Lowering effect of combined sweet potato and onion intake on plasma quercetin concentration and underlying mechanism involving intestinal β-glucosidase activity

Author:

Nuka Erika1,Takahashi Masako2,Okitsu Masami2,Nayama Chisako2,Nishijima Honomi1,Sogawa Ryutaro3,Kawabata Kyuichi1,Terao Junji1,Mukai Rie23ORCID

Affiliation:

1. Faculty of Clinical Nutrition and Dietetics, Konan Women's University , 6-2-23 Morikita-machi, Kobe , Japan

2. Department of Nutrition, Faculty of Medicine, Tokushima University , 3-18-15 Kuramoto-cho, Tokushima , Japan

3. Department of Food Science, Graduate School of Technology, Industrial and Social Sciences, Tokushima University , 2-1 Minami-Josanjima-cho, Tokushima , Japan

Abstract

ABSTRACT A combined intake of cooked sweet potato and fried onion in humans was found to suppress the increase of plasma quercetin metabolite concentration. Experiments using rat β-glucosidase indicated that excess carbohydrate digestion products, especially glucose-containing saccharides, interfere with the deglycosylation of quercetin glucosides during intestinal epithelial uptake. Combined meals of sweet potato and onion may lower the bioavailability of onion quercetin glucosides.

Funder

Ministry of Agriculture, Forestry and Fisheries

Publisher

Oxford University Press (OUP)

Subject

Organic Chemistry,Molecular Biology,Applied Microbiology and Biotechnology,General Medicine,Biochemistry,Analytical Chemistry,Biotechnology

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