2007 Fiscal Year Final Research Report Summary
STUDY ON THE DEVELOPMENT OF THE SCORE AS AN INDEX FOR THE EEFECT OF POLYPHENOL-CONTAINING FOODS ON THE REDUCTION OF BLOOD GLUCOSE LEVEL
| Project/Area Number |
18500627
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Eating habits, studies on eating habits
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| Research Institution | Okayama Prefectural University |
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Principal Investigator |
TSUJI Hideaki Okayama Prefectural University, Faculty of Health and Welfare Science, Department of Nutritional Science, Professor (20093875)
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| Co-Investigator(Kenkyū-buntansha) |
HIEMORI Miki Okayama Prefectural University, Faculty of Health and Welfare Science, Department of Nutritional Science, Assistant Professor (80326412)
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| Project Period (FY) |
2006 – 2007
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| Keywords | Polyphenol / Bllod glucose / Food style-induced disease / α-glucosidase inhibition / Chlorogenic acid / Chlorogenic acid derivative / Catechin / Quercetin |
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| Research Abstract |
Life-style-induced disease is a critical social problem. Diabete is one of the life-style-induced diseases. The disease consists of two types, namely I-type which is dependent on insulin, and IItype, which is nondependent on insulin. The latter type accounts for more than 95% of total diabetic patients. In order to cure and prevent the omset of the insuline-nondependent, a drug such as Acalbose and functional foods including functional components such as wheat albumin, quava polyphenol and digestion-resitant polydextrose have been utilized At present, other functional components than the above-mentioned components are expected to be developed.
In order to establish an index assessing the effect of polyphenol-containing foods on reduction of blood glucose level, it is very important to elucidate the functional components in the foods responsible for the reduction of blood glucose level We carried out the investigation on polyphenol compounds in foods actively. Consequently, we found out chlorogenic acid as a functional components inducing the reduction of blood glucose level Furthermore, catechins and quercetin were shown to show the functionality inducing the reduction of blood glucose level o among the known polyphenol compounds. Interestingly, these polyphenol components were shown to exhibit the regulation of the blood glucose level by inhibition α-glucosidase activity such as sucrase and maltase.
We found out the occurrence of chlorogenic acid derivatives in the leavers of white sweet potato called Kibimidori in Okayama region. These chlorogenic acid derivatives were shown to show more powerful inhibitory activity for α-glucosidase activity than chlorogenic acid, quecetin and catechins. This finding indicates that these components are candidate as afunctional components responsible for the reduction of blood glucose level.
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[Journal Article] Characterization of inhibitors of postprandial hyperglycemia from the leaves of Nerium indicum2007
Author(s)
A. Ishikawa, H. Yamamshita, M. Hiemori, E. Inagaki, M. Kimoto, M. Okamoto, H. Tsuji, A.N. Memon, A. Mohammadi, Y. Natori
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Journal Title
J. Nutr. Sci. Vitaminol Vol. 53, No. 2
Pages: 166-173
Description
「研究成果報告書概要(欧文)」より
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