 82–88% absorption could be seen in the lower concentrations, and the amount of absorbed capsaicin did not proportionately increase at higher concentrations. A relatively higher percentage of the absorbed capsaicin could be seen in the serosal fluid as compared to curcumin or piperine. When these spice active principles were associated with mixed micelles, their in vitro intestinal absorption was relatively higher. Curcumin absorption in everted intestinal sac increased from 48.7% to 56.1% when the same was present in micelles. In the case of capsaicin and piperine, increase in absorption was 27.8–44.4% and 43.4–57.4%, respectively, when they were present in micelles as compared to its native form.

Item Type: Article
Uncontrolled Keywords: Curcumin; Capsaicin; Piperine; In vitro absorption; Everted intestine; Encapsulation
Subjects: 600 Technology > 08 Food technology > 30 Spices/Condiments
600 Technology > 08 Food technology > 32 Antioxidants
Divisions: Dept. of Biochemistry
Depositing User: Food Sci. & Technol. Information Services
Date Deposited: 18 Aug 2008 07:11
Last Modified: 28 Dec 2011 10:04
URI: http://ir.cftri.com/id/eprint/8677

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