Abstract：
:The presence of an α-1,6-glucosaccharide enhances absorption of water-soluble quercetin glycosides, a mixture of quercetin-3-O-β-d-glucoside (Q3G, 31.8%), mono (23.3%), di (20.3%) and more d-glucose adducts with α-1,4-linkage to a d-glucose moiety of Q3G, in a ligated small intestinal loop of anesthetized rats. We prepared α-1,6-glucosaccharides with different degrees of polymerization (DP) enzymatically and separated them into a megalo-isomaltosaccharide-containing fraction (M-IM, average DP=11.0) and an oligo-isomaltosaccharide-containing fraction (O-IM, average DP=3.6). Luminal injection of either saccharide fraction promoted the absorption of total quercetin-derivatives from the small intestinal segment and this effect was greater for M-IM than O-IM addition. M-IM also increased Q3G, but not the quercetin aglycone, concentration in the water-phase of the luminal contents more strongly than O-IM. The enhancement of Q3G solubilization in the luminal contents may be responsible for the increases in the quercetin glucoside absorption promoted by α-1,6-glucosaccharides, especially that by M-IM. These results suggest that the ingestion of α-1,6-glucosaccharides promotes Q3G bioavailability.
journal_name
Food Chemjournal_title
Food chemistryauthors
Shinoki A,Lang W,Thawornkuno C,Kang HK,Kumagai Y,Okuyama M,Mori H,Kimura A,Ishizuka S,Hara Hdoi
10.1016/j.foodchem.2012.08.028subject
Has Abstractpub_date
2013-01-15 00:00:00pages
293-6issue
2eissn
0308-8146issn
1873-7072pii
S0308-8146(12)01312-Xjournal_volume
136pub_type
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