Intestinal uptake of genistein and its glycoside in the rat using various isolated perfused gut segments.

Abstract:

:Genistein receives much attention because of its potential to prevent hormone-related cancer and cardiovascular diseases. Limited information is available on the pharmacokinetics of this compound like, for instance, their intestinal uptake by humans and systematic bioavailability. In this study, the fate of the absorption of genistein and its glycoside has been analysed in various isolated perfused gut segments of the rat. In all perfused gut segments the transport of genistein was higher compared to its glycoside. Furthermore, it appeared that the resorbate (i.e. serosal side) concentration of genistein was the highest in ileac segments, whereas the transport of genistein in the various other segments tested showed no difference between intestinal compartments. Less than 0.2% of genistin appeared in the resorbate fluid of all isolated gut segments. The main site of metabolism of genistein and its glycoside appears to be located in the jejunal compartment of the rat gut. About 38% of genistein and about 29% of genistin metabolised within 2h of perfusion. In the ileac and colonic intestinal segments, genistein metabolised for only 10%. For the first time, this study demonstrated that genistin could be metabolised by epithelial cells present in isolated colonic segments. However, the metabolites of genistin did not occur at the serosal side (the resorbate) of isolated colonic segments. We assume that there is no absorption of genistin and/or its metabolites in or through colonic tissue of the rat.

authors

Steensma A,Bienenmann-Ploum ME,Noteborn HP

doi

10.1016/j.etap.2004.03.008

subject

Has Abstract

pub_date

2004-06-01 00:00:00

pages

103-10

issue

2

eissn

1382-6689

issn

1872-7077

pii

S1382-6689(04)00060-2

journal_volume

17

pub_type

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